JP7055362B2 - Folding container - Google Patents

Description

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

Conventionally, a bottom wall portion having a substantially rectangular shape in a plan view, a bottom wall component portion provided with a base portion protruding upward along each side side portion of the bottom wall portion, and a bottom wall component portion for each base portion have been used. It is provided with a side wall portion that is rotatably and displaceably connected between an upright 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 upright position. Folding containers that can be changed into a assembled state and a folded state in which all the side wall portions are laid down are known.

Further, the side wall portion of the folding container includes a pair of facing first side wall portions and a pair of facing second side wall portions, and when the folding container is changed from the folded state to the assembled state, the pair of first side walls is provided. The structure is such that the second side wall portion cannot be set to the upright position unless the portion is set to the upright position first. Further, both side portions of the first side wall portion project from the inner surface of the first side wall portion to abut on the outer surface of the second side wall portion in the assembled state of the folding container to prevent the second side wall portion from being displaced outward. A support protrusion is provided. In addition, in the assembled state of the folding container, in order to prevent the second side wall portion from being displaced inward, the folding container is configured to be elastically deformable in the thickness direction of the first side wall portion with respect to the first side wall portion. There is a technique of providing an elastic locking piece that abuts on the inner surface of the second side wall portion in the assembled state of the above (see, for example, Patent Document 1 and the like).

Japanese Patent Application Laid-Open No. 2003-335329

By the way, the force for operating the elastic locking piece (the force for pressing the elastic locking piece when releasing the locked state that regulates the inward displacement of the second side wall portion) differs depending on the operator. Therefore, for example, if the elastic locking piece is operated with an excessively strong force, there is a concern that the elastic locking piece may be damaged or plastically deformed. On the other hand, it is conceivable to increase the strength of the elastic locking piece by increasing the number of reinforcing ribs provided on the back surface side of the elastic locking piece or increasing the thickness of the reinforcing rib. There is a concern that it will be difficult to operate the piece.

The present invention has been made to solve the above-exemplified problems and the like, and an object of the present invention is to improve the durability of the elastic locking piece while avoiding deterioration of the operability of the elastic locking piece. It is to provide a folding container that can be used.

Hereinafter, each means suitable for solving the above-mentioned purpose and the like will be described separately for each item. In addition, the action and effect peculiar to the corresponding means will be added as necessary.

Means 1. A bottom wall portion having a substantially rectangular shape in a plan view, and a bottom wall component portion provided with a base portion provided along each side portion of the bottom wall portion.
With respect to each base portion of the bottom wall component portion, the standing position erected above each base portion and the laying position laid above the bottom wall portion are rotatably and displaceably connected to each other. With a side wall,
In a folding container whose state can be changed between an assembled state in which all the side wall portions are in the upright position and a folded state in which all the side wall portions are in the laying position.
The base portion is a pair of facing first base portions protruding upward from the pair of opposite side sides of the bottom wall portion, and a pair of facing base portions having a height lower than that of the first base portion. Equipped with the second base part of
The side wall portion includes a pair of first side wall portions connected to each of the first base portions, and a pair of second side wall portions connected to each of the second base portions.
In a configuration in which the pair of first side wall portions can be set to the upright position and the second side wall portion can be set to the upright position when the folded state is changed to the assembled state.
The first side wall portion is
It is configured to be elastically deformable in the thickness direction of the first side wall portion, and is in contact with or close to the inner surface of the second side wall portion in the upright position in the assembled state, of the second side wall portion. An elastic locking piece that regulates the inward displacement of the folding container,
A stopper portion that is arranged outside the folding container of the elastic locking piece and comes into contact with the elastic locking piece that has been deformed by a certain amount toward the outside of the folding container to regulate further deformation. I have
Support protrusions protruding from the inner surface of the first side wall are provided on both sides of the first side wall.
An opening is provided to open a space between the elastic locking piece and the stopper portion to the side of the first side wall portion, and the support is provided on the tip end side of the elastic locking piece. A folding container characterized by the location of the ridge.

According to the means 1, since the amount of deformation of the elastic locking piece is limited by the stopper portion, the elastic locking piece is deformed too much while the strength is set so that the elastic locking piece is relatively easily deformed. As a result, it is possible to prevent the elastic locking piece from being damaged or plastically deformed. Therefore, it is possible to improve the durability of the elastic locking piece while avoiding a decrease in the operability of the elastic locking piece. As a result, the elastic locking piece can be operated relatively smoothly regardless of the strength of the force of the operator who operates the elastic locking piece, and the workability when folding the folding container is improved. be able to.
Further, a portion where the elastic locking piece and the stopper portion face each other (at least the outer surface of the elastic locking piece) by the mold for forming the outer surface side of the support protrusion or the hole penetrating the support protrusion. A part and the inner surface of the stopper portion) can be suitably molded (in the mold for molding the outer surface side of the support protrusion portion, etc., the portion where the elastic locking piece and the stopper portion face each other is formed. It is possible to provide a part to be used). Therefore, it is possible to reliably form the first side wall portion provided with the stopper portion with a relatively simple mold structure.

