| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lift device with a simple structure, without projecting an obstructive part above a frame even in a state of erecting a support leg upright. <P>SOLUTION: Two parallel link mechanisms formed above and below a first horizontal link member 7 are deformed in a line symmetry state across the first horizontal link member 7, and one support leg 4 constituted of one upper link member 5 and lower link member 6 positioned on the same side side surface of the frame 2 and another one support leg 4 constituted of the other upper link member 5 and lower link member 6 positioned on the same side side surface as the one support leg, are synchronously bent and stretched. By constituting the frame 2 for moving in the vertical direction by synchronously bending and stretching the right and left four support legs 4 by simple operation such as synchronously operating support leg bending-stretching hydraulic cylinders 9 of both right and left side surfaces of the frame 2, an upward projection object of the frame 2 is eliminated, and manufacturing cost is reduced by simplifying a structure of the lift device 1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
