US20090194934A1 - Paper feeding device for image forming apparatus - Google Patents
Paper feeding device for image forming apparatus Download PDFInfo
- Publication number
- US20090194934A1 US20090194934A1 US12/363,414 US36341409A US2009194934A1 US 20090194934 A1 US20090194934 A1 US 20090194934A1 US 36341409 A US36341409 A US 36341409A US 2009194934 A1 US2009194934 A1 US 2009194934A1
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- US
- United States
- Prior art keywords
- sheets
- paper feeding
- main body
- size
- apparatus main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6502—Supplying of sheet copy material; Cassettes therefor
- G03G15/6508—Automatic supply devices interacting with the rest of the apparatus, e.g. selection of a specific cassette
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
- G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
- G03G15/6561—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration
- G03G15/6564—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration with correct timing of sheet feeding
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
- G03G15/231—Arrangements for copying on both sides of a recording or image-receiving material
- G03G15/232—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member
- G03G15/234—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters
- G03G15/235—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters the image receiving member being preconditioned before transferring the second image, e.g. decurled, or the second image being formed with different operating parameters, e.g. a different fixing temperature
Definitions
- the present invention relates to a paper feeding device for an image forming apparatus that stably feed sheets to an image forming unit of a copying machine or a multi-function peripheral.
- an image quality is improved through improvement of performance for feeding sheets to an apparatus main body and a sheet jam is prevent from occurring.
- a paper feeding device for an image forming apparatus including: a housing member that is inserted into and removed from an apparatus main body and stores recording media; a guide member that is slidably provided in the housing member and regulates a feeding position of the recording media to an image forming unit; and a driving member that slides the guide member according to a size of the recording media when the housing member is inserted into the apparatus main body.
- FIG. 1 is a schematic diagram of a copying machine according to a first embodiment of the present invention
- FIG. 2 is a schematic top view of a paper feeding cassette according to the first embodiment
- FIG. 3 is a schematic diagram for explaining driving of sidewalls and an end wall of the paper feeding cassette according to the first embodiment
- FIG. 4 is a schematic top view of stop positions of the sidewalls and the end wall of the paper feeding cassette according to the first embodiment
- FIG. 5 is a schematic diagram for explaining supply of sheets into the paper feeding cassette according to the first embodiment.
- FIG. 6 is a schematic top view of a paper feeding cassette according to a third embodiment of the present invention.
- FIG. 1 is a schematic diagram of a copying machine 1 as an image forming apparatus according to the first embodiment.
- the copying machine 1 includes a scanner unit 13 that scans an image, a printer unit 14 that forms an image, a paper feeding unit 21 as a paper feeding device including an upper paper feeding cassette 21 a, a lower paper feeding cassette 21 b, and a large capacity cassette 21 c for feeing sheets P as a recording medium, and a paper discharging unit 70 including a first tray 71 and a second tray 72 for accumulating the sheets P discharged from the printer unit 14 as an image forming unit.
- a control panel 102 as an input unit supported by a pole 101 is provided in an apparatus main body 11 that configures an outer hull of the copying machine 1 .
- a manual paper feeding unit 23 is provided on a side of the apparatus main body 11 .
- a conveying path 40 for the sheets P is provided in a route leading from the paper feeding unit 21 or the manual paper feeding unit 23 to the paper discharging unit 70 through the printer unit 14 of the copying machine 1 .
- the scanner unit 13 scans an object having image information (hereinafter referred to as original document) fed from an auto document feeder (ADF) 35 and capture the image information as image data. After the scanner unit 13 finishes scanning the image information, the ADF 35 discharges the original document to a document discharging unit 31 .
- original document an object having image information
- ADF 35 auto document feeder
- the printer unit 14 forms, on the sheet P, an image corresponding to inputted image information or the image information scanned by the scanner unit 13 .
- the printer unit 14 includes photoconductive drums 41 , charging devices 48 that uniformly charge the photoconductive drums 41 , an exposing device 42 that forms electrostatic latent images on the photoconductive drums 41 , developing devices 43 that develop the electrostatic latent images formed on the photoconductive drums 41 , and a transfer device 44 that transfers toner images developed on the photoconductive drums 41 onto the sheets P of arbitrary sizes.
- the transfer device 44 includes a transfer belt 44 a and a secondary transfer roller 44 b.
- the printer unit 14 further includes a fixing device 45 that fixes the toner images on the sheet P having the toner images transferred thereon by the transfer device 44 .
- the fixing device 45 includes a fixing roller 46 and a press roller 47 .
- the conveying path 40 includes conveying rollers 24 and registration rollers 16 for feeding the sheet P taken out from the paper feeding unit 21 or the manual paper feeding unit 23 by a pickup roller 22 to the transfer device 44 .
- the conveying path 40 conveys the sheet P having the fixed toner images to the paper discharging unit 70 through the transfer device 44 and the fixing device 45 .
- the paper discharging unit 70 includes a paper discharging and conveying path 60 that discharges the sheet P to the first tray 71 or the second tray 72 or reverses the sheet P.
- the paper discharging and conveying path 60 includes a lower conveying path 61 and an upper conveying path 62 .
- a first gate 63 divides the lower conveying path 61 and the upper conveying path 62 .
- the lower conveying path 61 reaches the first tray 71 through a first paper discharge roller 18 .
- the upper conveying path 62 includes a second conveying path 52 on an upper side and a third conveying path 53 on a lower side.
- a second gate 67 divides the second conveying path 52 and the third conveying path 53 .
- the second conveying path 52 reaches the second tray 72 through a second paper discharge roller 19 .
- the third conveying path 53 is a reversing and retracting path for the sheet P.
- the third conveying path 53 includes a reversing and conveying roller 68 .
- the reversing and conveying roller 68 rotates in the opposite direction.
- the reversing and conveying roller 68 rotates in the opposite direction to reversely convey the sheet P from the third conveying path 53 in the direction of a circulating path 50 .
- the circulating path 50 feeds the sheet P to the transfer device 44 again.
- each of the upper paper feeding cassette 21 a and the lower paper feeding cassette 21 b of the paper feeding unit 21 has the same structure.
- each of the upper paper feeding cassette 21 a and the lower paper feeding cassette 21 b includes a case 78 as a housing member that stores the various sheets P and is inserted into and removed from the apparatus main body 11 and a front sidewall 80 f and a rear sidewall 80 r as side guide members that are slidably provided in the case 78 and regulate both sides of the various sheets P.
- each of the upper paper feeding cassette 21 a and the lower paper feeding cassette 21 b includes an end wall 81 as an end guide member that is slidably provided in the case 78 and regulates trailing ends of the various sheets P.
- the case 78 can be drawn out to a front side relative to the apparatus main body 11 .
- the case 78 has on a rear side thereof a connector 78 a for connecting the case 78 to an upper input and output terminal 11 a or a lower input and output terminal 11 b of the apparatus main body 11 when the case 78 is inserted into the apparatus main body 11 .
- a tray-up sheet metal 82 that supports the sheets P is provided on a bottom surface of the case 78 .
- the front sidewall 80 f and the rear sidewall 80 r slide in an arrow “m” direction or an arrow “n” direction along a guide shaft 78 b fixed to the bottom surface of the case 78 .
- the end wall 81 slides in an arrow “s” direction or an arrow “t” direction along a slit 78 c formed in the bottom surface of the case 78 .
- a front ladder 83 f is provided in the front sidewall 80 f.
- a rear ladder 83 r is provided in the rear sidewall 80 r.
- the front ladder 83 f and the rear ladder 83 r engage with a gear 87 driven by a sidewall motor 86 .
- the front ladder 83 f, the rear ladder 83 r, the sidewall motor 86 , and the gear 87 configure a driving member.
- the gear 87 rotates in an arrow “v” direction
- the front sidewall 80 f is slid in the arrow “n” direction by the front ladder 83 f
- the rear sidewall 80 r is slid in the arrow “m” direction by the rear ladder 83 r.
- the end wall 81 is slid by an end wall driving mechanism 84 as a driving member.
- the end wall driving mechanism 84 includes a conveyor belt 88 that reciprocatingly conveys the end wall 81 and an end wall motor 90 that reciprocatingly rotates the conveyor belt 88 .
- the sidewall motor 86 and the end wall motor 90 are connected to a CPU 110 that controls the entire copying machine 1 .
- the sidewall motor 86 and the end wall motor 90 are controlled to be driven by the CPU 110 .
- the paper feeding cassette 21 a or the paper feeding cassette 21 b is drawn out from the apparatus main body 11 to disconnect the connector 78 a from the input and output terminal 11 a or the input and output terminal 11 b of the apparatus main body 11 .
- the sidewall motor 86 drives in the arrow “w” direction to slide the front sidewall 80 f in the arrow “m” direction and open the front sidewall 80 f to the maximum and stops the front sidewall 80 f in a sheet supply position. Further, the sidewall motor 86 slides the rear sidewall 80 r in the arrow “n” direction to open the rear sidewall 80 r to the maximum and stops the rear sidewall 80 r in a sheet supply position.
- a distance between the sidewalls 80 f and 80 r is larger than the width of largest sheets stored in the paper feeding cassette 21 a or 21 b.
- the end wall motor 90 rotates the conveyor belt 88 in the arrow “t” direction and slides the end wall 81 in the arrow “t” direction.
- the end wall motor 90 opens the end wall 81 to the maximum and stops the end wall 81 in a sheet supply position on a rear end side of the case 78 .
