US20070107174A1 - Methods and apparatus for fastening panels - Google Patents
Methods and apparatus for fastening panels Download PDFInfo
- Publication number
- US20070107174A1 US20070107174A1 US11/281,147 US28114705A US2007107174A1 US 20070107174 A1 US20070107174 A1 US 20070107174A1 US 28114705 A US28114705 A US 28114705A US 2007107174 A1 US2007107174 A1 US 2007107174A1
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- United States
- Prior art keywords
- aperture
- clip
- head
- engagement plate
- panel
- 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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- 238000000034 method Methods 0.000 title claims description 4
- 230000013011 mating Effects 0.000 claims abstract description 39
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
- F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
- F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
- F16B5/0657—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship at least one of the plates providing a raised structure, e.g. of the doghouse type, for connection with the clamps or clips of the other plate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
- B60R13/0206—Arrangements of fasteners and clips specially adapted for attaching inner vehicle liners or mouldings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/06—Releasable fastening devices with snap-action
- F16B21/065—Releasable fastening devices with snap-action with an additional locking element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
- F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
- F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
- F16B5/0664—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship at least one of the sheets or plates having integrally formed or integrally connected snap-in-features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
- B60R13/0237—Side or rear panels
- B60R13/0243—Doors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
- Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
- Y10T24/45602—Receiving member includes either movable connection between interlocking components or variable configuration cavity
- Y10T24/45775—Receiving member includes either movable connection between interlocking components or variable configuration cavity having resiliently biased interlocking component or segment
- Y10T24/45785—Requiring manual force applied against bias to interlock or disengage
Definitions
- the present invention relates to methods and apparatus for fastening panels together, such as for securing a door trim panel to a door module of a vehicle.
- Door trim panels are employed as interior components on automotive vehicles. One of the purposes of such interior trim panels is to present an aesthetically pleasing appearance. Door trim panels are typically mounted to structural support members on the door module. For example, door trim panels are mounted to an inner door sheet metal panel or to a door module (or frame) which replaces the traditional inner door sheet metal of the automotive vehicle.
- the door trim panel includes a socket often referred to as a “doghouse” and the frame includes a pin (e.g., head and shaft) arrangement.
- the pin secures to the frame and may be snap-fit into the doghouse to secure the door trim panel to the frame.
- a plurality of such fasteners are usually employed to secure the door trim panel to the frame.
- the heads of the pins may be preassembled into the respective doghouses. Once a desired number of pins have been secured to the door trim panel via the doghouses, the panel may be secured to the frame by inserting the shaft (or shank) ends of the pins into respective bores formed through the frame.
- the benefit of using the doghouses to secure the pins to the door trim panel is that a blind connection may be made between the panel and frame, i.e., there is no externally visible fastener present in the door trim panel once the connection between the panel and the frame has been made.
- a doghouse 15 includes a wall 16 and an aperture 25 therethrough, the aperture 25 having a generally circular opening with an open edge 27 for lockably receiving a grommet 40 of a pin 60 .
- the doghouse 15 includes inclined surfaces 26 and 28 for camming the grommet 40 into the aperture 25 .
- a pair of resilient arms 30 , 32 extend from a leading edge of the wall 16 toward the aperture 25 .
- the arms 30 , 32 have tips 31 , 33 , respectively, which engage and lock the grommet 40 in place once inserted into the keyed aperture 25 .
- the tips 31 , 33 of arms 30 , 32 respectively, have inclined camming surfaces 34 to assist in deflecting the arms 30 , 32 as the grommet 40 is snap-locked into the aperture 25 .
- the socket 15 may be integrally molded of a polymeric material and integrally formed with the door panel 10 or otherwise suitably attached thereto by ultrasonic welding, adhesive bonding, or the like.
- Another conventional two-piece fastener includes bumps or ridges to achieve the snap-fit connection of the pin and doghouse as opposed to using resilient arms as in U.S. Pat. No. 6,594,870.
- the bumps are disposed around the slot/aperture to retain the grommet in the aperture. While the use of bumps may reduce the depth dimension of the doghouse somewhat, it does not reduce such dimension as much as would be desirable and it increases the likelihood that the pin will disengage from the doghouse.
- a fastener system for attaching e.g., an interior door trim panel to a metal frame of the door (or door module)
- Some or all of the fasteners may each include a shaft with a head sized and shaped to snap-fit into the doghouse.
- the shaft of the fastener may connect to the metal door frame by resistance or interference fit.
- the doghouses are preferably integrally molded with the interior door panel.
- the doghouses may each include an insertion area that slideably receives a head of one of the fasteners, such that it is clipped in.
- the insertion area preferably includes a keyhole-shaped aperture for receiving the head and a clip that is located under the aperture.
- the clip preferably includes a pivotable arm that extends from a first end at a rear of the aperture to a second end terminating toward (and/or forward) of the aperture.
- the clip may include an angle snap at the second end to engage the head of the fastener.
