| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a crane for preventing an operation by an erroneous operation. <P>SOLUTION: Between a pendant switch 19 and respective drive units 9, 10 and 11, a controller 20 is provided including an output part 22 for outputting sound signals output from a sound input part 21 of the pendant switch 19 as operation signals corresponding to the operation contents of the drive units 9, 10 and 11 registered beforehand, and a comparison part 23 for making comparison of the operation signals output from push buttons 13-18 of the pendant switch 19 and outputting the operation signals to the corresponding drive units 9, 10 and 11 when they are the same operation signals. By pushing the push buttons 13-18 along the operation contents from the plurality of push buttons 13-18 of the pendant switch 19 and inputting sound along the operation contents, an operator confirms the operation contents of the crane 1 by the push buttons 13-18 and the sound, the erroneous operation is prevented. <P>COPYRIGHT: (C)2013,JPO&INPIT |
