| 摘要 |
PROBLEM TO BE SOLVED: To provide a base isolation floor structure capable of making an installation space compact by decreasing the number of restoration mechanisms (restoration springs, constant load springs) to be installed, while securing a base isolation performance.SOLUTION: The base isolation floor structure comprises: a base isolation floor body 2 on which a base isolation object is mounted; a support part 3 in which the base isolation floor body 2 is installed via a slide material and the base isolation floor body 2 is supported in a slidable manner; and a restoration mechanism 6 which is provided while connecting to the support part 3 and the base isolation floor body 2 and suppresses excessive displacement of the base isolation floor body 2, for restoring the displaced base isolation floor body 2 at an original position. The restoration mechanism 6 includes: a constant load spring 7 integrally provided in the support part 3; a moving pulley 9 which is connected to the base isolation floor body 2 via a connection part 8 and provided so as to follow the base isolation floor body 2; and a rope body 10 of which one end 10a is connected to the constant load spring 7 and another end 10b is connected to the support part 3, respectively, and which is wound around the moving pulley 9 while applying a fixed tensile force with spring elasticity of the constant load spring 7. |
