JP2005342958A - Branch pipe lining material and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein the welded part between a branch pipe lining material and a peeling tube is weak, the problem wherein slight "wrinkles" or the like occur in the welded part of the branch pipe lining material and the peeling tube at the time of temporary welding and the problem wherein the branch pipe lining material can not be accurately set. <P>SOLUTION: The branch pipe lining material has a tubular resin absorbing material wherein the outer surface constituting a tubular lining material is covered with a highly airtight plastic film, a flange formed by impregnating the tubular resin absorbing material, wherein one end of the tubular lining is folded back and the plastic film is peeled, with a liquid curable resin and curing the impregnated tubular lining material and the tubular welding member provided to one end of the peeling tube in the vicinity of the flange in order to shield a fluid, and the tubular welding member is welded or bonded to the surface of the plastic film in a state that wrinkles are removed by stretching the plastic film and the tubular welding member. The manufacturing method of the branch pipe lining material is also disclosed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is an improved invention relating to a method of manufacturing a branch pipe lining material used for repairing a branch pipe such as an aged sewer pipe.

  As a prior art, in Japanese Patent Application Laid-Open No. 4-355115, “branch lining material and its manufacture”, a branch lining in which one end portion of the branch lining material is folded back and a peeling tube is attached in the vicinity of the brim. The material is disclosed.

Specifically, the above-mentioned “branch lining material and method for producing the same” includes the vicinity of the lining of the tubular lining material in which the formed ridge is impregnated with a curable resin and the inner and outer surfaces are covered with a highly airtight film. The branch pipe lining material is characterized in that it is constructed by attaching one end of a tear-off tube.

Conventionally, a large fluid pressure is applied to the welded portion between the branch lining material and the peeling tube by applying a fluid pressure. The welded part of the branch pipe lining material and the peeling tube is the weakest part against the fluid pressure because of temporary welding.

When the thickness of the branch pipe lining material is large, it is necessary to pump more fluid pressure such as air. The case where the fluid pressure needs to be fed includes the case where the branch pipe lining material is inverted and inserted into the branch pipe, and the case where the branch pipe lining material is cured.

However, when performing branch pipe lining construction by the above-mentioned “manufacturing method of branch pipe lining material”,
First, because the branch pipe lining material and the peeling tube are temporarily welded, the welding force is extremely weak. Also, the temporary bonding portion of each of the branch pipe lining material and the peeling tube is simply aligned at one end, and is flat and tensioned. Since welding or welding was carried out without being in a state, there was a very large problem that a slight “wrinkle” or the like was generated and fluid such as air leaked.

  Second, as described above, “wrinkles” or the like are generated, and when the peeled tube and the branch pipe lining material are temporarily welded while the airtightness of the temporary bonding portion is lost, the final production of the branch pipe lining material is completed. In addition, there has been a problem in that the branch pipe lining material cannot be constructed due to poor welding at the welded portion of the branch pipe lining material and the peeling tube.

Thirdly, branch pipes such as sewers are connected to the branch pipe and main pipe connection section having a connection angle of 60 ° or less where the connection angle with the main pipe is steep, or to the main pipe of φ200 mm and small diameter The branch pipe lining material cannot be accurately set to the branched pipe.
JP-A-4-355115

  The problem to be solved by the present invention is that the welded portion between the branch pipe lining material and the peeling tube is weak, and at the time of temporary welding, a slight "wrinkle" is present in the welded portion of the branch pipe lining material and the peeled tube. The problem of causing the pipe lining material to become unworkable when the fluid pressure is applied if the tear tube and the branch lining material are temporarily welded while the wrinkles are generated. This is to solve the problem that the branch lining material cannot be accurately set to the branch pipe opening inclined from the main pipe such as a sewer pipe to the branch pipe.

