JP2012042036A - Insertion guide device of flexible pipe and conduit renewal method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the tensile strength of a flexible pipe even if it has a bent pipe, when drawing the flexible pipe into an existing pipe.SOLUTION: A wire 4 is made to pass to a starting vertical shaft through an existing water pipe 1 from a reaching vertical shaft 3, connected to the insertion end of a flexible pipe device 5, and lifted up at the side of the reaching vertical shaft 3, and the flexible pipe device 5 is drawn into the existing water pipe 1. An inset guide device 60 is attached to the insertion end of the flexible pipe device 5. The insertion guide device 60 has insertion guide members 61 to 63. The insertion guide members 61 to 63 are internally penetrated with the wire 4, connected to the insertion end of the flexible pipe device 5, and freely inclined with respect to the axial line of the flexible pipe device 5 following a force P4 in the tensile direction of the flexible pipe device 5. A partial force P5 for pressing the internal face of the inside of the bent pipe 1a is set smaller than a force P2 in a comparison example, and a partial force in the direction of the axial line O of the flexible pipe device 5 becomes P6, and also becomes larger than a force P3 in the comparison example, thus reducing the tensile strength of a hoisting machine 7.

Description

  In the present invention, when a flexible pipe is inserted into an existing pipe embedded in an existing water pipe or the like to renew a pipeline, the flexible pipe is attached to the tip of the flexible pipe inserted into the existing pipe. The present invention relates to an insertion guide device that guides retraction into a pipe and a pipe line updating method.

  There exists a thing as shown to patent document 1 in a pipeline renewal construction method. In Patent Document 1, in order to update the pipeline of an existing water pipe, a thin flexible pipe is inserted into the existing water pipe. The method of updating pipes using flexible pipes is easier to update than the method of updating pipes by inserting straight pipes into existing water pipes because the flexible pipes bend. It becomes. For example, in the method of renewing a pipeline using a flexible tube, the flexible tube bends easily even when the existing water pipe, which is a sheath tube, has a curved pipe portion. Moreover, since it can be drawn into the existing water pipe simply by pulling the flexible pipe, the construction period can be greatly shortened. Furthermore, the buried water pipe can be exposed, and the start shaft and the reaching shaft can be reduced by inserting and pulling out the flexible tube, and the road surface restoration area can be greatly reduced.

  This flexible tube is usually drawn into an existing water pipe using a winch. When the existing water pipe which draws in a flexible pipe has a curved pipe part, the pulling force which pulls a flexible pipe will become large in a curved pipe part. This is because the insertion end of the flexible tube is pressed against the inner surface of the inside of the bent tube portion with a strong force in front of the bent tube portion and the bent tube portion, which becomes a large load. For this reason, it is necessary to use a winch having a large power so that the flexible tube can be pulled in the bent tube portion. In addition, if the flexible tube is forcibly pulled using a winch in the bent tube portion, the flexible tube may be damaged, and the winch may be damaged.

JP 2009-92175 A

  The present invention relates to an insertion guide device for a flexible tube that can reduce the pulling force of the flexible tube even when there is a curved tube portion when the flexible tube is drawn into an existing tube, and the insertion guide device. It aims at providing the used pipeline renewal construction method.

  In addition, the present invention provides a flexible tube insertion that can make the hoisting machine used when pulling the flexible tube into the existing tube small in size with a small pulling force, thereby further facilitating the pipeline renewal work. It is an object of the present invention to provide a guide device and a pipe line renewal method using the insertion guide device.

  In order to solve the above-described problems, in the flexible tube insertion guide device according to the present invention, a wire passed through an existing tube is directly or indirectly connected to an insertion end of the flexible tube, and the wire is wound up. This is an insertion guide device in the existing pipe of the flexible pipe drawn into the existing pipe. The insertion guide device includes an insertion guide member having a diameter substantially the same as or slightly larger than that of the flexible tube, and an outer peripheral surface in contact with the inner surface of the existing tube having a substantially curved surface. When the flexible tube is pulled by the insertion guide member being directly or indirectly connected to the insertion end of the flexible tube through the wire, the bent tube portion of the existing tube In FIG. 4, the flexible tube is inclined with respect to the inner surface of the bent tube portion.

  Further, the flexible tube insertion guide device according to the present invention is configured such that a wire passed through an existing tube is directly or indirectly connected to an insertion end of the flexible tube, and the wire is wound up so that the wire is wound into the existing tube. It is an insertion guide apparatus in the existing pipe of the flexible pipe drawn. The insertion guide device includes an insertion guide member having a diameter substantially the same as or slightly larger than that of the flexible tube, and an outer peripheral surface in contact with the inner surface of the existing tube having a substantially curved surface. In the insertion guide member, the wire is connected to the distal end side, and the flexible tube is pulled by being directly or indirectly connected to the insertion end of the flexible tube via a link portion. In this case, the bent pipe portion of the existing pipe is inclined with respect to the flexible pipe so as to follow the inner inner surface of the bent pipe portion.

  Further, the flexible tube insertion guide device according to the present invention is configured such that a wire passed through an existing tube is directly or indirectly connected to an insertion end of the flexible tube, and the wire is wound up so that the wire is wound into the existing tube. It is an insertion guide apparatus in the existing pipe of the flexible pipe drawn. The insertion guide device includes an insertion guide member having a diameter substantially the same as or slightly larger than that of the flexible tube, and an outer peripheral surface in contact with the inner surface of the existing tube having a substantially curved surface. The insertion guide member is directly or indirectly connected to the insertion end of the flexible tube, so that when the flexible tube is pulled by the wire, the bending guide member is bent at the bent tube portion of the existing tube. It is made to incline with respect to the said flexible tube so that the inner surface of the inner side of a pipe part may be followed.

  In the pipe renewal method according to the present invention, a start shaft and a reach shaft are provided so that the existing existing pipe is exposed, and a wire is passed from the reach shaft through the existing tube to the start shaft, A wire is directly or indirectly connected to an insertion end of a flexible tube to be inserted into the existing tube, the wire is wound up on the reaching shaft side, and the flexible tube is drawn into the existing tube. At this time, the insertion guide device as described above is attached to the insertion end of the flexible tube, and the flexible tube to which the insertion guide device is attached is drawn into the existing tube.

  According to the present invention, the insertion guide member is directly or indirectly connected to the insertion end of the flexible tube, so that when the flexible tube is pulled, the curved tube portion of the existing tube is bent. It is made to incline with respect to a flexible tube so that the inner surface of the inside may be imitated. Therefore, in the bent pipe portion of the existing pipe, the component force that presses the inner surface inside the bent tube portion perpendicular to the axis of the flexible tube is reduced, the component force in the axial direction of the flexible tube is increased, and the hoisting machine The pulling force can be reduced. Therefore, the hoisting machine used when pulling the flexible pipe into the existing pipe can be made small with a small pulling force, and the pipe renewal work can be made easier.

It is a figure which shows the pipe line update construction method in which this invention is used. It is principal part sectional drawing of the flexible pipe drawn in in an existing pipe. It is principal part sectional drawing which showed the state which connected the insertion port and the receiving port. It is a perspective view of the head cover apparatus attached to the flexible tube apparatus. It is a disassembled perspective view of the head cover apparatus attached to a flexible tube apparatus. It is principal part sectional drawing which shows the state which connected the head cover apparatus to the insertion end of the flexible tube apparatus. It is the perspective view which looked at the insertion guide apparatus from the side attached to a head cover. It is a top view which shows the state of the insertion guide apparatus in the curved pipe part of the existing water pipe. It is a top view which shows the modification of an insertion guide apparatus. It is a top view which shows the further modification of an insertion guide apparatus. It is a top view which shows the further modification of an insertion guide apparatus.

  Hereinafter, a pipeline renewal method using an insertion guide device to which the present invention is applied will be described with reference to the drawings. Here, an explanation will be given by taking as an example the pipeline update of the existing existing water pipe 1.

  As shown in FIG. 1, the pipeline renewal method to which the present invention is applied is mainly adopted in the pipeline renewal of an aged existing water pipe 1 that crosses a wide, high-standard road such as a main road. The In this case, the starting shaft 2 is provided on one side of the road, and the reaching shaft 3 is provided on the other side. Next, the wire 4 is led through the existing water pipe 1 buried from the reaching vertical shaft 3 to the start vertical shaft 2, and the wire is attached to the tip of the flexible tube device 5 which becomes a new pipe having a diameter smaller than the inner diameter of the existing water pipe 1. 4 is attached.

  Here, the flexible pipe device 5 is flexible enough to be bent following the curved pipe section 1a even in the curved pipe section 1a of the existing water pipe 1. The flexible tube device 5 is prepared in a state where it is wound around a drum 6 installed on the start shaft 2 side.

