Patent ID: 7665731

Claim:
A sheet conveying device comprising: a conveying path that allows a sheet to be conveyed and includes a first guide face and a second guide face opposing and apart from each other at a predetermined interval; a sheet conveying unit disposed on the conveying path; a first detecting unit and a second detecting unit arranged opposing each other across the conveying path, wherein the first detecting unit includes: a first arm member rotatably supported to take a first posture where the first arm member is projected from the first guide face to the conveying path and a second posture where the second arm member is retracted from the conveying path by rotating toward the first guide face; and a first sensor that outputs a signal depending on the first posture or the second posture of the first arm member, and wherein the second detecting unit includes: a second arm member rotatably supported to take a third posture where the second arm member is projected from the second guide face to the conveying path and a fourth posture where the second arm member is retracted from the conveying path by rotating toward the second guide face; and a second sensor that outputs a signal depending on the third posture or the fourth posture of the second arm member; and an image processing unit disposed downstream of the first detecting unit and the second detecting unit on the conveying path and configured to perform a predetermined image processing to the sheet to be conveyed; and a control unit configured to control an operation of the image processing unit based on the detection results of the first detecting unit and the second detecting unit.