Means 2. The folding container according to means 1, wherein the stopper portion is provided so as to be in contact with the outer surface of the elastic locking piece on the tip end side.

According to the means 2, the deformation of the elastic locking piece can be effectively prevented. That is, the deformation of the root side of the elastic locking piece can be regulated, but the deformation of the tip side is regulated, as in the case where the stopper portion is configured to be in contact with the root side of the outer surface of the elastic locking piece. It is possible to avoid situations such as being unable to do so. Further, in the pressing operation of the elastic locking piece, it is conceivable that the tip end side of the inner surface of the elastic locking piece is pressed. Therefore, by supporting the portion on the back surface side with the stopper portion, the elastic locking piece can be pressed. Deformation can be regulated more effectively.

It should be noted that "the support protrusion is provided with an engaging hole that penetrates in the lateral width direction of the first side wall, and the outer surface side of the second side wall is the support protrusion in the assembled state. It may be said that an engaging protrusion to be inserted into the engaging hole is provided. "

Means 3 . The folding container according to means 1 or 2 , wherein at least a part of the tip end portion of the elastic locking piece and the stopper portion are arranged so as to overlap each other in the thickness direction of the first side wall portion. ..

According to the means 3 , it is possible to prevent a situation in which another member comes into contact with the tip of the elastic locking piece from the outer surface side of the first side wall portion. Therefore, it is possible to protect the elastic locking piece. Further, when the folded container in the assembled state is put into the folded state, the elastic locking is performed in order to release the locked state of the elastic locking piece that regulates the inward displacement of the folding container of the second side wall portion. When the piece is pressed to the outside of the folding container, for example, when the elastic locking piece is pressed with the thumb, the side of the stopper portion opposite to the support surface that can be supported by contacting the elastic locking piece. The index finger or the like can be hung on the back surface (outer surface) of the. This facilitates the pressing operation of the elastic locking piece, and can improve the folding workability of the folding container.

It is a perspective view which looked at the folding container in an assembled state from the top side. It is a perspective view which looked at the folding container in an assembled state from the bottom side. It is a perspective view which looked at the folding container in a folded state from the top side. It is a 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 in the state which one short side side side wall part is in a laying position, and the other short side side side wall part is in an upright position. It is a top view which shows the folding container in the state which one short side side wall part is in a laying position, and the other short side side side wall part is in an upright position. It is a side view which shows the folding container in the state which one short side side side wall part is in a laying position, and the other short side side side wall part is in an upright position. It is a perspective view which shows the outer surface side of the side wall part on the short side side. It is a perspective view which shows the outer surface side of the side wall part on the long side. It is a partial enlarged side view which looked at the side wall part on the short side side from the outer surface side. It is a partially enlarged sectional view in the case where the connecting portion between the side wall portion on the long side side and the side wall portion on the short side side is cut at the position of line AA in FIG. It is a partial enlarged perspective view including a partial cross section of a folding container in an assembled state. It is sectional drawing of the folding container in a folded state. It is a side view which shows the state which the folding container in a folded state is stacked. It is a side view which shows the state which put the folding container in a folded state on the folding container in an assembled state. It is a partially enlarged sectional view which shows the mold which forms the side wall part on the short side side. FIG. 3 is a partially enlarged plan view showing a folding container in a folded state in another embodiment.

Hereinafter, one embodiment will be described with reference to the drawings. As shown in FIGS. 1 and 2, the folding container 1 has a bottom wall portion 3 having a substantially rectangular shape in a plan view and a bottom wall portion 3 protruding upward from the bottom wall portion 3 along each long side portion of the bottom wall portion 3. It is provided with a bottom wall component portion 2 including a long side base portion 4 to be formed 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. .. Further, the folding container 1 is rotatably connected to the long side side wall portion 6 which is rotatably connected to each long side base portion 4 and to each short side base portion 5. It is provided with a side wall portion 7 on the short side. The bottom wall constituent portion 2, the long side side wall portion 6, and the short side side side wall portion 7 of the present embodiment are made of polypropylene. In the present embodiment, the short side base portion 5 corresponds to the first base portion, the long side base portion 4 corresponds to the second base portion, and the short side side wall portion 7 corresponds to the first side wall portion. However, the long side base portion 4 corresponds to the second side wall portion.

Further, as shown in FIGS. 1, 3 and the like, the long side side wall portion 6 and the short side side side wall portion 7 stand above the long side side base portion 4 and the short side side base portion 5, respectively. It is configured to be rotatable and displaceable between the standing position to be provided and the laying position laid on the central portion side of the bottom wall portion 3. Further, the protrusion length of the long side base portion 4 from the bottom wall portion 3 is lower than the protrusion length of the short side base portion 5 from the bottom wall portion 3, and the long side side wall portion 6 is rotated. The formation position of the long side bearing portion 8 for rotatably supporting is also located below the forming position of the short side bearing portion 9 for rotatably supporting the short side side wall portion 7. Further, the lateral width of the short side side wall portion 7 is configured to be substantially the same as the length of the short side width of the bottom wall constituent portion 2, and the lateral width of the long side side wall portion 6 is between the pair of short side base portions 5. It is configured to be almost the same as the distance.

