| 摘要 |
A damper (7) for damping the vibration or the like caused by an earthquake, comprising:
at least a hollow outer elongated body (21) and a hollow inner elongated body (22);
said inner elongated body (22) including an inserted portion (39) which has an outer surface (24) extending in an axial direction and disposed with a gap (25) with respect to an axially extending inner surface (23) of said outer elongated body (21), and which is inserted in said outer elongated body (21) so as to be relatively movable in the axial direction, and one end portion (30) which integrally extends from said inserted portion (39) in the axial direction and projects to the outside from one axial end portion (28) of said outer elongated body (21),
a viscous body or a viscoelastic body (26), which is set in a hermetically sealed state, being disposed in the gap (25) between the inner surface (23) of said outer elongated body (21) and the outer surface (24) of said inner elongated body (22) in such a manner as to be in contact with the inner surface (23) and the outer surface (24), a one-side attaching plate member (31) being secured to another end portion (29) of said outer elongated body (21), an other-side attaching plate member (32) being secured to the one end portion (30) of said inner elongated body (22),
characterized in that said damper (7) further comprises a compressible body (148) which is embedded in the viscous body or the viscoelastic body (26) filled in the hollow portion of at least one of said outer and said inner elongated bodies (21,22), and whose volume decreases or increases due to the increase or decrease of the internal pressure of the viscous body or the viscoelastic body (26). |
