CRIME PREVENTION DEVICE OF DOOR

摘要

PURPOSE: A security system for a fire door is provided to prevent a fire door from being forcibly opened using a claw hammer or a large screwdriver by inserting a fixing pin into the fire door. CONSTITUTION: A security system for a fire door comprises a Π-shaped latch which is installed inside a door frame (20). The latch rotates around a hinge (51) and comprises a pushing pin (52) and a fixing pin (53). The pushing pin is pushed to the inside of the door frame by a locking protrusion (32) protruded when closing a fire door (10) and locking a door lock (30). The fixing pin is inserted into the fire door by being protruded to the lateral side of the door frame when the pushing pin is pushed.