JP6686712B2 - Spout inspection device and spout inspection method - Google Patents

Description

  The present disclosure relates to a spout inspection device and a spout inspection method for inspecting a spout inserted in a pouch body.

  A technique has been proposed in which the spout and its surroundings are photographed with the spout inserted in the pouch body, and based on the photographed image, whether or not the opening of the pouch body is turned or broken (see Patent Document 1). In Patent Document 1, the pouch body is illuminated by the backlight, and the spout is illuminated by the top spotlight, and the silhouette of the pouch body is illuminated by the backlight and the spout is illuminated brightly by the top spotlight. And are shooting with a camera.

Japanese Patent No. 4312474

  Conventional pouches with spouts (hereinafter referred to as spouts) often use an opaque sheet material such as aluminum foil or aluminum vapor-deposited film as the material for the pouch. For this reason, even if a pattern is printed on the surface of the spout as in Patent Document 1, when a backlight is applied, a black silhouette can be photographed by the camera regardless of the pattern.

  However, in recent years, from the viewpoint of designability and visualization of contents, an increasing number of spouches have a pattern printed on a transparent or translucent sheet material.

  When a back light is applied to a spouch with a picture printed on a transparent or semi-transparent sheet material and a picture is taken with the camera, the picture is reflected in the taken image. If the above-described inspection is performed based on the photographed image in which the pattern is reflected, there is a possibility that it cannot be correctly inspected for the presence or absence of a defective position of the spout or a curl defect due to the influence of the pattern.

  An embodiment of the present invention provides a spout inspection device and a spout inspection method that can correctly inspect a spout inserted in a pouch body even if a pattern is drawn on the transparent or translucent pouch body.

In order to solve the above problems, according to one aspect of the present disclosure, there is provided a spout inspection device that inspects a spout that seals the opening of a pouch body with the spout inserted in the opening,
The shooting department,
A first illumination unit that illuminates the top surface of the spout with spot illumination light in the axial direction of the spout;
A second illumination unit that illuminates a first region around the connection between the pouch body and the spout with shadowless illumination light;
A first shooting control in which the second lighting unit is turned off and the top surface of the spout is illuminated by the first lighting unit, and the surroundings of the spout are photographed by the photographing unit to generate a first photographed image. Department,
A second photographing control unit that generates a second photographed image by photographing the periphery of the spout by the photographing unit in a state where the first lighting unit is turned off and the periphery of the connection point is illuminated by the second lighting unit. When,
A difference image generation unit that generates a difference image between the first captured image and the second captured image;
A spout inspection device is provided, which includes a spout failure determination unit that determines whether or not there is a mounting failure of the spout based on the difference image.

  The spout mounting failure determined by the spout failure determining unit may include at least one of a pouch body turning-up failure and a spout mounting position failure.

  The difference image generation unit may generate the difference image by apparently offsetting the pattern drawn on the pouch body that is imprinted on the first captured image and the second captured image.

  The second lighting unit may be arranged between the photographing unit and the pouch body.

A third illuminating unit that is disposed on the opposite side of the second illuminating unit with the pouch body interposed therebetween and illuminates a second region around a connection point between the pouch body and the spout,
The first imaging control unit turns off the second illumination unit, illuminates the top surface of the spout with the first illumination unit, and illuminates the second region with the third illumination unit, The surroundings of the spout are photographed by the photographing unit to generate the first photographed image,
The second photographing unit turns off the first illuminating unit and the third illuminating unit and illuminates the first region with the second illuminating unit, and photographs the area around the spout by the photographing unit. The second captured image may be generated.

The first photographing control unit generates the first photographed image for each of the first surface and the second surface of the spouch,
The second photographing control unit generates the second photographed image for each of the first surface and the second surface of the spouch,
The difference image generation unit generates the difference image for each of the first surface and the second surface of the spouch,
The spout failure determination unit determines, for each of the first surface and the second surface of the spout, whether there is a mounting failure of the spout based on the difference image on each surface, and determines whether the spout has the first surface or the second surface. When it is determined that the mounting failure is present on at least one of the two surfaces, the corresponding pouch may be determined to be defective.

