JP2009150164A - Rehabilitation assisting apparatus for existing pipe bent part, and rehabilitation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To bend and deform a rehabilitation pipe to be newly installed in an old existing pipe, according to the shape of the bent part of the existing pipe. <P>SOLUTION: In a rehabilitation assisting apparatus 1, an advancing/retreating rod 53 is extended from a main frame 51, and a support part 54 or an attaching part 55 is provided to the tip end of the rod 53 to be integrally bonded to the inner circumferential surface of the rehabilitation pipe 20. An apparatus body 5 is arranged in the pipe shaft direction of the rehabilitation pipe at a plurality of portions at intervals, and furthermore a pin-connected connection frame 6 and an expanding or contracting extension member 7 is installed between the adjacent device apparatus bodies 5, 5. Then, the extension member 7 is extended or contracted, to bring the respective attaching parts 55 of the apparatus bodies 5, 5 closer together or separate them from each other in the pipe shaft direction, causing the rehabilitation pipe 20 to be extended and deformed to follow and deform the shape of the rehabilitation pipe 20 into the bend part shape of the existing pipe 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rehabilitation assisting device and a rehabilitation method used when a rehabilitation pipe is newly installed in a curved portion of an existing pipe for rehabilitation.

  Conventionally, metal pipes and fume pipes have been used as existing pipes used as water and sewage systems and gas pipes. Such existing pipes may become obsolete due to long-term use and may leak due to cracks or corrosion. For this reason, in recent years, synthetic resin pipes have been inserted into existing pipes for lining as a method for rehabilitating existing pipes such as aged buried pipes.

  For example, as described in Patent Document 1, there is known a method of rehabilitating an existing pipe using a rehabilitation pipe formed by spirally winding a strip member (profile) made of a synthetic resin. . Here, the side edge parts of the adjacent belt-shaped members wound in a spiral form are engaged with each other to form a tubular rehabilitation pipe. Then, the backfill material is filled between the outer peripheral surface of the newly renovated pipe and the existing inner peripheral surface in the existing pipe in this way, and the renovated pipe and the existing pipe are integrated, and the inner peripheral surface of the existing pipe is renewed. Is done.

  In such a rehabilitation method for existing pipes, if a backfilling material is filled between the outer peripheral surface of the rehabilitated pipe and the inner peripheral surface of the existing rehabilitation pipe, the rehabilitation pipe will rise in the existing pipe due to the filling pressure of the backfilling material. In order to prevent the pipe from rising and to integrate both stably, a support device is installed in the rehabilitation pipe.

This type of support device has a frame and a support material provided on the frame, and is loaded into the rehabilitation pipe prior to the filling of the backfill material. This is to be supported (for example, see Patent Documents 2 and 3).
Japanese Patent Publication No. 3-48392 Japanese Patent No. 3377701 Japanese Patent No. 3377702

  In the existing pipe rehabilitation method as described above, when the existing pipe into which the rehabilitation pipe is inserted is not a straight pipe but is partially curved, the rehabilitation pipe is made to follow the curved shape of the existing pipe. In particular, when the curvature of the bending portion of the existing pipe is increased, there is a problem that the bending portion cannot be followed unless the width of the belt-like member is reduced. That is, the use of a strip-shaped member having a small width may cause a decrease in construction efficiency and a prolonged construction period.

  Therefore, the present invention solves the problems in the conventional existing pipe rehabilitation method, and enables the rehabilitation pipe newly installed in the aged existing pipe to be bent and deformed in accordance with the shape of the bending portion of the existing pipe. Rehabilitation auxiliary device and rehabilitation that can rehabilitate existing pipes with good workability while maintaining the curved shape of the deformed rehabilitation pipe by making the shape of the rehabilitation pipe follow the bending part well regardless of the curvature of the bending part The purpose is to provide construction methods.

  In order to achieve the above-described object, the present invention provides a rehabilitation assisting device that is installed in a rehabilitation pipe formed in an existing pipe bending portion and supports the rehabilitation pipe from the inside, and is a main frame installed in the rehabilitation pipe. And an apparatus main body that is supported by the main frame and that can be fixed to the inner peripheral surface of the rehabilitation pipe, and that is disposed at a plurality of locations at intervals in the tube axis direction of the rehabilitation pipe. Between the main bodies, both ends of the main frame are joined to each other so as to be rotatable, and a connecting frame for connecting the apparatus main bodies to each other, and a telescopic member that is installed between the apparatus main bodies and can be extended or reduced, By extending or contracting the expansion / contraction member, the attachment parts of the apparatus main body arranged at both ends thereof are separated from or close to each other in the tube axis direction, so that the rehabilitation pipe existing between the attachment parts is expanded and contracted, Curved shape of existing pipe It is to allow to follow the.

  With such a configuration, it is possible to deform and renovate a rehabilitation pipe newly installed in an aging existing pipe according to the shape of the bending section of the existing pipe with a simple operation, and it is necessary to match the curvature of the bending section. Can be bent by an amount. At this time, it is not necessary to stop the regenerator pipe making machine, and it is also possible to change the shape of the rehabilitated pipe while the pipe making operation is proceeding.

