Heat insulating cooler bag

Abstract

To provide a new heat insulating cooler bag whose lid can be easily opened and closed.SOLUTION: The heat insulating cooler bag includes a body and a lid. In the closed state, the side walls of the lid are arranged around the side walls of the body. The first wall portion 210 of the side wall has a first first outer covering member 211 facing the fifth wall portion 410 of the lid in the closed state, a first second outer covering member 212 on the opposite side, and a first core member 213 between the two. The first surface 213a of the first core member 213 is in surface contact with the first outer cover member 211, and the first outer cover member 211 is bent into the shape of the first engagement recess 213a and / or the first engagement protrusion 213a1 of the first surface 213a1 of the first core member 213. In the closed state, the fifth engaging protruding portion 414 of the fifth wall portion 410 is removably fitted into the first engaging recessed portion 213a1, and / or the first engaging protruding portion 213a2 is removably fitted into the fifth engaging recessed portion 415 of the fifth wall portion 410.SELECTED DRAWING: Figure 1D

Description

[Technical Field]

[0001] The present invention relates to a heat and cold insulation bag. [Background technology]

[0002] Patent Document 1 below describes a conventional insulated / cold bag. This insulated / cold bag has a main body and a lid. The main body has a rectangular bottom and substantially rectangular cylindrical side walls. The side walls have four walls extending upward from the four sides of the bottom. The four walls are integrally connected to form a substantially rectangular cylindrical shape. The lid is rectangular, with one side connected to the top end of one of the four walls and the remaining three sides connected to the top ends of the remaining three walls with fasteners so as to be freely opened and closed. The bottom and side walls each consist of a flexible surface layer made of nylon canvas, a flexible backing layer made of a synthetic resin sheet such as polyvinyl chloride resin, and a flexible insulating sheet such as a foamed polyurethane sheet interposed between the two. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3027588 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional thermal insulation and cooling bags, the remaining three sides of the lid are connected to the top ends of the remaining three walls with fasteners that allow for free opening and closing, so the lid cannot be opened unless the fasteners are fully opened.

[0005] The present invention provides a novel heat / cold insulation bag whose lid can be easily opened and closed. [Means for solving the problem]

[0006] A thermal insulation / cooler bag according to one aspect of the present invention includes a substantially cylindrical main body with a bottom that is open on one side in a first direction, and a lid. The main body has a bottom and a substantially cylindrical side wall extending from the bottom in one direction in the first direction. The lid has a ceiling and a side wall extending from the ceiling in the other direction in the first direction. The side wall of the lid is arranged around the side wall of the main body when the lid is in a closed state, covering the opening of the main body.

[0007] One of the side walls of the main body and the lid has a first wall portion on one side in a second direction that is substantially perpendicular to the first direction, and the other side wall has a fifth wall portion on one side in the second direction.

[0008] The first wall portion has a first flexible outer covering material that faces the fifth wall portion in the closed state, a first flexible second outer covering material on the opposite side, and a first core material disposed between the first flexible outer covering material and the first flexible second outer covering material. The first core material has a first surface facing the first flexible outer covering material. A first engaging recess and / or a first engaging protrusion is provided on the first surface of the first core material. The first surface of the first core material comes into direct or indirect surface contact with the first flexible outer covering material, causing the first flexible outer covering material to flex according to the shape of the first engaging recess and / or the first engaging protrusion of the first core material.

[0009] The fifth wall portion has a fifth engaging protrusion that protrudes toward the first wall portion in the closed state and / or a fifth engaging recess that is recessed on the opposite side to the first wall portion in the closed state.

[0010] In the closed state, the fifth engaging protrusion of the fifth wall portion fits removably into the first engaging recess of the first wall portion in the first direction, and / or the first engaging protrusion of the first wall portion fits removably into the fifth engaging recess of the fifth wall portion in the first direction. [Effects of the Invention]

[0011] In the thermal insulation / cooler bag according to one aspect of the present invention, the first surface of the first core directly or indirectly comes into surface contact with the first first outer cover material, causing the first first outer cover material to flex in accordance with the shape of the first engaging recess and / or first engaging protrusion of the first core. Therefore, even if the first outer cover material and the first inner cover material of the first wall portion are made of a flexible material, the first engaging recess and / or first engaging protrusion of the first core can be exposed through the first outer cover material. In this way, a novel thermal insulation / cooler bag was obtained. Furthermore, the fifth engaging protrusion of the fifth wall portion removably fits into the first engaging recess of the first wall portion in the first direction, and / or the first engaging protrusion of the first wall portion removably fits into the fifth engaging recess of the fifth wall portion in the first direction, thereby maintaining the closed state in which the lid covers the opening of the main body. The fifth engaging protrusion of the fifth wall portion fits into the first engaging recess of the first wall portion so as to be insertable and detachable in the first direction, and / or the first engaging protrusion of the first wall portion fits into the fifth engaging recess of the fifth wall portion so as to be insertable and detachable in the first direction, which makes it easy to attach and detach the lid to and from the main body, and as a result, makes it easy to open and close the lid. [Brief explanation of the drawings]

[0012] [Figure 1A] 1 is a schematic perspective view of a heat and cold insulation bag according to a first embodiment of the present invention. [Figure 1B] 1 is a schematic front view of a heat / cold insulation bag according to a first embodiment. FIG. [Figure 1C] 1 is a schematic side view of a heat / cold insulation bag according to a first embodiment. FIG. [Figure 1D] 1D-1D cross-sectional view of the thermal insulation / cooler bag of Example 1 in FIG. 1B. FIG. [Figure 1E] 1B is a cross-sectional view of the thermal insulation / cooler bag of Example 1 taken along line 1E-1E in FIG. 1A. FIG. [Figure 2A] 1 is a schematic perspective view of the main body, liner, and auxiliary insulating part of the thermal insulation / cold insulation bag of Example 1. FIG. [Figure 2B] 1 is a schematic front view of the main body of the thermal insulation / cold insulation bag of Example 1. FIG. [Figure 2C] 1 is a schematic side view of the main body of the thermal insulation / cold insulation bag of Example 1. FIG. [Figure 2D]1D is a cross-sectional view of the main body of the thermal insulation / cold insulation bag of Example 1. FIG. [Figure 2E] 1B is a cross-sectional view of the main body of the thermal insulation / cold insulation bag of Example 1, corresponding to FIG. 1E. [Figure 3A] FIG. 2 is a schematic front view of the lid of the thermal insulation / cold insulation bag of Example 1. [Figure 3B] 1 is a schematic side view of the lid of the thermal insulation / cold insulation bag of Example 1. FIG. [Figure 3C] FIG. 2 is a schematic perspective view of an inverted lid of the thermal insulation / cooler bag of Example 1. [Figure 3D] 1D is a cross-sectional view of the lid of the thermal insulation / cold insulation bag of Example 1. FIG. [Figure 3E] 1B is a cross-sectional view of the lid of the thermal insulation / cold insulation bag of Example 1, corresponding to FIG. 1E. [Figure 4A] FIG. 1D is a cross-sectional view of a heat and cold insulation bag according to a second embodiment of the present invention. [Figure 4B] FIG. 1B is a cross-sectional view of the thermal insulation / cooler bag of Example 2, corresponding to FIG. 1E. [Figure 5A] FIG. 1D is a cross-sectional view of a heat and cold insulation bag according to a third embodiment of the present invention. [Figure 5B] FIG. 1C is a cross-sectional view of the heat and cold insulation bag of Example 3, corresponding to FIG. 1E. [Figure 6A] FIG. 1D is a cross-sectional view of a heat and cold insulation bag according to a fourth embodiment of the present invention. [Figure 6B] FIG. 1B is a cross-sectional view of the heat and cold insulation bag of Example 4, corresponding to FIG. 1E. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, several embodiments of the present invention will be described, including Examples 1 to 4 and their respective design variations. Note that the components of the examples and design variations described below can be combined with each other as long as they are not inconsistent. Also, note that the materials, shapes, dimensions, numbers, and arrangements of the components in each aspect of the examples and design variations described below are merely examples, and that any design variation is possible as long as the same functions can be achieved. [Example]

[0014] Hereinafter, a thermal insulation / cooler bag B1 according to multiple embodiments of the present invention, including a first embodiment and its design variations, will be described with reference to FIGS. 1A to 3E. FIGS. 1A to 3E show the thermal insulation / cooler bag B1 of the first embodiment. FIGS. 1A to 3B and 3D to 3E show the Z-Z' direction (first direction). The Z-Z' direction includes the Z direction (one of the first directions) and the Z' direction (the other of the first directions). FIGS. 1A, 1C, 1D, 2A, 2C, 2D, 3B, and 3D show the Y-Y' direction (second direction). The Y-Y' direction includes the Y direction (one of the second directions) and the Y' direction (the other of the second directions). FIGS. 1A, 1B, 1E, 2A, 2B, 2E, 3A, and 3E show the X-X' direction (third direction). The XX' direction includes the X direction (one of the third directions) and the X' direction (the other of the third directions).

[0015] The thermal insulation / cold insulation bag B1 has a substantially cylindrical main body B11 with a bottom that is open in the Z direction. The main body B11 has a bottom 100 and a side wall 200 (one side wall).

[0016] The bottom portion 100 is made of a flexible bottom sheet that is generally polygonal (generally rectangular in FIGS. 1A to 3E) or generally circular (not shown) when viewed from the Z' direction. This bottom sheet is made of a synthetic resin such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), or nylon.

[0017] The side wall 200 is generally tubular (generally polygonal tubular (generally rectangular tubular in FIGS. 1A to 3E) or generally cylindrical (not shown)) extending in the Z direction from the bottom 100. The side wall 200 may be connected to the peripheral edge of the bottom 100, or may be integrally connected to the peripheral edge of the bottom 100. The opening of the side wall 200 on the Z direction side is the opening of the main body B11.

[0018] The side wall 200 has a first wall portion 210 on the Y direction side. When the side wall 200 has a generally polygonal cylindrical shape, the first wall portion 210 is a portion forming one side of the side wall 200 on the Y direction side when viewed from the Z direction side (see FIGS. 1A to 3E) or a generally V-shaped portion (not shown) on the Y direction side of the side wall 200. When the side wall 200 has a generally cylindrical shape, the first wall portion 210 is a circular arc-shaped portion (not shown) on the Y direction side of the side wall 200 when viewed from the Z direction side.

[0019] The first wall portion 210 has a first first outer covering material 211 on the Y direction side (outside), a first second outer covering material 212 on the Y' direction side (inside), and a first core material 213. For ease of explanation, the first first outer covering material 211 will be referred to as the "first outer outer covering material 211" and the first second outer covering material 212 will be referred to as the "first inner outer covering material 212" below.

[0020] The first outer covering material 211 forms an outer covering on the Y-direction side (outside) of the first wall portion 210 and is made of a flexible sheet. This sheet is made of a synthetic resin such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), or nylon. The first inner covering material 212 forms an outer covering on the Y'-direction side (inside) of the first wall portion 210 and, like the first outer covering material 211, is made of the above-mentioned flexible sheet. The first outer covering material 211 and the first inner covering material 212 may be made of different materials or the same material. The upper end of the first outer covering material 211 on the Z-direction side and the upper end of the first inner covering material 212 on the Z-direction side are connected to each other. The lower end of the first outer covering material 211 on the Z'-direction side and the lower end of the first inner covering material 212 on the Z'-direction side are connected to each other and to a portion of the peripheral edge of the bottom portion 100 on the Y-direction side. Alternatively, either the lower end of the first outer outer covering material 211 on the Z'-direction side or the lower end of the first inner outer covering material 212 on the Z'-direction side is integrally connected to a portion of the peripheral edge of the bottom 100 on the Y-direction side, and the other is connected to the one.

[0021] The first outer covering material 211 has a first portion 211a and a second portion 211b. The first portion 211a is an arbitrary portion of the first outer covering material 211. The second portion 211b is a portion of the first outer covering material 211 separate from the first portion 211a. For example, the first portion 211a can be a portion on the Z-direction side of the first outer covering material 211 (see FIG. 2D) and the second portion 211b can be a portion on the Z'-direction side of the first portion 211a (see FIG. 2D), or vice versa.

[0022] The first inner outer covering material 212 has a first portion 212a and a second portion 212b. The first portion 212a is an arbitrary portion of the first inner outer covering material 212. The second portion 212b is a portion of the first inner outer covering material 212 separate from the first portion 212a. For example, the first portion 212a can be a portion on the Z-direction side of the first inner outer covering material 212 (see FIG. 2D) and the second portion 212b can be a portion on the Z'-direction side of the first portion 212a (see FIG. 2D), or vice versa.

[0023] As will be described later, the first core material 213 has a hardness sufficient to make the first outer covering material 211 flexible by directly or indirectly contacting the surface of the first outer covering material 211. The first core material 213 is made of, for example, a foam (e.g., a foam mainly made of ethylene vinyl acetate copolymer or urethane foam), molded resin, wood, metal, or the like.

[0024] The first core material 213 is disposed between the first outer covering material 211 and the first inner covering material 212. The first core material 213 may be disposed (1) between the first portion 211a of the first outer covering material 211 and the first portion 212a of the first inner covering material 212 (see FIGS. 1D and 2D), or (2) between the first portion 211a and the second portion 211b of the first outer covering material 211 and the first portion 212a and the second portion 212b of the first inner covering material 212 (not shown).

[0025] The first core material 213 has a first surface 213a on the first outer covering material 211 side (Y direction side) and a second surface 213b on the first inner covering material 212 side (Y' direction side). The first surface 213a of the first core material 213 is provided with a first engaging recess 213a1 and / or a first engaging protrusion 213a2.

[0026] The first engagement recess 213a1 is recessed in the Y' direction and is open at least in the Y direction. The first engagement recess 213a1 may be elongated and extend in the XX' direction and open in the X and X' directions, but is not limited to this.

[0027] The first engaging protrusion 213a2 is protruding in the Y direction. The first engaging protrusion 213a2 may be elongated and extend in the XX' direction.

[0028] When both the first engagement recess 213a1 and the first engagement protrusion 213a2 are provided, the first engagement protrusion 213a2 may be located on the Z direction side (see Figures 1D and 2D) or the Z' direction (not shown) relative to the first engagement recess 213a1, but may also be located on the X direction side or the X' direction side (not shown).

[0029] The first surface 213a of the first core material 213 is in surface contact with the first outer covering material 211 directly or indirectly via a first separate member. This allows the first outer covering material 211 to flex in accordance with the shape of the first engaging recess 213a1 and / or the first engaging protrusion 213a2 of the first core material 213.

[0030] When the first core material 213 has the above-described configuration (1), the first surface 213a of the first core material 213 is in surface contact with the first portion 211a of the first outer covering material 211 directly or indirectly via a first separate member (see FIGS. 1D and 2D). This allows the first portion 211a of the first outer covering material 211 to flex in accordance with the shape of the first engaging recess 213a1 and / or the first engaging protrusion 213a2 of the first core material 213.

[0031] When the first core material 213 has the above-described configuration (2), the first surface 213a of the first core material 213 is in surface contact with the first portion 211a and the second portion 211b of the first outer covering material 211 directly or indirectly via a first separate member (not shown). This allows the first portion 211a and / or the second portion 211b of the first outer covering material 211 to flex according to the shape of the first engaging recess 213a1 and / or the first engaging protrusion 213a2 of the first core material 213.

[0032] The first core material 213 may be fixed by being sewn or glued to at least one of the first outer covering material 211, the first inner covering material 212, and the first separate member (if provided).

[0033] When the first engagement protrusion 213a2 is located on the Z-direction side of the first engagement recess 213a1, or when the first engagement protrusion 213a2 is not provided but the first engagement recess 213a1 is provided, another protrusion 213a3 may be provided on the first surface 213a of the first core material 213 on the Z'-direction side of the first engagement recess 213a1. The protrusion 213a3 is protruding in the Y-direction. The protrusion 213a3 may also be elongated and extending in the X-X' direction. As described above, the first surface 213a of the first core material 213 comes into surface contact with the first portion 211a and the second portion 211b of the first outer covering material 211 directly or indirectly via a first separate member, thereby causing the first portion 211a and / or the second portion 211b of the first outer covering material 211 to flex according to the shape of the protrusion 213a3 of the first core material 213. The protrusion 213a3 can be omitted.

[0034] A convex portion 213b1 may be provided on the second surface 213b of the first core material 213. When the first surface 213a of the first core material 213 is provided with the first engagement recess 213a1, the convex portion 213b1 may be located on the Y'-direction side of the first engagement recess 213a1 and may be configured to be convex toward the Y'-direction side in accordance with the shape of the first engagement recess 213a1. When the first engagement recess 213a1 is elongated and extends in the X-X' direction, the convex portion 213b1 also is elongated and extends in the X-X' direction in accordance with the shape of the first engagement recess 213a1.

[0035] A recess 213b2 may be provided on the second surface 213b of the first core material 213. When the first surface 213a of the first core material 213 is provided with a first engagement protrusion 213a2, the recess 213b2 may be located on the Y' direction side of the first engagement protrusion 213a2 and may be configured to be recessed in the Y direction in accordance with the shape of the first engagement protrusion 213a2. When the first engagement protrusion 213a2 is elongated and extends in the X-X' direction, the recess 213b2 also is elongated and extends in the X-X' direction in accordance with the shape of the first engagement protrusion 213a2.

[0036] A recess 213b3 may be provided on the second surface 213b of the first core material 213. When a protrusion 213a3 is provided on the first surface 213a of the first core material 213, the recess 213b3 may be located on the Y' direction side of the protrusion 213a3 and may be recessed in the Y direction according to the shape of the protrusion 213a3. When the protrusion 213a3 is elongated and extends in the X-X' direction, the recess 213b3 also is elongated and extends in the X-X' direction according to the shape of the protrusion 213a3.

[0037] The second surface 213b of the first core material 213 may not be provided with the convex portions 213b1, the concave portions 213b2, and the concave portions 213b3, and may be a flat surface or an arc-shaped surface.

[0038] The first wall portion 210 may further have a first insulating layer 214. The first insulating layer 214 has at least one insulating sheet 2141 that is flexible. The at least one insulating sheet 2141 is made of polyurethane foam, polyethylene foam, polypropylene foam, nonwoven fabric, glass wool, rock wool, or the like. The at least one insulating sheet 2141 may be one (not shown) or multiple (see Figures 1D and 2D). When there are multiple at least one insulating sheets 2141, the multiple insulating sheets 2141 are arranged side by side in the Y-Y' direction. The multiple insulating sheets 2141 include at least one first insulating sheet 2141 and at least one second insulating sheet 2141.

[0039] The first insulating layer 214 may further include at least one flexible heat-shielding sheet (not shown). The at least one heat-shielding sheet is made of a sheet of aluminum or the like. The at least one heat-shielding sheet may be one (not shown) or multiple (see Figures 1D and 2D). One heat-shielding sheet is arranged on the Y-direction side or the Y'-direction side of one or more heat-shielding sheets 2141. The multiple heat-shielding sheets include a first heat-shielding sheet on the Y-direction side of one or more heat-shielding sheets 2141 and a second heat-shielding sheet on the Y'-direction side of one or more heat-shielding sheets 2141. The first and second heat-shielding sheets may be in the shape of a bag that contains one or more heat-shielding sheets 2141.

[0040] The first insulating layer 214 is arranged at least between the second portion 211b of the first outer covering material 211 and the second portion 212b of the first inner covering material 212. The first insulating layer 214 may have a first portion 214a and a second portion 214b. The first portion 214a of the first insulating layer 214 has a first portion of one or more insulating sheets 2141 (including a first portion of at least one first insulating sheet 2141 and a first portion of at least one second insulating sheet 2141), and the second portion 214b of the first insulating layer 214 has a second portion of one or more insulating sheets 2141 (including a second portion of at least one first insulating sheet 2141 and a second portion of at least one second insulating sheet 2141). When at least one heat shielding sheet is provided, the first portion 214a of the first insulating layer 214 further includes one or more first portions of the heat shielding sheet, and the second portion 214b of the first insulating layer 214 further includes one or more second portions of the heat shielding sheet.

[0041] When the first core material 213 has the above-mentioned configuration (1), the first heat insulating layer 214 may further have any one of the following configurations (1-1) to (1-3).

[0042] (1-1) The first part 214a of the first insulating layer 214 is arranged between the first core material 213 and the first part 212a of the first inner outer covering material 212, and the second part 214b of the first insulating layer 214 is arranged between the second part 211b of the first outer covering material 211 and the second part 212b of the first inner outer covering material 212 (see Figures 1D and 2D). In this case, the first part 214a of the first insulating layer 214 further has any one of the following configurations (1-1-1) to (1-1-10).

[0043] When the second surface 213b of the first core material 213 has recesses 213b2, protrusions 213b1, and recesses 213b3, (1-1-1) the first portion 214a of the first heat insulating layer 214 may be flexible according to the shapes of the recesses 213b2, protrusions 213b1, and recesses 213b3 of the first core material 213 (not shown), or (1-1-2) the first portion 214a of the first heat insulating layer 214 may be flexible according to the shape of the protrusions 213b1 of the first core material 213. However, it may be arranged with a gap between the bottom surface of the recess 213b2 and the bottom surface of the recess 213b3 (not shown), or (1-1-3) the first part 214a of the first insulating layer 214 may be arranged in a substantially flat state on the Y' direction side relative to the first core material 213, and a gap may be formed between the first part 214a of the first insulating layer 214 and a part of the second surface 213b of the first core material 213 other than the convex part 213b1 (not shown). In the above case (1-1-1), when the first insulating layer 214 has multiple insulating sheets 2141, the first portion of at least one first insulating sheet 2141 is flexible according to the shape of the recess 213b2, the protrusion 213b1 and the recess 213b3 of the first core material 213, but the first portion of at least one second insulating sheet 2141 is in an approximately flat state, and a gap may be formed between the flexible portion of the first portion of at least one first insulating sheet 2141 according to the shape of the recess 213b2 and / or the recess 213b3 and the first portion of at least one second insulating sheet 2141 (see Figures 1D and 2D).

[0044] If the second surface 213b of the first core material 213 has a convex portion 213b1 and a concave portion 213b2, but no concave portion 213b3, (1-1-4) the first insulating layer 214 may be flexible according to the shape of the convex portion 213b1 and the concave portion 213b2 of the first core material 213 (not shown), (1-1-5) the first insulating layer 214 may be flexible according to the shape of the convex portion 213b1 of the first core material 213, but may be arranged with a gap between it and the bottom surface of the concave portion 213b2 (not shown), or (1-1-6) the first insulating layer 214 may be arranged in a substantially flat state near the first core material 213, and a gap may be formed between the first insulating layer 214 and the bottom surface of the concave portion 213b2 (not shown). In the above case (1-1-4), when the first insulating layer 214 has multiple insulating sheets 2141, a first portion of at least one first insulating sheet 2141 is flexible according to the shape of the convex portion 213b1 and the concave portion 213b2 of the first core material 213, but a first portion of at least one second insulating sheet 2141 is substantially flat, and a gap may be formed between the flexible portion according to the shape of the concave portion 213b2 of the first portion of at least one first insulating sheet 2141 and the first portion of at least one second insulating sheet 2141 (not shown).

[0045] If a convex portion 213b1 is provided on the second surface 213b of the first core material 213 but a concave portion 213b2 and a concave portion 213b3 are not provided, (1-1-7) the first portion 214a of the first insulating layer 214 may be flexible according to the shape of the convex portion 213b1 of the first core material 213 (not shown), or (1-1-8) the first portion 214a of the first insulating layer 214 may be arranged in the vicinity of the first core material 213 in an approximately flat state and a gap may be formed between the first insulating layer 214 and a portion of the second surface 213b of the first core material 213 other than the convex portion 213b1 (not shown).

[0046] If a recess 213b2 is provided on the second surface 213b of the first core material 213, but the protrusion 213b1 and the recess 213b3 are not provided, (1-1-9) the first part 214a of the first insulating layer 214 may be flexible according to the shape of the recess 213b2 of the first core material 213 (not shown), or (1-1-10) the first part 214a of the first insulating layer 214 may be arranged in an approximately flat state with a gap between it and the recess 213b2 of the first core material 213 (not shown). In the above case (1-1-9), when the first insulating layer 214 has multiple insulating sheets 2141, a first portion of at least one first insulating sheet 2141 is flexible according to the shape of the recess 213b2 of the first core material 213, but a first portion of at least one second insulating sheet 2141 is in an approximately flat state, and a gap may be formed between the flexible portion according to the shape of the recess 213b2 of the first portion of at least one first insulating sheet 2141 and the first portion of at least one second insulating sheet 2141 (not shown).

[0047] (1-2) The first portion 214a of the first insulating layer 214 is arranged between the first core material 213 and the first portion 211a of the first outer covering material 211, and the second portion 214b of the first insulating layer 214 is arranged between the second portion 211b of the first outer covering material 211 and the second portion 212b of the first inner covering material 212 (not shown). In this case, the first portion 214a of the first insulating layer 214 further has any one of the following configurations (1-2-1) to (1-2-4).

