JP2019189353A - Foldable container - Google Patents

Abstract

To provide a foldable container that can lower a height thereof in a folded state.SOLUTION: A foldable container 1 comprises: a bottom wall constituting part 2 provided with a bottom wall part 3 formed in a nearly rectangular shape in a planar view and base parts 4 at long sides and base parts 5 at short sides respectively protruding upward from respective side parts of the bottom wall part 3; and side wall parts 6 at the long sides and side wall parts 7 at the short sides turnably connected to the base parts 4 and 5 respectively. When the foldable container 1 is brought from a folded state into an assembled state, the side wall parts 6 at the long sides can be displaced into a standing position by displacing a pair of side wall parts 7 at the short sides into a standing position. At both side parts of the side wall part 7 at the short side are provided engagement walls 15 that protrude inward to prevent the side wall part 6 at the long side at the standing position from being displaced outward. In the bottom wall constituting part 2 are provided housing parts 51, into which the engagement walls 15 of the side wall parts 7 at the short sides can be inserted when the side wall parts 7 at the short sides are displaced into a laying position, corresponding to the base parts 4 at the long sides, so that the parts penetrate vertically through the bottom wall constituting part 2.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a folding container used for transporting articles.

  Conventionally, a bottom wall portion having a substantially rectangular shape in plan view, and a bottom wall constituting portion including a base portion protruding upward along each side portion of the bottom wall portion, and each base portion, A side wall portion that is pivotably displaced between a standing position that is erected above each base portion and a laying position that is laid down above the bottom wall portion, and all the side wall portions are in the standing position. There is known a folding container that can be changed between an assembled state and a folded state in which all side wall portions are in a laying position.

  The side wall of the folding container includes a pair of opposing first side walls and a pair of opposing second side walls, and the pair of first side walls when the folding container is changed from the folded state to the assembled state. The second side wall portion cannot be set to the standing position unless the portion is set to the standing position first. Furthermore, both side portions of the first side wall portion protrude from the inner surface of the first side wall portion, and in the assembled state of the folding container, abut against the outer surface of the second side wall portion to prevent outward displacement of the second side wall portion. Support protrusions are provided.

  By the way, folding containers are required to improve transportation and storage efficiency. In this regard, there is a technique in which when the concave portion is provided in the base portion and the first side wall portion is in the laying position, the support protrusion of the first side wall portion can be accommodated in the concave portion (for example, Patent Document 1) reference.).

JP 2001-287738 A

  By adopting the technique of the above-mentioned Patent Document 1, it is possible to avoid a situation in which the support protrusion of the first side wall portion placed in the laying position is in contact with and overlaps the upper side of the base portion, and the folding state of the folding container The height at can be reduced. However, it is also a fact that further improvements are desired regarding the transportation and storage efficiency of the folded container in the folded state.

  The present invention has been made in order to solve the above-described problems and the like, and an object thereof is to provide a folding container capable of reducing the height in the folded state.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means A-1. A bottom wall part having a substantially rectangular shape in plan view, and a bottom wall constituting part comprising a base part provided along each side part of the bottom wall part;
Connected to each base portion of the bottom wall constituting portion so as to be rotatable and displaceable between a standing position standing above each base portion and a laying position lying above the bottom wall portion. A side wall portion,
In a folding container that can change state between an assembled state in which all the side wall portions are in the standing position and a folded state in which all the side wall portions are in the laying position,
The base portion includes a pair of opposing first base portions projecting upward from a pair of opposite side portions of the bottom wall portion, and a pair of opposing portions configured to be lower in height than the first base portion. With a second base of
The side wall portion includes a pair of first side wall portions respectively connected to the first base portions, and a pair of second side wall portions respectively connected to the second base portions.
In the configuration in which the second side wall portion can be set to the upright position by setting the pair of first side wall portions to the upright position when the assembled state is set from the folded state,
Support protrusions protruding from the inner surface of the first side wall are provided on both sides of the first side wall,
In the assembled state, the outer surface side of the second side wall is in contact with or close to the support protrusion of the first side wall,
In the bottom wall constituting portion, in correspondence with the second base portion, when the first side wall portion is in the laying position, a storage portion into which the support protrusion of the first side wall portion can be inserted, A folding container, wherein the folding container is provided so as to vertically penetrate the bottom wall constituting portion.

  According to the means A-1, in the bottom wall constituting portion, there is no portion that is supported by abutting on the surface facing downward in the supporting protrusion of the first side wall portion that is in the laying position. Therefore, it can be avoided that the height position of the first side wall portion at the laying position is determined by the support protrusion being supported. That is, for example, compared to the configuration in which the bottom portion is provided in the housing portion, the support protrusion of the first side wall portion at the laying position can be positioned below, and the entire first side wall portion at the laying position is also as low as possible. Can be positioned. Therefore, since the height position of the surface (outer surface) facing upward in the first side wall portion in the laying position can be kept low, the height of the folding container in the folded state can be lowered, especially When the folded containers in the folded state are stacked (stacked), the height of the stacked folded containers can be made as low as possible. As a result, the transportation / storage efficiency can be improved, for example, the number of folding containers that can be stacked in a limited space can be increased during transportation / storage.

  The “accommodating portion” is intended to be a portion where the support protrusion can be inserted, and does not include a drain hole or the like through which the support protrusion cannot be inserted.

Means A-2. The support protrusion is provided with an engagement hole that penetrates in the width direction of the first side wall,
On the outer surface side of the second side wall portion, an engagement protrusion to be inserted into the engagement hole portion of the support protrusion in the assembled state is provided,
Means A-1 is characterized in that at least the peripheral edge portion of the engagement hole portion of the support protrusion is configured to be larger than the thickness of the plate-like body constituting the first side wall portion. Folding container.

  According to the means A-2, it is possible to increase the strength and rigidity of the support protrusion, and in particular, it is possible to suppress a situation such as deformation of the peripheral edge of the engagement hole. Therefore, by providing the accommodating portion as in the above-described means A-1, the support protrusion of the first side wall portion is exposed on the lower surface side of the folding container in the folded state (the second base portion is in the sleeping position). Even in a configuration in which there is no portion that protects the downwardly facing surface of the support protrusion of one side wall portion, damage or deformation of the support protrusion can be suppressed.

  Further, unlike the above-described means A-1, since the bottom portion is not provided in the housing portion, it is possible to ensure the protrusion length from the first side wall portion of the support protrusion as long as possible, and thus the engagement hole portion. The lateral width of the engaging protrusion can be ensured as large as possible while suppressing a decrease in the strength of the support protrusion provided. Therefore, damage and deformation of the engaging protrusion and the supporting protrusion can be suppressed, and durability can be improved.

Means A-3. Each of the base portions includes a plurality of bearing portions that respectively support a plurality of shaft portions provided on the respective side wall portions,
The folding container according to means A-1 or A-2, wherein in the second base portion, the bearing portion is provided at least near one side of the housing portion.

  According to the means A-3, the strength and rigidity of the peripheral portion, which has been reduced by the provision of the accommodating portion, can be compensated by the bearing portion and, further, the shaft portion connected to the bearing portion.

  In addition, “the vicinity of one side of the housing part” means that the vicinity of the housing part is reinforced by the bearing part, for example, the distance between the housing part and the bearing part is It is exemplified that the width is equal to or less than the width of the accommodating portion.

