JPH01244829A - Engineering method for lining existing tube and wire separator and vibrating tube expander used therefor - Google Patents

Abstract

PURPOSE:To make it possible to line the inner peripheral surface of an existing tube at nearly the same diameter as that of the existing tube by a method wherein a spiral tube to be inserted in the existing tube is set to be smaller in diameter so as to smoothly proceed in the tube and, after that, the inserted tube is expanded diametrally in order to bring it into nearly close contact with the inner peripheral surface of the existing tube. CONSTITUTION:Firstly, the side edge parts, which are adjacent to each other, of a synthetic resin band 10 are engaged with each other by being wound with a tube-making machine 20 and, at the same time, wire 31 is continuously engaged to the band 10, so as to manufacture a spiral tube 10' in order to insert it in order in the existing tube 81, proceed it and fix its tip to the existing tube 81. Under the above-mentioned state, the tube-making machine 20 is put into drive again and the wire 31 of the spiral tube 10' is separated in turn from its fixed side. After that, when the band 10 is fed to the spiral tube 10', the spiral tube 10' is expanded diametrically in turn from the fixed tip side so as to be brought into nearly close contact with the inner peripheral surface of the existing tube. Further, since the wire in the spiral tube can be separated with a wire separator 40, the diametral expansion of the spiral tube is surely done. Furthermore, since the spiral tube is vibrated with a vibrating tube expander 50, the bands adjacent to each other surely slide, resulting carrying out the smooth tube expansion.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a lining method for existing pipes that is carried out when rehabilitating aged existing pipes, a wire rod separation tool used in the lining method, and a vibration control method. Regarding expanders. More specifically, 1. A spiral tube manufactured by spirally winding a synthetic resin band is directly inserted into an existing pipe while being manufactured, and the existing pipe is lined with the inserted spiral tube. The present invention relates to a pipe lining method, a wire detaching tool, and a vibrating diameter expander used in the lining method.

(Conventional technology) For buried pipes used for water supply and sewerage.

Metal pipes and Huyum pipes have been used since ancient times.

Such underground pipes become obsolete after long-term use, and there is a risk of water leakage due to cracking or corrosion. For this reason, recently, synthetic resin pipes are inserted into existing pipes such as aged buried pipes to line them.

One of the methods for lining existing pipes is a method of lining existing pipes with a spiral pipe manufactured by spirally winding a band-shaped body made of synthetic resin. This method is disclosed in, for example, 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 so as to face the end opening of the 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 manufactured spiral tubes are sequentially guided out of the tube making machine while rotating. Then, the spiral pipe led out from the pipe making machine is directly introduced into the existing pipe and is propelled while rotating within the existing pipe. When the spiral tube is inserted over substantially the entire area of the existing pipe, a backfilling material such as cement mortar is filled between the spiral tube and the existing pipe, and the spiral tube is fixed within the existing pipe. As a result, the existing pipe is lined with the spiral pipe.

As the band-shaped body serving as a spiral tube, a flexible synthetic resin such as polyvinyl chloride, polyethylene, polypropylene, etc. is used. The band is usually 5.

A protruding strip is continuously provided in the longitudinal direction on one side edge, and a groove that can be engaged with the protruding strip is continuously provided on the other side edge in the longitudinal direction. When the strip is wound spirally, the protrusions and grooves on the side edges of adjacent strips fit together 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 five times. For this reason, when a helical tube with an outer diameter slightly smaller than the inner diameter of the existing pipe is inserted into an existing pipe, almost the entire outer circumferential surface of the helical tube will come into contact with the inner circumferential surface of the existing pipe, and a large amount of resistance will be applied to the helical tube. There is a risk. The pipe manufacturing machine that manufactures spiral pipes includes:
This is because the strips are sequentially supplied, formed into a spiral tube by the pipe-making machine, and sequentially led out from the pipe-making machine.

When resistance is applied to the helical tube, the helical tube is not propelled through the existing pipe, and the tube-making machine sequentially sends out the strips as a helical tube, causing the mutually fitted protrusions of the strips in the helical tube to The concave groove begins to slide and the diameter of the spiral tube increases. In this way, as the diameter of the helical tube increases, the helical tube cannot be propelled through the existing pipe.

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. It is being promoted. Therefore, in existing pipes lined using the conventional lining method, the part through which fluid flows (the inside of the spiral pipe) is significantly smaller than the original part through which fluid flows (inside the existing pipe), and the fluid flow after lining becomes smaller. The flow rate of the fluid is significantly lower than the flow rate of the fluid before lining.

