Normally open assembly of emergency fire door

Abstract

The invention provides a normally open assembly of an emergency fire door. The normally open assembly comprises fire door normally open devices (200) used for restricting fire door body (100) from closing during opening of the fire door body (100), the two sets of the fire door normally open devices (200) correspond to two door panels of the fire door body (100) respectively, the fire door normally open devices (200) include limiting normally open mechanisms (210), and reset closing mechanisms (220), the limiting normally open mechanisms (210) are used for restricting the closing of the fire door body (100) during the opening, and the reset closing mechanisms (220) are used for making the limiting normally open mechanisms (210) to cancel the restriction on the fire door body (100). According to the normally open assembly, closing of a fire door can be limited after people push open the fire door, that is, the fire door remains a opening state after being pushed open, when a fire occurs, only the first person needs to open the fire door, subsequent evacuees can quickly pass through and escape, and the escape efficiency is higher.

Description

technical field [0001] The invention relates to the field of fire protection, in particular to an assembly for keeping a fire door in a normally open state. Background technique [0002] Fire doors are the last protective barrier for life and property. Fire doors are generally installed in buildings. The main purpose of fire doors is to prevent fires from spreading in case of sudden fires. Most fire doors on the market will be equipped with door closers. When a fire breaks out, people need to manually push the fire door to escape, but after the person in front lets go, the door closer will automatically close the fire door, and the people behind need to continue to push the fire door, which is very difficult for people. Escape brings great inconvenience. Therefore, it is necessary for the present invention to provide a device that keeps the fire door open after being pushed open, which can restrict the closing of the fire door after the fire door is pushed open. After being...

AI Technical Summary

Problems solved by technology

[0002] Fire doors are the last protective barrier for life and property. Fire doors are generally installed in buildings. The main purpose of fire doors is to prevent fires from spreading in case of sudden fires. Most fire doors on the market will be equipped with door closers. When a fire breaks out, people need to manually push the fire door to escape, but after the person in front lets go, the door closer will automatically close the fire door, and the people behind need to continue to push the fir

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