JP2011158087A - Lining method, regenerated conduit, and regeneration member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lining method with excellent workability, capable of reducing the time for forming a lining pipe and further facilitating the carrying and handling of a lining material. <P>SOLUTION: In the lining method for regenerating a dilapidated existing pipe 100, a coil body 12 is reduced in diameter by giving to the coil body 12 a rotational force in its winding direction. The diameter-reduced coil body 12 is inserted into the existing pipe 100 as it is, and a lining material 14 subjected to diameter-reduction treatment is inserted to the inside of the coil body 12. The lining material 14 is restored to a substantially circular cross-sectional shape by applying internal pressure thereto with heating, whereby a lining pipe 24 is formed. According to this, a regenerated conduit 10 is formed inside the existing pipe 100 over the whole length thereof. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lining method, a rehabilitation pipe, and a rehabilitation member, and more particularly, to a lining method, a rehabilitation pipe, and a rehabilitation member that inserts a lining pipe into an existing pipe to rehabilitate the existing pipe.

  An example of a conventional lining method is disclosed in Patent Document 1. In the technology of this Patent Document 1, a part of the liner pipe (lining pipe) in the circumferential direction is pushed inward in the radial direction, and the diameter is reduced to a substantially heart-shaped cross section. Then, with the liner pipe inserted into the existing pipe, heating steam having a predetermined pressure is supplied to the inside of the liner pipe to restore the cross-sectional shape to a substantially circular shape, thereby repairing the existing pipe.

Further, in Patent Document 2, reinforcing bars are spirally arranged in a pipe (existing pipe), a liner strip is spirally wound from above to form a liner (lining pipe), and then on the back of the liner. A lining method for filling a backfill material is disclosed.
JP 2000-343606 [B29C 63/34] JP-A-8-2777992 [F16L 55/16]

  In the technique of Patent Document 1, in order to give a flattened strength sufficient to withstand the buried earth pressure or the like to the restored liner pipe, the thickness of the pipe wall of the liner pipe must be increased. However, if the thickness of the pipe wall of the liner pipe is increased, it takes a long time for a series of construction processes such as heating the liner pipe to expand its diameter in the existing pipe and cooling it. Further, when the thickness of the liner pipe wall is increased, the weight of the liner pipe increases accordingly, which causes inconvenience in terms of transportation and handling.

  On the other hand, in the technique of Patent Document 2, since the reinforcing bar functions as a reinforcing material, it is not necessary to give the liner itself flat strength, but the operator needs to enter the pipe and arrange the wire in a spiral shape. The construction takes time and effort. In addition, this lining method has a problem that it can only cope with a pipe of a size that allows an operator to enter and work inside.

  Therefore, the main object of the present invention is to provide a novel lining method, rehabilitation pipeline, and rehabilitation member.

  Another object of the present invention is to provide a lining method, a rehabilitation pipeline, and a rehabilitation member that are excellent in workability.

  The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses, supplementary explanations, and the like indicate correspondence relationships with embodiments described later to help understanding of the present invention, and do not limit the present invention in any way.

  The first invention is a lining method for rehabilitating an existing pipe, wherein (a) a step of inserting a coil molded body into the existing pipe, (b) a step of inserting a lining material into the coil molded body, and (c) a lining. A lining method comprising a step of forming a lining pipe in an existing pipe with a material.

  In 1st invention, a coil molded object (12) is inserted in an existing pipe | tube (100) in step (a). In step (b), for example, the lining material (14) subjected to diameter reduction processing is inserted into the coil molded body. In step (c), a lining pipe (24) is formed by restoring the lining material to, for example, a substantially circular cross section. Thereby, the rehabilitation pipe line (10) is formed in the existing pipe over its entire length.

  According to the first invention, the coil molded body can have an external pressure resistance against the buried earth pressure, and the thickness of the tube wall of the lining material can be reduced, so that the time for forming the lining tube can be shortened. In addition, the lining tube can be easily transported and handled. Therefore, it is excellent in workability.

  The second invention is dependent on the first invention, and in step (a), a coil molded body whose diameter is reduced to be smaller than the existing pipe is inserted into the existing pipe, and before step (b). Then, the coil molded body is restored from the reduced diameter state.

  In 2nd invention, the coil molded object (12) diameter-reduced so that it may become a diameter smaller than an existing pipe is inserted in the existing pipe (100) in step (a). Here, a coil molded body having a diameter larger than the existing pipe (100), almost the same diameter as the existing pipe, or smaller than the existing pipe is inserted into the existing pipe so that the diameter can be easily inserted into the existing pipe. The diameter may be reduced before the operation, or may be reduced as necessary when passing through the bent pipe portion (104) or the step portion (106) of the existing pipe. And before inserting a lining material (14) in a coil molded object, it returns to the original diameter from the state which diameter-reduced the coil molded object.

  According to the second invention, the coil molded body can be easily inserted into the existing pipe.

  The third invention is dependent on the first or second invention, and in step (a), before the coil molded body is inserted into the existing pipe, a rotational force in the winding direction is applied to the coil molded body. Reduce the diameter with.

  In 3rd invention, before inserting a coil molded object (12) in the existing pipe | tube (100), the coil molded object is diameter-reduced by giving the rotational force to the winding direction to a coil molded object. .

  The fourth invention is dependent on any one of the first to third inventions, and in step (a), before the coil molded body is inserted into the existing pipe, a tensile force in the extension direction is applied to the coil molded body. To reduce the diameter.

  In 4th invention, before inserting a coil molded object (12) in the existing pipe | tube (100), the coil molded object is diameter-reduced by giving the tensile force to the extension direction to a coil molded object.

  A fifth invention is dependent on any one of the first to fourth inventions, and in step (a), the coil molded body is inserted into an existing pipe while the coil molded body is moved in its winding direction as necessary. The diameter is reduced by applying a rotational force.

  In the fifth invention, when the coil molded body (12) is inserted into the existing pipe (100) in step (a), for example, the coil molded body is inserted into the existing pipe as it is without reducing its diameter, and the coil molded body is When passing through the bent pipe part (104) or the step part (106) of the existing pipe, the coil molded body is appropriately provided with a rotational force in the winding direction as necessary. Is reduced in diameter so that it can easily pass through a bent portion or a step portion of an existing pipe.

  A sixth invention is dependent on any one of the first to fifth inventions, and in step (a), the coil molded body is inserted into an existing pipe while the coil molded body is subjected to a tensile force in the extension direction as necessary. To reduce the diameter.

  In the sixth invention, when the coil molded body (12) is inserted into the existing pipe (100) in step (a), for example, the coil molded body is inserted into the existing pipe as it is without reducing its diameter. When passing through the bent pipe part (104) or the step part (106) of the existing pipe, the coil molded body is appropriately applied with a tensile force in the extension direction as necessary. The diameter is reduced to facilitate passage through a bent portion or a stepped portion of an existing pipe.

  The seventh invention is dependent on the first or second invention, and before step (a), (d) the coil molded body whose diameter is reduced to be smaller than the existing pipe is restrained by restraining means. The step further includes the step of preparing a constrained coil formed body that is held in a state in which the diameter of the coil formed body is reduced, and in step (a), the constrained coil formed body prepared in step (d) is inserted into an existing pipe. Before the step (b), the constrained coil molded body is released from the restraint by the restraining means, so that the coil molded body is restored from the reduced diameter state.

