Inspection device, packaging sheet manufacturing device, and inspection method

Abstract

Provided is an inspection device or the like that can achieve extremely excellent detection accuracy of pinholes in a bag portion. The inspection device includes at least a pair of cameras (52, 53). The pair of cameras (52, 53) photograph the bag portion (2) at least when the bag portion (2) is located at an upstream side position (R1), at an intermediate side position (R2), and at a downstream side position (R3), respectively. Thereby, a photographed image of the entire area of the bag portion (2) can be obtained more reliably, and in the obtained photographed image, the pinholes in the bag portion (2) are more clearly shown. Furthermore, by determining the presence or absence of pinholes in at least the bag portion (2) based on the photographed image, the detection accuracy of the pinholes in the bag portion (2) is extremely excellent.

Description

Technical Field

[0001] The present invention relates to an inspection device for inspecting pinholes in a container film, a packaging sheet manufacturing device having the device, and a method for inspecting a container film. Background Art

[0002] As a packaging sheet generally used in the fields of pharmaceuticals and the like, a PTP (blister packaging) sheet is known. The PTP sheet includes a container film and a cover film. The container film has a bag portion for receiving contents such as tablets, and the cover film is attached to the container film so as to seal the opening side of the bag portion.

[0003] The above-described packaging sheet can be manufactured using a packaging sheet manufacturing device. The packaging sheet manufacturing device includes a mechanism for forming a bag portion with respect to a transported strip-shaped container film; a mechanism for filling the bag portion with contents; a mechanism for attaching a strip-shaped cover film to the container film so as to seal the opening side of the bag portion; a mechanism for punching a strip-shaped packaging film composed of the container film and the cover film in units of packaging sheets; and the like.

[0004] However, sometimes the container film has holes called pinholes. When a pinhole is located in the bag portion, it may cause problems in terms of the preservation of the contents and the like. Therefore, when manufacturing a packaging sheet, after forming the bag portion, it is necessary to at least check for the presence or absence of pinholes in the bag portion.

[0005] As an inspection device for pinholes, a device including an irradiation mechanism, a imaging mechanism, and a determination mechanism (image processing mechanism) is known. The irradiation mechanism irradiates a prescribed light to a container film including the bag portion, the imaging mechanism captures the light transmitted through the container film, and the determination mechanism determines the presence or absence of a pinhole based on the captured image obtained by the imaging mechanism (for example, refer to Patent Document 1 and the like). In Patent Document 1, in order to detect pinholes with high accuracy even when the container film is transparent, ultraviolet light having a lower transmittance than visible light is used as the prescribed light.

[0006] Prior Art Documents

[0007] Patent Documents

[0008] Patent Document 1: Japanese Patent Application Laid-Open No. 2015-94694 Summary of the Invention

[0009] Problems to be Solved by the Invention

[0010] However, in the technology described in the above-mentioned Patent Document 1, a condenser lens (prismatic lens) is disposed between the container film and the imaging mechanism, and by passing light through the condenser lens, the direction of the light is converted to the direction along the optical axis direction in the imaging mechanism. Generally, however, the condenser lens (prismatic lens) is made of resin and has a low transmittance of ultraviolet light. Therefore, in the case of forming a structure in which ultraviolet light is irradiated from the irradiation mechanism, the ultraviolet light irradiated onto the container film including the bag portion is insufficient, and as a result, there is a problem that the detection accuracy of the pinholes in the bag portion cannot be sufficiently improved.

[0011] 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 make the detection accuracy of pinholes in the bag portion extremely excellent.

[0012] Technical solutions for solving the problems

[0013] Hereinafter, each technical solution suitable for solving the above object will be described item by item. In addition, unique effects will be described after the corresponding technical solutions as needed.

[0014] Technical solution 1 relates to an inspection device used when manufacturing a packaging sheet, which is formed by mounting a cover film on the above-mentioned container film in a state where the container film made of resin has a bag portion having a bottom wall portion and a side wall portion and contains contents, and closing the bag portion. The inspection device is characterized in that it includes:

[0015] An irradiation mechanism that irradiates ultraviolet light onto one surface of the container film in a stage before the contents are received in the bag portion of the transported strip-shaped container film;

[0016] An imaging mechanism that photographs the container film from the other side of the container film; and

[0017] A determination mechanism that determines at least the presence or absence of pinholes in the bag portion based on the captured image obtained by the imaging mechanism;

[0018] At least a pair of the imaging mechanisms are provided on both sides in the width direction of the container film at positions sandwiching the bag portion;

[0019] A position where at least the upstream side side wall portion located on the upstream side in the transport direction of the container film in at least the side wall portion can be photographed by a pair of the imaging mechanisms is defined as an upstream side position;

[0020] A position where at least the bottom wall portion and the front side side wall portion facing the imaging mechanism in the width direction of the container film in the side wall portion can be photographed by a pair of the imaging mechanisms is defined as an intermediate side position;

[0021] A position where at least the downstream side side wall portion located on the downstream side in the conveying direction among the above-mentioned side wall portions can be photographed by a pair of the above-mentioned camera mechanisms is defined as the downstream side position. At this time,

[0022] The pair of the above-mentioned camera mechanisms are arranged to photograph at least the bag portion when the bag portion is located at the above-mentioned upstream position, at the above-mentioned middle side position, and at the above-mentioned downstream side position respectively.

[0023] The above-mentioned determination mechanism is arranged to determine at least the presence or absence of a pinhole in the above-mentioned bag portion based on a plurality of photographed images obtained by the pair of the above-mentioned camera mechanisms and including information related to the above-mentioned downstream side side wall portion, the above-mentioned front side side wall portion, the above-mentioned upstream side side wall portion, and the above-mentioned bottom wall portion.

[0024] In addition, the "position where the above-mentioned bag portion is placed therebetween" means, in the case where a plurality of bag portions are arranged in the width direction of the container film, the "position where all the above-mentioned bag portions arranged in the width direction of the above-mentioned container film are placed therebetween" (the same applies to the following technical solution 6).

[0025] According to the above-mentioned technical solution 1, when the bag portion is located at the upstream side position, the camera mechanism photographs at least the upstream side side wall portion of the bag portion. When the bag portion is located at the middle side position, the camera mechanism photographs at least the front side side wall portion of the bag portion. When the bag portion is located at the downstream side position, the camera mechanism photographs at least the downstream side side wall portion of the bag portion. That is, when observing the container film and the camera mechanism in a direction orthogonal to the container film, the direction of the vector from the bag portion toward the camera mechanism (more specifically, the camera mechanism closer to the bag portion), that is, the traveling direction of the light from the bag portion toward the camera mechanism, is in a state closer to parallel to the thickness direction of each side wall portion (the upstream side side wall portion, the front side side wall portion, or the downstream side side wall portion) to be photographed. When the camera mechanism and each side wall portion of the bag portion are in a state closer to being directly opposed, each side wall portion to be photographed is photographed. Therefore, assuming that there is a pinhole in the side wall portion, the ultraviolet light passing through the pinhole easily reaches the camera mechanism. As a result, in the photographed image, the pinhole existing in the side wall portion is more clearly shown.

