JP2000335286A - Grounding device with electroscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability without sacrificing working safety enabling checking of a result from an electroscope to confirm completion of grounding by providing an electroscope connected with a tip metal fitting and operating rod for detecting whether a feeder cable is applied with pressure or not and a grounding confirmation portion for confirming completion of grounding of a grounding line to be connected to a joint. SOLUTION: This grounding device comprises a tip metal fitting 2 formed into a hook for easily catching a feeder cable 1, a long operating rod 3 extending from the base end, and an electroscope 4 electrically connected to detect whether the feeder cable 1 is applied with pressure or not. The grounding device further comprises a grounding confirmation portion 8 connected electrically with the tip metal fitting 2 and with a joint 7 connecting a ground line 5 through engaging a joint 6 mounted at the tip of the ground line 5 for confirming that the ground line 5 is grounded. Furthermore, the grounding device comprises a grounding line hoisting portion 9 mounted at the base end part of the operating rod 3 for hoisting the ground line 5 up to the joint 7 and an alarm 10 for alarming a result from the electroscope and completion of grounding. This configuration makes it possible to confirm the result from the electroscope and completion of grounding reliably at hand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding device with a voltage detector used for power detection / grounding work in power work.

[0002]

2. Description of the Related Art In the maintenance and construction of electric power facilities, electric power detection and
The grounding work is an important work to protect the lives of power staff and workers engaged in the power work, and is a basic work.

In power work, feeder lines (trolley lines) are stopped.
To confirm that the feeder line is out of service.
After the power detection, the grounding work
Work to prevent electric shock accidents, etc.
Like that. Then, at that time,
If you use a voltage detector and perform grounding work,
It was common to use. Also, for DC train lines
Grounding work is 100mm ^TwoGround wire to ground wire
They are hooked and grounded.

[0004]

In the conventional power work, although the power detection and grounding work is performed frequently,
Since the power detector used for the power detection work and the grounding device used for the grounding work were separate devices, there was a risk that the ground would be erroneously grounded to the pressurizing wire, which was very dangerous.

[0005] In addition, since a ground wire as thick as 100 mm ² was lifted from the ground, hooked to a feeder wire, and grounded,
It took a considerable amount of work to lift the ground wire from the ground and hook it on the electric wire, and the workability was very poor.

Further, since the LED lamp and the buzzer for notifying the result of the voltage detection are attached to the main body of the voltage detector, the LED lamp and the buzzer are located at a position away from the ground. In places with many noises, it was difficult to hear the sound of the buzzer, and it was difficult to check the results of power detection in bright places or places with a lot of noise.

Therefore, the present invention has been proposed in view of the above-mentioned problems, and an object thereof is to improve workability without impairing work safety, and furthermore, in a bright place or in a lot of noise. It is an object of the present invention to provide a grounding device with a voltage detector which can surely confirm the result of voltage detection and the completion of grounding even in work at a place.

[0008]

As a means for achieving the above-mentioned object, the present invention provides a tip fitting made of a conductor formed into a hook shape and easily hooked on an electric wire, and a length extending from a base end of the tip fitting. Operating rod, and a tip of the operating rod, which is electrically connected to and attached to the tip fitting, and a power detection unit for detecting whether or not the feeder wire is pressurized, and electrically connected to the tip fitting. And a joint for connecting a ground wire by fitting a joint attached to the tip of the ground wire, and a rope for lifting the ground wire with an electric rope reel attached to the base end of the operation rod. And a ground wire lifting portion for lifting the ground wire to the joint portion.

Further, the present invention is characterized in that a notifying section for wirelessly informing the power detection result from the power detecting section is provided at a base end portion of the operation rod.

Further, according to the present invention, a grounding confirmation unit for detecting the connection of the grounding line and confirming the completion of the grounding of the grounding line is attached to the joint unit, and the grounding confirmation unit wirelessly connects to the notification unit. The feature is that it is notified.

Further, according to the present invention, the power supply to the electric rope reel of the ground wire lifting unit is stopped by the detection output of the electric power detection unit to disable the operation of the electric rope reel. Features.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a grounding device with a voltage detector according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the grounding device with a voltage detector has a tip fitting 2 made of a conductor formed into a hook shape and easily hooked on an electric wire 1, and a long operating rod extending from a base end of the tip fitting 2. 3, a tip end of the operating rod 3, which is electrically connected to and attached to the tip fitting 2, which is electrically connected to the tip fitting 2, and which is electrically connected to the tip fitting 2. Joint part 7 that is fitted with a joint 6 attached to the tip of the ground wire 5 to connect the ground wire 5
And a ground confirming part 8 connected to and attached to the joint part 7 for confirming the grounding of the ground wire 5, and a ground wire lift attached to the base end portion of the operating rod 3 to lift the ground wire 5 to the joint part 7. Unit 9 and a notifying unit 10 attached to the base end portion of the operation rod 3 to notify the result of the electric detection and the completion of the grounding.
It is composed of

A plurality of operation rods 3 of about 1 to 1.5 m,
For example, three insulating pipes 3a, 3b, 3c made of a good quality insulating material, for example, FRP (fiber reinforced plastic) are connected to form a desired length.

