Article storage case

Abstract

To provide an article storage case which can be used for freezing as well and can be easily folded.SOLUTION: In a basic state, an inner case body 10 is in the inner case basic state in a rectangular parallelepiped shape, an outer case body 30 is in the outer case basic state in the rectangular parallelepiped shape as well and a lid body 260 is in the lid body basic state. In a folded state, the inner case body 10 is in the inner case folded state, the outer case body 30 is in the outer case substantially folded state and the lid body 260 is in the lid body both edges joined folded state. The inner case body 10 changes from the inner case basic state into the inner case folded state, thus, the lid body 260 changes from the lid body basic state into the lid body both edges joined folded state as well, the outer case body changes from the outer case basic state into the substantially folded state as well and this article storage case changes from the basic state into the folded state.SELECTED DRAWING: Figure 9B

Description

[Technical Field]

[0001] The present invention relates to a case for storing items. [Background technology]

[0002] Cases (containers, boxes) are often used to transport various items. In order to transport goods while maintaining their cool or warm state, cases with insulating properties are used. For refrigeration, the heat insulating effect does not need to be as great as for freezing, but to be usable for freezing, the heat insulating effect must be great. For this reason, cases with a small insulating effect for refrigeration have their outer shells (bottom, two pairs of side walls, and lid) made of thin sheets, while cases with a large insulating effect that can also be used for freezing have their outer shells made of thick plates.

[0003] From the viewpoint of space saving, it is desirable that the article storage case be small when it does not store any articles (that is, when it is empty). Therefore, foldable item storage cases have been developed, one example of which is disclosed in Patent Document 1.

[0004] The above-mentioned product can be easily folded and restored. However, since it is intended for refrigeration and is made of a sheet, it can be manufactured without giving much consideration to its thickness.

[0005] On the other hand, as mentioned above, there are containers for storing items that can also be used for freezing, which are made from thick plates, so although there are foldable ones available, there are no containers that can be easily folded and then restored. In other words, when the thickness of the outer shell is taken into consideration, it is impossible to apply the container described in Patent Document 1 as it is to an article storage case that can also be used for freezing. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-88849 Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide an article storage case that can also be used for freezing and that can be easily folded. [Means for solving the problem]

[0008] A first aspect of the present invention is an item storage case in which an inner case body is housed in an outer case body, the inner case body having an inner case bottom plate portion, a pair of inner case first side plate portions, and a pair of inner case second side plate portions, the inner case bottom plate portions each having a rectangular shape with a pair of bottom plate first sides and bottom plate second sides, and a plurality of divided bottom plate portions divided along bottom plate portion bending lines extending parallel to the pair of bottom plate first sides, the bottom plate portion having a basic state in the shape of a horizontal flat plate, and a bottom plate portion bent state in which the bottom plate portion is bent downwardly convexly along the bottom plate portion bending lines, The pair of inner case first side plate portions are connected at their lower edges to the pair of first sides of the inner case bottom plate portion so as to be mutually swingable, and the pair of inner case second side plate portions correspond to the pair of second sides of the inner case bottom plate portion, are not connected at their lower edges to the second sides of the inner case bottom plate portion, and are connected at their respective side edges to the respective side edges of the pair of inner case first side plate portions so as to be mutually swingable, and are separated along second side plate portion bending lines extending in their height direction. The inner case body has a plurality of divided side plate portions, and is phase-transformable between a second side plate portion basic state in which the pair of inner case first side plate portions are separated from each other, the inner case bottom plate portion is in the bottom plate portion basic state, and the pair of inner case second side plate portions are in the second side plate portion basic state, and a second side plate portion basic state in which the pair of inner case first side plate portions are close to each other, and the inner case bottom plate portion is in the bottom plate portion folded state. and an inner case folded state in which the pair of inner case second side panel portions are in a bent state, and an inner case folded state in which the pair of inner case second side panel portions are in a bent state; the outer case body is formed from a flexible sheet and is capable of changing between an outer case basic state corresponding to the inner case basic state of the inner case body and an outer case approximately folded state corresponding to the inner case folded state in accordance with the phase change of the inner case body without interfering with the phase change of the inner case body between the inner case basic state and the inner case folded state.

[0009] The term "rectangular" means "rectangular" in a broad sense, and is a concept that includes "square".

[0010] The article storage case of this embodiment provides the following advantages. The inner case bottom plate portion of the inner case body can be bent convexly downward at the bottom plate portion bending line, and the pair of inner case first side plate portions can swing relative to a pair of first sides of the inner case bottom plate portion at their lower edges, and the pair of inner case second side plate portions are not connected to the second sides of the inner case bottom plate portion at their lower edges, can be bent convexly inward at the second side plate portion bending line, and can swing relative to each side edge of the pair of inner case first side plate portions at their respective side edges. The inner case body is capable of changing between an inner case basic state in which the pair of inner case first side plate portions are spaced apart, the inner case bottom plate portion is in the bottom plate basic state (forming a horizontal flat plate), and the pair of inner case second side plate portions are in the second side plate basic state (forming a flat plate), and an inner case folded state in which the pair of inner case first side plate portions are close together, the inner case bottom plate portion is in the bottom plate folded state (folded downward in a convex shape at the bottom plate folding line), and the pair of inner case second side plate portions are in the second side plate folded state (folded inward in a convex shape at the second side plate folding line). In addition, the outer case body is located outside the inner case body and can change between the outer case basic state (a state corresponding to the inner case basic state) and the outer case approximately folded state (a state corresponding to the inner case folded state) in accordance with the phase change of the inner case body, without interfering with the phase change of the inner case body between the inner case basic state and the inner case folded state.

[0011] In this way, with this item storage case, by manipulating the pair of inner case second side plate portions as needed and changing the pair of inner case first side plate portions between a separated state and a close state, it is possible to change between a basic state (a state in which the inner case body is in the inner case basic state and the outer case body is in the outer case basic state) and a folded state (a state in which the inner case body is in the inner case folded state and the outer case body is in the outer case approximately folded state). Therefore, in this item storage case, even if the elements that make up the inner case body (inner case bottom plate portion, inner case first side plate portion, inner case second side plate portion) are thick, insulating plates, they can easily be transformed between the basic state and the folded state. Thus, this storage case can be used for freezing and is easily foldable.

[0012] The first limited aspect of the first aspect is as follows. "An article storage case according to a first aspect, The plurality of divided bottom plate portions are a pair of divided bottom plate portions formed by dividing the bottom plate portion of the inner case into two along the bottom plate portion folding line, and the folded state of the bottom plate portion is such that the bottom plate portion of the inner case is folded downward in a valley fold at the bottom plate portion folding line. That is, this is the first aspect "The bottom plate portion of the inner case has a plurality of divided bottom plate portions divided along bottom plate portion bending lines extending parallel to the pair of bottom plate first sides, and is phase-transformable between a base state of the bottom plate portion forming a horizontal flat plate and a folded state of the bottom plate portion bent downward in a convex shape at the bottom plate portion bending lines," "The bottom plate of the inner case has a pair of split bottom plates that are split along a bottom plate folding line that extends parallel to the pair of first sides of the bottom plate, and is capable of transforming between a base state of the bottom plate that forms a horizontal, flat plate and a folded state of the bottom plate that is folded downward in a valley fold along the bottom plate folding line." It has been replaced by. In this limited embodiment, since there are a pair (two) of divided bottom plate portions, the structure is simpler than when there are three or more plates. The second aspect is a further limitation of this aspect.

[0013] The following are examples of the first aspect or a second limited aspect that limits the first limited aspect. "An article storage case of the first aspect or its first limited aspect, The plurality of divided side plate portions are a pair of divided side plate portions formed by dividing the second side plate portion of the inner case into two along the second side plate folding line, and the folded state of the second side plate portion is such that the second side plate portion of the inner case is folded inward in a valley fold at the second side plate folding line. That is, in the first aspect or the first limited aspect thereof "The pair of inner case second side plate portions have a plurality of divided side plate portions divided along second side plate portion bending lines extending in the height direction thereof, and are phase-transformable between a base state of the second side plate portion in a flat plate shape and a folded state of the second side plate portion in which the second side plate portion is bent inwardly in a convex shape along the second side plate portion bending lines," This has been replaced with "The pair of inner case second side plate portions have a pair of divided side plate portions that are divided into two along a second side plate portion bending line that extends in the height direction of the pair of inner case second side plate portions, and are capable of changing between a basic state of the second side plate portion in the shape of a flat plate and a folded state of the second side plate portion in which the second side plate portion is bent inward in a valley fold shape at the second side plate portion bending line." In this limited embodiment, since there are a pair (two) of divided side plate portions, the structure is simpler than when there are three or more side plate portions. The third aspect is a further limitation of this aspect.

[0014] A second aspect of the present invention is an item storage case of the first aspect, wherein the plurality of divided bottom plate portions are a pair of divided lid bodies formed by dividing the inner case bottom plate portion into two along the bottom plate portion folding line, and the folded state of the bottom plate portion is such that the inner case bottom plate portion is folded downward in a valley fold at the bottom plate portion folding line, and both divided bottom plate portions extend approximately vertically.

[0015] That is, this is the first aspect "The bottom plate portion of the inner case has a plurality of divided bottom plate portions divided along bottom plate portion bending lines extending parallel to the pair of bottom plate first sides, and is phase-transformable between a base state of the bottom plate portion forming a horizontal flat plate and a folded state of the bottom plate portion bent downward in a convex shape at the bottom plate portion bending lines," "The bottom plate of the inner case has a pair of split bottom plates divided along a bottom plate folding line extending parallel to the pair of first sides of the bottom plate, and is phase-transformable between a base state of the bottom plate forming a horizontal flat plate and a folded state of the bottom plate in which the split bottom plates are folded downward along the bottom plate folding line in a valley fold shape and extend substantially vertically." It has been replaced by. In this embodiment, since there is a pair of split bottom plate portions (two pieces), the structure is simpler than when there are three or more pieces, and since both split bottom plate portions extend almost vertically, they almost overlap, which means that the item storage case in the folded state can be thinner than if there were not.

[0016] A third aspect of the present invention is an item storage case according to the first or second aspect, wherein the plurality of divided side plate portions are a pair of divided side plate portions formed by dividing the second side plate portion of the inner case into two along the second side plate portion bending line, and the folded state of the second side plate portion is such that the second side plate portion of the inner case is bent inward in a valley fold at the second side plate portion bending line, and both divided side plate portions extend approximately along the pair of first side plate portions of the inner case.

[0017] That is, this is the first or second aspect "The pair of inner case second side plate portions have a plurality of divided side plate portions divided along second side plate portion bending lines extending in the height direction thereof, and are phase-transformable between a base state of the second side plate portion in a flat plate shape and a folded state of the second side plate portion in which the second side plate portion is bent inwardly in a convex shape along the second side plate portion bending lines," The above-mentioned second side plate portions of the pair of inner cases have a pair of divided side plate portions that are divided in half along a second side plate portion bending line that extends in the height direction of the pair of inner case second side plate portions, and are capable of changing between a second side plate portion basic state in which the second side plate portion forms a flat plate and a second side plate portion folded state in which the divided side plate portions are bent inward in a valley fold at the second side plate portion bending line and extend substantially along the pair of inner case first side plate portions. In this embodiment, since there is a pair of split side plate portions (two pieces), the structure is simpler than when there are three or more pieces, and since both split side plate portions extend roughly along the pair of inner case first side plate portions, the two split side plate portions roughly overlap, and the item storage case in the folded state can be thinner than if there were not.

[0018] A fourth aspect of the present invention is an item storage case according to any one of the first to third aspects, further comprising a lid body, wherein the lid body has a rectangular lid body main body portion having a pair of lid body first sides extending parallel to the pair of bottom plate first sides and a pair of lid body second sides extending parallel to the pair of bottom plate second sides, the lid body main body portion being swingable relative to the upper edge of the outer case body or the inner case body at the pair of lid body first sides, and having a plurality of split lid bodies split along lid body folding lines extending parallel to the pair of lid body first sides, and being capable of transforming between a lid body basic state in the shape of a horizontal flat plate and a lid body folded state in which the lid body main body portion is folded upwardly convexly at the lid body folding lines, wherein the inner case basic state is further such that the lid body main body portion is in the lid body basic state, and the inner case folded state is further such that the lid body main body portion is in the lid folded state.

[0019] The article storage case of this embodiment provides the following advantages. The lid body main body can swing relative to the upper edge of the outer case body or the inner case body at a pair of first lid sides, and can be transformed between a basic lid state in the shape of a horizontal flat plate and a folded lid state in which the lid is folded convexly upward at the lid folding line. The inner case body can be transformed between an inner case basic state in which the pair of inner case first side plate portions are spaced apart, the inner case bottom plate portion is in the bottom plate portion basic state (forming a horizontal flat plate), the pair of inner case second side plate portions are in the second side plate portion basic state (forming a flat plate), and the lid body main body portion is in the lid body basic state (forming a horizontal flat plate); and an inner case folded state in which the pair of inner case first side plate portions are close together, the inner case bottom plate portion is in a bottom plate portion folded state (folded downward convexly at the bottom plate portion folding line), the pair of inner case second side plate portions are in a second side plate portion folded state (folded inward convexly at the second side plate folding line), and the lid body main body portion is in a lid body folded state (folded upward convexly at the lid body folding line). In addition, the outer case body is located outside the inner case body and can change between the outer case basic state (a state corresponding to the inner case basic state) and the outer case approximately folded state (a state corresponding to the inner case folded state) in accordance with the phase change of the inner case body, without interfering with the phase change of the inner case body between the inner case basic state and the inner case folded state.