[0048] When a first engaging recess 213a1, a first engaging protrusion 213a2, and a protrusion 213a3 are provided on the first surface 213a of the first core material 213, (1-2-1) the first portion 214a of the first insulating layer 214 flexes according to the shape of the first engaging recess 213a1, the first engaging protrusion 213a2, and the protrusion 213a3 of the first core material 213, and the first portion 211a of the first outer covering material 211 flexes according to the shape of the first portion 214a of the first insulating layer 214 (not shown).

[0049] When a first engaging recess 213a1 and a first engaging protrusion 213a2 are provided on the first surface 213a of the first core material 213, but no protrusion 213a3 is provided, (1-2-2) the first portion 214a of the first insulating layer 214 flexes according to the shape of the first engaging recess 213a1 and the first engaging protrusion 213a2 of the first core material 213, and the first portion 211a of the first outer covering material 211 flexes according to the shape of the first portion 214a of the first insulating layer 214 (not shown).

[0050] When a first engaging recess 213a1 is provided on the first surface 213a of the first core material 213, but the first engaging protrusion 213a2 and the protrusion 213a3 are not provided, (1-2-3) the first portion 214a of the first insulating layer 214 flexes according to the shape of the first engaging recess 213a1 of the first core material 213, and the first portion 211a of the first outer covering material 211 flexes according to the shape of the first portion 214a of the first insulating layer 214 (not shown).

[0051] When a first engaging protrusion 213a2 is provided on the first surface 213a of the first core material 213, but a first engaging recess 213a1 and a protrusion 213a3 are not provided, (1-2-4) the first portion 214a of the first insulating layer 214 flexes according to the shape of the first engaging protrusion 213a2 of the first core material 213, and the first portion 211a of the first outer covering material 211 flexes according to the shape of the first portion 214a of the first insulating layer 214 (not shown).

[0052] In any of the above cases (1-2-1) to (1-2-4), the first portion 214a of the first heat insulating layer 214 is the first separate member.

[0053] (1-3) The first part 214a of the first insulating layer 214 is not provided, and the second part 214b of the first insulating layer 214 is arranged between the second part 211b of the first outer covering material 211 and the second part 212b of the first inner covering material 212.

[0054] When the first core material 213 has the above-mentioned configuration (2), the first heat insulating layer 214 may further have any one of the following configurations (2-1) to (2-3).

[0055] (2-1) The first portion 214a of the first insulating layer 214 is arranged between the first core material 213 and the first portion 212a of the first inner outer covering material 212, and the second portion 214b of the first insulating layer 214 is arranged between the first core material 213 and the second portion 212b of the first inner outer covering material 212 (not shown). In this case, the first portion 214a of the first insulating layer 214 further has any one of the configurations (1-1-1) to (1-1-10) above.

[0056] (2-2) The first portion 214a of the first insulating layer 214 is arranged between the first core material 213 and the first portion 211a of the first outer covering material 211, and the second portion 214b of the first insulating layer 214 is arranged between the first core material 213 and the second portion 211b of the first outer covering material 211 (not shown). In this case, the first portion 214a of the first insulating layer 214 further has any one of the configurations (1-2-1) to (1-2-4) above.

[0057] (2-3) The first part 214a of the first insulating layer 214 is not provided, and the second part 214b of the first insulating layer 214 is arranged between the first core material 213 and the second part 211b of the first outer covering material 211 or between the first core material 213 and the second part 212b of the first inner covering material 212 (not shown).

[0058] The first heat insulating layer 214 can be omitted.

[0059] The first wall portion 210 may further have at least one first intermediate layer (not shown). The at least one first intermediate layer may be disposed between the first core material 213 and the first inner outer covering material 212, or between the first core material 213 and the first outer outer covering material 211, or between the first insulating layer 214 and the first core material 213 (only when the first insulating layer 214 is provided), or between the first insulating layer 214 and the first inner outer covering material 212 (only when the first insulating layer 214 is provided), or between the first insulating layer 214 and the first outer outer covering material 211 (only when the first insulating layer 214 is provided). Note that at least one first intermediate layer may be omitted.

[0060] Furthermore, when at least one first intermediate layer is arranged between the first outer covering material 211 and the first core material 213, the at least one first intermediate layer is the above-mentioned first separate member, and when at least one first intermediate layer and the first insulating layer 214 are arranged between the first outer covering material 211 and the first core material 213, the at least one first intermediate layer and the first insulating layer 214 are the above-mentioned first separate member.

[0061] The side wall 200 further has a second wall portion 220 on the Y'-direction side. When the side wall 200 has a generally polygonal cylindrical shape, the second wall portion 220 is a portion forming one side of the side wall 200 on the Y'-direction side when viewed from the Z-direction side (see FIGS. 1A to 3E) or a generally V-shaped portion (not shown) on the Y'-direction side of the side wall 200. When the side wall 200 has a generally cylindrical shape, the second wall portion 220 is an arc-shaped portion (not shown) on the Y'-direction side of the side wall 200 when viewed from the Z-direction side.

[0062] The second wall portion 220 has a second first outer covering material 221 on the Y' direction side (outside), a second second outer covering material 222 on the Y direction side (inside), and a second core material 223. Hereinafter, for ease of explanation, the second first outer covering material 221 will be referred to as the "second outer outer covering material 221," and the second second outer covering material 222 will be referred to as the "second inner outer covering material 222."

[0063] The second outer covering material 221 has the same configuration as the first outer covering material 211 of the first wall portion 210, except that it forms the covering on the Y'-direction side (outside) of the second wall portion 220. The second inner covering material 222 has the same configuration as the first inner covering material 212 of the first wall portion 210, except that it forms the covering on the Y'-direction side (inside) of the second wall portion 220.

[0064] As will be described later, the second core material 223 has a hardness sufficient to be able to flex the second outer covering material 221 by directly or indirectly coming into surface contact with the second outer covering material 221. The second core material 223 is made of the same material as the first core material 213.

[0065] The second core material 223 is disposed between the second outer covering material 221 and the second inner covering material 222. The second core material 223 may be (3) disposed between the first portion 221a of the second outer covering material 221 and the first portion 222a of the second inner covering material 222 (see Figures 1D and 2D), or (4) disposed between the first portion 221a and the second portion 221b of the second outer covering material 221 and the first portion 222a and the second portion 222b of the second inner covering material 222 (not shown).

[0066] The second core material 223 has a first surface 223a on the second outer covering material 221 side (Y' direction side) and a second surface 223b on the second inner covering material 222 side (Y direction side). A second engagement recess 223a1 and / or a second engagement protrusion 223a2 is provided on the first surface 223a of the second core material 223. The second engagement recess 223a1 has the same configuration as the first engagement recess 213a1 of the first core material 213, except that it is recessed in the Y direction. The second engagement protrusion 223a2 has the same configuration as the first engagement protrusion 213a2 of the first core material 213, except that it is protruded in the Y' direction.

[0067] The first surface 223a of the second core material 223 is in surface contact with the second outer covering material 221 directly or indirectly via a second separate member. This allows the second outer covering material 221 to flex in accordance with the shape of the second engaging recess 223a1 and / or the second engaging protrusion 223a2 of the second core material 223.

[0068] When the second core material 223 has the above-described configuration (3), the first surface 223a of the second core material 223 is in surface contact with the first portion 221a of the second outer covering material 221 directly or indirectly via a second separate member (see FIGS. 1D and 2D). This allows the first portion 221a of the second outer covering material 221 to flex in accordance with the shape of the second engaging recess 223a1 and / or the second engaging protrusion 223a2 of the second core material 223.

[0069] When the second core material 223 has the above-mentioned configuration (4), the first surface 223a of the second core material 223 is in surface contact with the first portion 221a and the second portion 221b of the second outer covering material 221 directly or indirectly via a second separate member (not shown). This allows the first portion 221a and / or the second portion 221b of the second outer covering material 221 to flex according to the shape of the second engaging recess 223a1 and / or the second engaging protrusion 223a2 of the second core material 223.

[0070] The second core material 223 may be fixed by being sewn or glued to at least one of the second outer covering material 221, the second inner covering material 222, and the second separate member (if provided).

[0071] When the second engagement protrusion 223a2 is located on the Z-direction side of the second engagement recess 223a1, or when the second engagement protrusion 223a2 is not provided but the second engagement recess 223a1 is provided, another protrusion 223a3 may be provided on the first surface 223a of the second core material 223 on the Z'-direction side of the second engagement recess 223a1. The protrusion 223a3 protrudes in the Y'-direction. The protrusion 223a3 may also be elongated and extend in the X-X' direction. As described above, the first surface 223a of the second core material 223 comes into surface contact with the first portion 221a and the second portion 221b of the second outer covering material 221 directly or indirectly via a second separate member, thereby causing the first portion 221a and / or the second portion 221b of the second outer covering material 221 to flex according to the shape of the protrusion 223a3 of the second core material 223. The protrusion 223a3 can be omitted.

[0072] A convex portion 223b1 may be provided on the second surface 223b of the second core material 223. When the second engagement recess 223a1 is provided on the first surface 223a of the second core material 223, the convex portion 223b1 may be located on the Y'-direction side of the second engagement recess 223a1 and may be configured to be convex toward the Y'-direction side in accordance with the shape of the second engagement recess 223a1. When the second engagement recess 223a1 is elongated and extends in the X-X' direction, the convex portion 223b1 also has an elongated shape and extends in the X-X' direction in accordance with the shape of the second engagement recess 223a1.

[0073] A recess 223b2 may be provided on the second surface 223b of the second core material 223. When the first surface 223a of the second core material 223 includes the second engagement protrusion 223a2, the recess 223b2 may be located on the Y'-direction side of the second engagement protrusion 223a2 and recessed in the Y-direction according to the shape of the second engagement protrusion 223a2. When the second engagement protrusion 223a2 is elongated and extends in the X-X' direction, the recess 223b2 is also elongated and extends in the X-X' direction according to the shape of the second engagement protrusion 223a2.

[0074] A recess 223b3 may be provided on the second surface 223b of the second core material 223. When a protrusion 223a3 is provided on the first surface 223a of the second core material 223, the recess 223b3 may be located on the Y'-direction side of the protrusion 223a3 and may be recessed in the Y-direction according to the shape of the protrusion 223a3. When the protrusion 223a3 is elongated and extends in the X-X' direction, the recess 223b3 is also elongated and extends in the X-X' direction according to the shape of the protrusion 223a3.

[0075] The second surface 223b of the second core 223 may not be provided with the convex portions 223b1, the concave portions 223b2, and the concave portions 223b3, and may be a flat surface or an arc-shaped surface.

[0076] The second wall portion 220 may further include a second insulating layer 224. The second insulating layer 224 has the same configuration as the first insulating layer 214, except that the second insulating layer 224 is disposed at least between the second portion 221b of the second outer covering material 221 and the second portion 222b of the second inner covering material 222.

[0077] When the second core material 223 has the above-mentioned configuration (3), the second heat insulating layer 224 may further have any one of the following configurations (3-1) to (3-3).

[0078] (3-1) The first part 224a of the second insulating layer 224 is arranged between the second core material 223 and the first part 222a of the second inner outer covering material 222, and the second part 224b of the second insulating layer 224 is arranged between the second part 221b of the second outer covering material 221 and the second part 222b of the second inner outer covering material 222 (see Figures 1D and 2D). In this case, the first part 224a of the second insulating layer 224 further has any one of the following configurations (3-1-1) to (3-1-10).

[0079] When the second surface 223b of the second core material 223 has the recesses 223b2, the protrusions 223b1, and the recesses 223b3, (3-1-1) the first portion 224a of the second heat insulating layer 224 may be flexible according to the shapes of the recesses 223b2, the protrusions 223b1, and the recesses 223b3 of the second core material 223 (not shown), or (3-1-2) the first portion 224a of the second heat insulating layer 224 may be flexible according to the shape of the protrusions 223b1 of the second core material 223. However, it may be arranged with a gap between the bottom surface of recess 223b2 and the bottom surface of recess 223b3 (not shown), or (3-1-3) the first part 224a of the second insulating layer 224 may be arranged in a substantially flat state on the Y direction side of the second core material 223 and a gap may be formed between the first part 224a of the second insulating layer 224 and a part of the second surface 223b of the second core material 223 other than the convex part 223b1 (not shown). In the above case (3-1-1), when the second insulating layer 224 has multiple insulating sheets 2241, the first portion of at least one first insulating sheet 2241 is flexible according to the shape of the recesses 223b2, protrusions 223b1 and recesses 223b3 of the second core material 223, but the first portion of at least one second insulating sheet 2241 is in an approximately flat state, and a gap may be formed between the flexible portion of the first portion of at least one first insulating sheet 2241 according to the shape of the recesses 223b2 and / or recesses 223b3 and the first portion of at least one second insulating sheet 2241 (see Figures 1D and 2D).

[0080] If the second surface 223b of the second core material 223 has a convex portion 223b1 and a concave portion 223b2, but no concave portion 223b3, (3-1-4) the second insulating layer 224 may be flexible according to the shape of the convex portion 223b1 and the concave portion 223b2 of the second core material 223 (not shown), (3-1-5) the second insulating layer 224 may be flexible according to the shape of the convex portion 223b1 of the second core material 223, but may be arranged with a gap between it and the bottom surface of the concave portion 223b2 (not shown), or (3-1-6) the second insulating layer 224 may be arranged in a substantially flat state near the second core material 223, and a gap may be formed between the second insulating layer 224 and the bottom surface of the concave portion 223b2 (not shown). In the above case (3-1-4), when the second insulating layer 224 has multiple insulating sheets 2241, the first portion of at least one first insulating sheet 2241 is flexible according to the shape of the convex portion 223b1 and the concave portion 223b2 of the second core material 223, but the first portion of at least one second insulating sheet 2241 is in an approximately flat state, and a gap may be formed between the flexible portion according to the shape of the concave portion 223b2 of the first portion of at least one first insulating sheet 2241 and the first portion of at least one second insulating sheet 2241 (not shown).

[0081] If a convex portion 223b1 is provided on the second surface 223b of the second core material 223 but no concave portion 223b2 or concave portion 223b3 is provided, (3-1-7) the first portion 224a of the second insulating layer 224 may be flexible according to the shape of the convex portion 223b1 of the second core material 223 (not shown), or (3-1-8) the first portion 224a of the second insulating layer 224 may be arranged in a substantially flat state near the second core material 223 and a gap may be formed between the second insulating layer 224 and a portion of the second surface 223b of the second core material 223 other than the convex portion 223b1 (not shown).

[0082] If a recess 223b2 is provided on the second surface 223b of the second core material 223, but the protrusion 223b1 and the recess 223b3 are not provided, (3-1-9) the first part 224a of the second insulating layer 224 may be flexible according to the shape of the recess 223b2 of the second core material 223 (not shown), or (3-1-10) the first part 224a of the second insulating layer 224 may be arranged in an approximately flat state with a gap between it and the recess 223b2 of the second core material 223 (not shown). In the above case (3-1-9), when the second insulating layer 224 has multiple insulating sheets 2241, a first portion of at least one first insulating sheet 2241 is flexible according to the shape of the recess 223b2 of the second core material 223, but a first portion of at least one second insulating sheet 2241 is in an approximately flat state, and a gap may be formed between the flexible portion according to the shape of the recess 223b2 of the first portion of at least one first insulating sheet 2241 and the first portion of at least one second insulating sheet 2241 (not shown).

[0083] (3-2) The first portion 224a of the second insulating layer 224 is arranged between the second core material 223 and the first portion 221a of the second outer covering material 221, and the second portion 224b of the second insulating layer 224 is arranged between the second portion 221b of the second outer covering material 221 and the second portion 222b of the second inner covering material 222 (not shown). In this case, the first portion 224a of the second insulating layer 224 further has any one of the following configurations (3-2-1) to (3-2-4).

[0084] When a second engaging recess 223a1, a second engaging protrusion 223a2, and a protrusion 223a3 are provided on the first surface 223a of the second core material 223, (3-2-1) the first part 224a of the second insulating layer 224 flexes according to the shape of the second engaging recess 223a1, the second engaging protrusion 223a2, and the protrusion 223a3 of the second core material 223, and the first part 221a of the second outer covering material 221 flexes according to the shape of the first part 224a of the second insulating layer 224 (not shown).

[0085] When a second engaging recess 223a1 and a second engaging protrusion 223a2 are provided on the first surface 223a of the second core material 223, but no protrusion 223a3 is provided, (3-2-2) the first portion 224a of the second insulating layer 224 flexes according to the shape of the second engaging recess 223a1 and the second engaging protrusion 223a2 of the second core material 223, and the first portion 221a of the second outer covering material 221 flexes according to the shape of the first portion 224a of the second insulating layer 224 (not shown).

[0086] When a second engaging recess 223a1 is provided on the first surface 223a of the second core material 223, but the second engaging protrusion 223a2 and the protrusion 223a3 are not provided, (3-2-3) the first part 224a of the second insulating layer 224 flexes according to the shape of the second engaging recess 223a1 of the second core material 223, and the first part 221a of the second outer covering material 221 flexes according to the shape of the first part 224a of the second insulating layer 224 (not shown).

[0087] When a second engaging protrusion 223a2 is provided on the first surface 223a of the second core material 223, but a second engaging recess 223a1 and a protrusion 223a3 are not provided, (3-2-4) the first portion 224a of the second insulating layer 224 flexes according to the shape of the second engaging protrusion 223a2 of the second core material 223, and the first portion 221a of the second outer covering material 221 flexes according to the shape of the first portion 224a of the second insulating layer 224 (not shown).

[0088] In any of the above cases (3-2-1) to (3-2-4), the first portion 224a of the second heat insulating layer 224 is the second separate member.

[0089] (3-3) The first part 224a of the second insulating layer 224 is not provided, and the second part 224b of the second insulating layer 224 is arranged between the second part 221b of the second outer covering material 221 and the second part 222b of the second inner outer covering material 222.

[0090] When the second core material 223 has the above-mentioned configuration (4), the second heat insulating layer 224 may further have any one of the following configurations (4-1) to (4-3).

[0091] (4-1) The first portion 224a of the second insulating layer 224 is arranged between the second core material 223 and the first portion 222a of the second inner outer covering material 222, and the second portion 224b of the second insulating layer 224 is arranged between the second core material 223 and the second portion 222b of the second inner outer covering material 222 (not shown). In this case, the first portion 224a of the second insulating layer 224 further has any one of the configurations (3-1-1) to (3-1-10) above.

[0092] (4-2) The first portion 224a of the second insulating layer 224 is arranged between the second core material 223 and the first portion 221a of the second outer covering material 221, and the second portion 224b of the second insulating layer 224 is arranged between the second core material 223 and the second portion 221b of the second outer covering material 221 (not shown). In this case, the first portion 224a of the second insulating layer 224 further has any one of the configurations (3-2-1) to (3-2-4) above.

[0093] (4-3) The first part 224a of the second insulating layer 224 is not provided, and the second part 224b of the second insulating layer 224 is arranged between the second core material 223 and the second part 221b of the second outer covering material 221 or between the second core material 223 and the second part 222b of the second inner covering material 222 (not shown).

[0094] The second heat insulating layer 224 can be omitted.

[0095] The second wall portion 220 may further include at least one second intermediate layer (not shown). The at least one second intermediate layer may be disposed between the second core material 223 and the second inner outer covering material 222, between the second core material 223 and the second outer covering material 221, between the second insulating layer 224 and the second core material 223 (only when the second insulating layer 224 is provided), between the second insulating layer 224 and the second inner outer covering material 222 (only when the second insulating layer 224 is provided), or between the second insulating layer 224 and the second outer outer covering material 221 (only when the second insulating layer 224 is provided). Note that at least one second intermediate layer may be omitted.

[0096] Furthermore, when at least one second intermediate layer is arranged between the second outer covering material 221 and the second core material 223, at least one second intermediate layer is the above-mentioned second separate member, and when at least one second intermediate layer and the second insulating layer 224 are arranged between the second outer covering material 221 and the second core material 223, at least one second intermediate layer and the second insulating layer 224 are the above-mentioned second separate member.

[0097] The side wall 200 further has a third wall portion 230 on the X-direction side. When the side wall 200 has a generally polygonal cylindrical shape, the third wall portion 230 is a portion forming one side of the side wall 200 on the X-direction side when viewed from the Z-direction side (see FIGS. 1A to 3E) or a generally V-shaped portion (not shown) on the X-direction side of the side wall 200. When the side wall 200 has a generally cylindrical shape, the third wall portion 230 is an arc-shaped portion (not shown) on the X-direction side of the side wall 200 when viewed from the Z-direction side.

[0098] The third wall portion 230 has a third first outer covering material 231 on the X-direction side (outside), a third second outer covering material 232 on the X'-direction side (inside), and a third core material 233. Hereinafter, for ease of explanation, the third first outer covering material 231 will be referred to as the "third outer outer covering material 231," and the third second outer covering material 232 will be referred to as the "third inner outer covering material 232."

[0099] The third outer covering material 231 has the same configuration as the first outer covering material 211 of the first wall portion 210, except that it forms the outer covering on the X-direction side (outside) of the third wall portion 230. The third inner covering material 232 has the same configuration as the first inner covering material 212 of the first wall portion 210, except that it forms the outer covering on the X'-direction side (inside) of the third wall portion 230.

[0100] As will be described later, the third core material 233 has a hardness sufficient to be able to flex the third outer covering material 231 by directly or indirectly coming into surface contact with the third outer covering material 231. The third core material 233 is made of the same material as the first core material 213.

[0101] The third core material 233 is disposed between the third outer covering material 231 and the third inner covering material 232. The third core material 233 may be disposed (5) between the first portion 231a of the third outer covering material 231 and the first portion 232a of the third inner covering material 232 (see Figures 1E and 2E), or (6) between the first portion 231a and the second portion 231b of the third outer covering material 231 and the first portion 232a and the second portion 232b of the third inner covering material 232 (not shown).

[0102] The third core material 233 has a first surface 233a on the third outer covering material 231 side (X-direction side) and a second surface 233b on the third inner covering material 232 side (X'-direction side). A third engagement recess 233a1 and / or a third engagement protrusion 233a2 is provided on the first surface 233a of the third core material 233. The third engagement recess 233a1 has the same configuration as the first engagement recess 213a1 of the first core material 213, except that it is recessed in the X'-direction. When the third engagement recess 233a1 is elongated, the third engagement recess 233a1 extends in the Y-Y' direction. The third engagement protrusion 233a2 has the same configuration as the first engagement protrusion 213a2 of the first core material 213, except that it is protruded in the X-direction. When the third engagement protrusion 233a2 is elongated, the third engagement protrusion 233a2 extends in the YY' direction.

[0103] The first surface 233a of the third core material 233 is in surface contact with the third outer covering material 231 directly or indirectly via a third separate member. This allows the third outer covering material 231 to flex in accordance with the shape of the third engaging recess 233a1 and / or the third engaging protrusion 233a2 of the third core material 233.

[0104] When the third core material 233 has the configuration (5) above, the first surface 233a of the third core material 233 is in surface contact with the first portion 231a of the third outer covering material 231 directly or indirectly via a third separate member (see FIGS. 1E and 2E). This allows the first portion 231a of the third outer covering material 231 to flex in accordance with the shape of the third engaging recess 233a1 and / or the third engaging protrusion 233a2 of the third core material 233.

[0105] When the third core material 233 has the above-described configuration (6), the first surface 233a of the third core material 233 is in surface contact with the first portion 231a and the second portion 231b of the third outer covering material 231 directly or indirectly via a third separate member (not shown). This allows the first portion 231a and / or the second portion 231b of the third outer covering material 231 to flex according to the shape of the third engaging recess 233a1 and / or the third engaging protrusion 233a2 of the third core material 233.

[0106] The third core material 233 may be fixed by being sewn or glued to at least one of the third outer covering material 231, the third inner covering material 232, and the third separate member (if provided).

[0107] When the third engagement protrusion 233a2 is located on the Z-direction side of the third engagement recess 233a1, or when the third engagement protrusion 233a2 is not provided but the third engagement recess 233a1 is provided, another protrusion 233a3 may be provided on the first surface 233a of the third core material 233 on the Z'-direction side of the third engagement recess 233a1. The protrusion 233a3 is protruding in the X-direction. The protrusion 233a3 may also be elongated and extend in the Y-Y' direction. As described above, the first surface 233a of the third core material 233 comes into surface contact with the first portion 231a and the second portion 231b of the third outer covering material 231 directly or indirectly via a third separate member, thereby causing the first portion 231a and / or the second portion 231b of the third outer covering material 231 to flex according to the shape of the protrusion 233a3 of the third core material 233. The protrusion 233a3 can be omitted.

