JP3513476B2 - Folding container - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding container.

[0002]

2. Description of the Related Art Conventionally, a pair of first side plates rotatably attached to a pair of opposite sides of a rectangular bottom plate and a pair of rotatably attached to another pair of opposite sides. The second side plate is folded with the pair of second side plates laid down and the pair of first side plates is laid down, and the pair of second side plates is erected after the pair of first side plates is erected. A folding container that can be assembled into a box shape is disclosed in, for example, Japanese Patent Laid-Open No. 9-1.
It is known from Japanese Patent No. 65033. In addition, although it is not a foldable container, it has been conventionally known that a rotatable lid is kept upright by engaging an engaging protrusion provided on the lid with an engaging hole provided in the case body. 57
No. 180652 publication is known.

When assembling the conventional folding container described above, the pair of first side plates are first erected and then the pair of second side plates are erected as described above.
During this assembling operation, hold the pair of first side plates with both hands to rotate them upright, and then release the first side plate and hold the pair of second side plates in both hands to rotate. When standing up, the first side plate that has released the hand falls inward and the second side plate
It becomes difficult to stand up the side plates of the, so that there is a problem in workability of assembly.

Further, when the folding container holds the stored items with both hands, the folding container holds both short sides with both hands in a state where the long side is positioned parallel to the chest, but the stored items are heavy. There is a problem that the bottom plate of the folding container is elastically deformed downward at the central portion in the long side direction.

Further, the folding container may be placed on a conveyer such as a roller conveyer when it is moved in a collection place or a factory in a state where it is empty or contains stored items. In this case, the bottom plate is In the case of a rectangle, it is common to transport the folding container in a direction parallel to the long side, so that the edge of the short side of the bottom plate becomes the leading edge of the moving direction when moving on the conveyor, and thus the short side of the bottom plate is moved. There is a problem that the edge of the side is likely to collide with other objects, the reinforcing ribs provided on the edge of the short side of the bottom plate are easily damaged, and it is difficult to get into the seam when the direction of the traveling direction of the conveyor is changed.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and in a folding container, the first side plate of the first side plate is first erected in the state where the first side plate is first erected during assembly. It is an object of the present invention to provide a folding container that can be easily assembled while maintaining its self-standing property and that can improve the strength of the bottom plate with a simple structure.

[0007]

To achieve the above object, the folding container according to the present invention comprises a pair of first side plates 2 rotatably attached to a pair of opposite sides of a rectangular bottom plate 1, respectively. Folding a pair of second side plates 3 rotatably attached to the other pair of opposing sides with the pair of second side plates 3 lying down and the pair of first side plates 2 lying down. A folding container in which a pair of first side plates 2 are first erected and then a pair of second side plates 3 are erected to assemble into a box shape, which is a self-standing state in which the first side plates 2 are erected first. Smell provided with self-supporting holding means 4 for holding
Attach the lower end of the first side plate 2 to the bottom plate 1 in a freely rotatable manner.
The first side plate 2 in the standing state on the side end of the bottom plate 1
The rising portion 5 facing the lower end portion of the outer surface is provided to
A protrusion 6 is provided on the lower end of the outer surface of the side plate 2 so as to extend outward.
On the surface of the rising portion 5 facing the protrusion 6.
Tilts so that it goes away from the first side plate 2 toward
The inclined surface portion 7 is provided, and by the inclined surface portion 7 and the protrusion 6,
Constituting the self-supporting means 4 to raise the first side plate 2 first
In this state, the projection 6 is brought into pressure contact with the inclined surface portion 7 and is characterized in that. With such a configuration, when the first side plates 2 facing each other during assembly are first erected, the first side plates 2 previously erected by the self-supporting holding means 4 can be self-supporting. , The first side plate 2
When the second side plate 3 facing the first side plate 2 is lifted after the user has raised it, the first side plate 2
The second side plate 3 can be erected without falling down and without being disturbed by the first side plate 2. Also,
When standing, the first side plates 2 facing each other were first erected.
In this case, the outer surface of the first side plate 2 is rotated along with the rotation of the first side plate 2.
The projecting portion 6 projecting outward at the lower end of the
While descending along the inclined surface portion 7 from above, the inclined surface portion gradually
It is possible to make the first side plate 2 stand up by pressing it strongly against 7.
It is something.