Furthermore, if the difference in internal diameter between the existing pipe and the helical pipe becomes large, the helical pipe can move within the existing pipe. Must be fixed to the pipe. Filling with such backfilling material may require a large amount of backfilling material, which is extremely time-consuming and impairs economic efficiency.

The present invention solves the above-mentioned conventional problems, and its purpose is to provide a method for lining an existing pipe that can line the inner circumferential surface of the existing pipe to approximately the same diameter as the existing pipe. Yet another object of the present invention.

To provide a method for lining an existing pipe by which the spiral pipe can be easily advanced into the existing pipe when lining the existing pipe with the spiral pipe.

Still another object of the present invention is to provide a wire rod separation tool and a vibrating diameter expander suitable for use in such an existing pipe lining method.

(Means for Solving the Problems) The lining method for existing pipes of the present invention includes the steps of spirally winding a synthetic resin strip whose side edges can engage with each other, and To engage the side edges of adjacent strips and to increase the frictional resistance of the engaged portions.

A process of manufacturing a helical tube by continuously locking a wire rod to a band-shaped body, and sequentially inserting the manufactured helical tube into an existing pipe,
A step of propelling the inserted spiral tube into the existing pipe and then fixing the tip of the spiral tube to the existing pipe, and a state in which the tip of the spiral tube is fixed to the existing pipe.

While separating the wire rod or a part thereof from the belt-like body formed into a spiral tube, the spiral tube is manufactured in the same manner as the step of manufacturing the spiral tube, and the manufactured spiral tube is propelled into the existing tube. the step of expanding the diameter of the helical tube by sliding the side edges of the band-shaped body that are engaged with each other from the portion where the entire wire rod or a part of the wire rod is separated from the band-shaped body, This achieves the above objective.

The wire rod used in the lining method is preferably secured to one side edge of the band-shaped body so as to bring the mutually engaged side edges into close contact with each other.

Also, the wire rod used in this lining method.

Preferably, the wire itself is locked between the side edges of the strip so as to be in close contact with the mutually engaged side edges.

Furthermore, the wire rod used in this lining construction method.

Preferably, a cylindrical part in which air chambers having openings are continuously provided in the axial direction, and a linear plug that is engaged with the cylindrical part to continuously engage the openings of each air chamber. When manufacturing the spiral tube, the wire is connected to the engagement portion of the band-shaped body with each air chamber sealed with the stopper so that each air chamber maintains an expanded state. When the diameter of the helical tube is expanded, the stopper is removed from the cylindrical portion, thereby contracting each air chamber of the cylindrical portion that is latched to the engagement portion of the band-shaped body.

The wire rod detachment tool of the present invention used for detaching the wire from the spiral pipe strip in the lining method includes:
It has a cylindrical main body that is placed in a spiral tube such that one end has a diameter that tapers toward the end surface, and the end surface of the end faces the part from which the wire is to be removed. However, the wire separated from the strip is inserted into the main body from the end surface so as to be pulled in the radial direction of the spiral tube, thereby achieving the above object.

The wire rod detachment tool preferably has a weight that allows it to maintain contact with the helical tube placed thereon when the wire rod is pulled.

The vibrating diameter expander of the present invention, which is used when expanding the diameter of a helical pipe by detaching the wire in the existing pipe lining method, is located within the helical pipe section whose diameter is to be expanded, and is used to expand the diameter of the helical pipe. The above-mentioned object is achieved by including a vibration transmitting part that can be brought into contact with each other, and a vibrator that is supported by the vibration transmitting part and applies vibration to the vibration transmitting part.

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

There are nine examples of the existing pipe lining method of the present invention.

As shown in FIG. 2, this is carried out when rehabilitating an existing concrete sewer pipe 81. In the method of the present invention, first, a synthetic resin strip 10 is made into a spiral pipe 10'' by a pipe making machine 20. The spiral pipes 10' that have been installed and manufactured are sequentially inserted into the sewer pipe 81. At this time, the spiral pipes 10' are...

The outer diameter is set to be sufficiently smaller than the inner diameter of the drain pipe 81 so that at least parts other than the bottom portion do not come into contact with the inner circumferential surface of the drain pipe 81.

The strip 10 used in the method of the present invention has a cross-sectional shape as shown in FIG. The belt-shaped body 10 is.

Polyvinyl chloride, polyethylene, polypropylene.