  In the seventh invention, first, in step (d), the coil molded body (12) is reduced in diameter so as to have a smaller diameter than the existing pipe (100), and is restrained by the restraining means (26, 52, 54). Thus, a constrained coil molded body (40) is prepared in which the coil molded body is held in a reduced diameter state. Then, in step (a), the constrained coil molded body is inserted into the existing pipe. Then, before inserting the lining material (14) into the coil molded body, the coil molded body is released from the restraining means, and the coil molded body is restored from its reduced diameter to the original diameter.

  According to the seventh aspect, the coil molded body can be easily inserted into the existing pipe, and the diameter reduction work at the construction site is not required, so that workability can be improved.

  The eighth invention is dependent on the first invention, and in step (a), a coil molded body having a diameter smaller than that of the existing pipe is inserted into the existing pipe, and before step (c) or in step (c). The diameter of the coil molded body is increased.

  In the eighth invention, in step (a), the coil molded body (12) having a smaller diameter than the existing pipe is inserted into the existing pipe (100). For example, the diameter of the coil molded body is increased by applying a rotational force in the winding direction, or the diameter is increased by the internal pressure of the lining material (14).

  A ninth invention is a lining method for rehabilitating an existing pipe, and (e) the strength reinforcing body reduced in diameter so as to have a smaller diameter than the existing pipe is restrained by restraining means, thereby reducing the strength reinforcing body. A step of preparing a restraint strength reinforcing body that is held in a diameter-shaped state; (f) a step of inserting the restraint strength reinforcing body prepared in step (e) into an existing pipe; A step of restoring the strength reinforcing body from the contracted state by releasing from the restraint, (h) a step of inserting a lining material into the strength reinforcing body, and (i) a lining pipe being formed in the existing pipe by the lining material. A lining method comprising steps.

  In the ninth invention, first, in step (e), the strength reinforcing body (56) is reduced in diameter so as to have a smaller diameter than the existing pipe (100), and this is restrained by the restraining means (26, 52, 54). By restraining, a restraint strength reinforcing body (58) is prepared in which the strength reinforcing body is maintained in a reduced diameter state. Then, in step (f), the restraining strength reinforcing body is inserted into the existing pipe, and in step (g), the restraining strength reinforcing body is released from the restraining means in the existing pipe, and the strength reinforcing body is returned to the original diameter. . Then, in step (h), for example, the lining material (14) subjected to diameter reduction processing is inserted into the strength reinforcing body. In step (i), the lining material (24) is formed by restoring the lining material to, for example, a substantially circular cross section. Thereby, the rehabilitation pipe line (10) is formed in the existing pipe over its entire length.

  According to the ninth aspect, the same effect as in the seventh aspect is obtained.

  A tenth invention is a rehabilitation pipeline formed in an existing pipe by the lining method of any one of the first to ninth inventions.

  In the tenth invention, for example, the coil molded body (12) is inserted into the existing pipe (100), the lining material (14) is inserted into the coil molded body, and the lining material is, for example, substantially circular in cross section. The lining tube (24) is formed by restoring to. Thereby, the rehabilitation pipe line (10) is formed in the existing pipe.

  An eleventh invention is a rehabilitation member that is used in the lining method of any one of the first to eighth inventions and is interposed between an existing pipe and a lining material, the coil being inserted into the existing pipe A rehabilitation member provided with a molded body.

  In the eleventh invention, the rehabilitation member (12, 40) includes a coil molded body (12) inserted into the existing pipe, and when the existing pipe (100) is rehabilitated, the existing pipe and the lining material ( 14).

  According to the eleventh aspect of the invention, the thickness of the tube wall of the lining material can be reduced by interposing the coil molded body having external pressure resistance strength between the inner surface of the existing tube and the outer surface of the lining tube. The workability is improved.

  A twelfth invention is dependent on the eleventh invention, and further includes a restraining means for restraining the coil molded body to keep the coil molded body in a state of having a reduced diameter.

  In the twelfth invention, the rehabilitation member (40) includes restraining means (26, 52, 54) for restraining the coil molded body (12). The restraining means holds the coil molded body in a reduced diameter state, and in the embodiment, the restraining means reduces the diameter of the existing pipe to a smaller diameter by applying a rotational force in the winding direction. A coiled body having a diameter is accommodated.

  According to the twelfth invention, the work of reducing the diameter at the construction site is not required, so that workability is improved.

  A thirteenth invention is a rehabilitation member used in the lining method of the ninth invention and interposed between an existing pipe and a lining material, and a strength reinforcement body inserted into the existing pipe, and strength reinforcement It is a member for rehabilitation provided with a restraining means for restraining the body to keep the strength reinforcing body in a reduced diameter state.

  In the thirteenth invention, the rehabilitation member (58) includes a strength reinforcing body (56) and restraining means (26, 50, 52) for restraining the strength reinforcing body, and the existing pipe (100) is rehabilitated. Is interposed between the existing pipe and the lining material (14). The restraining means holds the strength reinforcing body in a reduced state. In the embodiment, the restraining means accommodates the strength reinforcing body whose diameter is reduced to be smaller than that of the existing pipe.

  A fourteenth invention is dependent on the twelfth or thirteenth invention, and the restraining means is a cylindrical sheet.

  In the fourteenth invention, the restraining means is a restraining member (26) in which, for example, the circumferential end portions of the synthetic resin sheet (28) are overlapped to form a cylindrical shape.

  According to the fourteenth invention, when the coil molded body is inserted into the existing pipe, since the sheet is interposed between the coil molded body and the inner surface of the existing pipe, the insertion resistance of the coil molded body can be reduced. it can. Further, since direct contact between the coil molded body and the existing pipe can be avoided by the sheet, it is possible to prevent damage to the coil molded body.

  According to the present invention, the thickness of the tube wall of the lining material can be reduced by interposing the coil molded body having external pressure resistance strength between the inner surface of the existing tube and the outer surface of the lining tube. The time for forming the tube can be shortened, and the lining tube can be easily transported and handled. Therefore, it is excellent in workability.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is sectional drawing which shows a mode that the rehabilitation pipe line was formed in the existing pipe | tube by the lining construction method of one Example of this invention. (A) is a top view which shows the coil molded object of FIG. 1, (b) is sectional drawing of the wire of the coil molded object of (a). It is an illustration figure which shows a mode that the coil molded object of FIG. 2 was inserted in the existing pipe | tube. (A) is a top view which shows a lining material, (b) is sectional drawing of the lining material of (a). It is an illustration figure which shows the state which attached the insertion tool to the front of the coil molded object. It is an illustration figure which shows a mode that the coil molded objects were connected to the axial direction by the connection tool. It is sectional drawing which shows a mode that the coil molded objects were connected to the axial direction by the connection tool. In the lining construction method of the other Example of this invention, it is an illustration figure which shows a mode that the coil molded objects were connected to the axial direction by the connection tool. It is a top view which shows the deformation | transformation Example of a coil molded object. (A) is a top view which shows the modification Example of a coil molded object, (b) is sectional drawing of the wire of the coil molded object of (a). (A) is a top view which shows the modification Example of a coil molded object, (b) is sectional drawing of the wire of the coil molded object of (a). It is an illustration figure which shows the restraint member used for the lining construction method of further another Example of this invention. It is an illustration figure which shows a mode that the restraint coil molded object which accommodated the coil molded object in the restraint member of FIG. 12 was inserted in the existing pipe | tube. It is an illustration figure which shows a mode that the restraint coil molded object was inserted in the existing pipe | tube. It is an illustration figure which shows a mode that a coil molded object is released from restraint by a restraint member. It is an illustration figure which shows a mode that the restraint coil molded object was inserted in the existing pipe | tube. It is an illustration figure which shows a mode that the position of a coil molded object is adjusted with a position adjustment apparatus. In the lining construction method of the further another Example of this invention, it is an illustration figure which shows a mode that the restraint coil molded object was inserted in the existing pipe | tube. In the lining construction method of the further another Example of this invention, it is an illustration figure which shows a mode that the restraint coil molded object was inserted in the existing pipe | tube. In the lining construction method of the further another Example of this invention, it is an illustration figure which shows a mode that the restraint coil molded object was inserted in the existing pipe | tube. It is an illustration figure which shows the restraint strength reinforcement body used for the lining construction method of the further another Example of this invention.

