Inspection equipment and blister packaging machines

Abstract

To provide an inspection device and the like which can more accurately determine the quality of a punching displacement.SOLUTION: A punching displacement inspection device includes: an illumination device 41 which emits parallel light from the obliquely upper side of a long side part 1a to a PTP sheet 1; a camera 42 which images the PTP sheet 1 irradiated with the parallel light from directly above; and an image processing device 43 which performs various image processing on the basis of the image data imaged by the camera 42. The light irradiated by the illumination device 41 and the light imaged by the camera 42 are ultraviolet light with wavelengths of 200 nm or more and 390 nm or less. Therefore, even if a seal joint is provided on the PTP sheet 1, a container film general part 3a appears relatively dark on the imaged image data. This makes it easy to detect a position of a pocket part 2 and to improve quality determination accuracy for punching of the PTP sheet 1.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to an inspection device for inspecting the punching of blister sheets, and a blister packaging machine equipped with the inspection device. [Background technology]

[0002] A press-through pack (PTP) sheet is a type of blister sheet commonly used in the pharmaceutical industry. A PTP sheet comprises a container film having a pocket for storing contents such as tablets, and a cover film attached to the container film so as to seal the opening of the pocket.

[0003] The blister sheets described above can be manufactured by a blister packaging machine, which includes a means for forming pockets in a conveyed strip-shaped container film, a means for filling the pockets with contents, a means for attaching a strip-shaped cover film to the container film so as to seal the opening of the pocket, and a means for punching the strip-shaped blister film made of the container film and cover film into sheets to obtain blister sheets.

[0004] However, blister sheets manufactured in this manner may be inspected to determine whether the blister film has been properly punched, i.e., whether any punching misalignment has occurred. A known inspection device for inspecting for punching misalignment includes an irradiation means for irradiating the container film side of the blister sheet with parallel light and an imaging means for imaging the container film side of the blister sheet from directly above the blister sheet (see, for example, Patent Document 1). With this inspection device, in the image data obtained by the imaging means, areas of the container film where no pockets are formed (general container film portions) can be designated as dark areas, and root portions of the pockets that are formed to rise from the general container film portions can be designated as bright areas. This makes it possible to detect the positions of the pockets and, ultimately, to determine whether punching misalignment is acceptable. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-35185 Summary of the Invention [Problem to be solved by the invention]

[0006] In blister sheets, the container film is sometimes made of a transparent or translucent material to allow the contents to be seen, and the cover film is sometimes made of thin aluminum or the like to facilitate easy removal of the contents. Furthermore, in order to more reliably attach the cover film to the container film, a seal may be provided in which the cover film bites into the container film, corresponding to the flat general portion of the container film. The seal can be formed by attaching the cover film to the container film using an attachment means having projections and recesses.

[0007] It is conceivable to use the inspection device to inspect the above-described punching misalignment of the blister sheet. However, in this case, light incident on the container film is reflected by the seal seam, and this reflected light may be emitted toward the imaging means. Therefore, the influence of this reflected light makes it difficult to detect the position of the pocket based on the image data, which may result in an inaccurate judgment of the pass / fail of the punching misalignment.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inspection device and the like that can more accurately determine pass / fail regarding punching misalignment. [Means for solving the problem]

[0009] The following describes each of the means suitable for achieving the above object, with specific effects of the corresponding means added as necessary.

[0010] Means 1. An inspection device for inspecting blister sheets manufactured into a generally rectangular shape in plan view by punching the blister film into a sheet unit after filling a strip-shaped container film with contents and then attaching a cover film to the container film so as to close the pocket portion, and then inspecting the blister sheets manufactured into a generally rectangular shape in plan view by punching the blister film into a sheet unit, The blister sheet is formed by attaching the cover film to the container film using an attachment means having projections and recesses, and the seals formed by the cover film biting into the container film are provided in correspondence with flat general portions of the container film where the pocket portions are not formed, the container film is made of transparent or translucent polypropylene or polyvinyl chloride, and the cover film is made of aluminum, an irradiation means capable of irradiating parallel light from a predetermined side of the periphery of the blister sheet toward the container film side of the blister sheet; an imaging means capable of imaging the container film side of the blister sheet from a direction perpendicular to the container film general portion of the blister sheet; an image processing device that processes an image signal output from the imaging means, The irradiation angle of the parallel light with respect to the general portion of the container film of the blister sheet is set to a predetermined angle at which specular reflection light of the parallel light reflected by the general portion of the container film does not enter the imaging means; The image processing device includes: a pocket detection means for detecting the position of the pocket relative to the predetermined side of the blister sheet based on image data obtained from the image signal; a determining means for determining whether the blister sheet has been punched properly based on the position data of the pocket portion, The light irradiated by the irradiating means and the light captured by the imaging means are ultraviolet light having a wavelength of 200 nm or more and 390 nm or less. 、 In a predetermined cross section of the blister sheet passing through the general portion of the container film along the thickness direction of the general portion of the container film, the seal line has a triangular cross section, and the angle θ of the apex of the seal line is 90° or more and 150° or less, When the irradiation angle of the parallel light from the irradiation means to the general portion of the container film is β (°), the angle of the top of the seal is θ (°), and the refractive index of the container film is n, The irradiation angle β of the parallel light from the irradiation means to the general portion of the container film is set so as to satisfy β≠arcsin [n×sin(180°-θ)]. An inspection device characterized by:

[0011] The term "direction perpendicular to the general portion of the container film" refers to the direction perpendicular to the general portion of the container film when the blister sheet is not warped. Furthermore, the term "made of aluminum" includes not only those made of aluminum alone, but also those with aluminum as a base material, such as aluminum laminate film and aluminum foil coated with a resin sealant.

[0012] According to the above-mentioned means 1, parallel light is irradiated onto the container film side of the blister sheet from a predetermined side of the periphery of the blister sheet, and an image of the container film side of the blister sheet is taken from directly above the blister sheet.

[0013] The light emitted by the irradiating means and captured by the imaging means is ultraviolet light with a wavelength of 200 nm or more and 390 nm or less. This allows light incident on a container film made of polypropylene or polyvinyl chloride to be quickly attenuated within the container film. This prevents light reflected from the seal from being emitted toward the imaging means.

