JPS6362965B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The object of the present invention is to provide a device that can safely and easily attach and detach a dragonfly arm to and from a transformer mounting pole by hot stay operation when a distribution line is in a live state. It is something.

Traditionally, when attaching dragonfly arms to transformer mounting poles on power distribution lines, the work has been done with the lines still live, unless the line is being newly installed or construction is being performed during a power outage. Such conventional work is extremely dangerous because workers work in close proximity to live parts, and the work is not easy and takes a lot of time because the work is done while wearing safety gear. There are unavoidable flaws such as spending. The present invention has been made to eliminate such defects in the conventional method by making it possible to safely attach and detach a registration arm by using a hot-stacking operation.

The gist of the present invention is to connect insulating hollow arms to the left and right from the top of an insulating hollow shaft of a hot stake, and to connect two insulating hollow arms to each other.
Insert the hanging rope of the strip, extract each rope from the tip of the hollow arm, attach a hook-shaped dragonfly arm hanging bracket to the extraction rope, and attach an L-shaped locking bracket to each dragonfly arm hanging bracket. When installed, the locking metal fitting is always opened upward, and a main line arm holding metal fitting is set on the head of the insulating hollow shaft to allow the main line arm of the distribution line to be inserted or inserted freely. A hot stay operation characterized in that a rope winding drum is provided in the lower part of the shaft to wind up or unwind the two ropes using an external handle, so that the dragonfly arm A is lifted or suspended from the main arm arm. This is a device for attaching and removing dragonfly cross arms.

The present invention will be explained with reference to the drawings. In the figure, reference numeral 1 denotes an insulating hollow shaft which is the main body of the hot stake, and insulating hollow arms 3, 3 are connected to the head 2 of the hollow shaft 1 and branch out to the left and right. As a means of connecting and branching out, support pieces 4, 4 extending in left and right directions are provided on the head 2, and the front part of the support pieces 4 is formed into a semi-cylindrical support part 5. The arms 3, 3 are fixedly connected, and two hanging ropes 6, 6 are inserted through the hollow shaft 1 and the hollow arm 3, and each hanging rope 6 is rotatably pivoted around the support piece 4 with a screw 7. Place it on the roller 8 that has been attached, insert it into the inside of each hollow arm 3, place it on the roller 9 that is rotatably fixed with a screw 7 at the tip of the hollow arm 3, and draw it out.A hook-shaped dragonfly is attached to the extraction end of the roller 9. The arm hanging fitting 10 is tied and hung. An L-shaped locking fitting 11 is rotatably attached to the lower part of this hook-shaped hanging fitting 10 with a pin shaft 12 so that the opening 13 is always held upward as shown in the second figure. opening 1
When a load shaft is applied to the shaft 3 from the outside, the lock fitting 11 rotates as shown in FIG. Such lock fittings are conventionally known.

Furthermore, in the present invention, the head 2 of the hollow shaft 1
A main line arm arm fixing fitting 14 having a shape is fixed by welding or the like so that the main line arm arm 15 can be freely inserted into or removed from the fixing fitting 14, and a tightening screw is attached to the bottom plate 16 thereof. 17 is screwed into the upper part of which is a pressure receiving plate 18 that presses the main line arm 15 upward.
will be established. The registration arm arm A is attached to the lower surface of the end of this main line arm arm 15. A rope winding drum 20 is installed in the lower part of the hollow shaft 1, which rotates when an external handle 19 is operated, and winds up or unwinds the two hanging ropes 6, 6. Rope 6 due to rotation,
Dragonfly arm hanging bracket 1 as described above by rolling up 6
By rolling up the arms 0 and 10, the dragonfly arm A is attached, and by rotating them in the opposite direction, the dragonfly arm hanging fittings 10 and 10 are rolled down.

The hollow arm 3 described above has cylinders 3', 3' with slightly larger diameters at the front and rear, and when the hollow arm 3 is made freely insertable and removable, it becomes small when the arm 3 is removed and disassembled, making it convenient for transportation. .

A case 21 is provided on the outer side of the lower part of the hollow shaft, and a lower pinion 22 and an upper large gear 23 are provided in the case and mesh with each other, and a handle 19 is attached to the rotation axis of the pinion.
The rope winding drum 20 is coupled to the rotating shaft of the large gear, and a latch is provided on the rotating shaft side of the small gear to prevent reverse rotation, and the brake release lever 24 is engaged. Alternatively, it is convenient if the lifting rope 6 is raised, lowered, and stopped by the release.

