JP2019189243A - Foldable container - Google Patents

Abstract

To provide a foldable container in which durability of an elastic locking piece can be improved while avoiding deterioration in operability of the elastic locking piece.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. The side wall parts 7 at the short sides are configured to be elastically deformable in a thickness direction thereof and comprise elastic locking pieces 17 that can contact inner surfaces of the side wall parts 6 at the long sides at the standing position and stopper parts 53 that contact the elastic locking pieces 17 deforming by a given deformation quantity toward outside of the foldable container 1 to regulate the pieces from further deforming.SELECTED DRAWING: Figure 12

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. In addition, the folding container is configured to be elastically deformable in the thickness direction of the first side wall part with respect to the first side wall part in order to prevent the inward displacement of the second side wall part in the assembled state of the folding container. In the assembled state, there is a technique of providing an elastic locking piece that comes into contact with the inner surface of the second side wall (see, for example, Patent Document 1).

JP 2003-335329 A

  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 restricts the inward displacement of the second side wall portion) varies depending on the operator. For this reason, for example, when the elastic locking piece is operated with a too strong force, there is a concern that the elastic locking piece may be damaged or plastically deformed. On the other hand, it is possible to increase the strength of the elastic locking piece by increasing the number of reinforcing ribs provided on the back side of the elastic locking piece or by increasing the thickness of the reinforcing rib. There is a concern that it becomes difficult to operate the piece.

  The present invention has been made to solve the above-described problems and the like, and its purpose is to improve the durability of the elastic locking piece while avoiding a decrease in the operability of the elastic locking piece. It is to provide a folding container that can be used.

  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 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,
The first side wall portion is
The second side wall portion is configured to be elastically deformable in the thickness direction of the first side wall portion, and in contact with or close to the inner surface of the second side wall portion in the upright position in the assembled state. An elastic locking piece that regulates the inward displacement of the folding container;
A stopper portion that is disposed outside the folding container of the elastic locking piece, contacts the elastic locking piece that has undergone a certain amount of deformation toward the outside of the folding container, and restricts further deformation; A folding container characterized by comprising.

  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 excessively deformed while making the elastic locking piece relatively easily elastically deformed. This can prevent the elastic locking piece from being damaged or plastically deformed. Accordingly, 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 operator who operates the elastic locking piece, thereby improving workability when folding the folding container. be able to.

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

  According to the means 2, deformation of the elastic locking piece can be effectively prevented. That is, the deformation of the elastic locking piece at the base portion side can be restricted as in the case where the stopper portion is configured to come into contact with the base portion of the outer surface of the elastic locking piece, but the deformation at the tip end side is restricted. You can avoid situations where you can't. Furthermore, since it is conceivable that the operation of pressing the elastic locking piece is performed by pressing the tip end side of the inner surface of the elastic locking piece, by supporting the portion on the back side with the stopper portion, Deformation can be more effectively regulated.

Means 3. Support protrusions protruding from the inner surface of the first side wall are provided on both sides of the first side wall,
The folding container according to means 1 or 2, further comprising an opening for opening a space between the elastic locking piece and the stopper portion to a side of the first side wall portion.

  According to the means 3, the portion where the elastic locking piece and the stopper portion are opposed to each other (elastic locking piece) by the mold for forming the outer surface side of the support protruding portion or the hole passing through the supporting protruding portion. At least a part of the outer surface 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, etc., the elastic locking piece and the stopper portion face each other. The part which shape | molds the existing part can be provided). Therefore, it is possible to reliably form the first side wall portion having the stopper portion with a relatively simple mold structure.

  The support protrusion is provided with an engagement hole that penetrates in the width direction of the first side wall, and on the outer surface side of the second side wall, the support protrusion is in the assembled state. It is good also as providing the engagement protrusion inserted in an engagement hole part.

  Means 4. At least one part of the front-end | tip part of the said elastic locking piece and the said stopper part are overlapped and arrange | positioned in the thickness direction of the said 1st side wall part, The any one of the means 1 thru | or 3 characterized by the above-mentioned. Folding container.

  According to the means 4, the situation that another member contacts the front-end | tip part of an elastic locking piece from the outer surface side of a 1st side wall part can be suppressed. Accordingly, the elastic locking piece can be protected. Further, when the folding container in the assembled state is brought into the folded state, the elastic locking piece is released to release the locked state of the elastic locking piece that restricts the inward displacement of the folding container of the second side wall portion. When pressing the piece outward from the folding container, for example, when pressing the elastic locking piece with the thumb, the side opposite to the support surface that can be supported by contacting the elastic locking piece of the stopper portion An index finger or the like can be hung on the back surface (outer surface). Thereby, it becomes easy to press the elastic locking piece, and the folding workability of the folding container can be improved.

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 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. The configuration is related to the main engaging projection 37.

