Inspection device for food packaging roll body

Abstract

To provide an inspection device for food packaging roll body capable of automatically and highly accurately inspecting protrusion from food sheet side parts on both ends of a core and preventing difficulties in mass production of food packaging roll bodies.SOLUTION: An inspection device for food packaging roll body includes: a pair of imaging sensors 20 that images both ends of a food packaging roll body 1 conveyed while being sandwiched by a hanger conveyor 11; and inspection determination means that inspects the quality of the food packaging roll body 1 using multiple images captured by the pair of imaging sensors 20. The inspection determination means implements: a function for measuring an area value of a paper tube end 3 protruding from a wrap film 4 of the image of the food packaging roll body 1 captured by the imaging sensor 20; a function for comparing the area value with a predetermined upper and lower threshold range; a function for determining the food packaging roll body 1 as a non-defective product with no winding deviation when the area value falls within the predetermined upper and lower threshold range; and a function for determining the food packaging roll body 1 as a defective product with winding deviation when the area value falls outside the predetermined upper and lower threshold range.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an inspection device for a food packaging roll that inspects for misalignment of a food packaging roll having a food sheet wound around a core. [Background technology]

[0002] Conventionally, when manufacturing and shipping a food packaging roll body 1 used for preserving food or dishes, as partially shown in Figure 6, first a long transparent strip-shaped wrap film 4 is rewound in multiple layers around a paper tube 2 which serves as a winding core to manufacture the food packaging roll body 1, and the overall appearance of this manufactured food packaging roll body 1 is imaged by an overall imaging sensor. The rewound wrap film 4 is inspected for the presence or absence of wrinkles, etc., to determine whether the food packaging roll body 1 is good or bad. Thereafter, the food packaging roll body 1 which has been determined to be good is packed into an open presentation box and sealed, thereby shipping the food packaging roll body 1 (see Patent Documents 1 and 2).

[0003] The shipped food packaging roll 1 is stored in a decorative box and the wrap film 4 is pulled out and used, but it is important that both ends 3 (also called protruding margins) of the paper tube 2 protrude by an appropriate length from both side ends 5 of the wrap film 4, which has been rewound in multiple layers (see the oval portion in Figure 6).

[0004] This is because both ends 3 of the cardboard tube 2 do not protrude an appropriate length from both side portions 5 of the wrap film 4 that has been rewound in multiple layers, and as the wrap film 4 shifts in winding, one end 3 of the cardboard tube 2 protrudes an excessive length from one side portion 5 of the wrap film 4, and the other end 3 of the cardboard tube 2 hardly protrudes from the other side portion 5 of the wrap film 4 and is surrounded by the wrap film 4 (see the oval portion in Figure 7), causing the other side portion 5 of the wrap film 4 to slide against the inner side of the cosmetic box, and this sliding contact creates resistance and makes it difficult to pull out the wrap film 4.

[0005] Therefore, when inspecting the food packaging roll body 1, it is necessary not only to check whether there are any wrinkles in the wrap film 4, but also to check whether both ends 3 of the cardboard tube 2 properly protrude from both side ends 5 of the wrap film 4 that has been rewound in multiple layers. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2021-162389 A [Patent Document 2] JP 2021-147135 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, since the length, width, and overall thickness of the wrap film 4 of the food packaging roll body 1 vary depending on whether it is for home or commercial use, rough imaging using an overall imaging sensor that targets the overall appearance may not be sufficient to adequately capture the imaging angle, etc., and it may not be possible to completely inspect whether both ends 3 of the paper tube 2 are properly protruding.

[0008] To solve this problem, there are two methods: (1) to raise the inspection standard level, and (2) to visually inspect both ends of all food packaging roll bodies 1. However, if method (1) is adopted, a large number of food packaging roll bodies 1 will be judged to be defective because both ends 3 of the paper tube 2 do not protrude by an appropriate length, which is a major problem that makes it difficult to mass-produce food packaging roll bodies 1. Furthermore, if method (2) is adopted, there is a risk of inspection errors due to fatigue, etc., when the food packaging roll bodies 1 are mass-produced, and moreover, labor costs will increase, leading to increased manufacturing costs.

