JP2012096457A - Branch pipe lining material and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch pipe lining material that enables a flange to be formed at an end of a pipe-like resin absorber by a simple method, and a method of manufacturing the same.SOLUTION: The pipe-like resin absorber 2 having an outer peripheral surface coated with a plastic film 4 is made. A cylindrical part 3b of the flange 3 made of a thermoplastic resin capable of being thermally welded to the plastic film of the pipe-like resin absorber tightly adheres to the plastic film at one end of the pipe-like resin absorber. The thermoplastic resin of the flange and the plastic film of the pipe-like resin absorber are thermally welded to each other by a heater 5 so that the flange can be connected to the one end of the pipe-like resin absorber. The pipe-like resin absorber connected to the flange is impregnated with a liquid hardening resin so that the branch pipe lining material can be manufactured.

Description

  The present invention relates to a branch pipe lining material used for rehabilitating a branch pipe branched from a main pipe and a method for manufacturing the branch pipe lining material.

  Branch pipe lining method is known for repairing without digging the main pipe or branch pipe when the branch pipe branching from the main pipe such as sewer pipes and water pipes buried in the ground is aged ( Patent Document 1).

  In this method, a ridge formed at one end of a tubular branch lining material built in a pressure bag is set on a head collar of a working robot introduced into the main pipe, and the main robot is driven by driving the working robot. It is closely attached to the peripheral edge of the branch pipe opening. Compressed air is supplied into the pressure bag, the branch pipe lining material is inserted into the branch pipe toward the ground, and the branch pipe lining material is heated while being pressed against the inner peripheral surface of the branch pipe. When the thermosetting resin is cured, the inner peripheral surface of the branch pipe is repaired by the cured branch pipe lining material.

  Such a branch pipe lining material is composed of a tubular flexible resin absorbent material impregnated with a liquid curable resin, and on its outer peripheral surface (when the branch pipe lining material is inverted, it becomes an inner peripheral surface). Is coated with a highly airtight plastic film. One end of the branch pipe lining material is folded back to the outside, and the resin impregnated in that portion of the resin absorbent material is cured at the time of shipment to form a hard bag.

  Such a branch pipe lining material has a drawback that mass production is difficult because the tubular resin absorbent material and the ridge are integrally formed. Then, the method of manufacturing a branch pipe lining material by manufacturing separately the ridge of a branch pipe lining material and a resin absorber, and couple | bonding it later is proposed (patent document 2).

JP 2006-123547 A JP 2000-37777 A

  However, since the branch pipe lining material as described in Patent Document 2 spreads one end of the tubular resin absorbent material and sandwiches and fixes the spread end portion between the two flange members, In addition, there is a problem in that the fixing of the tubular resin absorbent material is devised, and two hook members are required.

  The present invention has been made to solve such problems, and a branch pipe lining material capable of forming a ridge at the end of a tubular resin absorbent material by a simple method and the production of the branch pipe lining material. It is an object to provide a method.

The present invention
A ridge is formed at one end of a flexible tubular resin absorbent material impregnated with a liquid curable resin, and is inserted into the branch pipe in close contact with the periphery of the branch pipe opening of the main pipe that intersects the branch pipe. A branch pipe lining material for lining a branch pipe,
The ridge is formed from a thermoplastic resin;
The peripheral surface of the tubular resin absorbent material is coated with a plastic film that can be heat-welded with a ridge,
The scissors are thermally welded to the plastic film by heat welding, and the scissors are integrally bonded to the tubular resin absorbent material.

The present invention also provides:
A crease is formed at one end of a flexible tubular resin absorbent material impregnated with a liquid curable resin, and the crease is brought into close contact with the periphery of the branch pipe opening of the main pipe intersecting with the branch pipe and inserted into the branch pipe. A method of manufacturing a branch pipe lining material,
A tubular resin absorbent material whose outer peripheral surface is coated with a plastic film is produced,
A bag made of a thermoplastic resin capable of being thermally welded to the plastic film is brought into close contact with the plastic film at one end of the tubular resin absorbent material,
The thermoplastic resin of the coffin and the plastic film of the tubular resin absorbent material which are adhered are thermally welded to bond the coffin to one end of the tubular resin absorbent material.
A branch pipe lining material is manufactured by impregnating a tubular resin absorbent combined with a ridge with a liquid curable resin.