[0020] In this way, with this item storage case, by manipulating the pair of inner case second side plate portions as needed and changing the pair of inner case first side plate portions between a separated state and a close state, it is possible to change between a basic state (a state in which the inner case body is in the inner case basic state, the outer case body is in the outer case basic state, and the lid body main body portion is in the lid body basic state) and a folded state (a state in which the inner case body is in the inner case folded state, the outer case body is in the outer case approximately folded state, and the lid body main body portion is in a folded state). Therefore, in this item storage case, even though the elements that make up the inner case body (inner case bottom plate portion, inner case first side plate portion, inner case second side plate portion) and the lid body main body portion are thick, insulating plates, the case can easily be transformed between the basic state and the folded state. Thus, this storage case can be used for freezing and is easily foldable.

[0021] A fifth aspect of the present invention is an item storage case of the fourth aspect, wherein the multiple split lid bodies are a pair of split lid bodies in which the lid body main body is split into two along the lid body folding line, and the lid body folded state is such that the lid body main body is folded upward in a mountain fold.

[0022] That is, this is the fourth aspect "The lid body main body portion has a plurality of divided lid bodies divided along lid body bending lines extending parallel to the pair of lid body first sides, and is phase-transformable between a lid body basic state forming a horizontal flat plate and a lid body folded state in which the lid body is folded upward in a convex shape at the lid body bending lines." The description has been replaced with "The lid body main body portion has a pair of split lid bodies divided into two along a lid body bending line extending parallel to the pair of first sides of the lid body, and is capable of transforming between a basic state of the lid body in the shape of a horizontal flat plate and a folded state of the lid body in which it is bent upward in a mountain fold at the lid body bending line." In this embodiment, since there are a pair (two) of divided bottom plate portions, the structure is simpler than when there are three or more plates.

[0023] The following are limited aspects of the fifth aspect: "An article storage case according to a fifth aspect, The folded state of the cover is such that both split cover bodies extend substantially vertically. That is, this is the fourth aspect "The lid body main body portion has a plurality of divided lid bodies divided along lid body bending lines extending parallel to the pair of lid body first sides, and is phase-transformable between a lid body basic state forming a horizontal flat plate and a lid body folded state in which the lid body is folded upward in a convex shape at the lid body bending lines." The description has been replaced with "The lid body main body portion has a pair of split lid bodies divided into two along a lid body bending line extending parallel to the pair of first sides of the lid bodies, and is capable of changing between a basic lid body state in the shape of a horizontal flat plate and a lid body folded state in which the split lid bodies are folded upward in a mountain fold at the lid body bending line and extend almost vertically." In this limited embodiment, the two split lid bodies extend almost vertically, so that the two split lid bodies almost overlap, and the folded item storage case can therefore be thinner than if this were not the case.

[0024] A sixth aspect of the present invention is an item storage case of the fourth aspect, wherein the multiple split lid bodies are a pair of first-side split lid bodies and a central-side split lid body formed by dividing the lid body main body along the multiple lid body folding lines, the pair of first-side split lid bodies including the pair of lid body first sides, and the central-side split lid body being positioned between the pair of first-side split lid bodies.

[0025] That is, this is the fourth aspect "The lid body main body portion has a plurality of divided lid bodies divided along lid body bending lines extending parallel to the pair of lid body first sides, and is phase-transformable between a lid body basic state forming a horizontal flat plate and a lid body folded state in which the lid body is folded upward in a convex shape at the lid body bending lines." The description has been replaced with "The lid body main body has a pair of first-side divided lid bodies and a central-side divided lid body that are divided along a plurality of lid body bending lines that extend parallel to the pair of lid body first sides, the pair of first-side divided lid bodies including the pair of lid body first sides, the central-side divided lid body being located between the pair of first-side divided lid bodies, and being capable of transforming between a lid body basic state that is a horizontal flat plate and a lid body folded state that is folded convexly upward at the lid body bending lines." In this embodiment, the divided bottom plate is three or more pieces, and the height of the lid body in the folded state can be lower than in the case of a two-piece lid, so the item storage case in the folded state can be made smaller accordingly.

[0026] A seventh aspect of the present invention is an item storage case according to any one of the first to sixth aspects, wherein the outer case body has an outer case bottom, a pair of outer case first side parts, a pair of outer case second side parts, and a pair of folding assist parts, the outer case first side parts correspond to the inner case bottom plate part of the inner case body, the pair of outer case first side parts correspond to the pair of inner case first side plate parts of the inner case body, the pair of outer case second side parts correspond to the pair of inner case second side plate parts of the inner case body, and the pair of folding assist parts connect the outer case bottom and the bottom case second side parts. As the bottom plate portion of the inner case attempts to change from the basic bottom plate state to the folded bottom plate state, the pair of divided bottom plate portions of the inner case bottom plate portion, which tend to move in a direction having a vertical downward component, are pulled downward by pressing downward on the bottom of the outer case, thereby extending in a direction having a vertical component between the pair of second side portions of the outer case and the bottom of the outer case, stretching the outer case body downward and allowing the bottom plate portion of the inner case to change from the basic bottom plate state to the folded bottom plate state.This is an item storage case.

[0027] In addition to the effects of the item storage case of any one of the first to sixth aspects, the item storage case of this aspect has the following effects. In this item storage case, the outer case bottom, a pair of outer case first side portions, and a pair of outer case second side portions of the outer case body correspond to the inner case bottom plate portion, a pair of inner case first side plate portions, and a pair of inner case second side plate portions of the inner case body, respectively, but this alone does not allow the outer case body to change between the outer case basic state and the outer case approximately folded state in accordance with the phase change between the inner case basic state and the inner case folded state of the inner case body. Here, in this article storage case, the outer case body has a folding assisting portion that connects the outer case bottom and the bottom case second side portion, and provides the following effects. As the bottom plate portion of the inner case attempts to change from the base state of the bottom plate portion to the folded state of the bottom plate portion, the pair of divided side plate portions of the inner case bottom plate portion attempt to move in a direction having a vertical downward component. As the pair of divided bottom plate portions press downward on the bottom of the outer case, the folding assist portion is pulled downward, extending in a direction having a vertical component between the pair of second side portions of the outer case and the bottom of the outer case, causing the outer case body to extend downward. In this way, the folding assisting portion allows the bottom plate portion of the inner case to change phase from the bottom plate portion basic state to the bottom plate portion folded state. In this way, in this article storage case, the outer case body changes from the outer case basic state to the outer case approximately folded state in response to the inner case body changing from the inner case basic state to the inner case folded state. In this way, with this item storage case, the effects of any one of the first to sixth aspects of the item storage case can be more specifically obtained.

[0028] An eighth aspect of the present invention is an item storage case of the seventh aspect, wherein the pair of folding auxiliary portions are formed by combining each bottom-side auxiliary portion forming portion formed continuously with the bottom of the outer case by the sheet forming the bottom of the outer case, and each second-side auxiliary portion forming portion formed continuously with each second side of the outer case by the sheet forming the second side of the outer case.

[0029] In addition to the effects of the item storage case of the seventh aspect, the item storage case of this aspect has the following effects. In this item storage case, a pair of folding auxiliary portions are formed by combining each bottom-side auxiliary portion forming portion formed by the sheet that forms the bottom of the outer case and each second-side auxiliary portion forming portion formed by the sheet that forms the second side of the outer case, and therefore, in each folding auxiliary portion, the relative positional relationship between the bottom-side auxiliary portion forming portion and the second-side auxiliary portion forming portion changes, thereby changing the relative positional relationship between the bottom of the outer case and the second side of the outer case. Therefore, as described above, as the bottom plate portion of the inner case attempts to change from the basic state of the bottom plate portion to the folded state of the bottom plate portion, the bottom portion of the outer case is pressed downward by the pair of divided bottom plate portions of the inner case bottom plate portion, the folding assist portion is pulled downward, and the folding assist portion is able to extend in a direction having a vertical component between the bottom portion of the outer case and the pair of second side portions of the outer case, allowing the outer case body to extend downward. Thus, with this item storage case, the effects of the item storage case of the seventh aspect can be more specifically obtained.

[0030] A ninth aspect of the present invention is an item storage case of the eighth aspect, wherein the bottom-side auxiliary portion forming portion extends toward its tip end with its base edge being the boundary portion with the bottom of the outer case, the second side-side auxiliary portion forming portion extends toward its tip end with its base edge being the boundary portion with the second side of the outer case corresponding to the bottom-side auxiliary portion forming portion, and the folding auxiliary portion is formed by combining a portion other than the base edge of the bottom-side auxiliary portion forming portion and a portion other than the base edge of the second side-side auxiliary portion forming portion.

[0031] "The folding auxiliary portion is formed by joining a portion other than the base edge of the bottom side auxiliary portion forming portion and a portion other than the base edge of the second side side auxiliary portion forming portion" should be changed to "The folding auxiliary portion is formed by joining an edge portion other than the base edge of the bottom side auxiliary portion forming portion and an edge portion other than the base edge of the second side side auxiliary portion forming portion."

[0032] In addition to the effects of the item storage case of the eighth aspect, the item storage case of this aspect has the following effects. In this item storage case, in each folding auxiliary part, the bottom auxiliary part forming part and the second side auxiliary part forming part are not joined at the base edge of the folding auxiliary part itself. Therefore, as described above, as the bottom plate portion of the inner case attempts to change from the basic state of the bottom plate portion to the folded state of the bottom plate portion, the bottom of the outer case is pressed downward by a pair of divided bottom plate portions of the bottom plate portion of the inner case, and the folding auxiliary portion is pulled downward, so that in the folding auxiliary portion, the bottom side auxiliary portion forming portion and the second side side auxiliary portion forming portion can move apart from each other based on their own base edge portions. In this way, the folding assisting portion can extend in a direction having a vertical component between the pair of outer case second side portions and the outer case bottom portion, allowing the outer case body to extend downward. Thus, with this item storage case, the effects of the item storage case of the eighth aspect can be more specifically obtained.

[0033] A tenth aspect of the present invention is an item storage case according to the ninth aspect, wherein the bottom-side auxiliary portion forming portion has a shape that gradually narrows in width from the boundary with the bottom of the outer case as it approaches its tip, and the second-side auxiliary portion forming portion has a shape that gradually narrows in width from the boundary with the second side of the outer case as it approaches its tip, corresponding to the bottom-side auxiliary portion forming portion, as it approaches its tip.

[0034] The "shape that gradually narrows toward the tip" includes an isosceles triangle shape, a trapezoid shape, a semicircular shape, etc. The "isosceles triangle shape" includes a "right-angled isosceles triangle shape."

[0035] In addition to the effects of the item storage case of the ninth aspect, the item storage case of this aspect has the following effects. In this item storage case, each of the bottom-side auxiliary portion forming portion / second-side auxiliary portion forming portion has a shape that gradually narrows in width as it approaches the tip, with the boundary portion with the outer case bottom / outer case second side serving as the base edge, so that each folding auxiliary portion gradually becomes narrower in width as it approaches the tip from its own base edge. Therefore, as described above, as the inner case bottom plate portion attempts to change from the bottom plate portion basic state to the bottom plate portion folded state, when the folding assist portion attempts to change phase by moving the bottom side auxiliary portion forming portion and the second side side auxiliary portion forming portion apart based on its own base edge portion, the portion of the folding assist portion on the tip side is prevented from resisting the change in phase, and the outer case body can be smoothly changed from the outer case basic state to the outer case folded state. In this way, the storage case can be transformed more smoothly from the basic state to the folded state.

[0036] An eleventh aspect of the present invention is an item storage case of the ninth or tenth aspect, wherein the folding auxiliary portion further includes a joint formed by joining the vicinity of the center of the bottom side auxiliary portion forming portion and the vicinity of the center of the second side side auxiliary portion forming portion, and when the inner case body is in the folded inner case state, the portion of the bottom side auxiliary portion forming portion closer to the base edge than the joint and the portion of the second side side auxiliary portion forming portion closer to the base edge than the joint are continuous and approximately vertical with the second side of the outer case.

[0037] In addition to the effects of the item storage case of the ninth or tenth aspect, the item storage case of this aspect has the following effects. In this item storage case, the folding auxiliary portion further includes a joint formed by joining the centers of the bottom side auxiliary portion forming portion and the second side side auxiliary portion forming portion, and when the inner case body is in the folded inner case state, the portions of both the bottom side auxiliary portion forming portion and the second side side auxiliary portion forming portion that are closer to their base edge than the joint are in a nearly vertical state, continuous with the second side portion of the outer case. That is, when the portions of both the bottom-side auxiliary part-forming part and the second-side auxiliary part-forming part closer to the base edge than the joint part are continuously and substantially vertically aligned with the second side part of the outer case, the folding auxiliary part is in a state of maximum vertical extension. The fact that the joint part is formed in such a position means that the joint part is formed in the folding auxiliary part at a position closest to the base edge, within the range where the inner case body can be transformed into the folded state of the inner case. This prevents the bottom-side auxiliary portion forming portion and the second side-side auxiliary portion forming portion in the folding auxiliary portion from being too far apart, prevents the folding auxiliary portion from changing phase irregularly, allows the outer case body to change phase smoothly, and ultimately enables the item storage case to change phase smoothly.

