JP2021050002A - Folding container - Google Patents

Abstract

To provide a folding container which can easily improve rigidity and strength of a bottom plate.SOLUTION: A folding container 1 includes a rectangular bottom plate 2, a pair of first side plates 3 and a pair of second side plates 4. The folding container 1 can selectively constitute: a folded state in which the pair of second side plates 4 is laid on the pair of first side plates 3 which is laid on the bottom plate 2; and an assembled state in which a side wall 5 is formed which has a rectangular shape in a plan view. The bottom plate 2 has a second side plate support end part 26 at an end part of a portion positioned below the second side plate 4 in an assembled state. The second side plate support end part 26 includes at least two vertical ribs 201(2011, 2012) out of a plurality of longitudinal ribs 201 extending in the vertical direction formed on an outside surface of the bottom plate 2. The second side plate support end part 26 includes a cross rib 28 for connecting the longitudinal ribs 201 included in the second side plate support end part 26. The cross rib 28 is inclined so as to be positioned further below toward the first side plate 3 in an assembled state.SELECTED DRAWING: Figure 7

Description

The present invention relates to a folding container.

Conventionally, there is known a folding container that includes a bottom plate, a first side plate, and a second side plate, and can selectively configure a folded state and an assembled state (see, for example, Patent Document 1).

The first side plate is rotatably attached to the pair of opposite sides of the bottom plate, and the second side plate is rotatably attached to the other pair of opposite sides of the bottom plate. By tilting the pair of first side plates on the bottom plate and then tilting the pair of second side plates, the folded state can be obtained. Further, after the pair of the second side plates is erected, the pair of the first side plates is erected, and the pair of the first side plates and the pair of the second side plates form a side wall having a rectangular shape in a plan view. It can be assembled.

Ribs are formed on the outer surfaces of the side wall and bottom plate mainly for reinforcement. The ribs have a plurality of vertical ribs formed at intervals in the horizontal direction.

Multiple folding containers can be stacked. That is, the bottom plate of the upper assembled folding container is placed on the side wall of the lower assembled folding container, or the upper folded container is placed on the bottom plate of the lower folded container. The bottom plate can be placed.

Japanese Patent No. 391165

In the folding containers as described above, when stacked, an excessive load is applied to the side wall of the lowermost folding container, but since there is a space under the side wall, the bottom plate tends to bend and deform. At this time, although the vertical ribs are formed on the outer surface of the bottom plate, there is a problem that it is difficult to suppress the deformation between the vertical ribs and it is difficult to improve the rigidity and strength of the bottom plate.

The present invention has been invented in view of the above-mentioned conventional problems, and an object of the present invention is to provide a folding container in which the rigidity and strength of the bottom plate can be easily improved.

In order to solve the above problems, the folding container of one form according to the present invention includes a rectangular bottom plate, a pair of first side plates, and a pair of second side plates. The first side plate is rotatably attached to a pair of opposite sides of the bottom plate. The second side plate is rotatably attached to each of the other pair of opposite sides of the bottom plate. The folding container includes a folded state in which a pair of the first side plates are laid down on the bottom plate and a pair of the second side plates are laid down, and a pair of the first side plates after the pair of the second side plates are erected. It is possible to selectively configure a state in which one side plate is erected and a side wall having a rectangular shape in a plan view is formed by the pair of the first side plates and the pair of the second side plates.

The bottom plate has a second side plate support end at an end of a portion located below the second side plate in the assembled state. The second side plate support end includes at least two of the vertically extending vertical ribs formed on the outer surface of the bottom plate. The second side plate support end portion has a horizontal rib connecting the vertical ribs included in the second side plate support end portion. The lateral rib is inclined so as to be positioned downward toward the first side plate in the assembled state.

In the folding container according to the present invention, it is easy to improve the rigidity and strength of the bottom plate.

FIG. 1 is a perspective view of an assembled state of the folding container according to the embodiment. FIG. 2 is a perspective view of the folded state of the folding container of the same as above. FIG. 3A is a perspective view of the bottom plate of the folding container of the same as above. FIG. 3B is an enlarged view of the portion surrounded by the alternate long and short dash line in FIG. 3A. FIG. 4A is a perspective view of the first side plate of the folding container of the same as above. FIG. 4B is an enlarged view of the portion surrounded by the alternate long and short dash line in FIG. 4A. FIG. 5A is a perspective view of the horizontal cross section of the lock member portion of the first side plate of the same as above, viewed from diagonally above. FIG. 5B is a perspective view of the recessed portion of the first side plate of the same as above, viewed from diagonally above. FIG. 5C is a vertical cross-sectional view of the same recess and the portion of the lock member. FIG. 6A is a perspective view of the second side plate of the folding container of the same as above. FIG. 6B is an enlarged view of the portion surrounded by the alternate long and short dash line of FIG. 6A. FIG. 7A is a perspective view of the portion of the second side plate support end portion of the same bottom plate as viewed from diagonally above. FIG. 7B is an enlarged front view of the second side plate support end portion of the same as above. FIG. 8A is a front view seen from the outside of the second side plate of the same. FIG. 8B is an enlarged view of the portion surrounded by the alternate long and short dash line in FIG. 8A. FIG. 9A is a front view seen from the outside of the first side plate of the same. FIG. 9B is an enlarged view of the portion surrounded by the alternate long and short dash line of FIG. 9A. FIG. 10A is a front view seen from the inside of the second side plate of the same. FIG. 10B is an enlarged view of the portion surrounded by the alternate long and short dash line in FIG. 10A. FIG. 11A is a partially enlarged perspective view of the lower rib of the second side plate of the same as seen from the outside. FIG. 11B is a partially enlarged view of the horizontal cross section of the lower rib portion of the same. FIG. 11C is a partially enlarged view of a cross section perpendicular to the left-right direction of the lower rib portion of the same. FIG. 11D is a partially enlarged view of a cross section perpendicular to the front-rear direction of the lower rib portion of the same. FIG. 12A is a partially enlarged perspective view of a low rib seen from the outside in a modified example of the folding container of the same as above. FIG. 12B is a partially enlarged perspective view of the low ribs viewed from the outside in another modification of the folding container of the same. FIG. 13 is a vertical cross-sectional view of the same folding container in an assembled state. FIG. 14A is a horizontal cross-sectional view showing the relationship between the second convex portion and the first facing portion in the assembled state of the folding container as described above. FIG. 14B is a horizontal cross-sectional view showing the relationship between the first convex portion and the second facing portion in the assembled state of the folding container as described above. FIG. 14C is a horizontal cross-sectional view showing the relationship between the first facing portion and the second facing portion in the assembled state of the folding container as described above. FIG. 15 is a partially enlarged plan view of a modified example of the folding container of the above. FIG. 16A is a partially enlarged perspective view of the low convex portion of the second side plate of the further modified example as viewed from the outside. FIG. 16B is a partially enlarged view of the horizontal cross section of the lower convex portion of the same. FIG. 16C is a partially enlarged view of a cross section perpendicular to the left-right direction of the lower convex portion of the same. FIG. 16D is a partially enlarged view of a cross section perpendicular to the front-rear direction of the lower convex portion of the same.

