| 摘要 |
PROBLEM TO BE SOLVED: To improve the operability by solving the problems caused by forgetting the turning on of a rear-lifting switch by unconditionally carrying out the rear lifting by an operation part when a machine body is operated backward when the operation is carried out while turning on the operation clutch even if the on-off switch of the rear-lifting is in the off state because the turning on of the on-off switch for the rear-lifting before the operation is sometimes forgotten, and the problem of causing unexpected damage by the operation part biting into soil when going backward while lowering the operation part. SOLUTION: The operation part is installed so as to be lifted and lowered based on a traveling body, and a rear-lifting means for automatically lifting the operation part by the going backward operation of the machine body is also installed. When the rear lifting-switching switch 25 is in a turned off state of the rear lifting, the operation part is controlled so as to be automatically lifted when the machine body is operated so as to go backward under operation in the turning-on state of the operation clutch 16. COPYRIGHT: (C)2009,JPO&INPIT
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