JP2017111017A - Seal checker and packaging machine having the seal checker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal checker that is small in size and is low in price, can inspect a wide area, has an excellent detection accuracy, can detect an extremely small change in shavings of dried bonito, for example, and accurately detect a defective seal bag if the seal bag is made of a colored packaging film as long as the film transmits light, and a packaging machine having the seal checker.SOLUTION: The seal checker 1 according to the present invention is for detecting defective seal bags in a packaging machine, and includes: a color camera 2, arranged on one side of a package 80, including a translucent packaging bag and an object packaged by the bag, with a passage in between, and acquiring an image of the package 80; an illumination unit 3, arranged on the other side of the package 80 with the passage in between; a passage sensor 4 that detects passing of the package 80; and a controller 5 that processes the image acquired by the color camera 2 and detects a detective seal.SELECTED DRAWING: Figure 1

Description

  The present invention detects a defective sealing bag in a packaging machine (a product to be packaged that has a bite or wrinkle at the seal site, a product that is sealed at an angle, such as a product that is obliquely sealed). The present invention relates to a seal checker suitable for use and a packaging machine including the same.

  Conventionally, as a seal checker for detecting a defective seal bag in a packaging machine, a seal checker that detects an LED light source with an analog sensor has been the mainstream, and a seal checker that detects with a line sensor has also been proposed ( For example, Unexamined-Japanese-Patent No. 2009-162685).

  However, since the former seal checker uses a phenomenon in which a defect such as a foreign substance passing between the LED light source and the light receiving element creates a shadow and the amount of light decreases, the inspection area is small and the detection sensitivity is unstable. It was.

  On the other hand, the latter seal checker has a very high performance in continuously shooting the moving package, but the camera, lens and illumination are expensive, the sensor part is also large, and production It was necessary to provide a large space for inspections in the equipment. In addition, when backlight illumination was used, defects were determined by detecting shadows that block the light, so subtle color changes such as shavings could not be detected. Furthermore, detection was difficult in the case of colored packaging films.

JP 2009-162685 A

  Therefore, the problem of the present invention is that it is small and inexpensive, has a wide inspection area and excellent detection sensitivity, and can detect subtle color changes such as shavings. An object of the present invention is to provide a seal checker capable of detecting a seal bag and a packaging machine including the seal checker.

  What achieves the above-mentioned object is a seal checker for detecting a defective seal bag in a packaging machine, which is disposed on one side across a passage of a package body in which a packaged object is packaged with a translucent packaging bag. Acquired by a color camera for acquiring an image of the body, an illumination unit arranged on the other side across the passage of the package, a passage sensor for detecting the passage of the package, and the color camera And a control unit that detects an image of the defective seal bag by processing an image.

  It is preferable that the control unit controls the color camera so that images of the package are sequentially acquired at predetermined distances along the sealing direction of the package. The control unit, when acquiring images of the packaging body sequentially at a predetermined distance along the sealing direction of the packaging body with the color camera, stops photographing only at the sealing portion of the packaging body and It is preferable to control to acquire an image. Preferably, the control unit detects the defective seal bag by combining the images into one image when the inspection width of the package is reached. The control unit converts an image value in an RGB color space of an image acquired by the color camera into an image value L *, a *, b * in CIEXYZ-color space, and the L *, a *, b * image. It is preferable that the defective sealing bag is detected based on the value. It is preferable that the control unit performs a noise component removal process for removing minute defects from the image acquired by the color camera. It is preferable that the control unit performs a defect recognition process for combining defects when there is continuity in the defect of the image acquired by the color camera. It is preferable that the illumination unit is configured with narrow directional illumination. The seal checker includes a package passage, the color camera arranged on one side of the package passage, an illumination unit arranged on the other side of the package passage, and the passage sensor. It is preferable to have an elongated body. It is preferable that the seal checker has a touch panel and is configured to be able to input and set a color corresponding to an object to be bitten from the touch panel.

