JPH10191517A - Method and device for inspecting overhead transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an live wire self-propelled type electric wire inspection device, and an inspection method, an inspection device, and an attaching/ detaching device for mounting a power line in live wire state from an iron tower onto the inspection device. SOLUTION: A device is formed by a beam that is made of an insulation pipe, an insulation bolt, an insulation rope for rolling the beam, an insulation rope for suspending the inspection device, and a suspension hook for switching a lock lever by radio operation, thus securing insulation property. Also, the device has a pair of wheels 2 that are made of a conductor rolling on an electric wire 1, a conductive case 3 that has an electric continuity with the electric wire 1, a camera 4 that picks up the image of the electric wire 1 from the inside of the case 3, a motor 5 for driving the wheels 2, a telecontroller 6 for controlling the motor 5 and the camera 4 by radio, and a power supply 10. Electronic equipment such as the camera 4 and the telecontroller 6 is protected from an electronic wave interference by the case 3 and at the same time a weight is reduced for reducing the amount of sagging of the electric wire 1, thus securing a withstand voltage distance between the electric wires 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection method and apparatus for inspecting overhead transmission lines with live lines.

[0002]

2. Description of the Related Art Conventional inspection is a method of inspecting a power line after a power failure. There is no measure to protect the inspection device from an induction failure due to a live state, and a worker directly mounts the inspection device on the power failure line. In addition, there is no one that puts an inspection device on a live power line. Power lines and overhead ground lines installed between supports such as steel towers are variously damaged by lightning strikes and the like, and if left unchecked, a serious accident may occur. For this reason, conventionally, a video camera was mounted on a self-propelled machine capable of traveling on an overhead ground line, an image of the overhead ground line captured by the video camera was recorded on video tape, and then the video tape collected from the self-propelled aircraft To observe abnormal spots and diagnose the condition.

[0003] This conventional self-propelled electric wire inspection device has a video camera, a recording device, and a battery mounted on a frame that supports a pair of wheels that are in front of and behind the power line or an overhead ground line, respectively. . There has also been proposed a video camera that limits the recording of an image only to the vicinity of an abnormal location to enhance the efficiency of finding and diagnosing the abnormal location (see Japanese Patent Publication No. 7-114523).
In this case, a line sensor for detecting an abnormal portion and a processing device for controlling the video camera and the recording device based on the detection result of the line sensor are further mounted on the frame.

[0004]

Conventionally, an operator directly puts an inspection device on a power line in a power failure state. However, an inspection method has been proposed in which an inspection device can be mounted while the power line is in a live state. Must be provided. By the way, in these conventional self-propelled electric wire inspection devices, when a camera, a recording device, a line sensor, a processing device, and the like mounted on a frame are brought close to a live power line, an overhead ground line, or the like, so-called radio waves such as guidance are generated. These electronic devices may malfunction due to a failure.

In addition, power lines, overhead ground lines, and the like fall due to the weight of the self-propelled electric wire inspection device, and it is difficult to maintain a predetermined withstand voltage distance between the electric wires. For this reason, the inspection of power lines, overhead ground lines, and the like by the conventional self-propelled electric wire inspection device is performed in a power outage state in which power transmission is stopped, and there is a possibility that power demand may not be satisfied.

