container

Abstract

To provide stackable containers that can be stably stacked in a folded condition.SOLUTION: In a container 1, a long side base part 3 and a short side base part 4 that are provided along each side of a bottom wall part 2 in an approximately rectangular shape are connected to a long side wall part 7 and a short side wall part 8 via a hinge member 6. A lower corner member 5 that continues to the long side base part 3 and the short side base part 4 are provided corresponding to each corner of the bottom wall part 2. The lower corner member 5 includes a long side cover part 42 that extends along the long side base part 3, and the long side cover part 42 includes a long side regulating part 58 that regulates the relative displacement between the containers 1 when the containers 1 in the folded condition are stacked on each other. The long side regulating part 58 is provided projecting upward from a long side reinforcing part 53 that is thicker than the long side regulating part 58, and the long side reinforcing part 53 extends upward to the position that faces in the horizontal direction at least a part of the thickness range of the short side wall part 8 that is located above the long side wall part 7 in the folded condition of the container 1.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a container that can be folded by tilting its side walls inward. [Background technology]

[0002] Conventionally, as a container used for transporting an article, there is known a container that includes a bottom wall portion having a substantially rectangular shape, a bottom wall component having a base portion provided along each side edge portion of the bottom wall portion, and side wall portions rotatably connected to each base portion, and that can be changed between an assembled state in which each side wall portion is erected above each base portion and forms a box shape that opens upward, and a folded state in which each side wall portion is folded down above the bottom wall portion. In addition, there is a technology for preventing relative displacement between containers in the horizontal direction when containers in the folded state are stacked on top of each other (for example, see Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-34025 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when containers in a folded state are stacked in multiple layers, or when containers stacked in a folded state are transported, there is a concern that the structure for preventing relative horizontal displacement between the containers may be subjected to relatively large forces and become deformed, causing the stacked containers to become unstable (the stacked containers may tilt).

[0005] The present invention has been made to solve the problems exemplified above, and an object of the present invention is to provide containers which can be stably stacked in a folded state. [Means for solving the problem]

[0006] The following describes each of the means suitable for achieving the above objects. Note that, as necessary, the specific effects of the corresponding means will be added.

[0007] Means 1. A device comprising a bottom wall portion having a generally rectangular shape in a plan view, a pair of opposing first base portions extending upward from a pair of opposing first side edges of the bottom wall portion, a pair of opposing second base portions extending upward from a pair of opposing second side edges of the bottom wall portion, a first side wall portion connected to the first base portion via a hinge portion, and a second side wall portion connected to the second base portion via a hinge portion; The first side wall portion and the second side wall portion are configured to be rotatably displaceable between an upright posture in which the first side wall portion and the second side wall portion are erected above the base portions and a folded posture in which the first side wall portion and the second side wall portion are folded above the bottom wall portion, A container capable of changing between an assembled state in which all of the side wall portions are in the upright position and a folded state in which all of the side wall portions are in the folded position, The bottom wall portion, the first base portion, and the second base portion are configured by folding a single resin sheet, a lower corner member provided so as to be continuous with the first base portion and the second base portion in correspondence with each corner of the bottom wall portion; In the folded state, the second side wall portion is in the folded position above the first side wall portion in the folded position, and the containers in the folded state are configured to be stacked vertically in the same orientation, the lower corner member includes a first cover portion that covers the first base portion and at least a portion of the first side wall portion in the upright position from the outer side of the container, a second cover portion that covers the second base portion and at least a portion of the second side wall portion in the upright position from the outer side of the container, and a bottom cover portion that covers a corner of the bottom wall portion from the lower side or from both the lower side and the upper side, the first cover portion includes a first regulating portion for regulating relative displacement of the upper container in a horizontal direction substantially perpendicular to the first side edge portion when the containers in the folded state are stacked on top of each other, and a first reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the first regulating portion; At least a portion of the first restricting portion is provided so as to protrude upward from the first reinforcing portion, and the first reinforcing portion extends upward to a position horizontally opposed to at least a portion of a thickness range of the second side wall portion in the folded state. And, a surface of the first reinforcing portion on an inner side of the container is located on the inner side of the container relative to a surface of the first restricting portion on an inner side of the container, and a part of the first side wall portion is configured to be placed on an upper surface of the first reinforcing portion in the assembled state; the second cover portion includes a second regulating portion for regulating relative displacement in a horizontal direction substantially perpendicular to the second side edge portion of the upper stacked container when the containers in the folded state are stacked on top of each other, and a second reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the second regulating portion; At least a portion of the second regulating portion is provided so as to protrude upward from the second reinforcing portion, and a surface of the second reinforcing portion on an inner side of the container is located on an inner side of the container than a surface of the second regulating portion on an inner side of the container, the first reinforcing portion and the second reinforcing portion are connected, and the first restricting portion and the second restricting portion are connected, In the assembled state, a part of the second side wall portion can be placed on an upper surface of the second reinforcing portion. A container characterized by:

[0008] According to the first aspect, the first cover is provided with the first reinforcing portion, so that the strength and rigidity of the first restricting portion, at least a part of which protrudes upward from the first reinforcing portion, can be increased. In particular, since the first reinforcing portion extends upward to a position that faces in the horizontal direction at least a part of the thickness range of the second side wall portion in the folded state, the first reinforcing portion can be disposed as close as possible to a portion of the first restricting portion that can actually come into contact with the upper container when the folded containers are stacked on top of each other, and the effect of increasing the rigidity of the first restricting portion is more remarkable. Therefore, even if a force acts on the first restricting portion, deformation of the first restricting portion can be suppressed, and the stacked state of the folded containers can be stabilized.

[0010] Also,The upper surface of the first reinforcing portion can support the lower edge portion of the first side wall portion in the upright position. Therefore, the first side wall portion in the upright position can be stabilized, and the assembled state of the container can be stabilized. In addition, the first regulating portion can regulate the outward displacement of the first side wall portion in the upright position toward the container. Note that the first side wall portion and the first reinforcing portion may be configured to abut against each other when the container is simply put into the assembled state, and the first side wall portion may be configured to abut against the first reinforcing portion when a certain degree of downward force is applied to the first side wall portion, such as when another container is stacked above the container in the assembled state.

[0012] moreover, The first and second covering parts cooperate to suppress deformation, and the strength and rigidity of the lower corner member can be increased. In particular, deformation of the first and second restricting parts is more reliably suppressed, and the folded containers can be further stabilized when stacked.

[0013] In addition, the upper surface of the second reinforcing portion can support the lower edge portion of the second side wall portion in the upright position. Therefore, the second side wall portion in the upright position can be stabilized, and the assembled state of the container can be stabilized. Furthermore, the second regulating portion can regulate the outward displacement of the second side wall portion in the upright position toward the container. Note that the second side wall portion and the second reinforcing portion may be configured to abut against each other when the container is simply put into the assembled state, or the second side wall portion may be configured to abut against the second reinforcing portion when a certain degree of downward force is applied to the second side wall portion, such as when another container is stacked above the container in the assembled state.

[0014] means 2 . The device comprises a bottom wall portion having a generally rectangular shape in a plan view, a pair of opposing first base portions extending upward from a pair of opposing first side edges of the bottom wall portion, a pair of opposing second base portions extending upward from a pair of opposing second side edges of the bottom wall portion, a first side wall portion connected to the first base portion via a hinge portion, and a second side wall portion connected to the second base portion via a hinge portion, The first side wall portion and the second side wall portion are configured to be rotatably displaceable between an upright posture in which the first side wall portion and the second side wall portion are erected above the base portions and a folded posture in which the first side wall portion and the second side wall portion are folded above the bottom wall portion, A container capable of changing between an assembled state in which all of the side wall portions are in the upright position and a folded state in which all of the side wall portions are in the folded position, The bottom wall portion, the first base portion, and the second base portion are configured by folding a single resin sheet, a lower corner member provided so as to be continuous with the first base portion and the second base portion in correspondence with each corner of the bottom wall portion; In the folded state, the second side wall portion is in the folded position above the first side wall portion in the folded position, and the containers in the folded state are configured to be stacked vertically in the same orientation, the lower corner member includes a first cover portion that covers the first base portion and at least a portion of the first side wall portion in the upright position from the outer side of the container, a second cover portion that covers the second base portion and at least a portion of the second side wall portion in the upright position from the outer side of the container, and a bottom cover portion that covers a corner of the bottom wall portion from the lower side or from both the lower side and the upper side, the first cover portion includes a first regulating portion for regulating relative displacement of the upper container in a horizontal direction substantially perpendicular to the first side edge portion when the containers in the folded state are stacked on top of each other, and a first reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the first regulating portion; At least a portion of the first restricting portion is provided to protrude upward from the first reinforcing portion, and the first reinforcing portion extends upward to a position horizontally opposed to at least a portion of a thickness range of the second side wall portion in the folded state, In the assembled state, a lower portion of a side edge of the first side wall portion is located closer to a center portion of the first side wall portion in a width direction than an inner surface of the adjacent second side wall portion, and a lower portion of a side edge of the second side wall portion is located closer to a center portion of the second side wall portion in a width direction than an outer surface of the adjacent first side wall portion, The second side wall portion includes a protrusion protruding from a side edge portion of the second side wall portion toward an inner side of the container, A container characterized in that in the folded state, in the width direction of the second side wall portion, a side edge portion of the second side wall portion including the protrusion portion and the first reinforcing portion face each other and abut or are close to each other.

[0015] means 2 According to the above, the first side wall can be rotated and displaced relatively smoothly without interfering with the second side wall in the upright position. Furthermore, in the assembled state, the lower part of the side edge of the second side wall is located closer to the center of the width direction of the second side wall than the outer surface of the adjacent first side wall. In the folded state of the container, the first reinforcing part can be expanded inward of the container to a range located directly below the first side wall in the upright position while maintaining a configuration in which the first reinforcing part and at least a part of the thickness range of the second side wall face each other in the horizontal direction. Therefore, the thickness of the first reinforcing part can be secured as large as possible, and the reinforcing effect by providing the first reinforcing part can be further achieved. In addition, as described in the above-mentioned means 2, the first side wall in the upright position can be configured so that a part of the lower edge part can be placed on the upper surface of the first reinforcing part.

[0017] Also, When the container is in an assembled state, the protrusion can suppress the formation of a gap between the first side wall and the second side wall. In addition, in the folded state of the container, the side edge portion of the second side wall including the protrusion and the first reinforcing portion are configured to face each other and abut or come close to each other in the width direction of the second side wall. This enhances the effect of reinforcing the first restricting portion by extending the first reinforcing portion as far upward as possible, while also increasing the facing area between the first reinforcing portion and the side portion (including the protrusion) of the second side wall in the folded position, thereby stabilizing the folded state of the container. Furthermore, in the width direction of the first side wall, the side edge portion of the first side wall and the inner surface of the second reinforcing portion can be spaced apart, and interference between the first side wall and the second reinforcing portion can be more reliably avoided.

