10. A document feeding device, comprising: a carrying unit capable of carrying thereon a plurality of documents; a drawing device to draw and supply the carried documents; a drawing device drive source to drive the drawing device; a separation unit including a separation device to separate the supplied documents one by one; a separation device drive source independent of the drawing device drive source and to drive the separation device; a conveying device to convey the separated documents; a reading unit including a reading device to read information of the conveyed documents; a discharge device to discharge the read documents; a first document detector provided between a document set position of the carrying unit and the separation unit to detect the documents; a second document detector provided downstream of the separation unit and near a separation position of the separation unit to detect the documents, at least the first document detector detecting a trailing end of each of the documents in sheet feeding of the documents; and a controller to control operation of the drawing device based on detection results obtained by the first document detector and the second document detector, wherein the control of the operation of the drawing device is a high-speed conveyance control which sets the document conveying speed of the drawing device to be higher than the document conveying speed of the separation device, and wherein each of the second and subsequent documents is subjected to a pre-separation control which first drives the drawing device to rotate in a direction away from a reading position and then drives the drawing device to rotate in the opposite direction to convey the document toward the reading position.
11. The document feeding device according to claim 10 , wherein the control to perform the high-speed conveyance and the pre-separation is determined on the basis of whether or not the first document detector has detected the trailing end of the document preceding each of the second and subsequent documents.