  Further, the present invention is the rehabilitation assisting device having the above-described configuration, wherein the device main body is further extended from the main frame toward the inner peripheral surface of the rehabilitation pipe, and can be advanced and retracted in the radial direction of the rehabilitation pipe. The attachment portion is provided at the distal end portion of the advancement / retraction portion disposed at least on the back side or the ventral side of the curved portion of the existing pipe among the advancement / retraction portions, and at the distal end portion of the remaining advancement / retraction portion Is characterized in that it has a support portion that is pressed against the inner peripheral surface of the rehabilitation pipe and supports the inner peripheral surface.

  As a result, the inner peripheral surface of the rehabilitation tube is extended by the attachment portion disposed in the back side direction of the bending portion, or the inner peripheral surface of the rehabilitation tube is contracted by the attachment portion disposed in the abdominal side direction. Thus, the rehabilitating pipe can be deformed following the curved shape of the existing pipe. At this time, due to the action of the connecting frame, the rehabilitating tube can be bent and deformed only by moving one of the attachment portions in the dorsal or ventral direction of the bending portion.

  Further, in the rehabilitation assisting device having the above-described configuration, the attachment portion and the support portion are provided with a detachable structure at the distal end of the advancement / retraction, and the attachment portion and the support portion can be interchanged. It is characterized by what has been done.

  This makes it possible to use the device body by installing a mounting part at the tip of the advancing / retreating when the rehabilitation tube is bent and deforming, and installing a support part at the tip in other work processes. The versatility and workability are improved.

  More specifically, according to the present invention, in the rehabilitation assisting device having the above-described configuration, the attachment portion is provided with a cylindrical portion into which the advancement / retraction can be inserted, and the attachment portion is detachable from the distal end portion of the advancement / retraction. It is preferable that it is characterized.

  Thereby, the attachment work of the attachment part can be easily performed, the replacement work with the support part can be simplified, and it can also be used for the rehabilitation pipe for rehabilitating the straight pipe part of the existing pipe.

  Further, in the rehabilitation assisting device having the above-described configuration, the rehabilitation pipe is formed by spirally winding a belt-like member having an expansion / contraction part having a concave cross section, and the attachment part is formed of the rehabilitation pipe. It has a plurality of convex portions locked to the concave expansion and contraction portions appearing on the inner peripheral surface, and can be fixed to the inner peripheral surface of the rehabilitation pipe.

  As a result, it is possible to bend and deform the rehabilitating pipe newly installed in the aging existing pipe in accordance with the shape of the bending section of the existing pipe with a simple operation, and bend only the required amount according to the curvature of the bending section. Can be made. At this time, the convex portion of the attachment portion is locked to the expansion / contraction portion of the inner peripheral surface of the rehabilitation tube to hold the rehabilitation tube. Thereby, the attachment part of each apparatus main body can mutually be spaced apart or adjoined to the pipe-axis direction by the action | operation of an expansion-contraction member, and it becomes possible to deform | transform a rehabilitation pipe | tube into a desired curved shape.

  Alternatively, according to the present invention, in the rehabilitation assisting device having the above-described configuration, the attachment portion is provided with an elastic material on an abutting surface that abuts on the inner peripheral surface of the rehabilitation tube, and can be brought into close contact with the inner peripheral surface of the rehabilitation tube. It may be.

  In this case, the rehabilitation pipe can be held regardless of the cross-sectional shape of the inner peripheral surface of the rehabilitation pipe, and the rehabilitation pipe can be deformed into a desired curved shape by the operation of the expansion and contraction member.

  According to the present invention, in the rehabilitation assisting device having the above-described configuration, the expansion and contraction member is provided with a fluid cylinder that extends. Here, a hydraulic cylinder or an air cylinder can be used as the fluid cylinder that extends.

  Alternatively, in the rehabilitation assisting device having the above configuration, the expandable member may be provided with a ball screw mechanism.

  With such an expansion / contraction member, the expansion / contraction member is expanded or contracted in the rehabilitation pipe, and the attachment parts of the respective apparatus main bodies are separated or close to each other in the tube axis direction, and the rehabilitation pipe existing between the attachment parts is deformed into a curved shape. Can be made.

  Further, the present invention provides a rehabilitation assisting device having the above-described configuration, further comprising a fixing frame that is further laid between adjacent device main bodies after the rehabilitation tube is deformed following the curved portion shape of the existing tube, It is characterized by maintaining a deformed shape.

  By installing the fixed frame in this way, the elastic member can be removed from between adjacent apparatus main bodies, and the curved shape of the rehabilitation pipe can be maintained, and the rehabilitation work can be performed while maintaining a good rehabilitation pipe shape. Can proceed.

  Further, the present invention is a rehabilitation method for an existing pipe bending part in which a rehabilitation pipe is newly installed in an existing pipe including a bending part in the pipe line to rehabilitate the pipe line in accordance with the shape of the bending part. Forming a rehabilitation pipe by spirally winding the supplied rehabilitation band-shaped member, further supplying a new band-shaped member in front of this rehabilitation pipe, and sequentially forming the rehabilitation pipe, and forming The rehabilitation assisting device is installed inside the rehabilitation tube to support the inner peripheral surface of the rehabilitation tube, and the rehabilitation assisting device pulls or compresses the rehabilitation tube in the axial direction of the tube to follow the shape of the curved portion of the existing tube. In this way, the pipe making process and the deformation process are alternately repeated for each predetermined length according to the shape of the curved portion of the existing pipe.

