| 摘要 |
<p>A mechanism for adjusting a roller type stock guide includes a cylindrical nut including two tubular sections (45, 46) having theraded connections of opposite hands with a pair of threaded connections of opposite hands with a pair of threaded shafts (15, 16) being arranged between two roller holders (2, 3) and turnable for moving the threaded shafts (15, 16) in opposite directions thereby to vary the distance between the guide rollers (4, 5). For manually adjusting the guide rollers (4, 5) easily and in one operation a ratched type driving mechanism is provided which includes a ratched wheel (44) formed around the cylindrical nut (45, 46) integrally therewith, a pair of ratchet paws movable into and out of meshing engagement with the ratchet wheel (44) in alternate fashion under the action of a manually operable control cam (19), and a notching lever handle (60) manually operable to turn the ratchet wheel (44) and cylindrical nut (45, 46) in an intermittent fashion through the intermediary of either one of the ratchet pawls as placed in mesh with the ratched wheel (44).</p> |
