JP4370174B2 - Detachable tool for LA connector - Google Patents

Description

  The present invention relates to an LA connector attaching / detaching tool for attaching or removing an LA connector attached to an LA (lightning arrester) by an indirect hot wire method in a high voltage overhead distribution line.

The attachment / detachment operation of the LA connector to the lightning arrester has been conventionally performed by a power failure operation or a direct hot wire method.
JP 2002-270330 A (first page, FIG. 1) JP 2000-068113 A (first page, FIG. 1)

  However, in the power outage work, the supply of electric power is stopped during the work, which causes a great inconvenience to power users such as business establishments and ordinary houses. Therefore, when adopting the direct hot wire method, there is a risk of electric shock during work, and the worker wears protective equipment such as an insulating jacket and high-pressure rubber gloves as a means to prevent electric shock. There was a problem that physical or mental fatigue due to sweating increased. Therefore, it is conceivable to replace the direct hot wire method with the indirect hot wire method. However, the indirect hot wire gripper is equipped with a detachable tool such as a magic hand, and this magic hand is operated to connect the LA connector. When trying to attach and detach from the lightning arrester, many of the LA connectors are formed in a cylindrical shape, which makes the gripping state unstable and causes the LA connector to fall off the magic hand. In addition to increasing the risk of accidents, there is a concern that work efficiency will be significantly reduced.

  This invention is invented in view of the said subject, and provides the attachment / detachment tool for LA connectors which can carry out the operation | work of attachment or removal of an LA connector with respect to a lightning arrester safely and easily by an indirect hot wire construction method. is there.

The present invention is an LA connector attaching / detaching tool for attaching or removing an LA connector with a cable connected to an upper part of a lightning arrester by operating an indirect hot wire gripping tool. And a connecting means for attaching the gripping means to the indirect live wire gripping tool. The gripping means is made of a hard insulating material and can be divided into two vertically, and has elasticity. The outer sleeve and the inner sleeve are engaged by the engaging means, and the LA connector fitting inlet is provided at one end and the cable outlet is provided at the other end. , fitting a slit extending over the extraction opening from the inlet, without the sleeve with each inside of the inner sleeve, toward the fitting opening of the LA connector withdrawing port of the upper end side cable, inner diameter S to Yes and formed to be small tapering the slit, characterized in that the inside and outside of the gripping means has a width to freely out of the cable.

  Here, the sleeve shape refers to the LA connector connected to the lightning arrester and the cable extending from the LA connector, (1) gripping the LA connector, (2) preventing interference of the gripping means with the cable, and (3) slits. It is a shape which can satisfy each of these conditions (1) to (3), that is, the passage of the cable at. In addition, the connecting means is not particularly limited as long as it can facilitate both attachment and removal work to the indirect hot wire gripping tool. Further, the connecting means includes the gripping means and the indirect hot wire. What provided the function which can adjust an angle with a holding tool may be used. The material forming the gripping means can be applied to any soft and elastic material such as synthetic rubber, and any hard material such as reinforced plastic, but it is an insulating material because it is used for live construction. It is desirable.

  In the present attachment / detachment tool formed in this way, when attaching the LA connector to the lightning arrester, the operator first brings the attachment / detachment tool attached to the indirect hot wire gripping tool closer to the lightning arrester, and then connected to the lightning arrester. After the extension direction of the cable extending from the connector and the extending direction of the slit of the gripping means are matched, the cable is directly passed through the slit, and the cable can freely slide between the fitting inlet / outlet of the gripping means And Then, the LA connector is pushed into the insertion port of the gripping means by sliding the gripping means along the cable, approaching the LA connector side, and approaching it as it is. Also, when removing the LA connector from the lightning arrester, follow the same procedure as when installing it, firmly grip the LA connector at the insertion port of the gripping means, and after gripping the LA connector, the operator operates the indirect hot wire gripper Then, by swinging the gripping means to the left and right, the LA connector is gradually removed from the lightning arrester, and as a result, the LA connector can be pulled to the operator side while being gripped by the gripping means.

