JP2002102016A - Bag for fluid mattress and method of manufacturing for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag for a fluid mattress which eliminates the need for disposition of an injection valve of another member, eliminates the need for disposition of a check valve at the front end of an injection valve integrated to a film shape and allows the arbitrary disposition of the injection valve position at the foremost end (outermost part) of the bag. SOLUTION: This bag for the fluid mattress has a check valve mechanism comprising two tongue parts 18A and 18B which are integrally formed at the one-side ends of two films 15A and 15B, a hollow part 16 which is obtained by superposing the two films on each other and welding the outer peripheral edges of the films exclusive of the outer peripheral edges 19 of the tongue parts, an injection port 20 which is inserted with the two tongue parts into the hollow part by turning the two tongue parts inside out and fluid which is injected into the hollow part from this injection port.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a bag for a fluid mattress and a method for producing the same.

[0002]

2. Description of the Related Art As a bag for a fluid mattress, an injection valve of a bag for a fluid mattress in which a viscous fluid such as gel or a fluid such as water is injected into the bag is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-201569. This is provided on the upper surface of the mattress bag with a plug that communicates with the inside of the inner bag, and can be freely opened and closed by an inner plug fitted to the plug and a cap that is fitted externally to the plug. I have. A liquid can be supplied from the stopper into the inner bag.

[0003]

However, in the above prior art, an injection valve is required as an injection port when the contents are injected into a bag-like bag. In the case of manufacturing the injection valve, another process such as heat welding when assembling the injection valve to the film is required, which causes an increase in cost. In addition, when injecting a fluid or other content into the bag, a check valve such as a check valve must be separately provided in the injection valve to prevent the content from flowing back after the injection, which also causes a cost increase. It has become.

Further, since the injection valve has a thickness, when a user rides on the injection valve portion of the bag, the user feels uncomfortable and impairs the merchantability of the mattress. Therefore, the injection valve is disposed at the end of the bag as much as possible. There is a need to.

[0005] This arrangement at the end has limitations on the arrangement, such as the space for assembling the injection valve and the durability of the bag film. Further, if this injection valve is arranged at the end of the bag, stress concentration occurs at the end, which may cause problems in the durability and reliability of the bag.

If the injection valve is disposed at a position slightly away from the end of the bag, after the contents are injected, air flows into the tip of the bag, and the operator tilts the bag to release the air. There is a problem that work is required,
There has been a problem that productivity at the time of manufacturing a bag deteriorates.

The present invention has been made in view of the above situation, and in order to solve the above-mentioned problems, a fluid mattress bag according to the present invention has an injection valve formed integrally with two films. In addition, there is no need to provide a separate injection valve. Further, it is not necessary to provide a check valve such as a check valve at the tip of the injection valve integrated with the film shape.
Further, an object of the present invention is to provide a bag for a fluid mattress in which an injection valve position can be arbitrarily arranged at the outermost end (outermost) of the bag in order to integrally form an injection valve in a film shape.

[0008]

Means for Solving the Problems To solve the above technical problems, the invention according to claim 1 is characterized in that two tongue parts integrally formed at one end of two films, A hollow portion obtained by laminating the films and welding the outer peripheral edge of the film except for the outer peripheral edge of the tongue portion;
The reverse of which the two tongue parts are formed by inserting the two tongue parts into the hollow part by inverting the front and back of the two tongue parts, and the fluid injected into the hollow part from the inlet. This is a fluid mattress bag having a valve stop function.

According to the first aspect of the present invention, it is not necessary to provide a separate injection valve, and it is not necessary to provide a check valve such as a check valve at the tip of the injection valve integrated with the film. This has the effect that the injection valve position can be arbitrarily arranged at the end (outermost).

