JP5579815B2 - Peripheral part sealing method and peripheral part sealing structure of perforated part formed in rehabilitation pipe - Google Patents

Description

  The present invention relates to a method of sealing a peripheral portion of a perforated portion by forming a perforated portion communicating with a branch portion in a rehabilitated pipe piped in an existing pipe.

  Conventionally, when existing pipes such as water pipes piped underground such as roads have deteriorated, as an example, a method has been adopted in which the rehabilitated pipes are repaired by piping in a superposed state on the inner peripheral surface of the deteriorated existing pipes. (For example, see Patent Document 1 and Patent Document 2).

Japanese Patent Application No. 2011-037012 Japanese Patent Application No. 2011-042164

  However, in the method of repairing the rehabilitated pipe disclosed in Patent Document 1 or Patent Document 2 on the inner peripheral surface of the existing pipe in a superposed state, when the existing pipe is provided with a branching portion and divided, It is necessary to perforate the part that matches the bifurcation part so that the inside of the rehabilitation pipe communicates with the inside of the bifurcation part.To prevent deformation, breakage, water leakage, etc. of the peripheral part of the perforation part, There is a need to keep water in close contact with the base edge.

  Further, as shown in FIG. 24, the sealing body 310 that seals the peripheral portion of the perforated part 360 and the cylindrical holding body 300 that holds the sealing body 310 are sealed at the tip of the outer peripheral surface of the holding body 300. When the stop body 310 is integrally attached in a bowl shape, it is difficult to insert the integral holding body 300 and the sealing body 310 from the upper end opening 330 of the branch portion 320. That is, it is difficult to dispose the holding body 300 in the branch portion 320 in a supported state. Further, even if the integrated holding body 300 and the sealing body 310 can be introduced from the one end opening 350 of the rehabilitation pipe 340, if the difference between the inner diameter of the rehabilitation pipe 340 and the inner diameter of the perforation part 360 is small, the perforation part The holder 300 cannot be inserted into the branch part 320 from 360 and disposed. More specifically, in the case where the rehabilitation pipe 340 is piped to the existing pipe 370 forming the water pipe to form the repair pipe 380, a flanged T-shaped pipe that is a deformed pipe is used as the existing pipe 370 to branch the pipe. 320 may be formed. In this case, since a flanged T-shaped tube used for a fire hydrant or the like is supposed to use a large amount of water in the event of a fire, it is necessary to make the inner diameter of the perforated part 360 as large as possible. In addition, since the branch portion 320 of the flanged T-shaped tube is formed long, it is necessary to form the holding body 300 to be long and adapt to the branch portion 320 to form a branch channel in the holding body 300. However, in that case, the holding body 300 introduced from the one end opening 350 of the rehabilitation pipe 340 through the string-like body 390 cannot be inserted into the branching section 320 through the perforated section 360. For this reason, the holding body 300 cannot be disposed in the branch portion 320, and the peripheral portion of the perforated portion 360 cannot be sealed by the sealing body 310.

  Therefore, the present invention makes it possible to appropriately arrange the holding body and the sealing body at respective predetermined positions even when the difference between the inner diameter of the rehabilitation tube and the inner diameter of the perforated part (or the outer diameter of the holding body) is small. Peripheral part sealing method and peripheral part of perforated part formed in rehabilitated pipe capable of easily and steadily stopping water by bringing the peripheral part of perforated part formed in the pipe into close contact with the base end edge of the branch part An object is to provide a sealing structure.

According to the first aspect of the present invention, there is provided a method for sealing a peripheral portion of a perforated portion formed in a rehabilitated pipe by repairing a rehabilitated pipe that forms a main flow path on an inner peripheral surface of an existing pipe to be repaired in a superposed state. Nonetheless, a branch for diversion is provided in the existing pipe of the repair pipe, and the rehabilitation pipe is formed by drilling the part of the rehabilitation pipe that is aligned with the branch, and the rehabilitation pipe is renovated from one end opening of the rehabilitation pipe. A ring-shaped sealing body that seals the peripheral edge of the perforated part formed in the pipe is introduced, and the sealing body is arranged in the vicinity of the perforated part in the rehabilitation pipe, while the branching flow from the upper end opening in the branching part. Insert the cylindrical holder that forms the path, support the holder at the branch, and form the female thread for connection on the inner peripheral surface of the sealing body, while at the tip of the outer peripheral surface of the holder Is formed on the sealing body by forming a male thread part for coupling and screwing the male thread part for coupling to the female thread part for coupling. The front end portion of the holder is connected, and a fixing male screw portion to which a fixing nut is screwed is formed at the base end portion of the outer peripheral surface of the holding body, and the fixing nut is screwed into the fixing male screw portion. Attaching and tightening, sliding the holding body upward, and contacting the peripheral edge of the upper surface of the sealing body connected to the tip of the holding body into the pressing state from below to the peripheral edge of the perforated part be to, the peripheral portion of the perforated portion is in close contact with the base end edge portion of the branch portion to stop water, the upper end opening of the branch portion, by engaging the fixing nut from above, the bifurcation While holding a holding body, the main flow path formed in a rehabilitation pipe | tube and the branched flow path formed in a holding body are made to communicate.

  In the peripheral portion sealing method of the perforated part formed in the rehabilitation pipe, a cylindrical holding body that forms a branch channel from the upper end opening is inserted into the branch part, and the branch part supports the holder. Introducing a ring-shaped sealing body that seals the peripheral edge of the perforated part formed in the rehabilitation pipe from one end opening of the rehabilitation pipe, and connecting the sealing body to the distal end of the holding body in an externally fitted state. By holding and pressing the peripheral edge of the sealing body against the peripheral edge of the perforated part via the holding body, the peripheral edge of the perforated part and the base end edge of the branching part are brought into close contact with each other and can be easily and firmly stopped. Can be water.

  At this time, the holding body and the sealing body are formed separately from each other, and the holding body is inserted and arranged from the upper end opening of the branch portion, while the sealing body is introduced from the one end opening of the rehabilitation pipe. I am doing so. Therefore, even when the difference between the inner diameter of the rehabilitation tube and the inner diameter of the perforated part (or the outer diameter of the holding body) is small, the holding body and the sealing body can be appropriately arranged at predetermined positions.

  The peripheral portion sealing method of the perforated part formed in the rehabilitated pipe according to the invention of claim 2 is a peripheral part sealing method of the perforated part formed in the renovated pipe according to the invention of claim 1, The sealing body includes a short cylindrical connecting / holding piece connected and held in the outer fitting state at the front end of the holding body, and a flange formed by projecting in a hook shape from the upper peripheral edge of the connecting / holding piece And a ring-shaped seal piece supported by the flange piece and pressed against the peripheral edge of the perforated part.

  In the peripheral portion sealing method of the perforated part formed in the rehabilitation pipe, the sealing body is connected to the tip of the holding body in an externally fitted state and is connected to and held in a short cylindrical connection / holding piece, The holding body includes a flange piece formed by protruding from the peripheral edge of the upper end of the holding piece in a bowl shape, and a ring-shaped sealing piece supported by the flange piece and pressed against the peripheral edge of the perforated part. Through a flange piece that can be connected and held in the outer fitting state with a short-width cylindrical connection / holding piece at the tip of the flange The ring-shaped seal piece can be pressed against the peripheral edge of the perforated part. That is, the seal piece of the sealing body can be pressed against the peripheral portion of the perforated part via the holding body connected to and held by the connection / holding piece, and the peripheral edge of the perforated part and the base edge of the branching part Can be tightly and easily and firmly sealed (water stop) so that water does not flow into the gap between the existing pipe and the rehabilitation pipe.

