JPH03213786A - Wire material separating tool used in lining construction method for already constructed pipe - Google Patents

Abstract

PURPOSE:To prevent a spiral tube from being broken or destroyed, by making a spiral tube in the state where a wire material is installed on each side edge part of a strip-shaped body and pulling the wire material nearly in the radial direction of the spiral tube and separating the wire material. CONSTITUTION:When the diameter of a spiral tube 10' is spread, a wire material separating tool 40 is arranged, positioning a guide member 43 on a pipe making machine 20 side. A winding-up device 50 is driven to wind up a strip-shaped wire material 30 in succession so as to be separated from the spiral tube 10', and the diameter of the spiral tube 10' is spread. When the strip-shaped wire material 30 is separated from the spiral tube 10', the wire material 30 is set nearly along the radial direction of the spiral tube 10'. Accordingly, the diameter spreading work for the spiral tube can be carried out smoothly, and the working efficiency can be improved drastically.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a jig used in an existing pipe lining method carried out when rehabilitating aged existing pipes. A helical tube manufactured by winding a synthetic resin band in a spiral shape and locking a wire to the side edge of the band is inserted into an existing pipe, and the wire is removed from the inserted helical tube. The present invention relates to a wire rod detachment tool used for separating a wire rod from a helical pipe in an existing pipe lining construction method in which the helical pipe is lined in a state in which the helical pipe is substantially in contact with the existing pipe.

(Conventional technology) Old metal pipes and humid pipes are used as underground pipes for water and sewerage systems.

Such buried pipes become obsolete after long-term use, and there is a risk that they may crack or corrode, leading to water leakage.

For this reason, recently, lining pipes made of synthetic resin are inserted into existing pipes such as aged buried pipes to line the pipes.

One method for lining existing pipes is to line existing pipes with a spiral pipe that is manufactured by spirally winding a synthetic resin band. This method is disclosed, for example, in Japanese Patent Laid-Open No. 61-48690. The method disclosed in this publication is carried out by installing a pipe making machine capable of manufacturing a spiral pipe opposite the end opening of an existing pipe.

The pipe-making machine is sequentially supplied with synthetic resin strips whose side edges can engage with each other, and the pipe-making machine winds the strips in a helical manner, and by the winding. A helical tube is sequentially manufactured by engaging the side edges of adjacent strips. The spiral tube manufactured by the pipe making machine is sequentially
It is led out from the pipe making machine while rotating. Then, the spiral pipe led out from the pipe making machine is directly introduced into the existing pipe,
It is propelled while rotating within the existing pipe. When the spiral tube is inserted over substantially the entire area of the existing pipe, a filling material such as cement mortar is filled between the spiral tube and the existing pipe to fix the spiral tube within the existing pipe. As a result, the existing pipe is lined with the spiral pipe.

As the material of the band-shaped body which is a spiral tube, a flexible synthetic resin such as polyvinyl chloride, polyethylene, polypropylene, etc. is used. The strip usually has a convex line continuous in the longitudinal direction on one side edge, and a concave line continuous in the longitudinal direction on the other side edge with which the convex line can engage. It is set up as follows. When the strip is wound spirally, the protrusions are fitted into the grooves on the side edges of adjacent strips to form a helical tube.

(Problems to be Solved by the Invention) In such a lining construction method, a spiral pipe inserted into an existing pipe is propelled through the existing pipe while rotating. Therefore, when a helical tube having an outer diameter slightly smaller than the inner diameter of the existing pipe is inserted into the existing pipe, the outer circumferential surface of the helical tube tends to come into contact with the inner circumferential surface of the existing pipe, and a large resistance is applied to the helical tube. A tube-making machine that manufactures spiral tubes is supplied with strips one after another.
Because the pipe-making machine applies propulsive force to the spiral pipe,
If resistance is applied to the manufactured helical tube, the helical tube will no longer be propelled through the existing pipe. In this state, when a propulsive force is applied to the strip in the spiral tube, the mutually fitted protrusions and grooves start to slide, and the diameter of the spiral tube increases. Then, the contact resistance between the helical pipe and the existing pipe becomes even greater, and the helical pipe cannot be propelled through the existing pipe at all.

For this reason, in conventional lining construction methods, in order to prevent almost the entire outer peripheral surface of the spiral pipe from coming into contact with the inner peripheral surface of the existing pipe, the inner diameter of the spiral pipe is made sufficiently smaller than the inner diameter of the existing pipe. Progress is being made. Therefore,
In existing pipes that have been lined using the conventional lining method, the part through which fluid flows (inside the spiral pipe) is significantly smaller than the original part through which fluid flows (inside the existing pipe).
The flow rate of fluid after lining is significantly lower than the flow rate of fluid before lining.

