JP2006323655A - Erroneous/missing component inspection device and erroneous/missing component inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an erroneous/missing component inspection device and an erroneous/missing component inspection method, allowing an unskilled worker to easily perform inspection of installation omission and an installation error in installing components. <P>SOLUTION: This erroneous/missing component inspection device is a device for inspecting an erroneous/missing component of a work 4 installed with components 6, etc., and each the component 6, etc. is installed with a tag 7 recording at least kind information Id6 thereof. The erroneous/missing component inspection device has: a reading part 10 reading the kind information Id6 from the tag 7 installed to the component 6 installed to the work 4; a recording part 8a recording component list data T showing the kind of the component 6 installed to each of various kinds of works 4 and the kind of the work 4; and a processing part 8c performing processing for inspecting whether the component 6 is correctly installed to the work 4 or not by use of the read kind information Id6 and the component list data T. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an error missing item inspection apparatus and an error missing item inspection method.

  2. Description of the Related Art Conventionally, in a production line such as an automobile factory, there is a case where a variety of workpieces are transported on the same production line and different types of parts are assembled to each workpiece.

  FIG. 6 is a diagram showing a configuration of a production line 90 for assembling parts to a work such as an engine. In FIG. 6, 91 is a conveyor, and 92 is a work (engine) that is sequentially conveyed by this conveyor 91 in the direction indicated by arrow A at a predetermined speed. Reference numeral 93 denotes a tag in which work contents to be applied to the engine 92 including type information of each engine 92 is recorded. In this example, the tag 93 is a production instruction card that is attached to the engine 92 and conveyed.

  94 is a plurality of work stations provided along the conveying direction of the conveyor 91, 95 is a production instruction device installed in each work station 94, 96 is a reading device for reading the type information recorded on the production instruction card 93, 97 is an output device that is formed on a parts shelf or the like and gives instructions to the worker, 98 is an information processing device such as a computer that is communicably connected to each production instruction device 95, and 99 is arranged in the final process of the production line 90. This is an erroneous item inspection station.

  In the information processing apparatus 98, type information of all engines 92 produced by the production line 90 and type information of each part to be assembled to the various engines 92 are recorded as parts list data T. The information processing device 98 is connected so as to be communicable with each production instruction device 95, and according to the work contents in each work station 94, the type information of the engine 92 and the parts to be assembled to the engine 92 are displayed. Data tables Ta, Tb... Showing the relationship with the type information are transferred to the production instruction device 95.

  FIG. 7 is a diagram showing an example of a more specific configuration of the production instruction device 95, and shows that the output device 97 includes a plurality of lamps 97A to 97D. The production instruction device 95 having the above configuration reads the type information of the engine 92 by using the reading device 96 and collates it with the data table Ta (Tb, Tc...) Before the worker performs the assembly work. The instruction device 95 determines the type of component to be assembled according to the type information of the engine 92, and lights or blinks an appropriate one of the lamps 97A to 97D. Therefore, the worker can correctly attach the parts to the engine 92 by assembling the designated parts in accordance with the instruction of the output device 97.

  In particular, when the workpiece is the engine 92 as described above, even if the engine 92 is of the same type, for example, the difference in grade including the displacement and the structure of the transmission, the difference in the octane number of the fuel used, Since the parts to be assembled may differ depending on the country where the manufactured engine 92 is used, it is important to indicate the parts to be assembled by the output device 97. Table 1 shows, as an example, the types of components that are assembled in correspondence with the types of the engine 92.

As described above, in particular, in the production line 90 of the engine 92, even the same type of engine 92 is divided into many types, and it is necessary to change some types of parts. In the final process at the station 99, the inspection worker inspects the parts assembled in the finished product of the engine 92, and checks whether there are any assembly errors or omissions (hereinafter referred to as assembly check). It is important to do.
Japanese Patent No. 3334875

  However, since the inspection worker who can perform the assembly check described above not only knows all types of engines 92 but also needs to know the types of correct parts to be assembled to each engine 92, It required skill. Further, even a skilled inspection worker sometimes overlooks a wrong assembly of particularly similar parts. In addition, some parts to be assembled can be assembled at positions that are difficult to visually confirm, which deteriorates the work efficiency of the inspection operator.