  On the other hand, as shown in FIG. 5, the portion corresponding to the engagement hole portion 16 that protrudes laterally from the side portion of the long-side base plate 31 in the short-side side wall portion 7 is related to this. The base convex portion 38 is omitted so that the mating protrusion 37 can be inserted into the engaging hole portion 16. Thereby, the strength of both side portions of the short side wall portion 7 is improved, and the engagement hole portion 16 is made while making the lateral width of the engagement protrusion 37 as large as possible without increasing the protrusion length of the engagement wall 15. It is possible to suppress a decrease in the strength of the peripheral part. An engagement protrusion 37 that protrudes slightly to the side of the long side base plate 31 is inserted between the pair of short side base parts 5 on the inner surface side of the short side base part 5. A recess is provided for the purpose.

  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 short side wall 7 is formed on the outer side of the folding container 1 of the elastic locking piece 17 configured to be elastically deformable in the thickness direction of the short side wall 7. The stopper part 53 which contact | abuts to the elastic locking piece 17 which is arrange | positioned in the direction and performed the deformation | transformation of the fixed amount toward the outward of the folding container 1, and controls the further deformation | transformation is provided. Since the amount of deformation of the elastic locking piece 17 is limited by the stopper portion 53, the elastic locking piece 17 is excessively deformed while the elastic locking piece 17 has a strength that can be relatively elastically deformed. Thus, the elastic locking piece 17 can be prevented 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 operator who operates the elastic locking piece 17, and the workability when folding the folding container 1 is improved. Etc. can be achieved.

  Moreover, the stopper part 53 is provided so that contact | abutting with the outer surface by the side of the front-end | tip part of the elastic locking piece 17 is possible. For this reason, deformation of the elastic locking piece 17 can be effectively prevented. That is, the deformation of the base portion side of the elastic locking piece 17 can be restricted as in the case where the stopper portion 53 is configured to be able to contact the base portion side of the outer surface of the elastic locking piece 17, but A situation in which the deformation cannot be regulated can be avoided. Further, the pressing operation of the elastic locking piece 17 can be considered as pressing the front end side of the inner surface of the elastic locking piece 17. The deformation of the stop piece 17 can be more effectively regulated.

  Further, the short side wall 7 is provided with an opening 55 that opens a space between the elastic locking piece 17 and the stopper 53 to the side of the short side wall 7. For this reason, the part which the elastic locking piece 17 and the stopper part 53 have opposed by the metal mold | die 59 which shape | molds the outer surface side of the engagement wall 15, the engagement hole part 16 etc. which penetrate the engagement wall 15, etc. (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 engagement wall 15 and the like, the elastic locking piece 17 And the site | part which shape | molds the site | part which the stopper part 53 has opposed) can be provided. Therefore, it is possible to reliably form the short side wall 7 having the stopper 53 with a relatively simple mold structure.

  In addition, in the present embodiment, at least a part of the distal end portion of the elastic locking piece 17 and the stopper portion 53 are overlapped in the thickness direction of the short side wall portion 7. For this reason, the situation where another member contacts the front-end | tip part of the elastic locking piece 17 from the outer surface side of the short side wall part 7 can be suppressed. Therefore, the elastic locking piece 17 can be protected. Further, when the folding container 1 in the assembled state is brought into the folded state, the elastic locking piece 17 that restricts the inward displacement of the folding container 1 of the long side wall portion 6 should be released. When pressing the elastic locking piece 17 outward of the folding container 1, for example, when pressing the elastic locking piece 17 with the thumb, the elastic locking piece 17 contacts the elastic locking piece 17. An index finger or the like can be hung on the back surface (outer surface) opposite to the support surface that can be supported. Thereby, it becomes easy to press the elastic locking piece 17 and the folding workability of the folding container 1 can be improved.

  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 addition, the engagement hole portion 16 into which the engagement protrusion 37 is inserted and engaged may be configured not to penetrate the engagement wall 15, but by inserting the engagement protrusion 37, the engagement protrusion 37 is inserted and engaged. Can be molded with a mold 59 for molding the outer surface of the engaging wall 15 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.

  (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, 6 ... Long side side wall part, 7 ... Short side wall part, DESCRIPTION OF SYMBOLS 8 ... Long side side bearing part, 9 ... Short side side bearing part, 15 ... Engagement wall, 16 ... Engagement hole part, 17 ... Elastic locking piece, 37 ... Engagement protrusion, 51 ... Housing part, 53 ... Stopper 55, opening, 59 ... mold.

Claims (4)

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,
The first side wall portion is
The second side wall portion is configured to be elastically deformable in the thickness direction of the first side wall portion, and in contact with or close to the inner surface of the second side wall portion in the upright position in the assembled state. An elastic locking piece that regulates the inward displacement of the folding container;
A stopper portion that is disposed outside the folding container of the elastic locking piece, contacts the elastic locking piece that has undergone a certain amount of deformation toward the outside of the folding container, and restricts further deformation; A folding container characterized by comprising.   2. The folding container according to claim 1, wherein the stopper portion is provided so as to be able to contact an outer surface of the elastic locking piece on a tip end portion side. Support protrusions protruding from the inner surface of the first side wall are provided on both sides of the first side wall,
The folding container according to claim 1 or 2, wherein an opening for opening a space between the elastic locking piece and the stopper portion to a side of the first side wall portion is provided.   The at least part of the front-end | tip part of the said elastic locking piece and the said stopper part are arrange | positioned overlappingly in the thickness direction of the said 1st side wall part, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. The described folding container.

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