| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress accurately at low cost color shift caused by eccentricity of a gear that performs both of drive transmission to an image arrow and drive transmission to an image carrier disposed in the downstream side of the drive transmission path in a construction that driving force is transmitted from a single driving source sequentially to a plurality of image carriers. <P>SOLUTION: Drive gears 32 respectively having about the same eccentricity amount are used and configured so that each clip angle θi thereof is "π-ϕ±e". N pieces of drive gears are imposed in such a manner that the rotation position of the maximum eccentricity point 4 of an nth drive gear is shifted to the rotation direction of the nth drive gear with respect to the rotation position of the maximum eccentricity point 4k of a first driving gear 32k, by "(n-1)ϕ" when the n is odd, and by "θi+(n-1)ϕ" when the n is even. ϕ is 2 π(Ls-u×Ld)/Ld, where "Ls" is a distance between shafts of image carriers, "Ld" is a surface moving distance of an image carrier per rotation of each drive gear, and "u" is the number of rotations of the drive gear while an object to be transferred moves the Ls. <P>COPYRIGHT: (C)2012,JPO&INPIT |