In order to solve the above-mentioned technical problems, the invention of claim 2 is to integrally form two films on one end of a film.
Forming a hollow portion by superimposing the two films and welding the outer peripheral edge of the film except for the outer peripheral edge of the tongue portion; A step of inserting the two tongue parts into the hollow part to form an inlet by inverting the front and back of the part; a step of injecting a fluid from the inlet into the hollow part; A method for manufacturing a bag for a fluid mattress having a check valve function, comprising a step of welding an outer peripheral edge corresponding to a root portion of an inlet.

According to the second aspect of the present invention, there is no need to provide a separate injection valve, and it is not necessary to provide a check valve such as a check valve at the tip of the injection valve integrated with the film. This has the effect that the injection valve position can be arranged arbitrarily at the end (outermost), and furthermore, since the injection port integrated with the film can be manufactured, the manufacturing process is simple and the cost is reduced. Is advantageous.

According to a third aspect of the present invention, which is made to solve the above-mentioned technical problem, the injection port has a duck bill shape comprising two plate-shaped tongue portions.
Alternatively, there is provided a fluid mattress bag or a method for producing a fluid mattress bag according to claim 2.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, in the comparison between the internal pressure P1 of the bag and the external pressure PO, the relation P1> PO is always satisfied. Has a self-sealing check valve function and has the effect that fluid such as gel injected into the hollow portion does not flow out of the bag.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. In FIG. 1, a fluid mattress 10 including a bag into which a gel-like liquid or water is injected includes a base 11 formed of urethane resin. A concave portion 12 is formed in the center of the base 11, and a fluid mattress bag 15 in which a fluid is sealed is fitted in the concave portion 12. In this state, the base 11 constitutes a housing as a whole.

FIG. 2 is a perspective view of two rectangular films 15A and 15B made of an elastic material made of rubber, urethane resin, elastomer or the like as viewed from the side. FIG. 3 is FIG.
FIG. 5 is a plan view of a bag 15 in which two films 15A and 15B are superimposed as viewed from a direction A of FIG.

At one end of each of the four corners of the films 15A and 15B, plate-like tongue portions 18A and 18B are integrally extended. The two films 15A and 15B are overlapped, and the outer peripheral portions 17A and 17B of the films are welded except for the outer peripheral edges of the tongue portions 18A and 18B to form a welded portion 19 as shown in FIG. 15 are formed. Velo section 18A, 1
8B is welded to the welded portion 119 from the vicinity of the root of the tongue to the center, and the root of the welded tongue has a cylindrical shape. No welding has been done. Further, the tip portions 116A and 116B of the plate-like tongue portions are plate-like and can be separated from each other. As described above, the outer peripheral edges of the films 15A and 15B are welded except for the outer peripheral edges of the tongue portions 18A and 18B.
Each of the tongues 18A and 18B has a plate-like injection port 18 which can be separated from each other like a duck bill (duck beak). With the above configuration, since the outer peripheries of the films 15A and 15B are welded, a bag-shaped hollow portion 16 is formed.

Next, the injection port 18 is connected to the hollow portion 1 of the bag 15.
The two tongues are turned upside down by a jig (not shown) or the like into the inside of the hollow part 1.
6, an inlet 20 having a check valve function as shown in FIGS. 4, 5 and 6 is formed.

FIG. 5 is an enlarged perspective view of the injection port 20 of FIG. 4, and FIG. 6 is a sectional view taken along line AA of FIG.
0 is bulged cylindrically).

The injection port 20 has the same structure as that described above because the film is turned upside down from the structure shown in FIG. In other words, the welding to the tongue parts 18A and 18B is performed at the welding part 119 (1) from the vicinity of the root part to the center of the tongue part.
19A and 119B), and the root portion of the welded tongue has a cylindrical shape. No welding is performed from the central part of the injection port 18 to the vicinity of the tip part. Also in this case, the tip portions 116A and 116B of the plate-shaped tongue portions are in a plate shape that can be separated from each other like a duck bill (duck beak) shape.

