JPH07105771A - Tandem stretching yoke metal fitting - Google Patents

Abstract

PURPOSE:To prevent the application of abnormal force to the other side insulator string even one side insulator string is cut by forming notched parts respectively on the outside of the clevis fitting attached part of a tandem stretching yoke metal fitting. CONSTITUTION:The top part of the triangular part of one side yoke metal fitting 1a is connected on an iron tower side, and a power line is top-mounted on the top part of the triangular part of the other side yoke metal fitting 1b. Insulator strings 2a and 2b of given length are provided at a given interval via a clevis metal fitting 3 between both the fittings 1a and 1b, and notched parts 5 are provided respectively outside of the attaching parts (b) of the clevis fittings 3 of a pair of yoke metal fittings 1a and 1b. Consequently the clevis metal fittings 3 can be freely rotated not to apply a large shock load to the insulator string 2a even, the insulator string 2b, for example, causes a cutting accident to rotate the yoke metal fitting 1a with the attaching part (a) on the steel tower side as a supporting point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-strength yoke member for tension, and in particular, even if one of the two insulator chains has a disconnection accident, the other insulator chain is connected to the other insulator chain. The clevis metal fittings of the one series of insulators are such that abnormal force does not act on them.

[0002]

2. Description of the Related Art FIG. 3 is a plan view of a two-piece tension-resistant device using conventional two-piece tension-resistant yoke fittings (hereinafter referred to as fittings) 10a and 10b.

Of the two metal fittings 10a and 10b, the one end (the right side in FIG. 3), which corresponds to the top of the triangle of the metal fitting 10a, is connected to the tower side (not shown) and the other end (the left side in FIG. 3). The portion of the metal fitting 10b that abuts the top of the triangle is configured to stretch four power transmission lines (not shown). Then, between the metal fittings 10a and 10b, a portion corresponding to the long side portion of the metal fittings 10a and 10b has a pair of insulators 2a and 2b having a predetermined length.
, Are provided via the clevis metal fittings 3, 3 ... At predetermined intervals. Reference numerals 4a and 4b in the figure denote arc horns, which are provided so as to project from the metal fittings 10a and 10b, respectively, and the arc horns 4a and 4b are kept at a predetermined interval.

[0004]

However, in the above-mentioned conventional metal fittings, when one of the two insulator chains, one of the insulator chains, has a disconnection accident, the metal fitting and the clevis metal fitting collide strongly with each other, and However, there was a drawback in that an abnormal force was applied to the single insulator and the clevis metal fittings of the insulator.

A further explanation will be given with reference to FIG. 4. When the two pairs of insulators 2a, 2b are normal, the clevis metal fitting 3,
3 is attached to the metal fittings 10a and 10b at a predetermined normal attachment angle. However, since the insulator ream has a cement welded portion due to its structure, it may rarely cut. For example, if the insulator ream 2b causes a cutting accident at the portion indicated by the cross mark in FIG. , The metal fittings 10a, 10b are
Rotate around the attachment parts a on the steel tower side and the electric wire side (see the chain line in FIG. 4).

For this reason, a part of the clevis metal fitting 3 and the metal fittings 10a, 10b collide with each other in an impact, and an impact load of 2 to 3 times that in the normal state is applied to the other one insulator 2a. At the same time, an abnormal force acts on the collision portion between the clevis metal fitting 3 and the metal fitting 10a (see FIG. 4B). Note that FIG.
Shows only the metal fitting 10a, but the other metal fitting 10a
The same applies to b.

Therefore, the present invention has been made to solve the above-mentioned drawbacks, and an object thereof is to suppose that even if one of the two insulator chains causes a disconnection accident, The purpose of the present invention is to provide a metal member that does not exert an abnormal force on the remaining one insulator member and its clevis metal member.

