WO2005075319A1

WO2005075319A1 - Heat insulating container

Info

Publication number: WO2005075319A1
Application number: PCT/JP2004/019266
Authority: WO
Inventors: Kaoru Takeo; Ryusuke Sakai
Original assignee: Fuji Seal International, Inc.
Priority date: 2004-02-10
Filing date: 2004-12-22
Publication date: 2005-08-18
Also published as: US20080314909A1; EP1714912A4; DE602004026642D1; EP1714912A1; EP1714912B1

Abstract

A heat insulating container enabling a reduction in man-hour and materials in production while sufficiently securing the strength of an external body on its bottom side. The container comprises a bottomed cylindrical container body (1) and the external body (2) formed of a foam resin sheet (S) with thermal shrinkage properties and covering the peripheral wall (10) of the container body (1) to form a space (40) between the peripheral wall (10) and the external body (2). The external body (2) comprises a tubular part (20) opposed to the peripheral wall (10) of the container body (1) and an annular part (21) extended from the bottom opening edge part, as a base end, in the tubular part (20). The annular part (21) is characterized in that the tip side thereof is apart from the inner peripheral surface of the tubular part (20) more than the base end part side thereof.

Description

Specification

Insulated container

Technical field

[0001] The present invention provides a container having a bottomed cylindrical shape for housing a container such as a high-temperature food or beverage, which is covered with an exterior body, and forms a space between the exterior body and a peripheral wall of the container body. The present invention relates to a heat insulating container configured to obtain a heat insulating effect.

Background art

[0002] Conventionally, various insulated containers have been provided as containers for storing instant foods such as soups and the like, which are poured and consumed with boiling water, and separately heated beverages.

[0003] Such an insulated container includes a container body 100 formed into a bottomed cylindrical shape as shown in FIG. 14, and an exterior body 150 covering a peripheral wall 101 of the container body 100. A space 200 is formed between the housing 150 and the exterior body 150, and the heat of the contents P housed in the container body 100 is transmitted to the exterior body 150 through the space 200.

[0004] The exterior body 150 extends from the lower end of the cylindrical portion 151 to the center of the cylindrical portion 151 with the lower end of the cylindrical portion 151 facing the peripheral wall 101 of the container body 100. A horizontal annular portion 152 is provided.

[0005] The exterior body 150 (the tubular portion 151 and the horizontal annular portion 152) is a substantially cylindrical mold (not shown) formed into a tubular, heat-shrinkable foamed resin sheet (not shown). The foamed resin sheet is shrunk by externally fitting and heating the foamed resin sheet to form the above form.

[0006] Meanwhile, since the outer casing 150 having the above-described configuration is formed with the horizontal annular portion 152, when an external force in the radial direction is applied to the lower end side of the cylindrical portion 151 by gripping or the like, the outer body 150 is horizontal with respect to the external force. The strength in the cross section of the annular portion 152 (the cross section intersecting with the direction in which the external force acts), that is, the buckling strength of the horizontal annular portion 152 in the direction orthogonal to the thickness direction of the horizontal annular portion 152 is opposed.

[0007] However, when an external force is applied as described above, the external force concentrates on the inner peripheral edge of the horizontal annular portion 152, and buckling occurs on the inner peripheral edge to cause the horizontal annular portion 152 to move to the inner side or It may be bent or broken to the outside, and the buckling strength of the horizontal annular portion 152 There is a problem that the strength in the radial direction at the lower end side of the outer package 150 cannot be sufficiently obtained only by the degree.

[0008] In view of this, the heat-insulating container is pressed by heat sealing the bottom plate 160 to the inner surface of the horizontal annular portion 152 so as to cover the hole 153 formed by the horizontal annular portion 152 of the outer body 150, The applied external force is received by the horizontal annular portion 152 and the bottom plate 160 to prevent the external force from acting locally, and to obtain the radial strength at the lower end side of the exterior body 150 (insulated container). .

Disclosure of the invention

Problems to be solved by the invention

However, in the heat insulating container having the above configuration, the bottom plate 160 is adhered so as to close the hole 153 formed by the horizontal annular portion 152 of the exterior body 150 that secures the strength of the lower end side of the exterior body 150. There is a problem that manufacturing costs and material costs rise when manufacturing.

[0010] In view of such circumstances, an object of the present invention is to provide a heat insulating container that can reduce the number of steps and materials in manufacturing while sufficiently securing the strength of the lower end side of an exterior body. And

Means for solving the problem

[0011] An insulating container according to the present invention has been made to solve the above-mentioned problems, and is formed from a bottomed cylindrical container body as described in claim 1 and a heat-shrinkable foamed resin sheet. And an exterior body covering the peripheral wall of the container body, wherein the heat insulating container has a space formed between the peripheral wall and the exterior body, wherein the exterior body has a tubular portion facing the peripheral wall of the container body; An annular portion extending from the lower end opening edge of the cylindrical portion to the inside of the cylindrical portion, wherein the annular portion has a distal end side closer to the inner end surface than the base end side. It is characterized by being separated from

[0012] According to the heat-insulating container having the above configuration, the annular portion is formed so that the distal end side is separated from the inner peripheral surface of the cylindrical portion as compared with the base end side. When an external force acts on the annular part, the external force does not act in a direction perpendicular to the cross section of the annular part (buckling direction in the annular part), but acts in a direction crossing the annular part. become. [0013] Then, the external force acts to bend (radius) the annular portion, and an elastic force is generated in the annular portion by the bending action. Therefore, the elasticity (elastic force) of the annular portion can counter external force, and the strength of the lower end portion of the tubular portion provided with the base end of the annular portion can be increased. In addition, the external force is absorbed by the bending action (elasticity) in the annular portion, and the external force does not concentrate on the local portion of the distal end (inner peripheral edge) or the base end (outer peripheral edge) of the annular portion. Deformation and breakage can be prevented.

[0014] Therefore, it is possible to obtain sufficient radial strength of the heat insulating container by the annular portion without providing a bottom plate that closes the hole formed by the annular portion as in the related art. In addition, this eliminates the need for a step of attaching a bottom plate at the time of manufacturing, and can reduce material costs and manufacturing costs.

[0015] Further, the exterior body according to claim 2 may further include a horizontal annular portion extending toward a center of the tubular portion at a tip of the annular portion. When the bending action occurs in the annular portion as described above, the elastic force acts to increase the diameter of the opening (the inner peripheral edge) on the distal end side of the annular portion. By providing the portion and increasing the strength of the distal end portion of the annular portion, the deformation of the distal end of the annular portion can be restricted, and external force can be efficiently dispersed and absorbed in the circumferential direction of the annular portion. Thereby, the strength of the lower end side of the cylindrical portion (exterior body) can be further increased.

[0016] Further, the annular portion as described in claim 3 is formed such that a tip thereof has an interval with the bottom of the container body, so that gas in the space can flow outside through a lower end opening of the cylindrical portion. Preferably, it is configured.

[0017] According to this configuration, even when the high-temperature container is accommodated in the container main body, the air in the space between the peripheral wall of the container main body and the cylindrical portion is heated via the peripheral wall of the container main body. By lifting (separating) the mounting surface force on which the heat-insulating container is mounted, convection of air is generated in the space through the lower end opening of the cylindrical portion (external air having a lower temperature than the air in the space). While the air flows into the space, the air in the space is released to the outside), which can cool the space. Therefore, even if a high-temperature container is stored in the heat-insulating container for a long time, it is possible to prevent the air in the space from heating the tubular portion of the exterior body, which is more favorable as a heat-insulating container. It can be something. The invention's effect

[0018] As described above, according to the heat insulating container of the present invention, the bottomed cylindrical container main body and the exterior body formed from the heat-shrinkable foamed resin sheet and covering the peripheral wall of the container main body are provided. In the heat insulating container having a space formed between the peripheral wall and the exterior body, the exterior body has a cylindrical portion facing the peripheral wall of the container body and a lower end opening edge of the cylindrical portion as a base end. And an annular portion extending inside the cylindrical portion. The annular portion has a distal end side separated from an inner peripheral surface of the cylindrical portion as compared with a base end side. It is possible to obtain an excellent effect that it is possible to reduce man-hours and materials in the production while sufficiently securing the strength of the material. Brief Description of Drawings

FIG. 1 shows a side view including a partial cross section of a heat insulating container according to a first embodiment of the present invention.

