JP2606906B2 - Method of rearranging the transfer order of workpieces on the line - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a method of rearranging the order of transporting a work on a line, and more particularly, to a method of transferring a work carried out from a painting line serving as a first line. The present invention relates to a transport order rearranging method for transporting a vehicle in an optimal order toward a second assembly line.

[Conventional technology]

The manufacturing process of the vehicle in the factory, in each process,
A plurality of types of vehicles are often manufactured on the same line, and in recent years, in particular, with the increasing use of vehicle types and specifications (grades), the types of vehicles manufactured on the same manufacturing line have been increasing.

By the way, the production of vehicles in the factory consists of, for example, a plurality of production lines such as a painting line and an assembly line, and performs good production management in each of these lines.
In order to improve the work efficiency of the whole factory, it is necessary to rearrange the transfer order at each change of each line so that the optimum transfer order of vehicles according to each production line is optimally combined. . Especially in the assembly line of vehicles,
It is necessary to send a vehicle having a high degree of difficulty in assembling and a vehicle having a low degree of difficulty in assembling at an appropriate frequency to level the work. This is because, in an assembly line, a vehicle with a high assembly difficulty takes a longer time to assemble than a vehicle with a low assembly difficulty. It is because it falls. In addition, even when vehicles that require the same parts to be assembled are continuously put into the assembly line, work is temporarily concentrated on a work station where the parts are assembled, resulting in a work efficiency of the entire assembly line. Decrease.

For this reason, as shown in FIG. 12, between the vehicle assembly line (1) and the production line located upstream of the vehicle assembly line, generally the painting line (2), the vehicle is carried out from the painting line (2). The incoming vehicle (a) is temporarily stored for each desired group, and thereafter, the vehicle (a) located at the head of each group
(B) The most suitable assembly line from (1)
There are provided a plurality of rows of storages (3) for charging the vehicles, and by the operation of the storages (3), the vehicles carried out from the painting line are rearranged in a transport sequence suitable for the assembly line. . Incidentally, (4) in the figure is a carry-in traverser for storing the vehicle unloaded from the painting line (2) in a desired storage (3), and (5) in the figure.
Unloads a desired vehicle from the vehicles (a) located in the first row (head) of each storage (3), and assembles the assembly line (1)
This is an unloading traverser for loading into

By the way, the method of storing the vehicle (a) in each storage (3) is such that the type of the vehicle (a) to be stored is determined in advance for each storage (3), and the vehicle (b) is carried out from the painting line (2). The coming vehicle (a) is sequentially stored in the storage (3) corresponding to the vehicle (a). or,
As a method of determining the order of loading the vehicles (a) from each storage (3) toward the assembly line (1), a periodic table in which the storage numbers of the vehicles (a) are periodically written is created in advance. The worker operates each storage (3) according to the periodic table, and mounts the vehicle (b) on the assembly line (1).
Had been thrown in. Note that the vehicle loading sequence in this sequence table satisfies various loading constraints (for example, prohibition of continuous loading of the same specification vehicle) determined by a request from the assembly site, and the loading ratio of the vehicle (a). Are produced so as to substantially match the production ratio of each specification vehicle within a certain period specified by the production plan.

However, since the contents of this order table are fixed and prepared in advance, when the input restriction condition of the vehicle (a) changes, an appropriate vehicle input order is quickly responded to the change. There is a drawback that it is not possible to determine the order, and it is not possible to set a detailed vehicle insertion order in consideration of a change in the number of stored vehicles (a) in each storage (3).

For this reason, conventionally, as a method for determining the input of the vehicle (a) stored in the storage (3) to the assembly line (1) according to the current situation of the assembly line (1), for example, Japanese Patent Application Laid-Open No. 61-160369 proposes a "method of rearranging the transfer order of a vehicle to an assembly line". In this method, the vehicle (a) supplied from the coating line (2) is identified, the vehicle (a) is stored in a storage (3) corresponding to the type of the vehicle (a), and then the assembly line (1) is stored. ), The transfer order of the vehicle (a) serially conveyed to the assembly line (1), the number of vehicles (a) stored in the storage (3), and the like. In consideration of the above, the optimal vehicle (a) to be put into the assembly line (1) from the storage (3) is sequentially calculated in real time, and the vehicle (a) obtained thereby is calculated from the corresponding storage (3) from the assembly line (1). It is designed to be sequentially input to 1).