[0026] In addition, according to the above Technical Solution 1, a pair of imaging mechanisms can photograph the bottom wall portion of the bag portion located at the intermediate side position. That is, the pair of imaging mechanisms are arranged in a direction orthogonal to the container film at a position sufficiently separated from the container film. Thus, when observing the container film and the imaging mechanisms in the transport direction of the container film, the direction of the vector from the bag portion towards the imaging mechanism (more specifically, the imaging mechanism closer to the bag portion), i.e., the traveling direction of the light from the bag portion towards the imaging mechanism, is in a state closer to parallel to the thickness direction of the bottom wall portion to be photographed. When the imaging mechanism is in a state more directly facing the bottom wall portion, the bottom wall portion to be photographed is photographed. In addition, according to the above Technical Solution 1, when the bag portion is located at the intermediate side position, that is, when the bottom wall portion of the bag portion is closest to the imaging mechanism, the bottom wall portion is photographed. As a result, assuming that there is a pinhole in the bottom wall portion, the ultraviolet light passing through the pinhole can easily reach the imaging mechanism. Thus, in the captured image, the pinhole existing in the bottom wall portion appears more clearly.

[0027] In addition, according to the above Technical Solution 1, at least one pair of imaging mechanisms are arranged on both sides in the width direction of the container film at positions sandwiching the bag portion therebetween. Thus, for a part of the bag portion that cannot be photographed by one of the imaging mechanisms, it can be photographed by the other imaging mechanism. As a result, a captured image of the entire area of the bag portion can be obtained more reliably.

[0028] As described above, according to the above Technical Solution 1, a captured image of the entire area of the bag portion can be obtained more reliably, and in the obtained captured image, the pinhole existing in the bag portion can appear more clearly. As a result, the detection accuracy of the pinhole in the bag portion can be made extremely excellent.

[0029] In addition, the determination mechanism can also determine whether there is a pinhole in a portion other than the bag portion (so-called flange portion) of the container film based on the captured image. In addition, the imaging mechanisms can be arranged in only one pair as in Technical Solution 2 described later, or three or more can be arranged.

[0030] Technical Solution 2 relates to the inspection device described in Technical Solution 1, and is characterized in that only one pair of the above imaging mechanisms are provided.

[0031] According to the above Technical Solution 2, only one pair of imaging mechanisms are provided. Thus, simplification and miniaturization of the inspection device, reduction of costs involved in manufacturing and maintenance of the inspection device, etc. can be effectively achieved.

[0032] Technical Solution 3 relates to the inspection device described in Technical Solution 1 or 2, and is characterized in that a plurality of the above bag portions are arranged in parallel in the transport direction of the above container film;

[0033] The above-described inspection device is configured to capture, in a single shooting operation of the above-described imaging mechanism, the above-described bag portion located at the above upstream side position, the above-described bag portion located at the above middle side position, and the above-described bag portion located at the above downstream side position all at once.

[0034] According to the above technical solution 3, it is possible to obtain the captured images required for inspection with a smaller number of shooting times, and the inspection efficiency can be improved.

[0035] Technical solution 4 relates to the inspection device described in any one of technical solutions 1 to 3, and is characterized in that a pair of the above-described imaging mechanisms are disposed on both sides in the width direction of the above-described container film, at positions sandwiching the above-described container film therebetween.

[0036] According to the above technical solution 4, when viewing the container film and the imaging mechanism in the conveying direction of the container film, when the direction of the vector from the bag portion toward the imaging mechanism (more specifically, the imaging mechanism closer to the bag portion), that is, the traveling direction of the light from the bag portion toward the imaging mechanism, is closer to being parallel to the thickness direction of the front side side wall portion, the front side side wall portion can be captured. Therefore, when there is a pinhole in the front side side wall portion, the ultraviolet light passing through the pinhole is more likely to reach the imaging mechanism, and in the captured image, the pinhole existing in the front side bottom wall portion appears more clearly. Thus, the detection accuracy of the pinhole in the front side side wall portion can be further improved.

[0037] Technical solution 5 relates to a packaging sheet manufacturing device, characterized in that the packaging sheet manufacturing device includes the inspection device described in any one of technical solutions 1 to 4.

[0038] According to the above technical solution 5, it has the same effects as the above technical solution 1 and the like.

[0039] Technical solution 6 relates to an inspection method used in manufacturing a packaging sheet, the packaging sheet being in a state of containing contents with respect to a bag portion having a bottom wall portion and a side wall portion formed on a resin-made container film, and a cover film being attached to the above-described container film in a manner of closing the above-described bag portion. The inspection method is characterized by including:

[0040] An irradiation step in which, in this irradiation step, ultraviolet light is irradiated onto one surface of the above-described container film in a belt shape being conveyed, at a stage before the above-described bag portion of the above-described container film receives the above-described contents;

[0041] An imaging step in which, in this imaging step, on both sides in the width direction of the above-described container film, at positions sandwiching the above-described bag portion therebetween, at least a pair of imaging mechanisms are provided to capture the above-described container film from the other surface side of the above-described container film; and

[0042] A determination step, in which the presence or absence of a pinhole in the above-mentioned bag portion is determined based on the captured image obtained through the above-mentioned imaging step.

[0043] A position where at least the upstream side side wall portion located on the upstream side in the conveying direction of the container film in at least the above-mentioned side wall portion can be imaged by a pair of the above-mentioned imaging mechanisms is defined as the upstream side position.

[0044] A position where at least the front side side wall portion facing the above-mentioned imaging mechanism in the width direction of the container film in at least the above-mentioned bottom wall portion and the above-mentioned side wall portion can be imaged by a pair of the above-mentioned imaging mechanisms is defined as the middle side position.

[0045] A position where at least the downstream side side wall portion located on the downstream side in the above-mentioned conveying direction in at least the above-mentioned side wall portion can be imaged by a pair of the above-mentioned imaging mechanisms is defined as the downstream side position. At this time,

[0046] In the above-mentioned imaging step, the bag portion is imaged at least when the bag portion is located at the above-mentioned upstream side position, at the above-mentioned middle side position, and at the above-mentioned downstream side position by a pair of the above-mentioned imaging mechanisms.

[0047] In the above-mentioned determination step, the presence or absence of a pinhole in the above-mentioned bag portion is determined based on a plurality of captured images obtained through the above-mentioned imaging step, which include information related to the above-mentioned downstream side side wall portion, the above-mentioned front side side wall portion, the above-mentioned upstream side side wall portion, and the above-mentioned bottom wall portion.

