JP2002010421A - Method for continuity and cable-laying inside connection pipe line of sewerage, and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide methods for sure and smooth connection which is unmanned and subsequent cable-laying inside connection pipe line of sewerage, and to provide a device used for these methods. SOLUTION: A pipe body 12, passing through a body 11 of the device is provided movably to and fro inside a pipe line 14 or 15. A part of the tip of the pipe body 12, jutting from the front of the main body 11, is expanded into a trumpet-shape. The angle of the trumpet-shaped curved surface is set larger than that of a bending allowable radius of a cable 13 to be laid. The pipe body 12, having the trumpet-shaped tip 12a, is set freely rotatably on the central axis. While a rope, passing through the pipe lines 14 and 15, runs through the pipe body 12, the body 11 is moved in the pipe line 14 or 15 and reached connection part. Then, by towing the cable 13 connected directly or indirectly from the trumpet-shaped tip 12a to the end of the rope, the cable 13 is laid in the other pipe line 14 or 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for conducting a cable such as an optical fiber cable and the like in a branch connection of an existing sewerage line, and a method and a device for laying a cable.

[0002]

2. Description of the Related Art With the development of information communication, there is a plan to establish an information communication network all over Japan, and plans using existing sewers are in progress. Sewers are installed all over Japan, and the sewer pipes do not always overflow and flow in the sewer pipes. The part is an unused space. Therefore, optical fiber cables are laid on the upper part of such sewers.

[0003]

When a cable is laid in a branch connection of a pipe of the sewer, there is conduction that is performed using a conduction rope as a preceding step. However, the diameter of such a conduit at the branch connection point is often small so that no one can enter. Therefore, there is a method using air as the conduction method. In this method, these pipes are filled with air and the rope is passed through with the pressure of the air.In this method, all the pipes except for the purpose of conduction must be sealed, which requires a lot of time and labor. Take it. In addition, there are several methods and apparatuses for laying the cable after the above-described conduction in such a branch connection portion.
At the same time, the method cannot be performed smoothly, and there is no suitable method as a conduction method, a cable laying method, and a device therefor.

Accordingly, the present invention solves the above-mentioned problems by providing an unmanned, reliable, and smooth continuity and subsequent cable laying method in a connecting pipe section of a sewer, and a device used in these methods. is there.

[0005]

According to a first aspect of the present invention, one end of a rope is connected from a line upstream of the sewer to a line downstream thereof in a connection line of two sewers. The derivative is made to flow by using the water flow of the above-mentioned sewer to conduct,
After that, the cable connected directly or indirectly to the other end of the rope is pulled and laid to establish a method of continuity and cable laying in the connection pipe section of the sewer.

According to a second aspect of the present invention, in a connection pipe section of two sewers, a pipe body of a fixed length penetrating back and forth is provided in an apparatus main body which is provided so as to be movable back and forth in the pipe. At least a part of the distal end of the tubular body protruding from the front surface of the main body is formed in a flared shape, and the angle of the flared curved surface is set to an angle equal to or larger than a bending allowable radius of a cable to be laid. A pipe having a distal end portion is provided rotatably about the central axis of the pipe, a rope that has passed through the pipe is inserted through the pipe of the apparatus main body, and the apparatus main body is passed through the pipe. After proceeding to reach the connection point, the cable connected directly or indirectly to the end of the rope from the trumpet-shaped tip of the device body is pulled out and laid out in the other conduit. In the connecting pipe section of the sewer Was Buru laying method.

According to a third aspect of the present invention, the apparatus main body is provided so as to be movable back and forth in the pipeline, a pipe of a fixed length penetrating the interior of the apparatus body back and forth is provided, and protrudes from the front surface of the apparatus body. At least a part of the distal end of the tubular body is formed in a flared shape, and the angle of the curved surface of the tubular shape is set to an angle equal to or larger than the allowable bending radius of the cable to be laid, and the tubular body having the tubular end portion is provided. Is provided so as to be rotatable about the central axis of the pipe body, a rope connected through the pipe is inserted into the pipe body of the apparatus main body, and a cable directly or indirectly connected to an end of the rope is connected to the cable. The cable laying device in the connection pipe section of the sewage was configured to be passed through the pipe and led out from the trumpet-shaped tip.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A conduction method using a water flow according to a first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the shape of the conductor 1 for conducting the rope 3 is a bag shape for receiving flowing water, and the material may be metal, cloth, plastic, or the like, and the string 2 is attached from two places at the opening edge of the conductor 1. And is connected to one end of the rope 3.