[0018] means 3 . The device comprises a bottom wall portion having a generally rectangular shape in a plan view, a pair of opposing first base portions extending upward from a pair of opposing first side edges of the bottom wall portion, a pair of opposing second base portions extending upward from a pair of opposing second side edges of the bottom wall portion, a first side wall portion connected to the first base portion via a hinge portion, and a second side wall portion connected to the second base portion via a hinge portion, The first side wall portion and the second side wall portion are configured to be rotatably displaceable between an upright posture in which the first side wall portion and the second side wall portion are erected above the base portions and a folded posture in which the first side wall portion and the second side wall portion are folded above the bottom wall portion, A container capable of changing between an assembled state in which all of the side wall portions are in the upright position and a folded state in which all of the side wall portions are in the folded position, The bottom wall portion, the first base portion, and the second base portion are configured by folding a single resin sheet, a lower corner member provided so as to be continuous with the first base portion and the second base portion in correspondence with each corner of the bottom wall portion; In the folded state, the second side wall portion is in the folded position above the first side wall portion in the folded position, and the containers in the folded state are configured to be stacked vertically in the same orientation, the lower corner member includes a first cover portion that covers the first base portion and at least a portion of the first side wall portion in the upright position from the outer side of the container, a second cover portion that covers the second base portion and at least a portion of the second side wall portion in the upright position from the outer side of the container, and a bottom cover portion that covers a corner of the bottom wall portion from the lower side or from both the lower side and the upper side, the first cover portion includes a first regulating portion for regulating relative displacement of the upper container in a horizontal direction substantially perpendicular to the first side edge portion when the containers in the folded state are stacked on top of each other, and a first reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the first regulating portion; At least a portion of the first restricting portion is provided to protrude upward from the first reinforcing portion, and the first reinforcing portion extends upward to a position horizontally opposed to at least a portion of a thickness range of the second side wall portion in the folded state, a fastening means for fastening the first base portion and the first cover portion of the lower corner member; a fastening means for fastening the second base portion and the second cover portion of the lower corner member. Means 4. A surface of the first reinforcing portion on the inner side of the container is located on the inner side of the container relative to a surface of the first restricting portion on the inner side of the container, and a part of the first side wall portion is configured to be placed on an upper surface of the first reinforcing portion in the assembled state; the second cover portion includes a second regulating portion for regulating relative displacement in a horizontal direction substantially perpendicular to the second side edge portion of the upper stacked container when the containers in the folded state are stacked on top of each other, and a second reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the second regulating portion; At least a portion of the second regulating portion is provided so as to protrude upward from the second reinforcing portion, and a surface of the second reinforcing portion on an inner side of the container is located on an inner side of the container than a surface of the second regulating portion on an inner side of the container, the first reinforcing portion and the second reinforcing portion are connected, and the first restricting portion and the second restricting portion are connected, The container described in Means 3 is characterized in that in the assembled state, a part of the second side wall portion can be placed on an upper surface of the second reinforcing portion. Means 5. A container as described in Means 3 or 4, characterized in that in the assembled state, the lower part of the side edge of the first side wall portion is located closer to the center of the width of the first side wall portion than the inner surface of the adjacent second side wall portion, and the lower part of the side edge of the second side wall portion is located closer to the center of the width of the second side wall portion than the outer surface of the adjacent first side wall portion. Means 6. The second side wall portion has a protrusion protruding from a side edge portion of the second side wall portion toward the inside of the container, A container described in any one of means 3 to 5, characterized in that in the folded state, a side edge portion of the second side wall portion including the protrusion and the first reinforcing portion face each other and abut or are close to each other in the width direction of the second side wall portion.

[0019] means 3rd class This makes it possible to more reliably prevent the lower corner members from falling off or becoming displaced, thereby stabilizing the shape of the container and, ultimately, the state in which containers are stacked together in a specified state. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a perspective view of the container in an assembled state. [Diagram 2] FIG. 2 is a perspective view of the container in a folded state. [Diagram 3] FIG. [Figure 4] 2 is an exploded perspective view of a resin sheet constituting a bottom wall portion, a long side base portion, and a short side base portion. FIG. [Diagram 5] 2 is a perspective view showing the bottom wall portion, the long side base portion, and the short side base portion (resin sheet). FIG. [Figure 6] FIG. 2 is a perspective view showing the lower corner member (upper and inner side). [Figure 7]FIG. 2 is a perspective view showing the lower corner member (upper and outer side). [Figure 8] FIG. 2 is a perspective view showing the lower corner member (lower and outer side). [Figure 9] FIG. 2 is a partially enlarged perspective view showing the peripheral portion (inside) of a specific lower corner member of the container in an assembled state. [Figure 10] FIG. 2 is a partially enlarged perspective view showing the peripheral portion (outside) of a predetermined lower corner member of the container in an assembled state. [Figure 11] 10 is a cross-sectional view taken along line AA in FIG. 9. [Figure 12] 10 is a cross-sectional view taken along line BB in FIG. 9. [Figure 13] 10 is a cross-sectional view taken along line CC in FIG. 9. [Figure 14] 10 is a cross-sectional view taken along line DD in FIG. 9. [Figure 15] 1 is a partially enlarged perspective view showing the periphery of a specific lower corner member of the container in a folded state; FIG. [Figure 16] 1 is a partially enlarged perspective view showing the periphery of a specific lower corner member of a container (short side wall portions and hinge members connected to the short side wall portions are omitted) with the long side wall portions in a folded position. FIG. [Figure 17] 16 is a partially enlarged vertical cross-sectional view (cross-sectional view taken along line EE in FIG. 15) showing the periphery of a predetermined lower corner member of the container in the folded state. [Figure 18] 1 is a partially enlarged horizontal cross-sectional view showing the periphery of a predetermined lower corner member of the container in an assembled state. [Figure 19] FIG. 2 is a perspective view showing a state in which containers in a folded state are stacked on top of each other. [Figure 20] 11A to 11C are partially enlarged perspective views showing a process in which the long-side side wall portion is being pivotally displaced. [Figure 21] 11A to 11C are partially enlarged perspective views showing a process in which the long-side side wall portion is being pivotally displaced. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] An embodiment will be described below with reference to the drawings. As shown in Figures 1, 3, and 5, the container 1 includes a bottom wall 2 having a generally rectangular shape in plan view, long-side base portions 3 as first base portions each extending upward from a pair of opposing long sides (first sides) of the bottom wall 2, and short-side base portions 4 as second base portions each extending upward from a pair of opposing short sides (second sides) of the bottom wall 2. As shown in FIG. 4, the bottom wall 2, the long side base 3, and the short side base 4 of this embodiment are formed from one resin sheet (for example, a resin molded product having two layers of sheets extending parallel to each other at a predetermined distance from each other and a connecting portion connecting the two layers of sheets in a substantially mesh-like shape), and the resin sheet has a rectangular portion forming the bottom wall 2, a long side piece continuous with the long side of the rectangular portion, and a short side piece continuous with the short side of the rectangular portion. Then, as shown in FIG. 5, the resin sheet is placed substantially horizontally, and the long side piece is folded upward to form the long side base 3, and the short side piece is folded upward to form the short side base 4. The resin sheet has a shape in which the portions of the long side piece and the short side piece corresponding to each corner of the bottom wall 2 are removed. Furthermore, as shown in Figs. 1 and 3, the container 1 is provided with lower corner members 5 that are continuous with the long side base portion 3 and the short side base portion 4 in correspondence with each corner of the bottom wall portion 2 and are provided so as to maintain the upright posture of the long side base portion 3 and the short side base portion 4. As shown in Fig. 5, the outer surfaces of the long side base portion 3 and the short side base portion 4, which are formed by folding the long side pieces and the short side pieces of the resin sheet, are located outside the outer peripheral edge of the bottom wall portion 2. The resin sheet is symmetrical with respect to a straight line passing through the center of the long side width direction and a straight line passing through the center of the short side width direction, respectively (see Fig. 4), and the lower corner members 5 provided at each corner of the bottom wall portion 2 are the same shape when diagonally disposed on the bottom wall portion 2, and the lower corner members 5 arranged along each side of the bottom wall portion 2 are mirror symmetrical with each other.

[0022] 1, 3, etc., the container 1 includes a long-side sidewall portion 7 (first sidewall portion) connected to the long-side base portion 3 via a hinge member 6 (hinge portion), and a short-side sidewall portion 8 (second sidewall portion) connected to the short-side base portion 4 via a hinge member 6 (hinge portion). The long-side sidewall portion 7 and the short-side sidewall portion 8 are configured to be rotatable between an upright position (see FIG. 1) in which they stand above the long-side base portion 3 and the short-side base portion 4, respectively, and a folded position (see FIG. 2) in which they are tilted above the bottom wall portion 2, and the container 1 is configured to be able to change its state between an assembled state in which all the long-side sidewall portions 7 and the short-side sidewall portions 8 are in an upright position as shown in FIG. 1, and a folded state in which all the long-side sidewall portions 7 and the short-side sidewall portions 8 are in a folded position as shown in FIG. 2. Each component of the container 1 of this embodiment is made of polypropylene. Furthermore, the hinge member 6 connected to the long side base portion 3 (long side wall portion 7) and the hinge member 6 connected to the short side base portion 4 (short side wall portion 8) have different lengths depending on the corresponding base portions 3, 4, but have the same cross-sectional shape.

[0023] As shown in Figs. 3, 11 and 13, the hinge member 6 is made up of a base-side connecting portion 6a having a generally U-shaped cross section and opening downward, which is connected to the long-side base portion 3 or the short-side base portion 4, a side-wall-side connecting portion 6b having a generally U-shaped cross section and opening upward (when the container 1 is in an assembled state) which is connected to the long-side sidewall portion 7 or the short-side sidewall portion 8, and a thin-walled connecting portion 6b connecting between the base-side connecting portion 6a and the side-wall-side connecting portion 6b so as to allow rotational displacement of the side-wall-side connecting portion 6b relative to the base-side connecting portion 6a. and an inward slippage prevention mechanism 6d which restricts inward displacement of the lower parts of the long side wall portion 7 and the short side wall portion 8 of the container 1 when the long side side wall portion 7 and the short side side wall portion 8 are in an upright position and which can abut against each of the connecting portions between the base side connecting portion 6a and the sidewall side connecting portion 6b (the portion provided on the base side connecting portion 6a side abuts against the sidewall side connecting portion 6b, and the portion provided on the sidewall side connecting portion 6b side abuts against the base side connecting portion 6a).

