JP6320108B2 - Device that assists workers who perform visual inspection of defective products - Google Patents

Description

  The technique disclosed here relates to a technique for assisting an operator who performs a visual inspection of defective products.

  Usually, in a production line for industrial products (for example, a component mounting board in which an electronic component is mounted on a circuit board), it is inevitable that a product or a semi-product including a production defect is generated. Therefore, one or a plurality of inspection devices are arranged in the industrial product production line, and the generated defective product is extracted. In the present specification, a product or a semi-finished product including a production defect is generally referred to as a defective product.

  Here, not all defective products extracted from the production line are immediately discarded. For example, if a defect occurring in a defective product can be corrected, the defective product (strictly, it is no longer a defective product) can be reintroduced into the production line after the correction work by the operator. . Alternatively, a product that is actually normal may be erroneously extracted as a defective product. In such a case, the product can be immediately re-entered into the production line. Therefore, in an industrial product production line, a visual inspection by an operator is performed on a defective product generated on the production line in order to confirm the presence or absence and degree of the defect.

  Patent Document 1 discloses an apparatus that supports an operator who performs a visual inspection of defective products. This apparatus includes a stage on which a defective product is arranged, and a support device that irradiates the defective product arranged on the stage with a laser. The pointing device adjusts the laser irradiation direction based on the position information of the defective part acquired from the appearance inspection device. Thereby, the laser is irradiated to the defective part on the defective product, and the operator who performs the visual inspection of the defective product can easily know the position of the defective part.

Japanese Patent Application Laid-Open No. H8-222001

  In the apparatus described in Patent Document 1, an operator needs to place a defective product on the stage. With such a configuration, the worker touches the defective product, so there is a concern about the influence on the quality of the defective product. As described above, defective products generated in the production line are not all discarded, and many products are reintroduced into the production line. Therefore, there is a need for a technique that allows an operator to easily perform a visual inspection without affecting the quality of defective products.

  The present specification discloses a new and useful technique that can assist workers performing visual inspection of defective products to solve the above and other problems.

  The technology disclosed in the present specification is embodied in a support device that supports a worker who performs a visual inspection of defective products generated in an industrial product production line. This support device has at least one defined in the visual area for conveying means that conveys defective products generated on the production line to a visual area where the worker conducts visual inspection and the worker who performs visual inspection. The first display means for displaying two reference positions so as to be visible at the same time as the defective product arranged in the viewing area, and the position of the defective part of the defective product arranged in the viewing area for the operator who performs the visual inspection Is displayed using the reference position displayed by the first display means.

  According to the above-described support device, the operator refers to the display by the second display unit, and then uses the reference position displayed by the first display unit as a guideline, from the defective product placed in the viewing area, the defective part. Can be easily identified.

  The technology disclosed in the present specification is also embodied in other support apparatuses described below. This support device has at least one defined in the visual area for conveying means that conveys defective products generated on the production line to a visual area where the worker conducts visual inspection and the worker who performs visual inspection. First reference means for displaying the two reference positions so as to be visible simultaneously with the defective product arranged in the viewing area. Then, the transport unit stops the defective product in the viewing area so that the defective part of the defective product has a predetermined positional relationship with respect to the reference position displayed by the first display unit. In this case, it is preferable that the conveying unit determines the stop position of the defective product in the viewing area based on the position of the defective portion in the defective product.

  According to the above-described support device, the operator can easily specify the position of the defective portion from the defective product placed in the viewing area, using the reference position displayed by the first display unit as a guide.

The figure which shows the production system of Example 1 typically. Sectional drawing in the II-II line of FIG. The figure when the circuit board arrange | positioned in a visual recognition area is visually observed through a cover member. The figure which shows the example of a display of a display. The figure which looked at the magnifier from the side. The figure which planarly viewed the magnifier. The figure which shows the example of a display of the display which further displays the position which should arrange | position a magnifier. The figure which shows the magnifier arrange | positioned on a cover member. The figure which shows the production system of Example 2 typically. The figure which shows the circuit board arrange | positioned in the viewing area by the production system of Example 2. FIG. FIG. 11 is a diagram illustrating a circuit board arranged in a viewing area in the production system of Example 2, and together with FIG. 10, illustrates how the stop position of the circuit board is changed according to the position of a defective portion in the circuit board. .

  In the support device according to the present technology, the first display unit displays at least one first reference line extending perpendicularly to the direction in which the transport unit transports the defective product as the at least one reference position. Is preferred. In this case, the first display means is not limited to a linear mark extending on the first reference line, and the first reference line is displayed by one or a plurality of marks (for example, an arrow-shaped mark) positioned on the first reference line. Can be displayed. Further, the first display means may display those marks by projection, light emission, and light shielding.

