JP2010233420A - Insulation cover mounting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insulation cover mounting tool that mounts an insulation cover on an overhead cable easily, rapidly, and reliably by properly spreading out the insulation cover and reliably holding it. <P>SOLUTION: Connection fittings 2 for an insulated operation rod are attached to the lower end of a fixed gripping element 1 having a substantially U-shaped form, while a movable gripping element 17 with an operation rod 29 attached thereto that has a substantially L-shape opened downward is pivotally supported at the upper end of the fixed gripping element 1 via an biasing member 20. A spread-out insulation cover 31a/31b is gripped while being opened downward between the fixed gripping element 1 and the movable gripping element 17. Then, the movable gripping element 17 is pivoted downward to close the insulation cover 31a/31b to mount it on an overhead cable 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a tool for attaching an insulating cover that is used by being attached to a core wire exposed portion or the like of an overhead electric wire by an indirect hot wire method.

Conventionally, for example, in overhead wire construction in the event of an accident in an overhead wire, it is necessary to put the construction site in a non-voltage state to ensure safety, but it is possible to stop power transmission outside the construction site. There is nothing. For this reason, in general, in order to attach the clamp connected with the bypass cable after completion of the bypass construction over the construction site, the location where the overhead wire was stripped, and the blade electrode that penetrated the insulation coating was provided in the clamp In such a case, it is necessary to repair the exposed portion of the core wire of the overhead electric wire such as a residual penetration portion in order to prevent leakage of current and intrusion of rainwater.

By the way, as an insulating cover used for such a purpose, for example, a substantially semi-cylindrical cover member made of insulating plastic made into a pair on both sides is connected through a hinge so as to be opened and closed, and the free end on the other side is engaged. It is possible to engage and disengage through the attachment members, and the temporary fastening hooks are formed on the outer peripheral surfaces of the both side cover members, and the partition walls are provided at both ends on the inner peripheral surface of the both side cover members. In other words, a material filled with an insulating sealant such as an insulating admixture or an insulating putty having flexibility is disclosed (see JP-A-11-136829).

The conventional insulating cover constructed as described above is temporarily held in a semi-open manner by using the elasticity of the hinge between the gripping pieces of the indirect live wire gripping tool such as a yatco on both sides. While tightening, apply the insulation seal material to the exposed part of the core wire of the overhead electric wire, and close the gripping piece to fix the cover members on both sides in a watertight manner with the engaging members. It is supposed to be attached by caulking.

Japanese Patent Laid-Open No. 11-136829

By the way, the conventional insulation cover configured as described above is installed by operating the indirect live wire gripping tool and temporarily holding and holding the pair of cover members on both sides in a semi-open manner between the gripping pieces. Therefore, it is difficult to properly hold the gripping posture, gripping force, or expansion angle of the both-side cover members to be gripped. For this reason, the work of attaching the insulating cover is very troublesome and time-consuming, and not only the work efficiency is extremely poor but also highly skilled.

The present invention solves the problems of the prior art, and can be easily and quickly and surely attached to an overhead electric wire while properly expanding and properly grasping the insulating cover, for an insulating cover. It is intended to provide an installation tool.

In order to achieve the above object, according to the first aspect of the present invention, an insulating operating rod connecting bracket is attached to the lower end portion of the fixed grip piece which is substantially U-shaped, and the upper end portion is substantially downward L-shaped. A movable gripping piece with a working rod having a shape is pivotally mounted via an urging member, and an insulative insulating cover is formed downwardly between the fixed gripping piece and the movable gripping piece. The gist of the mounting tool for an insulating cover is that the movable gripping piece is rotated downward while being gripped, and the insulating cover is closed to be attached to the overhead electric wire.

According to the second aspect of the present invention, an approximately D-shaped adjusting plate is rotatably mounted on the back wall of the fixed gripping piece via a rotation restricting member so as to adjust the gripping diameter by moving it inward and outward. The gist of the attachment tool for an insulating cover according to claim 1 is characterized in that.

The invention according to claim 3 is characterized in that an uneven surface portion is formed on the inner surface of the movable gripping piece so as to abut against and lock the outer peripheral surface of the insulating cover. -The gist of the mounting tool.

The invention according to claim 4 is characterized in that a rotation restricting member is attached to the top wall of the fixed gripping piece so as to adjust the opening angle of the movable gripping piece. The gist of the installation tool.

