JP2003099111A - Lot management device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lot management device capable of easily preparing lot numbers after the division or composition of lots without making it necessary to retrieve any lot number before the division or composition of the lots. SOLUTION: Lot numbers are divided into an original part which is invariable before and after the division or composition of lots and a dividing/compositing part which is variable before and after the division or composition of lots, and new lot numbers are generated by the original part and the dividing/ compositing part at dividing or compositing lots. Also, the lot numbers are made correspond to the signboard ID of a production instruction plate so that the history of the lot states made correspond to the signboard ID can be stored, and that the history of the lot states can be retrieved by using the signboard ID. Moreover, the central part of a circular production instruction plate 161 is attached with a two-dimensional code, and it is placed on a shooter 168 so that the production results can be automatically read at the fixed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lot management device in a production system for producing products or parts.

[0002]

2. Description of the Related Art When a product is manufactured by being processed and assembled through a plurality of manufacturing processes, a certain number of quantities are collectively manufactured as a lot in the manufacturing process in consideration of setup property, transportation, ordering unit, etc. .

During the production of such a lot,
If a product defect is found in the middle of a process, examine the product flow history in that process and analyze how the products in the same lot flowed in the manufacturing process that caused the defect. Lot trace is performed to identify defective lots.

More specifically, it is marketed as a product,
When a defect is found in the downstream process, it is necessary to search the recorded lot status in order to quickly and accurately identify the product made under the same conditions in the manufacturing process that caused the trouble, and the scale of damage. This is important in suppressing the loss due to the occurrence of defects. If the cause of the failure cannot be identified, it is necessary to collect even unrelated ones, which increases time loss and collection cost. For this reason, it is required to easily and accurately search for products or parts.

Since the number of lots in each process differs depending on the manufacturing process, the unit of the lot made in the previous process is divided or combined to change the number of lots to be the quantity of the lot in the manufacturing process. Produce together. The division or combination of lots includes cases where some of the lots are changed to different lots or are combined with other lots due to occurrence of product rework.

Therefore, when performing a lot trace, the history of division or combination is checked to search for a related lot, and a defective lot is specified.

The present invention, in such lot management,
Numbering is performed so that the division source and the combination source lot can be specified in the lot division or combination operation, and the Kanban I on the production instruction board used in the Kanban production during process flow is used.
The present invention relates to a lot management apparatus that records a history using D so that lot tracing can be performed easily and efficiently.

The conventional method of assigning a lot number is as follows:
Each time a new lot is generated by adding a series of serial numbers, the number obtained by adding 1 to the lowest number of the serial number is used as a new lot number.

When carrying out kanban production, "instruction kanban" and "takeover kanban" are used as production instruction information, and lot numbers are not used. "Instruction Kanban"
The information is information including the name of the product to be produced, the quantity, the storage location of the finished product, and the like. The "collection kanban" is information including the name, quantity, and storage location of the product to be collected.

[0010]

According to the above-mentioned conventional lot number assigning method, even if a lot is divided or combined, the next number of the lot number immediately before the division or combination is a new serial number. Because it is given as a number,
There is no relation between this new serial number and the lot number before division or before synthesis. Therefore, there is a problem that it is difficult to retrieve the original lot number before division or before combination.

There is also a method of storing a correspondence between a lot number before division or combination and a lot number after division or combination in a database. In this case, in a memory for storing such a correspondence relation. There is also a problem that the storage area becomes large, and it takes time and labor to search the original lot number to obtain a new lot number after division or combination.

Further, in the case of kanban production in which production is carried out using kanban, the instruction kanban and take-back kanban are used as production instruction information. However, in the case of lot tracing, a tracking travel sheet for tracking the kanban is used. You have to search using. Therefore, in order to perform lot tracing, a travel sheet must be input in addition to the above production instruction information, and there is a problem that double labor is required.

Further, since the assigned lot number is input to the computer by the code reader, there is a problem that a lot number input operation is required and a lot of man-hours are required for assigning the lot number.

