| 摘要 |
PURPOSE:To prevent danager of a person in contact with a mounted truck even if the person accesses the titled carrier during the operation of the mounted truck by providing a forward/backward detector detecting an near or remote obstacle in the forward/backward direction of the carrier and detecting the vicinity at the operation of the mounted truck. CONSTITUTION:A forward detector 12 and a backward detector 13 are provided respectively to the forward/backward part of the carrier 3 with a mounted truck 11 installed thereupon. A detection selecting means 14 selects the forward detector 12 at the forward movement of the carrier 3 and the backward detector 13 at the backward movement so as to detect a reflected wave from a remote obstacle among the reflected waves detected by the detectors, a control means 15 outputs stop command to stop the carrier 3 tentatively. Moreover, the reflected wave from a near obstacle among reflected wave detected by the forward/backward detectors 12, 13 is detected during operation of the mounted truck 11, a stop command is output from the control means 15 to stop the mounted truck 11 tentatively. Thus, even when a person accesses the carrier during the operation of the mounted truck, the danager in contact with the mounted truck is prevented.
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