It is molded from polycarbonate, polyester, or a resin made by reinforcing these resins with glass fiber. The strip-shaped body 10 has a strip-shaped substrate 12 . The substrate 12
An engagement rib 13 protruding from one surface of the substrate 12 is provided continuously in the longitudinal direction on one side edge of the substrate 12 . The distal end portion of the engagement rib 13 has a hollow cylindrical shape, and the hollow portion 13a is also continuous in the longitudinal direction. The base end portion of the engagement rib 13 is divided into two parts by a groove 13b extending in the direction in which the engagement rib 13 projects. The cut groove 13b extends from the hollow part 13a of the engagement rib 13 to the substrate 12.
The cut groove 13b reaches the back surface of the
It is closed by the elastic force of the cylindrical tip itself. On the outer circumferential surface of the cylindrical tip end of the retaining rib 13, elastic band-like bodies 13c and 1 made of, for example, rubber are arranged in pairs in the radial direction.
3c are provided continuously in the longitudinal direction.

The other side edge of the substrate 12 has an engaging portion 14 located on the protruding direction side of the engaging rib 13 by the thickness of the substrate 12. A substantially inverted U-shaped socket 15 protruding in the same direction as the socket 15 is successively provided. The socket eye 5 has a hollow portion i5a that is slightly larger than the tip of the engagement rib 13 inside.

The socket eye 5 is continuous with the substrate 12 by stepping down by the thickness of the substrate 12. On the inner peripheral surface of the socket 15,
A pair of elastic bodies 15c and 15c are located at positions facing each other.
are provided continuously in the longitudinal direction.

Each elastic body 15c has the engaging rib 13 connected to the socket 15.
When the engaging rib 13 is fitted into the hollow portion 15a of the
Each elastic body 13c provided on the outer peripheral surface is opposed to the other elastic body 13c.

A fitting rib 16 is provided on the side of the engaging rib 13 and projects from the substrate 12 in the direction in which the engaging rib 13 projects. The fitting rib 16 has a T-shaped cross section and has an upright portion 16a that protrudes upright by the thickness of the locking portion 14, and a flange portion 16b provided at the tip of the upright portion 16a. . Then, when the engagement rib 13 is fitted into the hollow portion 15a of the socket 15.

The locking portion 14 continuous with the socket 15 is connected to the fitting rib 16.
is fitted between the flange portion 16b and the substrate 12.

Between the fitting rib 16 and the socket 15, there are a plurality of reinforcing ribs 17, 17, which protrude in the same direction as the fitting rib 16. ... are provided at predetermined intervals. Each reinforcing rib 17 has a T-shaped cross section and has an upright portion 17a that projects upright from the substrate 12 and a flange portion 17b provided at the tip of the upright portion 17a. The upright portion 17a of each reinforcing rib 17 is sufficiently longer than the upright portion 16 of the fitting rib 16.

Such a strip 10 is made into a spiral pipe 10" by a pipe making machine 20 installed in the manhole 82. Pipe making machine 2
0 indicates the band-shaped body 10 introduced into the pipe making machine 20.

The band 10 is forcibly bent by a pipe forming roller 21 disposed on the cylindrical circumferential surface with a predetermined helical angle to wind the band 10 in a spiral shape. As shown in FIG. 4, the engagement rib 13 of the strip 10 newly introduced into the pipe making machine 20 is inserted into the hollow part 15a of the socket 15 of the spirally wound strip 10. When fitted, the side edges of the adjacent strips 10 are engaged with each other. At this time, the locking portion 14 continuous to the socket 15 is locked to the flange portion 16b of the fitting rib 16.

In the lining method of the present invention, the pipe making machine 20
Almost at the same time as the engagement rib 13 of the strip 10 newly fed into the pipe making machine 20 is fitted into the socket 15 of the strip 10 spirally wound, the engagement The wire 31 is continuously inserted into the hollow portion 13a at the tip of the rib 13. The wire rod 31 is hard with no elasticity and has an outer diameter slightly larger than the hollow portion 13a of the engagement rib 13. The wire rod 31 is sequentially pushed into the hollow portion 13a from the cut groove 13b of the engagement rib 13.

When the wire rod 31 is inserted into the hollow part 13a of the engagement rib 13, the cylindrical tip of the engagement rib 13 is pushed out,
The outer circumferential surface thereof is brought into close contact with the inner circumferential surface of the hollow portion 15a of the socket 15. Moreover, the cut groove 13b of the engagement rib 13 is in an open state. At this time, the elastic body 13C provided on the inner peripheral surface of the hollow portion 13 of the engagement rib 13 and the hollow portion 15 of the socket 15
The elastic bodies 15c provided on the inner peripheral surface a are also brought into close contact with each other. As a result, the engagement rib 13.

The frictional resistance between the two sockets 15 increases, and the two are integrally engaged without slipping. Therefore.

The helical pipe 10' manufactured by the pipe making machine 20 is propelled through the sewer pipe 81 without expanding its diameter and maintained at a predetermined diameter.

