Blanks Inspection System

Abstract

To provide a blanks inspection system which can correctly compare a master image with a print image printed on a printing surface of a blank for box without performing master addition even when the plurality of master images exist, and correctly determine whether the print image relative to the master image is good or bad.SOLUTION: A blanks inspection system (blanks inspection machine 10) stores first to n-th identifiers corresponding to first to n-th master images, prints an identifier corresponding to each of images printed on printing surfaces of a plurality of blanks for box on prescribed spots of the blanks for box, reads the identifier printed on the prescribed spot of the blank for box, selects the identifier corresponding to the read identifier among the stored first to n-th identifiers, extracts a master image corresponding to the selected identifier, and compares the extracted master image with the print image printed on the printing surface of each blank for box.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a blank inspection system. [Background technology]

[0002] A method for detecting the printing start timing for offset printing has been disclosed in which a master pattern, which is the standard for determining whether the print is good or bad, is used each time a printed item is inspected, and the inspection pattern for that printed item is successively rewritten as a new master pattern. This pattern matching is performed on printed items printed when printing starts on an offset printing press and when printing resumes after the blanket cylinder of the offset printing press has been cleaned, and a matching is obtained in which the pattern difference between the master pattern and the inspection pattern disappears, thereby detecting the printing start timing (see Patent Document 1).

[0003] As an example of pattern matching to determine whether the print pattern of a printed matter printed by offset printing is good or bad, a master pattern that serves as the standard for determining whether the print is good or bad is obtained from the print pattern of a normal printed matter corresponding to a good product, and signals related to the print patterns (inspection patterns) of the printed matters printed sequentially are compared with signals related to the master pattern to detect whether there is a signal difference (pattern difference). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-94941 Summary of the Invention [Problem to be solved by the invention]

[0005] In pattern matching for the printed images printed on the printing surfaces of a plurality of blanked box blanks, a plurality of first to nth master images corresponding to the various different printed images printed on the printing surfaces of the box blanks are stored, and a master image corresponding to the printed image printed on the printing surface of each of the stored first to nth master images is compared with the printed image printed on the printing surface of each box blank in a randomly collated group of box blanks, and as a result of comparing the master image with the printed image, the printed image printed on the printing surface of each box blank is judged to be pass or fail relative to the master image. Box blanks with printed images judged to be failing are automatically removed from the collated group of box blanks.

[0006] Furthermore, when multiple master images exist, these master images are read (stored) into the blanks inspection machine, and the image data combining these master images is registered in the blanks inspection machine as a master (master addition). However, the master image is one in which multiple images overlap, and it is difficult to compare the master images with the printed image in the overlapping areas. This makes it impossible to accurately compare the printed image with the master image, and it is not possible to accurately determine whether the printed image is good or bad compared to the master image. Furthermore, the accuracy of comparison between the printed image and the master image decreases, and there are cases in which a bad printed image printed on a box blank is determined to be good.

[0007] An object of the present invention is to provide a blank inspection system that can accurately compare a printed image printed on the printing surface of a box blank with a master image without performing master addition, even when multiple master images exist, and can accurately determine whether the printed image is good or bad compared to the master image.Furthermore, an object of the present invention is to provide a blank inspection system that does not reduce the accuracy of comparison between a printed image and a master image, does not determine that a bad printed image printed on a box blank is good, and can reliably remove box blanks with bad printed images printed on them. [Means for solving the problem]

[0008] The premise of the present invention for solving the above problem is a blank inspection system that includes a master image storage means that stores a variety of multiple 1st to nth master images corresponding to various different printed images printed on the printing surface of a plurality of blanked box blanks, an image comparison means that compares the printed image printed on the printing surface of each box blank with a master image corresponding to the printed image printed on the printing surface of each box blank among the 1st to nth master images stored by the master image storage means, and a pass / fail judgment means that, based on the comparison of the master image and the printed image by the image comparison means, judges whether the printed image printed on the printing surface of each box blank is pass or fail compared to the master image.

[0009] A feature of the boxes of the present invention based on the above premise is that the blanks inspection system includes an identifier storage means for storing 1st to nth identifiers corresponding to the 1st to nth master images, an identifier printing means for printing identifiers corresponding to each image printed on the printing surface of a plurality of box blanks at predetermined locations on those box blanks, an identifier reading means for reading the identifiers printed at predetermined locations on the box blanks, and a master image extraction means for selecting an identifier corresponding to the identifier read by the identifier reading means from the 1st to nth identifiers stored by the identifier storage means and extracting a master image corresponding to the selected identifier, and an image comparison means for comparing the master image extracted by the master image extraction means with the printed image printed on the printing surface of each box blank.

[0010] In one example of a box of the present invention, an identifier reading means reads the identifier of a group of box blanks that are randomly collated from a plurality of box blanks with various different printed images printed on their printing surfaces, a master image extraction means selects an identifier that corresponds to the identifier of the group of box blanks read by the identifier reading means from the first to nth identifiers stored by the identifier storage means, extracts a master image corresponding to the selected identifier, and an image comparison means compares the master image corresponding to the selected identifier with the printed image of the box blank on which the read identifier is printed.

[0011] Another example of a box of the present invention is a blank inspection system that includes a master image selection means that selects multiple master images or a specific master image from the first to nth master images, an identifier extraction means that extracts an identifier corresponding to the master image selected by the master image selection means from the first to nth identifiers stored by the identifier storage means, and a first box blank sorting means that sorts box blanks in a group of collated box blanks that have printed thereon an identifier corresponding to the identifier extracted by the identifier extraction means.

[0012] In another example of a box of the present invention, a master image extraction means extracts a master image corresponding to the identifier extracted by the identifier extraction means, and an image comparison means compares the master image corresponding to the identifier extracted by the identifier extraction means with a printed image printed on the printing surface of a box blank selected by the box blank selection means.

[0013] Another example of a box of the present invention is a blank inspection system that includes an identifier input means for inputting an identifier corresponding to each selected master image or an identifier corresponding to the selected specific master image when multiple master images or a specific master image is selected from the first to nth master images, and a second box blank sorting means for sorting box blanks in a group of collated box blanks that have printed thereon an identifier corresponding to the identifier input by the identifier input means.

[0014] In another example of a box of the present invention, a master image extraction means extracts a master image corresponding to an identifier input by an identifier input means, and an image comparison means compares the master image corresponding to the identifier input by the identifier input means with a printed image printed on the printing surface of a box blank selected by a box blank selection means.

[0015] In another embodiment of the box of the present invention, the identifier is printed on the same side as the printing surface of the glue tab or flap of the box blank.

[0016] In another embodiment of the box of the present invention, the identifier is a bar code or a number.

[0017] In another example of a box of the present invention, the blank inspection system is connected to a sack machine that assembles boxes from box blanks having printed images on their printing surfaces, and before the box blanks are assembled into boxes, the blank inspection system compares the printed images printed on the printing surfaces of the box blanks with a master image.

[0018] In another example of the box of the present invention, the speed at which the image comparing means compares the printed image with the master image is in the range of 42,000 to 48,000 box blanks per hour. [Effects of the Invention]

[0019] According to the blank inspection system of the present invention, first to nth identifiers corresponding to first to nth master images are stored, identifiers corresponding to each image printed on the printing surface of the box blank are printed at predetermined locations on the box blanks, the identifiers printed at the predetermined locations on the box blanks are read, an identifier corresponding to the read identifier from the stored first to nth identifiers is selected, a master image corresponding to the selected identifier is extracted, and the extracted master image is compared with the printed image printed on the printing surface of each box blank. Therefore, multiple master images are stored in association with the identifiers, an identifier corresponding to the read identifier from the stored first to nth identifiers is selected, and a master image corresponding to the selected identifier is extracted, and the extracted master image is compared with the printed image printed on the printing surface of each box blank. This eliminates the need for master addition, which registers image data combining multiple master images as a master, and allows the master image corresponding to the identifier to be compared with the printed image of the box blank on which the identifier is printed. This allows the printed image printed on the printing surface of the box blank to be accurately compared with the master image, making it possible to accurately determine whether the printed image is good or bad compared to the master image. The blanks inspection system does not reduce the accuracy of comparison between the printed image and the master image, and does not judge a defective printed image printed on a box blank as being good, so that box blanks on which a defective printed image is printed can be surely removed.

[0020] The blanks inspection system reads the identifiers of a group of collated box blanks (a collection of box blanks) formed by randomly (arbitrarily) collating (grouping together) a plurality of box blanks having various different printed images printed on their printing surfaces, selects an identifier corresponding to the identifier of the group of collated box blanks read from among the stored 1st to nth identifiers, extracts a master image corresponding to the selected identifier, and compares the master image corresponding to the extracted identifier with the printed image of the box blank on which the read identifier is printed. Even if the plurality of box blanks having various different printed images printed on their printing surfaces are collated (grouped together) at random (arbitrarily), the blanks inspection system reads the identifiers of a group of collated box blanks (a collection of box blanks) formed from those box blanks, and selects an identifier corresponding to the identifier of the group of collated box blanks read from among the stored 1st to nth identifiers. While selecting an identifier corresponding to the identifier of the read collated group of box blanks, a master image corresponding to the selected identifier is extracted, and the master image corresponding to the extracted identifier is compared with the printed image of the box blank on which the read identifier is printed. This eliminates the need for master addition, which registers image data combining multiple master images as a master, and allows the master image corresponding to the identifier to be compared with the printed image of the box blank on which the identifier is printed. This allows the printed image printed on the printing surface of each box blank in a collated group of box blanks (a collection of box blanks) in which multiple box blanks are randomly (arbitrarily) collated (grouped) to be accurately compared with the master image, making it possible to accurately determine whether the printed image is good or bad compared to the master image. The blank inspection system does not reduce the accuracy of the comparison between the printed image and the master image, and does not judge defective printed images printed on box blanks from a collated group of box blanks in which multiple box blanks are randomly collated as good, allowing box blanks on which defective printed images are printed to be reliably removed.

[0021] A blank inspection system selects multiple master images or a specific master image from the first to nth master images, extracts an identifier corresponding to the selected master image from the stored first to nth identifiers, and selects box blanks in a group of collated box blanks that have an identifier printed thereon corresponding to the extracted identifier.By selecting multiple master images or a specific master image from the first to nth master images, box blanks in a group of collated box blanks (a collection of box blanks) are selected, so that only box blanks that have the same printed image as the selected master image can be extracted, and only boxes that have the same printed image as the selected master image can be produced.

[0022] A blank inspection system that extracts a master image corresponding to the extracted identifier and compares the master image corresponding to the extracted identifier with the printed image printed on the printing surface of a selected box blank can compare the master image corresponding to the extracted identifier with the printed image printed on the printing surface of a selected box blank, and can accurately compare the printed image printed on the printing surface of a box blank on which an identifier corresponding to the extracted identifier is printed with the master image, thereby accurately determining whether the printed image is good or bad compared to the master image.