  A method for sealing a peripheral portion of a perforated part formed in a rehabilitated tube according to a third aspect of the invention is a method for sealing a peripheral portion of a perforated part formed in a rehabilitated tube according to the first or second aspect of the invention. Then, after piping the rehabilitation pipe in a polymerized state on the inner peripheral surface of the existing pipe, after pouring the curable resin from the upper end opening into the branch part, and after the curable resin is cured integrally with a part of the rehabilitation pipe, The integrally cured resin and the rehabilitating pipe are perforated to form a perforated part communicating with the branch part in the rehabilitating pipe.

  In the peripheral portion sealing method of the perforated part formed in such a rehabilitation pipe, the perforated part communicating with the branch part is formed in the rehabilitation pipe by perforating the curable resin and the rehabilitation pipe that are integrally cured, It is possible to prevent formation of a space that causes deformation, breakage, water leakage, or the like of the perforated part between the peripheral part of the perforated part and the base end edge of the branch part.

  For example, when an inwardly concave R-shaped arc surface is formed at the base end peripheral edge of the branching portion, the side cross section is wedge-shaped between the R-shaped arc surface and the peripheral surface of the perforated portion. Although the base end peripheral space is formed, the side cross section is wedge-shaped by pouring the curable resin into the branch portion from the upper end opening and curing the curable resin integrally with a part of the rehabilitation pipe. The curable resin can be filled and cured in the proximal end peripheral space, and the cured resin can remain in the proximal peripheral space even after the perforated portion is formed. As a result, the peripheral edge of the perforated part integrated with the residual cured resin can be firmly stopped by the sealing body, and the water stopping performance by the sealing body can be ensured satisfactorily.

  The peripheral part sealing method of the perforated part formed in the rehabilitation pipe | tube concerning invention of Claim 4 is the peripheral part of the perforated part formed in the rehabilitation pipe | tube concerning invention of any one of Claims 1-3. In the sealing method, the pulling jig is detachably engaged with the connecting / holding piece of the sealing body from below, and the string-like body is connected to the center of the lifting jig through the sealing body, Pass the middle part of the string-like body through the branch part and place it outside the branch part, and pull the string-like body from the outside of the branch part and place the sealing body near the perforated part in the rehabilitation pipe Then, after the sealing body is connected and held in the outer fitting state at the tip of the holding body that is externally fitted to the string-like body, the tension of the string-like body is released and the connection / holding piece is engaged from below. It is characterized by detaching the lifting jig that is present.

  In the method of sealing the peripheral portion of the perforated part formed in the rehabilitated pipe, the sealing body is introduced from one end opening of the rehabilitated pipe and placed in the perforated part, and inserted from the upper end opening of the branch part. The operation of disposing the holding body can be performed easily and firmly from the outside of the branch portion via the string-like body and the lifting jig connected thereto. At this time, the lifting jig is detachably engaged with the sealing body connecting / holding piece from below, and the string-like body is connected to the central portion of the lifting jig through the sealing body. The body can be stably disposed near the perforated portion in the rehabilitation tube, and the holding body can be easily connected to the sealing body. Also, by releasing the tension of the string-like body, the lifting jig engaged with the connecting / holding piece from below can be released, and the lifting jig is introduced into the rehabilitation unit that is introduced integrally with the sealing body. It can be recovered from one end opening or the other end opening of the tube.

The peripheral portion sealing structure of the perforated part formed in the rehabilitated pipe according to the invention described in claim 5 is a repair in which the rehabilitated pipe forming the main flow path is repaired by being superposed on the inner peripheral surface of the existing pipe to be repaired. A pipe, a branch for diversion provided in an existing pipe of a repair pipe, a perforated part of a rehabilitated pipe formed by perforating a part of a rehabilitated pipe that matches the branched part, and a portion near the perforated part in the rehabilitated pipe Therefore, the ring-shaped sealing body that is introduced from one end opening of the rehabilitation pipe and seals the peripheral edge of the perforated part, and inserted into the branching part from the upper end opening part, the base part is supported by the branching part. On the other hand, a cylindrical holding body that connects and holds the sealing body in an externally fitted state at the distal end portion, and a branching passage is formed inside, and a male connection member is provided at the distal end portion of the outer peripheral surface of the holding body. A sealing body is formed by forming a threaded portion and screwing a connecting male screw portion formed on the inner peripheral surface of the sealing body into the connecting female thread portion. The holding body is connected by connecting the distal end portion of the holding body, and forming a fixing male screw portion at the base end portion of the outer peripheral surface of the holding body, and tightening a fixing nut screwed to the fixing male screw portion. The peripheral edge of the sealing body is pressed against the peripheral edge of the perforated part through the holding body, and the peripheral edge of the perforated part and the proximal edge of the branching part are brought into close contact with each other. The water flow is stopped and the main flow path and the branch flow path in the rehabilitation pipe are communicated.

  In the peripheral portion sealing structure of the perforated portion formed in the rehabilitation pipe, a ring-shaped sealing body that seals the peripheral portion of the perforated portion, and a holding body that is cylindrical and that forms a branch channel inside. , Each is formed separately. And the sealing body is introduced from one end opening of the rehabilitation pipe so as to be arranged in the vicinity of the perforated part in the rehabilitation pipe. The holding body is inserted and arranged from the upper end opening of the branch portion. Therefore, even when the difference between the inner diameter of the rehabilitation pipe and the inner diameter of the perforated part is small, the sealing body and the holding body can be appropriately arranged at predetermined positions.

According to the present invention, even when the difference between the inner diameter of the rehabilitating tube and the inner diameter of the perforated part (or the outer diameter of the holding body) is small, the holding part is also adapted to the branching part because the branching part is formed long. Even when it is necessary to form a long film, the holding body and the sealing body can be appropriately arranged at predetermined positions. And the peripheral edge part of the perforation part formed in the rehabilitation pipe | tube and the base end edge part of a branch part can be stuck, and water stop can be performed simply and firmly. As a result, in the present invention, even in a repair pipe having a branched portion rich in change, the peripheral edge portion of the perforated portion formed in the rehabilitated tube and the base end edge portion of the branched portion are brought into close contact with each other easily and firmly. The technology to stop water can be applied.
Further, the fixing nut is screwed to the base end portion of the holding body, and the holding body is slid so as to be pulled up by performing the tightening operation of the fixing nut. The stopper can be brought into surface contact with the peripheral portion of the perforated portion in a pressed state from below, and the peripheral portion of the perforated portion can be reliably sealed with the sealing body.

Explanatory drawing which shows the sealing construction state of the repair pipe | tube as 1st Embodiment. Partial expansion explanatory drawing which shows the sealing construction state of the repair pipe | tube as 1st Embodiment. In the sealing construction of the repair pipe as the first embodiment, the string-like body is arranged in the vicinity of the branch portion via the lifting jig, and the string-like body connected to the lifting jig is passed through the branch portion and pulled out to the outside. Partial expansion explanatory drawing which shows the state. Explanatory drawing, such as a support bar arrange | positioned around the string-like body cut | disconnected in the sealing construction of the repair pipe | tube as 1st Embodiment. Explanatory drawing which shows the state which connected the sealing body and the support bar in sealing construction of the repair pipe | tube as 1st Embodiment. Explanatory drawing, such as a holding body arrange | positioned around the support rod connected with the sealing body in the sealing construction of the repair pipe | tube as 1st Embodiment. Explanatory drawing which shows the state which connected the sealing body and the holding body which were press-contacted to the peripheral part of the piercing | piercing part in the sealing construction of the repair pipe | tube as 1st Embodiment, and supported the holding body in the branch part. Explanatory drawing which shows the sealing state which removed the support rod and the raising jig | tool from the sealing body in the sealing construction of the repair pipe | tube as 1st Embodiment. Explanatory drawing which shows the state which connected the water supply pipe | tube to the branch part used as the sealing state in the sealing construction of the repair pipe | tube as 1st Embodiment. Cross-sectional front explanatory drawing which shows the state by which the rehabilitation pipe | tube before forming a piercing part has been arrange | positioned in the existing pipe | tube. Cross-sectional front explanatory drawing which shows the state which filled the curable resin in the lower part of the branch part by which the lower surface was obstruct | occluded by some rehabilitation pipe | tubes. Cross-sectional front explanatory drawing which shows the state which pierced a part of curable resin with which the lower part of the branch part was filled, and the rehabilitation pipe | tube which has obstruct | occluded the lower surface of the branch part. Cross-sectional side explanatory drawing which shows the state which pierced a part of curable resin with which the lower part of the branch part was filled, and the rehabilitation pipe | tube which has obstruct | occluded the lower surface of the branch part. Front explanatory drawing of a holding body. Cross-sectional side explanatory drawing which shows the state which penetrated the string-like body of the raising jig | tool which attached the sealing body to the support rod. The top view (a), side sectional drawing (b), and perspective view (c) of a sealing body. The top view (a), side sectional drawing (b), and perspective view (c) of a sealing body main piece. A plan view (a) and a partially cutaway view (b) of the lifting jig. The partial notch figure of the sealing body receiving part as a modification. The cross-sectional side view of the state which connected the holding body and the sealing body main piece. Sectional side view (a) and plan view (b) of a branching portion of a repair pipe as a second embodiment. The top view (a) and side sectional drawing (b) of a support body. The partial notch figure which shows the state which connected the branch stopper to the branch part of the repair pipe | tube as 2nd Embodiment. Explanatory drawing of a prior art.

