JP5587474B2 - Branch pipe lining method - Google Patents

Description

  The present invention relates to a branch pipe lining method for lining a branch pipe (attachment pipe) using a branch pipe lining material in which a ridge is formed at one end of a tubular resin absorbent material impregnated with a curable resin.

  When pipes such as sewage pipes buried in the ground are aged, pipe lining construction methods are known in which pipes are repaired by lining the inner peripheral surface without digging the pipes out of the ground. ing.

  In the above-mentioned pipe lining method, a pipe lining material made by impregnating a flexible tubular resin absorbent material whose outer peripheral surface is coated with a highly airtight film is impregnated with a curable resin is inserted into the pipe line while being reversed by fluid pressure. Is done. The pipe lining material is heated while being pressed against the inner peripheral surface of the pipe line by fluid pressure, and the curable resin impregnated therein is cured to line the inner peripheral face of the pipe line.

  Such a construction method can be applied to a branch pipe branched from the main pipe, and is described in Patent Documents 1 and 2, for example. When lining a branch pipe, a ridge formed at one end of the branch pipe lining material built in the pressure bag is set on the head collar of the work robot introduced into the main pipe, and the main robot is driven by driving the work robot. The tube is in close contact with the peripheral edge of the branch tube opening. If compressed air is supplied into the pressure bag, the branch pipe lining material is inserted into the branch pipe while receiving the pressure of the compressed air and inverting. When the reverse insertion is completed over the entire length of the branch pipe, the thermosetting resin impregnated therein is cured by heating while the branch pipe lining material is pressed against the inner peripheral surface of the branch pipe. The inner peripheral surface is lined by the hardened branch pipe lining material.

JP-A-4-355115 JP 2008-168468 A

  However, the wrinkles of the branch pipe lining material are cured when formed of a thermosetting resin, and are hard at room temperature when formed of a thermoplastic resin. Yes.

  Therefore, even when trying to bring the branch pipe lining material into close contact with the peripheral edge of the branch pipe opening by using a work robot, there is a manufacturing error in the pipe, If there are irregularities at the periphery of the branch tube opening, a good adhesion state cannot be obtained.

  If the lining is finished without the contact state being good, a gap is generated between the branch pipe lining material and the peripheral edge of the main pipe opening, and groundwater and underground soil and sand flow from the gap into the main pipe. There is a problem that the drainage performance of the main pipe is deteriorated.

  An object of the present invention is to provide a branch pipe lining method capable of lining a branch pipe by satisfactorily bringing a ridge of the branch pipe lining material into close contact with the peripheral edge of the branch pipe opening of the main pipe.

The present invention
A branch pipe lining method for lining a branch pipe intersecting with a main pipe using a branch pipe lining material in which a ridge is formed at one end of a tubular resin absorbent material impregnated with a curable resin,
Arrange the ridge of branch pipe lining material on the expandable heel presser,
Supplying a heat medium to the scissors pressing tool to expand the scissors pressing tool to closely contact the scissors of the branch pipe lining material to the periphery of the branch pipe opening of the main pipe,
In this state, the branch pipe lining material is inserted into the branch pipe and the curable resin impregnated in the tubular resin absorbent material is heated and cured.
An adhesive made of a thermosetting resin is applied on the ridges of the branch pipe lining material, and the adhesive is heated by supplying the heating medium to the heel pressing tool, and the ridges of the branch pipe lining material are removed. It is fixed to the periphery of the branch pipe opening of the main pipe.

  According to the present invention, the ridge of the branch pipe lining material adheres well to the periphery of the branch pipe opening of the main pipe, so that no gap is generated therebetween. Accordingly, since groundwater and underground earth and sand do not flow into the main pipe from the gap between the branch pipe lining material and the branch pipe opening peripheral edge of the main pipe, the drainage performance of the main pipe can be improved.

