JP2894116B2 - Permutation correction system for painted body storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a painted body storage (PBS) which is disposed after a painting process in a vehicle production process and stores a large number of painted vehicle bodies, and is used for a vehicle to be flown to a subsequent vehicle assembly process. It relates to a system for correcting permutations.

[0002]

2. Description of the Related Art Various specifications such as a four-wheel drive (4WD), a sunroof, an air conditioner (air conditioner), and an airbag are set in a vehicle such as an automobile in accordance with a request of a purchaser. Since the work load for assembling those specifications in the vehicle assembly process differs depending on the specifications, when a vehicle with these various specifications is passed to the vehicle assembly process, the permutation considering the work load leveling must be taken. It is desirable to shed. Therefore, the production plan is also originally made in consideration of the delivery date and the leveling of the work load in the vehicle assembly process. In the first body assembly process in the vehicle production process, the vehicles are ordered in the production order based on the production plan. Swept away. For details on the production plan, see the Automotive Engineering Complete Book, Vol. 18, "Manufacturing Control of Automobiles" (published by Sankaido Co., Ltd. on December 25, 1980).
Page 139, 4.5.1 (4), “Points for improvement of automobile production lines”.

[0003]

However, in the painting process subsequent to the vehicle body assembly process, it is more convenient to collect a certain number of vehicles set to the same color and collect them, thereby eliminating the need for color change and increasing the production efficiency. However, the order of vehicles coming out of the painting process does not always follow the production plan, and the order of production is often replaced by the original production order based on the production plan. In many cases, the order of the vehicles performed has been changed from the original production order. Therefore, when the vehicle is passed to the vehicle assembly process with the permutation as it is, the work load of workers and equipment varies, and when the load is light, hand waiting state occurs, but when the load is heavy, The problem is that the work cannot be completed, and in severe cases, the line is stopped.

By the way, a PBS is usually provided between the painting process and the vehicle assembling process in order to store the number of painted vehicles enough to absorb the lead time. , A plurality of storage lanes branched from the end of the loading lane, a single unloading lane where the storage lanes join, and a forwarding lane branching from the middle of the unloading lane and joining the loading lane. Some have The present invention relates to the above P
It is an object of the present invention to provide a permutation correction system that advantageously solves the above-described problem in view of the fact that a BS can perform permutation correction of a vehicle.

[0005]

In order to solve the above-mentioned problem, the system of the present invention for correcting the permutation of vehicles flowing to the vehicle assembling process after the carry-out lane in the above-described PBS is shown in FIG. As shown, of the plurality of counters provided for each type of specification to be mounted on the vehicle in the vehicle assembling process, and each of which has an interval number set according to a work load required for mounting of the corresponding specification, A specification interval counting means 1 for incrementing a counter corresponding to a specification not included in the vehicle determined as the vehicle and zeroing the counter corresponding to a specification included in the vehicle determined as the unloading vehicle; Of the vehicles in each front row of the storage lane, a vehicle having a specification corresponding to the counter that has reached the set interval number is set as a determination target, and the vehicle to be determined is A carry-out candidate is selected based on a first priority table determined in the descending order of the workload, and when there is no target to be judged, the value of the counter is read from a vehicle in a front row of each of the plurality of storage lanes. Regardless of the work load, a carry-out candidate is selected based on the first priority table determined in ascending order, and among the carry-out candidate vehicles, the vehicle in the frontmost row, in the case of the same row, in the original production order. Unloading vehicle determining means 2 for determining the vehicle with the earliest order as the unloading vehicle, and when the vehicle determined as the unloading vehicle is in the front row of the storage lane,
Flow the vehicle through the unloading lane to the vehicle assembling process, and if the vehicle determined to be the unloading vehicle is not in the front row of the storage lane, the vehicle in the row before the vehicle is unloaded from the unloading lane. After returning to the forwarding lane, the vehicle transportation control means 3 which flows the vehicle determined as the unloading vehicle to the vehicle assembling process through the unloading lane.
It is characterized by having.

