JPS61207277A - Carrying order changing method of work on line - Google Patents

Abstract

PURPOSE:To change the carrying order of work well while to carry the work reliably in order by determining the order for taking out respective work while considering the storages of first and second line words then storing respective work into the storage. CONSTITUTION:Five rows of line-type storages 14-1-14-5 are arranged between the printing line 10 and the assembling line 12. A vehicle 16 from the painting line 10 is temporarily stored in said storage where the carrying order is changed then feed sequentially toward the assembling line 12. In other word, the order for taking-out is provided for respective vehicle 16 on the painting line 10 in the first process. The order for taking-out is determined while considering the number of storages 14. In second process, the vehicle 16 is stored sequentially and selectively in the most suitable storage 14 on the basis of said determined order. Then the vehicle 16 is sequentially fed toward the assembling line 12 in accordance to the determined order.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a method for rearranging the transport order of workpieces on a line, and particularly to an improved method for effectively rearranging workpieces in an optimal order.

[Yonetachi and Nii ■The YJ manufacturing process for i1 cars at IJ- often involves manufacturing multiple types of vehicles on the same line in each process, and with the diversification of consumer tastes in recent years, The number of types of vehicles manufactured on production lines is also increasing.

By the way, vehicle manufacturing in a factory often consists of multiple VJ construction lines, such as a painting line and an assembly line, and it is important to improve the overall work efficiency by properly managing the production progress of the equipment and work on each of these lines. In order to achieve this, it is necessary to rearrange the conveyance order of vehicles each time to obtain the optimal combination for each line.

In particular, on the vehicle assembly line, it is necessary to send vehicles with high assembly difficulty and vehicles with low assembly difficulty at an appropriate frequency, and if there is a specification vehicle to which specific parts are assembled, the specification vehicle It is necessary to send both cars and cars with other specifications to the line at an appropriate frequency.

This is because on a car body assembly line, cars with a high level of assembly difficulty take longer to assemble than cars with a lower level of assembly difficulty. Therefore, if vehicles with a high level of assembly level are continuously sent to the assembly line, this assembly line becomes saturated. This is because, in the worst case, the entire line may stop.

In addition, if vehicles that require specific parts to be colored are continuously supplied onto an assembly line, there will be frequent shortages of parts on the assembly line, which will reduce work efficiency. be.

For this reason, as shown in Figure 9, between the vehicle assembly line and the unloading line located upstream thereof, for example, some of the vehicles coming from the painting line are stored in groups, and the order in which the vehicles are transported is stored. Multiple storages are provided to adjust.

Vehicles are stored in these storages by a storage worker who identifies the type of vehicle being transported on the painting line and operates a storage number button arranged on a storage operation panel.

As a result, vehicles transported from the painting line are sequentially stored in each storage that corresponds one-to-one with the type of vehicle.

Further, the vehicles stored in each storage are loaded into the assembly line by the loading operator operating the storage number buttons arranged on the loading operation board, as shown in FIG. As a result, the desired type of vehicle is loaded onto the assembly line from the storage designated by the storage number button.

[Problems to be Solved by the Invention] Conventionally, the vehicles stored in the ball storage are placed on the assembly line using a sequence table in which the storage numbers of the vehicles being put in are written periodically. The vehicle input order in this sequence table satisfies various input constraint conditions (for example, prohibition of consecutive input of vehicles with the same specifications) set in response to requests from the assembly site, and the vehicle input ratio is determined according to the production plan. It is created to match the production ratio of each specification vehicle within a specified fixed period.

However, such a sequence table is artificially created in advance by a person in charge taking into consideration the vehicle input constraints and the production ratio within a predetermined period of the production plan, and therefore, due to the circumstances of the assembly line, for example, When some of the constraint conditions are changed, there is a drawback that it is difficult to quickly respond to this change and set a new vehicle introduction order.

Furthermore, when the number of vehicles stored in a particular storage temporarily increases or decreases, it is preferable to temporarily increase or decrease the frequency of inputting vehicles from that storage. However, with the conventional vehicle introduction method that is uniform according to the ordering table, it is difficult to set an appropriate purchasing frequency according to the number of vehicles stored in the storage, and in the worst case, the number of vehicles stored in the storage is A problem arises in that the storage becomes full and no new vehicles can be stored in it, or conversely, the number of vehicles stored in the storage becomes zero.

Furthermore, with the diversification of today's vehicle specifications, it is desired to further classify vehicles supplied from a painting line according to their types, and to rearrange the order in which they are transported.