Another example of the method of using the storage (3) to rearrange the transportation order of the vehicle (a) according to the current situation is as follows.
Japanese Patent Application Laid-Open No. 61-207277 discloses a "method of rearranging the transfer order of works on a line". This rearrangement method selects a vehicle group corresponding to the number of storages from the reference leading vehicle (A) for the vehicle (A) conveyed on the painting line (2), and selects a vehicle group having a higher provisional priority from among these. Perform the operation of determining the vehicle (a) as the first take-out order;
Next, the number of vehicle groups corresponding to the number of storages is set from the reference leading vehicle (a) excluding the ranked vehicle (a), and the vehicle (a) having the higher temporary priority is set as the next priority among the groups. The operation of sequentially determining is repeatedly performed a predetermined number of times, and the order of taking out is given to each vehicle (a). In this way, the ranked vehicles (a) conveyed on the coating line (2) are stored in each storage When the vehicle (b) is stored in (3), the vehicle (b) having a higher rank than the take-out rank of the vehicle (b) is selectively stored toward the storage (3) stored in the last tail. is there. When the vehicle (a) is put into the assembly line (1) from the storage (3), the vehicle (a) is sequentially sent out from the storage (3) to the assembly line (1) in accordance with the above-mentioned order of taking out. .

[Problems to be solved by the invention]

As described above, as in the method of rearranging the transfer order of the vehicle to the assembly line, if the vehicle type that is the optimum combination of the vehicle transfer order in the assembly line is sequentially calculated in real time using a predetermined evaluation function calculation formula, Even if there is a change in the restricting condition of the vehicle (a) into the assembly line (1), it is possible to respond quickly. However, this method requires that each storage (3)
The types of vehicles (A) that can be rearranged by this method are the same as the number of storages (3) because the types of vehicles stored in the vehicle are fixed in advance. In the case of flowing, there is a problem that this method cannot cope. Further, when the ratio of each type of the vehicle (a) flowing on the line fluctuates greatly temporarily, the vehicle (a) stored in each storage (3) is shifted to only a part of the storage (3). There was also a problem that this could not be absorbed well.

Further, as in the above-described method of rearranging the transfer order of the work on the line, for the vehicles transferred on the painting line, a vehicle having a higher temporary priority is selected from among a group of vehicles corresponding to the number of storages. Take out order, and then select a vehicle group of the number corresponding to the number of storages except for the ranked vehicle, repeat the operation of sequentially determining the vehicle with a higher temporary priority as the next order from among these, If a vehicle is assigned a take-out order, each vehicle is stored in a storage according to the order, and a vehicle is put into an assembly line according to the order at the time of unloading, it is not necessary to fix the type of vehicle for each storage. However, in this method, the order of taking out the vehicles (a), which can be determined by repeating the above operation, is determined from the same number of vehicles as the number of storages (3). Because there are few choices, the types of vehicles that can be rearranged (a)
The number is slightly more than the number of storages (3). Therefore, in the case of this method, too, various types of vehicles (a)
, There was a problem that it was not possible to respond.

[Means for solving the problem]

A plurality of rows of storages for temporarily storing the work are provided between the first line and the second line, and the work conveyed from the first line is stored in a desired storage by a carry-in traverser. Among the stored works, a desired work is unloaded from the storage by the unloading traverser and is input to the second line, whereby the transfer order of the work is changed between the first line and the second line. In the method, an unloading traverser for unloading the work from the plurality of rows of storages is provided with a retreat space for temporarily storing the work unloaded from the storage without inputting the work to the second line. When a work is carried in, a production ratio for each type of work is obtained based on data of hundreds of works currently flowing on the first line. The storage to be used is determined for each type in accordance with the type, and the incoming work is loaded into the storage corresponding to the type, and when unloading the work from the storage, hundreds of works currently flowing on the first line are taken out. Based on the production ratio for each type of work obtained from the data of the above, out of the works in the storage and the retreat space which can be currently carried out, the work take-out priority of the work optimal for leveling the work of the second line is determined. The work located in the first row or the evacuation space of the storage corresponding to this priority is taken out by the unloading traverser and put into the second line, and the work located in other than the first row is placed in front of it. A certain work is evacuated to the evacuation space, the work is carried out, and is put into the second line.

