WO2009119791A1 - Crane feed system and method - Google Patents

Crane feed system and method Download PDF

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Publication number
WO2009119791A1
WO2009119791A1 PCT/JP2009/056251 JP2009056251W WO2009119791A1 WO 2009119791 A1 WO2009119791 A1 WO 2009119791A1 JP 2009056251 W JP2009056251 W JP 2009056251W WO 2009119791 A1 WO2009119791 A1 WO 2009119791A1
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WO
WIPO (PCT)
Prior art keywords
rail
power supply
power
crane
partial
Prior art date
Application number
PCT/JP2009/056251
Other languages
French (fr)
Japanese (ja)
Inventor
栢菅　信哉
Original Assignee
三井造船株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三井造船株式会社 filed Critical 三井造船株式会社
Priority to KR1020107021220A priority Critical patent/KR101290242B1/en
Priority to CN200980110897.0A priority patent/CN101980945B/en
Publication of WO2009119791A1 publication Critical patent/WO2009119791A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
    • B66C19/007—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries for containers

Definitions

  • the present invention relates to a crane power feeding technique, and particularly to a crane power feeding technique for supplying power from a power feeding rail to a crane device.
  • a method of supplying power via a trolley wire installed along a lane as a power supply system that supplies power to a crane device such as a gate-type transfer crane device that loads and unloads a container with respect to a trailer in a container terminal See, for example, JP-A-2003-137494.
  • a crane apparatus when a moving body such as a person or a vehicle other than the crane apparatus enters the lane, it is necessary to prevent an electric shock to the trolley wire. For this reason, when the structure which insulates an overhead wire along a lane is installed, it becomes impossible for a mobile body to move freely across a lane.
  • a trolley wire is installed along a lane having an extremely long distance provided in a container terminal, and a structure such as a passage for insulating the trolley wire is continuously provided along the trolley wire. It is necessary to install. For this reason, the container worker and the trailer for transporting the container cannot cross the lane and need to make a detour to the end of the lane. Further, in the case of a tire type transfer crane device, since the straight traveling accuracy is not so high, the current collecting structure for maintaining the power supply from the trolley wire becomes complicated.
  • a method using a power supply rail instead of the trolley wire can be considered. If this power supply rail is provided on the ground, it is possible for a person to straddle and cross it, and if it is provided at almost the same height as the ground, it is possible for a vehicle or device to move freely across the road. . Moreover, even if the traveling device has a low straight traveling accuracy such as a crane device, the power supply can be easily maintained by giving the cart that collects power by traveling on the power supply rail. However, when the power supply rail is used, the contact portion between the power supply rail and the carriage cannot be insulated, and there is a problem that an electric shock may occur when a moving body passes on the power supply rail.
  • the present invention is intended to solve such a problem, and an object of the present invention is to provide a crane power feeding system and method capable of preventing an electric shock at a power feeding rail provided on the ground.
  • a crane power feeding system includes a crane device that operates by a power source supplied from the outside, and a feeding rail that is provided along a lane in which the crane device travels.
  • a power supply unit that supplies power to the power supply rail, and a current collector that collects power supplied from the power supply unit by making electrical contact with the power supply rail on the crane device;
  • a plurality of electric rails that are electrically insulated from each other are provided by covering a part of the power supply rail including the electric point as a protective section from above, thereby providing an electric shock protection unit that protects against electric shock to the power supply rail in the protective section.
  • the rail length of the partial rail is equal to or less than the protection distance from the end point of the protection section to the current collecting point. Supplying the source power only to the part rails are in electrical contact.
  • the crane power supply method includes a crane device that operates with power supply supplied from the outside, a power supply rail provided along a lane in which the crane device travels, and a power supply for the power supply rail.
  • a crane power supply method used in a crane power supply system including a power supply unit that supplies electric power, wherein the power supply supplied from the power supply unit by electrically contacting the power supply rail via a current collector is collected by a crane device.
  • a step of collecting power a step of protecting an electric shock to the power supply rail in the protection section by covering a part of the power supply rail including the current collection point as a protection section from above with a crane device;
  • the rail length is equal to or less than the protection distance from the end point to the current collecting point.
  • all the partial rails that are in electrical contact with the current collector can be covered with the cover. For this reason, the partial rail that is being fed is not exposed from the cover, and it is possible to suppress electric shock to the partial rail that is being fed. Therefore, any moving body such as a person, a vehicle, or a device can safely cross the power supply rail provided in the lane where the crane device travels, and a complicated configuration is used. It is possible to provide a ground power supply method.
  • FIG. 1 is an explanatory diagram of a crane power feeding system according to a first embodiment of the present invention.
  • FIG. 2 is a side view showing the configuration of the crane apparatus.
  • FIG. 3 is a front view showing the configuration of the crane apparatus.
  • FIG. 4 is a plan view showing a configuration example of the container terminal.
  • FIG. 5 is a plan view showing a main part of the power supply rail.
  • FIG. 6 is a front view showing a main part of the power supply rail.
  • FIG. 7 is a cross-sectional view showing the main part of the power supply rail.
  • FIG. 8 is a block diagram showing the configuration of the switch.
  • FIG. 9 is an explanatory diagram illustrating the relationship between the current collectors and the partial rails of the crane power feeding system according to the first embodiment of the present invention.
  • FIG. 9 is an explanatory diagram illustrating the relationship between the current collectors and the partial rails of the crane power feeding system according to the first embodiment of the present invention.
  • FIG. 9 is an
  • FIG. 10 is an explanatory diagram illustrating an example of a power feeding operation of the crane power feeding system according to the first embodiment of the present invention.
  • FIG. 11 is an explanatory diagram illustrating another power feeding operation of the crane power feeding system according to the first embodiment of the present invention.
  • FIG. 12 is an explanatory diagram illustrating a relationship between the current collectors and the partial rails of the crane power feeding system according to the second embodiment of the present invention.
  • FIG. 13 is an explanatory diagram illustrating an example of a power feeding operation of the crane power feeding system according to the second embodiment of the present invention.
  • This crane power supply system is a power supply system based on a ground power supply system that supplies power to the crane device 6 from the ground, and mainly includes the crane device 6, the power supply rail 1, and the power supply unit 2.
  • the power feeding unit 2 is a facility device that is installed outside the crane device 6 such as on the ground or underground and supplies power power 25 of the crane device 6.
  • the crane device 6 is a vehicle device that collects power supply power 25 via the current collector 4 and travels on a lane based on the power supply power 25 to perform cargo handling at an arbitrary position.
  • the power supply rail 1 is provided on the ground G along the lane of the crane device 6 and electrically contacts the current collector 4 of the crane device 6 at the current collection point P, thereby supplying power to the crane device 6. It is a rail.
  • the crane device 6 is covered (protected) from a part of the power supply rail 1 including the current collection point P as a protection section S from above, thereby protecting (preventing) electric shock on the power supply rail 1 in the protection section S.
  • the cover 3 (electric shock protection portion) is provided, and the power supply rail 1 is constituted by a row of a plurality of partial rails 11 that are electrically insulated from each other.
  • the rail length L of the partial rail 11 is defined as an end point of the protection section S.
  • the power source 25 is supplied only to the partial rail 11 that is in electrical contact with the current collector 4 among the partial rails 11 by the power feeding unit 2 with a length equal to or shorter than the protective distance W from E to the current collecting point P. It is what I did.
  • the crane device 6 is a crane device such as a gate-type transfer crane device that loads and unloads a container on a trailer in a container terminal.
  • the crane device 6 for example, power supply power 25 for traveling along a lane provided in a container terminal and performing cargo handling at an arbitrary position is supplied from a power supply rail 1 provided on the ground.
  • a current collector 4 for collecting current is provided.
  • the crane device 6 includes a protection section S that covers a part of the power supply rail 1 including the current collection point P where the power supply rail 1 and the current collector 4 are in electrical contact with each other.
  • a cover 3 for protecting the electric shock on the power supply rail 1 in the section S is provided.
  • the positional relationship between the end points of the protection section S and the current collecting point P is fixed, and the protection section S moves on the power supply rail 1 according to the traveling of the crane device 6.
  • the protection section S may be formed by using both of them, or a plurality of these parts may be combined to form the protection section S.
  • the power supply rail 1 is provided along the lane in which the crane device 6 travels, and feeds the power source 25 to the crane device 6 by making electrical contact with the current collector 4 of the crane device 6 at the current collection point P. It is a rail.
  • the power supply rail 1 is composed of a row of a plurality of partial rails 11 that are electrically insulated from each other.
  • the partial rail 11 has a rail length L equal to or less than a protection distance W from the end point E of the protection section S to the current collection point P. have.
  • the power feeding unit 2 is a facility device installed on the ground including the underground, and includes a power supply device 21 and a switching unit 22.
  • the power supply device 21 has a function of converting power generated by the power generation facility into a predetermined voltage and supplying power power 25 of the crane device 6.
  • Examples of the power source 25 for the crane device 6 include a DC power source, an AC power source, and a three-phase AC power source.
  • the switching unit 22 includes a switching device 23 provided between the power supply device 21 and each partial rail 11.
  • the switching device 23 has a function of switching and supplying the power supply 25 to the partial rail 11 only during a period when the electrical contact of the current collector 4 of the crane device 6 with respect to the corresponding partial rail 11 is detected. Yes. Accordingly, the power supply unit 2 supplies the power supply power 25 only to the partial rail 11 that is in electrical contact with the current collector 4 of the crane device 6 in the power supply rail 1.
  • the rail length L of the partial rail 11 is limited to the protection distance W from the end point E of the protection section S to the current collection point P or less. For this reason, even when one end of the partial rail 11 is in electrical contact with the current collector 4 and the power supply power 25 is supplied to the partial rail 11, the section where there is a possibility of electric shock with respect to the partial rail 11 is not collected. The section is from the electrical point P to the rail length L.
  • the cover 3 of the crane device 6 is always protected against electric shock for the power supply rail 1 in the protection section S at the protection distance W from the current collection point P. Accordingly, in the power supply rail 1, the electric shock is always protected by the cover 3 for the partial rail 11 to which the power supply power 25 is supplied via the switching device 23.
  • the crane apparatus 6 is composed of a gantry 60 composed of a portal frame as a whole.
  • the gantry 60 includes an upper beam 6A, leg portions 6B that support both ends of the beam 6A, and a base 6C that supports the leg portions 6B.
  • a tire 6E is provided below the base 6C via a carriage 6D. The tire 6E is supported by the carriage 6D so that the traveling direction can be freely changed to a forward direction X along the lane or a perpendicular direction Y orthogonal to the lane.
  • an upper portion of the base 6C sandwiched between the leg portions 6B is in contact with a power supply device or a power storage device that supplies power to each unit with the power source collected by the current collector 4, and further to the current collector 4.
  • a device unit 6G that houses an electrical device such as a signal output device that outputs a power supply request signal 24 to the partial rail is provided.
  • a trolley 6H is provided on the beam 6A at the upper portion of the gantry 60, and the trolley 6H travels on the rail of the beam 6A in the right-angle direction Y by driving the traverse motor 6L mounted on the trolley 6H. .
  • a spreader 6I for suspending the upper portion of the container 9 is suspended from the trolley 6H via a cable 6J.
  • the main winding motor 6M placed on the trolley 6H is driven to drive the cable 6J. By performing the winding up and down, the spreader 6I moves up and down.
  • the trolley 6H is provided with electrical equipment such as a command room 6K on which an operator is boarded and a controller.
  • the cover 3 is an outer lower portion of the base 6C, and is attached between the two carriages 6D at a position facing the power supply rail 1 on the ground G via the support member 5 and the arm 5A. By covering a partial section of the power supply rail 1 including from above, electric shock in the section is protected.
  • the current collector 4 attached to the cover 3 is always in electrical contact with the power supply rail 1 by traveling or sliding on the power supply rail 1 even when the crane device 6 is traveling. Power supply power from the power supply device 21 collected by the current collector 4 is input to the crane device 6.
  • the container terminal 70 is provided facing the port wharf 7A, and the container 9 is loaded and unloaded from the ship 7B by a container crane 7C disposed on the wharf 7A.
  • the container terminal 70 is provided with a plurality of lanes 71 each having a rectangular area extending along the longitudinal direction of the container 9, that is, the forward direction X.
  • the crane device 6 travels in the forward direction X in the lane 71.
  • the containers 9 placed in the lane 71 are sorted efficiently.
