JP3229429U - Short circuit grounding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach / detach to / from an electric circuit terminal even a weak worker such as a woman or an elderly worker, and to attach / detach to an electric circuit terminal provided in a narrow place or a high place. Provided is a short-circuit grounding device that can be easily attached / detached, secures a stable attachment state to the electric circuit terminal portion, and has few restrictions such as application locations. SOLUTION: A connector A is provided with a clip member 1 capable of sandwiching a terminal portion of an electric circuit, and an operation mechanism 2 for operating the opening and closing of the clip member 1. The operation mechanism 2 guides the pair of clip pieces 1a so as to orbit the guide portions 2a provided on the grip portions 1a2 of the pair of clip pieces 1a of the clip member 1 and the guide portions 2a of the pair of clip pieces 1a. An operation string 2b that is hung on a portion 2a and one end of which is locked to a locking portion 2b1 of one clip piece 1a, and a rod-shaped grip portion 2c extending from a grip portion 1a2 of one clip piece 1a. And have. [Selection diagram] Fig. 3

Description

The present invention is used to prevent the risk of electric shock due to erroneous energization, contact with other electric circuits, or induction from other electric circuits when performing maintenance and inspection of high-voltage electric equipment such as cubicle type high-voltage power receiving equipment. Regarding short-circuit grounding equipment.

When performing maintenance and inspection of high-voltage power receiving equipment, open the electric circuit of the high-voltage power receiving equipment, check for a power failure with a voltage detector, and receive an electric shock due to incorrect energization, contact with another electric circuit, or induction from another electric circuit. In order to prevent the danger of short-circuit grounding, it is stipulated in the Industrial Safety and Health Regulations that short-circuit grounding equipment should be used. The short-circuit grounding device is roughly classified into an electric wire hooking type and a terminal portion holding type. As a terminal portion holding type short-circuit grounding device, for example, those described in the following Patent Documents 1 to 5 are known. There is.

Normally, a short-circuit grounding device that holds the terminal part (hereinafter, simply referred to as "short-circuit grounding device") is detachably attached to the terminal part of a three-phase wire circuit such as a breaker or a switch of high-voltage power receiving equipment. It is provided with one electric circuit side connector and one ground side connector that is detachably attached to the ground terminal portion. As for the method of connecting the three electric wire side connectors and one ground side connector, for example, as shown in Patent Documents 1 and 2, the three electric wire side connectors are connected in series with an electric wire cable, and 1 A mode in which one electric wire side connector and a ground side connector are connected by one electric wire cable, and for example, as shown in Patent Documents 4 and 5, the electric wire side electric wire cable is attached to each of the three electric wire side connectors. At the same time, there is a mode in which one ground-side electric wire cable is connected to the ground-side connector, and three electric wire-side electric wires cables and one ground-side electric wire cable are connected by a branch connection portion. Further, as the method of the electric circuit side connector, for example, as shown in Patent Documents 1 to 3, a spring clip type for manually attaching and detaching to and from the electric circuit terminal portion, and for example, Patent Documents 4 and 5 show. As described above, there is an operation method in which an opening / closing mechanism composed of a link mechanism, a cam mechanism, or the like is provided in a connector, and the opening / closing mechanism is operated by an operating tool such as an operating rod to attach / detach to / from the electric circuit terminal portion.

Jikkenhei 7-7076 Jikkenhei 5-61958 JP-A-2010-146896 JP-A-2002-152935 JP-A-2006-340457

In the spring clip type connector, in order to prevent it from easily coming off from the terminal part, the spring force of the spring interposed between the pair of clip pieces is increased, and the terminal part is held by the holding part of the pair of clip pieces. It is configured to hold firmly. Therefore, when attaching or detaching to the terminal part, a relatively large force is required to open the holding part of the pair of clip pieces against the spring force, and it is used for workers with weak force such as women and elderly workers. It is often difficult. Further, in a cubicle type high-voltage power receiving facility or the like, a terminal portion for grounding may be provided in a narrow place or a high place, and it is often difficult to attach / detach while holding the connector.

On the other hand, the operation-type connector is configured to open and close an opening / closing mechanism composed of a link mechanism, a cam mechanism, and the like by utilizing the rotation torque accompanying the rotation operation of the operation tool such as the operation rod. .. Therefore, when attaching / detaching to / from the terminal portion, the operation of rotating the operating tool is troublesome, and the workability is not good. In addition, it is often impossible to rotate the operating tool due to the installation location of the terminal portion and the peripheral members thereof, and there are many restrictions on the applicable location and the like. Further, since the holding force of the terminal portion by the opening / closing mechanism depends on the rotation torque of the operating tool, there is a concern that the mounting state to the terminal portion may become unstable depending on the method of rotating the operating tool. ..

