JP2008265433A - Assembly parts registration system - Google Patents

Abstract

An assembly part registration system which performs correct / incorrect judgment on the parent-child relationship of assembled parts, correctness / incorrectness of part types and part installation order, and registers unique information of parts such as a manufacturing number if all parts are judged to be correct. I will provide a.
When the judgment result by the parent-child relationship judgment means 11, the judgment result by the part type judgment means 12 and the judgment result by the mounting order judgment means 13 are all correct, the part information read by the tag information reading means 9 is obtained. There is a component information storage unit 14 for storing in the parent-child component information storage unit 7.
[Selection] Figure 2

Description

  The present invention obtains part information from IC tags attached to each of the assembled parts in a production line in a non-contact manner, determines whether the parent-child relationship between the parts is correct, and then determines whether the part type of the part is correct or incorrect. Next, the present invention relates to an assembling part registration system that judges whether or not the assembling order is correct, and registers all parts information in a database if all are correct.

  For example, when manufacturing a vehicle, many and many types of components are assembled | assembled in a complicated manner. On the other hand, in recent years, customer requests have been diversified, so that there are many types of vehicles, and many options can be selected for the same type of vehicles. Therefore, even for the same type of vehicle, it is necessary to attach and manufacture optional parts according to the specifications (order parts list) of each orderer (customer) at the time of manufacture, so that production management becomes complicated. ing. For this reason, various production management systems have been proposed in order to produce products (vehicles) with high efficiency and good quality. For example, a system is known that issues a warning when a correctness / incorrectness of a parent-child relationship between parts is detected after the parts are attached and is detected to be incorrect (see, for example, Patent Document 1).

JP 2005-35327 A

However, as described above, in recent years, many options are configured in addition to many and many types of parts, and therefore there are the following problems in addition to determining whether the parent-child relationship is correct or not.
(1) When a wrong installation order is detected in a later process, a task of removing and re-installing complicatedly attached parts occurs. The later the detection is delayed, the more the work cost, delivery time, and quality may be affected. There is sex. Therefore, it is necessary to detect a component mounting order error in real time as much as possible.
(2) When a defect is detected in a certain part, it is necessary to replace the defective part for all products.
At that time, there is generally a part that can be installed as long as the type of the part is appropriate, but until the specific information of the part that identifies the defective product is registered, which product the defective product is assembled to. I can't identify. For this reason, it is necessary to manually check the specific information of parts for all products, and there is a possibility that the work cost and the delivery date and the quality will be greatly affected if a work omission occurs. Therefore, it is necessary to register the specific information of the parts in the database immediately after assembling the parts, and to deal with accurate and quick tracing of defective products.

  The present invention has been made in view of such a problem, and it is possible to register the specific information of a component if it is determined whether the parent-child relationship between components is correct, whether the component type is correct, and whether the mounting order is correct. The purpose is to provide a parts registration system.

In order to solve the above-mentioned problem, an assembly part registration system according to the present invention includes:
A parent-child component information storage means for storing at least information indicating the types of a plurality of components constituting the product, information indicating a parent-child relationship of the plurality of components, and information indicating an attachment order of the plurality of components;
A plurality of component information storage means attached to each of the components and storing component information;
In a state where a plurality of the components are assembled, a component information reading unit that reads the information of the component from each of the plurality of component information storage units in a non-contact manner;
Component information temporary storage means for temporarily storing information of the component read by the component information reading means;
Mounting order storage means for storing information indicating the mounting order of the components;
Parent-child relationship determination for determining the correctness of the parent-child relationship of components based on the component information stored in the component information temporary storage means and information indicating the parent-child relationship of the components stored in the parent-child component information storage means Means,
A component type determination unit that determines whether a component type is correct or not based on the component information stored in the component information temporary storage unit and information indicating the type of the component stored in the parent-child component information storage unit; ,
Mounting for determining whether the mounting order is correct based on information indicating the mounting order of the parts stored in the mounting order storage means and information indicating the mounting order of the parts stored in the parent-child component information storage means Order determination means;
When all of the determination result by the parent-child relationship determination unit, the determination result by the component type determination unit, and the determination result by the attachment order determination unit are correct, the component information stored in the component information temporary storage unit is displayed. Component information storage means for storing in the parent-child component information storage means;
It is characterized by having.