[0014] Furthermore, according to the above-mentioned means 1, the specular reflection light (specular reflection component) of the parallel light irradiated onto the general portion of the container film of the PTP sheet is set not to be incident on the imaging means. Therefore, in addition to the fact that the light reflected from the seal stitches can be prevented from being emitted to the imaging means, even if the seal stitches are provided corresponding to the general portion of the container film, the general portion of the container film can be made to appear relatively dark overall in the captured image data.

[0015] On the other hand, at the base of the pocket portion, which is formed to rise from the general portion of the container film, i.e., at the boundary between the general portion of the container film and the pocket portion, the container film is curved in an arc shape, with the inclination angle continuously changing from approximately horizontal to approximately vertical. Therefore, the parallel light irradiated on a part of the base of the pocket portion is reflected and incident on the imaging means as specularly reflected light. This makes it possible to make a part of the base of the pocket portion appear very bright in the captured image data.

[0016] Therefore, according to the above-mentioned means 1, even when a seal is provided corresponding to the general portion of the container film, image data in which the general portion of the container film is a dark portion and the base portion of the pocket is a light portion can be obtained more reliably. As a result, the position of the pocket can be detected more accurately using the image data, and ultimately, the pass / fail judgment regarding punching misalignment can be performed more accurately.

[0017] Furthermore, in the above-mentioned method 1, parallel light is used as the irradiating light, so the contrast in the image data is clearer than when diffused light etc. is used, making it easier to detect the position of the pocket.

[0018] Furthermore, since the blister sheet is imaged from directly above, the entire blister sheet can be inspected in one image, improving inspection efficiency. Also, compared to when imaging from diagonally above, the influence of the angle of view of the lens of the imaging means can be reduced. Furthermore, although light incident on the container film is rapidly attenuated within the container film, in some cases a small portion of the light reflected from the seal may be emitted directly upward from the container film. Here, such light emitted directly upward is thought to be light that is reflected from the surface of a relatively flat portion of the cover film that does not have a seal (referred to as a "non-seal portion") and then reflected again from the surface of the seal (referred to as "double-reflected light"). Here, let α (°) be the angle between a reference line parallel to the base of the triangular cross-section of the seal stitch and the light that reflects off the non-seal stitch and is incident on the surface of the seal stitch. If the angle α at which the twice-reflected light is emitted directly upward is 0° or less, the twice-reflected light will not be emitted directly upward. Considering the angle α at which the twice-reflected light is emitted directly upward, when the angle of the top of the seal stitch is θ, this angle α can be expressed as 90° - θ [= [(180° - θ) / 2] - (θ / 2)]. Therefore, by satisfying 90° ≦ θ (90° - θ ≦ 0°) as in Means 1 above, the angle α at which the twice-reflected light is emitted directly upward can be set to 0° or less, i.e., a state can be achieved in which reflected light from the non-seal stitch that would cause the twice-reflected light to be emitted directly upward cannot be generated. Furthermore, since it is possible to prevent the emission of double-reflected light directed straight up, it is possible to more accurately detect the position of the pocket using image data, and ultimately to further improve the accuracy of determining whether the punching misalignment is good or bad. Furthermore, if the angle θ is made too large, there is a risk that the effect of the seal, which is to more securely attach the cover film to the container film, will not be fully realized, but according to the above-mentioned means 1, the angle θ is set to 150° or less, so that the effect of providing the seal can be fully realized. Furthermore, even if the blister sheet to be inspected has a warp of up to 10°, it is preferable to configure it so that θ≧100° is satisfied in order to more reliably prevent the emission of twice-reflected light directed straight upward. As mentioned above, the light incident on the container film is quickly attenuated within the container film, but in some cases, a small portion of the light reflected from the seal may be emitted directly upward from the container film. Here, the light emitted directly upward may include the light reflected only from the seal (single reflection light) in addition to the double reflection light mentioned above. Here, when the refractive index of the container film is n, the irradiation angle (incident angle) of the parallel light from the irradiation means to the general portion of the container film is β (°), and the refraction angle of the light incident on the container film is γ (°), the equation 1 × sinβ = n × sinγ is satisfied. 1 is the refractive index of air. Therefore, the irradiation angle β can be expressed by the equation arcsin [n × sinγ]. On the other hand, when γ = 180° - θ is satisfied, the single-reflected light can be emitted directly upward. Therefore, it can be said that when the irradiation angle β is satisfied, the single-reflected light can be emitted directly upward when β = arcsin [n × sin(180° - θ)] is satisfied. In this regard, according to the above-mentioned method 1, the irradiation angle β of the parallel light from the irradiation means to the general portion of the container film is set so as to satisfy β≠arcsin [n×sin(180°-θ)]. In other words, the irradiation angle β is set so as not to satisfy the condition that the emission of the single-reflected light directed straight up occurs. Therefore, the emission of the single-reflected light directed straight up can be more reliably prevented, and the position of the pocket portion can be detected more accurately. As a result, the accuracy of the pass / fail judgment regarding the punching deviation can be more effectively improved. The "irradiation angle of the parallel light from the irradiation means to the general portion of the container film" refers to the irradiation angle when the blister sheet is not warped.

[0019] Means 2: The inspection device according to Means 1, characterized in that the light irradiated by the irradiating means and the light captured by the imaging means are ultraviolet light having a wavelength of 200 nm or more and 280 nm or less.

[0020] According to the above-mentioned method 2, light incident on the container film can be attenuated more quickly within the container film. This makes it possible to more reliably make the general portion of the container film relatively dark, even when a seal is provided corresponding to the general portion of the container film. As a result, it becomes possible to more accurately detect the position of the pocket using image data, and the accuracy of the pass / fail judgment regarding punching misalignment can be further improved.

[0021] Means 3: The inspection device according to Means 1, characterized in that the angle of the parallel light emitted from the irradiating means to the general portion of the container film is set to 25° or more and less than 80°.

[0023] According to the above-mentioned means 3, the irradiation angle (incident angle) of the parallel light from the irradiation means to the general portion of the container film is set to 25° or more. Therefore, even if the blister sheet to be inspected has a warp of up to about 10°, it is possible to more reliably set the imaging means so that the specular reflection light (specular reflection component) of the parallel light reflected by the general portion of the container film is not incident on the imaging means.

[0024] On the other hand, according to the above-mentioned method 3, the angle of the parallel light emitted from the irradiation means to the general portion of the container film is set to less than 80°. Therefore, even if the blister sheet to be inspected has a warp of up to about 10°, the light emitted from the irradiation means toward the base of the pocket portion is not blocked by the edge of the blister sheet. This makes it possible to more reliably obtain good pass / fail judgment accuracy regarding punching misalignment.

