JP6188620B2 - Inspection device and PTP packaging machine - Google Patents

Description

  The present invention belongs to a technical field including an inspection apparatus used in manufacturing a PTP sheet and a PTP packaging machine provided with the inspection apparatus.

  For example, a PTP sheet used in the field of pharmaceuticals and foods is a container film in which a pocket part filled with contents such as tablets is formed, and is attached so that the opening side of the pocket part is sealed against the container film. Cover film.

  In the manufacturing process of PTP sheets, after the pockets are filled with tablets, etc. (before or after the cover film is attached) Inspection for abnormal appearance is performed.

  In such an inspection, a PTP sheet is generally imaged by an imaging means, and a tablet abnormality or sheet abnormality is detected based on the imaged image data. Then, the PTP sheet determined to be abnormal is discharged as a defective product.

  However, in the fields of pharmaceuticals, foods, and the like, stricter inspections are performed. Therefore, PTP sheets that are determined to be defective in the inspection may include PTP sheets that should be handled as non-defective products.

  On the other hand, conventionally, a technique for storing image data determined to be defective in the inspection together with the inspection condition and the inspection result so that the inspection can be reproduced is also known (see, for example, Patent Document 1). ). As a result, for example, whether or not a defect is actually determined due to an abnormality such as a missing chip (whether it is a true defect), or whether or not the inspection condition such as a determination value is not valid, and is determined to be defective. It can be determined whether or not the inspection is normally performed.

JP 2006-214814 A

  However, when trying to verify the validity of an arbitrary determination value or the like under the above-described configuration, the worker makes one PTP sheet (image data) determined to be defective for each arbitrary determination value or the like one by one. It is necessary to verify individually. Therefore, when there are many PTP sheets determined to be defective, a huge amount of work time is required.

  The present invention has been made in view of the above circumstances, and is one of the main objects to provide an inspection apparatus and a PTP packaging machine that can improve convenience, such as facilitating verification work of inspection conditions. It is said.

  Hereinafter, each means suitable for solving the above-described problem will be described separately. In addition, the effect specific to the means to respond | corresponds as needed is added.

Means 1. An inspection apparatus used in the manufacture of a PTP sheet in which contents are stored in a pocket portion formed in a belt-shaped container film to be transported, and a cover film is attached so as to close the pocket portion,
Irradiating means for irradiating the container film containing the contents with predetermined light;
Imaging means capable of imaging the contents irradiated with the light and the container film;
An inspection unit that performs an inspection related to a predetermined inspection object based on image data obtained from the imaging unit and a predetermined inspection condition (determination value or the like);
When a defect is determined by the inspection means, the image data and the related information (position information of the inspection object) related to the inspection object determined to be defective, and the inspection result (defective inspection item or pass / fail) by the inspection means. Determination results, etc.) in association with each other, and after completion of the inspection by the inspection means, in association with these, the pass / fail confirmation results (eg, pass / fail determination results by visual inspection) by the operator regarding the inspection object determined to be defective Storage means capable of storing
Change means capable of changing the inspection condition based on information stored in the storage means (e.g., a result of pass / fail confirmation by an operator);
Re-inspection means for executing re-inspection (simulation of inspection) on the inspection object based on the image data stored in the storage means and the changed inspection condition, and performing pass / fail determination of the inspection object ; An inspection apparatus comprising: a display means for displaying the result of the inspection by the inspection means, the result of checking the quality by the operator, and the result of the re-inspection by the re-inspection means in a comparable manner.

  According to the means 1, when a defect is determined in the inspection, the image data related to the inspection object determined to be defective and the inspection result by the inspection means are stored in the storage means. After the series of inspections, the inspection object determined to be defective is visually inspected by an operator, and the quality check result is stored in the storage means in association with the image data. Thus, the inspection condition can be reviewed while comparing the inspection result by the inspection means with the pass / fail confirmation result by the operator.

  Specifically, the inspection condition is changed, and the reinspection is executed based on the changed inspection condition and the image data stored in the storage unit. Then, the suitability of the changed inspection conditions can be verified by comparing the inspection result by the re-inspection means with the pass / fail confirmation result by the operator. Thus, for example, if all inspection objects that have been determined to be defective by visual inspection or the like of the operator are included in the inspection objects that have been determined to be defective by re-inspection, the inspection conditions after the change are appropriate. I can grasp it.

  As described above, by storing the result of the quality check by the operator in the storage unit in association with the image data or the like, it becomes easy to verify the suitability of the inspection conditions after the change for all the inspection targets determined to be defective. As a result, it is possible to facilitate the verification of inspection conditions.