  The assembly component registration system according to the present invention may be configured such that when the parent-child relationship determination unit detects that the information does not match, the component type determination unit detects that the information does not match, or the attachment order determination unit The information processing apparatus further includes warning means for issuing a warning when it is detected that the information does not match.

  According to such a configuration, it is possible to easily read the component information of the complexly assembled component, and immediately after assembling the component, confirm the parent-child relationship, the component type, or the correctness of the mounting order and grasp the unique information of the component. Therefore, it is possible to respond accurately and quickly to traces for defective products, and can greatly contribute to QCD (quality, cost, delivery time).

  Moreover, according to this structure, it can utilize also for the assembly of the semi-finished product which comprises not only a finished product but a finished product.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The assembly component confirmation system according to the present invention attaches an RFID (Radio Frequency IDentification ICation) tag (hereinafter referred to as an “IC tag”) to each component, thereby managing the component information for each component individually, Whether the correctness / incorrectness, the correctness / incorrectness of the part type between the parts, and the correctness / incorrectness of the mounting order is determined, and the part specific information is registered.

  First, before explaining the assembly part registration system according to the present invention, a production line for a construction vehicle to which the assembly part registration system is applied will be described with reference to FIG. The production line 60 is assembled to the workpiece (vehicle body) 16 continuously placed on the conveyance line 61 while assembling the parts 20 determined at the predetermined locations. In the case of FIG. 1, the part 20 (in the case of this figure, the cab) is assembled at the assembly place 62 with respect to the vehicle body 16 that has flowed along the transfer line 61. Further, the vehicle body 10 is moved by the transport line 61 and a predetermined inspection is performed at the inspection place 63. As this inspection, for example, confirmation is made as to whether or not a part 20 according to the specification is attached to each vehicle body (work 16) using the assembly part registration system 1 according to the present invention.

  Next, the configuration of the assembly component registration system 1 according to the present invention will be described with reference to FIG. The assembled component confirmation system 1 includes a main body device 2 and an RFID tag reader (hereinafter referred to as “reader 4”), and communicates with an IC tag 3 attached to the component. The main unit 2 is realized by using a general computer, and temporarily stores a CPU 201, a program 2010 executed by the CPU 201, a parent-child component information table 7 in which a parent-child relationship between components is stored, and component information. A storage unit (such as an HDD) 202 that stores the temporary storage table 6 and the mounting order table 8 that stores the mounting order of components; an input unit (such as a keyboard) 203 that inputs information; a display unit 204 that displays information; And an interface unit 205 with the reader 4. As shown in FIG. 2, the program 2010 includes an ID information reading function 9, an ID information temporary storage function 10, a parent-child relationship determination function 11, a component type determination function 12, an attachment order determination function 13, a component information storage function 14, and a warning function. It consists of 15.

  The ID information reading function 9 reads each piece of component information (ID information) from the IC tag 3 of a plurality of components attached to the product using the reader 4, and the read ID information is read by the ID information temporary storage function 10. Store in the temporary storage table 6. The parent-child relationship determination function 11 compares the information stored in the parent-child component information table 7 with the information stored in the temporary storage table 6 to determine the correctness of the parent-child relationship of the attached components. If the parent-child relationship determination function 11 detects an error in the parent-child relationship, the warning function 15 issues a warning to the display unit 204.

  Next, the component type determination function 12 compares the component type information stored in the parent-child component information table 7 with the component type information stored in the temporary storage table 6 to determine whether the attached component type is correct or incorrect. If the part type is correct, 1 is written in the attachment order field of the attachment order table 8. The initial value of the mounting order field is set to 000, and the value becomes 001 if correct in the first component type correctness determination. As a result, each time a part is assembled, the value of the attachment order field increases by one, and correct / incorrect determination with respect to the attachment order information in the parent-child part information table 7 is performed. If the component type determination function 12 detects a mismatch between the component types, the warning function 15 issues a warning to the display unit 204.