As shown in FIG.
It is fed out from a wire rod drum 32 arranged nearby. The wire rod drum 32 is biased in a direction opposite to the direction in which the wire rod 31 is fed out in order to apply tension to the wire rod 31 being fed out. The wire rod 31 fed out from the wire rod drum 32 is wound around a pair of tension rollers 33 and 34 over a half circumference, and then passed through a wire rod insertion guide 35.
, and is inserted into the hollow portion 13a of the engagement rib 13 in the band-shaped body 10.

The wire rod insertion guide 35 guides the wire rod 31 so that the wire rod 31 forms a predetermined angle with respect to the engagement rib 13 into which the wire rod 31 is inserted.

When the spiral pipe 10' in which the side edges of the adjacent strips are firmly engaged is manufactured in this way, the spiral pipe 10' is directly inserted into the sewer pipe 81 from the pipe making machine 20. inserted into. Then, the spiral pipe 10' is propelled in the axial direction inside the sewer pipe 81 while rotating nine times. At this time, spiral tube 1
Since the outer diameter of 0゛ is sufficiently smaller than the inner diameter of the sewer pipe 81, the spiral pipe 10゛ can be smoothly propelled inside the sewer pipe 81 without almost contacting the inner peripheral surface of the sewer pipe 81 except for its bottom. do. At this time, even if the spiral pipe 10 comes into contact with the inner circumferential surface of the sewer pipe 81, since its diameter is small, the spiral pipe 10''
The resistance received from the inner circumferential surface of the sewer pipe 81 is small, and the spiral pipe 1
0° promotes smooth movement inside the sewer pipe 81. When the tip of the helical pipe 10'' in the direction of propulsion reaches the end of the sewer pipe 81, as shown in FIG. The tip of the pipe 10' is fixed to the end of the sewer pipe 81 by driving, for example, an anchor.

In this state, the pipe making machine 20 is driven again.

The strip 10 is fed to the pipe making machine 20, and the spiral pipe 10' attempts to be propelled through the sewer pipe 81 while rotating again.

At this time, at the same time as the pipe making machine 20 is driven, the wire rod 31 in the engaging rib 13 fitted in the socket 15 of the helical tube 10' is fixed from within the engaging rib 13. Remove them one by one, starting with the first side. Due to this.

The diameter of the hollow part 13a of the engaging rib 13 is reduced by the elastic force of the engaging rib 13, and the engaging rib 13 has a gap with the hollow part 15a of the socket 15, and is engaged with the socket 15. It is in a state where it can slide smoothly on the ribs 13.

Then, by driving the pipe making machine 20, the helical pipe 1 is made into a pipe.
0'', the tip of the spiral pipe 10° reaches the sewer pipe 81, as shown in FIGS. 1 and 6.
Because it is fixed to the socket 1 of the spiral tube 10
5 and the engagement rib 13 slide against each other, and the diameter of the helical tube 10° is gradually expanded from the fixed tip side. The diameter-expanded spiral pipe 10'' is brought into 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 peripheral surface of the sewer pipe 81, the wire 31 is removed from the spiral pipe 10''.
In order to reliably separate the wire rod, the wire rod separation tool 40 of the present invention is used. The wire rod detachment tool 40 has two parts, for example, as shown in FIG. 42. The main body portion 42 has both leg portions 41
and 41, and an introduction part 42b whose base end is connected to one end of the guide part 42a. The introduction portion 42b has a tapered shape whose diameter gradually increases toward the tip. The outer peripheral surface of each leg portion 41 projects outward in a semicircular shape.

Such a wire detachment tool 40 has an appropriate weight and is placed in the helical tube 10' with the introduction part 42b of the main body 42 facing toward the fixed distal end side of the helical tube 10'.

Then, the wire 31 to be separated from the engagement rib 13 of the helical tube 10' is inserted into the guide portion 2a through the introduction portion 42b of the wire rod removal tool 40 and passed through the guide portion 2a. The tube 10' is inserted into the manhole 82 where the tube making machine 20 is installed. The wire 31 is connected to a winding device 38 installed within the manhole 82. Then, the leading edge of the introduction part 42b of the wire rod detachment tool 40 is placed on the helical tube 10'' so that it almost coincides with the radial position of the portion of the helical tube 10' from which the wire rod 31 is to be detached.Such a state. Then, the winding device 32 is driven.As a result, the wire 31 is latched to the leading edge of the introduction section 42h of the wire rod removal tool 40, and then passes through the introduction section 42b and the guide section 42a to the one winding device. 38. Therefore, the wire 31 is pulled from within the engagement rib 13 of the helical tube 10' in the radial direction of the helical tube 10°, that is, toward the center, and is separated from the engagement rib 13.

