| 摘要 |
<p>Low rise trolley (1) transports palletised cargo (12-18 metres in length and weighing in excess of 30 tonnes) to and from shipping containers. Spacing of trolley forks (2) from a container sidewall is maintained by sensors (220-221) incorporated in fork (2). If trolley (1) diverges from the preset spacing, an electronic control system activates small hydraulic rams (with 8mm stroke) angling (by ± 0.75°) rollers supporting forks (2) so as to steer the trolley to maintain the spacing. Scanning a reflector guard whose profile matches that of the (corrugated) container sidewall may input the pre-set spacing.</p> |
