JPH11122783A - Cable laying method and cable laying conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lay an additional cable in a conduit securely and easily. SOLUTION: A conduit 1 in which a guide part 2 with a face-up guide plane 2c which protrudes downward from the inner wall surface of the pipe body 1a of the conduit 1, and is extended continuously in the longitudinal direction of the pipe body is provided, is used. One end of a cable 6 is connected to the proper position of the bottom of a guide jig 3 which is suspended and supported by the guide plane at a position on one side end in the longitudinal direction of the conduit. After that, by pulling a pulling rope 5a connected to the front end 3c of the guide jig 3, the guide jig 3 is transferred along the guide plane to the other side end in the longitudinal direction of the conduit and the cable is pulled. With this constitution, the cable can be pulled through the conduit automatically and laid in the conduit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitably used particularly when a pipeline is laid underground, and particularly, a cable laying method and a cable suitable for additionally laying a cable in the pipeline. The present invention relates to a laying pipeline.

[0002]

2. Description of the Related Art Conventionally, as a method of laying a cable of this kind, a cable installed in the ground so as to connect two manholes separated from each other by passing a cable through the pipe is used. A cable laying method for laying a cable underground along the above-mentioned conduit is known. In this case, the pipe is formed of, for example, a steel pipe or a lead pipe having an inner diameter of about 400 mm, and a relatively large number of communication cables are passed through the pipe. When the cable is laid from one end position in the longitudinal direction to the other end position in the longitudinal direction of the conduit, first, the cable clamp is inserted into the conduit from the manhole at the other longitudinal end of the conduit to the manhole at the one end side. Pass the quote rope, and then connect one end of the cable tow rope and the end of the cable to be laid at one longitudinal end position of the pipeline, and connect the cable tow rope in the longitudinal direction of the pipeline. Pulling is performed along the pipe from the inside of the manhole on the other end side by using a towing means such as a winch. As a result, the cable is pulled from the one end position to the other end position in the longitudinal direction of the conduit, and the cable is laid in the conduit.

[0003]

However, the above-mentioned conventional cable laying method and pipe line have a disadvantage that the cable or the cable tow rope cannot be laid sufficiently easily. Furthermore, when newly laying another cable in a pipeline in which a cable has already been laid, it is necessary to first pass the cable tow rope into the inside of the pipeline. Since the cable and the already laid cable come into contact with each other, the cable tow rope may be entangled with the already laid cable and may not be reliably carried out. Also, if the cable tow rope is passed through the inside of the pipeline and the cable tow rope and the cable are connected and towed as in the above method, the cable to be additionally laid and the cable already laid are mutually connected. Since the cables may come into contact with each other, the cables to be laid may be entangled with the already laid cables, and the cables may not be laid more reliably.
In addition, since the traction resistance of the cable increases due to the frictional contact between the cables, there is a disadvantage that the work of additionally laying the cable becomes difficult.

In order to solve such inconveniences, for example, as shown in FIG. 12, pipes 7, 7,... 7,
It is conceivable that a cable 6 is passed through each of the additional laying pipes 7 one by one, so that a plurality of cables 6 and 6 can be laid in the pipe 1 ′. . In this case, only one cable 6 is laid for one additional laying pipe 7 and is separated from the other cables 6 by the pipe 7, so that the cables are not entangled with each other, and Also, frictional resistance due to contact between cables does not occur.

However, in the case where the additional laying pipe 7 as described above is used, it is necessary to lay the same number of additional laying pipes as the number of cables to be laid. Is complicated.

The present invention has been made in view of such circumstances, and an object of the present invention is to reliably and easily lay a cable in a pipeline.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a cable is connected to a pipe line arranged between a start point and an end point which are separated from each other. It is assumed that the cable is laid between the start point and the end point by passing the cable through a road. In this method, a guide portion having an upward guide surface that protrudes inward from the upper inner wall surface of the conduit and extends continuously in the longitudinal direction of the conduit is formed as the conduit. Is used. Then, a guide jig was suspended from above by abutting the guide jig against a guide surface at one end side in the longitudinal direction of the pipe, and either one end of a cable or one end of a cable tow rope was connected to the guide jig. Thereafter, the guide jig is moved along the guide surface to a position on the other end side in the longitudinal direction of the conduit to pull either the cable or the cable tow rope.

In the above configuration, when the cable is towed directly by the guide jig, the end of the cable to be laid is connected to the guide jig, and then the guide jig is connected to the guide line along the guide surface. If the cable is moved in the longitudinal direction, the cable is towed along with the movement, and the cable can be reliably laid in the pipeline from the start point to the end point.

