JP2005164272A - Sheet packing inspection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow switching photographing switched between a clear reflected image and a transmitted image, by one camera, and to reduce the size, while keeping abnormality inspecting precision high. <P>SOLUTION: One CCD camera 15 and a light source 27 for reflection are provided in an upper position facing an upper face formed with a recessed part 3 of a packing sheet 2, a light source 16 for transmission is provided at a lower position facing under face, opposite to the upper face formed with the recessed part 3 of the packing sheet 2, and a liquid crystal shutter plate 17 is interposed between the under face of the packing sheet 2 and the light source 16 for the transmission to transmit or shield light, in response to an external signal. The camera is driven, under the conditions where the light source for the transmission lights is turned on, where the light source for the reflection is turned off and where an electronic shutter plate is translucent, so as to acquire transmitted images of the recessed part of the packing sheet and its periphery. The camera is driven, under the condition where the light source for the transmission turned off, where the light source for the reflection is turned on and where the electronic shutter plate is shielded, to acquire reflected images of the recessed part of the packing sheet and its periphery. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sheet packaging inspection apparatus for inspecting whether or not there is an abnormality in a solid object such as a tablet in which a sheet is packaged and a packaging sheet for packaging the solid object.

  In recent years, a plurality of tablets are often stored in so-called prestar packs from the viewpoints of quality assurance, hygiene management, handling, and the like. FIG. 6 is a diagram showing a sheet packaging process for one tablet stored in a prestar pack in a manufacturing process of a prestar pack storing a plurality of tablets.

  In FIG. 6A, for example, a substantially transparent belt-like packaging sheet 2 made of vinyl chloride wound around the coil 1 is rewound. Next, in FIG.6 (b), the recessed part 3 is formed with a fixed space | interval using the heat | fever suction processing machine with respect to the wrapping sheet | seat 2 unwound. Next, in FIG.6 (c), the tablet 4 is accommodated in each recessed part 3 sequentially formed in the packaging sheet 2 using a tablet storage machine. Then, in FIG. 6D, the surface (upper surface) on which each recess 3 of the packaging sheet 2 in the state where the tablet 4 is stored in each recess 3 is covered with a flat covering sheet 5 made of aluminum foil. cover. Finally, the packaging sheet 2 covered with the covering sheet 5 is cut into a size including a predetermined number of tablets 4 to obtain a target prestar pack.

  6 (a) to 6 (d), the sheet unwinding step of FIG. 6 (a), the recess forming step of FIG. 6 (b), and the tablet storing step of FIG. 6 (c). , The foreign material is mixed or adhered to the packaging sheet 2, the deformation or crack of the recess 3, the color of the tablet 4 is different, the outer diameter of the tablet 4 is abnormal, the foreign material on the surface of the tablet 4, the crack of the tablet 4 is printed on the tablet 4 It is necessary to check for the presence of various abnormalities such as character differences.

  As a method for inspecting the presence or absence of various abnormalities in the sheet packaging process without stopping the prestar pack production line, the packaging sheet 2 and tablets 4 after the tablet storage process in FIG. In general, a technique for inspecting the presence or absence of an abnormality from the photographed image is employed.

  Furthermore, in order to accurately inspect for the presence or absence of various abnormalities, as shown in FIG. 7, between the tablet storing step in FIG. 6 (c) and the covering sheet attaching step in FIG. An inspection device 6 and a transmission inspection device 7 are installed. In the reflection type inspection device 6, a camera 8 and a reflection light source 9 are provided above the surface of the packaging sheet 2 on which the recess 3 is formed, and the camera 8 allows the recess 3 and the periphery of the packaging sheet 2 to be viewed from above. Take a picture to get a reflection image.

  In the transmission type inspection device 7, a camera 10 is provided above the surface of the packaging sheet 2 where the recess 3 is formed, and a light source 11 for transmission is provided below the opposite surface of the packaging sheet 2 where the recess 3 is not formed. Then, the camera 10 captures the recess 3 and its periphery of the packaging sheet 2 from above to obtain a transmission image.

  The reflection image is used to inspect the tablet 4 for color differences, foreign matter on the surface of the tablet 4, cracks in the tablet 4, character differences printed on the tablet 4, and the like. Some specific inspection methods of these various inspections are reported in Patent Document 1.

  Using the transmission image, inspection is performed for foreign matter contamination or foreign matter adhesion of the packaging sheet 2 around the recess 3, deformation or cracking of the recess 3, the shape of the tablet 4, and the like.

