JP2015183836A - Lining method and recovered piping passage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a work for laying a coil forming body into an existing pipe to be carried out further easily.SOLUTION: Core members (20) having hollow parts and a diameter expansion device (60) separate from the core members (20), which can move within the hollow portions of the core members (20) are utilized in a lining method. A plurality of core members (20) each of which holds a diameter reduced coil forming body (10) are drawn by a rope (108) passed through a first man-hole (102) from a second man-hole (104) into an existing pipe (100) under a state in which the core members are connected by a connecting member (90). The coil forming body is removed by one diameter expansion device in sequence from the core member near the first man-hole to expand the diameter.

Description

  The present invention relates to a lining method and a rehabilitation pipe, and more particularly, to a lining method and a rehabilitation pipe for forming a rehabilitation pipe in an existing pipe that has been aged using a coil molded body.

An example of the background technology as the background of the present invention is disclosed in Patent Document 1. In the technique of this Patent Document 1, a coil molded body laying device capable of self-propelled in an existing pipe is used, and the reduced diameter coil molded body is fixed on the coil molded body laying apparatus by a chuck unit, and the wheel is moved into the existing pipe Then, the coil molded body is laid in the existing pipe by removing it from the chuck unit at a predetermined position in the existing pipe and restoring the coil molded body.
JP 2013-226808 [B29C 63/34 F16L 55/16, 1/00]

  In the technique of Patent Document 1, a coil molded body that has been reduced in diameter is held in a coil molded body laying device, and the coil molded body laying device is self-propelled to lay and expand the coil molded body in an existing pipe. Although there is an advantage that the body laying operation can be easily performed, one coil molded body laying device is required to lay one coil molded body, and costs are increased.

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

  Another object of the present invention is to provide a lining method and a rehabilitation pipeline that can improve workability while suppressing costs.

  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 aspect of the present invention is a lining for forming a rehabilitating pipe line by laying a coil molded body in an existing pipe buried between a first manhole and a second manhole and inserting a lining material into the coil molded body. Construction method,
(A) Each of the hollow parts has a hollow portion, and a plurality of core members are held on the outer surface of the coil body, the coil formed body having an outer diameter corresponding to the inner diameter of the existing pipe being held in a reduced diameter. Step into the tube,
(B) A step of expanding the diameter of the coil molded body held by the leading core material by removing the coil molded body from the leading core material;
(C) a step of positioning the subsequent core material at a position subsequent to the coil molded body whose diameter has been expanded in step (b) by further moving the subsequent core material;
(D) expanding the diameter of the coil formed body held by the positioned subsequent core material by removing the coil molded body from the positioned subsequent core material; and (e) steps (c) and (d) Is a lining method including a step of laying a coil molded body in an existing pipe by repeating as necessary.

  In the first invention, for example, a core member (20) and a diameter expanding device (60) separate from the core member (20) are used. The core material (20) has a hollow portion, for example, is formed in a cylindrical shape, and holds the coil molded body (10) in a reduced diameter state on the outer surface thereof. The outer diameter of the coil molded body (10) is set slightly larger than the inner diameter of the existing pipe (100) to be rehabilitated. The diameter expanding device (60) is shaped to be movable within the hollow portion of the core (20). A plurality of core members each holding a coil compact having a reduced diameter on the outer surface are connected using, for example, a connecting member (90) and drawn into the existing pipe. Next, for example, the diameter of the coil molded body is increased by removing the holding of the coil molded body on the core material using a diameter expanding device. Specifically, out of a series of core materials drawn into the existing pipe, first, the diameter of the coil molded body is expanded by removing the coil molded body on the leading core material. When the diameter of the coil molded body is increased, the axial length is shorter than when the diameter is reduced on the core material. Therefore, a large space is generated between the preceding coil molded body whose diameter has been expanded and the coil molded body whose diameter has been reduced on the subsequent core material. Therefore, after the subsequent core material is further moved, the subsequent core material is positioned at a position subsequent to the coil formed body whose diameter has been expanded first, and then the diameter expanding device is moved to the hollow portion of the subsequent core material. Thereby, the diameter of the coil molded body held on the core material is expanded. Thereafter, such positioning and diameter expansion are repeated, and the coil molded body is laid in the existing pipe.

  According to the first aspect of the present invention, each of the core members is reduced in diameter and held, and a plurality of core members connected to each other are continuously drawn into the existing pipe, and then each core member is placed on each core member using a diameter increasing device. By expanding the diameter of the coil formed body, it is easy to introduce the core material, that is, the reduced diameter coil formed body into the existing pipe, and the diameter of the coil formed body on each core material is continuously increased. Therefore, the coil forming body laying process in the lining method can be performed efficiently.

  A second invention is a lining method according to the first invention, wherein steps (b) and (d) are executed by a diameter expanding device that moves in a hollow portion of a core material.

  In the second invention, the diameter expansion device (60) is shaped to be movable within the hollow portion of the core material (20), and the subsequent core material is moved by moving the subsequent core material. After positioning at a position subsequent to the coil molded body whose diameter has been expanded first, the diameter expanding device is moved to the hollow portion of the subsequent core material, and the diameter of the coil molded body held by the subsequent core material is expanded.

  According to the second invention, the diameter expansion device can be moved through the hollow portion of the core material and into the core material holding the coil molded body to be expanded next. Efficient.

  The third invention is dependent on the first or second invention, and in step (a), the core material is sequentially drawn from the second manhole into the existing pipe by pulling the leading core material from the first manhole side. It is a construction method.

  In the third invention, for example, the rope (108) is pulled with a winch from the first manhole (102), and the leading conduit (110) is connected to the rope (108), for example, in the second manhole (104). The core material (20), which is held on the outer surface in a state where the diameter of the coil molded body (10) is reduced, is sequentially connected to the rear of the tip conduit (110). Then, by pulling the rope (108) through the first manhole (102) by the winch, the leading conduit (110) and the plurality of cores (20) following the leading conduit (110) are moved from the second manhole (104) into the existing pipe (100). Be drawn.

  According to the third invention, for example, the core material can be sequentially drawn into the existing pipe by pulling the rope from the first manhole.

  A fourth invention is a lining method according to any one of the first to third inventions, further including a step (f) of taking out the core material from which the coil molded body is removed through the first manhole.

  In the fourth invention, when the core material (20) obtained by releasing and expanding the coil molded body (10) sequentially aligns the subsequent core material (20), the subsequent core material (20) is pushed, Come out in the first manhole (102). Therefore, if the connection of the core material by the connecting member (90) is released, it can be taken out from the upper opening of the first manhole (102) to the ground.

  According to the fourth aspect, the core material that has been emptied can be sequentially recovered from the first manhole, so that the core material can be efficiently recovered.

  A fifth invention is a lining method according to the fourth invention, wherein in step (f), the core material is taken out every time step (b) or (d) is executed.

  In the fifth invention, when the subsequent core material (20) is sequentially aligned, it is pushed by the subsequent core material (20) and comes into the first manhole (102). It can be taken out from the upper opening of the manhole (102) to the ground.

  According to the fourth aspect, the core material that has been emptied can be sequentially recovered from the first manhole, so that the core material can be efficiently recovered.

  A sixth invention is a lining method according to the fourth invention, wherein in step (f), a plurality of core materials are taken out at a time after executing step (b) or (d).

  In the sixth invention, when the core material (20) obtained by releasing and expanding the coil molded body (10) sequentially aligns the subsequent core material (20), it is pushed by the subsequent core material (20), Since it comes out in the 1st manhole (102), a several core material can be taken out to the ground from the 1st manhole (102) at once.

  According to the sixth invention, the empty core material can be efficiently recovered.

  A seventh invention is dependent on any one of the first to sixth inventions, and in step (a), a plurality of core members connected in advance on the ground are sequentially drawn into the existing pipe through the second manhole. It is a construction method.

  In the seventh invention, a connecting member (for example, FIG. 30) whose connecting length can be expanded and contracted is used as the connecting member (90), and the preceding core material and the following core material are sequentially connected on the ground. Then, the connection length is increased until the manhole is drawn into the existing pipe (100), and the connection length is reduced when the pipe is drawn into the existing pipe. Although it may be drawn into the existing pipe while the connection length is long, the number of core materials that can be drawn into the existing pipe at a time is reduced. Such a problem does not occur if the connection length is shortened and retracted.

  According to the seventh aspect of the invention, the work of connecting the plurality of core members holding the coil molded body in a reduced diameter state can be performed on the ground, so that the construction efficiency is improved.

  An eighth invention is a lining method according to any one of the first to sixth inventions, wherein in step (a), a plurality of core members are sequentially drawn into an existing pipe while being connected in a second manhole.

  In the eighth invention, in the manhole, the preceding core material and the subsequent core material are connected and sequentially drawn into the existing pipe.

  According to the eighth invention, since the connection is not performed on the ground, the work on the ground can be simplified, and the work space therefor may be small.

  A ninth invention is according to the first invention, and in step (a), in the first section between the first manhole and the second manhole, in step (a), (a1) the plurality of core members are pulled from the first manhole side. Pull in the existing pipes sequentially, after step (a1), execute steps (b)-(e) in the first section, (g1) after step (e), the second manhole between the first manhole and the second manhole A plurality of core materials in the second section different from the first section, with the coil molded body removed, are taken out from the first manhole, and then in step (a), (a2) a plurality of core materials are pulled from the second manhole side. Are sequentially drawn into the existing pipe in the second section, and after steps (a2), steps (b)-(e) are executed in the second section, and (g2) the coil in the first section after step (e) Linin removes a plurality of core materials from which the molded body has been removed from the second manhole. It is a construction method.