- a distance from a distal end 78 d of the case 78 to the end wall 81 is larger than the length of the largest sheets stored in the paper feeding cassette 21 a or 21 b. Opening the front sidewall 80 f, the rear sidewall 80 r, or the end sidewall 81 to the maximum, means the sidewall is opened to a slide limit in the case 78 .
- the sidewall motor 86 drives in the arrow “v” direction to close the front sidewall 80 f and the rear sidewall 80 r according to a size of sheets in the paper feeding cassette 21 a or 21 b.
- the sidewall motor 86 stops the driving.
- the distance between the front sidewall 80 f and the rear sidewall 80 r coincides with the width of the sheets stored in the paper feeding cassette 21 a or 21 b.
- the front sidewall 80 f and the rear sidewall 80 r regulate both sides in the width direction of the sheets P in the paper feeding cassette 21 a or 21 b.
- the end wall motor 90 rotates the conveyor belt 88 in the arrow “s” direction to slide the end wall 81 in the arrow “s” direction and closes the end wall 81 according to the size of the sheets in the paper feeding cassette 21 a or 21 b.
- the end wall motor 90 stops the driving.
- the end wall motor 90 stops the end wall 81 regulates the trailing end of the sheets P in the paper feeding cassette 21 a or 21 b.
- the control panel 102 includes a display unit 102 a and a keyboard 102 b.
- the control panel 102 has an input function for inputting conditions for image formation by the copying machine 1 , start of the image formation, start of image scanning by the scanner unit 13 , and the like to the CPU 110 .
- the control panel 102 has a display function and the like for performing display of a confirmation screen for inputted information and the like and display of a down state and the like of the copying machine 1 .
- the control panel 102 displays insertion and removal of the paper feeding cassettes 21 a and 21 b into and from the apparatus main body 11 .
- a user designates, on the control panel 102 , sizes of the sheets P stored in the paper feeding cassettes 21 a and 21 b.
- the user designates, on the control panel 102 , a size of the sheets P stored in the upper paper feeding cassette 21 a as, for example, the A4 landscape size in the JIS standard.
- the CPU 110 outputs a signal for storing the sheets P of the A4 landscape size in a correct position to the upper input and output terminal 11 a.
- the sidewall motor 86 and the end wall motor 90 of the upper paper feeding cassette 21 a drive, according to the signal from the upper input and output terminal 11 a, to store the sheets P of the A4 landscape size in the correct position in the case 78 .
- the user designates, on the control panel 102 , a size of the sheets P stored in the lower paper feeding cassette 21 b as, for example, the A3 size in the JIS standard.
- the CPU 110 outputs a signal for storing the sheets P of the A3 size in a correct position to the lower input and output terminal 11 b.
- the sidewall motor 86 and the end wall motor 90 of the lower paper feeding cassette 21 b drive, according to the signal from the lower input and output terminal 11 b, to store the sheets P of the A3 size in the correct position in the case 78 .
- the user instructs, on the control panel 102 , the copying machine 1 to form an image on the sheets P.
- the upper paper feeding cassette 21 a stores, for example, the sheets P of the A4 landscape size in the JIS standard as shown in FIG. 4 according to the instruction from the control panel 102 .
- the sidewall motor 86 drives and the front sidewall 80 f and the rear sidewall 80 r slide to positions for regulating both the sides of the sheets P and stop.
- the end wall motor 90 drives and the end wall 81 is slid to a position for regulating the trailing end of the sheets P and stops (indicated by a solid line in FIG. 4 ).
- the lower paper feeding cassette 21 b stores, for example, the sheets P of the A3 size in the JIS standard according to the instruction from the control panel 102 .
- the charging device 48 charges the photoconductive drum 41 .
- the exposing device 42 outputs image light (exposure light) corresponding to image data that should be formed as an image on the charged photoconductive drum 41 .
- the exposing device 42 irradiates the exposure light on the photoconductive drum 41 to form an electrostatic latent image corresponding to the exposure light thereon.
- the electrostatic latent image formed on the photoconductive drum 41 is developed with a toner by the developing device 43 and visualized.
- a toner image obtained by visualizing the electrostatic latent image on the photoconductive drum 41 is transferred onto the sheet P by the transfer device 44 .
- the sheet P is fed from the paper feeding unit 21 or the manual paper feeding unit 23 and conveyed through the conveying path 40 and reaches the transfer device 44 .
- the toner image transferred onto the sheet P is fixed on the sheet P by the fixing device 45 .
- the sheet P having the toner image fixed thereon is conveyed to the paper discharging and conveying path 60 .
- the sheet P is discharged to the first tray 71 or the second tray 72 through the paper discharging and conveying path 60 or conveyed to the transfer device 44 again through the circulating path 50 .
- the control panel 102 displays, on the display panel 102 a, a message for urging supply of the sheets P into the upper paper feeding cassette 21 a.
- the user draws out the upper paper feeding cassette 21 a from the apparatus main body 11 .
- the sidewall motor 86 drives in the arrow “w” direction.
- the front sidewall 80 f slides in the arrow “m” direction to a position indicated by a dotted line in FIG. 4 .
- the rear sidewall 80 r slides in the arrow “n” direction to a position indicated by a dotted line in FIG. 4 .
- the front sidewall 80 f and the rear sidewall 80 r open to maximum positions.
- the end wall motor 90 rotates the conveyor belt 88 in the arrow “t” direction.
- the end wall 81 slides in the arrow “t” direction to a position indicated by a dotted line in FIG. 4 and opens to a maximum position.
- the user supplies the sheets P of the A4 size into the case 78 of the upper paper feeding cassette 21 a.
- the sheets P may out of alignment as shown in FIG. 5 . Even if some of the sheets P are not aligned, after supplying the sheets P into the case 78 , the user directly inserts the upper paper feeding cassette 21 a into the apparatus main body 11 .
- the sidewall motor 86 drives in the arrow “v” direction.
- the front sidewall 80 f and the rear sidewall 80 r slide from the maximum open state to positions for regulating both the sides of the sheets P of the A4 landscape size and stops in a position indicated by a solid line in FIG. 4 .
- the sheets P that are not aligned during the supply into the case 78 come into contact with the front sidewall 80 f and the rear sidewall 80 r to be regulated on both the sides thereof. Both the sides of the sheets P in the case 78 are aligned in A4 landscape size positions.
- the end wall motor 90 rotates the conveyor belt 88 in the arrow “s” direction.
- the end wall 81 slides from the maximum open state to a position for regulating the trailing end of the sheets P of the A4 landscape size and stops in a position indicated by a solid line in FIG. 4 .
- the sheets P that are not aligned during the supply into the case 78 come into contact with the end wall 81 to be regulated at the trailing end thereof.
- the trailing end of the sheets P in the case 78 is aligned in an A4 landscape size position.
- the out of alignment of the sheets P is corrected in the upper paper feeding cassette 21 a.
- the sheets P are supplied in a state aligned in a correct paper feeding position of the A4 landscape size.
- the user supplies the sheets P into the lower paper feeding cassette 21 b instructed to store the sheets P of the A3 size
- the user supplies the sheets P in the same manner as the supply of the sheets P into the upper paper feeding cassette 21 a.
- the user draws out the lower paper feeding cassette 21 b from the apparatus main body 11 .
- the sidewall motor 86 is drove to slide the front sidewall 80 f and the rear sidewall 80 r from positions for regulating the sheets P of the A3 size to the maximum open positions.
- the end wall motor 90 drives to slide the end wall 81 from a position for regulating the sheets P of the A3 size to the maximum open position.
- the user supplies the sheets P of the A3 size into the lower paper feeding cassette 21 b. After supplying the sheets P, the user inserts the lower paper feeding cassette 21 b into the apparatus main body 11 .
- the sidewall motor 86 is drove.
- the front sidewall 80 f and the rear sidewall 80 r slide from the maximum open state to positions for regulating both the ends of the sheets P of the A3 size and stop.
- the end wall motor 90 is drove and the end wall 81 slides from the maximum open state to a position for regulating the trailing end of the sheets P of the A3 size and stops.
- the front sidewall 80 f and the rear sidewall 80 r are in contact with both the sides of the sheets P of the A3 size.
- the sheets P that are not aligned during the supply are regulated on both the sides by the front sidewall 80 f and the rear sidewall 80 r. Both the sides are aligned in A3 size positions.
- the end wall 81 comes into contact with the trailing end of the sheets P.
- the sheets P that are not aligned during the supply are regulated at the trailing end thereof by the end wall 81 .
- the trailing end is aligned in an A3 size position.
- the sheets P are supplied in a correct paper feeding position of the A3 size.
- a size of the sheet P designated by the user on the control panel 102 is not limited.
- the size may be the B4 size in the JIS standard, the Legal size, the Letter size, or the Ledger size of the US standard, or the like.
- the user selects the upper paper feeding cassette 21 a or the lower paper feeding cassette 21 b on the control panel 102 .
- the user inputs a size of the sheets P fed from the selected paper feeding cassette 21 a or 21 b and determines the change of the size, on the control panel 102 .
- the CPU 110 outputs a signal for storing the sheets P of the changed size in a correct position to the upper input and output terminal 11 a or the lower input and output terminal 11 b.
- the user disconnects the connector 78 a from the input and output terminal 11 a or the input and output terminal 11 b of the apparatus main body 11 and opens the front sidewall 80 f, the rear sidewall 80 r, or the end sidewall 81 to the maximum.
