Sheet stack ejecting apparatus, image forming apparatus, and sheet stack processing apparatus

摘要

It is intended to provide a sheet stack ejecting apparatus, an image forming apparatus and a sheet stack processing apparatus applicable to ejection of a sheet stack while ejection errors are prevented by reducing disorderliness of ejected sheets of paper. A sheet ejecting apparatus 10 carries and ejects a sheet stack by holding the sheet stack with an ejecting roller pair 10 that consists of a top roller 21 and a bottom roller 22 . The sheet ejecting apparatus 10 further includes a motor 24 for shifting the top roller 21 to switch between pressing state and separated state with respect to the ejecting roller pair 15 and a controller 20 for controlling the motor 24 . The controller 20 works as ejection means that makes the ejecting roller pair 15 pressing state so as to eject a sheet stack and as separation means that makes the ejecting roller pair 15 separated state before a back end of a sheet stack escapes from nips of the ejecting roller pair 15 by using the motor 24.