Document conveying device

Abstract

A document conveying device includes a sheet feeding tray, a sheet feeding mechanism, a sheet feeding tray lifting mechanism, a top plate, a fixed wall part, and a lifting wall part. The top plate is in contact with a lower surface of the document to be fed. The fixed wall part is provided extending downward from an upstream side end portion of the top plate, and fixed in position. The lifting wall part is provided extending upward from a downstream side end portion of the sheet feeding tray, and is lifted and lowered along the fixed wall part together with the sheet feeding tray. The lifting wall part has a slit along an upper-and-lower direction. The fixed wall part has a fin along the upper-and-lower direction. An upper end portion of the slit is opened in the upper-and-lower direction. The fin is arranged inside the slit.

1 . A document conveying device comprising:
 a sheet feeding tray on which a document is placed;   a sheet feeding mechanism which feeds the document placed on the sheet feeding tray in a predetermined sheet feeding direction;   a sheet feeding tray lifting mechanism which lifts and lowers the sheet feeding tray;   a top plate which is adjacent to the sheet feeding tray on a downstream side in the sheet feeding direction and is in contact with a lower surface of the document to be fed;   a fixed wall part which is provided extending downward from an upstream side end portion of the top plate in the sheet feeding direction, and fixed in position; and   a lifting wall part which is provided extending upward from a downstream side end portion of the sheet feeding tray in the sheet feeding direction, faces the fixed wall part on an upstream side of the fixed wall part in the sheet feeding direction, and is lifted and lowered along the fixed wall part together with the sheet feeding tray, wherein   the lifting wall part has a slit along an upper-and-lower direction,   the fixed wall part has a fin along the upper-and-lower direction,   an upper end portion of the slit is opened in the upper-and-lower direction, and   the fin protrudes upstream of the sheet conveying direction, and is arranged inside the slit.   
     
     
         2 . The document conveying device according to  claim 1 , wherein
 the slit is provided at a plurality of positions in a width direction crossing the sheet feeding direction,   the fin is provided at a plurality of positions corresponding to the slits, and   at least two of the fins are in contact with the document placed on the sheet feeding tray.   
     
     
         3 . The document conveying device according to  claim 1 , wherein
 edge portions of the slit protrude upstream of the sheet feeding direction, and   a tip of the fin and tips of the edge portions of the slit on both sides of the fin form a same plane.   
     
     
         4 . The document conveying device according to  claim 1 , wherein
 an upper end portion of the fin is inclined such that a downstream side portion in the sheet feeding direction is high.