JPH0728005U - Folding case - Google Patents

Abstract

(57) [Summary] [Structure] A cylindrical main body composed of a front plate 1, a rear plate 2, and both side plates 3 is provided. An inner bottom plate 4 is provided below the front plate 1 and a tip is provided below the rear plate 2. The bottom plate 5 having the insertion piece 51 is formed with the lateral flaps 6 below both side plates 3, the inner bottom plate 4 is bent to the innermost side, and the lateral flap 6 is folded outside the inner bottom plate 4 to form the bottom plate 5. A folding case in which the insertion piece 51 of FIG. 1 is inserted between the lateral flap 6 and the inner bottom plate 4 and the bottom plate 5 is folded on the outermost side. [Effect] It is possible to mass-produce an assembly case that does not slip out,
Has the advantage of being able to wrap heavy contents with thinner sheets,
Since it can be folded after use, it can be discarded compactly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a folding case formed by folding and assembling a plastic sheet such as polyvinyl chloride, amorphous polyester, polypropylene, or polystyrene, or a composite sheet with paper.

[0002]

[Problems to be solved by conventional techniques and devices]

 The conventional folding case has a problem that the bottom part comes off or is damaged in the case of heavy contents, and as a method to solve them, the shape of the flap formed on the bottom part is devised and the flaps are combined when assembling the folding case. In addition, there is a structure in which overlapping parts are partially glued together, but it is an expensive case because the work of pasting glue is involved, and if the bottom shape is elongated, it is not possible to effectively combine the flaps. There are drawbacks.

[0003] Furthermore, a structure in which flaps are simply pasted with glue is difficult to glue with a uniform adhesive force, and there is a risk of slipping out. There is a case where it cannot be adhered. When the used case is discarded, it has a disadvantage that it is difficult to fold and bulky because it is in a container shape.

[0004]

[Means for Solving the Problems]

 The present invention solves the above problems and provides a plastic folding case having high bottom strength, which will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view showing an example of a blank sheet for assembling the folding case of the present invention, FIG. 2 is a perspective view of the folding case during assembling the blank sheet of FIG. 1, and FIG. It is an expanded sectional view of the bottom of a folding case in which a blank sheet is assembled.

As shown in FIGS. 1 to 3, the present invention has a cylindrical body composed of a front plate 1, a rear plate 2 and both side plates 3, and an inner bottom plate 4 and a rear plate 2 below the front plate 1. A bottom plate 5 having an insertion piece 51 at the tip below, and lateral flaps 6 formed below both side plates 3, and the inner bottom plate 4 is bent to the innermost side, and the lateral flap 6 is placed outside the inner bottom plate 4. The folding case is formed by folding and inserting the insertion piece 51 of the bottom plate 5 between the lateral flap 6 and the inner bottom plate 4, and folding the bottom plate 5 to the outermost side.

The folding case of the present invention is, for example, a single plastic sheet of polyvinyl chloride, polypropylene, polyester, polystyrene, polyethylene or the like, or a composite sheet with paper, and a material sheet having a thickness of about 0.2 to 0.5 mm. Can be preferably used.

As shown in FIG. 1, these material sheets are punched into a predetermined contour shape to form a blank sheet, and the front plate 1, the rear plate 2, both side plates 3 and the glue margin 31 are divided by the folding ruled lines 11. Then, each of the folding ruled lines 11 is bent and the glue margin 31 is adhered to the rear plate 2 to obtain a cylindrical body.

As shown in FIGS. 1 and 2, an upper lateral flap 32 is formed above the tubular main body so as to be continuous with the side plate 3, and the upper lateral flap 32 is first bent from a folding ruled line 11. Then, the lid plate 7 having the folding piece 71 at the front end formed on the rear plate 2 is folded over the horizontal flap 32, and the folding piece 71 is inserted into the gap of the horizontal flap 32 for sealing.