The winding speed of the wire rod by the winding device 38 is as follows.

It is determined to be approximately equal to the conveyance speed of the strip 1o that is fed to the pipe making machine 20.

The wire rod separation tool 40 is subjected to an upward movement force due to the tension when the wire 31 is wound up by the winding device 38, but due to the weight of the wire rod separation tool 4o itself, the wire rod separation tool 40 is It is not moved upwards.

Spiral tube 10゛ Maintains contact with the inner peripheral surface. Therefore, the wire rod 31 is always pulled from within the engaging rib 13 in the radial direction of the helical tube 10'' (that is, toward the center of the helical tube 10''). Normally, a weight of 10 kg or more is required to prevent the wire rod removal tool 40 from floating up when the wire rod 31 is removed from the spiral tube 10'. Furthermore, since the helical tube 10'' on which the wire rod detachment tool 40 is placed has rotated seven times, the wire rod detachment tool 40 itself also tends to move along the inner circumferential surface of the helical tube as the helical tube 10 rotates. However, in this case, since each leg portion 41 of the wire rod removal tool 40 is rotatably attached to the two cylindrical guide portions 42a, the rotation of the helical tube 10'' itself.

Each leg 41 contacts the inner peripheral surface of the spiral tube 10' while rotating. As a result, the wire rod detachment tool 40 is always used when detaching the wire rod 31 from the spiral tube 10''.

It is located at the bottom of the spiral tube 10''.

When the wire rod 31 is removed from the helical pipe 10° by the wire rod removal tool 40, the spiral pipe 10'' gradually expands in diameter in the direction of propulsion and becomes tapered, and then almost reaches the inner circumferential surface of the sewer pipe 81. In other words, when the wire 31 is removed, the diameter of the hollow portion 13a of the engagement rib 13 is reduced.

There is a gap between the engagement rib 13 and the hollow portion 15a of the socket 15. As a result, both of them started sliding,
The spiral pipe 10'' expands in diameter. The axial length of the tapered portion varies depending on the diameter of the sewer pipe 81, etc.
When the diameter is 500 mm or less, it is preferable that the diameter is usually about 1 m. Then, the cotton material 31 is removed by the wire material separation tool 40.
When removing the pipe, make sure that the length of the 10° taper part of the spiral tube is always about 1 m.

It is preferable to control the winding speed of the wire rod 31 by the winding device 38. This winding speed can be controlled by 1. For example, a television camera is positioned within the enlarged diameter portion of the helical tube 10', and the television camera monitors the position at which the wire rod 31 is detached from the helical tube 10° by the wire detachment tool 40. The configuration is such that That is, the length of the tapered portion is monitored by a television camera, and the withdrawal speed of the wire 31 is adjusted so that the length of the tapered portion is maintained at about 1 m.

The wire rod detachment tool 40 does not need to have a leg portion 41 that rotates in contact with the inner circumferential surface of the spiral tube 10'.

For example, as shown in FIG. 8, the inner circumferential surface of the helical tube 10' is brought into contact with the sled-shaped support 43, and the inner circumferential surface of the helical tube 10'' is slid by rotation of the helical tube 10''. Therefore, it may be configured so that it is always located at the bottom of the spiral tube 10''.

A vibrating diameter expander 50 shown in FIG. 6, for example, is disposed in the tapered portion of the helical tube 10'' so as to reliably increase the diameter of the helical tube 10''.

The vibration expander 50 includes 9, for example, a cylindrical vibration transmitting section 51, and a vibrator 52 disposed within the vibration transmitting section 51.

has. The vibration transmitting portion 51 has a tapered portion 51a whose diameter gradually decreases as one end becomes closer to the end surface, and a cylindrical portion 51b having a constant diameter excluding the tapered portion 51a. The outer diameter of the cylindrical portion 51b is approximately 5 mm smaller than the inner diameter when the spiral tube 10' is expanded. The cylindrical part 5
A support stand 53 is installed horizontally in 1b, and a vibrator 52 is mounted on the horizontal stand 53. A pair of reinforcing rods 54 and 55 arranged in a cross shape are installed in the tapered portion 1a of the vibration transmitting portion 51 so as to face the end surface of the tapered portion 51a.

The vibration expander 50 includes a tapered portion 51a of the vibration transmitting portion 51.
is used by being fitted into the tapered part of a 10" helical rod. Then, when the wire rod 31 is removed from the spiral tube 10° by the wire rod removal tool 40, the vibrator 52 is driven.

