| 摘要 |
A sheet post-processing device includes a storing tray for storing a sheet, and a process tray for post-processing the sheet. The sheet post-processing device has a first mode for guiding the sheet from an image forming device to the storing tray, and a second mode for guiding the sheet from the image forming device to the process tray and guiding the sheet to the storing tray after predetermined post-processing is operated. A guide device is formed in the sheet post-processing device for guiding the sheet from the image forming device to allow the sheet to pass at a portion spaced from the sheet placing surface of the process tray and to reach the storing tray. The guide means is transferred to a position for guiding the sheet to the storing tray in case of the first mode, and is transferred to a position to allow the sheet to be placed on the sheet placing surface of the process tray in case of the second mode.
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