The structure Tokarada winding return spring of the switchgear

摘要

PROBLEM TO BE SOLVED: To provide a winding member structure with a return spring of an opening and closing device enabling a reduction in the size of the overall opening and closing device with the return spring.;SOLUTION: A winding body 4 taking in and letting off a shutter curtain 1 to open/close and move the shutter curtain 1 as an opening and closing body comprises a plurality of rotating bodies 22 axially disposed on a center shaft 20 and having power springs 26 as the return springs. An opening and closing machine 50 as a drive device for imparting a normal and reverse rotating forces to the winding body 4 is installed between two rotating bodies among the plurality of rotating bodies on the center shaft 20. The normal and reverse rotating forces are imparted from the opening and closing machine 50 to the winding body 4 through a pinion gear 55 and a ring gear 56.;COPYRIGHT: (C)2006,JPO&NCIPI