- the doghouse may include one or more guides (or ribs) below the aperture to prevent the head from moving downward through the clip (e.g., longitudinally with respect to the pin).
- the advantages of the embodiments of the invention includes the ability to reduce the depth dimension of the doghouse as compared with some conventional designs without sacrificing retention of the pin in the doghouse.
- the doghouse depth may be reduced at least in part because the clip extends from the first end at a rear of the aperture to the second end terminating toward (and/or forward) of the aperture.
- additional structural footprint need not be employed to accommodate a clip extending from the opposite direction.
- the door panel can be assembled to the door module in two ways: (1) with the shafts of the fasteners already inserted in the door module and the heads of the fasteners elevated somewhat, the door panel is slid into position such that the doghouses slide over the heads and capture them; or (2) with the heads of the fasteners already slid into the doghouses, the door panel is pressed against the door module such that the shafts of the fasteners are inserted into respective bores the door module.
- an apparatus for coupling a panel to a frame includes: a support plate coupled to the panel; an engagement plate extending transversely from the support plate and having an aperture extending therethrough; and a clip having a pivotable arm extending from the support plate at a first end, and at least partially under the aperture to a second end.
- the plate, aperture and clip are preferably sized and shaped to slideably receive a head and shaft of a mating fastener, coupled to the frame, toward the support plate such that the second end of the pivotable arm engages the head when the shaft is fully received in the aperture.
- the support plate may be an integral part of the panel.
- the clip preferably includes an angle snap at the second end thereof, the angle snap being operable to retain the head of the mating fastener after it is received in the aperture.
- the angle snap may include a sloping surface from the second end of the clip toward the engagement plate for slideably engaging the head of the mating fastener and pivoting the clip away from the aperture during insertion thereof toward the support plate.
- the angle snap may include a hook element adjacent to the sloping surface, the hook element being operable to retain the mating fastener within the aperture when the head thereof slides off of the sloping surface toward the support plate and the clip pivots back toward the engagement plate.
- the hook element may include a surface extending transversely from the pivotable arm of the clip substantially toward the engagement plate, the surface of the hook element engaging the head of the mating fastener to retain same in the aperture.
- the engagement plate preferably includes a slot extending from a leading edge thereof to the aperture, the slot including inwardly directed side surfaces operable to guide the head and shaft of the mating fastener toward the support plate and into the aperture.
- the second end of the clip may be positioned proximate to the slot. The second end of the clip may extend short of, at, or past the leading edge of the engagement plate.
- the apparatus may further include at least one guide rib having at least a portion of a surface sloping toward the engagement plate to guide the head and shaft of the mating fastener into the aperture.
- the at least one guide rib may include a respective guide rib disposed on opposite sides of the aperture, each guide rib having at least a portion of a surface sloping toward the engagement plate to guide the head and shaft of the mating fastener into the aperture.
- the guide rib(s) prevent the head from moving downward through the aperture and placing excessive pressure the clip (which might damage the clip and other structures).
- a method for coupling a panel to a frame includes: coupling an engagement plate substantially parallel to the panel, the engagement plate having an aperture extending therethrough which is oriented transversely to the panel, and a slot extending from a leading edge of the engagement plate to the aperture, the slot including inwardly directed side surfaces operable to guide a head and shaft of a mating fastener into the aperture; providing a clip having a pivotable arm extending from a first end at least partially under the aperture and at least toward the leading edge of the engagement plate to a second end; slideably receiving the head and shaft of the mating fastener into the aperture; and preventing the head and shaft of the mating fastener from sliding out of the aperture through the slot using the clip in tension.
- FIG. 1 is a perspective view of a two-piece fastening system for coupling a panel to a frame in accordance with one or more embodiments of the present invention
- FIG. 2 is an elevational view (e.g., side view) of the fastening system of FIG. 1 ;
- FIG. 3 is plan view (e.g., top view) of the fastening system of FIG. 1 ;
- FIG. 4 is a perspective view of a clip of the fastening system of FIG. 1 ;
- FIG. 5 is a sectional view of the fastening system of FIG. 2 taken through line 4 - 4 .
- FIG. 1 a perspective view of a fastening system 100 for connecting a panel 102 to a frame 104 in accordance with one or more embodiments of the present invention.
- the panel 102 and frame 104 may be employed in any number of different mechanical contexts.
- the panel 102 may be a door trim panel 102 for the interior of an automobile and the frame 104 may be the door module 104 of the automobile to which the panel 102 is to be secured.
- the door module 104 preferably represents one or more structural elements of the door of a vehicle and the door trim panel 102 represents an aesthetically pleasing panel that covers the less aesthetically pleasing components of the door module 104 .
- the door trim panel 102 is preferably coupled to the door module 104 by way of one or more fastening systems 100 , one such system 100 being shown for brevity and clarity. In a preferred embodiment, numerous fastening systems 100 would be utilized in different locations to ensure that the door trim panel 102 is securely attached to the door module 104 .
- the fastening system 100 includes a doghouse 106 and a mating fastener (or pin) 108 .