The present invention relates to a folding container, and more specifically, a folding container including a bottom plate, a first side plate, and a second side plate, and the assembled state shown in FIG. 1 and the folded state shown in FIG. 2 can be selectively configured. Regarding containers. Hereinafter, the folding container according to the embodiment of the present invention will be described with reference to FIGS. 1 to 13.

As shown in FIG. 1, the folding container 1 according to the present embodiment includes a bottom plate 2, a pair of first side plates 3, and a pair of second side plates 4. For convenience, the direction is defined as shown in FIG. That is, with the center of the folding container 1 as a reference, the bottom plate 2 is downward and the opposite is upward, the first side plate 3 is front and the opposite is rear, and the rear is viewed from the front. The left and right sides of the time are left and right, respectively.

As shown in FIG. 3A, the bottom plate 2 has a rectangular shape (particularly a rectangular shape) in a plan view. The bottom plate 2 has a bottom portion 21, a first rising portion 22, and a second rising portion 24. The bottom portion 21 has a rectangular shape (particularly a rectangular shape) in a plan view. Although not shown, ribs having a plan view (bottom view) grid pattern are formed downward on the lower surface of the bottom portion 21. The bottom portion 21 is formed in a mesh shape having through holes penetrating vertically in the portion surrounded by the ribs.

A first rising portion 22 is provided at each end on the short side side of the bottom portion 21 in a plan view. The first rising portion 22 projects upward from each of the ends of the pair of short sides in the plan view of the bottom portion 21 at a predetermined protruding height. The first rising portion 22 is formed integrally with the bottom portion 21. The first rising portion 22 has a rectangular shape when viewed in the front-rear direction. As shown in FIG. 3B, the first rising portion 22 is formed with a first connecting portion 23 to which the first side plate 3 is connected.

As shown in FIG. 3A, a second rising portion 24 is provided at each end on the long side side of the bottom portion 21 in a plan view. The second rising portion 24 projects upward from the ends of the pair of long sides in the plan view of the bottom portion 21 at a protruding height higher than the protruding height of the first rising portion 22. The second rising portion 24 is formed integrally with the bottom portion 21. The second rising portion 24 has a rectangular shape when viewed in the left-right direction. The second rising portion 24 is formed in a mesh shape having a large number of through holes penetrating to the left and right. As shown in FIG. 3B, a second connecting portion 25 to which the second side plate 4 is connected is formed in the second rising portion 24.

The bottom plate 2 has a second side plate support end portion 26 at an end portion of a portion located below the second side plate 4 in the assembled state. The second side plate support end portion 26 projects upward from the upper surface of the central portion of the bottom portion 21 at the end portion on the long side side of the bottom portion 21. In the present embodiment, both ends of the second rising portion 24 in the longitudinal direction are the second side plate supporting end portions 26, respectively.

Further, the bottom plate 2 has a second side plate support intermediate portion 27. The second side plate support intermediate portion 27 is located in the middle portion of the portion located below the second side plate 4 in the assembled state, that is, between both the second side plate support end portions 26. In the present embodiment, the portion between both the second side plate support end portions 26 of the second rising portion 24 is the second side plate support intermediate portion 27.

The protruding height of the second side plate supporting end portion 26 from the upper surface of the central portion of the bottom portion 21 is higher than the protruding height of the second side plate supporting intermediate portion 27 from the upper surface of the central portion of the bottom portion 21. That is, the upper surface of the second side plate support end portion 26 is higher than the upper surface of the second side plate support intermediate portion 27. Further, in the present embodiment, since the intermediate portion in the longitudinal direction of the second rising portion 24 is the second side plate supporting intermediate portion 27, the upper surface of the second side plate supporting intermediate portion 27 is the central portion of the bottom portion 21. Although higher than the upper surface, the upper surface of the second side plate support intermediate portion 27 may be flush with the upper surface of the central portion of the bottom portion 21. The bottom 21 will be further described later.

As shown in FIGS. 4A and 9A, the first side plate 3 is rotatably attached to a pair of opposite sides (short sides in this embodiment) of the bottom plate 2. The first side plate 3 has a rectangular shape (particularly a square shape) when viewed in the front-rear direction. Ribs 31 are formed on the outer surface of the first side plate 3 so as to face outward. Here, regarding the inside and outside, of the thickness directions of the first side plate 3 and the second side plate 4 in the assembled state, the inner side in the folding container 1 is the inner side and the outer side is the outer side. The rib 31 is composed of a plurality of vertical ribs 311 that are separated in the left-right direction and extend in the vertical direction, and a plurality of horizontal ribs 312 that are separated in the vertical direction and extend in the left-right direction. The first side plate 3 is formed in a mesh shape having a large number of through holes penetrating back and forth. The first side plate 3 is formed with a handle opening 32 having a rectangular shape long in the left-right direction at the central portion in the left-right direction and the upper part in the up-down direction.

A flat portion 37 on which the rib 31 is not formed is formed on the outer surface of the first side plate 3. As the flat portion 37, the flat portion 371 extending vertically at both ends in the lateral direction of the upper end portion of the first side plate 3, the flat portion 372 extending left and right on the upper and lower sides of the handle opening 32, and the upper end portion of the handle opening 32 Flat portions 373 extending vertically are formed at both ends in the lateral direction on the lower side.

A lock member 33 is provided on the first side plate 3. The lock member 33 is arranged in the upper portion of the handle opening 32 of the first side plate 3. As shown in FIG. 4B, an inwardly recessed recess 34 having a long rectangular shape in the left-right direction is formed in the upper portion of the handle opening 32 on the outer surface of the first side plate 3. The lock member 33 has a rectangular shape that is long in the left-right direction, the length in the left-right direction is slightly shorter than the length in the left-right direction of the recess 34, and the length in the up-down direction is the length in the up-down direction of the recess 34. It's about half. The lock member 33 is housed in the recess 34 and does not move in the left-right direction, but can move in the up-down direction. Lock convex portions 331 projecting to the left and right are formed at the left and right ends of the lock member 33, respectively. The lock convex portion 331 penetrates the weir-shaped portion surrounding the recess 34 of the first side plate 3 and projects to the left and right of the weir-shaped portion, whereby the lock member 33 is prevented from coming off from the recess 34. ing. The portion of the weir-shaped portion that penetrates the lock convex portion 331 is a long hole that is long in the vertical direction, and the lock convex portion 331 (lock member 33) can be moved in the vertical direction.

