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    • 4. 发明专利
    • LEAD DAMPER
    • JPH11344061A
    • 1999-12-14
    • JP15456498
    • 1998-06-03
    • MITSUBISHI HEAVY IND LTD
    • ITO TOMOHIROKOKUBO EIJI
    • G21C13/02F16F7/12F16F15/02G21D1/00
    • PROBLEM TO BE SOLVED: To provide a lead damper which does not cause lowering of the vibration reducing effect even in case the vibration generated in an anti-seismic structure lasts long, by smoothly releasing to outside the heat generated by the plastic fluidification. SOLUTION: A lead damper 1 has a lead piece installed on the peripheral surface of a rod 2 which is to reduce the vibration generated in an anti-seismic structure by a resisting force associated with the plastic fluidification of the central part of the lead produced when a projection on the rod 2 makes movement and is equipped with a plurality of cooling holes 3 bored parallel with the axis, arranged in the circumferential direction on the periphery, generating an air flow 7 internally, and releasing to outside the heat generated by the plastic fluidification. Accordingly the vibrational energy of the anti-seismic structure is absorbed effectively by the resisting force produced in the manner described above, and the reduction of vibrations can be established effectively.