Located steps or pallets running entrances, to facilitate the transition of passengers up and down steps or pedal parts and engaging.
Also a safety device of the elevator, back comb has micro switch, if the foreign body can snap into the elevator stopped running.
Comb plate side support in the forefront of the board, on the other side as the fixed side comb. Its horizontal tilt angle <10 °. Comb structure should be adjustable to ensure the engagement of the comb ≥6 mm depth.