| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform the carry-in of a following sheet at the time of reversely rotating a carrying roller so as to perform the image forming processing at a high speed by controlling the sheet material carrying force by a reverse carrying roller with a change-over operation. SOLUTION: When a flapper 14 having a roller 15 as a rotating member at a position opposite to a reverse carrying roller 16 is switched to a carrying passage to a face-up discharging port, the roller 15 is made to abut on the reverse carrying roller 16. When the flapper pipe 14 is switched to a carrying passage to a face-down discharge port 26, the roller 15 is separated from the reverse rotating carrying roller 16. With this structure, since the roller 15 can be separated from the reverse carrying roller 16, even in the cease where the reverse carrying roller 16 is rotated in the opposite direction of the carrying roller 11, carry-in of a following sheet can be performed. Namely, when a following sheet material exists, a tip of a former sheet material, which is switched for back, is detected by a sensor, and thereafter, the flapper 14 is switched to a real line position, and a following sheet can be led in.</p> |
