JP2002128073A - Case and manufacturing method thereof - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a case in which a bag portion can be easily formed and the bag portion is less likely to cause water leakage. SOLUTION: A clear case 10 includes a bag portion 12 made of a synthetic resin. The bag section 12 includes a strip-shaped bottom member 14. Surface members 16, 18 and bottom gore portions 20a, 22a
Extend from the four ends of the bottom member 14. The side gore portions 20b, 20c, 22b, 22c are face members 1
6, 18 are formed to extend from both side ends. Bottom gore part 2
0a, 22a and side gore portions 20b, 20c, 22
The lower ends of b and 22c are welded. Side gore portion 20b,
The side ends of 20c, 22b, 22c are welded together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case and a method of manufacturing the same, and more particularly to a case in which a bag portion made of a synthetic resin includes a bottom member and a gore member, and a method of manufacturing the same.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view showing an example of a conventional clear case. The clear case 1 shown in FIG. 6 includes a bag 2 made of a transparent synthetic resin. The bag portion 2 includes a strip-shaped bottom member 3. At both ends in the width direction of the bottom member 3,
The lower ends of the rectangular surface members 4a and 4b are connected to each other. In addition, one end of the bottom member 3 in the longitudinal direction, one end of the surface member 4a, and one end of the surface member 4b include
The gore member 5a is connected. Further, the other end of the bottom member 3 in the longitudinal direction, the other end of the surface member 4a, and the surface member 4
The gore member 5b is connected to the other end of the b. A fastener 6 made of a synthetic resin is attached to the upper opening of the bag 2. Both ends of the upper part of the bag part 2 are face members 4.
The gore members 5a and 5b are welded in a folded state between a and 4b. In order to manufacture the clear case 1 shown in FIG. 6, first, as shown in FIG. 7, the bottom member 3, the surface member 4a, and the gore members 5a and 5b are integrally formed in a developed state. Then, as shown in FIG.
Are welded to both ends in the longitudinal direction and the lower ends of the gore members 5a and 5b. Further, the ends of the bottom member 3 and the gore members 5a and 5b are welded to the larger surface member 4b, and three sides of the welded portion of the surface member 4b are cut. Thereby, the bag part 2 is made. Then, both upper ends of the bag 2 are welded. Most of the fastener 6 is welded to the surface members 4a and 4b before the bag portion 2 is made,
When the upper ends of the bag 2 are welded together, the fastener 6
Is completely welded.

[0003]

However, according to the above-mentioned conventional technique, the bag portion 2 of the clear case 1 is formed.
Welding the bottom member 3 and the gore members 5a and 5b;
Two welding steps of welding the bottom member 3, the gore members 5a and 5b and the surface member 4b are required, and the manufacturing process is complicated. Further, in the above-described conventional technique, since the three ends of the bottom member 3 serving as the bottom of the bag portion 2 of the clear case 1 are welded to the surface member 4b and the gore members 5a and 5b, at least the welded portions thereof are provided. When a part comes off,
When a wet towel or swimsuit is put in the bag 2, the bag 2 leaks water.

[0004] Therefore, a main object of the present invention is to provide a case in which the bag can be easily formed and the bag does not easily leak. Another object of the present invention is to provide a case manufacturing method for manufacturing a case in which a bag portion can be easily formed and the bag portion is less likely to leak water.

[0005]

