| 摘要 |
PROBLEM TO BE SOLVED: To prevent the danger of vehicle runaway. SOLUTION: A neutral position detection means 15 for detecting that a transmission 5 is in a neutral shift position, an operation detection means 16 for detecting the operation of an operation means 10a switching the drive control valve 10 of an outrigger jack 3, and a drive inhibition means 17 for inhibiting the drive of the outrigger jack 3 are provided, and when the outrigger jack 3 is driven with the transmission 5 in a non-neutral position, the drive inhibition means 17 is actuated and the neutral position detection means 15, the operation detection means 16, and the drive inhibition means 17 are electrically associated and connected with one another so that the drive of the outrigger jack 3 is disabled.
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