JP3078682B2 - Ground resistance measurement connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding device which is attached to a power pole of an overhead power distribution line, inserted in the middle of a grounding wire from a transformer installed on the power pole, and used for periodically measuring its grounding resistance. The present invention relates to a connector for measuring resistance.

[0002]

2. Description of the Related Art Conventionally, grounding resistance is measured by a bolt-type connector 3 as shown in FIG. 1 in which the upper and lower ends of a grounding wire 2 from a transformer which is vertically divided are overlapped and fastened. When measuring the grounding resistance, the screw of the bolt type connector 3 was loosened, the grounding wire 2 was cut off, and the measurement was performed by connecting a measuring instrument.

[0003] The connector 3 is mounted at a relatively high place of the utility pole 1 and is a dangerous operation because the screw must be loosened to break the ground wire 2.

[0004]

In order to facilitate this measuring operation, Japanese Utility Model Publication No. 52-51578, "Earth measuring terminal device" has been proposed.
Was thought. The mounting state of the improved structure is as shown in FIG. That is, in this device, the end of the ground wire 2 divided vertically is inserted into a terminal fitting 6 which is opened in the upper part of the cylinder, and is fixedly fastened by a tightening screw 7. The divided upper and lower terminals 6 and 6 are brought into conduction by the plate-shaped connecting conductor 8. The connecting conductor 8 is fixed to the upper and lower terminals 6, 6 by a fixing screw 5A,
5B is fixedly connected. When measuring ground resistance,
By loosening the fixing screws 5A and 5B of the connecting conductor 8 and removing the connecting conductor 8, the conduction state between the terminals 6 and 6 is cut off, and measurement is performed by connecting a measuring device in the same manner as described above. 4 in the figure
Denotes a case, 9 denotes a band through hole, and 10 denotes a band.

Also in this case, it is necessary to loosen the fixing screws 5A and 5B in order to remove the plate-shaped connecting conductor 8 connecting the upper and lower terminals 6 and 6, which is a dangerous work at a high place.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to improve the above-mentioned point, and has an upper terminal conductor having a compression cylinder portion which is compression-coupled to a ground wire on a transformer side installed on a utility pole. And a lower terminal conductor having a compression cylinder portion that is compression-coupled to a ground line on the ground side connected to the ground, and mounted inside the connector body made of synthetic resin, and the upper terminal conductor and the lower terminal conductor of the main body are connected to each other. A synthetic resin cover that has a conductive clip part that contacts and connects them to the connector, is configured to be openable and closable by fitting with a pin provided on the cover and a groove provided on the main body, and compressing the upper and lower terminal conductors. A connector for measuring a ground resistance, comprising a bush made of an insulator fitted to a main body so as to cover a connecting portion.

[0007]

According to the present invention, the divided ground wire is inserted into the cylindrical portions at both the upper and lower ends of the synthetic resin grounding resistance measuring device main body to form a compression connection, and the upper and lower terminals provided on the main body are brought into contact with the clip. A structure in which pins at both upper and lower ends of the cover are fitted into upper and lower pin holes of the main body, and the ground wire fixed and separated by shifting downward is connected through the upper and lower terminals and the clip portion. It is another object of the present invention to provide a grounding resistance measuring connector capable of separating the upper and lower terminals of the main body by opening and closing a cover.

According to the present invention, the connection of the ground wire is fixed to the upper and lower terminal conductors of the connector as compression connection, respectively.
Variations in continuous ground wire disconnection work due to conventional screw tightening,
Other dangerous work was eliminated, and the connection reliability and safety were improved. In addition, by adopting the clip contact type connecting means, by opening the cover, it is possible to divide the terminals, and in the work of separating the terminals in the measurement work, it is not necessary to loosen the fixing screw as in the conventional case. Work efficiency is improved and safety is improved.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 3A and 3B, reference numeral 1 denotes a utility pole, and 2 denotes a ground line. In the present invention, the mounting band through hole 9 is provided between the ground wires 2 and 2 which divide the ground resistance measuring connector 11.
A band 10 is inserted through the band, and the connector 10 is attached to the telephone pole by the band 10. (See FIGS. 3A and 3B)

FIGS. 4 (A), (B), (C) and FIG.
(A), (B), and (C) show details of the connector of the present invention, and 12 shows a connector body made of synthetic resin.
A synthetic resin cover 13 is engaged with the cover 12 so as to be freely opened and closed. 14 is a bush, 15 and 16 are pins provided on the cover 13.
The cover 13 is engaged with the main body 12 so that the cover 13 can be opened and closed by fitting the upper and lower grooves 5 and 16 into the upper and lower slots 17 and 18 provided in the main body 12. Reference numeral 19 denotes a non-slip projection provided on the cover 13.
14 is a compression cylinder 2 provided at the end of the upper and lower terminal conductors 20A and 20B.
It is a bush made of an insulating material such as rubber which covers a connection portion between the first and the second and the ground wires 2 and 2. A recess 14A is provided at the base of the bush 14, and the bush 14 is fixed to the main body 12 by fitting with the projection 12A of the main body 12.