Specific examples of the elastic material applied to the inner sleeve include synthetic rubber. Specific examples of the hard material that forms the outer sleeve include reinforced plastics, etc., but it should be hard enough to withstand the swelling of the inner sleeve when the LA connector is inserted, and it should also have insulating properties. There is no particular limitation. Further, the coupling means between the inner sleeve and the outer sleeve is not particularly limited as long as the inner sleeve cannot be pulled out from the opening on both ends of the outer sleeve. You may provide the latching nail | claw part and receiving hole in the arbitrary locations where the peripheral side and the outer peripheral side of an inner sleeve contact | connect, respectively .

According to the present invention, the outer sleeve is formed of a hard insulating material and can be vertically divided into two, the inner sleeve is formed of a material having elasticity, and the outer sleeve and the inner sleeve are engaged means. If the outer sleeve is broken to release the engaged state with the inner sleeve, the inner sleeve that has been consumed due to wear due to use or deterioration over time can be easily replaced. In addition, the operator can easily attach and detach the LA connector using an indirect live wire gripping tool without approaching the electric wire, so that the danger of electric shock can be avoided, as well as without feeling physical and mental fatigue, You can work efficiently.

Next, an embodiment of the LA connector attaching / detaching tool of the present invention will be described below.
As shown in FIG. 1, the LA connector attaching / detaching tool has a gripping means 1 made of a reinforced plastic outer sleeve 2 and a synthetic rubber fixed to the inner peripheral side of the outer sleeve 2 via coupling means 13 and 14. The inner sleeve 1a and a connecting means 4 for connecting the indirect live wire gripping tool 7 provided on the outer peripheral portion of the outer sleeve 2 are configured.

  As shown in FIGS. 2 and 3, the inner sleeve 1a among the constituent members of the gripping means 1 is opened from the lower end side opening (LA connector fitting inlet) S of the inner sleeve 1a to the upper end side opening (the outlet of the cable 6). The inner diameter gradually decreases toward R, and when the inner peripheral surface of the inner sleeve 1a and the LA connector 5 are in contact with each other, the LA connector 5 is inserted deeply into the inner sleeve 1a. The tightening of the inner peripheral surface of the sleeve 1a to the LA connector 5 is gradually strengthened, and the elasticity of the synthetic rubber forming the inner sleeve 1a is combined to firmly grip the LA connector 5. The inner sleeve 1a is provided with a slit 3a extending from the insertion opening S to the outlet R of the inner sleeve 1a. The slit 3a is larger than the thickness of the cable 6 extending from the LA connector 5. It has a wide width (about 15 mm), and in actual work, the cable 6 is guided through the slits 3a and 3b into the inner sleeve 1a, and the LA connector 5 is not removed from the lightning arrester 8, so that the insertion opening S of the inner sleeve 1a is obtained. Can be brought to a position directly above the LA connector 5.

Next, the outer sleeve 2 is formed of a reinforced plastic and includes a slit 3b extending from the upper end opening R to the lower end opening S as in the case of the inner sleeve 1a, and can be further divided into two vertically. Further, as coupling means 13 and 14 with the inner sleeve 1a, the outer sleeve 2 has a receiving hole 14 on the peripheral surface of the outer sleeve 2 with respect to the claw portions 13 and 13 protruding in the left and right directions opposite to each other on the peripheral surface of the inner sleeve 1a. , 14 are provided, and the claw portions 13, 13 are engaged with the receiving holes 14, 14, so that the slits 3a, 3b of the inner and outer sleeves 1a, 2 are aligned with each other, and further, the slits 3a, 3b, Each of S and the outlet R communicates. Then, the projecting pieces 10a and 10b of the divided parts of the outer sleeve 2 are fixed with screws 15 so that the inner sleeve 1a is coupled to the inner peripheral surface of the outer sleeve 2 in a state where it cannot be pulled out.
The upper end opening R serves also as an outlet for the cable 6, and the lower end opening S serves also as an insertion port for the LA connector 5.

