| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration damper for a structure in which its configuration is simple, its manufacturing is easy and it does not require any complex valve structure, shortcomings found in a hydraulic damper and a resilient rubber damper are compensated and efficient earthquake energy absorption can be attained. ! SOLUTION: This invention comprises: a cylinder member fixed to one structure that is displaced relatively at the time of occurrence of earthquake; a piston rod 3 fixed to the other structure, extending from an opening part of the cylinder member, having an outer diameter that is approximately the same as an inner diameter of the cylinder member at its extremity end and provided with a valve body 6 forming a flow passage; a resilient rubber body 7 fixed to an outer peripheral surface of the piston rod 3 at the rear part of the valve body 6 and an inner peripheral surface of the cylinder member; and a rigid member 10 fixed to the outer periphery of the piston rod and the inner pe |