  In addition, “the surface of the support protrusion of the first side wall portion that is set to the laying position is directed downward, from the same height position as the lower end portion of the accommodating portion, or from the lower end portion of the accommodating portion. Also, it may be configured to be a slightly higher height position (position where the distance less than the wall thickness of the wall portion is separated upward). In this case, the support protrusion of the first side wall portion in the laying position protrudes downward from the housing portion, so that the support protrusion can easily come into contact with another member, or on the folded container in the assembled state. When a folded folding container is placed, it is possible to avoid a situation in which the upper protruding portion of the lower folding container comes into contact with the supporting protruding portion of the upper folding container and the supporting protruding portion is lifted. Can do. Therefore, damage to the support protrusion can be suppressed.

  B. Conventionally, a bottom wall portion having a substantially rectangular shape in plan view, and a bottom wall constituting portion including a base portion protruding upward along each side portion of the bottom wall portion, and each base portion, A side wall portion that is pivotably displaced between a standing position that is erected above each base portion and a laying position that is laid down above the bottom wall portion, and all the side wall portions are in the standing position. There is known a folding container that can be changed between an assembled state and a folded state in which all side wall portions are in a laying position.

  The side wall of the folding container includes a pair of opposing first side walls and a pair of opposing second side walls, and the pair of first side walls when the folding container is changed from the folded state to the assembled state. The second side wall portion cannot be set to the standing position unless the portion is set to the standing position first. Furthermore, both side portions of the first side wall portion protrude from the inner surface of the first side wall portion, and in the assembled state of the folding container, abut against the outer surface of the second side wall portion to prevent outward displacement of the second side wall portion. Support protrusions are provided. In addition, the support protrusion is provided with a recess (engagement portion) that opens toward the center in the width direction of the first side wall, and the outer surface of the second side wall is engaged in the assembled state of the folding container. An engagement protrusion to be inserted into the joint is provided (for example, see Japanese Patent Application Laid-Open No. 2001-287738).

  By the way, it is also a fact that further improvement and the like are desired with respect to the transport / storage efficiency in the folded state of the folding container.

  The present invention has been made in order to solve the above-described problems and the like, and an object thereof is to provide a folding container capable of reducing the height in the folded state.

Means B-1. A bottom wall part having a substantially rectangular shape in plan view, and a bottom wall constituting part comprising a base part provided along each side part of the bottom wall part;
Connected to each base portion of the bottom wall constituting portion so as to be rotatable and displaceable between a standing position standing above each base portion and a laying position lying above the bottom wall portion. A side wall portion,
In a folding container that can change state between an assembled state in which all the side wall portions are in the standing position and a folded state in which all the side wall portions are in the laying position,
The base portion includes a pair of opposing first base portions projecting upward from a pair of opposite side portions of the bottom wall portion, and a pair of opposing portions configured to be lower in height than the first base portion. With a second base of
The side wall portion includes a pair of first side wall portions respectively connected to the first base portions, and a pair of second side wall portions respectively connected to the second base portions.
In the configuration in which the second side wall portion can be set to the upright position by setting the pair of first side wall portions to the upright position when the assembled state is set from the folded state,
Support protrusions protruding from the inner surface of the first side wall are provided on both sides of the first side wall,
In the assembled state, the outer surface side of the second side wall is in contact with or close to the support protrusion of the first side wall,
The support protrusion is provided with an engaging portion that opens to the center side in the width direction of the first side wall,
On the outer surface side of the second side wall portion, an engagement protrusion to be inserted into the engagement portion of the support protrusion in the assembled state is provided,
At least one of the engagement protrusions provided corresponding to each of the support protrusions is provided so as to protrude to the side of the second side wall part from the side part of the second side wall part. A folding container characterized by that.

  According to the means B-1, the thickness of the engaging protrusion (the width in the width direction of the second side wall portion) is sufficiently ensured, and the supporting protrusion includes the engaging portion (opening edge) and the supporting protrusion. The protrusion length from the inner surface of the first side wall portion of the support protrusion portion can be suppressed as short as possible while sufficiently securing the width between the outer peripheral edge portion (tip edge portion). Therefore, while improving the durability of the engaging protrusion and the support protrusion, it is possible to suppress a situation in which the support protrusion increases the height of the folding container when the folding container is folded. can do. As a result, while stabilizing the assembly state of the folding container, the height of the folded container that is in the folded state can be made as low as possible, and the transportation and storage efficiency of the folded container in the folded state is improved. be able to. In particular, in the case of a configuration in which the folding container is carried by placing a hand on the side wall portion of the folding container in an assembled state in which articles are accommodated (when there is a handle on the side wall portion), Thus, the effect of enhancing the durability of the support protrusion and stabilizing the assembled state of the folding container is more remarkably exhibited, and the folding container in which the article is accommodated can be carried more stably.

  Means B-2. A part of the inner surface of the first base part protrudes to the side of the second side wall part from the side part of the second side wall part when the second side wall part is in the sleeping position. The folding container according to means B-1, wherein a base recess into which the engaging protrusion is inserted is provided.

  According to the means B-2, interference between the engaging protrusion and the first base portion can be avoided when the second side wall portion in the standing position is set to the laying position. Therefore, when the folding container is in the folded state, the engaging protrusion is caught on the upper surface or the inner surface of the first base portion, and the engaging protrusion or the like may be damaged, or the second side wall portion may be displaced to the sleeping position. It is not possible to prevent such a situation that the height of the folded container in the folded state becomes high. Furthermore, the strength of the first base portion is reduced by setting a portion of the first base portion that is relatively thin by providing the base concave portion as a part in the extending direction of the first base portion. Can be suppressed.

  Means B-3. The base recess includes a back surface extending in parallel with or substantially parallel to the inner surface of the first side wall portion in the upright position, and the back of the base recess in the inner and outer directions of the folding container in the assembled state. The surface is located at the same position as the inner surface of the first side wall portion in the standing position, or on the inner side of the folding container from the inner surface of the first side wall portion in the standing position. The folding container as described in means B-2.

  According to the means B-3, in the assembled state of the folding container, the inner surface of the first side wall portion is substantially flush with the back surface of the base recess provided in the first base portion, or the folding container than the back surface. It is comprised so that it may be located in the outward side. Thereby, when displacing a 2nd side wall part to a standing position and a laying position, interference with an engaging protrusion and a 1st side wall part can be avoided. Accordingly, when the folding container is in the folded state, the engaging protrusion is caught on the inner surface of the first side wall, causing the workability of the folding container to be folded or assembled, and the engaging protrusion or the like being damaged. Etc. can be prevented.

