JP2002225862A - Storing case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clear case capable of easily forming a gore part even a material has high rigidity or melting temperature and difficulty in temperature management in a solvent welding. SOLUTION: In a storing case 1 in which a first sheet 4 and a second sheet 3 are provided so as to oppose to each other, and a right side face part 30, a left side face part 31 and a lower side face part 32 are provided at the end parts of these sheets, ridged parts 30a, 31a and 32a and valley folding parts 30b, 31b and 32b are provided at the end parts of the second sheet 3, the end parts of the second sheet 3 which are extended from the valley folding parts 30b, 31b and 32b are projected from the mountain folding parts 30a, 31a and 32a, and the projection parts 30d, 31d and 32d are weld.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage case having a side portion called a gusset.

[0002]

2. Description of the Related Art Conventionally, in a case such as a clear case having a gusset, a vinyl chloride-based material is often used as the material, and a sheet made of such a material is thermally processed. Then, folds and joints of the gusset are provided. That is, in the conventional storage case, the ends of the sheet provided opposite to the front and back are welded by a method such as a high-frequency welder, and a fold is formed in the vicinity of the welded portion, and the welded portion is attached to the storage case. By folding it into the storage space, a side portion called a gusset is formed.

[0003]

However, when the welded portion is folded into the storage space as described above, the gusset, which is the folded portion, expands due to the elastic force of the material of the storage case. It becomes impossible to fold compactly.

On the other hand, in recent years, the use of vinyl chloride-based materials has been restricted from the viewpoint of environmental problems, and the use of olefin-based materials such as polyethylene and polypropylene as main materials has been required. I have. However, such olefin-based materials have a higher melting temperature than vinyl chloride-based materials, making it difficult to control the temperature during welding, etc. And the welding point is limited.

Accordingly, an object of the present invention is to provide a storage case that can easily form a gusset portion and be compactly folded even with a material that has a high melting temperature and is difficult to process. .

[0006]

That is, the present invention comprises sheets provided opposite to each other, and the ends of these sheets are respectively formed as ridges, and a space between these ridges is formed as a side portion. In the storage case, the other crest is provided so as to protrude from one crest, and the side surface portion and the sheet on the protruded crest side are joined.

As described above, since the peaks protruding from one of the peaks are joined, sandwiching for joining becomes easy, so that the joining operation can be easily performed without requiring fine work. become able to. Further, by joining the protruding ridges, the need for folding is eliminated, and the thickness of the storage case can be reduced.

In the case where the sheets are provided so as to face each other, the sheets may be formed as a single sheet and folded to produce the sheets. Alternatively, the sheets may be produced by joining different sheets. You may do it. In this case, by using different sheets, it is possible to select a sheet that has been colored or printed in a different color in advance or a sheet having a different pattern to form a storage case, thereby making it easier to change the design. Will be able to do it.

Further, such a sheet or the like is made of an olefin-based material, so that it is possible to cope with environmental problems related to disposal and the like.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of the storage case 1, and FIG. 2 shows a left side view thereof. FIG. 3 is a bottom view of FIG.

The storage case 1 includes a first sheet 4 and a second sheet 3 made of a thermoplastic resin, and the second sheet 3 has a right side 30 and a left side 31, a lower side The first sheet 4 and the second sheet 3 are provided with fastener portions 2 at the upper end portions thereof.
The inside thereof is used as a storage space S in which paper pieces and small articles can be stored.

The fastener portion 2 is made of an olefin-based material such as polyethylene or polypropylene in order to cope with environmental problems at the time of disposal or the like. The fastener part 2 can be opened and closed by sliding the slider member 2b sandwiching the. That is,
By sliding the slider member 2b, opposed grooves 2c provided in the pair of transparent films 2a are provided.
The fastener portion 2 can be opened and closed by elastically fitting or releasing the fitting. The fastener portion 2 is attached to the first sheet 4 and the second sheet 3 forming the front and back sides, and the upper end portions of the first sheet 4 and the second sheet 3 are subjected to heat processing, respectively. The transparent film 2a is welded.