However, in the conventional method, as shown in Fig. 9, vehicles were accommodated in a one-to-one correspondence between the vehicle type and the storage. (Usually 4 to 8 bottles) took 11 doses, and improvement was desired.

For this reason, as shown in Fig. 11(a), before the vehicles are stored in the storage, in other words, the order in which the vehicles are taken out from the storage to the assembly line is determined in advance for the vehicles being transported on the painting line. A method has been considered in which vehicles are sequentially stored in the storage according to the retrieval order determined in this manner.

However, in most of these methods, the order of take-out is determined in order from 1 to n without considering the number of storage units, and the vehicles stored in the storage are assembled according to this order of take-out. There has been a problem in that there are cases where it is not possible to send the product to the line.

That is, for example, if there are only 5 storages, the removal order for vehicles being transported on the painting line is 6.5.4. . . . 1, there was a problem that the vehicle could not be sent out according to the determined order of take-out from the storage, as shown in FIG. 11(b).

This is because, in order to send vehicles from the storage to the assembly line in accordance with a predetermined take-out order, a vehicle with a higher rank must not exist in front of a vehicle with a lower rank in any storage.

However, as shown in FIG. 11(a), when the vehicle retrieval order is determined, the retrieval order is 6°5.4.3.
Since each vehicle in rank 2 is stored in all five storages, no matter which storage the vehicle in rank 1 is stored in, there will be a vehicle in front of it with a higher rank (slower rank). As a result, vehicles cannot be sent out from storage to the assembly line in the correct order.

In this way, conventionally considered ranking methods
It is not always possible to guarantee that vehicles can be sent from storage to assembly lines according to the predetermined emission order, and effective countermeasures have been desired.

Purpose of utilization The present invention was made in view of such conventional problems, and its purpose is to increase the number of storages from the first line to the second line without being limited to the number of storage lines used. It is an object of the present invention to provide a method for rearranging the transport order of works on a line, which can rearrange the order of transported works to obtain an optimal combination.

[Means for Solving the 1m Problem] FIG. 1 shows a flowchart illustrating the method of the present invention.

The method according to the present invention provides a plurality of storages for temporarily storing workpieces between a first line and a second line.

Then, in the first step, a work group corresponding to the number of storages is selected from the reference first work for the work to be transported on the first line, and from among these, the work with the highest temporary priority is placed in the first work group. Take out order. And then,
A number of work groups corresponding to the number of storages obtained by excluding the ranked work from the reference first work are repeatedly selected, and from among these, a work with a high provisional priority is sequentially determined as the next priority.

By doing this, the take-out order for each workpiece transported on the first line is 1.2.3.・
...will be decided in sequence.

Furthermore, the workpieces transported on the first line are stored in the storage in the second step.

This second process detects the take-out order of the last workpiece stored in each storage, and replaces each workpiece conveyed on the first line with a work earlier than the take-out order of the workpiece. is sequentially selected and input to the storage that is stored at the end.

The works stored in the storage in this manner are sequentially sent out from the storage toward the second line according to a predetermined take-out order.

As described above, according to the present invention, it is possible to favorably rearrange the order in which workpieces are conveyed from the first line to the second line. The order of taking out each workpiece is determined by taking into account the number of storages provided in between and storing it in the storage, so each workpiece stored in the storage is always sent to the second line according to the determined order of taking out. Exit 1 becomes possible.

[Example 1 Next, preferred embodiments of the present invention will be described based on the drawings.

FIG. 2 shows an apparatus for rearranging the transport order of vehicles using the method according to the present invention. -1.14-2°...14-5 are arranged 6 in parallel. Then, the vehicle 16 transported from the painting line is stored in this storage 14,
Here, the transport order is rearranged and the parts are sequentially sent out to the assembly line.

In the method of the present invention, first, in the first step, each vehicle conveyed on the painting line 10 is given a pick-up order, and in the second step, each vehicle that has been ranked in this way is Vehicles 16 are sequentially and selectively stored in the most suitable storage 14.

The vehicles stored in the threadtone 14 in this manner are sequentially sent out to the assembly line 12 according to the order of take-out determined in the first step.

In this way, the vehicles transported on the painting line 10 can be sequentially sent out within the storage 14 to the recombination assembly lines.

A characteristic feature of the present invention is that in the first step, the retrieval order of each vehicle is determined in consideration of the number of storages 14, and the vehicle is placed in the optimal storage 14 based on the retrieval order set in this way. The goal is to store it selectively.

