Abstract: A damping device for structure includes a base frame installed on a target place, an air floating mass disposed on the base frame to blow off air, a TMD mass disposed above the base frame to float with an air pressure, one pair of guiderail units disposed on X-direction both sides of the base frame along the X direction respectively, slider units disposed to be slidable in the X direction relative to the guiderail units, coupled to each X-direction side face of the TMD mass and each including a slider moving up/down mechanism part which moves down a slider when the TMD mass floats, an oil damper attached to the base frame to exert an attenuation action on the TMD mass and a coil spring attached to the base frame to exert a restoration action on the TMD mass.

Abstract: A damping device for structure includes a base frame installed on a target place, an air floating mass disposed on the base frame to blow off air, a TMD mass disposed above the base frame to float with an air pressure, one pair of guiderail units disposed on X-direction both sides of the base frame along the X direction respectively, slider units disposed to be slidable in the X direction relative to the guiderail units, coupled to each X-direction side face of the TMD mass and each including a slider moving up/down mechanism part which moves down a slider when the TMD mass floats, an oil damper attached to the base frame to exert an attenuation action on the TMD mass and a coil spring attached to the base frame to exert a restoration action on the TMD mass.

Abstract: A low-bed type seismic isolator for a display case, which includes: at least two lines of arcuate X-rails (3) fixed to a lower plate (1) on a foundation and having lower central portions and higher end portions; at least two lines of arcuate Y-rails (4) fixed to a lower surface of an upper plate (2) above the X-rails (3) and having higher central portions and lower end portions in a direction perpendicularly to the X-rails; connection blocks (5) having lower portions clamping the X-rails, upper portions clamping the Y-rails, and a disk spring provided at the central portions thereof; absorbers (8) disposed on the ends of the X-rails and Y-rails and recesses which fixedly accommodates support legs (7) fixed to the lower surface of the upper plate and protruded downwardly from a seismic isolation object.

Abstract: A seismic isolator includes a lower guide rail 4 having grooves on the side surfaces thereof and fitted to an upper surface of a lower plate 1, an upper guide rail 6 having grooves on the side surfaces thereof and fitted to a lower surface of an upper plate in a direction criss-crossing the lower guide rail 4, a block body 9 clamping at its lower part the lower guide rail 4 and clamping at its upper part the upper guide rail 6, a large number of rollers interposed between the lower guide rail 4 and the block body 9 and between the upper guide rail 6 and the block body 9, a large number of balls interposed between grooves of the side surfaces of the lower guide rail 4 and the block body 9 and between grooves of the side surfaces of the upper guide rail 6 and the block body 9 and a flexible member 22 fitted between the lower surface of the upper plate and the upper surface of the lower plate 1.

Abstract: A seismic isolation sliding bearing for a structure, is made up of a dish 1 having a conical concave surface having a predetermined inclination or a spherical concave surface in its central portion, and a bearing element 2 in which the bearing element includes a base 3 whose portion for contact with the concave surface of the dish 1 is formed by a low-friction material, and a holder 6 which holds the base 3 so as to press it against the concave surface of the dish 1. The seismic isolation sliding bearing of the present invention neither resonates to the vibration period of any earthquake nor causes a large oscillation during a normal small vibration, but has a restoring force because of its structure which enables the bearing element to readily return to its original position after an earthquake ceases.

Abstract: A damping apparatus for large structures operable both passively and actively is disclosed which comprises a passive type damping mechanism to be mounted on the structure and including an added mass, spring, dampener, etc., hydraulic cylinders mounted on the structure and connected to the added mass, an electro-hydraulic servo mechanism to switch the hydraulic cylinders between passive and active type operation, and a control unit for switching the electro-hydraulic servo mechanism between passive and active type operation in response to the velocity and displacement of the added mass as well as the velocity of the structure.

Abstract: A vibration controlling apparatus for buildings such as high-rise building, tower and the like comprises a laminated elastic body comprised of elastomer layers and reinforcing plates attached to the building, and an additional mass attached thereto, and reduces the swinging of the building.

Abstract: An earthquake isolation floor comprises a horizontal plate-like support frame having a generally circular or polygonal configuration, a support frame having a horizontal surface with a similar configuration to that of the fundamental frame in a plan view, but of relatively smaller dimensions, a number of horizontal springs disposed radially between the fundamental and support frames with each of the springs being kept in a preset state, and a number of horizontal dampers disposed radially between the fundamental and the support frames, whereby machinery and tools, etc. to be protected against vibration such as caused by an earthquake are adapted to be mounted on the support frame.