- the doghouse 106 includes a support plate 110 extending transversely (e.g., perpendicularly) from the panel 102 , and an engagement plate 112 extending transversely from the support plate 110 .
- the engagement plate 112 extends substantially perpendicularly from the support plate 110 and substantially parallel with the panel 102 .
- the engagement plate 112 preferably includes an aperture 114 extending therethrough, preferably with its axis oriented transversely with respect to the panel 102 .
- the engagement plate 112 also preferably includes a slot 116 extending from a leading edge 118 of the engagement plate 112 to the aperture 114 .
- the aperture 114 and slot 116 may assume a keyhole shape.
- the slot 116 includes inwardly directed side surfaces 120 , 122 that taper from the leading edge 118 toward the aperture 114 .
- the doghouse 106 is integrally formed of injection moldable plastic material so as to be of a one-piece construction. Most preferably, the doghouse 106 is integrally molded with the panel 102 using suitable polymeric materials.
- the pin 108 may take on any number of features and characteristics known to those skilled in the art, or apparent to those skilled in the art from the description herein.
- the pin 108 may include a shaft 124 that extends through a bore 126 in the door module 104 , e.g., by way of fins 128 .
- the pin 108 preferably includes a head 130 that defines a mating mechanism for the doghouse 106 .
- the head 130 may include a grommet formed by first and second disks 132 , 134 separated by a portion of the shaft 124 .
- the engagement plate 112 , slot 116 , and aperture 114 are sized and shaped to slideably receive the head 130 of the mating fastener 108 and retain same therein in order to securely couple the panel 102 to the door module 104 .
- the fastening system 100 may include further features to accomplish the snap-fit connection of the mating fastener 108 in the doghouse 106 .
- the doghouse 106 may optionally include a clip 140 having a pivotable arm 142 extending from the support plate 110 at a first end 144 .
- the clip 140 preferably extends from the first end 144 at least partially under the aperture 114 to a second end 146 . As best seen in FIG.
- the engagement plate 112 , aperture 114 , and clip 140 are preferably sized and shaped such that the head 130 of the mating fastener 108 slideably enters the doghouse 106 and is retained therein by the second end 146 of the pivotable arm 142 .
- the clip 140 may include an angle snap at the second end 146 thereof, where the angle snap is operable to retain the head 130 of the mating fastener 108 after it is received in the aperture 114 .
- the angle snap may include a sloping surface 148 from the second end 146 of the clip 140 toward the engagement plate 112 .
- the sloping surface 148 is operable to slideably engage the head 108 (e.g., the disk 134 thereof) of the mating fastener 108 and to cause the arm 142 to pivot about the first end 144 and to cause the angle snap of the clip 140 to move away from the engagement plate 112 as the head 130 slides through the slot 116 into the aperture 114 .
- the support plate 110 may optionally include a slot 150 to assist in achieving the pivotable action of the clip 140 .
- the slot 150 provides relief to the first end 144 of the pivotable arm 142 such that the torsional forces generated at the first end 144 of the arm 142 in response to the engagement of the head 130 with the sloping surface 148 may be distributed along a portion 152 of the support plate 110 .
- the length of the portion 152 may be adjusted from zero to some maximum length depending on desired amounts of flexibility and of distribution of the torsional forces desired by the designer.
- the clip 140 may include an undercut 154 (shown in dashed lines) at the first end 144 of the pivotable arm 142 to assist in pivotable movement of the clip 140 .
- Alternative embodiments of the invention may omit the slot 150 and the clip may depend from the support plate 100 directly as a simple lever arm.
- the clip 140 preferably includes a hook element 160 adjacent to the sloping surface 148 .
- the hook element 160 is preferably operable to retain the head 130 of the mating fastener 108 within the aperture 114 when the head 130 slides off the sloping surface 148 toward the support plate 110 and the clip 140 pivots back toward the engagement plate 112 .
- the hook element 160 preferably includes a surface 162 extending transversely from an upper surface 164 of the pivotable arm 142 and toward the engagement plate 112 .
- the surfaces 162 , 164 of the clip 140 preferably retain the head 130 of the mating fastener 108 (e.g., the disk 134 thereof) from moving downward (vis-à-vis surface 164 ) or out through the slot 116 (vis-à-vis surface 162 ). Indeed, once the clip 140 pivots back into its resting position, the disk 134 is preferably trapped against a lower surface of the engagement plate 112 on the one hand, and by the surfaces 162 , 164 on the other hand.
- the second end 146 of the clip 140 is positioned proximate to the slot 116 .
- the second end 146 of the clip 140 may terminate short of the leading edge 118 of the engagement plate 112 , at the leading edge 118 , or past the leading edge 118 .
- the sloping surface 148 and the side edges 120 , 122 preferably define a conical guide feature that guides the head 130 of the mating fastening 108 into the aperture 114 .
- the aperture is preferably slightly larger than the shaft 124 portion of the head 130 to assist in ensuring that the head 130 may engage the doghouse.
