JP2000050446A - Self-support cable anchoring method in curved pole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify operation in a curved pole by forming an isosceles triangle with a curved pole surface as the vertex and an area between both four-face rollers as the bottom side and extending the cable at the bottom, and dividing a curve angle when stringing the cable with each four-face roller for taking each word load. SOLUTION: The central part of a roller arm body 2 where a four-side roller 3 is arranged at both end parts is connected horizontally and installed at a mounting member 1 that is clamped and installed at the curved post of an overhead wiring section. An isosceles triangle where a curved post surface is the vertex and an area between both four-side rollers 3 is the bottom side is formed, a self-support cable is stringed over the metal sheave of the entire length of the overhead wiring section including the bottom part of the isosceles triangle, and a tentative tension is applied, thus separating into a support line B and a communication line A by cutting the self-support cable neck part between both four-side rollers 3. Then, a line guard L with a specific length is wound around the support line B before being gripped by a suspension ironware, and a spiral sleeve is wound around the communication line A before the line is stringed with specific tension.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extension work of a communication line, and more particularly to a method of retaining a self-supporting cable on a curved pillar.

[0002]

2. Description of the Related Art In an overhead wire of a self-supporting cable, a pulling rope having a cable connected to a rear end thereof is passed through a group of wheels installed at each pillar between the extending wires. A drawn wire is mainly used in which the cable is wound at the end of the span and the subsequent cable is developed over the entire length of the drawn wire. In this overhead line, when there is a bend in the construction span line, the cable is fixed to the pillar by a method different from that of the other draw-through pillars in the curved pillar. First, after extending with a wheel for a curved column (FIG. 6), as shown in FIG. 7, both side supporting lines at a predetermined length from the column are gripped by a gripper, and the wheel for a curved column is removed. A cable tensioner is disposed between each gripper and the post, and the cable between the grippers is separated into a support line B and a communication line A. Thereafter, the support wire B is drawn to the suspended hardware H by the operation of the wire tensioner against the tension applied to the curved column, and the line guard L is pulled.
In this case, the support wire B wound with the wire is gripped, and a spiral sleeve is wound around a portion that may come into contact with the pillar of the communication wire A to perform treatment. Work on such curved columns is dangerous because it is performed against the tension,
In addition, since it is troublesome work such as troublesome installation of a tool and necessity of removing a wheel, a simple construction method has been desired.

[0003]

According to the present invention, in order to simplify the work on such a curved column, a four-sided roller protruding inward of the curve is disposed at a position at a predetermined distance on both sides of the curved column so that the curved column surface is apexed. To form an isosceles triangle with the base between the four rollers, extend the cable by passing the cable through the base, and divide and bear the curve angle at the time of extension by each of the four rollers. In addition to preventing damage due to bending, the fixed position on both sides of the column is fixed, and instead of the conventional gripper, it can be extended without using a wheel for curved columns and installing new tools. It enables the detention after the line.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail. In order to carry out this method, mounting member 1, roller arm 2, four-sided roller
This is carried out by means of a roller for wire drawing consisting of 3. Mounting member 1
Is provided with a chain receiving member 12 on one side of the mounting plate 11, a fastening member 14 provided with a chain 13 on the other side, and coupling holes 16 and 16 at the center, and a safety pin insertion hole 17 therebetween. And a structure in which a holding device 19 for the safety pin 18 is provided adjacent thereto. The roller arm body 2 is obtained by cutting an aluminum square pipe 21 to a predetermined length, and a reinforcing plate 22 bent in a U-shape at the center is vertically applied, and a coupling bolt 23 is penetrated, and a nut 24 is screwed. With a hole 27 corresponding to the safety pin insertion hole 17 in the center.
Form 2. Further, a fastening belt mounting plate 25 is further fastened to the connecting bolts 23 at the lower side, and a four-sided roller mounting hole is provided at both ends of the roller arm body. A fastening belt 26 provided with a buckle (not shown) at one end is inserted through the fastening belt mounting plate 25. The fastening belt is turned around a utility pole to tighten the belt arm, thereby eliminating rattling of the roller arm body. . The four-sided roller 3 is provided with vertical rollers 4 and 5 along both side plates 33 of an approximately U-shaped roller frame 32 having an opening 31 at the top, and a lower horizontal roller 6 along a bottom plate 34, Opening / closing roller 7 that opens and closes part 31
Is formed on the upper side of the side plate 33, and one side plate of the roller frame 32 is formed.
A substantially U-shaped mounting frame 35 protruding outward along 33 is provided,
It is of a structure that is attached to the roller arm body 2 with bolts 36. The opening / closing roller 7 rotates in the horizontal direction, and can open the opening 31.