[0008]

Further, a rectangular synthetic resin bottom plate 1
A large number of reinforcing ribs 8 are integrally formed on the lower surface of the, and among the large number of reinforcing ribs 8, at least short side edge ribs 9 along opposing short sides and a long side located at the central portion in the short side direction. A hollow formed by gas injection in which a long side central rib 10 parallel to the side and having both ends continuous with both short side lateral ribs 9 is wider than the other reinforcing ribs 8 and the inside is hollow. In addition to the ribs 11, both ends of the hollow portion 12 of the long-side center rib 10 are communicated with the hollow portion 12 of the short-side edge rib 9, and the short-side edge rib 9 is formed.
It is preferable that a corner portion formed by the outer side surface 9a and the lower end surface 9b be a chamfered portion 9c.

With this structure, when the short side is held with both hands while the long side is positioned parallel to the chest while the stored item is stored in the folding container A, the stored item is Central rib 1 with a wide side and a hollow interior, even if heavy
It is possible to prevent the bottom plate 1 of the folding container A from being reinforced in the long side direction due to the presence of 0 and being deformed so that the central portion of the long side is downward. Further, when the folding container A is placed on a conveyor such as a roller conveyor in an empty or stored state in a collection place or a factory, the folding container A conveys the folding container A in a direction parallel to the long side. In this case, the short side edge rib 9 at the edge of the short side, which is the most distal end in the moving direction of the bottom plate 1, may collide with another object. Even in such a case, the wide short side edge rib 9 is also present. It is hard to break because of its high strength. Moreover, although the long side central rib 10 and the short side edge rib 9 are wide, the inside is hollow, so it is light and easy to handle, and the amount of synthetic resin used is small. Therefore, the strength of the wide long side center rib 10 and the wide side ribs 9 is also strong. Also, the long side center rib 10
Since both ends of the hollow portion 12 are communicated with the hollow portion 12 of the short side ribs 9, when the bottom plate 1 is formed by injection molding synthetic resin from the gate portion, gas is blown from the gate portion. It is possible to easily form the hollow portion 12 in the long side center rib 10 and also to form the hollow portion 12 in each of the short side edge ribs 9 continuous to both ends of the long side center rib 10. Further, since the corner portion formed by the outer side surface 9a and the lower end surface 9b of the short side rib 9 serves as a chamfered portion 9c, the foldable container A is emptied or stored in a collection place or a factory. When the folding container A is conveyed in a direction parallel to the long side when the container is stored on a conveyor such as a roller conveyor and moved, the outer side surface 9a and the lower end surface 9b of the short side rib 9 are formed. Even if another object collides with the corner portion, the chamfered portion 9c allows the other object that has collided to be overcome, and damage to the short side ribs 9 can be prevented.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the accompanying drawings.

The folding container A of the present invention comprises a pair of first side plates 2 rotatably attached to a pair of opposing sides of a rectangular bottom plate 1 made of synthetic resin, and another pair of opposing sides. And a pair of second side plates 3 rotatably attached to each other. The pair of second side plates 3 are folded and the pair of first side plates 2 are folded and folded to form a pair of first side plates 2. The first side plate 2 is erected and then the pair of second side plates 3 is erected to assemble into a box shape.

The folding container A is of a type in which the bottom plate 1 has a rectangular shape and becomes a rectangular shape in plan view when folded and a rectangular box shape in plan view when assembled in a box shape.
There is a type in which the bottom plate 1 has a square shape and becomes a square in a plan view when folded, and a square box in a plan view when assembled in a box shape. In the present invention, any of the above-mentioned folding containers A can be used. However, the attached drawings show an embodiment in which the bottom plate 1 has a rectangular shape. Hereinafter, the case where the bottom plate 1 is rectangular will be described as an example. In the following description, the first side plate 2 will be described by taking the long side side plate 2a as an example, and the second side plate 3 by taking the short side side plate 3a as an example.