FIG. 2 shows a partial cross-sectional view of an upper end portion of the heat insulating container according to the first embodiment.

FIG. 3 is a partial cross-sectional view of a lower end portion of the heat insulating container according to the first embodiment.

FIG. 4 is an overall perspective view of a mold and a press mold for molding the exterior body according to the first embodiment.

FIG. 5 is an explanatory view of a molding step of an exterior body that is powerful according to the first embodiment. FIG. 5 (a) shows a state in which a foamed resin sheet is externally fitted to a mold and heated to form a cylindrical portion. (B) shows a state in which the other end of the foamed resin sheet is formed into a horizontal ring by heating, and (c) presses the other end of the horizontally formed foamed resin sheet with a press die. (D) shows a state in which the annular portion and the horizontal annular portion are formed by the mold and the press mold.

FIG. 6 shows a front view of a heat insulating container according to a second embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a heat insulating container according to a second embodiment.

FIG. 8 is an enlarged partial cross-sectional view of the vicinity of a flange portion in a heat insulating container according to a second embodiment.

FIG. 9 is an enlarged partial cross-sectional view near the bottom of a heat insulating container according to a second embodiment.

FIG. 10 shows a front view of a heat insulating container according to a third embodiment of the present invention.

FIG. 11 is a longitudinal sectional view of a heat insulating container according to a third embodiment.

FIG. 12 is an enlarged partial cross-sectional view of the vicinity of a flange portion of the heat insulating container according to the third embodiment. Indicates.

FIG. 13 is an enlarged partial cross-sectional view near the bottom of a heat insulating container according to a third embodiment.

FIG. 14 shows a side view including a partial cross section of a conventional heat insulating container.

Explanation of symbols

[0020] 1 ... container body, 2 ... exterior body, 5 ... connection part, 10 ... peripheral wall, 10a ... upper peripheral wall part, 10b ... lower peripheral wall part, 11 ... connection part, 12 ... flange part, 12a, 12b ... piece , 13: engagement projection, 14 ··· bottom, 14a… bottom plate, 14b… bottom connection, 20… cylindrical part, 21… annular part, 22… curl part, 23… horizontal annular part, 40… space , 50 ... mold, 51 ... press mold, 52 ... concave, 53 ... annular convex, 54 ... convex, 100a ... concave, 100b ... convex, 110 ... peripheral wall body, 111 ... annular connection, 112 ... large Diameter part, 113… Flange part, 113a… Top plate part, 113b… Suspended part, 114… Lower tubular part, 114a… Thick tubular part, 114b… Thin tubular part, 115… Vertical rib, 117… Reinforcement BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the heat insulating container according to the first embodiment of the present invention will be described with reference to the accompanying drawings.

The heat insulating container according to the present embodiment includes a bottomed cylindrical container main body 1 as shown in FIG. 1, and an exterior body 2 covering a peripheral wall 10 of the container main body 1.

The container main body 1 is a resin molded product molded by a molding method such as injection molding, blow molding, vacuum molding, or air pressure molding. The container body 1 is formed in a cylindrical shape such that the radial force S becomes smaller toward the lower end side of the peripheral wall 10. The container main body 1 has an annular connecting portion 11 extending outward at the upper end of a peripheral wall 10, and an outer peripheral edge of the connecting portion 11, which is open downward and has a U-shaped annular flange in cross section. The lower end of piece 12a on the inner peripheral side of part 12 is connected

[0024] On the outer peripheral side piece 12b of the flange section 12, a plurality of engaging projections 13 bulging toward the inner peripheral side piece 12a side are formed at predetermined intervals in a circumferential direction.

The exterior body 2 is formed from a heat-shrinkable foamed resin sheet, and has a tubular portion 20 that covers the peripheral wall 10 so as to face the peripheral wall 10 of the container body 1, An annular portion 21 (returned) extending from the lower end of the base 20 toward the inside of the cylindrical portion 20 is provided at the base end. It is. The step of molding the exterior body 2 using the foamed resin sheet will be described later.

[0026] At an upper end portion of the tubular portion 20, a curled portion 22 curled outward is formed. The curl portion 22 is fitted into the flange portion 12 of the container main body 1, and in this state, the curl portion 22 is shaped so as to engage with the engaging projection 13.

[0027] The annular portion 21 is formed such that a distal end side (an inner peripheral edge side) is separated from an inner peripheral surface of the tubular portion 20. Specifically, the annular portion 21 is formed such that the distal end (inner peripheral edge) is located on the inner side of the cylindrical portion 20 from the base end (outer peripheral edge), and is tapered so that the distal end side is tapered. Note that the inclination angle of the annular portion 21 with respect to the inner peripheral surface of the cylindrical portion 20 is preferably set to 30 ° 60 °.

On the inner peripheral edge of the annular portion 21, a horizontal annular portion 23 extends toward the center of the tubular portion 20.

[0029] In the heat insulating container having the above configuration, the container main body 1 is fitted into the exterior body 2 so that the inner peripheral surface of the cylindrical portion 20 and the outer peripheral surface of the peripheral wall 10 of the container main body 1 face each other. By fitting the curled portion 22 to the flange portion 12 of the container body 1 as described above, a space 40 is formed between the peripheral wall 10 of the container body 1 and the cylindrical portion 20 of the exterior body 2.

Further, in this state, as shown in FIG. 3, the tip of the annular portion 21 and the inner surface of the horizontal annular portion 23 have an interval with the bottom portion 14 of the container body 1, and the space 40 It is in a state of communicating with the outside through the tip of the part 21 and between the horizontal annular part 23 and the bottom part 14 of the container body 1, the hole formed in the annular part 21, and the lower end opening of the cylindrical part 20. .

[0031] In the heat insulating container having the above configuration, when the outer body 2 is gripped and a radial external force is applied to the outer body 2 (lower end), the external force is directed toward the center of the cylindrical portion 20 ( (In a direction orthogonal to the center line of the tubular portion 20), and acts so as to reduce the diameter of the lower end opening edge of the tubular portion 20 or deform it into a flat shape. At the same time, the external force acts on the base end (outer peripheral edge) of the annular portion 21 toward the center of the cylindrical portion 20.

Then, since the annular portion 21 is formed in an annular shape that tapers toward the inner side of the tubular portion 20, an external force acts on the annular portion 21 in a direction intersecting the surface of the annular portion 21. In the tip side of the, the opposite direction of action (direction of expanding the inner peripheral edge) against external force Power will be created. Accordingly, a bending action occurs between the base end and the distal end of the annular portion 21, and the elastic force generated in the annular portion 21 by the bending prevents the cylindrical portion 20 from being deformed in the radial direction due to an external force. .

That is, in the heat insulating container, an external force is formed by forming the annular portion 21 to extend inside the cylindrical portion 20 and forming the distal end side in a tapered shape so as to be separated from the inner peripheral surface of the cylindrical portion 20. When an elastic force is applied, an elastic force is generated in the annular portion 21, and the elasticity can be utilized to sufficiently obtain the radial strength at the lower end portion of the exterior body 2.

