JP2005108046A - Parts lot number recording system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a parts lot number recording system not requiring placement of bar code reading in every assembly process, and preventing deterioration of work efficiency. <P>SOLUTION: A parts box 100 is provided with a machine-readable medium 101 recording a production lot number per production lot of parts. Respective products B1 conveyed on an assembly line are provided with a case 104 for attaching the medium 101 provided on the parts box 100 in a production lot change-over to the product incorporated with the parts in the production lot change-over by a workman. When the medium 101 is in the case 104 when an assembly process of the product incorporated with the parts at the time of production lot change-over wherein the medium 101 is attached is finished, the workman removes the medium 101, and a medium reader 24 is provided for registering the production lot number recorded in the medium 101 in a database along with a product serial number. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a part lot number recording system, and more particularly to a part lot number recording system using a machine-readable medium on which a manufacturing lot number provided for each part manufacturing lot is recorded.

  Conventionally, for products produced at factories, parts received from parts manufacturers are accepted by the parts acceptance department of the factory, the logistics department in the factory transports them to the production process, and the workers assemble the products at each assembly process. It was. The serial number of the product in which the part is assembled and the lot number of the assembled part are recorded in a ledger by the worker, and stored and stored in association with the product serial number.

  As an example of systematizing these operations, Patent Document 1 attaches a barcode label of a product serial number to a product that moves on a production line, and attaches it to a part to be assembled in the process of assembling the part to this product. A technique is disclosed in which a read bar code is read to recognize a part lot number, and the product serial number and the part lot number of the product are stored and stored in association with each other as electronic information.

  On the other hand, in Patent Document 2, a bar code label indicating a part lot number and a part type is affixed to a part box containing a part to be assembled to a product, and a product serial number is also affixed to the product to which the part is assembled. A method of reading a part lot change at a part box replacement timing and associating a product serial number and a part lot number as electronic information is disclosed.

  However, with the conventional method of associating the product serial number with the part lot number, a barcode reader is arranged for every part assembly process in the manufacturing process, and at the timing when all part lots are switched, the parts box Barcodes must be read, it takes time to read, and the part assembly worker will need to do extra work, increasing the number of man-hours, reducing the man-hours of workers when switching parts lots, There was a problem of being bad.

Also, the parts receiving department at the production plant that accepts various parts sent from the parts manufacturer reads the lot number (bar code) attached to the parts lot of the accepted parts, and the delivered parts receive the parts ordered. Because the type and quantity were checked to see if they were the same, there was a work loss of reading the barcode representing the parts lot twice in the parts receiving department and each part assembly department in the manufacturing process. .
JP 7-36997 A JP 63-170774 A

  The problem of the present invention is that a barcode reader must be arranged in every part assembling process of the manufacturing process, which is a problem in the conventional method of associating the product serial number with the part lot number, It takes a long time to read the barcode of the parts box at the timing of switching the parts lot, and the part assembly worker has to do extra work, which increases the work man-hours when switching parts. This is to eliminate the shortage of man-hours for workers and the inefficiency. It is also an object of the present invention to eliminate the work loss of reading the barcode representing the parts lot twice by the parts receiving department and each parts assembling department in the manufacturing process.

  The object of the present invention is to eliminate the need to read and arrange barcodes in all assembling processes in view of the above-mentioned problems, work efficiency does not deteriorate, and a barcode representing a parts lot is assigned to each part receiving department and each manufacturing process. The object is to provide a parts lot number recording system that does not have a work loss of reading twice by the parts assembling department.

  The part lot number recording system according to the present invention is configured as follows in order to achieve the above object.

  The first part lot number recording system (corresponding to claim 1) is a machine-readable medium in which a part box into which a part to be incorporated into a product such as a vehicle is recorded is recorded for each part lot. Each product that flows through the assembly line is equipped with a medium-readable medium that can be attached to the product that incorporates the parts at the time of the production lot change by using the machine-readable medium provided in the parts box when the parts lot is changed by the operator. The assembly line control device includes a case, the assembly line includes an assembly line control device that controls an assembly process in the assembly line, and the assembly line control device instructs supply of components necessary for assembling the vehicle in the assembly line. And a component box remaining number calculating means for calculating the remaining number of component boxes, and whether the database is the number of remaining component boxes calculated by the component box remaining number calculating means. A product that incorporates parts at the time of production lot switching with a machine-readable medium attached and stores the estimated production lot number of the parts incorporated in the vehicle and the product serial number of the vehicle on the assembly line. When the assembly process on the assembly line is completed, if there is media in the media mounting case of the product, the machine-readable media is removed by the operator, and the production lot number recorded on the media is used as the product serial number. It is characterized by having a medium reader that registers in a database along with a number.

