| 摘要 |
PURPOSE:To simultaneously move many nozzles in the equal amount in a simple structure by deciding the movement in the radial direction of the nozzles by the rotary amount of a rotary cam having a spiral slot. CONSTITUTION:Since a nozzle 4 is inserted movably to a spiral slot 8 formed on the surface of a rotary cam 7 by the rotation of a motor 10 through a nozzle holder 6 and a cam follower 9, the cam 7 is moved radially in the prescribed amount under the guidance of a guide when the cam 7 is rotated at the desired pitch by the rotation of the motor 10. Since the radial movement of the nozzle 4 is all performed by the rotation of the slot 8, the nozzle 4 is all moved in the equal amount. Thus, no irregularity occurs in the movements among the nozzles. |