  In the ninth invention, the predetermined section between the first manhole (102) and the second manhole (104) is divided into two, for example, and the first section (S1) and the first manhole (102 near the second manhole (104) are divided. A second section (S2) close to) is set. For example, by pulling the rope (108) from the first manhole (102), the coil compacts each having a reduced diameter from the second manhole (104) are held in the first section (S1) of the existing pipe (100). Pull multiple cores that are running. Next, the diameter of the coil molded body (10a1-10a5) is sequentially increased from the core material (20a1-20a5) in the first section (S1) while positioning the subsequent core material. At that stage, since the empty core material (20a1-20a5) is pushed into the second section (S2), each core material (20a1-20a5) is then recovered from the first manhole (102) to the ground. To do.

  Next, a plurality of core members (20b1-20b5) holding the coil molded bodies (10b1-10b5) each having a reduced diameter are inserted into the second section (S2) from which the core member has been removed, for example, the second manhole ( Pull the rope (108) from 104) and pull it from the first manhole (102). Next, the diameter of the coil molded body (10b1-10b5) is sequentially expanded from the core material (20b1-20b5) in the second section (S2) while positioning the subsequent core material. At that stage, since the empty core material (20b1-20b5) is pushed into the first section (S1), each core material (20b1-20b5) is then recovered from the second manhole (104) to the ground. To do.

  According to the ninth aspect of the present invention, for example, the core material recovery step can be performed independently in time after the drawing of the core material and the diameter expansion process of the coil molded body in each section. Therefore, since the two steps can be performed in a time-sharing manner, the two steps can be performed by the same worker, resulting in a saving in laying cost.

  A tenth invention is a lining method according to any one of the first to ninth inventions, further executing a step of laying a lining material inside a coil molded body laid by a lining method according to these. .

  In the tenth invention, the existing pipe can be renewed by lining the lining material (18) inside the coil molded body (10) laid in the existing pipe (100).

  The eleventh invention is a rehabilitation pipeline rehabilitated by the lining method according to the tenth invention.

  According to the present invention, since the plurality of connected core members are continuously drawn into the existing pipe, the diameters of the coil formed bodies on the respective core members can be sequentially expanded, which is efficient.

  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.

FIG. 1 is a schematic view showing a coil molded body used in a lining method using an embodiment of the present invention. FIG. 1 (a) shows a coil molded body before diameter reduction, and FIG. The coil molded body of the diameter state is shown. FIG. 2 is a schematic view showing a lining material used in the lining method, FIG. 2 (a) shows a plan view of the lining material, and FIG. 2 (b) shows a cross-sectional view. FIG. 3 is a schematic view of an example of a core material constituting the coil molded body laying device of one embodiment of the present invention, and shows a perspective view seen from the front. FIG. 4 is a perspective view of the core member shown in FIG. FIG. 5 is a schematic view showing an example of a diameter expanding device constituting the coil molded body laying device of one embodiment of the present invention. FIG. 5 (a) is a perspective view seen from the front upper surface, and FIG. ) Shows a perspective view seen from the rear front lower surface. FIG. 6 is a schematic view showing a state in which the coil molded body shown in FIG. 1 (a) is held on the outer surface of the core material shown in FIGS. 3 and 4 with a reduced diameter, and FIG. A perspective view seen from the front is shown, and FIG. 6B shows a perspective view seen from the rear of the core member. The FIG. 7 is a schematic view showing an example of a connecting member for connecting two core members, FIG. 7 (a) shows a state where two core members are not yet connected, and FIG. 7 (b) shows a subsequent core. FIG. 7C shows a state in which the IT hanger rotating plate attached to the core connecting bracket preceding the material connecting bracket is inserted, and FIG. 7C shows a state in which the IT hanger rotating plate is rotated and connected. FIG. 8 is a schematic view showing an initial step of a coil molded body laying method in the lining method according to one embodiment of the present invention. FIG. 9 is a schematic view showing the next step of the coil body laying method. FIG. 10 is a schematic view showing a process after FIG. 9 of the coil molded body laying method. FIG. 11 is a schematic view showing a process after FIG. 10 of the coil molded body laying method. FIG. 12 is a schematic view showing a state in which a diameter increasing device is inserted in a hollow portion of a core material holding a reduced-diameter coil molded body on the outer surface, FIG. 12 (a) is a perspective view, and FIG. (B) is the figure seen from the left side surface, and FIG.12 (c) is a figure which shows the inside of the core material cut | disconnected in line XIIC-XIIC of FIG.12 (b). FIG. 13 is a schematic view showing a step after FIG. 11 of the coil molded body laying method. FIG. 14 is a schematic view showing the process between FIG. 11 and FIG. FIG. 15 is a schematic view showing a step after FIG. 13 of the coil body laying method. FIG. 16 is a schematic view showing the final step of the coil molded body laying method. FIG. 17 is a schematic view showing a lining material laying method in the lining method according to this embodiment. FIG. 18 is a schematic diagram showing an initial step of a coil molded body laying method in a lining method according to another embodiment of the present invention. FIG. 19 is a schematic view showing the next step of the coil body laying method. FIG. 20 is a schematic view showing a step after FIG. 19 of the coil body laying method. FIG. 21 is a schematic view showing a step after FIG. 20 of the coil molded body laying method. FIG. 22 is a schematic view showing a step after FIG. 21 of the coil molded body laying method. FIG. 23 is a schematic view showing a step after FIG. 22 of the coil molded body laying method. FIG. 24 is a schematic view showing a step after FIG. 23 of the coil body laying method. FIG. 25 is a schematic view showing a step after FIG. 24 of the coil molded body laying method. FIG. 26 is a schematic view showing a step after FIG. 25 of the coil body laying method. FIG. 27 is a schematic view showing a step after FIG. 26 of the coil molded body laying method. FIG. 28 is a schematic view showing a step after FIG. 27 of the coil molded body laying method. FIG. 29 is a schematic view showing the final step of the coil molded body laying method. FIG. 30 is a schematic plan view showing an example of a connecting member used in another embodiment of the present invention. FIG. 31 is a schematic cross-sectional view showing a state in which the preceding core connecting metal fitting and the subsequent core connecting metal fitting are connected by the connecting member of FIG. 30. 32 is a schematic view showing that the connection length can be expanded and contracted using the connection member of FIG. 30, FIG. 32 (a) shows a state where the connection length is extended to the maximum, and FIG. 32 (b) shows the connection length. This shows a state where the height is reduced to the minimum. FIG. 33 is a schematic view showing a state in which the core material connected using the connecting member of this embodiment is drawn into the existing pipe.

  Referring to FIG. 1, a coil molded body 10 used in an embodiment of the present invention is obtained by winding a coil wire 12 in a spiral shape, and the outer diameter D1 of the coil molded body 10 is aged to be rehabilitated. It is set to be the same as or slightly larger than the inner diameter of the existing pipe 100 (not shown in FIG. 1 (FIG. 8)).

  Various existing pipes to be rehabilitated using the lining method of the present invention can be considered, for example, existing pipes for uses such as water and sewage, gas, communication cable protection or power cable protection. Alternatively, it may be made of a material such as a reinforced concrete pipe (fume pipe), a ceramic pipe, a cast iron pipe, a steel pipe, and a synthetic resin pipe such as a vinyl chloride pipe.

  A coil molded body 10 shown in FIG. 1 includes a material having sufficient rigidity and elasticity, for example, a metal such as an aluminum alloy, steel or stainless steel, a synthetic resin, and GFRP (glass fiber reinforced plastic) or CFRP (carbon fiber reinforced plastic). In this embodiment, GFRP is used as the material of the coil molded body 10.

  The coil molded body 10 is formed in a cylindrical shape by winding a rectangular wire 12 having a horizontally long cross section perpendicular to the length direction around a winding core (not shown). However, the method for forming the coil molded body 10 is not particularly limited, and the coil molded body 10 may be formed by spirally cutting a fiber-reinforced plastic tube, or a resin or the like may be formed in a dedicated mold. You may make it shape | mold by pouring. The nominal diameter D1 of the coil molded body 10 is set to a size corresponding to the inner diameter of the existing pipe as described above. As an example, the nominal diameter D1 is 300 to 700 mm, and the axial length L1 is 300 to 700 mm. is there.

  A female screw 14a is formed at one end of the wire 12 of the coil molded body 10 shown in FIG. Although only one end is drawn in FIG. 1, it is not shown, but a female screw is also formed at the other end. For the sake of convenience, the female screw at the other end is referred to as “14b” for convenience. The female screw 14a (and 14b) is used to hold the coil molded body 10 on a core material (FIGS. 3 and 4) described later. As described above, the wire 12 of the coil molded body 10 is, for example, GFRP, and even if tapped as it is, it is difficult to form a female screw. Accordingly, the inventors prepared a metal chip having a female screw, embedded it in a hole formed at a corresponding position of the wire 12 and bonded it, and bonded both ends of the wire 12 of the coil molded body 10. The internal thread 14a (and 14b) was formed in the. However, the method of forming the female screw 14a (and 14b) is not limited to such a method.

  The coil molded body 10 can be reduced in diameter according to its rotational force or tensile force when rotated in the winding direction (pulled) or pulled in the extending direction due to its characteristics (rigidity, elasticity, etc.). By utilizing such characteristics, in the lining method using the coil molded body laying apparatus of the embodiment according to the present invention, the coil molded body 10 having the outer diameter D1 and the length L1 shown in FIG. As shown in FIG. 1B, the diameter of the coil molded body 10 having an outer diameter D2 (D1> D2) and a length L2 (L1 <L2) is reduced and introduced into the existing pipe.

  In order to rehabilitate the existing pipe, a lining material must be lined on the inner surface of the coil molded body 10 laid in the existing pipe as described below. As an example, the lining material 18 shown in FIG. 2 is a reduced diameter tube having a substantially heart-shaped cross section in which a part in the circumferential direction is pushed in by a reduced diameter process. The lining material 18 can be formed of, for example, a synthetic resin (polyethylene, polybutene, polypropylene, nylon, vinyl chloride, etc.), fiber reinforced plastic, or the like. In the embodiment, a polyethylene lining material 18 is used.

