JP7365882B2 - Corrugated sheet defect detection device, corrugated sheet defect removal device, and corrugated sheet manufacturing device - Google Patents

Description

The present disclosure relates to a corrugated sheet defect detection device that detects defects in a corrugated cardboard sheet in which a front liner, a corrugated core, and a back liner are bonded together, a corrugated sheet defect removal device that includes the corrugated sheet defect detection device, and a corrugated cardboard The present invention relates to a corrugated board sheet manufacturing apparatus that includes a sheet defect removal device.

A corrugate machine as a corrugated sheet manufacturing device includes a single facer and a double facer. Single facers are made by processing core paper into a corrugated shape and laminating a back liner to form a single-sided corrugated sheet. Double facers are made by bonding a front liner to a single-sided corrugated sheet to form a double-sided corrugated sheet. A continuous double-sided corrugated cardboard sheet produced by the double facer is cut to a predetermined width by a slitter scorer, and then cut to a predetermined length by a cut-off device to produce a corrugated cardboard sheet.

When using a single facer to bond the corrugated core to the back liner to form a single-sided corrugated sheet, if the corrugation of the core deforms, it may result in poor adhesion when bonding the back liner or front liner to the corrugated core. Such defective parts occur. Therefore, by detecting the deformation of the core in a single-sided corrugated sheet, a defective corrugated sheet can be detected. An example of such a corrugated board sheet defect detection device is one described in Patent Document 1 listed below.

JP 2017-133998 Publication

The above-mentioned corrugated sheet defect detection device irradiates light toward the core of a single-sided corrugated sheet, determines the quality of the core based on the image taken by the irradiation section, and when it is determined that the core is defective, On the downstream side, double-sided corrugated cardboard sheets containing defective parts are discharged from the conveyance line. By the way, when a core failure occurs, there is a desire to identify the cause and analyze the identified cause.

The present disclosure is intended to solve the above-mentioned problems, and provides a corrugated sheet defect detection device, a corrugated sheet defect removal device, and a corrugated sheet manufacturing device that enable analysis of the causes of core defects. With the goal.

To achieve the above object, the corrugated sheet defect detection device of the present disclosure includes a defect detection unit that detects a defective part of the corrugation of a single-sided corrugated sheet, which is composed of a corrugated core and a liner bonded to the core. , an association unit that associates the detected defective portion with manufacturing operation information of the corrugated board sheet when the defective detection unit detects the defective portion.

Further, the corrugated sheet defect removing device of the present disclosure includes the corrugated sheet defect detecting device and a discharge device for discharging the double-sided corrugated sheet cut into a predetermined length including the defective portion detected by the corrugated sheet defect detecting device. A device.

Further, the corrugated sheet manufacturing apparatus of the present disclosure includes a single facer for manufacturing a single-sided corrugated sheet by bonding a second liner to a corrugated core; The present invention includes a double facer for producing a double-sided corrugated paperboard sheet by laminating two faces together, and a defect removal device for the corrugated paperboard sheet.

According to the corrugated paperboard sheet defect detection apparatus, corrugated paperboard sheet defect removal apparatus, and corrugated paperboard sheet manufacturing apparatus of the present disclosure, it is possible to analyze the cause of core defects.

FIG. 1 is a schematic diagram showing a corrugate machine as a corrugated sheet manufacturing apparatus. FIG. 2 is a schematic configuration diagram showing a single facer. FIG. 3 is a schematic diagram showing the installed state of the corrugated paperboard sheet defect detection device. FIG. 4 is a schematic configuration diagram showing a defect detection device for corrugated paperboard sheets. FIG. 5 is a schematic diagram showing the arrangement of an irradiation device and an imaging device for a single-sided corrugated sheet. FIG. 6 is a flowchart showing a defect detection method. FIG. 7 is a flowchart showing data processing when a defect is detected. FIG. 8 is a schematic diagram showing a display screen on the display device. FIG. 9 is a schematic diagram showing the first display screen after operation on the display device. FIG. 10 is a schematic diagram showing the second display screen after the operation on the display device. FIG. 11 is a schematic diagram showing a modification of the display screen of the display device.

Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. Note that the present disclosure is not limited to this embodiment, and if there are multiple embodiments, the present disclosure also includes a configuration in which each embodiment is combined. In addition, the components in the embodiments include those that can be easily imagined by those skilled in the art, those that are substantially the same, and those that are in the so-called equivalent range.

[Corrugate machine]
FIG. 1 is a schematic diagram showing a corrugate machine as a corrugated sheet manufacturing apparatus. In the following explanation, the front-rear direction in the conveyance direction of the corrugated cardboard sheet is the X direction, the horizontal direction orthogonal to the front-rear direction (X direction) in the conveyance direction of the corrugated cardboard sheet is the Y direction (the width direction of the corrugated cardboard sheet), and the In the description, a vertical direction (thickness direction of the corrugated cardboard sheet) perpendicular to the front-rear direction (X direction) in the conveyance direction is referred to as the Z direction.

As shown in FIG. 1, a corrugate machine 10 as a corrugated sheet manufacturing device first manufactures a single-sided corrugated sheet D1 by bonding a back liner (second liner) C1 to a corrugated core B1, and A back liner (second liner) C2 is bonded to the corrugated core B2 to produce a single-sided corrugated board sheet D2. Next, the back liner C2 of the single-sided corrugated sheet D2 is laminated to the center core B1 of the manufactured single-sided corrugated sheet D1, and the front liner (first liner) A is laminated to the center core B2 of the single-sided corrugated sheet D2 so as to be continuous. A double-sided corrugated cardboard sheet E is produced. Then, by cutting the continuous double-sided corrugated cardboard sheet E into a predetermined length, a plate-shaped double-sided corrugated cardboard sheet F is manufactured.

The corrugating machine 10 includes a mill roll stand 11 for the center core B1, a mill roll stand 12 for the back liner C1, a single facer 13, a bridge 14, a mill roll stand 15 for the center core B2, and a mill roll stand for the back liner C2. Roll stand 16, single facer 17, bridge 18, mill roll stand 19 for front liner A, preheater 20, glue machine 21, double facer 22, rotary shear 23, slitter scorer 24, cutoff 25, a defective product discharge device 26, and a stacker 27.

The mill roll stands 11 and 15 are equipped with roll papers in which cores B1 and B2 are wound into rolls, respectively, on both sides in the X direction, and a splicer for splicing paper is provided between each roll paper. While paper is being fed from one roll, the other roll is loaded and prepared for splicing, and when one roll is running low, the splicer splices the other roll onto one roll. be done. Therefore, the cores B1 and B2 are continuously fed from each mill roll stand 11 and 15 toward the downstream side.