  When the wire 4 is wound up by a winder 7 such as a winch installed on the reach shaft 3 side, the flexible tube device 5 is drawn into the existing water pipe 1. When the distal end of the flexible tube device 5 reaches the reaching shaft 3, an insertion port is provided at the distal end, and this insertion port is connected to the receiving port of the first water pipe 8 that is buried. In addition, for example, a receiving port is provided at the end of the flexible pipe device 5 on the start shaft 2 side, and this receiving port is connected to the insertion port of the second water pipe 9 that is buried.

  The first water pipe 8 and the second water pipe 9 are composed of a cast iron pipe, a resin pipe such as a vinyl chloride resin pipe or a polyethylene resin pipe, a metal pipe such as a steel pipe or an aluminum alloy pipe, or the like. Not only a straight pipe but also a flexible pipe device 5 described later may be used.

  In addition, the pipe renewal method of the present invention is used for renewal of the existing water pipe 1 that crosses a high-standard road, as well as for renewal of the existing water pipe that crosses a track such as a railroad or a traffic road. It can be used in places where it is difficult to replace the existing water pipes such as renewal of existing water pipes below or renewal of existing water pipes that cross rivers. Moreover, the pipeline renewal construction method of this invention can be used also in places other than these.

[Description of flexible tube device]
Here, the flexible pipe device 5 inserted into the existing water pipe 1 has, for example, a blade on the outer peripheral surface of the bellows pipe 11 having flexibility, stretchability, and sealing property as shown in FIG. 12 is wound and formed. Moreover, the end tube 13 in which an insertion port or a receiving port is provided is provided at both ends of the bellows tube 11.

  As shown in FIG. 2, the bellows pipe 11 is made of a metal material such as a stainless material having excellent mechanical properties and rust prevention properties, and has a bellows body 11a having a bellows in which convex portions are continuously formed in the pipe axis direction. In order to connect the end tube 13 to both end portions of the bellows main body 11a, straight tubular connection portions 11b are integrally provided. The bellows pipe 11 is provided with a diameter smaller than the inner diameter of the existing water pipe 1 and has a sufficient length to reach from the starting shaft 2 to the reaching shaft 3. The bellows tube 11 is designed with a plate thickness, the number of bellows, a height, and the like so that the bellows tube 11 is flexible and stretchable to the extent that it can be easily bent by an operator.

  As shown in FIG. 2, the blade 12 is wound on the outer peripheral surface of the bellows main body 11a over the entire length along the tube axis direction in order to prevent the bellows main body 11a from extending or being locally deformed. As the blade 12, for example, a ribbon blade formed by weaving a strip-shaped metal thin plate in a mesh shape, a wire blade formed by weaving metal wires in a mesh shape, or the like is used.

  As shown in FIG. 2, the end tube 13 connected to the connecting portion 11b is made of a metal material such as a stainless material having excellent mechanical characteristics and rust prevention properties, and is substantially the same as the outer diameter of the connecting portion 11b of the bellows tube 11. It is formed in a straight tube having the same inner diameter.

  The end tube 13 is connected to the connection portion 11 b of the bellows tube 11. Specifically, as shown in FIG. 2, the inner peripheral surface of the end tube 13 is fitted to the outer peripheral surface of the connecting portion 11 b of the bellows tube 11. And as shown to the code | symbol 15a in FIG. 2, the end pipe 13 and the front-end | tip of the connection part 11b are the end pipes 13 so that the intensity | strength of the bellows main body 11a may not fall by the influence by the heat | fever etc. at the time of welding. And are integrated with the bellows tube 11.

  A ring-shaped flange member 16 made of a metal material such as stainless steel is fitted to the end tube 13 on the outer peripheral surface. The end tube 13 is integrated with the inner peripheral surface of the flange member 16 by welding as indicated by reference numeral 15b in FIG. The flange member 16 is formed so as to have substantially the same height as each convex portion constituting the bellows tube 11, and when the connecting portion 11b is fitted to the end tube 13, the outermost convex portion of the bellows body 11a is externally connected. The end of the bellows main body 11a is protected by being abutted.

  The end tube 13 may be provided with one or a plurality of tongue pieces for protecting the end portion of the bellows main body 11 a in the circumferential direction of the end tube 13 in addition to the ring-shaped flange member 16.

  As shown by a reference numeral 15 c in FIG. 2, an end portion of the blade 12 wound around the bellows main body 11 a and a blade pressing member 17 are welded to the outer peripheral surface of the flange member 16. The blade pressing member 17 is ring-shaped and protects the end of the blade 12 against the bellows main body 11a so that the end of the blade 12 wound around the bellows main body 11a, which is a fabric, does not unravel. Thereby, the braid | blade 12 is being fixed to the bellows main body 11a in the end of the bellows main body 11a.

  A rust preventive tape 18 is wound around the outer peripheral surface of the blade 12 wound around the bellows tube 11, and a protective tape 19 is wound around the outer layer portion of the wound rust preventive tape 18. The rust preventive tape 18 and the protective tape 19 are fixed by a retaining ring 20 at one end of the bellows main body 11a. The rust preventive tape 18 does not reach the bellows tube 11 even when water permeates from the tape-shaped protective tape 19 whose adhesive strength is reduced by the bellows tube 11 being buried in the ground for a long period of time. Prevent corrosion.

Note that the blade 12, the antirust tape 18 and the protective tape 19 wound around the bellows body 11a do not impair the properties of the bellows tube 11 such as flexibility and stretchability. Further, the rust preventive tape 18, the protective tape 19, and the retaining ring 20 may not be provided depending on use conditions.
[Explanation of connection structure of insertion port and receiving port]
An insertion port is provided in one end tube 13 of the flexible tube device 5, and a receiving port is provided in the other end tube 13. Here, FIG. 3 shows a connection structure between the receiving opening and the insertion opening. In the example of FIG. 3, the insertion port 25 of one end tube 13 of the flexible tube device 5 is connected to the receiving port 28 of the first water pipe 8 shown in FIG.

  The configuration of the receiving port 28 of the first water pipe 8 is the same as the configuration of the receiving port of the other end tube 13 of the flexible tube device 5. Further, the configuration of the insertion port 25 of the one end tube 13 of the flexible tube device 5 is the same as the configuration of the insertion port of the second water pipe 9. The receiving port of the flexible tube device 5 is also connected to the insertion port of the second water pipe 9 with a structure as shown in FIG.

  Here, the connection structure between the insertion port 25 of the flexible tube device 5 and the receiving port 28 of the first water pipe 8 will be mainly described with reference to FIG.

  The end tube 13 connected to the bellows tube 11 has an outer circumferential surface on the outer circumferential surface thereof with a concave groove 21 in which a later-described detachment preventing member 24 is engaged over the entire circumference, and the entire circumference in the circumferential direction. A stopper portion 22 is formed on which a head cover device 40 to be described later is locked.

  As shown in FIG. 3, the end tube 13 provided at one end of the flexible tube device 5 having the above-described configuration is such that the flange member 23 is inside the concave groove 21 with respect to the end tube 13 (on the bellows tube 11 side). When the separation preventing member 24 is engaged with the concave groove 21, the insertion opening 25 is formed.

  The flange member 23 is formed in a ring shape from a metal material such as stainless steel having excellent mechanical properties and rust prevention properties, and an insertion hole 23a through which the end tube 13 is inserted is formed at the center. Further, the flange member 23 is formed with a drop-off prevention piece 26 protruding in the tube axis direction. Further, the flange member 23 is formed with a plurality of first through holes 27 penetrating in the thickness direction at equal intervals on substantially the same circumference.

  As shown in FIG. 3, the detachment preventing member 24 has a ring shape or a C ring shape made of a metal material such as stainless steel having excellent mechanical characteristics and rust prevention properties, and is engaged with the concave groove 21 to be a flange member. The flange member 23 is prevented from falling to one end side of the end tube 13 by engaging with the inner peripheral end of the end tube 13.

  Further, as shown in FIG. 3, when the insertion opening 25 is inserted into the receiving opening 28, the insertion opening 25 fills the gap between the insertion opening 25 and the receiving opening 28 to receive the insertion opening 25 and the receiving opening 25. A sealing member 29 that retains watertightness and airtightness with the mouth 28 is attached. The sealing member 29 is formed in a substantially conical cylinder shape by an elastic material such as rubber or synthetic rubber.

  On the other hand, as shown in FIG. 3, the receiving port 28 into which the insertion port 25 configured as described above is inserted includes a receiving portion 31 having a diameter larger than the straight tubular end tube 13 of the insertion port 25, and a receiving port. And a coupling portion 32 provided on the outer peripheral surface of the portion 31.

  The receiving portion 31 is formed of a metal material such as a stainless steel material having excellent mechanical characteristics and rust prevention properties, and has a large-diameter tube portion 33 having an inner diameter larger than that of the end tube 13 and one of the flexible tube devices 5. The end tube 13 has a straight pipe portion 34 connected to the insertion opening 25 and a connecting pipe portion 35 between the large diameter pipe portion 33 and the straight pipe portion 34, and is formed in a substantially funnel cross section as a whole. ing.

