JP2015094694A - Inspection apparatus and ptp packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection apparatus configured to improve inspection accuracy of pinhole inspection, and a PTP packaging machine.SOLUTION: An inspection apparatus includes: illumination devices 22A, 22B for emitting light to a container film 3 which has not stored a tablet in a pocket part 2; cameras 23A, 23B arranged opposite the illumination devices 22A, 22B across the container film 3; a light-condensing sheet 59 which is arranged between the container film 3 and the cameras 23A, 23B, receives light emitted from the illumination devices 22A, 22B and passing through the container film 3, changes a direction of the incident light, and emits it along an optical axis L1 of the cameras 23A, 23B; and image processing means which processes an image signal output from the cameras 23A, 23B. On the basis of image data obtained from the image signal, the light passing through the container film 3 and the light-condensing sheet 59 is detected, to detect pinholes 50A, 50B formed in the container film 3.

Description

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

  The PTP sheet is composed of a container film in which a pocket part filled with contents such as tablets is formed, and a cover film that is attached to the container film so as to seal the opening side of the pocket part. .

  The container film may have a hole called a pinhole when the pocket portion is formed. For this reason, when manufacturing a PTP sheet, the pinhole test | inspection which detects a pinhole after shaping | molding a pocket part is implemented.

  Such pinhole inspection is generally performed by irradiating the container film with light from the irradiating means and imaging the transmitted light passing through the pinhole with a camera.

  For example, a method of detecting a pinhole by imaging light projected through a pinhole and projected on a screen is known (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 4-309849

  However, in the above conventional inspection method, since the light projected on the screen is imaged, there is a possibility that a sufficient amount of light does not reach the camera and pinholes cannot be detected. In particular, it is extremely difficult to detect light passing through a pinhole opened in the side portion of the pocket portion.

  On the other hand, for example, a method of detecting a pinhole by imaging light that has passed through the pinhole and irregularly reflected on the surface of the tablet in a stage after the tablet is filled in the pocket portion has been considered.

  However, in the inspection method using the filled tablet, it is not possible to detect pinholes existing at the bottom of the pocket part, but also regarding the pinholes existing on the side surface of the pocket part, the depth of the pocket part, Depending on the relationship between the size of the tablet, the opening position of the pinhole in the side surface portion of the pocket portion, etc., the pinhole is blocked by the tablet, or the light that passed through the pinhole is not irradiated to the tablet, etc. There is also concern that pinholes cannot be detected.

  Even if the pinhole that exists in the side surface portion of the pocket portion is not blocked by the tablet, the light that has diffusely reflected on the tablet surface through the pinhole still does not reach the camera, so the above-mentioned It may be difficult to detect as in the conventional inspection method.

  This invention is made | formed in view of the said situation, The objective is to provide the inspection apparatus and PTP packaging machine which can aim at the improvement of the test | inspection precision of a pinhole test | inspection, etc.

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

Means 1. An inspection apparatus used in the manufacture of a PTP sheet in which contents are stored in a pocket portion formed in a belt-shaped container film to be transported, and a cover film is attached so as to close the pocket portion,
Irradiating means for irradiating predetermined light to the container film before the contents are stored in the pocket portion;
Imaging means provided on the opposite side of the irradiation means with the container film,
Provided between the container film and the imaging means, and incident on the light irradiated from the irradiation means and passed through the container film, changing the direction of the incident light, and the optical axis direction of the imaging means Condensing means capable of emitting along
Image processing means for processing an image signal output from the imaging means,
The image processing means includes
A pinhole existing in the container film can be detected by detecting light that has passed through the container film and the light collecting means based on image data obtained from the image signal. Inspection device.

  According to the said means 1, a pinhole test | inspection can be implemented in the stage before a content is filled with respect to the pocket part of a container film.

  In this inspection, if there is a pinhole in the container film, the light irradiated from the irradiation unit and passed through the pinhole is imaged by the imaging unit through the light collecting unit. And the image processing means can detect the pinhole which exists in a container film based on the image data obtained from the imaging means.