  By such rehabilitation method, it becomes possible to bend the rehabilitation pipe newly installed in the aging existing pipe according to the shape of the bending part of the existing pipe with a simple operation. It can be bent as much as necessary. At this time, it is not necessary to stop the regenerator pipe making machine, and it is also possible to change the shape of the rehabilitated pipe while the pipe making operation is proceeding. In such a rehabilitation method, a rehabilitation assisting device having any one of the above configurations can be used as a rehabilitation assisting device installed inside the rehabilitation pipe.

  In the rehabilitation method having the above-described configuration, the present invention is characterized in that the deformation step is performed behind a pipe line that is performing the pipe making step, and the pipe making step and the deformation step are simultaneously performed.

  As a result, the renovation pipe to be formed in the existing pipes can be deformed into the curved portion at the same time while the renovation pipe is being formed, and it is not necessary to stop the pipe making machine. It can be performed.

  According to the rehabilitation assisting device and the rehabilitation method of the existing pipe bending portion of the present invention configured as described above, the rehabilitation pipe newly installed in the aged existing pipe is bent and deformed according to the shape of the bending portion of the existing pipe. It is possible to rehabilitate the existing pipe with good workability while maintaining the deformed curved shape by making the shape of the rehabilitated pipe follow well regardless of the curvature of the curved portion.

  Hereinafter, the best mode for carrying out a rehabilitation assisting apparatus and a rehabilitation method for an existing pipe bending portion according to the present invention will be described with reference to the drawings.

  FIG. 1 shows an embodiment of the present invention and is a schematic explanatory view showing an example of a rehabilitation method for an existing pipe bending portion.

  The existing pipe 10 buried in the ground has various shapes such as a circular shape, a rectangular shape, and a horseshoe shape. In the following embodiment, an example in which the rehabilitation method of the present invention is applied to an existing pipe 10 having a circular cross-sectional shape will be described. However, the present invention is not limited to the cross-sectional shape of the existing pipe, but has a cross-sectional shape such as a rectangle or a horseshoe shape. The same can be applied to existing pipes.

  Here, before explaining the rehabilitation assisting device for the existing pipe bending portion of the present invention, the remanufacturing pipe manufacturing process in the rehabilitation of the existing pipe up to the previous stage of installing the rehabilitation assisting device will be briefly described.

  As shown in FIG. 1, the rehabilitation of the existing pipe 10 is to form a tubular rehabilitation pipe 20 in the existing pipe 10 and renew the inner peripheral surface of the aged existing pipe 10 with this new rehabilitation pipe 20. Is done by. In the illustrated existing pipe 10, the pipe line is partially curved, and the vicinity of the portion indicated by reference numeral 13 in the drawing is bent in the arrangement surface of the existing pipe 10.

  A drum 30 around which a belt-like member (profile) 2 is wound in advance is installed in an upper part of the upstream side manhole 11 of the existing pipe 10 (or in the existing pipe 10). From this upstream manhole 11, the pipe making machine 40 and the hydraulic unit 32 are carried into the existing pipe 10 and installed at the upstream end of the existing pipe 10 to be rehabilitated. The drum 30 is used to continuously supply the belt-like member 2 to a self-propelled pipe making machine 40 disposed in the existing pipe 10. The pipe making machine 40 is driven by a drive source 31 such as a generator installed in the manhole of the downstream manhole, and as will be described later, the belt-like member 2 is spirally wound to form a tubular shape. The rehabilitation tube 20 is formed.

  FIG. 2 is a cross-sectional view showing an example of a belt-like member (profile) that can be used in the rehabilitation method of the present invention, FIG. 3 is an explanatory view showing a place where the joint portion of the belt-like member is fitted, and FIG. It is explanatory drawing which shows the state by which the said strip | belt-shaped member was joined. FIG. 5 is a cross-sectional view showing another embodiment of the belt-like member, and FIG. 6 is a perspective view showing a part of the joining portion and the fitting member of the belt-like member of FIG.

  The belt-like member 2 illustrated in FIG. 2 is a member particularly suitable for use in the curved portion 13 of the existing pipe 10 and is formed into a long belt shape using a thermoplastic resin having flexibility. The band-shaped member 2 is provided with joint portions 21 at both ends in the width direction. As for the junction part 21, the protruding item | line 21a is formed in one junction part, and the recessed item | line 21b is formed in the other junction part. The ridges 21a and the ridges 21b are formed along the longitudinal direction of the belt-like member 2, and are configured to be fitted together and joined.

  Of these, the ridges 21a are formed with a support column 211 and a fitting portion 212 having a substantially circular cross section at the tip. Further, the concave strip 21b is formed to include a fitted portion 213 formed in a substantially circular cross section and a flange portion 214. In the vicinity of the ridges 21a, a band-shaped soft elastic body 215 such as an elastomer that prevents slippage and adheres to each other when the band-shaped members 2 are joined together is disposed in advance. A plurality of ribs 22... 22 are erected along the longitudinal direction at a substantially central portion in the width direction of the band-shaped member 2 to reinforce the band-shaped member 2. Each of the tip portions of the ribs 22 ... 22 is formed to be bent in a substantially L-shaped cross section.

  The belt-like member 2 is provided with a stretchable portion 23 that is bent in a mountain shape. The stretchable portion 23 is provided so that the belt-like member 2 can expand and contract in the width direction, and has a predetermined curvature or a bent portion. The cross-sectional shape of the expansion / contraction part 23 is not limited to that shown in FIG. 2, but may be a substantially W shape, or a shape having a curved or bent portion such as a curved shape, a substantially triangular shape, or a substantially rectangular shape. Any shape may be used.