  In the lining method according to one embodiment of the present invention, for example, a coil molded body 12 and a lining material 14 are inserted into an aged existing pipe 100 as shown in FIG. It is for forming.

  Various uses and constituent materials of the existing pipe 100 can be applied. For example, the pipe 100 may be used for gas, water and sewage, communication cable protection, power cable protection, etc., and reinforced concrete pipes, cast iron pipes, steel pipes. In addition, it may be a pipe line composed of a synthetic resin pipe such as a vinyl chloride pipe.

  As shown in FIG. 1, in this embodiment, the existing pipe 100 includes a straight pipe portion, that is, a straight pipe portion 102, and a curved pipe portion or a bent pipe portion, that is, a bent pipe portion 104. In addition, a part of the existing pipe 100 is displaced due to ground fluctuation or the like, and a step part 106 in which a step is formed is included.

  The coil molded body 12 is made of a material having sufficient rigidity, for example, a metal such as an aluminum alloy, steel or stainless steel, a synthetic resin, and a fiber reinforced plastic such as GFRP (glass fiber reinforced plastic) or CFRP (carbon fiber reinforced plastic). In this embodiment, steel is used as the material of the coil molded body 12.

  As shown in FIG. 2, the coil molded body 12 is formed in a cylindrical shape by winding a wire 16 having a substantially circular cross section around a winding core (not shown), and the nominal diameter is the existing pipe 100. The diameter is set to be substantially equal to the inner diameter of, for example, 450 mm, and the wire diameter R is, for example, 9 mm.

  The coil molded body 12 is flexible due to its shape characteristics. Furthermore, when the coil molded body 12 is rotated in the winding (or being) direction or pulled in the extending direction, the coil molded body 12 is reduced in diameter according to the rotational force or tensile force. For this reason, as shown in FIG. 3, when inserted into the existing pipe 100, the coil molded body 12 smoothly follows the bent pipe portion 104 and the stepped portion 106 of the existing pipe 100.

  Returning to FIG. 2, the winding pitch P of the wire 16, that is, the distance between the centers of the adjacent wire 16 is set to a length substantially equal to the wire diameter R of the wire 16, for example, 9 mm. That is, in this embodiment, the coil molded body 12 is obtained by winding the wire 16 at a pitch substantially equal to the width of the wire 16 (that is, the length of the wire 16 in the axial direction of the coil molded body 12). It is formed, and the adjacent wires 16 are in close contact with each other without any gap.

  Furthermore, the axial length of the coil molded body 12 is, for example, 4-5 m. As will be described in detail later, in this embodiment, when the coil molded body 12 is inserted into the existing pipe 100, a required number of coil molded bodies 12 are connected in the axial direction according to the tube length of the existing pipe 100.

  In this embodiment, as shown in FIG. 4, the lining material 14 is a reduced diameter tube having a substantially heart shape in cross section in which a part in the circumferential direction is pushed by diameter reduction processing. This substantially U-shaped pushed portion is referred to as a pushed portion 18. The constituent material of the lining material 14 is a synthetic resin (polyethylene, polybutene, polypropylene, nylon, vinyl chloride, etc.) or a fiber reinforced plastic. Here, an example of polyethylene is shown.

  The lining material 14 is restored to a cylindrical shape by being heated to a predetermined temperature and pressurized, and forms a lining tube 24 in close contact with the inner surface of the coil molded body 12 as will be described in detail later. The lining material 14 is set so that the outer diameter when restored is substantially the same as the inner diameter of the coil molded body 12.

  Since this lining material 14 can be manufactured by a conventionally known method (Patent Document 1, etc.), detailed description of the manufacturing method is omitted. Simply put, a straight tube extruded with a predetermined diameter is heated to a predetermined temperature in the range from the softening point to the melting point (in this embodiment, for example, about 100 ° C.), The indented portion 20 is formed by reducing the diameter using a roller or the like. Therefore, by heating and pressurizing again to a temperature not lower than the softening point and not higher than the melting point, the pushing portion 20 is returned to the outer surface side and restored to a predetermined shape (cylindrical shape or the like).

  A procedure of a lining method for rehabilitating an existing pipe 100 that has deteriorated as shown in FIG. 1, for example, using such a coil molded body 12 (rehabilitation member) and the lining material 14 will be described.

  First, the insertion jig 20 is attached in front of the coil molded body 12. In this embodiment, “front” means the direction in which the coil molded body 12 is inserted, and “rear” means the opposite direction. The same applies hereinafter.

  As an example of the insertion jig 20, as shown in FIG. 5, the insertion jig 20 includes a conical main body 20 a, and a rod-like shape extending in the axial direction of the existing pipe 100 is formed at the front end of the main body 20 a. A shaft portion 20b is provided. For example, the coil molded body 12 and the insertion jig 20 can be appropriately used for locking, engaging, fitting, bolting, etc., if the rotational force applied to the insertion jig 20 is transmitted to the coil molded body 12. Can be attached by the method. Therefore, it should be noted that FIG. 5 does not accurately illustrate the coupling mechanism between the insertion jig 22 and the coil molded body 12.

  Then, the insertion jig 20 is inserted into an insertion port (not shown) that is an end opening of the existing pipe 100, and the front end of the shaft portion 20 b of the insertion jig 20 is the end opening of the existing pipe 100. It reaches to an outlet (not shown).

  Next, by applying a rotational force in the winding direction to the coil molded body 12, the diameter of the coil molded body 12 is reduced, and the coil molded body 12 is inserted into the existing pipe 100.

  Specifically, the rear end of the coil molded body 12 is fixedly held so as not to rotate on the insertion port side of the existing pipe 100, and the shaft portion 20b of the insertion jig 20 is held on the outlet side of the existing pipe 100. The coil molded body 12 is rotated in the winding direction. Then, since the diameter of the coil molded body 12 is reduced, the coil molded body 12 is inserted into the existing pipe 100 by pulling the rod portion 20b of the insertion jig 20 as it is.

  And if the coil molded object 12 is inserted in the existing pipe | tube 100 except a back end part, another coil molded object 12 will be connected with the back end part.

  As shown in FIGS. 6 and 7, the coupling tool 22 as the coupling means is formed in a socket shape having connection portions 22 a at both ends thereof. The connection portion 22a has a receiving structure, for example. When the coil molded bodies 12 are connected to each other, the end portions of the wire 16 of the coil molded body 12 are inserted into the receiving openings and joined together. .

  By repeating this, when the front end portion of the coil molded body 12 reaches the outlet of the existing pipe 100, the rotational force applied to the coil molded body 12 is released, and the coil molded body 12 is made substantially the original diameter. Return to.

  Subsequently, the lining material 14 is inserted into the coil molded body 12 previously inserted. Specifically, although not shown, a pulling wire is inserted into the coil molded body 12 and the pulling wire is connected to the lining material 14 on the insertion port side of the existing pipe 100. Then, the pulling wire is wound up with a winch, and the lining material 14 is inserted until the tip of the pulling wire reaches the outlet of the existing pipe 100.

