JP4255559B2 - Power supply device for container crane - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power supply device for a container crane.
[0002]
[Prior art]
A container crane loads or unloads a container with a container ship that travels on a traveling rail laid along a quay and touches the berth. On the upper part of the legs of the container crane is a girder that is horizontally provided so as to be orthogonal to the traveling rail, and a boom that is extended to the sea side of the girder and that is pivotably connected in the vertical direction. Is provided. When the container ship berths, the boom stands up so as not to obstruct the berthing, and when carrying out cargo handling work, the boom is held horizontally so as to overhang the container ship. (Hereafter, girder and boom are collectively called “keta”.)
[0003]
As shown in FIG. 1, a traveling rail 4 is laid on the column 1 of the container crane, and a trolley 2 is provided on the traveling rail 4 so as to be movable via wheels 2a. The head block 3 is suspended from the trolley 2 by a rope 12 and can be moved up and down by a hoisting device provided on the land side on a girder (not shown). The power supply cable 10 passes through a machine room provided above the ground, and is hung with the middle fixed to the bottom of the trolley 2 as shown in FIG. When the head block 3 rises in the cable basket 8 that has been lifted, the head block 3 is automatically stored while being wound around, and when the head block 3 is lowered, power is supplied to the equipment provided on the spreader 9 while being fed out.
[0004]
[Problems to be solved by the invention]
However, such a power supply device for a container crane has no problem because the power supply cable is automatically stored in the cable basket while winding the head block when the head block is slowly raised, but there is no problem. When the head block is moved obliquely or when it is wound in a strong wind, the head block may not catch up with the movement of the trolley, and the feeding cable may protrude from the cable basket as shown in FIG. If the power supply cable is spilled, the spilled power supply cable will get caught somewhere and cause a cutting accident. In addition, in order to prevent a cutting accident, there is a problem that when the protrusion is caused, the container transfer must be suspended.
[0005]
The present invention was devised to solve the above-described problems, and prevents breakage of the power supply cable due to the protrusion of the power supply cable from the cable basket that occurs when the head block is raised, and the container. It is an object of the present invention to provide a power supply device for a container crane designed to improve the efficiency of cargo handling work.
[0006]
[Means for Solving the Problems]
According to the present invention, the upper end is fixed and suspended from the bottom of a trolley that moves on the crane rack, and the lower end is wound and stored in a cable basket disposed on the head block to grip the container. A power supply device for a container crane that supports a power supply cable that supplies power to equipment on a spreader, when a cable moving device that moves in the longitudinal direction of the fixed portion of the power supply cable is provided on the trolley to lift the head block There is provided a power supply device for a container crane that prevents the power supply cable from protruding from the cable basket.
[0007]
It is preferable that the feeding cable is movable in the width direction of the digit in addition to the longitudinal direction of the digit.
[0008]
Next, the operation of the present invention will be described.
During the container handling operation, the trolley grips the container with the spreader, moves at a high speed on the pole while lifting the head block with the rope, and stops at a predetermined position. When the trolley starts to move, the head block moves while being lifted by the trolley, so that the head block moves after being delayed after the trolley. At this time, in order to correct the displacement between the fixing portion of the feeding cable to the trolley and the upper end of the cable basket, the feeding portion of the feeding cable is automatically moved in synchronization with the acceleration of the trolley by the cable moving device provided on the trolley. Move backward in the direction of travel. When the head block catches up with the trolley, it is returned to its original position so that the fixed part is always directly above the upper end of the cable basket. Further, during cargo handling work during strong winds, the driver is operated remotely from the cab and moves the fixing portion of the power feeding cable toward the windward side. In this way, the power feeding cable is moved by the cable moving device, and the power feeding cable is smoothly stored while winding the tuna in the cable basket, so that a cutting accident does not occur. Since there is no interruption, it is possible to improve the efficiency of container handling work.
[0009]
[Embodiments of the Invention]
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a power supply device for a container crane according to the present invention. FIG. 2 is an enlarged view of the power feeding apparatus.
[0010]
In the figure, reference numeral 1 denotes the length of a container crane. Reference numeral 2 denotes a trolley that is provided so as to be movable on a traveling rail 4 laid on the rack 1 via wheels 2b. Reference numeral 3 denotes a head block, which is suspended by a rope 12 wound around a sheave 6 provided on the upper surface and a sheave 5 provided on the trolley 2, and lifted by a hoisting device (not shown) provided on the land side above the frame 1. It is supposed to be. The sheave 6 is pivotally supported on the sheave shaft 7.
[0011]