A case according to the present invention is a case including a bag portion made of a synthetic resin, wherein the bag portion extends from a strip-shaped bottom member and one end in the width direction of the bottom member. One surface member formed in a rectangular shape, another rectangular surface member formed extending from the other end in the width direction of the bottom member, one end portion in the longitudinal direction of the bottom member, and one surface member One gore member connected to one side end and one side end of the other surface member, the other end in the longitudinal direction of the bottom member, the other side end of one surface member, and the other side member of the other surface member. The other gore member is connected to the other end, and the one gore member is formed with a bottom gore portion extending from one end in the longitudinal direction of the bottom member, and one side end of the one surface member. And the other surface member is formed so as to extend from one side end, and the lower end is formed at the upper end of the bottom gore portion. The other gore member is formed so as to extend from the other end in the longitudinal direction of the bottom member, and the other gore portion is formed. Two other sides formed so as to extend from the other end of the surface member and the other end of the other surface member, the lower end is welded to the upper end of the bottom gore portion, and the side ends are welded to each other. This is a case including a gore portion. The method for manufacturing a case according to the present invention is a method for manufacturing a case for manufacturing a case according to the present invention, comprising: a bottom member, one surface member, the other surface member, a bottom gore portion, two side gore portions, and the like. Forming the bottom gore portion and two other side gore portions integrally in a developed state, and welding the bottom gore portion, two side gore portions, another bottom gore portion, and two other side gore portions. A step of folding the bottom member, the bottom gore portion and the center portion of the other bottom gore portion inward to fold the portions to be overlapped, and folding the boundary portion between the bottom member and one surface member and the other surface member outward. When,
A step of sandwiching a separator between the folded bottom gore portion and another folded bottom gore portion to prevent welding of the bottom gore portions and welding of the other bottom gore portions, and a bottom gore portion, A case manufacturing method including a step of welding two side gore portions, another bottom gore portion, and two other side gore portions to be welded simultaneously, and a step of removing a separator.

In the case according to the present invention, the welded portion of the bag can be welded in one welding step. Therefore, in the case according to the present invention, it is easy to form a bag portion.
Further, in the case according to the present invention, one surface member, the other surface member, and the like from the four ends of the bottom member serving as the bottom of the bag portion.
Since the bottom gore part and other bottom gore parts extend and are formed,
The end of the bottom member is not welded. Therefore, in the case according to the present invention, water does not easily leak from the end of the bottom member serving as the bottom of the bag.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the accompanying drawings.

[0008]

FIG. 1 is a perspective view showing an example of a clear case according to the present invention. The clear case 10 shown in FIG. 1 includes a bag portion 12 made of a transparent synthetic resin such as olefin or vinyl chloride.

The bag portion 12 includes a strip-shaped bottom member 14. The lower end of one rectangular surface member 16 and the lower end of the other rectangular surface member 18 are connected to one end and the other end of the bottom member 14 in the width direction, respectively. The two surface members 16 and 18 are formed to extend from one end and the other end in the width direction of the bottom member 14.

One end of the bottom member 14 in the longitudinal direction, one end of the face member 16 and one end of the face member 18
One gore member 20 is connected. The gore member 20 has a right angle 2
An equilateral triangular bottom gore portion 20a and two belt-like side gore portions 20b and 20c are included. The bottom gore portion 20a is formed to extend from one end in the longitudinal direction of the bottom member 14,
The side gore portion 20b is formed to extend from one side end of the surface member 16, and the side gore portion 20c is formed to extend from one side end of the surface member 18. The lower ends of the side gore portions 20b and 20c are each formed obliquely. Then, the upper end of the bottom gore portion 20a and the lower end portions of the side gore portions 20b and 20c are welded at a high frequency. Further, the side end of the side gore portion 20b and the side end of the side gore portion 20c are welded at a high frequency.

Similarly, the other gore member 22 is connected to the other end of the bottom member 14 in the longitudinal direction, the other end of the surface member 16 and the other end of the surface member 18. Gore member 22
Includes another bottom gore portion 22a having a right-angled isosceles triangular shape and two other band-like side gore portions 22b and 22c. The bottom gore portion 22a extends from the other end in the longitudinal direction of the bottom member 14, the side gore portion 22b extends from the other end of the surface member 16, and the side gore portion 22c extends from the surface member 18
Is formed extending from the other end. Also, the side gore portion 22
The lower ends of b and 22c are each formed obliquely. The upper end of the bottom gore portion 22a and the side gore portion 22b
And the lower end of 22c are welded at a high frequency. Further, the side end of the side gore portion 22b and the side end of the side gore portion 22c are welded at a high frequency.