[0009] The present invention has been made in consideration of the above, and aims to provide an inspection device for food packaging roll bodies that can automatically and accurately inspect the protrusion of both ends of the roll core from the side of the food sheet, and that can prevent difficulties in mass-producing food packaging roll bodies. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention provides an apparatus for inspecting a food packaging roll body having a strip-shaped food sheet wound around a core, the apparatus comprising: The food packaging roll body is transported by a conveyor. ... The plurality of imaging means are installed on both sides of a hanger conveyor that sandwiches the food packaging roll body and transports it obliquely upward, The inspection and judgment means is characterized by having the functions of measuring characteristic values ​​of the core end portion protruding from the food sheet in the image of the food packaging roll body captured by the imaging means, comparing the measured characteristic value with predetermined upper and lower threshold ranges, and judging the quality of the food packaging roll body based on the results of the comparison.

[0011] The core of the food packaging roll body may be a paper tube, and the food sheet may be a light-transmitting resin film. The system may also include an overall imaging means that is installed downstream of the multiple imaging means and images the entire food packaging roll body, and a cartoning mechanism that is installed downstream of the overall imaging means and packs the food packaging roll body into an open decorative box and seals it.

[0012] In addition, it is preferable that the imaging means images the center of the food packaging roll body transported to the intended imaging location on the hanger conveyor so that the core end face of the food packaging roll body and the side of the food sheet are approximately parallel to each other within an angle range of -5° to +5° from above.

[0013] In addition, the inspection and judgment means preferably has the functions of measuring a characteristic value of the core end protruding from the food sheet in the image of the food packaging roll body captured by the imaging means, comparing the measured characteristic value with a predetermined upper and lower threshold range, and judging the food packaging roll body to be a good product with no winding misalignment if the characteristic value is within the predetermined upper and lower threshold range as a result of the comparison, and judging the food packaging roll body to be a defective product with winding misalignment if the characteristic value is outside the predetermined upper and lower threshold range as a result of the comparison.

[0014] In addition, the inspection and judgment means preferably has the functions of measuring the area of ​​the core end protruding from the food sheet in the image of the food packaging roll body captured by the imaging means, comparing this measured area value with predetermined upper and lower threshold ranges, and judging the food packaging roll body to be a good product with no winding misalignment if the comparison result shows that the area value is within the predetermined upper and lower threshold ranges, and judging the food packaging roll body to be a defective product with winding misalignment if the comparison result shows that the area value is outside the predetermined upper and lower threshold ranges.

[0015] In addition, the inspection and judgment means preferably has the functions of: applying color to the core end protruding from the food sheet in the image of the food packaging roll body captured by the imaging means and highlighting it on the screen; measuring the area of ​​the core end highlighted on the screen; comparing the measured area value with predetermined upper and lower threshold ranges; and, if the comparison shows that the area value is within the predetermined upper and lower threshold ranges, judging the food packaging roll body to be a good product with no winding misalignment; and, if the comparison shows that the area value is outside the predetermined upper and lower threshold ranges, judging the food packaging roll body to be a defective product with winding misalignment.

[0016] Here, the core in the claims includes at least a paper tube and a resin core. The food sheet includes at least a transparent or semi-transparent resin sheet or film having optical transparency, silver aluminum foil, cooking sheet, etc. The core end of the image of the food packaging roll body captured by the imaging means may be displayed as a color image or a black and white image. The characteristic value of the core end includes at least the area of ​​the core end, etc.

[0017] The up, down, front, back, left and right directions of the food packaging roll inspection device according to the present invention are directions based on the drawings and can be appropriately changed as necessary. Furthermore, although the subject of the present invention is an inspection device for food packaging rolls, if the configuration of another application is the same as the configuration of the present invention and can be converted to an inspection device for food packaging rolls, and the effect of the present invention is achieved, the configuration of the other application falls within the technical scope of the present invention.

[0018] According to the present invention, both ends of the food packaging roll are automatically imaged and inspected by multiple dedicated imaging means, so it is possible to effectively inspect whether both ends of the core properly protrude from the sides of the food sheet. Also, since multiple imaging means are installed on the hanger conveyor that transports the food packaging roll while holding it in a clamped state, the position of the ends of the food packaging roll can be stabilized. Effect of the Invention

[0019] According to the present invention, it is possible to automatically and highly accurately inspect the protrusion of both ends of the roll core from the sides of the food sheet, and it is also possible to prevent difficulties in mass-producing food packaging roll bodies.

