FIRE DOOR CLOSER

摘要

PURPOSE: An automatic door closing device of a smoke control zone, which integrally includes a driving part and a control part, is provided to automatically close a fire door and an entrance according to a fire detection signal. CONSTITUTION: An automatic door closing device of a smoke control zone comprises a driving part and a control device. The driving part has a spring support part, a spring pressurization part, a pressing bar, a motor support part and an operation bar. The spring support part has a pressure projection. The spring pressurization part pressurizes a spring. A pressing bar pressurizes the spring pressurization part. The motor support part fixes a motor(31) and a speed reducer(32). The operation bar senses the location of the spring pressurization part. The control device operates the driving part.