It is an object of the present invention to pay attention to the fact that the above problems occur due to special processing such as lot division processing and combination processing, and uses a part of the lot number before division or combination. By creating a unique lot number after division or combination, it is possible to easily create a lot number after division or combination without having to search for the original lot number before division or combination.

Another object of the present invention is to associate a Kanban ID with a lot number so that at least a location indicating a place where a track record has been achieved is input as a search condition without the need to enter a travel sheet corresponding to the lot number. Just to be able to search the production history of products and parts.

Still another object of the present invention is to write a product number and kanban ID in a two-dimensional code in the center of a circular production instruction plate and automatically read the product number and kanban ID at a fixed position of a shooter having a slope. It is to enter the production results automatically.

[0017]

In order to solve the above-mentioned problems, the lot number is divided into an original part which is unchanged before and after lot division or combination and a division / composition part which is changed before and after lot division or combination. The lot number ledger storage unit 25 that stores the original portion and the original portion that is stored in the lot number ledger storage unit when dividing or combining a plurality of
It is possible to employ a means that includes a lot organization processing unit 22 that generates a new lot number with the combining unit.

According to this means, since the original part does not change before and after lot division or combination, it is possible to easily grasp the correspondence between lot numbers before and after lot division or combination, and therefore before or after lot division or combination. It will be easier to find the original lot number of.

In order to solve the above-mentioned problems, the lot number assigned to the lot of the product or part in the process of production control is associated with the unique kanban ID of the production instruction board, and the kanban ID is used to determine the lot status. It is possible to employ means adapted to search the history.

According to this means, the lot trace can be carried out only by inputting the kanban ID into the lot management device, so that the input of the travel sheet becomes unnecessary,
The input operation for lot history search is simplified.

Further, in order to solve the above-mentioned problems, a plurality of circular production instruction plates 161 to 165 in which a product or part number and a kanban ID are recorded by a two-dimensional code in the central portion.
And a reading device 166 for reading the Kanban ID on the production instruction plate existing at the lowest position of the shooter, and a shooter 168 having the production instruction plate mounted adjacent to each other on the inclined surface. Kanban on production instruction board
When D is read by the reading device and the production instruction plate existing at the lowermost portion is removed from the shooter and attached to the corresponding product or component, the production instruction plate existing immediately above the extracted production instruction plate is gravitated. Thus, it is possible to employ a means that rolls down to the lowest position and the Kanban ID on it is read by the reading device.

By this means, the Kanban ID reading operation is automatically performed only by placing the production instruction plate on the shooter.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a lot management device according to an embodiment of the present invention. In the figure, the lot management device 11 indicates a production instruction Kanban I for a product or a part.
D or a takeover kanban ID (hereinafter simply referred to as kanban ID) and a lot generation processing unit 13 that receives data from the performance collection device 12 that outputs a processing code and performs a lot generation process, and creates a lot status history. A lot tracking processing unit 14 and a lot state searching processing unit 16 for performing lot state searching processing while interfacing with the lot searching apparatus 15 are provided. Achievement collection device 1
2 collects the kanban ID and the processing code from the production instruction plate 161 read by the reading device 166 described later with reference to FIG. 16 and outputs them to the lot management device 11.
The content of the processing code includes information regarding whether the processing content of the lot management is a lot division processing, a lot combination processing, or a lot actual processing (new lot generation processing).

FIG. 2 shows the lot generation processing unit 13 in FIG.
3 is a block diagram showing an outline of the configuration of FIG. In FIG.
The lot generation processing unit 13 reads the kanban ID and the processing code from the performance collection device 12, and reads the production instruction ID to analyze whether the processing corresponding to the kanban ID is a lot division processing, a combination processing, or a performance processing. A processing code analysis processing unit 21 (hereinafter referred to as the analysis processing unit 21),
A lot formation processing unit 22 that forms a lot according to the analysis result of the analysis processing unit 21, an ID association processing unit 23 that associates a Kanban ID with a lot number, and a process flow used to check the work procedure are stored. The process flow master storage unit 24 and the lot number ledger storage unit 25 for storing the latest lot number are provided.

