| 摘要 |
PURPOSE:To eliminate a front collision of conveyance vehicles even if a power interruption occurs during their traveling by obviating the travel of vehicles when the travel of vehicles according to a command allows the vehicles to travel opposite to other traveling vehicles. CONSTITUTION:When a travel command for traveling a conveyance vehicle is generated from a system controller 10, a traveling zone/direction discriminator 114 discriminates the instructed zone and the direction of the vehicle. Then, a traveling zone/direction comparator 115 compares it with the traveling zone/ direction of another traveling conveyance vehicle. If the fact that the instructed travel of the vehicle allows the vehicle to travel opposite to other traveling vehicle is identified, a signal for allowing the vehicle to travel is not output to a travel managing unit 116. Thus, even if a power interruption occurs at any time, it can prevent a front collision of the vehicles. |
