JPH05319432A - Foldable returnable case - Google Patents

Abstract

PURPOSE:To provide a returnable case capable of being folded and refabricated extremely easily. CONSTITUTION:The returnable case is composed of upper and lower reinforcing frames 10 and 12, a bottom plate 14 and first to fourth side plates 16, 18, 20 and 22 vertically set on the peripheral edges of the bottom plate 14. Each of the first and second side plates 16 and 18 is provided with a thin-walled hinge part 30a lengthwise along its middle and a hinge 30b at each end of the hinge part and has its lower edge disposed in opposite relation to a reinforcing frame 34 fixed to a raised part 14b of the bottom plate 14. An auxiliary plate 42 is provided with a thin walled hinge part 42a and a reinforcing material 42b fixed to the upper part thereof and has its lower edge fixed to a raised part 14b. Each of the third and fourth side plates 20 and 22 has its lower edge fixed to a lower reinforcing frame 12 and is provided with a reinforcing material 38 fixed to its upper part. The fourth side plate 22 is provided with a plurality of spring members 52 adapted to normally bias this side plate in its rising direction. The lower reinforcing frame 12 is provided at its corners with projections 28 engageable with the engaging parts of the upper reinforcing frame 10 upon folding the case.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a plastic board,
The present invention relates to a foldable returnable box made of cardboard, plastic cardboard and plywood.

[0002]

2. Description of the Related Art Various foldable boxes have been proposed for the purpose of saving storage space when not in use and improving transport efficiency. As a folding method of these boxes, of four side plates standing upright on the bottom plate, for example, a pair of toe sides is connected by a hinge to form a rotatable swing plate, and the other opposing pair is divided into two. It is known that they are hinged to each other and folded inward.
A pair of side plates and a tilt plate are folded on the bottom plate.

Further, as a typical manufacturing method of this type of folding box, there is a method of forming the bottom plate, the side plate, the tilt plate and the like by injection molding of plastic and integrally providing the above-mentioned hinge at the time of this molding. However, in such a manufacturing method by injection molding, the molding die is expensive and the size of the box is limited.

Therefore, the inventors of the present invention have developed a foldable returnable box which can solve such a problem, and propose a Japanese Patent Application No. 3-8.
It has already been proposed in 9321. The returnable box according to this application includes an upper and lower reinforcing frame, a bottom plate to which the reinforcing frame is fixed,
A pair of first and second side plates facing each other among the side plates, wherein a pair of first and second side plates facing each other are provided at four joints between the middle one in the height direction and the bottom plate and the upper reinforcing frame. The other third, which has a hinge part in the vicinity and faces each other
The third side plate has a hinge portion near at least one of the joints on the bottom plate side or the upper reinforcing frame side, and is engaged with a protrusion that fits between the upper and lower reinforcing frames when folded into the reinforcing frame. It is characterized by having a joint.

According to this structure, the size of the box can be arbitrarily selected, and the handling effect in the folded state is simplified. However, the returnable box according to this application had the technical problems described below according to the subsequent studies.

[0006]

That is, in the returnable box according to the above application, the first and second side plates are formed with hinge portions at a plurality of locations, and the first and second side plates are provided with the hinge portions. Since the self-supporting property is lacking, auxiliary auxiliary plates are adhered or fixed by rivets to the insides of the side plates, and the auxiliary auxiliary plates are locked to the inner surface of the side plate with fasteners.

However, in such a structure, when the box is folded or assembled, it is necessary to attach and detach the fastener of the auxiliary attachment plate, which is a problem in that these operations are troublesome.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a foldable returnable box which can be folded and assembled very easily. ..

[0009]

In order to achieve the above-mentioned object, the present invention provides an upper and lower reinforcing frame, a bottom plate to which the lower reinforcing frame is fixed, and four side plates which are erected on four circumferences of the bottom plate. And a pair of first and second side plates facing each other among the side plates, the upper ends of the pair of first and second side plates facing each other are fixed to the upper reinforcing frame, and the upper and lower intermediate positions in the height direction and the upper side The other third and fourth side plates, which have hinge portions provided respectively in the vicinity of the joint portion with the reinforcing frame, and the opposing third and fourth side plates, are provided in the vicinity of the joint portion with the bottom plate, and the third and fourth side plates. A spring member for urging at least one of the fourth side plates in the upright direction, and the reinforcing frame has a protrusion and an engaging portion that are mutually fitted between the reinforcing frames in a folded state. An auxiliary member having a lower portion fixed to the bottom plate on the inner surface side of the first and second side plates Characterized in that a plate.

