JP7044362B2 - High-altitude mounting device for electrical equipment - Google Patents

Description

The present invention relates to a high-altitude mounting device for an electric device used for installing an electric device such as a high-voltage air switch (PAS) at a high place such as the upper part of a utility pole.

The height of the utility pole is about 10m to 12m, and the work of installing electrical equipment on the top of the utility pole is dangerous. In particular, since the high-voltage air switch (PAS) weighs about 60 kg, it is very difficult to manually carry it up to the upper part of the utility pole and install it.
Normally, an aerial work platform is used to install electrical equipment on the top of utility poles.
However, there are many places where aerial work platforms cannot enter and places where aerial work platforms cannot be installed stably, and in such places all installation work had to be done manually.

Therefore, the inventor of the present invention first has a winch attached to the lower part of the electric pole, a lifting device attached to the upper part of the electric pole and having a lifting pulley, an arm support device attached to the upper part of the electric pole, and an arm support device. The arm support device is equipped with a movable arm device having an upper pulley and a wire connecting the upper part of the electric pole and the ground via the lifting pulley of the lifting device or the upper pulley of the movable arm device, and the upper surface of the arm support device is open. The movable arm device has a support cylinder that is rotatably inserted into the support cylinder with the central axis as the center of rotation, and an arm that projects laterally from the support cylinder. A pulley is provided, and the wire is hung on the lifting pulley and wound up by a winch, so that the arm support device and the movable arm device are lifted from the ground to the upper part of the electric pole, and the wire is hung on the upper pulley and wound up by the winch. Proposed a high-altitude mounting device for electrical equipment to be lifted from the top of the electric pole (see Patent Document 1).
By using this device, heavy electric equipment can be safely and easily installed on the upper part of the utility pole with a small number of workers without using an aerial work platform.

Japanese Patent No. 5822220

However, since the above-mentioned conventional high-altitude mounting device for electrical equipment has a large number of parts and is heavy in weight, it takes a relatively long time to mount and remove, and it cannot be said that the price reduction is sufficient.
The problem to be solved by the present invention is that heavy electric equipment can be safely and easily installed on the upper part of a utility pole with a small number of workers without using an aerial work platform, and the number of parts is small and the cost is low. The purpose is to provide a high-altitude mounting device for electrical equipment that is inexpensive, lightweight, and easy to handle.

The present invention relates to a high-altitude mounting device for an electric device used for installing an electric device on an electric column, and includes a plurality of column fixing brackets, a column, an arm, a winch, and a wire, and the plurality of columns. The fixing bracket has a strut mounting portion that is detachably attached to the upper part of the electric pole at intervals in the vertical direction and is arranged side by side in the vertical direction at the time of mounting, and the strut is of the plurality of strut fixing brackets. The arm is rotatably and fixedly inserted into the support column mounting portion with the central axis as the center of rotation, the arm projects laterally from the support column, a pulley is provided at the tip portion, and the winch is attached to the middle portion of the arm. The wire connects the upper part of the electric pole and the ground via the winch and the pulley, and by winding the wire with the winch, the electric device connected to the wire can be lifted from the ground to the upper part of the electric pole. be.

The strut mounting portion of the strut fixing bracket located at the bottom is a support tube that opens upward, and the strut mounting portion of the other strut fixing brackets is arranged above the support cylinder and opens in the vertical direction. The strut is inserted into the support tube and the support cylinder, an inverted conical bearing recess is formed in the center of the bottom surface of the support cylinder, and an inverted conical rotation shaft is provided in the center of the bottom surface of the strut. The rotating shaft may be rotatably engaged with the bearing recess.
It is desirable that the length of the arm can be adjusted.
In this case, the arm includes an outer pipe protruding from the support column and an inner pipe that is slidably and fixedly fitted to the inside from the tip surface of the outer pipe, and the pulley is the tip portion of the small diameter pipe. It may be attached to the large diameter pipe and the winch may be attached to the large diameter pipe.

According to the present invention, a small number of lightweight and small parts can be installed on the upper part of a utility pole, and a heavy electric device can be lifted by using a winch. It can be safely and easily installed on the top of a utility pole.
In addition, since the number of parts and the weight of parts are small, the price is low and the labor required for installation and removal can be reduced.
Further, since the support column fixing bracket for supporting the support column is divided into a plurality of parts, various devices installed on the utility pole can be avoided and attached, and sufficient support strength can be obtained.
The pulley that supports the wire connecting the electrical equipment can be adjusted in position according to the overhanging direction of the arm to which the electrical equipment is attached by rotating the support.
Since the worker at the top of the utility pole installs the electrical equipment and operates the winch, there is no need to keep in touch with the top of the utility pole on the ground, and the winch can be easily adjusted.