  Moreover, what solves the said subject is a movable body for intermittently moving the grip pair for each of a plurality of processes, and a pair of grips for gripping the translucent packaging bag. A filling machine for filling an object to be packaged in the translucent packaging bag held by the grip pair, and a packaging body in which the article to be packaged is filled in the translucent packaging bag by the filling machine. A packaging machine comprising a sealing device for sealing the vicinity of a bag mouth and the seal checker according to any one of claims 1 to 3.

According to the seal checker according to claim 1, a colored packaging film that is small and inexpensive, has a wide inspection area, is excellent in detection sensitivity, can detect subtle color changes such as shavings, and can transmit light. But it can be detected accurately.
According to the seal checker according to claim 2, since the image of the package is obtained by dividing the width of the image that can be photographed at a time and continuously photographing at a high speed, even a small and inexpensive color camera has high resolution. Therefore, it is possible to perform more than a line sensor and a large camera, and to detect a defective seal bag with high accuracy.
According to the seal checker of the third aspect, the image capturing speed of the package can be further increased, and the defective seal bag can be detected more quickly by further shortening the image acquisition time.
According to the seal checker according to claim 4, in order to comprehensively determine whether or not it is a defective seal bag by synthesizing the image at the time when the inspection width of the package is reached, not for each acquired image, A defective seal bag can be detected quickly.
According to the seal checker according to claim 5, a defective seal bag not sealed at a predetermined position such as an oblique seal with L * (lightness) is detected, and a * (red / green) or b * (Yellow / Blue) can detect a defective sealing bag in which a bite of the package is present at the sealing portion, and can detect them simultaneously.
According to the seal checker described in claim 6, it is possible to remove a minute defect from a photographed image and to keep only a component to be an actual defect target, thereby suppressing a decrease in processing speed due to a large number of defects. And variation in color and shape can be smoothed.
According to the seal checker of the seventh aspect, it is possible to more reliably detect the bite of the package by detecting the continuity of the defective part and combining the defect.
According to the seal checker of the eighth aspect, it is possible to more clearly project defects such as an edge of the package and a bite in the image, and to further improve the detection accuracy.
According to the seal checker described in claim 9, it can be easily installed by inserting the long body into the packaging machine, and adjustment such as focus adjustment and position adjustment can be performed at the manufacturing stage of the packaging machine. It can be unnecessary.
According to the seal checker of the tenth aspect, the setting can be changed according to the color of the package to be bitten, and various types of biting can be detected more reliably.
According to the packaging machine of the eleventh aspect, even a subtle color change such as a shaving node can be detected, and a defective sealing bag can be accurately detected even with a colored packaging film as long as light can be transmitted.

It is a plane schematic diagram of one example of a seal checker of the present invention. It is a right view of the elongate body of the seal checker shown in FIG. It is a flowchart for demonstrating the detection process of the defective seal bag by the seal checker shown in FIG. It is explanatory drawing for demonstrating the image acquisition process by the seal checker shown in FIG. It is explanatory drawing for demonstrating the image acquisition process by the seal checker shown in FIG. It is explanatory drawing for demonstrating the color filter process process by the seal checker shown in FIG. It is the plane schematic of one Example of the packaging machine of this invention. It is a partial top view for demonstrating the arrangement position of the elongate body of a seal checker in the packaging machine shown in FIG. FIG. 8 is an enlarged plan view of the vicinity of an elongated body of a seal checker in the packaging machine shown in FIG. 7. FIG. 8 is an enlarged right side view of the vicinity of an elongated body of a seal checker in the packaging machine shown in FIG. 7.

  In the present invention, the color camera 2 for acquiring an image of the packaging body 80 disposed on one side with the passage of the packaging body 80 in which the packaged object is packaged by the translucent packaging bag, and the passage of the packaging body 80 are sandwiched. It has the illumination part 3 distribute | arranged to the other side, the passage sensor 4 for detecting the passage of the package 80, and the control part 5 which processes the image acquired with the color camera 2, and detects a defective sealing bag. In addition, it is small and inexpensive, has a wide inspection area and excellent detection sensitivity, can detect subtle color changes such as shavings, and can accurately detect defective seal bags even with colored packaging films, as long as it can transmit light. The seal checker 1 and the packaging machine 30 including the seal checker 1 were realized.