The mill roll stands 12 and 16 are equipped with roll paper in which back liners C1 and C2 are wound into rolls on both sides in the X direction, respectively, and a splicer for splicing paper is provided between each roll paper. While paper is being fed from one roll, the other roll is loaded and prepared for splicing, and when one roll is running low, the splicer splices the other roll onto one roll. be done. Therefore, the back liners C1 and C2 are continuously fed downstream from each mill roll stand 12 and 16.

The cores B1, B2 let out from the mill roll stands 11, 15 and the back liners C1, C2 let out from the mill roll stands 12, 16 are preheated by preheaters (not shown), respectively. Each preheater has a heating roll into which steam is supplied, and the cores B1, B2 and back liners C1, C2 are wound around the heating roll and conveyed to raise the temperature to a predetermined temperature.

The single facer 13 is formed by processing the heated core B1 into a wavy shape, gluing it to the top of each step, and bonding the heated back liner C1 to form a single-sided corrugated board sheet D1. The single facer 13 is provided with a pick-up conveyor obliquely above the downstream side in the transport direction (X direction), and transports the single-sided corrugated cardboard sheet D1 formed by the single facer 13 to the bridge 14. The bridge 14 temporarily retains the single-sided corrugated cardboard sheet D1 in order to absorb the speed difference between the single facer 13 and the double facer 22.

The single facer 17 is formed by processing the heated core B2 into a wavy shape, gluing it to the top of each step, and bonding the heated back liner C2 to form a single-sided corrugated board sheet D2. The single facer 17 is provided with a pick-up conveyor obliquely above the downstream side in the transport direction (X direction), and transports the single-sided corrugated cardboard sheet D2 formed by the single facer 17 to the bridge 18. The bridge 18 temporarily retains the single-sided corrugated cardboard sheet D2 in order to absorb the speed difference between the single facer 17 and the double facer 22.

The mill roll stand 19 is equipped with roll paper on both sides of which the front liner A is wound into a roll, and a splicer for splicing paper between each roll paper is provided. While paper is being fed from one roll, the other roll is loaded and prepared for splicing, and when one roll is running low, the splicer splices the other roll onto one roll. be done. Therefore, the front liner A is continuously fed from the mill roll stand 19 toward the downstream side.

In the preheater 20, three preheating rolls 31, 32, and 33 are arranged side by side in the Z direction. The preheating roll 31 heats the front liner A, the preheating roll 32 heats the single-sided corrugated sheet D2, and the preheating roll 33 heats the single-sided corrugated sheet D1. Each of the preheating rolls 31, 32, and 33 has a winding amount adjusting device (not shown), and is heated to a predetermined temperature by supplying steam inside, and has a front liner A, a single-sided corrugated sheet D2, and a single-sided corrugated sheet on the circumferential surface. Preheating is performed by winding the sheet D1.

In the glue machine 21, gluing rolls 34 and 35 are arranged side by side in the Z direction. The gluing roll 34 performs gluing by contacting the top of each tier of the core B2 in the single-sided corrugated sheet D2 heated by the preheating roll 32. The gluing roll 35 performs gluing by contacting the top of each tier of the core B1 in the single-sided corrugated sheet D1 heated by the preheating roll 33. The single-sided corrugated cardboard sheets D1 and D2 glued by the glue machine 21 are transferred to the double facer 22 for the next process. The front liner A heated by the preheating roll 31 also passes through the glue machine 21 and is transferred to the double facer 22.

The double facer 22 has an upstream heating section 36 and a downstream cooling section 37 along the running line of each single-sided corrugated sheet D1, D2 and front liner A. The single-sided corrugated sheets D1 and D2 and the front liner A, which have been glued by the glue machine 21, are carried between the pressure belt and the hot plate in the heating section 36, and are cooled together while overlapping each other. Transferred to section 37. During this transportation, the single-sided corrugated cardboard sheets D1 and D2 and the front liner A are heated while being pressurized, and are pasted together to form a continuous double-sided corrugated cardboard sheet E, which is then naturally cooled while being conveyed.

The double-sided corrugated cardboard sheet E manufactured by the double facer 22 is transferred to the slitter scorer 24. The slitter scorer 24 cuts the wide double-sided corrugated cardboard sheet E along the X direction to have a predetermined width, and processes ruled lines extending in the X direction. The slitter scorer 24 includes a first slitter scorer unit 38 and a second slitter scorer unit 39, which are arranged along the X direction of the double-sided corrugated cardboard sheet E and have substantially the same structure. The wide double-sided corrugated cardboard sheet E is cut by the slitter scorer 24 to form a double-sided corrugated cardboard sheet E with a predetermined width.

The cutoff 25 cuts the double-sided corrugated cardboard sheet E cut in the X direction by the slitter scorer 24 along the Y direction to form a plate-shaped double-sided corrugated cardboard sheet F having a predetermined length. The defective product discharging device 26 discharges double-sided corrugated cardboard sheets F determined to be defective by a defect detection device described later from the conveyance line. The stacker 27 stacks the double-sided corrugated cardboard sheets F determined to be good and discharges them as a product to the outside of the machine.

By the way, as mentioned above, the single facers 13 and 17 are made by processing the heated cores B1 and B2 into a wavy shape, gluing them to the top of each step, and pasting together the heated back liners C1 and C2 to form a single-sided corrugated board. Form sheets D1 and D2. When the single facers 13 and 17 work in this manner, the waveforms of the cores B1 and B2 may be deformed. If the cores B1 and B2 are deformed, defects such as poor adhesion will occur when the back liners C1 and C2 and the front liner A are bonded to the cores B1 and B2, resulting in a defective corrugated board sheet.

Here, the single facers 13 and 17 will be explained in detail. FIG. 2 is a schematic configuration diagram showing a single facer. Note that since the single facers 13 and 17 have substantially the same configuration, only one single facer 13 will be described, and a description of the single facer 17 will be omitted.

As shown in FIG. 2, the single facer 13 includes a belt roll 41, a tension roll 42, a pressure belt 43, an upper roll 44, and a lower roll 45.

The belt roll 41 can be driven and rotated by a drive device (not shown). The tension roll 42 is rotatably supported at a predetermined distance from the belt roll 41. The pressure belt 43 is an endless belt, and is wound between the belt roll 41 and the tension roll 42. The upper roll 44 can be driven and rotated by a drive device (not shown), and has a corrugated outer peripheral surface. The upper roll 44 is disposed below the pressure belt 43 in the Z direction between the belt roll 41 and the tension roll 42, and its wavy outer peripheral surface contacts the lower surface of the pressure belt 43 under pressure. Like the upper roll 44, the lower roll 45 has a corrugated outer peripheral surface, and meshes with the outer peripheral surface of the upper roll 44 below the upper roll 44 in the Z direction.