  The large-diameter pipe portion 33 is formed with a tapered portion 36 that gradually becomes smaller in diameter toward the inside where the sealing member 29 is crimped when the insertion opening 25 is inserted. A coupling portion 32 having an outer diameter substantially the same as the outer diameter of the flange member 23 is integrally formed at the tip of the outer peripheral surface of the large diameter pipe portion 33 over the entire circumference.

  A plurality of second through holes 37 penetrating in the thickness direction are formed in the coupling portion 32. The coupling portion 32 is coupled to the flange member 23 by inserting the first bolt 38 through the first and second through holes 27 and 37 and fastening the nut 39 to the first bolt 38.

  Since the straight pipe part 34 has the same configuration as the other end of the end pipe 13, a detailed description thereof will be omitted.

  In the pipe renewal method, as shown in FIG. 1, a head cover device 40 is attached to the distal end serving as an insertion end of the flexible tube device 5 having the bellows tube 11, which is a flexible tube, as a main component. Further, the insertion guide device 60 to which the present invention is applied is attached to the head cover device 40, the wire 4 is attached to the head cover device 40 or the insertion guide device 60, and the wire 4 is wound up by the hoisting machine 7 such as a winch. As a result, the flexible pipe device 5 is drawn into the existing water pipe 1 from the start shaft 2. When the insertion guide device 60 and the head cover device 40 that are the insertion ends of the flexible tube device 5 are exposed in the reaching shaft 3, the insertion port 25 is provided at one end of the flexible tube device 5 in the reaching shaft 3. The insertion port 25 is connected to the receiving port 28 of the first water pipe 8 as shown in FIG. Further, the flexible pipe device 5 is provided with a receiving port 28 in the start shaft 2, and the insertion port of the second water pipe 9 is connected to the receiving port 28 as shown in FIG. .

  In connecting the flexible pipe device 5 to the first water pipe 8 and the second water pipe 9, the structure is not limited to the structure shown in FIG. The first water pipe 8 or the second water pipe 9 may be joined by welding. When the flexible pipe device 5 and the first water pipe 8 or the second water pipe 9 are connected by welding, the connection structure can be simplified. In addition, as a modification of FIG. 3, the stopper 22, the separation preventing member 24, and the concave groove 21 to which the separation preventing member 24 is attached may be omitted.

[Description of head cover device]
Hereinafter, the head cover device 40 attached to one end tube 13 of the flexible tube device 5 serving as an insertion end to the existing water pipe 1 will be described with reference to FIGS.

  The head cover device 40 is formed in a substantially bullet shape with a metal material such as a stainless material having excellent mechanical properties and rust prevention. The head cover device 40 includes a cover main body 41 provided so that the distal end is gradually reduced in diameter, a wire attachment portion 42 to which the wire 4 is attached, welded to the distal end side outer peripheral surface of the cover main body 41, and the end tube 13. And a connection portion 43 connected to the.

  The cover body 41 has a shell-like shape in which a conical tip is provided at one end of a substantially cylindrical body, and is divided into two along the major axis so as to be easily attached to and detached from the end tube 13. It consists of a body 41a and a second half 41b. The first and second halves 41a and 41b have a maximum outer diameter to protect the insertion end of the flexible tube device 5 and the vicinity thereof when the abutting surfaces 44a and 44b are abutted with each other. The device 5 is provided with substantially the same diameter or a slightly larger diameter. The first and second halves 41 a and 41 b have a total length that can accommodate the end tube 13 from the tip to the stopper portion 22.

  The cover main body 41 having the above-described configuration is provided so that the tip is gradually reduced in diameter, so that the flexible pipe can be a main component while being inserted into the existing water pipe 1. The flexible tube device 5 can be guided so as not to be in contact with or caught on steps or deposits inside the existing water pipe 1.

  Note that the cover body 41 is not limited to a conical shape at the tip, and may be flat or may have other shapes, for example, a hemispherical shape.

  The wire attachment portion 42 provided at the conical tip portion of the cover body 41 is formed at the tip portion of the cover body 41 so as to be substantially triangular with a constant width. The wire attachment portion 42 includes a first wire attachment piece 42a on the distal end surface of the first half 41a and a second wire attachment piece 42b on the distal end surface of the second half 41b. .

  First and second through holes 45a and 45b to which the wire 4 and the wire attachment member 54 are attached are formed in the first and second wire attachment pieces 42a and 42b. The first and second through holes 45a and 45b coincide when the first half 41a and the second half 41b are abutted, and the wire 4 and the wire attachment member 54 are attached. The first and second through holes 45a and 45b to which the wires 4 are attached may be plural.

  Further, the first and second wire attachment pieces 42a, 42b are formed with first and second coupling holes 46a, 46b for coupling the first half 41a and the second half 41b. . The first and second coupling holes 46a and 46b are formed, for example, by forming one half of the coupling hole as a screw hole, inserting a bolt 47 from the other half of the coupling hole, and tightening the one coupling hole. Thus, the first and second halves 41a and 41b are joined together.

  Further, the cover main body 41 is provided with a connection portion 43 that is engaged with the stopper portion 22 of the end tube 13 and is connected to the end tube 13 at the base end portion opposite to the distal end side where the wire attaching portion 42 is provided. It has been. The connecting portion 43 includes a first locking portion 43a provided on the side opposite to the tip side where the first wire attachment piece 42a of the first half 41a is provided, and a second portion of the second half 41b. It is comprised by the 2nd latching | locking part 43b provided in the other side and the front end side in which the wire attachment piece 42b was provided. The first and second locking portions 43a and 43b are each formed by notching the bottom surface in a semicircular shape, and are inserted when the first half body 41a and the second half body 41b are brought into contact with each other. A circular hole 48 slightly larger than the outer diameter of the end tube 13 is formed, and the inner peripheral end is engaged with the stopper portion 22 of the end tube 13.

  Further, first and second coupling holes 49a for integrally coupling the first half 41a and the second half 41b to the bottom surfaces of the base end portions of the first and second halves 41a and 41b. , 49b are formed. For example, the first and second coupling holes 49a and 49b are formed at two locations near the butting surfaces 44a and 44b and near both ends, respectively.

  The coupling member 51 is a rectangular thin plate, and is formed on the bottom surface of the base end portion of the first and second halves 41a and 41b in order to couple the first and second halves 41a and 41b. First and second attachment holes 52a and 52b corresponding to the first coupling holes 49a and 49b are formed.

  The head cover device 40 having the above-described configuration is configured to match the first and second through holes 45a and 45b when the flexible tube device 5 is inserted from the start shaft 2 into the existing water pipe 1. The first and second halves 41a and 41b are abutted in a state where the first and second locking portions 43a and 43b are disposed inside the stopper portion 22. The first and second halves 41a and 41b are formed by fastening the bolts 53 to the first and second coupling holes 49a and 49b and the first and second mounting holes 52a and 52b, thereby coupling the member 51. It is integrated through. The first and second halves 41a and 41b are coupled by bolts 47 at the first and second coupling holes 46a and 46b. At this time, the head cover device 40 is attached to the end tube 13 with a slight backlash by the first and second locking portions 43a, 43b and the stopper portion 22 being locked.

  In the head cover device 40 connected to the end tube 13, the wire attachment member 54 to which the wire 4 is attached is attached to the wire attachment portion 42. The wire attachment member 54 for inserting the flexible tube device 5 connected to the head cover device 40 into the existing water pipe 1 from the start shaft 2 is made of a metal material such as stainless steel, and has a substantially U-shape as a whole. Yes. The wire attachment member 54 has first and second attachment holes 55a and 55b formed in a pair of opposed pieces.

  After the first and second halves 41a and 41b are joined, the wire attachment member 54 is passed through the annular portion 4e that is a connection portion with the wire attachment member 54 formed at the distal end portion of the wire 4, The bolts 56 are fastened to the second through holes 45a and 45b and the first and second mounting holes 55a and 55b to be attached to the wire attachment portion 42. Note that the wire 4 may be fixed through a through hole formed in the wire attachment portion 42.

  The configuration of the head cover device 40 is not limited to the above example. For example, the first and second halves 41a and 41b are connected via hinges, and the first and second halves 41a and 41b are connected. 41b may not be separated. Further, the wire 4 may be directly attached to the first and second through holes 45a and 45b to which the wire attaching member 54 of the wire attaching portion 42 is attached.

