BASE ISOLATION DEVICE, BUILDING WITH BASE ISOLATION DEVICE AND CONTROL METHOD OF BASE ISOLATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a base isolation device furnished with a lock means simple in structure and inexpensive. SOLUTION: A base isolation device furnished with a lock means free to fix a building on a foundation 2 and to release fixing at the time when an earthquake detector detects an earthquake of more than a specified value has a hose 7 free to expand and contract by supply and discharge of hydraulic pressure and to lock the building on the foundation 2 at the time of expansion, a pressure pump 11 to supply pressure hydraulic pressure to the hose 7, a solenoid valve 12 to discharge hydraulic pressure pressure in the hose 7 and a control part to discharge hydraulic pressure in the hose 7a control part to discharge hydraulic pressure in the hose 7 by the pressure pump 11 by working at the time when this earthquake detector detects the earthquake of more than a set value.