Sheet conveying device, image forming apparatus incorporating the sheet conveying device, and post processing device incorporating the sheet conveying device

A sheet conveying device comprising:

• multiple position detectors aligned along a sheet conveying direction and configured to detect a side end of a sheet;
• and
• a position corrector, including at least one controller, configured to control at least one motor to convey the sheet and to control the at least one motor to correct a position of the sheet based on a positional deviation amount of the sheet, obtained by receipt of a detection result of the multiple position detectors, a position of a subsequent sheet being corrected based on a sum of the positional deviation amount of the sheet and a positional deviation amount of the subsequent sheet,
• wherein the multiple position detectors include:
• a first position detector disposed upstream from the position corrector in the sheet conveying device;
• a second position detector disposed downstream from the first position detector and downstream from the position corrector in the sheet conveying device;
• a third position detector disposed downstream from the position corrector in the sheet conveying direction;
• and
• a fourth position detector disposed downstream from the third position detector in the sheet conveying direction,
• wherein the first position detector and the second position detector are configured to perform a first detection to detect the position of the sheet,
• wherein the position corrector is configured to control the at least one motor to perform a primary correction by which the position of the sheet is corrected based on a positional deviation amount obtained by the first detection,
• wherein the second position detector and the third position detector are configured to perform a second detection to detect the position of the sheet,
• wherein the position corrector is configured to control the at least one motor to perform a secondary correction by which the position of the sheet is corrected based on a positional deviation amount obtained by the second detection, and
• the at least one controller being configured to control the at least one motor to perform either one of the primary correction and the secondary correction to correct the position of the sheet based upon a sum of a positional deviation amount of the sheet obtained by a detection result of the third positional detector and the fourth positional detector and a positional deviation amount of a subsequent sheet conveyed after the sheet, obtained by either one of the first detection and the second detection.