  • the container terminal 70 is provided with a gate 73 on the road 72 side, and the trailer 91 passes through the gate 73 to carry in / out the container 9 and transport the container 9 to other locations in the container terminal 70. I do.
  • the lane 71 is provided with a passage for the trailer 91, and the container 9 is loaded and unloaded by the crane device 6 on the trailer 91 stopped in this passage.
  • the power supply device 21 of the crane power feeding system is arranged on the ground or underground at the end of the lane 71, and the power feeding rail 1 extends along the forward direction X at the side end of the lane 71. It is installed.
  • the crane apparatus 6 is supplied with power from a power supply device 21 via a current collector 4 that is in electrical contact with the power supply rail 1.
  • each partial rail 11 has a rail length L that is equal to or shorter than the protection distance W from the end point E of the protection section S to the current collection point P by the current collector 4. For this reason, the supplied partial rail 11 is completely protected from electric shock by the cover 3, and there is no risk of electric shock.
  • the power supply rail 1 is composed of two power supply rails 1A and 1B provided in parallel in a groove 12 formed on the ground G. These power supply rails 1A and 1B are composed of a row of a plurality of partial rails 11A and 11B that are electrically insulated from each other. These partial rails 11A and 11B only have to have a rail length L that is equal to or less than the protection distance W from the end point E of the protection section S to the current collecting point P, and all of these partial rails need to have the same rail length L. There is no. As for the insulating portion 13, a general insulator such as resin may be used, and a space provided between adjacent partial rails may be used as the insulator. A DC power supply or an AC power supply is supplied from the power supply device 21 through the two supply rails 1A and 1B.
  • the cover 3 of the crane device 6 is composed of a box-shaped main body 3A having an opening at the bottom facing the power supply rail 1, and covers a part of the power supply rail 1 including the current collection point P from above by covering the section 3A.
  • the main body 3A may be made of a member that can prevent an electric shock of an operator, and may be a plate-like member or a plate-like member having a vent hole. Or you may comprise 3 A of main bodies with a cage
  • the current collectors 4A and 4B are wheels that are rotatably supported in the inner chamber of the cover 3 via the axle 4X, and are electrically connected to the power supply rails 1A and 1B by rolling on the power supply rails 1A and 1B.
  • the power supply power 25 is collected from the power supply rails 1A and 1B.
  • the current collectors 4A and 4B have a partial rail 11A in which the protection distance W between the current collection point P in contact with the power supply rails 1A and 1B and the end point E of the protection section S of the cover 3 constitutes the power supply rails 1A and 1B. , 11B is supported at a position that is longer than the rail length L.
  • One end of the arm 5A is rotatably attached to the end of the support member 5, and the other end is rotatably attached to the upper part of the main body 3A.
  • One end of the hydraulic cylinder 5B is rotatably attached to the side portion of the support member 5, and the other end is rotatably attached to the middle of the arm 5A.
  • a hydraulic circuit (not shown) is controlled so that, for example, hydraulic oil on the rod side and the head side of the hydraulic cylinder 5B is communicated via a reservoir tank (not shown).
  • the arm 5 ⁇ / b> A is brought into a state in which the arm 5 ⁇ / b> A can freely rotate up and down with the support member 5 as a fulcrum.
  • the cover 3 is lowered by its own weight, and the current collector 4 of the cover 3 comes into electrical contact with the power supply rail 1 on the ground G. Accordingly, since the vertical movement of the crane device 6 is not transmitted to the cover 3, the current collector 4 can smoothly run or slide on the power supply rail 1 even when the ground G undulates or the crane device 6 shakes. it can.
  • a hydraulic circuit (not shown) is controlled to supply hydraulic oil from an oil pump (not shown) to the rod side of the hydraulic cylinder 5B, for example, and the head side hydraulic oil is returned to the reservoir tank.
  • the cover 3 may be lifted from the ground G by lifting the arm 5A.
  • the cover 3 may be pressed against the ground G via the arm 5A by increasing the internal pressure of the hydraulic cylinder 5B to some extent.
  • the upper limit of the internal pressure of the hydraulic cylinder 5B may be adjusted by the relief valve of the hydraulic cylinder 5B so that a predetermined pressure or more is not applied to the cover 3. Thereby, it is possible to improve current collection efficiency.
  • the partial rail 11 constituting the power supply rail 1 is provided with a switching device 23 for controlling the supply of power from the power supply device 21 to each partial rail 11.
  • the switching device 23 is provided with a detector 23A and a switch 23B as main functional units.
  • the detector 23A includes a dedicated circuit unit such as a signal detection circuit, and has a function of detecting and outputting the presence / absence of a power supply request signal 24 output from the crane device 6 via the partial rail 11. For example, if the power supply request signal 24 is always output from the power supply unit (not shown) of the crane device 6 via the current collector 4, only the partial rail 11 in electrical contact with the current collector 4 is automatically Therefore, the power supply request signal 24 is output.
  • a high-frequency signal having a predetermined frequency is used as the power supply request signal 24, the power supply request signal 24 output to the partial rail 11 from the crane device 6 can be obtained by providing a filter circuit for selecting the frequency signal component in the signal detection unit 23A. It can be detected.
  • the switch 23B is composed of a dedicated circuit unit such as a relay circuit, and based on a detection output indicating whether or not the power supply request signal 24 is detected from the detector 23A, the power supply from the power supply device 21 to the corresponding partial rail 11 is provided. It has a function of supplying power 25 by switching. Thereby, only when the power supply request signal 24 is detected by the detector 23A, the power supply power 25 is supplied to the partial rail 11 based on the detection output, and the power supply request signal 24 is not detected by the detector 23A. The supply of the power supply 25 to the partial rail 11 is stopped based on the detection output.
  • the length of the wiring cable connecting the switching device 23 and the partial rail 11 can be shortened. Further, by routing the wiring cable from the power supply device 21 along the power supply rail 1 and branching the wiring cable to connect to each switching device 23, or by connecting the wiring cable by each switching device 23, Power supply power can be supplied from the power supply device 21 to each switching device 23. Therefore, the length of the wiring connecting the power supply device 21 and each switching device 23 can be shortened, and the wiring work burden can be greatly reduced.
  • FIG. 9 shows an example in which the cover 3 is provided with two current collectors 41 and 42.
  • the positions of the current collectors 41, 42, that is, the current collecting point P are separated from the end point E of the protection section S by the protection distance W.
  • the rail length L of the partial rails 11X, 11Y, and 11Z is equal to or less than the protection distance W.
  • a case where the distance between the two current collectors 41 and 42 is shorter than the rail length L will be described as an example.
  • the current collector 41 When the cover 3 moves in the X direction on the power supply rail 1 and enters the partial rail 11X, the current collector 41 is in electrical contact with the partial rail 11X for the first time at time T1, and the partial current from the partial rail 11X at time T3. It moves to the rail 11Y, moves from the partial rail 11Y to the partial rail 11Z at time T5, and leaves the partial rail 11Z at time T7.
  • the current collector 42 is in electrical contact with the partial rail 11X for the first time at time T2, moves from the partial rail 11X to the partial rail 11Y at time T4, and moves from the partial rail 11Y to the partial rail 11Z at time T6. It leaves
  • the current collector 41 is initially in contact with the partial rails 11X, 11Y, and 11Z at times T1, T3, and T5, respectively.
  • the rail length L of these partial rails varies from the current collection point P to the end point E of the protection section S. Or less than the protection distance W. For this reason, at time T1, T3, T5, when the current collector 41 first contacts one end of the partial rail, the other end of the partial rail is already hidden under the cover 3.
  • the current collector 42 is detached from the partial rails 11X, 11Y, and 11Z at times T4, T6, and T8, respectively.
  • the rail length L of these partial rails is the end point of the protection section S from the current collection point P. Less than or equal to the protection distance W to E. Therefore, at time T4, T6, T8, when the current collector 42 is detached from one end of the partial rail, the other end of the partial rail is still hidden under the cover 3.
  • FIG. 10 shows a case where the distance between the two current collecting points P is shorter than the rail length L.
  • the partial rail does not enter between the two current collecting points P.
  • the partial rail 11X enters between the current collectors 41 and 42, that is, between the current collecting points P.
  • power supply to the partial rail 11X is temporarily stopped and restarted. The However, since these power supply stops and restarts are all performed in a state of being hidden under the cover 3, there is no possibility of electric shock.
  • the rail length L of the partial rail may be equal to or less than the protection distance W between the current collecting point P and the end point E of the current collector that is closest to the end point E of the protection section S among the current collectors.
  • the present embodiment is configured such that a current collector that collects the power supplied from the power feeding unit by making electrical contact with the power feeding rail is connected to the crane device, and a power feeding rail including the current collecting point P.
  • a cover electrical shock protection portion
  • the power supply rail is electrically insulated from each other. It consists of a row of rails, and the rail length L of this partial rail is set to a length equal to or shorter than the protective distance W from the end point E of the protection section S to the current collecting point P. Since the power supply power 25 is supplied only to the partial rails that are in contact with each other, all the partial rails that are in electrical contact with the current collector can be covered with the cover.
  • the partial rail that is being fed is not exposed from the cover, and it is possible to suppress electric shock to the partial rail that is being fed. Therefore, any moving body such as a person, a vehicle, or a device can safely cross the power supply rail provided in the lane where the crane device travels, and a complicated configuration is used. It is possible to provide a ground power supply method.
  • the power feeding unit is based on an electrical signal obtained from the partial rail, a detector that detects electrical contact between the partial rail and the current collector, and a detection output of the detector. Since the switch is configured to switch and supply power to the corresponding partial rail, the power can be switched and supplied to any partial rail with a simple configuration. Furthermore, since an electrical signal is output from the crane device to the partial rail with which the current collector is in electrical contact, the electrical contact between the partial rail and the current collector can be detected very easily and accurately. be able to.
  • the power supply rail is configured by a row of partial rails
  • the row of partial rails is provided only in a section where an arbitrary moving body enters the lane of the crane device.
  • the power supply rail may be configured from the above. Thereby, the number of partial rails and switches can be suppressed, and the equipment scale and equipment cost of the crane power feeding system can be reduced.
  • the power supply rail is supported by the cover of the crane device so as to be rotatable and rolls on the power supply rail, and the physical contact point with the power supply rail serves as a current collection point. Since the wheel for collecting power from the power supply is used, it is possible to realize both the function of collecting power from the power supply rail and the function of supporting the cover above the power supply rail. Furthermore, the configuration of the crane power feeding system can be simplified.
  • a current collector 43 is provided in the center of both end points E of the protection section S. Between the current collector 43 and both end points E, the crane device 6 and Is provided with two insulated wheels 44. Like the current collectors 4A and 4B of FIG. 7 described above, these wheels 44 are wheels that roll on the power supply rails 1A and 1B, and are rotatably supported in the inner chamber of the main body 3A via an axle. . As the insulating structure of the wheel 44, a generally known technique such as an insulating axle or bearing may be used.
  • the current collector 43 may use wheels in the same manner as the current collectors 4A and 4B of FIG. 7 described above, but the weight of the cover 3 is supported by the wheel 44, and therefore the current collector 43 supports the weight of the cover 3 by the current collector 43. There is no need. For this reason, you may use the slider pressed so that it may slide with the electric power feeding rail 1.
  • FIG. The position of the current collector 43, that is, the current collecting point P is separated from the both end points E of the cover 3 by a protection distance W.
  • the rail length L of the partial rails 11X and 11Y is equal to or less than the protection distance W.
  • the other structure of the crane electric power feeding system in this Embodiment it is the same as that of 1st Embodiment, and detailed description here is abbreviate
  • the current collector 43 When the cover 3 moves in the X direction on the power supply rail 1 and enters the partial rail 11X, the current collector 43 is in electrical contact with the partial rail 11X for the first time at time T1, and the partial current from the partial rail 11X at time T2. Move to the rail 11Y, move from the partial rail 11Y to the partial rail 11Z at time T3, and leave the partial rail Y at time T7. With such movement of the current collector 43, power is supplied to the partial rail 11X only during the period from time T1 to time T2, and power is supplied to the partial rail 11Y only during the period from time T2 to time T3.
  • the timing when there is a possibility of electric shock includes the time when the current collector 43 first contacts with these partial rails and the time when the current collector 43 leaves the partial rail that has been in contact so far. can give.
  • the current collector 43 is initially in contact with the partial rails 11X and 11Y at times T1 and T2, respectively.