Using the derivative 1, the rope 3 is conducted to a portion where the branch line 5 is connected to the main line 4. At this time, if the inner diameter of the main line 4 is 1.0 m or more, a person can enter the conduit and work for conduction can be performed. Shall be. Usually, installed sewers are connected with a downward slope so that water flows from upstream to downstream. For example, when connecting from a branch line 5 extended from a general home or a building to a larger main line line 4, the branch line 5 is usually connected to the main line 4 so that sewage flows therethrough. It is upstream.

Therefore, the derivative 1 is placed in the sewage water flow from the upstream opening on the side not connected to the main line 4 in the branch line 5. Then, the derivative 1 first flows toward the downstream main line 4 while storing the water flow in its own bag-shaped portion, and the derivative 1 also flows in the main line 4 in FIGS. 2 and 3.
As shown in the figure, the derivative 1
Flows further downstream, and conducts in the branch pipeline 5 and the main pipeline 4. At this time, if it is desired to conduct the rope 3 on the side opposite to the direction in which the water flows, pull the rope 3 in the desired direction from that direction as shown in FIG. You can also.

Next, a cable laying method and a cable laying apparatus according to a second embodiment of the present invention will be described with reference to FIGS. The device body 11 of this cable laying device
Is provided in a substantially box shape at a position of a central axis connecting the front and rear sides thereof and penetrating a tube body 12 of a fixed length. A distal end portion 12a of the tubular body 12 protruding from the front surface of the apparatus main body 11 is provided in an expanded manner in a half trumpet shape, and the tubular body 12 having the semi-wrapped distal end portion 12a rotates about the central axis. The tip part 1 is provided freely by the tension applied to the rope inserted inside.
The half trumpet portion 2a is rotated in the direction in which the tension is applied, so that the rope always extends outside the tube through the curved surface of the half trumpet portion.

The angle of the curved surface of the half trumpet is equal to or larger than the allowable bending radius of the cable 13 to be laid. This is because the allowable radius of bending when laying is determined by the cable to be laid, and if tension is applied below this allowable radius or if the cable is bent by bending below the allowable radius, the cable will be structurally damaged and defective. Therefore, the bending radius of the cable to be laid is maintained to be equal to or larger than the allowable radius.

Further, on the upper surface and the lower surface of the apparatus main body 11, two telescopic fixed projections 16 are provided. Each of the fixed projections 16 is movable by electric, pneumatic, hydraulic or hydraulic pressure. . A television camera 17 is provided on the upper part of the front surface of the apparatus main body 11, and four rollers 18 are provided on four sides of the lower part of the apparatus main body 11.
The cable main body 11 is provided so as to be movable in the front-rear direction, and an operation rod 19 for extruding and removing the cable laying device is attached to a rear portion of the main body 11.

Behind the current position of the cable laying device (right side in FIGS. 5 and 6), the operation rod 1
There is a place to push and pull 9. The monitor of the TV camera 17 is also installed here, and the operation of moving the cable laying device and the operation of expanding and contracting the fixed projection 16 are performed while watching the monitor.

Next, using this cable laying device,
The cable 1 is installed in a right-angled connection part connecting the branch line 14 from the horizontal direction to the main line line 15 installed in the vertical direction shown in FIG.
3 will be described. The cable already laid in the right-angled pipe is inserted into the pipe 12 of the cable laying apparatus, and the cable laying apparatus is opened from the opening of the branch pipe 14 which is not connected to the main line 15. The operation stick 19 is pushed out and advanced while watching the monitor of the television camera 17 through the apparatus main body 11. Then, the device main body 11 of the cable laying device reaches the right-angled connection portion, and the semi-flapper-shaped tip portion 12a is inserted in the right-angled connection portion into the main line conduit 15.
It is confirmed by the monitor of the television camera 17 that the cable laying device is protruding to the side, and the progress of the cable laying device is stopped. At this time, the tip 12a of the tube 12 of the device main body 11 having a semi trumpet shape is
The rope faces downward due to the tension of the rope passing therethrough. Thereafter, the fixing projection 16 is extended upward and downward to be pressed against the side wall in the branch conduit 14, and the cable laying device is fixed at this position.

The rope and the pulling rope are pulled from the side of the pipe line through which the rope is conducted, and the cable 13 is led out from the semi-flapper-shaped tip portion 12a of the pipe 12 of the apparatus body 11, and pulled and laid. . At this time, since the angle of the curved surface of the semi trumpet-shaped tip portion 12a of the tubular body 12 is equal to or larger than the allowable bending radius of the cable 13, the cable 13 is not damaged, the performance is not impaired, and the towing can be reliably performed. After this,
The cable 13 that has been bent and pulled is fixed to the position by an appropriate method.