  The lining material 18 is restored to a cylindrical shape by being heated to a predetermined temperature and pressurized, and is brought into close contact with the inner surface of the coil molded body 10 to form a rehabilitation pipe line (lining pipe). The lining material 18 is set so that the outer diameter when restored is equal to or substantially equal to the inner diameter of the coil molded body 10.

  Since the lining material 18 can be manufactured by various known methods, a detailed description of the manufacturing method is omitted, but simply speaking, with respect to a straight pipe extruded with a predetermined diameter, It is manufactured by heating to a predetermined temperature in the range from the softening point to the melting point (in this embodiment, for example, about 100 ° C.) to form a substantially U-shaped indented portion using a push plate, a roller, or the like. The Therefore, by heating the lining material 18 again to a temperature above the softening point and below the melting point and pressurizing from the inside, the indented portion is returned to the outer surface side, and the lining material 18 is restored to a predetermined shape (cylindrical shape, etc.) within the existing pipe. To do.

  In this embodiment, the core material 20 shown in FIGS. 3 and 4 is used to reduce the diameter of the coil molded body 10 shown in FIG. 1 and introduce it into the existing pipe. The core material 20 is formed in a hollow cylindrical shape. However, it does not necessarily have to be a cylinder, and may be a polygonal hollow cylinder such as a quadrangle or a hexagon as long as the coil molded body 10 having a reduced diameter as shown in FIG.

  The cylindrical core member 20 shown in FIGS. 3 and 4 is made using, for example, a cylinder made of a metal such as iron. However, it is necessary to provide various components in the hollow portion, while ensuring the necessary strength, while maintaining the required strength. The appropriate place is removed. The outer diameter of the core material 20 is set to be smaller than the inner diameter of the coil molded body 10 when the diameter is reduced, for example, 200 to 600 mm, and the axial length thereof is larger than the length of the coil molded body 10 when the diameter is reduced. It is set long, for example, 400-800 mm.

  In this embodiment, the core member 20 includes three ring-shaped portions 22a, 22b, and 22c that are spaced apart in the axial direction and any number (five in the embodiment) of connecting portions 24 that connect them. In the embodiment, the width of the ring-shaped portion 22b at the rear end is set larger than the widths of the other two ring-shaped portions 22a and 22c.

  In the hollow portion of the core member 20, the entire length in the axial direction of the core member 20 extends from the ring-shaped portion 22 a at the front end to the ring-shaped portion 22 b at the rear end, and is fixed to the ring-shaped portions 22 a, 22 b and 22 c with bolts or the like. Two rails 26 and 28 are provided. The front end and the rear end of each rail 26 and 28 are formed as easy-access portions 30 that are expanded outward as they approach the tip, whereby warps 66 and 68 (FIG. 5) of the diameter expanding device 60 described later are formed. Easy access to rails 26 and 28 is provided. The rails 26 and 28 have a U-shaped cross section in the embodiment, and have side plates 26a and 28a at both ends in the width direction, respectively, and the side plates 26a and 28a are arranged around the sleds 66 and 68 mounted on the rails 26 and 28. Prevents movement and dropout in the direction.

  In the embodiment, the rails 26 and 28 each have an angle of 45 ° with respect to the vertical direction in order to ensure the running stability of the diameter expanding device 60 (FIG. 5) described later, that is, the core. If it says with the circular arc angle in the circumferential direction of the material 20, it will be provided in the position 90 degree apart, for example. However, the interval between the rails 26 and 28 is not limited to this.

  On the inner surface of the front-end ring-shaped portion 22a of the core member 20, the connection fittings 32 are fixed, for example, with bolts at positions facing away from each other by 180 °, for example. For example, the connection fitting 32 is formed in an L-shaped cross section, one side of the L-shape is fixed to the inner surface of the ring-shaped portion 22a, and a through hole 32a is formed on the other side of the L-shape.

  Similarly, on the inner surface of the rear end ring-shaped portion 22b of the core member 20, connecting metal fittings 34 are provided, for example, at opposing positions separated by 180 °. For example, the coupling metal 34 is formed in an L-shaped cross section, one side of the L-shape is fixed to the inner surface of the ring-shaped portion 22b, and a through hole 34a is formed on the other side of the L-shape.

  These connection fittings 32 and 34 cooperate with the connection member 90 (FIG. 7) in order to connect many core materials 20, as mentioned later.

  A coil molded body 10 shown in FIG. 1 is held on the core material 20 in a reduced diameter state at the front end ring-shaped portion 22a and the rear end ring-shaped portion 22b of the core material 20 at the intermediate position between the rails 26 and 28. Holding means or holding mechanisms 36a and 36b are provided.

The holding mechanisms 36a and 36b have angles 38a and 38b that are reverse U-shaped and both ends of the holding mechanisms 36a and 36b are bent outward. It is bolted to. A through hole (which may be a female screw) is formed in the flat part of the angles 38a and 38b, and bolts 40a and 40b are inserted into the through hole.

  The ends of the bolts 40a and 40b are screwed into nuts provided on the inner surfaces of the ring-shaped portions 22a and 22b, and then passed through through holes (not shown) formed in the ring-shaped portions 22a and 22b, respectively. And can protrude on the outer surface of 22c. Handles 42a and 42b are fixed to the rear ends of the bolts 40a and 40b. By turning the handles 42a and 42b, the bolts 40a and 40b can be projected and retracted on the outer surfaces of the ring-shaped portions 22a and 22b.

  The bolts 40a and 40b can be screwed into female screws 14a (and 14b) provided at both ends of the wire 12 of the coil molded body 10 shown in FIG.

  A contact rod 44 is attached to the intermediate ring-shaped portion 22c of the core member 20 so as to extend inward at an opposing position (in the embodiment) that is 180 ° apart. Since the diameter expanding device 60 of FIG. 5 moves in the hollow portion of the core material 20, the length of the hitting bar 44 is set shorter than the radius of the core material 20 in order to secure the movement space.

  The above-described rails 26 and 28 and the sleds 66 and 68 of the diameter expansion device 60 shown in FIG. 5 function in cooperation with each other as positioning means for the relative positions of the core member 20 and the diameter expansion device 60 in the circumferential direction. On the other hand, the contact rod 44 functioning as a locking member cooperates with the upright piece 74 of the diameter expanding device 60 shown in FIG. It functions as a positioning means for the relative position in the direction. Thus, since the relative position of the core material 20 and the diameter expansion device 60 is determined by the positioning means, the diameter expansion device 60 is reliable even if the core material 20 and the diameter expansion device 60 are configured separately. It can act on the required part of the core material 20. Furthermore, the positioning means positions the relative circumferential direction position and the relative axial direction position of the core member 20 and the diameter expansion device 60, so that the diameter expansion device 60 is a hollow of the core material 20 configured separately. Positioning can be performed reliably in the part. At this time, means (in the embodiment, rails 26 and 28 and sleds 66 and 68) for moving the diameter expansion device 60 in the axial direction within the hollow portion of the core member 20 are positioned relative to each other in the circumferential direction. Since it is also used as the means, it is not necessary to provide a special configuration as the circumferential positioning means.

  Guides 46 a, 46 b, and 46 c that can be projected and retracted on the outer surface of the ring-shaped portion 22 a of the core material 20 are provided at appropriate positions in the circumferential direction of the core material 20. On the other hand, guides 48a and 46b that can be projected and retracted on the outer surface of the ring-shaped portion 22b of the core member 20 are provided at positions corresponding to the guides 46a and 46b.

  The guides 46a and 48a are attached to both ends of the connecting rod 50a. The connecting rod 50a is constantly pushed inward in the radial direction of the core member 20 by the spring 52, and the outer peripheral inner surface of the core member 20 is fixed. Is attached. In this state, the guides 46a and 48a remain sunk inward from the outer surface of the ring-shaped portion 22a. And the guides 46a and 48a are made to protrude on the outer surface of the ring-shaped parts 22a and 22b by pushing the connecting rod 50a outward in the radial direction of the core member 20 against the elastic force of the spring 52.

  Similarly, the guides 46b and 48b are attached to both ends of the connecting rod 50b, and the connecting rod 50b is also constantly pushed radially inward by the spring 54. Therefore, the guides 46b and 48b are in a state of sinking inward from the outer surface of the ring-shaped portion 22b. And the guides 46b and 48b are made to protrude on the outer surface of the ring-shaped parts 22a and 22b by pushing the connecting rod 50b radially outward of the core member 20 against the elastic force of the spring 54.

  The guide 46c is provided only on the front end side of the core member 20, and the guide 46c is attached to the connecting rod 50c. The connecting rod 50 c is attached to the inner surface of the outer periphery of the core member 20 in a state where the connecting rod 50 c is constantly pushed inward in the radial direction of the core member 20 by the spring 56. In this state, the guide 46c sinks inward from the outer surface of the ring-shaped portion 22a. And the guide 46c is protruded on the outer surface of the ring-shaped part 22a by pushing the connection rod 50c to the radial direction outward of the core material 20 against the elastic force of the spring 56. FIG.

  The diameter expanding device 60 shown in FIG. 5 is for expanding the diameter of the coil molded body 10 by releasing both ends of the coil molded body 10 held in a reduced diameter state on the outer surface of the core member 20. It is. In the rehabilitation work for one section from the manhole to the manhole, a plurality of core members 20 are used, but only one diameter expansion device 60 is required.

  The diameter expanding device 60 includes a metal base plate 62. The width of the base plate 62 is set to a size that allows the hollow portion of the core member 20 to move. Locking tools 64 a and 64 b are fixed to the front end and the rear end of the base plate 62. By pulling the locking members 64a and 64b with, for example, a rope (not shown), the diameter expanding device 60 can be moved forward or backward.