- the aperture 114 also includes a tapered edge 166 , such as at a 5 degree angle for tooling and ease of manufacturing purposes.
- the panel 102 can be assembled to the door module 104 in a number of ways, such as: (1) with the shafts 124 of the fasteners 108 already inserted in the door module 104 and the heads 130 of the fasteners 108 elevated somewhat, the door panel 102 is slid into position such that the doghouses 106 slide over the heads 130 and capture them; or (2) with the heads 130 of the fasteners 108 already slid into the doghouses 106 , the panel 102 is pressed against the door module 104 such that the shafts 124 of the fasteners 108 are inserted into respective bores 126 the door module 104 .
- the doghouse 106 may also include at least one guide rib 170 having at least a portion 172 thereof sloping toward the engagement plate 112 to guide the head 130 of the mating fastener 108 into the aperture 114 .
- a first guide rib 170 and a second guide rib 174 are disposed on opposite sides of the aperture 114 , where each guide rib includes a surface that at least partially slopes toward the engagement plate 112 .
- the guide ribs 170 , 174 assist in guiding the head 130 into the doghouse 106 as well as preventing the mating fastener 108 from moving downward (e.g., longitudinally with respect to the shaft 124 direction) into the doghouse 106 and potentially damaging same.
- the clip 140 permits serviceability of the panel 102 , e.g., the panel 102 may be disconnected from the frame 104 numerous times without damaging the doghouse 106 or the fastener 108 .
- Another advantage of the design of the clip 140 is the ability to reduce the depth dimension of the doghouse 106 as compared with some conventional designs without sacrificing retention of the mating fastener 108 in the doghouse 106 . Further advantages include improved guiding of the head 108 into the doghouse, for example, resulting from employing one or more of the features of the clip 140 , the slot 116 and the rib(s) 170 , 174 .
Abstract
An apparatus for coupling a panel to a frame includes: a support plate coupled to the panel; an engagement plate extending transversely from the support plate and having an aperture extending therethrough; and a clip having a pivotable arm extending from the support plate at a first end, and at least partially under the aperture to a second end, wherein the plate, aperture and clip are sized and shaped to slideably receive a head and shaft of a mating fastener, coupled to the frame, toward the support plate such that the second end of the pivotable arm engages the head when the shaft is fully received in the aperture.
Description
- The present invention relates to methods and apparatus for fastening panels together, such as for securing a door trim panel to a door module of a vehicle.
- Door trim panels are employed as interior components on automotive vehicles. One of the purposes of such interior trim panels is to present an aesthetically pleasing appearance. Door trim panels are typically mounted to structural support members on the door module. For example, door trim panels are mounted to an inner door sheet metal panel or to a door module (or frame) which replaces the traditional inner door sheet metal of the automotive vehicle.
- There exist a variety of conventional fasteners for attaching panels to support members in the automotive industry. A common problem with assembling such panels has been that the fasteners are difficult to align with mating fasteners in the sheet metal of the frame. As a result, misaligned fasteners sometimes result in a mallet being employed to attach the door panel to the frame, often resulting in the fracture the fastener. Additionally, poor fastener design will subject the fasteners to overstressing during assembly or use (i.e., shutting door) and may cause the fastener to break or fatigue or otherwise result in a loss in retention strength for holding the door trim panel in place. As a result, some conventional door trim panels frequently become loose.
- Many conventional fasteners are of two-piece construction: the door trim panel includes a socket often referred to as a “doghouse” and the frame includes a pin (e.g., head and shaft) arrangement. The pin secures to the frame and may be snap-fit into the doghouse to secure the door trim panel to the frame. A plurality of such fasteners are usually employed to secure the door trim panel to the frame. The heads of the pins may be preassembled into the respective doghouses. Once a desired number of pins have been secured to the door trim panel via the doghouses, the panel may be secured to the frame by inserting the shaft (or shank) ends of the pins into respective bores formed through the frame. The benefit of using the doghouses to secure the pins to the door trim panel is that a blind connection may be made between the panel and frame, i.e., there is no externally visible fastener present in the door trim panel once the connection between the panel and the frame has been made.
- Of significant concern in a two-piece fastener design are the degree to which the pins are easily aligned and inserted into the doghouses, and the degree to which the pins are retained in the doghouses once snapped in.
- U.S. Pat. No. 6,594,870 discloses a conventional two-piece fastener for coupling a door trim panel to a frame, the entire disclosure of which is hereby incorporated by reference. A doghouse 15 includes a wall 16 and an aperture 25 therethrough, the aperture 25 having a generally circular opening with an open edge 27 for lockably receiving a grommet 40 of a pin 60. The doghouse 15 includes inclined surfaces 26 and 28 for camming the grommet 40 into the aperture 25. A pair of resilient arms 30, 32 extend from a leading edge of the wall 16 toward the aperture 25. The arms 30, 32 have tips 31, 33, respectively, which engage and lock the grommet 40 in place once inserted into the keyed aperture 25. The tips 31, 33 of arms 30, 32, respectively, have inclined camming surfaces 34 to assist in deflecting the arms 30, 32 as the grommet 40 is snap-locked into the aperture 25. The socket 15 may be integrally molded of a polymeric material and integrally formed with the door panel 10 or otherwise suitably attached thereto by ultrasonic welding, adhesive bonding, or the like.