  Next, after supplying steam or warm water into the lining material 14, it is pressurized to a predetermined pressure to form the lining pipe 24 in the coil molded body 12. Specifically, the lining material 14 is restored to a perfect circle or a substantially perfect circle that is sufficiently close to a true circle by being heated and applied with internal pressure. Then, the entire outer peripheral surface of the restored lining material 14 is brought into close contact with the entire inner surface of the coil molded body 12. Thereby, the rehabilitation pipe line 10 is formed in the existing pipe 100 over the entire length thereof.

  As described above, in this lining method, the coil molded body 12 is interposed between the inner surface of the existing pipe 100 and the outer surface of the lining pipe 24. For this reason, the time for restoring the lining material 14 to a cylindrical shape can be shortened by giving the coil molded body 12 an external pressure strength against the buried earth pressure and reducing the thickness of the tube wall of the lining material 14. it can. That is, according to this lining method, the time for forming the lining pipe 24 can be shortened. Further, by reducing the thickness of the tube wall of the lining material 14, the weight of the lining material 14 is reduced by that amount, so that the lining material 14 can be easily transported and handled. Therefore, it is excellent in workability.

  Furthermore, when the coil molded body 12 smoothly follows the bent pipe portion 104 and the stepped portion 106 of the existing pipe 100, when the lining material 14 is restored to a cylindrical shape, the bent portion 104 and the stepped portion 106 of the existing pipe 100 are used. Wrinkles are unlikely to occur. Therefore, the cross-sectional reduction of the lining pipe 24 is also reduced, and a decrease in the flow rate of the rehabilitation pipe 10 can be suppressed.

  Furthermore, in this embodiment, by inserting the coil molded body 12 through the insertion port of the existing pipe 100 or the like, the coil molded body having external pressure resistance can be installed in the existing pipe 100 over the entire length thereof. it can. That is, in this lining method, it is not necessary for the worker to enter the pipe and arrange the wire in a spiral manner as in Patent Document 2, and it is possible to deal with a pipe of a size in which the worker cannot enter and work. .

  Furthermore, in this embodiment, since the diameter of the coil molded body 12 is reduced before or during insertion into the existing pipe 100, the coil molded body 12 smoothly passes through the bent pipe portion 104 and the stepped portion 106 of the existing pipe 100. can do. That is, according to this embodiment, the coil molded body 12 is easily inserted into the existing pipe 100.

  In this embodiment, the coil molded bodies 12 are connected to each other in the axial direction by inserting and joining the end portions of the wire 16 of the coil molded body 12 to the connection portion 18a of the coupler 18, but the present invention is not limited to this. There is no need to be performed, and any appropriate coupling means can be applied as long as the coil molded bodies 12 are coupled so that the rotational force is transmitted.

  For example, suitable joining means such as adhesive joining, fusion joining, welding joining, and mechanical joining can be employed for joining the connecting portion 18a of the connector 18 and the wire 16 of the coil molded body 12.

  Further, as shown in FIG. 8, the end on the rear side of the wire 16 of one coil molded body 12 and the end on the front side of the wire 16 of the other coil molded body 12 are connected to a connecting device such as a steel band. The coil molded bodies 12 may be coupled in the axial direction by being wound and fixed at 24.

  Furthermore, in this embodiment, the required number of coil molded bodies 12 are connected in the axial direction according to the length of the existing pipe 100, but the present invention is not limited to this. This is merely connecting the coil molded body 12 having a predetermined length manufactured at a factory or the like before construction so as to correspond to the pipe length of the existing pipe 100 at the work site. If the axial length is longer than the pipe length of the existing pipe 100, it is not necessary to connect the plurality of coil molded bodies 12 in the axial direction, and the connecting tool 18 is also unnecessary.

  Alternatively, the wire 16 may be wound at the work site and inserted into the existing pipe 100 while the coil molded body 12 corresponding to the pipe length of the existing pipe 100 is manufactured. Also in this case, since it is not necessary to connect the plurality of coil molded bodies 12 in the axial direction, the connecting tool 18 is unnecessary.

  Furthermore, in this embodiment, the winding pitch P of the wire 16 of the coil molded body 12 is set to a length substantially equal to the wire diameter R of the wire 16, and the adjacent wires 16 are in close contact with each other without a gap. However, it need not be limited to this. As shown in FIG. 9, the winding pitch P of the wire 16 of the coil molded body 12 can be set larger than the wire diameter R of the wire 16. In this case, since a gap is generated between the wire members 16 of the coil molded body 12, it is preferable that the wire diameter R of the wire material 16 is set to a size that allows the coil molded body 12 to ensure a predetermined external pressure strength. is there. In this way, if the winding pitch P of the wire 16 of the coil molded body 12 is increased, the number of windings of the wire 16 can be reduced, so that the workability when manufacturing the coil molded body 12 can be improved. it can.

  Furthermore, in this embodiment, the coil molded body 12 is formed by winding the wire 16 having a substantially circular cross section, but it is not necessary to be limited to this.

  For example, although not shown, the coil molded body 12 can be formed using a wire 16 having an elliptical cross section. In this case, if the cross section of the wire 16 is set in a horizontally long elliptical shape, the number of windings of the wire 16 can be reduced, so that the workability when manufacturing the coil molded body 12 can be improved. If the cross section is set to a vertically long elliptical shape, the external pressure resistance of the coil molded body 12 can be improved.

  Moreover, as shown in FIG. 10, the coil molded object 12 can also be formed using the wire 16 which has a rectangular cross section. For example, when the nominal diameter of the coil molded body 12 is 450 mm, the width W of the wire 16 is 13 mm, and the thickness of the wire 16 (that is, the length of the wire 16 in the radial direction of the coil molded body 12) D is 6.5 mm. In this case, since the inner surface of the coil molded body 12 is formed in a flat shape, the inner surface of the coil molded body 12 and the outer surface of the lining pipe 24 are almost in surface contact.

  Furthermore, as shown in FIG. 11, the coil molded body 12 can also be formed by winding the wire 16 having a semicircular cross section so that the curved portion of the wire 16 is on the outer surface side. For example, when the nominal diameter of the coil molded body 12 is 450 mm, the width W of the wire 16 is 13 mm, and the thickness D of the wire 16 is 6.5 mm. Also in this case, since the inner surface of the coil molded body 12 is formed in a planar shape, the inner surface of the coil molded body 12 and the outer surface of the lining pipe 24 are almost in surface contact. Further, since the curved surface portion of the wire 16 is on the outer surface side of the coil molded body 12, when the coil molded body 12 is inserted into the existing pipe 100, the contact area between the coil molded body 12 and the inner surface of the existing pipe line 10 is kept small. Thus, the insertion resistance can be reduced.

  Furthermore, although illustration is omitted, the coil molded body 12 can be formed by winding the wire 16 having a horseshoe cross section so that the rectangular portion of the wire 16 is on the inner surface side. Also in this case, since the inner surface of the coil molded body 12 is formed in a planar shape, the inner surface of the coil molded body 12 and the outer surface of the lining pipe 24 are almost in surface contact. Further, since the curved surface portion of the wire 16 is on the outer surface side of the coil molded body 12, when the coil molded body 12 is inserted into the existing pipe 100, the contact area between the coil molded body 12 and the inner surface of the existing pipe line 10 is kept small. Thus, the insertion resistance can be reduced.

  In the modified embodiment of the coil molded body 12 described above, if the width W of the wire 16 of the coil molded body 12 is set large, the number of times of winding the wire 16 around the winding core is reduced. Workability at the time of manufacturing is improved, and if the thickness D of the wire 16 of the coil molded body 12 is set large, the external pressure resistance of the coil molded body 12 is improved.