The lock member 33 is located at the upper end of the recess 34 when an upward force is applied by an elastic portion 332 such as a leaf spring formed on a part of the lock member 33 and no external force is applied. When a downward external force is applied to the lock member 33, the lock member 33 moves toward the lower end of the recess 34.

As shown in FIG. 5A, the lock member 33 has a hook piece 333 on a surface facing the inner surface of the recess 34. As shown in FIG. 5B, the inner surface of the recess 34 has a hook receiving piece 341 extending in the vertical direction. The lock member 33 moves up and down in the recess 34 in a state where the hook piece 333 of the lock member 33 is hooked on the hook receiving piece 341 of the recess 34 and the lock member 33 is prevented from coming off from the recess 34. It will be possible.

Inclined ribs 342 are formed on the inner surface of the recess 34. As shown in FIG. 5C, the protruding end surface of the inclined rib 342 is inclined so that the protruding length from the inner surface of the recess 34 becomes longer toward the lower side. The angle of inclination of the protruding end surface of the inclined rib 342 with respect to the inner surface of the recess 34 may be 0.5 ° or more and 5 ° or less, more preferably 1 ° or more and 2 ° or less. By forming the inclined rib 342, the operation surface 334 which is the lower surface of the inner surface of the lock member 33 becomes substantially horizontal (including horizontal), and the user's finger can be easily hooked, so that the lock member 33 can be easily operated. .. That is, since a draft of the mold is required when molding the lock member 33, in the molded product of the lock member 33, when the surface of the lock member 33 facing the surface of the recess 34 is made vertical, the operation is performed. The surface 334 is tilted so as to be located downward toward the side where the finger is inserted. When the operation surface 334 is tilted so as to be positioned downward toward the side where the finger is inserted, it is difficult to hook the finger on the operation surface 334 and move the lock member 33 downward. In the present embodiment, since the inclined rib 342 is formed, the entire lock member 33 can be tilted so that the operation surface 334 can be made substantially horizontal, so that a finger can be easily caught. By forming the inclined rib 342, the operation surface 334 may be inclined so as not to be substantially horizontal but to be positioned upward toward the side where the finger is inserted.

As shown in FIG. 4A, the first side plate 3 is provided with a connecting portion 35 connected to the bottom plate 2. The connecting portion 35 projects downward from the lower end surface of the first side plate 3. The connecting portion 35 is composed of a base portion that protrudes downward from the lower end surface of the first side plate 3 and a shaft portion that protrudes from the base portion in the left-right direction. On the other hand, as shown in FIG. 3B, the first connecting portion 23 formed in the first rising portion 22 has a receiving portion into which the shaft portion is inserted. The shaft portion is inserted into the receiving portion in a state where the shaft portion is prevented from coming off from the receiving portion. That is, the first side plate 3 is rotatably attached to the bottom plate 2 by the bearing structure composed of the shaft portion of the connecting portion 35 and the receiving portion of the first connecting portion 23. In the present embodiment, the connecting portion 35 has a shaft portion and the first connecting portion 23 has a receiving portion, but the connecting portion 35 has a receiving portion and the first connecting portion 23 has a shaft portion. You may have.

As shown in FIG. 2, the second side plate 4 is rotatably attached to each of the other pair of opposite sides of the bottom plate 2. As shown in FIG. 6A, the second side plate 4 has a rectangular shape (particularly a rectangular shape) when viewed in the left-right direction. As shown in FIG. 1, ribs 41 are formed on the outer surface of the second side plate 4 so as to face outward. The rib 41 is composed of a plurality of vertical ribs 411 that are separated in the front-rear direction and extend in the vertical direction, and a plurality of horizontal ribs 412 that are separated in the vertical direction and extend in the front-rear direction. The second side plate 4 is formed in a mesh shape having a large number of through holes penetrating the front and rear. As shown in FIG. 6A, the second side plate 4 is formed with a handle opening 42 having a long rectangular shape in the front-rear direction at the central portion in the front-rear direction and the upper part in the up-down direction.

The second side plate 4 is provided with a connecting portion 43 connected to the bottom plate 2. The connecting portion 43 projects downward from the lower end surface of the second side plate 4. The connecting portion 43 is composed of a base portion protruding downward from the lower end surface of the second side plate 4 and a shaft portion protruding downward from the base portion in the front-rear direction. On the other hand, as shown in FIG. 3B, the second connecting portion 25 formed in the second rising portion 24 has a receiving portion into which the shaft portion is inserted. The receiving portion is formed longer than the shaft portion in the vertical direction. The shaft portion is inserted into the receiving portion in a state where it is prevented from coming off from the receiving portion, and is configured to be movable up and down in the receiving portion. That is, the second side plate 4 is rotatably attached to the bottom plate 2 by the bearing structure composed of the shaft portion included in the connecting portion 43 and the receiving portion included in the second connecting portion 25. In the present embodiment, the connecting portion 43 has a shaft portion and the second connecting portion 25 has a receiving portion, but the connecting portion 43 has a receiving portion and the second connecting portion 25 has a shaft portion. You may have.

As shown in FIG. 6B, the second side plate 4 has a fall prevention portion 44 that prevents the first side plate 3 that stands up against the bottom plate 2 from falling outward. The fall prevention portion 44 is formed of a vertically long rectangular receiving piece protruding inward from the upper portion of the second side plate 4 at both ends in the front-rear direction. The fall prevention portion 44 has a lock portion 45 formed of a hook piece on the inward side in the front-rear direction. The lock convex portion 331 of the first side plate 3 that is later erected with respect to the bottom plate 2 is hooked on the lock portion 45 of the second side plate 4 that is erected first with respect to the bottom plate 2. The lock convex portion 331 of the first side plate 3 which is erected afterwards as shown in FIG. 4B comes into contact with the lock portion 45 shown in FIG. 6B from the rear. As shown in FIG. 6B, the lower end portion of the lock portion 45 is inclined so as to be positioned downward toward the front, and as shown in FIG. 4B, the upper end portion of the lock convex portion 331 is inclined downward toward the front. It is tilted to be located. As a result, when the lock convex portion 331 of the first side plate 3 standing up later comes into contact with the lock portion 45 from the rear, the lock convex portion 331 moves downward and crosses the lower side of the lock portion 45, and the lock convex portion When the 331 moves to the front of the lock portion 45, the lock convex portion 331 moves upward and is located in front of the lock portion 45 and behind the fall prevention portion 44 to be in a locked state. As a result, the first side plate 3 that stands up against the bottom plate 2 is prevented from falling outward and inward.

Further, in order to release the locked state, the user may move the lock member 33 downward. As a result, the lock convex portion 331 is located below the lock portion 45. Therefore, when the first side plate 3 is tilted inward, the lock convex portion 331 moves inward through the lower side of the lock portion 45. The locked state is released.