In view of the above-mentioned problems in the prior art, the present invention allows even a weak worker such as a female or an elderly worker to easily attach / detach to / from the electric circuit terminal, and is narrow. Short-circuit grounding that can be easily attached to and detached from the electric circuit terminals provided in places and high places, secures a stable mounting state to the electric circuit terminals, and has few restrictions on the application location, etc. The challenge is to provide equipment.

In order to solve the above problems, the present invention is a short-circuit grounding device provided with a connector that can be detachably attached to a terminal portion of an electric path, wherein the connector includes a clip member capable of sandwiching the terminal portion and the clip member. The clip member is provided with an operation mechanism for operating the opening and closing of the clip member, and the clip member rotatably connects a pair of clip pieces having a holding portion on the tip end side and a grip portion on the base end side and the pair of clip pieces. The operation mechanism includes a hinge portion and a spring that urges the pair of clip pieces in a direction in which the sandwiching portion closes, and the operating mechanism includes a guide portion provided on each grip portion of the pair of clip pieces and the pair. An operation string that is hung on the guide portion of the pair of clip pieces so as to go around the guide portion of the clip piece and one end of which is locked to one of the pair of clip pieces, and the pair of clip pieces. Provided is a short-circuit ground contact device provided with a rod-shaped grip portion extended to one of the grip portions.

According to the present invention, even a weak worker such as a woman or an elderly worker can easily attach / detach to / from the electric circuit terminal portion, and the electric circuit terminal provided in a narrow place or a high place. It is possible to provide a short-circuit grounding device that can be easily attached to and detached from the portion, secures a stable attachment state to the electric circuit terminal portion, and has few restrictions such as an application location.

1 is a side view {FIG. 1 (a)} showing a state when the clip member according to the first embodiment is closed, and a side view {FIG. 1 (b)} showing a state when the clip member is opened. FIG. 2 (a) is a perspective view showing a state when the clip member according to the first embodiment is closed, and FIG. 2 (b) is a perspective view showing a state when the clip member is opened. A partial cross-sectional view {FIG. 3 (a)} showing a state when the clip member according to the first embodiment is closed, and a partial cross-sectional view {FIG. 3 (b)} showing a state when the clip member is opened. Is. 2 is a side view {FIG. 4 (a)} showing a state when the clip member according to the second embodiment is closed, and a side view {FIG. 4 (b)} showing a state when the clip member is opened.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 show a connector A that is detachably attached to a terminal portion of an electric circuit in the short-circuit grounding device of the first embodiment. The short-circuit grounding device of this embodiment is used, for example, for short-circuiting and grounding an open three-phase wire circuit of a switch in a cubicle-type high-voltage power receiving facility, and is attached to three terminals of the three-phase wire circuit. It includes one connector A and one connector (not shown) attached to the ground side. An electric wire cable B is connected to each connector A, and the three wire cables B of the three connector A are connected to one wire cable connected to the connector on the ground side by a branch connection. Will be done. The connection tool on the ground side may be the same as that of the connection tool A, may be a normal spring clip type, or may be of another type.

The connector A includes a clip member 1 capable of sandwiching a terminal portion of an electric circuit, and an operation mechanism 2 for operating the opening and closing of the clip member 1.

The clip member 1 includes a pair of clip pieces 1a having a holding portion 1a1 on the tip end side and a grip portion 1a2 on the base end side, a hinge portion 1b that rotatably connects the pair of clip pieces 1a, and a pair of clip pieces 1a. The spring that urges the holding portion 1a1 in the closing direction is configured as a main element. The above-mentioned spring is, for example, a coil spring, and is arranged inside the hinge portion 1b. The clip piece 1a is made of a conductive metal material, and a grip cover 1a3 made of an electrically insulating resin material or a rubber material is attached to the grip portion 1a2. The electric wire cable B is connected to one clip piece 1a, and a short-circuit plate 1c that electrically short-circuits the two clip pieces 1a is attached to the pair of clip pieces 1a.

As shown in FIG. 3, the operation mechanism 2 has a pair of clip pieces so as to orbit the guide portion 2a provided on the grip portion 1a2 of the pair of clip pieces 1a and the guide portion 2a of the pair of clip pieces 1a. The operation string 2b hung on the guide portion 2a of 1a and the rod-shaped grip portion 2c extending from one of the grip portions 1a2 of the pair of clip pieces 1a are configured as main elements.