  Next, the connecting means 4 includes an extended portion 16 of the projecting piece 10a of the outer sleeve 2 and a base portion 11 that can be connected to the twist lock portion 12 of the indirect live wire gripping tool 7, and further, the extended portion. 16 and the base 11 are in contact with each other in a state where the circular ratchet surfaces 17a and 17b are overlapped with each other. It is possible to move and fix at the swing position, and thereby the angle at which the gripping means 1 is inserted into the cable 6 can be freely adjusted.

Next, an actual use procedure of the LA connector attaching / detaching tool having the above-described configuration will be described step by step based on each drawing.
In this embodiment, the case where the LA connector 5 is removed from the lightning arrester 8 is described.
First, when the detachable tool is approached to the LA connector 5 connected to the upper part of the lightning arrester 8, as shown in FIG. 4 (a), the cable 6 extending the slits 3a, 3b of the gripping means 1 from the LA connector 5; The slits 3a and 3b are inserted as they are. Then, after the cable 6 is passed through the slits 3a and 3b and the cable 6 is inserted into the inner sleeve 1a so as to pass through the fitting inlet S and the outlet R, as shown in FIG. Using the fact that 6 extends to the LA connector 5, the operator operates the indirect hot wire gripping tool 7 in the direction of lowering, and inserts the upper enormous portion 18 of the LA connector 5 into the insertion opening S of the inner sleeve 1a. Then, as shown in FIG. 4C, while holding the LA connector 5, the indirect hot wire gripping tool 7 is operated so as to be repeatedly swung left and right, and the LA connector 5 is gradually pulled out from the lightning arrester 8. Finally, as shown in FIG. 4 (d), the LA connector 5 is pulled out in a state of being gripped by the present attachment / detachment tool, and is taken to the operator side to complete the operation.

It is a perspective view which shows the use condition of the attachment / detachment tool for LA connectors by this invention. It is the top view which notched a part of FIG. It is the longitudinal cross-sectional view which notched a part of FIG. It is explanatory drawing which shows the use procedure of the attachment / detachment tool for LA connectors of this invention.

Explanation of symbols

1,1a Inner sleeve (gripping means)
2 Outer sleeve (gripping means)
3a, 3b Slit 4 Connecting means 5 LA connector 6 Cable 7 Indirect hot wire gripping tool 8 Lightning arrester 13 Claw part (coupling means)
14 Receiving hole (coupling means)
S Inlet R Outlet

Claims (1)

An LA connector attaching / detaching tool for attaching or removing an LA connector (5) with a cable (6) connected to an upper part of a lightning arrester (8) by operating an indirect hot wire gripping tool (7),
The tool body includes gripping means (1, 1a, 2) of the LA connector (5), and connection means (4) for attaching the gripping means (1, 1a, 2) to the indirect live wire gripping tool (7). Consisting of
The gripping means (1, 1a, 2) is composed of an outer sleeve (2) formed of a hard insulating material and capable of being vertically divided into two, and an inner sleeve (1a) formed of a material having elasticity. The outer sleeve (2) and the inner sleeve (1a) are engaged by the engaging means (13, 14), and the insertion port (S) of the LA connector (5) is provided on one end side, and the other end side is provided. withdrawing port of cable (6) to (R), further, fitting port (S) slit extending over the extraction opening (R) from (3a, 3b) and forms a sleeve-like with each inner sleeve (1a ) Is formed in a tapered shape in which the inner diameter gradually decreases from the fitting port (S) of the LA connector (5) toward the outlet port (R) of the upper end side cable (6).
The slit (3a, 3b) has a width that allows the cable (6) to be taken in and out of the gripping means (1, 1a, 2).

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