Apparatus for processing sheets and apparatus for forming image

A sheet processing apparatus, comprising:

• a transport path for transporting a sheet in a predetermined transport direction;
• a folding unit disposed along the transport path to perform folding processing on a sheet transported through the transport path;
• and
• a downstream-side unit disposed on a downstream side in the transport direction of the folding unit along the transport path, and including a collection tray to collect a sheet transported from the folding unit,
• wherein the folding unit includes:
• a space section disposed at a lower side of the transport path for forming a cylindrical shape on a sheet transported;
• a transport roller disposed in the transport path to transport a sheet to the space section;
• and
• folding rollers to form a fold at a predetermined position on a sheet in which the cylindrical shape is formed at the space section, and
• wherein the collection tray of the downstream-side unit is provided such that the collection tray ascends and descends in an up-and-down direction and that the space section is provided in a range of overlapping an ascending and descending range of the collection tray.

A sheet processing apparatus, comprising:

• a transport path for transporting a sheet in a predetermined transport direction;
• a folding unit disposed along the transport path to perform folding processing on a sheet transported through the transport path;
• and
• an upstream-side unit disposed on an upstream side in the transport direction of the folding unit along the transport path to perform processing on a sheet transported to the folding unit,
• wherein the folding unit includes:
• a space section disposed at a lower side of the transport path for forming a cylindrical shape on a sheet transported;
• a transport roller disposed in the transport path to transport a sheet to the space section;
• and
• folding rollers to form a fold at a predetermined position on a sheet in which the cylindrical shape is formed at the space section,
• wherein the space section of the folding unit is provided in a range of overlapping the upstream-side unit in a height direction orthogonal to the transport direction.