  Furthermore, when the types of engines 92 to be produced are added, each inspection worker needs to memorize the types of parts to be assembled to all types of engines 92 that are newly produced. It was requested.

  The present invention has been made in consideration of the above-mentioned matters, and the purpose of the present invention is to make it easy for anyone who is not a skilled worker to easily check assembly errors and assembly leakage. An object of the present invention is to provide an error missing item inspection apparatus and an error missing item inspection method that can be performed.

  In order to achieve the above-mentioned object, the error missing item inspection apparatus according to claim 1 is an apparatus for inspecting an error missing item of a workpiece to which a part is assembled, and at least its type information is recorded in each component. A tag that has a tag attached and a part that reads the type information from the tag attached to the part attached to the workpiece, and a record that records the parts list data that indicates the type of workpiece and the type of part that is attached to each workpiece And a processing unit that performs a process of inspecting whether or not a component is correctly attached to the workpiece using the read type information and the component list data. The recording of the classification information on the tag is not limited to recording the classification information by a magnetic signal or an electric signal, but may be a combination of a barcode symbol, a two-dimensional symbol, a character formed by printing, or the like.

  The tag may be a wireless recognition non-contact IC tag including a memory in which the type information is recorded, and the reading unit may include a communication unit that performs non-contact communication with the non-contact IC tag. Item 2). A wireless recognition non-contact IC tag provided with a memory is formed in a tag shape and attached to a component. However, the contactless IC tag may be formed so as to be embedded in the component.

  The apparatus for inspecting an erroneous part according to claim 3 is an apparatus for inspecting an erroneous part of a workpiece to which a part is assembled, and each part is provided with at least a symbol display portion indicating its type information, A reading unit for reading the type information from the symbol of the display unit of the component assembled to the workpiece, a recording unit in which component list data indicating the type of workpiece and the type of component assembled to various workpieces is recorded, and the reading And a processing unit that performs a process of inspecting whether or not a component is correctly attached to the workpiece using the type information and the component list data.

  The symbol display part may be a bar code symbol (JAN code) representing information by the width or interval of a line, a two-dimensional symbol (QR code) representing information by a quadrangular two-dimensional distribution pattern, a character, or the like, In the following description, these are collectively referred to as a code display section. The code display portion may be formed by printing, but may be formed by engraving.

  You may provide the display apparatus which displays the determination result of each components assembled | attached to the said workpiece | work (Claim 4). This display device is preferably a monitor that displays on a screen a list showing the parts to be assembled and the determination results.

  A sound generation unit for notifying abnormality by sound when a part is not correctly attached to the workpiece may be provided. This sounding part is preferably a buzzer.

  A stop signal output function for outputting a conveyance stop signal to the control unit of the workpiece conveyance line may be provided when a component is not correctly attached to the workpiece.

  A transport line switching mechanism may be provided for switching the work to be transported to a reworking transport line different from a normal transport line when the parts are not correctly attached to the work.

  The method for inspecting an erroneous product according to claim 8 attaches a tag or a display unit in which at least workpiece type information is recorded to the workpiece, and records at least each component type information in each component assembled to the workpiece. The attached tag or display part is attached, the parts list data indicating the type of work and the type of parts to be assembled to various works is recorded, and the tag or display attached to the work and parts assembled to this work It is characterized by checking whether or not a part is correctly attached to the workpiece by reading the type information of the workpiece and the component from the section and collating with the component list data. The parts list data is preferably recorded in a storage unit of an information processing apparatus, and a series of processes such as reading of workpiece and part type information and collation of the read type information with parts list data are performed. It is desirable to use an information processing device.

