# US 2014/0360108 A1 · Seismic isolation mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360108 A1 - Document ID: US20140360108A1 - Status: Published application - Kind: A1 - Application number: 14/370,619 - Filed: 2013-01-07 - Published: 2014-12-11 - Earliest claimed: 2012-01-10 - Assignees: Oiles Corporation - Applicants: Oiles Corporation - Inventors: Shigeo Fujiu - Web page: https://patentgrep.com/patent/US20140360108A1 ## CPC - E04H 9/022: {and comprising laminated structures of alternating elastomeric and rigid layers} - E04B 1/36: Bearings or like supports allowing movement (for bridges E01D19/04; buildings with-standing earthquakes E04H9/02) - E04H 9/0215: {involving active or passive dynamic mass damping systems} - E04H 9/0235: {Anti-seismic devices with hydraulic or pneumatic damping} - F16F 1/40: consisting of a stack of similar elements separated by non-elastic intermediate layers {(F16F9/306 takes precedence; laminated constructions to protect buildings against abnormal external influences, e.g. earthquakes, E04H9/022)} - F16F 1/50: loaded mainly in shear - F16F 9/003: {Dampers characterised by having pressure absorbing means other than gas, e.g. sponge rubber} - F16F 9/20: with the piston-rod extending through both ends of the cylinder {, e.g. constant-volume dampers} - F16F 15/023: using fluid means - F16F 15/04: using elastic means (single elements or their attachment F16F1/00 - F16F13/00); {(F16F15/023, F16F15/03 take precedence)} - E01D 19/04: Bearings {(E01D19/005 takes precedence; specially for movable bridges E01D15/005 - E01D15/10)}; Hinges - F16F 2224/025: Elastomers - F16F 2230/0029: Location, co-location - E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D) - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - E01D: CONSTRUCTION OF BRIDGES, {ELEVATED ROADWAYS} OR VIADUCTS; ASSEMBLY OF BRIDGES (bridges extending between terminal buildings and aircraft for embarking or disembarking passengers B64F1/305; {tracks for special kinds of railways E01B25/00; culverts E01F5/005}) ## Abstract A seismic isolation mechanism 1 includes a seismic isolation apparatus 6 which is installed at one end 2 in a vertical direction V on a superstructure 3 and installed at another end 4 in the vertical direction V on a floor 5 serving as a foundation or a substructure to isolate the vibration of the superstructure 3 with respect to the floor 5; an attenuation damper 10 which is connected at one end 7 in the horizontal direction H to the superstructure 3 and connected at another end 8 in the horizontal direction H to a portion 9 of the seismic isolation apparatus 6 between the one end 2 and the other end 4 thereof to attenuate the vibration of the superstructure 3 with respect to the floor 5 as it is extended and contracted in the horizontal direction H; and an attenuation damper 13 which is connected at one end 11 in the horizontal direction H to the floor 5 and connected at another end 12 in the horizontal direction H to the portion 9 of the seismic isolation apparatus 6 to attenuate the vibration of the superstructure 3 with respect to the floor 5 as it is extended and contracted in the horizontal direction H. ## Claims ### Claim 1 A seismic isolation mechanism comprising: a seismic isolation apparatus which is installed at one vertical end thereof on a superstructure and installed at another vertical end thereof on a foundation or a substructure to isolate the vibration of the superstructure with respect to the foundation or the substructure; one attenuation damper which is connected at one horizontal end thereof to the superstructure and connected at another horizontal end thereof to a portion of the seismic isolation apparatus between the one end and the other end thereof to attenuate the vibration of the superstructure with respect to the foundation or the substructure as it is extended and contracted in a horizontal direction; and another attenuation damper which is connected at one horizontal end thereof to the foundation or the substructure and connected at another horizontal end thereof to the portion of the seismic isolation apparatus between the one end and the other end thereof to attenuate the vibration of the superstructure with respect to the foundation or the substructure as it is extended and contracted in the horizontal direction, wherein said one attenuation damper and said other attenuation damper are arranged in such a manner as to respectively extend in one direction which is a horizontal direction so that damping forces due to extension and contraction are simultaneously produced in said one attenuation damper and said other attenuation damper in the vibration of the superstructure with respect to the foundation or the substructure in the one direction, ### Claim 2 (depends on 1) The seismic isolation mechanism according to claim 1, wherein each of said one attenuation damper and said other attenuation damper includes a cylinder body; a piston disposed in the cylinder body so as to partition an interior of the cylinder body into two chambers; an orifice passage allowing the two chambers to communicate with each other; one piston rod which is connected at one end thereof to the piston and is passed through one end portion of the cylinder body to project outside the cylinder body; another piston rod which is connected at one end thereof to the piston and is passed through another end portion of the cylinder body to project outside the cylinder body; and a fluid which is filled in the