[0034] Further, in the heat insulating container, the horizontal annular portion 23 is extended at the tip of the annular portion 21 to enhance the strength near the inner peripheral edge of the annular portion 21, and the vicinity of the inner peripheral edge of the annular portion 21 due to the reaction force against the external force. Is restricted from being deformed, so that more radial strength can be obtained. That is, the elasticity between the base end and the distal end of the annular portion 21 is effectively used against external force to increase the strength at the lower end side of the tubular portion 20 and increase the strength.

Further, a gap is formed between the distal end of the annular portion 21 of the exterior body 2 and the inner surface of the horizontal annular portion 23 and the bottom portion 14 of the container body 1 (the distal end of the annular portion 21 is formed on the bottom portion 14 of the container body 1). By forming the annular portion 21 so as to have an interval with respect to the space, even if the air in the space 40 is heated by storing the heated food or the like in the container body 1, When lifted from the surface, convection of air occurs in the space 40 (external air having a lower temperature than the heated air in the space 40 flows in from the lower end opening of the exterior body 2).

[0036] Therefore, it is possible to suppress the temperature rise in the space 40 and to suppress the heat of the air in the space 40 from being transmitted to the exterior body 2, so that the function as a heat insulating container can be further improved. It's swelling.

[0037] Further, the heat insulating container has a mode in which a concave portion is formed at the bottom by extending the annular portion 21 from the lower end of the cylindrical portion 20 toward the inside so as to be inclined with respect to the inner peripheral surface. As a result, the heat insulating container can be held with the finger placed on the annular portion 21. Therefore, the heat insulating container can be stably gripped without slipping. Further, even if the heat insulating container is held with a finger placed on the annular portion 21 in this manner, since the horizontal annular portion 23 extends from the inner peripheral edge (the leading end) of the annular portion 21, the annular portion 21 is provided. When a high-temperature cooked food or the like is placed in the container body 1 so that the finger placed on 21 cannot touch the bottom 14 of the container body 1 It is safe without accidents such as burns.

Next, a process of manufacturing the outer package 2 having the above configuration will be described. When manufacturing the exterior body 2, as shown in FIG. 4, a mold 50 for forming the cylindrical portion 20 of the exterior body 2, a press mold 51 for forming the annular portion 21 and the horizontal annular portion 23, and the exterior body 2 are provided. A band-shaped foamed resin sheet S to be formed (in the figure, a tubular shape) is prepared in advance. The step of forming the curled portion 22 is omitted, and the mold 50, the press mold 51, and the foamed resin sheet S will be described prior to the description of the manufacturing process of the exterior body 2.

[0039] The mold 50 is formed in a truncated right conical shape with the outer diameter set from one end to the other end to be small in accordance with the shape of the cylindrical portion 20. Here, the truncated right cone refers to a shape obtained by cutting off the tip of the right cone in a direction perpendicular to the center. In the mold 50, a concave portion 52 into which the press die 51 is fitted is formed on the other end surface set to a small diameter, and an annular convex portion 53 having an upper end substantially horizontal is formed on the outer peripheral edge of the other end surface. Have been. The inner peripheral surface of the annular convex portion 53 is formed in a tapered shape, and an angle formed between the outer peripheral surface of the mold 50 and the inner peripheral surface of the annular convex portion 53 is an annular angle with respect to the cylindrical portion 20 of the exterior body 2. The angle is set to correspond to the inclination angle of the part 21.

The press die 51 has a convex portion 54 fitted into the concave portion 52. The projection 54 is formed in a truncated cone shape corresponding to the shape of the inner peripheral surface of the annular projection 53.

In the foamed resin sheet S, the length in the short side direction is set to be longer than the length to the one end force and the other end in the mold 50, and the one side that becomes the outer surface when the exterior body 2 is formed A sheet made of expanded polystyrene having a heat-shrinkable expansion ratio of 2 to 10 times (preferably 2.5 to 7 times) on which characters, designs, etc. are printed is used. Further, the foamed resin sheet S has heat shrinkability in one direction (longitudinal direction).

[0042] The foamed polystyrene constituting the foamed resin sheet S is obtained by foaming general-purpose polystyrene with various foaming agents, or copolymerizing polystyrene with butadiene, acrylonitrile, methacrylic acid, acrylic acid, acrylates and the like. It is possible to employ, for example, those obtained by foaming with a foaming agent a material containing the copolymer as a main component and containing the styrene component in an amount of 50% by weight or more (preferably 70% or more). The thickness of the foamed resin sheet S is 0.1-1. Omm, preferably 0.2-0.5 mm. In order to manufacture the exterior body 2 using the mold 50 and the press mold 51 having the above configuration, first, both ends of the foamed resin sheet S having the above configuration in the longitudinal direction are adhered to each other to form a cylindrical shape. . In this state, the foamed resin sheet S can be thermally contracted in the circumferential direction (toward the center). The heat shrinkage of the foamed resin sheet S is measured, for example, by the shrinkage when immersed in oil at a predetermined temperature for 10 seconds, and is measured in the circumferential direction of the tubular foamed resin sheet S of the present embodiment. Has a heat shrinkage of less than 5% at 80 ° C and 110. In C, it is 30 to 60%.

Then, one end of the mold 50 and one end opening edge of the tubular foamed resin sheet S are made to coincide with each other, and the tubular foamed resin sheet S is externally fitted so as to cover the outer peripheral surface of the mold 50. I do. In this state, the other end opening edge of the tubular foamed resin sheet S as shown in FIG. 5A is located outside the other end of the mold 50.

When the foamed resin sheet S is heated by hot air A or the like, the foamed resin sheet S has heat shrinkage, so that the diameter is reduced in the center direction, and the foamed resin sheet S comes into close contact with the outer peripheral surface of the mold 50 and has a cylindrical shape. A shape 20 will be formed. Then, when the foamed resin sheet S (especially the other end) is further heated, the other end contracts toward the center and falls in the axial direction of the mold 50 as shown in FIG. Will do.

In this state, the heating is stopped, and the other end of the foamed resin sheet S forming a horizontal ring is pressed by a press mold 51 as shown in FIG. 5 (c). In this press operation, the heating of the foamed resin sheet S is stopped, but since the foamed resin sheet S has been softened by the heating so far, as shown in Fig. 5 (d). The other end of the foamed resin sheet S is smoothly pushed into the concave portion 52 of the mold 50 by the convex portion 54 of the press mold 51 using the upper end of the annular convex portion 53 as a bending fulcrum.

[0047] Then, a tapered annular portion 21 is formed with one end (lower end) of the tubular portion 20 as a base end corresponding to the outer peripheral shape of the press die 51. At the same time, since the contraction force is acting toward the center on the other end side of the annular portion 21, the tubular portion 20 (the concave portion 52 of the mold 50) remains inside the tubular portion 20 while maintaining the horizontal annular shape. The horizontal annular portion 23 is formed by being pressed down. In this state, the press mold 51 is separated from the mold 50, and the mold 50 is removed, whereby the exterior body 2 having the above-described configuration is formed from the tubular foamed resin sheet S. [0048] Therefore, when manufacturing the exterior body 2 capable of sufficiently obtaining the strength of the lower end side of the heat insulating container (exterior body 2) as described above, the bottom plate that closes the hole formed by the annular portion as in the related art This eliminates the need for a process for providing the heat insulating container, and can reduce the manufacturing cost and material cost for manufacturing the heat insulating container.

Next, a description will be given of a heat-insulating container according to a second embodiment of the present invention. Note that, in the present embodiment, the same or equivalent components as those in the first embodiment are given the same names and the same reference numerals as those in the first embodiment.

