JP2018057198A - Grounding short circuit instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grounding short circuit instrument which can be easily attached to or be removed from an electric wire.SOLUTION: The present invention relates to a grounding short circuit instrument 1 having a short circuit tool 11, the tool 11 being easily attached to or removed from an electric wire 91 and the instrument 1 being used for shorted grounding of the electric wire 91. The short circuit tool 11 has an upper arm 32 which can be retained to the electric wire 91 and a lower arm 33 rotatably connected to the upper arm 32. The lower arm 33 rotates when the upper arm 32 is retained to the electric wire and holds the electric wire 91 with the upper arm 32. The lower arm 33 rotates under its's own weight when the upper arm 32 is retained to the electric wire 91.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grounding and short-circuiting instrument that has a short-circuiting tool that can be attached to and detached from an electric wire and is used for short-circuiting the electric wire.

  At the time of power outage work of the high-voltage distribution line, a short-circuit is attached to the high-voltage distribution line by attaching a grounding short-circuit device so that electricity does not flow through the high-voltage distribution line. When attaching a grounding short-circuit device to a high-voltage distribution line installed in a high place, connect the grounding short-circuit device to the tip of a long insulated operation rod (common operation rod) that is an indirect live tool, and operate the insulation operation rod. A grounding short-circuit device is attached to the high-voltage distribution line.

  A so-called twist lock mechanism is widely used for the connection between the insulating operation rod and the grounding short circuit device. The twist lock mechanism is a mechanism for connecting the insulation operation rod and the grounding short circuit device by pushing the distal end of the insulation operation rod into the base end of the grounding short circuit device and rotating it around the long axis.

  When the insulation operation rod is connected to the grounding short-circuit device using the twist lock mechanism, it is necessary to push in the insulation operation rod when the insulation operation rod is removed from the grounding short-circuiting device after the grounding short-circuiting device is attached to the high-voltage distribution line. However, since the high-voltage distribution line receives the force for pushing the insulating operation rod, workability is poor and there is a problem in safety.

  There is also a method of removing the insulation operation rod from the grounding short-circuit device while supporting it with an insulating jacket so that excessive force is not applied to the high-voltage distribution line. The burden of is very large.

  In order to improve workability, a grounding / shorting device that can be attached to and detached from an electric wire using an insulating operation rod and a binding hammer has also been proposed (see, for example, Patent Document 1).

JP 2009-177898 A

  According to the ground short-circuit instrument described in Patent Document 1, the workability is improved as compared with the case of using an insulated jacket, but it is still necessary to handle the indirect hot-line tool with both hands, which places a heavy burden on the operator.

  The objective of this invention is providing the earthing | grounding short circuit instrument which can be attached or detached easily to an electric wire.

  The present invention is a grounding short-circuit device that has a short-circuiting tool that can be attached to and detached from an electric wire, and is used for short-circuit grounding of the electric wire, and the short-circuiting tool is freely rotatable on the electric wire and the upper arm. A lower arm connected to the lower arm, and the lower arm rotates when the upper arm is hooked on the electric wire and grips the electric wire with the upper arm. .

  In the ground short-circuit apparatus according to the present invention, the lower arm is configured to rotate by its own weight when the upper arm is hooked on the electric wire.

  In the ground short-circuit apparatus according to the present invention, the upper arm has a rail groove on which the lower arm can slide.

  The ground short-circuit instrument according to the present invention further includes a rotation preventing means for preventing the lower arm from rotating until the upper arm is hooked on the electric wire.

  According to the grounding and short-circuiting apparatus of the present invention, since the electric wire is gripped by the upper arm and the lower arm only by performing the operation of hooking the upper arm of the short-circuiting tool on the electric wire, the work is easy and the indirect hot wire It becomes possible to perform attachment / detachment work with one hand using a tool.

It is a side view of the short-circuit tool 11 of the earth | ground short-circuit instrument 1 which is 1st Embodiment of this invention. It is a side view which shows the state attached to the electric wire 91 of the short circuit tool 11 of FIG. It is a front view of the earthing | grounding short circuit instrument 1 of FIG. It is a side view of the short circuit tool 51 of the earthing | grounding short circuit instrument 2 which is 2nd Embodiment of this invention. It is a side view which shows the state attached to the electric wire 91 of the short circuit tool 51 of FIG.

  FIG. 1 is a side view of a short-circuit tool 11 of a ground short-circuit instrument 1 according to a first embodiment of the present invention. FIG. 2 is a side view showing a state where the shorting tool 11 of FIG. 1 is attached to the electric wire 91. FIG. 3 is a front view of the ground short-circuit instrument 1 of FIG.

