JPH10341509A - Method for extending or removing cable etc., inside duct with ball rollers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to push a cable etc., into a duct or pull it out by securely gripping it with a pair of ball rollers and extend it smoothly even inside a curved cable-extending portion, to mechanize a work of a lifting up a long cable to the ground in the middle portion of the duct and extending it into the next pipe line and to remove the cable, etc., smoothly out of the pipe line. SOLUTION: A pair of ball rollers 4a is provided on the ground beside a buried manhole 3, etc., constructed at one end of a buried duct 2. Gripped and rotated with this pair for the ball rollers 4a, a cable 5, etc., is passed through an installation guiding pipe 8 and corrugated synthetic resin guiding pipe 9 provided up to the inside of the manhole 3, etc., and pushed into the duct 2. The cable 5, etc., is gripped and pulled out of the duct 2 with another pair of ball rollers provided on the ground beside a manhole constructed at the other end of the duct 2. At the pushing side, a lubricant is applied to the outside circumference of the cable 5 etc., and removed at the pulling side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire drawing method in which a communication cable, vinyl pipes, other cables, or the like is inserted from one end to the other end in an underground pipe, and a cable from these pipes. It is related to a construction method for removing classes and the like.

[0002]

2. Description of the Related Art Conventionally, when another cable is inserted into an existing buried conduit in which cables are laid, a rod is conventionally inserted from both ends of the conduit and tangled in the middle. A rope is attached to the back of the cable, and a cable is attached to the end of the rope. Also, as a method of laying an electric wire in a buried conduit, it is common to draw a cable with a rope of a traction tool using an axle winch drum.

[0003] When these are towed using an axle winch drum as in the past, only those that can be wound, such as ropes and wires, can be used, and those that cannot be wound, such as FRP rods and carbon rods. Is not available. Axle winch drums also have room for improvement in that the butt force is essential. Vinyl pipes are often made of polyvinyl chloride, and tend to soften due to temperature rise due to heat generated during high temperatures in summer or during transmission lines in buried conduits where power cables are laid, and stretch and deform when pulled from one side And it is easy to collapse against lateral pressure. Also, when a conventional caterpillar type traction machine is used, too much side pressure is applied and the vinyl cable is crushed. Therefore it is difficult to lay.

[0004] Further, when trying to put vinyl pipes into a buried pipeline in which a power cable is already laid and towed, the pipe penetrates into a gap between the inner wall of the buried pipeline and the power cable, etc., and has a large resistance and is easily laid. Can not. The inside of the manhole and handhole at both ends of the buried pipeline is very narrow, and it is difficult to secure a place to install equipment for pushing and pulling out. When laying or removing the power cable or communication cable, fix the rope to the power cable or communication cable, pull it to a certain length with a winch, fix the rope again to the cables, and use the winch. You have to repeat the work of towing. In this case, since there is a possibility that an abnormal tensile load may be applied to the cables due to the pulling from one side, there is a problem in quality, which is very dangerous in construction.

Therefore, when cables and vinyl pipes are routed to these buried conduits, the cables and the like can be extended without being stretched or damaged. In particular, excessive tension is applied to the cables and the like even when passing through a bent portion of the conduit. A method described in Japanese Patent Application Laid-Open No. 9-46840 has been developed as a method of connecting a cable to a buried conduit or removing the cable from the conduit without damaging the cable or the like.

In this method, a cable or a vinyl pipe is drawn into an underground pipe by burying a compressed gas in a hollow space on the side of a manhole at one end of the buried pipe. The cable and the like are sandwiched between the pair of ball rollers, and the pair of ball rollers is driven to rotate.Then, through the low friction curve pipe provided from the point to the pipe opening in the manhole or the like, into the pipeline. The cable or the like is pushed in, and a pair of ball rollers, which are provided on the ground beside the manhole at the other end of the pipe and filled with a compressed gas in a hollow portion, are driven and rotated to pinch the cable or the like and to rotate the pipe. And a lubricant is supplied to the outer periphery of the cable or the like in front of the pipe port on the pushing side to insert or remove the cable or the like from one end to the other end of the pipe.

