JP2008059337A - Working time acquisition system, and assembling indication information display/working time acquisition system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working time acquisition system capable of acquiring easily a working time, when acquiring the working time in product assembling work, using a radio IC tag. <P>SOLUTION: This working time acquisition system is used for acquiring the working time in every assembling work unit in each process, in the product assembling work, and is provided with the radio IC tag 1 recorded with product identification information, a tag receptacle 3 used for setting the radio IC tag in a readable state, a tag reader 4 for reading the information from the radio IC tag, and a working time acquisition means 13 for acquiring the first reading time as a work start time, in repeated reading of the information from the radio IC tag at a fixed time interval by the tag reader, for acquiring the final reading time as a work finish time, and for finding the working time in the every assembling work unit in the each process, based on the work start time and the work finish time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a work time acquisition system for acquiring a work time during product assembly work, and also relates to an assembly instruction information display / work time acquisition system for displaying assembly instruction information in conjunction with the acquisition of the work time.

  For example, in the assembly work of printed circuit board products, products are assembled by assembling various circuit components as embedded components on a printed circuit board that is an embedded component, and there are various types of circuit components. In general, a product is assembled through a plurality of processes or a process of soldering an incorporated circuit component.

  In such product assembly work, for example, assembly instruction information for instructing in detail the contents of the assembly work in each process, such as how to assemble built-in parts, is provided to the worker as an assembly instruction diagram, for example. According to the diagram, the built-in component is incorporated into the component-embedded body. In product assembly work, work time management is performed as part of process management. The work time management is performed by obtaining the work start time and work end time for each process for each product assembly work unit, which is a unit of one or a plurality of the same products, and obtaining the work time from these times. It is common.

  When the assembly instruction information is in the form of an assembly instruction diagram, there are a method using a paper assembly instruction diagram and a method using an assembly instruction diagram converted into electronic data, but recently the transition to the latter method is progressing. . In the case of using the assembly instruction diagram of electronic data, it is common to display the assembly instruction diagram corresponding to the assembly target product for each process by inputting product identification information into the assembly instruction information display system.

  For obtaining work time in product assembly work or the like, a method using a bar code and a method using a wireless IC tag are known. Here, the wireless IC tag is also referred to as an RFID (Radio Frequency Identification) tag, and includes an IC chip for storing information and an antenna, and reads information by a tag reader or a tag reader by proximity wireless communication with a tag reader or a tag reader / writer. It is a tag type element that enables reading and writing of information by a writer.

  In the barcode method, a barcode in which product identification information for identifying a product to be assembled is recorded. The barcode is generally attached to a work instruction sheet. Here, the work instruction form is a form in which information on assembly work for each product to be assembled, specifically, assembly work information such as the model name, the number of manufactured products, the assembly process, and the process order of the work target product is recorded. The vote is made to flow through the work process together with the component built-in body as an accessory to the component built-in body. The acquisition of the work time by the barcode attached to such a work instruction form is performed by using the barcode reader installed for each process at the start and end of the work in the process. The work start time and the work end time are acquired by holding over and reading.

  As for the wireless IC tag method, a “result time collection system using an RFID tag” disclosed in Patent Document 1 is known. In this system, each of the workers to be collected for the actual time carries an RFID tag, and an RFID reader / writer is installed in the vicinity of the work location for which the actual time is to be collected. An RFID tag is placed in the vicinity of the device, and the RFID tag is collected at the end of the work, so that the work results for each work unit are stored in the RFID tag. The non-volatile memory built in the RFID tag stores the identification information of the RFID reader / writer indicating the work location, the time information including the work start time and the work end time for each work unit as well as the storage area of the worker identification information. A plurality of storage areas for storing are provided, and a storage address storage area for storing the storage address of the current time information storage area is further provided.

JP 2005-141530 A

  As described above, in the product assembly work, the assembly instruction information is used, and the work time is also acquired. Therefore, if the burden on the worker can be reduced, the work efficiency in the assembly work can be increased. From this point of view, the barcode method is insufficient. That is, in the barcode method, it is necessary for the worker to hold the barcode over the barcode reader at the start and end of the work in each process, and the burden on the worker is increased accordingly.