According to the second aspect of the present invention, the movable arm device rotates smoothly and stably.
According to the inventions according to claims 3 and 4, it is easy to install the electric device on the arm metal having different lengths protruding from the utility pole.

It is a side view in the 1st stage of the electric equipment installation process of the electric pole which concerns on embodiment of this invention. It is a side view in the 2nd stage of the electric equipment installation process of the electric pole which concerns on embodiment of this invention. It is a side view in the 3rd stage of the electric equipment installation process of the electric pole which concerns on embodiment of this invention. It is a side view in the 4th stage of the electric equipment installation process of the electric pole which concerns on embodiment of this invention. It is a side view of the support column fixing metal fitting which concerns on embodiment of this invention. It is a top view of the support column fixing metal fittings located at the bottom which concerns on embodiment of this invention. It is sectional drawing of the support cylinder which concerns on embodiment of this invention. It is a side view of the support column and arm which concerns on embodiment of this invention. It is a side view in which a part of the support column, arm and support column fixing metal fitting according to the embodiment of the present invention is broken.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 4, this embodiment relates to a high-altitude mounting device used for installing an electric device including a high-voltage aerial switch C on an arm B provided so as to extend horizontally on the upper part of a utility pole A. As shown in FIG. 3, a plurality of (three in this embodiment) support pole fixing brackets 1, a support 2, an arm 3, a winch 4, and a wire 5 are provided.

The strut fixing bracket 1 has a different structure between the strut fixing bracket 1a located at the bottom and the other strut fixing brackets 1b, and the tightening band 6 for attaching to the utility pole A and the tightening band 6 laterally, respectively. It includes an extending bracket 7 and a support pole mounting portion provided at the tip of the bracket 7.
As shown in FIGS. 5 and 6, the tightening band 6 is formed by connecting a pair of semicircular bands 9 so as to be openable and closable, and tightening by tightening the tightening screws 10 screwed into both ends of the semicircular band 9. The diameter of the band 6 can be reduced.
Further, the bracket 7 extends laterally from the central portion of the outer peripheral surface of one of the semicircular bands 9.

The strut mounting portion of the strut fixing bracket 1a located at the bottom is a support cylinder 8a having a circular cross section opened upward, and the strut mounting portion of the other strut fixing bracket 1b is a support tube having a circular cross section opened in the vertical direction. 8b.
The support cylinder 8a and the support tube 8b have the same height and diameter, and an inverted conical bearing recess 11 is formed in the center of the bottom surface of the support cylinder 8a (FIG. 7). Further, fixing screws 12 are screwed inward from the outer peripheral side to the inner side of the support cylinder 8a and the support tube 8b.
Then, as shown in FIG. 1, a pair of semicircular bands 9a are fitted around the outer circumference of the utility pole A, and the tightening screw 10 is tightened so that the tightening band 6 is wound around the upper outer circumference of the utility pole A to form a plurality of columns. The fixing bracket 1 is attached to the utility pole A at a vertical interval.
At this time, the support cylinder 8a and the support tube 8b of the support column fixing bracket 1 are arranged side by side in the vertical direction.

The support column 2 is made of a circular pipe having a length of 1200 mm to 1400 mm and having an outer diameter slightly smaller than the inner diameter of the support cylinder 8a and the support pipe 8b, and rotates around the support cylinder 8a and the support pipe 8b with the central axis as the center of rotation. -It is inserted so that it can be fixed (Figs. 2 to 4).
Further, an inverted conical rotary shaft 13 is provided at the center of the bottom surface of the column 2, and the rotary shaft 13 is rotatably engaged with the bearing recess 11 of the support cylinder 8a (FIG. 9).
By engaging the rotating shaft 13 of the support column 2 with the bearing recess 11 of the support cylinder 8a in this way, the support column 2 does not receive a large resistance in the support cylinder 8a and the support tube 8b, and is smooth without rattling. The support column 2 is fixed by rotating to and screwing the fixing screw 12.

As shown in FIG. 8, the arm 3 includes an outer pipe 14 projecting laterally from the upper end of the support column 2 and an inner pipe 15 slidably and fixedly fitted inward from the tip surface of the outer pipe 14. The length can be adjusted in the range of 650 mm to 850 mm by sliding the inner pipe 15. The joint corner portion between the support column 2 and the outer pipe 14 is reinforced by the corner reinforcing plate 16.
A pulley 17 is rotatably installed on the upper surface of the tip of the inner pipe 15, a winch 4 is attached to the upper surface of the outer pipe 14, and a wire 5 wound around a drum of the winch 4 hangs down through the outer circumference of the pulley 17. There is.
That is, the wire 5 connects the upper part of the utility pole A and the ground via the winch 4 and the pulley 17, and the wire 5 can be wound and rewound by manually turning the handle connected to the drum of the winch 4. can.
A lifting metal fitting 18 for hanging a rope when pulling the pole 2 and the arm 3 onto the utility pole A is provided on the upper surface of the base end portion of the outer pipe 14.