  Below, the sealing structure of the repair pipe as 1st Embodiment which concerns on this invention, and the sealing structure of the repair pipe as 2nd Embodiment are demonstrated, referring drawings.

[Description of Sealing Structure of Repair Pipe as First Embodiment]
G shown in FIG. 1 is a pipe burial site, and H is a pit for repair work. Reference numeral 10 denotes a repair pipe as the first embodiment. The repair pipe 10 is connected to the main flow path on the inner peripheral surface of the existing pipe 20 as the first embodiment which is aged such as a water pipe buried in the pipe burying ground G. It is a pipe repaired by piping and repairing the rehabilitation pipe 30 forming 33. Part of the existing pipe 20 that is difficult to repair is removed, and openings 34 are formed at both ends. The rehabilitation pipe 30 is a nody pipe formed by laminating three layers of a lining material of a polyethylene layer, a resin-impregnated polyester nonwoven fabric layer, and a resin-impregnated glass long fiber layer from the inside to the outside. A rehabilitation pipe 30 is piped in an overlapped state on the inner peripheral surface of the existing pipe 20, and the inner peripheral surface of the existing pipe 20 is covered with the rehabilitation pipe 30 for repair.

  As shown in FIGS. 1 and 2, the existing pipe 20 as the first embodiment is a flanged T-shaped pipe as a deformed pipe having a branch portion 23 for diversion. That is, a cylindrical branch portion 23 extending straightly in the vertical direction is raised and extended integrally at a predetermined location on the upper peripheral surface of the existing pipe 20. Reference numeral 24 denotes a connecting flange portion integrally formed on the upper peripheral edge of the branching portion 23. The connecting flange portion 24 is connected to a water faucet, a water supply pipe, a fire hydrant, etc. so that water can be supplied to the fire hydrant etc. Yes. Reference numeral 90 denotes a connection bolt insertion hole formed in the peripheral edge portion of the connection flange portion 24. In the rehabilitating tube 30, a perforated portion 31 is formed by perforating a portion of the rehabilitated tube 30 that is aligned with the branch portion 23. Hw is a branch working pit formed at a position that matches the position where the branch 23 is formed, and performs the work of sealing the peripheral portion of the perforated part 31 formed in the renovated pipe 30 through the branch working pit Hw. I have to.

[Description of the peripheral sealing structure of the perforated part formed in the rehabilitation pipe]
As shown in FIG. 8, the peripheral part sealing structure of the perforated part 31 formed in the rehabilitation pipe 30 according to the first embodiment forms the main flow path 33 on the inner peripheral surface of the existing pipe 20 to be repaired. The repair pipe 10 was repaired by piping in a superposed state, the diversion portion 23 provided in the existing pipe 20 of the repair pipe 10, and the portion of the rehabilitation pipe 30 aligned with the branch portion 23 was formed. A perforated part 31 of the rehabilitated pipe 30 and an opening part (hereinafter also referred to as “one end open part”) 34 of the rehabilitated pipe 30 to be disposed in the vicinity of the perforated part 31 in the rehabilitated pipe 30 (see FIG. 1) The ring-shaped sealing body 40 that seals the peripheral edge of the perforated part 31 and the branch part 23 that is inserted from the upper end opening 25 to support the base part on the branch part 23 A cylindrical channel that connects and holds the sealing body 40 in an externally fitted state at the tip, and a branch channel 21 is formed inside. A holding member 50 which is provided with a. Then, the peripheral edge of the sealing body 40 is pressed against the peripheral edge of the perforated part 31 via the holding body 50, so that the peripheral edge of the perforated part 31 and the proximal edge of the branch part 23 are brought into close contact with each other. In addition, the main flow path 33 and the branch flow path 21 in the rehabilitation pipe are communicated.

  In the peripheral part sealing structure of the perforated part 31 configured as described above, a ring-shaped sealing body 40 that seals the peripheral part of the perforated part 31 and a holding body that is cylindrical and that forms the branch channel 21 inside. 50 are formed separately from each other. The sealing body 40 is introduced from one end opening 34 (see FIG. 1) of the rehabilitation pipe 30 so as to be disposed in the vicinity of the perforated part 31 in the rehabilitation pipe 30. The holding body 50 is arranged to be inserted from the upper end opening 25 of the branch part 23. Therefore, even when the difference between the inner diameter of the rehabilitation tube 30 and the inner diameter of the perforated part 31 is small, the sealing body 40 and the holding body 50 can be appropriately arranged at predetermined positions.

  Below, the peripheral part sealing structure of the perforated part 31 which concerns on above-described 1st Embodiment is demonstrated more concretely. That is, as shown in FIGS. 10 to 13, after the curable resin 26 is poured into the branch portion 23 from the upper end opening 25 and the curable resin 26 is cured integrally with a part of the rehabilitation pipe 30, The integrally cured curable resin 26 and the rehabilitating pipe 30 are perforated to form a perforated part 31 communicating with the branch part 23 in the rehabilitating pipe 30. The inner diameter of the perforated part 31 is formed substantially the same as the inner diameter of the branch part 23.

  In this way, the curable resin 26 and the rehabilitation pipe 30 that are integrally cured are perforated, and the perforation part 31 that communicates with the branch part 23 is formed in the rehabilitation pipe 30. It is possible to prevent formation of a space that causes deformation, breakage, water leakage, or the like of the perforated part 31 between the base end edge part of the branch part 23.

  That is, as shown in FIG. 10, the base end peripheral portion of the branching portion 23 is formed in an inwardly concave R-shaped arc surface 27, and the R-shaped arc surface 27 and the peripheral portion upper surface of the perforated portion 31 are formed. A proximal end peripheral space 28 having a wedge-shaped side section is formed between the curable resin 26 and the curable resin 26 by pouring the curable resin 26 into the branch portion 23 from the upper end opening. By being cured integrally with a part, the curable resin 26 can be filled and cured in the proximal peripheral space 28 having a wedge-shaped side section, and the proximal peripheral edge is formed even after the perforated portion 31 is formed. The cured resin can remain in the partial space 28. Reference numeral 29 shown in FIGS. 12 and 13 is a residual cured resin formed in a cylindrical shape so as to fill the proximal end peripheral space 28. As a result, the peripheral edge of the perforated part 31 integrated with the residual cured resin 29 can be firmly stopped by the sealing body 40 described later, and the water stopping performance by the sealing body 40 can be ensured satisfactorily. Can do.

