JPS6141370Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a dragonfly arm lifting device used for attaching a dragonfly arm to a high-pressure arm during hot-stay live wire work.

Prior Art When attaching a dragonfly arm to a high-voltage arm that supports live overhead power lines, it is first necessary to carry the dragonfly arm to the high-voltage arm. Conventionally, when lifting a dragonfly arm, a worker carries the dragonfly arm on his back and climbs up to the high-voltage arm, but it is dangerous for workers to approach live overhead power lines, so It was necessary to carry out preliminary work to relocate the power lines to a safe area above the high-voltage arms.

This preliminary work will be explained with reference to FIGS. 1 and 2. The work is carried out in the following steps.

(1) Attach the wire holders 7 at the same spacing as the high-voltage wires on the auxiliary arm 6.

(2) Separate the low-voltage line from utility pole 8.

(3) Multiple wire tongue saddles 9 on utility pole 8
and attach the rope block saddle 10.

(4) The vertical main wire tong 11 is pulled up to the upper side of the utility pole 8 and attached to the wire tong saddle 9 so that it can be raised and lowered.

(5) Pull up the auxiliary arm 6 to the top of the utility pole 8, and attach the middle part of the auxiliary arm 6 to the main wire.
Attach to the upper end of the tongs 11.

(6) Pull up the auxiliary wire tong 12 to the top of the utility pole 8 and connect the upper end of the auxiliary arm tong 12 to the end of the auxiliary wire tong 6.

(7) Fix the lower end of the auxiliary wire tongs 12 to the lower part of the main wire tongs 11.

(8) Connect one end of the rope 14 wound around the pulley 13 fixed to the rope block saddle 10 to the lower end of the main wire tong 11.

(9) Untie the binding wire of high voltage insulator 15. Also, remove the high-voltage insulator bolts if necessary.

(10) By pulling the other side of the rope 14, pull up the main wire tongs 11 and the auxiliary arm 6, etc., and use the wire holder 7 attached to the auxiliary arm 6 to remove the main wire 16, which is in a live wire state. After pushing up the main wire tongs 11 to a safe range, the main wire tongs 11 are fixed to the wire tong holder 9 so as not to fall.

Problems to be Solved by the Invention However, in the conventional case, the worker has to climb up to the high-pressure arm carrying the dragonfly arm on his back, which causes great fatigue to the worker, and also prevents the worker from making mistakes. There is a risk of falling, and the complicated preliminary work described above must be carried out, and the live overhead power lines, which have been relocated to a safe area above the high-voltage arms, may fall due to vibrations during an earthquake or other unforeseen causes. There is a fear.

Purpose and structure of the invention The purpose of this invention is to provide a dragonfly arm lifting device that can advantageously solve the above-mentioned problems. An arm clamp 2 is attached to the temporary arm 1, pulleys 3 are attached to both ends of the temporary arm 1, and a dragonfly arm clamp 5 is connected to one end of a rope 4 wrapped around each pulley 3. A dragonfly arm lifting device is characterized by the following.

Embodiments Next, this invention will be explained in detail using illustrated examples.

Figures 3 to 5 show a dragonfly arm lifting device according to an embodiment of the invention, in which a roughly U-shaped rod is installed in the middle of a rod-shaped temporary arm 1 made of an electrically insulating material. A lower arm of the clamp body 18 is fixed with a screw or the like, and a vertical bolt 21 having an engagement hole 20 at the lower end is screwed into a female screw member 19 fixed to the lower arm.
A tightening washer 22 is rotatably attached to the upper end, and includes the clamp body 18, the female thread member 19, the tightening washer 22, and a bolt 21 having an engagement hole 20.
The cross arm clamp 2 is constituted by the above.

The lower ends of brackets 23 are fitted to both ends of the temporary arm 1 and fixed with screws, etc., and a pulley 3 and a rope stopper 24 are attached to the upper end of each bracket 23. An upper arm of a U-shaped clamp body 25 is connected to one end of the rope 4 wound around the clamp body 25, and a female screw member 26 fixed to the lower arm of the clamp body 25 has an engagement hole 27 at its lower part. A bolt 28 is screwed together, and the dragonfly arm clamp 5 is constituted by the clamp body 25 and the bolt 28. The other end portion of each rope 4 is wound around a double-barrel type winder 29.

