公开(公告)号：US20180118513A1

公开(公告)日：2018-05-03

申请号：US15569685

申请日：2015-04-28

Applicant: OTIS ELEVATOR COMPANY

Inventor： Aurélien Fauconnet ,  Pascal Rebillard ,  Franck Dominguez ,  Frédéric Beauchaud ,  Frédéric Grimault

IPC: B66B5/00

CPC classification number: B66B5/0031 ,  B66B5/0025 ,  B66B5/0068

Abstract: A monitoring system for an elevator system to ensure a predetermined elevator shaft clearance is provided and includes an elevator car moveably disposed in an elevator shaft and guided along at least one guide rail, the elevator shaft having a top surface and a bottom surface. Also included is a counterweight moveably disposed in the elevator shaft. Further included is a position monitoring device monitoring a position of at least one of the elevator car and the counterweight relative to at least one of the top surface and the bottom surface. Yet further included is a braking device actuated to initiate a braking event in response to detection of the position of at least one of the elevator car and the counterweight being within a predetermined distance from one of the top surface and the bottom surface.