| 摘要 |
PROBLEM TO BE SOLVED: To provide a base isolation supporting device having a sufficient base isolating action independently of the direction of earthquake and allowing the setting to start base isolating action when the seismic intensity reaches a certain seismic intensity. SOLUTION: Shock absorbing members 4, 5 having elasticity are provided in a bottomed cylindrical body 3 having an upper part open. On the shock absorbing member, there are provided a foundation side fixing member having a ball supporting plate 6 on the upper face for supporting a plurality of steel balls 7 in a rolling manner and a supporting plate 8 as a building side fixing member provided on the steel balls so as to be horizontally displaceable with the rolling operation of the steel balls 7. A plurality of adjusters 9 are provided between the foundation side fixing member and the building member for restricting the horizontal displacement between the foundation side fixing member and a building with the resilience of a spring 12. The magnitude of the shaking by an earthquake can be set to start the base isolating operation by adjusting the free lengths of the adjusters. COPYRIGHT: (C)2004,JPO
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