Therefore, after being wound around the guide roll 46, the back liner C1 is transferred together with the pressure belt 43 guided by the belt roll 41 to the nip portion between the pressure belt 43 and the upper roll 44. On the other hand, the core B1 is wound around the guide roll 47, processed into a wave shape at the meshing part between the upper roll 44 and the lower roll 45, and then guided by the upper roll 44 and then connected to the pressure belt 43 and the upper roll. 44.

Furthermore, the single facer 13 includes a gluing device 51. The gluing device 51 is arranged near the upper roll 44 in the X direction. The gluing device 51 includes a gluing dam 52, a gluing roll 53, a meter roll 54, and a gluing blade 55.

The glue dam 52 stores a predetermined amount of glue. The gluing roll 53 performs gluing by attaching the glue stored in the glue dam 52 to the core B1 conveyed by the upper roll 44. The meter roll 54 adjusts the amount of glue adhered to the outer circumferential surface of the gluing roll 53 by contacting and rotating synchronously with the outer circumferential surface of the gluing roll 53. The glue scraping blade 55 scrapes off excess glue adhering to the outer circumferential surface of the meter roll 54 by removing it from the gluing roll 53 by contacting the outer circumferential surface of the meter roll 54.

Therefore, the glue stored in the glue dam 52 adheres to the rotating gluing roll 53, and the meter roll 54 adjusts the amount of glue adhered to the outer peripheral surface. The core B1, which has been processed into a wave shape at the meshing portion between the upper roll 44 and the lower roll 45, comes into contact with the gluing roll 53 and is glued to the top of each step. When the glued core B1 is transferred to the nip between the pressure belt 43 and the upper roll 44, it is bonded to the back liner C1 to form a single-sided corrugated board sheet D1.

Note that the belt roll 41, tension roll 42, upper roll 44, and lower roll 45 are heated by the passage of steam inside them. Therefore, the back liner C is heated when it comes into contact with the belt roll 41 and the tension roll 42 via the pressure belt 43. The core B1 is heated when it is pressurized at the meshing portion between the upper roll 44 and the lower roll 45 and processed into a wave shape. Further, the core B1 is heated from this meshing portion until it is overlapped with the back liner C by the pressure belt 43 and the upper roll 44. While being heated, glue is applied to the tops of each tier by the gluing roll 53, and the core B1 is transferred to the nip between the pressure belt 43 and the upper roll 44. Here, the back liner C and the core B are pressed and joined together. The adhesive increases its adhesive strength and solidifies when it receives a predetermined amount of heat, and the core B1 and back liner C1 are bonded together when the glue receives heat and solidifies, forming a single-sided corrugated sheet D1. Ru.

Further, although not shown, a pressure adjustment device is provided which can adjust the pressure applied to the core B and the back liner C by the upper roll 44 and the pressure belt 43. The pressurizing force adjustment device has a hydraulic cylinder, and the tip of a drive rod is connected to the support shaft of the tension roll 42. Therefore, the tension of the pressure belt 43 is adjusted by moving the tension roll 42 toward and away from the belt roll 41 using a hydraulic cylinder, and the center core B1 and back side transported between the upper roll 44 and the pressure belt 43 are adjusted. The pressing force of the liner C1 can be adjusted.

The single facer 13 is provided with preheaters 61 and 62. Preheater 61 is arranged adjacent to guide roll 46 . The preheater 61 has two preheating rolls 63 and 64 arranged in the Z direction. The preheating rolls 63 and 64 heat the back liner C1 by wrapping the back liner C1 around them. The preheating rolls 63 and 64 have a winding amount adjusting device (not shown), and are heated to a predetermined temperature by supplying steam thereinto. Preheater 62 is arranged adjacent to guide roll 47 . Preheater 62 has one preheating roll 65. The preheating roll 65 heats the core B1 by wrapping the core B1 around it. The preheating roll 65 has a winding amount adjusting device (not shown), and is heated to a predetermined temperature by supplying steam thereinto.

Here, the corrugated paperboard sheet defect detection device of this embodiment will be explained. FIG. 3 is a schematic diagram showing the installed state of the corrugated paperboard sheet defect detection device.

As shown in FIG. 3, the corrugated sheet defect detection device 70 is provided between the bridge 18 and the preheater 20. The corrugated paperboard sheet defect detection device 70 includes a first defect detection device 70A that detects defects in the single-sided corrugated sheet D1 (B1, C1), and a second defect detection device that detects defects in the single-sided corrugated sheet D2 (B2, C2). 70B, and have almost the same configuration. The single-sided corrugated sheet D1 conveyed from the bridge 14 side is guided by guide rollers 71a, 72a, and 73a to reach the first defect detection device 70A, and is guided by guide rollers 74a, 75a, 76a, and 77a to the preheater 20 side. transported. Furthermore, the single-sided corrugated cardboard sheet D2 conveyed from the bridge 18 side is guided by guide rollers 71b, 72b, and 73b to reach the second defect detection device 70B, and is guided by guide rollers 74b, 75b, and 76b to the preheater 20 side. transported.

Support plates 79 and 80 are fixed to the frame 78, guide rollers 73a and 73b are rotatably supported by the support plate 79, and guide rollers 74a, 74b, 75a, 75b, 76a, 76b, and 77a are rotatably supported by the support plate 80. Supported by Further, the support plate 79 supports imaging devices 82a and 82b, which will be described later, and the support plate 80 supports irradiation devices 81a and 81b, which will be described later. Hereinafter, the corrugated cardboard sheet defect detection device 70 (70A, 70B) will be described in detail.

FIG. 4 is a schematic configuration diagram showing a defect detection device for corrugated paperboard sheets, and FIG. 5 is a schematic diagram showing the arrangement configuration of an irradiation device and an imaging device for a single-sided corrugated paperboard sheet.

As shown in FIG. 4, the corrugated sheet defect detection device 70 (70A, 70B) is conveyed by guide rollers 73, 74, 75, 76 with the corrugated core B (B1, B2) on the outside. Deformation of the center core B of the single-sided corrugated cardboard sheet D (D1, D2), that is, a defective part is detected. The cardboard sheet defect detection device 70 includes guide rollers 73, 74, 75, and 76 as guide members, as well as an irradiation device 81 (81a, 81b), an imaging device 82 (82a, 82b), and a control device 83. , a notification device 84, and a display device 85. The control device 83 includes a shadow image processing device 86, a determination device 87, and a storage device 88. Further, the corrugated paperboard sheet defect removal device 94 includes a corrugated sheet defect detection device 70 and a defective product discharge device 26 . Specifically, the corrugated paperboard sheet defect removal device 94 includes a defect position specifying device 89 that constitutes the control device 83 and a tracking device 90 .

Hereinafter, the corrugated paperboard sheet defect detection device 70 and the corrugated paperboard sheet defect removal device 94 will be described in detail.

