WO2020044820A1 - Apparatus and method for eliminating defect from sheet, and corrugated cardboard sheet manufacturing apparatus - Google Patents

Apparatus and method for eliminating defect from sheet, and corrugated cardboard sheet manufacturing apparatus Download PDF

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Publication number
WO2020044820A1
WO2020044820A1 PCT/JP2019/027806 JP2019027806W WO2020044820A1 WO 2020044820 A1 WO2020044820 A1 WO 2020044820A1 JP 2019027806 W JP2019027806 W JP 2019027806W WO 2020044820 A1 WO2020044820 A1 WO 2020044820A1
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WO
WIPO (PCT)
Prior art keywords
length
cardboard sheet
cutting
corrugated cardboard
sheet
Prior art date
Application number
PCT/JP2019/027806
Other languages
French (fr)
Japanese (ja)
Inventor
妹尾　慎一郎
章 荻野
修 渡鍋
直行 福重
Original Assignee
三菱重工機械システム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 三菱重工機械システム株式会社 filed Critical 三菱重工機械システム株式会社
Priority to KR1020207035901A priority Critical patent/KR102596626B1/en
Publication of WO2020044820A1 publication Critical patent/WO2020044820A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2822—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard involving additional operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2831—Control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing

Definitions

  • the present invention provides, for example, a sheet defect removing device and method for removing defective products of a corrugated cardboard sheet manufactured by bonding a front liner, a corrugated core, and a back liner, and a sheet defect removing device.
  • the present invention relates to an apparatus for manufacturing a corrugated cardboard sheet.
  • a corrugating machine as a corrugated cardboard sheet manufacturing apparatus includes a single facer for forming a single-sided corrugated cardboard sheet, a double facer for forming a double-sided corrugated cardboard sheet by bonding a front liner paper to the single-sided corrugated cardboard sheet, and a continuous double-faced corrugated cardboard sheet. It is provided with a slitter scorer for cutting into a width and a cutoff for cutting a continuous double-faced corrugated cardboard sheet into a predetermined length.
  • the single facer forms the corrugated core and forms a single-sided corrugated cardboard sheet by laminating the back liner.
  • the double facer forms a double-sided corrugated cardboard sheet by laminating the front liner to the single-side corrugated cardboard sheet.
  • the continuous double-faced corrugated cardboard sheet manufactured by the double facer is cut to a predetermined width by a slitter scorer, and cut to a predetermined length by a cutoff to form a plate-like corrugated cardboard sheet.
  • the double-faced corrugated cardboard sheet is manufactured by laminating the front liner, the corrugated core, and the back liner, but as a front liner, a preprint liner that has already been printed on the surface is used. May be used.
  • the cut-off is performed by cutting a continuous corrugated cardboard sheet into a predetermined length, thereby obtaining a plate-shaped corrugated cardboard sheet.
  • a cutting mark is printed in advance at a cutting position, and the cutoff is performed by detecting the cutting mark and cutting a continuous cardboard sheet at the position of the cutting mark.
  • a plate-shaped corrugated cardboard sheet having a predetermined length according to the design As an apparatus for manufacturing a corrugated cardboard sheet using a preprint liner, for example, there is one described in the following Patent Document.
  • the corrugated cardboard sheet is regarded as a defective part such as a paper spliced part or a deformed part of the corrugated core, and a plate-shaped corrugated cardboard sheet with this defective part is regarded as a defective product from the conveyance line during production. Discharged outside. That is, when the detecting device detects a defective portion of the corrugated cardboard sheet, or when the operator determines that it is defective, and performs a predetermined operation, the cutoff cuts the corrugated cardboard sheet into a predetermined length, and then the plate with the defective portion is cut off. The corrugated cardboard sheet is removed from the transport line by a defective product discharging device.
  • the defective product discharging device puts the corrugated cardboard sheet of the defective product removed from the transport line into a defective product collection box, or transports the defective cardboard sheet to a collecting station or a shredder by a discharge conveyor crossing the transport line.
  • the defective product collection box and the discharge conveyor become longer than the entire length of the plate-shaped corrugated cardboard sheet.
  • a large arrangement space is required, and it is difficult to arrange the defective box near the transport line.
  • the cardboard sheet has no cutting mark printed in advance at the cutting position, it is possible to change the cutting length to an arbitrary length when a defect occurs, but in the case of a cardboard sheet using a preprint liner, the cutting length can be changed. If a defective cardboard sheet of a size that cannot be removed from the transport line occurs because it is cut based on the mark, the operator has to remove it manually from the transport line, which places a heavy burden on the operator, There is a problem that efficiency is not good.
  • the present invention solves the above-mentioned problems, and a sheet defect removing apparatus and method for appropriately removing a defective corrugated cardboard sheet from a transport line regardless of the sheet length to improve work efficiency, and
  • An object of the present invention is to provide an apparatus for manufacturing a corrugated cardboard sheet.
  • a sheet defect removing apparatus is directed to a sheet-shaped corrugated cardboard sheet having a predetermined length formed by bonding a first liner, a corrugated core, and a second liner.
  • a sheet defect removing device for removing a defective product a cutting device for cutting a corrugated cardboard sheet along a width direction, a defect detecting device for detecting a defective portion of the corrugated cardboard sheet, and a plate-shaped corrugated cardboard sheet including the defective portion are provided.
  • a defective product discharge device that discharges from the transport line, and the defective product discharge device is operated according to the detection result of the defective detection device, and the length of the plate-shaped corrugated cardboard sheet is longer than the discharge allowable length of the defective product discharge device.
  • a control device for controlling the cutting device so as to cut the corrugated cardboard sheet including the defective portion to a length shorter than the discharge allowable length.
  • the control device operates the defective product discharging device according to the detection result of the defect detecting device, and discharges the plate-shaped cardboard sheet including the defective portion from the transport line. I do.
  • the control device controls the cutting device to reduce the length of the corrugated cardboard sheet including the defective portion to a length shorter than the allowable discharge length. Cut into pieces. Then, the corrugated cardboard sheet including the defective portion becomes shorter than the allowable discharge length, and the corrugated cardboard sheet including the defective portion can be properly discharged from the transport line by the defective product discharging device.
  • the defective corrugated cardboard sheet can be properly removed from the transport line to improve the working efficiency.
  • the control device moves the corrugated cardboard sheet including the defective portion over the length range of the predetermined length or more. It is characterized in that the cutting device is controlled so as to cut to a length shorter than the discharge allowable length.
  • the corrugated cardboard sheet including the defective portion is cut into a short length over a length range equal to or longer than the predetermined length, the corrugated cardboard sheet including the defective portion can be properly discharged from the transport line.
  • the cutting device forms a plate-like corrugated cardboard sheet by cutting a continuous corrugated cardboard sheet to a predetermined first cutting length set in advance in the width direction.
  • the control device may be configured such that when the length of the plate-shaped corrugated cardboard sheet is longer than the allowable discharge length, the second cutting unit sets the cut length of the corrugated cardboard sheet including the defective portion to be an integer fraction of the first cut length. It is characterized by changing to long.
  • the cutting device cuts a continuous corrugated cardboard sheet to a first cutting length to form a plate-shaped corrugated cardboard sheet.
  • the continuous corrugated cardboard sheet has a defective portion, and the length of the plate-shaped corrugated cardboard sheet is Is longer than the discharge allowable length, the cutting length is changed to a second cutting length shorter than the first cutting length. Therefore, the corrugated cardboard sheet including the defective portion is cut shorter than the discharge allowable length, and can be easily discharged by the defective product discharge device.
  • the control device cuts the corrugated cardboard sheet including the defective portion by the second cutting length by the integer, and then changes the second cutting length to the first cutting length. It is characterized by doing.
  • the cutting device can cut a continuous corrugated cardboard sheet into a predetermined first cutting length to continuously form a plate-shaped corrugated cardboard sheet.
  • the controller changes the first cutting length to the second cutting length, if the corrugated cardboard sheet does not have the defective portion, the controller cuts the second cutting length to the first cutting length.
  • the feature is to change to the cutting length.
  • the cutting device can cut a continuous corrugated cardboard sheet into a predetermined first cutting length to continuously form a plate-shaped corrugated cardboard sheet.
  • the first liner has a cutting mark indicating a cutting position printed on a surface thereof, and a mark detection for detecting the cutting mark upstream of the cutting apparatus in the conveying direction of the cardboard sheet.
  • a device is provided, and the control device controls the operation of the cutting device at a position obtained by adding a preset margin length to the second cutting length when the cutting mark is not present at the position of the second cutting length. It is characterized by doing.
  • the control device controls the operation of the cutting device in accordance with the detection time of the cutting mark by the mark detecting device, and the continuous corrugated cardboard sheet is made to have the first cutting length. Disconnect.
  • the control device changes the first cut length to the second cut length when the corrugated cardboard sheet is in a defective portion and the length is longer than the discharge allowable length, but the cutting mark is located at the position of the second cut length. Since there is no margin, the corrugated cardboard sheet including the defective portion is cut at a position obtained by adding the extra length to the second cutting length. Therefore, the corrugated cardboard sheet including the defective portion is cut shorter than the discharge allowable length, and can be easily discharged by the defective product discharge device.
  • the control device controls a normal cutting mode for controlling the operation of the cutting device based on a first cutting length, and controls the operation of the cutting device based on the cutting mark.
  • a preprint cutting mode wherein the first cutting length is changed to the second cutting length when switching between the normal cutting mode and the preprint cutting mode.
  • the controller changes the mode from the first cutting length to the second cutting length when switching from the normal cutting mode to the preprint cutting mode or when switching from the preprint cutting mode to the normal cutting mode.
  • a corrugated cardboard sheet including a paper splicing portion generated at the time of switching can be cut short, and can be properly discharged by a defective product discharging device.
  • the defective portion is at least one of a paper spliced portion, a core deformed portion, a defective printing portion, a scratch, a stain, and an adhesive residue.
  • a corrugated cardboard sheet including a defective portion such as a paper spliced portion, a deformed core portion, or a defective printing portion can be appropriately cut into short pieces and discharged.
  • the method for removing defects of the sheet of the present invention is a step of cutting a double-faced corrugated cardboard sheet formed by laminating liners on both sides of a corrugated core to a predetermined length along a width direction.
  • the corrugated cardboard sheet including the defective portion is cut into a length shorter than the allowable discharge length. Then, the corrugated cardboard sheet including the defective portion becomes shorter than the allowable discharge length, and the corrugated cardboard sheet including the defective portion can be properly discharged from the transport line by the defective product discharging device. As a result, regardless of the length of the corrugated cardboard sheet, the defective corrugated cardboard sheet can be properly removed from the transport line to improve the working efficiency.
  • the corrugated cardboard sheet manufacturing apparatus may further include a single facer for manufacturing a single-sided corrugated cardboard sheet by bonding a second liner to the corrugated core, and a first liner on the single-sided corrugated cardboard sheet side. And a double facer for manufacturing a double-faced corrugated cardboard sheet, and a sheet defect removing device.
  • a single facer produces a single-sided corrugated cardboard sheet by laminating a second liner to the corrugated core, and a double facer provides a first liner on the central side of a single-sided corrugated cardboard sheet produced by a single facer.
  • the two-sided corrugated cardboard sheet is manufactured by laminating, and the cutting device cuts the two-sided corrugated cardboard sheet into a predetermined length along the width direction.
  • the control device discharges the corrugated cardboard sheet including the defective portion from the transport line by the defective product discharging device, but when the length of the plate-shaped corrugated cardboard sheet is longer than the discharge allowable length of the defective product discharging device, the control device causes the cutting device to operate.
  • the corrugated cardboard sheet including the defective portion becomes shorter than the allowable discharge length, and the corrugated cardboard sheet including the defective portion can be properly discharged from the transport line by the defective product discharging device.
  • the defective corrugated cardboard sheet can be properly removed from the transport line to improve the working efficiency.
  • seat defect removal apparatus and method of this invention and the manufacturing apparatus of a corrugated cardboard sheet, regardless of the length of a corrugated cardboard sheet, the sheet
  • FIG. 1 is a schematic diagram illustrating a corrugating machine as a corrugated sheet manufacturing apparatus according to the present embodiment.
  • FIG. 2 is a configuration diagram illustrating a sheet defect removing apparatus according to the present embodiment.
  • FIG. 3 is a schematic diagram illustrating a defective product discharging device.
  • FIG. 4 is a schematic diagram illustrating an operation of a cutoff in a normal state in the preprint cutting mode.
  • FIG. 5 is a schematic diagram showing a cutoff operation when a defective portion occurs in the preprint cutting mode.
  • FIG. 6 is a time chart showing the operation of the defect removing device when switching from the normal cutting mode to the preprint cutting mode.
  • FIG. 7 is a time chart showing the operation of the defect removing device in the preprint cutting mode.
  • FIG. 8 is a time chart showing the operation of the defect removing device when switching from the preprint cutting mode to the normal cutting mode.
  • FIG. 1 is a schematic view showing a corrugating machine as a corrugated cardboard sheet manufacturing apparatus of the present embodiment.
  • a corrugating machine 10 as a corrugated cardboard sheet manufacturing apparatus firstly attaches a back liner (second liner) C1 to a corrugated core B1 to form a single-sided corrugated cardboard sheet D1.
  • the front liner (first liner) A is attached to the core B1 of the manufactured single-sided cardboard sheet D1 to manufacture a continuous double-sided cardboard sheet E1.
  • a plate-like double-faced corrugated paperboard sheet F1 can be manufactured.
  • the corrugating machine 10 firstly manufactures the single-sided corrugated cardboard sheet D1 and also attaches the back liner (second liner) C2 to the corrugated core B2 to produce the single-sided corrugated cardboard sheet D2.
  • the back liner C2 of the single-sided cardboard sheet D2 is bonded to the center B1 of the manufactured single-sided cardboard sheet D1
  • the front liner (first liner) A is bonded to the center B2 of the single-sided cardboard sheet D2.
  • a plate-shaped double-sided corrugated cardboard sheet F2 can be manufactured.
  • the corrugating machine 10 includes a mill roll stand 11 for the 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 B2, and a mill for the back liner C2.
  • Roll stand 16 single facer 17, bridge 18, mill roll stand 19 of front liner A, preheater 20, glue machine 21, double facer 22, rotary shear 23, slitter scorer 24, cut-off (Cutting device) 25, defective product discharging device 26, and stacker 27.
  • Each of the mill roll stands 11 and 15 is provided with a roll paper in which the cores B1 and B2 are formed on both sides, respectively. Is provided. When paper is fed from one roll paper, the other roll paper is mounted and paper splicing preparation is performed. When one roll paper runs short, the other roll paper is replaced with the other roll paper. Be spliced. Therefore, paper is continuously fed downstream from each of the mill roll stands 11 and 15.
  • the mill roll stands 12 and 16 are provided with roll paper on each side of which the back liners C1 and C2 are wound in a roll shape, and a splicer 28 for splicing between the roll papers. .
  • a splicer 28 for splicing between the roll papers.
  • the other roll paper is mounted and paper splicing preparation is performed.
  • the other roll paper is replaced with the other roll paper. Be spliced. Therefore, the paper is continuously fed from each of the mill roll stands 12 and 16 to the downstream side.
  • the cores B1 and B2 fed from the mill roll stands 11 and 15 and the back liners C1 and C2 fed from the mill roll stands 12 and 16 are preheated by preheaters (not shown).
  • Each preheater has a heating roll into which steam is supplied, and heats the cores B1 and B2 and the back liners C1 and C2 to a predetermined temperature by being wound around the heating roll and transported.
  • the single facer 13 processes the heated core B1 into a corrugated shape, glues it to the top of each step, and attaches the heated back liner C1 to form a single-sided cardboard sheet D1.
  • the single facer 13 is provided with a pick-up conveyor at an obliquely upper portion on the downstream side in the transport direction, and transports the single-faced cardboard sheet D1 formed by the single facer 13 to the bridge 14.
  • the bridge 14 absorbs the speed difference between the single facer 13 and the double facer 22, so that the single-sided cardboard sheet D1 can temporarily stay.
  • the single facer 17 also processes the heated core B2 into a wavy shape, glues it to the top of each step, and attaches the heated back liner C2 to form a single-sided cardboard sheet D2.
  • the single facer 17 is provided with a pickup conveyor obliquely above the downstream side in the transport direction, and transports the single-faced cardboard sheet D2 formed by the single facer 17 to the bridge 18.
  • the bridge 18 absorbs the speed difference between the single facer 17 and the double facer 22, so that the single-faced cardboard sheet D2 can temporarily stay.
  • the mill roll stand 19 is provided with roll paper on each side of which the front liner A is wound in a roll shape, and is provided with a splicer 28 for splicing between the roll papers.
  • a splicer 28 for splicing between the roll papers.
  • the preheater 20 has three preheating rolls 31, 32, 33 arranged in a vertical direction.
  • the preheating roll 31 heats the front liner A
  • the preheating roll 32 heats the single-sided cardboard sheet D2
  • the preheating roll 33 heats the single-sided cardboard sheet D1.
  • Each of the preheating rolls 31, 32, and 33 has a winding amount adjusting device (not shown), and is supplied with steam and heated to a predetermined temperature. D2, the preheating can be performed by winding the single-sided corrugated cardboard sheet D1.
  • the glue machine 21 has gluing rolls 34 and 35 arranged in a vertical direction.
  • the gluing roll 34 performs gluing by contacting each top of the core B2 in the single-sided corrugated cardboard sheet D2 heated by the preheating roll 32.
  • the gluing roll 35 performs gluing by contacting each top of the core B1 in the single-sided corrugated cardboard sheet D1 heated by the preheating roll 33.
  • the single-faced cardboard sheets D1 and D2 glued by the glue machine 21 are transferred to the double facer 22 in the next step.
  • the front liner A heated by the preheating roll 31 is also transferred to the double facer 22 through the glue machine 21.
  • the double facer 22 has an upstream heating section 36 and a downstream cooling section 37 along the single-sided corrugated cardboard sheets D1 and D2 and the running line of the front liner A.
  • the single-sided corrugated cardboard sheets D1 and D2 and the front liner A glued by the glue machine 21 are carried between the pressure belt and the hot plate in the heating section 36, and are integrally cooled while overlapping each other. Transported to section 37. During this transfer, the single-faced corrugated cardboard sheets D1 and D2 and the front liner A are heated while being pressurized to be bonded to each other to form a continuous double-faced corrugated cardboard sheet E2, which is then naturally cooled while being conveyed.
  • the double-faced cardboard sheet E2 (double-faced cardboard sheet E1) manufactured by the double facer 22 is transferred to the rotary shear 23.
  • This rotary shear 23 cuts the full width or partial cut of the double-faced corrugated cardboard sheet E2 in the width direction when the lamination is stabilized in the initial stage of operation.
  • the slitter scorer 24 cuts the wide double-sided double-faced corrugated cardboard sheet E2 along the transport direction so as to have a predetermined width, and processes a ruled line extending in the transport direction.
  • the slitter scorer 24 includes a first slitter scorer unit 38 and a second slitter scorer unit 39 which are arranged along the conveying direction of the double-sided corrugated cardboard sheet E2 and have substantially the same structure.
  • the wide double-faced corrugated cardboard sheet E2 is cut by the slitter scorer 24 to form a double-faced double-faced corrugated cardboard sheet E2.
  • the cut-off 25 cuts the double-sided corrugated cardboard sheet E2 cut in the conveying direction by the slitter scorer 24 along the width direction to form a plate-shaped double-sided corrugated cardboard sheet F2 (double-sided corrugated cardboard sheet F1) having a predetermined length.
  • the defective product discharge device 26 discharges the double-sided double-faced corrugated paperboard sheet F2 detected as a defective product from the transport line. Factors that cause defective products include, for example, poor splicing, deformation of the core, scratches, dirt, and adhesion of glue residue.
  • the stacker 27 is for stacking the double-sided double-faced corrugated cardboard sheet F2 determined as a non-defective product and discharging it as a product outside the machine.
  • the corrugating machine 10 of the present embodiment is capable of manufacturing a plate-shaped double-sided corrugated cardboard sheet F1 and a plate-shaped double-sided corrugated cardboard sheet F2.
  • the cutting process and the cutting process described below are almost the same operation process. Therefore, in the following description, the continuous double-sided corrugated cardboard sheet E1 and the continuous double-sided corrugated cardboard sheet E2 are represented as a continuous double-sided corrugated cardboard sheet E, and the plate-shaped double-sided corrugated cardboard sheet F1 and the plate-shaped double-sided corrugated cardboard sheet F2 are referred to as plate-shaped. Expressed as a double-faced cardboard sheet F.
  • the corrugating machine 10 finally forms the plate-like double-faced corrugated paperboard sheet F by cutting the double-faced corrugated paperboard sheet E having the continuous cutoff 25 to a predetermined cutting length.
  • the sheet defect removing device discharges the plate-shaped double-faced corrugated cardboard sheet F including the defective portion detected in the manufacturing process of the plate-shaped double-faced corrugated cardboard sheet F as a defective product from the transport line by the defective product discharging device 26.
  • the discharge allowable length of the plate-shaped double-faced corrugated cardboard sheet F is set for reasons such as structure or arrangement space, and the plate-shaped double-faced corrugated cardboard sheet longer than the discharge allowable length. F cannot be discharged. Therefore, in the present embodiment, the double-faced corrugated cardboard sheet E including the defective portion is cut into a plurality of sheets shorter than the discharge allowable length and discharged.
  • FIG. 2 is a configuration diagram illustrating a sheet defect removing device according to the present embodiment
  • FIG. 3 is a schematic diagram illustrating a defective product discharging device.
  • a sheet defect removing apparatus 50 of the present embodiment is a plate-shaped double-faced corrugated cardboard formed by bonding a front liner A, corrugated cores B1, B2 and back liners C1, C2. This is to remove defective products of the sheet F (F1, F2).
  • the sheet defect removing device 50 includes a cutoff 25 as a cutting device, a paper spliced portion detecting device 51 (51a, 51b, 51c, 51d, 51e) as a defect detecting device, and a single-stage defect detecting device 52 (52a, 52b). , A quality inspection device 53 (53a, 53b), a failure detection switch 54 (54a, 54b), a defective product discharging device 26, a control device 55, and a cutoff control device 56.
  • the cutoff 25 cuts the double-faced corrugated cardboard sheet E along the width direction to form a plate-shaped double-faced corrugated cardboard sheet F having a predetermined cutting length.
  • the cutoff 25 has a conveyor 61 and a pair of upper and lower cutting rolls 62 and 63. Therefore, the cut-off 25 forms the plate-shaped double-faced corrugated paperboard sheet F by cutting the double-faced corrugated paperboard sheet E transported by the transport conveyor 61 by the pair of upper and lower cutting rolls 62 and 63.
  • the defective product discharging device 26 discharges a plate-shaped double-faced corrugated cardboard sheet F including a defective portion from the transport line.
  • the defective product discharging device 26 includes a first transport conveyor 64, a second transport conveyor 65, a first discharge conveyor 66, a second discharge conveyor 67, and a distribution roll 68.
  • the first transport conveyor 64 has a horizontal transport section 64a and a downward transport section 64b, and receives and transports a plate-shaped double-faced cardboard sheet F cut at the cutoff 25.
  • the second transport conveyor 65 is arranged continuously downstream of the horizontal transport section 64a in the first transport conveyor 64, and receives and transports a plate-shaped double-faced cardboard sheet F transported as a non-defective product.
