JP2015105658A - Existing pipe renovation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform an efficient renovation of an existing pipe by smoothly making a renovation pipe having a larger diameter than an inlet diameter of a manhole and having a high rigidity under application of a band-like member composed of a resin band-like body and a metallic reinforcing material.SOLUTION: After a band-like member 100 having a reinforcing material is continuously deformed in plastic form to have a substantially equal radius of curvature to an inlet diameter of a manhole M on the ground and drawn into the manhole M, the band-like member 100 in the manhole M is continuously deformed in plastic to a substantially equal radius of curvature to a radius of curvature of a regeneration pipe S having a larger diameter than an inlet diameter of the manhole M and supplied to a pipe forming machine 2, the pipe forming machine 2 in the manhole M is rotated in revolution around an axis of an existing pipe K to manufacture the regeneration pipe S and at the same time, the regeneration pipe S is drawn and the regeneration pipe S is inserted into the existing pipe K without winding.

Description

  The present invention relates to a method for rehabilitating existing pipes such as aged sewer pipes, water pipes, agricultural water pipes, and gas pipes.

  Conventionally, a band-shaped member having a metal reinforcing material continuous in the longitudinal direction is drawn into a manhole while joining portions are formed on both side edges, and the band-shaped members are installed in the manhole and adjacent to each other. Are supplied to a pipe making machine having a joining mechanism that joins the joints of the two, and the supplied belt-like member is spirally wound by a pipe making machine that revolves around the axis of an existing pipe in a manhole, and is adjacent to each other. It has been proposed to join the joints to produce a rehabilitated pipe, to pull the regenerated pipe produced into the existing pipe, and to rehabilitate the existing pipe with the rehabilitated pipe (see, for example, Patent Document 1). ).

  As shown in FIG. 8, the belt-shaped member 100 includes a belt-shaped body 110 and a reinforcing member 120 attached to the belt-shaped body 110.

  The belt-shaped body 110 is formed by extrusion molding a flexible synthetic resin, for example, hard vinyl chloride, polyethylene, polypropylene, or the like, and a plurality of strips (two in the embodiment) are formed on the back surface of the strip-shaped substrate 111. Reinforcing ribs 112 having a T-shaped cross section are provided with their tips positioned parallel to the substrate 111. A bonding projection 113 as a bonding portion is erected on the back surface of one side edge portion of the substrate 111. Further, the other side edge portion of the substrate 111 is formed in a stepped portion 114 that has been stepped down to the back side by the thickness of the substrate 111 so that the side edge portion of the substrate 111 provided with the bonding convex portion 113 is disposed. In the stepped portion 114, a joint recess 115 is provided as a joint portion into which the joint projection 113 can be fitted. An inclined rib 116 is formed in the bonding recess 115 so as to be positioned on the protruding side of the bonding recess 115 as it is away from the substrate 111, and the tip of the inclined rib 116 forms one side edge of the strip 110. Forming.

  The reinforcing material 120 is formed by processing a strip-shaped steel plate continuous in the longitudinal direction into a substantially W-shaped cross section, and is mounted over a plurality of reinforcing ribs 112 of the strip-shaped body 110.

  Such a belt-shaped member 100 is wound around a drum D (see FIG. 1) in a hollow cylindrical shape, transported to a construction site, pulled out from the inner peripheral side of the drum D at the construction site, That is, it is supplied to the pipe making machine so that the side on which the reinforcing ribs 112 and the like are erected is the outer peripheral side. And the strip | belt-shaped member 100 is wound helically with a pipe making machine, the junction part of the strip | belt-shaped members 100 and 100 adjacent to each other is joined, and it is pipe-formed to the rehabilitation pipe | tube of a predetermined | prescribed pipe diameter. Specifically, in the pipe making machine, as shown in FIGS. 8A and 8B, among the strip-shaped members 100, 100 adjacent to each other, the joining convex portion 113 of the subsequent strip-shaped member 100 is preceded by the strip-shaped member. By fitting into the joint recess 115 of the member 100 from the inside (the inner peripheral side of the preceding belt-like member 100), the belt-like members 100, 100 adjacent to each other are joined together to produce a rehabilitated tube.

  At this time, the side edge portion of the substrate 111 on which the joining convex portion 113 of the subsequent belt-like member 100 is provided is disposed at the stepped portion 114 of the preceding belt-like member 100, and the inclined rib 116 of the preceding belt-like member 100 is provided. The belt-shaped member 100 that follows is locked to the reinforcing rib 112 on the side where the joint convex portion 113 is provided.

JP 2000-149049 A

  By the way, in the above-described prior art, the belt-shaped member wound around the drum in a hollow cylindrical shape and transported to the construction site corresponds to the inlet diameter (600 mm) of the manhole and has a small diameter on the ground by a curvature radius converter. It is made to plastically deform to a radius of curvature substantially equal to the diameter of the rehabilitated pipe and is supplied to the pipe making machine through a manhole.

