JP3347943B2 - Power line clamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an overhead power transmission line clamp, and particularly to an installation and an assemblage for ground work as much as possible, and in a clamp for gripping a transmission line, particularly, a nut coming off and falling off. Thus, a clamp capable of preventing the above problem can be assembled at the production site and provided to the user.

[0002]

2. Description of the Related Art As shown in FIGS. 5 and 6, a conventional overhead power transmission line gripping clamp has an overhead power transmission line 1 wound around an armor rod 3 via a rubber spacer 2 which is divided into two parts. Attach 4a, 4b and tighten
It was banded at 0 and tightened and gripped. The tops of the split hanging brackets 4a and 4b and the fastening bracket 10 have a spacer mounting space E so that the end of the inter-phase spacer can be inserted. The bolt 6b is inserted and fixed with the nut 7b. A pin 11 is provided at the tip of the bolt 6b to prevent the pin from coming off.

[0003]

According to the prior art as described above, the number of parts is large, such as the hanging metal being formed in two, and the hanging metal is gripped on the overhead transmission line and the interphase spacer is fixed. Is performed with the bolts and nuts at the end of assembly, so there is a problem in the safety of work, many parts must be carried to a high place, etc. In some cases, there was a risk of injuries to those who were below.

In view of the above circumstances, the inventor of the present invention has made intensive studies and, as shown in FIGS. 7 and 8, has devised an integral structure in which the hanging metal body is hinged to each other with hinge pins. This will be described with reference to the drawings.
Are clamped around the armor rod 3 via the rubber insert 2, and the hanging metal bodies 4 a and 4 b are configured to be openable and closable with hinge pins 5.
The upper portions a and 4b are integrally connected by a hexagonal bolt 6 and a hard lock nut 7, and the extending portion for attaching the spacer of the hanging metal member 4a is provided with a bifurcated projection 4a-E to insert the attaching end of the inter-phase spacer. A grip clamp provided with a round head square bolt 8 and a hard lock nut 9 for fixing by fixing has been devised. Other This clamp the parts is low, since the clamping bracket is improved workability to become unnecessary, there is mounted a ground working portion gripping the work and so divided the electric wires of the phase spacers, the workability It can greatly contribute to improvement.

[0005] However, since the connection by the hexagonal bolt 6 and the hard lock nut 7 for retaining the power transmission line is performed at a high place, carrying such a fine bolt or nut to a high place may cause a danger of falling on the rabbit corner. It is a difficult task to hold the bolt and nut and the flat washer with one hand so that they will not be lost.If the part is dropped, the work will be interrupted for a long time, Since the problem of loss still exists, replenishment was required, and improvement in this respect was awaited.

[0006]

SUMMARY OF THE INVENTION The present invention is an improvement on the above-mentioned problems, and an outline of the invention is a clamp for winding an overhead power transmission line 1 around an armor rod 3 via a rubber insert 2 and holding the same. And a hexagonal bolt 6, a hard lock nut 7, and a fork of the hanging metal body 4a, which integrally connect the hanging metal bodies 4a, 4b at an upper portion thereof. It consists of a round head square root bolt 8 and a hard lock nut 9 whose tops are fastened to an interphase spacer, and inserts a T-shaped nut stopper 6-a into the end of the hexagon bolt 6 to attach a spring pin 6 to the hexagon bolt 6. This is a transmission line gripping clamp fixed at b. The T-shaped nut drop-out prevention tool 6-a is made of, for example, plastic such as polyethylene, and after the nut is tightened, it is extremely easy to cut, break, or bend at the end face of the bolt.

[0007]

FIG. 1 is a cross-sectional view showing an attached state of a transmission line according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a hexagonal bolt after tightening a hard lock nut on the above-mentioned hexagonal bolt. T-shaped nut drop-out prevention tool 6-a at the tip of 6
4A and 4B are plan views showing an example of a T-shaped nut falling-off prevention tool 6-a.

1 and 2, the present invention is a clamp for winding an overhead power transmission line 1 around an armor rod 3 through a rubber insert 2 and holding the same.
4b is configured to be freely opened and closed by a hinge pin 5. At the upper parts of the hanging metal bodies 4a and 4b, they are integrally connected by a hexagon bolt 6 and a hard lock nut 7. in this case,
The tip of the hexagonal bolt 6 is provided so as to protrude from the hard lock nut 7, and the tip of the T-shaped nut drop-out prevention tool 6-6 is provided at the tip.
a is inserted and fixed with a spring pin 6-b. The detailed structure is as shown in FIG. 3. The T-shaped nut stopper 6-a is usually made of polyethylene, and after the hexagon bolt 6 is inserted into a predetermined hole of the hanging bracket main body 4a, the flat washer 101, the hard lock Screw in the hexagon bolt 6 in the order of the nut 7. Next, the leg of the nut drop-out prevention tool 6-a is inserted into the hole at the top of the hexagon bolt 6, and is fixed to the hexagon bolt 6 with the spring pin 6-b. Such a product is produced in a factory, transported to a customer, and used at a construction site for mounting on an overhead power transmission line.

