| 摘要 |
PURPOSE:To easily attain the setting of the projection direction and the projection position of a beam light by providing plural marks for aligning the projection direction of the beam light at other edge side of a working process to project the beam light corresponding to respective work processes. CONSTITUTION:A laser light projecting device 1 to project a beam light A for guiding a working vehicle from one edge side toward other edge side along the length direction of a working process is mounted to a moving vehicle 2 used also as the seedling tray to convey the seedling for supplying to a working vehicle V for rice-planting. Wires 3a and 3b are attached along the direction where plural working processes are arranged at respective of one edge side and other edge side of the working process to provide the device 1. At the wire 3a, first plural reflecting plates 4a on a flat plate as a mark to show the projection position of a beam light A and at the wire 3b, second plural reflecting plates 4a as the mark for aligning the projection direction of a beam light A are respectively fitted to the position opposite to plural reflecting plates 4a. Thus, the projection direction of the laser beam and the projection position of the beam light can be easily set. |