- Among the problems that the inventors herein have discovered with the doghouse design employed in U.S. Pat. No. 6,594,870 and by others is that an overall depth dimension of the doghouse must be relatively large to accommodate the resilient arm(s), e.g. the arms 30, 32 of U.S. Pat. No. 6,594,870 that extend from the leading edge of the wall 16 toward the aperture 25.
- Another conventional two-piece fastener includes bumps or ridges to achieve the snap-fit connection of the pin and doghouse as opposed to using resilient arms as in U.S. Pat. No. 6,594,870. The bumps are disposed around the slot/aperture to retain the grommet in the aperture. While the use of bumps may reduce the depth dimension of the doghouse somewhat, it does not reduce such dimension as much as would be desirable and it increases the likelihood that the pin will disengage from the doghouse.
- As a result of all the difficulties with existing fasteners for attaching, e.g., vehicle trim panels to vehicle sheet metal, and particularly door panels to the sheet metal structure of a door, warranty claims for loose panels and broken fasteners are one of the major concerns in the automotive interior trim field.
- Thus, there are needs in the art for a new approach to securing a panel to a frame, preferably which reduces the depth dimension of the doghouse and/or improves the ability of the pin to remain locked in the doghouse.
- In accordance with one or more embodiments of the present invention, a fastener system for attaching, e.g., an interior door trim panel to a metal frame of the door (or door module), may include a plurality of fasteners (or pins) and doghouses. Some or all of the fasteners may each include a shaft with a head sized and shaped to snap-fit into the doghouse. The shaft of the fastener may connect to the metal door frame by resistance or interference fit. The doghouses are preferably integrally molded with the interior door panel. The doghouses may each include an insertion area that slideably receives a head of one of the fasteners, such that it is clipped in. The insertion area preferably includes a keyhole-shaped aperture for receiving the head and a clip that is located under the aperture. More specifically, the clip preferably includes a pivotable arm that extends from a first end at a rear of the aperture to a second end terminating toward (and/or forward) of the aperture. The clip may include an angle snap at the second end to engage the head of the fastener. The doghouse may include one or more guides (or ribs) below the aperture to prevent the head from moving downward through the clip (e.g., longitudinally with respect to the pin).
- Among the advantages of the embodiments of the invention includes the ability to reduce the depth dimension of the doghouse as compared with some conventional designs without sacrificing retention of the pin in the doghouse. In particular, the doghouse depth may be reduced at least in part because the clip extends from the first end at a rear of the aperture to the second end terminating toward (and/or forward) of the aperture. Thus, additional structural footprint need not be employed to accommodate a clip extending from the opposite direction.
- The door panel can be assembled to the door module in two ways: (1) with the shafts of the fasteners already inserted in the door module and the heads of the fasteners elevated somewhat, the door panel is slid into position such that the doghouses slide over the heads and capture them; or (2) with the heads of the fasteners already slid into the doghouses, the door panel is pressed against the door module such that the shafts of the fasteners are inserted into respective bores the door module.
- In accordance with one or more aspects of the present invention, an apparatus for coupling a panel to a frame includes: a support plate coupled to the panel; an engagement plate extending transversely from the support plate and having an aperture extending therethrough; and a clip having a pivotable arm extending from the support plate at a first end, and at least partially under the aperture to a second end. The plate, aperture and clip are preferably sized and shaped to slideably receive a head and shaft of a mating fastener, coupled to the frame, toward the support plate such that the second end of the pivotable arm engages the head when the shaft is fully received in the aperture. It is noted that in some embodiments, the support plate may be an integral part of the panel.
- The clip preferably includes an angle snap at the second end thereof, the angle snap being operable to retain the head of the mating fastener after it is received in the aperture. For example, the angle snap may include a sloping surface from the second end of the clip toward the engagement plate for slideably engaging the head of the mating fastener and pivoting the clip away from the aperture during insertion thereof toward the support plate. Alternatively or in addition, the angle snap may include a hook element adjacent to the sloping surface, the hook element being operable to retain the mating fastener within the aperture when the head thereof slides off of the sloping surface toward the support plate and the clip pivots back toward the engagement plate. For example, the hook element may include a surface extending transversely from the pivotable arm of the clip substantially toward the engagement plate, the surface of the hook element engaging the head of the mating fastener to retain same in the aperture.
- The engagement plate preferably includes a slot extending from a leading edge thereof to the aperture, the slot including inwardly directed side surfaces operable to guide the head and shaft of the mating fastener toward the support plate and into the aperture. The second end of the clip may be positioned proximate to the slot. The second end of the clip may extend short of, at, or past the leading edge of the engagement plate.