As shown in FIG. 2, the folding container 1 can be put into a folded state by tilting a pair of first side plates 3 on a bottom plate 2 and then tilting a pair of second side plates 4. Since the protruding height of the second rising portion 24 to which the second side plate 4 is connected is higher than the protruding height of the first rising portion 22 to which the first side plate 3 is connected, such a folded state occurs. It is possible.

Further, the pair of first side plates 3 that are laid down on the bottom plate 2 do not come into contact with each other. On the other hand, the pair of second side plates 4 that are laid down on the bottom plate 2 and the pair of second side plates 4 that are laid down on the bottom plate 2 are vertically overlapped, but any of the second side plates 4 is located on the upper side. May be good.

Further, as shown in FIG. 1, the folding container 1 has a pair of first side plates 3 and a pair of second side plates 3 by erecting a pair of first side plates 3 after erecting a pair of second side plates 4. A side plate 5 having a rectangular shape in a plan view can be formed by the side plate 4 of the above. The folding container 1 can be selectively configured in an assembled state and a folded state.

Further, a plurality of folding containers 1 in the assembled state can be stacked. That is, the bottom plate 2 of the upper assembled folding container 1 can be placed on the side wall 5 of the lower assembled folding container 1. It is also possible to stack the folded containers 1 in the assembled state of three or more stages in the same manner.

As shown in FIG. 7A, a plurality of vertical ribs 201 extending in the vertical direction are formed on the outer surface of the bottom plate 2. In the present embodiment, the vertical ribs 201 are formed on the outer surface of the second rising portion 24, and the vertical ribs 201 are not formed on the outer surface of the first rising portion 22. The vertical rib 201 may be formed on the outer surface of the first rising portion 22.

As shown in FIG. 7B, two vertical ribs 201 are formed on the outer surface of the second side plate support end portion 26 with a lateral spacing, and as shown in FIG. 7A, the second side plate support intermediate portion is formed. A plurality of lines are formed on the outer surface of 27 at intervals in the lateral direction. Of the vertical ribs 201 formed on the second side plate support end portion 26, the inner side (the side of the first side plate 3 and the left side in FIG. 7B) is referred to as the inner vertical rib 2011, and the outer side (right side in FIG. 7B). The outer vertical rib 2012 is used. In addition, three or more vertical ribs 201 may be formed on the outer surface of the second side plate support end portion 26.

By forming such a vertical rib 201 on the outer surface of the second rising portion 24, the rigidity and strength of the bottom plate 2 (particularly the second rising portion 24) are improved. That is, when a plurality of folded containers 1 in the assembled state are stacked, an excessive load is applied to the second rising portion 24 of the lowermost folding container 1. When the vertical rib 201 is not formed on the second rising portion 24, when an excessive load is applied to the second rising portion 24, a space is formed on the lower side of the second side plate supporting end portion 26, so that the bottom plate 2 Is easily deformed by bending, and if the deformation exceeds a certain level, it may be destroyed. By forming the vertical ribs 201 on the second rising portion 24, even if a plurality of folded containers 1 in the assembled state are stacked, the second rising portion 24 is not easily deformed and is not easily broken.

The second side plate support end portion 26 has a horizontal rib 28 connecting the vertical ribs 201 included in the second side plate support end portion 26. In the present embodiment, two horizontal ribs 28 are formed in the middle portion of the vertical ribs 201 at intervals of upper and lower parts. Of the two lateral ribs 28, the upper one is referred to as an upper lateral rib 281 and the lower one is referred to as a lower lateral rib 282. The upper lateral rib 281 and the lower lateral rib 282 are vertically separated and parallel to each other. The lateral rib 28 may be formed to be thicker than the intermediate lateral rib 271. In the present embodiment, two horizontal ribs 28 are provided, but three or more horizontal ribs 28 may be provided.

The lateral rib 28 is inclined so as to be positioned downward toward the first side plate 3 in the assembled state. In other words, the horizontal rib 28 is inclined downward from the outer vertical rib 2012 to the inner vertical rib 2011.

By forming the lateral rib 28 on the second side plate support end portion 26, the rigidity and strength of the second rising portion 24 (particularly the second side plate support end portion 26) are further improved. That is, as compared with the case where the lateral rib 28 is not formed on the second side plate support end portion 26, the second side plate support end portion 26 is less likely to be deformed or broken due to bending.

Further, since the horizontal rib 28 is inclined downward from the outer vertical rib 2012 to the inner vertical rib 2011, the load applied to the second side plate support end portion 26 is increased as compared with the case where the horizontal rib 28 is horizontal. It can be transmitted to the inside of the bottom plate 2 more, and the bending of the bottom plate 2 can be easily suppressed.

Further, the lower end of the lower lateral rib 282 is continuous with the upper surface of the first rising portion 22. As a result, the load applied to the lower lateral rib 282 can be better transmitted to the first rising portion 22.

The second side plate support intermediate portion 27 has an intermediate portion lateral rib 271. The intermediate portion horizontal rib 271 connects the vertical rib 201 included in the second side plate support intermediate portion 27. The intermediate portion horizontal rib 271 connects the upper end portions, the intermediate portions, and the lower end portions of the vertical ribs 201. By forming the intermediate portion lateral rib 271 on the second side plate support intermediate portion 27, the rigidity and strength of the second side plate support intermediate portion 27 are further improved.

The intermediate portion horizontal rib 271 is further continuous with the horizontal rib 28 included in the second side plate support end portion 26 via the vertical rib 201. As a result, the vertical rib 201 is less likely to be damaged. That is, in the vertical rib 201 to which the horizontal rib 28 and the intermediate horizontal rib 271 are connected, when the portion to which the horizontal rib 28 is connected and the portion to which the intermediate horizontal rib 271 is connected are different, the horizontal rib 28 is connected. A bending moment or the like is applied between the portion to be connected and the portion where the intermediate portion lateral rib 271 is connected, and the portion is easily damaged. On the other hand, when the intermediate portion horizontal rib 271 is continuous with the horizontal rib 28 via the vertical rib 201, a bending moment or the like is less likely to be applied to the vertical rib 201, and the vertical rib 201 is less likely to be damaged.

The intermediate portion horizontal rib 271 is continuous with the upper wall rib 270 of the second side plate support intermediate portion 27 whose upper surface is lowered by one step via the vertical rib 201. Further, the intermediate horizontal rib 271 is continuous with the upper horizontal rib 281 via the vertical rib 201.

The second side plate support end portion 26 has a bulging portion 261 that bulges upward at the upper end portion. The bulging portion 261 is formed near the inner (left side in FIG. 7B) end of the upper surface of the second side plate support end portion 26, and projects upward from the outer portion of the upper surface of the second side plate support end portion 26. ing. By forming such a bulging portion 261, when the folded containers 1 in the assembled state are stacked, the load applied to the second side plate supporting end portion 26 of the lower folding container 1 is applied by the bulging portion 261. It can be received and transmitted to the inside of the bottom plate 2, and the bending of the bottom plate 2 can be easily suppressed.