  The grounding / shorting device 1 of the present invention is a grounding / shorting device that is attached to the electric wire 91 when the electric wire 91 is short-circuited and includes three short-circuiting tools 11, 12, and 13.

  The short-circuit tools 11, 12, and 13 are respectively a main body portion 21 to which a ground fault cable 22 connected to the grounding electrode is connected when the electric wire 91 is short-circuited and a wire that is formed at the tip of the main body portion 21 and holds the electric wire 91. The grip portion 31 and the gripped portion 41 that is formed at the base end of the main body portion 21 and can be gripped by an indirect hot wire tool such as an insulating jacket 81 or quick, are attached to each phase of the three-phase wire 91. .

  The short-circuiting tools 11, 12, and 13 are not limited to a specific material, but at least a conduction formed of a material capable of conducting electricity from a position in contact with the electric wire 91 of the upper arm 32 to the ground fault cable 22. The route is secured.

  The main body 21 has a cylindrical shape, and a temporary placement bar 23 that can temporarily place the other two shorting tools 12 and 13 is horizontally attached to the main body 21 of one of the three shorting tools 11. . The configuration of the three short-circuiting tools 11, 12, and 13 is the same except for the presence or absence of the temporary placement bar 23.

  The electric wire gripping portion 31 has an hook-like upper arm 32 that has an opening and can be hooked on the electric wire 91, and two lower arms 33 that are rotatably connected to the upper arm 32 via a connecting pin 34. When the upper arm 32 is hooked on the electric wire 91, the electric wire 91 comes into contact with the lower arm 33, and the lower arm 33 self-weights in the direction in which the electric wire 91 is gripped around the connecting pin 34 (clockwise direction in FIG. 1). And the upper arm 32 and the lower arm 33 grip the electric wire 91.

  The upper arm 32 is integrally formed from the front end of the main body 21, has a hook portion formed in a C shape, and has an opening through which the electric wire 91 can pass.

  The lower arm 33 is formed in a substantially U shape, and a gripping surface 35 for gripping the electric wire 91 is formed to be inclined from the middle of the right side of the U shape to the middle of the lower side. The lower arm 33 includes a stopper 38 that restricts rotation in the direction opposite to the direction in which the electric wire 91 is gripped (counterclockwise direction in FIG. 1), and the lower arm 33 before the electric wire 91 contacts the timepiece in FIG. A protrusion 39 that prevents the rotation in the rotating direction and a weight 40 that rotates the lower arm 33 in the clockwise direction of FIG. 1 are provided.

  When the upper arm 32 is hooked on the electric wire 91, the lower arm 33 is pushed up by the upper portion 36 coming into contact with the electric wire 91 and rotates in the clockwise direction of FIG. The shape and arrangement are determined so that the electric wire 91 is gripped and the tip of the upper arm 32 enters between the lower portions 37 of the two lower arms 33.

  The connecting pin 34 is configured to be able to rotatably connect the lower arm 33 to the upper arm 32. The connecting pin 34 may be fixed to the upper arm 32 and the lower arm 33 may be rotatably attached to the connecting pin 34. The connecting pin 34 may be rotatably attached to the upper arm 32 and the lower arm 33 may be connected to the connecting pin 34. It may be fixed to.

  The stopper 38 is attached to the upper surface of the upper part 36 of the two lower arms 33, and the upper part 36 and the lower part 37 of the lower arm 33 are in contact with the upper arm 32 in a horizontal state. It arrange | positions so that rotation in the counterclockwise direction of FIG. 1 may be controlled.

  The protrusion 39 is formed on the inner side (upper arm 32 side) of the upper part 36 of the lower arm 33, and is arranged so that the upper part 36 and the lower part 37 of the lower arm 33 are held in close contact with the upper arm 32 in a horizontal state. Has been. The frictional force of the protrusion 39 prevents the lower arm 33 from rotating in the clockwise direction in FIG.

  The weight 40 is attached to the base end of the upper portion 36 of the lower arm 33. The weight 40 is determined in weight, shape, and arrangement so that the lower arm 33 rotates in the clockwise direction in FIG. 1 when the wire 91 comes into contact with the upper portion 36 of the lower arm 33 and the projection 39 is removed from the upper arm 32. It is done.

  The gripped portion 41 is formed in a cylindrical shape having an open lower end so that it can be easily gripped with an insulative hot wire tool such as an insulating Yatco 81 or quick. The gripped portion 41 is formed with a groove 42 constituting a twist lock mechanism so that the insulating operation rod can be easily attached and detached. In the ground short-circuit instrument according to the present invention, the groove 42 (twist lock mechanism) is not essential since the opening of the gripped portion 41 is gripped with an insulating jacket or quick when the wire 91 is attached to or detached from the wire 91.

