JP2006130639A - Work guidance device and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work guidance device and its method, guiding a worker's line of sight to a working position without separating the line of sight from a work object, giving no constraints on a specified work speed to the worker, automatically determining the end of work, objectively judging that the work is done correctly as instructed, and automatically altering the type of a work object. <P>SOLUTION: This work guidance device for guiding the work for a single work object placed on a working stage or the work object with a jig includes: a work guidance information storage means 1; a machine type information reading means 2; a control means 3; a spot light radiating means 4; a power tool operating condition detecting means 5; and a weight measuring means 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a work guidance apparatus and method for instructing a worker about work contents such as product assembly at a production site such as a factory.

  In today's production sites such as factories, in order to respond to the diversification of products due to market demands, multi-variety mixed flow production is required. On the other hand, since the fixing rate of workers has been decreasing, production dependent on the skills of conventional skilled workers cannot be performed. For this reason, on the production site of products, from the production of a single line by a conventional conveyor, a production system that is adapted to the work capacity of each worker, generally called a cell production method, or a plurality of lines called a cell production method. Attention has been paid. This cell production method is evaluated as a flexible production method because it can absorb the deviation of the work speed of the worker in the tact time of the entire production line.

  In order to perform such multi-mix mixed production, it is necessary to switch to a different product assembly operation for each product in the production line, and the operator needs to follow the work contents for each product. . For this reason, the worker must confirm the work using the work procedure manual or manual, but it takes time to confirm the work using the work procedure manual or manual, resulting in a time loss that is not directly related to production.

  Therefore, in order to reduce such time loss, a method has been devised in which a work procedure manual showing the procedure of production work and a work procedure content of a printed matter such as a manual are displayed on a display screen and shown to the operator. However, in order to perform the work while checking the display screen during the assembling work, it is necessary to move the operator's line of sight, which is a factor that neglects the work itself. For this reason, this method does not necessarily lead to an improvement in the speed of assembling work and an improvement in assembling quality, and a change in the parts assembling contents due to the model change requires confirmation and learning of the work contents of the worker.

In view of this, various methods have been conventionally proposed as methods for reducing the movement of the operator's line of sight by using a light spot (see, for example, Patent Document 1). As a method for displaying the work position using the light spot, for example, there is an electronic piano performance guide method for irradiating the keyboard of the electronic piano with the light spot. This electronic piano performance guide method using light guides the playing order of the keyboard and the keyboard position with a light spot. The method described in Patent Document 1 guides the component insertion position and component insertion direction on a printed circuit board by a light spot. These methods are effective as a method for reducing the movement of the operator's line of sight because the operator's line of sight can be guided to the work position without leaving the work object.
Japanese Patent Laid-Open No. 2001-210991

  However, the above conventional method has the following problems. For example, in an electronic piano performance guide method using light, the performer must perform at the speed at which the spot of light moves, forcing the performer to a predetermined performance speed.

  In addition, the method described in Patent Document 1 merely instructs the worker about the component assembly position, such as the component insertion position, with a light spot, and does not impose a specific work speed on the worker. Thus, it differs from the above-described electronic piano performance guide method. However, whether or not the work has been correctly performed according to the instruction is left to the operator's own judgment, and it is difficult to make an objective judgment at that time.

  In addition, this method employs a mechanism for pressing the part assembly completion button when the operator determines that the part assembly has been completed. A method of pressing the part assembly completion button every time this part assembly is completed. Has led to an increase in man-hours.

  In addition, this method has a mechanism to switch the model by the operator's operation after the operator determines the model when switching the data indicating the part assembly position for each model when changing the model of the work target. Adopted. However, when changing models, the specifications may differ slightly depending on the destination or supply store, even if they seem to be the same, and it is difficult for the operator to accurately determine this and switch the model. Met.

   Accordingly, the present invention has been made to solve the above-described problem, and can guide the operator's line of sight to the work position without leaving the work object, and allows the worker to work at a specific work speed. Work that can automatically determine that the work has been completed, can objectively determine that the work has been performed correctly as instructed, and can automatically change the model of the work object. It is an object of the present invention to provide a guidance device and a method thereof.

  FIG. 1 is a block diagram showing the configuration of the work guidance apparatus of the present invention. In FIG. 1, the work guidance device of the present invention is a work guidance device for guiding work on a single work object placed on a work stage or the work object with a jig, It comprises a guidance information storage means 1, a model information reading means 2, a control means 3, a spot light irradiation means 4, a power tool operating state detection means 5, and a weight measurement means 6. Yes.

  The work guidance information storage unit 1 has a function of storing work guidance information for each model of the work target. The model information reading means 2 has a function of reading model information provided on the work object or jig. The control means 3 extracts the work guidance information of the model read by the model information reading means 2 from the work guidance information storage means 1 and extracts the work instruction information from the work guidance information according to the order instructed in the work guidance information. It has a function. The spot light irradiating means 4 has a function of irradiating spot light to the work position on the work object based on the work position information in the work instruction information provided by the control means 3 and notifying the worker of the work position. Have. The power tool operating state detecting means 5 has a function of detecting the position of the power tool and detecting the operation content of the power tool in the work performed by the operator using the power tool. The weight measuring means 6 has a function of measuring the weight of the work object after the work is finished.

  Then, the control means 3 matches the position of the electric tool detected by the electric tool operating state detecting means 5 with the position indicated by the work position information, and the operation content of the electric tool detected by the electric tool operating state detecting means 5 is the same. If the work content in the work instruction information matches the operation content and the weight of the work target after the work measured by the weight measuring means 6 matches the weight in the work instruction information, the work instructed by the work instruction information is normal. Has a function of making an end-of-work determination to determine that the process has ended.

