JP4919063B2 - Cable drawing tool - Google Patents

Description

  The present invention relates to a cable wire drawing tool used for, for example, wire drawing work of a cable extended between utility poles.

A cable such as a communication transmission line is stretched around a spiral hanger suspended around a messenger wire with a messenger wire stretched between power poles, and the outer periphery of the messenger wire is spirally wound. As a method of extending a cable in such a spiral hanger, a cable for extending a wire is previously extended in the spiral hanger, and the cable is fixed to one end of the rope, and then the other end of the rope is used. A method of winding with an axle winch (referred to as “winch method”) and a method of drawing by pulling the cable in the spiral hanger directly with the hand of an operator (called “hand-drawing method”) are known. (For example, refer to Patent Document 1).
Japanese Patent No. 3350664

  However, in the case of the winch method, it is necessary to previously draw a rope for drawing in the spiral hanger before extending the cable, and this work requires almost the same labor as the work of the manual method. Efficiency. Moreover, in order to use an axle winch, a space for installing a winch vehicle is required, and there is a problem that it is difficult to work on a power pole along a road with a high traffic volume, for example. In the case of the hand-drawing method, since the operator directly grabs the cable by hand and pulls the cable, the worker has to rise to the utility pole and pull the cable in an unstable scaffolding state. For this reason, the scaffolding is poor and one worker cannot exert a great force, and it is necessary for a plurality of workers to go up to the utility pole and pull the cable at once, which requires a lot of manpower. In addition, there is a problem that the work itself must be performed in an unstable state.

  The present invention has been made in view of such a problem, and can be easily used on a utility pole with a poor footing, and a cable wire that can efficiently use the force with which an operator pulls the cable. The purpose is to provide a tool.

  In order to solve the above problems, a cable wire drawing tool according to the present invention for extending a cable between utility poles on which a messenger wire is stretched includes a wire suspending portion suspended from a messenger wire, a wire suspension A main body portion that is positioned below the landing portion and is swingably attached to the wire suspension portion, and a cable gripping hole that is attached to the main body portion and penetrates in the front-rear direction and is inserted into the cable. And a drive mechanism that pulls the front part of the main body part backward and pushes it forward.

  In such a cable wire drawing tool according to the present invention, the main body portion has a through hole penetrating in the front-rear direction, the drive mechanism is a pulley attached to the front portion of the main body portion in the through hole, and one end is A pulling wire configured to be detachable from the utility pole, inserted from the rear end of the through-hole and hung around the pulley, the other end being led rearward and obliquely downward, and the other end of the pulling wire It is preferable that the main body portion is pulled backward by a pulling wire and a pulley by pulling the handle backward.

  At this time, it is preferable that the drive mechanism has a rigid rod-like operation portion between the other end of the pulling wire and the handle, and the operation portion pushes the main body portion forward.

  Further, such a cable wire drawing tool according to the present invention has an upper end fixed to the wire suspension part and a lower end attached so as to be swingable with respect to the main body part, the wire suspension part and the main body part It is preferable that the taper part is formed in the lower part of the rear part of a wire suspension part.

  When the cable wire drawing tool according to the present invention is configured as described above, when the main body is pulled rearward by the drive mechanism, the main body swings downward with respect to the cable hanging portion and is inserted into the cable gripping hole. The cable is gripped by the cable gripping portion when the cable comes into contact with the front and rear ends of the cable gripping hole. Therefore, when the main body is further pulled rearward by the drive mechanism, the main body moves rearward along the messenger wire, and the cable gripped by the cable gripper can be pulled backward. On the contrary, when the main body portion is pushed forward by the drive mechanism, the cable gripping state by the cable gripping portion is released, so that the cable extending tool can be moved forward with respect to the cable and the messenger wire. That is, by repeating these operations, the cable can be pulled backward. Moreover, since a cable can be extended only by the operation | movement which pulls and this pushing-out cable extension tool, it can work easily also on the utility pole with a bad scaffold.

  Further, by configuring the drive mechanism with a pulling wire and a pulley, an operator who pulls the cable wire drawing tool needs only half the force of pulling the cable, so the burden on the worker can be reduced. Furthermore, by providing an operation unit in the drive mechanism, an operation of pushing out the main body can be easily performed. In addition, by providing an operation part between the traction cable and the handle, this body part can be pushed out from the lower side away from the messenger wire, making the cable extension work easier and reducing the burden on the operator. Can do.