The guide rollers 73, 74, 75, and 76 can be driven to rotate or driven to rotate, and can guide and convey the single-sided corrugated paperboard sheet D at the outer periphery. The single-sided corrugated cardboard sheet D is formed by pasting a corrugated core B to a back liner C, and the guide roller 75 guides the single-sided corrugated cardboard sheet D with the corrugated core B on the outside. do.

The irradiation device 81 irradiates parallel light toward the core B at an irradiation angle that is inclined by a predetermined angle with respect to the perpendicular to the single-sided corrugated sheet D. The imaging device 82 images the irradiated portion (shade) of the parallel light on the central core B. The shadow image processing device 86 defines bright areas and dark areas along the conveyance direction of the single-sided corrugated cardboard sheet D based on the captured image captured by the imaging device 82 . The determining device 87 compares the length of the bright portion and the length of the dark portion defined by the shadow image processing device 86 with preset determination values to determine the quality of the single-sided corrugated cardboard sheet D. The storage device 88 stores determination values used by the determination device 87. Further, the notification device 84 notifies the determination result of the determination device 87, and the display device 85 displays the determination result of the determination device 87.

Furthermore, the defective position specifying device 89 specifies the position of the defective portion in the single-sided corrugated paperboard sheet D detected by the corrugated paperboard sheet defect detection device 70. The tracking device 90 tracks the position of the defective part in the single-sided corrugated cardboard sheet D specified by the defective position specifying device 89. The control device 83 operates the defective product discharge device 26 based on the tracking result of the tracking device 90.

As shown in FIGS. 4 and 5, the irradiation device 81 is placed at a predetermined distance from the guide roller 75, and is fixed to the device main body (support plate 80) by a mounting bracket 91. Further, the irradiation device 81 is arranged facing the circumferential surface of the guide roller 75 so as to correspond to the length of the guide roller 75 in the axial direction, and is guided by the outer circumferential surface of the guide roller 75, that is, the guide roller 75. Parallel light is irradiated onto the entire width of the single-sided corrugated cardboard sheet D. This parallel light is light that, particularly when the guide roller 75 is viewed from the axial direction, the optical axis of the light directed toward the guide roller 75 does not spread radially but travels straight in parallel to each other.

The imaging device 82 is arranged at a position separated from the guide roller 75 by a predetermined distance, and is fixed to the device main body (support plate 79) by a mounting bracket 92. Further, the imaging device 82 is arranged to face the intermediate position of the guide roller 75 in the axial direction, and images the outer peripheral surface of the guide roller 75, that is, the entire width area of the single-sided corrugated sheet D guided by the guide roller 75. . The imaging device 82 is one or more line cameras, and images the irradiation part at the center core B that has a wave shape. In this case, the imaging device 82 captures an image of one pixel along the conveyance direction of the single-sided corrugated paperboard sheet D and a plurality of pixels along the width direction of the single-sided corrugated paperboard sheet D. Therefore, in the imaging device 82, the imaging interval is set according to the conveyance speed of the single-sided corrugated paperboard sheet D or the pitch of the waveform of the center core B.

In this embodiment, the imaging device (line camera) 82 is arranged on a line perpendicular to the single-sided corrugated sheet D, that is, on a line passing through the center of the guide roller 73 in the radial direction, but the irradiation device 81 It is arranged on a line that is inclined at a predetermined angle (irradiation angle) with respect to the perpendicular to the sheet D (the line along the radial direction passing through the center of the guide roller 75).

The irradiation device 81 irradiates parallel light toward the center B at a predetermined irradiation angle. A wavy shadow of the center core B is formed by the parallel irradiation light, thereby forming a bright area and a dark area. Here, since the irradiation light is parallel light, a boundary line is clearly formed between the bright part and the dark part, and the length of the bright part and the length of the dark part can be defined with high precision.

The shadow image processing device 86 defines bright areas and dark areas from the shadow of each waveform of the center core B from the captured image of the imaging device 82. In this case, the imaging device (line camera) 82 detects one wavy shadow on the wavy core B by one pixel along the conveyance direction of the single-sided corrugated sheet D, and at one pixel along the width direction of the single-sided corrugated sheet D. The image is captured as a multi-pixel image. Therefore, the shadow image processing device 86 combines a plurality of 1 pixel x multiple pixel images along the conveyance direction of the single-sided corrugated sheet D, thereby forming a plurality of consecutive bright areas in a predetermined length of the single-sided corrugated sheet D. Define the dark side.

The determining device 87 compares the length of the bright portion and the length of the dark portion defined by the shadow image processing device 86 with determination values to determine whether the single-sided corrugated sheet D is good or bad. In this case, the determining device 87 compares the length of the bright portion with the bright portion determination value to determine quality, or compares the length of the dark portion with the dark portion determination value to determine quality. That is, when the single-sided corrugated paperboard sheet D is conveyed, bright areas and dark areas are defined continuously, and the determination device 87 performs quality determination, and successively determines the quality of the bright areas and the quality of the dark areas.

For the single-sided corrugated cardboard sheet D, standard values for its shape (design values for waveform height and pitch) are set according to the specifications (size, type of flute, etc.) of the double-sided corrugated cardboard sheet F to be manufactured. When the irradiation angle of the parallel light in the irradiation device 81 is set to a predetermined angle, a determination reference value is set in advance through experiments or the like in accordance with the waveform of the center core B of the single-sided corrugated cardboard sheet D, which is set to a standard value. Although the determination reference value may be used as the determination value, it is preferable to set a determination reference range for the double-sided corrugated cardboard sheet F that is determined to be a good product by considering manufacturing errors, detection errors, and the like. That is, if the length of the bright area calculated by the shadow image processing device 86 is within the bright area determination area, the single-sided corrugated sheet D is determined to be good, and if it is not within the bright area determination area, the single-sided corrugated sheet D is determined to be good. is determined to be defective. Similarly, if the length of the dark area calculated by the shadow image processing device 86 is within the dark area determination area, the single-sided corrugated sheet D is determined to be good, and if it is not within the dark area determination area, the single-sided corrugated sheet D is determined to be defective. It is judged to be a good product.

Here, the processing of the shadow image processing device 86 and the determination device 87 will be explained in detail. FIG. 6 is a flowchart showing a defect detection method.

As shown in FIG. 6, in step S11, the captured shadow image of center core B is projected. In step S12, noise is removed by smoothing the added luminance in the transport direction. In step S13, the difference in the added brightness of pixels adjacent in the transport direction is determined, that is, the difference is determined. In step S14, since the difference value becomes large at the edge between the bright part and the dark part, a peak value at which the difference value becomes large is extracted. In step S15, the length of the bright part is calculated.