  In the present invention, the ridges of the branch pipe lining material are formed from a thermoplastic resin, and the peripheral surface of the tubular resin absorbent material is coated with a plastic film that can be thermally welded to the ridges. The scissors of the branch pipe lining material are thermally welded to the plastic film by heat welding, and the scissors are integrally bonded to the tubular resin absorbent material, so that the tubular resin absorbent material and the scissors are easily integrated with a small number of members. A branch pipe lining material can be obtained.

It is the side view which showed the external appearance of the main lining material which lines a main pipe in the partial cross section. It is explanatory drawing which shows the inside of the main pipe lined using the main pipe lining material of FIG. It is explanatory drawing which shows a main pipe | tube when opening the branch pipe opening part of the main pipe | tube lined. It is a perspective view of the branch pipe lining material which lines the branch pipe which cross | intersects a main pipe. It is explanatory drawing which shows the manufacturing process of a branch pipe lining material. It is explanatory drawing which showed the Example which attaches a collar to a tubular resin absorber. It is explanatory drawing which showed the process of impregnating resin to the tubular resin absorber of a branch pipe lining material. It is explanatory drawing which showed the other Example which attaches a collar to a tubular resin absorber. It is a perspective view which shows the head collar attached to a working robot and in which a branch pipe lining material is set. (A) is a perspective view which shows a state when a heater is set to a head collar, (b) is a perspective view when a branch pipe lining material is set on a heater. It is explanatory drawing which showed the process of lining a branch pipe with a branch pipe lining material. It is explanatory drawing which showed the process of lining a branch pipe with a branch pipe lining material. It is explanatory drawing which showed the process of lining a branch pipe with a branch pipe lining material. It is sectional drawing which shows the lining of the branch pipe opening peripheral part of a main pipe in detail. It is sectional drawing seen from the direction orthogonal to FIG. 14 which shows the lining of the branch pipe opening peripheral part of a main pipe in detail. It is a perspective view which shows the other Example of a main pipe lining material. It is explanatory drawing which shows the inside of a main pipe | tube when opening the branch pipe opening part of the main pipe | tube lined with the main pipe lining material of FIG. It is sectional drawing which shows the lining of the branch pipe opening peripheral part of a main pipe in detail. It is sectional drawing seen from the direction orthogonal to FIG. 18 which shows the lining of the branch pipe opening peripheral part of a main pipe in detail.

  In the following description, an embodiment of a branch pipe lining material, a branch pipe lining method and an apparatus for lining a branch pipe branched from a main pipe will be described with reference to the drawings. The main pipe is an existing pipe such as a sewer, a water supply, an agricultural waterway, and the branch pipe is an attachment pipe that is attached to the main pipe and extends from the main pipe to the ground.

  In FIG. 1, a main lining material 20 for lining a main pipe is shown partially in cross section. The main pipe lining material 20 includes a tubular resin pipe 20a having an outer diameter smaller than the inner diameter of the main pipe, and a reinforcing protrusion 20b spirally wound around the outer wall. The resin tube 20a is formed of a soft thermoplastic resin such as polyethylene or polypropylene, for example, and an elastomer is blended at a predetermined ratio as necessary to enhance the elasticity of the resin tube 20a. The resin tube 20a may have a two-layer structure instead of a single layer as illustrated. The protrusion 20b is also made of the same resin as the resin tube 20a, and is harder than the resin tube 20a by changing the blending ratio of the elastomer. Such a main lining material 20 is described in Patent Document 1, for example.