  However, as shown in FIG. 7, since it is necessary to install two inspection apparatuses, a reflection inspection apparatus 6 and a transmission inspection apparatus 7, between the tablet storage process and the cover sheet application process, the prestar pack There is a concern that the production line will be enlarged. Furthermore, two sets of cameras, image input devices, and cables are required, respectively, which greatly increases equipment costs.

  Instead of installing two inspection devices, the reflective inspection device 6 and the transmission inspection device 7, foreign matter contamination, foreign tablet contamination, damage, dirt, etc. that occur during the tablet sheet packaging process with one camera Patent Document 2 proposes a sheet packaging inspection apparatus for inspection. In this sheet packaging inspection apparatus, a color camera and a light source are arranged above a part (tablet) to be packaged, and another light source is arranged below the part (tablet) to be packaged. A green transmission filter that transmits only green is provided between the upper light source and the packaged component, and a red transmission filter that transmits only red is provided between the lower light source and the packaged component. .

  When a part to be packaged with a color camera is photographed from above, the reflected image is shown in green and the transmitted image is shown in red on the same photographed image. Therefore, the reflection image and the transmission image are separated, and various abnormalities occurring in the tablet sheet packaging process are inspected using the reflection image and the transmission image.

However, the red transmitted light and the green reflected light interfere with each other, and it is difficult to separate the reflected image and the transmitted image displayed on the same captured image with high accuracy. As a result, it was difficult to inspect various abnormalities that occur during the tablet sheet packaging process with high accuracy.
Japanese Patent Laid-Open No. 2002-99898 JP-A-11-165717

  As described above, in the inspection method shown in FIG. 7, the production line for the prestar pack is enlarged, and two sets of cameras, image input devices, and cables are required, and the facility cost is greatly increased. In addition, in the technique described in Patent Document 2 using two sets of transmission filters that transmit only different colors, there is a concern that the accuracy of abnormality inspection may be reduced.

  The present invention has been made in view of such circumstances, and an electronic shutter plate that transmits or blocks light according to an external signal is interposed between the lower surface of the packaging sheet to be imaged and the light source for transmission. This makes it possible to switch between reflected images and transmitted images with a single camera in a short time, while maintaining high anomaly inspection accuracy, a small sheet that can be installed in narrow installation locations, and can be realized at low equipment costs. It aims at providing a packaging inspection apparatus.

  In order to achieve the above object, the present invention provides a sheet packaging process in which a recess is formed in a packaging sheet, a solid object is accommodated in the recess, and the surface on which the recess of the packaging sheet is formed is covered with a flat covering sheet. In a packaging sheet in a state where a solid object is housed in a recess and a sheet packaging inspection apparatus for inspecting a solid object, the packaging sheet is provided at a position facing one surface where the recess of the packaging sheet is formed. A camera for photographing the periphery, a position facing one side of the packaging sheet, a light source for reflection irradiating the recess of the packaging sheet and its periphery, and a position facing the other side of the packaging sheet , A transmission light source that irradiates the recess of the packaging sheet and its periphery, and an electronic shutter that is inserted between the other surface of the packaging sheet and the transmission light source and transmits or blocks light according to an external signal With the plate and the transmissive light source turned on, the reflective light source turned off, and the electronic shutter plate lit, the camera is driven to obtain a transmissive image of the concave portion of the packaging sheet and its surroundings. And a reflected image acquisition means for driving the camera to acquire a reflected image of the concave portion of the packaging sheet and its surroundings in a state where the light source for transmission is turned off, the light source for reflection is turned on, and the electronic shutter plate is shielded from light And a quality determination means for determining quality of the packaging sheet and solid object based on the acquired transmission image and reflection image.

  In the sheet packaging inspection apparatus configured as described above, one camera for photographing the concave portion of the packaging sheet and its periphery is provided at a position facing the one surface where the concave portion of the packaging sheet is formed. . Furthermore, an electronic shutter plate that transmits or blocks light according to an external signal is interposed between the other surface of the packaging sheet and the light source for transmission.

  Since the electronic shutter plate can be switched to light transmission or light shielding within a very short period of time, the transmission image for the concave portion storing the solid object of the packaging sheet and its periphery can be obtained with one camera at almost the same time. A reflection image can be obtained. The quality of the packaging sheet and the solid object is automatically determined based on the acquired transmission image and reflection image.