As can be understood from FIG. 3, when attaching the hard lock nut 7 and the flat washer 101 to the overhead transmission line using the hanging metal fittings in the field, loosening the nut 6-a Is locked by the locking portion x of the head and stays on the leg y so that it does not drop. Then, after the completion of the work of assembling the suspension fitting to the overhead power transmission line, the nut falling-off prevention tool 6-a cuts off the exposed length of the leg portion y, bends off, or bends.

FIG. 4 shows an example of the structure of the nut drop-off prevention tool 6-a.
1 and can be held while fitted on the leg y. In FIG. 3A, the leg y has a constant width and is provided with a notch so that it can be easily cut or cut later, so that bending is easy, but this portion is usually an exposed end. Also, in the figure (b), since the width of the leg part y is tapered as it reaches the insertion part into the bolt, it is more resistant to impact than the structure of the above (a).
There is no danger of breakage due to an impact before regular installation work such as during transportation. Of course, cutting and bending can be easily performed in a regular operation.

[0011]

The opening / closing of the hanging bracket main body 4b prevents the hard lock nut 7 and the flat washer 101 from falling off while taking advantage of the operational features of the above-described structure in which the hanging bracket can be freely opened and closed by the hinge pin. The main body 4a, 4b is connected integrally with the hexagon bolt 6 and the hard lock nut 7 at the upper part after the transmission line is attached. The tip of 6 is provided so as to protrude from the hard lock nut 7, and a T-shaped nut drop-out prevention tool 6 -a is inserted into the tip and is fixed with a spring pin 6 -b, so that a clamping clamp for the transmission line is provided. When mounting the
There is no danger that the hard lock nut 7 and the flat washer 101 will fall and be lost, and this has the advantage that the assembling work at a high place can be performed very easily. Also, since a metal fitting with a hard lock nut 7 and a flat washer 101 for preventing the fall of the flat washer 101 during the mounting work can be produced at the factory and provided to the user, the number of parts when installing the power transmission line is greatly reduced. Is done.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a mounting structure of a transmission line gripping clamp according to the present invention.

FIG. 2 is a front view of a mounting structure of a transmission line gripping clamp according to the present invention.

FIG. 3 is an enlarged plan view of a connecting portion between a hexagon bolt and a hard lock nut according to the present invention.

FIG. 4 is a plan view showing the structure of a nut drop prevention device used in the present invention.

FIG. 5 is a cross-sectional view of a conventional structure for mounting a transmission line gripping clamp.

FIG. 6 is a front view of a mounting structure of a conventional transmission line gripping clamp.

FIG. 7 is a cross-sectional view of a mounting structure of a transmission line gripping clamp according to the base technology.

FIG. 8 is a front view of a mounting structure of a transmission line gripping clamp according to the base technology.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Overhead power transmission line 2 Rubber insert 3 Armor rod 4a Hanging bracket main body 4b Hanging bracket main body 4a-E Bifurcation protrusion 5 Hinge pin 6 Hexagon bolt 6-a Nut drop-off prevention tool 6-b Spring pin 7 Hard lock nut 8 Round head square bolt 9 Hard Lock nut 6b Bolt 7b Nut 10 Fastening bracket 101 Flat washer E Spacer mounting space x Flat locking part y Leg

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-58-34212 (JP, A) JP-A-7-203624 (JP, A) JP-A-4-26315 (JP, A) JP-A 8- 256424 (JP, A) JP-A-9-331617 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 7/00

Claims (3)

(57) [Claims] 1. A clamp for winding an overhead power transmission line 1 around an armor rod 3 via a rubber insert 2 and gripping the overhead transmission line 1. The suspension metal fittings 4a and 4b are configured to be openable and closable by a hinge pin 5, and are suspended at an upper portion thereof. A hex bolt 6 and a hard lock nut 7 for integrally connecting the metal fitting bodies 4a and 4b;
It consists of a round head square root bolt 8 and a hard lock nut 9 for holding the forked top 4a-E of the hanging bracket main body 4a to the interphase spacer, and inserts a T-shaped nut drop-out prevention tool 6-a into the tip of the hexagonal bolt 6. And a power line gripping clamp fixed to the hex bolt 6 with a spring pin 6-b. 2. The transmission line grip according to claim 1, wherein the T-shaped nut stopper 6-a is made of polyethylene, and has a flat locking portion x and a long plate-like leg y having the same width. Clamp. 3. The T-shaped nut stopper 6-a is made of polyethylene and comprises a flat locking portion x and a plate-like leg portion y whose width is tapered toward its tip. The transmission line holding clamp according to claim 1.