In step S16, the length of the bright part and the bright part determination area are compared to determine whether the length of the bright part is within the bright part determination area. Here, if it is determined that the length of the bright part is within the bright part determination area (Yes), it is determined that it is not a defective part and the process moves to step S17, and here, it is determined that the waveform of center core B is not a defective part. Determine normal. On the other hand, if it is determined in step S16 that the length of the bright part is not within the bright part determination area (No), it is assumed that a defective part has been detected and the process moves to step S18. In step S18, it is determined that the waveform of the core B is a defective part, and in step S19, the defective double-sided corrugated cardboard sheet F including the defective part is discharged to the outside from the conveyance line.

Note that in the processing of the single-sided corrugated paperboard sheet D by the determination device 87, the length of the bright portion and the bright portion determination area are compared, but the method is not limited to this method. For example, the length of the dark part and the dark part determination area may be compared, or the length of the bright part and the dark part may be compared with the bright part determination area and the dark part determination area.

As shown in FIG. 4, when a defective part occurs at a predetermined position of the core B of the single-sided corrugated paperboard sheet D, the position where the defective part occurs is tracked and the double-sided corrugated paperboard sheet F containing the defective part is removed. The defective position specifying device 89 determines whether the single-sided corrugated sheet D (the double-sided corrugated sheets E, F) is transported between the time when the waveform of the center core B is imaged by the imaging device 82 (time) and the time when the determining device 87 determines the defectiveness (date and time). The position of the defective part in the corrugated paper sheet transport direction is determined based on the corrugated paper sheet transport distance. The tracking device 90 tracks the position of the defective portion that moves over time, and estimates the timing (time) when the cut double-sided corrugated cardboard sheet F containing the defective portion will reach the defective product discharge device 26. Based on the tracking result of the tracking device 90, the control device 83 activates the defective product ejecting device 26 when the double-sided corrugated cardboard sheet F containing the defective portion reaches the defective product ejecting device 26. When the defective product discharge device 26 is activated, the defective double-sided corrugated cardboard sheet F discharged from the conveyance line is sent to a shredder by a conveyance device (not shown) and is cut.

In addition, the corrugated sheet defect detection device 70 determines whether there is an abnormality in the core B, and when a defective part is detected, when the defective part occurs, the defective part, and the manufacturing operation information of the corrugated sheet are correlated to determine the cause of the defective part occurrence. Identify.

That is, as shown in FIG. 4, the corrugated paperboard sheet defect detection device 70 includes a determination device 87 as a defect detection section and an association device 95 as an association section. The determination device 87 detects a defective part in the waveform of the single-sided corrugated cardboard sheet D, which is made up of a corrugated core B and a back liner C bonded to the core B. The association device 95 associates the defective portion with the manufacturing operation information of the corrugated board sheet when the determination device 87 detects the defective portion.

Furthermore, when the determination device 87 detects a defective part, the association device 95 calculates the time when the defective part occurred from the date and time of detection of the defective part, and associates the defective part with manufacturing operation information at the time of occurrence of the defective part. Further, the association device 95 identifies the cause of the defective part based on the manufacturing operation information.

Here, the defective part detection date and time is the detection date and time when the determination device 87 detected the defective part. The control device 83 has a calendar and a clock. The time when a defective part occurs is a time point or period when a defective part is estimated to have occurred. The manufacturing operation information includes the conveyance speed of the corrugated cardboard sheet, the sheet temperature of the core B, and the sheet temperature of the back liner C. As shown in FIG. 2, a temperature sensor 96 is provided between the preheat roll 65 and the guide roll 47 to detect the temperature of the back liner C (C1). A temperature sensor 97 is provided between the preheating roll 64 and the guide roll 46 to detect the temperature of the core B (B1). Further, a speed sensor 98 is provided to detect the speed of the single-sided corrugated paperboard sheet D (D1) from the tension roll 42. The sheet temperature detected by the temperature sensors 96 and 97 and the conveyance speed detected by the speed sensor 98 are input to the control device 83. Note that a plurality of temperature sensors 96 and 97 are arranged at predetermined intervals in the width direction of the center core B and the back liner C. Therefore, the temperature sensors 96 and 97 can detect the respective sheet temperatures on the drive side, center, and operation side in the center core B and back liner C.

Note that the manufacturing operation information is not limited to the conveyance speed of the corrugated board sheet, the sheet temperature of the core B, and the sheet temperature of the back liner C. For example, the temperature of the belt roll 41, tension roll 42, upper roll 44, lower roll 45, etc., the pressing force between the upper roll 44 and the lower roll 45, the amount of glue applied to the core B1, the preheating rolls 63, 64, 65 It may also be used to trace back to the amount of wrapping of the sheet. Further, the manufacturing operation information may be used tracing back to the tension of the core fed from the mill roll stand 11 and the back liner fed from the mill roll stand 12.

Further, a storage device 88 serving as a storage section stores data processed by the association device 95. A display device 85 serving as a display unit displays data processed by the association device 95.

The display device 85 displays an image of a defective portion of the single-sided corrugated cardboard sheet D (center core B) among the photographed images captured by the imaging device 82, and the defective portion detection date and time when the determination device 87 detected the defective portion. Manufacturing operation information when a defective part occurs can be displayed at the same time. In addition, the display device 85 displays an image of the defective portion of the single-sided corrugated sheet D (core B) and manufacturing operation information at the time of occurrence of the defective portion dating back from the defective portion detection date and time when the determining device 87 detected the defective portion. , can be partitioned in the width direction of the single-sided corrugated cardboard sheet D (center core B) and displayed simultaneously. Then, the correlation device 95 specifies the cause of the defective part occurrence based on the manufacturing operation information, and the display device 85 displays the manufacturing operation at the time of the defective part occurring back from the defective part detection date and time when the determining device 87 detected the defective part. Information and causes of defective parts can be displayed at the same time.

Here, the processing of the association device 95 will be explained. FIG. 7 is a flowchart showing data processing when a defect is detected.

As shown in FIGS. 4 and 7, in step S21, the control device 83 determines whether the determination device 87 has detected a defective part. Here, if it is determined that no defective part has been detected (No), this routine exits without doing anything. On the other hand, if it is determined that a defective part has been detected (Yes), the position of the defective part is specified in step S22. Specifically, the defective position specifying device 89 specifies the position of the defective part in the transport direction, and also determines the width direction position (for example, drive side, center, operation side), width direction range, or Determine the length. In step S23, the date and time of detection of the defective part is specified. Specifically, the determination device 87 compares the length of the bright part (dark part) with the bright part determination area (dark part determination area), and determines whether the length of the bright part (dark part) is within the bright part determination area (dark part determination area). Specify the date and time when it was determined whether or not the above-mentioned defectiveness was determined. In step S24, the time of occurrence of the defective part calculated retroactively from the date and time of defective part detection is specified. In step S25, manufacturing operation information when a defective part occurs is acquired. Then, in step S26, the time when a defective part occurs, the defective part, and manufacturing operation information are associated.