[Action]

As described above, when a work is loaded into the storage, the type of work corresponding to each storage is determined according to the production ratio at that time, and when the work is unloaded, the work that can be unloaded is selected again from the work that can be unloaded. By deciding the priority of the unloading work according to the ratio, the loading and unloading of the work suitable for the production ratio for each type of the work at that time is always performed. In addition, by providing a retreat space in the unloading traverser and enabling unloading of works other than the first row of each storage, when unloading the work from the storage, the optimum work can be selected from a number equal to several times the number of storages. This allows the user to make a selection.

〔Example〕

FIG. 1 is a schematic view showing the overall configuration of the present invention, in which (10) is a coating line, (11) is an intermediate coating inspection outlet in the middle of the coating line (10), and (12) is a coating line outlet. , (1
3) is a storage for temporarily storing vehicles carried out from the painting line (10). This storage (13)
In the case of this embodiment, the storages (13) capable of storing six vehicles are arranged in parallel in six rows.
In the following description, the individual storages (13) will be referred to as No. 1 lane, No. 2 lane,... (14) is an assembly line provided downstream of the painting line (10), (15) is an assembly line entrance, and (16) is a vehicle lifting section in the assembly line (14). (17) is a carry-in traverser for carrying the vehicle unloaded from the painting line (10) to one of the lanes of the storage (13);
Reference numeral 8) denotes an unloading traverser for putting vehicles stored in each lane of the storage (13) into the assembly line (14). This unloading traverser (18) has storage (13)
An evacuation space (19) is provided for temporarily evacuation of only one vehicle taken out of any one of the lanes without putting it in the assembly line (14). It is also possible to install a plurality of evacuation spaces. (20)
A production instruction device (ALC) that controls the entire production line including the painting line (10) and the assembly line (14), (21)
Is a coating production instruction device for controlling the coating line (10). (22) is storage (13) and both traversers (17)
A storage control panel for controlling (18), (23) a hanger control panel for controlling a vehicle lifting hanger in the vehicle lifting section (16), (24) a storage control panel (22)
And a storage management device that controls the hanger control panel (23), (25) a display of the management status by the storage management device (24), and necessary data from the assembly line (14) side to the storage management device (24) And (26) an alarm that is activated when an abnormality occurs in control by the storage management device (24).

In the above configuration, the intermediate coating inspection data (a) is output from the intermediate coating inspection outlet (11), and the actual coating B / O passing data (b) and the coating B / O are canceled from the coating line exit (12). The actual data (c) is the painting production instruction device (21) and
The data is sent to the storage management device (24) via the ALC (20). Further, the storage management device (24) obtains the data from the coating line (10), and obtains the console (25)
The operation status monitoring signal (d) is output to the assembly line, the assembly L / ON passing result data (e) from the assembly line entrance (15), the assembly L / ON cancellation result data (f) from the console (25), The hanger control panel (23) also provides hanger lifting data (g)
To obtain data on the state of insertion of the vehicle into the assembly line (14). When the empty process instruction signal (h) is output from the console (25), the empty process instruction signal (h) is sent to the hanger control panel (23) via the storage management device (24).

In this way, when the storage management device (24) receives the data of the vehicle currently flowing on the painting line (10), the order of loading and unloading the vehicle storage (13) to each lane is based on this data. The order is determined, and thereafter, each traverser control signal (i) is output to the storage control panel (22). When the storage control panel (22) accurately controls the loading / unloading traversers (17) (18) and the storage (13) according to the traserver control signal (i), the storage control panel (22) sends the storage management device An instruction forward signal (j) is output toward (24), and the above operation is repeated thereafter. If control is impossible, an equipment abnormality signal (k) is output, and the storage management device (24) outputs an alarm. Toward (26), an equipment abnormality signal (k) is output to inform the operator that the transfer order rearrangement is inconvenient.

In the case of this embodiment, the data sent from the intermediate coating inspection exit (11) to the storage management device (24) from the coating line (10) is the data of the vehicle 140 vehicles before the vehicle reaching the carry-in traverser (17). 5 from the painting line exit (12)
The data of up to 6 units is sent, and the storage management device (24)
Controls the loading and unloading of vehicles to and from each lane of the storage (13) based on data from 140 vehicles before reaching the loading traverser (17) and data set in advance. is there. In addition, data is obtained from both the intermediate coating inspection exit (11) and the coating line exit (12) of the coating line (10) after the intermediate coating process of the coating process is completed and before the coating process is completed. This is because the addition and withdrawal of the vehicle is slightly performed. Further, an iron plate card reader is used for reading vehicle data at the painting line exit (12) and the assembly line entrance (15).