It is the perspective view which looked at the folding container in an assembly state from the upper surface side. It is the perspective view which looked at the folding container in an assembly state from the lower surface side. It is the perspective view which looked at the folding container in a folded state from the upper surface side. It is the perspective view which looked at the folding container in a folded state from the lower surface side. It is a perspective view which shows the folding container of the state which has one short side wall part in a sleeping position, and has the other short side wall part in a standing position. It is a top view which shows the folding container of the state which has one short side wall part in a sleeping position, and has the other short side wall part in a standing position. It is a side view which shows the folding container of the state which has one short side wall part in a sleeping position, and has the other short side wall part in a standing position. It is a perspective view which shows the outer surface side of a short side wall part. It is a perspective view which shows the outer surface side of a long side wall part. It is the partial expanded side view which looked at the short side wall part from the outer surface side. It is a partial expanded sectional view at the time of cut | disconnecting the connection site | part of a long side wall part and a short side wall part in the position of the AA line of FIG. It is a partial expansion perspective view containing the partial cross section of the folding container in an assembly state. It is sectional drawing of the folding container in a folded state. It is a side view which shows the state which stacked the folding container in a folded state. It is a side view which shows the state which mounted the folding container in a folding state with respect to the folding container in an assembly state. It is a partial expanded sectional view which shows the metal mold | die which shape | molds a short side wall part. It is a partial enlarged plan view which shows the folding container in the folding state in another embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1, 2, etc., the folding container 1 protrudes upward from the bottom wall part 3 along each long side part of the bottom wall part 3 having a substantially rectangular shape in plan view and the bottom wall part 3. A bottom wall constituting portion 2 including a long side base portion 4 and a short side base portion 5 protruding upward from the bottom wall portion 3 along each short side portion of the bottom wall portion 3. . Furthermore, the folding container 1 is rotatably connected to the long-side side wall portion 6 that is rotatably connected to the long-side base portions 4 and the short-side base portion 5, respectively. The short side wall 7 is provided. The bottom wall constituting part 2, the long side wall part 6, and the short side wall part 7 of the present embodiment are made of polypropylene. In the present embodiment, the short side base 5 corresponds to the first base, the long side base 4 corresponds to the second base, and the short side wall 7 corresponds to the first side. And the long side base part 4 is equivalent to a 2nd side wall part.

  Further, as shown in FIGS. 1 and 3, the long side wall 6 and the short side wall 7 stand above the long side base 4 and the short side base 5, respectively. It is comprised so that rotation displacement is possible between the standing position provided and the laying position laid down on the center part side of the bottom wall part 3. Moreover, the protrusion length from the bottom wall part 3 of the long side base part 4 is lower than the protrusion length from the bottom wall part 3 of the short side base part 5, and the long side wall part 6 is rotated. The formation position of the long side bearing portion 8 for supporting the short side wall portion 7 is also positioned below the formation position of the short side bearing portion 9 for rotatably supporting the short side wall portion 7. Furthermore, the lateral width of the short side wall portion 7 is configured to be substantially the same as the short width of the bottom wall constituting portion 2, and the lateral width of the long side wall portion 6 is between the pair of short side base portions 5. It is almost the same as the distance.

  For this reason, in this embodiment, the folding container 1 in the assembly state (see FIG. 1) in which all the long side wall portions 6 and the short side wall portions 7 are in the standing position is used for all the long side walls. When the side wall portion 6 and the short side wall portion 7 are in the folded state (see FIG. 3), as shown in FIG. After the displacement to the laying position, the short side wall 7 is displaced to the laying position. As shown in FIG. 3, when the folding container 1 is in the folded state, the long-side side wall portion 6 that is in the laying position overlaps the upper portion of the bottom wall portion 3, and the short side in the laying position. The side wall 7 is overlapped with the long side wall 6.

  The distance between the pair of long side base portions 4 is longer than twice the vertical width of the long side wall portion 6 (long side base plate 31 described later). For this reason, the height of the laying position of the pair of long side wall portions 6 is made uniform. Furthermore, the distance between the pair of short side base portions 5 is slightly longer than twice the vertical width of the short side wall portion 7 (the short side base plate 11 described later). For this reason, the height of the laying position of the pair of short side wall portions 7 is made uniform.

  Moreover, as shown in FIG. 3 etc., in this embodiment, it protrudes above the long side base part 4 from the both ends of the short side base part 5, and is connected with the upper surface side of the long side base part 4. An auxiliary convex portion 10 is provided. The auxiliary convex portion 10 improves the strength of both end portions of the short side base portion 5 and the like. In addition, as shown in FIG. 13 and the like, the pair of long side wall portions 6 in the laying position are both supported by being in contact with the upper surface of the bottom wall portion 3 and are in the laying position. The side wall portions 7 are configured to be in contact with (or close to) the pair of long side wall portions 6 that are in the laying position, and are supported at the same height position. Moreover, as shown in FIG. 3 etc., the short side base part 5 and the upper side part (upper surface) of the auxiliary convex part 10 are located above the short side wall part 7 in the laying position.

  As shown in FIG. 1, FIG. 8, etc., each short side wall 7 has a short side base plate 11 having a substantially rectangular shape in front view, and a short side side along the upper side of the short side base plate 11. A short side upper frame 12 projecting outward from the base plate 11, a short side lower rib 13 projecting outward from the lower side of the short side base, and a lower side of the short side lower rib 13. And a short-side hinge portion 14 that is pivotally supported by the short-side bearing portion 9. The short-side upper frame portion 12 has a short-side upper-side rib 12a protruding outward from the upper-side portion of the short-side base plate 11, and a short-side at a position spaced a predetermined distance downward from the short-side upper-side rib 12a. The short side upper frame that connects the short side upper frame lower rib 12b extending in parallel with the side upper rib 12a, the lower surface of the short side upper rib 12a, and the upper surface of the short side upper frame lower rib 12b. And a reinforcing rib 12c. In the present embodiment, the short side base plate 11 corresponds to a plate-like body constituting the first side wall portion.

  In addition, as shown in FIGS. 5, 7, 8, etc., the upper side including the upper ends of both side portions of the short side wall portion 7 protrudes inward from the inner surface of the short side base plate 11. An engagement wall 15 is provided as a support protrusion. Each engagement wall 15 is provided with an engagement hole portion 16 (engagement portion) penetrating in the lateral width direction of the short side wall portion 7.

  Further, as shown in FIGS. 1, 10 to 12, and the like, the short side base plate 11 has a short side base at a position close to each engagement wall 15 and the short side upper frame portion 12. By forming a substantially U-shaped slit with respect to the plate 11, an elastic piece 18 constituted by a portion surrounded by the slit, and a locking protrusion 19 projecting inward from the tip of the elastic piece 18. The elastic locking piece 17 provided with these is provided. Each elastic piece 18 is connected to the short side base plate 11 at the center in the width direction of the short side wall 7 and is configured to be elastically deformable in the thickness direction of the short side wall 7. The inner surface of the elastic piece 18 is flush with the inner surface of the short side base plate 11, and the locking projection 19 protrudes inward from the inner surface of the short side base plate 11.

  As shown in FIG. 11 and the like, the locking projection 19 has an acute horizontal cross section, and the surface of the locking projection 19 on the lateral side central portion side of the short side wall portion 7 is the short side wall. Inclining and extending inward toward the side portion of the portion 7, the surface of the locking projection 19 on the side portion of the short side wall portion 7 is orthogonal to the short side base plate 11. Extending in the direction. Furthermore, as shown in FIG. 8 etc., on the outer surface side of the elastic locking piece 17, locking reinforcing ribs 20 extending along the upper side portion and the lower side portion of the elastic locking piece 17 are provided. In addition, as shown in FIG. 11 and the like, the back surface side (outer surface side) of the locking projection 19 is formed into a hollow shape, and the locking reinforcing rib 20 is also connected to the back surface side of the locking projection 19. Has been. In addition, the protrusion length from the back surface of the elastic piece 18 of the latching reinforcement rib 20 of this embodiment and the latching protrusion 19 is a protrusion direction intermediate position from the connection part with the short side base plate 11 of the elastic latching piece 17. FIG. The portion including the elastic locking piece 17 is shorter than the portion on the base portion side of the elastic locking piece 17, and the portion on the distal end side of the elastic locking piece 17 is longer than the portion on the base portion side of the elastic locking piece 17. ing.