  Furthermore, in this embodiment, the nominal diameter of the coil molded body 12 is set to be approximately equal to the inner diameter of the existing pipe 100, but it is not necessary to be limited to this.

  For example, the nominal diameter of the coil molded body 12 may be set smaller than the inner diameter of the existing pipe 100. For example, when the coil molded body 12 having a smaller diameter than the existing pipe 100 is used, the inner diameter of the coil molded body 12 is applied to the coil molded body 12 by the lining material 14 when the coil molded body 12 is restored. It is made to adhere to the whole inner surface of the existing pipe 100. By doing so, the coil molded body 12 can be easily inserted into the existing pipe 100 without reducing the diameter. That is, the work of reducing the diameter of the coil molded body 12 and the work of restoring the coil molded body 12 having the reduced diameter are not required, and the workability can be improved. In this case, the coil molded body 12 and the lining material 14 may be inserted simultaneously by inserting the lining material 14 into the coil molded body 12 in advance.

  Further, when the coil molded body 12 having a diameter smaller than that of the existing pipe 100 is used, it is not always necessary to apply an internal pressure to the coil molded body 12 by the lining material 14, so that the coil molded body 12 does not need to be expanded in diameter. The coil molded body 12 may be expanded in diameter by applying a rotational force in the opposite direction to the winding direction.

  Further, even when the coil molded body 12 having a smaller diameter than the existing pipe 100 is used, the coil molded body 12 may be reduced in diameter as necessary and inserted into the existing pipe 100.

  Furthermore, even when the coil molded body 12 having a smaller diameter than that of the existing pipe is used, the coil molded body 12 may be expanded as long as a flow rate smaller than that of the existing pipe 100 needs to be ensured with respect to the rehabilitation pipe line 10. Since the diameter does not need to be increased, the rehabilitating pipe line 10 is inserted into the coil formed body 12 having a diameter smaller than that of the existing pipe 100 by inserting a lining material that cannot expand the coil formed body 12 such as a substantially circular straight pipe. May be formed.

  The nominal diameter of the coil molded body 12 may be set slightly larger than the inner diameter of the existing pipe 100. In this case, it is preferable to insert the coil molded body 12 having a diameter reduced by applying a slightly stronger rotational force into the existing pipe 100. Then, since the coil molded body 12 that has been released from the rotational force and has returned to its original diameter comes into close contact with the inner surface of the existing pipe 100, the cross-sectional reduction of the rehabilitated pipe line 10 can be further reduced.

  Furthermore, in this embodiment, the shaft 22b of the insertion jig 22 is rotated in the same direction as the winding direction of the coil molded body 12 with the end on the rear side of the coil molded body 12 fixed so as not to rotate. However, it is not necessary to limit the present invention. In short, with the longitudinal direction of the coil molded body 12 as an axis, one side of the coil molded body 12 is rotated in the same direction as its winding direction, and the other side is fixed so as not to rotate or rotated in the opposite direction. If it makes it, a rotational force can be provided to the coil molded object 12 in the same direction as the winding direction, and the coil molded object 12 will be diameter-reduced by this.

  Furthermore, in this embodiment, the coil molded body 12 is reduced in diameter by applying a rotational force in the winding direction to the coil molded body 12, but it is not necessary to be limited to this. For example, instead of or in addition to applying a rotational force in the winding direction to the coil molded body 12, the coil molded body 12 is contracted by applying a tensile force in the extending direction to the coil molded body 12. You may make it diameter.

  For example, when applying a tensile force in the extension direction to the coil molded body 12, the shaft portion 22b of the insertion jig 22 is coil-molded in a state where the rear end of the coil molded body 12 is fixed so as not to move. The body 12 may be pulled in the same direction as the insertion direction. However, it is not necessary to be limited to this, and with the longitudinal direction of the coil molded body 12 as an axis, one side of the coil molded body 12 is pulled in the axial direction, and the other side is fixed so as not to move or in the opposite direction. If it is pulled, it is possible to apply a tensile force in the extension direction to the coil molded body 12 to reduce the diameter of the coil molded body 12.

  In this embodiment, the diameter of the coil molded body 12 is reduced before the coil molded body 12 is inserted into the existing pipe 100, and the reduced diameter coil molded body 12 is inserted into the existing pipe 100 as it is. However, it need not be limited to this.

  For example, the coil molded body 12 is inserted into the existing pipe 100 as it is without reducing its diameter, and when the coil molded body 12 passes through the bent pipe portion 104 or the stepped portion 106 of the existing pipe 100, as necessary. The coil molded body 12 may be appropriately reduced in diameter by applying a rotational force in the winding direction to the coil molded body 12 as appropriate. By doing so, the coil molded body 12 can easily pass through the bent portion 104 and the stepped portion 106 of the existing pipe 100.

  Of course, in this case as well, instead of or in addition to applying the rotational force in the winding direction to the coil molded body 12, a tensile force in the extending direction is applied to the coil molded body 12. The molded body 12 may be reduced in diameter.

  Further, the diameter of the coil molded body 12 is reduced in advance before being inserted into the existing pipe 100, and then the coil molded body 12 is further passed through the bent pipe portion 104 or the stepped portion 106 of the existing pipe 100. However, if necessary, the coil molded body 12 may be reduced in diameter by appropriately applying to the coil molded body 12 a rotational force in the winding direction, a tensile force in the extending direction, or both.

  Furthermore, in this embodiment, the coil molded body 12 is inserted into the existing pipe 100 by attaching the insertion jig 22 in front of the coil molded body 12 and pulling the rod portion 22b of the insertion jig 22. The insertion method is not limited to this, and any insertion method can be used as long as the technical idea of the present invention can be realized. For example, the coil molded body 12 whose diameter has been reduced by applying a rotational force in the winding direction or by applying a tensile force in the extension direction may be pushed into the existing pipe 100 as it is. Further, the coil molded body 12 may be inserted into the existing pipe 100 by winding the pulling wire connected to the coil molded body 12 with a winch or the like.

  The lining method which is another embodiment of the present invention shown in FIGS. 12 to 17 is the insertion of the coil molded body 12 and the lining material 14 that have been kept in a reduced diameter by using the restraining member 26, and The rehabilitation pipe line 10 is formed in the existing pipe 100. In the following, the same numbers are assigned to parts common to the embodiment shown in FIG. 1, and duplicate descriptions are omitted.

  As shown in FIG. 12, the restraining member 26 is formed into a cylindrical shape by overlapping the circumferential end portions of a sheet 28 made of synthetic resin such as polyethylene and sewing (sewing) with a sewing thread 30.

  For example, the end portions in the circumferential direction of the seat 28 are sewn by a sewing method (sewing method) in which the suture is released when the sewing thread is pulled from one side, but the sewing is not released even if the sewing thread is pulled from the opposite side. The

  In the specific example shown in FIG. 13, when the sewing thread 30 is pulled from the front side of the restraining member 26 (that is, the right side in FIG. 13), the sewing thread 30 is pulled out and the stitches between the sheets 28 are released. Even if the sewing thread 30 is pulled from the rear side (that is, the left side of FIG. 13), the sewing thread 30 cannot be pulled out, so that the sheets 28 cannot be sewn together.

  As shown in FIG. 13, the constraining member 28 houses (encloses) the coil molded body 12 having a reduced diameter. Specifically, the coil molded body 12 is reduced in diameter so as to have a smaller diameter than the existing pipe 100 by applying a rotational force in the winding direction. And the coil molded object 12 is hold | maintained with the diameter-reduced state by accommodating the coil molded object 12 in the restraining member 26. FIG. In this embodiment, the coil molded body 12 is reduced in diameter so that its outer diameter is about 90% of the inner diameter of the existing pipe 100.