- the present invention is not limited to this.
- the front sidewall 80 f, the rear sidewall 80 r, or the end sidewall 81 may be opened in a range in which the user can easily supply the sheets P.
- the user in supplying the sheets P into the paper feeding cassette 21 a or 21 b, the user draws out the upper paper feeding cassette 21 a or the lower paper feeding cassette 21 b from the apparatus main body 11 . Then, the sidewall motor 86 slides the front sidewall 80 f and the rear sidewall 80 r to the maximum open positions. The end wall motor 90 slides the end wall 81 to the maximum open position.
- the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 is not an obstacle. The user can easily supply the sheets P.
- the sheets P are supplied into the case 78 and the upper paper feeding cassette 21 a or the lower paper feeding cassette 21 b is inserted in the apparatus main body 11 .
- the sidewall motor 86 slides the front sidewall 80 f and the rear sidewall 80 r to positions corresponding to the width of the size designated by the user on the control panel 102 .
- the end wall motor 90 slides the end wall 81 to a position corresponding to the trailing end of the sheets P of the size designated by the user on the control panel 102 .
- the out of alignment of the sheets P that occurs during the supply is corrected by inserting the upper paper feeding cassette 21 a or the lower paper feeding cassette 21 b into the apparatus main body 11 .
- the sheets P can be stored in a correct paper feeding position.
- the paper feeding cassette 21 a or 21 b can feed the sheets P in a proper position. It is possible to easily align the leading end of the sheets P in the position of the registration rollers 16 , prevent a positional shift of an image due to the out of alignment of the sheet P, and improve an image quality.
- the user after supplying the sheets P, the user does not have to operate the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 .
- the user can easily supply the sheets P.
- the user After the supply of the sheets P into the case 78 , the user does not forget to reset the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 to the position for regulating the sheets P. It is possible to prevent a paper jam due to the failure to reset the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 .
- the user can change a size of the sheets P in the paper feeding cassette 21 a or 21 b on the control panel 102 . It is easy to change the size of the sheets P in the paper feeding cassette 21 a or 21 b.
- a copying machine according to a second embodiment of the present invention is explained below.
- a size of sheets stored in the paper feeding cassette in the first embodiment is designated for each of inserting positions in the apparatus main body (e.g., when the paper feeding cassette is inserted into an upper part of the apparatus main body, the size is designated as the A4 landscape size and, when the paper feeding cassette is inserted into a lower part thereof, the size is designated as the A3 size)
- the second embodiment is the same as the first embodiment. Concerning components same as those in the first embodiment, the explanation in the first embodiment applies in the second embodiment.
- the upper input and output terminal 11 a of the apparatus main body 11 is controlled by the CPU 110 and outputs a signal for always storing the sheets P of the A4 landscape size in a correct position.
- the lower input and output terminal 11 b is controlled by the CPU 110 and outputs a signal for always storing the sheets P of the A3 size in a correct position.
- the display panel 102 a displays a message for urging supply of the sheets P.
- the user draws out the upper paper feeding cassette 21 a or the lower paper feeding cassette 21 b from the apparatus main body 11 according to the message.
- the front sidewall 80 f and the rear sidewall 80 r are opened to the maximum positions by the sidewall motor 86 .
- the end wall 81 is opened to the maximum position by the end wall motor 90 .
- the user supplies the sheets P of the A4 size into the case 78 of the upper paper feeding cassette 21 a. Even if some of the sheets P are not aligned in the case 78 , the user directly inserts the upper paper feeding cassette 21 a into the apparatus main body 11 .
- the front sidewall 80 f and the rear sidewall 80 r are slid by the sidewall motor 86 .
- the front sidewall 80 f and the rear sidewall 80 r slide from the maximum open state to the positions for regulating both the ends of the sheets P of the A4-landscape size and stop. Both the sides of the sheets P in the case 78 are aligned in the A4 landscape size positions.
- the end wall 81 is slid by the end wall motor 90 .
- the end wall 81 slides from the maximum open state to the position for regulating the trailing end of the sheets P of the A4 landscape size and stops.
- the trailing end of the sheets P in the case 78 is aligned in the A4 landscape size position.
- the out of alignment of the sheets P is corrected in the upper paper feeding cassette 21 a.
- the sheets P are stored in a state aligned in the correct paper feeding position of the A4 landscape size.
- Supply of the sheets P into the lower paper feeding cassette 21 b is performed in the same manner as the supply of the sheets P into the upper paper feeding cassette 21 a.
- a size of the sheets P designated for each of inserting positions in the apparatus main body 11 is not limited.
- the size of the sheets P for each of the inserting positions in the apparatus main body 11 is changed, for example, during maintenance by a serviceperson.
- An output signal from the upper input and output terminal 11 a or the lower input and output terminal 11 b is changed during the maintenance.
- the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 are open to the maximum.
- the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 is not an obstacle. The user can easily supply the sheets P.
- the out of alignment of the sheets P that occurs during the supply is corrected by inserting the paper feeding cassette 21 a or 21 b into the apparatus main body 11 .
- the sheets P can be stored in a correct paper feeding position.
- the paper feeding cassette 21 a or 21 b can feed the sheets P in a proper position. It is possible to prevent a positional shift of an image due to the out of alignment of the sheet P and improve an image quality.
- the user does not forget to reset the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 to the position for regulating the sheets P. It is possible to prevent a paper jam due to the failure to reset the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 .
- a copying machine according to a third embodiment of the present invention is explained below.
- a size of sheets stored in the paper feeding cassette is detected and the guide member is slid in the first embodiment.
- the third embodiment is the same as the first embodiment.
- the rear sidewall 80 r and the end wall 81 respectively include a side pressure sensor 91 and an end pressure sensor 92 as detecting members on surfaces that come into contact with the sheets P.
- the side pressure sensor 91 or the end pressure sensor 92 detects pressure caused by the contact with the sheets P on the rear sidewall 80 r or the end wall 81 . Detection results of the side pressure sensor 91 and the end pressure sensor 92 are inputted to the CPU 110 from the connector 78 a and the input and output terminals 11 a and 11 b.
- a first photo-sensor 93 a and a second photo-sensor 93 b as detecting members that detect, for example, the rear sidewall 80 r are provided on the bottom surface of the case 78 .
- the first photo-sensor 93 a detects that the rear sidewall 80 r reaches the A4 landscape size position.
- the second photo-sensor 93 b detects that the rear sidewall 80 r reaches the B4 size position.
- Third to fifth photo-sensors 94 a, 94 b, and 94 c as detecting members that detect, for example, the end wall 81 are provided on the bottom surface of the case 78 .
- the third photo-sensor 94 a detects that the end wall 81 reaches the A4 landscape size position.
- the fourth photo-sensor 94 b detects that the end wall 81 reaches the B4 size position.
- the fifth photo-sensor 94 c detects that the end wall 81 reaches the A3 size position.
- Detection results of the first to fifth photo-sensors 93 a, 93 b, 94 a, 94 b, and 94 c are inputted to the CPU 110 from the connector 78 a and the input and output terminals 11 a and 11 b.
- the CPU 110 stores, in a memory 110 a, a pressure ( ⁇ ) caused on the front sidewall 80 f and a pressure ( ⁇ ) caused on the end wall 81 when, for example, the sheets P in 500 sheet units are aligned in the case 78 .
- the memory 110 a stores size of the sheets P correspond to driving times of the sidewall motor 86 , when a detection result (pressure) of the side pressure sensor 91 run to the pressure ( ⁇ ).
- the memory 110 a stores size of the sheets P correspond to driving times of the end wall motor 90 , when a detection result (pressure) of the end pressure sensor 92 run to the pressure ( ⁇ ).
- the display panel 102 a displays a message for urging supply of the sheets P.
- the user draws out the upper paper feeding cassette 21 a or the lower paper feeding cassette 21 b from the apparatus main body 11 according to the message.
- the front sidewall 80 f and the rear sidewall 80 r are opened to the maximum positions by the sidewall motor 86 .
- the end wall 81 is opened to the maximum position by the end wall motor 90 .
- the user supplies 500 pieces of the sheets P of the A4 size into the upper paper feeding cassette 21 a. Even if some of the sheets P are not aligned in the case 78 , the user directly inserts the upper paper feeding cassette 21 a into the apparatus main body 11 .
- the connector 78 a of the case 78 is connected to the upper input and output terminal 11 a of the apparatus main body 11 , the front sidewall 80 f and the rear sidewall 80 r are started to slide by the sidewall motor 86 .
- the rear sidewall 80 r slides in the arrow “m” direction from the maximum open state, the rear sidewall 80 r comes into contact with the sheets P.
- the side pressure sensor 91 inputs a detection result (pressure) caused by the contact with the sheets P to the CPU 110 .
- the CPU 110 detects the driving times of the sidewall motor 86 , when a detection result of the side pressure sensor 91 coincide with the pressure ( ⁇ ).
- the CPU 110 reads a size of sheets correspond to the driving times of the sidewall motor 86 in the memory 110 a.
- the end wall 81 When the user connects the connector 78 a of the case 78 to the upper input and output terminal 11 a of the apparatus main body, the end wall 81 is started to slide by the end wall motor 90 .
- the end wall 81 slides in the arrow “s” direction from the maximum open state, the end wall 81 comes into contact with the trailing end of the sheets P.
- the end pressure sensor 92 inputs a detection result (pressure) caused by the contact with the sheets P to the CPU 110 .
