JP2004357407A - Wire stretcher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire stretcher capable of preventing the separation of an initially mounted gripping tool from an electric wire. <P>SOLUTION: The wire stretcher is so composed that a triangular wedge 8 capable of fitting-in/separating-from a space 7 between a fixed shaft 2 of a body 1 and a tension lever 6 by spring force is arranged at the tip of the tension lever 6. The triangular wedge 8 is fitted in the space 7 between the fixed shaft 2 of the body 1 and the tension lever 6. Thus, the movement of a clamp lever 3 is constrained. As a result, it can prevent the separation of the gripping tool from the electric wire. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire tensioner for holding an electric wire at two positions at intervals when performing an electric wire sorting operation or the like in an electric work under a live line such as an uninterruptible work.
[0002]
[Prior art]
Conventionally, various types of wire feeders have been put into practical use (for example, Patent Document 1 or Patent Document 2).
When attaching a wire tensioner to an electric wire, first fix one of the gripping tools attached to both ends of the extendable insulating rod to the electric wire, and then connect the other gripping tool from the gripping tool. The work of fixing to the electric wire at a distant position and then contracting and tensioning the insulating rod is performed.
[0003]
However, due to vibration during attachment of the last gripping tool, the movable member of the first gripping tool may be slightly displaced, and fixing to the electric wire may become uncertain. When the gripping interval is short, it is easy to check the fixed state again, but when the interval is long, the final gripping tool is visually checked from the mounting position, and even if you think it is okay, May cause problems such as detachment from the electric wire.
[0004]
[Patent Document 1] Japanese Utility Model Publication No. 7-36416 [Patent Document 2] Japanese Patent Application Laid-Open No. 11-4511
[Problems to be solved by the invention]
The present invention has been made to solve the problems described in the prior art, and an object of the present invention is to provide a tensioning device that can prevent the gripping tool attached first from being detached from the electric wire. .
[0006]
[Means for Solving the Problems]
The tensioner of the present invention is pivotally attached to a fixed shaft provided at the same horizontal level with a space between the main body, and at the upper end of two clamp levers of the same length inclined in parallel with the receiving portion of the main body at any time. In a wire tensioner in which a wire holding metal fitting is loosened so as to have a proper interval and a lower end of the crank lever is loosely attached to a pulling lever, a spring force is applied to the tip of the pulling lever. A triangular wedge that can be inserted and removed is installed in a space between the fixed shaft and the pulling lever.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An example of an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the receiving part 4 of the main body 1 is attached to the upper ends of two clamp levers 3 of the same length that are pivotally attached to a fixed shaft 2 provided at the same horizontal level with an interval in the main body 1 and inclined in parallel. In the wire tensioner in which the wire holding metal fitting 5 is loosely mounted so as to always have an appropriate interval and the lower end of the crank lever 3 is loosely attached to the pulling lever 6, As shown in FIG. 2, a triangular wedge 8 that can be inserted and removed by a spring force is installed in a space portion 7 formed between the fixed shaft 2 of the main body 1 and the pulling lever 6.
[0008]
FIG. 3 is a side view showing an embodiment in which a triangular wedge 8 is installed at the distal end portion of the tension lever 6. A slide groove 9 is provided in the horizontal direction and is fixed to the distal end portion of the pulling lever 6. When the front end of the substantially U-shaped lever 12 having the spring hooking protrusion 11 provided at the rear end at the front end of the base 10 is rotated counterclockwise. , And can be rotated to a position where the short side a of the generally square-shaped lever 12 is substantially horizontal, and when the generally square-shaped lever 12 is rotated clockwise, the generally square-shaped lever 12 The lever 12 is attached so as to be rotatable by a predetermined angle.
[0009]
The spring hooking protrusion 11 ′ of the triangular wedge 8 provided with a guide pin 13 at an appropriate distance in the horizontal direction from the spring hooking protrusion 11 ′ and the spring hooking protrusion 11 ′ at the rear end is slid on the base 10. The groove 9 is mounted so as to be movable back and forth.
[0010]
As shown in FIG. 3, in the state where the short side a of the substantially letter-shaped lever 12 is rotated counterclockwise to a substantially horizontal position, the spring-hanging projection of the substantially letter-shaped lever 12 11 and the spring hooking protrusion 11 ′ of the triangular wedge 8 are tensioned and attached.
[0011]
Therefore, in this state, as shown in FIG. 3, the spring hooking protrusion 11 ′ of the triangular wedge 8 is pulled back by the spring force of the spring 14, and is retracted to the end of the slide groove 9 of the base 10. The wedge 8 is detached from the space 7 between the fixed shaft 2 of the main body 1 and the pulling lever 6.
[0012]
Next, in the state where the electric wire 15 is gripped between the receiving portion 4 of the main body 1 and the electric wire presser 5, as shown in FIG. 4, when the substantially square-shaped lever 12 is rotated clockwise, Due to the spring force of the spring 14, the spring hooking projection 11 ′ of the triangular wedge 8 advances in the slide groove 9 of the base 10, and the triangular wedge 8 moves between the fixed shaft 2 of the main body 1 and the tension lever 6. Is inserted into the space portion 7 to restrain the movement of the clamp lever-3.
[0013]
Therefore, unless the triangular wedge 8 is removed, the electric wire 15 maintains a state of being gripped between the receiving portion 4 of the main body 1 and the electric wire pressing metal 5.
[0014]
The triangular wedge 8 may be installed only on one of the pulling levers 6 of the gripping tool attached to both ends of the extendable insulating rod. The electric wire is gripped by the gripping tool on which the wedge 8 having the shape is installed, and the triangular wedge 8 is fitted into the space 7 between the fixed shaft 2 and the pulling lever 6 of the main body 1 to clamp the lever 3 The procedure is to move to the gripping tool which is in the next distant position and where the triangular wedge 8 is not installed, to grip the electric wire with this gripping tool, and to shrink the insulating rod. The work goes on.
[0015]
【The invention's effect】
The present invention is configured as described above, and the triangular wedge 8 is fitted into the space 7 between the fixed shaft 2 of the main body 1 and the pulling lever 6 by the spring force to restrain the movement of the clamp lever-3. Therefore, the trouble that the gripping tool is detached from the electric wire can be prevented.
[Brief description of the drawings]
1 is a side view of a gripping tool before a triangular wedge is installed. FIG. 2 is a right side view of FIG. 1. FIG. 3 is a side view of a gripping tool with a triangular wedge installed. Fig. 3 is a side view showing a state in which a triangular wedge is fitted into the space between the fixed shaft of the main body and the pulling lever.
1 Body 2 Fixed shaft 3 Crank lever
4 Receiving part 5 of the body 5 Wire clamp 6 Pulling lever
7 Space between the fixed shaft of the main body and the pulling lever 8 Triangular wedge 9 Slide groove 10 Base 11, 11 ′ Spring-hanging protrusion 12 L-shaped lever
13 Guide pin 14 Spring 15 Electric wire a Short side of a substantially U-shaped lever

Claims (1)

The main body (1) is supported at the upper ends of two clamp levers (3) of the same length, which are pivotally attached to a fixed shaft (2) provided at the same horizontal level with an interval from the main body (1). In the wire tensioner formed by loosening the electric wire holding metal fitting (5) so as to always have an appropriate distance from the portion (4) and loosening the lower end of the crank lever (3) to the pulling lever (6), The tip end of the tension lever (6) can be inserted into and removed from the space (7) between the fixed shaft (2) of the main body (1) and the tension lever (6) by a spring force. Wire rod, characterized in that a triangular wedge (8) is installed

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