A long-side side plate 2a, which is a first side plate 2, is rotatably attached to the opposite long-side sides of a rectangular bottom plate 1 made of synthetic resin, and the bottom plate 1 faces the opposite side. A short-side side plate 3a, which is the second side plate 3, is rotatably attached to the short-side side.

Both the long side side plate 2a and the short side side plate 3a are rotatably attached at their lower ends to the bearing portions 16 and 17 provided on the bottom plate 1 by the horizontal shaft portions 15a and 15b. In the embodiment shown in FIGS. 1 and 2, the horizontal shaft portion 15a provided on the first side plate 2a is rotatably supported by the horizontal elongated hole 16a constituting the bearing portion 16.

Here, the horizontal shaft portion 15b of the side plate 3a on the short side.
The bearing portion 16 that pivotally supports the horizontal shaft portion 15a of the side plate 2a on the longer side than the bearing portion 17 that pivotally supports
In folding, the side plate 3a on the short side is first folded and stacked on the bottom plate 1, and then the side plate 2a on the long side is folded and stacked on the side plate 3a on the short side.

A first side plate 2 is provided at the side end of the bottom plate 1 on the short side.
The rising portion 5 is provided so as to face the lower end of the outer surface of the side plate 2a on the long side in a state where the side plate 2a on the long side is raised. Further, a projection 6 is provided at the lower end of the outer surface of the first side plate 2 so as to project outwardly in a standing state. The surface of the rising portion 5 facing the protrusion 6 is provided with an inclined surface portion 7 which is inclined so as to be away from the side plate 2a on the long side as it goes upward. In the embodiment shown in the accompanying drawings, a concave portion is provided on the inner surface of the rising portion 5, and the deeper side surface of the concave portion facing the side plate 2a on the long side of the concave portion becomes more distant from the side plate 2a on the long side in the upright state. Although an example in which the inclined surface portion 7 is inclined so as to be oriented in the direction is shown, a protrusion is provided on the inner surface of the rising portion 5, and the surface facing the side plate 2a on the long side of the protrusion is upward. It may be an inclined surface portion 7 that is inclined so as to be away from the side plate 2a on the long side in the upright state as it goes to.

When the side plate 2a on the long side is rotated in the upright direction, the protrusion 6 first comes close to the upper end of the inclined surface portion 7, and the side plate 2a on the longer side is further rotated to gradually rotate. The projecting portion 6 pushes downward from above the inclined surface portion 7, the projecting portion 6 presses against the lower portion of the inclined surface portion 7 in the upright state, and the long side side plate 2a stands up and stands up. Is retained. That is, in the present embodiment, the inclined surface portion 7 and the protrusion 6 constitute the self-supporting holding means 4 for holding the side plate 2a on the long side, which is the first side plate 2, in a standing state.

In this case, since the bearing portion 16 is constituted by the laterally long hole 16a, when the projection 6 is pressed from above the inclined surface portion 7 along with the rotation of the side plate 2a on the long side, the long side is long. The lateral shaft portion 15a of the side plate 2a on the side moves in the direction of the arrow in FIG. 6 through the laterally elongated hole 16a, and the projection 6 is pressed against the lower portion of the inclined surface portion 7 in the upright state. The projecting portion 6 can be smoothly introduced from the upper end of 7, and when the projecting portion 6 is introduced into the inclined surface portion 7, the rising portion 5 provided with the inclined surface portion 7 is deformed outward, or The lower end portion of the side plate 2a is prevented from being deformed inward, and even when the protrusion 6 is pressed against the lower portion of the inclined surface portion 7 in the upright state, the inclined surface portion 7, the long side Side plate 2a
Can be prevented from deforming.

