| 摘要 |
PURPOSE:To slightly cause divergence of a light receiving position even if light receiving direction of a light sensor is longitudinally reversed, by constituting the light sensor in such a way that the longitudinal direction of the light sensor is freely variable around an axial center extending in the crosswise direction of a chassis. CONSTITUTION:Side parts of a chassis of a working vehicle for transplanting of rice seedling are equipped with a pair of before and behind of light sensors S1 and S2 to receive guiding beam light A projected from one end of operating process to the other end, respectively. The light sensors S1 and S2 are longitudinally reversed around cross axial centers P and Q extending the crosswise direction of the chassis, respectively and positions in the crosswise direction of the chassis are made to have slight errors in the forward and backward directions. |