[0048] According to the above-mentioned technical solution 6, the same functional effects as those of the above-mentioned technical solution 1 are achieved. Brief Description of the Drawings

[0049] Figure 1 It is a perspective view showing a PTP sheet.

[0050] Figure 2 It is a partial enlarged cross-sectional view of the bag portion of the PTP sheet.

[0051] Figure 3 It is a perspective view showing a PTP film.

[0052] Figure 4 It is a schematic view showing the general structure of a PTP packaging machine.

[0053] Figure 5 It is a block diagram showing the electrical structure of an inspection device.

[0054] Figure 6 It is a schematic view when observing the container film, the camera, etc. along a direction orthogonal to the container film.

[0055] Figure 7It is an enlarged plan view for illustrating the bag portions of the upstream side side wall portion, the front side side wall portion, and the downstream side side wall portion;

[0056] Figure 8 It is a schematic cross-sectional view along Figure 6 the J-J line in

[0057] Figure 9 It is an enlarged cross-sectional view along Figure 6 the K-K line in

[0058] Figure 10 It is a schematic view showing a part of a captured image obtained by one camera;

[0059] Figure 11 It is a schematic view showing a part of a captured image obtained by another camera;

[0060] Figure 12 It is a diagram listing the planar shooting range of the bag portion of one of the cameras;

[0061] Figure 13 It is a diagram listing the planar shooting range of the bag portion of the other camera;

[0062] Figure 14 It is a schematic view showing the part corresponding to the bag portion in the captured image obtained by one of the cameras when the bag portion is in the upstream side position;

[0063] Figure 15 It is a schematic view showing the part corresponding to the bag portion in the captured image obtained by the other camera when the bag portion is in the upstream side position;

[0064] Figure 16 It is a schematic view showing the part corresponding to the bag portion in the captured image obtained by one of the cameras when the bag portion is in the middle side position;

[0065] Figure 17 It is a schematic view showing the part corresponding to the bag portion in the captured image obtained by the other camera when the bag portion is in the middle side position;

[0066] Figure 18 It is a schematic view showing the part corresponding to the bag portion in the captured image obtained by one of the cameras when the bag portion is in the downstream side position;

[0067] Figure 19 It is a schematic view showing the part corresponding to the bag portion in the captured image obtained by the other camera when the bag portion is in the downstream side position;

[0068] Figure 20A plan view schematic diagram showing a movable camera or the like in another embodiment. Detailed Embodiment

[0069] Hereinafter, an embodiment will be described with reference to the drawings. First, the structure of the PTP sheet as a "packaging sheet" will be described.

[0070] As Figure 1 , Figure 2 shown, the PTP sheet 1 includes a container film 3 and a cover film 4. The container film 3 has a plurality of bag portions 2, and the cover film 4 is attached to the container film 3 so as to enclose the bag portions 2.

[0071] The container film 3 of the present embodiment is formed of a transparent thermoplastic resin material such as PP (polypropylene) or PVC (polyvinyl chloride), and has light transmissivity. In addition, the container film 3 extends outward from the opening-side end portion of the bag portion 2 and includes a flat flange portion 3a that is an object to which the cover film 4 is attached. In addition, the bag portion 2 includes a disk-shaped bottom wall portion 2a that is substantially parallel to the flange portion 3a, and an annular side wall portion 2b that connects the outer peripheral portion of the bottom wall portion 2a and the flange portion 3a.

[0072] On the other hand, the cover film 4 is made of an opaque material (such as aluminum foil) having a sealant made of polypropylene resin or the like provided on its surface.

[0073] The PTP sheet 1 is manufactured by punching a strip-shaped PTP film 6 (see Figure 3 ) formed of a strip-shaped container film 3 and a strip-shaped cover film 4 into a sheet shape, and the PTP sheet 1 is formed into a substantially rectangular shape in plan view.

[0074] In the PTP sheet 1, a row of bags composed of 5 bag portions 2 arranged in the longitudinal direction thereof is formed in two rows in the short side direction. That is, a total of 10 bag portions 2 are formed. In each bag portion 2, one tablet 5 as a "content" is received.

[0075] Next, an overview structure of the PTP packaging machine 10 for manufacturing the above-mentioned PTP sheet 1 will be described. In the present embodiment, the PTP packaging machine 10 corresponds to a "packaging sheet manufacturing device".

[0076] As Figure 4 shown, at the most upstream side of the PTP packaging machine 10, a raw material roll of the strip-shaped container film 3 is wound in a roll shape. The pulling end side of the container film 3 wound in a roll shape is guided to a guide roller 13. The container film 3 is hung on an intermittent transport roller 14 on the downstream side of the guide roller 13. The intermittent transport roller 14 is connected to an intermittently rotating motor and intermittently transports the container film 3.

[0077] Between the guide roller 13 and the intermittent transport roller 14, along the transport path of the container film 3, a heating device 15 and a bag portion forming device 16 are sequentially provided. Further, when the container film 3 is heated by the heating device 15 and the container film 3 becomes relatively soft, a plurality of bag portions 2 are formed at a specified position of the container film 3 by the bag portion forming device 16. The formation of the bag portions 2 is performed during the interval between the transport operations of the container film 3 by the intermittent transport roller 14. Further, the container film 3 that has passed through the bag portion forming device 16 has a plurality of (five columns in the present embodiment) columns of bag portions 2 juxtaposed in the transport direction of the container film 3 in the width direction of the container film 3.

[0078] The container film 3 sent out from the intermittent transport roller 14 is hung in the order of the tension roller 18, the guide roller 19, and the film support roller 20. Since the film support roller 20 is connected to a motor that rotates at a constant speed, the container film 3 is continuously transported at a constant speed. The tension roller 18 is in a state of stretching the container film 3 toward the side that is tensioned by the elastic force, preventing the container film 3 from being slack due to the difference in the transport operations of the intermittent transport roller 14 and the film support roller 20, and keeping the container film 3 in a tensioned state at all times.

[0079] Between the guide roller 19 and the film support roller 20, along the transport path of the container film 3, an inspection device 21, a filling device 22, and a post-filling inspection device 23 are sequentially provided.

[0080] After the bag portions 2 are formed, the inspection device 21 inspects the presence or absence of pinholes (i.e., minute holes penetrating the container film 3) in at least the bag portions 2 of the container film 3. Details of the inspection device 21 will be described later.

[0081] The filling device 22 has a function of filling the tablets 5 into the bag portions 2. The post-filling inspection device 23 performs inspections such as whether the tablets 5 are reliably received in the respective bag portions 2, whether there are any abnormalities in the tablets 5, and whether there are any foreign substances mixed in the bag portions 2.

[0082] On the other hand, the blank of the cover film 4 formed in a strip shape is wound in a roll shape on the uppermost upstream side. The leading end of the cover film 4 wound in a roll shape is guided to the heating roller 25 by the guide roller 24.

