WO2022215296A1 - 検査装置、ブリスター包装機及びブリスターパックの製造方法 - Google Patents
検査装置、ブリスター包装機及びブリスターパックの製造方法 Download PDFInfo
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- WO2022215296A1 WO2022215296A1 PCT/JP2021/043103 JP2021043103W WO2022215296A1 WO 2022215296 A1 WO2022215296 A1 WO 2022215296A1 JP 2021043103 W JP2021043103 W JP 2021043103W WO 2022215296 A1 WO2022215296 A1 WO 2022215296A1
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- Prior art keywords
- inspection
- imaging
- mirror
- container film
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Definitions
- the present invention relates to an inspection device for inspecting packaging containers such as blister packs, a blister packaging machine, and a method for manufacturing blister packs.
- blister packs have been widely used as packaging containers for packaging pharmaceuticals, foodstuffs, and electronic components.
- PTP press through package
- a PTP sheet is composed of a container film formed with pockets for containing contents such as tablets, and a cover film attached to the container film so as to seal the opening side of the pocket.
- the contents can be taken out by pressing the pocket portion from the outside and breaking through the cover film serving as a lid by the contents accommodated therein.
- Such a PTP sheet includes a pocket portion forming step of forming a pocket portion on a belt-shaped container film, a filling step of filling the pocket portion with contents, and a cover film on the container film so as to seal the opening side of the pocket portion. It is manufactured through an attaching step of attaching the two films, a separating step of separating the PTP sheet as the final product from the strip-shaped PTP film to which the two strip-shaped films are attached, and the like.
- the pocket portion when forming the pocket portion, it is common to draw a portion of the partially heat-softened belt-like container film by, for example, vacuum forming, pressure forming, plug forming, or plug-assisted pressure forming. . Therefore, in the pocket portion forming process, there is a possibility that various forming defects may occur not only in the pocket portion but also in the flange portion and the like around the pocket portion.
- Patent Document 1 that is, the configuration in which the area of the sheet portion of the blister sheet and the surface of the tablet, which is an area higher than that by the thickness of the tablet, are imaged with a single camera. Even if the heights of multiple areas are different, if the height difference is within the focus range (depth of field) of a single camera, the tablet and the sheet will be in focus. It is possible to perform imaging with matching
- the aperture in order to fit multiple inspection areas with different heights on the object to be inspected within the focus range, the aperture must be sufficiently small (for example, using a pinhole camera), except when the height difference is sufficiently small. ), long exposure times are required.
- Patent Literatures 2 and 3 have a complicated optical system structure and require a special design for each object to be inspected, which may result in poor versatility and high cost.
- the present invention has been made in view of the above circumstances, and its object is to provide an inspection device, a blister packaging machine, and a method of manufacturing a blister pack that can improve inspection accuracy and simplify the structure. That's what it is.
- Means capable of irradiating a predetermined light onto the conveyed inspected object; A predetermined optical system for correcting curvature of field, an imaging device capable of imaging the inspected object through the optical system, and a mirror capable of reflecting light incident from the inspected object toward the optical system.
- the imaging control means is at a first timing when a first inspection area of the object to be inspected (for example, a flange portion of a container) is positioned within a first focusing range of the imaging means that can be focused without the mirror; a first imaging process of imaging by the imaging means; In the first imaging process, a second inspection area of the object to be inspected (for example, the bottom of a container) that is out of the first focusing range is within the second focusing range of the imaging means that can be focused via the mirror. and a second imaging process of capturing an image of the second inspection area by the imaging means at a second positional timing.
- a first inspection area of the object to be inspected for example, a flange portion of a container
- the imaging control means is at a first timing when a first inspection area of the object to be inspected (for example, a flange portion of a container) is positioned within a first focusing range of the imaging means that can be focused without the mirror; a first imaging process of imaging by
- the above-mentioned “conveyance” includes continuous conveyance in which the object to be inspected is continuously conveyed, intermittent conveyance in which the object to be inspected is intermittently conveyed, and the like.
- predetermined light includes not only visible light but also ultraviolet light and infrared light.
- the above “field curvature” is an aberration in which the focal planes parallel to the optical system do not correspond from plane to plane on the front and rear sides of the optical system.
- predetermined optical system includes, for example, one constructed from one optical member (single lens, etc.) and one constructed from a plurality of optical members (lens group unit, etc.).
- the above "light incident from the object to be inspected” includes reflected light reflected from the object to be inspected, transmitted light passing through the object to be inspected, and the like.
- the "mirror” is arranged at a position that intersects at least the optical path that passes through the range of the angle of view of the optical system and that does not intersect the optical axis (center line of the angle of view) of the optical system.
- the imaging means according to the above means 1 has a predetermined optical system in which curvature of field is corrected, and a mirror capable of reflecting light incident from an object to be inspected toward the optical system.
- the in-focus plane on the object side is also flat with respect to the plane of the imaging element on the image side. Therefore, if the mirror is omitted, the distance (optical path length) from the imaging means to the height position at the center of the focusing range of the imaging means is the center of the field of view of the imaging means (optical system At the optical axis position, the distance is L0 (see FIG. 7), but at the end of the field of view of the imaging means, the distance is L1, which is longer than the distance L0.
- the mirror is provided, and by refracting the optical path of the light incident from the object to be inspected through the mirror, at least the height position (the position in the optical axis direction of the imaging means) can be changed without passing through the mirror. It is possible to set a second focus range where focus is achieved via a mirror at a position (a position lower or higher than the first focus range) different from the first focus range where focus is achieved.
- the first inspection area of the object to be inspected (for example, the flange portion of the container) that is in focus even if the image is captured directly without using a mirror
- the first inspection area is positioned within the first focusing range.
- the first inspection area is imaged by the imaging means (first imaging process).
- the second inspection area is the second focus.
- the second inspection area is imaged by the imaging means (second imaging process).
- the pass/fail judgment means determines the object to be inspected (the first inspection area and the second inspection area). pass/fail judgment is made for
- in-focus image data can be obtained for a plurality of inspection areas of the object to be inspected at different heights by using only one mirror without using a plurality of mirrors. It is possible to improve the inspection accuracy.
- the second inspection area of the object to be inspected is positioned at the same position as the position of the mirror in the conveying direction of the object to be inspected (for example, a position immediately below the mirror with respect to the object to be inspected which is horizontally conveyed).
- the mirror directs the light incident from the second inspection area to the optical system through an optical path parallel to the normal direction of the second inspection area (surface to be imaged) of the object to be inspected.
- the inspection device according to means 1 or 2, characterized in that it is arranged so as to be reflective.
- the second inspection area (surface to be imaged) can be imaged from the front, and inspection accuracy can be improved.
- Means 4. The inspection apparatus according to any one of means 1 to 3, further comprising mirror adjustment means capable of adjusting the orientation and/or position (height position, etc.) of the mirror.
- the height position of the second focus range and the second inspection area to be inspected are changed (for example, from the bottom of the container to the side wall). can do.
- the height position of the second focus range and the second inspection area to be inspected are changed (for example, from the bottom of the container to the side wall).
- the imaging means includes a second mirror capable of reflecting light incident from the object to be inspected toward the optical system, At a third timing when a third inspection area of the object to be inspected (for example, a side wall portion of a container) is positioned within a third focusing range of the imaging means that can be focused via the mirror. 4.
- the inspection apparatus according to any one of means 1 to 4, characterized in that it is configured to be able to execute a third imaging process of imaging the third inspection area by the imaging means.