[Description of Insertion Guide Device]
As shown in FIGS. 4, 6, and 7, an insertion guide device 60 is attached to the distal end side of the head cover device 40. The insertion guide device 60 includes a plurality of insertion guide members 61, 62, and 63 having different diameters. These insertion guide members 61, 62, 63 are provided with a substantially conical insertion guide member 63 at the tip, and subsequently, the insertion guide members 62, 61 are formed in a substantially truncated cone shape. The insertion guide member 61 having a substantially frustoconical shape located closest to the head cover device 40 has a bottom surface diameter that is substantially the same as the diameter of the head cover device 40, that is, the diameter of the flexible tube device 5 or the diameter of the flexible tube device 5. It is formed to be slightly larger. In addition, the substantially conical insertion guide member 63 located at the tip has the smallest bottom diameter. That is, the insertion guide device 60 has a substantially conical shape as a whole, has a shape obtained by dividing the cone into three in the height direction, and is arranged so as to become smaller toward the distal end side.

  Each of these insertion guide members 61, 62, and 63 is formed of a metal material such as a stainless steel material excellent in mechanical characteristics and rust prevention properties, or a resin having sufficient strength.

  Note that the diameter of the bottom surface of the insertion guide member 61 may be smaller than the diameter of the head cover device 40 or the diameter of the flexible tube device 5 as long as it is slight.

  Each insertion guide member 61, 62, 63 has insertion holes 61a, 62a, 63a formed along the central axis. The insertion hole 61a, 62a, 63a is inserted through the insertion wire 4b. When the through wire 4b is passed through the insertion holes 61a, 62a, and 63a, the opposing surfaces of the insertion guide members 61, 62, and 63 adjacent to each other are inserted into the insertion guide members 61, 62, and 63 adjacent to each other. It is a spherical seat so that it can be freely tilted with respect to the surface. Specifically, the largest insertion guide member 61 has spherical seating surfaces 61b and 61c on the top and bottom surfaces. In addition, the insertion guide member 62 has spherical seating surfaces 62b and 62c on the top and bottom surfaces. Furthermore, the insertion guide member 63 located at the tip has a spherical seat surface 63b at the bottom.

  When the insertion guide device 60 is used, the bottom surface of the insertion guide member 63 at the front end and the top surface of the insertion guide member 62 at the middle position, and the bottom surface of the insertion guide member 62 and the top surface of the insertion guide member 61 at the rearmost portion are close to each other. Become. Since the opposing surfaces of the adjacent insertion guide members 61, 62, 63 are spherical seat surfaces 63b, 62b, 62c, 61b, the respective insertion guide members 61, 62, 63 are adjacent to the insertion guides. It can be freely tilted with respect to the member. Further, even if the insertion guide members 61, 62, and 63 rotate about the centering wire 4b, the centering wire 4b is not twisted and is inclined with respect to the adjacent insertion guide member. It can prevent obstruction.

  Moreover, in this insertion guide apparatus 60, the part which contact | connects the inner surface of the existing water pipe 1 of each insertion guide member 61,62,63 is formed so that a curved surface may be formed, and with the internal peripheral surface of the existing water pipe 1 Friction is reduced.

  Since the spherical seating surface 61c on the bottom surface of the insertion guide member 61 at the rearmost part is close to the head cover device 40, it does not necessarily have to be a spherical seating surface.

  Here, the wire 4 is formed by connecting a winding wire 4 a wound up by a hoisting machine 7 such as a winch and a through wire 4 b inserted through insertion guide members 61, 62, 63. One end of the winding wire 4a is fixed to the drum of the winder 7 such as a winch, wound around the drum, and a hook 4c is provided at the tip. Further, an annular portion 4d serving as an engaging portion to be engaged with the hook 4c is formed at a terminal on the connection side of the centering wire 4b with the winding wire 4a, and a head cover is provided on the terminal on the head cover device 40 side. An annular portion 4e serving as a connecting portion connected to the device 40 is provided.

  In addition, the connection part and engagement part provided in each terminal of the penetration wire 4b are not limited to the above annular parts 4d and 4e. In addition, the wire 4 may not be configured by the winding wire 4a and the through wire 4b, but may be configured by one winding wire 4a. In this case, the insertion guide members 61, 62, and 63 are inserted through the winding wire 4 a, and the terminal is fixed to the head cover device 40.

  In the insertion guide device 60 as described above, the penetration wire 4b is passed through the insertion holes 61a, 62a, 63a of the insertion guide members 61, 62, 63, and the annular portions 4d, 4e are provided at the respective ends of the penetration wire 4b. It is handled in the formed state, and is transported as a unit to, for example, a construction site for pipeline renewal. Of course, the insertion guide device 60 may be assembled at the construction site where the pipeline is updated.

  In such an insertion guide device 60, the insertion guide members 61, 62, and 63 are inserted through the insertion wire 4 b connected to the winding wire 4 a so that the diameter gradually increases from the distal end side. It has a substantially conical shape, and functions as a guide device for advancing the flexible tube device 5 in the existing water pipe 1. Further, as will be described later, the insertion guide device 60 reduces the load that opposes the pulling force in the curved pipe portion 1a of the existing water pipe 1, and the flexible pipe device 5 advances smoothly even in the curved pipe portion 1a. To be able to.

  In the above example, the insertion guide device 60 in which the insertion guide member 63 having a substantially conical shape is provided at the tip and the insertion guide members 62 and 61 are formed in a substantially truncated cone shape is described. As a modified example of the above, all of the insertion guide members 61, 62, 63 may be spheres. When all of the insertion guide members 61, 62, 63 are spheres, the insertion guide member 63 at the tip is the smallest, and the insertion guide member 61 positioned closest to the head cover device 40 is the largest. The largest insertion guide member 61 is formed so that the diameter thereof is substantially the same as the diameter of the head cover device 40, that is, the diameter of the flexible tube device 5 or slightly larger than the diameter of the flexible tube device 5. Even in the spherical insertion guide members 61, 62, 63, the portions adjacent to each other have a spherical seat surface, and further, the portion in contact with the inner surface of the existing water pipe 1 has a curved surface shape. An effect similar to that of the insertion guide device 60 using the substantially conical insertion guide member 63 and the substantially frustoconical insertion guide members 61 and 62 described above can be obtained. Of course, the number of spherical guide members may be one. In this case, one insertion guide member is formed so that the diameter is substantially the same as the diameter of the head cover device 40, that is, the diameter of the flexible tube device 5 or slightly larger than the diameter of the flexible tube device 5. The diameter of the bottom surface of the insertion guide member 71 may be smaller than the diameter of the head cover device 40 or the diameter of the flexible tube device 5 as long as it is slight.

[Explanation of effects of pipe renewal method and insertion guide device]
Next, the pipeline renewal method to which the present invention is applied will be described.

  First, as shown in FIG. 1, the starting shaft 2 and the reaching shaft 3 are deeply excavated with a backhoe or the like until the existing water pipe 1 is completely exposed, and are constructed with a liner plate or the like. And the existing water pipe 1 exposed in the start shaft 2 and the reaching shaft 3 is a gas fusing device in order to insert or expose the flexible pipe device 5 which is a new water pipe having a diameter smaller than the inner diameter of the existing water pipe 1. The opening is formed by a cutter or a cutter. In some cases, the existing water pipe 1 with openings at both ends is removed from the rust and deposits in the pipe by a pig method or the like so that the flexible pipe device 5 which is a new water pipe can be easily inserted. The And the existing water pipe 1 is exposed from the opening part by the side of the starting vertical shaft 2 by inserting the wire 4a for winding up from the opening part of the existing water pipe 1 by the side of the arrival vertical shaft 3. In the start shaft 2, the above-described insertion guide device 60 and the head cover device 40 are attached to the flexible tube device 5. The winding wire 4a is attached to the insertion guide device 60.

  Specifically, the head cover device 40 is first attached to the flexible tube device 5. As shown in FIGS. 4 to 6, the head cover device 40 aligns the first and second through holes 45 a and 45 b and places the first and second locking portions 43 a and 43 b on the inner side of the stopper portion 22. The first and second halves 41a and 41b are brought into contact with each other in the arranged state. The first and second halves 41a and 41b are formed by connecting the bolts 53 to the first and second coupling holes 49a and 49b and the first and second mounting holes 52a and 52b, thereby coupling members. Integrated through 51. At this time, the head cover device 40 is slightly rattled by the gap between the end tube 13 and the circular hole 48 because the first and second locking portions 43a and 43b and the stopper portion 22 are locked. It is attached to the end tube 13 in a state of having.

  Then, the wire attachment member 54 is connected to the annular portion 4e serving as a connection portion formed in the insertion wire through the insertion guide device 60 after the first and second halves 41a and 41b are joined. 54 is hooked, the bolt 56 is tightened to the first and second through holes 45a and 45b and the first and second mounting holes 55a and 55b, and the wire mounting member 54 is mounted to the wire mounting portion 42 of the cover body 41. It is done. Further, in the insertion guide device 60, the hook 4c provided at the distal end of the winding wire 4a is engaged with the annular portion 4d serving as the engagement portion on the distal end side of the threading wire 4b. Thus, the flexible tube device 5 has the head cover device 40 attached to the insertion end to the existing water pipe 1, and further the insertion guide device 60 attached to the tip side thereof. The flexible tube device 5 is already installed by the winder 7 such as a winch. It will be in the state where drawing into the water pipe 1 is possible. Thus, the insertion guide device 60 is extremely easy to install on the construction site where the pipeline is updated.