[0020] According to the invention described in claim 2, the whole food packaging roll inspected by the imaging means and the inspection and judgment means, including the end portion, is further inspected by the whole-body imaging means downstream, so that the risk of overlooking an inspection can be eliminated. Also, non-missing food packaging rolls can be packed in a presentation box and shipped.

[0021] According to the invention described in claim 3, the imaging means images the center of the food packaging roll body transported to the intended imaging location on the hanger conveyor under conditions where the core end face of the food packaging roll body and the side of the food sheet are approximately parallel within an angle range of -5° to +5° from above, so that the characteristic values ​​of the core end face can be measured with high accuracy.

[0022] According to the invention described in claim 4, the area is selected as the characteristic value of the core end and this area is measured, which makes it possible to eliminate the risk of the side of the food sheet being located near the end of the core and interfering with high-precision measurement. In addition, since the diameter of the core around which the food sheet is wound is generally constant, it is expected that the area of ​​the core end can be measured smoothly.

[0023] According to the invention described in claim 5, the inspection and judgment means displays on a screen an image of the food packaging roll body captured by the imaging means, and also highlights the core ends protruding from the food sheet in the image displayed on the screen by applying color, which is expected to make it easier to detect the core ends. [Brief description of the drawings]

[0024] [Figure 1] 1 is a plan view illustrating a cartoner device in an embodiment of a food packaging roll inspection device according to the present invention; FIG. [Diagram 2] 1 is a side view illustrating a schematic diagram of a cartoner device in an embodiment of a food packaging roll inspection device according to the present invention. FIG. [Diagram 3] FIG. 2 is a plan view illustrating a hanger conveyor of a cartoner device in an embodiment of a food packaging roll inspection device according to the present invention. [Figure 4] 1 is a main part explanatory diagram showing a schematic diagram of a relationship between a food packaging roll and an image sensor in an embodiment of a food packaging roll inspection device according to the present invention. FIG. [Diagram 5] FIG. 2 is a front view illustrating a display screen of the food packaging roll inspection device according to the embodiment of the present invention. [Figure 6] 1 is an explanatory diagram showing the normal state in which the end of the paper tube properly protrudes from the side of the wrap film. FIG. [Figure 7] FIG. 11 is an explanatory diagram showing an abnormal state in which the end of the paper tube hardly protrudes from the side of the wrap film. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] A preferred embodiment of the present invention will now be described with reference to the drawings. The food packaging roll inspection device in this embodiment, as shown in Figures 1 to 7, is part of a cartoner device that inspects and boxes a food packaging roll 1 having a wrap film 4 wound around a paper tube 2, and is equipped with a pair of image sensors 20 that capture images of both ends of the food packaging roll 1 transported by a hanger conveyor 11, and an inspection and judgment means 30 that inspects the quality of the food packaging roll 1 using multiple images captured by the pair of image sensors 20, thereby contributing to the achievement of Goal 9 of the SDGs adopted at the United Nations Summit.

[0026] As shown in Figures 3 to 7, food packaging roll 1 is formed by rewinding and winding a long, colorless, transparent, strip-shaped food wrap film 4 in multiple layers around a cylindrical paper tube 2, with a rectangular opening paper for use in pulling out the film being affixed between the outermost wrap film 4 and the wrap film 4 on the inside, and is transported from a designated rewinder for rewinding to a hanger conveyor 11 by a roller conveyor 10 of a cartoner device.

[0027] Depending on the region in which this food packaging roll body 1 is used, in a good product, both end portions 3 of the paper tube 2 protrude from both side portions 5 of the wrap film 4, which is wound in multiple layers, by a length of 1 mm to 3 mm, whereas in a defective product with misaligned winding, the end portion 3 of the paper tube 2 will be exposed for a small length of less than 1 mm and surrounded by the wrap film 4, or will protrude by an excessive length of more than 3 mm.

