| 摘要 |
A personnel hoist comprises a mast (11) supported on a ground engaging base (not shown). The mast (11) is formed from a number of mast pieces (11a, 11b, 11c) which are secured together by connecting members (42 and 43). A number of mast pieces are selected so as to reach a desired height. The mast pieces are provided with rack sections (57) which form a continuous rack. A platform (30) is connected by a box section (31) to an operating mechanism (32). The operating mechanism (32) includes a pair of handles (80 and 83) which rotate a pinion (74) which engages the rack section. A pair of rollers (100 and 101) engage the opposite side of mast (11). In operation, the handles (80 and 83) are operated to raise and lower platform (30) and each additional mast piece may be mounted in position by a user standing on platform (30). |