  Since the parts list data indicating the types of parts to be assembled for each type of workpiece is registered in the erroneous part inspection device by using the erroneous part inspection device according to claim 1, the conveyance line By reading the type information of the workpiece assembled above and inputting it to the erroneous missing item inspection apparatus, it is possible to obtain the type information of the component that is normally assembled to the workpiece. Then, by checking the type information of each part read by the reading unit using the parts list data, it is possible to check whether the parts should be properly assembled to this work by checking the assembly. This can be determined by collating with the parts list data of the workpiece.

  Therefore, even if the worker does not store the correct component type information to be assembled to each workpiece, the worker can easily and reliably check the assembly of the components assembled using the component type information read by the reading unit. be able to. Even when a new type is added to the workpiece, it is possible to deal with it without burdening the operator by simply rewriting the parts list data corresponding to the workpiece. In addition, when the tag is attached to a part, the tag can be mass-produced separately from the part, and the manufacturing cost can be reduced. When the tag is embedded in the part, it is possible to prevent the tag from being detached from the part.

  The tag is a wireless recognition non-contact IC tag including a memory in which the type information is recorded, and the reading unit includes a communication unit that performs non-contact communication with the non-contact IC tag. In item 2), since the non-contact IC tag performs near field communication of data in the memory in a non-contact manner by an induction electromagnetic field or radio wave, even if the operator does not bring the reading unit close to the workpiece, The distance information can be read to read the type information in the memory. The wireless recognition non-contact IC tag provided with the memory is generally called RFID (Radio Frequency Identification), and is referred to as an RF tag in the following description.

  In addition, since the reading unit that performs data communication using the RF tag can quickly read the type information recorded on a large number of RF tags, the read type information is used as a list data table of the erroneous product inspection device. Quick verification is possible. That is, the assembly check can be quickly performed using the read type information.

  In particular, when the workpiece is an engine, not only the number of parts to be assembled is large, but each part may be assembled at a position where it is difficult to visually confirm. Since each type information can be read from the RF tags of a plurality of parts, the work efficiency is dramatically improved.

  In addition, since the RF tag can be easily downsized, it is particularly suitable for being attached to a small part, and is good because it can be read even if dirt is attached.

  By using the erroneous missing item inspection device according to claim 3, the type information of the workpiece assembled on the transfer line is read and input to the erroneous missing item inspection device, and the part to be properly assembled to the workpiece Type information can be obtained. Then, the type information of each component read by the reading unit can be collated using the component list data, and an assembly check can be performed. In other words, even if the worker does not store the type information of the correct part to be assembled to each workpiece, the worker can easily and reliably check the assembly of the parts assembled using the type information of each part read by the reading unit. be able to. Even when a new type of workpiece is added, it can be easily handled. By forming the symbol display portion by printing it on a label or the like, the cost for forming the display portion can be reduced. However, the display unit may be formed on a component that cannot be attached with a label by forming the display unit on the component.

  The tag shown in the erroneous defect inspection device according to claim 1 is provided with at least a symbol display portion indicating the type information of the component, and the reading portion has a function of reading the type information from the symbol of the display portion. In the case of providing, when the reading unit cannot read the type information from the tag, the type information can be read from the display unit, and the reliability is improved.

  In the case where a display device for displaying the determination result of each component assembled to the workpiece is provided (Claim 4), the inspection operator can visually confirm the determination result of the component. Can be confirmed immediately and mistakes can be reduced. If the display device is a monitor that displays a list of parts to be assembled and their judgment results on the screen, you can clearly know which parts are wrongly assembled or missing, so the inspection results The assembly can be easily reworked using.

  When a sound generation unit for notifying abnormality by sound is provided when the part is not correctly attached to the workpiece (Claim 5), the inspection operator can know the result of the determination of the part by hearing. Because the inspection result can be confirmed intuitively, errors can be reduced accordingly. If the sound generation unit is a buzzer, the configuration becomes simple, so that not only the manufacturing cost can be suppressed, but also the buzzer sound for notifying abnormality can be easily confirmed.

