Damper and vibration damping structure using the same

摘要

A damper (7) includes a hollow outer elongated body (21) formed of a cylindrical member; a hollow inner elongated body (22) similarly formed of a cylindrical member; a viscous body (26) disposed in a cylindrical gap (25) between an inner surface (23) of the elongated body (21) and an outer surface (24) of the elongated body (22) in such a manner as to be in contact with the inner surface (23) and the outer surface (24) of these elongated bodies (21 and 22), respectively; rectangular attaching plate members (31 and 32) which are respectively secured to a closed-side other end portion (29), in an axial direction (X), of the elongated body (21) having one end portion (28) on an open end (27) side and to a closed-side one end portion (30) of the elongated body (22), respectively; and a holding means (33) for holding the gap (25) between the inner surface (23) of the elongated body (21) at the one end portion (28) of the elongated body (21) and the outer surface (24) of the elongated body (22).