  Below the base plate 62, sleds 66 and 68 are provided that extend outward at a predetermined angle at both ends of the base plate 62 in the width direction. The sleds 66 and 68 functioning as running members are held at the end of one mounting plate 67 fixed to the lower surface of the base plate 62, for example. By mounting the sleds 66 and 68 on the rails 26 and 28 of the core member 20 as described above, the diameter expanding device 60 can remain in the hollow portion of the core member 20, or the locking tool 64a or 64b is pulled. Thus, the inside of the hollow portion of the core member 20 can travel in the axial direction.

  Two air motors 70a and 70b each incorporating a speed reduction mechanism are installed on the inner side of the locking tools 64a and 64b on the base plate 62. The output shafts of the air motors 70a and 70b are below the base plate 62, respectively. The rotating plates 71a and 71b are fixed. The air motor is, for example, such a motor that rotates the rotor when compressed air supplied from an air supply port enters a chamber partitioned by vanes.

  The rotary plates 71a and 71b are flat rectangular plates, for example, and their upper surfaces are fixed to the rotary shafts of the air motors 70a and 70b. The upper ends of the rotating rods 72a and 72b are fixed to both ends of the lower surfaces of the rotating plates 71a and 71b. Therefore, when the air motors 70a and 70b are driven to rotate, the rotating plates 71a and 71b rotate in a horizontal plane, and accordingly the rotating rods 72a and 72b attached to the lower surface are spaced apart from each other by 180 ° about the motor shaft. Hold and rotate.

  The rotary rod 72a acts on the handle 42a on the front side of the core member 20 described above. When the diameter expanding device 60 is positioned at a predetermined position of the hollow portion of the core member 20, the rotary plate 71a is moved by the air motor 70a. Is rotated, the rotating rod 72a rotates, and the rotating rod 72a hits the side surface of the handle 42a. When the rotating plate 71a is further rotated in this state, the handle 42a is rotated by the rotating rod 72a.

  When the rotating rod 72a is rotated to the left, the handle 42a is also rotated to the left, so that the tip of the bolt 40a is detached from the female screw 14a of the coil molded body 10. That is, the screw engagement between the bolt 40a and the female thread 14a of the coil molded body 10 is released, and the front end side holding of the coil molded body 10 is released. When the rotating rod 72b is rotated to the left, the handle 42b is also rotated to the left, so that the tip of the bolt 40b is detached from the female screw 14b of the coil molded body 10. That is, the screw engagement between the bolt 40b and the female screw 14b of the coil molded body 10 is released, and the holding of the rear end side of the coil molded body 10 is released.

Therefore, the air motors 70a and 70b and the rotating rods 72a and 72b that are rotated by the air motors 70a and 70b and act on the handles 42a and 42b function as releasing means for releasing the holding of the coil molded body. Standing pieces 74 are provided at both ends in the width direction. The standing piece 74 has a U-shaped cross section, for example, includes a flat portion and a side plate that rises forward from both ends thereof, and the side plate is fixed to the front shaft 76. The shaft 76 is rotatably held by a holder 78 fixed on the base plate 62.

  A stopper 80 is provided on the base plate 62 behind the upright piece 74. The stopper 80 is, for example, an “L” -shaped metal fitting, and one side thereof is fixed to the base plate 62.

  A torsion spring 82 is attached to the shaft 76 to which the standing piece 74 is fixed. Therefore, the standing piece 74 is urged rearward by the torsion spring 82 until it comes into contact with the stopper 80. However, when the standing piece 74 is pushed from the stopper 80 side (rear side), the standing piece 74 falls against the elastic force of the torsion spring 82.

  In the hollow portion of the core member 20 shown in FIGS. 3 and 4, the contact rod 44 extends inward from both sides as described above. The height of the standing piece 74 when it stands is set to a height at which at least the upper end of the standing piece 74 hits the hitting bar 44. Therefore, when the diameter expanding device 60 moves from the rear to the front in the hollow portion of the core member 20, the upright piece 74 is raised by the torsion spring 82, so that the upper end of the front surface of the upright piece 74 is behind the contact rod 44. It hits. When the diameter expanding device 60 moves forward as it is, the upright piece 74 is in contact with the rear side of the hitting bar 44, so that the core member 20 also moves as the diameter expanding device 60 moves.

  Therefore, the hitting bar 44 and the upright piece 74 cooperate to function as positioning means for fixing the relative positions of the core member 20 and the diameter expanding device 60 in the axial direction, and as moving means for moving the core member 20. Also works.

  However, when the diameter expanding device 60 is moved from the front to the rear, the rear surface upper end of the upright piece 74 hits the hitting bar 44. However, when the contact force of the hitting bar 44 exceeds the elastic force of the torsion spring 82, the upright piece 74 Fall forward. Therefore, in this case, the upright piece 74 and the contact rod 44 are not engaged.

  That is, when the diameter expansion device 60 should be moved, the upright piece 74 falls down, so that the diameter expansion device 60 can freely move the hollow portion of the core member 20. On the other hand, when the axial positioning is necessary, for example, the standing piece 74 remains in contact with the contact rod 44, and the positioning can be reliably performed when necessary.

  On the base plate 62 of the diameter expanding device 60, two e-cylinders 84 a and 84 b that are arranged obliquely so as to intersect the “X” shape at the axial center portion, and the center in the width direction of the base plate 62 forward in the axial direction. One air cylinder 84c upright is provided. The tip ends of the piston rods of these air cylinders 84a, 84b and 84c are arranged so as to act on the connecting rods 50a, 50b and 50c of the core member 20 described above. For example, when air is supplied from the air supply port (not shown) to the rear of the piston of the air cylinder 84a, the piston rod is pushed forward, whereby the connecting rod 50a is pushed and fixed to the connecting rod 50a. The guides 46a and 48a are pushed up. Therefore, the guides 46 a and 48 a protrude on the outer surface of the core member 20. Similarly, when air is supplied to the rear of each piston of the air cylinders 84b and 84c, the piston rod pushes the connecting rods 50b and 50c, so that the guides 46b and 46c fixed to the connecting rods 50b and 50c Projects on the outer surface.

  In this way, the guides 46a, 46b, 46c, 48a, 48b of the core material 20 can be operated by the diameter expanding device 60, so that it is necessary even after the core material 20 is introduced into the existing pipe 100 (described later). The guides 46a-46c and 48a-48b can be made to appear and disappear reliably.

  The guides 46a, 46b and 46c are front end side guides (first guides) for determining the front end of the coil molded body 10 having a reduced diameter on the outer surface of the core member 20, as shown in FIG. The guides 48a and 48b are also rear end side guides (second guides) for determining the rear end of the coil molded body 10. The guides 48a and 48b are used when the coil molded body 10 is expanded in diameter. This is to prevent the rear end of 10 from swinging (raising).

  As described with reference to FIG. 1, the length L2 of the coil molded body 10 when the diameter is reduced is longer than the length L1 when the diameter is increased. Accordingly, when the diameter of the coil molded body 10 is increased, the rear end of the coil molded body 10 moves forward by a distance (L2-L1). If the guides 48a and 48b are disposed at the rear end of the coil molded body 10 when the diameter is reduced, as with the guides 46a-46c, the rear end guides 48a and 48b are disposed behind the coil molded body 10 after the diameter expansion. As a result, the guides 48a and 48b do not function as rear end restrictions when the diameter of the coil molded body 10 is increased.

  Therefore, in this embodiment, as shown in FIG. 6, the positions of the guides 48 a and 48 b are arranged at positions that are predicted to become the rear end of the coil molded body 10 when the diameter is expanded. In other words, the coil formed body 10 at the time of diameter reduction is disposed forward by the distance (L2-L1) from the rear end. Then, the guides 48a and 48b are positioned at the rear end position when the coil molded body 10 is expanded, and the guides 48a and 48b swing the rear end of the coil molded body when the coil molded body 10 is expanded. Can be regulated or suppressed.

  As shown in FIG. 7, adjacent core materials 20, that is, the preceding core material 20 and the subsequent core material 20 are connected by a connecting member 90 when they are drawn together into the existing pipe 100 (FIG. 8). .

  In the embodiment shown in FIG. 7, the connecting member 90 is constituted by an IT hanger. The IT hanger or connecting member 90 includes a screw body 92 and a rotating plate 96 that is rotatably supported by a shaft 94 at the tip of the screw body 92 and has the same diameter as the screw body 92. In this embodiment, furthermore, a collar 98 made of metal or plastic is put over the screw body 92 and the rotating plate 96, so that the rotating plate 96 is in the unconnected state shown in FIG. It is held in a straight line state (alphabet “I” shape) on the 92 axes.

  The screw main body 92 is inserted into the through hole 34a (FIG. 4) of the connection fitting 34 provided at the rear end of the hollow portion of the preceding core member 20, and nuts are screwed into the screw portions from both sides of the connection fitting 34. Thereby, the screw main body 92 is firmly fixed to the connecting fitting 34 at the rear end of the preceding core member 20.

  When the succeeding core member 20 is connected to the preceding core member 20, as shown in FIG. 7B from the state of FIG. 7A, the hollow portion of the core member 20 followed by the rotation plate 96 of the connecting member 90 is used. The subsequent core member 20 is brought close to the preceding core member 20 so as to be inserted through the through hole 32a (FIG. 3) of the connection fitting 32 provided at the front end. At this time, the collar 98 is pushed onto the front surface of the connection fitting 32 and moves onto the screw body 92.

  When the rotating plate 96 of the connecting member 90 passes through the through hole 32a of the connecting member 32 of the core member 20 that follows, the rotating plate 96 rotates by its own weight and is perpendicular to the screw main body 92, that is, the alphabet “T It becomes a state of "". Accordingly, the rotating plate 96 of the connecting member 90 that is rotated vertically is engaged with the connecting fitting 32 of the core member 20 that follows. That is, the preceding core member 20 and the subsequent core member 20 are connected by the connecting member 90.

