| 摘要 |
PROBLEM TO BE SOLVED: To provide an image formation device clarifying exchange time of parts to be exchanged due to the deterioration with age. SOLUTION: A roller 10 of an image formation device is provided with a rubber member 12 around a core metal 11, and a wear making layer 12a is formed like a cylinder using a color different from a color in the other part of the rubber member 12, particularly, on a surface side and the same member at a position indicating a limit of wear of the rubber member 12 so that whether the rubber member 12 is worn up to a specified amount or not can be observed at a glance. The roller 10 is sequentially worn from the surface side of the rubber member 12 due to its use, and when the wear of the rubber member 12 reaches the limit, a wear marking layer 12a having different color appears on its surface so that it is possible to learn exchange time of the roller 10 merely by looking the roller 10 at a glance depending on whether the wear marking layer 12a appears on the surface of the roller 10. |