[0038] A twelfth aspect of the present invention is an item storage case according to any one of the seventh to eleventh aspects, wherein each of the folding assist parts is detachably connected to each of the outer case second side parts when the item storage case is in the basic state.

[0039] In addition to the advantages of the seventh to eleventh aspects, the item storage case of this aspect has the following advantages. In this item storage case, when in the basic state, the folding assisting parts are detachably connected to the second side parts of each outer case, so that the case is compact even when in the basic state, and the folding assisting parts are prevented from getting in the way when storing items and transporting them, etc.

[0040] A thirteenth aspect of the present invention is an item storage case according to any one of the seventh to twelfth aspects, wherein the outer case body is provided with a belt that detachably connects the pair of outer case first side portions to each other so that they cannot be separated when the item storage case is in the folded state.

[0041] In addition to the advantages of the seventh to twelfth aspects of the storage case of this embodiment, the storage case of this embodiment also provides the following advantages. In this storage case, when the case is in a folded state, the pair of first side portions of the outer case are inseparably connected to each other by the belt. In this way, the folded state of the item storage case is maintained properly. [Brief explanation of the drawings]

[0042] [Figure 1A] 1A and 1B are perspective views showing an article storage case (in a basic state) according to a first embodiment of the present invention (showing a state in which the lid is in a closed position), in which (a) and (b) are views from different angles (both obliquely from above). [Figure 1B] 1A and 1B are perspective views showing an article storage case (in a basic state) according to a first embodiment of the present invention (showing a state in which the lid is in an open position), in which (a) is seen from diagonally above, and (b) is seen from diagonally below. [Figure 2A] 1 is an exploded perspective view showing an article storage case (in a basic state) according to a first embodiment of the present invention. [Figure 2B] 1 is an exploded perspective view showing an article storage case according to a first embodiment of the present invention (in a state between the basic state and the folded state). [Figure 2C] 1 is an exploded perspective view showing an article storage case (folded state) according to a first embodiment of the present invention. [Figure 3] 1 is an exploded perspective view showing an inner case body of an article storage case according to a first embodiment of the present invention. [Figure 4] 1 is an exploded perspective view showing an outer case body of an article storage case according to a first embodiment of the present invention. [Figure 5A] 1 is a perspective view showing a method of using the item storage case of the first embodiment of the present invention (transformation from the basic state to the folded state), showing the first stage. Of the first stages, (2) shows the stage following (1). [Figure 5B] 5B is a perspective view showing how to use the item storage case according to the first embodiment of the present invention (transformation from the basic state to the folded state), showing the next step from FIG. 5A. (b) is a perspective view seen from a different direction than (a). [Figure 5C]1 is a perspective view showing a method of using the item storage case of the first embodiment of the present invention (transformation from the basic state to the folded state), showing the final stage. [Figure 6] 5A to 5C, respectively. [Figure 7] 5A to 5C, respectively. [Figure 8A] 1A and 1B are perspective views showing an article storage case (in a basic state) according to a second embodiment of the present invention (showing a state in which the lid is in a closed position), in which (a) and (b) are views from different angles (both obliquely from above). [Figure 8B] 1A and 1B are perspective views showing an article storage case according to a second embodiment of the present invention (showing the inner and outer case bodies in their basic states and the lid body in the open position), where (a) is a view from diagonally above and (b) is a view from diagonally below. [Figure 9A] FIG. 10 is an exploded perspective view showing an article storage case (in a basic state) according to a second embodiment of the present invention. [Figure 9B] FIG. 10 is an exploded perspective view showing an item storage case according to a second embodiment of the present invention (in a state between the basic state and the folded state). [Figure 9C] FIG. 10 is an exploded perspective view showing an article storage case (folded state) according to a second embodiment of the present invention. [Figure 10] FIG. 10 is an exploded perspective view showing an inner case body and a lid body of an article storage case according to a second embodiment of the present invention. [Figure 11A] 10 is a perspective view showing a method of using an article storage case according to a second embodiment of the present invention (transformation from a basic state to a folded state), showing the initial stage. [Figure 11B]11A is a perspective view showing a method of using the item storage case according to the second embodiment of the present invention (transformation from the basic state to the folded state), showing the next step from FIG. [Figure 11C] 10 is a perspective view showing a method of using an article storage case according to a second embodiment of the present invention (transformation from a basic state to a folded state), showing the final stage. [Figure 12] 11A to 11C are vertical cross-sectional views showing how to use the storage case of the second embodiment of the present invention (transformation from the base state to the folded state), taken along a virtual vertical plane extending in the depth direction of the storage case. [Figure 13] 9B is an exploded perspective view showing an item storage case (in a state between the basic state and the folded state) according to a third embodiment of the present invention, and corresponds to FIG. 9B of the second embodiment. [Figure 14] 11C is a perspective view showing a folded state of an article storage case according to a third embodiment of the present invention, and corresponds to FIG. DETAILED DESCRIPTION OF THE INVENTION

[0043] [Example 1] Next, an article storage case according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 2A to 2C and other figures, this article storage case is a double-structured case that includes an inner case body 10 and an outer case body 30, as well as a lid body 60. This item storage case can be transformed between a basic state (FIG. 1A) in the shape of a rectangular parallelepiped and a folded state (FIG. 5C).

[0044] The "basic state" of this item storage case is a state in which the inner case body 10 is in a basic state in which it is a rectangular parallelepiped (inner case basic state), and the outer case body 30 is also in a basic state in which it is a rectangular parallelepiped (outer case basic state), as shown in Figures 1A to 2A, 5A, 6(A), and 7(A). Similarly, the "folded state" refers to a state in which the inner case body 10 is in a folded state (inner case folded state) and the outer case body 30 is in an approximately folded state corresponding to the inner case body 10 in the folded state, as shown in Figures 2C, 5C, 6(C), and 7(C). The cover 60 can be opened and closed, and can be displaced between a closed position (FIG. 1A) and an inverted position (FIG. 5C). The article storage case will be described based on the state where it is placed on a horizontal surface.

[0045] As shown in FIGS. 2A to 3, the inner case body 10 has an inner case bottom plate portion 12, a pair of inner case first side plate portions 14, and a pair of inner case second side plate portions 16. As shown in FIG. 1B(a) and FIG. 2A, the inner case body 10 has a rectangular parallelepiped shape that is open at the top when the item storage case is in its basic state (the inner case body 10 is in its inner case basic state). The inner case body 10 is housed inside the outer case body 30 and is detachably fixed to the outer case body 30 .

[0046] As shown in Figures 1A to 2C and 4, the outer case body 30 has an outer case bottom 32 (Figure 1B(b), Figure 4), a pair of outer case first side portions 34, a pair of outer case second side portions 36, and a pair of folding assist portions 50. As shown in Figures 1B and 2A, when the item storage case is in its basic state (the outer case body 30 is in its outer case basic state), the outer case body 30 has a rectangular parallelepiped shape with an open top and a pair of folding assist parts 50 attached to its lower end.

[0047] 2A to 2C, the lid body 60 has a main body 61, an attachment piece 62, and a bent piece 65. As shown in FIGS. 1A to 2C, the lid body 60 is detachably coupled to the outer case body 30 at the attachment piece 62 (FIGS. 2A to 2C) (FIGS. 1A and 1B).

[0048] First, the inner case body 10 will be described in detail with reference to FIGS. 2A to 3, 7, etc. As described above, the inner case body 10 has an inner case bottom plate portion 12 (Figures 2A and 3), a pair of inner case first side plate portions 14, and a pair of inner case second side plate portions 16, all of which are thick plate-shaped. That is, in both cases, a thick plate-shaped heat insulating material is covered with a sheet-shaped cover made of synthetic resin.

[0049] As also mentioned above, the inner case body 10 can be transformed between a basic state (inner case basic state) (Figures 2A, 7(A)) and a folded state (inner case folded state) (Figures 2C, 7(C)). The "basic state (inner case basic state)" of the inner case body 10 is a state in which, as shown in Figures 2A and 7(A), a pair of inner case first side plate portions 14 are in a separated state (first side wall portion separated state), and both the inner case bottom plate portion 12 and the inner case second side plate portion 16 are in a basic state (bottom plate portion basic state, second side plate portion basic state). Similarly, the "folded state (inner case folded state)" refers to a state in which a pair of inner case first side plate portions 14 are in a close proximity state (first side wall portions in a close proximity state), and both the inner case bottom plate portion 12 and the inner case second side plate portion 16 are in a folded state (bottom plate portion folded state, second side plate portion folded state), as shown in Figures 2C and 7(C).

[0050] The inner case bottom plate portion 12 has a horizontal rectangular shape when it and the inner case body 10 are in their basic state (FIG. 2A), and each has a pair of long sides (first bottom plate side) and short sides (second bottom plate side). As mentioned above, both of the pair of inner case first side plate portion 14 and inner case second side plate portion 16 of the inner case body 10 are thick plates, and the long side (first bottom plate side) of the inner case bottom plate portion 12 is the same size as the long side (width) of the inner case first side plate portion 14, and the short side (second bottom plate side) of the inner case bottom plate portion 12 is the same size as the short side (width) of the inner case second side plate portion 12.

[0051] 2A to 3, the inner case bottom plate portion 12 has a pair of split bottom plate portions 13 split into two along a folding line (bottom plate portion folding line) 11. The bottom plate portion folding line 11 connects the centers of both short sides of the inner case bottom plate portion 12 and extends in the direction of the long side of the inner case bottom plate portion 12. The two divided bottom plate portions 13 are connected so as to be able to be bent downward in a valley fold. That is, the divided bottom plate portions 13 are connected to each other at the upper edges of the end faces of the divided bottom plate portions 13 that face each other so as to be able to swing (rotate) relative to each other.

[0052] More precisely, the bottom plate fold line 11 is a portion connecting the upper edges, and the inner case bottom plate 12 is divided into a pair of split bottom plate portions 13 by a plane including the bottom plate fold line 11. The split bottom plate portions 13 are connected at the bottom plate fold line 11 so that they can be folded downward in a valley fold. Therefore, the inner case bottom plate portion 12 can be folded downward at the bottom plate portion folding line 11 in a valley fold shape.

[0053] In this way, the inner case bottom plate portion 12 can be transformed between the basic state (FIGS. 2A and 7(A)) and the bent state (FIGS. 2C and 7(C)). The "basic state (basic state of bottom plate portion)" of the inner case bottom plate portion 12 is a state in which the entire bottom plate portion 12 forms a single flat plate (a single flat plate) and extends horizontally and perpendicular to both inner case first side plate portions 14, as shown in Figures 2A and 7(A). Similarly, the "folded state (bottom plate portion folded state)" refers to a state in which each divided bottom plate portion 13 extends vertically downward (hangs down) from the corresponding inner case first side plate portion 14 and both divided bottom plate portions 13 overlap each other, as shown in Figures 2C and 7(C). It should be noted that there may be cases where each divided bottom plate portion 13 extends substantially vertically and both divided bottom plate portions 13 are close to each other but do not overlap (are not in surface contact).

[0054] As shown in FIGS. 2A and 3, each of the inner case first side plate portions 14 corresponds to one of the long sides of the inner case bottom plate portion 12, and has a vertical rectangular shape. That is, each inner case first side plate portion 14 extends in the width direction of the item storage case as well as in the vertical direction, and each has a pair of horizontal long sides (sides in the width direction) and a vertical short side (sides in the height direction). As described above, the long side of each inner case first side plate portion 14 (the side in the width direction of this item storage case) is the same size as the long side of the inner case bottom plate portion 12.

[0055] Each inner case first side plate portion 14 is connected at the inner edge of its lower edge portion (lower long side) to the lower edge of the long side of the inner case bottom plate portion 12 (the outer edge portion of the divided bottom plate portion 13 on the side of the inner case first side plate portion 14) so ​​as to be able to swing (rotate) relative to the same.

[0056] In detail, it is as follows: As shown in FIG. 3, a stitching margin 22 is formed on the edge of each long side of the inner case bottom plate portion 12. Each stitching portion 22 is in the form of a flexible, narrow sheet, and extends from the lower edge of the end face of each long side of the inner case bottom plate portion 12 (in the basic state). As described above, the inner case bottom portion is formed by covering a thick plate-like insulating material with a synthetic resin sheet-like cover, and each stitching portion 22 is formed integrally with the inner case bottom plate portion 12 by the cover. Each stitching margin portion 22 is joined to the end face (the outer edge and inner edge thereof) that forms the lower edge portion of each inner case first side plate portion 14 by stitching. Thus, the inner case bottom plate portion 12 is swingable (rotatable) at each of its long sides (its lower edges) relative to the lower edge portions (the inner edges) of the inner case first side plate portions 14.

[0057] Thus, as shown in Figures 2A to 2C and 7, as the pair of inner case first side plate portions 14 change phase between a separated state (Figures 2A, 7(A)) and a close state (Figures 2C, 7(C)), the inner case bottom plate portion 12 changes phase between the basic state (Figure 2A) and the folded state (Figure 2C), as described above. The "separated state (first side plate portion separated state)" of a pair of inner case first side plate portions 14 is the state in which the first side plate portions 14 of both inner cases are furthest apart from each other, as shown in Figures 2A and 7(A). Similarly, the "close state (first side plate portion close state)" refers to the state in which the first side plate portions 14 of both inner cases are closest to each other, as shown in FIG. 2C and FIG. 7(C).