  The hook 4c provided at the tip of the winding wire 4a may be excellent in the function of preventing the annular portion 4d from dropping off, such as a carabiner, and the annular portion 4d may be fixed with a screw. It may be a thing. That is, the hook 4c may be provided with a known device for preventing the annular portion 4d from coming off from the hook 4c.

  Next, in the reach shaft 3, the flexible tube device 5 to which the insertion guide device 60 and the head cover device 40 are attached is wound inside the existing water pipe 1 by winding the winding wire 4a with a hoisting machine 7 such as a winch. The insertion guide device 60 is inserted as an insertion end. At this time, a protective sheet is further wound around the outer layer portion of the flexible tube device 5, and this protective sheet protects the bellows pipe 11 from the deposits and the like in the existing water pipe 1 and the flexible pipe. The apparatus 5 is inserted into the existing water pipe 1 in a state in which the apparatus 5 is slippery with respect to the existing water pipe 1.

  Note that the protective sheet may not be provided depending on use conditions.

  By the way, as shown in FIG. 1, the existing water pipe 1 in which the flexible tube apparatus 5 is drawn in is provided with a plurality of curved pipe portions 1a. Here, in FIG. 8, the state of the insertion guide apparatus 60 in the curved pipe part 1a is shown. FIG. 8 also shows an example in which only the head cover device 40 that does not use the insertion guide device 60 is attached as a comparative example.

  In the comparative example, the wire 4 is positioned so as to be in contact with the inner surface on the inner side of the curved pipe portion 1a so as to pass through the shortest route by the pulling force P1. Therefore, the angle formed by the pulling direction P1 of the flexible tube device 5 with respect to the axis O of the flexible tube device 5 is θ2. In this case, the component force that presses the inner inner surface of the bent tube portion 1a perpendicular to the axis O of the flexible tube device 5 is P2, and the component force in the direction of the axis O of the flexible tube device 5 is P3. .

  On the other hand, when the insertion guide device 60 is attached to the tip of the head cover device 40 as in the present invention, the operation is as follows. Since the insertion guide device 60 is formed by passing through the insertion guide members 61, 62, 63 through the centering wire 4b connected to the winding wire 4a, the curved pipe portion 1a has an existing water pipe. It arranges so that an outer peripheral surface may contact | connect the inner surface of the inner side of 1 curved pipe part 1a. Looking at the largest insertion guide member 61, the angle formed by the pulling direction P4 of the flexible tube device 5 with respect to the axis O of the flexible tube device 5 is θ1, which is smaller than θ2 of the comparative example. Therefore, the component force P5 that presses the inner inner surface of the curved pipe portion 1a perpendicular to the axis O of the flexible tube device 5 is smaller than P2 of the comparative example, and the component force in the direction of the axis O of the flexible tube device 5 Becomes P6, which is larger than P3 of the comparative example. That is, the load on the winder 7 such as a winch is reduced.

  Therefore, in the present invention, the flexible pipe device 5 can be smoothly drawn in the curved pipe portion 1a of the existing water pipe 1. In other words, the hoisting machine 7 such as a winch is a flexible tube device 5 with a smaller pulling force than the comparative example in which only the head cover device 40 that does not use the insertion guide device 60 is attached to the curved pipe portion 1a of the existing water pipe 1. Can be pulled in.

  In the above description, the pulling force P4 has been described based on the relationship between the head cover device 40 and the insertion guide member 61. However, the relationship between the insertion guide member 61 and the insertion guide member 62, the insertion guide member 62, and the insertion guide member 63. The relationship with is also the same. That is, in the relationship between the insertion guide member 61 and the insertion guide member 62, the angle θ3 formed by the direction of the pulling force with respect to the central axis of the insertion guide member 61 (which is also the axis of the insertion hole 61a) is reduced. The component force by which the guide member 61 presses the inner inner surface of the curved pipe portion 1a can be reduced. Further, in the relationship between the insertion guide member 62 and the insertion guide member 63, the angle θ4 formed by the direction of the pulling force with respect to the central axis of the insertion guide member 62 (which is also the axis of the insertion hole 62a) is reduced. The component force by which the guide member 62 presses the inner inner surface of the curved pipe portion 1a can be reduced.

  Thus, the flexible pipe device 5 is drawn into the existing water pipe 1 having the curved pipe portion 1a by the winder 7 such as a winch, and the outside of the flexible water pipe 3 from the opening at the other end of the existing water pipe 1 The head cover device 40 is disassembled from the first and second halves 41a and 41b and removed from the flexible tube device 5, and the insertion guide device 60 is further connected to the head cover device 40 and the winding wire 4a. It is removed from the hook 4c. Then, the flange member 23, the separation preventing member 24, the sealing member 29, and the like are attached to the end tube 13 from which the head cover device 40 has been removed, and the insertion opening 25 is configured.

  Specifically, as shown in FIG. 3, the flange member 23 is inserted into the end pipe 13 in the reaching shaft 3. In the end tube 13 in which the flange member 23 is inserted, the separation preventing member 24 is engaged with the concave groove 21. The flange member 23 is provided in a state where the drop-off prevention piece 26 is overlapped with the separation-preventing member 24 engaged with the concave groove 21 in order to prevent the flange member 23 from separating toward the tip side. A sealing member 29 is fitted to the outer peripheral surface of the end tube 13 whose flange member 23 is prevented from being detached toward the distal end side by the separation preventing member 24. Next, the insertion opening 25 is inserted into the receiving port 28 of the first water pipe 8 and coupled to the receiving port 28.

  Thereafter, the reach shaft 3 to which the flexible pipe device 5 and the first water pipe 8 are connected is backfilled to restore the road surface. Also in the start shaft 2, the insertion port of the second water pipe 9 is connected in the same manner as the receiving port of the flexible tube device 5. Then, the start shaft 2 is backfilled and the road surface is restored.

  In the pipe renewal method as described above, when the insertion guide device 60 is used, the component force P5 for pressing the inner surface of the curved pipe portion 1a perpendicular to the axis O of the flexible tube device 5 is a comparative example. Since the component force P6 in the direction of the axis O of the flexible tube device 5 is larger than P2 and larger than P3 of the comparative example, the load is reduced, and the pulling force of the winder 7 such as a winch can be reduced. it can. Therefore, the pipeline update performed by inserting the flexible pipe device 5 into the existing water pipe 1 having the curved pipe portion 1a can be smoothly performed without applying an excessive load to the winder 7 such as a winch. . In other words, it is possible to make the hoisting machine 7 small and have a small pulling force, thereby further facilitating the pipeline renewal work.

  In the above example, the insertion guide device 60 in which the insertion guide member 63 having a substantially conical shape is provided and the insertion guide members 62 and 61 are formed in a substantially truncated cone shape has been described. 63 may be a sphere, and if the adjacent parts form a spherical seat surface and the part in contact with the inner surface of the existing water pipe 1 has a curved surface, other shapes, ellipsoids, It may be a polyhedron close to a sphere.

  The number of insertion guide members is not limited to three, but may be one or two, or may be four or more. When four or more are provided, the insertion guide members are arranged in such a manner that the diameter decreases in order from the largest insertion guide member 61 on the head cover device 40 side toward the smallest insertion guide member 63 at the tip. .

  Further, the insertion guide device 60 may be directly attached to the end tube 13 of the flexible tube device 5 without using the head cover device 40. In this case, the insertion wire 4b through which the insertion guide members 61, 62, and 63 are inserted is directly connected to the end tube 13.

[Variation 1 of Insertion Guide Device]
The insertion guide device 60 described above is configured by inserting a plurality of insertion guide members 61, 62, 63 having different diameters, but the insertion guide device of the present invention may be configured as shown in FIG. . In this example, the insertion guide members constituting the insertion guide device are connected not through the wire 4 but through a link mechanism.

  An insertion guide device 70 shown in FIG. 9 is provided with a substantially conical insertion guide member 73 at the tip, and subsequently, insertion guide members 72 and 71 are formed in a substantially truncated cone shape. The insertion guide member 71 having a substantially frustoconical shape located closest to the head cover device 40 has a bottom surface diameter that is substantially the same as the diameter of the head cover device 40, that is, the diameter of the flexible tube device 5 or the diameter of the flexible tube device 5. It is formed to be slightly larger. The substantially conical insertion guide member 73 located at the tip has the smallest bottom diameter. That is, the insertion guide device 70 has a substantially conical shape as a whole, has a shape obtained by dividing the cone into three in the height direction, and is arranged so as to become smaller toward the distal end side.

  Note that the diameter of the bottom surface of the insertion guide member 71 may be smaller than the diameter of the head cover device 40 or the diameter of the flexible tube device 5 as long as it is slight.

