A post-processing apparatus includes an ejection tray receiving a recording medium that is ejected, an elastic member urging the ejection tray upward in a vertical direction, a moving mechanism causing the ejection tray to move up and down in the vertical direction, and a driving source driving the moving mechanism.

A post-processing apparatus includes an ejection tray receiving a recording medium that is ejected, an elastic member urging the ejection tray upward in a vertical direction, a moving mechanism causing the ejection tray to move up and down in the vertical direction, and a driving source driving the moving mechanism.

A sheet processing apparatus includes a sheet tray on which one or more sheets to be processed are placed, an adhesive applying unit having an end portion that faces the sheet tray and holds an adhesive material and configured to move towards the sheet tray up to a position at which the end portion is in contact with or proximate to a sheet on the sheet tray and apart from the sheet tray, a pressing member configured to move into and out of a moving path of the adhesive applying unit and a control unit. The control unit is configured to cause the pressing member to be in the moving path of the adhesive applying unit when the pressing member is moved towards the sheet tray, such that the pressing member is pressed against a sheet on the sheet tray by the adhesive applying unit.

A bundle of printing media by eco-stapling often has a smaller thickness than a bundle of printing media by needle stapling by the thickness corresponding to an amount of used staples, although they have the same number of printing media, and there is room capable of stacking bundles in many cases in the eco-stapling. According to an embodiment, when a printing medium that has undergone an image forming process is taken in, stapling processing is performed on the printing medium, and then the printing medium is discharged to the tray, the following process is performed. That is, when the process is performed in accordance with instructed stapling processing, and the printing medium that has undergone the process is discharged outside the apparatus, the amount of printing media stacked on the tray is controlled in accordance with instructed stapling processing.

A sheet binding apparatus includes a stack portion on which sheets are stacked; a manual setting portion, different from the stack portion, to which sheets are manually set from an outside of the apparatus; a first binding portion binding sheets stacked on the stack portion and set on the manual setting portion, the first binding portion being movable to a first position where sheets on the stack portion are bound and to a second position, different from the first position where sheets set on the manual setting portion are bound; and a second binding portion binding sheets stacked on the stack portion, the second binding portion being different from the first binding portion. The first position is set, with respect to a moving direction of the first binding portion, between the second position and a third position where the second binding portion binds sheets stacked on the stack portion.

A sheet binding apparatus includes a stack portion on which sheets are stacked; a manual setting portion, different from the stack portion, to which sheets are manually set from an outside of the apparatus; a first binding portion binding sheets stacked on the stack portion and set on the manual setting portion, the first binding portion being movable to a first position where sheets on the stack portion are bound and to a second position, different from the first position where sheets set on the manual setting portion are bound; and a second binding portion binding sheets stacked on the stack portion, the second binding portion being different from the first binding portion. The first position is set, with respect to a moving direction of the first binding portion, between the second position and a third position where the second binding portion binds sheets stacked on the stack portion.

The purpose of the present invention is to provide a post-processing apparatus capable of performing conveying to and storing at a predetermined stack tray without causing sheet jamming even when a sheet having larger size than a standard size is introduced. The present invention comprises a post-processing apparatus as a processing tray on which sheets conveyed in a predetermined conveyance direction are stacked into a bundle shape, an aligning device which aligns the sheets conveyed to the processing tray, a binding device which performs a binding process on the sheets aligned by the aligning device, and a controller which controls the aligning device so that a sheet is aligned at a position being apart from the binding device by a predetermined distance when the sheet conveyed to the processing tray has a predetermined size or larger.

The purpose of the present invention is to provide a post-processing apparatus capable of performing conveying to and storing at a predetermined stack tray without causing sheet jamming even when a sheet having larger size than a standard size is introduced. The present invention comprises a post-processing apparatus as a processing tray on which sheets conveyed in a predetermined conveyance direction are stacked into a bundle shape, an aligning device which aligns the sheets conveyed to the processing tray, a binding device which performs a binding process on the sheets aligned by the aligning device, and a controller which controls the aligning device so that a sheet is aligned at a position being apart from the binding device by a predetermined distance when the sheet conveyed to the processing tray has a predetermined size or larger.

There is provided a binding processing device including: a first pressing member including a convex portion formed by a curved surface with a curvature and protruding toward a sheet bundle; and a second pressing member including a concave portion formed by a curved surface with a curvature and configured to be combined with the convex portion through the sheet bundle, the second pressing member configured to press the sheet bundle sandwiched between the first and second pressing members, wherein in a state where the convex portion of the first pressing member and the concave portion of the second pressing member are combined with each other, a gap is formed between the convex portion and the concave portion in a cross section of the first and second pressing members along a pressing direction, and the gap has a volume larger than a volume of the sandwiched sheet bundle.

There is provided a binding processing device including: a first pressing member including a convex portion formed by a curved surface with a curvature and protruding toward a sheet bundle; and a second pressing member including a concave portion formed by a curved surface with a curvature and configured to be combined with the convex portion through the sheet bundle, the second pressing member configured to press the sheet bundle sandwiched between the first and second pressing members, wherein in a state where the convex portion of the first pressing member and the concave portion of the second pressing member are combined with each other, a gap is formed between the convex portion and the concave portion in a cross section of the first and second pressing members along a pressing direction, and the gap has a volume larger than a volume of the sandwiched sheet bundle.