[0007]

However, in this method, a lubricant is applied to the outer periphery of the cable or the like in front of the conduit opening on the pushing side, so that the frictional resistance in the conduit is reduced, but the pair on the drawer side is reduced. It is difficult to pinch the cable with the ball roller, and the cable may slide at the location, and the cable or the like may not be pulled out properly. In addition, at the curved part of the manhole in the middle of the pipeline, the guide roller or guide pipe is passed, but the guide roller can support only one side of the cable etc. In this method, the force to push the cable etc. from the rear acts. In addition, there is a possibility that the cable or the like may come off from the guide roller, and in the case of the guide pipe, the cable may be rubbed on the curved inner peripheral surface and the outer periphery of the cable or the like may be damaged, which is insufficient in these respects.

The present invention has been made in view of the above points, and a cable and the like are securely clamped by a pair of ball rollers to push the cable and the like into the conduit and to draw it out from the conduit. Cables can be smoothly extended into pipelines even at curved extensions, and long cables are pulled up to the ground at manholes in the middle of pipelines, and then extended again to the next pipeline. The present invention solves the above-mentioned problems by providing a method for mechanizing a cable and smoothly removing a cable or the like from these pipelines.

[0009]

According to the first aspect of the present invention, there is provided a method for extending or removing a cable or a vinyl pipe from an underground pipe such as a manhole at one end of the buried pipe. A pair of ball rollers having a hollow portion filled with a compressed gas is provided on the ground beside the above, and the cable and the like are sandwiched between the pair of ball rollers, and the pair of ball rollers is driven and rotated. The cable and the like are pushed into the conduit through the introduction guide pipe and the corrugated synthetic resin guide pipe provided up to the inside, and the hollow portion is filled with the compressed gas provided on the ground beside the manhole at the other end of the conduit. By driving and rotating the pair of ball rollers, the cable and the like are pinched and pulled out of the conduit, and a lubricant is applied to the outer periphery of the cable and the like before the conduit opening on the pushing side, and the pull-out is performed. Removing the outer periphery of the lubricant such as cable lubricant removal device provided in front of the ball rollers of the pairs of side
The method of extension or removal of the cable inside the pipeline by a ball roller was adopted.

According to the first aspect of the present invention, since the pair of ball rollers provided at both ends of the pipe are formed by filling a hollow portion with a compressed gas, each of the ball rollers has an indented portion in contact with a cable or the like. Enclose the cable, etc., and hold it. By rotating the pair of ball rollers in this state, a cable or the like can be sent or pulled.
Accordingly, the contact area between each ball roller and the cable or the like is large, and the cable or the like can be sent out without damaging the cable or the like. These cables and the like are pushed into the pair of ball rollers at the entrance of the pipeline, and are pulled by the pair of ball rollers at the exit of the pipeline, and the cables and the like travel in the pipeline. In addition, in this method, since the tip of the cable or the like is meandering at the bent portion of the pipeline while alternately hitting the outer inner peripheral wall and the inner inner peripheral wall, the side pressure is dispersed, and the back tension and the weight of the cable are reduced. There is no effect and the cable side pressure at the bend in the pipeline is almost negligible. In addition, since the outer periphery of the cable or the like is coated with a lubricant in the conduit, buckling of the cables in the conduit is extremely small. Further, when the cable or the like is applied to the pair of ball rollers on the cable drawing side at the outlet of the conduit, the lubricant is removed from the outer periphery of the cable or the like.