  Next, a method for attaching and detaching the ground short-circuit instrument 1 of this embodiment to and from the electric wire 91 will be described. When the grounding short-circuiting instrument 1 is attached to the electric wire 91, the gripped portion of the short-circuiting tool 11 including the temporary placing bar 23 in a state where the other two shorting tools 12 and 13 are hooked on the temporary placing bar 23 of the shorting tool 11. 41 is gripped by the insulating Yatco 81.

  The insulated Yatco 81 is operated, the electric wire 91 is passed through the opening of the upper arm 32, and the upper arm 32 is hooked on the electric wire 91 so that the electric wire 91 contacts the upper part 36 of the lower arm 33. Until the upper arm 32 is hooked on the electric wire 91 and is brought into contact with the upper portion 36 of the lower arm 33, the rotation of the lower arm 33 is prevented by the stopper 38 and the protrusion 39.

  When the electric wire 91 is brought into contact with the lower surface of the upper portion 36 of the lower arm 33 and the insulating yoke 81 is slightly pulled down, the lower arm 33 is pushed into the electric wire 91 and the projection 39 is detached from the upper arm 32, and the lower arm 33 is self-weighted (weight 40). 1), the electric wire 91 is gripped by the gripping surface 35 of the upper arm 32 and the lower arm 33. Further, the tip of the upper arm 32 enters between the lower portions 37 of the two lower arms 33, and the short-circuit tool 11 is prevented from falling off from the electric wire 91.

  After that, the insulating jacket 81 is separated from the gripped portion 41, and the two short-circuiting tools 12 and 13 hooked to the temporary placement rod 23 are attached to the remaining two-phase electric wires (not shown) in the same manner.

  When the grounding short-circuiting instrument 1 is removed from the electric wire 91, first, it is removed from the short-circuiting tools 12 and 13 that are not provided with the temporary placement rod 23. When the gripping portion 41 of the short-circuiting tool 12 is gripped by the insulating Yatco 81 and operated to lift the short-circuiting tool 12 and the lower arm 33 is pushed by the electric wire and rotated counterclockwise in FIG. Since the opening is opened, the shorting tool 12 is removed from the electric wire as it is. At this time, the upper arm 32 may be fitted into the protrusion 39 to prevent the lower arm 33 from rotating, but the operation may be continued without fitting the upper arm 32 into the protrusion 39.

  The short-circuit tool 12 removed from the electric wire is hooked on the temporary placement rod 23, and the other short-circuit tool 13 not provided with the temporary placement rod 23 is removed from the electric wire in the same manner and hooked on the temporary placement rod 23. When the short-circuiting tools 12 and 13 are hooked on the temporary placing rod 23, the upper arm 32 and the lower arm 33 may hold the temporary placing rod 23, or the upper arm 32 may be hooked only without being held. Good. Finally, the short-circuiting tool 11 provided with the temporary placement rod 23 is removed from the electric wire 91 in the same manner, and the grounding short-circuiting instrument 1 is recovered.

  As described above, according to the grounding and short-circuiting instrument 1 of the present embodiment, the upper arm 32 and the lower arm 33 can be operated only by performing the operation of hanging the upper arm 32 of the short-circuiting tools 11, 12, and 13 on the electric wire 91. While the electric wire 91 is gripped, the tip of the upper arm 32 enters between the two lower arms 33 and the opening of the upper arm 32 is closed to prevent the short-circuit tools 11, 12, 13 from falling off the electric wire 91. Is done. Furthermore, since the attaching / detaching operation can be performed with one indirect hot-wire tool, the operation is easy and the operation with one hand is also possible.

  In addition, according to the grounding short-circuiting instrument 1 of the present embodiment, the electric wires 91 of the short-circuiting tools 11, 12, and 13 can be used by using an indirect hot wire tool such as an insulating YATCO 81 or Quick without using an insulating operating rod (common operating rod). Since the attaching / detaching work can be performed, the work of attaching / detaching the insulating operating rod to / from the shorting tool 11, 12, 13 in the state where the shorting tool 11, 12, 13 is attached to the electric wire 91 becomes unnecessary. Is drastically reduced, and the load on the electric wire 91 is also reduced, thereby improving safety.

  FIG. 4 is a side view of the short-circuit tool 51 of the ground short-circuit instrument 2 according to the second embodiment of the present invention. FIG. 5 is a side view showing a state where the shorting tool 51 of FIG. 4 is attached to the electric wire 91. The same code | symbol is attached | subjected to the structure same as the earthing | grounding short-circuit instrument 1 of 1st Embodiment shown in FIGS. 1-3, and description is abbreviate | omitted. The grounding short-circuiting instrument 2 of the present embodiment is the same as the grounding short-circuiting instrument 1 of the first embodiment in the basic configuration, method of use, and the procedure for gripping the wire 91, but the top of the wire gripping part 53 of the shorting tool 51. The shapes of the arm 54 and the lower arm 55 are different. Moreover, the electric wire 92 which attaches / detaches the shorting tool 51 is thick.

