Sheet feeding apparatus and image forming apparatus

Abstract

A sheet feeding apparatus and an image forming apparatus are provided with a fixed member and a movable member, which regulate positions in a width direction of the sheet that is stacked on the dedicated cassette detachably attached to an intermediate plate, are provided while facing each other. The fixed member and the movable member moved to a position that regulates the sheet are regulated by side regulating members. The side regulating members that are movable in the width direction regulate the positions in the width direction of the sheet stacked on the intermediate plate.

1 . A sheet feeding apparatus comprising:
 a sheet stacking portion on which sheets are stacked;   a pair of first regulating portions that is provided while being movable in a width direction of the sheet to regulate a position in the width direction of the sheets stacked on the sheet stacking portion;   a sheet stacking unit that is attached to the sheet stacking portion;   a pair of second regulating portions that is provided on the sheet stacking unit to regulate the position in the width direction of the sheet stacked on the sheet stacking unit, and   at least one of the second regulating portions is movable in the width direction,   wherein at least one of the sheet stacking portion or the sheet attacking unit is movable in the width direction, and   the pair of second regulating portions are regulated by the pair of first regulating portions, respectively.   
     
     
         2 . The sheet feeding apparatus according to  claim 1 , further comprising positioning portions, provided in the pair of second regulating portions while the sheet stacking unit is attached to the sheet stacking portion, abutting the pair of first regulating portions respectively, and
 wherein the positioning portions are equal to each other in a distance from a sheet regulating surface of the second regulating portion to a sheet regulating surface of the first regulating portion.   
     
     
         3 . The sheet feeding apparatus according to  claim 1 , wherein a small-size sheet whose position in the width direction cannot be regulated by the first regulating portion is stacked on the sheet stacking unit. 
     
     
         4 . An image forming apparatus comprising:
 an image forming portion that forms an image in a sheet; and   a sheet feeding apparatus that feeds the sheet to the image forming portion,   wherein the sheet feeding apparatus includes:   a sheet stacking portion on which the sheets are stacked;   a pair of first regulating portions that is provided while being movable in a width direction of the sheet to regulate a position in the width direction of the sheet stacked on the sheet stacking portion;   a sheet stacking unit that is attached to the sheet stacking portions;   a pair of second regulating portions that is provided on the sheet stacking unit to regulate the position in the width direction of the sheet stacked on the sheet stacking unit, and   at least one of the second regulating portions is movable in the width direction,   wherein at least one of the sheet stacking portion or the sheet stacking unit is movable in the width direction, and   the second regulating portions are regulated by the pair of first regulating portions, respectively.   
     
     
         5 . The image forming apparatus according to  claim 4 , further comprising positioning portions, provided in the pair of second regulating portions while the sheet stacking unit is attached to the sheet stacking portion, abutting the pair of first regulating portions, respectively, and
 the positioning portions are equal to each other in a distance from a sheet regulating surface of the second regulating portion to sheet regulating surface of the first regulating portion.   
     
     
         6 . The image forming apparatus according to  claim 4 , wherein a small-size sheet whose position in the width direction cannot be regulated by the first regulating portion is stacked on the sheet stacking unit.