When installing a dragonfly arm using the dragonfly arm lifting device of the above embodiment, first grasp the temporary arm 1 on the ground using a known grip clamp stay, and then lift it up. The intermediate clamp main body 18 is engaged with the high-pressure arm 17, and then the bolt 21 is rotated in the tightening direction by the stake on the ground, the high-pressure arm 17 is gripped by the arm clamp 2, and the temporary arm 1 is The intermediate portion is fixed to the high-pressure armrest 17.

Next, a dragonfly arm 30 with multiple insulators attached in advance.
Both ends of the ropes 4 are gripped by dragonfly arm clamps 5 connected to one end of each rope 4, and then the other end of each rope 4 is manually pulled by a worker on the ground, or a double-barrel type By winding it up with the winder 29, the dragonfly arm 30 is lifted up to a position where it contacts the lower surface of the high-pressure arm 17, and then the bolts and nuts are tightened with the stay.
The dragonfly arm 30 is fixed to the high-pressure arm 17.

After completing the installation work of the registration arm arm 30, tighten the bolt 2 of the registration arm arm clamp 5 using the stay.
8 to loosen it, remove the registration arm arm clamp 5 from the registration arm arm 30, then rotate and loosen the bolt 21 of the arm arm clamp 2 using the stay, and then temporarily tighten the bolt 21 using the grip clamp stay. Grasp arm 1 and lower it to the ground.

When implementing this invention, as shown in FIG. 6, if an attachment 31 is detachably provided with a screw on the intermediate arm of the clamp body 18 of the arm clamp 2, by attaching and detaching the attachment 18, High pressure arms 17 with different cross sections
It can also be used for attachment to A and 17B.

Effects of the invention According to this invention, the temporary arm 1 equipped with the arm clamp 2 and the pulley 3 is lifted on the ground by a grip clamp stay or the like, and the high-pressure arm 17 of the clamp body 18 of the arm clamp 2 is
The temporary arm 1 can be easily and quickly fixed to the high-pressure arm 17 by ground operation by engaging with the arm clamp 2 and then tightening the arm clamp 2 with the stay. The dragonfly arm clamp 5 is connected to one end of the rope 4 hanging from the dragonfly arm 3.
0, and then pull the other end of each rope 4 on the ground.
can be easily and quickly lifted to the lower mounting position of the high-pressure arm 17. Therefore, the dragonfly arm can be lifted to the position of the high-pressure arm in a safe state, and the fatigue caused to the worker can be reduced. Furthermore, there are advantages such as not requiring the complicated preliminary work of relocating live overhead wires to a safe area as in the prior art.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional main line lifting device in an activated state, and FIG. 2 is a side view showing a portion thereof. Fig. 3 is a partially cutaway front view showing a dragonfly arm lifting device according to an embodiment of this invention, Fig. 4 is a vertical side view thereof, and Fig. 5 is a sectional view taken along line A-A in Fig. 3. . FIG. 6 is a front view showing a state in which the attachment is attached to the arm clamp. In the figure, 1 is a temporary arm, 2 is a cross arm clamp, 3 is a pulley, 4 is a rope, 5 is a dragonfly arm clamp, 16 is a main wire in a live wire state, 18 is a clamp body, 19 is a female screw member, and 20 is a female screw member. Engagement hole, 21
is a bolt, 22 is a tightening washer, 23 is a bracket,
Reference numeral 24 indicates a rope retaining member, 25 a clamp body, 26 a female screw member, 27 an engagement hole, 28 a bolt, 29 a winder, and 30 a dragonfly arm.

Claims (1)

[Scope of utility model registration request] An arm clamp 2 is attached to the middle part of the temporary arm 1, a pulley 3 is attached to each end of the temporary arm 1, and a dragonfly arm clamp is attached to one end of a rope 4 wrapped around each pulley 3. 5
A dragonfly arm lifting device characterized in that: are connected to each other.