According to a second aspect of the present invention, there is provided a method for extending or removing a cable or a vinyl pipe into an underground pipe, the compressed gas is placed on the ground beside a manhole at one end of the pipe. Is provided in the hollow portion, the cable and the like are sandwiched between the pair of ball rollers, and the pair of ball rollers is driven and rotated. The above-mentioned cable or the like is pushed into the conduit through the synthetic resin guide pipe, and a pair of ball rollers having a hollow portion filled with a compressed gas provided on the ground beside a manhole at the other end of the conduit is driven to rotate. Then, the cable and the like are clamped and pulled out of the conduit, and a lubricant is applied to the outer periphery of the cable and the like in front of the conduit opening on the push-in side, and the ball screw of the pair on the draw-out side is The lubricant is removed by a lubricant removing device provided in front of the pipe, the cable and the like are passed through a curved guide pipe in a manhole or the like in the middle of the pipeline, and a plurality of rotations provided on one side of the curved guide pipe are provided. A method of extending or removing a cable or the like in a pipeline by a ball roller passed through a free roller.

According to the second aspect of the present invention, the first aspect is provided.
The same operation as in the invention of the above paragraph, but when the cable or the like must be bent and passed through a manhole or the like in the middle of the pipeline, the cable or the like is passed through the curved guide pipe. Since a plurality of rotation-free rollers are provided on one side of the curved inner surface, cables and the like hit these rollers in the curved guide pipe, and the cables and the like pass while rotating these rollers.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a method for extending a cable or the like according to the present invention and an apparatus used therein. FIGS. 1 to 4 show an outline of the wire drawing method of the present invention, and as shown in FIG.
Buried manhole 3 at one end of cable
A pair of ball rollers 4 on the ground surface 1 near the entrance of
a ball roller device 4 having a
The vehicle 7 equipped with the drums 6 wound around the vehicle is stopped. An introduction guide pipe 8 and a corrugated synthetic resin guide pipe 9 for introducing the cable 5 from the ball roller device 4 to the inside of the buried manhole 3 on the pushing side are provided.

In the middle of the pipe 2, a temporary first manhole 10 shown in FIG. 2 for passing cables and the like in a straight line and a temporary second manhole 11 shown in FIG.
(FIG. 3 shows a plan sectional view of the manhole) and FIG.
As shown in the drawing, the buried manhole 12 on the drawer side is reached. A vehicle 14 having a ball roller device 13 having a pair of ball rollers 13a is stopped on the ground surface 1 near the entrance of the buried manhole 12. In the temporary second manhole 11, a curved guide pipe 15 is fixed to a bracket 16, and a cable or the like is passed through the curved guide pipe 15. In addition to the above, nine steel wheels are continuously connected to one frame. The cable is connected to the 9-kind money wheel 17 provided in the. In addition, in order to guide a cable or the like from the buried manhole 12 of FIG.
A plurality of nine-kin money wheels 17 similar to the above are provided.

FIG. 5 shows the vehicle 7 provided on the ground surface 1 near the entrance of the buried manhole 3 on the pushing side of the cable.
FIG. 2 is a front view of the vehicle 7. The ball carrier 4, the generator 18, the drum mount 19, and the crane 2
Equipped with 0. In the drum mount 19, the drum 6 is mounted on two rollers 21 provided at an interval,
One of the rollers 21 is provided with a rotation drive device 22.
Further, the other end of each holding shaft 23 whose one end is rotatably supported on the bed of the vehicle 7 is fixed to both ends of the shaft 6a of the drum 6, and the other end of each holding shaft 23 is fixed to the bed. The drum 6 is fixed to the other end of the band 24 and is always pressed against the roller 21.

FIGS. 6 and 7 show a front view and a side view of the ball roller device 13 on the cable retracting side. The ball roller device 13 first changes the direction of the cable 5 coming up from the entrance of the manhole 12 in the horizontal direction. Let
An underground guide roller 25 in which a large number of rollers are continuously provided along a curved frame is provided. After the underground guide roller 25, a lubricant removing device 26 and a capstan drum 27 are provided, and the cable 5 is placed on the underground guide roller 25 and inserted through the lubricant removing device 26 to form a pair. And is pinched there, and is pulled by the driving rotation of these ball rollers 13a.