  • the first discharge conveyor 66 is arranged continuously downstream of the downward conveying portion 64b of the first conveying conveyor 64, and receives and conveys a plate-shaped double-faced cardboard sheet F0 discharged as a defective product.
  • the second discharge conveyor 67 is arranged continuously downstream of the first discharge conveyor 66, and receives and transports a plate-shaped double-faced corrugated cardboard sheet F0 discharged as a defective product.
  • the second discharge conveyor 67 conveys and discharges the plate-shaped double-faced corrugated cardboard sheet F0 along a horizontal direction intersecting the conveyance line of the plate-shaped double-faced corrugated cardboard sheet F.
  • the distribution roll 68 is disposed above the first transport conveyor 64 between the horizontal transport section 64a and the downward transport section 64b.
  • the distribution roll 68 is vertically movable. Therefore, when the plate-shaped double-faced corrugated cardboard sheet F determined to be non-defective is conveyed, the distribution roll 68 is made to stand by at the rising position, so that the non-defective plate-shaped double-faced corrugated cardboard sheet F is transported from the horizontal conveying section 64a to the second conveying section 64a. It is transported to the transport conveyor 65.
  • the distribution roll 68 is lowered to move the defective plate-shaped double-faced corrugated cardboard sheet F0 from the horizontal conveying section 64a to the downward conveying section. 64b, and discharged using the first discharge conveyor 66 and the second discharge conveyor 67.
  • the stacker 27 is for stacking plate-shaped double-faced corrugated cardboard sheets F determined to be non-defective and discharging them as products to the outside of the machine.
  • the stacker 27 has a plurality of conveyors 69, 70, 71 and a stacking stand (not shown).
  • the non-defective plate-shaped double-faced corrugated cardboard sheets F are sent to the stacker 27, stacked and conveyed by the conveyors 69, 70, 71, and then stacked on the stacking table.
  • the corrugating machine 10 of the present embodiment can manufacture a plate-shaped double-faced corrugated cardboard sheet F using a preprint liner.
  • the preprint liner has a predetermined pattern, character, or the like printed on the surface in advance, and the preprint liner is used as the front liner A.
  • the front liner A (preprint liner) has not only pictures and characters but also a cutting mark indicating a cutting position printed on the surface. Therefore, the mark detection device 75 is disposed upstream of the cutoff 25 in the transport direction of the plate-shaped double-faced corrugated cardboard sheet F.
  • the mark detection device 75 includes a support base 76 and a mark sensor 77 mounted on the support base 76.
  • the front liner A is located on the lower surface side of the plate-shaped double-faced corrugated cardboard sheet F to be conveyed, and the cutting mark is printed on the front surface (lower surface). Is arranged to face the lower surface side.
  • the spliced portion detection device 51 (51a, 51b, 51c, 51d, 51e), the single-stage defect detection device 52 (52a, 52b), and the quality inspection device 53 (53a, 53b) as the above-described defect detection device.
  • the failure detection switch 54 (54a, 54b) will be described.
  • the spliced portion detecting device 51 is disposed on the splicer 28, and the splicer 28 is formed of paper of the front liner A, the core B (B1, B2), and the back liner C (C1, C2). The splicing is detected, and a sheet splicing signal is output to the control device 55.
  • the control device 55 controls the conveying speed of the front liner A, the core B, and the back liner C, the conveying distance from the splicing position to the cutoff 25, and From this, the time required for the paper spliced portion as the defective portion to reach the cutoff 25 is calculated. Further, the control device 55 similarly calculates the arrival time from the cutoff 25 to the defective product discharging device 26.
  • the single-stage failure detection device 52 is disposed in the preheater 20 or the glue machine 21.
  • the single-stage defect detection device 52 detects the deformation of the core B in the single-sided cardboard sheet D formed by attaching the corrugated core B to the back liner C.
  • the one-stage defect detection device 52 includes, for example, an imaging device, and compares the captured image of the core B which is a good product with the captured image of the core B being conveyed, which is captured by the imaging device.
  • the quality of the single-faced cardboard sheet D is determined by detecting the deformation of B.
  • the single-stage defect detection device 52 outputs a pass / fail judgment signal of the single-sided cardboard sheet D to the control device 55.
  • the control unit 55 cuts the defective portion based on the transport speed of the single-sided corrugated cardboard sheet D and the transport distance from the single-stage defect detection device 52 to the cutoff 25 based on the pass / fail judgment signal input from the single-stage defect detection device 52.
  • the time to reach OFF 25 is calculated. Further, the control device 55 similarly calculates the arrival time from the cutoff 25 to the defective product discharging device 26.
  • the quality inspection device 53 is disposed between the slitter scorer 24 and the cutoff 25 above and below the plate-shaped double-faced corrugated cardboard sheet F to be conveyed.
  • the quality inspection device 53 includes, for example, an imaging device, and inspects the shape and dimensions of the plate-shaped double-faced corrugated cardboard sheet F and the printing state when a preprint liner is used, based on an image captured by the imaging device. Specifically, by comparing a non-defective plate-shaped double-faced corrugated cardboard sheet F with a photographed image of the plate-shaped double-faced corrugated cardboard sheet F being conveyed captured by the imaging device, the plate-shaped double-faced corrugated cardboard sheet F is compared. Is determined.
  • the control device 55 determines the defective portion based on the transport speed of the plate-shaped double-faced corrugated cardboard sheet F and the transport distance from the quality inspection device 53 to the cutoff 25. The time to reach the cutoff 25 is calculated. Further, the control device 55 similarly calculates the arrival time from the cutoff 25 to the defective product discharging device 26.
  • the failure detection switch 54 is arranged around the slitter scorer 24 and the cutoff 25.
  • the defect detection switch 54 is operable by an operator, and is operated when a defective portion (for example, a scratch, dirt, or adhesive residue) is found on the double-faced cardboard sheets E and F being conveyed by the operator.
  • the control device 55 calculates the time required for the defective portion to reach the cutoff 25 in the same manner as described above, based on the defective portion detection signal input from the defect detection switch 54. Further, the control device 55 similarly calculates the arrival time from the cutoff 25 to the defective product discharging device 26.
  • the control device 55 operates the defective product discharging device 26 according to the detection results of the paper spliced portion detection device 51, the single-stage defect detection device 52, the quality inspection device 53, and the defect detection switch 54 as the defect detection devices.
  • the control device 55 is configured to output a splicing signal from the splicing portion detection device 51, a pass / fail judgment signal from the one-stage defect detection device 52 or the quality inspection device 53, and a defective portion detection signal from the defect detection switch 54, The time required for the defective portion to reach the cutoff 25 is calculated. Further, the control device 55 calculates the arrival time from the cutoff 25 to the defective product discharging device 26. Therefore, when the defective portion reaches the defective product discharging device 26, the control device 55 operates the defective product discharging device 26 to discharge the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion to the outside from the transport line.
  • the control device 55 When the length L of the plate-shaped double-faced corrugated cardboard sheet F0 is longer than the allowable discharge length Ld of the defective product discharging device 26, the control device 55 outputs the continuous double-sided corrugated cardboard sheet E including the defective portion to the allowable discharge length.
  • the cutoff 25 is controlled so as to cut to a length shorter than Ld. That is, the defective product discharging device 26 sends the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion from the first transport conveyor 64 to the first discharge conveyor 66 by the distribution roll 68, and orthogonally intersects the transport line with the first discharge conveyor 66. And discharged to the outside by the second discharge conveyor 67.
  • the second discharge conveyor 67 conveys the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion in the direction perpendicular to the paper surface of FIG. 3, and has a discharge allowable length Ld set in the width direction. Therefore, if the cut length L of the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion due to the cut-off 25 is longer than the discharge allowable length Ld, the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion by the second discharge conveyor 67 as it is. Cannot be discharged outside.
  • the continuous double-faced corrugated cardboard sheet E including the defective portion is cut into a length shorter than the allowable discharge length Ld. That is, the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion longer than the discharge allowable length Ld is cut into a plurality of sheets by the cutoff 25 and discharged.
  • FIG. 4 is a schematic diagram illustrating a normal cutoff operation in the preprint cutting mode
  • FIG. 5 is a schematic diagram illustrating a cutoff operation when a defective portion occurs in the preprint cutting mode.
  • the preprint cutting mode is a method in which a plate-shaped double-faced corrugated cardboard sheet F is used as a front liner A using a preprint liner on which a cutting mark M is printed on the surface together with a pattern or character.
  • the mark detecting device 75 detects the cutting mark M printed on the lower surface side of the plate-shaped double-faced corrugated cardboard sheet F by the mark sensor 77 and sends a mark detection signal to the cut-off control device 56. Is output.
  • the cutoff control device 56 determines a cutting mark of the continuous double-faced cardboard sheet E based on the transport speed of the continuous double-faced cardboard sheet E and the transport distance from the mark detection device 75 to the cutoff 25.
  • the time required for M to reach the cutting position by the cutoff 25 is calculated, and the cutting position is controlled at the position of the cutting mark M by controlling the rotational direction position of the knife cylinder that cuts the double-faced cardboard sheet F.
  • the cut length by the cutoff 25 is the first cut length L.
  • the continuous double-faced corrugated cardboard sheet E is printed with the cutting mark M for each first cutting length L. Therefore, the cutoff control device 56 activates the cutoff 25 at a predetermined timing based on the mark detection signal from the mark detection device 75, and cuts (cuts) the continuous double-faced cardboard sheet E at the position of the cutting mark M. Line CL).
  • the cutoff control device 56 knows the length of the first cutting length L in advance, so that the cutoff control device 56 prevents The cutoff 25 is operated at a length obtained by adding the margin length Lm to the cutting length L, and the continuous double-faced corrugated cardboard sheet E is cut.
  • the control device 55 changes the cutting length from the first cutting length L to half of the first cutting length L (an integer n). It is changed to the second cutting length L / 2, which is (1/1).
  • the integer is a natural number, excluding “0”.
  • the defective product discharging device 26 discharges a plate-shaped double-faced corrugated cardboard sheet F0 having a length of 1700 mm from the transport line. Can not.
  • the cutting length is changed from the first cutting length L to the second cutting length L / 2. Since the half of the first cutting length L (1700 mm) is 850 mm, which is equal to or less than the discharge allowable length Ld, the second cutting length is set to one half of the first cutting length L.
  • the second cut length is set to one third of the first cut length L.
  • the cutoff control device 56 operates the cutoff 25 at a predetermined timing based on the mark detection signal from the mark detection device 75 and the paper splice signal from the paper splice portion detection device 51. That is, when the defective portion Pf reaches the cutoff 25, the control device 55 instructs the cutoff control device 56 to change the first cut length L (1700 mm) to the second cut length L / 2 (850 mm). I do.
  • the cut-off control device 56 operates the cut-off 25 and at a position separated by a second cutting length L / 2 (850 mm) from the position of the cutting mark M obtained by cutting the double-faced corrugated cardboard sheet E where the cut-off 25 is continuous. An attempt is made to cut a continuous double-faced cardboard sheet E.
  • the cut-off control device 56 has a margin Lm in the second cutting length L / 2 to avoid not cutting.
  • the cut-off 25 is operated at the length (860 mm) to which (for example, 10 mm) is added, and the continuous double-faced corrugated cardboard sheet E is cut.
  • the controller 55 cuts again at the cutting mark M in the preprint mode, so that the length of the defective portion n times the second cutting length (twice when the second cutting length L / 2) is used. If the sheet is not continuously conveyed, the cutting length of the continuous double-faced cardboard sheet E is changed from the second cutting length L / 2 to the first cutting length L. Then, the cutoff control device 56 activates the cutoff 25 at a predetermined timing based on the mark detection signal from the mark detection device 75, and cuts (cuts) the continuous double-faced corrugated cardboard sheet E at the position of the cutting mark M. Line CL).
  • the cutting length at this time is , The length obtained by subtracting the margin length Lm (for example, 10 mm) from the second cut length L / 2 (840 mm).
  • FIG. 6 is a time chart showing the operation of the defect removing device when switching from the normal cutting mode to the preprint cutting mode
  • FIG. 7 is a time chart showing the operation of the defect removing device in the preprint cutting mode
  • FIG. 6 is a time chart illustrating an operation of the defect removing device when switching from a preprint cutting mode to a normal cutting mode.
  • the sheet defect removing method of the present embodiment is a method of forming a continuous double-faced corrugated cardboard sheet E formed by laminating liners A and C on both sides of a corrugated core B to a predetermined length along a width direction. Cutting to a length L, detecting a defective portion Pf of the double-faced corrugated cardboard sheets E and F, and including the defective portion Pf when the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld.
  • the control device 55 has a normal cutting mode for operating the cutoff 25 based on the first cutting length and a preprint cutting mode for operating the cutoff 25 based on the cutting mark M, and is switchable.
  • the normal cutting mode is a mode in which a plate-like double-faced corrugated cardboard sheet F is manufactured using a normal liner having no surface pattern, characters, or cutting marks M printed thereon as the front liner A.
  • the control device 55 inputs the first cutting length of the plate-shaped double-faced corrugated cardboard sheet F, and cuts from the transport speed of the continuous double-faced corrugated cardboard sheet E based on the first cutting length. Calculate the position.
  • the front liner A is spliced from the plain normal liner to the printed preprint liner.
  • the portion becomes a defective portion Pf, and a plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion Pf is generated.
  • the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld.
  • the cutoff 25 is activated for each first cutting length L1. I do.
  • a cut completion signal is output from the cutoff 25 to the cutoff control device 56 at the timing when the double-faced corrugated cardboard sheet E having the continuous cutoff 25 is cut.
  • the control device 55 knows when the defective portion (paper spliced portion) Pf reaches the cutoff 25, and one cycle before the timing when the defective portion Pf reaches the cutoff 25, and has a predetermined length.
  • the cutting length is switched from the first cutting length L1 to the second cutting length LW (L1 / 2) over the range La. Note that one cycle is a length at which the cutoff 25 cuts one plate-shaped double-faced corrugated cardboard sheet F with the first cutting length L1.
  • the cutoff 25 is switched from the first cutting length L1 to the second cutting length LW, and the continuous double-faced corrugated cardboard sheet E having the defective portion Pf is cut.
  • a second cutting length LW over a predetermined length range La.
  • the cutoff 25 cuts the continuous double-faced corrugated cardboard sheet E at the first cut length L1, and then cuts the double-faced corrugated cardboard sheet E with the second cut length LW1 (L1 / 2 + Lm) and the second cut length LW2 (L1 / 2- Lm), the second cut length LW1 (L1 / 2 + Lm), and the second cut length LW2 (L1 / 2-Lm).
  • the cutting mode is switched to the preprint cutting mode, and the preprint cutting mode signal is turned on.
  • the cutoff 25 operates at the position of the cutting mark M to cut the continuous double-faced cardboard sheet E.
  • the continuous double-faced corrugated cardboard sheet E does not have the cutting mark M from the position cut by the first cutting length L1 to the position of the second cutting length LW1. Therefore, the cutoff control device 56 operates the cutoff 25 at the position of the second cutting length LW1 obtained by adding the margin length Lm to the second cutting length LW, and cuts the continuous double-faced cardboard sheet E. Thereafter, the cutoff controller 56 operates the cutoff 25 at the position of the cutting mark M to cut the continuous double-faced corrugated cardboard sheet E.
  • the cutting length at this time is the second cutting length LW2 obtained by subtracting the margin length Lm from the second cutting length LW.
  • the control device 55 After switching the cutting length from the first cutting length L1 to the second cutting length LW, the control device 55 operates the defective product discharging device 26 to turn on the defective product discharging process.
  • the continuous double-faced corrugated cardboard sheet E is conveyed, and the cutting length is switched from the second cutting length LW to the first cutting length L2 one cycle before reaching the predetermined length range La.
  • the cutoff control device 56 operates the cutoff 25 at the position of the cutting mark M to cut the continuous double-faced corrugated cardboard sheet E by the first cutting length L2.
  • the control device 55 stops the operation of the defective product discharging device 26 and turns off the defective product discharging process.
  • the pass / fail judgment signal is transmitted from the one-stage defect detection device 52 or the quality inspection device 53.
  • a plate-shaped double-faced cardboard sheet F0 including the defective portion Pf is generated.
  • the preprint cutting mode signal is ON, the first cutting length L2 of the plate-shaped double-faced corrugated cardboard sheet F is set, and the cutoff 25 operates at the position of the cutting mark M.
  • a cut completion signal is output from the cutoff control device 56 to the control device 55 at the timing when the double-faced corrugated cardboard sheet E having the continuous cutoff 25 is cut.
  • the controller 55 knows when the defective portion Pf reaches the cutoff 25, and cuts over a predetermined length range Lb one cycle before the timing when the defective portion Pf reaches the cutoff 25.
  • the length is switched from the first cut length L2 to the second cut length LW (L2 / 2).
  • the cutoff 25 is switched from the second cutting length L2 to the second cutting length LW, and the defective portion Pf Is cut at a second cutting length LW over a predetermined length range Lb. That is, the cut-off 25 cuts the continuous double-faced corrugated cardboard sheet E at the first cut length L2, and then cuts the double-faced corrugated cardboard sheet E with the second cut length LW1 (L1 / 2 + Lm) and the second cut length LW2 (L1 / 2- Lm), the second cut length LW1 (L1 / 2 + Lm), and the second cut length LW2 (L1 / 2-Lm).
  • the continuous double-faced corrugated cardboard sheet E does not have the cutting mark M at the position of the second cutting length LW from the position cut by the first cutting length L2. Therefore, the cutoff control device 56 operates the cutoff 25 at the position of the second cutting length LW1 obtained by adding the margin length Lm to the second cutting length LW, and cuts the continuous double-faced cardboard sheet E. Thereafter, the cutoff controller 56 operates the cutoff 25 at the position of the cutting mark M to cut the continuous double-faced corrugated cardboard sheet E. The cutting length at this time is the second cutting length LW2 obtained by subtracting the margin length Lm from the second cutting length LW.
  • the cut-off control device 56 determines the position of the second cut length LW1 obtained by adding the margin Lm to the second cut length LW, and the margin Lm from the second cut length LW for the continuous double-faced corrugated cardboard sheet E.
  • the cut-off 25 is operated at the position of the second cutting length LW2 from which is subtracted, and the continuous double-faced corrugated cardboard sheet E is cut.
  • the control device 55 After switching the cutting length from the first cutting length L2 to the second cutting length LW1, the control device 55 operates the defective product discharging device 26 to turn on the defective product discharging process.
  • the continuous double-faced corrugated cardboard sheet E is conveyed, and the cut length is switched from the second cut length LW to the first cut length L2 one cycle before reaching the predetermined length range Lb.
  • the cutoff control device 56 operates the cutoff 25 at the position of the cutting mark M to cut the continuous double-faced corrugated cardboard sheet E by the first cutting length L2.
  • the control device 55 stops the operation of the defective product discharging device 26 and turns off the defective product discharging process.
  • the control device 55 switches the cutting to the normal cutting after cutting the defective portion, and the length (LW ⁇ n ⁇ m: m is the length of the defective portion Pf) of n times the second cutting length.
  • the cutoff 25 operates again at the position of the cutting mark M by performing cutting (an integer obtained by rounding up a quotient obtained by dividing the range Lb by the first cutting length L).
  • the front liner A when switching from the preprint cutting mode to the normal cutting mode, the front liner A is spliced from the printed preprint liner to the plain normal liner.
  • the spliced portion becomes a defective portion Pf, and a plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion Pf is generated.
  • the preprint cutting mode signal When the cutting mode is the preprint cutting mode, the preprint cutting mode signal is ON, the first cutting length L2 of the plate-shaped double-faced corrugated cardboard sheet F is set, and the cutoff 25 operates at the position of the cutting mark M. To cut the continuous double-faced cardboard sheet E. At this time, a cut completion signal is output from the cutoff control device 56 to the control device 55 at the timing when the double-faced corrugated cardboard sheet E having the continuous cutoff 25 is cut. The controller 55 knows the time when the defective portion Pf reaches the cutoff 25, and cuts over a predetermined length range Lc one cycle before the time when the defective portion Pf reaches the cutoff 25. The length is switched from the first cutting length L2 to the second cutting length LW (L2 / 2), the cutting mode is switched to the normal cutting mode, and the preprint cutting mode signal is turned off.
  • the cutoff 25 is switched from the first cutting length L2 to the second cutting length LW, and the defective portion Pf Is cut at a second cutting length LW over a predetermined length range Lc. That is, the cut-off 25 cuts the continuous double-faced corrugated cardboard sheet E at the first cut length L2, and then cuts the double-faced corrugated cardboard sheet E with the second cut length LW (L2 / 2) and the second cut length LW (L2 / 2).
  • the cutoff control device 56 activates the cutoff 25 when the first cutting length L2 is switched to the second cutting length LW, and the continuous double-faced corrugated cardboard sheet is cut. E is cut twice with the second cutting length LW. After switching the cutting length from the first cutting length L2 to the second cutting length LW, the control device 55 operates the defective product discharging device 26 to turn on the defective product discharging process.
  • the continuous double-faced corrugated cardboard sheet E is conveyed, and the cut length is switched from the second cut length LW to the first cut length L3 one cycle before reaching the predetermined length range Lc.
  • the cutoff control device 56 operates the cutoff 25 for each first cutting length L3 to cut the continuous double-faced corrugated cardboard sheet E at the first cutting length L3.
  • the controller 55 stops the operation of the defective product discharging device 26 and turns off the defective product discharging process.
  • the cutoff (cutting device) 25 that cuts the continuous double-faced corrugated cardboard sheet E along the width direction, and the defective portion Pf of the double-faced corrugated cardboard sheets E and F Part detecting device 51, a single-stage defect detecting device 52, a quality inspection device 53, a defect detecting switch 54, and a plate-shaped double-faced corrugated cardboard sheet F including a defective portion Pf are discharged from the transport line.
  • the defective discharge device 26 and the defective discharge device 26 are operated in accordance with the detection result of the defect detection device, and the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld of the defective discharge device 26.
  • the control device 55 activates the cutoff 25 when the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld of the defective product discharge device 26, and the double-faced corrugated cardboard sheet E including the defective portion Pf. Is cut to a length shorter than the allowable discharge length Ld. Then, the double-faced corrugated cardboard sheet F0 including the defective portion Pf becomes shorter than the discharge allowable length Ld, and the double-faced corrugated cardboard sheet F0 including the defective portion Pf can be properly discharged from the transport line by the defective product discharging device 26. As a result, regardless of the length of the double-faced corrugated paperboard sheet F, the defective double-faced corrugated paperboard sheet F0 can be properly removed from the transport line to improve the working efficiency.
  • the control device 55 moves the double-faced corrugated cardboard sheet F including the defective portion Pf to a predetermined length L.
  • the cut-off 25 is operated so as to cut to a length shorter than the allowable discharge length Ld over the above length ranges La, Lb, Lc. Therefore, the double-faced corrugated cardboard sheet F including the defective portion Pf is cut into a short length over the length range La, Lb, Lc that is equal to or longer than the predetermined length L.
  • the cut-off 25 cuts the continuous double-faced corrugated cardboard sheet E to a predetermined first cutting length L set in advance in the width direction to form a plate-shaped double-faced corrugated cardboard sheet.
  • the controller 55 sets the cut length of the double-faced corrugated cardboard sheet F including the defective portion Pf to the first cut.