It is sectional drawing of the branch pipe lining material used for the construction method of this invention. It is explanatory drawing explaining the process which produces the built-in bag of a scissors pressing tool. (A) is a top view of the reinforcement cover which coat | covers a built-in bag, (b) is a top view of a heel pressing tool, (c) is sectional drawing which follows the AA line of (b). It is a perspective view of the head collar attached to a working robot. (A) is a perspective view of the head collar when a heel pressing tool is placed on the head collar, and (b) is a perspective view of the head collar when a protective cover is attached to the heel pressing tool. (A) is a perspective view of a head collar when a branch pipe lining material is set on the head collar, and (b) is a perspective view when an adhesive is applied to a ridge of the branch pipe lining material. (A) is a longitudinal cross-sectional view of the head collar before inflating the heel pressing tool, and (b) is a longitudinal sectional view of the head collar when the heel pressing tool is expanded. It is explanatory drawing which showed the method of lining a branch pipe with a branch pipe lining material. It is explanatory drawing which showed the method of lining a branch pipe with a branch pipe lining material. It is explanatory drawing which showed the heater arrange | positioned on the scissors pressing tool. It is explanatory drawing explaining the structure of the scissors pressing tool comprised by wrapping a tube. (A) is a perspective view of the head collar when the scissors pressing tool is placed on the head collar to which the covering sheet is attached, and (b) is a perspective view of the head collar when the protective cover is attached to the scissors pressing tool. . (A) is a perspective view of a head collar when a branch pipe lining material is set on a head collar to which a covering sheet is attached, and (b) is a perspective view when an adhesive is applied to a ridge of the branch pipe lining material. . It is explanatory drawing which showed the method of lining a branch pipe using the head collar to which the coating sheet was attached.

    Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

  FIG. 1 shows a branch pipe lining material 1 for lining a branch pipe (attachment pipe). The branch pipe lining material 1 has a tubular resin absorbent material 2 made of a non-woven fabric, and one end of the branch pipe lining material 1 is folded outward to form a flange-shaped ridge 3. The portion of the tubular resin absorbent material 2 except the ridge 3 is impregnated with an uncured liquid thermosetting resin, and the outer peripheral surface of the portion (which becomes the inner peripheral surface when inverted) is made of polyethylene, polypropylene, A highly airtight plastic film 4 such as nylon or vinyl chloride is coated.

  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 thermosetting resin impregnated in the tubular resin absorbent 2 is, for example, an unsaturated polyester resin, a vinyl ester resin, or an epoxy resin.

  The flange 3 formed at one end of the tubular resin absorbent material 2 constitutes a curved surface that is curved in an arc shape with a curvature equal to the main pipe 30 (see FIG. 8) described later, and the outer diameter thereof is a branch pipe 31 (described later). 8 is set larger than the inner diameter, and the curable resin impregnated therein is cured so that the collar 3 maintains its shape.

  In addition, the eaves 3 can also be comprised from thermoplastic resins, such as a vinyl chloride, instead of a thermosetting resin. In this case, the collar 3 and the tubular resin absorbent material 2 are bonded with an adhesive or the like.

  Further, a peeling tube 5 having a predetermined length is passed outside the tubular resin absorbent material 2, and one end of the peeling tube 5 is detachably bonded to the outer periphery of the tubular resin absorbent material 2 in the vicinity of the flange 3. The end is open and is airtightly attached to a pressure bag which will be described later. The material of the peel tube 5 is the same as that of the plastic film 4.

  A tubular peeling end 6 is detachably attached to the other end of the tubular resin absorbent material 2. The peeling end 6 is made of the same material as that of the plastic film 4, and one end is closed by a connector 7.

  In the present embodiment, a scissor pressing tool 70 in which a built-in bag 73 is covered with a reinforcing cover 74 is used to bring the scissors 3 of the branch pipe lining material 1 into close contact with the peripheral edge of the main pipe branch opening.

  As shown in FIG. 2, the built-in bag 73 includes a sheet 71 having a circular opening 71a at the center and protrusions 71b and 71c at the side, and a circular opening 72a at the center and a protrusion at the side. The sheets 72 having 72b and 72c are overlapped so as to form a bag shape, and as shown in the lower part of FIG. 2, the peripheral portion 73d indicated by the dotted line and the outer peripheral portion 73e of the openings 71a and 72a are bonded in an airtight manner. It is produced by this. Each of the sheets 71 and 72 is made of a highly airtight plastic such as polyethylene, polypropylene, nylon, or vinyl chloride.