Next, in the above configuration, the storage management device (24)
A description will now be given of a loading logic when the loading traverser (17) is controlled to load a vehicle into each lane of the storage (13).

First, in this embodiment, as shown in the explanatory diagram of FIG. 2, vehicle data for 140 vehicles obtained from the painting line (10) is
There are 98 mini vehicles (hereinafter referred to as model I), 42 small vehicles (hereinafter referred to as model II), and the breakdown of the specifications of model I (hereinafter referred to as options) is 17 for 5 door (A) , 45 cooler cars (B), 30 torque converter cars (C), 21 specially-designed cars No. 1 (D), 9 4WD cars (E), specially-designed cars N
o.2 (F) is two cars, and the breakdown of the option of car type II is also as shown in FIG. It is also assumed that vehicles have been stored in the lanes of the storage (13) in the arrangement shown in FIG.

In this state, first, as shown in FIG. 2, weights previously quantified are given to the vehicle types I and II and the respective options (A), (B), (C). The weight is a numerical value of the degree of influence of the vehicle on the leveling of the assembly line (14) when the vehicle is put into the assembly line (14). Has a large weight, and the weight is reduced in the order of 5 door (A), cooler car (B), torque converter car (C), and the like.
Next, the number of the vehicle types I and II is multiplied by the respective weights to obtain the total weight number of both vehicle types, and the number of storages (13) used in each lane of the storage (13) is determined based on the ratio of the weight numbers. In the case of this calculation, the vehicle type I is 6 lanes x 98/140 = 4.2 → 4 lanes The vehicle type II is 6 lanes x 42/140 = 1.8 → 2 lanes.

Next, the number of options for each model is multiplied by the weight of the option, and the lane to be used is determined for each option in descending order of the numerical value, and the model and option determined for each lane are set as fixed values for the lane. . That is, in this calculation, the option (A) is 10
2, Option (B) is 225, Option (C) is 120,
The option (D) is 63, the option (E) is 18, the option (F) is 2, and the vehicle type I is given 4 lanes.
IA, No. 4 lane as IB, No. 5 lane as IC, and No. 1 lane as ID. In the same manner as above, for vehicle type II, No. 2 lane is set to II B and No. 3 lane is set to II B.
IIC (state in FIG. 3).

In this way, when the fixed value for each lane in this calculation is determined, then the vehicle to be loaded into any lane by the loading traverser (17) (the type of this vehicle is (For example, IIB) and the fixed value of each lane are sequentially compared, a carry-in value for each lane of the carry-in vehicle (IIB) is given, and the carry-in vehicle is carried into the lane with the largest carry-in value. . The carry-in value is obtained by adding the enrollment value of each lane, the lane fixed similarity value, and the last vehicle similarity value. First, the enrollment value is calculated as follows: enrollment value = maximum number stored in each lane−enrollment number (however, enrollment value =
In the case of 0, the carry-in value is assumed to be −9999), which means the number of vehicles that can be carried into each lane at the present time, and the enrollment value = 0, that is, if the lane is full, the carry-in value is − 9999 is set to prohibit the carriage of vehicles.

Next, as shown in the explanatory diagram of FIG. 4, the lane fixed similarity value compares the carried vehicle IIB with the fixed value of each lane, and if there is the same code, adds the weight for the same code. , The value is multiplied by a coefficient IA (IA = 10). In this calculation, the lane fixed similarity value is 0 for No. 1 and No. 2 On the other hand, since IIB matches, the lane fixed similarity value is (10+
5) × 1A = 150.

Next, as shown in the explanatory diagram of FIG. 5, the last vehicle similarity value compares the incoming vehicle IIB with the last vehicle in each lane.
As described above, when there is the same code, the weight for the same code is added, and the value is added to the coefficient IB (IB = 1).
Is multiplied by

After the carry-in value of each carry-in vehicle for each lane is calculated in this way, the carry-in vehicle is carried in the lane where the carry-in value is the maximum, and one carrying-in operation is completed. After that, every time a carry-in vehicle is carried to the carry-in traverser (17), the above series of calculations are performed to store the vehicles sequentially in each lane.