The first sheet 4 and the second sheet 3 to which the fastener 2 is attached are made of an olefin-based material such as polyethylene or polypropylene, similarly to the transparent film 2a in the fastener 2.
A first sheet 4 forming one wall surface of the storage space S,
A second sheet 3 provided opposite to the first sheet 4, and a right side section 30, a left side section 31, and a lower side section 32 are provided at an end of the second sheet 3. It is like that.

The first sheet 3 is formed in a horizontally long rectangular shape so as to form one surface of the storage space S, and its left and right lengths are substantially the same as the left and right widths of the fastener 2. The transparent film 2a of the fastener portion 2 can be welded to the upper end thereof. On the other hand, the second sheet 3 provided opposite to the first sheet 4 is constituted by a sheet that is separate from the first sheet 4, and thus, the first sheet 4 and the By configuring the second sheet 3 separately, for example, the colors and patterns of the first sheet 4 and the second sheet 3 are changed, so that the design can be easily changed. In this embodiment, a case will be described in which the first sheet 4 and the second sheet 3 are configured separately, but the present invention is not limited to this, and the sheets are opposed by punching out one sheet. You may comprise a sheet.

In this embodiment, the right side portion 30 and the left side portion 31 of the second sheet 3 have a mountain fold 30 bent from the end of the second sheet 3 toward the storage space S.
a, 31a, and valley folds 30b, 31b formed by further bending the second sheet 3 folded by the mountain folds 30a, 31a toward the storage space side, and furthermore, the valley folds 30b, 31b The distal end side of the second sheet 3 extending from the ridges 30a, 31a is protruded from the ridges 30a, 31a to provide protruding portions 30d, 31d.
Similarly, a lower side surface portion 32 provided below the second sheet 3 is welded to a lower end portion of the second sheet 3 to form a mountain fold portion 32a and a valley fold portion 32b. 3
2b extending from the front end side of the second sheet 3
The projecting portion 32d is provided so as to project beyond 2a. On the other hand, a boundary portion 33 between the right side portion 30 and the left side portion 31 and the lower side portion 32 has a V-shaped bent portion 3 formed by bending both end portions of the lower side surface 32 outward in a substantially V shape.
2c is provided to provide a valley fold 30 of the right side 30 and the left side 31.
b, 31b are folded in preferentially, the boundary 33 between the right side portion 30 or the left side portion 31 and the lower side portion 32 is welded, and the welded portion is positioned on the storage space S side. I have. Also, the second sheet 3 includes
Like the first sheet 4, a transparent sheet 2a constituting the fastener member 2 is welded to the upper end side via a welding portion 2d, and is provided at the upper end of the transparent sheet 2a and the first sheet 4. In the state where the slider member 2b is attached to the transparent sheet 2a, the first sheet 4, the second sheet 3, and the transparent sheet 2a welded to these sheets are attached by welding as described below. .

That is, when welding the first sheet 4 and the second sheet 3 provided opposite to each other, first,
The transparent film 2a of the fastener 2 is welded to the first sheet 4 and the second sheet 3. Next, the lower side portion of the first sheet 4 is welded to the lower side protruding portion 32d of the second sheet 3, and the right side portion 30 and the left side portion and the lower side portion 32 of the second sheet 3 are further welded. Is welded. Then, the first sheet 4 and the second sheet 3 are turned over so that the welded boundary portion 33 is positioned on the storage space S side. Then, in a state where the boundary portion 33 is positioned on the storage space S side, the protruding portions 30 d and 31 d which are the edges of the second sheet 3 are positioned on the edges of the first sheet 4, and A welding device (not shown) is pressed against 30d and 31d. Then, by applying ultrasonic waves to the welding device, heat is generated at the protruding portions 30d and 31d and the end of the first sheet 4, and the contact portions are welded to form a peak. Then, the welding portion 6 for releasing the residual heat by releasing the sandwiching of the welding device and appropriately increasing the strength of the storage case in the vicinity of the fastener portion 2 is provided.
The storage case 1 is configured by providing the above.

