PROBLEM TO BE SOLVED: To effectively transmit the wave motion of a trolley wire at the part where a hanger is mounted and to damp the wave motion with a lightweight and inexpensive structure.
SOLUTION: A hanger 3 has a hanger 4 and a grip member 5. A rubber elastic body 7 is vulcanized and integrally fixed to the curved part 6 of the hanger 4. The base of the rubber elastic body 7 wraps the curved part 6 uniformly. A protruding part 9 protrudes toward a hanging wire 2 with a horizontal cross-sectional area thereof gradually from the base 8 and contacts the outer periphery of the cylindrical part 10a of a protection cover 10 fixed to the hanging wire 2 at the protruding end. The wave motion of a trolley wire 1 produced when the pantograph of a train passes transmits a hanging part without producing a large reflection wave by means of the rubber elastic body 7 having a relatively large transmitting coefficient of wave motion. At the same time, vibration energy transmitted to the hanger is damped by the rubber elastic body 7 to prevent the vibration of the trolley wire 1. Accordingly the separating ratio of the trolley wire 1 from the pantograph is reduced to collect electricity stably and the stress to the hanger 3 is reduced to make the life of the hanger 3 longer.