JP2799608B2 - Suspension fixing tool for high pressure pull-down cable - Google Patents

Description

Description: BACKGROUND OF THE INVENTION (Industrial application field) The present invention relates to a fixing tool for suspending a high-voltage pull-down cable used on a utility pole when a tool for a high-voltage distribution line or the like is used.

(Prior art) When performing maintenance and inspection or repair of high-voltage distribution lines, it is conceivable to stop a section of the distribution line to ensure safety. It is desirable to do.

Therefore, an uninterruptible construction method of laying a bypass cable in a construction section has been developed. At the end of the bypass cable, a high-voltage pull-down cable temporarily connected to a distribution line on a power pole is used.

FIG. 3 is a front view of a main part of a utility pole to which such a high-voltage pull-down cable is attached.

In the figure, a terminal end of a distribution line 3 is fixed to an arm 1 of a utility pole using a fixing fitting 2. This distribution line 3
It is a cable for wiring to high voltage consumers. A bushing 4 is provided at the end of the high-voltage distribution line 3, and a bus 6 is connected to a conductor extraction rod 5 extending from the inside thereof, and is electrically connected to a switch (not shown). When constructing the distribution line, the switch is opened to electrically disconnect the high-voltage distribution line 3 from other distribution lines connected via a switch (not shown).

Power is supplied to the high-voltage distribution line 3 shown in the drawing from another distribution line (not shown). After the switch is opened, the power is supplied via the high-voltage pull-down cable 7 shown in the drawing. A cable head 8 is provided at the end of the high-voltage pull-down cable 7, and a lead wire 9 is drawn out from a tip end of the cable head 8 and is connected to a conductor drawing rod 5 on the bushing 4.

Note that, in order to support the cable head 8 of the high-voltage pull-down cable 7, the arm 1 and the cable head 8 are bound by a retaining lobe 10.

(Problems to be Solved by the Invention) By the way, the conventional high-voltage pull-down cable as described above is suspended using the retaining rope 10 with respect to the armrest 1 of the telephone pole, so that it is easily moved by external force, The distance between the grounded hardware such as the arm of a telephone pole and the cable head 8 could not be reliably ensured, and there was a safety problem. Usually, in the case of a three-phase distribution line, the cable head 8
Are suspended from a telephone pole. When these are shaken by wind or the like, the phase interval is not stabilized, and there is also a safety problem.

The present invention has been made in view of the above points, and an object of the present invention is to provide a high-voltage pull-down cable suspension fixing tool that can easily and safely support and fix a high-voltage pull-down cable to a utility pole. It is.

(Means for Solving the Problems) According to the present invention, a tool for suspending and fixing a high-voltage pull-down cable includes a grip portion for gripping an arm of a utility pole, a vertical portion connected to the grip portion and vertically suspended downward, and a lower end of the vertical portion. An arm having a horizontal portion extending in the horizontal direction from the arm portion, a C-shaped portion through which a high-pressure pull-down cable is inserted, and a cable head is placed on the upper surface thereof, And a fixing member for fixing the retaining saddle fixed to the head on the horizontal portion.

(Operation) The above-mentioned suspension fixing tool can securely and firmly fix its position by fixing the grip portion to the arm of the electric pole. Further, a C-shaped portion on which a cable head can be easily mounted is provided on a horizontal portion of the arm portion which protrudes just like an arm with an elbow bent. Furthermore, since the retaining saddle fixed to the cable head is fixed on the horizontal portion using the fixing member, the cable head can be mechanically and firmly supported and fixed at a fixed position.

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

FIG. 1 is a front view of an embodiment of a tool for fixing a high-voltage pull-down cable according to the present invention. FIG. 2 is a top view thereof.

In FIG. 1, the fixing tool 20 for suspending has a holding portion 21 in which a metal plate is formed in a U-shape in order to hold the arm 1 of a utility pole. The grip 21 has a wedge in the vertical direction.
In order to insert 22, a through hole 21 a as shown in FIG. 2 is provided.

That is, the grip portion 21 just surrounds the upper and lower surfaces and the side surfaces of the arm member 1, and the wedge 22 is inserted into the through hole 21a so as to be in contact with the other side surface of the arm member 1. Therefore, if the wedge 22 is sufficiently inserted into the through hole 21a, the arm 1 is firmly gripped by the U-shaped portion of the grip 21 and the wedge 22.