  When a stop signal output function is provided for outputting a conveyance stop signal to the control unit of the workpiece conveyance line when the parts are not correctly attached to the workpiece (Claim 6), the inspection operator It is possible to secure time for performing an appropriate process on the workpiece.

  In the case where a transport line switching mechanism is provided for switching the work to a reworking transport line different from a normal transport line when the parts are not correctly attached to the work (Claim 7), The work efficiency of reworking is improved.

  According to the method of inspecting an erroneous product according to claim 8, since the parts list data indicating the type of workpiece and the type of component to be assembled to various workpieces is recorded, the type information of the read workpiece and component is stored in the component. By checking with the list data, the assembly check can be performed easily and accurately. In particular, the parts list data is recorded in a storage unit or the like of an information processing apparatus, and a series of processes such as reading of workpiece and part type information and collation of the read type information and parts list data are performed. By using the information processing apparatus, the assembly check can be accurately performed by information processing such as a high-speed comparison operation that the information processing apparatus is good at.

  Therefore, even if the worker does not store the correct component type information to be assembled to each workpiece, the worker can easily and reliably check the assembly of the components assembled using the component type information read by the reading unit. be able to. Even when a new type is added to the workpiece, it is possible to deal with it without burdening the operator by simply rewriting the parts list data corresponding to the workpiece.

  FIGS. 1 to 4 are views showing the configuration of an error missing item inspection apparatus 1 according to the first embodiment of the present invention. FIG. 1 shows an error missing item inspection apparatus 1 arranged in a part of a workpiece transfer line 2 and FIG. The figure which shows the outline | summary of the error missing item inspection method using this error missing item inspection apparatus 1, FIG. 2 is a block diagram which shows the structure of the conveyance system containing the error missing item inspection apparatus 1, FIG. 3 is a modification of RF tag FIG. 4 and FIG. 4 are diagrams for explaining the configuration of each conveyance line in the erroneous missing item inspection apparatus 1.

  1 to 4, 3 is a conveyor, 4 is a workpiece (in this example, an engine, hereinafter referred to as an engine 4) and 5 is a part of the engine 4 that is assembled while being sequentially conveyed in the direction of arrow A by the conveyor 3. The RF tag is configured to be able to record production management information including the type information Id4 of the engine 4 by being attached to, 6 is a part attached to the engine 4, and 7 is an RF tag attached to each part 6.

  Reference numeral 8 denotes a central processing of the erroneous product inspection apparatus 1, which is an information processing apparatus such as a personal computer in this example. A display device 9 (hereinafter referred to as a monitor) is connected to the information processing apparatus 8. Has been. A reading unit 10 includes a communication unit that performs non-contact communication with the RF tag 5 attached to the engine 4 and the RF tag 7 attached to each component 6 to read at least the type information Id4 of the engine 4 and each component 6. It is.

  As shown in FIG. 2, the erroneous product inspection device 1 is connected to a host information processing device 11 so as to be communicable. In addition, a plurality of work stations 12 are provided on the conveyer 3 upstream of the error missing item inspection apparatus 1 along, for example, the conveying direction, and 13 is a production instruction device installed at each work station 12. Is a reading unit for reading the type information Id4 recorded on the tag 5, and 15 is an output device which is formed on a parts shelf or the like and gives instructions to the operator. In addition, the said error | missing missing item inspection apparatus 1 is arrange | positioned in the last process of the conveyance line 2 regarding assembly | attachment, and comprises an error missing item inspection station.

  Even if the engine 4 is of the same type, the difference in grades including the displacement and transmission, differences in various specifications adjusted by the laws of the country in which the engine 4 is used, and the fuel used There are many types based on the difference (high-octane / regular).