The vibration of the vibrator 52 is transmitted to the tapered portion of the helical tube 10° via the vibration transmitting portion 51 in contact with the helical tube 10', and the helical tube 10° is vibrated. As a result, the wire 31
The socket 15 of the strip 10 and the engagement rib 13 of the helical tube 10'' from which it has been removed smoothly slide, and the diameter of the helical tube 10'' is easily expanded.

The vibrating diameter expander 50 is pulled from the outside of the helical tube 10'', for example, in the same direction as the wire rod separation tool 40,
And at approximately the same speed as the wire rod detachment tool 40.

Move inside the spiral tube 10゛.

FIGS. 9(a) and 9(b) show another embodiment of the vibrating diameter expander. In the vibration expander 50', a vibrator 52 is placed on a vibration transmission section 56. The vibration transmission section 56 is.

A pair of connecting plates 56 located in the axial direction of the spiral tube 10
A horizontal support plate 56b is attached to a and 56a. The bottom surface of each connecting plate 56a has a semicircular arc shape along the inner circumferential surface of the spiral pipe lO'', and between each connecting plate 56a there are, for example, six sleds 56c, 56c, etc. in the circumferential direction. Installed with equal spacing.

A pair of support rods 57a and 57a are erected on the upper surface of the end of the support plate 56b in the direction of movement of the vibrating diameter expander 50. A rotating rod 5 is provided between the upper ends of each support rod 57a.
7b is rotatably supported. Each end of the rotating rod 57b extends from the upper end of each support rod 57a toward the traveling direction and the opposite side of the vibrating diameter expander 50'', and the end on the traveling direction side extends from the upper end of each supporting rod 57a. A tension spring 57C is interposed between the rotation rod 57b and the support plate 56b.A guide roller 57d is rotatably supported at the other end of the rotation rod 57b.

The vibrating diameter expander 57 having such a configuration is connected to the helical rod 10''.
Each sled 56c is positioned in the tapered portion of the helical tube 10'' in the axial direction of the helical tube 10''.The guide roller 57d supported at the tip of the one-turn rod 57b is connected to the tension spring 57.
By rotating the rotating rod 57b at c, the spiral tube 1
0'' is brought into contact with the upper inner circumferential surface.

In this state, the vibrator 52 is driven and the helical tube 10
The helical tube 10'' is vibrated through the vibration transmitting portion 56 that has come into contact with the vibration transmitter 56. At this time, the guide roller 57d is constantly rotated in the helical direction because the vibration caused by the vibrator 52 is absorbed by the rotating rod 57b. The vibrating diameter expander 50'' is in contact with the inner circumferential surface of the tube 10''.Similar to the vibrating diameter expander 50, the vibrating diameter expander 50'' is moved in the same direction as the wire rod removal tool 40. During this movement, the guide roller 57d rolls into contact with the upper inner circumferential surface of the spiral tube 10°.

The vibrating diameter expander 50' of this embodiment can be inserted into a sewer pipe 81 with a different inner diameter because the guide roller 57d that contacts the upper inner peripheral surface of the spiral pipe 10' can change its position by the tension spring 57c. The vibrating diameter expander 50' can also be used when expanding the diameter of the helical tube 10'.

The belt-shaped body used in the lining method of the present invention is as follows.

For example, as shown in FIG. 10, the engagement rib 13 may be solid so that the side edge of the main body 12 near the engagement rib 13 and the other side edge can be engaged.

The hard wire 31 may be locked between the edge of the main body 12 near the engagement rib 13 and the other side edge.

Alternatively, as shown in FIG. 11, an engagement rib 13' may be provided on one edge of the main body part 12 to protrude upright from the main body part 12. The tip of this engaging rib 13' has a solid circular cross section. The other side edge of the strip 11 is provided with a substrate 12, similar to the strip of the embodiment described above.
An engaging portion 14° positioned in the protruding direction of the engaging rib 13'' by a thickness of , and a socket 15'' connected to the engaging portion 14'' are provided. The tip of the socket 15' is a hollow portion into which the tip of the engagement rib 13' can be loosely fitted. The other configurations are the same as those of the band-shaped body 10 described above.

When the side edges of such strip-like bodies 11 are engaged with each other, a wire rod 61 having an elasticity of 1, for example, 1 is used to increase the frictional resistance of the engaged portion. The wire rod 61
1 For example, round rubber with sufficiently high tensile strength is used,
It is locked in the gap between the proximal end of the engagement rib 13' of the strip 11 and the proximal end of the socket 15'' into which the engagement rib 13' is fitted.

In this case, nine positioning recesses 12a may be continuously formed at the base end of the socket 15'' where the wire 61 is locked.Gap between the socket eye 5' and the engagement rib 13' The wire rod 61 that is locked inside is the wire rod 61 itself.