- Means 6 A blister packaging machine comprising the inspection device according to any one of means 1 to 5.
- the blister packaging machine for example, PTP packaging machine
- the inspection device as in the above measure 5
- the blister packaging machine may be configured to include a discharge means for discharging a blister pack determined to be defective by the inspection device.
- the above "blister pack” includes, for example, PTP sheets containing tablets, portion packs containing foodstuffs, etc., and carrier tapes containing electronic components.
- a blister packaging machine for manufacturing a blister pack in which a predetermined content is accommodated in a pocket formed in the container film as the object to be inspected, and a cover film is attached so as to close the pocket.
- a conveying means for conveying the container film; pocket portion forming means for forming the pocket portion on the container film conveyed in a belt shape; filling means for filling the content into the pocket; attaching means for attaching the strip-shaped cover film to the container film in which the contents are filled in the pocket portion so as to close the pocket portion;
- Separating means including punching means for punching sheet by sheet) for separating the blister pack from the belt-shaped body (band-shaped blister film) in which the cover film is attached to the container film;
- a blister packaging machine comprising the inspection device according to any one of means 1 to 5. ”.
- the inspection device on the blister packaging machine as in the above means 6, the position, posture, and orientation of the container film with respect to the imaging means become constant. There is no need for adjustment or the like, and inspection can be speeded up. As a result, the number of processes required for one pocket can be greatly reduced, and the inspection processing speed can be greatly increased.
- a filling control means may be provided for controlling the operation of the filling means based on the inspection result by the inspection device and switching whether or not the content is filled into the pocket portion.
- a method for manufacturing a blister pack in which a predetermined content is accommodated in a pocket formed in a container film and a cover film is attached so as to close the pocket comprising: a pocket portion forming step of forming the pocket portion in the container film conveyed in a belt shape; a filling step of filling the content into the pocket portion; an attaching step of attaching the strip-shaped cover film to the container film in which the pocket portion is filled with the contents, so as to cover the pocket portion; a separating step of separating the blister pack from a band (band-shaped blister film) in which the cover film is attached to the container film (including a punching step of punching into sheets); An inspection step of inspecting the container film in which the pocket portion is formed as an object to be inspected, In the inspection step, an irradiation step of irradiating a predetermined light onto the container film in which the pocket portion is formed; The container film irradiated with the light is captured by using an imaging means having a predetermined optical system
- an imaging step of imaging At a first timing when the first inspection area (e.g., flange portion) of the container film is positioned within a first focusing range of the imaging means that can be focused without the mirror, the first inspection area is imaged.
- the second inspection area of the container film (for example, the bottom of the pocket portion) outside the first focusing range is within the second focusing range of the imaging means that can be focused via the mirror.
- a method for manufacturing a blister pack comprising: a second imaging step of imaging the second inspection area by the imaging means at a second timing of positioning.
- FIG. 1 is a perspective view of a PTP film;
- FIG. 1 is a schematic configuration diagram of a PTP packaging machine;
- FIG. It is a block diagram which shows the electrical structure of an inspection apparatus.
- FIG. 5 is a schematic diagram for explaining a focusing range when a lens that corrects curvature of field is used; It is a schematic diagram for demonstrating the focus range at the time of arranging a mirror.
- 4 is a flow chart showing a flange portion inspection routine; FIG.
- the PTP sheet 1 has a container film 3 having a plurality of pockets 2 and a cover film 4 attached to the container film 3 so as to cover the pocket portions 2. ing.
- the container film 3 is made of a colorless and transparent thermoplastic resin material such as PP (polypropylene) or PVC (polyvinyl chloride), and has translucency.
- the cover film 4 is made of an opaque material (for example, aluminum foil or the like) having a surface coated with a sealant made of, for example, polypropylene resin.
- the PTP sheet 1 is formed in a substantially rectangular shape in plan view.
- two rows of pocket rows each including five pocket portions 2 arranged along the longitudinal direction are formed in the transverse direction. That is, a total of ten pocket portions 2 are formed.
- Each pocket portion 2 contains one tablet 5 as a content.
- the pocket portion 2 has a substantially circular bottom portion 2a in a plan view arranged so as to face the cover film 4, and a substantially cylindrical shape that is connected to the periphery of the bottom portion 2a and connects the bottom portion 2a and the flange portion 3b. and a side wall portion 2b.
- the flange portion 3b in the present embodiment refers to a substantially flat portion of the container film 3 where the pocket portion 2 is not formed and to which the cover film 4 is attached (pocket portion non-forming region).
- the bottom portion 2a in the present embodiment is shaped to have a gently curved, generally arcuate cross section, the configuration is not limited to this, and the bottom portion 2a may be shaped to be flat. Further, it may be configured to have an arcuate cross-section with a larger curvature so that the corner 2c where the bottom 2a and the side wall 2b intersect is not obvious.
- the PTP sheet 1 (see FIG. 1) is manufactured by punching a strip-shaped PTP film 6 (see FIG. 3) formed from a strip-shaped container film 3 and a strip-shaped cover film 4 into a rectangular sheet.
- the container film 3 constitutes an inspection object in this embodiment.
- the strip-shaped container film 3 is wound into a roll.
- the lead end side of the container film 3 wound in a roll is guided by a guide roll 13 .
- the container film 3 is hung on the intermittent feed roll 14 on the downstream side of the guide roll 13 .
- the intermittent feed roll 14 is connected to a motor that rotates intermittently, and transports the container film 3 intermittently.
- a heating device 15 and a pocket forming device 16 are arranged in order.
- the heating device 15 and the pocket forming device 16 constitute pocket forming means in this embodiment.
- the heating device 15 includes an upper heater plate 15a and a lower heater plate 15b so as to sandwich the conveying path of the container film 3.
- the heater plates 15a and 15b each have a heating heater (not shown), and are configured to move toward or away from the container film 3 .
- the intermittently transported container film 3 is sandwiched between the heater plates 15a and 15b during the temporary stop, so that the portion to be molded of the pocket portion 2 is partially heated. becomes softened.
- the pocket portion forming device 16 includes an upper mold 16a and a lower mold 16b so as to sandwich the conveying path of the container film 3, and is configured to be capable of forming the pocket portion 2 by a plug-assisted air pressure forming method. Then, a plurality of pocket portions 2 are formed at a time by the pocket portion forming device 16 at predetermined positions of the container film 3 heated by the heating device 15 and made relatively soft (pocket portion forming step). Alternatively, other forming methods such as vacuum forming, pressure forming, and plug forming may be used.
- the forming of the pocket portion 2 is performed during the interval between the conveying operations of the container film 3 by the intermittent feed rolls 14 . Further, in this embodiment, a total of 20 pocket portions 2 corresponding to two PTP sheets 1 are simultaneously formed by one operation of the pocket portion forming device 16 . That is, five pocket portions 2 are simultaneously formed in the film width direction (Y-axis direction) of the container film 3 and four pocket portions 2 are formed in the film transport direction (X-axis direction). Of course, a different number of pocket portions 2 may be molded at the same time.
- the container film 3 sent out from the intermittent feed roll 14 is placed on the tension roll 18, the guide roll 19 and the film receiving roll 20 in this order.
- the film receiving roll 20 Since the film receiving roll 20 is connected to a motor that rotates at a constant speed, it conveys the container film 3 continuously at a constant speed.