  In this embodiment, the front end side connection fitting 32 and the rear end connection fitting 34 of the core member 20 are both spaced apart in the circumferential direction as described above (opposed at 180 ° in the embodiment). Provided one by one. Therefore, when the two connecting metal fittings 34 of the preceding core material and the two connecting metal fittings 32 of the following core material are connected by the connecting member 90, the preceding core material 20 follows by the connection at two locations in the circumferential direction. The core material 20 is not restrained and displaced in the circumferential direction. Therefore, the preceding core rails 26 and 28 and the following core rails 26 and 28 are straight, so that a straight line can be formed and the diameter expanding device 60 can be stably run on the rails.

  As described above, the preceding connecting member 34 of the core material and the connecting member 90 (the screw main body 92) are firmly fixed. Therefore, it can be said that the preceding core member 20 and the connecting member 90 are connected with rigidity. On the other hand, the connecting member 32 and the connecting member 90 of the subsequent core member are flexible with respect to the connecting member 90 because the screw main body 92 is only loosely inserted through the through hole 32a of the connecting member 32. It can be said that they are connected. Therefore, the connecting member 90 can be displaced in the radial direction of the through hole 32a with respect to the through hole 32a of the connecting metal 32, and the connecting metal 32 and the connecting member 90 have a certain length in the axial direction (the length of the connecting member 90). It is relatively displaceable. That is, in this embodiment, the preceding core connecting metal 34 and the connecting metal 90 are not relatively displaced, but the subsequent core connecting metal 32 and the connecting member 90 are relatively displaceable.

  The coil molded body 10 shown in FIG. 1A is laid in the existing pipe 100 shown in FIG. 8 using the core member 20 and the diameter expanding device 60 described above.

  As shown in FIG. 8, the existing pipe 100 such as a fume pipe is buried in the ground between the first manhole 102 and the second manhole 104 (one section). A roller 106 is temporarily installed in the first manhole 102, and the rope 108 is tied to a winch (not shown) installed on the ground via the roller 106. The roller 106 can be temporarily installed in the first manhole 102 by, for example, a method in which the roller 106 is provided on a member hooked on the upper end opening edge of the first manhole 102. A leading conduit 110 is connected to the rear end of the rope 108, for example, in the second manhole 104, and the leading conduit 110 is introduced from the second manhole 104 into the existing pipe 100.

  A core material 20 that is held on the outer surface in a state where the diameter of the coil molded body 10 is reduced as shown in FIG. Then, the rope 108 is pulled in the direction of arrow A (FIG. 9), that is, in the direction of the first manhole 102 by a winch (not shown). In response, first, the leading conduit 110 and one core member 20 connected thereto are drawn into the existing pipe 100 from the manhole 104.

  Before or after the first core member 20 is introduced into the existing pipe 100, as described with reference to FIG. 7, for example, an IT hanger fixed to the connecting fitting 34 on the rear end side of the first core member 20. The first core member 20 and the second core member 20 are connected in, for example, the second manhole 104 by connecting the connecting member 90 as described above to the connecting fitting 32 on the front end side of the subsequent core member 20. .

  Thereafter, similarly, before or after the preceding core member 20 is introduced into the existing pipe 100, a connecting member 90 such as an IT hanger fixed to the connecting bracket 34 on the rear end side of the core member 20 is provided. The preceding core member 20 and the following core member 20 are connected, for example, in the second manhole 104 by connecting to the connecting fitting 32 on the front end side of the subsequent core member 20. By repeating such a connecting operation, as shown in FIGS. 11 and 12, a plurality of core members 20 (holding the coil molded body 10) are pulled by pulling the rope 108 from the first manhole 102 side. Is drawn into the existing pipe 100 from the second manhole 104 side.

  At this time, the rear end connecting bracket 34 and the connecting member 90 of the preceding core member 20 are connected with rigidity, but the front end connecting bracket 32 and the connecting member of the subsequent core member 20 are connected with flexibility. Has been. Therefore, when the core members 20, 20,... Connected by the connecting member 90 are pulled by the rope 108, the front end of the subsequent core member can easily follow the rear end of the preceding core member. Therefore, for example, even if there is, for example, an ascending step between the site of the existing pipe 100 where the preceding core material 20 exists and the site where the subsequent core material 20 exists, the front end of the subsequent core material is the leading core. Since it is pulled up by the connecting member 90 that is firmly connected to the rear end connecting bracket 34 of the material, the subsequent core material can easily exceed the ascending step.

  However, the connecting method by the connecting member 90 is not limited to the method of the embodiment in which the connecting member 90 is rigidly connected to the preceding core member and is connected to the subsequent core member with flexibility. A method of connecting both the core material and the subsequent core material with flexibility may be employed.

  What is important is that a member having high rigidity is used between the connecting members 34 and 32, such as the connecting member 90 (IT hanger) in the embodiment of FIG. Then, even if the connecting member 90 is connected to the connecting fittings 34 and 32 in a flexible manner, the front end of the subsequent core member can follow the rear end of the preceding core member. In addition, even if the existing pipe 100 is partially swung from side to side, the subsequent core material can be easily drawn beyond that part.

  As shown in FIG. 9, by connecting a new core material to the preceding core material and pulling the rope 108, a large number of core materials 20 that hold the coil molded body 10 and are connected are continuously formed in the existing pipe 100. Be drawn into. Then, as shown in FIG. 10, the core material 20 loaded with the reduced diameter coil formed body 10 is drawn in the state of being connected by the connecting member 90 over the entire length of the existing pipe 100, that is, in all one section.

  Thereafter, the roller 112 is also temporarily installed in the second manhole 104, and the tip of the rope 114 is brought into the first manhole 102 through the hollow portion of each core member 20 from the second manhole 104. And in the 1st manhole 102, the front-end | tip of the rope 114 is latched to the locking tool 64b of the rear-end side of the diameter expanding apparatus 60 as shown in FIG. By pulling in the B direction, that is, in the direction of the second manhole 104, the diameter expanding device 60 is drawn from the rear end side into the hollow portion of the core material 20 at the head (closest to the first manhole 102 side).

  FIG. 12 shows a state in which the diameter expansion device 60 is placed in the hollow portion of the core member 20 holding the coil molded body 10 having a reduced diameter on the outer surface, FIG. 12 (a) is a perspective view, and FIG. FIG. 12B is a view seen from the left side, and FIG. 12C is a view showing the inside of the core material 20 cut along the line XIIC-XIIC in FIG.

  In order for the diameter expanding device 60 to act on the core material 20 to expand the diameter of the coil molded body 10, the circumferential positioning means (in the embodiment, rails 26 and 28 and sleds 66 and 68 in the embodiment) In the hollow portion, the diameter expansion device 60 is positioned at an appropriate relative position in the circumferential direction with respect to the core material 20, and the core material 20 is hollowed by the axial positioning means (the hitting bar 44 and the standing piece 74 in the embodiment). The diameter expanding device 60 needs to be positioned at an appropriate axial relative position with respect to the core member 20 in the portion.

  Circumferential positioning can be achieved by entering sleds 66 and 68 on rails 26 and 28.

  For the positioning in the axial direction, first, the diameter expansion device 60 is pulled by the rope 114 and moved in the direction of the second manhole 104, and the contact bar 44 is passed in a state where the standing piece 74 is tilted, and then the diameter expansion device 60 is moved. This can be achieved by pulling the diameter expansion device 60 with the rope 114 and moving it in the direction of the first manhole 102 until the upper standing piece 74 hits the contact rod 44 of the core member 20.

  When the proper relative position is determined, the tips of the piston rods of the air cylinders 72a, 72b and 72c of the diameter expansion device 60 are positioned at positions where they can act on the connecting rods 50a, 50b and 50c of the core member 20. . Therefore, when air is supplied to the air supply ports of the air cylinders 72a and 72b, the connecting rods 50a and 50b are pushed against the elastic force of the springs 52 and 54, and the guide 46a fixed to the connecting rods 50a and 50b. , 48 a and 46 b, 48 b protrude on the outer surface of the core member 20. Further, when air is supplied to the air supply port of the acylinder 72c, the connecting rod 50c is pushed against the elastic force of the spring 56, and the guide 46c fixed to the connecting rod 50c protrudes on the outer surface of the core member 20. .

  That is, the guides 46a, 46b, and 46c are in contact with the front end of the coil molded body 10 held on the core member 20, and are also inside the rear end of the coil molded body 10 (depending on the above-described distance (L2-L1)). )), The guides 48a and 48b protrude. Next, the diameter of the coil molded body 10 on the core material 20 is expanded.

  When the diameter expanding device 60 is properly positioned with respect to the core member 20, the rotating rods 70a and 70b of the diameter expanding device 60 are present at the positions of the handles 42a and 42b of the core member 20, as shown in FIG. Then, by rotating the handles 42a and 42b with the rotating rods 70a and 70b, the coil molded body 10 is released from the core member 20 and expanded in diameter.

  The diameter of the coil molded body 10 is expanded in the order of first releasing (holding) the rear end side and then releasing (holding) the front end side.

  Therefore, first, when the air motor 66b is rotated to rotate the rotating rod 70b to the left, the rotating rod 70b hits the side surface of the handle 42b, and the handle 42b, that is, the bolt 40b to which the handle 42b is fixed is rotated counterclockwise. Therefore, the bolt 40b is dropped from the female screw 14b of the coil molded body 10, and the fixing and holding on the core member 20 at the rear end of the coil molded body 10 are released. At this time, the guides 48 a and 48 b can suppress the “rambling” of the rear end of the coil molded body 10.

  Next, when the air motor 66a is rotated to rotate the rotating rod 70a counterclockwise, the rotating rod 70a hits the side surface of the handle 42a, and the handle 42a, that is, the bolt 40a to which the handle 42a is fixed is rotated counterclockwise. Therefore, the bolt 40a is dropped from the female screw 14a of the coil molded body 10, and the fixing and holding on the core member 20 at the front end of the coil molded body 10 are released.