Therefore, in the present embodiment, the folding container 1 in the assembled state (see FIG. 1) in which all the long side side wall portions 6 and the short side side side wall portions 7 are in the upright position is placed on all the long side sides. When the side wall portion 6 and the short side side wall portion 7 are in the folded state (see FIG. 3) in which the side wall portion 7 is laid down, the pair of long side side side wall portions 6 are first placed as shown in FIG. After being displaced to the laying position, the short side side wall portion 7 is displaced to the laying position. Then, as shown in FIG. 3, when the folding container 1 is in the folded state, the long side side wall portion 6 which is the laid position overlaps above the bottom wall portion 3 and is short which is the laid position. The side side wall portion 7 overlaps above the long side side wall portion 6.

The distance between the pair of long-side base portions 4 is longer than twice the vertical width of the long-side side side wall portion 6 (the long-side side base plate 31 described later). Therefore, the heights of the laying positions of the pair of long side side wall portions 6 are aligned. Further, the distance between the pair of short side base portions 5 is slightly longer than twice the vertical width of the short side side wall portion 7 (short side side base plate 11 described later). Therefore, the heights of the laying positions of the pair of short side side wall portions 7 are aligned.

Further, as shown in FIG. 3 and the like, in the present embodiment, both ends of the short side base portion 5 project upward from the long side base portion 4 and are connected to the upper surface side of the long side base portion 4. An auxiliary convex portion 10 is provided. The auxiliary convex portion 10 improves the strength of both ends of the short side base portion 5. In addition, as shown in FIG. 13 and the like, the pair of long side side wall portions 6 that are laid down are both abutted against and supported by the upper surface of the bottom wall portion 3, and the pair of short sides that are laid down are supported. The side side wall portions 7 are configured to be in contact with (or close to) a pair of long side side wall portions 6 which are each laid down and supported at the same height position as each other. Further, as shown in FIG. 3 and the like, the short side base portion 5 and the upper side portion (upper surface) of the auxiliary convex portion 10 are located above the short side side side wall portion 7 in the laid position.

As shown in FIGS. 1, 8 and the like, each short side side wall portion 7 has a short side side base plate 11 having a substantially rectangular shape in front view and a short side side along the upper side portion of the short side side base plate 11. The short side upper frame portion 12 protruding outward from the base plate 11, the short side lower side rib 13 protruding outward from the lower side portion of the short side base portion, and the short side lower side rib 13 downward from the lower surface. It is provided with a short-side hinge portion 14 that protrudes into the short-side and is pivotally supported by the short-side side bearing portion 9. The short side upper frame portion 12 has a short side at a position separated by a predetermined distance from the short side upper side rib 12a protruding outward from the upper side portion of the short side base plate 11 and the short side upper side rib 12a. The short side upper frame connecting between 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. It is equipped with a reinforcing rib 12c. In this embodiment, the short side base plate 11 corresponds to a plate-shaped body constituting the first side wall portion.

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

Further, as shown in FIGS. 1, 10 to 12, etc., the short side base plate 11 has a short side base at a position close to each engaging wall 15 and the short side upper frame portion 12. By forming a substantially U-shaped slit in the plate 11, the elastic piece 18 formed by the portion surrounded by the slit and the locking projection 19 protruding inward from the tip of the elastic piece 18 An elastic locking piece 17 is provided. Each elastic piece 18 is configured such that the central portion side in the lateral width direction of the side wall portion 7 on the short side side is connected to the base plate 11 on the short side side so that the elastic piece 18 can be elastically deformed in the thickness direction of the side wall portion 7 on the short side side. 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 projects 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 side wall portion 7 on the short side side in the lateral width direction is the side wall surface on the short side side. It extends inwardly toward the side side of the portion 7, and the surface of the locking projection 19 on the side side of the short side side wall portion 7 is orthogonal to the short side base plate 11. It extends in the direction. Further, as shown in FIG. 8 and the like, on the outer surface side of the elastic locking piece 17, a locking reinforcing rib 20 extending along the upper side portion and the lower side portion of the elastic locking piece 17 is provided. In addition, as shown in FIG. 11 and the like, the back surface side (outer surface side) of the locking projection 19 has a lightening shape, and the locking reinforcing rib 20 is also connected to the back surface side of the locking projection 19. Has been done. The protruding length of the elastic piece 18 and the locking projection 19 of the locking reinforcing rib 20 of the present embodiment is the intermediate position in the protruding direction from the connecting portion of the elastic locking piece 17 with the short side base plate 11. The portion including the elastic locking piece 17 is shorter than the portion on the root side of the elastic locking piece 17, and the portion on the tip end side of the elastic locking piece 17 is longer than the portion on the root 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 projecting 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 side wall portion 7. It is provided with a pair of shaft protrusions 22 protruding laterally from the lower end portion. On the outer surface side of the short side side wall portion 7, the short side side upper frame portion 12 and the short side side lower side rib 13 on the lateral width direction center portion side of the short side side side wall portion 7 of each elastic locking piece 17. A vertical rib 23 on the short side is provided to connect the two. Further, the short side base plate 11 bulges outward in a range surrounded by the short side upper frame portion 12, the short side lower side rib 13, and the pair of left and right short side vertical ribs 23. A protrusion 24 is provided. The outer peripheral portion of the bulging portion 24 is inclined and extends, and 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 side rib. They are appropriately connected by ribs. In the present embodiment, the short side side wall portion 7 is formed by the outer edge of the short side side upper frame portion 12, the short side side lower side rib 13, and the short side side vertical rib 23, and the outer surface of the bulging portion 24. The outer surface is composed. Further, the inner surface of the short side side wall portion 7 is formed by the inner surface of the portion of the short side side base plate 11 other than the bulging portion 24 (see FIG. 5 and the like). The thickness of the short side side wall portion 7 is between the outer surface and the inner surface of the short side side wall portion 7.

