Fire and smoke rated fabric door

摘要

A vertically coiling door assembly that is used for emergency egress. Upon notice of a predefined alarm state, after a delay the door deploys by gravity, stopping upon contact with an obstruction. The door may be lifted at any time without power and after a set amount of lift powered movement is triggered moving the door to a preset height, pausing the door at that height, and then resuming gravity deployment. In the total absence of power the door may still be lifted, with resumption of gravity deployment upon removal of the lifting force.

主权项

1. An overhead coiling door system comprising:
a vertically coiling curtain operatively contained within vertically oriented side members and operatively connected to a counterbalance assembly and an operational assembly; wherein
the counterbalance assembly comprises a counterbalance barrel supported at each end by a securing member;the operational assembly comprises a powered operating system comprising an operator comprising a controller, releasing device, continuously charged backup power supply and drive motor assembly;release of the door is delayed for a first predetermined period of time upon receiving notice of a predefined emergency alarm condition;the releasing device is released after the first predetermined period of time allowing the door to deploy by gravity at a predetermined rate;the gravity deployment is stopped upon door contact with an obstruction;gravity deployment is continued at the predetermined rate upon removal of the obstruction;the door is capable of being lifted without power at any time with less than a predefined amount of emergency egress lifting force and after the door is lifted a predetermined amount a power engagement is triggered to power move the door to a predetermined minimum escapement area;the door is paused at the predetermined minimum escapement area for a second predetermined period of time; andthe door is allowed to once again deploy by gravity at the predetermined rate after the second predetermined period of time; andlifting capability of the door without power with less than a predefined amount of emergency egress lifting force is available at any time upon loss of the operating power, with resumption of gravity deployment at the predetermined rate upon removal of the emergency egress lifting force.