JPS6125135Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a branched cable used for supplying power to, for example, a torque check tool or a nut runner.

Generally, a steel tower that supports overhead power transmission lines is assembled by tightening a large number of steel members with bolts, and the tightening torque of the bolts is checked using a nut runner.

By the way, the joints of steel materials are installed at a pitch of about 6m, and in a 500Kv class steel tower, the height is
Since it is 120 to 150 meters long, each tower may have more than 20 joints.

On the other hand, as a cable for feeding power to the nut runner, a so-called branched cable is used, in which branch lines are attached at predetermined intervals to a main cable including reinforcing wires.

As shown in Fig. 1, the tip end 1 of this branched cable is fixed to the top of the steel tower 2, and the branch lines 3, which are attached at intervals of about 6 m, are suspended in the air. The power source from the generator 4 is secured by connecting a nearby branch line to the nut runner.

However, in a branch cable with such a configuration, only the reinforcing wire of the cable is fixed to the top of the tower, so the insulated wire core may slip in the axial direction due to the weight of the trunk cable or branch cable.
As a result, an unreasonable load is applied to the branch line attachment portion, which has the disadvantage of causing branch line breakage and short-circuit accidents.

This invention was made based on the above circumstances,
It is an object of the present invention to provide a branched cable that does not cause slippage between the reinforcing wire and the insulated wire core even when used in the above manner.

That is, the present invention provides an insulated wire core on the outside of the reinforcing wire, and attaches branch wires at predetermined intervals to a trunk cable that is formed by providing a sheath on the outside, and attaches the axis of the insulated wire core to the branch wire attachment portion. In the device provided with a slip prevention part for restraining sliding in the direction, the slip prevention part includes a diameter increasing body fixed to the outer periphery of the reinforcing wire and an insulated wire core attached to the outer periphery of the diameter increasing body. The present invention relates to a cable with a branch, characterized in that it is constituted by a bundle that is tightly tied to the outer periphery of the reinforcing wire at an upper position of the diameter increasing body.

Hereinafter, the present invention will be explained based on the drawings of one embodiment. In FIG. 2, the branched cable 5 is composed of a trunk cable 6 and branch lines 7 attached to the cable at predetermined intervals, for example, every 6 m.

As shown in FIG. 3, the trunk cable 6 has a reinforced wire 9 made of stranded steel wire or the like with a coating layer 8 provided on the outer periphery.
, an insulated wire core 10 provided on the outside, and a sheath 12 provided on the outside with a restraining tape 11 interposed therebetween.

The branch wire 7 is composed of an insulated wire core with an insulator such as soft vinyl chloride resin on the outer periphery of a flexible conductor, which is twisted into three strips, and a sheath made of soft vinyl chloride resin or the like is provided around the outer periphery of the insulated wire core. has been done.

As shown in FIG. 4, the attachment part 13 of the branch line is a main cable 6 exposed by peeling off the required covering member.
and each conductor 14, 15 of branch line 7 to C
A conductor connection part 17 that is compressed and connected by a mold sleeve 16, an insulating tape winding layer (not shown) that covers the outer periphery of this connection part, and a molded body 18 made of soft vinyl chloride resin or the like that covers the entire conductor connection part. It consists of

As shown in FIG. 5, the anti-slip portion 19 includes a C-shaped diameter increasing body 20 that is compressed and connected to the outer periphery of the reinforcing wire 9.
Then, the insulated wire core 10 attached to this outer periphery is attached to the diameter increasing body 2.
Binding body 2 tied around the outer periphery of reinforcing wire 9 at the upper position of 0
It consists of 1. The diameter increasing body 20 is not limited to a C-shaped compression sleeve, but may be any type as long as it is firmly fixed to the outer periphery of the reinforcing wire and increases the diameter of the reinforcing wire. As the binding body 21, a band, hemp cord, or a C-shaped ring is used, but the present invention is not limited thereto, and any material that can tightly tie the reinforcing wire core 10 to the outer periphery of the reinforcing wire 9 may be used.

Furthermore, in the embodiment shown in FIG. 4, a case has been described in which the anti-slip part 19 is provided on the upper part of the branch line attachment part, and these two parts are integrated by the molded body 18, but the present invention is limited to this. For example, the anti-slip part may be formed independently on the upper part of the branch line attachment part.

In addition, in the figure, 22 is an untwisting device, 23 is a trunk cable retaining part, 24 is a branch cable for trunk connection, 2
Reference numeral 5 indicates a trunk cable connection portion, and numeral 26 indicates a nut runner connection portion.

In the above-mentioned present invention, a cable with a branch is formed by providing a slip prevention part of the insulated wire core at the upper position of the branch line attachment part, so that the force that tends to droop due to the weight of the branch line is absorbed against the main cable. Therefore, even if the tip of the cable is fixed to the top of the tower and suspended, there is no risk of the insulated wire core slipping as in the past. Therefore, when using the branched cable of the present invention, even if a vertical load on the main line or abnormal tension is applied to the main line, the branch line may break or a short circuit between the insulated wire cores may occur. There's nothing to do.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a state in which a cable with a branch is suspended and laid on a steel tower, Fig. 2 is an explanatory diagram of the cable with a branch, and Fig. 3 is a cross-sectional view of the trunk cable.
FIG. 4 is a partially omitted explanatory view of the branch line attachment part and the slip prevention part in the present invention, and FIG. 5 is an enlarged view of the slip prevention part. 5... Cable with branch, 6... Trunk cable,
7... Branch wire, 9... Reinforcement wire, 10... Insulated wire core, 13... Branch wire attachment part, 18... Mold body, 19... Slip prevention part, 20... Diameter increase body, 2
1...A united body.

Claims (1)

[Scope of utility model registration request] An insulated wire core is provided on the outside of the reinforcing wire, and branch wires are attached at predetermined intervals to a main cable formed by providing a sheath on the outside of the reinforcing wire, and the sliding in the axial direction of the insulated wire core is restrained at the branch wire attachment portion. In the device, the slip prevention portion includes a diameter increasing body fixed to the outer periphery of the reinforcing wire, and an insulated wire core attached to the outer periphery of the diameter increasing body. A cable with a branch, characterized in that it is constituted by a bundle that is tightly tied to the outer periphery of the reinforcing wire at an upper position.