| 摘要 |
PROBLEM TO BE SOLVED: To provide a power feeding device capable of realizing a full battery RTG (Rubber Tired Gantry Crane) and a tire type gantry crane including the same. SOLUTION: This power feeding device includes two storage batteries 45 and 46, and supplies electric power to a load of an RTG 18 by one (the storage battery 45 or the storage battery 46) of the two storage batteries 45 and 46, wherein the other storage battery 46 (or the storage battery 45) is connected to a storage battery power feeding means (such as a noncontact type power feeding system) and put in a chargeable state of charging supply electric power from the storage battery power feeding means, and simultaneously allows discharge of the storage battery 45 (or the storage battery 46) of a discharge state and charge of the storage battery 46 (or the storage battery 45) of the chargeable state. and comprises a storage battery switching means (storage battery switching switches 47 and 48 and a control device 77) for repeatedly switching the storage battery 46 (or the storage battery 45) of the chargeable state to the discharging state and at the same time for switching the storage battery 45 (or the storage battery 46) of the discharging state to the chargeable state. COPYRIGHT: (C)2011,JPO&INPIT
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