  The sealing body 40 is formed in a ring shape that seals the peripheral edge of the perforated portion 31. Then, the peripheral portion of the sealing body 40 is pressed against the peripheral portion of the perforated portion 31 via the holding body 50, so that the peripheral portion of the perforated portion 31 and the base end edge portion of the branching portion 23 are made of the residual cured resin 29. The main flow path 33 in the rehabilitation pipe 30 and the branch flow path 21 in the branch portion 23 are communicated with each other.

  More specifically, as shown in FIGS. 15 to 17, the sealing body 40 supports the seal piece 41 made of an elastic material that is in surface contact with the peripheral portion of the perforated part 31 in a pressed state, and the seal piece 41. And a sealing body piece 42 to be provided. The seal piece 41 is formed in a ring shape that is pressed against the peripheral edge of the perforated portion 31, and at least the upper surface is formed as an arc surface along the inner peripheral surface of the straight tubular rehabilitation tube 30. Therefore, when the upper surface of the seal piece 41 is aligned with the inner peripheral surface of the rehabilitation pipe 30, the seal piece 41 is fitted to the rehabilitation pipe 30, and the upper surface is in surface contact with the inner peripheral surface of the rehabilitation pipe 30. However, when the upper surface of the seal piece 41 is not aligned with the inner peripheral surface of the rehabilitation pipe 30, the seal piece 41 does not fit into the rehabilitation pipe 30 and the upper surface is inside the rehabilitation pipe 30. Positioning is impossible because there is no surface contact with the peripheral surface.

  The sealing body main piece 42 is connected to the distal end portion of the holding body 50 so as to be fitted and held in a fitted state, and is connected to and held in a hook shape from the upper peripheral edge of the connecting / holding piece 43. The flange piece 44 formed by being formed is integrally formed. A connecting female thread portion 45 is formed on the inner peripheral surface of the connecting / holding piece 43. A connecting male screw portion 51 (see FIG. 14) formed at the distal end portion of the outer peripheral surface of the holding body 50 is detachably screwed to the connecting female screw portion 45 so as to be connectable. The upper surface of the flange piece 44 is formed along the lower surface of the seal piece 41. In this embodiment, the flange piece 44 is formed by curving upward in a convex shape. A peripheral wall portion 46 is formed upward at the peripheral edge of the flange piece 44. The flange piece 44 formed in this manner is mounted and fitted with the seal piece 41 in an internally fitted state, and the outer peripheral surface of the seal piece 41 is brought into pressure contact with the inner peripheral surface of the peripheral wall portion 46. The seal piece 41 is not easily detached.

  Thus configured, the holding body 50 arranged in the branch portion 23 and the sealing body 40 arranged in the vicinity of the perforated portion 31 in the rehabilitation pipe 30 are formed on the inner peripheral surface of the connection / holding piece 43. By screwing the connecting male screw portion 51 formed at the distal end portion of the outer peripheral surface of the holding body 50 to the connecting female screw portion 45, it is possible to connect easily and firmly. That is, the sealing body main piece 42 and the holding body 50 in which the seal piece 41 is placed and fitted in the flange piece 44 in the inner fitting state can be connected. The ring-shaped seal piece 41 can be brought into surface contact with the peripheral portion of the punched portion 31 via the holding body 50 connected to and held by the connecting / holding piece 43 and the peripheral portion of the punched portion 31. Can be brought into close contact with the base end edge portion of the branch portion 23 through the residual cured resin 29, and can be easily and firmly sealed (water stoppage) so that water does not flow into the gap between the existing pipe 20 and the rehabilitation pipe 30. )can do.

  As shown in FIG. 15, a pulling jig 60 is detachably engaged with the connecting / holding piece 43 of the sealing body 40 from below. As shown in FIG. 18, the lifting jig 60 carries the sealing body 40 to a position near the branch portion 23, and the holding body 50 inserted into the sealing body 40 and the branch portion 23 from the upper end opening 25. It is a jig whose role is to connect the tip part (lower end part) of. Then, the lifting jig 60 has a center of gravity positioned at the lower part thereof so that a horizontal stable posture is maintained, so that the sealing piece 41 of the sealing body 40 is dropped during the introduction of the sealing body 40. In addition, the string-like body 72 can be pulled up from the branch portion 23 in a horizontal stable posture. The lifting jig 60 includes a sealing body receiving portion 61 that receives the sealing body 40 and a support portion 62 that supports the sealing body receiving portion 61.

  The sealing body receiving portion 61 includes a receiving portion main body 63 formed in a disc shape, and a ring-shaped fitting groove portion in a plan view that is formed on the upper surface of the receiving portion main body 63 and engages with a lower peripheral edge portion of the connecting / holding piece 43. 64 and a peripheral edge receiving portion 65 that receives the outer peripheral surface of the connecting / holding piece 43 and the lower surface of the flange piece 44 in surface contact with each other. A through hole 66 penetrating in the vertical direction is formed in the center of the receiving portion main body 63.

  The support portion 62 is formed of a support plate 70 formed in a disc shape having a slightly smaller diameter than the receiving portion main body 63 and a center support shaft 71 formed so as to penetrate perpendicularly to the center portion of the support plate 70. . A string-like body connection hole 73 for connecting a string-like body 72 such as a rope is formed at the upper end of the center support shaft 71. On the other hand, a wire connection hole 75 for connecting one end of the wire 74 is formed at the lower end portion of the center support shaft 71. The other end of the wire 74 is connected to a midway portion of a cable body 78 described later via a wire connecting piece 79. A support rod connecting male thread portion 76 is formed on the outer peripheral surface of the center support shaft 71. The center support shaft 71 is inserted from below into a through-hole 66 formed in the center of the receiving portion main body 63 so that the upper surface of the support plate 70 is brought into surface contact with the lower surface of the receiving portion main body 63 in a superposed state. The central support shaft 71 and the receiving portion main body 63 are integrally fixed via a key 77 inserted therein.

  As shown in FIG. 15, the support rod 80 connected to the center support shaft 71 is formed in a tubular rod body 81 that extends straight in the vertical direction and projects outward from the upper end of the outer peripheral surface of the rod body 81. The plate-like operation body 82 is formed. The rod main body 81 has a cylinder length longer than the cylinder length of the branch portion 23, so that the operating body 82 can be operated at a position above the branch portion 23. At the lower end portion of the inner peripheral surface of the rod main body 81, a support rod connecting female screw portion 83 is formed which is detachably screwed to the support rod connecting male screw portion 76 so as to be connectable. A string-like body 72 is inserted into the tubular rod body 81 from the lower end and pulled out from the upper end.

  FIG. 19 shows a sealing body receiving portion 61 as a modified example. The sealing body receiving portion 61 includes a receiving portion main body 63 and a central support shaft 71, which are integrally formed. A stepped small diameter portion 85 is formed in the upper part of the outer peripheral surface of the receiving portion main body 63, and the connecting / holding piece 43 can be fitted into the stepped small diameter portion 85 in an outer fitting manner. The center support shaft 71 includes a string-like body connecting hole 73, a wire connecting hole 75, and a support rod connecting male screw part 76.

  As shown in FIGS. 14 and 20, the holding body 50 is formed in a cylindrical shape from a metal material (for example, SUS316), and a columnar branch channel 21 is formed therein, and its tip portion The sealing body 40 is connected and held in an externally fitted state. That is, the holding body 50 has an outer diameter slightly smaller than the inner diameter of the connection / holding piece 43, and a connecting male screw portion 51 is formed at the tip (lower end) of the outer peripheral surface. A connecting male screw portion 51 is detachably screwed to a connecting female screw portion 45 formed on the inner peripheral surface of the connecting / holding piece 43 so that the holding body 50 and the sealing body 40 can be connected. A fixing male screw portion 52 is formed at the base end portion (upper end portion) of the outer peripheral surface of the holding body 50.