  In the upper arm 54 of the ground short-circuit instrument 2 of the present embodiment, a rail groove 56 capable of sliding the lower arm 55 (connection pin 34) and the rotation of the lower arm 55 in the counterclockwise direction in FIG. A step 57 is formed. In the ground short-circuit instrument 2 of this embodiment, the connecting pin 34 is inserted into the rail groove 56 and the lower arm 55 is fixed to the connecting pin 34.

  The rail groove 56 and the step 57 are formed such that the lower surface of the lower portion 59 of the lower arm 55 is in contact with the step 57 and becomes horizontal with the connecting pin 34 positioned at the upper end of the rail groove 56 (see FIG. 4). ).

  Further, the rail groove 56 has a gripping surface 35 between the upper arm 54 and the lower arm 55 in a state where the upper arm 54 is hooked on the electric wire 92 and the lower arm 55 is rotated so that the connecting pin 34 is positioned at the lower end of the rail groove 56. Thus, the electric wire 92 is formed so as to be gripped (see FIG. 5).

  The lower arm 55 has an upper portion 58 that is longer than the lower arm 33 of the ground short-circuiting device 1 of the first embodiment so that the electric wire 92 can be easily brought into contact with. The lower portion 59 is formed to be longer than the lower arm 33 of the ground short-circuiting device 1 of the first embodiment so that the distal end portion enters, and the stopper 38 is not provided.

  The protrusion 39 of the lower arm 55 is disposed so as to sandwich the base end portion (the portion above the step 57) of the upper arm 54 with the upper portion 58 and the lower portion 59 being horizontal.

  According to the ground short-circuit instrument 2 of the present embodiment, the movable range of the lower arm 55 is widened by the rail groove 56, so that the range of the thickness of the detachable electric wire is widened.

  As mentioned above, although the ground short-circuit instrument which concerns on this invention was demonstrated using the ground short-circuit instrument 1 and 2 of 1st and 2nd embodiment, the ground short-circuit instrument which concerns on this invention is not limited to the said embodiment. The gist can be modified without changing the gist. For example, the shapes of the upper arm and the lower arm are not limited to those described above, and the upper arm may be a U-shaped hook and the lower arm may be approximately C-shaped. At least the upper arm only needs to be able to be hooked on the electric wire, and the lower arm only needs to be able to rotate by its own weight when the upper arm is hooked on the electric wire to grip the electric wire.

  Moreover, in the ground short-circuit instrument according to the present invention, the gripped portion may not be formed in a cylindrical shape but may be formed in another shape that is easy to grip. The main body is not limited to a cylindrical shape.

  In the ground short-circuit apparatus according to the present invention, the rotation restricting means for restricting the rotation of the lower arm in the direction opposite to the direction in which the electric wire 91 is gripped is not limited to the stopper 38 or the step 57. You may comprise so that rotation of a lower arm may be controlled by restricting rotation of a pin. Further, the rotation preventing means for preventing the lower arm from rotating in the direction of gripping the electric wire 91 is not limited to the protrusion 39. Moreover, the installation location of the rotation restricting means and the rotation preventing means is not limited to a specific location.

  As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification. Therefore, such changes and modifications are interpreted as being within the scope of the invention defined by the claims.

DESCRIPTION OF SYMBOLS 1, 2, Grounding short circuit instrument 11, 12, 13, 51 Short circuit tool 32, 54 Upper arm 33, 55 Lower arm 39 Protrusion 56 Rail groove 91 Electric wire

Claims (4)

A grounding and short-circuiting instrument that has a short-circuiting tool that can be attached to and detached from an electric wire and is used for short-circuiting the electric wire,
The short-circuit tool includes an upper arm that can be hooked on an electric wire, and a lower arm that is rotatably connected to the upper arm,
The lower arm rotates when the upper arm is hooked on an electric wire and grips the electric wire with the upper arm.   The grounding short-circuit apparatus according to claim 1, wherein the lower arm is configured to rotate by its own weight when the upper arm is hooked on an electric wire.   The grounding short-circuit apparatus according to claim 1, wherein the upper arm has a rail groove on which the lower arm is slidable.   The grounding short-circuit device according to any one of claims 1 to 3, further comprising a rotation preventing means for preventing the lower arm from rotating until the upper arm is hooked on the electric wire.

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