[0035] Means 6: A blister sheet is formed by attaching a cover film made of aluminum to a strip-shaped container film made of transparent or translucent polypropylene or polyvinyl chloride and having pockets formed therein, and an attachment means for forming seals by the cover film biting into the container film in correspondence with the flat general portion of the container film where the pockets are not formed; a punching means for punching the blister film into sheets to obtain blister sheets having a substantially rectangular shape in plan view; A blister packaging machine comprising the inspection device according to means 1 for determining whether the blister sheet obtained by the punching means has been punched properly.

[0036] According to the sixth means, the same effects as those of the first means can be achieved.

[0037] means 5 . The attachment means is capable of forming the seal in a predetermined cross section of the blister sheet passing through the general portion of the container film along the thickness direction of the general portion of the container film, the seal having a triangular cross section and an apex angle θ of 90° or more and 150° or less; and The blister packaging machine according to means 4, characterized in that it is configured to be able to form the seal that satisfies β≠arcsin[n×sin(180°-θ)].

[0038] The above means 5 According to the above means1 The same effect is achieved.

[0041] The technical matters relating to the above means may be combined as appropriate. 。 [Brief explanation of the drawings]

[0042] [Figure 1] FIG. 2 is a perspective view showing a PTP sheet. [Figure 2] FIG. 1 is a partially enlarged cross-sectional view of a PTP sheet. [Figure 3] FIG. 1 is a perspective view showing a PTP film. [Figure 4] FIG. 2 is a perspective schematic diagram showing the PTP sheet as viewed from the cover film side and the seal lines provided on the PTP sheet. [Figure 5] FIG. 2 is an enlarged cross-sectional view of a PTP sheet showing the depth of the seal and other details. [Figure 6] FIG. 1 is a schematic diagram showing the general configuration of a PTP packaging machine. [Figure 7] FIG. 2 is a perspective schematic view showing a protruding portion provided on the surface of a heating roll. [Figure 8] FIG. 2 is a schematic plan view illustrating the configuration of a punching misalignment inspection device. [Figure 9] FIG. 2 is a schematic front view illustrating the configuration of the punching misalignment inspection device. [Figure 10] FIG. 2 is a block diagram showing the electrical configuration of the punching misalignment inspection device. [Figure 11] 10 is a flowchart showing an inspection process executed by the image processing device. [Figure 12] 10 is an explanatory diagram showing a luminance image obtained by capturing an image of a PTP sheet and brightness along the JJ line. [Figure 13] FIG. 1 is an enlarged cross-sectional schematic diagram of a PTP sheet for explaining single-reflected light and double-reflected light. [Figure 14] FIG. 2 is an enlarged cross-sectional schematic diagram of a PTP sheet for explaining the reason why the angle of the top is set to 90° or more. [Figure 15]FIG. 1 is an enlarged cross-sectional schematic diagram of a PTP sheet for explaining the reason for setting the irradiation angle β so as to satisfy β≠arcsin[n×sin(180°−θ)]. [Figure 16] FIG. 1 is a side view showing a warped PTP sheet. DETAILED DESCRIPTION OF THE INVENTION

[0043] An embodiment will be described below with reference to the drawings. First, the structure of the PTP sheet as the "blister sheet" to be inspected will be described in detail.

[0044] As shown in FIGS. 1 and 2, the PTP sheet 1 has a container film 3 with a plurality of pocket portions 2, and a cover film 4 attached to the container film 3 so as to cover the pocket portions 2.

[0045] The container film 3 is made of transparent or translucent polypropylene (PP) or polyvinyl chloride (PVC) and has optical transparency. The container film 3 has a predetermined thickness T (see FIG. 5), which is, for example, 120 μm or more and 300 μm or less.

[0046] The container film 3 also has a flat general container film portion 3a where the pocket portion 2 is not formed. The general container film portion 3a is the portion to which the cover film 4 is attached. The pocket portion 2 has a root portion 2a formed to rise from the general container film portion 3a. At the root portion 2a, the container film 3 is curved in an arc shape, and the inclination angle of the root portion 2a changes continuously from a substantially horizontal direction to a substantially vertical direction.

[0047] On the other hand, the cover film 4 is made of thin aluminum (aluminum foil) (for example, about 15 to 20 μm). In this embodiment, the cover film 4 is made of aluminum foil or the like with a sealant made of a predetermined resin or the like applied to its surface. The cover film 4 may also be made of an aluminum laminate film or the like.

[0048] In this embodiment, the reflectance of the surface of the cover film 4 that is attached to the container film 3 is 60% or more. Reflectance is the ratio of the radiant flux of reflected light to the radiant flux of light irradiating an object, and refers to total reflectance. If a printed portion is provided on the cover film 4, the reflectance refers to the portion where the printed portion is not provided. The reflectance here refers to the reflectance before attachment to the container film 3.

[0049] The PTP sheet 1 is formed in a generally rectangular shape in plan view. The PTP sheet 1 has two pocket rows formed in the direction of the short side 1b, each row consisting of five pockets 2 arranged along the long side 1a. In other words, a total of ten pockets 2 are formed. Each pocket 2 contains one tablet 5 as the "contents."

[0050] 4 and 5, the PTP sheet 1 has a plurality of convex seals 4a formed by the cover film 4 being dug into the container film 3, corresponding to the general container film portion 3a. The seals 4a are intended to more securely attach the cover film 4 to the container film 3. In this embodiment, the plurality of seals 4a are arranged in a parallelogram-like mesh pattern. Note that the seals 4a are not shown in Figures 1 and 2, etc.

[0051] Additionally, in a predetermined cross section of the PTP sheet 1 passing through the container film general portion 3a along the thickness direction of the container film general portion 3a, the seal 4a has a triangular cross section. In this cross section, the angle θ of the apex of the seal 4a is 90° or more and 150° or less. In this embodiment, the "predetermined cross section" refers to a cross section along a direction perpendicular to the extension direction of the seal 4a.

[0052] The number of parallel seal lines 4a is 8 to 13 per 10 mm. The depth D of the seal lines 4a is 0.05 mm to 0.2 mm (50 μm to 200 μm).

[0053] The seal 4a may be a dot-like projection instead of a ridge, that is, a plurality of seals 4a may be provided in a scattered manner.