[0108] A convex portion 233b1 may be provided on the second surface 233b of the third core material 233. When the third engagement recess 233a1 is provided on the first surface 233a of the third core material 233, the convex portion 233b1 may be located on the Y'-direction side of the third engagement recess 233a1 and may be configured to be convex toward the Y'-direction side in accordance with the shape of the third engagement recess 233a1. When the third engagement recess 233a1 is elongated and extends in the Y-Y' direction, the convex portion 233b1 also has an elongated shape and extends in the Y-Y' direction in accordance with the shape of the third engagement recess 233a1.

[0109] A recess 233b2 may be provided on the second surface 233b of the third core material 233. When the third engagement protrusion 233a2 is provided on the first surface 233a of the third core material 233, the recess 233b2 may be located on the Y' direction side of the third engagement protrusion 233a2 and may be configured to be recessed in the Y direction in accordance with the shape of the third engagement protrusion 233a2. When the third engagement protrusion 233a2 is elongated and extends in the Y-Y' direction, the recess 233b2 also has an elongated shape and extends in the Y-Y' direction in accordance with the shape of the third engagement protrusion 233a2.

[0110] A recess 233b3 may be provided on the second surface 233b of the third core material 233. When a protrusion 233a3 is provided on the first surface 233a of the third core material 233, the recess 233b3 may be located on the Y'-direction side of the protrusion 233a3 and may be recessed in the Y-direction according to the shape of the protrusion 233a3. When the protrusion 233a3 is elongated and extends in the Y-Y' direction, the recess 233b3 also is elongated and extends in the Y-Y' direction according to the shape of the protrusion 233a3.

[0111] The second surface 233b of the third core material 233 may not be provided with the convex portions 233b1, the concave portions 233b2, and the concave portions 233b3, and may be a flat surface or an arc-shaped surface.

[0112] The third wall portion 230 may further include a third insulating layer 234. The third insulating layer 234 has the same configuration as the first insulating layer 214, except that the third insulating layer 234 is disposed at least between the second portion 231b of the third outer covering material 231 and the second portion 232b of the third inner covering material 232.

[0113] When the third core material 233 has the above-mentioned configuration (5), the third heat insulating layer 234 may further have any one of the following configurations (5-1) to (5-3).

[0114] (5-1) The first part 234a of the third insulating layer 234 is arranged between the third core material 233 and the first part 232a of the third inner outer covering material 232, and the second part 234b of the third insulating layer 234 is arranged between the second part 231b of the third outer covering material 231 and the second part 232b of the third inner outer covering material 232 (see Figures 1E and 2E). In this case, the first part 234a of the third insulating layer 234 further has any one of the following configurations (5-1-1) to (5-1-10).

[0115] When the recesses 233b2, the protrusions 233b1, and the recesses 233b3 are provided on the second surface 233b of the third core material 233, (5-1-1) the first portion 234a of the third heat insulating layer 234 may be flexible according to the shapes of the recesses 233b2, the protrusions 233b1, and the recesses 233b3 of the third core material 233 (not shown), or (5-1-2) the first portion 234a of the third heat insulating layer 234 may be flexible according to the shape of the protrusions 233b1 of the third core material 233. However, it may be arranged with a gap between the bottom surface of the recess 233b2 and the bottom surface of the recess 233b3 (not shown), or (5-1-3) the first part 234a of the third insulating layer 234 may be arranged in a substantially flat state on the Y direction side of the third core material 233 and a gap may be formed between the first part 234a of the third insulating layer 234 and a part of the second surface 233b of the third core material 233 other than the convex part 233b1 (not shown). In the above case (5-1-1), when the third insulating layer 234 has multiple insulating sheets 2341, the first portion of at least one first insulating sheet 2341 is flexible according to the shape of the recess 233b2, the protrusion 233b1 and the recess 233b3 of the third core material 233, but the first portion of at least one second insulating sheet 2341 is in an approximately flat state, and a gap may be formed between the flexible portion of the first portion of at least one first insulating sheet 2341 according to the shape of the recess 233b2 and / or the recess 233b3 and the first portion of at least one second insulating sheet 2341 (see Figures 1D and 2D).

[0116] If the second surface 233b of the third core material 233 has a convex portion 233b1 and a concave portion 233b2, but no concave portion 233b3, (5-1-4) the third insulating layer 234 may be flexible according to the shape of the convex portion 233b1 and the concave portion 233b2 of the third core material 233 (not shown), (5-1-5) the third insulating layer 234 may be flexible according to the shape of the convex portion 233b1 of the third core material 233, but may be arranged with a gap between it and the bottom surface of the concave portion 233b2 (not shown), or (5-1-6) the third insulating layer 234 may be arranged in a substantially flat state near the third core material 233, and a gap may be formed between the third insulating layer 234 and the bottom surface of the concave portion 233b2 (not shown). In the above case (5-1-4), when the third insulating layer 234 has multiple insulating sheets 2341, the first portion of at least one first insulating sheet 2341 is flexible according to the shape of the convex portion 233b1 and the concave portion 233b2 of the third core material 233, but the first portion of at least one second insulating sheet 2341 is in an approximately flat state, and a gap may be formed between the flexible portion according to the shape of the concave portion 233b2 of the first portion of at least one first insulating sheet 2341 and the first portion of at least one second insulating sheet 2341 (not shown).

[0117] If a convex portion 233b1 is provided on the second surface 233b of the third core material 233 but no concave portion 233b2 or concave portion 233b3 is provided, (5-1-7) the first portion 234a of the third insulating layer 234 may be flexible according to the shape of the convex portion 233b1 of the third core material 233 (not shown), or (5-1-8) the first portion 234a of the third insulating layer 234 may be arranged in the vicinity of the third core material 233 in an approximately flat state and a gap may be formed between the third insulating layer 234 and a portion of the second surface 233b of the third core material 233 other than the convex portion 233b1 (not shown).

[0118] If a recess 233b2 is provided on the second surface 233b of the third core material 233, but the protrusion 233b1 and the recess 233b3 are not provided, (5-1-9) the first part 234a of the third insulating layer 234 may be flexible according to the shape of the recess 233b2 of the third core material 233 (not shown), or (5-1-10) the first part 234a of the third insulating layer 234 may be arranged in an approximately flat state with a gap between it and the recess 233b2 of the third core material 233 (not shown). In the above case (5-1-9), when the third insulating layer 234 has multiple insulating sheets 2341, a first portion of at least one first insulating sheet 2341 is flexible according to the shape of the recess 233b2 of the third core material 233, but a first portion of at least one second insulating sheet 2341 is in an approximately flat state, and a gap may be formed between the flexible portion according to the shape of the recess 233b2 of the first portion of at least one first insulating sheet 2341 and the first portion of at least one second insulating sheet 2341 (not shown).

[0119] (5-2) The first part 234a of the third insulating layer 234 is arranged between the third core material 233 and the first part 231a of the third outer covering material 231, and the second part 234b of the third insulating layer 234 is arranged between the second part 231b of the third outer covering material 231 and the second part 232b of the third inner covering material 232 (not shown). In this case, the first part 234a of the third insulating layer 234 further has any one of the following configurations (5-2-1) to (5-2-4).

[0120] When a third engaging recess 233a1, a third engaging protrusion 233a2 and a protrusion 233a3 are provided on the first surface 233a of the third core material 233, (5-2-1) the first part 234a of the third insulating layer 234 flexes according to the shape of the third engaging recess 233a1, the third engaging protrusion 233a2 and the protrusion 233a3 of the third core material 233, and the first part 231a of the third outer covering material 231 flexes according to the shape of the first part 234a of the third insulating layer 234 (not shown).

[0121] When a third engaging recess 233a1 and a third engaging protrusion 233a2 are provided on the first surface 233a of the third core material 233, but no protrusion 233a3 is provided, (5-2-2) the first part 234a of the third insulating layer 234 flexes according to the shape of the third engaging recess 233a1 and the third engaging protrusion 233a2 of the third core material 233, and the first part 231a of the third outer covering material 231 flexes according to the shape of the first part 234a of the third insulating layer 234 (not shown).

[0122] When a third engagement recess 233a1 is provided on the first surface 233a of the third core material 233, but the third engagement protrusion 233a2 and the protrusion 233a3 are not provided, (5-2-3) the first part 234a of the third insulation layer 234 flexes according to the shape of the third engagement recess 233a1 of the third core material 233, and the first part 231a of the third outer covering material 231 flexes according to the shape of the first part 234a of the third insulation layer 234 (not shown).

[0123] When a third engaging protrusion 233a2 is provided on the first surface 233a of the third core material 233, but a third engaging recess 233a1 and a protrusion 233a3 are not provided, (5-2-4) the first part 234a of the third insulating layer 234 flexes according to the shape of the third engaging protrusion 233a2 of the third core material 233, and the first part 231a of the third outer covering material 231 flexes according to the shape of the first part 234a of the third insulating layer 234 (not shown).

[0124] In any of the above cases (5-2-1) to (5-2-4), the first portion 234a of the third heat insulating layer 234 is the third separate member.

[0125] (5-3) The first part 234a of the third insulating layer 234 is not provided, and the second part 234b of the third insulating layer 234 is arranged between the second part 231b of the third outer covering material 231 and the second part 232b of the third inner covering material 232.

[0126] When the third core material 233 has the above-mentioned configuration (6), the third heat insulating layer 234 may further have any one of the following configurations (6-1) to (6-3).

[0127] (6-1) The first part 234a of the third insulating layer 234 is arranged between the third core material 233 and the first part 232a of the third inner outer covering material 232, and the second part 234b of the third insulating layer 234 is arranged between the third core material 233 and the second part 232b of the third inner outer covering material 232 (not shown). In this case, the first part 234a of the third insulating layer 234 further has any one of the configurations (5-1-1) to (5-1-10) above.

[0128] (6-2) The first portion 234a of the third insulating layer 234 is arranged between the third core material 233 and the first portion 231a of the third outer covering material 231, and the second portion 234b of the third insulating layer 234 is arranged between the third core material 233 and the second portion 231b of the third outer covering material 231 (not shown). In this case, the first portion 234a of the third insulating layer 234 further has any one of the configurations (5-2-1) to (5-2-4) above.

[0129] (6-3) The first part 234a of the third insulating layer 234 is not provided, and the second part 234b of the third insulating layer 234 is arranged between the third core material 233 and the second part 231b of the third outer covering material 231 or between the third core material 233 and the second part 232b of the third inner covering material 232 (not shown).

[0130] The third heat insulating layer 234 can be omitted.

[0131] The third wall portion 230 may further include at least one third intermediate layer (not shown). The at least one third intermediate layer may be disposed between the third core material 233 and the third inner outer covering material 232, between the third core material 233 and the third outer covering material 231, between the third insulating layer 234 and the third core material 233 (only when the third insulating layer 234 is provided), between the third insulating layer 234 and the third inner outer covering material 232 (only when the third insulating layer 234 is provided), or between the third insulating layer 234 and the third outer outer covering material 231 (only when the third insulating layer 234 is provided). Note that at least one third intermediate layer may be omitted.

[0132] Furthermore, when at least one third intermediate layer is arranged between the third outer covering material 231 and the third core material 233, at least one third intermediate layer is the above-mentioned third separate member, and when at least one third intermediate layer and the third insulating layer 234 are arranged between the third outer covering material 231 and the third core material 233, at least one third intermediate layer and the third insulating layer 234 are the above-mentioned third separate member.

[0133] The side wall 200 further has a fourth wall portion 240 on the X'-direction side. When the side wall 200 has a generally polygonal cylindrical shape, the fourth wall portion 240 is a portion forming one side of the side wall 200 on the X'-direction side when viewed from the Z-direction side (see FIGS. 1A to 3E) or a generally V-shaped portion (not shown) on the X'-direction side of the side wall 200. When the side wall 200 has a generally cylindrical shape, the fourth wall portion 240 is an arc-shaped portion (not shown) on the X'-direction side of the side wall 200 when viewed from the Z-direction side.

[0134] The fourth wall portion 240 has a fourth first outer covering material 241 on the X'-direction side (outside), a fourth second outer covering material 242 on the X-direction side (inside), and a fourth core material 243. For ease of explanation, the fourth first outer covering material 241 will be referred to as the "fourth outer outer covering material 241" and the fourth second outer covering material 242 will be referred to as the "fourth inner outer covering material 242" below.

[0135] The fourth outer covering material 241 has the same configuration as the first outer covering material 211 of the first wall portion 210, except that it forms the outer covering on the X'-direction side (outside) of the fourth wall portion 240. The fourth inner covering material 242 has the same configuration as the first inner covering material 212 of the first wall portion 210, except that it forms the outer covering on the X-direction side (inside) of the fourth wall portion 240.

[0136] As will be described later, the fourth core material 243 has a hardness sufficient to be able to flex the fourth outer covering material 241 by directly or indirectly coming into surface contact with the fourth outer covering material 241. The fourth core material 243 is made of the same material as the first core material 213.

[0137] The fourth core material 243 is disposed between the fourth outer covering material 241 and the fourth inner covering material 242. The fourth core material 243 may be disposed (7) between the first portion 241a of the fourth outer covering material 241 and the first portion 242a of the fourth inner covering material 242 (see Figures 1E and 2E), or (8) between the first portion 241a and the second portion 241b of the fourth outer covering material 241 and the first portion 242a and the second portion 242b of the fourth inner covering material 242 (not shown).

[0138] The fourth core material 243 has a first surface 243a on the fourth outer covering material 241 side (X' direction side) and a second surface 243b on the fourth inner covering material 242 side (X' direction side). A fourth engagement recess 243a1 and / or a fourth engagement protrusion 243a2 is provided on the first surface 243a of the fourth core material 243. The fourth engagement recess 243a1 has the same configuration as the first engagement recess 213a1 of the first core material 213, except that it is recessed in the X direction. When the fourth engagement recess 243a1 is elongated, the fourth engagement recess 243a1 extends in the Y-Y' direction. The fourth engagement protrusion 243a2 has the same configuration as the first engagement protrusion 213a2 of the first core material 213, except that it is protruded in the X' direction. When the fourth engagement protrusion 243a2 is elongated, the fourth engagement protrusion 243a2 extends in the YY' direction.

[0139] The first surface 243a of the fourth core material 243 is in surface contact with the fourth outer covering material 241 directly or indirectly via a fourth separate member. This allows the fourth outer covering material 241 to flex in accordance with the shape of the fourth engaging recess 243a1 and / or the fourth engaging protrusion 243a2 of the fourth core material 243.

[0140] When the fourth core material 243 has the above-described configuration (7), the first surface 243a of the fourth core material 243 is in surface contact with the first portion 241a of the fourth outer covering material 241 directly or indirectly via a fourth separate member (see FIGS. 1E and 2E). This allows the first portion 241a of the fourth outer covering material 241 to flex in accordance with the shape of the fourth engaging recess 243a1 and / or the fourth engaging protrusion 243a2 of the fourth core material 243.

[0141] When the fourth core material 243 has the above-described configuration (8), the first surface 243a of the fourth core material 243 is in surface contact with the first part 241a and the second part 241b of the fourth outer covering material 241 directly or indirectly via a fourth separate member (not shown). This allows the first part 241a and / or the second part 241b of the fourth outer covering material 241 to flex according to the shape of the fourth engaging recess 243a1 and / or the fourth engaging protrusion 243a2 of the fourth core material 243.

[0142] The fourth core material 243 may be fixed by being sewn or glued to at least one of the fourth outer covering material 241, the fourth inner covering material 242, and the fourth separate member (if provided).

[0143] When the fourth engagement protrusion 243a2 is located on the Z-direction side of the fourth engagement recess 243a1, or when the fourth engagement protrusion 243a2 is not provided but the fourth engagement recess 243a1 is provided, another protrusion 243a3 may be provided on the first surface 243a of the fourth core material 243 on the Z'-direction side of the fourth engagement recess 243a1. The protrusion 243a3 protrudes in the X'-direction. The protrusion 243a3 may also be elongated and extend in the Y-Y' direction. As described above, the first surface 243a of the fourth core material 243 comes into surface contact with the first portion 241a and the second portion 241b of the fourth outer covering material 241 directly or indirectly via a fourth separate member, thereby causing the first portion 241a and / or the second portion 241b of the fourth outer covering material 241 to flex according to the shape of the protrusion 243a3 of the fourth core material 243. The protrusion 243a3 can be omitted.

[0144] A convex portion 243b1 may be provided on the second surface 243b of the fourth core material 243. When the fourth engagement recess 243a1 is provided on the first surface 243a of the fourth core material 243, the convex portion 243b1 may be located on the Y'-direction side of the fourth engagement recess 243a1 and may be configured to be convex toward the Y'-direction side in accordance with the shape of the fourth engagement recess 243a1. When the fourth engagement recess 243a1 has an elongated shape extending in the Y-Y' direction, the convex portion 243b1 also has an elongated shape extending in the Y-Y' direction in accordance with the shape of the fourth engagement recess 243a1.

[0145] A recess 243b2 may be provided on the second surface 243b of the fourth core material 243. When the first surface 243a of the fourth core material 243 includes a fourth engagement protrusion 243a2, the recess 243b2 may be located on the Y'-direction side of the fourth engagement protrusion 243a2 and recessed in the Y-direction according to the shape of the fourth engagement protrusion 243a2. When the fourth engagement protrusion 243a2 has an elongated shape extending in the Y-Y' direction, the recess 243b2 also has an elongated shape extending in the Y-Y' direction according to the shape of the fourth engagement protrusion 243a2.

[0146] A recess 243b3 may be provided on the second surface 243b of the fourth core material 243. When a protrusion 243a3 is provided on the first surface 243a of the fourth core material 243, the recess 243b3 may be located on the Y'-direction side of the protrusion 243a3 and may be recessed in the Y-direction according to the shape of the protrusion 243a3. When the protrusion 243a3 is elongated and extends in the Y-Y' direction, the recess 243b3 also is elongated and extends in the Y-Y' direction according to the shape of the protrusion 243a3.

[0147] The second surface 243b of the fourth core material 243 may not be provided with the convex portions 243b1, the concave portions 243b2, and the concave portions 243b3, and may be a flat surface or an arc-shaped surface.

[0148] The fourth wall portion 240 may further include a fourth insulating layer 244. The fourth insulating layer 244 has the same configuration as the first insulating layer 214, except that the fourth insulating layer 244 is disposed at least between the second portion 241b of the fourth outer covering material 241 and the second portion 242b of the fourth inner covering material 242.

[0149] When the fourth core material 243 has the above-mentioned configuration (7), the fourth heat insulating layer 244 may further have any one of the following configurations (7-1) to (7-3).

[0150] (7-1) The first part 244a of the fourth insulating layer 244 is arranged between the fourth core material 243 and the first part 242a of the fourth inner outer covering material 242, and the second part 244b of the fourth insulating layer 244 is arranged between the second part 241b of the fourth outer outer covering material 241 and the second part 242b of the fourth inner outer covering material 242 (see Figures 1E and 2E). In this case, the first part 244a of the fourth insulating layer 244 further has any one of the following configurations (7-1-1) to (7-1-10).

[0151] When the second surface 243b of the fourth core material 243 has recesses 243b2, protrusions 243b1, and recesses 243b3, (7-1-1) the first portion 244a of the fourth insulating layer 244 may be flexible according to the shapes of the recesses 243b2, protrusions 243b1, and recesses 243b3 of the fourth core material 243 (not shown), or (7-1-2) the first portion 244a of the fourth insulating layer 244 may be flexible according to the shape of the protrusions 243b1 of the fourth core material 243. However, it may be arranged with a gap between the bottom surface of recess 243b2 and the bottom surface of recess 243b3 (not shown), or (7-1-3) the first part 244a of the fourth insulating layer 244 may be arranged in a substantially flat state on the Y direction side of the fourth core material 243 and a gap may be formed between the first part 244a of the fourth insulating layer 244 and a part other than the convex part 243b1 of the second surface 243b of the fourth core material 243 (not shown). In the above case (7-1-1), when the fourth insulating layer 244 has multiple insulating sheets 2441, the first portion of at least one first insulating sheet 2441 is flexible according to the shape of the recess 243b2, the protrusion 243b1 and the recess 243b3 of the fourth core material 243, but the first portion of at least one second insulating sheet 2441 is in an approximately flat state, and a gap may be formed between the flexible portion of the first portion of at least one first insulating sheet 2441 according to the shape of the recess 243b2 and / or the recess 243b3 and the first portion of at least one second insulating sheet 2441 (see Figures 1E and 2E).

[0152] If a convex portion 243b1 and a concave portion 243b2 are provided on the second surface 243b of the fourth core material 243, but a concave portion 243b3 is not provided, (7-1-4) the fourth insulating layer 244 may be flexible according to the shape of the convex portion 243b1 and the concave portion 243b2 of the fourth core material 243 (not shown), (7-1-5) the fourth insulating layer 244 may be flexible according to the shape of the convex portion 243b1 of the fourth core material 243, but may be arranged with a gap between it and the bottom surface of the concave portion 243b2 (not shown), or (7-1-6) the fourth insulating layer 244 may be arranged in a substantially flat state near the fourth core material 243, and a gap may be formed between the fourth insulating layer 244 and the bottom surface of the concave portion 243b2 (not shown). In the above case (7-1-4), when the fourth insulating layer 244 has multiple insulating sheets 2441, the first portion of at least one first insulating sheet 2441 is flexible according to the shape of the convex portion 243b1 and the concave portion 243b2 of the fourth core material 243, but the first portion of at least one second insulating sheet 2441 is in an approximately flat state, and a gap may be formed between the flexible portion according to the shape of the concave portion 243b2 of the first portion of at least one first insulating sheet 2441 and the first portion of at least one second insulating sheet 2441 (not shown).

[0153] If a convex portion 243b1 is provided on the second surface 243b of the fourth core material 243 but no concave portion 243b2 or concave portion 243b3 is provided, (7-1-7) the first portion 244a of the fourth insulating layer 244 may be flexible according to the shape of the convex portion 243b1 of the fourth core material 243 (not shown), or (7-1-8) the first portion 244a of the fourth insulating layer 244 may be arranged in a substantially flat state near the fourth core material 243 and a gap may be formed between the fourth insulating layer 244 and a portion of the second surface 243b of the fourth core material 243 other than the convex portion 243b1 (not shown).

[0154] If a recess 243b2 is provided on the second surface 243b of the fourth core material 243, but a protrusion 243b1 and a recess 243b3 are not provided, (7-1-9) the first part 244a of the fourth insulating layer 244 may be flexible according to the shape of the recess 243b2 of the fourth core material 243 (not shown), or (7-1-10) the first part 244a of the fourth insulating layer 244 may be arranged in an approximately flat state with a gap between it and the recess 243b2 of the fourth core material 243 (not shown). In the above case (7-1-9), when the fourth insulating layer 244 has multiple insulating sheets 2441, a first portion of at least one first insulating sheet 2441 is flexible according to the shape of the recess 243b2 of the fourth core material 243, but a first portion of at least one second insulating sheet 2441 is in an approximately flat state, and a gap may be formed between the flexible portion according to the shape of the recess 243b2 of the first portion of at least one first insulating sheet 2441 and the first portion of at least one second insulating sheet 2441 (not shown).

[0155] (7-2) The first part 244a of the fourth insulating layer 244 is arranged between the fourth core material 243 and the first part 241a of the fourth outer covering material 241, and the second part 244b of the fourth insulating layer 244 is arranged between the second part 241b of the fourth outer covering material 241 and the second part 242b of the fourth inner covering material 242 (not shown). In this case, the first part 244a of the fourth insulating layer 244 further has any one of the following configurations (7-2-1) to (7-2-4).

[0156] When a fourth engaging recess 243a1, a fourth engaging protrusion 243a2, and a protrusion 243a3 are provided on the first surface 243a of the fourth core material 243, (7-2-1) the first part 244a of the fourth insulating layer 244 flexes according to the shape of the fourth engaging recess 243a1, the fourth engaging protrusion 243a2, and the protrusion 243a3 of the fourth core material 243, and the first part 241a of the fourth outer covering material 241 flexes according to the shape of the first part 244a of the fourth insulating layer 244 (not shown).

[0157] When a fourth engaging recess 243a1 and a fourth engaging protrusion 243a2 are provided on the first surface 243a of the fourth core material 243, but no protrusion 243a3 is provided, (7-2-2) the first part 244a of the fourth insulating layer 244 flexes according to the shape of the fourth engaging recess 243a1 and the fourth engaging protrusion 243a2 of the fourth core material 243, and the first part 241a of the fourth outer covering material 241 flexes according to the shape of the first part 244a of the fourth insulating layer 244 (not shown).

[0158] When a fourth engagement recess 243a1 is provided on the first surface 243a of the fourth core material 243, but the fourth engagement protrusion 243a2 and the protrusion 243a3 are not provided, (7-2-3) the first part 244a of the fourth insulation layer 244 flexes according to the shape of the fourth engagement recess 243a1 of the fourth core material 243, and the first part 241a of the fourth outer covering material 241 flexes according to the shape of the first part 244a of the fourth insulation layer 244 (not shown).

