| 摘要 |
PROBLEM TO BE SOLVED: To remote-control a truck and a hoisting machine for high lift work using a suspended working floor such as a gondola through a wire rope, which is suspended from an upper frame of a structure such as a building or the hoisting machine of the truck, without using a communication cable, with suppressed influence of noise and with low costs. SOLUTION: Cable communication using the suspending wire rope 21 provided with a signal transmission passage by an electric wire 31 is adopted in an area from a working cage 12 as the working floor of the device 11 for high lift work to a rotating drum 22 of the hoisting machine 20, and radio communication using radio transmitting devices 34 and 35 to transmit signals in a short distance is adopted in an area from the drum 22 as a rotating part to a drum frame 22a as a fixed part. With this structure, reliable remote control resistant against the noise and restricted in the costs is applicable even in the case wherein it is hard to use a slip ring. COPYRIGHT: (C)2007,JPO&INPIT
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