  In addition or alternatively, the first display means displays at least one second reference line extending in parallel with the direction in which the transport means transports the defective product, as the at least one reference position described above. Is preferred. In this case, similarly to the first reference line described above, the first display means may display the second reference line in various manners.

  As one embodiment of the present technology, it is preferable that the first display unit displays the at least one reference position on a cover member positioned above the defective product arranged in the viewing area. According to such a configuration, the operator can easily visually recognize the reference position and the defective product at the same time, and can easily identify the position of the defective portion.

  The above cover member is preferably a plate-like member formed of a transparent or translucent material. According to such a configuration, the operator can visually recognize the defective product through the cover member. For example, the viewing area may be covered with a cover member, and in this case, it is possible to prevent or suppress foreign matter and dirt from adhering to defective products arranged in the viewing area.

  The support device according to the present technology is preferably provided on the cover member, and further includes enlarged visual means for the operator to enlarge and observe the defective portion. In this case, it is preferable that the second display means further displays a position where the enlarged visual means is to be arranged, using the reference position displayed by the first display means. According to such a configuration, the operator can easily arrange the magnified visual means at the correct position when magnifying and observing the defective part of the defective product.

  In the support device according to the present technology, the second display unit is attached to the product image indicating the defective product or an equivalent thereof (the same product as the defective product or a model of the same), the product image, and the defective It is preferable to simultaneously display the defect display image indicating the position of the part and the reference display image indicating the reference position displayed by the first display means. According to such a configuration, the operator can easily identify the position of the defective part of the defective product intuitively and can easily specify the position.

  The support device according to the present technology can be suitably applied to a production line in which an electronic component is mounted on a circuit board to produce a component mounting board, but it should also be effectively applied to a production line for other industrial products. Can do.

  A production system according to an embodiment of the present technology will be described with reference to the drawings. The production system of the present embodiment is a production system for producing a component mounting board by mounting a plurality of electronic components on the circuit board 4. As shown in FIG. 1, the production system includes a production line 10 and a visual inspection device 30 arranged on the production line 10. The production line 10 includes a line conveyor 20 that conveys the circuit board 4, and a solder printing device 12, a component mounting device 14, an inspection device 16, and a reflow device 18 that are arranged along the line conveyor 20. The solder printing apparatus 12 prints solder on the circuit board 4, and the component mounting apparatus 14 mounts a plurality of electronic components on the circuit board 4 printed with solder. The visual inspection device 30 is arranged on the downstream side of the inspection device 16 with respect to the flow direction of the circuit board 4 in the production line 10.

  The inspection device 16 performs an inspection on the circuit board 4 and determines whether or not the circuit board 4 is a defective product. The inspection by the inspection device 16 includes a plurality of inspection items. Examples of the plurality of inspection items include items such as presence / absence of electronic components, position and orientation, and appropriateness of solder amount. Although it is an example, the inspection apparatus 16 in the present embodiment images the circuit board 4 and analyzes the image of the circuit board 4 to determine pass / fail of each inspection item. When at least one inspection item is defective, the circuit board 4 is determined as a defective product. Note that specific inspection items are not particularly limited, and various inspection items may be included. The circuit board 4 that has passed the inspection passes through the visual inspection device 30 and is sent to the reflow device 18. The reflow device 18 heats the circuit board 4 to reflow the solder on the circuit board 4. Note that the configuration of the production line 10 can be variously changed and is not limited to the configuration described in the present embodiment.

  The visual inspection device 30 is a device that supports the worker 2 who visually inspects a defective product generated on the production line 10. As shown in FIGS. 1 and 2, the visual inspection device 30 includes a transport device 32, a cover member 34, and a display 36. The conveyance device 32 conveys the circuit board 4 determined as a defective product by the inspection device 16 to the visual area V where the operator 2 performs visual inspection. In addition, the specific structure of the conveying apparatus 32 is not specifically limited. Although it is an example, the conveying apparatus 32 in a present Example is comprised so that the belt conveyor which comprises a part of line conveyor 20 may move perpendicularly | vertically with respect to the conveyance direction of the line conveyor 20. FIG. That is, the transport device 32 can transport the circuit board 4 along the production line 10 and can also eject the circuit board 4 from the production line 10 and transport it to the visual area V. Further, the transfer device 32 can transfer the circuit board 4 from the visual area V to the production line 10 and re-insert the circuit board 4 into the production line 10.