[0159] When a fourth engaging protrusion 243a2 is provided on the first surface 243a of the fourth core material 243, but a fourth engaging recess 243a1 and a protrusion 243a3 are not provided, (7-2-4) the first part 244a of the fourth insulating layer 244 flexes according to the shape of the fourth engaging protrusion 243a2 of the fourth core material 243, and the first part 241a of the fourth outer covering material 241 flexes according to the shape of the first part 244a of the fourth insulating layer 244 (not shown).

[0160] In any of the above cases (7-2-1) to (7-2-4), the first portion 244a of the fourth heat insulating layer 244 is the fourth separate member.

[0161] (7-3) The first part 244a of the fourth insulating layer 244 is not provided, and the second part 244b of the fourth insulating layer 244 is arranged between the second part 241b of the fourth outer covering material 241 and the second part 242b of the fourth inner covering material 242.

[0162] When the fourth core material 243 has the above-mentioned configuration (8), the fourth heat insulating layer 244 may further have any one of the following configurations (8-1) to (8-3).

[0163] (8-1) The first part 244a of the fourth insulating layer 244 is arranged between the fourth core material 243 and the first part 242a of the fourth inner outer covering material 242, and the second part 244b of the fourth insulating layer 244 is arranged between the fourth core material 243 and the second part 242b of the fourth inner outer covering material 242 (not shown). In this case, the first part 244a of the fourth insulating layer 244 further has any one of the configurations (7-1-1) to (7-1-10) above.

[0164] (8-2) The first part 244a of the fourth insulating layer 244 is arranged between the fourth core material 243 and the first part 241a of the fourth outer covering material 241, and the second part 244b of the fourth insulating layer 244 is arranged between the fourth core material 243 and the second part 241b of the fourth outer covering material 241 (not shown). In this case, the first part 244a of the fourth insulating layer 244 further has any one of the configurations (7-2-1) to (7-2-4) above.

[0165] (8-3) The first part 244a of the fourth insulating layer 244 is not provided, and the second part 244b of the fourth insulating layer 244 is arranged between the fourth core material 243 and the second part 241b of the fourth outer outer covering material 241 or between the fourth core material 243 and the second part 242b of the fourth inner outer covering material 242 (not shown).

[0166] The fourth heat insulating layer 244 can be omitted.

[0167] The fourth wall portion 240 may further include at least one fourth intermediate layer (not shown). The at least one fourth intermediate layer may be disposed between the fourth core material 243 and the fourth inner outer covering material 242, between the fourth core material 243 and the fourth outer outer covering material 241, between the fourth insulating layer 244 and the fourth core material 243 (only when the fourth insulating layer 244 is provided), between the fourth insulating layer 244 and the fourth inner outer covering material 242 (only when the fourth insulating layer 244 is provided), or between the fourth insulating layer 244 and the fourth outer outer covering material 241 (only when the fourth insulating layer 244 is provided). Note that at least one fourth intermediate layer may be omitted.

[0168] Furthermore, when at least one fourth intermediate layer is arranged between the fourth outer covering material 241 and the fourth core material 243, at least one fourth intermediate layer is the above-mentioned fourth separate member, and when at least one fourth intermediate layer and the fourth insulating layer 244 are arranged between the fourth outer covering material 241 and the fourth core material 243, at least one fourth intermediate layer and the fourth insulating layer 244 are the above-mentioned fourth separate member.

[0169] The first outer covering material 211, the third outer covering material 231, the second outer covering material 221, and the fourth outer covering material 241 may be integrally connected to form a generally cylindrical shape. The X-direction end of adjacent first outer covering materials 211 and the Y-direction end of the third outer covering material 231 are integrally connected, the X'-direction end of adjacent first outer covering materials 211 and the Y-direction end of the fourth outer covering material 241 are integrally connected, the X-direction end of adjacent second outer covering materials 221 and the Y'-direction end of the third outer covering material 231 are integrally connected, and the X'-direction end of adjacent second outer covering materials 221 and the Y'-direction end of the fourth outer covering material 241 are integrally connected.

[0170] Alternatively, the first outer covering material 211, the third outer covering material 231, the second outer covering material 221, and the fourth outer covering material 241 may be separate bodies. The X-direction ends of adjacent first outer covering materials 211 are connected to the Y-direction ends of the third outer covering material 231, the X'-direction ends of adjacent first outer covering materials 211 are connected to the Y-direction ends of the fourth outer covering material 241, the X-direction ends of adjacent second outer covering materials 221 are connected to the Y'-direction ends of the third outer covering material 231, and the X'-direction ends of adjacent second outer covering materials 221 are connected to the Y'-direction ends of the fourth outer covering material 241. The first outer covering material 211, the third outer covering material 231, the second outer covering material 221 and the fourth outer covering material 241 connected in this manner form a substantially cylindrical shape.

[0171] The first inner outer covering material 212, the third inner outer covering material 232, the second inner outer covering material 222, and the fourth inner outer covering material 242 may be integrally connected to form a generally cylindrical shape. The X-direction end of adjacent first inner outer covering materials 212 and the Y-direction end of the third inner outer covering material 232 are integrally connected, the X'-direction end of adjacent first inner outer covering materials 212 and the Y-direction end of the fourth inner outer covering material 242 are integrally connected, the X-direction end of adjacent second inner outer covering materials 222 and the Y'-direction end of the third inner outer covering material 232 are integrally connected, and the X'-direction end of adjacent second inner outer covering materials 222 and the Y'-direction end of the fourth inner outer covering material 242 are integrally connected.

[0172] Alternatively, the first inner outer covering material 212, the third inner outer covering material 232, the second inner outer covering material 222, and the fourth inner outer covering material 242 may be separate bodies. The X-direction ends of adjacent first inner outer covering materials 212 are connected to the Y-direction ends of the third inner outer covering material 232, the X'-direction ends of adjacent first inner outer covering materials 212 are connected to the Y-direction ends of the fourth inner outer covering material 242, the X-direction ends of adjacent second inner outer covering materials 222 are connected to the Y'-direction ends of the third inner outer covering material 232, and the X'-direction ends of adjacent second inner outer covering materials 222 are connected to the Y'-direction ends of the fourth inner outer covering material 242. The first inner outer covering material 212, the third inner outer covering material 232, the second inner outer covering material 222 and the fourth inner outer covering material 242 connected in this manner form a substantially cylindrical shape.

[0173] The first core material 213, the third core material 233, the second core material 223, and the fourth core material 243 may be integrally connected to form a generally cylindrical shape. The X-direction end of adjacent first core material 213 and the Y-direction end of adjacent third core material 233 are integrally connected, the X'-direction end of adjacent first core material 213 and the Y-direction end of adjacent fourth core material 243 are integrally connected, the X-direction end of adjacent second core material 223 and the Y'-direction end of adjacent third core material 233 are integrally connected, and the X'-direction end of adjacent second core material 223 and the Y'-direction end of adjacent fourth core material 243 are integrally connected. Alternatively, the first core material 213, the third core material 233, the second core material 223, and the fourth core material 243 may be separate bodies.

[0174] The first engagement recess 213a1 of the first core material 213, the third engagement recess 233a1 of the third core material 233, the second engagement recess 223a1 of the second core material 223, and the fourth engagement recess 243a1 of the fourth core material 243 may be connected to form a single, generally annular recess, or may be separated from one another. Similarly, the first engagement protrusion 213a2 of the first core material 213, the third engagement protrusion 233a2 of the third core material 233, the second engagement protrusion 223a2 of the second core material 223, and the fourth engagement protrusion 243a2 of the fourth core material 243 may be connected to form a single, generally annular protrusion, or may be separated from one another. Similarly, the convex portion 213a3 of the first core material 213, the convex portion 233a3 of the third core material 233, the convex portion 223a3 of the second core material 223, and the convex portion 243a3 of the fourth core material 243 may be continuous to form a single, approximately annular convex portion, or may be separated from each other.

[0175] Furthermore, the convex portion 213b1 of the first core material 213, the convex portion 233b1 of the third core material 233, the convex portion 223b1 of the second core material 223, and the convex portion 243b1 of the fourth core material 243 may be connected to form a substantially annular convex portion, or may be separated from one another. Similarly, the concave portion 213b2 of the first core material 213, the concave portion 233b2 of the third core material 233, the concave portion 223b2 of the second core material 223, and the concave portion 243b2 of the fourth core material 243 may be connected to form a single substantially annular concave portion, or may be separated from one another. Similarly, the concave portion 213b3 of the first core material 213, the concave portion 233b3 of the third core material 233, the concave portion 223b3 of the second core material 223, and the concave portion 243b3 of the fourth core material 243 may be connected to form a single substantially annular concave portion, or may be separated from one another.

[0176] The first insulating layer 214, the third insulating layer 234, the second insulating layer 224, and the fourth insulating layer 244 may be integrally connected to form a generally cylindrical shape. The X-direction end of adjacent first insulating layers 214 and the Y-direction end of the third insulating layer 234 are integrally connected, the X'-direction end of adjacent first insulating layers 214 and the Y-direction end of the fourth insulating layer are integrally connected, the X-direction end of adjacent second insulating layers 224 and the Y'-direction end of the third insulating layer 234 are integrally connected, and the X'-direction end of adjacent second insulating layers 224 and the Y'-direction end of the fourth insulating layer are integrally connected. Alternatively, the first insulating layer 214, the third insulating layer 234, the second insulating layer 224, and the fourth insulating layer 244 may be separate bodies.

[0177] The above-mentioned first wall portion 210, second wall portion 220, third wall portion 230 and fourth wall portion 240 can each be configured to have a first portion on the Z-direction side and a second portion on the Z'-direction side.

[0178] When the first core material 213 has the configuration (1-1) or (1-2) above, the second core material 223 has the configuration (3-1) or (3-2) above, the third core material 233 has the configuration (5-1) or (5-2) above, and the fourth core material 243 has the configuration (7-1) or (7-2) above, the first and second parts of the first wall portion 210, the second wall portion 220, the third wall portion 230, and the fourth wall portion 240 can have the following configurations.

[0179] The first part of the first wall portion 210 has a first part 211a which is the Z-direction side part of the first outer covering material 211, a first part 212a which is the Z-direction side part of the first inner covering material 212, a first core material 213, and a first part 214a of the first insulating layer 214, and the first part of the second wall portion 220 has a first part 221a which is the Z-direction side part of the second outer covering material 221, a first part 222a which is the Z-direction side part of the second inner covering material 222, a second core material 223, and a first part 224a of the second insulating layer 224, and The first part of the third wall portion 230 has a first part 231a which is the Z-direction side part of the third outer outer covering material 231, a first part 232a which is the Z-direction side part of the third inner outer covering material 232, a third core material 233, and a first part 234a of the third insulating layer 234, and the first part of the fourth wall portion 240 has a first part 241a which is the Z-direction side part of the fourth outer outer covering material 241, a first part 242a which is the Z-direction side part of the fourth inner outer covering material 242, a fourth core material 243, and a first part 244a of the fourth insulating layer 244.

[0180] The second part of the first wall portion 210 has a second part 211b which is the Z'-direction side part of the first outer covering material 211, a second part 212b which is the Z'-direction side part of the first inner covering material 212, and a second part 214b of the first insulating layer 214, and the second part of the second wall portion 220 has a second part 221b which is the Z'-direction side part of the second outer covering material 221, a second part 222b which is the Z'-direction side part of the second inner covering material 222, and a second part 224b of the second insulating layer 224, and the second part of the third wall portion 230 has The fourth wall portion 240 has a second portion 231b which is the Z'-direction portion of the third outer outer covering material 231, a second portion 232b of the third inner outer covering material 232 which is the Z'-direction portion of the third inner outer covering material 232, and a second portion 234b of the third insulating layer 234, and the second portion of the fourth wall portion 240 has a second portion 241b of the fourth outer outer covering material 241 which is the Z'-direction portion of the fourth outer outer covering material 241, a second portion 242b which is the Z'-direction portion of the fourth inner outer covering material 242, and a second portion 244b of the fourth insulating layer 244.

[0181] When the first core material 213 has the configuration (1-3) above, the second core material 223 has the configuration (3-3) above, the third core material 233 has the configuration (5-3) above and the fourth core material 243 has the configuration (7-3) above, the first part of the first wall portion 210, the first part of the second wall portion 220, the first part of the third wall portion 230 and the first part of the fourth wall portion 240 can be configured in such a way that the first part 214a of the first insulating layer 214, the first part 234a of the third insulating layer 234, the first part 234a of the third insulating layer 234 and the first part 244a of the fourth insulating layer 244 are omitted, and the second part of the first wall portion 210, the second part of the second wall portion 220, the second part of the third wall portion 230 and the second part of the fourth wall portion 240 can be configured as described above.

[0182] Since the second part of the first wall portion 210, the second part of the second wall portion 220, the second part of the third wall portion 230, and the second part of the fourth wall portion 240 do not have the first core material 213, the second core material 223, the third core material 233, and the fourth core material 243 built in, it is possible to configure the second part of the first wall portion 210 to be valley foldable in the Y' direction by the first valley fold, the second part of the second wall portion 220 to be valley foldable in the Y direction by the second valley fold line, the second part of the third wall portion 230 to be valley foldable in the X' direction by the third valley fold line, and the second part of the fourth wall portion 240 to be valley foldable in the X direction by the fourth valley fold line. The first and second valley fold lines are provided in the second part of the first wall portion 210 and the second part of the second wall portion 220 and extend in the X-X' direction. The third and fourth valley fold lines are provided in the second part of the third wall portion 230 and the second part of the fourth wall portion 240 and extend in the Y-Y' direction.

[0183] The second part of the first wall portion 210, the second part of the second wall portion 220, the second part of the third wall portion 230 and the second part of the fourth wall portion 240 may be configured to be mountain foldable or may not be configured to be foldable.

[0184] The main body B11 may further include a first engagement portion 250 and / or a second engagement portion 250. The first engagement portion 250 is fixed onto the first outer covering material 211 of the first wall portion 210 and is supported by the first core material 213. The second engagement portion 250 is fixed onto the second outer covering material 221 of the second wall portion 220 and is supported by the second core material 223. Note that the first engagement portion 250 and the second engagement portion 250 may be omitted.

[0185] The thermal insulation / cold storage bag B1 may further include a liner B13 having a substantially cylindrical shape with a bottom that is open in the Z direction. The liner B13 is stored in the main body B11. Hereinafter, this state will be referred to as the "stored state." The liner B13 has a bottom sheet B13a and a peripheral wall sheet. The bottom sheet B13a and the peripheral wall sheet are each made of the same material as the first outer covering material 211 of the first wall portion 210. In the stored state, the bottom sheet B13a is placed on the bottom portion 100 of the main body B11. The peripheral wall sheet has a substantially cylindrical shape that corresponds to the inner shape of the side wall 200 of the main body B11 and extends in the Z direction from the bottom sheet B13a. The peripheral wall sheet has a first wall sheet B13b1 on the Y-direction side, a second wall sheet B13b2 on the Y'-direction side, a third wall sheet B13b3 on the X-direction side, and a fourth wall sheet B13b4 on the X'-direction side. In the stored state, the first wall sheet B13b1, the second wall sheet B13b2, the third wall sheet B13b3, and the fourth wall sheet B13b4 are arranged along the first inner outer covering material 212 of the first wall portion 210, the second inner outer covering material 222 of the second wall portion 220, the third inner outer covering material 232 of the third wall portion 230, and the fourth inner outer covering material 242 of the fourth wall portion 240. In the stored state, the first wall sheet B13b1, the second wall sheet B13b2, the third wall sheet B13b3, and the fourth wall sheet B13b4 may be fixed to the first inner outer covering material 212 of the first wall portion 210, the second inner outer covering material 222 of the second wall portion 220, the third inner outer covering material 232 of the third wall portion 230, and the fourth inner outer covering material 242 of the fourth wall portion 240 with hook-and-loop fasteners or the like, but this is not limited to this. The liner B13 can be omitted.

[0186] The hot / cold bag B1 may further include an auxiliary insulating part B14. When a liner B13 is provided, the auxiliary insulating part B14 is insertable into and detachable from the liner B13 in the Z-Z' direction and is disposed on the bottom sheet B13a of the liner B13. When a liner B13 is not provided, the auxiliary insulating part B14 is insertable into and detachable from the main body B11 in the Z-Z' direction and is disposed on the bottom 100 of the main body B11. The auxiliary insulating part B14 includes at least one insulating sheet and a pair of heat-shielding sheets. The at least one insulating sheet has a structure similar to that of the at least one insulating sheet 341 of the ceiling part 300 of the lid B12. The peripheral portions of the pair of heat-shielding sheets are closed together to form a bag-like shape that accommodates the at least one insulating sheet. The auxiliary insulating part B14 may be omitted.

[0187] The thermal insulation / cold storage bag B1 further includes a lid B12 that closes the opening of the main body B11 from the Z direction side. The lid B12 is detachable from the main body B11 in the Z-Z' direction (see FIGS. 1A to 3E). For ease of explanation, the state in which the lid B12 closes the opening of the main body B11 will be referred to as the "closed state," and the state in which the lid B12 opens the opening of the main body B11 will be referred to as the "open state." The lid B12 has a ceiling portion 300 and a side wall 400 (the other side wall).

[0188] The ceiling portion 300 has an outer covering material 310 on the Z-direction side and an outer covering material 320 on the Z'-direction side. The outer covering material 310 forms the outer covering on the Z-direction side of the ceiling portion 300 and is made of the same material as the first outer covering material 211 of the first wall portion 210 of the main body B11. The outer covering material 320 forms the outer covering on the Z'-direction side of the ceiling portion 300 and is made of the same material as the first outer covering material 211 of the first wall portion 210.

[0189] The ceiling section 300 further includes a core material 330 and / or a thermal insulation layer 340. The core material 330 is made of the same material as the first core material 213 of the first wall section 210 and is disposed between the outer covering material 310 and the outer covering material 320. The thermal insulation layer 340 is disposed between the outer covering material 310 and the outer covering material 320. The thermal insulation layer 340 includes at least one thermal insulation sheet 341. The at least one thermal insulation sheet 341 is made of polyurethane foam, polyethylene foam, polypropylene foam, nonwoven fabric, glass wool, rock wool, or the like. The thermal insulation layer 340 may further include at least one heat-shielding sheet. When there are multiple at least one thermal insulation sheets 341, the at least one thermal insulation sheet 341 is stacked in the Z-Z' direction. The at least one thermal insulation sheet is made of a sheet of aluminum or the like. The at least one thermal insulation sheet may be one (not shown) or multiple (see Figures 1D and 1E). One heat-shielding sheet is arranged on the Z-direction side or Z'-direction side of one or more heat-insulating sheets 341. The multiple heat-shielding sheets include a first heat-shielding sheet on the Z-direction side of one or more heat-insulating sheets 341 and a second heat-shielding sheet on the Z'-direction side of one or more heat-insulating sheets 341. The first and second heat-shielding sheets may be in the shape of a bag that accommodates one or more heat-insulating sheets 341. When both the core material 330 and the heat-insulating layer 340 are provided, it is preferable that the heat-insulating layer 340 be arranged in the Z'-direction relative to the core material 330, but the reverse is also possible. Note that the core material 330 and / or the heat-insulating layer 340 may be omitted.

[0190] The ceiling portion 300 may further include a reinforcing plate 350. The reinforcing plate 350 is made of the same material as the first core material 213 of the first wall portion 210 or a material harder than the first core material 213. When both the core material 330 and the insulating layer 340 are provided, the core material 330, the insulating layer 340, and the reinforcing plate 350 may be arranged in this order in the Z-Z' direction between the outer covering material 310 and the outer covering material 320, but the arrangement order can be set arbitrarily. The reinforcing plate 350 may be omitted.

[0191] In the closed state, the ceiling portion 300 abuts against the side wall 200 of the main body B11 from the Z direction side.

[0192] The side wall 400 is approximately cylindrical (approximately polygonal cylindrical (approximately square cylindrical in Figures 1A to 3E) or approximately cylindrical (not shown)) extending in the Z' direction from the ceiling portion 300, and in the closed state is arranged around the side wall 200 of the main body B11.

[0193] The side wall 400 has a fifth wall portion 410 on the Y-direction side. When the side wall 400 has a generally polygonal cylindrical shape, the fifth wall portion 410 is a portion forming one side of the side wall 400 on the Y-direction side when viewed from the Z-direction side (see FIGS. 1A to 3E) or a generally V-shaped portion (not shown) on the Y-direction side of the side wall 400. When the side wall 400 has a generally cylindrical shape, the fifth wall portion 410 is a circular arc-shaped portion (not shown) on the Y-direction side of the side wall 400 when viewed from the Z-direction side. In the closed state, the fifth wall portion 410 and the first wall portion 210 face each other in the Y-Y' direction.

[0194] The fifth wall portion 410 has a fifth outer covering material 411 on the Y-direction side (outside) and a fifth inner covering material 412 on the Y'-direction side (inside). The fifth outer covering material 411 forms the covering on the Y-direction side of the fifth wall portion 410 and is made of the same material as the first outer covering material 211 of the first wall portion 210. The Z-direction end of the fifth outer covering material 411 may be integrally connected to the Y-direction end of the covering material 310 of the ceiling portion 300 (not shown), or the two may be separate bodies, with the Z-direction end of the fifth outer covering material 411 connected to the Y-direction end of the covering material 310 of the ceiling portion 300 (see FIGS. 1D and 3D). The fifth inner covering material 412 forms the covering on the Y'-direction side of the fifth wall portion 410 and is made of the same material as the first outer covering material 211 of the first wall portion 210. The Z-direction side portion of the fifth inner outer covering material 412 may be integrally connected to the Y-direction side end of the outer covering material 320 of the ceiling portion 300 (not shown), or the two may be separate bodies, with the Z-direction side portion of the fifth inner outer covering material 412 connected to the Y-direction side end of the outer covering material 320 of the ceiling portion 300 (see Figures 1D and 3D). In the closed state, the fifth inner outer covering material 412 and the first outer outer covering material 211 face each other.

[0195] The fifth wall portion 410 further includes a fifth core material 413 (see FIGS. 1D and 3D ) and / or a fifth insulating layer (not shown). The fifth core material 413 is made of the same material as the first core material 213 of the first wall portion 210 and is disposed between the fifth outer covering material 411 and the fifth inner covering material 412. The Z-direction end of the fifth core material 413 may be integrally connected to the Y-direction end of the core material 330 of the ceiling portion 300, or the two may be separate bodies. The fifth insulating layer, like the first insulating layer 214 of the first wall portion 210, may include at least one insulating sheet as described above and may further include at least one heat-shielding sheet as described above. The Z-direction end of the fifth insulating layer may be integrally connected to the Y-direction end of the insulating layer 340 of the ceiling portion 300, or the two may be separate bodies. When both the fifth core material 413 and the fifth heat insulating layer are provided, the fifth core material 413 and the fifth heat insulating layer are arranged side by side in the YY' direction.

[0196] The fifth wall portion 410 further has a fifth engagement protrusion 414 that protrudes toward the first wall portion 210 (Y' direction side) in the closed state and / or a fifth engagement recess 415 that is recessed on the opposite side (Y direction side) from the first wall portion 210 in the closed state. The fifth engagement protrusion 414 fits into the first engagement recess 213a1 of the first wall portion 210 in a manner that allows it to be inserted and removed in the Z-Z' direction in the closed state. When the fifth engagement protrusion 414 fits into the first engagement recess 213a1 of the first wall portion 210, the fifth engagement protrusion 414 is configured to be in close contact with or abut against the bottom surface of the first engagement recess 213a1. In the closed state, the first engagement protrusion 213a2 of the first wall portion 210 fits into the fifth engagement recess 415 in a manner that allows it to be inserted and removed in the Z-Z' direction. When the first engaging protrusion 213a2 is fitted into the fifth engaging recess 415, the first engaging protrusion 213a2 is in close contact with or abuts against the bottom surface of the fifth engaging recess 415.

[0197] The fifth engaging protrusion 414 and / or the fifth engaging recess 415 may be provided on the first surface of the fifth core material 413 or the fifth heat insulating layer on the Y' direction side.

[0198] For example, the fifth engaging protrusion 414 is made of an elastic material (e.g., rubber or synthetic resin) (see Figures 1D and 3D). The fifth engaging protrusion 414 is separate from the fifth core material 413 or the fifth insulating layer, and is fixed to a first surface on the Y'-direction side of the fifth core material 413 or the fifth insulating layer so as to be convex in the Y' direction, and is covered by the fifth inner outer covering material 412. Therefore, the fifth inner outer covering material 412 is flexible according to the shape of the fifth engaging protrusion 414.

[0199] Alternatively, the fifth engaging protrusion 414 may be a protrusion made of the same material as the fifth core material 413 and integrally provided on the first surface of the fifth core material 413 so as to protrude in the Y' direction (not shown). The first surface of the fifth core material 413 comes into surface contact with the fifth inner outer covering material 412, causing the fifth inner outer covering material 412 to flex in accordance with the shape of the fifth engaging protrusion 414.