  The pouch body may be formed of a transparent or translucent sheet member, and a pattern may be drawn on at least a part of the sheet member.

An inspection range setting unit for setting an inspection range in the difference image,
A binarization unit for converting an image within the inspection range into a binarized image;
An area detection unit that detects one of two areas based on the binary image,
The spout failure determination unit may determine whether or not the pouch body is turned over based on the area detected by the area detection unit.

According to another aspect of the present disclosure, a spout inspection method for inspecting a spout that seals the opening of the pouch body with the spout inserted in the opening,
In the first illumination unit, the top surface of the spout is illuminated with spot illumination light from the axial direction of the spout,
In the second illumination unit, the first area around the connection between the pouch body and the spout is illuminated with shadowless illumination light,
With the second lighting unit turned off and the top surface of the spout illuminated by the first lighting unit, the surroundings of the spout are photographed by a photographing unit to generate a first photographed image,
With the first illumination unit turned off and the second illumination unit illuminating the periphery of the connection point, the image capturing unit captures the periphery of the spout to generate a second captured image,
Generating a difference image between the first captured image and the second captured image,
A spout inspection method for determining whether or not there is a mounting failure of the spout based on the difference image is provided.

  According to the present disclosure, the spout inserted in the pouch body can be correctly inspected.

The block diagram showing the schematic structure of the spout attachment device 2 which incorporates the spout inspection device 1 by one embodiment. (A) is a center pouch, (b) is a figure which shows a corner pouch. (A)-(d) is the figure which showed the processing operation of the spout insertion part typically. FIG. 3A is a plan view of a spouch having a swelling defect, and FIG. 3B is a plan view of a spouch having no swelling defect. The block diagram which shows the 1st example of an internal structure of a spout inspection apparatus. The typical perspective view of the spout inspection device of FIG. (A) is a figure which shows an example of a 1st captured image, (b) is a figure which shows an example of a 2nd captured image, (c) is a figure which shows an example of a difference image. The block diagram which shows the 2nd example of an internal structure of a spout inspection apparatus. The typical perspective view of the spout inspection device 1 of FIG. The top view seen from the axial direction of the spout of FIG. The figure which shows the imaging range by an imaging part. The flowchart which shows an example of the processing operation of the spout inspection apparatus 1 by this embodiment. 13 is a flowchart showing an example of a detailed processing procedure of the inspection of the turning-over defect performed in steps S6 and S7 of FIG. FIG. 13 is a flowchart showing an example of a detailed processing procedure of inspection of a defective attachment position of the spout performed in step S6 of FIG. 12. (A) And (b) is a figure explaining the method of inspecting the attachment position of a spout.

  Hereinafter, embodiments of the present disclosure will be described in detail. FIG. 1 is a block diagram showing a schematic configuration of a spout mounting device 2 incorporating a spout inspection device 1 according to an embodiment of the present invention. The spout attachment device 2 of FIG. 1 includes a pouch supply unit 3, a spout supply unit 4, a spout insertion unit 5, a heat seal unit 6, a cooling unit 7, a non-defective product discharge unit 8, and a defective product discharge unit 9. Is equipped with.

  Each part in the spout attachment device 2 shown in FIG. 1 is arranged, for example, in a circumferential shape, and a carrying part (not shown) for carrying the pouch body in the circumferential direction is provided between the parts.

  A plurality of pouch bodies are stacked on the pouch supply unit 3, and the pouch supply unit 3 supplies the pouch main units one by one to the spout insertion unit 5. A translucent sheet member, for example, is used in the pouch body of the present embodiment, and a pattern is drawn on at least a part of the sheet member. A picture refers to not only an image such as a picture or a photograph, but also arbitrary drawing information such as characters, symbols, numbers, and patterns.