In the above-described first embodiment, the derivative 1 is formed in a bag shape. However, if the derivative 1 is flown without stagnation, the shape of the derivative 1 is such that it floats in water such as a ship bottom type or a floating ring. Alternatively, a roller 1a or the like may be provided below the derivative 1 as shown in FIG. Further, in the second embodiment, the distal end portion 12a of the tube body 12 is formed as a half trumpet-shaped expanded curved surface, but the expanded curved surface has a 360-degree omnidirectional flared shape and is rotatable in all directions. It may be provided. Further, the roller 18 is provided on the lower surface of the apparatus main body 11 of the cable laying apparatus so that the apparatus main body 11 can be moved back and forth. However, the configuration that allows the apparatus main body 11 to be able to move back and forth is not limited to this.

[0018]

According to the conduction method of the first aspect of the present invention,
From the upstream pipe of the sewer to the downstream pipe, the derivative with one end of the rope is flowing and conducting,
Unmanned, smooth and reliable conduction can be achieved. Also, when the flow of sewage is small, if you replenish the water appropriately and allow it to flow,
Derivatives move reliably in this stream.

According to each of the second and third aspects of the present invention, at least a part of the distal end of the tube provided in the apparatus main body is formed by expanding in a trumpet shape or a half trumpet shape. The angle of the curved surface is provided at an angle equal to or greater than the allowable bending radius of the conducting cable, the above-mentioned pipe is provided rotatably, the rope conducted through the pipe is inserted through the inside of the apparatus main body, and the trumpet-like shape of the apparatus main body is used. Since the cable can be pulled out from the distal end portion and pulled to be laid in the connection conduit portion, the cable can be conducted smoothly, reliably, and unmanned without breaking the cable.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a derivative flowing along a water flow while conducting a rope in a pipeline in a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a derivative flowing in a branch pipe connected to a main pipe in the first embodiment of the present invention.

FIG. 3 is an explanatory view showing a conductor flowing in a main line connected to a branch line in the first embodiment of the present invention.

FIG. 4 is an explanatory view showing a state in which a derivative flowing in a main line connected to a branch line is pulled by a locking rod in a direction opposite to a direction in which water flows in the first embodiment of the present invention. It is.

FIG. 5 is an explanatory view showing a cable laying device moving in a branch conduit in a second embodiment of the present invention.

FIG. 6 is an explanatory view showing a cable laying device in a state where a cable is being laid while being fixed in a branch conduit connected at a right angle to a main line conduit in a second embodiment of the present invention. .

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Derivative 3 Rope 4 Main line conduit 5 Branch line 11 Device main body of cable laying apparatus 12 Tube 12a Half trumpet-shaped tip 13 Cable 14 Main line conduit 15 Branch conduit 16 Fixed projection

Claims (3)

[Claims] 1. In a connection pipe section of two sewers,
From the upstream pipe of the sewer to the downstream pipe, the derivative connected to one end of the rope was made to flow using the water flow of the sewer to conduct, and then directly or indirectly connected to the other end of the rope. A method for conducting and laying a cable in a connecting pipe section of a sewer, wherein the cable is pulled and laid. 2. In a connection pipe section of two sewers,
A pipe body of a fixed length penetrating back and forth is provided in an apparatus main body provided movably back and forth in a pipe, and at least a part of a tip end of the pipe body protruding from the front surface of the apparatus body is expanded in a trumpet shape. Formed, the angle of the trumpet-shaped curved surface is provided at an angle equal to or greater than the bending allowable radius of the cable to be laid, and the pipe having the trumpet-shaped tip is rotatably provided about the central axis of the pipe, After the rope that has been conducted through the conduit is inserted through the conduit of the device main body, the device main body is advanced through the conduit to reach a connection point, and then the above-mentioned is formed from the trumpet-shaped tip of the device main body. A method of conducting and laying a cable in a connection pipe of a sewer, wherein a cable connected directly or indirectly to an end of a rope is pulled out and laid in the other pipe. 3. An apparatus main body is provided so as to be movable back and forth in a pipeline, a pipe of a fixed length penetrating the apparatus main body back and forth is provided, and a distal end portion of the pipe protruding from a front surface of the apparatus main body. At least a part is formed in a trumpet-like shape, and the angle of the trumpet-shaped curved surface is set to an angle equal to or larger than the allowable bending radius of the cable to be laid. Provided rotatably about the axis, let the rope that has been conducted in the pipeline pass through the tubular body of the device body,
A cable laying device in a sewer connection pipe section, wherein a cable directly or indirectly connected to an end of the rope is passed through the pipe and led out from a trumpet-shaped tip.