Furthermore, if the difference in the inner diameter between the existing pipe and the spiral pipe becomes large, the spiral pipe will be tilted relative to the existing pipe, so backfilling material such as cement mortar should be filled between the existing pipe and the spiral pipe. The spiral pipe must be fixed to the existing pipe. When the difference in inner diameter between the existing pipe and the spiral pipe becomes large, a large amount of backfilling material is required, which makes the backfilling work very time-consuming and impairs economic efficiency.

In order to solve this problem, when winding a strip around a helical tube, a wire is inserted between the engaged side edges of the strip so that the sides of the engaged strip can be wrapped around the helical tube. Methods have been developed to increase edge-to-edge resistance.

If a helical tube is manufactured in this way, the resistance between the side edges of the strip forming the helical tube will increase due to the wire.
A small diameter helical tube is manufactured. After inserting the small diameter spiral tube manufactured in this way into the existing pipe,
If the wire rod is separated from between the engaged side edges of the strip material while supplying the strip material to the pipe making machine and applying a propulsive force to the strip material constituting the spiral tube, the wire material can be detached. The side edges of each band-shaped body sequentially slide from one section to another, and the spiral tube expands in diameter while rotating. Then, the diameter-expanded spiral tube comes into almost contact with the inner circumferential surface of the existing tube.

In this way, if the wire rods are sequentially removed from the helical tube that has been pushed through the existing pipe to expand its diameter, the helical tube will come into contact with the entire inner circumferential surface of the existing pipe.

When removing a wire from a helical tube, if the wire is always pulled in the radial direction of the helical tube, the wire can be easily removed from the helical tube without damaging the helical tube. Ru. However, devices where the wire is made of a spiral tube,
Since the wire is sequentially moved in the axial direction of the helical tube, there is a possibility that the wire rod may be detached from the radial direction of the helical tube in a tilted state in the axial direction of the helical tube. If the wire rod is detached from the helical tube in a state where it is tilted in the axial direction with respect to the radial direction, there is a risk that the helical tube may be damaged or damaged by the wire rod. In addition, if the diameter-expanded part of the helical tube and the part from which the wire is removed from the helical tube are in a predetermined relationship, the diameter of the helical tube will be expanded smoothly, but the relative position of the two If it deviates from a predetermined state, there is a possibility that the diameter of the helical tube will not be expanded.

The present invention solves the above-mentioned conventional problems, and its purpose is to remove the wire from a helical tube inserted into an existing pipe with a predetermined diameter by inserting a wire on each side of the strip. To provide a wire rod detachment tool which can set a wire rod detachment part at a predetermined position with respect to the diameter enlargement part when expanding the diameter thereof, and can therefore reliably bring a helical tube into a predetermined diameter enlarged state. be.

(Means for Solving the Problems) The wire rod detachment tool of the present invention involves winding a band-shaped body in a spiral shape so that mutually adjacent side portions are engaged with each other, and the wire rod is inserted between the engaging portions. A method of manufacturing an existing pipe by inserting the spiral pipe into the existing pipe, and then removing the wire from the spiral pipe to expand the diameter of the spiral pipe so that it is almost in contact with the existing pipe. A wire rod separation tool used in the lining method for separating a wire rod from a spiral tube, in which the wire rod placed inside the spiral tube and separated from the spiral tube is in a state along the axial direction of the spiral tube. When the wire is wound up, it is sequentially moved in the axial direction of the spiral tube, and the wire is moved in the axial direction from the radial direction of the spiral tube. a control member having a means for regulating the movement of the wire by tilting the wire by a predetermined amount; and a stopper that is locked to the part that has become, thereby achieving the above object.

(Example) The present invention will be described below with reference to Examples.

The wire rod detachment tool of the present invention, for example, as shown in FIG.
The existing concrete sewer pipe 81 is converted into a spiral pipe 10.
Used in the lining method of lining and rehabilitation. In this lining construction method, first, a synthetic resin band 10 is made into a spiral pipe lO° using a pipe making machine 20. The pipe making machine 20 is installed in a manhole 82 to which one end of a sewage pipe 81 is connected, and the manufactured spiral pipe 10'
are sequentially introduced into the sewer pipe 81. At this time, the spiral pipe 10° has an outer diameter sufficiently smaller than the inner diameter of the drain pipe 81 so that at least the portion other than the bottom portion does not come into contact with the inner circumferential surface of the drain pipe 81.

The strip 10 formed into a spiral tube 10' has a cross-sectional shape as shown in FIG. The strip 10 is made of polyvinyl chloride, polyethylene, polypropylene, polycarbonate,
It is molded from materials such as polyester, mulberry resin, or resins made by reinforcing these resins with glass fiber.