  A plurality of spouts are loaded in the spout supply section 4, and one of the spouts is supplied to the spout insertion section 5.

  The spout insertion portion 5 widens the opening of the pouch body and inserts the spout therein. The pouch body includes a center pouch as shown in FIG. 2 (a) having an opening at the center of the upper surface and a corner pouch as shown in FIG. 2 (b) having an opening at the corner of the upper surface. This embodiment is applicable to manufacturing and inspection of both center pouches and corner pouches.

  The heat seal portion 6 heats the periphery of the opening in the state where the spout is inserted into the opening of the pouch body to seal the opening. The cooling unit 7 cools the heated portion to improve the sealing effect. Through the above manufacturing process, a spouch having the spout inserted in the pouch body is produced.

  The spout inspection device 1 photographs the vicinity of the joint between the pouch body and the spout with respect to the front surface side and the back surface side of the pouch body, and inspects the presence or absence of defective attachment of the spout based on these photographed images. In this specification, one of the front surface and the back surface of the pouch body is referred to as a first surface, and the other is referred to as a second surface. It is assumed that a pattern is drawn on at least one of the first surface and the second surface of the pouch body.

  As will be described later, the spout inspection device 1 according to the present embodiment inspects a turning defect and a mounting position of the spout. As a result of the inspection, the spouch which is determined to have neither the flipping defect nor the mounting position of the spout is conveyed to the non-defective product discharging portion 8 and is determined to have at least one of the turning defect and the mounting position of the spout. Are conveyed to the defective product discharging section 9.

  FIG. 3 is a diagram schematically showing the processing operation of the spout insertion portion 5. As shown in FIG. 3A, the spout insertion portion 5 sucks the pair of suction members 12 on the first surface 11b and the second surface 11c in the vicinity of the opening 11a of the pouch body 11, and then, these suction members. 12 is pulled in the direction opposite to the suction direction to open the opening 11a as shown in FIG. Next, as shown in FIG. 3C, the spout 13 is inserted into the opening 11a.

  When one of the pair of suction members 12 is not firmly sucked to the pouch body 11, the opening area of the opening 11a becomes narrow as shown in FIG. 3D, and the spout 13 is opened in this state. When it is inserted into 11a, the side where the suction member 12 is not firmly sucked is turned over. This is a bad turn. When the flipping failure occurs, the seal between the pouch body 11 and the spout 13 becomes incomplete, which causes the contents stored in the pouch body 11 to leak out.

  FIG. 4A is a plan view of the spouch 14 in which the turning-over failure has occurred, and FIG. 4B is a plan view of the spouch 14 in which the turning-over failure has not occurred. When the turning-over failure occurs, the spout 13 is exposed excessively as shown in FIG. 4A. Therefore, it is possible to inspect the appearance of the pouch body 11 for the turning-over failure. Therefore, in the present embodiment, as will be described later, the first surface 11b side and the second surface 11c side of the pouch body 11 are photographed, respectively, and the exposed area of the spout 13 is used to inspect whether or not there is a turn-up defect.

  5 is a block diagram showing a first example of the internal configuration of the spout inspection device 1, and FIG. 6 is a schematic perspective view of the spout inspection device 1 of FIG. The spout inspection device 1 shown in FIGS. 5 and 6 includes a photographing unit 21, a first lighting unit 22, a second lighting unit 23, a first photographing control unit 24, a second photographing control unit 25, and a difference image. It has a generation unit 26 and a spout failure determination unit 27.

  The image capturing unit 21 captures an image around the connection portion between the pouch body 11 and the spout 13 of the spouch 14. As shown in FIG. 6, the first illumination unit 22 illuminates the top surface of the spout 13 with spot illumination light from the axial direction of the spout 13. The first illuminator 22 illuminates the top surface of the spout 13, and a part of the illumination light is also applied to the pouch body 11. Therefore, when the pouch body 11 is translucent, the design of the pouch body 11 is exposed by receiving the illumination light.

