WORK RANGE RESTRICTING DEVICE OF BOOM ON THE TIP SIDE USED FOR VEHICLE FOR HIGH LIFT WORK

摘要

PROBLEM TO BE SOLVED: To provide a work range restricting device of a boom on the tip side capable of reducing the twisting force acting on a boom on the base end side, and capable of reducing the weight and the manufacturing cost of the boom on the tip side by the reduction of the twisting force.;SOLUTION: In the vehicle for high lift work, the boom on the base end side to be driven for changing form is attached to the tip of the boom on the base end side via a revolving member, and a work bench is attached to the tip of the boom on the tip side. The vehicle for high lift work comprises a revolving member revolving angle detecting means 9, the boom on the tip side up/down derricking angle detecting means 10, a boom on the tip side deformed state detecting means 11, and a restriction signal outputting part 12 for receiving detection signal from these detecting means 9-11 and outputting restriction signals to respective drive control device of a revolution drive device 5-1 of the revolving member, a derricking drive device 6-1 of the boom on the tip side, and a form changing drive device 6-2 of the boom on the tip side. Therefore, the allowable work radius R2 for operating the boom on the tip side, when the revolving member is revolved so that the up/down locus plane of the boom on the tip side orthogonally crosses the up/down locus plane of the boom on the base end side, is restricted to be small.;COPYRIGHT: (C)2002,JPO