  However, if the pipe diameter of the existing pipe is larger than the medium diameter, for example, 1000 mm or more, the belt-shaped member that is plastically deformed to a small radius of curvature so as to pass through the manhole is forcibly wound by the pipe making machine. A rehabilitation pipe with a large radius of curvature will be produced. For this reason, a large reaction force acts on the joining mechanism of the pipe making machine, making it difficult to smoothly perform the pipe making work. In addition, the strip-shaped member of the renovated pipe that has been piped contains a restoring force so as to restore the small radius of curvature previously plastically deformed. That is, the restoring force acts so as to separate the joining portions of the adjacent band-like members joined by the joining mechanism of the pipe making machine. At this time, if the joined portion is detached, it is difficult for the worker to join the band-like member having a large rigidity, and the pipe making work of the rehabilitated pipe cannot be performed continuously. Such a tendency becomes more prominent as the diameter of the rehabilitation pipe increases.

  The present invention has been made in view of such a point, and a rehabilitation pipe having a diameter larger than the inlet diameter of the manhole and having a large rigidity is formed using a band-shaped member made of a resin band-shaped body and a metal reinforcing material. An object of the present invention is to provide a method for rehabilitating an existing pipe that can be smoothly remanufactured and the existing pipe can be rehabilitated efficiently.

  In the present invention, a metal reinforcing material that is continuous in the longitudinal direction is attached to a resin-made band-like body having joints formed on both side edges, or an embedded band-like member is drawn into the manhole from the ground side. , Supplied to a pipe making machine having a joining mechanism for joining the joining portions of the adjacent belt-like members, wound the belt-like member in a spiral manner, and joined the adjacent joining portions to produce a renovated pipe, A method of rehabilitating an existing pipe by arranging the pipe on an existing pipe, and by continuously plastically deforming the belt-like member to a curvature radius substantially equal to or smaller than the entrance diameter of the manhole on the ground After being drawn into the tube, the belt-shaped member is continuously plastically deformed into a radius of curvature substantially equal to or less than the radius of curvature of the rehabilitated pipe having a diameter larger than the inlet diameter of the manhole. Supply to the machine Revolve the pipe making machine around the axis of the existing pipe to make the rehabilitated pipe, press the pipe making machine, or pull the rehabilitated pipe and do not wind the rehabilitated pipe into the existing pipe It is characterized by being inserted.

  According to the present invention, a metal reinforcing material that is continuous in the longitudinal direction is attached to a resin-made strip-like body having joints formed on both side edges, or an embedded strip-like member is placed on the ground on a manhole. The radius of curvature of the rehabilitated pipe whose diameter is larger than the entrance diameter of the manhole after the plastic radius is continuously plastically deformed to the radius of curvature equal to or less than the diameter of the bore and drawn into the manhole. Are continuously plastically deformed to a radius of curvature substantially equal to or less than the radius of curvature, and supplied to the pipe making machine. And in the manhole, revolve the pipe making machine around the axis of the existing pipe to make the rehabilitation pipe, and do not press the pipe making machine or pull the rehabilitation pipe to wind the rehabilitation pipe Insert into existing pipe.

  As a result, the belt-like member having the metal reinforcing material can be easily drawn into the manhole having a small inlet diameter, and a rehabilitation pipe having a larger diameter than the manhole inlet diameter and a large rigidity can be smoothly formed. The existing pipe can be rehabilitated efficiently.

  In the present invention, it is preferable to connect the striated body to the head of the renovated pipe that has been piped and pull the rehabilitated pipe into the existing pipe. As a result, even if the existing pipe is bent or the like, the rehabilitated pipe can be reliably inserted into the existing pipe while being manufactured.

  In the present invention, a metal reinforcing material that is continuous in the longitudinal direction is attached to a resin-made band-like body having joints formed on both side edges, or an embedded band-like member is drawn into the manhole from the ground side. , Supplied to a pipe making machine having a joining mechanism for joining the joining portions of the adjacent belt-like members, wound the belt-like member in a spiral manner, and joined the adjacent joining portions to produce a renovated pipe, A method of rehabilitating an existing pipe by arranging the pipe on an existing pipe, and by continuously plastically deforming the belt-like member to a curvature radius substantially equal to or smaller than the entrance diameter of the manhole on the ground After being drawn in, in the manhole or in the existing pipe, the belt-like member is continuous with a radius of curvature approximately equal to or less than the radius of curvature of the rehabilitation pipe having a diameter larger than the inlet diameter of the manhole. Plastically deformed Supplied to the pipe making machine, revolves the pipe making machine around the axis of the existing pipe in the existing pipe, pipes the renovated pipe, leaves the renovated pipe left in the existing pipe, and pipes the renovated pipe A new belt-like member is supplied in front of the pipe, and the pipe is manufactured while the rehabilitation pipe is added.

According to the present invention, a metal reinforcing material that is continuous in the longitudinal direction is attached to a resin-made strip-like body having joints formed on both side edges, or an embedded strip-like member is placed on the ground on a manhole. After continuously plastically deforming to a radius of curvature equal to or less than the diameter of the aperture and drawing it into the manhole, the strip-shaped member is larger than the entrance diameter of the manhole in the manhole or in the existing pipe. The plastic pipe is continuously plastically deformed into a radius of curvature substantially equal to or less than the radius of curvature of the rehabilitated pipe having a diameter, and is supplied to the pipe making machine. Then, in the existing pipe, the pipe making machine is revolved around the axis of the existing pipe to make a rehabilitated pipe, the regenerated pipe is left in the existing pipe, and a new pipe is newly placed in front of the regenerated pipe. As a result, the belt-shaped member having the metal reinforcing material can be easily drawn into the manhole having a small inlet diameter, and more than the inlet diameter of the manhole. A rehabilitation pipe having a large diameter and a large rigidity can be smoothly produced, and an existing pipe can be rehabilitated efficiently.