  As a result, it becomes easier to find an appropriate determination value or the like that can reduce the non-defective product error rate (probability that a non-defective product is erroneously determined as a defective product), and the inspection accuracy in subsequent inspections can be improved.

  Further, this means is configured to store only the image data relating to the inspection object determined to be defective in the inspection, and not to store the image data determined to be non-defective. For this reason, compared with the structure which memorize | stores all the image data used for a test | inspection, the information amount memorize | stored in a memory | storage means can be reduced and the increase in the data capacity in a memory | storage means can be prevented.

  Mean 2. In consideration of the information stored in the storage means (e.g. the result of acceptance / rejection confirmation by the operator), there is provided a change condition calculation means for calculating an arbitrary inspection condition (determination value etc.) to be changed by the change means. The inspection apparatus according to claim 1, characterized by:

  According to the above-described means 2, it is possible to more easily set an appropriate inspection condition corresponding to the quality confirmation result by the operator. Thus, for example, the operator can automatically perform re-inspection with a single button operation without manually inputting inspection conditions manually. As a result, it is possible to improve workability in the inspection condition verification work.

  Means 3. The re-inspection means includes predetermined image data (image data used for validation work or past inspections performed in other lots) stored in the storage means in advance before execution of the inspection by the inspection means. 3. The inspection apparatus according to claim 1 or 2, wherein the re-inspection is also performed on stored image data and the like.

  According to the means 3, it is possible to determine whether or not the changed inspection condition is appropriate not only for inspection relating to a predetermined lot but also for inspection relating to other lots. Thereby, the further verification can be performed about the validity of inspection conditions. As a result, the inspection accuracy in the subsequent inspection can be further improved.

Means 4 . A PTP packaging machine comprising the inspection device according to any one of means 1 to 3 .

By providing the inspection apparatus in the PTP packaging machine as in the above means 4 , there is a merit that defective products can be efficiently excluded in the manufacturing process of the PTP sheet.

  In general, the PTP packaging machine includes a pocket forming means for forming a pocket portion for a container film conveyed in a strip shape, a filling means for filling the pocket portion with contents, and the container so as to close the pocket portion. Attachment means for attaching a belt-like cover film to the film, and sheet punching means for punching the belt-like PTP film with the cover film attached to the container film in units of PTP sheets. In addition, the PTP packaging machine includes a discharge unit that discharges the PTP sheet that has been determined to be defective by the inspection apparatus.

(A) is a perspective view which shows a PTP sheet, (b) is a perspective view which shows a PTP film, (c) is a partial expanded sectional view which shows a PTP sheet. It is a schematic diagram which shows schematic structure of a PTP packaging machine. It is a block diagram which shows the electric constitution of a test | inspection apparatus. It is a flowchart which shows an inspection process. It is explanatory drawing which illustrated the screen display content at the time of an inspection process execution. It is a flowchart which shows an information display process. It is explanatory drawing which illustrated the screen display content at the time of defective item selection. It is a flowchart which shows a reexamination process. It is explanatory drawing which illustrated the content of the check screen. (A), (b) is explanatory drawing which illustrated the content of the judgment value input screen. It is explanatory drawing which illustrated the screen display content at the time of reexamination processing execution.

  Hereinafter, an embodiment will be described with reference to the drawings. First, the PTP sheet to be inspected will be described in detail.

  As shown in FIGS. 1A to 1C, the PTP sheet 1 includes a container film 3 having a plurality of pocket portions 2 and a cover film attached to the container film 3 so as to close the pocket portions 2. 4.

  The container film 3 is made of, for example, a transparent or translucent thermoplastic resin material that is relatively hard and has a predetermined rigidity, such as PP (polypropylene) or PVC (polyvinyl chloride). The cover film 4 is made of aluminum.

  The PTP sheet 1 is formed in a substantially rectangular shape in a plan view, and two pocket rows composed of five pocket portions 2 arranged along the longitudinal direction of the sheet are formed in the lateral direction of the sheet. That is, a total of 10 pocket portions 2 are formed. Each pocket 2 contains one tablet 5 [see FIG. 1 (c)].

  The PTP sheet 1 is manufactured into a sheet shape by punching a strip-shaped PTP film 6 (see FIG. 1B) formed from the strip-shaped container film 3 and the cover film 4.

  Next, an outline of the PTP packaging machine 11 for manufacturing the PTP sheet 1 will be described with reference to FIG.

