JP4970332B2 - Yard crane power feeder - Google Patents

Description

  The present invention relates to a power supply device for a yard crane that handles containers in a container yard such as a harbor.

[Outline of container yard]
In container transportation for safely transporting a large amount of goods, for example, as shown in FIGS. 12 and 13, a large number of containers C are stacked on a plurality of lanes L <b> 1 to L <b> 8 in a container yard W. The cargo handling is performed by the gantry crane 200, and the container C is transported by the chassis t between the gantry crane 200 and each lane L1 to L8, and the cargo handling on each lane L1 to L8 is performed by the yard crane 100. Yes.

[Outline of Yard Crane]
The yard crane 100 is generally provided with a traveling device in a lower part of a gate-shaped structure composed of a girder and leg members extending from both end sides to the road surface side. It has a steering function to rotate it. In addition, an engine generator for supplying electric power to various electric devices and electric devices used in the traveling device and the trolley is mounted. Furthermore, a cockpit is provided in the trolley, and the driver can operate and lift the container C in the cockpit.

[Trade of cargo handling work]
In such a container yard W, since the cargo handling amount in each of the lanes L1 to L8 is different, the cargo handling work becomes busy for each lane. Therefore, the yard crane is moved to a lane with a large cargo handling amount (for example, lane L1). Carrying efficiency of the container yard W is improved by performing “lane change” and introducing a plurality of yard cranes 100 into the busy lane L1.

  Since the yard crane 100 configured as described above is supplied with power from the engine generator provided in the crane 100, the lane change can be performed without being restricted by the supply of power. It was possible.

[Environment issues]
However, in recent years, interest in environmental problems such as exhaust gas and noise discharged from the engine generator mounted on the yard crane 100 has increased, and countermeasures against exhaust gas and noise are required. . In addition, since the fuel cost is high, it has been studied to use a power source for the yard crane as an external power source such as a general power source.

As an external power source, a power supply device provided on the ground side and a power supply cable on the crane body side are connected (for example, refer to Patent Document 1), or a power supply trolley wire wired along a lane A pantograph-type current collector on the crane body side is pressed to receive power (see, for example, Patent Document 2).
JP 2003-137493 A JP 05-319777 A

  However, the yard crane described in Patent Document 1 is supplied with power by manually connecting a ground-side power supply device and a crane-side cable. At that time, the ground from a cockpit of several tens of meters above the ground is used. The driver must go down to the cockpit and go up to the cockpit, and the driver needs a lot of exercise every time the lane is changed. It has become.

  In addition, the yard crane described in Patent Document 2 has a problem in that a power supply trolley wire has to be installed over the entire length of each lane, and an installation space is required for that purpose, which is expensive. In addition, since the power supply trolley wire is cut or worn by being pressed by the current collector, there is a problem in that maintenance costs and time are required.

  An object of the present invention is to provide a yard crane including a power feeding device that automatically performs a connection operation and a connection release operation between a power supply cable of a yard crane and a ground-side power supply device in view of the above-described problems. To do.

  The power feeding device in the yard crane according to the present invention is configured as follows.

  1) A girder 15, a portal structure 12 provided with leg members 13 at both ends thereof, a traveling device 14 provided with wheels 14 a on the lower end side of the leg members 13, and traversing along the girder 15 In the yard crane A provided with a trolley 16 provided with a hanging tool 17 for the container C, a reel 10 around which a power supply cable 7 for supplying electric power is wound, and a mechanism 10a for rotating this reel, the yard crane The electric power which formed the recessed part 2c which receives the convex electrode body 1 when the convex electrode body 1 formed in the front-end | tip of the said electric power feeding cable 7 was dropped by own weight in the vicinity of the driving | running | working road surface R on which A travels on it. The concave electrode body 2 for supplying the liquid is provided.

  2) The electrode e1 of the convex electrode body 1 and the electrode e2 of the concave electrode body 2 are arranged in a triangular shape and the electrodes e1 and e2 are opposed to each other, and the convex electrode body 1 and the concave electrode body It is characterized by having comprised so that 2 may be connected.

  3) A partial cross-section of the outer peripheral surface of the convex electrode body 1 has a triangular or three-point contact guide portion 1 f, and the concave portion 2 c of the concave electrode body 2 is a guide portion of the convex electrode body 1. The electrode e1 of the convex electrode body 1 and the electrode e2 of the concave electrode body 1 are respectively arranged in a triangular shape, and the power source of the concave electrode body 2 is a three-phase power source. It is characterized by being.