  • the length is changed to the second cut length L / n, which is an integer fraction of the length L.
  • the cut-off 25 cuts the continuous double-faced cardboard sheet E to the first cutting length L to form a plate-like double-faced cardboard sheet F, and the continuous double-faced cardboard sheet E has a defective portion Pf, and
  • the cutting length is changed to the second cutting length L / n shorter than the first cutting length L. Therefore, the double-faced corrugated cardboard sheet F0 including the defective portion Pf is cut shorter than the discharge allowable length Ld, and can be easily discharged by the defective product discharge device 26.
  • the control device 55 cuts the double-faced corrugated cardboard sheet E including the defective portion Pf by the second cutting length L / n by an integer, and then cuts the second cutting length L / n from the second cutting length L / n. Change to one cutting length L. Therefore, after the double-faced corrugated cardboard sheet E including the defective portion Pf is cut shorter than the discharge allowable length Ld and discharged, the second cut length L / n is returned to the first cut length L. Therefore, the cut-off 25 can cut the continuous double-faced corrugated cardboard sheet E to a predetermined first cutting length L to continuously form the plate-shaped double-faced corrugated cardboard sheet F.
  • the controller 55 changes the first cutting length L to the second cutting length L / n, and then, when there is no defective portion Pf in the double-faced corrugated cardboard sheet F, performs the second cutting.
  • the length L / n is changed to the first cutting length L. Therefore, after the double-faced corrugated paperboard sheet F0 including the defective portion Pf is cut short and discharged, when the double-faced corrugated paperboard sheet F has no defective portion Pf, the double cut length L / n is returned to the first cut length L. Therefore, the cut-off 25 can cut the continuous double-faced corrugated cardboard sheet E to a predetermined first cutting length L to continuously form the plate-shaped double-faced corrugated cardboard sheet F.
  • the front liner A is a preprint liner on which a cutting mark M indicating a cutting position is printed on the surface, and detects the cutting mark M upstream of the cutoff 25.
  • a mark detecting device 75 is provided, and when the cutting mark M is not present at the position of the second cutting length L / n, the control device 55 determines a position obtained by adding a preset margin length Lm to the second cutting length L / n. The cut-off 25 is activated. Therefore, the control device 55 changes the first cut length L to the second cut length L / n when the double-faced corrugated cardboard sheet F is at the defective portion Pf and the length L is longer than the discharge allowable length Ld.
  • the double-faced corrugated cardboard sheet F including the defective portion Pf is cut at a position obtained by adding the margin length Lm to the second cutting length L / n. Therefore, the double-faced corrugated cardboard sheet F0 including the defective portion Pf is cut shorter than the discharge allowable length Ld, and can be easily discharged by the defective product discharge device 26.
  • the control device 55 controls the operation of the cutoff 25 based on the first cutting length L in the normal cutting mode and the operation of the cutoff 25 based on the cutting mark M. It has a preprint cutting mode to be controlled, and changes from the first cutting length L to the second cutting length L / n when switching between the normal cutting mode and the preprint cutting mode. Therefore, the control device 55 changes the first cutting length L to the second cutting length L / n when switching from the normal cutting mode to the preprint cutting mode or when switching from the preprint cutting mode to the normal cutting mode. Therefore, the double-faced corrugated cardboard sheet F0 including the paper spliced portion generated at the time of mode switching can be cut short, and can be properly discharged by the defective product discharging device 26.
  • the defective portion Pf is at least one of a paper spliced portion, a core deformed portion, a defective printing portion, a scratch, and a stain. Therefore, the double-faced corrugated cardboard sheet F including the defective portion Pf such as the paper spliced portion, the core deformed portion, or the defective printing portion can be cut appropriately and discharged.
  • a double-faced cardboard sheet E formed by laminating liners A and C on both sides of a corrugated core B is preset along the width direction. Cutting the defective portion Pf to a predetermined length L, detecting a defective portion Pf of the double-faced corrugated cardboard sheet, and removing the defective portion Pf when the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the discharge allowable length Ld. And a step of discharging the plate-shaped double-faced corrugated cardboard sheet F0 cut to a length shorter than the discharge allowable length Ld from the transport line. .
  • the control device 55 activates the cutoff 25 when the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld of the defective product discharge device 26, and the double-faced corrugated cardboard sheet E including the defective portion Pf. Is cut to a length shorter than the allowable discharge length Ld. Then, the double-faced corrugated cardboard sheet E including the defective portion Pf becomes shorter than the discharge allowable length Ld, and a person capable of properly discharging the double-faced corrugated cardboard sheet F including the defective portion Pf from the transport line by the defective product discharging device 26 can be obtained. As a result, regardless of the length of the double-faced corrugated paperboard sheet F, the defective double-faced corrugated paperboard sheet F0 can be properly removed from the transport line to improve the working efficiency.
  • the single facers 13 and 17 for manufacturing the single-sided corrugated cardboard sheet D by bonding the back liner C to the corrugated core B and the single facer 13 , 17 are provided with a double facer 22 for bonding the front liner A to the core B side of the single-faced cardboard sheet D to produce a double-faced cardboard sheet E, and a sheet defect removing device 50.
  • the single facers 13 and 17 produce the single-faced corrugated cardboard sheet D by laminating the back liner C to the corrugated core B, and the double facer 22 constitutes the single-faced corrugated cardboard sheet produced by the single facers 13 and 17.
  • the front liner A is attached to the core B side of D to produce a double-faced cardboard sheet E, and the cutoff 25 cuts the double-faced cardboard sheet E into a predetermined length along the width direction.
  • the control device 55 discharges the double-faced corrugated cardboard sheet F including the defective portion Pf from the transport line by the defective product discharge device 26.
  • the cutoff 25 is operated to cut the double-faced corrugated cardboard sheet E including the defective portion Pf into a length shorter than the permissible discharge length Ld. Then, the double-faced corrugated cardboard sheet F0 including the defective portion Pf becomes shorter than the discharge allowable length Ld, and the double-faced corrugated cardboard sheet F0 including the defective portion Pf can be properly discharged from the transport line by the defective product discharging device 26. As a result, regardless of the length of the double-faced corrugated paperboard sheet F, the defective double-faced corrugated paperboard sheet F0 can be properly removed from the transport line to improve the working efficiency.
  • the defective product discharge device 26 includes the first transport conveyor 64, the second transport conveyor 65, the first discharge conveyor 66, the second discharge conveyor 67, and the distribution roll 68.
  • the present invention is not limited to this configuration.
  • a defective storage basket or the like may be provided instead of the second discharge conveyor 67.
  • the cutting device is the cutoff 25, but is not limited to this configuration.
  • a cutting device may be provided separately from the cutoff 25.
  • the corrugating machine 10 manufactures a double-sided corrugated cardboard sheet by laminating the single-sided corrugated cardboard sheet D1, the single-sided corrugated cardboard sheet D2, and the front liner A.
  • the single-sided corrugated cardboard sheet D2 (D1) A double-sided corrugated cardboard sheet may be manufactured by laminating the sheet liner A with the front liner A.
  • control device of the present invention includes the control device 55 and the cutoff control device 56.
  • a single control device may be provided by sharing functions.

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  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

Provided are an apparatus and a method for eliminating a defect from a corrugated cardboard sheet, and a corrugated cardboard sheet manufacturing apparatus provided with: a cutoff (25) that cuts off a continuous double-sided corrugated cardboard sheet (E) along a width direction; a sheet joint detection apparatus (51), a single-faced defect detection apparatus (52), a quality examination apparatus (53), and a defect detection switch (54) which serve as a defect detection apparatus for detecting a defect part (Pf) of the double-sided corrugated cardboard sheet (E, F); a defective discharge apparatus (26) that discharges the plate-shaped double-sided corrugated cardboard sheet (F) including the defect part (Pf) from a conveyance line; and a control apparatus (55) that operates the defective discharge apparatus (26) in accordance with the result of detection by the defect detection apparatus, and that, when a length (L) of the plate-shaped double-sided corrugated cardboard sheet (F) is longer than a discharge allowable length (Ld) of the defective discharge apparatus (26), controls the cutoff (25) to cut the double-sided corrugated cardboard sheet (F) including the defect part (Pf) to a length shorter than the discharge allowable length (Ld).

Description

シートの不良除去装置及び方法並びに段ボールシートの製造装置Sheet defect removing apparatus and method, and cardboard sheet manufacturing apparatus
　本発明は、例えば、表ライナと波形加工された中芯と裏ライナとが貼り合わされて製造された段ボールシートの不良品を除去するシートの不良除去装置及び方法、並びに、シートの不良除去装置を備える段ボールシートの製造装置に関するものである。 The present invention provides, for example, a sheet defect removing device and method for removing defective products of a corrugated cardboard sheet manufactured by bonding a front liner, a corrugated core, and a back liner, and a sheet defect removing device. The present invention relates to an apparatus for manufacturing a corrugated cardboard sheet.
　段ボールシートの製造装置としてのコルゲートマシンは、片面段ボールシートを形成するシングルフェーサと、片面段ボールシートに表ライナ紙を貼り合わせて両面段ボールシートを形成するダブルフェーサと、連続する両面段ボールシートを所定の幅に切断するスリッタスコアラと、連続する両面段ボールシートを所定の長さに切断するカットオフとを備えている。シングルフェーサは、中芯を波形に加工し、裏ライナを貼合せて片面段ボールシートを形成し、ダブルフェーサは、この片面段ボールシートに表ライナを貼り合わせて両面段ボールシートを形成する。このダブルフェーサにより製造された連続する両面段ボールシートは、スリッタスコアラにより所定の幅に切断され、カットオフにより所定の長さに切断されて板状の段ボールシートとなる。 A corrugating machine as a corrugated cardboard sheet manufacturing apparatus includes a single facer for forming a single-sided corrugated cardboard sheet, a double facer for forming a double-sided corrugated cardboard sheet by bonding a front liner paper to the single-sided corrugated cardboard sheet, and a continuous double-faced corrugated cardboard sheet. It is provided with a slitter scorer for cutting into a width and a cutoff for cutting a continuous double-faced corrugated cardboard sheet into a predetermined length. The single facer forms the corrugated core and forms a single-sided corrugated cardboard sheet by laminating the back liner. The double facer forms a double-sided corrugated cardboard sheet by laminating the front liner to the single-side corrugated cardboard sheet. The continuous double-faced corrugated cardboard sheet manufactured by the double facer is cut to a predetermined width by a slitter scorer, and cut to a predetermined length by a cutoff to form a plate-like corrugated cardboard sheet.
　両面段ボールシートは、前述したように、表ライナと波形加工された中芯と裏ライナとが貼り合わされて製造されるものであるが、表ライナとして、既に表面に印刷が施されたプレプリントライナを用いることがある。通常、カットオフは、連続する段ボールシートを予め設定された所定の長さに切断することで、板状の段ボールシートとする。一方、プレプリントライナが用いられた段ボールシートは、予め切断位置に切断マークが印刷されており、カットオフは、切断マークを検出して、連続する段ボールシートを切断マークの位置で切断することで、絵柄に合わせた所定の長さの板状の段ボールシートとする。プレプリントライナが用いられた段ボールシートの製造装置としては、例えば、下記特許文献に記載されたものがある。 As described above, the double-faced corrugated cardboard sheet is manufactured by laminating the front liner, the corrugated core, and the back liner, but as a front liner, a preprint liner that has already been printed on the surface is used. May be used. Usually, the cut-off is performed by cutting a continuous corrugated cardboard sheet into a predetermined length, thereby obtaining a plate-shaped corrugated cardboard sheet. On the other hand, in the corrugated cardboard sheet using the preprint liner, a cutting mark is printed in advance at a cutting position, and the cutoff is performed by detecting the cutting mark and cutting a continuous cardboard sheet at the position of the cutting mark. And a plate-shaped corrugated cardboard sheet having a predetermined length according to the design. As an apparatus for manufacturing a corrugated cardboard sheet using a preprint liner, for example, there is one described in the following Patent Document.
特開２００６－０６２２４３号公報JP 2006-062243 A 特開２００５－２９７１０１号公報JP 2005-297101 A
　ところで、コルゲートマシンにて、段ボールシートは、紙継ぎ部や波形加工された中芯の変形部などを不良部とし、この不良部がある板状の段ボールシートを不良品として製造途中で搬送ラインから外部に排出している。即ち、検出装置が段ボールシートの不良部を検出、または、作業者が不良と判断し、所定の操作を行うと、カットオフが段ボールシートを所定の長さに切断した後、不良部がある板状の段ボールシートを不良品排出装置により搬送ラインから除去している。この場合、不良品排出装置は、搬送ラインから除去された不良品の段ボールシートを不良品回収箱に入れたり、搬送ラインに交差する排出コンベアにより集積所やシュレッダーまで搬送したりしている。これにより、不良品回収箱や排出コンベアは、板状の段ボールシートの全長より長いものとなり、場合によっては、大きな配置スペースが必要となって搬送ラインの近傍への配置が困難となる。また、予め切断位置に切断マークが印刷されていない段ボールシートであれば、不良発生時に切断長を任意の長さに変化させることが可能であるが、プレプリントライナが用いられた段ボールシートでは切断マークに基づいて切断するため、搬送ラインから除去できない大きさの不良品の段ボールシートが発生した場合、作業者が手作業により搬送ラインから除去せざるを得ず、作業者の負担が大きく、作業効率が良くないという課題がある。 By the way, in corrugated machine, the corrugated cardboard sheet is regarded as a defective part such as a paper spliced part or a deformed part of the corrugated core, and a plate-shaped corrugated cardboard sheet with this defective part is regarded as a defective product from the conveyance line during production. Discharged outside. That is, when the detecting device detects a defective portion of the corrugated cardboard sheet, or when the operator determines that it is defective, and performs a predetermined operation, the cutoff cuts the corrugated cardboard sheet into a predetermined length, and then the plate with the defective portion is cut off. The corrugated cardboard sheet is removed from the transport line by a defective product discharging device. In this case, the defective product discharging device puts the corrugated cardboard sheet of the defective product removed from the transport line into a defective product collection box, or transports the defective cardboard sheet to a collecting station or a shredder by a discharge conveyor crossing the transport line. As a result, the defective product collection box and the discharge conveyor become longer than the entire length of the plate-shaped corrugated cardboard sheet. In some cases, a large arrangement space is required, and it is difficult to arrange the defective box near the transport line. Further, if the cardboard sheet has no cutting mark printed in advance at the cutting position, it is possible to change the cutting length to an arbitrary length when a defect occurs, but in the case of a cardboard sheet using a preprint liner, the cutting length can be changed. If a defective cardboard sheet of a size that cannot be removed from the transport line occurs because it is cut based on the mark, the operator has to remove it manually from the transport line, which places a heavy burden on the operator, There is a problem that efficiency is not good.
　本発明は、上述した課題を解決するものであり、シートの長さに拘わらず不良品である段ボールシートを適正に搬送ラインから除去して作業効率の向上を図るシートの不良除去装置及び方法並びに段ボールシートの製造装置を提供することを目的とする。 The present invention solves the above-mentioned problems, and a sheet defect removing apparatus and method for appropriately removing a defective corrugated cardboard sheet from a transport line regardless of the sheet length to improve work efficiency, and An object of the present invention is to provide an apparatus for manufacturing a corrugated cardboard sheet.
　上記の目的を達成するための本発明のシートの不良除去装置は、第１ライナと波形加工された中芯と第２ライナが貼り合わされて形成された所定長さを有する板状の段ボールシートの不良品を除去するシートの不良除去装置において、段ボールシートを幅方向に沿って切断する切断装置と、段ボールシートの不良部を検出する不良検出装置と、前記不良部を含む板状の段ボールシートを搬送ラインから排出する不良品排出装置と、前記不良検出装置の検出結果に応じて前記不良品排出装置を作動すると共に板状の段ボールシートの長さが前記不良品排出装置の排出許容長さより長いときに前記不良部を含む段ボールシートを前記排出許容長さより短い長さに切断するように前記切断装置を制御する制御装置と、を備えるものである。 In order to achieve the above object, a sheet defect removing apparatus according to the present invention is directed to a sheet-shaped corrugated cardboard sheet having a predetermined length formed by bonding a first liner, a corrugated core, and a second liner. In a sheet defect removing device for removing a defective product, a cutting device for cutting a corrugated cardboard sheet along a width direction, a defect detecting device for detecting a defective portion of the corrugated cardboard sheet, and a plate-shaped corrugated cardboard sheet including the defective portion are provided. A defective product discharge device that discharges from the transport line, and the defective product discharge device is operated according to the detection result of the defective detection device, and the length of the plate-shaped corrugated cardboard sheet is longer than the discharge allowable length of the defective product discharge device. And a control device for controlling the cutting device so as to cut the corrugated cardboard sheet including the defective portion to a length shorter than the discharge allowable length.
　従って、不良検出装置が段ボールシートの不良部を検出すると、制御装置は、不良検出装置の検出結果に応じて不良品排出装置を作動し、不良部を含む板状の段ボールシートを搬送ラインから排出する。このとき、制御装置は、板状の段ボールシートの長さが不良品排出装置の排出許容長さより長いとき、切断装置を制御することで、不良部を含む段ボールシートを排出許容長さより短い長さに切断する。すると、不良部を含む段ボールシートは、排出許容長さより短くなり、不良部を含む段ボールシートを不良品排出装置により搬送ラインから適正に排出することができる。その結果、段ボールシートの長さに拘わらず不良品である段ボールシートを適正に搬送ラインから除去して作業効率の向上を図ることができる。 Therefore, when the defect detecting device detects a defective portion of the cardboard sheet, the control device operates the defective product discharging device according to the detection result of the defect detecting device, and discharges the plate-shaped cardboard sheet including the defective portion from the transport line. I do. At this time, when the length of the plate-shaped corrugated cardboard sheet is longer than the allowable discharge length of the defective product discharge device, the control device controls the cutting device to reduce the length of the corrugated cardboard sheet including the defective portion to a length shorter than the allowable discharge length. Cut into pieces. Then, the corrugated cardboard sheet including the defective portion becomes shorter than the allowable discharge length, and the corrugated cardboard sheet including the defective portion can be properly discharged from the transport line by the defective product discharging device. As a result, regardless of the length of the corrugated cardboard sheet, the defective corrugated cardboard sheet can be properly removed from the transport line to improve the working efficiency.
　本発明のシートの不良除去装置では、前記制御装置は、板状の段ボールシートの長さが前記排出許容長さより長いとき、前記不良部を含む段ボールシートを前記所定長さ以上の長さ範囲にわたって前記排出許容長さより短い長さに切断するように前記切断装置を制御することを特徴としている。 In the sheet defect removing apparatus of the present invention, when the length of the plate-shaped corrugated cardboard sheet is longer than the discharge allowable length, the control device moves the corrugated cardboard sheet including the defective portion over the length range of the predetermined length or more. It is characterized in that the cutting device is controlled so as to cut to a length shorter than the discharge allowable length.
　従って、不良部を含む段ボールシートを所定長さ以上の長さ範囲にわたって短い長さに切断することから、不良部を含む段ボールシートを適切に搬送ラインから排出することができる。 Therefore, since the corrugated cardboard sheet including the defective portion is cut into a short length over a length range equal to or longer than the predetermined length, the corrugated cardboard sheet including the defective portion can be properly discharged from the transport line.
　本発明のシートの不良除去装置では、前記切断装置は、連続する段ボールシートを幅方向に沿って予め設定された所定の第１切断長に切断することで板状の段ボールシートを形成するものであり、前記制御装置は、板状の段ボールシートの長さが前記排出許容長さより長いとき、前記不良部を含む段ボールシートの切断長を前記第１切断長の整数分の１である第２切断長に変更することを特徴としている。 In the sheet defect removing device of the present invention, the cutting device forms a plate-like corrugated cardboard sheet by cutting a continuous corrugated cardboard sheet to a predetermined first cutting length set in advance in the width direction. The control device may be configured such that when the length of the plate-shaped corrugated cardboard sheet is longer than the allowable discharge length, the second cutting unit sets the cut length of the corrugated cardboard sheet including the defective portion to be an integer fraction of the first cut length. It is characterized by changing to long.
　従って、切断装置は、連続する段ボールシートを第１切断長に切断して板状の段ボールシートを形成しており、連続する段ボールシートに不良部があり、且つ、板状の段ボールシートの長さが排出許容長さより長いとき、切断長を第１切断長より短い第２切断長に変更する。そのため、不良部を含む段ボールシートは、排出許容長さより短く切断されることとなり、不良品排出装置により容易に排出することができる。 Therefore, the cutting device cuts a continuous corrugated cardboard sheet to a first cutting length to form a plate-shaped corrugated cardboard sheet. The continuous corrugated cardboard sheet has a defective portion, and the length of the plate-shaped corrugated cardboard sheet is Is longer than the discharge allowable length, the cutting length is changed to a second cutting length shorter than the first cutting length. Therefore, the corrugated cardboard sheet including the defective portion is cut shorter than the discharge allowable length, and can be easily discharged by the defective product discharge device.
　本発明のシートの不良除去装置では、前記制御装置は、前記不良部を含む段ボールシートを前記第２切断長で前記整数分だけ切断した後、前記第２切断長から前記第１切断長に変更することを特徴としている。 In the sheet defect removing apparatus of the present invention, the control device cuts the corrugated cardboard sheet including the defective portion by the second cutting length by the integer, and then changes the second cutting length to the first cutting length. It is characterized by doing.
　従って、不良部を含む段ボールシートを排出許容長さより短く切断して排出した後、第２切断長から第１切断長に戻す。そのため、切断装置は、連続する段ボールシートを所定の第１切断長に切断して板状の段ボールシートを連続して形成することができる。 Therefore, after the corrugated cardboard sheet including the defective portion is cut shorter than the allowable discharge length and discharged, the second cut length is returned to the first cut length. Therefore, the cutting device can cut a continuous corrugated cardboard sheet into a predetermined first cutting length to continuously form a plate-shaped corrugated cardboard sheet.
　本発明のシートの不良除去装置では、前記制御装置は、前記第１切断長から前記第２切断長に変更した後、段ボールシートに前記不良部がないときは、前記第２切断長から第１切断長に変更することを特徴としている。 In the sheet defect removing apparatus according to the present invention, after the controller changes the first cutting length to the second cutting length, if the corrugated cardboard sheet does not have the defective portion, the controller cuts the second cutting length to the first cutting length. The feature is to change to the cutting length.
　従って、不良部を含む段ボールシートを短く切断して排出した後、段ボールシートに不良部がないとき、第２切断長から第１切断長に戻す。そのため、切断装置は、連続する段ボールシートを所定の第１切断長に切断して板状の段ボールシートを連続して形成することができる。 Therefore, after the corrugated cardboard sheet containing the defective portion is cut short and discharged, if there is no defective portion in the corrugated cardboard sheet, the second cut length is returned to the first cut length. Therefore, the cutting device can cut a continuous corrugated cardboard sheet into a predetermined first cutting length to continuously form a plate-shaped corrugated cardboard sheet.