[0023] When multiple master images or a specific master image is selected from the 1st to nth master images, an identifier corresponding to each selected master image or an identifier corresponding to the selected specific master image is input, and box blanks on which an identifier corresponding to the input identifier is printed are selected from those box blanks in a group of collated box blanks.By inputting a specified identifier, box blanks on which an identifier corresponding to the input identifier is printed are selected from those box blanks in a group of collated box blanks (a collection of box blanks), so it is possible to extract only box blanks on which a printed image identical to the master image corresponding to the input identifier is printed, and it is possible to produce only boxes on which a printed image identical to the master image corresponding to the input identifier is printed.

[0024] A blank inspection system that extracts a master image corresponding to an input identifier and compares the master image corresponding to the input identifier with the printed image printed on the printing surface of a selected box blank can compare the master image corresponding to the input identifier with the printed image printed on the printing surface of a selected box blank, and can accurately compare the printed image printed on the printing surface of a box blank on which an identifier corresponding to the input identifier is printed with the master image, thereby accurately determining whether the printed image is good or bad compared to the master image.

[0025] In a blank inspection system in which an identifier is printed on the same side as the printed surface of the glue tab or flap of a box blank, by printing the identifier on the glue tab or flap of the box blank, the identifier is not exposed on the outer surface of the box when the box blanks are assembled into a box, and the identifier can be concealed, preventing the identifier from being visible to purchasers of the goods contained in the box, etc.

[0026] In a blank inspection system in which the identifier is a barcode or a number, multiple master images are stored in correspondence with the barcodes or numbers, and a barcode corresponding to the read barcode is selected from the stored barcodes, or a number corresponding to the read number is selected from the stored numbers, and a master image corresponding to the selected barcode or selected number is selected.The selected master image is compared with the printed image printed on the printing surface of each box blank, eliminating the need to perform master addition to register image data combining multiple master images as a master.The master image corresponding to the barcode can be compared with the printed image of the box blank on which that barcode is printed, and the printed image printed on the printing surface of the box blank can be accurately compared with the master image, making it possible to accurately determine whether the printed image is good or bad compared to the master image.

[0027] A blanks inspection system is connected to a sack machine that assembles boxes from box blanks having printed images on their printing surfaces, and the blanks inspection system compares the printed image printed on the printing surface of the box blank with a master image before the box blanks are assembled into boxes in the sack machine.By connecting the blanks inspection system to the sack machine, the printed image is compared with the master image before the box blanks are assembled into boxes, making it possible to prevent the wasteful assembly of box blanks having defective printed images printed on them.The blanks inspection system can assemble into boxes only box blanks having printed images that are determined to be good compared to the master image, making it possible to prevent boxes having defective printed images printed on them from being distributed on the market.

[0028] A blanks inspection system having a comparison speed between a printed image and a master image in the range of 42,000 to 48,000 box blanks per hour can quickly compare the printed image of a box blank printed with a printed image with the master image, and can quickly determine whether the printed image is good or bad compared to the master image. Because the blanks inspection system can quickly determine whether the printed image is good or bad compared to the master image, when the blanks inspection system is connected to a sack machine, for example, it can sufficiently keep up with the box assembly speed in the sack machine, and box blanks printed with good printed images can be efficiently assembled into boxes in the sack machine. [Brief explanation of the drawings]

[0029] [Figure 1] FIG. 1 is a perspective view of a blank inspection machine shown as an example. [Figure 2] FIG. 2 is a developed plan view showing an example of first to fourth box blanks that have been blanked. [Figure 3] FIG. 10 is a developed plan view showing another example of the first to fourth box blanks that have been blanked. [Figure 4] 4 is a flowchart illustrating an example of each means performed in the blank inspection system. [Figure 5] 10 is a flowchart illustrating another example of each means performed in the blank inspection system. [Figure 6] 10 is a flowchart illustrating another example of each means performed in the blank inspection system. DETAILED DESCRIPTION OF THE INVENTION

[0030] The blank inspection system according to the present invention will be described in detail below with reference to the accompanying drawings, such as Fig. 1, which is a perspective view of an example blank inspection machine 10. Fig. 2 is an exploded plan view showing an example of blanked first to fourth box blanks 11a to 11d.

[0031] The blank inspection system compares the printed image 13 printed on the printing surface 12 (front surface) of the box blank 11 with a master image to determine whether the printed image 13 is acceptable or unacceptable relative to the master image. While four first through fourth box blanks 11a through 11d, 11e through 11h are shown in FIG. 2 and FIG. 3 (described later), the number of box blanks 11 is not particularly limited. The blank inspection system can compare the printed images 13 of more than four first through nth box blanks with the first through nth master images to determine whether the printed images 13 of the first through nth box blanks are acceptable or unacceptable relative to the master image. The developed planar shapes of the first through fourth box blanks 11a through 11d, 11e through 11h are examples, and the developed planar shapes can be freely set. Boxes made from the box blank 11 include not only all boxes currently in use, but also all types (shapes) of boxes developed in the future.

[0032] Specific examples of boxes that can be made from the box blank 11 on which the printed image 13 is printed include sack boxes, lid-type pasted boxes, inlay-type pasted boxes, caramel boxes, bottom-jag boxes, bottom-one-touch boxes, gift boxes, inro boxes, book-type boxes, carry-type boxes, hanger-type boxes, pillow-type boxes, assembled boxes (with frames), assembled boxes (without frames), N-type boxes, sleeve boxes, paper tubes (spiral), paper tubes (flat-wound), paper tubes (sealed), paper tubes (flat), paper tubes (inro), paper tubes (cover), paper tubes (outline cases), pasted boxes (covers), pasted boxes (inro), pasted boxes (book), pasted boxes (hinge), die-cut boxes, one-piece boxes, V-cut boxes, clear cases, specially pasted four-corner boxes, cake boxes, flat-fastened boxes, corrugated cardboard boxes, and free-design boxes.

[0033] Specific examples of materials (substrates) for the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) include paper (paperboard), synthetic resin sheets (plastic sheets), and composite sheets. Examples of paper (paperboard) include chipboard, kraft paper, coated cardboard, uncoated cardboard, coated ivory, corrugated cardboard, high-quality paperboard, specialty paperboard, non-wood paper, and thinned wood paper. Examples of synthetic resin sheets include PP sheets and PET sheets. Synthetic resin sheets may be colored transparent, colored translucent, colorless transparent, or colorless translucent. Examples of composite sheets include laminated sheets of paper and synthetic resin sheets, aluminum-coated paper, foil paper, fancy paper, water-resistant and oil-resistant paper, heat-resistant paper, and antibacterial paperboard. Boxes may be subjected to various surface treatments (press coating, UV coating, film coating). There are no particular limitations on the materials for the first to fourth box blanks 11a to 11d, 11e to 11h, and the materials for the first to fourth box blanks 11a to 11d, 11e to 11h include not only materials currently in use but also any materials that may be used in the future.

[0034] The first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) are blanked into planar shapes of predetermined areas. The first to fourth box blanks 11a to 11d, 11e to 11h are formed from a front plate 14 and a back plate 15 that are cut into a rectangular shape, a first side plate 16 and a second side plate 17 that are cut into a rectangular shape, a top plate 18 and a bottom plate 19 that are cut into a substantially rectangular shape, a side margin 20 that is cut into a substantially rectangular shape, a top margin 21 and a bottom margin 22 that are cut into a substantially rectangular shape, and first to fourth flaps 23a to 23d that are cut into a substantially rectangular shape.

[0035] In the first to fourth box blanks 11a to 11d, 11e to 11h, the front plate 14 and the first side plate 16 are connected via the side edges of those plates 14, 16, the front plate 14 and the second side plate 17 are connected via the side edges of those plates 14, 17, the back plate 15 and the second side plate 17 are connected via the side edges of those plates 15, 17, and the back plate 15 and the side gluing margin 20 are connected via the side edges of those plates 15, 20.

[0036] The front plate 14 and the top plate 18 are connected via the edges of the plates 14, 18, the front plate 14 and the bottom plate 19 are connected via the edges of the plates 14, 19, the back plate 15 and the top surface adhesive margin 21 are connected via the edges of the plates 15, 21, and the back plate 15 and the bottom surface adhesive margin 22 are connected via the edges of the plates 15, 22. Furthermore, the first side plate 16 and the first flap 23a are connected via their edges, the first side plate 16 and the second flap 23b are connected via their edges, the second side plate 17 and the third flap 23c are connected via their edges, and the second side plate 17 and the fourth flap 23d are connected via their edges.

[0037] A predetermined printed image 13 (design) (such as an offset printing pattern, a flexographic printing pattern, or a gravure printing pattern) is printed on the printing surface 12 (surface) of the front plate 14 of each of the first to fourth box blanks 11a to 11d, 11e to 11h (each of the first to nth box blanks) by offset printing, flexographic printing, gravure printing, or the like. The printed images 13 (designs) printed on the printing surface 12 of the front plate 14 are different for each of the box blanks 11a to 11d, 11e to 11h. There are no particular limitations on the form (pictures, patterns, symbols, letters, etc.) of the printed images 13 (designs) printed on the printing surfaces 12 of the box blanks 11a to 11d, 11e to 11h, and the form of the printed images 13 (designs) can be freely set.

[0038] As shown in (a) of Figure 2, a first barcode 24a (one-dimensional barcode) (first identifier) ​​(an identifier corresponding to the printed image 13 printed on the printing surface 12 of the first box blank 11a) is printed on the side glue margin 20 of the first box blank 11a (a predetermined location on the box blank 11a) (identifier printing means) which indicates (represents) the printed image 13 (pattern) (offset printing pattern, flexographic printing pattern, gravure printing pattern, etc.) printed on the printing surface 12 (surface) of the front plate 14 of the first box blank 11a.

[0039] The first barcode 24a (first identifier) ​​is printed on the side margin 20 of the first box blank 11a when the printed image 13 (design) is printed by offset printing, flexographic printing, gravure printing, or the like. The first barcode 24a (one-dimensional barcode) indicating (representing) the printed image 13 (design) of the first box blank 11a may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the first box blank 11a. Also, a first QR code (two-dimensional barcode) (first identifier) ​​(registered trademark) indicating (representing) the printed image 13 (design) of the first box blank 11a may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the first box blank 11a.

[0040] As shown in (b) of Figure 2, a second barcode 24b (one-dimensional barcode) (second identifier) ​​(an identifier corresponding to the printed image 13 printed on the printing surface 12 of the second box blank 11b) is printed on the side glue margin 20 of the second box blank 11b (a predetermined location on the box blank 11b) (identifier printing means) which indicates (represents) the printed image 13 (pattern) (offset printing pattern, flexographic printing pattern, gravure printing pattern, etc.) printed on the printing surface 12 (surface) of the front plate 14 of the second box blank 11b.

[0041] The second barcode 24b (second identifier) ​​is printed on the side margin 20 of the second box blank 11b when the printed image 13 (design) is printed by offset printing, flexographic printing, gravure printing, or the like. The second barcode 24b (one-dimensional barcode) indicating (representing) the printed image 13 (design) of the second box blank 11b may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the second box blank 11b. Furthermore, a second QR code (two-dimensional barcode) (second identifier) ​​indicating (representing) the printed image 13 (design) of the second box blank 11b may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the second box blank 11b.

