Sheet feeding apparatus and image forming apparatus

摘要

A sheet feeding apparatus and an image forming apparatus which can reliably feed even sheets having a non-uniform thickness to prevent excessive stacking.;An auxiliary tray 1 is swingably provided on the upper surface of a tray 2 which is provided in a cassette body 3a to be lifted and lowered and stacks sheets thereon. When the sheets are stacked, a swing regulating portion 12 regulates the swing of the auxiliary tray 1 when the tray 2 is in a sheet stacking position and releases the regulation of the swing of the auxiliary tray 1 when the tray 2 is lifted.

主权项

1. A sheet feeding apparatus comprising:
a sheet accommodating portion which has a sheet accommodating portion body which accommodates sheets therein and a sheet stacking portion which is provided in the sheet accommodating portion body to be lifted and lowered and on which the sheets are stacked; a sheet feeding portion which is provided above the sheet accommodating portion and feeds the sheets stacked on the sheet stacking portion; a lifting and lowering portion which lifts the sheet stacking portion to press the sheets stacked on the sheet stacking portion onto the sheet feeding portion and lowered the sheet stacking portion to a lowered portion at which the sheets are set; a swingable stacking portion which is swingably provided on the upper surface of the sheet stacking portion and on which the sheets are stacked, and the swingable stacking portion is swung by contacting the sheets stacked on the swingable stacking portion with the sheet feeding portion while lifting of the sheet stacking portion; and a swing regulating portion which regulates the swing of the swingable stacking portion when the sheet stacking portion is at the lowered position and releases the regulation of the swing of the swingable stacking portion when the sheet stacking portion is lifted from the lowered position.