[0054] The PTP sheet 1 is produced by punching out 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 sheet. In this embodiment, the PTP film 6 corresponds to a "blister film."

[0055] Next, an outline of the PTP packaging machine 8 for producing the PTP sheet 1 will be described.

[0056] As shown in FIG. 6, a roll of container film 3 is disposed on the most upstream side of PTP packaging machine 8, and container film 3 is intermittently conveyed from here.

[0057] Downstream of this, a heating device 12 and a pocket forming device 13 are arranged in this order along the transport path of the container film 3. The heating device 12 and the pocket forming device 13 form the pocket 2.

[0058] A filling device 16 is disposed downstream of the pocket forming device 13, which fills the pockets 2 of the container film 3 with tablets 5. Furthermore, a tablet inspection device 17 is disposed downstream of the filling device 16. The tablet inspection device 17 inspects whether the tablets 5 have been reliably filled into each pocket 2, whether there are any abnormalities in the tablets 5, whether there is any foreign matter mixed in, etc.

[0059] Meanwhile, the pull-out end of the original roll of cover film 4 wound into a roll is guided toward film receiving roll 18. A heating roll 19 can be pressed against film receiving roll 18. Then, the container film 3 and cover film 4 pass between both rolls 18, 19 in a heated and pressed state, thereby attaching the cover film 4 to the container film 3. In this manner, a PTP film 6 is produced in which tablets 5 are filled in each pocket portion 2. In this embodiment, the film receiving roll 18 and heating roll 19 constitute an "attaching means."

[0060] In this embodiment, the surface of the heating roll 19 that faces the cover film 4 passing between the rolls 18, 19 has irregularities for forming the seals 4a. More specifically, the surface of the heating roll 19 that faces the cover film 4 passing between the rolls 18, 19 has a plurality of angular (triangular cross-sectional) protruding ridges 19a (see FIG. 7). The ridges 19a are arranged to form a parallelogram mesh. The films 3, 4 passing through the rolls 18, 19 are pressed by the ridges 19a, thereby forming the seals 4a in the PTP film 6 produced.

[0061] The heating roll 19 is configured to be able to form a seal 4a having a triangular cross section and an apex angle θ of 90° or more and 150° or less in a predetermined cross section of the PTP sheet 1 passing through the container film general portion 3a along the thickness direction of the container film general portion 3a. In this embodiment, the shape of the protruding ridge portion 19a is appropriately set to form the seal 4a described above.

[0062] A slit forming device 22 and a marking device 23 are arranged in this order downstream of the film receiving roll 18. The slit forming device 22 has a function of forming a separation slit (not shown) at a predetermined position on the PTP film 6. The marking device 23 has a function of applying a mark (not shown) indicating identification information such as a lot number at a predetermined position on the PTP film 6.

[0063] Furthermore, a sheet punching device 24 is provided downstream of the marking device 23. The sheet punching device 24 functions as a "punching means" that punches the PTP film 6 into individual PTP sheets.

[0064] A scrap hopper 26 for storing scrap material 25 from the sheet punching device 24 is provided downstream of the sheet punching device 24 .

[0065] In addition, a conveyor 28 for transporting the punched PTP sheets 1 is provided below the sheet punching device 24. The punched PTP sheets 1 are transported by the conveyor 28 toward downstream accumulation means (not shown) with the pocket portions 2 facing upward.

[0066] In the stacking means, for example, a set of two PTP sheets 1 is set with the pocket portions 2 facing each other, and then multiple sets of PTP sheets 1 are stacked and piled up. Thereafter, the PTP sheets 1 are guided to a banding process and a bag-making process, and finally packed into boxes.

[0067] A punching misalignment inspection device 40 is provided on the conveyor 28 that transports the PTP sheets 1 punched by the sheet punching device 24 to inspect whether the PTP sheets 1 have been punched properly. In this embodiment, the punching misalignment inspection device 40 constitutes the "inspection device." If a PTP sheet 1 is determined to be defective by the tablet inspection device 17 or the punching misalignment inspection device 40, the PTP sheet 1 determined to be defective is separately discharged by a defective sheet discharge mechanism (not shown).

[0068] The outline of the PTP packaging machine 8 has been described above, but the configuration of the punching deviation inspection device 40 will be described in more detail below with reference to FIGS.

[0069] 8 to 10, the punching misalignment inspection device 40 includes an illumination device 41 for irradiating a predetermined light onto the PTP sheet 1, a camera 42 for capturing an image of the PTP sheet 1 irradiated with light, an image processing device 43 for performing various image processing based on image data captured by the camera 42, a monitor 44 as output means, and a keyboard 45 as input means. In this embodiment, the illumination device 41 constitutes the "irradiation means" and the camera 42 constitutes the "imaging means."

[0070] The lighting device 41 includes a first lighting device 41a and a second lighting device 41b that are provided at a predetermined interval in the conveying direction X of the PTP sheet 1 that is conveyed horizontally by the conveyor 28 (see FIG. 8). The PTP sheet 1 is conveyed on the conveyor 28 with its short side 1b extending substantially along the conveying direction X and its long side 1a extending substantially along a direction perpendicular to the conveying direction X. Correspondingly, the lighting devices 41a and 41b are disposed parallel to the direction perpendicular to the conveying direction X of the PTP sheet 1 (see FIG. 8). The lighting devices 41a and 41b irradiate the PTP sheet 1 with light from diagonally above the long side 1a of the PTP sheet 1.

[0071] In addition, both lighting devices 41a and 41b include an LED mounting substrate 60. A large number of LEDs capable of emitting ultraviolet light are arranged on the LED mounting substrate 60 (not shown). The light emitted from the lighting device 41 is ultraviolet light having a wavelength of 200 nm or more and 390 nm or less. In this embodiment in particular, the light emitted from the lighting device 41 is ultraviolet light having a wavelength of 200 nm or more and 280 nm or less.

[0072] Furthermore, a prism film 61 is provided in parallel with the LED mounting substrate 60. The prism film 61 has an incident surface 61a facing the LED mounting substrate 60 and an exit surface 61b located on the opposite side (the PTP sheet 1 side).

[0073] The incident surface 61a is formed flat, while the exit surface 61b has a plurality of ridges 61c with triangular cross sections arranged in a predetermined direction. This allows the prism film 61 to receive light from the LED mounting substrate 60 through the incident surface 61a and emit only parallel light from the exit surface 61b. As a result, only parallel light is irradiated onto the PTP sheet 1. Note that other configurations capable of irradiating parallel light (approximately parallel light) without using the prism film 61 may also be employed.