As shown in FIGS. 1, 9 and the like, each long side side wall portion 6 has a long side side base plate 31 having a substantially rectangular shape in front view and a long side side along the upper side portion of the long side side base plate 31. The long side upper frame portion 32 protruding outward from the base plate 31, the long side lower side rib 33 protruding outward from the lower side portion of the long side base plate 31, and the long side lower side rib 33. It is provided with a long side hinge portion 34 that projects downward from the lower surface and is pivotally supported by the long side bearing portion 8. The long side upper frame portion 32 also has two upper and lower rows of ribs and ribs connecting the upper and lower ribs, similarly to the short side upper frame portion 12. Further, the long side base plate 31 has a bulging portion that bulges outward in a range including the central portion thereof, similarly to the short side base plate 11. 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 surface side of the hinge main body 35. Further, in the present embodiment, the long side hinge portion 34 (particularly, the shaft protrusion portion 36) constitutes the shaft portion.

Further, on the upper portions of both side portions of the long side side wall portion 6, engaging projections 37 protruding from the outer surface of the long side side base plate 31 are provided. Then, as shown in FIG. 5, the short side side wall portion 7 is displaced to the upright position, and then the long side side wall portion 6 is displaced to the upright position as shown in FIG. 1. As shown above, the engaging protrusion 37 is inserted into the engaging hole portion 16 provided in the engaging wall 15 of the short side side wall portion 7, and as shown in FIGS. 1, 11 and the like, the engaging protrusion 37 is inserted. The outer surface of the side wall portion 6 on the long side of the periphery of the above is in contact with or in close contact with the engaging wall 15. With this configuration, tilt displacement of the long side side wall portion 6 in the upright position to the outside is prevented, and the positional deviation between the long side side wall portion 6 and the short side side wall portion 7 in the vertical direction is prevented. It is designed to be prevented.

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

As shown in FIG. 5, in the present embodiment, only the engaging wall 15 projects inward from the inner surface of the short side base plate 11 on both sides of the short side side wall portion 7, but is short. On both sides of the inner surface of the side base plate 11, base convex portions 38 slightly projecting inward from the entire vertical width direction are provided, and the engaging wall 15 projects from the base convex portions 38. In the lateral width direction of the short side side wall portion 7, the lateral width of the base convex portion 38 is wider than the lateral width of the engaging wall 15, and in the present embodiment, it is the same length as the thickness of the long side side base portion 4.

On the other hand, as shown in FIG. 9, the engaging projection 37 of the long side side wall portion 6 projects slightly laterally from the side side portion of the long side base plate 31. The engagement protrusion 37 of the present embodiment is located below the main engagement protrusion 37 and the engagement protrusion 37, and has a side surface side surface and a lower surface of the long side side wall portion 6. However, there is a sub engaging protrusion 37 connected to the rib provided on the outer surface side of the long side side wall portion 6, but the sub engaging protrusion 37 projects laterally from the side side portion of the long side base plate 31. Is configured with respect to the main engaging protrusion 37.

On the other hand, as shown in FIG. 5, the portion corresponding to the engaging hole portion 16 protruding laterally from the side side portion of the long side side base plate 31 in the short side side wall portion 7 is engaged. The base convex portion 38 is omitted so that the joint protrusion 37 is inserted into the engaging hole portion 16. As a result, the strength of both side portions of the short side side wall portion 7 is improved, and the width of the engaging projection 37 is increased as much as possible without increasing the protruding length of the engaging wall 15, and the engaging hole portion 16 is formed. It is possible to suppress a decrease in the strength of the peripheral portion of the. On the inner surface side of the short side base portion 5, an engaging protrusion 37 protruding slightly laterally from the side side portion of the long side base plate 31 is inserted between the pair of short side base portions 5. A recess is provided for this.

