Abstract:
A post-processing device includes a device main body, a processing tray, a placed sheet processing part, a stack tray, a detecting part, a stack tray driving part and a sheet conveying part. The processing part carries out post-process to the sheet placed on the processing tray. The stack tray stacks the sheet ejected from a sheet ejection port. The detecting part detects whether or not the stack tray or the sheet on the stack tray is positioned at a detected position below the sheet ejection port. When the sheet is ejected without the post-process, in a detectable case, the conveying part ejects the sheet without placing on the processing tray and, in an undetectable case, the conveying part places the sheet on the processing tray without ejecting to the stack tray until it becomes detectable, and then, ejects the sheet on the processing tray after it becomes detectable.
Abstract:
A sheet processing device includes an exit tray and a sheet alignment mechanism. On the exit tray, ejected sheets or ejected sheet sheaves subjected to stapling are stacked. When at least a sheet is ejected, the sheet alignment mechanism aligns the sheets in a manner to be in contact with and catch opposite ends of the sheets stacked on the exit tray from a base end side of the exit tray. When a sheet sheaf is ejected, the sheet alignment mechanism comes in contact with a plurality of points on a topmost surface of the sheet sheaves stacked on the exit tray to detect a height difference between the plurality of points.
Abstract:
A staple processing device includes a staple tray, a staple unit, a rear reference plate, a front reference plate, and an interlocking mechanism. The staple unit performs a staple process on a plurality of sheets loaded on the staple tray. The staple unit is movable along the ends of the sheets in a sheet width direction. The rear reference plate and the front reference plate abut the ends of the plurality of sheets and aligns the plurality of sheets. The interlocking mechanism moves the rear reference plate and the front reference plate in the sheet width direction in interlock with the movement of the staple unit.