  On the uppermost stream side of the PTP wrapping machine 11, an original fabric of the container film 3 wound in a roll shape is arranged (not shown). The container film 3 is intermittently conveyed from here. In the PTP packaging machine 11, first, a heating device 14 and a pocket forming device 15 are sequentially arranged along the conveyance path of the container film 3. The heating device 14 and the pocket forming device 15 are for forming the pocket portion 2 on the container film 3 and constitute pocket forming means in the present embodiment.

  The PTP packaging machine 11 is provided with a tablet loading device 16 and a film receiving roll 17 in this order along the transfer path of the container film 3 in which the pocket portion 2 is formed. The tablet loading device 16 is for filling the tablet 5 in each pocket portion 2 of the container film 3, and constitutes a filling means in this embodiment.

  Further, a first inspection device 21 is provided between the tablet loading device 16 and the film receiving roll 17. The first inspection device 21 is a transmission type inspection device that inspects abnormality relating to the tablet 5 and abnormality relating to the container film 3 (sheet portion) from the opening side of the pocket portion 2. A more detailed configuration of the first inspection apparatus 21 will be described later.

  For example, the first inspection device 21 determines whether or not the tablets 5 are reliably filled in the pockets 2, cracks or chipping of the tablets 5, mixing of different types of tablets different from the tablets 5 (shape, etc.), foreign matter Inspection is performed to detect the adhesion of the material.

  On the other hand, the original drawing end of the cover film 4 wound in a roll shape is guided toward the film receiving roll 17. A heating roll 18 can be press-contacted to the film receiving roll 17, and the cover film 4 is attached to the container film 3 by passing between the rolls 17 and 18 in a heated-pressing state. Yes. Thereby, the PTP film 6 with which the tablet 5 was filled in each pocket part 2 is manufactured. Therefore, the film receiving roll 17 and the heating roll 18 constitute the attachment means in this embodiment.

  Further, a second inspection device 22 is provided in the transfer path of the PTP film 6 on the downstream side of the film receiving roll 17 in correspondence with the front side of the PTP film 6 (the protruding surface side of the pocket portion 2).

  The second inspection device 22 is a reflective inspection device that inspects abnormalities related to the tablet 5 and abnormalities related to the PTP film 6 (sheet portion) from the protruding portion side of the pocket portion 2. Therefore, in combination with the inspection by the first inspection device 21, it is possible to perform inspection from both the front and back sides of the container film 3 (PTP film 6). A more detailed configuration of the second inspection apparatus 22 will be described later.

  Similar to the first inspection device 21, in the second inspection device 22, for example, whether or not the tablets 5 are reliably filled in the pocket portions 2, whether the tablets 5 are cracked or chipped, Inspection is performed to detect mixing of different types of tablets having different shapes, adhesion of foreign matters, and the like. In particular, in the second inspection device 22, a color identification inspection for detecting color abnormality of the tablet 5 is performed when performing the mixing inspection of the different types of tablets.

  Thereafter, the PTP film 6 is punched in units of PTP sheets by a sheet punching unit (not shown). In the present embodiment, two PTP sheets 1 are simultaneously punched in the width direction of the PTP film 6. Thereby, the PTP sheet 1 which manufactured the conveyance direction of the PTP film 6 as the sheet transversal direction is manufactured.

  If the inspection devices 21 and 22 determine that a defect has occurred, a defective product signal is sent to a defective sheet discharge mechanism (not shown) as a discharge means. As a result, the PTP sheet 1 determined to be defective is separately discharged by the defective sheet discharging mechanism and transferred to a defective hopper (not shown).

  Now, the outline of the PTP packaging machine 11 is as described above. Hereinafter, a more specific configuration of the inspection devices 21 and 22 will be described with reference to FIG.

  Each of the inspection devices 21 and 22 includes an illumination device 25 as an irradiation unit, a camera 26 as an imaging unit, a processing execution unit 27, a display unit 28 as a display unit, and an input unit 29 as an input unit.

  The illuminating device 25 is provided on the protruding portion side of the pocket portion 2 of the container film 3 or the PTP film 6 and is configured to be able to irradiate infrared light.

  Further, in the first inspection device 21, the camera 26 is provided on the opening side of the pocket portion 2 of the container film 3 that is opposite to the lighting device 25 through the container film 3, and is irradiated from the lighting device 25. The light which permeate | transmitted the container film 3 among the light to illuminate is comprised.

