| 摘要 |
<p>PURPOSE:To efficiently feed paper sheets by selectively driving each paper feeding roller shaft which is oppositely aranged onto the both paper feeding boards of a copying machine having the upper and the lower paper feeding boards in two stages by a reversible motor through a one-way clutch. CONSTITUTION:When copying operation is started by selecting the feed of copying paper-sheets from an upper-stage paper feeding board 24, a stepping motor 20 revolves clockwise at a low speed with a prescribed timing, and further revolves at high speed. Then, a sprocket 28 revolves clockwise, and turns the shaft 21 of a paper feeding roller clockwise through a one-way clutch 26, and then a copying paper-sheet is transported by a paper feeding roller 23. At this time, a sprocket 29 revolves counter clockwise and is idly revolved with respect to the sahft 22 of a paper feeding roller by a one-way clutch 27. On the other hand, when a copying paper is transported from a lower-stage paper feeding board 25, the stepping motor 20 is revolved reversely, and only the shaft 22 of the paper feeding roller is revolved reversely to the above-described operation, and copying paper sheets are transported.</p> |