The contents of the process flow master include, for each process (that is, for each lot), the product or part number, a plurality of process blocks corresponding to each product number, a plurality of processes included in each process block, and a plurality of next processes. Blocks, multiple subsequent processes included in each subsequent process block, product number of the next product or part, actual record classification, processing lead time when the product or part is manufactured, and the number of products or parts used ing. The performance record classification is a classification of the update contents when the lot status is updated, and information on whether the lot status is updated or not, and whether the lot status is updated or not is recorded.

The lot number register storage unit 25 stores only the original portion of the latest lot number, and does not store the division / synthesis unit. The original part and the division / synthesis part will be described later.

FIG. 3 is a block diagram showing an outline of the configuration of the lot tracking processing unit 14 in FIG. In FIG. 3, the lot tracking processing unit 14 includes a lot division processing unit 31, a lot combination processing unit 32, a lot state updating unit 33, a lot state table 34, and a production in which a Kanban ID and a lot number are associated with each lot. An instruction ID associating unit 35 and a lot state history storage unit 36 are provided.

The lot status table 34 includes, as a set, a lot number, a lot status, a location, a process flow, and a Kanban ID for each lot.

A lot number, lot state change, date and time, location, worker, lot size, lot comment, supplementary information, and kanban ID are stored in the lot state history storage unit 36 for each lot.

FIG. 4A is a block diagram showing an outline of the configuration of the lot status search processing unit 16 in FIG. In the figure, the lot status search processing unit 16 includes a lot status history search unit 41 that interfaces with the lot search device 14 and a parts table storage unit 42.

FIG. 4B is a diagram showing an example of the parts table stored in the parts table storage unit 42.

FIG. 4C is a diagram showing a tree structure derived from the contents of the table shown in FIG. As shown in the figure, the parts list stores the part number of the parent part, the part number of the child part, and the number of pieces used.

In the actual search, this parts table is used to display the product numbers not registered in the process flow in the process flow master storage unit 24.

By making the lot number always unique, it is possible to perform high-speed retrieval when performing lot retrieval.
In a production site, when a similar product is repeatedly processed or produced, an instruction kanban (also referred to as a production instruction plate) is used to instruct the processing or the production, but not a lot number. Therefore, in the embodiment of the present invention,
In order to manage the kanban ID by associating it with the lot number, the kanban ID is read by the production instruction ID reading / processing code analysis section 21 from the performance collection device 12 at the time of the production instruction, and the kanban ID is produced by the production ID associating section 35. And the lot number are associated with each other. As a result, it is possible to record the production history such as the actual results thereafter by using the Kanban ID.

This correspondence is based on the lot number and kanban I in the lot state table 34 after the lot number is generated by the lot organization processing unit 22 when processing or production is instructed.
D is written, and the production ID associating unit 35 records the Kanban ID and the lot number in association with each other.

When the lot disappears, the lot state table 34
Delete the information of the relevant lot number from. This allows
It is possible to use the same kanban ID in association with a newly generated lot number.

In the lot number ledger storage unit 25, only the original portion of the latest lot number is stored, and the division / combination portion is not stored. The original part with the latest lot number is created only when a new lot is created according to a processing or production instruction.

When lots are generated, divided, or combined, the correspondence between the designated kanban ID and the lot number or the correspondence between the take-back kanban ID and the lot number is changed, so that the designated kanban ID and the new lot are again designated. Correspondence with the number or withdrawal kanban and a new lot number.

FIG. 5 is a diagram showing an example of lot division. The lot number consists of a predetermined number of digits, the upper predetermined digit part is the original part that does not change before and after lot division or combination, and the lower predetermined digit part is the part that changes before and after lot division or combination. . For example, as shown in FIG. 5, the lot number is “12345678000000”.
, The upper 7 digits “12344567” is the original part, and the lower 7 digits “000000” is the division / combination part.

In the case of the first lot division, the minimum digit of the division / combination section is made up of divisions / combination sections for the number of divisions with alphanumeric characters 1 to 9 and a to z, and there is no change before and after division. The original part is the upper 7 digits. Up to 35 divisions are possible. In the second division, alphanumeric characters are similarly assigned to the second digit of the division / combination section to obtain a new lot number of maximum 35 divisions.