  Therefore, the RF tag 5 is a semiconductor in which production management information including at least the type information Id4 of the engine 4 (usually including not only the type information Id4 but also quality information indicating the result of testing the performance of each part) is recorded. A memory 5a is built in. The RF tag 5 does not require a power source such as a battery and can be manufactured at low cost, and can read and write data in the plurality of semiconductor memories 5a at a time without contact.

  The RF tag 5 can be attached to the engine 4 by being attached to an appropriate position of the engine 4, and the attached RF tag 5 should surely record information about the engine 4. Can do. However, the RF tag 5 may be attached to the engine 4 by attaching the RF tag 5 to a pallet on which the engine 4 is mounted. In this case, the RF tag 5 may be formed in a removable tag shape like a production instruction card. On the contrary, the function of the RF tag 5 may be built in or embedded in an appropriate place of the engine 4.

  Each component 6 is attached with an RF tag 7 before being assembled to the engine 4, and the configuration of the RF tag 7 is substantially the same as the configuration of the RF tag 5. That is, the RF tag 7 includes at least a semiconductor memory 7a in which the type information Id6 of the component 6 is recorded, and the type information Id6 can be read by non-contact communication. In the example shown in FIG. 1, RF tags 7A, 7B, and 7C in which type information Id6a, Id6b, and Id6c corresponding to each type 6A, 6B, and 6C of the component 6 are recorded are formed.

  As shown in detail in FIG. 2, the information processing device 8 includes, in the information processing device 8, type information Id4 of all the engines 4 that are assembled while being conveyed using the conveyance line 2 and type information of the parts that are to be assembled to the various engines 4. There is provided a recording unit 8a that records the parts list data T indicating the relationship with Id4 (in this example, the parts list data T shown in FIG. 5 is the same and the contents are the same as those in Table 1 above). It has been. Reference numeral 8b denotes a sound generation unit for notifying abnormality by sound when the component 6 is not correctly attached to the engine 4, 8c is a central processing unit, and 8d is a communication unit with the host information processing apparatus 11.

  The recording unit 8a may be a hard disk or a memory of the information processing device 8, but other storage devices may be used. In addition, the sound generation unit 8b is preferably a buzzer so as to reduce the manufacturing cost and generate a suitable warning sound. The communication unit 8d may be a LAN board, for example, but may be another communication device. Needless to say, a program for operating the central processing unit 8c is also necessary. The information processing apparatus 8 can be easily formed by using a personal computer, but it goes without saying that it may be formed by using a one-board computer or a one-chip computer.

  The parts list data T is determined according to the type of engine to be manufactured using the transport line 2, and in this example, the parts list data T input to the upper information processing apparatus 11 is used as the information processing apparatus. 8 is transferred to the recording unit 8a.

  The monitor 9 displays a determination result indicating whether or not each component 6 attached to the engine 4 is correctly attached. In this example, a monitor of a personal computer is shown. Instead, a simple display device such as a liquid crystal display panel or an error display lamp may be used.

  The reading unit 10 is formed in a ring shape so that, for example, the conveyor 3 passes through, and a communication unit 10 a having a wireless communication function with the RF tags 5 and 7 is disposed in the ring. The communication unit 10a is configured to rotate in a ring as indicated by an arrow r, for example, and configured to be able to irradiate weak radio waves for wireless communication from different angles to the engine 4 located in the ring. ing. It is also conceivable that a large number of communication units 10a are fixedly arranged in the ring so that they can communicate with the RF tags 5 and 7 from different angles.

  Therefore, even if each of the RF tags 5 and 7 is disposed at a position such as the lower surface or the back of the engine 4 that cannot be easily found by an operator, the reading unit 10 is surely connected to these RF tags. The type information Id4 and Id6 can be read by communicating with the devices 5 and 7. Further, the reading unit 10 configured as described above can reliably communicate at a position closest to each of the RF tags 5 and 7 even with extremely weak radio waves. That is, it is possible to more reliably read only the type information Id4 and Id6 of the RF tags 5 and 7 attached to the engine 4 to be read and its components 6 instead of the front and rear engines 4.