A seal checker according to the present invention will be described with reference to an embodiment shown in FIGS.
As shown in FIG. 1, the seal checker 1 of this embodiment is a seal checker for detecting a defective seal bag in a packaging machine, and is a path of a package 80 in which an article to be packaged is packaged with a translucent packaging bag. A color camera 2 that is arranged on one side of the camera to acquire an image of the package 80, an illumination unit 3 that is arranged on the other side of the package 80, and detects the passage of the package 80 It has a passage sensor 4, a control unit 5 that processes an image acquired by the color camera 2 and detects a defective seal bag, and a touch panel 6. Hereinafter, each configuration will be described in detail.

  The defective seal bag in the packaging machine 30 is a defective product in the seal part (lateral seal part) 81 formed so as to extend in the horizontal direction in the upper part of the package 80, and the biting piece made of a shaving node in the seal part 81. In addition to the defective sealing bag in which there are or wrinkles, when the grip pair 31 grips the translucent packaging bag, the defective sealing bag when the gripped position is too high, the defective sealing bag when it is too low, or This is a defectively sealed bag that is obliquely sealed when the level of the gripped position is different between right and left. The seal checker 1 of this embodiment can detect them simultaneously.

  The color camera 2 is for capturing and acquiring an image of the package 80, and a color CCD camera is used in this embodiment. In this way, in the seal checker of the present invention, by using the color camera 2 and judging the color in addition to the difference in shadow and brightness, it is possible to determine whether it is due to the influence of illumination or disturbance, or a defect due to biting. It was possible to distinguish clearly and the detection accuracy was greatly improved. In particular, it is possible to detect a biting target of a delicate color such as a shaving node with high accuracy.

  As shown in FIG. 1, the color camera 2 is arranged on one side with a passage of a package 80 in which an article to be packaged is packaged with a translucent packaging bag.

  The illuminating unit 3 is for illuminating the package 80 to make the biting and edges at the seal portion 81 of the package 80 clearer. As shown in FIG. Arranged on the side.

  The illuminating unit 3 of this embodiment is configured by a narrow directivity of white LED with high straightness, thereby making it possible to more clearly show defects such as edges and biting of the package 80 in the image, and detection accuracy. Can be further improved. More specifically, normal surface illumination for backlights radiates light from the light emitting surface in all directions, so even if there is a foreign object between the illumination and the camera, the surrounding light will make the shadows thinner. Although there is a property, the light of the narrow directional illumination is strongly emitted only by the light of the vertical component with respect to the light emitting surface, so that the shadow can be clearly seen even with the surface illumination.

  Also, as shown in FIG. 2, by setting the lens 7 arranged in front of the color camera 2 to be a camera set to shoot from a far position with a telephoto focal length, the lens angle of view is reduced, and the package 80 By making it difficult for light other than light in the direction perpendicular to the photographing surface to enter, the characteristics of straight light of narrow directivity illumination are enhanced.

  The passage sensor 4 is for detecting the passage of the package 80, and when the passage sensor 4 receives a detection signal for detecting the front edge of the package 80, the color camera 2 acquires an image. Configured to start. More specifically, by synchronizing the timing at which the passage sensor 4 detects the leading edge of the package 80 and the start of image acquisition by the color camera 2, the image can be displayed even when the package 80 is conveyed at high speed. It is configured so that it can be acquired reliably.

  The control unit 5 is for processing images acquired by the color camera 2 to detect defective seal bags and to control each unit when detecting defective seal bags.

  The control unit 5 includes an image memory and an image processing unit. Images sequentially sent from the color camera 2 are stored in the image memory, and these images are sent to the image processing unit to synthesize the entire image. To control.