Lot status table 34 and production instruction ID
In the associating unit 35, the division source lot number and kanban I
The association with D is deleted, and the kanban IDs corresponding to the number of lots newly generated by division are read from the performance collection device 12 into the analysis processing unit 21, and these kanban IDs are associated with new lot numbers.

FIG. 6 is a diagram showing an example of combining a plurality of lot numbers. In this case, the number of digits in which the number other than 0 exists in the division combining unit is, for example, the minimum value, the number of the digit above the maximum digit of the number other than 0 is 1 and the lower digits below that. A new division / combination unit is generated by assigning the smallest number among the numbers before the combination. In the illustrated case, the three division / combination units “000001” and “00” are used.
Since the maximum digit of the numbers other than 0 among "0002" and "000012" is "1" of the second digit, the third digit of the division / combination unit after the synthesis is set to 1 and the second digit is the number before the synthesis. The minimum value 1 of the digit is adopted, the minimum value 1 of the first digit before the synthesis is adopted for the first digit, and the division / synthesis unit after the synthesis is "000111". The numeral of a digit having a numeral other than 0 in the division / combination unit may be, for example, the maximum value, or the remaining numeral may be the maximum value of each digit.

Lot status table 34 and production instruction ID
In the associating unit 35, only the correspondence relationship between the combined lot number and kanban ID is given, and the correspondence relationship between the combined lot number and kanban ID is deleted.

In updating lot states other than division and combination,
The correspondence between the lot number and the Kanban ID remains unchanged.

The details of the method of dividing and combining lots and creating a new lot will be described below with reference to the flowcharts of FIGS.

FIG. 7 is a flow chart for explaining the operation of the lot management apparatus shown in FIG.

In FIG. 7, in step 71, the processing code and the data corresponding thereto are read from the performance collection device 12 to the analysis processing section 21. The content of the processing code indicates whether the content of the production instruction is division processing, composition processing, or actual processing. In the case of actual processing, the data corresponding to the processing code includes a Kanban ID (production ID), a location indicating the position where the actual result is adopted, worker information, lot size, lot comment, and incidental information. In the case of division processing, the kanban ID before division and worker information and the like are included. In the case of combination processing, a plurality of kanban IDs before combination and worker information and the like are included.

Next, at step 72, the analysis processing section 21
Using the Kanban ID in the key as a key, the production instruction ID associating unit 35 is searched for the corresponding lot number.

As a result of the search, in step 73, the analysis processing unit 21
It is determined whether or not the kanban ID therein is in the production instruction ID associating unit 35.

When the Kanban ID read from the analysis processing unit 21 does not exist in the production instruction ID associating unit 35, the lot organization processing unit 22 obtains the latest lot number from the lot number ledger storage unit 25 in step 74. The contents of the lot number ledger storage unit 25 are updated by reading out and creating a new lot number by adding 1 to the original portion of the latest lot number and storing it in the lot number ledger storage unit 25. As described above, only the original part of the lot number is stored in the lot number ledger storage part 25, and the division / synthesis part is not stored.

Next, at step 75, the lot organization processing unit 22 reads the process flow corresponding to the product number from the process flow master storage unit 24 using the product number in the Kanban ID as a key.

Next, in step 76, the ID association processing section 23 sets the kanban ID and the process flow read in step 55 as a set, and the lot state table 34.
Write in.

Next, at step 77, the ID association processing section 23 records the performance information in the lot status history storage section 36. The actual result information here is information that the lot was generated and the actual result was improved in the first process, and the date and time when the actual result was recorded, location information indicating the place of the first process, worker information, and lot status became work in progress. It is information such as the information.

Thus, when the lot number corresponding to the Kanban ID does not exist in the production instruction ID associating unit 35, a new lot number is created and stored in the lot number ledger storage unit 25, and the lot state table 34 stores the lot number. The process flow is written together with the Kanban ID, and the record information is recorded in the lot status history storage unit 36.

When it is determined in step 73 that the lot number corresponding to the kanban ID exists in the production instruction ID associating portion 35, the analysis processing portion 21 determines in step 78 that the processing code in the kanban ID is present. , It is determined whether it is actual processing without division or combination, division processing, or combination processing.