[0006]

In such a system, specification interval counting means 1 is provided for each type of specification to be mounted on a vehicle in a vehicle assembling process, and each of the intervals corresponds to a work load required for mounting the corresponding specification. Among the plurality of counters for which the number is set, the counter corresponding to the specification of the vehicle determined as the unloading vehicle is incremented, and the counter corresponding to the specification of the vehicle determined as the unloading vehicle is set to zero. The unloading vehicle determining means 2 determines, as a determination target, a vehicle having a specification corresponding to the counter that has reached the set interval number among the vehicles in the front row of each of the plurality of storage lanes, and From the first priority table determined in the descending order of the workload, and selects the unloading candidates. If there is no determination target, each of the plurality of storage lanes is selected. From the vehicle in the square column of, regardless of the value of the counter, first defined in ascending order of the workloads 1
Is selected based on the priority order table, and among the vehicles of the export candidates, the vehicle in the frontmost row, and in the case of the same row, the vehicle with the earliest order in the original production order is determined as the export vehicle.

[0007] In this system, when the vehicle determined to be the unloading vehicle is in the front row of the storage lane, the vehicle transport control means 3 causes the vehicle to flow to the vehicle assembling step through the unloading lane. If the vehicle determined to be the unloading vehicle is not in the front row of the storage lane, the vehicle in the row before the vehicle is returned from the unloading lane to the forwarding lane, and then is determined to be the unloading vehicle. The flown vehicle flows through the unloading lane to the vehicle assembly process.

Therefore, according to the system of the present invention, PB
Even if the original production order is replaced in the vehicle assembly process or painting process before S, the specification interval counting means 1 counts each specification in PBS, and after the vehicle having the specification flows to the vehicle assembly process in the vehicle assembly process. Based on the number of vehicles that do not have the specifications, the unloading vehicle determination means 2 uses the specifications with a large work load, a large number of spaces, and a small work load so that the work in the vehicle assembly process is leveled. For vehicles, determine the unloading vehicles so that the number of spaces is small and empty.If there are multiple vehicles with the same specifications, determine the unloading vehicles so as to reduce the number of transported vehicles and also follow the original production order. Since the means 3 allows the vehicle determined as the unloading vehicle to flow to the vehicle assembling process even if it is not in the front row of the storage lane, the PBS can level the work in the vehicle assembling process. And obtained flowed vehicle following the vehicle assembly process permutations that fix to so that the occurrence of hand waiting or line stoppage of the vehicle assembly process can be prevented effectively.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is a block diagram showing a production management system of a painting factory in an automobile production factory, including an embodiment of a PBS permutation correction system according to the present invention.
, A factory host computer (not shown) for determining the production order, controlling the cost of each part, etc., is connected to the overall management computer for performing production management and quality control of the entire automobile production factory. Network (LAN) 12 and Production Information LAN 13
And a file server (F / S) 15 for production control, a F / S 16 for quality control, a painting process in the painting factory, and a painted body
A painting process management computer 17 for managing a storage (PBS) is connected.

The painting process management computer 17 here
Is an online computer 17a that operates normally,
It is configured by connecting in parallel a backup computer 17b that operates when the computer 17a fails, etc.
The process management computer 17 has a quality history storage D / B 21 composed of a hard disk drive via an in-process LAN 20 having a management system LAN 18 and a production instruction system LAN 19.
, An input / output terminal device 22, an ID card data management cell controller 23 and a quality control cell controller 24, each comprising a normal computer, and a data input / output terminal server (T / S). ) 25, a T / S 26 for outputting an instruction of a management system to an operator, and a printer 27 for printing and outputting production management data and quality data.

The process control computer 17 further includes:
Through another in-process LAN 29 having a plurality of nodes 28, each process of undercoating, intermediate coating, and overcoating and the above PBS
Programmable logic controllers (P
LC) 30 is connected to the cell controller 23 via the LAN 31. A plurality of ID controllers 34 for controlling the transfer of information to the ID cards 32 and 33 are connected to the cell controller 23, while the cell controller 24 is connected to the LAN 35. A terminal device 36 for inputting / outputting quality data is connected to the T / S 25, and a terminal device 37 for inputting / outputting general data is connected to the T / S 25, while the T / S 26 is connected to a worker. The work instruction panel 38 for display and the result display panel 39 are connected,
The undercoating, intermediate coating, and PLC30 in each of the overcoating processes include:
A plurality of PLCs 41 for controlling the operation of work equipment such as a painting robot and an electrodeposition coating apparatus are connected via a LAN 40, while a plurality of PLCs 43 are connected via a LAN 42 to the PLC 30 of the PBS.