[0074] In addition, the irradiation angle x of the parallel light from each of the lights 41a, 41b onto the general container film portion 3a of the PTP sheet 1 is set to an angle such that the specular reflection of the parallel light reflected by the general container film portion 3a does not enter the camera 42. As a result, the specular reflection of the parallel light (the specular reflection component of the reflected light) reflected by the general container film portion 3a does not enter the camera 42. On the other hand, the specular reflection of the parallel light reflected by a predetermined portion of the PTP sheet 1, such as the base portion 2a of the pocket portion 2, enters the camera 42. As a result, luminance image data is acquired in which a portion of the base portion 2a of the pocket portion 2 appears very bright. Note that the irradiation angle x refers to the irradiation angle when there is no warping in the PTP sheet 1 (general container film portion 3a).

[0075] In this embodiment, the irradiation angle x is set to be equal to or greater than 25° and less than 80°. By setting the irradiation angle x to be equal to or greater than 25°, it is possible to more reliably realize a configuration in which the specular reflection light (specular reflection component) of the parallel light reflected by the general container film portion 3a is not incident on the camera 42, even if the PTP sheet 1 to be inspected has a warp of up to about 10° (see FIG. 16).

[0076] On the other hand, by setting the irradiation angle x to less than 80°, even if the PTP sheet 1 to be inspected has a warp of up to approximately 10°, it is possible to more reliably prevent the light irradiated from the lights 41a, 41b toward the base portion 2a of the pocket portion 2 from being blocked by the edge portion of the PTP sheet 1 (in this embodiment, the long side portion 1a).

[0077] Furthermore, as described above, in a given cross section of the PTP sheet 1 passing through the container film general portion 3a along the thickness direction of the container film general portion 3a, the seal seam 4a has a triangular cross section. When the angle of irradiation of parallel light with respect to the container film general portion 3a in the cross section is β (°) and the refractive index of the container film 3 is n, the irradiation angle β is set so that β ≠ arcsin [n × sin(180°-θ)] is satisfied in the cross section. The refractive index n is approximately 1.48 when the container film 3 is made of PP, and approximately 1.52 when the container film 3 is made of PVC. However, if the value of [n × sin(180°-θ)] exceeds 1, the irradiation angle β is not set based on the arcsin [n × sin(180°-θ)] formula.

[0078] In this embodiment, the irradiation angle β is set so as to satisfy β≠arcsin[n×sin(180°-θ)] by adjusting the relative position of the lighting device 41 with respect to the PTP sheet 1 to be inspected. On the other hand, if it is impossible or difficult to change the irradiation angle β by adjusting the relative position of the lighting device 41, the shape of the convex rib portion 19a may be adjusted so that the heating roll 19 forms seal stitches 4a that satisfy β≠arcsin[n×sin(180°-θ)].

[0079] Furthermore, both lighting devices 41a and 41b are provided with a first polarizing filter 62 on the exit surface 61b side of the prism film 61, and are configured to irradiate only parallel light of a predetermined polarization component onto the PTP sheet 1 through the first polarizing filter 62.

[0080] The parallel light irradiated onto the PTP sheet 1 may be incident on the container film 3. Therefore, it is conceivable that the incident parallel light may be reflected off the seal seam 4a and reach the camera 42. However, since the parallel light irradiated from the lights 41a and 41b is ultraviolet light as described above, the incident light is quickly attenuated within the container film 3. Therefore, it is unlikely that the parallel light incident on the container film 3 may be reflected off the seal seam 4a and reach the camera 42.

[0081] The camera 42 is composed of a CCD camera or CMOS camera that is sensitive to at least ultraviolet light, and is positioned vertically above the conveyor 28. The camera 42 captures an image of the entire PTP sheet 1 to be inspected, positioned on the conveyor 28, from a direction perpendicular to the general container film portion 3a of the PTP sheet 1 (in this embodiment, a direction perpendicular to the upper surface of the conveyor 28). The luminance image data captured by the camera 42 is input to an image processing device 43. Note that the "direction perpendicular to the general container film portion 3a" refers to the direction perpendicular to the general container film portion 3a when the PTP sheet 1 is not warped.

[0082] Furthermore, the camera 42 is equipped with a second polarizing filter 63, and captures an image of the PTP sheet 1 through the second polarizing filter 63. In this embodiment, the polarization direction of the first polarizing filter 62 and the polarization direction of the second polarizing filter 63 are the same. This makes it possible to prevent diffuse reflection light (diffuse reflection component) of parallel light reflected by the PTP sheet 1 from being incident on the camera 42. Note that the polarizing filters 62 and 63 may be omitted.

[0083] The image processing device 43 is composed of an A / D converter 47, shading correction means 48, binarization means 49, first image memory 50, second image memory 53, judgment memory 54, CPU and input / output interface 55, inspection result and statistical data memory 56, camera timing control means 57, etc., and is capable of performing various image processing and punching misalignment inspection, etc.

[0084] The A / D converter 47 converts the luminance image data obtained by capturing an image with the camera 42 from an analog signal to a digital signal. The A / D converted luminance image data is subjected to shading correction by a shading correction means 48, and then stored in a first image memory 50.

[0085] The corrected luminance image data is binarized by binarization means 49 based on a preset luminance threshold δ1, and then sequentially stored in second image memory 53. The luminance threshold δ1 is set to a relatively high luminance value so that only specularly reflected parallel light reflected from the base 2a of the pocket 2 can be easily detected.

[0086] The judgment memory 54 stores various information related to pass / fail judgment, such as the reference values ​​for pass / fail judgment, etc. The information stored in the judgment memory 54 can be corrected or changed using the keyboard 45.

[0087] The CPU and input / output interface 55 has a function to execute a pass / fail judgment program while using the stored contents of the judgment memory 54, and a function to send and receive various signals to and from the PTP packaging machine 8. By sending and receiving signals to and from the PTP packaging machine 8, it is possible to control, for example, the defective sheet discharge mechanism of the PTP packaging machine 8. The CPU and input / output interface 55 also has a function to send display data to the monitor 44. This function allows various image data, inspection results, and the like to be displayed on the monitor 44.

