JP2002321734A - Foldable housing box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foldable housing box in which an engaging projection of a disengageable corner member does not cause an obstruction when folding the housing box, and does not narrow an opening portion of the box. SOLUTION: In this foldable housing box, the bending position of a hinge formed with a folding frame body is set so that a side wall served as an outer wall is positioned higher than a side wall served as an inner wall by the length larger than the thickness of the side wall, an engaging receiver composing the corner member is provided with an engaging hole portion at a side portion abutting on an adjacent outer side wall, an inside surface crossing the hole portion at a right angle is provided with a recessed portion through a holding wall composing the side portion, and the engaging projection is provided with a projection projecting inwardly orthogonally from the side wall fixed with the engaging projection and enabling the fitting to the hole portion and a locking portion sliding and rushing into the recessed portion by being urged so as to be restored along the side wall to lock the holding wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure capable of compactly folding a foldable storage box used for transporting and storing articles.

[0002]

2. Description of the Related Art Conventionally, a foldable storage box having an open top for storing, for example, mechanical parts has been used.
This foldable storage box is assembled as a storage box when storing parts, but since the inside is empty when parts are taken out, the storage box is folded or stacked so that it is not bulky. I have. As this folding structure, for example, a structure in which the side wall is flipped up with the upper edge of the peripheral wall on the short side as a fulcrum and laid down with the peripheral wall on the long side, or the four side walls are centered on the bottom wall and The structure which expands and folds is known. However, in the above structure,
Even though they can be folded, many of them require a larger fold area than the bottom wall area, which is still not sufficient in terms of space efficiency when mounted and stored. Therefore, a structure is used in which the middle section of the four side walls is folded inward to be folded inward in order to fit within the area of the bottom wall, but there is a problem that the total height after folding is high. In addition, when a corner member to be disengaged is provided, there is a disadvantage that the protruding portion of the engaging projection interferes with other members when folded, and in order to avoid it, a portion corresponding to the interfering member is required. Notches had to be provided.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances.
It is an object of the present invention to provide a foldable storage box in which the four side walls are folded inward when the inside is empty and folded on the bottom wall to improve the space efficiency in transporting and storing empty boxes. Still another object of the present invention is to provide a foldable storage box in which an engaging projection of a corner member to be disengaged does not hinder the folding and does not narrow the opening of the storage box.

[0004]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, side walls are respectively arranged along four sides of a bottom wall, and one of the opposite side walls is formed by: Each of the side walls is connected to the bottom wall by a folding frame body serving as a hinge, and the side walls can be folded inside the bottom wall by the bending frame body. In a foldable storage box in which a detachable engagement protrusion constituting a corner member is provided on an outer side wall, and an engagement receiving member is provided on an inner side wall at an upper part of a corner formed therebetween. The bending position of the hinge by the bending frame body is set to be higher by the length of the side wall whose outer side wall is larger than the inner side wall by the thickness of the side wall, and the outer side wall adjacent to the engagement receiving member is provided. For hanging on the side contacting the side wall A concave portion is provided on an inner surface orthogonal to the hole portion via a restraining wall constituting a side portion, and the engaging protrusion is provided inward from a side wall to which the engaging protrusion is attached. A projection protruding perpendicular to the hole and capable of being fitted into the hole, and a locking portion that is urged to return along the side wall and slides and that protrudes into the recess and locks the restraining wall. , Taking the technical measures of. In the invention of claim 2, the bottom wall has a rectangular shape,
The short side walls are arranged facing each other along the short side, and the long side walls are arranged facing each other along the long side to form a box with the short side wall interposed therebetween. A technical means is provided in which a mating tool is provided, and engagement projections are provided at both ends of the upper edge of the long side wall. Further, in the invention according to claim 3, a lower corner member fixed to the bottom wall side at a lower portion of a corner formed between adjacent side walls and serving as a guide when stacking a folded storage box in a folded state. Are provided, and technical measures are taken.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a foldable storage box according to the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 3, the folding storage box includes a pair of long side walls 2 opposed to each other along a longitudinal side of a rectangular bottom wall 1.
And a pair of short side walls 3 opposing each other along the short side forms a four-peripheral wall, and the long side wall 2 forms a box body opened upward with the short side wall 3 sandwiched from both sides.

Here, the bottom wall 1, the long side wall 2 and the short side wall 3 are made of synthetic resin panels. As the synthetic resin panel, in the present embodiment, a hollow panel formed by extrusion molding of, for example, a polypropylene resin and having a large number of hollow portions extending in the extrusion direction is used. May be used.