  In the second part lot number recording system (corresponding to claim 2), in the above-described configuration, the part manufacturer that manufactures the part preferably uses a medium writing device that records the manufacturing lot number on a machine-readable medium. It is characterized by providing.

  A third part lot number recording system (corresponding to claim 3) is characterized in that, in the above-described configuration, a plurality of types of vehicles are preferably assembled on a product assembly line.

  A fourth part lot number recording system (corresponding to claim 4) is characterized in that, in the above configuration, the machine-readable medium is preferably an IC card.

  According to the above part lot number recording system, the parts box containing the parts to be incorporated into the product such as a vehicle is provided with a machine-readable medium in which the manufacturing lot number is recorded for each part manufacturing lot. Each product that flows through the machine has a medium mounting case in which a machine-readable medium provided in a parts box can be attached to a product incorporating a part at the time of production lot switching by an operator when the part production lot is switched. The assembly line includes an assembly line control device that controls an assembly process in the assembly line. The assembly line control device includes a component supply instructing unit that instructs supply of components necessary for assembling the vehicle in the assembly line, and a component box. A component box remaining number calculating means for calculating the remaining number, and the database is estimated from the component box remaining number calculated by the component box remaining number calculating means. The production lot number of the parts incorporated in the vehicle to be assembled and the product serial number of the vehicle on the assembly line are stored in association with each other, and the product incorporating the parts at the time of production lot switching with a machine-readable medium attached is an assembly line. When the assembly process is completed, if there is media in the media mounting case of the product, the machine-readable media is removed by the operator, and the production lot number recorded on the media together with the product serial number of the product Since it is equipped with a medium reading device registered in the database, it is not necessary to place a barcode reading device in every assembly process, work efficiency does not deteriorate, and a barcode representing a parts lot is sent to the parts receiving department and the manufacturing process. There is an effect that there is no work loss of reading twice by each component assembly department.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments (examples) of the invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a configuration of an entire system to which a part lot number recording system according to the present invention is applied. In this embodiment, the product is, for example, an automobile. In the production factory 10, a variety of vehicles are produced in a production line (assembly line) 11 that produces a variety of vehicles (various specifications).

  The parts lot number recording system 20 includes an assembly line control (ALC) system 21, a production line 11, a linking management system 22, and parts receiving departments 23-1, 23-2, 23-3 installed in the production factory 10. A production line end point device 24, a production planning system 26, a specification management system 27, a parts ordering system 28 that can be installed even in a management department outside the production factory 10, and an invoice issue system 29-1 installed in each parts manufacturer , 29-2, 29-3. In the figure, steps 1 to 9 schematically represent each step in the production line 11. For example, process 1 is a piping and wiring unit process, process 2 is an engine room process, process 3 is an interior unit process, process 4 is an exterior unit process, process 5 is a powertrain exhaust gas unit process, and process 6 is Liquid injection step, step 7 is a tire, spare tire step, step 8 is a seat attachment step, step 9 is a door attachment step, and the like. Display terminal devices 30-1, 30-2,... 30-9 are provided in the vicinity of the production line in each process. Each of the above systems is connected by a telecommunication line, and a communication relationship is formed so that signals, data, and information can be transmitted and received through this telecommunication line.

  The ALC system 21 is produced on the display terminal devices 30-1, 30-2,... 30-9 of each process of the production line 11 according to the production plan (production order plan) received from the production plan system 26. The product specifications are transmitted and displayed, and the parts required for each process are calculated in real time, and the parts receiving and dispensing systems 23-A, 23- provided in the parts receiving departments 23-1, 23-2 and 23-3 are provided. B, 23-C. Further, the production lot number of the part read by the IC card is stored in the production line end terminal device 24 together with the product serial number in the database of the association management system.

  The production line 11 is a line in which various types of conveyors using a flow operation method are combined, and a large number of various components and sub-assembled component units are assembled to the body flowing through the line. A variety of products (various specifications) are produced in the production line 11 at the production factory 10 in the present embodiment.

