| 摘要 |
A cassette library apparatus and a posture control method thereof are provided. A swing arm ( 16 a) is capable of chucking or releasing a cassette ( 1 ) by getting into a recessed part ( 10 a) of the cassette ( 1 ) and getting out of the recessed part ( 10 a) when a swing frame ( 34 ) swings up and down. The apparatus includes a swing mechanism ( 47, 48 ) for swinging the swing frame ( 34 ) and the swing arm ( 16 a), a stepping motor ( 45 ) for driving the swing mechanism ( 47, 48 ), a device ( 51, 52 ) which detects the swing arm ( 16 a) being in a specific posture, and a device ( 55 ) which detects the posture of the swing arm ( 16 ) by counting a number of pulses supplied to the stepping motor ( 45 ) when the posture of the swing arm ( 16 a) is changed from the specific posture by drive of the stepping motor ( 45 ).
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