Incidentally, as shown in FIG. 3, the PBS in this case is connected to one carry-in lane 44 following an undercoat step (not shown) located at the end of the overcoating step (above in the drawing) located at the end of the above-mentioned coating step. , Four storage lanes No. 1 to No. 4 branched from the end of the loading lane 44
45, a single export lane 46 where the storage lanes 45 join, and a forwarding lane 47 which branches off from the middle of the export lane 46 and joins the import lane 44, and is connected to the PLC 30. The plurality of PLCs 43 control the operation of an overhead conveyor that transports painted vehicles in the lanes 44 to 47 for each lane. A vehicle assembling process (not shown) is continued beyond the carry-in lane 44.

The ID controller 34 here is
It comprises a wireless transmission / reception circuit, various memories, and a control computer, and is provided at the entrance of the PBS in addition to each step of undercoating, intermediate coating, overcoating, etc. in the coating process, and is provided with a predetermined data reception start signal. Selective transmission with a data transmission start signal, subsequent transmission of data, and reception of signals from the ID cards 32 and 33 are performed.

On the other hand, the ID card 32 here comprises a wireless transmission / reception circuit, a read-only memory (ROM), a readable / writable memory (RAM), and a control computer operating based on a program written in the ROM. A station for setting an engine compartment in a body assembly process before the above-mentioned painting process, which is collectively constituted in a pack (for example, see the one proposed by the present applicant in Japanese Patent Application Laid-Open No. 61-108080). After the identification number of the vehicle produced from the same ID controller as the ID controller 34 provided therein is given as data, it is mounted in the engine compartment for configuring the vehicle with the identification number, and After that, the vehicle moves along with each car in production until it is removed before the painting process.

When the ID card 32 approaches the ID controller at each station in the vehicle body assembling process, the ID controller transmits a data reception start signal.
The data transmitted by the controller is received and stored in the RAM, and the ID controller transmits a data sending start signal. When the signal is received, the ID controller thereafter stores the data transmission start signal in the RAM. To send data.

The other type of ID card 33 has
It has the same structure as the D card 32 and is made to be heat-resistant, dust-proof and liquid-tight so that it is suitable for use in the painting process. Before the car body assembled in the car body assembly process enters the painting process,
It is installed in a position that does not hinder the painting work of the car body,
At that time, the ID card 32 used in the previous vehicle body assembly process is removed from the engine compartment, and various data stored in the ID card 32 are transferred to the ID card 34 via the ID controller 34.
Moved into 33.

The ID card 33 also has
When approaching the ID controller 34 at each step of middle coating, top coating, etc. and at the entrance of the PBS loading lane 44, the ID controller 34 transmits a data reception start signal. The data transmitted by the ID controller 34 is received and stored in the RAM, and the ID controller 34 transmits a data transmission start signal. When the data transmission start signal is received, the data is thereafter transmitted to the ID controller 34 in the RAM. At the entrance of the PBS loading lane 44,
The ID controller 34 transmits to the carry-in lane 44 an identification number of a vehicle including a painted vehicle body having the ID card 33 and data indicating specifications to be attached to the vehicle.

The identification number and specification data relating to the vehicle entering the PBS loading lane 44 transmitted from the ID card 33 to the ID controller 34 in this manner are sequentially processed from the ID controller 34 via the cell controller 23. The information is transmitted to the computer 17, and the process control computer 17 uses the
The permutation status of a plurality of vehicles on 44 is grasped, compared with the original production permutation data sent from the overall management computer 11, and those vehicles are read from the leading ends of the four loading lanes 44.
The four storage lanes 45 of No. 1 to No. 4 are distributed by changing the order of the storage lanes 45 in which the vehicle is to be inserted next so as to be easily taken out according to the original production order as much as possible.

[0019] Further, a process control computer here.
17 constitutes a so-called expert system so as to function as the specification interval counting means 1 and the unloading vehicle determining means 2 in the system of this embodiment, and a counter comparison 51, a target limitation 52, a candidate selection 53, the same as shown in FIG. Specification selection
54, outgoing vehicle determination 55, counter processing 56, and inference results
For each of the 57 knowledge groups, predetermined processing is executed in accordance with the predetermined conditions in the order of the flow illustrated.