  The pegging management system 22 is a component of each component specification paid out to each process from the component acceptance / delivery system 23-A, 23-B, 23-C of the component acceptance department 23-1, 23-2, 23-3. The parts lot information of the box is received, and the parts lots on the line side of each process of the assembly line 11 are always identified. Further, the linking management system 22 receives the specifications of the products currently in each process transmitted from the ALC system 21, and uses the information to specify the part numbers to be assembled to the products currently in each process. The part number to be assembled is acquired by comparing with the above, and it is determined that the part is assembled to the product from the parts box of the part in the process by the worker. The lot information of the part and the product serial number are linked and stored in the database.

  The parts receiving departments 23-1, 23-2, and 23-3 are located in the assembly factory 10 and are attached to the delivered parts boxes using the parts receiving and dispensing systems 23-A, 23-B, and 23-C. The code of the machine-readable medium (IC card) of the actual item slip is read, and the parts box is temporarily stored in the storage space of the assembly factory. At the same time as reading the IC card, the location where the parts box is temporarily stored is registered in the parts receiving / dispensing system 23-A, 23-B, 23-C. Furthermore, in the parts receiving / dispensing system 23-A, 23-B, 23-C, the location where the corresponding type of parts box is stored is detected based on the information received from the ALC system. At that time, if the parts are the same, it is desirable to pay out the parts boxes to the assembling process in the order in which the codes attached to the actual product slips of the respective parts boxes are read. If a predetermined parts box is taken out from a predetermined storage location, parts lot information of each part read from a machine-readable medium (IC card) at the time of acceptance can be specified.

  The production line end point terminal device 24 is a terminal for taking out an IC card contained in a box of the product and reading the IC card when the product is completed at the final point of the production line.

  The production planning system 26 creates a production plan for products to be produced in the production line 11 that produces a wide variety of products, and creates a production order plan that defines the order of actual production in the factory according to the production plan. It is a system to create.

  The specification management system 27 registers and manages part specifications used for various types of products. Specifically, a parts list for each vehicle type is registered, and if a vehicle type is specified, a part necessary for assembling the vehicle type can be searched.

  The parts ordering system 28 calculates the required amount of parts according to the produced production plan, determines the delivery date / time and quantity for each part manufacturer, and places an order.

  The actual product slip issuing systems 29-1, 29-2, and 29-3 are installed in a component manufacturer that manufactures components, and include a medium writing device that records a manufacturing lot number on a machine-readable medium (IC card). ing. When a part is delivered to a product factory at a specified date and time, an actual product slip is attached to the delivered part in order to identify ordering information on the ordering side. The actual product slip also includes a lot number, which is an arbitrary number for identifying a production lot of parts. In this example, an IC card is used as a machine-readable medium that is input using this system, and the part number, quantity, and part lot information are encoded and delivered to an assembly plant. The writing to the IC card and the writing of the actual product form are written in a unified standard format based on the part order received from the part ordering system 28.

  FIG. 2 is a flowchart for explaining the outline of creation of association data (data in which a product serial number and an assembled part lot number are associated) in an actual process in the association management system 22. First, the association management system 22 identifies the specifications of the product in the process from the ALC system 21. For example, it is recognized as a sedan for North America (step S10). Next, the specification management system 27 is used to search for the types of parts to be assembled in this process to the North American sedan (step S11). It is determined by searching the data of the parts receiving / dispensing systems 23-A, 23-B, and 23-C whether or not the type of the searched parts is being transported in the process (step S12). As a result, when the type of the retrieved part is not conveyed on the process, error processing is performed (step S17), and the process ends. When it is determined that the type of the retrieved part is being transported on the process, the pegging management system 22 is still in the parts box from the timing when the lot of the part has changed and the serial number of the product used. It is determined whether there are any remaining parts (step S13). If it is determined that no parts remain in the parts box, error processing is performed (step S17), and the process ends. If it is determined that there are still parts in the parts box, it is determined that the parts are assembled from the parts box to the product in the process, and the lot number is read (step S14). The product serial number of the product and the manufacturing lot number of the part are stored in the database of the association management system 22 (step S15). Next, it is determined whether the work has been completed (step S16). If the work is not finished, step S10 is executed again. If the work is finished, it is finished.

  Thus, since the product serial number of the vehicle and the production lot number of the parts mounted on the vehicle are stored in the database, if the product serial number of the vehicle is known, the production lot number of the parts mounted on the vehicle If the manufacturing lot number of a part is known, the product serial number of the vehicle on which the part is mounted can be identified.

  Next, an example of the entire process of the part lot number recording system will be described with reference to the flowcharts of FIGS. 3 to 5 and the tables shown in FIGS.

