JPH06345084A - Folding container - Google Patents

Abstract

PURPOSE:To provide a folding container having a sufficient strength and capable of being folded and refabricated easily. CONSTITUTION:The folding container is provided with a rectangular upper frame 1, an inner side plate 2 having its top retaining parts fixed to the two opposite sides of the upper frame 1 and an outer side plate 3 having its top retaining parts fixed to the other two opposite sides of the upper frame 1 and disposed outside the inner side plate 2. The inner side plate 2 has its side plates formed continuously from both the sides of its bottom plate to form a U-shaped opening, the outer side plate 3 has its side plates formed continuously from both the sides of the bottom plate to form a U-shaped opening and is disposed in a crosswise arrangement with the inner side plate 2 and in such a manner as to lay their bottom plates one upon the other and at least one hinge part is provided on the side plate of the inner side plate 2 and the bottom plate of the outer side plate 3 in parallel relation to the side plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable foldable container used for storing, transporting and carrying various industrial parts.

[0002]

2. Description of the Related Art Conventional folding containers of this type have been disclosed in Japanese Utility Model Publication No. 60-167733 and Japanese Utility Model Publication No. 63-1262.
No. 35, etc., a side plate is attached to a rising wall provided on a pair of opposite sides of a bottom plate through a hinge portion, and a rectangular frame-shaped upper frame surrounds both side plates and slides. A folding side plate that is horizontally arranged as possible and has two plates connected to each other via hinges to two opposite sides (two sides without side plates) of the upper frame faces downward. A folding container has been proposed in which both folding side plates are mounted so that the folding side plates are configured to perform a folding operation between the both side plates.

[0003]

However, in this type of folding container, since the lower edges of the folding side plates on both sides are in a free state, the strength of the container is reduced when the folding container is left as it is. In order to maintain the strength, it is necessary to provide a strong fitting mechanism between the lower edge of both folding side plates and the two sides of the bottom plate to fit both parts. There is a problem that it becomes complicated and the folding and assembling operations of the container become complicated.

The present invention has been made in view of the above points, and an object of the present invention is to provide a folding container which has sufficient strength and which can be easily folded and assembled.

[0005]

In order to achieve the above object, the folding container of the present invention has a rectangular frame-shaped upper frame, and a holding portion at the upper end fixed to two opposite side portions of the upper frame. Inner plate, and an outer plate having a holding portion at the upper end fixed to the other two opposite sides of the upper frame and arranged outside the inner plate. The inner plate connects the side plates to both sides of the bottom plate. It is formed to have a U-shaped open shape, and the outer plate has a U-shaped open shape by connecting side plates to both sides of the bottom plate and intersects the inner plate in a cross shape and The bottom plates are arranged so that they overlap each other, and the outer plate and the inner plate are provided with a fixed wall part between the upper end holding portion and the side plate, and at least one hinge part is parallel to the side plates on the bottom plate of the inner plate or the outer plate. It is characterized by being provided in.

[0006]

In the folding container configured as described above, when folding, the inner plate is first folded by bending a plurality of hinge portions of the bottom plate inward or outward, and then the outer plate is folded. Similarly, a plurality of hinge portions of the bottom plate are folded so as to be bent inward or outward, and are folded in the upper frame, so that the container is in a folded state.

On the other hand, when the container is assembled from the folded state, the outer plate is first pulled down from the inside of the upper frame to open the side plate and the bottom plate by opening the hinge portion of the bottom plate, as opposed to the folded state. Make it flat and open in a U shape. Next, pull down the inner plate from inside the upper frame as well, open the side plate,
Open the hinges of the bottom plate so that the bottom plates on both sides are flat and open in a U shape. In this state, the bottom plate of the inner plate is overlaid on the bottom plate of the outer plate, and the double bottomed container is assembled.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of the folding container, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof. Reference numeral 1 denotes an upper frame of the container, which is formed of, for example, synthetic resin in a rectangular frame shape as a whole. Inside the upper frame 1, a recessed portion 1a for inserting holding portions 2a, 3a of an inner plate 2 and an outer plate 3 described later is formed over the entire circumference. This recess 1a
Is formed so that the insertion port is horizontal and has a space bent vertically in the back, and the holding portions 2a, 3a of the inner plate 2 and the outer plate 3 are inserted in a state of being bent at a right angle, and It prevents it from coming off.

Further, on the upper surface of the upper frame 1, a ridge 1b for positioning when a plurality of containers are stacked is provided so as to project along the longitudinal direction of the frame. In addition, the upper frame 1 is provided with an inner eave portion 1c so as to project over the entire inner circumference.

Reference numeral 2 denotes an inner plate, which is formed, for example, by folding it into a substantially U-shape with a cardboard made of synthetic resin. The inner plate 2 includes a holding portion 2a to be inserted into the recess 1a and a holding portion 2a.
And a bottom plate 2c continuing from the side plate 2b, and each part is integrally formed via a hinge portion that can be repeatedly bent. Both holding portions 2a of the inner plate 2 are inserted and fixed in the recesses 1a on both sides of the upper frame 1, as shown in FIGS. One holding portion 2a
A fixed wall portion 2g is provided between the side plate 2b and the side plate 2b. Also,
As shown in FIG. 3, the bottom plate 2c has three hinge portions 2d,
2e and 2f are provided in parallel with the side plate 2b, and as shown in FIG. 6, the hinge part 2d is bent so as to enter the inside, and the hinge parts 2e and 2f are bent so as to project to the outside so that they can be folded. .