As shown in FIG. 2, the power detection unit 4 includes a power detection circuit 11 electrically connected to the tip fitting 2, a radio transmission circuit 12 connected to the power detection circuit 11, Circuit 11
And an indicator light 13 composed of an LED or the like, which is connected to the power supply circuit, detects the presence or absence of pressurization of the electric wire 1 based on the input voltage of the tip fitting 2, and detects the detection output of the electricity detection circuit 11. As a result, the radio transmission circuit 12 transmits radio waves indicating the state of charge of the feeder wire 1 and the indicator lamp 13 blinks. In FIG. 2, reference numeral 14 denotes a test switch connected to the power detection circuit 11, which is turned on to apply the voltage of the battery 15 for the power detection test to the power detection circuit 11. It tests whether the wireless transmission circuit 12 operates normally. Reference numeral 16 denotes a power detection ground wire derived from the power detection circuit 11 of the power detection unit 4, and is grounded to the ground side by a ground metal 17 provided at the end.

The joint portion 7 is provided with a joint holder 18 having a fitting hole. The joint 6 attached to the tip of the ground wire 5 is fitted in the fitting hole of the joint holder 18.
And the ground wire 5 is connected.

As shown in FIG. 3, a proximity switch 19 which is turned on when the joint 6 attached to the end of the ground wire 5 is fitted to the joint holder 18 of the joint 7 and its proximity A wireless transmission circuit 20 connected to the switch 19 and a power supply battery 21 are provided.
When the joint 6 attached to the tip of the ground wire 5 is fitted to the joint holder 18 of the joint part 7, the proximity switch 19 is turned on to indicate the ground state of the ground wire 5 to the wireless transmission circuit 2.
Wireless transmission is performed at 0.

The ground wire lifting unit 9 is provided with an electric rope reel 23 for winding up the ground line lifting rope 22 so that it can be pulled out. Through the pulley 24 provided rotatably in the section,
The ground wire 5 is lifted by winding the ground wire lifting rope 22 with the electric rope reel 23 and the tip is connected to the joint 7. A rope lock 25 is provided above the ground line lifting unit 9, and the rope lock unit 25 locks the ground line lifting rope 21.

As shown in FIG. 4, the notification unit 10 includes a radio reception circuit 26 for receiving radio waves from the radio transmission circuit 12 of the power detection unit 4, and an oscillation circuit 27 connected to the radio reception circuit 26. , An electric detection lamp 28 and an alarm buzzer 29 composed of an LED or the like connected to the oscillation circuit 27, a relay coil 30 connected to the wireless reception circuit 26, and an electric rope reel of the relay coil 30 and the ground wire lifting unit 9. 23, a safety switch 31 that is turned off when a voltage is applied from the wireless reception circuit 26 to the relay coil 30 to stop power supply to the electric rope reel 23;
A radio receiving circuit 32 for receiving a radio wave from the radio transmitting circuit 20 of the grounding confirmation unit 8, a transmitting circuit 33 connected to the radio receiving circuit 32, and an LE connected to the transmitting circuit 33
D and the like, and a ground lamp 34 made of D or the like.

A grounding fitting 35 is provided at the base end of the grounding wire 5, and the grounding fitting 35 is grounded to the ground.

The procedure for using the grounding device with a voltage detector having the above configuration will be described below.

First, as shown in FIG. 5, a test switch 14 in the power detection unit 4 is turned on to test whether the power detection circuit 11 and the radio transmission circuit 12 operate normally.
Grounding bracket 1 of power detection ground wire 16 derived from power detection unit 4
The grounding metal 7 of the ground wire 7 and the grounding wire 5 are grounded to the ground side via the rail 36, and the metal fitting 2 at the tip of the operating rod 3 is hooked to the electric wire 1. At this time, the notification unit 10
After confirming that the electric detection lamp 27 is not lit and the alarm buzzer 28 does not sound, the electric rope reel 23 of the ground wire lifting unit 9 is operated to take up the ground wire lifting rope 22. , The ground wire 5 is lifted. Then, as shown in FIG. 6, when the ground wire 5 is lifted and the joint 6 attached to the end thereof is fitted to the joint holder 18 of the joint part 7, the proximity switch 19 of the ground confirmation part 8 is turned on and the wireless communication is performed. The transmission circuit 20 transmits a radio wave, and the radio reception circuit 32 of the notification unit 10 receives the radio wave, and turns on the ground lamp 34 via the oscillation circuit 33.
After confirming that the grounding is completed by turning on the grounding lamp 34, the grounding wire lifting rope 22 is fixed by the rope lock portion 25 so that the grounding does not come off.