The messenger rope connected to the end of the cable 5 passes through the lubricant removing device 26, is wound around the outer periphery of the capstan drum 27, and is then clamped by a pair of ball rollers 13a, 13a. This reliably pulls the messenger rope in the pipeline by using the pulling force of the capstan drum 27. Therefore, when the cable 5 arrives at the capstan drum 27, the messenger rope is unwound around the capstan drum 27, and the cable 5 is directly connected to the pair of ball rollers 13a, 1a.
3a.

Each of the ball rollers 4a or 13a of the ball roller device 4 or 13 is a conventionally known one and has an airtight outer shell made of an elastic material having a large coefficient of friction, for example, a rubber material, and has a hollow inside thereof. The inside of the unit is filled with a compressed gas such as compressed air, and the axis of each of the shells passes through the center. Then, these two ball rollers 4a or 13a are arranged side by side to face each other, and each shaft 6 and an outer shell integrated therewith are rotated by an appropriate drive source, and these outer shells are dented to make a cable or the like. To be clamped.

Next, as shown in FIGS. 8 and 9, the lubricant removing device 26 is composed of a two-part cylinder 26a.
At one end, a cable inlet guide 28 whose inner diameter is rounded and rounded is provided, and at the other end, a cable outlet guide 29 whose inner circumference is rounded and opened. On the inner periphery of the cylinder 26 near the entrance-side guide 28,
A cleaning nozzle 30 is provided on the upper part and on both left and right sides. Cleaning water is sent to these cleaning nozzles 30 via a hose or the like from a fresh water pump 31 provided in the ball roller device 13 shown in FIG.

A drain port is provided on the bottom surface of the cylindrical body 26a below the washing nozzle 30, and a drain pipe 32 is hung from the drain port. Further, an annular block type air nozzle portion 33 is provided on the inner periphery of the cylindrical body 26a between the washing nozzle 30 and the outlet side guide 29, and the air nozzle portion 33 has an annular concave portion 33a on the outer periphery. A nozzle hole 33b is provided from the annular concave portion 33a to the inner periphery of the air nozzle portion 33. Further, an air insertion hole is provided on the surface of the cylindrical body 26a facing the annular concave portion 33a, and an air supply pipe 34 having one end connected to the air insertion hole is provided.
The other end of the air supply pipe 34 is connected to a ring blower 35 provided in the ball roller device 13 shown in FIG. The above-mentioned two-part cylinder 26a is integrally fixed by fixing knobs 26b provided on the left and right.

The introduction guide pipe 8 is shown in FIGS.
As shown in FIG. 2, it is made of a curved cylindrical body made of ultra-high-molecular-weight polyethylene, is divided into two in the longitudinal direction, and is integrally fixed in a cylindrical shape by a plurality of fixing knobs 36 at appropriate locations.
A support plate 8a for supporting the introduction pipe 8 is provided in the middle of the introduction guide pipe 8. A flexible corrugated synthetic resin pipe portion 8b made of synthetic resin is connected to the lower end of the introduction guide pipe 8,
The corrugated synthetic resin pipe portion 8b and one end of the corrugated synthetic resin guide pipe 9 are connected.
This corrugated synthetic resin guide pipe 9 is shown in FIGS.
As shown in FIG. 4, a plurality of flexible corrugated pipes made of a synthetic resin having a C-shaped cross section are abutted at their adjacent ends, and a two-part annular joint fitting 3 is attached to these portions.
7 and are fixed by fixing knobs 37 a provided on both sides of the joint fitting 37. Therefore, the connection between the end of the corrugated synthetic resin pipe portion 8b at the lower end of the introduction guide pipe 8 and the corrugated synthetic resin guide pipe 9 is also performed by the joint fitting 37.