In order to solve the above problems, the present invention folds one end of the tubular lining material 10 and the tubular resin absorbent material 4a in which the outer surface constituting the tubular lining material 10 is covered with a highly airtight plastic film 3a. The tubular resin absorbent 4a from which the plastic film 3a has been peeled off is impregnated with a liquid curable resin and cured, and in the vicinity of the flange 3e, one end of the tear-off tube 4 is provided to block the fluid. And the tubular lining material 10 and the plastic film 3a constituting the tubular lining material 10 are combined, and the tubular lining material 10, the plastic film 3a, and the tubular welding member 5 are stretched with wrinkles. In the state, the tubular welding member 5 is welded or adhered to the surface of the plastic film 3a, and the drawing is performed. The peeling tube 4 is attached to the structure of the lateral pipe lining material according to claim.

  First, a tubular welding member is provided on the peeling tube, and fluid pressure is applied to the pressure bag 6 so that each of the already welded or bonded tubular lining material, peeling tube, and welding member can be stretched together. Since the part can be welded or adhered while keeping one end and being kept in a tension state, generation of wrinkles and the like can be prevented.

  Secondly, the welding member is covered with a release sheet, and the entire welding member is uniformly heated by the contact-type circular heater 8, so that the welding unevenness of the “welding member” is eliminated and the entire welding member can be firmly welded.

  Thirdly, even when the branch pipe opening extending from the main pipe such as a sewer pipe toward the upper surface has an inclination angle, one end of the peeling tube that can freely change the mounting angle is hatched, wavy, etc. Since it is a branch pipe lining material having a ridge provided with a welding member, it is possible to accurately set the branch pipe lining material.

  The present invention has a problem that the welded portion between the branch pipe lining material and the peeling tube is weak, a problem of causing slight wrinkles in the welded portion of the branch pipe lining material and the peeled tube at the time of temporary welding, etc. The tubular resin lining material is covered with a highly airtight plastic film on the outer surface thereof, and one end of the tubular lining material is folded, and the plastic resin film is peeled off and the liquid resin is removed. A crease impregnated with a curable resin and a tubular welding member provided at one end of a peeling tube for barriering the fluid are provided in the vicinity of the crease and stretched together with the plastic film and the welding member. This was realized by welding or adhering the tubular welding member to the surface of the plastic film in a stretched state.

  The details of the pipe branch lining and the manufacturing method thereof according to the present invention will be described below with reference to the accompanying drawings. First, the manufacturing method of the peeling tube 4 which comprises this invention in FIG. 1 is demonstrated easily.

  As shown in FIG. 1, the peeling tube 4 includes a plastic film 2 welded so as to cover an outer surface, and a tubular fibrous material that is a tubular nonwoven fabric or a tubular woven fabric or a mixture welded to the plastic film 2. It is a tube comprising a body 3 and is characterized by comprising a tubular welding member 5 which overlaps with an end portion of the plastic film 2 and a welded portion 5a protrudes from the end portion. The peeling tube 4 may be a plastic film alone as a material. The peeling tube 4 may be a tear tube.

  The plastic film 2 is made of a material such as a composite film containing polyethylene, polyethylene, polyurethane, or PCV (vinyl chloride). The tubular fibrous body 3 constituting the peeling tube 4 is composed of a tubular nonwoven fabric made of plastic fibers such as polyester, acrylic, vinylon, or a fibrous body such as woven fabric.

The release sheet 7 is a stretchable strip-shaped plastic sheet with high heat resistance that covers the entire outer surface of the welding member 5. In addition, in order to make peeling of the peeling sheet 7 easy, you may temporarily fix an edge part with a tape etc.

Further, a ring-shaped circular heater 8 is provided on the outer periphery of the welding member 5 in order to temporarily and temporarily bond the outer periphery of the release sheet 7 and the welding member 5. The circular heater 8 includes an electric cord 8a outside, and the entire release sheet 7 may be omitted by coating the inner surface with fluorine coating or the like.

Since the entire welding member can be uniformly heated by the contact-type circular heater 8, uneven welding of the welding member 5 can be eliminated. In addition, you may weld by moving a flat thermal heater manually.