  In addition, the main body part is swingably attached to the wire suspension part via the connecting part, and further, the taper surface is provided at the lower part of the rear part of the wire suspension part, thereby the main body part with respect to the wire suspension part. Interference between the wire suspending portion and the main body when the oscillates can be prevented.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, the configuration of the cable drawing tool 1 according to the present invention will be described with reference to FIG. In the following description, the direction of the arrow F shown in FIG. The cable wire drawing tool 1 includes a wire suspension portion 2, a prismatic main body portion 3 that is positioned below the wire suspension portion 2 and extends in the front-rear direction, and an upper end fixed to a side surface of the wire suspension portion 2. The lower end is swingably attached to the side surface of the main body 3, and is formed in a cylindrical shape with the wire hanging portion 2 and the main body 3, and is attached to the side surface of the main body 3. And the drive mechanism 6 that pulls the main body 3 backward and pushes it forward.

  The wire suspending portion 2 has a wire holding hole 2a penetrating in the front-rear direction and a wire insertion opening 2b that opens to the side surface. The wire insertion opening 2b is connected to a lower portion of the wire holding hole 2a. Communicate. The upper part 2c of the wire holding hole 2a, that is, the upper part 2c of the wire hanging part 2 is surrounded by the upper part of the wire hanging part 2 and the left and right wall surfaces as shown in FIG. The messenger wire W inserted from 2b is held by the upper portion 2c, and the wire suspending portion 2 is configured to hang on the messenger wire W.

  The main body 3 is formed with a through-hole 3a penetrating in the front-rear direction, and a pulley 6a forming a drive mechanism 6 described later is attached to the front end side so as to be rotatable about a rotation shaft extending in the left-right direction on the front end side. The guide roller 6b is attached to the rear end side so as to be rotatable about a rotation shaft extending in the left-right direction. Further, a guide portion 3b extending downward and obliquely rearward is formed on the lower surface of the front end side of the main body portion 3. Further, the cable gripping part 5 attached to the side surface of the main body part 3 is formed with a cable gripping hole 5a extending through the front and rear.

  The drive mechanism 6 has a pulley 6a and a guide roller 6b disposed in the through hole 3a, one end fixed to the utility pole, inserted from the rear of the through hole 3a, and hung on the pulley 6a via the upper portion of the guide roller 6b. The rotated pulling wire 6c, the rod-like operation portion 6d having rigidity attached to the other end of the pulling wire 6c (folded back by the pulley 6a), and the end of the operation portion 6d And a handle 6e. The pulling wire 6c wound around the pulley 6a is configured to be guided rearward and obliquely downward through the above-described guide portion 3b.

  Then, the usage method of the cable wire drawing tool 1 comprised as mentioned above using FIGS. 2-4 is demonstrated. First, as shown in FIG. 2, the cable extending tool 1 is suspended from the messenger wire W by the wire suspending portion 2. Further, one end 6 f of the pulling wire 6 c constituting the drive mechanism 6 is attached to the utility pole P. Further, the cable C to be extended between the utility poles is inserted through the cable gripping hole 5 a of the cable gripping portion 5. 2 to 4, the spiral hanger is omitted.

  When the handle 6e is pulled rearward and obliquely downward in this state, the main body 3 is pulled downward via the pulley 6a, whereby the main body 3 is centered on the pivot point with the connecting portion 4. As shown in FIG. 3, it swings downward with respect to the connecting portion 4 and is inclined forward and obliquely downward with respect to the wire hanging portion 2. At this time, since the cable gripping portion 5 also tilts forward and obliquely downward together with the main body portion 3, the front end portion C1 of the cable C inserted into the cable gripping hole 5a abuts on the front end upper portion of the cable gripping hole 5a, and the rear The end C2 contacts the lower end of the rear end of the cable gripping hole 5a. Since such a cable C has a certain degree of rigidity, it cannot be bent greatly at the contact portions C1 and C2, and the cable C is connected to the cable C by the frictional force between the contact portions C1 and C2 and the cable gripping hole 5a. It is gripped by the grip portion 5.