  On the other hand, in the second inspection device 22, the camera 26 is provided on the protruding portion side of the pocket portion 2 of the PTP film 6 on the same side as the illumination device 25, and among the light irradiated from the illumination device 25, the PTP film 6 and the tablet 5 etc., it is the structure which images two-dimensionally the light reflected.

  In this embodiment, a CCD camera having sensitivity in the wavelength region of infrared light emitted from the illumination device 25 is employed as the camera 26. Not limited to this, a CMOS camera may be employed.

  The image data (luminance image data) captured by the camera 26 is converted into a digital signal inside the camera 26 and then input to the processing execution device 27 in the form of a digital signal.

  The display device 28 is for displaying various types of information, and is a display device using a CRT or a liquid crystal. In the present embodiment, the display device 28 displays defective images, inspection conditions, and the like as described later.

  The input device 29 is used to input various types of information, and includes a keyboard, a mouse as a pointing device, a touch panel integrated with the display device 28, and the like. The input device 29 constitutes changing means in the present embodiment.

  The processing execution device 27 is configured as a so-called computer system, and can execute various processes such as image processing.

  The processing execution device 27 includes an image memory 31, an inspection result and statistical data memory 32, a determination memory 33, an image / inspection condition storage device 34, a camera timing control device 35, and a CPU and an input / output interface 36. Various image processing such as binarization processing and block processing, defect determination processing (inspection processing), and the like can be performed.

  The image memory 31 stores two-dimensional image data (image data) of a captured image output from the camera 26. An inspection is executed based on the image data stored in the image memory 31. Of course, when the inspection is executed, the image data may be processed. For example, it is conceivable to perform processing such as masking processing or shading correction. In the shading correction, there is a technical limit to uniformly illuminate the entire imaging range of the container film 3 with the infrared light of the illuminating device 25, so that the variation in the brightness of the infrared light caused by the difference in position is corrected. belongs to. Note that binarized image data obtained by performing binarization processing on image data at the time of inspection, masking image data subjected to masking processing, and the like are also stored in the image memory 31.

  The inspection result and statistical data memory 32 stores data such as coordinates related to image data, appearance inspection result data, and statistical data obtained by probabilistically processing the appearance inspection result data. These appearance inspection result data and statistical data can be displayed on the display device 28 under the control of the CPU and the input / output interface 36. Further, the CPU and the input / output interface 36 can send a control signal to the PTP packaging machine 11 based on the appearance inspection result data and the statistical data.

  The determination memory 33 stores determination values (threshold values, etc.) used for inspection. The determination value is set for each inspection item. Among them, there are also determination values that are determined by statistically measuring inspection measurement results for items determined to be non-defective items in past inspections, such as determination values for inspecting tablet area values. Such a determination value changes according to the inspection measurement result during the inspection. The determination value referred to in the present embodiment includes a determination value that changes according to such an inspection result.

  The image / inspection condition storage device 34 constitutes storage means in the present embodiment, and is constituted by a hard disk device. In the image / inspection condition storage device 34, when it is determined to be defective by inspection, inspection items such as “unlocked” and “sheet foreign matter”, date and time of defect determination, image data, inspection conditions used for inspection, etc. Is memorized.

  The camera timing control device 35 controls the imaging timing of the camera 26. Such timing is controlled based on a signal from an encoder (not shown) provided in the PTP packaging machine 11, and imaging is performed by the camera 26 every time a predetermined amount of the container film 3 or the PTP film 6 is fed.

  The CPU and the input / output interface 36 constitute inspection means and re-inspection means in this embodiment, and control various controls in the inspection devices 21 and 22. For example, it has a function of executing various processing programs and sending a control signal to the PTP packaging machine 11 or receiving various signals such as operation signals from the PTP packaging machine 11. As a result, the defective sheet discharge mechanism of the PTP packaging machine 11 can be controlled. The CPU and input / output interface 36 has a function of sending display data to the display device 28, and can display inspection results and the like on the display device 28. Further, the CPU and the input / output interface 36 have a function of inputting information from the input device 29, and can change and set inspection conditions and the like.

  Next, the inspection process in the present embodiment will be described based on the flowchart of FIG. This process is executed by the CPU and input / output interface 36. In addition, although description is abbreviate | omitted, in the 2nd test | inspection apparatus 22, the same process is performed.

  First, in step S100, an inspection is executed. More specifically, based on the image data stored in the image memory 31, an abnormality or the like of the tablet 5 filled in the pocket portion 2 is inspected using a preset determination value [see FIG. 10 (a)]. To do.