[0200] The fifth engaging protrusion 414 may be elongated and extend in the XX' direction, but is not limited to this.

[0201] The fifth engagement recess 415 is provided on a first surface of the fifth core material 413, is recessed in the Y direction, and is open at least in the Y' direction (not shown). The first surface of the fifth core material 413 comes into surface contact with the fifth inner outer covering material 412, causing the fifth inner outer covering material 412 to flex according to the shape of the fifth engagement recess 415.

[0202] The fifth engagement recess 415 may be elongated in the XX' direction and open in the X and X' directions, but is not limited to this.

[0203] When both the fifth engagement protrusion 414 and the fifth engagement recess 415 are provided, the fifth engagement recess 415 may be a recess in the fifth wall 410 between the fifth engagement protrusion 414 and the ceiling 300 (see FIGS. 1D and 3D). The fifth engagement recess 415 is located on the Z direction side of the fifth engagement protrusion 414. The fifth engagement recess 415 is recessed in the Y direction. In this case as well, the fifth engagement recess 415 may be elongated and extend in the X-X' direction, but is not limited to this.

[0204] The side wall 400 has a sixth wall portion 420 on the Y'-direction side. When the side wall 400 has a generally polygonal cylindrical shape, the sixth wall portion 420 is a portion forming one side of the side wall 400 on the Y'-direction side when viewed from the Z-direction side (see FIGS. 1A to 3E) or a generally V-shaped portion (not shown) on the Y'-direction side of the side wall 400. When the side wall 400 has a generally cylindrical shape, the sixth wall portion 420 is an arc-shaped portion (not shown) on the Y'-direction side of the side wall 400 when viewed from the Z-direction side. In the closed state, the sixth wall portion 420 and the second wall portion 220 face each other in the Y-Y' direction.

[0205] The sixth wall portion 420 has a sixth outer covering material 421 on the Y' direction side (outside) and a sixth inner covering material 422 on the Y direction side (inside). The sixth outer covering material 421 forms the Y' direction side covering of the sixth wall portion 420 and is made of the same material as the first outer covering material 211 of the first wall portion 210. The Z direction end of the sixth outer covering material 421 may be integrally connected to the Y' direction end of the covering material 310 of the ceiling portion 300 (not shown), or the two may be separate bodies and the Z direction end of the sixth outer covering material 421 may be connected to the Y' direction end of the covering material 310 of the ceiling portion 300 (see FIGS. 1D and 3D). The sixth inner outer covering material 422 forms an outer covering on the Y'-direction side of the sixth wall portion 420, and is made of the same material as the first outer outer covering material 211 of the first wall portion 210. The Z-direction side portion of the sixth inner outer covering material 422 may be integrally connected to the Y'-direction side end of the outer covering material 320 of the ceiling portion 300 (not shown), or the two may be separate bodies, and the Z-direction side portion of the sixth inner outer covering material 422 may be connected to the Y'-direction side end of the outer covering material 320 of the ceiling portion 300 (see Figures 1D and 3D). In the closed state, the sixth inner outer covering material 422 and the second outer outer covering material 221 face each other.

[0206] The sixth wall portion 420 further includes a sixth core material 423 (see FIGS. 1D and 3D ) and / or a sixth insulating layer (not shown). The sixth core material 423 is made of the same material as the first core material 213 of the first wall portion 210 and is disposed between the sixth outer covering material 421 and the sixth inner covering material 422. The Z-direction end of the sixth core material 423 may be integrally connected to the Y′-direction end of the core material 330 of the ceiling portion 300, or the two may be separate bodies. The sixth insulating layer, like the first insulating layer 214 of the first wall portion 210, may include at least one insulating sheet as described above and may further include at least one heat-shielding sheet as described above. The Z-direction end of the sixth insulating layer may be integrally connected to the Y′-direction end of the insulating layer 340 of the ceiling portion 300, or the two may be separate bodies. When both the sixth core material 423 and the sixth heat insulating layer are provided, the sixth core material 423 and the sixth heat insulating layer are arranged side by side in the YY' direction.

[0207] The sixth wall portion 420 further has a sixth engagement protrusion 424 that protrudes toward the second wall portion 220 (Y direction side) in the closed state and / or a sixth engagement recess 425 that is recessed on the opposite side (Y' direction side) from the second wall portion 220 in the closed state. The sixth engagement protrusion 424 fits into the second engagement recess 223a1 of the second wall portion 220 in a manner that allows it to be inserted and removed in the Z-Z' direction in the closed state. When the sixth engagement protrusion 424 fits into the second engagement recess 223a1 of the second wall portion 220, the sixth engagement protrusion 424 is configured to be in close contact with or abut against the bottom surface of the second engagement recess 223a1. In the closed state, the second engagement protrusion 223a2 of the second wall portion 220 fits into the sixth engagement recess 425 in a manner that allows it to be inserted and removed in the Z-Z' direction. When the second engaging protrusion 223a2 is fitted into the sixth engaging recess 425, the second engaging protrusion 223a2 is in close contact with or abuts against the bottom surface of the sixth engaging recess 425.

[0208] The sixth engaging protrusion 424 and / or the sixth engaging recess 425 may be provided on the first surface of the sixth core material 423 or the sixth heat insulating layer on the Y' direction side.

[0209] For example, the sixth engaging protrusion 424 is made of an elastic material (e.g., rubber or synthetic resin) (see Figures 1D and 3D). The sixth engaging protrusion 424 is separate from the sixth core material 423 or the sixth insulating layer, and is fixed to a first surface on the Y-direction side of the sixth core material 423 or the sixth insulating layer so as to be convex in the Y-direction, and is covered by the sixth inner outer covering material 422. Therefore, the sixth inner outer covering material 422 is flexible according to the shape of the sixth engaging protrusion 424.

[0210] Alternatively, the sixth engaging protrusion 424 may be a protrusion made of the same material as the sixth core material 423 and integrally provided on the first surface of the sixth core material 423 so as to protrude in the Y direction (not shown). The first surface of the sixth core material 423 comes into surface contact with the sixth inner outer covering material 422, causing the sixth inner outer covering material 422 to flex in accordance with the shape of the sixth engaging protrusion 424.

[0211] The sixth engaging protrusion 424 may be elongated and extend in the XX' direction, but is not limited to this.

[0212] The sixth engagement recess 425 is provided on a first surface of the sixth core material 423, is recessed in the Y' direction, and is open at least in the Y direction (not shown). The first surface of the sixth core material 423 comes into surface contact with the sixth inner outer covering material 422, causing the sixth inner outer covering material 422 to flex according to the shape of the sixth engagement recess 425.

[0213] The sixth engagement recess 425 may be elongated in the XX' direction and open in the X and X' directions, but is not limited to this.

[0214] When both the sixth engagement protrusion 424 and the sixth engagement recess 425 are provided, the sixth engagement recess 425 may be a recess in the sixth wall 420 between the sixth engagement protrusion 424 and the ceiling 300 (see FIGS. 1D and 3D). The sixth engagement recess 425 is located on the Z direction side of the sixth engagement protrusion 424. The sixth engagement recess 425 is recessed in the Y' direction. In this case as well, the sixth engagement recess 425 may be elongated and extend in the X-X' direction, but is not limited to this.

[0215] The side wall 400 has a seventh wall portion 430 on the X-direction side. When the side wall 400 has a substantially polygonal cylindrical shape, the seventh wall portion 430 is a portion forming one side of the side wall 400 on the X-direction side when viewed from the Z-direction side (see FIGS. 1A to 3E) or a substantially V-shaped portion (not shown) on the X-direction side of the side wall 400. When the side wall 400 has a substantially cylindrical shape, the seventh wall portion 430 is an arc-shaped portion (not shown) on the X-direction side of the side wall 400 when viewed from the Z-direction side. In the closed state, the seventh wall portion 430 and the third wall portion 230 face each other in the X-X' direction.

[0216] The seventh wall portion 430 has a seventh outer covering material 431 on the X-direction side (outside) and a seventh inner covering material 432 on the X'-direction side (inside). The seventh outer covering material 431 forms the covering on the X-direction side of the seventh wall portion 430 and is made of the same material as the first outer covering material 211 of the first wall portion 210. The Z-direction end of the seventh outer covering material 431 may be integrally connected to the X-direction end of the covering material 310 of the ceiling portion 300 (not shown). Alternatively, the two may be separate bodies, and the Z-direction end of the seventh outer covering material 431 may be connected to the X-direction end of the covering material 310 of the ceiling portion 300 (see FIGS. 1E and 3E). The seventh inner covering material 432 forms the covering on the X'-direction side of the seventh wall portion 430 and is made of the same material as the first outer covering material 211 of the first wall portion 210. The Z-direction side portion of the seventh inner outer covering material 432 may be integrally connected to the X-direction side end of the outer covering material 320 of the ceiling portion 300 (not shown), or the two may be separate bodies, with the Z-direction side end of the seventh inner outer covering material 432 connected to the X-direction side portion of the outer covering material 320 of the ceiling portion 300 (see Figures 1E and 3E). In the closed state, the seventh inner outer covering material 432 and the third outer outer covering material 231 face each other.

[0217] The seventh wall portion 430 further includes a seventh core material 433 (see FIGS. 1E and 3E) and / or a seventh insulating layer (not shown). The seventh core material 433 is made of the same material as the first core material 213 of the first wall portion 210 and is disposed between the seventh outer covering material 431 and the seventh inner covering material 432. The Z-direction end of the seventh core material 433 may be integrally connected to the X-direction end of the core material 330 of the ceiling portion 300, or the two may be separate bodies. The seventh insulating layer, like the first insulating layer 214 of the first wall portion 210, may include at least one insulating sheet as described above and may further include at least one heat-shielding sheet as described above. The Z-direction end of the seventh insulating layer may be integrally connected to the X-direction end of the insulating layer 340 of the ceiling portion 300, or the two may be separate bodies. When both the seventh core material 433 and the seventh heat insulating layer are provided, the seventh core material 433 and the seventh heat insulating layer are arranged side by side in the XX' direction.

[0218] The seventh wall portion 430 further has a seventh engagement protrusion 434 that protrudes toward the third wall portion 230 (X' direction side) in the closed state and / or a seventh engagement recess 435 that is recessed on the opposite side (X direction side) from the third wall portion 230 in the closed state. The seventh engagement protrusion 434 fits removably into the third engagement recess 233a1 of the third wall portion 230 in the Z-Z' direction in the closed state. When the seventh engagement protrusion 434 fits into the third engagement recess 233a1 of the third wall portion 230, the seventh engagement protrusion 434 is in close contact with or abuts against the bottom surface of the third engagement recess 233a1. In the closed state, the third engagement protrusion 233a2 of the third wall portion 230 fits removably into the seventh engagement recess 435 in the Z-Z' direction. When the third engagement protrusion 233a2 is fitted into the seventh engagement recess 435, the third engagement protrusion 233a2 is in close contact with or abuts against the bottom surface of the seventh engagement recess 435.

[0219] The seventh engaging protrusion 434 and / or the seventh engaging recess 435 may be provided on the first surface of the seventh core material 433 or the seventh heat insulating layer on the X'-direction side.

[0220] For example, the seventh engaging protrusion 434 is made of an elastic material (e.g., rubber or synthetic resin) (see Figures 1E and 3E). The seventh engaging protrusion 434 is separate from the seventh core material 433 or the seventh insulating layer, and is fixed to a first surface on the X'-direction side of the seventh core material 433 or the seventh insulating layer so as to be convex in the X' direction, and is covered by the seventh inner outer covering material 432. Therefore, the seventh inner outer covering material 432 is flexible according to the shape of the seventh engaging protrusion 434.

[0221] Alternatively, the seventh engaging protrusion 434 may be a protrusion (not shown) that is made of the same material as the seventh core material 433 and is integrally provided on the first surface of the seventh core material 433 so as to protrude in the X' direction. The first surface of the seventh core material 433 comes into surface contact with the seventh inner outer covering material 432, causing the seventh inner outer covering material 432 to flex in accordance with the shape of the seventh engaging protrusion 434.

[0222] The seventh engaging protrusion 434 may be elongated and extend in the XX' direction, but is not limited to this.

[0223] The seventh engagement recess 435 is provided on a first surface of the seventh core material 433, is recessed in the X direction, and is open at least in the X' direction (not shown). The first surface of the seventh core material 433 comes into surface contact with the seventh inner outer covering material 432, causing the seventh inner outer covering material 432 to flex according to the shape of the seventh engagement recess 435.

[0224] The seventh engagement recess 435 may be elongated in the XX' direction and open in the X and X' directions, but is not limited to this.

[0225] When both the seventh engagement protrusion 434 and the seventh engagement recess 435 are provided, the seventh engagement recess 435 may be a recess in the seventh wall 430 between the seventh engagement protrusion 434 and the ceiling 300 (see FIGS. 1E and 3E). The seventh engagement recess 435 is located on the Z direction side of the seventh engagement protrusion 434. The seventh engagement recess 435 is recessed in the X direction. In this case as well, the seventh engagement recess 435 may be elongated and extend in the X-X' direction, but is not limited to this.

[0226] The side wall 400 has an eighth wall portion 440 on the X'-direction side. When the side wall 400 has a generally polygonal cylindrical shape, the eighth wall portion 440 is a portion forming one side of the side wall 400 on the X'-direction side when viewed from the Z-direction side (see FIGS. 1A to 3E) or a generally V-shaped portion (not shown) on the X'-direction side of the side wall 400. When the side wall 400 has a generally cylindrical shape, the eighth wall portion 440 is a circular arc-shaped portion (not shown) on the X'-direction side of the side wall 400 when viewed from the Z-direction side. In the closed state, the eighth wall portion 440 and the fourth wall portion 240 face each other in the X-X' direction.

[0227] The eighth wall portion 440 has an eighth outer covering material 441 on the X'-direction side (outside) and an eighth inner covering material 442 on the X-direction side (inside). The eighth outer covering material 441 forms the covering on the X'-direction side of the eighth wall portion 440 and is made of the same material as the first outer covering material 211 of the first wall portion 210. The Z-direction end of the eighth outer covering material 441 may be integrally connected to the X'-direction end of the covering material 310 of the ceiling portion 300 (not shown), or the two may be separate bodies, and the Z-direction end of the eighth outer covering material 441 may be connected to the X'-direction end of the covering material 310 of the ceiling portion 300 (see FIGS. 1E and 3E). The eighth inner outer covering material 442 forms the outer covering on the X'-direction side of the eighth wall portion 440, and is made of the same material as the first outer outer covering material 211 of the first wall portion 210. The Z-direction side portion of the eighth inner outer covering material 442 may be integrally connected to the X'-direction side end of the outer covering material 320 of the ceiling portion 300 (not shown), or the two may be separate bodies, and the Z-direction side portion of the eighth inner outer covering material 442 may be connected to the X'-direction side end of the outer covering material 320 of the ceiling portion 300 (see Figures 1E and 3E). In the closed state, the eighth inner outer covering material 442 and the fourth outer outer covering material 241 face each other.

[0228] The eighth wall portion 440 further includes an eighth core material 443 (see FIGS. 1E and 3E) and / or an eighth insulating layer (not shown). The eighth core material 443 is made of the same material as the first core material 213 of the first wall portion 210 and is disposed between the eighth outer covering material 441 and the eighth inner covering material 442. The Z-direction end of the eighth core material 443 may be integrally connected to the X'-direction end of the core material 330 of the ceiling portion 300, or the two may be separate bodies. The eighth insulating layer, like the first insulating layer 214 of the first wall portion 210, may include at least one insulating sheet as described above and may further include at least one heat-shielding sheet as described above. The Z-direction end of the eighth insulating layer may be integrally connected to the X'-direction end of the insulating layer 340 of the ceiling portion 300, or the two may be separate bodies. When both the eighth core material 443 and the eighth heat insulating layer are provided, the eighth core material 443 and the eighth heat insulating layer are arranged side by side in the XX' direction.

[0229] The eighth wall portion 440 further has an eighth engagement protrusion 444 that protrudes toward the fourth wall portion 240 (X-direction side) in the closed state and / or an eighth engagement recess 445 that is recessed on the opposite side (X'-direction side) from the fourth wall portion 240 in the closed state. The eighth engagement protrusion 444 is removably fitted into the fourth engagement recess 243a1 of the fourth wall portion 240 in the Z-Z' direction in the closed state. When the eighth engagement protrusion 444 is fitted into the fourth engagement recess 243a1 of the fourth wall portion 240, the eighth engagement protrusion 444 is in close contact with or abuts against the bottom surface of the fourth engagement recess 243a1. In the closed state, the fourth engagement protrusion 243a2 of the fourth wall portion 240 is removably fitted into the eighth engagement recess 445 in the Z-Z' direction. When the fourth engagement protrusion 243a2 is fitted into the eighth engagement recess 445, the fourth engagement protrusion 243a2 is in close contact with or abuts against the bottom surface of the eighth engagement recess 445.

[0230] The eighth engaging protrusion 444 and / or the eighth engaging recess 445 may be provided on a first surface of the eighth core material 443 or the eighth heat insulating layer on the X'-direction side.

[0231] For example, the eighth engaging protrusion 444 is made of an elastic material (e.g., rubber or synthetic resin) (see FIGS. 1E and 3E). The eighth engaging protrusion 444 is separate from the eighth core material 443 or the eighth insulating layer, and is fixed to a first surface on the X-direction side of the eighth core material 443 or the eighth insulating layer so as to be convex in the X-direction, and is covered by the eighth inner outer covering material 442. Therefore, the eighth inner outer covering material 442 is flexible according to the shape of the eighth engaging protrusion 444.

[0232] Alternatively, the eighth engaging protrusion 444 may be a protrusion (not shown) that is made of the same material as the eighth core material 443 and is integrally provided on the first surface of the eighth core material 443 so as to be protruding in the X direction. The first surface of the eighth core material 443 comes into surface contact with the eighth inner outer covering material 442, causing the eighth inner outer covering material 442 to flex in accordance with the shape of the eighth engaging protrusion 444.

[0233] The eighth engaging protrusion 444 may be elongated and extend in the XX' direction, but is not limited to this.

[0234] The eighth engagement recess 445 is provided on a first surface of the eighth core material 443, is recessed in the X' direction, and is open at least in the X direction (not shown). The first surface of the eighth core material 443 comes into surface contact with the eighth inner outer covering material 442, causing the eighth inner outer covering material 442 to flex according to the shape of the eighth engagement recess 445.

[0235] The eighth engagement recess 445 may be elongated in the XX' direction and open in the X and X' directions, but is not limited to this.

[0236] When both the eighth engagement protrusion 444 and the eighth engagement recess 445 are provided, the eighth engagement recess 445 may be a recess in the eighth wall 440 between the eighth engagement protrusion 444 and the ceiling 300 (see FIGS. 1E and 3E). The eighth engagement recess 445 is located on the Z direction side of the eighth engagement protrusion 444. The eighth engagement recess 445 is recessed in the X' direction. In this case, the eighth engagement recess 445 may also be elongated and extend in the X-X' direction, but is not limited to this.

[0237] The fifth outer covering material 411, the seventh outer covering material 431, the sixth outer covering material 421, and the eighth outer covering material 441 may be integrally connected to form a generally cylindrical shape. The X-direction end of adjacent fifth outer covering materials 411 and the Y-direction end of the seventh outer covering material 431 are integrally connected, the X'-direction end of adjacent fifth outer covering materials 411 and the Y-direction end of the eighth outer covering material 441 are integrally connected, the X-direction end of adjacent sixth outer covering materials 421 and the Y'-direction end of the seventh outer covering material 431 are integrally connected, and the X'-direction end of adjacent sixth outer covering materials 421 and the Y'-direction end of the seventh outer covering material 431 are integrally connected, and the X'-direction end of adjacent sixth outer covering materials 421 and the Y'-direction end of the eighth outer covering material 441 are integrally connected.

[0238] Alternatively, the fifth outer covering material 411, the seventh outer covering material 431, the sixth outer covering material 421, and the eighth outer covering material 441 may be separate bodies. The X-direction ends of adjacent fifth outer covering materials 411 are connected to the Y-direction ends of the seventh outer covering material 431, the X'-direction ends of adjacent fifth outer covering materials 411 are connected to the Y-direction ends of the eighth outer covering material 441, the X-direction ends of adjacent sixth outer covering materials 421 are connected to the Y'-direction ends of the seventh outer covering material 431, and the X'-direction ends of adjacent sixth outer covering materials 421 are connected to the Y'-direction ends of the eighth outer covering material 441. The fifth outer covering material 411, the seventh outer covering material 431, the sixth outer covering material 421 and the eighth outer covering material 441 connected in this manner form a substantially cylindrical shape.

[0239] The fifth inner outer covering material 412, the seventh inner outer covering material 432, the sixth inner outer covering material 422, and the eighth inner outer covering material 442 may be integrally connected to form a generally cylindrical shape. The X-direction end of adjacent fifth inner outer covering materials 412 and the Y-direction end of the seventh inner outer covering material 432 are integrally connected, the X'-direction end of adjacent fifth inner outer covering materials 412 and the Y-direction end of the eighth inner outer covering material 442 are integrally connected, the X-direction end of adjacent sixth inner outer covering materials 422 and the Y'-direction end of the seventh inner outer covering material 432 are integrally connected, and the X'-direction end of adjacent sixth inner outer covering materials 422 and the Y'-direction end of the eighth inner outer covering material 442 are integrally connected.

[0240] Alternatively, the fifth inner outer covering material 412, the seventh inner outer covering material 432, the sixth inner outer covering material 422, and the eighth inner outer covering material 442 may be separate bodies. The X-direction ends of adjacent fifth inner outer covering materials 412 are connected to the Y-direction ends of the seventh inner outer covering material 432, the X'-direction ends of adjacent fifth inner outer covering materials 412 are connected to the Y-direction ends of the eighth inner outer covering material 442, the X-direction ends of adjacent sixth inner outer covering materials 422 are connected to the Y'-direction ends of the seventh inner outer covering material 432, and the X'-direction ends of adjacent sixth inner outer covering materials 422 are connected to the Y'-direction ends of the eighth inner outer covering material 442. The fifth inner outer covering material 412, the seventh inner outer covering material 432, the sixth inner outer covering material 422 and the eighth inner outer covering material 442 connected in this manner form a substantially cylindrical shape.

[0241] The fifth core material 413, the seventh core material 433, the sixth core material 423, and the eighth core material 443 may be integrally connected to form a generally cylindrical shape. The X-direction end of adjacent fifth core material 413 and the Y-direction end of the seventh core material 433 are integrally connected, the X'-direction end of adjacent fifth core material 413 and the Y-direction end of the eighth core material 443 are integrally connected, the X-direction end of adjacent sixth core material 423 and the Y'-direction end of the seventh core material 433 are integrally connected, and the X'-direction end of adjacent sixth core material 423 and the Y'-direction end of the eighth core material 443 are integrally connected. Alternatively, the fifth core material 413, the seventh core material 433, the sixth core material 423, and the eighth core material 443 may be separate bodies.

[0242] The fifth engagement protrusion 414 of the fifth core material 413, the seventh engagement protrusion 434 of the seventh core material 433, the sixth engagement protrusion 424 of the sixth core material 423, and the eighth engagement protrusion 444 of the eighth core material 443 may be connected to form a single, generally annular convex portion, or may be separated from one another. Similarly, the fifth engagement recess 415 of the fifth core material 413, the seventh engagement recess 435 of the seventh core material 433, the sixth engagement recess 425 of the sixth core material 423, and the eighth engagement recess 445 of the eighth core material 443 may be connected to form a single, generally annular recess, or may be separated from one another.

[0243] The fifth, seventh, sixth, and eighth insulating layers may be integrally connected to form a generally cylindrical shape. The X-direction ends of adjacent fifth insulating layers and the Y-direction ends of the seventh insulating layer are integrally connected, the X'-direction ends of adjacent fifth insulating layers and the Y-direction ends of the fourth insulating layer are integrally connected, the X-direction ends of adjacent sixth insulating layers and the Y'-direction ends of the seventh insulating layer are integrally connected, and the X'-direction ends of adjacent sixth insulating layers and the Y'-direction ends of the fourth insulating layer are integrally connected. Alternatively, the fifth, seventh, sixth, and eighth insulating layers may be separate bodies.

[0244] The lid B12 may further include a third engagement portion 500 and / or a fourth engagement portion 500. The third engagement portion 500 has a tongue portion 510 and an engagement portion main body 520 provided on the tongue portion 510. The tongue portion 510 of the third engagement portion 500 is fixed to the fifth wall portion 410 of the lid B12 and hangs down in the Z' direction. In the closed state, the engagement portion main body 520 of the third engagement portion 500 of the lid B12 and the first engagement portion 250 of the main body B11 are adapted to engage with each other.