As shown in FIGS. 15 to 17, the curved guide pipe 15 used in the temporary second manhole 11 is composed of a cylindrical body divided into two parts in the longitudinal direction. The cylinders are integrally fixed at fixed intervals by fixing knobs 15a provided on both sides of the cylinders. Further, at a plurality of curved portions of the curved guide pipe 15, several rotation-free rollers 38 are provided on the curved inner surface.
In this method, a hole is formed in the curved inner peripheral surface of the cylindrical body, a plurality of shafts are provided on rising edges on both sides of the hole, and a roller 38 is supported on each of these shafts. As shown in FIGS. 18 and 19, these curved guide pipes 15 are fixed to a bracket 16 fixed to the inner wall of the temporary second manhole 11 with a U-shaped bracket fixing 16a.

Next, in order to extend the cable 5 using these devices, the cable 5 is pulled out from the drum 6 of the vehicle 7 provided on the ground near the entrance of the buried manhole 3 on the pushing side, and the ball roller device 4 A pair of ball rollers 4a
The cable 5 is fed out of the drum 6 by driving and rotating these ball rollers 4a. Then, the cable 5 is inserted into one end of the introduction guide pipe 8 close to the pair of ball rollers 4a, and further inserted into the embedded manhole 3 through the corrugated synthetic resin guide pipe 9. Then, following the manhole 3, it is inserted into the buried pipeline 2 through a hyume pipe 39 provided to one end of the pipeline 2. At that time, the worker assists the cable 5 to smoothly enter the pipeline 2. A lubricant is applied to the outer periphery of the cable 5 by an appropriate device in the buried manhole 3 or the fume tube 39 before the introduction into the pipe 2.

One end of the messenger rope connected to the end of the cable 5 has already advanced through the pipe 2 and
After passing through the manhole 10, passing through the curved guide pipe 15 of the temporary second manhole 11, and further passing through the 9-year money wheel 17, it reaches the drawer-side buried manhole 12, where 9
The end of the buried manhole 12 is connected to the end of the
The underground guide roller 25, the lubricant removing device 26, and the capstan drum 27 are directed toward the vehicle 14 provided on the nearby ground.
And a pair of ball rollers 13a of the ball roller device 13
The messenger rope is pulled by the driving rotation of these ball rollers 13a. Therefore, the cable 5 connected to the rear end of the messenger rope passes through these members, passes through the curved guide pipe 15 by rotating each roller 38, and reaches the buried manhole 12.

Then, the vehicle goes up to the ground, passes through the underground guide rollers 25, and enters the lubricant removing device 26. Here, first, the cleaning water is sprayed from the three cleaning nozzles 30, and the lubricant attached to the outer periphery of the cable 5 flows down. These washing waters are drained downward through the drain pipe 32. Thereafter, air is blown from the nozzle holes 33b of the air nozzle portion 33 to the outer periphery of the cable 5, and the outer periphery of the cable 5 is dried. And it is pinched by a pair of ball rollers 13a, and it is pulled by the drive rotation of these ball rollers 13a, and takes the figure of eight there.
Then, the buried manhole 12 becomes a push-side manhole, and the cable 5 is further inserted from the buried manhole 12 into the next pipe (not shown). To do this, the figure 5 of the cable 5 is turned over, the end of the cable 5 is gripped by a pair of ball rollers 13a, 13a of the vehicle 7 in FIG. 5, and the ball roller 13a is driven and rotated to connect the cable 5 to the next pipeline. (Not shown) and the same extension is repeated.

FIG. 20 shows a curved guide pipe 15 provided inside an intermediate manhole such as the temporary second manhole 11 in place of the one in which the curved guide pipe 15 of the above embodiment is supported by a bracket 16. An example is shown in which a guide pipe 15 'is used, and the pipe is extended and supported by a flange 15a' provided at the end of the pipe. The configuration of the curved guide pipe with flange 15 'is the same as that of the curved guide pipe 15 except for the configuration of the flange. The flanged curved guide pipe 15 'is connected to the flange 1 as shown by the dotted line in FIG.
Turning and fixing 5a 'has the advantage that the curved guide pipe 15' with flange can be fixed and supported in an appropriate direction.