  Further, as shown in FIG. 2, the seal checker 1 of this embodiment includes a packaging body passage 8, a color camera 2 disposed on one side of the packaging body passage 8, and the other side of the packaging body passage 8. It has the elongate body 9 provided with the illumination part 3 distribute | arranged to, and the passage sensor 4. FIG. By having such a long body 9, it can be easily installed by inserting the long body 9 into a packaging machine, and adjustments such as focus adjustment and position adjustment can be made at the manufacturing stage of the packaging machine, Adjustment is also unnecessary.

  Further, as shown in FIG. 1, the seal checker of this embodiment has a touch panel 6, and is configured to be able to input and set colors corresponding to the packages to be bitten from the touch panel 6. Thereby, a setting can be changed according to the color of the package to be bitten, and biting can be detected more accurately.

Next, a defective seal bag detection process by the seal checker 1 of the present invention will be described.
As shown in FIG. 1, when the seal checker 1 of the present invention is installed in the packaging machine 30, the passage sensor 4 monitors the passage of the package 80 as shown in FIG. 3. At the same time as the passage sensor 4 detects the front edge of the package 80 in the conveying direction, the color camera 2 captures images of the package 80 and sequentially stores them in the image memory of the controller 5.

  Specifically, as shown in FIG. 4, this image is acquired by the control unit 5 using the color camera 2 along a sealing direction of the package 80 (in the direction of the arrow in FIG. 4) for a predetermined distance (in FIG. 4). Distance in the horizontal direction: Distance in the width direction of the packaging body 80: Acquisition of the image of the seal part 81 by controlling to sequentially acquire the images a1, a2, a3, a4, and a5 of the packaging body 80 for each w1). Is performed (S1 in FIG. 3).

  In this embodiment, the entire image of the seal portion 81 of the package is taken with five images a1, a2, a3, a4, and a5. In this way, the image of the package can be divided and acquired by reducing the width that can be shot at a time and continuously shooting at high speed, so even a small and inexpensive color camera has higher resolution than a line sensor or large camera Thus, it is possible to detect a defective seal bag with high accuracy. Furthermore, the processing (s1 to s5) until the image acquisition and defect combination in this embodiment is performed at a higher speed by simultaneously performing two screens in parallel as shown in FIG.

  Furthermore, when the control unit 5 of this embodiment acquires images of the packaging body 80 at predetermined distances sequentially along the sealing direction of the packaging body 80 with the color camera 2, as shown in FIG. Control is performed so as not to capture the image until the last (h1), but to stop capturing in the vicinity of the seal portion 81 (h2) of the package 80 and sequentially acquire the next image.

  Specifically, in order to efficiently photograph only the seal portion 81, the control unit 5 has images b1, b2, b3, b4, and b5 (the height of the seal portion 81 being short) in the height direction of the package 80. The image corresponding to the distance in the vertical direction) is sequentially acquired. Thereby, the image capturing speed of the package 80 can be further increased, and the defective sealing bag can be detected more quickly by reducing the image acquisition time.

  Next, as shown in FIG. 6, the control unit 5 converts the image values in the RGB color space of the images b1, b2, b3, b4, and b5 acquired by the color camera 2 into CIEXYZ-color space image values L *, The color image is filtered for inspection by converting it into a *, b * and L *, a *, b * image values (S2 in FIG. 3). This process makes it possible to detect defective seal bags that are not sealed in place, such as L * (brightness) with high or low problems, wrinkles, or slanted seals. , A * (red / green) or b * (yellow / blue) makes it possible to detect a defective sealing bag in which a bite of an object to be packaged is present in the seal portion 81, and to detect them simultaneously. In this embodiment, since the biting target is a cutting node, biting is detected by b * (yellow / blue) corresponding to the color, and a * (red / green) is not used.

  Further, the control unit 5 detects the edge of the package 80, calculates the inspection range (S3 in FIG. 3), and then removes a small defect (packing mark or the like) from the image acquired by the color camera 2. A component removal process (S4 in FIG. 3) is performed. As a result, minute defects are removed from the photographed image, and only the components that are the actual defects are left, so that it is possible to suppress a decrease in processing speed due to a large number of defects, and color and shape variations. Can be smoothed.

