Patent ID: 9592973
Date: 2017-03-14
CPC Classifications: B65H

Claim:
1. A sheet feeding apparatus comprising: a stacking portion on which sheets are stacked, the stacking portion being movable up and down; a lifting portion which lifts the stacking portion; a feeding portion which abuts against a topmost sheet of the sheets stacked on the stacking portion, and feeds the topmost sheet; a first height detecting portion which outputs a signal corresponding to a position in a height direction of the topmost sheet of the sheets stacked on the stacking portion; a sheet presence detecting portion which is disposed contactably with the topmost sheet of the sheets stacked on the stacking portion and outputs a signal corresponding to presence or absence of sheets stacked on the stacking portion; a second height detecting portion which outputs a signal corresponding to a position in a height direction of the stacking portion independent of the position of the topmost sheet in the height direction; and a control portion controlling the lifting portion to perform a lifting operation such that the position of the topmost sheet is kept within a predetermined range by lifting the stacking portion based on the signal from the first height detecting portion, wherein the control portion performs a predetermined control based on the signal from the sheet presence detection portion in a state in which the position of the stacking portion is detected to be above a predetermined height based on the signal from the second height detecting portion, and does not perform the predetermined control in a case in which the position of the stacking portion is detected to be below the predetermined height, in a state in which the stacking portion is positioned at a position such that the topmost sheet is positioned within the predetermined range.