  The second illumination unit 23 illuminates the first area 32 around the connection between the pouch body 11 and the spout 13 with shadowless illumination light. The second illumination section 23 has a plurality of light source sections arranged in a ring shape or a dope shape, and photographs the periphery of the connection portion between the pouch body 11 and the spout 13 so that shadows cannot be formed. As shown in FIG. 6, the second lighting unit 23 is arranged, for example, on the first surface 11b side of the pouch body 11 together with the photographing unit 21. More specifically, the second lighting unit 23 is arranged between the photographing unit 21 and the first surface 11b of the pouch body 11. When the second illuminator 23 has a ring shape, by arranging the photographing unit 21 in a direction normal to the first surface 11b of the pouch body 11 and in a direction passing through the hole at the center of the ring, the first photographing is performed. It is possible to prevent the second illumination unit 23 from being reflected in the image and the second captured image. When the second illumination unit 23 has a dome shape, by arranging the second illumination unit 23 at a position deviated from the optical axis direction of the image capturing unit 21, the second captured image and the second captured image are also secondarily arranged. It is possible to prevent the illumination unit 23 from being reflected.

  The size of the first region 32, which is the illumination range of the second illumination unit 23, is arbitrary, but it is necessary to have a size that includes a range in which it is possible to inspect the pouch body 11 for turning over defects and the spout 13 for connection position defects. More specifically, the first region 32 has a size including the spout 13 exposed from the pouch body 11 and the vicinity of the connection portion between the pouch body 11 and the spout 13. Similarly, the shooting range of the first shot image and the second shot image is a range including the spout 13 exposed from the pouch body 11 and the vicinity of the connection portion between the pouch body 11 and the spout 13.

  The first shooting control unit 24 turns off the second lighting unit 23, illuminates the top surface of the spout 13 with the first lighting unit 22, and then shoots the surroundings of the spout 13 with the shooting unit 21 to perform the first shooting. Generate a captured image. The second photographing control unit 25 turns off the first illumination unit 22 and illuminates the periphery of the connection point with the second illumination unit 23, and photographs the surroundings of the spout 13 with the photographing unit 21 to obtain a second photographed image. Is generated and output.

  The difference image generation unit 26 generates a difference image between the first captured image and the second captured image. The spout defect determination unit 27 determines whether or not the attachment position of the spout 13 is defective based on the difference image.

  The processes of the first shooting control unit 24, the second shooting control unit 25, and the difference image generation unit 26 described above are performed on the first surface 11b side and the second surface 11c side of the spouch 14, respectively. That is, each of the first surface 11b side and the second surface 11c side of the spouch 14 is photographed, and the difference image on the first surface 11b side and the difference image on the second surface 11c side of the spouch 14 are output. The spout defect determination unit 27 determines whether or not there is a defect in the mounting position of the spout 13 based on the difference image on the first surface 11b side and the difference image on the second surface 11c side of the spout 14.

  FIG. 7A is a diagram showing an example of the first captured image generated by the first capturing control unit 24. As described above, the first lighting unit 22 illuminates the top surface of the spout 13, but part of the illumination light also illuminates the pouch body 11, so the first captured image includes the image of the spout 13 and the pattern 11d. Is reflected.

  FIG. 7B is a diagram showing an example of the second photographed image generated by the second photographing control unit 25. Since the second illumination unit 23 illuminates the periphery of the connection between the pouch body 11 and the spout 13 so that no shadow can be cast, the image of the spout 13 and the pattern 11d is reflected in the second captured image.