[0088] The inspection result and statistical data memory 56 stores data such as coordinates relating to various image data, inspection result data, and statistical data obtained by stochastically processing the inspection result data. These inspection result data and statistical data can be displayed on the monitor 44 under the control of the CPU and input / output interface 55. In addition, the CPU and input / output interface 55 can also send control signals to the PTP packaging machine 8 based on these inspection result data and statistical data.

[0089] The camera timing control means 57 controls the timing at which the brightness image data obtained by the camera 42 is input to the A / D converter 47. This timing is controlled based on a signal from an encoder or a signal from a sensor (not shown) provided in the PTP packaging machine 8, and the camera 42 captures an image of each sheet every time a predetermined amount of PTP sheet 1 is fed.

[0090] Next, the inspection process for punching misalignment of the PTP sheet 1 will be described with reference to the flowchart of FIG.

[0091] First, in step S1, parallel light is irradiated onto the PTP sheet 1 to be inspected from each of the illumination devices 41a and 41b, and the PTP sheet 1 irradiated with the parallel light is imaged by the camera 42 (image capturing process). As a result, luminance image data of the PTP sheet 1 is acquired.

[0092] The acquired luminance image data is converted into a digital signal by the A / D converter 47 as described above, and then shading-corrected by the shading correction means 48 and stored in the first image memory 50.

[0093] At this time, the camera 42 captures the specularly reflected parallel light reflected at specific locations, such as the long side 1a of the PTP sheet 1, the base 2a of the pocket portion 2, the periphery of the ceiling of the pocket portion 2 of the PTP sheet 1, and the periphery of the surface of the tablet 5, and obtains brightness image data in which these locations appear much brighter than other locations (see PTP sheet 1 in Figure 12).

[0094] As described above, it is unlikely that the parallel light incident on the container film 3 will be reflected by the seal seam 4a and reach the camera 42. Therefore, the seal seam 4a can be prevented from appearing as a bright area in the acquired brightness image data. As a result, the position and shape of the base portion 2a are more clearly shown in the brightness image data.

[0095] Once the luminance image data has been acquired, in step S2, the binarization means 49 forms binary image data, and the data is stored in the second image memory 53 (binarization process). More specifically, the luminance image data is converted into binary image data, with values ​​equal to or greater than the luminance threshold δ1 being 1 (bright) and values ​​less than the luminance threshold δ1 being 0 (dark) (see the graph relating to brightness at the bottom of Figure 12). In other words, binary image data is acquired in which the long side portion 1a of the PTP sheet 1, the base portion 2a of the pocket portion 2, the ceiling edge of the pocket portion 2 of the PTP sheet 1, the surface edge of the tablet 5, etc. are 1 (bright), and the container film general portion 3a of the PTP sheet 1 and the ceiling portion of the pocket portion 2 are 0 (dark).

[0096] Next, in step S3, block processing is performed on the binary image data stored in the second image memory 53. Block processing includes a process for identifying each connected component for 0 (dark) and 1 (light) in the binary image data, and a labeling process for labeling each connected component. Here, the area occupied by each identified connected component is expressed as the number of dots corresponding to the pixels of the camera 42.

[0097] Next, in step S4, a process for detecting the position of the pocket portion 2 is performed. In this position detection process, the distances Lx1, Lx2 (see FIG. 12) from the long side 1a of the PTP sheet 1 to the predetermined pocket portion 2 are calculated based on the binarized image data, thereby detecting the position of the pocket portion 2 relative to the predetermined side of the PTP sheet 1. In this embodiment, the long side 1a corresponds to the "predetermined side" that serves as the reference for detecting the position of the pocket portion 2.

[0098] In this embodiment, distances Lx1 and Lx2 are calculated for each of the two pockets 2 located at both ends of each row of pockets arranged along the long side 1a of the PTP sheet 1, for a total of four pockets 2. In calculating the distances Lx1 and Lx2, the connected components located on the outermost left and right sides in the direction of the short side 1b of the PTP sheet 1 are regarded as the connected components of the long side 1a of the PTP sheet 1, and the connected component located one step further inward is regarded as the connected component of the root portion 2a of the pocket 2, and the distance between these two connected components is calculated as the distances Lx1 and Lx2. In this embodiment, the "pocket detection means" is made up of the image processing device 43 that executes the binarization process of step S2, the block processing of step S3, and the position detection process of step S4.

[0099] In step S5, it is determined whether the calculated distances Lx1 and Lx2 are within an appropriate range using the information stored in the determination memory 54. In this embodiment, the image processing device 43 that executes this determination constitutes a "determination means."

[0100] If the distances Lx1 and Lx2 are within the appropriate range, the process proceeds to step S6, where a non-defective product is determined, and the inspection process ends. On the other hand, if the distances Lx1 and Lx2 are not within the appropriate range, the process proceeds to step S7, where a defective product is determined, and the inspection process ends.

[0101] The above inspection process is performed on all four pocket portions 2 on one PTP sheet 1. If any one of the four pocket portions 2 is determined to be defective in terms of the distances Lx1, Lx2 from the long side portion 1a of the PTP sheet 1, the PTP sheet 1 is determined to be defective.

[0102] As described above in detail, in this embodiment, the light emitted by the lighting device 41 and the light captured by the camera 42 are ultraviolet light with a wavelength of 200 nm or more and 390 nm or less. Therefore, light incident on the container film 3 made of PP or PVC can be quickly attenuated within the container film 3. This prevents light reflected by the seal 4a from being emitted toward the camera 42.

[0103] In particular, in this embodiment, the light emitted by the lighting device 41 and the light captured by the camera 42 are ultraviolet light having a wavelength of 200 nm or more and 280 nm or less. Therefore, it is possible to more effectively prevent light reflected by the seal stitch 4a from being emitted toward the camera 42.

[0104] Furthermore, the device is configured so that specularly reflected light (specular reflection component) of the parallel light irradiated onto the container film general portion 3a of the PTP sheet 1 is not incident on the camera 42. Therefore, in addition to the fact that light reflected from the seal stitches 4a can be prevented from being emitted toward the camera 42, even when the seal stitches 4a are provided corresponding to the container film general portion 3a, the container film general portion 3a can be made to appear relatively dark overall in the captured image data.

[0105] On the other hand, the reflected light of the parallel light irradiated onto a part of the base portion 2a of the pocket portion 2 is incident as specularly reflected light on the camera 42. As a result, the part of the base portion 2a of the pocket portion 2 can be made to appear very bright in the captured image data.