- the tension roll 18 is in a state where the container film 3 is stretched by elastic force, and prevents the container film 3 from being slackened due to the difference in conveying operation between the intermittent feed roll 14 and the film receiving roll 20, thereby tightening the container.
- the film 3 is kept in tension at all times.
- An inspection device 21 and a tablet filling device 22 are arranged in order along the transport path of the container film 3 between the guide roll 19 and the film receiving roll 20 .
- the inspection device 21 is for inspecting (inspecting process) the state of the container film 3 after the pocket portion 2 has been formed by the pocket portion forming device 16 . A detailed configuration of the inspection device 21 will be described later.
- the tablet filling device 22 functions as filling means for automatically filling the pocket portion 2 with the tablets 5 .
- the tablet filling device 22 drops the tablets 5 by opening the shutter at predetermined intervals in synchronism with the conveying operation of the container film 3 by the film receiving roll 20. With this opening operation of the shutter, each pocket portion is dropped. 2 is filled with tablets 5 (filling step).
- the operation of the tablet filling device 22 is controlled by a filling control device 82 as filling control means, which will be described later.
- the strip-shaped original fabric of the cover film 4 is wound into a roll on the most upstream side.
- a lead end of the cover film 4 wound in a roll is guided toward the heating roll 25 by the guide roll 24 .
- the heating roll 25 can be pressed against the film receiving roll 20, and the container film 3 and the cover film 4 are fed between the two rolls 20,25.
- the container film 3 and the cover film 4 pass between the rolls 20 and 25 in a heated and pressure-bonded state, so that the cover film 4 is adhered to the container film 3 and the pocket portion 2 is closed with the cover film 4. (attachment process).
- the PTP film 6 is manufactured as a belt-shaped body in which the tablets 5 are accommodated in the respective pocket portions 2 .
- the film receiving roll 20 and the heating roll 25 constitute the attaching means in this embodiment.
- the PTP film 6 sent out from the film receiving roll 20 is hung on the tension roll 27 and the intermittent feed roll 28 in this order.
- the intermittent feed roll 28 intermittently conveys the PTP film 6 because it is connected to a motor that rotates intermittently.
- the tension roll 27 is in a state in which the PTP film 6 is stretched by its elastic force, preventing the PTP film 6 from slack due to the difference in the conveying operation between the film receiving roll 20 and the intermittent feed roll 28, thereby preventing the PTP film 6 from becoming loose.
- the film 6 is always held in tension.
- the PTP film 6 sent out from the intermittent feed roll 28 is hung on the tension roll 31 and the intermittent feed roll 32 in this order.
- the intermittent feed roll 32 intermittently conveys the PTP film 6 because it is connected to a motor that rotates intermittently.
- the tension roll 31 is in a state in which the PTP film 6 is pulled to the tension side by elastic force, and the slackness of the PTP film 6 between the intermittent feed rolls 28 and 32 is prevented.
- the slit forming device 33 has a function of forming a separation slit at a predetermined position of the PTP film 6 .
- the marking device 34 has a function of marking a predetermined position (for example, tag portion) of the PTP film 6 .
- the PTP film 6 sent out from the intermittent feed roll 32 is wound on the tension roll 35 and the continuous feed roll 36 in this order on the downstream side.
- a sheet punching device 37 is arranged along the transport path of the PTP film 6 between the intermittent feed roll 32 and the tension roll 35 .
- the sheet punching device 37 has a function as sheet punching means (separating means) for punching the outer edges of the PTP film 6 into individual PTP sheets.
- the PTP sheet 1 punched by the sheet punching device 37 is conveyed by a pick-up conveyor 38 and temporarily stored in a finished product hopper 39 (separation step).
- a defective product signal is input from a filling control device 82 (to be described later) to the defective sheet discharging mechanism 40 as a discharging means capable of selectively discharging the PTP sheet 1, the defective PTP sheet 1 is discharged. It is separately discharged by mechanism 40 and transferred to a defective product hopper (not shown).
- a cutting device 41 is arranged downstream of the continuous feed roll 36 .
- a scrap portion 42 remaining in a belt shape after punching by the sheet punching device 37 is guided to the cutting device 41 after being guided by the tension roll 35 and the continuous feeding roll 36 .
- the driven roll is pressed against the continuous feeding roll 36, and the conveying operation is performed while holding the scrap portion 42 therebetween.
- the cutting device 41 has a function of cutting the scrap portion 42 to a predetermined size. After the cut scrap portion 42 is stored in the scrap hopper 43, it is disposed of separately.
- the rollers 14, 19, 20, 28, 31, 32, etc. constituting the conveying means have a positional relationship in which the surface of the roll and the pocket portion 2 face each other. Since the concave portion is formed to accommodate the pocket portion 2, the pocket portion 2 is basically not crushed. Further, the feeding operation is performed while the pocket portion 2 is accommodated in the concave portion of each roll 14 or the like, so that the intermittent feeding operation and the continuous feeding operation are reliably performed.
- the inspection apparatus 21 includes an illumination device 50 as irradiation means, a camera 51 as imaging means, and an inspection control section 52 for controlling these.
- the lighting device 50 is arranged on one side in the normal direction of the container film 3 that is conveyed in the horizontal direction (in this embodiment, on the lower side, which is the projecting side of the pocket portion 2).
- the illumination device 50 has a light irradiation section 50a and a diffusion plate 50b covering it, and is configured to be capable of surface emission.
- the illumination device 50 in this embodiment irradiates a predetermined range of the container film 3 with ultraviolet light.
- the camera 51 is arranged on the other side in the normal direction of the horizontally transported container film 3 (in this embodiment, on the upper side, which is the opening side of the pocket portion 2).
- the camera 51 has an imaging element 51a, a lens 51b as a predetermined optical system, a bandpass filter 51c, a mirror 51d, and the like.
- the camera 51 is arranged so that the optical axis CL of the lens 51b is along the normal direction of the container film 3 (bottom portion 2a and flange portion 3b of the pocket portion 2), that is, along the vertical direction (Z-axis direction) orthogonal to the container film 3. It is
- the imaging element 51a of this embodiment employs a known CCD area sensor that has sensitivity in the wavelength region of the ultraviolet light emitted from the illumination device 50.
- a CCD area sensor has a light-receiving surface in which a plurality of light-receiving elements are two-dimensionally arranged in a matrix.
- the imaging element 51a is not limited to this, and other sensors having sensitivity in the wavelength region of ultraviolet light may be employed.
- a CMOS sensor or the like may be employed.
- a lens whose field curvature is corrected is used as the lens 51b of the present embodiment.
- Field curvature is the aberration at the image and object sides of a lens where the in-focus planes parallel to the lens do not correspond from plane to plane.
- the in-focus plane on the object side becomes flat with respect to the plane on the image side (light receiving surface of the imaging element 51a).
- the mirror 51d is arranged in this embodiment.
- the mirror 51d has a rectangular flat plate shape and has a length substantially equal to the film width of the container film 3 in the film width direction (Y-axis direction).
- the mirror 51d is arranged at a position where its center position M intersects the optical path of light incident on the camera 51 (lens 51b) at an angle ⁇ 1 in the XZ plane of FIG.
- the angle of view of the lens 51b is "2 ⁇ 1". That is, the mirror 51d is arranged at a position that intersects the optical path passing through the end of the angle of view of the lens 51b in the film transport direction (X-axis direction).
