| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a lighting drive unit of a conventional construction machine, so as to illuminate both right and left of the working machine while preventing a damage due to earth and sand and a short circuit due to wetting with water. <P>SOLUTION: A lamp housing 6a is supported by a horizontal shaft 10 in a vertically swingable and rotatable manner, and a two-pronged bracket 9 supporting the horizontal shaft is supported by a vertical shaft 12 in a horizontally swingable and rotatable manner. The lamp housing 6a is provided with a vertical drive mechanism 11, and the two-pronged bracket 9 is provided with a right-and-left drive mechanism 13. A ballast 8 of a discharge lamp 7 is arranged in the lamp housing 6a and protected from the damage due to earth and sand and water leakage. <P>COPYRIGHT: (C)2011,JPO&INPIT |