Particularly, in Japan, the summer season in which lightning strikes frequently occurs coincides with the time when the power supply-demand relationship is tight, and if inspection of the power line is refrained at this time, it may not be possible to find an abnormal part early. The object of the present invention is to
Providing a live-line type self-propelled electric wire inspection device that enables inspection of power lines and overhead ground lines while the power line is in a live state, and an inspection device attachment / detachment device that can put the inspection device on a live line from a steel tower Is to do.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a hot-line type self-propelled inspection device is attached to and detached from an electric wire in a hot-line state by an inspection device attaching / detaching device. Further, in order to achieve the above object, the present invention, as shown in FIG. 1, is supported by a pair of wheels 2 made of a conductor rolling on an electric wire 1 and suspended on the electric wire 1 via both wheels 2. In addition, a conductive case 3 that is electrically conducted, a camera 4 that images the electric wire 1 from inside the case 3, a motor 5 that drives the wheels 2, and a camera 4 that is disposed in the case 3, It includes a telecontroller 6 for wirelessly controlling the motor 5 and a power supply 10, and protects electronic devices such as the camera 4 and the telecontroller 6 from radio interference caused by a current flowing through the nearby electric wire 1 by the case 3, 2 due to the reduction in the number and the reduction in size and weight of the motor 5 derived therefrom,
Reduce the drop of the electric wire 1 when the device is placed, and
A hot-wire type self-propelled electric wire inspection device that can maintain a sufficient withstand voltage distance between them.

Further, when a self-propelled electric wire inspection device is mounted on a live line, an insulating pipe, an insulating rope, an insulating bolt, and the like are used to ensure insulation between a worker on the steel tower and the electric wire. An inspection device attaching / detaching jig made of an insulating material as described above and capable of wirelessly opening and closing the hanging hook in order to prevent the inspection device from falling off the hook when the inspection device is suspended.

[0009]

According to the present invention, a boom made of an insulating pipe is provided.
By forming a detachable device with an insulating bolt for connecting the boom, an insulating rope for raising and lowering the boom, and an insulating rope for suspending the inspection device, the worker on the tower and the electric wires can be connected. Since the insulation property can be secured between the two, the inspection device can be mounted on the electric wire in a live state.

When the inspection device is suspended by a hanging hook that can be opened and closed wirelessly, it can be prevented from dropping. When the inspection device is placed on an electric wire, the hanging hook can be opened wirelessly. Thereby, the inspection device can be separated from the hanging hook. Further, in the present invention, since the camera 4 and the telecontroller 6 are disposed in the conductive case 3 electrically connected to the electric wire 1, the camera 4 and the telecontroller 6 are protected from electric wave interference caused by a current flowing through the electric wire 1. In addition, since a pair of wheels made of a conductor rolling on the electric wire 1 is provided, compared with a conventional self-propelled electric wire inspection device provided with a pair of wheels that are rolled up and down on the electric wire before and after, respectively, The number of wheels 2 is small. Therefore, the device is small,
And it becomes lightweight. In addition, by reducing the weight of the device, the output of the motor 5 for driving the device can be reduced. As a result, the motor 5 can be reduced in size and weight, and the device can be reduced in size and weight. can do. The reduction in the weight of the device reduces the amount of drop of the electric wire 1 on which the device is mounted, and makes it possible to maintain a sufficient withstand voltage distance between the device and the electric wire 1 below the device.
That is, according to the present invention, a problem of radio interference caused by a current flowing through the electric wire 1 does not occur, and a sufficient withstand voltage distance can be maintained between the device and the electric wire 1 therebelow. It will be possible to inspect the electric wires in the state.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A live-line type self-propelled electric wire inspection device according to one embodiment of the present invention is, as shown in FIG. It comprises a monitor device B placed on a scaffold, so that the main device A can be controlled by a command given from the monitor device B.

As shown in the front view of FIG. 1, the side view of FIG. 2, and the plan view of FIG. 3, the main unit A has a pair of wheels 2 made of a conductor rolling on an electric wire 1, and both wheels 2. And a conductive case 3 electrically suspended and supported by the electric wire 1 via the cable 2. One camera 4 is provided in a main body 3 a of the case 3. The wheel 2 may be a conductor, and may be made of, for example, metal. However, in order to reduce the weight, a resin wheel in which conductive powder is mixed into urethane resin is used. The conductor powder may be metal powder, but in this embodiment, carbon powder is used to further reduce the weight.