  Next, the mounting order determination function 13 compares the mounting order information stored in the parent-child component information table 7 with the mounting order information stored in the mounting order table 8 to determine whether the mounting order of the mounted parts is correct or incorrect. To do. If the mounting order discriminating function 13 detects a mismatch in the mounting order, the warning function 15 issues a warning to the display unit 204. Next, the component-specific information stored in the temporary storage table by the component information storage function 14 is stored in the parent-child component information table 7.

  FIG. 3 is a block diagram showing the structure of the IC tag and the IC tag reader.

  Here, an IC tag (RFID tag) 3 used in the present invention will be described with reference to FIG. The IC tag 3 includes an antenna 51, an IC chip in which a capacitor 52 and other circuits are housed in one, and is configured to communicate with the reader 4 by electromagnetic waves such as radio waves and microwaves. ing. This IC chip is configured by connecting an interface unit 53, a CPU 54, a control unit 55, and a memory unit 56 via an internal bus 57. On the other hand, the reader 4 includes a modulation unit 32 and a demodulation unit 33 connected to the antenna 31, and is connected to the main body device 2 via the interface unit 34.

  For example, when a command for acquiring the ID information 58 stored in the IC tag 3 is transmitted from the main unit 2 to the reader 4, the ID information acquisition command is modulated from the interface unit 34 to the transmission signal by the modulation unit 32, and the antenna. A radio wave is emitted from 31. This radio wave is received by a resonance circuit composed of the antenna 51 and the capacitor 52 of the IC tag 3 and passed to the interface unit 53. In the interface unit 53, the received signal is demodulated into a command by the demodulating unit 53 b, and the control program stored in the control unit 55 is executed by the CPU 54, thereby acquiring the ID information 58 from the memory unit 56. Further, the modulation unit 53 a modulates the ID information 58 and transmits it from the antenna 51. Then, the radio wave from the IC tag 3 is received by the antenna 31 in the reader 4, demodulated by the demodulator 33, and the received ID information 58 is passed to the main device 2 via the interface unit 34. The interface unit 53 of the IC tag 3 has a voltage regulator 53c, and is configured to stabilize the current excited by the radio wave transmitted from the reader 4 and supply it to each unit as a driving DC power source. ing.

  As described above, the IC tag 3 mainly uses radio waves (electromagnetic waves) and can read and write the component information (ID information 58) written in the memory unit 56 of the IC tag 5 without contact. ing. Since the IC tag 3 operates by generating electricity using electromagnetic waves emitted from the reader 4, it does not require a power source such as a battery, and can be configured with a single IC chip, so that it is very small. Can be attached to various parts.

  As described above, the main body device 2 in the assembly component registration system 1 can be realized by a general computer or the like, and includes an ID information reading function 9, an ID information temporary storage function 10, a parent-child relationship determination function 11, and a component type determination function 12. The mounting order determination function 13, the component information storage function 14, and the warning function 15 can be realized as programs operating on this computer. A specific processing procedure will be described later.

  The embodiment in the application of the assembly part registration system 1 as described above to the vehicle manufacturing process will be described in more detail. In addition, the same code | symbol is attached | subjected about the part similar to FIG. 1 demonstrated previously, and description is abbreviate | omitted. First, a system configuration for producing a vehicle will be described with reference to FIG.

  As described above, the workpiece 20 (for example, the vehicle body) continuously placed on the transfer line 61 of the production line 60 is subjected to the component 20 (for example, the predetermined location (for example, the assembly location 62)). A cab) is attached. This production line 60 is controlled by a production management system 70. The production management system 70 manages various information related to vehicle production in the storage unit (HDD or the like) 72. Although not shown, the production management system 70 is realized using a general computer and has a program executed by the CPU. The assembly part registration system 1 and the production management system 70 are connected by a LAN or the like.

  In the storage unit 72, for example, parts information (hereinafter referred to as “vehicle information”) of a vehicle having a structure as shown in FIG. 4 is managed. Control is performed.

