JPH11278616A - Automatic unloading system and computer readable recording medium for storing automatic unloading program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save the labor of crane work without requiring a special equipment of a high cost. SOLUTION: This system performs the unloading of various kinds of steel plate coils in a coil yard 10, of which the information including three- dimensional position thereof is inputted to a computer 18. In this case, the system is provided with a general storage area 13 provided at each delivery line 12 in the coil yard 10 and for storing steel plate coils 11, a load aligning stage 14 for piling the steel plate coils 11 to be delivered at each delivery line 12, an automatic crane 19 for hoisting the steel plate coils 11 for carrying, and a control device having a computer 18 for controlling the automatic crane 19 and for generating the delivery process in order of delivery of the steel plate coils 11 piled in the generated storage area 13 without moving other steel plate coils.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading yard in which a large number and variety of steel coils are stacked in a coil yard, and the steel coils to be delivered to a processing line or the like are delivered to the loading yard. The present invention relates to an automatic unloading system for performing a procedure for sequentially loading items on a computer to which predetermined unloading conditions are input, and a computer-readable recording medium recording an automatic unloading planning program applied to the system.

[0002]

2. Description of the Related Art In a coil yard in which a large number of steel coils are managed, various large and small steel coils (hereinafter referred to as coils).
Are stored in piles. To quickly take out the required coil from the coil pile and supply it to the processing line (outgoing line), take out the coil to be processed from the coil pile at the night before the scheduled processing, etc. Unloading work such as transfer to the upper part of the mountain is performed.

[0003]

However, the outer diameter,
For unloading work of coils with various widths and types, it is necessary to take into account changes in the processing order in the processing line, weight restrictions on stacked coils, etc., and complicated work relying on human intuition and experience It has become. That is, in the unloading operation of the coil, first, based on the processing schedule of the next day, a person searches around the narrow coil yard one by one for the corresponding coil, and when the coil is found, the processing schedule is added to the coil. Attach the written tag. Next, the crane operator reads the tag and moves it to a place where the coil can be easily taken out during processing the next day. The stacking order and the form of stacking of the coils are empirically determined, and the stacking method differs and the work efficiency changes depending on the person.
Such unloading work is often performed at night after the processing line is stopped, and there is a problem that if the number of coils is large, the work must be performed until midnight.
The present invention has been made in view of such circumstances, and an automatic unloading system that enables labor saving of a crane operation for rearranging coils without requiring special expensive equipment and an automatic unloading system applied thereto. It is an object of the present invention to provide a computer-readable recording medium recording a unloading plan program.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The automatic unloading system described has a computer with its width,
Various kinds of steel coils in the coil yard, in which the data including the diameter and the three-dimensional position are inputted, are unloaded in the computer so that they can be discharged in a predetermined order before discharging the steel coils. An automatic unloading system that performs
A general storage area in the coil yard for storing steel sheet coils provided for each delivery line, a loading area for stacking steel sheet coils to be delivered for each delivery line, and lifting up the steel sheet coils An automatic crane to be transported, and the computer for controlling the automatic crane and generating the procedure for taking out the steel coil to be discharged stacked in the general storage area in the order of discharge without moving other steel coil. A control device. A computer-readable recording medium on which the automatic unloading planning program according to claim 2 is recorded, wherein various types of steel sheet coils in a coil yard whose specifications including its width, diameter, and three-dimensional position are input to a computer. Before unloading the steel sheet coil, a computer reading an automatic unloading planning program that performs unloading in the computer so that the unloading can be performed in a predetermined order using an automatic crane that lifts and conveys the steel sheet coil. A possible recording medium, wherein in the coil yard, a loading line is provided for stacking and arranging steel sheet coils to be unloaded for each unloading line, and the unloading is performed from among the sheet coils in stock in a general storage area. Extracting the steel sheet coil to be extracted for each of the delivery lines, and stacking the delivered steel sheet coil without moving other steel sheet coils, Serial to retrieve the order of the goods issue using an automatic crane, which staked the steel sheet coil to the unloading to the each load alignment field. A computer-readable recording medium recording the automatic unloading planning program according to claim 3 is a computer-readable recording medium storing the automatic unloading planning program according to claim 2, wherein the steel sheet coil to be unloaded is stored on the next day. The steel sheet coil is extracted from the general storage area to the packing place based on the processing schedule.

