| 摘要 |
PROBLEM TO BE SOLVED: To further accurately grasp a distance from an upper revolving body of an image appearing in its image, when displaying the image on a monitor on a rear visual field from a camera arranged in a rear part of the upper revolving body of a work vehicle. SOLUTION: The image from the camera 20 is superposed on an image screen of the monitor 21, and is set so that graduations 22 are displayed as a distance display line. These graduations 22 are a circular arc shape with the revolving center A of the upper revolving body 4 provided with the camera 20 as the center. A circular arc with a rear end part T of a counterweight 16 being the rearmost part of the upper revolving body 4 as a radius, is set as graduations 22<SB>0</SB>being the origin of the graduations 22, and is successively formed in a plurality like graduations 22<SB>1</SB>, 22<SB>2</SB>, ..., 22<SB>n</SB>backward from a position of these origin graduations 22<SB>0</SB>. COPYRIGHT: (C)2005,JPO&NCIPI
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