JP2530375Y2 - Sheet stretching equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet stretching apparatus for stretching a heat-welding sheet to a covering surface of a structure such as a tunnel.

[0002]

2. Description of the Related Art A conventional seat stretching apparatus will be described below with reference to FIGS. Conventionally, for example, in order to stretch the waterproof sheet 1 on the inner wall surface W (covering surface) of the tunnel, as shown in FIG. 13, a heat welding disk 2 attached to the inner wall surface W of the tunnel and the heat welding disk 2 Both the waterproof sheets 1 to be heat-welded are heat-melted simultaneously by a hot-air welding device or an electrothermal welding device, and the waterproof sheet 1 is pressed and welded to the hot-welding disk 2.

That is, as shown in FIG. 14, two or more workers form a set, and an assistant sets the waterproof sheet 1 formed in a rectangular shape having an appropriate size at a fixed position. In this state, the welding device held by the welding operator in one hand is inserted into the back surface of the waterproof sheet 1 to heat the heat welding disc 2 and the waterproof sheet 1 to the melting temperature, and the waterproof sheet 1 is pulled from the front by the other hand. The waterproof sheet 1 is welded to the heat welding disk 2 by pressing the heat welding disk 2 and stretched.

[0004] Further, as shown in FIG.
The ends of the waterproof sheet 1 are overlapped with each other by overlapping the overlapping portions 4 provided at the edges of the waterproof sheet 1, and are automatically welded along the overlapping portion 4 while matching the bite width of the electrothermal welding device 3. Connect each other.

[0005]

However, when the waterproof sheet is stretched as described above, the following problems have occurred. That is, the setting of the waterproof sheet 1 at the installation position is performed by the operator extending both hands at the same time, and it is difficult to make the mounting width of the waterproof sheet 1 larger than the length of the arm of the worker. There is a limit to the width of the waterproof sheet 1 that can be stretched, so that the waterproof sheet 1 is repeatedly stretched to cover the entire inner wall surface W, which causes a problem that the work efficiency is reduced. I was In addition, as shown in FIG. 14, if an operator is installed between the overlapping portions 4 to cope with this problem, labor costs will be incurred, which will lead to an increase in working costs and will not be a fundamental solution. In addition, when the waterproof sheet 1 is attached to a tunnel having a large cross section, the work is performed upward on a scaffold above the tunnel, so that there is a problem that the safety is not sufficient and a troublesome work is required.

On the other hand, the hot air welding apparatus sometimes blows hot air to the waterproof sheet 1 beyond the area to be welded when the waterproof sheet 1 is welded. Inconvenience may occur.
In addition, since the electrothermal welding device 3 requires skill in heating the waterproof sheet 1 and the like, rework may occur. Further, in the welding of the overlapping portion 4 as described above, a gap corresponding to the thickness of the electrothermal welding device 3 inserted at the time of welding between the inner wall surface W and the waterproof sheet 1 is generated, and concrete is cast on the inner wall surface W. There is also a problem that inconvenience occurs when performing the operation.

The present invention has been made in view of the above-mentioned problem, and has as its object to provide a sheet stretching apparatus which can easily attach the waterproof sheet 1.

[0008]

SUMMARY OF THE INVENTION A sheet stretching apparatus according to the present invention comprises a body capable of running, a sheet installation section for pressing and spreading the sheet on a covering surface, and a welding apparatus equipped with a welding apparatus for welding the sheet. An attachment, a sheet stretching apparatus including a control unit for controlling the operation of the sheet mounting portion and the welding attachment, wherein the welding attachment is a welding arm formed to be extendable and contractible, and the welding arm A welding device attached to the tip end, and the welding device melts the welding member attached to the rotatable cylindrical body and the welding position of the coating surface or the back surface of the sheet to weld the sheet. And a work coil, wherein the work coil is provided on the cylindrical body.

[0009]

According to the sheet stretching apparatus of the present invention, the sheet setting section is operated to set the sheet to the stretched position, and the welding attachment is moved to the sheet surface. Since this welding attachment is composed of a welding arm formed to be extendable and contractible and a welding device attached to the tip of the welding arm, the sheet is stretched almost simultaneously with the winding of the sheet into the tunnel. I do.