  This inspection is performed for each pocket portion 2 in order to determine whether the PTP sheet 1 is good or bad. Therefore, for the inspection of each pocket portion 2, the sheet position and the sheet position follow-up amount for specifying the pocket portion 2 (the amount by which the movement of the sheet inspection frame is allowed to specify the sheet portion, for example) is used. It is done. In addition, the inspection result is stored in the inspection result and statistical data memory 32.

  In a succeeding step S110, it is determined whether or not a failure is determined. If it is determined that a defect has been determined (step S110: YES), the process proceeds to step S120. On the other hand, when the defect is not determined (step S110: NO), that is, when it is determined as a non-defective product, the following process is not executed and the present inspection process is terminated.

  In step S120, which is shifted to when a defect is determined, the date and time of occurrence of a defect and a defect item are stored. In the subsequent step S130, the image data when the defect is determined is stored. Here, the image data is stored in association with the defect occurrence date and time and the defect item.

  In the next step S140, the sheet position follow-up amount for specifying the pocket portion 2 corresponding to the defective tablet 5 is stored, and in step S150, the determination value is stored. Note that only determination values corresponding to defective items may be stored, or all determination values of each inspection item may be stored.

  In step S160, the defect item and defect occurrence time are displayed on the display device 28, and then the present inspection process is terminated. The defect occurrence date / time, defect item, image data, sheet position follow-up amount, and determination value are stored in the image / inspection condition storage device 34.

  Here, an example of the inspection result display displayed on the display screen of the display device 28 will be described with reference to FIG. FIG. 5 is an explanatory diagram illustrating the display screen of the display device 28 when the inspection process is executed.

  On the left side of the screen, the images g1 and g2 of the portion of the container film 3 to be inspected are displayed. In these images g1 and g2, illustration of the end of the container film 3 is omitted. Then, the inspection result is displayed on the right side of the images g1 and g2. The PTP sheet 1 in this embodiment has ten pocket portions 2 in sheet units [see FIG. 1 (a)]. Therefore, in the sheet unit inspection, the tablets 5 filled in the ten pocket portions 2 are inspected. In FIG. 5, the pocket portion 2 inside the frame line indicated by symbols A and B indicates what is currently inspected in the container film 3. That is, the frame lines A and B correspond to one PTP sheet 1 to be inspected. The images g1 and g2 shown here are updated as the inspection object changes. In FIG. 5, the images g1 and g2 are “back side” and “near side” because the two PTP sheets 1 are punched in the width direction of the container film 3 as described above. Yes (see FIG. 1 (b)). Therefore, the display of the inspection result is also divided into upper and lower parts such as the back side and the near side.

  As shown in FIG. 5, the display items of the inspection result are “all missing”, “missed tablet”, “tablet defect”, “processing defect”, “color defect”, “tape seam”, “sheet bulk foreign material”. , "Sheet foreign matter (lumps)" and "Sheet foreign matter (line)" inspection items, "No. of good products", "No. of defects", "Defect rate", "Total number of non-defective products", "Total number of defective products" It consists of statistical data called “defect rate” and defect occurrence information.

  First, the inspection items will be described. “All missing” indicates that the tablet 2 is not filled in the pocket portion 2 at all. “Missing tablet” indicates that any of the pockets 2 is not filled with the tablet 5. “Poor tablet” indicates that the tablet is chipped, cracked, abnormal in shape, or the like.

  “Processing failure” indicates that the execution of the inspection process is not in time for the transport speed of the PTP film 6, for example, when a large number of foreign objects are erroneously detected or the brightness of the image is too low. Can occur. “Color defect” indicates that the deviation of RGB luminance has increased. However, “color defect” is an item to be inspected only by the second inspection apparatus 22.

  Further, when there is no longer any original film wound in a roll shape, the end of the film and the start of a new film are connected with a tape, so that the seam portion is to be discharged. “Tape seam” indicates that this seam portion has been detected.

  “Sheet foreign matter” indicates that foreign matter is mixed. Among these, “sheet huge lump foreign matter” indicates that a large foreign matter of several mm (for example, 5 mm) or more has been detected, and can occur, for example, when a tool or the like is misplaced on the film. Further, “sheet foreign matter (lump)” indicates that a small foreign matter of less than several mm (for example, 5 mm) is detected, and may occur when, for example, tablet powder is detected. “Sheet foreign matter (line)” indicates that a linear foreign matter such as hair has been detected.

