JPH1111866A - Container crane operating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save energy in operation of a container crane and give a long lifetime to appliances and components. SOLUTION: A container crane operating method includes a sea side trolley 3 and land side trolley 4 traveling on a crane girder 2 and also a traverser 5 which travels on the girder 2 between the two trolleys 3 and 4, whereby loading and unloading of a container 10 to/from a container ship 9 is made by the sea side trolley 3 while handing-over of the container 10 to/from any ground facility is made by the land side trolley 4, and transport of the container 10 between the two trolleys 3 and 4 is made by the traverser 5. Therein the operating sequence of loading and unloading to/from the ship 9 is set, and the winding-up distance of the sea side trolley 3 and the moving distance of the traverser 5 in each operating position are calculated, and control is made consisting of decreasing the wind-up speeds of trolleys 3 and 4 or the moving speed of the traverser 5 so that the waiting time of the sea side 3 or land side trolley 4 when they are in the upper limit position or the waiting time of the traverser 5 at each trolley 3/4 is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating a container crane installed on a quay such as a container wharf for loading and unloading containers on a container ship, and in particular, can save energy and extend the life of equipment and components. Related to driving method.

[0002]

2. Description of the Related Art In recent years, container vessels have become larger and larger, and a ship-shaped container vessel called Super Panamax, which has a far greater width than a conventional Panamax boat, has been used. Along with this, the time for unloading and unloading containers has become longer, and shortening has become a major issue.

[0003] The inventors of the present application have filed a patent application (Japanese Patent Application Laid-Open No. 7-337211 (not disclosed)) for an improved container crane for loading and unloading containers on a container ship in response to the above-mentioned problems. FIG. 9 is a front view of the container crane disclosed in the above application. In the figure, reference numeral 1 denotes a container crane which runs on a rail provided on a quay 8.
Reference numeral 2 denotes a crane girder, and the portion that protrudes toward the sea side is a boom that can be raised and lowered. Numeral 3 is a sea-side trolley, and a spreader detachable from the container 10 is suspended via a rope, and the container is raised and lowered by winding up and down the rope. Reference numeral 4 denotes a land-side trolley, which has the same structure as the sea-side trolley 3.

[0004] Reference numeral 5 denotes a traverser, on which the container 10 is placed and traversed on the crane girder 2 as shown by a dashed line.
Since the two trolleys 3 and 4 and the traverser 5 traverse on different rails on the crane girder 2, they can pass each other.

Reference numeral 6 denotes an elevated track, and reference numeral 7 denotes a bogie (chassis) which runs unmannedly on the elevated track. 8 is a quay and 9 is a container ship.

In such a container crane 1, the sea-side trolley 3 and the land-side trolley 4 are stopped at the container loading / unloading place, and are dedicated to hoisting and lowering the container 10. The container 10 reciprocates and moves laterally. When the containers 10 are transferred from the trolleys 3 and 4 to the traverser 5, it is confirmed that the respective trolleys 3 and 4 are at the upper limit of the hoisting state while holding the container 10, and then the traverser 5 is directly below the respective trolleys 3 and 4. Move up to. Each trolley 3, 4 is slightly rolled down and landed, the spreader is separated from the container 10, and the container 10 is put into the traverser 5. After the traverser 5 has loaded the container 10 and traversed, each trolley 3, 4 unwinds the spreader for the next cargo handling.

In general, when the trolleys 3 and 4 traverse while holding the container 10, the container 10 largely rolls when the trolleys 3 and 4 are suddenly started and suddenly stopped. Is difficult to shorten. On the other hand, in the above-mentioned invention, since the traverser 5 concentrates on the traversing, the speeding up and the rapid acceleration / deceleration are possible, and it is particularly effective when the container ship 9 is wide.