By doing so, the vehicles stored in the storage 14 can be sequentially supplied to the assembly line 12 according to the determined take-out order, and the transport order of the vehicles 16 can be rearranged in a good manner.

The transport order rearranging method according to the present invention will be described below, including a first step of assigning a take-out order to the vehicles being transported on the painting line 10, a second step of storing the vehicles with the determined take-out order in storage, and The vehicle loading process of loading the vehicles stored in the storage into the assembly line 12 will be explained in detail in the order of the steps.

First Step FIG. 3 shows a preferred embodiment of the first step according to the present invention. The order in which the vehicles 16 are taken out is sequentially determined as follows.

First, when the vehicle 16 is being conveyed on the painting line 10 as shown in FIG.
A number of first workpieces corresponding to the number of storages are selected from 00, and a workpiece having a higher board priority is determined as the first workpiece group from among them.

In the embodiment, the number of storages is five, so the first work group is F and B.

D, D, and E, and from among these, a vehicle with a higher board position, for example, B, is determined. Here, the board part priority order can be set appropriately according to various conditions, and when determining the board part priority order of a work other than a vehicle, an appropriate evaluation function and m It can be determined under constraint conditions.

Once the first vehicle B has been determined in this manner, a vehicle corresponding to the second vehicle priority is determined.

When determining the second take-out order, a second work aT corresponding to the number of storages is selected from the reference leading vehicle 100 excluding works that have already been ranked. Then, from among this second work group, the vehicle with the highest plate part priority is determined as the second take-out order.

In the embodiment, since the vehicle that has already been ranked is B, the second work group is F, D, and D.

If the vehicles E and A are selected and the vehicle with the highest board priority is, for example, A, then A is determined as the second extraction order.

Thereafter, similar operations are repeated to sequentially determine the order of extraction for each workpiece.

As described above, according to the present invention, when determining the order of taking out each work, a number of vehicles corresponding to the number of storages are always selected from the reference leading vehicle 100 as a work group,
In order to sequentially determine the workpieces with higher plate parts priority from among these, the retrieval order (k+1
) The number of vehicles above is always less than the number of storages 14.

Therefore, in the second step described later, each storage 1
Each vehicle 16 can be stored in the storage 14 so that there is no vehicle in front of it that is slower in taking out the vehicle. This ensures that the mediums can be sent from the storage 14 to the assembly line 12 in accordance with the order of removal determined in the first culm, as will be described later.

Here, when the work to which such a take-out order is given is a vehicle as in this embodiment, the workpiece is conveyed on the painting line 10 when setting the plate part priority order for reasons described later. It is necessary to predetermine the population of vehicles 14.

Therefore, in the embodiment, when assigning a take-out order to such a vehicle 16, first the reference leading vehicle 100 is determined.
n vehicles are set as one group, and the extraction order for each vehicle is sequentially determined using the target tracking method described below (.

First, the details of the target tracking method used in this embodiment will be explained in detail.

This target tracking method is a method of determining the order of retrieval for each target vehicle so that each vehicle type can be retrieved from storage according to its proportion to all vehicles.

That is, suppose there are m types of target vehicles being transported on the painting line 10, and the ratio of each vehicle to the total number n of vehicles included in the ranking group is R+, R2, etc.
Rm (%).

Under this condition, if you want to determine the take-out order equally from 1 to n according to the ratio for any car type, the number of cars from rank 1 to rank k (1≦to≦n) Among the vehicles, each type of vehicle has a rating of kR+/100. kR2/
100. ..., kRa/100 units (these multi-values are not necessarily integers) is ideal.

Therefore, the ideal existence ratio of each vehicle type given in this manner is defined as the target number of vehicles of each vehicle type in rank k.

In addition, the number of each car type that actually exists among the (k-1)th vehicles from rank 1 to rank (k-1), that is, the number of each car type that has already been ordered, is xl e x2
, .

The difference between the target number of vehicles and the actual number of vehicles is ((kr+/100)-X+).

((kr2/100)-X2).

((krm/100)-Xi) is defined as the number of late vehicles of each vehicle type in rank k.

In the present embodiment, this number of delayed vehicles is set as the board's priority in rank k, and the vehicle type with the largest value is selected as the vehicle type with the highest priority and given the extraction order of k.

By doing so, it becomes possible to rank each vehicle so that the actual number of vehicles of each vehicle type approaches the target number.

