US 12,103,823 B2
Vibration damping device and elevator apparatus
Eiichi Saito, Tokyo (JP); Takahide Hirai, Tokyo (JP); Seiji Watanabe, Tokyo (JP); Daisuke Nakazawa, Tokyo (JP); Daiki Fukui, Tokyo (JP); Tomohiro Asamura, Tokyo (JP); and Yusuke Chikada, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/051,786
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Dec. 3, 2018, PCT No. PCT/JP2018/044400
§ 371(c)(1), (2) Date Oct. 30, 2020,
PCT Pub. No. WO2019/220669, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 2018-093797 (JP), filed on May 15, 2018.
Prior Publication US 2021/0094799 A1, Apr. 1, 2021
Int. Cl. B66B 7/06 (2006.01); B66B 1/28 (2006.01); B66B 1/34 (2006.01); B66B 5/02 (2006.01); B66B 5/12 (2006.01); B66B 7/10 (2006.01); B66B 7/12 (2006.01); F16F 13/00 (2006.01); F16F 15/00 (2006.01); F16F 15/03 (2006.01); F16F 15/04 (2006.01); F16F 15/02 (2006.01)
CPC B66B 7/06 (2013.01) [B66B 1/28 (2013.01); B66B 1/3476 (2013.01); B66B 5/022 (2013.01); B66B 5/125 (2013.01); B66B 7/10 (2013.01); B66B 7/1215 (2013.01); F16F 13/007 (2013.01); F16F 15/002 (2013.01); F16F 15/03 (2013.01); F16F 15/035 (2013.01); F16F 15/04 (2013.01); F16F 15/022 (2013.01); F16F 2222/06 (2013.01); F16F 2228/007 (2013.01); F16F 2228/063 (2013.01); F16F 2230/0023 (2013.01); F16F 2230/0029 (2013.01); F16F 2230/18 (2013.01)] 39 Claims
OG exemplary drawing
 
1. A vibration damping device for reducing vibration of a long structure, comprising:
a displacement amplifier arranged along a given position in a longitudinal direction of the structure, the displacement amplifier being configured to amplify a displacement of the structure; and
a limiting member that includes a mechanical structure to limit a movement and thereby control displacement amplification performed by the displacement amplifier such that the displacement of the structure amplified by the displacement amplifier does not become greater than a first displacement, the first displacement being the displacement of the structure by which the structure is not allowed to return to an equilibrium position of the vibration,
wherein the displacement amplifier includes a magnet unit and the limiting member includes a non-magnetic body arranged between the magnet unit and the long structure.