[0008]

In the operation method of the container crane described above, the land-side trolley 4 performs loading and unloading at a constant location and with a constant lifting and lowering distance. In No. 3, the loading / unloading location also changes in the winding and unwinding distances. Therefore, if the traversing speed of the traverser 5 and the hoisting and lowering speeds of the trolleys 3 and 4 are constant, depending on the position of the seaside trolley or the hoisting and lowering distance, the traverser 5 may be used.
Alternatively, a waiting time occurs in each of the trolleys 3 and 4. That is, for example, when the sea-side trolley 3 loads the container 10 at the lowest land side of the container ship 9, the traverser 5 has a short traversing distance, and the sea-side trolley 3 has a long hoisting / unwinding time. 5 has a waiting time and the container ship 9
When the container 10 in the uppermost stage on the sea side is to be unloaded, the traverser 5 has a long traversing distance and the winding and unwinding time of the sea side trolley 3 is short. Occurs.

The present invention has been devised in view of the problems of the prior art. The method of operating a container crane according to the present invention is a computer-controlled method for loading and unloading containers 10 to and from a container ship 9. An object of the present invention is to reduce the hoisting speed or moving speed of the trolley 3, the land-side trolley 4, or the traverser 5 in order to eliminate waiting time, thereby saving operating energy and extending the life of equipment and components. Things.

[0010]

In order to achieve the above object, a method of operating a container crane according to the present invention comprises a sea-side trolley and a land-side trolley moving on a crane girder, and further comprises a trolley between the two trolleys. Crane, having a traverser moving on the girder, loading and unloading containers to and from the container ship by the sea-side trolley, transferring containers to and from ground equipment by the land-side trolley, and by the traverser A container crane operating method for transferring containers between a sea-side trolley and a land-side trolley, comprising: setting a container handling order to a container ship; a lifting distance of the sea-side container at each loading position and Calculate the travel distance of the traverser, and wait for the sea-side trolley, land-side trolley at the hoisting upper limit position, or To eliminate the latency in Lori and controls to decelerate the moving speed of the hoist speed or traverser of each trolley.

Next, the operation of the present invention will be described. First, a cargo handling sequence for loading / unloading containers to / from a container ship is set. When loading and unloading containers according to the above-described order, the rolling distance of the sea-side trolley and the traversing distance of the traverser are calculated for each container. For each of the distances, the hoisting time of the sea-side trolley or the traversing time of the traverser when driving at the design speed is calculated. If the hoisting time is longer than the traversing time, there will be a waiting time in the traverser, and vice versa. By reducing the operating speed on the side where the waiting time occurs, the waiting time can be eliminated or minimized. The position and hoisting distance of the land-side trolley are constant, but if the traversing distance of the traverser is large, a waiting time occurs, so the hoisting speed is reduced. In this way, the hoisting / unwinding speed of the trolley or the traversing speed of the traverser can be reduced without reducing the operation efficiency of the container crane, so that the operating energy can be saved and the acceleration / deceleration is impossible. Since no force is applied, the life of equipment and components can be extended.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a trolley / traverser operation control device for controlling the operation method of the present invention. As shown in the figure, a signal for setting the cargo handling order is sent from the cargo handling sequence control device 12 to the arithmetic unit 11. Arithmetic unit 1
1, a signal is sent from various coordinate detectors as shown in FIG.
, And the hoisting distance and hoisting time of the sea-side trolley 3 are calculated. As a result, the sea side trolley 3 and the land side trolley 4
Since the waiting time of the traverser 5 can be calculated, the optimum value of the traversing speed of the traverser 5 or the hoisting speed of each of the trolleys 3 and 4 is calculated so as to eliminate the waiting time or minimize the waiting time. To control the number of rotations of the motor.

Hereinafter, a procedure for unloading the container 10 from the container ship 9 by the operation method of the present invention will be described with reference to a flow sheet. 2 to 5 are flow sheets showing the procedure of the operation. In addition, the contacts in each drawing are indicated by circled alphabets. The waiting time can be predicted by setting the cargo handling order as shown in FIG. 2 and detecting each coordinate.