  At this time, in the condensing means, among the light incident on itself, the light incident obliquely with respect to the optical axis direction of the imaging means is converted into the optical axis direction of the imaging means and emitted. It becomes.

As a result, it is possible to detect a pinhole opened in the side surface portion of the pocket portion, which has been difficult to detect because a sufficient amount of light cannot be obtained conventionally. As a result, it is possible to improve the inspection accuracy of the pinhole inspection. Further, it is possible to simultaneously detect the pinholes opened in the bottom and side portions of the pocket portion, and the inspection efficiency can be improved.

  In addition, compared to a configuration in which pocket portions are individually inspected, it is possible to inspect a wide range including a plurality of pocket portions at the same time while transporting a container film continuously at a high speed. Improvements can be made.

  In addition, as an example of the “light condensing unit”, “a projecting ridge portion (a projecting ridge portion having a triangular cross section or a semicircular cross section shape) on an incident surface on which light irradiated from the irradiating unit and having passed through the container film is incident. Etc.) and a light collecting sheet (prism sheet) having a flat exit surface from which light is emitted, or “light irradiated from the irradiation means and passed through the container film is incident. Condensation sheets in which projections (pyramidal, conical or hemispherical projections, etc.) are arranged in a matrix on the incident surface to be emitted and the emission surface from which light is emitted is formed flat. And the like.

Mean 2. The container film is composed of a resin material having translucency,
2. The inspection apparatus according to claim 1, wherein the irradiation unit is configured to be able to irradiate ultraviolet light as the predetermined light.

  In the case where the container film is made of a translucent resin material, if the visible light is irradiated from the irradiation means, not only the light that has passed through the pinhole, but also the general part of the container film Since the transmitted visible light is also imaged by the imaging means, there is a possibility that the pinhole cannot be detected properly.

  On the other hand, according to the above-mentioned means 2, ultraviolet light has a lower transmittance than visible light and hardly passes through the general part of the container film with respect to the resin material having translucency. A part becomes only a pinhole, and generation | occurrence | production of the said malfunction can be suppressed.

  However, in the case of ultraviolet light, the amount of light passing through the pinhole may be less than that of visible light, so that the operational effect of the means 1 is more effective under the configuration of the means 2.

  Means 3. The inspection apparatus according to claim 1 or 2, wherein the irradiating means includes a diffusing means for diffusing light emitted from a predetermined light source.

  According to the means 3, by irradiating the container film with the diffused light, the light easily passes through the pinhole opened in the side surface portion of the pocket portion, so that the pinhole is more easily detected.

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

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

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

Means 5. As the condensing means, a plurality of ridges (such as ridges having a triangular cross section or a semicircular cross section) are juxtaposed on the incident surface on which the light irradiated from the irradiating means and the light passing through the container film is incident. And a plurality of inspection devices according to any one of means 1 to 3 having a condensing sheet having a flat exit surface from which light is emitted,
The PTP wrapping machine, wherein the condensing sheet according to each inspection device is arranged so that the longitudinal direction of the protrusion is different for each inspection device.

  In the case of the light collecting sheet in which a plurality of protrusions are arranged in parallel as described above, for example, the light incident along the longitudinal direction of the protrusions, depending on the direction, the container film There is a possibility that the light that has passed therethrough cannot be efficiently incident and emitted along the optical axis direction of the imaging means.

  On the other hand, according to the means 5, in addition to the same effects as the means 4, a plurality of inspection devices are provided, and the longitudinal direction of the protrusions of the light collecting sheet according to each inspection device is The orientation is different for each inspection device.

  As a result, even if the above-described problem occurs in one inspection apparatus and the pinhole cannot be detected, the pinhole can be detected in another inspection apparatus. As a result, the inspection accuracy can be improved.

