| 摘要 |
A collapsible scaffold assembly is provided, having a number of relatively movable frame members connected to form a frame, and an adjustable flexible tension member extending between at least two of the frame members. Adjustment of the tension member, for example, by shortening of the effective length of the member, causes relative movement of the frame members and so erects or collapses the scaffold assembly. In preferred embodiments, the flexible tension member is associated with pulley members mounted on a pair of rigid elements, which in turn are mounted to the frame members. Increasing tension of the tension member drives the pulleys apart, causing the frame to erect. |
