| 摘要 |
To provide a sheet supply device including a long life sheet supply roller. A large radius portion 10a of a sheet supply roller 10 is gradually abraded in association with passage of operation time. Protrusions 12a of an idle roller 12 initially contact a rotational shaft 14 without forming any play between the protrusions 12a and the rotational shaft 14. However, friction force generated between the tips of the protrusions 12 and the rotational shaft 14 wears down the protrusions 12a. As a result, a difference between the radius of the large radius portion 10a and the radius of the idle roller 12 will be hardly decreased even after a cumulative operation time. Therefore, even after the abrasion progresses, sheet supply operations will be operated properly.
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