Sumitomo Rubber Industries Limited

Sumitomo Gomu Kogyo Kabushiki Kaisha

Seinosuke Kato

Teruo Sasaki

Kazuhiro Fujisawa

Yoshiaki Miyamoto

Akemi Kawanabe

A vibration dumping device for cables used in a diagonal stress bridge is disclosed. The dumping device includes an anchor pipe 5, an anchor flange 7, and a cable flange 9. The anchor flange 7 is secured to the anchor pipe 5, while the cable flange 9 is secured to the cable 6 in an encircling relationship. The dumping device also includes an aligning flange 8. The aligning flange 8 includes mounting portions (slotted holes) 8c which permits the aligning flange 8 to be mounted on the anchor flange 7 in an eccentric relationship therewith. The aligning flange 8 also includes mounting seats (stud bolts) 8b for visco-elastic bodies 11. The aligning flange 8 is mounted on the anchor flange 7, with the center defined by the mounting seats 8b for the visco-elastic bodies being aligned with the longitudinal center of the cable 6. The visco-elastic bodies 11 are clampedly mounted between the aligning flange 8 and the cable flange 9.

Cable damping device

This invention is intended to provide a vibration damping device having a high degree of freedom of design of damping performance. This device includes rolling bodies (4) interposed between an upper structure (1) and a lower structure (2) to horizontally swingably support the upper structure (1) and elastomeric members (5) disposed between the rolling bodies (4) and the upper and lower structures (1, 2). In this device, rolling surfaces for the rolling bodies (4) are formed by elastomeric members (5) and rigid members (6). For example, the elastomeric and rigid members (5, 6) are disposed respectively in association with the opposite end regions and central regions of the rolling bodies (4). The elastomeric members (5) may be made of any desired material provided that it has viscoelasticty and the rigid member 6 may be made of any desired material provided that the rolling friction of the rolling bodies (4) thereon differs from that on the elastomeric members (5). For example, metal, ceramic material, rigid plastic material, FRP, FRM, and PTFE are preferable.

Vibration damping device

The present invention relates to a vibration-proofing device which supports an upper structure, such as a building, computers and other machines or a floor having such machines mounted thereon, on a lower structure, as a foundation, to allow the upper structure to swing, thereby isolating earthquakes, traffic vibrations and vibrations from the equipment installed in another room so as to protect the upper structure from vibrations. The invention is to provide a bearing type of vibration-proofing device which is simple in construction and capable of reliably absorbing not only horizontal but also vertical components of earthquakes, traffic vibrations and other vibrations, whether they are weak or strong, and which properly operates under low load and produces little vibration during operation. The invention provides an arrangement wherein interposed between upper and lower structures are rolling bodies for horizontally supporting the upper structure for swing movement. The rolling bodies are in the form of cylindrical rollers, elastomeric bodies are interposed between the cylindrical rollers and the upper and lower structures. It is desirable that the cylindrical rollers be stacked in n rows and that these rows of cylindrical rollers form an angle of 180.degree. /n. An air spring or coil spring device is disposed vertically of the cylindrical rollers and a plurality of taper rollers is radially arranged in a horizonial plane vertically of the cylindrical rollers.

Vibration-proofing device

An earthquake-proofing device of peripherally restrained type including a laminate constructed by alternately laminating rigid plates and rubber-like elastic plates, the laminate being formed with a cylindrical hollow portion which opens at its opposite ends as viewed in the direction of lamination, and a visco-elastic body to be inserted into the cylindrical hollow portion to fill the latter. The earthquake-proofing device is characterized in that the volume of the visco-elastic body is greater than that of the cylindrical hollow portion by an amount corresponding to the product of the portion of the inner surface area of the cylindrical hollow portion opposed to the rubber-like elastic plates and 5-60% of the thickness of a single rubber-like elastic plate. The visco-elastic body having such excessive volume is pressed into the cylindrical hollow portion.

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Nishinomiya, Japan

Seinosuke Kato