  First, a production plan for a product to be produced is created in a line for producing a variety of products by the production planning system 26 (step S20). This production plan usually includes, for example, the status of orders received from customers and expected production products other than orders, and is initially shown in FIG. 7 for each MTC (model (M), type (T), color (C)). The number is set as shown in Table 1. In Table 1, column C10 represents MTC, column C11 represents vehicle type, column C12 represents normal or 4WD drive, column C13 represents domestic or export destination, and column C14 represents the number of vehicles. In the production planning system 26, by using the production order plan creation method included in this system, the order of products produced on the day (production order plan) is determined. Then, the production plan (production order plan) is transmitted to the parts ordering system 28 (step S21).

  Next, the part ordering system 28 that has received the production plan from the production planning system 26 retrieves the part specification from the specification management system 27 that registers and manages the part specifications used for various types of products, and creates the produced production plan. Accordingly, the required amount of necessary parts is calculated (step S22). This is done as follows. The parts used depend on the specifications of the products according to the MTC in the production plan that has been sent. These are managed by the specification management system 27, and Table 2 shown in FIG. 8 is obtained using this information. In Table 2, column C20 represents MTC, column C21 represents vehicle type, column C22 represents normal or 4WD drive, column C23 represents domestic or export destination, and column C24 uses part A. Column C25 indicates whether or not the component B is used, column C26 indicates the type of component C, and column C27 indicates the type of component D. As can be seen from Table 2, the parts A and B are used for all products produced on the day, but the parts C and D are different depending on the MTC. That is, C01 is used for vehicles with MTC of N, P, S, T, W, and X, and C02 is used for vehicles with MTC of Q, R, U, V, Y, and Z. The component D uses D11 for MTC N and Q, D12 for MTC P and R, D21 for MTC S and U, D22 for MTC T and V, and MTC W and Y Uses D31, and MTC uses X32 and D32. By combining Table 1 shown in FIG. 7 and Table 2 shown in FIG. 8, the number of parts necessary for production of the product on the day is calculated. This is shown in Table 3 shown in FIG. In Table 3, column C30 represents the part name, column C31 represents the MTC to be applied, and column C32 represents the required number of corresponding components. Based on the required amount (required number) of the parts shown in Table 3, the parts ordering system 28 determines the delivery date / time and quantity for each part manufacturer and places an order (step S23).

  The parts manufacturer that has received the parts order manufactures the parts (step 24), and uses the invoice issue systems 29-1, 29-2, and 29-3 to display the supplier code, item, and part number as shown in FIG. Then, a component color, component lot information (manufacturing lot number), and the number of accommodations are encoded to create a machine-readable medium, in this example, an IC card (step S25). The IC card is attached to the parts box containing the parts and shipped to the assembly factory (step S26).

  Next, as shown in FIG. 4, in the parts receiving department, when the parts are delivered, ICs attached to the delivered parts box are used by using the parts receiving and dispensing systems 23-A, 23-B, and 23-C. The card code is read (step S27), and the parts box is temporarily stored in the storage space of the assembly factory. At the same time as reading the IC card, the location where the parts box is temporarily stored is input to the parts receiving / dispensing system 23-A, 23-B, 23-C, and the parts receiving / dispensing system 23-A, 23-B is entered. , 23-C (step S28).

  Next, the processing of this system when producing a car on the production line will be described with reference to the flowchart of FIG. First, the production planning system 26 transmits a production plan (production order plan) to the ALC system 21 (step S40). Receiving the production plan, the ALC system 21 creates a production setup instruction for each process (step ST41). The prepared instruction for each process is transmitted to the line terminal on the line side of the production line and also transmitted to the linking management system (step S42). The line terminal displays the received setup instruction on the display device (step S43). The worker performs assembly work in each process according to the setup. Next, the component shake necessary for each process is calculated in real time and transmitted to the component receiving and dispensing systems 23-A, 23-B, and 23-C (step S44). In the parts receiving / dispensing systems 23-A, 23-B, and 23-C that have received the parts arrangement instruction, the parts are paid out to each process (step S45). At that time, the parts receiving / dispensing system 23-A, 23-B, 23-C detects the location where the corresponding type of parts box is stored based on the part information received from the ALC system 21, and displays the location. To do. The worker takes out the corresponding parts box from the displayed storage location and transports it to the line side. The part information such as the manufacturing lot number of the corresponding part is transmitted to the linking management system (step S46).

