JPH0752256A - Welding machine for film material made of thermoplastic resin - Google Patents

Abstract

PURPOSE:To weld film materials to each other regardless of the qualities of the film materials without needlessly heating a part other than a welding part and continuously conduct a welding operation to enhance a workability in welding. CONSTITUTION:The title machine is provided with a pressure contact means 16 for bringing thermoplastic resin film materials 1, 2 to be overlapped with each other into pressure contact with each other at opposed parts 3, 4 thereof and an emitting means 27 for concentratively emitting a light beam 26 to a pressure contact part 25 of the opposed parts 3, 4 between the opened opposed parts 3, 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dome made of a thermoplastic resin for forming a dome made of a film in a baseball field, a flexible container used for transporting powder and granular materials, and a civil engineering sheet used in the field of civil engineering. The present invention relates to a film material welding machine for welding film materials to each other.

[0002]

2. Description of the Related Art In the case of welding film materials made of thermoplastic resin to each other, high frequency dielectric, ultrasonic sealing,
An indirect heating type welding machine using an impulse seal or the like is used.

A direct heating type welding machine using hot air, a hot platen or the like is also used.

[0004]

By the way, in the case of the above-mentioned indirect heating type welding machine, there are some that can be welded depending on the material of the film material and those that do not, due to their characteristics.
It is not possible for each model to weld all types of membrane materials. Therefore, when performing a welding operation using this type of welding machine, there is a problem in workability that it is necessary to select one of the welding machines for each material of the film material to be welded.

Further, in the above-mentioned direct heating type welding machine, any film material can be welded. However, when hot air is used, this hot air spreads over a wide area and is not welded. There is a problem that it will be heated unnecessarily. When a hot platen is used, the hot platen is first pressed against the portion to be welded to weld it, and then the hot platen is moved away from it to press the next point. It is necessary to repeat the welding process and the separation process to proceed with the welding work in sequence. Therefore, according to the hot plate, there is a problem that the welding work becomes intermittent and the workability is poor.

[0006]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to the above circumstances, and makes it possible to weld film materials to each other regardless of the material of the film materials, and the parts other than the parts to be welded. The purpose of the present invention is to improve the workability of welding by enabling welding to be performed without being heated unnecessarily, and further enabling welding work to be performed continuously.

[0007]

The features of the present invention for achieving the above-mentioned object are to provide a pressing means for pressing both facing parts of the thermoplastic resin film materials to be pressed against each other, and an expanding method. The irradiation means for irradiating the pressure contact portions of the both facing portions with a light beam in a concentrated manner is provided.

In the above case, a support is provided which is inserted between both facing parts so as to be freely inserted and removed so as to expand the both facing parts. The support is made to support both the pressure contact means and the irradiation means. The pressing means and the irradiating means may be integrally movable along the longitudinal direction of the facing parts.

[0009]

[Operation] The operation of the above configuration is as follows.

The pressure contact means 16 for press-contacting the facing parts 3 and 4 of the thermoplastic resin film materials 1 and 2 to be overlapped with each other and the expanded opposite facing parts 3 and 4 are passed through the above-mentioned both. Irradiation means 27 that intensively irradiates the pressure contact portion 25 of the facing portions 3 and 4 with the light beam 26 is provided.

Therefore, the facing portions 3, 4 of the film materials 1, 2
Is welded by the light beam 26. Due to such a light beam 26, the above welding is possible regardless of the material of the film materials 1 and 2 due to its characteristics.

The light beam 26 from the irradiation means 27 is also used.
Is intensively applied to the pressure contact portions 25 of the facing portions 3 and 4 pressed by the pressure contact portion 25.

Further, when the welding machine 6 is moved along the longitudinal direction of the facing portions 3 and 4, the press contact portion 25 is set in sequence while moving along the longitudinal direction of the facing portions 3 and 4. , The light beam 26 is applied to the pressure contact portion 25 by the irradiation means 27.
Is continuously irradiated.

In the above case, the support 8 is inserted between the opposite facing portions 3 and 4 so as to be detachable so as to expand the opposite facing portions 3 and 4.
The supporting member 8 is made to support both the pressure contact means 16 and the irradiation means 27, and the support member 8, the pressure contact means 16 and the irradiation means 27 are integrated along the longitudinal direction of the facing portions 3 and 4. It may be movable to.

In this way, since the relative position of the pressure contact means 16 and the irradiation means 27 is determined, the pressure contact portion 25 of the two facing parts 3, 4 pressed by the pressure contact means 16 is pressed.
On the other hand, the light beam 26 from the irradiating means 27 is accurately radiated and welding can be performed accurately.

[0016]

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

(Example 1)

1 to 3 show a first embodiment. For convenience of description, the direction of the arrow Fr in the drawing is the front, and the left and right described below are the directions toward the front.