  On the other hand, in the wireless IC tag method as disclosed in Patent Document 1, the work time can be acquired simply by placing a wireless IC tag near the tag reader at the start of work and collecting it at the end of work. The burden can be reduced. However, in the wireless IC tag method of Patent Document 1, time information is recorded on the wireless IC tag. For this reason, the functionality of the wireless IC tag cannot be fully utilized, and the work time acquisition process is complicated. In addition, the wireless IC tag method of Patent Document 1 does not fully utilize the functionality of the wireless IC tag with respect to the use of assembly instruction information, and is insufficient in terms of reducing the burden on the worker regarding the use of assembly instruction information. It is.

  The present invention has been made against the background of the above situation, and by making more effective use of the functionality of the wireless IC tag, it is possible to more easily obtain the working time by using the wireless IC tag. The objective is to provide a working time acquisition system that can be used, and more effectively utilize the functionality of the wireless IC tag, thereby reducing the burden on the worker regarding the acquisition of working time and the use of assembly instruction information in product assembly work. It is an object of the present invention to provide an assembly instruction information display / work time acquisition system that makes it possible to obtain the work time and more easily.

  The work time acquisition system according to the present invention is for acquiring a work time for each assembly work unit in each step when assembling a product to be assembled by assembling a built-in component into a built-in component. Product identification information for identifying a product is recorded and used as a wireless IC tag used to attach to the component built-in body, provided for each process, and used to set the wireless IC tag in a readable state A tag receiver that reads information from the wireless IC tag set in the tag receiver, and the tag reader repeats reading information from the wireless IC tag set in the tag receiver at regular time intervals. The reading time is acquired as the work start time, and the last reading time is set as the work end time. Acquired, and a working time acquisition means for determining the operation time of each assembling operation unit in each step of these work start time and work end time.

  In the work time acquisition system as described above, the tag reader acquires the first read time as the work start time while the tag reader repeatedly reads information from the wireless IC tag at regular time intervals, and the last read time as the work end time. Try to get. For this reason, the functionality of the wireless IC tag can be utilized more effectively, and the process for obtaining the working time can be completed with a simpler process.

  Also, the assembly instruction information display / working time acquisition system according to the present invention is an assembly instruction information for instructing the contents of the assembly work in each process at the time of assembling work for a product assembled by incorporating the built-in part into the part assembly. , And for obtaining the working time for each assembly work unit in each step, product identification information for identifying the product is recorded and used so as to be attached to the component assembly. A wireless IC tag, a tag receiver provided for each process and used to set the wireless IC tag in a readable state, a tag reader for reading information from the wireless IC tag set in the tag receiver, the assembly instruction Assembly instruction information storage means for storing information, and the assembly instruction information rating based on the product identification information from the tag reader. Assembly instruction information retrieval means for retrieving corresponding assembly instruction information from the means, a display device provided for each process for displaying the assembly instruction information retrieved by the assembly instruction information retrieval means, and set in the tag holder While the tag reader repeatedly reads information from the wireless IC tag at regular time intervals, the first reading time is acquired as a work start time, and the last reading time is acquired as a work end time. Work time obtaining means for obtaining a work time for each assembly work unit in each step from the end time is provided.

  In the assembly instruction information display / working time acquisition system as described above, a wireless IC tag used so as to be attached to the part assembly is set in the tag holder at the start of work, and the wireless IC tag is moved from the tag receiver to the wireless IC tag at the end of work. It is possible to display the necessary assembly instruction information and obtain the work time only with the trouble of collecting the tag. For this reason, an operator's burden can be reduced about product assembly work, and work efficiency can be improved. In the assembly instruction information display / working time acquisition system as described above, the first reading time is acquired as the work start time while the tag reader repeatedly reads information from the wireless IC tag at regular time intervals, and the last reading is performed. The time is acquired as the work end time. For this reason, the functionality of the wireless IC tag can be utilized more effectively, and the process for obtaining the working time can be completed with a simpler process.

