JPH082524A - Foldable box - Google Patents

Abstract

PURPOSE:To provide a foldable box which can be quickly built up even when being formed of a light material, and for which the height of side plates can be set higher than a conventional height. CONSTITUTION:A foldable box has a bottom plate and four side plates 3, 3, 4, 4, and the two side plates 3, 3 are turnable to the inside of the box 1 with an internal folding line 14a as the folding center. Then, remaining two side plates 4, 4 are formed into a so-called folding screen structure with inward folding lines 14b, 14c and an outward folding line 14d, and are bendable in the height direction to form the foldable box 1. For such a box 1, an engaging part 20 which is tractive to the outside is formed on the side plates 4, 4 of the folding screen structure, and the bent side plates 4, 4 are forcibly erected by the engaging part 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box which can be folded into a flat and compact shape from a state of use.

[0002]

2. Description of the Related Art Conventionally, there is one bottom plate and four side plates,
Of the side plates, two facing side plates are rotatable inside the box around the upper edge as a bending center, and the remaining two side plates have a so-called folding screen structure and are bendable in the height direction. A box is disclosed, for example, in Japanese Utility Model Publication No. 62-110132. This foldable box, when assembled from a flat folded state to a use state, lifts the upper edge of the box to vertically raise the side plate of the folding screen folding structure and the two remaining side plates to stand up, and both side edges of the side plate. The folding part of the side plate of the folding screen was locked from the inside.

[0003]

The above-mentioned conventional box has a structure in which the weight of the bottom plate and the side plates is used when the side plates of the folding screen are raised vertically. Since the side plates are difficult to stretch and the box has to be vigorously shaken up, down, left and right to promote the movement of the side plates, there is a problem that the efficiency of the assembling work is very poor. Further, when the above-mentioned folding structure is adopted in the deep box, the side plates of the folding screen folding structure are folded and folded in a folded state as shown in FIG. In many cases, it did not move any further, and it was unfit for practical use. Therefore, the current box is
The folding plate is limited to a depth such that the folding side panels do not overlap each other.

The present invention has been made in view of the above problems, and an object of the present invention is to fold it so that it can be quickly assembled even if it is made of a light material and that the height of the side plate can be set higher than before. To provide a possible box.

[0005]

In order to achieve the above-mentioned object, the present invention has a bottom plate and four side plates, and two of the side plates facing each other are inside the box with their edges as bending centers. In a foldable box in which the two remaining side plates are freely rotatable and have a so-called folding screen folding structure and can be bent in the height direction, a hooking portion that can be pulled outward is formed on the side plate having the folding screen folding structure. Then, a foldable box is provided in which the bent side plate is forcibly raised by the hook portion.

[0006]

[Function] The bent side plate can be forcibly made to stand straight up by the hook portion provided on the side plate having the folding screen folding structure. Therefore, the side plate having the folding screen folding structure quickly rises at a stretch, which improves the efficiency of the assembling work. Further, even if the ends of the side plates of the folding screen folding structure are folded in the folded state by making the box deep, interference between the side plates does not become an obstacle by forcibly pulling the side plates.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of the box, FIG. 2 is a perspective view of the box in a folded state, FIG. 3 is an end view taken along line XX of FIG. 1, and FIG. 4 is a Y of FIG. 1 including an enlarged view Z2 of Z1. -Y line end view, FIGS. 5A and 5B are partially enlarged sectional views of the box, FIG. 6 is a perspective view of the bottom plate, FIG. 7 is an exploded perspective view showing the side plate on the rotating side, and FIG. 8 is a folding screen. It is a disassembled perspective view which shows the side plate of a folding structure.

The box 1 has a rectangular bottom plate 2 in plan view, two rotatable side plates 3 and 3 located on two opposite sides of the bottom plate 2, and the remaining two sides of the bottom plate 2. The two side plates 4 and 4 having a folding screen structure, the molding members 5a to 5c that cover the ends of the side plates 3 and 4, and the corner members 6 that connect the side plates 3 and 4 and the handles provided to the side plate 3. And the member 7.

The material forming the bottom plate 2 and the side plates 3 and 4 is a well-known plastic corrugated board in which a polypropylene core member 8c is integrally molded between two polypropylene substrates 8a and 8b. As shown in FIG. 6, the bottom plate 2 has fixed vertical plates 9 formed at both ends in a direction orthogonal to the core member 8c. The vertical plate 9 is obtained by thermally deforming the both ends of the bottom plate 2 at a right angle, and has a long hole-like locking portion 10 in which two sets are arranged on the left and right sides and two columns are formed on the upper and lower sides in total. , 10 ...