The welding member 5 is composed of a composite film containing polyurethane, vinyl chloride (PVC), polyethylene film, nylon, ethylene-vinyl alcohol copolymer (EVOH), polybutylene-terephthalate (PBT), polyethylene, and heat of the circular heater 11. Can be attached to the peeling tube 4 by welding.

Further, when the welding member 5 is peeled off and welded to the tube 4, the welding member may be directly heated with hot air or the like. Further, instead of the welding member 5, an adhesive member (not shown) that can be attached with an adhesive (not shown) may be used.

  Note that air is supplied to the inner surface of the peeling tube 4 from a compressor 9 having an air hose 9a, and a pressure bag 6 that is cylindrical by pressurization for opening the inner surface of the peeling tube 4 is provided. I have.

The pressure bag 6 is provided with an air tube 9b for supplying air from the compressor 9 to the end 6a, and is inflated by the air so that the internal pressure of the cavity 6b portion in the pressure bag 6 becomes equal. ing. This is because the peeling tube 4 is opened by applying the internal pressure. The internal pressure of the pressure bag 6 is set to 0.003 mpa to 0.05 mpa.
Next, the details of the method for manufacturing the peel tube constituting the present invention will be described.

  As shown in FIG. 1, the manufacturing method of the peeling tube 4 according to the present invention is such that the left end portion of the plastic film 2 constituting the outer surface of the peeling tube 4 is the right end portion of the welding member 5 made of plastic or the like. It is attached in advance so as to overlap with the position.

The attachment method of the welding member 5 that constitutes the method of manufacturing the peel tube is such that the weld portion 5a is left and the welding member is a short tubular plastic film at the left end portion of the plastic film 2 constituting the outer surface of the peel tube 4 Set so that the right end of 5 is covered.

  Next, in order to spread the welded portion 5a where the plastic film 2 which is the outer surface of the peeling tube 4 and the tubular short plastic film overlap, a pressure back 6 which is cylindrically formed by pressurization inside the peeling tube 4 is provided. Insert and apply fluid pressure such as air.

Inside the pressure bag 6, fluid pressure is applied from the compressor 9 through the air hose 9 a, so that the peeling tube 4 that becomes the lower surface of the tubular welded portion 5 a is expanded by the pressure bag 6 together with the tubular welded portion 5 a. Then, the peeling tube 4 and the welding member 5 are both expanded, and the tubular welding member 5 is welded or bonded to the surface of the plastic film 2 with a circular heater 8 in a state where the wrinkles are stretched. 4 can be obtained. Next, the manufacturing method of the pipe lining material constituting the present invention will be described in detail.

In the method of manufacturing the pipe lining material, after the welding of the welding member 5 is finished, the tubular fibrous body 3 that is the inner surface of the peeling tube 4 and the plastic film 2 that is the outer surface are reversed by hand. Next, the welding situation after reversal of the branch pipe lining material will be described with reference to FIG.

As shown in FIG. 2, the peeling tube 4 whose outer surface is inverted like a plastic film 2 and whose inner surface is a tubular fibrous body 3 is an outer peripheral length of the tubular lining material 10 and an inner peripheral length of the peeling tube 4 and welding. The inner peripheral length of the member 5 is set substantially the same.

From the one end of the tubular lining material 10 on the side where the ridge is formed before the impregnated curable resin is impregnated with the right end portion of the welding member 5 and the inner surface of the peeled tube 4 and the outer surface of the tubular lining material 10 which are welded. The tearing tube 4 is inserted from the right side.

The tubular lining material 10 includes a tubular resin absorbent material 4a made of any one of a tubular nonwoven fabric such as polyester fiber, glass fiber, acrylic fiber, and vinylon fiber, or a mixture thereof, and the outside of the tubular resin absorbent material 4a. It consists of a plastic film 3a covering the surface. When the tubular lining material 10 is peeled off and inserted into the tube 4, a gap 4b is provided between the plastic film 2 and the plastic film 3a.

