KR800000371B1 - Method and apparatus for controlling container handling operations - Google Patents

Abstract

A method of loading & unloading containers with a signal of a cipher address command & a cipher container number from the control center is provided. Its system of management includes a position detector for the positioned address of a crane, a controller connected to the output terminal of the position detector, an interlocking device corresponding to the output from the controller, a spreader device corresponding to the output from the interlocking device, and a transmitter for a work completion signal.

Description

How to Manage Container Handling

1 is a schematic side view of a typical dump facility of a container

2 is a front view of a port crane equipped for handling containers in a container dump.

3 is a side view of the pottle crane shown in FIG.

4 is a block diagram of a control system disclosed in the present invention.

5 is a block diagram showing an example of a crane management system suitable for container handling.

FIG. 6 is a schematic diagram showing an address (a title indicating a specific position for a plurality of blocks vertically and horizontally disposed in a dump) for a method of arranging a plurality of containers in a container dump.

The present invention relates to a container handling method in a container dump.

In recent years, with the development of a method of transporting a transport object in a container, container dumps have increased rapidly in loading, unloading, and the quantity of containers contained in a container ship.

Under these circumstances, in order to handle large quantities of containers effectively and quickly, computers have been used to handle containers automatically.

In general, a container dump is divided into a plurality of blocks given a specific address, and each block is assigned a plurality of containers in parallel.

The pottle crane is arranged to be movable in accordance with the row of containers. Each pot crane is equipped with a spreader that can move across its rows to handle containers. Furthermore, each port crane is arranged with a driver moving with the spreader. The driver in the cockpit handles the container after confirming the address of the container dump correctly. For this reason, in the case of an extremely wide container dump, the chance of making a mistake is increased, and it is extremely difficult to correct it once the work is wrong.

This is, of course, undesirable for modern container dumps that require accurate and promptness.

Accordingly, it is an object of the present invention to provide a novel method of directing container handling operations that can only handle containers by commanded address without depending on the driver's judgment.

In the first aspect of the present invention, a method of managing the loading and unloading of containers in a container dump is a method in which a driver of a crane cockpit responds to an address command signal and a container number signal sent from a control room. In the loading and unloading operation, a plurality of predetermined addresses are assigned to each area of the container dump where containers are to be placed, and the addresses of the predetermined containers are transmitted from the control room to the cockpit as work command signals, and the driver's address dress is mounted. In addition, the driver can handle the scheduled container only when the commanded address and the detected current address match each other.

In another aspect of the present invention, in the container dump, the operator of the crane control room in loading and unloading the container performs loading and unloading of the container in response to the coded address command signal and the coded container number signal sent from the control room. The control system includes a position detector for detecting the crane's bow dress, a controller connected to the position detector's output for output only when the detected bow dress matches the address commanded by the control room. Interlock corresponding to the output, Spreader corresponding to the output from the interlocking means for loading and unloading of the container directed by the control room, Sending the work completion signal to the control room through the controller when the commanded loading and unloading work is completed. It is composed of a device.

Referring to the above in detail with reference to the drawings, in the embodiment of FIG. 1, a plurality of containers 19 are stacked in six rows of two blocks of a container dump, and one pot crane 18 is disposed for each block. It is. The number of blocks and pot cranes and the number of containers here are exemplary and can be increased or decreased as needed, and other types of cranes can be used.

As shown, each pot crane 18 is equipped with a cockpit 20 and a spreader 21 mounted to move across the rows of containers. The truck 22 which can move along the row of containers is located and the container is loaded by the spreader 21 on the row. These trucks 22 are capable of entering and exiting as well as out of the container dump for transporting containers. The central control room 11 is provided with a control system for sending a command signal to each facility of the container dump prepared according to the information of the container ship, the space in the ship, the number of containers to be handled for the purpose of carrying out the planned container handling work, and the like.

2 and 3 show details of the pot crane 18 being able to move along the rows of containers to transport, load and unload the containers.