  In another invention, the electronic shutter plate in the sheet packaging inspection apparatus of the above invention is composed of a liquid crystal shutter plate that shields light when electricity is applied and transmits light when electricity is shut off, and the surface color in the light shielding state is It is a dark color almost the same color as the color of the packaging sheet.

  In another invention, the solid object in the sheet packaging inspection apparatus of the invention is a tablet.

  As described above, in the sheet packaging inspection apparatus of the present invention, an electronic shutter plate that transmits or blocks light according to an external signal is interposed between the lower surface of the packaging sheet to be imaged and the transmission light source, thereby reflecting the reflected image. The light is shielded when the image is obtained, and the light is transmitted when the transmission image is obtained.

  Therefore, the reflected image and the transmitted image can be switched and photographed in a short time with a single camera, and can be installed in a small and narrow installation place while maintaining high abnormality inspection accuracy, and can be realized at low equipment costs.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing a schematic configuration of a prestar pack manufacturing system in which a sheet packaging inspection apparatus according to an embodiment of the present invention is incorporated. The same parts as those in the sheet packaging step shown in FIG. 6 are denoted by the same reference numerals, and detailed description of the overlapping parts is omitted.

  A strip-shaped packaging sheet 2 made of, for example, substantially transparent vinyl chloride, wound around the coil 1, is rewound. In the wrapping sheet 2 that has been rewound, the recessed portions 3 are two-dimensionally formed at regular intervals in the heat suction processing machine 10. The packaging sheet 2 in which the recesses 3 are two-dimensionally formed at regular intervals is conveyed to the tablet storage machine 14 via the conveyance rollers 11, 12, and 13. The tablet storage machine 14 stores each tablet 4 as a solid object accumulated in the tablet supply hopper 14a one by one in each recess 3 formed in the packaging sheet 2 that is sequentially loaded. The packaging sheet 2 in which the tablets 4 are stored in the respective recesses 3 is guided to the pressure rolls 20a and 20b.

  The covering sheet 5 made of, for example, an aluminum foil wound around the coil 18 is guided to the pressure rolls 20a and 20b via the conveying roller 19. The pressure rolls 20 a and 20 b affix the cover sheet 5 to the surface (upper surface) of the packaging sheet 2 in the state in which the tablets 4 are stored in the recesses 3 where the recesses 3 are formed. The packaging sheet 21 to which the cover sheet 5 is attached is cut into a size including a predetermined number of tablets 4 by a cutting machine (not shown) via the conveying rollers 22 and 24 to obtain a target prestar pack 25.

  The sheet packaging inspection apparatus 26 according to the embodiment of the present invention is incorporated between the tablet storage device 14 and the pressure rolls 20a and 20b in the prestar pack manufacturing system having such a configuration. In the sheet packaging inspection apparatus 26, a color CCD camera 15 and a reflection light source (not shown) are provided above the surface (upper surface) of the packaging sheet 2 on which the concave portions 3 are formed. A liquid crystal shutter plate 17 as an electronic shutter plate and a transmission light source 16 are provided from the side of the packaging sheet 2 on the lower side of the surface (upper surface) opposite to the surface (upper surface) on which each recess 3 is formed. ing. The sheet packaging inspection device 26 inspects the upper surface of the packaging sheet 2 and the tablets 4 in the state where the tablets 4 are stored in the recesses 3.

  Furthermore, the lower surface of the packaging sheet 21 with the cover sheet 5 attached to the upper surface is photographed in a reflective manner by another camera 23 installed at a position below the lower surface in the process of passing through the conveying roller 22. The lower surface of the tablet 4 stored in the recess 3 is inspected.

FIG. 2 is a detailed configuration diagram of the sheet packaging inspection apparatus 26 incorporated between the tablet storage device 14 and the pressure rolls 20a and 20b in the prestar pack manufacturing system.
The packaging sheet 2 in which the tablets 4 are stored in the recesses 3 via the tablet storage machine 14 is conveyed at a constant speed in the direction of the arrow. A CCD camera 15 and a reflection light source 27 are provided above the upper surface of the packaging sheet 2 where the respective recesses 3 are formed. A liquid crystal shutter plate 17 and a transmission light source 16 are provided.

  The CCD camera 15 photographs the recess 3 of the packaging sheet 2 and its periphery from above. The photographing width W in the conveyance direction of the packaging sheet 2 in the CCD camera 15 corresponds to the width W of one prestar pack 25 finally obtained. More specifically, the CCD camera 15 images the range of the packaging sheet 2 that constitutes one prestar pack 25. The reflection light source 27 irradiates the photographing range of the CCD camera 15 on the upper surface of the packaging sheet 2. The transmissive light source 16 irradiates a photographing range of the CCD camera 15 of the packaging sheet 2 from below the packaging sheet 2.