FIG. 8 is a flow chart for explaining the performance record processing when it is determined to be performance processing in step 78 of FIG.

In FIG. 8, in step 81, the lot status updating unit 33 (FIG. 3) sends lot number, kanban ID, location, operator name, lot size, lot comment, supplementary information, etc. from the analysis processing unit 21 (FIG. 2). Receive information about.

Next, at step 82, the lot status updating unit 33 analyzes the new lot status indicating whether the lot management target is a finished product, in-process, or an abnormal condition.
It is set by receiving from 1 and the contents of the lot status table 34 are updated by these information. If the lot management target is the final result, the lot status table 34
Erase that information from.

Next, at step 83, the lot status updating section 33 records the results of lot management targets in the lot status history storage section 36 and ends the lot management.

FIG. 9 is a flow chart for explaining lot management in the case where the judgment result of step 78 in FIG. 7 is lot division processing.

In step 91 of FIG. 9, the lot division processing unit 31 (FIG. 3) receives the lot number, kanban ID, and division number information from the analysis processing unit 21 (FIG. 2). The Kanban ID in this case includes both before and after division.

Next, at step 92, the lot division processing section 31 writes the kanban ID and the lot number in the lot state table 34 as associated information. Further, the lot status table 34 and the production instruction ID associating unit 35.
Delete the information before division in.

Next, at step 93, the lot status update unit 33 records the divided results of lot management targets in the lot status history storage unit 36, and ends the lot management. The divided results include the date and time of division, location information indicating in which process, worker information, lot comment information indicating division, lot size after division, and kanban ID.

FIG. 10 is a flow chart for explaining the lot management when the judgment result of step 78 in FIG. 7 is the combining process.

In FIG. 10, in step 101, the lot composition processing unit 32 (FIG. 3) receives the lot number and the kanban ID from the analysis processing unit 21 (FIG. 2). In this case, the Kanban ID includes both before and after combination. The post-combination kanban ID is used to specify which lot is to be combined after the combination.

Next, at step 102, the lot combining processing unit 32 stores the kanban ID in the lot state table 34.
And the lot number are written as associated information. Further, the pre-combination information in the lot status table 34 and the production instruction ID associating unit 35 is deleted.

Next, at step 103, the lot status update unit 33 records the combined results of the lot management targets in the lot status history storage unit 36, and ends the lot management. The combined results include the combined date and time, location information indicating which process exists, worker information, combined lot comment information, combined lot size, and kanban ID.
Is included.

FIG. 11 is a flow chart for explaining a search process for a change in lot status.

In FIG. 11, in step 111, the search condition is input from the lot search device 14 to the lot status search processing section 16. The search conditions include the worker name, location, record date and time, lot number (plural), and development method (product to part or part to product). If at least the location information and the development method are input, other information can be retrieved from the corresponding kanban ID and lot number stored in the lot status table 34.

Next, at step 112, the lot matching the search condition is extracted from the lot status table 34 and the lot status history storage unit 36.

Next, at step 113, the lot state history retrieval unit 41 reads the parts table corresponding to the lot from the parts table storage unit 16 and the process flow master storage unit 24.
The corresponding process flow master is read from.

Next, in step 114, when the expansion method is from product to part, the part number of the part for which the extracted lot is generated is obtained from the parts table 6, and the process flow master storage unit 2
The corresponding process block and the parent lot for each process are extracted from 4.

When the development method is from parts to products, the product number of the product generated by the extracted lot is obtained from the parts table 42,
From the process flow master storage unit 24, child blocks of a corresponding process block and a corresponding process block are extracted.

Then, in step 115, the process flow and the search result are displayed on the display, and the search operation is completed.

The change in the lot status during the manufacture of the product or part depends on how the change in the lot status is to be managed. The lot state changes depending on the Kanban ID and the processing code input to the analysis processing device 3 (FIG. 1), and can also be changed by an operator who monitors the lot state.

FIG. 12 is a diagram showing an example of changes in lot status.