A computer-readable recording medium recording the automatic unloading planning program according to claim 4 is the computer-readable recording medium recording the automatic unloading planning program according to claim 2 or 3, wherein the storage is released. A unloading plan for transporting the steel sheet coil from the coil yard to the packing place is created by the following procedures (1) to (5). (1) Create a basic unloading table that can quantitatively evaluate whether or not to move for each steel sheet coil in the coil yard and the priority of movement. (2) The respective sets each having the coil arrangement state in the general storage area and the cargo unloading area as elements are obtained, and a direct product set including all combinations of the respective elements of the two sets is calculated. (3) Logical restrictions such as interference conditions between steel sheet coils, restrictions on the height of piles of stacked steel sheet coils, restrictions due to zone divisions, and steel sheet coils that are not to be processed on steel sheets to be processed. The candidate set is obtained by excluding the elements corresponding to the above from the direct product set. (4) For each element of the candidate set, the unloading category, the type of steel sheet coil, the number of moving steel sheet coils,
The evaluation value is calculated using the leveling frequency, the number of storage tiers, and the moving distance of the crane, rearranged in descending order of the evaluation value, and the first element of the candidate set is adopted as an operation procedure,
The result is reflected on the unloading basic table.
(5) The operations (2) to (4) are repeated until there is no movable steel sheet coil based on the updated unloading basic table. A computer-readable recording medium recording the automatic unloading planning program according to claim 5,
A computer-readable recording medium recording the automatic unloading planning program according to any one of claims 2 to 4, wherein, in the coil yard, when stacking the steel sheet coils at the unloading place. A common temporary storage space is provided to be used in the event of a jam, or when there is a steel sheet coil that cannot be placed in the packing area. Claim 6
A computer-readable recording medium on which the automatic unloading planning program described above is recorded, wherein the computer-readable recording medium recording the automatic unloading planning program according to any one of claims 2 to 5, further comprising: When stacking the steel sheet coils in a place, the stacking is performed under the following conditions. (1) When looking at the loading area from directly above, do not place the steel sheet coil so as to protrude from the storage area of the loading area. (2) Adjacent steel coils placed on or in the yard have gaps. (3) The top of the steel sheet coil placed on the uppermost part is within the transportable area of the steel sheet coil of the automatic crane. (4) Depending on the ratio of the diameter (D) to the width (B) of the steel sheet coil, if D / B is less than 2.5, up to 3 stacks, D / B being 2.5 or more and less than 3 In this case, stack up to 2 stacks, and when D / B is 3 or more, stack up to 1 stack.

In the automatic unloading planning program according to the present invention, a computer in which unloading logic is preliminarily incorporated using a coil processing schedule input from a host system and coil data stored in a coil yard. And a person interact with each other to create an automatic coil unloading work plan in a short time. In this way, the unloading operation can be automated by transmitting the instruction command simulated on the computer and confirming the operation completed in time to the crane control device that moves the automatic crane. In the operation of the unloading logic, first, the coil yard is divided into three sections: a general storage area, a loading area, and a common temporary storage area. Next, in the general storage area, coils of various sizes are efficiently stored and taken out. Then, in order to increase the number of stored coils as much as possible while avoiding physical interference between the coils, the coils are classified by width, outer diameter, and weight, and the height when the coils are stacked, the coil processing order, The location of the coil is determined by judging the aspect ratio and the like of the coil. Further, the coils to be processed are arranged intensively in a specific area (loading place). Thereby, it is possible to avoid that the return coil after the processing is completed, the coil newly received from the outside and the coil to be processed are mixed in the same area, and the sorting management of each coil is not complicated.
And flexible management of coil management is aimed at using the common temporary storage place which can hold a coil temporarily. In this way, taking into account the processing order of coils with different external sizes and types, and applying stacking logic that avoids physical interference,
This makes it possible to automate the crane operation when loading the coil to be processed from the general storage area to the loading place.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 is an explanatory diagram of an automatic unloading system according to an embodiment of the present invention, FIG. 2 is an overall flow diagram of an automatic unloading planning program, and FIG. 3 is an explanatory diagram of the operation of the automatic unloading planning program. . FIG. 1 shows an automatic unloading system (automatic unloading device) according to an embodiment of the present invention.
As shown in FIG. 1, a plurality of processing lines (an example of a stocking line) 12 for processing a steel sheet coil (hereinafter referred to as a coil) 11 are provided in a coil yard 10, and each of the processing lines 12 is partitioned. General storage area 1
3, a packing room 14, a common temporary storage 15, a skid 16,
A control device (not shown) having a computer 18 having an automatic unloading planning program 17 and storing three-dimensional position data and the like of the coils 11 stocked in the general storage area 13, and an automatic device driven by an instruction of the computer 18 A crane control device 20 for the crane 19.