The invention according to claim 5 is characterized in that the non-slip member is attached to the inner surface of the bottom wall of the fixed gripping piece, and the gist of the installation tool for an insulating cover according to claims 1 to 4. .

Since the invention according to claim 1 is configured as described above, the insulating operation rod is connected to the connection fitting, and the expanded insulating cover is formed downwardly between the fixed gripping piece and the movable gripping piece. The movable gripping piece can be rotated downward by an insulating operation rod etc. via the operating rod, and the insulating cover can be closed and attached to the overhead electric wire through the operating rod. In comparison, the insulation cover can be easily and quickly and reliably attached to the overhead electric wire while being properly expanded and securely gripped.

Since the invention according to claim 2 is configured as described above, the adjusting plate can be appropriately rotated to be protruded and retracted in the fixed gripping piece so that the gripping diameter in the fixed gripping piece can be freely adjusted. Thus, the mounting operation can be performed while securely gripping the large and small insulating covers having different diameters.

Since the invention according to claim 3 is configured as described above, the outer peripheral surface of the insulating cover can be brought into contact with and locked to the uneven surface portion of the inner surface of the movable gripping piece. It is possible to perform the mounting work while securely gripping −.

Since the invention according to claim 4 is configured as described above, the opening angle of the movable gripping piece can be freely adjusted by the rotation restricting member according to the diameter of the insulating cover, As a result, the mounting operation can be performed while securely gripping the large and small insulating covers having different diameters.

Since the invention according to claim 5 is configured as described above, the slipping of the insulating cover can be effectively prevented by the anti-slip member, and as a result, the insulating cover can be securely gripped. It is possible to carry out the mounting operation.

It is a perspective view which shows one Example of this invention. It is a front view of FIG. It is the A section expanded sectional view of FIG. It is the B section expanded sectional view of FIG. It is the C section expanded sectional view of FIG. It is a partially broken enlarged plan view of FIG. It is sectional drawing which follows the II line | wire of FIG. It is a front view which shows the large diameter insulation cover 31a. It is sectional drawing which shows the use condition which hold | gripped the large diameter insulation cover 31a. It is sectional drawing which shows the use condition which closed the large diameter insulation cover 31a and attached to the overhead electric wire 40. FIG. It is sectional drawing which shows the use condition which clamped the small diameter insulation cover 31b. 3 is a cross-sectional view showing a use state in which a small-diameter insulating cover 31b is attached to an overhead electric wire 40. FIG.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail based on one Example shown on drawing.

1 to 7 show an embodiment of the present invention. In the figure, 1 is a substantially U-shaped fixed gripping piece having a required width and height, and 2 is an insulating operation rod 37 which will be described later. A connection fitting 3 attached to the lower end portion of the fixed grip piece 1 for connection, 3 is a fixed grip piece 1 for mounting an adjusting plate 5 described later.
A vertically long mounting hole 5 formed in the center of the back wall 4 of the back and forth 4 is rotatably fitted to the mounting hole 3 via a shaft 6 so as to move in and out of the fixed gripping piece 1 and adjust its gripping diameter. A substantially D-shaped adjusting plate that is axially attached, 7 is a required number of engaging recesses formed on the same circumference of the adjusting plate 5, and 8 is engaged with the engaging recess 7 to adjust the adjusting plate 5. Is a ball plunger screwed to the back wall 4 through a screw hole 9 so that the ball plunger 8 is screwed into the screw hole 9. A body 10 and a lock ball 12 urged and held in the direction of the engagement recess 7 by an urging spring 11 in the cylindrical body 10 are constituted.