As shown in FIG. 2, the plastic film 3a covering the outer surface of the tubular resin absorbent material 4a constituting the tube lining material 10 is firmly welded to the tubular resin absorbent material 4a. The peeling tube 4 in which one end of the welding member 5 is welded to the end portion and the welding portion 5a is provided, and the inserted tubular lining material 10 are the tubular lining material 10, the peeling tube 4, and the welding member 5 at the same time in the pressure bag 6. Expand and weld as is. The entire outer surface of the welding member 5 can be covered with the release sheet 7 so that the plastic film 3a melted in the circular heater 8 does not adhere.

  The circular heater 8 that comes into contact with the entire outer surface of the release sheet 7 expands the pressure bag 6 inserted into the tubular lining material 10 and then heats the circular heater 8 so that the welding member 5 becomes the tubular lining material 10. It can be welded, and a desired branch pipe lining material can be obtained.

The circular heater 8 is brought into contact with the circular lining material 10, the welding member 5, and the release sheet 7 in the state of being laminated in a sandwich shape, and the temperature of the circular heater 8 is controlled at 120 ° C. to 150 ° C. The release sheet 7 and the circular heater 8 are removed while welding, and the welding between the tubular lining material 10 and the peeling tube 4 by the welding member 5 is completed.

  At this time, by using the circular heater 8 having a function of little change in inner peripheral length even when a load such as pressure is applied, pressure deformation, thermal deformation, excessive expansion, etc. of the tubular lining material 1 can be prevented. Can do. In addition, pressure deformation, thermal deformation, excessive expansion, and the like can be similarly prevented with respect to the welding member 5 attached to the lower surface of the plastic film 2 constituting the peeling tube 4. In addition, the pipe lining material 10 and the peeling tube 4 which were welded by the welding member 5 are shown in FIG.

As shown in FIG. 3, the left end portion of the tubular lining material 10 whose end portion is welded with the welding member 5 forms a wrinkle formation allowance 3b (50 mm to 100 mm) that opens in a petal shape, and the right end of the pipe lining material 10 The part is in a state of being inserted into the inner surface of the peeling tube 4.

FIG. 4 is a longitudinal sectional view showing the plastic film peeled off from the surface of the pipe lining material in the first embodiment constituting the branch pipe lining material and the manufacturing method thereof according to the present invention.
As shown in FIG. 4, the plastic film 3a is respectively peeled outward at one end of the pipe lining material 10, spread in a petal shape, infiltrated with a liquid curable resin, and a wrinkle is formed from the wrinkle formation allowance 3b. The peeling tube 4 has the plastic film 2 welded to the outer surface of the tubular fibrous body 3, and a welding member 5 attached to the end.

Next, FIG. 5 and FIG. 6 show the details of the enlarged view of the second embodiment of the branch pipe lining material and the branch pipe lining material welding member constituting the branch pipe lining material and the manufacturing method thereof according to the present invention. explain.

FIG. 5 is an enlarged view of the welding member 5 constituting the branched tubular lining material 1.
The peeling tube 4 provided with the welding member 5 is in a state where a tubular lining material 10 is inserted. The tip portion of the plastic film 3a covering the surface of the tubular lining material 10 is provided with an arc-shaped ridge forming allowance 3b, and a plurality of cuts 3c are made in the longitudinal direction of the ridge forming allowance 3b. The wrinkle formation allowance 3b with the cut 3c is the tubular resin absorbent 4a from which the plastic film 3a has been peeled off.

The welding member 5 adjacent to the wrinkle formation allowance 3b is processed in a straight line along the diameter of the tube of the tubular lining material 10 by the width of the wrinkle formation allowance 3b of the tubular lining material 10. In addition, as shown in FIG. 6, the shape of the welding member 5 is not limited to a linear shape, and may be a wavy shape or a diagonal shape. Therefore, the shape of the flange forming allowance 3b and the welded portion 5 can be freely changed in accordance with the mounting angle at the junction between the branch pipe and the main pipe and the shape of the inner diameter of the main pipe.

