JP2003230207A - Detection grounding tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detection grounding tool capable of facilitating attaching onto a conductor draw-out rod or a terminal, eliminating a fear of part dropping-off, and improving safety and efficiency in attaching work. <P>SOLUTION: A fixing tool 15 of a grounding rod 11 with a supporting plate is constituted of a wire rope 16 connected with a bolt 17 on its end. The single end of the wire rope 16 is jointed to the supporting plate 13, and the wire rope 16 is wound around an object to be wound. After that, the bolt 17 on one end is fitted into an attaching hole 14 provided with a cut section 14a from plate outer periphery side, and a butterfly nut 18 previously fitted onto the bolt 17 is tightened. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthing / grounding tool for use in a power failure work such as inspection and repair of power transmission / distribution lines and substation equipment.

[0002]

2. Description of the Related Art In the case of a high-voltage or extra-high voltage power line for power outage work, the power outage is used to check the power outage and to prevent electric shock accidents due to contact with other power lines or induction from other power lines. The Occupational Safety and Health Regulations mandate that short-circuit grounding be performed reliably using short-circuit grounding equipment.

An instrument used for electric power detection and short-circuit grounding is shown in FIG. In the electric grounding tool 1 of FIG. 4, a grounding rod with a supporting plate, which is composed of a grounding rod 2 and a supporting plate 3 which is integral with the grounding rod 2, is attached to a conductor lead-out rod or a terminal at the end of an electric circuit using U bolts 5. A mounting hole 4 is provided in the support plate 3, and a U-bolt 5 that straddles a conductor lead-out rod or a terminal is passed through the mounting hole 4 and tightened with a nut 6.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Since there is a risk of electric shock until this is attached to the conductor pull-out rod or terminal and short-circuit grounding is completed, it is necessary to wear insulating gloves and leather gloves. Therefore, the nut 6 is attached to the U bolt 5 and the spanner is used. It is difficult to operate, the workability is poor, and it takes time to install.

Further, the mounting is carried out at a high place on a steel tower or a pedestal, and the scaffolding is also unstable. Therefore, the ground rod with a supporting plate, U bolts, nuts, spanners, etc. should be dropped during the work.
There was also a risk of damage to the insulator and personal injury.

An object of the present invention is to eliminate the above-mentioned inconveniences found in the conventional grounding instrument for electric detection, to facilitate the mounting, improve the safety of work, and improve the efficiency.

[0007]

In order to solve the above problems, according to the present invention, a fixture for a grounding rod with a support plate is attached to a wire rope having a bolt integrally connected to one end thereof, and the bolt is screwed to the bolt. The supporting plate is provided with a mounting hole provided with a cutout opening on the outer periphery of the plate, the other end of the wire rope is fixed to the supporting plate, and the wire rope is a conductor. It is arranged such that it is wound around the outer periphery of the pull-out rod or the terminal, the bolt at one end is inserted into the mounting hole through the notch, and the wing nut on the bolt is tightened.

This electro-detecting grounding tool is provided with a bolt integrally connected to the other end of the wire rope, and the bolt at the other end is passed through a mounting hole having no notch provided in the support plate, so that the bolt penetrates. It is preferable that the wing nut received by the support plate is screwed.

The mounting hole may be a horizontally long hole,
It is also preferable to attach a cotter pin that prevents the wing nut from coming off to the tip of the bolt.

[0010]

In the present invention, since the wire rope with a bolt, which replaces the conventional U-bolt, is fixed to the support plate integrated with the ground rod, the grounding device for electro-detection is integrated.

Further, since the bolt at the end of the wire rope is fitted into the mounting hole provided with the cutout from the outer periphery of the support plate and the wing nut which is screwed to the bolt in advance is tightened, it is necessary to attach and detach the wire rope and the nut. There is no need for a spanner. Therefore, the work is easy and the parts and the spanner do not drop. With the cotter pin attached to the tip of the bolt, the wing nut will not loosen too much and will not come off.

In addition, since the wire rope is used as a fixture, there is a degree of freedom in responding to changes in the size of the object to be attached, and the range of use is expanded. In the case where the mounting hole is a horizontally long hole, the distance between the ends of the wire rope can be adjusted within the range of accommodation by the long hole, and the degree of freedom in responding to the size change of the mounting object is further increased.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show an embodiment of an electroscopic grounding tool of the present invention. The grounding device 10 for detecting electric power is composed of a grounding rod 11 with a supporting plate and a fixture 15 for mounting the grounding rod 11 to a conductor lead-out rod or terminal.