  The statistical data “number of non-defective products”, “number of defects” and “defect rate” are calculated for the back side and the near side, respectively, and in order, the total number of non-defective products, the total number of defective products, The ratio of the number of good products is shown. “Total number of non-defective products”, “Total number of defects” and “Total defect rate” are the total of the back side and the near side, and in order, the total number of non-defective products, the total number of defective products, and defective products against the total number The ratio of the number of.

  The defect occurrence information includes a defect occurrence time and a defect item, and is displayed on each of the back side and the near side. In the present embodiment, as shown in FIG. 5, for example, “14:34:00 bad tablet” (indicated by symbol C) or “14:31:30 missing tablet” (indicated by symbol D) is displayed. Made. As the defect occurrence information, a predetermined number (for example, 9) is displayed from the latest information, and past information is not displayed. This defect occurrence information is displayed in step S160 in FIG.

  Next, information display processing in the present embodiment will be described based on the flowchart of FIG. This process is executed by the CPU and input / output interface 36. Similar to the above-described inspection process, this process will be described using the first inspection apparatus 21 as an example.

  In first step S200, it is determined whether or not a failure item in the failure occurrence information being displayed has been selected. The defective item is selected via the input device 29. For example, information specifying a defective item can be selected by inputting from a keyboard, a defective item can be selected using a mouse, or an operator can touch a display screen to select a defective item using a touch panel. It is possible. When selecting with a mouse or a touch panel, the defective item itself may be selected, or the defective item may be selected by instructing a failure occurrence time displayed corresponding to the defective item.

  In step S210, which is shifted to when a defective item being displayed is selected, an image of the container film 3 stored in association with the defective item is displayed. In the subsequent step S220, the sheet position follow-up amount stored in association with the defective item is displayed. In the next step S230, the determination value stored in association with the defective item is displayed, and then this process is terminated. .

  An example of the inspection result display is shown in FIG. 5, and for example, information display when the item of tablet defect in the defect occurrence information indicated by the symbol C is selected will be described with reference to FIG. 7. FIG. 7 is an explanatory diagram illustrating the display screen of the display device 28 when defect occurrence information is selected.

  When an item of tablet defect in the defect occurrence information indicated by symbol C in FIG. 7 is selected (step S200 in FIG. 6: YES), for example, when an operator touches this item on the screen via a touch panel, The image g3 when the defect is determined is displayed together with the frame line indicated by the symbol E (step S210). Further, the sheet position follow-up amount when the defect is determined as indicated by symbol F is displayed below the defect occurrence information column, and the determination value is displayed as indicated by symbol G (step S220, step S220). S230).

  Next, the procedure of the reinspection process in the present embodiment will be described with reference to the flowchart of FIG. Similar to the above-described inspection process, this process will be described using the first inspection apparatus 21 as an example.

  First, in the first step S300, the operator confirms the pass / fail check result while visually checking the PTP sheet 1 that has been determined to be defective by the inspection process and discharged and the defective image displayed by the information display process. input.

  For example, in the present embodiment, a check screen W1 as shown in FIG. 9 is displayed together with the inspection result in the information display process, and the check column corresponding to “good image” or “defective image” on the check screen W1 is displayed. The operator checks.

  The pass / fail confirmation result input here is stored in the image / inspection condition storage device 34 in association with the image data determined to be defective in the above-described inspection processing. This process is performed for all PTP sheets 1 that are determined to be defective.

  Next, in step S310, the worker changes the inspection condition (determination value) in consideration of the defective item and the determination value displayed by the information display process, the quality check result (step S300), and the like.

  Here, the determination value (luminance threshold value) used in the inspection of the present embodiment will be described with reference to FIGS. 10A and 10B are explanatory diagrams illustrating the contents of the determination value input screen.

  For example, in the example shown in FIG. 10A, the luminance range of the lower limit “0” to the upper limit “70” is set for “tablet detection”, and is within the range of the luminance values “0” to “70”. Some are detected as “tablets”. The lowest limit (dark side) of the luminance value detected by the first inspection device 21 is “0”, and the highest limit (bright side) is “255”.

  For “sheet foreign matter (block) detection”, a luminance range of a lower limit “0” to an upper limit “180” is set, and those within the range of the luminance values “0” to “180” are “sheet foreign matter ( Detected as a lump).

  For “pocket detection”, a luminance range of a lower limit “70” to an upper limit “230” is set, and those within the range of the luminance values “70” to “230” are detected as “pocket portions”. .

  For “sheet foreign matter (linear) detection”, a luminance range of a lower limit “0” to an upper limit “225” is set, and those within the range of the luminance values “0” to “225” are “sheet foreign matter” (Linear) ”.