In this embodiment, this method has been described for a cable. However, the present invention can be applied to an appropriate duct, pipe, or extension of an electric wire. Further, in the above embodiment, the extension of the cable or the like to the pipeline has been described. However, when removing the cable from the pipeline, the cable or the like is pulled at one end of the pipeline, and the cable and the rope connected thereto are pulled at the other end. You can remove it smoothly by pushing in. In addition, we used a 9-car money truck at the curved part of the extension line,
This 9-car is not a requirement. The manhole is not limited to this and can be used in a handhole.

[0028]

According to the first aspect of the present invention, when laying communication cables or vinyl pipes in a pipeline, the cables are pushed in from one end of the pipeline and pulled at the other end of the pipeline. To pass through wires, tension on cables, etc.
In particular, no back tension is applied, so that these cables and the like can be laid without being deformed. In addition, since the outer periphery of the cable or the like is coated with a lubricant in the conduit, buckling in the conduit of the cable or the like is extremely small, the frictional resistance is small, and a smooth wire can be drawn. Further, when the cable or the like is applied to the pair of ball rollers on the cable lead-out side at the outlet of the conduit, the lubricant is removed from the outer periphery of the cable or the like, so that the cable is reliably held and pulled by the ball roller. In addition, when pulling out the cable from the manhole as described above, the work of pulling the long cable once on the ground at the middle manhole of the pipeline, pushing it again into the next pipeline, and extending the wire can be mechanized, such as removing the lubricant. . Further, in this method, the cable and the like can be smoothly removed from the inside of the pipeline by pushing and pulling the both ends of the cable with the ball rollers using the above-described ball roller and other equipment.

[0029] According to the second aspect of the present invention, the first aspect is provided.
In addition to the effects of the above paragraph, when the cable or the like must be bent and passed through a manhole or the like in the middle of the pipe, the cable or the like is passed through the curved guide pipe, but the curved inner surface on one side of the curved guide pipe is Since a plurality of rotation-free rollers are provided, the cables and the like hit these rollers in the curved guide pipe, and the cables and the like pass while rotating these rollers. Therefore, even if a curved portion having a large curvature or a curved portion having a different direction is continuous, the roller is rotated, so that the frictional resistance is extremely small, and a smooth extension or removal can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic front partial cross-sectional view showing a cable pushing side portion in an embodiment of the present invention.

FIG. 2 is a schematic front sectional view showing a temporary first manhole portion in the embodiment of the present invention.

FIG. 3 is a schematic plan sectional view showing a temporary second manhole portion in the embodiment of the present invention.

FIG. 4 is a schematic front sectional view showing a cable draw-out side portion in the embodiment of the present invention.

FIG. 5 is a front view showing the vehicle at a position where the cable is pushed in according to the embodiment of the present invention.

FIG. 6 is a front view showing a ball roller device at a cable draw-out side portion in the embodiment of the present invention.

FIG. 7 is a side view showing a ball roller device at a cable draw-out side portion in the embodiment of the present invention.

FIG. 8 is a front sectional view showing a lubricant removing device at a cable draw-out side portion in the embodiment of the present invention.

FIG. 9 is a side cross-sectional view showing a lubricant removing device at a cable draw-out side portion in the embodiment of the present invention.

FIG. 10 is a front partial cross-sectional view of an introduction guide pipe used on the cable pushing side in the embodiment of the present invention.

FIG. 11 is a side end view of the introduction guide pipe used on the cable pushing side in the embodiment of the present invention.

FIG. 12 is a bottom end view of the introduction guide pipe used on the cable pushing side in the embodiment of the present invention.

FIG. 13 is a front view of a corrugated synthetic resin guide pipe used on the cable pushing side in the embodiment of the present invention.

FIG. 14 is a side view of a corrugated synthetic resin guide pipe used on the cable pushing side in the embodiment of the present invention.

FIG. 15 is a front view of a curved guide pipe used at a curved extension part in the embodiment of the present invention.