The coil yard 10 is a coil storage space in a building for holding and managing a variety of coils 11 having a total length of about 20 m and a width of about 65 m, respectively. Are divided into numbers corresponding to the number. The general storage area 13 is an area for stacking the coils 11 brought into the receiving place by a truck or the like first and waiting. Incoming coil 11
Each time, the specification data including the width, the diameter, the type, and the three-dimensional position where the coil 11 is arranged are input to the computer 18 and stored.

The packing room 14 is provided for placing the coil 11 to be processed on the processing line 12 on the next day on the previous day or the like in advance so that it can be easily taken out by the hanging type automatic crane 19. Area. In this embodiment, since the coils 11 are grouped for each processing line 12, it is not necessary to consider the processing order between the processing lines 12, and the logic for deciding the storage space can be simplified. In addition, since the packing line 14 is provided for each processing line 12, the coils 11 to be processed the next day can be put together. Thus, the next day, processing line 1
A storage space for the return coil from 2 and the coil received from the receiving place is secured in the general storage area 13.

[0010] The common temporary storage space 15 places such a coil 11 when the coil 11 is stuck in the loading space 14 or when there is a coil 11 that cannot be placed in the loading space 14. It is an area used for
The skid 16 is provided with the coil 11 to be delivered to the processing line 12.
And a place for temporarily holding the return coils from the processing line 12 individually.

The computer 18 has an automatic unloading planning program 17 in which stacking logic and unloading logic are incorporated. As a result, based on the machining plan data of the next day and the specification data of each coil 11 inputted from the host system, the coil to be machined (scheduled to be delivered) from the pile of coils 11 held in the general storage area 13 1
A simulation operation for taking out 1 and placing it in the packing place 14 can be performed. The automatic unloading planning program 17 recorded on a computer-readable recording medium such as FD, CD, HD, etc.
The simulation logic for evaluating the quality of the coil arrangement pattern (candidate set) in No. 4 is incorporated, and an appropriate coil arrangement pattern can be selected from each candidate set. The computer 18 is incorporated in a control device (not shown) that manages the automatic unloading system. The control device is configured to receive overall processing schedule data and necessary information from a host computer or the like. I have. Crane control device 20
Operates upon receiving an operation instruction command of the automatic crane 19 selected by the computer 18. In this way, the automatic crane 19 is moved to a predetermined position in the general storage area 13 and transported while the predetermined coil 11 is lifted,
The cargo can be unloaded at a predetermined position of the packing place 14, that is, in a selected coil arrangement pattern.

Next, the operation of the automatic unloading planning program 17 will be conceptually described with reference to the flowchart shown in FIG. 2 and the explanatory diagram of the coil arrangement shown in FIG. First, in step S-1, the outer diameter, length,
The load setting conditions such as weight data, storage position data of each coil, coil processing order data (processing plan data), and restrictions on coil arrangement are input to the computer 18. It is not necessary to input these data at once, and some of them may be input in advance.
FIG. 3 shows an arrangement state of the respective coils 11 in the general storage area 13 and the packing room 14 at each stage, and the computer 18 in FIG.
The arrangement state of each coil 11 in the general storage area 13 and the packing room 14 shown in (a) is stored.

The unloading simulation in the next step S-2 is executed by, for example, the following procedures (1) to (4). A removable coil that satisfies the unloading setting condition from among the piles of coils 11 in the general storage area 13 (FIG. 3)
(B) The coils (shown by diagonal lines) are taken out in the oldest processing order and placed in the loading place 14. Note that the removal of the coil is a simulation operation performed on the computer 18, and the coil 11 is not actually moved. The next coil is selected in the order of the oldest processing from among the coils (coils indicated by oblique lines in FIG. 3C) that can be newly taken out by the calculation of (1). The above operation is repeated until there are no more coils that can be removed. Finally, in the state as shown in FIG. 3D, that is, in a state in which there is no longer any coil that can be taken out in the general storage area 13, the loading simulation of this time is ended.