  Since the main pipe lining material 20 can be elastically deformed by the resin pipe 20a and the protruding portion 20b, the main pipe lining material 20 is folded into, for example, a heart shape and, as shown in FIG. The cross-section is restored to a circular shape by being drawn in and compressed by self-repulsive force or by sending compressed air into the resin tube 20a. Since a gap is formed between the outer peripheral surface of the resin pipe 20a and the inner peripheral surface of the main pipe 30, when the grout material 21 is injected and solidified there, the main pipe 30 and the main pipe lining material 20 are integrated. A composite tube is constructed.

  When the main pipe 30 is lined with the main pipe lining material 20, the main pipe side opening 31a of the branch pipe 31 branched from the main pipe 30 is closed. Therefore, when the branch pipe opening 31a closed by the main pipe lining material 20 is cut from the main pipe side or the branch pipe side by a known method, the main pipe 30 and the branch pipe 31 are restored to the original shape as shown in FIG. The streets will communicate.

  FIG. 4 is a perspective view of a branch pipe lining material for lining the branch pipe 31, and FIGS. 5 to 7 are cross-sectional views illustrating the manufacturing method thereof.

  The branch pipe lining material 1 is bonded to one end of the tubular resin absorbent material 2 and a flexible tubular resin absorbent material 2 coated with an airtight plastic film 4 on the outer peripheral surface (which becomes the inner peripheral surface when inverted). Has 鍔 3. The tubular resin absorbent material 2 is a non-woven fabric, woven fabric, or mat using plastic fibers such as polyamide, polyester, or polypropylene; or a woven fabric or mat using glass fibers; or a non-woven fabric combining the plastic fibers and glass fibers. , Woven fabric or mat. The tubular resin absorbent material 2 is impregnated with an uncured liquid curable resin such as a thermosetting resin or a photocurable resin.

  Such a branch pipe lining material 1 is manufactured as follows.

  As shown in FIG. 5A, a highly airtight plastic film 4 is coated on the entire back surface of the strip-shaped resin absorbent material 2 having a predetermined width and a predetermined length by heat welding. As shown in FIG. 5B, the belt-shaped resin absorbent material 2 is rounded so that the plastic film 4 becomes an outer peripheral surface, and both end portions 2a and 2b are butted. The butted portion 2c is sewn and heat-sealed with a tape 2d made of polyethylene or polypropylene so that the tubular resin absorbent material 2 whose outer peripheral surface is covered with the plastic film 4 is manufactured.

  Rather than coating the strip-shaped resin absorbent material with the plastic film 4 and making it into a tubular shape, it is possible to form an uncoated strip-shaped resin absorbent material into a tubular shape and then coating the outer peripheral surface with the plastic film 4. .

  As will be described later, the tubular resin absorbent material 2 is inverted and inserted into the branch pipe 31 and expanded into a circular shape. The width of the strip-shaped resin absorbent material is determined such that the outer diameter of the tubular resin absorbent material 2 expanded in a circle is substantially equal to the inner diameter of the branch pipe 31, and the length thereof is lining the branch pipe 31 to be lined. It becomes the length according to the length of.

  The flange 3 is manufactured using a soft thermoplastic resin that can be heat-welded with a resin used for the resin pipe 20a of the main pipe lining material 20. For example, when the resin tube 20a is made using polyethylene, the heel 3 is also made using polyethylene, and when the resin tube 20a is made using polypropylene, the heel 3 is also made using polypropylene. . Accordingly, the flange 3 is made of a thermoplastic resin that can be thermally bonded to the thermoplastic resin of the resin tube 20a by heating and can be integrally bonded to the resin tube 20a.

  Further, as the resin used for the plastic film 4 coated on the tubular resin absorbent material 2, a soft thermoplastic resin that can be thermally welded to the thermoplastic resin of the ridge 3 is selected. For example, when the basket 3 is made of polyethylene, the plastic film 4 is also made using polyethylene. When the basket 3 is made of polypropylene, the plastic film 4 is also made of polypropylene.