The strip-shaped body 10 has a strip-shaped substrate 12 . The strip-shaped substrate 12 has, near one side 12a extending in the longitudinal direction,
A fitting protrusion 13 erected along the longitudinal direction of the substrate 12
has. The side surface 12a of the substrate I2 in the vicinity of the fitting protrusion I3 is gradually formed into an outwardly protruding inclined surface as it becomes a side surface opposite to the side surface on which the fitting protrusion 13 is disposed. It has become. The fitting protrusion 13 has a support portion 13a that is slightly longer than the thickness of the substrate 12, and an insertion portion 13b having a semicircular cross section provided at the tip of the support portion 13a. The upper surface of the insertion portion 13b protrudes in an arc shape, and each side portion of the lower portion thereof serves as a locking portion 13c that protrudes to each side of the column portion 13a.

The substrate 1 on the opposite side from the side edge on which the fitting protrusion 13 is erected.
When the substrate 12 is spirally wound, the side edge of
The fitting protrusion 13 is formed by the thickness of the substrate 12 so that the portion of the substrate 12 between the one side surface 12a of the substrate 12 on the fitting protrusion 13 side and the base end of the fitting protrusion 13 can be fitted. A stepped portion 14 is formed on the protruding side. In the protective film falling part 14,
A fitting groove 15 having a semicircular cross section and a space having a semicircular cross section into which the insertion portion 13b of the fitting protrusion 13 described above can fit is arranged along the longitudinal direction of the substrate 12. It is provided so as to protrude in the same direction as 13. A pair of locking portions 15a and 1 are provided on the inner circumferential surface of the proximal end of the fitting concave shape 15, with which each locking portion 13c in the insertion portion Hb of the fitting projection 13 can lock.
5a are arranged so as to protrude into the semicircular space, respectively. The insertion portion 13b of the fitting protrusion 13 is smoothly inserted into the fitting groove 15 from its arc-shaped peripheral surface, and the fitting protrusion 13 is engaged with the locking portion 15a of the fitting groove 15. By locking the stop portion 13c, the insertion portion 13b of the fitting protrusion 13 is prevented from being removed from the space of the fitting groove 15.

Insertion part 13 of fitting protrusion 13 inserted into fitting groove 15
b can slide within the fitting groove 15. When the insertion part 13b of the fitting protrusion 13 is inserted into the fitting groove 15, the side surface 12a of the substrate 12 fitted in the protective film falling part 14 is on the same side as the step falling part 14. A slight gap will be left.

At the outer side edge of the stepped portion 14 where the fitting groove 15 is disposed, there is a pressing portion 16 that is inclined toward the protruding side of the fitting groove 15 with respect to the substrate 12 toward the outside. They are installed consecutively. Between the fitting protrusion 13 and the fitting groove 15 on the substrate 12, a plurality of reinforcing ribs 19 each having a T-shaped cross section are provided.
They are erected along the longitudinal direction of the substrate 12 at appropriate intervals. Each reinforcing lip 19 has a support portion 19a that is orthogonal to the substrate 12, and a substrate 1 at the tip of the support portion 19a.
2 has a flange portion 19b that is parallel to the supporting column portion 19a, and the length of the support portion 19a is slightly longer than the thickness of the substrate 12. The reinforcing rib 19 adjacent to the fitting protrusion 3 is the insertion part of the fitting protrusion 13! 3b is inserted into the fitting groove 15, the pressing portion 1 disposed adjacent to the fitting groove 15
The tip of the reinforcing lip 19 comes into contact with the flange portion 19b of the reinforcing lip 19.

Such a strip body IO includes a fitting protrusion I3 and a reinforcing lip 19.
, is spirally wound so that the surface side of the substrate 12 on which the fitting groove 15 is erected is on the outer peripheral side, and the insertion portion 13b of the fitting groove 13 is fitted into the space within the fitting groove 15. By doing so, it becomes a spiral tube with a predetermined diameter.

Such a strip-shaped body 10 is wound around a drum and placed on the ground near the manhole 82, and the strip-shaped body 10 is sequentially unwound from the drum, as shown in FIG.
The pipe making machine 20 installed in the manhole 82 makes a spiral pipe lO°. The pipe making machine 20 forcibly bends the strip 10 introduced into the pipe making machine 20 by pipe making rollers 21 disposed on the cylindrical circumferential surface with a predetermined helical angle. , the strip 10 is wound spirally. As shown in FIG. 4, the fitting protrusion of the strip 10 newly introduced into the pipe making machine 20 is inserted into the space within the fitting groove 15 of the helically wound strip 10. The insertion portion 13b of the strip 13 is inserted.

When the insertion portion 13b of the fitting protrusion 13 is inserted into the space within the fitting groove 15, the locking portion of the insertion portion 13b! 3c is locked to the locking portion 15a of the fitting groove 15, removal is prevented, and the side edge surfaces of the mutually adjacent strips 10 are locked. At this time, the fitting groove 1 disposed in the stepped portion 14
The tip of the pressing portion 16 connected to the fitting protrusion 13
It is located between the flange 19a of the reinforcing rib 19 adjacent to the base plate 12.