In step S-3, the result is determined based on the above-described simulation result determination logic. Such determination logic includes, for example, selection of a coil arrangement that minimizes the traveling distance of the automatic crane 19, and the like. That is, the state shown in FIG.
It is possible to select the simulation result (coil arrangement pattern) that minimizes the traveling distance by integrating the traveling distances of the automatic crane 19 necessary to bring the state into the state. In this manner, each simulation result is determined based on the traveling distance of the automatic crane 19 or the like as a criterion. If inappropriate (no), the process returns to the step S-2, and if appropriate (yes), the process returns to the step S-2. -4.

In a final step S-4, an operation instruction command for operating the automatic crane 19 is input to the crane control device 20 based on the suitable simulation result. This allows the automatic crane 19 to properly arrange the coil 11 to be processed in the cargo unloading area 14 with a minimum traveling distance, for example, by the most efficient operation. Therefore, on the day of processing, the coil 11 to be processed on the processing line 12 can be easily taken out from the packing place 14, and the efficiency of coil processing can be improved.

On the other hand, in the case where unloading is carried out without providing a dedicated packing area for each processing line 12 and taking into account only the physical constraint conditions in stacking, the following disadvantages are caused. Indeed, the present invention can overcome such disadvantages. When the processing coil 11 is handled only in the general storage area 13, the coil 11 is placed at the top of the coil general storage area 13 or stacked vertically without considering the processing order. Sometimes. In such a case, since the final delivery order depends on the processing situation of the day, the coil 11 is connected to the processing line 1.
It is difficult to uniquely specify an appropriate loading method for efficiently transporting the second. Furthermore, when various types of coils are mixed, the coils used in other processing lines may be on the coil that is to be processed.
Once the coil is moved to another position, extra operation such as removing the coil occurs, the coil cannot be supplied within the allowable time, and in the worst case, unloading work of the next day occurs before delivery May be.

[0017]

Next, a description will be given of an embodiment in which the procedure of the unloading simulation in the step S-2 is described in more detail using a unloading logic. The procedure using the unloading logic in this embodiment includes the following elements. For each coil in the coil yard,
A basic unloading table as shown in Table 1 that can quantitatively evaluate the movement priority is created based on the data of the coil to be processed.
The unloading basic table is a database set for each coil. Some of these data are determined by the processing schedule of the host system (for example, weight, outer diameter, process, etc.), and others are changed each time the unloading calculation is performed (X:
Y: Z coordinate, workable flag). Therefore, each time the calculation is performed, the basic loading table changes, and the determination or calculation is computer-processed using the changed basic loading table.

[0018]

[Table 1]

A direct product set is formed from a set having the arrangement state of the coil at the movement source as an element and a set having the state of the yard at the movement destination as an element. Delete elements that fall under logical restrictions such as restrictions on the height of the pile of coils to be stacked, restrictions on zone divisions classified by coil width and outer diameter, and coils to be moved under coils that are not to be moved. To create a candidate set. For each candidate set element, the evaluation value is calculated using the unloading classification, coil color (type), number of moving coils, leveling frequency, number of storage stages, and crane moving distance,
Sorting is performed in descending order of the evaluation value, the head element of the candidate set is adopted as an operation procedure, and the result is reflected as data in the unloading basic table. Again based on the new unloading basic table,
Is repeated until there is no movable coil. If there are no more movable candidates on the way, the operation can be continued by performing an operation such as moving the coil that is in the obstacle outside the coil yard due to the intervention of the operator.

The present system realizes the following functions (1) and (2) to formulate a unloading plan using the automatic crane 19. It must be able to clear and store restrictions such as coil width, outer diameter, weight, height restrictions, no interference between coils, and no disruption of coil stacking. The coil is moved from the mountain to the plurality of processing lines 12 in a predetermined processing order using the automatic crane 19. For this purpose, the unloading of the pile on which the coil 11 is loaded is completed in advance by using the automatic crane 19 within the time determined. In the coil yard 10, storage of the coils 11 received from the truck, and transfer of the coils 11 to a plurality of processing lines 12 are performed.
Of the remaining coil after the completion of machining work (return coil)
Perform work such as storage. These operations are performed by the automatic crane 1
9 in a timely manner so that there is no waiting for work. The ability to perform interrupt processing associated with the change of the machining order on the day.