  When the transport device 32 transports the circuit board 4 to the visual area V, the operator 2 performs a visual inspection on the circuit board 4 to confirm the presence or absence and degree of defects. As a result of the visual inspection, for example, it may be determined that there is no defect in the circuit board 4. In this case, the operator 2 determines that an inspection error has occurred by the inspection device 16, operates the visual inspection device 30, and re-injects the circuit board 4 into the production line 10. On the other hand, when a defect actually occurs in the circuit board 4, the operator 2 takes out the circuit board 4 from the viewing area V and performs a correction operation on the defective portion or discards the circuit board 4.

  The cover member 34 is a member that covers the viewing area V, and is located above the circuit board 4 arranged in the viewing area V. The cover member 34 is configured to be openable and closable, and the operator 2 can take out the circuit board 4 from the viewing area V by opening the cover member 34. The cover member 34 is provided with a handle 34 a for the operator 2 to open and close the cover member 34. The cover member 34 is formed of a transparent (or translucent) material such as acrylic resin, nylon resin, or glass. Therefore, the operator 2 can perform a visual inspection of the circuit board 4 through the cover member 34 without opening the cover member 34. Thereby, it is possible to prevent foreign matters and dirt from adhering to the circuit board 4.

  As shown in FIG. 3, the cover member 34 is provided with a plurality of first reference lines 40 and a plurality of second reference lines 42. The first and second reference lines 40 and 42 display a plurality of reference positions determined in the viewing area V so as to be visible to the operator 2. The operator 2 can visually recognize the defective product 4 and the first and second reference lines 40 and 42 arranged in the viewing area V at the same time. The first reference line 40 extends perpendicularly and the second reference line 42 extends parallel to the direction in which the circuit board 4 (defective product) is conveyed by the conveying device 32. Further, identifiers “1” to “3” assigned to the respective first reference lines 40 and identifiers “A” to “D” assigned to the respective second reference lines 42 are attached to the cover member 34. Has been. Thereby, the worker 2 uses the reference positions displayed by the first and second reference lines 40 and 42 such as “2-B” for each part of the circuit board 4 arranged in the viewing area V. Can be identified.

  Here, the first reference line 40 of the present embodiment is a linear mark attached to the cover member 34, but the first reference line 40 is not limited to the linear mark, and one or a plurality of marks ( For example, an arrow mark may be used. Further, these marks are not limited to those fixed to the cover member 34 or other members, and may be displayed by projection, light emission, and light shielding. The same applies to the second reference line 42.

  As shown in FIG. 4, the display 36 displays various information to the worker 2. For example, on the display portion 60 of the display 36, the position of the defective portion 6 of the circuit board 4 arranged in the viewing area V is displayed using the reference positions by the first and second reference lines 40 and 42. For example, in the example illustrated in FIG. 4, the position of the defective portion 6 is displayed as “2-B”. In this case, the worker 2 is in front of the first reference line 40 of the identifier “2”, is behind the first reference line 40 of the identifier “3”, and is the first of the identifier “B”. It can be determined that the defective portion 6 is located in the range to the right of the second reference line 42 and to the left of the second reference line 42 of the identifier “C”. Thereby, the worker 2 can easily identify the position of the defective portion 6 by observing the circuit board 4 in the range. Here, the position of the defective portion 6 with respect to the reference position of the visual area V can be determined based on the position of the defective portion 6 in the circuit board 4 that can be acquired from the inspection device 16, for example.

  The display 36 further includes a product image 54 showing the circuit board 4, a defective display image 56 showing the position of the defective portion 6, and reference display images 50 and 52 showing the first and second reference lines 40 and 42. Are displayed at the same time. By these displays, the operator 2 can easily identify the position of the defective portion 6 of the circuit board 4 arranged in the viewing area V intuitively and can easily specify the position.

  As shown in FIGS. 5 and 6, the visual inspection device 30 may further include a magnifying glass 70 disposed on the cover member 34. The magnifier 70 has at least one lens 72, and the operator 2 can observe the circuit board 4 from the eyepiece 74 in an enlarged manner. In this case, as shown in FIG. 7, it is preferable that the position where the magnifying glass 70 is to be disposed is further displayed on the display 36 using the reference positions based on the first and second reference lines 40 and 42 ( (See display portion 80 in FIG. 7). According to such a configuration, the operator 2 can easily arrange the magnifying glass 70 at the correct position when magnifying and observing the defective portion 6 of the circuit board 4. Here, as shown in FIGS. 5 and 6, it is also effective to provide a mark 76 for alignment on the magnifying glass 70. As shown in FIG. 8, the worker 2 can accurately place the magnifying glass 70 with respect to the reference position (for example, “C-2”) displayed on the display 36. Further, the magnifying mirror 70 may be provided with a light source for illuminating the circuit board 4.

