Sheet feeding apparatus and image forming apparatus

摘要

A sheet feeding apparatus (10) includes a sheet stacking portion (11) for stacking thereon a sheet, a sheet feeding portion (12) for axially supporting a sheet feeding roller (21), and a spring portion (26) actable on the sheet feeding portion. The spring portion acts on the sheet feeding portion so that the sheet feeding roller is pressed against the sheet with a pressing force when a sheet stacking amount is large and so that the pressing force is decreased by canceling moment created by a weight of the sheet feeding portion when the sheet stacking amount is small.