In addition, when the additional cable is laid, the tip of the cable to be additionally laid is hung by the guide jig, while the already laid cable is at the lower part in the pipeline. The tip of the cable to be additionally laid and the already laid cable are in a non-contact state. Therefore, these cables do not become entangled with each other, and additional laying can be performed reliably. In addition, it is possible to reduce the contact friction resistance between the cable to be additionally laid and the already laid cable, so that the cable can be towed with a small pulling force, thereby facilitating the work of laying the additional cable. Is achieved.

Further, when the cable tow rope is laid in the pipeline from the start point to the end point, the tip of the cable tow rope to be laid is connected to a guide jig, and then the guide jig is attached to the guide surface. When the cable tow rope is moved along the length of the pipeline, the cable tow rope is towed along with the longitudinal movement of the rope, and the cable tow rope can be easily laid in the pipeline from the start point to the end point.

In addition, even when a cable is already laid in the pipeline, the cable tow rope is connected to the guide jig to connect the cable tow rope with the already laid cable. Is not entangled, it is easy to pass the cable tow rope through the pipeline, and it is possible to easily install additional cables. By using this cable tow rope, the cable can be easily laid from the start point to the end point of the pipeline.

According to a second aspect of the present invention, in the first aspect of the present invention, a guide jig is suspended in advance with respect to a guide surface at one longitudinal end position of the conduit, and the pulling line is connected to one end of the guide jig. Are connected to the guide jig, and the other end is passed through the pipe and is disposed in advance so as to extend to a point on the other end side in the longitudinal direction of the pipe.

In the above configuration, in addition to the operation according to the first aspect of the present invention, the guide jig can be connected to one end in the longitudinal direction of the pipe by pulling the tow line from the other end in the longitudinal direction of the pipe. Move from the side position to the other end position. For this reason, if the cable is connected to the guide jig, the cable is pulled together with the guide jig simply by pulling the pulling rope,
This cable can be automatically passed through the pipeline.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the pipeline is disposed underground so as to connect the underground space from the underground space on the start point side to the underground space on the end point side. It is configured to be installed.

In the above configuration, in addition to the operation according to the first or second aspect of the present invention, even when the pipeline is installed underground, a cable is connected to the underground pipeline. Can be easily and reliably laid, and even when a new cable is additionally laid in a state where the cable is already laid, the additional laying operation can be easily and reliably performed.

According to a fourth aspect of the present invention, in the first aspect of the invention, one end of a cable tow rope is connected to a guide jig, and the guide jig is moved along the guide surface in the longitudinal direction of the pipe. After moving the cable to the other end position and passing the cable tow rope from the longitudinal start point to the end point of the pipeline, the cable is connected to one end of the cable tow rope, and in this state, the cable tow rope is connected to the other end. The cable is towed by pulling the end.

In the case of the above configuration, in addition to the operation according to the first aspect of the present invention, it is possible to obtain a specific configuration of a cable laying method using a cable tow rope. By using the cable, the cable can be easily laid from the start point to the end point of the pipeline.

According to a fifth aspect of the present invention, there is provided an apparatus for carrying out the cable laying method according to the first aspect, wherein the cable is provided so as to connect a start point and an end point which are separated from each other, and the cable passes through the inside. It is assumed that the cable is laid between the start point and the end point. In this apparatus, a pipe disposed so as to connect the two points described above, and a guide portion integrally formed with the pipe so as to protrude toward the inside of the pipe from an upper inner wall surface of the pipe. Shall be provided. Then, an upward guide surface extending continuously in the longitudinal direction of the tubular body is formed on the guide portion.

In the case of the above configuration, when the additional cable is laid, the towing of the cable is guided using the guide surface, so that the additional cable can be reliably and easily laid. For example, if a guide jig suspended from the guide surface and movable in the longitudinal direction of the cable laying pipe is used, after connecting one end of a cable to the guide jig, the guide jig is connected to the guide jig. The cable to be additionally laid can be reliably passed through the cable laying pipeline simply by moving the cable laying pipeline along the surface to the position on the other end in the longitudinal direction of the cable laying pipeline.

According to a sixth aspect of the present invention, in accordance with the fifth aspect of the present invention, the cable hangs in a longitudinal direction of the cable laying pipe along the guide surface while being in contact with the guide surface from above. It is configured to include a guide jig supported by being lowered.

