| 摘要 |
A panic exit door locking mechanism adapted particularly for mounting on a narrow stile door frame, and which includes top and bottom bolt mechanisms respectively at the upper and lower ends of the tubular frame at the swinging edge of the door, the locking instrumentalities including a rotatable lever arrangement concealed within the tubular stile, and being connected to the bolt mechanisms by concealed rod structures that are length adjustable for doors of different heights. Actuators for the rotatable lever arrangement comprise a manually operable panic exit actuator device mounted on the inner side of the door and/or a conventional key-controlled rotatable cam lever having a lost motion relation with the rotatable lever arrangement. The bottom bolt mechanism has a conventional reciprocable bolt, while the top bolt mechanism has a fixed bolt mounted on the door header, this bolt being utilized to actuate associated latching mechanism carried by the door to a bolt-latching position when the door is closed, and to a non-latching position when the door is open, movements of the latching mechanism being further utilized to control the operation of associated dogging members so as to dog the latching mechanism with respect to the top bolt, when the door is closed, and to dog the bottom bolt in retracted position when the door is opened. |