As shown in FIGS. 1, 4, and 13, the bottom wall portion 3 of the bottom wall component portion 2 has a substantially rectangular plate-shaped bottom plate portion 41 and a folding container 1 in an assembled state among the bottom plate portions 41. When stacked (stacked) vertically, the outer peripheral corresponding portion 42 (the upper surface side of the bottom wall portion 3), which is a portion supported by abutting against the upper side portions of the side wall portions 6 and 7 of the lower folding container 1. A support portion 43 having a substantially grid pattern on the lower surface is provided so as to project downward from a portion on the inner peripheral side of the portion where the base portion 4 on the long side side and the base portion 5 on the short side side are provided. With this configuration, when the folded containers 1 in the assembled state are stacked, the support portion 43 of the upper folding container 1 is inserted into the inner peripheral side of the side wall portions 6 and 7 of the lower folding container 1. The outer peripheral corresponding portion 42 of the upper folding container 1 abuts on and is supported by 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 peripheral corresponding portion 42 is located above the portion on the inner peripheral side thereof. Further, in the present embodiment, the mold for forming the inner space of the long side base portion 4 and the short side base portion 5 is die-cut downward via the outer peripheral corresponding portion 42, so that the outer peripheral can be supported. 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 the folded state are stacked, the support portion 43 of the upper folding container 1 is the pair of short side base portions 5 of the lower folding container 1. It is inserted into the space (see FIG. 3) between the auxiliary protrusions 10 provided in between and corresponding to both ends of the base portions 5 on the short side, and the outer peripheral corresponding portion of the upper folding container 1. 42 is supported by abutting against the upper side portion of the short side base portion 5 of the lower folding container 1. In particular, in the present embodiment, in a state where the folding containers 1 in the folded state are stacked, the lower surface of the support portion 43 of the upper folding container 1 and the short side side where the lower folding container 1 is laid down. It is configured so that the outer surface of the side wall portion 7 facing upward is close to (or abutted against).

As shown in FIGS. 5 and 6, the long side bearing portion 8 is opened upward and toward the inner peripheral side of the bottom wall portion 3, and the hinge body 35 of the long side hinge portion 34 can be inserted into the insertion. The portion 44 and the shaft protrusion 36 of the long side hinge portion 34 are configured to be insertable, the displacement of the bottom wall portion 3 of the shaft protrusion 36 to the inner peripheral side is restricted, and the shaft protrusion 36 rotates. It is provided with a shaft support 45 that allows displacement. Further, the shaft support portion 45 is provided with a retaining protrusion 46 for preventing the shaft protrusion 36 inserted into the shaft support portion 45 from coming off from the shaft support portion 45. In the present embodiment, four long-side bearing portions 8 are provided in each long-side side base portion 4.

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

By the way, as shown in FIGS. 4, 5 and the like, when the short side side wall portion 7 is laid down in the bottom wall constituent portion 2 corresponding to the long side side base portion 4, the short side side wall surface portion 7 is laid down. An accommodating portion 51 into which the engaging wall 15 of the portion 7 can be inserted is provided. The accommodating portion 51 of the present embodiment is provided so as to open on the outer peripheral side of the bottom wall constituent portion 2 and to penetrate the bottom wall constituent portion 2 vertically. The thickness of the engaging wall 15 is smaller than the thickness of the long side base portion 4, and when the engaging wall 15 is housed in the accommodating portion 51, the outer surface of the engaging wall 15 and the long side base portion The outer surface of 4 is made to be substantially flush with each other.

Further, as shown in FIG. 5, of the upper surface of the long side base portion 4, the portion on which the short side side wall portion 7 (base convex portion 38), which is the laid position, is placed is more than the other portions. Is also a step 52 located slightly below. In the present embodiment, the short side side wall portion 7 is set to the laying position, so that the inner surface side (base convex portion 38) of the short side side side wall portion 7 is the upper surface (step portion 52) of the long side side base portion 4. The tip of the engaging wall 15 inserted into the accommodating portion 51 in the protruding direction (the side portion facing downward when the short side side wall portion 7 is in the laying position) is supported by the contact with the housing portion 51. , Is flush with the lower surface of the bottom plate portion 41 (outer peripheral corresponding portion 42) of the bottom wall portion 3, or is located slightly above the lower surface (see FIGS. 4 and 14). Therefore, 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 side wall portion 7 which is the laying position of the upper folded container 1 Although the abutment wall 15 and the upper side 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 the lower folding container 1. A situation in which the side wall portion 7 on the short side of the upper folding container 1 is pressed upward by the side wall portions 6 and 7 and is displaced upward relative to the bottom wall constituent portion 2 and the like of the upper folding container 1. Is designed to be avoided.

In addition, as shown in FIG. 13, in the present embodiment, the outer surface (the surface facing upward) and the inner surface (the surface facing downward) of the short side side wall portion 7 which is the laid position are , Extends almost horizontally. Further, the outer surface and the inner surface of the long side side wall portion 6 which is the laid position also extend in a substantially horizontal direction, and the inner surface of the short side side wall portion 7 which is the laid position is the length which is the laid position. It is designed to be close to the outer surface of the side wall portion 6. It is also possible to configure the inner surface of the short side side wall portion 7 in the laid position to abut on the outer surface of the long side side wall portion 6 in the laid position. However, even if the tip of the engaging wall 15 of the short side side wall portion 7 which is laid down is located 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 large. , It is set to be less than the wall thickness of the wall portion constituting each portion (accommodation portion 51, etc.) of the bottom wall constituent portion 2.