[0042] As shown in (c) of Figure 2, a third barcode 24c (one-dimensional barcode) (third identifier) ​​(an identifier corresponding to the printed image 13 printed on the printing surface 12 of the third box blank 11c) is printed on the side glue margin 20 (a predetermined location on the box blank 11c) of the third box blank 11c (identifier printing means) which indicates (represents) the printed image 13 (pattern) (offset printing pattern, flexographic printing pattern, gravure printing pattern, etc.) printed on the printing surface 12 (surface) of the front plate 14 of the third box blank 11c.

[0043] The third barcode 24c (third identifier) ​​is printed on the side margin 20 of the third box blank 11c when the printed image 13 (design) is printed by offset printing, flexographic printing, gravure printing, or the like. The third barcode 24c (one-dimensional barcode) indicating (representing) the printed image 13 (design) of the third box blank 11c may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the third box blank 11c. Furthermore, a third QR code (two-dimensional barcode) (third identifier) ​​indicating (representing) the printed image 13 (design) of the third box blank 11c may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the third box blank 11c.

[0044] As shown in (d) of Figure 2, a fourth barcode 24d (one-dimensional barcode) (fourth identifier) ​​(an identifier corresponding to the printed image 13 printed on the printing surface 12 of the fourth box blank 11d) is printed on the side adhesive margin 20 (a designated location on the box blank 11d) of the fourth box blank 11d (identifier printing means) which indicates (represents) the printed image 13 (pattern) (offset printing pattern, flexographic printing pattern, gravure printing pattern, etc.) printed on the printing surface 12 (surface) of the front plate 14 of the fourth box blank 11d.

[0045] The fourth barcode 24d (fourth identifier) ​​is printed on the side margin 20 of the fourth box blank 11d when the printed image 13 (design) is printed by offset printing, flexographic printing, gravure printing, or the like. The fourth barcode 24d (one-dimensional barcode) indicating (representing) the printed image 13 (design) of the fourth box blank 11d may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the fourth box blank 11d. Furthermore, a fourth QR code (two-dimensional barcode) (fourth identifier) ​​indicating (representing) the printed image 13 (design) of the fourth box blank 11d may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the fourth box blank 11d.

[0046] Furthermore, when different first to nth printed images 13 are printed on the printing surfaces 12 (front surfaces) of the first to nth box blanks 11, first to nth barcodes (first to nth identifiers) indicating (representing) the first to nth printed images 13 are printed on any of the side adhesive margins 20, top adhesive margins 21, bottom adhesive margins 22, or first to fourth flaps 23a to 23d of the first to nth box blanks 11 (identifier printing means).

[0047] Fig. 3 is a developed plan view showing another example of the blanked first to fourth box blanks 11e to 11h. A first numerical value 25a (first identifier) ​​(an identifier corresponding to the printed image 13 printed on the printing surface 12 of the first box blank 11e) indicating (representing) the printed image 13 (design) (offset printing pattern, flexographic printing pattern, gravure printing pattern, or the like) printed on the printing surface 12 (front surface) of the front plate 14 of the first box blank 11e is printed on the side margin 20 (a predetermined portion of the box blank 11e) of the first box blank 11e shown in Fig. 3(a) (identifier printing means).

[0048] The first numerical value 25a (first identifier) ​​is printed on the side margin 20 of the first box blank 11e when the printed image 13 (design) is printed by offset printing, flexographic printing, gravure printing, or the like. The first numerical value 25a (first identifier) ​​indicating (representing) the printed image 13 (design) of the first box blank 11e may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the first box blank 11e. There is no limit to the number of digits of the first numerical value 25a, and it may be selected arbitrarily and arranged randomly.

[0049] The first box blanks 11a and 11e may have a unique first identifier printed thereon in addition to the first barcode 24a (first identifier) ​​printed thereon in Fig. 2(a) and the first numerical value 25a (first identifier) ​​printed thereon in Fig. 3(a). The unique first identifier may be any combination (random) of at least two of letters, symbols, designs, or numerical values, letters, symbols, and designs.

[0050] A second numerical value 25b (second identifier) ​​(an identifier corresponding to the printed image 13 printed on the printing surface 12 of the second box blank 11f) indicating (representing) the printed image 13 (pattern) (offset printing pattern, flexographic printing pattern, gravure printing pattern, etc.) printed on the printing surface 12 (surface) of the front plate 14 of the second box blank 11f is printed on the side glue margin 20 (a predetermined location on the box blank 11f) shown in Figure 3 (b) (identifier printing means).

[0051] The second numerical value 25b (second identifier) ​​is printed on the side margin 20 of the second box blank 11f when the printed image 13 (design) is printed by offset printing, flexographic printing, gravure printing, or the like. The second numerical value 25b (second identifier) ​​indicating (representing) the printed image 13 (design) of the second box blank 11f may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the second box blank 11f. There is no limit to the number of digits of the second numerical value 25b, and it may be selected arbitrarily and arranged randomly.

[0052] The second box blanks 11b and 11f may have a unique second identifier printed thereon in addition to the second barcode 24b (second identifier) ​​printed thereon in Fig. 2(b) and the second numerical value 25b (second identifier) ​​printed thereon in Fig. 3(b). The unique second identifier may be any combination (random) of at least two of letters, symbols, designs, or numerical values, letters, symbols, and designs.

[0053] The side glue margin 20 (a predetermined location on the box blank 11g) of the third box blank 11g shown in (c) of Figure 3 is printed with a third numerical value 25c (third identifier) ​​(an identifier corresponding to the printed image 13 printed on the printing surface 12 of the third box blank 11g) that indicates (represents) the printed image 13 (pattern) (offset printing pattern, flexographic printing pattern, gravure printing pattern, etc.) printed on the printing surface 12 (surface) of the front plate 14 of the third box blank 11g (identifier printing means).

[0054] The third numerical value 25c (third identifier) ​​is printed on the side margin 20 of the third box blank 11g when the printed image 13 (design) is printed by offset printing, flexographic printing, gravure printing, or the like. The third numerical value 25c (third identifier) ​​indicating (representing) the printed image 13 (design) of the third box blank 11g may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the third box blank 11g. There is no limit to the number of digits of the third numerical value 25c, and it may be selected arbitrarily and arranged randomly.

[0055] The third box blanks 11c and 11g may have a unique third identifier printed thereon in addition to the third barcode 24c (third identifier) ​​printed thereon in Fig. 2(c) and the third numerical value 25c (third identifier) ​​printed thereon in Fig. 3(c). The unique third identifier may be any (random) combination of at least two of letters, symbols, designs, or numerical values, letters, symbols, and designs.

[0056] The side glue margin 20 (a predetermined location on the box blank 11h) of the fourth box blank 11h shown in (d) of Figure 3 is printed with a fourth numerical value 25d (fourth identifier) ​​(an identifier corresponding to the printed image 13 printed on the printing surface 12 of the fourth box blank 11h) that indicates (represents) the printed image 13 (pattern) (offset printing pattern, flexographic printing pattern, gravure printing pattern, etc.) printed on the printing surface 12 (surface) of the front plate 14 of the fourth box blank 11h (identifier printing means).

[0057] The fourth numerical value 25d (fourth identifier) ​​is printed on the side margin 20 of the fourth box blank 11h when the printed image 13 (design) is printed by offset printing, flexographic printing, gravure printing, or the like. The fourth numerical value 25d (fourth identifier) ​​indicating (representing) the printed image 13 (design) of the fourth box blank 11h may be printed on any of the side margin 20, the top margin 21, the bottom margin 22, or the first to fourth flaps 23a to 23d of the fourth box blank 11h. There is no limitation on the number of digits of the fourth numerical value 25d, and it may be arbitrarily selected and arranged randomly.

[0058] The fourth box blanks 11d and 11h may have a unique fourth identifier printed thereon in addition to the fourth barcode 24d (fourth identifier) ​​printed thereon in Fig. 2(d) and the fourth numerical value 25d (fourth identifier) ​​printed thereon in Fig. 3(d). The unique fourth identifier may be any (random) combination of at least two of letters, symbols, designs, or numerical values, letters, symbols, and designs.

[0059] Furthermore, when different first to nth printed images 13 are printed on the printing surfaces 12 (front surfaces) of the first to nth box blanks 11, first to nth numerical values ​​(first to nth identifiers) indicating (representing) the first to nth printed images 13 or unique first to nth identifiers are printed on any of the side adhesive margins 20, top adhesive margins 21, bottom adhesive margins 22, or first to fourth flaps 23a to 23d of the first to nth box blanks 11 (identifier printing means).

[0060] An example of a blank inspection machine 10 used in a blank inspection system includes a paper feed unit 26, an identifier reading unit 27, an inspection unit 28, a transport unit 29, a counter stacker 30, a defective product discharge unit 31, and a controller 32. In the blank inspection machine 10, the components are arranged in the following order from upstream to downstream: paper feed unit 26 → identifier reading unit 27 → inspection unit 28 → transport unit 29 → defective product discharge unit 31 → counter stacker 30. The blank inspection machine 10 is controlled by the controller 32. Although not shown, a sack machine is connected to the blank inspection machine 10.

[0061] The controller 32 is a physical computer equipped with a central processing unit (CPU or MPU) and memory (main memory and cache memory), and has a built-in large-capacity hard disk. A touch panel 33 or a display 33 (including a keyboard) is connected to the controller 32. The controller 32 may be constructed in the cloud (cloud computing) and may be a virtual server having a virtual CPU or virtual MPU (central processing unit), virtual main memory, and virtual cache memory (memory) and running on an independent operating system (virtual OS). Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS) can be used as the cloud.

[0062] A first master image (digital data of the first master image) corresponding to the printed image 13 (various different printed images 13) printed on the printing surface 12 of the front plate 14 of the first box blank 11a, 11e is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (master image storage means). A first barcode 24a (first identifier) ​​indicating (representing) the first master image (first barcode 24a (first identifier) ​​corresponding to the first master image) is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The first master image and the first barcode 24a (first identifier) ​​are stored in the mass storage area (mass storage virtual area) of the controller in an associated state.

[0063] Furthermore, when a printed image 13 (design) is printed on the printing surface 12 (surface) of the front plate 14 and the printing surface 12 (surface) of the back plate 15 of the first box blanks 11a, 11e, a first master image (digital data of the first master image) corresponding to the printed image 13 (design) printed on the front plate 14 and the back plate 15 of the first box blanks 11a, 11e is stored (contained) in the large-capacity memory area (large-capacity virtual memory area) of the controller 32 (master image storage means).

[0064] If the first identifier is a first numerical value 25a, the first numerical value 25a indicating (representing) the first master image (first numerical value 25a (first identifier) ​​corresponding to the first master image) is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The first master image and the first numerical value 25a (first identifier) ​​are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state. If the identifier is a unique identifier, the unique first identifier indicating (representing) the first master image (unique first identifier corresponding to the first master image) is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The first master image and the unique first identifier are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state.

[0065] A second master image (digital data of the second master image) corresponding to the printed image 13 (various different printed images 13) printed on the printing surface 12 of the front plate 14 of the second box blanks 11b, 11f is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (master image storage means). A second barcode 24b (second identifier) ​​indicating (representing) the second master image (second barcode 24b (second identifier) ​​corresponding to the second master image) is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The second master image and the second barcode 24b (second identifier) ​​are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state.