  The difference image generation unit 26 generates a difference image between the first captured image shown in FIG. 7A and the second captured image shown in FIG. 7B. Since the pattern 11d is reflected in both the first captured image and the second captured image, the brightness of at least one of the first captured image and the second captured image is adjusted, and then the difference between the two images is obtained. By doing so, the patterns 11d included in both images can be offset, and a difference image that does not include the image of the patterns 11d can be generated as shown in FIG. 7C. As a result, the difference image includes only the image in the vicinity of the connection between the pouch body 11 and the spout 13, and the opening 11a of the pouch body 11 is not turned up and the spout 13 inserted in the pouch body 11 is attached. It becomes easy to detect defective position and mounting angle.

  As will be described later, the spout defect determination unit 27 sets the inspection area 11e in the difference image as shown in FIG. 7C, and based on the image in the inspection area 11e, the pouch body 11 has a defect of turning over and a spout. Inspect 13 for defective mounting position.

  The photographing unit 21 can obtain a photographed image of only one of the first surface 11b side and the second surface 11c side of the pouch body 11 in one photographing. Therefore, the first captured image and the second captured image are generated for each of the first surface 11b side and the second surface 11c side of the pouch body 11, and the difference image on the first surface 11b side and the second surface 11c side are generated. It is necessary to generate the difference image of

  If the spout defect determination unit 27 detects a defect at the connection point between the pouch body 11 and the spout 13 on at least one of the first surface 11b side and the second surface 11c side of the pouch body 11, the spout 14 is not detected. Judge as good product. Further, if no defect is detected in the connection portion between the pouch body 11 and the spout 13 on both the first surface 11b side and the second surface 11c side of the pouch body 11, the spouch 14 is determined as a good product.

  Although the example in which the defect determination of the spout 13 is performed using the first illumination unit 22 and the second illumination unit 23 has been described with reference to FIG. 5, a third illumination unit 31 may be further provided as illustrated in FIG. 8. 8 is a block diagram showing a second example of the internal configuration of the spout inspection device 1, FIG. 9 is a schematic perspective view of the spout inspection device 1 of FIG. 8, and FIG. 10 is seen from the axial direction of the spout 13 of FIG. FIG. 11 is a plan view, and FIG. 11 is a diagram showing a shooting range by the shooting unit 21. The spout inspection device 1 of FIG. 8 has a third illumination unit 31 in addition to the configuration of FIG.

  As shown in FIG. 9, the third lighting unit 31 is arranged on the opposite side of the second lighting unit 23 with the pouch body 11 interposed therebetween. For example, when the first lighting unit 22 and the photographing unit 21 are arranged on the first surface 11b side of the pouch body 11, the third lighting unit 31 is arranged on the second surface 11c side of the pouch body 11. The third lighting unit 31 captures an image of the area around the connection between the pouch body 11 and the spout 13. The area of the second region 33, which is the illumination range of the third illumination section 31, does not necessarily have to match the area of the illumination range of the first illumination section 22.

  The third illuminator 31 is illuminated at the same timing as the first illuminator 22. That is, the first imaging control unit 24 turns off the second illumination unit 23, illuminates the top surface of the spout 13 with the first illumination unit 22, and illuminates the second region 33 with the third illumination unit 31. Then, the periphery of the spout 13 is photographed by the photographing unit 21 and the first photographed image is output. The second shooting control unit 25 turns off the first lighting unit 22 and the third lighting unit 31 and lights the first region 32 with the second lighting unit 23, and the shooting unit 21 shoots the surroundings of the spout 13. Then, the second captured image is output.

  As shown in FIG. 11, the second region 33 that is the illumination range of the third illumination unit 31 is, for example, a rectangular shape, and the first region 32 that is the illumination range of the second illumination unit 23 is, for example, a circle. In FIG. 11, the illumination range of the second illumination section 23 includes the illumination range 33 of the third illumination section 31, but this is only an example. The illumination range of the first to third illumination units 22, 23, 33 is arbitrary.