  The host information processing apparatus 11 performs overall control of the transport line 2 and controls its driving and stopping, and also communicates with the production instruction apparatus 13 disposed in each work station 12 to A table Ta for instructing the assembly of each component 6 handled by each work station 12 can be transferred into the storage unit 13a of the production instruction device 13.

  The reading unit 14 is, for example, a handy type reader, and communicates with the RF tag 5 by being brought close to the RF tag 5 attached to the engine 4 to obtain the type information Id4 of the engine 4. Further, the output device 15 has display devices 15A, 15B... (See FIG. 2) indicating the types of components 6 to be assembled in accordance with the type information Id4 of the engine 4 read by the reader 14. That is, the operator knows the part 6A to be assembled to the engine 4 from different types of parts 6A, 6B (see FIG. 1) by reading the type of the engine 4 using the reader 14 or the like. This part 6A can be assembled.

  In the above example, an oil pan is assembled as an example of the parts 6..., But various different parts 6 are assembled to the engine 4, and each of the parts 6. Needless to say, the RF tag 7 on which the information Id6 is recorded is attached.

  The erroneous missing item inspection apparatus 1 configured as described above is for inspecting the engine 4 assembled using the transport line 2, and communicates when the assembled engine 4 is located in the reading unit 10. The unit 10a can read the type information Id4 and Id6 from the RF tags 5 and 7, respectively. At this time, communication between the communication unit 10a and the plurality of RF tags 5 and 7 can be performed almost simultaneously, so that this reading can be performed quickly.

  Next, by referring to the component list data T recorded in the recording unit 8a using the read engine 4 and component 6 type information Id4, Id6, each component 6 assembled in the engine 4 is correctly It can be determined whether it is attached. Then, as shown in Table 2, the determination result of each component attached to the engine 4 is shown as a determination result list T ′, and this list T ′ is displayed on the monitor 9. This list of determination results shows the type number (part code) of the parts related to the engine 4 subjected to the assembly check from the parts list data T and the determination results.

  As shown in Table 2, the type information of the engine 4 is used as a title, the name of each component 6 to be assembled to the engine 4, the type information of the component, the component 6 read by the reading unit 10, and the determination result. By indicating this as a list T ′, the inspection operator can easily determine which part has an assembly error (including assembly leakage). In the example shown in Table 2, since the determination result is only “NG” for the plug row, the plug type information assembled in the engine 4 is the correct plug type information “10-AA” (see also Table 1). Is shown to be different. In this way, since the information processing apparatus 8 is good at processing for comparing and collating a large amount of information, the assembly check can be performed accurately and quickly.

  Further, when the components are not correctly attached to the engine 4, that is, the type information of the components 6 read by the reading unit 10 in all the components 6 to be assembled to the engine 4 is shown in the component list data T. If it does not match (including assembly failure), a warning sound is transmitted using the buzzer 8b. Further, the information processing device 8 has a stop signal output function for outputting a transport stop signal St of the transport line 2 of the engine 4 to the host information processing device 11 when an abnormality is detected in the assembly check. The information processing apparatus 11 performs the primary stop of the transport line 2 when receiving the transport stop signal St.

  On the other hand, the inspection worker hears a warning sound and can see that there is a mistake in the assembly of the plug by looking at Table 2 displayed on the monitor 9. And since the said conveyance line 2 stops temporarily, while removing the engine 4 with the assembly mistake from the conveyance line 2, the conveyance line 2 can be moved again, and the reworking operation | work of the engine 4 with the assembly mistake can be performed. it can.