  The linking management system 22 receives the part lot information of the parts box of each part specification delivered to each process from the parts acceptance / delivery system 23-A, 23-B, 23-C, and A lot of parts on the line side is always identified. Further, the linking management system 22 receives the specifications of the products currently in each process transmitted from the ALC system 21, and uses the information to enter the part numbers to be assembled into the products currently in each process to the specification management system. The part number to be assembled by collation is acquired (step S47), and it is determined that the part is assembled to the product by the worker from the part box of the part in the process. The lot information of the part and the product serial number are linked and stored in the database (step S48). It is determined whether or not a predetermined quantity before the parts in the parts box are exhausted (step S49). When the number of parts reaches a predetermined number, the ALC system is notified that the number of parts has reached a predetermined number (step S50). The ALC system instructs the part again (step S44). When the vehicle on the production line is finished, if the IC card is in the case, the IC card is read by the production line end point terminal device and the lot number is input (step S51). The manufacturing lot number is transmitted to the ALC system 21 (step S52), and is transmitted to the linking management system 22 together with the corresponding product serial number of the vehicle body (step S53), and the parts lot of the linking management system 22 stored in the database. It is determined whether the correspondence with the product serial number of the vehicle from the information matches (step S54). When matching with the product serial number from the part lot information of the linking management system 22 is matched, it is stored in the database as it is (step S55). It is displayed on the line end terminal device (step S56).

  Steps S27 to S50 will be described more specifically with reference to the tables shown in FIGS. Parts delivered from a parts maker are housed in a parts box. However, since the parts box is different for each part, the number of parts accommodated per part box is different. This is shown in Table 4 shown in FIG. In Table 4, a column C40 represents a component name, and a column C41 represents a component box accommodation number. For example, component A has a component box accommodation number of 50, and component B has a component box accommodation number of 60. Further, the production ranking plan created by the production planning system is shown in Table 5 shown in FIG. In Table 5, column C50 represents a serial number, column C51 represents a vehicle type, column C52 represents 4WD or normal driving, column C53 represents a domestic or export destination, column C54 represents MTC, and column C55. Represents the line insertion time. The production process is shown in Table 6 shown in FIG. In Table 6, a column C60 represents a process, a column C61 represents a part to be traced, and a column C62 represents an arrival time after input. For the sake of simplicity, assuming that the product production line flows in 1 minute tact (the time given to the work of one process), if the time to the work place is added to the time put in the line, the relevant The time spent working on the product can be calculated.

  In other words, as shown in Table 6 of FIG. 12, a product to be worked arrives at step 10 which is a step of assembling the part C 10 minutes after the line is put in. As shown in Table 5 of FIG. 11, the product serial No. 15 is input at 8:44, so that the process 10 arrives at 9:54.

  In each process, since there is no part to be assembled in the product, the work cannot be performed. Therefore, the MTC product to be assembled is planned to be transported from the parts receiving department to each process before reaching each process. For example, the part A used on the day assembled in the process 3 is 8:30 on the line input time when the serial number 1 that is the first product on the day arrives, and 8:33 on the third part. I need it. Although it may arrive at the last minute, it is planned to arrive at 8:28 with a certain margin (for example, 5 minutes).

  On the other hand, if all parts used on the day are transported at the same time, the space in the line workshop will be narrowed, and mistakes may occur if there are similar parts. At a certain time, a parts transportation plan is prepared in which the required amount is stored in the parts box and delivered. For example, as shown in Table 4 of FIG. 10, in the case of the part A, since the number of parts stored in one part box is 50, only 50 parts are stored on the line side at the time described above (8:28). Parts are transported. Since this part A is used for all products manufactured on the same day, one piece is consumed per minute and the 50th unit from the start of manufacture, and the part box for part A will be empty after 50 minutes.

  The ALC 21 calculates from the relationship between the production order plan and the product specifications, and creates the next parts transportation plan. Based on this plan, the part A from the parts receiving department transports the second part box to the process 3 at 9:18.