  That is, for example, when the work content is assembly of parts, the above work guidance device guides the operator's work by irradiating spot light for each attached part, and confirms that the accurate assembly work has been performed. The completion of the work is determined by checking the tool operating state and the work guidance information, or by checking the weight measurement result after the work is finished and the work guidance information. In this way, work guidance is performed for all the assembled parts.

  According to the work guidance device described above, the operator's line of sight can be guided to the work position without being separated from the work object, and the work is not forced to impose a specific work speed on the worker. Can be automatically determined, and it can be objectively determined that the work has been correctly performed as instructed.

  Further, since the model information reading means 2 reads the model information provided in the work object or jig, the model of the work object can be automatically changed.

  Further, since the weight measurement after the work is completed and the determination based on the weight measurement are performed for each work instructed by the work instruction information, the necessary work can be checked without omission and a careless mistake can be easily prevented.

  In the above work guidance apparatus, the control means 3 provides for the operator to easily acquire the parts used for the work prior to or substantially simultaneously with the spot light irradiation means 4 irradiating the spot light with the point light. It is preferable to provide a part location notification means for notifying the worker of the part location based on the part location information in the work instruction information. In this case, as the part location notification means, the part location voice guidance means for guiding the part location by voice, or the part location spot light irradiation means 4 for irradiating spot light at the part location is used. Also good.

  By doing in this way, the operator can acquire the components used for work easily and with minimal movement of the line of sight.

  Further, in the above work guidance device, the spot light irradiation means 4 may radiate a plurality of points at the same time by dispersing the spot light using a reflector or a beam splitter or both. .

  In the above work guidance device, the work stage may be movable by using an automatic transfer device such as a belt conveyor as the work stage. In this case, even if the work stage is moved, the model information reading means 2, the spot light irradiation means 4, the power tool operating state detecting means 5, and the weight measuring means 6, or in addition to these, the parts location reporting means Is used, the parts location reporting means is provided with a mechanism that functions correctly. By doing in this way, it can respond flexibly to a production system.

  The work guidance apparatus includes worker information input means for inputting worker information, and the control means 3 detects the operation state of the electric tool from the point in time when the spot light irradiation means 4 irradiates the spot light. It is preferable that the work time until the time point when the means 5 detects the operation content of the power tool is measured and stored in the work guidance information storage means 1 as log data together with the worker information.

  In this way, the work guidance device can be improved based on the log data.

  In the above work guidance device, the spot light irradiation means 4 simultaneously irradiates a plurality of positions as work positions with respect to a plurality of pieces of work instruction information having the same work contents and different work positions in the same order. At the same time, the worker can work freely without worrying about the order of work. Further, the control means 3 performs the above-described work end determination when it is determined that all the work specified by the plurality of work instruction information has been normally completed regardless of the order of the work performed by the worker. Can do.

  By doing in this way, the operator can be given a degree of freedom with respect to the order of work, and this can lead to an increase in the ability of the worker.

  The work guidance apparatus includes worker information input means for inputting worker information, and the control means 3 detects the operation state of the electric tool from the point in time when the spot light irradiation means 4 irradiates the spot light. The work guidance information storage means 1 measures the work time up to the time point when the means 5 detects the operation content of the electric tool, and records the work time and the order of the work performed by the worker as log data together with the worker information. It is preferable to memorize.

  By doing in this way, work efficiency can be measured and it can lead to an operator's capability raise.

  In the work guidance apparatus, the control means 3 is the same model based on the work time for each of the plurality of workers stored in the work guidance information storage means 1 as log data and the order of the work performed by the workers. It is preferable that the work order with the shortest work time is extracted, and the work guidance information is automatically corrected based on the extracted work order. In this way, a learning function for automatically improving the work guidance device can be provided.

  In the work guidance apparatus, a computer can be used as the control means 3 and a storage device of the computer can be used as the work guidance information storage means 1. In this case, a storage medium such as an FD, MD, MO, CD, DVD, memory card, or RFID may be used as the work guidance information storage unit 1 instead of the storage device of the computer.

  Next, the work guidance method of the present invention will be described. The work guidance method of the present invention is a work object using a database consisting of work guidance information for each model of a single work object placed on a work stage or the work object with a jig. A work guidance method for an object, which includes a model information reading process, a work instruction information extracting process, a parts location reporting process, a spot light irradiation process, a power tool operating state detection process, a weight measurement process, and a work end. And a determination process.

  The model information reading step has a function of reading model information provided on the work object or jig. The work instruction information extraction process has a function of extracting the work guidance information of the model read in the model information reading process from the database and extracting the work instruction information in the order instructed by the work guidance information. The part location notification process has a function of notifying the worker of the part location based on the part location information in the work instruction information. The spot light irradiation process has a function of irradiating spot light to the work position on the work object based on the work position information in the work instruction information and notifying the worker of the work position.

  The power tool operating state detecting step has a function of detecting the position of the power tool in the work and detecting the operation content of the power tool when the worker performs the work using the power tool. The weight measurement process has a function of measuring the weight of the work object after the work is finished. In the work end determination step, the position of the electric tool detected in the electric tool operation state detection step matches the position indicated by the work position information, and the operation content of the electric tool detected in the electric tool operation state detection step is also the same. If the work content in the work instruction information matches the operation content and the weight of the work target after the work measured in the weight measurement process matches the weight in the work instruction information, the work instructed in the work instruction information is normal. Has a function of making an end-of-work determination to determine that the process has ended.

  In the work guidance method described above, prior to the model information reading step, provided with an operator information input step, from the spot light irradiation step to the power tool operating state detection step, in parallel with these, provided with a work time measurement step, A log data recording step may be provided after the work end determination step. The work guidance method including these steps is a work guidance method for a case where there are a plurality of pieces of work instruction information in the same order having the same work contents and different work positions as the work instruction information.