  • the rail length L of these partial rails is equal to or less than the protective distance W from the current collection point P to the end point E of the cover 3. It is. For this reason, at time T1, T2, when the current collector 43 first contacts one end of the partial rail, the other end of the partial rail is already hidden under the cover 3.
  • the current collector 43 is detached from the partial rails 11X and 11Y at times T2 and T3, respectively, but the rail length L of these partial rails is equal to or less than the protective distance W from the current collection point P to the end point E of the cover 3. It is. For this reason, at time T2 and T3, when the current collector 43 is detached from one end of the partial rail, the other end of the partial rail is still hidden under the cover 3. Accordingly, the power supply start and power supply stop for the partial rails 11X and 11Y are performed in a state where the partial rails 11X and 11Y are hidden under the cover 3. For this reason, the supplied partial rail is always hidden under the cover 3, and the electric shock is suppressed by the cover 3 by the supplied partial rail.
  • the current collector of the crane apparatus has a current collection point P in the middle part of the protection section S, and the power collection point P and the end point E of the protection section S are During this period, the wheels that roll on the power supply rail are supported rotatably, so that the cover can be stably supported above the power supply rail even when the current collecting point is located near the center of the cover. Can do. For this reason, the rail length of a partial rail can be brought close to 1/2 of the protection section S, the number of switching devices provided for each partial rail and each partial rail can be minimized, and the equipment of the crane feeding system Scale and equipment costs can be reduced.
  • a plurality of rails constituting the power supply rail 1 are provided in parallel to the outside of one tire 6 ⁇ / b> E of the crane device 6.
  • the position where the power supply rail 1 is provided with respect to the crane device 6 is not limited to this.
  • a plurality of rails constituting the power supply rail 1 may be provided in parallel to the inside of the tire 6E of the crane device 6, or the plurality of rails may be provided in parallel by separating the outer side and the inside of the tire 6E. May be.
  • a plurality of rails constituting the power supply rail 1 may be provided separately from the outside or the inside of the left and right tires 6E that support the gantry 60 of the crane device 6.
  • the power supply rail 1 is used as a power supply rail for the power supply 25 and also used as a travel rail for traveling the cover 3 of the crane device 6.
  • the case has been described as an example, rails according to these purposes may be separately provided in parallel.
  • the case where the power supply rail 1 is provided in the groove 12 provided on the ground G has been described as an example.
  • the present invention is not limited to this. Absent.
  • the power supply rail 1 may be provided on the ground G as it is.
  • a crane power supply technology for supplying power from a power supply rail to a crane device.
  • it is used in a gate-type crane device that performs loading and unloading of a container with respect to a ship or a trailer at a container terminal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

A crane device (6) provided with current collectors (4), which receive power supply power (25) supplied from a feeding section (2) by coming into electrical contact with a feeder rail (1), and a cover (3) (electric shock protection section), which covers part of the feeder rail (1) including current collecting points (P) as the protection section (S) from the above so as to protect an object from an electric shock by the feeder rail (1) at the protection section (S). The feeder rail (1) consists of a line of a plurality of partial rails (11) electrically insulated from one another. Rail lengths (L) of the partial rails (11) are set equal to or less than protection distances (W), which are the distances from end-points (E) to the current collecting points (P) of the protection section (S). The power supply power (25) is supplied only to those partial rails (11) which are in electric contact with the current collectors (4) out of the partial rails (11) by the feeding section (2).

Description

クレーン給電システムおよび方法Crane power feeding system and method
　本発明は、クレーン給電技術に関し、特にクレーン装置に対して給電レールから電源供給を行うクレーン給電技術に関する。 The present invention relates to a crane power feeding technique, and particularly to a crane power feeding technique for supplying power from a power feeding rail to a crane device.
　コンテナターミナル内でトレーラーに対するコンテナの積み降ろしを行う門型のトランスファークレーン装置などのクレーン装置に対して電源給電を行う給電システムとして、レーンに沿って架設されたトロリー線を介して電源給電を行う方法がある（例えば、特開２００３－１３７４９４号公報等参照）。このようなクレーン装置では、レーンにクレーン装置以外の人や車両などの移動体が立ち入る場合、トロリー線への感電を防止する必要がある。このため、レーンに沿って架線を絶縁する構造物を設置した場合、移動体がレーンを横切って自由に移動することが不可能となる。 A method of supplying power via a trolley wire installed along a lane as a power supply system that supplies power to a crane device such as a gate-type transfer crane device that loads and unloads a container with respect to a trailer in a container terminal (See, for example, JP-A-2003-137494). In such a crane apparatus, when a moving body such as a person or a vehicle other than the crane apparatus enters the lane, it is necessary to prevent an electric shock to the trolley wire. For this reason, when the structure which insulates an overhead wire along a lane is installed, it becomes impossible for a mobile body to move freely across a lane.
　特に、トランスファークレーン装置の場合、コンテナターミナル内に設けられた極めて長い距離を有するレーンに沿ってトロリー線を架設し、このトロリー線を絶縁する通路などの構造物をトロリー線に沿って連続して設置する必要がある。このため、コンテナ作業員やコンテナ運搬用のトレーラーは、レーンを横切ることができず、レーンの端部まで遠回りする必要がある。
　また、タイヤ式のトランスファークレーン装置の場合、直進走行精度はそれほど高くないため、トロリー線からの給電を維持するための集電構造も複雑となる。 In particular, in the case of a transfer crane device, a trolley wire is installed along a lane having an extremely long distance provided in a container terminal, and a structure such as a passage for insulating the trolley wire is continuously provided along the trolley wire. It is necessary to install. For this reason, the container worker and the trailer for transporting the container cannot cross the lane and need to make a detour to the end of the lane.
Further, in the case of a tire type transfer crane device, since the straight traveling accuracy is not so high, the current collecting structure for maintaining the power supply from the trolley wire becomes complicated.
　このような給電システムにおいて、トロリー線に代えて給電レールを用いる方法が考えられる。この給電レールを地上に条設すれば人が跨いで横切ることが可能となり、地面とほぼ同じ高さに条設すれば、車両や装置が走行路を横切って自由に移動することが可能となる。また、クレーン装置などのように直進走行精度が低い走行装置であっても、給電レール上を走行して集電する台車に自由度を持たせることにより、給電を容易に維持することができる。
　しかしながら、給電レールを用いた場合、給電レールと台車との接触部分については絶縁することができず、給電レール上を移動体が通過した場合に感電する可能性があるという問題点があった。 In such a power supply system, a method using a power supply rail instead of the trolley wire can be considered. If this power supply rail is provided on the ground, it is possible for a person to straddle and cross it, and if it is provided at almost the same height as the ground, it is possible for a vehicle or device to move freely across the road. . Moreover, even if the traveling device has a low straight traveling accuracy such as a crane device, the power supply can be easily maintained by giving the cart that collects power by traveling on the power supply rail.
However, when the power supply rail is used, the contact portion between the power supply rail and the carriage cannot be insulated, and there is a problem that an electric shock may occur when a moving body passes on the power supply rail.
　本発明はこのような課題を解決するためのものであり、地上に条設した給電レールでの感電を防止できるクレーン給電システムおよび方法を提供することを目的としている。 The present invention is intended to solve such a problem, and an object of the present invention is to provide a crane power feeding system and method capable of preventing an electric shock at a power feeding rail provided on the ground.
　このような目的を達成するために、本発明にかかるクレーン給電システムは、外部から供給された電源電力により動作するクレーン装置と、このクレーン装置が走行するレーンに沿って条設された給電レールと、この給電レールに対して電源電力を供給する給電部とを備え、クレーン装置に、給電レールと電気的に接触することにより給電部から供給された電源電力を集電する集電子と、当該集電点を含む給電レールの一部を保護区間としてその上方から覆うことにより、当該保護区間での給電レールに対する感電を保護する感電保護部を設け、給電レールを、互いに電気的に絶縁された複数の部分レールの列から構成し、部分レールのレール長を、保護区間の端点から集電点までの保護距離以下とし、給電部で、部分レールのうち集電子と電気的に接触している部分レールに対してのみ電源電力を供給する。 In order to achieve such an object, a crane power feeding system according to the present invention includes a crane device that operates by a power source supplied from the outside, and a feeding rail that is provided along a lane in which the crane device travels. A power supply unit that supplies power to the power supply rail, and a current collector that collects power supplied from the power supply unit by making electrical contact with the power supply rail on the crane device; A plurality of electric rails that are electrically insulated from each other are provided by covering a part of the power supply rail including the electric point as a protective section from above, thereby providing an electric shock protection unit that protects against electric shock to the power supply rail in the protective section. The rail length of the partial rail is equal to or less than the protection distance from the end point of the protection section to the current collecting point. Supplying the source power only to the part rails are in electrical contact.
　また、本発明にかかるクレーン給電方法は、外部から供給された電源電力により動作するクレーン装置と、このクレーン装置が走行するレーンに沿って条設された給電レールと、この給電レールに対して電源電力を供給する給電部とを備えるクレーン給電システムで用いられるクレーン給電方法であって、クレーン装置により、集電子を介して給電レールと電気的に接触することにより給電部から供給された電源電力を集電するステップと、クレーン装置により、当該集電点を含む給電レールの一部を保護区間としてその上方から覆うことにより、当該保護区間での給電レールに対する感電を保護するステップと、保護区間の端点から集電点までの保護距離以下のレール長を有し、互いに電気的に絶縁されて条設されることにより給電レールを構成する複数の部分レールのうち、集電子と電気的に接触している部分レールに対してのみ給電部から電源電力を供給するステップとを備えている。 The crane power supply method according to the present invention includes a crane device that operates with power supply supplied from the outside, a power supply rail provided along a lane in which the crane device travels, and a power supply for the power supply rail. A crane power supply method used in a crane power supply system including a power supply unit that supplies electric power, wherein the power supply supplied from the power supply unit by electrically contacting the power supply rail via a current collector is collected by a crane device. A step of collecting power, a step of protecting an electric shock to the power supply rail in the protection section by covering a part of the power supply rail including the current collection point as a protection section from above with a crane device; The rail length is equal to or less than the protection distance from the end point to the current collecting point. Among the plurality of partial rails constituting, and a step of supplying source power from the power supply unit only to the current collector in electrical contact with that part rail.
　本発明によれば、集電子と電気的に接触している部分レールは、すべてカバーにより覆うことができる。このため、給電中の部分レールは、カバーから露出することがなくなり、給電中の部分レールに対する感電を抑止することが可能となる。
　したがって、クレーン装置が走行するレーンに条設されている給電レールを、人、車両、装置などの任意の移動体が安全に横切って通過することができ、複雑な構成を用いることなる極めて安全な地上給電方式を提供することが可能となる。 According to the present invention, all the partial rails that are in electrical contact with the current collector can be covered with the cover. For this reason, the partial rail that is being fed is not exposed from the cover, and it is possible to suppress electric shock to the partial rail that is being fed.
Therefore, any moving body such as a person, a vehicle, or a device can safely cross the power supply rail provided in the lane where the crane device travels, and a complicated configuration is used. It is possible to provide a ground power supply method.
図１は、本発明の第１の実施の形態にかかるクレーン給電システムの説明図である。FIG. 1 is an explanatory diagram of a crane power feeding system according to a first embodiment of the present invention. 図２は、クレーン装置の構成を示す側面図である。FIG. 2 is a side view showing the configuration of the crane apparatus. 図３は、クレーン装置の構成を示す正面図である。FIG. 3 is a front view showing the configuration of the crane apparatus. 図４は、コンテナターミナルの構成例を示す平面図である。FIG. 4 is a plan view showing a configuration example of the container terminal. 図５は、給電レールの要部を示す平面図である。FIG. 5 is a plan view showing a main part of the power supply rail. 図６は、給電レールの要部を示す正面図である。FIG. 6 is a front view showing a main part of the power supply rail. 図７は、給電レールの要部を示す断面図である。FIG. 7 is a cross-sectional view showing the main part of the power supply rail. 図８は、切替器の構成を示すブロック図である。FIG. 8 is a block diagram showing the configuration of the switch. 図９は、本発明の第１の実施の形態にかかるクレーン給電システムの集電子と部分レールとの関係を示す説明図である。FIG. 9 is an explanatory diagram illustrating the relationship between the current collectors and the partial rails of the crane power feeding system according to the first embodiment of the present invention. 図１０は、本発明の第１の実施の形態にかかるクレーン給電システムの給電動作例を示す説明図である。FIG. 10 is an explanatory diagram illustrating an example of a power feeding operation of the crane power feeding system according to the first embodiment of the present invention. 図１１は、本発明の第１の実施の形態にかかるクレーン給電システムの他の給電動作を示す説明図である。FIG. 11 is an explanatory diagram illustrating another power feeding operation of the crane power feeding system according to the first embodiment of the present invention. 図１２は、本発明の第２の実施の形態にかかるクレーン給電システムの集電子と部分レールとの関係を示す説明図である。FIG. 12 is an explanatory diagram illustrating a relationship between the current collectors and the partial rails of the crane power feeding system according to the second embodiment of the present invention. 図１３は、本発明の第２の実施の形態にかかるクレーン給電システムの給電動作例を示す説明図である。FIG. 13 is an explanatory diagram illustrating an example of a power feeding operation of the crane power feeding system according to the second embodiment of the present invention.