As shown in the figure, the pot crane is provided with four side angles 32, each side having two wheels 31 and a pair of opposite side angles 32 interconnecting each other. The girder 33 and the cross beam 35 parallel and spaced with the girder 33 for interconnecting the lateral angle 32 and the ipsilateral angle 32 are girder ( It is mounted on it so that it can move according to 33). A spreader 37 mounted to engage the container 19 is suspended from the trolley 35. The cockpit 20 is fixed to the trolley 35.

The electric motor 39 is connected to each wheel 31 to drive the wheels.

4 is a block diagram of a new control system that oversees the loading and unloading operations, which are installed on a crane or cockpit. The cockpit 20 of the pottle crane has a longitudinal position indicator 43, a work guide sign 44, a driver work sign 45, a trick guide sign 46, a linkage sign 47, and a control device for controlling such devices. The automatic control panel 41 is impaired.

The purpose of the position detector 42 is to detect the longitudinal position of the crane corresponding to a specific address in the container dump. The automatic control panel 41 is connected to receive the cargo information from the central control room in order to send the various timely signals necessary to perform the work by continuously managing the location of the crane and proceed with the cargo operation.

Typically, the cargo address information given to the crane includes instructions for transporting the container from a given address to another address and these two types of address information are given simultaneously. Therefore, the automatic control panel 41 also acts to supply the central control room with information on the judgment that the control is made according to one of the address information, and the "work completion notice" is to perform the cargo operation commanded at the current position of the crane. It is done upon completion.

The work guide sign 44 serves to display the work guide for the transverse run required to drive the crane to the desired address, as well as the approach and reach guide. Thus, the driver's work display board 45 acts to display the contents of the cargo work ordered by the central control room. The truck guide sign 46 shows only the signals necessary to guide the truck moving forward underneath the crane, and the interlocking sign 47 shows the container's badness only when the crane reaches a specific address identified by the automatic control panel 41. Iii) and releasing, and are configured to continuously indicate the operation of the interlocking member, thereby preventing the driver from erroneously judging an address.

The container handling work management system of the crane is described in FIG.

The central control room 501 functions to transmit a container address command signal and a cargo command signal such as a container number and a command signal.

In this embodiment, the transmission and reception of signals between the central control room 501 and the cockpit are performed by an inductive radio method.

In more detail, the guided wireless method is shortened so that the coil or antenna 502 mounted on the crane moves in parallel to the inductive conductor 520 mounted on the ground.

When the high frequency current modulated by the command signal from the central control room 501 flows through the inductive conductor, a high frequency magnetic field is formed around the inductive conductor.

Accordingly, since the coil 502 located near the induction conductor 520 is connected by high frequency magnetic flux to induce electromotive force across the terminal of the coil, the command signal transmitted from the central control room is the driver of the crane. Is sent to.

Thus, the signal received by the coil or antenna 502 is amplified and demodulated by the receiver 503.

In this embodiment, the address signal and the container defense signal in the container dump are encrypted signals.

The method for determining the container dump address will be described later. The output of the receiver 503, including the container dump address signal and the container number signal, is sent to the container address indicator 506 and the container number indicator 505 mounted on the operator work board in the cockpit via the decoder 504. When sent, the designated container address and container number are indicated by the appropriate labeling device for the example lamp. The driver in the cockpit on the crane manipulates the crane controller 514 to move the crane to the specific address indicated by the container address indicator 506.

In the receiver 503, the encrypted address signal in the cargo command signal is separated and added to the controller 507 to which the encrypted current position signal is applied so that the encrypted address signal is compared with the current position signal.

In order to detect the current position of the cockpit or crane, it is necessary to determine the position of the crane in the container dump and the transverse position of the cockpit above the girder 33.

