JPH09172711A - Cable laying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense the tension in laying a power cable, and lessen the burden added to the power cable, and making a boring machine compact, by arranging the boring machine (cable supply machine) on the way, and laying the cable. SOLUTION: A rail 3 is laid on the ceiling of a tunnel, and this rail 3 is provided with a plurality of trolleys, and power cables 1 are supported, being scattered with a cable hanging rope 4. Frames are made at fixed intervals of boring machine supporting members 9 within the tunnel, and here a boring machine is fixed with a bolt, etc. Accordingly, the power cable 1 supported, with its weight dispersed, is sent out being caught with the boring machines 8 arranged at specified intervals, and it can be extended long without adding large tension to the tip of the power cable 1. Moreover, an electric roller may be used in place of this boring machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laying a power cable.

[0002]

2. Description of the Related Art A conventional hanger rail type power cable drawing method will be described below with reference to the accompanying drawings. FIG. 3 is an explanatory diagram showing a conventional method of laying a power cable when using a winch, and FIG. 4 is an explanatory diagram showing a conventional method of laying a power cable when using an indexing device. That is,
In FIG. 3, the power cable 1 is moved to the left side by winding the wire 7 by driving the winch 5 with the wire 7 attached to the tip end while dispersing and supporting the weight of the trolley 4 provided on the rail 3. This is a method of extending the power cable. Also, in FIG.
A plurality of trolleys 4 provided on the rail 3 disperse and support the weight thereof, and a self-propelled indexing device 6 is provided on the rail 3, whereby the power cable 1 is extended to the left.
The index device 6 is of a battery type or a power feeding type.

By the way, when the power cable to be laid is long and heavy, the drawbacks of the above-mentioned conventional laying method will be listed below. The capacities of the winch and the index device must be increased, and the winch and the index device become large. In the laying method using the winch shown in Fig. 3, the wire becomes longer as the power cable becomes longer,
A “measurement phenomenon” occurs due to the extension of the wire when it is extended, making it difficult to extend the power cable. In the laying system using the indexing device shown in FIG. 4, when the tension required for extending the power cable increases, the indexing device itself also increases, which causes a problem in performance. In either case, large tension is generated at the tip of the power cable.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, "to disperse the tension when laying the power cable, reduce the load applied to the power cable, and disperse the tension. To reduce the size of the holing machine (cable feeding device), and to provide an improved electric power cable laying method.

[0005]

The present invention relates to a hanger rail system, which is one means of a cable laying system, wherein a cable is laid by arranging a holing machine (cable feeding machine) in the middle. Is the way.

By adopting a holing machine for the hanger rail construction method, it becomes possible to disperse the tension when the power cable is extended without concentrating it on the tip of the power cable. For this reason, when the power cable becomes long, when the power cable is pulled out or when the power cable is temporarily interrupted and then restarted, a large load is applied to the winch or the index device by the conventional method, but the load is dispersed by this method. Therefore, the capacity of the holing machine can be small.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view for explaining a laying method using a holing machine, and FIG. 2 is a sectional view of FIG. That is, for example, the rail 3 is laid on the ceiling of the cave. A plurality of trolleys 2 are provided on the rail 3, and the cable suspension ropes 4 disperse and support the power cable 1. On the other hand, a frame is formed in the cave with the holing machine support material 9 at regular intervals, and the holing machine 8 is fixed thereto by bolts or the like.

Therefore, the power cable 1 which is dispersed and supported by weight is sandwiched and sent out by the holing machine 8 arranged at a predetermined interval, and is extended long without applying a large tension to the tip of the power cable 1. Lines are possible.

In the above example, the electric power cable is sent out by the holing machine, but an electric roller may be used instead of the holing machine.

[0010]

As described above, according to the cable laying method of the present invention, it is possible to disperse the tension at the time of extending the power cable without concentrating it on the tip of the power cable by using the holing machine for the hanger rail laying method. Become. Therefore, when the length of the power cable becomes long, a large load is applied to the winch or the traction device in the conventional method when the power cable is pulled out or when the power cable is temporarily suspended and then restarted. Therefore, the capacity of the holing machine can be small.

[Brief description of the drawings]

FIG. 1 is an explanatory view for explaining a cable laying method of an embodiment,

FIG. 2 is a sectional view of FIG. 1,

FIG. 3 is an explanatory view for explaining a conventional cable laying method,

FIG. 4 is an explanatory diagram for explaining another conventional cable laying method.

[Explanation of symbols]

 1 power cable 2 trolley 3 rail 4 cable suspension rope 5 winch 6 indexing device 7 wire 8 holing machine 9 holing machine support material

Claims (1)

[Claims] 1. A cable laying method, wherein a cable is laid in a hanger rail system, which is one of the means for laying a cable, with a holing machine (cable feeding machine) disposed midway.