US 11,987,473 B2
Escalator device
Laize Li, Haining (CN)
Assigned to OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed by Otis Elevator Company, Farmington, CT (US)
Filed on Oct. 13, 2022, as Appl. No. 17/965,411.
Claims priority of application No. 202210568374.8 (CN), filed on May 24, 2022.
Prior Publication US 2023/0406676 A1, Dec. 21, 2023
Int. Cl. B66B 25/00 (2006.01); B66B 21/04 (2006.01); B66B 23/12 (2006.01); B66B 23/14 (2006.01); G01L 1/16 (2006.01)
CPC B66B 25/006 (2013.01) [B66B 21/04 (2013.01); B66B 23/12 (2013.01); B66B 23/14 (2013.01); G01L 1/16 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An escalator device, comprising:
a plurality of steps, wherein both sides of each step are provided with mounting portions and step wheels rotatably mounted to the mounting portions;
step wheel guide rails fixedly arranged on both sides of the escalator device for guiding the step wheels of each step, wherein during operation of the escalator device, the step wheels of each step move along the step wheel guide rails on both sides respectively; and
anti-detachment guide rails arranged on both sides of the escalator device, wherein during movement of the step wheels of each step along the step wheel guide rails on both sides respectively, the anti-detachment guide rails are located above and spaced apart from anti-detachment portions of each step;
wherein a piezoelectric sensors is provided on the surface of the anti-detachment guide rail facing the anti-detachment portion.