ESCALATOR DRIVE UNIT TO MANAGE DRIVE CHAIN TENSION

摘要

PROBLEM TO BE SOLVED: To provide an escalator drive unit in which tension of a drive chain can be constantly monitored.SOLUTION: An escalator drive unit 11 to manage driving chain tension comprises: a shaft 50 for a ratchet pole which is rotatably supported by support parts 54, 56 installed on a ceiling part of a truss 22; a shoe lever 60 in which its root part is fixed to one end of the shaft 50 for the ratchet pole and a shoe 62 laid on an outer peripheral surface of a drive chain 36 is given at the tip part; a structure that a claw part 49 of a ratchet pole 48 is engaged with a tooth part 46 of a ratchet wheel 44 to prohibit rotation of a drive spindle 38 when the shaft 50 for the ratchet pole is rotated equal to or larger than a prescribed angle; and a drive chain tension management unit 64 which manages tension state of the drive chain 36 on the basis of oscillation state of the shoe lever 60 when the shoe lever 60 is oscillated less than a prescribed angle.SELECTED DRAWING: Figure 2