  In product assembly work to which the above work time acquisition system or assembly instruction information display / work time acquisition system is applied, a work instruction sheet on which information on the assembly work for each product to be assembled is recorded is included in the part assembly. In general, it is used as an accessory. Therefore, for the work time acquisition system or the assembly instruction information display / work time acquisition system as described above, the wireless IC tag is preferably attached to the work instruction form. By doing in this way, the burden of the operator about handling of a wireless IC tag can be reduced.

  As described above, when the wireless IC tag is attached to the work instruction form, the wireless IC tag can be set in a readable state set by inserting the attachment work instruction form. Preferably, a tag receptacle is formed. By doing so, the handling of the wireless IC tag can be improved.

  According to the present invention as described above, the functionality of the wireless IC tag can be utilized more effectively, the working time can be obtained more easily by using the wireless IC tag, and the product It is possible to reduce the burden on the worker regarding the acquisition of the work time and the use of the assembly instruction information in the assembly work, and the work time can be acquired more easily.

  Hereinafter, modes for carrying out the present invention will be described. FIG. 1 shows a configuration of an assembly instruction information display / work time acquisition system according to an embodiment. The assembly instruction information display / working time acquisition system includes a work instruction sheet 2, a tag receiver 3, a tag reader 4, a data processing device 5, and a display device 6 to which a wireless IC tag 1 is attached. At the time of product assembly work for a product that is assembled by incorporating a built-in component into a component built-in body, assembly instruction information for each target product is displayed on the display device 6 installed in each process for each process. It functions to obtain the work time of assembly work for each work unit. Specifically, the data reader 5 reads the wireless IC tag 1 after the worker inputs the work instruction form 2 to which the wireless IC tag 1 is attached into the tag receiver 3, so that the data processing device 5 performs each process. The operation time for each assembly operation unit is acquired, and assembly instruction information for each target product is displayed on the display device 6 for each process. Here, the assembly instruction information in the present embodiment is given as an assembly instruction diagram. As shown above, the assembly instruction diagram is a diagram for instructing in detail how to assemble the built-in components, etc. In the case of the assembly work of the printed circuit board product described later, for example, the IC chip A is printed on the printed circuit board. Assembly that indicates the contents of assembly work such as how to assemble built-in components, such as at position a above, resistor element B at position b on the printed circuit board, capacitor element C at position c on the printed circuit board, and so on. This is a diagram describing the instruction information in detail.

  The work instruction sheet 2 records the model name, the number of manufactured products, the assembly process, the process order, etc. of the product to be processed as information on the assembly work for each product to be assembled. It is a vote that is made to flow through the work process with the embedded body.

  The wireless IC tag 1 stores product identification information for identifying a product. FIG. 2 shows an example of the format of the wireless IC tag 1. In this example, a product management number, a production number, and a model are recorded as product identification information, and a division number indicating a division lot in the production lot of the target product and the number of units manufactured in the division lot are recorded.

  The tag receptacle 3 is used to set the work instruction sheet 2 in a state where the wireless IC tag 1 attached to the work instruction sheet 2 can be read by the tag reader 4. 7 is provided, and the work instruction form 2 is set to a state in which the wireless IC tag 1 can be read by the tag reader 4 by inserting the work instruction form 2 from the insertion port 7. It is formed as. The tag receiver 3 is provided in each of a plurality of processes, and a work instruction sheet 2 attached to the target component built-in body is inserted at the start of work on the target component built-in body in each step. Then, when the work for the assembly target unit or the assembly unit of the target part assembly is completed, the work instruction sheet 2 attached to the target part assembly is extracted from the tag receiver 3.

  The tag reader 4 is a device that reads information from the wireless IC tag 1 by proximity wireless communication with the wireless IC tag 1, and is provided in pairs with the tag receiver 3.

  The data processing device 5 is for performing data processing related to the display of the assembly instruction information on the display device 6 and the acquisition of the work time. The assembly instruction information storage means 11, the assembly instruction information search means 12, and the work time acquisition means 13. And working time storage means 14.