10' is a ring provided at the bottom of the hanging fitting 10;
7' is a ring provided at the bottom of the tightening screw 17;
A is the dragonfly cross arm and B is the pin insulator 25 attached to it.
is the pin axis of the pin insulator.

The present invention is constructed as described above. To attach the dragonfly arm A to the main line arm 15 using the device of the present invention, first lift the device of the present invention and fit the main line arm 15 into the main line arm fixing fitting 14 provided on the head 2 of the device. Then, the device of the present invention is fixed to the main line cross arm 15 by lifting the pressure receiving plate 18 from below using the tightening bolt 17. After that, push the brake release lever 24 at the bottom and release the ropes 6, 6 with the handle 19.
By rotating in the opposite direction, it is rolled out and the dragonfly arm hanging fittings 10, 10 on both sides are lowered down to the hand.At this point, the pin shaft 2 of the insulator B is attached to the lock fitting 11 of the hanging fitting 10.
5, the lock fitting 11 is locked and the dragonfly arm A is horizontally suspended on the device of the present invention. Then, rotate the handle 19 in the right direction and lift the dragonfly arm A by the hanging fittings 10, 10 as shown in FIG. Then, as in the past, use a separate tool to secure both arms 15 and A by tightening bolts and nuts to complete the dragonfly arm attachment. When the installation is completed, pull the ring 10' of the hanging bracket 10 to open the locking bracket 11, remove the hanging bracket 10 from the pin shaft 25 of the pin insulator, and tighten the fixing bracket 14 with the screw 1.
7 is reversely rotated to remove the device of the present invention from the main line arm 15, and the entire device is lowered to the ground to complete the work of attaching the dragonfly arm.

When removing the dragonfly arm already attached to the main line arm, first fix the device of the present invention to the main line arm 15 with the tightening screw 17 in the same way as when attaching it.
Then, fit and attach the dragonfly arm hanging fittings 10, 10 to the pin shaft 25 of the pin insulator of the dragonfly arm A through the locking metal fitting 11, and at this time, remove the fixing bolt nut using a separate tool similar to the conventional one. A is removed from the main line arm 15, and at the same time, the tightening screw 17 is loosened to separate the device of the present invention from the main line arm 15. Thereafter, the handle 19 is rotated in the opposite direction to place the entire device of the present invention together with the dragonfly arm A on the ground. The removal work is completed by lowering the hanging metal fittings from the dragonfly arms.

Since the present invention attaches or detaches the dragonfly cross arm as described above, the attaching and detaching work can be carried out extremely safely and easily without using safety equipment as in the past. I can do it. There is no danger during the work. Furthermore, since the hanging rope is stored in the hollow shaft and hollow arm, it does not interfere with the work in any way, and during work, the device of the present invention is fixed and held on the main line arm, so that the worker can support it. There is no need or effort at all.

As described above, the present invention is highly effective in attaching and detaching dragonfly arms to live distribution lines.

[Brief explanation of drawings]

Attached Figure 1 is a front view of the device for attaching and removing the dragonfly arm according to the hotstacking operation of the present invention, Figure 2 is a side view thereof, and Figure 3 is a plan view in the middle of the dragonfly arm attachment and detachment work. The figure shows its front view. A...Dragonfly arm, 1...Insulating hollow shaft, 3...Insulating hollow arm, 6...Hanging rope, 10...Dragonfly arm hanging fitting, 11...Lock metal fitting, 14...Main line arm Fixing metal fittings, 15...Main wire arms, 17...Tightening screws, 20...Rope winding drum, 24...Release lever, 25...Pin shaft of pin insulator.

Claims (1)

[Claims] 1 Connect the insulating hollow arms to the left and right from the top of the insulating hollow shaft of the hot stay. Insert two hanging ropes through the hollow shaft and the hollow arms, and pull each rope out from the tip of the hollow arm. A hook-shaped dragonfly arm hanging bracket is attached to the extraction rope, and an L-shaped locking bracket is attached to each dragonfly arm hanging bracket so that the locking bracket is always opened upward, and an insulating hollow shaft is attached to the extraction rope. At the head of the main line arm arm of the distribution line, a main line arm arm fixing fitting is installed to allow the main arm arm of the distribution line to be freely inserted or removed, and the above two hanging ropes are wound or unrolled by an external handle in the lower part of the hollow shaft. A device for attaching and removing dragonfly armrests by hot stay work, characterized in that a rope winding drum is provided so that dragonfly arm arm A is hoisted or suspended from the main arm armer.