JPH0323420B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <<Industrial Application Field>> The present invention relates to a foldable box using board materials such as plastic board, cardboard, plastic cardboard, and plywood.

<<Prior Art and Its Disadvantages>> Various foldable boxes have been proposed to save storage space when not in use and to improve transportation efficiency.

Among these boxes, the folding method is as follows: Among the four side plates set up on the bottom plate, one pair of the toe sides can be rotated by a hinge connected to the other, and the other is divided into two parts and hinged together. It is known that the device is folded inward to fit the size of the bottom plate by connecting side plates.

Another typical manufacturing method for this type of folding box is plastic injection molding.
There is a method in which hinges and joints are integrally formed on the edges of the bottom plate, side plates, flap plates, top frame, etc., and these are assembled into a box.

However, parts formed by injection molding have complicated structures, expensive injection mold costs, and the size of the box is limited to the size of the injection molded product. There were fundamental problems, such as the inability to meet demands for size.

Therefore, the present inventors have developed a foldable box with a new and practical configuration that can solve the above problems, that is, the size of the box can be freely selected in terms of length, width, depth, etc., and can be stacked. With the aim of providing a box, the present invention was completed after intensive study.

<<Means for solving the problem>> The present invention for achieving the above object includes a bottom plate,
In a collapsible box that includes a pair of side plates and a flap plate that stand upright around the four circumferences of the bottom plate, and a reinforcing frame that is fitted around each of the four circumferences of the bottom plate, the side plates, and the flap plate, at least one of the side plates It is divided into two in the vertical direction, and the divided parts and the joints with the edges of the bottom plate are hinged, and the reinforcing frames provided on the side plates and the tilting plate are connected to each other at the orthogonal corners. A pair of corner members that engage with each other are provided, and a connecting shaft bent in triaxial directions is interposed between the corner members and has a pair of upper and lower horizontal shaft portions extending perpendicularly to both ends of the vertical shaft portion. Further, the upper horizontal shaft portion was loosely fitted into the corner member on the side of the tilting plate, and the lower horizontal shaft portion was loosely fitted on the corner member on the side plate side.

<<Function>> According to the foldable box having the above configuration, the corner member is divided into two parts, and a connecting shaft serving as a rotating shaft is interposed inside. After rotating the fixed tilt plate in the horizontal direction around the upper horizontal shaft to make it parallel to the bottom plate, fold the hinged side plates inward and attach the lower horizontal axis of the corner member fitted to the upper part of the side plates. Folding is possible by rotating horizontally around the part so that it is parallel to the bottom plate.

<<Example>> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show an embodiment of a collapsible box according to the invention.

The box shown in this embodiment has a rectangular bottom plate 12, a side plate 1, and a rectangular bottom plate 12, as shown in FIG.
4, and a tilt plate 16, and each of these plates 12, 14, 16 has a reinforcing frame 12 around each of the four circumferences.
a, 14a, and 16a are fitted and fixed.

Two pieces of the same shape are used for each of the side plates 14 and the tilting plates 16, and the pair of side plates 14 are placed on the outside of the long sides of the bottom plate 12, and the pair of tilting plates 16 are placed on the short sides of the bottom plate 12. Each box is erected on the outside of the box to form a box with an open top.

The side plate 14 is divided into upper and lower parts on an arbitrary axis in the longitudinal direction, and the divided upper and lower side plates 14b, 1
4c, as shown in FIG. 2a, is configured such that hinge parts 18 made of synthetic resin having bending flexibility are formed and fixed along the dividing line so that each part can be folded inwardly in two. ing.

Furthermore, a step portion that engages with the respective reinforcing frames 14a, 14a is provided at the joint portion of the upper and lower side plates 14b, 14c.

The lower plate 14c and the bottom plate 12 are coupled as shown in FIG. 2b.

That is, at the corner where the lower plate 14c and the bottom plate 12 intersect at right angles, an L-shaped synthetic resin hinge part 20 having bending flexibility is formed and fixed from the inner side, spanning the respective reinforcing frames 14a and 12a. There is.

In addition, each of the tilting plates 16 and the bottom plate 12 are connected to the reinforcing frame 1 below the tilting plate 16, as shown in FIG. 2c.
6a and the reinforcing frame 12a of the bottom plate 12 are provided with key-shaped portions that engage with each other, and when the tilting plate 16 is rotated inward, this engagement state is released and the gate plate 16 is separated from the bottom plate 12.

Furthermore, as shown in FIG. 2d, a key-shaped engagement portion is provided at the orthogonal side of each upper side plate 14b and the tilting plate 16 between the reinforcing frames 14a and 16a that abut each other. When the tilting plate 16 is rotated inward in the same manner as described above, this engaged state is released.

On the other hand, first and second corner members 26 and 28 are fixed to four corners where the side plate 14b and the tilting plate 16 intersect at right angles on the upper end side.

These corner members 26, 28 have a cross-sectional shape as shown in FIG. 3e, and have outer sides 26a,
28a, inner plates 26b, 28b, upper plates 26c, 28c connecting these, and protruding pieces 26d, 28d projecting on the upper plates 26c, 28c,
A side plate 1 is installed between the inner and outer plates 26a and 28b, respectively.
4. The reinforcing frames 14a and 16a of the tilt plate 16 are fitted and fixed.