[0058] As shown in Figure 2A, the inner case bottom plate portion 12 in the basic state is located inside the inner case first side plate portions 14 in the separated state, and the lower surface of the inner case bottom plate portion 12 in the basic state and the end surfaces forming the lower edge portions (lower long sides) of the inner case first side plate portions 14 are flush with each other.

[0059] As shown in FIG. 2A, each inner case second side plate portion 16 corresponds to each short side of the inner case bottom plate portion 12 in the basic state of itself and the inner case body 10, and has a vertical rectangular shape. Each inner case second side panel portion 16, in the basic state of itself and the inner case body 10, extends in the depth direction of the item storage case and also in the vertical direction, and each has a pair of horizontal short sides (sides in the width direction) and a vertical long side (sides in the height direction).

[0060] As described above, the short side of each inner case second side plate portion 16 (the side in the depth direction of this item storage case) is the same size as the short side of the inner case bottom plate portion 12. The long side (the side in the height direction of this item storage case) of each inner case second side plate portion 16 has a dimension obtained by subtracting the thickness of the inner case bottom plate portion 12 from the dimension of the short side (also the side in the height direction of this item storage case) of the first side wall portion. 2A, the upper edge (upper short side) of each inner case second side plate portion 16 is located at the same height as the upper edge (upper long side) of each inner case first side plate portion 14. The lower edge (lower short side) of each inner case second side plate portion 16 is located higher than the lower edge (lower long side) of each inner case first side plate portion 14 by the thickness of the inner case bottom plate portion 12.

[0061] 2A to 3, the inner case second side plate 16 has a pair of split side plate portions 17 split into two along a folding line (second side plate folding line) 15. The second side plate folding line 15 connects the centers of both short sides of the inner case second side plate 16 and extends in the direction of the long side of the inner case second side plate 16 (the height direction of this item storage case). The two divided side plate portions 17 are connected so as to be bendable inward (in the direction of approaching each other) in a valley fold. That is, the two divided side plate portions 17 of the inner case second side plate portion 16 are connected to each other so as to be able to swing (rotate) relative to each other at the outer edges of the end faces that form the edge portions of the two divided side plate portions 17 on the opposing sides.

[0062] More precisely, second side plate folding line 15 is a portion that connects the outer edges, and inner case second side plate 16 is divided into a pair of split side plates 17 by a plane that includes second side plate folding line 15. Both split side plates 17 are connected at second side plate folding line 15 so that they can be bent inward in a valley fold. Therefore, the inner case second side plate portion 16 can be folded inward at the second side plate portion folding line 15 in a valley fold shape.

[0063] In this way, each inner case second side plate portion 16 can be transformed between a base state (FIG. 2A) and a folded state (FIG. 2C). The "basic state (basic state of second side plate portion)" of the inner case second side plate portion 16 is a state in which both divided side plate portions 17 form a single flat plate (one flat plate) as a whole, and are perpendicular to both inner case first side plate portions 14, as shown in Figures 2A and 7(A). Similarly, the "folded state (second side plate portion folded state)" is a state in which, as shown in Figures 2C and 7(C), both divided side plate portions 17 extend inward parallel to both inner case first side plate portions 14, and both inner case first side plate portions overlap each other between both inner case first side plate portions 14 and extend along both inner case first side plate portions 14. In addition, there are also cases where both divided side plate portions 17 extend inward approximately parallel to both inner case first side plate portions 14, and between both inner case first side plate portions 14, the both inner case first side plate portions are close to each other but do not overlap (without surface contact), and extend approximately along both inner case first side plate portions 14. In either case, the "bent state (second side plate portion bent state)" described above refers to the case where the inner case body 10 is considered alone. When combined with the outer case body 30, as shown in FIG. 5C, the degree of bending is slightly smaller than described above, taking into account the outer case second side portion 36. However, this point is a minor detail and will be ignored in the discussion. The same applies to the effect of this on other elements of the inner case body 10.

[0064] As shown in Figure 2A, in the basic state, each inner case second side plate portion 16 corresponds to each short side of the inner case bottom plate portion 12 (as described above) and is located on the inner case bottom plate portion 12, but each inner case second side plate portion 16 is not connected to the inner case bottom plate portion 12.

[0065] As shown in Figures 2A to 3, the inner edges of each side edge (each long side) of each inner case second side plate portion 16 are connected to the inner surface of each inner case first side plate portion 14 near each short side so as to be able to swing (rotate) relative to each other. In this way, as shown in Figures 2A to 2C and 7, the inner case second side plate portion 16 changes between its basic state and its bent state as the inner case first side plate portions 14 move away from or towards each other.

[0066] In detail, it is as follows: As shown in FIG. 3, each inner case second side plate portion 16 has a stitching margin portion 26 formed on each side edge portion (each long side). Each stitching portion 26 is in the form of a flexible, narrow sheet, and extends from the inner edge of the end face of each long side of the inner case second side plate portion 16 (in the basic state). As described above, each inner case second side plate portion 16 is formed by covering a thick plate of insulating material with a synthetic resin sheet-like cover, and each stitching portion 26 is formed integrally with the inner case second side plate portion 16 by the cover. Each stitching portion 26 has a width equal to the thickness of each inner case second side plate portion 16, and is joined by stitching to the inner surface of each inner case first side plate portion 14 near each short side. The leading edge of each stitching portion 26 is located at each short side of the inner surface of each inner case first side plate portion 14.

[0067] Thus, as shown in Figures 2A to 2C and 7, by changing the phase of the first side plate portions 14 of both inner cases between a separated state (Figures 2A and 7(A)) and a close state (Figures 2C and 7(C)), each inner case second side plate portion 16 can change its phase between a basic state (Figures 2A and 7(A)) and a folded state (Figures 2C and 7(C)), as described above. As shown in Figure 2A, in the basic state, each inner case second side plate portion 16 is located inside both inner case first side plate portions 14 in the separated state, and the outer surface of each inner case second side plate portion 16 in the basic state and the end faces forming each side edge portion (each short side) of both inner case first side plate portions 14 are flush with each other.

[0068] As shown in FIGS. 2A to 3, a pair of bottom plate thick covering portions 18 are formed on the lower edge of each inner case second side plate portion 16 (the pair of divided side plate portions 17 thereof). Each of the thick bottom plate covering portions 18 is in the form of a sheet and is flexible. As mentioned above, each inner case second side plate portion 16 is formed by covering a thick plate-shaped insulating material with a sheet-shaped synthetic resin cover, and each bottom plate portion thick covering portion 18 is formed integrally with the inner case second side plate portion 16 by that cover.

[0069] Each bottom plate thick covering portion 18 extends downward from the outer edge (its entire length) of the end face forming the lower edge portion of each divided side plate portion 17 by a distance equal to the thickness of the inner case bottom plate portion 12. A pair of bottom plate thick covering portions 18 are not directly joined to each other. Each bottom plate thick covering portion 18 is sheet-shaped and flexible (as described above), and normally extends vertically downward and continuously with the outer surface of each inner case second side plate portion 16 (each divided side plate portion 17). Each bottom plate thick covering portion 18 can be elastically transformed into a position extending horizontally outward perpendicular to the outer surface of each inner case second side plate portion 16 (each divided side plate portion 17) (and even beyond that, to a position extending vertically upward).

[0070] 2A, in the inner case body 10 in the basic state, each inner case second side plate portion 16 is formed as a single plate and is located on the inner case bottom plate portion 12 at each short side of the inner case bottom plate portion 12 and in the vicinity thereof (corresponding to the thickness of the inner case second side plate portion 16), and each bottom plate thick covering portion 18 is located outside each short side of the inner case bottom plate portion 12, extends vertically downward, and covers the end face of the short side. In this way, the airtightness of the inside of the inner case body 10 is improved. As shown in Figures 2A to 2B, when the inner case body 10 (each inner case second side plate portion 16) changes phase toward the folded state, each bottom plate portion thick covering portion 18 elastically changes phase from the vertical state as appropriate by abutting against the inner case bottom plate portion 12. The same is true in the reverse case, and as shown in Figure 2B → Figure 2A, when the inner case body 10 (each inner case second side plate portion 16) returns to its basic state, each bottom plate portion thick covering portion 18 returns to a vertical state, positioned outside the short side of the inner case bottom plate portion 12.

[0071] As described above in detail, by changing the phase of the first side plate portions 14 of both inner cases between the separated state (Figures 2A, 7(A)) and the close state (Figures 2C, 7(C)), the phase of the inner case body 10 can be changed between the basic state (Figures 2A, 7(A)) and the folded state (Figures 2C, 7(C)).

[0072] When attempting to change the phase of the inner case body 10 from the basic state (FIG. 2A) to the folded state (FIG. 2C), the phase change can be carried out smoothly by first artificially changing the phase of both inner case second side plate portions 16 slightly toward the folded state, as shown by the solid arrows in FIG. 2A, and then attempting to change the phase of both inner case first side plate portions 14 toward the close-coupled state. Similarly, in the reverse case, when attempting to change the phase of the inner case body 10 from the folded state (Figure 2C) toward the basic state (Figure 2A), the phase change can be smoothly performed by changing the phase of both inner case first side plate portions 14 toward the separated state so that the inner case body 10 (both inner case second side plate portions 16) reaches a state close to the basic state, and then artificially changing the phase of both inner case second side plate portions 16 slightly toward the basic state, as shown by the dashed double-dashed arrow in Figure 2A.

[0073] Next, outer case body 30 will be described in detail with reference to FIGS. 1A to 2C, 4, 7, etc. As described above, the outer case body 30 has an outer case bottom 32 (FIG. 1B(b), FIG. 4), a pair of outer case first side portions 34, a pair of outer case second side portions 36, and a pair of folding assist portions 50. All of these are formed from a synthetic resin sheet and are flexible, and the angles of the boundaries between these elements are also variable. As shown in Figures 2A to 2C, the outer case bottom 32, a pair of outer case first side portions 34, and a pair of outer case second side portions 36 of the outer case body 30 correspond to the inner case bottom plate portion 12, a pair of inner case first side plate portions 14, and a pair of inner case second side plate portions 16 of the inner case body 10, respectively.

[0074] As also mentioned above, the outer case body 30 can be transformed between a basic state (outer case basic state) (Figures 2A, 7(A)) and an approximately folded state (outer case approximately folded state) (Figures 2C, 7(C)). As shown in FIG. 2A and FIG. 7(A), the basic state of the outer case body 30 (outer case basic state) corresponds to the basic state of the inner case body 10 (inner case basic state). As shown in FIG. 2C and FIG. 7(C), the substantially folded state of the outer case body 30 (outer case substantially folded state) corresponds to the folded state of the inner case body 10 (inner case folded state).

[0075] As mentioned above, the outer case body 30 is flexible and can assume various shapes other than its basic state when used alone, but when the inner case body 10 is housed inside the outer case body 30, when the inner case body 10 is in a folded state, the outer case body 30 assumes a corresponding approximately folded state. In accordance with the phase change of the inner case body 10 between the basic state and the folded state, the outer case body 30 also changes between the basic state and the approximately folded state.

[0076] The "basic state (outer case basic state)" of the outer case body 30 is a state in which the pair of outer case first side portions 34 are in a separated state (first side separated state), and both the outer case bottom portion 32 and the outer case second side portion 36 are in a basic state (bottom basic state and second side basic state), as shown in Figures 2A and 7(A). The "separated state (first side separated state)" of the pair of outer case first side portions 34 refers to a state in which the outer case first side portions 34 are the furthest apart from each other. The "basic state (basic state of bottom portion and basic state of second side portion)" of the outer case bottom portion 32 and the outer case second side portion 36 refers to a state in which both are in a planar natural state.

[0077] The "substantially folded state (outer case substantially folded state)" of the outer case body 30 is the following state, as shown in FIG. 2C and FIG. 7(C). The pair of outer case first side portions 34 correspond to the two inner case first side plate portions 14 that are in close proximity to each other, and the two outer case first side portions 34 are in a state where they are quite close to each other. The outer case bottom portion 32 is in a state where it is folded in a generally valley-like shape (FIG. 7(C)) in correspondence with the folded inner case bottom plate portion 12. The outer case second side portion 36, together with the folding assisting portion 50 which is substantially vertical, is in a bent state corresponding to the bent inner case second side plate portion 16.

[0078] As shown in FIG. 1B(b) and FIG. 4, the outer case bottom 32 has a horizontal rectangular shape in the basic state (FIG. 2A) of itself and the outer case body 30, and both have a pair of long and short sides. As shown in Figures 1A to 2A and 4, each outer case first side 34 corresponds to each long side of the outer case bottom 32 (Figure 4), and has a vertical rectangular shape when it and the outer case body 30 are in their basic state (Figure 2A). As also shown in Figures 1A to 2A and 4, each outer case second side 36 corresponds to each short side of the outer case bottom 32 (Figure 4), and has a vertical rectangular shape when it and the outer case body 30 are in their basic state (Figure 2A).

[0079] 4, the outer case bottom 32 is formed from a flexible outer case bottom sheet 31. The pair of outer case second side portions 36 are formed from a pair of outer case second side sheets 35 that are also flexible. The pair of folding auxiliary portions 50 are formed by the outer case bottom sheet 31 and the pair of outer case second side sheets 35 described above.

[0080] The outer case bottom sheet 31 has a rectangular base in its natural planar state, and has a pair of long sides (reference numerals omitted) that correspond to the width direction of the item storage case. The rectangular portion forms the bottom 32 of the outer case.