Further, as shown in FIG. 5 and the like, in the engaging wall 15, the thickness of the peripheral edge portion of the engaging hole portion 16 is configured to be thicker than the thickness of other portions. Further, as shown in FIG. 11, in the present embodiment, the thickness (W1) of the peripheral edge portion of the engaging hole portion 16 in the engaging wall 15 is the short side side base plate 11 constituting the short side side wall portion 7. It is configured to be larger than the thickness (W2) of. In addition, as shown in FIGS. 5 and 6, in the long side base portion 4, between each accommodating portion 51 and both ends of the long side base portion 4 (short side base portion 5), The long side bearing portion 8 is provided. In the present embodiment, the long side bearing portion 8 and the accommodating portion 51 are arranged 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 short and shorter than the width of the long side bearing portion 8.

Further, as shown in FIGS. 8 and 10 to 12, the short side side wall portion 7 of the present embodiment is arranged outside the folding container 1 of the elastic locking piece 17 and is located outside the folding container 1. It is provided with a stopper portion 53 that comes into contact with the elastic locking piece 17 that has been deformed by a certain amount and restricts further deformation. More specifically, the short side side wall portion 7 has the outer edge of the short side side upper frame portion 12 and the short side side lower side rib 13 on both side portions on the outer surface side of the short side side wall portion 7. A corner wall portion 54 connecting between the outer edge and the corner wall portion 54 is provided, and the stopper portion 53 is a side wall portion 7 on the short side from a portion of the corner wall portion 54 corresponding to the elastic locking piece 17 in the vertical direction. It protrudes toward the center in the width direction of. As shown in FIG. 11, the stopper portion 53 is configured to be thicker than the corner wall portion 54, and is shaped to protrude inward (on the elastic locking piece 17 side) of the folding container 1 from the corner wall portion 54. ing.

When the folded container 1 in the assembled state is brought into the folded state, 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 projection 19 does not come into contact with the long side side wall portion 6, thereby restricting the inward tilt displacement of the long side side wall portion 6 by the elastic locking piece 17. The locked state is released, and the side wall portion 6 on the long side can be displaced to the laying position side. Further, when the elastic locking piece 17 is elastically deformed outward, if the elastic piece 18 is deformed by a certain amount, the stopper portion 53 comes into contact with the outer surface of the elastic locking piece 17 on the tip end side. It has become like. Of course, in the state where 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 to the extent that the elastic limit is not exceeded. It is designed to fit.

In addition, as shown in FIGS. 10, 11 and the like, 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 side wall portion 7 on the short side, 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 arranged so as to overlap each other. As a result, the outer surface of the elastically deformed elastic locking piece 17 on the tip end side is configured so that the stopper portion 53 can come into contact with each other. Further, 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 formed. , Of the outer surface of the elastic piece 18, so as to abut on the portion between the pair of upper and lower locking reinforcing ribs 20 provided on the outer surface side of the elastic locking piece 17 (do not abut on the locking reinforcing rib 20). It has become.

Further, as shown in FIGS. 8, 11, 12, 12 and the like, in the short side side wall portion 7, the space between the elastic locking piece 17 and the stopper portion 53 is provided lateral to the short side side wall portion 7. The opening 55 is provided. In the present embodiment, the corner reinforcing rib 56 for connecting the corner wall portion 54 and the short side base plate 11 is provided at a position substantially the same as the upper side portion and the lower side portion of the elastic locking piece 17. The opening 55 is partitioned by the pair of upper and lower corner reinforcing ribs 56, the corner wall portion 54, and the short side base plate 11, and the space between the elastic locking piece 17 and the stopper portion 53. It is designed to communicate with. Further, the opening 55 extends (horizontally) along the lateral width direction of the short side side wall portion 7, like the engaging hole portion 16 provided in the engaging wall 15.

In addition, as shown in FIG. 16, the portion where the elastic locking piece 17 and the stopper portion 53 face each other (the outer surface on the tip end side of the elastic locking piece 17 and the inner surface of the stopper portion 53) is In the mold device 58 for molding the short side side wall portion 7, the mold device 58 is molded by a mold 59 for molding the outer surface side of the engaging wall 15, the engaging hole portion 16 penetrating the engaging wall 15, and the like.

