| 摘要 |
PURPOSE:To enable the parts to be driven to lift and descend positively, by connecting the driving parts and the driven parts with a positive lifting mechanism containing pulleys and a couple of strings. CONSTITUTION:A couple of strings 19a, 19b are fixed to pulley 18 at one end with bolts 20, respectively and the other end, through bars 21a, 21b to ring rail 22. A pair of belts 28a, 28b are fixed to pulley 27 at one end and the other, through bars 34a, 34b to lappet angle, respectively. The parts to be driven can be positively brought up and down by means of a couple of the strings. |