In the above configuration, in addition to the operation according to the fifth aspect of the present invention, after the cable is connected to the guide jig, the guide jig is moved from one end in the longitudinal direction of the cable laying pipe to another position. By moving the cable to the end position, the cable is towed accordingly, and the cable can be laid in a state where the cable is securely passed through the pipeline.

Further, the invention according to claim 7 provides the invention according to claim 6
In the invention described above, one end of the pulling line is connected to the guide jig, and the other end of the pulling line is arranged in advance so as to pass through the cable laying conduit and extend to a point on the other longitudinal end of the conduit. Is what you do.

In the above configuration, in addition to the operation according to the sixth aspect of the present invention, the cable is pulled together with the guide jig simply by pulling the tow line from the underground space at the other longitudinal end of the cable laying pipe. Thus, the cable can be reliably and easily laid from one end position to the other end position in the longitudinal direction of the conduit.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 shows a cable laying pipeline 1 according to a first embodiment of the present invention.
Is disposed underground so as to connect one of two manholes H1 and H2 as an underground space formed at a predetermined distance (for example, 30 to 50 m) apart from each other with one of them as a start point and the other as an end point. I have. The size of the conduit 1 is such that a guide portion and at least two or more communication cables having a considerably small diameter can be accommodated therein, for example, an inner diameter of 400 mm.
Is set to

As shown in FIGS. 2 and 3, the pipe 1 has a pipe 1a having a circular cross section, a guide 2 projecting downward from the upper part of the inner wall surface thereof, And a guide jig 3 disposed in advance in the section 2. If the pipe 1 is formed of a metal pipe such as a steel pipe, the pipe 1a is formed separately from the guide section 2 and the guide section 2 is welded or bolted. The pipe 1a may be fixed to the pipe 1a by fastening means such as a nut and a nut. If the pipe 1 is formed of a synthetic resin, the pipe 1a may be extruded.
And the guide portion 2 may be integrally formed. Further, when the pipe 1 is made of a welded steel pipe, the guide 1 is fixed to a steel plate by welding in advance, so that the pipe 1 having the integrated guide can be manufactured. .

The guide 2 is a hanging piece 2 extending downward.
a and a lower piece 2b projecting from the lower end of the hanging piece 2a to both sides in the horizontal direction are formed so as to have an inverted T-shaped cross section as a whole. On the upper surface on both sides of the lower piece 2b of the guide portion 2, upward guide surfaces 2c, 2c are provided in the longitudinal direction of the conduit 1 (FIGS. 1 and 2).
(A direction perpendicular to the paper surface of FIG. 3). And this guide surface 2
The guide jig 3 is suspended and supported by c and 2c.

The guide jig 3 has a lip groove shape in which lip portions 3b, 3b respectively project from opposite upper ends on both sides of a groove portion 3a having an inner width slightly larger than the lower piece portion 2b of the guide portion 2. Each lip portion 3
Rollers 4, 4,... are attached to the lower surfaces of b, 3b at predetermined intervals in the longitudinal direction of the pipeline 1. The guide jig 3 may be formed, for example, by bending a metal plate, or by resin molding. When the rollers 4, 4,... Abut against the guide surfaces 2c, 2c from above, the guide jig 3 is suspended and supported in the pipeline 1.
The rollers 4, 4,... Roll in the longitudinal direction along the guide surfaces 2c, 2c so that the guide jig 3 is moved and guided in one direction with reduced frictional resistance. . The guide jig 3 is disposed in the pipe 1 near the manhole H1 at one end in the longitudinal direction, and one end of a drawstring 5a is attached to the front end face 3c of the guide jig 3, The other end is provided in advance so as to pass through the pipe 1 and extend to the manhole H2 at the other longitudinal end of the pipe 1.

Next, a cable laying method using the first embodiment will be described with reference to FIG. First, after connecting one end of the cable 6 to an appropriate position on the bottom surface side of the guide jig 3 disposed at one end side in the longitudinal direction of the pipeline 1, the pulling line 5a is connected to the manhole H2 at the other end in the longitudinal direction.
(See FIG. 1) Pull it to the right in FIG. 4 from inside. This allows
The guide jig 3 is moved along the guide surface 2c to a position on the other end side in the longitudinal direction of the pipeline 1, and the cable 6 is simultaneously pulled by the guide jig 3 as a result.
Can be laid in the pipeline 1 along the pipeline 1.