[0066] Furthermore, if a printed image 13 (design) is printed on the printing surface 12 (surface) of the front plate 14 and the printing surface 12 (surface) of the back plate 15 of the second box blanks 11b, 11f, a second master image (digital data of the second master image) corresponding to the printed image 13 (design) printed on the front plate 14 and the back plate 15 of the second box blanks 11b, 11f is stored (contained) in the large-capacity memory area (large-capacity virtual memory area) of the controller 32 (master image storage means).

[0067] If the second identifier is the second numerical value 25b, the second numerical value 25b indicating (representing) the second master image (the second numerical value 25b (second identifier) ​​corresponding to the second master image) is stored (stored) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The second master image and the second numerical value 25b (second identifier) ​​are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state. If the identifier is a unique identifier, the unique second identifier indicating (representing) the second master image (the unique second identifier corresponding to the second master image) is stored (stored) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The second master image and the unique second identifier are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state.

[0068] A third master image (digital data of the third master image) corresponding to the printed image 13 (various different printed images 13) printed on the printing surface 12 of the front plate 14 of the third box blanks 11c, 11g is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (master image storage means). A third barcode 24c (third identifier) ​​indicating (representing) the third master image (third barcode 24c (third identifier) ​​corresponding to the third master image) is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The third master image and the third barcode 24c (third identifier) ​​are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state.

[0069] Furthermore, if a printed image 13 (design) is printed on the printing surface 12 (surface) of the front plate 14 and the printing surface 12 (surface) of the back plate 15 of the third box blanks 11c, 11g, a third master image (digital data of the third master image) corresponding to the printed image 13 (design) printed on the front plate 14 and the back plate 15 of the third box blanks 11c, 11g is stored (contained) in the large-capacity memory area (large-capacity virtual memory area) of the controller 32 (master image storage means).

[0070] If the third identifier is the third numerical value 25c, the third numerical value 25c indicating (representing) the third master image (the third numerical value 25c (third identifier) ​​corresponding to the third master image) is stored (stored) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The third master image and the third numerical value 25c (third identifier) ​​are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state. If the identifier is a unique identifier, the unique third identifier indicating (representing) the third master image (the unique third identifier corresponding to the third master image) is stored (stored) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The third master image and the unique third identifier are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state.

[0071] A fourth master image (digital data of the fourth master image) corresponding to the printed image 13 (various different printed images 13) printed on the printing surface 12 of the front plate 14 of the fourth box blanks 11d, 11h is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (master image storage means). A fourth barcode 24d (fourth identifier) ​​indicating (representing) the fourth master image (fourth barcode 24d (fourth identifier) ​​corresponding to the fourth master image) is stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The fourth master image and the fourth barcode 24d (third identifier) ​​are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state.

[0072] Furthermore, if a printed image 13 (design) is printed on the printing surface 12 (surface) of the front plate 14 and the printing surface 12 (surface) of the back plate 15 of the fourth box blanks 11d, 11h, a fourth master image (digital data of the fourth master image) corresponding to the printed image 15 (design) printed on the front plate 14 and the back plate 15 of the fourth box blanks 11d, 11h is stored (contained) in the large-capacity memory area (large-capacity virtual memory area) of the controller 32 (master image storage means).

[0073] If the fourth identifier is a fourth numerical value 25d, the fourth numerical value 25d indicating (representing) the fourth master image (the fourth numerical value 25d (fourth identifier) ​​corresponding to the fourth master image) is stored in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The fourth master image and the fourth numerical value 25d (fourth identifier) ​​are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state. If the identifier is a unique identifier, the unique fourth identifier indicating (representing) the fourth master image (the unique fourth identifier corresponding to the fourth master image) is stored in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The fourth master image and the unique fourth identifier are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state.

[0074] When different first to nth printed images 13 are printed on the printing surfaces 12 (front surfaces) of the first to nth box blanks 11, the first to nth master images (digital data of the first to nth master images) corresponding to the first to nth printed images 13 (various different first to nth printed images 13) printed on the printing surfaces 12 of the first to nth box blanks 11 are stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (master image storage means), and the first to nth barcodes (first to nth identifiers) (first to nth identifiers corresponding to the first to nth master images) indicating (representing) the first to nth master images are stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The first to n-th master images and the first to n-th barcodes (first to n-th identifiers) are stored in the mass storage area (mass storage virtual area) of the controller 32 in a state where they are associated with each other.

[0075] When the first to n-th identifiers are first to n-th numerical values, the first to n-th numerical values ​​indicating (representing) the first to n-th master images (the first to n-th numerical values ​​(the first to n-th identifiers) corresponding to the first to n-th master images) are stored in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The first to n-th master images and the first to n-th numerical values ​​(the first to n-th identifiers) are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state. When the identifiers are unique identifiers, the unique first to n-th identifiers indicating (representing) the first to n-th master images (the unique first to n-th identifiers corresponding to the first to n-th master images) are stored in the mass storage area (mass storage virtual area) of the controller 32 (identifier storage means). The first to n-th master images and the unique first to n-th identifiers are stored in the mass storage area (mass storage virtual area) of the controller 32 in an associated state.

[0076] The central processing unit of the controller 32 extracts (selects) a master image corresponding to the barcodes 24a-24d, the numeric values ​​25a-25d, or the unique identifier (master image extraction and selection means), and compares the extracted (selected) master image with the printed image 13 printed on the printing surface 12 (front surface) of the box blanks 11a-11d, 11e-11h (image comparison means). The central processing unit of the controller 32 compares the master image with the printed image 13 using the image comparison means, and then determines whether the printed image 13 printed on the printing surface 12 of the box blanks 11a-11d, 11e-11h is good or bad compared to the master image (good / bad determination means). One example of the image comparison means that compares the master image with the printed image 13 is to first inspect the surface finish (reflective process), then inspect the embossing, etc. (oblique light process), and then inspect the color, stains, etc. (vertical process).

[0077] The paper feed unit 26 (paper feed tray) accumulates the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks). The paper feed unit 26 stores a collated set of box blanks (a collection of multiple box blanks) in which the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) are collated (stacking together vertically) randomly (in no particular order). The order and number of the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) that form the collated set of box blanks (a collection of multiple box blanks 11a to 11d, 11e to 11h) are arbitrary.

[0078] For example, three third box blanks 11c, 11g are stacked directly below five first box blanks 11a, 11e, seven second box blanks 11b, 11f are stacked directly below three third box blanks 11c, 11g, and two fourth box blanks 11d, 11h are stacked directly below seven second box blanks 11b, 11f. Paper feed unit 26 (paper feed tray) feeds (supplies) the first to fourth box blanks 11a-11d, 11e-11h (first to nth box blanks) stored therein one by one to identifier reading unit 27.

[0079] The identifier reading unit 27 is installed downstream of the paper feed unit 26 in the transport direction and is connected to the paper feed unit 26. The control unit of the identifier reading unit 27 is connected to the controller 32 via an interface (signal line). The control unit of the identifier reading unit 27 receives commands from the controller 32 and controls the start / stop and reading of the identifier reading unit 27. If barcodes 24a to 24d are printed on the side glue margins 20, the identifier reading unit 27 is equipped with a barcode reader (not shown) and a transport mechanism (not shown) that sends the first to fourth box blanks 11a to 11d, 11e to 11h one by one to the inspection unit 28.

[0080] The control unit of the identifier reading unit 27 starts the identifier reading unit 27 in response to a command from the controller 32, reads the first to fourth barcodes 24a to 24d (first to nth barcodes) printed on the side margins 20 of the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) using a barcode reader (identifier reading means), and transmits the first to fourth barcodes 24a to 24d (first to nth barcodes) read by the barcode reader to the controller 32 (barcode transmission means).

[0081] When the numerical values ​​25a to 25d are printed on the side adhesive margins 20, the identifier reading unit 27 is equipped with a digital camera (not shown) and a transport mechanism (not shown) that sends the first to fourth box blanks 11a to 11d, 11e to 11h one by one to the inspection unit 28. The control unit of the identifier reading unit 27 starts the identifier reading unit 27 in response to a command from the controller 32, reads (photographs) the first to fourth numerical values ​​25a to 25d (first to nth numerical values) printed on the side adhesive margins 20 of the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) with the digital camera (identifier reading means), and transmits the first to fourth numerical values ​​25a to 25d (first to nth numerical values) read (photographed) by the digital camera to the controller 32 (numerical value transmitting means).

[0082] If unique identifiers are printed on the side glue margins 20, the identifier reading unit 27 is equipped with a digital camera and a transport mechanism that sends the first to fourth box blanks 11a to 11d, 11e to 11h one by one to the inspection unit 28. The control unit of the identifier reading unit 27 starts the identifier reading unit 27 in response to a command from the controller 32, reads (photographs) the unique first to fourth identifiers (first to nth identifiers) printed on the side glue margins 20 of the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) with the digital camera (identifier reading means), and transmits the unique first to fourth identifiers (first to nth identifiers) read (photographed) by the digital camera to the controller 32 (identifier transmitting means).

[0083] Inspection unit 28 is installed downstream of identifier reading unit 27 in the conveying direction and is connected to identifier reading unit 27. A control unit for starting and stopping inspection unit 28 and controlling reading is connected to controller 32 via an interface (signal line). Inspection unit 28 is equipped with a digital camera (not shown) and a conveying mechanism (not shown) that sends first to fourth box blanks 11a to 11d, 11e to 11h one by one to conveying unit 29. The control unit of inspection unit 28 receives commands from controller 32 and controls starting and stopping inspection unit 28 and reading. The control unit of the inspection unit 28 starts up the inspection unit 28 in response to a command from the controller 32, reads (photographs) the printed images 13 (1st to nth printed images) printed on the front plates 14 of the 1st to 4th box blanks 11a to 11d, 11e to 11h (1st to nth box blanks) using a digital camera (printed image reading means), and transmits the printed images 13 (1st to nth printed images) read (photographed) by the digital camera to the controller 32 (image transmitting means).

[0084] The transport unit 29 is installed downstream of the inspection unit 28 in the transport direction and is connected to the inspection unit 28. The control unit of the transport unit 29 is connected to the controller 32 via an interface (signal line). A conveyor (not shown) is installed in the transport unit 29. The control unit of the transport unit 29 receives commands from the controller 32 and controls starting and stopping of the transport unit 29 and sorting of the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) into a counter stacker or a defective product discharge unit. The control unit of the transport unit 29 starts the transport unit 29 in response to a command from the controller 32, and transports the inspected first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) from the inspection unit 28 toward the counter stacker 30, or transports the inspected first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) from the inspection unit 28 toward the defective product removal unit 31.

[0085] The counter stacker 30 is installed downstream of the transport unit 29 in the transport direction and is connected to the transport unit 29. A control unit of the counter stacker 30 is connected to the controller 32 via an interface (signal line). The control unit of the counter stacker 30 receives commands from the controller 32 and controls the start / stop and counting of the counter stacker 30. The counter stacker 30 stores a plurality of first to fourth box blanks 11a to 11d, 11e to 11h, on which printed images 13 determined to be good are printed, out of the inspected first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) transported by the transport unit 29. In the counter stacker 30, the plurality of first to fourth box blanks 11a to 11d, 11e to 11h on which printed images 13 determined to be good are randomly (in no particular order) collated (stacking vertically in a group).