The sheet and the welding material are heated to the welding temperature by operating the welding attachment to generate heat by the electromagnetic induction action, thereby performing the welding. In addition, setting of the sheet at the stretched position, contact of the welding attachment to the sheet surface, and welding of the sheet or the overlapping portions of the sheet by causing the welding material to generate heat by electromagnetic induction are automatically performed and rotated. It is performed continuously by a tubular body of a flexible welding attachment.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the sheet stretching apparatus of the present invention will be described below.
This will be described with reference to FIGS. Note that FIG.
The same components as those in FIGS. 3 to 15 are denoted by the same reference numerals, and description thereof will be simplified. Reference numeral 10 in the figure denotes a sheet stretching device (hereinafter simply referred to as a stretching device) of the present embodiment installed in the tunnel T. The stretching device 10 is disposed in the tunnel T and is disposed to face the inner wall surface W. The stretching device 10 includes a travelable device body 20,
A sheet installation unit 30 that presses and spreads the waterproof sheet 1 against the inner wall surface W, a welding attachment 40 on which a welding device 41 is mounted, and a control unit that controls operations of the sheet installation unit 30 and the welding attachment 40 (illustrated). (Abbreviation).

Hereinafter, the sheet stretching apparatus 10 will be described in detail with reference to FIGS. As shown in FIG. 1, the apparatus main body 20 of the stretching apparatus 10 is attached to two parallel rails 98 extending along the length direction of the tunnel T. A traveling transfer device 90 is attached to the stretching device 10 and is configured to be movable in the tunnel T in the axial direction. The transfer device 90 includes a rail unit 9.
8 is provided so as to be able to move in a tunnel T by itself and to be horizontally movable as appropriate.

A sheet setting section 30 is attached to the transfer device 90. The seat installation section 30 is provided in the main body 2.
The frame frame 92 is fixed to the upper part of the frame 0 and the roll portion 31 is movably attached to the frame 92. The frame 92 is formed in a semicircular shape when viewed from the front, and is fixed in parallel to each other in the front and rear directions of travel of the apparatus main body 20. A guide rail 97 is fixed inside, and a rack mechanism (not shown) is arranged. It is configured. The frame 92 is formed by bending a steel material formed into a shape on which the roll portion 31 can be placed into a semicircular shape having a slightly smaller radius than the tunnel T.

On the other hand, in the roll section 31, FIGS.
As shown in FIG.
And a buffer material roll 3 made of felt-like non-woven fabric can be wound in a roll shape on the outer periphery.
2 is provided on the roll part main body 31a at the front part in the stretching direction,
A sheet roll 33 in which a waterproof sheet 1 made of a synthetic resin or the like can be wound in a roll shape on the outer peripheral portion is provided on a roll portion main body 31a at a rear portion in the stretching direction, and a punching machine 35 (in FIG. 4) are these cushioning material rolls 3
2 and the sheet roll 33 are arranged in a straight line along the length direction.

These punching machines 35 are provided with a roll base 31 via a slide base 36a which can be finely adjusted in the X and Y directions.
, A ring-shaped perforated portion 37 having a nichrome wire or the like attached to the tip of the air cylinder 36, and a suction for sucking the buffer material 34 punched in the perforated portion 37. (Not shown). The inner periphery of the perforated portion 37 is formed larger than the heat welding disk 2.

Further, a traversing device 61 is attached to the roll portion 31 on the roll portion main body 31a. The traversing device 61 includes a rotating pinion 62 that can run on a guide rail 97 at a lower portion, and a rotating motor 63 that is connected to the rotating pinion 62 and transmits a driving force. In its own width direction.

Further, a welding attachment 40 is provided on the roll portion 31 at the rear of the sheet roll 33 in the stretching direction.
Slide bases 40a, 40 that can be adjusted in X and Y directions
b. Further, a control unit is connected to the welding attachment 40 and the sheet installation unit 30. The welding attachment 40 is composed of a welding arm 42, which is, for example, an air cylinder and the like, which is attached to be able to expand and contract, and a welding device 41 attached to the tip of the welding arm 42.

In this welding device 41, a disc welding device 41a for generating an electromagnetic field to weld the waterproof sheet 1 to the heat welding disk 2, and a welding device 41a for generating an electromagnetic field to weld the overlapping portion 4 of the waterproof sheet 1 And a welding device 41b.

As shown in FIG. 4, the disk welding device 41a is a cylindrical member 70 rotatable along the direction in which it is stretched.
And the welding material 50 attached to the welding disk 2 on the coating surface
And a work coil 46 that generates an electromagnetic field and is welded to the waterproof sheet 1. This work coil 46
It is provided on the cylindrical body 70. In the work coil 46, for example, a total of eight upper coils 47 wound in a rectangular shape in a plan view are evenly arranged on the outer peripheral surface of the cylindrical body 70,
Further, a plurality of these eight upper coils 47 are fixed at the same position in the circumferential direction as the punching machine 35.