[0024] As shown in FIG. 3 and other figures, in this embodiment, the protruding length of the short-side base portion 4 from the bottom wall portion 2 is longer than the protruding length of the long-side base portion 3 from the bottom wall portion 2, and as shown in FIG. 1 and other figures, the hinge member 6 connected to the short-side sidewall portion 8 is located above the hinge member 6 connected to the long-side sidewall portion 7. For this reason, when the assembled container 1 is folded, the pair of long-side sidewall portions 7 are first displaced to the folded position, and then the short-side sidewall portion 8 is displaced to the folded position so as to overlap the top of the long-side sidewall portion 7 (see FIGS. 2, 20, and 21). Also, in this embodiment, in the folded state of the container 1, the pair of long-side sidewall portions 7 overlap each other vertically, while the pair of short-side sidewall portions 8 are spaced apart from each other in the longitudinal width direction of the container 1, and are configured to be aligned in height.

[0025] 1, 3, etc., the long side wall portion 7 includes a long side wall main body 11 made of a resin sheet (the same material as that constituting the bottom wall portion 2, etc., but separate from the resin sheet constituting the bottom wall portion 2, etc.), long side side reinforcing members 12 connected to both side portions of the long side wall main body 11, a long side upper reinforcing member 13 connected to the upper side portion of the long side wall main body 11, and long side upper connecting members 14 connected to both upper corners of the long side wall main body 11. The long side side reinforcing members 12 and the long side upper reinforcing members 13 have a substantially U-shaped cross section, and are assembled to the long side wall main body 11 in such a manner that the side portions of the long side wall main body 11 or the upper side portion of the long side wall main body 11 are inserted into the inside of the long side wall reinforcing members 12 and 13, respectively.

[0026] As shown in Figures 3, 20 and 21, the long side upper connecting member 14 comprises a long side inner surface constituent part 15 that constitutes the inner surface side of the upper corner of the long side side wall portion 7, a long side outer surface constituent part 16 that constitutes the outer surface side of the upper corner of the long side side wall portion 7, and a long side upper surface constituent part 17 that connects the upper sides of the long side inner surface constituent part 15 and the long side outer surface constituent part 16 and constitutes the upper surface side of the upper corner of the long side side wall portion 7. Then, with the upper corners of the long side wall main body 11, the upper parts of the long side side reinforcing members 12 assembled to the long side wall main body 11, and the sides of the long side upper reinforcing members 13 assembled to the long side wall main body 11 inserted inside the long side upper connecting member 14, the long side upper connecting member 14, the long side side reinforcing members 12, and the long side wall main body 11 are fixed together with rivets (rivets are omitted from the illustration for convenience), and the long side upper connecting member 14, the long side upper reinforcing member 13, and the long side wall main body 11 are fixed together with rivets. In this way, the long side upper connecting member 14, the long side side reinforcing members 12, and the long side upper reinforcing members 13 are attached to the long side wall main body 11. The side wall side connecting portion 6b of the hinge member 6 is connected to the lower edge portion of the long side wall main body 11 (for example, the side wall side connecting portion 6b and the long side wall main body 11 are fixed with a rivet with the lower edge portion of the long side wall main body 11 inserted into the side wall side connecting portion 6b), so that the long side side wall portion 7 is connected to the long side base portion 3 so as to be rotatable and displaceable. The long side side wall portion 7 in this embodiment is composed of the long side wall main body 11, the long side side reinforcing member 12, the long side upper reinforcing member 13, the long side upper connecting member 14, and the side wall side connecting portion 6b of the hinge member 6.

[0027] 1, 3, etc., the short side wall portion 8 includes a short side wall main body 21 made of a resin sheet (the same material as that constituting the bottom wall portion 2, etc., but separate from the resin sheet constituting the bottom wall portion 2, etc.), short side side reinforcing members 22 respectively connected to both side portions of the short side wall main body 21, a short side upper reinforcing member 23 connected to the upper side portion of the short side wall main body 21, and a short side upper connecting member 24 respectively connected to both upper corner portions of the short side wall main body 21. The short side side reinforcing member 22 and the short side upper reinforcing member 23 have a substantially U-shaped cross section, and are assembled to the short side wall main body 21 in such a manner that the side portion of the short side wall main body 21 or the upper side portion of the short side wall main body 21 is inserted into the inside of the short side wall main body 21.

[0028] As shown in Figures 3, 20 and 21, the short side upper connecting member 24 comprises a short side inner surface constituent portion 25 that constitutes the inner surface side of the upper corner of the short side side wall portion 8, a short side outer surface constituent portion 26 that constitutes the outer surface side of the upper corner of the short side side wall portion 8, and a short side upper surface constituent portion 27 that connects the upper sides of the short side inner surface constituent portion 25 and the short side outer surface constituent portion 26 and constitutes the upper surface side of the upper corner of the short side side wall portion 8. Then, with the upper corners of the short sidewall main body 21, the upper parts of the short side side reinforcing members 22 assembled to the short sidewall main body 21, and the sides of the short side upper reinforcing members 23 assembled to the short sidewall main body 21 inserted inside the short side upper connecting member 24, the short side upper connecting member 24, the short side side reinforcing members 22, and the short sidewall main body 21 are fixed together with rivets, and the short side upper connecting member 24, the short side upper reinforcing member 23, and the short sidewall main body 21 are fixed together with rivets. In this way, the short side upper connecting member 24, the short side side reinforcing members 22, and the short side upper reinforcing members 23 are attached to the short sidewall main body 21. The sidewall connecting portion 6b of the hinge member 6 is connected to the lower edge portion of the short sidewall main body 21 (for example, the sidewall connecting portion 6b and the short sidewall main body 21 are fixed with a rivet with the lower edge portion of the short sidewall main body 21 inserted into the sidewall connecting portion 6b), so that the short side sidewall portion 8 is connected to the short side base portion 4 so as to be rotatable and displaceable. The short side sidewall portion 8 in this embodiment is composed of the short sidewall main body 21, the short side side reinforcing member 22, the short side upper reinforcing member 23, the short side upper connecting member 24, and the sidewall connecting portion 6b of the hinge member 6.

[0029] The short-side upper connecting member 24 also includes a restricting wall portion 30 that protrudes from the side of the short-side inner surface forming portion 25 toward the inside of the container 1. The restricting wall portion 30 is configured to overlap the outer surface of the long-side upper connecting member 14 in the inside-outside direction of the container 1 when the container 1 is in an assembled state. The restricting wall portion 30 is further provided with an insertion hole portion 31 that penetrates the short-side side wall portion 8 in the width direction. In addition, the short-side upper connecting member 24 is provided with a substantially hook-shaped locking engagement portion 32 (see FIG. 20) that protrudes from the surface of the restricting wall portion 30 toward the width direction center of the short-side side wall portion 8 and has a tip portion that is bent downward.

[0030] 21, the outer side of the long side upper connecting member 14 is configured so that the long side outer surface constituent part 16 is omitted (the outer surface of the short side inner surface constituent part 25 of the container 1 is exposed), and a regulated wall part 33 that substantially abuts against the regulating wall part 30 of the short side side wall part 8 (short side upper connecting member 24) when the container 1 is assembled, and an insertion protrusion 34 that protrudes outward from the outer surface of the regulated wall part 33 and is inserted into the insertion hole part 31 of the regulating wall part 30 when the container 1 is assembled (is substantially recessed and fitted into the insertion hole part 31 to be locked). This configuration prevents the long side side wall part 7 and the short side side wall part 8 from tilting outward of the container 1, and regulates the relative displacement in the vertical direction between the long side side wall part 7 and the short side side wall part 8.

[0031] Furthermore, a locking member 35 is attached to the outer surface of the long-side upper connecting member 14 to prevent the long-side side wall portion 7 from tilting inwardly of the container 1, and thus to maintain the assembled state of the container 1. The locking member 35 is configured to be slidable in the vertical direction inside a lock accommodating portion 36 provided on the outer surface of the long-side upper connecting member 14, and includes a locking member main body 37 that is always biased upward, an engaging piece 38 that protrudes laterally from the locking member main body 37 and has a tip portion disposed opposite the outer surface of the regulated wall portion 33, and a biasing means that is provided on the underside of the locking member main body 37 and extends at a downward incline so as to approach and then move away from each other, and that can always bias the locking member main body 37 upward. When the container 1 is in an assembled state, the locking piece 38 is locked to the locking portion 32 of the short-side upper connecting member 24, and the movement of the locking piece 38, and therefore the long-side sidewall 7, toward the inside of the container 1 is restricted. A concave operating portion 39 is provided on the outer surface of the locking member main body 37, and by operating the operating portion 39 to move the locking member main body 37 downward, the locking piece 38 is displaced to a region below the locking portion 32 and opening toward the center of the short-side sidewall 8 in the width direction, and the locking state with the locking portion 32 is released. By tilting the long-side sidewall 7 toward the inside of the container 1 while maintaining the state of the locking member 35, the long-side sidewall 7 can be displaced to the folded posture.

[0032] 6 to 9, the lower corner member 5 includes a bottom covering portion 41 that covers the corner of the bottom wall portion 2 from both the upper and lower sides, a long side covering portion 42 that protrudes upward from the bottom covering portion 41 and serves as a first covering portion extending along the long side base portion 3, and a short side covering portion 43 that protrudes upward from the bottom covering portion 41 and serves as a second covering portion extending along the short side base portion 4. The long side covering portion 42 and the short side covering portion 43 are connected at their ends on the corner portion side of the container 1 at approximately a right angle.

[0033] 6, 12, etc., the bottom cover portion 41 includes an upper plate portion 44 facing the upper surface side of the bottom wall portion 2, and a lower plate portion 45 facing the lower surface side of the bottom wall portion 2. Then, with a corner portion of the bottom wall portion 2 inserted between the upper plate portion 44 and the lower plate portion 45, the upper plate portion 44, the lower plate portion 45, and the bottom wall portion 2 are fixed with rivets as fixing means, thereby connecting the lower corner member 5 (bottom cover portion 41) and the bottom wall portion 2.

[0034] In addition, the containers 1 are configured so that assembled containers 1 can be stacked vertically in the same orientation. That is, as shown in Fig. 1, Fig. 20, and Fig. 21, the long side upper connecting member 14 includes a long side upper edge regulating portion 19 protruding upward from the upper surface of the long side upper surface forming portion 17, and the short side upper connecting member 24 includes a short side upper surface forming portion 27 and a short side upper edge regulating portion 29 protruding upward from the upper surface of the regulating wall portion 30. The short side upper edge regulating portion 29 protruding upward from the regulating wall portion 30 and the long side upper edge regulating portion 19 are located on the outer side of the container 1 than the inner surface of the long side upper connecting member 14 (long side inner surface forming portion 15), and are further located on the outer side of the container 1 than the inner surface of the long side wall main body 11. The short side upper edge regulating portion 29 protruding upward from the short side upper surface constituent portion 27 is located on the outer side of the container 1 than the inner surface of the short side upper connecting member 24 (short side inner surface constituent portion 25), and further is located on the outer side of the container 1 than the inner surface of the short side wall main body 21.

