Oiles Corporation

Osamu Kochiyama

Kenta Nagahiro

Ikuo Shimoda

Hiroyuki Ogoe

Hirokazu Iemura

Shinji Sato

Yoshiyuki Fujii

Yasunari Kimura

Shuhei Kaneko

Kazunori Inaba

A seismic isolation apparatus includes a laminated body having alternately laminated rubber plates and steel plates; a hollow portion provided inside the laminated body in a hermetically closed manner and extending in a laminated direction; a lead plug filled densely in the hollow portion and adapted to damp the vibration in a shearing direction of the laminated body by absorbing vibrational energy in the shearing direction; and a lid member having a semispherical concave surface which comes into contact with one end portion in the laminated direction A of the lead plug in order to guide and assist the plastic flow of the lead plug at one end portion in the laminated direction of the hollow portion in the deformation in the shearing direction of the lead plug.

Seismic isolation apparatus

A seismic isolation apparatusincludes a laminated bodyhaving alternately laminated a plurality of elastic layersand rigid layers, and a lead plugbeing disposed therein without clearances in a hollow portionextending in a laminated direction V of the laminated bodywith respect to inner peripheral surfacesof the elastic layers, inner peripheral surfacesof the rigid layers, a lower surfaceof an upper plate, and an upper surfaceof a lower plate

A laminated sliding memberincludes a base bodyhaving one flat surfacewhich is circular in a plan view and a solid lubricant layeradhered to the flat surfaceof the base bodyand having a sliding surfacewhich is circular in a plan view.

Laminated sliding member and sliding bearing using the laminated sliding member

A vibrational energy absorbing apparatusincludes: a reciprocating memberwhich is reciprocatable in H directions between positive and negative maximum displacement positions D&#xb1;max with respect to an origin position O; a damping-force generating meansfor generating a damping force R with respect to the reciprocating motion of the reciprocating memberin the H directions; and a controlling meansfor controlling the damping-force generating meansso as to cause the damping-force generating meansto generate a fixed damping force R in the respective movement of the reciprocating memberin the H direction from the positive and negative maximum displacement position D&#xb1;max to the origin position O in the reciprocating motion thereof in the H directions, while causing the damping-force generating meansto substantially not generate the damping force R in the respective movement of the reciprocating memberin the H direction from the origin position O to the positive and negative maximum displacement position D&#xb1;max following that movement in the H direction.

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Ashikaga, Japan

Osamu Kochiyama