As shown in FIG. 5, the work coil 46 includes an upper coil 47 fixed to the upper surface of the cylindrical body 70 with a gap therebetween, and an inner gap between the upper coil 47 and the inner space of the cylindrical body 70. And a lower coil 48 fixed to each. The front and rear ends of the upper coil 47 and the lower coil 48 in the extending direction are overlapped with each other.

The circuit of the work coil 46 will be described with reference to FIG. One end of each of the upper coil 47 and the lower coil 48 of the work coil 46 is connected to a short-circuit ring 49. On the other hand, the upper coil 4
The other ends of the coils of the lower coil 7 and the lower coil 48 are connected to a conductive chip 59, respectively. These conductive chips 59
Is in contact with the power supply brush 51 and is rotatable in a direction along the outer circumference of the short-circuit ring 49. The conductive chip 59
Is a current collecting chip 59 connected to the high frequency power supply 53
b and another shorting tip 59a connected to the shorting ring 49
It is composed of The power supply brush 51 includes a short-circuit brush 51a for connecting the short-circuit ring 49 and the short-circuit tip 59a.
And a current collecting brush 51b for connecting the high frequency power supply 53 and the current collecting chip 59b.

That is, in the work coil 46, for example, one end of one upper coil 47 is connected to the current collecting chip 59b, and one end of the high frequency power supply 53 of the current collecting chip 59b is connected. Since the other end of the high-frequency power supply 53 is connected to the short-circuit ring 49, the other end of the one upper coil 47 is connected to the other end of the one upper coil 47 via the current collecting brush 51b connected to the short-circuit ring 49. A flux is generated in the coil 47 from the inside of the tubular body 70 to the outside in the radial direction. In the high frequency power supply 53, for example, a high frequency of 40 to 80 kHz generated by the high frequency transmitter 52 is sent to the preamplifier 54 as shown in FIG. The high frequency amplified by the preamplifier 54 is sent to the power amplifier 55, for example, 500
W power. The power amplified by the power amplifier 55 is sent to the matching circuit 56. This matching circuit 56
Is transmitted to the work coil 46.
The high-frequency transmitter 52, the preamplifier 54, and the power amplifier 5
5 is connected to a DC current 57 of, for example, 100 V and 15 A, respectively.

Here, power is supplied to one of the upper coil 47 and the lower coil 48, and the other coils 47, 48 are processed by the short-circuit ring 49. That is, in the short-circuit ring 49, the supplied magnetic field of, for example, the upper coil 47 causes the other coils 47, 4, 4
8 prevents the generation of a voltage induced by the voltage.

On the other hand, in the overlapping portion welding device 41b, FIG.
As shown in the figure, for example, an H-shaped rack 40c framed on the roll portion 31 along the traveling direction, and this rack 40c
A slide base 40b, which is provided with a pinion (not shown) that can be moved upward and that can be finely adjusted in the X and Y directions, is attached. An elastic welding arm 42 is mounted on the slide base 40b. A welding device 41b for the overlapping portion is attached to the tip of the welding arm 42.

As shown in FIG. 8, the overlapping portion welding device 41b includes a cylindrical member 73 rotatable along the direction in which it is stretched.
The work coil 46 is configured to weld the welding material 50 attached to the back surface of the waterproof sheet 1 to the waterproof sheet 1 by generating an electromagnetic field. The work coil 46 has a cylindrical body 73.
It is provided in. In the work coil 46, a total of eight upper coils 47 wound in a rectangular shape in a plan view are uniformly arranged on the outer peripheral surface of the cylindrical body 70. The work coil 46 is formed similarly to the circuit of the work coil 46 of the disk welding device 41a.

The cylindrical member 7 of the overlapping portion welding device 41b is
3 is directed in the longitudinal direction of the tunnel T by rotating the welding arm 42. The overlapping portion welding device 41b is not limited to the rear portion in the traveling direction of the device 10, but may be a front portion, or may be attached to both front and rear. In the stretching device 10, the welding device 41b for the overlapping portion and the welding device 41a for the disc are integrally attached to the roll portion 31. However, these are individually attached to the frame 92.
It may be attached to.