  According to the present invention, by using a strip member made of a resin strip and a metal reinforcing member, a rehabilitation pipe having a diameter larger than the inlet diameter of the manhole and having a large rigidity can be smoothly piped to make the existing pipe efficient. Can rehabilitate well.

It is the schematic which shows one Embodiment of the rehabilitation method of the existing pipe | tube of this invention, and demonstrates the process of installing a pipe making machine in a manhole and making a pipe. It is a front view which shows the pipe making machine which comprises the pipe making apparatus used for the rehabilitation method of the existing pipe of FIG. It is a front view which shows the 1st curvature radius conversion apparatus which comprises the pipe making apparatus used for the rehabilitation method of the existing pipe | tube of FIG. It is a side view of the 1st curvature radius converter of FIG. It is a front view which shows the 2nd curvature radius conversion apparatus which comprises the pipe making apparatus used for the rehabilitation method of the existing pipe | tube of FIG. It is the schematic explaining the curvature-radius conversion process of the strip | belt-shaped member by the 2nd curvature-radius conversion apparatus of FIG. It is the schematic which shows other embodiment of the rehabilitation method of the existing pipe | tube of this invention, and demonstrates the process of installing a pipe making machine in an existing pipe | tube and producing a pipe. It is sectional drawing which shows an example of the strip | belt-shaped member used for the rehabilitation method of the existing pipe | tube of this invention in a joining process. It is sectional drawing and the principal part perspective view which show the other example of a strip | belt-shaped member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, prior to describing the method for rehabilitating an existing pipe according to the present invention, a pipe making apparatus for producing a rehabilitated pipe from the belt-like member 100 will be described.

  The pipe making apparatus 1 includes a pipe making machine 2 disposed in one manhole M1 communicating with an existing pipe K to be rehabilitated, and a first radius of curvature conversion installed near the drum D on the ground on the one manhole M1 side. The main part is comprised from the apparatus 3 and the 2nd curvature radius converter 4 installed in the front | former stage of the pipe making machine 2 in the manhole M1.

  As shown in FIG. 2, the pipe making machine 2 has a required width and has a substantially annular shape, and has a mounting frame 21 that retains rigidity, an outer periphery of the mounting frame 21, and a circumferential direction. A plurality of guide rollers 22 that are pivotally supported at a predetermined pitch and are in contact with the inner surface of the rehabilitated pipe S, and a newly supplied joint portion of the regenerated pipe S that is provided via the mounting frame 21 And a joining mechanism 23 having an outer surface roller 24 and an inner surface roller 25 that are rotatably supported at a joining portion with the joining portion of the belt-like member 100 to be sandwiched.

  Here, the outer surface roller 24 rotates between the reinforcing ribs 112 and 112 adjacent to the belt-shaped member 100 on the outer surface thereof, in contact with the back surface thereof, that is, the surface on the side that becomes the outer peripheral surface of the renovated pipe S. At this time, the outer peripheral surface of the outer roller 24 is knurled so that the belt-like member 100 can be fed out without slipping. Further, the inner surface roller 25 is formed in a cylindrical shape by a relatively hard material such as iron or plastic, and the outer peripheral surface thereof is a flat inner surface of the band-shaped member 100, that is, the inner peripheral surface of the renovated pipe S. Rotates in contact with the surface.

  The pipe making machine 2 revolves around the axis of the existing pipe K in the manhole M1, thereby winding the supplied belt-like member 100 in a spiral shape, and opposing joint portions of the belt-like members 100, 100 adjacent to each other. The rehabilitation pipe S is manufactured by joining 113 and 115, and the rehabilitation pipe S is left in the manhole M1.

  The joining mechanism 23 is not limited to the embodiment shown in FIG. 2, and does not include the outer roller 24, but includes an inner roller 25 and a push roller (not shown) that is attached to the attachment frame 21 and feeds the belt-shaped member 100. May be provided.

  As shown in FIGS. 3 and 4, the first curvature radius conversion device 3 includes a steel plate guide 31 formed in a spiral shape with a set curvature radius, and a first feed arranged on the upstream side of the guide 31. The roller 32 and the second feed roller 33 arranged on the downstream side of the guide 31 are rotatably provided on the support frame 34. Specifically, a ring-shaped rotary frame 36 is rotatably supported on the support frame 34 via a plurality of support rollers 35, and the first feed roller 32 and the rotation frame 36 are attached to the rotary frame 36 via a mounting bracket 37. A second feed roller 33 is provided, and a guide 31 is provided over the first feed roller 32 and the second feed roller 33, and a drive roller 38 and a drive motor 39 provided on the support frame 34 are provided. The rotating frame 36 can be driven to rotate.