  The size of the stretchable part 23 is not particularly limited, and may be appropriately selected depending on the inner diameter and bending angle of the existing pipe 10 to be rehabilitated, the material strength of the strip-like member 2, and the like. Is 30 °, the height (h) is 16 mm, the wall thickness (t) is 2.5 mm (similar to the member thickness), and the interval (w) between the joint portions 21 of the belt-like member 2 is 80 mm. A radius (R) of about 2.4 mm is appropriate. The number of the expansion / contraction portions 23 provided on the belt-like member 2 for such a bending portion may be one or plural.

  Moreover, the step part 24 is provided in the vicinity of the insertion part 213, and as shown in FIG.3, 4, the protruding item | line 21a of one strip | belt-shaped member 2 of the strip | belt-shaped members 2 and 2 adjacent by winding helically. Is inserted into the concave strip 21b of the other band-shaped member 2, and the insertion portion 213 is formed so that the thickness due to the overlap of the convex strip 21a and the concave strip 21b is equal to the thickness of the other portion.

  The belt-like member 2 is not particularly limited as long as it is a thermoplastic resin, and is made of vinyl chloride resin, polyethylene, polypropylene, polycarbonate, polyester, or a material such as so-called FRTP in which these resins are reinforced with glass fiber. Those formed integrally by extrusion molding or the like are preferable.

  As shown in FIGS. 5 and 6, the band-shaped member 2 has a band-shaped fitting member 25 that connects the band-shaped members 2 and 2 to the joint portions 21 and 21 of the adjacent band-shaped members 2 and 2. It may have a structure of fitting and joining.

  This strip-shaped member 2 also has a plurality of ribs 22... 22 standing in the longitudinal direction, and concave strips 21 b are formed as joints 21 at both immediate edges. The belt-like member 2 is also provided with a stretchable portion 23 that is bent in a mountain shape between the ribs 22. The fitting member 25 is provided with ridges 25a that fit into the ridges 21b and 21b of the joint portions 21 of both the adjacent band-like members 2 and 2. Thereby, the strip | belt-shaped member 2 becomes a structure which can be fitted over the recessed strips 21b and 21b of the junction parts 21 and 21 of the strip | belt-shaped members 2 and 2 adjacent at the time of joining, and can mutually be joined. .

  Each of the strip-shaped members 2 is spirally wound by the pipe making machine 40, and the spiral strips 21a and the concave strips 21b of the joint portion 21 of the strip-shaped member 2 adjacent to each other are fitted to each other by the winding. The rehabilitation pipe | tube 20 which is made into a pipe shape and has an outer diameter a little smaller than the internal diameter of the curved part 13 of the existing pipe | tube 10 is formed.

  The pipe making machine 40 may not be a self-propelled type as described above, but may be a pipe making machine 40 used by being fixed to the opening of the existing pipe 10. In this case, the belt-like member 2 is continuously supplied from the drum 30 around which the belt-like member 2 is wound, and the rehabilitation pipe 20 formed and led out by the pipe making machine 40 is directly introduced into the existing pipe 10 and installed. Propulsion while rotating in the tube 10. Thereby, the rehabilitation pipe | tube 20 is formed in the existing pipe | tube 10, Furthermore, the strip | belt-shaped member 2 is newly supplied ahead of the rehabilitation pipe | tube 20, and the renovation pipe | tube 20 is additionally formed in order.

  When the bent portion 13 of the existing pipe 10 is rehabilitated, it is preferable that the rehabilitated tube 20 is manufactured every predetermined length in accordance with the shape of the bent portion and the curvature thereof. For example, the belt-shaped member 2 is wound around the spiral member 15 at least 15 times by the pipe-making machine 40 as described above, and the rehabilitating pipe 20 having about 1.2 m is secured as the rehabilitating pipe 20 of the bending portion 13. Should be formed.

  Next, the rehabilitation assisting apparatus 1 installed in the rehabilitation pipe 20 disposed in the existing pipe 10 through the above-described pipe making process will be described.

  7 to 9 show an existing pipe bending portion in which the rehabilitation assisting apparatus according to the present invention is installed. FIG. 7 is a longitudinal sectional view (vertical cross section) of the bending portion of the existing pipe, and FIGS. It is a cross-sectional view (horizontal direction cross section) of the curved part of an existing pipe.

  The rehabilitation assisting apparatus 1 is installed inside a rehabilitation pipe 20 disposed on the bending portion 13 of the existing pipe 10. The rehabilitation assisting device 1 has a device body 5 and is provided with a main frame 51. In the illustrated form, the main frame 51 is an annular frame, and is disposed at a substantially central portion in the rehabilitation pipe 20 so that the center thereof coincides with the tube axis of the rehabilitation pipe 20.

  The main frame 51 is provided with an advancement / retraction rod 53 between the inner peripheral surface of the rehabilitation pipe 20 and a support portion 54 or an attachment portion 55 is provided at the tip thereof. In the illustrated form, eight advance / retreat rods 53 are radially arranged with respect to the main frame 51 so as to be able to advance and retreat in the radial direction of the rehabilitation pipe 20. Further, the advancing and retracting rods 53 are respectively disposed with coupling portions 511 provided on the main frame 51 with screwing mechanisms. That is, each advancement / retraction rod 53 has a threaded portion formed on the outer peripheral surface thereof, and is screwed into a female screw portion (not shown) provided in the coupling portion 511 of the main frame 51, and the main frame is determined by the screwing position. It corresponds to the support distance from 51 to the inner peripheral surface of the rehabilitation pipe 20.

