| 摘要 |
PROBLEM TO BE SOLVED: To surely allow a suspending cargo to freely fall at a sufficient high speed particularly in a light load. SOLUTION: In a free fall, a free fall speed increasing signal is sent to a parking control valve 59 from a controller 61 by ON of a changeover switch 71 operated by a pedal, and the free fall speed increasing action is provided by lowering and rotating a hydraulic motor 32 by operating the valve 59. At this time, a lowering speed is changed in response to an operation quantity of a brake pedal 51. COPYRIGHT: (C)2005,JPO&NCIPI
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