SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS

摘要

Provided is a sheet conveying apparatus including: a pair of rollers which includes an upper roller and a lower roller and conveys a sheet in a nipping manner; a driving unit which independently drives the upper roller and the lower roller; a conveying unit which is disposed at the upstream of the pair of rollers in the sheet conveying direction and conveys the sheet to the pair of rollers; an overlapping unit which is provided between the pair of rollers and the conveying unit and overlaps a subsequent sheet on a precedent sheet in the conveying direction; and a control unit which controls the driving unit, wherein the control unit controls the driving unit so that: the upper roller and the lower roller are driven before a leading end of the precedent sheet conveyed by the conveying unit reaches the pair of rollers and the driving of the upper roller and the lower roller is stopped before a tail end of the precedent sheet passes the pair of rollers; the pair of rollers is driven again before a leading end of the subsequent sheet conveyed by the conveying unit and overlapped on the precedent sheet nipped by the pair of rollers reaches the pair of rollers and only the upper roller is driven so as to convey the subsequent sheet to the downstream in the conveying direction after the leading end of the subsequent sheet conveyed by the conveying unit reaches the pair of rollers; and the upper roller and the lower roller are driven so as to convey the precedent sheet and the subsequent sheet overlapped on the precedent sheet to the downstream in the conveying direction.

主权项

1. A sheet conveying apparatus comprising:
a pair of rollers which includes an upper roller and a lower roller and conveys a sheet in a nipping manner; a driving unit which independently drives the upper roller and the lower roller; a conveying unit which is disposed at the upstream of the pair of rollers in the sheet conveying direction and conveys the sheet to the pair of rollers; an overlapping unit which is provided between the pair of rollers and the conveying unit and overlaps a subsequent sheet on a precedent sheet in the conveying direction; and a control unit which controls the driving unit, wherein the control unit controls the driving unit so that: the upper roller and the lower roller are driven before the leading end of the precedent sheet conveyed by the conveying unit reaches the pair of rollers and the driving of the upper roller and the lower roller is stopped before the tail end of the precedent sheet passes the pair of rollers; the pair of rollers is driven again before the leading end of the subsequent sheet conveyed by the conveying unit and overlapped on the precedent sheet nipped by the pair of rollers reaches the pair of rollers and only the upper roller is driven so as to convey the subsequent sheet to the downstream in the conveying direction after the leading end of the subsequent sheet conveyed by the conveying unit reaches the pair of rollers; and the upper roller and the lower roller are driven so as to convey the precedent sheet and the subsequent sheet overlapped on the precedent sheet to the downstream in the conveying direction.