  As in the case of the part A, it is easy when there is a single part to be assembled in the product in one process, but in a process having a plurality of types of parts assembled in the process, the result is as shown in Table 7 shown in FIG. (A) of Table 7 represents the part number C401 (4WD) for lot number C401, column C70 represents the number of components, and column C71 represents the serial number of the assembled vehicle. (B) in Table 7 represents the part number (20WD) for the lot number C20, the column C72 represents the number of components, and the column C73 represents the serial number of the assembled vehicle. Further, (c) in Table 7 represents the part number C402 (4WD) for the lot number C402, the column C74 represents the number of components, and the column C75 represents the serial number of the assembled vehicle. (D) in Table 7 represents the part number (20WD) for the lot number C20, the column C76 represents the number of components, and the column C77 represents the serial number of the assembled vehicle. (E) in Table 7 represents the part number C03 (4WD) for lot number CC03, column C78 represents the number of components, and column C79 represents the serial number of the assembled vehicle. (F) in Table 7 represents the part number C20 (2WD) for the lot number C20, the column C80 represents the number of components, and the column 81 represents the serial number of the assembled vehicle. For example, as shown in Table 6 of FIG. In addition, as shown in Table 4 of FIG. 10, there are two types of parts C, 4WD and normal 2WD. Further, the number of parts C accommodated in the parts box is different for 4WD and 2WD. That is, as shown in Table 4, the number is 25 for C02 (for 4WD) of component C and 20 for C01 (for 2WD).

  Referring to the production order plan table, the parts are used as shown in Table 7 shown in FIG. That is, the product for the day arrives at the assembly process 10 for the part C at 8: 30 + 9: 8: 39. The first assembled part C (for 4WD) is transported at 8:34, 5 minutes before 8:39. The parts box contains 25 parts C (for 4WD). Referring to the production order of products, since the same MTC products up to serial number 25, the same part C (for 4WD) is used (Table 7 (a)), but the MTC changes from serial number 26. As shown by an arrow Y10 in FIG. 13, the used part changes, and the part C (for 2WD) is used (Table 7 (b)). Part C (for 2WD) contains 20 parts boxes. It will be transported at 8:59, 5 minutes before 9:04, when parts C (for 2WD) will be used.

  In this state, in the process 10 for assembling the part C, the 4WD for the part C and the 2WD for the part C are placed at the same time. That is, in this example, from 8:59 to 9: 3, two types of parts boxes are placed under the operator of the process 10. Furthermore, according to the production order plan, the part C (for 2WD) will be empty after 20 minutes, so the next part box must be transported to the process 10 5 minutes before 9:24. . When the parts box is changed with the same parts as indicated by the arrow Y11, the parts production lots of the manufacturers that produce the parts may be different.

  According to the production order plan, there is an MTC product that assembles part C (for 4WD) in process 10 at the stage when five pieces from the second part box of part C (for 2WD) shown in Table 7 (d) are used. come. Since the parts box of part C (for 4WD) shown in Table 7 (a) has been emptied by assembling to the product at 9: 3, serial number 51 is placed on the line at 9:20. It is put in, and as shown by the arrow Y12, use begins at 9:30, 10 minutes after that. Therefore, the second part box of the part C (for 4WD) shown in Table 7 (c) is transported at 9:25. At this stage, a parts box in which 15 parts C (for 2WD) shown in Table 7 (d) remain and a second parts box of parts C (for 4WD) shown in Table 7 (c) are placed. Will be. After using part C shown in Table 7 (c), use part C (for 4WD) shown in Table 7 (e), use up to 9 parts, and then use part C (for 2WD) shown in Table 7 (d) ) As shown by an arrow Y13. When 20 parts C (for 2WD) shown in Table 7 (d) have been used, the parts are assembled from the parts box of the next part C (for 2WD) shown in Table 7 (f) as indicated by arrow Y14.

  Next, with reference to FIG. 14, an example of recording the manufacturing lot number of parts on the production line of the production factory 11 will be specifically described. In the parts lot number recording system of the present invention, a parts box in which parts to be incorporated into a vehicle are provided with a machine-readable medium in which the manufacturing lot number is recorded for each part manufacturing lot, and flows through an assembly line of the vehicle. Each vehicle is provided with a medium mounting case that can be mounted on a vehicle in which a machine-readable medium provided in a parts box is switched by a worker when a part lot is switched, and is mounted on the vehicle incorporating the part at the time of switching the manufacturing lot. When a vehicle incorporating a part to which a production lot is switched with a medium installed finishes the assembly process on the assembly line, if the medium is contained in the vehicle medium installation case, a medium that can be read by the machine is inserted by the operator. A medium reading device is provided for removing and registering the production lot number recorded on the medium together with the vehicle production number in the database. That.