[0035] 8, the lower corner member 5 is made up of a lower plate portion 45 of the bottom cover portion 41 and a rib connecting the lower plate portion 45 and the upper plate portion 44, and is provided with a support portion 46 that comes into contact with the installation surface when the container 1 is installed on the installation surface such as a floor surface and supports the lower corner member 5 and, ultimately, the container 1. Furthermore, on the underside of the lower corner member 5, the lower plate portion 45 (support portion 46) is formed in a substantially L-shape along the corner portion of the lower corner member 5 (underside of the container 1), and a stacking recess 47 is provided into which the long side upper edge regulating portion 19 and the short side upper edge regulating portion 29 of the lower container 1 are inserted when the assembled containers 1 are stacked on top of each other. With this configuration, by stacking the assembled containers 1 on top of one another, the upper edge of the stacking recess 47 of the upper container 1 comes into contact with and is supported by the long side top edge regulating portion 19 and the short side top edge regulating portion 29 of the lower container 1, and the support portion 46 of the upper container 1 comes into contact with and is supported by the long side top surface constituting portion 17 and the short side top surface constituting portion 27 of the lower container 1. Furthermore, the support portions 46 of the lower corner members 5 of the upper container 1 are inserted into the inner side of the upper corner portion constituted by the long side top edge regulating portions 19 and the short side top edge regulating portions 29 of the lower container 1, and come into close proximity to or into contact with the inner surfaces of the container 1 of the long side top edge regulating portion 19 and the short side top edge regulating portion 29 of the lower container 1.

[0036] As shown in Figures 6, 9, 10, etc., the long side covering portion 42 is equipped with a long side connecting portion 51 (see Figure 11) that is connected to the long side base portion 3 and the base side connecting portion 6a while abutting against the base side connecting portion 6a of the hinge member 6 with the long side base portion 3 inserted inside, a long side rotation limiting portion 52 (see Figures 11 and 12) that abuts against or is close to the outer surface of the long side side wall portion 7 (long side wall main body 11, long side side reinforcing member 12, and side wall side connecting portion 6b of the hinge member 6) when the long side side wall portion 7 is in an upright position (covering the target portion of the long side side wall portion 7 in the upright position from the outer side of the container 1), and a long side reinforcing portion 53 (see Figure 12) that is configured to be thicker than the long side connecting portion 51 and the long side rotation limiting portion 52. 6 and 12, the long-side reinforcing portion 53 includes a long-side reinforcing inner wall portion 54 protruding upward from the upper plate portion 44 of the bottom cover portion 41, and a long-side reinforcing upper wall portion 55 protruding outward from the upper edge portion of the long-side reinforcing inner wall portion 54 of the container 1. Note that, as shown in Figs. 3 and 9, the long-side sidewall portion 7 has a shape in which a portion corresponding to the long-side reinforcing portion 53 is omitted, and is configured not to interfere with the long-side reinforcing portion 53 when the container is in an upright position.

[0037] 6 and other figures, the long-side connecting portion 51 is disposed adjacent to the long-side reinforcing portion 53 on the side of the widthwise center of the long-side sidewall portion 7. Furthermore, the bottom cover portion 41 has a shape in which a range of the upper plate portion 44 that is closer to the widthwise center of the long-side sidewall portion 7 than the long-side reinforcing portion 53 is cut out so that the base connecting portion 6a of the hinge member 6 connected to the long-side base portion 3 is brought into approximate contact with the long-side connecting portion 51. The long-side connecting portion 51 protrudes upward from the lower plate portion 45 in the range in which the upper plate portion 44 is cut out, and includes a long-side auxiliary inner wall portion 56 that extends parallel to the long-side reinforcing inner wall portion 54 along the widthwise direction of the long-side sidewall portion 7. The long side reinforcement portion 53 is made thick so as to protrude inwardly of the container 1, and the long side reinforcement inner wall portion 54 is located closer to the center of the width of the short side side wall portion 8 (on the inner side of the container 1) than the long side auxiliary inner wall portion 56 in the thickness direction of the long side covering portion 42 (in the width direction of the short side side wall portion 8).

[0038] Then, as shown in Figures 9, 11, etc., by inserting the corners of the bottom wall portion 2 into the bottom covering portion 41, the base side connecting portion 6a of the hinge member 6 assembled to the long side base portion 3 is brought into approximate contact with the long side connecting portion 51 (the lower part of the long side auxiliary inner wall portion 56), and by fixing the long side base portion 3, the base side connecting portion 6a, and the long side connecting portion 51 with rivets as fixing means, the lower corner member 5 (long side covering portion 42) and the long side base portion 3 are connected (the sides of the long side base portion 3 are covered from the outer side of the container 1 by the long side covering portion 42).

[0039] 8, 12, etc., the long-side reinforcing inner wall portion 54 of the long-side reinforcing portion 53 is connected to the upper plate portion 44 of the bottom cover portion 41, but a rib is provided so as to extend the long-side reinforcing inner wall portion 54 downward, and the rib is connected to the lower plate portion 45. As shown in FIG. 3, in this embodiment, the outer surface of the long-side base portion 3 is located outward from the outer circumferential edge of the bottom wall portion 2, and the base side connecting portion 6a of the hinge member 6 is assembled to the long-side base portion 3. Therefore, even if the long-side connecting portion 51 (long-side auxiliary inner wall portion 56) is located outward from the container 1 from the inner surface (long-side reinforcing inner wall portion 54) of the long-side reinforcing portion 53, it is configured to substantially abut against the base side connecting portion 6a assembled to the long-side base portion 3.

[0040] 10, 11, etc., the long-side auxiliary inner wall portion 56 extends above the base-side connecting portion 6a of the hinge member 6 connected to the long-side auxiliary inner wall portion 56 (long-side connecting portion 51), and the portion above the base-side connecting portion 6a faces and abuts or is close to the outer surface of the long-side side wall portion 7 (long-side wall main body 11 and side wall-side connecting portion 6b of the hinge member 6) in the assembled state of the container 1 (the state in which the long-side sidewall portion 7 is in an upright position). In other words, the lower portion of the long-side auxiliary inner wall portion 56 constitutes the long-side connecting portion 51, and the upper portion of the long-side auxiliary inner wall portion 56 constitutes the long-side rotation limiting portion 52.

[0041] Furthermore, as shown in Figures 6, 11, etc., the long side cover portion 42 has a long side auxiliary upper wall portion 57 that protrudes outward from the upper edge portion of the long side auxiliary inner wall portion 56 toward the outside of the container 1, and the upper surface of the long side auxiliary upper wall portion 57 is at the same height as the upper surface of the long side reinforcing portion 53 (the upper surface of the long side reinforcing upper wall portion 55).

[0042] 6, 12, etc., the long-side cover portion 42 is provided with a long-side regulating portion 58 that protrudes upward from the upper surface of the long-side reinforcing portion 53 (the upper surface of the long-side reinforcing upper wall portion 55). As shown in Fig. 6, 11, etc., in the thickness direction of the long-side cover portion 42 (the thickness direction of the long-side sidewall portion 7, the width direction of the short-side sidewall portion 8), the inner surface of the long-side regulating portion 58 (the surface on the inner side of the container 1, the surface on the central side in the width direction of the short-side sidewall portion 8) is located at approximately the same position as the inner surface of the long-side auxiliary inner wall portion 56 (the long-side regulating portion 58 is slightly outward).

[0043] 1, 9, etc., the long side wall 7 (long side wall main body 11) is configured to extend to a range located directly above the long side reinforcement 53 when in the upright position, and as shown in Figs. 10 and 12, in the assembled state of the container 1 (when the long side wall 7 is in the upright position), the long side restriction portion 58 faces and is close to the outer surface of the long side wall 7 (long side wall main body 11 and long side reinforcing member 12). In other words, the long side restriction portion 58 also constitutes the long side rotation restriction portion 52 together with the upper portion of the long side auxiliary inner wall 56.

[0044] 9, 12, etc., a part of the lower edge of the long side wall 7 can be placed on the upper surface of the long side reinforcement 53 when the container 1 is in an assembled state. That is, a portion including a lower corner of the long side wall 7 in an upright position corresponding to the long side reinforcement 53 is cut out, and the long side wall main body 11 is exposed on both sides of the lower edge of the long side wall 7 (the hinge member 6 is not connected). In this embodiment, both sides of the lower edge of the long side wall 7 do not abut on the upper surface of the long side reinforcement 53 when the container 1 is simply assembled, but when a certain degree of force is applied downward to the long side wall 7, such as when another container 1 is stacked above the assembled container 1, both sides of the lower edge of the long side wall 7 abut on the long side reinforcement 53.

[0045] Incidentally, the container 1 may be configured so that both sides of the lower edge of the long-side side wall portion 7 come into contact with the upper surface of the long-side reinforcement portion 53 simply by putting the container 1 into an assembled state (at the same time that the base-side connecting portion 6a side and the sidewall-side connecting portion 6b side of the hinge member 6 come into vertical contact with each other, or before the base-side connecting portion 6a side and the sidewall-side connecting portion 6b side come into vertical contact with each other). Also, it is possible to configure the hinge member 6 connected to the long-side base portion 3 to be shorter than the distance between the lower corner members 5 in the longitudinal width direction of the container 1, so that the side portions of the long-side base portion 3 are exposed from the hinge member 6, and are connected to the lower corner members 5 at the exposed portions. Furthermore, it is also possible to configure the long side base portion 3 to be shorter than the distance between the lower corner members 5 in the longitudinal width direction of the container 1, connect the long side base portion 3 to the base side connecting portion 6a of the hinge member 6, and connect the base side connecting portion 6a to the lower corner member 5 (a configuration in which the long side base portion 3 is not covered from the outside of the container 1 by the long side covering portion 42).

[0046] As shown in Figures 6, 9, 10, etc., the short side covering portion 43 is equipped with a short side connecting portion 61 (see Figure 13) that is connected to the short side base portion 4 and the base side connecting portion 6a while abutting against the base side connecting portion 6a of the hinge member 6 with the short side base portion 4 inserted inside, a short side rotation limiting portion 62 (see Figures 13 and 14) that abuts against or is close to the outer surface of the short side side wall portion 8 (short side wall main body 21, short side side reinforcing member 22, and side wall side connecting portion 6b of the hinge member 6) when the short side side wall portion 8 is in an upright position (covering the target portion of the short side side wall portion 8 in the upright position from the outer side of the container 1), and a short side reinforcing portion 63 (see Figure 14) that is configured to be thicker than the short side connecting portion 61 and the short side rotation limiting portion 62. 6 and 14, the short-side reinforcing portion 63 includes a short-side reinforcing inner wall portion 64 protruding upward from the upper plate portion 44 of the bottom cover portion 41, and a short-side reinforcing upper wall portion 65 protruding outward from the upper edge portion of the short-side reinforcing inner wall portion 64 of the container 1. As shown in Figs. 3 and 9, the short-side side wall portion 8 is shaped such that a portion corresponding to the short-side reinforcing portion 63 is omitted, and the short-side side wall portion 8 is configured not to interfere with the short-side reinforcing portion 63 when the container is in an upright position.