　本発明のシートの不良除去装置では、第１ライナは、表面に切断位置を表す切断用マークが印刷され、前記切断装置より段ボールシートの搬送方向の上流側に前記切断用マークを検出するマーク検出装置が設けられ、前記制御装置は、前記第２切断長の位置に前記切断用マークがないとき、前記第２切断長に予め設定された余裕長を加算した位置で前記切断装置の作動を制御することを特徴としている。 In the sheet defect removing apparatus according to the present invention, the first liner has a cutting mark indicating a cutting position printed on a surface thereof, and a mark detection for detecting the cutting mark upstream of the cutting apparatus in the conveying direction of the cardboard sheet. A device is provided, and the control device controls the operation of the cutting device at a position obtained by adding a preset margin length to the second cutting length when the cutting mark is not present at the position of the second cutting length. It is characterized by doing.
　従って、第１ライナの表面に切断用マークがあるとき、制御装置は、マーク検出装置による切断用マークの検出時期に応じて切断装置の作動を制御して連続する段ボールシートを第１切断長で切断する。そして、制御装置は、段ボールシートに不良部にあり、且つ、長さが排出許容長さより長いときに第１切断長から第２切断長に変更するが、第２切断長の位置に切断用マークがないことから、第２切断長に余裕長を加算した位置で不良部を含む段ボールシートを切断する。そのため、不良部を含む段ボールシートは、排出許容長さより短く切断されることとなり、不良品排出装置により容易に排出することができる。 Therefore, when there is a cutting mark on the surface of the first liner, the control device controls the operation of the cutting device in accordance with the detection time of the cutting mark by the mark detecting device, and the continuous corrugated cardboard sheet is made to have the first cutting length. Disconnect. The control device changes the first cut length to the second cut length when the corrugated cardboard sheet is in a defective portion and the length is longer than the discharge allowable length, but the cutting mark is located at the position of the second cut length. Since there is no margin, the corrugated cardboard sheet including the defective portion is cut at a position obtained by adding the extra length to the second cutting length. Therefore, the corrugated cardboard sheet including the defective portion is cut shorter than the discharge allowable length, and can be easily discharged by the defective product discharge device.
　本発明のシートの不良除去装置では、前記制御装置は、第１切断長に基づいて前記切断装置の作動を制御するノーマル切断モードと、前記切断用マークに基づいて前記切断装置の作動を制御するプレプリント切断モードとを有し、前記ノーマル切断モードと前記プレプリント切断モードとの切換時に前記第１切断長から前記第２切断長に変更することを特徴としている。 In the sheet defect removing device of the present invention, the control device controls a normal cutting mode for controlling the operation of the cutting device based on a first cutting length, and controls the operation of the cutting device based on the cutting mark. A preprint cutting mode, wherein the first cutting length is changed to the second cutting length when switching between the normal cutting mode and the preprint cutting mode.
　従って、制御装置は、ノーマル切断モードからプレプリント切断モードへの切換時、または、プレプリント切断モードからノーマル切断モードへの切換時に、第１切断長から第２切断長に変更することから、モード切替時に発生する紙継ぎ部を含む段ボールシートを短く切断し、不良品排出装置により適正に排出することができる。 Therefore, the controller changes the mode from the first cutting length to the second cutting length when switching from the normal cutting mode to the preprint cutting mode or when switching from the preprint cutting mode to the normal cutting mode. A corrugated cardboard sheet including a paper splicing portion generated at the time of switching can be cut short, and can be properly discharged by a defective product discharging device.
　本発明のシートの不良除去装置では、前記不良部は、紙継ぎ部、中芯変形部、印刷不良部、傷、汚れ、糊かす付着の少なくともいずれか一つであることを特徴としている。 シ ー ト In the sheet defect removing apparatus of the present invention, the defective portion is at least one of a paper spliced portion, a core deformed portion, a defective printing portion, a scratch, a stain, and an adhesive residue.
　従って、紙継ぎ部や中芯変形部や印刷不良部などの不良部を含む段ボールシートを適正に短く切断して排出することができる。 Therefore, a corrugated cardboard sheet including a defective portion such as a paper spliced portion, a deformed core portion, or a defective printing portion can be appropriately cut into short pieces and discharged.
　また、本発明のシートの不良除去方法は、波形加工された中芯の両側にライナを貼り合わせて形成される両面段ボールシートを幅方向に沿って予め設定された所定長さに切断する工程と、段ボールシートの不良部を検出する工程と、板状の段ボールシートの長さが排出許容長さより長いときに前記不良部を含む段ボールシートを前記排出許容長さより短い長さに切断する工程と、前記排出許容長さより短い長さに切断された板状の段ボールシートを搬送ラインから排出する工程と、を有することを特徴とするものである。 Further, the method for removing defects of the sheet of the present invention is a step of cutting a double-faced corrugated cardboard sheet formed by laminating liners on both sides of a corrugated core to a predetermined length along a width direction. A step of detecting a defective portion of the corrugated cardboard sheet, and a step of cutting the corrugated cardboard sheet including the defective portion to a length shorter than the allowable discharge length when the length of the plate-shaped corrugated cardboard sheet is longer than the allowable discharge length, Discharging a plate-shaped corrugated cardboard sheet cut to a length shorter than the discharge allowable length from a transport line.
　従って、板状の段ボールシートの長さが排出許容長さより長いとき、不良部を含む段ボールシートを排出許容長さより短い長さに切断する。すると、不良部を含む段ボールシートは、排出許容長さより短くなり、不良部を含む段ボールシートを不良品排出装置により搬送ラインから適正に排出することができる。その結果、段ボールシートの長さに拘わらず不良品である段ボールシートを適正に搬送ラインから除去して作業効率の向上を図ることができる。 Therefore, when the length of the plate-shaped corrugated cardboard sheet is longer than the allowable discharge length, the corrugated cardboard sheet including the defective portion is cut into a length shorter than the allowable discharge length. Then, the corrugated cardboard sheet including the defective portion becomes shorter than the allowable discharge length, and the corrugated cardboard sheet including the defective portion can be properly discharged from the transport line by the defective product discharging device. As a result, regardless of the length of the corrugated cardboard sheet, the defective corrugated cardboard sheet can be properly removed from the transport line to improve the working efficiency.
　また、本発明の段ボールシートの製造装置は、波形加工された中芯に第２ライナを貼り合わせて片面段ボールシートを製造するシングルフェーサと、前記片面段ボールシートにおける前記中芯側に第１ライナを貼り合わせて両面段ボールシートを製造するダブルフェーサと、前記シートの不良除去装置と、を備えることを特徴とするものである。 The corrugated cardboard sheet manufacturing apparatus according to the present invention may further include a single facer for manufacturing a single-sided corrugated cardboard sheet by bonding a second liner to the corrugated core, and a first liner on the single-sided corrugated cardboard sheet side. And a double facer for manufacturing a double-faced corrugated cardboard sheet, and a sheet defect removing device.
　従って、シングルフェーサは、波形加工された中芯に第２ライナを貼り合わせて片面段ボールシートを製造し、ダブルフェーサは、シングルフェーサで製造される片面段ボールシートにおける中芯側に第１ライナを貼り合わせて両面段ボールシートを製造し、切断装置は、両面段ボールシートを幅方向に沿って所定長さに切断する。このとき、制御装置は、不良品排出装置により不良部を含む段ボールシートを搬送ラインから排出するが、板状の段ボールシートの長さが不良品排出装置の排出許容長さより長いときに切断装置を作動し、不良部を含む段ボールシートを排出許容長さより短い長さに切断する。すると、不良部を含む段ボールシートは、排出許容長さより短くなり、不良部を含む段ボールシートを不良品排出装置により搬送ラインから適正に排出することができる。その結果、段ボールシートの長さに拘わらず不良品である段ボールシートを適正に搬送ラインから除去して作業効率の向上を図ることができる。 Therefore, a single facer produces a single-sided corrugated cardboard sheet by laminating a second liner to the corrugated core, and a double facer provides a first liner on the central side of a single-sided corrugated cardboard sheet produced by a single facer. The two-sided corrugated cardboard sheet is manufactured by laminating, and the cutting device cuts the two-sided corrugated cardboard sheet into a predetermined length along the width direction. At this time, the control device discharges the corrugated cardboard sheet including the defective portion from the transport line by the defective product discharging device, but when the length of the plate-shaped corrugated cardboard sheet is longer than the discharge allowable length of the defective product discharging device, the control device causes the cutting device to operate. Activate to cut the corrugated cardboard sheet containing the defective portion into a length shorter than the allowable discharge length. Then, the corrugated cardboard sheet including the defective portion becomes shorter than the allowable discharge length, and the corrugated cardboard sheet including the defective portion can be properly discharged from the transport line by the defective product discharging device. As a result, regardless of the length of the corrugated cardboard sheet, the defective corrugated cardboard sheet can be properly removed from the transport line to improve the working efficiency.
　本発明のシートの不良除去装置及び方法並びに段ボールシートの製造装置によれば、段ボールシートの長さに拘わらず、不良品であるシートを適正に搬送ラインから除去することで、作業効率の向上を図ることができる。 ADVANTAGE OF THE INVENTION According to the sheet | seat defect removal apparatus and method of this invention, and the manufacturing apparatus of a corrugated cardboard sheet, regardless of the length of a corrugated cardboard sheet, the sheet | seat which is a defective article is removed from a conveyance line appropriately, and the improvement of work efficiency is improved. Can be planned.
図１は、本実施形態の段ボールシートの製造装置としてのコルゲートマシンを表す概略図である。FIG. 1 is a schematic diagram illustrating a corrugating machine as a corrugated sheet manufacturing apparatus according to the present embodiment. 図２は、本実施形態のシートの不良除去装置を表す構成図である。FIG. 2 is a configuration diagram illustrating a sheet defect removing apparatus according to the present embodiment. 図３は、不良品排出装置を表す概略図である。FIG. 3 is a schematic diagram illustrating a defective product discharging device. 図４は、プレプリント切断モードにおける通常時のカットオフの作動を表す概略図である。FIG. 4 is a schematic diagram illustrating an operation of a cutoff in a normal state in the preprint cutting mode. 図５は、プレプリント切断モードにおける不良部発生時のカットオフの作動を表す概略図である。FIG. 5 is a schematic diagram showing a cutoff operation when a defective portion occurs in the preprint cutting mode. 図６は、ノーマル切断モードからプレプリント切断モードへの切換時における不良除去装置の作動を表すタイムチャートである。FIG. 6 is a time chart showing the operation of the defect removing device when switching from the normal cutting mode to the preprint cutting mode. 図７は、プレプリント切断モードにおける不良除去装置の作動を表すタイムチャートである。FIG. 7 is a time chart showing the operation of the defect removing device in the preprint cutting mode. 図８は、プレプリント切断モードからノーマル切断モードへの切換時における不良除去装置の作動を表すタイムチャートである。FIG. 8 is a time chart showing the operation of the defect removing device when switching from the preprint cutting mode to the normal cutting mode.
　以下に添付図面を参照して、本発明のシートの不良除去装置及び方法並びに段ボールシートの製造装置の好適な実施形態を詳細に説明する。なお、この実施形態により本発明が限定されるものではなく、また、実施形態が複数ある場合には、各実施形態を組み合わせて構成するものも含むものである。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a sheet defect removing apparatus and method and a cardboard sheet manufacturing apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited by the embodiments, and when there are a plurality of embodiments, the embodiments include a combination of the embodiments.
　図１は、本実施形態の段ボールシートの製造装置としてのコルゲートマシンを表す概略図である。 FIG. 1 is a schematic view showing a corrugating machine as a corrugated cardboard sheet manufacturing apparatus of the present embodiment.
　本実施形態において、図１に示すように、段ボールシートの製造装置としてのコルゲートマシン１０は、まず、波形加工された中芯Ｂ１に裏ライナ（第２ライナ）Ｃ１を貼り合わせて片面段ボールシートＤ１を製造する。次に、製造された片面段ボールシートＤ１の中芯Ｂ１に表ライナ（第１ライナ）Ａを貼り合わせて連続する両面段ボールシートＥ１を製造する。そして、連続する両面段ボールシートＥ１を所定長さに切断することで、板状の両面段ボールシートＦ１を製造することができる。また、コルゲートマシン１０は、まず、上述した片面段ボールシートＤ１を製造すると共に、波形加工された中芯Ｂ２に裏ライナ（第２ライナ）Ｃ２を貼り合わせて片面段ボールシートＤ２を製造する。次に、製造された片面段ボールシートＤ１の中芯Ｂ１に片面段ボールシートＤ２の裏ライナＣ２を貼り合せると共に、片面段ボールシートＤ２の中芯Ｂ２に表ライナ（第１ライナ）Ａを貼り合わせて連続する複両面段ボールシートＥ２を製造する。そして、連続する複両面段ボールシートＥ２を所定長さに切断することで、板状の複両面段ボールシートＦ２を製造することができる。 In the present embodiment, as shown in FIG. 1, a corrugating machine 10 as a corrugated cardboard sheet manufacturing apparatus firstly attaches a back liner (second liner) C1 to a corrugated core B1 to form a single-sided corrugated cardboard sheet D1. To manufacture. Next, the front liner (first liner) A is attached to the core B1 of the manufactured single-sided cardboard sheet D1 to manufacture a continuous double-sided cardboard sheet E1. Then, by cutting the continuous double-faced corrugated paperboard sheet E1 to a predetermined length, a plate-like double-faced corrugated paperboard sheet F1 can be manufactured. The corrugating machine 10 firstly manufactures the single-sided corrugated cardboard sheet D1 and also attaches the back liner (second liner) C2 to the corrugated core B2 to produce the single-sided corrugated cardboard sheet D2. Next, the back liner C2 of the single-sided cardboard sheet D2 is bonded to the center B1 of the manufactured single-sided cardboard sheet D1, and the front liner (first liner) A is bonded to the center B2 of the single-sided cardboard sheet D2. To produce a double-sided double-faced corrugated cardboard sheet E2. Then, by cutting the continuous double-sided corrugated cardboard sheet E2 to a predetermined length, a plate-shaped double-sided corrugated cardboard sheet F2 can be manufactured.
　コルゲートマシン１０は、中芯Ｂ１のミルロールスタンド１１と、裏ライナＣ１のミルロールスタンド１２と、シングルフェーサ１３と、ブリッジ１４と、中芯Ｂ２のミルロールスタンド１５と、裏ライナＣ２のミルロールスタンド１６と、シングルフェーサ１７と、ブリッジ１８と、表ライナＡのミルロールスタンド１９と、プレヒータ２０と、グルーマシン２１と、ダブルフェーサ２２と、ロータリシャ２３と、スリッタスコアラ２４と、カットオフ（切断装置）２５と、不良品排出装置２６と、スタッカ２７を有している。 The corrugating machine 10 includes a mill roll stand 11 for the 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 B2, and a mill for the back liner C2. Roll stand 16, single facer 17, bridge 18, mill roll stand 19 of front liner A, preheater 20, glue machine 21, double facer 22, rotary shear 23, slitter scorer 24, cut-off (Cutting device) 25, defective product discharging device 26, and stacker 27.
　各ミルロールスタンド１１，１５は、両側にそれぞれ中芯Ｂ１，Ｂ２が形成される中芯がロール状に巻かれたロール紙が装着されており、各ロール紙の間に紙継ぎを行うスプライサ２８が設けられている。一方のロール紙から給紙されているときに、他方のロール紙が装着されて紙継ぎ準備がなされ、スプライサ２８は、一方のロール紙が残り少なくなると、一方のロール紙に他方のロール紙が紙継ぎされる。そのため、各ミルロールスタンド１１，１５から下流側へ向けて連続的に給紙されることになる。 Each of the mill roll stands 11 and 15 is provided with a roll paper in which the cores B1 and B2 are formed on both sides, respectively. Is provided. When paper is fed from one roll paper, the other roll paper is mounted and paper splicing preparation is performed. When one roll paper runs short, the other roll paper is replaced with the other roll paper. Be spliced. Therefore, paper is continuously fed downstream from each of the mill roll stands 11 and 15.
　また、ミルロールスタンド１２，１６は、両側にそれぞれ裏ライナＣ１，Ｃ２がロール状に巻かれたロール紙が装着されており、各ロール紙の間に紙継ぎを行うスプライサ２８が設けられている。一方のロール紙から給紙されているときに、他方のロール紙が装着されて紙継ぎ準備がなされ、スプライサ２８は、一方のロール紙が残り少なくなると、一方のロール紙に他方のロール紙が紙継ぎされる。そのため、各ミルロールスタンド１２，１６から下流側へ向けて連続的に給紙されることになる。 The mill roll stands 12 and 16 are provided with roll paper on each side of which the back liners C1 and C2 are wound in a roll shape, and a splicer 28 for splicing between the roll papers. . When paper is fed from one roll paper, the other roll paper is mounted and paper splicing preparation is performed. When one roll paper runs short, the other roll paper is replaced with the other roll paper. Be spliced. Therefore, the paper is continuously fed from each of the mill roll stands 12 and 16 to the downstream side.
　各ミルロールスタンド１１，１５から繰り出される中芯Ｂ１，Ｂ２と、ミルロールスタンド１２，１６から繰り出される裏ライナＣ１，Ｃ２は、それぞれ図示しないプレヒータにより予熱される。各プレヒータは、内部に蒸気が供給される加熱ロールを有し、中芯Ｂ１，Ｂ２や裏ライナＣ１，Ｃ２を加熱ロールに巻き付けて搬送することで、所定温度まで昇温する。 (4) The cores B1 and B2 fed from the mill roll stands 11 and 15 and the back liners C1 and C2 fed from the mill roll stands 12 and 16 are preheated by preheaters (not shown). Each preheater has a heating roll into which steam is supplied, and heats the cores B1 and B2 and the back liners C1 and C2 to a predetermined temperature by being wound around the heating roll and transported.
　シングルフェーサ１３は、加熱された中芯Ｂ１を波状に加工した後に各段頂部に糊付けし、加熱された裏ライナＣ１を貼り合わせて片面段ボールシートＤ１を形成する。シングルフェーサ１３は、搬送方向下流側の斜め上方に取上げコンベアが設けられており、シングルフェーサ１３で形成された片面段ボールシートＤ１をブリッジ１４に搬送する。このブリッジ１４は、シングルフェーサ１３とダブルフェーサ２２との速度差を吸収するため、片面段ボールシートＤ１を一次的に滞留させることができる。 The single facer 13 processes the heated core B1 into a corrugated shape, glues it to the top of each step, and attaches the heated back liner C1 to form a single-sided cardboard sheet D1. The single facer 13 is provided with a pick-up conveyor at an obliquely upper portion on the downstream side in the transport direction, and transports the single-faced cardboard sheet D1 formed by the single facer 13 to the bridge 14. The bridge 14 absorbs the speed difference between the single facer 13 and the double facer 22, so that the single-sided cardboard sheet D1 can temporarily stay.
　また、シングルフェーサ１７は、加熱された中芯Ｂ２を波状に加工した後に各段頂部に糊付けし、加熱された裏ライナＣ２を貼り合わせて片面段ボールシートＤ２を形成する。シングルフェーサ１７は、搬送方向下流側の斜め上方に取上げコンベアが設けられており、シングルフェーサ１７で形成された片面段ボールシートＤ２をブリッジ１８に搬送する。このブリッジ１８は、シングルフェーサ１７とダブルフェーサ２２との速度差を吸収するため、片面段ボールシートＤ２を一次的に滞留させることができる。 The single facer 17 also processes the heated core B2 into a wavy shape, glues it to the top of each step, and attaches the heated back liner C2 to form a single-sided cardboard sheet D2. The single facer 17 is provided with a pickup conveyor obliquely above the downstream side in the transport direction, and transports the single-faced cardboard sheet D2 formed by the single facer 17 to the bridge 18. The bridge 18 absorbs the speed difference between the single facer 17 and the double facer 22, so that the single-faced cardboard sheet D2 can temporarily stay.
　ミルロールスタンド１９は、両側にそれぞれ表ライナＡがロール状に巻かれたロール紙が装着されており、各ロール紙の間に紙継ぎを行うスプライサ２８が設けられている。一方のロール紙から給紙されているときに、他方のロール紙が装着されて紙継ぎ準備がなされ、スプライサ２８は、一方のロール紙が残り少なくなると、一方のロール紙に他方のロール紙が紙継ぎされる。そのため、ミルロールスタンド１９から下流側へ向けて連続的に給紙されることになる。 The mill roll stand 19 is provided with roll paper on each side of which the front liner A is wound in a roll shape, and is provided with a splicer 28 for splicing between the roll papers. When paper is fed from one roll paper, the other roll paper is mounted and paper splicing preparation is performed. When one roll paper runs short, the other roll paper is replaced with the other roll paper. Be spliced. Therefore, paper is continuously fed from the mill roll stand 19 to the downstream side.
　プレヒータ２０は、３個の予熱ロール３１，３２，３３が鉛直方向に並んで配置されている。予熱ロール３１は、表ライナＡを加熱するものであり、予熱ロール３２は、片面段ボールシートＤ２を加熱するものであり、予熱ロール３３は、片面段ボールシートＤ１を加熱するものである。また、各予熱ロール３１，３２，３３は、巻き付け量調整装置（図示略）を有すると共に、内部に蒸気が供給されて所定の温度に加熱されており、周面に表ライナＡ、片面段ボールシートＤ２、片面段ボールシートＤ１が巻き付けられることで、予加熱することができる。 The preheater 20 has three preheating rolls 31, 32, 33 arranged in a vertical direction. The preheating roll 31 heats the front liner A, the preheating roll 32 heats the single-sided cardboard sheet D2, and the preheating roll 33 heats the single-sided cardboard sheet D1. Each of the preheating rolls 31, 32, and 33 has a winding amount adjusting device (not shown), and is supplied with steam and heated to a predetermined temperature. D2, the preheating can be performed by winding the single-sided corrugated cardboard sheet D1.
　グルーマシン２１は、糊付けロール３４，３５が鉛直方向に並んで配置されている。糊付けロール３４は、予熱ロール３２で加熱された片面段ボールシートＤ２における中芯Ｂ２の各頂部に接触して糊付けを行うものである。糊付けロール３５は、予熱ロール３３で加熱された片面段ボールシートＤ１における中芯Ｂ１の各頂部に接触して糊付けを行うものである。グルーマシン２１により糊付けされた片面段ボールシートＤ１，Ｄ２は、次工程のダブルフェーサ２２に移送される。また、予熱ロール３１で加熱された表ライナＡもグルーマシン２１内を通ってダブルフェーサ２２に移送される。 The glue machine 21 has gluing rolls 34 and 35 arranged in a vertical direction. The gluing roll 34 performs gluing by contacting each top of the core B2 in the single-sided corrugated cardboard sheet D2 heated by the preheating roll 32. The gluing roll 35 performs gluing by contacting each top of the core B1 in the single-sided corrugated cardboard sheet D1 heated by the preheating roll 33. The single-faced cardboard sheets D1 and D2 glued by the glue machine 21 are transferred to the double facer 22 in the next step. The front liner A heated by the preheating roll 31 is also transferred to the double facer 22 through the glue machine 21.
