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(11) | EP 2 354 075 A1 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Power feeding device and rubber tired gantry crane including the same |
(57) A power feeding device includes two storage batteries (45, 46) and supplies power
to a load (25A to 25D, 28, 29, 76) of an RTG 18 from one of the two storage batteries
(45, 46) (the storage battery (45) (or the storage battery (46))). The other storage
battery (46) (or the storage battery (45)) is connected to storage battery power feeding
means (26,41 to 44, 91, 92) (such as a noncontact-type power feeding system) and thus
put in a chargeable state of being charged with power supplied from the storage battery
power feeding means (26,41 to 44,91,92) . The power feeding device simultaneously
allows discharge of the storage battery (45) (or the storage battery (46)) in the
discharge state and charge of the storage battery (46) (or the storage battery (45))
in the chargeable state. In addition, the power feeding device comprises storage battery
switching means (storage battery switching switches (47, 48) and a control device
(77)) for repeatedly performing storage battery switching to switch the storage battery
(45) (or the storage battery (46)) in the discharge state to the chargeable state
and at the same time to switch the storage battery (46) (or the storage battery (45))
in the chargeable state to the discharge state.
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{Technical Field}
{Background Art}
{Citation List}
{Patent Literatures}
{Summary of Invention}
{Technical Problems}
{Solution to Problems}
{Advantageous Effects of Invention}
{Brief Description of Drawings}
{Fig. 1} Fig. 1 is a view showing a configuration example of a general container yard to which a rubber tired gantry crane according to an embodiment of the present invention is applied.
{Fig. 2} Fig. 2 is an enlarged perspective view of the rubber tired gantry crane according to the embodiment of the present invention.
{Fig. 3} Fig. 3 is a diagram showing a configuration of and charge and discharge states in a power feeding device of the rubber tired gantry crane according to the embodiment of the present invention.
{Fig. 4} Fig. 4 is a diagram showing the configuration of and charge and discharge states in the power feeding device of the rubber tired gantry crane according to the embodiment of the present invention.
{Fig. 5} Fig. 5 is a diagram showing a different configuration of and charge and discharge states in the power feeding device of the rubber tired gantry crane according to the embodiment of the present invention.
{Fig. 6} Fig. 6 is a diagram showing the different configuration of and charge and discharge states in the power feeding device of the rubber tired gantry crane according to the embodiment of the present invention.
{Fig. 7} Fig. 7 is a diagram showing a configuration of and charge and discharge states in a power feeding device of a rubber tired gantry crane according to a reference example.
{Fig. 8} Fig. 8 is a diagram showing the configuration of and charge and discharge states in the power feeding device of the rubber tired gantry crane according to the reference example.
{Fig. 9} Fig. 9 is a chart showing how energy is consumed and generated during container handling by the rubber tired gantry crane of the embodiment.
{Fig. 10} Fig. 10 is a diagram showing a configuration of and charge and discharge states in a power feeding device of a conventional rubber tired gantry crane.
{Fig. 11} Fig. 11 is a diagram showing the configuration of and charge and discharge states in the power feeding device of the conventional rubber tired gantry crane.
{Description of Embodiments}
{Industrial Applicability}
{Reference Signs List}
11 CONTAINER TERMINAL
12 CONTAINER SHIP
13 CONTAINER
14 GANTRY CRANE (GC)
15 CONTAINER YARD
16 AUTOMATED GUIDED VEHICLE (AGV)
17 CONTAINER STORAGE SECTION
18 RUBBER TIRED GANTRY CRANE (RTG)
21 GANTRY
21A BEAM
21B LEG
21C SUPPORT
22 TROLLEY
23A, 23B, 23C, 23D DOLLY
24A, 24B, 24C, 24D TIRE
25A, 25B, 25C, 25D DRIVE ELECTRIC MOTOR
26 POWER FEEDING CABLE
27 HOIST
28 HOIST ELECTRIC MOTOR
29 TRANSVERSE MOVEMENT ELECTRIC MOTOR
30 WIRE ROPE
31 SPREADER
32 POWER FEEDING DEVICE
41 CHARGING BOARD
42 GROUND TRANSFORMER
43 GROUND HIGH VOLTAGE BOARD
44 POWER RECEIVING UNIT
45, 46 STORAGE BATTERY
47 STORAGE BATTERY SWITCHING SWITCH
47a FIRST CONTACT POINT
48b SECOND CONTACT POINT
48 STORAGE BATTERY SWITCHING SWITCH
48a FIRST CONTACT POINT
48b SECOND CONTACT POINT
49, 50, 51, 52, 53, 54 INVERTER UNIT
55, 56, 57, 58, 59, 60 CONVERTER
61, 62, 63, 64, 65, 66 INVERTER
67, 68, 69, 70, 71, 72, 73 ELECTROMAGNETIC SWITCH
74 REACTOR
75 TRANSFORMER
76 AUXILIARY
77 CONTROL DEVICE
81 STORAGE BATTERY
91 POWER GENERATING EQUIPMENT
92 CONVERTER
REFERENCES CITED IN THE DESCRIPTION
Patent documents cited in the description