| 摘要 |
PROBLEM TO BE SOLVED: To prevent stop of an operation for a long time at the time of changing a printed matter by replacing a plate cylinder at a lower position while printing with the cylinder disposed at an upper position with an impression cylinder to be retracted upward at the time of no necessity. SOLUTION: A film (a) is urged to a plate cylinder 3 of an upper position of three plate cylinders 3 by an impression cylinder 4 and printed. At the time of replacing the cylinder 3, an oscillating plate 45 is tilted down by extending a piston rod 44 of an air cylinder 43, and an ink supply roller 46 is separated from the cylinder 3. And, when replacement of the cylinder 3 is finished, it is returned to the original position together with an ink receiver 62. When one printing is finished, the cylinder 4 and a doctor 5 are retracted upward, and an indexing rotary plate 10 is rotated at 120 by rotation of an indexing rotary motor. And, the cylinder 3 disposed at a printing position is moved to a cleaning position, the cylinder 3 disposed at the cleaning position is moved to a replacing position, and a new plate cylinder 3 mounted at the replacing position is moved to a printing position. |
