PROBLEM TO BE SOLVED: To provide a suspension device for a trolley wire with a damper function free from frequent maintenance, inspection and member replacement, easily manufacturable and relatively inexpensively obtainable.
SOLUTION: The suspension device 1 for a trolley wire T has a cylindrical nonmagnetic casing 5 with one end coupled to a catenary line M and the other end provided with an opening 5d. A cylindrical housing 6 is disposed in the casing 5. The housing 6 consists of a magnetic substance and has longitudinal slots 6a, which enable it to contract radially. A piston 7 is relatively axially movably inserted in the housing 6 and urged upward by a spring 8. A rod part 7b is extended outward through the opening 5d and then coupled to the trolley wire T. The piston 7 has a magnetically attractive part 7a excited by permanent magnets 7c to magnetically attract an inner circumference of the housing 6. The magnetically attractive part 7a contracts the housing 6 to hold the piston 7 and thus damp a relative movement between the piston 7 and the housing 6.