Further, a first rising portion is formed at a corner formed by an end portion of the first rising portion 22 on the side of the second side plate supporting end portion 26 and an end portion of the first rising portion 22 of the second side plate supporting end portion 26. A triangular connecting rib 29 is formed to connect the upper surface of the 22 and the side surface of the second side plate support end portion 26. Also with the connecting ribs 29, when the folded containers 1 in the assembled state are stacked, the load applied to the second side plate supporting end portion 26 of the lower folding container 1 is further applied to the bottom plate 2 (first) via the connecting ribs 29. It can be transmitted to the inside of the rising portion 22), and the bending of the bottom plate 2 can be easily suppressed.

The lower end of the horizontal rib 28 (upper horizontal rib 281) is continuous with the upper end of the connecting rib 29 via the vertical rib 201 (inner vertical rib 2011). As a result, the load applied to the lateral rib 28 can be well transmitted to the connecting rib 29. The lower end of the horizontal rib 28 does not have to be continuous with the upper end of the connecting rib 29 via the vertical rib 201.

As shown in FIGS. 8B and 9B, a rib wall 6 forming an annular shape and surrounding the internal space 60 is formed on the outer surface of the side wall 5. The rib wall 6 is formed in an annular shape by a pair of vertical ribs and a pair of horizontal ribs. When the side wall 5 is the second side plate 4, as shown in FIG. 8B, a pair of adjacent vertical ribs 411 and a pair of adjacent horizontal ribs 412 form an annularly continuous rib wall 6. .. Further, when the side wall 5 is the first side plate 3, as shown in FIG. 9B, a pair of adjacent vertical ribs 311 and a pair of adjacent horizontal ribs 312 form a rib wall 6 which is continuous in an annular shape. Will be done.

As shown in FIGS. 8B and 9B, a low rib 7 projecting from the outer surface of the side wall 5 in the space at a projecting height lower than the projecting height from the outer surface of the side wall 5 of the rib wall 6 is formed. To. As shown in FIGS. 11A and 11C, the lower rib 7 has a central portion in the lateral direction of the lower lateral rib (horizontal rib 412 or lateral rib 312) and an outer surface of the side wall 5 in the space 60. It is connected integrally.

As shown in FIG. 11D, the vertical length of the low rib 7 is half the vertical length of the space 60. The low rib 7 is inclined so that the protruding height becomes higher toward the lower side of the lower rib 7. That is, the low protruding height of the rib 7 is formed to be the highest at the portion connected to the lateral rib at the lower end. The upper end of the low rib 7 is located at a position approximately half of the vertical length of the space 60, and the protruding height is zero. The protruding height at the lower end of the low rib 7 is half the protruding height from the outer surface of the side wall 5 of the rib wall 6.

As shown in FIG. 11B, the end portion of the low rib 7 that is continuous with the outer surface of the side wall 5 of the side surface 71 in the lateral direction is an inclined surface 70. In this embodiment, the inclined surface 70 is a curved surface that is curved with a radius of curvature for a low rib 7 in the continuous direction toward the outer surface of the side wall 5. Further, as shown in FIG. 11A, the end portion continuous with the outer surface of the side wall 5 on the side surface of the rib wall 6 is curved in the continuous direction to the outer surface of the side wall 5 with the radius of curvature for the rib wall 6. It becomes a face. The radius of curvature for the lower rib 7 is greater than the radius of curvature for the rib wall 6.

The above-mentioned folding container 1 is washed with washing water in an assembled state. When sprinkling the washing water, the folding container 1 is turned upside down, and the washing water is sprinkled on the lower surface of the bottom plate 2 (however, upward at this time) and the outer surface of the side wall 5. The washing water not only reaches the lower surface of the bottom plate 2 and the outer surface of the side wall 5, but also reaches the upper surface of the bottom plate 2 (but downward at this time) and the inner surface of the side wall 5 through the through holes of the mesh. At this time, as shown in FIG. 10B, a recess 46 is formed on the inner surface of the side wall 5. A rib 47 is formed between the adjacent recesses 46. The lower inner surface of the recess 46 becomes an inclined surface 48, and drainage is performed from an opening 49 formed at the lower end of the inclined surface 48. This improves the drainage performance during cleaning. Among the ribs 47, the portion 471 that is the lower end of the inclined surface 48 has the same thickness as the rib 31 and the rib 41, and the portion 472 that is the upper end of the inclined surface 48 is thicker than the rib 31 and the rib 41. thick. The recess 46, the rib 47, or the inclined surface 48 has an arbitrary configuration and may not be provided.

After washing the folding container 1 with washing water, the folding container 1 is placed in a folded state and rotated around a rotation axis extending in the vertical direction to scatter and remove the washing water remaining on the surface by centrifugal force. When the low rib 7 is not formed, the washing water remaining in the space 60 on the surface of the folding container 1 moves toward the rib wall 6 along the outer surface of the side wall 5 by centrifugal force during dehydration. .. At this time, the continuous portion of the rib wall 6 to the outer surface of the side wall 5 is a curved surface, but the radius of curvature for the rib wall 6, which is the radius of curvature thereof, is smaller than the radius of curvature for the low rib 7. Therefore, the washing water accelerated by the centrifugal force and moving toward the rib wall 6 along the outer surface of the side wall 5 does not easily change the moving direction smoothly away from the outer surface of the side wall 5, and the space 60 It is hard to be scattered outside.

On the other hand, in the present embodiment, as shown in FIGS. 8B and 9B, since the low rib 7 is formed, the washing water moving toward the rib wall 6 along the outer surface of the side wall 5 is It is easy to change the moving direction smoothly away from the outer surface of the side wall 5 along the inclined surface 70 having a radius of curvature for the rib 7 which is larger than the radius of curvature for the rib wall 6. As a result, the washing water remaining in the space 60 on the surface of the folding container 1 moves toward the rib wall 6 along the outer surface of the side wall 5 by centrifugal force during dehydration, and is moved along the inclined surface 70. The moving direction is changed to a direction away from the outer surface of the side wall 5, and the moving direction is easily scattered outside the space 60.

As shown in FIG. 13, the folding container 1 has each member, that is, so that a predetermined clearance 50 is formed between the first side plate 3 and the second side plate 4 in the assembled state by design. A bottom plate 2, a first side plate 3, and a second side plate 4 are formed. Specifically, in the assembled state, the first facing portion 30 (see FIG. 4B), which is a portion of the first side plate 3 that faces the second side plate 4 in close proximity to the second side plate 4, and the first of the second side plates 4. The clearance 50 shown in FIG. 14C is formed between the second facing portion 40 (see FIG. 6B), which is a portion facing the side plate 3 in close proximity to the side plate 3. The clearance 50 is set to have a value within an appropriate range such as 0.3 to 3 mm (preferably 0.5 to 2 mm), but is not particularly limited to these values.

