Hard fast door

• Main Authors: SHI DONGXU, LIN YAO, SHI GUOWANG
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2022
• Subjects: COFFEE MILLS; DOMESTIC ARTICLES OR APPLIANCES; DOMESTIC WASHING OR CLEANING; DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; FIXED CONSTRUCTIONS; FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES; FURNITURE; HUMAN NECESSITIES; LADDERS; SPICE MILLS; SUCTION CLEANERS IN GENERAL

The utility model discloses a hard fast door which comprises a roller shutter, a rolling shaft, a motor, two door columns and an electric cabinet, the number of the door columns is two, the two door columns are oppositely arranged on the left side and the right side of the roller shutter, and guide rails are arranged on the opposite side walls of the door columns; the roller shutter is wound on the reel, a sliding wheel is fixed on the side surface of the roller shutter, and the roller shutter is in rolling connection with the guide rail through the sliding wheel; the reel is connected with the motor, the motor and the electric cabinet are arranged at the top of the right door post, a smoke alarm and an audible and visual alarm are arranged on the upper portion of the back face of the left door post, a mounting cavity is formed below the audible and visual alarm, and a dry powder extinguisher is placed in the mounting cavity. A temperature sensor is arranged on the back face of the right door column, a cleani