It is strongly pressed against the socket 15'' and the engaging rib 13'' and functions as a frictional resistor between the two. As a result, the socket 15' and the engaging rib 13' are firmly engaged.

The wire 61 is not limited to the one having elasticity as described above, but may be a wire.

Furthermore, as shown in FIG. 12, a thin plate-like wire rod 62 having 9 elasticity may be used. In this case, at the proximal end of the socket 15° and the proximal end of the engaging rib 13′.

A recessed hole for positioning is not required. In order to smoothly detach such a thin plate-shaped wire 62, it is particularly effective to use the wire detaching tool 40 of the present invention described above.

Furthermore, as shown in FIGS. 13(a) and 13(g), a wire rod 63 in which nail-shaped locking bodies 63b are arranged at predetermined intervals on a belt-shaped connecting band 63a may also be used. The wire rod 63 is.

When winding the strip 11 to form a spiral tube 10'.

Each locking body 63b is sequentially inserted into the gap between the base end of the socket 15' and the base end of the engagement rib 13'. At this time, the connecting band 63a is brought into close contact with the inner peripheral surface of the manufactured spiral tube 10'. When expanding the diameter of the helical tube 10°, the connecting band 63a is pulled in the radial direction of the helical tube 10'', so that each locking body 63b is connected to the socket 15° and the engagement rib 1.
It is separated from the gap between 3゛.

Furthermore, the wire rod 64 shown in FIG.
may also be used. The wire 64 has a hollow cylindrical portion 64a having two elasticities, and a linear plug 64b made of a hard material and having a circular cross section. Air chambers 64d are formed continuously in the axial direction within the cylindrical portion 64a, and each air chamber 6
4d each has an opening 64c.

The plug 64b is locked to the cylindrical portion 64a to airtightly seal the opening 64c of each air chamber 64d.

The wire rod 64 is connected to the base end of the socket 15' and the engaging rib 1.
It is fitted into the gap between the base end and the base end of 3. socket 15
Recessed holes for one positioning are provided at mutually opposing positions of the proximal end and the 13° proximal end of the engagement rib.

The wire rod 64 is inserted into the socket 15 into which the strip 11 is fitted when the helical tube 10' is manufactured by winding the strip 11.
The engagement rib 13' is fitted into the gap between the engagement rib 13' and the engagement rib 13'. At this time, the wire 64 is connected to each air chamber 64d of the cylindrical portion 64a.
A stopper 64b is continuously engaged with the cylindrical portion 64a in a state where each air chamber is filled with air, and the stopper 64b hermetically seals each air chamber 64d. Therefore.

The wire rod 64 is in an expanded state, and in this expanded state, the wire rod 64 is inserted into the gap between the socket 15'' and the engagement rib 13''. The wire rod 64 inserted into the socket 15' and the engagement rib 13'' is pressed against the base end of the socket 15' and the base end of the engagement rib 13'' and functions as a frictional resistor between the two.As a result, The socket 15' and the engaging rib 13' of the spiral tube 10' to be manufactured are firmly engaged.

When expanding the diameter of the spiral tube 10'', the stopper 64b of the wire 64 is sequentially pulled out from the cylindrical portion 64a. As a result, each air chamber 64d in the cylindrical portion 64a is opened, and the bottom portion 64c is sequentially opened, and the cylindrical portion 64a is connected to the socket 15.
The air in each air chamber 64d is exhausted by being pressed by the engaging rib 13''.
The elastic cylindrical portion 64a is sequentially contracted, and the engaged socket 15' and engagement rib 13' are in a state where they can smoothly slide against each other, and the diameter of the helical tube 10° is expanded.

(Effects of the Invention) As described above, the existing pipe lining method of the present invention allows the spiral pipe inserted into the existing pipe to have a small diameter, so that it can be smoothly propelled through the existing pipe. The spiral tube inserted into the existing pipe can be easily expanded in diameter and brought into close contact with the inner circumferential surface of the existing pipe. the result,
The outer diameter of the helical tube serving as the lining tube can be made approximately equal to the inner diameter of the existing tube, and the fluid flow rate inside the helical tube can be made approximately equal to the flow rate before lining. When manufacturing a helical tube, a wire rod is locked to a band-like body, and adjacent band-like bodies are engaged without sliding, so that a small-diameter helical tube can be reliably manufactured. Because the wire material physically deforms the strip and suppresses its sliding,
Even if the spiral pipe gets wet, such as inside a sewage pipe or during rainy weather,
Manufacture of spiral tubes can be carried out without any problems.

9. The wire inside the spiral tube is removed using the wire rod detachment tool of the present invention.

Because it can be reliably removed from the spiral tube.