In this lining construction method, the strip 10 newly introduced into the pipe making machine 20 is inserted into the space of the fitting groove 15 of the strip 10 spirally wound by the pipe making machine 20. When the insertion portion 13b of the fitting protrusion 13 is fitted, the fitting protrusion on the substrate 12 fitted into the stepped portion 14 on which the fitting groove 15 is disposed and the protective film falling portion 14. A strip wire 30 is interposed between the surface facing the side edge on the side where the strip 13 is disposed.

The band-shaped wire rod 30 is attached to the end surface 1 on the substrate 12 side within the stepped portion 14.
One side thereof is located between the facing surfaces of the protective film falling part 2a and the protective film falling part 14. The band-shaped wire rod 30 is constructed by, for example, a large number of glass fibers extending in the longitudinal direction as tensile members arranged in parallel in the width direction in a synthetic resin made of a softer material than the band-shaped body 10. The width of the strip wire 30 is preferably as large as possible, but it is usually about the distance (3 to 6 m) between the side surface 12a of the substrate 12 engaged in the stepped portion 14 and the fitting protrusion 13. . The thickness of the band-shaped wire 3o is the support portion 13a of the fitting protrusion 13 (slightly larger than the thickness of the substrate 12).
It is set to be slightly larger than the difference between the thickness of the substrate 12 and the thickness of the substrate 12, which is about 1 to 2 m.

By setting the softness and thickness of the surface of the strip wire 300 in this way, even if the surface of the strip 1o is wet with rain or sewage, the manufactured spiral pipe 0° will maintain the predetermined shape. can be held sufficiently and propelled through the existing pipe 81 without any hindrance.

When inserting the insertion portion 13b of the fitting protrusion 13 into the space of the fitting concave line 15, the strip wire 30 is inserted into the side edge of the substrate 12 adjacent to the fitting protrusion 13 and the inclined side surface 12a. located along the Then, the insertion portion 13b of the fitting protrusion 13
When inserted into the space of the fitting groove 15, the strip wire 3
0 is sandwiched between the stepped part 14 and the side edge and side surface 12a of the substrate 12 fitted in the protective film part 14.

The negative side portion of the strip wire 30 is located between the inclined side surface 12a of the substrate 12 and the opposing surface of the stepped portion 14.

The strip-shaped wire rod 30 has the stepped part 14 and the side edge of the substrate 12 fitted in the protective film dropped part 14 in an inclined state, and is inserted into the fitting concave line 15 of the fitting protrusion 13. The locking portion 13c on the side surface 12a side of the substrate 12 in the portion 13b is strongly locked to the locking portion 15a of the fitting groove 15. This results in
A portion of the substrate 12 between the fitting protrusion 13 and the reinforcing rib 19 adjacent to the fitting protrusion 13 is strongly surface-pressed to the surface facing the stepped part work 4, and a spirally wound band-shaped portion is formed. The side edges of the body 10 are firmly locked together. At this time, the stepped part 1
The tip of the pressing part 16 connected to the 4 is locked to the flange 19b of the reinforcing rib 19 adjacent to the fitting protrusion 13, and the protective film falling part 14 is fitted into the board falling part I4. 12, the side edges of the spiral tube 10 are more firmly locked together. The insertion portion 13b of the fitting protrusion 13 inserted into the fitting groove 15 is connected to its locking portion 13c.
By being locked by the locking portion 15a of the fitting groove 15, removal from the fitting groove 15 is prevented. As a result, the helical pipe 10' manufactured by the pipe making machine 20 is propelled through the sewer pipe 81 without expanding in diameter and maintained at a predetermined diameter.

In this way, when the helical tube 10° in which the side edges of the adjacent strips 10 are firmly connected is manufactured, the helical tube 10° is directly lowered from the pipe making machine 20. It is inserted into the water pipe 81. The spiral pipe 10° is connected to the sewer pipe 81.
It is propelled in the axial direction while rotating. At this time, since the outer diameter of the helical pipe 10° is sufficiently smaller than the inner diameter of the sewer pipe 81, the helical pipe 10° except for the bottom part is connected to the sewer pipe 81.
It is smoothly propelled inside the sewer pipe 81 without almost contacting the inner circumferential surface. Furthermore, even if the spiral pipe 10 comes into contact with the inner peripheral surface of the sewer pipe 81, since its diameter is small, the resistance that the spiral pipe 10' receives from the inner peripheral surface of the sewer pipe 81 is small.
0° promotes smooth movement inside the sewer pipe 81. When the tip of the spiral pipe 10° in the propulsion direction reaches the end of the sewer pipe 81, as shown in FIG.
0° production is temporarily stopped, and the strip wire 30 at the tip of the helical tube 10° is removed by a predetermined amount from the helical tube 10°, and is rotated in the opposite direction to the direction in which the helical tube 10° is rotated during pipe manufacturing. The diameter of the tip of the spiral pipe 10' is expanded by rotating it manually, and the tip is fixed to the end of the sewer pipe 81.

