| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that an enormous damage is imparted to an operator and a person around this by a noise of an engine and emission of an exhaust gas when a crane loaded on the existing truck is driven. SOLUTION: In the electric crane for a truck, the crane loaded on the truck can be driven by a power from a commercial power source. Since the crane loaded on the truck can be operated by the commercial power source, a noise is less, a waste gas is not generated and environment preservation is carried out to the optimum. An electric hydraulic pump is loaded as a compact device and is simply added to the existing device. It can be used as the electric crane at a place where the commercial power source exists. COPYRIGHT: (C)2003,JPO
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