[0106] Therefore, according to this embodiment, even when the seal 4a is provided corresponding to the general portion 3a of the container film, it is possible to more reliably obtain image data in which the general portion 3a of the container film is a dark portion and the base portion 2a of the pocket portion 2 is a light portion. As a result, the position of the pocket portion 2 can be detected more accurately using the image data, and therefore it is possible to more accurately determine whether the punching misalignment is good or bad.

[0107] In addition, because parallel light is used as the irradiating light, the contrast between light and dark in the image data is clearer than when diffused light etc. is used, making it easier to detect the position of the pocket 2.

[0108] Furthermore, since the PTP sheet 1 is imaged from directly above, the entire PTP sheet 1 can be inspected in one image, improving inspection efficiency. Also, compared to when imaging from diagonally above, the influence of the angle of view of the lens of the camera 42, etc. can be reduced.

[0109] In addition, since the irradiation angle x is set to 25° or more, even if the PTP sheet 1 to be inspected has a warp of up to 10°, it is possible to more reliably set the camera 42 so that the specular reflection light (specular reflection component) of the parallel light reflected by the general container film portion 3a does not enter the camera 42.

[0110] On the other hand, the irradiation angle x is set to less than 80°. Therefore, even if the PTP sheet 1 to be inspected has a warp of up to about 10°, the light irradiated from the lighting device 41 toward the base portion 2a of the pocket portion 2 is not blocked by the edge portion (long side portion 1a in this embodiment) of the PTP sheet 1. This makes it possible to more reliably obtain good pass / fail judgment accuracy regarding punching misalignment.

[0111] Furthermore, since the angle θ is set to 90° or more, the position of the pocket portion 2 can be detected more accurately using image data, and the accuracy of determining whether the punching misalignment is good or bad can be further improved.

[0112] Here, we will explain in more detail why the above-mentioned effects can be obtained by setting the angle θ to 90° or more. As mentioned above, light incident on the container film 3 is quickly attenuated within the container film 3, but in some cases, a small portion of the light reflected from the seal 4a may be emitted directly upward from the container film 3. This light emitted directly upward is thought to be light that reflects off the surface of a portion of the cover film 4 where the seal 4a is not formed (referred to as the "non-seal region") and then reflects again from the surface of the seal (hereinafter referred to as "double-reflected light L2") (see Figure 13). Note that in Figures 13 to 15, hatching of the container film 3 is omitted for ease of illustration.

[0113] As shown in FIG. 14, when the angle α (°) of light reflected from a non-sealed portion and incident on the surface of the seal portion is defined as α, the angle α at which the twice-reflected light L2 is emitted directly upward is 0° or less. Therefore, when the angle α at which the twice-reflected light L2 is emitted directly upward is θ, this angle α can be expressed as 90°-θ [= [(180°-θ) / 2] - (θ / 2)]. Therefore, by satisfying 90°-θ(=α)≦0°, i.e., satisfying 90°≦θ, the angle α at which the twice-reflected light L2 is emitted directly upward can be set to 0° or less. This means that no light is reflected from a non-sealed portion that would cause the twice-reflected light L2 to be emitted directly upward. Therefore, by setting the angle θ to 90° or more, it becomes possible to more effectively suppress the light reflected by the seal stitch 4a from being emitted toward the camera 42, thereby achieving the above-mentioned effects.

[0114] Furthermore, even if the PTP sheet 1 to be inspected has a warp of up to 10°, it is preferable to configure it so that θ≧100° is satisfied in order to more reliably prevent the emission of the twice-reflected light L2 directed directly upward.

[0115] Furthermore, the angle θ is set to 150° or less, which allows the seal to fully exert its effect of more securely attaching the cover film to the container film.

[0116] In addition, the irradiation angle β is set so as to satisfy the condition β≠arcsin [n×sin(180°-θ)]. Therefore, the position of the pocket 2 can be detected more accurately, and the accuracy of pass / fail judgment regarding punching misalignment can be more effectively improved.

[0117] Here, the above-mentioned effects are achieved by setting the irradiation angle β in this way. As mentioned above, in some cases, a small portion of the light reflected by the seal 4a may be emitted directly upward from the container film 3. This light emitted directly upward may include the above-mentioned twice-reflected light L2 as well as light reflected only by the seal 4a (hereinafter referred to as "single-reflected light L1") (see FIG. 13).

[0118] Here, when the irradiation angle of the parallel light from the lighting 41a, 51b to the container film general portion 3a is β (°), the refractive index of the container film 3 is n, and the refraction angle of the light incident on the container film 3 is γ (°) (see Figure 15), the equation 1 × sinβ = n × sinγ is satisfied, where 1 is the refractive index of air. Therefore, the irradiation angle β can be expressed by the equation arcsin [n × sinγ].

[0119] On the other hand, as shown in FIG. 15, when γ = 180° - θ is satisfied, the single-reflected light L1 may be emitted directly upward. Therefore, when the irradiation angle β satisfies β = arcsin [n × sin(180° - θ)], the single-reflected light L1 may be emitted directly upward. In other words, if the irradiation angle β is set so that β ≠ arcsin [n × sin(180° - θ)] is satisfied, the condition for the single-reflected light L1 to be emitted directly upward is not satisfied. Therefore, by setting the irradiation angle β so that β ≠ arcsin [n × sin(180° - θ)] is satisfied, the single-reflected light L1 can be more reliably prevented from being emitted directly upward, and the light reflected by the seal stitch 4a can be more effectively prevented from being emitted toward the camera 42. As a result, the above-described advantageous effects are achieved.

[0120] In order to further improve the accuracy of pass / fail judgment, it is preferable that the irradiation angle β differs from the angle calculated by the formula arcsin [n × sin(180°-θ)] by 5° or more, and more preferably by 10° or more.

[0121] The present invention is not limited to the above-described embodiment, and may be implemented as follows: Of course, other applications and modifications not exemplified below are also possible.

[0122] (a) In the above embodiment, the contents are specifically described as tablets 5, but the type, shape, etc. of the contents are not particularly limited, and the contents may be something other than tablets 5, such as food or electronic components.

[0123] (b) In the above embodiment, the pocket portion 2 is generally circular in plan view and has a flat ceiling, but the configuration of the pocket portion 2 is not limited to that in the above embodiment. For example, the pocket portion 2 may be generally elliptical, oval, or diamond-shaped in plan view, or the ceiling of the pocket portion 2 may be configured to be generally hemispherical.

