JPS63206106A - Camalong - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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. This is proposed in Utility Application No. 14793/1983.

However, in such a previously proposed come-along,
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. For this reason,
When the cam structure end surface of the handle head presses against the end 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 the electric wire, in the case of an optical fiber composite overhead ground wire where mi has an optical fiber built inside, for example, 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.

When the wire is moved, the total weight of the come-along itself, the block wheel attached to the end of the handle attached to the come-along, the traction wire, etc. is added to the wire, which may hinder the smooth transition and cause scratches on the surface of the wire. There is a problem with giving. In order to solve this problem, a shaft is provided in parallel to the lower body of the come-along, and a supporting device for the overhead wire is provided at both ends of the shaft, which has rollers at the top that rotate on the overhead wire. , A come-along that moves smoothly on the wire without applying excessive force to the wire inside the side has been proposed, for example, in Jitsugan Sho Go-229447.
proposed by No.

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 Problem) This provides a come-along, which is characterized by a handle attachment in which the handle head has an elongated hole formed in the end of the come-along main body via a connecting fitting connected by a pivot. A support body is attached to the support body fixed to the end of the upper body between the handle end attached to the handle attachment part and the come-along body, and is attached to the support body fixed to the upper body end so as to be movable up and down. The reason is that a support roller is provided that rotates on the electric wire that is attached.

Fig. 1 is a sketch of a specific example of the come-along according to the present invention;
The figure is a side view of the come-along of FIG. 1.

The end of the lower body (2) of the come-along is provided with a handle mounting part (10) having an elongated hole (11) formed integrally therewith. The long hole (11) is located on the same axis as the wire insertion hole formed by the wedges (3) and (4).

On the other hand, the lower part of the head of the handle (6) has a cam structure end (7tL) that presses the end face of the wedge (3) (4).
8) and the above-mentioned handle mounting part (lO) by the bottle (12)
is rotatably mounted on the The other end of the connecting part (8) is rotatably attached to one end of the second connecting fitting (9) with a pin (13), and this connecting fitting (
9) The other end is attached together with the end of the handle (6) into the elongated part (11) of the handle attachment part (10) by a pin (14).

A roller support body (23) is fixed to the end of the upper body (1) of the come-along, and a support arm is attached to this support body (23) so as to be movable up and down by a shaft having a mechanism as will be described later. (22) is provided, and a roller (2I
) is installed. In addition, (24) in the figure is a bolt that tightens the support body (23) on the come-along upper body (1) through an elongated hole provided in a vertically adjustable manner.

The roller (2nd position U (S)) is located in the elongated hole (I hole) of the handle attachment part (lO) where the end (!^) of the upper body of the come-along and the end of the handle (6) are attached. The bottle inside (
14), and this place U (S) is W2X A →
It is determined by W+xB.

Here, WI is the come-along heavy metal 1 rearward of S, such as the above-mentioned connecting fitting (9), handle attachment part (10), handle (
6), the block wheel connected to the handle, the towing wire, etc. NW2 is the total weight of the come-along main body in front of S.

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

(21) is a roller that rotates on the electric wire (20), and is rotatably attached to the support arm (22) by a roller shaft (25), and this support arm (22) is attached to the support body (23). It has been disguised. To attach the sabot 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), and attach the sabot arm (22) to the support body (23).
23) in the recess (34), and insert the key groove (226) (33^) into the keyway (226) on the left side (2[i) so as to fit the key in Part (3I) is the shaft hole (33) of the support body (23)
Insert and position so that the fitting grooves (30) of the two fit together. Next, attach the right spring (28) to the shaft (2G
) and attach the assembly cap (27) and assembly screw (29).
) to assemble. 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 (2I) upward so as not to obstruct the insertion. ) After insertion, it will be located on the wire (20) and the come-along wire (2
0) Smooth upward movement When gripping the overhead wire that passes through the inside of the wedge (3) using the above-described come-along of the present invention, pull the rope attached to the tip of the handle (G) as in the conventional method. . At this time, the pin (14) to which the end of the handle ([i) is attached is inserted into the long hole (11) of the handle attachment part (10)
) to the left.

Accordingly, the positional relationship between the first connecting part (8) and the connecting fitting (9) is opened around the pin (13), and the handle head (7)
The cam structure end face (7^) of the wedge (3) (4) presses the end face of the wedge (3) and moves it to the right side to firmly grip the overhead wire passing through the inside of the wedge (3). ) The pin (14), which serves as the base point for applying a pressing force to the end surface (7^) of the cam structure, is located at the handle attachment part which is coaxial with the wire insertion hole formed by the wedges (3) and (4), as described above. Since it moves in parallel within the long dimension (11) of (!O), the cam structure end face (7
4) The pressing force is applied only in the axial direction of the electric wire as the roller rotates on a line, so 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. Further, by installing the rollers at positions where the weight of the front and rear parts is balanced as described above, it is possible to avoid an increase in the size of the come-along.

(Effects of the Invention) As described above, according to the come-along of the present invention, the pressing force on the end face of the cam structure that moves the wedge is only in the axial direction of the electric wire, so no bending force is applied to the overhead electric wire passing through the come-along. does not work.

Further, one roller is provided at a weight balance position, and this roller rotates when the come-along moves, thereby preventing scratches on the wire surface due to the weight of the come-along, etc., and also preventing the come-along from becoming larger.

It is particularly effective.

[Brief explanation of the drawing]

Fig. 1 is a sketch of a specific example of the come-along according to the present invention;
The figure is a side view of the come-along of FIG. 1. 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. DESCRIPTION OF SYMBOLS 1... Come-along upper body, 2... Come-along lower body, 3, 4... Wedge, 6... Handle, 7... Handle head, 10... Handle attachment part, 21... Support roller, 22... Support arm, 23... Support body. 3 mouth

Claims (2)

[Claims] (1) A come-along in which the end face of a wedge inserted into the main body is pressed by the end face of the cam structure of the handle head supported by the main body and moved in the axial direction to grip an overhead electric wire passing through the inside of the wedge, The handle head and the handle end are pivotally attached to the elongated hole of the handle attachment part having an elongated hole formed in the end of the come-along main body via a connecting fitting connected by a pivot, and the handle is attached A support roller is provided between the handle end attached to the upper body of the come-along and the come-along body, and the support roller rotates on the electric wire that is attached to the support body fixed to the upper body end of the come-along so as to be movable up and down. Come along. (2) The position of the support roller is W_2×A≒W_1×B
The come-along according to claim 1, characterized in that the position is determined by . However, W_1 is the total weight of the come-along at the rear of the support roller position, and W_2 is the total weight of the come-along at the front of the support roller position.