| 摘要 |
PURPOSE:To improve the opening/closing function of a front window opening/closing device by forming a front window into the curved face curved into circular-arc shape, and allowing the front window to be fixed in the locked state at the opening/closing time of the front window. CONSTITUTION:A front window 12 is formed into the curved face curved into approximately circular-arc shape from the side view, and the side view shape of a cab 11 from the front face to the upper face is formed into the curved face along the front window 12, over the moving range of the front window 12. A roller guide rail 15 is disposed approximately parallel along the front window 12. When opening/closing operation is performed in the state of the rollers 13 of the front window 12 being fitted to the roller guide rails 15, the front window 12 can be moved along the inside of the front face and upper face of the cab 11. At the time of stopping the front window 12 in a required position in its moving range, a switch 25 is operated off. A drive motor 19 stops its rotation, but an off-operation signal is inputted into a controller 23, so that driving signals are outputted to locking motors 14, 14' when the drive motor 19 is stopped. The front window 12 can be thereby stopped in an optional position and fixed in the locked state. |