The third and fourth side plates may be provided with a projecting piece for pressing the auxiliary attachment plate toward the first and second side plates when assembled on the side surface side thereof.

[0011]

The foldable returnable box of the present invention is provided with the spring member for urging at least one of the third and fourth side plates in the upright direction. Therefore, during assembly of the box,
The side plate that is biased by the spring material stands up slightly and supports the auxiliary attachment plate from the inside. When the box is folded, the third and fourth side plates are folded on the bottom plate, and the third and fourth side plates are held by the auxiliary attachment plates, so that the first and second side plates are folded on top of them. You can

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 7 show an embodiment of a folding returnable box according to the present invention. As shown in FIG. 1, the returnable box shown in FIG. 1 has upper and lower reinforcing frames 10 and 12, a bottom plate 14 to which the lower reinforcing frame 12 is fixed, and four standing plates standing on four sides of the bottom plate 14. And the first to fourth side plates 16, 18, 20, 22 of
It has a rectangular parallelepiped structure with an open top.

In this embodiment, the upper and lower reinforcing frames 10 and 12 are made of aluminum, and the upper reinforcing frame 10 is formed in a rectangular shape having a substantially concave cross section. An L-shaped corner member 24 having a tip portion protruding upward is fixed, and in the concave portion of each corner,
An L-shaped engaging portion 26 as shown in FIG. 4 is fitted and fixed.

The lower reinforcing frame 12 is formed of an angle having a substantially L-shaped cross section, is fixed to both sides of the bottom plate 14 in the longitudinal direction by rivets, and has projections 28 projecting upward at four corners of the bottom plate 14. There is. In this embodiment, the bottom plate 14 forms a bent portion 14a orthogonal to the longitudinal direction, and a pair of upright portions 14b (height h ') that are upright and face the short side.
Are formed. Although the lower reinforcing frame 12 is provided only on both sides of the bottom plate 14 in the longitudinal direction in this embodiment, it may be formed in the same rectangular shape as the upper reinforcing frame 10.

The bottom plate 14 and the first to fourth side plates 16 to 22
In this example, plastic corrugated cardboard (manufactured by Ube Nitto Kasei; trade name DAMPLATE A-5) is used. As shown in FIGS. 1 and 2, the first and second side plates 16 and 18 provided at opposing positions in the widthwise direction of the bottom plate 14 are provided with cardboard approximately on the center axis in the height direction thereof. The thin hinge portion 30a having a reduced thickness is provided,
It can rotate by 180 °, and a pair of hinges 30b made of plastic and hinged to a rotation shaft are fixed to both ends of the thin hinge portion 30a.

Further, the upper ends of the first and second side plates 16 and 18 are fitted and fixed in the recesses of the upper reinforcing frame 10 and formed by pressure ruled lines in the vicinity of the fitted and fixed portions 90. A bent hinge portion 30c that can rotate by 90 ° is formed. Further, the lower ends of the first and second side plates 16 and 18 are opposed to the reinforcing frame 34 fitted and fixed to the tip of the rising portion 14 b of the bottom plate 14.

Auxiliary attachment plates 42 are arranged inside the first and second side plates 16 and 18, respectively. The auxiliary attachment plate 42 is made of plastic corrugated cardboard like the side plates, and has a folding hinge portion 42a formed of a pressure ruled line and rotatable by 90 ° at a height position substantially corresponding to the reinforcing frame 34. At the same time, the reinforcing member 42b made of aluminum is fixed to the upper end thereof, and the lower end side thereof is fixed to the rising portion 14b of the bottom plate 14 by rivets,
At its upper part, it is fixed to the first and second side plates 16 and 18 by rivets.