[0047] As shown in FIG. 6 and other figures, the short-side connecting portion 61 is disposed adjacent to the short-side reinforcing portion 63 on the side of the center in the width direction of the short-side side wall portion 8 . Furthermore, as shown in Figures 3, 5, etc., the short side base portion 4 has a shape in which the lower portions of both sides are cut out (the connection portions with the bottom wall portion 2 are omitted), and as shown in Figures 9 and 13, when the corners of the bottom wall portion 2 are inserted into the bottom cover portion 41, the upper plate portion 44 of the bottom cover portion 41 (if the upper plate portion 44 is defined as the portion facing the upper surface of the bottom wall portion 2, then the portion continuous with the upper plate portion 44) is inserted relative to the cut-out portion, so that the side of the short side base portion 4 is positioned above the upper plate portion 44 (the portion continuous with the upper plate portion 44), and the inner surface of the short side connecting portion 61 facing the container 1 abuts or is close to the short side base portion 4 and the base side connecting portion 6b of the hinge member 6 assembled to the short side base portion 4.

[0048] 6, 13, etc., the short side connecting portion 61 protrudes upward from the upper plate portion 44 (a portion continuous with the upper plate portion 44) in a range facing the short side base portion 4 and the base side connecting portion 6b, and includes a short side auxiliary inner wall portion 66 extending parallel to the short side reinforcing inner wall portion 64 along the width direction of the short side side wall portion 8. The short side reinforcing portion 63 is thick so as to protrude toward the inside of the container 1, and the short side reinforcing inner wall portion 64 is located closer to the center in the width direction of the long side side wall portion 7 (inner side of the container 1) than the short side auxiliary inner wall portion 66 in the thickness direction of the short side cover portion 43 (width direction of the long side side wall portion 7).

[0049] Then, by inserting the corner of the bottom wall portion 2 into the bottom covering portion 41, the base side connecting portion 6a of the hinge member 6 assembled to the short side base portion 4 is brought into approximate contact with the short side connecting portion 61 (the lower part of the short side auxiliary inner wall portion 66), and by fixing the short side base portion 4, base side connecting portion 6a and short side connecting portion 61 with rivets as fixing means, the lower corner member 5 (short side covering portion 43) and the short side base portion 4 are connected (the side of the short side base portion 4 is covered from the outer side of the container 1 by the short side covering portion 43).

[0050] 8 and 14, the short-side reinforcing inner wall portion 64 of the short-side reinforcing portion 63 is connected to the upper plate portion 44 of the bottom cover portion 41, but a rib is provided so as to extend the short-side reinforcing inner wall portion 64 downward, and the rib is connected to the lower plate portion 45. As shown in FIG. 3, in this embodiment, the outer surface of the short-side base portion 4 is located outward from the outer periphery of the bottom wall portion 2, and the base side connecting portion 6a of the hinge member 6 is assembled to the short-side base portion 4. Therefore, even if the short-side connecting portion 61 (short-side auxiliary inner wall portion 66) is located outward from the container 1 from the inner surface (short-side reinforcing inner wall portion 64) of the short-side reinforcing portion 63, it is arranged to substantially abut against the base side connecting portion 6a assembled to the short-side base portion 4. Furthermore, as shown in Figures 6, 9, and 13, cutout portions are formed on both side portions of the short side base portion 4, so that the lower edge portions are positioned slightly above the upper surface of the upper plate portion 44 of the bottom cover portion 41, and therefore the portion adjacent to the inner side of the container 1 of the short side connecting portion 61 is formed as a step portion that is one step higher than the general portion of the upper plate portion 44.

[0051] 10 and 13, the short-side auxiliary inner wall portion 66 extends above the base-side connecting portion 6a of the hinge member 6 connected to the short-side auxiliary inner wall portion 66 (short-side connecting portion 61), and the portion above the base-side connecting portion 6a faces and abuts against or is close to the outer surface of the short-side side wall portion 8 (side wall-side connecting portion 6b of the hinge member 6) in the assembled state of the container 1 (a state in which the short-side side wall portion 8 is in an upright position). In other words, the portion including the lower portion of the short-side auxiliary inner wall portion 66 constitutes the short-side connecting portion 61, and the portion including the upper end portion of the short-side auxiliary inner wall portion 66 constitutes the short-side rotation limiting portion 62.

[0052] Furthermore, as shown in Figures 6 and 13, the short side covering portion 43 has a short side auxiliary upper wall portion 67 that protrudes outward from the upper edge portion of the short side auxiliary inner wall portion 66, and the upper surface of the short side auxiliary upper wall portion 67 is at the same height as the upper surface of the short side reinforcing portion 63 (the upper surface of the short side reinforcing upper wall portion 65).

[0053] 6 and 14, the short-side cover portion 43 is provided with a short-side regulating portion 68 that protrudes upward from the upper surface of the short-side reinforcing portion 63 (upper surface of the short-side reinforcing upper wall portion 65). In the thickness direction of the short-side cover portion 43 (thickness direction of the short-side side wall portion 8, width direction of the long-side side wall portion 7), the inner surface of the short-side regulating portion 68 (the surface on the inner side of the container 1, the surface on the central side in the width direction of the long-side side wall portion 7) is located at approximately the same position as the inner surface of the short-side auxiliary inner wall portion 66 (the short-side regulating portion 68 is slightly outward).

[0054] 1, 9, etc., the short side wall 8 (short side wall main body 21) is configured to extend to a range located directly above the short side reinforcing portion 63 when in the upright position, and as shown in Fig. 10 and 14, in the assembled state of the container 1 (when the short side wall 8 is in the upright position), the short side regulating portion 68 faces and abuts against or is close to the outer surface of the short side side wall 8 (short side wall main body 21 and short side reinforcing member 22). In other words, the short side regulating portion 68 also constitutes the short side rotation limiting portion 62 together with a portion including the upper end of the short side auxiliary inner wall portion 66.

[0055] 9, 14, etc., when the container 1 is in an assembled state, a part of the lower edge of the short-side sidewall 8 can be placed on the upper surface of the short-side reinforcement 63. That is, a portion including a lower corner of the short-side sidewall 8 in the upright position corresponding to the short-side reinforcement 63 is cut out, and the short-side wall main body 21 is exposed on both sides of the lower edge of the short-side sidewall 8 (the hinge member 6 is not connected). In this embodiment, simply by assembling the container 1, the base side connecting portion 6a side and the side wall side connecting portion 6b side of the hinge member 6 come into contact from above and below, and at the same time, both side portions of the lower edge of the short side side wall portion 8 come into contact with the upper surface of the short side reinforcement portion 63 (in this example, both side portions of the lower edge of the short side wall main body 21 are located slightly lower than the lower edge of the short side side reinforcement member 22, and both side portions of the lower edge of the short side wall main body 21 come into contact with the upper surface of the short side reinforcement portion 63).

[0056] In addition, the container 1 may be configured such that both sides of the lower edge of the short-side sidewall 8 do not come into contact with the upper surface of the short-side reinforcement 63 simply by putting the container 1 in the assembled state, but when a certain degree of downward force acts on the short-side sidewall 8, such as when another container 1 is stacked above the assembled container 1, the both sides of the lower edge of the short-side sidewall 8 come into contact with the short-side reinforcement 63, or the container 1 may be configured such that both sides of the lower edge of the short-side sidewall 8 come into contact with the upper surface of the short-side reinforcement 63 before the base connecting portion 6a and the sidewall connecting portion 6b come into contact with each other vertically simply by putting the container 1 in the assembled state. Also, it is possible to configure the hinge member 6 connected to the short-side base 4 to be shorter than the distance between the lower corner members 5 in the short width direction of the container 1, so that the side of the short-side base 4 is exposed from the hinge member 6, and the exposed portion is connected to the lower corner member 5. Furthermore, it is also possible to configure the short side base portion 4 to be shorter than the distance between the lower corner members 5 in the short width direction of the container 1, connect the short side base portion 4 to the base side connecting portion 6a of the hinge member 6, and connect the base side connecting portion 6a to the lower corner member 5 (a configuration in which the short side base portion 4 is not covered from the outside of the container 1 by the short side covering portion 43).

[0057] 6 and other figures, the top surfaces of the long-side reinforcement portion 53 and the short-side reinforcement portion 63 are at the same height, and the top surfaces of the long-side restriction portion 58 and the short-side restriction portion 68 are at the same height. Furthermore, the long-side reinforcement portion 53 (long-side reinforcing inner wall portion 54 and long-side reinforcing upper wall portion 55) and the short-side reinforcement portion 63 (short-side reinforcing inner wall portion 64 and short-side reinforcing upper wall portion 65) are connected, and the long-side restriction portion 58 and the short-side restriction portion 68 are connected (on the top surface side and inner surface side). In addition, as shown in Figure 8, etc., reinforcing structures such as ribs extending in the vertical direction are appropriately provided on the outer surfaces of the long side covering portion 42 and the short side covering portion 43 (the inner spaces of the long side connecting portion 51, the long side rotation limiting portion 52, the long side reinforcing portion 53, the short side connecting portion 61, the short side rotation limiting portion 62, and the short side reinforcing portion 63).

[0058] 3, 18, 20, etc., each short-side side reinforcing member 22 of the short-side sidewall portion 8 has a protruding portion 22a protruding from the side of the short-side sidewall portion 8 toward the inside of the container 1. As shown in FIG. 18, in the assembled state of the container 1, the range including the lower portion of the side of the long-side sidewall portion 7 (the portion to which the long-side side reinforcing member 12 is attached) is located closer to the center in the width direction of the long-side sidewall portion 7 than the inner surface of the adjacent short-side sidewall portion 8 (including the short-side side reinforcing member 22, etc.), and in particular, in this embodiment, it is located closer to the center in the width direction of the long-side sidewall portion 7 than the protruding portion 22a of the short-side side reinforcing member 22 of the short-side sidewall portion 8. Furthermore, the inner surface of the short side reinforcement portion 63 is configured to be in approximately the same position in the inward / outward direction of the container 1 (thickness direction of the short side side wall portion 8) as the inner surface of the general part of the short side side reinforcement member 22 of the short side side wall portion 8 in the upright position (the inner surface of the short side reinforcement portion 63 is slightly toward the outside of the container 1).

[0059] Furthermore, in the assembled state of the container 1, the range including the lower part of the side of the short side wall portion 8 (the part where the short side side reinforcing member 22 is attached) is located closer to the center of the short side wall portion 8 in the width direction than the outer surface of the adjacent long side wall portion 7. In particular, in the present embodiment, in the width direction of the short side side wall portion 8, the side of the short side side reinforcing member 22 of the short side side wall portion 8 is located at substantially the same position as the inner surface of the long side reinforcing portion 53 (located closer to the center of the width direction of the short side side wall portion 8 than the outer surface of the long side reinforcing inner wall portion 54 of the long side reinforcing portion 53). Note that the inner surface of the long side reinforcing portion 53 is configured to be located at substantially the same position as the inner surface of the long side side reinforcing member 12 of the long side side wall portion 7 in the upright posture in the inward / outward direction of the container 1 (thickness direction of the long side wall portion 7) (the inner surface of the long side reinforcing portion 53 is slightly toward the outer side of the container 1).

