JPH056409B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a type of device that firmly grips the overhead wire by pressing the wedge with the end surface of the cam structure of the handle head when gripping the overhead wire with a come-along wedge. It's about come-along.

(Prior Art and Problems to be Solved) For example, a come-along is configured such that when a wire is gripped by the wedge of the come-along, the wedge is pressed by the end face of the cam structure of the handle head, and the wire is forcibly and firmly gripped. It was proposed in Jitsugan No. 14793, 1983. However, in such previously proposed come-alongs, the rotation center of the handle head that presses the wedge in the axial direction is located below the center line of the wire insertion hole inside the wedge. Therefore, when the end surface of the cam structure on the handle head presses against the end surface of the wedge, a downward force is applied to the come-along, and a bending force is applied to the electric wire passing through the inside of the wedge at its exit. . When such a force acts on an electric wire, in the case where the electric wire has an optical fiber built-in, such as an optical fiber composite overhead ground wire, a bending force is applied to the optical fiber, and the transmission of the optical fiber is There is a problem that the characteristics deteriorate.

In addition, when moving a come-along over an overhead power line, the total weight of the come-along itself, the block safe attached to the end of the handle attached to the come-along, the towing wire, etc. is added to the wire, so the transition is smooth. There is a problem in that it obstructs the wire and damages the surface of the wire. In order to solve this problem, a shaft is provided in the lower body of the come-along in parallel with the shaft, and a support device for the overhead wire is provided at both ends of the shaft, which has rollers on the top that rotate on the overhead wire. Therefore, the come-along, which moves smoothly on the wire without applying excessive force to the wire inside the wedge, was developed, for example, in the 1980s.
Proposed by No. 229447.

However, since such a come-along is provided with a supporting device for the electric wire having rollers at the front and rear of the main body, there are problems in that the entire come-along is long and heavy.

(Means for Solving the Problems) The present invention provides a come-along that solves the above-mentioned problems at once.The main feature of the present invention is that the come-along main body is composed of a combination of two members, an upper main body 1 and a lower main body 2. A handle attachment fitting 10 of two parallel plate-like members 10a and 10b integrally formed and protruding from the end of the lower body 2 is connected to the elongated hole 11 provided in the fitting 10 and the come-along body. The handle mounting bracket 10 is provided with a handle head 7 having a cam structure end face 7a attached to the pin. The other end of the connecting fitting 9, which is connected to the lower connecting part 8 of the handle head 7 by a pivot 13, is connected to the handle attachment fitting together with the handle end 6a. The support body 23 is attached to one pin 14 that moves within the elongated hole 11 of 10, and is further fixed to the end of the come-along upper body 1.
A support arm 22 is attached to a support arm 22 so as to be able to move in an arc around a shaft 26 that passes through it, and a support roller 21 that rotates on the electric wire is provided on the support arm 22.

(Example) FIG. 1 is an overall sketch of a specific example of a come-along according to the present invention, and FIG. 2 is a side view of the come-along shown in FIG. 1.

The come-along body consists of a combination of two members, an upper body 1 and a lower body 2. A handle attachment fitting 10 is provided at the end of the lower main body 2, protruding from the end and consisting of two integrally formed parallel plate members 10a and 10b. The handle attachment fitting 10 is provided with a long hole 11 in the longitudinal direction of the metal fitting, and this long hole 11 is the same as the gripping hole of the overhead electric wire 20 formed by the wedges 3 and 4 inserted inside the come-along main body. located on the axis.

A handle head 7 having a cam structure end face 7a for pressing the end faces of the wedges 3 and 4 is mounted on the handle attachment fitting 10 by a pin 12 so as to be rotatable about the handle head 7 as an axis. A connecting fitting 9 is connected to the lower connecting part 8 of the handle head 7 by a pivot 13, and the other end of the connecting fitting 9 is connected to the lower connecting part 8 of the handle head 7, and the other end of the connecting fitting 9 is connected to the lower connecting part 8 of the handle head 7.
It is attached to a single pin 14 that moves within the elongated hole 11 of the handle attachment fitting 10.

Further, a support body 23 of a support roller 21 is fixed to the end of the upper body 1 of the come-along, and a support arm 22 is provided on this support body 23 so as to be movable in an arc by a shaft 26 having a mechanism to be described later. A support roller 21 that rotates on the electric wire 20 is attached to one end thereof. It is desirable that the support roller 21 be installed at the center of gravity of the entire come-along.

FIG. 3 is a left side view of the roller 21 portion in FIG. 2, and FIG. 4 is a left side view of the roller support body 23 in FIG.
It is an explanatory view of the constituent parts of.