In this state, the pipe making machine 20 is driven again, the strip 10 is fed to the pipe making machine 20, and a propulsive force is applied to the strip 10 constituting the spiral pipe 10. At this time, at the same time as the pipe making machine 20 is driven, the stepped portion 14 at the helical pipe lO°
and the side edge of the substrate 12 that is engaged in the protective film falling portion 14, and the strip wire 30 is sequentially removed from the side where the spiral tube 10° is fixed.

As a result, there is a gap between the stepped part 14 of the spiral tube 10° and the part of the substrate 12 inside the protective film dropped part 14,
The strong crimped state between the stepped part 14 and the side edge of the substrate 12 in the protective film part 14 is released, and the insertion part 13b of the fitting protrusion 13 is inserted into the fitting groove 15. is in a state where it can smoothly slide within the fitting groove 15. When the pipe making machine 20 is driven, a propulsive force is applied to the strip of spiral pipe 10' that is pushed through the sewer pipe 81, and the tip of the spiral pipe 10' is fixed to the sewer pipe 81. Therefore, the spiral tube 1
The fitting groove 15 of the band-shaped body at 0° and the insertion portion 13b of the fitting protrusion 13 fitted into the fitting groove 15 slide against each other, and the helical tube 10'' is fixed. The diameter of the helical pipe 10' is expanded sequentially from the tip side.The spiral pipe 10'' whose diameter has been expanded changes from a truncated conical shape with a tapered diameter to a state in which it is in close contact with the inner circumferential surface of the sewer pipe 81.

In this way, when the spiral pipe 10' is expanded in diameter and brought into close contact with the inner circumferential surface of the sewer pipe 81, in order to ensure that the strip wire 30 is separated from the spiral pipe 10', as shown in FIG. To,
The wire rod detachment tool 40 of the present invention is used, which is disposed within the helical tube 10° and pulls the strip wire rod 30 in the direction in which the strip wire rod 30 is removed.

The wire rod detachment tool 40, as shown in FIG.
A control member 41 is positioned in the helical tube 10' so as to face the part from which the strip wire rod 30 is removed from the helical tube 10', and the control member 41 is rotatably connected to the part of the helical tube 10' whose diameter is expanded. a truncated conical stopper 42 and a guide member 43 connected to the opposite side of the control member 41 from the stopper 42 by a connecting vibe 44 and positioned within the spiral tube 10' before diameter expansion. have.

The control member 41 includes a cylindrical main body 41a and a cylindrical main body 41a.
A small-diameter cylindrical support part 41b concentrically extends from the end face of the body part 42 on the side of the strike member 1a, and a hollow tapered guide part extends from the other end of the main body part 41a so as to sequentially reduce in diameter. 41c, and a cylindrical connecting portion 41d that is continuous so as to protrude from the minimum diameter tip of the guide 41c.

A hollow truncated conical locking member 42 is rotatably supported by a bearing on a support portion 41b extending from the main body portion 41a. The locking member 42 has an end portion on the small diameter side.
The support portion 41b of the control member 41 is fitted, and therefore,
The other end on the larger diameter side is located on the side where the diameter of the helical tube lO° is expanded. The outer diameter of the enlarged-diameter end face of the locking member 42 is smaller than the inner diameter of the existing pipe 81 (
, is larger than the outer diameter of the helical tube 10° before diameter expansion, and the outer peripheral edge of the end face is attached to the inner peripheral surface of the tapered part where the wire rod 30 of the helical tube 10° is removed and the diameter is being expanded. It is locked.

A cylindrical core portion 41e is provided at the axial center of the support portion 41b of the control member 41 at an appropriate distance from the support portion 41b. The tip of the core portion 41e is located within the main body portion 41a, and a guide tube 41f is attached to the tip so as to be in line with the core portion 41e. The guide tube 41f has an opening that faces the circumferential surface of the main body portion 41a.

A through hole 41g extending in the axial direction of the main body 41a is formed in the peripheral surface of the main body 41a of the control member 41, and an opening of the guide tube 41f is formed at the end of the through hole 41g on the supporting portion 41b side. The sections are facing each other.

A cylindrical slide portion 41h is provided within the main body portion 41a of the control portion 41. The slide portion 41h is concentric with the main body portion 41a, and therefore, the guide tube 41f is inserted through the axial center portion. A cylindrical portion 41k is provided on the end surface on the support portion 41b side, and is fitted into a gap between a core portion 41e provided in the support portion 41b and the support portion 41b. Slide part 41
h is supported so as to be slidable in the axial direction within the main body portion 41a. Cylindrical portion 41 in the slide portion 41h
The end face on the opposite side from the side on which it is disposed is open.