　ダブルフェーサ２２は、各片面段ボールシートＤ１，Ｄ２及び表ライナＡの走行ラインに沿って、上流側のヒーティングセクション３６と、下流側のクーリングセクション３７とを有している。グルーマシン２１で糊付けされた片面段ボールシートＤ１，Ｄ２及び表ライナＡは、ヒーティングセクション３６にて、加圧ベルトと熱板との間に搬入され、互いに重なりあった状態で一体となってクーリングセクション３７へ向けて移送される。この移送中、各片面段ボールシートＤ１，Ｄ２と表ライナＡは、加圧されながら加熱されることで、互いに貼り合わされて連続する複両面段ボールシートＥ２となり、その後、搬送されながら自然冷却される。なお、両面段ボールシートＥ１を製造するときには、片面段ボールシートＤ２を製造しないことから、片面段ボールシートＤ１及び表ライナＡが加圧されながら加熱されることで、互いに貼り合わされて連続する両面段ボールシートＥ１となる。 The double facer 22 has an upstream heating section 36 and a downstream cooling section 37 along the single-sided corrugated cardboard sheets D1 and D2 and the running line of the front liner A. The single-sided corrugated cardboard sheets D1 and D2 and the front liner A glued by the glue machine 21 are carried between the pressure belt and the hot plate in the heating section 36, and are integrally cooled while overlapping each other. Transported to section 37. During this transfer, the single-faced corrugated cardboard sheets D1 and D2 and the front liner A are heated while being pressurized to be bonded to each other to form a continuous double-faced corrugated cardboard sheet E2, which is then naturally cooled while being conveyed. When manufacturing the double-faced corrugated cardboard sheet E1, since the single-sided corrugated cardboard sheet D2 is not manufactured, the single-sided corrugated cardboard sheet D1 and the front liner A are heated while being pressed, so that the two-sided corrugated cardboard sheets E1 are bonded to each other and continuous. Becomes
　ダブルフェーサ２２で製造された複両面段ボールシートＥ２（両面段ボールシートＥ１）は、ロータリシャ２３に移送される。このロータリシャ２３は、稼動初期段階で貼合せが安定するまでといった場合に、複両面段ボールシートＥ２を幅方向に全幅切断あるいは部分切断する。スリッタスコアラ２４は、幅広の複両面段ボールシートＥ２を所定の幅を持つように搬送方向に沿って裁断し、且つ、搬送方向に延在する罫線を加工するものである。このスリッタスコアラ２４は、複両面段ボールシートＥ２の搬送方向に沿って配列された略同一構造をした第１スリッタスコアラユニット３８と第２スリッタスコアラユニット３９とから構成されている。幅広の複両面段ボールシートＥ２は、このスリッタスコアラ２４により裁断されることで、所定幅の複両面段ボールシートＥ２が形成される。 The double-faced cardboard sheet E2 (double-faced cardboard sheet E1) manufactured by the double facer 22 is transferred to the rotary shear 23. This rotary shear 23 cuts the full width or partial cut of the double-faced corrugated cardboard sheet E2 in the width direction when the lamination is stabilized in the initial stage of operation. The slitter scorer 24 cuts the wide double-sided double-faced corrugated cardboard sheet E2 along the transport direction so as to have a predetermined width, and processes a ruled line extending in the transport direction. The slitter scorer 24 includes a first slitter scorer unit 38 and a second slitter scorer unit 39 which are arranged along the conveying direction of the double-sided corrugated cardboard sheet E2 and have substantially the same structure. The wide double-faced corrugated cardboard sheet E2 is cut by the slitter scorer 24 to form a double-faced double-faced corrugated cardboard sheet E2.
　カットオフ２５は、スリッタスコアラ２４によって搬送方向に裁断された複両面段ボールシートＥ２を幅方向に沿って切断し、所定長さをもった板状の複両面段ボールシートＦ２（両面段ボールシートＦ１）に形成するものである。不良品排出装置２６は、不良品と検出された複両面段ボールシートＦ２を搬送ラインから排出するものである。不良品が発生する要因としては、例えば、紙継ぎ不良や中芯の変形、傷、汚れ、糊かすの付着などがある。スタッカ２７は、良品と判定された複両面段ボールシートＦ２を積み上げて製品として機外に排出するものである。 The cut-off 25 cuts the double-sided corrugated cardboard sheet E2 cut in the conveying direction by the slitter scorer 24 along the width direction to form a plate-shaped double-sided corrugated cardboard sheet F2 (double-sided corrugated cardboard sheet F1) having a predetermined length. To form. The defective product discharge device 26 discharges the double-sided double-faced corrugated paperboard sheet F2 detected as a defective product from the transport line. Factors that cause defective products include, for example, poor splicing, deformation of the core, scratches, dirt, and adhesion of glue residue. The stacker 27 is for stacking the double-sided double-faced corrugated cardboard sheet F2 determined as a non-defective product and discharging it as a product outside the machine.
　なお、本実施形態のコルゲートマシン１０は、上述したように、板状の両面段ボールシートＦ１と板状の複両面段ボールシートＦ２を製造することができるものである。しかし、以下に説明する裁断工程や切断工程などでは、ほぼ同様の作業工程である。そのため以下の説明では、連続する両面段ボールシートＥ１及び連続する複両面段ボールシートＥ２を連続する両面段ボールシートＥとして表し、板状の両面段ボールシートＦ１及び板状の複両面段ボールシートＦ２を板状の両面段ボールシートＦとして表す。 As described above, the corrugating machine 10 of the present embodiment is capable of manufacturing a plate-shaped double-sided corrugated cardboard sheet F1 and a plate-shaped double-sided corrugated cardboard sheet F2. However, the cutting process and the cutting process described below are almost the same operation process. Therefore, in the following description, the continuous double-sided corrugated cardboard sheet E1 and the continuous double-sided corrugated cardboard sheet E2 are represented as a continuous double-sided corrugated cardboard sheet E, and the plate-shaped double-sided corrugated cardboard sheet F1 and the plate-shaped double-sided corrugated cardboard sheet F2 are referred to as plate-shaped. Expressed as a double-faced cardboard sheet F.
　ここで、本実施形態のシートの不良除去装置について説明する。コルゲートマシン１０は、最終的に、カットオフ２５が連続する両面段ボールシートＥを所定の切断長に切断することで、板状の両面段ボールシートＦを形成する。シートの不良除去装置は、板状の両面段ボールシートＦの製造過程で検出した不良部を含む板状の両面段ボールシートＦを不良品として不良品排出装置２６により搬送ラインから排出する。但し、不良品排出装置２６は、構造上または配置スペース上などの理由から、板状の両面段ボールシートＦの排出許容長さが設定されており、排出許容長さよりも長い板状の両面段ボールシートＦを排出することができない。そこで、本実施形態では、不良部を含む両面段ボールシートＥを排出許容長さよりも短く複数のシートに切断して排出する。 Here, the sheet defect removing apparatus of the present embodiment will be described. The corrugating machine 10 finally forms the plate-like double-faced corrugated paperboard sheet F by cutting the double-faced corrugated paperboard sheet E having the continuous cutoff 25 to a predetermined cutting length. The sheet defect removing device discharges the plate-shaped double-faced corrugated cardboard sheet F including the defective portion detected in the manufacturing process of the plate-shaped double-faced corrugated cardboard sheet F as a defective product from the transport line by the defective product discharging device 26. However, in the defective product discharging device 26, the discharge allowable length of the plate-shaped double-faced corrugated cardboard sheet F is set for reasons such as structure or arrangement space, and the plate-shaped double-faced corrugated cardboard sheet longer than the discharge allowable length. F cannot be discharged. Therefore, in the present embodiment, the double-faced corrugated cardboard sheet E including the defective portion is cut into a plurality of sheets shorter than the discharge allowable length and discharged.
　以下、本実施形態のシートの不良除去装置について詳細に説明する。図２は、本実施形態のシートの不良除去装置を表す構成図、図３は、不良品排出装置を表す概略図である。 Hereinafter, the sheet defect removing apparatus of the present embodiment will be described in detail. FIG. 2 is a configuration diagram illustrating a sheet defect removing device according to the present embodiment, and FIG. 3 is a schematic diagram illustrating a defective product discharging device.
　図２に示すように、本実施形態のシートの不良除去装置５０は、表ライナＡと波形加工された中芯Ｂ１，Ｂ２と裏ライナＣ１，Ｃ２が貼り合わされて形成された板状の両面段ボールシートＦ（Ｆ１，Ｆ２）の不良品を除去するものである。シートの不良除去装置５０は、切断装置としてのカットオフ２５と、不良検出装置としての紙継ぎ部検出装置５１（５１ａ，５１ｂ，５１ｃ，５１ｄ，５１ｅ）、片段不良検出装置５２（５２ａ，５２ｂ）、品質検査装置５３（５３ａ，５３ｂ）、不良検出スイッチ５４（５４ａ，５４ｂ）と、不良品排出装置２６と、制御装置５５と、カットオフ制御装置５６とを備える。 As shown in FIG. 2, a sheet defect removing apparatus 50 of the present embodiment is a plate-shaped double-faced corrugated cardboard formed by bonding a front liner A, corrugated cores B1, B2 and back liners C1, C2. This is to remove defective products of the sheet F (F1, F2). The sheet defect removing device 50 includes a cutoff 25 as a cutting device, a paper spliced portion detecting device 51 (51a, 51b, 51c, 51d, 51e) as a defect detecting device, and a single-stage defect detecting device 52 (52a, 52b). , A quality inspection device 53 (53a, 53b), a failure detection switch 54 (54a, 54b), a defective product discharging device 26, a control device 55, and a cutoff control device 56.
　図３に示すように、カットオフ２５は、両面段ボールシートＥを幅方向に沿って切断し、所定の切断長の板状の両面段ボールシートＦを形成する。カットオフ２５は、搬送コンベア６１と、上下一対の切断ロール６２，６３を有する。そのため、カットオフ２５は、搬送コンベア６１により搬送された両面段ボールシートＥを上下一対の切断ロール６２，６３により切断することで、板状の両面段ボールシートＦを形成する。不良品排出装置２６は、不良部を含む板状の両面段ボールシートＦを搬送ラインから排出する。不良品排出装置２６は、第１搬送コンベア６４と、第２搬送コンベア６５と、第１排出コンベア６６と、第２排出コンベア６７と、振分ロール６８とを有する。 カ ッ ト As shown in FIG. 3, the cutoff 25 cuts the double-faced corrugated cardboard sheet E along the width direction to form a plate-shaped double-faced corrugated cardboard sheet F having a predetermined cutting length. The cutoff 25 has a conveyor 61 and a pair of upper and lower cutting rolls 62 and 63. Therefore, the cut-off 25 forms the plate-shaped double-faced corrugated paperboard sheet F by cutting the double-faced corrugated paperboard sheet E transported by the transport conveyor 61 by the pair of upper and lower cutting rolls 62 and 63. The defective product discharging device 26 discharges a plate-shaped double-faced corrugated cardboard sheet F including a defective portion from the transport line. The defective product discharging device 26 includes a first transport conveyor 64, a second transport conveyor 65, a first discharge conveyor 66, a second discharge conveyor 67, and a distribution roll 68.
　第１搬送コンベア６４は、水平搬送部６４ａと、下向き搬送部６４ｂとを有し、カットオフ２５で切断された板状の両面段ボールシートＦを受け取って搬送する。第２搬送コンベア６５は、第１搬送コンベア６４における水平搬送部６４ａの下流側に連続して配置され、良品として搬送される板状の両面段ボールシートＦを受け取って搬送する。第１排出コンベア６６は、第１搬送コンベア６４における下向き搬送部６４ｂの下流側に連続して配置され、不良品として排出された板状の両面段ボールシートＦ０を受け取って搬送する。第２排出コンベア６７は、第１排出コンベア６６の下流側に連続して配置され、不良品として排出された板状の両面段ボールシートＦ０を受け取って搬送する。本実施形態にて、第２排出コンベア６７は、板状の両面段ボールシートＦの搬送ラインに対して交差する水平方向に沿って板状の両面段ボールシートＦ０を搬送して排出する。 The first transport conveyor 64 has a horizontal transport section 64a and a downward transport section 64b, and receives and transports a plate-shaped double-faced cardboard sheet F cut at the cutoff 25. The second transport conveyor 65 is arranged continuously downstream of the horizontal transport section 64a in the first transport conveyor 64, and receives and transports a plate-shaped double-faced cardboard sheet F transported as a non-defective product. The first discharge conveyor 66 is arranged continuously downstream of the downward conveying portion 64b of the first conveying conveyor 64, and receives and conveys a plate-shaped double-faced cardboard sheet F0 discharged as a defective product. The second discharge conveyor 67 is arranged continuously downstream of the first discharge conveyor 66, and receives and transports a plate-shaped double-faced corrugated cardboard sheet F0 discharged as a defective product. In the present embodiment, the second discharge conveyor 67 conveys and discharges the plate-shaped double-faced corrugated cardboard sheet F0 along a horizontal direction intersecting the conveyance line of the plate-shaped double-faced corrugated cardboard sheet F.
　振分ロール６８は、第１搬送コンベア６４における水平搬送部６４ａと下向き搬送部６４ｂの間の上方に配置される。振分ロール６８は、上下方向に移動可能である。そのため、良品と判定された板状の両面段ボールシートＦが搬送されると、振分ロール６８を上昇位置に待機させることで、良品の板状の両面段ボールシートＦを水平搬送部６４ａから第２搬送コンベア６５に搬送する。一方、不良品と判定された板状の両面段ボールシートＦが搬送されると、振分ロール６８を下降させることで、不良品の板状の両面段ボールシートＦ０を水平搬送部６４ａから下向き搬送部６４ｂに振り分け、第１排出コンベア６６と第２排出コンベア６７を用いて排出する。 The distribution roll 68 is disposed above the first transport conveyor 64 between the horizontal transport section 64a and the downward transport section 64b. The distribution roll 68 is vertically movable. Therefore, when the plate-shaped double-faced corrugated cardboard sheet F determined to be non-defective is conveyed, the distribution roll 68 is made to stand by at the rising position, so that the non-defective plate-shaped double-faced corrugated cardboard sheet F is transported from the horizontal conveying section 64a to the second conveying section 64a. It is transported to the transport conveyor 65. On the other hand, when the plate-shaped double-faced corrugated cardboard sheet F determined to be defective is conveyed, the distribution roll 68 is lowered to move the defective plate-shaped double-faced corrugated cardboard sheet F0 from the horizontal conveying section 64a to the downward conveying section. 64b, and discharged using the first discharge conveyor 66 and the second discharge conveyor 67.
　スタッカ２７は、良品と判定された板状の両面段ボールシートＦを積み上げて製品として機外に排出するものである。スタッカ２７は、複数の搬送コンベア６９，７０，７１と、積み上げ台（図示略）とを有する。良品の板状の両面段ボールシートＦは、スタッカ２７に送られ、各搬送コンベア６９，７０，７１で重ねられて搬送された後、積み上げ台上に積み上げられる。 The stacker 27 is for stacking plate-shaped double-faced corrugated cardboard sheets F determined to be non-defective and discharging them as products to the outside of the machine. The stacker 27 has a plurality of conveyors 69, 70, 71 and a stacking stand (not shown). The non-defective plate-shaped double-faced corrugated cardboard sheets F are sent to the stacker 27, stacked and conveyed by the conveyors 69, 70, 71, and then stacked on the stacking table.
　また、本実施形態のコルゲートマシン１０は、プレプリントライナを用いた板状の両面段ボールシートＦを製造可能である。プレプリントライナとは、予め表面に所定の絵柄や文字などが印刷されたものであり、表ライナＡとしてプレプリントライナが適用される。また、表ライナＡ（プレプリントライナ）は、表面に絵柄や文字だけではなく、切断位置を表す切断用マークが印刷されている。そのため、カットオフ２５より板状の両面段ボールシートＦの搬送方向の上流側にマーク検出装置７５が配置される。マーク検出装置７５は、支持台７６と、この支持台７６に装着されたマークセンサ７７とを有する。表ライナＡは、搬送される板状の両面段ボールシートＦの下面側に位置し、表面（下面）に切断用マークが印刷されていることから、マークセンサ７７は、板状の両面段ボールシートＦの下面側に対向して配置される。 コ ル Further, the corrugating machine 10 of the present embodiment can manufacture a plate-shaped double-faced corrugated cardboard sheet F using a preprint liner. The preprint liner has a predetermined pattern, character, or the like printed on the surface in advance, and the preprint liner is used as the front liner A. The front liner A (preprint liner) has not only pictures and characters but also a cutting mark indicating a cutting position printed on the surface. Therefore, the mark detection device 75 is disposed upstream of the cutoff 25 in the transport direction of the plate-shaped double-faced corrugated cardboard sheet F. The mark detection device 75 includes a support base 76 and a mark sensor 77 mounted on the support base 76. The front liner A is located on the lower surface side of the plate-shaped double-faced corrugated cardboard sheet F to be conveyed, and the cutting mark is printed on the front surface (lower surface). Is arranged to face the lower surface side.
　ここで、上述した不良検出装置としての紙継ぎ部検出装置５１（５１ａ，５１ｂ，５１ｃ，５１ｄ，５１ｅ）と、片段不良検出装置５２（５２ａ，５２ｂ）と、品質検査装置５３（５３ａ，５３ｂ）と、不良検出スイッチ５４（５４ａ，５４ｂ）とを説明する。図２および図３に示すように、紙継ぎ部検出装置５１は、スプライサ２８に配置され、スプライサ２８が表ライナＡ、中芯Ｂ（Ｂ１，Ｂ２）、裏ライナＣ（Ｃ１，Ｃ２）の紙継ぎを行ったことを検出し、制御装置５５に紙継ぎ信号を出力する。制御装置５５は、紙継ぎ部検出装置５１から入力された紙継ぎ信号に基づいて、表ライナＡ、中芯Ｂ、裏ライナＣの搬送速度と、紙継ぎ位置からカットオフ２５までの搬送距離とから、不良部としての紙継ぎ部がカットオフ２５に到達する時間を算出する。さらに、制御装置５５は、同様に、カットオフ２５から不良品排出装置２６までの到達時間を算出する。 Here, the spliced portion detection device 51 (51a, 51b, 51c, 51d, 51e), the single-stage defect detection device 52 (52a, 52b), and the quality inspection device 53 (53a, 53b) as the above-described defect detection device. And the failure detection switch 54 (54a, 54b) will be described. As shown in FIG. 2 and FIG. 3, the spliced portion detecting device 51 is disposed on the splicer 28, and the splicer 28 is formed of paper of the front liner A, the core B (B1, B2), and the back liner C (C1, C2). The splicing is detected, and a sheet splicing signal is output to the control device 55. Based on the splicing signal input from the splicing portion detection device 51, the control device 55 controls the conveying speed of the front liner A, the core B, and the back liner C, the conveying distance from the splicing position to the cutoff 25, and From this, the time required for the paper spliced portion as the defective portion to reach the cutoff 25 is calculated. Further, the control device 55 similarly calculates the arrival time from the cutoff 25 to the defective product discharging device 26.
　片段不良検出装置５２は、プレヒータ２０またはグルーマシン２１に配置される。片段不良検出装置５２は、裏ライナＣに波形加工された中芯Ｂが貼り付けられて形成された片面段ボールシートＤにおいて、中芯Ｂの変形を検出する。片段不良検出装置５２は、例えば、撮像装置を有し、良品である中芯Ｂの撮影画像と、撮像装置により撮像された搬送中の中芯Ｂの撮影画像とを比較することで、中芯Ｂの変形を検出して片面段ボールシートＤの良否を判定する。片段不良検出装置５２は、片面段ボールシートＤの良否判定信号を制御装置５５に出力する。制御装置５５は、片段不良検出装置５２から入力された良否判定信号に基づいて、片面段ボールシートＤの搬送速度と、片段不良検出装置５２からカットオフ２５までの搬送距離とから、不良部がカットオフ２５に到達する時間を算出する。さらに、制御装置５５は、同様に、カットオフ２５から不良品排出装置２６までの到達時間を算出する。 The single-stage failure detection device 52 is disposed in the preheater 20 or the glue machine 21. The single-stage defect detection device 52 detects the deformation of the core B in the single-sided cardboard sheet D formed by attaching the corrugated core B to the back liner C. The one-stage defect detection device 52 includes, for example, an imaging device, and compares the captured image of the core B which is a good product with the captured image of the core B being conveyed, which is captured by the imaging device. The quality of the single-faced cardboard sheet D is determined by detecting the deformation of B. The single-stage defect detection device 52 outputs a pass / fail judgment signal of the single-sided cardboard sheet D to the control device 55. The control unit 55 cuts the defective portion based on the transport speed of the single-sided corrugated cardboard sheet D and the transport distance from the single-stage defect detection device 52 to the cutoff 25 based on the pass / fail judgment signal input from the single-stage defect detection device 52. The time to reach OFF 25 is calculated. Further, the control device 55 similarly calculates the arrival time from the cutoff 25 to the defective product discharging device 26.
　品質検査装置５３は、スリッタスコアラ２４とカットオフ２５との間で、搬送される板状の両面段ボールシートＦの上方及び下方に配置される。品質検査装置５３は、例えば、撮像装置を有し、撮像装置による撮像画像に基づいて、板状の両面段ボールシートＦの形状や寸法、プレプリントライナを使用しているときには印刷状態を検査する。具体的には、良品である板状の両面段ボールシートＦと、撮像装置により撮像された搬送中の板状の両面段ボールシートＦの撮影画像とを比較することで、板状の両面段ボールシートＦの良否を判定する。制御装置５５は、品質検査装置５３から入力された良否判定信号に基づいて、板状の両面段ボールシートＦの搬送速度と、品質検査装置５３からカットオフ２５までの搬送距離とから、不良部がカットオフ２５に到達する時間を算出する。さらに、制御装置５５は、同様に、カットオフ２５から不良品排出装置２６までの到達時間を算出する。 The quality inspection device 53 is disposed between the slitter scorer 24 and the cutoff 25 above and below the plate-shaped double-faced corrugated cardboard sheet F to be conveyed. The quality inspection device 53 includes, for example, an imaging device, and inspects the shape and dimensions of the plate-shaped double-faced corrugated cardboard sheet F and the printing state when a preprint liner is used, based on an image captured by the imaging device. Specifically, by comparing a non-defective plate-shaped double-faced corrugated cardboard sheet F with a photographed image of the plate-shaped double-faced corrugated cardboard sheet F being conveyed captured by the imaging device, the plate-shaped double-faced corrugated cardboard sheet F is compared. Is determined. Based on the pass / fail judgment signal input from the quality inspection device 53, the control device 55 determines the defective portion based on the transport speed of the plate-shaped double-faced corrugated cardboard sheet F and the transport distance from the quality inspection device 53 to the cutoff 25. The time to reach the cutoff 25 is calculated. Further, the control device 55 similarly calculates the arrival time from the cutoff 25 to the defective product discharging device 26.
　不良検出スイッチ５４は、スリッタスコアラ２４やカットオフ２５の周辺などに配置される。不良検出スイッチ５４は、作業者により操作可能であり、作業者の視認により搬送中の両面段ボールシートＥ，Ｆに不良部（例えば、傷、汚れ、糊かす付着）を見つけたときに操作する。制御装置５５は、不良検出スイッチ５４から入力された不良部検出信号に基づいて、前述と同様に、不良部がカットオフ２５に到達する時間を算出する。さらに、制御装置５５は、同様に、カットオフ２５から不良品排出装置２６までの到達時間を算出する。 The failure detection switch 54 is arranged around the slitter scorer 24 and the cutoff 25. The defect detection switch 54 is operable by an operator, and is operated when a defective portion (for example, a scratch, dirt, or adhesive residue) is found on the double-faced cardboard sheets E and F being conveyed by the operator. The control device 55 calculates the time required for the defective portion to reach the cutoff 25 in the same manner as described above, based on the defective portion detection signal input from the defect detection switch 54. Further, the control device 55 similarly calculates the arrival time from the cutoff 25 to the defective product discharging device 26.