[0124] (c) In the above embodiment, lighting devices 41a and 41b are provided corresponding to the two long side portions 1a of the PTP sheet 1, respectively, and parallel light is irradiated onto the PTP sheet 1 from two directions to inspect the punching misalignment in the direction of the short side portion 1b of the PTP sheet 1.

[0125] Without being limited to this, for example, a configuration may be adopted in which lighting corresponding to only one of the two long side portions 1a of the PTP sheet 1 is provided, parallel light is irradiated onto the PTP sheet 1 from one direction, and punching misalignment inspection in the direction of the short side portion 1b of the PTP sheet 1 is performed.

[0126] Alternatively, a configuration may be adopted in which lighting is provided corresponding to each of the two long side portions 1a and two short side portions 1b of the PTP sheet 1, and parallel light is irradiated onto the PTP sheet 1 from four directions to inspect for punching misalignment in the long side portion 1a direction and the short side portion 1b direction of the PTP sheet 1. In this configuration, both the long side portion 1a and the short side portion 1b correspond to the "predetermined side" that serves as the reference for detecting the position of the pocket portion 2.

[0127] (d) In the above embodiment, the distances Lx1 and Lx2 from the long side 1a of the PTP sheet 1 to the base 2a of the pocket 2 are calculated, and the quality of punching of the PTP sheet 1 is inspected based on whether or not this distance is within an appropriate range. However, the inspection method is not limited to this, and other methods may be employed. For example, the positional relationship between the long side 1a of the PTP sheet 1 and the base 2a of the pocket 2 may be grasped, and the quality of punching of the PTP sheet 1 may be inspected by pattern matching or the like.

[0128] (e) In the above embodiment, the position of the peripheral portion (long side portion 1a) of the PTP sheet 1 is detected by detecting the specularly reflected light of parallel light irradiated from the lighting device 41, similar to the position detection of the base portion 2a of the pocket portion 2, but the method of detecting the position of the peripheral portion of the PTP sheet 1 is not limited to this.

[0129] Therefore, for example, the belt member of the conveyor 28 may be made of a light-transmitting material, and a second irradiating means may be provided that irradiates the PTP sheet 1 with a predetermined light from below the conveyor 28, and the position of the peripheral edge of the PTP sheet 1 may be detected by capturing an image of the light with a camera 42. With this configuration, the peripheral edge of the PTP sheet 1 can be detected more clearly.

[0130] (f) Although not specifically mentioned in the above embodiment, the PTP sheet 1 may be imaged while being transported by the conveyor 28, or the PTP sheet 1 may be stopped and imaged.

[0131] (g) In the above embodiment, the PTP sheet 1 is cited as the "blister sheet," but the technical concept of the present invention may be applied to blister sheets other than the PTP sheet 1. [Explanation of symbols]

[0132] 1... PTP sheet (blister sheet), 1a... long side portion (predetermined side), 2... pocket portion, 2a... base portion, 3... container film, 3a... general portion of container film, 4... cover film, 5... tablet, 6... PTP film (blister film), 8... PTP packaging machine (blister packaging machine), 24... sheet punching device (punching means), 40... punching misalignment inspection device (inspection device), 41... lighting device (irradiation means), 42... camera (imaging means), 43... image processing device (pocket portion detection means, judgment means).

Claims

1. An inspection device for inspecting blister sheets manufactured into a generally rectangular shape in plan view by punching the blister film into sheets after filling a strip-shaped container film with contents and then attaching a cover film to the container film so as to close the pocket, and The blister sheet is formed by attaching the cover film to the container film using an attachment means having projections and recesses, and the seals formed by the cover film biting into the container film are provided in correspondence with flat general portions of the container film where the pocket portions are not formed, the container film is made of transparent or translucent polypropylene or polyvinyl chloride, and the cover film is made of aluminum, an irradiation means capable of irradiating parallel light from a predetermined side of the periphery of the blister sheet toward the container film side of the blister sheet; an imaging means capable of imaging the container film side of the blister sheet from a direction perpendicular to the container film general portion of the blister sheet; an image processing device that processes an image signal output from the imaging means, The angle of irradiation of the parallel light with respect to the general portion of the container film of the blister sheet is set to a predetermined angle at which specular reflection light of the parallel light reflected by the general portion of the container film does not enter the imaging means; The image processing device includes: a pocket detection means for detecting the position of the pocket relative to the predetermined side of the blister sheet based on image data obtained from the image signal; a determining means for determining whether the blister sheet has been punched properly based on the position data of the pocket portion, The light irradiated by the irradiating means and the light captured by the imaging means are ultraviolet light having a wavelength of 200 nm or more and 390 nm or less, In a predetermined cross section of the blister sheet passing through the general portion of the container film along the thickness direction of the general portion of the container film, the seal line has a triangular cross section, and the angle θ of the apex of the seal line is 90° or more and 150° or less, When the irradiation angle of the parallel light from the irradiation means to the general portion of the container film is β (°), the angle of the top of the seal is θ (°), and the refractive index of the container film is n, An inspection device characterized in that the irradiation angle β of the parallel light from the irradiation means to the general portion of the container film is set so as to satisfy β≠arcsin[n×sin(180°−θ)].

2. 2. The inspection device according to claim 1, wherein the light irradiated by the irradiating means and the light captured by the capturing means are ultraviolet light having a wavelength of 200 nm or more and 280 nm or less.

3. 2. The inspection device according to claim 1, wherein the angle of the parallel light emitted from the irradiating means to the general portion of the container film is set to be equal to or greater than 25 degrees and less than 80 degrees.

4. a blister sheet formed by attaching a cover film made of aluminum to a strip-shaped container film made of transparent or translucent polypropylene or polyvinyl chloride and having pockets formed therein, and an attachment means for forming seals by cutting the cover film into the container film in correspondence with a flat general portion of the container film in which the pockets are not formed; a punching means for punching the blister film into sheets to obtain blister sheets having a substantially rectangular shape in plan view; 2. A blister packaging machine comprising: an inspection device according to claim 1 for determining whether the blister sheet obtained by the punching means has been punched properly.

5. The attachment means is capable of forming a seal having a triangular cross section at a predetermined cross section of the blister sheet passing through the general portion of the container film along the thickness direction of the general portion of the container film, and having an apex angle θ of 90° or more and 150° or less, and 5. The blister packaging machine according to claim 4, wherein the machine is configured to be capable of forming the seal that satisfies β≠arcsin[n×sin(180°−θ)].

Images