  As shown in FIG. 8, the short side hinge portion 14 includes a hinge main body 21 protruding downward from the lower surface of the short side lower rib 13, and both side surfaces of the hinge main body 21 in the lateral width direction of the short side wall portion 7. And a pair of axial protrusions 22 protruding laterally from the lower end. In addition, on the outer surface side of the short side wall portion 7, the short side upper frame portion 12 and the short side lower rib 13 are provided on the lateral side central portion side of the short side wall portion 7 of each elastic locking piece 17. Short side vertical ribs 23 are provided to connect the two. Further, the short side base plate 11 is a bulge that bulges outward in a range surrounded by the short side upper frame portion 12, the short side lower rib 13 and the pair of left and right short side vertical ribs 23. An exit 24 is provided. The outer peripheral portion of the bulging portion 24 extends in an inclined manner, and there is a gap between the upper surface of the bulging portion 24 and the short side upper frame portion 12 and between the lower surface of the bulging portion 24 and the short side lower rib. They are appropriately connected by ribs. In the present embodiment, the outer edge of the short side upper frame portion 12, the short side lower rib 13, and the short side vertical rib 23, and the outer surface of the bulging portion 24, The outer surface is configured. Moreover, the inner surface of the short side wall portion 7 is constituted by the inner surface of the short side base plate 11 other than the bulging portion 24 (see FIG. 5 and the like). The thickness of the short side wall 7 is between the outer surface and the inner surface of the short side wall 7.

  As shown in FIG. 1, FIG. 9, etc., each long side wall 6 has a long side base plate 31 that is substantially rectangular in a front view, and a long side side along the upper side of the long side base plate 31. A long-side upper frame portion 32 that protrudes outward from the base plate 31, a long-side lower-side rib 33 that protrudes outward from the lower-side portion of the long-side base plate 31, and a long-side lower-side rib 33 A long-side hinge portion 34 that protrudes downward from the lower surface and is pivotally supported by the long-side bearing portion 8 is provided. The long-side upper frame portion 32 also includes two rows of upper and lower ribs and ribs that connect the upper and lower ribs, similarly to the short-side upper frame portion 12. Further, like the short side base plate 11, the long side base plate 31 includes a bulging portion that bulges outward in a range including the central portion thereof. In addition, the long side hinge portion 34 includes a hinge main body 35 and a shaft protrusion 36, similarly to the short side hinge portion 14. In this example, there is also a long side hinge portion 34 in which the shaft protrusion 36 is provided only on one side of the hinge body 35. Moreover, in this embodiment, the long side hinge part 34 (especially axial protrusion 36) comprises a shaft part.

  Further, engaging protrusions 37 that protrude from the outer surface of the long side base plate 31 are provided on the upper portions of both side portions of the long side wall portion 6. And after displacing the short side wall part 7 to the standing position as shown in FIG. 5, the long side wall part 6 is displaced to the standing position as shown in FIG. Thus, the engagement protrusion 37 is inserted into the engagement hole 16 provided in the engagement wall 15 of the short side wall 7 and, as shown in FIGS. The outer surface of the side wall 6 on the long side is around or close to the engagement wall 15. With this configuration, tilting displacement to the outside of the long side wall portion 6 in the standing position is prevented, and positional deviation in the vertical direction between the long side wall portion 6 and the short side wall portion 7 is prevented. It is to be prevented.

  Further, immediately before the long side wall portion 6 is set to the upright position, the side portion of the outer surface of the long side wall portion 6 contacts the locking protrusion 19 of the elastic locking piece 17 of the short side wall portion 7. To do. At this time, the elastic piece 18 of the elastic locking piece 17 is elastically deformed outward, so that the long side wall portion 6 can be displaced to the standing position as it is. Then, when the long side wall 6 is displaced to the standing position beyond the locking projection 19, the elastic locking piece 17 returns to its original posture by its own elastic force, and the locking projection 19 is moved to the long side. The long side base plate 31 of the side wall 6 is in contact with or close to the inner surface. With this configuration, inward tilting displacement of the long side wall 6 at the standing position is prevented.

  As shown in FIG. 5, in the present embodiment, only the engagement wall 15 protrudes inward from the inner surface of the short side base plate 11 on both sides of the short side wall portion 7, but short. Base convex portions 38 that slightly protrude inward from the whole in the vertical width direction are provided on both side portions of the inner surface of the side base plate 11, and the engagement wall 15 projects from the base convex portion 38. In the width direction of the short side wall 7, the width of the base convex portion 38 is wider than the width of the engagement wall 15, and in this embodiment, has the same length as the thickness of the long side base 4.

  On the other hand, as shown in FIG. 9, the engagement protrusions 37 of the long side wall 6 protrude slightly from the side of the long side base plate 31. In addition, the engagement protrusion 37 of this embodiment is located below the main engagement protrusion 37, the engagement protrusion 37, and the side and side surfaces of the long side wall 6. However, there is a sub-engagement projection 37 connected to a rib provided on the outer surface side of the long side wall 6, but it protrudes to the side from the side of the long side base plate 31. This has a configuration relating to a main engagement protrusion 37 (hereinafter also referred to as “main protrusion 37A”).

  As shown in FIG. 5, on the inner surface side of the short side base portion 5, when the long side wall portion 6 is in the laying position, it protrudes slightly to the side than the side portion of the long side base plate 31. A base recess 5A into which the engaging protrusion 37 (main protrusion 37A) is inserted is provided. That is, the distance between the pair of short-side base portions 5 is substantially the same as the lateral width of the long-side base plate 31 (see FIG. 6 and the like), and the main protrusion 37A is located on the long-side base plate 31 side. If it protrudes to the side of the long side base plate 31 from the side, the main protrusion 37A may interfere with the short side base 5 when the long side wall 6 is set to the sleeping position. It is done. In this respect, by providing the base recess 5A, interference between the main protrusion 37A and the short side base part 5 is avoided, and the long side wall part 6 including the main protrusion 37A is replaced with a pair of short side base parts 5. It can be inserted between. In addition, the base recess 5A is formed only in a portion corresponding to the main projection 37A when the pair of long-side side wall portions 6 are set to the sleeping position among the inner surfaces of the short-side base portion 5. For this reason, basically, the inner surface of the short-side base 5 and the side surface of the long-side side wall 6 (the side-side portion of the long-side base plate 31) placed in the laying position are in contact with each other, or Are placed in close proximity.

  Further, as shown in FIG. 1 and the like, the base recess 5A is located on the outer side of the inner surface of the short side base portion 5, and is parallel to or substantially the inner surface of the short side wall portion 7 in the standing position. A rear surface 5B extending in parallel is provided. In addition, although the lower edge part of the base recessed part 5A of this embodiment is located slightly above the upper surface of the bottom wall part 3 (bottom plate part 41), the lower edge part of the base recessed part 5A is the bottom wall part 3. You may be made the same height position as (bottom plate part 41). Furthermore, in this embodiment, the space between the side edge portion and the lower edge portion of the back surface 5B and the inner surface of the short side base portion 5 is on the inner side of the folding container 1 from the peripheral edge portion of the back surface 5B. Although it connects with the inclined surface which inclines in the outer peripheral direction of the back surface 5B toward, you may comprise so that it may connect with the surface substantially orthogonal to the inner surface of the short side base part 5. FIG. In addition, the shape of the portion of the main projection 37A on the inner surface side of the long side wall portion 6 is a shape that does not interfere with the base recess 5A in the folded state of the folding container 1.