[0083] The heating roller 25 can be pressed against the above-mentioned film support roller 20, and the container film 3 and the cover film 4 are fed between the two rollers 20, 25. Further, the container film 3 and the cover film 4 pass between the two rollers 20, 25 in a heat-sealed state, whereby the cover film 4 is attached to the container film 3, and the bag portions 2 are closed by the cover film 4. Thus, a strip-shaped PTP film 6 that receives the tablets 5 in the respective bag portions 2 is manufactured.

[0084] The PTP film 6 sent out from the film support roller 20 is successively wound around the tension roller 27 and the intermittent transport roller 28. Since the intermittent transport roller 28 is connected to a motor that rotates intermittently, the PTP film 6 is transported intermittently. The tension roller 27 is in a state of stretching the PTP film 6 toward the side that is tensioned by elasticity, preventing the PTP film 6 from slackening due to the difference in the transport actions of the film support roller 20 and the intermittent transport roller 28, and keeping the PTP film 6 in a tensioned state at all times.

[0085] The PTP film 6 sent out from the intermittent feed roller 28 is successively wound around the tension roller 31 and the intermittent feed roller 32. Since the intermittent transport roller 32 is connected to a motor that rotates intermittently, the PTP film 6 is transported intermittently. The tension roller 31 is in a state of stretching the PTP film 6 toward the side that is tensioned by elasticity, preventing the PTP film 6 between the intermittent transport rollers 28 and 32 from slackening.

[0086] Between the intermittent transport roller 28 and the tension roller 31, along the transport path of the PTP film 6, a slit forming device 33 and an engraving device 34 are successively arranged. The slit forming device 33 has the function of forming a slitting slit at a specified position of the PTP film 6. In addition, the engraving device 34 has the function of adding an engraving at a specified position (such as a label portion) of the PTP film 6. In addition, in Figure 1 etc., the illustration of the slitting slit and the engraving is omitted.

[0087] The PTP film 6 sent out from the intermittent transport roller 32 is successively wound around the tension roller 35 and the continuous transport roller 36 on its downstream side. Between the intermittent transport roller 32 and the tension roller 35, a sheet punching device 37 is provided along the transport path of the PTP film 6. The sheet punching device 37 has the function of punching the outer edge of the PTP film 6 in units of PTP sheets 1.

[0088] The PTP sheet 1 punched by the sheet punching device 37 is transported by the conveyor 39 and temporarily stored in the finished product hopper 40. However, in the case where a defective determination is made by the inspection device 21 or the post-filling inspection device 23, the defective PTP sheet 1 is not sent to the finished product hopper 40, but is discharged separately through a defective sheet discharge mechanism (not shown in the figure).

[0089] A cutting device 41 is arranged on the downstream side of the continuous transport roller 36. Moreover, the unnecessary film portion 42 that constitutes the remaining material portion (scrap portion) remaining in a strip shape after the punching by the sheet punching device 37 is guided to the cutting device 41 after being guided by the tension roller 35 and the continuous feed roller 36. The cutting device 41 cuts the unnecessary film portion 42 into a specified size. The cut unnecessary film portion 42 (scrap) is stored in the scrap hopper 43 and then disposed of separately.

[0090] Next, the inspection device 21 will be described. AsFigure 5 and Figure 6 As shown in Figure 6 , the inspection device 21 includes a lighting device 51, cameras 52 and 53, and an image processing device 54. In addition, the inspection device 21 may also have a display mechanism for displaying information stored in the image processing device 54, and an input mechanism (such as a keyboard, etc.) for inputting information to the image processing device 54. In the present embodiment, the lighting device 51 constitutes an "irradiation mechanism", the cameras 52 and 53 respectively constitute "imaging mechanisms", and the image processing device 54 constitutes a "determination mechanism".

[0091] The lighting device 51 is arranged on the protruding side of the bag portion 2 of the container film 3 as shown in Figure 8 . The lighting device 51 has an LED mounting substrate 51a and a diffusion plate 51b covering it, and is configured to be able to perform surface light emission. Figure 8 , Figure 9 As shown in Figure 9 , the lighting device 51 is arranged on the protruding side of the bag portion 2 of the container film 3. The lighting device 51 has an LED mounting substrate 51a and a diffusion plate 51b covering it, and is configured to be able to perform surface light emission.

[0092] The LED mounting substrate 51a includes a plurality of LEDs that are light sources capable of irradiating ultraviolet light (ultraviolet rays). In the present embodiment, as the ultraviolet light, light having a peak wavelength in the range of 365 nm to 500 nm (more preferably in the range of 365 nm to 420 nm) is used. In addition, the ultraviolet light irradiated from the LED mounting substrate 51a is diffused by the diffusion plate 51b, and the diffused ultraviolet light is irradiated onto one surface of the container film 3. In the present embodiment, the process of irradiating the container film 3 with ultraviolet light by the lighting device 51 corresponds to the "irradiation process". In addition, the lighting device 51 may not have a diffusion plate 51b. In addition, a covering mechanism or the like for preventing the ultraviolet light irradiated from the lighting device 51 from directly reaching the cameras 52 and 53 may be provided.

[0093] The cameras 52 and 53 are arranged on the opening side of the bag portion 2 of the container film 3, and are composed of cameras (such as CCD cameras, CMOS cameras, etc.) that are at least sensitive to ultraviolet light. The cameras 52 and 53 photograph the container film 3 (more specifically, the ultraviolet light transmitted through the container film 3) from the other side of the container film 3. The captured images (image data) obtained by the cameras 52 and 53 are input to the image processing device 54. In the present embodiment, the process of photographing the container film 3 including the bag portion 2 by the cameras 52 and 53 corresponds to the "imaging process".

[0094] In addition, the cameras 52 and 53 are arranged on both sides in the width direction of the container film 3, at a position where all (in this example, 5) bag portions 2 of the container film 3 are located therebetween (refer to Figure 6 , Figure 8 ). In particular, in the present embodiment, the cameras 52 and 53 are arranged on both sides in the width direction of the container film 3, at a position where the entire width region of the container film 3 is located therebetween. Figure 6 , Figure 8 )

[0095] In addition, in the present embodiment, in the inspection device 21, only a pair of cameras 52 and 53 are provided as cameras for photographing the container film 3.

[0096] Return to Figure 5 The image processing device 54 determines the presence or absence of pinholes in at least the bag portion 2 of the container film 3 based on the captured images obtained by the cameras 52 and 53. The image processing device 54 is configured to have a so-called computer system including a CPU as an arithmetic unit, a ROM storing various programs, a RAM temporarily storing various data such as arithmetic data and input / output data, and the like. The image processing device 54 includes an image memory 61, an inspection result storage device 62, a determination memory 63, an inspection condition storage device 64, a camera timing control device 65, and a CPU and an input / output interface 66.