  In addition, a luminance value “60” is set for “sheet foreign matter (linear) differential detection”, and a luminance value “75” is set for “sheet foreign matter (linear) differential candidate detection”.

  In the determination value changing process in step S310, for example, each determination value is changed as shown in FIG.

  In the example of FIG. 10B, the upper limit for “tablet detection” is changed from the luminance value “70” to “80”. Thereby, a larger range can be detected as a tablet region.

  Also, the upper limit for “sheet foreign object (block) detection” is changed from the luminance value “180” to “160”, and the upper limit for “sheet foreign object (linear) detection” is changed from the luminance value “225” to “200”. In addition, the luminance value for “sheet foreign object (linear) differential detection” is changed from “60” to “80”, and the luminance value for “sheet foreign object (linear) differential candidate detection” is changed from “75” to “95”. Each has changed. As a result, fine scratches on the sheet are not detected as foreign matters.

  After completion of the determination value changing process in step S310, re-inspection is executed in step S320.

  More specifically, the image data stored in the image / inspection condition storage device 34 is re-inspected based on the inspection condition (determination value) changed in the determination value changing process. For example, when an automatic reinspection switch (not shown) displayed on the display screen (touch panel) of the display device 28 is pressed, reinspection is automatically performed on all the PTP sheets 1 determined to be defective in the current lot. Is called.

  Thereafter, the re-inspection result is displayed in step S330, and this process is terminated. Here, an example of the reexamination result display displayed on the display screen of the display device 28 will be described with reference to FIG. FIG. 11 is an explanatory diagram illustrating the display screen of the display device 28 when the re-inspection process is executed.

  In the example shown in FIG. 11, on the left side of the screen, correspondence between the defect inspection result (step S130) and the pass / fail confirmation result (step S300) stored in the image / inspection condition storage device 34, and the re-inspection result (step S330). A correspondence list W2 indicating the relationship is displayed. Further, on the right side of the list W2, the statistical data W3 related to the inspection process (step S100) and the statistical data W4 related to the reexamination (step S330) are displayed.

  The operator can verify the suitability of the changed inspection condition by comparing and referring to the correspondence list W2 and the statistical data W3 and W4. Here, for example, if all of the PTP sheets 1 that have been determined to be defective by re-inspection are determined to be defective by visual inspection or the like of the operator, the inspection conditions after the change are appropriate. I can grasp it. In the example of FIG. 11, when the changed inspection conditions are appropriate, 44 non-defective PTP sheets 1 are erroneously determined to be defective and discharged.

  A more appropriate inspection condition can be found by repeatedly performing the above processing (steps S310 to S330) while changing the inspection condition stepwise. As a result, it is possible to reduce the non-defective product error rate and improve the inspection accuracy in the subsequent inspection.

  As described above in detail, according to the present embodiment, all the PTP sheets 1 determined to be defective are changed by associating the result of acceptance / rejection confirmation by the operator with the image data or the like in the image / inspection condition storage device 34. It becomes easier to verify the suitability of subsequent inspection conditions. As a result, it is possible to facilitate the verification of inspection conditions.

  As a result, it becomes easy to find an appropriate judgment value or the like that can reduce the non-defective product error rate, and the inspection accuracy in the subsequent inspection can be improved.

  In the present embodiment, only the image data related to the PTP sheet 1 determined to be defective in the inspection is stored, and the non-defective product is not stored. Therefore, the amount of information stored in the image / inspection condition storage device 34 can be reduced compared to a configuration in which all image data used for inspection is stored, and the data capacity in the image / inspection condition storage device 34 can be increased. Can be prevented.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the case where the content is the tablet 5 is specified, but the type, shape, and the like of the content are not particularly limited. For example, food, electronic parts, and the like are used as the content. The structure filled may be sufficient.

  Of course, the shape, number, arrangement, size and the like of the pocket portions 2 formed corresponding to these contents are not limited to the above embodiment.

  (B) The contents of inspection items and inspection conditions are not limited to the above embodiment. For example, in the above-described embodiment, the quality of image data is determined using “luminance” as the inspection condition (determination value). However, the present invention is not limited to this, and the “peripheral length (length)” and “missing” of the tablet 5 It is good also as a structure which calculates | requires the quality determination based on this.

  (C) Although not specifically mentioned in the above embodiment, when the determination value changing process (step S310) of the reinspection process is performed, the change condition calculation is performed in consideration of the information stored in the image / inspection condition storage device 34. The CPU and the input / output interface 36 as means may be configured to calculate more appropriate inspection conditions.