FIG. 4 shows a preferred embodiment of a method for assigning pick-up orders to vehicles conveyed on the painting line 10 using such a target tracking method, and FIG. The target number of vehicles, actual number of vehicles, number of late vehicles, and take-out order of each vehicle determined by the method described above are shown.

Prior to ranking according to the method of this embodiment, first, as shown in FIG. The vehicles existing between the cameras 18 and 20 are set as one ranking determination group.

Further, in this embodiment, it is assumed that the number of storages 14 to be used is 5, the maximum capacity of each storage 14 is 4, and the number of vehicles in the ranking group existing between the two cameras 18.20 is 20. However, the vehicle types that are subject to further ranking are A, B, C, and D.

There are six types of cars, E and F, and the number of cars in each ranking group is 6.4.2.4.2.

Therefore, the ratios of these vehicle types are 0.3 and 0.0, respectively.
2, 0.1, 0.2, 0.1.

Note that the number of each of these vehicle types is detected by identifying the vehicles with the camera 20 as they are transported on the painting line 10. Furthermore, in the embodiment, "prohibition of continuous input to vehicle types" is set as the input constraint condition.

First, the operation for determining the retrieval order according to the method of this embodiment is as follows.
The process starts when a vehicle is transported onto the painting line 10. At this time, the total number of vehicles included in the ranking determination group and the number of vehicles of each type are each 100 standard leading vehicles.
passes through the camera 20 and is detected by the camera 20 until it reaches 1' in front of the camera 18.

Then, based on the total number n of vehicles in the ranking determination group read in this manner and the number of vehicles of each vehicle type, the ratio R1 of each vehicle type included in the group is determined.

R2, . . . R1 are calculated, and then the retrieval order k is set to -1, and the order determining operation described below is started.

First, the determination of the vehicles with = 1 in the extraction order is the fifth vehicle from the reference leading vehicle 100, that is, F, B, D, D.
, E are selected as the first work group, and the target number, actual number, and number of delayed vehicles of each vehicle type are calculated using the target tracking method, and the vehicle with the highest number of delayed vehicles is selected as the vehicle with the highest priority in the board section. select. At this time, vehicle types A and B both show a maximum value of 0.2 in the number of delayed vehicles, and in such a case, the vehicle with the earliest arrival order to the storage 14 is selected as the vehicle with the highest board ranking. Select as. Therefore, the second vehicle type B from the reference leading vehicle is determined as the vehicle with the first pick-up order.

After determining the vehicle ranking position in this way, next k
is incremented, and the determination operation for k=2 vehicles is performed.

When such an operation is started, the second work group of vehicles from the reference leading vehicle 100 to the 6th vehicle excluding the vehicles already ranked, that is, F, B, D, E, △ A work group is selected.

Then, according to the target tracking method, the number of delayed vehicles included in this second work group is calculated, and the vehicle with the largest value is determined as the vehicle corresponding to the second extraction order.

At this time, since the number of delayed vehicles of vehicle type A is 0.6, which is the largest, this vehicle A is determined as the second take-out order, and a rank determination operation of =3 is started to increment k.

In the extraction order determination operation for k=3, the reference first 1
The 100th to 7th vehicles (71 vehicles) are selected as the third work group. At this time, since the input order of each vehicle B and A has already been set, they will be selected from the third work group. As a result, the work group of M3 is F, D, B, E.
, A will consist of five vehicles.
- In addition, in the previous ranking determination operation, A was determined as the vehicle that corresponds to the second extraction ranking, so the third A cannot be selected as a heavy vehicle corresponding to the extraction order.

Therefore, in this case, F included in the group in the third work
, D, B, and H, and when calculating the number of delayed vehicles for each of these vehicle types, the number of delayed vehicles for vehicle type B is the largest at 0.6, so The vehicle type is determined as a vehicle that corresponds to the third extraction order.

Here, Type 11B is the third and fourth vehicle from the standard leading vehicle.
However, if there are a plurality of vehicle types selected in this way, vehicle B having the earliest arrival order to the storage 14 is determined as the vehicle corresponding to the third take-out order.

In this embodiment, such an operation is repeated to sequentially determine the vehicles whose extraction rankings are from 4th to 20th.

Second Step Next, the second step of storing the vehicles whose removal order has been determined in this manner in the optimal storage 14 will be explained.

In this second process, when the vehicles that have been transported to the vicinity of the exit of the painting line 10 are stored in the storage 14, first, a vehicle that is earlier in the order of taking out the vehicle is stored in the storage 14 that is stored at the end. The basic principle is to select and store the vehicle in the storage.