- L0 is the optical path of the transmitted light incident on the camera 51 (lens 51b) along the center of the field of view (optical axis CL) of the camera 51, and the transmitted light
- the optical path length from the height position of the central portion of the first focusing range GW1 to be traced to the camera 51 is shown.
- L1 is the virtual optical path of transmitted light incident on the camera 51 (lens 51b) at an angle ⁇ 1 when the mirror 51d is omitted, and the height of the central portion of the first focusing range GW1 followed by the transmitted light.
- the optical path length from the vertical position to the camera 51 is shown.
- L2 is the refracted optical path of the transmitted light incident on the camera 51 (lens 51b) at the angle ⁇ 1 when the mirror 51d is arranged, and the height of the central portion of the second focusing range GW2 followed by the transmitted light.
- the optical path length from the vertical position to the camera 51 is shown.
- ⁇ 1 indicates the incident angle of transmitted light incident on the camera 51 (lens 51b).
- ⁇ 2 indicates the inclination angle between the virtual optical path L1 and the object-side section from the central height position of the second focusing range GW2 to the mirror 51d in the refracted optical path L2.
- the incident angle .theta.1 and the tilt angle .theta.2 are set to be the same angle. In other words, it is set so that transmitted light incident along the Z-axis direction from a position just below the center position M of the mirror 51d is reflected by the mirror 51d and is incident on the camera 51 at an incident angle ⁇ 1.
- H1 indicates the distance (height difference) from the camera 51 to the center position M of the mirror 51d in the optical axis CL direction (Z-axis direction).
- H2 indicates the distance (height difference) from the camera 51 to the height position of the central portion of the first focus range GW1 in the optical axis CL direction (Z-axis direction).
- H3 indicates the distance (height difference) from the camera 51 to the height position of the central portion of the second focus range GW2 in the optical axis CL direction (Z-axis direction).
- ⁇ GW indicates the height difference between the central height position of the first focusing range GW1 and the central height position of the second focusing range GW2.
- the height difference ⁇ GW is uniquely defined by the angle of view “2 ⁇ 1” of the lens 51b described above, the height difference H1 between the camera 51 and the mirror 51d, and the inclination angle ⁇ 2 of the object-side section of the refracted optical path L2 with respect to the virtual optical path L1. determined.
- Lb the radius just below the center position M of the mirror 51d.
- a position just below the center position M of the mirror 51d is the lowest end of the second focusing range GW2, and the height difference ⁇ GW is maximized.
- the bandpass filter 51c is provided so that only ultraviolet light enters the lens 51b. As a result, of the ultraviolet light emitted from the lighting device 50 , only the ultraviolet light that has passed through the container film 3 is two-dimensionally imaged by the camera 51 .
- the transmission image data acquired by the camera 51 in this way becomes luminance image data in which luminance differs at each pixel (each coordinate position) based on the difference in the transmittance of ultraviolet light in the container film 3 .
- the bandpass filter 51c for example, one that passes only ultraviolet light with a wavelength of 253 ⁇ 20 nm, which makes the transmittance of the container film 3 about 30 ⁇ 10%, is used. This is because even if the transmittance of light passing through the container film 3 such as the bottom portion 2a and the flange portion 3b of the pocket portion 2 is too high or too low, there is no difference in light transmittance between the thin portion and the thick portion. It is because there is a possibility that it may become difficult to occur.
- the field of view (imaging range) of the camera 51 in this embodiment is a range including at least one row of pockets positioned at a predetermined position in the film transport direction (X-axis direction) of the container film 3, that is, the film width of the container film 3.
- a range including five pocket portions 2 in the direction (Y-axis direction) and one pocket portion 2 in the film transport direction (X-axis direction) is set to be imageable at once.
- the inspection control unit 52 is configured by a so-called computer system, and includes an image memory 53, a calculation result storage device 54, a judgment memory 55, a camera timing control unit 56, an illumination control unit 57, and electrically connected to these.
- a microcomputer 58 is provided.
- the image memory 53 stores various image data such as transmission image data acquired by the camera 51, masked image data masked during inspection, and binarized image data binarized. .
- the calculation result storage device 54 stores inspection result data, statistical data obtained by probabilistically processing the inspection result data, and the like.
- the judgment memory 55 is for storing various information used for inspection. These various types of information include, for example, the shape and dimensions of the PTP sheet 1, the pocket portion 2, and the tablet 5, and the inspection range (a substantially rectangular range including a row of pockets consisting of five pocket portions 2).
- the shape and size of the inspection frame and the relative positional relationship with the camera 51, the shape and size of the pocket frame for defining the area of the pocket part 2 and the relative positional relationship with the camera 51 (or inspection frame), binarization processing , and criteria for determining whether the container film 3 (the pocket portion 2 and the flange portion 3b) is good or bad are set and stored.
- the camera timing control unit 56 is for controlling the execution timing of imaging processing by the camera 51 . Such timing is controlled based on a signal from an encoder (not shown) provided in the PTP packaging machine 11 . Therefore, the inspection control section 52 constitutes the imaging control means in this embodiment.
- the lighting control unit 57 is for controlling the lighting device 50, and turns on the light irradiation unit 50a in accordance with the execution timing of the imaging process by the camera 51 to irradiate a predetermined range of the container film 3 with ultraviolet light.
- the container film 3 is irradiated with ultraviolet light from the illumination device 50, and the ultraviolet light transmitted through the container film 3 is imaged by the camera 51. executed.
- Transmissive image data acquired by the camera 51 is converted into a digital signal (image signal) inside the camera 51, and then taken into the inspection control section 52 (image memory 53) in the form of a digital signal.
- the microcomputer 58 includes a CPU 58a as a computing means, a ROM 58b that stores various programs, a RAM 58c that temporarily stores various data such as computation data and input/output data, and controls various controls in the inspection control section 52.
- the microcomputer 58 executes various processing programs for executing inspections using the contents stored in the judgment memory 55 and the like. Further, the microcomputer 58 is configured to be able to transmit and receive signals to and from a filling control device 82, which will be described later, and is configured to be able to output, for example, inspection results to the filling control device 82.
- FIG. 1 A block diagram illustrating an exemplary computing environment in accordance with the present disclosure.
- the filling control device 82 is for controlling the filling of the tablets 5 by the tablet filling device 22, and is composed of a computer system having a CPU, a RAM, and the like.
- the filling control device 82 is configured to be able to switch and control whether or not to fill the predetermined pocket portion 2 with the tablet 5 based on the inspection result by the inspection device 21 .
- the filling control device 82 receives the inspection result of the predetermined PTP sheet 1 (the state of the ten pocket portions 2 and the state of the flange portion 3b) from the inspection device 21, and the inspection result is determined as a non-defective product. If so, the tablet filling device 22 is controlled so as to fill all the ten pockets 2 included in the PTP sheet 1 with the tablets 5 .
- the tablet filling device 22 is controlled so as not to fill all the 10 pocket portions 2 included in the PTP sheet 1 with the tablets 5. .
- a defective product signal is output to the defective sheet discharge mechanism 40 .
- the defective sheet discharge mechanism 40 discharges the PTP sheet 1 (defective sheet) associated with the defective product signal.
- the inspection routine (flange inspection routine) related to the flange inspection shown in FIG. 9 is a process performed for each predetermined inspection range including a row of pockets (five pockets 2) arranged along the film width direction. is. A detailed description will be given below.
- the area corresponding to the flange portion 3b in this inspection range corresponds to the first inspection area in this embodiment.