Before the first cable 6 is laid, one end of the drawstring 5a is connected to the front end face 3c of the guide jig 3 disposed at one longitudinal end of the conduit 1. At the same time, one end of another pull cord 5b (see FIG. 4) is connected to the rear end face 3d of the guide jig 3. Then, if the pulling line 5a is pulled rightward in the drawing and the guide jig 3 is towed to the position on the other end side in the longitudinal direction of the pipeline 1, the other pulling line 5b is also pulled to the other end of the pipeline 1 at the same time. It can be arranged so as to pass through this pipe line 1 to the side position. For this reason, it is not necessary to newly arrange the pulling rope 5b for the next installation of the additional cable, and the operation can be greatly simplified.

Further, when the additional cable 6 'is to be laid next, as shown in FIG. By pulling the other pulling rope 5b connected to the end face 3d from inside the manhole H1 (see FIG. 1) at one longitudinal end, the guide jig 3 is moved from the other longitudinal end of the conduit 1 to one end. The cable 6 ′ can be laid by moving the cable 6 ′ to the position in the opposite direction (left direction in FIG. 5) to the method of laying the first cable 6 described above. At this time, one end of the pull cord 5a is connected to the front end face 3c of the guide jig 3.
If the pull cord 5a is connected to the pipe 1, the pull cord 5a can be disposed again so as to pass through the inside of the pipe 1 to a position on one end side of the pipe 1.

When the additional cable is laid, the tip of the cable 6 'to be additionally laid is suspended by the guide jig 3, while the already laid cable 6 is connected to the pipe. Since it is located at the lower part in the road 1, the tip of the cable 6 'to be additionally laid and the already laid cable 6 can be brought into a non-contact state. Thereby, the cables 6 and 6 'do not become entangled with each other, and the additional laying can be reliably performed. In addition, since the contact friction resistance between the cable 6 'to be additionally laid and the cable 6 already laid can be reduced, the cable can be pulled with a correspondingly small traction force, and the cable can be easily formed. Additional laying can be performed.

In addition, when the third and subsequent cables are laid, additional laying is performed using the guide surface 2c and the guide jig 3, so that the guide jig 3 is provided.
Can be towed by minimizing the contact of the additional laying cable connected to the cable with the already laid cable, and the same effect as described above can be obtained.

<Second Embodiment> FIGS. 6 and 7 show a second embodiment of the present invention in which a large-diameter cable 60 having a larger diameter than the normal-diameter cable 6 is additionally laid. Cable tow rope tow 60, 9
Is a twisted metal member for preventing twisting when the large diameter cable 60 is towed. In this case, the large diameter cable 6
0 is connected to the guide jig 3 and is not laid.
To be laid in the pipeline 1.

Since the rest of the structure of the cable laying device is the same as that of the first embodiment, the same members are denoted by the same reference numerals and description thereof will be omitted.

After the normal diameter cable 6 is laid as described above, when the large diameter cable 60 is additionally laid, first, as shown in FIG. After connecting one end of the cable tow rope 8 to an appropriate position on the bottom surface side of the guide jig 3, it extends from one end position in the longitudinal direction of the pipe line 1 to the other end position to extend behind the guide jig 3. By pulling another pull cord 5b connected to the end face 3d from inside the manhole H1 (see FIG. 1) at one end in the longitudinal direction, the guide jig 3 is moved from the position at the other end in the longitudinal direction to the position at one end. A cable tow rope 8 can be passed through the conduit 1. Next, as shown in FIG. 7, the cable tow rope 8 is removed from the guide jig 3, and the cable tow rope 8 is removed.
The metal fitting 9 is attached to one end of the cable, and the cap 10 is attached to one end of the large-diameter cable 60 to be additionally laid. Then, the two cables are connected, and the cable tow rope 8 is pulled from the manhole H2 (see FIG. 1) at the other end, whereby the large-diameter cable 60 is connected to the conduit 1
It can be laid by passing through the inside.

In the additional installation of the large diameter cable 60,
By using the guide surface 2c and the guide jig 3, the cable tow rope 8 can be easily passed through the pipeline 1 from one longitudinal end position to the other longitudinal position of the pipeline 1. Therefore, the work of laying the large diameter cable 60 can be facilitated.

<Other Embodiments> The present invention relates to the first embodiment.
The present invention is not limited to the second embodiment, and includes various other embodiments. That is, when the first cable has a large diameter, first, the cable tow rope 8 is laid using the guide jig 3, and the first cable is laid by the laid cable tow rope 8. If the second additional cable has a normal diameter, the additional cable may be connected to the guide jig 3 and installed.