In the case of the present embodiment, the bottom wall 1 is formed so that its longitudinal side is bent at right and left sides at right angles to form an angled section having a rising piece 1a. The end of the rising piece 1a of the bottom wall 1 and the lower end of the long side wall 2 are connected by a first bending frame 4 so as to be freely bent. As shown more clearly in FIG. 7, the first bent frame body 4 includes a first side wall lower frame portion 43 for fitting and fixing a lower end portion of the long side wall 2, and an end portion of the rising piece 1 a of the bottom wall 1. And a first bottom wall frame 41 and a first side wall lower frame portion 43.
And a first hinge portion 42 that flexibly connects the first hinge portion and the second hinge portion.

That is, the first side wall lower frame portion 43 and the first bottom wall frame portion 41 are both channel-shaped grooves in cross section, and extend continuously along the longitudinal direction of the bottom wall 1. The first side wall lower frame portion 43 and the first bottom wall frame portion 41 are connected to each other by a synthetic resin film serving as a first hinge portion 42 on the inner side, and the first hinge portion 42 is folded as a bending fulcrum. Sometimes, the long side wall 2 can be folded down toward the inside of the bottom wall 1.

Next, the short end of the bottom wall 1 and the lower end of the short side wall 3 are flexibly connected by a second folding frame 5. As shown in FIG. 8 more clearly, the second bent frame 5 has a second side wall lower frame portion 53 for fitting and fixing the lower end of the short side wall 3 and an end in the short direction of the bottom wall 1. The second bottom wall frame 51 to be fitted and fixed, and the second side wall lower frame 53
And a second hinge portion 52 that connects the second bottom wall frame portion 51 to bend freely.

That is, the second side wall lower frame portion 53 and the second bottom wall frame portion 51 are each formed of a channel-shaped groove, and extend continuously along the short direction of the bottom wall 1. Further, the second side wall lower frame portion 53 and the second bottom wall frame portion 51 are connected to each other by a synthetic resin film serving as a second hinge portion 52 on the inner side, and the second hinge portion 52 is folded as a bending fulcrum. At times, the short side wall 3 can be folded down toward the inside of the bottom wall 1.

Therefore, the bending position of the first hinge portion 42 by the first bending frame 4 on the long side wall 2 side is the second bending position on the short side wall 3 side.
The height of the rising piece, that is, the thickness of the short side wall 3 side when folded in this embodiment, that is, the thickness of the engagement receiving portion described later, than the bending position of the second hinge portion 52 by the bending frame 5. Is set to be higher than the length including the length, so that when the short side wall 3 is folded, the top surface thereof is set so as not to protrude beyond the height of the rising piece 1a. .

Next, the long side wall 2 is formed with a first vertical reinforcing frame 21 having a channel-like cross section along the left and right lateral ends thereof.
And the first lateral reinforcing frame 6 having a channel-shaped cross section is fitted and fixed along the upper end in the longitudinal direction.
The periphery of the long side wall 2 is reinforced with a frame together with the first bent frame 4. The short side wall 3 is fitted and fixed to the second vertical reinforcing frame 31 having a channel cross section along the left and right lateral ends thereof, and has a channel cross section along the upper end in the longitudinal direction. The second lateral reinforcing frame 7 is fitted and fixed, and the periphery of the short side wall 2 is reinforced by the frame together with the second bent frame 5. These frame members and corner members to be described later are made of a hard synthetic resin material injection-molded or extruded in the case of the present embodiment.

Each of the upper corners where the long side wall 2 and the short side wall 3 are orthogonally in contact with each other is connected to form a box shape, and the connection is released to enable folding. A corner member 8 composed of a combination of a mating projection and an engagement receiver is attached. That is, the corner member 8 includes an engagement protrusion 60 fixed at a position where the first horizontal reinforcing frame 6 and the first vertical reinforcing frame 21 intersect at the end of the upper edge of the long side wall 2 in the longitudinal direction; The short side wall 3 includes an engagement receiving member 70 disposed at a position where the second horizontal reinforcing frame 7 and the second vertical reinforcing frame 31 intersect at the end of the upper edge in the longitudinal direction.

That is, the engagement receiving member 70 attached to the short side wall 3 is provided with a pair of upper and lower locking holes 73, 74 on the side part which is in contact with the adjacent outer long side wall 2 (FIG. 2a). , FIG. 6). A recess 72 is formed on the inner surface of the engagement receiving member 70 perpendicular to the holes 73 and 74 via a restraining wall 75 constituting a side portion.