  FIG. 3 is a view showing a modification of the RF tags 5 and 7. As shown in FIG. 3, a code display section 7b (5b) in which, for example, a QR code two-dimensional symbol (may be a JAN code barcode symbol) or a character is printed on the surface of the RF tag 7 (5). And the operator visually checks the type of the component 6 (or engine 4) using the code display portion 7b (5b) or includes a bar code reader (which reads QR codes and characters). Etc.) may be used for confirmation. That is, the reading unit 10 includes the communication unit 10a that can read the type information Id4 and Id6 from the RF tags 5 and 7, but the code display units 5b and 7b are provided on the surface of the RF tag 5 and 7. By forming the information, it is possible to read the type information Id4 and Id6 from the code display units 5b and 7b when the communication unit 10a cannot read the electromagnetic wave, and the reliability can be improved.

  FIG. 4 is a plan view showing a second embodiment in which a transport line for quickly performing the reworking operation is formed. In FIG. 4, members denoted by the same reference numerals as in FIGS. 1 to 3 are the same or equivalent members, and thus detailed description thereof is omitted. In the example shown in FIG. 4, the transport line 2 includes a normal transport line 2A for assembling the components 6 to the engine 4, a reworking transport line 2B different from the transport line 2A, and the normal transport line. And a transfer device 20 for transferring the engine 4 from the normal transfer line 2A to the correction transfer line 2B on the downstream side of the 2A error missing item inspection device 1.

  In the example shown in FIG. 4, when the missing part inspection apparatus 1 performs the assembly check, if the parts are not correctly attached to the engine 4, the transfer line switching signal R is output to the transfer apparatus 20. The transfer device 20 transfers the engine 4 having an improper assembly to the rework line 2B. That is, the transfer device 20 of this embodiment functions as a transport line switching mechanism.

  As a result, the engine 4 with poor assembly can be transported, for example, in the direction of arrow B opposite to the transport direction A of the normal transport line 2A by the conveyor 3 constituting the transport line 2B, and the necessary repair work can be performed. it can. Next, the engine 4 that has finished reworking is returned to the normal transport line 2A again.

  Regardless of the flow of the normal transport line 2A, the transport line switching mechanism 20 for switching the transported engine 4 to the transport line 2B for reworking is formed as in the above embodiment. Rework can be done. In other words, since only the engine 4 having the poor assembly can be automatically separated without stopping the normal transport line 2A, the work efficiency is improved. In the present embodiment, an example in which the transfer device of the engine 4 is used as the transport line switching mechanism 20 is shown, but it goes without saying that the present invention is not limited to this. Further, while the transport line switching mechanism 20 is operating, the flow of the transport line 2A may be temporarily stopped.

  FIG. 5 is a diagram showing the configuration of the erroneous missing item inspection apparatus 30 according to the third embodiment. In FIG. 5, members denoted by the same reference numerals as in FIGS. 1 to 4 are the same or equivalent members, and thus detailed description thereof is omitted.

  In the example shown in FIG. 5, the main difference from the one shown in FIGS. 1 to 4 is the configuration of the reading unit 31 of the code display units 5 b and 7 b, and the reading unit 31 in the erroneous missing item inspection apparatus 30 of the third embodiment is a code. It is a leader. By using the code reader 31 as the reading unit, it is possible to greatly reduce the manufacturing cost of the erroneous missing item inspection device 30. Reference numeral 5 ′ denotes a plate-like tag attached to the engine 4, and the code display portion 5 b is printed on the surface thereof. On the other hand, 7 b ′ is a code display unit made up of a two-dimensional QR code symbol (which may be a bar code or a character) formed on the component 6 by engraving.

  The inspection operator first holds the code reader 31 and reads the type information Id4 of the engine 4 from the code display portion 5b formed on the engine 4 to be subjected to the assembly check. Next, the type information Id6 of each part 6... Is read from the code display portion 7 b ′ formed on each part 6. The erroneous item inspection device 30 can perform the assembly check using the read type information Id4 and Id6 in the same manner as in the first and second embodiments.

  By configuring as in the third embodiment, the manufacturing cost of the error missing item inspection device 30 can be reduced and the code reader 31 can be made as small as possible. It can also be a type. Further, since the code display portions 5b and 7b 'can be formed at a relatively low cost, it can contribute to cost reduction.