On the surface of the face member 16 of the bag portion 12, three ends of a substantially rectangular pocket piece 24 made of synthetic resin such as olefin or vinyl chloride are welded at a high frequency. Between the pocket piece 24 and the surface member 16, for example, a heading sheet in which a name or the like is entered can be inserted. Note that the pocket piece 24 may not be formed.

A fastener 2 made of, for example, a synthetic resin such as olefin or vinyl chloride is provided at the upper opening of the bag portion 12, ie, at the upper ends of the surface members 16 and 18.
6 are deposited at a high frequency.

Further, both ends of the upper portion of the bag portion 12 are folded in a state where the side gore portions 20b, 20c, 22b and 22c of the gore members 20 and 22 are folded between the surface members 16 and 18, and a ring-shaped portion is made of a high frequency wave. And a hole 28 for suspension is formed in the center of the ring-shaped welded portion.

Next, an example of a method for manufacturing the clear case 10 shown in FIG. 1 will be described.

First, as shown in FIG.
Face members 16 and 18, and bottom gore portions 20a and 22a
And the side gore portions 20b, 20c, 22b and 22c are integrally formed in a developed state. in this case,
2, ie, each member 14, 1
6, 18, each part 20a, 20b, 20c, 22a, 2
2b, 22c, and member 14, part 20a,
22a, and a central portion of 20a, 20b, 20c, 2
The boundaries between the welded portions of 2a, 22b, and 22c and the non-welded portions are formed thin to facilitate folding.

As shown in FIG. 3, three ends of the pocket piece 24 are welded to the surface of the surface member 16 at a high frequency, and a fastener 26 is welded to the upper ends of the surface members 16 and 18 at a high frequency. You.

Then, as shown in FIGS. 3 and 4,
The central portion of the bottom member 14 and the bottom gore portions 20a and 22a is folded inward, and the bottom member 14 and the surface members 16 and 18 are folded.
Is folded outward. Thereby, the bottom gore portions 20a, 22a and the side gore portions 20b, 20c, 22
The parts to be welded b and 22c are overlapped.

As shown in FIGS. 3 and 4, between the folded bottom members 14 and between the folded bottom gore portions 20a and 22a, the bottom gore portions 20a and 22a such as polyethylene are hardly welded. A sheet-like separator S made of a material is sandwiched. This separator S is for preventing welding between the bottom gore portions 20a and 22a.

Then, the upper end of the bottom gore portion 20a and the lower end of the side gore portions 20b and 20c are connected to the side gore portion 20b.
Of the bottom gore portion 22 and the side end portion of the side gore portion 20c.
The upper end of “a” and the lower ends of the side gore portions 22b and 22c are welded at a high frequency to the side end of the side gore portion 22b and the side end of the side gore portion 22c, respectively. In this case, the welded portions are simultaneously welded in one welding step. Thereby, the bag part 12 is made.

Then, the separator S is removed from the bag portion 12.

Then, as shown in FIGS. 1 and 5,
In a state where the side gore portions 20b, 20c, 22b and 22c of the gore members 20 and 22 are folded between the face members 16 and 18, both ends in the longitudinal direction of the fastener 26 are welded at high frequency and the upper portion of the bag portion 12 Are welded at a high frequency, and a suspension hole 28 is formed at the center of the ring-shaped welded portion.

In the clear case 10 shown in FIG. 1, the welded portion of the bag portion 12 can be welded in one welding step. Therefore, in the clear case 10, the bag 12
Easy to make.

Further, in the clear case 10 shown in FIG. 1, the surface members 16, 18 and the bottom gore portions 20a, 22a extend from the four ends of the bottom member 14 serving as the bottom of the bag portion 12. The end of the bottom member 14 is not welded. Therefore, in the clear case 10, water leakage hardly occurs from the end of the bottom member 14 outside the bag portion 12.