  The flange 3 is composed of a flange portion 3a having an opening at the center and a cylindrical portion 3b integrated with the flange portion 3a protruding upward from the opening. The outer diameter of the cylindrical portion 3b is the same as that of the tubular resin absorbent material 2. It is almost equal to the inner diameter when it is inverted and inflated into a circle. The flange portion 3 a of the flange 3 has a curved surface that is curved in an arc shape with a curvature substantially equal to the inner surface of the main pipe 30.

  As shown in FIG. 6, one end of the tubular resin absorbent material 2 is inverted so that the plastic film 4 becomes the inner peripheral surface, and the inverted tubular resin absorbent material 2 has one end of the cylindrical portion 3 b of the flange 3. It is fitted to the cylindrical portion 3b of the flange 3 so as to be in close contact with the outer peripheral surface.

  Next, a ring-shaped heater (heating means) 5 made of, for example, nichrome wire is inserted into the cylindrical portion 3b from the end of the tubular resin absorbent material 2 on the side opposite to the flange 3, and the cylindrical portion 3b and the plastic It is attached to the close contact part of the film 4. When electric power is supplied from the power source 6 to the heater 5 through the lead wire 5a, the thermoplastic resin and the plastic film 4 in the cylindrical portion 3b are heated and thermally welded, and the flange 3 is integrally coupled with the tubular resin absorbent material 2. In order to increase the degree of coupling between the flange 3 and the tubular resin absorbent material 2, it is preferable to increase the height of the cylindrical portion 3 b and increase the contact area between the cylindrical portion 3 b and the plastic film 4.

  The heating temperature by the heater 5 is set to an appropriate temperature within a temperature range of about 105 ° to 150 ° C. according to the material of the thermoplastic resin of the cylindrical portion 3 b and the material of the plastic film 4.

  In this way, when the flange 3 and the tubular resin absorbent material 2 are joined together, the resin impregnated tube 7 is attached to the inverted end of the tubular resin absorbent material 2 as shown in FIG. An uncured liquid curable resin 8, for example, a thermosetting resin such as an unsaturated polyester resin, a vinyl ester resin, or an epoxy resin is injected. By inverting the resin impregnation tube 7 with compressed air or the like and inserting it into the tubular resin absorbent material 2, the curable resin 8 is sequentially impregnated into the tubular resin absorbent material 2. The tubular resin absorbent material 2 may be impregnated with a photocurable resin that is cured by irradiating ultraviolet rays instead of or together with the thermosetting resin. After impregnating the resin, the resin impregnating tube 7 is removed from the tubular resin absorbent material 2.

  In FIG. 7, what is indicated by a one-dot chain line is a sealed tube 10 for reversing and inserting the branch pipe lining material 1 into the branch pipe, also called an inliner or inflator (expansion bag). It can be attached to.

  FIG. 8 shows another embodiment of the bag. In this embodiment, the flange 11 is made of a soft thermoplastic resin that can be thermally welded to the resin tube 20a of the main pipe lining material 20 in the same manner as the flange 3. The flange 11 has an opening substantially equal to the inner diameter of the tubular resin absorbent material 2 when the center portion 11b of the flange portion 11a is inverted and expanded into a circular shape, and has an arc shape with a curvature equal to the inner surface of the main tube 30. It has a curved surface that curves. The plastic film 4 covering the tubular resin absorbent 2 is made of the same resin as the thermoplastic resin of the ridge 11.

  In FIG. 8, the tubular resin absorbent material 2 is similarly inverted at one end, and the inverted end is folded back to form a folded portion 2e. The tubular resin absorbent material 2 is attached to the flange 11 so that the plastic film 4 that is folded and becomes the inner peripheral surface is in close contact with the upper portion of the flange portion 11 a of the flange 11. From the end of the tubular resin absorbent 2 opposite to the flange 11, a ring-shaped heater (heating means) 12 made of nichrome wire is on the back surface of the flange 11a of the flange 11, and the flange 11a and the folded portion 2e of the flange 11e. The plastic film 4 is attached to the close contact portion.