  The built-in bag 73 configured in this manner has an opening 73a corresponding to the openings 71a and 72a of the sheets 71 and 72, and the opening 73a has a size that allows a cylindrical portion of a head collar to be described later to be inserted. ing. In addition, since the tips of the projecting portions 71b and 72b of the sheets 71 and 72 are not bonded, it is used as an inlet 73b for taking in a heat medium to be described later, and the projecting portions 71c and 72c are also not bonded to the tip portions. It is used as a discharge port 73c for discharging the heat medium in the internal bag 73. A heat medium supply hose 75 and a heat medium drain hose 76 are airtightly attached to the heat medium inlet 73b and the outlet 73c of the internal bag 73, respectively.

  As shown in FIG. 3A, the internal bag 73 is covered with a reinforcing cover 74 made of a material such as cashmere, silk, nylon, or rayon, or a material that is difficult to extend such as silicon, polyethylene, or polyurethane. The reinforcing cover 74 has openings 74a corresponding to the openings 71a and 72a of the sheets 71 and 72, and protrusions 74b and 74c corresponding to the protrusions 71b, 71c, 72b and 72c, and is similar to the sheets 71 and 72. Although it is a shape, the overall size is slightly smaller. A reinforcing cover 74 ′ (FIG. 3C) similar to the reinforcing cover 74 is provided, and the built-in bag 73 is entirely covered so as to be sandwiched between the two reinforcing covers 74, 74 ′. After the covering, the periphery 74d of the reinforcing cover 74, the outer peripheral portion 74e of the opening 74a, and the corresponding portion of the reinforcing cover 74 'are sewn or bonded to produce the bag-like heel pressing portion 70.

  The reinforcing covers 74 and 74 'are slightly smaller in shape than the sheets 71 and 72 of the internal bag 73. Therefore, when the internal bag 73 is covered, as shown in FIG. 71 and 72 are built in a wrinkled state. FIG. 3C is a cross-sectional view taken along the line AA in FIG. 3B, but is not an accurate cross-sectional view and schematically shows that the built-in bag 73 is built in a wrinkled state. It is shown.

  As shown in FIG. 3B, the scissors pressing tool 70 configured as described above includes an opening 70 a into which a cylindrical portion of the head collar can be inserted, a heat medium supply hose 75, and a heat medium drain hose 76. When the fluid (liquid, gas) is supplied from the heat medium supply hose 75, the built-in bag 73 expands into a flat bag shape as a whole and generates a pressing force. At this time, the built-in bag 73 is pressed against the reinforcing cover and does not completely inflate, so that the internal bag 73 is prevented from bursting or being overloaded.

  In addition, as shown in the figure, the outer shape of the heel pressing tool 70 may not be a rectangle, but may be a circle or a triangle.

  FIG. 4 shows a metallic head collar (pressing jig) 80 that is attached to a working robot and a pressure bag, which will be described later, and is used to set a branch pipe lining material on the branch pipe. The head collar 80 has a curved portion 80a having a curvature corresponding to the curvature of the inner peripheral surface of the main pipe, and a hollow cylindrical portion (collar) 80b extends downward through the curved portion 80a. The outer diameter of the cylindrical portion 80 b of the head collar 80 is slightly smaller than the diameter of the opening 70 a so that the cylindrical portion 80 b of the head collar 80 can be passed through the opening 70 a of the heel pressing tool 70.

  The cylindrical portion 80b of the head collar 80 is passed through the opening 70a of the heel pressing tool 70, and the heel pressing portion 70 is placed on the head collar 80 as shown in FIG. The heel pressing tool 70 does not need to be fixed in particular, but if the heel pressing tool 70 is likely to move, it is detachably mounted on the head collar 80 using an adhesive tape.