That is, first, in the counter comparison 51, a flag of “can be carried out” is given to a specification that satisfies the condition that the counter value of a certain specification is equal to or larger than the number of set intervals. Here, the above-mentioned counter refers to a counter that counts the number of vehicles (intervals) in which a vehicle having a certain specification flows after a vehicle having a certain specification flows into the vehicle assembling process. (4WD), specification B (sunroof), specification C (airbag), and specification D (air conditioner)
17 is provided in the form of a subprogram, and the set interval number is an interval set in advance so that the work is leveled according to the work load when assembling the specifications in the vehicle assembling process. In this embodiment, for example, specification A (4WD) takes 10 units in consideration of the man-hours for assembling the front and rear wheel drive system, and specification B (sunroof) takes 5 units in consideration of the man-hours for assembling the slide mechanism and the like. The specification C (airbag) has three units in consideration of the man-hours for assembling the acceleration sensor and the like, and the specification D (air conditioner) has two units in consideration of the man-hours for assembling the compressor and the condenser.

Next, in the target limitation 52, in this embodiment, vehicles in the front row and the second row of each of the four storage lanes 45 are set as objects to be unloaded, and the vehicles that cannot be unloaded for reasons other than the specifications are unloaded. Identify vehicles that can
Specifically, in order to prevent the same vehicle from being sent twice, the second row of the storage lane 45 that satisfies the condition that “there is a forwarded car (vehicle once sent) is in the front row of a certain storage lane 45” The vehicle is flagged as "determined" and is excluded from the determination.If the condition "forwarding lane 47 is full" is satisfied, the vehicle cannot be forwarded any further. "A certain storage lane 45 is empty" or "A certain storage lane 45 cannot be withdrawn"
All vehicles in storage lane 45 that satisfy the condition
A flag of “determined” is given to exclude from the determination target.

Next, in the candidate selection 53, among the vehicles in the front row and the second row of each of the four storage lanes 45, "a certain vehicle has not been judged yet (the" judged "flag is given. First, according to the first priority table shown in Table 1 in which the priorities are determined in descending order of the workload, the vehicles satisfying the condition of "not determined) are determined as the target vehicles. A vehicle having a higher priority (a smaller number in the order) is determined as a candidate for carrying out. Here, the circles in Table 1 indicate the specifications of the vehicle, to which the “carry-out allowed” flag is given.

[Table 1] Therefore, for example, when only the specification A and the specification C satisfy the set interval number and are “can be carried out”, the vehicle having the specification B or the specification D is excluded, and the specification of the priority order 7, 12, 14, or 16 is excluded. The vehicle with the highest priority among the vehicles having is designated as the unloading candidate.

[0023] Then, all the vehicles to be determined are checked in accordance with the first priority order table, but if all the vehicles do not correspond to any of the priorities and the carry-out candidate cannot be determined, the following is performed. According to a second priority table in which the priorities are determined in ascending order of the workload shown in Table 2, the vehicle with the highest priority (the number of the rank is small) among the vehicles to be determined is an export candidate. Is determined.
Here, the circles in Table 2 indicate only the specifications of the vehicle, ignoring the presence / absence of the above-mentioned "can carry out" flag.

[Table 2]

Next, in the same specification selection 54, the condition that "a certain vehicle has not yet been judged (the" judged "flag has not been given)" and the specification of a certain vehicle have been judged as "candidate to be carried out" Are the same as the specification of the vehicle that has become the same. " In other words, in principle, only one vehicle is determined to be an unloading candidate. However, in the case of the same specification, a plurality of vehicles are exceptionally allowed.

Next, in the unloading vehicle determination 55, the determination of a vehicle that simultaneously satisfies the condition that “the determination of a certain vehicle is a“ candidate to be unloaded ”” and the condition that “a certain vehicle is in the frontmost row” are determined by “unloading” "Decision" and the vehicle is determined as the unloading vehicle. Therefore, if only one vehicle is determined to be an export candidate, that vehicle is unconditionally determined to be an export vehicle, but if there are multiple vehicles that are determined to be export candidates, the vehicle in the front row is the export vehicle. To decide. If all of the vehicles determined to be unloading candidates are in the same row, a condition that “the original production order of a certain vehicle based on the production plan is the earliest among unloading candidate vehicles” is further imposed, The determination of a vehicle that also satisfies the condition is referred to as “unloading determination”, and the vehicle is determined as the unloading vehicle.

