| 摘要 |
PROBLEM TO BE SOLVED: To suppress useless wings of a vehicle body which gives the operator a uncomfortable feeling when loading/unloading apparatus is in operation. SOLUTION: The weight W of the load is determined by a pressure sensor 65 which senses the oil pressure of a lift cylinder 22, while revolving speed sensors 66a and 66b for the driving wheels sense the revolving speed ND of the rear wheels, and a reach switch 62 senses that a reach lever 42 is operated to the forward side or reverse side. A controller 67 judges whether the vehicle is at a standstill in the loaded condition, and if yes, the controller stops the current feed to a solenoid valve for locking in the period till the preset time elapses since the reach signal SRH emitted by the reach switch 62 was input and in the period till the specified time will have elapsed since the reach signal SRH is no more input. The operation of a lock cylinder 36 is restricted so that the operation of each suspension mechanism 27 is restricted.
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