When such a clearance 50 is not formed, when the folding container 1 is assembled from the folded state to the assembled state, the first side plate 3 and the second side plate 4 are likely to collide with each other, and the assembling work is difficult. By forming the clearance 50 as described above, the first side plate 3 and the second side plate 4 are less likely to collide with each other as compared with the case where the clearance 50 is not provided, and the assembly work is easy.

However, when the clearance 50 as described above is formed in the assembled state, the first side plate 3 and the second side plate 4 are relatively easy to move, so that the folding container 1 is easily deformed and twisted. Is likely to occur.

Therefore, in the present embodiment, the first convex portion 51 that reduces (or eliminates) the clearance 50 in order to suppress the occurrence of twisting due to the clearance 50 while ensuring the clearance 50 for ease of assembly work. And the second convex portion 52 is formed in the folding container 1.

As shown in FIG. 4B, the first convex portion 51 is formed on a part of the first facing portion 30 and has a predetermined protruding height. In the present embodiment, the first convex portion 51 is formed on the first facing portion 30 located near the upper end portion of the first side plate 3.

As shown in FIG. 6B, the second convex portion 52 is formed on a part of the second opposed portion 40 and has a predetermined protruding height. In the present embodiment, the second convex portion 52 is formed on the second facing portion 40 located near the upper end portion (particularly the upper end portion) of the second side plate 4.

The first convex portion 51 and the second convex portion 52 are formed at positions displaced in the vertical direction. In the present embodiment, as shown in FIG. 13, the second convex portion 52 is located above the first convex portion 51. A gap 11 is formed between the first convex portion 51 and the second convex portion 52. The formation of the gap 11 facilitates the assembly work.

The protruding height of the first convex portion 51 is the first facing portion 30 located near the upper end portion of the first side plate 3 and the second facing portion 40 located near the upper end portion of the second side plate 4. The clearance between and is set to be the same as 50 (for example, 0.5 mm). Therefore, the plane which is the protruding end surface of the first convex portion 51 comes into surface contact with the plane which is the second facing portion 40. The protruding height of the first convex portion 51 may be shorter than the clearance 50 or longer than the clearance 50. The first convex portion 51 has a first inclined portion 511 at an outer end portion whose protruding height becomes lower toward the outside (see FIGS. 4B and 14B). The surface of the first inclined portion 511 is an inclined surface made of a flat surface.

The protruding height of the second convex portion 52 is set to be the same as the clearance 50. Therefore, the plane which is the protruding end surface of the second convex portion 52 comes into surface contact with the plane which is the first facing portion 30. The protruding height of the second convex portion 52 may be shorter than the clearance 50 or longer than the clearance 50. The second convex portion 52 has a second inclined portion 521 at an inner end portion whose protruding height becomes lower toward the inward side (see FIGS. 6B and 14A). The surface of the second inclined portion 521 is an inclined surface made of a flat surface.

Further, as shown in FIG. 4B, in the present embodiment, the rib 36 is formed in a part of the first facing portion 30 of the first side plate 3. The rib 36 has an L-shape when viewed in the front-rear direction and has a horizontal piece protruding toward the second facing portion 40 and a vertical piece protruding upward from the tip of the horizontal piece.

Further, as shown in FIG. 6B, a groove portion 441 is formed in a portion of the second side plate 4 corresponding to the rib 36 of the second facing portion 40. The groove portion 441 opens downward and in the front-rear direction in which the L-shaped rib 36 is inserted when viewed in the front-rear direction.

In the assembled state of the folding container 1, the rib 36 is inserted into the groove portion 441 as shown in FIG. The rib 36 and the inner surface of the groove portion 441 are in contact with each other. As a result, the first side plate 3 and the second side plate 4 are relatively difficult to move, and the folding container 1 is less likely to be twisted.

Since the folding container 1 of the present embodiment has the first convex portion 51 and the second convex portion 52 formed, the folding container 1 in the assembled state has the first convex portion 51 and the second convex portion 51. No clearance 50 is formed in the portion where the portion 52 is formed. Therefore, in the folding container 1, the first side plate 3 and the second side plate 4 are relatively difficult to move in the assembled state, so that the folding container 1 is unlikely to be twisted.

In particular, in the present embodiment, the first convex portion 51 is formed at the upper end portion (near) of the first side plate 3, and the second convex portion 52 is formed at the upper end portion (near) of the second side plate 4. Has been done. Since the lower end of the first side plate 3 and the second side plate 4 is rotatably connected to the bottom plate 2, the upper end portion rotates and moves around the lower end portion, and the first side plate 3 The upper end of the second side plate 4 is easy to move. The first convex portion 51 is formed on the upper end portion of the first side plate 3, and the second convex portion 52 is formed on the upper end portion of the second side plate 4, so that the folding container 1 is effectively twisted. Can be suppressed.

Further, since the first convex portion 51 and the second convex portion 52 are formed in the folding container 1, the first convex portion 51 and the second facing portion 40 collide with each other when the folding container 1 is assembled. The second convex portion 52 and the first facing portion 30 are likely to collide with each other. Therefore, in the present embodiment, since the first convex portion 51 has the first inclined portion 511 and the second convex portion 52 has the second inclined portion 521, the first inclined portion 511 Compared with the case where the second inclined portion 521 is not provided, the first convex portion 51 and the second opposing portion 40 are less likely to collide with each other, and the second convex portion 52 and the first opposing portion 30 collide with each other. Hateful. This facilitates the assembly work of the folding container 1. Further, since the second facing portion 40 is guided by the first inclined portion 511 and the first facing portion 30 is guided by the second inclined portion 521, the folding container 1 can be easily assembled.

Next, a modified example of the above-described embodiment will be described.

The bottom plate 2 (bottom 21) may have a square shape in a plan view. Further, the bottom plate 2 (bottom portion 21) does not necessarily have to have a rectangular shape in a plan view.

Ribs may not be formed on the lower surface of the bottom portion 21. The bottom portion 21 does not have to be formed in a mesh shape. That is, the bottom portion 21 does not have to have a through hole penetrating up and down.

The shape of the first rising portion 22 is not particularly limited. The first rising portion 22 may be formed in a mesh shape. That is, the first rising portion 22 may have through holes that penetrate vertically. Further, the first rising portion 22 may have an arbitrary configuration and may not be provided. If the first rising portion 22 is not provided, the first connecting portion 23 is formed on the bottom portion 21.