  As shown in FIG. 8, a fixing nut 53 is screwed onto the fixing male screw portion 52, and the fixing nut 53 is engaged from above with a connecting flange portion 24 that is integrally formed at the upper peripheral edge of the branch portion 23. It can be stopped. Between the fixing nut 53 and the connecting flange portion 24, a ring-shaped bush 54 and a disk-shaped packing 55 are arranged in a superposed state. A central opening 56 having a diameter slightly larger than the outer diameter of the holding body 50 is formed at the center of the packing 55, and an O-ring 57 that is externally fitted to the outer peripheral surface of the holding body 50 is disposed in the central opening 56. ing. A cylindrical gap 58 is formed between the outer peripheral surface of the holding body 50 and the inner peripheral surface of the branching portion 23, and the holding body 50 and the branching portion 23 are in contact with each other in the cylindrical gap 58. A film 59 is provided to prevent electrical corrosion (electric corrosion). 91 is a bolt hole formed in the packing 55, and the bolt hole 91 is formed in alignment with the connecting bolt insertion hole 90 of the connecting flange portion 24.

  With this configuration, the sealing body 40 is connected to the distal end portion of the holding body 50 in an externally fitted state, and the fixing male screw portion 52 of the holding body 50 protruding above the connecting flange portion 24 is provided. By screwing and tightening the fixing nut 53, the holding body 50 can be slid to be lifted upward. Then, the fixing nut 53 is engaged with the connecting flange portion 24 from above, and the sealing body 40 is brought into contact with the peripheral edge portion of the perforated portion 31 in a pressing state from below and sealed. Thus, the holding body 50 can be held in the branch portion 23. At this time, a ring-shaped bush 54 and a disk-shaped packing 55 are disposed between the fixing nut 53 and the connecting flange portion 24 in a superposed state, and a central opening 56 formed at the center of the packing 55. Since an O-ring 57 that is externally fitted to the outer peripheral surface of the holding body 50 is disposed therein, the upper portion of the outer peripheral surface of the holding body 50 via the O-ring 57 by tightening the fixing nut 53, that is, the cylindrical gap 58. The upper end of the can be sealed.

[Description of the peripheral edge sealing method of the perforated part formed in the rehabilitation pipe]
As shown in FIG. 1, a drum device 100 is installed in a pipe burying site G that is a construction site, and the repair pipe 10 is repaired by a rope 78 wound around a winding drum 110 that constitutes the drum device 100. The sealing body 40 is introduced into the inside through a pulling jig 60. That is, as shown in FIG. 1, the drum device 100 includes a long cable body 78 having a bullet-shaped head 120 attached to the tip thereof, and a winding in which the cable body 78 is wound so as to be fed out and wound up. It consists of a drum 110. The other end of the cord-like body 72 having one end attached to the cord-like body connecting piece 121 at the portion of the cord body 78 located in the vicinity of the head 120, and one end via the wire connecting piece 79 in the middle of the cord body 78 A lifting jig 60 that locks the sealing body 40 is interposed between the other ends of the connected wires 74 so that the lifting jig 60 follows the sliding movement of the cable body 78 and moves. ing.

  The cable body 78 is flexible, and by applying a force in a direction of feeding from the winding drum 110 side, the bottom surface of the repair pipe 10 can be moved to the extent that the head 120 can be advanced in the repair pipe 10. It has elasticity that can maintain linearity against the frictional force between the two. For example, such a cable body 78 can be made of glass fiber having a diameter of about 5 mm to 20 mm and a length of about 50 m to 150 m, which is lightweight and excellent in straightness. A number of lifting jigs 60 corresponding to the number of the branch portions 23 are connected to the cable body 78 in the extending direction, and sealing work is performed by the sealing bodies 40 sequentially locked to the lifting jig 60. Yes.

  The peripheral part sealing method of the perforated part 31 formed in the rehabilitation pipe | tube 30 which concerns on 1st Embodiment is performed in the following procedures. That is, as shown in FIGS. 10 to 13, the repair pipe 10 is formed by piping the rehabilitation pipe 30 that forms the main flow path 33 on the inner peripheral surface of the existing pipe 20 to be repaired in a superposed state. A perforated part 31 is formed in the rehabilitated pipe 30 by perforating the part of the rehabilitated pipe 30 that is aligned with the branching part 23 for diversion provided integrally with the existing pipe 20 of the repair pipe 10. As shown in FIGS. 1-3, while introducing the ring-shaped sealing body 40 which seals the peripheral part of the perforation part 31 formed in the rehabilitation pipe 30 from the one end opening part 34 of the rehabilitation pipe 30, the rehabilitation pipe | tube The sealing body 40 is disposed in the vicinity of the perforated part 31 in the 30. On the other hand, as shown in FIGS. 4 to 8, a cylindrical holding body 50 that forms the branch flow path 21 is inserted into the branching portion 23 from the upper end opening 25, and the holding body 50 is supported by the branching portion 23. Let The sealing body 40 is connected and held in the outer fitting state at the distal end portion of the holding body 50, and the peripheral edge portion of the sealing body 40 is pressed to the peripheral edge portion of the perforated part 31 through the holding body 50. By doing so, the peripheral edge portion of the perforated portion 31 and the proximal end edge portion of the branch portion 23 are brought into close contact with each other to stop water, and are formed in the main flow path 33 and the holding body 50 formed in the rehabilitation pipe 30. The branch channel 21 can be communicated.

  In the method for sealing the peripheral edge of the perforated part 31 formed in the rehabilitation pipe 30, as shown in FIGS. 4 to 8, as shown in FIGS. 4 to 8, a cylindrical shape that forms the branch flow path 21 from the upper end opening 25 in the branch part 23. A ring-shaped seal that inserts the holding body 50 to support the holding body 50 on the branch portion 23 and seals the peripheral portion of the perforated portion 31 formed in the rehabilitating tube 30 from the one end opening 34 of the rehabilitating tube 30. The stopper 40 is introduced, and the sealing body 40 is connected and held in the outer fitting state at the tip of the holding body 50, and the peripheral edge of the sealing body 40 is connected to the peripheral edge of the perforated part 31 via the holding body 50. By pressing, the peripheral edge of the perforated part 31 and the base edge of the branch part 23 can be brought into close contact with each other and water can be stopped easily and firmly.

  At this time, the holding body 50 and the sealing body 40 are formed separately from each other. The holding body 50 is inserted and arranged from the upper end opening 25 of the branch part 23. On the other hand, the sealing body 40 is introduced from one end opening 34 of the rehabilitation pipe 30. Therefore, even when the difference between the inner diameter of the rehabilitation pipe 30 and the inner diameter of the perforated part 31 (or the outer diameter of the holding body) is small, the holding body 50 and the sealing body 40 can be appropriately disposed at predetermined positions, respectively. .

  That is, when the holding body 50 and the sealing body 40 are integrally formed, it is difficult to insert the integral holding body 50 and the sealing body 40 from the upper end opening 25 of the branch portion 23. Further, even if the integrated holding body 50 and the sealing body 40 can be introduced from the one end opening 34 of the rehabilitation pipe 30, if the difference between the inner diameter of the rehabilitation pipe 30 and the inner diameter of the perforation part 31 is small, the perforation part It is not possible to insert / place the holding body 50 into the branch portion 23 from 31 (see FIG. 24). As in the first embodiment, when the rehabilitation pipe 30 is piped to the existing pipe 20 forming the water pipe to form the repair pipe 10, a flanged T-shaped pipe that is a deformed pipe is used as the existing pipe 20. Thus, a branch portion 23 is formed. In this case, since the flanged T-shaped tube used for a fire hydrant or the like is supposed to use a large amount of water in the event of a fire, it is necessary to form the inner diameter of the perforated portion 31 as large as possible. In addition, since the branch portion of the flanged T-shaped tube is formed long, the holding body 50 also needs to be formed in a long length so as to be adapted to the branch portion 23, but in this case, from the one end opening 34 of the rehabilitation tube 30. The introduced holding body 50 cannot be inserted / placed from the perforated part 31 into the branch part 23. However, in the first embodiment, such a problem can be solved.