- a predetermined position in the film conveying direction of the molded container film 3 of the pocket portion 2 corresponds to the camera in the film conveying direction.
- 51 the optical axis CL of the lens 51 b
- at least the flange portion 3 b is positioned within the first focus range GW 1 within the field of view (imaging range) of the camera 51 .
- the inspection control unit 52 executes inspection image acquisition processing (step S1). Specifically, first, an irradiation process (irradiation step) of irradiating a predetermined range of the container film 3 including the inspection range with ultraviolet light from the lighting device 50 is performed, and a predetermined range including the inspection range is scanned by the camera 51. A first imaging process (first imaging step) of imaging is performed.
- the flange portion 3b of the container film 3 is in focus, and the bottom portion 2a of the pocket portion 2 is out of focus. It is in a displaced state. Therefore, while the foreign matter K1 existing on the flange portion 3b can be clearly recognized, the foreign matter K2 (see FIG. 14) actually existing on the bottom portion 2a of the pocket portion 2 is unclear. It is in an unrecognizable state.
- a predetermined number of pockets including one row (five pocket portions 2) is obtained using the inspection frame based on the transparent image data.
- image data relating to the inspection range of is acquired as an inspection image relating to the inspection of the flange portion.
- the inspection image may be configured to be processed in various ways. For example, there is a technical limit to uniformly irradiating the entire imaging range of the camera 51 with light from the illumination device 50. Therefore, a configuration for performing shading correction that corrects variations in light intensity (luminance) caused by differences in position. may be
- the inspection control unit 52 executes mask processing in the subsequent step S2. Specifically, the pocket frames are set in accordance with the positions of the five pocket portions 2 on the inspection image acquired in step S1, and the regions corresponding to the pocket portions 2 specified by the pocket frames are Perform masking processing.
- the set position of the pocket frame is determined in advance according to the relative positional relationship with the inspection frame. Therefore, in this embodiment, the set position of the pocket frame is not adjusted each time according to the inspection image.
- the setting position of the pocket frame may be appropriately adjusted based on the information.
- step S3 the inspection control unit 52 executes defective area identification processing.
- step S2 whether or not the luminance value of each pixel of the inspection image subjected to mask processing satisfies a predetermined determination criterion set in advance for each pixel (whether it is within a predetermined allowable range). ) is determined, and pixels that do not satisfy the determination criteria are identified as defective areas.
- binarization processing is performed using the upper and lower limits of the allowable range as luminance thresholds.
- portions with high light transmittance such as thin wall defect locations and perforated defect locations, are detected as "bright areas" exceeding the upper limit of the allowable range.
- a portion with a foreign substance K1 see FIG. 13
- a portion with a low light transmittance such as a keloid defective portion are detected as a “dark portion” below the lower limit of the allowable range.
- the inspection control unit 52 executes bulk processing. Specifically, the connected components of the “dark portion” and the “light portion” acquired in step S3 are specified, and the area value P of the connected component of the “dark portion” and the “light portion” specified as the defective region A total defective area Px, which is the total value of .
- step S5 the inspection control unit 52 determines whether or not the total defective area Px calculated in step S4 is equal to or less than the preset determination reference Po.
- the quality of the flange portion 3b is determined by determining whether the total defective area Px is within the allowable range. Therefore, the function of executing the pass/fail judgment process (pass/fail judgment step) in step S5 constitutes the pass/fail judgment means in this embodiment.
- a method of determining whether or not the maximum area is within the allowable range a method of determining whether the "dark area , or the degree of variation (distribution state) of the connected components of the "bright portion".
- a method of determining whether the "dark area or the degree of variation (distribution state) of the connected components of the "bright portion.
- step S6 the inspection range is determined to be "non-defective" and this inspection routine ends.
- step S5 the inspection range is determined to be "defective" in step S7, and this inspection routine ends.
- the inspection control unit 52 stores the inspection result corresponding to the inspection range in the calculation result storage device 54, and the filling control device 82 Output.
- the inspection routine (pocket inspection routine) related to the pocket inspection shown in FIG. This processing is performed for each inspection range of . A detailed description will be given below.
- region corresponding to the bottom part 2a of five pocket parts 2 of this inspection range corresponds to the 2nd inspection area
- a predetermined position in the film transport direction of the molded container film 3 of the pocket portion 2 is a mirror in the film transport direction.
- the position P2 directly below 51 d is reached, at least the bottom portion 2 a of the pocket portion 2 is positioned within the second focus range GW 2 within the field of view (imaging range) of the camera 51 .
- the inspection control unit 52 executes inspection image acquisition processing (step S11). Specifically, first, an irradiation process (irradiation step) of irradiating a predetermined range of the container film 3 including the inspection range with ultraviolet light from the illumination device 50 is performed, and a predetermined range (imaging range) including the inspection range is executed. is imaged by the camera 51 (second imaging step).
- the bottom 2a of the pocket portion 2 is in focus, and the flange portion 3b of the container film 3 is out of focus. It is in a displaced state. Therefore, while the foreign matter K2 existing on the bottom portion 2a of the pocket portion 2 can be clearly recognized, the foreign matter K1 actually existing on the flange portion 3b is unclear and cannot be recognized. ing.
- a predetermined number of pockets including one row (five pocket portions 2) is obtained using the inspection frame based on the transparent image data.
- image data relating to the inspection range of is acquired as an inspection image relating to the pocket portion inspection.
- the inspection image may be processed in various ways. For example, shading correction for correcting variations in light intensity (luminance) may be performed.
- the inspection control unit 52 executes mask processing in the subsequent step S12. Specifically, the pocket frames are set in accordance with the positions of the five pocket portions 2 on the inspection image acquired in step S11, and the area other than the pocket portions 2 specified by the pocket frames, that is, A masking process is performed on the region corresponding to the flange portion 3b.
- step S13 the inspection control unit 52 sets "0" to the value of the non-defective product flag of all the pocket portions 2.
- the "pocket non-defective product flag” is for indicating the quality determination result of the corresponding pocket portion 2, and is set in the calculation result storage device 54.
- the value of the corresponding pocket non-defective flag is set to "1".
- the inspection control unit 52 sets the value C of the pocket number counter set in the calculation result storage device 54 to "1", which is the initial value.
- the “pocket number” is a serial number set corresponding to each of the five pocket portions 2 within one inspection range, and the value C of the pocket number counter (hereinafter simply referred to as "pocket number C").
- the position of the pocket part 2 can be specified by.
- step S15 the inspection control unit 52 determines whether or not the pocket number C is equal to or less than the number of pockets N ("5" in this embodiment) per inspection range.
- step S16 the inspection control unit 52 executes processing for extracting a pocket inspection image related to the pocket portion 2 of the current pocket number C.
- step S17 the inspection control unit 52 executes defective area identification processing.
- the inspection control unit 52 executes defective area identification processing.
- binarization processing is performed using the upper and lower limits of the allowable range as luminance thresholds.
- portions with high light transmittance such as thin wall defect locations and perforated defect locations, are detected as "bright areas" exceeding the upper limit of the allowable range.
- a portion with a foreign substance K2 see FIG. 14
- a portion with a low light transmittance such as a keloid defective portion are detected as a “dark portion” below the lower limit of the allowable range.
- the inspection control unit 52 executes bulk processing. Specifically, the connected components of the “dark portion” and the “bright portion” acquired in step S17 are specified, and the area value P A total defective area Px, which is the total value of .