　次に、本発明の実施の形態について図面を参照して説明する。
［第１の実施の形態］
　まず、図１を参照して、本発明の第１の実施の形態にかかるクレーン給電システムについて説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, a crane power feeding system according to a first embodiment of the present invention will be described with reference to FIG.
　このクレーン給電システムは、クレーン装置６に対して地上から電源供給を行う地上給電方式に基づく給電システムであり、主に、クレーン装置６、給電レール１、および給電部２から構成されている。 This crane power supply system is a power supply system based on a ground power supply system that supplies power to the crane device 6 from the ground, and mainly includes the crane device 6, the power supply rail 1, and the power supply unit 2.
　給電部２は、地上あるいは地下などのクレーン装置６の外部に設置されて、クレーン装置６の電源電力２５を供給する設備装置である。
　クレーン装置６は、集電子４を介して電源電力２５を集電するとともに、この電源電力２５に基づきレーンを走行して任意の位置で荷役を行う車両装置である。
　給電レール１は、クレーン装置６のレーンに沿って地上Ｇに条設され、クレーン装置６の集電子４と集電点Ｐで電気的に接触することにより、電源電力２５をクレーン装置６へ給電するレールである。 The power feeding unit 2 is a facility device that is installed outside the crane device 6 such as on the ground or underground and supplies power power 25 of the crane device 6.
The crane device 6 is a vehicle device that collects power supply power 25 via the current collector 4 and travels on a lane based on the power supply power 25 to perform cargo handling at an arbitrary position.
The power supply rail 1 is provided on the ground G along the lane of the crane device 6 and electrically contacts the current collector 4 of the crane device 6 at the current collection point P, thereby supplying power to the crane device 6. It is a rail.
　本実施の形態は、クレーン装置６に、集電点Ｐを含む給電レール１の一部を保護区間Ｓとしてその上方から覆うことにより、当該保護区間Ｓでの給電レール１に対する感電を保護（防止）するカバー３（感電保護部）を設け、給電レール１を、互いに電気的に絶縁された複数の部分レール１１の列から構成し、この部分レール１１のレール長Ｌを、保護区間Ｓの端点Ｅから集電点Ｐまでの保護距離Ｗ以下の長さとし、給電部２により、部分レール１１のうち集電子４と電気的に接触している部分レール１１に対してのみ電源電力２５を供給するようにしたものである。 In the present embodiment, the crane device 6 is covered (protected) from a part of the power supply rail 1 including the current collection point P as a protection section S from above, thereby protecting (preventing) electric shock on the power supply rail 1 in the protection section S. The cover 3 (electric shock protection portion) is provided, and the power supply rail 1 is constituted by a row of a plurality of partial rails 11 that are electrically insulated from each other. The rail length L of the partial rail 11 is defined as an end point of the protection section S. The power source 25 is supplied only to the partial rail 11 that is in electrical contact with the current collector 4 among the partial rails 11 by the power feeding unit 2 with a length equal to or shorter than the protective distance W from E to the current collecting point P. It is what I did.
［クレーン供給システム］
　次に、図１を参照して、本発明の第１の実施の形態にかかるクレーン給電システムについて詳細に説明する。
　クレーン装置６は、コンテナターミナル内でトレーラーに対するコンテナの積み降ろしを行う門型のトランスファークレーン装置などのクレーン装置である。 [Crane supply system]
Next, with reference to FIG. 1, the crane electric power feeding system concerning the 1st Embodiment of this invention is demonstrated in detail.
The crane device 6 is a crane device such as a gate-type transfer crane device that loads and unloads a container on a trailer in a container terminal.
　本実施の形態にかかるクレーン装置６には、例えばコンテナターミナルに設けられたレーンに沿って走行し、任意の位置で荷役を行うための電源電力２５を、地上に条設された給電レール１から集電する集電子４が設けられている。
　また、このクレーン装置６には、給電レール１と集電子４とが電気的に接触する集電点Ｐを含む給電レール１の一部を、保護区間Ｓとしてその上方から覆うことにより、当該保護区間Ｓでの給電レール１に対する感電を保護するカバー３が設けられている。 In the crane device 6 according to the present embodiment, for example, power supply power 25 for traveling along a lane provided in a container terminal and performing cargo handling at an arbitrary position is supplied from a power supply rail 1 provided on the ground. A current collector 4 for collecting current is provided.
Further, the crane device 6 includes a protection section S that covers a part of the power supply rail 1 including the current collection point P where the power supply rail 1 and the current collector 4 are in electrical contact with each other. A cover 3 for protecting the electric shock on the power supply rail 1 in the section S is provided.
　この際、保護区間Ｓの端点と集電点Ｐとの位置関係は固定化されており、保護区間Ｓはクレーン装置６の走行に応じて給電レール１上を移動する。なお、本実施の形態では、保護区間Ｓのすべてをカバー３で形成した場合を例として説明するが、クレーン装置６のうち給電レール１を覆う車体やタイヤなどの他の部品の一部または全部を兼用して保護区間Ｓを形成してもよく、これら部品を複数組み合わせて保護区間Ｓを形成してもよい。 At this time, the positional relationship between the end points of the protection section S and the current collecting point P is fixed, and the protection section S moves on the power supply rail 1 according to the traveling of the crane device 6. In the present embodiment, a case in which all of the protection section S is formed by the cover 3 will be described as an example. However, part or all of other parts such as a vehicle body and a tire covering the power supply rail 1 in the crane device 6. The protection section S may be formed by using both of them, or a plurality of these parts may be combined to form the protection section S.
　給電レール１は、クレーン装置６が走行するレーンに沿って条設され、クレーン装置６の集電子４と集電点Ｐで電気的に接触することにより、電源電力２５をクレーン装置６へ給電するレールである。
　この給電レール１は、互いに電気的に絶縁された複数の部分レール１１の列からなり、この部分レール１１は、保護区間Ｓの端点Ｅから集電点Ｐまでの保護距離Ｗ以下のレール長Ｌを有している。 The power supply rail 1 is provided along the lane in which the crane device 6 travels, and feeds the power source 25 to the crane device 6 by making electrical contact with the current collector 4 of the crane device 6 at the current collection point P. It is a rail.
The power supply rail 1 is composed of a row of a plurality of partial rails 11 that are electrically insulated from each other. The partial rail 11 has a rail length L equal to or less than a protection distance W from the end point E of the protection section S to the current collection point P. have.
　給電部２は、地下を含む地上に設置された設備装置であり、電源装置２１および切替部２２から構成されている。
　電源装置２１は、発電設備で発電された電力を所定の電圧に変換してクレーン装置６の電源電力２５を供給する機能を有している。クレーン装置６の電源電力２５としては、例えば直流電源、交流電源、３相交流電源などがある。 The power feeding unit 2 is a facility device installed on the ground including the underground, and includes a power supply device 21 and a switching unit 22.
The power supply device 21 has a function of converting power generated by the power generation facility into a predetermined voltage and supplying power power 25 of the crane device 6. Examples of the power source 25 for the crane device 6 include a DC power source, an AC power source, and a three-phase AC power source.
　切替部２２は、電源装置２１と個々の部分レール１１との間にそれぞれ接続された設けられた切替装置２３から構成されている。切替装置２３は、対応する部分レール１１に対するクレーン装置６の集電子４の電気的接触が検出されている期間にのみ、当該部分レール１１に対して電源電力２５を切替供給する機能を有している。
　したがって、給電部２からは、給電レール１のうち、クレーン装置６の集電子４と電気的に接触している部分レール１１に対してのみ電源電力２５が供給される。 The switching unit 22 includes a switching device 23 provided between the power supply device 21 and each partial rail 11. The switching device 23 has a function of switching and supplying the power supply 25 to the partial rail 11 only during a period when the electrical contact of the current collector 4 of the crane device 6 with respect to the corresponding partial rail 11 is detected. Yes.
Accordingly, the power supply unit 2 supplies the power supply power 25 only to the partial rail 11 that is in electrical contact with the current collector 4 of the crane device 6 in the power supply rail 1.
　この際、前述したように、部分レール１１のレール長Ｌは、保護区間Ｓの端点Ｅから集電点Ｐまでの保護距離Ｗ以下に制限されている。このため、部分レール１１の一端が集電子４と電気的に接触して、当該部分レール１１に電源電力２５が給電された場合でも、当該部分レール１１に対する感電する可能性がある区間は、集電点Ｐからレール長Ｌ分の区間となる。
　一方、クレーン装置６のカバー３により、当該集電点Ｐから保護距離Ｗの保護区間Ｓ内の給電レール１については、常に感電保護されている。したがって、給電レール１のうち、切替装置２３を介して電源電力２５が供給されている部分レール１１については、必ずカバー３により感電が保護されることになる。 At this time, as described above, the rail length L of the partial rail 11 is limited to the protection distance W from the end point E of the protection section S to the current collection point P or less. For this reason, even when one end of the partial rail 11 is in electrical contact with the current collector 4 and the power supply power 25 is supplied to the partial rail 11, the section where there is a possibility of electric shock with respect to the partial rail 11 is not collected. The section is from the electrical point P to the rail length L.
On the other hand, the cover 3 of the crane device 6 is always protected against electric shock for the power supply rail 1 in the protection section S at the protection distance W from the current collection point P. Accordingly, in the power supply rail 1, the electric shock is always protected by the cover 3 for the partial rail 11 to which the power supply power 25 is supplied via the switching device 23.
［クレーン装置］
　次に、図２および図３を参照して、本発明かかるクレーン給電システムが適用されるクレーン装置６の構成例について詳細に説明する。 [Crane equipment]
Next, with reference to FIG. 2 and FIG. 3, the structural example of the crane apparatus 6 to which the crane electric power feeding system concerning this invention is applied is demonstrated in detail.
　クレーン装置６は、全体として門型の枠体からなる架台６０から構成されている。この架台６０は、上部の梁６Ａ、この梁６Ａの両端を支える脚部６Ｂ、および脚部６Ｂを支える基台６Ｃから構成されている。基台６Ｃの下部には、台車６Ｄを介してタイヤ６Ｅが設けられている。タイヤ６Ｅは、この台車６Ｄにより走行方向をレーンに沿った順方向Ｘあるいはレーンに直交する直角方向Ｙへ変更自在に支持されている。
　また、脚部６Ｂに挟まれた基台６Ｃの上部には、集電子４で集電した電源電力を各部に供給する給電装置や蓄電装置、さらには集電子４とでき的に接触している部分レールに対して給電要求信号２４を出力する信号出力装置などの電気機器を収納する機器ユニット６Ｇが設けられている。 The crane apparatus 6 is composed of a gantry 60 composed of a portal frame as a whole. The gantry 60 includes an upper beam 6A, leg portions 6B that support both ends of the beam 6A, and a base 6C that supports the leg portions 6B. A tire 6E is provided below the base 6C via a carriage 6D. The tire 6E is supported by the carriage 6D so that the traveling direction can be freely changed to a forward direction X along the lane or a perpendicular direction Y orthogonal to the lane.
Further, an upper portion of the base 6C sandwiched between the leg portions 6B is in contact with a power supply device or a power storage device that supplies power to each unit with the power source collected by the current collector 4, and further to the current collector 4. A device unit 6G that houses an electrical device such as a signal output device that outputs a power supply request signal 24 to the partial rail is provided.