[0060] 2, 16 and 18, the width of the long side wall portions 7 is configured to be shorter than the distance between the short side reinforcement portions 63 of the lower corner member 5 on one side of the container 1 in the longitudinal width direction of the container 1 and the short side reinforcement portions 63 of the lower corner member 5 on the other side of the container 1. Therefore, the pair of long side side wall portions 7 can be folded into a region between the short side reinforcement portions 63 that are spaced apart from each other in the longitudinal width direction of the container 1 without being obstructed by the short side reinforcement portions 63.

[0061] As shown in Fig. 2, Fig. 15, and Fig. 18, the width of the short side wall portion 8 is slightly shorter (almost the same length) than the distance between the long side reinforcement portion 53 of the lower corner member 5 on one side of the container 1 in the short width direction of the container 1 and the long side reinforcement portion 53 of the lower corner member 5 on the other side of the container 1. Therefore, the pair of short side side wall portions 8 can be folded into a region between the long side reinforcement portions 53 arranged apart from each other in the short width direction of the container 1 without being hindered by the long side reinforcement portions 53. Also, as shown in Fig. 15 and Fig. 17, the upper surface of the long side reinforcement portion 53 (and the short side reinforcement portion 63) is at almost the same height as the surface (the outer surface in the upright position) of the short side side wall portion 8 in the folded position in the folded state of the container 1 that faces upward. Therefore, in the horizontal direction (width direction of the short side wall portion 8), the long side reinforcement portion 53 and the side portion of the short side wall portion 8 (almost the entire range including the protruding portion 22a of the short side side reinforcement member 22 in the vertical direction) are configured to face each other and abut or be close to each other. In this embodiment, when the container 1 is in the folded state, the upper surface of the long side reinforcement portion 53 (and the short side reinforcement portion 63) is above the surface of the short side wall main body 21 facing upward and below the surface of the short side side reinforcement member 22 facing upward (by applying a downward force to the short side side wall portion 8 in the folded position, the short side side reinforcement member 22 can also be made to be lower than the height of the upper surface of the long side reinforcement portion 53), but the short side side reinforcement member 22 in the folded position may be configured not to protrude above the upper surface of the long side reinforcement portion 53.

[0062] 19, in this embodiment, the containers 1 in the folded state can be stacked vertically in the same orientation. That is, by stacking the containers 1 in the folded state, the support portion 46 of each lower corner member 5 of the upper container 1 is inserted into the inner side (minor angle side) of the lower corner portion constituted by the long side covering portion 42 and the short side covering portion 43 of each lower corner member 5 of the lower container 1, and faces the inner surfaces of the container 1 of the long side regulating portion 58 and the short side regulating portion 68. More specifically, the long side regulating portions 58 and short side regulating portions 68 (see Figures 2 and 6) of each lower corner member 5 of the lower container 1 are inserted into the stacking recesses 47 (see Figures 2 and 8) of each lower corner member 5 of the upper container 1, so that the upper edge of the stacking recess 47 of the upper container 1 abuts against and is supported by the long side regulating portions 58 and short side regulating portions 68 of the lower container 1, and the support portion 46 of the upper container 1 abuts against and is supported by the upper surfaces of the long side reinforcement portion 53 (long side reinforcing upper wall portion 55) and short side reinforcement portion 63 (short side reinforcing upper wall portion 65) of the lower container 1.

[0063] 8, 12 and 14, the support portion 46 of the lower corner member 5 is provided with a support reinforcement protrusion 48 that protrudes outward beyond the outer surface of the long side reinforcing inner wall portion 54 and the outer surface of the short side reinforcing inner wall portion 64 in the inward / outward direction of the container 1 at the corner portion of the stacking recess 47 (the oblique angle side of the lower corner portion formed by the long side covering portion 42 and the short side covering portion 43). In other words, the support reinforcement protrusion 48 is located on the outer side of the container 1 beyond the inner surfaces of the long side reinforcing portion 53 and the short side reinforcing portion 63, and the support portion 46 (support reinforcement protrusion 48) is also located in a part of the position directly below the long side reinforcing portion 53 and the short side reinforcing portion 63 (the corner portion formed by the long side reinforcing portion 53 and the short side reinforcing portion 63). When the folded containers 1 are stacked, the support reinforcement protrusion 48 of the upper container 1 abuts against and is supported by the upper surfaces (corner portions formed by the long side reinforcement portion 53 and the short side reinforcement portion 63) of the long side reinforcement portion 53 (long side reinforcing upper wall portion 55) and the short side reinforcement portion 63 (short side reinforcing upper wall portion 65) of the lower container 1. The support reinforcement protrusion 48 is configured to abut or be close to the inner surfaces of the container 1 of the long side regulating portion 58 and the short side regulating portion 68 so as not to interfere with the upper surfaces of the long side regulating portion 58 and the short side regulating portion 68 of the lower container 1 when the folded containers 1 are stacked, thereby regulating relative displacement in the longitudinal width direction and the transverse width direction of the containers 1 between the stacked containers 1. In this embodiment, the long side regulating portion 58 corresponds to the first regulating portion, and the short side regulating portion 68 corresponds to the second regulating portion. The long side reinforcing portion 53 corresponds to the first reinforcing portion, and the short side reinforcing portion 63 corresponds to the second reinforcing portion.

[0064] 7 and 8, the support portion 46 also extends to a position adjacent to an end portion of the long-side side wall portion 7 of the long-side reinforcement portion 53 (stacking recess 47) on the widthwise center side (hereinafter, this portion will be referred to as the "long-side auxiliary protrusion 49"), and the support portion 46 also extends to a position adjacent to an end portion of the short-side side wall portion 8 of the short-side reinforcement portion 63 (stacking recess 47) on the widthwise center side (hereinafter, this portion will be referred to as the "short-side auxiliary protrusion 50"). When the folded containers 1 are stacked, the long-side auxiliary protrusion 49 is supported by abutting against the long-side auxiliary upper wall portion 57 of the lower container 1, and the short-side auxiliary protrusion 50 is supported by abutting against the short-side auxiliary upper wall portion 67 of the lower container 1. In addition, when the folded containers 1 are stacked, the surface of the long-side auxiliary protrusion 49 facing away from the widthwise center of the long-side sidewall 7 (hereinafter, this portion is referred to as the "long-side regulation opposing surface 49a") faces and is close to the surface of the long-side regulation portion 58 facing the widthwise center of the long-side sidewall 7. Furthermore, when the folded containers 1 are stacked, the surface of the short-side auxiliary protrusion 50 facing away from the widthwise center of the short-side sidewall 8 (hereinafter, this portion is referred to as the "short-side regulation opposing surface 50a") faces and is close to the surface of the short-side regulation portion 68 facing the widthwise center of the short-side sidewall 8. In this embodiment, when the containers 1 are stacked in a folded state, when the support reinforcement protrusion 48 of the upper container 1 abuts against the inner surface of the long side regulating portion 58 of the lower container 1, the short side regulating opposing surface 50a of the upper container 1 and the surface of the short side regulating portion 68 of the lower container 1 facing the center of the width direction of the short side side wall portion 8 are configured to be able to abut, and these cooperate to regulate relative displacement in the short width direction of the containers 1 between the stacked containers 1. Furthermore, when the folded containers 1 are stacked, when the support reinforcement protrusion 48 of the upper container 1 abuts against the inner surface of the short side regulating portion 68 of the lower container 1, the long side regulating opposing surface 49a of the upper container 1 and the surface of the long side regulating portion 58 of the lower container 1 facing the widthwise central portion of the long side side wall portion 7 are configured to be able to abut, and these cooperate to regulate relative displacement in the longitudinal width direction of the stacked containers 1.In this embodiment, the surface of the long side regulating portion 58 facing the center in the width direction of the long side wall portion 7, and the surface of the short side regulating portion 68 facing the center in the width direction of the short side wall portion 8 are inclined surfaces, but the entire surface may be made approximately vertical, or the lower portion may be an inclined surface and the upper portion may be an approximately vertical surface.

[0065] As described above in detail, according to this embodiment, the long-side reinforcement portion 53 is provided on the long-side cover portion 42 of the lower corner member 5, thereby increasing the strength and rigidity of the long-side regulating portion 58 protruding upward from the upper surface of the long-side reinforcement portion 53. In particular, the long-side reinforcement portion 53 extends upward to a position that faces horizontally almost the entire thickness range of the short-side sidewall portion 8 in the folded state of the container 1 (the upper surface of the long-side reinforcement portion 53 is at approximately the same height as the upward-facing surface of the short-side side reinforcing member 22 of the short-side sidewall portion 8 in the folded posture), so that the long-side reinforcement portion 53 can be disposed as close as possible to the portion of the long-side regulating portion 58 that can actually come into contact with the support portion 46 of the upper container 1 when the folded containers 1 are stacked on top of each other, and the effect of increasing the rigidity of the long-side regulating portion 58 is more prominent. Therefore, even if a force is applied to the long side regulating portion 58, deformation or the like of the long side regulating portion 58 can be prevented, and the folded containers 1 can be stabilized in a stacked state.

[0066] In addition, when the folded containers 1 are stacked, the long side regulating portion 58 for regulating the relative displacement of the containers 1 in the horizontal direction needs to be located above the short side wall portion 8 in the folded position, and in order to reinforce the long side regulating portion 58, it is desirable to extend the long side reinforcing portion 53 as far upward as possible. Here, the height of the folded containers 1 stacked together can be made the lowest by designing the support portion 46 of the upper container 1 to abut against the short side wall portion 8 in the folded position of the lower container 1. In this regard, in this embodiment, the upper surface of the long side reinforcing portion 53 is made to be at approximately the same height as the surface facing upward of the short side wall portion 8 in the folded position, so that the height of the containers 1 stacked in the folded state can be made as low as possible while reinforcing the long side regulating portion 58. Therefore, the height can be made relatively low while suppressing tilting, etc., when the folded containers 1 are stacked, and storage and transportation efficiency can be further improved.