  The attachment portion 55 at the tip of the advancement / retraction rod 53 is disposed at least on the back side or the ventral side direction of the bending portion 13 of the existing tube 10 among the eight advancement / retraction rods 53. That is, in the illustrated form, the attachment portion 55 is inscribed in both the back side (curved outer side) 10a and the abdomen side (curved inner side) 10b of the bending portion 13, and the attachment portions 55 face each other. It is provided to become. A support portion 54 is provided at the remaining tip of these advancement / retraction rods 53.

  FIG. 10 is an exploded perspective view showing an example of the apparatus main body 5 of the rehabilitation assisting apparatus 1 and showing the structure of the attachment portion 55. FIG. 11 is a partial cross-sectional view showing an example of the attachment portion 55 in a state of being disposed on the inner peripheral surface of the rehabilitated tube 20, and FIG. 12 is disposed on the inner peripheral surface of the rehabilitated tube 20. It is a fragmentary sectional view showing other forms of attachment part 55 in a state.

  As shown in the figure, the attachment portion 55 has an abutment plate 551 that is disposed perpendicular to the distal end portion of the advancement / retraction rod 53 supported by the main frame 51. The abutting plate 551 of the attachment portion 55 is provided with a cylindrical portion 552 into which the advancement / retraction rod 53 can be inserted. The cylindrical portion 552 is erected so as to be orthogonal to the contact plate 551. As a result, the attachment portion 55 is detachably attached to the distal end portion of the advancement / retraction lever 53.

  Further, a connecting plate 553 is provided on the side surface of the cylindrical portion 552 so as to be perpendicular to the contact plate 551, and a total of four connecting holes 554 are formed in the connecting plate 553, and the cylindrical portion 552. Are evenly arranged on both sides of the

  The contact plate 551 of the attachment portion 55 includes a plurality of claw portions 551a on the contact surface that contacts the inner peripheral surface of the rehabilitated tube 20. In the illustrated attachment portion 55, the claw portion 551 a of the contact plate 551 is fitted into the elastic portion 23 of the belt-like member 2 and locked when it contacts the inner peripheral surface of the rehabilitation pipe 20. Corresponding to the circumferential direction of the rehabilitation pipe 20, a plurality of them are arranged in the same direction with the same length. Further, the interval between the claw portions 551a is set in correspondence with the arrangement interval of the stretchable portions 23 of the belt-like member 2. Thereby, when the attaching part 55 is pressed on the internal peripheral surface of the rehabilitation pipe | tube 20, it is comprised so that it may adhere to the rehabilitation pipe | tube 20 integrally.

  In addition, as shown in FIG. 12, the contact surface of the contact plate 551 is provided with an elastic material 556 such as a sheet-like rubber material that can exert a gripping force with respect to the inner peripheral surface of the rehabilitation pipe 20. The contact plate 551 may be configured to be in close contact with the inner peripheral surface of the rehabilitated tube 20. In this case, regardless of the shape of the strip-shaped member 2 constituting the rehabilitated tube 20, the contact plate 551 is fixed if pressed against the inner peripheral surface of the rehabilitated tube 20, so that workability and versatility can be improved.

  Here, when the size of the attachment portion 55 is formed in a rectangular shape, the length of one side thereof is substantially equal to the width of the adjacent band-shaped members 2 joined as shown in FIGS. It is preferable that the sizes are configured to be equal and can be disposed across the joint portion 21.

  On the other hand, as shown in FIG. 7, the support portion 54 provided at the distal end portion of the advancement / retraction rod 53 is in contact with the inner peripheral surface of the rehabilitation tube 20 to support the rehabilitation tube 20 from the inside, thereby supporting the block shape. The member 541 is configured by fitting the recess of the receiving seat 542. The seat 542 is integrally attached to the distal end portion of the advancement / retraction rod 53.

  Such an apparatus main body 5 is arranged at a plurality of positions with intervals in the tube axis direction of the rehabilitation tube 20. Between the apparatus main bodies 5 arranged adjacent to each other in the rehabilitation pipe 20, a connecting frame 6 and an extendable member 7 are further installed in the pipe axis direction.

  The connecting frame 6 is connected to the central annular main frame 51 so that both ends of the connecting frame 6 are pivotably connected to each other. Thereby, the connection frame 6 maintains the distance between the centers of the main frames 51 and 51 of the adjacent apparatus main bodies 5 and 5. Further, in the illustrated embodiment, a hollow steel pipe is adopted for the connection frame 6, and connection pipes 61, 61 made of a short hollow steel pipe are joined to both ends in an orthogonal state. The connecting pipes 61 and 61 of the connecting frame 6 are respectively fitted to the bases of the advancing and retracting rods 53 that are screwed into the connecting plate part 512 on the side of the main frame 51, and are rotatable. .

  As shown in FIGS. 8 and 9, the expansion / contraction member 7 is installed between the connection plates 553 of the attachment portions 55 and 55 that are coaxial with each other between the adjacent apparatus main bodies 5 and 5. The The illustrated expandable member 7 has a structure in which a slide frame 72 is housed in a sleeve 71 and can be expanded and contracted, and a hydraulic cylinder 73 that extends and operates is connected to the sleeve 71 and the slide frame 72 to expand or contract. It has become a structure. The hydraulic cylinder 73 is driven by pressure oil supplied from the hydraulic unit 32 (see FIG. 1) via a hydraulic hose. Further, at both ends of the elastic member 7, a connecting pipe 75 made of a short hollow steel pipe is provided in an orthogonal state and is fitted into a connecting hole 554 provided in the connecting plate 553, and is arranged between the apparatus main bodies 5 and 5. It is made so that it can be set up.