　制御装置５５は、不良検出装置としての紙継ぎ部検出装置５１と片段不良検出装置５２と品質検査装置５３と不良検出スイッチ５４との検出結果に応じて不良品排出装置２６を作動する。この場合、制御装置５５は、紙継ぎ部検出装置５１からの紙継ぎ信号、片段不良検出装置５２や品質検査装置５３からの良否判定信号、不良検出スイッチ５４からの不良部検出信号に基づいて、不良部がカットオフ２５に到達する時間を算出している。さらに、制御装置５５は、カットオフ２５から不良品排出装置２６までの到達時間を算出している。そのため、制御装置５５は、不良部が不良品排出装置２６に到達したとき、不良品排出装置２６を作動して不良部を含む板状の両面段ボールシートＦ０を搬送ラインから外部に排出する。 The control device 55 operates the defective product discharging device 26 according to the detection results of the paper spliced portion detection device 51, the single-stage defect detection device 52, the quality inspection device 53, and the defect detection switch 54 as the defect detection devices. In this case, the control device 55 is configured to output a splicing signal from the splicing portion detection device 51, a pass / fail judgment signal from the one-stage defect detection device 52 or the quality inspection device 53, and a defective portion detection signal from the defect detection switch 54, The time required for the defective portion to reach the cutoff 25 is calculated. Further, the control device 55 calculates the arrival time from the cutoff 25 to the defective product discharging device 26. Therefore, when the defective portion reaches the defective product discharging device 26, the control device 55 operates the defective product discharging device 26 to discharge the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion to the outside from the transport line.
　また、制御装置５５は、板状の両面段ボールシートＦ０の長さＬが不良品排出装置２６の排出許容長さＬｄより長いときに、不良部を含む連続する両面段ボールシートＥを排出許容長さＬｄより短い長さに切断するようにカットオフ２５を制御する。即ち、不良品排出装置２６は、不良部を含む板状の両面段ボールシートＦ０を第１搬送コンベア６４から振分ロール６８によって第１排出コンベア６６に送り、第１排出コンベア６６から搬送ラインに直交する第２排出コンベア６７により外部に排出する。第２排出コンベア６７は、図３の紙面直交方向に向けて、不良部を含む板状の両面段ボールシートＦ０を搬送するものであり、幅方向に排出許容長さＬｄが設定されている。そのため、カットオフ２５による不良部を含む板状の両面段ボールシートＦ０の切断長Ｌが排出許容長さＬｄより長いと、そのままでは第２排出コンベア６７により不良部を含む板状の両面段ボールシートＦ０を外部に排出することができない。本実施形態では、不良部を含む連続する両面段ボールシートＥを排出許容長さＬｄより短い長さに切断する。つまり、排出許容長さＬｄよりも長い不良部を含む板状の両面段ボールシートＦ０は、カットオフ２５により複数のシートに切断されて排出される。 When the length L of the plate-shaped double-faced corrugated cardboard sheet F0 is longer than the allowable discharge length Ld of the defective product discharging device 26, the control device 55 outputs the continuous double-sided corrugated cardboard sheet E including the defective portion to the allowable discharge length. The cutoff 25 is controlled so as to cut to a length shorter than Ld. That is, the defective product discharging device 26 sends the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion from the first transport conveyor 64 to the first discharge conveyor 66 by the distribution roll 68, and orthogonally intersects the transport line with the first discharge conveyor 66. And discharged to the outside by the second discharge conveyor 67. The second discharge conveyor 67 conveys the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion in the direction perpendicular to the paper surface of FIG. 3, and has a discharge allowable length Ld set in the width direction. Therefore, if the cut length L of the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion due to the cut-off 25 is longer than the discharge allowable length Ld, the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion by the second discharge conveyor 67 as it is. Cannot be discharged outside. In the present embodiment, the continuous double-faced corrugated cardboard sheet E including the defective portion is cut into a length shorter than the allowable discharge length Ld. That is, the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion longer than the discharge allowable length Ld is cut into a plurality of sheets by the cutoff 25 and discharged.
　ここで、プレプリント切断モードにおけるカットオフ２５の作動について説明する。図４は、プレプリント切断モードにおける通常時のカットオフの作動を表す概略図、図５は、プレプリント切断モードにおける不良部発生時のカットオフの作動を表す概略図である。 Here, the operation of the cutoff 25 in the preprint cutting mode will be described. FIG. 4 is a schematic diagram illustrating a normal cutoff operation in the preprint cutting mode, and FIG. 5 is a schematic diagram illustrating a cutoff operation when a defective portion occurs in the preprint cutting mode.
　図２および図４に示すように、プレプリント切断モードとは、表ライナＡとして、表面に絵柄や文字と共に切断用マークＭが印刷されたプレプリントライナを用いて板状の両面段ボールシートＦを製造するモードである。このプレプリント切断モードにて、マーク検出装置７５は、マークセンサ７７が板状の両面段ボールシートＦの下面側に印刷されている切断用マークＭを検出し、カットオフ制御装置５６にマーク検出信号を出力する。カットオフ制御装置５６は、マーク検出信号に基づいて、連続する両面段ボールシートＥの搬送速度と、マーク検出装置７５からカットオフ２５までの搬送距離とから、連続する両面段ボールシートＥの切断用マークＭがカットオフ２５による切断位置に到達する時間を算出し、両面段ボールシートＦを切断するナイフシリンダの回転方向位置を制御して切断用マークＭの位置で切断する。 As shown in FIGS. 2 and 4, the preprint cutting mode is a method in which a plate-shaped double-faced corrugated cardboard sheet F is used as a front liner A using a preprint liner on which a cutting mark M is printed on the surface together with a pattern or character. This is the manufacturing mode. In the preprint cutting mode, the mark detecting device 75 detects the cutting mark M printed on the lower surface side of the plate-shaped double-faced corrugated cardboard sheet F by the mark sensor 77 and sends a mark detection signal to the cut-off control device 56. Is output. Based on the mark detection signal, the cutoff control device 56 determines a cutting mark of the continuous double-faced cardboard sheet E based on the transport speed of the continuous double-faced cardboard sheet E and the transport distance from the mark detection device 75 to the cutoff 25. The time required for M to reach the cutting position by the cutoff 25 is calculated, and the cutting position is controlled at the position of the cutting mark M by controlling the rotational direction position of the knife cylinder that cuts the double-faced cardboard sheet F.
　長さＬを有する板状の両面段ボールシートＦを製造するとき、カットオフ２５による切断長は、第１切断長Ｌとなる。切断長が第１切断長Ｌであるとき、連続する両面段ボールシートＥは、第１切断長Ｌごとに切断用マークＭが印刷されている。そのため、カットオフ制御装置５６は、マーク検出装置７５からのマーク検出信号に基づいて、所定のタイミングでカットオフ２５を作動し、連続する両面段ボールシートＥを切断用マークＭの位置で切断（切断線ＣＬ）する。なお、マーク検出装置７５が切断用マークＭを検出できなかったとき、カットオフ制御装置５６は、事前に第１切断長Ｌの長さがわかっていることから、切断しないことを回避するため、第１切断長Ｌに余裕長Ｌｍを加算した長さでカットオフ２５を作動し、連続する両面段ボールシートＥを切断する。 と き When manufacturing the plate-shaped double-faced corrugated cardboard sheet F having the length L, the cut length by the cutoff 25 is the first cut length L. When the cutting length is the first cutting length L, the continuous double-faced corrugated cardboard sheet E is printed with the cutting mark M for each first cutting length L. Therefore, the cutoff control device 56 activates the cutoff 25 at a predetermined timing based on the mark detection signal from the mark detection device 75, and cuts (cuts) the continuous double-faced cardboard sheet E at the position of the cutting mark M. Line CL). Note that when the mark detection device 75 cannot detect the cutting mark M, the cutoff control device 56 knows the length of the first cutting length L in advance, so that the cutoff control device 56 prevents The cutoff 25 is operated at a length obtained by adding the margin length Lm to the cutting length L, and the continuous double-faced corrugated cardboard sheet E is cut.
　一方、図２および図５に示すように、例えば、連続する両面段ボールシートＥの紙継ぎ部としての不良部Ｐｆがカットオフ２５に到達したとき、制御装置５５は、紙継ぎ部検出装置５１からの紙継ぎ信号に基づいて、不良品排出装置２６を作動して不良部Ｐｆを含む板状の両面段ボールシートＦ０を搬送ラインから排出する。このとき、制御装置５５は、板状の両面段ボールシートＦの長さが排出許容長さＬｄより長いとき、切断長を第１切断長Ｌから第１切断長Ｌの２分の１（整数ｎ分の１）である第２切断長Ｌ／２に変更する。なお、ここで、整数とは、自然数であり、「０」を除く。 On the other hand, as shown in FIGS. 2 and 5, for example, when the defective portion Pf as a paper seam of the continuous double-faced corrugated cardboard sheet E reaches the cutoff 25, the control device 55 The defective product discharging device 26 is operated based on the paper splicing signal to discharge the plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion Pf from the transport line. At this time, when the length of the plate-shaped double-faced corrugated cardboard sheet F is longer than the discharge allowable length Ld, the control device 55 changes the cutting length from the first cutting length L to half of the first cutting length L (an integer n). It is changed to the second cutting length L / 2, which is (1/1). Here, the integer is a natural number, excluding “0”.
　例えば、第１切断長Ｌが１７００ｍｍであり、排出許容長さＬｄが１６００ｍｍであるとき、不良品排出装置２６は、長さが１７００ｍｍである板状の両面段ボールシートＦ０を搬送ラインから排出することができない。このとき、切断長を第１切断長Ｌから第２切断長Ｌ／２に変更する。第１切断長Ｌ（１７００ｍｍ）の１／２は、８５０ｍｍであり、排出許容長さＬｄ以下となることから、第２切断長を第１切断長Ｌの２分の１とする。また、第１切断長Ｌが３６００ｍｍであり、排出許容長さＬｄが１６００ｍｍであるとき、第１切断長Ｌ（１７００ｍｍ）の１／３は、１２００ｍｍであり、排出許容長さＬｄ以下となることから、第２切断長を第１切断長Ｌの３分の１とする。 For example, when the first cut length L is 1700 mm and the discharge allowable length Ld is 1600 mm, the defective product discharging device 26 discharges a plate-shaped double-faced corrugated cardboard sheet F0 having a length of 1700 mm from the transport line. Can not. At this time, the cutting length is changed from the first cutting length L to the second cutting length L / 2. Since the half of the first cutting length L (1700 mm) is 850 mm, which is equal to or less than the discharge allowable length Ld, the second cutting length is set to one half of the first cutting length L. When the first cut length L is 3600 mm and the discharge allowable length Ld is 1600 mm, one third of the first cut length L (1700 mm) is 1200 mm and is equal to or less than the discharge allowable length Ld. Therefore, the second cut length is set to one third of the first cut length L.
　そのため、カットオフ制御装置５６は、マーク検出装置７５からのマーク検出信号と、紙継ぎ部検出装置５１からの紙継ぎ信号とに基づいて、所定のタイミングでカットオフ２５を作動する。即ち、不良部Ｐｆがカットオフ２５に到達したとき、制御装置５５は、第１切断長Ｌ（１７００ｍｍ）から第２切断長Ｌ／２（８５０ｍｍ）に変更するようにカットオフ制御装置５６に指令する。カットオフ制御装置５６は、カットオフ２５を作動し、カットオフ２５が連続する両面段ボールシートＥを切断した切断用マークＭの位置から、第２切断長Ｌ／２（８５０ｍｍ）だけ離れた位置で連続する両面段ボールシートＥを切断しようとする。ここで、プレプリント切断モードでは、基本的に、カットオフ２５が切断用マークＭの位置で連続する両面段ボールシートＥを切断するものである。しかし、第２切断長Ｌ／２（８５０ｍｍ）の位置に切断用マークＭがないことから、カットオフ制御装置５６は、切断しないことを回避するため、第２切断長Ｌ／２に余裕長Ｌｍ（例えば、１０ｍｍ）を加算した長さ（８６０ｍｍ）でカットオフ２５を作動し、連続する両面段ボールシートＥを切断する。 Therefore, the cutoff control device 56 operates the cutoff 25 at a predetermined timing based on the mark detection signal from the mark detection device 75 and the paper splice signal from the paper splice portion detection device 51. That is, when the defective portion Pf reaches the cutoff 25, the control device 55 instructs the cutoff control device 56 to change the first cut length L (1700 mm) to the second cut length L / 2 (850 mm). I do. The cut-off control device 56 operates the cut-off 25 and at a position separated by a second cutting length L / 2 (850 mm) from the position of the cutting mark M obtained by cutting the double-faced corrugated cardboard sheet E where the cut-off 25 is continuous. An attempt is made to cut a continuous double-faced cardboard sheet E. Here, in the preprint cutting mode, basically, the double-faced corrugated cardboard sheet E in which the cutoff 25 is continuous at the position of the cutting mark M is cut. However, since there is no cutting mark M at the position of the second cutting length L / 2 (850 mm), the cut-off control device 56 has a margin Lm in the second cutting length L / 2 to avoid not cutting. The cut-off 25 is operated at the length (860 mm) to which (for example, 10 mm) is added, and the continuous double-faced corrugated cardboard sheet E is cut.
　その後、制御装置５５は、プレプリントモードでは切断用マークＭで再び切断するため、第２切断長のｎ倍（第２切断長Ｌ／２とした場合２倍）の不良部の長さ分が継続して搬送されなければ、連続する両面段ボールシートＥの切断長を第２切断長Ｌ／２から第１切断長Ｌに変更する。すると、カットオフ制御装置５６は、マーク検出装置７５からのマーク検出信号に基づいて、所定のタイミングでカットオフ２５を作動し、連続する両面段ボールシートＥを切断用マークＭの位置で切断（切断線ＣＬ）する。この場合、その前に、切断用マークＭから第２切断長Ｌ／２＋余裕長Ｌｍだけ離れた位置（８６０ｍｍ）で連続する両面段ボールシートＥを切断していることから、このときの切断長は、第２切断長Ｌ／２から余裕長Ｌｍ（例えば、１０ｍｍ）を減算した長さ（８４０ｍｍ）となる。 Thereafter, the controller 55 cuts again at the cutting mark M in the preprint mode, so that the length of the defective portion n times the second cutting length (twice when the second cutting length L / 2) is used. If the sheet is not continuously conveyed, the cutting length of the continuous double-faced cardboard sheet E is changed from the second cutting length L / 2 to the first cutting length L. Then, the cutoff control device 56 activates the cutoff 25 at a predetermined timing based on the mark detection signal from the mark detection device 75, and cuts (cuts) the continuous double-faced corrugated cardboard sheet E at the position of the cutting mark M. Line CL). In this case, since the continuous double-faced corrugated cardboard sheet E is cut at a position (860 mm) away from the cutting mark M by the second cutting length L / 2 + the extra length Lm, the cutting length at this time is , The length obtained by subtracting the margin length Lm (for example, 10 mm) from the second cut length L / 2 (840 mm).
　なお、本実施形態のシートの不良除去装置５０は、上述したプレプリント切断モードにだけ対応するものではなく、ノーマル切断モードにも対応することができる。以下、本実施形態のシートの不良除去方法について説明する。図６は、ノーマル切断モードからプレプリント切断モードへの切換時における不良除去装置の作動を表すタイムチャート、図７は、プレプリント切断モードにおける不良除去装置の作動を表すタイムチャート、図８は、プレプリント切断モードからノーマル切断モードへの切換時における不良除去装置の作動を表すタイムチャートである。 Note that the sheet defect removing device 50 of the present embodiment is not only compatible with the above-described preprint cutting mode, but can also be compatible with the normal cutting mode. Hereinafter, a method for removing a sheet defect according to the present embodiment will be described. FIG. 6 is a time chart showing the operation of the defect removing device when switching from the normal cutting mode to the preprint cutting mode, FIG. 7 is a time chart showing the operation of the defect removing device in the preprint cutting mode, and FIG. 6 is a time chart illustrating an operation of the defect removing device when switching from a preprint cutting mode to a normal cutting mode.
　本実施形態のシートの不良除去方法は、波形加工された中芯Ｂの両側にライナＡ，Ｃを貼り合わせて形成される連続する両面段ボールシートＥを幅方向に沿って予め設定された所定長さＬに切断する工程と、両面段ボールシートＥ，Ｆの不良部Ｐｆを検出する工程と、板状の両面段ボールシートＦの長さＬが排出許容長さＬｄより長いときに不良部Ｐｆを含む連続する両面段ボールシートＥを排出許容長さＬｄより短い長さに切断する工程と、排出許容長さＬｄより短い長さに切断された板状の両面段ボールシートＦ０を搬送ラインから排出する工程とを有する。 The sheet defect removing method of the present embodiment is a method of forming a continuous double-faced corrugated cardboard sheet E formed by laminating liners A and C on both sides of a corrugated core B to a predetermined length along a width direction. Cutting to a length L, detecting a defective portion Pf of the double-faced corrugated cardboard sheets E and F, and including the defective portion Pf when the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld. A step of cutting the continuous double-faced corrugated cardboard sheet E to a length shorter than the discharge allowable length Ld, and a step of discharging the plate-shaped double-faced corrugated cardboard sheet F0 cut to a length shorter than the discharge allowable length Ld from the transport line. Having.
　制御装置５５は、第１切断長に基づいてカットオフ２５を作動するノーマル切断モードと、切断用マークＭに基づいてカットオフ２５を作動するプレプリント切断モードとを有し、切換可能となっている。ここで、ノーマル切断モードとは、表ライナＡとして、表面に絵柄や文字、切断用マークＭが印刷されていないノーマルライナを用いて板状の両面段ボールシートＦを製造するモードである。このノーマル切断モードにて、制御装置５５は、板状の両面段ボールシートＦの第１切断長が入力されており、この第１切断長に基づいて、連続する両面段ボールシートＥの搬送速度から切断位置を算出する。 The control device 55 has a normal cutting mode for operating the cutoff 25 based on the first cutting length and a preprint cutting mode for operating the cutoff 25 based on the cutting mark M, and is switchable. I have. Here, the normal cutting mode is a mode in which a plate-like double-faced corrugated cardboard sheet F is manufactured using a normal liner having no surface pattern, characters, or cutting marks M printed thereon as the front liner A. In the normal cutting mode, the control device 55 inputs the first cutting length of the plate-shaped double-faced corrugated cardboard sheet F, and cuts from the transport speed of the continuous double-faced corrugated cardboard sheet E based on the first cutting length. Calculate the position.
　図２および図６に示すように、ノーマル切断モードからプレプリント切断モードに切り換わるとき、表ライナＡは、無地のノーマルライナから印刷済のプレプリントライナに紙継ぎされることから、この紙継ぎ部が不良部Ｐｆとなり、不良部Ｐｆを含む板状の両面段ボールシートＦ０が発生する。なお、以下の説明では、板状の両面段ボールシートＦの長さＬが排出許容長さＬｄよりも長いものとして説明する。 As shown in FIGS. 2 and 6, when switching from the normal cutting mode to the preprint cutting mode, the front liner A is spliced from the plain normal liner to the printed preprint liner. The portion becomes a defective portion Pf, and a plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion Pf is generated. In the following description, it is assumed that the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld.
　切断モードがノーマル切断モードであるとき、プレプリント切断モード信号がＯＦＦであり、板状の両面段ボールシートＦの第１切断長Ｌ１であることから、第１切断長Ｌ１ごとにカットオフ２５が作動する。このとき、カットオフ２５が連続する両面段ボールシートＥを切断したタイミングで、カットオフ２５からカットオフ制御装置５６にカット完了信号が出力される。そして、制御装置５５は、不良部（紙継ぎ部）Ｐｆがカットオフ２５に到達する時期を把握しており、この不良部Ｐｆがカットオフ２５に到達する時期より１サイクル手前で、所定の長さ範囲Ｌａにわたって切断長を第１切断長Ｌ１から第２切断長ＬＷ（Ｌ１／２）に切り換える。なお、１サイクルとは、カットオフ２５が第１切断長Ｌ１で１枚の板状の両面段ボールシートＦを切断する長さである。 When the cutting mode is the normal cutting mode, since the preprint cutting mode signal is OFF and the first cutting length L1 of the plate-shaped double-faced corrugated cardboard sheet F, the cutoff 25 is activated for each first cutting length L1. I do. At this time, a cut completion signal is output from the cutoff 25 to the cutoff control device 56 at the timing when the double-faced corrugated cardboard sheet E having the continuous cutoff 25 is cut. The control device 55 knows when the defective portion (paper spliced portion) Pf reaches the cutoff 25, and one cycle before the timing when the defective portion Pf reaches the cutoff 25, and has a predetermined length. The cutting length is switched from the first cutting length L1 to the second cutting length LW (L1 / 2) over the range La. Note that one cycle is a length at which the cutoff 25 cuts one plate-shaped double-faced corrugated cardboard sheet F with the first cutting length L1.
　すると、カットオフ２５は、連続する両面段ボールシートＥを第１切断長Ｌ１で切断した後、第１切断長Ｌ１から第２切断長ＬＷに切り換えられ、不良部Ｐｆを有する連続する両面段ボールシートＥを所定の長さ範囲Ｌａにわたって第２切断長ＬＷで切断する。即ち、カットオフ２５は、連続する両面段ボールシートＥを第１切断長Ｌ１で切断した後、両面段ボールシートＥを第２切断長ＬＷ１（Ｌ１／２＋Ｌｍ）、第２切断長ＬＷ２（Ｌ１／２－Ｌｍ）、第２切断長ＬＷ１（Ｌ１／２＋Ｌｍ）、第２切断長ＬＷ２（Ｌ１／２－Ｌｍ）で切断する。ここで、切断モードがプレプリント切断モードに切り換えられてプレプリント切断モード信号がＯＮになる。 Then, after cutting the continuous double-faced corrugated cardboard sheet E by the first cutting length L1, the cutoff 25 is switched from the first cutting length L1 to the second cutting length LW, and the continuous double-faced corrugated cardboard sheet E having the defective portion Pf is cut. At a second cutting length LW over a predetermined length range La. That is, the cutoff 25 cuts the continuous double-faced corrugated cardboard sheet E at the first cut length L1, and then cuts the double-faced corrugated cardboard sheet E with the second cut length LW1 (L1 / 2 + Lm) and the second cut length LW2 (L1 / 2- Lm), the second cut length LW1 (L1 / 2 + Lm), and the second cut length LW2 (L1 / 2-Lm). Here, the cutting mode is switched to the preprint cutting mode, and the preprint cutting mode signal is turned on.
