JP2007253632A - Pulley type tension balancer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulley type tension balancer preventing a balancing device, a pulley, a draw wire, a suspension wire or an overhead line from being broken or damaged due to an excessive shock or load on the members accompanied by very strong vibration of a weight. <P>SOLUTION: This balancer 1 is provided with an arm 2 having a base end side locked on a stringing pole P, large pulley 4 and small pulley 5 having a common pulley shaft 3 journaled at a distal end of the arm 2, the draw wire 6 having one end side wound on the small pulley 5 and the other end side connected to the overhead line T like a trolley wire, and the suspension wire 8 having one end side wound on the large pulley 4 and supporting the weight 7 on the other end side. The weight 7 is elevatably held by the balancing device 9 supported on the stringing pole P. A shock-absorbing member 10 constituted by incorporating a spring 11 and a damper 12 in parallel is interposed between the draw wire 6 and the overhead line T. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pulley-type tension balancer that supports an end of an overhead wire such as a trolley wire while maintaining a predetermined tension with respect to a structure. This invention relates to a pulley-type tension balancer that prevents the breaker, pulley, puller wire, suspension wire or overhead wire from being broken or damaged.

As a pulley-type tension balancer for holding a trolley wire, one described in Patent Document 1 is known. A pulley-type tension balancer supports a pulley shaft that fixes a small and large pulley at the tip of an arm locked to an overhead pole, and a trolley wire is connected to a puller wire wound around the small pulley via a retaining yoke. The weight is supported by a suspension wire that is locked and wound around a large pulley. The weight is held up and down by a shaking device.
JP 2005-225423 A

In the conventional pulley-type tension balancer, when an earthquake or the like occurs and the weight vibrates up and down vigorously, it may collide with the vibration prevention device and break it. In addition, if an impulse-like load is applied to the wire along with the vibration of the weight, the wire or overhead wire may break or the pulley may be damaged.
Accordingly, the present invention provides a pulley-type tension that prevents the members from being broken or damaged due to excessive impact or load on the bracing device, pulley, puller wire, suspension wire or overhead wire due to heavy vibration of the weight. The challenge is to provide a balancer.

In order to solve the above-described problems, in the pulley-type tension balancer 1 according to the present invention, an impact buffer member 10 in which a spring 11 and a damper 12 are incorporated in parallel is interposed between the puller wire 6 and the overhead wire T. The
Further, in the pulley-type tension balancer 1 according to the present invention, an impact buffer member 13 in which a spring 14 and a damper 15 are incorporated in parallel is interposed between the suspension wire 8 and the weight 7.
In the pulley-type tension balancer according to the present invention, the dampers 12 and 15 can be constituted by oil dampers or friction dampers.

  In the pulley-type tension balancer according to the present invention, the shock buffer member suppresses rapid vibration of the weight and rapid change in tension to prevent damage to each part of the tension balancer body or breakage of the overhead wire.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view of a pulley-type tension balancer according to the present invention, and FIG. 2 is a schematic front view of another embodiment of the pulley-type tension balancer according to the present invention.

  In FIG. 1, a pulley-type tension balancer 1 includes an arm 2 whose proximal end is locked to an overhead pole P, and a large pulley 4 and a small pulley 5 that are supported by a common pulley shaft 3 at the tip of the arm 2. One end side is wound around this small pulley 5 and the other end side is connected to an overhead wire T such as a trolley wire, and one end side is wound around the large pulley 4 and a weight 7 is provided at the other end side. The suspension wire 8 is supported. The weight 7 is held up and down by a swinging device 9 supported by the overhead pole P.

  An impact buffer member 10 is interposed between the puller wire 6 and the overhead wire T. The shock absorbing member 10 is formed by incorporating a spring 11 and a damper 12 in parallel. The damper 12 generates a viscous damping force proportional to the distance, and can be constituted by a known oil damper or friction damper.

  In the embodiment shown in FIG. 2, an impact buffer member 13 is interposed between the suspension wire 8 and the weight 7. The shock absorbing member 13 is constructed by incorporating a spring 14 and a damper 15 in parallel as in the previous embodiment. Although not shown in the figure, a configuration having the shock absorbing member 10 shown in FIG.

  In the pulley-type tension balancer of any of the above-described embodiments, the shock absorbing members 10 and 13 suppress the sudden vibration of the weight 7 and the accompanying rapid change in the tension of the wire and overhead wire, thereby preventing the swinging device. 9. Prevents damage to each part of the tension balancer body such as the pulleys 4 and 5 or breakage of the overhead wire T.

  The present invention is used as, for example, a pulley-type tension balancer that supports a trolley wire.

1 is a schematic front view of a pulley-type tension balancer according to the present invention. It is a schematic front view of other embodiment of the pulley-type tension balancer which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pulley-type tension balancer 2 Arm 3 Pulley shaft 4 Large pulley 5 Small pulley 6 Pulling wire 7 Weight 8 Suspension wire 9 Damping device 10 Shock absorbing member 11 Spring 12 Damper 13 Shock absorbing member 14 Spring 15 Damper P Overhead pillar T Overhead line

Claims (4)

An arm whose base end is locked to the overhead pole, a large pulley and a small pulley supported on a common pulley shaft at the tip of the arm, and one end wound around the small pulley and the other end connected to the overhead wire A pulley-type tension balancer comprising: a puller wire that is wound; and a suspension wire that has one end wound around the large pulley and supports a weight on the other end.
A pulley-type tension balancer in which an impact buffering member in which a spring and a damper are incorporated in parallel is interposed between the puller wire and the overhead wire. An arm whose base end is locked to the overhead pole, a large pulley and a small pulley that are pivotally supported by a common pulley shaft at the tip of the arm, and one end wound around the small pulley and the other end connected to an overhead line. A pulley-type tension balancer comprising a puller wire and a suspension wire having one end wound around the large pulley and supporting a weight on the other end.
A pulley-type tension balancer in which an impact buffering member in which a spring and a damper are incorporated in parallel is interposed between the suspension wire and the weight.   The pulley-type tension balancer according to claim 1 or 2, wherein the damper is an oil damper.     The pulley-type tension balancer according to claim 1 or 2, wherein the damper is a friction damper.

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