If both the first cable and the second additional cable have a large diameter, the cable tow rope 8 is laid using the guide jig 3 and the cable is laid. The first cable and the second additional cable may be laid by the cable tow rope 8.

In the first and second embodiments, when a new pipe is provided, the pipe 1 provided with the guide portion 2 may be newly buried in the ground or provided by a propulsion method. As shown in FIG. 8, even in the case where the existing pipeline 1 'is already provided, if the pipeline 1 provided with one guide portion 2 is inserted into the existing pipeline 1'. The additional laying using the guide surface 2c and the guide jig 3 can be performed. Therefore, unlike the related art, it is not necessary to insert the same number of additional laying pipes into the pipeline as the number of cables to be laid, and the work of laying additional cables can be facilitated.

Further, in the first and second embodiments and the other embodiments, the guide portion 2 has an inverted T-shaped cross section, and the guide jig 3 has a lip groove shape. However, the present invention is not limited to this, and the guide portion may have an upwardly directed guide surface, and the guide jig may be one that is suspended and supported by the guide surface. As shown in the above, other shapes may be used.

In FIG. 9, the guide portion 2 has a circular cross-sectional shape, and its upper peripheral surface is formed on the guide surfaces 2c, 2c.
c. The guide jig 3 has a C-shaped cross section with the opening facing upward, and has rollers 4, 4,...

In FIG. 10, the guide section 2 has a lip groove-shaped cross section opening downward, and the upper surface of each lip section is the guide surface 2c. The guide jig 3 has a T-shaped cross section, and rollers 4, 4,... Are attached to the lower surfaces on both sides of the upper piece.

In FIG. 11, the guide portion 2 has an L-shaped cross section, and the bottom surface of the groove formed on the upper surface of the lower piece portion is the guide surface 2c. The guide jig 3 has a U-shaped cross section, and a roller 4 is attached to the lower surface of the upper piece.

In addition, in the above embodiment, the roller 4 is used as the rolling member. However, the present invention is not limited to this. For example, a sphere may be used. Also, the guide surface 2 can be used without using a rolling member.
A sliding layer may be provided on c and the lower surface of the lip 3b of the guide jig 3 to reduce the frictional resistance of the contact surface, such as by applying lubricating oil. Furthermore, it may be made to be able to move by sliding simply by making contact.

[0046]

As described above, according to the cable laying method according to the first aspect of the present invention, when the cable is directly towed by the guide jig, the guide jig connecting the ends of the cables to be laid is used. If the cable is moved in the longitudinal direction of the conduit along the guide surface, the cable is towed along with it, so that the cable can be reliably laid in the longitudinal direction along the conduit.

Further, when the additional cable is laid, the cable to be laid and the already laid cable are not entangled with each other, so that the additional cable can be laid reliably, and furthermore, a small traction force is obtained. , The cable can be towed, and an additional cable laying operation can be easily performed.

Further, even when the cable tow rope is passed through the inside of the pipe from one end position to the other end position in the longitudinal direction of the pipeline, after the tip of the cable tow rope is connected to the guide jig, By moving the guide jig along the guide surface in the longitudinal direction of the conduit, the guide jig can be easily passed through the inside of the conduit and the cable laying operation can be facilitated.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, if the cable is connected to the guide jig located at one end side in the longitudinal direction of the cable laying conduit. The cable is pulled together with the guide jig simply by pulling the tow line from the position on the other end side in the longitudinal direction, and the cable can be passed through the pipeline.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, even if the pipeline is installed underground, the pipeline can be installed underground. The cable can be easily and reliably laid in the pipeline, and even when a new cable is additionally laid in a state where the cable is already laid, the additional laying operation can be easily and reliably performed.

According to the fourth aspect of the invention, in addition to the effect of the first aspect of the invention, it is possible to obtain a specific configuration of a cable laying method using a cable tow rope, By using the quote rope, the cable can be easily laid from the start point to the end point of the pipeline.

According to the fifth aspect of the present invention, the cable laying operation can be facilitated by guiding the towing of the cable by using the guide surface when laying the cable. For example, if a guide jig suspended from the guide surface and movable in the longitudinal direction of the cable laying pipe is used, after connecting one end of the cable to the guide jig, the guide jig is connected to the guide surface. The cable can be automatically passed through the pipeline simply by moving the cable along the other end to a position on the other end in the longitudinal direction of the pipeline.

