# US 10,767,384 B2 · Sliding seismic isolation device

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- Number: US 10,767,384 B2
- Document ID: US10767384B2
- Status: Granted
- Kind: B2
- Application number: 16/304,206
- Filed: 2018-04-03
- Published: 2020-05-07
- Granted: 2020-09-08
- Earliest claimed: 2017-05-10
- Assignees: Nippon Steel & Sumikin Engineering Co., Ltd.
- Applicants: Nippon Steel & Sumikin Engineering Co., Ltd.
- Inventors: Naoya Wakita; Koji Nishimoto; Hisami Hasegawa; Shunsuke Kohzuki
- Web page: https://patentgrep.com/patent/US10767384B2

## CPC

- E04H 9/021: {Bearing, supporting or connecting constructions specially adapted for such buildings}
- 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)
- E04B 1/98: against vibrations or shocks (on foundations E02D31/08); against mechanical destruction, e.g. by air-raids (against incendiary damage only E04B1/94; finishing work therefor E04F; buildings withstanding earthquake or the like, shelters, arrangements of splintercatching walls E04H9/00)
- F16F 15/02: Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems ({F16F15/005 takes precedence } ; layered products B32B; suppression of vibration in ships B63; {relieving load on bearings, using magnetic means F16C39/06})
- 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

## Abstract

A sliding seismic isolation device includes an upper shoe and a lower shoe, the upper and lower shoes having sliding surfaces, and the sliding surfaces having curvatures; and a columnar steel slider disposed between the upper and lower shoes, the slider having an upper surface and a lower surface that are in contact with the upper and lower shoes, respectively, and have curvatures. A double-woven fabric layer is attached to each of the upper and lower surfaces of the slider via an adhesive layer, the double-woven fabric layer containing PTFE fibers and fibers with higher tensile strength than that of the PTFE fibers, and the PTFE fibers being arranged on sides of the sliding surfaces of the upper and lower shoes. A fluorine coat layer is disposed on a surface of the double-woven fabric layer, and a lubricating oil layer is disposed on a surface of the fluorine coat layer.

## Claims

### Claim 1

A sliding seismic isolation device comprising:
an upper shoe and a lower shoe, the upper and lower shoes each having a sliding surface with a curvature; and
a columnar steel slider disposed between the upper and lower shoes, the slider having an upper surface and a lower surface that are in contact with the upper and lower shoes, respectively, and have curvatures, wherein
a double-woven fabric layer is attached to each of the upper and lower surfaces of the slider via an adhesive layer, the double-woven fabric layer containing PTFE fibers and fibers with higher tensile strength than that of the PTFE fibers, and the PTFE fibers being arranged on sides of the sliding surfaces of the upper and lower shoes,
a fluorine coat layer is disposed on a surface of the double-woven fabric layer, and a lubricating oil layer is disposed on a surface of the fluorine coat layer, and
the double-woven fabric layer, the fluorine coat layer, and the lubricating oil layer are layered in this order.

### Claim 2 (depends on 1)

The sliding seismic isolation device according to claim 1, wherein the lubricating oil layer is a silicone oil layer.

### Claim 3 (depends on 2)

The sliding seismic isolation device according to claim 2, wherein the kinetic viscosity of the lubricating oil at 25 degrees C. of the lubricating oil layer is equal to or less than 1000 mm2/sec.

### Claim 4 (depends on 1)

The sliding seismic isolation device according to claim 1, wherein the fibers with higher tensile strength than that of the PTFE fibers are PPS fibers.

### Claim 5 (depends on 2)

The sliding seismic isolation device according to claim 2, wherein the fibers with higher tensile strength than that of the PTFE fibers are PPS fibers.