| 摘要 |
PROBLEM TO BE SOLVED: To form an image of good precision on a thick paper, in an image forming device with an inexpensive structure. SOLUTION: The image forming device is constituted of a paper feed tray 2 for holding a thick paper P, a transfer mechanism 3 for transferring the thick paper P held in the paper feed tray 2, an image forming part 4 for forming an image on the thick paper P, a lift motor 8 for vertically moving a platen 34 supporting the thick paper P in transfer, an infrared sensor 7 and a control unit 9 or the like for controlling each part. The infrared sensor 7 outputs to the control unit 9 the time taken after infrared light is irradiated onto the thick paper P held in the paper feed tray 2 until the infrared light reflected from the thick paper P is received. When an image is formed on the thick paper P, the control unit 9 uses the time output from the infrared sensor 7 to measure the thickness of the thick paper P, driving the lift motor 8 based on the thickness of the paper P to vertically move the platen 34 so that the distance between the print head 43 in the image forming position and the thick paper 43 comes within a fixed range. COPYRIGHT: (C)2009,JPO&INPIT
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