Sheet conveying device for conveying sheets such as documents, recording paper, and the like

A sheet conveying device comprising a paper-supply roller for feeding sheets one by one from a paper-supply unit to a paper-conveyance path, and a conveying-roller for conveying the sheets fed to the paper-conveyance path by the paper-supply roller;

• and further comprising:
• a sheet-detecting unit for detecting a leading edge position of a sheet;
• an overlapped-feeding-detecting unit for detecting overlapped feeding of the sheets;
• an overlapped-feeding-distance-calculating unit that, based on the detection results of the sheet-detecting unit and the overlapped-feeding-detecting unit, calculates an overlapped-feeding distance in which the sheets are overlapped;
• and
• a conveyance-control unit that causes the paper-supply roller to stop at a timing when a part of the sheet reaches the paper-supply roller;
• wherein,
• the paper-supply roller feeds the sheets in a sheet-conveyance direction from the paper-supply unit to the paper-conveyance path;
• the part of the sheet is defined as a position on the sheet that is separated a set length, in the sheet-conveyance direction, from a trailing edge of the sheet;
• and
• the conveyance-control unit, in a case where detection of overlapped feeding by the overlapped-feeding-detecting unit occurs a plurality of times, extends the set length based on the overlapped-feeding distance.