  When power is supplied to the heater 12, the thermoplastic resin and the plastic film 4 in the flange portion 11 a are heated and thermally welded, and the flange 11 is integrally coupled with the tubular resin absorbent material 2. In order to increase the degree of coupling between the flange 11 and the tubular resin absorbent material 2, the length of the folded portion 2e of the tubular resin absorbent material 2 is increased, and the contact area between the plastic film 4 and the flange portion 11a of the folded portion 2e is increased. It is preferable.

  The heating temperature by the heater 12 is set to an appropriate temperature within a temperature range of about 105 ° to 150 ° C. according to the material of the thermoplastic resin of the flange portion 11a and the material of the plastic film 4 as in the case of the heater 5. Is done.

  Below, the process of lining the branch pipe 31 branched from the main pipe 30 lined with the main pipe lining material 20 using the above-described branch pipe lining material 1 as shown in FIG. 3 will be described.

  FIG. 9 shows a metal head collar 80 attached to a working robot carried into the main pipe, and the branch pipe lining material 1 is set on the head collar 80 as shown in FIG. 10B. .

  The head collar 80 has a curved portion 80a curved with substantially the same curvature as the inner peripheral surface of the main pipe 30 or the flanges 3 and 11 of the branch pipe lining material 1, and a cylindrical portion 80b is attached to the center of the curved portion 80a. It is done. An attachment plate 80c for attaching the head collar 80 to a work robot, which will be described later, is fixed to the bending portion 80a.

  As shown in FIG. 10A, the curved portion 80a of the head collar 80 is provided with a ring heater (heating means) having the same shape as the flange 3 of the branch pipe lining material 1 and an inner diameter substantially equal to the outer diameter of the cylindrical portion 80b. ) 81 is attached. The heater 81 is composed of a nichrome wire that generates heat when energized through a lead wire 81a, and is covered with a heat-resistant and elastic material, and is given elasticity in the vertical direction as seen in the figure. . In order to increase elasticity, a heat-resistant elastic body having the same shape as the heater 81 may be set on the curved portion 80a, and the heater 81 may be set thereon. In this case, conversely, a heat-resistant elastic body having the same shape as that of the heater 81 may be set on the heater 81 set in the bending portion 80a so as to increase the elasticity.

  As shown in FIG. 10 (b), the branch pipe lining material 1 is formed so that its ridge 3 is in close contact with the heater 81, and the non-inverted tubular resin absorbent 2 excluding the ridge 3 is disposed inside the cylindrical portion 80 b. The head collar 80 is set so as to pass and extend downward.

  As shown in FIGS. 7 and 11, the sealed tube 10 for reversing the branch pipe lining material 1 is reversed so that the non-reversed portion of the branch pipe lining material 1 can be included, and one end 10 a of the sealed tube 10 is a pressure back 43. The other end 10 b which is airtightly fixed to the inner surface of the connector and is inverted is attached to the connector 45 in an airtight manner. As shown in FIG. 11, the branch lining material 1 set in the head collar 80 is accommodated in the pressure bag 43 with its non-inverted portion inserted into the inverted interior of the sealed tube 10.

  The cylindrical portion 80 b of the head collar 80 is inserted into one end of the pressure bag 43 and is airtightly attached to the pressure bag 43, while the opening end of the pressure bag 43 opposite to the head collar 80 is airtightly closed by the cap 52. .

  A traction rope 40 and a hot water hose 41 that are airtightly attached to the cap 52 are connected to a connector 45 that closes the other end 10 b of the sealed tube 10. The hot water hose 41 passes through the cap 52, goes out of the pressure bag 43, and is led to the valve 53. Hot water (heat medium) is supplied to the hot water hose 41 by a hot water pump 54 from a hot water tank 55 heated by a heat source (not shown). The hot water in the pressure bag 43 is returned to the hot water tank 55 via the drain hose 56 and the valve 57.

  In the pressure bag 43, a sealed space that is closed by the sealed tube 10 is formed, and the sealed space is connected to a compressor 61 installed on the ground via an air hose 59 and a valve 60 attached to the cap 52. At the same time, it communicates with the outside air through the exhaust hose 62 and the valve 63.

