| 摘要 |
A lifting apparatus has a movable chassis (101), a vertically movable platform (116) disposed over the chassis and a vertically swingable, telescopic boom body (113) connected between the chassis and the platform. The chassis, boom body and platform are arranged to form a Z-shape in side view. A detecting mechanism (168, 239) for monitoring the movement of the platform includes a winding drum (160, 167, 263), and a detection wire (156, 162, 238) wound on the winding drum and having an end fixed to the platform. The boom body is extended at a rate correlated to the angle of inclination of the boom body so that the platform remains horizontal while moving vertically relative to the chassis.
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