In the figure, reference numerals 1 and 2 denote a pair of membrane materials which are welded to each other. These membrane materials 1 and 2 are both made of a thermoplastic resin, and more specifically, tetrafluoroethylene resin coated glass fiber. It is a woven fabric.

The above-mentioned membrane materials 1 and 2 are arranged side by side on the left and right sides, and the right and left edges of the membrane material 1 on the left side are on the lower side and the left edge of the membrane material 2 on the right side is on the upper side. The edges are facing portions 3 and 4, respectively.

A welding machine 6 for heat-welding the facing portions 3 and 4 to each other is provided, and a film body 7 having a large area is formed by this welding, and the film body 7 is used for a film structure such as a dome. .

The welding machine 6 has a box-shaped support member 8 which is inserted into the facing portions 3 and 4 so as to be freely inserted and removed so that the facing portions 3 and 4 are spread apart from each other. There is. The support 8 is provided with an upper surface plate 9 and a lower surface plate 10 facing each other vertically, and a left side plate 11 and a right side plate 12 facing left and right, and as the front portions of the upper surface plate 9 and the lower surface plate 10 face forward. The support members 8 are close to each other, that is, the front portion of the support member 8 is a tapered portion 13 facing forward. Further, an opening portion 14 that opens forward is formed at the front end of the tapered portion 13.

A pressing means 16 is provided for pressing the facing parts 3 and 4 near the front of the support 8 to each other. The pressure contact means 16 includes an upper arm 17 supported by the upper portion of the left side plate 11 and protruding forward, and a lower arm 1 supported by the lower portion of the right side plate 12 and protruding forward.
8 and. An upper support shaft 19 projects from the projecting end of the upper arm 17 toward the right side, and a lower support shaft 20 projects from the projecting end of the lower arm 18 toward the left side. The roller 22 includes a lower support shaft 20 and a lower roller 23.
Are rotatably supported around their respective axes.

The upper roller 22 and the lower roller 23 are substantially parallel to each other, and the facing portion 3 is provided between the upper roller 22 and the lower roller 23.
4 is inserted so that it can be inserted and removed freely, and is sandwiched by it.
The facing portions 3 and 4 are pressed against each other.

The pressure contact portions 25 of the facing portions 3 and 4 are linearly long in the left and right directions. With respect to this pressure contact portion 25,
Same as above, which is expanded vertically
Irradiation means 27 for intensively irradiating 6 in a side view is provided.

The irradiation means 27 has a light source 28 made of a halogen lamp which is housed in the front part of the support 8 and is long in the left and right. Further, the reflecting mirror 2 that covers the light source 28 from the rear side.
9 is provided, and the reflecting mirror 29 has an arc shape in a side view and extends to the left and right. The light source 28 and the reflecting mirror 29 are supported by the support 8.

When the light source 28 is connected to a power source, the light rays 26 are emitted from the light source 28, and the light rays 26 directly or indirectly reflected by the reflecting mirror 29 to the opening portion 14. The pressure contact portion 25 is intensively irradiated.

The light rays 26 are preferably near infrared rays, but may be far infrared rays. When the light beam 26 is applied to the pressure contact portion 25, the pressure contact portion 25 is heated and melted, whereby the facing portions 3 and 4 are welded to each other.

A transparent welding promoting film 31 made of a fluoroethylene propylene film is provided to strengthen the welding. The welding promoting film 31 is in the form of a tape, and its rear end side is wound around a roll shaft 32 to form a roll, and the roll shaft 32 is detachably supported in the rear portion of the support body 8. On the other hand, the same as above, the front end side of the welding promotion film 31 is sandwiched between the facing portions 3 and 4, and when the pressure contact portion 25 is irradiated with the light beam 26, the pressure contact portion 25 and the welding promotion film 31 are both melted. As a result, the welding of the facing portions 3 and 4 is made stronger. 33 is a guide shaft.

In the above case, since the light beam 26 is focused on the pressure contact portion 25, the welding promoting film 31 may be unnecessarily irradiated to abruptly melt the welding promoting film 31. To be prevented. Further, since the welding promoting film 31 is transparent, it is hard to be heated even if the welding promoting film 31 is irradiated with the light beam 26. Therefore, also in this point, the welding promoting film 31 is also used.
Is prevented from abruptly melting.

A handle 35 is projectingly provided on the left side surface of the support 8.

When the facing portions 3 and 4 are welded,
First, the facing parts 3 and 4 are sandwiched between the upper roller 22 and the lower roller 23, and the facing parts 3 and 4 are spread vertically.
The support 8 is inserted between them.

Next, the light source 28 is turned on, the handle 35 is grasped, and the support 8 is moved backward together with the press contact means 16 and the irradiation means 27 along the longitudinal direction (front-back direction) of the facing portions 3 and 4. Alternatively, the support 8 is fixed, and the left and right membrane materials 1 and 2 are moved forward, that is, the welding machine 6 is moved backward relative to the longitudinal direction of the facing portions 3 and 4.