  Furthermore, as shown in FIG. 5, the long side of the short side wall portion 7 is a region around the engaging wall 15 provided with the base convex portion 38 protruding inward from the inner surface of the short side base plate 11. For the portion corresponding to the main protrusion 37A protruding sideward from the side portion of the side base plate 31, the base protrusion 38 is omitted so that the main protrusion 37A can be inserted into the engagement hole portion 16. It has become. More specifically, in the inner and outer directions of the folding container 1 in the assembled state, the back surface 5B of the base recess 5A is the inner surface of the short side wall portion 7 in the standing position (the inner surface of the short side base plate 11). The positions are almost the same (designed such that the same position or the back surface 5B is slightly inward of the folding container 1 with respect to the inner surface of the short side wall 7). Further, as described above, the base convex portion 38 is provided in the peripheral portion of the engaging wall 15, but when the long side wall portion 6 is displaced between the open position and the closed position, the main protrusion 37A. A part of the base convex portion 38 is omitted on the track of the main projection 37A through which the main projection 37A passes (so as to prevent the main projection 37A from being obstructed). So that the recess 38A is flush with the inner surface of the short side wall 7 (short side base plate 11) or slightly outside the inner surface of the short side wall 7. ).

  As described above, the strength of the both side portions of the short side wall portion 7 is improved by the base convex portion 38 and the main protrusion 37 </ b> A is protruded laterally from the side portion of the long side base plate 31. Accordingly, it is possible to suppress the strength reduction of the peripheral portion of the engagement hole portion 16 while increasing the lateral width of the engagement projection 37 as much as possible without increasing the protrusion length of the engagement wall 15. Further, a base recess 5A is provided on the inner surface side of the short side base portion 5, and the inner surface of the short side wall portion 7 (when at least the long side wall portion 6 is displaced between the open position and the closed position). The portion corresponding to the trajectory of the main projection 37A is substantially flush with the inner surface 5B of the base recess 5A, so that the main projection 37A protrudes laterally from the side portion of the long side base plate 31. Even in such a configuration, the long side wall portion 6 can be displaced relatively smoothly. In addition, in the inner and outer directions of the folding container 1 in the assembled state, the back surface 5B of the base recess 5A is configured to be located on the inner side of the folding container 1 with respect to the inner surface of the short side wall portion 7 in the standing position. It is also possible.

  As shown in FIGS. 1, 4, and 13, the bottom wall portion 3 of the bottom wall constituting portion 2 includes a bottom plate portion 41 having a substantially rectangular plate shape, and the folding containers 1 in an assembled state among the bottom plate portions 41. When stacked vertically (tiered), the outer peripheral corresponding portion 42 (the upper surface side of the bottom wall portion 3) is a portion supported by contacting the upper side portions of the side wall portions 6, 7 of the lower folding container 1. , And a support part 43 having a substantially lattice shape in a bottom view protruding downward from a part on the inner peripheral side with respect to a part on which the long side base part 4 and the short side base part 5 are provided. With this configuration, when the folding containers 1 in an assembled state are stacked, the support part 43 of the upper folding container 1 is inserted into the inner peripheral side of the side wall parts 6 and 7 of the lower folding container 1. The outer peripheral corresponding portion 42 of the upper folding container 1 is supported in contact with the upper side portions of the side wall portions 6 and 7 of the lower folding container 1. As shown in FIG. 13 and the like, the bottom plate portion 41 of the present embodiment is configured such that the outer periphery corresponding portion 42 is positioned above the inner peripheral portion. Moreover, in this embodiment, since the metal mold | die which shape | molds the inner space of the long side base part 4 and the short side base part 5 is die-cut downward via the outer periphery corresponding part 42, it corresponds to an outer periphery. The portion 42 basically remains only in a rib shape (see FIG. 4 and the like).

  Further, as shown in FIG. 14, when the folding containers 1 in a folded state are stacked, the support part 43 of the upper folding container 1 is connected to the pair of short side base parts 5 of the lower folding container 1. And the outer peripheral corresponding portion of the upper folding container 1 while being inserted into a space (see FIG. 3) between the auxiliary convex portions 10 provided corresponding to both ends of each short side base portion 5. 42 is abutted against and supported by the upper side portion of the short side base portion 5 of the lower folding container 1. In particular, in this embodiment, in a state where the folding containers 1 in a folded state are stacked, the lower side of the support portion 43 of the upper folding container 1 and the short side where the lower folding container 1 is laid down It is comprised so that the outer surface which faces the upper side among the side wall parts 7 may adjoin (or contact | abut).

  As shown in FIGS. 5, 6, etc., the long-side bearing portion 8 is opened upward and on the inner peripheral side of the bottom wall portion 3, so that the hinge main body 35 of the long-side hinge portion 34 can be inserted. The shaft projection 36 of the long side hinge portion 34 is configured to be insertable, restricting displacement of the shaft projection 36 toward the inner peripheral side of the bottom wall portion 3, and rotating the shaft projection 36. And a shaft support 45 that allows displacement. Further, the shaft support 45 is provided with a retaining protrusion 46 that prevents the shaft protrusion 36 inserted into the shaft support 45 from coming off from the shaft support 45. In the present embodiment, four long side bearing portions 8 are provided in each long side base portion 4.

  In addition, the short side bearing portion 9 is also provided with an insertion portion 44, a shaft support portion 45, and a retaining protrusion 46, similar to the long side bearing portion 8. In the present embodiment, each short side base portion 5 is provided with four short side bearing portions 9.

  Now, as shown in FIGS. 4, 5, etc., the bottom wall constituting portion 2 corresponds to the long side base portion 4, and when the short side wall portion 7 is in the sleeping position, the short side wall An accommodating portion 51 into which the engaging wall 15 of the portion 7 can be inserted is provided. The accommodating part 51 of this embodiment is provided so that it may open to the outer peripheral side of the bottom wall structure part 2, and may penetrate the bottom wall structure part 2 up and down. The thickness of the engagement wall 15 is configured to be smaller than the thickness of the long side base portion 4, and in a state where the engagement wall 15 is accommodated in the accommodation portion 51, the outer surface of the engagement wall 15 and the long side base portion are included. The outer surface of 4 is substantially flush.

  Moreover, as shown in FIG. 5, about the site | part in which the short side wall part 7 (base convex part 38) made into the laying position among the upper surfaces of the long side base part 4 is mounted from other site | parts. Is a step portion 52 located slightly below. In the present embodiment, the short side wall portion 7 is placed in the laying position, so that the inner surface side (base convex portion 38) of the short side wall portion 7 is the upper surface (step portion 52) of the long side base portion 4. And a protrusion direction front end portion of the engaging wall 15 inserted into the accommodating portion 51 (a side portion facing downward when the short side wall portion 7 is in the laying position). The bottom plate portion 41 (outer periphery corresponding portion 42) of the bottom wall portion 3 is positioned flush with the lower surface of the bottom plate portion 41 or slightly above the lower surface (see FIGS. 4 and 14). For this reason, as shown in FIG. 15, when the folded container 1 in the folded state is placed on the upper side of the folded container 1 in the assembled state, the engagement of the short side wall portion 7 that is the laying position of the upper folded container 1. Although the joint wall 15 and the upper side portions of the side wall portions 6 and 7 of the lower folding container 1 are in contact with each other or close to each other, the engaging wall 15 of the upper folding container 1 is connected to the lower folding container 1. A situation in which the short side wall 7 of the upper folding container 1 is displaced upward relative to the bottom wall constituting part 2 of the upper folding container 1 by being pressed upward by the side walls 6, 7. Is to be avoided.