  Thereby, the expansion-contraction member 7 makes the space | interval of the advancing / retreating levers 53 and 53 to which the attachment part 55 is connected between the apparatus main bodies 5 and 5 adjacent to each other in the tube axis direction. It will be a thing. That is, by extending or contracting the telescopic member 7 by the action of the hydraulic cylinder 73, the attachment portions 55 and 55 of the apparatus main bodies 5 and 5 are separated or close to each other in the tube axis direction, and these attachment portions are provided. The rehabilitation pipe 20 existing between 55 and 55 can be extended or contracted to be deformed in accordance with the curved portion shape of the existing pipe 10.

  At this time, the elastic member 7 is extended on the back side 10a of the curved portion shape, and the elastic member 7 is reduced on the abdominal side 10b. Further, it can be deformed simply by extending or contracting either the back side 10a or the abdomen side 10b of the curved portion shape. Since the connecting frame 6 disposed between the apparatus main bodies 5 and 5 keeps the distance between the centers of the central main frames 51 constant, the rehabilitation pipe 20 on the other side of the stretched side is reversed. This is for the purpose of expanding and contracting. Thereby, deformation | transformation is accept | permitted in the expansion-contraction part 23 of the strip | belt-shaped member 2 which comprises the rehabilitation pipe | tube 20, and it becomes possible to make the shape of the rehabilitation pipe | tube 20 follow the curved part shape of the existing pipe | tube 10.

  In addition, the means provided in the expansion / contraction member 7 to perform the extension operation is not limited to the hydraulic cylinder 73, and an appropriate actuator such as an air cylinder or a ball screw mechanism may be used.

  Next, the rehabilitation method of the existing pipe bending part made using the rehabilitation pipe rehabilitation assisting apparatus 1 of the present embodiment will be described.

  The rehabilitation pipe 20 is installed in the existing pipe 10 that is a sewer pipe. The rehabilitation pipe 20 is formed into a tubular shape by winding the band-shaped member 2 in a spiral shape with the pipe making machine 40 in the existing pipe 10, and the rehabilitation pipe 20 having an outer diameter slightly smaller than the inner diameter of the curved portion of the existing pipe 10 is formed. It will be done.

  In parallel with the production of the rehabilitating pipe 20, a plurality of sets of apparatus main bodies 5 including the main frame 51 and the like are arranged on the inner peripheral surface of the rehabilitating pipe 20 arranged inside the bending portion 13, and a rehabilitation assisting device 1 will be installed. As shown in FIGS. 7 to 9, a plurality of advancement / retraction rods 53 are respectively attached to the main frame 51, and a support portion 54 or an attachment portion 55 is disposed at the tip thereof. At this time, the support part 54 and the attachment part 55 are brought into contact with the inner peripheral surface of the rehabilitation pipe 20, and are further pressed by the rehabilitation pipe 20 by rotating and adjusting the advancement / retraction rod 53. The apparatus main body 5 is disposed at a plurality of locations at equal intervals with respect to the bending portion 13. In addition, the connecting frame 6 is installed between the apparatus main bodies 5 and 5, and the elastic member 7 is installed on the attachment portions 55.

  After the rehabilitation assisting device 1 is installed, the bending portion 13 performs a deformation operation for causing the shape of the rehabilitation tube 20 to follow the shape of the bending portion of the existing tube 10. As illustrated in FIG. 8, the retractable member 7 is actuated to expand on the back side 10 a of the bending portion 13 of the rehabilitation tube 20 and contract on the abdominal side 10 b to deform the rehabilitation tube 20 in a curved manner. Let By such a deformation process, the stretchable portion 23 of the belt-like member 2 is extended and bent in the width direction on the back side 10a of the bending portion shape, and is bent and deformed. Contrary to this, on the belly side 10b of the curved portion shape, the stretchable portion 23 of the belt-like member 2 is contracted, contracted in the width direction, and deformed in a curved manner. And the rehabilitation pipe | tube 20 is formed in the curved part shape according to the bending shape (curvature) of the existing pipe | tube 10. As shown in FIG. At this time, it is not necessary to stop the pipe making work and the progress of the pipe making machine 40, and the work of making the curved portion 13 follow the shape can be performed simultaneously with the pipe making work being advanced.

  At this time, for example, if the telescopic member 7 is extended so as to extend between the attachment portions 55, 55 located on the back side 10 a of the bending portion 13, the ventral side 10 b of the bending portion 13 is connected via the connecting frame 6. The space between the attachment portions 55 and 55 can be shortened to form a curved portion shape. Further, if the curvature is not sufficient, it is possible to operate the stretchable member 7 on the back side 10a or the abdominal side 10b to deform the rehabilitation tube 20 until a desired curvature is obtained.

  Further, by attaching a heating means such as a heater to the inner peripheral surface of the rehabilitation pipe 20, the belt-shaped member 2 made of a thermoplastic resin such as vinyl chloride resin, polyethylene, polypropylene, polycarbonate, or polyester is heated and deformed. You may make it easier.

