JP2016024132A - Inspection method of packing bag and inspection device of packing bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection method of a packing bag which can exactly determine whether or not an extraction bag accommodated in the packing bag bites into a seal area, and an inspection device.SOLUTION: After photographing a packing bag 8 which is transported by a first transport conveyor 2 by a first photographing device 20, an impact is imparted to a second transport conveyor 10 which is arranged having a difference in a height with the first transport conveyor 2 by making the packing bag 8 fall on the second transport conveyor 10. After that, the packing bag 8 is photographed second time by a second photographing device 38 which is arranged at the second transport conveyor 10. Images which are photographed by the photographing devices 20, 38 in two points are sent to an appropriateness determination part 36 after being processed by an image processing part 34. By comparing the two images, when corners of an extraction bag which is accommodated in the packing bag 8 are not moved in the vicinity of a boundary of a seal area, it is determined that the extraction bag bites into a seal part, and when the corners are moved, it is determined that the extraction bag does not bite into the seal part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag inspection method and a packaging bag inspection device, and in particular, a product at a sealing portion of a packaging bag containing a product such as an extraction bag filled with food such as coffee or tea and sealed around the product. The present invention relates to a packaging bag inspection method and a packaging bag inspection device for inspecting whether or not they are bitten.

  For example, in an extraction bag production line, one that is accommodated in a packaging bag to prevent oxidation of the extraction bag is known. Thus, in order to reduce the cost of the packaging material when accommodating the extraction bag in the packaging bag, it is preferable to reduce the clearance between the extraction bag and the packaging bag, but when the clearance between the extraction bag and the packaging bag is small, When sealing the peripheral part of a packaging bag, an extraction bag may be bitten. If the extraction bag is bitten into the seal portion of the packaging bag, there is a risk that the extraction bag may be broken together when the packaging bag is broken and the extraction bag is taken out. Therefore, after the extraction bag is accommodated in the packaging bag and the peripheral edge portion is sealed, it is inspected by an inspection device whether or not the extraction bag is bitten, and the extraction bag bitten and sealed is rejected. Such an inspection apparatus is conventionally known (see, for example, Patent Document 1).

  Patent Document 1 discloses an irradiation unit that irradiates an article with X-rays, a detection unit that detects X-rays transmitted through the article, and an image creation unit that creates an X-ray transmission image based on a detection result of the detection unit. And determining means for determining the biting of the contents into the sealed portion of the package based on the X-ray transmission image, and the determining means determines the length from the outer edge of the package to the outer edge of the contents. An article inspection apparatus is described that calculates based on an X-ray transmission image and determines the biting of the content based on the calculated length.

Japanese Patent No. 5324328

  By the way, even if a packaging bag made of aluminum or a resin film is irradiated with X-rays, the boundary of the seal region where the packaging bag is welded by heat cannot be accurately recognized. The inspection apparatus described in Patent Document 1 calculates the distance between the outer edge of the package and the outer edge of the article, and determines whether or not the article accommodated in the package is caught in the seal portion. However, in the configuration described in Patent Document 1, it is difficult to determine whether or not the contents are sealed together when the contents are in contact with the seal portion of the package. There was a problem of lack of sex.

  The present invention relates to a seal inspection method for inspecting a sealing state of a packaging bag in which an article is accommodated and a region to be welded and sealed is formed, and the packaging bag containing the article is irradiated with radiation and photographed. Obtained in the first photographing step, the step of imparting an impact to the photographed packaging bag, the second photographing step of photographing by irradiating the impacted packaging bag again with radiation, and the first photographing step A pass / fail judgment step for judging pass / fail of the packaging bag from the second image and the second image obtained in the second photographing step, wherein the pass / fail judgment step is performed for the article in the packaging bag recognized from the first image. The position and the position of the article in the packaging bag recognized from the second image are compared, and the packaging bag in which the article having a portion whose position does not change is stored in the vicinity of the sealing area of the packaging bag. To judge that they are biting It is an butterfly.

  The second invention is a seal inspection device for inspecting the sealing state of a packaging bag in which an article is contained and a region to be welded and sealed is formed, and the packaging bag containing the article is irradiated with radiation. A radiation irradiating means, a photographing means for photographing the packaging bag irradiated with radiation, an impact applying means for impacting the photographed packaging bag, and a quality of the packaging bag is determined from an image obtained by the photographing means. A pass / fail judgment means, and the packaging bag which has been given an impact by the impact applying means is again irradiated with radiation and photographed, and the pass / fail judgment means is recognized from an image taken for the first time by the photographing means. Compare the position of the article in the packaging bag with the position of the article in the packaging bag recognized from the image taken the second time, and the position does not change in the vicinity of the seal area of the packaging bag The packaging bag the article is accommodated with, and is characterized in that it is determined that the article in the sealing areas are bites.