FIG. 6 shows a flowchart of the above-described series of loading logic. That is, in step (30), the number of lanes used for each vehicle type is determined from the production ratio of the vehicle type,
In step (31), the lane to be used for each option is determined, and in step (32), a fixed value is assigned to each lane.
Next, in step (33), the enrollment value of No. 1 lane is calculated,
In step (34), it is determined whether or not the enrollment value is 0,
If not, the enrollment value is set as the carry-in value in step (35). When the enrollment value = 0, the carry-in value = -9999 in step (36). Next, in Step (37), the incoming vehicle is compared with the fixed value of No. 1 lane, and Step (38)
It is determined whether or not there is the same code. If there is the same code, in step (39), a value obtained by adding the lane fixed similarity value to the carry-in value is set as a new carry-in value. Next, in step (40), the incoming vehicle is compared with the last vehicle in the No. 1 lane, and it is determined in step (41) whether or not the same code is found. 42)
A value obtained by adding the last vehicle similarity value to the above-mentioned carry-in value is set as a new carry-in value. Then, in step (43), it is determined whether or not the calculation after step (33) has been performed for all lanes. If not, the next lane, that is, N
o. Perform the above operation for 2 lanes. When the carry-in values for all the lanes for the carry-in vehicle are calculated in this way, in step (44), the carry-in vehicle is carried in the lane with the largest carry-in value, and one carry-in logic is terminated. .

Next, as described above, the vehicles stored in each lane of the storage (13) in a state of being sorted according to the production ratio at that time are unloaded from each lane by the unloading traverser (18), and are assembled from the assembly line (14). ) Will be described below.

First, in order to carry out vehicles from each lane of the storage (13), vehicles at different intervals are inserted into the assembly line (14) at different intervals.
4) It is determined whether or not the leveling is to be performed. Next, from the vehicles currently stored in the storage (13), the vehicles that can be carried out, usually the vehicles located at the tip of each lane, are assembled. The vehicle most suitable for leveling the line (14) is selected and this vehicle is unloaded from the desired lane of the storage (13). In the case of the present invention, since the unloading traverser (18) is provided with a retreat space (19), in the present invention, the unloading vehicle is selected from a total of 12 vehicles in the first and second rows of each lane. Decisions can be made.

Next, the method of determining the order of unloading is described. In the present invention, first, which type of vehicle is to be unloaded, and in this embodiment, an unloading pattern of which type of vehicle I or II is to be unloaded is determined. A determination is made for each of the options equipped on the determined vehicle type to determine which option-equipped vehicle is suitable for leveling.

In addition, in order to determine the order of unloading for each vehicle type and each option, it is necessary to calculate in advance the compliance interval for the vehicle type and option, that is, the insertion interval that must be observed in order to measure the leveling. First, a method of determining the compliance interval will be described.

First, the compliance intervals for each model are Minimum interval = Standard interval is rounded down to the nearest decimal point Maximum interval = Minimum interval (when standard interval is an integer) Minimum interval + 1 (when standard interval is a non-integer).

The compliance interval for each option is Minimum interval = [standard interval -1] or [standard interval x 1 (1-
KA)] is rounded down to the decimal point. Maximum interval = [standard interval + 1] or [standard interval x 1 (1 +
KA)] shall be rounded to the nearest decimal (KA = 0.2).

Next, a method of determining a carry-out vehicle type that determines a carry-out pattern of a vehicle type while maintaining the compliance interval determined as described above will be described.

First, in this method, a pattern value is given to a target vehicle type, in this embodiment, vehicle types I and II, and the vehicle type with the minimum pattern value is set as the current carry-out vehicle type. This pattern value is a value obtained by adding a difference from an ideal (standard interval), a difference from the minimum interval, and a difference from the maximum interval.

The difference from the ideal is, for example, for car II,
As shown in the graph of FIG. 7, data is now input.
Assuming that 140 units were unloaded in sequence, the horizontal axis indicates the unloading order, and the vertical axis indicates the unloading number.If the relationship between the two is ideal, a straight line will be obtained as shown by the dashed line in the figure. As shown by the solid line in the figure, the shape becomes stepwise. Then, when the relevant vehicle type currently being calculated is unloaded by the unloading operation of this time, the degree of departure from the ideal state is indicated. It is.

Also, the difference from the minimum interval is to determine whether or not the current interval of the corresponding vehicle type has reached the minimum interval, and if not, how many more times to carry out and reach the minimum interval. It shows. That is, if the vehicle type does not reach the minimum interval, the vehicle type does not need to be carried out this time, so the degree is quantified, and the calculation method is as follows. However, if it is negative, it is set to 0.