[0086] The control unit of counter stacker 30 starts counter stacker 30 in response to a command from controller 32, counts the number (quantity) of first to fourth box blanks 11a to 11d, 11e to 11h (blanks for first to nth boxes) accumulated in stacker 30, and transmits the counted number (quantity) of first to fourth box blanks 11a to 11d, 11e to 11h (blanks for first to nth boxes) to controller 32. After the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for first to nth boxes) have been stacked up to a set number (quantity), the control unit of counter stacker 30 transfers a predetermined number of first to fourth box blanks 11a to 11d, 11e to 11h (blanks for first to nth boxes) to the next process (sack machine) in response to a command from controller 32.

[0087] A sack machine is connected downstream in the conveying direction of the counter stacker 30, and the blanks inspection system (blanks inspection machine 10) and the sack machine are linked together. Note that there are also cases where the sack machine is not connected to the counter stacker 30 (blanks inspection machine 10), and after a predetermined number of first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) have accumulated in the counter stacker 30, the counter stacker 30 is disconnected from the system (blanks inspection machine 10) and connected to the sack machine.

[0088] The defective product ejection unit 31 is installed downstream of the transport unit 29 in the transport direction and is connected to the transport unit 29. The defective product ejection unit 31 stores a plurality of first to fourth box blanks (blanks inspection machine 10) (first to nth box blanks) that have been inspected and transported by the transport unit 29, the first to fourth box blanks (blanks inspection machine 10) on which printed images 13 that have been determined to be defective are printed.

[0089] 4 is a flowchart illustrating an example of each means implemented in the blank inspection system. When the blank inspection system is switched on, the central processing unit of the controller 32 sends a start signal to the control unit of the paper feed unit 26, the control unit of the identifier reading unit 27, the control unit of the inspection unit 28, the control unit of the transport unit 29, and the control unit of the counter stacker 30. Upon receiving the start signal, the control unit of the paper feed unit 26 starts up the paper feed unit 26. Upon receiving the start signal, the control unit of the identifier reading unit 27 starts up the identifier reading unit 27. Furthermore, upon receiving the start signal, the control unit of the inspection unit 28 starts up the inspection unit 28. Furthermore, upon receiving the start signal, the control unit of the transport unit 29 starts up the transport unit 29, and the control unit of the counter stacker 30 starts up the counter stacker 30.

[0090] When the paper feed unit 26 is started, the central processing unit of the controller 32 sends a paper feed command (supply command) for the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) to the control unit of the paper feed unit 26. The control unit of the paper feed unit 26, which has received the paper feed command (supply command) from the controller 32, feeds (supplies) the plurality of first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) stored (accumulated) in the paper feed unit 26 one by one at a predetermined speed to the identifier reading unit 27.

[0091] When the identifier reading unit 27 is started, the central processing unit of the controller 32 sends an identifier reading signal to the control unit of the identifier reading unit 27. The control unit of the identifier reading unit 27, which has received the barcode (identifier) ​​identifier reading signal from the controller 32, causes the barcode reader to read the barcodes 24a to 24d (identifiers) printed on the side margins 20 of the first to fourth box blanks 11a to 11d (first to nth box blanks) fed (supplied) one by one from the paper feed unit 26 (identifier reading means) (S-1), and transmits the barcodes 24a to 24d (identifiers) read by the barcode reader to the controller 32 (barcode transmission means) (S-2). The control unit of the identifier reading unit 27 transmits the read barcodes 24a to 24d (identifiers) to the controller 32, and then sends the first to fourth box blanks 11a to 11d (first to nth box blanks) one by one to the inspection unit 28 using a conveying mechanism.

[0092] The central processing unit of the controller 32 selects (extracts) the barcodes 24a to 24d (the barcodes 24a to 24d that are the same as the transmitted barcodes 24a to 24d) that correspond to the barcodes 24a to 24d (identifiers) transmitted from the identifier reading unit 27 from the first to fourth barcodes 24a to 24d (the first to nth barcodes) stored (contained) in the large-capacity storage area (large-capacity virtual storage area), and extracts (selects) the master images (digital data of the master image) that correspond to the selected (extracted) barcodes 24a to 24d (master image extraction means) (S-3).

[0093] Alternatively, the control unit of the identifier reading unit 27, which has received an identifier reading signal of a numerical value (identifier) ​​from the controller 32, causes the digital camera to read (photograph) the numerical values ​​25a-25d (identifiers) printed on the side margins 20 of the first to fourth box blanks 11e-11h (first to nth box blanks) fed (supplied) one by one from the paper feed unit 26, and transmits the numerical values ​​25a-25d (identifiers) read (photographed) by the digital camera to the controller 32 (numerical value transmitting means). After transmitting the read numerical values ​​25a-25d (identifiers) to the controller 32, the control unit of the identifier reading unit 27 sends the first to fourth box blanks 11e-11h (first to nth box blanks) one by one to the inspection unit 28 using the transport mechanism.

[0094] The central processing unit of the controller 32 selects (extracts) the numerical values ​​25a to 25d (numerical values ​​25a to 25d identical to the transmitted numerical values ​​25a to 25d) corresponding to the numerical values ​​25a to 25d (identifiers) transmitted from the identifier reading unit 27 from the first to fourth numerical values ​​25a to 25d (1st to nth numerical values) stored (contained) in the large-capacity storage area (large-capacity virtual storage area), and extracts (selects) the master image (digital data of the master image) corresponding to the selected (extracted) numerical values ​​25a to 25d (master image extraction means) (S-3).

[0095] Alternatively, the control unit of identifier reading unit 27, which receives an identifier reading signal for the unique identifier from controller 32, causes a digital camera to read (photograph) the unique identifier printed on the side margins 20 of first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) fed (supplied) one by one from paper feed unit 26, and transmits the unique identifier read (photographed) by the digital camera to controller 32 (identifier transmitting means). After transmitting the read unique identifier to controller 32, the control unit of identifier reading unit 27 sends the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) one by one to inspection unit 28 using the transport mechanism.

[0096] The central processing unit of the controller 32 selects (extracts) a unique identifier (identical to the transmitted identifier) ​​corresponding to the unique identifier transmitted from the identifier reading unit 27 from among the unique first to fourth identifiers (unique first to nth identifiers) stored (contained) in the large-capacity storage area (large-capacity virtual storage area), and extracts (selects) a master image (digital data of the master image) corresponding to the selected (extracted) unique identifier (master image extraction means) (S-3).

[0097] When inspection unit 28 is started, the central processing unit of controller 32 sends a printed image reading signal to the control unit of inspection unit 28. The control unit of inspection unit 28, which has received the printed image reading signal for the printed image from controller 32, uses a digital camera to read (photograph) (printed image reading means) (S-4) the printed image 13 printed on the printing surface 12 (front surface) of the front panel 14 of first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) fed (supplied) one by one from identifier reading unit 27. The control unit of inspection unit 28 transmits the printed image 13 (digital data of the printed image 13) read (photographed) by the digital camera to controller 32 (printed image transmitting means) (S-5). The control unit of the inspection unit 28 sends the read printed image 13 to the controller 32, and then sends the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) one by one to the transport unit 29 using the transport mechanism.

[0098] After receiving the printed image 13 (digital data of the printed image 13) from the inspection unit 28, the central processing unit of the controller 32 compares the master image extracted (selected) by the master image extraction means (the master image corresponding to the printed image 13 printed on the printing surface 12 of each box blank 11a to 11d, 11e to 11h among the 1st to nth master images stored by the master image storage means) with the printed image 13 received from the inspection unit 28 (the printed image 13 printed on the printing surface 12 of each box blank 11a to 11d, 11e to 11h) (image comparison means) (S-6).

[0099] The central processing unit of the controller 32 compares the master image with the printed image 13 using an image comparison means, and if the printed image 13 is of approximately the same quality as the master image, it judges the printed image 13 printed on the printing surface 12 of the front plate 14 of the box blank 11a to 11d, 11e to 11h to be good (good / bad judgment means) (S-7), and if the printed image 13 is deteriorated compared to the master image, it judges the printed image 13 printed on the printing surface 12 of the front plate 14 of the box blank 11a to 11d, 11e to 11h to be bad (good / bad judgment means) (S-7).

[0100] In the blanks inspection system, the comparison speed between the printed image 13 and the master image in the image comparison means is in the range of 42,000 to 48,000 box blanks per hour. If the comparison speed is less than 42,000 box blanks per hour, for example, when the blanks inspection machine 10 is connected (directly connected) to a sack machine and the blanks inspection system (blanks inspection machine 10) and the sack machine work together, the comparison speed (comparison speed) of the blanks inspection system cannot keep up with the box assembly speed (assembly speed) of the sack machine, and the performance of the sack machine will deteriorate.

[0101] Because the blanks inspection system has a comparison speed between the printed image 13 and the master image within the above range, it can quickly compare the printed image 13 of the box blanks 11a-11d, 11e-11h on which the printed image 13 is printed with the master image, and quickly determine whether the printed image 13 is good or bad compared to the master image. Because the blanks inspection system can quickly determine whether the printed image 13 is good or bad compared to the master image, when the blanks inspection system (blanks inspection machine 10) is connected to a sack machine, it can sufficiently keep up with the box assembling speed in the sack machine, and box blanks 11a-11d, 11e-11h on which good printed images are printed can be efficiently assembled into boxes in the sack machine.

[0102] After comparing the master image with the printed image 13 using the image comparison means, the central processing unit of the controller 32 instructs the control unit of the transport unit 29 to transport the blanks for the first to fourth boxes 11a to 11d, 11e to 11h (blanks for the first to nth boxes) that are determined to be good to the counter stacker 30, and to discharge the blanks for the first to fourth boxes 11a to 11d, 11e to 11h (blanks for the first to nth boxes) that are determined to be bad to the defective product discharge unit 31. In accordance with instructions from the controller 32, the control unit of the transport unit 29 transports the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) that the controller 32 has determined to be good to the counter stacker 30 (S-8), and ejects the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) that the controller 32 has determined to be bad to the defective product ejection unit 31 (S-9).

[0103] When good first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) are transported from the transport unit 29 to the counter stacker 30, the control unit of the counter stacker 30 counts the number (quantity) of the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) transported from the transport unit 29 to the stacker 30, and transmits the counted number (quantity) of the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) to the controller 32.

[0104] After the number of first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) accumulated (transported) in counter stacker 30 reaches a set number, the central processing unit of controller 32 sends a transfer command to the control unit of counter stacker 30 to transfer the first to fourth box blanks 11a to 11d, 11e to 11h to a sack machine. The control unit of counter stacker 30 transfers the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) accumulated in stacker 30 one by one to the sack machine in accordance with the transfer command from controller 32. The sack machine assembles boxes from the first to fourth box blanks 11a to 11d, 11e to 11h (blanks for the first to nth boxes) transferred from counter stacker 30.

