JP3828893B2 - Plastic balloon - Google Patents

Description

  The present invention relates to a synthetic resin balloon, and more particularly to a synthetic resin balloon having a special valve structure.

  2. Description of the Related Art Conventionally, a synthetic resin balloon has been provided which is formed into a spherical balloon by folding an appropriate number of synthetic resin tubes and heat-sealing the ends thereof. (For example, Patent Document 1 and Patent Document 2)

Real Kaihei 2-332898 Real Kaihei 5-65394

  Conventionally provided synthetic resin balloons as described above have a shape in which a cylindrical air blowing port projects from the balloon body.

  Therefore, after the air is blown into the balloon, the air inside the balloon is sealed by tying the tip of the protruding air blowing port.

  However, it is not easy to tie an air inlet when the balloon is filled with air, and the work becomes cumbersome, sometimes air leaks during the work, and the shape of the balloon is damaged. .

  Further, a balloon with a projecting air blowing port that is tied is not aesthetically pleasing as an overall shape, and is particularly unfavorable as a balloon shape such as a spherical shape.

The present invention has been made in view of the above problems, and in a synthetic resin balloon, a rectangular synthetic resin film fabric is half-folded, and both edges parallel to the half-fold line of the half-folded fabric are formed. In a state where two folds are formed by folding back inward to the appropriate width, and the two folds are overlapped,
At a position shifted in the direction perpendicular to the fold lines of the both folded portions to form a so fusion Chakusen be parallel with the fold line, with a portion in the melting wire leaving a non - bonding state as an air conduction hole Each end of the fusion line leading to the air conduction port is continued as a fusion line that is bent at a right angle so as to reach the folding line of both folding parts, so that the fusion line is connected to the air conduction port. A valve is formed by symmetrically providing an L shape and an inverted L shape, and the fabric is bent several times in parallel with the line of the half-fold line so that the fabric has an appropriate width. Further, both end portions are fused and cut.

  Since the present invention is configured as described above, the basic structure of the valve is that both folded portions bent inward are fused while leaving an air conduction port.

  When air is introduced through the air vent, the outer film that forms the outer shape of the balloon body pushes up the lower film in the lower folding part, and the lower film is folded in the lower part. Push up the upper film.

  On the other hand, the upper folding part pushes down the lower film of the upper folding part by pulling both ends to the left and right in the process of expanding the balloon into a spherical shape.

  By the above expansion process, the upper lower film and the lower upper film are subjected to vertical pressure, that is, the lower film of the upper folding part is pressed down by the upper film of the upper folding part, and the upper film of the lower folding part is the lower folding part. By the pressure of the lower film being pushed up, they are brought into close contact with each other, thereby making it possible to very effectively seal the leakage of air that has entered the balloon.

  Since this invention is comprised as mentioned above, there exist the following effects.

  Since the valve is formed without providing a protruding air blowing port, it is possible to provide a synthetic resin balloon having excellent aesthetics without damaging the spherical shape of the balloon, and the troublesome work of connecting the air blowing port is also unnecessary. .

The film of the valve adheres to prevent air leakage from the air conduction port, and the balloon inflated state can be maintained for a long time.

  Embodiments of the present invention will be described with reference to the drawings.

  1 to 5 show an embodiment of the present invention, FIG. 1 shows an embodiment of the present invention and is a perspective view showing a state in which air is put in a balloon, and FIG. FIG. 3 is a sectional view showing a state before injecting air according to an embodiment of the present invention, and FIG. 4 is a perspective view of the air pressure in the balloon in the present invention. FIG. 5 is a diagram for explaining the process of manufacturing the present invention.

  In the present invention, it is preferable to use, for example, a soft synthetic resin film having a thickness of about 0.03 to 0.5 mm as the synthetic resin fabric.

  The configuration of the embodiment will be described below with reference to the drawings.

  The film dough is half-folded into a V shape as shown in FIG.