That is, for a branch pipe having a connection angle of 60 ° or less where the connection angle with the main pipe, which is the third problem of the present invention, or a branch pipe connected to the main pipe of φ200 and small diameter The branch pipe lining material 1 can be accurately set. Next, the details of the longitudinal sectional view of the tip of the branch pipe lining material 11 constituting the branch pipe lining material and the manufacturing method thereof according to the present invention will be described with reference to FIG.

As shown in FIG. 7, the end of the branch pipe lining material 11 is a tube in which the outer surface inverted to a substantially M-shape is a tubular resin absorbent material 4a and the inner surface is a plastic film 3a. The curved surface 3d of the plastic film 3a which is provided with the lining material 10 and is folded back as an inner surface is provided with a bent welding member 5 and a peeling tube 4 hanging from the welding member 5. .

A longitudinal section of the peeling tube 4 is shown in FIG. As shown in FIG. 9, like the tubular lining material 10, the outer tube 14 is airtightly covered by welding a plastic film to the outer surface of the tubular resin absorbent material 3. Next, in FIG. 7 and FIG. 8, the detail of the longitudinal cross-sectional view of the front-end | tip of the branch pipe lining material which comprises the branch pipe lining material and its manufacturing method which are this invention is demonstrated.

  As shown in FIG. 7, the substantially M-shaped tubular lining material 10 is provided with a heel forming allowance 3 b outward in the vicinity of the lower opening of the outer tube 14, and the lower surface of the heel forming allowance 3 b is The outer tube 14 is firmly fixed to the opening 12 of the outer tube 14 with a substantially L-shaped mold 12.

As shown in FIG. 7, the upper mold 12 is pressed against the wrinkle formation allowance 3 b so as to be perpendicular to the outer tube 14, and the liquid curable resin 13 is formed from the upper surface of the petal-shaped wrinkle formation allowance 3 b. Is dripped or impregnated.

When a certain time has elapsed, the ridge forming allowance 3b forms a cured ridge 3e (not shown), and the branch pipe lining material desired by the present invention is completed. When the wrinkle formation allowance 3b is hardened, the upper surface of the wrinkle formation allowance 3b can be finished smoothly. The curable resin 13 is made of unsaturated polyester or epoxy resin.

  As described above, by providing the peeling tube 4 provided with the welding member 5 on the curved surface 3d of the branch pipe lining material 11, the fluid pressure at the time of reversal becomes as high as (0.1 to 0.3 mpa). However, “wrinkles” and the like do not occur, and poor welding between the branch pipe lining materials does not occur.

FIG. 8 shows that the outer tube 14 is a member in which a plastic film 14b is welded to the outer surface of the tubular fiber 14a. One end of the outer tube 14 is attached to the plastic film 14b by the same method as the pipe lining 10 material. It may be peeled off, expanded into a petal shape, overlapped with a ridge forming allowance 3b at one end of the tube lining material, impregnated with a liquid curable resin 13, and combined and cured.
Next, FIG. 10 shows a perspective view of the tip of the branch pipe lining material constituting the branch pipe lining material and the manufacturing method thereof according to the present invention.

  As shown in FIG. 10, the branch lining material 11 constituting the present invention includes a tubular resin absorbent material 4a in which an outer surface constituting the tubular lining material 10 is covered with a highly airtight plastic film 3a, and the tubular lining material. The tubular resin absorbent 4a from which one end of 10 is folded and the plastic film 3a is peeled off is impregnated with a liquid curable resin to be cured in a petal shape, and the fluid pressure is barriered in the vicinity of the collar 3e. And the tubular lining material 10 is combined with the plastic film 3a, and the tubular lining material 10, the plastic film 3a, and the tubular welding member 5 are wrinkled. The tubular welding member 5 is welded or adhered to the surface of the plastic film 3a in a tension state, and the peeling is performed. And the configuration of the branch pipe liner bag 11, characterized in that the tube 4 is attached. Next, in FIG. 11 and FIG. 12, the details will be described with a longitudinal sectional view showing the branch pipe lining material according to the present invention and the method of manufacturing the branch pipe lining material constituting the manufacturing method thereof.