  With reference to FIGS. 9-11, the 2nd production system which is an Example of this technique is demonstrated. In the production system of the present embodiment, the configuration of the visual inspection apparatus 130 is changed as compared with the production system described in the first embodiment. Other configurations are the same as those in the first embodiment, and therefore, redundant description is avoided here.

  As shown in FIG. 9, the visual inspection device 130 according to the present embodiment includes a transport device 132 and a projector 140. The conveyance device 132 conveys the circuit board 4 determined as a defective product by the inspection device 16 to the visual area V where the operator 2 performs visual inspection. The basic configuration of the transport device 132 is the same as that of the transport device 32 of the first embodiment. However, here, the transport device 132 of the present embodiment is configured by using, for example, a servo motor, and the stop position of the circuit board 4 in the viewing area V can be changed. The projector 140 projects a bright line 140a on the viewing area V. The bright line 140a is perpendicular to the direction in which the transport device 132 transports the circuit board 4 (defective product) and indicates one reference position defined in the viewing area V. The bright line 140a is also projected on the circuit board 4 arranged in the viewing area V, and the operator can view the circuit board 4 and the bright line 140a at the same time.

  Specifically, as shown in FIGS. 10 and 11, the transfer device 132 changes the stop position of the circuit board 4 in the viewing area V according to the position of the defective portion 6 in the circuit board 4. Accordingly, the transport device 132 causes the defective portion 6 of the circuit board 4 to match the reference position (that is, the bright line 140a) displayed by the projector 140 regardless of the position of the defective portion 6 in the circuit board 4. Then, the circuit board 4 can be stopped. Therefore, the worker 2 can easily identify the defective portion 6 from the circuit board 4 arranged in the viewing area V, using the bright line 140a displayed by the projector 140 as a guide. Here, the position of the defective part 6 in the circuit board 4 can be acquired from, for example, the inspection apparatus 16, and the transfer apparatus 132 determines the stop position of the circuit board 4 in the viewing area V based on the position information. can do.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  For example, in the visual inspection apparatus 30 according to the first embodiment, it is sufficient that at least one reference position is defined in the work area. In this case, the cover member 34 also includes at least one reference line 40, 42 (or other It only needs to be marked. Further, the at least one reference line 40, 42 is not limited to the cover member 34, but may be attached to the frame of the visual inspection device 30 or other members.

  Further, the transport device 132 in the second embodiment can also be suitably applied to the visual inspection device 30 in the first embodiment. In other words, the transfer device 32 in the first embodiment changes the stop position of the circuit board 4 in the viewing area V according to the position of the defective portion 6 in the circuit board 4, similarly to the transfer device 132 in the second embodiment. It may be a thing.

  The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

2: Worker 4: Circuit board 6: Defect site 10: Production line 16: Inspection device 20: Line conveyor 30, 130: Visual inspection device 32, 132: Transport device 34: Cover member 36: Display 40: First reference line 42: second reference line 70: magnifying glass 130: visual inspection device 140: projector

Claims (9)

A support device for supporting an operator who performs a visual inspection of defective products generated in an industrial product production line,
Conveying means for conveying defective products generated in the production line to a visual area where an operator performs visual inspection;
A first display means for displaying at least one reference position defined in the viewing area at the same time as a defective product arranged in the viewing area for an operator who performs the visual inspection;
Second display means for displaying the position of the defective part of the defective product arranged in the visual area using the reference position displayed by the first display means for the operator who performs the visual inspection;
A support device comprising:   2. The support according to claim 1, wherein the first display unit displays, as the at least one reference position, at least one first reference line extending perpendicularly to a direction in which the transport unit transports a defective product. apparatus.   The said 1st display means displays the at least 1 2nd reference line extended in parallel with the direction in which the said conveyance means conveys a defective product as said at least 1 reference position. Support device.   The support according to any one of claims 1 to 3, wherein the first display means displays the at least one reference position on a cover member located above the defective product arranged in the viewing area. apparatus.   The support device according to claim 4, wherein the cover member is a plate-like member formed of a transparent or translucent material. Further disposed on the cover member, further comprising an enlarged visual means for an operator to enlarge and observe the defective part,
6. The support apparatus according to claim 5, wherein the second display means further displays a position where the enlarged visual means is to be arranged using a reference position displayed by the first display means.   The second display means simultaneously displays a product image indicating the defective product or an equivalent thereof, a defect display image indicating the defective portion, and a reference display image indicating a reference position displayed by the first display means. The support device according to any one of claims 1 to 6.   The conveyance means stops the defective product in the viewing area so that a defective portion of the defective product has a predetermined positional relationship with respect to a reference position displayed by the first display means. The support device according to any one of 7.   The support device according to claim 8, wherein the transport unit determines a stop position of the defective product in the viewing area based on a position of the defective part in the defective product.

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