Patent ID: 6385917
Filing Date: 2002-05-14
Classification: E04H,F16F

Abstract:
A base isolation device with damping mechanism, which is disposed between a basement and a structure body arranged on the basement and suppresses a transmission of a quake from the basement to the structure body, characterized by comprising:1st and 2nd track rails formed with ball rolling faces along a longitudinal direction and disposed orthogonally to each other; a 1st slide member incorporated to the 1st track rail through many balls and freely linearly movable in reciprocation along the 1st track rail; a 2nd slide member connected to either of the 1st track rail or the 1st slide member, incorporated to the 2nd track rail through many balls and freely linearly movable in reciprocation along the 2nd track rail; motion conversion means which has a rotation transmission body arranged such that its axis agrees with a moving direction of the 1st slide member or the 2nd slide member, and converts a linear reciprocation motion of the slide member into a normal/reverse rotary motion of the rotation transmission body; a rotary sleeve connected to the rotation transmission body; a stationary sleeve accommodating the rotary sleeve and forming an action chamber of damping force between it and the rotary sleeve; and a viscous fluid sealed in the action chamber.