The grounding rod 11 with a support plate is formed by mounting the grounding rod 12 having a support 12a on one surface of the support plate 13 and has two horizontally long mounting holes 14 in the support plate 13. A notch 14a that opens to the outer periphery of the support plate 13 is provided in one of the mounting holes 14, and the ground rod 11 with a support plate shown in the figure is no different from the conventional product except for this point. Therefore, the conventional product can be used by adding the cutout port 14a.

As shown in FIG. 3, the fixture 15 comprises a wire rope 16, bolts 17 connected to both ends of the wire rope 16, and a wing nut 18 screwed to each bolt. Bolt 1
A compression sleeve 17a is connected to the rear portion of the wire 7, and the compression sleeve 17a is caulked to fix the wire rope end inserted into the hole of the sleeve.

A bolt 17 on one side of the fixture 15 is passed through the mounting hole 14 on the side having no cut opening, and a wing nut 18 is provided on the penetrating portion.
The wire rope 16 is fastened to the support plate 13 at one end (the other end) by screwing. Further, the wing nut 18 is screwed onto the other bolt 17, and the split pin 19 (see FIG. 3) is attached to the tips of the two bolts 17 to prevent the wing nut 18 from coming off.

As a result, the detecting grounding tool 10 is fixed to the fixing tool 1.
The whole body including 5 is integrated and easy to handle.

The electric grounding tool 10 is a wire rope 1.
6 is wound around the outer periphery of the object to be attached (conductor lead-out rod or terminal), and the bolt 17 in the free state is fitted into the attaching hole 14 having the notch from the notch 14a as shown by the chain line in FIG. Tightening the nut 18 completes the installation. Figure 2
Shows a state in which the exemplary electro-detecting grounding tool 10 is attached to the terminal T.

The fixture 15 is a wire rope 16
It is preferable to prepare several types having different lengths and to use them properly according to the size of the object to be attached.

Further, as shown in the drawing, if the bolts 17 are provided at both ends of the wire rope 16, the length adjustment amount can be increased, but the other end side of the wire rope 16 can be fixed to the support plate 13. The bolt 17 on the other end side and the wing nut 18 screwed to the bolt 17 are not essential.

[0021]

As described above, the electro-detecting grounding tool of the present invention employs a wire rope in which a bolt is connected to the end instead of the U bolt used conventionally, and the other end of the wire rope is supported. Since it was fixed to the plate and the bolt on one end side was fitted from the outer peripheral side of the support plate into the mounting hole with the notch, the wing nut that was screwed into the bolt in advance was tightened, so the entire fixture including the fixture is It is integrated and handling is improved.

Further, the wire rope and the wing nut can be attached without removing the wrench, the work can be easily performed, and the parts and the like are not dropped.

Further, since it is fixed to the object to be attached with the wire rope, it is possible to flexibly cope with the size change and the range of use is expanded.

It should be noted that the conventional detection grounding tool took about 1 hour to be mounted on the three-phase electric circuit, but the exemplary detection grounding tool could be installed in about 20 to 30 minutes, which is a time saving effect. Was extremely remarkable. In addition, for that reason, the efficiency of power line blackout work was improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an electroscopic grounding tool of the present invention.

FIG. 2 is a perspective view of the grounding tool in the same use state.

FIG. 3 is a plan view of the fixture.

FIG. 4 is a perspective view of a conventional grounding device for electroscopic detection.

[Explanation of symbols]

10 Electrostatic grounding tool 11 Grounding rod with support plate 12 grounding rod 13 Support plate 14 mounting holes 14a notch 15 Fixture 16 wire rope 17 Volts 17a Crimping sleeve 18 wing nut 19 split pins T terminal

Claims (4)

[Claims] 1. An electrostatic detection grounding tool comprising a grounding rod with a supporting plate having an integrally supporting plate at a root end thereof, and a fixture for mounting the grounding rod with the supporting plate on an outer circumference of a conductor lead-out rod or a terminal. An attachment hole comprising a wire rope having a bolt integrally connected to one end and a wing nut screwed to the bolt, and a supporting plate having a notch opening to the outer periphery of the plate. The other end of the wire rope is fixed to the support plate, the wire rope is wound around the outer circumference of the conductor pull-out rod or the terminal, and the bolt at one end is inserted into the mounting hole through the notch. An electroscopic grounding tool characterized by tightening a nut. 2. A butterfly which is provided with a bolt integrally connected to the other end of the wire rope, and the bolt at the other end is passed through a mounting hole having no notch provided in the support plate, and the bolt penetrated by the support plate receives the bolt. The grounding device for electro-detection according to claim 1, wherein a nut is screwed. 3. The mounting hole is a horizontally long hole.
Alternatively, the electroscopic grounding tool described in 2. 4. The grounding device for electro-detection according to claim 1, wherein a split pin for preventing the wing nut from coming off is attached to the tip of the bolt.