PROBLEM TO BE SOLVED: To provide a vibration control tool which can be simply and surely mounted on a trolley wire hanger in use and transmit and damp the wave motion of a trolley wire effectively.
SOLUTION: A trolley wire is suspended by a hanging wire via a hanger. A vibration control tool mounted on the curved part of the hanger has a mounting member and an elastic body 9. The mounting member is fixed such that it surrounds the curved part in a predetermined range. The mounting part comprises a base body 11 mounted on the inner side of the curved part 6 and a cover 12 positioned outside the curved part 6 and fitted in the base body 11. The elastic body 9 made of rubber has an arc-shaped support part 9a curved along the curved part and a protruding part 9b protruding downward inside the curved part from the top of the support part 9a and reducing a horizontal cross-sectional area gradually. The wave motion of the trolley wire caused by a sliding pantograph travels on the trolley wire without being reflected by means of elasticity of the elastic body 9 of the vibration control tool and is damped because vibration energy is absorbed.