[0245] For example, if either the engaging portion main body 520 of the third engaging portion 500 or the first engaging portion 250 is a magnet, the other may be a magnet or a magnetic material to which the magnet can be attracted (see FIGS. 1A to 3E). The engaging portion main body 520 of the third engaging portion 500 and the first engaging portion 250 may be hook-and-loop fasteners that are detachable from each other (not shown). If either the engaging portion main body 520 of the third engaging portion 500 or the first engaging portion 250 is a mating convex portion (for example, a male snap button having a mating convex portion), the other may be a mating recess or mating hole into which the mating convex portion fits (for example, a female snap button having a mating recess or mating hole) (not shown).

[0246] The fourth engagement portion 500 has a tongue portion 510 and an engagement portion main body 520 provided on the tongue portion 510. The tongue portion 510 of the fourth engagement portion 500 is fixed to the sixth wall portion 420 of the lid B12 and hangs down in the Z' direction. The engagement portion main body 520 of the fourth engagement portion 500 of the lid B12 and the second engagement portion 250 of the main body B11 are adapted to engage with each other.

[0247] The engaging portion main body 520 and the second engaging portion 250 of the fourth engaging portion 500 can be configured similarly to the engaging portion main body 520 and the first engaging portion 250 of the third engaging portion 500 described above.

[0248] A method for attaching the lid B12 to the main body B11 will be described in detail below.

[0249] The lid B12 is brought relatively close to the main body B11 in the Z-Z' direction, and the side wall 200 of the main body B11 is inserted into the side wall 400 of the lid B12. Then, the side wall 200 of the main body B11 abuts against the ceiling portion 300 of the lid B12 from the Z' direction side. At the same time, the fifth wall portion 410, sixth wall portion 420, seventh wall portion 430, and eighth wall portion 440 of the side wall 400 of the lid B12 are arranged around the first wall portion 210, second wall portion 220, third wall portion 230, and fourth wall portion 240 of the side wall 200 of the main body B11.

[0250] At this time, the fifth engagement protrusion 414 of the fifth wall portion 410 fits into the first engagement recess 213a1 of the first wall portion 210 from the Z direction side, and / or the first engagement protrusion 213a2 of the first wall portion 210 fits into the fifth engagement recess 415 of the fifth wall portion 410 from the Z' direction side. At the same time, the sixth engagement protrusion 424 of the sixth wall portion 420 fits into the second engagement recess 223a1 of the second wall portion 220 from the Z direction side, and / or the second engagement protrusion 223a2 of the second wall portion 220 fits into the sixth engagement recess 425 of the sixth wall portion 420 from the Z' direction side. At the same time, the seventh engagement protrusion 434 of the seventh wall portion 430 fits into the third engagement recess 233a1 of the third wall portion 230 from the Z direction side, and / or the third engagement protrusion 233a2 of the third wall portion 230 fits into the seventh engagement recess 435 of the seventh wall portion 430 from the Z' direction side. At the same time, the eighth engagement protrusion 444 of the eighth wall portion 440 fits into the fourth engagement recess 243a1 of the fourth wall portion 240 from the Z direction side, and / or the fourth engagement protrusion 243a2 of the fourth wall portion 240 fits into the eighth engagement recess 445 of the eighth wall portion 440 from the Z' direction side.

[0251] In this way, the cover B12 closes the opening of the main body B11, and the cover B12 is in a closed state.

[0252] A method for removing the lid B12 from the main body B11 will be described in detail below.

[0253] The lid B12 is moved away from the body B11 in the ZZ' direction, and the side wall 200 of the body B11 is removed from within the side wall 400 of the lid B12.

[0254] At this time, the fifth engagement protrusion 414 of the fifth wall portion 410 disengages in the Z' direction from the first engagement recess 213a1 of the first wall portion 210, and / or the first engagement protrusion 213a2 of the first wall portion 210 disengages in the Z direction into the fifth engagement recess 415 of the fifth wall portion 410. The sixth engagement protrusion 424 of the sixth wall portion 420 disengages in the Z' direction from the second engagement recess 223a1 of the second wall portion 220, and / or the second engagement protrusion 223a2 of the second wall portion 220 disengages in the Z direction into the sixth engagement recess 425 of the sixth wall portion 420. The seventh engagement protrusion 434 of the seventh wall portion 430 disengages in the Z' direction from the third engagement recess 233a1 of the third wall portion 230, and / or the third engagement protrusion 233a2 of the third wall portion 230 disengages in the Z direction from the seventh engagement recess 435 of the seventh wall portion 430. The eighth engagement protrusion 444 of the eighth wall portion 440 disengages in the Z' direction from the fourth engagement recess 243a1 of the fourth wall portion 240, and / or the fourth engagement protrusion 243a2 of the fourth wall portion 240 disengages in the Z direction from the eighth engagement recess 445 of the eighth wall portion 440.

[0255] In this way, the cover B12 is removed from the main body B11 and is in an open state.

[0256] The heat and cold insulation bag B1 as described above has the following technical features and effects (1) to (6).

[0257] (1) Technical features and effects The first surface 213a of the first core material 213 comes into surface contact with the first outer covering material 211 directly or indirectly via a first separate member, causing the first outer covering material 211 to flex in accordance with the shape of the first engaging recess 213a1 and / or the first engaging protrusion 213a2 of the first core material 213. Therefore, even if the first outer covering material 211 and the first inner covering material 212 of the first wall portion 210 are made of a flexible material, the first engaging recess 213a1 and / or the first engaging protrusion 213a2 of the first core material 213 can be exposed on the first outer covering material 211. Similarly, by having the first surface 223a of the second core material 223 come into surface contact with the second outer covering material 221 directly or indirectly via a second separate member, the second engaging recess 223a1 and / or the second engaging protrusion 223a2 of the second core material 223 can be exposed to the second outer covering material 221, and by having the first surface 233a of the third core material 233 come into surface contact with the third outer covering material 231 directly or indirectly via a third separate member, The third engaging recess 233a1 and / or the third engaging protrusion 233a2 of the third core 233 can be exposed in the third outer cover material 231, and the first surface 243a of the fourth core 243 can be in surface contact with the fourth outer cover material 241 directly or indirectly via a fourth separate member, thereby exposing the fourth engaging recess 243a1 and / or the fourth engaging protrusion 243a2 of the fourth core 243 in the fourth outer cover material 241. In this way, a novel thermal insulation / cold insulation bag B1 was obtained.

[0258] (2) Technical features and effects The fifth engagement protrusion 414 of the fifth wall portion 410 fits into the first engagement recess 213a1 of the first wall portion 210 from the Z direction side, and / or the first engagement protrusion 213a2 of the first wall portion 210 fits into the fifth engagement recess 415 of the fifth wall portion 410 from the Z' direction side. The sixth engagement protrusion 424 of the sixth wall portion 420 fits into the second engagement recess 223a1 of the second wall portion 220 from the Z direction side, and / or the second engagement protrusion 223a2 of the second wall portion 220 fits into the sixth engagement recess 425 of the sixth wall portion 420 from the Z' direction side. The seventh engagement protrusion 434 of the seventh wall portion 430 fits into the third engagement recess 233a1 of the third wall portion 230 from the Z direction side, and / or the third engagement protrusion 233a2 of the third wall portion 230 fits into the seventh engagement recess 435 of the seventh wall portion 430 from the Z' direction side. The eighth engagement protrusion 444 of the eighth wall portion 440 fits into the fourth engagement recess 243a1 of the fourth wall portion 240 from the Z direction side, and / or the fourth engagement protrusion 243a2 of the fourth wall portion 240 fits into the eighth engagement recess 445 of the eighth wall portion 440 from the Z' direction side. This makes it easy to attach and detach the lid B12 to and from the main body B11, and as a result, makes it easy to open and close the lid B12.

[0259] (3) Technical features and effects In the closed state, when the fifth engagement protrusion 414 is in close contact with the bottom surface of the first engagement recess 213a1 and / or the first engagement protrusion 213a2 is in close contact with the bottom surface of the fifth engagement recess 415, the sixth engagement protrusion 424 is in close contact with the bottom surface of the second engagement recess 223a1 and / or the second engagement protrusion 223a2 is in close contact with the bottom surface of the sixth engagement recess 425, the seventh engagement protrusion 434 is in close contact with the bottom surface of the third engagement recess 233a1 and / or the third engagement protrusion 233a2 is in close contact with the bottom surface of the seventh engagement recess 435, and the eighth engagement protrusion 444 is in close contact with the bottom surface of the fourth engagement recess 243a1 and / or the fourth engagement protrusion 243a2 is in close contact with the bottom surface of the eighth engagement recess 445, the airtightness between the lid B12 and the main body B11 in the closed state is improved. In particular, when the fifth engagement protrusion 414 of the fifth core material 413, the seventh engagement protrusion 434 of the seventh core material 433, the sixth engagement protrusion 424 of the sixth core material 423, and the eighth engagement protrusion 444 of the eighth core material 443 form a substantially annular convex portion, and the first engagement recess 213a1 of the first core material 213, the third engagement recess 233a1 of the third core material 233, the second engagement recess 223a1 of the second core material 223, and the fourth engagement recess 243a1 of the fourth core material 243 form a substantially annular recess, and / or the fifth engagement recess 415 of the fifth core material 413 When the seventh engagement recess 435 of the seventh core material 433, the sixth engagement recess 425 of the sixth core material 423 and the eighth engagement recess 445 of the eighth core material 443 are connected to form one approximately annular recess, and when the first engagement protrusion 213a2 of the first core material 213, the third engagement protrusion 233a2 of the third core material 233, the second engagement protrusion 223a2 of the second core material 223 and the fourth engagement protrusion 243a2 of the fourth core material 243 are connected to form one approximately annular protrusion, the airtightness between the lid B12 and the main body B11 in the closed state is further improved.

[0260] (4) Technical features and effects When the first core 213 has the configuration (1) above, the second core 223 has the configuration (3) above, the third core 233 has the configuration (5) above, and the fourth core 243 has the configuration (7) above, the first core 213, the second core 223, the third core 233, and the fourth core 243 are not built into the second portion of the first wall portion 210, the second portion of the second wall portion 220, the second portion of the third wall portion 230, and the second portion of the fourth wall portion 240. This reduces the cost of the thermal insulation / cooler bag B1. Moreover, the second portion of the first wall portion 210, the second portion of the second wall portion 220, the second portion of the third wall portion 230, and the second portion of the fourth wall portion 240 are made of a flexible material, as described above. Therefore, when a user comes into contact with the second portion of the first wall portion 210, the second portion of the second wall portion 220, the second portion of the third wall portion 230, or the second portion of the fourth wall portion 240, the second portion of the first wall portion 210, the second portion of the second wall portion 220, the second portion of the third wall portion 230, and the second portion of the fourth wall portion 240 become soft against the user. Furthermore, contents having a dimension in the Y-Y' direction that is slightly larger than the dimension in the Y-Y' direction between the second portion of the first wall portion 210 and the second portion of the second wall portion 220 can be stored in the main body B11. This is because the second portion of the first wall portion 210 and the second portion of the second wall portion 220 are flexible even when the contents come into contact with the second portion of the first wall portion 210 and the second portion of the second wall portion 220. Similarly, the main body B11 can accommodate contents having a dimension in the X-X' direction that is slightly larger than the dimension in the X-X' direction between the second portion of the third wall portion 230 and the second portion of the fourth wall portion 240. This is because the second portion of the third wall portion 230 and the second portion of the fourth wall portion 240 are flexible even if the contents hit the second portion of the third wall portion 230 and the second portion of the fourth wall portion 240.

[0261] (5) Technical features and effects When the first insulating layer 214 has the configuration (1-1-2), (1-1-3), (1-1-5), (1-1-6) or (1-1-8) above and a gap is formed between the first part 214a of the first insulating layer 214 and the second surface 213b of the first core material 213, or when the first insulating layer 214 has the configuration (1-1-1), (1-1-4) or (1-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2141 according to the shape of the recess 213b2 and / or recess 213b3 and at least one second insulating sheet 2141, the gap functions as air insulation. When the second insulating layer 224 has the configuration (3-1-2), (3-1-3), (3-1-5), (3-1-6) or (3-1-8) above and a gap is formed between the first part 224a of the second insulating layer 224 and the second surface 223b of the second core material 223, or when the second insulating layer 224 has the configuration (3-1-1), (3-1-4) or (3-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2241 according to the shape of the recess 223b2 and / or recess 223b3 and at least one second insulating sheet 2241, the gap functions as air insulation. When the third insulating layer 234 has the configuration (5-1-2), (5-1-3), (5-1-5), (5-1-6) or (5-1-8) above and a gap is formed between the first part 234a of the third insulating layer 234 and the second surface 233b of the third core material 233, or when the third insulating layer 234 has the configuration (5-1-1), (5-1-4) or (5-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2341 according to the shape of the recess 233b2 and / or recess 233b3 and at least one second insulating sheet 2341, the gap functions as air insulation.When the fourth insulating layer 244 has the configuration (7-1-2), (7-1-3), (7-1-5), (7-1-6) or (7-1-8) above and a gap is formed between the first part 244a of the fourth insulating layer 244 and the second surface 243b of the fourth core material 243, or when the fourth insulating layer 244 has the configuration (7-1-1), (7-1-4) or (7-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2441 according to the shape of the recess 243b2 and / or recess 243b3 and at least one second insulating sheet 2441, the gap functions as air insulation.

[0262] (6) Technical features and effects When the first core material 213 has the configuration (1) above, the second core material 223 has the configuration (3) above, the third core material 233 has the configuration (5) above, and the fourth core material 243 has the configuration (7) above, the second part of the first wall portion 210, the second part of the second wall portion 220, the second part of the third wall portion 230, and the second part of the fourth wall portion 240 can be configured to be valley-folded or mountain-folded. [Example]

[0263] Hereinafter, a thermal insulation bag B2 according to a second embodiment of the present invention and several other embodiments including its design variations will be described with reference to Figures 4A and 4B. Figures 4A and 4B show the thermal insulation bag B2 according to the second embodiment. In Figure 4A, the Z-Z' direction and the Y-Y' direction are shown in the same manner as in Figure 1D, and in Figure 4B, the Z-Z' direction and the X-X' direction are shown in the same manner as in Figure 1E.

[0264] The thermal insulated / cold bag B2 has the same configuration as the thermal insulated / cold bag B1, except that the configurations of the second wall 220', the third wall 230', and the fourth wall 240' of the side wall 200' of the main body B11' are different from the configurations of the second wall 220, the third wall 230, and the fourth wall 240 of the side wall 200 of the main body B11 of the thermal insulated / cold bag B1. Only these differences will be described in detail below, and explanations of the thermal insulated / cold bag B2 that overlap with the explanation of the thermal insulated / cold bag B1 will be omitted.

[0265] The second wall portion 220' of the thermal insulation / cold insulation bag B2 differs from the second wall portion 220 of the thermal insulation / cold insulation bag B1 in that it does not have a second core material 223. The second wall portion 220' may be configured such that a second insulating layer 224 is disposed between the second outer covering material 221 and the second inner covering material 222. The second portion 224b of the second insulating layer 224 is disposed between the second portion 221b of the second outer covering material 221 and the second portion 222b of the second inner covering material 222. When the first portion 224a of the second insulating layer 224 is provided, the first portion 224a of the second insulating layer 224 is disposed between the first portion 221a of the second outer covering material 221 and the first portion 222a of the second inner covering material 222. The second insulating layer 224 has at least one insulating sheet 2241 described above. The second insulating layer 224 may further include at least one heat shielding sheet as described above, but does not necessarily have to include it. The second wall portion 220' may further include at least one second intermediate layer as described above, but does not necessarily have to include it.

[0266] The first part of the second wall portion 220' has a first part 221a which is the Z-direction side portion of the second outer covering material 221, a first part 222a which is the Z-direction side portion of the second inner covering material 222, and a first part 224a (only if provided) of the second insulating layer 224. The second part of the second wall portion 220' has a second part 221b which is the Z'-direction side portion of the second outer covering material 221, a second part 222b which is the Z'-direction side portion of the second inner covering material 222, and a second part 224b of the second insulating layer 224. The second insulating layer 224 can be omitted.

[0267] The third wall portion 230' of the thermal insulation / cold bag B2 differs from the third wall portion 230 of the thermal insulation / cold bag B1 in that it does not have a third core 233. The third wall portion 230' may be configured such that a third insulating layer 234 is disposed between the third outer covering material 231 and the third inner covering material 232. The second portion 234b of the third insulating layer 234 is disposed between the second portion 231b of the third outer covering material 231 and the second portion 232b of the third inner covering material 232. When the first portion 234a of the third insulating layer 234 is provided, the first portion 234a of the third insulating layer 234 is disposed between the first portion 231a of the third outer covering material 231 and the first portion 232a of the third inner covering material 232. The third insulating layer 234 has at least one insulating sheet 2341 described above. The third insulating layer 234 may further include at least one heat shielding sheet as described above, but does not necessarily have to include it. The third wall portion 230' may further include at least one third intermediate layer as described above, but does not necessarily have to include it.

[0268] The first part of the third wall portion 230' has a first part 231a which is the Z-direction side portion of the third outer covering material 231, a first part 232a which is the Z-direction side portion of the third inner covering material 232, and a first part 234a (only if provided) of the third insulating layer 234. The second part of the third wall portion 230' has a second part 231b which is the Z'-direction side portion of the third outer covering material 231, a second part 232b of the third inner covering material 232 which is the Z'-direction side portion of the third inner covering material 232, and a second part 234b of the third insulating layer 234. Note that the third insulating layer 234 can be omitted.

[0269] The fourth wall portion 240' of the thermal insulation / cold bag B2 differs from the fourth wall portion 240 of the thermal insulation / cold bag B1 in that it does not have a fourth core 243. The fourth wall portion 240' may be configured such that a fourth insulating layer 244 is disposed between the fourth outer covering material 241 and the fourth inner covering material 242. The second portion 244b of the fourth insulating layer 244 is disposed between the second portion 241b of the fourth outer covering material 241 and the second portion 242b of the fourth inner covering material 242. When the first portion 244a of the fourth insulating layer 244 is provided, the first portion 244a of the fourth insulating layer 244 is disposed between the first portion 241a of the fourth outer covering material 241 and the first portion 242a of the fourth inner covering material 242. The fourth insulating layer 244 has at least one insulating sheet 2441 described above. The fourth insulating layer 244 may further include at least one heat shielding sheet as described above, but does not necessarily have to include it. The fourth wall portion 240' may further include at least one fourth intermediate layer as described above, but does not necessarily have to include it. The fourth insulating layer 244 can be omitted.

[0270] The first part of the fourth wall portion 240' has a first part 241a which is the Z-direction side portion of the fourth outer outer covering material 241, a first part 242a which is the Z-direction side portion of the fourth inner outer covering material 242, and a first part 244a (only if provided) of the fourth insulating layer 244. The second part of the fourth wall portion 240' has a second part 241b of the fourth outer outer covering material 241 which is the Z'-direction side portion of the fourth outer outer covering material 241, a second part 242b which is the Z'-direction side portion of the fourth inner outer covering material 242, and a second part 244b of the fourth insulating layer 244.

[0271] The sixth wall 420 of the lid B12 of the thermal insulation / cold insulation bag B2 has the sixth engaging protrusion 424 described above, and in the closed state, the sixth engaging protrusion 424 may be in close contact with or abut against the second wall 220' from the Y' direction side (see FIG. 4A). Alternatively, the sixth wall 420 may be configured so that the sixth engaging protrusion 424 and the sixth engaging recess 425 are omitted (not shown).

[0272] The seventh wall 430 of the lid B12 of the thermal insulation / cold insulation bag B2 has the above-mentioned seventh engaging protrusion 434, and in the closed state, the seventh engaging protrusion 434 may be in close contact with or abut against the third wall 230' from the X direction side (see FIG. 4B). Alternatively, the seventh wall 430 may be configured so that the seventh engaging protrusion 434 and the seventh engaging recess 435 are omitted (not shown).

[0273] The eighth wall 440 of the lid B12 of the thermal insulation / cold insulation bag B2 has the above-mentioned eighth engaging protrusion 444, and in the closed state, the eighth engaging protrusion 444 may be in close contact with or abut against the fourth wall 240' from the X' direction side (see FIG. 4B). Alternatively, the eighth wall 440 may be configured so that the eighth engaging protrusion 444 and the eighth engaging recess 445 are omitted (not shown).

[0274] The heat and cold insulation bag B2 as described above has the following technical features and effects (1) to (6).

[0275] (1) Technical features and effects The first surface 213a of the first core material 213 comes into surface contact with the first outer cover material 211 either directly or indirectly via a first separate member, causing the first outer cover material 211 to flex in accordance with the shape of the first engaging recessed portion 213a1 and / or the first engaging protrusion 213a2 of the first core material 213. Therefore, even if the first outer cover material 211 and the first inner cover material 212 of the first wall portion 210 are made of a flexible material, the first engaging recessed portion 213a1 and / or the first engaging protrusion 213a2 of the first core material 213 can be exposed to the first outer cover material 211. In this way, a novel thermal insulation / cold insulation bag B2 was obtained.

[0276] (2) Technical features and effects The fifth engagement protrusion 414 of the fifth wall portion 410 fits into the first engagement recess 213a1 of the first wall portion 210 from the Z direction side, and / or the first engagement protrusion 213a2 of the first wall portion 210 fits into the fifth engagement recess 415 of the fifth wall portion 410 from the Z' direction side. This makes it easy to attach and detach the lid B12 to and from the main body B11', and as a result, makes it easy to open and close the lid B12.

[0277] (3) Technical features and effects In the closed state, when the fifth engagement protrusion 414 is in close contact with the bottom surface of the first engagement recess 213a1 and / or the first engagement protrusion 213a2 is in close contact with the bottom surface of the fifth engagement recess 415, the airtightness between the lid B12 and the main body B11' in the closed state is improved.

[0278] (4) Technical features and effects When the first core 213 has the configuration (1) above, the first core 213 is not built into the second portion of the first wall portion 210, and the second wall portion 220', the third wall portion 230', and the fourth wall portion 240' do not have the second core 223, the third core 233, and the fourth core 243 built into them. This reduces the cost of the thermal insulation / cooler bag B2. Moreover, the second portion of the first wall portion 210, the second wall portion 220', the third wall portion 230', and the fourth wall portion 240' are made of a flexible material, as described above. Therefore, when a user abuts against the second portion, second wall portion 220', third wall portion 230', and fourth wall portion 240' of the first wall portion 210, the second portion, second wall portion 220', third wall portion 230', and fourth wall portion 240' of the first wall portion 210 feel soft against the user. Furthermore, contents having a dimension in the Y-Y' direction slightly larger than the dimension in the Y-Y' direction between the second portion of the first wall portion 210 and the second wall portion 220' can be accommodated in the main body B11'. This is because the second portion of the first wall portion 210 and the second wall portion 220' are flexible even when the contents abut against them. Similarly, contents having a dimension in the X-X' direction slightly larger than the dimension in the X-X' direction between the third wall portion 230' and the fourth wall portion 240' can be accommodated in the main body B11'. This is because the third wall portion 230' and the fourth wall portion 240' are flexible even if the contents hit the third wall portion 230' and the fourth wall portion 240'.

[0279] (5) Technical features and effects When the first insulating layer 214 has the configuration (1-1-2), (1-1-3), (1-1-5), (1-1-6) or (1-1-8) above and a gap is formed between the first part 214a of the first insulating layer 214 and the second surface 213b of the first core material 213, or when the first insulating layer 214 has the configuration (1-1-1), (1-1-4) or (1-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2141 according to the shape of the recess 213b2 and / or recess 213b3 and at least one second insulating sheet 2141, the gap functions as air insulation.

[0280] (6) Technical features and effects When the first core 213 has the configuration (1) above, the first core 213 is not built into the second portion of the first wall portion 210, and the second wall portion 220′, the third wall portion 230′, and the fourth wall portion 240′ do not have the second core 223, the third core 233, and the fourth core 243 built into them. Therefore, it is possible to configure the second portion of the first wall portion 210 to be valley-foldable in the Y′ direction by the first valley fold, the second portion of the second wall portion 220′ to be valley-foldable in the Y direction by the second valley fold line, the second portion of the third wall portion 230′ to be valley-foldable in the X′ direction by the third valley fold line, and the second portion of the fourth wall portion 240′ to be valley-foldable in the X direction by the fourth valley fold line. In this case, the first and second valley fold lines are provided in the second portion of the first wall portion 210 and the second portion of the second wall portion 220′ and extend in the X-X′ direction. The third and fourth valley fold lines are provided on a second portion of the third wall portion 230' and a second portion of the fourth wall portion 240' and extend in the Y-Y' direction. Alternatively, the third wall portion 230' can be valley-folded in the X' direction along the third valley fold line, the fourth wall portion 240' can be valley-folded in the X direction along the fourth valley fold line, and the bottom portion 100 can be valley-folded in the Z direction along a valley fold line. In this case, the third and fourth valley fold lines are provided on the third wall portion 230' and the fourth wall portion 240' and extend in the Z-Z' direction, and the valley fold line on the bottom portion 100 is provided on the bottom portion 100 and extends in the X-X' direction. [Example]

[0281] Hereinafter, a thermal insulation bag B3 according to a third embodiment of the present invention and several other embodiments including design variations thereof will be described with reference to Figures 5A and 5B. Figures 5A and 5B show the thermal insulation bag B3 according to the third embodiment. In Figure 5A, the Z-Z' direction and the Y-Y' direction are shown in the same manner as in Figure 1D, and in Figure 5B, the Z-Z' direction and the X-X' direction are shown in the same manner as in Figure 1E.

[0282] The thermal insulated / cold bag B3 has the same configuration as the thermal insulated / cold bag B1, except that the configurations of the third wall portion 230' and the fourth wall portion 240' of the side wall 200'' of the main body B11'' are different from the configurations of the third wall portion 230 and the fourth wall portion 240 of the side wall 200 of the main body B11 of the thermal insulated / cold bag B1. Only the differences will be described in detail below, and any explanation of the thermal insulated / cold bag B3 that overlaps with the explanation of the thermal insulated / cold bag B1 will be omitted.

[0283] The third wall 230' of the thermal insulated cooler bag B3 has the same configuration as the third wall 230' of the thermal insulated cooler bag B2. The fourth wall 240' of the thermal insulated cooler bag B3 has the same configuration as the fourth wall 240' of the thermal insulated cooler bag B2.

[0284] The seventh wall 430 of the lid B12 of the thermal insulation / cold insulation bag B3 has a seventh engaging protrusion 434, and in the closed state, the seventh engaging protrusion 434 may be in close contact with or abut against the third wall 230' from the X direction side (see FIG. 5A). Alternatively, the seventh wall 430 may be configured so that the seventh engaging protrusion 434 and the seventh engaging recess 435 are omitted (not shown).

[0285] The eighth wall 440 of the lid B12 of the thermal insulation / cold insulation bag B3 has an eighth engaging protrusion 444, and in the closed state, the eighth engaging protrusion 444 may be in close contact with or abut against the fourth wall 240' from the X' direction side (see FIG. 5B). Alternatively, the eighth wall 440 may be configured so that the eighth engaging protrusion 444 and the eighth engaging recess 445 are omitted (not shown).

[0286] The heat and cold insulation bag B3 as described above has the following technical features and effects (1) to (6).

[0287] (1) Technical features and effects The first surface 213a of the first core material 213 comes into surface contact with the first outer covering material 211 directly or indirectly via a first separate member, causing the first outer covering material 211 to flex in accordance with the shape of the first engaging recess 213a1 and / or the first engaging protrusion 213a2 of the first core material 213. Therefore, even if the first outer covering material 211 and the first inner covering material 212 of the first wall portion 210 are made of a flexible material, the first engaging recess 213a1 and / or the first engaging protrusion 213a2 of the first core material 213 can be exposed on the first outer covering material 211. Similarly, the first surface 223a of the second core 223 comes into surface contact with the second outer cover material 221 directly or indirectly via a second separate member, thereby exposing the second engaging recessed portion 223a1 and / or the second engaging protruding portion 223a2 of the second core 223 to the second outer cover material 221. In this way, a novel thermal insulation / cold insulation bag B3 was obtained.

[0288] (2) Technical features and effects The fifth engagement protrusion 414 of the fifth wall portion 410 fits into the first engagement recess 213a1 of the first wall portion 210 from the Z direction side, and / or the first engagement protrusion 213a2 of the first wall portion 210 fits into the fifth engagement recess 415 of the fifth wall portion 410 from the Z' direction side. The sixth engagement protrusion 424 of the sixth wall portion 420 fits into the second engagement recess 223a1 of the second wall portion 220 from the Z direction side, and / or the second engagement protrusion 223a2 of the second wall portion 220 fits into the sixth engagement recess 425 of the sixth wall portion 420 from the Z' direction side. This makes it easy to attach and detach the lid B12 to and from the main body B11'', and as a result, makes it easy to open and close the lid B12.

[0289] (3) Technical features and effects In the closed state, when the fifth engagement protrusion 414 is in close contact with the bottom surface of the first engagement recess 213a1, and / or the first engagement protrusion 213a2 is in close contact with the bottom surface of the fifth engagement recess 415, and the sixth engagement protrusion 424 is in close contact with the bottom surface of the second engagement recess 223a1, and / or the second engagement protrusion 223a2 is in close contact with the bottom surface of the sixth engagement recess 425, the airtightness between the lid B12 and the main body B11'' in the closed state is improved.

[0290] (4) Technical features and effects When the first core 213 has the configuration (1) above and the second core 223 has the configuration (3) above, the first core 213 and the second core 223 are not built into the second portion of the first wall 210, the second portion of the second wall 220, and the second portion of the third wall 230, and the third core 233 and the fourth core 243 are not built into the third wall 230' and the fourth wall 240'. This reduces the cost of the thermal insulation / cooler bag B3. Moreover, the second portion of the first wall 210, the second portion of the second wall 220, the third wall 230', and the fourth wall 240' are made of a flexible material, as described above. Therefore, when a user comes into contact with the second portion of the first wall portion 210, the second portion of the second wall portion 220, the third wall portion 230′, and the fourth wall portion 240′, the second portion of the first wall portion 210, the second portion of the second wall portion 220, the third wall portion 230′, and the fourth wall portion 240′ feel soft against the user. Furthermore, contents having a dimension in the Y-Y′ direction that is slightly larger than the dimension in the Y-Y′ direction between the second portion of the first wall portion 210 and the second portion of the second wall portion 220 can be accommodated in the main body B11′. This is because the second portion of the first wall portion 210 and the second portion of the second wall portion 220 are flexible even when the contents come into contact with the second portion of the first wall portion 210 and the second portion of the second wall portion 220. Similarly, contents having dimensions in the X-X' direction that are slightly larger than the dimensions in the X-X' direction of the third wall portion 230' and the fourth wall portion 240' can be accommodated in the main body B11' because the third wall portion 230' and the fourth wall portion 240' are flexible even if the contents hit the third wall portion 230' and the fourth wall portion 240'.

[0291] (5) Technical features and effects When the first insulating layer 214 has the configuration (1-1-2), (1-1-3), (1-1-5), (1-1-6) or (1-1-8) above and a gap is formed between the first part 214a of the first insulating layer 214 and the second surface 213b of the first core material 213, or when the first insulating layer 214 has the configuration (1-1-1), (1-1-4) or (1-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2141 according to the shape of the recess 213b2 and / or recess 213b3 and at least one second insulating sheet 2141, the gap functions as air insulation. When the second insulating layer 224 has the configuration (3-1-2), (3-1-3), (3-1-5), (3-1-6) or (3-1-8) above and a gap is formed between the first part 224a of the second insulating layer 224 and the second surface 223b of the second core material 223, or when the second insulating layer 224 has the configuration (3-1-1), (3-1-4) or (3-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2241 according to the shape of the recess 223b2 and / or recess 223b3 and at least one second insulating sheet 2241, the gap functions as air insulation.

[0292] (6) Technical features and effects When first core 213 has the configuration (1) above and second core 223 has the configuration (3) above, first core 213 and second core 223 are not built into the second portion of first wall portion 210, the second portion of second wall portion 220, and the second portion of third wall portion 230, and third core 233 and fourth core 243 are not built into third wall portion 230' and fourth wall portion 240'. Therefore, it is possible to configure such that the second portion of first wall portion 210 can be valley-folded in the Y' direction by the first valley fold, the second portion of second wall portion 220 can be valley-folded in the Y direction by the second valley fold line, the second portion of third wall portion 230' can be valley-folded in the X' direction by the third valley fold line, and the second portion of fourth wall portion 240' can be valley-folded in the X direction by the fourth valley fold line. In this case, the first and second valley fold lines are provided on the second portion of the first wall portion 210 and the second portion of the second wall portion 220, and extend in the X-X' direction. The third and fourth valley fold lines are provided on the second portion of the third wall portion 230' and the second portion of the fourth wall portion 240', and extend in the Y-Y' direction. Alternatively, the third wall portion 230' can be valley-folded in the X' direction along the third valley fold line, the fourth wall portion 240' can be valley-folded in the X-direction along the fourth valley fold line, and the bottom portion 100 can be valley-folded in the Z-direction along the valley fold line. In this case, the third and fourth valley fold lines are provided on the third wall portion 230' and the fourth wall portion 240' and extend in the Z-Z' direction, and the valley fold line of the bottom portion 100 is provided on the bottom portion 100 and extends in the X-X' direction. [Example]

[0293] Hereinafter, a thermal insulation / cold bag B4 according to a fourth embodiment of the present invention and several other embodiments including its design variations will be described with reference to Figures 6A and 6B. Figures 6A and 6B show the thermal insulation / cold bag B4 of the fourth embodiment. In Figure 6A, the Z-Z' direction and the Y-Y' direction are shown in the same manner as in Figure 1D, and in Figure 6B, the Z-Z' direction and the X-X' direction are shown in the same manner as in Figure 1E.

[0294] The thermal insulated / cold bag B4 has the same configuration as the thermal insulated / cold bag B1, except that the configuration of the second wall portion 220' of the side wall 200''' of the main body B11''' is different from the configuration of the second wall portion 220 of the side wall 200 of the main body B11 of the thermal insulated / cold bag B1. Only the differences will be described in detail below, and any explanation of the thermal insulated / cold bag B4 that overlaps with the explanation of the thermal insulated / cold bag B1 will be omitted.

[0295] The second wall portion 220' of the thermal / cold insulation bag B4 has the same configuration as the second wall portion 220' of the thermal / cold insulation bag B2.

[0296] The sixth wall 420 of the lid B12 of the thermal insulation / cold insulation bag B2 has a sixth engaging protrusion 424, and in the closed state, the sixth engaging protrusion 424 may be in close contact with or abut against the second wall 220' from the Y' direction side (see FIG. 6A). Alternatively, the sixth wall 420 may be configured so that the sixth engaging protrusion 424 and the sixth engaging recess 425 are omitted (not shown).

[0297] The heat and cold insulation bag B4 as described above has the following technical features and effects (1) to (6).

[0298] (1) Technical features and effects The first surface 213a of the first core material 213 comes into surface contact with the first outer covering material 211 directly or indirectly via a first separate member, causing the first outer covering material 211 to flex in accordance with the shape of the first engaging recess 213a1 and / or the first engaging protrusion 213a2 of the first core material 213. Therefore, even if the first outer covering material 211 and the first inner covering material 212 of the first wall portion 210 are made of a flexible material, the first engaging recess 213a1 and / or the first engaging protrusion 213a2 of the first core material 213 can be exposed on the first outer covering material 211. Similarly, the first surface 233a of the third core 233 comes into surface contact with the third outer cover material 231 either directly or indirectly via a third separate member, thereby exposing the third engaging recess 233a1 and / or the third engaging protrusion 233a2 of the third core 233 to the third outer cover material 231, and the first surface 243a of the fourth core 243 comes into surface contact with the fourth outer cover material 241 either directly or indirectly via a fourth separate member, thereby exposing the fourth engaging recess 243a1 and / or the fourth engaging protrusion 243a2 of the fourth core 243 to the fourth outer cover material 241. In this way, a novel thermal insulation / cold insulation bag B1 was obtained.

[0299] (2) Technical features and effects The fifth engagement protrusion 414 of the fifth wall portion 410 fits into the first engagement recess 213a1 of the first wall portion 210 from the Z direction side, and / or the first engagement protrusion 213a2 of the first wall portion 210 fits into the fifth engagement recess 415 of the fifth wall portion 410 from the Z' direction side. The seventh engagement protrusion 434 of the seventh wall portion 430 fits into the third engagement recess 233a1 of the third wall portion 230 from the Z direction side, and / or the third engagement protrusion 233a2 of the third wall portion 230 fits into the seventh engagement recess 435 of the seventh wall portion 430 from the Z' direction side. The eighth engagement protrusion 444 of the eighth wall portion 440 fits into the fourth engagement recess 243a1 of the fourth wall portion 240 from the Z direction side, and / or the fourth engagement protrusion 243a2 of the fourth wall portion 240 fits into the eighth engagement recess 445 of the eighth wall portion 440 from the Z' direction side. This makes it easy to attach and detach the lid B12 to and from the main body B11''', and as a result, makes it easy to open and close the lid B12.

[0300] (3) Technical features and effects In the closed state, when the fifth engagement protrusion 414 is in close contact with the bottom surface of the first engagement recess 213a1, and / or the first engagement protrusion 213a2 is in close contact with the bottom surface of the fifth engagement recess 415, the seventh engagement protrusion 434 is in close contact with the bottom surface of the third engagement recess 233a1, and / or the third engagement protrusion 233a2 is in close contact with the bottom surface of the seventh engagement recess 435, and the eighth engagement protrusion 444 is in close contact with the bottom surface of the fourth engagement recess 243a1, and / or the fourth engagement protrusion 243a2 is in close contact with the bottom surface of the eighth engagement recess 445, the airtightness between the lid B12 and the main body B11''' in the closed state is improved.

[0301] (4) Technical features and effects When the first core 213 has the configuration (1) above, the third core 233 has the configuration (5) above, and the fourth core 243 has the configuration (7) above, the first core 213, the third core 233, and the fourth core 243 are not built into the second portion of the first wall portion 210, the second portion of the third wall portion 230, and the second portion of the fourth wall portion 240, and the second core 223 is not built into the second wall portion 220′. This reduces the cost of the thermal insulation / cooler bag B1. Moreover, the second portion of the first wall portion 210, the second wall portion 220′, the second portion of the third wall portion 230, and the second portion of the fourth wall portion 240 are made of a flexible material, as described above. Therefore, when a user comes into contact with the second portion of the first wall portion 210, the second wall portion 220', the second portion of the third wall portion 230, and the second portion of the fourth wall portion 240, the second portion of the first wall portion 210, the second wall portion 220', the second portion of the third wall portion 230, and the second portion of the fourth wall portion 240 feel soft against the user. Furthermore, contents having a dimension in the Y-Y' direction that is slightly larger than the dimension in the Y-Y' direction between the second portion of the first wall portion 210 and the second wall portion 220' can be accommodated in the main body B11'''. This is because the second portion of the first wall portion 210 and the second wall portion 220' are flexible even when the contents come into contact with the second portion of the first wall portion 210 and the second wall portion 220'. Similarly, contents having a dimension in the X-X' direction that is slightly larger than the dimension in the X-X' direction of the second portion of the third wall portion 230 and the second portion of the fourth wall portion 240 can be stored in the main body B11'''. This is because the second portion of the third wall portion 230 and the second portion of the fourth wall portion 240 are flexible even if the contents hit the second portion of the third wall portion 230 and the second portion of the fourth wall portion 240.

[0302] (5) Technical features and effects When the first insulating layer 214 has the configuration (1-1-2), (1-1-3), (1-1-5), (1-1-6) or (1-1-8) above and a gap is formed between the first part 214a of the first insulating layer 214 and the second surface 213b of the first core material 213, or when the first insulating layer 214 has the configuration (1-1-1), (1-1-4) or (1-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2141 according to the shape of the recess 213b2 and / or recess 213b3 and at least one second insulating sheet 2141, the gap functions as air insulation. When the third insulating layer 234 has the configuration (5-1-2), (5-1-3), (5-1-5), (5-1-6) or (5-1-8) above and a gap is formed between the first part 234a of the third insulating layer 234 and the second surface 233b of the third core material 233, or when the third insulating layer 234 has the configuration (5-1-1), (5-1-4) or (5-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2341 according to the shape of the recess 233b2 and / or recess 233b3 and at least one second insulating sheet 2341, the gap functions as air insulation. When the fourth insulating layer 244 has the configuration (7-1-2), (7-1-3), (7-1-5), (7-1-6) or (7-1-8) above and a gap is formed between the first part 244a of the fourth insulating layer 244 and the second surface 243b of the fourth core material 243, or when the fourth insulating layer 244 has the configuration (7-1-1), (7-1-4) or (7-1-9) above and a gap is formed between the flexible part of the first part of at least one first insulating sheet 2441 according to the shape of the recess 243b2 and / or recess 243b3 and at least one second insulating sheet 2441, the gap functions as air insulation.

[0303] (6) Technical features and effects When the first core material 213 has the configuration (1) above, the third core material 233 has the configuration (5) above, and the fourth core material 243 has the configuration (7) above, the second part of the first wall portion 210, the second part of the second wall portion 220', the second part of the third wall portion 230, and the second part of the fourth wall portion 240 can be configured to be valley-folded or mountain-folded.

[0304] The above-described heat / cold insulation bag is not limited to the above-described embodiment, and can be arbitrarily modified within the scope of the claims.

[0305] The second core 223 may be configured without the second engaging recess 223a1 and / or the second engaging protrusion 223a2. In this case, the sixth wall 420 of the lid B12 of the heat / cold storage bag B1 has the sixth engaging protrusion 424, and in the closed state, the sixth engaging protrusion 424 may be in close contact with or abut against the second wall 220 from the Y' direction side, or the sixth wall 420 may be configured without the sixth engaging protrusion 424 and the sixth engaging recess 425.

[0306] The third core 233 may be configured without the third engaging recess 233a1 and / or the third engaging protrusion 233a2. In this case, the seventh wall 430 of the lid B12 of the thermal insulation / cold insulation bag B1 has a seventh engaging protrusion 434, and in the closed state, the seventh engaging protrusion 434 may be in close contact with or abut against the third wall 230 from the X-direction side, or the seventh wall 430 may be configured without the seventh engaging protrusion 434 and the seventh engaging recess 435.

[0307] The fourth core 243 may be configured without the fourth engaging recess 243a1 and / or the fourth engaging protrusion 243a2. In this case, the eighth wall 440 of the lid B12 of the thermal insulation / cold insulation bag B1 has an eighth engaging protrusion 444, and in the closed state, the eighth engaging protrusion 444 may be in close contact with or abut against the fourth wall 240 from the X' direction side, or the eighth wall 440 may be configured without the eighth engaging protrusion 444 and the eighth engaging recess 445.

[0308] It is possible for the main body B11 of the above-described thermal insulation / cold bag B1 to have a side wall 400 (the other side wall) instead of the side wall 200, and for the lid B12 of the above-described thermal insulation / cold bag B1 to have a side wall 200 (one side wall) instead of the side wall 400. The side wall 400 of the main body B11 is configured such that the above-described fifth wall portion 410 is inverted in the Y-Y' direction, the above-described sixth wall portion 420 is inverted in the Y-Y' direction, the above-described seventh wall portion 430 is inverted in the X-X' direction, and the above-described eighth wall portion 440 is inverted in the X-X' direction. Similarly, the side wall 200 of the lid B12 has a configuration in which the above-mentioned first wall portion 210 is inverted in the Y-Y' direction, the above-mentioned second wall portion 220 is inverted in the Y-Y' direction, the above-mentioned third wall portion 230 is inverted in the X-X' direction, and the above-mentioned fourth wall portion 240 is inverted in the X-X' direction.

[0309] It is possible for the main body B11' of the above-described thermal insulation / cold bag B2 to have a side wall 400 (the other side wall) instead of the side wall 200', and for the lid B12 of the above-described thermal insulation / cold bag B2 to have a side wall 200' (one side wall) instead of the side wall 400. The side wall 400 of the main body B11' has a configuration in which the above-described fifth wall portion 410 is inverted in the Y-Y' direction, the above-described sixth wall portion 420 is inverted in the Y-Y' direction, the above-described seventh wall portion 430 is inverted in the X-X' direction, and the above-described eighth wall portion 440 is inverted in the X-X' direction. Similarly, the side wall 200' of the lid B12 has a configuration in which the above-mentioned first wall portion 210 is inverted in the Y-Y' direction, the above-mentioned second wall portion 220' is inverted in the Y-Y' direction, the above-mentioned third wall portion 230' is inverted in the X-X' direction, and the above-mentioned fourth wall portion 240' is inverted in the X-X' direction.

[0310] The main body B11" of the above-described thermal insulated cooler bag B3 may have a side wall 400 (the other side wall) instead of the side wall 200", and the lid B12 of the above-described thermal insulated cooler bag B3 may have a side wall 200" (one side wall) instead of the side wall 400. The side wall 400 of the main body B11" is configured such that the above-described fifth wall portion 410 is inverted in the Y-Y' direction, the above-described sixth wall portion 420 is inverted in the Y-Y' direction, the above-described seventh wall portion 430 is inverted in the X-X' direction, and the above-described eighth wall portion 440 is inverted in the X-X' direction. Similarly, the side wall 200'' of the lid B12 has a configuration in which the above-mentioned first wall portion 210 is inverted in the Y-Y' direction, the above-mentioned second wall portion 220 is inverted in the Y-Y' direction, the above-mentioned third wall portion 230' is inverted in the X-X' direction, and the above-mentioned fourth wall portion 240' is inverted in the X-X' direction.

[0311] The main body B11''' of the above-described thermal insulated cooler bag B4 may have a side wall 400 (the other side wall) instead of the side wall 200''', and the lid B12 of the above-described thermal insulated cooler bag B4 may have a side wall 200''' (one side wall) instead of the side wall 400. The side wall 400 of the main body B11''' has a configuration in which the above-described fifth wall portion 410 is inverted in the Y-Y' direction, the above-described sixth wall portion 420 is inverted in the Y-Y' direction, the above-described seventh wall portion 430 is inverted in the X-X' direction, and the above-described eighth wall portion 440 is inverted in the X-X' direction. Similarly, the side wall 200'' of the lid B12 has a configuration in which the first wall portion 210 described above is inverted in the Y-Y' direction, the second wall portion 220' described above is inverted in the Y-Y' direction, the third wall portion 230 described above is inverted in the X-X' direction, and the fourth wall portion 240 described above is inverted in the X-X' direction.

[0312] The lid B12 described above can also be configured to be rotatably connected to the main body B11, main body B11', main body B11'', or main body B11''', (not shown). In this case, the second engagement portion 250 and the fourth engagement portion 500 are omitted. Instead, a tongue portion 510 is fixed to the sixth wall portion 420 of the lid B12 and hangs down in the Z' direction, and this tongue portion 510 is fixed to the second wall portion 220 of the main body B11, the second wall portion 220' of the main body B11', the second wall portion 220 of the main body B11'', or the second wall portion 220' of the main body B11'''. Alternatively, a tongue 510 is fixed to the inverted second wall 220 or 220' of the lid B12 and hangs down in the Z' direction, and this tongue 510 is fixed to the inverted sixth wall 420 of the main body B11, main body B11', main body B11'', or main body B11'''. The tongue 510 allows the lid B12 to rotate between a closed state and an open state. Alternatively, the sixth wall portion 420 of the lid B12 may be omitted, and the Y'-direction end of the ceiling portion 300 of the lid B12 may be rotatably connected to the Z-direction end of the second wall portion 220 of the main body B11, the second wall portion 220' of the main body B11', the second wall portion 220 of the main body B11'', or the second wall portion 220' of the main body B11''', or the inverted second wall portion 220 or second wall portion 220' of the lid B12 may be omitted, and the Y'-direction end of the ceiling portion 300 of the lid B12 may be rotatably connected to the Z-direction end of the inverted sixth wall portion 420 of the main body B11, main body B11', main body B11'', or main body B11'''. In either case, the lid B12 is attached to or detached from the main body B11, B11', B11'', or main body B11''', as described above, by rotating the lid B12 between the closed state and the open state. Note that if the sixth wall portion 420 of the lid B12 or the inverted second wall portion 220 or second wall portion 220' of the lid B12 is omitted, the side wall of the lid B12 will be approximately U-shaped or C-shaped when viewed from the Z direction side.

[0313] The bottom 100 described above may be made of any material. For example, the bottom 100 may have an outer covering material on the Z' direction side, an outer covering material on the Z direction side, and an insulating layer between them. The Z' direction side outer covering material and the Z direction side outer covering may each be made of a flexible sheet, similar to the first outer covering material 211, etc. The insulating layer may have a configuration similar to the first insulating layer 214, etc. However, if at least one insulating layer has multiple insulating sheets, the multiple insulating sheets may be stacked in the Z-Z' direction. Alternatively, the bottom 100 may be made of molded resin, etc. Note that if the main body B11, B11', B11'', or B11''' described above has a bottom 100 and a side wall 400, the bottom 100 and the side wall 400 may be made of molded resin, etc.

