| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an image forming device capable of certainly detecting whether or not a carried sheet is a prepunched sheet without newly disposing a sensor for detecting a punch hole.SOLUTION: An image forming device includes an image forming part, a sheet feeding part, a pair of register rollers, a sheet feeding sensor, a resister sensor, and control means. The sheet feeding sensor detects a sheet fed from the sheet feeding part. The register sensor detects a sheet reaching the pair of register rollers. The control means determines whether or not the sheet carried from the sheet feeding part is a prepunched sheet on the basis of detection results of the sheet feeding sensor and the register sensor. One of the sheet feeding sensor and the register sensor is disposed at the center in the sheet width direction, and the other is disposed in a range of 36.75-39 mm from the center of the sheet width direction.</p> |