　架台６０の上部の梁６Ａには、トロリー６Ｈが設けられており、このトロリー６Ｈに載置された横行電動機６Ｌを駆動することにより、トロリー６Ｈが梁６Ａのレール上を直角方向Ｙへ走行する。また、トロリー６Ｈには、コンテナ９の上部を吊持するためのスプレッダー６Ｉがケーブル６Ｊを介して吊り下げられており、このトロリー６Ｈに載置された主巻電動機６Ｍを駆動してケーブル６Ｊの巻き上げ下げを行うことにより、スプレッダー６Ｉが昇降する。この他、トロリー６Ｈには、オペレータが搭乗する指令室６Ｋやコントローラなどの電気機器が設けられている。 A trolley 6H is provided on the beam 6A at the upper portion of the gantry 60, and the trolley 6H travels on the rail of the beam 6A in the right-angle direction Y by driving the traverse motor 6L mounted on the trolley 6H. . Further, a spreader 6I for suspending the upper portion of the container 9 is suspended from the trolley 6H via a cable 6J. The main winding motor 6M placed on the trolley 6H is driven to drive the cable 6J. By performing the winding up and down, the spreader 6I moves up and down. In addition, the trolley 6H is provided with electrical equipment such as a command room 6K on which an operator is boarded and a controller.
　カバー３は、基台６Ｃの外側下部であって、２つの台車６Ｄの間に、支持部材５およびアーム５Ａを介して地上Ｇの給電レール１と対向する位置に取り付けられて、集電点Ｐを含む給電レール１の一部区間をその上方から覆うことにより当該区間での感電を保護している。このカバー３に取り付けられている集電子４は、クレーン装置６の走行時であっても給電レール１上を走行あるいは摺動することにより、常に給電レール１と電気的に接触しており、この集電子４で集電された電源装置２１からの電源電力がクレーン装置６へ入力される。 The cover 3 is an outer lower portion of the base 6C, and is attached between the two carriages 6D at a position facing the power supply rail 1 on the ground G via the support member 5 and the arm 5A. By covering a partial section of the power supply rail 1 including from above, electric shock in the section is protected. The current collector 4 attached to the cover 3 is always in electrical contact with the power supply rail 1 by traveling or sliding on the power supply rail 1 even when the crane device 6 is traveling. Power supply power from the power supply device 21 collected by the current collector 4 is input to the crane device 6.
［コンテナターミナル］
　次に、図４を参照して、本実施の形態にかかるクレーン給電システムが用いられるコンテナターミナルについて説明する。
　コンテナターミナル７０は、港の埠頭７Ａに面して設けられており、埠頭７Ａに配置されたコンテナクレーン７Ｃにより、船舶７Ｂに対するコンテナ９の積み降ろしが行われる。 [Container Terminal]
Next, with reference to FIG. 4, the container terminal in which the crane electric power feeding system concerning this Embodiment is used is demonstrated.
The container terminal 70 is provided facing the port wharf 7A, and the container 9 is loaded and unloaded from the ship 7B by a container crane 7C disposed on the wharf 7A.
　コンテナターミナル７０には、コンテナ９の長手方向すなわち順方向Ｘに沿って伸延する長方形のエリアからなるレーン７１が複数設けられており、レーン７１内を順方向Ｘにクレーン装置６が走行することにより、レーン７１内に載置されているコンテナ９が効率よく仕分けされる。
　コンテナターミナル７０には、道路７２側にゲート７３が設けられており、トレーラー９１はこのゲート７３を通過してコンテナ９の搬入・搬出や、コンテナターミナル７０内の他の場所へのコンテナ９の運搬を行う。 The container terminal 70 is provided with a plurality of lanes 71 each having a rectangular area extending along the longitudinal direction of the container 9, that is, the forward direction X. The crane device 6 travels in the forward direction X in the lane 71. The containers 9 placed in the lane 71 are sorted efficiently.
The container terminal 70 is provided with a gate 73 on the road 72 side, and the trailer 91 passes through the gate 73 to carry in / out the container 9 and transport the container 9 to other locations in the container terminal 70. I do.
　レーン７１には、トレーラー９１の通路が設けられており、この通路に停車したトレーラー９１に対して、クレーン装置６によるコンテナ９の積み降ろしが行われる。
　各レーン７１には、例えばそのレーン７１端部の地上または地下に、クレーン給電システムの電源装置２１が配置されており、レーン７１の側端部には順方向Ｘに沿って給電レール１が条設されている。クレーン装置６には、この給電レール１と電気的に接触する集電子４を介して、電源装置２１から電源電力が供給される。 The lane 71 is provided with a passage for the trailer 91, and the container 9 is loaded and unloaded by the crane device 6 on the trailer 91 stopped in this passage.
In each lane 71, for example, the power supply device 21 of the crane power feeding system is arranged on the ground or underground at the end of the lane 71, and the power feeding rail 1 extends along the forward direction X at the side end of the lane 71. It is installed. The crane apparatus 6 is supplied with power from a power supply device 21 via a current collector 4 that is in electrical contact with the power supply rail 1.
　この際、給電レール１のうち集電子と電気的に接触している部分レール１１に対してのみ電源電力が供給され、他の部分レール１１には給電されないため、感電の危険はない。また、各部分レール１１は、そのレール長Ｌが、保護区間Ｓの端点Ｅから集電子４による集電点Ｐまでの保護距離Ｗ以下の長さとなっている。このため、給電されている部分レール１１は、カバー３により完全に感電保護されて、感電の危険はない。 At this time, the power supply power is supplied only to the partial rails 11 that are in electrical contact with the current collector of the power supply rail 1 and is not supplied to the other partial rails 11, so there is no risk of electric shock. In addition, each partial rail 11 has a rail length L that is equal to or shorter than the protection distance W from the end point E of the protection section S to the current collection point P by the current collector 4. For this reason, the supplied partial rail 11 is completely protected from electric shock by the cover 3, and there is no risk of electric shock.
［給電レール］
　次に、図５～図７を参照して、本発明の第１の実施の形態にかかるクレーン給電システムの給電レールについて詳細に説明する。 [Power supply rail]
Next, the power supply rail of the crane power supply system according to the first embodiment of the present invention will be described in detail with reference to FIGS.
　給電レール１は、地上Ｇに形成された溝１２内に並行して条設された２条の給電レール１Ａ，１Ｂから構成されている。これら給電レール１Ａ，１Ｂは、互いに電気的に絶縁された複数の部分レール１１Ａ，１１Ｂの列から構成されている。これら部分レール１１Ａ，１１Ｂは、保護区間Ｓの端点Ｅから集電点Ｐまでの保護距離Ｗ以下のレール長Ｌを有していればよく、これら部分レールのすべてが等しいレール長Ｌである必要はない。絶縁部１３については、樹脂などの一般的な絶縁体を用いてもよく、隣接する部分レール間に設けた空間を絶縁体として用いてもよい。この２条の給電レール１Ａ，１Ｂを介して、電源装置２１から直流電源、あるいは交流電源が供給される。 The power supply rail 1 is composed of two power supply rails 1A and 1B provided in parallel in a groove 12 formed on the ground G. These power supply rails 1A and 1B are composed of a row of a plurality of partial rails 11A and 11B that are electrically insulated from each other. These partial rails 11A and 11B only have to have a rail length L that is equal to or less than the protection distance W from the end point E of the protection section S to the current collecting point P, and all of these partial rails need to have the same rail length L. There is no. As for the insulating portion 13, a general insulator such as resin may be used, and a space provided between adjacent partial rails may be used as the insulator. A DC power supply or an AC power supply is supplied from the power supply device 21 through the two supply rails 1A and 1B.
　クレーン装置６のカバー３は、給電レール１と対向する底部が開口した箱状の本体３Ａからなり、集電点Ｐを含む給電レール１の一部区間をその上方から覆うことにより当該区間での感電を保護する機能を有している。
　本体３Ａについては、作業員の感電を防止しうる部材で構成すればよく、板状部材、さらには通気孔を有する板状部材を用いればよい。あるいは、網状部材や棒状部材の組合せを用いて、カゴ体あるいは枠体で本体３Ａを構成してもよい。 The cover 3 of the crane device 6 is composed of a box-shaped main body 3A having an opening at the bottom facing the power supply rail 1, and covers a part of the power supply rail 1 including the current collection point P from above by covering the section 3A. Has a function to protect against electric shock.
The main body 3A may be made of a member that can prevent an electric shock of an operator, and may be a plate-like member or a plate-like member having a vent hole. Or you may comprise 3 A of main bodies with a cage | basket body or a frame body using the combination of a net-like member or a rod-shaped member.
　集電子４Ａ，４Ｂは、カバー３の内室に車軸４Ｘを介して回動自在に支持された車輪からなり、給電レール１Ａ，１Ｂ上を転動することにより、給電レール１Ａ，１Ｂと電気的に接触して、給電レール１Ａ，１Ｂから電源電力２５を集電する機能を有している。
　これら集電子４Ａ，４Ｂは、カバー３のうち、給電レール１Ａ，１Ｂと接触する集電点Ｐと保護区間Ｓの端点Ｅとの保護距離Ｗが、給電レール１Ａ，１Ｂを構成する部分レール１１Ａ，１１Ｂのレール長Ｌより長い距離となる位置に支持されている。 The current collectors 4A and 4B are wheels that are rotatably supported in the inner chamber of the cover 3 via the axle 4X, and are electrically connected to the power supply rails 1A and 1B by rolling on the power supply rails 1A and 1B. The power supply power 25 is collected from the power supply rails 1A and 1B.
The current collectors 4A and 4B have a partial rail 11A in which the protection distance W between the current collection point P in contact with the power supply rails 1A and 1B and the end point E of the protection section S of the cover 3 constitutes the power supply rails 1A and 1B. , 11B is supported at a position that is longer than the rail length L.
　アーム５Ａは、その一端が支持部材５の端部に回動自在に取り付けられており、他端が本体３Ａの上部に回動自在に取り付けられている。油圧シリンダ５Ｂは、その一端が支持部材５の側部に回動自在に取り付けられており、他端がアーム５Ａの中程に回動自在に取り付けられている。 One end of the arm 5A is rotatably attached to the end of the support member 5, and the other end is rotatably attached to the upper part of the main body 3A. One end of the hydraulic cylinder 5B is rotatably attached to the side portion of the support member 5, and the other end is rotatably attached to the middle of the arm 5A.
　この際、クレーン装置６の通常走行時には、油圧回路（図示せず）を制御して、例えば油圧シリンダ５Ｂのロッド側とヘッド側の作動油をリザーバータンク（図示せず）などを介して連通させることにより、アーム５Ａが支持部材５を支点として上下自在に回動する状態とする。これにより、カバー３が自重で降下して、カバー３の集電子４が地上Ｇの給電レール１と電気的に接触することになる。したがって、クレーン装置６の上下動がカバー３に伝わらなくなるため、地上Ｇの起伏やクレーン装置６の揺れが発生しても、給電レール１上を集電子４が滑らかに走行または摺動することができる。 At this time, during normal traveling of the crane device 6, a hydraulic circuit (not shown) is controlled so that, for example, hydraulic oil on the rod side and the head side of the hydraulic cylinder 5B is communicated via a reservoir tank (not shown). As a result, the arm 5 </ b> A is brought into a state in which the arm 5 </ b> A can freely rotate up and down with the support member 5 as a fulcrum. As a result, the cover 3 is lowered by its own weight, and the current collector 4 of the cover 3 comes into electrical contact with the power supply rail 1 on the ground G. Accordingly, since the vertical movement of the crane device 6 is not transmitted to the cover 3, the current collector 4 can smoothly run or slide on the power supply rail 1 even when the ground G undulates or the crane device 6 shakes. it can.
　また、メンテナンス時には、油圧回路（図示せず）を制御して、例えば油圧シリンダ５Ｂのロッド側へオイルポンプ（図示せず）から作動油を供給するとともに、ヘッド側の作動油をリザーバータンクへ戻してアーム５Ａを引き上げることにより、カバー３を地上Ｇから持ち上げればよい。 During maintenance, a hydraulic circuit (not shown) is controlled to supply hydraulic oil from an oil pump (not shown) to the rod side of the hydraulic cylinder 5B, for example, and the head side hydraulic oil is returned to the reservoir tank. The cover 3 may be lifted from the ground G by lifting the arm 5A.
　なお、通常走行時、油圧シリンダ５Ｂの内圧をある程度高めることにより、アーム５Ａを介してカバー３を地上Ｇに押圧させてもよい。この際、所定以上の押圧がカバー３に加わらないように、油圧シリンダ５Ｂのリリーフ弁により、油圧シリンダ５Ｂの内圧上限を調整すればよい。これにより、集電効率を改善することが可能となる。 Note that during normal travel, the cover 3 may be pressed against the ground G via the arm 5A by increasing the internal pressure of the hydraulic cylinder 5B to some extent. At this time, the upper limit of the internal pressure of the hydraulic cylinder 5B may be adjusted by the relief valve of the hydraulic cylinder 5B so that a predetermined pressure or more is not applied to the cover 3. Thereby, it is possible to improve current collection efficiency.