In FIG. 12, as an example of an event (state change event) when the lot state changes, lot organization, work in process, payout, location receipt, next process movement, provisional allocation,
There is input or deletion, and other events include suspension of lot status, release of suspension, process block, process, defect record, and limited express.

Examples of lot states include before work, during work, payout (processing completion in a process), location storage, next process movement, provisional allocation, and disappearance.

For example, the work record, the payout record for each process,
After the processing in the process block is completed, the actual results of location storage (location storage) when storing at the location, next block movement record when carrying to the next process block, input record when it is input as a part A case of recording the status change due to the accounting in the lot status history storage unit 36 and managing the status change will be described below with reference to FIG.

First, when lots are organized into the "before work" state, and when the in-process results are obtained in the process, the lot state is changed to "before work".

When the work is in process, the lot status is set to "work in progress" and "work in progress" is set in the location pointer. The location pointer stores the correspondence between the lot state, the process block and the process in the process block.

When the actual results are obtained when the processing of the parts in the process is completed, the lot state is set to the "delivery" state. At this time, the corresponding "process block, process" is set in the location pointer. This is an operation for specifying one process block among a plurality of process blocks and one process among a plurality of processes in the one process block. That is, the in-process to the payout for the specified process is recorded in the location pointer.

When processing in the process block is finished and the product is stored in the location, the lot status is "location storage" and this is set in the location pointer.

Next, since it is carried to the next process block, the lot state is set to "move next process block" and is set in the location pointer.

Next, when it is planned to be used as a component when it is consumed as a component, the lot state is set to the “provisional allocation” state and set to the location pointer.

Finally, when it is consumed as a part, the lot status is set to "disappear" and the location pointer is set. Although actually deleted from the lot status table 34, a history of disappearance remains in the lot status history storage unit 36. Therefore, when tracing the lot status later, the lot status history storage unit 36 may be referred to. .

The same kanban ID is repeatedly used for generation of different lots, but the lot number and kanban ID are associated with each other at the first device of each lot generation. At this time, the Kanban ID is stored in the lot status history storage unit 36,
The lot number corresponding to this, the contents of the lot status change, the date and time when the lot status change occurred, the location, the worker name, the lot size, the lot comment, and the supplementary information are stored. The device time is also stored.

In addition, if any abnormality occurs in the lot state, the flow in the process is temporarily stopped and an event of "holding" occurs, and when releasing the holding, an event of "holding release" occurs.

The lot size may be
This will be recorded when the actual results are recorded, because it will change when the actual results are recorded.

Since the results are normally recorded in the form of the process flow, the screen of the lot to be processed should be displayed from the result recording screen, and the processing should be performed from the location information and the lot status on the screen. The event is judged and the lot comment, lot size, and worker name are recorded. When you record results, change the lot status, or divide at a place different from the order of the process flow due to irregular treatment, the processing code (lot status change, division, composition, lot organization, lot allocation) A code corresponding to the process of “disappearing or changing the lot size” is read from the performance collection device 12 into the analysis processing unit 21 to change the state,
Divide and combine.

FIG. 13 is a diagram showing an example of a screen displayed when a search condition is input.

When the recorded change in the lot state is searched, the lot search device 14 (FIG. 1) inputs the search condition to the lot state history search section 41. Search conditions 131 are shown in FIG. As shown in the figure, the search conditions include process, production date and time, product name, lot number, worker,
Location, lot status change, comment, Kanban I
There is D, and any one of them is selected and input. However, location is an essential search condition. Otherwise, for example, only the Kanban ID may be input. Also, the direction of search is selected from product to part or part to product.

The lot status history search unit 41 reads out the designated process from the process flow master 6 in response to the input, and specifies the product or the component necessary for constructing the lot corresponding to the designated search condition and the process. Parts list 4
2, the lot status table 34, and the lot status history storage unit 36, and the results are displayed on the screen of FIG. 13 as a process flow and search results. Parts and products not registered in the process flow master are searched from the parts table as shown in FIG.

FIG. 14 is a diagram showing an example of a process flow displayed on the screen shown in FIG. As shown in the figure, the process flow is displayed in a tree shape, and by clicking the process to be searched in the tree, the lot of the process corresponding to the search condition is displayed.