  Further, the third invention is a seal inspection apparatus for inspecting the sealing state of a packaging bag in which an article is accommodated and a region to be welded and sealed is formed, and transporting the packaging bag containing the article Means, first radiation irradiating means for irradiating the packaging bag with radiation, first imaging means for photographing the packaging bag irradiated with radiation by the first radiation irradiating means, and a packaging bag photographed by the first photographing means. An impact applying means for applying an impact, a second radiation irradiating means for irradiating radiation again to the packaging bag to which the impact is applied by the impact applying means, and a second for photographing the packaging bag irradiated with the radiation by the second radiation irradiating means. A quality determining means for determining the quality of the packaging bag from the imaging means and the first image obtained by the first imaging means and the second image obtained by the second imaging means; The position of the article in the packaging bag recognized from the first image is compared with the position of the article in the packaging bag recognized from the second image. It is characterized in that it is judged that an article is caught in the sealed region of the package bag accommodated.

  The method for inspecting a packaging bag according to the present invention is obtained by photographing the packaging bag containing the article, giving an impact to the packaging bag, then photographing the packaging bag again, and obtaining these two times. Compared to the image, it was determined whether or not the article inside moved in the vicinity of the boundary of the seal area of the packaging bag, so that it was confirmed that the article was sealed with the article in the outer bag. Can be detected. Also. The inspection device for a packaging bag of the present invention takes an image of the packaging bag irradiated with radiation from the radiation irradiating means, and gives an impact to the packaging bag, and then irradiates the packaging bag again with the imaging means. Since the second shot was taken and the quality of the packaging bag was judged by comparing the two shot images, it is possible to reliably detect that the article has been sealed in the state of the outer bag. it can.

It is a schematic block diagram which simplifies and shows the whole structure of the inspection apparatus of the packaging bag in 1st Example. It is a figure explaining the manufacturing process of a packaging bag. It is a figure explaining the process of determining whether it has bitten by the picked-up image. It is a figure which shows the test | inspection area | region of the packaging bag in 2nd Example. It is a figure which shows the picked-up image of a test | inspection area | region. It is a figure which shows the image obtained by binarizing the picked-up image shown in FIG. It is a top view which shows schematic structure of the inspection apparatus of the packaging bag in 3rd Example. It is a side view which shows the principal part of 3rd Example.

  On the upstream side of the packaging bag inspection device, a tetrahedral extraction bag having four triangular surfaces is manufactured by the filling packaging device, and the extraction bag is inserted into the exterior film by the following exterior bag manufacturing device, After the vertical and horizontal seals are made, the product is cut to form a packaging bag containing the extraction bag. This packaging bag is supplied and conveyed on the 1st conveyance conveyor of an inspection apparatus. 1st imaging which consists of the X-ray irradiation apparatus which irradiates X-rays from the upper direction to the packaging bag currently conveyed by the conveyance path of the packaging bag by a 1st conveyance conveyor, and the line camera which receives X-rays which were irradiated to the packaging bag and permeate | transmitted An apparatus is arranged, and an image photographed by the first photographing device is sent to the image processing unit of the control device for processing and sent to the pass / fail judgment unit.

  An upstream portion of the second conveyor is disposed below the downstream end of the first conveyor, and the packaging bag that has been imaged for the first time by the first imaging device is transported from the first conveyor to the second conveyor. Fall on the conveyor. The first conveyor and the second conveyor have a height difference that can give an impact to the extent that the extraction bag moves inside the dropped packaging bag. The giving means is configured.