- The apparatus may further include at least one guide rib having at least a portion of a surface sloping toward the engagement plate to guide the head and shaft of the mating fastener into the aperture. For example, the at least one guide rib may include a respective guide rib disposed on opposite sides of the aperture, each guide rib having at least a portion of a surface sloping toward the engagement plate to guide the head and shaft of the mating fastener into the aperture. The guide rib(s) prevent the head from moving downward through the aperture and placing excessive pressure the clip (which might damage the clip and other structures).
- In accordance with one or more aspects of the present invention, a method for coupling a panel to a frame includes: coupling an engagement plate substantially parallel to the panel, the engagement plate having an aperture extending therethrough which is oriented transversely to the panel, and a slot extending from a leading edge of the engagement plate to the aperture, the slot including inwardly directed side surfaces operable to guide a head and shaft of a mating fastener into the aperture; providing a clip having a pivotable arm extending from a first end at least partially under the aperture and at least toward the leading edge of the engagement plate to a second end; slideably receiving the head and shaft of the mating fastener into the aperture; and preventing the head and shaft of the mating fastener from sliding out of the aperture through the slot using the clip in tension.
- Other aspects, features, advantages, etc. will become apparent to one skilled in the art when the description of the preferred embodiments of the invention herein is taken in conjunction with the accompanying drawings.
- For the purposes of illustrating the various aspects of the invention, there are shown in the drawings forms that are presently preferred, it being understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown.
-
FIG. 1 is a perspective view of a two-piece fastening system for coupling a panel to a frame in accordance with one or more embodiments of the present invention; -
FIG. 2 is an elevational view (e.g., side view) of the fastening system ofFIG. 1 ; -
FIG. 3 is plan view (e.g., top view) of the fastening system ofFIG. 1 ; -
FIG. 4 is a perspective view of a clip of the fastening system ofFIG. 1 ; and -
FIG. 5 is a sectional view of the fastening system ofFIG. 2 taken through line 4-4. - With reference to the drawings, wherein like numerals indicate like elements, there is shown in
FIG. 1 a perspective view of afastening system 100 for connecting apanel 102 to aframe 104 in accordance with one or more embodiments of the present invention. It will be appreciated by those skilled in the art that thepanel 102 andframe 104 may be employed in any number of different mechanical contexts. By way of example, and not by limitation, thepanel 102 may be a doortrim panel 102 for the interior of an automobile and theframe 104 may be thedoor module 104 of the automobile to which thepanel 102 is to be secured. Thedoor module 104 preferably represents one or more structural elements of the door of a vehicle and the doortrim panel 102 represents an aesthetically pleasing panel that covers the less aesthetically pleasing components of thedoor module 104. The doortrim panel 102 is preferably coupled to thedoor module 104 by way of one ormore fastening systems 100, onesuch system 100 being shown for brevity and clarity. In a preferred embodiment,numerous fastening systems 100 would be utilized in different locations to ensure that the doortrim panel 102 is securely attached to thedoor module 104. - The
fastening system 100 includes a doghouse 106 and a mating fastener (or pin) 108. Thedoghouse 106 includes asupport plate 110 extending transversely (e.g., perpendicularly) from thepanel 102, and anengagement plate 112 extending transversely from thesupport plate 110. Although not required, it is preferred that theengagement plate 112 extends substantially perpendicularly from thesupport plate 110 and substantially parallel with thepanel 102. Theengagement plate 112 preferably includes anaperture 114 extending therethrough, preferably with its axis oriented transversely with respect to thepanel 102. Theengagement plate 112 also preferably includes aslot 116 extending from aleading edge 118 of theengagement plate 112 to theaperture 114. In this regard, although not required theaperture 114 andslot 116 may assume a keyhole shape. Preferably, theslot 116 includes inwardly directedside surfaces leading edge 118 toward theaperture 114. - Preferably, the
doghouse 106 is integrally formed of injection moldable plastic material so as to be of a one-piece construction. Most preferably, thedoghouse 106 is integrally molded with thepanel 102 using suitable polymeric materials. - Although the
pin 108 may take on any number of features and characteristics known to those skilled in the art, or apparent to those skilled in the art from the description herein. By way of example, thepin 108 may include ashaft 124 that extends through abore 126 in thedoor module 104, e.g., by way offins 128. At a distal end of theshaft 124, thepin 108 preferably includes ahead 130 that defines a mating mechanism for thedoghouse 106. For example, thehead 130 may include a grommet formed by first andsecond disks shaft 124. - Preferably, the
engagement plate 112,slot 116, andaperture 114 are sized and shaped to slideably receive thehead 130 of themating fastener 108 and retain same therein in order to securely couple thepanel 102 to thedoor module 104. - In accordance with one or more embodiments of the invention, the
fastening system 100 may include further features to accomplish the snap-fit connection of themating fastener 108 in thedoghouse 106. In this regard, reference will now be made toFIGS. 2-5 . For example, the doghouse 106 may optionally include aclip 140 having apivotable arm 142 extending from thesupport plate 110 at afirst end 144. Theclip 140 preferably extends from thefirst end 144 at least partially under theaperture 114 to asecond end 146. As best seen inFIG. 5 , theengagement plate 112,aperture 114, and clip 140 are preferably sized and shaped such that thehead 130 of themating fastener 108 slideably enters the doghouse 106 and is retained therein by thesecond end 146 of thepivotable arm 142. - By way of example, the
