| 摘要 |
PURPOSE:To detect an obstacle existing on the side of a main body by providing on each side of an unmanned carrying car a pair of movable transmitter and receiver that receives signals from the transmitter movably. CONSTITUTION:Light projectors 10 that become transmitters and light receivers 11 that become receivers are attached to the lower corners of the sides 2c of a main body through springs 12, 12 respectively. When an obstacle approaches the side 2c closer than the projected end of a bumper 5, the light receivers 11 do not detect light 13 from the light projectors 10, and thereby, presence of an obstacle is detected. When the obstacle comes into contact with one of light projectors and receivers 10, 11, one of light projectors and receivers 10, 11 moves resisting the force of springs 12, and optical axes of the projectors and receivers 10, 11 become discordant. In this case too, light receiving in the light receiving sections 11 is intercepted and the obstacle is detected. Driving of the unmanned carrying car 1 is stopped by this detecting action. Thus, the safety can be secured.
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