JP2008168823A - Tension balancer for aerial line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tension balancer for an aerial line rather simply structured, requiring no frequent maintenance and inspections, easy to take measure against vibration, and easy to adapt to the interference thereof with a peripheral member. <P>SOLUTION: This tension balancer 1 comprises a bearing frame 2 fixed onto an aerial line column 21, a lever 3 pivotally supported on the bearing frame 2, and a weight 4 connected to the lever 3. The bearing frame 2 is fixed to the aerial line column 21 in the extension direction of the aerial line 21. The lever 3 comprises a main arm 3b connected to the aerial line 22 and a weight arm 3c connected to a weight, and is pivotally supported on the bearing frame 2 through a horizontal shaft 6. The weight arm 3c extends to the opposite side of the extension direction of the aerial line 22 through the side of the aerial line column 21, and connects the weight 4 to the end thereof. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tension balancer that supports an end portion of an overhead wire such as a trolley wire while maintaining a predetermined tension with respect to an overhead wire column.

Overhead lines, especially train lines (suspended / auxiliary suspended / trolley lines), slackness due to expansion / contraction due to temperature changes, elastic elongation due to creep and trolley line wear, and inclination of the support over time Since the tension is affected, it is necessary to keep the tension constant. As an automatic tension adjusting device capable of constantly maintaining this tension, a pulley-type tension balancer and a spring-type tension balancer are known.
A pulley-type tension balancer for securing a trolley wire is supported by a pulling wire wound around a small pulley by pivotally supporting a pulley shaft that fixes a large and small pulley at the tip of an arm locked to an overhead pole. The trolley wire is locked via the suspension, and the weight is supported by the suspension wire wound around the large pulley (see, for example, Patent Document 1).
The spring tension balancer has a built-in coil spring and includes an outer cylinder that is attached to the fixed side such as an overhead pole, and an inner cylinder that is inserted into the outer cylinder and attached to the train line side, and extends and contracts the train line. Accordingly, a certain tension is applied to the train line using the elasticity of the coil spring (see, for example, Patent Document 2).
JP 2005-225423 A JP-A-9-33201

The conventional pulley-type tension balancer has a relatively complicated structure and requires frequent wire maintenance and inspection. In addition, it is necessary to consider measures against vibration of the weight and interference with peripheral members accompanying the vertical movement of the weight. The spring tension balancer has a relatively complicated structure, and it is necessary to cope with a decrease in performance due to sliding of the spring and aged deterioration.
Accordingly, it is an object of the present invention to provide an overhead wire tension balancer that has a relatively simple structure, does not require frequent maintenance inspections, and is easy to cope with vibrations and interference with peripheral members.

  In order to solve the above problems, the present invention includes a bearing frame 2 fixed on the overhead pole 21, a lever 3 pivotally supported on the bearing frame 2, and a weight 4 connected to the lever 3. Thus, an overhead wire tension balancer 1 is constructed. The bearing frame 2 is fixed to the extending direction side of the overhead wire 22 in the overhead wire column 21. The lever 3 has a main arm 3 b connected to the overhead wire 22 and a weight arm 3 c connected to the weight, and is supported by the bearing frame 2 by the horizontal shaft 6. The weight arm 3c extends through the side portion of the overhead wire column 21 to the side opposite to the direction in which the overhead wire 22 extends, and connects the weight 4 to the tip portion.

  The tension balancer according to the present invention has an effect that the structure is simple, maintenance and inspection are easy, vibration countermeasures, and response to interference with peripheral members are easy.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a tension balancer according to the present invention, and FIG. 2 is a plan view of the tension balancer according to the present invention.

  1 and 2, the tension balancer 1 includes a bearing frame 2 fixed on the overhead pole 21, a lever 3 pivotally supported on the bearing frame 2, and a weight 4 connected to the lever 3. .

The bearing frame 2 is fixed by a band metal fitting 5 on the extending direction side of the overhead wire 22 in the overhead wire column 21 and has a pair of opposed brackets 2a.