The candidate set is generated by the following procedures. The number of coils as the movement source and the number of yards as the movement destination are counted and set as sets A and B, respectively. In the following items, it is known in advance that the evaluation of certain candidate moves (elements of the set) is zero, so that such elements can be excluded in advance at the time of counting up the coil or the place. A direct product set (A × B) is generated from a set A of coils as a source and a set B of a place as a destination. The unloading operation is expressed as a set of one coil and one storage space. Here, a direct product of a set A of coils and a set B of places (a brute force combination of two sets) is obtained. From each element of the direct product set (A × B), the interference condition of the coil,
A candidate set is created by removing elements that are caught by a height limitation, a limitation by zone division, a logical limitation such as a coil not to be moved being on a coil to be moved, and the like. Then, the candidate set is evaluated for each element, ranked, and rearranged accordingly. After rearrangement, the next transport schedule is made using the first element. The result is registered as data in the basic unloading table which is the basis of the unloading plan.

The basic loading table includes, for example, elements of a loading section, a coil color, the number of moving coils, a leveling frequency, or a standardization frequency, a number of storage yards, and a crane moving distance. The color of the coil refers to a color representation of the positional relationship between the coil not to be processed and the coil to be processed by type as shown in Table 2. For example, the color of the coil stored in the computer 18 is And does not mean that the coils are actually color-coded. The unloading section indicates a section of the unloading operation that differs depending on the color of the coil, and specifically refers to the operations (1) to (3) shown in Table 3. The leveling frequency is one of the evaluations for the candidate hand when the destination place is the general storage area. The standardized frequency is one of the evaluations for the candidate hand when the destination yard is a common temporary yard. The number of steps in the yard is one of the evaluations for the candidate hand when the destination yard is a general storage area, and refers to the maximum number of stackable coils. The crane moving distance is one of the evaluations for the candidate hand, and refers to the distance between the current position of the crane and the destination of the candidate hand.

[0023]

[Table 2]

[0024]

[Table 3]

Such an unloading basic table is automatically calculated and generated using the automatic unloading planning program 17. The unloading plan is created by the following procedures (a) to (n) while interacting with the computer 18. (A) Obtain coil processing schedule data and storage schedule data from a host computer (computer). (B) Among the processing scheduled data, data to be unloaded at night is determined. (C) Create scheduled data (such as the outer diameter of the return coil) from the scheduled machining data. (D) Display the unloading start setting screen on the monitor of the computer 18. If it is necessary to correct the processing schedule data on the unloading start setting screen, correct it. The contents of correction are change of order, (replacement of slip number), addition, deletion, selection of processing line, and suspension. (E) Arrange the place of the coil to be processed the next day. At the end of the operation, it is natural that the coil to be processed does not remain in the processing load unloading area 14, but in some cases, the remaining coil may be generated. Therefore, at the time of drafting the unloading plan, it is determined how to treat the remaining coil in each of the processing assortment sites 14. The options are: The remaining coils are moved to the common temporary storage area 15 or the general storage area 13, and the processing unloading area 14 is temporarily cleared. The processing is postponed the next day, leaving the remaining coils as they are. However, in this case, the processing schedule for the next day is only the remaining coils. With respect to the remaining coils in the processing packing room 14, a payout procedure is planned. (F) Based on the physical restriction conditions of the coil place shown in Table 4, the processing packing room 14 is once cleared. (G) Classify the coil to be processed based on the place restriction of the coil. Here, the constraints on the stacking of coils
Sorting is performed by the elements of width, length, coil interference condition, height limit, and coil diameter B divided by coil width B (D / B). Based on this condition, a coil to be placed in the processing cargo storage area 14 or the common temporary storage area 15 is determined as a temporary storage area. Table 4 shows an example of such physical constraints.

[0026]

[Table 4]

It should be noted that the number of coils that can be stacked based on each range of D / B as shown in Table 4 is obtained by stacking coils piled up experimentally and empirically under various conditions. It is determined by experimentally determining the stability of the mountain and the balance of the force applied to each coil. In addition, the physical constraint shown in Table 4 has a condition that the top of the coil placed at the top is located below the coil transfer area where the automatic crane 19 runs.