  Here, the arrangement method of the sealing body 40 is performed in the following procedure. That is, the lifting jig 60 is detachably engaged with the connecting / holding piece 43 of the sealing body 40 from below. A string-like body 72 is connected to the center of the lifting jig 60 through the sealing body 40. The middle part of the string-like body 72 is passed through the branch part 23 and arranged outside the branch part 23, and the string-like body 72 is pulled from the outside of the branch part 23 and the sealing body 40 is renewed by the lifting jig 60. The tube 30 is disposed in the vicinity of the perforated part 31. The sealing body 40 is connected and held in an externally fitted state at the tip of the holding body 50 that is externally fitted to the string-like body 72. Thereafter, the pulling jig 60 engaged with the connection / holding piece 43 from below is released by releasing the tension of the string-like body 72.

  In the method of sealing the peripheral portion of the perforated part 31 formed in the rehabilitated pipe 30, the disposing operation of the sealing body 40 introduced from the one end opening 34 of the rehabilitated pipe 30 and disposed in the perforated part 31, and the branching part 23. The arrangement of the holding body 50 to be inserted and arranged from the upper end opening 25 can be performed easily and firmly from the outside of the branch part 23 through the string-like body 72 and the lifting jig 60 connected thereto. . At this time, the lifting jig 60 is detachably engaged with the connecting / holding piece 43 of the sealing body 40 from below, and the string-like body 72 is connected to the center of the lifting jig 60 through the sealing body 40. Therefore, the sealing body 40 can be stably disposed in the vicinity of the perforated portion 31 in the rehabilitation pipe 30, and the holding body 50 can be easily connected to the sealing body 40. Further, by releasing the tension of the string-like body 72, the pulling jig 60 engaged with the connecting / holding piece 43 from below can be released, and the pulling jig 60 is integrated with the sealing body 40. The rehabilitation pipe 30 introduced into the regenerator can be recovered from the opening 34 at one end or the opening 34 at the other end.

  Next, the procedure of the peripheral part sealing method of the perforation part 31 formed in the rehabilitation pipe | tube 30 which concerns on 1st Embodiment is demonstrated more concretely.

  (1) As shown in FIGS. 10 to 13, after the curable resin 26 is poured from the upper end opening 25 of the branch portion 23 and the curable resin 26 is cured, it is integrally formed on the upper peripheral edge of the branch portion 23. A punching machine (not shown) is disposed in the flange portion 24, and the resin cured by the punching machine and the rehabilitation pipe 30 are punched. As a result, the residual curing resin 29 is formed in a cylindrical shape and filled in the proximal end peripheral space 28. Therefore, the gap of the R portion can be filled, and the strength of the peripheral portion of the perforated portion 31 formed in the rehabilitation pipe 30 can be increased.

  (2) As shown in FIG. 2, the pulling jig 60 is detachably engaged with the connecting / holding piece 43 of the sealing body 40 from below. At this time, the seal piece 41 is placed and fitted into the flange piece 44 of the sealing body main piece 42 in an internally fitted state. The lifting jig 60 is connected to the rope body 78 via the string-like body 72 and the wire 74.

  (3) As shown in FIG. 1, the drum device 100 pushes the lifting jig 60 that locks the sealing body 40 from the one end opening 34 of the rehabilitation pipe 30 toward the internal extension direction of the repair pipe 10. To introduce. When the sealing body 40 is moved to the vicinity of the branch portion 23, as shown in FIG. 2, a string-like body lifting rod 130 having a hook 131 at the tip is inserted from the upper end opening 25 of the branch portion 23, and the string The hook 131 is locked in the middle part of the shaped body 72.

  (4) As shown in FIG. 3, by pulling up the string-like body lifting rod 130 through the branch portion 23, the string-like body 72 is pulled out to the outside of the branch portion 23 and pulled out to the outside of the branch portion 23. The middle part of 72 is cut by the cutting tool 140.

  (5) As shown in FIGS. 4 and 5, the tubular rod body 81 of the support rod 80 is fitted on the end of the string-like body 72 on the side connected to the lifting jig 60, and the string-like body 72. The support rod 80 is lowered along the support rod 80, and the support rod connecting male screw portion 76 formed on the outer peripheral surface of the central support shaft 71 of the lifting jig 60 is connected to the support rod formed on the lower end portion of the inner peripheral surface of the rod body 81. The connecting female screw portion 83 is screwed and connected.

  (6) As shown in FIGS. 6 and 7, the holding body 50 is externally fitted to the support rod 80, and the holding body 50 is inserted into the branch portion 23 in the same state. Then, while pulling up the lifting jig 60 while holding the operating body 82 of the support rod 80, the connecting female screw portion 45 formed on the inner peripheral surface of the connecting / holding piece 43 is formed at the tip of the outer peripheral surface of the holding body 50. The connected male screw portion 51 is screwed and connected. At this time, the operation piece 82 is appropriately rotated around the axis of the rod body 81, and the seal piece 41 is positioned by bringing the upper surface of the seal piece 41 into surface contact with the inner peripheral surface of the rehabilitation pipe 30. By doing so, the adhesiveness of the rehabilitation pipe | tube 30 and the seal piece 41 can be ensured favorable. In this case, the holding body 50 is greatly protruded upward from the upper end opening 25 of the branch portion 23.

  (7) As shown in FIG. 7, the holding body 50 and the branching portion 23 come into contact with each other in a cylindrical gap 58 formed between the outer peripheral surface of the holding body 50 and the inner peripheral surface of the branching portion 23. A film 59 for preventing electrical corrosion (electric corrosion) is provided.

  (8) As shown in FIG. 7 and FIG. 8, the holding nut 53 is screwed onto the fixing male screw portion 52 of the holding body 50 protruding above the connecting flange portion 24 and tightened. The body 50 is slid upward. Then, the fixing nut 53 is engaged with the connecting flange portion 24 from above, and the sealing body 40 is brought into contact with the peripheral portion of the perforated portion 31 in a pressing state from below to seal the holding body 50. It is held in the branch part 23. At this time, a ring-shaped bush 54 and a disk-shaped packing 55 are disposed between the fixing nut 53 and the connecting flange portion 24 in a superposed state, and a central opening 56 formed at the center of the packing 55. An O-ring 57 that is externally fitted to the outer peripheral surface of the holding body 50 is disposed therein. By doing so, the upper part of the outer peripheral surface of the holding body 50, that is, the upper end of the cylindrical gap 58 can be sealed via the O-ring 57 by tightening the fixing nut 53.

  That is, when the fixing nut 53 is tightened, the seal piece 41 is compressed inside the rehabilitation pipe 30, and the O-ring 57 and the packing 55 are compressed outside the rehabilitation pipe 30. The seal piece 41 is strongly compressed to the peripheral edge of the perforated part 31 of the rehabilitation pipe 30 to stop water, and the packing 55 and the O-ring 57 are strongly pressed by the fixing nut 53 in the connecting flange part 24 of the branch part 23. The water is stopped by being sandwiched between the outer periphery of the connecting flange portion 24 and the holding body 50 and the bush 54.

  (9) As shown in FIG. 8, the support bar 80 is detached from the lifting jig 60. At this time, since the inner peripheral surface of the rehabilitating pipe 30 in the branch portion 23 is a curved surface, the sealing body 40 is pressed into engagement with the curved surface via the lifting jig 60. When the sealing body 40 is rotated along the surface, the curved surface becomes a rotation stop, so that the support rod 80 can be joined and detached. In addition, when the female and male screw portions are joined and detached, it is necessary to perform work while applying tension to the string-like body 72 and the support rod 80 with the curved surface as a rotation stop.

