Double-leaf fireproof door closing sequencer

Abstract

The invention discloses a double-leaf fireproof door closing sequencer which comprises a fixed door, a passing door and a door frame, the outer sides of the fixed door and the passing door are hingedto the door frame, two automatic door closing devices are arranged on the upper portion of the outer side of the door frame and connected with the fixed door and the passing door through traction rodsrespectively, and a handle is arranged on the outer side of the passing door. A sealing edge is arranged on the edge of the fixed door and covers the outer side of the passing door, two limiters arearranged on the upper portion of the inner side of the door frame, sliding shafts are arranged in the limiters, the sliding shafts penetrate through the two limiters, the right ends of the sliding shafts are connected with limiting switches, and the sliding shafts are sleeved with elastic pieces. Under the condition that an existing fireproof door is not damaged and replaced, sequential opening and closing required by the national standard are achieved, noise is reduced, the service life of the fireproof door is prolonged, the technical problems existing in the prior art are solved, and the ideal effect is achieved by installing the double-leaf fireproof door closing sequencer on the fireproof door and a door frame.

Description

technical field [0001] The invention belongs to the technical field of fire doors, in particular to a door closing sequencer for double fire doors. Background technique [0002] According to GB 50877-2014 "Code for Construction and Acceptance of Fire Rolling Shutters, Fire Doors, and Fire Windows", "Double-leaf doors should be installed with a sequencer". [0003] In consideration of cost, many existing fire doors often only set the airtight edge at the closed position of the fixed door to realize sequential switching. Due to the existence of the airtight edge, if the passage door is closed first and then the fixed door is closed, it will be blocked by the airtight edge on the fixed door. and cannot be closed. [0004] The solutions in the prior art have the following technical problems. When the door is fixed and then closed, the airtight edge collides with the passage door quickly, causing huge noise, disturbing the residents, and adversely affecting the service life of t...

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Problems solved by technology

[0003] In consideration of cost, many existing fire doors often only set the airtight edge at the closed position of the fixed door to realize sequential switching. Due to the existence of the airtight edge, if the passage door is closed first and then the fixed door is closed, it will be blocked by the airtight edge on the fixed door. instead of closing

[0004] The solutions in the prior art have the following technical problems. When the door is fixed and then closed, the airtight edge collides with the passage door quickly, causing huge noise, disturbing the residents, and adversely affecting the service life of the fire door.

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