In the process flow, a flow of a set of product numbers and processes (process blocks and processes in them) is displayed. When displaying a product number that is not managed as a process, the parts table of FIG. 4A is displayed. use. When expanding from a product to a part number, the child part number is searched from the process flow table and the parts table based on the parent part number. If there is no step in the process flow, there is no step. Display as a set. The reverse from the part number to the parent number,
The parent part number is searched based on the child part number, and those not in the process flow are displayed without a process, and those in the process flow are displayed as a set of the product number and the process.

FIG. 15 is a diagram showing an example of search results displayed on the screen shown in FIG. As shown, the search results include lot number, lot status change, location,
Date and time, lot size, operator, comment, Kanban ID
Is displayed for each lot. All of this information is automatically retrieved and displayed once you specify the location.

FIG. 16 is a diagram for explaining how to input a result. In the figure, 161 to 165 are production instruction boards, and 166 is a reading device for reading a Kanban ID and a product number written in a two-dimensional code on the production instruction board.
Reference numeral 7 is a lot tracking device installed in the reading device 166, and 168 is a shooter.

The shooter 168 has a surface inclined with respect to the ground surface, and the production instruction plates 161 to 16 are provided on the inclined surface.
The top is open for mounting 5 side-by-side. Below the shooter 168, the lowest production instruction plate 1
Side walls 169 are provided to prevent 61 from falling below it. At the bottom of the shooter 168, the production instruction board 1
A reading device 166 for reading the information on 61 is installed. The reading device 166 is connected to the lot tracking device 167. Lot tracking device 16
7 is connected to the performance collection device 12 shown in FIG.

When the operator removes the production instruction plate 161 from the shooter 168 and attaches it to the corresponding product or part after the kanban ID and the product number on the production instruction plate 161 existing at the lowest position are read by the reading device 166. The production instruction plate 162 existing immediately above the pulled-out production instruction plate 161 rolls down to the lowermost portion due to gravity, and the kanban ID and product number on the production instruction plate 162 are read by the reading device 166. The worker just puts the production instruction board on the top,
The actual results are entered automatically.

Since the production instruction plate is a disc, and the Kanban ID and the product number are written in the center of the disc with a two-dimensional code, even if the production instruction plate rotates, the reading device 166 is used.
Can reliably read the information at a certain position.

FIG. 17 is a diagram showing an example of the lot flow described above. In the illustrated example, there are two types of lot flow, a process block 1 and a process block 2, and there is a process flow for each process block, along which the lot flows.

In process block 1, the process flow branches from process 1 to process 2 and process 3.

In process block 2, the flow is completed by the process 4 alone.

A plurality of instruction kanbans are present in each of the process block 1 and the process block 2, and are collected when the work has finished flowing.

At the process block 1, the contents of the processing code are lot organization (new lot number creation), lot division processing, and lot status update. When one of the production instruction boards (also referred to as an instruction kanban) enters step 1, the processing code on the production instruction board is read and a new lot number is created to perform lot organization. If there is a division instruction in the content of the processing code, it is divided into step 2 and step 3. In steps 2 and 3, the lot division processing unit 32 (FIG. 3) performs division processing to generate a new kanban ID and a lot number, which are recorded on a new production instruction board. Since the production instruction plate used in step 1 is no longer needed in this step, it is returned to the shooter 168 (FIG. 16) for step 1. Step 2 and Step 3
When it is a finished product, the work-in-progress state is a finished product, and when the production instruction plate and the pick-up kanban are collated and the contents match, the product or part is picked up. When the pick-up is completed, the production instruction plate used in step 2 and step 3 is no longer necessary, and is returned to the shooter for each step (kanban collection).

As shown in the lower part of FIG. 17, the in-process state is “in-process” during the steps 1, 2 and 3, and the in-process state is “finished product” at the stage when the finished product is picked up. Becomes In addition, the moving state is the self-process, process 1
Device, process 1 payout, process 2 or 3 device, process 2 or 3 payout is completed. These work-in-progress status and movement status are input to the lot status update section 33 to update the lot status, and are stored in the lot status history storage section 36.