[0314] The above-mentioned ceiling portion 300 may be made of any material. For example, the ceiling portion 300 may be made of a ceiling sheet similar to the bottom sheet of the bottom portion 100, or the ceiling portion 300 may be made of molded resin or the like. Note that, in the case where the above-mentioned lid B12 has the ceiling portion 300 and the side wall 400, the ceiling portion 300 and the side wall 400 may be made of molded resin or the like. [Explanation of symbols]

[0315] B1, B2, B3: Thermal insulation bag B11, B11', B11'', B11''': Main body 100: Bottom 200, 200', 200'', 200''': Side wall 210: 1st wall part 211: First outer covering material (first outer covering material) 211a: Part 1 211b: Part 2 212: First inner outer covering material (first second outer covering material) 212a: Part 1 212b: Part 2 213: First core material 213a: First surface 213a1: First engaging recess 213a2: First engaging protrusion 213a3: Protrusion 213b: Second surface 213b1: Protrusion 213b2: Recess 213b3: Recess 214: First heat insulation layer 214a: First part 214b: Second part 220, 220': Second wall part 221: Second outer covering material (Second first outer covering material) 221a: First part 221b: Second part 222: Second inner covering material (Second second outer covering material) 222a: First part 222b: Second part 223: Second core material 223a: First surface 223a1: Second engaging concave part 223a2: Second engaging convex part 223a3: Convex part 223b: Second surface 223b1: Convex part 223b2: Concave part 223b3: Concave part 224: Second heat insulation layer 224a: First part 224b: Second part 230, 230': Third wall part 231: Third outer covering material (Third first outer covering material) 231a: First part 231b: Second part 232: Third inner covering material (Third second outer covering material) 232a: First part 232b: Second part 233: Third core material 233a: First surface 233a1: Third engaging concave part 233a2: Third engaging convex part 233a3: Convex part 233b: Second surface 233b1: Convex part 233b2: Concave part 233b3: Concave part 234: Third heat insulation layer 234a: First part 234b: Second part 240, 240': Fourth wall part 241: Fourth outer covering material (Fourth first outer covering material) 241a: First part 241b: Second part 242: Fourth inner covering material (Fourth second outer covering material) 242a: First part 242b: Second part 243: Fourth core material 243a: First surface 243a1: Fourth engaging concave part 243a2: Fourth engaging convex part 243a3: Convex part 243b: Second surface 243b1: Convex part 243b2: Concave part 243b3: Concave part 244: Fourth heat insulation layer 244a: First part 244b: Second part 250: First engaging part, Second engaging part B12: Lid 300: Ceiling part 310: Outer covering material 320: Outer covering material 330: Core material 340: Heat insulating layer 341: Heat insulating sheet 350: Reinforcing plate 400: Side wall 410: Fifth wall portion 411: Fifth outer covering material 412: Fifth inner covering material 413: Fifth core material 414: Fifth engaging protrusion 415: Fifth engaging recess 420: Sixth wall portion 421: Sixth outer covering material 422: Sixth inner covering material 423: Sixth core material 424: Sixth engaging protrusion 425: Sixth engaging recess 430: Seventh wall portion 431: Seventh outer covering material 432: Seventh inner covering material 433: Seventh core material 434: Seventh engaging protrusion 435: Seventh engaging recess 440: Eighth wall portion 441: Eighth outer covering material 442: Eighth inner covering material 443: Eighth core material 444: Eighth engaging protrusion 445: Eighth engaging recess 500: Third engagement portion, fourth engagement portion 510: Tongue portion 520: Engagement portion main body

Claims

1. a substantially cylindrical main body having a bottom and an opening on one side in the first direction; It is equipped with a lid, The main body has a bottom and a generally cylindrical side wall extending from the bottom in one direction in the first direction, the lid has a ceiling portion and a side wall extending from the ceiling portion in the other direction in the first direction, and the side wall of the lid is disposed around the side wall of the main body in a closed state in which the lid covers the opening of the main body, one of the side wall of the main body and the side wall of the lid has a first wall portion on one side in a second direction substantially perpendicular to the first direction, and the other side wall has a fifth wall portion on one side in the second direction, The first wall portion has a first first outer covering material that is flexible and faces the fifth wall portion in the closed state, a first second outer covering material that is flexible on the opposite side thereof, and a first core material that is arranged between the first first outer covering material and the first second outer covering material, and the first core material has a first surface on the side of the first first outer covering material, and a first engaging recess and / or a first engaging protrusion is provided on the first surface of the first core material, and the first surface of the first core material directly or indirectly comes into surface contact with the first first outer covering material, thereby causing the first first outer covering material to flex according to the shape of the first engaging recess and / or the first engaging protrusion of the first core material, the fifth wall portion has a fifth engaging protrusion that is protruding toward the first wall portion in the closed state and / or a fifth engaging recess that is recessed on the opposite side to the first wall portion in the closed state, In the closed state, the fifth engaging protrusion of the fifth wall portion fits removably into the first engaging recess of the first wall portion in the first direction, and / or the first engaging protrusion of the first wall portion fits removably into the fifth engaging recess of the fifth wall portion in the first direction.

2. The thermal insulation / cooling bag according to claim 1, the first outer covering material has a first portion that is a part of the first outer covering material and a second portion that is a part of the first outer covering material that is separate from the first portion, the first second outer covering material has a first portion that is a part of the first second outer covering material and a second portion that is a portion of the first second outer covering material that is separate from the first portion, the first core material is disposed between the first portion of the first outer covering material and the first portion of the first second outer covering material, The first wall portion further has a first insulating layer having flexibility, and the first insulating layer is positioned at least between the second portion of the first outer covering material and the second portion of the first second outer covering material.

3. The thermal insulation / cooling bag according to claim 2, The first insulating layer has a first portion that is a part of the first insulating layer and a second portion that is a part of the first insulating layer that is separate from the first portion, the first portion of the first insulation layer is disposed between the first portion of the first first outer covering material and the first core material or between the first portion of the first second outer covering material and the first core material, An insulated / cold bag in which the second portion of the first insulating layer is arranged between the second portion of the first outer covering material and the second portion of the first second outer covering material.

4. The thermal insulation / cooling bag according to claim 3, The first core further has a second surface opposite to the first surface, a recess is provided on the second surface of the first core material, An insulated / cold bag in which the first portion of the first insulating layer is arranged with a gap between it and the bottom surface of the recess in the second surface of the first core material.

5. The thermal insulation / cooling bag according to claim 3, The first core further has a second surface opposite to the first surface, a recess is provided on the second surface of the first core material, the first insulation layer has a plurality of flexible insulation sheets, the plurality of insulation sheets having at least one first insulation sheet and at least one second insulation sheet; the first portion of the first insulation layer includes a first portion of the at least one first insulation sheet and a first portion of the at least one second insulation sheet; the second portion of the first insulation layer includes a second portion of the at least one first insulation sheet and a second portion of the at least one second insulation sheet; A thermal insulation / cooler bag in which the first portion of the at least one first insulating sheet is flexible according to the shape of the recess on the second surface of the first core material, and a gap is formed between the portion of the first portion of the at least one first insulating sheet that is flexible according to the shape of the recess on the second surface of the first core material and the at least one second insulating sheet.

6. The thermal insulation / cooling bag according to claim 1, the one side wall further includes a second wall portion on the other side in the second direction, the other side wall further includes a sixth wall portion on the other side in the second direction, The second wall portion has a second first outer covering material that is flexible and faces the sixth wall portion in the closed state, a second second outer covering material on the opposite side that is flexible, and a second core material arranged between the second first outer covering material and the second second outer covering material, the second core material having a first surface on the second first outer covering material side, a second engaging recess and / or a second engaging protrusion on the first surface of the second core material, and the first surface of the second core material directly or indirectly comes into surface contact with the second first outer covering material, thereby causing the second first outer covering material to flex according to the shape of the second engaging recess and / or the second engaging protrusion of the second core material, the sixth wall portion has a sixth engaging protrusion that is protruding toward the second wall portion in the closed state and / or a sixth engaging recess that is recessed on the opposite side to the second wall portion in the closed state, In the closed state, the sixth engaging protrusion of the sixth wall portion fits removably into the second engaging recess of the second wall portion in the first direction, and / or the second engaging protrusion of the second wall portion fits removably into the sixth engaging recess of the sixth wall portion in the first direction.

7. The thermal insulation / cooling bag according to claim 6, the second first outer covering material has a first portion that is a part of the second first outer covering material and a second portion that is a portion of the second first outer covering material that is separate from the first portion, the second outer covering material has a first portion that is a part of the second outer covering material and a second portion that is a part of the second outer covering material that is separate from the first portion, the second core material is disposed between the first portion of the second first outer covering material and the first portion of the second second outer covering material, The second wall portion further has a flexible second insulating layer, and the second insulating layer is positioned at least between the second portion of the second first outer covering material and the second portion of the second second outer covering material.

8. The thermal insulation / cooling bag according to claim 1 or 6, the one side wall further includes a third wall portion on one side in a third direction and a fourth wall portion on the other side in the third direction, the third direction being substantially perpendicular to the first direction and the second direction; The third wall portion has a third first outer covering material that is flexible, a third second outer covering material that is flexible, and a third core material arranged between the third first outer covering material and the third second outer covering material, the third core material having a first surface facing the third first outer covering material, a third engaging recess and / or a third engaging protrusion on the first surface of the third core material, and the first surface of the third core material directly or indirectly coming into surface contact with the third first outer covering material, thereby causing the third first outer covering material to flex according to the shape of the third engaging recess and / or the third engaging protrusion of the third core material, The fourth wall portion has a fourth first outer covering material that is flexible, a fourth second outer covering material that is flexible, and a fourth core material arranged between the fourth first outer covering material and the fourth second outer covering material, and the fourth core material has a first surface on the side of the fourth first outer covering material, and a fourth engaging recess and / or a fourth engaging protrusion is provided on the first surface of the fourth core material, and the first surface of the fourth core material is in direct or indirect surface contact with the fourth first outer covering material, thereby causing the fourth first outer covering material to flex according to the shape of the fourth engaging recess of the fourth core material and / or the fourth engaging protrusion of the fourth core material, the other side wall further includes a seventh wall portion on one side in the third direction and an eighth wall portion on the other side in the third direction, the seventh wall portion has a seventh engagement protrusion that is protruding toward the third wall portion in the closed state and / or a seventh engagement recess that is recessed on the opposite side to the third wall portion in the closed state, the eighth wall portion has an eighth engagement protrusion that is protruding toward the fourth wall portion in the closed state and / or an eighth engagement recess that is recessed on the opposite side to the fourth wall portion in the closed state, In the closed state, the seventh engaging protrusion of the seventh wall portion fits removably into the third engaging recess of the third wall portion in the first direction and the eighth engaging protrusion of the eighth wall portion fits removably into the fourth engaging recess of the fourth wall portion in the first direction, and / or the third engaging protrusion of the third wall portion fits removably into the seventh engaging recess of the seventh wall portion in the first direction and the fourth engaging protrusion of the fourth wall portion fits removably into the eighth engaging recess of the eighth wall portion in the first direction.

9. The thermal insulation / cooling bag according to claim 8, the third first outer covering material has a first portion that is a part of the third first outer covering material and a second portion that is a part of the third first outer covering material that is separate from the first portion, the third second outer covering material has a first portion that is a part of the third second outer covering material and a second portion that is a part of the third second outer covering material that is separate from the first portion, the third core material is disposed between the first portion of the third first outer covering material and the first portion of the third second outer covering material, The third wall portion further includes a flexible third insulating layer, and the third insulating layer is disposed at least between the second portion of the third first outer covering material and the second portion of the third second outer covering material; the fourth first outer covering material has a first portion that is a part of the fourth first outer covering material and a second portion that is a part of the fourth first outer covering material that is separate from the first portion, the fourth second outer covering material has a first portion that is a part of the fourth second outer covering material and a second portion that is a part of the fourth second outer covering material that is separate from the first portion, the fourth core material is disposed between the first portion of the fourth first outer covering material and the first portion of the fourth second outer covering material, The fourth wall portion further has a fourth insulating layer that is flexible, and the fourth insulating layer is positioned at least between the second portion of the fourth first outer covering material and the second portion of the fourth second outer covering material.

10. The thermal insulation / cooling bag according to claim 1, the one side wall further includes a second wall portion on the other side in the second direction, a third wall portion on one side in a third direction, and a fourth wall portion on the other side in the third direction, the third direction being substantially perpendicular to the first direction and the second direction; the second wall portion has a second first outer covering material having flexibility, a second second outer covering material on the opposite side thereof having flexibility, and a second core material disposed between the second first outer covering material and the second second outer covering material, the third wall portion has a third first outer covering material having flexibility, a third second outer covering material having flexibility, and a third core material disposed between the third first outer covering material and the third second outer covering material, the fourth wall portion has a fourth first outer covering material having flexibility, a fourth second outer covering material having flexibility, and a fourth core material disposed between the fourth first outer covering material and the fourth second outer covering material, the first first outer covering material, the third first outer covering material, the second first outer covering material, and the fourth first outer covering material are integrally connected or joined together to form a substantially cylindrical shape, An insulated / cold bag in which the first second outer covering material, the third second outer covering material, the second second outer covering material and the fourth second outer covering material are integrally connected or joined together to form an approximately cylindrical shape.

11. The thermal insulation / cooling bag according to claim 10, the second core material has a first surface on the side of the second first outer covering material, and a second engaging recess and / or a second engaging protrusion is provided on the first surface of the second core material, and the first surface of the second core material directly or indirectly contacts the second first outer covering material, thereby causing the second first outer covering material to flex in accordance with the shape of the second engaging recess and / or the second engaging protrusion of the second core material; the third core material has a first surface on the side of the third first outer covering material, and a third engaging recess and / or a third engaging protrusion is provided on the first surface of the third core material, and the first surface of the third core material directly or indirectly contacts the third first outer covering material, thereby causing the third first outer covering material to flex in accordance with the shape of the third engaging recess and / or the third engaging protrusion of the third core material, the fourth core material has a first surface facing the fourth first outer covering material, and a fourth engaging recess and / or a fourth engaging protrusion is provided on the first surface of the fourth core material, and the first surface of the fourth core material directly or indirectly contacts the fourth first outer covering material, thereby causing the fourth first outer covering material to flex in accordance with the shape of the fourth engaging recess and / or the fourth engaging protrusion of the fourth core material; the other side wall further includes a sixth wall portion on the other side in the second direction, a seventh wall portion on one side in the third direction, and an eighth wall portion on the other side in the third direction, the sixth wall portion has a sixth engaging protrusion that is protruding toward the second wall portion in the closed state and / or a sixth engaging recess that is recessed on the opposite side to the second wall portion in the closed state, the seventh wall portion has a seventh engagement protrusion that is protruding toward the third wall portion in the closed state and / or a seventh engagement recess that is recessed on the opposite side to the third wall portion in the closed state, the eighth wall portion has an eighth engagement protrusion that is protruding toward the fourth wall portion in the closed state and / or an eighth engagement recess that is recessed on the opposite side to the fourth wall portion in the closed state, In the closed state, the sixth engaging protrusion of the sixth wall portion is removably fitted into the second engaging recess of the second wall portion in the first direction, the seventh engaging protrusion of the seventh wall portion is removably fitted into the third engaging recess of the third wall portion in the first direction and the eighth engaging protrusion of the eighth wall portion is removably fitted into the fourth engaging recess of the fourth wall portion in the first direction, and / or the second engaging protrusion of the second wall portion is removably fitted into the sixth engaging recess of the sixth wall portion in the first direction, the third engaging protrusion of the third wall portion is removably fitted into the seventh engaging recess of the seventh wall portion in the first direction and the fourth engaging protrusion of the fourth wall portion is removably fitted into the eighth engaging recess of the eighth wall portion in the first direction.

12. The thermal insulation / cooling bag according to claim 11, the first engaging protrusion of the first core material, the third engaging protrusion of the third core material, the second engaging protrusion of the second core material, and the fourth engaging protrusion of the fourth core material form a substantially annular protrusion, An insulated / cold bag in which the first engaging recess of the first core material, the third engaging recess of the third core material, the second engaging recess of the second core material, and the fourth engaging recess of the fourth core material form an approximately annular recess.

13. The thermal insulation / cooling bag according to claim 10, 11 or 12, the side wall of the body is the one side wall, the first wall portion has a first portion that is a portion of the first wall portion in the first direction, and a second portion that is a portion of the first wall portion on one side or the other side of the first portion in the first direction, the first portion of the first wall portion includes a first portion that is a portion of the first first outer covering material in the first direction, a first portion that is a portion of the first second outer covering material in the first direction, and the first core material that is arranged between the first portion of the first first outer covering material and the first portion of the first second outer covering material, The second portion of the first wall portion has a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the first first outer covering material, a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the first second outer covering material, and at least a portion of a flexible first insulation layer that is arranged between the second portion of the first first outer covering material and the second portion of the first second outer covering material, the second wall portion has a first portion that is a portion of the second wall portion in the first direction, and a second portion that is a portion of the second wall portion on one side or the other side of the first portion in the first direction, the first portion of the second wall portion includes a first portion that is a portion of the second first outer covering material in the first direction, a first portion that is a portion of the second second outer covering material in the first direction, and the second core material that is arranged between the first portion of the second first outer covering material and the first portion of the second second outer covering material, The second portion of the second wall portion has a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the second first outer covering material, a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the second second outer covering material, and at least a portion of a flexible second insulating layer that is arranged between the second portion of the second first outer covering material and the second portion of the second second outer covering material, the third wall portion has a first portion that is a portion of the third wall portion in the first direction, and a second portion that is a portion of the third wall portion on one side or the other side of the first portion in the first direction, the first portion of the third wall portion includes a first portion that is a portion of the third first outer covering material in the first direction, a first portion that is a portion of the third second outer covering material in the first direction, and the third core material that is arranged between the first portion of the third first outer covering material and the first portion of the third second outer covering material, The second portion of the third wall portion has a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the third first outer covering material, a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the third second outer covering material, and at least a portion of a flexible third insulation layer that is arranged between the second portion of the third first outer covering material and the second portion of the third second outer covering material, the fourth wall portion has a first portion that is a portion of the fourth wall portion in the first direction, and a second portion that is a portion of the fourth wall portion on one side or the other side of the first portion in the first direction, the first portion of the fourth wall portion includes a first portion that is a portion of the fourth first outer covering material in the first direction, a first portion that is a portion of the fourth second outer covering material in the first direction, and the fourth core material that is arranged between the first portion of the fourth first outer covering material and the first portion of the fourth second outer covering material, The second portion of the fourth wall portion has a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the fourth first outer covering material, a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the fourth second outer covering material, and at least a portion of a flexible fourth insulation layer that is arranged between the second portion of the fourth first outer covering material and the second portion of the fourth second outer covering material, The second portion of the first wall portion can be valley-folded toward the other side in the second direction, The second portion of the second wall portion is capable of being valley-folded toward one side in the second direction, the second portion of the third wall portion is capable of being valley-folded toward the other side in the third direction, The thermal insulation / cooling bag has a second portion of the fourth wall portion that can be valley-folded to one side in the third direction.

14. The thermal insulation / cooling bag according to claim 11 or 12, the fifth engaging protrusion, the sixth engaging protrusion, the seventh engaging protrusion, and the eighth engaging protrusion are integrally connected to form a substantially annular engaging protrusion, The fifth engaging recess, the sixth engaging recess, the seventh engaging recess, and the eighth engaging recess are integrally connected to form a substantially annular engaging recess.

15. The thermal insulation / cooling bag according to claim 1, the one side wall further includes a second wall portion on the other side in the second direction, a third wall portion on one side in a third direction, and a fourth wall portion on the other side in the third direction, the third direction being substantially perpendicular to the first direction and the second direction, the second wall portion has a second first outer covering material having flexibility and a second second outer covering material having flexibility, the third wall portion has a third first outer covering material having flexibility and a third second outer covering material having flexibility, the fourth wall portion has a fourth first outer covering material having flexibility and a fourth second outer covering material having flexibility, the first first outer covering material, the third first outer covering material, the second first outer covering material, and the fourth first outer covering material are integrally connected or joined together to form a substantially cylindrical shape, An insulated / cold bag in which the first second outer covering material, the third second outer covering material, the second second outer covering material and the fourth second outer covering material are integrally connected or joined together to form an approximately cylindrical shape.

16. The thermal insulation / cooling bag according to claim 15, The first wall portion further includes a first insulating layer having flexibility, and the first insulating layer is disposed between the first first outer covering material and the first second outer covering material, the second wall portion further includes a flexible second insulating layer, the second insulating layer being disposed between the second first outer covering material and the second second outer covering material; the third wall portion further includes a flexible third insulating layer, the third insulating layer being disposed between the third first outer covering material and the third second outer covering material; The fourth wall portion further has a fourth insulating layer having flexibility, and the fourth insulating layer is arranged between the fourth first outer covering material and the fourth second outer covering material.

17. The thermal insulation / cooling bag according to claim 16, the side wall of the body is the one side wall, the first wall portion has a first portion that is a portion of the first wall portion in the first direction, and a second portion that is a portion of the first wall portion on one side or the other side of the first portion in the first direction, the first portion of the first wall portion includes a first portion that is a portion of the first first outer covering material in the first direction, a first portion that is a portion of the first second outer covering material in the first direction, and the first core material that is arranged between the first portion of the first first outer covering material and the first portion of the first second outer covering material, The second portion of the first wall portion has a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the first first outer covering material, a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the first second outer covering material, and at least a portion of the first insulation layer arranged between the second portion of the first first outer covering material and the second portion of the first second outer covering material, the second wall portion has a first portion that is a portion of the second wall portion in the first direction, and a second portion that is a portion of the second wall portion on one side or the other side of the first portion in the first direction, the first portion of the second wall portion has a first portion that is a portion of the second first outer covering material in the first direction, and a first portion that is a portion of the second second outer covering material in the first direction, The second portion of the second wall portion has a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the second first outer covering material, a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the second second outer covering material, and at least a portion of the second insulation layer arranged between the second portion of the second first outer covering material and the second portion of the second second outer covering material, the third wall portion has a first portion that is a portion of the third wall portion in the first direction, and a second portion that is a portion of the third wall portion on one side or the other side of the first portion in the first direction, the first portion of the third wall portion has a first portion that is a portion of the third first outer covering material in the first direction, and a first portion that is a portion of the third second outer covering material in the first direction, The second portion of the third wall portion has a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the third first outer covering material, a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the third second outer covering material, and at least a portion of the third insulation layer arranged between the second portion of the third first outer covering material and the second portion of the third second outer covering material, the fourth wall portion has a first portion that is a portion of the fourth wall portion in the first direction, and a second portion that is a portion of the fourth wall portion on one side or the other side of the first portion in the first direction, the first portion of the fourth wall portion has a first portion that is a portion of the fourth first outer covering material in the first direction and a first portion that is a portion of the fourth second outer covering material in the first direction, The second portion of the fourth wall portion has a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the fourth first outer covering material, a second portion that is a portion on the other side or one side in the first direction relative to the first portion of the fourth second outer covering material, and at least a portion of the fourth insulation layer arranged between the second portion of the fourth first outer covering material and the second portion of the fourth second outer covering material, The second portion of the first wall portion can be valley-folded toward the other side in the second direction, The second portion of the second wall portion is capable of being valley-folded toward one side in the second direction, the second portion of the third wall portion is capable of being valley-folded toward the other side in the third direction, The thermal insulation / cooling bag has a second portion of the fourth wall portion that can be valley-folded to one side in the third direction.

18. The thermal insulation / cooling bag according to claim 15 or 16, the side wall of the body is the one side wall, the third wall portion is capable of being valley-folded to the other side in the third direction, the fourth wall portion is capable of being valley-folded to one side in the third direction, The bottom of the main body of the thermal insulation / cooling bag can be folded in a valley shape toward one side in the first direction.

19. The thermal insulation / cooling bag according to claim 15, the other side wall further includes a sixth wall portion on the other side in the second direction, a seventh wall portion on one side in the third direction, and an eighth wall portion on the other side in the third direction, the sixth wall portion has a sixth engaging protrusion that protrudes toward the second wall portion in the closed state, and the sixth engaging protrusion abuts against the second wall portion in the closed state; the seventh wall portion has a seventh engaging protrusion that protrudes toward the third wall portion in the closed state, and the seventh engaging protrusion abuts against the third wall portion in the closed state; the eighth wall portion has an eighth engaging protrusion that protrudes toward the fourth wall portion in the closed state, and the eighth engaging protrusion abuts against the fourth wall portion in the closed state; The thermal insulation / cooling bag, wherein the fifth engaging protrusion, the sixth engaging protrusion, the seventh engaging protrusion, and the eighth engaging protrusion are integrally connected to form a substantially annular engaging protrusion.

20. The thermal insulation / cooling bag according to claim 1, the one side wall further has an engaging portion provided on the first outer covering material of the first wall portion and supported by the first core material, the other side wall further includes an engagement portion provided on the sixth wall portion, In the closed state, the engaging portion of the one side wall and the engaging portion of the other side wall are detachably engaged with each other.

21. The thermal insulation / cooling bag according to claim 1, the side wall of the body is the one side wall, The heat and cold insulation bag, wherein the lid is connected to the side wall of the main body so as to be rotatable between the closed state and an open state in which the lid opens the opening of the main body.

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