| 摘要 |
PURPOSE:To automatically adjust an image position in a plate with precision in a short period by controlling a pressure barrel with the assistance of a control part and a rotary angle detector in such manner that the said barrel may be driven to rotate at a required movement value. CONSTITUTION:If an input part 13 received an input under a state where each barrel 2, 3, 4 is stationary, an electromagnetic brake 10 and an electromagnetic clutch 9 are not electrically turned on and a rubber barrel 3 is fixed by means of an electromagnetic clutch 10 and released from a gear 36, rotating a gear 26 with the rotation of a motor 11. Accordingly, a gear 4a is turned, rotating only a pressure barrel 4. Thus a peripheral direction position relationship with the rubber barrel 3 is changed. If the pressure barrel 4 is turned in this way, a rotary position is input to a control part 12 by means of the rotary angle detector 14, the motor stops when the rotary position coincides with a value input beforehand, cutting off an electric supply to the electromagnetic brake 10 and clutch 9 and supplying an electricity to the clutch 8. As a result, the rubber barrel 3 is freed from fixing, being connected to the gear 3b and the rubber barrel 3 and the pressure barrel 4 are connected, thus maintaining a peripheral direction position relationship between them and readying a printing operation after adjustment of an image position. |