Reference numeral 13 denotes an anti-slip sheet secured to the inner surface of the bottom wall 14 of the fixed gripping piece 1 to prevent slipping during gripping of the insulating covers 31a and 31b described later. Reference numeral 15 denotes a movable gripping piece 17 described later. A mounting portion formed in a notch on the top wall 16 of the fixed gripping piece 1 so as to be movable.
7 is a substantially downward L-shaped movable gripping piece pivotally fitted to the mounting portion 15 via a shaft 18 with a set screw 19, and 20 is an inner wall surface of the mounting portion 15. An urging spring 21 wound around the shaft 18 so as to prevent the rotating operation due to its own weight by being pressed against the upper end of the movable gripping piece 17 so as to be positioned on the distal end side of the top wall 16 of the fixed gripping piece 1 Engaging recess formed in the
Reference numeral 22 denotes an index plunger that engages with the engagement recess 21 and restricts the upward rotation of the movable gripping piece 17. The index plunger 22 is screwed into the top wall 16 side of the fixed gripping piece 1 through a screw hole 23. The attached hollow screw body 24, the lock pin 25 with a knob inserted in the screw body 24 so as to be able to advance and retreat to be engaged with the engagement recess 21, and the lock pin 25 is urged toward the engagement recess 21. The urging spring 26 is configured to be pressed. 27 is an insulating cover 31a described later.
An uneven surface portion formed on the inner surface of the movable gripping piece 17 to be brought into contact with and locked to the outer peripheral surface of 31b, and 28 is an uneven surface portion 27 for engaging an engaging portion of an insulating cover 31a and 31b described later. A latching portion 29 formed in a notch at the front edge of the actuator, 29 is an operating rod screwed upright on the top wall of the movable gripping piece 17 to rotate, and 30 is attached to the tip of the operating rod 29. Ring.

In addition, reference numeral 31a denotes a large-diameter insulating cover, and the insulating cover 31a is connected to one side of a substantially semi-cylindrical cover member 32 which is a pair on both sides via a hinge 33 so as to be opened and closed. The free end of the other side is freely engageable through the engagement piece 34 and the engagement hole 35, and a flexible insulating seal member 36 is filled at a required position in the both side cover members 32. (See FIG. 8). 3
1b is an insulating cover having the same shape with a small diameter, 37 is an insulating operation rod which can be freely connected to the fixed gripping piece 1 via the connection fitting 2, and 38 is connected to the ring 30 via the operating rod 29. Insulating operation rod 40 with a hook 39 for rotating the movable gripping piece 17, and 40 an aerial wire.

Next, the operation of the embodiment configured as described above will be described with reference to FIGS.
First, after the insulating operating rod 37 is connected to the fixed gripping piece 1 via the connection fitting 2, the gripping diameter of the fixed gripping piece 1 and the movable gripping piece 1 according to the size of the insulating covers 31a and 31b to be attached.
Adjust the angle of 7.
That is, when the insulating cover 31a has a large diameter, as shown in FIG. 9, the adjustment plate 5 is stopped outwardly by the ball plunger 8 to increase the gripping diameter of the fixed gripping piece 1. The lock pin 25 of the index plunger 22 is pulled outward, and the engagement recess 2 is adjusted.
1 is released, and the movable gripping piece 17 is rotated upward to set the opening angle to a large value. After that, while the insulating cover 31a is expanded downward at a required angle, one cover member 32 is brought into contact with the inner surface of the fixed gripping piece 1 through the non-slip sheet 13 and the other cover member 32 is brought into contact therewith. The cover member 32 is brought into contact with the uneven surface portion 27 on the inner surface of the movable gripping piece 17, and the insulating cover 31 a is gripped between the fixed gripping piece 1 and the movable gripping piece 17 so as to expand downward. Next, the insulation cover 31a is approached to the required overhead wire 40 while operating the insulation operation rod 37, and the insulation seal member 36 in the cover member 32 is fitted over the required portion of the overhead wire 40 so as to fit externally. At the same time, while the hook 39 is hooked on the ring 30, the operating rod 29 is operated downward by the insulating operation rod 38, and in conjunction with this, the movable gripping piece 17 is rotated downward and closed. Then, as shown in FIG. 10, the engaging pieces 34 are attached by engaging with the corresponding engaging holes 35 and engaging and locking them in a watertight manner.

Conversely, when the insulating cover 31b has a small diameter, as shown in FIG. 11, the adjustment plate 5 is stopped inwardly by the ball plunger 8 so that the gripping diameter of the fixed gripping piece 1 is reduced. At the same time, the lock pin 25 of the index plunger 22 is engaged with the engagement recess 21 to set the opening angle of the movable gripping piece 17 to a predetermined angle. After that, insulation cover-3
While expanding 1b to a required angle, one cover member 32 is brought into contact with the protruding adjustment plate 5 in the fixed gripping piece 1 via the non-slip sheet 13, and the other cover member 32 is also provided. Is brought into contact with the uneven surface portion 27 on the inner surface of the movable gripping piece 17, and the insulating cover 31 b is gripped between the fixed gripping piece 1 and the movable gripping piece 17 so as to expand downward. Next, the insulation cover 31 b is approached to the required overhead wire 40 while operating the insulation operation rod 37, and the insulation seal material 36 in the cover member 32 is externally fitted to the required location of the overhead wire 40. At the same time, while the hook 39 is hooked on the ring 30, the operating rod 29 is operated downward by the insulating operation rod 38, and in conjunction with this, the movable gripping piece 17 is rotated downward and closed. Then, as shown in FIG. 12, the engagement piece 34 is attached by engaging with the corresponding engagement hole 35 and engaging and locking it in a watertight manner.