By doing this, each storage 14-1.1
4-2. ...In 14-5, vehicles that are earlier in the removal order are always stored in front of vehicles that are later in the removal order, and it is possible to sequentially send out the vehicles 16 from the storage 14 to the assembly line 12 according to the order of removal. Become.

In this example, in addition to these basic agents, the following two are used to uniquely set the vehicle storage.
The same rules are used.

This first rule instructs that when there are multiple storages that can store vehicles, to prevent the storage 14 from becoming full, the vehicle should be stored in the storage that has the least number of storage spaces. do.

In addition, the second rule specifies that when the storage storage of a vehicle is not uniquely set by the first rule, the vehicle with the closest rank to the vehicle to be stored is stored. Instructs to store the vehicle in storage.

Next, the specific operation of this second step will be explained.

FIG. 6 shows the operation of actually storing the 20 vehicles ranked in the first step shown in FIGS. 4 and 5 into the storage 14. The vehicle shown represents the vehicle in the previous ranking determination group.

Further, the number written inside each circle represents the take-out order of the vehicle represented by that circle.

First, in the state shown in FIG. 6(a), there is a vehicle in the fourth input order at the exit of the painting line 10. At this time, each vehicle that has already been stored in the storage 14 is set to be sent to the assembly line 12 before any vehicle that will be stored thereafter, and in this case, which storage 14- 1.14-2. ...A new vehicle can also be stored for 14-5.

Therefore, in this case, the vehicle is stored in the storage 14-4 with the least number of vehicles to which the first same rule is applied,
The state shown in FIG. 6(b) is reached.

In the state shown in FIG. 6(b), there is a vehicle in the first pick-up order at the exit of the painting line 10, and in this case, if the basic principle is applied, the fourth storage 14
Vehicles can be stored in storages 14-1, 14-2, 14-3 and 14-5 other than -4.

Therefore, in this case, apply the first 61 rules and
The vehicle is stored in the storage 14-1 of FIG. 6(c).
The state will be as follows.

In the state shown in FIG. 6(C), the third loading order heavy vehicle exists at the exit of the painting line 10, and if the above basic principle is applied, any storage other than the fourth storage 14-4 can be used. It can also be stored in the first
Even if the same rules are applied, it is also possible to store in multiple storages.

Therefore, in this case, the second 41 rule is applied and the vehicle is stored in the first storage 14-1, as shown in FIG. 6(d).
The state will be as follows.

This vehicle accommodation operation can be carried out in the same manner as shown in FIG. 6 (
d) to (1) may be repeated in sequence.

In addition, from Figure 6 (F), the vehicles ranked this time have begun to be sent to the assembly line 12, and Figure 6 (1) shows all 20 vehicles ranked this time. This shows the state in which the storage has been completed.

From this point on, new ':;!' rankings are made in the same way within the next ranking group. 1i cars are sequentially stored in the storage 14.

As explained above, it is understood that in the present invention, the vehicles ranked in the first step can be well accommodated in each storage 14 so that there is no vehicle in front that has a slower retrieval order than the vehicle. .

Sending out the vehicle to the assembly line Next, the operation of sending out the vehicle stored in the storage 14 in the second step toward the assembly line 12 will be explained.

Vehicles are sent out from the storage 14 to the assembly line 12 by sequentially selecting the vehicles stored in the storage 14 that are earlier in the removal order.

Such a sending operation may be performed automatically by storing the order of taking out each vehicle stored in the storage 14 in the memory in advance and according to this data. It is also possible to perform the cutting operation manually.

FIG. 6 shows the case where the above operation is performed manually. FIG. 7(a) shows the state inside the storage in FIG. 6(0), and FIG. 7(b) shows the state at this time. The data shown on the display device is displayed.

That is, in the state shown in FIG. 7(a), it is already known in which strain the vehicles in the fourth to fourteenth take-out orders are accommodated, so the display device does not display the 7th take-out order. As shown in Figure (b), the storages in which the vehicles to be sent out next to the assembly line are stored are displayed in order.

Therefore, the operator can select the strain 14 by simply operating the storage selection button instructed by this display device.
Vehicles can be accurately sent out from the vehicle to the assembly line 12 in accordance with the order of take-out.

Note that the display content of this display device is updated with new content each time the operation of sending the vehicle toward the assembly line 12 is completed.

In this way, it is understood that according to the transport order rearranging method of the present invention, more vehicle types than the number of storage units to be used can be rearranged into an appropriate transport order on the line.