According to the sixth aspect of the present invention, in addition to the effect of the fifth aspect of the present invention, the guide jig moves from one longitudinal end position to the other end position of the cable laying conduit. As a result, the cable is automatically pulled through the conduit, and the cable can be reliably laid in the longitudinal direction along the conduit.

According to the seventh aspect of the present invention, in addition to the effect of the sixth aspect of the present invention, the cable is provided together with the guide jig simply by pulling the towing line from the other end of the cable laying pipe in the longitudinal direction. By pulling the cable, the cable can be easily laid from one longitudinal end position to the other longitudinal end position of the conduit.

[Brief description of the drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing an embodiment of the present invention.

FIG. 3 is an enlarged sectional explanatory view taken along line AA in FIG. 2;

FIG. 4 is a view corresponding to FIG. 2, showing a cable laying operation state;

FIG. 5 is a view corresponding to FIG. 2, showing a state of additional cable laying work.

FIG. 6 is a view corresponding to FIG. 4, showing a state of laying a cable tow rope.

FIG. 7 is a view corresponding to FIG. 5, showing an additional laying operation state of the cable using the cable tow rope.

FIG. 8 is a diagram corresponding to FIG. 3, in which a drawstring is omitted in another embodiment.

9 is a view corresponding to FIG. 3 in another embodiment different from FIG. 8, in which a part of a tube and a pull cord are omitted.

FIG. 10 is a view corresponding to FIG. 3, in which a part of a tubular body and a pull cord are omitted in another embodiment different from FIGS. 8 and 9;

FIG. 11 is a diagram corresponding to FIG. 3, in which a part of a tube and a pull cord are omitted in another embodiment different from FIGS. 8, 9 and 10;

FIG. 12 is a diagram corresponding to FIG. 3, showing a conduit into which a conventional additional cable laying pipe is inserted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 1a Pipe 2 Guide part 2c Guide surface 3 Guide jig 5a, 5b Towline 6, 6 ', 60 Cable 8 Cable tow rope

Claims (7)

[Claims] 1. A cable for laying a cable between a start point and an end point by passing a cable through the pipe line arranged between a start point and an end point which are separated from each other. In the laying method, the above-mentioned conduit is formed with a guide portion having an upward guide surface projecting inward from the upper inner wall surface of the conduit and extending continuously in the longitudinal direction of the conduit. The guide jig is suspended from the top by abutting the guide jig against the guide surface at one end side in the longitudinal direction of the pipe, and either one end of the cable or one end of the cable tow rope is connected to this guide jig. After that, the guide jig is moved along the guide surface to a position on the other end in the longitudinal direction of the conduit to pull either the cable or the cable tow rope. Cable laying method. 2. The guide jig according to claim 1, wherein the guide jig is suspended in advance with respect to a guide surface at one end side in the longitudinal direction of the pipe, and one end of the pull cord is connected to the guide jig. A cable laying method, characterized in that the cable is laid in advance so that an end is passed through the pipe and extends to a point on the other end side in the longitudinal direction of the pipe. 3. The pipeline according to claim 1, wherein the pipeline is disposed underground so as to connect the underground space from the underground space on the start point side to the underground space on the end point side. How to lay cables. 4. The method according to claim 1, wherein one end of the cable tow rope is connected to the guide jig,
After moving the guide jig along the guide surface to the position on the other end in the longitudinal direction of the pipeline and passing the cable tow rope from the starting point to the end point in the longitudinal direction of the pipeline, one end of the cable tow rope A cable laying method comprising: connecting a cable to the cable; and pulling the other end of the cable tow rope in this state to tow the cable. 5. A cable laying pipe which is disposed so as to connect a start point and an end point which are separated from each other, and which is laid between the start point and the end point by passing a cable inside. And a guide portion formed integrally with the pipe so as to protrude from the upper inner wall surface of the pipe toward the inside of the pipe. An upwardly directed guide surface extending continuously in a longitudinal direction of the tubular body is formed in the guide portion. 6. A guide jig according to claim 5, wherein said guide jig is abutted against said guide surface from above, and is suspended and supported along said guide surface so as to be movable in a longitudinal direction of the cable laying conduit. A cable laying conduit characterized by the above-mentioned. 7. The guide jig according to claim 6, wherein one end of a pulling line is connected to the guide jig, and the other end of the pulling line is passed through a cable laying pipe, and the other end in the longitudinal direction of the pipe. A cable laying pipe line, which is provided in advance so as to extend to a point.