  The guide 31 is a spiral plate that has a radius of curvature substantially equal to the entrance diameter of the manhole M and is formed in a substantially semicircular cross section. By being along the inner peripheral surface, the belt-shaped member 100 is plastically deformed into a spiral shape having a curvature radius corresponding to the curvature radius of the guide 31. That is, the reinforcing member 120 of the belt-like member 100 is plastically deformed to a curvature radius corresponding to the curvature radius of the guide 31.

  In this case, the curvature radius of the guide 31 may be a curvature radius equal to or less than the entrance diameter of the manhole M.

  The first feed roller 32 rotates the first pinch roller 321 in which the first inner roller 322 and the first outer roller 323 are combined, and the gear of the gear box 324 fixed to the mounting bracket 37 and the first pinch roller 321. The first hydraulic motor 325 to be driven, and the rotation shaft of the first inner surface roller 322 and the rotation shaft of the first outer surface roller 323 lead to supply the belt-like member 100 so as to supply the belt-like member 100 in a spiral shape. Arranged so that the axial direction is orthogonal to the corners, the output shaft of the first hydraulic motor 325 is rotatably supported by the gear box 324. Then, by rotating the first hydraulic motor 325, the first inner roller is connected to the output shaft, the rotation shaft of the first inner roller 322, and the rotation shaft of the first outer roller 323 via gears that are meshed with each other. The belt-like member 100 is sandwiched between the first inner surface roller 322 and the first outer surface roller 323 and is sent out so as to be pushed toward the guide 31.

  Here, the first inner surface roller 322 has a width substantially equivalent to the width of the band-shaped member 100 and is formed into a cylindrical shape by a relatively hard material such as iron or plastic, and the outer peripheral surface thereof is flat. It is positioned so as to rotate in contact with the inner surface, that is, the inner peripheral surface of the renovated pipe S.

  Further, the first outer surface roller 323 rotates so that its outer peripheral surface is in contact with the back surface thereof, that is, the outer peripheral surface of the renovated pipe S, between the adjacent reinforcing ribs 112, 112 of the strip member 100. It is positioned.

  Note that the outer peripheral surface of the first outer roller 323 is knurled so that the belt-like member 100 is fed out without slipping.

  The second feed roller 33 has the same structure as the first feed roller 32 and is disposed downstream of the guide 31. The second feed roller 33 is a second pinch in which the second inner roller 332 and the second outer roller 333 are combined. The roller 331 is composed of a gear 334 of a gear box fixed to the mounting bracket 37 and a second hydraulic motor 335 for rotating the second pinch roller 331, and the rotation shaft of the second inner roller 332 and the rotation of the second outer roller 333. The shaft is arranged so that the belt member 100 is wound in a spiral shape and supplied so that the axial direction is perpendicular to the lead angle to be supplied, and the gear box 334 together with the output shaft of the second hydraulic motor 335. Is rotatably supported by the shaft. Then, by rotating the second hydraulic motor 335, the second inner surface roller is connected to the output shaft, the second inner surface roller 332, and the second outer surface roller 333 through the gears fixed to and meshing with each other. 332 and the second outer surface roller 333 are rotated in directions opposite to each other, and the belt-like member 100 is sandwiched between the second inner surface roller 332 and the second outer surface roller 333 and is sent out so as to be pulled out from the guide 31.

  Here, the second inner roller 332 has the same configuration as the first inner roller 322, and the second outer roller 333 has the same configuration as the first outer roller 323, and the outer peripheral surface of the second inner roller 332 is the inner surface of the rehabilitation pipe S. The outer peripheral surface of the second outer roller 333 rotates in contact with the outer peripheral surface of the rehabilitating pipe S and rotates in contact with the peripheral surface.

  Therefore, the belt-like member 100 that moves along the guide 31 by pushing the belt-like member 100 into the guide 31 via the first feed roller 32 or pulling the belt-like member 100 from the guide 31 via the second feed roller 33. Can be plastically deformed into an arcuate spiral having a radius of curvature of the guide 31, that is, a radius of curvature substantially equal to the entrance diameter of the manhole M.

  Further, in the first radius-of-curvature conversion device 3, when the drive motor 39 is rotationally driven, the drive roller 38 is rotationally driven, and the rotary frame 36 is supported by the support roller 35 and is in a direction opposite to the rotational direction of the drive roller 38. Rotate. As a result, the guide 31, the first feed roller 32, and the second feed roller 33 provided on the rotary frame 36 via the mounting bracket 37 also rotate in the same direction. In this case, by rotating the rotating frame 36 in a direction opposite to the supply direction of the belt-like member 100 and at the same speed as the supply speed, the rotating frame 36 is left without being wound by the revolving pipe making machine 2. Relative excess and deficiency in the delivery of the spiral strip member 100 to the rehabilitated tube S to be piped is eliminated, and twisting of the strip member 100 can be prevented.

  That is, when the renovated pipe S is produced by the pipe making machine 2, the regenerated pipe S that is left without being wound due to the rotation frame 36 not rotating or being rotated too slowly is produced. On the other hand, the spiral belt-like member 100 is excessively fed out, and the belt-like member 100 is twisted and turned over, or conversely, the rotating frame 36 is rotated too early, so that it remains without being wound. It is possible to prevent the spiral strip member 100 from being fed out of the rehabilitated tube S to be piped, so that the radius of curvature of the spiral strip member 100 is gradually reduced and deformed.