Furthermore, the first and second corner members 2
Between 6 and 28, there is a connecting shaft 3 as shown in Fig. 3d.
0 is inserted.

The connecting shaft 30 shown in the figure has a vertical shaft (Z-axis) portion 3.
A pair of upper and lower horizontal shaft portions (X, Y axes) 30d, 30c are provided at both ends of 0a, extending in a perpendicular direction, and are bent in three axes (X, Y, Z axes). 30b is loosely fitted into the sleeve 32 fixed to the reinforcing frame 28a in the second corner member 28,
A stopper 34 is attached to the rear end.

The vertical shaft portion 30a of the connecting shaft 30 is located substantially vertically between the corner members 26 and 28, and the lower horizontal shaft portion 30c is loosely fitted into a sleeve 36 provided on the first corner member 26 side. It is fixed with a stopper 38.

The stoppers 34, 38 attached to the upper and lower horizontal shafts 30b, 30c are, for example, snap springs or non-return washers, and the fixing positions of the stoppers 34, 38 are fixed at the respective sleeves 32, 36.
The horizontal shaft portions 30b and 30c loosely fitted in the horizontal shaft portions 30b and 30c are allowed to slightly slide along the axial direction.

Now, in the box of this embodiment constructed as described above, each plate 12, 14, 1
By engaging the reinforcing frames 12a, 14a, and 16a of No. 6, respectively, a box as shown in FIG. 1 with an open top end is assembled.

In this case, each reinforcing frame 12a, 14 except between the reinforcing frames 14a, 12a between the lower side plate 14c and the bottom plate 12
Since a and 16a are mutually fitted or engaged in a key shape, the load on the hinge portion is reduced when stored items are placed, and durability is improved.

Then, in the assembled box, as shown in FIG. Rotate it upward so that it is almost parallel to the bottom plate 12. After that, by folding the side plate 14 inward and rotating it outward about the lower horizontal shaft portion 30c of the connecting shaft 30, the side plate 14 is folded in half onto the bottom plate 12, as shown in FIG. 4b. The side plates 14 and the tilt plate 16 can be folded in a stacked state.

In the above embodiment, the side plate is divided into upper and lower halves as shown in Fig. 1, and the pair of gate plates can be folded in the same plane in the longitudinal direction of the bottom plate, but when constructing a deep box. In this case, the number of divisions of the side plates should be increased, or the starting point and intermediate point of the bending by the hinge should be shifted from each other on the sides of the pair of side plates, and the position of the upper horizontal shaft that locks the tilting plate should be changed between the pair of sides. A box with the desired depth can be obtained by changing the length of the swivel plates mutually, that is, by changing the length of the Z-axis so that the swivel plates are folded so that they overlap one another.

<<Effects of the Invention>> As explained in detail above, the foldable box of the present invention is made of a relatively thin plastic board, corrugated board, plastic cardboard, plywood, etc., whose edges are reinforced with a reinforcing frame to reduce weight. The box is lightweight and strong because it is made of plate material and is foldable by plastic hinges and connecting shafts of corner members, and the reinforcing frames engage with each other when assembled. Furthermore, since the plate material and reinforcing frame are used in combination with continuous elongated objects, a box of any size can be obtained without being limited in size unlike conventional folding boxes made by plastic injection molding. In addition, the box of the present invention has fewer parts that make up the box than conventional products, and the manufacturing cost of reinforcing frames etc. can be made at a low cost by extrusion, so the assembly cost and parts cost can be reduced, making it an extremely new box. It's practical. Furthermore, since the corner members have a rising edge, the stacked state is also stable.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the box according to the present invention in an assembled state;
FIG. 2 is a cross-sectional view of the main part of FIG. 1, FIG. 3 is an explanatory diagram showing the arrangement relationship between the corner members and the connecting shaft, and FIG. 4 is an explanatory diagram of the folding process of the box. 12... Bottom plate, 12a... Reinforcement frame, 14... Side plate, 14a... Reinforcement frame, 16... Tilt plate, 16
a... Reinforcement frame, 26, 28... First corner member, 30... Connection shaft.

Claims (1)

[Scope of Claims] 1. A device comprising a bottom plate, a pair of side plates and a gate plate that are installed upright around the four circumferences of the bottom plate, and a reinforcing frame that is fitted around each of the four circumferences of the bottom plate, the side plates, and the cover plate. In the foldable box, the side plate is divided into at least two parts in the vertical direction,
A pair of corner members that hingely connect the divided portion and the joint portion with the end edge of the bottom plate, and engage with each other at respective corners where reinforcing frames provided on the side plate and the tilt plate intersect at right angles. A connecting shaft bent in three axial directions and having a pair of upper and lower horizontal shaft parts extending perpendicularly to both ends of the vertical shaft part is interposed between the corner members, and the upper horizontal shaft The foldable box is characterized in that the lower horizontal shaft portion is loosely fitted into the corner member on the side plate side, while the lower horizontal shaft portion is loosely fitted on the corner member on the side plate side.