[0067] In addition, the inner surface of the long side regulating portion 58 of the container 1 is configured to be located on the outer side of the container 1 than the inner surface of the long side reinforcing portion 53 of the container 1, and the side of the lower side of the long side side wall portion 7 can be placed on the upper surface of the long side reinforcing portion 53 in the assembled state of the container 1, and when the containers 1 in the folded state are stacked, the support portion 46 (support reinforcement protrusion 48) of the upper container 1 is configured to abut or come close to the inner surface of the container 1 of the long side regulating portion 58 of the lower container 1 facing each other. Therefore, the lower side of the long side side wall portion 7 in the upright position can be supported by the upper surface of the long side reinforcing portion 53. Therefore, the long side side wall portion 7 in the upright position can be stabilized, and the assembled state of the container 1 can be stabilized. In addition, the long side regulating portion 58 can regulate the outward displacement of the long side side wall portion 7 in the upright position of the container 1. Furthermore, since the inner surface of the long side regulating portion 58 of the container 1 is located on the outer side of the container 1 than the inner surface of the long side reinforcement portion 53 of the container 1, the support portion 46 (support reinforcement protrusion 48) can be provided up to a position directly below the long side reinforcement portion 53 and the short side reinforcement portion 63. That is, when the folded containers 1 are stacked, in order to accommodate the long side regulating portion 58 and the short side regulating portion 68 of the lower container 1 in the stacking recess 47 of the upper container 1, at least the positions directly below the long side regulating portion 58 and the short side regulating portion 68 need to be the stacking recess 47. For example, if the inner surface of the long side regulating portion 58 of the container 1 is flush with the inner surface of the long side reinforcement portion 53 of the container 1, it is impossible to provide the support portion 46 up to a position directly below the long side reinforcement portion 53 (provide the support reinforcement protrusion 48). In this case, there is a concern that the connection strength between the long side covering portion 42 and the bottom covering portion 41 will be significantly reduced. In this regard, in this embodiment, a support reinforcement protrusion 48 is provided at the corner portion of the stacking recess 47 so as to protrude the support portion 46 outward from the container 1, and the support reinforcement protrusion 48 is located on the outer side of the container 1 than the inner surface of the container 1 of the long side reinforcement portion 53 (and the short side reinforcement portion 63). This makes it possible to increase the connection strength between the long side covering portion 42 (and the short side covering portion 43) and the bottom covering portion 41, and to prevent situations such as damage and deformation of the connection portion between the long side covering portion 42 (and the short side covering portion 43) and the bottom covering portion 41.

[0068] In addition, by providing the short side regulating portion 68 on the short side covering portion 43, relative displacement between the containers 1 in the longitudinal width direction of the containers 1 can be prevented when the containers 1 are stacked in the folded state, and by providing the short side reinforcing portion 63 on the short side covering portion 43, the strength of the short side regulating portion 68 can be increased. Furthermore, by connecting the long side reinforcing portion 53 and the short side reinforcing portion 63 and connecting the long side regulating portion 58 and the short side regulating portion 68, deformation of the long side covering portion 42 and the short side covering portion 43 can be suppressed in cooperation with each other, and the strength and rigidity of the lower corner member 5 can be increased. In particular, deformation of the long side regulating portion 58 and the short side regulating portion 68 can be more reliably suppressed, and the folded containers 1 can be further stabilized when stacked.

[0069] In addition, the inner surface of the short side regulating portion 68 of the container 1 is configured to be located on the outer side of the container 1 than the inner surface of the short side reinforcing portion 63 of the container 1, and the side of the lower side of the short side side wall portion 8 can be placed on the upper surface of the short side reinforcing portion 63 in the assembled state of the container 1, and when the containers 1 in the folded state are stacked, the support portion 46 of the upper container 1 is configured to face and abut or come close to the inner surface of the container 1 of the short side regulating portion 68 of the lower container 1. Therefore, the upper surface of the short side reinforcing portion 63 can support the lower side of the short side side wall portion 8 in the upright position. Therefore, the short side side wall portion 8 in the upright position can be stabilized, and the assembled state of the container 1 can be stabilized. Furthermore, the short side regulating portion 68 can regulate the outward displacement of the short long side side wall portion 7 in the upright position of the container 1. In addition, a support reinforcement protrusion 48 can be provided that protrudes outward from the container 1 beyond the inner surface of the container 1 of the short side reinforcement portion 63 (and the long side reinforcement portion 53) from the corner portion of the stacking recess 47 of the support portion 46. The support reinforcement protrusion 48 can increase the connection strength between the short side covering portion 43 (and the long side covering portion 42) and the bottom covering portion 41, and can prevent the connection portion between the short side covering portion 43 (and the long side covering portion 42) and the bottom covering portion 41 from being damaged or deformed.

[0070] In addition, in the assembled state of the container 1, the lower part of the side edge of the long side wall portion 7 is located closer to the center in the width direction of the long side side wall portion 7 than the inner surface (and further the protruding portion 22a) of the adjacent short side side wall portion 8. This allows the long side side wall portion 7 to be rotated and displaced relatively smoothly without interfering with the short side side wall portion 8 in the upright position. Furthermore, the lower part of the side edge of the short side side wall portion 8 is located closer to the center in the width direction of the short side side wall portion 8 than the outer surface of the adjacent long side side wall portion 7 (the side edge of the short side side wall portion 8 is located closer to the center in the width direction of the short side side wall portion 8 than the outer surface of the long side reinforcing inner wall portion 54 of the long side reinforcing portion 53). As a result, in the folded state of the container 1, the long-side reinforcement portion 53 and the majority of the thickness range of the short-side sidewall portion 8 are horizontally opposed to each other, while the long-side reinforcement portion 53 can be expanded inward of the container 1 to a range located directly below the long-side sidewall portion 7 in the upright position. Therefore, the thickness of the long-side reinforcement portion 53 can be made as large as possible, and the reinforcing effect of providing the long-side reinforcement portion 53 is further enhanced. Also, as described above, the side portion of the lower edge of the long-side sidewall portion 7 in the upright position can be configured to be placed on the upper surface of the long-side reinforcement portion 53.

[0071] In addition, the short-side sidewall 8 (short-side side reinforcing member 22) has a protrusion 22a that protrudes from a side of the short-side sidewall 8 toward the inside of the container 1. The protrusion 22a can prevent a gap from being formed between the long-side sidewall 7 and the short-side sidewall 8 when the container 1 is in an assembled state. In addition, when the container 1 is in a folded state, the side of the short-side sidewall 8 including the protrusion 22a (the general portion of the short-side side reinforcing member 22 and the protrusion 22a) and the long-side reinforcing portion 53 are configured to face each other and abut or be close to each other in the width direction of the short-side sidewall 8. This enhances the effect of reinforcing the long-side restricting portion 58 by extending the long-side reinforcement portion 53 as far upward as possible, while also increasing the opposing area between the long-side reinforcement portion 53 and the side portion of the short-side sidewall portion 8 in the folded position, thereby stabilizing the folded state of the container 1. Furthermore, in the width direction of the long-side sidewall portion 7, the side portion of the long-side sidewall portion 7 and the inner surface of the short-side reinforcement portion 63 can be spaced apart, and interference between the long-side sidewall portion 7 and the short-side reinforcement portion 63 can be more reliably avoided.

[0072] In addition, the bottom wall portion 2, the long side base portion 3, and the short side base portion 4 are fixed to the bottom cover portion 41, the long side cover portion 42, and the short side cover portion 43 of the lower corner member 5 by rivets as fixing means, respectively. This makes it possible to more reliably prevent the lower corner member 5 from falling off or shifting in position, and thus stabilizes the shape of the container 1, and ultimately stabilizes the state in which containers 1 are stacked together in a specified state.

[0073] The present invention is not limited to the above-described embodiment, and may be implemented as follows: Of course, other applications and modifications not exemplified below are also possible.

[0074] (a) In the above embodiment, the short side wall 8 is configured to overlap the long side wall 7 in the folded state of the container 1, but it is also possible to embody a container in which the long side wall 7 overlaps the short side wall 8 (the short side wall constitutes the first side wall, and the long side wall constitutes the second side wall). In addition, the bottom wall 2 may be substantially square in plan view. In the above embodiment, the height positions of the pair of short side wall portions 8 in the folded state are the same, but for example, the short side wall portions 8 in the folded state may be configured to overlap each other vertically. When a configuration in which the short side wall portions 8 overlap each other vertically is adopted, the long side reinforcement portion 53 extends upward to a position that faces at least a part of the thickness range of the upper short side wall portion 8 in the folded state of the container 1. Furthermore, the pair of long side wall portions 7 in the folded position may be configured to be aligned in height. In the above embodiment, when the folded containers 1 are stacked on top of each other, the containers 1 are oriented in the same direction. However, the "same direction" means a direction in which the outer shapes are the same when viewed in a plane, and which of the pair of long side wall portions 7 is on the upper side is not related to the direction of the container 1.

[0075] (b) In the above embodiment, the entire long-side regulating portion 58 in the width direction of the long-side sidewall portion 7 protrudes upward from the upper surface of the long-side reinforcement portion 53, but it is sufficient that at least a part of the long-side regulating portion 58 is provided so as to protrude upward from the upper surface of the long-side reinforcement portion 53 (for example, the long-side regulating portion 58 may be extended up to the long-side auxiliary upper wall portion 57). Furthermore, the long-side regulating portion 58 and the short-side regulating portion 68 may not be connected to each other, and the long-side reinforcement portion 53 and the short-side reinforcement portion 63 may not be connected to each other.

[0076] (c) In the above embodiment, the support reinforcement protrusions 48 are provided only at the corners of the stacking recess 47, but, for example, the support reinforcement protrusions 48 may be provided so that the support portions 46 protrude outwardly from the container 1 over the entire width direction of the long side reinforcement portions 53 and the entire width direction of the short side reinforcement portions 63 (however, the support reinforcement protrusions 48 may be positioned more inwardly of the container 1 than the inner faces of the long side regulating portions 58 and the short side regulating portions 68).

[0077] In addition, the general portion (part between the support reinforcing protrusion 48 and the long side auxiliary protrusion 49) of the outer periphery of the support part 46 of the upper container 1 may abut against the inner surface of the long side regulating part 58 of the lower container 1, thereby restricting the relative displacement between the containers 1 in the short width direction of the container 1. Furthermore, the general portion (part between the support reinforcing protrusion 48 and the short side auxiliary protrusion 50) of the outer periphery of the support part 46 of the upper container 1 may abut against the inner surface of the short side regulating part 68 of the lower container 1, thereby restricting the relative displacement between the containers 1 in the long width direction of the container 1. The long side auxiliary protrusion 49 and the short side auxiliary protrusion 50 may be omitted. In addition, the upper plate part 44 of the bottom cover part 41 may be omitted.

[0078] (d) In the above embodiment, the long side base portion 3, the short side base portion 4, and the bottom wall portion 2 are fixed to the long side cover portion 42, the short side cover portion 43, and the bottom cover portion 41 of the lower corner member 5 with rivets, respectively, but the structure fixing the bottom wall portion 2 to the bottom cover portion 41 may be omitted, and the structure fixing the long side base portion 3 and the short side base portion 4 to the long side cover portion 42 and the short side cover portion 43 may be omitted. Furthermore, the means for fixing (connecting) separately constructed members (the means for connecting the resin sheet constituting the bottom wall portion 2, etc., to the lower corner member 5, the means for connecting the base portions 3, 4 to the hinge member 6, and the means for connecting the side wall main bodies 11, 21 to the upper connecting members 14, 24, etc.) is not particularly limited, and in addition to the method using rivets, screws, bolts, etc. may be used, the members may be welded or glued, multiple types of fixing means may be appropriately adopted for each portion, or multiple types of fixing means may be used in combination at the same portion. Note that the configuration of the means for connecting the long side wall portion 7 to the short side wall portion 8 in the assembled state of the container 1 is not particularly limited to the lock member 35, etc., and can be appropriately changed.