- the CPU 110 detects the driving times of the end wall motor 90 , when a detection result of the end pressure sensor 92 coincide with the pressure ( ⁇ )
- the CPU 110 reads a size of sheets correspond to the driving times of the end wall motor 90 in the memory 110 a.
- the CPU 110 performs matching of the size of the sheets obtained from the detection result of the size pressure sensor 91 and the size of the sheets obtained from the detection result of the end pressure sensor 92 and determines a size of the sheets P supplied into the case 78 .
- the CPU 110 determines that the sheet size is the A4 landscape size
- the CPU 110 stops the sidewall motor 86 according to detection of the rear sidewall 80 r by the first photo-sensor 93 a.
- the CPU 110 stops the end wall motor 90 according to detection of the end wall 81 by the third photo-sensor 94 a.
- the sheets P come into contact with the front sidewall 80 f and the rear sidewall 80 r stopped in a detection position of the first photo-sensor 93 a and the end wall 81 stopped in a detection position of the third photo-sensor 94 a.
- the sheets P are regulated by the front sidewall 80 f, the rear sidewall 80 r, and the end wall 81 , whereby the out of alignment of the sheets P caused during the supply is corrected.
- the sheets P are supplied in a state aligned in the correct paper feeding position of the A4 landscape size in the upper paper feeding cassette 21 a.
- Supply of the sheets P into the lower paper feeding cassette 21 b is performed in the same manner as the supply of the sheets P into the upper paper feeding cassette 21 a.
- a size of the sheets P supplied to the paper feeding cassette 21 a or 21 b is not limited.
- a photo-sensor does not have to be used for detection of a stop position of the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 .
- Driving times to the stop position of the sidewall motor 86 and the end wall motor 90 corresponding to sizes of the sheets P may be set in advance to determine the stop position of the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 .
- a size of the sheets P designated for each of the inserting positions of the apparatus main body 11 is not limited.
- the CPU 110 detects the driving times of the sidewall motor 86 , when a detection result of the side pressure sensor 91 coincide with the pressure ( ⁇ ) or the driving times of the end wall motor 90 , when a detection result of the end pressure sensor 92 coincide with the pressure ( ⁇ ).
- the CPU 110 reads a size of sheets correspond to the driving times of the sidewall motor 86 and the end wall motor 90 .
- the CPU 110 stops the sidewall motor 86 .
- the CPU 110 stops the end wall motor 90 .
- the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 can correct the out of alignment of the sheets P of a size corresponding to the size of the sheets and supply the sheets P into the paper feeding cassette 21 a or 21 b in a state aligned in a correct paper feeding position.
- the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 are open to the maximum.
- the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 is not an obstacle. The user can easily supply the sheets P.
- the out of alignment of the sheets P that occurs during the supply is corrected by inserting the paper feeding cassette 21 a or 21 b into the apparatus main body 11 .
- the sheets P can be stored in a correct paper feeding position.
- the paper feeding cassette 21 a or 21 b can feed the sheets P in a proper position. It is possible to prevent a positional shift of an image due to the out of alignment of the sheet P and improve an image quality.
- the user after the supply of the sheets P, the user does not forget to reset the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 to the position for regulating the sheets P. It is possible to prevent a paper jam due to the failure to reset the front sidewall 80 f, the rear sidewall 80 r, or the end wall 81 .
- the third embodiment it is possible to determine a size of the sheets P supplied into the case 78 using an output of the side pressure sensor 91 and the end pressure sensor 92 .
- the present invention is not limited to the embodiments. Various modifications are possible without departing from the spirit of the present invention.
- the number of paper feeding devices mounted on and removed from the apparatus main body of the image forming apparatus and a size of recording media are not limited.
- a driving source on the apparatus main body side may be used for the driving member that slides the guide member.
- the image forming apparatus may be an image forming apparatus that forms an image on the basis of data from a computer terminal.
- a setting member may be an input unit of the computer terminal.
Abstract
An embodiment of the present invention relates to an image forming apparatus including: a control panel for designating a size of sheets fed by a paper feeding cassette; a sidewall motor that opens a front sidewall and a rear sidewall to the maximum when the paper feeding cassette is drawn out from an apparatus main body and slides the front sidewall and the rear sidewall to both side positions of the sheets of the designated size when the paper feeding cassette is inserted into the apparatus main body; and an end wall motor that opens an end wall to the maximum when the paper feeding cassette is drawn out from the apparatus main body and slides the end wall to a trailing end position of the sheets of the designated size when the paper feeding cassette is inserted into the apparatus main body.
Description
- This application is based upon and claims the benefit of priority from Provisional U.S.
Application 61/026,681 filed on Feb. 6, 2008, the entire contents of which are incorporated herein by reference. - The present invention relates to a paper feeding device for an image forming apparatus that stably feed sheets to an image forming unit of a copying machine or a multi-function peripheral.
- There is a paper feeding cassette mounted on an image forming apparatus to feed sheets to an image forming unit. In this paper feeding cassette, both sides and trailing ends of sheets of various sizes are regulated by guides to prevent a tilt of the sheets.
- In the paper feeding cassette in the past, after supplying sheets, an operator manually moves the guides to regulating positions according to a size of the sheets.
- However, in the apparatus in the past in which the guides are manually moved, after supplying sheets into the paper feeding cassette, in some case, the operator forgets to move the guides or fails to move the guides to accurate regulating positions. When the sheets in the paper feeding cassette are not accurately regulated, the sheets skew when the sheets are taken out from the paper feeding cassette. As a result, it is likely that an image quality is deteriorated and a sheet jam occurs.
- Therefore, there is a demand for a paper feeding device for an image forming apparatus that can surely move, when sheets are set in a paper feeding cassette, guides to regulating positions according to a size of the sheets, prevent the sheets from skewing, prevent a sheet jam from occurring, and realize improvement of an image quality.
- According to an aspect of the present invention, an image quality is improved through improvement of performance for feeding sheets to an apparatus main body and a sheet jam is prevent from occurring.
- According to the aspect, there is provided a paper feeding device for an image forming apparatus including: a housing member that is inserted into and removed from an apparatus main body and stores recording media; a guide member that is slidably provided in the housing member and regulates a feeding position of the recording media to an image forming unit; and a driving member that slides the guide member according to a size of the recording media when the housing member is inserted into the apparatus main body.
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FIG. 1 is a schematic diagram of a copying machine according to a first embodiment of the present invention; -
FIG. 2 is a schematic top view of a paper feeding cassette according to the first embodiment; -
FIG. 3 is a schematic diagram for explaining driving of sidewalls and an end wall of the paper feeding cassette according to the first embodiment; -
FIG. 4 is a schematic top view of stop positions of the sidewalls and the end wall of the paper feeding cassette according to the first embodiment; -
FIG. 5 is a schematic diagram for explaining supply of sheets into the paper feeding cassette according to the first embodiment; and -
FIG. 6 is a schematic top view of a paper feeding cassette according to a third embodiment of the present invention. - A first embodiment of the present invention is explained below.