  Here, when the belt-shaped member 100 is pulled out from the inner peripheral side of the drum D, the feeding direction (spiral direction) of the belt-shaped member 100 differs depending on the rotation direction associated with the arrangement of the drum D. Guided to one feed roller. Therefore, the feed roller on the inlet side from which the belt-like member 100 is guided becomes the first feed roller. In other words, in the embodiment, the belt-like member 100 is guided to the feed roller on the right side of FIG. 3 to form the feed roller on the inlet side, that is, the first feed roller 32.

  In the first curvature radius converting device 3 as described above, if one is constituted by a feed roller, that is, a pinch roller and a hydraulic motor that drives the pinch roller, the other can be handled by a pinch roller. That is, when the first pinch roller 321 is rotationally driven via the hydraulic motor 325 and the gear, the belt-like member 100 is sandwiched between the first pinch roller 321 and pushed into the guide 31, and the second pinch roller 331 is pushed into the hydraulic motor 335. In the case of rotational driving via a gear, the belt-like member 100 is sandwiched between the second pinch rollers 331 and is taken out from the guide 31. Thus, after being pushed into the guide 31 by the first pinch roller 321 and the hydraulic motor 325, the second pinch roller is pulled out from the second pinch roller 331 or through the first pinch roller 321 and the guide 31. The belt-like member 100 taken up by the hydraulic motor 335 and the belt 331 is continuously plastically deformed into a spiral shape having a radius of curvature of the guide 31, that is, a radius of curvature substantially equal to the inlet diameter of the manhole M.

  The hydraulic piping to the hydraulic motors 325 and 335 of the first curvature radius converter 3 is connected via a swivel joint via the hollow cylindrical portion of the drum D. Thereby, the entanglement of the hydraulic piping due to the rotation of the rotating frame 36 can be prevented. Although an electric motor can be used instead of the hydraulic motor, in this case as well, the drum D is connected via a swivel joint after passing through the hollow cylindrical portion in order to prevent the feeding cable from being entangled. On the other hand, if a motor with a built-in battery or a hydraulic motor with a power unit is adopted, it is possible to prevent tangling of wiring and piping.

  The belt-like member 100 can be easily drawn into the manhole M by plastically deforming the belt-like member 100 to a curvature radius set in advance by the first curvature radius conversion device 3.

  On the other hand, as shown in FIG. 5, the second radius-of-curvature conversion device 4 includes a feed roller 41 and first and second forming rollers 42 and 43 arranged on the downstream side of the feed roller 41 as main parts. The frame 44 is rotatably provided. Specifically, a ring-shaped rotary frame 46 is rotatably supported on the support frame 44 via a plurality of support rollers 45, and a feed roller 41 is provided on the rotary frame 46 via a mounting bracket 47. At the same time, the forming rollers 42 and 43 are provided so that their rotational positions can be adjusted, and the rotating frame 46 can be driven to rotate via a driving roller 48 and a driving motor 49 provided on the support frame 44.

  The feed roller 41 includes a pinch roller 411 in which an inner roller 412 and an outer roller 413 are combined, a gear box fixed to the mounting bracket 47, and a hydraulic motor (not shown) that rotates the pinch roller 411. The rotation axis of the roller 412 and the rotation axis of the outer surface roller 413 are arranged so that the axial direction is orthogonal to the lead angle to which the band-shaped member 100 is to be supplied, so that the band-shaped member 100 is spirally supplied. Along with the output shaft of the hydraulic motor, each is rotatably supported by a gear box. Then, by rotating the hydraulic motor, the inner roller 412 and the outer roller 413 are reversely connected to each other via gears fixed to the output shaft, the rotating shaft of the inner roller 412 and the rotating shaft of the outer roller 413 and meshing with each other. The belt-shaped member 100 is sandwiched between the inner surface roller 412 and the outer surface roller 413 and is sent out toward the forming rollers 42 and 43.

  The first forming roller 42 of the second curvature radius converting device 4 is rotatably supported by a guide member 461 fixed to the rotating frame 46 and a moving frame 462 movably provided on the guide member 461. The frame 462 can be fixed to the guide member 461 through a fixing bolt (not shown) at an arbitrary movement position. The second forming roller 43 includes a first guide member 471 movably provided on the mounting bracket 47, a second guide member 472 provided orthogonal to the first guide member 471, and the second guide member 472. The movable frame 473 is rotatably supported by the movable frame 473, and the movable frame 473 is optional with respect to the 21st guide member 472, and the first guide member 471 is optional with respect to the mounting bracket 47. Can be fixed via a fixing bolt (not shown) at the moving position.

  Here, the rotation axis of the first forming roller 42 and the rotation axis of the second forming roller 43 have an axial direction with respect to a lead angle to which the band-shaped member 100 is to be supplied so that the band-shaped member 100 is spirally supplied. It arrange | positions so that it may orthogonally cross and each is supported rotatably.