Here, the welding material 50 is made of iron, aluminum, copper, stainless steel, brass, a resin in which a ferromagnetic material is mixed or dispersed in the form of a thread, or the like. As shown in FIG. 10, it is applied in a ring shape, and is applied to the waterproof sheet 1 on two straight lines parallel to each other along the circumferential direction of the tunnel T as shown in FIGS.

Hereinafter, a method of stretching the waterproof sheet 1 in the tunnel T having a large cross section using the stretching device 10 of the present invention will be described. First, the heat welding disk 2 in which the welding material 50 is previously applied to the inner wall surface W is fixed in an appropriate position in advance. Next, a welding material 50 is applied to the front surface of the heat welding disk 2 and the back surface located at the overlapping portion 4 of the waterproof sheet 1 previously set and set on the upper side. Subsequently, as shown in FIG. 1, the stretching device 10 is set at a predetermined position on the inner wall surface W, and the waterproof sheet 1 on which the welding material 50 has been applied is mounted on the sheet installation section 30. The welding attachment 40 is always attached to the sheet installation section 30 with respect to the sheet installation section 30.
It is arranged on the front side of the waterproof sheet 1 pulled out from 0.

After the preparation is completed, as shown in FIG. 1, the frame device 92 is arranged perpendicular to the axial direction of the tunnel T, and the transfer device 90 is disposed substantially at the center of the tunnel T. Then, the horizontal movement mechanism is operated to equalize the distance between the frame 92 and the inner wall surface W, and on the guide rail 97 of the frame 92, the pinion for rotation of the stretching device 10 is attached to the rack mechanism of the frame 92. 62, and the stretching device 10 is installed at the stretching start position between the frame 92 and the inner wall surface W.

Next, the cushioning material 34 is wound from the cushioning material roll 32 provided at the front part in the stretching direction, and the cushioning material 34 is wound.
To the inner wall surface W. Then, the air cylinder 36 of the punching machine 35 is extended, and the perforated portion 37 is pressed against the buffer material 34 located at the position of the heat welding disk 2, the perforated portion 37 is heated, and the buffer material 34 is melted. Drill a hole. The punched cushioning material 34 is sucked by a suction machine, the air cylinder 36 is contracted, and the punched cushioning material 34 is separated from the waterproof sheet 1 and the cushioning material 34.
Collect.

On the cushioning material 34 having a hole formed therein, a waterproof sheet 1 is provided from a sheet roll 33 provided at a rear portion in the stretching direction.
Unwind and cover. In this rolled waterproof sheet 1,
The welding attachment 40 is pressed. In the welding attachment 40, the welding arm 42 is extended, and the waterproof sheet 1 is urged. By driving the welding arm 42, the cylindrical body 70 of the disk welding device 41 a is pressed against the waterproof sheet 1. Then, as the roll portion 31 moves along the stretching direction, the tubular body 70 is rotated at a constant speed while pressing the waterproof sheet 1, and
The welding material 50 attached to the welding disk 2 is heated to a welding temperature. Therefore, continuous welding is performed by the work coil 46 of the tubular body 70.

On the other hand, in the overlapping portion welding device 41b, regardless of the operation of the punching machine 35 of the disk welding device 41a, the welding arm 42 is driven to attach the overlapping portion welding device 41b to the overlapping portion 4 of the waterproof sheet 1. The tubular body 73 is pressed against the waterproof sheet 1. Then, as the roll portion 31 moves in the stretching direction, the tubular body 73 is rotated. Or
The tubular body 73 is rotated as it moves on the rack 41c in the traveling direction. At this time, the work material 46 of the cylindrical body 73 causes the welding material 50
Is heated to the welding temperature, and the overlapped portion 4 is continuously welded.

By supplying a current of an appropriate frequency from the high frequency power supply 53 to the work coil 46 while pressing the disk welding device 41a and the overlapping portion welding device 41b to the welding positions, the current by electromagnetic induction is applied to the welding material 50. Is generated, the welding material 50 is melted by Joule heat by the current, and the waterproof sheet 1 is welded to the heat welding disk 2 and the overlapping portion 4.

Hereinafter, the waterproof sheet 1 is welded to the heat welding disk 2 in the same manner as the waterproof sheet 1 is set.
On the other hand, the welding of the overlapping portion 4 is performed by pressing the waterproofing sheet 1 first and pressing the overlapping portion welding device 41b against the end of the overlapping portion 4 in a state where the cushioning material 34 is not interposed. Heating by electromagnetic induction is performed continuously while moving the overlapping portion welding device 41b in the stretching direction.