A through hole 41111 is provided on the circumferential surface of the slide portion 41h.
It is formed to face the opening of the guide tube 41f. The through-hole 41a faces the end of the through-hole 41g of the main body 41a on the stopper 42 side.
The length in the axial direction is shorter than that of the through hole 41g of the main body portion 41a and the through hole 41+o of the slide portion 4th.

and the guide tube 4 through the opening of the guide tube 41f.
1f, and passes through the guide tube 41f. When the strip wire 30 is tilted from the direction perpendicular to the axis in the direction opposite to the side where the stopper 42 is provided, the through hole 41m
The sliding portion 41h is engaged with the peripheral edge of the strip wire 3.
It is pressed at 0 and slides in the tilting direction.

A plurality of tightening portions 41n are disposed within a tapered guide portion 41c that is continuous with the main body portion 41a of the control member 41. Each tightening part 41n has a truncated conical shape similar to that of the guide part 41c, and is divided along a surface extending in the radial direction so that an insertion hole 41p is formed in the axial center part. . Each tightening portion 41n is a guide portion 41c.
The main body part 41 is slidable in the axial direction.
It is pulled into the main body part 41a by each tension spring 41s whose one end is locked to the circumferential surface of the body part 41a. Each tightening part 41n has a guide tube 4 in the insertion hole 41 formed in the part 41n.
A strip wire 30 extending from inside 1f is inserted, and the strip wire 30 inserted through the insertion hole 4ip is inserted into a connecting portion 41d connected to a tapered guide portion 41c.

Each tightening portion 41c is moved against the tensile force of each tension spring 41s by sliding the slide portion 41h located within the main body portion 41a toward the guide portion 41c, and is moved within the guide portion 41c. Pressed against the surrounding surface.

In this state, when each tightening portion 41c is further pressed against the inner peripheral surface of the guide portion 41c, the guide portion 41c
They slide along the inner peripheral surface and approach each other. As a result, the band-shaped wire 30 inserted through the insertion hole 4ip is tightened by the portions 41n, and the movement of the band-shaped wire 30 is stopped and fixed.

One end of a connecting vibrator 44 is rotatably fitted into the distal end of the connecting portion 41d, and a guide member 43 is rotatably attached to the other end of the connecting pipe 44. The guide member 43 has a bullet-shaped end portion opposite to the control member 41 and has an arcuate shape, and a connecting vibrator 44 is inserted through the guide member 43 . and,
The strip wire 30 inserted through the guide portion 41c of the control member 41 passes through the connecting vibe 44 inserted through the guide member 43 and extends from the guide member 43. The band-shaped wire rod 30 is inserted into the spiral pipe 10' and is further inserted into the manhole 82 in which the pipe making machine 20 is installed, as shown in FIG.
It is inserted through the manhole 82 and wound up by a winding device 50 provided near the manhole 82.

The outer diameter of the guide member 43 is the same as that of the spiral tube 1 that has not been expanded.
The inner diameter of the guide member 43 is about 10% smaller than the inner diameter of the guide member 43, and there is no risk that the guide member 43 will tilt inside the helical tube 10'' whose diameter has not been expanded. A control member 41 is rotatably supported between the guide member 43 and the stopper 42, and the control member 41 is designed to prevent the guide member 43 from tilting within 10 degrees of the spiral tube. Because of this, it is in a nearly horizontal state.

The wire rod detachment tool 40 of the present invention has a main body portion 4 of a control member 41.
The lax stopper 42 and the guide member 43 are preferably made of a material that is lightweight and free from corrosion, such as polyethylene or vinyl chloride.

When expanding the diameter of the helical tube 10', the wire rod detachment tool 40 is placed inside the tip of the helical tube 10' in the propulsion direction with the guide member 43 positioned on the pipe making machine 20 side. . Then, the strip wire rod 30 is removed from the distal end portion of the spiral tube 10°, and the through hole 41g of the control member 41 and the through hole 4 of the slide portion 41h in the wire rod removal tool 40 are removed.
1 m in order and insert it into the guide tube 41f. Then, after passing through the connecting pipe 44 from within the guide tube 41f, it is passed through the spiral tube 10° and wound around a predetermined winding device 50.

In this state, the winding device 50 is driven to sequentially wind the strip wire 30 so as to separate from the helical tube 10°, and the pipe making machine 20 is driven to form the helical tube lO°. The belt-shaped body lO is sequentially propelled. As a result, as described above, the engagement portion of the strip 10 forming the helical tube 10° slides from the part where the strip wire 30 is removed, and the diameter of the helical tube 10° is expanded.