Also, the difference from the maximum interval means that when the current type interval of the other vehicle type is increased by +1 by carrying out the corresponding vehicle type by the current unloading operation, if the interval of the other type type exceeds the maximum interval, It is a numerical value that exceeds the maximum interval, and the calculation method is However, if it is negative, it is set to 0.

Then, a pattern value for each vehicle type is calculated using the above three formulas, and the vehicle type having the smallest pattern value is set as a carry-out pattern.

FIG. 8 is a flowchart showing the above-described series of operations. That is, in step (50), the difference from the ideal of the corresponding vehicle type is calculated, and this value is first used as a pattern value. Next, in step (51), [current interval <minimum interval] is determined. If YES, a value obtained by adding the difference from the minimum interval to the pattern value in step (52) is set as a new pattern value. . Next, in step (53), [current interval of other vehicle type + 1> maximum interval of other vehicle type] is determined, and in the case of YES, the difference from the maximum interval is added to the pattern value in step (54). This is used as a new pattern value. next,
In step (55), it is determined whether or not the operation after step (53) has been performed for all other vehicle types, and then in step (56), it is determined whether all of the above operations have been performed for all vehicle types. Thereafter, in step (57), the vehicle type having the smallest pattern value is determined as the current carry-out pattern.

After the type of the unloading vehicle is determined in this way, the final unloading vehicle is determined from the options of the corresponding type of vehicle and the storage status of the vehicle in each lane. At the time of determining the unloading vehicle, an unloading value is given to each unloadable vehicle based on the same concept as described above, and the vehicle having the minimum unloading value is unloaded. This unloading value is 7 shown below.
It is obtained by adding two values. I) Difference from the carry-out pattern 9999 x (1 + pattern value) However, it is set to 0 when the vehicle type is the same as the carry-out pattern.

B) Difference from ideal C) Difference from minimum interval (when option is available) However, if it is negative, it is set to 0 (OA = 2) d) Difference from the maximum interval (when there is no option) However, if it is negative, it is set to 0 (OA = 2) e) Enrollment value (maximum storage number-enrollment number) x OB (OB = 0.1) f) Import order (import order-unload order) x OC (OC = 0.5) G) Lane fixed similarity value The difference from the carry-out pattern in (a) is that an extremely large value is given to a vehicle different from the carry-out pattern determined by the above-described method, and carry-out is prohibited. Also, the difference from (b) with the ideal is the same idea as in the case of the pattern value described above. In this case, since the option is not always added to the corresponding vehicle, an item for determining the presence or absence of the option is added. (C) and (d) also
It is the same idea as the above pattern value, but if there is an option because there is an option,
The difference from the minimum interval in (c) is added to the output value, and if there is no option, the difference from the maximum interval in (d) is added to the output value. Note that the difference from the maximum interval in this case indicates the degree to which the remaining interval of the vehicle without the option reaches the maximum interval of the option when the number of remaining vehicles is unloaded. The enrollment value of (e) indicates how many vehicles are stored in the lane in which the corresponding vehicle is currently stored, and the vehicle is preferentially carried out from the lane with a large number of stored vehicles. It is to make. The loading order shown in (f) indicates the storage time of the vehicle in the lane, and the vehicle is transported preferentially from the storage time longer. The lane fixed similarity value in (g) compares the fixed lane value given when the vehicle is carried into the lane with the code of the corresponding vehicle, and preferentially carries out the vehicle having a different code. It is to be.

Then, the carry-out value for each vehicle is calculated using the seven calculation formulas shown in (a) to (g) above, and the vehicle having the smallest carry-out value is stored using the carry-out traverser (18) in the storage (13). Out of the predetermined lane and put it into the assembly line (14).