Further, if the tip metal 2 at the tip of the operating rod 3 is hooked on the feed wire 1 and the feed wire 1 is pressurized, the tip fitting 2, the voltage detection circuit 11, the ground wire for voltage detection, etc. 1
6. A current flows through the grounding bracket 17 and the ground path, and the indicator light 13 blinks with the current. At the same time, the radio transmission circuit 12 transmits a radio wave, and the radio wave is received by the radio reception circuit 26 of the notification unit 10, and the electric detection lamp 2 is transmitted through the oscillation circuit 27.
8 flashes and the alarm buzzer 29 sounds. In addition, the relay coil 30 operates to turn off the switch 31, and the power supply to the electric rope reel 23 of the ground wire lifting unit 9 is stopped to disable the operation of the electric rope reel 23.
At this time, since the electric rope reel 23 does not operate even if the switch of the ground wire lifting unit 9 is pressed, there is no danger that the pressurizing wire is erroneously grounded.

[0024]

As described above, according to the present invention,
Since the detector and the grounding device are integrated, the grounding wire can be grounded at the position where the power failure has been confirmed, and the pressurizing wire can be prevented from being erroneously grounded, thereby improving safety. Further, since a thick ground wire as large as 100 mm ² is lifted by the electric rope reel provided at the base of the operation rod, considerable labor is not required when grounding the feeder wire, and workability can be improved. In addition, since the electric rope reel is linked to the voltage detector, the pressurizing wire is not accidentally grounded and is safe. In addition, the power detection result and grounding completion are notified to the notification unit provided at the base of the operation rod by radio, so that the power detection result and grounding completion can be confirmed at hand, so that it can be used in bright or noisy places. Confirmation can be made surely even during work.

[Brief description of the drawings]

FIG. 1 is a diagram showing a grounding device with a voltage detector according to the present invention.

FIG. 2 is a circuit diagram illustrating a configuration of a power detection unit.

FIG. 3 is a circuit diagram showing a configuration of a ground check unit.

FIG. 4 is a circuit diagram showing a configuration of a notification unit.

FIG. 5 is a drawing showing a state of power detection.

FIG. 6 is a diagram showing a grounding completed state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 feeder wire 2 tip fitting 3 operation rod 4 power detection unit 5 ground wire 6 joint 7 joint unit 8 ground check unit 9 ground wire lifting unit 10 reporting unit 22 ground wire lifting rope 23 electric rope reel

Continued on the front page (72) Inventor Hiroki Takashima 3-29-3, Ohama-cho, Amagasaki-shi, Hyogo Hasegawa Electric Industry Co., Ltd. (72) Inventor Shuji Soda 3-29-3, Ohama-cho, Amagasaki-shi, Hyogo Hase F-term (reference) in Kawa Denki Kogyo Co., Ltd. 2G035 AA23 AA25 AB02 AC01 AC13 AD10 AD39 AD45 AD51 AD64

Claims (4)

[Claims] 1. A tip fitting made of a conductor formed into a hook shape and easily hooked on an electric wire, a long operating rod extending from a base end of the tip fitting, and a distal end of the operating rod electrically connected to the tip fitting. A grounding wire that is connected and mounted, and that is fitted with a joint that is electrically connected to the above-mentioned metal fittings and that is attached to the end of the grounding wire, and that is connected to the above-mentioned metal fittings. And a ground wire lifting portion attached to the base end portion of the operation rod, winding up a ground wire lifting rope with an electric rope reel, and lifting the ground wire to the joint portion. A grounding device with a detector. 2. The grounding device with a voltage detector according to claim 1, further comprising a notifying unit provided at a base end portion of the operation rod to wirelessly notify a result of the voltage detection from the voltage detecting unit. 3. A ground confirming unit for detecting connection of a ground line and confirming completion of grounding of the ground line is attached to the joint unit, and the ground confirming unit wirelessly notifies the notification unit of the completion of grounding. The grounding device with a voltage detector according to claim 2, wherein: 4. The electric rope reel of the ground wire lifting unit is stopped from supplying power to the electric rope reel by a detection output of the power detection unit, and the operation of the electric rope reel is disabled. Item 4. The grounding device with a voltage detector according to any one of Items 1 to 3.