  The assembly instruction information storage means 11 stores the above assembly instruction diagram which is assembly instruction information. The assembly instruction diagram is usually created for each product and for each process.

  The assembly instruction information retrieval unit 12 retrieves a corresponding assembly instruction diagram from the assembly instruction information storage unit 11 based on the product identification information read from the wireless IC tag 1 by the tag reader 4 and causes the display device 6 to display it.

  The work time acquisition means 13 acquires the work time in each process through the tag reader 4 reading information from the wireless IC tag 1 of the work instruction sheet 2 inserted and set in the tag receiver 3. More specifically, the tag reader 4 repeatedly reads information from the wireless IC tag 1 of the work instruction sheet 2 inserted in the tag receiver 3 at a fixed time interval such as several seconds to several tens of seconds. The information reading result is always given to the work time acquisition means 13. Then, the work time acquisition means 13 acquires the first reading time as the work start time while the tag reader 4 repeats reading the information as described above from the wireless IC tag 1 of the work instruction sheet 2 put in the tag receiver 3. At the same time, the last reading time is acquired as the work end time, and the work time for the assembly work unit in one process is obtained from these work start time and work end time.

  The work time storage unit 14 functions to store the work time data acquired by the work time acquisition unit 13.

  The flow of processing in the assembly instruction information display / working time acquisition system as described above is as shown in FIG. In order to start work for one assembly work unit in one process, the work instruction sheet 2 attached to the part assembly in the assembly work unit is inserted and set in the tag receiver 3 in the process (wireless IC tag). Set processing: Step 101). Upon receipt of the work instruction form 2, the tag reader 4 starts reading information on the wireless IC tag 1 attached to the work instruction form 2, and first information reading is performed (first information reading process for the wireless IC tag: Step 102). In response to this, the time when the work time acquisition means 13 reads the first information is acquired as the work start time (work start time acquisition process: step 103). In parallel with this, the tag reader 4 searches the assembly instruction information storage means 11 based on the product identification information read from the wireless IC tag 1 and displays it on the display device 6 (display of assembly instruction information). Processing: Step 104). When the assembly instruction diagram is displayed on the display device 6, the worker advances the component assembling work in the relevant process for the assembly operation unit while referring to the assembly instruction diagram. In response to this, the tag reader 4 repeatedly reads information, and from this, the work time acquisition means 13 determines the presence / absence of the wireless IC tag 1 in the tag receiver 3 (wireless IC tag presence / absence determination processing: step 105). . Then, when the component assembling work for the assembly work unit in the process is completed, the worker collects the work instruction sheet 2 attached to the part assembly in the assembly work unit from the tag receiver 3. As a result, the result of step 105 becomes negative, so that the work time acquisition unit 13 acquires the last read time in the repeated reading of the information as the work end time (work end time acquisition process: step 106). The work time acquisition means 13 that has acquired the work end time obtains the work time for the assembly work unit in the process from the work start time and the work end time, and stores it in the work time storage means 14 (acquisition of work time). Processing: Step 107).

  Hereinafter, an example in which the above assembly instruction information display / working time acquisition system is applied to the assembly work of a printed circuit board product will be described. In the assembly work of printed circuit board products, the printed circuit board is used as a component assembly, and the product is assembled by incorporating various circuit components such as IC chips, resistor elements, and capacitor elements into the printed circuit board. A step of attaching the circuit component to the printed circuit board and a step of soldering the attached circuit component. FIG. 4 is a diagram schematically showing the working environment of the circuit component mounting process in the assembly work of the printed circuit board product. A mounting work table set 21 is provided in the circuit component mounting process. The mounting workbench set 21 includes a parts shelf 23 formed so that a plurality of parts boxes 22 storing circuit parts can be placed side by side, a workbench 25 on which a work base 24 is installed, and the display device 6 in FIG. 1 and a work instruction form insertion box 27 corresponding to the tag receiver 3 of FIG. The work instruction form insertion box 27 is provided with elements corresponding to the tag reader 4 in FIG. 1, but the illustration thereof is omitted.