  In this way, by releasing the fixing (holding) at both ends of the coil molded body, the coil molded body 10 changes from the reduced diameter state of FIG. 1 (b) to the state of FIG. 1 (a) by its own elasticity. The diameter is expanded. As described above, since the outer diameter of the coil molded body 10 at the time of diameter expansion is slightly larger than the inner diameter of the existing pipe, the expanded coil molded body 10 has the core material 20 that holds it. In the place where there is, the outer periphery of the coil molded body 10 is laid so as to be in close contact with the inner surface of the existing pipe 100. That is, the diameter of the coil molded body 10 can be easily increased and laid by the diameter expansion device 60.

  It should be noted that the rear end side of the coil molded body that is released first is still unreleased by providing a time difference so that the rear end side of the coil molded body 10 is first released and then the front end side is released. It is drawn toward the fixed front end. Therefore, if the positioning of the front end side of the coil molded body is reliably performed, the coil molded body can be laid in the existing pipe without a gap.

  In this way, the coil molded body 10 is released from the leading core material 20 of the core material 20 drawn continuously over the entire length of one section, and the coil molded body 10 is moved to its position as shown in FIG. Stay on.

  As shown in FIG. 13, a state in which the diameter of the coil formed body 10 is released from the preceding core material 20 and the diameter thereof is expanded is shown in FIG. In FIG. 14A, it can be seen that the outer surface of the coil molded body 10 which has been released from the preceding core member and has an enlarged diameter is laid in close contact with the inner surface of the existing pipe 100. At that time, the rear end of the coil molded body 10 is regulated by the rear end side guide 48b (and 48a) and is in front of it. The core material 20 holding the expanded coil molded body remains in its original position. The succeeding core member 20 is connected to the preceding core member 20 by a connecting member 90, and the coil molded body 10 is reduced in diameter and held on the subsequent core member 20.

  Next, the coil molded body 10 is released from the subsequent core material 20 and expanded in diameter, but when the diameter of the coil molded body 10 on the subsequent core material 20 is expanded in the state shown in FIG. The gap between the front end of the unexpanded coil formed body 10 and the rear end of the expanded coil formed body is widened. This is because when the diameter of the coil molded body is increased, the rear end is first released, and the front end side whose position is regulated by the front end side guides 46b and 46c (and 46a) does not move.

  Therefore, in this embodiment, after releasing the coil formed body from the preceding core member 20 and expanding the diameter, as shown in FIG. 14B, the rear end of the coil formed body whose diameter has been increased and the subsequent core The gap with the front end of the coil molded body 10 in a reduced diameter state on the material 20 is narrowed.

  Specifically, from the state of FIG. 14 (a), by pulling the rope 108 from the first manhole 102 side, the guides 46 and 46c (46a) on the subsequent core material 20 have been expanded in diameter. The preceding core material that has held the expanded coil formed body is brought toward the first manhole 102 together with the subsequent core material connected thereto until it abuts the rear end 10. That is, after releasing the coil molded body from the preceding core material and expanding the diameter, the subsequent core material holding the coil molded body not expanded in diameter is aligned in the axial direction.

  As described above, since the connecting member (IT hanger) 90 and the connecting fitting 32 are connected so as to be relatively displaceable in the axial direction, first, when pulling the subsequent core member toward the first manhole 102, Only the subsequent core material moves and approaches the preceding core material, and then the preceding core material and the subsequent core material are drawn toward the first manhole 102 together.

  When the alignment of the subsequent core material 20 is performed, the preceding core material 20 that has already released the diameter of the coil molded body 10 is pushed by the subsequent core material 20 as shown in FIG. The leading portion enters the first manhole 102.

  However, before the alignment shown in FIG. 14B, the diameter expanding device 60 is pulled from the second manhole 104 side by the rope 114 as shown in FIG. It moves to the hollow part of the core material holding the coil molded body which expands in diameter. At this time, the diameter expanding device 60 moves on the rails 26 and 28 by the sleds 66 and 68.

  After the alignment shown in FIG. 14B, the diameter expanding device 60 is pulled from the second manhole 104 side by the rope 114 as shown in FIG. It moves in the hollow part of the core material holding the coil molded body. At this time, the diameter expanding device 60 moves on the rails 26 and 28 by the sleds 66 and 68.

  After that, in the state of FIG. 15, the coil molded body 10 is released from the (second) core material 20 following the preceding (first) core material by the method described above with reference to FIG. To expand the diameter.

  Then, the step of aligning the subsequent core material and the step of expanding the diameter of the coil formed body on the subsequent core material described with reference to FIG. 14 are repeatedly executed, and finally the first All coil molded bodies in one section from the manhole 102 to the second manhole 104 are expanded in diameter. This state is shown in FIG.

  In order to expand the diameter of the coil molded body on the second core material from the top and then expand the diameter of the coil molded body on the third core material, the third core material is already removed from the second core material. When aligning with the rear end of the expanded coil molded body, the leading core member is pushed by the second core member and comes out into the first manhole 102. Therefore, if the connection between the leading core material and the second core material by the connecting member 90 is released, the leading core material can be recovered from the upper opening of the first manhole 102 to the ground.

  Thereafter, similarly, the emptied core material may be sequentially taken out from the first manhole 102. That is, every time the subsequent core material is aligned, the empty core material is collected on the ground.

  In FIG. 16, the last core member 20 is pulled up from the first manhole 102, the diameter expanding device 60 is pulled up from the second manhole 104, and the coil molded body laying process is completed.

  According to the above-described embodiment, since the diameter expanding device 60 is configured separately from the core material 20, the plurality of core materials 20 that hold the coil molded body 10 with a reduced diameter are provided in the existing pipe 100. Then, the coil formed body 10 on each core member 20 can be expanded using the same diameter expanding device 60. Therefore, only one diameter expansion device is required, which is economical. And since the several core material 20 holding the coil molded object 10 in which each diameter was reduced can be prepared previously, a coil molded object laying process can be performed efficiently.

  Thereafter, as shown in FIG. 17, the lining material 18 shown in FIG. 2 is lined on the inner surface of the coil molded body laid in the existing pipe 100. Specifically, as shown in FIG. 2B, for example, a lining material 18 folded into a heart shape is introduced into the inside of a coil molded body, and high-temperature and high-pressure steam is pumped into the lining material 18 to thereby form a lining material. The lining material 18 restored to a tubular shape is laid on the inner surface of the coil molded body 10 by utilizing the shape memory characteristics of 18.

  That is, the rehabilitation of the existing pipe 100 is performed by performing the coil molded body laying process of FIGS. 8 to 16 and the subsequent lining process shown in FIG. FIG. 17 shows a rehabilitated pipeline in which a coil molded body is laid in an existing pipe and a lining material is lined.

  In the coil forming body laying method according to the embodiment described above, a plurality of connected core members 20 each holding the coil forming body 10 with a reduced diameter are connected to each other by a connecting member 90 so that the existing pipe is formed at a time. Then, the coil molded body on each core material is sequentially expanded in diameter while aligning the subsequent core material. At this time, when the diameters of the respective coil molded bodies are sequentially expanded, the core material emptied from the first manhole 102 is sequentially recovered to the ground. In order to recover the empty core material, each time the connecting member 90 is recovered. The core must be removed and pulled up to the ground, making it difficult to collect the core material. For example, it is necessary to have an operator stand by on the ground in the first manhole 102 or in the vicinity of the upper opening of the first manhole 102 in order to collect the core material.

  On the other hand, in the coil molded body laying method according to another embodiment of the present invention described next with reference to FIGS. 18 to 27, the diameter of the coil molded body is reduced as described below. The core material to be held is drawn into the existing pipe, and the process of sequentially expanding the diameter of the coil molded body on each core material and the process of collecting the empty core material are executed in a time-sharing manner. The worker who has done the work of the diameter only needs to perform the work for collecting the core material next, and there is no need to keep the extra workers on standby.

  In FIG. 18 and subsequent figures, only a total of 10 coil molded bodies are laid between the first manhole 102 and the second manhole 104. This is applied to the existing pipe 100 as shown in FIGS. This is because drawing the “break line” makes it difficult to understand the spirit of this embodiment. Actually, as in the previous embodiment, a large number of coil molded bodies are laid between the first manhole 102 and the second manhole 104.

  In other embodiments, first, as shown in FIG. 18 and FIG. 9, in the same manner as in FIGS. 8 and 9, the diameter of the leading end of the leading conduit 110 drawn from the first manhole 102 side by the rope 108 is reduced. A core material 20 (in the following, indicated by the reference numeral “20a1” for convenience) holding the coil molded body 10 (hereinafter, indicated by the reference numeral “10a1” for convenience) is connected to the second. Pull in from manhole 104. However, at this time, the diameter expanding device 60 is introduced in advance into the hollow portion of the core member 20a1 following the leading conduit 110 so that the front end is on the first manhole 102 side and the rear end is on the second manhole 104 side. deep. That is, the sleds 66 and 68 of the diameter expanding device 60 are placed on the rails 26 and 28 of the core member 20a1. Then, the rope 114 is locked to both the locking tools 64a and 64b (FIG. 5) of the diameter expanding device 60. However, the roller 111 is also temporarily installed in the first manhole 102 for the rope 114.

  Subsequently, in the second manhole 104, the core material 20 (hereinafter, denoted by reference numeral “10a2” for convenience) holding the succeeding reduced-diameter coil molded body 10 on the leading core material 20a1. Hereinafter, for the sake of convenience, the reference numeral “20a2” is indicated by a connecting member 90 (FIG. 7), the rope 108 is pulled from the first manhole 102, and the subsequent core member 20a2 is placed in the existing pipe 100. Pull in. Thereafter, the cores 20a3, 20a4 (holding the reduced-diameter coil molded bodies 10a3, 10a4) are connected sequentially, and the rope 108 is pulled from the first manhole 102 side to connect the cores 20a3, 20a4. Are sequentially drawn from the second manhole 104 into the first section S1 of the existing pipe 100.