The wheel 2 is provided with a V in which the electric wire 1 is fitted so that the wheel 2 can roll on the electric wire 1 without guidance.
The case 3 is fixed to the rear upper portion of the case main body 3a of the case 3 and is rotatable at an appropriate distance to the left and right at the front side of a metal beam 3b protruding to both left and right outer sides of the case 3. And electrically conductive with the conductive case 3.

The right wheel 2 is operatively connected to a DC motor 5 supported on the rear side of the beam 3b via a gear device 12, and the left wheel 2 is connected to the right wheel 2 via a chain synchronization device 13. It is linked and linked. A rotary encoder (counter roller) 15 is supported on the right end of the beam 3b via a bracket 14, and the position of the device is detected by rolling the rotary encoder 15 onto the electric wire 1. I have.

A photoelectric switch 17 is supported at the left end of the beam 3b via a bracket 16.
The photoelectric switch 17 can detect a damper (not shown) attached to the electric wire 1. The main body 3a of the case 3 is formed in a box shape having an open upper surface, and each ridge portion (edge portion) of the box shape is rounded to eliminate the concentration of the surface potential gradient and to prevent the occurrence of corona discharge. is there.

In the main body 3a, in addition to the camera 4,
A telecontroller 6 for wirelessly controlling the camera 4 and the motor 5, a recording device 7, a video character indicator 8 for displaying the number of pulses of the rotary encoder 15 on an imaging screen, a counter board 9, and a power supply 10 are arranged. The telecontroller 6 has a built-in video transmitter 11 for transmitting video data obtained by the camera 4 and the video character indicator 8 to a monitor station (or a station established on a work platform provided on a steel tower).

The video data processed by the video character indicator 8 is transmitted to a monitor station via a video transmitter 11, and is monitored in real time by the monitor station and, if necessary, to a recording device provided in the monitor station. Input and recorded, and at the same time the main body 3a
It is input to the recording device 7 inside and recorded. However, based on the video data obtained by the camera 4 and the video character data corresponding to the pulse number based on the output of the rotary encoder 15, the video transmitter 11 directly wirelessly transmits the video data, and the video character indicator provided in the monitor station transmits the video data. The image of the electric wire 1 and the position thereof (the number of pulses of the rotary encoder 15) may be displayed on the monitor screen by signal processing, and may be recorded in the recording device at the same time. By omitting the recording device 7 and the video character indicator 8, the main unit A can be made smaller and lighter.

The camera 4 only needs to be constructed so as to be able to take an image of the electric wire 1. Here, in order to reduce the size and weight of the device, a CCD 4 is used.
It consists of a camera. Further, the camera 4 includes an electric wire 1
Can be arranged in a plurality of directions, for example, in three directions around the electric wire 1 in order to capture images over the entire circumference. In this embodiment, however, in order to reduce the size and weight of the device, Only one mirror is provided in the case 3 facing upward, and two mirrors 18 and 19 are provided above the case 3.
Is provided so that the image of the electric wire 1 viewed from the other two directions enters the field of view of the single camera 4.

As described above, the number of wheels 2 is reduced, the motor 5 is reduced in weight, and the number of cameras 4 is reduced, whereby the weight of the apparatus is greatly reduced, and the electric wire 1 carrying the main unit A falls. Since the amount can be reduced, the distance of the electric wire 1 increases. As described above, the camera 4, the telecontroller 6 including the video transmitter 11, the recording device 7, the video character indicator 8, and the electronic device such as the counter board 9 are placed in the conductive case 3 electrically connected to the electric wire 1. By housing the devices, these electronic devices can be protected from radio interference caused by the current flowing through the electric wire 1, and these electronic devices are prevented from malfunctioning due to the radio interference.

As described above, since malfunctions due to radio wave interference of the electronic equipment can be prevented and a sufficient withstand voltage distance between the wires 1 can be ensured, the wires 1 on which the main unit A is mounted and the lower side of the device can be used. In this state, it is possible to inspect the electric wire 1 on which the main unit A is mounted in a state where a current is passed through the electric wire 1, that is, a live state. In addition, as described above, by reducing the size and weight of the main unit A, the loading and unloading of the device onto and from the electric wire 1 is facilitated, and the safety of the device is also enhanced.