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FIG. 1 is a schematic diagram of a copying machine 1 as an image forming apparatus according to the first embodiment. The copying machine 1 includes ascanner unit 13 that scans an image, aprinter unit 14 that forms an image, apaper feeding unit 21 as a paper feeding device including an upperpaper feeding cassette 21 a, a lowerpaper feeding cassette 21 b, and alarge capacity cassette 21 c for feeing sheets P as a recording medium, and apaper discharging unit 70 including afirst tray 71 and asecond tray 72 for accumulating the sheets P discharged from theprinter unit 14 as an image forming unit. Acontrol panel 102 as an input unit supported by apole 101 is provided in an apparatusmain body 11 that configures an outer hull of the copying machine 1. A manualpaper feeding unit 23 is provided on a side of the apparatusmain body 11. Aconveying path 40 for the sheets P is provided in a route leading from thepaper feeding unit 21 or the manualpaper feeding unit 23 to thepaper discharging unit 70 through theprinter unit 14 of the copying machine 1. - The
scanner unit 13 scans an object having image information (hereinafter referred to as original document) fed from an auto document feeder (ADF) 35 and capture the image information as image data. After thescanner unit 13 finishes scanning the image information, the ADF 35 discharges the original document to adocument discharging unit 31. - The
printer unit 14 forms, on the sheet P, an image corresponding to inputted image information or the image information scanned by thescanner unit 13. Theprinter unit 14 includesphotoconductive drums 41,charging devices 48 that uniformly charge thephotoconductive drums 41, anexposing device 42 that forms electrostatic latent images on thephotoconductive drums 41, developingdevices 43 that develop the electrostatic latent images formed on thephotoconductive drums 41, and atransfer device 44 that transfers toner images developed on thephotoconductive drums 41 onto the sheets P of arbitrary sizes. Thetransfer device 44 includes atransfer belt 44 a and asecondary transfer roller 44 b. Theprinter unit 14 further includes afixing device 45 that fixes the toner images on the sheet P having the toner images transferred thereon by thetransfer device 44. Thefixing device 45 includes afixing roller 46 and apress roller 47. - The
conveying path 40 includesconveying rollers 24 andregistration rollers 16 for feeding the sheet P taken out from thepaper feeding unit 21 or the manualpaper feeding unit 23 by apickup roller 22 to thetransfer device 44. Theconveying path 40 conveys the sheet P having the fixed toner images to thepaper discharging unit 70 through thetransfer device 44 and thefixing device 45. - The
paper discharging unit 70 includes a paper discharging and conveyingpath 60 that discharges the sheet P to thefirst tray 71 or thesecond tray 72 or reverses the sheet P. The paper discharging and conveyingpath 60 includes alower conveying path 61 and anupper conveying path 62. A first gate 63 divides thelower conveying path 61 and theupper conveying path 62. Thelower conveying path 61 reaches thefirst tray 71 through a firstpaper discharge roller 18. Theupper conveying path 62 includes asecond conveying path 52 on an upper side and athird conveying path 53 on a lower side. Asecond gate 67 divides thesecond conveying path 52 and thethird conveying path 53. - The
second conveying path 52 reaches thesecond tray 72 through a secondpaper discharge roller 19. Thethird conveying path 53 is a reversing and retracting path for the sheet P. Thethird conveying path 53 includes a reversing and conveyingroller 68. When a trailing end of the sheet P conveyed to thethird conveying path 53 passes thefirst gate 66, the reversing and conveyingroller 68 rotates in the opposite direction. The reversing and conveyingroller 68 rotates in the opposite direction to reversely convey the sheet P from thethird conveying path 53 in the direction of a circulating path 50. The circulating path 50 feeds the sheet P to thetransfer device 44 again. - The upper
paper feeding cassette 21 a and the lowerpaper feeding cassette 21 b of thepaper feeding unit 21 have the same structure. As shown inFIG. 2 , each of the upperpaper feeding cassette 21 a and the lowerpaper feeding cassette 21 b includes acase 78 as a housing member that stores the various sheets P and is inserted into and removed from the apparatusmain body 11 and afront sidewall 80 f and arear sidewall 80 r as side guide members that are slidably provided in thecase 78 and regulate both sides of the various sheets P. Further, each of the upperpaper feeding cassette 21 a and the lowerpaper feeding cassette 21 b includes anend wall 81 as an end guide member that is slidably provided in thecase 78 and regulates trailing ends of the various sheets P. Thecase 78 can be drawn out to a front side relative to the apparatusmain body 11. Thecase 78 has on a rear side thereof aconnector 78 a for connecting thecase 78 to an upper input andoutput terminal 11 a or a lower input andoutput terminal 11 b of the apparatusmain body 11 when thecase 78 is inserted into the apparatusmain body 11. A tray-upsheet metal 82 that supports the sheets P is provided on a bottom surface of thecase 78. - The
front sidewall 80 f and therear sidewall 80 r slide in an arrow “m” direction or an arrow “n” direction along aguide shaft 78 b fixed to the bottom surface of thecase 78. Theend wall 81 slides in an arrow “s” direction or an arrow “t” direction along aslit 78 c formed in the bottom surface of thecase 78. - As shown in
FIG. 3 , a front ladder 83 f is provided in thefront sidewall 80 f. Arear ladder 83 r is provided in therear sidewall 80 r. The front ladder 83 f and therear ladder 83 r engage with agear 87 driven by asidewall motor 86. The front ladder 83 f, therear ladder 83 r, thesidewall motor 86, and thegear 87 configure a driving member. When thegear 87 rotates in an arrow “v” direction, thefront sidewall 80 f is slid in the arrow “n” direction by the front ladder 83 f and therear sidewall 80 r is slid in the arrow “m” direction by therear ladder 83 r. When thegear 87 rotates in an arrow “w” direction, thefront sidewall 80 f is slid in the arrow “m” direction by the front ladder 83 f and therear sidewall 80 r is slid in the arrow “n” direction by therear ladder 83 r. - The
end wall 81 is slid by an endwall driving mechanism 84 as a driving member. The endwall driving mechanism 84 includes aconveyor belt 88 that reciprocatingly conveys theend wall 81 and anend wall motor 90 that reciprocatingly rotates theconveyor belt 88. When theconnector 78 a is connected to the input andoutput terminal 11 a or the input andoutput terminal 11 b, thesidewall motor 86 and theend wall motor 90 are connected to aCPU 110 that controls the entire copying machine 1. Thesidewall motor 86 and theend wall motor 90 are controlled to be driven by theCPU 110. - The
paper feeding cassette 21 a or thepaper feeding cassette 21 b is drawn out from the apparatusmain body 11 to disconnect theconnector 78 a from the input andoutput terminal 11 a or the input andoutput terminal 11 b of the apparatusmain body 11. Thesidewall motor 86 drives in the arrow “w” direction to slide thefront sidewall 80 f in the arrow “m” direction and open thefront sidewall 80 f to the maximum and stops thefront sidewall 80 f in a sheet supply position. Further, thesidewall motor 86 slides therear sidewall 80 r in the arrow “n” direction to open therear sidewall 80 r to the maximum and stops therear sidewall 80 r in a sheet supply position. When thefront sidewall 80 f and therear sidewall 80 r are present in the sheet supply positions, a distance between the sidewalls 80 f and 80 r is larger than the width of largest sheets stored in thepaper feeding cassette - When the
connector 78 a is disconnected from the input andoutput terminal 11 a of the apparatusmain body 11, theend wall motor 90 rotates theconveyor belt 88 in the arrow “t” direction and slides theend wall 81 in the arrow “t” direction. Theend wall motor 90 opens theend wall 81 to the maximum and stops theend wall 81 in a sheet supply position on a rear end side of thecase 78. When theend wall 81 is present in the sheet supply position, a distance from adistal end 78 d of thecase 78 to theend wall 81 is larger than the length of the largest sheets stored in thepaper feeding cassette front sidewall 80 f, therear sidewall 80 r, or theend sidewall 81 to the maximum, means the sidewall is opened to a slide limit in thecase 78. - When the
paper feeding cassette main body 11 and theconnector 78 a is connected to the input andoutput terminal 11 a of the apparatusmain body 11, thesidewall motor 86 drives in the arrow “v” direction to close thefront sidewall 80 f and therear sidewall 80 r according to a size of sheets in thepaper feeding cassette sidewall motor 86 reaches the number of revolutions set according to the size of the sheets in thepaper feeding cassette sidewall motor 86 stops the driving. When thesidewall motor 86 stops, the distance between thefront sidewall 80 f and therear sidewall 80 r coincides with the width of the sheets stored in thepaper feeding cassette front sidewall 80 f and therear sidewall 80 r regulate both sides in the width direction of the sheets P in thepaper feeding cassette - When the
connector 78 a is connected to the input andoutput terminal 11 a of the apparatusmain body 11, theend wall motor 90 rotates theconveyor belt 88 in the arrow “s” direction to slide theend wall 81 in the arrow “s” direction and closes theend wall 81 according to the size of the sheets in thepaper feeding cassette end wall motor 90 reaches the number of revolutions set according to the size of the sheets in thepaper feeding cassette end wall motor 90 stops the driving. When theend wall motor 90 stops, theend wall 81 regulates the trailing end of the sheets P in thepaper feeding cassette - The
control panel 102 includes adisplay unit 102 a and akeyboard 102 b. Thecontrol panel 102 has an input function for inputting conditions for image formation by the copying machine 1, start of the image formation, start of image scanning by thescanner unit 13, and the like to theCPU 110. Thecontrol panel 102 has a display function and the like for performing display of a confirmation screen for inputted information and the like and display of a down state and the like of the copying machine 1. Thecontrol panel 102 displays insertion and removal of thepaper feeding cassettes main body 11. A user designates, on thecontrol panel 102, sizes of the sheets P stored in thepaper feeding cassettes - The user designates, on the
control panel 102, a size of the sheets P stored in the upperpaper feeding cassette 21 a as, for example, the A4 landscape size in the JIS standard. TheCPU 110 outputs a signal for storing the sheets P of the A4 landscape size in a correct position to the upper input andoutput terminal 11 a. Thesidewall motor 86 and theend wall motor 90 of the upperpaper feeding cassette 21 a drive, according to the signal from the upper input andoutput terminal 11 a, to store the sheets P of the A4 landscape size in the correct position in thecase 78. The user designates, on thecontrol panel 102, a size of the sheets P stored in the lowerpaper feeding cassette 21 b as, for example, the A3 size in the JIS standard. TheCPU 110 outputs a signal for storing the sheets P of the A3 size in a correct position to the lower input andoutput terminal 11 b. Thesidewall motor 86 and theend wall motor 90 of the lowerpaper feeding cassette 21 b drive, according to the signal from the lower input andoutput terminal 11 b, to store the sheets P of the A3 size in the correct position in thecase 78. - The user instructs, on the
