| 摘要 |
PURPOSE:To simply and quickly adjust the vertical position of a stopper by vertically moving the stopper under the guidance of a slant groove and a vertical sliding guide groove. CONSTITUTION:When a stopper device 12 moves in a sliding manner slong guide rails 7a and 7b by operation of mobile guiders 3 and 4 with slant grooves 3a and 4a by oil-pressure cylinders 5 and 6, a stopper 10 is vertically moved under guidance of the slant grooves 3a and 4a and the vertical sliding guide grooves 1a and 2a of fixing guiders 1 and 2, whereby permitting the vertical positions of the stopper 10 and a leg rack D to be adjusted simply. When, after adjusting the height and position of the stopper 10, the stopper 10 is moved in the direction of the leg rack D by an operation mechanism 12, the projected coupling tip 11 of the stopper 10 is coupled with one toothed portion of a rack gear. Thus, the positioning of the working platform can be exactly performed when it erects. |