  After that, the control unit 5 performs a defect recognition process (S5 in FIG. 3) for combining the defects when there is continuity in the defects of the image acquired by the color camera 2. Thereby, it is possible to detect the biting of the packaged item more accurately by detecting the continuity of the defective portion and combining the defects.

  Then, the control unit 5 combines the images into one image when the inspection width of the package 80 is reached. That is, instead of each acquired image, when the inspection width of the package is reached, the images are combined to comprehensively determine whether or not the bag is a defective seal bag (S6 in FIG. 3). A bag can be detected. It should be noted that detection of a defective sealing bag not sealed at a predetermined position, such as a problem with height, a wrinkle, or a slanted seal, is performed by the inspection position standard L shown in FIG. Judgment is made by comparing with the synthesized image.

Next, the packaging machine of the present invention will be described with reference to one embodiment shown in FIGS.
The packaging machine 30 of this embodiment includes one or a plurality of grip pairs 31 for gripping a translucent packaging bag, moving bodies 32A and 32B for intermittently moving the grip pair 31 for each of a plurality of steps, and a moving body 32A. , 32B, a filling machine 33 for filling the packaging material into the translucent packaging bag held by the grip pair 31 intermittently moved by the grip 32, and filling the translucent packaging bag with the filling machine 33 The sealing device 34 for sealing the vicinity of the bag mouth of the package 80 and the seal checker 1 are provided. Hereinafter, although each structure is explained in full detail, about the seal checker 1, it is as above-mentioned, The same code | symbol is attached | subjected to the same structure site | part, and description is abbreviate | omitted.

  The packaging machine 30 of this embodiment is a gas-filling type packaging machine that fills an object to be packaged (shaving nodes) in an optically transparent packaging bag and fills an inert gas (nitrogen gas).

  As shown in FIG. 7, the packaging machine 30 has a package filling table 32A and a gas filling table 32B. On the package filling table 32A side, a bag feeding process, a bag opening process, and a package filling process are performed. The process and the delivery process are performed at the first to seventh stations, and then, on the gas filling table 32B side, the delivery process (the eleventh process) for delivering the package 80, and the gas nozzle insertion for inserting the gas nozzle into the translucent packaging bag Process (12th process), gas filling / brushing process (13th process to 18th process), sealing process by seal device 34 (19th process), seal cooling process (20th process), seal inspection process and product discharge process (Step 21) is performed at the 11th to 21st stations.

  The packaging machine 30 is provided with a stand for freely supporting an intermittent rotating shaft (not shown) extending in the vertical direction on the machine base, and a movable body (packaging filling) mounted on the upper portion of the intermittent rotating shaft. On the table 32A and the gas filling table 32B), a pair of grips (bag gripping means) 31 for gripping or releasing the translucent packaging bag is projected radially at equal angular intervals around the intermittent rotation axis. Is provided. The grip pair 31 grips the vicinity of both sides of the bag mouth of the translucent packaging bag, and moves intermittently together with the moving body (packaging object filling table 32A, gas filling table 32B) for each packaging process. In addition, although this Example is a rotary type packaging machine which drives a mobile body (packaging material filling table 32A, gas filling table 32B) intermittently, this invention is applied to a well-known linear movement type packaging machine. Is also possible.

  The filling machine 33 fills the object to be packaged (the shaving node in this embodiment) into the translucent packaging bag gripped by the grip pair 31 that is intermittently moved by the movable body (object filling table 32A). Yes, it is arranged at the third station where the package filling process (third process) is performed. The filling machine 33 is a known filling machine, and is set so as to fill a set amount of shavings for each of the translucent packaging bags held by the grip pair 31 that has been intermittently moved to the third station.