- step S19 the inspection control unit 52 determines whether or not the total defective area Px calculated in step S18 is equal to or less than the preset determination reference Po. That is, the quality of the pocket portion 2 is judged by judging whether or not the total defective area Px is within the allowable range. Therefore, the function of executing the pass/fail judgment process (pass/fail judgment step) in step S19 constitutes the pass/fail judgment means in this embodiment.
- step S19 If the determination in step S19 is affirmative that the total defective area Px is equal to or less than the criterion Po, the process proceeds to step S20. On the other hand, if a negative determination is made here, the pocket portion 2 corresponding to the current pocket number C is regarded as defective, and the process proceeds to step S21.
- step S20 the inspection control unit 52 determines that the pocket portion 2 corresponding to the current pocket number C is non-defective, and sets the value of the pocket non-defective product flag corresponding to the pocket number C to "1". Move to
- step S21 the inspection control unit 52 adds "1" to the current pocket number C, and then returns to step S15.
- step S16 if the newly set pocket number C is still equal to or smaller than the pocket number N, the process moves to step S16 again, and the series of processes described above is repeated.
- step S22 if it is determined that the newly set pocket number C has exceeded the number of pockets N, it is considered that the quality determination process for all pocket portions 2 has been completed, and the process proceeds to step S22.
- step S22 the inspection control unit 52 determines whether or not the value of the non-defective pocket flag of all the pocket portions 2 within the inspection range is "1".
- step S23 the inspection range is determined to be "non-defective", and this inspection routine ends.
- step S22 determines whether there is at least one pocket portion 2 determined to be "defective" within the inspection range. If a negative determination is made in step S22, that is, if there is at least one pocket portion 2 determined to be "defective" within the inspection range, the inspection range is determined to be “defective” in step S24. and terminate this inspection routine.
- the inspection control unit 52 stores the inspection result corresponding to the inspection range in the calculation result storage device 54, and the filling control device 82 Output.
- the camera 51 includes a lens 51b for correcting curvature of field, and a mirror 51d capable of reflecting transmitted light incident from the container film 3 toward the lens 51b.
- a second focusing range GW2 in which the subject is focused via the mirror 51d is set at a position lower than this.
- the first timing (in this embodiment, At the timing when the central position of the bottom portion 2a of the pocket portion 2 in the film transport direction passes the position P1 directly below the camera 51 in the film transport direction, a first imaging process is performed to image the inspection range including the flange portion 3b. .
- the bottom portion 2a of the pocket portion 2 which is focused via the mirror 51d (it is not focused in direct imaging without the mirror 51d)
- the bottom portion 2a of the pocket portion 2 is within the second focusing range GW2.
- the second timing in this embodiment, the timing at which the central position of the bottom 2a of the pocket 2 in the film transport direction passes through the position P2 directly below the mirror 51d in the film transport direction
- the bottom of the pocket 2 A second imaging process for imaging the inspection range including 2a is executed.
- the flange portion inspection is performed to make a quality judgment
- the second inspection image (pocket portion inspection image) acquired by the second imaging process Based on this image, the pocket part is inspected and the pass/fail judgment is made.
- a single camera 51 can detect a plurality of inspection areas (flange portion 3b and bottom portion of pocket portion 2) having different heights on container film 3 only by using one mirror 51d without using a plurality of mirrors.
- 2a it is possible to acquire focused image data (flange portion inspection image and pocket portion inspection image), thereby improving inspection accuracy.
- the configuration of the packaging container to be inspected is not limited to the above embodiment.
- a PTP sheet 1 containing contents such as tablets 5 is exemplified as an example of a blister pack.
- a peel-open type blister pack (such as a portion pack containing foodstuffs) in which the contents are taken out by peeling off the cover film from the container film, and a blister containing and transporting contents such as electronic parts
- a blister pack containing and transporting contents
- Various types of blister packs can be inspected, such as packs (carrier tape, etc.), and blister packs of a type in which a backing paper or the like is attached to the container film without a cover film attached.
- the shape, size, depth, number, arrangement, etc. of the pockets in the container film are not limited to the above embodiments, and may vary depending on the type, shape, application, etc. of the contents. It can be selected as appropriate.
- the bottom portion 2a of the pocket portion 2 may be substantially triangular, substantially elliptical, substantially quadrangular, substantially diamond-shaped, or the like in plan view.
- a blister pack 100 as shown in FIG. 15 can be used as an inspection object.
- the blister pack 100 has a pocket portion 101 .
- the pocket portion 101 is composed of a rectangular bottom portion 101a in plan view and a rectangular frame-like side wall portion 101b connected around the bottom portion 101a.
- the material, layer structure, etc. of the container film and cover film are not limited to the above embodiment.
- the container film 3 is made of a colorless and transparent thermoplastic resin material such as PP or PVC, and has translucency.
- the container film 3 may be formed of not only a colorless translucent resin material, a colored transparent or colored translucent resin material, but also an opaque material (opaque resin material, metal material, etc.). good.
- the metal material include aluminum-based materials such as aluminum laminate films.
- a reflected light inspection using reflected light is performed.
- the inspection device 21 is arranged in the PTP packaging machine (blister packaging machine) 11, which performs filling of contents such as tablets 5 and the like.
- the configuration may be such that the production apparatus for the container film 3 is provided with the inspection device 21 .
- an off-line inspection device for inspecting the formed container film 3 of the pocket portion 2 may be provided. Further, in such a case, the inspection device 21 may be provided with transport means capable of transporting the container film 3 .
- the arrangement position of the inspection device 21 in the PTP packaging machine 11 is not limited to the above embodiment.
- the inspection device 21 is arranged at a position where the container film 3 is horizontally conveyed.
- the inspection device 21 may be arranged at a position where the wafer 3 is conveyed obliquely.
- the arrangement configuration of the irradiation means and the imaging means is not limited to the above embodiment, and other different configurations may be adopted.
- the illumination device 50 is arranged below the container film 3 (on the projecting side of the pocket portion 2), and the camera 51 is arranged above the container film 3 (on the opening side of the pocket portion 2). It has an arranged configuration.
- the positional relationship between the lighting device 50 and the camera 51 is turned upside down, and light is emitted from the upper side of the container film 3 (opening side of the pocket portion 2), and the lower side of the container film 3 (the opening side of the pocket portion 2).
- a configuration in which transmitted light is captured from the projecting side) may also be used.
- the first focusing range GW1 of the camera 51 is set according to the height position of the bottom portion 2a of the pocket portion 2 located on the lower side, and is aligned with the height position of the flange 3b of the container film 3 located on the upper side.
- the second focusing range GW2 of the camera 51 may be set by using the second focusing range GW2. That is, the bottom portion 2a of the pocket portion 2 may be the first inspection area, and the flange 3b of the container film 3 may be the second inspection area.
- the first focusing range GW1 is set according to the height position of the bottom portion 2a of the pocket portion 2, and the value of the tilt angle ⁇ 2 is set larger than that in the above embodiment ( ⁇ 2> ⁇ 1 ), the second imaging process may be performed at the timing when the flange 3b of the container film 3 is positioned within the second focusing range GW2 above the first focusing range GW1.
- the object-side section of the optical path L2 focused via the mirror 51d is the normal direction (Z-axis direction) to the flange 3b of the container film 3 or the normal direction (Z-axis direction) to the bottom portion 2a of the pocket portion 2.
- the configuration according to the above embodiment is more preferable because it is preferable that the imaging is performed at the timing of passing the optical path parallel to .