  In such a circuit component mounting step, the printed circuit board 29 is supplied in a state where a plurality of racks 28 are held. In this case, a plurality of printed circuit boards 29 held in the rack 28 become an assembly work unit in the circuit component mounting process. That is, the rack 28 is an assembly work unit. Therefore, a work instruction form 30 corresponding to the work instruction form 2 in FIG. 1 is attached to the rack 28, and the wireless IC tag 31 is attached to the work instruction form 30. When there is another circuit component attachment process upstream of the circuit component attachment process, the printed circuit board 29 has been partially assembled in the upstream process.

  When starting work on the rack 28, the worker first places the rack 28 on the work table 25 and puts the work instruction sheet 30 attached to the rack 28 into the work instruction sheet input box 27. Then, the work start time for the rack 28 is acquired as described above, and the corresponding assembly instruction diagram is displayed on the display device 26. In the assembly instruction diagram in the circuit component mounting process, for example, the IC chip A is at a position a on the printed circuit board 29, the resistance element B is at a position b on the printed circuit board 29, and the capacitor element C is at a position c on the printed circuit board 29. ... Is a detailed instruction for assembling circuit components. When the assembly instruction diagram is displayed on the display device 26, the circuit component is attached to the printed circuit board 29. In that work, one of the printed circuit boards 29 is taken out from the rack 28 and placed on the work base 24, and then the circuit component is attached to the printed circuit board 29 in accordance with the assembly instruction diagram displayed on the display device 26. A series of operations for returning the printed circuit board 29 to the rack 28 are repeated for all the printed circuit boards 29 in the rack 28. Thus, when the work in the circuit component mounting process for the rack 28 is completed, the worker collects the work instruction sheet 30 from the work instruction sheet insertion box 27. Then, the work end time for the rack 28 is acquired as described above, and the work time for the rack 28 in the circuit component mounting process is obtained and registered from this work end time and the work start time acquired above. .

  FIG. 5 is a diagram schematically showing the working environment of the soldering process following the circuit component mounting process of FIG. An automatic soldering apparatus 41 is provided in the soldering process. The automatic soldering apparatus 41 includes a work table portion 42 for placing the rack 28, a jig placement portion 44 for placing the soldering jig 43, and a transport carrier operation for performing the work of assembling the printed circuit board 29 to the transport carrier 45. 1, an apparatus main body 47 that automatically solders the printed circuit board 29 that is assembled and transported to the transport carrier 45, a display device 48 that corresponds to the display device 6 of FIG. 1, and a tag receiver of FIG. 1. 3 is provided with a work instruction form insertion box 49 corresponding to 3.

  In such a soldering process, the rack 28 that has undergone the circuit component mounting process of FIG. 4 is supplied. When starting work on the supplied rack 28, the worker first places the rack 28 on the work table portion 42 and puts the work instruction sheet 30 attached to the rack 28 into the work instruction sheet input box 49. Then, the work start time for the rack 28 is acquired as described above, and the corresponding assembly instruction diagram is displayed on the display device 48. The assembly instruction diagram in the soldering process is a diagram for instructing in detail the contents of preliminary work prior to automatic soldering in the apparatus main body 47. For example, how to attach the soldering jig 43 to the printed circuit board 29, The method of assembling the printed circuit board 29 to the transport carrier 45 is instructed in detail. When this assembly instruction diagram is displayed on the display device 48, preliminary work is performed for each printed circuit board 29 while referring to it, and the printed circuit boards 29 that have been completed are sequentially fed into the apparatus main body 47. Here, as a preliminary work, an assembling work of the printed circuit board 29 to the transport carrier 45 and an attaching work of the soldering jig 43 to the printed circuit board 29 are performed.

  The printed circuit board 29 sent into the apparatus main body 47 is discharged from the apparatus main body 47 after finishing the processing there. In response to this, the operator performs an operation of removing the printed circuit board 29 from the transport carrier 45 and returning it to the original rack 28. When the work in the soldering process for the rack 28 is completed in this way, the operator pulls out the work instruction form 30 from the work instruction form insertion box 49. Then, the work end time for the rack 28 is acquired as described above, and the work time for the rack 28 in the soldering process is obtained and registered from the work end time and the work start time acquired above.