On the outer surface of the grip portion 21, an arm portion 23 having an elbow just bent is fixed by welding or the like. This arm 23
The vertical portion 24, which is continuous with the grip portion 21 and hangs vertically downward,
And a horizontal part extending horizontally from the lower end of the vertical part 24
Has 25. The vertical part 24 and the horizontal part 25 are linearly connected by a reinforcing plate 26 in order to secure mechanical strength. On the other hand, the horizontal portion 25 has a C-shaped portion 27 at one end as shown in FIG. This C-shaped part 27
The lower end of the cable head 8 of the high-voltage pull-down cable 7 is fitted into the round hole 27a. Therefore, in the case of the embodiment shown in FIG.
a is molded.

The width of the notch 27b of the C-shaped portion 27 is selected to be slightly wider than the outer diameter of the high-pressure pull-down cable 7. As a result, as can be seen from the figure, the high-pressure pull-down cable 7 is guided to the round hole 27a through the notch 27b of the C-shaped portion 27, and the cable head 8 is lowered downward. Insert into the round hole 27a. This prevents the cable head 8 from falling off from the C-shaped portion 27 even if lateral pressure or the like is applied to the cable head 8 thereafter.

On the other hand, an oval retaining saddle 28 is attached to the center of the cable head 8 as shown in FIG.
The retaining saddle 28 is provided with a through-hole 28a, and the through-hole 28a is configured to be fitted with a pin 29 that is erected vertically on the horizontal portion 25. This pin
Reference numeral 29 denotes a member for preventing the cable head 8 from rotating on the C-shaped portion 27, and is referred to as a fixing member in the present invention.

Note that the grip 21 and the arm 23 are manufactured by processing an iron plate or the like, and the wedge 22 is suspended from the grip 21 or the like using a rope (not shown) so as not to drop during work on a pole. It should be kept as follows. The arm 23 and the like are dipped in polyvinyl chloride resin on the outer surface for corrosion protection.

 The present invention is not limited to the above embodiments.

The configuration and the like of the gripping portion and the arm portion may be various shapes in which the horizontal portion is fixedly hung on the arm of the utility pole, and may be a rod shape, a plate shape, or a frame shape. However, in order to reduce the weight and facilitate the handling, the configuration of the above embodiment can be said to be optimal.

(Effect of the Invention) The above-described hanging and fixing tool for a high-voltage pull-down cable according to the present invention is firmly hung by a gripping portion on the arm of a telephone pole, and securely fixes the cable head of the high-voltage pull-down cable on a horizontal portion. As a result, there is no rolling, etc., an insulation distance can be secured, and safety is excellent. In addition, the C-shaped portion makes it easy to mount the cable head and is suitable for work at high places.

[Brief description of the drawings]

1 is a front view showing an embodiment of a tool for fixing a high-voltage pull-down cable according to the present invention, FIG. 2 is a top view of the tool of FIG. 1, and FIG. FIG. 6 ... High-pressure drop cable, 7 ... Cable head, 9 ... Lead wire, 21 ... Grip part, 23 ... Arm part, 24 ... Vertical part, 25 ... Horizontal part, 27 ... C-shaped part , 28 ... Saddle for retaining, 29 ... Fixing member.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroshi Sekino 1-1-1 Bentendori, Naka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Kanagawa branch of Tokyo Electric Power Co., Inc. (56) Reference: Jikken Sho 60-3464 (JP, Y2) ( 58) Fields surveyed (Int.Cl. ⁶ , DB name) H02G 7/00-7/22

Claims (1)

(57) [Claims] 1. An arm having a grip portion for gripping an arm of a utility pole, a vertical portion continuous with the grip portion and hanging vertically downward, and a horizontal portion extending horizontally from a lower end of the vertical portion. A C-shaped part on which a cable head is placed and an anchoring saddle fixed to the cable head are fixed on the horizontal part by inserting a high-pressure pull-down cable through the horizontal part of the arm part. A fixing tool for suspending a high-pressure pull-down cable, comprising a fixing member.