control panel 102, the copying machine 1 to form an image on the sheets P. The upperpaper feeding cassette 21 a stores, for example, the sheets P of the A4 landscape size in the JIS standard as shown inFIG. 4 according to the instruction from thecontrol panel 102. When the upperpaper feeding cassette 21 a is inserted into the apparatus main body 11 (theconnector 78 a is connected to the upper input andoutput terminal 11 a), thesidewall motor 86 drives and thefront sidewall 80 f and therear sidewall 80 r slide to positions for regulating both the sides of the sheets P and stop. Theend wall motor 90 drives and theend wall 81 is slid to a position for regulating the trailing end of the sheets P and stops (indicated by a solid line inFIG. 4 ). The lowerpaper feeding cassette 21 b stores, for example, the sheets P of the A3 size in the JIS standard according to the instruction from thecontrol panel 102. - According to the instruction for image formation, the charging
device 48 charges thephotoconductive drum 41. The exposingdevice 42 outputs image light (exposure light) corresponding to image data that should be formed as an image on the chargedphotoconductive drum 41. The exposingdevice 42 irradiates the exposure light on thephotoconductive drum 41 to form an electrostatic latent image corresponding to the exposure light thereon. The electrostatic latent image formed on thephotoconductive drum 41 is developed with a toner by the developingdevice 43 and visualized. A toner image obtained by visualizing the electrostatic latent image on thephotoconductive drum 41 is transferred onto the sheet P by thetransfer device 44. The sheet P is fed from thepaper feeding unit 21 or the manualpaper feeding unit 23 and conveyed through the conveyingpath 40 and reaches thetransfer device 44. The toner image transferred onto the sheet P is fixed on the sheet P by the fixingdevice 45. The sheet P having the toner image fixed thereon is conveyed to the paper discharging and conveyingpath 60. The sheet P is discharged to thefirst tray 71 or thesecond tray 72 through the paper discharging and conveyingpath 60 or conveyed to thetransfer device 44 again through the circulating path 50. - While the designated image formation is carried out, for example, if the sheets P in the upper
paper feeding cassette 21 a are exhausted, thecontrol panel 102 displays, on thedisplay panel 102 a, a message for urging supply of the sheets P into the upperpaper feeding cassette 21 a. For the supply of the sheets P, the user draws out the upperpaper feeding cassette 21 a from the apparatusmain body 11. When the user draws out the upperpaper feeding cassette 21 a and disconnects theconnector 78 a of thecase 78 from the upper input andoutput terminal 11 a of the apparatusmain body 11, thesidewall motor 86 drives in the arrow “w” direction. Thefront sidewall 80 f slides in the arrow “m” direction to a position indicated by a dotted line inFIG. 4 . Therear sidewall 80 r slides in the arrow “n” direction to a position indicated by a dotted line inFIG. 4 . Thefront sidewall 80 f and therear sidewall 80 r open to maximum positions. Theend wall motor 90 rotates theconveyor belt 88 in the arrow “t” direction. Theend wall 81 slides in the arrow “t” direction to a position indicated by a dotted line inFIG. 4 and opens to a maximum position. - In a state in which the
front sidewall 80 f, therear sidewall 80 r, and theend wall 81 are open to the maximum, the user supplies the sheets P of the A4 size into thecase 78 of the upperpaper feeding cassette 21 a. When the sheets P are supplied into thecase 78, the sheets P may out of alignment as shown inFIG. 5 . Even if some of the sheets P are not aligned, after supplying the sheets P into thecase 78, the user directly inserts the upperpaper feeding cassette 21 a into the apparatusmain body 11. - When the user inserts the upper
paper feeding cassette 21 a into the apparatusmain body 11 and connects theconnector 78 a of thecase 78 to the upper input andoutput terminal 11 a of the apparatus main body, thesidewall motor 86 drives in the arrow “v” direction. Thefront sidewall 80 f and therear sidewall 80 r slide from the maximum open state to positions for regulating both the sides of the sheets P of the A4 landscape size and stops in a position indicated by a solid line inFIG. 4 . The sheets P that are not aligned during the supply into thecase 78 come into contact with thefront sidewall 80 f and therear sidewall 80 r to be regulated on both the sides thereof. Both the sides of the sheets P in thecase 78 are aligned in A4 landscape size positions. - When the user connects the
connector 78 a of thecase 78 to the upper input andoutput terminal 11 a of the apparatusmain body 11, theend wall motor 90 rotates theconveyor belt 88 in the arrow “s” direction. Theend wall 81 slides from the maximum open state to a position for regulating the trailing end of the sheets P of the A4 landscape size and stops in a position indicated by a solid line inFIG. 4 . The sheets P that are not aligned during the supply into thecase 78 come into contact with theend wall 81 to be regulated at the trailing end thereof. The trailing end of the sheets P in thecase 78 is aligned in an A4 landscape size position. The out of alignment of the sheets P is corrected in the upperpaper feeding cassette 21 a. The sheets P are supplied in a state aligned in a correct paper feeding position of the A4 landscape size. - When the user supplies the sheets P into the lower
paper feeding cassette 21 b instructed to store the sheets P of the A3 size, the user supplies the sheets P in the same manner as the supply of the sheets P into the upperpaper feeding cassette 21 a. The user draws out the lowerpaper feeding cassette 21 b from the apparatusmain body 11. When the user disconnects theconnector 78 a of thecase 78 from the lower input andoutput terminal 11 b of the apparatusmain body 11, thesidewall motor 86 is drove to slide thefront sidewall 80 f and therear sidewall 80 r from positions for regulating the sheets P of the A3 size to the maximum open positions. Theend wall motor 90 drives to slide theend wall 81 from a position for regulating the sheets P of the A3 size to the maximum open position. - The user supplies the sheets P of the A3 size into the lower
paper feeding cassette 21 b. After supplying the sheets P, the user inserts the lowerpaper feeding cassette 21 b into the apparatusmain body 11. When the user connects theconnector 78 a of thecase 78 to the lower input andoutput terminal 11 b of the apparatusmain body 11, thesidewall motor 86 is drove. Thefront sidewall 80 f and therear sidewall 80 r slide from the maximum open state to positions for regulating both the ends of the sheets P of the A3 size and stop. Theend wall motor 90 is drove and theend wall 81 slides from the maximum open state to a position for regulating the trailing end of the sheets P of the A3 size and stops. - In a state in which the lower
paper feeding cassette 21 b is inserted in the apparatusmain body 11, thefront sidewall 80 f and therear sidewall 80 r are in contact with both the sides of the sheets P of the A3 size. The sheets P that are not aligned during the supply are regulated on both the sides by thefront sidewall 80 f and therear sidewall 80 r. Both the sides are aligned in A3 size positions. Theend wall 81 comes into contact with the trailing end of the sheets P. The sheets P that are not aligned during the supply are regulated at the trailing end thereof by theend wall 81. The trailing end is aligned in an A3 size position. In the lowerpaper feeding cassette 21 b, the sheets P are supplied in a correct paper feeding position of the A3 size. - In this embodiment, a size of the sheet P designated by the user on the
control panel 102 is not limited. The size may be the B4 size in the JIS standard, the Legal size, the Letter size, or the Ledger size of the US standard, or the like. When the user changes a size of the sheet P in thepaper feeding cassette paper feeding cassette 21 a or the lowerpaper feeding cassette 21 b on thecontrol panel 102. The user inputs a size of the sheets P fed from the selectedpaper feeding cassette control panel 102. According to information inputted on thecontrol panel 102, theCPU 110 outputs a signal for storing the sheets P of the changed size in a correct position to the upper input andoutput terminal 11 a or the lower input andoutput terminal 11 b. - In this embodiment, the user disconnects the
connector 78 a from the input andoutput terminal 11 a or the input andoutput terminal 11 b of the apparatusmain body 11 and opens thefront sidewall 80 f, therear sidewall 80 r, or theend sidewall 81 to the maximum. However, the present invention is not limited to this. Thefront sidewall 80 f, therear sidewall 80 r, or theend sidewall 81 may be opened in a range in which the user can easily supply the sheets P. - According to the first embodiment, in supplying the sheets P into the
paper feeding cassette paper feeding cassette 21 a or the lowerpaper feeding cassette 21 b from the apparatusmain body 11. Then, thesidewall motor 86 slides thefront sidewall 80 f and therear sidewall 80 r to the maximum open positions. Theend wall motor 90 slides theend wall 81 to the maximum open position. When the user supplies the sheets P into thecase 78, thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81 is not an obstacle. The user can easily supply the sheets P. - According to the first embodiment, the sheets P are supplied into the
case 78 and the upperpaper feeding cassette 21 a or the lowerpaper feeding cassette 21 b is inserted in the apparatusmain body 11. Then, thesidewall motor 86 slides thefront sidewall 80 f and therear sidewall 80 r to positions corresponding to the width of the size designated by the user on thecontrol panel 102. Theend wall motor 90 slides theend wall 81 to a position corresponding to the trailing end of the sheets P of the size designated by the user on thecontrol panel 102. The out of alignment of the sheets P that occurs during the supply is corrected by inserting the upperpaper feeding cassette 21 a or the lowerpaper feeding cassette 21 b into the apparatusmain body 11. The sheets P can be stored in a correct paper feeding position. Thepaper feeding cassette registration rollers 16, prevent a positional shift of an image due to the out of alignment of the sheet P, and improve an image quality. - According to the first embodiment, after supplying the sheets P, the user does not have to operate the
front sidewall 80 f, therear sidewall 80 r, or theend wall 81. The user can easily supply the sheets P. After the supply of the sheets P into thecase 78, the user does not forget to reset thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81 to the position for regulating the sheets P. It is possible to prevent a paper jam due to the failure to reset thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81. - According to the first embodiment, the user can change a size of the sheets P in the
paper feeding cassette control panel 102. It is easy to change the size of the sheets P in thepaper feeding cassette - A copying machine according to a second embodiment of the present invention is explained below. In the second embodiment, a size of sheets stored in the paper feeding cassette in the first embodiment is designated for each of inserting positions in the apparatus main body (e.g., when the paper feeding cassette is inserted into an upper part of the apparatus main body, the size is designated as the A4 landscape size and, when the paper feeding cassette is inserted into a lower part thereof, the size is designated as the A3 size) Otherwise, the second embodiment is the same as the first embodiment. Concerning components same as those in the first embodiment, the explanation in the first embodiment applies in the second embodiment.