By the way, the main unit A must be put on the electric wire 1 in order to inspect the electric wire 1, and must be removed from the electric wire 1 after completion of the inspection so as not to apply an unnecessary load to the electric wire 1. . In loading and unloading the apparatus on and from the electric wire 1, it is essential to prevent electric shock accidents of workers. Therefore, an attaching / detaching device 20 shown in FIG. 4 is used for loading / unloading the device on / from the electric wire 1.

The attaching / detaching device 20 is configured similarly to a device used for suspending or moving a heavy object, except for matters to be described later. Boom 23 supported so as to be able to oscillate and oscillate horizontally through the steel tower 2
1 and a hoisting winch 25 for raising and lowering the boom 23 via a raising and lowering rope 24;
A pair of left and right turning ropes 26 connected to the left and right sides of the middle part of the middle part, and a hanging hook 27 attached to the tip of the boom 23 and capable of hanging the above-mentioned main unit A and opening and closing it wirelessly; A hanging rope 28 for hanging the hanging hook 27 to the boom 23 and a hanging winch 29 for winding the hanging rope 28 are provided.

It should be noted that the boom 23, which is conventionally formed of an iron pipe, is made of fiber reinforced plastic (FR) such as epoxy resin reinforced with glass fiber.
P) and the like, and the undulating rope 24, the turning rope 26 and the hanging rope 28 are formed of an insulating material such as, for example, aramid fiber. In order to facilitate carrying-in and removal from the installation location, it is divided into a plurality of portions 23a, and is sequentially added by a joint pipe 23b to be assembled into one boom 23. Bolts connecting the joint pipe 23a and the joint pipe 23b are made of an insulating material such as epoxy resin, and the hanging hook 27
As shown in detail in FIG. 7, when the inspection device is suspended, the lock lever 27a is closed, thereby preventing the inspection device from dropping. The operation is to open the lock lever 27 a to release the inspection device from the hanging hook 27.

Thus, the boom 2 is connected to the live electric wire 1.
3. Even if the up-and-down rope 24, the turning rope 26, the hanging rope 28, etc. come into contact, the worker working on the steel tower 21 and working on the electric wire 1 is reliably insulated from the electric wire 1, and the electric shock accident is surely prevented. The effect that can be prevented is obtained. In addition, the hanging hook 27, which can be operated wirelessly, closes the lock lever 27a when the inspection device is suspended, thereby preventing the inspection device from dropping. The inspection device can be safely opened from the hanging hook 27 by operating the motor 27b wirelessly from a position away from the line and opening the lock lever 27a.

The boom 23, the undulating rope 24,
The materials such as the turning rope 26 and the hanging rope 28 are not limited to those described above, and may be any material having the necessary mechanical strength and insulation. In addition, as shown in FIGS. 8 and 9, a turning device may be attached to the base end of the boom 23 to turn the boom 23 instead of the turning rope 26.

This turning device is constituted by a worm gear, and turns the boom 23 by rotating the worm gear. In addition, a connecting fitting 23c for connecting the tip of the hoisting rope 24, the turning rope 26 or the hanging rope 28 to the boom 23, and a sheave 29 around which the hanging rope 28 is wound are disassembled and supported on the boom 23 before and after installation. It is disassembled so that it can be carried.

On the other hand, as shown in FIGS. 1 to 3, right and left sides of the conductive case 3 are viewed from the front so that the live-line type self-propelled electric wire inspection device can be lifted by the mounting device 20. A gate-shaped hanging frame 30 that straddles both sides
Is provided. The operation of placing the main unit A on the electric wire 1 to be inspected by using the mounting jig 20 is performed as follows.

