公开(公告)号：US20220024720A1

公开(公告)日：2022-01-27

申请号：US17294855

申请日：2019-10-17

Applicant: Hitachi, Ltd.

Inventor： Takeshi KONDO ,  Shinsuke INOUE ,  Naoto OHNUMA ,  Yasutaka SUZUKI ,  Kohichiroh IDE

IPC: B66B5/16 ,  H02J9/06 ,  H02J7/00 ,  B66B5/06 ,  B66B1/32

Abstract: An elevator according to an aspect of the present invention includes a car speed detection device that measures car speed, an emergency braking device that comes into press contact with a guiderail and emergently stops a car when the car speed exceeds a threshold, an electric actuating unit that electrically actuates the emergency braking device, a battery that supplies electric power when commercial power supply is interrupted, and a safety control unit that monitors abnormality of the elevator and controls operation of the electric actuating unit. The safety control unit measures remaining power of the battery when the electric power is supplied from the battery, determines operation propriety of the emergency braking device at commercial power supply restoration time based on transition of battery remaining power, and controls operation of the electric actuating unit at the commercial power supply restoration time based on content of the determination.