| 摘要 |
PCT No. PCT/GB88/01085 Sec. 371 Date Oct. 10, 1989 Sec. 102(e) Date Oct. 10, 1989 PCT Filed Dec. 12, 1988 PCT Pub. No. WO89/05390 PCT Pub. Date Jun. 15, 1989.A folding step structure (7) comprises an elongate base (11) to be laid on or parallel to a ground surface (1); a frame (15) connected to the base; a step (14) connected to the frame such that the frame and the step member are together pivotal, about pivot points (20, 21) towards one end of the base, between a first limit position in which the step is parallel to, and closely spaced from, the ground surface at a location towards the other end of the base, in which limit position the frame is closely adjacent the base, and a second limit position in which the step is supported above the base; and a bracing strut (24) for securing the step and the frame in the second limit position.
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