On the other hand, the engaging projection 6 shown in FIGS.
0 has a pair of upper and lower protrusions 63 and 64 which project perpendicularly inward from the wide surface side of the long side wall 2 to which the engaging protrusions 60 are attached and which can be fitted into the holes 73 and 74. I have. The engaging protrusion 60 is disposed between the protrusions 63 and 64 in the longitudinal direction of the long side wall 2, is urged to return along the long side wall 2, slides, and enters the recess 72. A slide plate 80 for locking the restraining wall 75 is provided. Here, the slide plate 80 has a hook portion 81 at the tip, is divided into inner and outer portions and extends doubly, and a finger hook portion 83 for unlocking operation protrudes from the outer piece 82. Also,
Pin P bridged between inner piece 84 and outer piece 82
Is fitted on a slider 85, and the slider 85 has a coil spring C whose base end is locked in the engagement protrusion 60.
The slide plate 80 is constantly urged in the extension direction (lock direction) in the guide hole G in the forward and backward directions.

With the above configuration, when assembling the storage box by locking the engagement receiving member 70 and the engaging protrusion 60, first, the long side walls 2 and the short side walls 3 are first raised.
The protrusion 6 of the engaging protrusion 60 provided on the long side wall 2 side
3 and 64 are used as the engaging holes 73 of the engagement receiver 70 on the short side wall 3 side.
74 (see FIG. 6). Similarly, the tip of the locking claw 81 of the slide plate 62 abuts against the restraining wall 75 forming the recess 72 of the engagement receiver 70 (see FIG. 6A), and is further folded down. As a result, the slide plate 80 retreats in the unlocking direction against the urging force via the locking claw portion 81 (see FIG. 6B). As a result, when the tip of the locking claw portion 81 gets over the restraining wall portion 75, the slide plate 80 is urged in the locking direction by the urging force and protrudes into the concave portion 72 to restrain the restraining wall portion 75.

At this time, in the present embodiment, the leading end of the restraining wall portion 75 over which the locking claw portion 81 rides is cut out to form the notched portion 7.
6, the locking claw portion 81 can be made to penetrate deep into the concave portion 72 and be completely immersed in the concave portion 72 (see FIG. 7C). 81 does not protrude into the storage box, and the internal volume can be used to the maximum. In this manner, box assembly of the folding storage box is completed.

A first corner abutment plate is provided on the upper part of the engaging projection 60 so as to expand outwardly and to cover the end in the thickness direction of the first lateral reinforcing frame 6 outside the first lateral reinforcing frame 6. The first corner contact plate 61 has a substantially angled cross section, and integrally forms a step on the first horizontal reinforcing frame 6. Further, the engagement receiving member 70 is expanded outward at an upper portion thereof to cover a position outside the second lateral reinforcing frame 7 so as to cover the second lateral reinforcing frame 7.
A second corner contact plate 71 forming a step is formed integrally therewith. The first corner abutment plate 61 and the second corner abutment plate 71 are combined to form a substantially L-shaped wall surface and a step portion, and positioning and hooking are performed when stacking the assembled folding storage boxes. It is a stopping means.

The engaging projection 60 shown in FIG. 11 shows a different embodiment of the slide plate 80. In this case, the hook 81 is formed so as to cut off the rear of the neck so as not to protrude into the inside of the box. By doing so, the hook 81 can be immersed in the recess 72. The other configuration is the same as that of the above embodiment, and the description is omitted.

Next, regarding the folding of the storage box, the bending position of the first hinge portion 42 by the first folding frame 4 is changed to the second hinge portion 52 by the second folding frame 5 as described above.
Is set to be higher than the bent position of the short side wall 3 by a length substantially equal to the thickness of the short side wall 3 side, so that the bent position of the first hinge portion 42 is the uppermost surface of the short side wall 3 when the short side wall 3 is folded. (See FIG. 3B). Thus, the long wall 2 can be folded inward at the first hinge portion 42 as a bending point so that the long side wall 2 is placed on the short side wall 3 (see FIG. 2B).

Thus, the box body with the four side walls folded down in the above procedure has a thickness in which the bottom wall 1, the long side wall 2 and the short side wall 3 are closely stacked when viewed from the side. Also, when viewed from the top, the four side walls are folded within the dimensions of the bottom wall, resulting in an extremely compact volume.

In the case of this embodiment, the adjacent long side wall 2
A lower corner member 90 is fixed to the bottom wall 1 at a lower portion of a corner formed between the bottom wall 1 and the short side wall 3. The lower corner member 90 is a bottomed member having a peripheral wall having an L-shaped cross section. The lower corner member 90 is externally fitted to a lower portion of the corner and fixed to the bottom wall 1 and the first bottom wall frame 41. The upper portion of the lower corner member 90 is stepped and expanded to form a step portion 91 along the peripheral wall. Therefore, the long side wall 2 and the short side wall 3 can be freely folded, and in this folded state, the step portion 91 of the lower corner member 90 is arranged at a height equal to or higher than the uppermost surface of the folded long side wall 2. You. Therefore, since the lower corner member 90 serves as a positioning guide at the time of stacking, it is possible to hook the bottom of the lower corner member 90 of another folded storage box on the stepped portion 91 and stack sequentially. (See FIGS. 9 and 10).

