| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently adjust a takeout position for the robot hand of an accessor, cell by cell, while determining the cell takeout position of the robot hand of a library device. <P>SOLUTION: An illuminator 136 is installed having its optical axis passing the center 135 of rotation of a drum rotary shaft 130 and the center 137 of a cell 64 on its opening part side. A photodetector 140 increases in the angle of incidence of incident light 146 from the center axis of a cylinder member 142 to the right and left and then can detect only incident light within a range ofΔθfrom the center optical axis 146 to the right and left while light which passes through an opening end of the cylinder part 142 and is incident at≥148°does not impinges on a photodetection part 144. The detecting function of the photodetector 140 for an angle of incidence is used to detect the angle of rotation of a cell drum 10. <P>COPYRIGHT: (C)2003,JPO</p> |