When the two finished products of the process block 1 are moved to the process block 2, a production instruction plate is attached to each of them and the lot combining processing unit 32 (FIG. 3) combines the lots in step 4. At this time, one new production instruction board is created, and the production instruction board before the synthesis is collected as a pick-up kanban. If the product or part after synthesis is a finished product, the lot is erased and the production instruction plate after synthesis is collected by the shooter (kanban collection). The in-process state in the process block 2 is “next process block transportation”, and the movement state is “next process block”.

The lot management device described above is only one embodiment, and the present invention is not limited to this. For example, the lot state shown in FIG. 12 may have various states other than those shown. Also, the search conditions may be other than those shown in FIG.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a lot management device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an outline of a configuration of a lot generation processing unit 13 in FIG.

3 is a block diagram showing an outline of a configuration of a lot tracking processing unit 14 in FIG.

4A is a lot status search processing unit 1 in FIG.
6 is a block diagram showing an outline of the configuration of FIG. 6, (b) is a diagram showing an example of a parts table, and (c) is a diagram showing a tree structure based on the parts table.

FIG. 5 is a diagram showing an example of lot division.

FIG. 6 is a diagram showing an example of combining a plurality of lot numbers.

FIG. 7 is a flowchart illustrating the operation of the lot management apparatus shown in FIG.

FIG. 8 is a flowchart illustrating a performance recording process when it is determined to be performance processing in step 78 of FIG.

9 is a flowchart for explaining lot management when the determination result of step 78 in FIG. 7 is lot division processing.

FIG. 10 is a flowchart illustrating a bit management when the determination result of step 78 in FIG. 7 is a combining process.

FIG. 11 is a flowchart illustrating a search process for a change in lot status.

FIG. 12 is a diagram showing an example of changes in lot status.

FIG. 13 is a diagram showing an example of a screen displayed when a search condition is input.

14 is a diagram showing an example of a process flow displayed on the screen shown in FIG.

FIG. 15 is a diagram showing an example of search results displayed on the screen shown in FIG.

FIG. 16 is a diagram for explaining how to input results.

FIG. 17 is a diagram showing an example of lot flow.

[Explanation of symbols]

11 ... Lot management device 22 ... Lot organization processing section 23 ... ID association processing unit 25 ... Lot number register storage section 36 ... Lot status history storage section 161-165 ... Production instruction board 166 ... Reading device 168 ... Shooter

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hatsuko Kato             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO (72) Inventor Takahiko Shibato             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO (72) Inventor Motohiro Ishibashi             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO F term (reference) 3C100 AA34 AA57 BB02 BB05 BB14                       BB15 DD15 DD22 DD25

Claims (3)

[Claims] 1. In a production management system, a lot number assigned to a lot of a product or a part in the process of production control is unchanged before and after the division or combination of the lot and the original part which is unchanged before and after the division or combination of the lot. A division / combination section that changes and a lot number ledger storage section that stores the original section, and the original section and the division / combination that are stored in the lot number ledger storage section when dividing or combining a plurality of pieces. A lot management device comprising: a unit and a lot organization processing unit that generates a new lot number. 2. In a production management system, an ID association processing unit that associates a lot number given to a lot of a product or a part in a production management process with a unique kanban ID of a production instruction board, and the kanban ID. A lot management apparatus, comprising: a lot status history storage unit that stores a history of attached lot statuses; and a lot status history is searched using the Kanban ID. 3. In a production management system, a plurality of circular production instruction plates in which a product or part number and a kanban ID are recorded by a two-dimensional code in the central portion, and the production instruction plates are adjacent to each other on an inclined surface. And a reading device for reading the kanban ID on the production instruction board existing at the lowermost part of the shooter, and the kanban ID on the production instruction board existing at the lowermost part is read by the reading device. When the production instruction plate existing at the lowest position after being read is taken out from the shooter and attached to the corresponding product or part, the production instruction plate existing immediately above the taken-out production instruction plate is moved to the above-mentioned lowest position by gravity. A lot management device, characterized in that the device is rolled down to a lower part and the kanban ID on it is read by the reading device.