Patent ID: 6955350

Claim:
A sheet member positioning device comprising: a plate on which a sheet member is loaded; a reference member provided at a side, in a first direction, of the plate, the sheet member being able to abut the reference member; a judging mechanism which judges whether the sheet member has reached a predetermined position; a moving device which includes a motor and a control device, the moving device being controlled by the movement of the motor and the control device; a conveying member provided at a side, in a second direction, of the plate, and due to the conveying member being moved toward the side in the first direction and conveying the sheet member, the conveying member makes the sheet member abut the reference member so as to determine a position of the sheet member in the first direction, wherein the conveying member is moved automatically by the moving device when the judging mechanism judges that said sheet member has reached the predetermined position; and a detecting mechanism which, at a time when the position of the sheet member in the first direction is determined, detects a distance between the reference member and the conveying member, and detects a size of the sheet member on the basis of the detected distance.