  The liquid crystal shutter plate 17 has a characteristic of shielding light when electricity is applied and transmitting light when electricity is interrupted. The surface color of the liquid crystal shutter plate 17 in a light-shielded state is a dark opaque gray having the same color as the transparent light gray of the packaging sheet 2 made of vinyl chloride. The size of the liquid crystal shutter plate 17 is set larger than the photographing range of the CCD camera 15.

  A position detector 28 is provided in the conveyance path of the packaging sheet 2. The position detector 28 sends a detection signal to the counter 29 each time the recess 3 formed in the packaging sheet 2 is detected. The counter 29 sends out a count-up signal to the sequence control unit 30 composed of a computer each time detection signals for the three recesses 3 included in the photographing width W are input. In this embodiment, the count-up signal is output every about 300 ms corresponding to the conveyance speed of the packaging sheet 2.

  The sequence control unit 30 controls operations of the CCD camera 15, the reflection light source 27, the liquid crystal shutter plate 17, and the transmission light source 16 via the drive circuits 31, 32, 33, and 34.

  The color reflection image using the reflection light source 27 photographed by the CCD camera 15 is written into the reflection image memory 36 of the image buffer 35, and the color transmission image using the transmission light source 16 photographed by the CCD camera 15. Is written into the transparent image memory 37 of the image buffer 35. The reflected image written in the reflected image memory 36 and the transmitted image written in the transmissive image memory 37 are subjected to image processing by the image processing unit 38, and pass / fail judgment is performed by the pass / fail judgment unit 39 based on the image processing result. The determination result output unit 40 outputs a determination result for each prestar pack 25.

  The sequence control unit 30, the image processing unit 38, the pass / fail determination unit 39, and the determination result output unit 40 in the sheet packaging inspection apparatus 26 configured as described above perform the inspection process according to the flowchart shown in FIG.

  When the count-up signal is input from the counter 29 (S1), the sequence control unit 30 turns on the transmissive light source 16 via the drive circuit 34 (S2). Subsequently, the liquid crystal shutter plate 17 is controlled to be in an OFF state via the drive circuit 33, and the liquid crystal shutter plate 17 is set in a light transmitting state (S3). Next, the CCD camera 15 is driven to photograph the packaging sheet 2 from above (S4). The shutter speed of the CCD camera 15 is, for example, 1/4000 seconds. The image photographed by the CCD camera 15 is written as a transmissive image in the transmissive image memory 36 of the image buffer 35 (S5). Thereafter, the transmissive light source 16 is turned off (S6).

  After the elapse of 100 ms (S7), the reflection light source 27 is turned on through the drive circuit 32 (S8). Subsequently, the liquid crystal shutter plate 17 is controlled to be in an ON state via the drive circuit 33, and the liquid crystal shutter plate 17 is set in a light shielding state (S9). Next, the CCD camera 15 is driven to photograph the packaging sheet 2 (S10). An image photographed by the CCD camera 15 is written as a reflected image into the reflected image memory 37 of the image buffer 35 (S11). Thereafter, the reflection light source 27 is turned off (S12).

  As described above, a transmission image and a reflection image corresponding to one prestar pack 25 are obtained. Therefore, in S13 to S17, the image processing unit 38 and the pass / fail determination unit 39 use the transmission image and the reflection image for packaging. The quality of the sheet 2 and the tablet 4 is determined.

  In S13, foreign matter presence / absence determination on the substantially transparent packaging sheet 2 using the transmission image is performed. Specifically, the obtained two-dimensional color transmission image is monochromeized, and a differential image of a flat portion (region) other than the concave portion 3 of the packaging sheet 2 in the monochrome two-dimensional transmission image is obtained. A point (pixel position) having a large level value in the differential image indicates a point where the density has suddenly changed due to foreign matter or the like. Then, the differential image is binarized with a constant reference value, the number of pixels having a reference value or more is counted, and if the count value is greater than or equal to the limit, it is determined that foreign matter is present.

  In S14, the outer diameter dimensional quality determination of the tablet 4 using the transmission image is performed. Specifically, since the tablet 4 is opaque, the part of the tablet 4 in the transmission image is black (level = 0). Therefore, the transparent image is converted into a monochrome image, and the level of each pixel of the monochrome image is directly binarized. If the pattern of the binarized image is significantly different from the reference pattern stored in advance, the shape of the corresponding tablet 4 is determined to be abnormal.