If the expected waiting time does not occur in any of the land-side trolley 4, the sea-side trolley 3, or the traverser 5, the operation proceeds to FIG. In FIG. 3, since no waiting time occurs in any case, the land side trolley, the sea side trolley and the traverser may be operated at a predetermined design speed. If the traverser 5 traverses directly below the sea-side trolley 3 or the land-side trolley 4, there is a risk that the traverser 5 collides with the containers suspended on the trolleys 3 and 4.
4. Check if there is a waiting time, and if there is a waiting time, confirm that the trolleys 3 and 4 are at the winding upper limit position and traverse to just below. If there is no waiting time, close each trolley 3 and 4. To stop once, check whether winding is completed or not, and restart. Further, as shown in FIG. 4, after the land side trolley receives the container 10 from the traverser 5, it is confirmed that the traverser has escaped to the sea side, and then the lowering of the spreader holding the container 10 is started.

In FIG. 2, if a waiting time occurs in the trolleys 3 and 4, the process proceeds to FIG. As shown in FIG. 5, the time when the traverser 5 arrives at the sea-side trolley 3 is confirmed, and when the sea-side trolley 3 hoists at a normal hoisting speed, the hoisting is completed with a margin by the arrival time. In this case, the optimum hoisting speed is set by reducing the hoisting speed so that there is no margin. The same applies to the land-side trolley 4 as shown in FIG.

If a waiting time occurs in the traverser 5 in FIG. 2, the operation proceeds to FIG. As shown in FIG. 7, when the traverser 5 traverses to the sea-side trolley 3 at a normal speed after checking the arrival time of the sea-side trolley 3 at the winding upper-limit position, there is a margin before the arrival time of the winding-up upper-limit position. When the arrival of the traverser 5 is completed, the optimum traversing speed is set by reducing the traversing speed so that there is no margin. The same applies to the land-side trolley 4 as shown in FIG.

Although the procedure for unloading the container 10 from the container ship 9 has been described above, the same procedure can be used for loading the container 10 on the container ship 9.

The present invention is not limited to the embodiment described above, and various changes can be made without departing from the gist of the invention.

[0019]

As described above, the method of operating a container crane of the present invention reduces the waiting time generated in each trolley or traverser when hoisting or traversing at a normal speed by reducing the speed of each. Since the control is performed so as to eliminate the waiting time, unnecessary effects of high-speed operation can be avoided, and excellent effects such as energy saving and long life of equipment and components can be achieved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control device for controlling an operation method according to the present invention.

FIG. 2 is a flow sheet of the operation method of the present invention.

FIG. 3 is a flow sheet of the operation method of the present invention.

FIG. 4 is a flow sheet of the operation method of the present invention.

FIG. 5 is a flow sheet of the operation method of the present invention.

FIG. 6 is a flow sheet of the operation method of the present invention.

FIG. 7 is a flow sheet of the operation method of the present invention.

FIG. 8 is a flow sheet of the operation method of the present invention.

FIG. 9 is a front view of the container crane.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container crane 2 Crane girder 3 Sea side trolley 4 Land side trolley 5 Traverser 9 Container ship 10 Container

Claims (1)

[Claims] 1. A container ship having a sea-side trolley and a land-side trolley that moves on a crane girder, and a traverser that moves on a crane girder between the two trolleys. Operation method of a container crane that loads and unloads containers to and from the ground equipment by the above-mentioned land trolley, and transfers containers between the sea trolley and the land trolley by the above traverser The order of loading and unloading containers to and from the container ship is set, the lifting distance of the seaside container and the moving distance of the traverser at each loading position are calculated, and the winding of the seaside trolley and the landside trolley are calculated. The hoisting speed or traverser of each trolley is adjusted so as to eliminate the waiting time at the upper and upper limit positions or the waiting time at each trolley of the traverser. A method for operating a container crane, wherein the moving speed of the container is controlled to be reduced.