  In addition, as shown in FIG. 13, in the present embodiment, the outer side (surface facing upward) and the inner surface (surface facing downward) of the short-side side wall portion 7 in the laying position are provided. , Extending in a substantially horizontal direction. Further, the outer surface and the inner surface of the long side wall portion 6 set as the laying position also extend in a substantially horizontal direction, and the inner surface of the short side wall portion 7 set as the laying position is the length set as the laying position. It comes close to the outer surface of the side wall portion 6. In addition, it is also possible to comprise so that the inner surface of the short side wall part 7 made into the sleeping position may contact | abut with the outer surface of the long side wall part 6 made into the sleeping position. However, even if the protrusion direction front end portion of the engaging wall 15 of the short side wall portion 7 that is in the laying position is positioned above the lower surface of the outer peripheral corresponding portion 42, the distance from the lower surface of the outer peripheral corresponding portion 42 is In addition, the thickness is less than the wall thickness of each wall portion (such as the accommodating portion 51) of the bottom wall constituting portion 2.

  Moreover, as shown in FIG. 5 etc., in the engagement wall 15, the thickness of the peripheral part of the engagement hole part 16 is comprised thicker than the thickness of another site | part. Furthermore, as shown in FIG. 11, in the present embodiment, the thickness (W1) of the peripheral edge portion of the engagement hole 16 in the engagement wall 15 is the short side base plate 11 constituting the short side wall 7. It is larger than the thickness (W2). In addition, as shown in FIG. 5 and FIG. 6, in the long side base portion 4, between each accommodating portion 51 and both ends of the long side side base portion 4 (short side side base portion 5), A long side bearing portion 8 is provided. In the present embodiment, the long side bearing portion 8 and the accommodating portion 51 are disposed close to each other, and the distance between the accommodating portion 51 and the long side bearing portion 8 is larger than the lateral width of the accommodating portion 51. It is shorter and shorter than the lateral width of the long side bearing portion 8.

  Further, as shown in FIGS. 8 and 10 to 12, the short side wall portion 7 of the present embodiment is arranged outside the folding container 1 of the elastic locking piece 17, and outside the folding container 1. There is provided a stopper portion 53 that abuts against the elastic locking piece 17 that has undergone a certain amount of deformation and restricts further deformation. More specifically, the short side wall portion 7 includes an outer end edge of the short side upper frame portion 12 and a short side side lower side rib 13 on both sides on the outer surface side of the short side wall portion 7. A corner wall portion 54 that connects the outer edge is provided, and the stopper portion 53 extends from a portion of the corner wall portion 54 corresponding to the elastic locking piece 17 in the vertical direction to the short side wall portion 7. Projecting toward the center in the width direction. As shown in FIG. 11, the stopper portion 53 is configured to be thicker than the corner wall portion 54, and looks like it protrudes inward of the folding container 1 (the elastic locking piece 17 side) from the corner wall portion 54. ing.

  When the folding container 1 in the assembled state is to be folded, the elastic locking piece 17 is pressed outward from the inside of the folding container 1. Then, the elastic piece 18 is elastically deformed to a position where the locking protrusion 19 does not come into contact with the long side wall portion 6, thereby restricting the inward displacement of the long side wall portion 6 by the elastic locking piece 17. The locked state to be released is released, and the long side wall portion 6 can be displaced to the laying position side. Further, when the elastic piece 18 is deformed by a certain amount when the elastic locking piece 17 is elastically deformed outward, the stopper portion 53 comes into contact with the outer surface of the elastic locking piece 17 on the distal end side. It is like that. Of course, when the stopper portion 53 and the elastic locking piece 17 are in contact with each other, the locked state of the elastic locking piece 17 is released, and the elastic piece 18 is deformed so as not to exceed the elastic limit. It comes to fit.

  In addition, as shown in FIGS. 10 and 11, the elastic piece 18 extends in parallel with the short side base plate 11, and the stopper portion 53 also extends in parallel with the short side base plate 11. Therefore, in the thickness direction of the short side wall portion 7, the portion including the central portion in the vertical width direction of the tip portion of the elastic locking piece 17 and the stopper portion 53 are overlapped. Thereby, it is comprised so that the outer surface of the front-end | tip part side of the elastic latching piece 17 elastically deformed and the stopper part 53 can contact | abut. Furthermore, as shown in FIG. 10, the vertical width of the stopper portion 53 is shorter than the vertical width of the elastic locking piece 17, and when the elastic locking piece 17 is elastically deformed outward by a certain amount, the stopper portion 53 is In the outer surface of the elastic piece 18, it comes into contact with a portion between the pair of upper and lower locking reinforcement ribs 20 provided on the outer surface side of the elastic locking piece 17 (not in contact with the locking reinforcement rib 20). It has become.

  Further, as shown in FIGS. 8, 11, 12, and the like, the short side wall 7 has a space between the elastic locking piece 17 and the stopper 53 in the side of the short side wall 7. An opening 55 is provided to be opened. In the present embodiment, corner reinforcing ribs 56 that connect the corner wall portion 54 and the short side base plate 11 are provided at substantially the same height as the upper side portion and the lower side portion of the elastic locking piece 17. In addition, the opening 55 is defined by the pair of upper and lower corner reinforcing ribs 56, the corner wall portion 54, and the short side base plate 11, and a space between the elastic locking piece 17 and the stopper portion 53. It comes to communicate with. In addition, the opening 55 extends (horizontally) along the lateral width direction of the short side wall portion 7, similarly to the engagement hole portion 16 provided in the engagement wall 15.

  In addition, as shown in FIG. 16, the portions where the elastic locking piece 17 and the stopper portion 53 are opposed to each other (the outer surface on the distal end side of the elastic locking piece 17 and the inner surface of the stopper portion 53) In the mold apparatus 58 for molding the short side wall 7, the mold 59 is molded by a mold 59 for molding the outer surface side of the engagement wall 15, the engagement hole 16 passing through the engagement wall 15, and the like.

  As described above in detail, according to the present embodiment, the bottom wall constituting portion 2 is provided with the engagement wall 15 of the short side wall portion 7 in the laying position corresponding to the long side base portion 4. An insertable accommodating portion 51 is provided so as to penetrate the bottom wall constituting portion 2 vertically. For this reason, in the bottom wall structure part 2, the site | part which contact | abuts and supports the surface which has faced below among the engagement walls 15 of the short side wall part 7 made into the sleeping position will be lost. Therefore, it can be avoided that the height position of the short side wall 7 at the laying position is determined by supporting the engaging wall 15. That is, for example, the engagement wall 15 of the short side wall 7 at the laying position can be positioned lower than the configuration in which the housing 51 is provided with a bottom, and the short side wall 7 at the laying position can be positioned downward. The whole can be positioned as low as possible. Therefore, the height of the folding container 1 in the folded state can be lowered as much as the height position of the surface (outer surface) facing upward in the short side wall portion 7 in the laying position can be kept low. In particular, when stacking the folded containers 1 in a folded state, the height of the stacked folded containers 1 can be made as low as possible. As a result, the transportation / storage efficiency can be improved, for example, the number of folding containers 1 that can be stacked in a limited space can be increased during transportation / storage.

