Patent ID: 7946578

Claim:
An automatic original conveying device comprising: an original mounting platen for placing an original; an original delivery table that is provided downstream of the original mounting platen in an original conveying direction for delivering an original after completion of reading of an original; a first conveying path that guides an original placed on the original mounting platen to a reading position provided upstream of the original delivery table in the original conveying direction; a paper delivery path that guides the original in a region between the reading position and the original delivery table; a switchback conveying path receives the original from the paper delivery path and allows the original to stand by; a second conveying path that receives the original from the switchback conveying path and guides the original to the first conveying path; a sheet feeding roller that conveys the original guided by the paper delivery path, and conveys the original that stands by in the switchback conveying path, to the second conveying path; a sorting unit that sorts the original conveyed from the paper delivery path by the sheet feeding roller as an original to be delivered to the original delivery table or as an original that is allowed to stand by in the switchback conveying path; a switchback roller that is provided between the sorting unit and the switchback conveying path and that is rotatable in a normal direction or a reverse direction; a rotation driving source that is rotated in a single direction; a driving force transmission mechanism that transmits a rotation driving force generated by the rotation driving source from the sheet feeding roller to the switchback roller, the driving force transmission unit includes a rotation switching mechanism that performs switching between rotation in the normal direction and the reverse direction of the switchback roller in conjunction with operation of the sorting unit; and a solenoid member that performs switching of the rotation switching mechanism between the rotation in the normal direction and the reverse direction of the switchback roller by being switched between an energized state and an unenergized state, and when the solenoid member is in the energized state, the rotation switching mechanism rotates and drives the switchback roller in the normal direction so that the original is conveyed to the switchback conveying path.