| 摘要 |
PURPOSE:To prevent the vibration of a printing press due to the axial reciprocating movement of an ink roller by dividing the ink roller reciprocally moved in its axial direction into two groups and making the sum of the inertial forces in the axial direction of the ink rollers of the respective groups almost zero. CONSTITUTION:When a plate cylinder P is driven by operating a rotary press, the metal rollers 1, 2 constituted so as to have almost equal mass of an inking arrangement are rotated at a speed almost same to the peripheral speed of the printing plate provided to a plate cylinder P through a rotary drive system G and axially reciplocally moved in mutually opposite directions at an equal cycle in equal displacement quantity by a drive means 5. The inertial forces F1, F2 of the metal rollers 1, 2 due to this reciprocating movement are represented by F1=M1.omega<2>.Y1, and F2=M2.omega<2>.Y2 when the masses of the large and small diameter metal rollers 1, 2 are set to M1, M2, the displacement quantities from the center of reciprocating movement are set to Y1, Y2 and the angular velocity of a rotary cam member 51 is set to omega. F1-F2 are formed because of M1=M2 and Y1=Y2. When these inertial forces F1, F2 act on the frame FR supporting two metal rollers 1, 2, the inertial forces F1, F2 interfere with each other so as to be set off. |