[0008]

In order to achieve the above-mentioned object, a double-stretch-proof yoke metal fitting according to the present invention is a metal fitting which is provided at each end of each of two insulator chains via a clevis metal fitting. Then, a notch is formed in the metal fitting by cutting out a portion opposite to the opposing mounting portion of the pair of clevis metal fittings attached to the metal fitting, and each clevis metal fitting can rotate to the notch side around the mounting portion. It is characterized by doing so.

[0009]

In the above structure, the clevis fitting can be freely rotated around the mounting portion toward the notch so that a part of the clevis fitting does not collide with the fitting.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in FIGS. 3 and 4 will be described using the same reference numerals.

FIG. 1 is a plan view of a two-strength tensioning device using metal fittings 1a and 1b according to one embodiment.
a and 1b have a substantially triangular shape.

One of the metal fittings 1a, 1b (see FIG. 1)
The right side of the metal fitting 1a, which corresponds to the top of the triangle, is connected to the tower side (not shown) and the other end side (left side in FIG. 1).
The portion of the metal fitting 1b that touches the triangular top is not shown in the figure.
It is configured to stretch a book transmission line. And
2 between the metal fittings 1a and 1b, which is the long side
Insulator stations 2a, 2b having a predetermined length are provided via clevis metal fittings 3, 3 at predetermined intervals. In the figure, 4a and 4b are arc horns, and the metal fitting 1
The arc horns 4a and 4b are provided so as to project from a and 1b, respectively, and a predetermined distance is maintained between the arc horns 4a and 4b.

Since the metal fittings 1a and 1b have the same structure,
Referring to FIG. 2, which is an enlarged view of the left side metal fitting 1b, the mounting portions b of the pair of clevis metal fittings 3, 3 are cut away at the portions opposite to the mounting portions facing each other, and the cutout portions are formed. 5, 5 are formed. The size of the cutout portion 5 is determined so that a predetermined thickness is provided around the mounting portion b so that the mounting portion b can maintain a predetermined strength, and the mounting portion a side to the steel tower side is slightly larger. I try to bite into it (see Fig. 2).

Therefore, for example, even if the insulator string 2b causes a disconnection accident at the portion marked with X in FIG. 3 and the metal fitting 1a rotates about the mounting portion a to the tower side as a fulcrum, the clevis metal fitting 3 is , It can be freely rotated as shown by the chain line in FIG.

Therefore, the clevis fitting 3 is the fitting 1a.
Therefore, a strong collision will not occur at a part, and a large impact load will not be applied to the remaining one insulator pair 2a.

Similarly, since the metal fitting 1a on the other end side also has the notch 5, it does not collide with the clevis metal fitting 3. Further, even if the insulator string 2a is cut, the other notch 5 prevents the clevis fitting 5 from colliding.

[0017]

Since the metal fitting according to the present invention is provided with the notch formed by cutting the opposite side of the mounting portion of the pair of clevis metal fittings attached to the metal fitting, the clevis metal fitting can freely rotate, Even if one of the insulator reams causes a disconnection accident, the metal fittings and the clevis metal fittings will not come into shock contact with each other, and a large impact load will not be applied to the remaining one insulator ream. The safety of the metal fittings is maintained.

[Brief description of drawings]

FIG. 1 is a plan view of a double continuous tension device using a metal fitting according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the metal fitting of FIG.

FIG. 3 is a plan view of a double tension device using conventional metal fittings.

FIG. 4 is an enlarged view of the metal fitting of FIG.

[Explanation of symbols]

 1a, 1b Two-piece tension-resistant yoke metal fittings (metal fittings) 2a, 2b Insulator connection 3 Clevis metal fittings 5 Notch part b Mounting part

Claims (1)

[Claims] 1. A double-strength yoke metal fitting, which is provided at both ends of each of the two insulator lugs via clevis fittings, wherein the double-strength yoke metal fitting is provided on the double-strength yoke metal fitting. The pair of clevis metal fittings attached to the metal fittings has a notch formed by cutting away the opposite side of the mounting portion, and each clevis metal fitting is configured to be rotatable around the attachment portion toward the notch. Two-strength tensile yoke metal fittings.