The shape of the second rising portion 24 is not particularly limited. The second rising portion 24 does not have to be formed in a mesh shape. That is, the second rising portion 24 does not have to have a through hole penetrating to the left and right. Further, the second rising portion 24 may have an arbitrary configuration and may not be provided. If the second rising portion 24 is not provided, a second connecting portion 25 is formed on the bottom portion 21.

The first side plate 3 may or may not be rectangular when viewed in the front-rear direction. The rib 31 may not be formed on the first side plate 3. The first side plate 3 does not have to be formed in a mesh shape. That is, the first side plate 3 does not have to have a through hole penetrating back and forth. The shape and size of the handle opening 32 formed on the first side plate 3 and the position on the first side plate 3 are not limited. Further, the handle opening 32 may not be formed on the first side plate 3.

The second side plate 4 may have a square shape when viewed in the left-right direction, or may not necessarily have a rectangular shape. The rib 41 may not be formed on the second side plate 4. The second side plate 4 does not have to be formed in a mesh shape. That is, the second side plate 4 does not have to have a through hole penetrating to the left and right. The shape and size of the handle opening 42 formed on the second side plate 4 and the position on the second side plate 4 are not limited. Further, the handle opening 42 may not be formed on the second side plate 4.

The first convex portion 51 may be located above the second convex portion 52. The first convex portion 51 and the second convex portion 52 do not have to be formed at positions shifted vertically. That is, the first convex portion 51 and the second convex portion 52 may be formed at the same position in the vertical direction. In this case, it is preferable that the protruding height of the first convex portion 51 and the protruding height of the second convex portion 52 are each half or less of the predetermined clearance 50.

Further, the first convex portion 51 and the second convex portion 52 may be formed at the same position in the vertical direction and at different positions in the plan view. For example, of the first facing portion 30 and the second facing portion 40 facing each other, the first convex portion 51 is formed on the outer (or inner) portion of the side wall 5 of the first facing portion 30 in the thickness direction. The second convex portion 52 may be formed on the inner (or outer) portion of the second opposing portion 40. In this case, it is preferable that the protruding height of the first convex portion 51 and the protruding height of the second convex portion 52 are the same as the predetermined clearance 50, respectively.

The gap 11 may not be formed between the first convex portion 51 and the second convex portion 52. As a result, although the assembling work becomes difficult, the folding container 1 is less likely to be twisted in the assembled state.

The first convex portion 51 does not have to be formed at the upper end portion (near) of the first side plate 3. That is, the first convex portion 51 may be formed below the upper end portion of the first side plate 3 (intermediate portion in the vertical direction). Similarly, the second convex portion 52 does not have to be formed at the upper end portion (near) of the second side plate 4. That is, the second convex portion 52 may be formed below the upper end portion of the second side plate 4 (intermediate portion in the vertical direction).

Further, the first convex portion 51 may be formed at the upper end portion of the first side plate 3 and the portion below the upper end portion, respectively. Similarly, the second convex portion 52 may be formed at the upper end portion of the second side plate 4 and the portion below the upper end portion, respectively. The position and number of the first convex portion 51 and the second convex portion 52 formed in the vertical direction are not limited.

In the above embodiment, the protruding end of the first convex portion 51 is flat, and the second opposed portion 40 is also flat, and these are in surface contact in the assembled state. On the other hand, the protruding end of the first convex portion 51 may be a protrusion, and the protrusion and the second facing portion 40 may be in point contact with each other. Alternatively, the protruding end of the first convex portion 51 may be a ridge, and the ridge and the second facing portion 40 may be in line contact with each other. Similarly, the protruding end of the second convex portion 52 may be a protrusion, and the protrusion and the first facing portion 30 may be in point contact with each other. Alternatively, the protruding end of the second convex portion 52 may be a ridge, and the ridge and the first facing portion 30 may be in line contact with each other.

The inclined surface, which is the surface of the first inclined portion 511, is a flat surface in the above embodiment, but may be a curved surface (curved surface). Further, the first inclined portion 511 may have an arbitrary configuration and may not be provided.

The inclined surface, which is the surface of the second inclined portion 521, is a flat surface in the above embodiment, but may be a curved surface (curved surface). Further, the second inclined portion 521 may have an arbitrary configuration and may not be provided.

Further, only the first inclined portion 511 may be provided and the second inclined portion 521 may not be provided, or only the second inclined portion 521 may be provided and the first inclined portion 511 may not be provided. Both the first inclined portion 511 and the second inclined portion 521 may not be provided.

The lateral position in which the low rib 7 is formed in the space 60 is not particularly limited. The vertical length of the low rib 7 is not particularly limited. The low rib 7 may have a different protrusion height depending on the portion, or may have a uniform protrusion height. The protruding height at the lower end of the low rib 7 may be one-third or less of the protruding height from the outer surface of the side wall 5 of the rib wall 6. The protruding height of the low rib 7 is not particularly limited as long as it is lower than the protruding height from the outer surface of the side wall 5 of the rib wall 6.

The tip surface (the portion pointed to by reference numeral 7 in FIG. 11B) at the lower end of the low rib 7 may be a curved surface having the same radius of curvature for the low rib 7 as the inclined surface 70 (however, this is an inside corner) of the side surface 71. ..

The radius of curvature for the lower rib 7 may be the same as the radius of curvature for the rib wall 6.

The lower rib 7 is preferably connected to the lower lateral rib, but may not be particularly connected to the lower lateral rib. That is, the low rib 7 may not be connected to the lower lateral rib but may be connected to the upper lateral rib, or may not be connected to both the lower and upper lateral ribs. A plurality of low ribs 7 may be formed in one space 60.

The lateral ribs (eg, the lower lateral rib 412 in FIG. 8B or the lower lateral rib 312 in FIG. 9B) may have an upper surface facing the space 60 tilted downward toward the lower rib 7. Further, in this case, openings similar to the openings 49 may be formed on both sides of the low rib 7.

The inclined surface 70 may be formed not by a curved surface but by a plane forming an angle of less than 90 degrees with the outer surface of the side wall.

Further, the washing water remaining in the space 60 is an example, and other liquids may remain in the space 60, and the type of the liquid is not limited.

Further, as shown in FIG. 12A, the vertical length of the low rib 7 is the same as the vertical length of the space 60, and the low rib 7 is higher toward the lower side of the lower rib 7. It may be tilted so that it becomes.

Further, as shown in FIG. 12B, the vertical length of the low rib 7 is the same as the vertical length of the space 60, and the low rib 7 has a protruding height of the side wall 5 of the rib wall 6 in the vertical direction. It may be uniform at half the height of protrusion from the outer surface of.

At the connecting portion of the vertical rib and the horizontal rib forming the rib wall 6, the inner surface of the vertical rib and the inner surface of the horizontal rib may have a radius of curvature equal to or greater than the radius of curvature for the low rib 7.