FIGS. 5A, 5B and 5C and FIG.
(A) and (B) show the details of the engagement state between the connector body 12 and the cover 13. 5 and 6, the pin 15 of the cover 13 is fitted into the slot 17 of the main body 12, and the cover 13 is opened from the main body 12 by pulling the tip 13A of the cover 13. In this case, the cover 13 has the pins 15 and 16
Since the pins 16 are fitted to the pins 7 and 18, the pins 16 can be disengaged from the slots 18 and opened by slightly shifting them upward. 20A,
20B is an upper terminal conductor and a lower terminal conductor, and a compression cylinder portion is provided at each end of the upper terminal conductor 20A and the lower terminal conductor 20B.
21A and 21B are formed, and the ground wires 2 and 2 are
Fit into 21A, 21B, compress and firmly connect. Since the connector body 12 is made of an insulating material such as a synthetic resin, it is insulated from the upper and lower terminal conductors 21A and 21B by insulating protrusions 12B having a predetermined interval. In contrast, cover 13
When the cover 13 is fitted to the connector body 12, the connection clip 22 is fitted over the upper and lower terminal conductors 20A, 20B to form the two terminal conductors 20A, 20B.
It connects and conducts.

As described above, the connector according to the present invention comprises a main body 12 made of synthetic resin (insulating material), a cover 13 in which a connection clip 22 made of resin and having a spring property is embedded, and a terminal conductor made of copper.
A bush 14 made of an insulating material such as synthetic rubber or the like is used.

The method of using the apparatus of the present invention is as follows. The upper and lower ground wires 2 are inserted into cylindrical terminal conductors 20A and 20B which are partially covered with resin (insulator), divided into two pieces, and having holes. Thereafter, the compression cylinder portions 21A and 21B are compressed and connected. Then, the exposed conductor compression cylinder portions 21A and 21B are covered with a bush 14 made of an insulating material.
Pass through 10 and fix it to utility pole 1.

At the time of ground resistance measurement, the cover 13 is slid upward and opened to the front, so that the cylindrical terminal conductor 20A,
The connection clip 22 in contact with the contact 20B is separated, the upper and lower ground wires 2, 2 are cut off, and the measuring instrument connection terminal conductors 20A, 20B are exposed, so that measurement can be performed.

The cover 13 is slid at the time of opening and closing, so that a connection clip integrated with the cover 13 is provided.
22 also slides with respect to the terminal conductors 20A, 20B, so that the contact surfaces of the terminal conductors 20A, 20B are polished, and the terminal conductors 20A, 20B are polished.
The reliability of the connection between B and the connection clip 22 is improved.

[0016]

The present invention has the advantage that the connection of the ground wire is a compression connection, the work variation due to screw tightening is eliminated, and the reliability of the connection is improved. In addition, in the present invention, since the clip contact method is adopted for opening and closing the terminal conductors, it is possible to divide the terminals by opening the cover. There is no need for loosening work, and the opening and closing work of the terminal is quick and easy, and there is a great industrial advantage that the working efficiency is improved.

[Brief description of the drawings]

FIG. 1 is an elevation view showing an example of a conventional device.

2A is a front view of a conventional ground resistance measuring terminal device, FIG. 2B is a side view thereof, and FIG.
FIG. 4 is a front view showing a state where the case of the terminal device is opened, and FIG. 4 (D) is a side sectional view showing a state where the case is closed.

FIG. 3A is a front view showing a state in which the ground resistance measuring connector of the present invention is attached to a telephone pole, and FIG. 3B is a side view thereof.

4 (A) is a front view of a grounding resistance measuring connector of the present invention, FIG. 4 (B) is a side view thereof, and FIG.
It is a partial exploded view.

5 (A) is a side view showing a state in which a ground resistance measuring connector of the present invention is opened, FIG. 5 (B) is a view of the cover taken along the arrow X, and FIG. It is a Y arrow view of a cover.

FIG. 6A is a longitudinal sectional view of a ground resistance measuring connector of the present invention, and FIG. 6B is an AA sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power pole 2 Ground wire 3 Bolt type connector 4 Case 5A, 5B screw 6 Terminal 7 Tightening screw 8 Communication conductor 9 Band through hole 10 Band 11 Grounding resistance measurement connector 12 Connector body 13 Cover 14 Bush 15, 16 pin 17.18 Slot 19 Non-slip projection 20A Upper terminal conductor 20B Lower terminal conductor 21A, 21B Compression cylinder 22 Connection clip

──────────────────────────────────────────────────続 き Continuing on the front page (72) Isao Miwa, inventor, Kunikun Denki Co., Ltd. 3-35-3, Yoshimachi, Soka-shi, Saitama Prefecture (56) References Full-scale operation 48-73784 (JP, U) 1987-40571 (JP, U) JP-A 2-16066 (JP, U) JP-A 52-51578 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01R 27 / 20 H01R 13/46

Claims (1)

(57) [Claims] 1. An upper terminal conductor having a compression cylinder portion compression-coupled to a transformer-side ground wire provided on a telephone pole, and a compression cylinder portion compression-coupled to a ground-side ground wire connected to ground. A synthetic resin cover having a lower terminal conductor having a conductive clip portion for attaching the lower terminal conductor to the upper terminal conductor and the lower terminal conductor of the main body by clipping and connecting the lower terminal conductor and the lower terminal conductor. Is configured to be openable and closable by fitting with a pin provided on the cover and a groove provided on the main body, and further provided with an insulator bush which is fitted to the main body so as to cover the compression coupling portion of the upper and lower terminal conductors. A connector for measuring a ground resistance.