That is, first, after attaching the universal joint 22 to an appropriate height of the steel tower 21, the hoisting winch 25 is operated to support the boom 23 at a position close to vertical. Thereafter, the hanging rope 28 is paid out from the hanging winch 29, and the hanging hook 27 is lowered on the steel tower near the person holding the live-type self-propelled electric wire inspection device. Further, thereafter, after the hanging hook 27 is hooked on the hanging frame 30 of the live-line type self-propelled electric wire inspection device held on the steel tower, the lock lever 27a is closed and the tip of the boom 23 is moved from the wire position to be inspected. Is also supported at a position that is raised by an appropriate height. Next, the suspension rope 28 is wound up by the suspension winch 29, and is lifted to a position higher than the highest electric wire 1 among the electric wires 1 to be inspected by the wheels 2 of the live-line type self-propelled electric wire inspection device. Then, the swing rope 26 is manually operated to position the wheel 2 directly above the electric wire 1, and then the hanging rope 28 is extended from the suspending winch 29 to put the wheel 2 on the electric wire 1, and the monitor The hook is detached from the suspension frame 30 by rotating the motor 27b by radio operation from the office, opening the lock lever 27a, and further extending the suspension rope 28.

Thereafter, the main unit A is driven on the electric wire 1 by radio control from the monitor station, and video data from the camera 4 and position data from the rotary encoder 14 are received by the monitor station, and the monitor 1 inspects the electric wire 1. At the same time, these data are recorded on the recording device. When the photoelectric switch 16 detects the damper to which the electric wire 1 is attached, the hot-wire type self-propelled electric wire inspection device is stopped and starts traveling in the opposite direction. This reverse running may be started automatically or may be started based on a command given from a monitor station.

When the main unit A returns to the position where the main unit A is put on the electric wire 1, the reverse running of the main unit A is stopped automatically or in accordance with a command from the monitor station. Be lifted. In other words, the horizontal position of the boom 23 is manually operated with the turning rope 26 to adjust the hanging hook 27 with the lock lever 27a opened to the position where the hanging hook 27 is hooked on the hanging frame 30.
At 9, the hanging rope 28 is wound up, and the hook is suspended from the hanging frame 30.
, And the lock lever 27a is closed by wireless operation.
By winding the wheel 8, the wheel 2 is completely lifted from the electric wire 1.

Thereafter, when inspecting another electric wire 1 having the same height, the horizontal position of the boom 23 is manually operated with the turning rope 26 so that the wheel 2 is positioned directly above the other electric wire 1. Then, the main unit A is mounted on the other electric wire 1 by moving the main unit A horizontally and then pulling out the hanging rope 28 from the winch 29 for hanging. Also,
When inspecting one electric wire 1 and then inspecting another electric wire 1 with a different height, it is necessary to support the end of the boom at a position higher than the electric wire to be inspected by an appropriate height, and then Then, the horizontal position of the boom 23 is manually operated by the turning rope 26 so that the main unit A can be moved up and down without hitting the electric wire 1, and then the suspending winch 29 is operated to move the main unit A. Next, the wheel 2 is raised and lowered to a position where the wheel 2 is higher than the electric wire 1 to be inspected, and thereafter, if necessary,
The swing rope 26 is operated by hand to position the horizontal position of the boom 23 so that the wheel 2 of the main unit A is positioned directly above the electric wire 1 to be inspected next, and then the suspension rope is suspended from the suspension winch 29. 28 and the wheel 2 is connected to the electric wire 1
Put on.

The above procedure is repeated as necessary to complete the inspection of the plurality of electric wires 1, and when the main unit A is returned to the position where it is placed on the last electric wire 1, the main unit A is removed from the electric wire 1. After raising the boom tip almost vertically, the hanging rope 28 is extended from the hanging winch 29, and the lock lever 27a of the hanging hook 27 is wirelessly connected.
Is opened, and the suspension frame 30 of the main unit is hung from the hook on the steel tower.