  Thus, the strip-shaped member 2 supplied into the bending portion 13 of the existing pipe 10 is spirally wound to form the rehabilitated tube 20, and the strip-shaped member 2 is newly supplied in front of the regenerated tube 20 in order. The remanufacturing pipe 20 is additionally formed, and the rehabilitation assistance apparatus 1 is installed inside the rehabilitation pipe 20 to support the inner peripheral surface of the rehabilitation pipe 20, and the rehabilitation assistance apparatus 1 rehabilitates as described above. The deforming step of causing the tube 20 to follow the curved portion shape of the existing tube 10 is repeated alternately for each predetermined length according to the curved portion shape, and the curved portion 13 is renewed. Here, the deformation process is performed behind the pipe line in which the pipe making process is proceeding, and the pipe making machine 40 is configured by sequentially performing the deformation process on the renovated pipe 20 that has been piped. Both processes can proceed simultaneously without stopping.

  In addition, a fixed frame 8 for maintaining the curved portion shape is installed between the apparatus main bodies 5 and 5 in the portion of the rehabilitated tube 20 that is deformed to the curved portion shape. The fixed frame 8 is made of, for example, a hollow steel pipe, and a structure in which connecting pipes 81 made of a short hollow steel pipe are provided at both ends in an orthogonal state can be used. Then, the connecting pipes 81 at both ends of the fixed frame 8 are fitted into the connecting holes 554 provided in the connecting plate 553 of the attachment portion 55 and fixed.

  As shown in FIG. 9, the fixed frame 8 may be juxtaposed with the expandable member 7 fixed by expanding and contracting, or the fixed frame 8 may be arranged at a position deformed into a curved portion shape. The telescopic member 7 installed at the location may be removed. Thereby, while the separation distance between the apparatus main bodies 5 and 5 is maintained with being constant, the curved shape of the deformed rehabilitation pipe 20 is reliably held, and the support can be facilitated.

  When removing the expansion / contraction member 7 from between the apparatus main bodies 5 and 5, the removed expansion / contraction member 7 can be moved between the next attachment portions 55 and 55 for performing an operation of deforming into a curved portion shape. In addition, by installing the fixed frame 8 between the apparatus main bodies 5 in this way, it is possible to have an action against the repulsive force of the deformed rehabilitation pipe 20 without affecting the propulsion of the pipe making machine 40. It is also possible to proceed with pipe making work.

  The rehabilitation assisting device 1 can be used not only for follow-up deformation of the rehabilitation tube 20 with respect to the bending portion 13, but can also replace the attachment portion 55 with the support portion 54, and the application is limited to only the bending portion 13. Instead, it can be used as a support for any part of the rehabilitation pipe 20.

  After the rehabilitation pipe 20 is bent so as to follow the shape of the bending portion 13 of the existing pipe 10 as described above, the belt-shaped member 2 is continuously wound spirally in the existing pipe 10 so that the rehabilitation pipe 20 is The straight pipe rehabilitation work will also proceed through the pipe making process. Finally, a backfill material 90 is filled between the inner surface of the existing pipe 10 and the outer surface of the rehabilitated pipe 20 to integrate them. Thereby, the inner peripheral surface of the existing pipe 10 is rehabilitated by the rehabilitation pipe 20.

  In addition, although the strip | belt-shaped member 2 used in this invention demonstrated what has the expansion-contraction part 23 in the said example, it is not limited to the strip | belt-shaped member 2 of such a form, What kind of strip-shaped member is it? Also good. Further, if the belt-like member 2 has a cross-sectional shape in which the inner peripheral surface of the rehabilitation pipe 20 is formed smoothly, an elastic material 556 such as a rubber material is provided on the contact surface of the contact plate 551 of the attachment portion 55. As a result, the rehabilitation tube 20 can be easily held and deformed. Further, it is sufficient that the attachment portion 55 is disposed at least in the direction of the dorsal side 10a or the ventral side 10b in which the rehabilitation tube 20 is bent. However, the present invention is not limited to this, and is adapted to the deformed shape of the rehabilitation tube 20. Needless to say, it may be disposed at any location on the inner peripheral surface.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for rehabilitating an existing pipe well in accordance with the curved portion shape of an aging existing pipe.

It is one Embodiment of this invention, and is a schematic explanatory drawing which shows the rehabilitation method of the existing pipe to rehabilitate. It is sectional drawing which shows an example of the strip | belt-shaped member which can be used in this invention. It is explanatory drawing which shows the place which fits the junction part of the strip | belt-shaped member of FIG. It is explanatory drawing which shows the joining state of the strip | belt-shaped member of FIG. It is sectional drawing which shows the other form of the strip | belt-shaped member which can be used in this invention. It is a perspective view which shows a junction part in the strip | belt-shaped member of FIG. 5, and a part of fitting member. It is a longitudinal cross-sectional view of the existing pipe bending part which installed the rehabilitation assistance apparatus which concerns on this invention. It is a cross-sectional view of the existing pipe bending part which installed the rehabilitation assistance apparatus which concerns on this invention. It is a cross-sectional view of the existing pipe bending part which installed the rehabilitation assistance apparatus which concerns on this invention. It is an example of the apparatus main body of the rehabilitation assistance apparatus which concerns on this invention, and is an exploded perspective view which shows the structure of an attachment part. It is a fragmentary sectional view which shows an example of the attachment part of the state arrange | positioned at the inner surface of the rehabilitation pipe | tube. It is a fragmentary sectional view which shows the other form of the attachment part of the state arrange | positioned in the inner surface of the rehabilitation pipe | tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rehabilitation auxiliary | assistance apparatus 5 Main part 51 Main frame 53 Advancement / retraction heel 54 Support part 55 Attachment part 6 Connection frame 7 Telescopic member 8 Fixed frame 10 Existing pipe 20 Rehabilitation pipe