  As a result, in the determination value changing process (step S310), the CPU and the input / output interface 36 may set (change) the inspection conditions calculated by the CPU and the input / output interface 36 instead of the inspection conditions set in advance. In such a case, the CPU and the input / output interface 36 constitute a changing unit.

  With this configuration, it is possible to automatically perform re-inspection with a single button operation without, for example, an operator manually inputting new inspection conditions. As a result, it is possible to improve workability in the inspection condition verification work.

  Needless to say, the operator may manually input the inspection conditions calculated by the CPU and the input / output interface 36 via the input device 29.

  (D) Although not specifically mentioned in the above embodiment, in performing the re-inspection process, predetermined image data (used for validation work) stored in the image / inspection condition storage device 34 in advance before the execution of the inspection process. Image data, image data stored in past inspections performed in other lots, etc.) may be re-inspected.

  This makes it possible to determine whether the changed inspection conditions are appropriate not only for inspections related to a predetermined lot but also for inspections related to other lots. As a result, it is possible to further verify the validity of the inspection conditions. As a result, the inspection accuracy in the subsequent inspection can be further improved.

  (E) In the above-described embodiment, it has already been described that the image data may be processed when the inspection is executed. However, when the defect is determined, the image data itself directly output from the camera 26 is converted into an image. When data is stored in the image / inspection condition storage device 34, for example, condition information relating to processing such as binarization reference data (binarization threshold) cannot be calculated from the image data.

  Therefore, in addition to the sheet position follow-up amount and the determination value, condition information regarding such processing may be stored in the image / inspection condition storage device 34. In this way, the inspection can be faithfully reproduced even when the image data is processed when the inspection is executed.

  Of course, instead of storing such condition information, the image data after the processing may be stored in the image / inspection condition storage device 34.

  (F) Further, instead of the above-described embodiment, in addition to the inspection condition (first condition) for performing the inspection, a condition (second condition) having a wider defect fitting range than that is set and obtained from the camera 26. Image data that meets the second condition may be collected from the obtained image data and stored in the image / inspection condition storage device 34 as image collection means.

  With this configuration, based on the image data collected in the image / inspection condition storage device 34, the inspection conditions can be reviewed so that, for example, the non-defective product error rate can be reduced, and the convenience can be improved. it can.

  DESCRIPTION OF SYMBOLS 1 ... PTP sheet, 2 ... Pocket part, 3 ... Container film, 4 ... Cover film, 5 ... Tablet, 6 ... PTP film, 11 ... PTP packaging machine, 21, 22 ... Inspection apparatus, 25 ... Illumination device, 26 ... Camera 27 ... Processing execution device, 28 ... Display device, 29 ... Input device, 31 ... Image memory, 32 ... Test result and statistical data memory, 33 ... Determination memory, 34 ... Image / inspection condition storage device, 35 ... Camera timing Control device, 36... CPU and input / output interface.

Claims (4)

An inspection apparatus used in the manufacture of a PTP sheet in which contents are stored in a pocket portion formed in a belt-shaped container film to be transported, and a cover film is attached so as to close the pocket portion,
Irradiating means for irradiating the container film containing the contents with predetermined light;
Imaging means capable of imaging the contents irradiated with the light and the container film;
An inspection unit that performs an inspection on a predetermined inspection object based on the image data obtained from the imaging unit and a predetermined inspection condition, and performs pass / fail determination of the inspection object;
When the inspection means makes a defect determination, the image data related to the inspection object determined to be defective and its related information are stored in association with the inspection result by the inspection means, and the inspection by the inspection means After the end, in association with these, storage means capable of storing the result of quality confirmation by the operator for the inspection object determined to be defective,
Change means capable of changing the inspection condition based on the information stored in the storage means;
Based on the image data stored in the storage unit and the changed inspection condition, a re-inspection unit that performs re-inspection on the inspection target and determines pass / fail of the inspection target , and the inspection unit An inspection apparatus comprising: a display means for displaying the inspection result by the operator, the pass / fail confirmation result by the operator, and the re-inspection result by the re-inspection means .   The inspection apparatus according to claim 1, further comprising a change condition calculation unit that calculates an arbitrary inspection condition to be changed by the change unit in consideration of information stored in the storage unit.   3. The inspection according to claim 1, wherein the re-inspection unit performs the re-inspection on predetermined image data stored in the storage unit in advance before the inspection unit performs the inspection. apparatus.   A PTP packaging machine comprising the inspection device according to claim 1.

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