US 12,227,391 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. 17/051,788
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Dec. 3, 2018, PCT No. PCT/JP2018/044401
§ 371(c)(1), (2) Date Oct. 30, 2020,
PCT Pub. No. WO2019/220670, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 2018-093797 (JP), filed on May 15, 2018.
Prior Publication US 2021/0231190 A1, Jul. 29, 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)] 13 Claims
OG exemplary drawing
 
1. A vibration damping device for reducing vibration of an elevator rope that is wound on and folded over one or more sheaves of an elevator, comprising:
a displacement amplifier arranged around a region from a first portion of the elevator rope drawn from the one or more sheaves and a second portion of the elevator rope drawn from an opposite side of the one or more sheaves in parallel with the first portion, the displacement amplifier being configured to amplify a displacement of each of the first portion and the second portion of the elevator rope; and
a limiting member that controls displacement amplification performed by the displacement amplifier such that the displacement of the first portion or the second portion amplified by the displacement amplifier does not become greater than a first displacement, the first displacement being a displacement of the elevator rope by which the elevator rope is not allowed to return to an equilibrium position of the vibration.