  The working robot 42 is configured such that its head 44 moves back and forth in the vertical directions a and b in FIG. 11 and rotates (rolls) about the tube axis as indicated by an arrow c. A TV camera 46 for monitoring is installed on the robot 42. The head collar 80 is attached to the distal end portion of the head 44 of the working robot 42 via the attachment plate 80c. When the head 44 moves in the directions a, b, and c, the head collar 80 and the branch pipe lining material 1 set on the head collar 80 move in the same manner.

  Since the tow ropes 47 and 48 are attached to the front and rear of the work robot 42, the center of the rod 3 of the branch pipe lining material 1 is the opening of the branch pipe 31 by pulling the tow ropes 47 and 48 with a winch or the like. The work robot 42 and the pressure bag 43 are moved in the tube length direction so as to coincide with the center of 31a. In this state, by moving the head 44 in the vertical direction and rolling it, as shown in FIG. 11, the collar 3 of the branch pipe lining material 1 is replaced by the main pipe 30 lined with the main pipe lining material 20. It is pressed and adhered to the periphery of the branch pipe opening.

  FIG. 14 is an enlarged cross-sectional view of the periphery of the branch pipe opening when the collar 3 of the branch pipe lining material 1 is in close contact with the periphery of the branch pipe opening of the main pipe. The cross section along the direction orthogonal to the shown cross section is shown enlarged. 14 and 15, the size, thickness, and the like of the members shown in the cross section do not show actual sizes, but are partially exaggerated for easy understanding.

  In this state, when the compressor 61 is driven and compressed air (pressurized fluid) is supplied to the sealed space in the pressure bag 43 through the air hose 59, the sealed tube 10 is inverted and inserted into the branch pipe 31. The branch lining material 1 wrapped in the sealed tube 10 is also sequentially inserted upward in the branch pipe 31 while being inverted. At this time, the hot water hose 41 and the traction rope 40 connected to the sealed tube 10 via the connector 45 are also inserted into the branch pipe 31.

  As shown in FIG. 12, when the inverted insertion of the tubular resin absorbent material 2 into the branch pipe 31 is completed, the tubular resin absorbent material 2 is pressed against the inner peripheral surface of the branch pipe 31, and hot water is supplied to the hot water hose 41. To be filled from the tip 41a. The compressed air in the sealed space is discharged into the atmosphere through the exhaust hose 62, while the thermosetting resin impregnated in the tubular resin absorbent material 2 is heated by the hot water supplied from the hot water tank 55 and cured.

  While the branch pipe lining material 1 is inverted and inserted into the branch pipe 31, or when the curable resin impregnated in the tubular resin absorbent material after being inserted is cured, the lead pipe 81a is used. The heater 81 is energized by the power source 82. The heater 81 heats the thermoplastic resin of the collar 3 of the branch pipe lining material 1 and the thermoplastic resin of the resin pipe 20a of the main pipe lining material 20 to a temperature of about 105 ° to 150 ° C., for example. This heating temperature is set to an appropriate temperature within a range of about 105 ° to 150 ° C. according to the material of each thermoplastic resin. Since the thermoplastic resin of the collar 3 and the thermoplastic resin of the resin tube 20a are the same resin, for example, polyethylene or polypropylene resin, the thermoplastic resin of the branch pipe lining material 1 and the main pipe lining material are easily and surely welded. The 20 resin pipes 20a are integrally coupled, and underground water can be prevented from flowing into the main pipe from the junction between the main pipe and the branch pipe.

  Note that, as shown in FIG. 11, the ridge 3 of the branch pipe lining material 1 is in close contact with the peripheral edge of the branch pipe opening, as shown in FIG. Alternatively, it may be performed before the tubular resin absorbent material 2 is inverted and inserted into the branch pipe 31, that is, before the compressor 61 is driven and the compressed air is supplied into the pressure bag.