［切替装置］
　次に、図８を参照して、本実施の形態にかかるクレーン給電システムの切替器について詳細に説明する。
　給電レール１を構成する部分レール１１には、個々の部分レール１１に対する電源装置２１からの電源電力の供給を制御する切替装置２３が設けられている。
　この切替装置２３には、主な機能部として、検出器２３Ａと切替器２３Ｂとが設けられている。 [Switching device]
Next, with reference to FIG. 8, the switch of the crane electric power feeding system concerning this Embodiment is demonstrated in detail.
The partial rail 11 constituting the power supply rail 1 is provided with a switching device 23 for controlling the supply of power from the power supply device 21 to each partial rail 11.
The switching device 23 is provided with a detector 23A and a switch 23B as main functional units.
　検出器２３Ａは、信号検出回路などの専用の回路部からなり、部分レール１１を介してクレーン装置６から出力される給電要求信号２４の有無を検出出力する機能を有している。例えば、クレーン装置６の電源部（図示せず）から集電子４を介して給電要求信号２４を常時出力しておけば、集電子４と電気的に接触した部分レール１１に対してのみ、自動的に給電要求信号２４が出力されることになる。給電要求信号２４として所定周波数の高周波信号を用いる場合、信号検出部２３Ａに当該周波数信号成分を選別するフィルタ回路を設けておけば、クレーン装置６から部分レール１１に出力された給電要求信号２４を検出できる。 The detector 23A includes a dedicated circuit unit such as a signal detection circuit, and has a function of detecting and outputting the presence / absence of a power supply request signal 24 output from the crane device 6 via the partial rail 11. For example, if the power supply request signal 24 is always output from the power supply unit (not shown) of the crane device 6 via the current collector 4, only the partial rail 11 in electrical contact with the current collector 4 is automatically Therefore, the power supply request signal 24 is output. When a high-frequency signal having a predetermined frequency is used as the power supply request signal 24, the power supply request signal 24 output to the partial rail 11 from the crane device 6 can be obtained by providing a filter circuit for selecting the frequency signal component in the signal detection unit 23A. It can be detected.
　切替器２３Ｂは、リレー回路などの専用の回路部からなり、検出器２３Ａからの給電要求信号２４の検出有無を示す検出出力に基づいて、対応する部分レール１１に対して電源装置２１からの電源電力２５を切替供給する機能を有している。これにより、検出器２３Ａで給電要求信号２４が検出された期間だけ、その検出出力に基づいて電源電力２５が部分レール１１へ供給され、検出器２３Ａで給電要求信号２４が検出されなくなった場合には、その検出出力に基づいて部分レール１１に対する電源電力２５の供給が停止する。 The switch 23B is composed of a dedicated circuit unit such as a relay circuit, and based on a detection output indicating whether or not the power supply request signal 24 is detected from the detector 23A, the power supply from the power supply device 21 to the corresponding partial rail 11 is provided. It has a function of supplying power 25 by switching. Thereby, only when the power supply request signal 24 is detected by the detector 23A, the power supply power 25 is supplied to the partial rail 11 based on the detection output, and the power supply request signal 24 is not detected by the detector 23A. The supply of the power supply 25 to the partial rail 11 is stopped based on the detection output.
　切替装置２３については、部分レール１１の近傍に配置すれば、切替装置２３と部分レール１１とを接続する配線ケーブルの長さを短縮できる。また、電源装置２１からの配線ケーブルを給電レール１に沿って配線し、この配線ケーブルを分岐して各切替装置２３へ接続し、あるいは各切替装置２３でこの配線ケーブルを中継接続することにより、電源装置２１から個々の切替装置２３へ電源電力を供給することができる。したがって、電源装置２１と各切替装置２３とを接続する配線の長さを短縮できるとともに、その配線作業負担を大幅に削減することができる。 If the switching device 23 is disposed in the vicinity of the partial rail 11, the length of the wiring cable connecting the switching device 23 and the partial rail 11 can be shortened. Further, by routing the wiring cable from the power supply device 21 along the power supply rail 1 and branching the wiring cable to connect to each switching device 23, or by connecting the wiring cable by each switching device 23, Power supply power can be supplied from the power supply device 21 to each switching device 23. Therefore, the length of the wiring connecting the power supply device 21 and each switching device 23 can be shortened, and the wiring work burden can be greatly reduced.
［クレーン給電システムの動作］
　次に、図９～図１１を参照して、本発明の第１の実施の形態にかかるクレーン給電システムの動作について説明する。 [Operation of crane power supply system]
Next, the operation of the crane power feeding system according to the first embodiment of the present invention will be described with reference to FIGS.
　図９には、カバー３に２つの集電子４１，４２を設けた例が記載されている。集電子４１，４２の位置、すなわち集電点Ｐは、保護区間Ｓの端点Ｅから保護距離Ｗだけ離れている。この際、部分レール１１Ｘ，１１Ｙ，１１Ｚのレール長Ｌは、保護距離Ｗ以下となっている。以下では、２つの集電子４１，４２間の距離がレール長Ｌより短い場合を例として説明する。 FIG. 9 shows an example in which the cover 3 is provided with two current collectors 41 and 42. The positions of the current collectors 41, 42, that is, the current collecting point P are separated from the end point E of the protection section S by the protection distance W. At this time, the rail length L of the partial rails 11X, 11Y, and 11Z is equal to or less than the protection distance W. Hereinafter, a case where the distance between the two current collectors 41 and 42 is shorter than the rail length L will be described as an example.
　カバー３が給電レール１上をＸ方向に移動して部分レール１１Ｘへ進入してきた場合、集電子４１は、時刻Ｔ１に初めて部分レール１１Ｘと電気的に接触し、時刻Ｔ３に部分レール１１Ｘから部分レール１１Ｙへ移動し、時刻Ｔ５に部分レール１１Ｙから部分レール１１Ｚへ移動し、時刻Ｔ７に部分レール１１Ｚから離れる。
　同様に、集電子４２は、時刻Ｔ２に初めて部分レール１１Ｘと電気的に接触し、時刻Ｔ４に部分レール１１Ｘから部分レール１１Ｙへ移動し、時刻Ｔ６に部分レール１１Ｙから部分レール１１Ｚへ移動し、時刻Ｔ８に部分レール１１Ｚから離れる。この際、集電子４１，４２の時刻差は、集電子４１，４２の移動速度と集電子４１，４２間の距離で決定される。 When the cover 3 moves in the X direction on the power supply rail 1 and enters the partial rail 11X, the current collector 41 is in electrical contact with the partial rail 11X for the first time at time T1, and the partial current from the partial rail 11X at time T3. It moves to the rail 11Y, moves from the partial rail 11Y to the partial rail 11Z at time T5, and leaves the partial rail 11Z at time T7.
Similarly, the current collector 42 is in electrical contact with the partial rail 11X for the first time at time T2, moves from the partial rail 11X to the partial rail 11Y at time T4, and moves from the partial rail 11Y to the partial rail 11Z at time T6. It leaves | separates from the partial rail 11Z at the time T8. At this time, the time difference between the current collectors 41 and 42 is determined by the moving speed of the current collectors 41 and 42 and the distance between the current collectors 41 and 42.
　一方、このような集電子４１，４２の移動に伴って、部分レール１１Ｘには、時刻Ｔ１から時刻Ｔ４までの期間だけ給電され、部分レール１１Ｙには、時刻Ｔ３から時刻Ｔ６までの期間だけ給電され、部分レール１１Ｚには、時刻Ｔ５から時刻Ｔ８までの期間だけ給電される。
　この際、部分レール１１１Ｘ，１１Ｙ，１１Ｚにおいて、感電の可能性があるタイミングとしては、集電子４１がこれら部分レールと最初に接触した時点、および集電子４２がそれまで接触していた部分レールから離脱する時点があげられる。 On the other hand, with the movement of the current collectors 41 and 42, power is supplied to the partial rail 11X only during the period from time T1 to time T4, and power is supplied to the partial rail 11Y only during the period from time T3 to time T6. Thus, power is supplied to the partial rail 11Z only during the period from time T5 to time T8.
At this time, in the partial rails 111X, 11Y, and 11Z, there is a possibility of electric shock as the timing when the current collector 41 first contacts with these partial rails and from the partial rail with which the current collector 42 has been in contact so far. The time to leave is given.
　集電子４１については、時刻Ｔ１，Ｔ３，Ｔ５に、それぞれ部分レール１１Ｘ，１１Ｙ，１１Ｚと最初に接触しているが、これら部分レールのレール長Ｌは集電点Ｐから保護区間Ｓの端点Ｅまでの保護距離Ｗ以下である。このため、時刻Ｔ１，Ｔ３，Ｔ５において、集電子４１が部分レールの一端に最初に接触した時点では、その部分レールの他端はすでにカバー３の下に隠れていることになる。
　同様に、集電子４２については、時刻Ｔ４，Ｔ６，Ｔ８に、それぞれ部分レール１１Ｘ，１１Ｙ，１１Ｚから離脱しているが、これら部分レールのレール長Ｌは集電点Ｐから保護区間Ｓの端点Ｅまでの保護距離Ｗ以下である。このため、時刻Ｔ４，Ｔ６，Ｔ８において、集電子４２が部分レールの一端から離脱した時点では、その部分レールの他端はまだカバー３の下に隠れていることになる。 The current collector 41 is initially in contact with the partial rails 11X, 11Y, and 11Z at times T1, T3, and T5, respectively. The rail length L of these partial rails varies from the current collection point P to the end point E of the protection section S. Or less than the protection distance W. For this reason, at time T1, T3, T5, when the current collector 41 first contacts one end of the partial rail, the other end of the partial rail is already hidden under the cover 3.
Similarly, the current collector 42 is detached from the partial rails 11X, 11Y, and 11Z at times T4, T6, and T8, respectively. The rail length L of these partial rails is the end point of the protection section S from the current collection point P. Less than or equal to the protection distance W to E. Therefore, at time T4, T6, T8, when the current collector 42 is detached from one end of the partial rail, the other end of the partial rail is still hidden under the cover 3.
　したがって、部分レール１１Ｘ，１１Ｙ，１１Ｚに対する給電開始および給電停止は、それぞれの部分レール１１Ｘ，１１Ｙ，１１Ｚがカバー３の下に隠れている状態で行われることになる。このため、給電されている部分レールは、常にカバー３の下に隠れていることになり、給電されている部分レールによるカバー３により感電は抑止される。 Therefore, power supply start and power supply stop for the partial rails 11X, 11Y, and 11Z are performed in a state where the partial rails 11X, 11Y, and 11Z are hidden under the cover 3. For this reason, the supplied partial rail is always hidden under the cover 3, and the electric shock is suppressed by the cover 3 by the supplied partial rail.
　図１０は、２つの集電点Ｐ間の距離は、レール長Ｌより短い場合を示しており、２つの集電点Ｐ間に部分レールが入り込まないケースとなるが、２つの集電点Ｐ間の距離が、部分レールのレール長Ｌより長い場合には、これら２つの集電点Ｐ間に部分レールが入り込む状態が存在するため、図１１のような給電動作となる。
　この場合、例えば時刻Ｔ２から時刻Ｔ３の間に、集電子４１，４２間すなわち集電点Ｐ間に部分レール１１Ｘが入り込んでおり、この期間において、部分レール１１Ｘに対する給電が一旦停止されて再開される。しかし、これら給電停止および再開は、すべてカバー３の下に隠れた状態で行われるため、感電の可能性はない。 FIG. 10 shows a case where the distance between the two current collecting points P is shorter than the rail length L. In this case, the partial rail does not enter between the two current collecting points P. When the distance between them is longer than the rail length L of the partial rail, there is a state in which the partial rail enters between these two current collection points P, and thus the power feeding operation as shown in FIG.
In this case, for example, between time T2 and time T3, the partial rail 11X enters between the current collectors 41 and 42, that is, between the current collecting points P. During this period, power supply to the partial rail 11X is temporarily stopped and restarted. The However, since these power supply stops and restarts are all performed in a state of being hidden under the cover 3, there is no possibility of electric shock.