  First, an IC card 101 is attached to a part from the parts warehouse of the parts receiving departments 23-1, 23-2, and 23-3 to the parts box 100 and is carried to the line side 102 in the assembly process. When the vehicle body B1 enters the line, the worker 103 attaches the medium (IC card) attachment case 104 to the body B1 (FIG. 14A). In the production line 11, an operator 105 attaches an IC card 101 in which information such as a part number and a manufacturing lot number attached by a parts supplier is recorded to a vehicle body to a parts box 100 in which a lot of parts to be assembled to the vehicle B1 is changed. It is inserted into the case 104 or the like (FIG. 14B). The IC card 101 is inserted into the case 0104 at the place of the component box 100. If necessary, attach two cases on the left and right. The mounting location can be moved so as not to interfere with the work. When the production line is off (FIG. 14C), the worker 106 takes out the IC card 101 from the case 104 attached to the vehicle body, and uses the medium reading device 24a of the production line end point terminal device 24 to obtain information on the IC card 101. Read and store it in the database along with the serial number of the car body. Then, it is confirmed by checking whether the correspondence between the number by the IC card and the estimated information in the association management system 22 match. The confirmation result is displayed on the production line end point terminal device 24. If the IC card 101 is not present in the case 104, the production lot number previously input with the product serial number is automatically allocated and stored in the database.

  FIG. 15 is a diagram showing the flow of vehicles on the production line 11 when this system is used. Vehicles with product serial numbers 001 to 025 are vehicle type A, vehicles with product serial numbers 026 to 047 are vehicle types B, vehicles with product serial numbers 048 to 050 are vehicles with vehicle type C, and product serial numbers 051 to 076. Vehicle type D, vehicles with product serial numbers 077 to 085, vehicle type E, and vehicles with product serial numbers 086 to 121, vehicle type F. At this time, the vehicle type A, the vehicle type D, and the vehicle type E are the parts A (for 4WD), the parts B, and the parts C, and the vehicle types B, C, and F are the parts A (for 2WD), the parts B, and the parts C. It is done. In the vehicle of product serial number 001, parts A (4WD), B, and C are lot-switched, and an IC card is attached to the parts box. Shed. When it becomes the vehicle of the product serial number 026, since it is changed to the vehicle type B, the part A (4WD) is changed to the part A (2WD) and becomes a new lot, and the IC card is put in the case of the vehicle. Further, in the vehicle having the product serial number 047, lot switching of the part A (2WD) is performed, and the IC card is put in the case of the vehicle. When the vehicle has the product serial number 051, both the parts A (4WD) and B are switched to the lot, and the IC card is placed in the case of the vehicle having the product serial number 051. When the part C of the product serial number 061 is lot-switched, the IC card is placed in the case of the vehicle. When the part A (2WD) is lot-switched in the vehicle having the product serial number 076, the IC card is put in the case of the vehicle. Parts A (2WD) and B in the vehicle of product serial number 101 are lot-switched. If the part C of the product serial number 121 is switched to a lot, the IC card is placed in the case of the vehicle. In this way, the IC card is inserted into the case of the vehicle when the lot is switched.

  Whenever the vehicle flowing through the production line 11 comes to the end point (FIG. 14C), if the IC card is in the case, the production line end point terminal device 24 reads the IC card. The product serial number at that time is also recorded, and recorded in the database together with the part production lot number. For example, in this example, the parts A (4WD), B, and C of the production lot number 1 are mounted from the vehicle of the product serial number 001, and the parts A (4WD) of the lot number 1 are mounted up to the vehicle of the product serial number 025. Is recorded. The part A (4WD) of the production lot number 2 is mounted on the vehicle having the product serial number 051, and the next production lot number 3 is mounted from the vehicle having the product serial number 076. The part B with the production lot number 2 is mounted from the vehicle having the product serial number 051. The part C with the production lot number 2 is mounted on the vehicle having the product serial number 061. The part A (2WD) of the production lot number 1 is mounted on vehicles having product serial numbers 026 to 046. The part A (2WD) of the production lot number 2 is mounted on the vehicles having the product serial numbers 047 to 100. The part A (2WD) of the production lot number 3 is mounted on the vehicle having the product serial number 101 to 121, and the part C of the production lot number 3 is mounted on the vehicle of the product serial number 121. Each time a vehicle in which these IC cards are inserted arrives at the end of the line, the production lot number is input by the IC card together with the product serial number. As a result, a vehicle with product serial numbers 001 to 025 is mounted with a part A (4WD) with manufacturing lot number 1, a part B with manufacturing lot number 1, and a part C with manufacturing lot number 1 in the database. Is recorded. It is recorded that vehicles with product serial numbers 026 to 046 are mounted with a part A (2WD) with a production lot number 1, a part B with a production lot number 1, and a part C with a production lot number 1. It is recorded that vehicles with product serial numbers 047 to 050 are mounted with part A (2WD) of production lot number 2, part B of production lot number 1, and part C of production lot number 1. It is recorded that vehicles having product serial numbers 051 to 060 are mounted with a part A (4WD) with a production lot number 2, a part B with a production lot number 2, and a part C with a production lot number 1. It is recorded that vehicles with product serial numbers 061 to 075 are mounted with part A with production lot number 3, part B with production lot number 2, and part C with production lot number 2. It is recorded that vehicles with product serial numbers 076 to 85 are mounted with part A (4WD) of production lot number 3, part B of production lot number 2, and part C of production lot number 2. It is recorded that vehicles with product serial numbers 086 to 100 are mounted with part A (2WD) of production lot number 2, part B of production lot number 2, and part C of production lot number 2. It is recorded that vehicles having product serial numbers 101 to 120 are mounted with a part A (2WD) with a production lot number 3, a part B with a production lot number 3, and a part C with a production lot number 2. It is recorded that the vehicle with the product serial number 121 is mounted with the part A with the production lot number 3, the part 3 with the production lot number 3, and the part C with the production lot number 3.