  Here, the apparatus main body 47 has an ability to process the printed circuit board 29 for a plurality of racks simultaneously. Therefore, in the soldering process, soldering operations are simultaneously performed on the plurality of racks 28. That is, in the state where the soldering operation as described above is progressing for one rack 28a, the soldering operation is similarly performed for the next rack 28b. In this case, the work instruction form 30a attached to the rack 28a and the work instruction form 30b attached to the rack 28b are both put into the work instruction form input box 27. Therefore, the information is read by the tag reader for each of the work instruction form 30a and the work instruction form 30b, and the work time is acquired and registered for each of the rack 28b and the rack 28b.

  As mentioned above, although one of the forms for implementing this invention was demonstrated, this is only a representative example and this invention can be implemented with various forms in the range which does not deviate from the meaning. it can. For example, the above embodiments are for the assembly instruction information display / work time acquisition system. However, the present invention can also be implemented in the form of a work time acquisition system that omits the display function of the assembly instruction information. .

It is a figure which shows the structure of the assembly instruction information display and work time acquisition system by one Embodiment. It is a figure which shows the example of a format of a radio | wireless IC tag. It is a figure which shows the flow of a process in an assembly instruction information display / work time acquisition system. It is a figure which shows typically the work environment of the attachment process of the circuit components in the assembly work of a printed circuit board product. It is a figure which shows typically the work environment of the soldering process in the assembly work of a printed circuit board product.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 31 Wireless IC tag 2, 30 Work instruction form 3 Tag receiver 4 Tag reader 6, 26, 48 Display device 11 Assembly instruction information storage means 12 Assembly instruction information search means 13 Work time acquisition means 27, 49 Work instruction form input box ( Tag receiving)
29 Printed circuit board (component assembly)

Claims (4)

A work time acquisition system for acquiring a work time for each assembly work unit in each process at the time of assembling work for a product assembled by incorporating a built-in part into a built-in component,
Product identification information for identifying the product is recorded, and a wireless IC tag used to be attached to the component assembly is provided for each process, and the wireless IC tag is set in a readable state. The tag receiver used, the tag reader that reads information from the wireless IC tag set in the tag receiver, and the tag reader repeatedly reads information from the wireless IC tag set in the tag receiver at regular time intervals. Working time obtaining means for obtaining the working time for each assembly work unit in each process from the working starting time and the working finishing time. Work time acquisition system comprising. When assembling a product that is assembled by incorporating a built-in component into a built-in component, assembly instruction information that indicates the contents of the assembly work in each process is displayed, and work for each assembly work unit in each process An assembly instruction information display / working time acquisition system for acquiring time,
Product identification information for identifying the product is recorded, and a wireless IC tag used to be attached to the component assembly is provided for each process, and the wireless IC tag is set in a readable state. Tag receiver used, tag reader for reading information from the wireless IC tag set in the tag receiver, assembly instruction information storage means for storing the assembly instruction information, and the assembly instruction information based on the product identification information from the tag reader Assembly instruction information retrieval means for retrieving corresponding assembly instruction information from the storage means, a display device provided for each process for displaying the assembly instruction information retrieved by the assembly instruction information retrieval means, and set in the tag holder The first reading time when the tag reader repeatedly reads information from the wireless IC tag at regular time intervals. Work time acquisition means for obtaining the work start time, obtaining the last read time as the work end time, and obtaining the work time for each assembly work unit in each step from the work start time and the work end time. Assembly instruction information display / working time acquisition system.   2. The wireless IC tag is recorded with information on assembly work for each product to be assembled, and is attached to a work instruction sheet used so as to be attached to the component assembly. The work time acquisition system according to claim 2, or the assembly instruction information display / work time acquisition system according to claim 2. 3. The tag receiver is configured as an input box in which the wireless IC tag is set in a readable state by inputting the work instruction sheet to which the wireless IC tag is attached. Work time acquisition system or assembly instruction information display / work time acquisition system.

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