It is a schematic diagram which shows schematic structure of a PTP packaging machine. (A) is a perspective view which shows a PTP sheet, (b) is the elements on larger scale of the pocket part of a PTP sheet. It is a cross-sectional schematic diagram which shows schematic structure of an inspection apparatus. It is a block diagram which shows the electric constitution of a test | inspection apparatus. It is a flowchart which shows a test | inspection routine. (A) is a partial expansion perspective view of a condensing sheet, (b), (c) is a partial expansion perspective view of a condensing sheet concerning another embodiment.

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

  As shown in FIGS. 2A and 2B, the PTP sheet 1 includes a container film 3 having a plurality of pocket portions 2 and a cover film attached to the container film 3 so as to close the pocket portions 2. 4. Each pocket 2 stores one tablet 5 as a content.

  The container film 3 in the present embodiment is made of a colorless and transparent thermoplastic resin material such as PP (polypropylene) or PVC (polyvinyl chloride), and has translucency. On the other hand, the cover film 4 is made of aluminum.

  Next, a schematic configuration of the PTP packaging machine 7 for manufacturing the PTP sheet 1 will be described with reference to FIG.

  As shown in FIG. 1, in the PTP packaging machine 7, the strip-shaped container film 3 drawn out from the roll-shaped original fabric is guided to the film feed roll 11 via the tension rolls 9 and 10.

  A heating device 12 and a pocket portion forming device 13 are disposed between the tension rolls 9 and 10.

  Here, in a state where the container film 3 is heated by the heating device 12 and the container film 3 becomes relatively flexible, a plurality of pocket portions 2 are formed at predetermined positions of the container film 3 by the pocket portion forming device 13. . The heating device 12 and the pocket portion forming device 13 constitute the pocket portion forming means in this embodiment.

  Further, the container film 3 fed from the film feed roll 11 is guided to the film receiving roll 18.

  Between the film feed roll 11 and the film receiving roll 18, a tablet filling device 14 is disposed as a filling means for filling the pocket 2 with the tablet 5.

  On the other hand, the strip-shaped cover film 4 drawn out from the roll-shaped raw fabric is guided to the film receiving roll 18 through the tension rolls 16 and 17. A heating roll 19 can be pressed against the film receiving roll 18, and the container film 3 and the cover film 4 are fed between the rolls 18 and 19.

  When both films 3 and 4 pass between both rolls 18 and 19 in a heated and pressed state, the cover film 4 is attached to the container film 3, and the pocket portion 2 is closed by the cover film 4. . The film receiving roll 18 and the heating roll 19 constitute the attachment means in this embodiment.

  Thereby, the strip-shaped PTP film 20 in which the tablet 5 is filled in each pocket portion 2 is manufactured. Then, the PTP sheet 1 is manufactured by punching the strip-shaped PTP film 20 into a sheet shape by a sheet punching device (sheet punching means) (not shown).

  The outline of the PTP packaging machine 7 is as described above. The PTP packaging machine 7 is provided with an inspection device after the pocket portion 2 is formed and before the tablet portion 5 is filled with the tablet portion 2. ing. When a defective product is determined by such an inspection apparatus, the PTP sheet 1 that has been determined to be defective is discharged by a defective sheet discharge mechanism (discharge means) (not shown) after the sheet is punched out.

  The inspection apparatus in the present embodiment performs an inspection mainly for the detection of pinholes existing in the container film 3, and includes a first inspection apparatus 21A and a second inspection apparatus 21B. Specifically, along the conveyance path of the container film 3, the first inspection device 21A is disposed on the upstream side, and the second inspection device 21B is disposed on the downstream side.

  Hereinafter, the configuration of the inspection devices 21A and 21B will be described in detail with reference to FIGS.

  The first inspection apparatus 21A includes an illumination device 22A as a first irradiation unit, a camera 23A as a first imaging unit, an image processing device 24A as a first image processing unit, a monitor 25A, a keyboard 26A, and the like.

  Similarly, the second inspection device 21B includes an illumination device 22B as a second irradiation unit, a camera 23B as a second imaging unit, an image processing device 24B as a second image processing unit, a monitor 25B, a keyboard 26B, and the like. Yes.