  (10) The pulling jig 60 engaged with the connecting / holding piece 43 from below is released by releasing the tension of the string-like body 72. The lifting jig 60 is collected from the opening 34 at one end of the rehabilitation pipe 30 introduced integrally with the sealing body 40 or the opening 34 at the other end.

  (11) As shown in FIG. 9, a water supply pipe 150, a water faucet, a fire hydrant, and the like can be attached to the connecting flange portion 24. 151 is a water supply pipe connection bolt inserted into the connection bolt insertion hole 90, and 152 is a water supply pipe connection nut.

[Effect of the first embodiment]
(1) Even if the difference between the inner diameter of the rehabilitating tube 30 and the outer diameter of the holding body 50 is reduced, the holding body 50 and the sealing body 40 can be disposed on the branch portion 23. Here, the arrangement limit of the holding body 50 and the sealing body 40 to the branching portion 23 is possible if the sealing body 40 can rotate 90 degrees at the branching portion 23 in the rehabilitation pipe 30. is there.

  (2) Even if the branch part 23 is long, the holding body 50 and the sealing body 40 can be arranged.

  (3) When the rehabilitation pipe 30 is piped on the existing pipe 20, the branch part 23 is filled with the curable resin 26, and when the curable resin 26 is cured, the holding body 50 arranged on the branch part 23 has a strong tension. Even if it adds, since the peripheral part of the perforated part 31 integrated with the residual cured resin 29 is reinforced with the residual cured resin 29, the waterproof performance by the sealing body 40 is obtained in a stable state.

(4) Relationship between the holding body 50 and the sealing body 40 in the repair pipe 10 By providing the connecting female holding portion 45 on the connecting / holding piece 43 integrally formed with the flange piece 44, It becomes easy to screw and connect the connecting male screw portion 51 formed at the tip of the outer peripheral surface of the holding body 50. By providing the connecting female screw portion 45 on the inner surface of the short cylindrical connecting / holding piece 43 from the upper surface to the lower portion of the flange piece 44, the water stopping performance is improved because there is no joint at the water stopping portion. Since the peripheral wall portion 46 is formed so as to rise upward at the peripheral edge of the flange piece 44, the seal piece 41 placed and fitted in the peripheral wall portion 46 in an internally fitted state is the inner surface of the rehabilitating tube 30 and the holding body. Since it is pinched | interposed into 50 outer peripheral surfaces and compressed uniformly, high water stop performance is obtained. By using the lifting jig 60, the sealing body 40 and the holding body 50 can be easily joined.

[Description of Sealing Structure of Repair Pipe as Second Embodiment]
In the repair pipe 10 of the second embodiment, the existing pipe 20 is formed in a straight shape, and the branch portion 23 is not integrally formed. In the second embodiment, the branch portion 23 is attached to the existing pipe 20 at the time of repair. The inner and outer perforated portions 31 and 160 are formed at positions matching the existing pipe 20 and the branch portion 23 of the rehabilitated pipe 30 disposed in the existing pipe 20, and the inner perimeter of the perforated portion 31 is the first. It seals with the sealing body 40 formed separately and the holding body 50 similarly to the embodiment.

  First, the attachment structure of the branch part 23 is demonstrated. That is, as shown in FIG. 21, the branch portion 23 includes a branch portion main body 170 formed in a cylindrical shape, and an attachment body 180 that attaches the branch portion main body 170 to the outer peripheral surface of the repair pipe 10. A connecting flange portion 171 whose outer shape is formed in a rectangular frame shape is integrally formed at the upper peripheral edge of the branch portion main body 170. Reference numeral 172 denotes a bolt insertion hole formed in the connecting flange portion 171. The attachment body 180 includes an upper half attachment piece 181 integrally formed with the branch portion main body 170 in the middle portion, and a lower half attachment piece 182 connected to the upper half attachment piece 181 in an opposing state. The upper half attachment piece 181 is formed in a band shape, and is attached to both ends of the upper half attachment piece 183 formed in a curved shape along the upper half of the outer peripheral surface of the repair pipe 10 and the upper half attachment piece 183. It is formed from a pair of upper half mounting ear pieces 184 and 184 formed so as to protrude substantially horizontally outward. The lower half attachment piece 182 is formed in a belt shape, and is attached to both ends of the lower half attachment piece 185 formed in a curved shape along the lower half portion of the outer peripheral surface of the repair pipe 10 and the lower half attachment piece 185. It is formed from a pair of lower half mounting ear pieces 186 and 186 formed so as to protrude substantially horizontally outward. The upper half mounting ear pieces 184 and 184 and the lower half mounting ear pieces 186 and 186 are respectively formed with connecting bolt insertion holes 187 and 188 that are aligned to face each other, and the connecting bolt insertion holes 187 and 188 have connecting bolts. 189 is inserted, and a connection nut 190 is screwed to the connection bolt 189.

  Thus, the branch part 23 is comprised and the branch part 23 can be attached to the desired location of the repair pipe | tube 10. FIG. That is, the upper half attachment piece 181 and the lower half attachment piece 182 are arranged in a facing state at a desired location on the outer peripheral surface of the repair pipe 10, and the opposed upper half attachment ear pieces 184 and 184 and the lower half attachment ears are arranged. By inserting the connecting bolts 189, 189 into the connecting bolt insertion holes 187, 187, 188, 188 of the pieces 186, 186 and screwing the connecting nuts 190, 190 to the connecting bolts 189, 189, the repair pipe 10 is The branch part 23 can be attached so as to be held from above and below. At this time, the branch portion main body 170 is disposed so as to protrude upward from the upper end portion of the outer peripheral surface of the repair pipe 10. Subsequently, a punching machine (not shown) is disposed in the connecting flange portion 171 of the branching section main body 170, and the existing pipe 20 and the renovated pipe 30 disposed in the existing pipe 20 are passed through the branching section main body 170 by the punching machine. The inner and outer perforated portions 31 and 160 having a slightly smaller diameter than the inner diameter of the branching portion main body 170 are formed. In this way, the branch portion 23 can be formed at a desired location of the repair pipe 10. At this time, the attachment body 180 partially reinforces the outer peripheral surface of the repair pipe 10.

  Next, the sealing body 40 is arranged in the rehabilitation pipe 30 in the same procedure as in the first embodiment described above, while the holding body 50 is arranged in the branch part 23, and the peripheral edge of the perforated part 31 by the holding body 50. The sealing body 40 is brought into a pressed state from below and held in a sealed state. At this time, in the second embodiment, the support body 191 is disposed in the branch portion 23 so that the sealing body 40 and the holding body 50 are supported by the support body 191.

  The features of the second embodiment will be specifically described. As shown in FIG. 22, the support 191 is formed in a short cylindrical shape whose upper and lower surfaces are opened by an elastic material such as rubber. That is, the support body 191 has an outer diameter that is substantially the same as the inner diameter of the branch body 170, and the vertical width that is the axial direction is slightly longer than the vertical width of the branch body 170. The inner peripheral surface of the support body 191 has a stepped portion 199 formed in a stepped manner from an upper half portion 192 having a relatively large diameter and a lower half portion 193 having a relatively small diameter. The inner diameter of the lower half 193 is formed to be substantially the same as the outer diameter of the holding body 50, while being slightly larger than the outer diameter of 50. The lower end surface 194 of the support body 191 is formed in an arc shape in which the upper surface of the peripheral edge portion of the outer perforated portion 160 formed in the rehabilitation pipe 30 is in surface contact with the entire surface. In the cylindrical space 195 formed between the inner peripheral surface of the upper half 192 of the support body 191, the outer peripheral surface of the holding body 50, and the upper surface of the stepped portion 199, a male screw portion for fixing the holding body 50 is provided. A fixing nut 196 screwed to 52 and a ring-shaped bush 197 externally fitted to the holding body 50 can be disposed. Reference numeral 198 denotes a rotation operation hole formed in the fixing nut 196.