For example, as shown in FIG. 3 (a), in the storage lane 45, the first vehicle in the production order with the specification A is in the front row of lane No. ₁ , and is in the front row of lane No. 2. There is a vehicle D of specification D, and the order of production is 2 in the front row of lane No. 3 with specification A
In the case where there is a vehicle A2 of the No. ₂ and a vehicle B of the specification B in the front row of the lane No. 4 and only the specification A is given the “can carry out” flag, the candidate selection 53 by the same specification selection 54, while the vehicle a ₂ of the vehicle a ₁ and lane No.3 lane No.1 is determined to carry-out candidate, in the unloaded vehicle determined 55, although they are in the same row, lane since the direction of vehicle a ₁ of the No.1 fast production order, the vehicle a ₁ is determined to carry-out vehicle.

For example, as shown in FIG. 3B, the lane No. 1 of the storage lane 45 has the specification B in the front row.
In the second row, there is a _second vehicle A2 in specification A in the second row in the specification A, and in lane No. 2, there is a vehicle C of specification C in the front row and the second row, and in lane No. 3 Is the vehicle B of the specification B in the front row,
In the second row, there is the _first vehicle A1 in production order with specification A,
No. 4 has the same specification as the candidate selection 53 when there is a vehicle D of specification D in the front row and the second row, and when only the specification A is given the “can carry out” flag. by the selection 54, the vehicle a ₁ of the vehicle a ₂ and lane No.3 lane No.1 to determine the second column because there is no candidate vehicle in the front row is determined to carry-out the candidate, the unloaded vehicle determined 55, although they are in the same column, since the direction of the vehicle a ₁ lane No.3 is fast production order, the vehicle a ₁ is determined to be "out determination", it is unloaded vehicle. In this case, the vehicle B in the front row of the lane No. 3 is forwarded as described later.

Further, for example, as shown in FIG.
In lane No. 1 of the storage lane 45, there is a vehicle B of specification B in the front row and a vehicle A of specification A in the second row.
o.2 has a vehicle C of specification C in the front row and the second row,
Lane No. 3 has a vehicle A of specification A in the front row and a vehicle B of specification B in the second row, and lane No. 4 has a vehicle D of specification D in the front row and the second row. In the case where none of the specifications has the “unloadable” flag, according to the second priority table, the candidate selection 53 and the same specification selection 54 are used to select the front row of the lane No. 4 The vehicle D having the specification D in the second row is the unloading candidate, and the unloading vehicle determination 55
The vehicle D in the front row of the lane No. 4 is set as the unloading vehicle.

In the counter process 56, when the condition that "the judgment of a certain vehicle is" decision to carry out "" and the condition that "a certain vehicle has a certain specification" are simultaneously satisfied, a counter corresponding to the specification is set. Reset to zero.
Therefore, when a "take-out decision" vehicle flows from the PBS to the next vehicle assembly process as described later, the counter corresponding to the specification of the vehicle is set to zero. Further, in the counter process 56, when the condition that “the determination of a certain vehicle is“ decision to carry out ”” and the condition that “a certain vehicle does not have a certain specification” are simultaneously satisfied, the counter corresponding to the specification is set to 1 to add. Accordingly, when the "export decision" vehicle is flown from the PBS to the next vehicle assembly process as described later, the counter corresponding to the specification that the vehicle does not have is incremented, and the number of intervals for the specification is counted. You.

Finally, in the inference result 57, the lane No. and the column number of the vehicle satisfying the condition that “the judgment of a certain vehicle is“ decision to carry out ”” are used as the inference result. The resulting data of the lane No. and column number of the unveiled vehicle are transferred to the in-process LAN 29, PB
Via the PLC 30 and the LAN 42 of the S, the operation is transmitted to a plurality of PLCs 43 as the vehicle transport control means 3 for controlling the operation of the overhead conveyor in each lane, and the PLC 43 corresponding to the storage lane 45 of the lane No. of the vehicle determined to be unloaded.
When the column number from the process management computer 17 is No. 1, only the front row outgoing vehicle is used, and when the column number is No. 2, the front row forward car and the second row outgoing vehicle are connected to the outgoing lane 46. The PLC 43 corresponding to the unloading lane 46 sends the vehicle to the next vehicle assembling process when the vehicle sent into the lane is an unloading vehicle, and the PLC 43 when the vehicle sent there is a forwarding vehicle. To the forwarding lane 47,
Returns the transported vehicle sent there to the carry-in lane 44.