  First, the lighting devices 22A and 22B will be described in detail. The illuminating devices 22 </ b> A and 22 </ b> B in the present embodiment are disposed on the protruding side of the pocket portion 2 of the container film 3.

  The illuminating devices 22A and 22B have an LED mounting board 57 and a diffusion plate 58 as a diffusion means that covers the LED mounting board 57, and are configured to be capable of surface light emission.

  On the LED mounting substrate 57, a large number of LEDs 57a as light sources capable of irradiating ultraviolet light (ultraviolet rays) as predetermined light are arranged.

  Moreover, each camera 23A, 23B is provided on the opposite side to each illuminating device 22A, 22B via the container film 3, respectively. In this embodiment, a CCD camera sensitive to at least ultraviolet light is employed as the cameras 23A and 23B.

  Thereby, the ultraviolet light which permeate | transmitted the container film 3 among the ultraviolet light irradiated from each illuminating device 22A, 22B will be imaged by each camera 23A, 23B.

  The image data captured by each camera 23A, 23B is converted into a digital signal inside each camera 23A, 23B and then input to each image processing device 24A, 24B in the form of a digital signal. ing.

  As shown in FIG. 4, each of the image processing devices 24A and 24B includes image memories 41A and 41B, masking means 42A and 42B, binarizing means 43A and 43B, and determination memories 44A and 44B corresponding to the cameras 23A and 23B, respectively. 44B, inspection result and statistical data memories 45A and 45B, camera timing control means 46A and 46B, CPU and input / output interfaces 47A and 47B, etc., processing of image data as described later, and defect determination (inspection) Etc. can be implemented.

  Image data captured by the cameras 23A and 23B are converted into digital signals and then stored in the corresponding image memories 41A and 41B, respectively. Each image data is subjected to masking processing by the masking means 42A and 42B at the time of inspection, and is stored again in the image memories 41A and 41B. Similarly, the image data is stored by the binarizing means 43A and 43B. After being converted into a value, it is stored again in each of the image memories 41A and 41B.

  Each CPU and the input / output interfaces 47A and 47B execute various processing programs while using the stored contents of the determination memories 44A and 44B, and send control signals to the PTP packaging machine 7 or from the PTP packaging machine 7. This is for transmitting and receiving various signals such as operation signals. Thereby, for example, the defective sheet discharge mechanism of the PTP packaging machine 7 can be controlled.

  The CPU and input / output interfaces 47A and 47B also have a function of sending display data to the monitors 25A and 25B. With this function, various image data, inspection results, and the like can be displayed on the monitors 25A and 25B. Further, the CPU and input / output interfaces 47A and 47B also have a function of inputting data from the keyboards 26A and 26B.

  The inspection result and statistical data memories 45A and 45B store data such as coordinates relating to image data, inspection result data, statistical data obtained by probabilistically processing the inspection result data, and the like. These inspection result data and statistical data can be appropriately displayed on the monitors 25A and 25B based on the control of the CPU and the input / output interfaces 47A and 47B. In addition, the CPU and the input / output interfaces 47A and 47B can send control signals to the PTP packaging machine 7 based on these inspection result data and statistical data.

  The camera timing control means 46A, 46B controls the timing at which image data captured by each camera 23A, 23B is taken into each image memory 41A, 41B. Such timing is controlled based on a signal from an encoder (not shown) provided in the PTP packaging machine 7, and images are taken in sheet units (for example, PTP sheet units to be punched) by the cameras 23A and 23B each time a predetermined amount of the container film 3 is fed. Is done.

  Further, as shown in FIG. 3 and the like, in the inspection devices 21A and 21B of the present embodiment, the light collecting means is provided between the container film 3 passing above the illumination devices 22A and 22B and the cameras 23A and 23B. A condensing sheet 59 is provided.