The detection of the working position of the crane is carried out by using the inductive conductor described above. More specifically, the detection of the working position involves twisting the induction conductor or the transmission line so that the antenna mounted on the crane changes the phase angle of the induced current in the antenna whenever it passes through the twisted portion of the induction conductor. By making it. When a twisted pair type four line system is applied to a twisted transmission line, the transmission line can move more effectively to prevent the effects of external noise induced in the transmission and antenna than the technology of the untwisted palm. It can also be moved to effectively limit the electrical field radiated by the transmission line and antenna.

In order to ensure the effective detection of the crane position as well as the effective transmission of the command signal by the guided radio method, it is necessary to make the crane move straight even if the crane is equipped with rubber tires. For such orbital control, low-frequency current is routed through an inductive conductor embedded in a container dump, and an off-track detector is used to detect an off-track of a crane. The deviation signal generated by this method is converted into a control signal used to control the crane track by a fitness signal converter (not shown).

The control signal thus generated is used to change the number of revolutions of the crane drive motor so that the crane moves along a predetermined track. Then, the crane trajectory can be maintained within ± 100mm from the linear conductive conductor. The transverse position of the cockpit can be mounted by converting the mileage of the cockpit to an angle of rotation. The crane address commanded in this way and the current position of the crane are compared with each other to indicate the transverse direction of the cockpit.

As the crane approaches the designated address, address access and arrival appear on the work order indicator 506.

The determination of the container dump address can be performed automatically by setting a constant mutual step between the container address in the container dump and the transverse position of the crane.

6 shows one embodiment of container placement in a container dump.

For containers of 6.06 meters in length and 2.45 meters in width, one block in the container dump is divided into a plurality of addresses spaced 0.44 meters in the longitudinal direction and 0.4 meters in the transverse direction. In this arrangement, a 12.12 meter long container occupies two addresses. The correlation between the detected location information and the address B _N is as follows.

For 6.06 meters, N = address number (B _N ), × n container

케이싱(casing)For 12.12 meters, N = address number (B _N ) × n +

Casing

In the above formula

N = location number corresponding to address number (B _N )

Referring back to FIG. 5, the current position signal detected by the longitudinal position tower 508 and the transverse position tower 509 is controlled through a waveform shaper 510 and an encoder 511. 507 is supplied. The command signal from the receiver 503 coincides with the position signal of the crane cockpit, and at the same time generates an output used to actuate the work guide marker 512 for the controller 507 bogietemp. At the same time, the output from the controller is also applied to the interlock 513 and thus enables the operation of the spreader manipulator 515.

As a result, the spreader of the crane is lowered to grip and release the container. At the same time as the series of spreader work is completed, the controller 507 and the transmitter 516 are opened to generate an electric signal transmitted as the work completion signal to the central control room 501.

In addition to the new crane management system for handling containers in container dumps as described above, the operator of the crane cockpit receives cargo command signals for each container, performs the commanded container handling and When complete, the work completion signal is automatically sent to the central control room to wait for a new command signal. In the case of an address different from the designated address, the spreading and releasing operation of the spreader is automatically prevented. As a result, the operator can reduce the amount of work and prevent accidents.

These features are indispensable for the automation of container dumps.

Claims (1)

In the container 19 dump, the operator of the crane 18 cockpit 20 performs handling of the container according to the encrypted address command signal and the encrypted container number signal sent from the control room 11,501, and a plurality of predetermined addresses. Is assigned to the place where the container will be located in the container dump, and the address of the pre-determined container is installed in the container dump from the inductive conductor 520 through which low-frequency current flows connected to the high frequency transmitter of the control room 11,501 as one work command signal. The current address of the driver's cockpit is detected by transmitting to the driver's cockpit by the so-called inductive radio system through the inductive conductor 520 through which low frequency current flows and the antenna 502 mounted to the crane. As long as the address matches the detected current address It can handle a scheduled container, and when the work is completed, a work completion signal is sent from the driver's cockpit to the control room, and the crane is guided to move straight along the predetermined track even if the crane is mounted with rubber tires. How to manage container handling work.

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