Patent ID: 8684345

Claim:
A paper-sheet post-processing device comprising: a paper-sheet supporting unit, which is arranged on a conveying route guiding a sheet of paper conveyed from an image forming device, configured to support the sheet of paper fed from the conveying route; a staple unit, which is arranged at a standard position of the paper-sheet supporting unit, configured to execute binding processing of the sheet of paper supported by the paper-sheet supporting unit; and a paper-sheet aligning unit configured to align the sheet of paper supported by the paper-sheet supporting unit with the standard position; wherein the paper-sheet aligning unit comprises: a main unit, which is disposed opposite to the paper-sheet supporting unit, comprising a first support part and a second support part that are arranged straddling the conveying route; a paper-sheet holding part, which is arranged on the main unit, configured to hold the sheet of paper supported by the paper-sheet supporting unit; a cam mechanism, which comprises a cam member rotatably arranged on the main unit, configured to place the paper-sheet holding part close to and at a distance from the paper-sheet supporting unit by rotation of the cam member, an aligning mechanism, which comprises an aligning member rotatably arranged on the main unit, configured to align the sheet of paper supported by the paper-sheet supporting unit with the standard position by rotation of the aligning member; and a paper-sheet stopping comprising a paper-sheet stopping member configured to stop the sheet of paper fed from the conveying route to the paper-sheet supporting unit, wherein the main unit comprises a rotation shaft which is rotatably supported axially by the first support part and the second support part wherein the cam member and the aligning member are arranged to be fixed to the rotation shaft, and wherein the paper-sheet stopping member is arranged swingable on the rotation shaft such that the paper-sheet stopping member is movable to a stop position where the sheet of paper is stopped and a non-stop position where the sheet of paper is not stopped.