Reference numeral 3 denotes an outer plate, which is formed by folding it into a substantially U-shape with, for example, a synthetic resin corrugated cardboard and is tightly assembled to the outer side of the inner plate 2 in the same manner as described above. Outer plate 3
Is, like the inner plate, a holding portion 3a that is inserted into the recess 1a.
And the side plate 3b following the holding part 3a via the fixed wall part 3g.
And a bottom plate 3c following the side plate 3b, and each part is integrally formed via a hinge part that can be repeatedly bent. Then, the both holding portions 3a of the outer side plate 3 are arranged as shown in FIG.
As shown in FIG. 3, the upper frame 1 is inserted and fixed in the recesses 1a on the front and rear sides.

The fixed wall portion 3g provided between the holding portion 3a and the side plate 3b and fixed to the inside of the upper frame 1 can accommodate the folded inner plate 2 as shown in FIG. It is provided in width. Further, the bottom plate 3c has three hinge portions 3d, 3
e and 3f are provided in parallel with the side plate 3b, and as shown in FIG. 7, the hinge part 3d is bent so as to protrude outward, and the hinge parts 2e and 2f are bent so as to enter inside, so that they can be folded. .

As described above, the inner plate 2 and the outer plate 3 are attached to the two opposite sides of the upper frame 1 with the holding portions 2a and 3a fixed, and the inner plate 2 and the U-shaped inner plate 2 are attached. The outer plates 3 are arranged so as to cross the cross shape, and form independent double bottoms in each of the bottom plates 2c and 3c.

When folding the folding container having the above structure, as shown in FIG. 6, first, the inner plate 2 is bent inward at the hinge portion 2d of the bottom plate 2c, and the hinge portions 2e and 2f are projected outward. Fold in this way and put it inside the fixed wall portion 3g in the upper frame 1.

Next, the outer plate 3 is similarly set to its bottom plate 3c.
The hinge portion 3d of the
Fold it inward so that it fits inside the top frame 1. The container is now folded as shown in FIG.

On the other hand, when the container is assembled from the folded state, the outer side plate 3 is first opened horizontally so that the hinge portions 3d, 3e, 3f of the bottom plate 3c are opened, contrary to the folded state.
The side plate 3b and the bottom plate 3c are opened in a U-shape so that the side plates 3b on both sides stand upright. Next, the inner side plate 2 is similarly pulled down from the inside of the upper frame 1, the respective hinge portions 2d, 2e, 2f of the bottom plate 2c are opened horizontally, and the side plates 2b on both sides are erected.
The side plate 2b and the bottom plate 2c are opened in a U shape. In this state, the bottom plate 2c of the inner plate 2 is superposed on the bottom plate 3c of the outer plate 3 to form a double bottom, and both side ends of the side plate 2b of the inner plate 2 are sandwiched inside the side plate 3b of the outer plate 3. As a result, a strong box with no gap can be easily formed.

Since the double bottom is formed by the bottom plates of the inner plate 2 and the outer plate 3 as described above, the strength of the container can be increased and heavy objects can be transported. Further, since the holding portions 2a, 3a of the inner side plate 2 and the outer side plate 3 are bent and inserted at a right angle into the concave portion 1a of the upper frame 1 and fixed,
Therefore, the load applied to the outer plate 3 can be sufficiently retained. In addition, the hinge portions of both the inner plate 2 and the outer plate 3 are bottom plates 2.
Since the side plates 2b and 3b are provided in c and 3c and have a plate shape without a hinge portion in the middle, the side plates 2b and 3b can sufficiently hold a vertical load.

In the inner plate 2 and the outer plate 3 of the above-mentioned embodiment, a part of the thickness of the plastic corrugated board is cut to form a hinge part, but it may be simply bent to form a hinge part, and other parts. It can also be a hinged hinge. Further, the inner plate 2 and the outer plate 3 may be formed of a plastic plate, a metal plate, a paper corrugated cardboard, etc., in addition to the plastic cardboard.

Further, when the bottom plates 2c and 3c are provided with protrusions and recesses or protrusions and holes which can be engaged with each other and engaged with each other, the inner plate 2 and the outer plate 3 are prevented from being displaced during assembly. it can. Further, if the length of the bottom plate 2c of the inner side plate 2 is made smaller than the width of the bottom plate 3c of the outer side plate 3, it is possible to extremely reduce the gap that tends to occur between the side plates 2b and 3b.

Further, the upper frame can be constructed as shown in FIG. That is, the upper frame 11 is formed in a rectangular frame shape as a whole in a plan view, and a horizontal shape for fitting the inner plate 2 and the holding portions 2a, 3a of the outer plate 3 inside the middle portion of the upper frame 11. The recess 11a is formed over the entire circumference.