[0005] To install the roller for wire drawing of the present invention,
As shown in FIG. 4, first, the mounting plate 11 of the mounting member 1 is applied to the utility pole P, and the chain 13 is turned to the utility pole.
12, the tightening handle 15 of the tightening member 14 is rotated and tightened to the utility pole P for mounting. Next, the head of a connecting bolt 23 provided at the center of the roller arm 2 to which the four-sided roller 3 has been attached in advance is fitted into the connecting hole 16 and moved to the left. Then, the safety pin 18 is attached by being fitted into the safety pin insertion hole 17 provided at the center. Then, the fastening belt 26 is turned around the utility pole P, inserted through the buckle, fastened and fixed, and the mounting is completed.

[0006] As described above, the roller for extending wire described in the embodiment is installed on the curved pillar between the predetermined spans of the extending wire, the wheel is installed on the straight pillar, and the rope is sequentially pulled from the wheel at the beginning of the span. The cable connected to the trailing end of the draw rope is extended by winding the cable with a winch below the terminal post. When the extension is completed, the cable is tightened and fixed at each column. In the curved column, the cable located between the four surface rollers of the extension roller is separated into the support line B and the communication line A. A line guard L is wrapped around the separated support line B, and is held by a suspension hardware H installed on a pillar. The communication line A is wound with a spiral sleeve to prepare for contact with the pillar surface. When this operation is completed, the extension roller is removed, the main line is cut, and the construction is completed.

[0007]

As described above, the problem in the conventional method is solved by extending the self-supporting cable by using the method and the equipment of the present invention. After performing wire drawing with a conventional wheel for curved pillars, both sides are supported by a wire gripper, and the process of removing the wheel with a wire tensioner between the wire gripper and the pillar can be eliminated. Since it is possible to respond to the final stage only by installing the line roller, it is expected that a great improvement in work efficiency and a safe work can be expected due to the nature of work at a high place on the pillar.

[Brief description of the drawings]

FIG. 1 is a front view of a wire drawing roller used in the present invention.

FIG. 2 is a right side view of a wire drawing roller used in the present invention.

FIG. 3 is a plan view of a wire drawing roller used in the present invention.

FIG. 4 is an explanatory view for attaching a wire drawing roller used in the present invention.

FIG. 5 is a plan view in which a self-supporting cable is extended and separated into a support line and a communication line.

FIG. 6 is a drawing showing a state in which a conventional curved column wheel is extended.

FIG. 7 is an explanatory view of a conventional work.

[Explanation of symbols]

 1 Mounting member 2 Roller arm body 3 Four-sided roller 4,5 Vertical roller 6 Horizontal roller 7 Opening / closing roller 11 Mounting plate 12 Chain holder 13 Chain 14 Tightening member 15 Tightening handle 16 Connection hole 17 Safety pin insertion hole 18 Safety Pin 19 Holding device 21 Aluminum square pipe 22 Reinforcement plate 23 Connecting bolt 24 Nut 25 Tightening belt mounting plate 26 Tightening belt 27 Hole 31 Opening 32 Roller frame 33 Side plate 34 Bottom plate 35 Mounting frame 36 Bolt A Communication line B Support line H Suspension hardware L Line guard P Utility pole

Claims (1)

[Claims] 1. A central part of a roller arm body 2 in which four-sided rollers 3 that open and close an upper position roller are arranged at both ends are horizontally connected to a mounting member 1 that is fastened to a curved pillar in an overhead wire section. A self-supporting cable extending over an entire span of the overhead wire section including an isosceles triangle having a curved column surface as an apex and a base between the four rollers, and a base formed by the extended rollers; After applying a temporary tension, a self-supporting cable neck portion is cut off between the four rollers 3 to separate into a support line B and a communication line A, and a line guard L of a predetermined length is attached to the support line B. A self-supporting cable anchoring method for a curved column, characterized in that a spiral sleeve is wound around a communication line A and then tightened with a predetermined tension after being wound and held by a hanging hardware H.