| 摘要 |
PROBLEM TO BE SOLVED: To improve the visibility of a display image by avoiding a monitor display from being frequently switched even when a main speed change lever is operated in a repeating pattern such as "backward movement range → neutral range → backward movement range ...".SOLUTION: A control part 65 of a monitoring device includes: lever position discrimination means for discriminating in which range an operating position of a main speed change lever 53 is located, a forward movement range, a neutral range, or a backward movement range. When the main speed change lever is operated from the neutral range to the forward movement range, an image displayed on a monitor 57 is switched to an auger camera image. When the main speed change lever 53 is operated from the neutral range to the backward movement range, an image displayed on the monitor 57 is switched to a back camera image, and when the main speed change lever 53 is operated from the forward movement range or the backward movement range to the neutral range, an image displayed on the monitor 57 is not switched. |