  In this work guidance method, the worker information input process has a function of inputting worker information. The spot light irradiation process has a function of simultaneously irradiating a plurality of locations as work positions. The work time measurement step has a function of measuring the work time from the point of spot light irradiation in the spot light irradiation step to the point in time when the operation content of the power tool in the power tool operation state detection step is detected. When the work end determination process determines that all of the work instructed by the plurality of work instruction information has been normally completed regardless of the order of the work performed by the operator in the power tool operating state detection process, the above-described work end determination process is performed. It has the function to perform. In the log data recording process, the work time measured in the work time measurement process and the order of work performed by the worker in the power tool operating state detection process are recorded in the database as log data together with the worker information. It has the function to do.

  In the above work guidance method, a work guidance information correction process is provided after the log data recording process, and the work guidance information correction process includes work times for a plurality of workers stored in the database as log data. It is preferable to extract a work order having the shortest work time from the work order performed by the worker and to have a function of correcting work guidance information based on the extracted work order.

  Each work guidance method described above has the same operations and effects as the work guidance device described above.

  According to the present invention, for each work position on the work object, the position where the worker should work is notified by spot light irradiation, and that the correct assembly work has been performed, The completion of the work can be determined for all the assembled parts by confirming by collation or by comparing the weight measurement result after the work and the work guidance information.

  Therefore, the operator's line of sight can be guided to the work position without being separated from the work object, and the operator is not forced to have a specific work speed and can automatically determine that the work has been completed. In addition, it can be objectively determined that the work has been correctly performed as instructed.

  Further, since the model information reading means reads the model information provided in the work object or jig, the model of the work object can be automatically changed.

  Further, since the weight measurement after the work is completed and the determination based on the weight measurement are performed for each work instructed by the work instruction information, the necessary work can be checked without omission and a careless mistake can be easily prevented.

  In addition, the work time from the point of spot light irradiation to the time when the operation content of the power tool is detected is measured, and the work time and the order of the work performed by the worker are stored as log data. be able to. Therefore, the work efficiency can be measured based on the log data, the work guidance device can be improved, and the ability of the worker can be increased.

  In addition, for a plurality of work instruction information having the same work contents and different work positions in the same order, it is possible to simultaneously irradiate a plurality of positions as work positions with spot light and the operator cares about the work order. You can work freely without having to. In addition, regardless of the order of the work performed by the worker, it is possible to determine the work end by determining that all the work specified by the plurality of work instruction information has been normally completed. Therefore, the operator can be given a degree of freedom with respect to the order of the operations, and this can lead to an increase in the ability of the operator.

  In this case, since the order of the work performed by the worker can be recorded as log data together with the information and work time of the worker, the order of the work with the shortest work time in the same model can be recorded based on the log data. The work guidance information can be automatically corrected based on the extracted work order. Therefore, a learning function for automatically improving the work guidance device can be provided.

  Hereinafter, a work guidance device according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 is an external view of the work guidance apparatus, and FIG. 3 is an explanatory view showing the configuration of the work guidance apparatus.

  2 and 3, this work guidance device is a device that performs work guidance that is useful for the worker 31 to work on the assembly target product 22 placed on the work stage 21. In the present embodiment, the work guidance device performs work guidance by assembling parts to the assembly target product 22 with screws. It is tightened with the electric screwdriver 23. The parts and screws used for assembly are stored in a parts tray (not shown) disposed around the work stage 21.

  As shown in FIG. 3, the work guidance device includes a work guidance information database 11, a model information reading unit 12, a work guidance control unit 13, an assembly position spot light irradiation unit 14, an electric tool operating state detection unit 15, The weight measuring unit 16, worker information input means (not shown), and a component tray spot light irradiation unit are included. A computer installed below the work stage 21 is used for the work guidance control unit 13. The work guidance information database 11 is held in a storage device such as an HDD of the computer that constitutes the work guidance control unit 13. The assembly position spot light irradiation unit 14 includes a spot light irradiation unit 14a and a position designation unit 14b, and the power tool operating state detection unit 15 includes a spot light emission unit 15a, a spot light reception unit 15b, and a torque increase. It is comprised with the detection part 15c. Moreover, the spot light irradiation part 14a of the assembly position spot light irradiation part 14 and the spot light receiving part 15b of the electric tool operating state detection part 15 are integrally formed.

  In the present embodiment, the assembly target product 22 that is the target of the work guidance is provided with RFID (Radio Frequency Identification) having model information in order to represent the model of the assembly target product 22. A barcode having a code display may be used. This barcode may be one-dimensional or two-dimensional. When a jig for the assembly target product 22 is used, the jig can be provided with an RFID or a barcode. This jig is usually used to protect the assembly target product 22. The model information stored in the RFID or the like includes various types of information such as the destination and product color in addition to the product model.

  Further, when the assembly target product 22 is placed on the work stage 21, the work stage 21 is used in order to ensure that the operation of the assembly position spot light irradiation unit 14 and the power tool operating state detection unit 15 is performed accurately. It is necessary to install it precisely at a predetermined position. For this reason, a fixing guide may be provided on the work stage 21 to fix the assembly target product 22.

  The work guidance information database 11 is composed of work guidance information, and this work guidance information is composed of programs and data used for controlling the work guidance apparatus. In the present embodiment, the work guidance information database 11 is stored in a storage device such as an HDD of the computer that forms the work guidance control unit 13 as described above. However, a storage medium such as an FD, MD, MO, CD, DVD, or memory card may be used instead of the HDD of the computer. Alternatively, the work guidance information database 11 may be stored in an RFID provided in the assembly target product 22 in the same manner as the above-described model display. In addition, when a jig is used for the assembly target product 22, the jig can be provided with an RFID. In these cases, the work guidance control unit 13 reads work guidance information using an RFID reader.