Next, as shown in (2) of FIG. 5, the half-folded fabric is folded back inward at the appropriate widths at both edges parallel to the half-fold line of the half-folded fabric. Thereby, two folding parts are formed at both edges of the fabric.

Next, both folded portions are superposed , and as shown in (3) of FIG. 5, the air conduction port is left in an unfused state from one of the surfaces from either side, and the fusion wire is connected to the air conduction port. It is provided so as to exhibit an L shape and an inverted L shape symmetrically. (The symbol X in the figure represents such a fused line.)

Thus, the air conduction hole is opened from both ends between both folded portion is formed, both the folding portion will be sealed.

  Thus, the valve in the synthetic resin balloon according to the present invention is formed.

Next, the dough on which the valve is formed as described above is bent several times in parallel with the half-fold line, and the dough is cut to a suitable length at both side ends (Y in the figure). This represents the fusion cut portion), and the synthetic resin balloon of the present invention is completed ((4) in FIG. 5).

  Here, the number of folding times and the length of the fabric can be appropriately selected according to the shape of the balloon inflated by inhaling air.

FIG. 3 is a view showing a state before the air is put into the embodiment of the present invention, and is a view showing each layer formed by folding the dough forming the valve twice to form a belt shape. The operation of the valve of the present invention in the process of introducing air will be described.

  Insert a small diameter straw through the air conduction port and blow air into the balloon by blowing air from the tip of the straw.

  When air is introduced through the air conduction port, the outer film (fifth film: reference numeral 5 in FIG. 3) that forms the outer shape of the balloon body is under the folding part in the process of expanding the balloon into a spherical shape. The film (fourth film: reference numeral 4 in FIG. 3) is pushed up, and the lower film pushes up the upper film (third film: reference numeral 3 in FIG. 3) of the lower folded portion (see the upper arrow in FIG. 4).

  On the other hand, the upper folding part is a process in which the balloon is inflated into a spherical shape, and both ends are pulled to the left and right (see the left and right downward arrows in FIG. 4). Film: reference numeral 1) in FIG. 3 pushes down the lower film (second film: reference numeral 2 in FIG. 3) of the upper folded portion (see the upper lower arrow in FIG. 4).

  By the above expansion process, the second film (2) in the upper folding part and the third film (3) in the lower folding part are subjected to vertical pressure, that is, the second film (2) in the upper folding part is in the upper folding part. The pressure of the first film (1) and the third film (3) of the lower fold are brought into close contact with each other by the pressure of the fourth film (4) of the lower fold, thereby closing the air conduction port, It is possible to seal the leakage of air that has entered the balloon very effectively.

  In the present invention, it is possible to appropriately change the width of the air conduction port. However, by making the width slightly wider, for example, a marble or the like can be inserted into the balloon before entering the air. It is also possible to provide a variety of unique balloons to meet various needs.

The perspective view which shows the state which was the Example of this invention and put air in the balloon. The perspective view which is the Example of this invention and shows the state before putting in air. The figure which is the Example of this invention, and shows the state before putting in air. The conceptual diagram which showed the direction of the air pressure in the balloon in this invention. The figure explaining the process which manufactures this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st film 2 2nd film 3 3rd film 4 4th film 5 5th film E Air conduction port A Folding part A 'Folding part X Fusion part Y Fusion cutting part

Claims (1)

A rectangular synthetic resin film fabric is folded in half, and two folded portions are formed by folding back both sides of the half-folded fabric in parallel with the half-fold line to an appropriate width. In the state where the folds are polymerized,
Form a fusion line so as to be parallel to the fold line at a position shifted in a direction perpendicular to the fold line of both folds, and leave a part of the fusion line in an unfused state as an air conduction port. Each end of the fusion line leading to the air conduction port is continued as a fusion line that is bent at a right angle so as to reach the folding line of both folding parts, so that the fusion line is connected to the air conduction port. A valve is formed by symmetrically providing an L shape and an inverted L shape, and the fabric is bent several times in parallel with the line of the half-fold line so that the fabric has an appropriate width. A synthetic resin balloon characterized in that both end portions are fused and cut.

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