CHAIN LOOSENESS DETECTING DEVICE OF SLUICE OPENING/CLOSING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a chain looseness detecting device of a sluice opening/closing device for stopping an electric motor by detecting an abnormality when the abnormality occurs when a door body descends.;SOLUTION: Since an abnormality detecting means 15, that is, a planetary gear mechanism 18, a shaft 28 projected from the outer peripheral surface of an internal gear 21 of the planetary gear mechanism 18, an energizing mechanism 22 for energizing the shaft 28 from one rotational direction side for regulating the rotational movement of the internal gear 21 of the planetary gear mechanism 18, and a looseness detecting limit switch 29b arranged in a separate position on the one rotational direction side of the tip of the shaft 28 and stopping the electric motor 13 by abutting on the shaft 28 are arranged in a transmission mechanism of a driving part 5 when the door body 2 descends, when a load of about a chain only acts on a driven shaft, the energizing mechanism 22 presses the shaft 28, and the tip of the shaft 28 pushes the looseness detecting limit switch 29b, and can stop the electric motor 13.;COPYRIGHT: (C)2006,JPO&NCIPI