  The sealing device 34 is for sealing a translucent packaging bag filled with an article to be packaged and an inert gas in the vicinity of the bag mouth, and is disposed at the 19th station where the 19th step is performed. The translucent packaging bag supported by 31 has a pair of sandwiching bodies (horizontal bars) that sandwich and seal the vicinity of the bag mouth from the front and back. The pair of sandwiching members is constituted by heat blocks that are in close contact with the translucent packaging bag from the front and back by a reciprocating mechanism (not shown), and the translucent packaging bag stopped at the 19th station where the 19th step is performed. Is sandwiched between a pair of clamping bodies so that the clamping portion is sealed.

  The seal checker 1 is a defective seal bag in which a biting piece or crease made of a cut node is present at the seal part 81, and a defective seal bag when the gripped position is high when the grip pair 31 grips the translucent packaging bag. This is a device for detecting a defective sealing bag when it is low, or a defective sealing bag which is obliquely sealed when the left and right are different, and the configuration thereof is as described above.

  As shown in FIG. 1, a seal checker 1 is disposed in the packaging machine 30. More specifically, as shown in FIG. 8 or FIG. 9, the long body 9 of the seal checker 1 is provided. 8 is installed between the 20th station and the 21st station in which the cooling step (20) and the discharging step (21) of the gas filling table 32B are performed, and from the left side to the right side (upstream side (cooling step (20)) in FIG. A defective seal bag is detected while the packaging body 80 is transported downstream (discharge step (21)).

  In addition, the opening part of the illumination spraying prevention air jet pipe 35 is distribute | arranged inside the illumination part 3 with which the elongate body 9 is provided (left side of the illumination part 3 in FIG. 10), and dirt of the illumination part 3 is carried out by air ejection. Is configured to be prevented. Also, an opening of an air ejection pipe 36 for preventing camera contamination is disposed inside the color camera 2 and the lens 7 provided in the elongated body 9 (on the right side in FIG. 10), and the lens 7 is contaminated by air ejection. Is configured to be prevented.

Next, a method for detecting a defective seal bag in the packaging machine 30 of the present invention will be described.
When the package 80 is conveyed from the left side to the right side (upstream side to downstream side) in FIG. 8, the front sensor (the right end portion in FIG. 8) of the package body 8 is detected by the passage sensor 4, and this detection signal Based on this, the color camera 2 captures an image of the package 80 (S1 in FIG. 3).

  Specifically, as shown in FIG. 4, this image is acquired by the control unit 5 using the color camera 2 along a sealing direction of the package 80 (in the direction of the arrow in FIG. 4) for a predetermined distance ( The distance in the horizontal direction: the distance in the width direction of the package 80: w1) is performed by controlling to sequentially acquire the images a1, a2, a3, a4, a5 of the package 80 (S1 in FIG. 3). .

  In addition, when acquiring the image of the packaging body 80 for every predetermined distance sequentially along the sealing direction of the packaging body 80 with the color camera 2, the control part 5 of this embodiment, as shown in FIG. Control is performed so that the image is not captured until the end and photographing is stopped in the vicinity of the seal portion 81 of the package 80 and the subsequent images are sequentially acquired. Thereby, the image capturing speed of the package 80 can be further increased, and the defective seal bag can be detected more quickly by shortening the image acquisition time.

  Next, as shown in FIG. 6, the control unit 5 converts the image values in the RGB color space of the images b1, b2, b3, b4, and b5 acquired by the color camera 2 into CIEXYZ-color space image values L *, The color image is filtered for inspection by converting it into a *, b * and L *, a *, b * image values (S2 in FIG. 3). This process makes it possible to detect defective seal bags that are not sealed in place, such as L * (brightness) with high or low problems, wrinkles, or slanted seals. , A * (red / green) or b * (yellow / blue) makes it possible to detect a defective sealing bag in which a bite of an object to be packaged is present in the seal portion 81, and to detect them simultaneously. In this embodiment, since the biting target is a cutting node, biting is detected by b * (yellow / blue) corresponding to the color, and a * (red / green) is not used.