  The light collecting sheet 59 in the present embodiment is configured by a prism sheet made of a transparent material. More specifically, the condensing sheet 59 includes an incident surface 59a facing the container film 3 and an exit surface 59b positioned on the opposite camera 23A, 23B side (see FIG. 6A).

  While the emission surface 59b is formed flat, a plurality of protrusions 59c having a triangular cross section are arranged in parallel along the predetermined direction on the incidence surface 59a. The condensing sheet 59 is arranged such that the normal direction of the emission surface 59b is along the optical axis L1 direction of the cameras 23A and 23B.

  Thereby, the condensing sheet 59 injects the light irradiated from the illuminating devices 22A and 22B and passed through the container film 3, changes the direction of the incident light, and follows the optical axis L1 direction of the cameras 23A and 23B. And can be emitted.

  For example, light incident on the condensing sheet 59 that is obliquely incident on the optical axis L1 direction of the cameras 23A and 23B (see G2 in FIG. 3) is reflected or refracted inside the condensing sheet 59. The direction is converted into the direction of the optical axis L1 of the cameras 23A and 23B and emitted.

  However, the condensing sheet 59 in the first inspection apparatus 21 </ b> A on the upstream side is arranged so that the longitudinal direction of the protruding portion 59 c of the incident surface 59 a is along the X-axis direction that is the film transport direction of the container film 3. On the other hand, the condensing sheet 59 in the second inspection apparatus 21 </ b> B is disposed on the downstream side so that the longitudinal direction of the protrusion 59 c of the incident surface 59 a is along the Y-axis direction that is the film width direction of the container film 3.

  Next, a pinhole inspection procedure performed by the inspection devices 21A and 21B will be described with reference to the flowchart of FIG.

  First, in step S <b> 101, the container film 3 is irradiated with ultraviolet light from the illumination device 22 </ b> A (22 </ b> B), and the container film 3 irradiated with the ultraviolet light is imaged by the camera 53 through the light collecting sheet 59. Thereby, the inspection grayscale image of the container film 3 per sheet to be inspected is acquired.

  In step S102, the grayscale image data acquired in step S101 is binarized based on a predetermined threshold, and the binarized image data is stored in the image memory 41A (41B).

  In step S103, chunk processing is performed on the binarized image data acquired in step S102. With this processing, pixel portions having luminance exceeding a predetermined threshold are defined as locations corresponding to the pinholes 50A and 50B (see FIG. 3).

  In step S104, it is determined whether or not there is a block defined in step S103. If it is determined that there is no lump (no pinhole) in the area per sheet, the non-defective product is determined in step S105, and the process is terminated. On the other hand, if it is determined that there is a lump (with a pinhole), a defective product is determined in step S106, and this process is temporarily terminated. These inspection results are output to the monitor 25A (25B) and the PTP packaging machine 7 (including the defective sheet discharge mechanism).

  As described in detail above, in the present embodiment, when the pinhole inspection is performed before the tablet 5 is filled, when the pinholes 50A and 50B exist on the bottom 2a and the side surface 2b of the pocket portion 2, Lights G1 and G2 that have passed through the pinholes 50A and 50B are incident on the light collecting sheet 59.

  In the condensing sheet 59, of the light G1 and G2 incident thereon, the light incident obliquely with respect to the direction of the optical axis L1 of the camera 23A (23B) is oriented in the direction of the optical axis L1 of the camera 23A (23B). It is converted into a direction and emitted.

  The pinholes 50A and 50B are detected by the image processing device 24A (24A) based on the image data obtained by imaging the light emitted from the light collecting sheet 59 by the camera 23A (23B).

As a result, it is possible to detect the pinhole 50B opened in the side surface portion 2b of the pocket portion 2 that has been difficult to detect because a sufficient amount of light cannot be obtained conventionally. As a result, it is possible to improve the inspection accuracy of the pinhole inspection. Furthermore, it becomes possible to simultaneously detect the pinholes 50A and 50B opened in the bottom portion 2a and the side surface portion 2b of the pocket portion 2, thereby improving the inspection efficiency. Can be planned.