[0028] The cardboard tube 2 is formed into a long and thin cylindrical shape with excellent dust resistance and surface smoothness, for example, by spirally winding recycled paper, and the outer circumferential surface is colored white. The diameter of the cardboard tube 2 is generally always constant regardless of the type or use of the food packaging roll body 1. In addition, when the food packaging roll body 1 is for commercial use, the wrap film 4 is formed into a flexible thin film with a thickness of 6 μm to 12 μm using polyvinyl chloride (PVC) or the like, which has excellent adhesion and extensibility, and is wound around the cardboard tube 2 in a predetermined size. The size of the wrap film 4 is, for example, 20 m, 50 m, or 100 m in length and 150 mm, 220 mm, 300 mm, or 450 mm in width.

[0029] 1 to 4, the hanger conveyor 11 has an upper portion 12 formed with a substantially rectangular opening in plan view to enable visual inspection of the food packaging roll 1, and is installed between the upstream roller conveyor 10 and the downstream cartoner mechanism 15 to inspect the quality of both ends of the food packaging roll 1. This hanger conveyor 11 clamps and suspends the paper tube 2 of the food packaging roll 1 transported from the roller conveyor 10 between hangers, leaving all but both ends of the food packaging roll 1 in a suspended state, and transports the food packaging roll 1 in this suspended state from the roller conveyor 10 to the cartoner mechanism 15 located diagonally above by the circulation of an endless drive chain.

[0030] As shown in Figures 3 and 4, a pair of left and right bars 13 are attached above the hangers and can be seen from the open top 12 of the hanger conveyor 11. The pair of left and right bars 13 are installed parallel to each other at a specified distance on both sides inside the hanger conveyor 11 as mounting members, and are oriented in the conveying direction of the food packaging roll 1 located below, with each bar 13 having a cross section that is generally I-shaped, generally L-shaped, generally groove-shaped, etc.

[0031] 1 and 2, disposed downstream of the hanger conveyor 11 are a required number of overall imaging sensors 14 for imaging the overall appearance of the food packaging roll 1 from above to inspect the quality of the food packaging roll 1, and a cartoner mechanism 15 for packing food packaging rolls 1 that have been determined to be good into open presentation boxes and sealing them. The overall imaging sensor 14 is, for example, a monochrome CMOS, and functions to finally inspect the presence or absence of wrinkles in the rewound wrap film 4, the protruding length of both ends 3 of the paper tube, the presence or absence of deformation of the ends 3 of the paper tube, etc. An example of a product for this overall imaging sensor 14 is the CV-X series image sensor (product name: manufactured by Keyence Corporation).

[0032] As shown in Figures 1 and 2, the cartoner mechanism 15 functions to sequentially lift up multiple folded cosmetic boxes to shape them into a box, open the side of the shaped cosmetic box, insert the food packaging roll body 1 that has ultimately been determined to be a good product into the open side of the cosmetic box using a pusher, and then fold and seal the flap piece on the open side of the cosmetic box.

[0033] 3 and 4, a pair of imaging sensors 20 are installed facing downward via fasteners near the center of a pair of bars 13 on both sides inside the hanger conveyor 11, and capture images of both ends of the food packaging roll 1 transported by the hanger conveyor 11 to the cartoner mechanism 15 from above, and output the image data sequentially to the inspection and determination means 30. When the food packaging roll 1 is transported to the intended imaging location on the hanger conveyor 11, the pair of imaging sensors 20 capture an image of at least one end 3 of the paper tube 2 from above.

[0034] Each imaging sensor 20 is made of, for example, a small CMOS with a fast signal transmission speed, and captures images so that the end face of the paper tube 2 of the food packaging roll 1 transported to the intended imaging location is approximately parallel to the side 5 of the wrap film 4, from the viewpoint of facilitating calculations related to the inspection of the food packaging roll 1. Specifically, images are captured using LED illumination so that the end face of the paper tube 2 of the food packaging roll 1 and the side 5 of the wrap film 4 are approximately parallel to the center of the food packaging roll 1 transported to the intended imaging location within an angle range of -5° to +5° from above, preferably -2° to 2°, and more preferably around 0°.

[0035] In order to obtain clear images, each imaging sensor 20 captures images with LED illumination at a close distance of 100 mm or less, preferably 60 mm to 100 mm, and more preferably 70 mm to 100 mm, from the surface of the wrap film 4, the outermost layer of the food packaging roll 1, transported to the intended imaging location. An example of such an imaging sensor 20 is the AI-equipped image discrimination sensor IV-3 series (product name, manufactured by Keyence Corporation).