  The substantially conical insertion guide member 73 located at the distal end is formed with, for example, an annular wire attaching portion 74 for engaging the hook 4c provided at the distal end of the winding wire 4a at the distal end. . The shape of the wire attachment portion 74 is not particularly limited, but here is, for example, an annular body, and is formed into a strong structure that can withstand the tensile force of the flexible tube device 5.

  A link mechanism 75 is provided between the substantially conical insertion guide member 73 and the substantially frustoconical insertion guide member 72 and between the substantially frustoconical insertion guide members 71 and 72. The link mechanism 75 between the substantially conical insertion guide member 73 and the substantially frustoconical insertion guide member 72 will be described as an example. On the bottom surface of the insertion guide member 73, a first link portion 76 is formed and inserted. A second link part 77 is formed on the upper surface of the guide member 72. The 1st link part 76 and the 2nd link part 77 are comprised by the annular body, for example, connect the 1st and 2nd link parts 76 and 77 by connecting two annular bodies, and link It looks like a chain. In such a link mechanism 75, a gap that can be freely tilted with respect to the adjacent insertion guide members is provided between the adjacent insertion guide members.

  Such a link mechanism 75 is also provided between the insertion guide members 71 and 72 having a substantially truncated cone shape.

  Further, a link mechanism 78 is also provided between the head cover device 40 and the insertion guide member 71 having a substantially truncated cone shape. The link mechanism 78 is provided with a link portion 79 on the bottom surface of the insertion guide member 71 having a substantially truncated cone shape. The link portion 79 is an annular body such as a hook or a carabiner provided at the center of the bottom surface of the insertion guide member 71 and is attached to the wire attachment member 54 of the head cover device 40. Such a link mechanism 78 is also provided with a gap between the insertion guide member 71 and the head cover device 40 so that the insertion guide member 71 can freely tilt with respect to the adjacent head cover device 40. The link mechanism 78 may be provided with a known drop-off prevention device.

  Even in the insertion guide device 70 as described above, the gap between the insertion guide member 73 having the smallest substantially conical shape on the distal end side to which the wire 4 is attached and the insertion guide member 72 having a substantially truncated cone shape can be freely tilted. The insertion guide member 72 having a substantially frustoconical shape and the largest insertion guide member 71 are freely inclined, and further, the largest insertion guide member 71 and the head cover device 40 are also freely inclined.

  Therefore, also in the insertion guide device 70, the insertion guide members 71, 72, and 73 in the curved pipe portion 1 a of the existing water pipe 1, as shown in FIG. Are arranged so that the outer peripheral surface is in contact with the inner inner surface of the curved pipe portion 1a. When the largest insertion guide member 71 is viewed, the component force P5 that presses the inner surface of the bent tube portion 1a perpendicular to the axis O of the flexible tube device 5 is smaller than P2 of the comparative example, and the flexible tube The component force P6 in the direction of the axis O of the device 5 is larger than P3 of the comparative example. Therefore, even when the insertion guide device 70 is used, the pulling force of the winder 7 such as a winch can be reduced. Thereby, the pipe line update performed by inserting the flexible pipe device 5 into the existing water pipe 1 having the curved pipe portion 1a can be smoothly performed without applying an excessive load to the winder 7 such as a winch. it can.

  In the insertion guide device 70, the number of insertion guide members is not limited to three, but may be one substantially conical insertion guide member, or a substantially conical insertion guide member and a substantially truncated cone shape. Two of the insertion guide members may be used. Further, three or more substantially frustoconical insertion guide members may be used. When three or more substantially frustoconical insertion guide members are used, the truncated cone shape gradually decreases in diameter from the largest insertion guide member 71 on the head cover device 40 side toward the smallest insertion guide member 73 at the tip. A plurality of insertion guide members are inserted between the insertion guide members 71 and 73.

  Further, the substantially conical insertion guide member 73 may be a polygonal pyramid such as a hexagonal pyramid or an octagonal pyramid close to a cone, and the substantially frustoconical insertion guide members 71 and 72 are also formed in a hexagonal frustum shape. A polygonal frustum shape such as an octagonal frustum shape may be used.

  Further, the insertion guide device 70 may be directly attached to the end tube 13 of the flexible tube device 5 without using the head cover device 40.

Further, the opposing surfaces of the insertion guide members 71, 72, 73 may be spherical seating surfaces like the above-described insertion guide members 61, 62, 63. Then, the insertion wire 4b may be inserted into the insertion guide members 71, 72, 73 provided with the spherical seating surface as in the insertion guide device 60.
[Variation 2 of Insertion Guide Device]
Further, the insertion guide device 70 may be configured as shown in FIG. In this example, the insertion guide device 80 is provided with a substantially conical insertion guide member 83 at the tip, and subsequently, the insertion guide members 82 and 81 are formed in a substantially cylindrical shape. The diameter of the bottom surface of the substantially conical insertion guide member 83 and the diameter of the substantially cylindrical insertion guide members 81 and 82 are substantially the same as the diameter of the head cover device 40, that is, the diameter of the flexible tube device 5. It is formed to be slightly larger than the diameter of the pipe device 5.

  In addition, the diameter of the bottom surface of the insertion guide members 81 and 82 may be smaller than the diameter of the head cover device 40 or the diameter of the flexible tube device 5 as long as it is slight.

  The substantially conical insertion guide member 83 located at the tip is formed with a wire attachment portion 84 having an annular shape, for example, for engaging the hook 4c provided at the tip of the winding wire 4a. . The shape of the wire attachment portion 84 is not particularly limited, but here is an annular body, for example, and is formed in a strong structure that can withstand the tensile force of the flexible tube device 5.

  Further, a link mechanism 85 is provided between the substantially conical insertion guide member 83 and the substantially cylindrical insertion guide member 82 and between the substantially cylindrical insertion guide members 81 and 82. The link mechanism 85 between the substantially conical insertion guide member 83 and the substantially cylindrical insertion guide member 82 will be described as an example. On the bottom surface of the insertion guide member 83, a first link portion 86 is formed and inserted. A second link portion 87 is formed on the upper surface of the guide member 82. The 1st link part 86 and the 2nd link part 87 are comprised by the annular body, for example, connect the 1st and 2nd link parts 86 and 87 by connecting two annular bodies, and link It looks like a chain. In such a link mechanism 85, a gap that can be freely tilted with respect to the adjacent insertion guide member is provided between the adjacent insertion guide members.

  Such a link mechanism 85 is also provided between the insertion guide members 81 and 82 having a substantially cylindrical shape.

  Further, a link mechanism 88 is also provided between the head cover device 40 and the substantially cylindrical insertion guide member 81. The link mechanism 88 is provided with a link portion 89 on the bottom surface of the substantially cylindrical insertion guide member 81. The link portion 89 is an annular body such as a hook or a carabiner provided at the center of the bottom surface of the insertion guide member 81 and is attached to the wire attachment member 54 of the head cover device 40. Such a link mechanism 88 is also provided with a gap between the insertion guide member 81 and the head cover device 40 so that the insertion guide member 81 can freely tilt with respect to the adjacent head cover device 40.

  Even in the insertion guide device 80 as described above, the gap between the substantially conical insertion guide member 83 and the substantially cylindrical insertion guide member 82 on the distal end side to which the wire 4 is attached can be freely tilted. Between the columnar insertion guide member 82 and the insertion guide member 81 on the head cover device 40 side is freely tilted, and further, between the insertion guide member 81 and the head cover device 40 is also freely tilted.

  Therefore, in the insertion guide device 80, as in the above-described insertion guide devices 60 and 70, in the curved pipe portion 1a of the existing water pipe 1, the insertion guide members 81, 82, and 83 are as shown in FIG. It arranges so that an outer peripheral surface may contact | connect the inner surface of the inner side of the curved pipe part 1a of the pipe | tube 1. As shown in FIG. When the largest insertion guide member 81 is viewed, the component force P5 that presses the inner surface of the bent tube portion 1a perpendicular to the axis O of the flexible tube device 5 is smaller than P2 of the comparative example, and the flexible tube The component force P6 in the direction of the axis O of the device 5 is larger than P3 of the comparative example. Therefore, even when the insertion guide device 80 is used, the pulling force of the winder 7 such as a winch can be reduced. Thereby, the pipe line update performed by inserting the flexible pipe device 5 into the existing water pipe 1 having the curved pipe portion 1a can be smoothly performed without applying an excessive load to the winder 7 such as a winch. it can.

  In the insertion guide device 80, the number of substantially cylindrical insertion guide members is not limited to two, and only one substantially conical insertion guide member 83 is provided, and the substantially cylindrical insertion guide members are provided. The number may be zero, or the number of substantially cylindrical insertion guide members attached next to the substantially conical insertion guide member 83 may be one, or three or more. Further, as will be described in Modification 3 below, a substantially frustoconical insertion guide member 83 is attached to the substantially conical insertion guide member 83, and then one or more substantially cylindrical insertion guide members are connected. May be.