[0079] (e) Although each component of the container 1 in the above embodiment is made of polypropylene, it may be made of other resin materials such as polyethylene, PET, polyamide, etc. In addition, the resin sheets that make up the bottom wall portion 2, the long side base portion 3, the short side base portion 4, the long side wall main body 11, and the short side wall main body 21 are not particularly limited, and it is also possible to use other resin molded products such as those made of foamed resin, those having a portion in which small cylindrical bodies extending vertically are arranged horizontally and connected to each other to form a sheet, and those having a hollow plate-like body. Furthermore, in the above embodiment, the long side side wall portion 7 and the short side side wall portion 8 are connected to the long side base portion 3 and the short side base portion 4 via the hinge member 6, but, for example, the long side side wall portion 7 and the short side side wall portion 8 may also be composed of part of the same (continuous) resin sheet as the bottom wall portion 2, the long side base portion 3 and the short side base portion 4, and the long side base portion and the long side side wall portion may be rotatably connected via a thin-walled portion serving as a hinge portion (formed, for example, by making a cut in the target portion of the resin sheet or by applying heat to create a recess), and the short side base portion and the short side side wall portion may be rotatably connected via a thin-walled portion serving as a hinge portion. [Explanation of symbols]

[0080] 1...container, 2...bottom wall portion, 3...long side base portion, 4...short side base portion, 5...lower corner member, 6...hinge member, 7...long side side wall portion, 8...short side side wall portion, 21...short side wall main body, 22...short side side reinforcement member, 22a...protrusion, 41...bottom covering portion, 42...long side covering portion, 43...short side covering portion, 52...long side rotation regulating portion, 53...long side reinforcement portion, 58...long side regulating portion, 62...short side rotation regulating portion, 63...short side reinforcement portion, 68...short side regulating portion.

Claims

1. The housing comprises a bottom wall portion having a generally rectangular shape in a plan view, a pair of opposing first base portions extending upward from a pair of opposing first side edges of the bottom wall portion, a pair of opposing second base portions extending upward from a pair of opposing second side edges of the bottom wall portion, a first side wall portion connected to the first base portion via a hinge portion, and a second side wall portion connected to the second base portion via a hinge portion, The first side wall portion and the second side wall portion are configured to be rotatably displaceable between an upright posture in which the first side wall portion and the second side wall portion are erected above the base portions and a folded posture in which the first side wall portion and the second side wall portion are folded down above the bottom wall portion, A container capable of changing between an assembled state in which all of the side wall portions are in the upright position and a folded state in which all of the side wall portions are in the folded position, The bottom wall portion, the first base portion, and the second base portion are configured by folding a single resin sheet, a lower corner member provided so as to be continuous with the first base portion and the second base portion in correspondence with each corner of the bottom wall portion; In the folded state, the second side wall portion is in the folded position above the first side wall portion in the folded position, and the containers in the folded state are configured to be stacked vertically in the same orientation, the lower corner member includes a first cover portion that covers the first base portion and at least a portion of the first side wall portion in the upright position from the outer side of the container, a second cover portion that covers the second base portion and at least a portion of the second side wall portion in the upright position from the outer side of the container, and a bottom cover portion that covers a corner of the bottom wall portion from the lower side or from both the lower side and the upper side, the first cover portion includes a first restricting portion for restricting relative displacement of the upper container in a horizontal direction substantially perpendicular to the first side edge portion when the containers are stacked in the folded state, and a first reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the first restricting portion; At least a portion of the first restricting portion is provided to protrude upward from the first reinforcing portion, and the first reinforcing portion extends upward to a position horizontally opposed to at least a portion of a thickness range of the second side wall portion in the folded state, a surface of the first reinforcing portion on an inner side of the container is located on an inner side of the container than a surface of the first restricting portion on an inner side of the container, and a part of the first side wall portion is configured to be placed on an upper surface of the first reinforcing portion in the assembled state, the second cover portion includes a second regulating portion for regulating relative displacement in a horizontal direction substantially perpendicular to the second side edge portion of the upper stacked container when the containers in the folded state are stacked on top of each other, and a second reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the second regulating portion; At least a portion of the second regulating portion is provided so as to protrude upward from the second reinforcing portion, and a surface of the second reinforcing portion on an inner side of the container is located on an inner side of the container relative to a surface of the second regulating portion on an inner side of the container, the first reinforcing portion and the second reinforcing portion are connected to each other, and the first restricting portion and the second restricting portion are connected to each other, A container characterized in that, in the assembled state, a portion of the second side wall portion is configured to be placed on an upper surface of the second reinforcing portion.

2. The housing comprises a bottom wall portion having a generally rectangular shape in a plan view, a pair of opposing first base portions extending upward from a pair of opposing first side edges of the bottom wall portion, a pair of opposing second base portions extending upward from a pair of opposing second side edges of the bottom wall portion, a first side wall portion connected to the first base portion via a hinge portion, and a second side wall portion connected to the second base portion via a hinge portion, The first side wall portion and the second side wall portion are configured to be rotatably displaceable between an upright posture in which the first side wall portion and the second side wall portion are erected above the base portions and a folded posture in which the first side wall portion and the second side wall portion are folded down above the bottom wall portion, A container capable of changing between an assembled state in which all of the side wall portions are in the upright position and a folded state in which all of the side wall portions are in the folded position, The bottom wall portion, the first base portion, and the second base portion are configured by folding a single resin sheet, a lower corner member provided so as to be continuous with the first base portion and the second base portion in correspondence with each corner of the bottom wall portion; In the folded state, the second side wall portion is in the folded position above the first side wall portion in the folded position, and the containers in the folded state are configured to be stacked vertically in the same orientation, the lower corner member includes a first cover portion that covers the first base portion and at least a portion of the first side wall portion in the upright position from the outer side of the container, a second cover portion that covers the second base portion and at least a portion of the second side wall portion in the upright position from the outer side of the container, and a bottom cover portion that covers a corner of the bottom wall portion from the lower side or from both the lower side and the upper side, the first cover portion includes a first restricting portion for restricting relative displacement of the upper container in a horizontal direction substantially perpendicular to the first side edge portion when the containers are stacked in the folded state, and a first reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the first restricting portion; At least a portion of the first restricting portion is provided to protrude upward from the first reinforcing portion, and the first reinforcing portion extends upward to a position horizontally opposed to at least a portion of a thickness range of the second side wall portion in the folded state, In the assembled state, a lower portion of a side edge of the first side wall portion is located closer to a center portion in a lateral direction of the first side wall portion than an inner surface of the adjacent second side wall portion, and a lower portion of a side edge of the second side wall portion is located closer to a center portion in a lateral direction of the second side wall portion than an outer surface of the adjacent first side wall portion, The second side wall portion includes a protrusion protruding from a side edge portion of the second side wall portion toward an inner side of the container, A container characterized in that in the folded state, in the width direction of the second side wall portion, a side edge portion of the second side wall portion including the protrusion portion and the first reinforcing portion face each other and abut or are close to each other.

3. The housing comprises a bottom wall portion having a generally rectangular shape in a plan view, a pair of opposing first base portions extending upward from a pair of opposing first side edges of the bottom wall portion, a pair of opposing second base portions extending upward from a pair of opposing second side edges of the bottom wall portion, a first side wall portion connected to the first base portion via a hinge portion, and a second side wall portion connected to the second base portion via a hinge portion, The first side wall portion and the second side wall portion are configured to be rotatably displaceable between an upright posture in which the first side wall portion and the second side wall portion are erected above the base portions and a folded posture in which the first side wall portion and the second side wall portion are folded down above the bottom wall portion, A container capable of changing between an assembled state in which all of the side wall portions are in the upright position and a folded state in which all of the side wall portions are in the folded position, The bottom wall portion, the first base portion, and the second base portion are configured by folding a single resin sheet, a lower corner member provided so as to be continuous with the first base portion and the second base portion in correspondence with each corner of the bottom wall portion; In the folded state, the second side wall portion is in the folded position above the first side wall portion in the folded position, and the containers in the folded state are configured to be stacked vertically in the same orientation, the lower corner member includes a first cover portion that covers the first base portion and at least a portion of the first side wall portion in the upright position from the outer side of the container, a second cover portion that covers the second base portion and at least a portion of the second side wall portion in the upright position from the outer side of the container, and a bottom cover portion that covers a corner of the bottom wall portion from the lower side or from both the lower side and the upper side, the first cover portion includes a first restricting portion for restricting relative displacement of the upper container in a horizontal direction substantially perpendicular to the first side edge portion when the containers are stacked in the folded state, and a first reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the first restricting portion; At least a portion of the first restricting portion is provided to protrude upward from the first reinforcing portion, and the first reinforcing portion extends upward to a position horizontally opposed to at least a portion of a thickness range of the second side wall portion in the folded state, a fastening means for fastening the first base portion and the first cover portion of the lower corner member; and a fastening means for fastening the second base portion and the second cover portion of the lower corner member.

4. The surface of the first reinforcing portion facing the inside of the container is located more inwardly of the container than the surface of the first regulating portion facing the inside of the container, and a part of the first side wall portion is configured to be placed on an upper surface of the first reinforcing portion in the assembled state; the second cover portion includes a second regulating portion for regulating relative displacement in a horizontal direction substantially perpendicular to the second side edge portion of the upper stacked container when the containers in the folded state are stacked on top of each other, and a second reinforcing portion protruding upward from the bottom cover portion and having a thickness greater than that of the second regulating portion; At least a portion of the second regulating portion is provided so as to protrude upward from the second reinforcing portion, and a surface of the second reinforcing portion on an inner side of the container is located on an inner side of the container relative to a surface of the second regulating portion on an inner side of the container, the first reinforcing portion and the second reinforcing portion are connected to each other, and the first restricting portion and the second restricting portion are connected to each other, 4. The container according to claim 3, wherein in the assembled state, a part of the second side wall portion is configured to be placed on an upper surface of the second reinforcing portion.

5. A container as described in claim 3 or 4, characterized in that in the assembled state, the lower part of the side edge portion of the first side wall portion is located closer to the center of the width direction of the first side wall portion than the inner surface of the adjacent second side wall portion, and the lower part of the side edge portion of the second side wall portion is located closer to the center of the width direction of the second side wall portion than the outer surface of the adjacent first side wall portion.

6. The second side wall portion includes a protrusion protruding from a side edge portion of the second side wall portion toward an inner side of the container, A container as described in any one of claims 3 to 5, characterized in that in the folded state, a side edge portion of the second side wall portion including the protrusion and the first reinforcement portion face each other and abut or are close to each other in the width direction of the second side wall portion.

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