clip 140 may include an angle snap at thesecond end 146 thereof, where the angle snap is operable to retain thehead 130 of themating fastener 108 after it is received in theaperture 114. More particularly, the angle snap may include asloping surface 148 from thesecond end 146 of theclip 140 toward theengagement plate 112. Thesloping surface 148 is operable to slideably engage the head 108 (e.g., thedisk 134 thereof) of themating fastener 108 and to cause thearm 142 to pivot about thefirst end 144 and to cause the angle snap of theclip 140 to move away from theengagement plate 112 as thehead 130 slides through theslot 116 into theaperture 114. - As best seen in
FIGS. 2-4 , thesupport plate 110 may optionally include aslot 150 to assist in achieving the pivotable action of theclip 140. In particular, theslot 150 provides relief to thefirst end 144 of thepivotable arm 142 such that the torsional forces generated at thefirst end 144 of thearm 142 in response to the engagement of thehead 130 with thesloping surface 148 may be distributed along aportion 152 of thesupport plate 110. Those skilled in the art will appreciate that the length of theportion 152 may be adjusted from zero to some maximum length depending on desired amounts of flexibility and of distribution of the torsional forces desired by the designer. Alternatively and/or in addition, theclip 140 may include an undercut 154 (shown in dashed lines) at thefirst end 144 of thepivotable arm 142 to assist in pivotable movement of theclip 140. Alternative embodiments of the invention may omit theslot 150 and the clip may depend from thesupport plate 100 directly as a simple lever arm. - The
clip 140 preferably includes a hook element 160 adjacent to thesloping surface 148. The hook element 160 is preferably operable to retain thehead 130 of themating fastener 108 within theaperture 114 when thehead 130 slides off thesloping surface 148 toward thesupport plate 110 and theclip 140 pivots back toward theengagement plate 112. In this regard, the hook element 160 preferably includes asurface 162 extending transversely from anupper surface 164 of thepivotable arm 142 and toward theengagement plate 112. Thus, thesurfaces clip 140 preferably retain thehead 130 of the mating fastener 108 (e.g., thedisk 134 thereof) from moving downward (vis-à-vis surface 164) or out through the slot 116 (vis-à-vis surface 162). Indeed, once theclip 140 pivots back into its resting position, thedisk 134 is preferably trapped against a lower surface of theengagement plate 112 on the one hand, and by thesurfaces - Preferably, the
second end 146 of theclip 140 is positioned proximate to theslot 116. Indeed, those skilled in the art will appreciate that thesecond end 146 of theclip 140 may terminate short of theleading edge 118 of theengagement plate 112, at theleading edge 118, or past theleading edge 118. - As best seen in
FIG. 2 , the slopingsurface 148 and the side edges 120, 122 preferably define a conical guide feature that guides thehead 130 of themating fastening 108 into theaperture 114. The aperture is preferably slightly larger than theshaft 124 portion of thehead 130 to assist in ensuring that thehead 130 may engage the doghouse. In a preferred embodiment, theaperture 114 also includes atapered edge 166, such as at a 5 degree angle for tooling and ease of manufacturing purposes. - The
panel 102 can be assembled to thedoor module 104 in a number of ways, such as: (1) with theshafts 124 of thefasteners 108 already inserted in thedoor module 104 and theheads 130 of thefasteners 108 elevated somewhat, thedoor panel 102 is slid into position such that thedoghouses 106 slide over theheads 130 and capture them; or (2) with theheads 130 of thefasteners 108 already slid into thedoghouses 106, thepanel 102 is pressed against thedoor module 104 such that theshafts 124 of thefasteners 108 are inserted intorespective bores 126 thedoor module 104. - The doghouse 106 may also include at least one
guide rib 170 having at least aportion 172 thereof sloping toward theengagement plate 112 to guide thehead 130 of themating fastener 108 into theaperture 114. In a preferred embodiment, afirst guide rib 170 and asecond guide rib 174 are disposed on opposite sides of theaperture 114, where each guide rib includes a surface that at least partially slopes toward theengagement plate 112. Advantageously, theguide ribs head 130 into the doghouse 106 as well as preventing themating fastener 108 from moving downward (e.g., longitudinally with respect to theshaft 124 direction) into thedoghouse 106 and potentially damaging same. - Advantageously, the
clip 140 permits serviceability of thepanel 102, e.g., thepanel 102 may be disconnected from theframe 104 numerous times without damaging the doghouse 106 or thefastener 108. Another advantage of the design of theclip 140 is the ability to reduce the depth dimension of the doghouse 106 as compared with some conventional designs without sacrificing retention of themating fastener 108 in thedoghouse 106. Further advantages include improved guiding of thehead 108 into the doghouse, for example, resulting from employing one or more of the features of theclip 140, theslot 116 and the rib(s) 170, 174. - Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (15)
1. A fastening element for coupling a panel to a frame, comprising:
a support plate coupled to the panel;
an engagement plate extending transversely from the support plate and having an aperture extending therethrough; and
a clip having a pivotable arm extending from the support plate at a first end, and at least partially under the aperture to a second end,
wherein the plate, aperture and clip are sized and shaped to slideably receive a head and shaft of a mating fastener, coupled to the frame, toward the support plate such that the second end of the pivotable arm engages the head when the shaft is fully received in the aperture.