　このプレプリント切断モードにて、カットオフ２５は、切断用マークＭの位置で作動して連続する両面段ボールシートＥを切断しようとする。しかし、連続する両面段ボールシートＥは、第１切断長Ｌ１で切断された位置から第２切断長ＬＷ１の位置に切断用マークＭがない。そのため、カットオフ制御装置５６は、第２切断長ＬＷに余裕長Ｌｍを加算した第２切断長ＬＷ１の位置でカットオフ２５を作動し、連続する両面段ボールシートＥを切断する。その後、カットオフ制御装置５６は、カットオフ２５を切断用マークＭの位置で作動して連続する両面段ボールシートＥを切断する。このときの切断長は、第２切断長ＬＷから余裕長Ｌｍを減算した第２切断長ＬＷ２となる。また、制御装置５５は、切断長を第１切断長Ｌ１から第２切断長ＬＷに切り換えた後、不良品排出装置２６を作動して不良品排出処理をＯＮとする。 In this preprint cutting mode, the cutoff 25 operates at the position of the cutting mark M to cut the continuous double-faced cardboard sheet E. However, the continuous double-faced corrugated cardboard sheet E does not have the cutting mark M from the position cut by the first cutting length L1 to the position of the second cutting length LW1. Therefore, the cutoff control device 56 operates the cutoff 25 at the position of the second cutting length LW1 obtained by adding the margin length Lm to the second cutting length LW, and cuts the continuous double-faced cardboard sheet E. Thereafter, the cutoff controller 56 operates the cutoff 25 at the position of the cutting mark M to cut the continuous double-faced corrugated cardboard sheet E. The cutting length at this time is the second cutting length LW2 obtained by subtracting the margin length Lm from the second cutting length LW. After switching the cutting length from the first cutting length L1 to the second cutting length LW, the control device 55 operates the defective product discharging device 26 to turn on the defective product discharging process.
　その後、連続する両面段ボールシートＥが搬送され、所定の長さ範囲Ｌａに到達する１サイクル手前で、切断長を第２切断長ＬＷから第１切断長Ｌ２に切り換える。すると、カットオフ制御装置５６は、カットオフ２５を切断用マークＭの位置で作動して連続する両面段ボールシートＥを第１切断長Ｌ２で切断する。また、制御装置５５は、切断長を第２切断長ＬＷから第１切断長Ｌ２に切り換えた後、不良品排出装置２６の作動を停止して不良品排出処理をＯＦＦとする。 Thereafter, the continuous double-faced corrugated cardboard sheet E is conveyed, and the cutting length is switched from the second cutting length LW to the first cutting length L2 one cycle before reaching the predetermined length range La. Then, the cutoff control device 56 operates the cutoff 25 at the position of the cutting mark M to cut the continuous double-faced corrugated cardboard sheet E by the first cutting length L2. After switching the cutting length from the second cutting length LW to the first cutting length L2, the control device 55 stops the operation of the defective product discharging device 26 and turns off the defective product discharging process.
　また、図２および図７に示すように、プレプリント切断モードでは、紙継ぎ部検出装置５１からの紙継ぎ信号の送信時、片段不良検出装置５２や品質検査装置５３からの良否判定信号の送信時、不良検出スイッチ５４からの不良部検出信号の送信時に、不良部Ｐｆを含む板状の両面段ボールシートＦ０が発生する。 As shown in FIGS. 2 and 7, in the preprint cutting mode, when the splicing signal is transmitted from the splicing portion detection device 51, the pass / fail judgment signal is transmitted from the one-stage defect detection device 52 or the quality inspection device 53. At the time, when a defective portion detection signal is transmitted from the defective detection switch 54, a plate-shaped double-faced cardboard sheet F0 including the defective portion Pf is generated.
　切断モードがプレプリント切断モードであるとき、プレプリント切断モード信号がＯＮであり、板状の両面段ボールシートＦの第１切断長Ｌ２であり、カットオフ２５が切断用マークＭの位置で作動して連続する両面段ボールシートＥを切断する。このとき、カットオフ２５が連続する両面段ボールシートＥを切断したタイミングで、カットオフ制御装置５６から制御装置５５にカット完了信号が出力される。そして、制御装置５５は、不良部Ｐｆがカットオフ２５に到達する時期を把握しており、この不良部Ｐｆがカットオフ２５に到達する時期より１サイクル手前で、所定の長さ範囲Ｌｂにわたって切断長を第１切断長Ｌ２から第２切断長ＬＷ（Ｌ２／２）に切り換える。 When the cutting mode is the preprint cutting mode, the preprint cutting mode signal is ON, the first cutting length L2 of the plate-shaped double-faced corrugated cardboard sheet F is set, and the cutoff 25 operates at the position of the cutting mark M. To cut the continuous double-faced cardboard sheet E. At this time, a cut completion signal is output from the cutoff control device 56 to the control device 55 at the timing when the double-faced corrugated cardboard sheet E having the continuous cutoff 25 is cut. The controller 55 knows when the defective portion Pf reaches the cutoff 25, and cuts over a predetermined length range Lb one cycle before the timing when the defective portion Pf reaches the cutoff 25. The length is switched from the first cut length L2 to the second cut length LW (L2 / 2).
　すると、カットオフ２５は、連続する両面段ボールシートＥを切断用マークＭの位置（第１切断長Ｌ２）で切断した後、第２切断長Ｌ２から第２切断長ＬＷに切り換えられ、不良部Ｐｆを有する連続する両面段ボールシートＥを所定の長さ範囲Ｌｂにわたって第２切断長ＬＷで切断する。即ち、カットオフ２５は、連続する両面段ボールシートＥを第１切断長Ｌ２で切断した後、両面段ボールシートＥを第２切断長ＬＷ１（Ｌ１／２＋Ｌｍ）、第２切断長ＬＷ２（Ｌ１／２－Ｌｍ）、第２切断長ＬＷ１（Ｌ１／２＋Ｌｍ）、第２切断長ＬＷ２（Ｌ１／２－Ｌｍ）で切断する。 Then, after cutting the continuous double-faced corrugated cardboard sheet E at the position of the cutting mark M (first cutting length L2), the cutoff 25 is switched from the second cutting length L2 to the second cutting length LW, and the defective portion Pf Is cut at a second cutting length LW over a predetermined length range Lb. That is, the cut-off 25 cuts the continuous double-faced corrugated cardboard sheet E at the first cut length L2, and then cuts the double-faced corrugated cardboard sheet E with the second cut length LW1 (L1 / 2 + Lm) and the second cut length LW2 (L1 / 2- Lm), the second cut length LW1 (L1 / 2 + Lm), and the second cut length LW2 (L1 / 2-Lm).
　しかし、連続する両面段ボールシートＥは、第１切断長Ｌ２で切断された位置から第２切断長ＬＷの位置に切断用マークＭがない。そのため、カットオフ制御装置５６は、第２切断長ＬＷに余裕長Ｌｍを加算した第２切断長ＬＷ１の位置でカットオフ２５を作動し、連続する両面段ボールシートＥを切断する。その後、カットオフ制御装置５６は、カットオフ２５を切断用マークＭの位置で作動して連続する両面段ボールシートＥを切断する。このときの切断長は、第２切断長ＬＷから余裕長Ｌｍを減算した第２切断長ＬＷ２となる。同様に、カットオフ制御装置５６は、連続する両面段ボールシートＥに対して、第２切断長ＬＷに余裕長Ｌｍを加算した第２切断長ＬＷ１の位置と、第２切断長ＬＷから余裕長Ｌｍを減算した第２切断長ＬＷ２の位置でカットオフ２５を作動し、連続する両面段ボールシートＥを切断する。また、制御装置５５は、切断長を第１切断長Ｌ２から第２切断長ＬＷ１に切り換えた後、不良品排出装置２６を作動して不良品排出処理をＯＮとする。 However, the continuous double-faced corrugated cardboard sheet E does not have the cutting mark M at the position of the second cutting length LW from the position cut by the first cutting length L2. Therefore, the cutoff control device 56 operates the cutoff 25 at the position of the second cutting length LW1 obtained by adding the margin length Lm to the second cutting length LW, and cuts the continuous double-faced cardboard sheet E. Thereafter, the cutoff controller 56 operates the cutoff 25 at the position of the cutting mark M to cut the continuous double-faced corrugated cardboard sheet E. The cutting length at this time is the second cutting length LW2 obtained by subtracting the margin length Lm from the second cutting length LW. Similarly, the cut-off control device 56 determines the position of the second cut length LW1 obtained by adding the margin Lm to the second cut length LW, and the margin Lm from the second cut length LW for the continuous double-faced corrugated cardboard sheet E. The cut-off 25 is operated at the position of the second cutting length LW2 from which is subtracted, and the continuous double-faced corrugated cardboard sheet E is cut. After switching the cutting length from the first cutting length L2 to the second cutting length LW1, the control device 55 operates the defective product discharging device 26 to turn on the defective product discharging process.
　その後、連続する両面段ボールシートＥが搬送され、所定の長さ範囲Ｌｂに到達する１サイクル手前で、切断長を第２切断長ＬＷから第１切断長Ｌ２に切り換える。すると、カットオフ制御装置５６は、カットオフ２５を切断用マークＭの位置で作動して連続する両面段ボールシートＥを第１切断長Ｌ２で切断する。また、制御装置５５は、切断長を第２切断長ＬＷから第１切断長Ｌ２に切り換えた後、不良品排出装置２６の作動を停止して不良品排出処理をＯＦＦとする。この場合、制御装置５５は、不良部の切断後、通常の切断に切り替えるにあたって、第２切断長のｎ倍の不良部の長さ分（ＬＷ×ｎ×ｍ：ｍは、不良部Ｐｆの長さ範囲Ｌｂを第１切断長Ｌで割った商を切り上げた整数）切断することによって、カットオフ２５が再び切断用マークＭの位置にて作動する。 (4) Thereafter, the continuous double-faced corrugated cardboard sheet E is conveyed, and the cut length is switched from the second cut length LW to the first cut length L2 one cycle before reaching the predetermined length range Lb. Then, the cutoff control device 56 operates the cutoff 25 at the position of the cutting mark M to cut the continuous double-faced corrugated cardboard sheet E by the first cutting length L2. After switching the cutting length from the second cutting length LW to the first cutting length L2, the control device 55 stops the operation of the defective product discharging device 26 and turns off the defective product discharging process. In this case, the control device 55 switches the cutting to the normal cutting after cutting the defective portion, and the length (LW × n × m: m is the length of the defective portion Pf) of n times the second cutting length. The cutoff 25 operates again at the position of the cutting mark M by performing cutting (an integer obtained by rounding up a quotient obtained by dividing the range Lb by the first cutting length L).
　更に、図２および図８に示すように、プレプリント切断モードからノーマル切断モードに切換るとき、表ライナＡは、印刷済のプレプリントライナから無地のノーマルライナに紙継ぎされることから、この紙継ぎ部が不良部Ｐｆとなり、不良部Ｐｆを含む板状の両面段ボールシートＦ０が発生する。 Further, as shown in FIGS. 2 and 8, when switching from the preprint cutting mode to the normal cutting mode, the front liner A is spliced from the printed preprint liner to the plain normal liner. The spliced portion becomes a defective portion Pf, and a plate-shaped double-faced corrugated cardboard sheet F0 including the defective portion Pf is generated.
　切断モードがプレプリント切断モードであるとき、プレプリント切断モード信号がＯＮであり、板状の両面段ボールシートＦの第１切断長Ｌ２であり、カットオフ２５が切断用マークＭの位置で作動して連続する両面段ボールシートＥを切断する。このとき、カットオフ２５が連続する両面段ボールシートＥを切断したタイミングで、カットオフ制御装置５６から制御装置５５にカット完了信号が出力される。そして、制御装置５５は、不良部Ｐｆがカットオフ２５に到達する時期を把握しており、この不良部Ｐｆがカットオフ２５に到達する時期より１サイクル手前で、所定の長さ範囲Ｌｃにわたって切断長を第１切断長Ｌ２から第２切断長ＬＷ（Ｌ２／２）に切り換えると共に、切断モードがノーマル切断モードに切り換えられてプレプリント切断モード信号がＯＦＦになる。 When the cutting mode is the preprint cutting mode, the preprint cutting mode signal is ON, the first cutting length L2 of the plate-shaped double-faced corrugated cardboard sheet F is set, and the cutoff 25 operates at the position of the cutting mark M. To cut the continuous double-faced cardboard sheet E. At this time, a cut completion signal is output from the cutoff control device 56 to the control device 55 at the timing when the double-faced corrugated cardboard sheet E having the continuous cutoff 25 is cut. The controller 55 knows the time when the defective portion Pf reaches the cutoff 25, and cuts over a predetermined length range Lc one cycle before the time when the defective portion Pf reaches the cutoff 25. The length is switched from the first cutting length L2 to the second cutting length LW (L2 / 2), the cutting mode is switched to the normal cutting mode, and the preprint cutting mode signal is turned off.
　すると、カットオフ２５は、連続する両面段ボールシートＥを切断用マークＭの位置（第１切断長Ｌ２）で切断した後、第１切断長Ｌ２から第２切断長ＬＷに切り換えられ、不良部Ｐｆを有する連続する両面段ボールシートＥを所定の長さ範囲Ｌｃにわたって第２切断長ＬＷで切断する。即ち、カットオフ２５は、連続する両面段ボールシートＥを第１切断長Ｌ２で切断した後、両面段ボールシートＥを第２切断長ＬＷ（Ｌ２／２）、第２切断長ＬＷ（Ｌ２／２）で切断する。ここで、切断モードがノーマル切断モードであることから、カットオフ制御装置５６は、第１切断長Ｌ２から第２切断長ＬＷに切り換えられたとき、カットオフ２５を作動し、連続する両面段ボールシートＥを第２切断長ＬＷで２回切断する。また、制御装置５５は、切断長を第１切断長Ｌ２から第２切断長ＬＷに切り換えた後、不良品排出装置２６を作動して不良品排出処理をＯＮとする。 Then, after cutting the continuous double-faced corrugated cardboard sheet E at the position of the cutting mark M (first cutting length L2), the cutoff 25 is switched from the first cutting length L2 to the second cutting length LW, and the defective portion Pf Is cut at a second cutting length LW over a predetermined length range Lc. That is, the cut-off 25 cuts the continuous double-faced corrugated cardboard sheet E at the first cut length L2, and then cuts the double-faced corrugated cardboard sheet E with the second cut length LW (L2 / 2) and the second cut length LW (L2 / 2). Disconnect with Here, since the cutting mode is the normal cutting mode, the cutoff control device 56 activates the cutoff 25 when the first cutting length L2 is switched to the second cutting length LW, and the continuous double-faced corrugated cardboard sheet is cut. E is cut twice with the second cutting length LW. After switching the cutting length from the first cutting length L2 to the second cutting length LW, the control device 55 operates the defective product discharging device 26 to turn on the defective product discharging process.
　その後、連続する両面段ボールシートＥが搬送され、所定の長さ範囲Ｌｃに到達する１サイクル手前で、切断長を第２切断長ＬＷから第１切断長Ｌ３に切り換える。すると、カットオフ制御装置５６は、第１切断長Ｌ３ごとにカットオフ２５を作動して連続する両面段ボールシートＥを第１切断長Ｌ３で切断する。また、制御装置５５は、切断長を第２切断長ＬＷから第１切断長Ｌ３に切り換えた後、不良品排出装置２６の作動を停止して不良品排出処理をＯＦＦとする。 Thereafter, the continuous double-faced corrugated cardboard sheet E is conveyed, and the cut length is switched from the second cut length LW to the first cut length L3 one cycle before reaching the predetermined length range Lc. Then, the cutoff control device 56 operates the cutoff 25 for each first cutting length L3 to cut the continuous double-faced corrugated cardboard sheet E at the first cutting length L3. After switching the cutting length from the second cutting length LW to the first cutting length L3, the controller 55 stops the operation of the defective product discharging device 26 and turns off the defective product discharging process.
　このように本実施形態のシートの不良除去装置にあっては、連続する両面段ボールシートＥを幅方向に沿って切断するカットオフ（切断装置）２５と、両面段ボールシートＥ，Ｆの不良部Ｐｆを検出する不良検出装置としての紙継ぎ部検出装置５１、片段不良検出装置５２、品質検査装置５３、不良検出スイッチ５４と、不良部Ｐｆを含む板状の両面段ボールシートＦを搬送ラインから排出する不良品排出装置２６と、不良検出装置の検出結果に応じて不良品排出装置２６を作動すると共に板状の両面段ボールシートＦの長さＬが不良品排出装置２６の排出許容長さＬｄより長いときに不良部Ｐｆを含む両面段ボールシートＦを排出許容長さＬｄより短い長さに切断するようにカットオフ２５を制御する制御装置５５およびカットオフ制御装置５６とを備える。 As described above, in the sheet defect removing apparatus of the present embodiment, the cutoff (cutting device) 25 that cuts the continuous double-faced corrugated cardboard sheet E along the width direction, and the defective portion Pf of the double-faced corrugated cardboard sheets E and F Part detecting device 51, a single-stage defect detecting device 52, a quality inspection device 53, a defect detecting switch 54, and a plate-shaped double-faced corrugated cardboard sheet F including a defective portion Pf are discharged from the transport line. The defective discharge device 26 and the defective discharge device 26 are operated in accordance with the detection result of the defect detection device, and the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld of the defective discharge device 26. A control device 55 for controlling the cutoff 25 so as to cut the double-faced corrugated cardboard sheet F sometimes including the defective portion Pf to a length shorter than the allowable discharge length Ld, and cutoff control And a location 56.
　従って、制御装置５５は、板状の両面段ボールシートＦの長さＬが不良品排出装置２６の排出許容長さＬｄより長いときにカットオフ２５を作動し、不良部Ｐｆを含む両面段ボールシートＥを排出許容長さＬｄより短い長さに切断する。すると、不良部Ｐｆを含む両面段ボールシートＦ０は、排出許容長さＬｄより短くなり、不良部Ｐｆを含む両面段ボールシートＦ０を不良品排出装置２６により搬送ラインから適正に排出することができる。その結果、両面段ボールシートＦの長さに拘わらず不良品である両面段ボールシートＦ０を適正に搬送ラインから除去して作業効率の向上を図ることができる。 Accordingly, the control device 55 activates the cutoff 25 when the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld of the defective product discharge device 26, and the double-faced corrugated cardboard sheet E including the defective portion Pf. Is cut to a length shorter than the allowable discharge length Ld. Then, the double-faced corrugated cardboard sheet F0 including the defective portion Pf becomes shorter than the discharge allowable length Ld, and the double-faced corrugated cardboard sheet F0 including the defective portion Pf can be properly discharged from the transport line by the defective product discharging device 26. As a result, regardless of the length of the double-faced corrugated paperboard sheet F, the defective double-faced corrugated paperboard sheet F0 can be properly removed from the transport line to improve the working efficiency.
　本実施形態のシートの不良除去装置では、制御装置５５は、板状の両面段ボールシートＦの長さが排出許容長さＬｄより長いとき、不良部Ｐｆを含む両面段ボールシートＦを所定長さＬ以上の長さ範囲Ｌａ，Ｌｂ，Ｌｃにわたって排出許容長さＬｄより短い長さに切断するようにカットオフ２５を作動する。従って、不良部Ｐｆを含む両面段ボールシートＦを所定長さＬ以上の長さ範囲Ｌａ，Ｌｂ，Ｌｃにわたって短い長さに切断することから、不良部Ｐｆを含む両面段ボールシートＦ０を適切に搬送ラインから排出することができる。 In the sheet defect removing device of the present embodiment, when the length of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld, the control device 55 moves the double-faced corrugated cardboard sheet F including the defective portion Pf to a predetermined length L. The cut-off 25 is operated so as to cut to a length shorter than the allowable discharge length Ld over the above length ranges La, Lb, Lc. Therefore, the double-faced corrugated cardboard sheet F including the defective portion Pf is cut into a short length over the length range La, Lb, Lc that is equal to or longer than the predetermined length L. Can be discharged from
　本実施形態のシートの不良除去装置では、カットオフ２５は、連続する両面段ボールシートＥを幅方向に沿って予め設定された所定の第１切断長Ｌに切断することで板状の両面段ボールシートＦを形成するものであり、制御装置５５は、板状の両面段ボールシートＦの長さＬが排出許容長さＬｄより長いとき、不良部Ｐｆを含む両面段ボールシートＦの切断長を第１切断長Ｌの整数分の１である第２切断長Ｌ／ｎに変更する。従って、カットオフ２５は、連続する両面段ボールシートＥを第１切断長Ｌに切断して板状の両面段ボールシートＦを形成しており、連続する両面段ボールシートＥに不良部Ｐｆがあり、且つ、板状の両面段ボールシートＦの長さＬが排出許容長さＬｄより長いとき、切断長を第１切断長Ｌより短い第２切断長Ｌ／ｎに変更する。そのため、不良部Ｐｆを含む両面段ボールシートＦ０は、排出許容長さＬｄより短く切断されることとなり、不良品排出装置２６により容易に排出することができる。 In the sheet defect removing apparatus of the present embodiment, the cut-off 25 cuts the continuous double-faced corrugated cardboard sheet E to a predetermined first cutting length L set in advance in the width direction to form a plate-shaped double-faced corrugated cardboard sheet. When the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the discharge allowable length Ld, the controller 55 sets the cut length of the double-faced corrugated cardboard sheet F including the defective portion Pf to the first cut. The length is changed to the second cut length L / n, which is an integer fraction of the length L. Therefore, the cut-off 25 cuts the continuous double-faced cardboard sheet E to the first cutting length L to form a plate-like double-faced cardboard sheet F, and the continuous double-faced cardboard sheet E has a defective portion Pf, and When the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the discharge allowable length Ld, the cutting length is changed to the second cutting length L / n shorter than the first cutting length L. Therefore, the double-faced corrugated cardboard sheet F0 including the defective portion Pf is cut shorter than the discharge allowable length Ld, and can be easily discharged by the defective product discharge device 26.
　本実施形態のシートの不良除去装置では、制御装置５５は、不良部Ｐｆを含む両面段ボールシートＥを第２切断長Ｌ／ｎで整数分だけ切断した後、第２切断長Ｌ／ｎから第１切断長Ｌに変更する。従って、不良部Ｐｆを含む両面段ボールシートＥを排出許容長さＬｄより短く切断して排出した後、第２切断長Ｌ／ｎから第１切断長Ｌに戻す。そのため、カットオフ２５は、連続する両面段ボールシートＥを所定の第１切断長Ｌに切断して板状の両面段ボールシートＦを連続して形成することができる。 In the sheet defect removing device of the present embodiment, the control device 55 cuts the double-faced corrugated cardboard sheet E including the defective portion Pf by the second cutting length L / n by an integer, and then cuts the second cutting length L / n from the second cutting length L / n. Change to one cutting length L. Therefore, after the double-faced corrugated cardboard sheet E including the defective portion Pf is cut shorter than the discharge allowable length Ld and discharged, the second cut length L / n is returned to the first cut length L. Therefore, the cut-off 25 can cut the continuous double-faced corrugated cardboard sheet E to a predetermined first cutting length L to continuously form the plate-shaped double-faced corrugated cardboard sheet F.
　本実施形態のシートの不良除去装置では、制御装置５５は、第１切断長Ｌから第２切断長Ｌ／ｎに変更した後、両面段ボールシートＦに不良部Ｐｆがないときは、第２切断長Ｌ／ｎから第１切断長Ｌに変更する。従って、不良部Ｐｆを含む両面段ボールシートＦ０を短く切断して排出した後、両面段ボールシートＦに不良部Ｐｆがないとき、第２切断長Ｌ／ｎから第１切断長Ｌに戻す。そのため、カットオフ２５は、連続する両面段ボールシートＥを所定の第１切断長Ｌに切断して板状の両面段ボールシートＦを連続して形成することができる。 In the sheet defect removing apparatus of the present embodiment, the controller 55 changes the first cutting length L to the second cutting length L / n, and then, when there is no defective portion Pf in the double-faced corrugated cardboard sheet F, performs the second cutting. The length L / n is changed to the first cutting length L. Therefore, after the double-faced corrugated paperboard sheet F0 including the defective portion Pf is cut short and discharged, when the double-faced corrugated paperboard sheet F has no defective portion Pf, the double cut length L / n is returned to the first cut length L. Therefore, the cut-off 25 can cut the continuous double-faced corrugated cardboard sheet E to a predetermined first cutting length L to continuously form the plate-shaped double-faced corrugated cardboard sheet F.