  After the resin impregnated in the tubular resin absorbent material 2 is cured, hot water is extracted from the sealed space through the drainage hose 56 and returned to the hot water tank 55. After returning the warm water to the warm water tank 55, pulling the pulling rope 40 and the warm water hose 41 to the left in FIG. 13 while applying a certain amount of pressure to the sealed space, the sealed tube 10 is reversed and the branch pipe lining material 1 is removed. Removed.

  Next, the head 44 of the work robot 42 is moved downward in the direction of the arrow b, and the head collar 80 and the heater 81 are separated from the rod 3 of the branch pipe lining material 1, and then the work robot 42, the pressure bag 43, etc. It is removed from the main pipe 30. In this way, the inner peripheral surface of the branch pipe 31 is lined with the tubular resin absorbent material 2.

  The resin impregnated in the tubular resin absorbent 2 is cured by providing a plurality of injection holes in the hot water hose 41 and spraying the hot water or water vapor in a shower or mist form on the tubular resin absorbent 2 from the injection holes. You may make it make it.

  In the embodiment described above, the main pipe 30 is lined by using the main pipe lining material 20 including the resin pipe 20a and the protruding portion 20b wound around the outer periphery of the resin pipe 20a. However, as shown in FIG. 16, lining is performed using a main pipe lining material 90 formed by impregnating a curable resin into a tubular resin absorbent material 90a whose outer peripheral surface is coated with an airtight plastic film 90b. Also good.

  The tubular resin absorbent material 90a of the main pipe lining material 90 is made of the same material as the tubular resin absorbent material 2 of the branch pipe lining material 1, and the tubular resin absorbent material 90a is made of a thermosetting resin or a photocurable resin. An uncured liquid curable resin is impregnated. The plastic film 90b that covers the tubular resin absorbent material 90a is made of a soft thermoplastic resin that can be thermally welded to the thermoplastic resin of the flange 3 of the branch pipe lining material 1. For example, when the bag 3 is made of polyethylene, the plastic film 90b is made of polyethylene. Further, when the basket 3 is made of polypropylene, the plastic film 90b is also made of polypropylene.

  The main pipe lining material 90 is inverted and inserted into the main pipe 30 by a known method, and as shown in FIG. 17, the tubular resin absorbent material 90a is heated while being pressed against the inner peripheral surface of the main pipe 30, The resin impregnated in the tubular resin absorbent material 90 a is cured, and the main pipe 30 is lined with the main pipe lining material 90. The opening 31 a of the branch pipe 31 closed by the main pipe lining material 90 is cut away, and the main pipe 30 comes into communication with the branch pipe 31.

  Thereafter, the branch pipe 31 is lined using the branch pipe lining material 1 in the same manner as shown in FIGS.

  18 and 19, as in FIG. 14, the state when the ridge 3 of the branch pipe lining material 1 and the main pipe lining material 90 at the periphery of the branch pipe opening of the main pipe are in close contact with each other is illustrated in an enlarged manner. ing. In such a state, when the curable resin impregnated in the tubular resin absorbent material 2 is cured before, during, or after the branch pipe lining material 1 is inserted into the branch pipe 31, Energize. The heater 81 heats the thermoplastic resin of the collar 3 of the branch pipe lining material 1 and the thermoplastic resin of the plastic film 90 b of the main pipe lining material 90. Since the thermoplastic resin of the collar 3 and the thermoplastic resin of the plastic film 90b are the same resin, for example, polyethylene or polypropylene resin, the thermoplastic resin of the branch pipe lining material 1 and the main pipe lining material are easily and surely welded. 90 is integrally coupled, and can prevent leakage of water from the junction between the main pipe and the branch pipe or earth and sand from the ground into the main pipe, as in the case of the main pipe lining material 20. .

  In the embodiment described above, the branch pipe is lined using the branch pipe lining material 1 shown in FIG. 6, but the branch pipe can be lined using the branch pipe lining material 1 of the embodiment shown in FIG. Of course.

