| 摘要 |
A collapsible tubular structure (1, 22) is provided comprising a peripheral, generally circular, end frame (2, 11, 12, 28, 32) at each end of the structure in the erected condition, at least two and generally three or four angularly spaced, rigidly flexible, longitudinal frame members (4, 15, 29, 33) extending between the two end frames, and a flexible side wall (6, 19) having end edges held in association with each of the two end frames. The structure is characterized in that the ends of the longitudinal frame members are held in association with the end frames in an articulated manner and in that retaining means are provided for releasably holding the elongate frame members in the erected condition relative to the end frames. The length of the longitudinal frame members is of the same order as, or less than, the effective cross-sectional dimension of the tubular structure and this enables the structure to be collapsed by rotating the one end frame relative to the other with consequent pleating of the sidewall between the two end frames; possible bowing of the longitudinal frame members; and collapsing of the container to a position in which the elongate frame members extend approximately diametrically across the juxtaposed end frames. |