When the live-line type self-propelled electric wire inspection device is suspended only by the wheel 2 which is in contact with the upper side of the electric wire 1 as described above, the wheel 2 is derailed when the electric wire 1 vibrates up and down for some reason. There is a risk. In this embodiment, in order to solve this problem, the suspension frame 30 is supported by the conductive case 3 so as to be able to move up and down within a certain range,
A fall prevention fitting 31 that opens and closes the lower part of the electric wire 1 in conjunction with the lifting and lowering of the suspension frame 30 is supported by the case 3, and furthermore,
A spring 32 for urging the fall prevention fitting 31 to the closed position via the suspension frame 30 is attached to the suspension frame 30 and the case 3.

According to this, as shown in FIG. 5, in the initial state, the suspension frame 30 is pulled by the spring 32 and located at the lower limit position, and the fall prevention fitting 31 is located at the closed position.
When the suspension frame 30 is lifted from this initial state to its upper limit position, as shown by a broken line in FIG.
1 opens 90 degrees, so that the electric wire 1 can freely enter and exit below the wheel 2. After the wheel 2 is lowered onto the electric wire 1, the suspension frame 30 is urged by the spring 32 and descends as the hook is lowered, and returns to the initial state as shown by the solid line in FIG. The fitting 31 closes,
After the wheel 2 is put on the electric wire 1, the wheel 2 is prevented from being lifted off from the electric wire 1 and derailed. When the main unit A is lifted from the electric wire 1, first, the suspension frame 30 is lifted to open the fall prevention fitting 31, and the electric wire 1 can freely enter and exit below the wheel 2. The entire device is lifted, and the wheel 2 rises from the electric wire 1. That is, with the configuration described above, the derailment of the wheel 2 from the electric wire 1 can be reliably prevented with a simple configuration.

Incidentally, as shown in FIG.
And a pair of right and left rods 30b, which are welded to the main frame 30a on which the hook is hooked and the left and right legs thereof and are guided up and down by guide portions 3c provided on the conductive case 3, and spring receiving pins 30c provided at the lower end thereof. The fall prevention fitting 31
Is rotatably supported by the case 3 via a fulcrum pin 31a. Further, the case 3 is provided with a spring locking pin 3d with which the lower end of the spring 32 is engaged below the rod 30b of the suspension frame 30. The lifting limit of the suspension frame 30 is determined by the tension of the spring 32 and the body. The position where the weight of the suspension frame 30 other than the suspension frame 30 of the device A is balanced is set, and the lowering limit of the suspension frame 30 is a position where the main frame 30 a is received on the upper surface of the main body 3 a of the case 3.

[0036]

As described above, the inspection device attaching / detaching device of the present invention comprises a boom made of an insulating pipe, an insulating bolt for connecting the boom, and an insulating bolt for raising and lowering the boom. Insulation between live wires and workers on steel towers by forming a conductive rope, an insulating rope for suspending the inspection device, and a hanging hook that can open and close the lock lever by wireless operation As a result, it is possible to obtain an effect that the inspection device can be mounted on the electric wire in a live state.

In addition, the live-line type self-propelled electric wire inspection device of the present invention has a pair of wheels made of a conductor rolling on the electric wire, and is suspended and supported on the electric wire via both wheels. A conductive case that is electrically conductive, a camera that captures an electric wire from inside the case, a motor that drives the wheels, a telecontroller that is arranged in the case, and wirelessly controls the motor and the camera, and a power supply. Therefore, it is possible to prevent malfunction of the electronic device of the device due to radio interference caused by current flowing through the wire, and to reduce the size of the device,
Lightweight to reduce wire drop due to concentrated load,
The withstand voltage distance between the wires can be sufficiently ensured, and as a result, the effect that the electric wire can be inspected while being in a live state can be obtained.

In the present invention, especially when a video transmitter for wirelessly transmitting video data obtained by the camera is provided, the video data can be received and monitored on the ground at the same time as the device runs on the electric wire. Thus, the effect that the electric wire can be inspected in real time can be obtained. Also, in this case, the video character indicator and the recording device on the device are omitted, the device is made smaller and lighter, the drop of the wire due to the concentrated load is further reduced, and the withstand voltage distance between the wires is reduced. Is obtained more reliably.