[0081] Bottom-side auxiliary portion forming portions 52 are formed on both ends of the outer case bottom sheet 31 (corresponding to a pair of short sides of the outer case bottom sheet 31). The bottom-side auxiliary portion forming portion 52 has a right-angled isosceles triangle shape and has a pair of oblique sides (reference numerals omitted).

[0082] Each outer case first side portion 34 corresponds to a long side of the outer case bottom portion 32 and has a vertical rectangular shape. That is, in a natural planar state, each outer case first side portion 34 extends in the width direction of the item storage case and also in the vertical direction, and each has a pair of horizontal long sides and a vertical short side. As shown in Figures 2A and 4, each outer case first side 34 is joined at its lower edge (lower long side) to each long side of the outer case bottom 32 (each long side of the outer case bottom sheet 31) by sewing.

[0083] Each outer case second side sheet 35 has a rectangular base when in its natural planar state, and has a pair of long sides (reference numerals omitted) that correspond to the height direction of the item storage case. The rectangular portion forms the second outer case side portion 36. The outer case second side portion 36 and the outer case bottom portion 32 are not directly joined together.

[0084] A second side auxiliary portion forming portion 56 is formed at the lower end of each outer case second side portion sheet 35 (corresponding to the lower short side of the outer case second side portion 36). The second side auxiliary portion forming portion 56 corresponds to the bottom auxiliary portion forming portion 52. The second side auxiliary portion forming portion 56 also has a right-angled isosceles triangle shape and has a pair of hypotenuses (reference numerals omitted).

[0085] As shown in Figures 2A and 4, each outer case first side portion 34 and each outer case second side portion sheet 35 (the portion thereof that forms the outer case second side portion 36) are joined together at their respective side edges by sewing.

[0086] As shown in Figure 4, each folding auxiliary portion 50 (Figure 2A, etc.) is formed by each bottom side auxiliary portion forming portion 52 of the outer case bottom sheet 31 and each second side side auxiliary portion forming portion 56 of each outer case second side sheet 35. That is, each bottom side auxiliary portion forming portion 52 and each second side side auxiliary portion forming portion 56 have the shape of a corresponding right-angled isosceles triangle (as described above), and each folding auxiliary portion 50 is formed by joining the two together by sewing their hypotenuses together (or more precisely, near them). 2A and other figures, each folding assist part 50 has a right-angled isosceles triangle shape, and has a pair of hypotenuses (more precisely, near the hypotenuses) with sewn joints 54. In this way, each folding assist part 50 connects the outer case bottom part 32 and each outer case second side part 36. In each folding auxiliary portion 50, an internal space is formed by the bottom auxiliary portion forming portion 52 and the second side auxiliary portion forming portion 56 in a predetermined case.

[0087] In each folding auxiliary part 50, the bottom auxiliary part forming parts 52 and the second side auxiliary part forming parts 56 are joined together near the centers. Thus, each folding auxiliary part 50 has a sewn joint part 55 (joined part) near the center.

[0088] As shown in Figures 1A to 2A and Figure 6(A), when the outer case body 30 is in its basic state, each bottom side auxiliary portion forming portion 52 and each second side side auxiliary portion forming portion 56 overlaps (Figure 6(A)), and each folding auxiliary portion 50 is formed as a single piece overall. Each folding assist part 50 is flexible like the other elements of the outer case body 30, and when the outer case body 30 is in its basic state, it can change between a position extending horizontally outward (Figure 2A) and a position extending vertically upward along the outer case second side part 36 (its outer surface) (Figure 1) (it can also change into a position extending vertically downward or a position extending horizontally along the outer case bottom part 32 (its lower surface)).

[0089] As shown in FIGS. 2A and 4, a hook-and-loop fastener (female) 58 is provided at the tip of each folding assisting portion 50 (the surface thereof facing the second outer case side portion 36). Correspondingly, each outer case second side portion 36 is provided with a hook-and-loop fastener (male) 48. When the outer case body 30 is in its basic state, each folding assist part 50 is detachably connected to each outer case second side part 36 by connecting the hook-and-loop fastener (female) 58 and the hook-and-loop fastener (male) 48 in a position facing vertically upward (Figure 1).

[0090] As described above based on Figures 2A and 4, etc., in each folding auxiliary portion 50, each bottom side auxiliary portion forming portion 52 and each second side side auxiliary portion forming portion 56 are joined at sewn joints 54 and 55, but the base edge of each bottom side auxiliary portion forming portion 52 (the boundary portion with the outer case bottom 32) and the base edge of each second side side auxiliary portion forming portion 56 (the boundary portion with the outer case second side 36) are not joined (as described above, the outer case second side 36 and the outer case bottom 32 are not directly joined). That is, in each folding auxiliary portion 50, other than at the sewn joint portion 54 and the sewn joint portion 55, each bottom side auxiliary portion forming portion 52 (Figure 4) of the outer case bottom sheet 31 and each second side side auxiliary portion forming portion 56 (Figure 4) of each outer case second side sheet 35 are not joined.

[0091] Therefore, as shown in Figures 6(B) and (C), the portion of each folding auxiliary portion 50 closer to the base edge than the sewn-on joint 55 can be separated from the bottom-side auxiliary portion forming portion 52 and the second side-side auxiliary portion forming portion 56 under the constraint of the sewn-on joints 54 on a pair of oblique sides. As shown in FIG. 6(B), the bottom auxiliary portion forming portion 52 and the second side auxiliary portion forming portion 56 are spaced apart, so that an internal space is formed in each folding auxiliary portion 50. The internal space formed in each folding assisting portion 50 communicates with the internal space formed by the outer case bottom portion 32, both outer case first side portions 34, and both outer case second side portions 36.

[0092] Next, the lid 60 will be described in detail with reference to FIGS. 2A to 2C and the like. As described above, the cover 60 has the main body 61, the attachment piece 62, and the bent piece 65, and is detachably coupled to the outer case 30 at the attachment piece 62 (FIGS. 1A and 1B). The main body 61 of the lid body 60 has a rectangular thick plate shape corresponding to the opening (Figure 1B(a), Figure 2A) of the outer case body 30 (basic state), and both have a pair of long and short sides. The main body 61 is formed by covering a thick plate-shaped heat insulating material with a sheet-shaped cover made of synthetic resin.

[0093] 2A to 2C, the attachment piece 62 is formed on the edge of one long side of the main body 61 of the lid 60. The bent piece 65 is formed on the edge of the other long side of the main body 61. Both extend a short distance from the upper edge of the end face forming the edge of the long side of the main body portion 61 (the upper edge in the closed position in FIG. 1A).

[0094] The attachment piece 62 and the bent piece 65 are in the form of a flexible sheet. As mentioned above, the main body 61 of the lid body 60 is formed by covering a thick plate-like insulating material with a sheet-like cover made of synthetic resin, and the attachment piece 62 and the folding piece 65 are formed integrally with the main body 61 of the lid body 60 by the cover.

[0095] The attachment piece 62 is capable of swinging (rotating) relative to the main body 61 of the lid 60 at its base edge. When the main body 61 is kept horizontal so that it is virtually always in the closed position (Figure 1A), the attachment piece 62 can be changed relative to the main body 61 between a position in which it extends vertically from the upper edge of the edge of the main body 61 downward to the main body 61, and a position in which it extends horizontally along the top surface of the main body 61 (a position extending in the opposite direction to the natural position), with the position (natural position) in which it extends horizontally continuously with the top surface of the main body 61. Both surfaces of the attachment piece 62 are provided with hook-and-loop fasteners (female) (not shown).

[0096] The bent piece 65 is also capable of swinging (rotating) relative to the main body 61 of the lid 60 at its base edge. As described above, the bent piece 65 can also be changed relative to the main body 61 between a position in which it extends vertically from the upper edge of the edge of the main body 61 downward to the main body 61, and a position in which it extends horizontally along the top surface of the main body 61 (a position extending in the opposite direction to the natural position), with the main body 61 always kept virtually horizontal. As shown in FIGS. 1B(b), 2B, and 2C, a hook-and-loop fastener (female) 66 is provided on the inner surface of the bent piece 65.

[0097] Next, the connection relationships between the elements will be described. As shown in FIGS. 1B and 2A, the size (outside dimensions) of the inner case body 10 corresponds to the size (inside dimensions) of the interior of the outer case body 30. That is, the width (external dimension in the width direction) and depth (external dimension in the depth direction) of the inner case body 10 are slightly shorter than the internal dimensions in the width direction and the internal dimensions in the depth direction of the outer case body 30. The height (external dimension in the height direction) of the inner case body 10 is approximately the same as the internal dimension in the height direction of the outer case body 30 minus the thickness of the main body 61 of the lid body 60. In this way, the inner case body 10 is accommodated inside (inside space of) the outer case body 30 with almost no gaps.

[0098] 2A, a hook-and-loop fastener (male) 44 is provided near the upper edge of the inner surface of each outer case first side portion 34 of the outer case body 30. Correspondingly, a hook-and-loop fastener (female) 24 is provided near the upper edge of each first side portion of the inner case body 10. In this way, with the inner case body 10 housed almost tightly inside (internal space) of the outer case body 30 (Figure 1B), the hook-and-loop fastener (male) 44 and the hook-and-loop fastener (female) 24 are joined, and the inner case body 10 is detachably joined to the outer case body 30.

[0099] As shown in FIGS. 2A to 2C, a clamping piece 45 is provided on the upper edge of the inner surface of the outer case first side portion 34 on one side (back side) of the outer case body 30 and in the vicinity thereof. The clamping piece 45 is in the form of a strip-like sheet extending over the entire width of the outer case body 30, and its base edge is joined to the vicinity of the upper edge of the inner surface of the first side portion 34 of the outer case. The clamping piece 45 can swing (rotate) at its base end relative to the outer case first side portion 34, and in its natural position (along with the outer case first side portion 34), its upper edge is located at approximately the same height as the upper edge of the outer case first side portion 34. A hook-and-loop fastener (male) (not shown) is provided on each of the clamping piece 45 and the outer case first side portion 34 at portions that face each other.

[0100] The lid body 60 is detachably connected to the outer case body 30 (the upper edge portion of the back side thereof) at the attachment piece 62. Before the inner case body 10 is housed inside the outer case body 30, the attachment piece 62 is inserted between the clamping piece 45 and a portion of the outer case first side portion 34 that faces the clamping piece 45, and is clamped by them. In this state, the hook-and-loop fasteners (female) (described above) provided on both sides of the attachment piece 62 are joined to the hook-and-loop fasteners (male) (described above) provided on the clamping piece 45 and the outer case first side portion 34 in portions that face each other. In this way, the lid body 60 is detachably connected at the attachment piece 62 to the upper edge portion and its vicinity on the inner surface of one of the outer case first side portions 34 of the outer case body 30 . With the inner case body 10 housed inside the outer case body 30, the clamping pieces 45 are maintained in their natural position by the inner case body 10.

[0101] As described above, with the clamping piece 45 maintained in its natural position by the inner case body 10, the lid body 60 (excluding the attached piece 62) can swing (open and close) with the base edge of the main body part 61 as the reference. In this way, the cover 60 is displaceable between the closed position (FIG. 1A) and the inverted position (FIG. 5C). The "closed position" is a position in which the cover 60 is horizontal, as shown in FIG. 1A, and closes the opening (FIG. 1B(a)) of the item storage case (outer case body 30). The "inverted position" is a position in which the cover 60 is opened from the closed position, goes beyond the position facing vertically upward, and faces vertically downward along the outer surface of the outer case first side portion 34, as shown in FIG. 5C. As shown in FIG. 1B and other figures, a position other than the closed position where the opening (FIG. 1B(a)) of this item housing case (outer case body 30) is open is referred to as an "open position." When the cover 60 is in the closed position (FIG. 1A), the main body 61 of the cover 60 and the upper surface of the inner case body 10 come into contact with each other, thereby improving airtightness.

[0102] 1B and 2A, a hook-and-loop fastener (male) 46 is provided along the entire width of the outer case body 30 near the upper edge of the outer case first side portion 34 on the front side of the outer case body 30. The hook-and-loop fastener (male) 46 corresponds to the hook-and-loop fastener (female) 66 (FIG. 1B) of the bent piece 65 of the lid body 60. Then, with the cover body 60 in the closed position, the bent piece 65 is bent perpendicular to the main body 61 so as to face vertically downward, and the hook-and-loop fastener (male) 46 and the hook-and-loop fastener (female) 66 are joined, whereby the bent piece 65 is detachably joined to the outer case first side portion 34 on the front side of the outer case body 30. In this way, the cover 60 is maintained in the closed position as shown in FIG. 1A.

[0103] 1A(b), a hook-and-loop fastener (male) 47 is also provided on the lower portion of the outer case first side portion 34 on the back side of the outer case body 30. The hook-and-loop fastener (male) 47 also corresponds to the hook-and-loop fastener (female) 66 on the bent piece 65 of the lid body 60. Then, as shown in Figures 5B and 5C, when the cover body 60 is in an inverted position and the bent piece 65 is bent relative to the main body 61 so that it faces vertically upward, the hook-and-loop fastener (male) 47 and the hook-and-loop fastener (female) 66 are joined (Figure 5B(b)), whereby the bent piece 65 is detachably joined to the outer case first side portion 34 on the back side of the outer case body 30. In this way, the cover 60 is maintained in the inverted position as shown in FIG. 5C.