The heat insulating container according to the present embodiment covers the bottomed cylindrical container main body 1 and the peripheral wall 10 of the container main body 1 as in the first embodiment as shown in FIGS. 6 and 7. And an outer package 2.

[0051] The container body 1 is a resin molded product formed by injection molding using polypropylene, high-density polyethylene, or the like as a material. The container body 1 is composed of a cylindrical peripheral wall 10 and a bottom 14 that closes a lower end opening of the peripheral wall 10.

[0052] The peripheral wall 10 is formed in an inverted conical cylindrical shape such that the diameter decreases toward the lower end. Specifically, the peripheral wall 10 is formed below the upper peripheral wall 10a, and has a cylindrical upper peripheral wall 10a that forms an opening of the heat insulating container, and has a smaller diameter than the upper peripheral wall 10a. A lower peripheral wall portion 10b, and an annular connecting portion 5 for connecting the lower end opening edge of the upper peripheral wall portion 10a and the upper end opening edge of the lower peripheral wall portion 10b.

[0053] The upper peripheral wall portion 10a has a cylindrical peripheral wall main body portion 110 in which a lower end opening edge portion is connected to an outer peripheral edge portion of the connection portion 5, and an inner peripheral edge portion in the upper end opening edge portion of the peripheral wall main body portion 110. , A cylindrical large-diameter portion 112 having a lower-end opening edge connected to the outer peripheral edge of the annular connection portion 111, and an upper-end opening edge of the large-diameter portion 112. And a flange portion 113 extending outward from the portion.

[0054] The peripheral wall main body 110 is formed in an inverted conical cylindrical shape so that the directional force toward the lower end side and the outer diameter and the inner diameter become smaller toward the lower end side. The peripheral wall main body 110 is formed by forming a plurality of ridges 110a and a plurality of ridges 110b extending in the axial direction alternately in the circumferential direction.

The surface of the concave ridge 110a forms a concave curved surface in the circumferential direction, and The surface has a convex curved surface in the circumferential direction. Thus, the outer peripheral surface of the peripheral wall main body 110 has a wavy curved surface in which concave curved surfaces and convex curved surfaces are alternately formed.

In other words, the cross section of the ridge 110b has a gentle mountain shape, and the connection between the ridges 11 Ob forms the recess 110a. In the present embodiment, the concave streak 110a is formed to have a predetermined angle (about 7.5 ° in the present embodiment) in the circumferential direction around the axis of the peripheral wall main body 110. . Therefore, also for the plurality of ridges 110b, the apex force between the adjacent ridges 110b via the concave ridges 110a is spaced at a predetermined angle (7.5 ° in this embodiment) about the axis of the peripheral wall main body 110. Is formed so as to have in the circumferential direction.

[0057] At the lower end of the peripheral wall main body 110 that works in the present embodiment, a reinforcing piece 117 for increasing the radial strength of the container main body 1 is vertically provided. The reinforcing piece 117 is provided at a predetermined interval on the outer peripheral surface of the lower peripheral wall 1 Ob (lower cylindrical portion 114 described later), and both ends are connected to the vertical rib 115 described later. Being done.

[0058] As described above, the annular connecting portion 111 has an outer peripheral edge connected to the upper end opening edge of the peripheral wall main body 110, and is formed in a flange shape with respect to the peripheral wall main body 110. .

[0059] The large diameter portion 112 has a substantially true cylindrical shape, and a lower end opening edge is connected to an outer peripheral edge of the annular connection portion 111. As a result, the large diameter portion 112, the annular connection portion 111, and the peripheral wall main body 110 form a step near the upper end opening of the upper peripheral wall portion 10a (the container main body 1). Can be used as a line of sight to indicate the amount of hot water to pour.

[0060] The flange portion 113 is composed of a horizontal annular top plate portion 113a and a hanging portion 113b vertically provided on an outer peripheral edge portion of the top plate portion 113a, and has a substantially L-shaped cross section. I have. The flange portion 113 is connected to an upper end opening edge of the large diameter portion 112 at an inner peripheral edge of the top plate portion 113a, whereby an upper surface of the top plate portion 113a is connected to the heat insulating container. It constitutes the upper end surface. The flange portion 113 has a sealing lid (not shown) in which an aluminum foil and a laminating material such as a synthetic resin film or paper are laminated on a top plate portion 113a in a releasable manner. The container body 1 containing the instant 麵ゃ, soup, etc. that can be eaten by pouring is sealed. [0061] The lower peripheral wall portion 10b includes a lower cylindrical portion 114 whose upper end opening edge is connected to the upper peripheral wall portion 10a through the connection portion 5, and an outer peripheral surface of the lower cylindrical portion 114 in a vertical direction. It is composed of a plurality of vertical ribs 115 projecting so as to extend.

[0062] The lower cylindrical portion 114 is formed in an inverted conical cylindrical shape (a cylindrical shape having an inverted truncated conical shape) so that the force toward the lower end side, and the outer diameter and the inner diameter become smaller as it goes. The lower tubular portion 114 according to the present embodiment includes a thick tubular portion 114a on the upper end opening side connected to the connection portion 5 in consideration of a resin flow during molding, and the thick tubular portion. And a thin-walled cylindrical portion 114b connected to the lower edge of the lower end of 114a.

[0063] Since the lower cylindrical portion 114 is connected to the upper peripheral wall portion 10a via the connecting portion 5 as described above, the outer diameter of the upper end opening edge portion of the thick cylindrical portion 114a is connected. Due to the interposition of the portion 5, the diameter is smaller than the inner diameter of the lower end opening of the upper peripheral wall portion 10a (the peripheral wall main body portion 110), and is formed in an inverted conical cylindrical shape having a smaller diameter toward the lower end side.

[0064] The thin-walled cylindrical portion 114b has an upper opening edge at the lower end opening edge of the thick-walled cylindrical portion 114a so as to form a substantially uniform continuous surface with the inner peripheral surface of the thick-walled cylindrical portion 114a. Connected to the unit. The thickness of the thin-walled cylindrical portion 114b is set to be smaller than the thickness of the thick-walled cylindrical portion 114a, and in the present embodiment, is set to about 0.2 mm to 0.4 mm. Like the thick-walled tubular portion 114a, the thin-walled tubular portion 114b also has a substantially inverted conical tubular shape such that the diameter becomes smaller toward the lower end side.

The plurality of vertical ribs 115 are provided radially on the outer peripheral surface of the lower cylindrical portion 114 around the axis of the lower peripheral wall portion 10b. That is, the plurality of vertical ribs 115 are provided radially around the axis of the lower tubular portion 114 so as to straddle the thick tubular portion 114a and the thin tubular portion 114b. In the present embodiment, the vertical rib 115 has an upper end connected to the lower surface of the connection portion 5, and the amount of protrusion gradually decreases from the upper end of the lower tubular portion 114 toward the lower end.

[0066] The vertical rib 115 that works in the present embodiment has a protruding amount in the vicinity of a connection portion between the thick tubular portion 114a and the thin tubular portion 114b about 1.1 with respect to the outer peripheral surface of the thin tubular portion 114b. The thickness is set to 5 mm-2.7 mm, and the thickness of the portion connected to the thin cylindrical portion 114b is set to about 0.6-0.7 mm. As a result, the container main body 1 that is strong in the present embodiment is attached to the peripheral wall main body 110. , The tip of the vertical rib 115, and the outer surface of the bottom portion 14 are continuously formed. When the vertical ribs 115 are set to the above dimensions, the thickness of the thick cylindrical portion 114a is set to about 0.000 on the assumption that the thickness is greater than the thickness of the thin cylindrical portion 114b. It is preferable to set the length between 3 mm and 0.8 mm, and to set the length of the axis center at about lmm to 10 mm.