  The packaging bag that has been impacted by dropping from the first conveyor to the second conveyor is subjected to the second imaging by the second imaging device provided on the second conveyor. This captured image is also processed by the image processing unit and then sent to the pass / fail determination unit. When the pass / fail judgment unit compares the first shot image with the second shot image, and there is a portion whose position does not change in the extraction bag accommodated in the vicinity of the boundary of the seal region in the packaging bag In this case, it is determined that there is a high possibility that the extraction bag is caught in the seal area, and the rejection is made. Further, if there is no portion whose position does not change in the extraction bag accommodated in the vicinity of the seal region in the packaging bag, it is determined that the extraction bag is non-defective because the extraction bag is not bitten in the seal region.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. A filling and packaging apparatus (not shown) is arranged upstream of the first conveyor 2 arranged on the left side of FIG. 1, and the extraction bag 4 (FIG. 2) filled with coffee and tea and sealed by this filling and packaging apparatus. Is formed and sent to an outer bag manufacturing apparatus (not shown). In the outer bag manufacturing apparatus, the longitudinal central portion of the belt-shaped outer film 6 is folded into a half-folded state (the outer film 6 is bent at the lower side 6a in FIG. 2 and the upper side 6b is opened). The extraction bag 4 is inserted into the exterior film 6 from the upper side opening 6b. After that, the exterior film 6 is vertically sealed before and after the position where the extraction bag 4 is inserted (the longitudinal seal position is indicated by reference numeral 6c), and the upper opening 6b is laterally sealed (the horizontal seal position is indicated by reference numeral 6d). After that, the packaging bag 8 (see the right end in FIG. 2) in which the extraction bag 4 is accommodated and the periphery is sealed is formed by cutting at the vertical sealing position 6c. The cut packaging bag 8 is supplied to the packaging bag inspection apparatus 1 according to this embodiment. The extraction bag 4 accommodated in the packaging bag 8 is a so-called triangular pack and has a tetrahedron shape having four triangular faces, and is folded into two by a folding means (not shown) to the exterior film 6. Inserted. Further, the hanging thread S with the tag T attached to the outer surface is attached to the triangular pack.

  The packaging bag inspection apparatus 1 according to this embodiment includes a first conveying means (first conveying conveyor 2) and a second conveying means in which an upstream end 10a is disposed below the downstream end 2a of the first conveying conveyor 2. (Second conveyor 10). The first conveyor 2 includes an upstream pulley (not shown) and an endless belt 14 wound around a downstream pulley 12, and a packaging bag 8 containing articles is placed on the belt 14. Transport. Further, the second conveyor 10 has an endless belt 18 wound around an upstream pulley 16 and a downstream pulley (not shown), and the packaging bag 8 is placed on the belt 18 and conveyed. . The first transport conveyor 2 and the second transport conveyor 10 are configured such that when the packaging bag 8 transported by the first transport conveyor 2 falls from the downstream end 2a onto the second transport conveyor 10 below, the packaging bag 8 It has a height difference that gives an impact to the extent that the extraction bag 4 accommodated therein moves. In this embodiment, the impact applying means 11 is constituted by the height difference between the first transfer conveyor 2 and the second transfer conveyor 10.

  A first imaging device 20 is arranged on the packaging bag conveyance path of the first conveyor 2 to irradiate the packaging bag 8 conveyed on the first conveyor 2 with radiation (X-rays in this embodiment). ing. The first imaging device 20 detects a first X-ray irradiation device 22 disposed above the transport surface of the first transport conveyor 2 and an X-ray disposed below the transport surface and transmitted through the packaging bag 8. The first line camera 24 is provided. A first sensor 26 for detecting the packaging bag 8 conveyed on the first conveying conveyor 2 is arranged slightly upstream of the position where the first photographing device 20 is arranged. When the packaging bag 8 is detected, a command signal is sent from the command unit 30 of the first control device 28 to the first X-ray irradiation device 22, and the packaging bag 8 is irradiated with X-rays. The transport position of the packaging bag 8 by the first transport conveyor 2 is always detected by the encoder 32. When the packaging bag 8 reaches the position of the first X-ray imaging apparatus 20 by the signal from the encoder 32, the first X X-rays are irradiated from the beam irradiation device 22. Instead of the line camera 24, an area camera may be used.

  The image detected by the first line camera 24 of the first photographing unit 20 is sent to the image processing unit 34 of the first control device 28, and after being subjected to predetermined processing, sent to the pass / fail judgment unit (pass / fail judgment unit 36). It is done.