  Further, the substantially conical insertion guide member 83 may be a polygonal pyramid such as a hexagonal pyramid or an octagonal pyramid close to a cone, and in accordance with this, the substantially cylindrical insertion guide members 81 and 82 are also hexagonal columns, It may be a polygonal column such as an octagonal column.

  Further, the opposing surfaces of the insertion guide members 81, 82, 83 may be spherical seating surfaces like the above-described insertion guide members 61, 62, 63. Then, the insertion wire 81 b may be inserted into the insertion guide members 81, 82, 83 having the spherical seating surface as in the insertion guide device 60.

Further, the insertion guide device 80 may be directly attached to the end tube 13 of the flexible tube device 5 without using the head cover device 40.
[Variation 3 of Insertion Guide Device]
Further, the insertion guide device 80 may be configured as shown in FIG. In this example, the insertion guide device 90 is provided with a substantially conical insertion guide member 93, followed by an insertion guide device 92 having a substantially truncated cone shape, and a final insertion guide member 91 having a substantially cylindrical shape. ing. Here, the diameter of the bottom surface of the substantially frustoconical insertion guide member 92 and the diameter of the substantially columnar insertion guide member 91 are substantially the same as the diameter of the head cover device 40, that is, the diameter of the flexible tube device 5 or flexible tube. It is formed to be slightly larger than the diameter of the device 5.

  Note that the diameter of the bottom surface of the insertion guide member 91 may be smaller than the diameter of the head cover device 40 or the diameter of the flexible tube device 5 as long as it is slight.

  The substantially conical insertion guide member 93 located at the distal end is formed with, for example, an annular wire attachment portion 94 for engaging the hook 4c provided at the distal end of the winding wire 4a at the distal end. . The shape of the wire attachment portion 94 is not particularly limited, but here is, for example, an annular body, and is formed into a strong structure that can withstand the tensile force of the flexible tube device 5.

  A link mechanism 95 is provided between the substantially conical insertion guide member 93 and the substantially frustoconical insertion guide member 92 and between the substantially frustoconical insertion guide member 92 and the substantially cylindrical insertion guide member 93. Is provided. Here, the link mechanism 95 is a multi-degree-of-freedom link mechanism, and one of the insertion guide members adjacent to each other rotates about the axis with respect to the other.

  The link mechanism 95 between the substantially conical insertion guide member 93 and the substantially frustoconical insertion guide member 92 will be described as an example. The bottom of the insertion guide member 93 and the approximate center of the top surface of the insertion guide member 92 are, for example, Ball bearings 96 and 96 are provided with a roller sandwiched between a pair of housings. One housing is fixed to the bottom surface of the insertion guide member 93 and the top surface of the insertion guide member 92, and a flexible link wire 97 is attached to the other housing. In such a link mechanism 95, the link wire 97 can be bent to freely tilt with respect to the adjacent insertion guide member. Further, the link wire 97 can be prevented from being twisted. Such a link mechanism 95 is also provided between the substantially frustoconical insertion guide member 92 and the substantially cylindrical insertion guide member 93.

  Further, a link mechanism 98 is also provided between the head cover device 40 and the substantially cylindrical insertion guide member 91. In the link mechanism 98, a link portion 99 is provided on the bottom surface of the substantially cylindrical insertion guide member 91. The link portion 99 is an annular body such as a hook or a carabiner provided at the center of the bottom surface of the insertion guide member 91 and is attached to the wire attachment member 54 of the head cover device 40. Such a link mechanism 98 is provided with a gap between the insertion guide member 91 and the head cover device 40 so that the insertion guide member 91 can freely tilt with respect to the adjacent head cover device 40.

  Even in the insertion guide device 90 as described above, there is a link between the insertion guide member 93 on the distal end side to which the wire 4 is attached and the intermediate insertion guide member 92 and between the insertion guide member 92 and the insertion guide member 91. When the wire 97 is bent, the wire 97 is freely tilted, and the insertion guide member 91 and the head cover device 40 are also freely tilted. In particular, since ball bearings 96, 96 are provided between the insertion guide members 91, 92 and between the insertion guide members 92, 93, the adjacent insertion guide members are rotated, so that the link wire The twist of 97 is eliminated, and it is possible to tilt more freely.

  Therefore, also in the insertion guide device 90, as in the above-described insertion guide devices 60, 70, 80, in the curved pipe portion 1a of the existing water pipe 1, the insertion guide members 91, 92, 93 are as shown in FIG. It arranges so that an outer peripheral surface may contact | connect the inner surface of the inner side of the curved pipe part 1a of the existing water pipe 1. FIG. When the largest insertion guide member 91 is viewed, the component force P5 that presses the inner surface of the bent tube portion 1a perpendicular to the axis O of the flexible tube device 5 is smaller than P2 of the comparative example, and the flexible tube The component force P6 in the direction of the axis O of the device 5 is larger than P3 of the comparative example. Therefore, even when the insertion guide device 90 is used, the pulling force of the winder 7 such as a winch can be reduced. Thereby, the pipe line update performed by inserting the flexible pipe device 5 into the existing water pipe 1 having the curved pipe portion 1a can be smoothly performed without applying an excessive load to the winder 7 such as a winch. it can.

  In the insertion guide device 90, the number of substantially cylindrical insertion guide members attached to the head cover device 40 is not limited to one, and may be two or more. Two or more substantially frustoconical insertion guide members may be provided. In addition, the substantially conical insertion guide member 93 may be a polygonal pyramid such as a hexagonal pyramid or an octagonal pyramid that is close to a cone. A polygonal pyramid trapezoid such as a trapezoid may be used, and the substantially cylindrical insertion guide member may be a polygonal column such as a hexagonal column or an octagonal column.

  Further, the insertion guide device 90 may be directly attached to the end tube 13 of the flexible tube device 5 without using the head cover device 40.

Further, the opposing surfaces of the insertion guide members 91, 92, and 93 may be spherical seating surfaces like the above-described insertion guide members 61, 62, and 63. Then, the insertion wire 4b may be inserted into the insertion guide members 91, 92, and 93 having the spherical seating surface as in the insertion guide device 60.
[Other variations]
In the present invention, the insertion guide members are coupled to each other by combining the wire 4 as in the insertion guide device 60 with a link portion as shown in the insertion guide devices 70, 80, and 90. You may do it. For example, the insertion guide members from the distal end side to the second insertion guide member may be connected through the inside, and the third and subsequent insertion guide members may be connected by the link portion.

  The pipe renewal method using the insertion guide devices 60, 70, 80, 90 described above is applicable to the pipe renewal of the existing water pipe 1, as well as existing pipes for flowing other liquids other than tap water, city gas The present invention can also be applied to renewal of pipes such as existing pipes through which a gas such as a cooling gas flows, or existing pipes through which a fluid made of a solid such as powder, granules or gels flows.

DESCRIPTION OF SYMBOLS 1 Existing water pipe, 1a Curved pipe part, 2 Start shaft, 3 Arrival shaft, 4 Wire, 4a Winding wire, 4b Medium wire, 4c Hook, 4d Ring part, 4e Ring part, 5 Flexible pipe device Drum, 7 hoisting machine, 8 1st water pipe, 9 2nd water pipe, 11 bellows pipe, 11a bellows main body, 11b connection part, 12 blade, 13 end pipe, 15a-15c welding location, 16 rod member, 17 Blade pressing member, 18 Rust prevention tape, 19 Protection tape, 20 Stop ring, 21 Groove, 22 Stopper part, 23 Flange member, 23a Insertion hole, 24 Detachment prevention member, 25 Insertion, 26 Fall prevention piece, 27 Through Hole, 28 Receptacle, 29 Sealing member, 31 Receptacle part, 32 Coupling part, 33 Large diameter pipe part, 34 Straight pipe part, 35 Connecting pipe part, 36 Taper part 37 through-hole, 38 bolt, 39 nut, 40 head cover device, 41 cover body, 41a first half, 41b second half, 42 wire attachment portion, 42a wire attachment piece, 42b wire attachment piece, 43 connection portion , 43a First locking portion, 43b Second locking portion, 44a, 44b Abutting surface, 45a First through hole, 45b Second through hole, 46a First coupling hole, 46b Second coupling Hole, 47 bolt, 48 circular hole, 49a first coupling hole, 49b second coupling hole, 51 coupling member, 52a first mounting hole, 52b second mounting hole, 53 bolt, 54 wire mounting member, 55a First mounting hole, 55b Second mounting hole, 56 bolt, 60 insertion guide device, 61-63 insertion guide member, 61a-63a insertion hole, 61b, 61c, 62b, 2c, 63b Spherical bearing surface, 70 Insertion guide device, 71-73 Insertion guide member, 74 Wire attachment portion, 75 Link mechanism, 76, 77 Link portion, 78 Link mechanism, 79 Link portion, 80 Insertion guide device, 81- 83 Insertion guide member, 84 Wire attachment portion, 85 Link mechanism, 86, 87 Link portion, 88 Link mechanism, 89 Link portion, 90 Insertion guide device, 91-93 Insertion guide member, 94 Wire attachment portion, 95 Link mechanism, 96 Ball bearing, 97 link wire, 98 link mechanism, 99 link part

