| 摘要 |
<P>PROBLEM TO BE SOLVED: To greatly reduce stop time of crane operation due to charging, continue operation immediately after exchange and improve crane-operating efficiency. <P>SOLUTION: A crane system 1A includes: a battery unit 2 structured by being connected with a plurality of batteries and serving as a power supply for a drive motor for driving a sequence of tires 12, a moving motor for moving a suspending device 15, a lifting and lowering motor for lifting and lowering a hoisting accessory 16 supported by the suspending device 15, and peripheral devices. The battery unit 2 is detachably provided. <P>COPYRIGHT: (C)2012,JPO&INPIT |