When the strip wire 30 is detached from the helical pipe 10° and the strip 10 constituting the helical pipe 10° is propelled, the outer diameter of the helical pipe 10° changes from a sufficiently small state with respect to the sewer pipe 81. , after becoming in the shape of a truncated cone with an enlarged diameter, it is brought into contact with the inner circumferential surface of the sewer pipe 81. At this time, as shown in FIG. 1, the outer diameter of the helical pipe 10' in the unexpanded state is dl, and the outer diameter of the helical pipe 10° expanded to the state where it is in contact with the inner circumferential surface of the sewer pipe 81 is dl. D. If the axial length of the truncated conical portion of the spiral tube 10' whose diameter is gradually expanded is L, the propulsion speed v1 of the strip 10 constituting the spiral tube 10°
If the following relationship is maintained between L and the winding speed v2 of the strip wire 30 separated from the 10° helical tube, L will be constant and the diameter expansion work of the 10° helical tube will be performed stably. .

V2=・vl...(1)-d However, normally, the spiral tube 1 manufactured by the tube making machine 20
0' is not always manufactured to have a predetermined outer diameter d, and the expanded spiral pipe 10' also always has a predetermined outer diameter because the inner diameter of the sewer pipe 81 is not constant. The diameter is not expanded toward the outside diameter. Therefore, the axial length of the 10° truncated conical portion of the helical tube whose diameter is gradually expanded is not constant and constantly fluctuates. When the length of the truncated conical portion of the helical tube 10' becomes shorter, the length of the helical tube 10° becomes shorter.
The propulsive force required for the belt-shaped body to expand the diameter of the tube increases, and the load on the pipe making machine 20 also increases. Furthermore, the spiral tube 10'
When the axial length L of the truncated conical portion becomes short, the tube making machine 20 can no longer make the strip 10 into a spiral tube.

On the other hand, if the axial length of the truncated conical portion of the helical tube 10° tends to increase gradually, the propulsive force of the band 10 required to expand the diameter of the helical tube 10° decreases, and the pipe making machine The load on 20 is also reduced. Even if the axial length L of the truncated conical portion becomes longer, the propulsive force will only slightly decrease, the load on the pipe making machine 20 will not change much, and the diameter expansion work will become slightly unstable. There will be no hindrance to pipe manufacturing work.

For this purpose, the winding speed is set so that the length in the axial direction of the truncated conical portion at 10 degrees of the spiral tube is longer than a predetermined length. (2) The speed is set slightly faster than the appropriate speed, and the strip wire 30 is removed from the helical tube lO°. The wire rod detachment tool 40 of the present invention
The stopper is determined by the ratio of the outer diameter of the 10° helical tube whose diameter has been expanded to a state where it is in close contact with the inner circumferential surface and the axial length of the truncated conical portion whose diameter is gradually expanded at 10° of the helical tube. 42
The control member 41 is connected to the inner circumferential surface of the spiral tube 10'.
The axial length L2 to the opening center of the guide tube 41f through which the wire 30 is inserted, and the helical tube 1 of the stopper 42.
The ratio of the outer diameter D2 of the end face that is locked at 0° is made equal to the ratio.

For this reason, when the length L of the truncated conical portion at 10° of the helical tube becomes shorter, the stopper 4 in the wire rod separation tool 40
With the large-diameter side end surface of 2 being locked to the helical tube 10', by winding up the strip wire 30 by the winding device 50, the diameter of the wire detachment tool 40 is gradually expanded at 10 degrees of the helical tube. It is moved while being in a predetermined position relative to the truncated conical portion. As a result, the spiral tube lO of the strip wire 30
The detachment position relative to ° remains constant for the truncated conical section. If the axial length of the truncated conical portion in the helical tube lO° becomes shorter than the predetermined length L, the wire rod detachment tool 40
It is not moved only by winding up by the winding device 50,
Therefore, the strip wire 30 is not detached from the helical tube 10', but as the strips 10 are sequentially supplied to the helical tube 10', the diameter of the helical tube lO° is sequentially expanded and the helical The axial length of the truncated conical portion at 10° of the tube gradually increases. Then, when the length reaches a predetermined appropriate length L or more, the wire rod detachment tool 40 is moved within the spiral tube lO° by winding up the strip wire 30, and the wire rod detachment tool 40 moves the strip wire 30 is removed from the spiral tube 10'.