　なお、本実施の形態では、図９に示したように、２つの集電子４１，４２を用いた場合を例として説明したが、３つ以上の集電子を用いることにより、集電効率やカバー３の安定性を向上させることができる。この場合、部分レールのレール長Ｌは、集電子のうち保護区間Ｓの端点Ｅに最も近い集電子の集電点Ｐと端点Ｅとの保護距離Ｗ以下とすればよい。 In the present embodiment, as shown in FIG. 9, the case where two current collectors 41 and 42 are used has been described as an example. 3 stability can be improved. In this case, the rail length L of the partial rail may be equal to or less than the protection distance W between the current collecting point P and the end point E of the current collector that is closest to the end point E of the protection section S among the current collectors.
［第１の実施の形態の効果］
　このように、本実施の形態は、クレーン装置に、給電レールと電気的に接触することにより給電部から供給された電源電力を集電する集電子と、当該集電点Ｐを含む給電レールの一部を保護区間Ｓとしてその上方から覆うことにより、当該保護区間Ｓでの給電レールに対する感電を保護するカバー（感電保護部）を設け、給電レールを、互いに電気的に絶縁された複数の部分レールの列から構成し、この部分レールのレール長Ｌを、保護区間Ｓの端点Ｅから集電点Ｐまでの保護距離Ｗ以下の長さとし、給電部により、部分レールのうち集電子と電気的に接触している部分レールに対してのみ電源電力２５を供給するようにしたので、集電子と電気的に接触している部分レールは、すべてカバーにより覆うことができる。 [Effect of the first embodiment]
As described above, the present embodiment is configured such that a current collector that collects the power supplied from the power feeding unit by making electrical contact with the power feeding rail is connected to the crane device, and a power feeding rail including the current collecting point P. By covering a part as a protection section S from above, a cover (electric shock protection portion) is provided to protect against electric shock to the power supply rail in the protection section S, and the power supply rail is electrically insulated from each other. It consists of a row of rails, and the rail length L of this partial rail is set to a length equal to or shorter than the protective distance W from the end point E of the protection section S to the current collecting point P. Since the power supply power 25 is supplied only to the partial rails that are in contact with each other, all the partial rails that are in electrical contact with the current collector can be covered with the cover.
　このため、給電中の部分レールは、カバーから露出することがなくなり、給電中の部分レールに対する感電を抑止することが可能となる。
　したがって、クレーン装置が走行するレーンに条設されている給電レールを、人、車両、装置などの任意の移動体が安全に横切って通過することができ、複雑な構成を用いることなる極めて安全な地上給電方式を提供することが可能となる。 For this reason, the partial rail that is being fed is not exposed from the cover, and it is possible to suppress electric shock to the partial rail that is being fed.
Therefore, any moving body such as a person, a vehicle, or a device can safely cross the power supply rail provided in the lane where the crane device travels, and a complicated configuration is used. It is possible to provide a ground power supply method.
　また、本実施の形態では、給電部を、部分レールから得られた電気信号に基づいて当該部分レールと集電子との電気的接触を検出する検出器と、この検出器の検出出力に基づいて対応する部分レールに対して電源電力を切替供給する切替器とから構成したので、簡素な構成で、任意の部分レールに対して電源電力を切替供給することが可能となる。
　さらに、クレーン装置から、集電子が電気的に接触している部分レールに対して電気信号を出力するようにしたので、極めて容易にかつ正確に部分レールと集電子との電気的接触を検出することができる。 In the present embodiment, the power feeding unit is based on an electrical signal obtained from the partial rail, a detector that detects electrical contact between the partial rail and the current collector, and a detection output of the detector. Since the switch is configured to switch and supply power to the corresponding partial rail, the power can be switched and supplied to any partial rail with a simple configuration.
Furthermore, since an electrical signal is output from the crane device to the partial rail with which the current collector is in electrical contact, the electrical contact between the partial rail and the current collector can be detected very easily and accurately. be able to.
　また、本実施の形態では、給電レールをその全長にわたり部分レールの列で構成する場合を例として説明したが、クレーン装置のレーンのうち任意の移動体が進入する区間においてのみ、部分レールの列から給電レールを構成してもよい。これにより、部分レールや切替器の数を抑えることができ、クレーン給電システムの設備規模および設備コストを削減することが可能となる。 Further, in the present embodiment, the case where the power supply rail is configured by a row of partial rails has been described as an example, but the row of partial rails is provided only in a section where an arbitrary moving body enters the lane of the crane device. The power supply rail may be configured from the above. Thereby, the number of partial rails and switches can be suppressed, and the equipment scale and equipment cost of the crane power feeding system can be reduced.
　また、本実施の形態では、集電子として、クレーン装置のカバーに回動自在に支持されて給電レール上を転動するとともに、当該給電レールとの物理的接触点を集電点として当該給電レールから電源電力を集電する車輪を用いるようにしたので、給電レールからの電源電力を集電する機能と給電レール上方にカバーを支持する機能との両方を実現することが可能となり、クレーン装置、さらにはクレーン給電システムの構成を簡素化することができる。 Further, in the present embodiment, as the current collector, the power supply rail is supported by the cover of the crane device so as to be rotatable and rolls on the power supply rail, and the physical contact point with the power supply rail serves as a current collection point. Since the wheel for collecting power from the power supply is used, it is possible to realize both the function of collecting power from the power supply rail and the function of supporting the cover above the power supply rail. Furthermore, the configuration of the crane power feeding system can be simplified.
［第２の実施の形態］
　次に、図１２を参照して、本発明の第２の実施の形態について説明する。
　第１の実施の形態では、カバー３に設けた集電子４でカバー３を給電レール１上に支持する車輪を兼用した場合について説明した。本実施の形態では、集電子４と車輪とを別個に設けた場合を例として説明する。 [Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
In the first embodiment, a case has been described in which the current collector 4 provided on the cover 3 also serves as a wheel that supports the cover 3 on the power supply rail 1. In the present embodiment, a case where the current collector 4 and the wheel are provided separately will be described as an example.
　本実施の形態では、図１２に示すように、保護区間Ｓの両端点Ｅの中央に集電子４３が設けられており、この集電子４３と両端点Ｅとの間に、それぞれクレーン装置６とは絶縁された車輪４４が２つ設けられている。これら車輪４４は、前述した図７の集電子４Ａ，４Ｂと同様、給電レール１Ａ，１Ｂ上を転動する車輪からなり、本体３Ａの内室に車軸を介して回動自在に支持されている。車輪４４の絶縁構造としては、絶縁性の車軸や軸受けを用いるなど、一般的な公知の技術を用いればよい。 In the present embodiment, as shown in FIG. 12, a current collector 43 is provided in the center of both end points E of the protection section S. Between the current collector 43 and both end points E, the crane device 6 and Is provided with two insulated wheels 44. Like the current collectors 4A and 4B of FIG. 7 described above, these wheels 44 are wheels that roll on the power supply rails 1A and 1B, and are rotatably supported in the inner chamber of the main body 3A via an axle. . As the insulating structure of the wheel 44, a generally known technique such as an insulating axle or bearing may be used.
　一方、集電子４３は、前述した図７の集電子４Ａ，４Ｂと同様に車輪を用いてもよいが、カバー３の自重は車輪４４で支えられるため、集電子４３でカバー３の自重を支える必要はない。このため、給電レール１と摺動するよう押圧される摺動子を用いてもよい。
　集電子４３の位置、すなわち集電点Ｐは、カバー３の両端点Ｅからそれぞれ保護距離Ｗだけ離れている。この際、部分レール１１Ｘ，１１Ｙのレール長Ｌは、保護距離Ｗ以下となっている。
　なお、本実施の形態におけるクレーン給電システムの他の構成については、第１の実施の形態と同様であり、ここでの詳細な説明は省略する。 On the other hand, the current collector 43 may use wheels in the same manner as the current collectors 4A and 4B of FIG. 7 described above, but the weight of the cover 3 is supported by the wheel 44, and therefore the current collector 43 supports the weight of the cover 3 by the current collector 43. There is no need. For this reason, you may use the slider pressed so that it may slide with the electric power feeding rail 1. FIG.
The position of the current collector 43, that is, the current collecting point P is separated from the both end points E of the cover 3 by a protection distance W. At this time, the rail length L of the partial rails 11X and 11Y is equal to or less than the protection distance W.
In addition, about the other structure of the crane electric power feeding system in this Embodiment, it is the same as that of 1st Embodiment, and detailed description here is abbreviate | omitted.
［第２の実施の形態の動作］
　次に、図１３を参照して、本発明の第２の実施の形態にかかるクレーン給電システムの給電動作について説明する。 [Operation of Second Embodiment]
Next, with reference to FIG. 13, the power feeding operation of the crane power feeding system according to the second embodiment of the present invention will be described.
　カバー３が給電レール１上をＸ方向に移動して部分レール１１Ｘへ進入してきた場合、集電子４３は、時刻Ｔ１に初めて部分レール１１Ｘと電気的に接触し、時刻Ｔ２に部分レール１１Ｘから部分レール１１Ｙへ移動し、時刻Ｔ３に部分レール１１Ｙから部分レール１１Ｚへ移動し、時刻Ｔ７に部分レールＹから離れる。
　このような集電子４３の移動に伴って、部分レール１１Ｘには、時刻Ｔ１から時刻Ｔ２までの期間だけ給電され、部分レール１１Ｙには、時刻Ｔ２から時刻Ｔ３までの期間だけ給電される。 When the cover 3 moves in the X direction on the power supply rail 1 and enters the partial rail 11X, the current collector 43 is in electrical contact with the partial rail 11X for the first time at time T1, and the partial current from the partial rail 11X at time T2. Move to the rail 11Y, move from the partial rail 11Y to the partial rail 11Z at time T3, and leave the partial rail Y at time T7.
With such movement of the current collector 43, power is supplied to the partial rail 11X only during the period from time T1 to time T2, and power is supplied to the partial rail 11Y only during the period from time T2 to time T3.
　この際、部分レール１１１Ｘ，１１Ｙ，１１Ｚにおいて、感電の可能性があるタイミングとしては、集電子４３がこれら部分レールと最初に接触した時点、およびそれまで接触していた部分レールから離脱する時点があげられる。
　集電子４３は、時刻Ｔ１，Ｔ２に、それぞれ部分レール１１Ｘ，１１Ｙと最初に接触しているが、これら部分レールのレール長Ｌはカバー３の集電点Ｐから端点Ｅまでの保護距離Ｗ以下である。このため、時刻Ｔ１，Ｔ２において、集電子４３が部分レールの一端に最初に接触した時点では、その部分レールの他端はすでにカバー３の下に隠れていることになる。 At this time, in the partial rails 111X, 11Y, and 11Z, the timing when there is a possibility of electric shock includes the time when the current collector 43 first contacts with these partial rails and the time when the current collector 43 leaves the partial rail that has been in contact so far. can give.
The current collector 43 is initially in contact with the partial rails 11X and 11Y at times T1 and T2, respectively. The rail length L of these partial rails is equal to or less than the protective distance W from the current collection point P to the end point E of the cover 3. It is. For this reason, at time T1, T2, when the current collector 43 first contacts one end of the partial rail, the other end of the partial rail is already hidden under the cover 3.
　一方、集電子４３は、時刻Ｔ２，Ｔ３に、それぞれ部分レール１１Ｘ，１１Ｙから離脱しているが、これら部分レールのレール長Ｌはカバー３の集電点Ｐから端点Ｅまでの保護距離Ｗ以下である。このため、時刻Ｔ２，Ｔ３において、集電子４３が部分レールの一端から離脱した時点では、その部分レールの他端はまだカバー３の下に隠れていることになる。
　したがって、部分レール１１Ｘ，１１Ｙに対する給電開始および給電停止は、それぞれの部分レール１１Ｘ，１１Ｙがカバー３の下に隠れている状態で行われることになる。このため、給電されている部分レールは、常にカバー３の下に隠れていることになり、給電されている部分レールによるカバー３により感電は抑止される。 On the other hand, the current collector 43 is detached from the partial rails 11X and 11Y at times T2 and T3, respectively, but the rail length L of these partial rails is equal to or less than the protective distance W from the current collection point P to the end point E of the cover 3. It is. For this reason, at time T2 and T3, when the current collector 43 is detached from one end of the partial rail, the other end of the partial rail is still hidden under the cover 3.
Accordingly, the power supply start and power supply stop for the partial rails 11X and 11Y are performed in a state where the partial rails 11X and 11Y are hidden under the cover 3. For this reason, the supplied partial rail is always hidden under the cover 3, and the electric shock is suppressed by the cover 3 by the supplied partial rail.