Although this embodiment has been described using a vehicle as the workpiece whose conveyance order is to be rearranged, the present invention is not limited to this, and the conveyance order of other workpieces can be changed in the same way. It is possible to rearrange the

In this case, it is necessary to appropriately set the evaluation function formula representing the board part priority order and other conditions for the target work.

Further, in this embodiment, the first line is a painting line, and the second line is an assembly line. However, the present invention is not limited to this, and other lines can also be line and a second line.

Recombining Apparatus FIG. 8 shows a transport order recombining apparatus formed using the method of the present invention.

The device of the embodiment reads the vehicle number assembled on a vehicle using a reading camera 18, 20 installed on the painting line 10 and a reading camera 22 installed at the entrance of the assembly line 12. Read data to calculation device 2
Enter for 4.

The arithmetic unit 24 collates such an input signal with the data representing the relationship between the vehicle number and the vehicle type stored in the first storage device 26, and calculates the vehicle detected by each camera 18, 20 and 22. judge the type of

Then, all the vehicles existing between the cameras 18 and 20 are defined as one ranking determination group, and the order in which all the vehicles belonging to this group are taken out to the assembly line is determined according to the first step □ described above, The data is written and stored in the second storage device 28.

Note that various ranking determining conditions in the first step are set by the row number setting device 30 and written and stored in the third storage device 32.

In addition, the performance device 24 detects the vehicle that has passed through the camera 18.
It is determined in accordance with the second step which storage location to enter, and a control signal is output to the line conveyor 29 to accommodate each vehicle in the determined storage location. At this time, the storage in which each vehicle is stored is stored in the second storage device 28.

Furthermore, the camera 22 inputs the vehicle number input from the storage 14 to the assembly line 12 to the arithmetic unit 24, and the arithmetic unit 24 uses this input data to determine from which storage the next vehicle is input to the assembly line. 7 (b) on the display device 34.
).

By operating the corresponding storage button while viewing this display, the operator can sequentially send out the vehicles stored in the storage toward the assembly line in accordance with the set take-out order.

[Effect of the Invention 1] As explained above, according to the present invention, the transport order of the workpieces transported from the first line to the second line [
It becomes possible to perform one change effectively even for various types of work that exceed the number of storages to be used.

[Brief explanation of the drawing]

FIG. 1 shows the flow order recombination method according to the present invention.
-1/- Fig. 2 is an explanatory diagram of a line to which the method of the present invention is applied; Fig. 3 is an explanatory diagram showing a preferred embodiment of the first step according to the present invention; Flowcharts 1 to 1 of the first step shown in FIG. 3, FIG. 5 is an explanatory diagram showing the calculation contents not shown in FIG. 4 but performed according to the flowchart, and FIG. FIG. 7 is an explanatory diagram showing the relationship between the state of workpiece storage in the storage and the order of input to the assembly line. FIG. 8 is an explanatory diagram showing the order of transport to which the method of the present invention is applied. A block diagram showing a preferred embodiment of the rearranging device, and FIGS. 9 to 11 are explanatory diagrams showing a conventional transport order rearranging method. 10... mW line 12 as the first line
... Assembly line 14 as the second line ...
Storage 16 ... Vehicle as a Work Applicant Toyota Motor Corporation Agent Patent Attorney Furu 1) Kenji (1 other person) 7-39 Figure 1 Figure 2 Figure 7 (C1) (b)

Claims (1)

[Claims] (1) Provide multiple rows of storage for storing workpieces between the first line and the second line, and set the takeout order for the workpieces transported on the first line by the process shown in the following (a). The workpieces are sequentially stored in the storage by the step shown in the next step (b), and the thus stored workpieces are transferred from the storage to the second storage according to the order of retrieval.
A method for rearranging the transport order of workpieces on a line, the method comprising: sequentially feeding the workpieces toward the line, and rearranging the transport order of the workpieces. (a) For the works transported on the first line, select a work group of the number corresponding to the number of storages from the reference first work, and decide the work with the highest temporary priority from this width as the first take-out order. Next, select a group of works corresponding to the number of storages by excluding the ranked works from the reference leading vehicle,
The first step is to repeatedly determine a workpiece with a higher provisional priority as the next priority among these works, and to assign a retrieval order to each workpiece. (b) A second line that sequentially selectively stores each workpiece conveyed on the first line toward the storage where the workpieces with a higher order than the takeout order of the first line are stored at the end.
process.