The bottom portion 14 has a circular bottom plate portion 14a in plan view, and the bottom plate portion 14a is formed into a thin cylindrical portion 114b.

(Peripheral wall 10) and a bottom connection portion 14b connected to the lower end opening edge. The bottom plate portion 14a is formed such that a substantially central circular area slightly bulges inside the container body 1.

[0068] The bottom connection portion 14b is formed in an annular shape, and one surface forming the inner surface of the container body 1 has a concave curved surface, and the other surface forming the outer surface of the container body 1 has a convex shape. It is formed so as to form a curved surface. The bottom connecting portion 14b is connected to the outer peripheral edge of the bottom plate portion 14a at the inner peripheral edge, and forms a substantially dish-shaped bottom portion 14 together with the bottom plate portion 14a. The outer peripheral edge of the bottom connection portion 14b is connected to the lower edge opening edge of the lower tubular portion 114 (peripheral wall 10).

The exterior body 2 is formed from a heat-shrinkable foamed resin sheet similarly to the first embodiment, and has a cylindrical shape that covers the peripheral wall 10 so as to face the peripheral wall 10 of the container body 1. A portion 20 and an annular portion 21 (returned) extending from the lower end of the tubular portion 20 to the inside of the tubular portion 20 are provided.

[0070] The cylindrical portion 20 is fixed with respect to the peripheral wall 10 of the container main body 1 (strictly speaking, the outer peripheral surface of the peripheral wall main body portion 110 and the tip of the vertical rib 115 on the outer peripheral surface of the lower peripheral wall portion 10b). The inner diameter is set so that it can be fitted onto the peripheral wall 10 of the container main body 1 in a state where there is a space between them, and in the present embodiment, it is formed in an inverted conical cylindrical shape corresponding to the peripheral wall 10 of the container main body 1. It has been done.

[0071] Unlike the first embodiment, the upper end opening of the cylindrical portion 20 according to the present embodiment is not provided with the curl portion 22, and is formed in a substantially true cylindrical shape. The upper end opening of the cylindrical portion 20 is set to an inner diameter that can be fitted to the large diameter portion 112 of the container body 1.

[0072] The annular portion 21 is formed such that the distal end side (the inner peripheral edge side) is separated from the inner peripheral surface of the tubular portion 20. Specifically, the annular portion 21 has a distal end (inner peripheral edge) that is cylindrical from a proximal end (outer peripheral edge). It is located inside the shape portion 20 and is formed in a tapered shape so that the tip side is tapered. Note that the inclination angle of the annular portion 21 with respect to the inner peripheral surface of the cylindrical portion 20 is preferably set to 30 ° -60 °. A horizontal annular portion 23 extends toward the center of the cylindrical portion 20 on the inner peripheral edge of the annular portion 21. Since the exterior body 2 is manufactured by the same steps as those in the first embodiment, the step of manufacturing the exterior body 2 is omitted.

In the heat-insulating container having the above configuration, the container main body 1 is fitted into the exterior body 2 such that the inner peripheral surface of the cylindrical portion 20 and the outer peripheral surface of the peripheral wall 10 of the container main body 1 face each other, as shown in FIG. When the upper end of the outer body 2 (cylindrical portion 20) is fitted over the large-diameter portion 112 of the container body 1 and the upper end of the cylindrical portion 20 is brought into contact with the lower surface of the top plate portion 113a as shown in FIG. As shown in FIG. 9, the bottom portion 14 (bottom plate portion 14a) comes into contact with and is supported by the horizontal annular portion 23. As a result, when the hot water is poured into the container body 1, the thinly formed bottom portion 14 (bottom plate portion 14a) is softened and deformed so as to deflect downward by the weight of the hot water and the contents. Can be prevented. In this state, a space 40 is formed between the peripheral wall 10 (the peripheral wall main body 110 and the lower cylindrical part 114) of the container main body 1 and the cylindrical part 20 of the exterior body 2, and heat is generated. The heat insulation effect can be obtained by air conduction (see Fig. 7).

According to the heat insulating container having the above configuration, when the outer body 2 is gripped and an external force is applied to the outer body 2 (the lower end) in the radial direction, the external force is directed toward the center of the cylindrical portion 20. (In the direction perpendicular to the center line of the cylindrical portion 20), and acts to reduce the diameter of the lower end opening edge of the cylindrical portion 20 or to deform the flat portion into a flat shape. At the same time, the external force acts on the base end (outer peripheral edge) of the annular portion 21 toward the center of the tubular portion 20.

Then, since the annular portion 21 is formed in an annular shape that tapers toward the inner side of the tubular portion 20, an external force acts on the annular portion 21 in a direction intersecting with the annular portion 21. On the leading end side, a reaction force is generated in a direction having a different action direction (a direction of expanding the inner peripheral edge) with respect to an external force. Accordingly, a bending action occurs between the base end and the distal end of the annular portion 21, and the elastic force generated in the annular portion 21 by the bending prevents the cylindrical portion 20 from being deformed in the radial direction due to an external force. .

That is, in the heat insulating container, the external force is formed by extending the annular portion 21 inside the cylindrical portion 20 and forming the distal end side in a tapered shape so as to be separated from the inner peripheral surface of the cylindrical portion 20. When joined An elastic force is generated in the annular portion 21 so that sufficient strength in the radial direction at the lower end of the exterior body 2 can be obtained by utilizing the elasticity.

Further, in the heat insulating container, a horizontal annular portion 23 is extended at the tip of the annular portion 21 to enhance the strength near the inner peripheral edge of the annular portion 21, and the vicinity of the inner peripheral edge of the annular portion 21 is generated by a reaction force against an external force. Is restricted from being deformed, so that more radial strength can be obtained. That is, the elasticity between the proximal end and the distal end of the annular portion 21 is effectively used against external force, so that the strength at the lower end side of the cylindrical portion 20 is increased. Therefore, when manufacturing the exterior body 2 capable of sufficiently obtaining the strength of the lower end side of the heat insulating container (exterior body 2), a step of providing a bottom plate for closing the hole formed by the annular portion is not required as in the related art. In addition, it is possible to reduce the manufacturing cost and material cost for manufacturing the heat insulating container.

[0078] In addition, the heat insulating container has an embodiment in which the annular portion 21 extends from the lower end of the cylindrical portion 20 toward the inside so as to be inclined with respect to the inner peripheral surface, so that a concave portion is formed at the bottom. Therefore, it is possible to hold the heat-insulating container with the finger placed on the annular portion 21. Therefore, the thermal insulation container can be gripped in a stable state without slipping. Even when the heat insulating container is held with a finger placed on the annular portion 21 in this manner, since the horizontal annular portion 23 extends from the inner peripheral edge (tip) of the annular portion 21, Even if hot foods are put in the container body 1 while the fingers cannot touch the bottom part 14 of the container body 1, it is safe without injuries such as burns.

Further, since the plurality of vertical ribs 115 are provided on the lower peripheral wall portion 10b constituting the peripheral wall 10 of the container body 1, when the outer casing 2 is gripped, the outer casing 2 is acted upon by the gripping force. Even if it is deformed in the radial direction, it will be in a state of contacting the vertical rib 115, and a space 40 is always formed between the lower peripheral wall portion 10b and the exterior body 2, and the heat insulating effect is always maintained by heat conduction in the space 40. That can be S.

Further, in the heat insulating container according to the present embodiment, the connection portion (bottom connection portion 14b) between the peripheral wall 10 and the bottom portion 14 of the container body 1 is rounded to prevent interference with the exterior body 2. Accordingly, the bottom plate portion 14a can be supported by the horizontal annular portion 23, and the strength of the heat insulating container can be increased.

[0081] The inner peripheral surface of the bottom portion 14 of the container body 1 (the inner surface of the bottom connection portion 14b) has a concave curved surface. Since the tip of the spoon is along the inner peripheral surface of the bottom portion 14, the contents can be easily scooped without remaining in the container body 1.

Next, a heat insulating container according to a third embodiment of the present invention will be described. In the present embodiment, the same components as those in the first and second embodiments, and the same or equivalent components as those in the first and second embodiments, have the same names and the same reference numerals as those in the first and second embodiments. And

[0083] As in the first and second embodiments as shown in Figs. 10 and 11, the heat-insulating container of the present embodiment includes a cylindrical container body 1 with a bottom and a container body 1 And an exterior body 2 that covers the peripheral wall 10.

[0084] The container body 1 is a resin molded product formed by injection molding using polypropylene, high-density polyethylene, or the like as a material. The container body 1 is composed of a cylindrical peripheral wall 10 and a bottom 14 that closes a lower end opening of the peripheral wall 10.

[0085] The peripheral wall 10 is formed in an inverted conical cylindrical shape such that the diameter decreases toward the lower end. Specifically, the peripheral wall 10 is formed below the upper peripheral wall 10a, and has a cylindrical upper peripheral wall 10a that forms an opening of the heat insulating container, and has a smaller diameter than the upper peripheral wall 10a. A lower peripheral wall portion 10b, and an annular connecting portion 5 connecting the lower end opening edge of the upper peripheral wall portion 10a and the upper end opening edge of the lower peripheral wall portion 10b.

[0086] The upper peripheral wall portion 10a includes a cylindrical peripheral wall main body portion 110 having a lower end opening edge portion connected to the outer peripheral edge portion of the connection portion 5, and an inner peripheral edge portion formed at the upper end opening edge portion of the peripheral wall main body portion 110. , A cylindrical large-diameter portion 112 having a lower-end opening edge connected to the outer peripheral edge of the annular connection portion 111, and an upper-end opening edge of the large-diameter portion 112. And a flange portion 113 extending outward from the portion.

[0087] The peripheral wall main body 110 according to the present embodiment has a substantially uniform thickness in the circumferential direction and the axial direction, and has a smaller diameter toward the lower end and has an inverted conical cylindrical shape. The opening edge is connected to the outer peripheral edge of the connection portion 5. At the lower end of the peripheral wall main body 110, a reinforcing piece 117 for increasing the radial strength of the container main body 1 is vertically provided. The reinforcing pieces 117 are provided at predetermined intervals on the outer peripheral surface of the lower peripheral wall portion 10b, and both ends are connected to vertical ribs 115 described later. [0088] The annular connection portion 111 has an outer peripheral edge connected to the upper end opening edge of the peripheral wall main body 110 as described above, and is formed in a flange shape with respect to the peripheral wall main body 110. .

The large-diameter portion 112 has a substantially true cylindrical shape, and a lower end opening edge is connected to an outer peripheral edge of the annular connection portion 111. As a result, the large diameter portion 112, the annular connection portion 111, and the peripheral wall main body 110 form a step near the upper end opening of the upper peripheral wall portion 10a (the container main body 1). Can be used as a line of sight to indicate the amount of hot water to pour.

[0090] The flange portion 113 is composed of a horizontal annular top plate portion 113a and a hanging portion 113b vertically provided on an outer peripheral edge of the top plate portion 113a, and has a substantially L-shaped cross section. I have. The flange portion 113 is connected to an upper end opening edge of the large diameter portion 112 at an inner peripheral edge of the top plate portion 113a, whereby an upper surface of the top plate portion 113a is connected to the heat insulating container. It constitutes the upper end surface. The flange portion 113 has a sealing lid (not shown) in which an aluminum foil and a laminating material such as a synthetic resin film or paper are laminated on a top plate portion 113a in a releasable manner. The container body 1 containing the instant 麵ゃ, soup, etc. that can be eaten by pouring is sealed.

[0091] The lower peripheral wall portion 10b has an upper end opening edge connected to the upper peripheral wall portion 10a via the connection portion 5, and a lower end opening is closed by the bottom portion 14. The lower peripheral wall portion 10b is formed in an inverted conical cylindrical shape (a cylindrical shape having an inverted truncated conical shape) so that the outer diameter and the inner diameter become smaller as the force moves toward the lower end side. The lower peripheral wall portion 10b according to the present embodiment has a thickness on the upper end opening side connected to the connection portion 5 in consideration of the flow of the resin at the time of molding, similarly to the lower cylindrical portion 114 that works in the second embodiment. It is composed of a thick tubular portion 114a and a thin tubular portion 114b connected to the lower end opening edge of the thick tubular portion 114a, and is formed in an inverted conical tubular shape as a whole. .

[0092] Since the lower peripheral wall portion 10b is connected to the upper peripheral wall portion 10a via the connection portion 5 as described above, the outer diameter of the upper end opening edge of the thick-walled cylindrical portion 114a has a connection portion. Due to the interposition of 5, the diameter is smaller than the inner diameter of the lower end opening of the upper peripheral wall portion 10a (peripheral wall main body portion 110), and is formed in an inverted conical cylindrical shape having a smaller diameter toward the lower end side.

[0093] The thin tubular portion 114b forms a substantially uniform continuous surface with the inner peripheral surface of the thick tubular portion 114a. In order to achieve this, the upper end opening edge is connected to the lower end opening edge of the thick tubular portion 114a. The thickness of the thin-walled cylindrical portion 114b is set to be smaller than the thickness of the thick-walled cylindrical portion 114a, and in the present embodiment, is set to about 0.2 mm to 0.4 mm. Like the thick-walled tubular portion 114a, the thin-walled tubular portion 114b also has a substantially inverted conical tubular shape such that the diameter becomes smaller toward the lower end side.

[0094] On the outer peripheral surface of the peripheral wall 10 of the container main body 1 having the above-described configuration, a plurality of vertical ribs 115 are formed radially about the axis of the container main body 1 so as to straddle the peripheral wall main body 110 and the lower peripheral wall 10b. It is provided in. The plurality of vertical ribs 115 have their upper ends connected to the lower surface of the annular connection portion 111, and their upper ends are continuous with the outer peripheral surface of the large-diameter portion 112 (the distal ends are closer to the outer peripheral surface of the large-diameter portion 112). And does not protrude), and protrudes from the reinforcing piece 117 and extends downward. Further, the projecting amount of the vertical rib 115 at the other end side from the reinforcing piece 117 is gradually reduced toward the lower end, and the tip thereof also contacts the outer surface of a bottom portion 14 (bottom connecting portion 14b) described later. It is formed so as to be continuous. The vertical rib 115 that works in the present embodiment has a protrusion amount in the vicinity of a connection portion between the thick tubular portion 114a and the thin tubular portion 114b of about 1.5 mm—2 with respect to the outer peripheral surface of the thin tubular portion 114b. 7 mm, and the thickness of the portion connected to the thin cylindrical portion 114b is set to about 0.6 to 0.7 mm. Thus, in the container main body 1 according to the present embodiment, the outer peripheral surface of the peripheral wall main body 110, the tip of the vertical rib 115, and the outer surface with the bottom 14 are located on a continuous surface. When the vertical rib 115 is set to the above-described dimensions, the thick tubular portion 114a is made thicker than the thin tubular portion 114b as in the second embodiment. As a premise, it is preferable to set the wall thickness to about 0.3 mm-0.8 mm and set the length of the axis to about lmm-10 mm.

[0095] The bottom portion 14 has a circular bottom plate portion 14a in plan view, and the bottom plate portion 14a is formed into a thin cylindrical portion 114b.

[0096] The bottom connection portion 14b is formed in an annular shape, and one surface forming the inner surface of the container body 1 has a concave curved surface, and the other surface forming the outer surface of the container body 1 has a convex shape. Curvature of It is formed so as to form a plane. The bottom connecting portion 14b is connected to the outer peripheral edge of the bottom plate portion 14a at the inner peripheral edge, and forms a substantially dish-shaped bottom portion 14 together with the bottom plate portion 14a. The outer peripheral edge of the bottom connection portion 14b is connected to the lower edge opening edge of the lower peripheral wall 10b (the peripheral wall 10).

[0097] The outer package 2 is formed from a heat-shrinkable foamed resin sheet similarly to the first and second embodiments, and the outer wall 10 is formed so as to face the peripheral wall 10 of the container body 1. A cylindrical portion 20 that covers the cylindrical portion 20 and an annular portion 21 that is extended (turned back) from the lower end of the cylindrical portion 20 toward the inside of the cylindrical portion 20. You.

[0098] The cylindrical portion 20 is fixed to the peripheral wall 10 of the container main body 1 (strictly speaking, the outer peripheral surface of the peripheral wall main body portion 110 and the tip of the vertical rib 115 on the outer peripheral surface of the lower peripheral wall portion 10b). The inner diameter is set so that it can be fitted onto the peripheral wall 10 of the container main body 1 in a state where there is a space between them, and in the present embodiment, it is formed in an inverted conical cylindrical shape corresponding to the peripheral wall 10 of the container main body 1. It has been done.

[0099] Unlike the first embodiment, the cylindrical portion 20 according to the present embodiment does not have the curl portion 22 at the upper end opening, and is formed in a substantially perfect cylindrical shape. The upper end opening of the cylindrical portion 20 is set to an inner diameter that can be fitted to the large diameter portion 112 of the container body 1.

[0100] As in the first and second embodiments, the annular portion 21 has a distal end (inner peripheral edge) located closer to the inner side of the cylindrical portion 20 than a base end (outer peripheral edge), and is tapered toward the distal end side. It is formed in a tapered shape. Since the exterior body 2 is manufactured by the same steps as those of the first and second embodiments, the step of manufacturing the exterior body 2 is omitted.

[0101] In the heat insulating container having the above configuration, the container main body 1 is fitted into the exterior body 2 so that the inner peripheral surface of the cylindrical portion 20 and the outer peripheral surface of the peripheral wall 10 of the container main body 1 face each other, and as shown in FIG. When the upper end of the outer body 2 (cylindrical portion 20) is fitted over the large diameter portion 112 of the container body 1 and the upper end of the cylindrical portion 20 is brought into contact with the lower surface of the top plate 113a, As shown in FIG. 13, the bottom portion 14 (bottom plate portion 14a) comes into contact with and is supported by the horizontal annular portion 23. As a result, when the hot water is poured into the container body 1, the thin-walled bottom portion 14 (bottom plate portion 14a) is softened and deformed so as to deflect downward by the weight of the hot water and the contents. Can be prevented. In this state, the peripheral wall 10 of the container main body 1 (the peripheral wall main body 110, A space 40 is formed between the lower peripheral wall portion 10b) and the cylindrical portion 20 of the exterior body 2, so that a heat insulating effect can be obtained by conduction of heat (see FIG. 11). ).

[0102] According to the heat insulating container having the above-described configuration, when the external body 2 is gripped and an external force is applied to the external body 2 (the lower end) in the radial direction, the external force is directed toward the center of the cylindrical portion 20. (In the direction orthogonal to the center line of the cylindrical portion 20), and acts to reduce the diameter of the lower end opening edge of the cylindrical portion 20 or deform the flat portion into a flat shape. At the same time, the external force acts on the base end (outer peripheral edge) of the annular portion 21 toward the center of the tubular portion 20.

[0103] Then, since the annular portion 21 is formed in an annular shape that tapers toward the inner side of the cylindrical portion 20, external force acts on the annular portion 21 in a direction intersecting the annular portion 21. On the leading end side, a reaction force is generated in a direction having a different action direction (a direction of expanding the inner peripheral edge) with respect to an external force. Accordingly, a bending action occurs between the base end and the distal end of the annular portion 21, and the elastic force generated in the annular portion 21 by the bending prevents the cylindrical portion 20 from being deformed in the radial direction due to an external force. .

That is, in the heat insulating container, the annular portion 21 is provided to extend inside the cylindrical portion 20, and the distal end side is formed in a tapered shape so as to be separated from the inner peripheral surface of the cylindrical portion 20. When an elastic force is applied, an elastic force is generated in the annular portion 21, and the elasticity can be utilized to sufficiently obtain the radial strength at the lower end portion of the exterior body 2.

[0105] Further, in the heat insulating container, the horizontal annular portion 23 is extended at the tip of the annular portion 21 to enhance the strength near the inner peripheral edge of the annular portion 21, and the vicinity of the inner peripheral edge of the annular portion 21 by the reaction force against the external force. Is restricted from being deformed, so that more radial strength can be obtained. That is, the elasticity between the proximal end and the distal end of the annular portion 21 is effectively used against external force, so that the strength at the lower end side of the cylindrical portion 20 is increased. Therefore, also in the heat insulating container according to the present embodiment, when manufacturing the exterior body 2, the step of providing a bottom plate for closing the hole formed by the annular portion as in the related art is not required, and the manufacturing process for the heat insulating container is not required. Cost and material cost can be reduced.

[0106] In addition, the heat-insulating container has a configuration in which the annular portion 21 extends inward from the lower end of the cylindrical portion 20 with respect to the inner peripheral surface so that a concave portion is formed at the bottom. Therefore, it is possible to hold the heat-insulating container with the finger placed on the annular portion 21. Therefore, The heat container can be gripped in a stable state without slipping off. Even when the heat insulating container is held with a finger placed on the annular portion 21 in this manner, since the horizontal annular portion 23 extends from the inner peripheral edge (tip) of the annular portion 21, Even if hot foods are put in the container body 1 while the fingers cannot touch the bottom part 14 of the container body 1, it is safe without injuries such as burns.

[0107] Further, the heat insulating container according to the present embodiment has a rounded portion (bottom connection portion 14b) between the peripheral wall 10 and the bottom portion 14 of the container body 1 and has a cylindrical portion 20 of the exterior body 2. Therefore, it is possible to adopt a mode in which only the bottom plate portion 14a is supported by the horizontal annular portion 23, and the strength of the heat insulating container can be further increased.

Further, since the heat insulating container is provided with a plurality of vertical ribs 115 over substantially the entire area of the peripheral wall 10 of the container main body 1, when the outer casing 2 is gripped, the gripping force acts. Even if the exterior body 2 is deformed in the radial direction, the exterior body 2 comes into contact with the tip of the longitudinal rib 115, and a space 40 is always formed over substantially the entire area between the peripheral wall 10 and the exterior body 2, and the space 40 The heat insulation effect can always be maintained by heat conduction.

Further, similarly to the second embodiment, since the inner surface of the inner peripheral surface (bottom connection portion 14b) of the bottom portion 14 of the container body 1 is formed as a concave curved surface, the tip of the spoon is connected to the bottom portion 14. By following the inner peripheral surface of the container, the contents can be easily scooped without being left in the container body 1.

[0110] The heat insulating container of the present invention is not limited to the above-described first to third embodiments, and it goes without saying that various changes can be made without departing from the scope of the present invention.

[0111] In the first to third embodiments, the foamed resin sheet S for forming the exterior body 2 is constituted by a single sheet made of expanded polystyrene, but the foamed resin sheet S for molding the exterior body 2 is However, for example, a foamed polystyrene layer having a non-foamed resin layer formed on one side or both sides may be employed.

[0112] In this case, the expansion ratio and components of the expanded polystyrene layer are the same as those of the expanded polystyrene sheet of the above embodiment. The non-foamed resin layer may be made of a styrene-based resin such as polystyrene, styrene, butadiene copolymer, styrene-acrylic acid copolymer, or a mixture thereof, or a resin such as polyethylene or ethylene-butyl acetate copolymer. To Mixed styrene resins are preferred, but polyethylene and polypropylene resins can be used. The thickness of the non-foamed resin layer is preferably about 3-30 μ μη. The non-foaming resin layer may be formed by co-extrusion with the foaming resin sheet, or may be formed by laminating a separately formed film. In this case, printing can be performed on the non-foamed resin film.

[0113] The foamed resin sheet (foamed layer) is preferably made of the above-mentioned polystyrene-based resin because of its excellent heat insulating property and rigidity. A laminate with a shrinkable polyester film can also be used.

[0114] In the above-described embodiment, the horizontal annular portion 23 is extended at the tip (inner peripheral edge) of the annular portion 21. However, the present invention is not limited to this. It may be obtained at

[0115] In the first to third embodiments, the cylindrical portion 20 of the exterior body 2 has a smaller diameter toward the lower end side. The adopted force is not limited to this. Needless to say, the shape may be a true cylindrical shape or a rectangular tube shape.

[0116] In the first to third embodiments, the exterior body 2 is molded using the mold 50 and the press mold 51 having the above-described configuration in which the annular convex portion 53 is formed on the other end surface. It may be formed in a shape. That is, the mold 50 may have an outer peripheral surface forming the cylindrical portion 20 and may have a configuration in which the other end of the externally fitted cylindrical foamed resin sheet S can be pressed by the press mold 51. .

[0117] Further, as in the first to third embodiments, the annular convex portion 53 is also limited to the one formed so as to correspond to the inclination angle between the inner peripheral surface of the cylindrical portion 20 and the annular portion 21. It is not something. That is, since the exterior body 2 is formed from the heat-shrinkable foamed resin sheet S, when pressed by the press die 51, the shrinkage force acts on the tubular foamed resin sheet toward the center toward the center. Thus, the annular portion 21 conforming to the outer peripheral shape of the convex portion 54 can be formed. Therefore, since the annular portion 21 is not formed by the inner peripheral surface of the annular convex portion 53, if the convex portion 54 of the press die 51 is formed with high accuracy, the annular portion corresponding to the outer peripheral surface of the convex portion 54 is formed. 21 can be molded. [0118] In the second and third embodiments, the reinforcing piece 117 is provided at the lower edge of the peripheral wall main body 110 to increase the radial strength of the peripheral wall 10 of the container main body 1. For example, the peripheral wall 10 may be formed in a step shape to increase the radial strength. Even in this case, since the heat-insulating container is provided with the outer package 2, the gripping force at the time of gripping has sufficient strength so as not to directly act on the container body 1. However, from the viewpoint of safety and the like, it is preferable to provide the reinforcing piece 117 as in the second and third embodiments.

In the second and third embodiments, the bottom 14 (bottom plate 14 a) of the container body 1 is brought into contact with the horizontal annular portion 23 of the outer package 2 to support the container body 1. However, similarly to the first embodiment, which is not limited to this, a gap is formed between the horizontal annular portion 23 and the bottom plate portion 14a, and the peripheral wall 10 of the container body 1 and the cylindrical portion 20 of the exterior body 2 are formed. Of course, even if the air between them can be circulated to the outside.

[0120] In the second and third embodiments, the upper surface of the annular connection portion 111 is used as an eye for pouring hot water. The present invention is not limited to this. For example, the inner periphery of the container body 1 A convex ridge extending in the circumferential direction may be provided on the surface, and the convex ridge may be used as a score line. However, the crossing lines may be provided appropriately depending on the items that need not be provided.

In the second and third embodiments, the peripheral wall 10 is formed in a step shape. However, the present invention is not limited to this, and the peripheral wall 10 is substantially formed without providing a step from the upper end to the lower end. It may be formed in a true cylindrical shape or an inverted conical cylindrical shape. Even if the peripheral wall 10 is configured in this way, if the vertical rib 115 is provided so as to extend from the upper end to the lower end of the peripheral wall 10, the outer body can be gripped similarly to the second and third embodiments. Even if the ribs 2 are deformed, the presence of the vertical ribs 115 prevents the peripheral wall 10 and the exterior body 2 (cylindrical portion 20) from coming into close contact with each other. And heat insulation.

[0122] In the first embodiment, the annular portion 21 is provided so that the tip of the annular portion 21 is spaced from the bottom portion 14 of the container body 1, so that the air in the space 40 can be released to the outside. The bottom part 14 of the container body 1 is supported by the tip of the annular part 21 which is not limited to this. You can do it. In other words, since the cylindrical portion 20 (exterior body 2) is formed of a foamed resin, a sufficient heat insulating effect can be obtained without releasing the air in the space 40 to the outside. It is not necessary to allow the air in 40 to be released to the outside, and the necessary heat insulation effect may be obtained by taking into account the contents to be housed in container body 1 and the like.

[0123] In the second embodiment, the peripheral wall main body 110 of the upper peripheral wall 10a is formed by alternately forming the plurality of concave ridges 110a and the convex ridges 110b, but is not limited thereto. Of course, the peripheral wall body 110 may be set to have a uniform thickness. However, when the container body 1 of the heat insulation container is formed, in order to form the peripheral wall main body portion 110 efficiently and with stable quality, the peripheral wall main body portion 110 is constituted by the concave ridge 110a and the convex ridge 110b as in the second embodiment. It's better to do that. Therefore, the force formed so that the thickness of the peripheral wall 10 of the container main body 1 in the first embodiment is substantially uniform. The peripheral wall 10 of the container main body 1 is not limited to this. Similarly to the main body 110, the peripheral wall 10 may be formed by alternately forming a plurality of concave stripes and convex stripes.

In the second embodiment, the longitudinal rib 115 is provided on the lower peripheral wall portion 10b of the container main body 1. The force is not limited to this. The vertical rib 115 may be provided in the whole area. That is, when the vertical rib 115 is provided, it may be provided on at least one of the peripheral wall main body 110 and the lower peripheral wall 10b, preferably at least on the lower peripheral wall 10b. However, the thickness of the peripheral wall 10 of the container body 1 may be made substantially uniform as in the first embodiment, which does not necessarily require the vertical ribs 115 to be provided on the peripheral wall 10 of the container body 1.

Claims

The scope of the claims

[1] A bottomed cylindrical container body, and an exterior body formed from a heat-shrinkable foamed resin sheet and covering the peripheral wall of the container body, forming a space between the peripheral wall and the exterior body. In the heat insulation container described above, the exterior body includes a tubular portion facing the peripheral wall of the container body, and an annular portion extending inside the tubular portion with a lower end opening edge of the tubular portion as a base end. A heat insulating container, wherein the annular portion has a distal end side separated from an inner peripheral surface of the tubular portion as compared with a base end side.

2. The heat insulating container according to claim 1, wherein the exterior body further includes a horizontal annular portion extending toward a center of the tubular portion at a tip of the annular portion.

[3] The annular portion according to claim 1 or 2, wherein a tip of the annular portion is formed so as to have an interval with a bottom of the container body, and gas in the space is configured to be able to flow outside through a lower end opening of the cylindrical portion. Insulated container as indicated.