[0097] The image memory 61 stores the captured images input from the respective cameras 52 and 53. Based on the captured images stored in the image memory 61, an inspection related to the presence or absence of pinholes is performed. Of course, when performing the inspection, image processing may be performed on the images. For example, processing such as masking processing and shadow correction may be considered. The binary image obtained by performing binary processing on the captured image, the masked image obtained by performing masking processing, and the like are also stored in the image memory 61.

[0098] The inspection result storage device 62 stores data on the pass / fail determination result, statistical data obtained by processing this data in a probabilistic and statistical manner, and the like.

[0099] The determination memory 63 stores various information for inspection. The various information includes programs for determining the presence or absence of pinholes, various determination values serving as pass / fail determination criteria, and the like. In the present embodiment, as the above determination values, a brightness threshold value, an area reference value, and the like are stored. The brightness threshold value is used to extract high-brightness portions suspected of being pinholes. The area reference value is used to determine whether the above high-brightness portions correspond to pinholes. In the present embodiment, appropriate values calculated in advance are stored as the brightness threshold value and the area reference value, respectively.

[0100] The inspection condition storage device 64 stores the date and time of the failure determination, the inspection conditions used for the inspection, and the like.

[0101] The camera timing control device 65 controls the shooting timing of cameras 52 and 53. More specifically, the camera timing control device 65 controls the shooting timing of cameras 52 and 53 in such a way that the bag portion 2 is photographed at least when it is located at the upstream position R1, the middle position R2, and the downstream position R3, respectively. In addition, the shooting timing of cameras 52 and 53 is controlled according to a signal from an encoder (not shown in the figure) provided in the PTP packaging machine 10 for grasping the conveyance amount of the container film 3.

[0102] Here, the upstream position R1, the middle position R2, and the downstream position R3 will be described. First, as Figure 7 shown, the side wall portion 2b of the bag portion 2 that is located upstream along the conveyance direction of the container film 3 (the direction indicated by the black arrow in Figure 7 ) is defined as the upstream side wall portion 2bu, and the side wall portion 2b of the above side wall portion 2b that is located downstream along the above conveyance direction is defined as the downstream side wall portion 2bd. In addition, the side wall portion located between the upstream side wall portion 2bu and the downstream side wall portion 2bd of the above side wall portion 2b and facing the cameras 52 and 53 in the width direction of the container film 3 is defined as the first front side wall portion 2bl and the second front side wall portion 2br (see Figure 6 ). In the present embodiment, the side wall portion 2b facing the camera 52 is defined as the first front side wall portion 2bl, and the side wall portion 2b facing the camera 53 is defined as the second front side wall portion 2br. The first front side wall portion 2bl and the second front side wall portion 2br respectively correspond to the "front side wall portion".

[0103] In addition, as Figure 6 shown, the upstream position R1 refers to a position that is upstream of the arrangement positions of the cameras 52 and 53 (more specifically, the lens optical axes of the cameras 52 and 53) along the conveyance direction of the container film 3 (the direction indicated by the blackened arrow in Figure 6 ), and the upstream side wall portion 2bu can be photographed by the cameras 52 and 53.

[0104] In addition, the middle position R2 refers to a position located between the two cameras 52 and 53 where the bottom wall portion 2a and the two front side wall portions 2bl and 2br can be photographed by the cameras 52 and 53. In the present embodiment, each bag portion 2 located at the middle position R2 is photographed by the cameras 52 and 53. Thus, the bottom wall portion 2a and the first front side wall portion 2bl of each bag portion 2 are respectively photographed by the camera 52, and the bottom wall portion 2a and the second front side wall portion 2br of each bag portion 2 are respectively photographed by the camera 53.

[0105] Further, the downstream position R3 refers to a position that is downstream of the positions where the cameras 52 and 53 are disposed along the conveyance direction of the container film 3 and where the downstream side wall portion 2bd can be imaged by the cameras 52 and 53.

[0106] In addition, at least with respect to the upstream position R1 and the downstream position R3, as long as the positions of the upstream side wall portion 2bu and the downstream side wall portion 2bd of the bag portion 2 can be imaged by the cameras 52 and 53, these positions R1 and R3 can also be adjusted and changed according to inspection conditions and the like. However, in the present embodiment, the positions R1, R2, and R3 are set such that, by one imaging operation of the cameras 52 and 53, the bag portions 2 located at the upstream position R1, the bag portions 2 located at the intermediate position R2, and the bag portions 2 located at the downstream position R3 are imaged at once.

[0107] In addition, as Figure 10 , Figure 11 shown, captured images Sg1 and Sg2 are obtained by the cameras 52 and 53. Here, in the captured image Sg1 obtained by the camera 52, at least information related to the upstream side wall portion 2bu of all (five in this example) of the bag portions 2 located at the upstream position R1, the bottom wall portion 2a and the first front side wall portion 2bl of all (five in this example) of the bag portions 2 located at the intermediate position R2, and the downstream side wall portion 2bd of all (five in this example) of the bag portions 2 located at the downstream position R3 is included (see Figure 10 ). On the other hand, in the captured image Sg2 obtained by the camera 53, at least information related to the upstream side wall portion 2bu of all of the bag portions 2 located at the upstream position R1, the bottom wall portion 2a and the second front side wall portion 2br of all of the bag portions 2 located at the intermediate position R2, and the downstream side wall portion 2bd of all of the bag portions 2 located at the downstream position R3 is included (see Figure 11 ). In Figure 10 , Figure 11 , as a reference, the conveyance direction (black arrow direction) of the container film 3 is shown together with the positions R1, R2, and R3.

[0108] In addition, imaging by the cameras 52 and 53 is performed each time the bag portion 2 reaches each of the positions R1, R2, and R3. Thus, by the cameras 52 and 53, at least three captured images Sg1 and Sg2 related to one bag portion 2 (capturing one bag portion 2) are obtained respectively. That is, at least a total of six captured images Sg1 and Sg2 with respect to one bag portion 2 are obtained.

[0109] Further, in the present embodiment, for example, the planar range imaged by the camera 52 in the bag portion 2 is Figure 12In the area with the scatter pattern, the range of the plane photographed by the camera 53 in the bag portion 2 is Figure 13 the area with the scatter pattern. In addition, in the present embodiment, two captured images Sg1 and Sg2 obtained by photographing the bag portion 2 located at the intermediate side position R2 cover the entire area of the bottom wall portion 2a of the bag portion 2. In addition, a total of six captured images Sg1 and Sg2 related to one bag portion 2 cover at least the entire area of the one bag portion 2.

[0110] The CPU and the input / output interface 66 (refer to Figure 5 ) have the functions of inputting and outputting various data such as the captured images Sg1 and Sg2 or the determination results of good or bad, and the function of executing various programs. The CPU and the input / output interface 66 use the information stored in the determination memory 63 and the input captured images Sg1 and Sg2 to determine at least the presence or absence of pinholes in the bag portion 2.

