Sheet post-process apparatus

A sheet post-process apparatus comprising:

• a plurality of rollers which receive and convey sheets conveyed from an MFP main body;
• a waiting tray which is provided in the course of a conveying path, and makes standby the sheets conveyed from the rollers in the case where a post-process is required;
• a conveying mechanism which causes the sheets made standby on the waiting tray to be dropped and moved by self-weight;
• a processing tray which receives the sheets dropped and moved from the waiting tray and the sheets conveyed from the conveying path without intervening the waiting tray, before carrying out a post-process;
• a post-process mechanism which carries out a post-process on a bundle of sheets aligned on the processing tray;
• a sheet-conveying mechanism which conveys the post-processed bundle of sheets from the processing tray;
• and
• a storage tray which stacks the bundle of sheets conveyed,
• wherein an upstream side end in a conveying direction of the sheets on the waiting tray and a downstream side end in a conveying direction of the sheets on the processing tray are allocated to overlap on each other in the conveying direction of the sheets.