In addition, when attaching the insulating covers 31a and 31b to the overhead electric wire 40 as described above,
The operating rod 29 is connected to the connecting fitting 2 while the insulating covering rods 31a and 31b are securely gripped downwardly between the fixed gripping piece 1 and the movable gripping piece 17 while the insulating operating rod 37 is connected to the connection fitting 2.
The movable gripping piece 17 is rotated downward by the insulating operation rod 38 or the like through the insulating cover 31.
Since a.31b can be closed and attached to the overhead wire 40, compared to the conventional example, the insulation covers 31a and 31b can be appropriately expanded and securely attached to the overhead wire 40. It can be installed easily, quickly and reliably. Further, since the adjusting plate 5 can be appropriately rotated and moved up and down in the fixed gripping piece 1 so that the gripping diameter in the fixed gripping piece 1 can be freely adjusted, large and small insulating covers 31a having different diameters can be used. Since not only can 31b be securely held, but also the outer peripheral surfaces of the insulating covers 31a and 31b can be brought into contact with and locked to the concavo-convex surface portion 27 on the inner surface of the movable gripping piece 17, the insulating cover
31a and 31b can be securely gripped, and the opening angle of the movable gripping piece 17 can be freely adjusted by the index plunger 22 in accordance with the diameter of the insulating cover 31a and 31b. Insulation covers 31a and 31b with different diameters
It is possible to perform the mounting operation while securely grasping. Furthermore, the slippage of the insulating covers 31a and 31b can be effectively prevented by the anti-slip sheet 13, and as a result, the mounting operation can be performed while securely gripping the insulating covers 31a and 31b. It is possible.

In the above embodiment, the ball plunger 8 as the rotation restricting member of the adjusting plate 5, the urging spring 20 as the urging member of the movable gripping piece 17, the index plunger 22 as the rotation restricting member of the movable gripping piece 17, and the sliding The anti-slip sheet 13 is shown as a stop member,
However, the present invention is not limited to this, and other known rotation regulating members, urging members, rotation regulating members, or anti-slip members can be adopted and used.

DESCRIPTION OF SYMBOLS 1 Fixed grip piece 2 Connection metal fitting 5 Adjustment board 8 Ball plunger 13 Non-slip sheet | seat 17 Movable grip piece 20 Energizing spring 22 Index plunger 27 Uneven surface part 29 Actuating bar 31a / 31b Insulation cover
37 Insulation operation rod 40 Overhead electric wire

Claims (5)

An insulating operating rod connecting bracket is attached to the lower end of the substantially gripping fixed gripping piece, and a movable gripping piece with an actuating rod having a substantially downward L shape is attached to the upper end of the fixing gripping piece via a biasing member. The movable gripping piece is pivoted downward while the expanding insulating cover is gripped downwardly between the fixed gripping piece and the movable gripping piece. A mounting tool for an insulating cover, which is configured to be attached to an overhead electric wire by closing the door. A substantially D-shaped adjusting plate is rotatably mounted on the back wall of the fixed gripping piece via a rotation restricting member so as to adjust the gripping diameter by moving in and out of the fixed gripping piece. Item 1
The installation tool for insulation covers as described. 3. A mounting tool for an insulating cover according to claim 1 or 2, wherein an uneven surface portion is formed on the inner surface of the movable gripping piece so as to abut against and lock the outer peripheral surface of the insulating cover. 4. The installation tool for an insulating cover according to claim 1, wherein a rotation restricting member is attached to the top wall of the fixed holding piece so as to adjust the opening angle of the movable holding piece. An anti-slip member is attached to the inner surface of the bottom wall of the fixed gripping piece.
The installation tool for insulating covers as described in -4.

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