Reference numeral 21 denotes a roller that rotates on the electric wire 20, and is rotatably attached to a support arm 22 by a roller shaft 25, and this support arm 22 is attached to a support body 23. To attach the support arm 22 to the support body 23, align the through hole 22a of the support arm 22 with the through hole 33 of the support body 23, position it in the recess 34 of the support body 23,
Insert and position so that the key of the left shaft 26 fits into b, 33a, and the fitting part 31 of the shaft 26 fits into the fitting groove 30 of the shaft hole 33 of the support body 23. Next, the right spring 28 is attached to the shaft 26 and assembled using the assembly cap 27 and assembly screws 29.
In such a configuration, when the electric wire 20 is inserted into the come-along wedges 3 and 4, the spring 28 flips up the roller 21 upward so as not to obstruct the insertion, and after the electric wire 20 is inserted, the spring 28 is positioned above the electric wire 20, To smoothly move a come-along on an electric wire 20. In addition, in FIG. 3, 24 indicates the support body 23 on the come-along upper body 1;
This is a bolt that is tightened through a long hole that can be adjusted vertically.

(Function) By the come-along of the present invention described above, the wedges 3 and 4
When grasping an overhead electric wire passing through the interior, the rope attached to the tip of the handle 6 is pulled as in the conventional case.
At this time, the pin 14 to which the end 6a of the handle 6 is attached moves to the left within the elongated hole 11 of the handle attachment fitting 10. Along with this, the positional relationship between the connecting part 8 of the grip head 7 and the connecting fitting 9 opens around the pin 13, and the cam structure end surface 7a of the grip head 7 presses the end surfaces of the wedges 3 and 4 and moves to the right. and firmly grasp the overhead power lines that pass through it. At this time, as described above, the pin 14, which is the base point for applying a pressing force to the cam structure end surface 7a of the handle head 7, is connected to the wedges 3, 4 as described above.
Since the cam structure moves in parallel within the elongated hole 11 of the handle attachment part 10, which is on the same axis as the wire insertion hole formed by the cam structure, the pressing force of the cam structure end surface 7a is only in the axial direction of the wire, and no bending force is applied to the wire. .

Further, when the come-along moves on the electric wire, the roller rotates on the electric wire, so that no large force is applied to the electric wire due to the weight of the come-along body or other parts, so the surface of the electric wire is not damaged. Furthermore, by installing the rollers at positions where the front and rear weights are balanced as described above, it is possible to avoid an increase in the size of the come-along.

(Effect of the invention) As described above, according to the come-along of the present invention,
Since the pressing force of the end face of the cam structure that moves the wedge is a force only in the axial direction of the electric wire, no bending force acts on the overhead electric wire passing through the cam-along.

In addition, one roller is provided at the center of gravity of the entire come-along, and this roller rotates when the come-along moves, which prevents scratches on the wire surface due to the weight of the come-along, etc., and also prevents the come-along from becoming larger. .

Therefore, it is particularly effective as a come-along for an optical fiber composite overhead ground wire, such as an overhead ground wire incorporating an optical fiber.

[Brief explanation of the drawing]

FIG. 1 is a sketch of a specific example of the come-along according to the present invention, and FIG. 2 is a side view of the come-along shown in FIG. 3 is a left side view of the roller portion in FIG. 2, and FIG. 4 is an explanatory diagram of the roller attachment parts. 1... Come-along upper body, 2... Come-along lower body, 3... Upper wedge, 4... Lower wedge, 6
...Handle, 7...Handle head, 10...Handle mounting bracket, 11...Elongated hole, 21...Support roller, 2
2...Support arm, 23...Support body.

Claims (1)

[Claims] 1. Attachment of a handle of two parallel plate-like members 10a and 10b integrally formed and protruding from the end of the lower body 2 of the come-along body formed by a combination of two members, the upper body 1 and the lower body 2. A metal fitting 10 has an elongated hole 11 provided in the metal fitting 10 and wedges 3 and 4 inserted into the come-along main body.
The handle attachment fitting 10 has a handle head 7 having a cam structure end surface 7a located on the same axis as the overhead wire 20 gripping hole formed by the pin 1.
2, and the other end of the connecting fitting 9 connected to the lower connecting part 8 of the handle head 7 by a pivot 13 connects to the handle end 6.
A, the shaft 26 is attached to a pin 14 that moves within the elongated hole 11 of the handle attachment fitting 10, and further passes through the support body 23 fixed to the end of the come-along upper body 1. A support roller 21 that rotates on the electric wire is attached to a support arm 22 that is mounted so as to be able to move in a circular arc.
Come-along is characterized by being provided with.