| 摘要 |
PROBLEM TO BE SOLVED: To suppress generation of slip of webs regardless of a tension difference of webs before and after a portion nipped by a driving roller and a driven roller.SOLUTION: An image conveyance device comprises: a driving roller; N pieces (N is 1 or larger integer) of driven rollers which nip a winding part of a web between the rollers and the driving roller; and a tension imparting part which gives tension Tl to a web on one side of the winding part and gives tension Th higher than tension Tl to a web on the other side being the opposite from one side of the winding part, in which an angle θ0, an angle θ(n), a load P(n), a static friction coefficient μ0, and a static friction coefficient μ(n) satisfy a predetermined relational expression (Expression 1).SELECTED DRAWING: Figure 8 |
