| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect a rotation amount of a flag member using a photosensor and the flag member, and to obtain the type behavior information of a sheet material that can be obtained from the flag member. <P>SOLUTION: The sheet material detection apparatus includes: a first light shielding part 21b that is provided in the flag member 21 to shield a light path of a first photosensor 22; and a second light shielding part 21c that is provided in the flag member 21 to shield the light path of a second photosensor 23. The sheet material detection apparatus detects the rotation amount of the flag member 21 by a CPU 27 based on the first and second photosensors 22, 23. <P>COPYRIGHT: (C)2012,JPO&INPIT |
