WORKING BASE ELEVATING DEVICE FOR VEHICLE FOR HIGH LIFT WORK

摘要

PROBLEM TO BE SOLVED: To provide a working base elevating device for vehicle for high lift work, which can elevate a working base for movement straight or nearly straight in relation to a tip of a boom. ;SOLUTION: A working vehicle for high lift work, which is provided with a working base in a tip of a boom, is provided with a first parallelogram link system 61, which is formed of pivotal fulcrum A, B, C, D, a second parallelogram link system 62, which satisfies the relation that a side AB = a side BE, a third parallelogram link system 63, which is formed of pivotal fulcrum G, H, I, B, a guide means 42 for supporting the pivotal fulcrum H freely to be displaced in the vertical direction in parallel with a side AD, and a moving means 43 for moving the pivotal fulcrum H along a guide means. A side AG and a side GH are formed at the same dimension, and any one of the pivotal fulcrum A, D and the pivotal fulcrum E, F are supported by the tip of the boom freely to be turned, and the other thereof are supported by a work base 5 freely to be turned.;COPYRIGHT: (C)1998,JPO