According to the stretching device 10 of the present invention, the roll portion 31 of the sheet setting section 30 is composed of the cushioning material roll 32, the sheet roll 33, and the punching machine 35. Stretched, this stretched cushioning material 3
4 is punched out, and the waterproof sheet 1 is stretched. For this reason, the cushioning member 34 can be easily stretched, and the cushioning member 3 is provided between the waterproof sheet 1 and the heat welding disk 2.
4 can be prevented, and the workability of stretching the cushioning material 34 can be improved.

When water leaks from the primary work due to the stretched cushioning material 34 and the waterproof sheet 1, water is quickly flowed along the circumferential direction of the tunnel T to prevent water diffusion and to prevent the water from being diffused. Prevent intrusion into the inside. In addition, the occurrence of cracks due to temperature shrinkage and drying shrinkage in the secondary work is prevented. For this reason, the safety in the tunnel T can be enhanced, and the placement of the secondary footwear material can be performed soundly.

The welding attachment 40 is attached to a rear portion of the roll portion 31 which is rotated along the circumferential direction of the tunnel T in the direction in which the roll portion 31 is extended. And the welding device 41 attached to the distal end of the arm 42, the cushioning material 34 and the waterproof sheet 1 of the roll part 31 are unwound and almost simultaneously with the cushioning material 34 and the waterproof sheet 1 into the tunnel T. It is stretched. Therefore, the cushioning material 34 and the waterproof sheet 1
Workability can be improved.

Further, in the welding device 4, since the work coils 46 are provided on the rotatable cylindrical bodies 70 and 73, the waterproof sheet 1 and the overlapping portion 4 can be continuously welded. Then, since the cylindrical bodies 70 and 73 press the waterproof sheet 1 and the overlapping portion 4, they are in line contact with the waterproof sheet 1 and the overlapping portion 4, and can be pressed with a large ground pressure.

Then, the tubular bodies 70 and 73 are
And the like, so that a welding position detecting device or the like becomes unnecessary, eliminating complicated welding position detection and alignment work, improving work efficiency, and shortening the construction period of the waterproof sheet 1 and the like. it can. Further, since the cylindrical bodies 70 and 73 are continuously contacted, the shape of the welding material 50 is not affected,
Even if the welding material 50 has a large area, it can be easily handled.

Further, since the tensioning device 10 automatically sets the waterproof sheet 1 and the cushioning material 34 by rotating the welding arm 42, the waterproof sheet 1 can be applied to a high place or an inner wall W facing upward. 1 can be easily extended, and the workability of the extension is improved. In addition, since the tubular bodies 70 and 73 of the welding attachment 40 can be continuously welded, the construction speed of the waterproof sheet 1 can be increased, the work efficiency can be increased, and the construction period of the waterproof sheet 1 can be shortened. Become.

Furthermore, in the sheet stretching apparatus 10, the welding by electromagnetic induction can be easily performed by adjusting conditions such as current, pressing force, and pressing time, so that the welding temperature and the welding time can be easily adjusted. The construction accuracy and the workability can be further improved without requiring skill. In addition, since the stretching device 10 does not need to insert a welding device on the back surface of the waterproof sheet 1 and does not generate an unnecessary gap between the inner wall surface W and the waterproof sheet 1, The sagging etc. is reduced and the quality of construction is improved. Next, by running on the frame 92, the stretching device 10 can always be located at a position where the waterproof sheet 1 can be stretched on the inner wall surface W. Therefore, even when the diameter of the tunnel T is large, the inner wall surface W
The waterproof sheet 1 can be easily stretched.

The stretching device 10 according to the embodiment may be applied to the stretching of the waterproof sheet 1 on a building structure covering surface other than the inner wall surface W of the tunnel T. In the above-described embodiment, the waterproof sheet 1 is stretched above the tunnel T, but may be applied to the lower part. It should be noted that a plurality of the cylindrical bodies 70 are provided, and the plurality of cylindrical bodies 7 are provided.
In the case where the inner wall surface W of the tunnel T has irregularities by providing the punching machine 0 along the inner wall surface W of the same tunnel T in the punching machine 35, one irregular body 70 covers the irregularities and the other cylindrical body 70 Can be directly subjected to welding work.