  Furthermore, as shown in FIGS. 12 and 13, the front end portion of the sewing thread 30 extends to the rear side of the restraining member 26 through the outside of the restraining member 26. And this extended part is utilized as the unwinding thread | yarn 32 for releasing the stitching | suture of the restraint member 26 so that details may demonstrate later.

  Further, a lead wire 34 is connected to the rear end of the sewing thread 30. The lead wire 34 extends to the front side of the restraining member 26 through the inside of the restraining member 26 (that is, the inside of the coil molded body 12). A joint portion 36 for joining to the pulling wire 38 is provided at the tip of the lead wire 34. However, the connection structure of the joint portion 36 is not particularly limited and is not the gist of the present invention, and thus the details are not illustrated in FIGS. 12 and 14.

  Referring to FIG. 15 to FIG. 18, the restraint coil molded body (rehabilitation member) 40 in which the coil molded body 12 is accommodated in the restraint member 26 and the lining material 14 are used for aging. The procedure of the lining method for rehabilitating the existing pipe 100 will be described.

  First, the constrained coil molded body 40 is prepared. Specifically, by applying a rotational force in the winding direction to the coil molded body 12, the coil molded body 12 is reduced in diameter so as to have a smaller diameter than the existing pipe 100, and the coil molded body 12 is It is accommodated in the restraining member 26.

  Next, the lead wire 34 of the restraining member 26 is pulled out to the front side of the restraining member 26 through the inside of the coil molded body 12. Then, the pulling wire 38 drawn from the outlet 110 side of the existing pipe 100 to the insertion port 108 side is joined to the joint portion 36 of the lead wire 34.

  Then, the constraining coil molded body 40 is inserted a little from the insertion port 108 of the existing pipe 100, and the pulling wire 38 is wound up by a winch (not shown) or the like on the outlet 110 side of the existing pipe 100. At this time, as shown in FIG. 15, the unwinding thread 32 of the restraining member 26 is pulled out to the rear of the restraining member 26 through the outside of the restraining member 26 and is left in the insertion port 108 of the existing pipe 100.

  Then, after the constraining coil molded body 40 reaches the outlet 110 of the existing pipe 100, the unwinding thread 32 is pulled toward the rear side of the constraining member 26, that is, toward the insertion port 108 of the existing pipe 100.

  Then, as shown in FIG. 16A, the sewing thread 30 is sequentially pulled out from the sheet 28, and the stitches between the circumferential ends of the sheet 28 are released. When all the sewing threads 30 are pulled out from the sheet 28, the restraining member 26 can no longer maintain the cylindrical shape, so that the coil molded body 12 having a reduced diameter is released from the restraining of the restraining member 26.

  When the coil molded body 12 is released from the restraint of the restraining member 26, as shown in FIG. 16 (b), the coil molded body 12 expands its diameter by its restoring force and returns to the original diameter. The sheet 28 is in close contact with the entire inner surface of the existing pipe 100 via the sheet 28.

  Thereafter, the unwinding thread 32 is continuously pulled toward the insertion port 108 side of the existing pipe 100, thereby being joined to the lead wire 34 connected to the unwinding thread 32 (sewing thread 30) and the joint portion 36 of the lead wire 34. Since the pulled pulling wire 38 can be pulled back to the insertion port 108 side of the existing pipe 100, the pulling wire 38 is removed from the joint portion 36 of the lead wire 34, and the pulling wire 38 is connected to the lead wire of the next constraining coil molded body 40. It joins to the joint part 36 of 34. Subsequently, as shown in FIG. 16, the constrained coil molded body 40 newly connected to the pulling wire 38 is inserted into the existing pipe 100.

  Then, by winding the pulling wire 38 with a winch (not shown) or the like on the pulling outlet 110 side of the existing pipe 100, a restraining coil molded body 40 newly connected to the pulling wire 38 (a newly inserted restraining coil molded body 40). ) To the rear side of the coil molded body 12 inserted earlier.

  In FIG. 17, the newly inserted restraint coil molded body 40 is positioned by contacting the front end of the newly inserted restraint coil molded body 40 with the rear end of the previously inserted coil molded body 12. Although it seems to be possible, the thickness of the wire 16 (that is, the length of the wire 16 in the radial direction of the coil formed body 12) is the same as the coil formed body 12 shown in FIGS. When using the small coil molded object 12, it is also considered that the newly inserted restraint coil molded object 40 enters into the coil molded object 12 inserted previously. Therefore, when the coil molded body 12 having a small thickness of the wire 16 is used, the positional relationship between the previously inserted coil molded body 12 and the newly inserted restraint coil molded body 40 is appropriately determined by an in-tube camera or the like. It is desirable to confirm.

  Then, when the front side of the newly inserted restraint coil forming body 40 reaches the rear side of the previously inserted coil forming body 12, the coil forming body 12 is removed from the restraint of the restraining member 26 in the same manner as described above. release.

  Here, when the coil molded body 12 is released from the restraint of the restraining member 26, the diameter of the coil molded body 12 is expanded, but the length in the axial direction is shortened, and a gap is generated between the coil molded bodies 12 accordingly. Therefore, next, the position of the newly inserted restraint coil molded body 40 is adjusted using the position adjusting device 42.

  As an example of the position adjusting device 42, as shown in FIG. 17, the position adjusting device 42 includes an enlarged diameter portion 44, a vibrating portion 46, and a ventilation tube 48.

  The enlarged diameter portion 44 is made of an elastic material such as silicone rubber, urethane rubber, styrene butadiene rubber (SBR) and ethylene propylene rubber (EPDM), or natural rubber, and is formed in a hollow donut shape or a hollow ring shape. The The enlarged diameter portion 44 swells when air is injected into the internal space from the ventilation portion 48 and closely contacts the inner surface of the existing pipe 100.

  The vibration part 46 is attached to the rear side of the enlarged diameter part 44. The vibration part 46 is for vibrating the enlarged diameter part 44, and for example, an air vibrator or the like that generates vibration by rotating a steel ball at high speed with compressed air is used. However, it is not necessary to be limited to this.

  The ventilation tube 48 is for supplying air to the enlarged diameter portion 44 and the vibrating portion 46, and the tip portion thereof is hermetically connected to the internal space of the enlarged diameter portion 44 and the vibrating portion 46. An air pump (not shown) that can supply air is provided at the rear end of the ventilation tube 48.

  For example, the position adjusting device 42 is connected to the joint portion 36 or the like of the lead wire 34 so that the rear side of the restraint coil molded body 40 is moved together with the restraint coil molded body 40. Then, after the coil molded body 12 is released from the restraint of the restraining member 26, air is injected into the enlarged diameter portion 44 to inflate, and air is fed into the vibrating portion 46 to vibrate. Then, as shown in FIG. 17A, the enlarged diameter portion 44 is pressed against the rear side of the newly inserted coil molded body 12 by winding the pulling wire 38 with a winch (not shown) or the like. However, it should be noted that the drawing of the pulling wire 38 is omitted in FIG. 17 for simplification of the drawing. Then, the vibration of the vibration part 46 propagates from the enlarged diameter part 44 to the coil molded body 12, whereby friction on the sliding surface between the coil molded body 12 and the existing pipe 100 is reduced, and the coil molded body 12 can be easily made. You can move. Subsequently, by further winding the pulling wire 38 as it is, the coil molded body 12 is pushed in the insertion direction, and the front end of the newly inserted coil molded body 12 is moved forward as shown in FIG. The coil molded body 12 inserted in is closely attached or substantially adhered to the end on the rear side.

