| 摘要 |
PCT No. PCT/AU84/00181 Sec. 371 Date May 13, 1985 Sec. 102(e) Date May 13, 1985 PCT Filed Sep. 14, 1984 PCT Pub. No. WO85/01259 PCT Pub. Date Mar. 28, 1985.A wheeled trolley frame for use on an escalator. The frame has two ends and two pairs of ground engaging wheels (2 and 3) respectively positioned one pair adjacent each frame end and spaced apart so that both pairs of wheels cannot sit on a single escalator step tread. First and second escalator tread engaging means (4 and 5) on the frame respectively positioned adjacent the wheel pairs and intermediate the wheel pairs. The tread engaging means are spaced apart so that they cannot rest on the same escalator tread and lie above ground level and are spaced therefrom by a distance such that they will when the trolley frame is mounted on a formed escalator engage on two treads of the escalator and maintain the wheels adjacent the tread engaging means elevated from the escalator step treads. |
