| 摘要 |
<p>PURPOSE:To attain simple constitution and the countermeasures to power saving with efficient use of delivered power, by forming at least one gear of a gear transmission mechanism as an eccentric gear and changing the reduction gear ratio before and after the loading. CONSTITUTION:The 3rd small diameter of reduction gear is formed with eccentricity to a main gear cam 41 so that the gear reduction ratio is maximized in bringing a left or a right pinch roll (51 or 52) abut on a left or a right capstan (53 or 54) by shifting a reproducing slider 47. Thus, the load of the main gear cam 41 starts increasing from a position where the left or the right pinch roll (51 or 52) is brought to abut on the left or the right capstan (53 or 54), abut 69 deg. in rotary angle theta, and the load is maximized at a position (about 80 deg. of rotary angle theta) where the said left or the right pinch roll (51 or 52) is finished to be brought to abut on the left or the right capstant (53 or 54).</p> |
