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AssigneesOkumura Corporation, Oiles Corporation
InventorsSusumu Otsuka, Kunio Hayakawa, Ikuo Shimoda, Kiyoharu Suzuki, Masami Mochimaru, Mitsuru Miyazaki
Estimating the term…
A seismic isolation apparatus is structured such that a pair of seismic isolation mechanisms are formed each having a pair of upper and lower clamping members formed in the shape of a rectangular frame, wherein upper and lower roller guide surfaces, in each of which a longitudinal central portion is formed as a concavely arcuate curved surface and portions respectively extending therefrom are formed as convexly arcuate curved surfaces, are formed on the four sides of the upper and lower clamping members, and wherein rollers each having a circular cross section are respectively interposed between the upper and lower roller guide surfaces. The pair of seismic isolation mechanisms are installed by being superposed on top of each other such that the rolling directions of the rollers in the two seismic isolation mechanisms are perpendicular to each other. During the occurrence of an earthquake, the rollers are adapted to roll in contact with the upper and lower roller guide surfaces so as to absorb and dampen seismic waves in the longitudinal and transverse directions of the apparatus.
A seismic isolation apparatus comprising upper and lower seismic isolation mechanisms each having a pair of upper and lower clamping members with, in a number of locations on opposing surfaces thereof, upper and lower roller guide surfaces, and rollers each having a circular cross-section and respectively interposed between the upper and lower roller guide surfaces in such a manner as to be capable of rolling in an identical horizontal direction, said upper and lower seismic isolation mechanisms being combined vertically integrally such that a rolling direction of the rollers in said upper seismic isolation mechanism intersects a rolling direction of the rollers in said lower seismic isolation mechanism, at least one of the upper and lower roller guide surfaces including a concavely arcuate curved surface in a central portion thereof in the rolling direction of the roller, and convexly arcuate curved surfaces in portions thereof respectively extending from opposite ends of the concavely arcuate cured surface.
A seismic isolation apparatus comprising upper and lower seismic isolation mechanisms each having a pair of upper and lower clamping members with, in a number of locations on opposing surfaces thereof, upper and lower roller guide surfaces, and rollers each having a circular cross-section and respectively interposed between the upper and lower roller guide surfaces in such a manner as to be capable of rolling in an identical horizontal direction, said upper and lower seismic isolation mechanisms being combined vertically integrally such that a rolling direction of the rollers in said upper seismic isolation mechanism intersects a rolling direction of the rollers in said lower seismic isolation mechanism, one of the upper and lower roller guide surfaces including a concavely arcuate roller guide surface having a fixed radius of curvature, while another one of the upper and lower roller guide surfaces includes a flat roller guide surface or a concavely arcuate roller guide surface having a radius of curvature different from that of one of the upper and lower roller guide surfaces.
Dependencies are inferred from the claim text.