- In the second embodiment, for example, the upper input and
output terminal 11 a of the apparatusmain body 11 is controlled by theCPU 110 and outputs a signal for always storing the sheets P of the A4 landscape size in a correct position. The lower input andoutput terminal 11 b is controlled by theCPU 110 and outputs a signal for always storing the sheets P of the A3 size in a correct position. - When the sheets P in the upper
paper feeding cassette 21 a or the lowerpaper feeding cassette 21 b are exhausted, for example, thedisplay panel 102 a displays a message for urging supply of the sheets P. To supply the sheets P, the user draws out the upperpaper feeding cassette 21 a or the lowerpaper feeding cassette 21 b from the apparatusmain body 11 according to the message. For example, when the user draws out the upperpaper feeding cassette 21 a and disconnects theconnector 78 a of thecase 78 from the upper input andoutput terminal 11 a of the apparatusmain body 11, thefront sidewall 80 f and therear sidewall 80 r are opened to the maximum positions by thesidewall motor 86. Theend wall 81 is opened to the maximum position by theend wall motor 90. - The user supplies the sheets P of the A4 size into the
case 78 of the upperpaper feeding cassette 21 a. Even if some of the sheets P are not aligned in thecase 78, the user directly inserts the upperpaper feeding cassette 21 a into the apparatusmain body 11. When the user connects theconnector 78 a of thecase 78 to the upper input andoutput terminal 11 a of the apparatus main body, thefront sidewall 80 f and therear sidewall 80 r are slid by thesidewall motor 86. Thefront sidewall 80 f and therear sidewall 80 r slide from the maximum open state to the positions for regulating both the ends of the sheets P of the A4-landscape size and stop. Both the sides of the sheets P in thecase 78 are aligned in the A4 landscape size positions. - The
end wall 81 is slid by theend wall motor 90. Theend wall 81 slides from the maximum open state to the position for regulating the trailing end of the sheets P of the A4 landscape size and stops. The trailing end of the sheets P in thecase 78 is aligned in the A4 landscape size position. The out of alignment of the sheets P is corrected in the upperpaper feeding cassette 21 a. The sheets P are stored in a state aligned in the correct paper feeding position of the A4 landscape size. Supply of the sheets P into the lowerpaper feeding cassette 21 b is performed in the same manner as the supply of the sheets P into the upperpaper feeding cassette 21 a. - In the second embodiment, a size of the sheets P designated for each of inserting positions in the apparatus
main body 11 is not limited. The size of the sheets P for each of the inserting positions in the apparatusmain body 11 is changed, for example, during maintenance by a serviceperson. An output signal from the upper input andoutput terminal 11 a or the lower input andoutput terminal 11 b is changed during the maintenance. - According to the second embodiment, when the user supplies the sheets P into the
case 78, thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81 are open to the maximum. Thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81 is not an obstacle. The user can easily supply the sheets P. - According to the second embodiment, after the supply of the sheets P, the out of alignment of the sheets P that occurs during the supply is corrected by inserting the
paper feeding cassette main body 11. The sheets P can be stored in a correct paper feeding position. Thepaper feeding cassette - According to the second embodiment, after the supply of the sheets P, the user does not forget to reset the
front sidewall 80 f, therear sidewall 80 r, or theend wall 81 to the position for regulating the sheets P. It is possible to prevent a paper jam due to the failure to reset thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81. - A copying machine according to a third embodiment of the present invention is explained below. In the third embodiment, a size of sheets stored in the paper feeding cassette is detected and the guide member is slid in the first embodiment. Otherwise, the third embodiment is the same as the first embodiment. Concerning components same as those in the first embodiment, the explanation in the first embodiment applies in the third embodiment.
- In the third embodiment, as shown in
FIG. 6 , for example, therear sidewall 80 r and theend wall 81 respectively include aside pressure sensor 91 and anend pressure sensor 92 as detecting members on surfaces that come into contact with the sheets P. Theside pressure sensor 91 or theend pressure sensor 92 detects pressure caused by the contact with the sheets P on therear sidewall 80 r or theend wall 81. Detection results of theside pressure sensor 91 and theend pressure sensor 92 are inputted to theCPU 110 from theconnector 78 a and the input andoutput terminals - A first photo-
sensor 93 a and a second photo-sensor 93 b as detecting members that detect, for example, therear sidewall 80 r are provided on the bottom surface of thecase 78. The first photo-sensor 93 a detects that therear sidewall 80 r reaches the A4 landscape size position. The second photo-sensor 93 b detects that therear sidewall 80 r reaches the B4 size position. - Third to fifth photo-
sensors end wall 81 are provided on the bottom surface of thecase 78. The third photo-sensor 94 a detects that theend wall 81 reaches the A4 landscape size position. The fourth photo-sensor 94 b detects that theend wall 81 reaches the B4 size position. The fifth photo-sensor 94 c detects that theend wall 81 reaches the A3 size position. Detection results of the first to fifth photo-sensors CPU 110 from theconnector 78 a and the input andoutput terminals - The
CPU 110 stores, in amemory 110 a, a pressure (α) caused on thefront sidewall 80 f and a pressure (β) caused on theend wall 81 when, for example, the sheets P in 500 sheet units are aligned in thecase 78. Thememory 110 a stores size of the sheets P correspond to driving times of thesidewall motor 86, when a detection result (pressure) of theside pressure sensor 91 run to the pressure (α). Thememory 110 a stores size of the sheets P correspond to driving times of theend wall motor 90, when a detection result (pressure) of theend pressure sensor 92 run to the pressure (β). - When the sheets P in the upper
paper feeding cassette 21 a or the lowerpaper feeding cassette 21 b are exhausted, for example, thedisplay panel 102 a displays a message for urging supply of the sheets P. To supply the sheets P, the user draws out the upperpaper feeding cassette 21 a or the lowerpaper feeding cassette 21 b from the apparatusmain body 11 according to the message. For example, when the user draws out the upperpaper feeding cassette 21 a and disconnects theconnector 78 a of thecase 78 from the upper input andoutput terminal 11 a of the apparatusmain body 11, thefront sidewall 80 f and therear sidewall 80 r are opened to the maximum positions by thesidewall motor 86. Theend wall 81 is opened to the maximum position by theend wall motor 90. - For example, the user supplies 500 pieces of the sheets P of the A4 size into the upper
paper feeding cassette 21 a. Even if some of the sheets P are not aligned in thecase 78, the user directly inserts the upperpaper feeding cassette 21 a into the apparatusmain body 11. When theconnector 78 a of thecase 78 is connected to the upper input andoutput terminal 11 a of the apparatusmain body 11, thefront sidewall 80 f and therear sidewall 80 r are started to slide by thesidewall motor 86. When therear sidewall 80 r slides in the arrow “m” direction from the maximum open state, therear sidewall 80 r comes into contact with the sheets P. Theside pressure sensor 91 inputs a detection result (pressure) caused by the contact with the sheets P to theCPU 110. TheCPU 110 detects the driving times of thesidewall motor 86, when a detection result of theside pressure sensor 91 coincide with the pressure (α). TheCPU 110 reads a size of sheets correspond to the driving times of thesidewall motor 86 in thememory 110 a. - When the user connects the
connector 78 a of thecase 78 to the upper input andoutput terminal 11 a of the apparatus main body, theend wall 81 is started to slide by theend wall motor 90. When theend wall 81 slides in the arrow “s” direction from the maximum open state, theend wall 81 comes into contact with the trailing end of the sheets P. Theend pressure sensor 92 inputs a detection result (pressure) caused by the contact with the sheets P to theCPU 110. TheCPU 110 detects the driving times of theend wall motor 90, when a detection result of theend pressure sensor 92 coincide with the pressure (β) TheCPU 110 reads a size of sheets correspond to the driving times of theend wall motor 90 in thememory 110 a. - The
CPU 110 performs matching of the size of the sheets obtained from the detection result of thesize pressure sensor 91 and the size of the sheets obtained from the detection result of theend pressure sensor 92 and determines a size of the sheets P supplied into thecase 78. When theCPU 110 determines that the sheet size is the A4 landscape size, theCPU 110 stops thesidewall motor 86 according to detection of therear sidewall 80 r by the first photo-sensor 93 a. TheCPU 110 stops theend wall motor 90 according to detection of theend wall 81 by the third photo-sensor 94 a. - In the
case 78, the sheets P come into contact with thefront sidewall 80 f and therear sidewall 80 r stopped in a detection position of the first photo-sensor 93 a and theend wall 81 stopped in a detection position of the third photo-sensor 94 a. The sheets P are regulated by thefront sidewall 80 f, therear sidewall 80 r, and theend wall 81, whereby the out of alignment of the sheets P caused during the supply is corrected. The sheets P are supplied in a state aligned in the correct paper feeding position of the A4 landscape size in the upperpaper feeding cassette 21 a. Supply of the sheets P into the lowerpaper feeding cassette 21 b is performed in the same manner as the supply of the sheets P into the upperpaper feeding cassette 21 a. - In the third embodiment, a size of the sheets P supplied to the
paper feeding cassette - After the size of the sheets P is determined, a photo-sensor does not have to be used for detection of a stop position of the
front sidewall 80 f, therear sidewall 80 r, or theend wall 81. Driving times to the stop position of thesidewall motor 86 and theend wall motor 90 corresponding to sizes of the sheets P may be set in advance to determine the stop position of thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81. - In the third embodiment, a size of the sheets P designated for each of the inserting positions of the apparatus
main body 11 is not limited. When a size of the sheets P supplied into thepaper feeding cassette CPU 110 detects the driving times of thesidewall motor 86, when a detection result of theside pressure sensor 91 coincide with the pressure (α) or the driving times of theend wall motor 90, when a detection result of theend pressure sensor 92 coincide with the pressure (β). TheCPU 110 reads a size of sheets correspond to the driving times of thesidewall motor 86 and theend wall motor 90. - According to a size of sheets, when the first or the second photo-
sensors rear sidewall 80 r reaches the position for regulating the sheets P, theCPU 110 stops thesidewall motor 86. According to a size of sheets, when any one of the third to fifth photo-sensors end wall 81 reaches the position for regulating the sheets P, theCPU 110 stops theend wall motor 90. Thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81 can correct the out of alignment of the sheets P of a size corresponding to the size of the sheets and supply the sheets P into thepaper feeding cassette - According to the third embodiment, when the user supplies the sheets P into the
case 78, thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81 are open to the maximum. Thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81 is not an obstacle. The user can easily supply the sheets P. - According to the third embodiment, after the supply of the sheets P, the out of alignment of the sheets P that occurs during the supply is corrected by inserting the
paper feeding cassette main body 11. The sheets P can be stored in a correct paper feeding position. Thepaper feeding cassette - According to the third embodiment, after the supply of the sheets P, the user does not forget to reset the
front sidewall 80 f, therear sidewall 80 r, or theend wall 81 to the position for regulating the sheets P. It is possible to prevent a paper jam due to the failure to reset thefront sidewall 80 f, therear sidewall 80 r, or theend wall 81. - According to the third embodiment, it is possible to determine a size of the sheets P supplied into the
case 78 using an output of theside pressure sensor 91 and theend pressure sensor 92. - The present invention is not limited to the embodiments. Various modifications are possible without departing from the spirit of the present invention. For example, the number of paper feeding devices mounted on and removed from the apparatus main body of the image forming apparatus and a size of recording media are not limited. A driving source on the apparatus main body side may be used for the driving member that slides the guide member. The image forming apparatus may be an image forming apparatus that forms an image on the basis of data from a computer terminal. A setting member may be an input unit of the computer terminal.
