| 摘要 |
PURPOSE:To perform radio control for discharge of earth and sand safely and surely, by performing the switching of an earth and sand discharge door of an earth and sand carrying ship and accompanied various operations with a radio operation from a towing main ship and displaying the operation by display lamps by color. CONSTITUTION:An earth and sand transportation ship 1 providing an antenna 16 for reception and transmission receives an instruction signal transmitted from a radio device 17 of a towing main ship 3 and is operated. Pressurized oil is delivered to a hydraulic cylinder 9 to move a reciprocating lever 8, to choke an earth and sand discharge door 5 or open it. On the other hand, an operating room of the earth and sand carrying ship on the main ship 3 receives a signal from the carrying ship 1 and makes transmission of instructions while confirming the switching operation by means of display lights operated via relay circuits. |