Claims (11)

A rehabilitation assisting device that is installed in a rehabilitation pipe formed in an existing pipe bending portion and supports the rehabilitation pipe from the inside,
A main frame installed inside the rehabilitating pipe, and a mounting portion supported by the main frame and fixed to the inner peripheral surface of the rehabilitating pipe. An apparatus main body arranged in
Between adjacent apparatus main bodies, both ends of the main frame are joined to each other so as to be rotatable, and a connection frame that connects the apparatus main bodies,
An expansion / contraction member that is laid between the apparatus main bodies and can be expanded or contracted,
By extending or contracting the expansion and contraction member and by separating or approaching the attachment parts of the apparatus main body arranged at both ends in the tube axis direction, the rehabilitation pipe existing between the attachment parts is expanded and deformed, A rehabilitation assisting device for an existing pipe bending portion that enables the shape of the rehabilitation pipe to follow the shape of the bending portion of the existing pipe. In the rehabilitation assistance apparatus of the existing pipe bending part of Claim 1,
The apparatus main body further includes a plurality of advancing and retracting members that extend from the main frame toward the inner peripheral surface of the rehabilitating pipe and can advance and retreat in the radial direction of the rehabilitating pipe. Among them, it is provided at the distal end of the advancement / retraction provided at least in the back or ventral direction of the curved portion of the existing pipe, and the remaining advancement / retraction advancement is pressed against the inner peripheral surface of the rehabilitation pipe. A rehabilitation assisting apparatus for an existing pipe bending portion, characterized by having a support portion for supporting an inner peripheral surface. In the rehabilitation assistance apparatus of the existing pipe bending part according to claim 2,
The attachment portion and the support portion are provided with a detachable structure at the forward / backward end portion, and the attachment portion and the support portion can be replaced. Auxiliary device. In the rehabilitation assistance apparatus of the existing pipe bending part according to claim 2 or 3,
A rehabilitation assisting device for an existing tube bending portion, wherein the attachment portion is provided with a cylindrical portion into which advancing and retreating can be inserted, and a mounting portion is detachably attached to a leading end portion of the advancing and retreating. It is the rehabilitation assistance apparatus of the existing pipe bending part as described in any one of Claims 1-4,
The rehabilitation pipe is formed by spirally winding a band-shaped member having a stretchable portion having a concave cross section,
The attachment portion has a plurality of convex portions that are engaged with a concave expansion and contraction portion that appears on the inner peripheral surface of the rehabilitated pipe, and can be fixed to the inner peripheral surface of the rehabilitated pipe. Rehabilitation assisting device for existing pipe bending part. In the rehabilitation assisting device for an existing pipe bending portion according to any one of claims 1 to 4,
The attachment portion has an abutting surface that abuts on the inner peripheral surface of the rehabilitation pipe, and an elastic material is provided on the abutting surface so as to be in close contact with the inner peripheral surface of the rehabilitation pipe. Rehabilitation assisting device for existing pipe bending parts. In the rehabilitation assistance apparatus of the existing pipe bending part as described in any one of Claims 1-6,
A rehabilitation assisting device for an existing tube bending portion, wherein the expansion member is provided with a fluid cylinder that extends. In the rehabilitation assistance apparatus of the existing pipe bending part as described in any one of Claims 1-6,
A rehabilitation assisting device for an existing tube bending portion, wherein the expansion member is provided with a ball screw mechanism. In the rehabilitation assistance apparatus of the existing pipe bending part according to any one of claims 1 to 8,
The deformed pipe is provided with a fixed frame that is further installed between adjacent apparatus main bodies after the deformed pipe is deformed following the curved portion of the existing pipe, and the deformed pipe is held in a deformed shape. Department of rehabilitation assistance device. A rehabilitation method for an existing pipe bending part in which a rehabilitation pipe is newly installed in an existing pipe including a bending part in the pipe line to rehabilitate the pipe line in accordance with the shape of the bending part,
A rehabilitation pipe is formed by spirally winding a rehabilitation band member supplied in the curved portion of the existing pipe, and a rehabilitation pipe is additionally formed in order by supplying a new band member in front of the rehabilitation pipe. Pipe making process;
A rehabilitation auxiliary device is installed inside the formed rehabilitation pipe to support the inner peripheral surface of the rehabilitation pipe, and the rehabilitation auxiliary device pulls or compresses the rehabilitation pipe in the direction of the tube axis to follow the shape of the curved portion of the existing pipe. And a deforming step of bending and deforming the rehabilitation tube,
A rehabilitation method for an existing pipe bending portion, wherein the pipe making step and the deformation step are alternately repeated for each predetermined length according to the shape of the bending portion of the existing pipe. A rehabilitation method for an existing pipe bending portion according to claim 10,
The said deformation process is performed behind the pipe line which is performing the pipe making process, The pipe making process and the deformation process are advanced simultaneously, The rehabilitation method of the existing pipe bending part characterized by the above-mentioned.

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