  Work instruction information which is data of work guidance information is configured for each work, and FIG. 4 is a list showing an example of the work instruction information. In FIG. 4, each row in the horizontal column indicates one work instruction information. One work instruction information includes assembling order, assembling part information, spot light irradiation position, electric tool to be used, total weight of assembly target product at the time of assembling, and storage part tray / shelf number of assembling parts. It consists of

  Although not shown, the worker information input unit is installed below the work stage 21 and has a function of inputting information related to the worker 31 such as the name and ID code of the worker 31 using a keyboard. The input information is sent to the work guidance control unit 13. Alternatively, the worker 31 may wear the RFID and use an RFID reader as the worker information input unit. In this case, the RFID is provided with information such as the name of the worker 31 and an ID code, and the RFID reader reads the information.

  The model information reading unit 12 has a function of reading the model of the assembly target product 22. The assembly target product 22 includes an RFID having information indicating the model of the assembly target product 22, and the model information reading unit 12 uses an RFID reader for reading the RFID. The RFID reader is installed so as to face the RFID attached to the side of the work stage 21, and as the RFID reader, a close-contact type RFID having a frequency of 13.56 MHz used in close contact with the RFID during reading is used. A reader is desirable. By adopting the close contact type, it is possible to prevent misrecognition of other assembly target products, and by bringing the RFID reader into close contact with the RFID attached to a predetermined position of the assembly target product 22 at a predetermined position. This is because there is a merit that it can be confirmed that the assembly target product 22 is accurately fixed at the predetermined position described above. When the assembly target product 22 is provided with a one-dimensional or two-dimensional barcode, a one-dimensional or two-dimensional barcode reader is used. This bar code reader may use infrared rays.

  The work guidance control unit 13 has a function of performing overall control of the work guidance device, and a computer is used for the work guidance control unit 13 as described above. The work guidance control unit 13 extracts work guidance information corresponding to the model from the work guidance information database 11 based on the model information read by the model information reading unit 12. Then, according to the order instructed in the extracted work guidance information, the work guidance information is extracted from the work guidance information and the work guidance is performed. Further, the work guidance control unit 13 receives various information from the following units and makes various determinations, as well as a work end judgment, work time measurement, and log data work guidance information database 11 described later. To record the work guidance information based on the log data.

  The assembly position spot light irradiation unit 14 has a function of irradiating spot light on the assembly target product 22 in order to indicate the assembly position of the component and the screwing position. As described above, the assembly position spot light irradiation unit 14 includes the spot light irradiation unit 14a and the position designation unit 14b. The spot light irradiation unit 14a is configured so that the light irradiation direction is directed downward. It is attached to the position specifying part 14b. The spot light irradiation unit 14a has a function of generating spot light to be irradiated on the assembly target product 22, and the spot light irradiation unit 14a emits laser light or light having excellent straightness. A light emitting element or the like is used. As described above, the spot light irradiation unit 14a is formed integrally with a spot light receiving unit 15b of the power tool operating state detection unit 15 described later.

  The position specifying unit 14b has a function of moving the spot light irradiation unit 14a to a position where the spot light is irradiated, and a cross-shaped XY positioning device is used as shown in FIG. This XY positioning apparatus is supported by a support portion 24 provided around the work stage 21 so as to be positioned directly above the work stage 21. Further, the XY positioning device used for the position specifying unit 14b has a role of accurately moving the spot light irradiation unit 14a to the spot light irradiation position. 22 is provided with a reference point that is set in advance so as to exactly match the reference point of the work stage 21 on which 22 is placed. The position designation unit 14b uses the reference point as a starting point based on the work position information such as the position of the component and the screwing position included in the work instruction information of the work guidance information provided from the work guidance control unit 13. The irradiation unit 14a is moved.

  Further, the position specifying unit 14b, for a plurality of work instruction information in the same order with different screwing positions, sets a plurality of different screwing positions on the assembly target product 22 based on the plurality of work instruction information. On the other hand, spot light can be irradiated substantially simultaneously.

  Although not shown, the component tray spot light irradiating unit irradiates the component tray with spot light in order to indicate the location of the component tray containing the components and screws used for assembly to the assembly target product 22. It has a function to do. The component tray is disposed around the work stage 21 as described above. The component tray spot light irradiation unit is configured in the same manner as the assembly position spot light irradiation unit 14, and includes screw storage tray information included in the work instruction information of the work guidance information provided from the work guidance control unit 13. Based on this, spot light is applied to a component tray that houses the corresponding component or screw. The spot light irradiation may be performed on the component itself depending on the component. The spot light irradiation to the component tray by the component tray spot light irradiation unit is performed prior to or substantially simultaneously with the spot light irradiation by the assembly position spot light irradiation unit 14.

  In accordance with the spot light irradiation of the component tray spot light irradiation unit and the assembly position spot light irradiation unit 14, the worker 31 acquires the components and screws to be assembled to the assembly target product 22, and the assembly target. Assembling work to the product 22 is performed.

  The power tool operating state detection unit 15 has a function of checking whether or not the assembly target product 22 is correctly assembled at the position irradiated with the spot light by the assembly position spot light irradiation unit 14. As described above, the spot light emitting unit 15a, the spot light receiving unit 15b, and the torque-up detecting unit 15c are configured. The spot light emitting unit 15a is provided at the rear end portion of the electric driver 23. When the operator 31 positions the electric driver 23 to tighten the screw and turns on the drive switch provided in the electric driver 23, A spot light is emitted upward.