[0036] 2, the inspection and judgment means 30 is, for example, a commercially available computer device with a display 31, is connected to the controller of the cartoner device, and is installed on the frame of the cartoner device or in its vicinity. This inspection and judgment means 30 has dedicated software for measurement and control applications installed, and the CPU uses the RAM as a working area to read specific programs of the dedicated software stored on a hard disk or the like, thereby realizing the specified functions as a computer.

[0037] Specifically, the system realizes the following functions: applying a chromatic color C to the core end 3 protruding from the wrap film 4 in the image of the food packaging roll body 1 captured by the imaging sensor 20 and highlighting it on the display 31; measuring the area, which is a characteristic value of the highlighted core end 3; comparing the measured area value with predetermined upper and lower threshold ranges; judging the food packaging roll body 1 to be a good product with no winding misalignment if the area value is within the predetermined upper and lower threshold ranges as a result of the comparison; judging the food packaging roll body 1 to be a defective product with winding misalignment if the area value is outside the predetermined upper and lower threshold ranges as a result of the comparison; and displaying at least the judgment result on the display 31 of a computer device or a dedicated display 31 to notify the user.

[0038] The cardboard tube end 3 is displayed on the display 31 for data analysis, and when displayed, it is highlighted with a chromatic color C such as green by filtering or the like to facilitate the inspection work (see the shaded area in Figure 5). The area of ​​this cardboard tube end 3 is measured, because when measuring the protruding length of the cardboard tube end 3, the wavy side part 5 of the wrap film 4 is located near the end face of the end 3 of the cardboard tube 2, which may adversely affect high-precision measurement. In addition, the diameter of the cardboard tube 2 is always constant, which is suitable for measuring the area of ​​the cardboard tube end 3.

[0039] Test results showed that the area of ​​the cardboard tube end 3 can be easily measured by capturing an image of the image sensor 20 so that the end face of the cardboard tube 2 of the food packaging roll 1 transported to the intended imaging location and the side 5 of the wrap film 4 are parallel, making it possible to achieve highly accurate measurements.

[0040] The predetermined upper and lower threshold ranges can be determined from test results, past experience, etc. In addition, the judgment result is displayed as "OK" if the food packaging roll body 1 is a non-defective product with no winding misalignment, and as "NG" if the food packaging roll body 1 is a defective product with winding misalignment.

[0041] The controller is, for example, a programmable controller (PLC) or the like that can control equipment using a program that can be changed by the user, and is connected to the cartoner device via a cable, etc. This controller realizes a function to continue the operation of the cartoner device when the inspection and judgment means 30 judges the food packaging roll body 1 to be a non-defective product, and a function to automatically eject the defective product from the production line when the inspection and judgment means 30 judges the food packaging roll body 1 to be a defective product.

[0042] In the above configuration, the food packaging roll body 1 is transported from the roller conveyor 10 to the hanger conveyor 11 while rotating, and the food packaging roll body 1 is suspended from the hanger of the hanger conveyor 11 and transported to the location to be imaged while being positioned, and both ends of the food packaging roll body 1 are illuminated from above by a pair of image sensors 20 and imaged.

[0043] During this imaging, if the food packaging roll body 1 is a non-defective product, both end portions 3 of the cardboard tube 2 protrude by an appropriate length from both side portions 5 of the roll-shaped wrap film 4, so that both end portions 3 of the cardboard tube 2 are imaged from above. In contrast, if the food packaging roll body 1 is a defective product, one end portion 3 of the cardboard tube 2 protrudes by an excessive length from one side portion 5 of the roll-shaped wrap film 4, and the other end portion 3 of the cardboard tube 2 is either slightly exposed from the other side portion 5 of the wrap film 4 or is buried within the other side portion 5 of the wrap film 4, so that at least one end portion 3 of the cardboard tube 2 is imaged from above. In addition, the imaging timing of the pair of imaging sensors 20 is shifted from the timing of momentary pulse illumination as necessary to prevent halation (a phenomenon in which an area hit by a strong light beam becomes white and blurred).