  In the third embodiment, the type information Id4 and Id6 can be clearly shown by printing the code display portions 5B and 7b on some tag including the RF tags 5 and 7. On the other hand, the manufacturing cost can be reduced by making the surface directly stamped on the surface of the component 6... Or the like like the code display portion 7b ′, and there is no space for sticking a tag-like one. Even if it is a part, it is possible to engrave the code display part on the surface.

  Further, in each of the above-described embodiments, an example of inspecting each component 6... In the engine assembly factory is shown, but the present invention is not limited to this configuration, and other workpieces are assembled. It may be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a configuration of an error missing item inspection apparatus and an error missing item inspection method according to a first embodiment of the present invention. FIG. 2 is a block diagram of the erroneous missing item inspection apparatus. It is a figure which shows the modification of a tag. It is a figure which shows the structure of the mistake missing item inspection apparatus concerning 2nd Example of this invention, and its periphery. It is a block diagram which shows the structure of the mistaken missing-goods inspection apparatus concerning 3rd Example of this invention. It is a figure which shows the structure of the conveyance line in the conventional engine assembly factory, and its periphery. It is a figure which shows the structure of the conventional production instruction | indication apparatus.

Explanation of symbols

1,30 Incorrect product inspection device 2 Transport line 2A Normal transport line 2B Repair line 4 Work 5 Tag 5a Memory 5b Display unit 6 Parts 7 Tag 7a Memory 7b, 7b 'Display unit 8a Recording unit 8b Sound generation unit 8c Processing unit 9 Display device 10, 31 Reading unit 10a Communication unit 20 Transport line switching mechanism Id4 Engine type information Id6 Parts type information St Transport stop signal T Parts list data T 'List of determination results

Claims (8)

  This is a device that inspects for missing parts of workpieces to which parts are assembled. Each part has a tag that records at least its type information, and the type information from the tag attached to the part that is assembled to the work. A reading unit for reading the workpiece, a recording unit in which a part list data indicating the type of the workpiece and the type of the component to be assembled to each workpiece, and the read type information and the component list data are used for the workpiece. And a processing unit that performs processing for inspecting whether or not a component is attached.   2. The wireless recognition non-contact IC tag including a memory in which the type information is recorded, and the reading unit includes a communication unit that performs non-contact communication with the non-contact IC tag. Incorrect item inspection device described in 1.   This is a device for inspecting a workpiece for mistaken parts in which parts are assembled, and each part has at least a symbol display part indicating its type information. A reading unit that reads type information, a recording unit that records part list data indicating the type of work and the type of parts to be assembled into various works, and a work using the read type information and part list data And a processing unit that performs processing for inspecting whether or not a component is correctly attached to the device.   The erroneous missing item inspection device according to any one of claims 1 to 3, further comprising a display device that displays a determination result of each component assembled to the workpiece.   5. The erroneous missing item inspection apparatus according to claim 1, further comprising a sound generation unit that notifies an abnormality by sound when a component is not correctly attached to the workpiece.   6. The error deficiency according to claim 1, further comprising a stop signal output function for outputting a conveyance stop signal to a control unit of a workpiece conveyance line when a component is not correctly attached to the workpiece. Product inspection equipment.   The conveyance line switching mechanism which switches so that a workpiece | work may be conveyed to the conveyance line for repair different from a normal conveyance line when the components are not correctly attached to the said workpiece | work. Missing item inspection device. At least a tag or display unit that records the type information of the work is attached to the work, and a tag or display unit that records at least the type information of each part is attached to each part assembled to the work. The parts list data indicating the type of parts and the types of parts to be assembled to various workpieces is recorded, and the workpiece and part type information is read from the tag or display part attached to the workpiece and the parts assembled to this workpiece. A method of inspecting an erroneous product, characterized by checking whether or not a part is correctly attached to a workpiece using these types of information by collating with list data.

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