On the other hand, the third and fourth side plates 20 and 22 are provided at opposite positions in the longitudinal direction of the bottom plate 14.
As shown in FIGS. 1 and 3, the lower end is fixed to the lower reinforcing frame 12 by rivets, and the upper end is fixed with a reinforcing member 38 having a substantially concave cross section.

Further, the third and fourth side plates 20 and 22 are provided with a hinge portion 46 by a pressure ruled line at a height position from the bottom plate 14 to h ', h''(h'<h''). Cage,
Starting from this hinge portion 46, the side plates 20 and 22 are
It is configured to be rotatable inward by 90 °.

The third and fourth side plates 20 and 22 are provided with projecting pieces 50 for pressing the auxiliary attachment plate 42 toward the first or second side plates 16 and 18, respectively, at both end edges of their short sides. (See Figure 8). Further, in this embodiment, when the side plates 20 and 22 are rotated toward the bottom plate 14, a plurality of spring members 52 for urging the fourth side plate 22 on the upper side in the direction of raising the side plates are provided. It is provided. Specifically, the spring material 52 is composed of a coil spring, has a through hole formed in the hinge portion 46, and is installed in the through hole.

Further, a cloth fastener 48 which is intertwined and engaged with each other is attached to a position where the reinforcing member 38 and the upper reinforcing frame 10 are in contact with each other. FIG. 4 shows details of the engaging portion 26 and the protrusion 28. In this embodiment, the engaging portion 26 is formed of a plastic molded product, and the upper reinforcing frame 1 is provided.
An L-shaped main body portion 26a fitted and fixed in a concave portion provided at a corner of 0, and an L-shaped hole formed in a corner portion of the main body portion 26a and into which a protrusion 28 of the lower reinforcing frame 12 is inserted. Part 26b
It consists of and.

The protrusion 28 has an L-shaped cross section corresponding to the hole 26b. In addition, the protrusion 28 and the hole 2
In the fitting relationship with 6b, for example, a close fitting state in which the projection 28 is press-fitted, or when the through hole is formed in the projection 28 and the projection 28 is inserted into the hole portion 26b, the through hole is fitted into the through hole. For example, a configuration in which a convex portion that fits in is provided is used.

Next, folding and assembling of the returnable box having the above structure will be described. First, when folding the returnable box, from the state shown in FIG.
The side plate 20 is rotated on the bottom plate 14. In this state, since the protruding piece 50 of the fourth side plate 22 presses the auxiliary attachment plate 42 toward the first and second side plates 16 and 18, the independence of the first and second side plates 16 and 18 is not lost. , Almost upright.

Next, the fourth side plate 22 is rotated on the third side plate 20 against the biasing force of the spring member 52. At this time,
When the fourth side plate 22 is almost completely rotated on the third side plate 20, the pressing force of the protruding piece 50 disappears. Therefore, when the auxiliary side plate 42 is pushed inward, the first and third side plates 16, 1 are released.
Nothing supports the self-supporting property of 8, and the auxiliary attachment plate 42 and the first and second side plates 16 and 18 are folded so as to fall on the fourth side plate 22.

Then, the protrusion 28 is formed in the hole 26 of the engaging portion 26.
Inserting into b and fitting them together completes the folding of the box. The state of the box thus folded is shown in FIG. The box in this state can be easily handled, for example, by hooking a hooking jig on the handle 60.

Further, in the returnable box of this embodiment, when folded as shown in FIG. 5, since the hinge portions 34 and 46 are provided at the heights h ′ and h ″ from the bottom plate 14, this height A space corresponding to is formed on the bottom plate 14, and in this space,
For example, it becomes possible to store a prefabricated partitioning member that is inserted inside the returnable box.

Next, the case of assembling the folded state shown in FIG. 5 to the state shown in FIG. 1 will be described. At the time of assembly, first, the upper reinforcing frame 10 is gripped and pulled upward to release the fitting state between the protrusion 28 and the hole 26b,
Further, the upper reinforcing frame 10 is pulled up.