　本実施形態のシートの不良除去装置では、表ライナＡは、表面に切断位置を表す切断用マークＭが印刷されたプレプリントライナであり、カットオフ２５より上流側に切断用マークＭを検出するマーク検出装置７５が設けられ、制御装置５５は、第２切断長Ｌ／ｎの位置に切断用マークＭがないとき、第２切断長Ｌ／ｎに予め設定された余裕長Ｌｍを加算した位置でカットオフ２５を作動する。従って、制御装置５５は、両面段ボールシートＦに不良部Ｐｆにあり、且つ、長さＬが排出許容長さＬｄより長いときに第１切断長Ｌから第２切断長Ｌ／ｎに変更するが、第２切断長Ｌ／ｎの位置に切断用マークＭがないことから、第２切断長Ｌ／ｎに余裕長Ｌｍを加算した位置で不良部Ｐｆを含む両面段ボールシートＦを切断する。そのため、不良部Ｐｆを含む両面段ボールシートＦ０は、排出許容長さＬｄより短く切断されることとなり、不良品排出装置２６により容易に排出することができる。 In the sheet defect removing apparatus of the present embodiment, the front liner A is a preprint liner on which a cutting mark M indicating a cutting position is printed on the surface, and detects the cutting mark M upstream of the cutoff 25. A mark detecting device 75 is provided, and when the cutting mark M is not present at the position of the second cutting length L / n, the control device 55 determines a position obtained by adding a preset margin length Lm to the second cutting length L / n. The cut-off 25 is activated. Therefore, the control device 55 changes the first cut length L to the second cut length L / n when the double-faced corrugated cardboard sheet F is at the defective portion Pf and the length L is longer than the discharge allowable length Ld. Since there is no cutting mark M at the position of the second cutting length L / n, the double-faced corrugated cardboard sheet F including the defective portion Pf is cut at a position obtained by adding the margin length Lm to the second cutting length L / n. Therefore, the double-faced corrugated cardboard sheet F0 including the defective portion Pf is cut shorter than the discharge allowable length Ld, and can be easily discharged by the defective product discharge device 26.
　本実施形態のシートの不良除去装置では、制御装置５５は、第１切断長Ｌに基づいてカットオフ２５の作動を制御するノーマル切断モードと、切断用マークＭに基づいてカットオフ２５の作動を制御するプレプリント切断モードとを有し、ノーマル切断モードとプレプリント切断モードとの切換時に第１切断長Ｌから第２切断長Ｌ／ｎに変更する。従って、制御装置５５は、ノーマル切断モードからプレプリント切断モードへの切換時、または、プレプリント切断モードからノーマル切断モードへの切換時に、第１切断長Ｌから第２切断長Ｌ／ｎに変更することから、モード切替時に発生する紙継ぎ部を含む両面段ボールシートＦ０を短く切断し、不良品排出装置２６により適正に排出することができる。 In the sheet defect removing apparatus of the present embodiment, the control device 55 controls the operation of the cutoff 25 based on the first cutting length L in the normal cutting mode and the operation of the cutoff 25 based on the cutting mark M. It has a preprint cutting mode to be controlled, and changes from the first cutting length L to the second cutting length L / n when switching between the normal cutting mode and the preprint cutting mode. Therefore, the control device 55 changes the first cutting length L to the second cutting length L / n when switching from the normal cutting mode to the preprint cutting mode or when switching from the preprint cutting mode to the normal cutting mode. Therefore, the double-faced corrugated cardboard sheet F0 including the paper spliced portion generated at the time of mode switching can be cut short, and can be properly discharged by the defective product discharging device 26.
　本実施形態のシートの不良除去装置では、不良部Ｐｆを紙継ぎ部、中芯変形部、印刷不良部、傷、汚れの少なくともいずれか一つであるとしている。従って、紙継ぎ部や中芯変形部や印刷不良部などの不良部Ｐｆを含む両面段ボールシートＦを適正に短く切断して排出することができる。 In the sheet defect removing apparatus of the present embodiment, the defective portion Pf is at least one of a paper spliced portion, a core deformed portion, a defective printing portion, a scratch, and a stain. Therefore, the double-faced corrugated cardboard sheet F including the defective portion Pf such as the paper spliced portion, the core deformed portion, or the defective printing portion can be cut appropriately and discharged.
　また、本実施形態の段ボールシートの不良除去方法にあっては、波形加工された中芯Ｂの両側にライナＡ，Ｃを貼り合わせて形成される両面段ボールシートＥを幅方向に沿って予め設定された所定長さＬに切断する工程と、両面段ボールシートの不良部Ｐｆを検出する工程と、板状の両面段ボールシートＦの長さＬが排出許容長さＬｄより長いときに不良部Ｐｆを含む両面段ボールシートを排出許容長さＬｄより短い長さに切断する工程と、排出許容長さＬｄより短い長さに切断された板状の両面段ボールシートＦ０を搬送ラインから排出する工程とを有する。 Further, in the method of removing defective cardboard sheets according to the present embodiment, a double-faced cardboard sheet E formed by laminating liners A and C on both sides of a corrugated core B is preset along the width direction. Cutting the defective portion Pf to a predetermined length L, detecting a defective portion Pf of the double-faced corrugated cardboard sheet, and removing the defective portion Pf when the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the discharge allowable length Ld. And a step of discharging the plate-shaped double-faced corrugated cardboard sheet F0 cut to a length shorter than the discharge allowable length Ld from the transport line. .
　従って、制御装置５５は、板状の両面段ボールシートＦの長さＬが不良品排出装置２６の排出許容長さＬｄより長いときにカットオフ２５を作動し、不良部Ｐｆを含む両面段ボールシートＥを排出許容長さＬｄより短い長さに切断する。すると、不良部Ｐｆを含む両面段ボールシートＥは、排出許容長さＬｄより短くなり、不良部Ｐｆを含む両面段ボールシートＦを不良品排出装置２６により搬送ラインから適正に排出するひとができる。その結果、両面段ボールシートＦの長さに拘わらず不良品である両面段ボールシートＦ０を適正に搬送ラインから除去して作業効率の向上を図ることができる。 Accordingly, the control device 55 activates the cutoff 25 when the length L of the plate-shaped double-faced corrugated cardboard sheet F is longer than the allowable discharge length Ld of the defective product discharge device 26, and the double-faced corrugated cardboard sheet E including the defective portion Pf. Is cut to a length shorter than the allowable discharge length Ld. Then, the double-faced corrugated cardboard sheet E including the defective portion Pf becomes shorter than the discharge allowable length Ld, and a person capable of properly discharging the double-faced corrugated cardboard sheet F including the defective portion Pf from the transport line by the defective product discharging device 26 can be obtained. As a result, regardless of the length of the double-faced corrugated paperboard sheet F, the defective double-faced corrugated paperboard sheet F0 can be properly removed from the transport line to improve the working efficiency.
　また、本実施形態の段ボールシートの製造装置にあっては、波形加工された中芯Ｂに裏ライナＣを貼り合わせて片面段ボールシートＤを製造するシングルフェーサ１３，１７と、シングルフェーサ１３，１７で製造される片面段ボールシートＤにおける中芯Ｂ側に表ライナＡを貼り合わせて両面段ボールシートＥを製造するダブルフェーサ２２と、シートの不良除去装置５０とを備える。 In addition, in the corrugated cardboard sheet manufacturing apparatus of the present embodiment, the single facers 13 and 17 for manufacturing the single-sided corrugated cardboard sheet D by bonding the back liner C to the corrugated core B and the single facer 13 , 17 are provided with a double facer 22 for bonding the front liner A to the core B side of the single-faced cardboard sheet D to produce a double-faced cardboard sheet E, and a sheet defect removing device 50.
　従って、シングルフェーサ１３，１７は、波形加工された中芯Ｂに裏ライナＣを貼り合わせて片面段ボールシートＤを製造し、ダブルフェーサ２２は、シングルフェーサ１３，１７で製造される片面段ボールシートＤにおける中芯Ｂ側に表ライナＡを貼り合わせて両面段ボールシートＥを製造し、カットオフ２５は、両面段ボールシートＥを幅方向に沿って所定長さに切断する。このとき、制御装置５５は、不良品排出装置２６により不良部Ｐｆを含む両面段ボールシートＦを搬送ラインから排出するが、板状の両面段ボールシートＦの長さＬが不良品排出装置２６の排出許容長さＬｄより長いときにカットオフ２５を作動し、不良部Ｐｆを含む両面段ボールシートＥを排出許容長さＬｄより短い長さに切断する。すると、不良部Ｐｆを含む両面段ボールシートＦ０は、排出許容長さＬｄより短くなり、不良部Ｐｆを含む両面段ボールシートＦ０を不良品排出装置２６により搬送ラインから適正に排出することができる。その結果、両面段ボールシートＦの長さに拘わらず不良品である両面段ボールシートＦ０を適正に搬送ラインから除去して作業効率の向上を図ることができる。 Accordingly, the single facers 13 and 17 produce the single-faced corrugated cardboard sheet D by laminating the back liner C to the corrugated core B, and the double facer 22 constitutes the single-faced corrugated cardboard sheet produced by the single facers 13 and 17. The front liner A is attached to the core B side of D to produce a double-faced cardboard sheet E, and the cutoff 25 cuts the double-faced cardboard sheet E into a predetermined length along the width direction. At this time, the control device 55 discharges the double-faced corrugated cardboard sheet F including the defective portion Pf from the transport line by the defective product discharge device 26. When the length is longer than the permissible length Ld, the cutoff 25 is operated to cut the double-faced corrugated cardboard sheet E including the defective portion Pf into a length shorter than the permissible discharge length Ld. Then, the double-faced corrugated cardboard sheet F0 including the defective portion Pf becomes shorter than the discharge allowable length Ld, and the double-faced corrugated cardboard sheet F0 including the defective portion Pf can be properly discharged from the transport line by the defective product discharging device 26. As a result, regardless of the length of the double-faced corrugated paperboard sheet F, the defective double-faced corrugated paperboard sheet F0 can be properly removed from the transport line to improve the working efficiency.
　なお、上述した実施形態にて、不良品排出装置２６を第１搬送コンベア６４と、第２搬送コンベア６５と、第１排出コンベア６６と、第２排出コンベア６７と、振分ロール６８から構成したが、この構成に限定されるものではない。例えば、第２排出コンベア６７に代えて不良品収納かごなどを設けてもよい。 In the above-described embodiment, the defective product discharge device 26 includes the first transport conveyor 64, the second transport conveyor 65, the first discharge conveyor 66, the second discharge conveyor 67, and the distribution roll 68. However, the present invention is not limited to this configuration. For example, a defective storage basket or the like may be provided instead of the second discharge conveyor 67.
　また、上述した実施形態にて、切断装置をカットオフ２５としたが、この構成に限定されるものではない。例えば、カットオフ２５とは別に切断装置を設けてもよい。 Also, in the above-described embodiment, the cutting device is the cutoff 25, but is not limited to this configuration. For example, a cutting device may be provided separately from the cutoff 25.
　また、上述した実施形態にて、コルゲートマシン１０は、片面段ボールシートＤ１と片面段ボールシートＤ２と表ライナＡを貼り合せた複両面段ボールシートを製造するものとしたが、片面段ボールシートＤ２（Ｄ１）と表ライナＡを貼り合せた両面段ボールシートを製造するものとしてもよい。 In the above-described embodiment, the corrugating machine 10 manufactures a double-sided corrugated cardboard sheet by laminating the single-sided corrugated cardboard sheet D1, the single-sided corrugated cardboard sheet D2, and the front liner A. However, the single-sided corrugated cardboard sheet D2 (D1) A double-sided corrugated cardboard sheet may be manufactured by laminating the sheet liner A with the front liner A.
　また、上述した実施形態では、本発明の制御装置を制御装置５５およびカットオフ制御装置５６から構成したが、機能を兼用させることで、一つの制御装置としてもよい。 Further, in the above-described embodiment, the control device of the present invention includes the control device 55 and the cutoff control device 56. However, a single control device may be provided by sharing functions.
　１０　コルゲートマシン（段ボールシートの製造装置）
　１１，１２，１５，１６，１９　ミルロールスタンド
　１３，１７　シングルフェーサ
　１４，１８　ブリッジ
　２０　プレヒータ
　２１　グルーマシン
　２２　ダブルフェーサ
　２３　ロータリシャ
　２４　スリッタスコアラ
　２５　カットオフ（切断装置）
　２６　不良品排出装置
　２７　スタッカ
　２８　スプライサ
　５０　シートの不良除去装置
　５１（５１ａ，５１ｂ，５１ｃ，５１ｄ）　紙継ぎ部検出装置（不良検出装置）
　５２（５２ａ，５２ｂ）　片段不良検出装置（不良検出装置）
　５３（５３ａ，５３ｂ）　品質検査装置（不良検出装置）
　５４（５４ａ，５４ｂ）　不良検出スイッチ（不良検出装置）
　５５　制御装置
　６１　搬送コンベア
　６２，６３　切断ロール
　６４　第１搬送コンベア
　６５　第２搬送コンベア
　６６　第１排出コンベア
　６７　第２排出コンベア
　６８　振分ロール
　７５　マーク検出装置
　７７　マークセンサ
　Ａ　表ライナ（第１ライナ）
　Ｂ１，Ｂ２　中芯
　Ｃ１，Ｃ２　裏ライナ（第２ライナ）
　Ｄ１，Ｄ２　片面段ボールシート
　Ｅ，Ｅ１　連続する両面段ボールシート
　Ｅ，Ｅ２　連続する複両面段ボールシート
　Ｆ，Ｆ１　板状の両面段ボールシート
　Ｆ，Ｆ２　板状の複両面段ボールシート
　Ｆ０　不良部を含む板状の両面段ボールシート
　Ｌ　第１切断長
　Ｌ／ｎ（Ｌ／２）　第２切断長
　Ｌｍ　余裕長
　Ｌｄ　排出許容長さ
　Ｐｆ　不良部 10 Corrugating 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 corer 25 Cut-off (cutting device)
26 defective product discharge device 27 stacker 28 splicer 50 sheet defect removing device 51 (51a, 51b, 51c, 51d) paper splicing portion detecting device (defective detecting device)
52 (52a, 52b) Single-stage failure detection device (failure detection device)
53 (53a, 53b) Quality inspection device (defective detection device)
54 (54a, 54b) failure detection switch (failure detection device)
55 control device 61 transport conveyor 62, 63 cutting roll 64 first transport conveyor 65 second transport conveyor 66 first discharge conveyor 67 second discharge conveyor 68 distribution roll 75 mark detection device 77 mark sensor A front liner (first liner)
B1, B2 Core C1, C2 Back liner (second liner)
D1, D2 Single-sided cardboard sheet E, E1 Continuous double-sided cardboard sheet E, E2 Continuous double-sided cardboard sheet F, F1 Plate-shaped double-sided cardboard sheet F, F2 Plate-shaped double-sided corrugated cardboard sheet F0 Double-sided corrugated cardboard L First cut length L / n (L / 2) Second cut length Lm Margin length Ld Allowable discharge length Pf Defective part

Claims (10)

  1. 　第１ライナと波形加工された中芯と第２ライナが貼り合わされて形成された所定長さを有する板状の段ボールシートの不良品を除去するシートの不良除去装置において、
    　段ボールシートを幅方向に沿って切断する切断装置と、
    　段ボールシートの不良部を検出する不良検出装置と、
    　前記不良部を含む板状の段ボールシートを搬送ラインから排出する不良品排出装置と、
    　前記不良検出装置の検出結果に応じて前記不良品排出装置を作動すると共に板状の段ボールシートの長さが前記不良品排出装置の排出許容長さより長いときに前記不良部を含む段ボールシートを前記排出許容長さより短い長さに切断するように前記切断装置を制御する制御装置と、
    　を備えることを特徴とするシートの不良除去装置。     In a sheet defect removing device for removing a defective corrugated cardboard sheet having a predetermined length formed by laminating a first liner, a corrugated core, and a second liner,
    A cutting device for cutting the cardboard sheet along the width direction,
    A defect detection device for detecting a defective portion of the cardboard sheet;
    A defective product discharging device that discharges a plate-like corrugated cardboard sheet including the defective portion from a transport line,
    Activating the defective product discharging device according to the detection result of the defective detection device and, when the length of the plate-shaped corrugated cardboard sheet is longer than the allowable discharge length of the defective product discharging device, removing the corrugated cardboard sheet including the defective portion. A control device for controlling the cutting device so as to cut to a length shorter than the discharge allowable length,
    A defect removing device for a sheet, comprising:
  2. 　前記制御装置は、板状の段ボールシートの長さが前記排出許容長さより長いとき、前記不良部を含む段ボールシートを前記所定長さ以上の長さ範囲にわたって前記排出許容長さより短い長さに切断するように前記切断装置を制御することを特徴とする請求項１に記載のシートの不良除去装置。 When the length of the plate-shaped corrugated cardboard sheet is longer than the discharge allowable length, the control device cuts the corrugated cardboard sheet including the defective portion into a length shorter than the discharge allowable length over a length range equal to or longer than the predetermined length. The sheet defect removing apparatus according to claim 1, wherein the cutting apparatus is controlled to perform the cutting operation.
  3. 　前記切断装置は、連続する段ボールシートを幅方向に沿って予め設定された所定の第１切断長に切断することで板状の段ボールシートを形成するものであり、前記制御装置は、板状の段ボールシートの長さが前記排出許容長さより長いとき、前記不良部を含む段ボールシートの切断長を前記第１切断長の整数分の１である第２切断長に変更することを特徴とする請求項１または請求項２に記載のシートの不良除去装置。 The cutting device forms a plate-shaped corrugated cardboard sheet by cutting a continuous corrugated cardboard sheet to a predetermined first cutting length set in advance in the width direction, and the control device includes a plate-shaped corrugated cardboard sheet. When the length of the corrugated cardboard sheet is longer than the discharge allowable length, the cut length of the corrugated cardboard sheet including the defective portion is changed to a second cut length that is an integer fraction of the first cut length. The sheet removing apparatus according to claim 1 or 2.
  4. 　前記制御装置は、前記不良部を含む段ボールシートを前記第２切断長で前記整数分だけ切断した後、前記第２切断長から前記第１切断長に変更することを特徴とする請求項３に記載のシートの不良除去装置。 The method according to claim 3, wherein the control device changes the second cut length to the first cut length after cutting the corrugated cardboard sheet including the defective portion by the second cut length by the integer. The sheet removing device described in the above.
  5. 　前記制御装置は、前記第１切断長から前記第２切断長に変更した後、段ボールシートに前記不良部がないときは、前記第２切断長から第１切断長に変更することを特徴とする請求項３に記載のシートの不良除去装置。 After changing the first cut length to the second cut length, the control device changes the second cut length to the first cut length when the cardboard sheet does not have the defective portion. The sheet defect removing device according to claim 3.
  6. 　第１ライナは、表面に切断位置を表す切断用マークが印刷され、前記切断装置より段ボールシートの搬送方向の上流側に前記切断用マークを検出するマーク検出装置が設けられ、前記制御装置は、前記第２切断長の位置に前記切断用マークがないとき、前記第２切断長に予め設定された余裕長を加算した位置で前記切断装置の作動を制御することを特徴とする請求項３から請求項５のいずれか一項に記載のシートの不良除去装置。 The first liner is provided with a cutting mark indicating a cutting position on a surface thereof, and a mark detecting device that detects the cutting mark is provided upstream of the cutting device in the conveying direction of the corrugated cardboard sheet. The control device includes: The method according to claim 3, wherein when the cutting mark is not present at the position of the second cutting length, the operation of the cutting device is controlled at a position obtained by adding a preset margin length to the second cutting length. The sheet defect removing device according to claim 5.
  7. 　前記制御装置は、第１切断長に基づいて前記切断装置の作動を制御するノーマル切断モードと、前記切断用マークに基づいて前記切断装置の作動を制御する作動するプレプリント切断モードとを有し、前記ノーマル切断モードと前記プレプリント切断モードとの切換時に前記第１切断長から前記第２切断長に変更することを特徴とする請求項６に記載のシートの不良除去装置。 The control device has a normal cutting mode that controls the operation of the cutting device based on a first cutting length, and a preprint cutting mode that operates to control the operation of the cutting device based on the cutting mark. The apparatus according to claim 6, wherein the first cutting length is changed to the second cutting length when switching between the normal cutting mode and the preprint cutting mode.
  8. 　前記不良部は、紙継ぎ部、中芯変形部、印刷不良部、傷、汚れ、糊かす付着の少なくともいずれか一つであることを特徴とする請求項１から請求項７のいずれか一項に記載のシートの不良除去装置。 8. The method according to claim 1, wherein the defective portion is at least one of a paper spliced portion, a core deformed portion, a defective print portion, a flaw, a stain, and an adhesive residue. 9. 3. The sheet defect removing device according to claim 1.
  9. 　波形加工された中芯の両側にライナを貼り合わせて形成される段ボールシートを幅方向に沿って予め設定された所定長さに切断する工程と、
    　段ボールシートの不良部を検出する工程と、
    　板状の段ボールシートの長さが排出許容長さより長いときに前記不良部を含む段ボールシートを前記排出許容長さより短い長さに切断する工程と、
    　前記排出許容長さより短い長さに切断された板状の段ボールシートを搬送ラインから排出する工程と、
    　を有することを特徴とするシートの不良除去方法。     A step of cutting a corrugated cardboard sheet formed by laminating a liner on both sides of the corrugated core to a predetermined length set in advance in the width direction,
    A step of detecting a defective portion of the cardboard sheet;
    A step of cutting the cardboard sheet including the defective portion into a length shorter than the discharge allowable length when the length of the plate-like corrugated cardboard sheet is longer than the discharge allowable length,
    Discharging a plate-shaped corrugated cardboard sheet cut to a length shorter than the discharge allowable length from a transport line,
    A method for removing a defective sheet, comprising:
  10. 　波形加工された中芯に第２ライナを貼り合わせて片面段ボールシートを製造するシングルフェーサと、
    　前記片面段ボールシートにおける中芯側に第１ライナを貼り合わせて段ボールシートを製造するダブルフェーサと、
    　請求項１から請求項８のいずれか一項に記載のシートの不良除去装置と、
    　を備えることを特徴とする段ボールシートの製造装置。     A single facer for manufacturing a single-sided cardboard sheet by laminating a second liner to the corrugated core;
    A double facer for manufacturing a corrugated cardboard sheet by laminating a first liner to a center side of the single-sided corrugated cardboard sheet;
    A sheet defect removing device according to any one of claims 1 to 8,
    An apparatus for manufacturing a corrugated cardboard sheet, comprising:
PCT/JP2019/027806 2018-08-29 2019-07-12 Apparatus and method for eliminating defect from sheet, and corrugated cardboard sheet manufacturing apparatus WO2020044820A1 (en)

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