[0043]

As described above, according to the sheet stretching apparatus of the present invention, the welding attachment includes the welding arm formed to be extendable and contractable and the welding arm attached to the tip of the welding arm. Since the sheet is formed by the device, the sheet is stretched in the tunnel almost simultaneously with unwinding the sheet. For this reason, the sheet stretching workability can be improved. In addition, the sheet stretching device can stretch the sheet,
Since the welding attachment is rotated, the sheet can be easily stretched to a high place or an upwardly facing surface, improving the workability of the stretching and allowing the worker to work in a high place. Eliminating the need to do so increases work safety.

In the welding apparatus, since the work coil is provided on the rotatable cylindrical body, the sheets can be continuously welded. Since this cylindrical body presses the sheet, it comes into line contact with the sheet and can be pressed with a large ground pressure. Further, since the tubular body is continuously contacted with the sheet or the like, a welding position detecting device or the like is not required, and complicated welding position detection and positioning work are eliminated, work efficiency is improved, and the sheet Can be shortened.
Further, since the cylindrical body is in continuous contact, the shape of the welding material is not affected, and even a welding material having a large area can be easily handled.

Further, in the sheet stretching apparatus, welding by electromagnetic induction can be easily performed by adjusting conditions such as current, pressing force, and pressing time so that the welding temperature and welding time can be easily adjusted. No skill is required, and the construction accuracy and workability can be further improved. In addition, since the sheet stretching device does not need to insert a welding device on the back surface of the sheet, unnecessary gaps are not generated between the coated surface and the sheet, and the quality of construction is improved.

[Brief description of the drawings]

FIG. 1 is an overall front view showing a sheet stretching apparatus of the present invention.

FIG. 2 is a perspective view showing a part of the sheet stretching apparatus of the present invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a sectional view showing a tubular body of the welding device of FIG. 1;

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a circuit diagram of FIG. 4;

FIG. 7 is a circuit diagram showing a connection between the high-frequency power supply of FIG. 1 and a work coil.

FIG. 8 is a perspective view of a cylindrical body of the welding device for the overlapping portion.

FIG. 9 is a side view showing the heat welding disk after the sheet is attached.

FIG. 10 is a front view of FIG. 9;

FIG. 11 is a side view showing an overlapping portion of sheets.

FIG. 12 is a front view of FIG. 11;

FIG. 13 is a side view showing the heat welding disk fixed to the coating surface.

FIG. 14 is an overall view showing a conventional waterproof sheet stretched.

FIG. 15 is a side view showing welding of a conventional overlapping portion by an electrothermal welding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterproof sheet 2 Heat welding disk (welding position of coating surface) 10 Spreading device 20 Device main body 30 Sheet installation part 40 Welding attachment 41 Welding device 41a Welding device for disk 41b Welding device for overlapping part 42 Welding arm 46 Work coil 50 Welding material 70/73 Cylindrical body 92 Frame W Inner wall (coated surface) T Tunnel

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Exit Taneomi 1-3-2 Shibaura, Minato-ku, Tokyo Inside Shimizu Corporation (72) Inventor Yuichi Kikuchi 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu (72) Inventor Yasuyoshi Edahiro 2-2-1-17 Nishi-Nippori, Arakawa-ku, Tokyo Seidensha Electronics Corporation (72) Inventor Shigemasa Tone 2-2-2 Nishi-Nippori, Arakawa-ku, Tokyo No. 17 Seidensha Electronics Co., Ltd. (72) Inventor Kazuyuki Yoneya 2--17 Nishi-Nippori, Arakawa-ku, Tokyo Seidensha Electronics Co., Ltd. (72) Inventor Akio Ikuta Kita, Osaka City, Osaka 3-2-1, Nishitenma-ku, KFC, Inc. (72) Inventor Toru Hama 3-2-1, Nishitenma, Kita-ku, Osaka-shi, Osaka KFC, Inc. (72) Inventor Cherry Blossoms Hiroshi 1-6-8 Akasaka, Minato-ku, Tokyo Cabo For Japan Co., Ltd. (72) Inventor Keisuke Morita 1-6-8 Akasaka, Minato-ku, Tokyo Cabo For Japan Co., Ltd. (56) References Special Kaisho 60-16700 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A running attachment, a sheet installation unit for pressing and spreading a sheet on a covering surface, a welding attachment equipped with a welding device for welding the sheet, and controlling the operation of the sheet installation unit and the welding attachment. The welding attachment comprises a welding arm formed to be extendable and contractable, and a welding device attached to a tip end of the welding arm. The welding device includes a rotatable cylindrical body, and a work coil that melts a welding material attached to a welding position on the coating surface or the back surface of the sheet and welds the sheet to the sheet. A sheet stretching device provided on a sheet.