As described in detail above, according to the present embodiment, the short side side wall portion 7 is outside the folding container 1 of the elastic locking piece 17 configured to be elastically deformable in the thickness direction of the short side side wall portion 7. It is provided with a stopper portion 53 which is arranged on the side and comes into contact with the elastic locking piece 17 which has been deformed by a certain amount toward the outside of the folding container 1 and regulates further deformation. Since the amount of deformation of the elastic locking piece 17 is limited by the stopper portion 53, it is caused by excessively deforming the elastic locking piece 17 while making the elastic locking piece 17 relatively elastically deformable. Therefore, it is possible to prevent the elastic locking piece 17 from being damaged or plastically deformed. Therefore, it is possible to improve the durability of the elastic locking piece 17 while avoiding a decrease in the operability of the elastic locking piece 17. As a result, the elastic locking piece 17 can be operated relatively smoothly regardless of the strength of the force of the operator who operates the elastic locking piece 17, and the workability when folding the folding container 1 is improved. Etc. can be planned.

Further, the stopper portion 53 is provided so as to be able to come into contact with the outer surface of the elastic locking piece 17 on the tip end side. Therefore, the deformation of the elastic locking piece 17 can be effectively prevented. That is, as in the case where the stopper portion 53 is configured to be able to come into contact with the root portion side of the outer surface of the elastic locking piece 17, the deformation of the root portion side of the elastic locking piece 17 can be regulated, but the tip portion side. It is possible to avoid the situation where the deformation cannot be regulated. Further, since it is conceivable that the tip end side of the inner surface of the elastic locking piece 17 is pressed in the pressing operation of the elastic locking piece 17, the elastic locking piece 17 is supported by the stopper portion 53 to support the portion on the back surface side thereof. The deformation of the piece 17 can be regulated more effectively.

Further, the short side side wall portion 7 is provided with an opening 55 that opens a space between the elastic locking piece 17 and the stopper portion 53 to the side of the short side side wall portion 7. Therefore, a portion where the elastic locking piece 17 and the stopper portion 53 face each other by the outer surface side of the engagement wall 15 or the mold 59 for forming the engagement hole portion 16 or the like penetrating the engagement wall 15. (A part of the outer surface of the elastic locking piece 17 and the inner surface of the stopper portion 53) can be suitably molded (in the mold 59 for molding the outer surface side of the engaging wall 15, the elastic locking piece 17 is formed. A portion for forming a portion facing the stopper portion 53 can be provided). Therefore, it is possible to reliably form the short side side wall portion 7 provided with the stopper portion 53 with a relatively simple mold structure.

In addition, in the present embodiment, at least a part of the tip portion of the elastic locking piece 17 and the stopper portion 53 are arranged so as to overlap each other in the thickness direction of the short side side wall portion 7. Therefore, it is possible to prevent a situation in which another member comes into contact with the tip end portion of the elastic locking piece 17 from the outer surface side of the short side side wall portion 7. Therefore, the elastic locking piece 17 can be protected. Further, when the folded container 1 in the assembled state is put into the folded state, the locked state of the elastic locking piece 17 that regulates the inward displacement of the folding container 1 on the long side side wall portion 6 is to be released. When the elastic locking piece 17 is pressed outward from the folding container 1, for example, when the elastic locking piece 17 is pressed with the thumb, the elastic locking piece 17 comes into contact with the elastic locking piece 17 of the stopper portion 53. The index finger or the like can be hung on the back surface (outer surface) opposite to the support surface that can be supported. As a result, the elastic locking piece 17 can be easily pressed, and the folding workability of the folding container 1 can be improved.

The content is not limited to the description of the above embodiment, and may be implemented as follows, for example. Of course, other application examples and modification examples not illustrated below are also possible.

(A) In the above embodiment, it is also possible to omit the engagement hole portion 16 provided in the engagement wall 15 and the engagement protrusion 37 inserted into the engagement hole portion 16. However, in order to stabilize the assembled state of the folding container 1, it is desirable to provide the engaging hole portion 16 and the engaging protrusion 37. In addition, the engaging hole portion 16 into which the engaging protrusion 37 is inserted and engaged may not penetrate the engaging wall 15, but by allowing the engaging protrusion 37 to be inserted and engaged, the portion where the engaging protrusion 37 is inserted and engaged. Can be formed by the mold 59 that forms the outer surface of the engaging wall 15, and the complexity of the mold structure can be suppressed.

The arrangement of the elastic locking pieces 17 in the vertical direction is not particularly limited, but it is desirable to provide the elastic locking pieces 17 on the upper side as much as possible in consideration of stabilization of the locked state and operability when releasing the locked state. In addition, although the locking projection 19 of the elastic locking piece 17 has a lightening shape, it may be configured not to provide such a recess. Further, the arrangement of the engaging wall 15 in the vertical direction is not particularly limited, but it is desirable to provide the folding container 1 on the upper side as much as possible in order to stabilize the assembled state of the folding container 1. In addition, in the above embodiment, the engagement wall 15 is configured so that the thickness is partially different, but all of them may be configured to have the same thickness.

Further, in the above embodiment, the stopper portion 53 is configured so as to be in contact with the tip end portion side of the elastic locking piece 17, but instead of or in addition to such a configuration, for example, the elastic locking piece 17 It may be configured so that it can come into contact with the root portion side (or the intermediate portion in the protruding direction). Further, in the above embodiment, the elastic piece 18 of the elastic locking piece 17 is configured such that the end portion of the side wall portion 7 on the short side side on the central portion side in the lateral width direction is connected to the base plate 11 on the short side side. , 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 above embodiment, a recess may be provided on the inner surface side of the long side side wall portion 6 so as to accommodate the locking projection 19 of the elastic locking piece 17.

