Sheet feed device and image forming apparatus including the same

A sheet feed device comprising:

• a stacking tray on which sheets are stacked in such a manner as to be capable of being lifted and lowered;
• and
• a plurality of position restricting members configured to restrict a position of the sheets, and
• a casing side member on a lower portion of an opening/closing member, wherein the plurality of position restricting members comprise:
• a first position restricting member provided to the opening/closing member capable of being opened and closed with respect to a main body of the sheet feed device so as to make it possible to restrict the position of the sheets by being in contact with a trailing edge portion of the sheets, the trailing edge portion being perpendicular to an upper surface of an uppermost one of the stacked sheets;
• and
• a second position restricting member provided to the main body of the sheet feed device so as to make it possible to restrict the position of the sheets by being in contact with the trailing edge portion of the sheets,
• wherein when the opening/closing member is closed, the first position restricting member and the second position restricting member restrict the position of the trailing edge portion of the sheets in an opening/closing direction of the opening/closing member,
• wherein the second position restricting member is provided to the casing side member,
• wherein the first position restricting member includes:
• a first restricting portion configured to restrict a sheet of a first size;
• and a second restricting portion configured to restrict a sheet of a second size,
• wherein the first position restricting member is detachably attached to the opening/closing member and has a substantially rectangular parallelepiped shape, and
• wherein the first restricting portion and the second restricting portion are substantially orthogonal to each other.