  As will be described later, since an adhesive is applied onto the ridges of the branch pipe lining material, in order to prevent the adhesive from flowing down onto the heel pressing tool 70 and the head collar 80, as shown in FIG. As shown in FIG. 5, the heel pressing tool 80 and the head collar 80 are covered with a protective film 81 larger than the head collar 80. Since the protective film 81 is provided with an opening having substantially the same diameter as the opening 70a of the heel pressing tool 70 at the center, the protective film 81 is crushed and pressed through the cylindrical portion 80b of the head collar 80. It is placed on the tool 70 and the head collar 80. Then, the protective film 81 is fixed to the curved portion of the head collar 80 with an adhesive or the like so that the protective film 81 does not move.

  Subsequently, the branch pipe lining material 1 shown in FIG. 1 is inserted into the cylindrical portion 80b of the head collar 80 from the portion of the tubular resin absorbent material 2 opposite to the flange 3 (the one to which the connecting tool 7 is attached). As shown in FIG. 6A, the ridge 3 is placed on the protective film 81 so as to cover the ridge 3 on the cylindrical portion 80b. In order to allow the collar 3 of the branch pipe lining material 1 to be covered with the cylindrical portion 80 b of the head collar 80, the outer diameter of the cylindrical portion 80 b is slightly smaller than the inner diameter of the collar 3.

  Thus, when the branch pipe lining material 1 is placed on the head collar 80 via the protective film 81 and the heel pressing tool 70, the surface of the heel 3 is made of an unsaturated polyester resin, vinyl ester resin, epoxy resin or the like. Adhesive 82 is applied to the entire surface (FIG. 6B).

  As shown in FIG. 8, the branch lining material 1 attached to the head collar 80 is accommodated in the pressure bag 43, and the head collar 80 is attached to one end of the pressure bag 43 in an airtight manner.

  The working robot 42 is configured such that its head 44 moves back and forth in the vertical directions a and b in FIG. 8 and rotates (rolls) about the tube axis as indicated by an arrow c. The head collar 80 is attached. Further, a TV camera 46 for monitoring is installed on the upper part of the working robot 42. Tow ropes 47 and 48 are attached to the front and rear of the work robot 42, one tow rope 47 is connected to the pressure bag 43, and the other tow rope 48 extends to the ground. By pulling the tow rope 48, the pressure bag 43 is conveyed to the branch pipe 31 intersecting with the main pipe 30 via the work robot 42 and the tow rope 47.

  The open end of the pressure bag 43 is closed by a cap 52, and the other end of the peeling tube 5 attached to the tubular resin absorbent material 2 of the branch pipe lining material 1 is airtightly attached to the inside of the pressure bag 43.

  The traction rope 40 attached to the cap 52 and the hot water hose 41 are connected to the connector 7 attached to the peeling end 6 of the branch pipe lining material 1. 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.

  Hot water is supplied from the hot water tank 55 through the hot water pump 54 and the valve 66 to the heat medium supply hose 75 attached to the scissors pressing tool 70. Further, the warm water in the eaves pressing tool 70 is returned to the warm water tank 55 through the heat medium drain hose 76 and the valve 65.

  In the pressure bag 43, a sealed space is formed which is closed by the branch pipe lining material 1 and the peeling tube 5, and the sealed space is installed on the ground via an air hose 59 and a valve 60 attached to the cap 52. It is connected to the compressor 61 and communicates with the outside air through the exhaust hose 62 and the valve 63.

  A method of lining the branch pipe 31 using the branch pipe lining material 1 in the configuration as described above will be described.

  By pulling the pulling rope 48, the pressure bag 43 is moved until the center of the cylindrical portion 80b of the head collar 80 substantially coincides with the axis of the branch pipe 31 (FIG. 8).

  The head 44 of the working robot 42 is moved upward in the direction of the arrow a, and the scissors 3 of the branch pipe lining material 1 are pressed against the peripheral edge of the branch pipe opening of the main pipe 30 via the scissor pressing tool 70. If the manufacturing error of the ridge 3 or the irregularities in the peripheral edge of the branch pipe opening, the adhesion is deteriorated. Therefore, in the present invention, the heel pressing tool 70 is expanded so as to press the heel 3 against the peripheral edge of the branch pipe opening.