- the timing of executing the second imaging process is preferably the timing when the bottom portion 2a of the pocket portion 2 and the flange 3b of the container film 3 are positioned at the same position as the position of the mirror 51d in the film transport direction.
- the horizontally transported container film 3 is turned upside down, and the lighting device 50 arranged below the container film 3 irradiates the opening side of the pocket portion 2 with light.
- the camera 51 may be arranged to capture an image of the light transmitted to the projecting side of the pocket portion 2 .
- the first focusing range GW1 is set according to the height position of the bottom portion 2a of the pocket portion 2 located above, and the second focusing range GW1 is set according to the height position of the flange 3b of the container film 3 located below.
- a configuration in which a focusing range GW2 is set may also be used.
- the first focus range GW1 is set according to the height position of the flange 3b of the container film 3, and the value of the tilt angle ⁇ 2 is set larger than that in the above embodiment ( ⁇ 2> ⁇ 1) to achieve the first focus.
- the second imaging process may be performed at the timing when the bottom portion 2a of the pocket portion 2 is positioned within the second focusing range GW2 above the focusing range GW1.
- both the irradiation means and the imaging means are arranged on either the projecting side or the opening side of the pocket portion 2, and the irradiation means emits light.
- a configuration in which reflected light reflected by the container film 3 is captured may be used.
- the inspection area of the object to be inspected is not limited to the above embodiment.
- the flange 3b of the container film 3 is used as the first inspection area
- the bottom portion 2a of the pocket portion 2 is used as the second inspection area.
- the configuration is not limited to this, and the container film 3 may be determined for quality by using the bottom portion 2a of the pocket portion 2 as the first inspection area and the side wall portion 2b of the pocket portion 2 as the second inspection area.
- the first focusing range GW1 is set according to the height position of the bottom portion 2a of the pocket portion 2 as the first inspection area, and the value of the inclination angle ⁇ 2 is set larger than that in the above embodiment ( ⁇ 2 > ⁇ 1), the second imaging process is performed at the timing when the side wall portion 2b of the pocket portion 2 as the second inspection area is positioned within the second focusing range GW2 located above the first focusing range GW1.
- the second imaging process is preferably performed at the timing when the object-side section of the optical path L2 focused via the mirror 51d passes through an optical path parallel to the normal direction of the inner surface of the side wall portion 2b of the pocket portion 2.
- the configuration related to the imaging means is not limited to the above embodiment.
- a single lens 51b is used as the predetermined optical system for correcting curvature of field.
- the configuration related to the mirror is not limited to the above embodiment.
- the mirror 51d according to the above embodiment is arranged at a position that intersects the optical path passing through the end of the angle of view of the lens 51b.
- the mirror 51d may be arranged at least at a position where it intersects the optical path passing through the range of the angle of view of the lens 51b and where it does not intersect the optical axis CL of the lens 51b. That is, the angle of view 2.theta. of the lens 51b may be set larger than 2.times..theta.1 (2.theta.>2.times..theta.1).
- mirror adjustment mechanism as mirror adjustment means capable of adjusting the orientation and/or position (height position, etc.) of the mirror 51d.
- the configuration may be such that each of the four corners of the rectangular plate-shaped mirror 51d is provided with an actuator that can move up and down individually.
- a structure may be provided in which a mechanism for performing tilt adjustment by rotating the mirror 51d about a predetermined rotation axis is provided, and a mechanism for performing height adjustment by vertically moving the mechanism is provided.
- the configuration may be provided with a mechanism that only moves vertically or horizontally, or a mechanism that only performs tilt adjustment.
- the camera 51 may be configured to include a second mirror in addition to the mirror 51d.
- the mirror 51d may be provided on the downstream side in the film transport direction of the optical axis CL of the camera 51, and the second mirror may be arranged on the upstream side in the film transport direction.
- a first focusing range GW1 is set according to the height position of the flange 3b of the container film 3
- a second focusing range GW2 is set according to the height position of the bottom portion 2a of the pocket portion 2
- a third A third focus range may be set according to the height position of the side wall portion 2b of the pocket portion 2 as the inspection area.
- a third imaging process of imaging the container film 3 is performed. configured to run.
- the illumination device 50 is configured to emit ultraviolet light, but the wavelength of the light emitted from the illumination device 50 can be changed as appropriate according to the material and color of the container film 3.
- the band-pass filter 51a may be omitted here, and the light emitted from the illumination device 50 and transmitted through the container film 3 may be directly incident on the lens 51b.
- the container film 3 is made of an opaque material such as aluminum, infrared light may be emitted from the illumination device 50 .
- infrared light may be emitted from the illumination device 50 .
- visible light such as white light may be emitted from the illumination device 50 .
- the flange portion inspection is performed based on the first inspection image (flange portion inspection image) acquired by the first imaging process, and the second inspection image (pocket portion inspection image) acquired by the second imaging process.
- the pocket portion inspection is executed based on the inspection image).
- image data related to a predetermined inspection range is generated, and the image data is generated. Based on this, a configuration may be adopted in which the flange portion inspection and the pocket portion inspection are performed respectively.
- a range including five pocket portions 2 in the film width direction of the container film 3 and one pocket portion 2 in the film transport direction, that is, a range including one row of pockets. is set as the imaging range or inspection range related to one inspection routine.
- a range including a plurality of rows (for example, four rows) of pocket rows may be set as the imaging range or inspection range for one inspection routine.
- the range corresponding to one PTP sheet 1 (the range including ten pocket portions 2) may be set as the imaging range or inspection range for one inspection routine.
- the configuration related to the irradiation means is not limited to the above embodiment.
- ultraviolet light with a wavelength of 253 ⁇ 20 nm which causes the transmittance of the container film 3 to be approximately 30 ⁇ 10%, is used for inspection.
- infrared light or the like may be used in a configuration in which an inspection is performed by capturing an image of reflected light.
- the inspection method is not limited to the above embodiment.
- the inspection image is binarized to identify the defective area.
- an inspection image of the bottom portion 2a of the pocket portion 2 is compared with an inspection image of the bottom portion 2a of the pocket portion 2 of a non-defective product obtained in advance by a method such as pattern matching, and quality determination is made based on the degree of matching.
- a method such as pattern matching, and quality determination is made based on the degree of matching.
- an AI model built by learning a neural network may be used to determine whether the container film 3 is good or bad. For example, an inspection image obtained by imaging the container film 3 (the pocket portion 2 and the flange portion 3b) is compared with a reconstructed inspection image obtained by reconstructing the inspection image using an AI model to determine the quality. may be configured.