DESCRIPTION OF SYMBOLS 1 Branch pipe lining material 2 Tubular resin absorber 3 鍔 4 Plastic film 5 Heater 7 Resin impregnation tube 8 Curable resin 10 Sealed tube 11 １２ 12 Heater 20 Main pipe lining material 20a Resin pipe 20b Projection part 21 Grout material 30 Pipe 31 Branch pipe 40 Tow rope 41 Hot water hose 42 Robot for work 43 Pressure bag 44 Head 45 Connector 46 TV camera 47, 48 Tow rope 52 Cap 55 Hot water tank 56 Drain hose 80 Head collar 81 Heater 90 Main pipe lining material 90a Tubular Resin absorber 90b Plastic film

Claims (10)

A ridge is formed at one end of a flexible tubular resin absorbent material impregnated with a liquid curable resin, and is inserted into the branch pipe in close contact with the periphery of the branch pipe opening of the main pipe that intersects the branch pipe. A branch pipe lining material for lining a branch pipe,
The ridge is formed from a thermoplastic resin;
The peripheral surface of the tubular resin absorbent material is coated with a plastic film that can be heat-welded with a ridge,
A branch pipe lining material, wherein the ridge is thermally welded to a plastic film by thermal welding, and the ridge is integrally bonded to a tubular resin absorbent material.   The branch pipe lining material according to claim 1, wherein the thermoplastic resin of the ridge includes polyethylene, and the plastic film is made of polyethylene.   The branch pipe lining material according to claim 1, wherein the thermoplastic resin of the ridge includes polypropylene, and the plastic film is made of polypropylene.   The flange includes a flange portion having an opening at the center and a cylindrical portion projecting from the opening. The cylindrical portion of the flange is thermally welded to a plastic film at one end of the tubular resin absorbent material so that the flange is absorbed by the tubular resin. The branch pipe lining material according to any one of claims 1 to 3, wherein the branch lining material is bonded to one end of the material.   The flange includes a flange portion having an open center, and the flange portion of the flange is thermally welded to a plastic film at one end of the tubular resin absorbent material so that the flange is coupled to one end of the tubular resin absorbent material. Item 4. The branch pipe lining material according to any one of Items 1 to 3. A crease is formed at one end of a flexible tubular resin absorbent material impregnated with a liquid curable resin, and the crease is brought into close contact with the periphery of the branch pipe opening of the main pipe intersecting with the branch pipe and inserted into the branch pipe. A method of manufacturing a branch pipe lining material,
A tubular resin absorbent material whose outer peripheral surface is coated with a plastic film is produced,
A bag made of a thermoplastic resin capable of being thermally welded to the plastic film is brought into close contact with the plastic film at one end of the tubular resin absorbent material,
The thermoplastic resin of the coffin and the plastic film of the tubular resin absorbent material which are adhered are thermally welded to bond the coffin to one end of the tubular resin absorbent material.
A method of manufacturing a branch pipe lining material, comprising manufacturing a branch pipe lining material by impregnating a tubular resin absorbent material combined with a bag with a liquid curable resin.   The method for manufacturing a branch pipe lining material according to claim 6, wherein the thermoplastic resin of the ridge includes polyethylene, and the plastic film is made of polyethylene.   The method for manufacturing a branch pipe lining material according to claim 6, wherein the thermoplastic resin of the ridge includes polypropylene, and the plastic film is made of polypropylene.   The flange includes a flange portion having an opening at the center and a cylindrical portion protruding from the opening. One end of the tubular resin absorbent material is inverted, and the cylindrical portion of the flange is inverted to become an inner peripheral surface. The method for manufacturing a branch pipe lining material according to any one of claims 6 to 8, wherein the ridge is bonded to one end of the tubular resin absorbent material by heat welding with the plastic film.   The flange is formed of a flange portion having an open center portion, and one end of the tubular resin absorbent material is inverted and folded, and the flange portion of the flange is inverted and folded to be thermally welded to a plastic film having an inner peripheral surface. The method for manufacturing a branch pipe lining material according to any one of claims 6 to 8, wherein the flange is bonded to one end of the tubular resin absorbent material.

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