  When hot water from the hot water tank 55 is supplied to the heat medium supply hose 75 of the firewood pressing tool 70, the hot water is supplied to the built-in bag 73 of the firewood pressure tool 70, and the built-in bag 73, and hence the firewood pressure tool 80, is shown in FIG. ) Inflated into a flat bag shape as shown in FIG. 7B. The hot water that cannot be accommodated is returned to the hot water tank 55 via the heat medium drain hose 76. By circulating the hot water in this way, an elastic pressing force is generated in the heel pressing tool 70, and the heel 3 can be brought into close contact with the branch pipe opening peripheral edge 30 a of the main pipe 30. 7 (a) and 7 (b), the scissors pressing tool 70 is illustrated in a stylized manner to explain the expanded state, not an accurate sectional view.

  In addition, the pressing force by the scissors pressing tool 70 can be adjusted by adjusting the supply amount of hot water supplied to the scissors pressing tool 70 via the valve 66. Similarly, the pressing force of the scissors pressing tool 70 can also be adjusted by adjusting the discharge amount of the warm water returned from the scissors pressing tool 70 to the warm water tank 55 via the valve 65. Moreover, the pressing force of the scissors pressing tool 70 can also be adjusted by adjusting both the supply amount and discharge amount of warm water.

  Since hot water of about 60 ° to 90 ° C. is supplied to the scissors pressing tool 70, the scissors 3 are gradually heated, the adhesive 82 applied on the scissors 3 is cured, and the scissors 3 are connected to the main pipe 30. It is fixed to the branch pipe opening peripheral edge 30a. Even when the ridge 3 is made of a thermosetting resin and is already cured, the adhesive 82 on the ridge 3 is heated well by heat conduction. Further, when the collar 3 is made of a thermoplastic resin, the collar 3 becomes flexible by heating and the adhesion to the peripheral edge of the branch pipe opening is further improved, so that the collar 3 is securely adhered to the main pipe 30. It is possible to fix in the state of being made.

  When hot water is supplied to the heel pressing tool in this manner and the heel is in close contact with the periphery of the branch pipe opening, when the compressor 61 is driven and compressed air is supplied to the sealed space in the pressure bag 43 via the air hose 59. The branch pipe lining material 1 is sequentially inserted upward in the branch pipe 31 while being inverted by receiving the pressure of the compressed air.

  As shown in FIG. 9, when the inverted insertion of the branch pipe lining material 1 into the branch pipe 31 is completed, the branch pipe lining material 1 is pressed against the inner peripheral surface of the branch pipe 31, and hot water is supplied to the hot water hose 41. Supply from the tip of the to fill the enclosed space. The compressed air in the sealed space is released into the atmosphere through the exhaust hose 62, while the thermosetting resin impregnated in the tubular resin absorbent material 2 of the branch pipe lining material 1 is heated with hot water and cured.

  In the example described above, the scissors pressing tool is expanded by supplying warm water to the scissors pressing tool so that the scissors of the branch pipe lining material are brought into close contact with the periphery of the branch pipe opening of the main pipe. Is inserted into the branch pipe, and the curable resin impregnated in the tubular resin absorbent is heated and cured. However, instead of expanding the scissors pressing tool before inserting the branch pipe lining material into the branch pipe, the tubular resin absorbent material is inserted when the branch pipe lining material is inserted into the branch pipe, or during or after the insertion. When curing the curable resin impregnated in or after the start of curing, the coffin pressing tool is inflated by supplying warm water to the coffin pressing tool, and the eaves of the branch pipe lining material are spread around the periphery of the branch pipe opening of the main pipe You may make it adhere to.

  When the resin impregnated in the tubular resin absorbent material 2 is cured, warm water is extracted from the sealed space through the drainage hose 56 and returned to the warm water tank 55. The hot water in the scissors pressing tool 70 is also returned to the hot water tank via the heat medium drain hose 76.

  When the branch pipe lining material 1 is hardened, the head 44 of the work robot 42 is moved downward in the direction of the arrow b in the drawing to pull the scissors pressing tool 70 away from the scissors 3 of the branch pipe lining material 1, and then the tow rope 40 is shown in FIG. To the left. Then, the peeling tube 5, the peeling end 6, the hot water hose 41 and the like are drawn in the same direction and removed from the branch pipe lining material 1.