[0044] Next, when both ends of the food packaging roll 1 are imaged by the pair of imaging sensors 20, the inspection and judgment means 30 applies a chromatic color C to the core end 3 protruding from the wrap film 4 in the image of the food packaging roll 1 imaged by the imaging sensors 20, highlighting it on the display 31, measures the area of ​​this highlighted paper tube end 3 with chromatic color C, and compares this measured area value with predetermined upper and lower threshold ranges.

[0045] In the case of a non-defective food packaging roll body 1, both ends 3 of the paper tube 2 protrude by an appropriate length, so when the area value of each end 3 is compared with the predetermined upper and lower threshold ranges, it is always within the predetermined upper and lower threshold ranges. In contrast, in the case of a defective product, the other end 3 of the paper tube 2 is slightly exposed or buried within the other side 5 of the wrap film 4, so when the area value of the other end 3 of the paper tube 2 is compared with the predetermined upper and lower threshold ranges, it is always outside the predetermined upper and lower threshold ranges.

[0046] If the measured area value is within the predetermined upper and lower threshold range as a result of the comparison, the inspection and judgment means 30 judges the food packaging roll body 1 to be a good product with no winding misalignment, and displays the word "OK" on the display 31 together with the necessary bibliographic information (see FIG. 5). If a food packaging roll body 1 is judged to be a good product, its overall appearance is imaged by the overall imaging sensor 14 downstream of the hanger conveyor 11, and it is finally inspected for wrinkles, winding misalignment, etc. and judged to be good or bad. If a food packaging roll body 1 is finally judged to be a good product, it is packed into an opened presentation box by the cartoner mechanism 15 and sealed.

[0047] On the other hand, if the comparison result shows that the measured area value is outside the predetermined upper and lower threshold range, the inspection and judgment means 30 judges the food packaging roll 1 to be a defective product with a winding misalignment, and displays the word "NG" on the display 31 together with the necessary bibliographic information. At this time, the word "NG" can be displayed on the display 31 in a flashing manner, or while sounding a warning sound. Food packaging rolls 1 judged to be defective are automatically discharged from the hanger conveyor 11 to outside the production line.

[0048] According to the above configuration, a dedicated imaging sensor 20 is added to automatically image and inspect both ends of the food packaging roll body 1, so that it is possible to reliably inspect the appropriate protrusion of both ends 3 of the cardboard tube 2. This effect is extremely meaningful because the outer peripheral surface of the cardboard tube 2 and the transparent wrap film 4 are prone to causing halation, making inspection and judgment difficult. In addition, since there is no need to raise the inspection standard level, it is possible to prevent a large number of food packaging roll bodies 1 being judged as defective and to prevent difficulties in mass-producing food packaging roll bodies 1.

[0049] Also, since there is no need to visually inspect both ends of all food packaging roll bodies 1, there is no risk of inspection errors during mass production of food packaging roll bodies 1, and manufacturing costs can be reduced. Furthermore, instead of a bucket conveyor with a black background, multiple image capture sensors 20 are installed on the hanger conveyor 11 that clamps and transports the food packaging roll body 1 while suspending it, so that the posture and end position of the food packaging roll body 1 are stable, light is less likely to be reflected, and clear images can be obtained. Furthermore, the entire inspected food packaging roll body 1, including the ends, is re-inspected by the entire image capture sensor 14, so it is possible to eliminate the risk of missing an inspection.

[0050] The wrap film 4 in the above embodiment may be a resin film made of polyethylene resin, polyvinylidene chloride resin, polyolefin resin, polyethylpentene resin, etc. Also, in the above embodiment, a pair of left and right bars 13 is shown as the mounting members, but this is not limited thereto, and for example, a flat, roughly #-shaped mounting member may be used. Also, a required number of overall image sensors 14 may be installed upstream of the hanger conveyor 11 in the above embodiment.