[0111] The presence or absence of pinholes is determined as follows. First, when the ultraviolet light of the pinhole PH directly reaches the cameras 52 and 53 (refer to Figure 8 , Figure 9 ), the obtained captured images Sg1 and Sg2 are binarized using the above brightness threshold value, thereby obtaining a binarized image in which the high-brightness portion suspected of having a pinhole PH is set to "1 (bright portion)" and the other portions are set to "0 (dark portion)". Next, a masking process is performed on the obtained binarized image, and the area occupied by the bag portion 2 in the binarized image is set as the inspection object. In addition, the masking process may be performed in such a manner that the entire area or a part of the flange portion 3a is included as the inspection object.

[0112] Then, block processing is performed on the binarized image. In the block processing, processing for determining the connected components (block portions) of "1 (bright portion)" in the binarized image and processing for calculating the area of the block portions are performed. In addition, the area of the block portion is represented by the number of points corresponding to the pixels of the cameras 52 and 53.

[0113] Next, the calculated area of the block portion is compared with the above area reference value. Then, when the area of the block portion is equal to or greater than the above area reference value, it is determined that "there is a pinhole", and the PTP sheet 1 finally having a pinhole PH is determined to be a defective product. On the other hand, when the area of the block portion is less than the above reference value, it is determined that "there is no pinhole". In the present embodiment, the process of determining the presence or absence of pinholes as described above corresponds to the "determination process". In addition, the above method for determining the presence or absence of pinholes is merely an example, and the determination method may be appropriately changed.

[0114] The determination process as described above is performed for all of the acquired captured images Sg1 and Sg2. As a result, regarding one bag portion 2, the presence or absence of a pinhole in the bag portion 2 is determined based on at least the portions corresponding to the bag portion 2 in a total of six or more captured images Sg1 and Sg2. For example, for one bag portion 2x among a plurality of bag portions 2 (refer to Figure 10 , Figure 11 ), based on the portions corresponding to the bag portion 2x in the captured images Sg1 and Sg2 when the bag portion 2x is at the upstream position R1 (refer to Figure 14 , Figure 15 ), the portions corresponding to the bag portion 2x in the captured images Sg1 and Sg2 when the bag portion 2x is at the middle position R2 (refer to Figure 16 , Figure 17 ), and the portions corresponding to the bag portion 2x in the captured images Sg1 and Sg2 when the bag portion 2x is at the downstream position R3 (refer to Figure 18 , Figure 19 ), the presence or absence of a pinhole in the bag portion 2x is determined.

[0115] As described in detail above, according to the present embodiment, the cameras 52 and 53 capture at least the upstream side wall portion 2bu of the bag portion 2 when the bag portion 2 is at the upstream position R1, capture at least the front side wall portions 2bl and 2br of the bag portion 2 when the bag portion 2 is at the middle position R2, and capture at least the downstream side wall portion 2bd of the bag portion 2 when the bag portion 2 is at the downstream position R3. That is, when viewing the container film 3, the cameras 52 and 53 in a direction orthogonal to the container film 3 (as in Figure 6 when viewing the container film 3 or the like), the direction of the vector from the bag portion 2 toward the cameras 52 and 53 (more specifically, the direction of travel of light from the bag portion 2 toward the cameras 52 and 53) is in a state closer to parallel to the thickness direction of each of the side wall portions 2bd, 2bl, 2br, and 2bu that are the imaging objects, and when the cameras 52 and 53 are in a state closer to facing each of the side wall portions 2bd, 2b, 2br, and 2bu that are the imaging objects, each of the side wall portions 2bd, 2b, 2br, and 2bu that are the imaging objects is captured. Therefore, assuming that there is a pinhole in the side wall portion 2b, the ultraviolet light that has passed through the pinhole easily reaches the cameras 52 and 53. As a result, in the captured images Sg1 and Sg2, the pinhole existing in the side wall portion 2b is more clearly shown.

[0116] In addition, the cameras 52 and 53 can capture the bottom wall portion 2a of each bag portion 2 located at the middle position R2. That is, the cameras 52 and 53 are arranged in a direction orthogonal to the container film 3 at a position sufficiently separated from the container film 3. Then, when viewing the container film 3 and the cameras 52 and 53 in the transport direction of the container film 3 (as inFigure 8 In this way, when observing the container film 3 or the like), the direction of the vector from the bag portion 2 toward the cameras 52 and 53 (more specifically, the cameras 52 and 53 close to the bag portion 2), that is, the traveling direction of the light from the bag portion 2 toward the cameras 52 and 53, is in a state closer to parallel to the thickness direction of the bottom wall portion 2a that constitutes the object to be photographed. When the cameras 52 and 53 are in a state closer to being directly opposite to the bottom wall portion 2a of the bag portion 2, the bottom wall portion 2a is photographed. In addition, in the present embodiment, when the bag portion 2 is located at the intermediate side position R2, that is, when the bottom wall portion 2a of the bag portion 2 is closest to the cameras 52 and 53, the bottom wall portion 2a is photographed. As a result, assuming that there is a pinhole in the bottom wall portion 2a, the ultraviolet light that has passed through the pinhole easily reaches the cameras 52 and 53. Thus, in the captured images Sg1 and Sg2, the pinholes existing in the bottom wall portion 2a are more clearly shown.

[0117] In addition, on both sides in the width direction of the container film 3, a pair of cameras 52 and 53 are provided at positions sandwiching the bag portion 2 therebetween. Thus, for a part in the bag portion 2 that cannot be photographed by one of the cameras 52 (53), it can be photographed by the other camera 53 (52). As a result, the captured images Sg1 and Sg2 of the entire area of the bag portion 2 can be obtained more reliably.

[0118] As described above, according to the present embodiment, the captured images Sg1 and Sg2 of the entire area of the bag portion 2 can be obtained more reliably, and in the obtained captured images Sg1 and Sg2, the pinholes existing in the bag portion 2 can be shown more clearly. As a result, the detection accuracy of the pinholes in the bag portion 2 can be made extremely excellent.

[0119] In addition, the inspection device 21 only has a pair of cameras 52 and 53. Therefore, simplification and miniaturization of the inspection device 21, reduction of costs related to manufacturing, maintenance, etc. of the inspection device 21, etc. can be effectively achieved.

[0120] In addition, by one imaging operation of each of the cameras 52 and 53, the bag portion 2 at the upstream side position R1, the bag portion 2 at the intermediate side position R2, and the bag portion 2 at the downstream side position R3 are photographed at one time. Therefore, the captured images Sg1 and Sg2 required for inspection can be obtained with a smaller number of photographing times, and the inspection efficiency can be improved.