Claims (11)

In the insertion guide device in the existing pipe of the flexible pipe drawn into the existing pipe by connecting the wire passed through the existing pipe directly or indirectly to the insertion end of the flexible pipe and winding the wire,
It has a diameter that is substantially the same as or slightly larger than that of the flexible tube, and an outer peripheral surface that is in contact with the inner surface of the existing tube includes a substantially curved insertion guide member,
When the flexible tube is pulled by the insertion guide member being directly or indirectly connected to the insertion end of the flexible tube through the wire, the bent tube portion of the existing tube The flexible tube insertion guide apparatus is configured to be inclined with respect to the flexible tube so as to follow the inner surface of the bent tube portion. There are a plurality of insertion guide members, each of which has a different diameter
An insertion guide member having a diameter substantially the same as or slightly larger than that of the flexible tube, the wire is passed through, and is positioned in the immediate vicinity of the insertion end of the flexible tube,
The further insertion guide member is attached through the wire so that the diameter gradually decreases from the insertion guide member having the same or slightly larger diameter as the flexible tube toward the distal end side, and the distal end is the smallest. It becomes an insertion guide member,
The insertion guide members adjacent to each other through which the wire is threaded have opposing surfaces that are spherical seating surfaces,
When the flexible tube is pulled, the plurality of insertion guide members are inclined with respect to the adjacent insertion guide members so as to follow the inner surface of the inner side of the curved pipe portion in the curved pipe portion of the existing pipe. The flexible tube insertion guide device according to claim 1. The wire is formed by connecting a winding wire wound up by a hoisting machine and a threading wire inserted through the insertion guide member,
One end of the winding wire is provided with a hook,
An engagement portion that is engaged with the hook is formed at the end of the centering wire connected to the winding wire, and the flexible tube insertion end is formed at the end of the flexible tube. The insertion guide device for a flexible tube according to claim 1, further comprising a connecting portion connected directly or indirectly to the flexible tube. In the insertion guide device in the existing pipe of the flexible pipe drawn into the existing pipe by connecting the wire passed through the existing pipe directly or indirectly to the insertion end of the flexible pipe and winding the wire,
It has a diameter that is substantially the same as or slightly larger than that of the flexible tube, and an outer peripheral surface that is in contact with the inner surface of the existing tube includes a substantially curved insertion guide member,
In the insertion guide member, the wire is connected to the distal end side, and the flexible tube is pulled by being directly or indirectly connected to the insertion end of the flexible tube via a link portion. A flexible tube insertion guide device configured to be inclined with respect to the flexible tube so as to follow the inner surface of the curved tube portion in the bent tube portion of the existing tube. The insertion guide member is plural, one is substantially conical, and the other is substantially frustoconical,
The substantially conical insertion guide member has the smallest bottom diameter,
Among the substantially frustoconical insertion guide members, the largest insertion guide member has a bottom surface that is substantially the same as or slightly larger in diameter than the flexible tube,
The largest substantially frustoconical insertion guide member is connected to the insertion end of the flexible tube directly or indirectly by the link part,
The substantially conical insertion guide member is connected to the adjacent substantially frustoconical insertion guide member by the link part and the wire is connected to the distal end side.
A further substantially frustoconical insertion guide member is selectively connected by the link part between the largest substantially frustoconical insertion guide member and the substantially conical insertion guide member.
The further substantially frustoconical insertion guide member is connected by the adjacent insertion guide member and the link portion so as to gradually decrease from the largest substantially truncated cone-shaped insertion guide member toward the distal end side,
When the flexible tube is pulled, the plurality of insertion guide members are inclined with respect to the adjacent insertion guide members so as to follow the inner surface of the inner side of the curved pipe portion in the curved pipe portion of the existing pipe. The flexible tube insertion guide device according to claim 4. The insertion guide member is plural, the insertion guide member located on the most distal side is substantially conical, and the other insertion guide members are substantially columnar,
The substantially conical insertion guide member has a bottom surface substantially the same as or slightly larger in diameter than the flexible tube, and the wire is connected to the distal end side,
The substantially cylindrical insertion guide member has a diameter substantially the same as or slightly larger than the diameter of the flexible tube,
The substantially conical insertion guide member and the substantially cylindrical insertion guide member are connected by the link part,
Between the substantially conical insertion guide member and the substantially cylindrical insertion guide member, a further substantially cylindrical insertion guide member is selectively connected by the link portion,
When the flexible tube is pulled, the plurality of insertion guide members are inclined with respect to the adjacent insertion guide members so as to follow the inner surface of the inner side of the curved pipe portion in the curved pipe portion of the existing pipe. The flexible tube insertion guide device according to claim 4. When the insertion guide device is indirectly attached to the insertion end of the flexible tube, a head cover for protecting the insertion end of the flexible tube is attached to the insertion end of the flexible tube,
The flexible tube insertion guide device according to any one of claims 1 to 6, wherein the insertion guide device is attached to a further distal end side of the head cover. In the insertion guide device in the existing pipe of the flexible pipe drawn into the existing pipe by connecting the wire passed through the existing pipe directly or indirectly to the insertion end of the flexible pipe and winding the wire,
It has a diameter that is substantially the same as or slightly larger than that of the flexible tube, and an outer peripheral surface that is in contact with the inner surface of the existing tube includes a substantially curved insertion guide member,
The insertion guide member is directly or indirectly connected to the insertion end of the flexible tube, so that when the flexible tube is pulled by the wire, the bending guide member is bent at the bent tube portion of the existing tube. An insertion guide device for a flexible tube that is inclined with respect to the flexible tube so as to follow the inner surface of the inside of the tube portion. A start shaft and a reach shaft are provided so that the existing pipes buried are exposed,
Pass the wire from the reach shaft through the existing pipe to the start shaft,
Connecting the wire directly or indirectly to the insertion end of a flexible tube inserted into the existing tube,
In the pipeline renewal method in which the wire is wound up on the reach shaft side and the flexible pipe is drawn into the existing pipe.
An insertion guide device is directly or indirectly attached to the insertion end of the flexible tube, and the flexible tube to which the insertion guide device is attached is drawn into the existing tube,
The insertion guide device includes an insertion guide member having a substantially same or slightly larger diameter as the flexible tube, and an outer peripheral surface in contact with the inner surface of the existing tube having a substantially curved surface.
When the flexible tube is pulled by the insertion guide member being directly or indirectly connected to the insertion end of the flexible tube through the wire, the bent tube portion of the existing tube The conduit renewal method in which it is inclined with respect to the flexible tube so as to follow the inner inner surface of the bent tube portion. A start shaft and a reach shaft are provided so that the existing pipes buried are exposed,
Pass the wire from the reach shaft through the existing pipe to the start shaft,
Connecting the wire directly or indirectly to the insertion end of a flexible tube inserted into the existing tube,
In the pipeline renewal method in which the wire is wound up on the reach shaft side and the flexible pipe is drawn into the existing pipe.
An insertion guide device is directly or indirectly attached to the insertion end of the flexible tube, and the flexible tube to which the insertion guide device is attached is drawn into the existing tube,
The insertion guide device includes an insertion guide member having a substantially same or slightly larger diameter as the flexible tube, and an outer peripheral surface in contact with the inner surface of the existing tube having a substantially curved surface.
In the insertion guide member, the wire is connected to the distal end side, and the flexible tube is pulled by being directly or indirectly connected to the insertion end of the flexible tube via a link portion. A pipe renewal method in which the bent pipe portion of the existing pipe is inclined with respect to the flexible pipe so as to follow the inner surface on the inner side of the bent pipe portion. A start shaft and a reach shaft are provided so that the existing pipes buried are exposed,
Pass the wire from the reach shaft through the existing pipe to the start shaft,
Connecting the wire directly or indirectly to the insertion end of a flexible tube inserted into the existing tube,
In the pipeline renewal method in which the wire is wound up on the reach shaft side and the flexible pipe is drawn into the existing pipe.
An insertion guide device is directly or indirectly attached to the insertion end of the flexible tube, and the flexible tube to which the insertion guide device is attached is drawn into the existing tube,
The insertion guide device includes an insertion guide member having a substantially same or slightly larger diameter as the flexible tube, and an outer peripheral surface in contact with the inner surface of the existing tube having a substantially curved surface.
The insertion guide member is directly or indirectly connected to the insertion end of the flexible tube, so that when the flexible tube is pulled by the wire, the bending guide member is bent at the bent tube portion of the existing tube. A pipe line renewal method that is inclined with respect to the flexible pipe so as to follow the inner surface of the inside of the pipe section.

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