| 摘要 |
A collapsible revolving door in which a plurality of leaves (32, 34, 36) are mounted to an upper cam housing (52) and a lower cam housing (56) for rotation about a central axis. Each of the leaves is mounted to a cam (80) through a pivot shaft (60) for rotation about a central axis of the cam (80) and the pivot axis (60). Each cam (80) has substantially opposed engaging sockets (84, 86) and substantially opposed collapsing sockets (88, 90). Dentent mechanisms (92) have semispherical cam followers (96) which are positioned in the engaging sockets (84, 86) when the leaves are radially oriented about the central axis. Under panic conditions, the door leaves (32, 34, 36) rotate about the pivot shafts (60) against the retaining force of the detent mechanism (92), whereby the detent mechanisms will register with the collapsing sockets (88, 90). Adjustment blocks (98) are adjustable mounted in the housing (52, 54) to simultaneously adjust the bias on two adjacent detent mechanism springs (94).
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