  4) The concave electrode body 2 includes a drainage means 2b for discharging rainwater or the like.

  1) A convex electrode body having a triangular cross section is provided on the front end side of the power supply cable, and the electrode on the convex electrode body side and the electrode on the power supply apparatus side are connected by simply dropping the convex electrode body into the insertion port of the power supply device. Since the electric power is supplied in contact with each other, the operation of inserting / removing the power feeding cable that is performed every time the lane is changed can be easily and quickly performed. And the operation | work which connects the power supply device and a convex electrode body manually by the driver | operator of a yard crane becomes unnecessary, and the burden on a driver | operator is reduced significantly.

2) A three-phase power source is used as a power source, and furthermore, the electrodes of the convex electrode body and the power supply device are each triangular, so that the polarity of the electrode of the convex electrode body and the polarity of the electrode of the power source device are Even if it is connected in a state that does not correspond to rotation, the yard crane can be operated without any problem because the phase progress is the same. Accordingly, it is not necessary to perform the connecting operation while confirming the polarities of the convex electrode body and the power supply device, so that the trouble of the driver is omitted.
In addition, since the convex electrode body is not fixed to the yard crane side, when the connection between the convex electrode body and the power supply device is released, the convex electrode body rotates in the direction to eliminate the twist of the power feeding cable. Relieve power.

  3) By forming the guide part of the convex electrode body and the guide part of the power supply device so as to face each other, the convex electrode body can be more reliably protruded by dropping it into the insertion port of the power supply device by its own weight. The electrode body and the power supply device are connected.

  4) Furthermore, since the electrode of the convex electrode body and the electrode of the power supply device are each arranged in a triangular shape, it is possible to secure a sufficient surface area.

  5) Due to the weight of the convex electrode body, the contact pressure with the electrode of the concave electrode body increases, and a reliable electrical connection is made.

  6) Since rainwater and the like are discharged by the drainage means, leakage and short circuit are prevented. Moreover, since rainwater etc. flows into the drainage channel formed around the electrode, the electrode is prevented from being submerged.

  Hereinafter, a power supply device for a yard crane according to the present invention will be illustrated and described.

  As shown in FIGS. 1 and 2, the yard crane A includes a girder 15, a portal structure 12 provided with leg members 13 on both ends thereof, and wheels or tires 14 a on the lower end side of the leg members 13. And a reel 10 around which a power supply cable 7 for supplying electric power to the traveling device 14 is wound. I have. A driver seat M is provided on the trolley 16.

  Further, a guide means such as a magnet for stably driving the yard crane A along the lane is embedded in the road surface R, and a convex electrode body formed at the tip of the power supply cable 7 in the vicinity of the guide means. A concave electrode body 2 (socket) is provided in which a receiving portion 2c for receiving the convex electrode body 1 when 1 (plug) is dropped is formed.

  Further, as shown in FIGS. 4 and 5, the convex electrode body 1 is formed in a triangular prism shape having a guide slope 4 formed below, and the concave electrode body 2 receives the convex electrode body 1. A triangular receiving portion 2c is formed, and a guide 5 that expands the diameter is provided above the receiving portion 2c. The electrode e1 of the convex electrode body 1 and the electrode e2 of the concave electrode body 2 are arranged in a triangular shape, and both the electrodes e1, e1 are connected in a state where the convex electrode body 1 and the concave electrode body 2 are connected. e2 faces each other.

  The power supplied to the concave electrode body 2 is a three-phase three-wire, and the three electrodes e2 are an R pole, an S pole, and a T pole, respectively. Further, the three electrodes e1 of the convex electrode body 1 are arranged corresponding to the respective electrodes of the electrode e2 of the concave electrode body 2. If a ground electrode is required, it can be arranged at the center of the triangle.

  Moreover, the concave electrode body 2 is provided for each lane (L1 to L8) as shown in FIG. In addition, the concave electrode body 2 may be provided at two or more locations so that cargo handling work can be performed with two or more yard cranes.

  Furthermore, as shown in FIG. 2 in the lower part of the yard crane A, in this embodiment, the power cable 7 suspended from the reel 10 is guided to the sill beam 18 to the guide groove 20 provided on the road surface R, In addition, a guide device 8 is provided for guiding the convex electrode body 1 provided at the tip of the power supply cable 7 to the receiving portion 2 c of the concave electrode body 2.