  However, in this embodiment, as shown in FIG. 18, the core material is not drawn into the entire section from the first manhole 102 to the second manhole 104 at a time, and the first manhole 102 and the second manhole 104 Of the predetermined intervals in between, the core material is drawn only into one half (on the second manhole 104 side) of the half section S1 (this section is referred to as “first section”). Of the predetermined section between the first manhole 102 and the second manhole 104, the core material is drawn into the other section S2 of the other (on the first manhole 102 side) (this section is referred to as “second section”). Absent.

  Then, as shown in FIG. 19, among the plurality of core members 20 drawn into the first section S1, the coil molded body 10a1 is released from the leading core member 20a1 to increase the diameter. At this time, the diameter expanding device 60 exists in the hollow portion of the core member 20a1, but when the rope 114 is pulled from the second manhole 104, the standing piece 74 (FIG. 5) of the diameter expanding device 60 is hit by the hitting rod 44 (FIG. 3). 4) once in the direction of the second manhole 104, and until the front end of the upright piece 74 hits the rear end of the contact rod 44 of the core member 20, as described above with reference to FIG. By pulling the rope 114 from the first manhole 102 side, the relative position in the axial direction between the core member 20a1 and the diameter expanding device 60 is determined.

  Then, the air motor 70b (FIG. 4) is driven to remove the bolt 40b from the female screw 14b at the rear end of the coil molded body 10a1, the fixing of the rear end of the coil molded body 10a1 is released, and then the air motor 70a is driven. The bolt 40a is removed from the female screw 14a at the front end of the coil molded body 10a1, and the fixing of the front end of the coil molded body 10a1 is released. That is, first, the coil molded body 10a1 is released from the leading core member 20a1 to increase the diameter. As shown in FIG. 19, the coil molded body 10 a 1 having an enlarged diameter is laid in close contact with the inner surface of the existing pipe 100.

  Next, the rope 114 is pulled from the second manhole 104, and the diameter expanding device 60 is drawn onto the rails 26 and 28 of the core member 20a2.

  Thereafter, as described above with reference to FIG. 14 (b), in the step of FIG. 20, on the core member 20a2 following the rear end of the coil molded body 10a1 that has been released from the leading core member 20a1 and has been expanded. The subsequent core material 20a2 is aligned by pulling the rope 108 from the first manhole 102 side so that the front end of the coil molded body 10a2 held by the core 10a2 comes into contact. Then, the rope 114 is further pulled from the second manhole 104 so that the standing piece 74 once passes the hitting rod 44. Then, the rope 114 is pulled from the first manhole 102 to bring the upright piece 74 into contact with the hitting bar 44. The coil molded body 10a2 is released and expanded in diameter from the subsequent core material 20a2 aligned in this way.

  As described above with reference to FIG. 1, the coil molded body 10 has the length L2 when the diameter is increased compared to the length L1 when the diameter is reduced, and thus the second manhole 104 in the first section S1. A margin (empty space) is generated on the side. Therefore, as shown in FIG. 21, another core member 20a5 is connected to the last core member 20a4 in the second manhole 104. Therefore, when the rope 108 is drawn, the other core member 20a5 is also drawn into the first section S1 of the existing pipe 100. Thereafter, the subsequent core members 20a3, 20a4, and 20a5 are aligned, and the coil molded bodies 10a3, 10a4, and 10a5 are repeatedly released and expanded in diameter.

  In this manner, the diameters of the coil molded bodies 10a1-10a5 on all the core members 20a1-20a5 drawn into the first section S1 are expanded. Thereby, as shown in FIG. 22, five coil molded bodies 10a1-10a5 are laid in the first section S1.

  Thus far, the core material pull-in and coil molded body diameter expanding steps in the first section S1 are completed.

  In the state shown in FIG. 22, the diameter-enlarged coil molded body 10a1-10a5 is laid in the first section S1 of the existing pipe 100, and the coil molded body 10a1-10a5 in the first section S1 is installed in the second section S2. There are empty core members 20a1 to 20a5 that are drawn into the second section S2 when the diameter is expanded.

  Therefore, in the next step shown in FIG. 23, the five core members 20a1-20a5 accumulated in the second section S2 are collected from the first manhole 102 to the ground. That is, the ropes 108 sequentially draw the empty core materials 20a1 to 20a5 into the first manhole 102, release the connection with the subsequent empty core materials by the connecting member 90, and enter the ground from the upper end opening of the first manhole 102. Pull up. However, the leading conduit 110 is recovered from the first manhole 102 to the ground at an appropriate timing before that.

  As described above, in this embodiment, the core material recovery step can be performed independently in time after the drawing of the core material and the diameter expansion process of the coil molded body in the first section S1. Therefore, it is more efficient than the previous embodiment in which the diameter of the coil molded body and the recovery of the core material are alternately performed, and the two processes can be performed in a time-sharing manner. As a result, laying costs can be saved.

  This state is shown in FIG. As can be seen from FIG. 23, the coil molded body is laid in the first section S1 of the existing pipe 100, but the coil molded body is not yet laid in the second section S2.

  After all the empty core materials 20a1-20a5 are collected from the second section S2 in FIG. 22, the roller 106 is temporarily installed in the second manhole 104 as shown in FIG. Pull the rope 108 from the manhole 104. The leading conduit 110 is connected to the rope 108 in the first manhole 102, and the leading, reduced-diameter coil molded body 10 is connected to the leading conduit 110 (in the following, for the sake of convenience, it is indicated by the reference numeral “10b1”). Are connected to each other and are drawn from the first manhole 102 by connecting the core material 20 (hereinafter, indicated by the reference numeral “20b1” for convenience). However, at this time, the diameter expansion device 60 is introduced in advance into the hollow portion of the core member 20b1 following the leading conduit 110 so that the front end is on the second manhole 104 side and the rear end is on the first manhole 102 side. deep. That is, the sleds 66 and 68 of the diameter expanding device 60 are placed on the rails 26 and 28 of the core member 20b1. Then, the rope 114 is locked to both the locking tools 64a and 64b (FIG. 5) of the diameter expanding device 60. At this time, the diameter expansion device 60 can use the same thing utilized previously for diameter expansion of the coil molded object 10 in 1st area S1. However, the roller 111 for the rope 114 is installed in the second manhole 104 and the roller 112 is installed in the first manhole 102.

  Subsequently, in the first manhole 102, the core material 20 (hereinafter, referred to by reference numeral “10b2” for the sake of convenience) holding the subsequent reduced-diameter coil molded body 10 on the leading core material 20b1. Hereinafter, for the sake of convenience, the reference numeral “20b2” is indicated by a connecting member 90 (FIG. 7), the rope 108 is pulled from the second manhole 104, and the subsequent core member 20b2 is placed in the existing pipe 100. Pull in. Hereinafter, the cores 20b3 and 20b4 (holding the reduced-diameter coil molded bodies 10b3 and 10b4) are connected sequentially, and the rope 108 is pulled from the second manhole 104 side to connect the cores 20b3 and 20b4. Are sequentially drawn from the first manhole 102 into the second section S2 of the existing pipe 100.

  Then, as shown in FIG. 25, the coil molded body 10b1 is released from the leading core material 20b1 among the plurality of core materials 20 drawn into the second section S2, and the diameter is expanded. At this time, the diameter expanding device 60 is present in the hollow portion of the core member 20b1, but the rope 114 is pulled from the first manhole 102 so that the standing piece 74 (FIG. 5) of the diameter expanding device 60 is hit by the hitting rod 44 (FIG. 3). 4) once in the direction of the first manhole 102, and then, as described above with reference to FIG. 12, until the front end of the standing piece 74 hits the rear end of the contact rod 44 of the core member 20, By pulling the rope 114 from the second manhole 104 side, the relative position in the axial direction between the core member 20b1 and the diameter expanding device 60 is determined.

  Then, in the same manner as described above, the fixing of the rear end of the coil molded body 10b1 is released, and then the fixing of the front end of the coil molded body 10b1 is released. That is, first, the coil molded body 10b1 is released from the leading core member 20b1 to increase the diameter. As shown in FIG. 25, the coil formed body 10b1 whose diameter has been enlarged is laid in close contact with the inner surface of the existing pipe 100.

  Next, the rope 114 is pulled from the first manhole 102, and the diameter expanding device 60 is drawn onto the rails 26 and 28 of the core member 20b2.

  Thereafter, as described above with reference to FIG. 14B, in the step of FIG. 26, on the core member 20b2 following the rear end of the coil molded body 10b1 that has been released from the leading core member 20b1 and has been expanded. The subsequent core material 20b2 is aligned by pulling the rope 108 from the second manhole 104 side so that the front end of the coil molded body 10b2 held on the abutment is in contact. That is, the rope 114 is further pulled from the first manhole 102 so that the standing piece 74 once passes the hitting rod 44. Then, the rope 114 is pulled from the second manhole 104 and the upright piece 74 is brought into contact with the contact rod 44. The coil molded body 10b2 is released from the subsequent core material 20b2 aligned in this manner and the diameter thereof is increased.

  By expanding the diameters of the coil molded bodies 10b1 and 10b2, an empty space is created on the first manhole 102 side in the second section S2, so that the first manhole 102 is formed in the last core member 20b4 as shown in FIG. The other core material 20b5 is connected at. Therefore, when the rope 108 is drawn, the other core member 20b5 is also drawn into the second section S2 of the existing pipe 100. Thereafter, the subsequent core members 20b3, 20b4, and 20b5 are aligned, and the coil molded bodies 10b3, 10b4, and 10b5 are repeatedly released and expanded in diameter.

  In this way, the diameters of the coil molded bodies 10b1-10b5 on all the core members 20b1-20b5 drawn into the second section S2 are expanded. As a result, as shown in FIG. 28, five coil molded bodies 10b1-10b5 are also laid in the second section S2.

