| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet post-processing apparatus having a structure which is miniaturized by reducing the distance from a sheet ejection unit of an image forming device from a processing mechanism, and capable of enhancing the alignment property of the sheets in the transverse direction in a processing tray. SOLUTION: The sheet post-processing apparatus comprises a standby tray for making sheets to be ejected from an image forming device stand by, a processing tray which is arranged below the standby tray to stack the sheets dropped from the standby tray or ejected from the image forming device without passing through the standby tray, an alignment mechanism which performs the transverse alignment of the sheets stacked in the processing tray to form a sheet bundle, a post-processing mechanism to post-process the sheet bundle aligned by the alignment mechanism, and an ejection tray to eject the sheet bundle post-processed by the post-processing mechanism. The alignment mechanism has a pair of transverse alignment plates, and has a structure constituted of at least an elastic body on the inner sides of the transverse alignment plates. COPYRIGHT: (C)2006,JPO&NCIPI
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