JP3317546B2 - Method for manufacturing envelope of airship or balloon by multi-segment gore - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for manufacturing an airship or balloon envelope by welding multi-piece gores, and more particularly to an improvement in productivity.

[0002]

2. Description of the Related Art As a conventional method of manufacturing an airship or balloon envelope, as shown in FIG. 6, a plurality of line-symmetrical gores are cut in advance from a film material, and the outer ends of the cut gores are overlapped. A method is known in which the outer peripheral edge portion is bonded one by one by welding or sewing, and a bag-shaped envelope is completed by bonding a plurality of these to each other, and helium gas or hydrogen gas is injected into the envelope. Creates airships and balloons.

[0003]

However, in the case of such a conventional method for manufacturing an envelope, it is necessary to stack the gores one by one and join the outer periphery by welding or the like. It takes a long time. In addition, since the bonding is performed one by one, there is also an inconvenience that the welded portion of the film material is slightly wrinkled due to an error in the bonding operation. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described drawbacks of the related art, and has as its object to provide a method for manufacturing an envelope which requires a short working time and has less wrinkles at a joint.

[0004]

Means for Solving the Problems: That is, the present invention provides: a) a band-like film material which can be welded on only one side is bent in a bellows shape so that the welding side is inside and the valleys are in contact with each other; Folding the end of the material to the crest of the other bent piece; b) intersecting the folded film material with the edge on the non-welding side of the film material
Welding a discontinuous welded wire in a gore shape symmetrical to the bent valley line of the film material folded by a welding machine of high frequency, impulse, heat, or the like; c) film outside the welded wire This object is achieved by a method for producing an airship or balloon envelope using a multi-segment gore, which comprises the steps of cutting the material and d) turning over the cut bag-shaped envelope. In the present invention, it is necessary to fold the film material as accurately as possible.
When welding in a line-symmetrical gore shape, welding is performed according to the shape of the airship or balloon to be manufactured so that the finished product becomes a sphere or an ellipsoidal sphere. Also from the relationship reversing after cutting and configured to open one end of the welded portion.

[0005]

A plurality of film members having the same width can be formed symmetrically in the left and right directions from the step a), and are continuously welded to the folded portion inside the film material in the step b). An envelope is formed by welding a plurality of gores simultaneously, and the welded portion on the periphery is located inside the envelope in the step d), so that the envelope has a smooth surface.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. Reference numeral 1 denotes a strip-shaped film material which can be welded on one side (surface) used in the present invention. As shown in FIG. A line is drawn, and the film material at both ends of the basic shape 2 is bent a plurality of times in a bellows shape with the center line between the crest lines as the valley line 3, and finally the basic shape at one end of one of the strips 1 is replaced with the other. It is folded over the folded piece. Note that, when bending in a bellows shape, the bending valley lines 3 on both sides are accurately bent so as to make line contact.

[0007] Next, with the film material 1 folded in a bellows shape being properly stacked, the inside of the film material 1 is welded by a welding machine using high frequency, impulse or heat as shown in FIG.
At the time of welding, in order to improve the shape of the finished product, the welding wire 4 is formed in a symmetrical gore shape with respect to the central valley lines 3 and 3.
In this embodiment, one end is discontinuous so that a hole is formed at one end.

Further, as shown in FIG. 2, after the welding, cutting is performed along a slightly outer peripheral side of the welding wire 4 to obtain a plurality of sheets (10 sheets).
, But the welding line and the cut pieces protrude above the surface. Then, when the envelope is turned over, the welded portion of the gore 5 and the cut pieces are located inside the envelope 6, so that the completed envelope surface becomes smooth.

Next, FIG. 5 shows a second embodiment of the manufacturing method, in which a plurality of film materials 1 which can be welded on one side are cut in a rectangular shape in advance, and two of them are left. The other film material 1 is folded in half so that the welding side is located on the outside, and a plurality of layers are superimposed symmetrically so that the bending lines 3 and 3 are in line contact. Thus, the stacked layers are sandwiched. Subsequent processes such as welding, cutting, and turning over are the same as those in the first embodiment.

In the construction described above, the contours of a plurality of symmetrically identical gores 5 can be obtained by welding linearly symmetrically with a welding machine by means of a welding machine. The same type of gore 5 is welded to the outer peripheral edge (FIG. 2). Next, by turning over the holes formed at the end of the envelope 6 formed by welding a plurality of the gores 5, an envelope of an airship or a balloon having a smooth surface can be manufactured.

In the first and second embodiments, a method of manufacturing an envelope for manufacturing an airship has been described. However, the present invention is not limited to this, and a balloon-shaped one is manufactured by appropriately selecting a welding wire. It goes without saying that it can be done. Note that a material that hardly escapes helium gas, hydrogen gas, or the like is preferably used as a film material for forming the envelope. In the second embodiment, an example in which the film material is cut into a rectangular shape is shown. However, the present invention is not limited to this. The bending line 3 is bent so as to be a straight line, and the bending lines 3 and 3 are in line contact with each other. In this way, a plurality of layers may be superposed symmetrically in a layered manner.

[0012]

As described above, the method for producing an envelope according to the present invention can produce an envelope at one time by one welding operation and one cutting operation, so that the envelope is produced as compared with the conventional method. Work is easy and wrinkles are not easily formed in the welded part.

[Brief description of the drawings]

FIG. 1 is a front view and a side view of a film material according to the present invention.

2A and 2B are a front view and a side view showing a shape of a gore in a step of cutting from welding.

FIG. 3 is a front view showing a state where an envelope is turned upside down.

FIG. 4 is an end view of a longitudinal section of FIG. 3;

FIG. 5 is a side view of a film material showing a second embodiment.

FIG. 6 is a perspective view of a conventional technique for welding many gores one by one.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Membrane material 2 Basic form 3 Valley line 4 Welding line 5 Gore 6 Envelope

Claims (2)

(57) [Claims] 1. The following steps a) to d): a) A band-shaped film material that can be welded on only one side is bent in a bellows shape so that the welding side is on the inside and the valleys are in contact with each other. And b) intersecting the folded film material with the non-welded side edge of the film material.
Welding a discontinuous welded wire in a gore shape symmetrical to the bent valley line of the film material folded by a welding machine of high frequency, impulse, heat, or the like; c) film outside the welded wire A method for manufacturing an airship or balloon envelope by multi-segment gore, comprising the steps of: cutting a material; and d) turning over the cut bag-shaped envelope. 2. The following steps a) to d): a) A rectangular film material which can be welded on only one side is folded in half so that the welding side is on the outside, so that the bent valley portions are in contact with each other. A step of stacking a plurality of left and right sheets, and further sandwiching the upper and lower sides thereof by a welding side of a rectangular film material; and b) intersecting the folded film material with an edge of a non-welding side of the film material.
Welding a discontinuous welded wire in a gore shape symmetrical to the bent valley line of the film material folded by a welding machine of high frequency, impulse, heat, or the like; c) film outside the welded wire A method for manufacturing an airship or balloon envelope by multi-segment gore, comprising the steps of: cutting a material; and d) turning over the cut bag-shaped envelope.