[0105] The blank inspection system stores first to fourth identifiers (first to fourth barcodes 24a to 24d or first to fourth numerical values ​​25a to 25d or unique first to fourth identifiers) corresponding to the first to fourth master images (first to n-th master images), and inspects the box blanks 11a to 11d, 11e to 11h by inspecting the identifiers (barcodes, numerical values, or unique identifiers) corresponding to the printed images 13 printed on the printing surfaces 12 of the box blanks 11a to 11d, 11e to 11h at predetermined locations (side margins 20, top margins 21, The identifiers printed on the predetermined positions of the box blanks 11a to 11d, 11e to 11h are read, and an identifier (barcode, numerical value, or unique identifier) ​​corresponding to the read identifier is selected from the stored first to fourth identifiers (first to nth identifiers). A master image corresponding to the selected identifier is extracted, and a master image corresponding to the selected identifier is also extracted. Since the printed image 13 printed on the printing surface 12 of each box blank 11a to 11d, 11e to 11h is compared with the printed image 13 printed on the printing surface 12 of box blank 11a to 11d, 11e to 11h, multiple master images are stored in correspondence (associated) with the identifiers, an identifier corresponding to the read identifier is selected from the stored first to fourth identifiers (first to nth identifiers), and the master image corresponding to the selected identifier is extracted. The extracted master image is compared with the printed image 13 printed on the printing surface 12 of each box blank 11a to 11d, 11e to 11h, thereby eliminating the need for master addition to register image data combining multiple master images as a master. The master image corresponding to the identifier (barcode, number, or unique identifier) ​​can be compared with the printed image 13 of box blank 11a to 11d, 11e to 11h on which the identifier is printed. This allows the printed image 13 printed on the printing surface 12 of box blank 11a to 11d, 11e to 11h to be accurately compared with the master image, making it possible to accurately determine whether the printed image 13 is good or bad compared to the master image.

[0106] The blank inspection system reads the identifiers (barcodes, numbers, or unique identifiers) of a group of box blanks (a collection of box blanks 11a to 11d, 11e to 11h) that are randomly (arbitrarily) (in no particular order) collated (gathered) in a random order. The group of box blanks 11a to 11d, 11e to 11h has a variety of different print images 13 printed on its printing surface 12. The system reads the identifiers from among the stored first to fourth identifiers (first to fourth barcodes 24a to 24d, first to fourth numbers 25a to 25d, or unique first to fourth identifiers) (first to n-th identifiers). The system selects an identifier corresponding to the identifier of the collected group of box blanks, extracts a master image corresponding to the selected identifier (barcode, numerical value, or unique identifier), and compares the master image corresponding to the extracted identifier with the printed image 13 of the box blanks 11a to 11d, 11e to 11h on which the read identifier is printed. Therefore, even if a plurality of box blanks 11a to 11d, 11e to 11h having various different printed images 13 printed on their printing surfaces 12 are randomly (arbitrarily) collated (grouped together), the box blanks 11a to 11d, 11e to 11h can be collated (grouped together) in a random manner. An identifier (a barcode, a numerical value, or a unique identifier) ​​of a box blanks collated group (a collection of box blanks) formed from 11a to 11d, 11e to 11h is read, and an identifier corresponding to the read box blanks collated group is selected from the first to fourth identifiers (the first to fourth barcodes 24a to 24d, the first to fourth numerical values ​​25a to 25d, or the unique first to fourth identifiers) (the first to nth identifiers), and a master image corresponding to the selected identifier is selected, and a box on which the master image corresponding to the selected identifier and the read identifier are printed is produced. Since the printed images 13 of the box blanks 11a to 11d, 11e to 11h are compared with the printed images 13 of the box blanks 11a to 11d, 11e to 11h, by using the identifiers, it is possible to accurately extract (select) the master images corresponding to the printed images 13 printed on the box blanks 11a to 11d, 11e to 11h, and the master images corresponding to the first to fourth identifiers (first to fourth barcodes 24a to 24d or first to fourth numeric values ​​25a to 25d or unique first to fourth identifiers) (first to nth identifiers) can be accurately extracted (selected) from the box blanks 11a to 11d, 11e to 11h on which predetermined identifiers (barcodes, numeric values, or unique identifiers) are printed.It is possible to compare the printed images 13 of the box blanks 11a to 11d, 11e to 11h with the master image, and it is also possible to accurately compare the printed images 13 printed on the printing surface 12 of each of the box blanks 11a to 11d, 11e to 11h of a box blanks collated group (a collection of box blanks 11a to 11d, 11e to 11h) in which a plurality of box blanks 11a to 11d, 11e to 11h are collated (gathered) randomly (arbitrarily).

[0107] The blank inspection system does not reduce the accuracy of comparison between the printed image 13 and the master image, and does not judge defective printed images 13 printed on box blanks 11a to 11d, 11e to 11h of a box blanks collection (a collection of box blanks 11a to 11d, 11e to 11h) in which multiple box blanks 11a to 11d, 11e to 11h are randomly (in no particular order) collated, as good, and can reliably remove (discharge) box blanks 11a to 11d, 11e to 11h on which defective printed images 13 are printed.

[0108] By connecting the blanks inspection system (blanks inspection machine 10) to a sack machine, the printed image 13 is compared with a master image before assembling the box blanks 11a to 11d, 11e to 11h into boxes, and it is possible to prevent the wasteful assembly of box blanks 11a to 11d, 11e to 11h on which defective printed images 13 are printed. The blanks inspection system can assemble into boxes only those box blanks 11a to 11d, 11e to 11h on which printed images 13 that are determined to be good compared to the master image are printed, and it is possible to prevent boxes on which defective printed images 13 are printed from being distributed on the market.

[0109] Fig. 5 is a flowchart explaining another example of each means implemented in the blank inspection system. In the blank inspection system shown in Fig. 5, first to fourth master images (first to nth master images) stored (contained) in the mass storage area (mass storage virtual area) of the controller 32 are output (displayed) on the touch panel 33 or display 33 connected to the controller 32. A predetermined master image is selected from the first to fourth master images (first to nth master images) output (displayed) on the touch panel 33 or display 33 (master image selection means) (S-10). One master image (a specific master image) or multiple master images (multiple master images) are selected. It is assumed that the first master image, the third master image, and the fourth master image are selected.

[0110] The central processing unit of the controller 32 temporarily stores the selected master image (first master image, third master image, fourth master image) in a cache memory, and extracts an identifier (first barcode 24a (first identifier) ​​or first numerical value 25a (first identifier) ​​or a unique first identifier, third barcode 24c (third identifier) ​​or third numerical value 25c (third identifier) ​​or a unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numerical value 25d (fourth identifier) ​​or a unique fourth identifier) ​​corresponding to the master image (first master image, third master image, fourth master image) selected by the master image selection means from the first to fourth identifiers (first to nth identifiers) stored by the identifier storage means (identifier extraction means) (S-11).

[0111] Next, the central processing unit of the controller 32 extracts an identifier (the first barcode 24a (first identifier) ​​or the first numeric value 25a (first identifier) ​​or the unique first identifier, the third barcode 24c (third identifier) ​​or the third numeric value 25c (third identifier) ​​or the unique third identifier, the fourth barcode 24d (fourth identifier) ​​or the fourth numeric value 25d (fourth identifier) ​​or the unique fourth identifier) ​​corresponding to the identifier extracted by the identifier extraction means (the first barcode 24a (first identifier) ​​or the first numeric value 25a (first identifier) ​​or the unique first identifier, the third barcode 24c (third identifier) ​​or the third numeric value 25c (third identifier) ​​or the unique third identifier, the fourth barcode 24d (fourth identifier) ​​or the fourth numeric value 25d (fourth identifier) ​​or the unique fourth identifier). The box blanks 11 (first box blanks 11a, 11e, third box blanks 11c, 11g, fourth box blanks 11d, 11h) printed with a unique first identifier, third barcode 24c (third identifier) ​​or third numerical value 25c (third identifier), or a unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numerical value 25d (fourth identifier), or a unique fourth identifier) ​​are selected from the box blanks 11a to 11d, 11e to 11h in the collated group of box blanks (first box blank sorting means) (S-12). The second box blanks 11b, 11f are discharged from the transport unit 29 to the defective product discharge unit 31.

[0112] The control unit of the identifier reading unit 27, which receives an identifier reading signal from the controller 32, causes a barcode reader or a digital camera to read the identifiers (first barcode 24a (first identifier) ​​or first numerical value 25a (first identifier) ​​or a unique first identifier, third barcode 24c (third identifier) ​​or third numerical value 25c (third identifier) ​​or a unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numerical value 25d (fourth identifier) ​​or a unique fourth identifier) ​​printed on the side margins 20 of the first box blanks 11a, 11e, the third box blanks 11c, 11g, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) fed (supplied) one by one from the paper feed unit 26 (identifier reading means) (S-13).

[0113] The control unit of the identifier reading unit 27 transmits the identifiers (first barcode 24a (first identifier) ​​or first numerical value 25a (first identifier) ​​or unique first identifier, third barcode 24c (third identifier) ​​or third numerical value 25c (third identifier) ​​or unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numerical value 25d (fourth identifier) ​​or unique fourth identifier) ​​read (photographed) by the barcode reader or digital camera to the controller 32 (barcode transmitting means, numerical value transmitting means, or identifier transmitting means) (S-14). After transmitting the read identifiers to the controller 32, the control unit of the identifier reading unit 27 sends the first to fourth box blanks 11a to 11d, 11e to 11h (first to n-th box blanks) one by one to the inspection unit 28 using the conveying mechanism.

[0114] The central processing unit of the controller 32 extracts (selects) (master image extraction means) (S-15) a master image (first master image (digital data of the first master image), third master image (digital data of the third master image), fourth master image (digital data of the fourth master image)) corresponding to the identifier extracted by the identifier extraction means (first barcode 24a (first identifier) ​​or first numerical value 25a (first identifier) ​​or unique first identifier, third barcode 24c (third identifier) ​​or third numerical value 25c (third identifier) ​​or unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numerical value 25d (fourth identifier) ​​or unique fourth identifier).

[0115] In other words, the master image extraction means extracts an identifier (first barcode 24a (first identifier) ​​or first numeric value 25a (first identifier) ​​or unique first identifier, third barcode 24c (third identifier) ​​or third numeric value 25c (third identifier) ​​or unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numeric value 25d (fourth identifier) ​​or unique fourth identifier) ​​transmitted from the identifier reading unit 27 from among the first to fourth identifiers (first to n-th identifiers) stored in the large-capacity virtual storage area. The image processing unit 100 selects (extracts) an identifier (first barcode 24a (first identifier) ​​or first numeric value 25a (first identifier) ​​or a unique first identifier, third barcode 24c (third identifier) ​​or third numeric value 25c (third identifier) ​​or a unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numeric value 25d (fourth identifier) ​​or a unique fourth identifier) ​​corresponding to the selected (extracted) identifier, and extracts (selects) a master image (first master image, third master image, fourth master image) corresponding to the selected (extracted) identifier.