The diameter of the spiral tube can be expanded reliably.

Furthermore, the spiral tube can be made using the vibrating diameter expander of the present invention.

Since the portion to be expanded in diameter is vibrated, adjacent strips reliably slide against each other, allowing smooth expansion in diameter.

4. Figures 1 and 2 are cross-sectional views showing the implementation steps of the lining method of the present invention, Figure 3 is a cross-sectional view of the strip, and Figure 4 is a cross-sectional view of the strip where the side edges are connected to each other. 5 is a front view showing the manufacturing state of the spiral tube, FIG. 6 is an enlarged view of the main part of FIG. 1, and FIG. 7 is a side view showing an example of the wire rod separation tool. Figure 8 is a side view showing another example of the wire rod removal tool, and Figure 9 (
a) is a front view showing another example of the vibrating diameter expander; FIG. 9(b)
is its vertical sectional view, Figures 1O to 12 and 13 (
a) is a cross-sectional view showing another example of a strip and a wire rod, FIG. 13(b) is an enlarged view of the main part of the wire rod shown in FIG. 13(a), and FIG. 14(a) is another example. FIG. 2 is a cross-sectional view of a band-shaped body using the example wire rod.

FIG. 14(b) is an enlarged longitudinal sectional view of the wire.

DESCRIPTION OF SYMBOLS 10... Band-shaped body, 10゛... Spiral tube, 20... Pipe making machine, 31゜61-64... Wire rod, 40... Wire rod detachment tool, 50... Vibrating diameter expander.

64a... Cylindrical part, 64b... Stopper.

that's all

Claims (1)

[Claims] 1. A step of spirally winding a synthetic resin band whose side edges can engage with each other; and a step of spirally winding the side edges of the band that are adjacent to each other as a result of the winding. In order to engage each other and increase the frictional resistance of the engaged part, a wire rod is continuously locked to that part,
a step of manufacturing a helical tube, a step of sequentially inserting the manufactured helical tubes into an existing pipe, propelling the inserted helical tube into the existing pipe, and then fixing the tip of the helical tube to the existing pipe;
Manufacturing a helical tube in the same manner as the step of manufacturing the helical tube, with the tip of the helical tube being fixed to the existing tube, and removing the whole or a part of the wire from the band-like body formed into the helical tube. By propelling the helical tube into the existing pipe, the side edges of the strip where the entire or part of the wire of the helical tube is separated from the strip are slid together, and the side edges of the strip are mutually engaged. A method for lining an existing pipe, comprising: expanding the diameter of the spiral pipe. 2. The method for lining an existing pipe according to claim 1, wherein the wire rod is locked to one side edge of the band-shaped body so as to bring the mutually engaged side edges into close contact with each other. 3. The existing pipe according to claim 1, wherein the wire rod is locked between each side edge portion of the strip body so that the wire rod itself is in close contact with each mutually engaged side edge portion of the strip body. Lining method. 4. The wire rod includes a cylindrical part in which air chambers having openings are continuously provided in the axial direction, and a wire that is engaged with the cylindrical part to continuously engage the openings of each air chamber. When manufacturing the spiral tube, the wire rod is engaged with the band-shaped body while each air chamber is sealed with the plug so that each air chamber maintains an expanded state. The stopper is continuously engaged with the cylindrical part, and when the diameter of the spiral tube is expanded, the stopper is removed from the cylindrical part, thereby contracting each air chamber of the cylindrical part that is engaged with the engaging part of the band-shaped body. The lining method described in Section 3. 5. In the existing pipe lining method described in claim 1,
A wire rod detachment tool used for detaching the entire wire or a part of the wire from the belt-shaped body formed into a spiral tube, the diameter of which increases in a tapered shape as one end becomes closer to the end face side. It has a cylindrical main body that is placed in the spiral tube so that the end surface of the end faces the part from which the entire wire or a part of the wire is to be removed, and the wire or the part thereof that is removed from the strip body is A wire removal tool inserted into the main body from the end surface so as to be pulled in the radial direction of the helical tube. 6. The wire rod removal tool according to claim 5, wherein the wire rod removal tool has a weight that allows the wire rod removal tool to maintain contact with the inner peripheral surface of the helical tube on which it is placed when the wire rod or a portion thereof is pulled. 7. In the existing pipe lining method described in claim 1,
A vibration expander used when a wire or a part thereof is detached to expand the diameter of a helical tube, the vibrating expander being positioned within the helical tube section to be expanded and capable of contacting the helical tube section. and a vibrator that is supported by the vibration transmission section and applies vibration to the vibration transmission section.