[0104] As shown in FIGS. 1A to 2A, etc., a connecting belt 90 and a connected piece 95 are provided on each outer case second side portion 36 of the outer case body 30. The connecting belt 90 has its base end connected to one side edge at approximately the center height position of the outer case second side portion 36. A hook-and-loop fastener (female) 91 is provided on the back surface of the connecting belt 90. The joinable piece 95 has its base end joined to the other side edge at approximately the center height position of the outer case second side portion 36. A hook-and-loop fastener (male) 96 is provided on the front surface of the joinable piece 95.

[0105] As also shown in FIGS. 1A to 2A, etc., the article storage case is provided with a gripping belt 80. A support belt 82 is provided on the upper portion of each outer case second side portion 36 of the outer case body 30. The support belt 82 extends horizontally and is basically joined to the outer case second side portion 36 at its upper and lower edges by sewing. A portion of the connecting belt 90 is connected to the second side portion 36 of the outer case by sewing at two pairs of sewn portions 83 extending in the width direction (vertical direction) of the connecting belt 90 corresponding to the width of the gripping belt 80. Between each pair of sewn portions 83, the upper and lower edges of the support belt 82 are not sewn to the second side portion 36 of the outer case. Thus, a pair of belt insertion portions 84, both of which correspond to the width of the gripping belt 80, are formed on each outer case second side portion 36.

[0106] The gripping belt 80 is slidably inserted through both belt insertion portions 84 of both outer case second side portions 36, and is looped as a whole and connected to the lower surface of the outer case bottom sheet 31. The portions of the gripping belt 80 above the pair of belt insertion portions 84 on each outer case second side portion 36 serve as gripping portions 81.

[0107] Next, the method of use and the effects of this item storage case will be described with reference to FIGS. 5A to 7 and other figures. This item storage case is in a basic state (FIG. 1A) when storing an item, and is in a folded state (FIG. 5C) when not storing an item.

[0108] To transform from the base state to the folded state, the following is done: First, in the basic state, as shown in FIG. 5A(1), each folding assisting part 50 is removed from the outer case second side part 36 and placed in a substantially horizontal position. Also, as shown in FIG. 5A(2), the cover 60 is removed from the closed position and placed in the inverted position (or a position close to it).

[0109] Next, as shown in Figures 5A → 5B → 5C and 7(A) → (C), the outer case body 30 and the inner case body 10 are operated to change the inner case body 10 from the basic state (Figure 2A) to the folded state (Figure 2C). At this time, the outer case body 30 is flexible and has the folding assist section 50, so it follows the phase change of the inner case body 10 and changes from the basic state (Figure 2A) to the approximately folded state (Figure 2C).

[0110] That is, as shown in Figures 2A → 2B → 2C and 7(A) → (C), when the inner case body 10 gradually changes from the basic state to the folded state, the first side plate portions 14 of the inner case move closer to each other, and the depth of the inner case body 10 (the depth dimension of this item storage case) becomes shorter, while the inner case bottom plate portion 12 changes downward in a valley fold shape, and the inner case body 10 (inner case bottom plate portion 12) extends downward. In this way, the inner case body 10 changes phase inside the outer case body 30, and the folding assisting parts 50 act effectively to change phase of the outer case body 30 in accordance with this change.

[0111] As shown in Figures 7(A) to (C), when the pair of divided bottom plate portions 13 attempt to move in a direction having a vertical downward component and the inner case body 10 (inner case bottom plate portion 12) attempts to extend downward, the pair of divided bottom plate portions 13 press downward on the outer case bottom portion 32 of the outer case body 30, causing the outer case bottom portion 32 of the outer case body 30 to also attempt to descend downward in an approximately valley-folded manner. As mentioned above, in each folding auxiliary portion 50, each bottom side auxiliary portion forming portion 52 (Figure 4) and each second side side auxiliary portion forming portion 56 (Figure 4) are not joined except at the sewn joint portion 54 and the sewn joint portion 55, so that the bottom side auxiliary portion forming portion 52 and the second side side auxiliary portion forming portion 56 can be separated in the portion of each folding auxiliary portion 50 closer to the base edge than the sewn joint portion 55. Therefore, as described above, when the inner case body 10 changes phase and the outer case bottom 32 attempts to descend in an approximately valley fold manner, each folding auxiliary portion 50 is pulled downward, and as shown in Figure 6(A) → (C), the portions of the bottom side auxiliary portion forming portion 52 and the second side side auxiliary portion forming portion 56 of each folding auxiliary portion 50 that are closer to their own base edge than the sewn joint portion 55 descend while moving away from each other. In this way, when the inner case bottom plate portion 12 tries to extend downward as shown in FIG. 7(A)→(C), the outer case bottom portion 32 smoothly descends downward in a generally valley-folded shape. In this way, the outer case body 30 does not prevent the inner case body 10 from changing phase toward the folded state, and the inner case body 10 smoothly assumes the folded state.

[0112] Furthermore, if the folding assist part 50 is too large (i.e., there is too much slack), the phase change of the folding assist part 50 itself will not proceed smoothly, which will hinder the smooth phase change of the outer case body 30, and ultimately will prevent the phase change of the entire item storage case from proceeding smoothly. However, in this item storage case, the shape of the folding auxiliary portion 50 (bottom side auxiliary portion forming portion 52, second side side auxiliary portion forming portion 56) is an isosceles triangle, and the width gradually narrows as it moves from the base edge toward the tip end, so this does not happen, and as shown in Figure 5B, the folding auxiliary portion 50 changes phase smoothly, and the outer case body 30, and ultimately this item storage case, changes phase smoothly.

[0113] When the inner case bottom plate 12 is stretched downward to the maximum extent (i.e., when the inner case bottom plate 12 is bent), the portion of the second side auxiliary part forming part 56 closer to the base edge than the sewn joint part 55 and the portion of the bottom auxiliary part forming part 52 closer to the base edge than the sewn joint part 55 are in a substantially vertical state, continuous with the outer case second side part 36. This state is the limit of downward stretch of the outer case body 30. Conversely, the outer case body 30 can extend downward until it reaches this state, and in this state, the inner case bottom plate portion 12 is in a folded state (the inner case body 10 is in a folded state). The sewn joint portion 55 is provided at such a position.

[0114] Even if the sewn joint 54 is located closer to the tip of the folding assist part 50 than the above-mentioned position, or even if the sewn joint 54 is not located at all, the item storage case can still be transformed from the basic state to the folded state. However, the provision of sewn connection portion 54 at the above-mentioned position means that, under the condition that the item storage case can be folded, sewn connection portion 54 is provided at a position of folding aid portion 50 closest to the base edge portion. This prevents bottom-side auxiliary portion-forming portion 52 and second side-side auxiliary portion-forming portion 56 in folding aid portion 50 from being too far apart, and prevents folding aid portion 50 from undergoing irregular phase deformation.

[0115] In this way, the outer case body 30 does not prevent the inner case body 10 from changing into the folded state, and when the inner case body 10 tries to change into the folded state, the outer case body 30 also follows and tries to change into the approximately folded state smoothly. In this way, the container case smoothly changes into the folded state.

[0116] As described above, the inner case body 10 and the outer case body 30 are transformed into a folded state and a nearly folded state, and at some point, the lid body 60, which is in an inverted position (or a position close to it), is fixed to the outer surface of the second side portion 36 of the outer case, as shown in Figures 5B and 5C. Similarly, as shown in FIG. 5B and FIG. 5C, the joining belt 90 is attached to the joining piece 95 to maintain the folded state of the article storage case.

[0117] In this manner, the container case can be easily transformed from the basic state to the folded state.

[0118] Moreover, by performing the reverse operation described above, it is also possible to easily transform the folded state into the basic state. That is, as shown in FIG. 5C→FIG. 5B, the joining belt 90 is removed from the joined piece 95. 5C, 5B, and 5A, by attempting to change the phase of inner case body 10 from the folded state toward the base state, outer case body 30 also attempts to change its phase from the approximately folded state toward the base state. At this time, auxiliary piece forming portions 52 and 56 of each folding assisting portion 50 move closer to each other. At some point, as shown in Figure 5C → Figure 5B, the lid body 60, which is in the inverted position and fixed to the outer surface of the outer case second side portion 36, is removed from the outer surface of the outer case second side portion 36 and positioned in a closed position, etc. In this way, the container case can be easily transformed from the folded state to the basic state.

[0119] [Example 2] Next, an article storage case according to a second embodiment of the present invention will be described with reference to FIGS. Example 2 is a further improvement of Example 1, and the following description will focus on the differences from Example 1. Elements common to Example 1 will be given the same reference numerals and detailed descriptions will be omitted where appropriate.

[0120] As shown in FIGS. 9A to 9C and the like, this article storage case is also a double-structured case having an inner case body 10 and an outer case body 30 as well as a lid body 260, similar to the first embodiment. This item storage case is also foldable, and can be transformed between a basic state (FIG. 8A) in the shape of a rectangular parallelepiped and a folded state (FIG. 11C). Similarly, the cover 260 can be opened and closed, and can be displaced between a double-edge coupled state (FIG. 8A) and a single-edge coupled state (FIG. 8B). Furthermore, cover 260 is bendable and can be transformed between a flat state (FIGS. 8A to 9A, 11A) and a bent state (FIGS. 9C, 11C). In this respect, this article storage case differs from Example 1.

[0121] The "basic state" of this item storage case is, as in Example 1, a state in which the inner case body 10 is in a basic state in which it is a rectangular parallelepiped (inner case basic state), the outer case body 30 is also in a basic state in which it is a rectangular parallelepiped (outer case basic state), and the lid body 260 is in a basic state (lid body basic state), as shown in Figures 8A, 9A, 11A, and 12(A). The "basic state (basic state of the lid)" of the lid 260 is a state in which it is in a straight plate state and both edges are joined together.

[0122] The "folded state" of this item storage case is a state in which the inner case body 10 is in a folded state (inner case folded state), the outer case body 30 is in an approximately folded state (outer case approximately folded state) corresponding to the inner case body 10 in the folded state (the above is the same as in Example 1), and the lid body 260 is in a state in which both edges are joined and folded (lid body both edges are joined and folded state), as shown in Figures 9C, 11C, and 12(C). The "both edges joined and folded state" of the cover 260 refers to a state in which the cover 260 is folded and also in a state in which the both edges are joined.

[0123] As described above, the cover 260 can be opened and closed, and can be displaced between a double-edge coupled state (FIG. 8A) and a single-edge coupled state (FIG. 8B) (this is the same as in the first embodiment). The "both-edges bonded state" is a state in which the lid body 260 is bonded to the outer case body 30 at both edges of its pair of long sides, as shown in Figure 8A, and the "single-edge bonded state" is a state in which the lid body 260 is bonded to the outer case body 30 at only one edge of its pair of long sides, and is detached from the outer case body at the other edge, as shown in Figure 8B.

[0124] Also, as mentioned above, unlike in Example 1, the lid 260 is bendable and can be transformed between a flat state (FIGS. 8A to 9A, 11A) and a bent state (FIGS. 9C, 11C). The "flat state" refers to a state in which the sheet is not folded but forms a single flat plate (one flat plate) as a whole, as shown in Figures 8A to 9A and 11A. The "folded state" refers to a state in which the sheet is folded into an inverted V shape (an inverted V shape in the above-mentioned edge-joined state), as shown in Figures 9C and 11C.

[0125] As in Example 1, the inner case body 10 is capable of changing between a basic state (inner case basic state) (FIGS. 9A, 12(A)) and a folded state (inner case folded state) (FIGS. 9C, 12(C)).

[0126] The "basic state (inner case basic state)" of the inner case body 10 is a state in which, as shown in Figures 9A and 12(A), a pair of inner case first side plate portions 14 are in a separated state (first side wall portion separated state), and both the inner case bottom plate portion 12 and the inner case second side plate portion 16 are in a basic state (bottom plate portion basic state, second side plate portion basic state).

[0127] The "separated state (first side plate portion separated state)" of a pair of inner case first side plate portions 14 is a state in which the inner case first side plate portions 14 are furthest apart from each other, as shown in Figures 9A and 12(A). The "basic state (basic state of bottom plate portion)" of the inner case bottom plate portion 12 is a state in which the entire bottom plate portion 12 forms a flat plate (one flat plate) and extends horizontally and perpendicular to both inner case first side plate portions 14, as shown in Figures 9A and 12(A). The "basic state (basic state of second side plate portion)" of the inner case second side plate portion 16 is a state in which both divided side plate portions 17 form a single flat plate (one flat plate) as a whole, and are perpendicular to both inner case first side plate portions 14, as shown in Figures 9A and 12(A).

[0128] The "folded state (inner case folded state)" of the inner case body 10 is a state in which, as shown in Figures 9C and 12(C), a pair of inner case first side plate portions 14 are in a close proximity state (first side wall portions in a close proximity state), and both the inner case bottom plate portion 12 and the inner case second side plate portion 16 are in a folded state (bottom plate portion folded state, second side plate portion folded state).

[0129] The "close state (first side plate portion close state)" of a pair of inner case first side plate portions 14 is the state in which the first side plate portions 14 of both inner cases are closest to each other, as shown in Figures 9C and 12(C). The "folded state (bottom plate portion folded state)" of the inner case bottom plate portion 12 is a state in which each divided bottom plate portion 13 faces vertically downward (hangs down) from the corresponding inner case first side plate portion 14 and both divided bottom plate portions 13 overlap each other, as shown in Figures 9C and 12(C). It should be noted that there may be cases where each divided bottom plate portion 13 extends substantially vertically and both divided bottom plate portions 13 are close to each other but do not overlap (are not in surface contact). The "folded state (second side plate portion folded state)" of the inner case second side plate portion 16 is a state in which, as shown in Figure 9C, the outer surfaces (outer surfaces in the basic state) of the two divided bottom plate portions 13 face each other and overlap, are parallel to the two inner case first side plate portions 14, and overlap with the two inner case first side plate portions 14 between them. In addition, there are also cases where both divided side plate portions 17 extend inward approximately parallel to both inner case first side plate portions 14, and between both inner case first side plate portions 14, the both inner case first side plate portions are close to each other but do not overlap (without surface contact), and extend approximately along both inner case first side plate portions 14.