Then, while the upper roller 22 and the lower roller 23 roll on the upper and lower surfaces of the facing parts 3 and 4 (arrow A in FIG. 1), the facing parts 3 and 4 are sequentially brought into pressure contact with each other, and the pressure contact parts 25 is sequentially irradiated with the light beam 26 by the irradiation means 27, and the facing portions 3 and 4 are continuously welded to each other.

Further, when the support 8 is moved, the facing portions 3 and 4, the upper plate 9 and the lower plate 10 of the support 8 are slid relative to each other.

The pressing means 16 and the welding promoting film 3
The roll shaft 32 and the roll shaft 32 can be freely inserted into and removed from the support 8.

Although the above description is based on the illustrated example, the pressure contact means 16 is provided separately from the support 8 as described above.
6 and the irradiation means 27 may be individually fixed to the fixed side.

Further, the size between the upper roller 22 and the lower roller 23 may be adjustable, and furthermore, the facing portions 3 and 4 are elastically sandwiched by the upper roller 22 and the lower roller 23 via a spring. You may do it. Furthermore, the welding machine 6 is
It can be widely used for welding thermoplastic resin film materials such as general tent structures and tent warehouses.

(Example 2)

FIG. 4 shows the second embodiment.

According to this, the lower arm 18, the lower support shaft 20, and the lower roller 23 in the pressure contact means 16 of the first embodiment.
Has been deleted.

When the welding operation is performed by the welding machine 6 having the above-described structure, the facing portions 3 and 4 are placed on the support base, or the space on the lower surface side of the membrane material 1 is pressurized. While the tension is being applied to the film material 1, the welding machine 6 may be placed on the facing portions 3 and 4 to perform the welding operation of the facing portions 3 and 4.

Since other structures and operations are the same as those of the first embodiment, common structures are denoted by common reference numerals in the drawings and their description is omitted.

[0044]

According to the present invention, the pressing means for pressing both facing parts of the thermoplastic resin film materials to be overlapped with each other and the expanded opposite facing parts through the above-mentioned both facing parts are provided. And an irradiating unit for irradiating the pressure contact portion with the light beam in a concentrated manner.

Therefore, both facing portions of the film material are welded by the light beam, and according to such a light beam,
Due to its characteristics, the above welding can be performed with any film material.

Further, since the light beam from the irradiating means is intensively applied to the pressure-contacting parts of the two facing parts which are pressure-contacted by the pressure-contacting part, the part other than the part to be welded is unnecessarily heated. To be prevented.

Further, if the welding machine is moved along the longitudinal direction of both facing parts, the pressure contact parts are sequentially set while moving along the longitudinal direction of the facing parts, and the irradiation means is applied to this pressure contact part. As a result, the light beam is continuously irradiated, so that the welding work can be continuously performed and the workability thereof is improved.

In the above case, a support member is provided which is inserted between both facing parts so as to be freely inserted and removed so as to widen both facing parts, and the support member supports both the pressure contact means and the irradiation means. The pressing means and the irradiating means may be integrally movable along the longitudinal direction of the facing parts.

With this configuration, since the relative position of the pressure contact means and the irradiation means is determined, the light rays from the irradiation means are accurately applied to the pressure contact portions of the two facing surfaces pressed by the pressure contact means. Can be welded accurately. Moreover, since the pressing means and the irradiation means move integrally, it is not necessary to individually operate them, and thus the welding work becomes easier.

[Brief description of drawings]

FIG. 1 is a side sectional view of the first embodiment.

FIG. 2 is a partially cutaway plan view of the first embodiment.

FIG. 3 is a front view of the first embodiment.

FIG. 4 is a diagram corresponding to FIG. 1 in the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Membrane material 2 Membrane material 3 Face-to-face portion 4 Face-to-face portion 6 Welding machine 8 Support 16 Pressure welding means 25 Pressure welding portion 26 Light beam 27 Irradiation means 31 Welding promoting film

Claims (2)

[Claims] 1. A press-contact means for press-contacting both facing parts of thermoplastic resin film materials to be superposed on each other, and a spread-out same pair of face-to-face parts, through which the press-contact parts of both facing faces are connected. A film material welding machine made of a thermoplastic resin, which is provided with an irradiation means for intensively irradiating light rays. 2. A support body, which is inserted between both facing parts so as to be freely inserted and removed so as to expand the both facing parts, is provided, and both the pressure contact means and the irradiation means are supported by the support body, and the support body and the pressure contact means are provided. 2. The film material welding machine made of a thermoplastic resin according to claim 1, wherein the irradiation means and the irradiation means are integrally movable along the longitudinal direction of the facing parts.