Of course, if the bending deformation is allowed to some extent, the bearing portion 16 may be formed of a round hole instead of forming the bearing portion 16 of the laterally elongated hole 16a as described above.

Therefore, in the folding container A as described above, the pair of second side plates 3 which are the pair of short side plates 3a are rotated first to lie down on the upper surface of the bottom plate 1 and then the pair of second plates. 4 and 8 by rotating the pair of long side side plates 2a, which are the first side plates 2, from the rear side and tilting them over the short side side plates 3a.
As shown in, it can be folded compactly.

In order to assemble the folded folding container A into a box shape, first, a pair of long side side plates 2a are formed.
Is held by both hands and rotated to stand up, then both hands are separated from the pair of long side side plates 2a, and the pair of short side side plates 3a are held by both hands and rotated to stand up. .

Here, in the above-described assembly operation, after holding the pair of long side side plates 2a with both hands and rotating them to stand up, the hands are separated from the pair of long side side plates 2a. When the side plate 3a on the side of the side is held by rotating it to stand up, the side plate 2a on the side of the long side, which is released, falls down inward, and the side plate 2a on the side of the long side interferes with the pair of short side sides. Although it may be difficult to perform the standing operation of the side plates 3a of the above, in the present invention, as described above, the pair of long side side plates 2a are rotated and erected to project to the lower portion of the inclined surface portion 7. Since the side plate 2a on the long side is self-standing in the upright state by the pressing of the portion 6 (see FIG. 5), the side plate 2a on the long side after the standing operation of the side plate 2a on the long side.
The side plate 2a on the long side does not fall inward even if both hands are separated from each other, and as a result, the side plate 2a on the long side is obstructed when the side plate 3a on the short side is held upright with both hands. Therefore, the folding container A can be easily erected and the assembling operation of the folding container A can be easily performed.

As described above, the pair of long side side plates 2a is first formed.
And then, with the pair of short-side side plates 3a standing upright, the both ends of the outer surface of the short-side side plate 3a are directed from both ends of the long-side side plate 2a toward the inner surface side. The side plates 3 on the short side are in contact with the opposite surfaces of the protruding side end protrusions 30 respectively.
a is prevented from falling outward. Also in this case,
It is prevented that the end portion of the inner surface of the side plate 2a on the long side contacts the end surface portion of the side plate 3a on the short side and the side plate 2a on the long side falls inward. In addition, the side plate 2a on the long side has the rising portion 5
This prevents falling to the outside. As described above, in the state where the pair of long side side plates 2a and the pair of short side side plates 3a are erected, engaged parts (not shown) provided at the ends of the long side side plates 2a. A pair of long side side plates 2a and a pair of short side side plates 3a are detachably engaged with an engaging portion (not shown) provided at an end of the short side side plate 3a. It is joined to maintain a box shape. The engaged portion,
As the engaging portion, conventionally known engaging portions and engaging portions for joining end portions of side plates to each other in a standing state in this type of folding container can be adopted.

[0025]

[0026]

By the way, the lower surface of the bottom plate 1 made of a synthetic resin having a rectangular shape and forms a plurality of reinforcing ribs 8, as shown in FIG. 9 for reinforcement. A large number of the reinforcing ribs 8 are formed so as to cross each other vertically and horizontally. Here, among a number of reinforcing ribs 8 formed on the lower surface of the bottom plate 1, short side edge ribs 9 along opposite short sides and a short side edge rib 9 located in the central portion in the short side direction and parallel to the long side and The long side center rib 10 having both short side edges and the short side ribs 9 continuous with each other has a rib pitch width which is about twice or more than the vertical and horizontal reinforcing ribs 8 as compared with other reinforcing ribs 8. In addition, the hollow rib 11 is formed by gas injection having a hollow inside. Both ends of the hollow portion 12 of the long side central rib 10 are connected to the short side edge ribs 9.
It is communicated with the hollow portion 12 of the. Further, a central short side rib 21 parallel to the short side is provided in the central portion between the short side edge ribs 9 at both ends of the bottom plate 1, and the central short side rib 21 and the short side edge rib 9 are provided. Intermediate short side rib 29 parallel to the short side between
And both ends of the intermediate short side ribs 29 are continuous with the intermediate long side ribs 22, respectively.
The middle part of 2 is continuous to both ends of the central short side rib 21. Then, the central short side rib 21 and the intermediate short side rib 2
9. The intermediate long side rib 22 is also a hollow rib 11 which is wider than the other reinforcing ribs 8 and has a hollow interior formed by gas injection.