  Further, the peripheral edge of the engagement hole 16 in the engagement wall 15 is configured to be larger than the thickness of the short side base plate 11. For this reason, the intensity | strength and rigidity of the engagement wall 15 can be improved and the situation where the peripheral part of the engagement hole part 16 deform | transforms especially can be suppressed. Therefore, by providing the accommodating portion 51 as described above, the engagement wall 15 of the short side wall portion 7 is exposed on the lower surface side of the folding container 1 in the folded state (in the long side base portion 4). Even in a configuration in which there is no portion that protects the downward facing surface of the engaging wall 15 of the short side wall 7 at the laying position), the damage or deformation of the engaging wall 15 can be suppressed. it can. In addition, the portion connected to the engagement wall 15 in the short side base plate 11 is also thickened by providing the base convex portion 38 (see FIG. 11). The tilt displacement of the wall 15 can be prevented. The thickness of the peripheral edge of the engagement hole 16 of the engagement wall 15 is thicker than the thickness of the short side base plate 11 at the portion where the base convex portion 38 is provided.

  Furthermore, since the bottom portion is not provided in the accommodating portion 51 as described above, the protruding length from the short-side side wall portion 7 of the engaging wall 15 can be ensured as long as possible. The lateral width of the engagement protrusion 37 can be ensured as large as possible while suppressing a decrease in strength of the engagement wall 15 provided with 16. Accordingly, it is possible to prevent damage and deformation of the engagement protrusion 37 and the engagement wall 15 and improve durability.

  In addition, in each long side base part 4, each storage part 51, the long side bearing part 8 provided between both ends of the long side base part 4, and each storage part 51 are close to each other. Is provided. For this reason, the strength and rigidity of the peripheral portion, which has been reduced by the provision of the accommodating portion 51, are compensated by the long side bearing portion 8 and further by the long side hinge portion 34 connected to the long side bearing portion 8. be able to.

  Further, the surface of the engagement wall 15 of the short side wall 7 that is in the laying position is directed downward, and is located at the same height as the lower end of the housing 51 or the lower end of the housing 51. It is configured to be a slightly upper height position (a position where the distance less than the wall thickness of the wall portion 51 is separated upward). For this reason, the engaging wall 15 of the short side wall portion 7 in the laying position protrudes downward from the accommodating portion 51 so that the engaging wall 15 can easily come into contact with another member, or in an assembled state. When the folded folding container 1 is placed on the folding container 1, the upper side of the long side wall 6 of the lower folding container 1 abuts on the engaging wall 15 of the upper folding container 1. A situation in which the engagement wall 15 is lifted can be avoided. Therefore, damage to the engaging wall 15 can be suppressed. Further, even when the configuration (the lower surface of the engaging wall 15 of the short side wall 7 that is in the laying position and the lower end of the housing 51 are at the same height position) is employed, for example, the housing 51 Compared to the configuration in which the bottom is provided, the engagement wall 15 of the short side wall 7 that is the laying position by the thickness of the bottom can be positioned below. Therefore, the effects such as positioning the short side wall 7 at the laying position downward as much as possible and ensuring the projection length of the engagement wall 15 from the short side wall 7 as much as possible are reliably exhibited.

  In the present embodiment, the upper engagement protrusion 37 (main protrusion 37A) of the pair of upper and lower engagement protrusions 37 provided corresponding to each engagement wall 15 is the long side wall portion 6 (long The side base plate 31) is provided so as to protrude to the side of the long side wall 6 from the side. For this reason, the thickness of the main projection 37A (the width in the lateral width direction of the long side wall portion 6) is sufficiently secured, and the engagement hole 15 (opening edge) and the engagement wall 15 in the engagement wall 15 are secured. The protrusion length from the inner surface of the short side wall 7 (short side base plate 11) of the engagement wall 15 is kept as short as possible while ensuring a sufficient width between the outer peripheral edge (tip edge). be able to. Accordingly, when the folding container 1 is in the folded state while improving the durability of the main projection 37A and the engaging wall 15, the engaging wall 15 becomes a factor for increasing the height of the folding container 1. Such a situation can be suppressed. As a result, the height of the folded container 1 can be reduced as much as possible while stabilizing the assembled state of the folded container 1, and the transport and storage efficiency of the folded container 1 in the folded state can be improved. Etc. can be achieved. In particular, the folding container 1 is put on the side wall parts 6 and 7 of the folding container 1 in an assembled state in which articles are accommodated (holding the short side upper frame part 12 or the long side upper frame part 32). In the case of a configuration in which the container is carried, the effect of enhancing the durability of the engagement protrusion 37 and the engagement wall 15 and stabilizing the assembled state of the folding container 1 is more remarkably achieved. The accommodated folding container 1 can be carried more stably.

  Furthermore, a part of the inner surface of the short side base part 5 is provided with a base concave part 5A into which the main protrusion 37A is inserted when the long side wall part 6 is in the laying position. For this reason, when making the long side wall part 6 in a standing position into a sleeping position, interference with the main protrusion 37A and the short side base part 5 can be avoided. Therefore, when the folding container 1 is in the folded state, the main protrusion 37A is caught on the upper surface or the inner surface of the short side base 5 and the main protrusion 37A is damaged, or the long side wall 6 is laid down. Therefore, it is possible to prevent a situation in which the height of the folded container 1 that has been folded is increased. Furthermore, the short side base is formed by setting a portion of the short side base portion 5 that is relatively thin by providing the base concave portion 5A as a part in the extending direction of the short side base portion 5. A decrease in the strength of the portion 5 can be suppressed.

  In addition, the base concave portion 5A includes a rear surface 5B extending in parallel with or substantially parallel to the inner surface of the short side wall portion 7 in the standing position, and the base concave portion in the inner and outer directions of the folding container 1 in the assembled state. The back surface 5B of 5A is substantially the same position as the inner surface of the short side wall portion 7 in the standing position. That is, in the assembled state of the folding container 1, the inner surface of the short side wall portion 7 is configured to be substantially flush with the inner surface 5 </ b> B of the base recess 5 </ b> A provided in the short side base portion 5. Thereby, when displacing the long side wall portion 6 between the standing position and the laying position, interference between the main projection 37A and the short side wall portion 7 can be avoided. Therefore, when the folding container 1 is in the folded state, the main protrusion 37A is caught on the inner surface of the short side wall 7 and the workability when the folding container 1 is folded or assembled is reduced. It is possible to prevent a situation such as damage.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the engagement hole 16 provided in the engagement wall 15 and the engagement protrusion 37 inserted into the engagement hole 16 may be omitted. However, in order to stabilize the assembly state of the folding container 1, it is desirable to provide the engagement hole 16 and the engagement protrusion 37. In the above embodiment, the side portion of the long side wall portion 6 (long side base plate 31) is configured to be substantially linear. It may be formed. In addition, the main protrusion 37A is provided corresponding to the portion of the side part of the long side base plate 31 that is located closest to the side of the long side wall part 6, so that the protrusion length of the engagement wall 15 is increased. The effect of shortening as much as possible is further exhibited.

  In addition, a configuration in which the engagement hole portion 16 into which the engagement protrusion 37 is inserted and engaged does not penetrate the engagement wall 15 (for example, the lateral side of the short side wall portion 7 of the engagement hole portion 16 in the lateral direction). The side portion may be closed, and may be opened (concave shape) in the central portion in the lateral width direction of the short side wall portion 7. However, by penetrating the portion, the engagement protrusion 37 is inserted and engaged. The outer surface of the engagement wall 15 can be molded by the mold 59 that molds the outer surface and the like, and the complexity of the mold structure can be suppressed.

