Orderly-closing type double-leaf opposite-opening fireproof door

Abstract

The invention provides an orderly-closing type double-leaf opposite-opening fireproof door. An installation box is arranged on the top of a door frame. Sliding mechanisms, a stop block, a constraint mechanism, a limiting mechanism and a triggering device are arranged in the installation box. The sliding mechanisms comprise the left sliding mechanism and the right sliding mechanism which are symmetrically arranged in the left-right direction. Door leaves overcome assistance of a door closing device so as to start rotating and can synchronously drive movable parts in the sliding mechanisms to get away from each other to slide, rotation of the door leaves is closed so that the movable parts in the sliding mechanisms can be synchronously driven to get close to each other to achieve sliding reset, and the stop block can limit sliding reset of the movable part in the right sliding mechanism so that the stop block can release the limitation after the movable part in the left sliding mechanismcompletely resets. By means of the scheme, the orderly-closing type double-leaf opposite-opening fireproof door has the beneficial effects that the left door can be automatically closed firstly underthe assistance effect of the door closing device, the right door is then closed, the pressing edge on the right door can be tightly pressed on a step of the left door, and the sealing performance ofthe left door and the right door during closing is ensured.

Description

technical field [0001] The invention relates to a fire door, in particular to a sequentially closed double-leaf fire door. Background technique [0002] Fire doors refer to doors that can meet the requirements of fire resistance stability, integrity and heat insulation within a certain period of time. In addition to the function of ordinary doors, it also has the function of preventing the spread of fire and smoke. It can prevent the spread of fire within a certain period of time and ensure the evacuation of personnel. After searching by the applicant, it is found that at present, the existing split-type fire protection The door mainly includes a door frame, a left door leaf, a right door leaf and a door closer. In order to ensure that the left leaf door and the right leaf door can maintain airtightness, the existing left leaf door is provided with a step near the end face of the right leaf door, and the right leaf door is close to the left door. One end of the door is prov...

AI Technical Summary

Problems solved by technology

[0002] Fire doors refer to doors that can meet the requirements of fire resistance stability, integrity and heat insulation within a certain period of time. In addition to the function of ordinary doors, it also has the function of preventing the spread of fire and smoke. It can prevent the spread of fire within a certain period of time and ensure the evacuation of personnel. After searching by the applicant, it is found that at present, the existing split-type fire protection The door mainly includes a door frame, a left door leaf, a right door leaf and a door closer. In order to ensure that the left leaf door and the right leaf door can maintain airtightness, the existing left leaf door is provided with a step near the end face of the right leaf door, and the right leaf door is close to the left door. One end of the door is provided with a pressure edge that is pressed against the steps. The advantage of this setting is that the left door and the right door can be tightly combined when closed, and there is no gap, which can improve the fireproof and smoke-proof performance of the fire door. The disadvantage is that when the fire door is opened and then closed, the left door must be closed first, and then the right door must be closed to make the edge press fit on the steps, otherwise the edge will cause the left door to fail to close, making the fire door In order to overcome the disadvantages of preventing fire and smoke, it is necessary for the present invention to provide a sequentially closed double-leaf fire door with ingenious structure and simple principle, which can automatically realize the first closing of the left door and the closing of the right door.

Images