Further, as shown in FIG. 15, a step may be formed between the first facing portion 30 and the second facing portion 40. In the portions of the first facing portion 30 and the second facing portion 40 on the side close to the second side plate 4 facing each other, a first convex portion 51 is formed in the first facing portion 30. In the portions of the first facing portion 30 and the second facing portion 40 on the side far from the second side plate 4 facing each other, a second convex portion 52 is formed on the second facing portion 40. The first convex portion 51 and the second convex portion 52 are formed at the same position in the vertical direction. Also in this case, the first side plate 3 and the second side plate 4 are relatively difficult to move, and the folding container 1 is less likely to be twisted. Further, the first convex portion 51 has a first inclined portion 511, and the second convex portion 52 has a second inclined portion 521. As a result, the first convex portion 51 and the second opposing portion 40 are less likely to collide, and the second convex portion 52 and the first opposing portion 30 are less likely to collide. Further, the second facing portion 40 is guided by the first inclined portion 511, and the first facing portion 30 is guided by the second inclined portion 521. This facilitates the assembly work of the folding container 1.

Further, as shown in FIGS. 16A to 16C, a low convex portion 8 may be formed instead of the low rib 7. In the low convex portion 8, a part of the side wall 5 in the space 60 projects outward, and the low convex portion 8 projects at a protruding height lower than the protruding height from the outer surface of the side wall 5 of the rib wall 6. The end continuous with the outer surface of the side wall 5 of the side surface 81 of the lower convex portion 8 is a curved surface curved with a radius of curvature for the lower convex portion 8 in the continuous direction to the outer surface of the side wall 5, or the side wall. The inclined surface 80 is composed of a plane forming an angle of less than 90 degrees with the outer surface of the above. In the above embodiment and each modification, the low rib 7, the inclined surface 70 and the side surface 71 can be replaced with the low convex portion 8, the inclined surface 80 and the side surface 81, respectively.

As is clear from the above-described embodiment and its modification, the folding container 1 of the first aspect includes a rectangular bottom plate 2, a pair of first side plates 3, and a pair of second side plates 4. To prepare. The first side plate 3 is rotatably attached to a pair of opposite sides of the bottom plate 2. The second side plate 4 is rotatably attached to each of the other pair of opposite sides of the bottom plate 2. The folding container 1 has a folded state in which a pair of first side plates 3 are laid down on a bottom plate 2 and a pair of second side plates 4 are laid down, and a pair of second side plates 4 are erected after standing up. It is possible to selectively configure the assembled state in which the side plate 3 of 1 is erected and the side wall 5 having a rectangular shape in a plan view is formed by the pair of the first side plates 3 and the pair of the second side plates 4. .. The bottom plate 2 has a second side plate support end portion 26 at an end portion of a portion located below the second side plate 4 in the assembled state. The second side plate support end portion 26 includes at least two vertical ribs 201 (2011, 2012) of the plurality of vertical ribs 201 formed on the outer surface of the bottom plate 2 extending in the vertical direction. The second side plate support end portion 26 has a horizontal rib 28 connecting the vertical ribs 201 included in the second side plate support end portion 26. The lateral rib 28 is inclined so as to be positioned downward toward the first side plate 3 in the assembled state.

In the first aspect, the lateral rib 28 is formed on the second side plate support end portion 26, so that the rigidity and strength of the second side plate support end portion 26 are improved. Further, by inclining the lateral rib 28 so as to be positioned downward toward the first side plate 3, the load applied to the second side plate support end portion 26 is compared with the case where the lateral rib 28 is horizontal. Can be transmitted to the inside of the bottom plate 2 more, and the bending of the bottom plate 2 can be easily suppressed. As a result, the rigidity and strength of the bottom plate 2 can be improved.

The second aspect can be realized in combination with the first aspect. In the second aspect, the bottom plate 2 has a second side plate support intermediate portion 27. The second side plate support intermediate portion 27 is an intermediate portion of a portion located below the second side plate 4 in the assembled state, and is located between both second side plate support end portions 26, and has a plurality of vertical ribs 201. Including. The second side plate support intermediate portion 27 has an intermediate portion lateral rib 271. The intermediate portion horizontal rib 271 is continuous with the horizontal rib 28 included in the second side plate support end portion 26, and connects the vertical rib 201 included in the second side plate support intermediate portion 27.

In the second aspect, the rigidity and strength of the second side plate support intermediate portion 27 are further improved by the intermediate portion lateral rib 271. Further, since the intermediate portion horizontal rib 271 is continuous with the horizontal rib 28, the vertical rib 201 to which the horizontal rib 28 and the intermediate portion horizontal rib 271 are connected is less likely to be damaged.

The third aspect can be realized in combination with the first or second aspect. In the third aspect, the second side plate support end portion 26 has a bulging portion 261 that bulges upward at the upper end portion.

In the third aspect, when the folded containers 1 in the assembled state are stacked, the load applied to the second side plate supporting end portion 26 of the lower folding container 1 is received by the bulging portion 261 and further toward the inside of the bottom portion 21. It can be transmitted, and the bending of the bottom portion 21 can be easily suppressed.

1 Folding container 2 Bottom plate 201 Vertical rib 26 Second side plate support end 261 Swelling part 27 Second side plate support intermediate part 271 Intermediate part Horizontal rib 28 Horizontal rib 3 First side plate 4 Second side plate 5 Side wall

Claims (3)

A rectangular bottom plate, a pair of first side plates rotatably attached to each of the pair of opposite sides of the bottom plate, and a pair of rotatably attached to each other pair of opposite sides of the bottom plate. A second side plate is provided, and a folded state in which the pair of the first side plates are laid down on the bottom plate and the pair of the second side plates are laid down, and a pair of the second side plates are erected. Later, the pair of the first side plates is erected, and the assembled state in which the pair of the first side plates and the pair of the second side plates form a side wall having a rectangular shape in a plan view is selectively configured. A possible folding container,
The bottom plate is formed at the end of a portion of the second side plate in the assembled state, at least two of the vertical ribs extending in the vertical direction formed on the outer surface of the bottom plate. Has a second side plate support end that includes ribs,
The second side plate support end portion has a horizontal rib connecting the vertical ribs included in the second side plate support end portion, and the horizontal ribs move toward the first side plate in the assembled state. A folding container that is tilted to be located below. The bottom plate is an intermediate portion of a portion located below the second side plate in the assembled state, and is a second side plate support intermediate including a plurality of the vertical ribs between both the second side plate support ends. Has a part
The second side plate support intermediate portion has an intermediate portion horizontal rib that is continuous with the lateral ribs included in the second side plate support end portion and connects the vertical ribs included in the second side plate support intermediate portion. The folding container according to claim 1. The folding container according to claim 1 or 2, wherein the second side plate support end portion has a bulging portion that bulges upward at the upper end portion.

Images