[0130] As in Example 1, the outer case body 30 can be transformed between a basic state (outer case basic state) (Figures 9A, 12(A)) and an approximately folded state (outer case approximately folded state) (Figures 9C, 12(C)). As shown in FIG. 9A and FIG. 12(A), the basic state of the outer case body 30 (outer case basic state) corresponds to the basic state of the inner case body 10 (inner case basic state). As shown in FIG. 9C and FIG. 12(C), the substantially folded state of the outer case body 30 (outer case substantially folded state) corresponds to the folded state of the inner case body 10 (inner case folded state).

[0131] The "basic state (outer case basic state)" of the outer case body 30 is a state in which the pair of outer case first side portions 34 are in a separated state (first side separated state), and both the outer case bottom portion 32 and the outer case second side portion 36 are in a basic state (bottom basic state and second side basic state), as shown in Figures 9A and 12(A). The "separated state (first side separated state)" of the pair of outer case first side portions 34 refers to a state in which the outer case first side portions 34 are the furthest apart from each other. The "basic state (basic state of bottom portion and basic state of second side portion)" of the outer case bottom portion 32 and the outer case second side portion 36 refers to a state in which both are in a planar natural state.

[0132] The "substantially folded state (outer case substantially folded state)" of the outer case body 30 is the following state, as shown in FIG. 9C and FIG. 12(C). The pair of outer case first side portions 34 correspond to the two inner case first side plate portions 14 that are in close proximity to each other, and the two outer case first side portions 34 are in a state where they are quite close to each other. The outer case bottom portion 32 is in a state where it is folded in a generally valley-like shape (FIG. 12(C)) corresponding to the folded inner case bottom plate portion 12. The outer case second side portion 36, together with the folding assisting portion 50 which is substantially vertical, is in a bent state corresponding to the bent inner case second side plate portion 16.

[0133] 9A to 10, the lid 260 has a main body 61, an attachment piece 62, and a bent piece 65, similar to the lid 60 of Example 1. The main body 61 of the lid 260 is formed by covering a thick plate-like heat insulating material with a sheet-like cover made of synthetic resin.

[0134] As shown in Figure 9A, the main body 61 of the lid body 260 has a rectangular thick plate shape corresponding to the opening (Figure 8B(a), Figure 9A) of the outer case body 30 (basic state), and both have a pair of long sides (first side of the lid body) and short sides (second side of the lid body). That is, the long side (first lid side) and short side (second lid side) of the main body portion 61 of the lid body 260 correspond to the long side (first bottom plate side) and short side (second bottom plate side) of the inner case bottom plate portion 12 of the inner case body 10, respectively.

[0135] The dimensions of the long side (first side of the lid) and short side (second side of the lid) of the main body 61 of the lid 260 are as follows. The long side (first lid side) of the main body 61 of the lid 260 is the same size as the long side (first bottom side) of the inner case bottom plate 12 of the inner case body 10, and is the same size as the long side (width) of the inner case first side plate 14. The short side (second side of the lid) of the main body 61 of the lid 260 has a dimension equal to the short side (second side of the bottom plate) of the inner case bottom plate 12 of the inner case body 10 plus the thickness of the pair of inner case first side plate portions 14, and has a dimension equal to the short side (width) of the inner case second side plate portion 16 plus the thickness of the pair of inner case first side plate portions 14. For this reason, as described above, both of the pair of inner case first side plate portion 14 and inner case second side plate portion 16 of the inner case body 10 are thick plate-shaped, and a rectangular frame having a predetermined width is formed on the upper end surface of the inner case body 10, and the main body portion 61 (its edge portion) of the lid body 260 corresponds to the outer peripheral edge of that rectangular frame.

[0136] 9A to 9C, similar to the first embodiment, the attachment piece 62 is formed on the edge of one long side of the main body 61 of the lid 260. The bent piece 65 is formed on the edge of the other long side of the main body 61. Both pieces extend a short distance from the upper edge of the end face forming the edge of the long side of the main body 61 (the upper edge in the closed position in FIG. 8A). The attachment piece 62 is capable of swinging (rotating) at its base edge relative to the main body 61 of the lid 260 (the boundary between them is bendable). The bent piece 65 is also capable of swinging (rotating) at its base edge relative to the main body 61 of the lid 260 (the boundary between them is bendable).

[0137] The cover 260 is connected to the outer case 30 in the same manner as in the first embodiment, as described below, and is phase-transformable between a one-edge connected state (FIG. 8B) and a two-edge connected state (FIG. 8A).

[0138] 8A to 9C, the cover 260 is detachably coupled to the outer case body 30 at the attachment piece 62 (FIGS. 9A to 9C) (FIGS. 8A and 8B). That is, before the inner case body 10 is housed inside the outer case body 30, the attachment piece 62 is inserted between the clamping piece 45 and the outer case first side portion 34 (the portion thereof facing the clamping piece 45) (FIGS. 9A to 9C), and hook-and-loop fasteners (female) provided on both sides of the attachment piece 62 are coupled to hook-and-loop fasteners (male) (described above) provided on the mutually facing portions of the clamping piece 45 and the outer case first side portion 34. As a result, as shown in FIG. 8B, the cover 260 is in a state where at least one edge is joined.

[0139] 8A, the lid body 260 is detachably coupled to the outer case first side portion 34 on the front side of the outer case body 30 at the bending piece 65. That is, with the lid body 260 in the closed position, the bending piece 65 is bent perpendicular to the main body portion 61 so as to face vertically downward, and the hook-and-loop fastener (male) 46 (FIG. 8B) and the hook-and-loop fastener (female) 66 (FIG. 8B) are coupled together, whereby the bending piece 65 is detachably coupled to the outer case first side portion 34 on the front side of the outer case body 30. As a result, the lid body 260 is brought into a state in which both edges are joined together, as shown in FIG. 8A.

[0140] As described above in Example 1, the height (external dimension in the height direction) of the inner case body 10 is approximately the same as the internal dimension in the height direction of the outer case body 30 minus the thickness of the main body portion 61 of the lid body 60. Therefore, the upper surface of the main body 61 of the lid 60 and the upper edge of the outer case 30 are at approximately the same height.

[0141] 9A to 10, the main body 61 of the lid 260 has a pair of split lids 262 split along a lid folding line 261. The lid folding line 261 connects the centers of both short sides of the main body 61 of the lid 260 and extends in the direction of the long side of the main body 61. The split lid bodies 262 are connected to each other at the lower edges of the end faces of the split lid bodies 262 that face each other so as to be able to swing (rotate) relative to each other.

[0142] More precisely, the lid folding line 261 is a portion that connects the lower edges, and the main body 61 of the lid 260 is divided into a pair of split lids 262 by a plane that includes the lid folding line 261. The split lids 262 are connected at the lid folding line 261 so that they can be folded upward in a mountain fold (upward when both edges are joined). Therefore, the main body 61 of the lid 260 can be folded upward at the lid folding line 261 (upward when both edges are joined) in a mountain fold shape.

[0143] As described above, the main body 61 of the lid 260 is formed by covering a thick plate-like heat insulating material with a sheet-like cover made of synthetic resin, and this will be described in detail as follows. The insulating material is divided into a pair of insulating segments corresponding to each of the divided lid bodies 262, and both insulating segments are covered with a cover so that both of the divided lid bodies 262 can swing as described above. This also applies to the inner case bottom plate portion 12 (embodiments 1 and 2) and the inner case second side plate portion 16 (embodiments 1 and 2).

[0144] As described above, the boundary portion between the main body portion 61 and the attachment piece 62 of the lid body 260 can be bent, and similarly, the boundary portion between the main body portion 61 and the bendable piece 65 can also be bent. Therefore, in the state where both edges are joined, the lid 260 is inherently swingable (rotatable) relative to the upper edge of the outer case body 30 at each long side (first lid side) of the main body 61.

[0145] Thus, the cover 260 (its main body 61) can be transformed between a flat state (FIGS. 9A and 12A) and a bent state (FIGS. 9C and 12C) even when both edges are joined.

[0146] The "flat state" of the lid body 260 refers to a state in which the entire body forms a single flat plate (one flat plate), as shown in FIG. 9A. As described above, the basic state (lid basic state) is when both edges are joined and the lid is in a flat state. That is, the "basic state (lid basic state)" of the lid 260 is a state in which the lid 260 forms a single flat plate (a single flat plate) as a whole, extends horizontally and perpendicular to both inner case first side plate portions 14, and is in the closed position, as shown in Fig. 9A.

[0147] The "folded state" of the lid 260 is a state in which it is folded along the lid folding line 261, as shown in FIG. 9C. In the state where both edges are joined and folded, the cover body 260 is folded upward in an inverted V shape, i.e., in a convex fold, and each divided cover body 262 extends diagonally upward from the corresponding inner case first side plate portion 14 and is connected to each other by the cover body folding line 261.

[0148] The lid body 260 (its main body portion 61) is in a flat state with the edges of the two split lid bodies 262 opposite the lid body folding line 261 separated as far as possible, and changes into a folded state as the edges approach each other. Thus, when the outer case body 30 is in the basic state (outer case basic state) (Figure 9A), the lid body 260 (its main body part 61) is in a flat state, and when the outer case body 30 is in an approximately folded state (outer case approximately folded state) (Figure 9C), the lid body 260 (its main body part 61) is in a folded state.

[0149] Magnets 263a and 263b may be embedded near the opposing portions of each divided cover 262. In this case, the opposing portions of the magnets 263a and 263b have different polarities (one is a north pole and the other is a south pole). In this case, the cover 260 (its main body 61) can be easily maintained in a flat state.

[0150] Next, the method of use and the effects of this item storage case will be described with reference to Figures 8A and 11A to 11C. In the following, the differences from Example 1 will be mainly described, and the same points as Example 1 will not be described in detail. This item storage case is in a basic state (FIG. 8A) when storing an item, and is in a folded state (FIG. 11C) when not storing an item.

[0151] To transform from the base state to the folded state, the following is done: First, in the basic state, as shown in FIG. 11A, each folding assisting part 50 is removed from the outer case second side part 36 and placed in a substantially horizontal position. At this time, unlike in the first embodiment, no operation is performed on the lid body 260, and both edges are maintained in the joined state.

[0152] Next, as shown in Fig. 11A → Fig. 11B → Fig. 11C, the outer case body 30 and the inner case body 10 are operated to change the state of the item housing case from the basic state (Fig. 11A) to the folded state (Fig. 11C).

[0153] As shown in Figures 11A to 11B, by pressing both outer case second side portions 36 of the outer case body 30 inward so that the central portions in the width direction (depth direction of this item storage case) of the outer case body 30 move slightly closer to each other, both inner case second side plate portions 16 (their central portions in the width direction) are pressed inward (pressed via both outer case second side portions 36) so that the second side plate portion fold lines 15 of both inner case second side plate portions 16 of the inner case body 10 (Figure 9A) move slightly closer to each other. Thus, as shown in Figures 9A to 9B, the inner case body 10 undergoes a slight phase change from the basic state (inner case basic state) (Figure 9A) toward the folded state (inner case folded state) (Figure 9C), while the outer case body 30 also undergoes a slight phase change from the basic state (outer case basic state) (Figure 9A) toward the approximately folded state (outer case approximately folded state) (Figure 9C). That is, the pair of inner case first side plate portions 14 of the inner case body 10 change phase slightly from a spaced apart state (first side plate portion spaced apart state) (Figure 9A) to a close together state (first side wall portion close together state) (Figure 9C), while the pair of outer case first side portions 34 of the outer case body 30 move slightly closer to each other from a spaced apart state (first side portion spaced apart state) (Figure 9A). Accordingly, the cover 260 (its main body 61) undergoes a slight phase change from the flat state (FIG. 9A) to the bent state (FIG. 9C). That is, the lid folding line 261 of the lid 260 is displaced upward, and the lid 260 (its main body 61) is folded slightly upward in an inverted V shape, that is, in a mountain fold (convex shape).

[0154] Furthermore, as shown in Figures 11B to 11C, by pressing both outer case first side portions 34 of the outer case body 30 inward so that they approach each other, both inner case first side plate portions 14 of the inner case body 10 (Figure 9B) are pressed inward so that they approach each other. In this way, the inner case body 10 changes into the folded state (inner case folded state) (FIG. 9C), and the outer case body 30 also changes into the approximately folded state (outer case approximately folded state) (FIG. 9C). Accordingly, the cover 260 (its main body 61) changes into a folded state (FIG. 9C). That is, the lid folding line 261 of the lid 260 is further displaced upward, and the lid 260 (its main body 61) is folded into an inverted V shape to the maximum extent, that is, folded upward into a mountain fold (convex shape) to the maximum extent.

[0155] In this way, the item storage case can be easily transformed from the basic state (FIG. 11A) to the folded state (FIG. 11C).

[0156] Moreover, by performing the reverse operation described above, it is also possible to easily transform the folded state (FIG. 11C) back to the base state (FIG. 11A).