The calculation order when calculating the carry-out value from the calculation formulas shown in the above (a) to (g) is as shown in the flowchart in FIG. That is, first, in step (60), the enrollment value of the lane in which the vehicle is stored and the loading order are added,
This value is first set as a carry-out value. Next, in step (62), it is determined whether or not the corresponding vehicle matches the unloading pattern. If not, the unloading value is set to an extremely large value in step (63). If so, the process proceeds to step (64), where the code of the corresponding vehicle is compared with the lane fixed value. Next, in step (65), the presence or absence of the same code is determined. ), The output value is divided by a predetermined number as the output value = output value−weight × OD (OD = 0.1), and if there is the same sign, the process proceeds to step (6).
Go to 7). The operations from step (60) to step (66) are mainly for obtaining the carry-out value for the lane in which the vehicle is stored, and are described below from step (67) to step (74). Is to determine the carry-out value of the vehicle itself. That is, in step (74), a difference from the ideal value, a difference from the minimum interval, or a difference from the maximum interval of the vehicle is added to the unloading value obtained up to step (66) to obtain a final unloading value. However, when performing the above calculation, it is already determined in step (67) whether or not there is an option for the vehicle. If there is no option, after the difference from the maximum interval is obtained in steps (68) to (70), the difference between the ideal and the maximum interval is added in step (74). , Is added to the carry-out value obtained up to step (66), and that value is used as the carry-out value. If there is an option, go to step (7
After the difference from the minimum interval is obtained by 1) to (73), the value obtained by adding the difference from the ideal to the difference from the ideal in step (74) is calculated by step (66). And the value is used as the export value. When the unloading value is obtained in this way, it is next determined in step (75) whether or not the calculation after step (67) has been performed for all the options of the vehicle, and the calculation for all the options has been performed. Is completed, this value is used as the final export value. The reason why the above determination is made in step (75) is to make calculations for all options from A to J.

As described above, the present invention determines the export vehicle by performing the calculation of the export pattern and the calculation of the export value,
At this time, the unloading traverser (18) of the present invention
Since the evacuation spacer (19) for evacuation of only the platform is provided, vehicles that can be carried out from the storage (13) include not only vehicles located in the first row of each lane but also vehicles located in the second row. It is possible to carry it out, and if there is a vehicle in the evacuation space (19), it is also possible to carry out the vehicle. Therefore, when determining the actual unloading vehicle, the above calculation is
It proceeds in the order shown in the flowchart of FIG. First, in step (80), the carry-out pattern is calculated by the method described above. Next, in step (81), it is determined whether or not there is an evacuation vehicle in the evacuation space (19). If there is an evacuation vehicle, in step (82)
Perform NG determination. As shown in the flowchart of FIG. 11, this NG determination determines whether the vehicle for which the NG determination is performed is of the same type as the unloading pattern and whether the minimum interval of the option when the vehicle is unloaded can be complied with. Is performed and OK is made only when both are satisfied, and NG when not satisfied.
If OK, the process proceeds to step (83), the evacuation vehicle is unloaded, and the current unloading operation ends. If the determination result in step (81) or step (82) is NO, the process proceeds to step (84), and the carry-out value of each vehicle located in the first row of each lane of the storage (13) is described above. It is calculated sequentially by the method. Next, at step (85), the above values are rearranged in the minimum order, and then at step (86), an NG determination is made from the vehicle having the minimum value. Then, in step (87), the NG judgment
It is determined whether or not it is OK. If it is OK, step (8)
Move to 8) and unload the OK vehicle. If the answer is NG, it is determined in step (89) whether or not the determination has been made for all lanes. If the answer is NO, the process returns to step (86) to repeat the above operation. In the case of YES, that is, in the case where the pre-calculated compliance interval cannot be maintained even if any vehicle in the first row of each lane is carried out, the process proceeds to step (90), and it is determined again whether there is an evacuation vehicle. . If there is an evacuation vehicle, the flow goes to step (91) to calculate the carry-out value of the evacuation vehicle. Then, in step (92), this value is set to the minimum value of the vehicles in the first row of each lane. If the evacuation vehicle discharge value ≦ the minimum value of the first column, the process proceeds to step (93), where the evacuation vehicle is discharged, and the evacuation vehicle discharge value> the minimum value of the first column. If so, the process proceeds to step (94), and the vehicle in the first lane with the smallest lane is unloaded. If there is no evacuation vehicle in step (90), the process proceeds to step (95), and the carry-out value of each vehicle located in the second column of each lane is sequentially calculated. Next, the process proceeds to step (96), where the carry-out values calculated in step (95) are rearranged in the minimum order, and then, in step (97), NG determination is performed from the minimum value. Then, in step (98), it is determined whether or not the NG determination is OK. If it is OK, in step (99), it is determined whether or not it is possible to carry out by PI (PI = 6) times,
If unloading is possible, go to step (100) and OK in the second row
Remove the vehicle that has become. Steps (98) and (9)
If it is determined to be NO in 9), the process proceeds to step (101), and it is determined whether or not the determination has been made for all the lanes. If it is NO, the process returns to step (97) to repeat the above operation. or,
If YES, that is, if the pre-calculated compliance interval cannot be maintained even if any of the vehicles in the second row of each lane is carried out, the process proceeds to step (102) and the vehicle located in the first row of each lane The vehicle with the minimum unloading value is unloaded from the inside.