Here, the hollow portion 1 of the central short side rib 21.
2 and the hollow portion 12 of the intermediate short side rib 29 is the long side center rib 10.
Of the intermediate short side rib 29.
The hollow portion 12 and the hollow portion 12 of the intermediate long side rib 22 communicate with each other, and the hollow portion 12 of the intermediate long side rib 22 communicates with the hollow portion 12 of the central short side rib 21.

A gate mark 13 is formed in the center of the lower surface of the long side center rib 10, and in the embodiment shown in FIG. 9 , both ends of both middle short side ribs 29 and both middle long side ribs are formed. Another gate mark 13 'is also provided on the lower surface of the corner portion where the both ends of 22 are continuous.

Further, as shown in FIG. 10 , the short side ribs 9 are formed.
A corner portion formed by the outer side surface 9a and the lower end surface 9b is a chamfered portion 9c. The long-side center rib 10 and the short-side side rib 9 are portions corresponding to the side edges facing each other in the traveling direction of the conveyor, and are wider than the center short-side rib 21, the intermediate short-side rib 29, and the intermediate long-side rib 22. It is wide.

Therefore, in forming the bottom plate 1 having the hollow portion 12 in a part of the reinforcing rib as described above, there is a case where the bottom plate 1 is formed by gas injection, but in the case of this embodiment, the molding die is used. Above gate trace 1
A gate for injection is provided at a portion corresponding to 3, 13 ', and synthetic resin is injected into the cavity of the mold from this gate, and then gas is blown from the gate, so that the length in the cavity of the mold is increased. Side center rib 10, both short side ribs 9, center short side rib 21, both middle short side ribs 29, both middle long side ribs 2.
Since the part forming 2 is wide, the gas blown from the gate flows into the wide part in the cavity, and the inside of the part widened by the gas pressure is hollow part 1.
2, the long side central rib 10 in which gas is press-fitted therein and the hollow portion 12 is formed, both short side side edge ribs 9, central short side ribs 21, both middle short side ribs 29, both middle lengths. The side rib 22 can be formed.

Since the bottom plate 1 formed in this manner has the long side central rib 10 having a hollow portion 12 inside, which is wide across both short sides in parallel with the long side at the center of the short side, The folding container A that is strong against bending in the direction parallel to the long side can be provided. In particular, the foldable container A holds both of its short sides with both hands while the stored items are stored with its long sides parallel to the chest. In this case, even if the stored items are heavy, they are wide. Folding container A due to the presence of central rib 10 with a hollow inside
The bottom plate is reinforced in the long side direction and can be prevented from being deformed so that the central portion on the long side is downward.

When the foldable container A is placed on a conveyor such as a roller conveyor in an empty or stored state in a collection place or a factory, the foldable container A is conveyed in a direction parallel to the long side. However, in this case, the short side ribs 9 of the short side edge, which is the leading edge in the moving direction, are likely to collide with other objects, and this portion of the bottom plate 1 is easily damaged. However, in the present invention, since the short side ribs 9 are wide as described above, they have high strength and are not easily damaged. Moreover, since the long side central rib 10 and the short side edge rib 9 are wide, the inside is hollow,
Prevents deformation of the shoulder surface due to sink marks due to heat shrinkage immediately after molding, is not only light and easy to handle, it also uses a small amount of synthetic resin, and since it is hollow, it has the same structure as a pipe with a wide long side central rib 10 and short ribs. The strength of the side edge rib 9 is also strong. Further, since the wide long-side center rib 10, the center short-side rib 21, the middle short-side rib 29, and the middle long-side rib 22 are connected to each other, the strength of the bottom plate 1 is also improved by this. .

