| 摘要 |
PROBLEM TO BE SOLVED: To prevent photoreceptor drums, etc., from being unnecessarily worn, and to obtain stable transfer property, in a tandem type image forming device. SOLUTION: In this device, transfer electrifiers 52C to 52K, are respectively provided on a side board 53b of a main frame 53 constituting a transfer unit 50, right below the corresponding photoreceptor drums 48C to 48K while having specific clearances respectively. To change from the state of color mode shown in the figure to that of the monoclomatic mode, a cam shaft 72 is turned by 180 deg. and the minimum radius section of the swinging cam 75 is faced downward. A companying this, a swinging lever 55 is turned clockwise, the swinging roller 90 attached to the swinging lever 55 is shifted downward from a position pushing a transporting belt 51 upward until then, and the transporting belt 51 extended from a driving roller 67 to an auxiliary roller 58 is separated from the photoreceptor drums 48C to 48Y. |