In the present invention, the first row and the second row of each lane are
The optimal vehicle is taken out of the vehicles located in the row.

〔The invention's effect〕

As described above, the present invention determines the type of vehicle corresponding to each lane according to the production ratio at the time of loading the vehicle into the storage, and also includes the types of vehicles that can be unloaded when the vehicle is unloaded. Therefore, the priorities of the unloading vehicles are determined again according to the production ratio at that time, and the data obtained from hundreds of vehicles flowing through the painting line are used to determine the production ratio. That is, the present invention performs a first transfer order rearrangement when a vehicle is carried into the storage, and performs a second transfer order rearrangement when the vehicle is carried out of the storage,
Furthermore, since the data of the production ratio used in the above-described two reassemblies is obtained from several hundred vehicles, the types of vehicles that can be rearranged by this method are the number of storage lanes + several tens of types. It is possible to cope with various kinds of vehicle rearrangement. Further, according to the present invention, since the evacuation space is provided in the unloading traverser, when the unloading priority of the vehicle is determined, the priority is determined from the vehicles located in the first and second columns of each lane of the storage. can do. For this reason, the selection range when selecting the vehicles to be carried out from the storage can be made very wide, and it is possible to cope with more types of vehicle rearrangement.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the overall configuration of the present invention, FIG. 2 is an explanatory diagram showing an example of vehicle data obtained from a painting line, and FIG. 3 is an explanatory diagram showing an example of a vehicle storage state in each lane of storage. FIG. 4, FIG. 4 is an explanatory diagram showing the calculation contents at the time of calculating the lane fixed similarity value, FIG. 5 is an explanatory diagram showing the calculation contents at the last vehicle similarity value calculation, FIG. 6 is a flowchart showing the loading logic, 7 is a graph showing an example of the unloading state of the vehicle, FIG. 8 is a flowchart showing a method of calculating the pattern value, FIG. 9 is a flowchart showing a method of calculating the unloading value, FIG. FIG. 11 is a flowchart showing a method of NG determination, and FIG. 12 is a schematic diagram showing an example of storage. (10) ... painting line, (13) ... storage, (14) ... assembly line, (17) ... loading traverser, (18) ... unloading traverser, (19) ... evacuation space.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-265252 (JP, A) JP-A-61-207277 (JP, A) JP-A-61-160369 (JP, A) JP-A Sho 52- 129157 (JP, A) JP-A-62-175273 (JP, A) JP-A-62-15067 (JP, A) JP-A-62-161618 (JP, A) JP-A-62-240216 (JP, A) Japanese Utility Model Showa 57-37915 (JP, U) Japanese Utility Model Showa 57-174426 (JP, U)

Claims (1)

(57) [Claims] 1. A plurality of rows of storage for temporarily storing a work are provided between a first line and a second line, and a work conveyed from the first line is stored in a desired storage by a loading traverser. Then, a desired work of the works stored in each storage is unloaded from the storage by the unloading traverser and input to the second line, thereby transferring the work between the first line and the second line. In the rearrangement method for rearranging the order, a retreat space for temporarily storing the work unloaded from the storage into the unloading traverser for unloading the work from the plurality of rows of storages without inputting the work to the second line. When a work is loaded into the storage, the production ratio for each type of work is calculated based on data of hundreds of works currently flowing on the first line. In accordance with the production ratio, the type of storage to be used is determined for each type, the incoming work is loaded into the storage corresponding to the type, and when the work is unloaded from the storage, the work currently flows on the first line. Based on the production ratio for each type of work obtained from the data of hundreds of works, the work that is most suitable for leveling the work of the second line is selected from the work that can be carried out at the storage and the evacuation space. The unloading priority is determined, and the work located in the first row or the evacuation space of the corresponding storage is unloaded by the unloading traverser and put into the second line according to the priority, and the work located outside the first row is moved. The work on the line is characterized in that the work in front of the work is retracted to the evacuation space, the work is carried out, and the work is put into the second line. Transport order recombinant method.