  The working robot 42, the pressure bag 43, and the like are removed from the main pipe 30, and the inner peripheral surface of the branch pipe 31 is lined with the tubular resin absorbent material 2.

  In addition, the heating medium used for expanding the scissors pressing tool 70 and heating the adhesive 82 on the scissors 3 can be hot air or a heated liquid instead of the hot water. When hot air or a heated liquid is used as the heat medium in this way, a heat source for making hot air or a heat source for heating the liquid and a circulation system for circulating the hot air and the heated liquid are prepared.

  In the above-described embodiment, the medium for heating the adhesive 82 is the same as the fluid for expanding the scissors pressing tool 70. Instead, as shown in FIG. A heater 90 can be used. The heater 90 is composed of a meandering heating wire 90a that generates heat when a voltage is applied, such as a nichrome wire, and is entirely covered with a cover 91 having waterproofness and insulation properties. The cover 91 is substantially the same size as the heel pressing tool 70, and an opening 91a having the same size as the opening 70a of the heel pressing tool 70 is formed at the center thereof. The heater can be energized from the ground.

  The heater 90 is disposed on the scissors pressing tool 70 protected by the protective film 81 by passing the cylindrical portion 80b of the head collar 80 through the opening 91a, and the scissors 3 of the branch pipe lining material 1 are disposed thereon. . In this case, since the fluid circulation system is not necessary for the scissors pressing tool 70, only one hose is connected and compressed air is supplied from the compressor 61.

  When the heater 90 is used, the heater 90 in FIG. 7 is disposed between the protective film 81 and the scissors 3 of the branch pipe lining material 1, so that the scissors pressing tool 70 is expanded with compressed air, When energization is performed, the trough 3 is pressed against the peripheral edge 30a of the branch pipe opening of the main pipe 30 as in the case of using warm water. And since the adhesive agent 82 on the collar 3 is heated and hardened by the heater 90, the collar 3 can be fixed in a state of being in close contact with the main pipe 30 as in the case of using warm water.

  FIG. 11 shows an embodiment in which an inflatable tube 100 is wound around the cylindrical portion 80b of the head collar 80 a plurality of times in place of the bag-like heel pressing tool as described above to constitute the heel pressing tool. The tube 100 wound around the cylindrical portion 80b is bundled with an elastic tape 101 so that the tube 100 cannot be unwound. A hose (not shown) is airtightly attached to the attachment end 100a of the tube 100 to the cylindrical portion 80b and the other end 100b.

  When hot water is supplied from the hot water tank 55 via one hose, the tube 100 expands into a circle or an ellipse. The excess hot water in the tube 100 is returned to the hot water tank 55 via the other hose. By circulating the hot water in this way, an elastic pressing force is generated in the tube 100. When the scissors 3 of the branch pipe lining material 1 are set on the tube 100, the scissors 3 are pressed well against the peripheral edge of the branch pipe opening of the main pipe like the scissors pressing tool 70, and the adhesive on the scissors 3 is heated with hot water. Because of this, it is possible to securely fix the flange 3 to the main pipe.

  Further, the pressing force by the tube 100 is adjusted by adjusting the supply amount of the hot water supplied to the tube 100 through the valve 66, or the hot water returned from the tube 100 to the hot water tank 55, as in the case of the heel pressing tool 70. The amount of discharge can be adjusted by adjusting the discharge amount via the valve 65 or by adjusting both the supply amount and discharge amount of hot water.

  It is the same as that of the scissors pressing tool 70 that a heated liquid or hot air can be used as a heating medium instead of hot water.

  Alternatively, the head collar 80 may be set on the working robot first, and then the heel pressing tool 70, the protective film 81, and the branch pipe lining material 1 may be placed on the head collar 80. In addition, first, after placing the scissors pressing tool 70 and the protective film 81 on the head collar 80 and setting the head collar 80 on the working robot, the branch pipe lining material 1 is set on the head collar 80. Also good.

  In the above-described embodiment, the head 44 of the work robot 42 lifts the head collar 80 upward from one side (right side in FIG. 8) and presses the collar 3 against the main pipe 30. There is a problem that the posture becomes unstable.

