JPH06211240A - Foldable container - Google Patents

Abstract

PURPOSE:To provide a folding container which has sufficient strength and also can be easily folded and assembled. CONSTITUTION:A foldable container comprises a rectangular upper frame 1, an inner side plate 2 with upper end holding parts 2a, 3a fixed to two opposite sides of the upper frame 1 and an outer side plate 3 having the upper end holding parts 2a, 3a fixed to the two opposite sides of the upper frame 1 and placed outside the inner side plate 2. The inner side plate 2 is formed to have a U-shaped opening with side plates 2b connected to both sides of a bottom plate 2c, while the outer side plate 3 has a U-shaped opening with side plates 3b connected to both ends of the bottom plate 2c, intersects with the inner side plate 2 in a crossing and has the bottom plates 2c, 3c overlaid, wherein a hinge 2a is provided at an approximate center of the side plate of the inner side plate 2 and the side plate of the outer side plate 3 which is folded inside at the time of being folded.

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 It is characterized in that the bottom plates are arranged so as to be overlapped with each other, and a hinge portion that enters inside at the time of folding is provided at substantially central portions of the side plates of the inner plate and the side plates of the outer plate.

[0006]

In the folding container configured as described above, when folding, the inner plate is first folded so that the central hinge portion of the side plate is bent inward, and then the outer plate is folded.
Similarly, the hinge portion at the center of the side plate is folded so as to be bent inward, and is folded into 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 side plate is first pulled down from the inside of the upper frame and the hinge portions are opened to make the side plates on both sides into a flat shape, as opposed to the folded state. Open in a U shape. Next, similarly, the inner plate is pulled down from the inside of the upper frame, and both hinge parts thereof are opened to make the side plates on both sides into a flat shape 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 concave portion 1a for inserting holding portions 2a, 3a of an inner plate 2 and an outer plate 3, which will be described later, is horizontally formed over the entire circumference. A locking protrusion is provided in the recess 1a in order to prevent the holding portion to be inserted from coming off.

Further, on the upper surface of the upper frame 1, there is provided a ridge 1b for positioning when a plurality of containers are stacked, projecting along the longitudinal direction of the frame. Further, the upper frame 1 is provided with an inner eaves portion 1c so as to extend over the entire inner periphery thereof, and a falling wall 1d is provided on the lower portion of the upper frame 1 along the entire lower periphery. Further, a locking portion 1e for locking the folded outer plate 3 and preventing the hanging down is provided at the lower end of the side wall 1d so as to project inward (FIGS. 6 and 8). .

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. Further, a horizontal hinge portion 2d is provided at the center of the side plate 2b, and the side plate 2b is foldable so that the hinge portion 2d can be put inside.

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 continuing to the holding portion 3a through the fixed wall portion 3e.
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, as shown in FIG. 5 and FIG. 7, the both holding portions 3a of the outer side plate 3 are recessed portions 1a at the front and rear sides of the upper frame 1.
It is inserted inside and fixed. The fixed wall portion 3e provided between the holding portion 3a and the side plate 3b and fixed to the inner side of the upper frame 1 is provided with a width that allows the folded inner plate 2 to be housed, as shown in FIG. To be In addition, a horizontal hinge portion 3d is provided at the center of the side plate 3b, and the side plate 3b has the hinge portion 3d.
It can be folded so that d can be put inside.

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 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-mentioned construction, as shown in FIG. 6, first, the inner plate 2 is folded so that the hinge portion 2d at the center of the side plate 2b is bent inward, and then the upper plate is raised. It is put inside the fixed wall portion 3e in the frame 1.

Next, the outer side plate 3 is similarly attached to its side plate 3b.
The hinge part 3d at the center is folded so as to be bent inward, and the folded part is put in the falling wall 1d of the upper frame 1. With this, the container is folded as shown in FIG. 8 and the outer side plate 3 is locked by the locking portion 1e, so that the folded state is well maintained.

On the other hand, when the container is assembled from the folded state, the outer side plate 3 is first fixed to the engaging portion 1e, as opposed to the folded state.
, And pull down to open the hinge portion 3d so that the side plates 3b on both sides have a flat shape and open in a U shape. Next, the inner side plate 2 is similarly pulled down from the inside of the upper frame 1, and both hinge portions 2d thereof are opened to make the side plates 2b on both sides flat. 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.

In this way, since the double bottom is formed by the bottom plates of the inner plate 2 and the outer plate 3, it is possible to enhance the strength of the container and carry heavy objects. Further, since the holding portions 2a, 3a of the inner plate 2 and the outer plate 3 are horizontally inserted and fixed in the recess 1a of the upper frame 1, it is possible to sufficiently hold the load applied to the inner plate 2 and the outer plate 3. it can.

In the inner plate 2 and the outer plate 3 of the above embodiment, a part of the thickness of the plastic corrugated board is cut to form a hinge portion, but it may be simply bent to form a hinge portion. 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 are 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, as shown in FIG. 9, the upper frame 1 can 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 hinge part 12d is horizontal at the center of the side plate 12b.
Is provided, and the side plate 12b is foldable so that the hinge portion 12d is placed inside. An upper frame portion 12a having a U-shaped cross section formed by bending the extended portion outward is formed integrally with the upper portion of the side plate 12b.

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
It is integrally formed via a hinge part that can be repeatedly bent, and a horizontal hinge part 13d is provided at the center of the side plate 13b. The side plate 13b is foldable so that the hinge part 13d can be put inside. A fixed wall portion 13e is provided on the upper portion of the side plate 13b, and an upper frame portion 13a having a U-shaped cross section formed by bending the extended portion outward is integrally formed on the upper portion of the fixed wall portion 13e. 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, the L-shaped reinforcing connecting tool 14 is assembled from the outside to the four corners of the upper frame portions 12a, 13a of the assembled inner plate 12 and outer plate 13 to connect the corner portions of the box. The container is completed. This container can also be easily folded as above.

[0024]

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.

[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 of a folded state.

FIG. 7 is a cross-sectional view of a folded state.

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

FIG. 9 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-hinge part, 3-outer plate, 3a-holding part, 3b-side plate, 3c-bottom plate, 3d-hinge part.

Claims (3)

[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. A folding container, characterized in that a hinge portion that enters inside when folded is provided at approximately the center of the side plate of the plate and the side plate of the outer plate. 2. A horizontal recess is provided all around the inside of the upper frame, and a holding portion for holding the inner plate and the outer plate is horizontally inserted into and fixed to the recess. Folded container as described. 3. An inner plate having an upper frame portion bent at two opposite sides of a rectangular plane of the container, and an upper frame portion bent at another two opposite sides of the rectangular plane. And an outer plate disposed outside of the inner plate, the inner plate is formed to have a U-shaped open shape by connecting side plates to both sides of the bottom plate, and the outer plate of the bottom plate is formed. Side plates are connected to both sides to have a U-shaped open shape, and the side plates of the inner plate and the outer side are arranged so as to intersect the inner plate in a cross shape and overlap the bottom plate with the bottom plate. A folding container, characterized in that a hinge portion is provided at a substantially central portion of a side plate of the plate so as to enter inside when folded.