  This vehicle information will be briefly described. Data is managed for each manufactured vehicle. The master data C1 composed of the model and the number is used as reference information, and the parts that the vehicle is configured (assembled) are in a tree. It is managed in the form. In the example of FIG. 4, parts (for example, cabs) C10 and C20 corresponding to the major classification are managed with respect to the master data C1, and those parts are configured for the major classification parts C10 and C20. The sub-category parts (for example, windows for the cab) C11 to C22 are managed. Therefore, based on the vehicle information, for example, the parts 20 are delivered to a predetermined place by controlling a parts delivery system (not shown) by the production management system 70, and an assembly work for the workpiece 16 is performed by an operator.

  As described above, it is necessary to inspect whether the product manufactured based on the production management system 70 is attached as instructed by the assembling instruction means, and the inspecting process is performed after the assembling work. And the assembly | attachment components registration system 1 which concerns on this invention is applied to the process of this test | inspection. Here, the workpiece 16 is a vehicle main body, and the component 20 will be described as a component (for example, a cab) corresponding to a large classification. In the example of FIG. 1, the reader 4 constituting the assembly part registration system 1 is disposed at an inspection place 63 in the production line 60. The above-described IC tag 3 is attached to the component 20 for identification of each component. Individual component information (ID information 58 in FIG. 3) is stored in the IC tag 3 in advance. The parent-child component information table 7 has the same structure as the vehicle information managed by the production management system 70 described above. An example of the structure of the parent-child component information table 7 is shown in FIG. That is, for the master information P1 that identifies each product, large-class component information P10 and P20 attached to this product is managed as parent-child component information in a tree shape. The IC tag 3 attached to the component 20 stores data corresponding to the information in the parent-child component information table 7, and stores the same information as the large category component information (for example, P10). Yes.

  As described above, when the assembly of the vehicle is completed, the ID information 58 is read from the IC tag 3 by the reader 4 at the inspection place 63 to check whether the parent-child relationship is correct, whether the component type is correct, and whether the mounting order is correct. . The confirmation procedure will be described with reference to FIGS.

First, the IC tag information 58 is read from the IC tag 3 attached to the component 20 by the ID information reading function 9 (ID information reading process S101). The contents of the IC tag information 58 are shown in FIG.
Next, the contents of the IC tag information 58 read by the ID information reading process S101 are stored in the temporary storage table 6 by the ID information temporary storage function 10 (ID information temporary storage process S102). The contents of the temporary storage table 6 are shown in FIG. Specifically, the contents stored in the temporary storage table 6 are contents of a model field, a part name field, a part type field, a product number field, a lot number field, and a manufacturer field.

  Next, the contents of the model field of the temporary storage table 6 and the contents of the model field of the parent-child component information table 7 are compared by the parent-child relationship determination function 11 (parent-child relationship determination processing S103). Specifically, the model field of the parent-child component information table 7 is searched using the model field of the temporary storage table 6 as a key, and the contents of the model field of the parent-child component information table 7 and the contents of the model field of the temporary storage table 6 are compared. Make a comparison.

  At this time, if the contents of the model field in the temporary storage table 6 and the contents of the model field in the parent-child component information table 7 are different, it is determined that there is an incorrect assembly. If it is determined in this parent-child relationship determination process S103 that there is an incorrect assembly, the warning function 15 executes a warning process S107. The warning process S107 can be configured to display a warning on the display unit 204 included in the assembled component confirmation system 1. In addition to the method of using the display unit 204 as described above, an audio unit such as a buzzer is used. It can also be realized.

  Next, the component type determination function 12 compares the content of the component type field in the temporary storage table 6 with the content of the component type field in the parent-child component information table 7 (component type determination process S104). Specifically, using the contents of the part name field of the temporary storage table 6 as a key, a parts table having a part name that matches the part name in the parent-child part information table 7 (for example, P10 when the part name is a cab). The contents of the part type field of the part table are compared with the contents of the part type field of the temporary storage table 6.

  At this time, if the contents of the part type field of the temporary storage table 6 and the contents of the part type field of the parent-child part information table 7 are different, it is determined that there is an incorrect assembly, and the warning process S107 is executed.

  If the contents match, the value 1 is written in the attachment order field of the attachment order table 8. The contents of the mounting order table are shown in FIG.