Abstract
Description
像面湾曲が補正される所定の光学系と、該光学系を介して前記被検査物を撮像可能な撮像素子と、前記被検査物から入射する光を前記光学系へ向けて反射可能なミラーとを有した撮像手段と、
前記撮像手段を制御可能な撮像制御手段と、
前記撮像手段により取得された画像データを基に前記被検査物の良否判定を実行可能な良否判定手段とを備え、
前記撮像制御手段は、
前記被検査物の第1検査領域(例えば容器のフランジ部)が前記ミラーを介さず合焦可能な前記撮像手段の第1合焦範囲内に位置する第1のタイミングで、該第1検査領域を前記撮像手段により撮像する第1撮像処理と、
前記第1撮像処理において前記第1合焦範囲から外れる前記被検査物の第2検査領域(例えば容器の底部)が前記ミラーを介して合焦可能な前記撮像手段の第2合焦範囲内に位置する第2のタイミングで、該第2検査領域を前記撮像手段により撮像する第2撮像処理とを実行可能に構成されていることを特徴とする検査装置。
前記撮像制御手段は、前記被検査物の第3検査領域(例えば容器の側壁部)が前記ミラーを介して合焦可能な前記撮像手段の第3合焦範囲内に位置する第3のタイミングで、該第3検査領域を前記撮像手段により撮像する第3撮像処理を実行可能に構成されていることを特徴とする手段1乃至4のいずれかに記載の検査装置。
前記容器フィルムを搬送する搬送手段と、
帯状に搬送される前記容器フィルムに対し前記ポケット部を成形するポケット部成形手段と、
前記ポケット部に前記内容物を充填する充填手段と、
前記ポケット部に前記内容物が充填された前記容器フィルムに対し、前記ポケット部を塞ぐようにして帯状の前記カバーフィルムを取着する取着手段と、
前記容器フィルムに前記カバーフィルムが取着された帯状体(帯状のブリスターフィルム)から前記ブリスターパックを切離す切離手段(シート単位に打抜く打抜手段を含む)と、
手段1乃至5のいずれかに記載の検査装置とを備えたことを特徴とするブリスター包装機。」。
「前記検査装置よりも下流側に前記充填手段を配置し、
前記検査装置による検査結果に基づき前記充填手段の動作を制御し、前記ポケット部に対する前記内容物の充填の可否を切換可能な充填制御手段を備えた」構成としてもよい。
帯状に搬送される前記容器フィルムに対し前記ポケット部を成形するポケット部成形工程と、
前記ポケット部に前記内容物を充填する充填工程と、
前記ポケット部に前記内容物が充填された前記容器フィルムに対し、前記ポケット部を塞ぐようにして帯状の前記カバーフィルムを取着する取着工程と、
前記容器フィルムに前記カバーフィルムが取着された帯状体(帯状のブリスターフィルム)から前記ブリスターパックを切離す切離工程(シート単位に打抜く打抜工程を含む)と、
前記ポケット部が成形された容器フィルムを被検査物として検査する検査工程とを備え、
前記検査工程において、
前記ポケット部が成形された容器フィルムに対し所定の光を照射する照射工程と、
像面湾曲が補正される所定の光学系と、前記容器フィルムから入射する光を前記光学系へ向けて反射可能なミラーとを有した撮像手段を用いて、前記光が照射された容器フィルムを撮像する撮像工程と、
前記撮像工程において取得された画像データを基に前記容器フィルムの良否判定を行う良否判定工程とを備え、
前記撮像工程においては、
前記容器フィルムの第1検査領域(例えばフランジ部)が前記ミラーを介さず合焦可能な前記撮像手段の第1合焦範囲内に位置する第1のタイミングで、該第1検査領域を前記撮像手段により撮像する第1撮像工程と、
前記第1撮像工程において前記第1合焦範囲から外れる前記容器フィルムの第2検査領域(例えばポケット部の底部)が前記ミラーを介して合焦可能な前記撮像手段の第2合焦範囲内に位置する第2のタイミングで、該第2検査領域を前記撮像手段により撮像する第2撮像工程とを備えたことを特徴とするブリスターパックの製造方法。
Claims (7)
- 搬送される被検査物に対し所定の光を照射可能な照射手段と、
像面湾曲が補正される所定の光学系と、該光学系を介して前記被検査物を撮像可能な撮像素子と、前記被検査物から入射する光を前記光学系へ向けて反射可能なミラーとを有した撮像手段と、
前記撮像手段を制御可能な撮像制御手段と、
前記撮像手段により取得された画像データを基に前記被検査物の良否判定を実行可能な良否判定手段とを備え、
前記撮像制御手段は、
前記被検査物の第1検査領域が前記ミラーを介さず合焦可能な前記撮像手段の第1合焦範囲内に位置する第1のタイミングで、該第1検査領域を前記撮像手段により撮像する第1撮像処理と、
前記第1撮像処理において前記第1合焦範囲から外れる前記被検査物の第2検査領域が前記ミラーを介して合焦可能な前記撮像手段の第2合焦範囲内に位置する第2のタイミングで、該第2検査領域を前記撮像手段により撮像する第2撮像処理とを実行可能に構成されていることを特徴とする検査装置。 - 前記第2のタイミングは、前記被検査物の搬送方向における前記ミラーの位置と同一位置に、前記被検査物の第2検査領域が位置するタイミングであることを特徴とする請求項1に記載の検査装置。
- 前記ミラーは、前記第2のタイミングにおいて、前記被検査物の第2検査領域の法線方向と平行する光路を通り前記第2検査領域から入射する光を前記光学系へ向けて反射可能に配置されていることを特徴とする請求項1又は2に記載の検査装置。
- 前記ミラーの向き及び/又は位置を調整可能なミラー調整手段を備えていることを特徴とする請求項1乃至3のいずれかに記載の検査装置。
- 前記撮像手段は、前記被検査物から入射する光を前記光学系へ向けて反射可能な第2のミラーを備え、
前記撮像制御手段は、前記被検査物の第3検査領域が前記ミラーを介して合焦可能な前記撮像手段の第3合焦範囲内に位置する第3のタイミングで、該第3検査領域を前記撮像手段により撮像する第3撮像処理を実行可能に構成されていることを特徴とする請求項1乃至4のいずれかに記載の検査装置。 - 請求項1乃至5のいずれかに記載の検査装置を備えたことを特徴とするブリスター包装機。
- 容器フィルムに成形されたポケット部に所定の内容物が収容され、該ポケット部を塞ぐようにカバーフィルムが取着されてなるブリスターパックの製造方法であって、
帯状に搬送される前記容器フィルムに対し前記ポケット部を成形するポケット部成形工程と、
前記ポケット部に前記内容物を充填する充填工程と、
前記ポケット部に前記内容物が充填された前記容器フィルムに対し、前記ポケット部を塞ぐようにして帯状の前記カバーフィルムを取着する取着工程と、
前記容器フィルムに前記カバーフィルムが取着された帯状体から前記ブリスターパックを切離す切離工程と、
前記ポケット部が成形された容器フィルムを被検査物として検査する検査工程とを備え、
前記検査工程において、
前記ポケット部が成形された容器フィルムに対し所定の光を照射する照射工程と、
像面湾曲が補正される所定の光学系と、前記容器フィルムから入射する光を前記光学系へ向けて反射可能なミラーとを有した撮像手段を用いて、前記光が照射された容器フィルムを撮像する撮像工程と、
前記撮像工程において取得された画像データを基に前記容器フィルムの良否判定を行う良否判定工程とを備え、
前記撮像工程においては、
前記容器フィルムの第1検査領域が前記ミラーを介さず合焦可能な前記撮像手段の第1合焦範囲内に位置する第1のタイミングで、該第1検査領域を前記撮像手段により撮像する第1撮像工程と、
前記第1撮像工程において前記第1合焦範囲から外れる前記容器フィルムの第2検査領域が前記ミラーを介して合焦可能な前記撮像手段の第2合焦範囲内に位置する第2のタイミングで、該第2検査領域を前記撮像手段により撮像する第2撮像工程とを備えたことを特徴とするブリスターパックの製造方法。
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CN116940832A (zh) | 2023-10-24 |
EP4321445A1 (en) | 2024-02-14 |
US20240040230A1 (en) | 2024-02-01 |
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