  Further, the control unit 5 detects the edge of the package 80, calculates the inspection range (S3 in FIG. 3), and then removes a small defect (packing mark or the like) from the image acquired by the color camera 2. A component removal process (S4 in FIG. 3) is performed. As a result, minute defects are removed from the photographed image, and only the components that are the actual defects are left, so that it is possible to suppress a decrease in processing speed due to a large number of defects, and color and shape variations. Can be smoothed.

  After that, the control unit 5 performs a defect recognition process (S5 in FIG. 3) for combining the defects when there is continuity in the defects of the image acquired by the color camera 2. Thereby, it is possible to detect the biting of the packaged item more reliably by detecting the continuity of the defective portion and combining the defects.

  And the control part 5 synthesize | combines an image into one image, and detects a defective sealing bag, when the inspection width of the package 80 is reached. That is, instead of each acquired image, when the inspection width of the package is reached, the images are combined to comprehensively determine whether or not the bag is a defective seal bag (S6 in FIG. 3). A bag can be detected. It should be noted that detection of a defective sealing bag not sealed at a predetermined position, such as a problem with height, a wrinkle, or a slanted seal, is performed by the inspection position standard L shown in FIG. Judgment is made by comparing with the synthesized image. And the package 80 determined to be a defective seal bag is configured to be discharged out of the machine as a defective seal bag at a discharge station.

DESCRIPTION OF SYMBOLS 1 Seal checker 2 Color camera 3 Illumination part 4 Passing sensor 5 Control part 6 Touch panel 7 Lens 8 Packaging passage 9 Long body 30 Packaging machine 31 Grip pair 32A Packing object filling table 32B Gas filling table 33 Filling machine 34 Seal Device 35 Air blow pipe 36 for preventing illumination dirt Air blow pipe 80 for preventing camera dirt Packaging 81 Sealing part

Claims (11)

  A seal checker for detecting a defective seal bag in a packaging machine, for obtaining an image of the package disposed on one side across a passage of a package in which an article to be packaged is packaged with a translucent packaging bag A color camera, an illumination unit arranged on the other side across the path of the packaging body, a passage sensor for detecting the passage of the packaging body, and an image acquired by the color camera to process the defective seal A seal checker comprising a control unit for detecting a bag.   The seal checker according to claim 1, wherein the control unit controls the color camera to sequentially acquire images of the package at predetermined distances along a seal direction of the package.   The control unit, when acquiring images of the packaging body sequentially at a predetermined distance along the sealing direction of the packaging body with the color camera, stops photographing only at the sealing portion of the packaging body and The seal checker according to claim 2, wherein the seal checker is controlled to acquire an image.   The seal checker according to claim 2 or 3, wherein the control unit detects the defective seal bag by synthesizing the image into a single image when the inspection width of the package is reached.   The control unit converts an image value in an RGB color space of an image acquired by the color camera into an image value L *, a *, b * in CIEXYZ-color space, and the L *, a *, b * image. The seal checker according to claim 1, wherein the defective seal bag is detected based on a value.   The seal checker according to claim 1, wherein the control unit performs a noise component removal process for removing minute defects from an image acquired by the color camera.   The seal checker according to any one of claims 1 to 6, wherein the control unit performs a defect recognition process for combining defects when there is continuity in a defect of an image acquired by the color camera.   The seal checker according to claim 1, wherein the illumination unit is configured by narrow directional illumination.   The seal checker includes a package passage, the color camera arranged on one side of the package passage, an illumination unit arranged on the other side of the package passage, and the passage sensor. The seal checker according to any one of claims 1 to 8, further comprising an elongated body.   The seal checker according to any one of claims 1 to 9, wherein the seal checker has a touch panel, and is configured to be able to input and set a color corresponding to an article to be bitten from the touch panel.   One or a plurality of grip pairs for gripping the translucent packaging bag, a movable body for intermittently moving the grip pairs for each of a plurality of steps, and the grip pair that is intermittently moved by the movable body Filling machine for filling an article to be packaged in the translucent packaging bag, and a sealing device for sealing the vicinity of the bag mouth of the packaging body filled with the article to be packaged in the translucent packaging bag by the filling machine And a seal checker according to any one of claims 1 to 10.

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