  Moreover, although the arrangement | positioning of the elastic locking piece 17 in an up-down direction is not specifically limited, Considering stabilization of a locked state and operativity at the time of releasing a locked state, it is desirable to provide as much as possible. In addition, although the locking protrusion 19 of the elastic locking piece 17 has a hollow shape, it may be configured not to provide such a recess. Further, the arrangement of the engagement wall 15 in the vertical direction is not particularly limited, but it is desirable that the engagement wall 15 is provided on the upper side as much as possible in order to stabilize the assembly state of the folding container 1. In addition, in the said embodiment, although it is comprised so that thickness may differ partially in the engagement wall 15, you may comprise so that all may be the same thickness.

  Moreover, in the said embodiment, although the stopper part 53 is comprised so that contact | abutting with the front-end | tip part side of the elastic locking piece 17 is carried out, it replaces with this structure or in addition, for example, the elastic locking piece 17 You may comprise so that it can contact | abut with the base part side (or protrusion direction intermediate part). Furthermore, in the above-described embodiment, the elastic piece 18 of the elastic locking piece 17 is configured such that the end of the short side wall portion 7 on the side in the horizontal width direction is connected to the short side base plate 11. The upper end portion or the lower end portion of the elastic piece 18 may be connected to the short side base plate 11. In addition, in the said embodiment, it is good also as providing the recessed part which can accommodate the latching protrusion 19 of the elastic latching piece 17 with respect to the inner surface side of the long side wall part 6. FIG.

  Moreover, in the said embodiment, although comprised so that the inclining displacement to the inward of the long side wall part 6 in a standing position may be prevented by the elastic locking piece 17, it replaces with the elastic locking piece 17, For example, when the folding container 1 is in an assembled state, the engagement state is engaged with the short side wall portion 7 and the engagement state is released when the folding container 1 is in an assembled state. A configuration in which a lock mechanism capable of changing to a state is provided on the outer surface side of the long side wall 6 (the short side wall 7 is set to the upright position when the folding container 1 is assembled). It is also possible to adopt.

  (B) In the above-described embodiment, the forward end portion of the engagement wall 15 of the short side wall 7 that is in the laying position (when the short side wall 7 is in the laying position, it faces downward. The side portion is configured to be flush with the lower surface of the bottom plate portion 41 (outer periphery corresponding portion 42) of the bottom wall portion 3 or slightly above the lower surface. It suffices that the distal end portion of the side wall portion 7 in the protruding direction of the engaging wall 15 is not positioned below the lower surface of the support portion 43 of the bottom wall constituting portion 2. However, the engagement wall 15 of the short side wall portion 7 in the laying position is a bottom wall configuration in order to prevent a situation in which another member comes into contact with the engagement wall 15 protruding downward from the housing portion 51. It is desirable that the portion 2 be positioned flush with the lower surface of the outer periphery corresponding portion 42, which is the lower surface of the portion where the accommodating portion 51 is provided, or slightly above the lower surface.

  (C) In the said embodiment, when the short side base part 5 protrudes upwards rather than the long side base part 4, and the folding container 1 is made into an assembly state from a folded state, a pair of short side wall part 7 Is configured so that the long side wall portion 6 is set to the upright position, but the long side base portion protrudes above the short side base portion, and the folding container is When the assembled state is set, the pair of long side wall portions may be raised first, and then the short side wall portion may be raised. When this configuration is adopted, an engagement wall and an elastic locking piece are provided on the long side wall portion, and an accommodating portion is provided corresponding to the short side base portion.

  Further, in the above embodiment, the pair of long side wall portions 6 set in the laying position are both in contact with the upper surface of the bottom wall portion 3 and have the same height position. The other long side wall 6 is placed on the upper side of one long side wall 6 that has been placed in the laying position among the side walls 6, and the long side walls 6 overlap each other vertically. You may comprise as follows.

  In addition, in the said embodiment, about the number, arrangement | positioning, lateral width, etc. of the long side hinge part 34 (long side side bearing part 8) and the short side side hinge part 14 (short side side bearing part 9), etc. It is not particularly limited and can be changed as appropriate. However, it is desirable that the long side bearing portion 8 be provided at least near one side of the accommodating portion 51 in order to increase the strength of the peripheral portion of the accommodating portion 51 provided on the long side base portion 4. Further, for example, as shown in FIG. 17, the long side bearing portion 8 may be provided in the vicinity of both sides of the accommodating portion 51 in the extending direction of the long side base portion 4.

  (D) Although the folding container 1 in the said embodiment is comprised by the polypropylene, it is good also as comprising by other resin materials, such as polyethylene, PET, and polyamide.

  DESCRIPTION OF SYMBOLS 1 ... Folding container, 2 ... Bottom wall structure part, 3 ... Bottom wall part, 4 ... Long side side base part, 5 ... Short side side base part, 5A ... Base recessed part, 5B ... Back surface, 6 ... Short side side Side wall portion, 8 ... long side bearing portion, 9 ... short side bearing portion, 15 ... engagement wall, 16 ... engagement hole portion, 17 ... elastic locking piece, 37 ... engagement projection, 37A ... main projection, 51: accommodating part, 53 ... stopper part, 55 ... opening, 59 ... mold.

Claims (3)

A bottom wall part having a substantially rectangular shape in plan view, and a bottom wall constituting part comprising a base part provided along each side part of the bottom wall part;
Connected to each base portion of the bottom wall constituting portion so as to be rotatable and displaceable between a standing position standing above each base portion and a laying position lying above the bottom wall portion. A side wall portion,
In a folding container that can change state between an assembled state in which all the side wall portions are in the standing position and a folded state in which all the side wall portions are in the laying position,
The base portion includes a pair of opposing first base portions projecting upward from a pair of opposite side portions of the bottom wall portion, and a pair of opposing portions configured to be lower in height than the first base portion. With a second base of
The side wall portion includes a pair of first side wall portions respectively connected to the first base portions, and a pair of second side wall portions respectively connected to the second base portions.
In the configuration in which the second side wall portion can be set to the upright position by setting the pair of first side wall portions to the upright position when the assembled state is set from the folded state,
Support protrusions protruding from the inner surface of the first side wall are provided on both sides of the first side wall,
In the assembled state, the outer surface side of the second side wall is in contact with or close to the support protrusion of the first side wall,
In the bottom wall constituting portion, in correspondence with the second base portion, when the first side wall portion is in the laying position, a storage portion into which the support protrusion of the first side wall portion can be inserted, A folding container, wherein the folding container is provided so as to vertically penetrate the bottom wall constituting portion. The support protrusion is provided with an engagement hole that penetrates in the width direction of the first side wall,
On the outer surface side of the second side wall portion, an engagement protrusion to be inserted into the engagement hole portion of the support protrusion in the assembled state is provided,
The thickness of the peripheral part of the said engagement hole part at least among the said support protrusions is comprised more largely than the thickness of the plate-shaped body which comprises the said 1st side wall part. Folding container. Each base portion includes a plurality of bearing portions that respectively support a plurality of shaft portions provided on the respective side wall portions,
The folding container according to claim 1 or 2, wherein in the second base portion, the bearing portion is provided at least near one side of the housing portion.

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