  Then, in the same manner as described above, the lead wire 34 connected to the unwinding thread 32 and the pulling wire 38 joined to the joint portion 36 of the lead wire 34 are pulled back to the insertion port 108 side of the existing pipe 100, The pulling wire 38 is further joined to the joint portion 36 of the lead wire 34 of the restraining member 26 of the next restraining coil molded body 40.

  Then, by repeating this, the coil molded body 12 is laid over the entire length of the existing pipe 100.

  Next, the lining material 14 is inserted into the coil molded body 12. Specifically, the pulling wire 38 is connected to the lining material 14 on the insertion port 108 side of the existing pipe 100, the pulling wire 38 is wound up with a winch, and the leading end of the lining material 14 is pulled out of the existing pipe 100. Insert until you reach.

  Subsequently, steam or hot water is supplied into the lining material 14 and then pressurized to a predetermined pressure to form the lining tube 24 in the coil molded body 12. Thereby, the rehabilitation pipe line 10 is formed in the existing pipe 100 over the entire length thereof.

  Thus, also in this embodiment, the coil molded body 12 is interposed between the inner surface of the existing tube 100 and the outer surface of the lining tube 24 as in the embodiment of FIG. The time required to restore the shape can be shortened. Further, the time for forming the lining tube 24 can be shortened. Therefore, it is excellent in workability.

  Further, in this embodiment, since the coil molded body 12 whose diameter is reduced to be smaller than that of the existing pipe 100 is accommodated in the restraining member 26, the clearance between the coil molded body 12 and the existing pipe 100 is increased. Since it can be ensured sufficiently, the coil molded body 12 can be easily inserted into the existing pipe 100.

  And since it is not necessary to apply a rotational force in the winding direction to the coil molded body 12 at the construction site to reduce the diameter before or during the insertion into the existing pipe 100, the working time at the construction site can be made longer than before. It can be shortened and labor can be reduced.

  That is, according to this embodiment, the coil molded body 12 can be easily inserted into the existing pipe 100, and the complicated diameter reduction work at the construction site is not required, so that the workability can be dramatically improved. . In addition, since the work of reducing the diameter of the coil molded body 12 at the construction site is not necessary, the work can be stably performed without depending on the skill of the worker.

  Furthermore, in this embodiment, when the coil molded body 12 is inserted into the existing pipe 100, a restraining member 26 (sheet 28) is interposed between the coil molded body 12 and the inner surface of the existing pipe 100. For this reason, the insertion resistance of the coil molded body 12 can be reduced. In addition, since the direct contact between the coil molded body 12 and the existing pipe 100 can be avoided by the sheet 28, the coil molded body 12 can be prevented from being damaged.

  Furthermore, since the sheet 28 is interposed between the coil molded body 12 and the inner surface of the existing pipe 100, intrusion water from the outside is stopped by the sheet 28 when the existing pipe 100 is damaged. It is possible. Accordingly, when the lining material 14 is restored, the lining material 14 is not restored sufficiently due to a temperature drop caused by the intruding water.

  In this embodiment, instead of or in addition to applying a rotational force in the winding direction to the coil molded body 12, by applying a tensile force in the extending direction to the coil molded body 12, The diameter of the coil molded body 12 may be reduced.

  Also in this embodiment, a coil molded body is formed by winding a wire 16 having an elliptical cross section, a wire 16 having a rectangular cross section, a wire 16 having a semicircular cross section, or a wire 16 having a cross-section horseshoe shape. 12 may be formed.

  Further, in the restraining member 26 shown in FIG. 12, the circumferential end portions of the sheets 28 overlapped in the radial direction of the restraining member 26 are stitched together with the sewing thread 30. However, the present invention is not limited to this. The circumferential end portions of the sheet 28 overlapped in the circumferential direction of the member 26 may be stitched together with the sewing thread 30, and a plurality of stitched portions may be provided in the circumferential direction of the restraining member 26. .

  Furthermore, the coil molded body 12 whose diameter is reduced is accommodated in the restraining member 26 that is necessarily formed by stitching the circumferential end portions of the sheet 28 into a cylindrical shape, and the coil molded body 12 is pulled out by pulling out the sewing thread 30. Need not be released from the restraint of the restraining member 26.

  For example, the coil molded body 12 having a reduced diameter may be accommodated in a restraining member 26 that is fused or bonded to the circumferential end portions of the sheet 28 to form a cylindrical shape. When the coil molded body 12 is released from the restraint of the restraining member 26, the wire 50 is extended along the axial direction from the rear side of the restraining member 26 as shown in FIG. Is hooked to the front side of the restraining member 26 so as to extend from the inner surface to the inner surface. Then, after the constraining coil molded body 40 is inserted into the existing tube 100, the constraining member 26 is cut over the entire length in the axial direction by pulling both ends of the wire 50 toward the insertion port 108 side of the existing tube 100. . In this case, it is desirable to form a perforation, a thin portion, or the like in the sheet 28 in advance along the line to be cut.

  However, it is not always necessary to cut the sheet 28 with the wire 50 over the entire length in the axial direction. For example, the sheet 28 is melted by being heated with an iron, a heating wire or the like over the entire length in the axial direction. Alternatively, it may be chemically dissolved with warm water, chemicals, or the like.

  As shown in FIG. 19, the coil molded body 12 having a reduced diameter may be covered with a thin film 52 of a flexible material such as a soft synthetic resin by insert molding or the like. For example, when releasing the coil molded body 12 from the restraint by the thin film 52, a cutting line 52a (imaginary line in FIG. 20) is set in accordance with the gap between the adjacent wire members 16, and the thin film 52 is moved along the cutting line 52a. Cut in a spiral. In this case, since the restraining member 26 has flexibility, the coil molded body 12 can be elongated. Therefore, workability is further improved.

  Furthermore, it is not always necessary to house the coil molded body 12 having a reduced diameter in the restraining member 26 having a cylindrical shape, and by directly fixing the coil molded body 12 with a string or a dedicated jig, the coil You may make it hold | maintain the state to which the molded object 12 was diameter-reduced.

  For example, as shown in FIG. 20, the strings 54 a and 54 b are arranged on the outer side and the inner side of the wire 16 over the entire length of the coil molded body 12 in the axial direction so that the two strings 54 a and 54 b are staggered. The coil molded body 12 is fixed by the tension of the strings 54a and 54b. In this case, it is desirable to perform fixing with two strings 54a and 54b at a plurality of, for example, three or more positions in the circumferential direction of the coil molded body 12.

  Furthermore, in the embodiment shown in FIG. 17, after inflating the expanded diameter portion 44 by injecting air, the coil formed body 12 is pushed and moved by the expanded diameter portion 44 that propagates the vibration of the vibrating portion 46. Although the position of the coil molded body 12 has been adjusted, it is not necessary to be limited to this, and any position adjusting device 42 may be used as long as the technical idea of the present invention can be realized.

  For example, although not shown, a disc-shaped synthetic resin plate set to a size substantially equal to the inner diameter of the existing pipe 100 may be used instead of the enlarged diameter portion 44. Further, instead of the enlarged diameter portion 44, a hook-shaped locking portion is attached to the rear of the vibration portion 46, and the coil molded body 12 is moved by hooking the rear end portion of the coil molded body to the locking portion. You may do it.

  Further, the position adjusting device 42 is connected to the joint portion 36 of the lead wire 34 and the like so that the rear side of the restraint coil molded body 40 is moved together with the restraint coil molded body 40. However, the present invention is not limited to this. However, it may be carried into the existing pipe 100 by a self-propelled robot (not shown).