Claims (20)
1. A paper feeding device for an image forming apparatus comprising:
a housing member that is inserted into and removed from an apparatus main body and stores recording media;
a guide member that is slidably provided in the housing member and regulates a feeding position of the recording media to an image forming unit; and
a driving member that slides the guide member according to a size of the recording median when the housing member is inserted into the apparatus main body.
2. The device according to claim 1 , further comprising a detecting member that detects the size of the recording media.
3. The device according to claim 2 , wherein the detecting member includes a pressure sensor that detects pressure to the guide member by the recording media.
4. The device according to claim 2 , wherein the detecting member includes a photo-sensor.
5. The device according to claim 1 , wherein the size of the recording media is set by the apparatus main body.
6. The device according to claim 5 , wherein the size of the recording media is set by data input by from the apparatus main body.
7. The device according to claim 5 , wherein the size of the recording media is set according to an inserting position of the housing member into the apparatus main body.
8. The device according to claim 1 , wherein the driving member slides the guide member to an open position when the housing member is drawn out from the apparatus main body and slides the guide member to the feeding position when the housing member is inserted into the apparatus main body.
9. The device according to claim 1 , wherein the guide member includes a side guide member that regulates a side of the recording media and an end guide member that regulates a trailing end of the recording media, and
the driving member includes a first driving member that drives the side guide member and a second driving member that drives the end guide member.
10. An image forming apparatus comprising:
an apparatus main body including an image forming unit; and
a paper feeding device including a housing member that is inserted into and removed from an apparatus main body and stores recording media to be fed to the image forming unit, a guide member that is slidably provided in the housing member and regulates a feeding position of the recording media to the image forming unit and a driving member that slides the guide member according to a size of the recording media when the housing member is inserted into the apparatus main body.
11. The apparatus according to claim 10 , wherein the paper feeding device further includes a detecting member that detects the size of the recording media.
12. The apparatus according to claim 11 , wherein the detecting member includes a pressure sensor that detects pressure to the guide member by the recording media.
13. The apparatus according to claim 11 , wherein the detecting member includes a photo-sensor.
14. The apparatus according to claim 10 , wherein the apparatus main body further includes a setting member that sets the size of the recording media.
15. The apparatus according to claim 14 , wherein the setting member includes an input unit that inputs the size of the recording media.
16. The apparatus according to claim 14 , wherein the size of the recording media is set according to an inserting position of the paper feeding device into the apparatus main body.
17. The apparatus according to claim 10 , wherein the driving member slides the guide member to an open position when the housing member is drawn out from the apparatus main body and slides the guide member to the feeding position when the housing member is inserted into the apparatus main body.
18. The apparatus according to claim 10 , wherein
the guide member includes a side guide member that regulates a side of the recording media and an end guide member that regulates a trailing end of the recording media, and the driving member includes a first driving member that drives the side guide member and a second driving member that drives the end guide member.
19. A sheet storing method for an image forming apparatus comprising:
sliding a guide member to an open position by drawing out a housing member from an apparatus main body; and
sliding the guide member to a storing position according to a size of a recording media by inserting the housing member into the apparatus main body.
20. The method according to claim 19 , wherein the sliding the guide member to the storing position includes sliding to a storing position at a side of the recording media and sliding to a storing position at a trailing end of the recording media.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/363,414 US20090194934A1 (en) | 2008-02-06 | 2009-01-30 | Paper feeding device for image forming apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2668108P | 2008-02-06 | 2008-02-06 | |
US12/363,414 US20090194934A1 (en) | 2008-02-06 | 2009-01-30 | Paper feeding device for image forming apparatus |
Publications (1)
Publication Number | Publication Date |
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US20090194934A1 true US20090194934A1 (en) | 2009-08-06 |
Family
ID=40930874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/363,414 Abandoned US20090194934A1 (en) | 2008-02-06 | 2009-01-30 | Paper feeding device for image forming apparatus |
Country Status (1)
Country | Link |
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US (1) | US20090194934A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102092594A (en) * | 2009-12-15 | 2011-06-15 | 富士施乐株式会社 | Sheet member feeder device and image forming apparatus |
JP2019031044A (en) * | 2017-08-09 | 2019-02-28 | キヤノン株式会社 | Image forming device |
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US4874160A (en) * | 1986-11-20 | 1989-10-17 | Sharp Kabushiki Kaisha | Paper cartridge with paper aligning means |
US5168317A (en) * | 1988-10-17 | 1992-12-01 | Asahi Kogaku Kogyo Kabushiki Kaisha | Image recording apparatus including record medium edge holder |
US5172903A (en) * | 1990-09-28 | 1992-12-22 | Konica Corporation | Paper feed cassette |
US5573236A (en) * | 1994-08-05 | 1996-11-12 | Xerox Corporation | Variable sheet guide position sensor |
US5689759A (en) * | 1992-08-25 | 1997-11-18 | Canon Kabushiki Kaisha | Copying apparatus and sheet size detecting device adapted for use therein |
US6073925A (en) * | 1996-04-17 | 2000-06-13 | Tohoku Ricoh Co., Ltd. | Image forming apparatus |
US6244585B1 (en) * | 1998-08-07 | 2001-06-12 | Sharp Kabushiki Kaisha | Sheet processing apparatus with switching among plural types of paper |
US6543761B2 (en) * | 1999-02-26 | 2003-04-08 | Tohoku Ricoh Co., Ltd. | Sheet feeding device for an image forming apparatus |
US6619656B2 (en) * | 2002-01-25 | 2003-09-16 | Hewlett-Packard Company, L.P. | Paper tray with automatically adjusting guides |
US20070063425A1 (en) * | 2005-09-22 | 2007-03-22 | Funai Electric Co., Ltd. | Paper feed tray unit for a printer |
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US4874160A (en) * | 1986-11-20 | 1989-10-17 | Sharp Kabushiki Kaisha | Paper cartridge with paper aligning means |
US5168317A (en) * | 1988-10-17 | 1992-12-01 | Asahi Kogaku Kogyo Kabushiki Kaisha | Image recording apparatus including record medium edge holder |
US5172903A (en) * | 1990-09-28 | 1992-12-22 | Konica Corporation | Paper feed cassette |
US5689759A (en) * | 1992-08-25 | 1997-11-18 | Canon Kabushiki Kaisha | Copying apparatus and sheet size detecting device adapted for use therein |
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US6073925A (en) * | 1996-04-17 | 2000-06-13 | Tohoku Ricoh Co., Ltd. | Image forming apparatus |
US6244585B1 (en) * | 1998-08-07 | 2001-06-12 | Sharp Kabushiki Kaisha | Sheet processing apparatus with switching among plural types of paper |
US6543761B2 (en) * | 1999-02-26 | 2003-04-08 | Tohoku Ricoh Co., Ltd. | Sheet feeding device for an image forming apparatus |
US6619656B2 (en) * | 2002-01-25 | 2003-09-16 | Hewlett-Packard Company, L.P. | Paper tray with automatically adjusting guides |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN102092594A (en) * | 2009-12-15 | 2011-06-15 | 富士施乐株式会社 | Sheet member feeder device and image forming apparatus |
JP2019031044A (en) * | 2017-08-09 | 2019-02-28 | キヤノン株式会社 | Image forming device |
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