As shown in FIGS. 11 and 12, reference numeral 15 denotes a main pipe, and reference numeral 16 denotes a small-diameter branch pipe 16 branched from the main pipe 15. Inside the main pipe 15, as shown in FIGS. The robot 17 and the branch pipe lining material 11 are drawn in, and a television camera 18 for monitoring is suspended inside the branch pipe 16.

The robot 17 is a hydraulically driven device. The head 20 rotates in the vertical and horizontal directions, and the head 20 is provided with a fluid pressure sealing nozzle 20a. A tow rope 17a is tied, and a monitor television camera 19 and a light 21 are attached to the robot 17.

  The branch pipe lining material 11 is set in the fluid pressure sealing nozzle 20. That is, in the branch pipe lining material 11 used in the present invention, the flange 3e is set on the fluid pressure sealing nozzle 20a, and the other part extends through the fluid pressure sealing nozzle 20a as shown in FIG. The pressure bag 22 is housed.

One end of the reversing pressure bag 22 is attached to the fluid pressure sealing nozzle 20a, the other end is closed with a cup 23, and a compressor 25 is connected to the inside via an air hose 25a. Further, a tubular sealing pressure bag 24 that can be expanded and contracted is attached to the outer periphery of the reversing pressure bag 22, and a compressor 26 is connected to the sealing pressure bag 24 via an air hose 26 a. Yes. Reference numeral 23a denotes a tow rope 23a having one end tied to the cup 23.

By pulling the tow ropes 17a and 23, the robot 17 and the branch pipe lining material 11, the reversing pressure bag 22 and the like designated by the robot 17 move integrally inside the main pipe 15, While monitoring the inside of the branch pipe 16 and the main pipe 15 by 19, the flange 3 e of the branch pipe lining material 11 is pressed against the inner wall of the main pipe to bring it into close contact.

Next, when the compressor 25 is driven and the compressed air is supplied into the reversing pressure back 22 through the air hose 25a, the branch pipe lining material 11 receives the fluid pressure of the compressed air and reverses the inside of the branch pipe 16 while reversing. The tube 15 is sequentially inserted toward the ground side (upward).

When the inverted insertion of the branch pipe lining material 11 into the branch pipe 16 is completed over its entire length, the upper end of the branch pipe lining material 11 is pulled up to the ground using the rope 27 as shown in FIG. The fluid pressure sealing nozzle 20a is separated from the branch pipe lining material 11 while being fixed to the inner wall.

That is, from the state shown in FIG. 11, the head 20 of the robot 17 is moved downward to separate the fluid pressure sealing nozzle 20a from the flange 3e of the branch pipe lining material 11, and then the tow ropes 17a and 23a shown in FIG. 11 are pulled. Then, as shown in FIG. 12, the robot 17, the fluid pressure sealing nozzle 20a, the reversing pressure bag 22 and the like are moved to the right inside the main pipe 15, and the sealing pressure bag 24 is positioned at the opening of the branch pipe 16. .

When the sealing pressure bag 24 is positioned at the opening of the branch pipe 16, the compressor 26 is driven and supplied into the sealing pressure bag 24 through the air hose 26a. Then, the sealing pressure bag 24 is inflated by the compressed air, and the lower opening of the branch pipe lining material 11 is sealed by the sealing pressure bag 24. The following steps are omitted because they are publicly known.