  Further, if the gap between the previously inserted coil molded body 12 and the newly inserted coil molded body 12 is large enough to ensure a predetermined resistance against external pressure, the position of the coil molded body 12 is adjusted. do not have to.

  Furthermore, such a position adjusting device 42 can be used in the embodiment shown in FIG. By doing so, it is not necessary to connect the plurality of coil molded bodies 12 in the axial direction, so the connecting tool 18 and the like are not necessary.

  Note that “rehabilitation” in each of the embodiments described above is a concept including the entire repair work and renovation work of the existing pipe 100.

  In each of the above-described embodiments, the rehabilitation pipe 10 is formed over the entire length of the existing pipe 100. However, the present invention is not limited to this, and the existing pipe 100 is partially formed by the lining method of the present invention. It may be rehabilitated (repaired). For example, if the existing pipe 100 is partially rehabilitated, there is no need to use a plurality of coil molded bodies 12 or a plurality of constrained coil molded bodies 40, and the connection tool 18, the position adjusting device 42, etc. are unnecessary. .

  Further, in each of the above-described embodiments, the rehabilitated pipeline 10 is formed in the existing pipe 100 by inserting the coil molded body 12 and the lining material 14 into the existing pipe 100, but the present invention is not limited thereto. There is no need. The coil molded body 12 formed into a cylindrical shape by winding the wire 16 is merely an example of a strength reinforcing body for reinforcing the external pressure strength of the lining pipe 14, and the coil molded body 12 is not necessarily used as the strength reinforcing body. There is no need to use.

  For example, as another example of the strength reinforcing body, the strength reinforcing body 56 shown in FIG. 21A is a fiber reinforced plastic such as GFRP (glass fiber reinforced plastic) or CFRP (carbon fiber reinforced plastic), or hard vinyl chloride. And is formed in a cylindrical shape having slits at predetermined positions in the circumferential direction.

  The strength reinforcing body 56 is reduced in diameter by overlapping the circumferential end portions facing each other across the slit. Then, by accommodating (encapsulating) the strength reinforcing body 56 thus reduced in diameter in the restraining member 26, the strength reinforcing body 56 can be held in a reduced diameter state. That is, thereby, the constraint strength reinforcing body 58 (rehabilitation member) is formed.

  Also in this case, when the restraining strength reinforcing body 58 is inserted into the existing pipe 100 and the stitching between the circumferential ends of the seat 28 of the restraining member 26 is released in the same manner as described above, FIG. As shown, the strength reinforcing body 56 is released from the restraint of the restraining member 26. Then, the strength reinforcing body 56 expands by its restoring force and returns to the original cylindrical shape, and the strength reinforcing body 56 comes into close contact with the entire inner surface of the existing pipe 100 via the sheet 28.

  Also in this embodiment, since the coil molded body 12 can be easily inserted into the existing pipe 100, and the complicated diameter reduction work at the construction site is not required, the workability can be greatly improved.

  For example, the “lining material” is not limited to a reduced diameter tube that has been partially flattened or folded and flattened by a diameter reduction process, but a straight pipe having a substantially circular cross section or the like is reduced in its original shape. A reduced diameter pipe may be used.

  Furthermore, the lining pipe 24 does not necessarily need to be restored so that the reduced diameter pipe is in close contact with the inner surface of the coil molded body 12. For the lining method of the present invention, various lining pipes such as a lining pipe in which a long strip-like member is spirally wound and a lining pipe in which a plate-like member is attached in the circumferential direction or the longitudinal direction can be applied. Furthermore, a lining pipe other than the resin material may be applied.

  Furthermore, the specific numerical values such as the diameter and height described above are merely examples, and can be appropriately changed as necessary.

DESCRIPTION OF SYMBOLS 10 ... Rehabilitation pipe | tube 12 ... Coil molded object 14 ... Lining material 16 ... Wire rod 18 ... Connecting tool 22 ... Insertion jig 26, 52, 54 ... Restraint means 28 ... Sheet 24 ... Lining pipe 40 ... Restraint coil molded object 56 ... Strength Reinforcing body 58 ... Restraint strength reinforcing body 100 ... Existing pipe

Claims (14)

A lining method to rehabilitate existing pipes,
(A) inserting a coil molded body into the existing pipe;
(B) A lining method comprising: inserting a lining material into the coil molded body; and (c) forming a lining pipe in the existing pipe with the lining material.   In the step (a), a coil molded body whose diameter is reduced to be smaller than the existing pipe is inserted into the existing pipe, and the coil molded body is reduced in diameter before the step (b). The lining method according to claim 1, wherein the lining method is restored from the state.   The said step (a) WHEREIN: Before inserting the said coil molded object in the said existing pipe, it is diameter-reduced by giving the rotational force to the said coil molded object in the winding direction. Lining method.   4. The method according to claim 1, wherein, in the step (a), before inserting the coil molded body into the existing pipe, the coil molded body is reduced in diameter by applying a tensile force in an extension direction thereof. The lining method described in 1.   In the step (a), the coil molded body is reduced in diameter by applying a rotational force in the winding direction to the coil molded body as necessary while inserting the coil molded body into the existing pipe. The lining method according to any one of the above.   6. The step (a), wherein the coil molded body is reduced in diameter by applying a tensile force in the extension direction to the coil molded body as necessary while being inserted into the existing pipe. The lining method described in Crab. Before the step (a), (d) the coil molded body that has been reduced in diameter so as to have a smaller diameter than the existing pipe is restrained by restraining means, thereby reducing the diameter of the coil molded body. Further comprising the step of preparing the constrained coil molded body held as it is,
In the step (a), the constrained coil molded body prepared in the step (d) is inserted into the existing pipe,
The lining method according to claim 1 or 2, wherein, prior to the step (b), the constrained coil molded body is released from being constrained by the restraining means, and thereby the coil molded body is restored from a reduced diameter state.   In the step (a), the coil molded body having a diameter smaller than that of the existing pipe is inserted into the existing pipe, and the diameter of the coil molded body is expanded before the step (c) or in the step (c). The lining method according to claim 1. A lining method to rehabilitate existing pipes,
(E) A restraint strength reinforcing body that holds the strength reinforcing body in a reduced diameter state is prepared by restraining a strength reinforcing body that has been reduced in diameter so as to have a smaller diameter than the existing pipe by a restraining means. Step,
(F) inserting the restraint strength reinforcing body prepared in step (e) into the existing pipe;
(G) recovering the strength reinforcing body from a reduced diameter state by releasing the restraining strength reinforcing body from being restrained by the restraining means;
(H) A lining method comprising the steps of: inserting a lining material into the strength reinforcing body; and (i) forming a lining pipe in the existing pipe with the lining material.   A rehabilitation pipe formed in the existing pipe by the lining method according to claim 1. A member for rehabilitation used in the lining method according to any one of claims 1 to 8 and interposed between the existing pipe and the lining material,
A rehabilitation member comprising a coil molded body inserted into the existing pipe.   The rehabilitation member according to claim 11, further comprising a restraining unit that restrains the coil molded body in a state in which the diameter of the coil molded body is reduced by restraining the coil molded body. A retreading member that is used in the lining method of claim 9 and is interposed between the existing pipe and the lining material,
A rehabilitation member comprising a strength reinforcing body inserted into the existing pipe, and restraining means for restraining the strength reinforcing body to keep the strength reinforcing body in a reduced diameter state.   The rehabilitation member according to claim 12 or 13, wherein the restraining means is a cylindrical sheet.

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