Although the above-mentioned clear case 10 is formed of olefin or vinyl chloride, in the present invention,
The clear case may be formed of another synthetic resin. The present invention can also be applied to a case including a bag portion made of a non-transparent synthetic resin.

Further, although the above-described clear case 10 has the pocket pieces 24 and the hanging holes 28, the present invention can be applied to a case having no such pocket pieces or hanging holes.

In the above-described example, the separator S is formed in a sheet shape from polyethylene, but in the present invention, the separator is made of another material that is not easily welded to the bottom gore portion, for example, polyethylene terephthalate, paper, metal, surface, etc. It may be formed of a material obtained by applying a release agent such as silicon to the substrate, or may be formed in a plate shape.

Further, in the above-described example, the respective welded portions are welded at a high frequency. However, in the present invention, the welded portions may be welded by other means such as ultrasonic waves.

[0029]

According to the present invention, a case can be obtained in which the bag can be easily formed and the bag does not easily leak.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a clear case according to the present invention.

FIG. 2 is a development view showing a bottom member and a surface member used in the clear case shown in FIG. 1;

FIG. 3 is a front view showing a step of forming a bag portion of the clear case shown in FIG.

FIG. 4 is a side view showing a step of forming a bag portion of the clear case shown in FIG.

FIG. 5 is a front view showing the clear case shown in FIG. 1;

FIG. 6 is a perspective view showing an example of a conventional clear case.

FIG. 7 is a perspective view showing a bottom member and a surface member used in the clear case shown in FIG. 6;

FIG. 8 is a perspective view showing a step of forming a bag portion of the clear case shown in FIG.

DESCRIPTION OF SYMBOLS 10 Clear case 12 Bag part 14 Bottom member 16, 18 Surface member 20, 22 Gore member 20a, 22a Bottom gore part 20b, 20c, 22b, 22c Side gore part 24 Pocket piece 26 Fastener 28 For hanging Hole S Separator

Claims (2)

[Claims] 1. A case including a bag portion made of a synthetic resin, wherein the bag portion has a rectangular bottom member, and a rectangular one surface formed to extend from one end of the bottom member in a width direction. Member, the other rectangular surface member formed extending from the other end in the width direction of the bottom member, one end in the longitudinal direction of the bottom member, one side end of the one surface member, and the other end One gore member connected to one end of the surface member, and the other end in the longitudinal direction of the bottom member, the other end of the one surface member and the other end of the other surface member. The other gore member is connected, the one gore member is a bottom gore portion formed to extend from one end in the longitudinal direction of the bottom member, and one side end of the one surface member and the other. Is formed to extend from one side end of the surface member, and the lower end is The other gore member includes two side gore portions welded to an upper end portion of the bottom gore portion and side end portions are welded to each other, and the other gore member extends from the other end portion in the longitudinal direction of the bottom member. Bottom gore portion, and the other end of the one surface member and the other end of the other surface member are formed to extend from the other end, the lower end is welded to the upper end of the other bottom gore portion, A case including two other side gore portions to which the ends are welded. 2. The method of manufacturing a case according to claim 1, wherein the bottom member, the one surface member, the other surface member, the bottom gore portion, and the two side gore portions are provided. Forming the other bottom gore portion and the two other side gore portions integrally in a developed state; the bottom gore portion, the two side gore portions, the other bottom gore portion, and the two In order to overlap the welded portions of the other side gore portions, the bottom member, the bottom gore portion and the central portion of the other bottom gore portion are folded inward, and the bottom member and the one surface member and the one A step of outwardly folding a boundary portion with the other surface member, welding between the folded bottom gore portions and between the folded bottom gore portions and the other bottom gore portions. Work to insert a separator to prevent welding of parts A step of simultaneously welding the bottom gore portion, the two side gore portions, the other bottom gore portion and the two other side gore portions to be welded, and a step of removing the separator. Production method.