| 摘要 |
PROBLEM TO BE SOLVED: To hold the friction coefficient of a feeding rotor at a prescribed value or more at all times and feed the sheets stably by providing a restoration means for restoring the lowering of the feeding force of the feeding rotor which applies the feeding force to the sheets. SOLUTION: A sheet feeder B is provided with a restoration means 9 for restoring the lowering of line feeding force of a pickup roller 7 or a feeding rotor which applies the feeding force to sheets S. The restoration means 9 is provided with a cleaning means for the case where silica and paper powder are stuck thereto and a polishing means for the case where the surface is deteriorated or hardened. For example, a cleaning pad 9a and a polishing pad 9b are attached to a holder 10. A pinion gear 11 is rotated, the holder 10 is slid to the left/right, and the pickup roller 7 is pushed against the polishing pad 9b and the cleaning pad 9a so as to be rotated. This constitution can polish and clean the surface of the pickup roller 7. The feeding force is thus restored so as to provide a stable sheet feeding at all times. |