As shown in FIG. 7, the side plate 3 is formed by laminating two pieces of plastic corrugated board 3a, 3b so that the core member 8c faces the vertical direction. As shown in the enlarged view Z2 of FIG. 4, the plastic cardboard 3a on the inside has a folding piece 13 folded over with the single substrate 8a as a hinge portion, and a molding member made of synthetic resin at the upper edge thereof. 5a
Is fitted. A cutout recess 21 is formed in the center of the portion where the two bent pieces 13 are overlapped, and the handle member 7 is fitted into the cutout recess 21. Further, an inner folding curve 14a is formed on the upper end of the inner plastic corrugated cardboard 3a along the lower edge of the molding member 5a, leaving a single substrate 8b, and the remaining substrate 8b serves as a hinge portion. Then, the side plate 3 rotates toward the inside of the box 1. The inward folding curve 14a is displaced in the height direction between the left and right side plates 3, 3 as shown in FIG. Due to this displacement, when the side plate 3 is rotated to the horizontal position as shown by the alternate long and short dash line in FIG. On the other hand, the core member 8c is provided at the lower edge of the plastic cardboard 3a.
The reinforcing band 11 is provided in a direction orthogonal to the. The lower end of the reinforcing strip 11 of this embodiment is bent at a substantially right angle in the same manner as the vertical plate 9 of the bottom plate 2. In addition, the reinforcement belt 11
As shown in FIGS. 5 (b) and 7, the projecting piece-shaped engaging portions 12 and 12 that engage with the lower engaging portions 10 and 10 of the vertical plate 9 of the bottom plate 2 are formed on the base plate 2. There is.

Also, the outer plastic cardboard 3b
Is affixed to the outer surface of the plastic corrugated cardboard 3a below the bent piece 13, and reinforcing molding members 5b and 5b are fitted and fixed together with the plastic corrugated cardboard 3a on both vertical edges. Since the side plate 3 configured as described above has a structure in which the molding members 5b and 5b are integrated in addition to the double structure of the plastic corrugated boards 3a and 3b, the compression strength is remarkably high.

As shown in FIGS. 5 (a) and 5 (b), the handle member 7 has a crank shape in cross section. The upper part of the crank is the insertion part 15, and the lower part is the inward claw pieces 16, 16. The finger hooks 17 are provided at both ends. The handle member 7 is fixed by fitting the insertion portion 15 into the cutout recess 21 of the side plate 3 and further heat-sealing the molding member 5a and the insertion portion 15.

Next, as shown in FIG. 8, the side plate 4 of the folding screen is made of plastic cardboard with the core member 8c oriented in the vertical direction. The reinforcing plate overlaps the bottom plate 2 below. Two side plates 4 and 4 are connected integrally via 19. On the upper edge of the side plate 4, a molding member 5c,
5c is fitted, and an inward folding curve 14b is formed along the outer lower edge of the molding member 5c. The inward folding curve 14b is cut by leaving a single inner substrate 8b of plastic corrugated board, and the remaining inner substrate 8b serves as a hinge portion. This inner folding curve 14b
An inner folding curve 14c having the same structure as the above is formed at the boundary between the side plate 4 and the reinforcing plate 19. Further, the side plate 4 is further provided with a horizontal outer folding curve 1 which is cut out at the center of the both inner folding curves 14b and 14c with one outer substrate 8a left.
4d is formed. Side plate 4 configured as described above
Are connected to the bottom plate 2 by adhering a reinforcing plate 19 to the lower surface of the bottom plate 2. The side plates 3 are arranged on the two sides of the bottom plate 2 on which the vertical plates 9 are provided, and the corner members 6 are fitted in the abutting portions of the side plates 4 to fix the rivets, so that the uppermost inward folding curve is formed. Side plate 4 at a portion above 14a and 14b
Is united with.

Thus, the side plate 4 of the folding screen has the following structure.
A semi-doughnut-shaped hooking portion 20 made of a synthetic resin is heat-sealed on the outer surface and above the outer folding curve 14d. The hook portion 20 is in a state in which only the linear upper half portion is heat-sealed, and the arc-shaped lower half portion can be freely turned. If the lower half portion is hooked with a finger, the side plate 4 can be pulled outward. You can In addition,
The hooking portion 20 is not limited to the structure in which the synthetic resin component is heat-sealed. For example, the hook 20 may be punched in the side plate 4 in the form of a through hole. Further, the attachment position of the hooking portion 20 may be below the outer folding curve 14d.

