JPS5854567B2 - Hikitome Clamp - Google Patents

Description

[Detailed Description of the Invention] In the construction work of overhead power transmission lines, the wire extension work involves handing over the power transmission line onto a metal wheel, and then adjusting the line to an appropriate slack and securing it to the insulators. Security line work will be carried out.

This may be due to the recent labor shortage in the power transmission line construction industry or the emergence of labor-saving power transmission line construction methods due to increased demands for safety and ease of work.

In order to meet this demand, the applicant has filed a separate application for a prefabricated overhead wire construction method.

(For example, Japanese Patent Application No. 45-106149) This content is based on the fact that the span of the steel tower is measured in advance by Seiya.
The wires are accurately measured and cut to the required length for erection with the required slack, and the wires are stretched by crimping the restraining clamps on the ground. This is to keep it in check.

This construction method eliminates the need for wire drawing, which is inherently dangerous and requires a large number of skilled workers, in the construction of overhead power transmission lines, resulting in significant labor savings and improved safety. .

However, even if the prefabricated overhead wire construction method is adopted, when securing the retaining clamp to the insulator link, a come-along is attached to the wire as in the past, and the end of the bow clamp is attached.
It must be pulled together so that the ends of the insulators can be secured together.

Therefore, it is essential to save labor in the work of come-along installation, which is extremely dangerous and requires a high degree of skill, in order to further enhance the advantages of the prefabricated overhead wire construction method.

This invention was made in view of such demands.

This will be explained below using examples.

FIG. 1 is an explanatory diagram showing a conventional retaining clamp, and the retaining clamp 1 has a hole 3 for locking and connecting to an insulator chain 2. As shown in FIG.

In order to connect the hook 4 of the insulator chain 2 to the connecting hole 3, a worker must move from a high place over the wire, attach the come-along 5 to the wire 10, and attach a pulley or other device to the wire. Attach the lino wire 6 and pull the retaining clamp 1 together with the electric wire 10.

Attaching and removing the come-along for this purpose required a high degree of skill, and there was a great risk of breakage.

FIG. 2 shows an embodiment of the retaining clamp according to the present invention, in which the end of the retaining clamp 1 has a slightly C-shaped hole 3', and one end of the hole 3' has a mesh as shown in the figure. The sender wire 7 is connected to the other end, and the hook 4 of the insulator chain can be connected to the other end in the state 11.

In this way, the tensioner wire 7 itself is used to pull the retaining clamp 1 and the insulator link 2 together, and in this state, the insulator link hook 4 is connected to the hole 3' of the retaining clamp.

Since it is only necessary to remove the metsenger wire after the insulator chain is connected, there is no need for the conventional come-along installation work.

FIG. 3 shows another embodiment of the connecting hole of the retaining clamp.

In the present invention, the shape of the hole is not limited to these shapes, and any hole shape may be used as long as the insulator hook can be connected to the button without removing the mesh wire.

The hole for the messenger wire may be hook-shaped with a portion open, and it goes without saying that a separate hole may be provided as shown in FIG. 4 depending on the case.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional retaining clamp, and the second
FIG. 4 is an explanatory view showing an embodiment of the retaining clamp according to the present invention. 1: Retaining clamp, 2: Insulator link, 3: Insulator link connection hole, 3
′: Hole connecting both the metsenger wire and the insulator chain, 7: metsenger wire, 10: electric wire.

Claims (1)

[Claims] 1. Prior to the installation of the overhead line, the length of the electric wire necessary to install the overhead line with the required slack in the span of the tower, which has been precisely measured in advance, is accurately measured and cut, and the end of the wire is placed on the ground with a wire hook. A retaining clamp having a connecting hole for wire locking and a connecting hole for locking an insulator connection is crimped and extended, and the end portion of the insulator link is connected and retained to the connection hole for locking the 11 insulator connections. method of constructing overhead power transmission lines.