two chambers of the cylinder body. ### Claim 3 (depends on 2) The seismic isolation mechanism according to claim 2, wherein the cylinder body of said one attenuation damper is connected to the superstructure, the other piston rod which is passed through the other end portion of the cylinder body of said one attenuation damper to project outside the cylinder body is connected to the portion between the one end and the other end of the seismic isolation apparatus, the cylinder body of said other attenuation damper is connected to the foundation or the substructure, and the other piston rod which is passed through the other end portion of the cylinder body of said other attenuation damper to project outside the cylinder body is connected to the portion between the one end and the other end of the seismic isolation apparatus. ### Claim 4 (depends on 1) The seismic isolation mechanism according to claim 1, wherein said seismic isolation apparatus includes a laminated rubber seismic isolation device having at least one laminated rubber body in which a rubber elastic layer and a hard plate layer are alternately laminated. ### Claim 5 (depends on 4) The seismic isolation mechanism according to claim 4, wherein said laminated rubber seismic isolation device has at least two laminated rubber bodies, one of the two laminated rubber bodies being mounted on the superstructure, another one of the two laminated rubber bodies being mounted on the foundation or the substructure, a connecting member to which respective other ends of said one attenuation damper and said other attenuation damper are connected being interposed between the two laminated rubber bodies. ### Claim 6 (depends on 5) The seismic isolation mechanism according to claim 5, wherein said seismic isolation apparatus includes a sliding seismic isolation device having at least one sliding seismic isolation body constituted by a sliding member and a receiving plate which are brought into contact with each other slidably in the horizontal direction, and said sliding seismic isolation device is interposed between the two laminated rubber bodies in a vertical direction. ### Claim 7 (depends on 6) The seismic isolation mechanism according to claim 6, wherein said sliding seismic isolation device has at least two sliding seismic isolation bodies, one of the two sliding seismic isolation bodies being interposed between the one laminated rubber body and said connecting member in a vertical direction, another one of the two sliding seismic isolation bodies being interposed between said connecting member and the other laminated rubber body in the vertical direction. ### Claim 8 (depends on 1) The seismic isolation mechanism according to claim 1, wherein said seismic isolation apparatus includes a sliding seismic isolation device having at least one sliding seismic isolation body in which a sliding member and a receiving plate adapted to be brought into contact with the sliding member slidably in the horizontal direction are brought into contact with each other slidably in the horizontal direction. ### Claim 9 (depends on 8) The seismic isolation mechanism according to claim 8, wherein said sliding seismic isolation device has at least two sliding seismic isolation bodies, one of the two sliding seismic isolation bodies being mounted on the superstructure, another one of the two sliding seismic isolation bodies being mounted on the foundation or the substructure, a connecting member to which respective other ends of said one attenuation damper and said other attenuation damper are connected being interposed between the two sliding seismic isolation bodies. ### Claim 10 (depends on 9) The seismic isolation mechanism according to claim 9, wherein said seismic isolation apparatus includes a laminated rubber seismic isolation device having at least one laminated rubber body in which a rubber elastic layer and a hard plate layer are alternately laminated, and said laminated rubber seismic isolation device is interposed between the two sliding seismic isolation bodies in the vertical direction. ### Claim 11 (depends on 10) The seismic isolation mechanism according to claim 10, wherein said laminated rubber seismic isolation device has at least two laminated rubber bodies, one of the two laminated rubber bodies being interposed between one of the sliding seismic isolation bodies and said connecting member in the vertical direction, another one of the two laminated rubber bodies being interposed between said connecting member and another one of the sliding seismic isolation bodies in the vertical direction. ### Claim 12 (depends on 10) The seismic isolation mechanism according to claim 10, wherein the sliding member and the receiving plate of each of the two sliding seismic isolation bodies are so adapted that, in the relative displacement of the superstructure with respect to the foundation or the substructure in the horizontal direction, in the case of its displacement at a fixed level or below, shear deformation in the horizontal direction is caused in each of the two laminated rubber bodies, while sliding in the horizontal direction is not caused between the sliding member and the receiving plate, and in the case of its displacement at more than the fixed level, frictional resistance for causing sliding in the horizontal direction to occur between the sliding member and the receiving plate is produced between mutually contacting surfaces of the sliding member and the receiving plate.