On the other hand, if the feeding speed of the strip 10 is
When the rate of separation from the helical tube 10' is faster than that of the helical tube 10', the axial length L of the truncated conical portion at the helical tube 10' becomes longer, and with respect to the detachment position of the strip wire 30 from the helical tube 10', The opening position of the guide tube 41f in the wire rod removal tool 40 is located on the side opposite to the wire winding direction. For this reason, the strip wire 30 is in a tilted state as shown by the two-dot chain line in FIG. When the strip wire 30 is tilted in this way, the slide member 41h in the control member 41
is pressed by the strip wire 30 and moves in the winding direction of the strip wire 30, and each tightening presses the portion 41n in the same direction. Each tightening portion 41n is a guide portion 41c.
A band-shaped wire 30 is brought into contact with the inner circumferential surface, slides along the inner circumferential surface, and is inserted through the insertion hole 41p formed at the portion 41n for each tightening. It will be done. As a result, the movement of the band-shaped wire rod 30 is stopped, and the separation from the spiral tube 10° is stopped. In this state, only the strip lO is in the spiral tube 10°, sequentially.
The spiral tube 10' is fed and the diameter of the spiral tube 10' is expanded. When the diameter of the helical tube 10' is expanded without winding up the strip wire 30, the strip wire 30 is brought into a state along approximately the radial direction of the helical tube lO°, and each tightening is performed by the strip-shaped portion 41n. Wire rod 3
0's movement stoppage is canceled.

In this way, when the strip wire 30 is removed from the helical tube 10°, it is always in a state along the substantially radial direction of the helical tube 10'. There is no risk of damaging or damaging the spiral tube 10' when it is removed. Since there is no possibility that the same length in the narrow direction of the truncated conical portion whose diameter is being expanded in the helical tube 10° becomes shorter than a predetermined length, there is no possibility that the helical tube 10° will become unable to expand its diameter. The diameter is opened smoothly.

In addition, when the wire rod detachment tool of the present invention is used, the tightening is performed by the part 41n, and when the movement of the band-shaped wire rod 3o is stopped,
The strip wire 30 is stopped in a pulled state between the winding device 5o and the tightening section 41n. Therefore,
The strip wire 3o needs to have enough tensile strength to withstand the traction force by the winding device 5o.

Further, the pulling force of the strip wire 30 by the winding device ff150 must be such that the strip wire 3o can be separated from the helical tube 10° and not break the strip wire 30. In the above embodiment, the traction force required to separate the strip wire 3o from the spiral tube 10' is as follows:
7kg-f -10kg-f, and the tensile strength of the strip wire 30 itself is 180kg-f~2
00 kg-f, the traction force of the winding device 50 is 7 kg-f or more, and 180 mounds/1
less than, preferably around look-f.

(Effects of the Invention) The wire rod detachment tool used in the lining method for existing pipes of the present invention can be used after manufacturing a spiral tube with wire rods interposed between each side edge of the strip. Since the wire can be pulled and removed in the substantially radial direction of the helical tube, there is no risk that the helical tube will be damaged or damaged by the wire removed from the helical tube. Moreover, since there is no risk that the helical tube portion from which the wire is removed will be shorter than a predetermined length with respect to the completely expanded portion, the diameter expansion work of the helical tube can be carried out smoothly. Work efficiency will be significantly improved.

4. Simple removal of B Fig. 1 is a partially cutaway side view showing an example of the wire rod removal tool of the present invention, and Figs. 2 and 5 respectively show a lining construction method in which the wire rod removal tool of the present invention is used. A sectional view showing the implementation process,
FIG. 3 is a cross-sectional view of the belt-like body, and FIG. 4 is a cross-sectional view of the main part of the belt-like body whose side edges are locked together.

DESCRIPTION OF SYMBOLS 10... Band-shaped body, lOo... Spiral tube, 12... Substrate, 13... Fitting protrusion, 13b... Insertion part, 13c
...Locking part, 14...Stepped part, 15...Fitting groove, 15a...Locking part, 2o...Pipe making machine, 3o...
- Band-shaped wire rod, 40... Wire rod detachment tool, 41... Control member, 41a... Main body part, 41c... Guide part, 41
f... Guide tube, 41h... Slide part, 41n.
...Tightening is 42s...Tension spring, 42...
- Stopper, 43... Guide member, 5o... Winding device.

that's all

Claims (1)

[Scope of Claims] 1. A helical tube is manufactured by winding a strip in a spiral shape so that adjacent side portions are engaged with each other, and a wire is interposed between the engaging portions. , a spiral pipe used in an existing pipe lining construction method in which the spiral pipe is inserted into the existing pipe and then the wire rod is removed from the spiral pipe to expand the diameter of the spiral pipe and make it almost in contact with the existing pipe. A wire rod detaching tool for detaching a wire rod from a spiral tube, the wire rod being placed in a spiral tube and being detached from the spiral tube is bent so as to be in a state along the axial direction of the spiral tube, As the wire is wound up, it is sequentially moved in the axial direction of the helical tube, and the wire is tilted by a predetermined amount from the radial direction to the axial direction with respect to the helical tube. a control member having a means for regulating movement; and a stopper connected to the control member at a predetermined distance and engaged with a portion of the enlarged spiral tube that has a predetermined inner diameter. A wire rod removal tool comprising: