CONTROL DEVICE FOR SHUTTER OPENING/CLOSING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a control device for a shutter opening/closing apparatus of mechanical constitution for controlling a shutter to automatically descend at the outbreak of a fire and to stop at the bottom dead center. SOLUTION: This control device for the shutter opening/closing apparatus is composed of a solenoid 13 actuated receiving a signal from a smoke sensor; a closing cam 18 projected by spring force interlocked with the motion of a plunger 14 of the solenoid, to push a brake lever 20 to release a brake; a disc 24 rotating interlocked with the rotation of a winding shaft 2 of the shutter 1; a stop trigger lever 26 swinging being hit by a pin 25 fitted to the disc; a reset lever 33 slid by spring force to retreat the closing cam 18 intrlockingly with the swing of the stop trigger lever; and an origin reset lever 32 fitted to the disc 24 to reset the stop trigger lever 26 into the original position by rotation following the ascent of the shutter 1.