As described above, according to the present embodiment, the right side portion 30, the left side portion 31, and the lower side portion 32 are provided at the ends of the first sheet 4 and the second sheet 3 provided opposite to each other. In the storage case 1 formed as described above, the end portions of the second sheet 3 are provided with mountain fold portions 30a, 31a, 32a and valley fold portions 30b, 3b.
1b, 32b, and the valley folds 30b, 31
b, 32b, the end of the second sheet 3 protrudes from the mountain folds 30a, 31a, 32a so that the protruding portions 30d, 31d, 32d are welded. Even in the case of using a system material, the welding operation becomes very simple.
Further, since the inner contact surfaces of the protruding portions 30d, 31d, and 32d of the first sheet 4 and the second sheet 3 are welded in this manner, the tangent angle of the welded portion on the storage space S side becomes acute. Thus, the swelling of the welded portion can be reduced.

Further, since the first sheet 4 and the second sheet 3 are constituted by different sheets, it is possible to easily select a sheet colored in a different color in advance to easily improve the design. become able to.

The present invention is not limited to the above embodiment, but can be variously modified. For example, in the above embodiment, the storage case 1 is made of an olefin-based material.
However, the present invention is not limited to this, and may be made of conventional vinyl chloride or the like in order to simplify the manufacturing process only. In the above embodiment, one valley fold 30b, 31b, 32b is provided, and the tip end extending from the valley fold 30b, 31b, 32b is provided to protrude from the mountain fold 30a, 31a, 32a. The present invention is not limited to this, and a plurality of valley folds 30b, 31b, and 32b may be provided to provide a bellows-like side surface. Furthermore, in the above-described embodiment, the method of ultrasonic welding has been described as a specific example of the joining method. However, the present invention is not limited to this, and the opposite sheets are joined by adopting another joining method. Is also good.

[0020]

The present invention is embodied in the form described above, and has the following effects.

That is, the storage case according to the present invention is a storage case comprising sheets provided to face each other, and an end portion of each of the sheets having a peak portion, and a space between these peak portions as a side portion. In the case, the other ridge is provided so as to protrude from one ridge, and the side surface on the side of the protruding ridge is joined to the sheet. This makes it possible to easily perform the joining operation without requiring any additional work. Further, folding after welding is not required, and the thickness of the storage case can be reduced.

Further, since the sheets are formed of different sheets facing each other as described above, it is possible to more easily design by selecting and configuring a sheet colored in a different color or a sheet having a different pattern in advance. Can be changed.

Further, since such a sheet or the like is made of an olefin-based material, it is possible to cope with environmental problems such as disposal.

[Brief description of the drawings]

FIG. 1 is a front view of a storage case according to an embodiment of the present invention.

FIG. 2 is a left side view of the storage case in the same embodiment.

FIG. 3 is a bottom view of the storage case in the same embodiment.

FIG. 4 is an AA end view of FIG. 1 in the same embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Storage case 3 ... 2nd sheet 4 ... 1st sheet 30 ... Side part (right side part) 30a ... Crest part (mountain fold part) 30d ... Crest part ( 31 ... side surface (left side surface) 31a ... mountain (mountain fold) 31d ... mountain (projection) 32 ... side surface (lower side) 32a ... mountain (Mountain fold) 32d ... mountain (projection)

Claims (6)

[Claims] 1. A storage case comprising a sheet provided oppositely, and an end portion of each of the sheets as a peak portion, and a space between the both peak portions as a side portion, wherein the one peak portion is provided. A storage case, wherein the other ridge is provided so as to protrude, and the side surface of the protruded ridge is joined to a sheet facing the side. 2. The storage case according to claim 1, wherein the oppositely provided sheets are formed of different sheets. 3. The storage case according to claim 1, wherein the opposed sheet and the side surface are made of an olefin-based main material. 4. A method for manufacturing a storage case, comprising: a sheet provided opposite to a sheet, and an end portion of each of the sheets being a peak portion and a side portion provided between the peak portions. A method for manufacturing a storage case, comprising: projecting another peak from a peak, and joining the side face on the protruding peak side to a sheet facing the side face. 5. The method for manufacturing a storage case according to claim 4, wherein said opposed sheets are formed of different sheets. 6. The method of manufacturing a storage case according to claim 4, wherein the opposed sheet and the side surface are made of an olefin-based main material.