Denoted at 8 is a bottle-shaped hollow cable basket standing at the center of the upper surface of the head block 3. A spreader 9 is detachably provided on the lower surface of the head block 3, and a container guide (flipper) 9 a for guiding the container 11 when the container 11 is gripped is pivotally supported at four corners. In addition, twist lock type container tightening devices (not shown) for holding the container 11 are provided at the four corners of the lower surface of the spreader 9.
[0012]
Reference numeral 10 denotes a power supply cable. The power supply cable 10 is fixed to a cable moving device 13 (described later) provided on the trolley 2 through a machine room provided on the ground 1 and when the head block 3 is raised, Is housed in the cable basket 8 while automatically winding the core, and when the head block 3 is lowered, it is fed out from the cable basket 8 and supplies power to the equipment on the spreader 9 that holds the container 11.
[0013]
As shown in FIG. 2, the cable moving device 13 includes a rectangular frame 13 a having one side opened, a screw rod 14 screwed with a piece 15 provided in the longitudinal direction in the frame 13 a, and a screw rod 14. The motor 16 is configured to support one end, rotate the screw rod 14, and move the feeding cable 10 in one longitudinal direction (in the direction of the arrow 21) with the piece 15 fixed by the fixing member 19. 19a is a fixed part. A bearing 16 a supports the other end of the screw rod 14.
[0014]
Reference numeral 17 denotes an electric cylinder for moving the feeding cable 10 according to claim 2 also in the width direction of 1. The front end of the electric cylinder 17 is fixed to the middle of the rectangular side plate 13b of the frame 13a, and the rear end is fixed to the bottom of the trolley 2. Reference numeral 18 denotes a pair of guides provided in the width direction 1 of the bottom of the trolley 2. Reference numeral 18a denotes a guide roller provided on the side plate 13c in the width direction of the frame 13a. The cable moving device 13 moves on the guide 18 in the width direction of the boom (in the direction of the arrow 22) via the guide roller 18a by the expansion and contraction of the electric cylinder 17.
[0015]
Next, the operation of this embodiment will be described.
During the cargo handling operation of the container 11, the trolley 2 grips the container 11 with the spreader 9, moves at high speed while lifting the head block 3 with the rope 12, and stops at a predetermined position. When the movement of the trolley 2 is started, the head block 3 moves while being lifted by the trolley 2, so that the head block 3 moves so as to follow after the trolley 2. At this time, the cable moving device 13 provided on the trolley 2 automatically synchronizes with the acceleration of the trolley 2 in order to correct the displacement between the fixing portion 19a of the power supply cable 10 to the trolley 2 and the upper end of the cable basket 8. The fixing portion 19a of the power supply cable 10 is moved rearward in the traveling direction of the trolley 2. When the head block 3 catches up with the trolley 2, it is returned to its original position so that the fixing portion 19a is always directly above the upper end of the cable basket 8. Further, during cargo handling work during strong winds, the driver operates from the cab 20 by remote control, and moves the fixing portion 19a of the power supply cable 10 toward the windward side. In this way, the feeding cable 10 is moved by the cable moving device 13, and the feeding cable 10 is smoothly stored in the cable basket 8 while being wound around the cable basket 8, so that there is no occurrence of a cutting accident. Since the loading / unloading work of 11 is not interrupted, the efficiency of the loading / unloading work of the container 11 can be improved.
[0016]
The present invention is not limited to the above-described embodiment. For example, the movement of the power supply cable may be performed by a carriage type having a hydraulic cylinder, a link mechanism, or a guide instead of a screw rod. Of course, various changes can be made without departing from the scope of the present invention.
[0017]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent breakage of the power supply cable caused by the protrusion of the power supply cable from the cable basket that occurs when the head block is lifted, and to improve the efficiency of container handling work. Excellent effect.
[Brief description of the drawings]
FIG. 1 is a side view of a cable feeder for a container crane according to the present invention.
FIG. 2 is an enlarged view of a cable feeder.
FIGS. 3A and 3B are schematic explanatory diagrams of a cable feeder, in which FIG. 3A shows a state in which the feeder cable protrudes from the cable basket, and FIG. 3B shows a state in which the feeder cable is moved to the rear of the trolley by the cable moving device; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Crane girder 2 Trolley 3 Head block 4 Traveling rail 7 Axis 8 Cable basket 9 Spreader 10 Feeding cable 11 Container 12 Rope 13 Cable moving device 14 Screw rod 15 Piece 16 Motor 17 Electric cylinder 19a Fixed part

Claims (2)

The upper end is fixed and suspended from the bottom of the trolley that moves over the crane frame, and the lower end is housed in a cable basket placed on the head block. The power is supplied to the equipment on the spreader that holds the container. A power supply device for a container crane that supports a power supply cable, and a power supply cable that is generated when the head block is lifted by providing a cable moving device that moves in the longitudinal direction of the fixed portion of the power supply cable on the trolley A power supply device for a container crane, characterized by preventing overhang from the basket. 2. The power supply device for a container crane according to claim 1, wherein the power supply cable is movable in the width direction of the frame in addition to the longitudinal direction of the frame.

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