  As shown in FIG. 11, the guide device 8 is provided with positioning means 8a for guiding the convex electrode body 1 to the receiving portion 2c of the concave electrode body 2 based on a signal from the guiding means 35 provided on the road surface R. It has been. The guiding means 35 can use radio waves, magnetism, infrared rays, etc., and the guiding means 2f is detected by the detecting means 31 provided in the positioning means 8f, and the position of the guide device 8 is adjusted by the control device 30. It has become. The guiding means 35 can be provided on the concave electrode body 2.

  As the positioning means 8f, for example, as shown in FIG. 11, the positioning device 8 is configured such that the tip of the positioning device 8 can be swung like a universal joint 8d and the tip is driven by a hydraulic cylinder 8s. .

  The reel 10 includes an electric motor 10a (see FIG. 1) that rotates the reel 10 in the winding direction of the power supply cable 7, and a convex electrode body 1 provided at the tip of the cable 7 as shown in FIG. The concave electrode body 2 is dropped into the receiving portion 2c.

  Further, as shown in FIG. 4, the receiving part 2c of the concave electrode body 2 is provided with a drain hole 2b for discharging liquid such as rain water, and the rain water is provided around the electrode e2 provided on the bottom surface of the receiving part 2c. An annular recess 2a (drainage channel) is formed to flow down to the drainage hole 2b.

(Handling work)
As shown in FIG. 3, the yard crane A configured as described above travels in parallel (in the directions of arrows X and X ′) along the lanes L1 to L8, and the container C in each lane. Cargo handling.

  For example, when the container C is unloaded on the lane L2, the yard crane A moves in parallel along the lane L2, and the container C is stacked or mounted on the chassis T. Further, as shown in FIG. 9, the feeding cable 7 is accommodated in a cable guide groove 20 formed on the road surface R by the guide device 8. Further, when the power feeding cable 7 is wound, the guide device 8 keeps the power feeding cable 7 positioned in the vicinity of the guide groove 20, so that the power feeding cable 7 is prevented from being lifted from the guide groove 20. Therefore, the power feeding cable 7 is not stepped on the wheel 14a (tire) of the traveling device 14 to be disconnected, and does not protrude on the road surface R and prevent the chassis T from traveling.

(Lane change)
When changing lanes, the yard crane A is moved to the vicinity of the concave electrode body 2, and the wheels 14a of the traveling device 14 are rotated in a 90-degree horizontal plane by a steering mechanism (not shown). The sensor 31 of the guide device 8 detects the signal of the guiding means 35 embedded in the road surface R, and moves the tip of the guide device 8 to the receiving portion 2 c of the concave electrode body 2. This alignment operation is automatically performed by the control device 30.

  Next, the reel 10 is rotated to wind up the cable 7 to lift the convex electrode body 1 upward, and the connection with the concave electrode body 2 is released. The convex electrode body 1 pulled up is housed in a stable state at the distal end portion (positioning means 8f) of the guide device 8.

  In this way, the connection between the convex electrode body 1 and the concave electrode body 2 is released, and the motor of the wheel 14a of the traveling device 14 is driven by a battery device or a small engine mounted on the yard crane A to achieve the target lane ( For example, travel to L4) (arrow Y ′ direction). When moving onto the target lane L4, the guide device 8 detects the signal of the guiding means 35 provided on the lane L4 and automatically aligns the convex electrode body 1 and the concave electrode body 2. The reel 10 is slightly rotated in the unwinding direction to drop the convex electrode body 1 into the receiving portion 2c of the concave electrode body 2 to complete the connection.

  Lane replacement can be performed as described above, and since a plurality of yard cranes A can be loaded into a lane with a large number of cargo handling, the cargo handling efficiency in the container yard W is improved. .

  According to the present invention, the coupling operation is completed simply by dropping the convex electrode body into the concave electrode body, and the coupling release operation is completed simply by pulling up the concave electrode, so that these operations can be performed easily and quickly. Further, since the connection between the convex electrode body and the concave electrode body and the release thereof are performed automatically, the driver is freed from working manually, and the burden on the driver can be greatly reduced. .

  In addition, the guide device ensures that the convex electrode body is dropped toward the receiving portion of the concave electrode body, so that the driver does not have to perform positioning, and the convex electrode body and the concave electrode body are omitted. The connection with the electrode body is ensured and the reliability is improved.