Next, the method of folding and assembling the box of the present invention will be described. First, in the state where the box 1 is flatly folded as shown in FIG. 2, the side plates 4 and 4 are folded in two and the upper surface of one side plate 4 is overlapped with the other side plate 4 as shown by the chain double-dashed line in FIG. Further, the side plates 3 and 3 are folded on the side plates 4 and 4 in a state as shown by the alternate long and short dash line in FIG.
Further, the inward claw pieces 16, 16 of the handle member 7 are engaged with the upper engagement portions 10, 10 of the bottom plate 2. Box 1 from this state
1 is assembled into the state shown in FIG. 1, first, the handle member 7 of the box 1 is opened to the outside and lifted up. Then, the inward claw pieces 16, 16 of the handle member 7 are disengaged from the upper engaging portions 10, 10 of the bottom plate 2, the bottom plate 2 is lowered, and the side plates 4, 4 are slightly extended. In this state, when a finger is hooked on the hook portion 20 of the side plates 4 and 4 and pulled outward, the side plates 4 and 4 stand upright. As a result, the side plates 3 and 3 that have lost their support stand up by their own weight, and the molding member 5b of the side plates 3 and 3 comes into contact with the inside of the outer folding curve 14d of the side plates 4 and 4 so that the side plates 4 and 4 are straightened. Lock it. Then, the engaging portion 1 of the side plates 3 and 3
When the boxes 2 and 12 are inserted into the lower engaging portions 10 of the vertical plate 9 of the bottom plate 2, the box 1 is assembled as shown in FIG.

In this state, as shown in FIG. 5B, the engaging portion 12 of the side plate 3 is engaged with the lower engaging portion 10 of the vertical plate 9.
Since the side plate 3 suspends and supports a part of the load applied to the bottom plate 2 because it is engaged with, it does not break even if a heavy load is put into the box 1 and lifted. Further, as is well known, the plastic corrugated cardboard exhibits excellent strength in the force acting in the direction parallel to the core member 8c. In the box 1 of the present invention, since the side plates 3 and 4 are formed so that the core member 8c is vertical, the box 1 does not collapse even if a considerable load is applied to the box 1. Therefore, the boxes 1 can be stacked in multiple layers. Further, as in the present embodiment, if the bottom plate 2 and the core members 8c of the reinforcing plate 19 are stacked so as to be orthogonal to each other, the strength of the box bottom is also satisfactory.

Next, when folding from the assembled state to the flat state, first, the side plates 3 are rotated inside the box 1 as indicated by the alternate long and short dash line in FIG. Then, the side plates 4 and 4 having the folding screen folding structure are released from the lock and naturally bend from the inner folding (outer folding) folding curves 14b to 14d, so that if they are pressed as they are, they can be folded into a flat state as shown in FIG. Then, when the molding member 5a of the side plates 4 and 4 is further pushed in from above, the inwardly facing claw pieces 16 and 16 of the handle member 7 are fitted into the upper locking portions 10 and 10 of the vertical plate 9 of the bottom plate 2 and are stabilized.

The present invention has been described with reference to the embodiments.
Of course, the present invention is not limited to the above embodiment. For example, the number of bends of the side plates 4 and 4 having the folding screen structure may be any number.

[0018]

In the foldable box of the present invention, since the side plate of the folding screen folding structure can be forcedly raised by the hook portion provided on the side plate, the efficiency of the assembling work can be greatly improved. . Such an effect is particularly remarkable when the box is made of a light material such as the plastic corrugated cardboard shown in the embodiment. In addition, even if the ends of the side plates having the folding screen folding structure are folded and folded in a folded state, and the dimensions are such that they interfere with each other during assembly, the obstacles due to the interference can be easily cleared by forcibly moving the side plates. Therefore, there is an effect that the folding structure can be applied to a deep box which was not suitable for practical use in the past.

[Brief description of drawings]

FIG. 1 is a perspective view of a box.

FIG. 2 is a perspective view of the box showing a folded state.

FIG. 3 is an end view taken along line XX of FIG.

FIG. 4 is an end view taken along line YY of FIG. 1 including an enlarged view Z2 of Z1.

5 (a) and 5 (b) are partially enlarged sectional views of a box.

FIG. 6 is a perspective view of a bottom plate.

FIG. 7 is an exploded perspective view showing a side plate on a rotating side.

FIG. 8 is an exploded perspective view showing a side plate having a folding screen structure.

[Explanation of symbols]

 1 ... Box 2 ... Bottom plate 3,3 ... Side plate 4,4 ... Side plate with folding screen 20 ... Hooking part

Claims (1)

[Claims] 1. A bottom plate and four side plates, of which two facing side plates are rotatable inside the box with an edge as a bending center, and the remaining two side plates are a so-called folding screen structure. In a foldable box that is bendable in the height direction, a side wall having the folding screen folding structure is formed with a hooking portion that can be pulled outward, and the bent side wall is forcibly raised by the hooking portion. A foldable box characterized by doing so.