[0121] Furthermore, in the present embodiment, the cameras 52 and 53 are provided at positions sandwiching the container film 3 therebetween on both sides in the width direction of the container film 3. Thus, when observing the container film 3, the cameras 52 and 53 in the conveyance direction of the container film 3 (as Figure 8In this way, when viewing the container film or the like, when the direction of the vector from the bag portion 2 toward the cameras 52 and 53 (more specifically, the cameras 52 and 53 close to the bag portion 2), that is, the traveling direction of the light from the bag portion 2 toward the cameras 52 and 53, is in a state closer to parallel to the thickness direction of the front side side wall portions 2bl and 2br, the front side side wall portions 2bl and 2br can be photographed. Therefore, when there are pinholes in the front side side wall portions 2bl and 2br, the ultraviolet light passing through the pinholes is more likely to reach the cameras 52 and 53, and in the captured images Sg1 and Sg2, the pinholes existing in the front side bottom wall portions 2bl and 2br are more clearly shown. Thereby, the detection accuracy of the pinholes in the front side side wall portions 2bl and 2br can be further improved.

[0122] In addition, it is not limited to the description of the above embodiment. For example, it can be implemented as follows. Of course, other application examples and modification examples not listed below are also possible.

[0123] (a) In the above embodiment, it is configured as follows: when the bag portion 2 reaches each position R1, R2, and R3 along with the continuous conveyance of the container film 3, the cameras 52 and 53 perform photographing. That is, the cameras 52 and 53 are always arranged at a fixed position and are configured to sequentially photograph the bag portion 2 of the conveyed container film 3. In contrast, as shown in Figure 20 , a scheme can be formed in which the cameras 52 and 53 can move along the conveyance direction of the container film 3, and while moving the cameras 52 and 53, the bag portion 2 located at each position R1, R2, and R3 viewed from the cameras 52 and 53 is sequentially photographed. In addition, when the container film 3 is conveyed while repeatedly moving and temporarily stopping (i.e., intermittent conveyance), and the moving speed of the container film 3 is high and it is difficult to clearly photograph the bag portion 2 of the moving container film 3, this scheme can be used for the occasion of photographing the bag portion 2 of the temporarily stopped container film 3 and the like.

[0124] (b) The upstream position R1 and the downstream position R3 listed in the above-described embodiment are examples. The upstream position R1 can be set further upstream along the conveying direction of the container film 3, or the downstream position R3 can be set further downstream along the above-described conveying direction. In this case, when observing the container film 3, cameras 52, 53, etc. in a direction orthogonal to the container film 3, when the direction of the vector from the upstream side wall portion 2bu and the downstream side wall portion 2bd toward the cameras 52, 53 (the so-called traveling direction of light from these side wall portions 2bu, 2bd toward the cameras 52, 53) is in a state closer to parallel to the thickness direction of these side wall portions 2bu, 2bd, these side wall portions 2bu, 2bd can be photographed. Therefore, in the photographed images Sg1, Sg2, the pinholes existing in the side wall portions 2bu, 2bd are more clearly shown.

[0125] In addition, in the above-described embodiment, it is configured to photograph the bag portion 2 located at the upstream position R1, the bag portion 2 located at the intermediate position R2, and the bag portion 2 located at the downstream position R3 all at once, but the photographing timings of these bag portions 2 can also be different. For example, at the same time, the bag portion 2 located at the upstream position R1 and the bag portion 2 located at the downstream position R3 can be photographed, and on the other hand, at a timing different from this photographing timing, the bag portion 2 located at the intermediate position R2 can be photographed.

[0126] (c) In the above-described embodiment, the lighting device 51 is provided on the protruding side of the bag portion 2, and the cameras 52, 53 are provided on the opening side of the bag portion 2, but the lighting device 51 can also be provided on the opening side of the bag portion 2, and the cameras 52, 53 can be provided on the protruding side of the bag portion 2.

[0127] (d) In the above-described embodiment, the inspection device 21 only includes a pair of cameras 52, 53 that are cameras for photographing the container film 3 (bag portion 2), but it can also include three or more cameras. For example, two or more pairs of cameras can be provided, or one or more cameras can be provided separately from one or two or more pairs of cameras.

[0128] (e) In the above-described embodiment, it is configured to directly photograph the bottom wall portion 2a and the side wall portion 2b through the cameras 52, 53, but it can also be configured to indirectly photograph the bottom wall portion 2a and the side wall portion 2b using a mirror, a prism, etc.

[0129] (f) In the above-described embodiments, the configurations are such that the cameras 52 and 53 are configured to take pictures when the bag portion 2 reaches each of the positions R1, R2, and R3, and the cameras 52 and 53 are configured to take pictures intermittently. In contrast, the cameras 52 and 53 may also take pictures continuously (i.e., the implementation interval of taking pictures by the cameras 52 and 53 is very short), and pictures are taken even when the bag portion 2 is not located at each of the positions R1, R2, and R3. For example, the configurations may also be such that the cameras 52 and 53 take pictures every time the container film 3 is transported by a length corresponding to the width of one pixel of the cameras 52 and 53.

[0130] (g) In the above-described embodiments, the container film 3 is formed of a colorless and transparent thermoplastic resin material such as PP or PVC, and the cover film 4 is formed of aluminum. In contrast, the container film 3 may also be formed of a resin other than PP and PVC, and the cover film 4 may also be formed of a metal material, a resin material, etc. other than aluminum. In addition, the container film 3 is not limited to being colorless and transparent, and may also be colored and transparent.

[0131] (h) In the above-described embodiments, the container film 3 has a structure including a plurality of bag portions 2 in its width direction. However, the structure may also be such that it includes only one bag portion 2 in its width direction.

[0132] (i) In the above-described embodiments, the PTP sheet 1 is cited as the packaging sheet. However, the technical concept of the present invention may also be applied to packaging sheets other than the PTP sheet 1. In addition, in the above-described embodiments, the tablet 5 is cited as the content. However, the content is not limited to tablets, and may also be capsules, electronic devices, foods, etc. Of course, the shape and structure of the bag portion 2 may be appropriately changed corresponding to the shape, state, etc. of the content.

[0133] (j) In the above-described embodiments, the PTP sheet 1 as the packaging sheet includes a plurality of bag portions 2. However, the number of bag portions 2 provided on the packaging sheet is not limited in any way. Thus, the technical concept of the present invention may also be applied to the manufacture of a packaging sheet having only one bag portion 2.