  Therefore, the rotation positions of the forming rollers 42 and 43 with respect to the feed roller 41 fixed to the rotating frame 46 can be adjusted, and the forming rollers 42 and 43 can set the radius of curvature of the belt-like member 100 fed through the feed roller 41. It can be converted to any radius of curvature. Specifically, in FIGS. 5 and 6, when the orthogonal coordinate axes X and Y with the rotation center of the rotating frame 46 as the origin are assumed, the contact points of the outer roller 413 and the inner roller 412 in the feed roller 41 are at the set coordinate position. While fixed, the x-coordinate of the rotation center of the first forming roller 42 and the x-coordinate and y-coordinate of the rotation center of the second forming roller 43 are variable. Therefore, when the rotating frame 46 rotates, the rotation radius of the first forming roller 42 and the rotation radius of the second forming roller 43 can be adjusted.

  As a result, the radius of curvature of the belt-like member 100 pulled out from the feed roller 41 and wound around the second forming roller 43 is adjusted and adjusted by the first forming roller 42. That is, by fixing the contact positions of the first forming roller 42 and the second forming roller 43 with respect to the band-shaped member 100 at a preset position, the band-shaped member 100 is substantially equal to or smaller than the inlet diameter of the manhole M. The inner surface of the second forming roller 43 is wound around the outer surface of the second forming roller 43 after being plastically deformed to the radius of curvature and supplied to the feed roller 41 and pulled out via a hydraulic motor (not shown). Is pressed by the first forming roller 42, and the radius of curvature of the belt-like member 100 is larger than the small radius of curvature corresponding to the inlet diameter of the manhole. It can be plastically deformed into a spiral of radius.

  In this case, in the second radius-of-curvature conversion device 4, the supply speed of the belt-like member 100 is controlled so that the pipe making speed of the renovated pipe S by the pipe making machine 2 is not excessive or insufficient. That is, in the first radius-of-curvature conversion device 3 and the second radius-of-curvature conversion device 4, the supply speed of the belt-like member 100 is tuned and controlled according to the pipe making speed of the renovated pipe S.

  Further, the hydraulic piping to the hydraulic motor of the feeding device 41 of the second curvature radius conversion device 4 passes the inside of the spiral belt-like member 100 delivered from the first curvature radius conversion device 3 and passes through the swivel joint. Connected. Thereby, the entanglement of the hydraulic piping due to the rotation of the rotating frame 46 can be prevented.

  Next, a construction procedure for rehabilitating the existing pipe K using the pipe making apparatus 1 configured as described above will be described.

  The existing pipe K to be constructed is provided with a manhole for each predetermined span, and the other manhole communicated with the other end from one manhole communicated with one end of the construction target region (hereinafter referred to as a starting side manhole M1). It is assumed that the rehabilitation pipe S is formed on the existing pipe K and laid and rehabilitated (hereinafter referred to as the reaching side manhole M2).

  As a preparatory work for the rehabilitation work, first, the lump attached to the existing pipe K, the protruding part of the attachment pipe, and the like are removed, and temporary stoppage of the intrusion water is performed. Further, when the pipe making machine 2 is revolved, an operation of hanging the inside of the start side manhole M1 is also performed so that the joining mechanism 23 does not come into contact.

  On the ground on the start side manhole M1 side, a drum D (with a turntable) in which a belt-like member 100 is wound in a hollow cylindrical shape is disposed, and a first curvature radius converter 3 is installed in the vicinity of the drum D. Further, a power unit including a generator and a hydraulic unit (not shown) is installed. In addition, the second radius-of-curvature conversion device 4 is disassembled and loaded into the start side manhole M1, assembled and installed, while the pipe making machine 2 is loaded into the start side manhole M1 using a crane or the like, The hydraulic piping from the unit is connected to the hydraulic motors 325, 335, 39 of the first curvature radius converter 3 and the hydraulic motor that drives the joining mechanism 23 in the pipe making machine 2.

  On the other hand, as will be described later, a winch 5 for towing the rehabilitation pipe S into the existing pipe K is installed on the ground on the arrival side manhole M2 side, such as a wire or rope wound around the winch drum. The striated body 51 is drawn to the start side manhole M1 side by using a wire rod inserted from the start side manhole M1 to the arrival side manhole M2.

  When the preparatory work is completed, the belt-like member 100 is pulled out from the inner peripheral side while rotating the drum D around the axis, and the first feed roller 32, the guide 31 and the second feed roller of the first curvature radius conversion device 3 are pulled out. After plastic deformation to the radius of curvature set through 33, the belt-shaped member 100 plastically deformed is drawn into the start-side manhole M1. Next, in the start side manhole M1, the curvature radius set through the feed roller 41 of the second curvature radius converting device 4 and the forming rollers 42 and 43 fixed in advance at the leading end of the band-shaped member 100, that is, pipe manufacturing. After plastically deforming to a radius of curvature substantially equal to the outer diameter of the rehabilitated pipe S, the strip-shaped member 100 plastically deformed is introduced into the joining mechanism 23 of the pipe making machine 2. Next, the hydraulic piping from the power unit passes through the inside of the spiral belt-shaped member 100 supplied from the first curvature radius conversion device 3 and is connected to the hydraulic motor of the second curvature radius conversion device 4.