In this folding storage box, the bottom wall, the long side wall, and the short side wall are all formed of a hollow synthetic resin panel, and the frame and the corner members are made of, for example, polypropylene resin, so that recycling can be performed without any trouble. It becomes possible. Further, in the above-described embodiment, the case where the storage box has a rectangular parallelepiped shape whose bottom wall is rectangular is illustrated, but may be a cube shape where the storage box is square. The present invention is not limited to the above embodiment, and can be arbitrarily changed in design according to the application.

[0024]

According to the foldable storage box of the present invention, when it is not used, the storage box can be folded as compactly as possible, stacked in a plate shape and stored on a pallet for storage and transportation. In addition, the space and cost for transportation and storage can be greatly reduced. In addition, the inside of the box can be kept clean because dirt in the empty box can be prevented. Furthermore, there is no need to provide a notch in the frame since there is no interference between the bent frame that functions as a hinge and the engaging projection. Further, by providing the lower corner portion, the storage boxes can be stacked in multiple stages in a folded state. If the bottom wall, short side wall and long side wall, frame and corner members are all formed of a single material, it can be recycled without any trouble even after the storage box has been used and finally disposed of when it is finally disposed of. It has excellent advantages in environmental protection.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a foldable storage box of the present invention.

FIG. 2A is a cross-sectional view of the storage box in a lateral direction, and FIG. 2B is a cross-sectional view of the storage box in the folded state.

3A is a longitudinal sectional view of the storage box, and FIG. 3B is a sectional view of the storage box in the folded state.

FIG. 4 is a front view of the engagement protrusion.

FIG. 5 is a sectional view of a main part showing an engagement protrusion and an engagement receiver.

6 (a) to 6 (c) are cross-sectional views for explaining stepwise a state of engagement between the engagement projection and the engagement receiving member.

FIG. 7 is a cross-sectional view showing a first folding frame.

FIG. 8 is a cross-sectional view showing a second bending frame.

FIG. 9 is a cross-sectional view in a lateral direction showing a stacking state of the storage box in a folded state.

FIG. 10 is a longitudinal sectional view showing a stacking state of the storage box in a folded state.

FIG. 11 is a cross-sectional view showing a different embodiment of the hook portion of the slide plate of the engaging projection.

[Explanation of symbols]

 Reference Signs List 1 bottom plate 1a rising piece 2 long side wall 3 short side wall 4 first bending frame 5 second bending frame 6 first horizontal reinforcing frame 7 second horizontal reinforcing frame 8 corner member 21 first vertical reinforcing frame 31 second vertical Reinforcement frame 41 First bottom wall frame 42 First hinge part 43 First side wall lower frame part 48 Through cutout part 51 Second bottom wall frame 52 Second hinge part 53 Second side wall lower frame part 60 Engagement protrusion 61 First corner abutment plate 63, 64 Projection 70 Engagement receiving member 71 Second corner abutment plate 73, 74 Hole 75 Restriction wall 76 Notch 80 Slide plate 81 Hook 83 Finger hook 90 Lower corner member 91 Step

Claims (3)

[Claims] 1. A box-shaped frame in which side walls are arranged to face each other along four sides of a bottom wall and one of the side walls is sandwiched between the other side walls to form a box shape, and each side wall becomes a hinge. The side wall can be folded inside the bottom wall by the folding frame body connected to the bottom wall, and a releasable engaging projection that constitutes a corner member is provided at an upper part of a corner formed between the adjacent side walls. In a folding storage box in which an engagement receiving member is provided on an inner side wall on an outer side wall, a bending position of a hinge by the bending frame body is set to be smaller than a side wall on an outer side than an inner side wall. In addition to setting the height higher than the thickness of the side wall, the engaging receiver is provided with a hole for hooking on a side portion that is in contact with the adjacent outer side wall, and the inner surface orthogonal to the hole portion is provided. Is provided with a recess through the constraint wall that constitutes the side. The engaging projection has a projection which projects perpendicularly inward from a side wall to which the engaging projection is attached and which can be fitted into the hole, and is urged to return along the side wall. A foldable storage box, comprising a locking portion that slides and slides and protrudes into the concave portion to lock the restraining wall. 2. A bottom wall having a rectangular shape, short side walls facing each other along a short side, and long side walls facing each other along a long side to sandwich the short side wall. 2. A short-side wall is provided with an engagement receiving member at both ends of an upper edge of the short side wall, and an engagement protrusion is provided at both ends of the upper edge of the long side wall. Foldable storage box. 3. A lower corner member, which is fixed to the bottom wall side and serves as a guide when stacking a folded foldable storage box, is provided below a corner formed between adjacent side walls. The foldable storage box according to claim 1, wherein the foldable storage box is provided.