Further, a chamfered portion 9c in which a corner portion formed by the outer side surface 9a and the lower end surface 9b of the short side rib 9 is chamfered.
Therefore, the short side rib 9 is being conveyed by the conveyor.
Even if another object collides with the corner portion formed by the outer side surface 9a and the lower end surface 9b, the chamfered portion 9c can get over the other object and prevent the short side edge rib 9 from being damaged. Is something that can be done.

[0035]

As described above, according to the first aspect of the present invention, a pair of first side plates rotatably attached to a pair of opposing sides of a rectangular bottom plate, respectively. A pair of second side plates rotatably attached to the other pair of facing sides are folded together with the pair of second side plates laid down and the pair of first side plates laid down to form a pair of first side plates. 1. A folding container in which a pair of second side plates is raised after the first side plate is first raised to assemble into a box shape, and is a self-standing container for maintaining a self-standing state in a state where the first side plate is first raised. Since the holding means is provided, when the first side plates facing each other during assembly are first erected, the first side plates erected first by the self-supporting holding means can be self-supported.
After the side plate of the first side plate is erected, the first side plate is not collapsed when the second side plate opposite to the first side plate is lifted by grasping the second side plate with the hand, and the second side plate is not disturbed by the second side plate. The side plates can be erected and the folding container can be assembled by a simple operation. Moreover, the first on the bottom plate
Attach the lower end of the side plate of the
In the upright position, the upright position is opposite to the lower end of the outer surface of the first side plate.
Providing a raised portion, the outer side of the outer surface of the first side plate is located outside
Projecting toward the
The higher it goes to the facing surface, the farther away it is from the first side plate.
Is provided so that the inclined surface portion and the protrusion are provided.
The self-supporting means is constituted by the first side plate to stand up first.
Since the protrusion is pressed against the inclined surface in the
When standing upright, the first side plates facing each other are first raised.
The lower end of the outer surface of the first side plate as the first side plate rotates.
The projection that protrudes outward from the slope is inclined from above the inclined surface
While descending along the surface, it gradually comes into pressure contact with the inclined surface and
1 side plate can be erected, sloped and protruding
The self-supporting means can be constructed with a simple structure.

[0036]

Further, in the second aspect of the invention, in addition to the effect of the invention according to the first aspect, formed integrally with a number of reinforcing ribs on the lower surface portion of the synthetic resin base plate having a rectangular shape Among the many reinforcing ribs, at least the short side edge ribs along the opposite short sides, and the short side edge ribs that are located at the center in the short side direction and are parallel to the long side and both ends are both short side edge ribs. The continuous long-side center rib is a hollow rib that is wider than other reinforcing ribs and has a hollow interior that is formed by gas injection, and both ends of the hollow portion of the long-side center rib are on the short side. Since it is connected to the hollow part of the edge rib, if the long side is parallel to the chest and the short sides are held with both hands while the stored items are stored in the folding container, the stored items will be heavy. However, due to the presence of the central rib on the long side, which is wide and hollow inside, The plate can be reinforced in the long side direction to prevent it from deforming so that the central part on the long side is down, and the folding container is empty or stores items in the collection place or factory. In this state, when the folding container is placed on a conveyor such as a roller conveyor and conveyed in a direction parallel to the long side, the short side edge rib of the short side edge, which is the leading edge of the bottom plate in the moving direction, collides with another object. However, the wide side ribs on the short side have high strength and are not easily damaged. Also, even though the center rib on the long side and the rib on the short side are wide, the inside is hollow, so immediately after molding. Prevents bottom deformation due to sink marks due to heat shrinkage, is light and easy to handle, uses a small amount of synthetic resin, and is hollow, so it has the same structure as a pipe and has wide long side ribs and short side ribs. Is also strong. Further, since both ends of the hollow portion of the long side center rib are communicated with the hollow portion of the short side edge rib, when the synthetic resin is injection-molded from the gate portion to form the bottom plate, the gas is discharged from the gate portion. It is possible to easily form a hollow portion in the long side center rib by blowing and also to form a hollow portion in each short side edge rib continuous to both ends of the long side center rib. The edge rib and the long side center rib can be easily formed. In addition, since the corner part formed by the outer surface and the lower end surface of the short side rib is a wide and chamfered chamfer, the folding container can be used to store empty or stored items in a collection place or factory. When carrying a folded container in a direction parallel to the long side when it is placed on a conveyor such as a roller conveyor and moved in such a state, another object is placed at the corner part formed by the outer surface of the short side rib and the lower end surface. Even if a collision occurs, the other chamfered parts can be overcome by the presence of the wide chamfered portion, and the short side ribs can be prevented from being damaged with a simple structure.