  As described above, the spot light receiving unit 15b is formed integrally with the spot light irradiation unit 14a of the assembly position spot light irradiation unit 14, and is formed around the spot light irradiation unit 14a. A light receiving element such as a CCD is used for the spot light receiving portion 15b, and the light receiving elements such as a CCD are arranged in a matrix with the surface facing downward. The spot light receiving unit 15b detects the received position by receiving the spot light emitted from the spot light emitting unit 15a provided at the rear end of the electric driver 23, and controls the detected information to work guidance control. Tell part 13. The work guidance control unit 13 determines whether or not the position where the electric screwdriver 23 is operated is the correct position based on whether or not the detection information matches the information on the screwing position included in the work instruction information of the work guidance information. To do.

  The torque-up detection unit 15c is attached to the support unit 24, and detects a torque-up of the electric driver 23 when a drive switch provided in the electric driver 23 is turned on. This torque increase is detected by monitoring the current supplied to the electric screwdriver 23 and detecting that a specific change has occurred. The torque-up detection unit 15 c transmits the detected torque-up information to the work guidance control unit 13. The work guidance control unit 13 determines whether or not the electric driver 23 has been correctly operated based on whether or not the torque up information matches the torque up information included in the work instruction information of the work guidance information.

  The weight measuring unit 16 has a function of measuring the weight of the assembly target product 22 after the parts are assembled, and is installed on the work stage 21, and is mounted on the weight measuring unit 16. A product 22 is placed. The weight measuring unit 16 has an accuracy capable of measuring even the lightest screw unit. Further, the weight measuring unit 16 transmits the measured weight to the work guidance control unit 13 as weight information. The work guidance control unit 13 that has received this weight information determines whether or not a correct part has been assembled depending on whether or not the weight information matches the weight information included in the work instruction information of the work guidance information. The mechanism of this judgment is that the weight information included in the work instruction information for each work in the work guidance information is increased by the weight of the parts used for each work compared to the previous work. It is based on.

  Next, the operation of the work guidance device in the present embodiment will be described. FIG. 5 is a flowchart showing the operation of the work guidance apparatus in the present embodiment. The operation of this work guidance device is as follows: worker information input process, model information reading process, work instruction information extracting process, parts location reporting process, spot light irradiation process, power tool operating state detection process, weight measurement process, work end determination The process includes a process and a log data recording process, and a working time measurement process that coexists with the spot light irradiation process to the power tool operation state detection process.

  First, in the worker information input step (S1), the worker 31 uses the worker information input unit to input information about the worker 31 such as the name and ID code of the worker 31.

  Next, in the model information reading step (S2), the RFID reader of the model information reading unit 12 reads information representing the model of the assembly target product 22 from the RFID provided in the assembly target product. When the assembly target product 22 is provided with a one-dimensional or two-dimensional barcode, a one-dimensional or two-dimensional barcode reader is used instead of the RFID reader.

  Next, in the work instruction information extraction step (S3), the work guidance control unit 13 converts the work guidance information corresponding to this model based on the model information read by the model information reading unit 12 into the work guidance information database 11. Extract from If the work guidance information corresponding to the model is not extracted from the work guidance information database 11 in this work instruction information extracting step (S3) (S4), “No corresponding work guidance information” is displayed (S14). The operation is stopped (S16). This operation stop may be performed by voice. When the work guidance information corresponding to the model is extracted from the work guidance information database 11 (S4), the process proceeds to the next parts location reporting step (S5). In this case, the work guidance control unit 13 extracts the work instruction information according to the order instructed in the work guidance information, and controls the work guidance device according to the work guidance information program and the work instruction information.

  In the parts location reporting step (S5), the parts tray spot light irradiation unit is based on the parts and screw storage tray information included in the work instruction information of the work guidance information provided from the work guidance control unit 13, and the corresponding parts. Irradiate spotlight to the component tray that houses the screws and screws. By irradiation with the spot light, the worker 31 can easily know the location of the parts and screws, and acquires the parts and screws.

  Next, in the spot light irradiation step (S6), the assembly position is based on the work position information such as the position of the component and the screwing position included in the work instruction information of the work guidance information provided from the work guidance control unit 13. The position specifying unit 14b of the spot light irradiation unit 14 moves the spot light irradiation unit 14a, and irradiates the assembly target product 22 with the spot light from the spot light irradiation unit 14a. By this spot light irradiation, the worker 31 can easily know the work position on the assembly target product 22. Therefore, the worker 31 assembles the parts and screws acquired in the part location notification step (S5) at the work position on the assembly target product 22, and performs work using the electric screwdriver 23 as necessary.

  Next, in the electric tool operating state detection step (S7), when the operator 31 performs an operation using the electric screwdriver 23, the electric tool operating state detector 15 detects the position of the electric screwdriver 23 in this operation. At the same time, the operation content of the electric screwdriver 23 is detected. That is, when the operator 31 positions the electric screwdriver 23 at the position of a part on the assembly target product 22 or the screwing position in order to tighten the screw, the driving switch provided in the electric screwdriver 23 is turned on. The spot light emitting unit 15a of the electric tool operating state detecting unit 15 emits the spot light upward. Then, this spot light is received by the spot light receiving unit 15 b of the power tool operating state detecting unit 15, the received position is detected, and the detected information is transmitted to the work guidance control unit 13. At the same time, the torque-up detection unit 15c of the electric tool operating state detection unit 15 monitors the supply current to the electric screwdriver 23 and captures the change from when the drive switch of the electric screwdriver 23 is turned on. 23 is detected and torque up information is transmitted to the work guidance control unit 13.

  Next, in the weight measurement step (S8), the weight measurement unit 16 measures the weight of the assembly target product 22 after the work is completed, and transmits the measured weight to the work guidance control unit 13 as weight information.