[0134] Explanation of reference numerals:

[0135] Reference numeral 1 denotes a PTP sheet (packaging sheet);

[0136] Reference numeral 2 denotes a bag portion;

[0137] Reference numeral 2a denotes a bottom wall portion;

[0138] Reference numeral 2b denotes a side wall portion;

[0139] Reference numeral 2bd denotes a downstream side side wall portion;

[0140] Reference numeral 2bl denotes a first front side side wall portion (front side side wall portion);

[0141] Reference numeral 2br indicates the second front side side wall part (second front side side wall part);

[0142] Reference numeral 2bu indicates the upstream side side wall part;

[0143] Reference numeral 3 indicates the container film;

[0144] Reference numeral 4 indicates the cover film;

[0145] Reference numeral 5 indicates the tablet (contents);

[0146] Reference numeral 10 indicates the PTP packaging machine (packaging sheet manufacturing device);

[0147] Reference numeral 21 indicates the inspection device;

[0148] Reference numeral 51 indicates the lighting device (irradiation mechanism);

[0149] Reference numerals 52 and 53 indicate the camera (imaging mechanism);

[0150] Reference numeral 54 indicates the image processing device (judgment mechanism);

[0151] Symbol R1 indicates the upstream side position;

[0152] Symbol R2 indicates the middle side position;

[0153] Symbol R3 indicates the downstream side position.

Claims

1. An inspection device used in manufacturing a packaging sheet, the packaging sheet being in a state where contents are received with respect to a bag portion having a bottom wall portion and a side wall portion formed on a resin container film, and a cover film being attached to the container film in a manner that closes the bag portion, characterized in that, The inspection device includes: An irradiation mechanism that irradiates ultraviolet light toward one surface of the container film at a stage prior to the above-mentioned bag portion of the strip-shaped container film being transported receiving the above-mentioned content; A photographing mechanism that photographs the container film from the other surface side of the container film; and A determination mechanism that determines at least the presence or absence of pinholes in the above-mentioned bag portion based on the captured image obtained by the above-mentioned photographing mechanism; At least a pair of the above-mentioned photographing mechanisms are provided on both sides in the width direction of the container film at positions sandwiching the above-mentioned bag portion therebetween; A position where at least the upstream side side wall portion located on the upstream side in the transport direction of the container film in at least the above-mentioned side wall portion can be photographed by a pair of the above-mentioned photographing mechanisms is defined as the upstream side position; A position where at least the bottom wall portion and the front side side wall portion in the above-mentioned side wall portion that faces the above-mentioned photographing mechanism in the width direction of the container film can be photographed by a pair of the above-mentioned photographing mechanisms is defined as the middle side position; A position where at least the downstream side side wall portion located on the downstream side in the above-mentioned transport direction in the above-mentioned side wall portion can be photographed by a pair of the above-mentioned photographing mechanisms is defined as the downstream side position. At this time, A pair of the above-mentioned photographing mechanisms are arranged to photograph at least the above-mentioned bag portion when the above-mentioned bag portion is located at the above-mentioned upstream position, at the above-mentioned middle side position, and at the above-mentioned downstream side position; The above-mentioned determination mechanism is arranged to determine at least the presence or absence of pinholes in the above-mentioned bag portion based on a plurality of captured images obtained by a pair of the above-mentioned photographing mechanisms and including information related to the above-mentioned downstream side side wall portion, the above-mentioned front side side wall portion, the above-mentioned upstream side side wall portion, and the above-mentioned bottom wall portion.

2. The inspection device according to claim 1, characterized in that, Only a pair of the above-mentioned photographing mechanisms are provided.

3. The inspection device according to claim 1, characterized in that, A plurality of the above-mentioned bag portions are arranged in parallel in the transport direction of the container film; The above-mentioned inspection device is arranged to photograph the above-mentioned bag portion located at the above-mentioned upstream side position, the above-mentioned bag portion located at the above-mentioned middle side position, and the above-mentioned bag portion located at the above-mentioned downstream side position at one time through one photographing operation of the above-mentioned photographing mechanism.

4. The inspection device according to claim 2, wherein A plurality of the above-mentioned bag portions are arranged in parallel in the transport direction of the container film; The above-mentioned inspection device is arranged to photograph the above-mentioned bag portion located at the above-mentioned upstream side position, the above-mentioned bag portion located at the above-mentioned middle side position, and the above-mentioned bag portion located at the above-mentioned downstream side position at one time through one photographing operation of the above-mentioned photographing mechanism.

5. The inspection device according to claim 1, characterized in that, A pair of the above-mentioned photographing mechanisms are provided on both sides in the width direction of the container film at positions sandwiching the container film therebetween.

6. The inspection device according to claim 2, characterized in that, A pair of the above-mentioned photographing mechanisms are provided on both sides in the width direction of the container film at positions sandwiching the container film therebetween.

7. The inspection device according to claim 3, characterized in that, A pair of the above-mentioned photographing mechanisms are provided on both sides in the width direction of the container film at positions sandwiching the container film therebetween.

8. The inspection apparatus according to claim 4, wherein A pair of the above-mentioned photographing mechanisms are provided on both sides in the width direction of the container film at positions sandwiching the container film therebetween.

9. A packaging sheet manufacturing apparatus, characterized in that, The packaging sheet manufacturing device includes the inspection device according to any one of claims 1 to 8.

10. An inspection method used in manufacturing a packaging sheet, the packaging sheet being in a state of receiving contents with respect to a bag portion having a bottom wall portion and a side wall portion formed on a resin container film, and a cover film being attached to the container film in a manner of closing the bag portion, characterized in that, The inspection method includes: An irradiation step in which ultraviolet light is irradiated toward one surface of the container film at a stage prior to the above-mentioned bag portion of the strip-shaped container film being transported receiving the above-mentioned content. An imaging process, in which, on both sides in the width direction of the above-mentioned container film, at positions where the above-mentioned bag portion is placed therebetween, the container film is imaged from the other side of the container film by providing at least a pair of imaging mechanisms; and A determination process, in which, based on the captured images obtained through the above-mentioned imaging process, at least the presence or absence of pinholes in the above-mentioned bag portion is determined, A position where at least the upstream side side wall portion located upstream in the conveying direction of the container film in at least the above-mentioned side wall portion can be imaged by a pair of the above-mentioned imaging mechanisms is defined as the upstream side position, A position where at least the bottom wall portion and the front side side wall portion in the above-mentioned side wall portion that faces the above-mentioned imaging mechanism in the width direction of the container film can be imaged by a pair of the above-mentioned imaging mechanisms is defined as the middle side position, A position where at least the downstream side side wall portion located downstream in the above-mentioned conveying direction in the above-mentioned side wall portion can be imaged by a pair of the above-mentioned imaging mechanisms is defined as the downstream side position. At this time, In the above-mentioned imaging process, by a pair of the above-mentioned imaging mechanisms, the above-mentioned bag portion is imaged at least when the above-mentioned bag portion is located at the above-mentioned upstream side position, at the above-mentioned middle side position, and at the above-mentioned downstream side position, In the above-mentioned determination process, based on a plurality of captured images obtained through the above-mentioned imaging process and including information related to the above-mentioned downstream side side wall portion, the above-mentioned front side side wall portion, the above-mentioned upstream side side wall portion, and the above-mentioned bottom wall portion, at least the presence or absence of pinholes in the above-mentioned bag portion is determined.

Images