FIG. 16 is a cross-sectional view of a roller portion of a curved guide pipe used at a curved extension line in the embodiment of the present invention.

FIG. 17 is a side view of a curved guide pipe used at a curved extension line in the embodiment of the present invention.

FIG. 18 is a front view showing a support state of the curved guide pipe in the embodiment of the present invention.

FIG. 19 is a side view showing a support state of the curved guide pipe in the embodiment of the present invention.

FIG. 20 is a front view showing a support state of a curved guide pipe in another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ground surface 2 Pipeline 3 Buried manhole 4 Ball roller device 4a Ball roller 5 Cable 6 Drum 7 Vehicle 8 Introduction guide pipe 9 Synthetic resin guide pipe with wave 10 Temporary first manhole 11 Temporary second manhole 12 Buried manhole 13 Ball roller device 13a Ball Roller 14 Vehicle 15 Curved Guide Pipe 16 Bracket 17 9 Money Wheel 26 Lubricant Removal Device 27 Capstan Drum 30 Washing Nozzle 38 Roller

Continuation of the front page (72) Inventor Takashi Fujimoto 4-9-25 Shibaura, Minato-ku, Tokyo Inside Tokyo Communication Network Corporation (72) Inventor Isao Ozaki 4- 9-25 Shibaura, Minato-ku, Tokyo Tokyo Communication Network Stock In-house (72) Inventor Daigo Takamura 73, Iwaki-shi, Fukushima Prefecture Onahamakami Hakuji Tateshita 73 Co., Ltd. (72) Inventor Masayuki Otomo 4-83-33 Shibaura, Minato-ku, Tokyo Inside the Kandenko Works (72) Inventor Yuzo Tomita 4-83-33 Shibaura, Minato-ku, Tokyo Kandenko Co., Ltd.

Claims (2)

[Claims] In a method of extending or removing a cable or a vinyl pipe into an underground pipe, a hollow portion is filled with a compressed gas on a ground such as a manhole at one end of the pipe. A pair of ball rollers is provided, the cable and the like are sandwiched between the pair of ball rollers, and the pair of ball rollers is driven to rotate, so that the introduction guide pipe and the corrugated synthetic resin guide pipe provided from the relevant location to the inside of the manhole and the like are provided. The cable or the like is pushed into the pipe through the other end, and a pair of ball rollers filled with a compressed gas in a hollow portion provided on the ground beside a manhole or the like at the other end of the pipe are driven and rotated to drive the cable or the like. Hold it and pull it out of the pipeline,
A lubricant is applied to the outer periphery of the cable or the like in front of the conduit opening on the pushing side, and the lubricant on the outer periphery of the cable or the like is removed by a lubricant removing device provided in front of the pair of ball rollers on the drawer side. The method of extending or removing the inside of a pipeline such as a cable using a ball roller. 2. In a method of extending or removing a cable or a vinyl pipe from an underground conduit such as a cable, a compressed gas is filled in a hollow portion on the ground beside a manhole at one end of the conduit. A pair of ball rollers is provided, the cable and the like are sandwiched between the pair of ball rollers, and the pair of ball rollers is driven to rotate, so that the introduction guide pipe and the corrugated synthetic resin guide pipe provided from the relevant location to the inside of the manhole and the like are provided. The cable or the like is pushed into the pipe through the other end, and a pair of ball rollers filled with a compressed gas in a hollow portion provided on the ground beside a manhole or the like at the other end of the pipe are driven and rotated to drive the cable or the like. Hold it and pull it out of the pipeline,
A lubricant is applied to the outer periphery of the cable or the like in front of the conduit port on the pushing side, and the lubricant is removed by a lubricant removing device provided in front of the pair of ball rollers on the drawer side, and a manhole or the like in the middle of the pipeline. Characterized in that the cable or the like is passed through a curved guide pipe and is passed through a plurality of rotation-free rollers provided on one side of the curved guide pipe. Line or removal method.