| 摘要 |
PURPOSE:To supply or stop air with exact timing all the time by closing the opening and closing position of the valve and the using position of air by a method in which a rotary valve with a circular long groove is fixed to the cylinder side of a printer, a fixing valve is fixed to the frame side of the printer base, and the air using portion in the cylinder is led to an air source at a given position during one-time rotation of the cylinder. CONSTITUTION:A circular long groove 27 opening toward the peripheral side is provided in paired rotary valves 24 shaped into concentrical ring form with a reversal cylinder 9, and an air hole 29 is drilled in the central part of the lengthwise direction of the long groove 27. A suction port and left and right-handed vent ports 29 are led to an air pipe 31. On the other hand, a circular fixing valve 35 having a circumferential angle of nearly 90 deg. and a concentricity with the rotary valve 24 is fixed to the inner surface of left-and right-handed frames 21, a hose-fitting hole 37 is provided on the round locus of the long groove 27, and the reversal cylinder 9 is separately connected to an air supplier and an air sucker with left and right-handed hoses 39. |
