Hand rail driving apparatus for escalator

Abstract

The present invention comprises a hand rail driving apparatus which can easily compensate loss of driving force and tension of a hand rail, which is essential to safety of an escalator without damaging a flat belt or a roller thereof. The hand rail driving apparatus includes an escalator in which a hand rail is contacted with pressure on a hand rail driving pulley, connected through a driving chain to a driving wheel, and in which the hand rail driving apparatus drives the hand rail while exerting pressure on the hand rail by using the driving pulley. A tube, in which air pressure therein is variable, is mounted on a circumferential surface of the hand rail driving pulley to which the hand rail is contacted with pressure. A hand rail driving apparatus includes a roller unit for exerting pressure on both upper and lower surfaces of the hand rail when driving the hand rail by contacting with pressure on hand rail on a plurality by driving rollers, and a plurality of driven rollers corresponding to the driving rollers, and tension rollers for transmitting power from a driving wheel to the roller unit. The tube is mounted on circumferential surfaces of each of the driving rollers of the roller unit.

Dependencies are inferred from the claim text.