  When the pouch body 11 is translucent and the pattern 11d is drawn on at least one of the first surface 11b and the second surface 11c of the pouch body 11, the image of the pattern 11d is illuminated by the illumination of the third lighting unit 31. Is imprinted on the first captured image. The second captured image is similar to the image shown in FIG. Therefore, when the difference image generation unit 26 calculates the difference between the first captured image and the second captured image, it is possible to generate a difference image in which the pattern 11d drawn on the pouch body 11 is offset. Therefore, the spout defect determination unit 27 can correctly detect the presence or absence of a defect in the spout 13 without being influenced by the pattern 11d.

  FIG. 12 is a flowchart showing an example of the processing operation of the spout inspection device 1 according to this embodiment. First, the pouch body 11 is supplied to the spout insertion part 5 one by one from the pouch supply part 3 (step S1), and the spouts 13 are supplied one by one from the spout 13 supply part 4 to the spout insertion part 5 (step S2). . In the spout insertion portion 5, the opening 11a of the pouch body 11 is opened, and the spout 13 is inserted through the opening 11a (step S3). Next, the heat seal part 6 applies heat to the vicinity of the opening 11a of the pouch body 11 to perform heat seal (step S4). Subsequently, the cooling unit 7 cools the heat-sealed portion to improve the sealing effect (step S5). Through the above steps, the spouch 14 in which the spout 13 is inserted into the pouch body 11 is manufactured.

  Next, the spout inspection device 1 takes an image of the first surface 11b side of the pouch body 11 according to the first example of FIG. 5 or the second example of FIG. 8 to determine that the pouch body 11 on the first surface 11b side is not turned up. The spout 13 is inspected for a position defect (step S6).

  Next, the spout inspection device 1 flips over the pouch body 11, photographs the second surface 11c side in accordance with the first example of FIG. 5 or the second example of FIG. 8, and then removes the pouch body 11 on the second surface 11c side. The presence / absence of a turning-over defect is inspected (step S7).

  Next, the spout failure determination unit 27 in the spout inspection device 1 determines the quality of the produced spouch 14 based on the inspection results of steps S6 and S7 (step S8). As a result, if neither of the steps S6 and S7 is determined to be defective, the manufactured pouch 14 is conveyed to the non-defective product discharging portion 8 (step S9). When it is determined to be defective in at least one of steps S6 and S7, the produced pouch 14 is conveyed to the defective product discharge portion 9 (step S10).

  FIG. 13 is a flowchart showing an example of a detailed processing procedure of the inspection of the turning-over defect performed in steps S6 and S7 of FIG. First, the first shooting controller 24 lights the top surface of the spout 13 inserted into the pouch body 11 by the first lighting unit 22 with the second lighting unit 23 turned off, and the shooting unit 21. At, the vicinity of the connection between the pouch body 11 and the spout 13 is photographed to generate a first photographed image (step S11). When the spout inspection apparatus 1 has the third illumination unit 31 as shown in FIG. 5, the first imaging control unit 24 illuminates the top surface of the spout 13 with the first illumination unit 22 and also the third illumination unit 31. In the state where the vicinity of the connection between the pouch body 11 and the spout 13 is illuminated from the second surface 11c side of the pouch body 11, the photographing unit 21 performs photographing and outputs the first photographed image.

  Next, the 2nd photography control part 25 is in the state which made the 1st illumination part 22 light-extinguish (when the 3rd illumination part 31 exists, also makes the 3rd illumination part 31 light-extinguish), and the 2nd illumination part 23. In the state where the vicinity of the connection between the pouch body 11 and the spout 13 is illuminated, the vicinity of the connection is photographed by the photographing unit 21 to generate a second photographed image (step S12).

  Next, the difference image generation unit 26 performs image processing for obtaining a difference between the first captured image and the second captured image to cancel the image of the pattern 11d reflected in the first captured image and the second captured image. The difference image is generated (step S13).

  Next, the spout failure determination unit 27 sets the inspection area 11e in the difference image (step S14, inspection range setting unit). The inspection area 11e is set in the vicinity of the connection point between the pouch body 11 and the spout 13, which is a range in which the turning-over failure occurs. The inspection area 11e is, for example, a difference image within a broken line frame in FIG.