Here, the imaging device 82 (82a, 82b) of the corrugated paperboard sheet defect detection device 70 is provided between the bridge 18 and the preheater 20. The cause of defects in the single-sided corrugated cardboard sheet D is often due to poor adhesion when the back liners C1, C2 are bonded to the cores B1, B2. That is, defective portions occur due to poor adhesion in the single facer 13. The single facer 13 and the imaging device 82 are arranged offset by a predetermined distance with respect to the conveying direction of the single-sided corrugated paperboard sheet D. Therefore, the defective part detected by the corrugated cardboard sheet defect detection device 70 is the single facer 13 located on the upstream side of the single-sided corrugated cardboard sheet D in the conveying direction, and the defective part is the single-sided corrugated cardboard sheet D manufactured a predetermined time (predetermined distance) ago. be.

The distance between the single facer 13 and the corrugated sheet defect detection device 70 along the conveyance direction of the single-sided corrugated sheet D is set in advance. Moreover, the conveyance speed of the single-sided corrugated cardboard sheet D is also known. Therefore, the control device 83 can calculate the transport time of the single-sided corrugated paperboard sheet D from the single facer 13 to the corrugated paperboard sheet defect detection device 70. The sheet temperature from temperature sensors 96 and 97 and the conveyance speed from a speed sensor 98 are continuously input to the control device 83. When a defective part is detected, the control device 83 specifies the position of the defective part, specifies the date and time of detection of the defective part, and then determines the transport time of the single-sided corrugated sheet D from the single facer 13 to the corrugated sheet defect detection device 70. is calculated retrospectively to identify the time when the defective part occurred, and to obtain manufacturing operation information at the time the defective part occurred.

In step S27, the cause of the defective part is identified based on the manufacturing operation information associated with the defective part. For example, if the manufacturing operation information associated with the defective part is compared with preset standard manufacturing operation information, and the difference between the manufacturing operation information and the standard manufacturing operation information is large, then the manufacturing operation information at that time is changed to the defective part. Identify as the cause of occurrence. Thereafter, in step S28, the data processed by the association device 95 is stored in the storage device 88. Further, in step S29, the data processed by the association device 95 is displayed on the display device 85.

Here, a display method using the display device 85 will be explained. FIG. 8 is a schematic diagram showing a display screen on the display device, FIG. 9 is a schematic diagram showing the first display screen after operation on the display device, and FIG. 10 is a schematic diagram showing the second display screen after operation on the display device. 11A and 11B are schematic diagrams showing modified examples of the display screen of the display device.

As shown in FIG. 8, the display device 85 includes a first display section 101, a second display section 102, and a third display section 103 as a display screen 100. The first display section 101 has a display section 111 for the date of occurrence, a display section 112 for the detection time, a display section 113 for the detection location, a display section 114 for the detection length, and a display section 115 for displaying the presence/absence of the display. . The date of occurrence display section 111 displays the date of occurrence when the determination device 87 detected the defective part. The detection time display section 112 displays the time when the determination device 87 detected the defective part. The detection location display section 113 displays the locations where the determination device 87 has detected a defective portion (upper tier - single-sided corrugated cardboard sheet D1/lower tier - single-sided corrugated cardboard sheet D2). The detected length display section 114 displays the length of the defective portion detected by the determination device 87 in the transport direction. The display/non-display display section 115 is a switch for setting whether or not to display manufacturing operation information for defective parts.

The second display section 102 is provided with an order number display section 121, a driving side display section 122, a central display section 123, and an operation side display section 124. A display section 125 for displaying an order number is provided below the order number display section 121. Further, a display section 126 is provided below the drive side display section 122 to display an image including a defective part on the drive side of the single-sided corrugated cardboard sheet D. A display section 127 is provided below the central display section 123 for displaying an image including a defective part at the center of the single-sided corrugated sheet D. A display section 128 is provided below the operation side display section 124 for displaying an image including a defective part on the operation side of the single-sided corrugated cardboard sheet D.

The third display section 103 includes an order number display section 131, a sheet brand/basis weight display section 132, a conveyance speed display section 133, a sheet temperature (drive side) display section 134, and a sheet temperature (center) display section 135. and a seat temperature (operation side) display section 136 are provided. A display section 141 for displaying an order number is provided on the side of the order number display section 131. A display section 142 that displays the sheet brand and basis weight is provided on the side of the sheet brand/basis weight display section 132. A display section 143 that displays a graph of the conveyance speed of the single-sided corrugated cardboard sheet D is provided on the side of the conveyance speed display section 133. A display section 144 is provided on the side of the sheet temperature (drive side) display section 134 to display a graph of the sheet temperature of the core B and back liner C on the drive side. A display section 145 that displays a graph of the sheet temperature at the center of the core B and the back liner C is provided on the side of the sheet temperature (center) display section 135. A display section 146 is provided on the side of the sheet temperature (operation side) display section 136 for displaying a graph of the sheet temperature of the core B and back liner C on the operation side.

On the display screen 100 of the display device 85, everything on the display section 115 of the first display section 101 is "blank", so nothing is displayed on the second display section 102 and the third display section 103. do not have. For example, if you touch the display section 116 of the column displaying "2019.09.24" on the occurrence date display section 111, the touched display section 116 of the first display section 101 will be as shown in FIG. "Yes" is displayed, and various data are displayed on the second display section 102 and the third display section 103. In the second display section 102, two types of order numbers are displayed below the order number display section 121. Further, an image including a defective part on the drive side of the single-sided corrugated paperboard sheet D is displayed below the drive-side display section 122, an image containing the defective part at the center of the single-sided corrugated paperboard sheet D is displayed below the central display section 123, An image including a defective part on the operation side of the single-sided corrugated cardboard sheet D is displayed below the operation side display section 124. In this case, the image including the defective part is displayed based on the position of the defective part identified in step S22 described above. Here, in the second display section 102, the vertical direction is the conveyance direction of the single-sided corrugated paperboard sheet D, and the single-sided corrugated paperboard sheet D is conveyed from the bottom to the top.

Further, on the third display section 103, two types of order numbers are displayed on the sides of the order number display section 131. The sheet brand and basis weight are displayed on the side of the sheet brand/basis weight display section 132. A graph V of the conveyance speed of the single-sided corrugated cardboard sheet D according to two types of order numbers is displayed on the side of the conveyance speed display section 133. On the side of the sheet temperature (drive side) display section 134, graphs TBa and TCa of sheet temperatures on the drive side of the center core B (two-dot chain line) and back liner C (one-dot chain line) according to two types of order numbers are displayed. be done. Graphs TBb and TCb of the sheet temperature at the center of the center core B (two-dot chain line) and back liner C (one-dot chain line) according to two types of order numbers are displayed on the side of the sheet temperature (center) display section 135. . On the side of the sheet temperature (operating side) display section 136, graphs TBc and TCc of the sheet temperature on the operating side of the center core B (double-dashed line) and back liner C (dotted chain line) according to two types of order numbers are displayed. be done. Here, in the third display section 103, the left-right direction is the conveyance direction of the single-sided corrugated paperboard sheet D, and the single-sided corrugated paperboard sheet D is conveyed from the left to the right.

