Patent ID: 9387999
Filing Date: 2016-07-12
CPC Classification: B65H

Claim Text:
1. A sheet feeding device comprising: a stacking member on which a sheet is placed; a lifting unit configured to lift the stacking member; a pickup member that is movable between a pickup position where the pickup member picks up the sheet placed on the stacking member and a retreat position where the pickup member does not contact with the sheet placed on the stacking member, wherein the pickup member, being in the pickup position, contacts with the sheet; a pickup-member-moving unit configured to move the pickup member between the pickup position and the retreat position; a first detecting unit configured to detect the pickup member being in the pickup position, wherein an upper surface of the sheet with which the pickup member, being in the pickup position, contacts is in a first position; a second detecting unit configured to detect the upper surface of the sheet in a second position which is lower than the first position in a vertical direction; and a control unit configured to control the lifting unit based on a detection result of the first detecting unit and the second detecting unit, wherein the control unit controls the lifting unit to lift the stacking member, and then the pickup-member-moving unit moves the pickup member from the retreat position to the pickup position after the second detecting unit detects the upper surface of the sheet, wherein, in a case where the first detecting unit does not detect the pickup member and the second detecting unit detects the upper surface of the sheet, the control unit controls the lifting unit to lift the stacking member by a first predetermined amount, and wherein, in a case where the first detecting unit does not detect the pickup member and the second detecting unit does not detect the upper surface of the sheet, the control unit controls the lifting unit to lift the stacking member by a second predetermined amount that is greater than the first predetermined amount.