It is a longitudinal cross-sectional view of 1st Example which comprises the peeling tube which is this invention, and its manufacturing method. It is the longitudinal cross-sectional view which showed welding of pipe lining material in 1st Example which comprises the branch pipe lining material which is this invention, and its manufacturing method. It is the longitudinal cross-sectional view which peeled off the pipe lining material in 1st Example which comprises the branch pipe lining material which is this invention, and its manufacturing method, and was attached to the tube. It is the longitudinal cross-sectional view which showed peeling the plastic film from the surface of the pipe lining material in 1st Example which comprises the branch pipe lining material which is this invention, and its manufacturing method. It is an enlarged view of the welding member of the branch pipe lining material which comprises the branch pipe lining material which is this invention, and its manufacturing method. It is an enlarged view of 2nd Example of the welding member of the branch pipe lining material which comprises the branch pipe lining material which is this invention, and its manufacturing method. It is a longitudinal cross-sectional view of the front-end | tip of the branch pipe lining material which comprises the branch pipe lining material which is this invention, and its manufacturing method. It is a longitudinal cross-sectional view of the front-end | tip of the branch pipe lining material which comprises the branch pipe lining material which is this invention, and its manufacturing method. It is CC longitudinal cross-sectional view of the front-end | tip of the branch pipe lining material which comprises the branch pipe lining material which is this invention, and its manufacturing method. It is the perspective view which showed the front-end | tip of the branch pipe lining material which comprises the branch pipe lining material which is this invention, and its manufacturing method. It is the longitudinal cross-sectional view which showed the construction method of the branch pipe lining material which comprises the branch pipe lining material which is this invention, and its manufacturing method. It is the longitudinal cross-sectional view which showed the construction method of the branch pipe lining material which comprises the branch pipe lining material which is this invention, and its manufacturing method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Peeling tube 2 Plastic film 3 Tubular fibrous body 3a Plastic film 3b Claw formation allowance 3c Cut 3d Curved surface 3e Cage 4 Peeling tube 4a Tubular resin absorbent material 4b Gap 5 Welding member 5a Welding part 6 Pressure bag 6a End part 6b Cavity 7 Release sheet 8 Circular heater 8a Electrical cord 9 Compressor 9a Air hose 9b Air tube 10 Tubular lining material 11 Branch pipe lining material 12 Form 13 Curable resin 14 Outer tube 14a Tubular fiber 14b Plastic film 15 Main pipe 16 Branch pipe 17 Robot 17a Tow rope 18 TV camera 19 TV camera 20 Head 20a Fluid pressure sealing nozzle 21 Light 22 Reverse pressure bag 23 Cup 23a Tow rope 24 Sealing pressure bag 25 Compressor 25a Air Hose 26 compressor 26a air hose 27 rope

Claims (3)

  Liquid curing is applied to the tubular resin absorbent material in which the outer surface constituting the tubular lining material is covered with a highly airtight plastic film and the tubular resin absorbent material in which one end of the tubular lining material is folded and the plastic film is peeled off. And the plastic film constituting the tubular lining material, which are composed of a cocoon impregnated with a conductive resin and a tubular welding member provided at one end of the peeled tube for barriering the fluid in the vicinity of the cocoon. The tubular lining material, the plastic film, and the tubular welding member are each stretched to be tensioned, and the tubular welding member is welded or bonded to the surface of the plastic film in a state where wrinkles are stretched, and the peeling tube Branch pipe lining material characterized in that is attached. Insert an end portion of the tubular lining material before impregnation and resin impregnation into the peeling tube, and attach a tubular welding member provided at one end of the peeling tube and a plastic film covering the outer surface of the tubular lining material. The plastic film is placed so as to be overlapped, a pressure bag is inserted into the tubular lining material, fluid pressure is applied to the pressure bag, the tubular welding member is expanded together, and wrinkles are stretched. Branch pipe lining material manufacturing method capable of obtaining a desired branch pipe lining material by welding or bonding the tubular welding member to the surface An end portion of the tubular lining material before the wrinkle formation allowance and resin impregnation is inserted into the peeling tube, a tubular welding member provided at one end of the peeling tube, and a plastic film covering the outer surface of the tubular lining material Cover the entire outer surface of the tubular welding member with a release sheet so that the plastic film does not adhere to the inner surface of the circular heater during welding, and provide a circular heater so that the entire outer surface of the release sheet is in contact The branch pipe lining material manufacturing method which can obtain a desired branch pipe lining material by heating a circular heater.

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