[0116] Next, the central processing unit of controller 32 sends a printed image reading signal to the control unit of inspection unit 28. The control unit of inspection unit 28, which has received the printed image reading signal for printed image 13 from controller 32, uses a digital camera to read (photograph) (printed image reading means) (S-16) the printed image 13 printed on the printing surface 12 (front surface) of the front panel 14 of first box blanks 11a and 11e, third box blanks 11c and 11g, and fourth box blanks 11d and 11h (first to nth box blanks) fed (supplied) one by one from identifier reading unit 27. The control unit of inspection unit 28 then sends the printed image 13 (digital data of the printed image 13) read (photographed) by the digital camera to controller 32 (printed image sending means) (S-17). The control unit of the inspection unit 27 sends the read printed image 13 to the controller 32, and then sends the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) one by one to the transport unit 29 using the transport mechanism.

[0117] The central processing unit of the controller 32 receives the printed images 13 (digital data of the printed images 13) of the first box blanks 11a and 11e, the printed images 13 (digital data of the printed images 13) of the third box blanks 11c and 11g, and the printed images 13 (digital data of the printed images 13) of the fourth box blanks 11d and 11h from the inspection unit 28, and then extracts (selects) the first master image, the third master image, and the fourth master image (corresponding to the printed images 13 printed on the printing surfaces 12 of the first box blanks 11a and 11e, the third box blanks 11c and 11g, and the fourth box blanks 11d and 11h among the first to n-th master images stored by the master image storage means) extracted (selected) by the master image extraction means. The printed images 13 (printed images 13 printed on the printing surfaces 12 of the first box blanks 11a and 11e, printed images 13 printed on the printing surfaces 12 of the third box blanks 11c and 11g, and printed images 13 printed on the printing surfaces 12 of the fourth box blanks 11d and 11h) corresponding to the identifiers (first barcode 24a (first identifier) ​​or first numeric value 25a (first identifier) ​​or a unique first identifier, third barcode 24c (third identifier) ​​or third numeric value 25c (third identifier) ​​or a unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numeric value 25d (fourth identifier) ​​or a unique fourth identifier) ​​received from the inspection unit 28 are compared (image comparison means) (S-18). The comparison speed of the printed images 13 and the master images in the image comparison means of the blanks inspection system shown in FIG. 5 is in the range of 42,000 to 48,000 box blanks per hour.

[0118] The central processing unit of the controller 32 compares the master images (first master image, third master image, fourth master image) with the printed images 13 (printed images 13 of the first box blanks 11a and 11e, printed images 13 of the third box blanks 11c and 11g, printed images 13 of the fourth box blanks 11d and 11h) using the image comparison means. If the quality of the printed images 13 is approximately the same as that of the master images, the central processing unit determines that the printed images 13 printed on the printing surfaces 12 of the front plates 14 of the box blanks 11a, 11e, 11c, 11g, 11d, and 11h are good (good / bad judgment means) (S-19). If the printed images are deteriorated compared to the master images, the central processing unit of the controller 32 determines that the printed images 13 printed on the printing surfaces 12 of the front plates 14 of the box blanks 11a, 11e, 11c, 11g, 11d, and 11h are bad (good / bad judgment means) (S-19).

[0119] After comparing the master image with the printed image 13 using the image comparison means, the central processing unit of the controller 32 instructs the control unit of the transport unit 29 to transport the first box blanks 11a, 11e, the third box blanks 11c, 11g, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) whose printed images 13 are determined to be good to the counter stacker 30, and to discharge the first box blanks 11a, 11e, the third box blanks 11c, 11g, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) whose printed images 13 are determined to be bad to the defective product discharge unit 31.

[0120] In accordance with instructions from the controller 32, the control unit of the transport unit 29 transports the first box blanks 11a, 11e, the third box blanks 11c, 11g, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) that the controller has determined to be good to the counter stacker 30 (S-19), and ejects the first box blanks 11a, 11e, the third box blanks 11c, 11g, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) that the controller has determined to be bad to the defective product ejection unit 31 (S-20).

[0121] The blank inspection system shown in Fig. 5 has the following effect in addition to the effect of the blank inspection system shown in Fig. 4. The blank inspection system of Fig. 5 selects a first master image, a third master image, a fourth master image (plurality of master images) or a specific master image from the first to n-th master images, and thereby produces a first box on which an identifier (first barcode 24a (first identifier) ​​or first numerical value 25a (first identifier) ​​or a unique first identifier, third barcode 24c (third identifier) ​​or third numerical value 25c (third identifier) ​​or a unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numerical value 25d (fourth identifier) ​​or a unique fourth identifier) ​​corresponding to the selected master image is printed. Since the first box blanks 11a, 11e, the third box blanks 11c, 11g, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) are selected from the box blanks 11a to 11d, 11e to 11h of the box blanks collated group (a collection of box blanks 11a to 11d, 11e to 11h), it is possible to extract only the first box blanks 11a, 11e, the third box blanks 11c, 11g, and the fourth box blanks 11d, 11h on which the same printed image 13 as the selected master image is printed, and it is possible to produce only boxes on which the same printed image 13 as the selected master image is printed.

[0122] The blank inspection system of FIG. 5 inspects the selected first box blanks 11a, 11e, and 11f by inspecting the master images (first master image, third master image, fourth master image) corresponding to the extracted identifiers (first barcode 24a (first identifier) ​​or first numeric value 25a (first identifier) ​​or unique first identifier, third barcode 24c (third identifier) ​​or third numeric value 25c (third identifier) ​​or unique third identifier, fourth barcode 24d (fourth identifier) ​​or fourth numeric value 25d (fourth identifier) ​​or unique fourth identifier). The extracted identifier can be compared with the printed image 13 printed on the printing surface 12 of the box blanks 11c, 11g and the fourth box blanks 11d, 11h (blanks for the first to nth boxes), and the printed image 13 printed on the printing surface 12 of the first box blanks 11a, 11e, the third box blanks 11c, 11g and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) on which an identifier corresponding to the extracted identifier is printed can be accurately compared with the master image, making it possible to accurately determine whether the printed image 13 is good or bad compared to the master image.

[0123] Fig. 6 is a flowchart explaining another example of each means implemented in the blank inspection system. In the blank inspection system shown in Fig. 6, first to fourth identifiers (first to nth identifiers) corresponding to first to fourth master images (first to nth master images) stored (contained) in a large-capacity storage area (large-capacity virtual storage area) of the controller 32, and an identifier input area are output (displayed) on the touch panel 33 or display 33 connected to the controller 32. As the first to fourth identifiers, first to fourth barcodes 24a to 24d, first to fourth numeric values ​​25a to 25d, or unique first to fourth identifiers are output (displayed).

[0124] A plurality of master images or a specific master image is selected from the first to nth master images, and a predetermined identifier corresponding to the selected master image is selected (highlighted) from the first to fourth identifiers (first to nth identifiers) output (displayed) on the touch panel 33 or the display 33, or an identifier corresponding to the selected master image from the first to fourth identifiers (first to nth identifiers) is input into the identifier input area (identifier input means) (S-30). The identifiers to be input (selected) may be one (a specific identifier) ​​or multiple (multiple identifiers). It is assumed that the first identifier (first barcode 24a or first numeric value 25a or unique first identifier), the second identifier (second barcode 24b or second numeric value 25b or unique second identifier), and the fourth identifier (fourth barcode 24d or fourth numeric value 25d or unique fourth identifier) ​​are input (selected).

[0125] The central processing unit of the controller 32 temporarily stores the input (selected) identifier (first identifier, second identifier, fourth identifier) ​​in a cache memory, and stores the identifier (first barcode 24a or first numeric value 25a or unique first identifier) ​​input by the identifier input means, the identifier (second barcode 24b or second numeric value 25b or unique second identifier), the identifier (fourth barcode 24d or fourth numeric value 25d or unique fourth identifier) ​​corresponding to the identifier (first barcode 24a or first numeric value 25a The first box blanks 11a, 11e, the second box blanks 11b, 11f, and the fourth box blanks 11d, 11h (the first to nth box blanks) printed with the first identifier (second barcode 24b or second numeric value 25b or unique second identifier), the second identifier (second barcode 24b or second numeric value 25b or unique second identifier), and the fourth identifier (fourth barcode 24d or fourth numeric value 25d or unique fourth identifier) ​​are selected from the box blanks 11a to 11d, 11e to 11h in the collated group of box blanks (second box blank selection means) (S-31). The third box blanks 11c, 11g are discharged from the transport unit 29 to the defective product discharge unit 31.

[0126] The control unit of the identifier reading unit 27, which receives an identifier reading signal from the controller 32, causes a barcode reader or a digital camera to read the identifier (first barcode 24a or first numerical value 25a or unique first identifier), the second identifier (second barcode 24b or second numerical value 25b or unique second identifier), and the fourth identifier (fourth barcode 24d or fourth numerical value 25d or unique fourth identifier) ​​printed on the side margins 20 of the first box blanks 11a, 11e, the second box blanks 11b, 11f, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) fed (supplied) one by one from the paper feed unit 26 (identifier reading means) (S-32).

[0127] The control unit of the identifier reading unit 27 transmits the identifier (first barcode 24a or first numerical value 25a or unique first identifier), the second identifier (second barcode 24b or second numerical value 25b or unique second identifier), and the fourth identifier (fourth barcode 24d or fourth numerical value 25d or unique fourth identifier) ​​read (photographed) by the barcode reader or digital camera to the controller 32 (barcode transmitting means, numerical value transmitting means, or identifier transmitting means) (S-33). After transmitting the read identifiers to the controller 32, the control unit of the identifier reading unit 27 sends the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) one by one to the inspection unit 28 using the transport mechanism.

[0128] The central processing unit of the controller 32 extracts (selects) the master images (first master image (digital data of the first master image), second master image (digital data of the second master image), fourth master image (digital data of the fourth master image)) corresponding to the identifier (first barcode 24a or first numerical value 25a or unique first identifier), second identifier (second barcode 24b or second numerical value 25b or unique second identifier), fourth identifier (fourth barcode 24d or fourth numerical value 25d or unique fourth identifier) ​​input (selected) by the identifier input means (master image extraction means) (S-34).

[0129] In other words, the master image extraction means extracts master images (first master image (digital data of the first master image), second master image (digital data of the second master image), fourth master image (digital data of the fourth master image)) corresponding to the identifier (first barcode 24a or first numerical value 25a or unique first identifier), the second identifier (second barcode 24b or second numerical value 25b or unique second identifier), and the fourth identifier (fourth barcode 24d or fourth numerical value 25d or unique fourth identifier) ​​transmitted from the identifier reading unit 27 from among the first to fourth identifiers (first to n-th identifiers) stored in the large-capacity storage area (large-capacity virtual storage area). The image processing unit 100 selects (extracts) master images (first master image (digital data of the first master image), second master image (digital data of the second master image), fourth master image (digital data of the fourth master image)) corresponding to the identifier (first barcode 24a or first numeric value 25a or unique first identifier), second identifier (second barcode 24b or second numeric value 25b or unique second identifier), fourth identifier (fourth barcode 24d or fourth numeric value 25d or unique fourth identifier) ​​corresponding to the selected (extracted) identifier, and extracts (selects) master images (first master image, second master image, fourth master image) corresponding to the selected (extracted) identifier.

