| 摘要 |
A manually operated roll door. The door comprises a flexible door panel that is coiled on a drum located above the header of a doorway in a building, and the door panel is manually movable between an open position where the door panel is coiled on the drum, to a closed position where it encloses the doorway. A latch mechanism is associated with the door panel and automatically latches the door panel in the closed position. A handle is attached to the lower end of the door panel and the handle is connected to the latch mechanism in a manner such that an upward pull on the handle to open the door panel will simultaneously release the latch mechanism. A counterbalancing weight is operably connected to the door panel and partially counterbalances the weight of the door panel to aid in manually moving the door panel to the open position.
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