  An upstream pulley 16 of the second transport conveyor 10 is disposed below the downstream pulley 12 of the first transport conveyor 2, and the packaging bag 8 that has passed through the downstream pulley 12 of the first transport conveyor 2 2 Dropped to the upstream end of the conveyor 10 and received. A second imaging device 38 that images the packaging bag 8 being conveyed is disposed in the packaging bag conveyance path of the second conveyance conveyor 10. The second imaging device 38 detects the X-rays that are disposed below the transport surface of the second transport conveyor 10 and the second X-ray irradiation device 40 disposed below the transport surface and have passed through the packaging bag 8. A second line camera 42 is provided. A second sensor 44 that detects the packaging bag 8 that is conveyed is disposed slightly upstream of the position where the second imaging device 38 is disposed. When the second sensor 44 detects the packaging bag 8, A command signal is sent from the second command unit 31 of the second control device 29 to the second X-ray irradiation device 40, and the packaging bag 8 is irradiated with X-rays. The transport position of the packaging bag 8 by the second transport conveyor 10 is always detected by the encoder 46. When the packaging bag 8 reaches the position of the second imaging device 38 by a signal from the encoder 46, the second X-ray is detected. X-rays are irradiated from the irradiation device 40.

  The image detected by the second line camera 42 of the second imaging device 38 is sent to the second image processing unit 35 of the second control device 29 and subjected to a predetermined process, and then a pass / fail judgment means (a pass / fail judgment unit 36). ). The image sent from the first photographing device 20 and the image from the second photographing device 38 that photographed the same packaging bag 8 are compared, and the pass / fail judgment unit 36 makes the judgment. The packaging bag 8 determined to be a non-defective product by the pass / fail determination unit 36 is transported by the second transport conveyor 10 as it is and sent to the next step. In addition, a reject device 48 is disposed downstream of the second conveyor 10, and the packaging bag 8 determined to be defective by the pass / fail determination unit 36 is sent from the reject signal output unit 50 to the reject device 48. Rejected by the received signal.

  In this embodiment apparatus, in the step of creating the packaging bag 8 containing the extraction bag 4, the longitudinal and lateral seals 6c and 6d of the exterior film 6 are cut and then cut off. It is inspected whether or not the extraction bag 4 is biting into the seal region (the portion where the seals 6c and 6d are applied, which are blacked out in FIG. 2). For example, when the extraction bag 4 is accommodated in the state shown in FIG. 3A (the corners A, B, and C of the extraction bag 4 are not engaged with the seal regions 6c and 6d of the packaging bag 8). Is a non-defective product, and if it is bitten, it is judged as a defective product. For this purpose, the packaging bag 8 once photographed by the first photographing device 20 is dropped from the first conveying conveyor 2 to the second conveying conveyor 10 to give an impact to the packaging bag 8, and then the same packaging by the second photographing device 38. A second image of the bag 8 is taken and these two images are compared.

  When the photographed image by the first photographing device 20 is FIG. 3A and the photographed image by the second photographing device 38 after impacting the same packaging bag 8 is in the state of FIG. The image shown in FIG. 3A taken by the first photographing device 20 is taken by the second photographing device 38 after the first image processing unit 34 calculates the coordinates of the three corners A, B, C of the extraction bag 4. In FIG. 3B, the second image processing unit 35 calculates the coordinates of the three corners A, B, and C of the extraction bag 4. These image data are sent to the pass / fail judgment unit 36, which compares the two image data and provides the three corners A, B, C of the extraction bag 4 accommodated in the packaging bag 8. And the extraction bag 4 is determined to be a non-defective product by determining that the extraction bag 4 is not bitten by the sealing regions 6c and 6d of the packaging bag 8 at all.

  Also, the image of the packaging bag 8 photographed by the first photographing device 20 is in the state shown in FIG. 3C, and the image photographed by the second photographing device 38 after impacting the same packaging bag 8 is shown in FIG. In the state shown in FIG. 3D, the image taken by the first photographing device 20 is the coordinates of the three corners A, B, C of the extraction bag 4 in the first image processing unit 34. In FIG. 3D, the coordinates of the three corners A, B, and C of the extraction bag 4 are calculated in the second image processing unit 35. In the pass / fail judgment unit 36, both the image data are compared, and among the three corners A, B, C of the extraction bag 4, the two corners B, C are moving, but the seal region 6 Since the coordinates of the corner A located in the vicinity have not moved, it is determined that there is a high possibility that the extraction bag 8 is caught in the seal region 6 of the bandage bag 8.

  4 to 6 are diagrams showing the steps of the second embodiment in which the image processing different from that of the first embodiment is performed to determine the bite. In the image processing described in the first embodiment, three coordinates are calculated from the images of the extraction bag 4 photographed by the first photographing device 20 and the second photographing device 38, and the comparison is performed. Then, an inspection region is set in the obtained image, and it is determined whether or not the extraction bag 4 is bitten by the position of the extraction bag 4 existing in the inspection region. The second embodiment is different from the first embodiment only in image processing, and the other configurations are the same.

