| 摘要 |
PROBLEM TO BE SOLVED: To easily and accurately determine operating condition of each of limit switches. SOLUTION: In response to operating condition of a first overwinding limit switch and a second overwinding limit switch provided corresponding to a boom, a jib, a boom hook and a jib hook of a crawler crane, display color of a boom image 12a, a jib image 12b, a boom hook image 12c and a jib hook image 12d in an illustration 12 of the crane displayed on a screen 11a of an image display device 11 is changed in order from normal green to red through yellow. COPYRIGHT: (C)2009,JPO&INPIT
|