[0157] As described above, in this item storage case, the lid body 260 can be transformed between the basic state and the folded state while the edges thereof remain joined, so that the case can be transformed from the basic state to the folded state even more easily than in Example 1, and conversely, the case can be transformed from the folded state to the basic state. That is, in Example 1, in the basic state, the edges are joined at both ends as shown in Figures 1A and 5A(1), but in other states, it is necessary to join one edge and position it in the inverted position as shown in Figures 5A(2) to 5C, but this effort can be eliminated.

[0158] Furthermore, in Example 1, as shown in Figure 5C, in the folded state, the lid body 260 is positioned in an inverted position as described above, and the inner surface of the lid body 260 (its main body portion 61) (the inner surface in the basic state) is exposed to the outside. However, in this item storage case, as shown in Figure 11, this does not happen, and in this respect, this item storage case is also excellent. That is, the inner surface of the lid 260 (its main body 61) faces the items stored inside, but if it is exposed to the outside in the folded state, it may become dirty. In that case, there is a risk that the next time an item is stored, the item will become dirty. However, in this item storage case, even in the folded state, the inner surface of the lid body 260 (its main body portion 61) (the inner surface in the basic state) is not exposed to the outside as in Example 1, so the inner surface is prevented from becoming dirty, and the items stored inside are prevented from becoming dirty.

[0159] [Example 3] Next, an article storage case according to a third embodiment of the present invention will be described with reference to FIGS. The third embodiment is a modification of the second embodiment, and the differences from the second embodiment will be mainly described.

[0160] The main body 61 of the lid body 360 is divided into three parts along a pair of lid body folding lines 361, and has a pair of main divided lid bodies 362 (first side divided lid bodies) and one sub divided lid body 363 (central divided lid body). Each main divided lid body 362 (first side divided lid body) includes the long side (first side of the lid body) of the main body portion 61 of the lid body 360, and the sub divided lid body 363 is located between the two main divided lid bodies 362 and is located in the center of the main body portion 61 of the lid body 360.

[0161] The flat state of the lid body 360 (its main body portion 61) is the same as in the second embodiment, and the entire lid body 360 forms a single flat plate. The folded state of the cover 360 (its main body 61) (folded state when both edges are joined) is such that the main divided cover 362 extends vertically upward and the sub divided cover 363 is horizontal above it. In this way, the cover 360 (its main body 61) is folded upward in a convex shape.

[0162] [Modifications of Examples 1 to 3] As shown in Figures 2A and 9A, the inner case bottom plate portion 12 of Examples 1 to 3 is located below the lower end surfaces of both inner case second side plate portions 16, while being located inside both inner case first side plate portions 14, and the lower surface of the inner case bottom plate portion 12 and the lower end surfaces of both inner case first side plate portions 14 are flush with each other. However, the present invention is not limited to this embodiment, and the following embodiment is also possible.

[0163] Similar to the main body portion 61 (Figure 9A) of the lid body 260 in Examples 2 and 3 (but turned upside down), the lower end surfaces of the first side plate portions 14 of both inner cases and the lower end surfaces of the second side plate portions 16 of both inner cases may be flush, and the inner case bottom plate portion 12 (its edge portion) may correspond to the outer peripheral edge of a rectangular frame having a predetermined width formed by the lower end surfaces of the first side plate portion 14 of the inner case and the second side plate portion 14 of the inner case. That is, the inner case bottom plate portion 12 may be located below the lower end surfaces of both inner case first side plate portions 14 and both inner case second side plate portions 16. In this case, the inner case bottom plate portion 12 swings (rotates) at the upper edge of the end surface of its long side relative to the outer edge of the lower end surface of the inner case first side plate portion 14. Thus, when the item storage case is in the folded state, the inner case bottom plate portion 12 is in a bottom plate folded state, and the pair of divided bottom plate portions 16 of the inner case bottom plate portion 12 are downwardly convex and bent in a V shape.

[0164] [Modifications of Examples 2 and 3] 9A, the main body 61 (its edge) of the lid 260 of Example 2 corresponds to the outer peripheral edge of a rectangular frame having a predetermined width formed by the upper end surfaces of the inner case body 10. In other words, it is located above the upper end surfaces of the inner case first side plate portions 14 and the upper end surfaces of the inner case second side plate portions 16. The same is true for the lid 360 of Example 3. However, the present invention is not limited to this embodiment, and the following embodiment is also possible.

[0165] Similar to the inner case bottom plate portion 12 (Figures 2A, 9A) in Examples 1 to 3 (but turned upside down), the upper end surfaces of both inner case second side plate portions 16 are lower than the upper end surfaces of both inner case first side plate portions 14 by a length corresponding to the thickness of the main body portion 61 of the lid body 260, and the main body portion 61 of the lid body 260 is located above the upper end surfaces of both inner case second side plate portions 16, but is located inside both inner case second side plate portions 16, and the upper surface of the main body portion 61 and the upper end surfaces of both inner case first side plate portions 14 are flush with each other. In this case, the upper edge of the long side of the main body 61 of the lid body 260, 360 swings (rotates) relative to the inner edge of the upper end surface of the inner case first side plate 14. The width of each of the attachment piece 62 and the bent piece 65 of the lid body 260, 360 corresponds to the thickness of the inner case first side plate 14 and is made longer by that amount. Thus, when the article storage case is in the folded state, the lid is in the folded lid state, and the pair of split lids 262 of the lid 260 overlap each other and extend vertically upward.

[0166] It should be noted that the above are merely a few examples of the present invention, and it goes without saying that the present invention can be implemented in various modified forms based on the knowledge of those skilled in the art. [Explanation of symbols]

[0167] 10 Inner case body 11 Bottom plate bending line 12 Inner case bottom plate 13 Split bottom plate section 14 Inner case first side plate portion 15 Second side panel bending line 16 Second side plate of inner case 17 Split side plate part 30 Outer case body 31 Outer case bottom sheet 32 Bottom of outer case 34 Outer case first side 35 Outer case second side sheet 36 Second side of outer case 50 Folding aid 52 Bottom side auxiliary part forming part 55 Sewn joint (joint) 56 Second side auxiliary part forming part 90 Connecting Belt (Belt) 260,360 Lid 261,361 Lid bending line 262 Split lid 362 Main divided lid body (divided lid body), 363 Sub divided lid body (divided lid body)

Claims

1. An article storage case in which an inner case body is housed in an outer case body, the inner case body has an inner case bottom plate portion, a pair of inner case first side plate portions, and a pair of inner case second side plate portions; The bottom plate portion of the inner case is rectangular, each having a pair of first and second bottom plate sides, and has a plurality of divided bottom plate portions divided along bottom plate folding lines extending parallel to the pair of first bottom plate sides. The bottom plate portion is capable of changing between a basic state of the bottom plate portion in a horizontal, flat plate shape and a folded state of the bottom plate portion in which the bottom plate portion is folded convexly downward at the bottom plate folding lines. the pair of inner case first side plate portions are coupled at their lower edges to the pair of first sides of the inner case bottom plate portion so as to be able to swing relative to each other; the pair of inner case second side plate portions correspond to the pair of second sides of the inner case bottom plate portion, and are not joined to the second sides of the inner case bottom plate portion at their lower edges; each side edge of the inner case is connected to each side edge of the pair of inner case first side plate portions so as to be mutually pivotable; The device has a plurality of divided side plate portions divided along second side plate portion bending lines extending in the height direction of the device, and is capable of changing between a base state of the second side plate portion in a flat plate shape and a bent state of the second side plate portion bent inwardly in a convex shape at the second side plate portion bending lines, the inner case body is phase-transformable between an inner case basic state in which the pair of inner case first side plate portions are in a spaced-apart state, the inner case bottom plate portion is in the bottom plate portion basic state, and the pair of inner case second side plate portions are in the second side plate portion basic state, and an inner case folded state in which the pair of inner case first side plate portions are in a close proximity state, the inner case bottom plate portion is in the bottom plate portion folded state, and the pair of inner case second side plate portions are in the second side plate portion folded state, The outer case body is formed of a flexible sheet, and is capable of phase-changing between an outer case basic state corresponding to the inner case basic state of the inner case body and an outer case approximately folded state corresponding to the inner case folded state in accordance with the phase change of the inner case body, without interfering with the phase change of the inner case body between the inner case basic state and the inner case folded state. Item storage case.

2. The item storage case according to claim 1, The multiple divided bottom plate portions are a pair of divided lid bodies in which the inner case bottom plate portion is divided into two along the bottom plate portion bending line, and the folded state of the bottom plate portion is such that the inner case bottom plate portion is bent downward in a valley fold at the bottom plate portion bending line so that both divided bottom plate portions extend approximately vertically.

3. The item storage case according to claim 1 or 2, The multiple divided side plate portions are a pair of divided side plate portions formed by dividing the second side plate portion of the inner case into two along the bending line of the second side plate portion, and the bending state of the second side plate portion is such that the second side plate portion of the inner case is bent inward in a valley fold at the bending line of the second side plate portion, and both divided side plate portions extend approximately along the pair of first side plate portions of the inner case.

4. The item storage case according to claim 1, Further, it has a lid, the lid body has a rectangular lid body main body portion having a pair of lid body first sides extending parallel to the pair of bottom plate first sides and a pair of lid body second sides extending parallel to the pair of bottom plate second sides, the lid body main body is swingable relative to an upper edge portion of the outer case body or the inner case body at the pair of lid body first sides, The container has a plurality of divided lids divided along lid bending lines extending parallel to the pair of lid first sides, and is capable of changing between a lid basic state having a horizontal flat plate shape and a lid folded state in which the lid is folded upward in a convex shape at the lid bending lines, The inner case basic state further includes the lid body main body being in the lid body basic state, and the inner case folded state further includes the lid body main body being in the lid body folded state. Item storage case.

5. The item storage case according to claim 4, The multiple split lid bodies are a pair of split lid bodies in which the lid body main body is split into two along the lid body folding line, and the lid body folded state is such that the lid body main body is folded upward in a mountain fold shape, in this item storage case.

6. The item storage case according to claim 4, The multiple split lid bodies are a pair of first-side split lid bodies and a central-side split lid body in which the lid body main body portion is divided along the multiple lid body folding lines, the pair of first-side split lid bodies including the pair of lid body first sides, and the central-side split lid body being located between the pair of first-side split lid bodies.

7. The article storage case according to any one of claims 1 to 6, the outer case body has an outer case bottom, a pair of outer case first side portions, a pair of outer case second side portions, and a pair of folding assist portions; the outer case first side portion corresponds to the inner case bottom plate portion of the inner case body, the pair of outer case first side portions correspond to the pair of inner case first side plate portions of the inner case body, the pair of outer case second side portions correspond to the pair of inner case second side plate portions of the inner case body, The pair of folding assist parts connect the bottom of the outer case and the second side part of the bottom case, and as the bottom plate part of the inner case tries to change from the basic state of the bottom plate part to the folded state, the pair of divided bottom plate parts of the inner case bottom plate part, which tries to move in a direction having a vertical downward component, presses the bottom of the outer case downward and is pulled downward, thereby extending in a direction having a vertical component between the second side parts of the outer case and the bottom of the outer case, stretching the outer case body downward and allowing the bottom plate part of the inner case to change from the basic state of the bottom plate part to the folded state of the bottom plate part. Item storage case.

8. The item storage case according to claim 7, The pair of folding auxiliary portions are formed by combining bottom-side auxiliary portion forming portions formed integrally with the bottom of the outer case by the sheet forming the bottom of the outer case, and second-side auxiliary portion forming portions formed integrally with the second side of the outer case by the sheet forming the second side of the outer case. Item storage case.

9. The item storage case according to claim 8, the bottom-side auxiliary portion-forming portion has a base edge at a boundary with the bottom of the outer case and extends toward a tip end thereof, the second side auxiliary portion forming portion corresponds to the bottom auxiliary portion forming portion, and extends from a boundary with the second side portion of the outer case as a base edge toward a tip end thereof, the folding auxiliary portion is formed by joining a portion other than the base edge portion of the bottom auxiliary portion forming portion and a portion other than the base edge portion of the second side auxiliary portion forming portion. Item storage case.

10. The item storage case according to claim 9, the bottom-side auxiliary portion-forming portion has a base edge at a boundary with the bottom of the outer case, and the width of the bottom-side auxiliary portion-forming portion gradually narrows toward the tip end thereof, The second side auxiliary portion forming portion has a shape that corresponds to the bottom auxiliary portion forming portion, and has a base edge at a boundary portion with the second side portion of the outer case, and gradually narrows in width toward its tip end. Item storage case.

11. The item storage case according to claim 9, In the folding auxiliary portion, a joining portion is formed by joining a center portion of the bottom auxiliary portion-forming portion and a center portion of the second side auxiliary portion-forming portion, When the inner case body is in the folded state, the portion of the bottom-side auxiliary portion forming portion that is closer to the base edge than the joint portion and the portion of the second side-side auxiliary portion forming portion that is closer to the base edge than the joint portion are in a substantially vertical state continuous with the second side portion of the outer case. Item storage case.

12. The item storage case according to claim 7, Each of the folding assisting parts is detachably coupled to each of the second side parts of the outer case when the item storage case is in the basic state. Item storage case.

13. The item storage case according to claim 7, The outer case body is provided with a belt that detachably connects the pair of outer case first side portions to each other so that they cannot be separated when the item storage case is in the folded state. Item storage case.

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