  Next, in the work end determination step (S9), the work guidance control unit 13 matches the position indicated by the work position information with the position of the electric screwdriver 23 detected in the power tool operating state detection step (S7). Similarly, the torque-up information of the electric screwdriver 23 detected in the power tool operation state detection step (S7) matches the torque-up information in the work instruction information, and after the work measured in the weight measurement step (S8) is completed. If the weight of the assembly target product 22 matches the weight in the work instruction information (S10), a work end determination is made to determine that the work instructed by the work instruction information has been completed normally. When the work end determination is made, the process proceeds to the next log data recording step (S11).

  If one or more of the position of the electric screwdriver 23, torque-up information, or the weight of the assembly target product 22 does not match the content of the work instruction information, that is, if the work is not completed normally ( S10) “Unsuccessful work” is displayed (S15), and the operation is stopped (S16). In this case, even if they do not completely match, it can be determined that the work has been completed normally if they are approximate. Further, it may be displayed simultaneously with the display of the operation stop which of the above does not match, that is, the reason why the work is not normally completed. Moreover, you may make it utter an audio | voice about operation stop and these reasons.

  In the working time measuring step (S13) coexisting with the power tool operating state detecting step (S7) from the spot light irradiating step (S6), the work guidance control unit 13 performs the spot in the spot light irradiating step (S6). The working time is measured from the point of light irradiation to the point of time when the torque of the electric screwdriver 23 is detected in the power tool operating state detection step (S7).

  Next, in the log data recording step (S11), the work guidance control unit 13 uses the work time measured in the work time measurement step (S13) as the worker information input in the worker information input step (S1). At the same time, it is recorded in the work guidance information database 11 as log data. FIG. 6 shows an example of this log data.

  When the above steps are completed, unless all the work instruction information has been processed (S12), the process returns to the work instruction information extraction step (S3) and the above steps are repeated. When the processing for all work instruction information is completed (S12), the operation of the work guidance device is finished.

  In the operation of the work guidance device described above, in the work instruction information extraction step (S3), the work guidance control unit 13, for example, as shown in FIG. When a plurality of pieces of work instruction information having the same work contents and different work positions in the same order are read, the following points are applied and processing slightly different from the above is performed.

  That is, in the spot light irradiation step (S6), the spot light is irradiated substantially simultaneously to a plurality of different screwing positions on the assembly target product 22. Therefore, the operator 31 performs the screw tightening operation for all the operation positions, and the operator 31 can freely determine the order. In the electric tool operating state detection step (S7), the electric tool operating state detection unit 15 detects the position of the electric screwdriver 23 and detects torque increase every time the electric screwdriver 23 is used. In the weight measurement step (S8), the weight measurement unit 16 measures the weight at the time when the work for all work positions is completed.

  In the work end determination step (S9), the work guidance control unit 13 checks the position of the electric driver 23 and the torque increase and checks the weight at the end of all work for all work positions. Then, the end of work is determined. Further, in the work time measuring step (S13), the work guidance control unit 13 starts from the first point irradiation point of the spot light in the spot light irradiation step (S6), and the electric screwdriver 23 in the electric tool operation state detection step (S7). Measure the working time until the last torque up detection. In the log data recording step (S11), the work time measured in the work time measurement step (S13) and the order of work performed by the worker 31 in the power tool operation state detection step (S7) are determined. Recorded in the database as log data together with 31 information. In FIG. 6, the column in which “Manufacturing No.” and “Worker” are shown shows an example of this log data, and the work time (required time) and the work for the work in the “reference setting” column. The order of the work performed by the worker 31 is recorded.

  In addition, when the work guidance information includes a plurality of work instruction information in the same order and having the same work contents and different work positions as described above, all work by a plurality of workers in all the above steps is performed. After completion, a work guidance information correction step is provided. In this work guidance information correction step, the work with the shortest work time is determined from the work time for each of the plurality of workers 31 stored in the work guidance information database 11 as log data and the order of the work performed by the workers 31. The order is extracted, and the work guidance information is corrected based on the extracted order of work. The column of “optimum assembly order” in FIG. 6 is an example in which log data of the work with the shortest work time is extracted from log data of the work time for each of a plurality of workers and the order of the work performed by the workers. Show.

  According to the work guidance device in the present embodiment described above, the work position of the worker 31 is informed by spot light irradiation for each work position on the assembly target product 22, and an accurate assembling work is performed. The end of each work can be determined by checking the operating state of the power tool and the work instruction information in the work guidance information, or by checking the weight measurement result after the work is finished and the work instruction information in the work guidance information. it can.

  Accordingly, the line of sight of the worker 31 can be guided to the work position without being separated from the assembly target product 22, and the worker 31 is not forced to have a specific work speed, and the work is automatically completed. And objectively determine that the work has been performed correctly as instructed.

  In addition, since the RFID reader of the model information reading unit 12 reads information indicating the model of the assembly target product 22 from the RFID provided in the assembly target product, the model change of the assembly target product 22 is automatically performed. Can be done.

  In addition, since the weight measurement by the weight measurement unit 16 after the work is finished and the judgment by the work guidance control unit 13 based on the weight measurement are performed for each work instructed by the work instruction information, necessary work can be checked without omission, Careless mistakes can be easily prevented.

  In addition, the working time from when the assembly position spot light irradiation unit 14 irradiates the spot light to the point when the power tool operating state detection unit 15 detects the operation content of the electric screwdriver 23 is measured, and this working time And the order of the work performed by the worker 31 can be stored as log data. Therefore, the work efficiency can be measured based on the log data, the work guidance device can be improved, and the ability of the worker can be increased.

