WORKING VEHICLE

PROBLEM TO BE SOLVED: To solve such a problem that rear wheels supported by front and back rollers and front wheels, and traveled and driven may be floated in the air without contacting the ground, so that they cannot be traveled or driven, when the rear wheels are positioned at the indentation of the ground and the front and back rollers and the front wheels are positioned at the indentation at the time of operation while bringing four roller jacks on the ground and moving the vehicle. SOLUTION: A working vehicle is mounted on a vehicle 1, and four outriggers 4 providing with ground plates 5 at bottom ends and supporting the working vehicle on the ground are arranged at front, back, right and left positions of the vehicle. Rollers 6 can be arranged only on two front outriggers 4a instead of the ground plates 5, and the ground plate 5 of the respective outrigger 4 is brought into contact with the ground, so as to support the working vehicle. When the operation is done while the working vehicle is traveling, the roller 6 is arranged on the bottom end of the outrigger 4a, and only the outrigger 4a is pulled out within a range not to float the front wheels 2, and the working vehicle is supported on the ground by the roller 6, so as to drive and travel the vehicle 1. COPYRIGHT: (C)2007,JPO&INPIT