[0051] Furthermore, when it is desired to improve the predetermined upper and lower threshold ranges and the accuracy of the inspection, the core end 3 may be displayed in black and white to improve the resolution, rather than applying chromatic color C to highlight the end on the display 31. In this case, the inspection and judgment means 30 realizes the following functions: displaying in black and white on the display 31 the core end 3 protruding from the wrap film 4 in the image of the food packaging roll body 1 captured by the imaging sensor 20; measuring the area of ​​the core end 3 displayed in black and white, which is a characteristic value of the core end 3; comparing the measured area value with predetermined upper and lower threshold ranges; judging the food packaging roll body 1 to be a good product without a winding misalignment if the area value is within the predetermined upper and lower threshold ranges; judging the food packaging roll body 1 to be a defective product with a winding misalignment if the area value is outside the predetermined upper and lower threshold ranges; and displaying at least the judgment result on the display 31 of the computer device or a dedicated display 31 to notify the user.

[0052] In addition, if no problems arise, the inspection and judgment means 30 of the above embodiment may be configured to have the following functions: measure the protruding length of the core end protruding from the wrap film 4 in the image of the food packaging roll body 1 captured by the image sensor 20; compare the measured protruding length with a predetermined upper and lower threshold range; and judge the food packaging roll body 1 to be a good product without winding misalignment if the protruding length exceeds the predetermined upper and lower threshold range; and judge the food packaging roll body 1 to be a defective product with winding misalignment if the protruding length is equal to or less than the predetermined upper and lower threshold range. In addition, the measurement state of the area of ​​the cardboard tube end 3 and the measured value of the measured area may be displayed. Furthermore, all of the technologies described in this specification are subject to rights acquisition through amendment or divisional application, etc. [Industrial Applicability]

[0053] The food packaging roll inspection device according to the present invention is used in the field of food packaging roll manufacturing. [Explanation of symbols]

[0054] 1 Food packaging roll 2 Paper tube (core) 3 End 4. Plastic wrap (food sheet) 5 Side 10 Roller Conveyor 11 Hanger conveyor 13. Bar 14 Overall imaging sensor (overall imaging means) 15 Cartoner mechanism 20 Imaging sensor (imaging means) 30 Inspection and Judgment Method 31 Display C Chromatic color (color)

Claims

1. A food packaging roll inspection device for inspecting a food packaging roll having a strip-shaped food sheet wound around a core, comprising: The food packaging roll body is transported by a conveyor. ... The plurality of imaging means are installed on both sides of a hanger conveyor that sandwiches the food packaging roll body and transports it obliquely upward, The inspection and judgment means of the food packaging roll inspection device is characterized by having the functions of measuring the characteristic values ​​of the end of the core protruding from the food sheet in the image of the food packaging roll captured by the imaging means, comparing the measured characteristic values ​​with predetermined upper and lower threshold ranges, and judging the quality of the food packaging roll based on the results of the comparison.

2. 2. The food packaging roll inspection device according to claim 1, further comprising: an overall imaging means arranged downstream of the plurality of imaging means for imaging the entire food packaging roll; and a cartoning mechanism arranged downstream of the overall imaging means for packing the food packaging roll into an open cosmetic box and sealing it.

3. 3. An inspection device for food packaging roll bodies according to claim 1 or 2, wherein the imaging means images the center of the food packaging roll body transported to the intended imaging location on the hanger conveyor within an angle range of -5° to +5° from above so that the core end face of the food packaging roll body and the side of the food sheet are approximately parallel to each other.

4. The inspection and judgment means of the food packaging roll inspection device described in claim 1 or 2 has the functions of measuring the area of ​​the core end protruding from the food sheet in the image of the food packaging roll captured by the imaging means, comparing this measured area value with a predetermined upper and lower threshold range, and judging the food packaging roll to be a good product with no winding misalignment if the area value is within the predetermined upper and lower threshold range as a result of the comparison, and judging the food packaging roll to be a defective product with winding misalignment if the area value is outside the predetermined upper and lower threshold range as a result of the comparison.

5. 3. The inspection and judgment means of the food packaging roll inspection device according to claim 1 or 2, which has the functions of: applying color to the core end protruding from the food sheet in the image of the food packaging roll captured by the imaging means and highlighting it on the screen; measuring the area of ​​the core end highlighted on the screen; comparing the measured area value with predetermined upper and lower threshold ranges; judging the food packaging roll to be a good product with no winding misalignment if the area value is within the predetermined upper and lower threshold ranges as a result of the comparison; and judging the food packaging roll to be a defective product with winding misalignment if the area value is outside the predetermined upper and lower threshold ranges as a result of the comparison.

Images