  Next, the spout failure determination unit 27 binarizes the image data in the inspection area 11e in the difference image (step S15, binarization unit). Since the spout 13 and the pouch body 11 have different brightness from each other, the spout 13 and the pouch body 11 can be distinguished by 0 and 1 by binarizing.

  Next, the spout failure determination unit 27 compares the areas of the spout 13 and the pouch body 11 on the basis of the binarized image data, and determines the turning over failure (step S16, area detection unit). More specifically, if the area ratio of the spout 13 is larger than a predetermined threshold value, it is determined that the turning-over failure has occurred. The process of FIG. 13 is performed for each of the first surface 11b side and the second surface 11c side of the pouch body 11.

  FIG. 14 is a flowchart showing an example of a detailed processing procedure of the inspection of the attachment position of the spout 13 performed in step S6 of FIG. This flowchart shows an example of the inspection procedure of the center pouch in which the spout 13 is inserted in the center of the pouch body 11.

  First, in a state where illumination is performed by at least one of the first illumination unit 22 and the third illumination unit 31, the imaging unit 21 captures an image of the vicinity of the connection between the pouch body 11 and the spout 13 (step S21). As shown in FIG. 15A, the position of the head of the spout 13 is detected based on the captured image of step S21 (step S22), and the position of the end of the spout 13 is detected (step S23).

  Next, based on the detection results of steps S22 and S23, as shown in FIG. 15A, the distance d1 from the head to the end of the spout 13 is detected (step S24). Next, it is determined whether or not the distance d1 detected in step S24 is a value within a range assumed in advance (step S25).

  Next, as shown in FIG. 15B, the center position of the spout 13 is detected based on the captured image of step S21 (step S26). Next, as shown in FIG. 15B, the center position of the pouch body 11 is detected (step S27). Next, the distance d2 between the center positions detected in steps S26 and S27 is detected (step S28). Next, it is determined whether or not the distance d2 detected in step S28 is a value within a range assumed in advance (step S29).

  When NO is determined in at least one of the determination in step S25 and step S29, it is determined that the mounting position of the spout 13 is defective (step S30), and when both are determined to be YES, It is determined that the mounting position of the spout 13 is not defective (step S31).

  As described above, in the present embodiment, after the spout 13 is inserted and sealed in the opening 11a of the pouch body 11, the spot illumination light is applied to the top surface direction of the spout 13 by the first illumination unit 22, A first photographed image of the area around the connection between the pouch body 11 and the spout 13 and a connection area around the connection between the pouch body 11 and the spout 13 in the second illumination unit 23 in the state where shadowless illumination light is applied to the connection area. A difference image from the second captured image obtained by capturing the periphery is generated. Thereby, even if the pouch body 11 is a transparent or semi-transparent sheet member and the pattern 11d is drawn on the sheet surface, a difference image in which the pattern 11d is offset can be obtained. Therefore, it is possible to correctly inspect whether the pouch body 11 is turned over or the spout 13 is attached at a wrong position by the difference image without being influenced by the design 11d.

  The aspects of the present invention are not limited to the individual embodiments described above, but include various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the above-described contents. That is, various additions, changes and partial deletions can be made without departing from the conceptual idea and spirit of the present invention derived from the contents defined in the claims and the equivalents thereof.