In this embodiment, the guide portion 2a is composed of a shaft-shaped component arranged inside the grip portion 1a2. For example, as shown enlarged in the two-dot chain line circle of FIG. 3A, the guide portion 2a is pivotally supported inside the grip portion 1a2 and has an axis parallel to the rotation axis of the hinge portion 1b. The shaft 2a1 and the shaft sleeve 2a2 extrapolated to the support shaft 2a1 are configured as main elements. The operating string 2b hung on the guide portion 2a comes into contact with the outer peripheral surface of the shaft sleeve 2a2, and the outer peripheral surface of the shaft sleeve 2a2 guides (guides) the movement in the circumferential direction (the hung direction). The shaft sleeve 2a2 is made of a material having a small coefficient of friction from the viewpoint of reducing the frictional resistance with respect to the operating string 2b. In this embodiment, the shaft sleeve 2a2 is made of engineering plastic, particularly polyacetal resin.

In this embodiment, the operation string 2b is hung around the guide portion 2a of the pair of clip pieces 1a a plurality of times, for example, twice, and one end portion thereof is locked on one clip piece 1a. It is locked to the portion 2b1. The operating string 2b is made of a material having a small coefficient of friction from the viewpoint of reducing the frictional resistance with respect to the shaft sleeve 2a2. In this embodiment, the operation string 2b is formed of a resin-made twisted string, particularly a polyethylene resin-made three-strand string (diameter of about 4 mm).

In this embodiment, the grip portion 2c is formed in a hollow rod shape with an electrically insulating material such as fiber reinforced plastic (FRP), and is connected to the end portion of the grip portion 1a2 of one clip piece 1a. The grip portion 2c is connected, for example, by externally fitting one end of the grip portion 2c to a short shaft-shaped fitting portion extending from the end of the grip portion 1a2, and then fixing the grip portion 2c by an appropriate means such as a set screw. To do. An opening 2c1 (see FIG. 2) through which the operation string 2b can pass is provided on the side of the grip portion 2c, and a rubber or resin cap 2c2 is provided on the other end of the grip portion 2c. It is installed.

One end of the operation string 2b is locked to the locking portion 2b1 of one clip piece 1a, the guide portion 2a of the pair of clip pieces 1a is circulated twice, and then the other end side portion is one clip piece 1a. Enters the inside of the grip portion 2c from the grip portion 1a2 of. Then, the other end side portion of the operation string 2b passes through the inside of the grip portion 2c and exits from the opening 2c1 of the grip portion 2c to the outside of the grip portion 2c. A handle 2b1 is provided at the other end of the operating string 2b protruding from the grip portion 2c.

1 (a), 2 (a), and 3 (a) show the state of the connector A at all times (when the opening / closing of the clip member 1 is not operated). The pair of clip pieces 1a are rotated around the hinge portion 1b by the urging force of the spring, the distance between the grip portions 1a2 is widened, and the sandwiching portions 1a1 are closed to each other. Further, the other end of the operation string 2b is outside the grip portion 2c.

When attaching the connector A to the terminal portion of the electric circuit, as shown in FIGS. 1 (b), 2 (b), and 3 (b), grip the grip portion 2c with one hand and use the other hand. The handle 2b1 of the operation string 2b is grasped, the handle 2b1 is pulled, and the other end side portion of the operation string 2b is pulled in the direction of the arrow (front direction). Then, the portion of the operation string 2b that orbits the guide portion 2a of the pair of clip pieces 1a moves counterclockwise on the paper surface of FIG. 3 while being guided by the outer peripheral surface of the shaft sleeve 2a2 of the guide portion 2a. As a result, the loop of the circumferential portion of the operation string 2b is narrowed, and the distance between the guide portions 2a of the pair of clip pieces 1a is narrowed. Therefore, the pair of clip pieces 1a rotate around the hinge portion 1b against the urging force of the spring, the distance between the grip portions 1a2 is narrowed, and the holding portions 1a1 are opened. In this state, the holding portion 1a1 of the pair of clip pieces 1a is addressed to the terminal portion of the electric circuit. At that time, the other end side portion of the pulled operation string 2b is overlapped with the outer surface of the grip portion 2c, and the grip portion If it is gripped with one hand together with 2c, the attachment work to the terminal portion can be performed with one hand (one hand). Then, after the sandwiching portion 1a1 of the pair of clip pieces 1a is addressed to the terminal portion of the electric circuit, when the pulling state of the operation string 2b is released, the loop of the circumferential portion of the operation string 2b is released in the reverse operation of the above. It expands, and the distance between the guide portions 2a of the pair of clip pieces 1a increases. Therefore, the pair of clip pieces 1a are rotated around the hinge portion 1b by the urging force of the spring, the distance between the grip portions 1a2 is widened, and the sandwiching portions 1a1 are closed to each other. As a result, the connector A is attached to the terminal portion of the pair of clip pieces 1a with the sandwiching portion 1a1 sandwiching the terminal portion of the electric circuit.