  Then, in the starting side manhole M1, in a state where the pipe making machine 2 is lifted using a crane or the like, the belt-like member 100 is sent out by rotating the joining mechanism 23 in the normal direction, and after being wound several times, the pipe is piped. In order to adjust the pipe diameter of the rehabilitated pipe S, the belt-like member 100 is squeezed and held by the guide roller 22 so that the inner diameter corresponding to the outer periphery of the mounting frame 21 of the pipe making machine 2, that is, the inner diameter of the existing pipe K is larger. Slightly smaller diameter. Next, the belt-like member 100 is further wound around the mounting frame 21 of the pipe making machine 2 several times, and the renovated pipe S having a slightly smaller diameter than the inner diameter of the existing pipe K is produced.

  Further, the leading end of the striated body 51 drawn into the start-side manhole M1 is fixed to the top portion of the rehabilitation pipe S or the inner peripheral surface of the top portion. At this time, it is preferable to provide a tip cap (not shown) whose outer surface on the tip side is formed into a curved surface such as a spherical surface, a conical surface, or a truncated cone surface at the distal end of the rehabilitation pipe S. By providing such a tip cap, when the rehabilitating pipe S is pulled by the winch 5, even if the existing pipe K has a step or the like, the outer surface on the tip side of the tip cap can get over the step or the like of the existing pipe K. The rehabilitation pipe S can be pulled smoothly.

  Next, after the tip of the short rehabilitation pipe S is suspended from the existing pipe opening in the start side manhole M1, the joining mechanism 23 of the pipe making machine 2 is rotated forward in the start side manhole M1, and the first and second The curvature radius converters 3 and 4 are driven. As a result, the joining mechanism 23 of the pipe making machine 2 allows the shaft center (rehabilitated pipe) of the existing pipe K in the opposite direction to the relative feeding direction of the strip member 100 with respect to the short rehabilitated pipe S supported by the existing pipe K. Rotate (revolve) around the axis of S) to produce rehabilitation pipe S. In this case, the direction in which the pipe making machine 2 pipes the rehabilitated pipe S (will proceed) is opposite to the existing pipe K to be rehabilitated.

  The winch 5 is driven at the same time as this pipe making operation, and the rehabilitated pipe S is pulled into the existing pipe K by the cable body 51 at a speed almost equal to the pipe making speed of the rehabilitated pipe S. As a result, in the state where the pipe making machine 2 does not remove the rehabilitated pipe S and does not move from the fixed position in the start-side manhole M1, the regenerated pipe S which has been piped is not wound around the existing pipe K. (See FIG. 1).

  Moreover, the reinforcing member 120 of the belt-like member 100 is drawn into the manhole M1 while being plastically deformed to have a curvature radius substantially equal to or less than the inlet diameter of the manhole M by the first radius-of-curvature conversion device 3, so Can be drawn into. Further, since the second radius-of-curvature conversion device 4 is plastically deformed into a radius of curvature corresponding to the trajectory of the joining mechanism 23 of the pipe-making machine 2 revolved by the second radius-of-curvature conversion device 4 and supplied to the pipe-making machine 2, The pipe S can be smoothly produced, and a restoring force for releasing the joined portion of the joined belt-like member 100 is not generated, and the pipe making operation can be performed continuously.

  It should be noted that “in the start side manhole M1”, which is a place where the pipe making machine 2 produces the rehabilitated pipe S, refers to the case where the entire pipe making machine 2 is disposed in the manhole M1, The case where it is arranged over both the existing pipe K and the manhole M1 is also included.

  Then, the rehabilitation pipe S is further piped from the state shown in FIG. 1 and inserted into the existing pipe K. When reaching the reaching side manhole M2, the belt-like member 100 is cut at the front side of the pipe making machine 2, After removing the pipe making machine 2 from the rehabilitated pipe S by performing the end treatment, and after removing the striated body 51 from the rehabilitated pipe S, the existing pipe K and both ends of the rehabilitated pipe S are not shown in detail. A seal member is disposed in the gap and sealed so that sewage or the like does not enter the gap, and a backfill material is injected into the gap between the existing pipe K and the renovated pipe S through the seal member. Next, when the backfill material is solidified, the projecting portion of the rehabilitation pipe S into the manholes M1 and M2 is cut off to complete the operation.

  In the above-described embodiment, the case where the rehabilitation pipe S is pulled by the cable body 51 using the winch 5 and is inserted into the existing pipe K is exemplified. A device for pressing the pipe making machine 2 in the direction of the existing pipe K to be rehabilitated may be installed. Thereby, while the pipe making machine 2 revolves and forms the renovated pipe S, the pipe making machine 2 does not move the fixed position in the manhole M1 by pressing the pipe making machine 2 into the existing pipe K. In addition, only the formed rehabilitation pipe S can be inserted into the existing pipe K.