  1 spout inspection device, 2 spout mounting device, 3 pouch supply part, 4 spout supply part, 5 spout insertion part, 6 heat seal part, 7 cooling part, 8 good product discharge part, 9 defective product discharge part, 11 pouch body, 11a 1st surface, 11b 2nd surface, 12 adsorption member, 13 spout, 14 spout, 21 photography part, 22 1st illumination part, 23 2nd illumination part, 24 1st photography control part, 25 2nd photography control part, 26 Difference image generation unit, 27 spout defect determination unit,

Claims (9)

A spout inspection device for inspecting a spout that seals the opening in a state where the spout is inserted into the opening of the pouch body,
The shooting department,
A first illumination unit that illuminates the top surface of the spout with spot illumination light in the axial direction of the spout;
A second illumination unit that illuminates a first region around the connection between the pouch body and the spout with shadowless illumination light;
A first shooting control in which the second lighting unit is turned off and the top surface of the spout is illuminated by the first lighting unit, and the surroundings of the spout are photographed by the photographing unit to generate a first photographed image. Department,
A second photographing control unit that generates a second photographed image by photographing the periphery of the spout by the photographing unit in a state where the first lighting unit is turned off and the periphery of the connection point is illuminated by the second lighting unit. When,
A difference image generation unit that generates a difference image between the first captured image and the second captured image;
A spout inspection device, comprising: a spout failure determination unit that determines whether or not there is a mounting failure of the spout based on the difference image.   The spout inspection device according to claim 1, wherein the spout attachment defect determined by the spout defect determination unit includes at least one of a pouch body flip-up defect and a spout attachment position defect.   The difference image generation unit generates the difference image by apparently offsetting a pattern drawn on the pouch body that is imprinted on the first captured image and the second captured image. Spout inspection device.   The spout inspection device according to claim 1, wherein the second illumination unit is arranged between the imaging unit and the pouch body. A third illuminating unit that is arranged on the opposite side of the second illuminating unit with the pouch body interposed therebetween and that illuminates a second region around a connection point between the pouch body and the spout,
The first imaging control unit turns off the second illumination unit, illuminates the top surface of the spout with the first illumination unit, and illuminates the second region with the third illumination unit, The surroundings of the spout are photographed by the photographing unit to generate the first photographed image,
The second photographing unit turns off the first illuminating unit and the third illuminating unit and illuminates the first region with the second illuminating unit, and photographs the area around the spout by the photographing unit. The spout inspection device according to any one of claims 1 to 4, which generates the second captured image. The first photographing control unit generates the first photographed image for each of the first surface and the second surface of the spouch,
The second photographing control unit generates the second photographed image for each of the first surface and the second surface of the spouch,
The difference image generation unit generates the difference image for each of the first surface and the second surface of the spouch,
The spout failure determination unit determines, for each of the first surface and the second surface of the spout, whether there is a mounting failure of the spout based on the difference image on each surface, and determines whether the spout has the first surface or the second surface. The spout inspection device according to claim 1, wherein when it is determined that the mounting failure is present on at least one of the two surfaces, the corresponding spouch is determined to be defective.   The spout inspection device according to claim 1, wherein the pouch body is formed of a transparent or translucent sheet member, and a pattern is drawn on at least a part of the sheet member. An inspection range setting unit for setting an inspection range in the difference image,
A binarization unit for converting an image within the inspection range into a binarized image;
An area detection unit that detects one of two areas based on the binary image,
The spout inspection device according to any one of claims 1 to 7, wherein the spout failure determination unit determines whether or not the pouch body is turned over, based on the area detected by the area detection unit. . A spout inspection method for inspecting a spout that seals the opening in a state where the spout is inserted into the opening of the pouch body,
In the first illumination unit, the top surface of the spout is illuminated with spot illumination light from the axial direction of the spout,
In the second illumination unit, the first area around the connection between the pouch body and the spout is illuminated with shadowless illumination light,
With the second lighting unit turned off and the top surface of the spout illuminated by the first lighting unit, the surroundings of the spout are photographed by a photographing unit to generate a first photographed image,
With the first illumination unit turned off and the second illumination unit illuminating the periphery of the connection point, the image capturing unit captures the periphery of the spout to generate a second captured image,
Generating a difference image between the first captured image and the second captured image,
A spout inspection method for determining whether or not there is a mounting failure of the spout based on the difference image.