  In this state, when the handle 6e is further pulled rearward, the cable extending tool 1 moves rearward along the messenger wire W, and the cable extending tool 1 moves rearward and is gripped by the cable gripper 5. The cable C is pulled backward. At this time, the force for pulling the handle 6e is half the force for pulling the cable C because the pulling cable 6c constituting the drive mechanism 6 is wound around the pulley 6a. Even if the main body 3 is inclined forward and obliquely downward, the pulling wire 6c contacts the upper portion of the guide roller 6b, so that the through hole 3a of the main body 3 does not interfere with the pulling wire. Further, by forming the taper portion 2 d at the lower part on the rear end side of the wire hanging portion 2, it is possible to prevent the swinging main body portion 3 from interfering with the wire hanging portion 2.

  After pulling the cable C backward as described above, the handle 6e is returned to the front, and when the guide portion 3b of the main body 3 is pushed forward by the operation portion 6d, the main body 3 is moved as shown in FIG. The cable gripping portion 5 swings upward, and the cable gripping portion 5 also returns substantially horizontally to the messenger wire W, and the gripping of the cable C by the cable gripping portion 5 is released. Further, when the handle 6e is pushed forward and the main body part 3 is pushed forward by the operation part 6, the cable extending tool 1 moves forward while the wire hanging part 2 slides on the messenger wire W. However, since the cable gripping portion 5 does not grip the cable C, the cable gripping portion 5 moves relative to the cable C forward. Thus, by providing the rigid rod-like operation portion 6d between the traction cable 6c and the handle 6e, the main body portion 3 can be pushed out from the lower side away from the messenger wire W. Work becomes easy.

  As described above, the cable drawing tool 1 according to the present embodiment is used, and the cable drawing tool 1 is drawn back and the pushing operation forward is repeated to draw the cable C toward the utility pole P side. The cable C can be extended between the utility poles. As described above, since the drive mechanism 6 constituting the cable wire drawing tool 1 can draw the cable C with half the force of pulling the cable C by the pulley 6a and the pulling cable 6c, the burden on the worker is reduced. Can be reduced. Further, since the cable C can be pulled only by an operation of pulling the handle 6a of the drive mechanism 6 and an operation of pushing the handle 6a forward, the cable C can be easily extended even on an electric pole with a poor scaffold.

It is a figure which shows the structure of the cable wire drawing tool which concerns on this invention, (a) is a front view, (b) is a side view (Ib-Ib sectional drawing of (a)). It is explanatory drawing for demonstrating the usage method of the said cable wire drawing tool, Comprising: It is a figure which shows the state which attached this cable wire drawing tool to the messenger wire. It is explanatory drawing for demonstrating the usage method of the said cable wire drawing tool, Comprising: It is a figure which shows the state which pulled the handle. It is explanatory drawing for demonstrating the usage of the said cable wire drawing tool, Comprising: It is a figure which shows the state which pushed out the handle | steering-wheel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cable drawing tool 2 Wire suspension part 2d Taper part 3 Main body part 3a Through-hole 4 Connection part 5 Cable holding part 5a Cable holding hole 6 Drive mechanism 6a Pulley 6c Pulling wire 6d Operation part 6e Handle W Messenger wire P Electric pole C Cable

Claims (4)

A cable drawing tool for extending a cable between utility poles with messenger wires
A wire suspension part suspended from the messenger wire;
A main body portion that is located below the wire suspension portion and is swingably attached to the wire suspension portion;
A cable gripping part attached to the main body part and formed with a cable gripping hole through which the cable is inserted through in the front-rear direction;
A cable wire drawing tool comprising a drive mechanism that pulls the front portion of the main body portion backward and pushes it forward. The main body has a through-hole penetrating in the front-rear direction;
The drive mechanism is
A pulley attached to a front portion of the main body in the through hole;
One end is configured to be attachable to and detachable from the utility pole, inserted from the rear end portion of the through hole and hung around the pulley, and the other end is pulled behind the main body portion and obliquely downward,
A handle attached to the other end of the puller wire;
The cable wire drawing tool according to claim 1, wherein the main body portion is pulled backward by the pulling wire and the pulley by pulling the handle backward. The drive mechanism has a rigid rod-shaped operation portion between the other end of the pulling wire and the handle,
The cable wire drawing tool according to claim 2, wherein the operation unit is configured to push the main body forward. An upper end is fixed to the wire suspension part, a lower end is attached so as to be swingable with respect to the main body part, and has a connection part that connects the wire suspension part and the main body part,
The cable wire drawing tool according to any one of claims 1 to 3, wherein a taper portion is formed at a lower portion of a rear portion of the wire hanging portion.

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