In the folding case of the present invention, an inner bottom plate 4 is provided below the front plate 1 and a bottom plate 5 having an insertion piece 51 at the tip is provided below the rear plate 2, as shown in FIG. The inner bottom plate 4 is first folded into the cylindrical main body, and then the left and right horizontal flaps 6 are formed into a cylinder. The inner bottom plate 4 is folded into the main body so that it overlaps with the outer side of the inner bottom plate 4, and the bottom plate 5 attached to the rear plate 2 is further folded. It is necessary to insert the insert piece 51.

Finally, the inner bottom plate 4 is pressed from the inside with contents, fingers, jigs, etc., and as shown in FIG. 3, the inner bottom plate 4, the insertion piece 51, the horizontal flap 6, and the bottom plate 5 are flattened in this order from the inside. The assembly of the bottom is completed by forming the laminated state.

In this case, when the folding ruled line 11 between the front plate 1 and the inner bottom plate 4 is made slightly shallower than the other ruled lines and the springback property is made large, the folded ruled line 11 is assembled as shown in FIG. It is preferable because the elastic recovery force sometimes pushes the insertion piece 51 from the inner surface to flatten the surface.

The folding case of the present invention thus obtained can be folded easily after use by removing the bottom plate 5 while pulling out the insertion piece 51, as opposed to when assembling.

It should be noted that this structure can be adopted not only below the folding case but also above it.

In the present invention, in order to punch out the contour shape of the sheet blank from the material sheet or to form the folding ruled line 11, a method of performing pressing at the same time or in sequence by a general Thomson type can be adopted.

[0016]

【Example】

 Using a hard polyvinyl chloride sheet with a thickness of 0.25 mm, create a blank sheet as shown in Fig. 1 to make a folding case with a length of 20 mm, a width of 70 mm, and a height of 100 mm. As a result, a plastic piece having a size of 18 × 60 × 95 mm and a weight of about 140 g was put in and taken out 10 times or more. As a result, the bottom did not come off, and there was no problem in use.

On the other hand, in a folding case having the same dimensions as those of the above-mentioned embodiment, the upper side shown in FIG. 1 was held downward, and a plastic piece having a size of 18 × 60 × 95 mm and a weight of about 140 g was put in and taken out. The upper cover plate 7 having the same sealing structure as the conventional bottom structure was detached by the operation.

[0018]

[Effect of device]

 As described above, the folding case of the present invention has a cylindrical body composed of a front plate, a rear plate, and both side plates, an inner bottom plate below the front plate, and an insertion piece at the tip below the rear plate. Form bottom flaps on both sides of the bottom plate, fold the inner bottom plate to the innermost side, fold the horizontal flap outside the inner bottom plate, and insert the bottom plate insert piece into the horizontal flap and the inner bottom plate. Since it is a folding case that is inserted in between and the bottom plate is folded to the outermost side, it is possible to mass-produce an assembly case that does not slip out of the bottom, and it has the advantage of being able to wrap heavy contents with thinner sheets, and it can be folded after use. Because it is possible, it can be discarded compactly.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a blank sheet for assembling the folding case of the present invention.

FIG. 2 is a perspective view of a folding case during assembly of the blank sheet of FIG.

FIG. 3 is an enlarged cross-sectional view of the bottom of the folding case in which the blank sheet of FIG. 1 is assembled.

[Explanation of symbols]

 1 front plate 2 rear plate 3 side plate 4 inner bottom plate 5 bottom plate 51 insertion piece 6 lateral flap

Claims (1)

[Scope of utility model registration request] 1. A cylindrical main body comprising a front plate, a rear plate, and both side plates, an inner bottom plate below the front plate, and a bottom plate below the rear plate having an insertion piece at the tip thereof. Form horizontal flaps below, bend the inner bottom plate to the innermost side,
A folding case in which the horizontal flap is folded outside the inner bottom plate, an insertion piece of the bottom plate is inserted between the horizontal flap and the inner bottom plate, and the bottom plate is folded to the outermost side.