Invention Grant
US09592973B2 Sheet feeding apparatus and image forming apparatus 有权
送纸装置和成像装置

Sheet feeding apparatus and image forming apparatus
Abstract:
A sheet feeding apparatus includes a stacking portion, a lifting portion, a feeding portion, and a control portion. The sheet feeding apparatus further includes a first height detecting portion configured to output a signal corresponding to a position in a height direction of the topmost sheet of sheets stacked on the stacking portion, a sheet presence detecting portion configured to output a signal corresponding to presence or absence of the sheets stacked on the stacking portion, and a second height detecting portion configured to output a signal corresponding to a position in a height direction of the stacking portion. The control portion performs control for sheet feeding operation using the signal from the sheet presence detecting portion if the position of the stacking portion is above a predetermined height based on the signal from the second height detecting portion and, if the position of the stacking portion is below the predetermined height, the control portion performs control for sheet feeding operation not using the sheet presence detecting portion.
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