  The lever 3 includes a pair of opposed lever plates 3 a and includes a main arm 3 b connected to the overhead wire 22 and a weight arm 3 c connected to the weight 4. The lever 3 is pivotally supported between the brackets 2a and 2a of the bearing frame 2 by the horizontal shaft 6 in the pivot portion 3d. Both arms 3b and 3c extend at a mutual angle slightly larger than 90 ° from the pivot 3d. The main arm 3b extends upward substantially parallel to the overhead wire column 21. The weight arm 3c passes through the side of the overhead wire column 21 and extends to the side opposite to the direction in which the overhead wire 22 extends, and the weight 4 is connected to the tip.

  In the illustrated embodiment, the lever plate 3 a constituting the weight arm 3 c is pivotally supported by the horizontal shaft 6 on the brackets 2 a and 2 a with a mutual space larger than the diameter of the overhead pole 21. The portions constituting the weight arm 3c of the lever plate 3a pass through the side of the overhead wire column 21 and extend to the opposite side to the extending direction of the overhead wire 22, and mutually on the opposite side of the extending direction of the overhead wire 22. And the weight 4 is connected to the tip. The portion constituting the main arm 3b of the lever plate 3a extends upward, bends so as to approach each other at the upper portion, and the overhead wire 22 is connected to the tip portion.

  In the embodiment shown in FIGS. 1 and 2, the mutual angle θ of the main arm 3b and the weight arm 3c = 95 °, the length L1 of the weight arm 3c = 1500 mm, the length L2 of the main arm 3b = 750 mm, the weight In the initial state in which the weight W is 1500 kg and the main arm 3b is arranged vertically, the traction force F with respect to the overhead wire 22 is 3011 kg. The movement stroke X of the overhead wire 22 from the initial state (the leftward movement in the figure is normal) The relationship between the traction force F and the traction force F is as shown in the chart of FIG. 3 (vertical axis: traction force F, horizontal axis: stroke X). Although a substantially constant traction force is obtained, the traction force increases as the overhead wire 22 moves to the left, and the flow phenomenon of the overhead wire 22 is suppressed.

  The tension balancer of this embodiment has a substantially constant traction force and a flow prevention function while having a simple structure. Maintenance and inspection are easy because the structure is simple. It is not necessary to take measures against vibration and to deal with interference with peripheral members as in a pulley-type tension balancer using a wire. Since the weight 4 is disposed on the opposite side of the overhead wire 22 from the support portion of the overhead wire 22, loads on the overhead wire 21 and the bearing frame 2 are reduced.

It is a front view of the tension balancer concerning the present invention. It is a top view of the tension balancer concerning the present invention. It is a graph which shows the relationship between the stroke and tractive force of the tension balancer which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tension balancer 2 Bearing frame 3 Lever 3a Lever plate 3b Main arm 3c Weight arm 3d Pivoting part 4 Weight 21 Overhead pole 22 Overhead wire

Claims (2)

A bearing frame fixed on the extending direction side of the overhead wire on the overhead pole, a lever pivotally supported by the bearing frame and connected to the overhead wire, and a weight connected to the lever;
The lever is pivotally supported on the bearing frame by a horizontal shaft at the pivot, extends from the pivot and is connected to the overhead wire at the distal end, and is connected to the weight at the distal end. A weight arm that is
The weight arm extends from the pivot portion to a side opposite to the extending direction of the overhead wire, passes through the side of the overhead wire column, and is positioned on the opposite side of the overhead wire from the extending direction of the overhead wire. An overhead wire tension balancer, wherein the weight is connected to a tip portion.   The lever comprises a pair of parallel lever plates pivotally supported on the bearing frame by a horizontal shaft at the pivot portion, and the pair of lever plates are arranged with a mutual interval larger than the diameter of the overhead pole, Each passing through the opposite side of the overhead wire column and extending to the opposite side of the extension direction of the overhead wire, bent to approach the overhead wire column on the opposite side of the extension direction of the overhead wire, The overhead wire tension balancer according to claim 1, wherein the weight is connected to a tip portion.

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