Sheet Aligning Device and Image Forming Apparatus Including the Same

摘要

A disclosed sheet aligning device (1) includes a sheet conveyance path (7,8); a detecting unit (5) configured to detect a side edge of a sheet (9) being conveyed in the sheet conveyance path; a stopper (3) provided on an upstream side of the detecting unit (5) and configured to open/close in such a manner as to allow/prevent passage of the sheet (9) through the sheet conveyance path and to position a leading edge of the sheet (9) being conveyed in the sheet conveyance path; a first conveying unit (2) provided on an upstream side of the stopper (3), the first conveying unit (2) including a pair of first rollers configured to come in contact with/separate from each other; a second conveying unit (4) provided on an upstream side of the first conveying unit (2), the second conveying unit (4) including a pair of second rollers configured to come in contact with/separate from each other; and a horizontal movement unit (12-14) configured to move the pair of first rollers in an axial direction of the first rollers based on a detection result output by the detecting unit (5).