JP3102474B2 - Synthetic resin balloon - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balloon made of a flexible heat-fusible synthetic resin for use in appendices of children's magazines, toys and other beach equipment.

[0002]

2. Description of the Related Art The valve structure of a conventional balloon made of synthetic resin is, for example, the structure described in Japanese Utility Model Laid-Open Publication No. 51-147585. However, in this structure, a film, which is a valve body made of the same material as the main body, is overlapped on the outside of the balloon main body, and the shape of the film is formed in a substantially circular shape. Therefore, the material of the valve body must be the same as the material of the balloon body, and since the shape of the film is a circular shape with a limited shape, it must be processed by hand without being familiar with mechanical production, so large quantities Production was difficult, resulting in increased costs. Further, the above-described valve structure has a fatal defect for a balloon as a product in which air introduced into the balloon easily leaks. That is, in the conventional valve structure, the outer film is pressed against the inner film to shut off the air leakage. In view of the difference in external pressure, serious air leakage will occur.

[0004] The present invention has been made in view of such problems, and an object of the present invention is to provide a mechanical mass production method based on an automatic bag making machine by forming a valve film into a single piece, especially a belt shape. It provides a balloon made of synthetic resin with a valve structure that can realize long-term storage of air that has been introduced by using a unique fusion method with three layers, which is highly compatible with production and dramatically reduces costs. is there.

[0005]

In order to achieve the above object, a balloon made of a flexible heat-fusible synthetic resin film according to the present invention comprises a first synthetic resin film piece 1 on the inner wall of the balloon body F.
And a blowing hole K is formed in the center of the first synthetic resin film piece 1. Further, the first synthetic resin film piece 1 and the balloon main body F are provided inside the entire circumference of the blowing hole K. The two pieces of the synthetic resin film of the balloon main body F, the first synthetic resin film piece 1 and the second synthetic resin film piece 2 are laid, and the balloon body F and the first synthetic resin film piece 2 are laid. It has a valve structure in which an air conduction port D is left in the outer periphery of the inner heat fusion 3 and the outer heat fusion 4 is made to adhere to the piece.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A balloon body F and a valve coating 1,
2 is made of a soft, heat-fusible, thin synthetic resin material, and is particularly preferably a polyolefin resin film such as polyethylene or a nylon polylaminate film, or soft vinyl chloride. The two inner coatings 1 and 2 constituting the valve each have a single-piece shape. Further, by forming the belt into a belt shape, mechanical mass production by an automatic bag making machine becomes possible, and the cost of balloon production can be greatly reduced. Further, since these coatings 1 and 2 constituting the valve are laid on the inner wall of the balloon body F, the coatings 1 and 2 are not necessarily required.
Without using the same material as balloons, mass production of valves,
It is possible to contribute to cost reduction. The blowing hole K is
The balloon body F and the first synthetic resin film piece 1 are combined, and are pierced by a metal blade or thermal cutting. The shape of the hole K is, for example, U-shaped as shown in the embodiment, and the cut-out piece is turned up, a straw S or the like is inserted through the gap, and air enters the balloon. Blow hole K
After the drilling, the first synthetic resin film piece 1 is subjected to inner heat fusion 3 so as to surround the outer periphery of the blowing hole K. For example, the shape is thermally fused in a circular shape as shown in the embodiment. Make Then, the second synthetic resin film piece 2 is laid there, and the outer heat fusion 4 is formed so as to surround the outer periphery of the inner heat fusion 3. As shown in the embodiment, the outer heat fusion 4 needs to be provided with an air conducting port D by, for example, making the shape into a C-shape. Thus, the valve has a three-layer structure,
In addition, for example, by applying heat fusion in a circular shape on the inside and a C-shape on the outside around the blow hole K, the internal pressure inside the balloon and the inside between the balloon body F and the first synthetic resin film piece 1 can be increased. The pressing becomes substantially equal, whereby the first synthetic resin film piece 1 and the second synthetic resin film piece 2 come into close contact with each other, and it is possible to almost completely block the leakage of the air that has entered.

[0007]

According to the present invention, the mass of the film constituting the valve is formed into a single piece, especially a strip, thereby realizing mechanical mass production by an automatic bag making machine, and dramatically reducing the production cost, thereby reducing the cost of heat. It is possible to provide a fusible synthetic resin balloon. By providing a three-layer valve and applying a unique fusion method, a heat-fusing synthetic resin balloon capable of preventing air leaking into the balloon from leaking and maintaining an inflated state for a long period of time is provided. It is possible to do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a front sectional view showing an embodiment of the present invention.

FIG. 3 is a conceptual sectional view showing a flow of air pressure in the present invention.

FIG. 4 is a front view showing the embodiment of the present invention.

FIG. 5 is an enlarged plan view of a valve section according to the present invention.

FIG. 6 is a view showing a structure of a valve section in a balloon of a conventional example.

FIG. 7 is a conceptual sectional view showing a flow of air pressure in a balloon of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First synthetic resin film piece 2 Second synthetic resin film piece 3 Inner heat fusion 4 Outer heat fusion F Balloon body K Blow-in hole D Air conduction port

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A63H 27/10

Claims (1)

(57) [Claims] 1. A balloon made of a flexible heat-fusible synthetic resin film, wherein a first synthetic resin film piece 1 is formed on an inner wall of the balloon body F.
And a blow hole K is formed in the center of the first film piece 1. The first synthetic resin film piece 1 and the balloon body F are internally heat-fused over the entire circumference of the blow hole K. The second synthetic resin film piece 2 is further laid down by making the clothes 3, and the balloon body F, the first synthetic resin film piece 1 and the second synthetic resin film piece 2 are attached to the two synthetic resin film pieces. A synthetic resin balloon characterized by a valve structure in which an air conduction port D is left around the inner heat fusion 3 and the outer heat fusion 4 is formed so as to make close contact.