SHEET DISCHARGE CONTROL METHOD, SHEET DISCHARGE DEVICE, AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To surely prevent a sheet jam and sheet folding in an image forming device or a sheet post-processing device by improving the alignment and discharge characteristics of the sheets. SOLUTION: Whether the sheet S is drawn out or not from a stacker tray 15 is determined (step S51). Then, chattering is absorbed (steps S52-S55). When time is up in the step S55 (yes), it is determined whether the sheet (paper) is under discharging or not (step S56). When the sheet is under discharging (yes), the raising speed of the stacker tray 15 is set to a high speed (step S57). It is recognized that the stacker tray 15 is raised to a home position (step S59). The raising control of the stacker tray 15 is stopped (step S60).