Further, in the present invention, in particular, when a mirror for reflecting an image of the electric wire on the side opposite to the camera in the field of view of the camera is provided, inspection of the electric wire from a plurality of directions can be performed by one camera. Therefore, the device can be made smaller and lighter, and the drop of the electric wire due to the concentrated load can be further reduced and the withstand voltage distance between the wires can be more reliably secured.

Further, in the present invention, in particular, a suspension frame which can be raised and lowered within a predetermined range with respect to the conductive case, and a fall prevention bracket which opens and closes a lower part of the electric wire in conjunction with the lifting and lowering of the suspension frame. A spring that urges the fall prevention fitting to the closed position via the suspension frame, with a simple configuration, automatically opens the fall prevention fitting when lifting the device through the suspension frame, and The electric wire can be freely put in and taken out below, and the effect of putting the wheel on the electric wire and simultaneously closing the lower part of the electric wire with the fall prevention fitting to prevent the wheel from being detached from the electric wire can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a main body device of the present invention.

FIG. 2 is a plan view of the main body device of the present invention.

FIG. 3 is a side view of the main body device of the present invention.

FIG. 4 is a side view of an attaching / detaching device used for loading / unloading the main unit of the present invention onto / from an electric wire.

FIG. 5 is an operation explanatory view of the fall prevention fitting of the present invention.

FIG. 6 is a schematic configuration diagram of the present invention.

FIG. 7 is a three side view of the hanging hook according to the present invention.

FIG. 8 is a side view showing a mounted state of the turning device according to the present invention.

FIG. 9 is a three-view drawing of the worm gear type turning device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electric wire 2 ... Wheel 3 ... Case 4 ... Camera 5 ... Motor 6 ... Telecontroller 10 ... Power supply 11 ... Video transmitter 18/19 ... Mirror 30 ... Hanging frame 31 ... Fall prevention fitting 32 ... Spring

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Sakuta, 2-9-18 Honjohigashi, Kita-ku, Osaka-shi Kanden Kogyo Co., Ltd. (72) Kazuo Yamagata 2-9-1, Honjohigashi, Kita-ku, Osaka-shi No. Kanden Kogyo Co., Ltd.

Claims (5)

[Claims] 1. A live-line type self-propelled inspection device having a photographing camera, a photographed image transmission device, and a wireless control device housed in a conductive case, and having conductive wheels, is constituted by an insulating pipe and an insulating rope. An inspection method in which an overhead transmission line that is detachable from a pylon with a hot-line electric wire installed between pylons is inspected by a live line using an inspection equipment attaching / detaching apparatus. 2. A pair of wheels comprising a conductor rolling on an electric wire, a conductive case suspended from and supported by the electric wire via both wheels, and electrically connected to the electric wire; A live-line type self-propelled electric wire, comprising: a camera for imaging an electric wire from a motor; a motor for driving the wheels; a telecontroller disposed in the case, for wirelessly controlling the motor and the camera; and a power supply. Inspection device. 3. A video transmitter arranged in the case and wirelessly controlled by the telecontroller to wirelessly transmit video data obtained by the camera.
Live-line type self-propelled electric wire inspection device according to 1. 4. A suspension frame which is supported so as to be able to ascend and descend within a predetermined range with respect to a conductive case, a fall prevention bracket which opens and closes a lower part of an electric wire in conjunction with the elevation of the suspension frame, and The live-line type self-propelled electric wire inspection device according to any one of claims 1 to 3, further comprising: a spring for urging the fall prevention metal fitting to the closed position through the spring. 5. An insulated pipe for securing insulation between a worker on a tower and electric wires when the live-line type self-propelled electric wire inspection device is attached to and detached from a tower in a live state. Inspection device attachment / detachment device made of insulating material of insulating rope and equipped with a wireless openable / closable hook.