  The support body 191 formed as described above is disposed in the branch portion 23, and the lower end surface 194 of the support body 191 is brought into full surface contact with the upper surface of the peripheral edge portion of the outer perforated portion 160 formed in the existing pipe 20. Then, the holding body 50 is press-fitted into the support body 191, and the connecting male screw portion 51 formed at the distal end portion (lower end portion) of the holding body 50 is connected to the connecting female screw portion 45 formed in the connecting / holding piece 43. On the other hand, the fixing nut 196 is screwed to the fixing male screw portion 52 formed on the base end portion (upper end portion) of the holding body 50, and the fixing nut 196 is attached to the upper surface of the step portion 199. Engage. Then, by rotating the fixing nut 196 with a rotating tool (not shown) and relatively raising the holding body 50, the sealing body 40 is attached to the peripheral portion of the perforated part 31 of the rehabilitation pipe 30. It can be pressed to seal (stop water). Further, the outer peripheral surface of the upper end portion of the holding body 50 and the inner peripheral surface of the support body 191 are sealed by pressing a bush 197 disposed on the step portion 199 with a fixing nut 196. At this time, the support body 191 is pressurized (compressed) in the vertical direction that is the axial direction thereof, so that the inner and outer peripheral surfaces are expanded in the radial direction to improve the sealing performance with the holding body 50. Moreover, since the upper surface of the peripheral part of the perforated part 31 formed in the rehabilitating pipe 30 is in full surface contact with the lower end surface of the support body 191, the inner peripheral surface of the branch part 23 is supported by the elastically deformable support body 191. And a space that causes deformation, breakage, water leakage, or the like of the perforated part 31, particularly between the peripheral part of the perforated part 31 and the base end edge of the branch part 23. The formation can be prevented.

  As shown in FIG. 23, the upper end peripheral portion 240 of the support body 191 is disposed so as to protrude upward from the upper surface of the connecting flange portion 171, while the water faucet flange portion 210 formed at the lower portion of the water faucet 200. A fitting recess 220 is formed on the lower surface of the. When the lower surface of the water faucet flange portion 210 is joined to the upper surface of the connection flange portion 171, the upper peripheral edge portion 240 of the support body 191 is fitted into the fitting recess 220 and pressurized in the vertical direction ( Therefore, the inner and outer peripheral surfaces of the upper end peripheral portion 240 of the support 191 are expanded in the radial direction, and the sealing performance (water blocking performance) can be improved. At this time, since the joined connecting flange portion 171 and the water faucet flange portion 210 can be positioned, the connecting flange portion 171 and the water faucet flange portion 210 can be simply and firmly connected by the connecting bolt 230. Can do.

DESCRIPTION OF SYMBOLS 10 Repair pipe 20 Existing pipe 30 Rehabilitation pipe 31 Perforated part 40 Sealing body 41 Sealing piece 42 Sealing body main piece 50 Holding body 60 Lifting jig 72 String-like body 74 Wire 78 Rope body 80 Support rod

Claims (5)

The rehabilitating pipe that forms the main flow path on the inner peripheral surface of the existing pipe to be repaired is replaced with a repair pipe, and a branch for diversion is provided on the existing pipe of the repair pipe and aligned with the branch. By drilling a part of the rehabilitation tube, a perforated part is formed in the rehabilitation tube,
While introducing a ring-shaped sealing body that seals the peripheral portion of the perforated part formed in the rehabilitation pipe from one end opening of the rehabilitation pipe, and arranging the sealing body in the vicinity of the perforated part in the rehabilitation pipe,
Insert a cylindrical holder that forms a branch channel from the upper end opening in the branch part, and support the holder in the branch part,
A female thread portion for connection is formed on the inner peripheral surface of the sealing body, while a male screw portion for connection is formed at the tip of the outer peripheral surface of the holder, and the male screw portion for connection is screwed to the female thread portion for connection. By attaching the tip of the holder to the sealing body,
A fixing male screw portion to which a fixing nut is screwed is formed at the base end portion of the outer peripheral surface of the holding member, and the fixing nut is screwed and tightened to the fixing male screw portion to fix the holding member. The peripheral portion of the perforated portion is slid so as to be pulled upward, and the peripheral portion of the upper surface of the sealing body connected to the distal end portion of the holding body is brought into surface contact with the peripheral portion of the perforated portion in a pressed state from below. And the base end edge of the branch part are closely attached to stop water ,
At the upper end opening of the branching portion, the holding nut is retained from above by locking the fixing nut from above, and the main channel formed in the rehabilitation pipe and the branch channel formed in the holding body are provided. A method for sealing a peripheral portion of a perforated portion formed in a rehabilitating tube, wherein the peripheral portion is communicated.   The sealing body includes a short cylindrical connecting / holding piece connected and held in the outer fitting state at the front end of the holding body, and a flange formed by projecting in a hook shape from the upper peripheral edge of the connecting / holding piece The peripheral part sealing of the perforated part formed in the rehabilitation pipe | tube of Claim 1 provided with the piece and the ring-shaped sealing piece supported by the flange piece and press-contacted to the peripheral part of a perforated part Method. After piping the rehabilitation pipe to the inner peripheral surface of the existing pipe in a polymerized state, the curable resin is poured into the branch part from its upper end opening,
Claims: After the curable resin is integrally cured with a part of the rehabilitation pipe, the integrally cured resin and the rehabilitation pipe are perforated to form a perforated portion communicating with the branch portion in the rehabilitation pipe. Item 3. A method for sealing a peripheral portion of a perforated portion formed in a rehabilitated tube according to item 1 or 2.   A lifting jig is detachably engaged with the connecting / holding piece of the sealing body from below, and a string-like body is connected to the center of the lifting jig through the sealing body, and the middle part of the string-like body is Pass through the branching part and place it outside the branching part, pull the string-like body from the outside of the branching part and place the sealing body in the vicinity of the perforated part in the rehabilitation pipe with the lifting jig. After the sealing body is connected and held in the externally fitted state at the tip of the fitted holding body, the tension of the string-like body is released and the lifting jig engaged with the connecting / holding piece from below is released. The peripheral part sealing method of the perforated part formed in the rehabilitation pipe | tube of any one of Claims 1-3 characterized by the above-mentioned. A repair pipe that is repaired by piping a rehabilitation pipe that forms a main channel on the inner peripheral surface of the existing pipe to be repaired into a superposed state;
A branch for diversion provided in the existing pipe of the repair pipe,
A perforated portion of a rehabilitated tube formed by perforating a portion of the rehabilitated tube aligned with the bifurcation, and
A ring-shaped sealing body that is introduced from one end opening of the rehabilitation pipe to be disposed in the vicinity of the perforation part in the rehabilitation pipe, and seals the peripheral part of the perforation part;
Inserted into the branch part from its upper end opening, the base part is supported by the branch part, while the distal end part is formed in a cylindrical shape for connecting and holding the sealing body in an externally fitted state, and a branch channel is formed inside Holding body,
Comprising
A connecting male screw portion is formed at the tip of the outer peripheral surface of the holding body, and the connecting male screw portion formed on the inner peripheral surface of the sealing body is screwed to the connecting female screw portion to thereby seal the sealing body. And connecting the tip of the holder to
A fixing male screw part is formed at the base end portion of the outer peripheral surface of the holding body, and the holding body is slid to be pulled upward by tightening a fixing nut screwed to the fixing male screw part. The peripheral edge of the sealing body is pressed against the peripheral edge of the perforated part via the holding body, so that the peripheral edge of the perforated part and the proximal end edge of the branching part are brought into close contact with each other and water is stopped. A peripheral portion sealing structure for a perforated portion formed in a rehabilitating pipe, wherein the main channel and the branch channel are communicated.

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