  Since the manual operation of manually connecting or removing the convex electrode body and the concave electrode body is not required, it is possible to prevent an electric shock due to the high voltage supplied to the concave electrode body.

  Moreover, since the contact pressure between the electrode of the convex electrode body and the electrode of the concave electrode body can be increased by the dead weight of the convex electrode body, reliable energization is performed.

  Furthermore, since the power source is a three-phase power source and each electrode of the three-phase three-wire is arranged in a triangular shape, it becomes more compact than a conventional convex electrode body in which three electrodes are arranged in a straight line, A sufficient distance between the electrodes is ensured, and a short circuit is prevented to improve safety. If a ground electrode is required, it can be arranged at the center of the triangle.

  In addition, since the flat cross-sectional shape of the convex electrode body and the concave portion of the concave electrode body are triangular, and a guide is provided for sliding and guiding both electrode bodies, the positioning and connection are ensured. . In addition, since the electrodes of the convex electrode body and the concave electrode body are arranged in a triangular shape so as to face each other, the electrodes are always in contact with each other so that power is supplied.

  In the present embodiment, the power cable guide device is installed in the center of the sill beam. However, the present invention is not limited to this. In addition, the guide device can be arranged in parallel with the traveling device.

  In addition, a cover body that covers the concave electrode body may be provided on the convex electrode body so that rainwater, dust, and the like do not enter inside while the convex electrode body and the concave electrode body are connected.

  Further, the positioning device is not limited to the cylinder device described in the present embodiment, as long as the positioning device is configured to detect the concave portion and direct the convex electrode body toward the concave portion.

  Further, as shown in FIG. 7, the convex electrode body is formed with a guide 4 at the bottom and positioning means 1f on a part of the side surface, or a triangular guide 4 and positioning means on the side surface as shown in FIG. It is also possible to use an integrated 1f.

It is the schematic (front view) of the yard crane which concerns on this invention. It is a side view of FIG. It is the schematic (plan view) of the container yard which uses the yard crane which concerns on this invention. It is a figure explaining the connection operation of a convex electrode body and a concave electrode body. It is a perspective view of a convex electrode body. FIG. 6 is a bottom view of FIG. 5. It is a perspective view which shows the other embodiment of a convex electrode body. It is a perspective view which shows other embodiment of a convex electrode body. It is the schematic of the guide apparatus provided in the lower part of the yard crane which concerns on this invention. It is a figure which shows the front-end | tip part (positioning means) and concave electrode body of a guide apparatus which guides a convex electrode body. It is a figure which shows the alignment state of the front-end | tip part (positioning means) of a guide apparatus. It is the schematic (perspective view) of the conventional container yard. It is the schematic (plan view) of the conventional container yard.

Explanation of symbols

A Yard crane 1 Convex electrode body (plug)
2 Concave electrode body (socket)
2b Drainage hole 2c Receiving part 7 Feeding cable 8 Guide device 8d Universal joint 8f Positioning means 10 Cable reel 13 Leg member 14 Traveling device 14a Wheel (tire)
18 Sill beam 20 Guide groove e1, e2 electrode

Claims (4)

A girder, a gate-shaped structure provided with leg members on both ends thereof, a traveling device provided with wheels on the lower end side of the leg member, and a trolley provided with a container hanging tool extending along the girder, In a yard crane provided with a reel for winding a power supply cable for supplying electric power and a mechanism for rotating the reel,
Electric power is formed in the vicinity of the traveling road surface on which the yard crane travels, in which a concave electrode for receiving the convex electrode body is formed when the convex electrode body formed at the tip of the feeding cable is dropped by its own weight. A power supply apparatus for a yard crane, comprising a concave electrode body.   The electrode of the convex electrode body and the electrode of the concave electrode body are each arranged in a triangular shape, and the convex electrode body and the concave electrode body are connected in a state where both electrodes are opposed to each other. The power feeding device in the yard crane according to claim 1, wherein the power feeding device is a yard crane. A cross section of a part of the outer peripheral surface of the convex electrode body has a triangular or three-point contact guide portion, and the concave portion of the concave electrode body has a shape for receiving the guide portion of the convex electrode body, Furthermore, the electrode of the convex electrode body and the electrode of the concave electrode body are each arranged in a triangular shape,
The power supply device for a yard crane according to claim 1, wherein the power source of the concave electrode body is a three-phase power source.   2. The power supply apparatus for a yard crane according to claim 1, wherein the concave electrode body includes drainage means for discharging rainwater and the like.

Images