［第２の実施の形態の効果］
　このように、本実施の形態は、クレーン装置の集電子は、保護区間Ｓの中間部に集電点Ｐを有し、クレーン装置のカバーで、集電点Ｐと保護区間Ｓの端点Ｅとの間に、給電レール上を転動する車輪を回動自在に支持するようにしたので、集電点をカバーの中央付近に配置した場合でも、カバーを給電レール上方に安定して支持することができる。
　このため、部分レールのレール長を保護区間Ｓの１／２に近づけることができ、部分レールおよび部分レールごとに設けられた切替器の数を最小限に抑えることができ、クレーン給電システムの設備規模および設備コストを削減することが可能となる。 [Effect of the second embodiment]
Thus, in this embodiment, the current collector of the crane apparatus has a current collection point P in the middle part of the protection section S, and the power collection point P and the end point E of the protection section S are During this period, the wheels that roll on the power supply rail are supported rotatably, so that the cover can be stably supported above the power supply rail even when the current collecting point is located near the center of the cover. Can do.
For this reason, the rail length of a partial rail can be brought close to 1/2 of the protection section S, the number of switching devices provided for each partial rail and each partial rail can be minimized, and the equipment of the crane feeding system Scale and equipment costs can be reduced.
［実施の形態の拡張］
　以上の各実施の形態では、給電レール１として２条のレールを用いる場合を例として説明したが、これに限定されるものではない。例えば、電源電力として３相交流電源を用いる場合には、前述した図５や図７において、給電レールを３条並行に条設すればよい。
　また、給電レール１は、地上の接地電位と電気的に絶縁されていることを前提として説明したが、いずれか１条を地上の接地電位と電気的に接続してもよい。これにより、電源装置２１と部分レール１１の間を接続する一部あるいはすべての区間において、配線ケーブルの本数を削減することが可能となる。 [Extended embodiment]
In each of the above embodiments, the case where two rails are used as the power supply rail 1 has been described as an example, but the present invention is not limited to this. For example, when a three-phase AC power source is used as the power source, in FIG. 5 and FIG. 7 described above, three power supply rails may be provided in parallel.
Moreover, although the description has been made on the assumption that the power supply rail 1 is electrically insulated from the ground potential on the ground, any one of the rails may be electrically connected to the ground potential on the ground. Thereby, the number of wiring cables can be reduced in a part or all of the sections connecting the power supply device 21 and the partial rail 11.
　また、各実施の形態では、図３あるいは図７に示したように、給電レール１を構成する複数のレールが、クレーン装置６の一方のタイヤ６Ｅの外側に並行して条設されている場合を例として説明したが、クレーン装置６に対する給電レール１の条設位置については、これに限定されるものではない。例えば、クレーン装置６のタイヤ６Ｅの内側に並行して給電レール１を構成する複数のレールを条設してもよく、タイヤ６Ｅの外側と内側に分離して複数のレールを並行して条設してもよい。さらには、クレーン装置６の架台６０を支持する左右両側のタイヤ６Ｅの外側あるいは内側に分離して給電レール１を構成する複数のレールを条設してもよい。 Moreover, in each embodiment, as shown in FIG. 3 or FIG. 7, a plurality of rails constituting the power supply rail 1 are provided in parallel to the outside of one tire 6 </ b> E of the crane device 6. However, the position where the power supply rail 1 is provided with respect to the crane device 6 is not limited to this. For example, a plurality of rails constituting the power supply rail 1 may be provided in parallel to the inside of the tire 6E of the crane device 6, or the plurality of rails may be provided in parallel by separating the outer side and the inside of the tire 6E. May be. Furthermore, a plurality of rails constituting the power supply rail 1 may be provided separately from the outside or the inside of the left and right tires 6E that support the gantry 60 of the crane device 6.
　また、各実施の形態では、図３あるいは図７に示したように、給電レール１を、電源電力２５の給電用レールとして用いるとともに、クレーン装置６のカバー３を走行させるための走行レールとして用いる場合を例として説明したが、これら目的に応じたレールを別個に並列して設けてもよい。
　また、各実施の形態では、図３あるいは図７に示したように、地上Ｇに設けた溝１２内に給電レール１を条設した場合を例として説明したが、これに限定されるものではない。例えば、レーンに立ち入る移動体が人のみの場合、あるいは多少の突起を乗り越えて移動できる車両や装置がレーンに立ち入る場合には、地上Ｇの地面にそのまま給電レール１を条設してもよい。 Moreover, in each embodiment, as shown in FIG. 3 or FIG. 7, the power supply rail 1 is used as a power supply rail for the power supply 25 and also used as a travel rail for traveling the cover 3 of the crane device 6. Although the case has been described as an example, rails according to these purposes may be separately provided in parallel.
In each embodiment, as shown in FIG. 3 or FIG. 7, the case where the power supply rail 1 is provided in the groove 12 provided on the ground G has been described as an example. However, the present invention is not limited to this. Absent. For example, when the moving body that enters the lane is only a person, or when a vehicle or device that can move over some protrusions enters the lane, the power supply rail 1 may be provided on the ground G as it is.
　また、各実施の形態では、切替装置２３が部分レール１１ごとに配置されている場合について説明したが、複数の切替装置２３の機能を１つの切替装置に集約してもよい。すなわち１つの切替装置内に、個々の部分レール１１から得られた電気信号に基づいて当該部分レールと集電子との電気的接触を検出する検出器と、この検出器の検出出力に基づいて対応する部分レールに対して電源電力を切替供給する切替器とを設け、この切替装置と各部分レールとを配線ケーブルで放射状に接続すればよい。これにより、切替装置の数を削減でき、クレーン給電システムの設備規模および設備コストを削減することが可能となる。 Moreover, although each embodiment demonstrated the case where the switching device 23 was arrange | positioned for every partial rail 11, you may integrate the function of the several switching device 23 into one switching device. That is, in one switching device, a detector that detects an electrical contact between the partial rail and the current collector based on an electrical signal obtained from each partial rail 11, and a response based on the detection output of the detector It is only necessary to provide a switch for switching and supplying power to the partial rail to be connected, and to connect the switching device and each partial rail in a radial pattern with a wiring cable. Thereby, the number of switching devices can be reduced, and the equipment scale and equipment cost of the crane power feeding system can be reduced.
　クレーン装置に対して給電レールから電源供給を行うクレーン給電技術として有用であり、例えば、コンテナターミナルにおいて、船舶やトレーラーに対するコンテナの積み降ろしなどの荷役を行う門型のクレーン装置で用いられる。 It is useful as a crane power supply technology for supplying power from a power supply rail to a crane device. For example, it is used in a gate-type crane device that performs loading and unloading of a container with respect to a ship or a trailer at a container terminal.

Claims (7)

  1. 　外部から供給された電源電力により動作するクレーン装置と、
    　このクレーン装置が走行するレーンに沿って条設された給電レールと、
    　この給電レールに対して電源電力を供給する給電部と
    　を備え、
    　前記クレーン装置は、前記給電レールと電気的に接触することにより前記給電部から供給された電源電力を集電する集電子と、当該集電点を含む前記給電レールの一部を保護区間としてその上方から覆うことにより、当該保護区間での前記給電レールに対する感電を保護する感電保護部を有し、
    　前記給電レールは、互いに電気的に絶縁された複数の部分レールの列からなり、
    　前記部分レールは、前記保護区間の端点から前記集電点までの保護距離以下のレール長を有し、
    　前記給電部は、前記部分レールのうち前記集電子と電気的に接触している部分レールに対してのみ電源電力を供給する
    　ことを特徴とするクレーン給電システム。     A crane device that operates with power supplied from outside;
    A power supply rail provided along the lane in which the crane device travels;
    A power supply section for supplying power to the power supply rail,
    The crane device has a current collector that collects power supplied from the power feeding unit by making electrical contact with the power feeding rail, and a part of the power feeding rail including the current collecting point as a protection section. By covering from above, it has an electric shock protection part for protecting electric shock to the power supply rail in the protection section,
    The feed rail is composed of a plurality of rows of partial rails that are electrically insulated from each other,
    The partial rail has a rail length equal to or less than a protection distance from an end point of the protection section to the current collecting point,
    The power feeding unit supplies power to only a partial rail that is in electrical contact with the current collector of the partial rails.
  2. 　請求項１に記載のクレーン給電システムにおいて、
    　前記給電部は、前記部分レールから得られた電気信号に基づいて当該部分レールと前記集電子との電気的接触を検出する検出器と、この検出器の検出出力に基づいて対応する部分レールに対して電源電力を切替供給する切替器とを有する
    　ことを特徴とするクレーン給電システム。     In the crane electric power feeding system of Claim 1,
    The power feeding unit includes a detector that detects electrical contact between the partial rail and the current collector based on an electrical signal obtained from the partial rail, and a corresponding partial rail based on a detection output of the detector. A crane power supply system comprising: a switch for switching power supply to the power supply.
  3. 　請求項２に記載のクレーン給電システムにおいて、
    　前記クレーン装置は、前記集電子が電気的に接触している部分レールに対して前記電気信号を出力する
    　ことを特徴とするクレーン給電システム。     In the crane electric power feeding system of Claim 2,
    The crane power supply system, wherein the crane device outputs the electrical signal to a partial rail with which the current collector is in electrical contact.
  4. 　請求項１に記載のクレーン給電システムにおいて、
    　前記給電レールは、前記レーンのうち任意の移動体が進入する区間においてのみ、前記部分レールの列からなる
    　ことを特徴とするクレーン給電システム。     In the crane electric power feeding system of Claim 1,
    The power feeding rail is composed of a row of the partial rails only in a section in which an arbitrary moving body enters the lane.
  5. 　請求項１に記載のクレーン給電システムにおいて、
    　前記集電子は、前記感電保護部に回動自在に支持されて前記給電レール上を転動するとともに、当該給電レールとの物理的接触点を集電点として当該給電レールから電源電力を集電する車輪からなる
    　ことを特徴とするクレーン給電システム。     In the crane electric power feeding system of Claim 1,
    The current collector is rotatably supported by the electric shock protection unit and rolls on the power supply rail, and collects power from the power supply rail using a physical contact point with the power supply rail as a current collection point. A crane power feeding system characterized by comprising wheels that perform.
  6. 　請求項１に記載のクレーン給電システムにおいて、
    　前記集電子は、前記保護区間の中間部に集電点を有し、
    　前記感電保護部は、前記集電点と前記保護区間の端点との間に、前記給電レール上を転動する車輪を回動自在に支持する
    　ことを特徴とするクレーン給電システム。     In the crane electric power feeding system of Claim 1,
    The current collector has a current collecting point at an intermediate portion of the protection section,
    The electric shock protection unit rotatably supports a wheel that rolls on the power supply rail between the current collection point and an end point of the protection section.
  7. 　外部から供給された電源電力により動作するクレーン装置と、このクレーン装置が走行するレーンに沿って条設された給電レールと、この給電レールに対して電源電力を供給する給電部とを備えるクレーン給電システムで用いられるクレーン給電方法であって、
    　前記クレーン装置により、集電子を介して前記給電レールと電気的に接触することにより前記給電部から供給された電源電力を集電するステップと、
    　前記クレーン装置により、前記集電点を含む前記給電レールの一部を保護区間としてその上方から覆うことにより、当該保護区間での前記給電レールに対する感電を保護するステップと、
    　前記保護区間の端点から前記集電点までの保護距離以下のレール長を有し、互いに電気的に絶縁されて条設されることにより前記給電レールを構成する複数の部分レールのうち、前記集電子と電気的に接触している部分レールに対してのみ前記給電部から電源電力を供給するステップと
    　を備えることを特徴とするクレーン給電方法。     Crane power supply comprising a crane device that operates by power supply supplied from outside, a power supply rail provided along a lane in which the crane device travels, and a power supply unit that supplies power to the power supply rail A crane power feeding method used in the system,
    Collecting the power supplied from the power supply unit by making electrical contact with the power supply rail via the current collector by the crane device; and
    Protecting electric shock to the power supply rail in the protection section by covering a part of the power supply rail including the current collection point from above as a protection section by the crane device;
    Of the plurality of partial rails that have the rail length that is equal to or less than the protection distance from the end point of the protection section to the current collection point and that are electrically insulated from each other to form the power supply rail, Supplying the power from the power feeding unit only to the partial rail that is in electrical contact with the electrons.
PCT/JP2009/056251 2008-03-27 2009-03-27 Crane feed system and method WO2009119791A1 (en)

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