  In addition, for a plurality of work instruction information in the same order in which the work contents are the same and the work positions are different, a plurality of positions that are work positions can be simultaneously irradiated with spot light by the assembly position spot light irradiation unit 14, and The worker 31 can work freely without worrying about the order of work. In addition, regardless of the order of the work performed by the worker 31, the work guidance control unit 13 determines that all the work instructed by the plurality of work instruction information has been normally completed, so that the work completion determination can be performed. it can. Accordingly, the worker 31 can be given a degree of freedom with respect to the work order, and the ability of the worker 31 can be drawn.

  In this case, since the order of the work performed by the worker 31 can be recorded as log data together with the information of the worker 31 and the work time, the work with the shortest work time can be performed on the same model based on the log data. The work guidance information can be automatically corrected based on the extracted work order. Therefore, a learning function for automatically improving the work guidance device can be provided.

  In the work guidance device according to the present embodiment, the work stage 21 is fixed. However, the work stage 21 may be movable by using an automatic transfer device such as a belt conveyor as the work stage 21. . In this case, even if the work stage 21 moves, the assembly position spot light irradiation unit 14, the power tool operating state detection unit 15, the weight measurement unit 16, or the component tray spot light irradiation follows the movement. Each part has a mechanism that functions correctly. For example, all the components constituting the work guidance device are fixed to the work stage 21 so as to be movable together with the work stage 21. Alternatively, when the assembly position spot light irradiation unit 14, the power tool operating state detection unit 15, the weight measurement unit 16, or the component tray spot light irradiation unit is installed independently from the work stage 21, the work stage 21 is moved. In accordance with, the reference position of the position coordinate in each of these parts may be corrected. By doing in this way, it can respond flexibly to a production system.

  In the work guidance device according to the present embodiment, the assembly position spot light irradiation unit 14 employs a mechanism for moving the spot light irradiation unit 14a by the position designation unit 14b, but generates spot light. You may make it irradiate a spot light to a predetermined place by reflecting or refracting spotlight itself using a reflecting plate, a beam splitter, or both, without moving a part. For example, the spot light is reflected by the reflection plate and tilted based on the work position information instructed by the work instruction information of the work guidance information with the X axis and the Y axis of the reflection plate as axes. Irradiate spot light to Alternatively, the spot light can be divided into a plurality of spot lights by a beam splitter, and each spot light can be reflected by an independent reflecting plate so that a plurality of spots can be irradiated simultaneously.

  In the work guidance device according to the present embodiment, the component tray spot that irradiates the component tray with spot light in order to show the component tray that stores the components and screws used for the assembly to the assembly target product 22. Although the light irradiation unit is used, instead of this, a part location voice guidance device that guides the part location by voice may be used. This is because the assembly location spot light irradiating unit 14 irradiates the location of the parts such as the component tray indicated by the work instruction information of the work guidance information before or almost simultaneously with the spot irradiation of the spot light. This is what happens.

  In the work guidance device according to the present embodiment, the power tool operating state detection unit 15 detects the position of the electric driver 23 using the spot light emitting unit 15a and the spot light receiving unit 15b. However, instead of this, the following mechanism may be adopted. That is, by reversely using the same mechanism as the X-axis / Y-axis positioning device used by the position specifying unit 14b of the assembly position spot light irradiation unit 14, the X-axis and Y-axis directions from the reference point A device for recognizing the position by detecting the movement distance is used. The electric screwdriver 23 is fixed to the device, and the position of the electric screwdriver 23 is recognized by following the movement of the electric screwdriver 23.

  In the work guidance device according to the present embodiment, one type of electric screwdriver 23 is used. However, a plurality of types of electric screwdrivers having different rotational speeds and tightening torques may be used. In this case, the type of the electric screwdriver is specified in the work instruction information of the work guidance information by the type and code number, and the type and code number for identification are given to the electric screwdriver installed on the work stage 21. Then, when using the electric screwdriver, this type and code number are transmitted to the work guidance control unit 13 to check whether the electric screwdriver used matches the electric screwdriver specified in the work instruction information. If this is the case, display a “tool difference” warning. This warning may be used in combination with not only display but also speech. In addition, by specifying the torque-up value of the electric screwdriver 23 in the work instruction information of the work guidance information and checking whether it matches the torque-up value of the used electric screwdriver, the proper electric screwdriver is used. It may be determined whether or not it has been done. Further, the electric tool is not limited to the electric screwdriver, and an electric tool other than the electric screwdriver can also be used.

It is the block diagram which showed the structure of the work guidance apparatus of this invention. It is an external view of the work guidance apparatus in this Embodiment. It is explanatory drawing which showed the structure of the work guidance apparatus in this Embodiment. It is the table which showed the example of the work instruction information used for the work guidance apparatus in this Embodiment. It is the flowchart which showed operation | movement of the work guidance apparatus in this Embodiment. It is the table which showed the example of the log data of the work guidance apparatus in this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work guidance information storage means 2 Model information reading means 3 Control means 4 Spot light irradiation means 5 Electric tool operation state detection means 6 Weight measuring means 11 Work guidance information database 12 Model information reading part 13 Work guidance control part 14 Assembly position Spot light irradiation unit 14a Spot light irradiation unit 14b Position designation unit 15 Power tool operating state detection unit 15a Spot light emission unit 15b Spot light reception unit 15c Torque up detection unit 16 Weight measurement unit 21 Work stage 22 Assembly target product 23 Electric driver 24 support part 31 worker

Claims (17)