(H) A stowage plan for the processing packing room 14 is made. A coil to be transported to a specific processing packing line 14 is selected. (I) Create a state table of the loading positions and coils as a basis for the unloading plan. (J) The final loading state and the unloading procedure for the unloading processing unloading place 14 are created using the automatic unloading planning program 17. (K) The presence or absence of jamming is determined by the procedure of (l), and if there is, the process proceeds to (d) to change the schedule of machining plan data, and if not, the process proceeds to (m). (L) After completion of the automatic unloading schedule calculation (plan),
The following procedure is used to check whether a place for storing and returning coils is secured. As a result of the check, if it is not ensured, the operator is notified that the unloading plan has reached a dead end, and the unloading plan is redone. If a place for storing and returning coils is secured, an operation to complete the unloading plan is performed. That is, the following three steps (~
In), check whether enough locations are available for placing the incoming and return coils the next day. When the storage and return coils are stacked in a predetermined zone of the general storage area 13, it is checked whether the shortage of the storage space is zero in each zone. In the above case, if a sufficient storage space is not secured, the shortage of the storage space is calculated, and it is checked whether the shortage can be solved by using the common temporary storage space 15. If a sufficient storage space is not secured even in the above case, the shortage of the storage space is calculated, and the shortage is obtained by using the storage space outside the zone, that is, by interchanging the storage spaces between the zones. Check if it can be resolved. If it is not possible to secure a place for storing and returning the coils in the above three stages, the operator is notified that the unloading plan has reached a dead end, and the unloading plan is restarted. (M) It is determined whether or not the coil place is secured, and if it is secured, the process proceeds to (n). (N) The transfer work data is created from the determined unloading procedure, and the automatic crane 19 is created in accordance with the transfer work data.
Drive.

The embodiment of the present invention has been described above.
The present invention is not limited to these embodiments, and all changes in conditions without departing from the gist are within the scope of the present invention. For example, in the present embodiment, specific physical constraints are adopted as unloading logic, but the present invention is not limited to only those set numerical values.

[0030]

According to the automatic unloading system according to the first aspect and the computer-readable recording medium on which the automatic unloading planning program according to the second to sixth aspects is recorded, the unloading is performed for each unloading line in the coil yard. Since a loading area in which steel sheet coils can be stacked and arranged side by side is set, it is possible to envisage a procedure of preliminarily selecting and arranging only coils to be processed. As a result, a coil that is not to be processed and a coil that is to be processed are prevented from being mixed with each other, so that the subsequent journalizing operation of the coil and the transfer to the delivery line can be efficiently performed. Next, the steel sheet coils to be delivered from the steel sheet coils in stock in the general storage area are extracted for each delivery line, and the stacked steel sheet coils are moved using an automatic crane without moving other steel sheet coils. Steel coils are stacked in each loading area so that they can be taken out in order of delivery, so there is no unnecessary movement in crane operation and coils can be rearranged efficiently, and special expensive equipment is required. Labor can be saved. In particular, in the computer-readable recording medium recording the automatic unloading planning program according to claim 3, the steel coil to be unloaded is extracted from the general storage area to the unloading place based on the processing schedule of the next day. Therefore, it can be arranged neatly on the day before the processing is scheduled.

A computer-readable recording medium on which the automatic unloading planning program according to claim 4 is recorded comprises an element of a unloading procedure in which a unloading plan for transporting a steel sheet coil from a coil yard to a packing place is possible. It is created by setting a candidate set, adopting the one with the highest evaluation value among the candidate sets, and reflecting this result in the basic unloading table each time. The unloading plan can be created more efficiently. In particular, in a computer-readable recording medium that records the automatic unloading planning program according to claim 5, in the coil yard, if a sheet jam occurs when stacking the steel sheet coils at the loading place, or There is a common temporary storage area that can be used when there is a steel sheet coil that cannot be placed in the alignment area, so it is possible to temporarily hold such a coil, making it possible to smoothly move the coil throughout the coil yard. Can be done. Claim 6
In the computer-readable recording medium on which the described automatic unloading planning program is recorded, in stacking of the steel sheet coil to the unloading place, specific physical constraints are set in advance and stacking is performed. Therefore, a physically stable coil arrangement can be realized, and the coil can be safely and efficiently taken in and out.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an automatic unloading system according to an embodiment of the present invention.

FIG. 2 is an overall flowchart of an automatic unloading planning program.

