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    • 1. 发明专利
    • BASE ISOLATION DEVICE PROVIDED WITH CURVED PLATE
    • JPH1030361A
    • 1998-02-03
    • JP18765496
    • 1996-07-17
    • FUJITA CORP
    • NAKAMURA YOSHIYATANAKA KIYOSHIGOMI HARUTO
    • E04H9/02
    • PROBLEM TO BE SOLVED: To provide a base isolation device which is horizontally deformable and excellent in the restoration property and facilitate setting and adjusting of the natural period, by superposing three blocks which are provided with curved faces at respective boundary faces and also an anti-frictional material at the curved face layers and interposing these three blocks between the base of a building and the foundation. SOLUTION: Three blocks of upper, intermediate, and lower blocks C, D, E are superposed between a building and the foundation. In this time, the boundary faces of vertically adjacent blocks are formed to have a curved shape. And an anti-frictional material F is charged in the faces. When the building is horizontally deformed, the intermediate block is rotated and the contact face at every block is reduced. And hence, the outside dimensions Lx , Ly , h are designed, taking the safety factor into consideration. The radius curvatures RX, RY of respective blocks are designed to coinside with an objective natural period for the base isolation. The natural period can be made longer by only increase of the radius of curvature of respective blocks. In this way, restoration coil springs are eliminated and hence, the device can be miniaturized.
    • 9. 发明专利
    • STRETCHING FIXING DEVICE FOR STRUCTURE
    • JPH032444A
    • 1991-01-08
    • JP20377788
    • 1988-08-18
    • FUJITA CORP
    • YOMO MASATAKEGOMI HARUTO
    • E04B1/34E04B5/00E04H15/62
    • PURPOSE:To enable a structure to be certainly fixed by filling up the internal pipe of an internal pipe containing double pipe penetrated into ground, with weight substance, to provide the upper section of an external pipe with a pulley, and by suspending the internal pipe with a stretching cable from the frame of the structure, in the external pipe. CONSTITUTION:The external pipe 1 of a steel pie pile or the like is penetrated into ground, and an internal pipe 2 is moved down up to the bottom surface of the external pipe 1, and the internal section of the internal pipe 2 is filled up with the weight substance 3 of gravel, sand, concrete, or the like. Then, with the internal pipe 2, a structure setting stretching cable 5 is engaged, and the stretching cable 5 is engaged with the fulcrum of the frame of a structure via a pulley 4 set on the upper section of the external pipe 1. After that, by a fastening device 6, a tensile force is applied to the structure and at the same time, the internal pipe 2 is lifted up. As a result, a constant stretching force is always worked on stretching material, and the structure can be stabilized.