A sheet feeding cartridge storing a sheet conveyed orthogonally to a width direction includes a main body, a pair of side cursors and a restricting member. The main body has a bottom part including a sheet placement face and allows sheets of different sizes to be placed. The side cursors mutually slide in approaching and separating directions and restrict a position in the width direction. The restricting member comes into contact with a side edge in the width direction at a position separated from one of the side cursors to an upstream side in a conveyance direction and restricts the position in the width direction. The restricting member is attachably/detachably provided in the main body at each of plural positions along the width direction and restricts the side edge of each of the sheets of different sizes in the width direction.

A height regulating portion is integrally formed with a pressing member provided in a first side regulating plate configured to regulate a position of a sheet in a sheet feed cassette, and the pressing member is provided turnably in the first side regulating plate and movably to project and retract positions. Then, when the sheet abuts with the height regulating portion and the height regulating portion is pressed from above by the sheet when the sheet is stored, the pressing member is moved, while turning, to the retract position.

A destacking system for cardboard blanks comprises a deposition unit for cardboard blanks with first and second deposition positions, a first destacker comprising a first stacking magazine for accommodating a first stack of cardboard blanks, a first retaining system for retaining the cardboard blanks at a first stacking position, and a first conveying unit with a first gripper to grip a first cardboard blank of the first destacker at the first stacking position and convey the first cardboard blank to the first deposition position, a second destacker comprising a second stacking magazine for accommodating a second stack of cardboard blanks, a second retaining system for retaining the cardboard blanks at a second stacking position, and a second conveying unit with a second gripper configured to grip a second cardboard blank of the second destacker at the second stacking position and convey the second cardboard blank to the second deposition position.

An image forming apparatus includes a sheet conveyance passage, an image forming apparatus, a sheet discharge unit, an apparatus body, a sheet discharge port, a pair of sheet pressing members, a discharge tray, and an overhang portion. The image forming unit includes an image carrying member. The sheet discharge unit is disposed above the image forming unit. The sheet discharge port is provided in the sheet discharge unit and has an upper edge and a lower edge. The pair of sheet pressing members press the sheet passing through the sheet discharge port. The overhang portion protrudes from the upper edge of the sheet discharge port in the sheet discharge direction beyond the lower edge. The overhang portion is disposed such that the straight line passing through the distal end of the overhang portion and the lower edge of the sheet discharge port passes above the image carrying member.

A sheet regulating portion includes a body portion including a regulating surface facing an edge of a sheet, a pressing member having a pressing portion capable of projecting out of the body portion, an upper portion formed integrally with an upper part of the pressing portion so as to project to a sheet side and regulating an upward move of the sheet, and an urging member to urge the pressing member so that the pressing portion presses the edge of the sheet. In addition, a holding portion holds the pressing portion movably from a projecting position where the pressing portion projects out of the body portion to a retracting position where the upper portion enters within the body portion while inclining the pressing portion with respect to the regulating surface by resisting against the urging member when the upper portion is pressed from above.

A sheet storage apparatus includes a sheet storage portion and a regulating member configured to regulate positions of a sheet that is stored in the sheet storage portion. The regulating member includes a regulating portion configured to abut against the sheet. The regulating member is moved to a first regulating position on which the regulating portion regulates an end portion in a first direction of a first sheet having a first size. In addition, the regulating member is moved to a second regulating position on which the regulating portion regulates an end portion, in a second direction orthogonal to the first direction, of a second sheet having a second size different from the first size.

A sheet regulating portion includes a body portion including a regulating surface facing an edge of a sheet, a pressing member having a pressing portion capable of projecting out of the body portion, an upper portion formed integrally with an upper part of the pressing portion so as to project to a sheet side and regulating an upward move of the sheet, and an urging member to urge the pressing member so that the pressing portion presses the edge of the sheet. In addition, a holding portion holds the pressing portion movably from a projecting position where the pressing portion projects out of the body portion to a retracting position where the upper portion enters within the body portion while inclining the pressing portion with respect to the regulating surface by resisting against the urging member when the upper portion is pressed from above.

A sheet regulating portion includes a body portion including a regulating surface facing an edge of a sheet, a pressing member having a pressing portion capable of projecting out of the body portion, an upper portion formed integrally with an upper part of the pressing portion so as to project to a sheet side and regulating an upward move of the sheet, and an urging member to urge the pressing member so that the pressing portion presses the edge of the sheet. In addition, a holding portion holds the pressing portion movably from a projecting position where the pressing portion projects out of the body portion to a retracting position where the upper portion enters within the body portion while inclining the pressing portion with respect to the regulating surface by resisting against the urging member when the upper portion is pressed from above.

A paper feeding device of an image forming device includes a flotation air blowing unit and a separation air blowing unit. The flotation air blowing unit floats stacked uppermost paper through air blowing. The separation air blowing unit blows an end of other paper floated together with the floated uppermost paper to separate the other paper from the uppermost paper, the end being on the downstream side in the paper feeding direction. The flotation air blowing unit floats an end of the stacked uppermost paper, the end being on the downstream side in the paper feeding direction. The paper feeding device includes a resistance force applying mechanism which applies resistance force that gives a load against movement along the paper feeding direction to an end of stacked upper paper, the end being on the upstream side in the paper feeding direction.

A sheet feeder includes a sheet feeding unit configured to feed a sheet from a sheet storage case in a sheet feeding direction orthogonal to a loading direction in which the sheet storage case is loaded into an apparatus main body, and a conveying guide configured to guide the sheet fed by the sheet feeding unit. The conveying guide includes a first guide segment included in the apparatus main body and a second guide segment included in the sheet storage unit. The sheet feeder further includes an edge guide member disposed at an end of the first guide segment. The edge guide member has a guide surface that allows reaction force including a directional force component acting upward and a directional force component acting in a direction opposite to the sheet feeding direction to be generated when the sheet partly projecting from the sheet storage case abuts the guide surface.