Further, the time display section 137 displays the time during the manufacturing operation corresponding to the sheet temperature graph. In this case, the displayed time is the time when the temperature was detected by the temperature sensors 96 and 97 (see FIG. 2), and the time when the temperature was detected is displayed as the time back from the detection time on the display unit 112.

In the second display section 102, images including defective parts are displayed below the drive-side display section 122, the central display section 123, and the operation-side display section 124, respectively. At this time, the positions of the defective parts identified in step S22 described above are displayed as defective parts 126a, 127a, and 128a surrounded by solid frames, for example. For example, when the defective part 128a of the operating side display section 124 is touched, only the defective section 128a of the operating side display section 124 is displayed on the second display section 102, as shown in FIG. 103, only graphs of the sheet temperatures on the operation side of the core B and back liner C are displayed.

Further, at this time, the third display section 103 displays the estimated defective part occurrence location. That is, when a defective part is detected, the position of the defective part is specified, the date and time of detection of the defective part is specified, and then the transportation time of the single-sided corrugated sheet D from the single facer 13 to the corrugated sheet defect detection device 70 is traced back. The calculation is performed to identify when a defective part occurs, and manufacturing operation information for the single facer 13 is acquired and displayed. Therefore, the estimated location of the defective portion corresponds to the detected length of the defective portion 128a displayed on the second display section 102. Further, the time displayed on the time display section 137 in the range of the estimated location where the defective portion has occurred is the time when the defective portion has occurred. In the third display section 103, when the order number changes, the conveyance speed of the single-sided corrugated cardboard sheet D increases, and the sheet temperature of the core B temporarily decreases. This decrease in the sheet temperature of the core B is identified as a cause of defective portion occurrence.

Note that the display screen 100 of the display device 85 is not limited to the one described above. As shown in FIG. 11, the display screen 100A includes a first display section 101A, a second display section 102, and a third display section 103. The first display section 101A includes a display section 111 for the date of occurrence, a display section 112 for the detection time, a display section 113 for the detection location, a display section 114 for the detection length, and a display section 115a for displaying whether or not the driving side is displayed. , a central display section 115b for displaying the display, and a display section 115c for displaying the operation side. That is, the display section 115 for indicating whether or not to display is divided into display sections 115a, 115b, and 115c for displaying at the drive side, center, and operation side. The other configurations are similar to the display screen 100.

In the display device 85 described above, the display switching of the display screen 100 is performed online during the manufacture of the corrugated paperboard sheet, but it can also be performed offline after the manufacture of the corrugated paperboard sheet.

[Actions and effects of this embodiment]
The defect detection device for a corrugated cardboard sheet according to the first aspect is a determination device (defect detection section) 67, and an association device (association section) 95 that associates the detected defective section with manufacturing operation information of the corrugated board sheet when the determination device 67 detects the defective section.

The corrugated sheet defect detection device according to the first aspect detects a defective portion in the waveform of a single-sided corrugated sheet D consisting of a core B and a back liner C, and associates the defective portion with corrugated sheet manufacturing operation information. Therefore, it is possible to analyze the cause of the occurrence of the defective part.

In the corrugated paperboard sheet defect detection apparatus according to the second aspect, an association device 95 calculates the time when the defective part occurs from the date and time of defective part detection, and associates the defective part with manufacturing operation information at the time of occurrence of the defective part. Thereby, it is possible to correlate the time when a defective part occurs, the defective part, and the manufacturing operation information, and analyze the cause of the occurrence of the defective part.

In the corrugated paperboard sheet defect detection device according to the third aspect, an association device 95 identifies the cause of the defective portion based on manufacturing operation information when the defective portion occurs. This makes it possible to take measures against the occurrence of defective parts by analyzing the factors that caused the defective parts to occur.

In the corrugated sheet defect detection device according to the fourth aspect, the manufacturing operation information includes at least temperature data of the core B. It is highly likely that the occurrence of defective parts in corrugated cardboard sheets is due to fluctuations in the temperature of the core B, so by monitoring the temperature data of the core B, it is possible to analyze with high precision the causes of the occurrence of defective parts. can.

In the corrugated cardboard sheet defect detection device according to the fifth aspect, the manufacturing operation information includes at least conveyance speed data of the core B. As a result, it is highly likely that the occurrence of defective parts in corrugated cardboard sheets is due to fluctuations in the conveyance speed of core B, so by monitoring the conveyance speed data of core B, the cause of the occurrence of defective parts can be identified with high accuracy. can be analyzed.

The corrugated sheet defect detection device according to the sixth aspect includes a storage device (storage unit) 88 that stores data processed by the association device 95. This makes it possible to analyze the cause of the occurrence of defective parts even after the corrugated cardboard sheet has been manufactured.

The corrugated sheet defect detection device according to the seventh aspect includes a display device (display section) 85 that displays data processed by the association device 95. This makes it possible to analyze the cause of defective parts even during the manufacture of corrugated cardboard sheets.

The corrugated sheet defect detection device according to the eighth aspect includes an imaging device (photographing unit) 82 that photographs the center core B of the single-sided corrugated sheet D, and a display device 85 displays the center core B photographed by the imaging device 82. An image of the defective part and manufacturing operation information at the time of occurrence of the defective part can be displayed simultaneously. This allows the operator to simultaneously confirm the image of the defective portion of the core B and the manufacturing operation information at the time the defective portion occurred.

In the corrugated sheet defect detection device according to the ninth aspect, the display device 85 displays the image of the defective portion of the core B taken by the imaging device 82 and the manufacturing operation information at the time of occurrence of the defective portion of the core B. It can be partitioned in the width direction and displayed simultaneously. This allows the operator to simultaneously check the image of the defective part divided in the width direction of the core B and the manufacturing operation information at the time the defective part occurred, and also to check where in the width direction the defect has occurred. It can be confirmed.

In the corrugated sheet defect detection device according to the tenth aspect, the display device 85 simultaneously displays manufacturing operation information at the time of occurrence of the defective part and a cause of occurrence of the defective part identified based on the manufacturing operation information at the time of occurrence of the defective part. It is possible. This allows the operator to simultaneously confirm manufacturing operation information and causes of defective parts.