  In the state of FIG. 28, the diameter-expanded coil molded body 10b1-10b5 is laid in the second section S2 of the existing pipe 100, and the coil molded body 10 already laid in the first section S1 includes the second section S2. There is an empty core material 20b1-20b5 that is drawn into the first section S1 when the diameter of the coil molded body 10b1-10b5 in the section S2 is expanded.

  Therefore, in the next step shown in FIG. 29, the five core members 20b1-20b5 accumulated in the first section S1 are collected from the second manhole 104 to the ground. That is, the rope 108 sequentially pulls the empty core material 20b1-20b5 into the second manhole 104, releases the connection with the subsequent empty core material by the connecting member 90, and then goes from the upper end opening of the second manhole 104 to the ground. Pull up. However, the leading conduit 110 is recovered from the second manhole 104 to the ground at an appropriate timing before that.

  Thus, also in 2nd area S2, the collection | recovery process of a core material can be performed independently temporally after the drawing-in of a core material and the diameter expansion process of a coil molded object.

  After laying the coil molded body 10 in the existing pipe 100 in a predetermined section between the first manhole 102 and the second manhole 104 as shown in FIG. 28, in the last step shown in FIG. Is laid inside the coil molded body 10.

  Furthermore, in any of the above-described embodiments, each time the core material holding the coil molded body in a reduced diameter state is drawn into the existing pipe 100, each time in the first manhole 102 or the second manhole 104, The core material to be connected is connected to the preceding core material by a connecting member 90.

  However, before drawing into the existing pipe 100 through the first manhole 102 or the second manhole 104, a plurality of core members (all holding a coiled body having a reduced diameter) may be connected on the ground. . By doing so, it is not necessary to connect the following core material in the manhole each time a plurality of core materials are drawn into the existing pipe 100, and the plurality of core materials can be drawn into the existing pipe more efficiently. However, when connecting a plurality of core materials on the ground in this way and carrying the connected core materials into the manhole from the ground, the longer the interval between the core materials is easier to handle, the connection member 90 is Longer is better. On the other hand, when pulling into the existing pipe from the manhole, the shorter the interval between the core members is easier to handle, so the connecting member 90 should be relatively short.

  Therefore, in order to satisfy such a requirement, for example, a connecting member 90 that can extend and contract as shown in FIG. 30 is used.

  The connecting member 90 shown in FIG. 30 is formed in an elongated flat plate shape as a whole, a hole 91 is formed on one end side, and a long hole 93 extending from the other end side to the one end side is formed.

  A method of connecting the connecting brackets 34 and 32 using such a connecting member 90 is shown in FIG.

  Referring to FIG. 31, the “L” -shaped auxiliary metal fitting 34 </ b> A is connected to the connecting metal 34 on the rear end side of the preceding core member by using a bolt 33 a and a nut 33 b, and one side of the L shape is the connecting metal 34 Are attached so that the other side is the upper surface. A hole 34Aa is formed on the upper surface of the auxiliary metal fitting 34A. Using the bolt 31a and the nut 31b, the "L" -shaped auxiliary metal fitting 32A is attached to the connecting metal piece 32 on the front end side of the subsequent core member, and one side of the L shape follows the attachment surface of the connecting metal piece 32, and the other side. It is attached so that becomes the upper surface. A hole 32Aa is formed on the upper surface of the auxiliary metal fitting 32A.

  The connection member 90 is arranged so that the hole 91 of the connection member 90 overlaps the hole 34Aa, and the connection fitting 90 is fixed to the upper surface of the auxiliary fitting 34A using the bolt 95 and the nut 97. At this time, a washer may be attached to the bolt 95 if necessary. On the other hand, the elongated hole 91 is aligned with the hole 32Aa of the auxiliary metal fitting 32A, and the connecting member 90 is attached to the upper surface of the auxiliary metal fitting 32A using the bolt 95 and the nut 97. However, the coil spring 99 is installed between the head of the bolt 95 and the upper surface of the connecting member 90 so that the bolt 95 is loosely inserted. By pressing the head of the bolt 95 against the elastic force of the coil spring 99, the fixing of the connecting member 90 by the bolt 95 and the nut 97 can be temporarily released. Therefore, the connection length by the connection member 90 shown in FIG. 30 can be expanded and contracted by changing the position fixed by the bolt 95 and the nut 97 while the head of the bolt 95 is pushed.

  FIG. 32A shows a state where the bolt 95 is positioned at the other end of the long hole 93 and the coupling length is maximized. FIG. 32B shows a state where the bolt 95 is positioned at one end of the long hole 93 and the connection length is minimized. By changing the fixing position by the bolt 95 and the nut 97, the connection length can be expanded and contracted in the range from the maximum to the minimum.

  In the embodiment shown in FIG. 33, a plurality of core members 20 holding the coil molded body 10 each having a reduced diameter are connected in advance on the ground, for example, using such a connecting member having a variable connecting length. In this state, it is drawn into the existing pipe 100 from the manhole. More specifically, the preceding core material and the subsequent core material are sequentially connected on the ground using the connecting member 90. Then, for example, the connection length is increased as shown in FIG. 32A until the second manhole 104 is drawn into the existing pipe 100, and the connection is made as shown in FIG. Shorten the length. Although it may be drawn into the existing pipe 100 with a long connection length, the number of core materials that can be drawn into the existing pipe 100 at a time is reduced. On the other hand, if the connection length is shortened when drawing into the existing pipe 100, the number of core materials drawn into the existing pipe 100 at a time will not be reduced.

  In this manner, in the embodiment of FIG. 33, the work of connecting the core members holding the coil molded body in a reduced diameter state can be performed on the ground, so that the construction efficiency is improved.

  Although not described in the above-described embodiment, when a core material loaded with a reduced diameter coil formed body is continuously drawn into the existing pipe 100, for example, a resin sheet is provided in advance on the inner surface of the existing pipe 100. Alternatively, the friction between the coil molded body and the inner surface of the existing pipe may be reduced.

  In the above-described embodiment, the guides 46a, 46b and 46c and the guides 48a and 48b are all provided on the core member 20 and operated on the diameter expanding device 60 side. However, these guides may be provided in the diameter expansion device 60 to restrict the front end and the rear end of the coil molded body 10 on the core member 20.

  Furthermore, although the IT hanger is used as the connection member 90 in the embodiment, the connection member 90 is not limited to this, and connection members having other arbitrary shapes and structures can be used.

  In the above-described embodiment, air-driven ones such as the air motors 70a and 70b and the air cylinders 84a, 84b, and 84c are used. However, these may be electrically driven or hydraulically driven.

  In addition, the specific numerical values such as the dimensions given above are merely examples, and can be appropriately changed according to necessity such as product specifications.

DESCRIPTION OF SYMBOLS 10, 10a1-10a5, 10b1-10b5 ... Coil molded object 12 ... Wire rod 14a, 14b ... Female thread 18 ... Lining material 20, 20a1-20a5, 20b1-20b5 ... Core material 60 ... Expanding device 90 ... Connecting member 100 ... Existing pipe 102 ... 1st manhole 104 ... 2nd manhole 108, 114 ... Rope 110 ... Previous conduit S1 ... 1st section S2 ... 2nd section

Claims (11)

A lining method for forming a rehabilitating pipeline by laying a coil molded body in an existing pipe buried between a first manhole and a second manhole, and inserting a lining material into the coil molded body,
(A) A plurality of core members each having a hollow portion and holding a coil molded body having an outer diameter corresponding to the inner diameter of the existing pipe in a reduced diameter state are connected to the outer surface thereof. Drawing into the existing pipe,
(B) A step of expanding the diameter of the coil molded body held by the leading core material by removing the coil molded body from the leading core material;
(C) a step of positioning the subsequent core material at a position subsequent to the coil molded body whose diameter has been expanded in step (b) by further moving the subsequent core material;
(D) expanding the diameter of the coil molded body held on the positioned subsequent core material by removing the coil molded body from the positioned subsequent core material; and (e) the steps (c) and (d) ) As necessary, and a step of laying a coil molded body in the existing pipe.   The lining method according to claim 1, wherein the steps (b) and (d) are executed by a diameter expanding device that moves in a hollow portion of the core material.   The lining method according to claim 1 or 2, wherein in the step (a), the core material is sequentially drawn from the second manhole into the existing pipe by pulling the leading core material from the first manhole side.   The lining method according to any one of claims 1 to 3, further comprising a step (f) of taking out the core material from which the coil molded body is removed through the first manhole.   The lining method according to claim 4, wherein in the step (f), the core material is taken out every time the step (b) or (d) is executed.   The lining method according to claim 4, wherein in step (f), a plurality of core materials are taken out at a time after executing step (b) or (d).   The lining method according to any one of claims 1 to 6, wherein in the step (a), a plurality of core members that are connected in advance on the ground are sequentially drawn into the existing pipe through the second manhole.   The lining method according to any one of claims 1 to 6, wherein, in the step (a), a plurality of core members are sequentially drawn into the existing pipe while being connected in the second manhole. In the step (a), (a1) by pulling from the first manhole side, a plurality of core members are sequentially drawn into the existing pipe in a first section between the first manhole and the second manhole,
After the step (a1), the steps (b) to (e) are executed in the first section,
(G1) After the step (e), a plurality of core members in a second section different from the first section between the first manhole and the second manhole are removed from the coil molded body. In the step (a), (a2) by pulling from the second manhole side, a plurality of core members are sequentially drawn into the existing pipe in the second section,
After the step (a2), the steps (b) to (e) are executed in the second section,
(G2) The lining method according to claim 1, wherein after the step (e), the plurality of core members in the first section, from which the coil molded body is removed, are taken out from the second manhole.   (h) A lining method for further executing step S of laying a lining material inside the coil molded body laid by the lining method according to any one of claims 1 to 9.   Rehabilitation pipeline rehabilitated by the lining method according to claim 10.

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