[0130] Next, the central processing unit of controller 32 sends a printed image reading signal to the control unit of inspection unit 28. The control unit of inspection unit 28, which has received the printed image reading signal for printed image 13 from controller 32, uses a digital camera to read (photograph) (printed image reading means) (S-35) the printed image 13 printed on the printing surface 12 (front surface) of the front panel 14 of first box blanks 11a and 11e, second box blanks 11b and 11f, and fourth box blanks 11d and 11h (first to nth box blanks) fed (supplied) one by one from identifier reading unit 28. The control unit of inspection unit 28 then sends the read printed image 13 (digital data of printed image 13) to controller 32 (printed image sending means) (S-36). The control unit of the inspection unit 28 sends the read printed image 13 to the controller 32, and then sends the first to fourth box blanks 11a to 11d, 11e to 11h (first to nth box blanks) one by one to the transport unit 29 using the transport mechanism.

[0131] The central processing unit of the controller 32 receives the printed images 13 (digital data of the printed images 13) of the first box blanks 11a and 11e, the printed images 13 (digital data of the printed images 13) of the second box blanks 11b and 11f, and the printed images 13 (digital data of the printed images 13) of the fourth box blanks 11d and 11h from the inspection unit 28, and then stores the first master image, the second master image, and the fourth master image (printed on the printing surfaces 12 of the first box blanks 11a and 11e, the second box blanks 11b and 11f, and the fourth box blanks 11d and 11h among the first to n-th master images stored in the master image storage means) extracted (selected) by the master image extraction means. The inspection unit 28 compares (image comparing means) (S-37) the printed images 13 (printed images 13 printed on the printing surfaces 12 of the first box blanks 11a and 11e, printed images 13 printed on the printing surfaces 12 of the second box blanks 11b and 11f, and printed images 13 printed on the printing surfaces 12 of the fourth box blanks 11d and 11h) corresponding to the identifier (first barcode 24a or first numeric value 25a or unique first identifier), the second identifier (second barcode 24b or second numeric value 25b or unique second identifier), and the fourth identifier (fourth barcode 24d or fourth numeric value 25d or unique fourth identifier) ​​received from the inspection unit 28. The speed at which the image comparing means of the blanks inspection system shown in FIG. 6 compares the printed images with the master images is in the range of 42,000 to 48,000 box blanks per hour.

[0132] The central processing unit of the controller 32 compares the master images (first master image, second master image, fourth master image) with the printed images 13 (printed images 13 of the first box blanks 11a and 11e, printed images 13 of the second box blanks 11b and 11f, printed images 13 of the fourth box blanks 11d and 11h) using the image comparison means. If the quality of the printed images 13 is substantially the same as that of the master images, the central processing unit determines that the printed images 13 printed on the printing surfaces 12 of the front plates 14 of the box blanks 11a, 11e, 11b, 11f, 11d, and 11h are good (good / bad judgment means) (S-38). If the printed images 13 are deteriorated compared to the master images, the central processing unit of the controller 32 determines that the printed images 13 printed on the printing surfaces 12 of the front plates 14 of the box blanks 11a, 11e, 11b, 11f, 11d, and 11h are bad (good / bad judgment means) (S-38).

[0133] After comparing the master image with the printed image using the image comparison means, the central processing unit of the controller 32 instructs the control unit of the transport unit 29 to transport the first box blanks 11a, 11e, the second box blanks 11b, 11f, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) that are determined to be good to the counter stacker 30, and to discharge the first box blanks 11a, 11e, the second box blanks 11b, 11f, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) that are determined to be bad to the defective product discharge unit 31. In accordance with instructions from the controller 32, the control unit of the transport unit 29 transports the first box blanks 11a, 11e, the second box blanks 11b, 11f, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) that the controller 32 has determined to be good to the counter stacker 30 (S-39), and ejects the first box blanks 11a, 11e, the second box blanks 11b, 11f, and the fourth box blanks 11d, 11h (blanks for the first to nth boxes) that the controller 32 has determined to be bad to the defective product ejection unit 31 (S-40).

[0134] The blank inspection system shown in Fig. 6 has the following effect in addition to the effect of the blank inspection system shown in Fig. 4. When a first master image, a second master image, a fourth master image (plurality of master images) or a specific master image is selected from the first to n-th master images, the blank inspection system of Fig. 6 inputs an identifier (first barcode 24a or first numerical value 25a or a unique first identifier), a second identifier (second barcode 24b or second numerical value 25b or a unique second identifier) ​​and a fourth identifier (fourth barcode 24d or fourth numerical value 25d or a unique fourth identifier) ​​corresponding to the selected master image, thereby detecting an identifier (first barcode 24a or first numerical value 25a or a unique first identifier), a second identifier (second barcode 24b or second numerical value 25b or a unique fourth identifier) ​​and a fourth identifier (fourth barcode 24d or fourth numerical value 25d or a unique fourth identifier) ​​corresponding to the input identifier. The first box blanks 11a, 11e, the second box blanks 11b, 11f, and the fourth box blanks 11d, 11h (the first to nth box blanks) on which the first identifier (a fourth barcode 24d or a fourth numeric value 25d or a unique fourth identifier) ​​and the fourth identifier (a fourth barcode 24d or a fourth numeric value 25d or a unique fourth identifier) ​​are printed are selected from the box blanks 11a to 11d and 11e to 11h of the box blanks collated group (a collection of box blanks 11a to 11d and 11e to 11h), so that only the box blanks 11a, 11e, 11b, 11f, 11d, and 11h on which the same printed image 13 as the master image corresponding to the input identifier is printed can be extracted, and only boxes on which the same printed image 13 as the master image corresponding to the input identifier is printed can be produced.

[0135] The blank inspection system of FIG. 6 generates master images (first master image, second master image, fourth master image) corresponding to the input identifier (first barcode 24a or first numeric value 25a or unique first identifier), second identifier (second barcode 24b or second numeric value 25b or unique second identifier), and fourth identifier (fourth barcode 24d or fourth numeric value 25d or unique fourth identifier), and sorted first box blanks 11a, 11e, second box blanks 11b, 11f, The printed image 13 printed on the printing surface 12 of the blanks 11d and 11h for the fourth box (blanks for the first to nth boxes) can be compared with the master image, and the printed image 13 printed on the printing surface 12 of the blanks 11a and 11e for the first box, blanks 11b and 11f for the second box, and blanks 11d and 11h for the fourth box (blanks for the first to nth boxes) on which an identifier corresponding to the input identifier is printed can be accurately compared with the master image, making it possible to accurately determine whether the printed image 13 is good or bad compared to the master image. [Explanation of symbols]

[0136] 10 Blanks inspection machine 11 Box blanks 11a Blank for first box 11b Blank for second box 11c Blank for Box 3 11d Blank for Box 4 11e Blank for 1st box 11f Blank for 2nd box 11g Blank for 3rd box 11h Blank for 4th box 12 Printing surface 13 Printed images 14 Front Plate 15 Back Plate 16 First side plate 17 Second side plate 18 Top Plate 19 Bottom plate 20 Side glue margin 21 Top surface adhesive 22 Bottom adhesive margin 23a~23d 1st~4th flaps 24a First barcode (first identifier) 24b Secondary barcode (secondary identifier) 24c 3rd barcode (3rd identifier) 24d 4th barcode (4th identifier) 25a First Numerical Value (First Identifier) 25b Second number (second identifier) 25c Third number (third identifier) 25d Fourth number (fourth identifier) 26 Paper feed unit 27 Identifier reading unit 28 Inspection Unit 29 Transport unit 30 Counter Stacker 31 Defective product ejection unit 32 Controller 33 Touch panel or display

Claims

1. A blanks inspection system comprising: a master image storage means for storing a plurality of first to nth master images corresponding to various different printed images printed on the printing surfaces of a plurality of blanked box blanks; an image comparison means for comparing a master image corresponding to a printed image printed on the printing surface of each box blank among the first to nth master images stored by the master image storage means with the printed image printed on the printing surface of each box blank; and a pass / fail judgment means for judging whether the printed image printed on the printing surface of each box blank is pass or fail compared to the master image as a result of comparing the master image with the printed image by the image comparison means, The blanks inspection system includes an identifier storage means for storing first to nth identifiers corresponding to the first to nth master images, an identifier printing means for printing identifiers corresponding to each image printed on the printing surface of the plurality of box blanks at predetermined positions on the box blanks, an identifier reading means for reading the identifiers printed at predetermined positions on the box blanks in a collated group of box blanks obtained by randomly collating a plurality of box blanks having various different printed images printed on the printing surface of the plurality of box blanks, and a master image extraction means for selecting an identifier corresponding to the identifier of the collated group of box blanks read by the identifier reading means from the first to nth identifiers stored by the identifier storage means, and extracting a master image corresponding to the selected identifier, A blank inspection system characterized in that the image comparison means compares the master image extracted by the master image extraction means and corresponding to the selected identifier with a printed image of a box blank on which the read identifier is printed.

2. The blanks inspection system of claim 1, further comprising: a master image selection means for selecting a plurality of master images or a specific master image from the first to nth master images; an identifier extraction means for extracting an identifier corresponding to the master image selected by the master image selection means from the first to nth identifiers stored by the identifier storage means; and a first box blank sorting means for sorting box blanks printed with an identifier corresponding to the identifier extracted by the identifier extraction means from among the box blanks in the group of collated box blanks.

3. 3. The blank inspection system of claim 2, wherein the master image extraction means extracts a master image corresponding to the identifier extracted by the identifier extraction means, and the image comparison means compares the master image corresponding to the identifier extracted by the identifier extraction means with a printed image printed on the printing surface of a box blank selected by the first box blank selection means.

4. The blank inspection system of claim 1, further comprising: an identifier input means for inputting an identifier corresponding to each selected master image or an identifier corresponding to the selected specific master image when multiple master images or a specific master image are selected from the first to nth master images; and a second box blank sorting means for sorting box blanks printed with an identifier corresponding to the identifier input by the identifier input means from among the box blanks in the collated group of box blanks.

5. 5. A blank inspection system as described in claim 4, wherein the master image extraction means extracts a master image corresponding to the identifier input by the identifier input means, and the image comparison means compares the master image corresponding to the identifier input by the identifier input means with a printed image printed on the printing surface of a box blank selected by the second box blank selection means.

6. 6. A blanks inspection system according to claim 1, wherein the identifier is printed on the same surface as the printing surface of a glue tab or a flap of the box blank.

7. 7. The blank inspection system according to claim 1, wherein the identifier is a bar code or a numeric value.

8. A blank inspection system as described in any one of claims 1 to 7, wherein the blank inspection system is connected to a sack machine that assembles boxes from box blanks having printed images printed on the printing surfaces, and in the sack machine, before assembling the box from the box blanks, the blank inspection system compares the printed image printed on the printing surface of the box blank with the master image.

9. 9. A blank inspection system according to claim 1, wherein the speed at which the image comparison means compares the printed image with the master image is in the range of 42,000 to 48,000 box blanks per hour.

Images