A work guidance device for guiding a work on a single work object placed on a work stage or the work object with a jig,
Work guidance information storage means for storing work guidance information for each model of the work object;
Model information reading means for reading model information provided in the work object or the jig;
Control means for extracting work guidance information of the model read by the model information reading means from the work guidance information storage means, and for extracting work instruction information from the work guidance information according to the order instructed in the work guidance information;
Based on the work position information in the work instruction information provided by the control means, spot light irradiating means for irradiating spot light to the work position on the work object and notifying the worker of the work position;
A power tool operating state detecting means for detecting the position of the power tool in the work performed by the worker using the power tool and detecting the operation content of the power tool;
And a weight measuring means for measuring the weight of the work object after the work is completed,
The control means matches the position of the power tool detected by the power tool operating state detecting means with the position indicated by the work position information, and the operation content of the power tool detected by the power tool operating state detecting means is the If the operation content in the work instruction information matches the operation content in the work instruction information, and the weight of the work object after the work measured by the weight measuring means matches the weight in the work instruction information, the work instructed by the work instruction information An operation guidance device for performing an operation end determination for determining that the operation is normally completed.   The work guidance device according to claim 1, wherein the work stage is movable.   The mechanism information reading unit, the spot light irradiation unit, the power tool operating state detection unit, and the weight measurement unit each have a mechanism that functions accurately when the work stage moves. Work guidance device.   Prior to, or substantially simultaneously with, spot light irradiation by the spot light irradiating means, based on the part location information in the work instruction information provided by the control means, the part location informing the operator of the part location The work guidance device according to any one of claims 1 to 3, further comprising a place notification unit.   5. The part location location voice notification unit that guides the part location location by voice or the part location location spot light irradiation unit that irradiates spot light to the part location location as the part location location notification unit. The work guidance device described.   The work guidance device according to claim 4 or 5, wherein the work stage is movable.   The work guidance apparatus according to claim 6, comprising a mechanism in which the parts location reporting means functions accurately when the work stage moves.   8. The spot light irradiation unit according to claim 1, wherein the spot light irradiation unit performs point irradiation at a plurality of locations simultaneously by dispersing the spot light using a reflector, a beam splitter, or both. Work guidance device. With worker information input means for inputting the worker information,
The control means measures the working time from the point when the spot light irradiating means irradiates the spot light to the point when the power tool operating state detecting means detects the operation content of the power tool, The work guidance device according to any one of claims 1 to 8, wherein the work guidance information storage unit stores the information as log data together with the above information. For the plurality of work instruction information in the same order with the same work content and different work positions,
The spot light irradiation means simultaneously irradiates a plurality of locations as the work position,
The said control means performs the said work completion judgment, if it judges that all the work instruct | indicated by the said several work instruction information was completed normally irrespective of the order of the work which the said operator performed. The work guidance device according to any one of the above. With worker information input means for inputting the worker information,
The control means measures the working time from the time when the spot light irradiating means irradiates the spot light at a point to the time when the power tool operating state detecting means detects the operation content of the power tool. The work guidance device according to claim 10, wherein the work order performed by the worker is stored in the work guidance information storage unit as log data together with the information of the worker.   The control means extracts the work order with the shortest work time from the work time for each of the plurality of workers stored in the work guidance information storage means as the log data and the work order performed by the workers. The work guidance apparatus according to claim 11, wherein the work guidance information is corrected based on the extracted work order.   The work guidance device according to any one of claims 1 to 12, wherein a computer is used as the control means, and a storage device of the computer is used as the work guidance information storage means.   14. The work guidance apparatus according to claim 13, wherein a storage medium such as an FD, MD, MO, CD, DVD, memory card, or RFID is used as the work guidance information storage means in place of the storage device of the computer. The work guidance method for the work object using a database consisting of work guidance information for each model of a single work object placed on a work stage or the work object with a jig. And
Model information reading step for reading model information provided in the work object or the jig,
Extracting the work guidance information of the model read in the model information reading step from the database, and extracting the work instruction information from the work guidance information according to the order instructed in the work guidance information; and
Based on the part location information in the work instruction information, a part location notification process for notifying the worker of the part location;
Based on the work position information in the work instruction information, a spot light irradiation step of spot-irradiating a spot light to the work position on the work object, and notifying the worker of the work position;
An electric tool operation state detection step of detecting the position of the electric tool in the operation and detecting the operation content of the electric tool when the operator performs the operation using the electric tool;
A weight measuring step for measuring the weight of the work object after the completion of the work;
The position of the power tool detected in the power tool position detection step matches the position indicated by the work position information, and the operation content of the power tool detected in the power tool operation detection step is within the work instruction information. If the weight of the work target after completion of the work measured in the weight measurement process matches the weight in the work instruction information, the work instructed by the work instruction information is completed normally. A work guidance method comprising: a work completion judgment step for performing a work completion judgment to judge that the work has been completed. Prior to the model information reading step, an operator information input step is provided. From the spot light irradiation step to the power tool operating state detection step, a work time measurement step is provided in parallel with these, and the work is completed. A log data recording step is provided after the judgment step,
As the work instruction information, when there are a plurality of the work instruction information in the same order with the same work content and different work positions,
In the worker information input step, input the worker information,
In the spot light irradiation step, point irradiation is simultaneously performed on a plurality of locations that are the work positions,
In the work time measurement step, measure the work time from the point of spot light irradiation in the spot light irradiation step to the point in time when the operation details of the electric tool in the electric tool operation state detection step are detected,
In the work end determination step, regardless of the order of the work performed by the worker in the power tool operation state detection step, if it is determined that all the work specified by the plurality of work instruction information has been normally completed, Make a work end decision,
In the log data recording step, the work time measured in the work time measurement step and the order of the work performed by the worker in the power tool operating state detection step are recorded as log data together with the worker information. The work guidance method according to claim 15, wherein the work guidance method is recorded in the database. A work guidance information correction step is provided after the log data recording step,
In the work guidance information correction step, the work order with the shortest work time is extracted from the work time for each of the plurality of workers stored in the database as the log data and the work order performed by the workers. The work guidance method according to claim 16, wherein the work guidance information is corrected based on the extracted work order.

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