  FIG. 4 is a diagram showing an inspection area. An image captured by the first imaging device 20 and the second imaging device 38 is set by the first image processing unit 34 and the second image processing unit 35. Specifically, a value obtained by adding a few millimeters to an area inside a predetermined value from the outer edge of the packaging bag 8, for example, an area to be sealed in consideration of variations in the seal area is set as the seal area. In this embodiment, the setting of the horizontal seal area 6d is 5 mm, and 2 mm is added to 5 mm, and an area 7 mm from the outer edge of the horizontal seal area 6d is used as the horizontal seal inspection area. Further, the setting of the vertical seal region 6c is 3 mm, and 2 mm is added to 3 mm, and a region 5 mm from the outer edge of the vertical seal region 6c is set as the inspection region. In FIG. 4, the hatched portion is the inspection region where the horizontal seal and the vertical seal are combined, the line L1 visible in the inspection region indicates the boundary line of the expected horizontal seal, and L2 indicates the boundary line of the expected vertical seal Yes. The first image processing unit 34 and the second image processing unit 35 set an inspection area from the obtained image, and whether or not the extraction bag 4 exists in the inspection area and in which position it exists. calculate.

  When the photographed image by the first photographing device 20 is FIG. 5A and the photographed image by the second photographing device 38 after impacting the same packaging bag 8 is in the state of FIG. The one image processing unit 34 sets an inspection region in the image FIG. 5A and performs binarization processing. In FIG. 5A, since the extraction bag 4 exists in the P portion and the Q portion in the inspection area, when the binarization process is performed, the portion where the extraction bag 4 exists is black as shown in FIG. 6A. Is displayed. In addition, in the second image processing unit 35, an R region where the extraction bag 4 is present is displayed in black by setting an inspection region in the image FIG. The image of b) is obtained.

  In the pass / fail judgment unit 36, the extraction bag 4 is bandaged by performing differential processing on the image data of FIGS. 6A and 6B sent from the first image processing unit 34 and the second image processing unit 35. It is determined whether or not the bag 8 is moving. FIG. 6C is an image obtained by performing difference processing between FIG. 6A and FIG. 6B, but the portion displayed in black in FIG. Recognize that it has moved. On the other hand, in the Q part, only a small part remains among the parts displayed in black in FIGS. 6A and 6B, so that most of the extraction bag 4 moves in the Q part. Recognize not. As described above, when the extraction bag 4 is recognized in the examination region of the image by the first imaging device 20 and is subjected to differential processing from the image by the second captured image 38, it is recognized that there is a portion that has not moved to the extraction bag 4. It is determined that there is a possibility that the extraction bag 4 in the packaging bag 8 is stuck in the seal region.

  It is also possible to detect the biting of the tag T and the hanging thread S of the triangular pack. Further, the shape of the extraction bag 4 may be an extraction bag having a shape other than the triangular pack.

  FIG. 7 is a view showing a packaging bag inspection apparatus 101 according to the third embodiment. In the first embodiment, a first photographing device 20 for photographing the packaging bag 8 containing the extraction bag 4 is provided on the first conveying conveyor 2, and the same packaging bag 8 is photographed on the second conveying conveyor 10. The second photographing device 38 is provided, and the height difference between the first transport conveyor 2 and the second transport conveyor 10 is used as the impact applying means 11 to give an impact. The apparatus according to the third embodiment In this case, photographing is performed twice by one photographing device.

  An imaging device 122 equipped with an X-ray irradiation device and a line camera similar to those in the first embodiment is arranged on the transport path of the transport conveyor 102 that transports the packaging bag 108 containing the product such as an extraction bag inside, The packaging bag 108 conveyed from the upstream side is irradiated with X-rays and photographed to obtain an inspection image. A camera 124 is disposed downstream of the imaging device 122 and detects the position of the packaging bag 108 that is transported on the transport conveyor 102. Further, a robot 152 as an impact applying unit is disposed on the side of the conveyor 102, and the packaging bag 108 that has been photographed by the photographing device 122 (first photographing) based on a signal from the camera 124 is taken up. The impact is given by shaking several times (see FIG. 8).