  In this way, the product serial number of the vehicle and the production lot number of the parts mounted on the vehicle are recorded in the database. Therefore, if the product serial number is known, the production lot number of the parts mounted on the vehicle can be determined. If the manufacturing lot number of a part is known, the product serial number of the vehicle on which the part is mounted can be identified.

  INDUSTRIAL APPLICABILITY The present invention is used in a production process in which a production lot number and a product serial number of parts incorporated in a product are associated with each other and recorded in a database.

It is a figure which shows the structure of the whole system to which the parts lot number recording system which concerns on this invention is applied. It is a flowchart explaining preparation of linked data. It is a whole process flowchart of the parts lot number recording system which concerns on this invention. It is a whole process flowchart of the parts lot number recording system which concerns on this invention. It is a whole process flowchart of the parts lot number recording system which concerns on this invention. It is a figure which shows the content recorded on an IC card. It is a table | surface which shows the number of production according to MTC. It is a table | surface which shows the required components according to MTC. It is a table | surface which shows required number of parts. It is a table | surface which shows the number of parts box accommodation for every part. It is a table | surface which shows a production order plan. It is a table | surface which shows a production process. It is a table | surface which shows the production process in the process with multiple types of components. It is a figure which shows the operation | work when recording the manufacturing lot number of the components in a production line. It is a figure which shows the flow of the vehicle in a production line, and parts lot switching.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Production factory 11 Production line 20 Parts lot number recording system 21 ALC system 22 Pegging management system 23-1 Parts receiving department 23-2 Parts receiving section 23-3 Parts receiving section 24 Production line end point device 25 Lot change notice device 26 Production Planning System 27 Specification Management System 28 Parts Ordering System 29-1 Item Tag Issuing System 29-2 Item Tag Issuing System 29-3 Item Tag Issuing System

Claims (4)

The parts box containing the parts to be incorporated into the product has a machine-readable medium in which the production lot number is recorded for each production lot of the parts.
Individual products flowing through the assembly line of the products are attached to a product in which the machine-readable medium provided in the parts box is incorporated in the parts at the time of the production lot change when the parts lot is changed by the operator. With media mounting case,
The assembly line includes an assembly line control device that controls an assembly process in the assembly line,
The assembly line control device includes parts supply instruction means for instructing supply of parts necessary for assembling a vehicle in the assembly line;
A component box remaining number calculating means for calculating the remaining number of parts box,
The database stores a manufacturing lot number of a part incorporated in a vehicle estimated from the remaining number of parts box calculated by the remaining part box calculation means and a product serial number of the vehicle on the assembly line in association with each other. ,
When the product in which the product at which the machine-readable medium is attached and incorporating the parts at the time of production lot switching is finished the assembly process in the assembly line, the medium is contained in the medium attachment case of the product. A part lot number recording system comprising: a medium reader for removing the machine-readable medium by an operator and registering the production lot number recorded on the medium together with a product serial number of the product in a database. .   2. The part lot number recording system according to claim 1, wherein a part manufacturer that manufactures the part includes a medium writing device that records the manufacturing lot number on a machine-readable medium.   3. The parts lot number recording system according to claim 1, wherein a plurality of vehicle types are assembled in the product assembly line.   4. The part lot number recording system according to claim 1, wherein the machine-readable medium is an IC card.

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