[Brief description of drawings]

FIG. 1 is a perspective view showing a pivotal support portion of a first side plate to a bottom plate of a folding container according to the present invention in a state in which the first side plate is tilted.

FIG. 2 is an exploded perspective view showing pivotal support portions of the first side plate and the second side plate of the above.

FIG. 3 is a perspective view showing a state in which the above folding container is assembled in a box shape.

FIG. 4 is a perspective view of a folding container of the above-mentioned folding container.

FIG. 5 is a cross-sectional view showing a state in which only the first side plate is erected first while the second side plate of the same is laid down, and the self-standing holding means holds the erected posture.

FIG. 6 is a front view of a state in which only the first side plate is first erected first to be self-standing in a state where the second side plate of the same is laid down.

FIG. 7 is a front view of a main part of a state in which the first side plate and the second side plate of the same are erected and assembled in a box shape.

FIG. 8 is a front view of the main part of the first side plate and the second side plate of the same, which are folded and folded.

FIG. 9 is a bottom view showing a bottom view of the above bottom plate.

10 is an enlarged cross-sectional view taken along line XX of FIG.

FIG. 11 is an enlarged sectional view taken along line YY of FIG. 9;

12 is an enlarged sectional view taken along line ZZ in FIG.

Claims (2)

(57) [Claims] 1. A pair of first side plates rotatably attached to a pair of opposite sides of a rectangular bottom plate, and a pair of second side plates rotatably attached to another pair of opposite sides. The side plates are folded with the pair of second side plates laid down and the pair of first side plates laid down, and the pair of first side plates are erected first and then the pair of second side plates are erected. A box-shaped folding container provided with self-supporting means for maintaining the self-sustaining state with the first side plate first erected, wherein the bottom plate rotates the lower end of the first side plate.
First mounted in a standing state on the side edge of the bottom plate.
Provide a rising portion facing the lower end of the outer surface of the side plate of
A protrusion is provided on the lower end of the outer surface of the first side plate so as to extend outward.
The upper surface of the rising part facing the protrusion.
Inclination tilted away from the first side plate
A slope portion is provided, and the self-sustaining means is formed by the slope portion and the protrusion.
And the first side plate is erected first and the protrusion is tilted.
A foldable container characterized by being pressed against the slope . 2. A bottom surface of a rectangular synthetic resin bottom plate.
A large number of reinforcing ribs are integrally formed on the
Of these, at least the short side ribs along the opposite short sides
And located in the center in the short side direction, parallel to the long side and at both ends
The long side center rib where the part is continuous with both short side ribs is another
Gas injection that is wider and hollow inside than strong ribs
Hollow ribs formed by
The both ends of the hollow part of are communicated with the hollow part of the short side ribs,
The corner portion formed by the outer surface and the lower end surface of the short side rib is a surface.
The folding container according to claim 1, wherein the folding container is a chamfered portion .