| 摘要 |
PURPOSE:To prevent completely the collision of unmanned trucks at the junction by providing a tool to be detected and a start signal projector at the front position of the junction at the ground side together with a start signal photodetector which receives the signal from the signal projector and a detector for tool to be detected set at the truck side respectively. CONSTITUTION:An unmanned truck 1 detects the guide lines 4(4a-4c) of drive paths 2(2a-2c) formed within a factory via a guide line sensor 3 and performs the steering guide by itself to keep its position on the drive path. Here a tool 28 to be detected and a ground side device 10 are set at the ground side together with a detector 29 and a photodetector 30 set at the truck side. The device 10 consists of a controller 13, a start signal projector 14, etc. When the truck 1 reaches an interference zone Z at the junction J, the detector 29 detects the tool 28 set on the floor surface to stop the truck 1. Then the truck 1 receives the signal light from the projector 14 through the photodetector 30 and starts again. The projecting interval of the projector 14 is set at the time when the collision is avoided between trucks. Thus the collision is avoided between unmanned trucks at the junction J. |
