| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve positioning accuracy, when an accessor is moved to a specified cell, by using a positioning flag with plural holes made on the base plate and simplifying the required mechanism. SOLUTION: The positioning mechanism is constituted of a positioning flag 6 and a positioning sensor 7. This flag 6 is such that a number of holes are made in plural lines on the base plate and that the individual cell in a cartridge storage part is detected by the combination of these holes. Positioning is done, with the position of the accessor 4 discriminated through the combination of different signals, which are generated by simultaneously detecting, with plural reflection type photosensors 8, the holes of the positioning flag 6 and the part that are not. The surface with the holes of the positioning flag 6 is inclined against the horizontal and, also inclined accordingly is the attaching surface of the reflection type photosensor 8 of the positioning sensor 7. There are no projections on this surface; hence, no falling objects reside there, with no movement of the accessor 4 prevented.</p> |