  In S15, color quality determination of the tablet 4 using the reflection image is performed. Generally, the tablet 4 is colored in a unique color so that the patient does not accidentally take it. Since the reflected image includes a color image of the upper surface of each tablet 4 stored in the recess 3, if the color of this color image is different from a pre-stored reference color, different types of tablets 4 are mixed. Judge that you are.

  In S16, foreign matter determination on the surface of the tablet 4 using the reflection image is performed. Specifically, the obtained two-dimensional color reflection image is monochromeized, the monochrome two-dimensional reflection image is binarized, and the portion of each tablet 4 in the binarized reflection image is extracted. The contraction process shown in FIG. 4A is performed on the extracted image of the tablet 4. Even if the image of the foreign substance 41 is included in the image of the tablet 4 as shown in (a) of FIG. 4 (a) by this contraction processing, as shown in (b) of FIG. 4 (a). In addition, the image of the foreign matter 41 is not included in the image of the tablet 4 subjected to the shrinkage process.

  Next, as shown in FIG. 4B, the image of the tablet 4 before the shrinking process is subtracted from the image of the tablet 4 subjected to the shrinking process. When the subtraction process is performed, only the image of the foreign matter 41 remains. The number of pixels of the image of the foreign matter 41 is counted, and when the counted value is greater than or equal to the limit, it is determined that the foreign matter 41 is present on the surface of the tablet 4.

  In S17, the character printed on the surface of the tablet 4 using the reflection image is determined. Specifically, the obtained two-dimensional color reflection image is monochromeized, and the portion of each tablet 4 in the monochrome two-dimensional reflection image is extracted. The level (black = 0, gray = 1 to 254, white = 256) of each pixel constituting the extracted image of the tablet 4 is read, and as shown in FIG. (Histogram).

  As shown in FIG. 5, since the occurrence frequency characteristic (histogram) is different for each character, when the generated occurrence frequency characteristic (histogram) is greatly different from the pre-stored character occurrence frequency characteristic (histogram), It is determined that tablets 4 printed with different characters, that is, different types of tablets 4 are mixed. In this way, by adopting the occurrence frequency characteristic (histogram), it is possible to determine the character printed on the tablet 4 stored in various directions with respect to the recess 3.

  In addition, when the tablet 4 is accommodated in the recessed part 3 in a state where the printed character is positioned on the lower side, the sheet packaging inspection device 26 cannot determine the character. In this case, as described above, printing is performed on the lower surface of the tablet 4 which is captured by the reflection method and stored in each concave portion 3 by another camera 23 installed at a position below the lower surface in the process of passing through the conveyance roller 22. Checked characters are checked.

  In addition, the detailed technique regarding the foreign substance determination of the tablet surface using the reflection image in S16 and the printing character determination on the tablet surface using the reflection image in S17 is reported in Patent Document 1 described above.

  As described above, when the pass / fail determinations of the packaging sheet 2 and the tablet 4 in one prestar pack 25 are completed based on the transmission image and the reflection image in S13 to S17, the pass / fail determination results are output (S18).

  In the sheet packaging inspection apparatus 26 configured as described above, one CCD camera 15 and a reflection light source 27 are provided at an upper position facing the upper surface of the packaging sheet 2 where the recess 3 is formed. . Moreover, the light source 16 for transmission is provided in the lower position facing the lower surface opposite to the upper surface where the recessed part 3 of the packaging sheet 2 is formed.

  Furthermore, a liquid crystal shutter plate 17 that transmits or blocks light according to an external signal is interposed between the lower surface of the packaging sheet 2 and the light source 16 for transmission. Since the liquid crystal shutter plate 17 can be switched to light transmission or light shielding in a very short time, the CCD camera 15 and the concave portion 3 containing the tablets 4 of the packaging sheet 2 and the A transmission image and a reflection image corresponding to one prestar pack 25 with respect to the periphery can be obtained. In the image processing unit 38 and the quality determination unit 39, the quality of the packaging sheet 2 and the tablet 4 included in one prestar pack 25 is automatically determined based on the acquired transmission image and reflection image.