Next, a gel-like fluid or the like is injected into the hollow portion 16 of the bag 15 formed as shown in FIG. After injecting a required amount of fluid, the inlet 20 is turned over and inserted into the bag 15.
As shown in FIG. 7, the outer peripheral edge portion 21 corresponding to the root portion is welded, and the bag is completely sealed.

Here, as shown in FIG. 7, the relationship between the pressure P1 inside (hollow portion) of the bag filled with a fluid such as gel and the outside pressure PO is such that P1> PO. The injection port 20 has a self-sealing structure with a check valve function, and the fluid such as gel injected into the hollow portion 16 does not flow out of the bag 15.

According to the above configuration, since the injection port 20 can be formed by a film, there is no sense of incongruity due to the injection port 20,
Stress concentration on the film due to assembly of the injection port of another member is also eliminated, and durability is improved. In addition, there is no need to arrange a separate injection valve, and it is not necessary to arrange a check valve such as a check valve at the tip of the injection valve integrated into the film shape.
Further, there is an effect that the injection valve position can be arbitrarily arranged at the outermost end (outermost) of the bag.

In the present invention, two films are bonded by heat welding, but may be bonded by an adhesive or the like. The fluid to be injected into the bag may be used for a water bed such as water.

[0024]

According to the present invention, the two films are integrally formed at one end of the two films, and the two films are superimposed on each other to remove the outer peripheral edge of the film. A hollow portion obtained by welding an outer peripheral edge, an inlet formed by inserting the two tongue portions into the hollow portion by inverting the two tongue portions, and an inside of the hollow portion. The fluid mattress bag having a check valve function composed of the fluid injected from the injection port, eliminates the need for disposing an injection valve as a separate member, and the injection valve tip integrated into a film shape. In this case, there is no need to provide a check valve such as a check valve, and the injection valve position can be arbitrarily disposed at the outermost end (outermost) of the bag.

[Brief description of the drawings]

FIG. 1 is a perspective view of a fluid mattress in which a bag for a fluid mattress of the present invention is stored.

FIG. 2 is a perspective view of two films of the present invention.

FIG. 3 is a plan view of a bag in which two films are overlapped when viewed from a direction A in FIG. 2 of the present invention.

FIG. 4 is a plan view of a bag having an injection port of the present invention inserted into a hollow portion.

FIG. 5 is an enlarged perspective view of the injection port 20 of FIG.

FIG. 6 is a plan view of the bag in which a gel-like fluid or the like is inserted into a hollow portion of the bag, and an injection portion of the injector is inserted into an injection port.

FIG. 7 is a plan view of a bag in which an outer peripheral edge corresponding to a root of an inlet 20 is welded.

[Explanation of symbols]

 15A, 15B: Film 18A, 18B: Velo portion 19: Outer edge 16: Hollow portion 20: Injection port 15: Bag for fluid mattress

Claims (3)

[Claims] 1. An outer peripheral edge of the film is welded except for an outer peripheral edge of the two tongues and an outer peripheral edge of the two tongues integrally formed at one end of the two films. A hollow portion obtained by inverting the two tongue portions, an inlet formed by inserting the two tongue portions into the hollow portion, and an inject hole formed in the hollow portion. Fluid mattress bag having a check valve function composed of a fluid injected from a fluid mat. 2. A step of integrally forming two tongues at one end of two sheets of film, and superposing the two sheets of film to form an outer periphery of the film except for an outer periphery of the tongue. Welding to form a hollow portion; and inverting the two tongue portions so that the two tongue portions are inserted into the hollow portion to form an injection port. A method of manufacturing a bag for a fluid mattress having a check valve function, comprising a step of injecting a fluid from the inlet and a step of welding an outer peripheral edge corresponding to a root of the inverted inlet. 3. The method for manufacturing a bag for a fluid mattress or the bag for a fluid mattress according to claim 1, wherein the inlet has a duck bill shape comprising two plate-shaped tongue portions.