Title:
ROTARY INERTIAL MASS DAMPER
Document Type and Number:
Japanese Patent JP2022178042
Kind Code:
A
Abstract:
To provide a rotary inertial mass damper which can prevent a control force from instantaneously increasing when long period pulse-like earthquake waves are caused and, at the same time, can interrupt transmission of low amplitude earthquake waves of high frequency.SOLUTION: A rotary inertial mass damper includes: a ball screw 2: a ball screw nut 3; a rotary inertial mass 4; and a rotation transmitting mechanism 5 which is provided between the ball screw nut 3 and the rotary inertial mass 4, transmits rotation of the ball screw nut 3 to the rotary inertial mass 4 and, thereby, rotates the ball screw nut 3 and the rotary inertial mass 4 integrally. Therein, the rotation transmitting mechanism 5 has: a first rotary transmission restricting mechanism 7 which does not transmit rotation of the ball screw nut 3 to the rotary inertial mass 4 when a value of relative displacement amount in an axial line direction between the ball screw 2 and the ball screw nut 3 is less than a first set value; and a second rotary transmission restricting mechanism 8 which does not transmit rotation of the ball screw nut 3 to the rotary inertial mass 4 when a value of relative acceleration in an axial line direction between the ball screw 2 and the ball screw nut 3 exceeds a second set value.SELECTED DRAWING: Figure 1
Inventors:
MIYAMOTO AKIRA
WATANABE KOICHI
WATANABE KOICHI
Application Number:
JP2021084546A
Publication Date:
December 02, 2022
Filing Date:
May 19, 2021
Export Citation:
Assignee:
SHIMIZU CONSTRUCTION CO LTD
International Classes:
F16F15/02; E04H9/02; F16H25/20; F16H25/22
Attorney, Agent or Firm:
Yasushi Matsunuma
Kenichi Kawabuchi
Kazuzumi Nishizawa
Kenichi Kawabuchi
Kazuzumi Nishizawa
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