| 摘要 |
PROBLEM TO BE SOLVED: To restrain bending deformation even if a large vertical load is applied, and improve a base isolation function by alternately adhering/laminating thin rubber and an intermediate steel plate with a flange bending at a right angle to a plane part on a lower installing plate, and placing an upper installing plate on the laminated rubber. SOLUTION: A rubber layer 2 and an intermediate steel plate 3 where a flange 4 is arranged at a right angle to a periphery of a plate part, are alternately laminated on a lower installing plate l by using an adhesive. In this case, the flange 4 of the intermediate steel plate 3 is made larger than an external shape of the rubber layer 2 so as not to hinder horizontal deformation of the rubber layer 2. An upper installing plate 5 is placed on this laminated rubber. Weatherproof covering rubber 6 is installed on an outer periphery of the laminated rubber, and a secular change in the rubber layer 2 is restrained. Therefore, even if a large vertical load acts when a laminated rubber support is largely deformed in the horizontal direction, bending deformation of the intermediate steel plate 3 with a flange is reduced, and horizontal rigidity of the laminated rubber support is kept small, and a base isolation effect can be maintained. |
