A sheet processing device includes: an adhesive-binding unit that applies an adhesive onto sheets stored in a stacker section one by one and adhesive-binds the sheets; a staple-binding unit that staple-binds sheets accumulated in the stacker section by means of staples; and a folding mechanism section having a folding roller that folds the adhesive-bound or staple-bound sheet bundle in two at a binding position of the adhesive-binding unit or staple-binding unit and a folding blade that pushes the bound sheet bundle into the folding roller. A folding speed of the folding mechanism section for the sheet bundle bound by the adhesive-binding unit is lower than a folding speed for the sheet bundle bound by the staple-binding unit; thereby, productivity of the folding processing is improved and occurrence of the peeling-off or break during the folding processing is reduced.

A sheet processing device includes: an adhesive-binding unit that applies an adhesive onto sheets stored in a stacker section one by one and adhesive-binds the sheets; a staple-binding unit that staple-binds sheets accumulated in the stacker section by means of staples; and a folding mechanism section having a folding roller that folds the adhesive-bound or staple-bound sheet bundle in two at a binding position of the adhesive-binding unit or staple-binding unit and a folding blade that pushes the bound sheet bundle into the folding roller. A folding speed of the folding mechanism section for the sheet bundle bound by the adhesive-binding unit is lower than a folding speed for the sheet bundle bound by the staple-binding unit; thereby, productivity of the folding processing is improved and occurrence of the peeling-off or break during the folding processing is reduced.

A sheet processing apparatus capable of discharging even a lateral displacement uncorrectable sheet onto a discharge tray without collision with an alignment plate. A finisher conveys a sheet along a conveying path. A shift unit corrects a lateral displacement of the sheet based on a result of detection by a lateral displacement detection sensor. Sheets discharged via the conveying path are stacked on a discharge tray. A pair of alignment plates disposed above the stacking tray are lowered and are moved between a standby position and an alignment position to be brought into abutment with respective opposite edges of the discharged sheet in the alignment position. A finisher controller makes a distance between the alignment plates in a standby position different according to a sheet type, even when a size of the sheet in the width direction is the same.

A sheet processing apparatus capable of discharging even a lateral displacement uncorrectable sheet onto a discharge tray without collision with an alignment plate. A finisher conveys a sheet along a conveying path. A shift unit corrects a lateral displacement of the sheet based on a result of detection by a lateral displacement detection sensor. Sheets discharged via the conveying path are stacked on a discharge tray. A pair of alignment plates disposed above the stacking tray are lowered and are moved between a standby position and an alignment position to be brought into abutment with respective opposite edges of the discharged sheet in the alignment position. A finisher controller makes a distance between the alignment plates in a standby position different according to a sheet type, even when a size of the sheet in the width direction is the same.

A medium-discharging device includes: a device main body including a medium-discharging section that discharges a medium; a medium-receiving tray that receives the medium discharged by the medium-discharging section; and a pressing member that is configured to be attached to and detached from to the device main body and presses the medium discharged by the medium-discharging section against the medium-receiving tray in a state in which the pressing member is attached to the device main body, in which the pressing member is configured to switch, in the state in which the pressing member is attached to the device main body, between a first state in which the pressing member comes into contact with the medium-receiving tray and a second state in which the pressing member retreats upward so as to be apart from the medium-receiving tray.

A medium-discharging device includes: a device main body including a medium-discharging section that discharges a medium; a medium-receiving tray that receives the medium discharged by the medium-discharging section; and a pressing member that is configured to be attached to and detached from to the device main body and presses the medium discharged by the medium-discharging section against the medium-receiving tray in a state in which the pressing member is attached to the device main body, in which the pressing member is configured to switch, in the state in which the pressing member is attached to the device main body, between a first state in which the pressing member comes into contact with the medium-receiving tray and a second state in which the pressing member retreats upward so as to be apart from the medium-receiving tray.

A printer includes a printing unit, a casing, a scanner unit disposed in an upper portion of the casing, and a discharge unit that, below the scanner unit, is connected to the casing pivotably between a closed position and an open position and that a sheet of paper is discharged to. The discharge unit includes a placement surface for the sheet and a medium support unit capable of supporting the sheet from below while in a state of being protruded from the placement surface. The medium support unit is displaceable between a maximum protruded position and a minimum protruded position. When the amount of protrusion of the medium support unit from the placement surface when the discharge unit is in the open position is less than the amount of protrusion of the medium support unit in the maximum protruded position from the placement surface.

A printer includes a printing unit, a casing, a scanner unit disposed in an upper portion of the casing, and a discharge unit that, below the scanner unit, is connected to the casing pivotably between a closed position and an open position and that a sheet of paper is discharged to. The discharge unit includes a placement surface for the sheet and a medium support unit capable of supporting the sheet from below while in a state of being protruded from the placement surface. The medium support unit is displaceable between a maximum protruded position and a minimum protruded position. When the amount of protrusion of the medium support unit from the placement surface when the discharge unit is in the open position is less than the amount of protrusion of the medium support unit in the maximum protruded position from the placement surface.

A sheet alignment device includes a driven roller, a drive roller, a displacement driving device, an information acquisition portion, and a displacement control portion. The drive roller is configured to rotate in a first rotation direction and in contact with an upper surface of each of sheets conveyed onto a tilt tray, to feed the sheets toward a base end portion of the tilt tray. The drive roller is configured to rotate in a second rotation direction and in contact with an uppermost surface of the sheets, to discharge the sheets from the tilt tray. The displacement control portion is configured to, when the drive roller rotates in the first rotation direction, control a holding position of the drive roller in accordance with the number of the sheets on the tilt tray and thickness information of each of the sheets acquired by the information acquisition portion.

A sheet alignment device includes a driven roller, a drive roller, a displacement driving device, an information acquisition portion, and a displacement control portion. The drive roller is configured to rotate in a first rotation direction and in contact with an upper surface of each of sheets conveyed onto a tilt tray, to feed the sheets toward a base end portion of the tilt tray. The drive roller is configured to rotate in a second rotation direction and in contact with an uppermost surface of the sheets, to discharge the sheets from the tilt tray. The displacement control portion is configured to, when the drive roller rotates in the first rotation direction, control a holding position of the drive roller in accordance with the number of the sheets on the tilt tray and thickness information of each of the sheets acquired by the information acquisition portion.