FIG. 3 is an explanatory diagram of an operation of an automatic unloading planning program.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Coil yard 11 Coil (steel sheet coil) 12 Processing line (shipping line) 13 General storage area 14 Packing area 15 Shared temporary storage area 16 Skid (for shipping and return coil) 17 Automatic unloading planning program 18 Computer 19 Automatic crane 20 Crane Control device

Continued on the front page (72) Inventor Shuichiro Kawashima 46-59, Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka Prefecture (72) Kazuhito Uchiyama Inventor Kazuhito Uchiyama 46-59, Ohara Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture New Nippon Steel Corporation Engineering Business Unit (72) Inventor Tsuyoshi Yoshida 46-59 Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka 59 Nippon Steel Plant Design Co., Ltd.

Claims (6)

[Claims] 1. A variety of steel coils in a coil yard, in which data including its width, diameter, and three-dimensional position are input to a computer, are discharged in a predetermined order before the steel coils are discharged. An automatic unloading system for unloading in the computer so as to be able to perform unloading in the coil yard and a general storage area for storing steel sheet coils provided for each unloading line, and unloading for each unloading line. A loading area for stacking steel sheet coils, an automatic crane that lifts and transports the steel sheet coils, and controls the automatic crane to stack the steel sheet coils to be unloaded from the general storage area to another steel sheet. An automatic unloading system, comprising: a control device having the computer that generates a procedure for taking out goods in order of delivery without moving a coil. 2. A variety of steel coils in a coil yard, whose specifications including its width, diameter, and three-dimensional position are input to a computer, lift the steel coils before releasing the steel coils. A computer-readable recording medium that records an automatic unloading plan program that performs unloading in the computer so that the unloading can be performed in a predetermined order using an automatic crane that conveys the product. A loading line is provided for stacking and arranging the steel sheet coils to be delivered every time, and from the steel sheet coils in stock in the general storage area, the steel sheet coils to be taken out are extracted for each of the delivery lines and stacked. In order that the steel sheet coil to be unloaded can be taken out in the order of unloading using the automatic crane without moving the other steel sheet coils, it is required that each of the cargo unloading areas be forwarded. Computer readable recording medium recording an automatic load repeatedly planning program, characterized in that the staked steel sheet coil to goods issue. 3. The computer according to claim 2, wherein the steel sheet coil to be unloaded is a steel sheet coil extracted from the general storage area to the unloading area based on a processing schedule of the next day. A readable recording medium. 4. The unloading plan for transporting the outgoing steel sheet coil from the coil yard to the packing place is created by the following procedures (1) to (5).
A computer-readable recording medium on which the automatic unloading planning program described above is recorded. (1) Create a basic unloading table that can quantitatively evaluate whether or not to move for each steel sheet coil in the coil yard and the priority of movement. (2) The respective sets each having the coil arrangement state in the general storage area and the cargo unloading area as elements are obtained, and a direct product set including all combinations of the respective elements of the two sets is calculated. (3) Logical restrictions such as interference conditions between steel sheet coils, restrictions on the height of piles of stacked steel sheet coils, restrictions due to zone divisions, and steel sheet coils that are not to be processed on steel sheets to be processed. The candidate set is obtained by excluding the elements corresponding to the above from the direct product set. (4) Unloading classification for each element of the candidate set,
Calculate the evaluation value using the type of steel coil, the number of moving steel coils, the leveling frequency, the number of storage stages, and the moving distance of the crane, sort the evaluation values in descending order, and use the top element of the candidate set as the operating procedure. And the results are reflected in the unloading basic table. (5) The operations (2) to (4) are repeated until there is no movable steel sheet coil based on the updated unloading basic table. 5. A common use in the coil yard when the steel sheet coil is clogged at the packing place or when there is a steel sheet coil which cannot be placed in the packing area. 3. A temporary storage space is provided.
A computer-readable recording medium on which the automatic unloading planning program according to any one of Items 4 to 4 is recorded. 6. The automatic unloading operation according to claim 2, wherein the step of stacking the steel sheet coils in the loading area is performed under the following conditions. A computer-readable recording medium that records a planning program. (1) When looking at the loading area from directly above, do not place the steel sheet coil so as to protrude from the storage area of the loading area. (2) Adjacent steel coils placed on or in the yard have gaps. (3) The top of the steel sheet coil placed on the uppermost part is within the transportable area of the steel sheet coil of the automatic crane. (4) Depending on the ratio of the diameter (D) to the width (B) of the steel sheet coil, if D / B is less than 2.5, up to 3 stacks, D / B being 2.5 or more and less than 3 In this case, stack up to 2 stacks, and when D / B is 3 or more, stack up to 1 stack.