By this operation, when the upper reinforcing frame 10 is separated upward, the fourth side plate 22 tries to stand up by the urging force of the spring member 52 and pushes up the auxiliary attachment plate 42. This state is shown in FIGS. 6 and 7. Then, when the upper reinforcing frame 10 is further pulled up, the first and second side plates 16 and 18 are in an upright state.
When the reinforcing member 42b is locked to the lower portion of the upper reinforcing frame 10, the first and second side plates 16 and 18 are supported by the reinforcing member 42b.

Next, the urging force of the spring member 52 causes the fourth side plate 22 in a substantially upright position to rotate to reinforce the reinforcing member 38.
Is fastened to the upper reinforcing frame 10 with the fastener 48, and the third side plate 2
When 0 is similarly locked, the auxiliary attachment plate 42 is moved to the first position by the protrusion 50.
Or, the state of being pressed against the second side plates 16 and 18 is brought to the state of FIG. 1, and the assembly of the returnable box is completed.

According to the returnable box having the above construction, the fourth
Since the spring member 52 that biases the side plate 22 in the standing direction is provided, the side plate 22 that is biased by the spring member 52 stands up slightly during the assembly of the box, and the auxiliary attachment plate 42 is pushed from the inside. support. Further, when folding the box, when the third and fourth side plates 20 and 22 are folded onto the bottom plate 14, the third and fourth side plates 20 and 22 are pressed by the auxiliary attachment plate 42, so that the first and the fourth side plates are pressed. The two side plates 16 and 18 can be folded on top.

Although the spring member 52 is provided only on the fourth side plate 22 in the above embodiment, the present invention is not limited to this, and the spring member 5 is also provided on the third side plate 20.
2 may be provided, or the spring member 52 may be provided only on the third side plate 20 side.
Can be provided. Also, the third and fourth side plates 2
The protrusions 50 provided at 0 and 22 may not necessarily be provided, for example, if the reinforcing member 42b of the auxiliary attachment plate 42 and the upper reinforcing frame 10 are tightly locked.

[0032]

As described in detail above, according to the foldable returnable box of the present invention, a spring member for urging the side plate in the upright direction is interposed in a part of the side plate. Very easy to fold and assemble.

[Brief description of drawings]

FIG. 1 is a perspective view of a foldable returnable box according to the present invention in an assembled state.

FIG. 2 is a sectional view taken along line aa of FIG.

FIG. 3 is a sectional view taken along line bb of FIG.

FIG. 4 is an enlarged perspective view of a fitting portion of the box shown in FIG.

5 is a perspective view of the box shown in FIG. 1 in a folded state.

FIG. 6 is a perspective view of the box shown in FIG. 1 during assembly.

7 is a sectional view taken along line cc of FIG.

FIG. 8 is a sectional view taken along line d-d of FIG.

[Explanation of symbols]

 10 Upper reinforcing frame 12 Lower reinforcing frame 14 Bottom plate 16 First side plate 18 Second side plate 20 Third side plate 22 Fourth side plate 30a Thin hinge part 30b Hinge 30c Bending hinge part 46 Hinge part 50 Projection piece 52 Spring material

Claims (2)

[Claims] 1. A foldable carrying box having upper and lower reinforcing frames, a bottom plate to which the lower reinforcing frame is fixed, and four side plates standing upright on the four circumferences of the bottom plate, the collapsible carrying box having an open upper end, The pair of first and second side plates facing each other among the side plates,
The upper end is fixed to the upper reinforcing frame, has a hinge portion provided respectively at an intermediate position in the height direction and in the vicinity of a joint with the upper reinforcing frame, and the other opposing third and fourth side plates are A hinge portion provided in the vicinity of a joint portion with the bottom plate, and the third and fourth portions.
A spring member for urging at least one of the side plates in a standing direction, and the reinforcing frame, in a folded state, has a protrusion and an engaging portion that are mutually fitted between the reinforcing frames, A foldable carrying box, characterized in that an auxiliary attachment plate, the lower part of which is fixed to the bottom plate, is provided on the inner surface side of the first and second side plates. 2. A foldable structure characterized in that each of the third and fourth side plates has a projecting piece that presses the auxiliary attachment plate toward the first and second side plates when assembled on a side surface side thereof. Returnable box.