  Therefore, as shown in FIG. 12A, the lower portion of the head collar 80 is covered with the covering sheet 120, and the pressure bag 43 that is inflated with compressed air hits the covering sheet 120 to the opposite side of the head collar 80 ( The left side in FIG. 8 is supported by the pressure bag 43.

  The covering sheet 120 is a flexible covering material made of cloth or plastic. The covering sheet 120 is stretched smoothly under the curved portion 80a of the head collar 80, and one end 120a and the other end 120b (FIG. 13A) are folded back. It is fixed to the heel pressing tool 70 by bonding or sewing. An opening 120 c through which the pipe lining material 1 can pass is formed at a position corresponding to the cylindrical portion 80 b of the head collar 80 in the center portion of the covering sheet 120. The cover sheet 120 is also formed with a hole (not shown) through which the tip of the head 44 of the work robot 42 can pass.

  After the head collar 80 is covered with the covering sheet 120, the head collar 80 is covered with a protective film 81 as shown in FIG. Thereafter, as shown in FIGS. 6A and 6B, the tube lining material 1 is set on the head collar 80, and the adhesive 82 is applied on the ridge 3.

  In the case of lining the branch pipe using the head collar 80 covered with the covering sheet 120 as described above, the same process as described with reference to FIGS. 8 and 9 is performed. When the head collar 80 is covered with the covering sheet 120, as shown in FIG. 14, a part of the pressure bag 43 inflated with compressed air for reversing the branch pipe lining material hits the covering sheet 120, and the head collar 80 The side opposite to the head 44 (left side in FIG. 14) is supported by the pressure bag 43. This state is also shown in FIG. 13B by the pressure bag 43 indicated by phantom lines.

  Thus, the head collar 80 is supported on both sides by the pressure bag 43 and the head 44 of the work robot 42, and even if the collar 3 is pressed against the main pipe 30 through the head collar 80, A force that destabilizes the posture of the robot 42 is less likely to act on the work robot 42, and the lining work of the branch pipe can be smoothly proceeded.

  The covering sheet 120 is provided across the cylindrical portion 80b of the head collar 80 across the head 44 side of the working robot 42 and the opposite side thereof, but it is not necessary to provide it on the head 44 side. Can be omitted.

DESCRIPTION OF SYMBOLS 1 Branch pipe lining material 2 Tubular resin absorber 3 鍔 5 Peeling tube 6 Peeling end 30 Main pipe 31 Branch pipe 42 Working robot 43 Pressure bag 70 鍔 Pressing tool 73 Built-in bag 74, 74 'Reinforcement cover 80 Head collar 81 Film 82 Adhesive 90 Heater 100 Tube
120 Cover sheet

Claims (6)

A branch pipe lining method for lining a branch pipe intersecting with a main pipe using a branch pipe lining material in which a ridge is formed at one end of a tubular resin absorbent material impregnated with a curable resin,
Arrange the ridge of branch pipe lining material on the expandable heel presser,
Supplying a heat medium to the scissors pressing tool to expand the scissors pressing tool to closely contact the scissors of the branch pipe lining material to the periphery of the branch pipe opening of the main pipe,
In this state, the branch pipe lining material is inserted into the branch pipe and the curable resin impregnated in the tubular resin absorbent material is heated and cured.
An adhesive made of a thermosetting resin is applied on the ridges of the branch pipe lining material, and the adhesive is heated by supplying the heating medium to the heel pressing tool, and the ridges of the branch pipe lining material are removed. A branch pipe lining method characterized by being fixed to the periphery of the branch pipe opening of the main pipe.   The branch pipe lining method according to claim 1, wherein the heat medium is hot water, hot air, or a heated liquid.   The branch pipe lining method according to claim 1 or 2, wherein the heel pressing tool expands into a flat bag shape.   The branch pipe lining method according to claim 1 or 2, wherein the scissors pressing tool comprises a spirally wound tube.   The branch pipe lining method according to claim 1 or 2, wherein a ridge of the branch pipe lining material is formed of a thermosetting resin.   The branch pipe lining method according to claim 1 or 2, wherein a ridge of the branch pipe lining material is formed of a thermoplastic resin.

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