  Further, the surface color of the liquid crystal shutter plate 17 in a light-shielded state is a dark gray color that is almost the same color as the color of the packaging sheet 2. Generally, the packaging sheet 2 constituting the prestar pack 25 is made of vinyl chloride and has a slightly light gray color even if it is almost transparent. When taking a reflected image, the liquid crystal shutter plate 17 is shielded, and the light from the reflection light source 27 is reflected by the liquid crystal shutter plate 17. In this case, if the surface color in the light-shielding state approximates the color of the packaging sheet 2, irregular reflection on the packaging sheet 2 is suppressed, and a clear reflected image can be obtained.

  Accordingly, a clear reflected image and a transmitted image can be switched and photographed in a short time by a single CCD camera 15, and while maintaining high abnormality inspection accuracy, it is compact and pressurizing with the tablet storage device 14 in the prestar pack manufacturing system. It can be installed in a narrow installation place between the rolls 20a and 20b, and can be realized at a low equipment cost.

  In addition, this invention is not limited to embodiment mentioned above. In the embodiment, the tablets 4 are stored as solid objects in the recesses 3 of the packaging sheet 2, but it is also possible to store semiconductor chips as solid objects in the recesses 3 of the packaging sheet 2. Furthermore, in the embodiment, vinyl chloride is employed as the packaging sheet 2, but a film or glass may be employed as the packaging sheet 2.

The schematic diagram which shows schematic structure of the prestar pack manufacturing system in which the sheet packaging inspection apparatus concerning one Embodiment of this invention was integrated. Detailed configuration diagram of sheet packaging inspection apparatus according to the embodiment Flow chart showing the operation of the sheet packaging inspection device The figure for demonstrating the foreign material determination operation | movement of the surface of the tablet using the reflected image in the sheet packaging inspection apparatus The figure for demonstrating the determination operation | movement of the character printed on the surface of the tablet using the reflective image in the sheet packaging inspection apparatus Diagram showing general sheet packaging process The figure which shows the conventional sheet packing inspection device

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Packaging sheet, 3 ... Recessed part, 4 ... Tablet, 5 ... Cover sheet, 10 ... Heat suction processing machine, 14 ... Tablet storage machine, 14a ... Tablet supply hopper, 15 ... CCD camera, 16 ... Light source for transmission, 17 DESCRIPTION OF SYMBOLS ... Liquid crystal shutter plate, 23 ... Camera, 25 ... Prester pack, 26 ... Sheet packaging inspection apparatus, 27 ... Light source for reflection, 28 ... Position detector, 29 ... Counter, 30 ... Sequence control part, 36 ... Transmission image memory, 37 ... Reflected image memory, 38 ... Image processing unit, 39 ... Pass / fail judgment unit, 40 ... Determination result output unit, 41 ... Foreign matter

Claims (3)

Packaging in a state in which a recess is formed in the packaging sheet, a solid object is accommodated in the recess, and the surface on which the recess of the packaging sheet is formed is covered with a flat cover sheet in which the solid object is accommodated in the recess Sheet inspection equipment for inspecting sheets and solid objects
A camera that is provided at a position facing the one surface on which the concave portion of the packaging sheet is formed, and that photographs the concave portion of the packaging sheet and its periphery;
A reflection light source that is provided at a position facing one surface of the packaging sheet and that irradiates the recess of the packaging sheet and its periphery;
A transmission light source provided at a position facing the other surface of the packaging sheet and irradiating the recess of the packaging sheet and its periphery;
An electronic shutter plate that is inserted between the other surface of the packaging sheet and the light source for transmission, and transmits or blocks light according to an external signal;
A transmission image in which the transmission light source is turned on, the reflection light source is turned off, and the electronic shutter plate is light-transmitted to drive the camera to acquire a transmission image of the concave portion of the packaging sheet and its periphery. Acquisition means;
Reflection image acquisition that turns off the transmission light source, turns on the reflection light source, and shields the electronic shutter plate to drive the camera to obtain a reflection image of the concave portion of the packaging sheet and its surroundings. Means,
A sheet packaging inspection apparatus comprising: a quality determination unit that determines quality of a packaging sheet and a solid object based on the acquired transmission image and reflection image. The electronic shutter plate is composed of a liquid crystal shutter plate that shields light when electricity is applied and transmits light when electricity is shut off, and the surface color in the light-shielded state is a dark color that is substantially the same as the color of the packaging sheet. The sheet packaging inspection apparatus according to claim 1, wherein the sheet packaging inspection apparatus is provided. 3. The sheet packaging inspection apparatus according to claim 1, wherein the solid object is a tablet.

Images