  Return conveyors (first return conveyor 154A, second return conveyor 154B, third return) that can transport the packaging bag 108 from the downstream side to the upstream side of the position where the imaging device 122 and camera 124 of the conveyor 102 are disposed. A conveyor 154C) is provided. The packaging bag 108 that has been subjected to the first shooting and is given an impact by the robot 152 is placed on the first return conveyor 154A by the robot 152, conveyed by the first return conveyor 154A, and then the second return conveyor 154B. And sequentially conveyed by the third return conveyor 154C and returned to the upstream side of the X-ray irradiation device 122 of the conveyor 102.

  The packaging bag 108 to which the impact is applied is irradiated with X-rays by the imaging device 122 and, after the second imaging, is carried by the conveyor 102 as it is downstream. The packaging bag 108 that has been imaged twice in this way is processed by an image processing unit (not shown) and then sent to a pass / fail judgment unit to compare the captured images twice. As in the first embodiment and the second embodiment, if the position of a part of the extraction bag accommodated inside the packaging bag 108 does not change in the vicinity of the seal region, it is determined that it is bitten, If the position has changed, it is determined that the bite is not bitten.

  In the image processing of the first embodiment and the second embodiment, the extraction bag 4 folded in two is assumed to have a triangle for convenience of explanation. However, the extraction bag 4 does not actually become a triangle, and if it is folded properly, the home It becomes the shape of the base. Further, when the extraction bag 4 is not properly folded, the corners are shifted and the image becomes a complex polygon.

4 Goods (extraction bags)
6c Area to be welded and sealed 6d Area to be welded and sealed 8 Packaging bag 11 Impact applying means 22 Radiation irradiation means (first X-ray irradiation apparatus)
24 Shooting means (first line camera)
36 Pass / fail judgment means 40 Radiation irradiation means (second X-ray irradiation apparatus)
42 Imaging means (second line camera)

Claims (3)

A seal inspection method for inspecting the sealing state of a packaging bag in which an article is contained and a region to be welded and sealed is formed,
A first imaging step of irradiating and photographing a packaging bag in which an article is stored, a step of imparting an impact to the photographed packaging bag, and irradiating again and irradiating the packaging bag to which the impact is imparted A second imaging step, a quality determination step of determining the quality of the packaging bag from the first image obtained in the first imaging step and the second image obtained in the second imaging step,
The pass / fail judgment step compares the position of the article in the packaging bag recognized from the first image with the position of the article in the packaging bag recognized from the second image, and the position is near the seal region of the packaging bag. A method for inspecting a packaging bag, characterized in that a packaging bag containing an article having an unchanging part is judged to be bitten in a seal region. A seal inspection device for inspecting a sealing state of a packaging bag in which an article is contained and a region to be welded and sealed is formed,
A radiation irradiating means for irradiating a packaging bag containing an article, a photographing means for photographing the packaging bag irradiated with radiation, an impact applying means for giving an impact to the photographed packaging bag, and the photographing means. Quality determination means for determining the quality of the packaging bag from the image,
The packaging bag that has been given an impact by the impact applying means is imaged by irradiating radiation again, and the quality determination means is the position of the article in the packaging bag that is recognized from the first image taken by the imaging means. And the position of the article in the packaging bag recognized from the image taken for the second time, and the packaging bag containing the article having a portion whose position does not change in the vicinity of the sealing area of the packaging bag. An inspection device for a packaging bag, characterized in that it is determined that an article is bitten. A seal inspection device for inspecting a sealing state of a packaging bag in which an article is contained and a region to be welded and sealed is formed,
Conveying means for conveying the packaging bag containing the article, first radiation irradiating means for irradiating the packaging bag with radiation, first imaging means for photographing the packaging bag irradiated with radiation by the first radiation irradiating means, An impact applying means for applying an impact to the packaging bag photographed by the first imaging means, a second radiation irradiating means for irradiating the packaging bag to which the impact has been applied by the impact applying means, and a radiation by the second radiation irradiating means. The second imaging means for imaging the packaging bag irradiated with the light, the quality determination means for determining the quality of the packaging bag from the first image obtained by the first imaging means and the second image obtained by the second imaging means And
The quality determination means compares the position of the article in the packaging bag recognized from the first image with the position of the article in the packaging bag recognized from the second image, and the position is in the vicinity of the seal region of the packaging bag. An inspection apparatus for a packaging bag, characterized in that a packaging bag in which an article having an unchanging part is accommodated is judged that the article is caught in a seal region.

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