Sheet conveying device and image forming apparatus having same

摘要

A sheet conveying device includes upstream side rollers; discharge rollers located downstream from the upstream side rollers in the feeding direction of sheets, to discharge sheets to a discharge tray; a reflective optical detector located between the discharging rollers and the upstream side rollers, to emit light and to receive light reflected off of the sheets; and a recognizing unit to detect, based on output of the detector, whether or not a sheet is present at a detection region of the detector. When a sheet is fed over a conveying path inclined with respect to a detection face of the detector, the discharge rollers feed the sheet in a bent state between the upstream side rollers and the discharge rollers, so that the sheet is close to the detector or the sheet is close to being perpendicular to an optical axis of the detector.

主权项

1. A sheet conveying device, comprising:
upstream side rollers configured to feed sheets; discharge rollers located downstream from the upstream side rollers in a feeding direction of the sheets, configured to discharge sheets to a discharge tray; a processing tray having a sheet loading face, the processing tray being located between the upstream side rollers and the discharge rollers, and upon the sheet loading face sheets are loaded before being discharged to the discharge tray; a reflective optical detector located on the sheet loading face of the processing tray between the discharge rollers and the upstream side rollers, configured to emit light, to receive light reflected off of the sheets, and to detect both sheets whose surfaces are not parallel to a detection face thereof, fed from the upstream side rollers towards the discharge rollers, and sheets whose surfaces are parallel to the detection face thereof, placed on the sheet loading face; a recognizing unit configured to detect, based on an output of the detector, whether or not a sheet is present at a detection region of the detector; and when a sheet is fed over a conveying path inclined with respect to a detection face of the detector, the upstream side rollers feed the sheet while bending the sheet with the discharge rollers toward the detector between the upstream side rollers and the discharge rollers, so that the presence of the sheet at a detection region of the detector is detected by the recognizing unit, based on the output of the detector.