  In addition, compared to a configuration in which the pocket portions 2 are individually inspected, it is possible to simultaneously inspect a wide range including a plurality of pocket portions 2 while transporting the container film 3 at a high speed and further. Inspection efficiency can be improved.

  Moreover, in this embodiment, it becomes the structure which irradiates with ultraviolet light from illumination device 22A, 22B with respect to the container film 3 comprised with the resin material which has translucency.

  In the case where the container film 3 is made of a resin material having translucency, if only the light that has passed through the pinholes 50A and 50B is assumed to be irradiated with visible light from the illumination devices 22A and 22B, In addition, since visible light that has passed through the general part of the container film 3 is also captured by the cameras 23A and 23B, the pinholes 50A and 50B may not be detected appropriately.

  In contrast to the resin material having translucency, ultraviolet light has a lower transmittance than visible light and is difficult to transmit through the general part of the container film 3. Only the pinholes 50A and 50B are provided, and the occurrence of the above-described problems can be suppressed.

  However, in the case of ultraviolet light, the amount of light passing through the pinholes 50A and 50B may be less than that of visible light, so that the configuration using the condensing sheet 59 is more effective under such a configuration. Become.

  Further, in the present embodiment, the condensing sheet 59 in the first inspection device 21A on the upstream side and the condensing sheet 59 in the second inspection device 21B on the downstream side are oriented in the longitudinal direction of the protruding portion 59c of the incident surface 59a. Are arranged differently.

  In the case of the light collecting sheet 59 in which a plurality of protrusions 59c are arranged side by side as described above, depending on the direction of light incident along the longitudinal direction of the protrusions 59c, the pinholes 50A and 50B may be There is a possibility that the light G1 and G2 that have passed through may be efficiently incident and cannot be emitted along the direction of the optical axis L1 of the cameras 23A and 23B.

  On the other hand, according to the present embodiment, by providing two inspection devices 21A and 21B, even if the above-described problem occurs in one inspection device 21A and the pinholes 50A and 50B cannot be detected, It becomes possible to detect the pinholes 50A and 50B in the other inspection device 21B. As a result, the inspection accuracy can be improved.

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

  (A) In the above embodiment, the case where the content is the tablet 5 is specified, but the type, shape, and the like of the content are not particularly limited. For example, the content such as food or electronic parts is not limited. It may be different from the tablet 5.

  (B) In the said embodiment, although it becomes the structure provided with the two test | inspection apparatuses 21A and 21B, it is good also as a structure which abbreviate | omits any one and is only one.

  (C) The configuration of the light collecting means is not limited to the above embodiment. For example, in the above-described embodiment, a plurality of triangular protrusions 59c are arranged in parallel on the incident surface 59a on which the lights G1 and G2 that have passed through the pinholes 50A and 50B are incident, and the emission surface 59b from which the light is emitted is arranged. A condensing sheet (prism sheet) 59 in which is formed flat is employed. Not only this but the condensing sheet | seat which has a protrusion part with a semicircle cross section in the entrance plane may be employ | adopted.

  Further, as shown in FIG. 6 (b), as the light condensing means, two light condensing sheets 59 stacked one above the other may be adopted. At this time, the upper condensing sheet 59 is arranged so that the longitudinal direction of the protrusion 59c of the incident surface 59a is along the X-axis direction which is the film transport direction of the container film 3, while the lower condensing sheet 59 may be arranged so that the longitudinal direction of the protrusion 59c of the incident surface 59a is along the Y-axis direction which is the film width direction of the container film 3. By providing such a condensing means in one inspection apparatus, the same effect as the above-mentioned embodiment provided with two inspection apparatuses 21A and 21B is produced.

  Moreover, as shown in FIG.6 (c), it replaces with the structure provided with various protrusions, and the pyramid-shaped protrusion part in the entrance plane 65a in which the lights G1 and G2 which passed the pinholes 50A and 50B enter The condensing sheet 65 may be employed in which 65c are arranged in a matrix and the emission surface 65b from which light is emitted is formed flat. Here, the shape of the protruding portion 65c is not limited to a quadrangular pyramid shape. Instead, for example, another pyramidal, conical or hemispherical protruding portion may be employed.