Therefore, according to the system of this embodiment,
Even if the original production order is replaced in the body assembly process or the painting process before the PBS, the vehicle is flown to the next vehicle assembly process in the modified permutation so that the work in the vehicle assembly process is leveled by the PBS. Therefore, it is possible to effectively prevent a waiting state and a line stop in a subsequent vehicle assembly process.

Although the present invention has been described based on the illustrated example, the present invention is not limited to the above example. For example, the specification interval counting means 1, the unloading vehicle determining means 2, and the vehicle transport control means 3 are provided separately. A computer may be used, or the specification interval counting means 1, the unloading vehicle determining means 2, and the vehicle transport control means 3 may be formed by a single computer.

[0033]

As described above, according to the PBS permutation correction system of the present invention, even if the original production order is replaced in the body assembly process or the painting process before the PBS, the PBS can be replaced.
In this way, vehicles can be flowed to the next vehicle assembly process in a permutation that has been modified so that work in the vehicle assembly process is leveled. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a configuration of a PBS permutation correction system of the present invention.

FIG. 2 is a configuration diagram showing one embodiment of a PBS permutation correction system of the present invention.

FIGS. 3 (a) to 3 (c) show the case where the system of the above embodiment is P
It is explanatory drawing which shows the example of the permutation correction performed in BS, respectively.

FIG. 4 is a flowchart showing a flow of a knowledge group performed by an expert system in the system of the embodiment for correcting permutations.

[Explanation of symbols]

 1 Specification interval counting means 2 Outgoing vehicle determination means 3 Vehicle transport control means 17 Process management computer 43 Programmable controller (PLC) 44 Import lane 45 Storage lane 46 Export lane 47 Forward lane

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Tamashima 2 Nissan Motor Co., Ltd. 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture (72) Inventor Hiroyuki Takano 2 Takaracho 2 Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Masaaki Inoue 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (56) References JP-A-61-160369 (JP, A) JP-A-61-207277 (JP, A) JP-A-62-15067 (JP, A) JP-A-2-106511 (JP, A) JP-A-5-155369 (JP, A) JP-A-6-31600 (JP, A) JP-A-3-166026 (JP, A) JP-A-6-126600 (JP, A) JP-A-1-222832 (JP, A) JP-A-62-161618 (JP, A) (58) Fields investigated (Int. Cl. ⁶⁾ B62D 65/00 B23P 21/00 307 B65G 43/08

Claims (1)

(57) [Claims] 1. A loading lane arranged after a painting process in a vehicle production process, a plurality of storage lanes branched from a leading end of the loading lane, and a single unloading lane where the storage lanes join. And a rerouting lane that branches off from the middle of the carry-out lane and joins the carry-in lane, wherein the system corrects the permutation of vehicles flowing to the vehicle assembling process after the carry-out lane. Of the plurality of counters provided for each type of specification to be mounted on the vehicle, and the number of intervals set according to the work load required for mounting the corresponding specification, the vehicle determined as the export vehicle has The counter corresponding to the specification that does not exist is incremented, and the counter corresponding to the specification of the vehicle determined as the unloading vehicle is set to zero. Step (1): Among the vehicles in the front row of each of the plurality of storage lanes, a vehicle having a specification corresponding to the counter that has reached the set interval number is set as a determination target, and from the determination target vehicle, A carry-out candidate is selected based on a first priority table determined in the descending order of the workload, and when there is no determination target, the counter in the counter in the front row of each of the plurality of storage lanes is Regardless of the value, a carry-out candidate is selected based on the second priority table determined in ascending order of the workload, and among the vehicles of the carry-out candidate, the vehicle in the frontmost row, and in the case of the same row, the original production order An unloading vehicle determining means (2) for determining the vehicle with the earliest turn as the unloading vehicle, and if the unloading vehicle is in the front row of the storage lane, the vehicle If the vehicle determined as the unloading vehicle is not in the front row of the storage lane, the vehicle in the row before the vehicle is moved from the unloading lane to the transport lane through the unloading lane to the vehicle assembly process. And a vehicle transport control means (3) for flowing the vehicle determined as the unloading vehicle to the vehicle assembling process through the unloading lane. Correction system.