| 摘要 |
<p>PURPOSE:To enable a positioning of a loading ring without backlash at the loading position by a simple mechanism. CONSTITUTION:The loading ring 5 is freely rotatably held by plural guide rollers 39a, 39b, 39c, and a lock lever 42 freely rotatably mounted on this loading ring 5 is made so as rotatably pressed by a leaf spring 44 in the pressing direction to the guide roller 39a. The mechanism is characterized by positioning the loading ring 5 to the loading position without backlash in such a manner that the lock lever 42 is pressed on the peripheral surface of one guide roller 39a by the leaf spring 44 when the loading ring 5 is rotated up to the loading position from the unloading position.</p> |