2. The fastening element of claim 1 , wherein the clip includes an angle snap at the second end thereof, the angle snap being operable to retain the head of the mating fastener after it is received in the aperture.
3. The fastening element of claim 2 , wherein the angle snap includes a sloping surface from the second end of the clip toward the engagement plate for slideably engaging the head of the mating fastener and pivoting the clip away from the aperture during insertion thereof toward the support plate.
4. The fastening element of claim 3 , wherein the angle snap includes a hook element adjacent to the sloping surface, the hook element being operable to retain the mating fastener within the aperture when the head thereof slides off of the sloping surface toward the support plate and the clip pivots back toward the engagement plate.
5. The fastening element of claim 4 , wherein the hook element includes a surface extending transversely from the pivotable arm of the clip substantially toward the engagement plate, the surface of the hook element engaging the head of the mating fastener to retain same in the aperture.
6. The fastening element of claim 1 , wherein engagement plate includes a slot extending from a leading edge thereof to the aperture, the slot including inwardly directed side surfaces operable to guide the head and shaft of the mating fastener toward the support plate and into the aperture.
7. The fastening element of claim 6 , wherein the second end of the clip is positioned proximate to the slot.
8. The fastening element of claim 7 , wherein the second end of the clip extends past the leading edge of the engagement plate.
9. The fastening element of claim 7 , wherein:
the clip includes a sloping surface from the second end of the clip toward the engagement plate for slideably engaging the head of the mating fastener and pivoting the clip away from the engagement plate during insertion thereof toward the support plate; and
the sloping surface of the clip and the inwardly directed side surfaces of the slot define a conical guide feature that guides the head and shaft of the mating fastener into the aperture.
10. The fastening element of claim 9 , wherein an apex of the conical guide feature is positioned opposite the leading edge of the engagement surface.
11. The fastening element of claim 1 , further comprising at least one guide rib positioned laterally with respect to the clip to prevent the head from applying excessive pressure on the clip.
12. The fastening element of claim 11 , wherein at least one of:
the at least one guide rib includes a respective guide rib disposed on opposite sides of the aperture; and
each guide rib includes at least a portion of a surface sloping toward the engagement plate to guide the head and shaft of the mating fastener into the aperture.
13. The fastening element of claim 11 , wherein the support plate is an integral part of the panel.
14. A fastening element for coupling a panel to a frame, comprising:
an engagement plate coupled to, and extending substantially parallel to, the panel, the engagement plate having an aperture extending therethrough which is oriented transversely to the panel, and a slot extending from a leading edge of the engagement plate to the aperture; and
at least one guide rib disposed below the engagement plate and having at least a portion of a surface sloping toward the engagement plate to guide a head and shaft of a mating fastener into the aperture.
15. A method of fastening a panel to a frame, comprising:
coupling an engagement plate substantially parallel to the panel, the engagement plate having an aperture extending therethrough which is oriented transversely to the panel, and a slot extending from a leading edge of the engagement plate to the aperture, the slot including inwardly directed side surfaces operable to guide a head and shaft of a mating fastener, of the frame, into the aperture;
providing a clip having a pivotable arm extending from a first end at least partially under the aperture and at least toward the leading edge of the engagement plate to a second end;
slideably receiving the head and shaft of the mating fastener into the aperture; and
preventing the head and shaft of the mating fastener from sliding out of the aperture through the slot using the clip in tension.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/281,147 US20070107174A1 (en) | 2005-11-17 | 2005-11-17 | Methods and apparatus for fastening panels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/281,147 US20070107174A1 (en) | 2005-11-17 | 2005-11-17 | Methods and apparatus for fastening panels |
Publications (1)
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US20070107174A1 true US20070107174A1 (en) | 2007-05-17 |
Family
ID=38039224
Family Applications (1)
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US11/281,147 Abandoned US20070107174A1 (en) | 2005-11-17 | 2005-11-17 | Methods and apparatus for fastening panels |
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US (1) | US20070107174A1 (en) |
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Legal Events
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AS | Assignment |
Owner name: FAURECIA INTERIOR SYSTEMS U.S.A., INC.,MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BORDAS, STEPHANE S. L.;REEL/FRAME:017250/0705 Effective date: 20051117 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |