JP7044334B1 - Cold insulation box and cold insulation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold insulation box having an excellent degree of freedom in design, which can suitably exhibit a cold insulation function by ensuring a certain thickness while being lightweight, and can appropriately maintain a constant box shape. offer. SOLUTION: This is a cold insulation box 1 in which an accommodation space sp capable of accommodating articles is formed, and each of a bottom wall 11, a peripheral wall W, and a top wall 15 is an outer bubble sheet located at least on the outside. And an inner bubble sheet located inside the outer bubble sheet, and an intermediate foam sheet arranged between the outer bubble sheet and the inner bubble sheet. [Selection diagram] Fig. 2

Description

The present invention relates to a cold insulation box and a cold insulation structure.

Conventionally, a cold storage box having a storage space capable of storing food and drink and other articles has been known (see, for example, Patent Document 1).

In general, the walls (bottom wall, peripheral wall, top wall) constituting the cold insulation box are made of a hard resin material and have a certain thickness dimension in order to exhibit the cold insulation function. Therefore, it is difficult to adopt a lightweight structure for this type of cold storage box, and it cannot be said that it is suitable for carrying.

On the other hand, there is also an attempt to realize a certain cold insulation function by constructing the cold insulation box mainly of a relatively thin plate material. However, such a configuration has a weak shape-retaining property that can maintain a constant box shape, and tends to impair the workability of a user who puts in and takes out an article from the storage space.

Japanese Unexamined Patent Publication No. 2020-121741

The present invention has been made by paying attention to the above circumstances, and at least, it is possible to suitably exert a cold insulation function by ensuring a certain thickness while being lightweight, and a certain box. It is an object of the present invention to provide a cold insulation box having an excellent degree of freedom in design in which the shape can be suitably maintained, and a cold insulation structure including the cold insulation box.

That is, the present invention has the following configuration.

The invention according to claim 1 is a cold insulation box in which a storage space capable of accommodating articles is formed, a bottom wall, a peripheral wall erected on the peripheral edge of the bottom wall, and an upper end of the peripheral wall. It is provided with a top wall that can open and close the opening formed at the edge, and each of the bottom wall, the peripheral wall, and the top wall is at least an outer bubble sheet located on the outside, and the top wall thereof. It is provided with an inner bubble sheet located inside the outer bubble sheet and an intermediate foam sheet arranged between the outer bubble sheet and the inner bubble sheet. It has a cap film having a large number of protrusions, a back film fused to the protrusion open side of the cap film, and a liner film fused to the protrusion tip side of the cap film. The intermediate foam sheet is formed into a sheet shape while forming innumerable closed bubbles in polyethylene, and the top wall is provided with a cold insulation body holding portion capable of holding a cold insulation body. A reinforcing resin plate is provided on the top wall, the resin plate is arranged on the accommodation space side of the inner bubble sheet, and the cold insulation holding portion is the same. It is provided on the inward facing surface of the resin plate, and the top wall is formed by sewing the outer bubble sheet, the inner bubble sheet, and the peripheral edges of the resin plate to each other. The intermediate foam sheet is sandwiched between the outer and inner bubble sheets in a state where the intermediate foam sheet is not connected to the outer and inner bubble sheets, and when the top wall bends. In addition, it is a cold insulation box in which the intermediate foam sheet can move relative to the outer and inner bubble sheets .

The invention according to claim 2 is the cold insulation box according to claim 1, wherein a reinforcing resin plate is provided on the bottom wall.

In the third aspect of the present invention, the bottom wall and the top wall have a rectangular shape, and the peripheral wall has a rectangular front wall erected from the front end edge portion of the bottom wall. The bottom wall is provided with a rectangular left and right side wall erected from the left and right side edge portions, and a rectangular rear wall erected from the rear end edge portion of the bottom wall. The cold insulation box according to claim 1 or 2, wherein the top wall is rotatably connected to the upper end portion of the rear wall.

The invention according to claim 4 is configured to take a usable posture in which the article can be accommodated in the accommodation space and a folding posture in which the bottom wall and the top wall are brought close to each other by folding the peripheral wall. The cold insulation box is provided with horizontal sewing lines extending in the left-right direction at the middle portions in the vertical direction of the front wall and the rear wall, and is provided on the left and right side walls. A horizontal sewing line for bending guidance extending in the left-right direction is provided in each middle portion in the vertical direction, and an inclined stitch for bending guidance extending in the left and right side walls along a diagonal line is provided. The cold storage box according to claim 3 , which is provided with an attached wire.

The invention according to claim 5 is configured to take a usable posture in which the article can be accommodated in the accommodation space and a folding posture in which the front wall and the rear wall are brought close to each other by folding the peripheral wall. A cold insulation box provided with vertical sewn lines extending in the vertical direction at the middle portions of the left and right side walls in the front-rear direction, and the bottom wall can be used. 3. Claim 3 which is rotatably connected to the lower end portion of the rear wall so as to be able to take a substantially horizontal posture in the posture and to take an upright posture which can be attached to the inner surface side of the rear wall in the folded posture. The cold storage box described.

The invention according to claim 6 is the cold insulation box according to claim 5 , wherein a reinforcing resin plate is provided on the front wall.

The invention according to claim 7 is characterized by comprising an outer box capable of accommodating an article inside and a cold insulation box according to any one of claims 1 to 6 accommodated in the outer box. It is a cold insulation structure.

As described above, according to the present invention, at least, the design is such that the cold insulation function can be suitably exhibited by ensuring a certain thickness while being lightweight, and the constant box shape can be preferably maintained. It is possible to provide a cold insulation box having an excellent degree of freedom and a cold insulation structure including the cold insulation box.

The perspective view which shows one Embodiment (the first embodiment) of this invention. The perspective view in the same embodiment. FIG. 1 is a sectional view taken along line XX in FIG. FIG. 1 is a sectional view taken along line YY in FIG. FIG. 1 is a sectional view taken along line ZZ in FIG. The perspective view in the same embodiment. The perspective view in the same embodiment. The perspective view which shows the other embodiment (the second embodiment). The perspective view in the same embodiment. The perspective view in the same embodiment. The perspective view in the same embodiment. FIG. 8 is a sectional view taken along line QQ in FIG.

Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 7.

As shown in FIG. 7, the cold insulation box 1 of this embodiment constitutes a cold insulation structure H that can suitably convey an article (not shown) while keeping it cold in cooperation with the outer box N. It has become a thing.

<Cold insulation structure H>
The cold insulation structure H includes an outer box N in which an accommodation space sp capable of accommodating an article is formed, and a cold insulation box 1 which is an inner box accommodated in the outer box N. Since the outer box N has a substantially square box shape and has a space (cold box accommodating space sk) that can accommodate the cold insulation box 1 inside, detailed description thereof will be omitted.

<Cold box 1>
The cold storage box 1 can have a substantially square box-like appearance. In the cold insulation box 1, a storage space sp capable of accommodating an article to be kept cold is formed inside.

Here, as a specific example of the "article" housed in the cold storage box 1, for example, a food and drink product that is suitable to be kept cold can be mentioned, but the food and drink product is not limited to the food and drink product. It doesn't matter what it is.

The cold insulation box 1 includes a bottom wall 11, a tubular peripheral wall W erected on the peripheral edge of the bottom wall 11, and a top wall 15 capable of opening and closing an opening G formed at the upper end edge of the peripheral wall W. It is prepared.

The bottom wall 11 and the top wall 15 have a horizontally long substantially rectangular shape. The bottom wall 11 and the top wall 15 have substantially the same size. The top wall 15 is rotatably connected to the upper end portion of the rear wall 14 whose rear end thereof constitutes the peripheral wall W.

The peripheral wall W has a substantially square cylinder shape. The peripheral wall W has a substantially rectangular front wall 12 erected from the front end edge of the substantially rectangular bottom wall 11 and a substantially rectangular shape erected from the left and right side edge portions of the bottom wall 11. The left and right side walls 13 are provided with a substantially rectangular rear wall 14 erected from the rear end edge of the bottom wall 11.

As shown in FIGS. 1, 2, and 7, the cold storage box 1 has a usable posture (U) capable of accommodating an article in the accommodating space sp, and the peripheral wall W is folded inward as shown in FIG. As a result, it is configured to be able to take a folded posture (F) in which the bottom wall 11 and the top wall 15 are brought close to each other while maintaining a substantially parallel mutual posture between the bottom wall 11 and the top wall 15. In other words, the cold storage box 1 can be folded to take a compact folding posture (F) when not in use.

Hereinafter, each configuration of the cold storage box 1 will be described in detail.

<Bottom wall 11>
As shown in FIG. 4, the bottom wall 11 has an outer bubble sheet A located on the outer side (lower side), an inner bubble sheet B located on the inner side (upper side) of the outer bubble sheet A, and an outer side. It is provided with an intermediate foam sheet C arranged between the bubble sheet A and the inner bubble sheet B, and a reinforcing resin plate arranged on the inner surface side (upper side) of the inner bubble sheet B. ..

The outer bubble sheet A constituting the bottom wall 11 has a so-called three-layer structure in which a plurality of air-sealed chambers ar are formed. The thickness dimension of the outer bubble sheet A is set to about 2 to 3 mm. The outer bubble sheet A includes a cap film fa having a large number of protrusions t, a back film fb fused to the protrusion open side of the cap film fa, and a liner film fc fused to the protrusion tip side of the cap film fa. And have. In the outer bubble sheet A, a plurality of air-sealed chambers ar are arranged between the back film fb and the liner film fc by the cooperation of the cap film fa, the back film fb, and the liner film fc. ing.

As the outer bubble sheet A in this embodiment, one whose outer surface is covered with an aluminum layer is used. That is, an aluminum-deposited film having aluminum fine particles adhered to the outer surface is applied to the back film fb and the liner film fc of the outer bubble sheet A.

The inner bubble sheet B constituting the bottom wall 11 has the same structure as the outer bubble sheet A. That is, the inner bubble sheet B has a three-layer structure composed of a cap film fa, a back film fb, and a liner film fc.

The intermediate foamed sheet C constituting the bottom wall 11 is in the form of a sheet formed of a closed cell foam. The thickness of the intermediate foam sheet C is set to about 3 mm. More specifically, the intermediate foamed sheet C is continuously extruded into a sheet shape while forming innumerable closed cells in polyethylene, and has air spring-like cushioning properties and moderate slipperiness and elongation. It has characteristics and is excellent in heat insulation, moisture resistance, and waterproofness.

The reinforcing resin plate constituting the bottom wall 11 has a substantially horizontal plate shape. The resin plate is made of polypropylene having a substantially rectangular shape and a thickness dimension of about 1 mm. The upper surface of the reinforcing resin plate D1 can function as a mounting surface for articles, and articles accommodated in the accommodation space sp can be stably placed on the bottom wall 11.

The bottom wall 11 is formed by sewing the peripheral edge portion of the outer bubble sheet A, the peripheral edge portion of the inner bubble sheet B, and the peripheral edge portion of the resin plate D1 to each other. The intermediate foam sheet C located between the outer bubble sheet A and the inner bubble sheet B is not connected to the outer and inner bubble sheets A and B, and the outer and inner bubble sheets C are not connected to the outer and inner bubble sheets A and B. It is sandwiched between A and B.

In other words, the intermediate foam sheet C of the bottom wall 11 is in a state of not being non-movably adhered to the outer and inner bubble sheets A and B by using an adhesive or the like. Therefore, when the bottom wall 11 bends, the intermediate foam sheet C can move (shift) relative to the outer and inner bubble sheets A and B. With this configuration, the bottom wall 11 has flexibility that allows constant bending in the thickness direction.

Band members 16 forming a band are provided on both sides of the intermediate portion in the front-rear direction of the bottom wall 11. The base end portion of the band member 16 is sewn to the bottom wall 11. The band member 16 is provided with one hook-and-loop fastener element mf1 on one side. As shown in FIG. 6, when the cold insulation box 1 is in the folded posture (F), the tip end portion of the band member 16 is adhered to the other surface fastener element mf2 which is an adhesive portion provided on the upper surface of the top wall 15. It is supposed to get. As a result, the cold storage box 1 can maintain the folded posture (F) when not in use.

<Front wall 12>
As shown in FIG. 5, the front wall 12 constituting the peripheral wall W has an outer bubble sheet A located on the outer side (front side) and an inner bubble sheet A located on the inner side (rear side) of the outer bubble sheet A. B is provided with an intermediate foam sheet C arranged between the outer bubble sheet A and the inner bubble sheet B.

Since the outer and inner bubble sheets A and B and the intermediate foam sheet C constituting the front wall 12 have the same configuration as that described in the bottom wall 11, detailed description thereof will be omitted.

A horizontal sewing line I for guiding bending is provided in the middle portion in the vertical direction of the front wall 12 so as to extend in the left-right direction.

The lower end edge of the front wall 12 is sewn to the front end edge of the bottom wall 11 together with the strip-shaped edging tape material p. Further, the left and right side edge edges of the front wall 12 are sewn to the front edge edges of the left and right side wall 13 together with the strip-shaped edging tape material p.

From the upper end edge of the front wall 12, a front extension plate 17 having one surface fastener element mf1 for adhering the front end edge of the top wall 15 is extended. The base end edge of the front extension plate 17 is sewn to the upper end edge of the front wall 12 together with the strip-shaped edging tape material p.

<Left and right side walls 13>
The left and right side walls 13 constituting the peripheral wall W are an outer bubble sheet A located on the outside, an inner bubble sheet B located inside the outer bubble sheet A, an outer bubble sheet A, and an inner bubble sheet. It is provided with an intermediate foam sheet C arranged between B and B.

Since the outer and inner bubble sheets A and B and the intermediate foam sheet C constituting the left and right side walls 13 have the same configuration as that described in the bottom wall 11, detailed description thereof will be omitted.

Horizontal sewing lines J for bending guidance extending in the left-right direction are provided at the intermediate portions in the vertical direction on the left and right side walls 13. Further, the left and right side walls 13 are provided with inclined sewing lines K for bending guidance extending along a diagonal line.

The left and right side walls 13 are continuously provided from the bottom wall 11. That is, the lower end edges of the left and right side walls 13 are continuous with the bottom wall 11.

The trailing edge of the left and right side walls 13 is sewn to the side edge of the trailing wall 14 together with the strip-shaped edging tape material p.

From the upper end edges of the left and right side walls 13, left and right extension plates 18 having one surface fastener element mf1 for adhering the left and right side edge edges of the top wall 15 are extended. The base end edges of the left and right extension plates 18 are sewn to the upper end edges of the left and right side walls 13 together with the strip-shaped edging tape material p.

<Rear wall 14>
The rear wall 14 constituting the peripheral wall W includes an outer bubble sheet A located on the outer side (rear side), an inner bubble sheet B located on the inner side (front side) of the outer bubble sheet A, and an outer bubble sheet. It is provided with an intermediate foam sheet C arranged between A and the inner bubble sheet B.

Since the outer and inner bubble sheets A and B and the intermediate foam sheet C constituting the rear wall 14 have the same configuration as that described in the bottom wall 11, detailed description thereof will be omitted.

A horizontal sewing line L for guiding bending is provided in the middle portion in the vertical direction of the rear wall 14 so as to extend in the left-right direction.

The lower end edge of the rear wall 14 is sewn to the rear end edge of the bottom wall 11 together with the strip-shaped edging tape material p. Further, the left and right side edge edges of the rear wall 14 are sewn to the rear edge edges of the left and right side walls 13 together with the strip-shaped edging tape material p.

The top wall 15 is continuously extended from the upper end edge of the rear wall 14. That is, the top wall 15 is continuous with the upper end edge of the rear wall 14.

<Top wall 15>
As shown in FIG. 3, the top wall 15 has an outer bubble sheet A located on the outer side (upper side), an inner bubble sheet B located on the inner side (lower side) of the outer bubble sheet A, and an outer side. It is provided with an intermediate foam sheet C arranged between the bubble sheet A and the inner bubble sheet B, and a reinforcing resin plate D2 arranged on the inner surface side (lower side) of the inner bubble sheet B. Is.

Since the outer and inner bubble sheets A and B and the intermediate foam sheet C constituting the top wall 15 have the same configuration as that described in the bottom wall 11, detailed description thereof will be omitted.

The reinforcing resin plate D2 constituting the top wall 15 has a substantially horizontal plate shape. The resin plate D2 is made of polypropylene having a substantially rectangular shape and a thickness dimension of about 1 mm. The reinforcing resin plate D2 can function as a suppressor for the entire top wall 15 from hanging down.

A strip-shaped edging tape material p is sewn on the front edge and the left and right side edges of the top wall 15. A picking piece 19 used for opening and closing the top wall 15 is provided at the central portion in the left-right direction at the front end edge of the top wall 15.

Further, on the inner surface side of the front end portion of the top wall 15 and the inner surface side of the left and right side end portions, the other hook-and-loop fastener that can be adhered to the front extension plate 17 and the left and right extension plates 18 provided on the peripheral wall W. The element mf2 is provided.

The top wall 15 is provided with a cold insulation body holding portion E capable of holding the cold insulation body R. In this embodiment, the cold insulation body holding portion E is provided on the resin plate of the top wall 15. The resin plate on the top wall 15 is arranged on the accommodation space sp side with respect to the inner bubble sheet B, and the cold insulation body holding portion E is provided on the inward facing surface of the resin plate.

The cold insulation body holding portion E is a net that is sewn to the resin plate D2 of the top wall 15 and can form a bag-shaped portion that can accommodate the cold insulation body R having a substantially rectangular shape in cooperation with the resin plate D2. The cold insulation body R provided in the opening V formed between the material e1 and the front end edge which is one end edge of the net material e1 and the resin plate D2 is suppressed so as not to jump out to the outside. It is provided with the pop-out suppressing member e2 to be obtained. In this embodiment, the net material e1 has left and right side edge portions and trailing edge portions sewn to the resin plate D2. Further, the pop-out suppressing member e1 is provided with a retaining band e21 whose base end portion is sewn to the resin plate D2 and whose tip end portion can be connected to a surface fastener element (not shown) provided on the front end edge of the net material e1. be.

The cold insulation body R accommodated in the cold insulation body holding portion E is for realizing a low temperature environment of the accommodation space sp. The cold insulation body R may be any one as long as it can realize a low temperature environment of the accommodation space sp, but in this embodiment, the cold insulation body R is ICEENERGY (registered trademark) manufactured by Atom Giken Co., Ltd. ) Is used.

The top wall 15 is configured by sewing the peripheral edge portion of the outer bubble sheet A, the peripheral edge portion of the inner bubble sheet B, and the peripheral edge portion of the resin plate D2. The intermediate foam sheet C located between the outer bubble sheet A and the inner bubble sheet B is not connected to the outer and inner bubble sheets A and B, and the outer and inner bubble sheets C are not connected to the outer and inner bubble sheets A and B. It is sandwiched between A and B.

In other words, the intermediate foam sheet C of the top wall 15 is in a state of not being non-movably adhered to the outer and inner bubble sheets A and B by using an adhesive or the like. Therefore, when the top wall 15 bends, the intermediate foam sheet C can move (shift) relative to the outer and inner bubble sheets A and B. With this configuration, the top wall 15 has flexibility that allows constant bending in the thickness direction.

As described above, the cold storage box 1 according to the present embodiment has a storage space sp formed inside which can store articles. Then, the cold insulation box 1 includes a bottom wall 11, a peripheral wall W erected on the peripheral edge of the bottom wall 11, and a top wall 15 capable of opening and closing an opening V formed at the upper end edge of the peripheral wall W. It is prepared. Each of the bottom wall 11, the peripheral wall W, and the top wall 15 has an outer bubble sheet A located on the outside, an inner bubble sheet B located inside the outer bubble sheet A, and an outer bubble sheet A. It is provided with an intermediate foam sheet C arranged between the bubble wrap sheet B and the bubble wrap sheet B inside.

Therefore, the cold insulation function can be suitably exhibited by ensuring a certain thickness while being lightweight by utilizing the outer and inner bubble sheets A and B in which a plurality of air-sealed chambers ar are arranged. By providing the intermediate foam sheet C between the outer and inner bubble sheets A and B, the cold insulation box 1 having an excellent degree of freedom in design can be provided in which a constant box shape can be suitably maintained in cooperation with each other. It will be something that can be done.

That is, since the outer and inner bubble sheets A and B are formed with a plurality of air-sealed chambers ar, which are bubble portions in which air is sealed between the back film fb and the liner film fc, respectively, a certain thickness is secured. Not only is it easy, but it also has excellent heat insulation.

Further, due to the presence of the plurality of air-sealed chambers ar, the outer and inner bubble sheets A and B also have excellent cushioning properties for the articles housed in the cold insulation box 1, and thus damage the transported articles. It is difficult to do. By arranging the intermediate foam sheet C between the outer and inner bubble sheets A and B, an appropriate bending strength (stiffness) can be given to the bottom wall 11. The effect is not limited to the bottom wall 11, but is similarly exerted on other walls (front wall 12, left and right side walls 13, rear wall 14, and top wall 15).

The top wall 15 is provided with a cold insulation body holding portion E capable of holding the cold insulation body R. Therefore, by holding the cold insulation body R in the cold insulation body holding portion E, the cold air can be lowered from the upper side to the lower side, the accommodation space sp can be appropriately cooled, and the accommodation space sp can be cooled to a constant temperature. It is possible to maintain a suitable state.

A reinforcing resin plate D2 is provided on the top wall 15. Therefore, by holding the cold insulation body R, it is possible to preferably suppress the central portion of the top wall 15 from hanging excessively downward.

The resin plate D2 on the top wall 15 is arranged on the accommodation space sp side with respect to the inner bubble sheet B, and the cold insulation body holding portion E is provided on the inward facing surface of the resin plate D2. Therefore, not only is it easy to provide the cold insulation body holding portion E for holding the relatively heavy cold insulation body R with respect to the top wall 15, but also the cold insulation body holding portion E effectively uses the cold air from the cold insulation body R. It is arranged in a suitable position that can be introduced into the accommodation space sp.

The top wall 15 is formed by sewing the peripheral edges of the outer bubble sheet A, the inner bubble sheet B, and the resin plate D2 to each other. Then, the intermediate foam sheet C is sandwiched between the outer and inner bubble sheets A and B in a state where the intermediate foam sheet C is not connected to the outer and inner bubble sheets A and B. Therefore, the top wall 15 can flexibly tolerate a certain amount of bending due to use, and is excellent in usability for the user who opens and closes the accommodation space sp.

The intermediate foam sheet C is formed of a closed cell foam. Therefore, the intermediate foam sheet C has excellent heat insulating properties.

A reinforcing resin plate D1 is provided on the bottom wall 11. Therefore, the bottom wall 11 can stably place an article to be kept cold.

The bottom wall 11 and the top wall 15 have a rectangular shape. Then, the peripheral wall W has a rectangular front wall 12 erected from the front end edge portion of the bottom wall 11 and a rectangular left and right side wall 13 erected from the left and right side edge portions of the bottom wall 11. And a rectangular rear wall 14 erected from the rear end edge of the bottom wall 11. Further, the top wall 15 is rotatably connected to the upper end portion of the rear wall 14.

Therefore, the cold storage box 1 has a rectangular box shape and is excellent in handling by the user.

The cold storage box 1 can take a usable posture (U) in which an article can be stored in the storage space sp, and a folded posture (F) in which the bottom wall 11 and the top wall 15 are brought close to each other by folding the peripheral wall W. It is composed of. Further, horizontal sewing lines I for bending guidance extending in the left-right direction are provided at the intermediate portions in the vertical direction of the front wall 12 and the rear wall 14. Further, horizontal sewing lines J for bending guidance extending in the left-right direction are provided in the middle portions of the left and right side walls 13 in the vertical direction, and the left and right side walls 13 extend diagonally. An inclined sewing line K for inducing bending is provided.

Therefore, the cold insulation box 1 is easily bent in an orderly manner with reference to the horizontal sewing lines I and J for bending guidance and the inclined sewing line K when not in use, so that the top wall 15 and the bottom wall 11 are formed. It is possible to take a compact folding posture (F) without damaging.

Further, since the cold insulation structure H includes an outer box N capable of accommodating articles inside and a cold insulation box 1 accommodated in the outer box N, the cold insulation structure H is excellent in convenience of transportation. ing.

The present invention is not limited to the embodiment described in detail above.

Subsequently, the cold storage box 1 which is the second embodiment will be described with reference to FIGS. 8 to 12. Note that FIGS. 8 to 11 schematically show the cold storage box 1.

The cold storage box 1 according to the second embodiment can take a folding posture (F) different from that of the first embodiment. The cold insulation box 1 of the second embodiment mainly has a bottom wall 11 and a peripheral wall W (front wall 12, left and right side walls 13, rear wall 14) as compared with that of the first embodiment. Is different.

As shown in FIG. 8, the cold insulation box 1 is fronted by a usable posture (U) capable of accommodating an article in the accommodation space sp and by folding the left and right side walls 13 of the peripheral wall W inward as shown in FIG. It is configured to be able to take a folded posture (F) in which the front wall 12 and the rear wall 14 are brought close to each other while maintaining a substantially parallel mutual posture of the wall 12 and the rear wall 14.

The bottom wall 11 is located at the lower end of the rear wall 14 so that it can take a substantially horizontal posture in the usable posture (U) and an upright posture that can be attached to the inner surface side of the rear wall 14 in the folded posture (F). It is rotatably connected. The rear end portion of the bottom wall 11 is connected to the lower end portion of the rear wall 14, and the front end portion and the left and right side end portions of the bottom wall 11 are configured to be detachable from the lower end portion of the peripheral wall W. That is, the bottom wall 11 is configured to be rotatable between a horizontal posture and an upright posture with respect to the rear wall 14 with the rear end portion as the center.

Instead of the rear end portion of the bottom wall 11, the front end portion of the bottom wall 11 may be connected to the lower end portion of the front wall 12.

The bottom wall 11 is such that an article can be placed on the upper surface in the usable posture (U). In the bottom wall 11 in the usable posture (U), one surface fastener element mf1 having a band shape provided at the front end portion of the bottom wall 11 is provided with the other surface fastener element mf1 provided on the inner surface side of the lower end portion of the front wall 12. By adhering to (not shown), a substantially horizontal posture can be maintained.

As the means for maintaining the horizontal posture of the bottom wall 11, a means having an appropriate configuration can be applied. Further, as a means for preventing a gap from being formed between the bottom wall 11 in the horizontal posture and the peripheral wall W, an appropriate configuration can be applied.

The front wall 12 maintains a flat plate shape even in the folded posture (F), and is not provided with a sewn line for bending guidance. That is, the front wall 12 in the second embodiment is not provided with the horizontal sewing line I as in the first embodiment.

The front wall 12 is provided with a reinforcing resin plate D3. That is, as shown in FIG. 12, the front wall 12 of this embodiment has an outer bubble sheet A located on the outer side (front side) and an inner bubble sheet located on the inner side (rear side) of the outer bubble sheet A. An intermediate foam sheet C arranged between the sheet B, the outer bubble sheet A and the inner bubble sheet B, and a reinforcing resin plate arranged between the outer bubble sheet A and the intermediate foam sheet C. It is equipped with D3. A band member 2 provided with a hook-and-loop fastener (not shown) is attached to the left and right side ends of the front wall 12. The band member 2 has a base end portion sewn to the front wall 12, and the tip end portion can be fastened to the bottom wall 11 in the folded posture (F).

Since the resin plate D3 for reinforcement is provided on the front wall 12, the shape of the cold insulation box 1 can be used by moving the front wall 12 back and forth with respect to the rear wall 14 in a usable posture (U) and a folded posture (F). ) And it is easy to deform.

Vertically sewn lines nu for bending guidance extending in the vertical direction are provided in the middle portions of the left and right side walls 13 in the front-rear direction. Only the vertical sewing line nu is provided on the left and right side walls 13 in the second embodiment as the sewing line for bending guidance, and the horizontal sewing line J and the inclined sewing as in the first embodiment are provided. The plumb bob K is not provided.

The rear wall 14 maintains a flat plate shape even in the folded posture (F), and is not provided with a sewn line for bending guidance. That is, the rear wall 14 in the second embodiment is not provided with the horizontal sewing line L as in the first embodiment.

An example of the procedure for transforming the cold storage box 1 in the second embodiment from the usable posture (U) to the folded posture (F) is as follows.

First, as shown in FIG. 8, the top wall 15 is changed from the horizontal posture to another posture (for example, the standing posture) in order to open the accommodation space sp of the cold insulation box 1. The top wall 15 is configured to be rotatable with respect to the rear wall 14 around the rear end portion, and the change to another posture is performed, for example, by picking the picked piece 19 and pulling it upward. ..

Next, as shown in FIG. 9, the strip-shaped surface fastener element mf1 is separated from the front wall 12 to release the connection state between the bottom wall 11 and the front wall 12, and then the front end portion of the bottom wall 11 is moved upward. The bottom wall 11 is changed from the horizontal posture to the standing posture by pulling it up to the center and rotating it around the rear end portion. When the bottom wall 11 shifts to the upright posture, the bottom wall 11 is attached to the inner surface side of the rear wall 14.

Subsequently, as shown in FIG. 10, a rectangular plate-like shape is formed without bending the front wall 12 and the rear wall 14 while bending the left and right side walls 13 inward with reference to the vertical sewing line nu for bending guidance. Move in the opposite direction while maintaining it. As a result, the storage space sp is almost completely eliminated from the cold storage box 1, and the cold storage box 1 takes a form of being compactly compressed in the front-rear direction as a whole.

After that, as shown in FIG. 11, the top wall 11 is moved to a position along the outer surface of the rear wall 14. Then, the band members 2 provided at the left and right side ends of the front wall 12 are fastened to the other surface fastener element mf2 provided on the left and right side ends of the top wall 11.

Through the above procedure, the cold insulation box 1 utilizes the bottom wall 11 and the top wall 15 that can flap with respect to the rear wall 14, and the vertical sewn wires nu for bending guidance provided on the left and right side walls 13. , The front wall 12, the rear wall 14, and the top wall 15 and the bottom wall 11 can take a compact folding posture (F) without impairing the basic rectangular plate shape.

Needless to say, the specific configuration of each part is not limited to each of the above-described embodiments.

The bottom wall and the top wall are not limited to rectangular ones. Further, the peripheral wall may not have a square cylindrical shape.

The cold insulation body holding portion is not limited to the one provided on the lower surface of the top wall, and may be provided in relation to the top wall.

Needless to say, as the reinforcing resin plate applied to the top wall, a resin plate having an appropriate material and thickness can be applied.

In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 ... Cold storage box 11 ... Bottom wall 12 ... Front wall 13 ... Left and right side walls 14 ... Rear wall 15 ... Top wall A ... Outer bubble sheet B ... Inner bubble sheet C ... Intermediate foam sheet D1 ... (Bottom wall) resin Plate D2 ... Resin plate (on the top wall) E ... Cold insulation holder W ... Peripheral wall

Claims (7)

It is a cold storage box with a storage space that can store goods inside.
It is provided with a bottom wall, a peripheral wall erected on the peripheral edge of the bottom wall, and a top wall that can open and close the opening formed at the upper end edge of the peripheral wall.
Each of the bottom wall, the peripheral wall, and the top wall has at least an outer bubble sheet located on the outside, an inner bubble sheet located inside the outer bubble sheet, and the outer bubble sheet. It is provided with an intermediate foam sheet arranged between the bubble wrap sheet and the bubble wrap sheet inside .
The bubble sheet has a cap film having a large number of protrusions, a back film fused to the protrusion open side of the cap film, and a liner film fused to the protrusion tip side of the cap film. It is a thing
The intermediate foam sheet is formed into a sheet shape while forming innumerable closed cells in polyethylene.
The top wall is provided with a cold insulation body holding portion capable of holding the cold insulation body.
A reinforcing resin plate is provided on the top wall, and the resin plate is arranged on the accommodation space side of the inner bubble sheet.
The cold insulation holding portion is provided on the inward facing surface of the resin plate.
The top wall is formed by sewing the outer bubble sheet, the inner bubble sheet, and the peripheral edges of the resin plate to each other.
The intermediate foam sheet is sandwiched between the outer and inner bubble sheets in a state where the intermediate foam sheet is not connected to the outer and inner bubble sheets.
A cold insulation box in which the intermediate foam sheet can move relative to the outer and inner bubble sheets when the top wall bends . The cold insulation box according to claim 1, wherein a reinforcing resin plate is provided on the bottom wall. The bottom wall and the top wall have a rectangular shape.
The peripheral wall has a rectangular front wall erected from the front end edge of the bottom wall, rectangular left and right side walls erected from the left and right side end edges of the bottom wall, and the bottom. It is equipped with a rectangular rear wall that stands from the rear edge of the wall.
The cold storage box according to claim 1 or 2, wherein the top wall is rotatably connected to the upper end portion of the rear wall. A cold storage box configured to have a usable posture in which the article can be accommodated in the accommodation space and a folding posture in which the bottom wall and the top wall are brought close to each other by folding the peripheral wall.
Horizontal sewing lines for bending guidance extending in the left-right direction are provided at the intermediate portions of the front wall and the rear wall in the vertical direction.
Horizontal sewing lines for bending guidance extending in the left-right direction are provided at the middle portions in the vertical direction on the left and right side walls.
The cold insulation box according to claim 3 , wherein the left and right side walls are provided with an inclined sewn line for bending guidance extending along a diagonal line. A cold storage box configured to have a usable posture in which the article can be accommodated in the accommodation space and a folding posture in which the front wall and the rear wall are brought close to each other by folding the peripheral wall.
A vertical sewn line for bending guidance extending in the vertical direction is provided at the middle portion of each of the left and right side walls in the front-rear direction.
The bottom wall is rotatably connected to the lower end of the rear wall so that it can take a substantially horizontal posture in the usable posture and an upright posture that can be attached to the inner surface side of the rear wall in the folded posture. The cold storage box according to claim 3 . The cold insulation box according to claim 5 , wherein a reinforcing resin plate is provided on the front wall. A cold insulation structure comprising an outer box capable of accommodating an article inside and a cold insulation box according to any one of claims 1 to 6 accommodated in the outer box.

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