The corrugated sheet defect removal device according to the eleventh aspect includes a corrugated sheet defect detection device 70 and discharges a double-sided corrugated sheet F cut into a predetermined length including a defective portion detected by the corrugated sheet defect detection device 70. and a defective product discharge device 26. Thereby, when the corrugated paperboard sheet defect detection device 70 detects a defective corrugated paperboard sheet, it can analyze the cause of the occurrence of the defective portion, and can appropriately discharge the corrugated cardboard sheet including the defective portion.

The corrugating machine (corrugated sheet manufacturing apparatus) according to the twelfth aspect includes a single facer 17 for manufacturing a single-sided corrugated sheet D by bonding a back liner C to a corrugated core B; It has a double facer 22 for manufacturing a double-sided corrugated sheet E by bonding a front liner A to the core B side of a single-sided corrugated sheet D to be manufactured, and a corrugated sheet defect removal device 94. Thereby, when the corrugated paperboard sheet defect detection device 70 detects a defective corrugated paperboard sheet, it is possible to analyze the cause of the occurrence of the defective portion, and the quality of the double-sided corrugated paperboard sheet E can be improved.

In the embodiment described above, the irradiation device 81, the imaging device 82, the shadow image processing device 86, and the determination device 87 were provided as the corrugated paperboard sheet defect detection device 70, but the configuration is not limited to this. isn't it. Another configuration may be used to detect defects in corrugated cardboard sheets.

Further, in this embodiment, when displaying the defective part, an image including the defective part is displayed, and the defective part is displayed surrounded by a frame line, but the present invention is not limited to this. For example, the defective part may be displayed using coordinates, serial numbers, or colored markings to identify the defective part.

10 Corrugate machine (corrugated sheet manufacturing equipment)
11, 12, 15, 16, 19 Mill roll stand 13, 17 Single facer 14, 18 Bridge 20 Preheater 21 Glue machine 22 Double facer 23 Rotary shear 24 Slitter scorer 25 Cutoff 26 Defective product discharge device 27 Stacker 31, 32, 33 Preheating roll 34, 35 Gluing roll 41 Belt roll 42 Tension roll 43 Pressure belt 44 Upper roll 45 Lower roll 46, 47 Guide roll 51 Gluing device 52 Gluing dam 53 Gluing roll 54 Meter roll 55 Gluing blade 61, 62 Preheater 63, 64, 65 Preheating roll 70 Corrugated cardboard sheet defect detection device 70A First defect detection device 70B Second defect detection device 81 Irradiation device 82 Imaging device 83 Control device 84 Notification device 85 Display device (display unit)
86 Shadow image processing device 87 Judgment device (defect detection unit)
88 Storage device (storage unit)
89 Defect location identification device 90 Tracking device 94 Defect removal device 95 Association device (association unit)
96, 97 Temperature sensor 98 Speed sensor 100, 100A Display screen 101 First display section 102 Second display section 103 Third display section 111 Display section for date of occurrence 112 Display section for detection time 113 Display section for detection point 114 Detection length Display section 115 Display section for display presence/absence 121 Order number display section 122 Drive side display section 123 Center display section 124 Operation side display section 125, 126, 127, 128 Display section 126a, 127a, 128a Defective part 131 Order number display section 132 Sheet brand/basis weight display section 133 Conveying speed display section 134 Sheet temperature (drive side) display section 135 Sheet temperature (center) display section 136 Sheet temperature (operation side) display section 141, 142, 143, 144, 145, 146 Display section A Front liner (first liner)
B, B1, B2 Core C, C1, C2 Back liner (second liner)
D, D1, D2 Single-sided corrugated sheet E, F Double-sided corrugated sheet

Claims (11)

a defect detection unit that detects defects in the waveform of the single-sided corrugated cardboard sheet after the single-sided corrugated sheet is made of a corrugated core and a liner bonded to the core;
an association unit that associates the detected defective part with manufacturing operation information of the corrugated cardboard sheet when the defective detection unit detects the defective part;
Equipped with
When the defective detection section detects the defective part, the association unit calculates the time when the defective part occurred by going back from the date and time of defective part detection, and calculates the time when the defective part occurred and the manufacturing operation information at the time when the defective part occurred. association,
The defect detection section includes a display section that displays the data processed by the association section, the defect detection section includes a photographing section that photographs the core, and the display section displays an image of the defective portion photographed by the photographing section. and the manufacturing operation information when the defective part occurs can be displayed simultaneously.
Corrugated sheet defect detection device. The associating unit is configured to determine whether the single facer is based on the distance along the conveyance direction of the single-sided corrugated sheet between the single facer that manufactures the single-sided corrugated sheet and the defect detection unit, and the conveyance speed of the single-sided corrugated sheet. The transportation time of the single-sided corrugated paperboard sheet to the defect detection section is calculated, and the transportation time of the single-sided corrugated paper sheet is traced back from the defect detection date and time when the defect detection section detects the defective section, and the time when the defective section occurs is calculated. calculate,
The corrugated cardboard sheet defect detection device according to claim 1. The association unit identifies a cause of the defective part based on the manufacturing operation information at the time of the defective part.
The corrugated cardboard sheet defect detection device according to claim 1 or 2 . The manufacturing operation information includes at least temperature data of the core.
A defect detection device for a corrugated cardboard sheet according to any one of claims 1 to 3. The manufacturing operation information includes at least transport speed data of the core,
A defect detection device for a corrugated cardboard sheet according to any one of claims 1 to 4. comprising a storage unit that stores data processed by the association unit;
A defect detection device for a corrugated cardboard sheet according to any one of claims 1 to 5. a display unit that displays data processed by the association unit;
A defect detection device for a corrugated cardboard sheet according to any one of claims 1 to 6. The display section divides the core in the width direction, and displays an image of a defective part in each section of the core taken by the imaging section, and an image of the defective part when the defective part occurs in each section of the core. It is possible to display manufacturing operation information at the same time .
The corrugated cardboard sheet defect detection device according to any one of claims 1 to 7 . The display unit includes a display unit that displays data processed by the association unit, and the display unit displays the manufacturing operation information at the time when the defective part occurred and the manufacturing operation information at the time when the defective part occurred. It is possible to display the cause of the occurrence at the same time.
A defect detection device for a corrugated cardboard sheet according to any one of claims 1 to 8 . A corrugated sheet defect detection device according to any one of claims 1 to 9 ,
a discharging device that discharges a double-sided corrugated cardboard sheet cut to a predetermined length including the defective portion detected by the corrugated sheet defect detection device;
A device for removing defects from corrugated cardboard sheets. A single facer that produces a single-sided corrugated sheet by laminating a second liner to a corrugated core;
a double facer for producing a double-sided corrugated sheet by bonding a first liner to the center core side of the single-sided corrugated sheet;
A corrugated sheet defect removing device according to claim 10 ;
A corrugated sheet manufacturing device comprising:

Images