  (D) In the above embodiment, the lighting devices 22A and 22B are arranged on the side of the container film 3 protruding from the pocket portion 2, and the cameras 23A and 23B are arranged on the opening side of the pocket portion 2 of the container film 3. However, the present invention is not limited to this, and the configuration may be such that the positions of the illumination devices 22A and 22B and the positions of the cameras 23A and 23B are reversed.

  (E) In the above-described embodiment, the CCD cameras 23A and 23B are employed as the imaging means. However, the present invention is not limited to this. For example, a CMOS camera may be employed. Although not specifically mentioned, a monochrome camera or a color camera may be employed.

  (F) In the above embodiment, 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. It is not limited to the above, and other materials may be adopted.

  For example, regarding the container film 3, not only the colorless and transparent container film 3, but also a colored transparent film such as a red transparent film may be adopted. Moreover, you may employ | adopt the container film 3 made from aluminum.

  (G) In the said embodiment, although it has become a structure which irradiates ultraviolet light from illuminating device 22A, 22B, the light irradiated from illuminating device 22A, 22B is not limited to this.

  However, when inspecting the colorless and transparent container film 3 and the like according to the above-described embodiment, ultraviolet light, violet light, or blue light having a peak wavelength in the range of 365 nm to 500 nm is preferable. Furthermore, ultraviolet light having a peak wavelength in the range of 365 nm to 420 nm is preferable.

  Further, for example, when the container film 3 is formed of a resin material having poor translucency, aluminum, or the like, it may be configured to irradiate visible light having a peak wavelength in a range exceeding 500 nm.

  (H) In the above-described embodiment, the lighting devices 22A and 22B are configured to include the diffusing plate 58 as the diffusing means, but may be configured to omit this.

  DESCRIPTION OF SYMBOLS 1 ... PTP sheet, 2 ... Pocket part, 3 ... Container film, 4 ... Cover film, 5 ... Tablet, 7 ... PTP packaging machine, 21A, 21B ... Inspection apparatus, 22A, 22B ... Illumination device, 23A, 23B ... Camera, 24A, 24B ... image processing device, 50A, 50B ... pinhole, 58 ... diffuser plate, 59 ... condensing sheet, L1 ... optical axis.

Claims (5)

An inspection apparatus used in the manufacture of a PTP sheet in which contents are stored in a pocket portion formed in a belt-shaped container film to be transported, and a cover film is attached so as to close the pocket portion,
Irradiating means for irradiating predetermined light to the container film before the contents are stored in the pocket portion;
Imaging means provided on the opposite side of the irradiation means with the container film,
Provided between the container film and the imaging means, and incident on the light irradiated from the irradiation means and passed through the container film, changing the direction of the incident light, and the optical axis direction of the imaging means Condensing means capable of emitting along
Image processing means for processing an image signal output from the imaging means,
The image processing means includes
A pinhole existing in the container film can be detected by detecting light that has passed through the container film and the light collecting means based on image data obtained from the image signal. Inspection device. The container film is composed of a resin material having translucency,
The inspection apparatus according to claim 1, wherein the irradiation unit is configured to be capable of irradiating ultraviolet light as the predetermined light.   The inspection apparatus according to claim 1, wherein the irradiation unit includes a diffusion unit that diffuses light emitted from a predetermined light source.   A PTP packaging machine comprising the inspection device according to claim 1. As the condensing means, a plurality of protrusions are arranged side by side on the incident surface on which light irradiated from the irradiation means and passed through the container film is incident, and an emission surface from which light is emitted is formed flat. A plurality of inspection devices according to any one of claims 1 to 3 having a condensing sheet,
The PTP wrapping machine, wherein the condensing sheet according to each inspection device is arranged so that the longitudinal direction of the protrusion is different for each inspection device.

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