(B) In the above embodiment, the tip of the engaging wall 15 of the short side side wall portion 7 which is laid down is facing downward (when the short side side wall portion 7 is in the laid down position, it faces downward). The side portion) is configured to be flush with the lower surface of the bottom plate portion 41 (outer peripheral corresponding portion 42) of the bottom wall portion 3 or slightly above the lower surface, but is a short laid position. It suffices that the tip portion of the engagement wall 15 of the side side wall portion 7 in the protruding direction is not positioned below the lower surface of the support portion 43 of the bottom wall component portion 2. However, in order to prevent another member from coming into contact with the engaging wall 15 protruding downward from the accommodating portion 51, the engaging wall 15 of the short side side wall portion 7 which is laid down has a bottom wall configuration. It is desirable that the portion 2 is located flush with the lower surface of the outer peripheral 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 above embodiment, when the short side base portion 5 protrudes above the long side base portion 4 and the folding container 1 is changed from the folded state to the assembled state, the pair of short side side wall portions 7 Is set to the upright position first, and then the long side side wall portion 6 is set to the upright position. In the assembled state, the pair of long side side wall portions may be set to the upright position first, and then the short side side wall portions may be set to the upright position. When this configuration is adopted, an engaging wall and an elastic locking piece are provided on the side wall portion on the long side, and an accommodating portion is provided corresponding to the base portion on the short side.

Further, in the above embodiment, the pair of long side side wall portions 6 which are laid down are both in contact with the upper surface of the bottom wall portion 3 and are configured to have the same height position, but the pair of lengths. Of the side side wall portions 6, the other long side side wall portion 6 is set to the laying position on the upper side of one of the long side side wall portions 6 which is the laid position, and the long side side side wall portions 6 overlap each other vertically. It may be configured as follows.

In addition, in the above embodiment, the number, arrangement, width, etc. of the long side hinge portion 34 (long side bearing portion 8) and the short side hinge portion 14 (short side bearing portion 9) are described. It is not particularly limited and can be changed as appropriate. However, in order to increase the strength of the peripheral portion of the accommodating portion 51 provided on the long side base portion 4, it is desirable that the long side bearing portion 8 is provided at least in the vicinity of one side of the accommodating portion 51. 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 above embodiment is made of polypropylene, it may be made of other resin materials such as polyethylene, PET, and polyamide.

1 ... Folding container, 2 ... Bottom wall component, 3 ... Bottom wall, 4 ... Long side base, 5 ... Short side base, 6 ... Long side side wall, 7 ... Short side side wall, 8 ... long side bearing part, 9 ... short side bearing part, 15 ... engaging wall, 16 ... engaging hole part, 17 ... elastic locking piece, 37 ... engaging protrusion, 51 ... accommodating part, 53 ... stopper Part, 55 ... Opening, 59 ... Mold.

Claims (3)

A bottom wall portion having a substantially rectangular shape in a plan view, and a bottom wall component portion provided with a base portion provided along each side portion of the bottom wall portion.
With respect to each base portion of the bottom wall component portion, the standing position erected above each base portion and the laying position laid above the bottom wall portion are rotatably and displaceably connected to each other. With a side wall,
In a folding container whose state can be changed between an assembled state in which all the side wall portions are in the upright position and a folded state in which all the side wall portions are in the laying position.
The base portion is a pair of facing first base portions protruding upward from the pair of opposite side sides of the bottom wall portion, and a pair of facing base portions having a height lower than that of the first base portion. Equipped with the second base part of
The side wall portion includes a pair of first side wall portions connected to each of the first base portions, and a pair of second side wall portions connected to each of the second base portions.
In a configuration in which the pair of first side wall portions can be set to the upright position and the second side wall portion can be set to the upright position when the folded state is changed to the assembled state.
The first side wall portion is
It is configured to be elastically deformable in the thickness direction of the first side wall portion, and is in contact with or close to the inner surface of the second side wall portion in the upright position in the assembled state, of the second side wall portion. An elastic locking piece that regulates the inward displacement of the folding container,
A stopper portion that is arranged outside the folding container of the elastic locking piece and comes into contact with the elastic locking piece that has been deformed by a certain amount toward the outside of the folding container to regulate further deformation. I have
Support protrusions protruding from the inner surface of the first side wall are provided on both sides of the first side wall.
An opening is provided to open a space between the elastic locking piece and the stopper portion to the side of the first side wall portion, and the support is provided on the tip end side of the elastic locking piece. A folding container characterized by the location of the ridge. The folding container according to claim 1, wherein the stopper portion is provided so as to be in contact with the outer surface of the elastic locking piece on the tip end side. The folding according to claim 1 or 2 , wherein at least a part of the tip end portion of the elastic locking piece and the stopper portion are arranged so as to overlap each other in the thickness direction of the first side wall portion. container.

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