An inner eaves portion 11c is provided above the concave portion 11a so as to project, and a convex strip 11b for positioning when stacking a plurality of containers is provided on the upper frame 11 in the longitudinal direction of the frame. Is projected along. A holding wall 1 for holding the outer plate 3 in a folded state is provided on the lower portion of the upper frame 11.
1d is formed on the entire circumference, and further, at the lower end of the holding wall 11d, a locking portion 11d for locking the outer plate 3 and preventing sagging is provided.

Further, as shown in FIGS. 11 and 12, the upper frame may be formed by bending the upper ends of the inner plate 12 and the outer plate 13.

That is, for example, the inner plate 12 formed by bending a synthetic resin corrugated board into a substantially U-shape is a side plate 12.
b and a bottom plate 12c following the side plate 12b, each part is integrally formed via a hinge part that can be repeatedly bent, and the bottom plate 12c has three hinge parts similar to the above. It is provided in parallel with, and it is possible to fold it by bending some hinge parts so as to enter the inside and folding other hinge parts so as to protrude to the outside. And the side plate 12
On the upper part of b, an upper frame part 12a is formed integrally with the extended part so that the extended part is wound outside in a cylindrical shape.

Also, the similar outer side plate 13 is the side plate 13b.
And a bottom plate 13c following the side plate 13b, and each part is
The bottom plate 13c is integrally formed with a hinge part that can be repeatedly bent, and the bottom plate 13c is provided with three hinge parts in parallel with the side plate 13b. The part can be folded by bending so as to project to the outside. And on the upper part of the side plate 13b,
An upper frame portion 13 in which the extended portion is wound outside in a cylindrical shape.
a is formed integrally with it.

The inner plate 12 and the outer plate 13 are arranged such that the upper frame portions 12a and 13a are located on two opposite sides of the rectangular plane of the container, the bottom plate 12c is on top, and the bottom plate 13c is on bottom. . Then, at the four corners of the upper frame portions 12a, 13a of the inner plate 12 and the outer plate 13 that have been assembled, the reinforcing connector 14 is assembled so as to connect the upper frame portions 12a, 13a on both sides, The corners are connected to complete the container. This container is also processed by the same process as the above, as shown in FIG.
You can fold it like.

In the above embodiment, the bottom plate is provided with three hinge portions each, but the number of hinge portions may be two or one depending on the size of the container. Further, instead of providing the hinge portion on the bottom plate, the hinge portion may be provided on the side plate, and the hinge portion may be provided on either the inner plate or the outer plate.

[0028]

As described above, according to the folding container of the present invention, the U-shaped inner plate and the outer plate, which are held at both ends by the upper frame and are arranged to intersect each other in a cross shape, are Since the side wall is formed, the strength is not reduced by the free end, and since the fitting mechanism of the complicated structure is not required, the structure is simple, it can be easily manufactured at low cost, and the assembly can be performed. -Easy folding operation. Further, since the bottom of the container has a double bottom by the inner plate and the bottom plate of the outer plate, the strength of the container is increased, and it becomes possible to store and transport heavy objects. Further, since the side plates of the inner plate or the outer plate are formed in a plate shape having no hinge portion in the middle portion, the side plates can sufficiently hold the vertical load, and the vertical strength is large.

[Brief description of drawings]

FIG. 1 is a front view of a folding container according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a cross-sectional view taken along line VV of FIG.

FIG. 6 is a cross-sectional view when folded.

FIG. 7 is a cross-sectional view when folded.

FIG. 8 is a cross-sectional view showing a state in which folding is completed.

FIG. 9 is a perspective view of a corner portion of the container.

FIG. 10 is a cross-sectional view of an upper frame portion of another embodiment.

FIG. 11 is a partial perspective view of a folding container according to another embodiment.

FIG. 12 is a partial perspective view of a folding container according to another embodiment.

[Explanation of symbols]

1-upper frame, 2-inner plate, 2a-holding part, 2b-side plate, 2
c-bottom plate, 2d, 2e, 2f-hinge part, 3-outer plate,
3a-holding part, 3b-side plate, 3c-bottom plate, 3d, 3e,
3f-hinge part.

Claims (1)

[Claims] 1. A rectangular frame-shaped upper frame, an inner plate to which upper end holding portions are fixed to two opposite side portions of the upper frame, and upper ends on other two opposite side portions of the upper frame. An outer plate to which the holding portion is fixed and is arranged outside the inner plate, and the inner plate is formed by connecting side plates to both sides of the bottom plate so as to have a U-shaped open shape, The outer plate is formed by connecting side plates to both sides of the bottom plate and has a U-shaped open shape, and is arranged so as to intersect the inner plate in a cross shape and to overlap the bottom plate with the bottom plate. The plate and the outer plate are provided with a fixed wall portion between the upper end holding portion and the side plate, and at least one hinge portion is provided in parallel with the side plate on the inner plate or the bottom plate of the outer plate. Folding container.