| 摘要 |
<p>PURPOSE:To enable the stable cassette loading and unloading with a simple constitution by providing non-toothed parts on gears of one set in a power transmission mechanism and releasing a spring deflection by these non-toothed parts at the time of the vertical transfer. CONSTITUTION:In the power transmission mechanism 18, one set of intermeshing gears A11 and B13 are provided and the gears are formed of non-toothed wheel sections 11a, 13a and 13b. A specific spring is provided between a gear 12 meshing the gear A11 and the gear B13 to energize a holder for ejection. When the holder is moved horizontally, this spring is energized and then at the time of the vertical movement, the gears A11 and B13 are dismeshed at the toothless parts 11a and 13a, and hence the spring deflection is released away. For this, the stable loading and unloading can be performed without dislocating the relative position of a cassette 2 and the holder.</p> |