On the other hand, when removing the connector A from the terminal portion of the electric circuit, the operation mechanism 2 is operated in the same procedure as described above, the sandwiching portions 1a1 of the pair of clip pieces 1a are opened, and the connector A is removed from the terminal portion. Remove.

The connector A of the short-circuit grounding device of this embodiment is hung on the guide portion 2a of the pair of clip pieces 1a so as to orbit the guide portion 2a of the pair of clip pieces 1a, and one end portion thereof is hung on the guide portion 2a of the pair of clip pieces 1a. Since the grip member 1 is opened and closed by pulling and releasing the other end portion of the operation string 2b locked to the locking portion 2b1 of 1a, the grip member 1 can be opened with a relatively small force. it can. The force required to open the grip member 1 also differs depending on the number of times the operation string 2b orbits the guide portion 2a of the pair of clip pieces 1a and the frictional resistance between the operation string 2b and the guide portion 2a (shaft sleeve 2a2). However, under the conditions of this embodiment (number of laps 2, shaft sleeve 2a2 made of polyacetal resin, operating string 2b made of polyethylene resin), with respect to a normal spring clip type connector having the same spring force (holding force). The grip member 1 can be opened with about half the force. Therefore, even a weak worker such as a woman or an elderly worker can easily attach / detach the connector A to / from the terminal portion of the electric circuit. Further, the work of attaching / detaching the connector A to / from the terminal portion of the electric circuit can be easily performed with one touch only by pulling / releasing the operation string 2b. Moreover, since the holding force of the clip member 1 is uniformly determined by the urging force of the spring interposed between the pair of clip pieces 1a, when the pulling state of the operation string 2b is released, the terminal portion of the electric path is the clip member 1. It is always held by a constant force. As a result, a stable attachment state of the connector A to the terminal portion of the electric circuit is ensured.

Further, since the rod-shaped grip portion 2c is extended to the grip member 1, it is possible to easily attach / detach the connector A to / from the terminal portion of the electric circuit provided in a narrow place or a high place.

Further, the operation of pulling / releasing the operation string 2b is less restricted by the relationship with the installation location of the terminal portion of the electric circuit and the peripheral members thereof, and therefore the applicable range of the connector A is wide.

FIG. 4 shows the connector B according to the second embodiment. The connector B according to the second embodiment is different from the connector A according to the first embodiment described above in that an opening 2c1'in which the operation string 2b can pass is provided at the other end of the grip portion 2c. It is a point that is being done. In the example shown in FIG. 4, the opening 2c1'is provided in the rubber or resin cap 2c2'attached to the other end of the grip portion 2c. Since other matters are the same as those of the connector A according to the first embodiment described above, duplicate description will be omitted.

A Connector 1 Clip member 1a Clip piece 1a1 Clipping part 1a2 Grip part 1b Hinge part 2 Operating mechanism 2a Guide part 2b Operating string 2b1 Handle 2c Gripping part 2c1 Opening 2c1'Opening

Claims (4)

In a short-circuit grounding device equipped with a connector that can be detachably attached to the terminal of an electric circuit.
The connector includes a clip member capable of sandwiching the terminal portion and an operation mechanism for operating the opening and closing of the clip member.
The clip member includes a pair of clip pieces having a holding portion on the tip end side and a grip portion on the base end side, a hinge portion for rotatably connecting the pair of clip pieces, and the holding portion of the pair of clip pieces. Equipped with a spring that urges the clip in the closing direction
The operation mechanism is hung on a guide portion provided on each of the grip portions of the pair of clip pieces and a guide portion of the pair of clip pieces so as to orbit the guide portion of the pair of clip pieces. One end thereof is provided with an operation string locked to one of the pair of clip pieces, and a rod-shaped grip portion extended to one of the grips of the pair of clip pieces. Short-circuit grounding device. The short-circuit grounding device according to claim 1, wherein the operating string is hung on the guide portions of the pair of clip pieces so as to orbit the guide portions of the pair of clip pieces a plurality of times. The grip portion is formed in the shape of a hollow rod, and the other end portion of the operation string passes through the inside of the grip portion and protrudes to the outside of the grip portion through an opening provided in the grip portion. The short-circuit grounding device according to claim 1 or 2. The short-circuit grounding device according to any one of claims 1 to 3, wherein a handle is provided at the other end of the operating string.

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