  Next, the contents of the attachment order field of the attachment order table 8 and the contents of the attachment order field of the parent-child component information table 7 are compared by the attachment order judgment function 13 (attachment order judgment processing S105). Specifically, using the mounting order field of the mounting order table 8 as a key, the mounting order field in the component table specified by the component type determination function 12 is searched, and the contents are compared.

  At this time, if the contents of the attachment order field of the attachment order table 8 and the contents of the attachment order field of the parent-child component information table 7 are different, it is determined that there is an incorrect assembly, and the warning process S107 is executed.

Finally, the content of the temporary storage table 6 is stored in the parent-child component information table 7 by the component information storage function 14 (component information storage process S106). Specifically, the contents of the manufacturing number field, lot number field, and manufacturer field of the temporary storage table 6 are stored in the manufacturing number field, lot number field, and manufacturer field of the parent-child component information table 7.
In the above description, a case has been described where the assembly part registration system 1 is used to confirm the parent-child relationship of the assembled parts at the inspection place 63. However, as shown in FIG. In addition, it is important that the reader 4 is installed so that the correctness of parts assembly is confirmed at a plurality of steps in the manufacturing process. Thus, by confirming the correctness of component assembly in a plurality of steps, it is possible to find an incorrect assembly at an early stage and reduce rework of the assembly operation.

  As is clear from the above description, according to the assembly part registration system according to the present invention, each part has part information storage means for storing part information of the part, and a plurality of parts are assembled into a product. Comparison between the component information read from the component information storage unit by the information reading unit and the parent-child information between the components stored in the parent-child information storage unit, and the component types between the components stored in the component type storage unit The correctness of the assembly relation of parts can be confirmed by comparing with the information and comparing with the order information between parts stored in the means for storing the order. Can be easily performed. In addition, since the specific information of the part can be registered immediately after the confirmation, the part can be traced accurately and quickly even when the product is in the process of being manufactured.

It is explanatory drawing which shows the manufacturing line of a vehicle. It is a block diagram which shows the structure of the main body apparatus 2 in the assembly | attachment components registration system 1 which concerns on this invention. It is a block diagram which shows the structure of an IC tag and a reader. It is a data structure figure which shows the data structure of vehicle information. It is a data structure figure which shows the data structure of a parent-child component information table. It is a processing flow of the assembly component registration system which concerns on this invention. It is a data structure figure which shows the data structure of IC tag information. It is a data structure figure which shows the data structure of a temporary storage table. It is a data structure figure which shows the data structure of an attachment order table.

Explanation of symbols

2 ... Assembly component registration system main unit, 3 ... IC tag (component information storage means), 4 ... Reader (information reading means)

Claims (2)

A parent-child component information storage means for storing at least information indicating the types of a plurality of components constituting the product, information indicating a parent-child relationship of the plurality of components, and information indicating an attachment order of the plurality of components;
A plurality of component information storage means attached to each of the components and storing component information;
In a state where a plurality of the components are assembled, a component information reading unit that reads the information of the component from each of the plurality of component information storage units in a non-contact manner;
Component information temporary storage means for temporarily storing information of the component read by the component information reading means;
Mounting order storage means for storing information indicating the mounting order of the components;
Parent-child relationship determination for determining the correctness of the parent-child relationship of components based on the component information stored in the component information temporary storage means and information indicating the parent-child relationship of the components stored in the parent-child component information storage means Means,
A component type determination unit that determines whether a component type is correct or not based on the component information stored in the component information temporary storage unit and information indicating the type of the component stored in the parent-child component information storage unit; ,
Mounting for determining whether the mounting order is correct based on information indicating the mounting order of the parts stored in the mounting order storage means and information indicating the mounting order of the parts stored in the parent-child component information storage means Order determination means;
When all of the determination result by the parent-child relationship determination unit, the determination result by the component type determination unit, and the determination result by the attachment order determination unit are correct, the component information stored in the component information temporary storage unit is displayed. Component information storage means for storing in the parent-child component information storage means;
An assembly parts registration system characterized by comprising:   When it is detected that the information does not match by the parent-child relationship determining means, or when it is detected that the information does not match by the part type determining means, or when the information is not matched by the mounting order determining means, The assembly part registration system according to claim 1, further comprising warning means for issuing a warning.

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