  By the way, in embodiment mentioned above, the pipe making machine 2 is revolved around the axial center of the existing pipe K in the manhole M, the renovated pipe S is produced, and the produced renovated pipe S is connected via the winch 5. An example of a method for rehabilitating an existing pipe that is towed and inserted into the existing pipe K is illustrated in FIG. 7 using a pipe making machine 2 in which a joining mechanism 23 having an outer surface roller 24 and an inner surface roller 25 is provided on the mounting frame 21. As shown, when the pipe making machine 2 revolves around its axis in the existing pipe K and moves in the axial direction, the joining mechanism 23 joins the belt-like member 100 to form the renovated pipe S. It can also be applied to an existing pipe rehabilitation method in which the piped rehabilitation pipe S is left in the existing pipe K. In this case, the second radius-of-curvature conversion device 4 may be installed in the existing pipe K or the renovated pipe S formed in the existing pipe K, in addition to being installed in the starting side manhole M1.

  On the other hand, the belt-like body of the belt-like member 100 is not limited to the one shown in FIG. For example, as shown in FIG. 9, the belt-like member 100A is composed of a combination of a resin belt-like body 130 on which a metal reinforcing member 120 is mounted and a fitting material 140, and the adjacent belt-like bodies 130, 130 are fitted. What is joined via the compound material 140 may be used.

  The band-shaped body 130 has a plurality of T-shaped reinforcing ribs 132 on the back surface of the band-plate-shaped substrate 131, and joint recesses 133 and 133 are formed at both ends thereof. Further, the fitting member 140 has joint convex portions 141 and 141 that fit into the joint concave portions 133 and 133 of the belt-like body 130. And at the time of pipe making, the strip | belt-shaped body 130,130 with which the reinforcement material 120 was mounted | worn adjacent to each other was wound spirally, and the front strip | belt-shaped body in the state which faced the front-end edge part and the rear-end edge part. Reinforcing materials that are adjacent to each other by fitting and fitting the fitting material 140 from the inner peripheral side of the belt-like body 130 across the rear edge edge-side joining concave portion 130 of the belt 130 and the front edge edge-side joining concave portion 133 of the belt-like body 130 that follows. A rehabilitation pipe can be manufactured by connecting the belts 130, 130 to which 120 is attached.

  In the above-described embodiment, the belt-like members 100 and 100A in which the metal reinforcing members 120 are mounted on the resin-made belt-like bodies 110 and 130 having the joint portions formed on the both side edge portions are exemplified. It may be a band-like member in which a metal reinforcing material is embedded in a resin-like band-like body in which a joint portion is formed in the part.

  Furthermore, in joining the belt-like members, in addition to joining by fitting the joint concave portions and the joint convex portions, depending on the resin of the belt-like member, joining may be performed through a molten resin.

DESCRIPTION OF SYMBOLS 1 Pipe manufacturing apparatus 2 Pipe manufacturing machine 23 Joining mechanism 3,4 Curvature radius conversion apparatus 5 Winch 100,100A Strip member 110,130 Strip body 120 Reinforcement material K Existing pipe M1, M2 Manhole S Rehabilitation pipe

Claims (3)

  Metal reinforcing materials that are continuous in the longitudinal direction are attached to resin-made strips with joints formed on both side edges, or embedded strip-like members are drawn into the manhole from the ground side and adjacent to each other Supplied to a pipe making machine having a joining mechanism for joining the joining parts of the belt-like members, wound the belt-like member in a spiral shape, joined adjacent joints to produce a renovated pipe, and the renovated pipe is an existing pipe In this method, the existing pipe is rehabilitated, and the belt-like member is continuously plastically deformed to the curvature radius substantially equal to or smaller than the inlet diameter of the manhole on the ground and drawn into the manhole. After that, the belt-shaped member is continuously plastically deformed to a curvature radius substantially equal to or less than the curvature radius of the rehabilitation pipe having a diameter larger than the inlet diameter of the manhole in the manhole, and then supplied to the pipe making machine. , In the manhole Revolve the pipe making machine around the axis of the existing pipe to make the rehabilitated pipe, press the pipe making machine, or pull the rehabilitated pipe and insert it into the existing pipe without winding it A method for rehabilitating existing pipes.   2. A method for rehabilitating an existing pipe according to claim 1, wherein a striated body is connected to a leading portion of the renovated pipe that has been piped, and the rehabilitated pipe is pulled into the existing pipe.   Metal reinforcing materials that are continuous in the longitudinal direction are attached to resin-made strips with joints formed on both side edges, or embedded strip-like members are drawn into the manhole from the ground side and adjacent to each other Supplied to a pipe making machine having a joining mechanism for joining the joining parts of the belt-like members, wound the belt-like member in a spiral shape, joined adjacent joints to produce a renovated pipe, and the renovated pipe is an existing pipe In this method, the existing pipe is rehabilitated, and the belt-like member is continuously plastically deformed to the curvature radius substantially equal to or smaller than the inlet diameter of the manhole on the ground and drawn into the manhole. After that, in the manhole or in the existing pipe, the belt-like member is continuously plastically deformed to a curvature radius substantially equal to or less than the curvature radius of the rehabilitation pipe having a diameter larger than the inlet diameter of the manhole. Pipe making machine In the existing pipe, the pipe making machine revolves around the axis of the existing pipe to make the rehabilitated pipe, and the piped rehabilitated pipe is left in the existing pipe, and in front of the piped rehabilitated pipe A method for rehabilitating an existing pipe, characterized in that a new belt-shaped member is supplied and pipes are made while a rehabilitation pipe is added.

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