| 摘要 |
A collapsible revolving door is described and includes upper and lower latching mechanisms which normally retain leaves of the door in radially disposed, angularly spaced positions but which allow the leaves to collapse flat against one another in the event that abnormal forces are applied thereto. Each latching mechanism includes one latch member for each leaf. The latch member is mounted on a pivot pin for the leaf so that the latch member will turn with the leaf from a normal radial position to a collapsed position. The latch member is retained in its normal position by spring biassed detents which will release when abnormal forces are applied to the associated leaf.
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