The procedure for installing the high-voltage air switch C on the arm B of the utility pole A will be described below using this high-voltage mounting device.
First, as shown in FIG. 1, a worker who has climbed the utility pole A attaches a plurality of column fixing brackets 1 to the upper part of the utility pole A at intervals in the vertical direction. At this time, the tightening band 6 of the pole fixing bracket 1 is attached while avoiding various devices such as wiring brackets installed on the utility pole A. Further, the support cylinders 8a and the support pipes 8b of the plurality of column fixing brackets 1 are arranged so as to be aligned in a vertical direction.
Next, a rope is hung on the lifting metal fitting 18, and the support pole 2 and the arm 3 are lifted on the utility pole A.

Next, as shown in FIG. 2, the support column 2 is inserted into the support cylinder 8a and the support tube 8b of the support column fixing bracket 1 from above, and the rotating shaft 13 of the support column 2 is engaged with the bearing recess 11 of the support cylinder 8a.
Further, the length of the arm 3 is adjusted according to the position where the high-voltage air switch C of the arm metal B is attached, the overhanging direction of the arm metal B and the overhanging direction of the arm 3 are aligned, and the fixing screw 12 is screwed in. Fix the support column 2.
Next, the wire 5 is rewound, the high-voltage air switch C is connected to the tip of the wire 5 on the ground, and as shown in FIG. 3, the wire 5 is wound up using the winch 4, and the high-voltage air switch C is installed. lift.
Then, as shown in FIG. 4, a high-voltage air switch C suspended above the utility pole A is attached to the arm B.

At this time, since the installation of the high-voltage air switch C and the operation of the winch 4 are both performed on the utility pole A, the installation position of the high-voltage air switch C is performed without contacting the top of the utility pole A and the ground. The winding position by the winch 4 can be finely adjusted according to the above.
When the installation of the high-voltage air switch C is completed, the support column 2 is pulled out from the support cylinder 8a and the support tube 8b, the support column 2 and the arm 3 are lowered to the ground, and then the support column fixing bracket 1 is removed from the utility pole A and lowered.

The specific structure of the high-altitude mounting device of the present invention is not limited to the above embodiment.
For example, the tightening band for attaching the support column fixing bracket to the utility pole may be one that tightens the circumference of the utility pole so as not to loosen.
Further, the number of support column fixing brackets can be appropriately changed depending on the type and weight of the electric device.
In addition, when hoisting the poles and arms with ropes, another pulley may be attached to hang the ropes on the utility poles.

A Utility pole B Arm C High voltage air switch (PAS)
1 Strut fixing bracket 2 Strut 3 Arm 4 Winch 5 Wire 6 Tightening band 7 Bracket 8a Support cylinder 8b Support pipe 9 Semicircular band 10 Tightening screw 11 Bearing recess 12 Fixing screw 13 Rotating shaft 14 Outer pipe 15 Inner pipe 16 Corner reinforcing plate 17 Pulley 18 Lifting bracket

Claims (4)

It is a high-altitude mounting device for electrical equipment used to install electrical equipment on the top of utility poles, and is equipped with a plurality of column fixing brackets, columns, arms, winches, and wires.
The plurality of column fixing brackets have a column mounting portion that is detachably attached to the upper part of the utility pole at intervals in the vertical direction and is arranged side by side in the vertical direction at the time of mounting.
The strut is rotatably and fixedly inserted into the strut mounting portions of the plurality of strut fixing brackets with the central axis as the center of rotation.
The arm projects laterally from the support column, and a pulley is provided at the tip thereof.
The winch is attached to the middle of the arm and
The wire connects the upper part of the utility pole and the ground via the winch and the pulley.
A high-altitude mounting device for an electric device, wherein the electric device connected to the wire can be lifted from the ground to the upper part of a utility pole by winding the wire with the winch. The strut mounting portion of the strut fixing bracket located at the bottom is a support tube that opens upward, and the strut mounting portion of the other strut fixing brackets is a support tube that is arranged above the support cylinder and opens in the vertical direction. The column is inserted into the support tube and the support cylinder, an inverted conical bearing recess is formed in the center of the bottom surface of the support tube, and an inverted conical rotation shaft is provided in the center of the bottom surface of the column. The high-altitude mounting device for an electric device according to claim 1, wherein the rotating shaft is rotatably engaged with the bearing recess. The high-altitude mounting device for electrical equipment according to claim 1 or 2, wherein the arm is adjustable in length. The arm includes an outer pipe protruding from the support column and an inner pipe that is slidably and fixedly fitted to the inside from the tip surface of the outer pipe, and the pulley is provided at the tip of the inner pipe. The high-altitude mounting device for electrical equipment according to claim 3, wherein the winch is mounted on the outer pipe.

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