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EP-4406889-B1 - DEVICE AND METHOD FOR PROCESSING BASE PAPER ROLL, AND DEVICE FOR PRODUCING CARDBOARD SHEET

EP4406889B1EP 4406889 B1EP4406889 B1EP 4406889B1EP-4406889-B1

Inventors

  • NAGAO, TAKAHIRO
  • MIZUTANI, HIDEKI
  • KAWASHIMA, TSUNEHIRO

Dates

Publication Date
20260506
Application Date
20230925

Claims (8)

  1. A device for processing a base paper roll (100), the device comprising: a winding device (106) that winds corrugated cardboard base paper drawn out by rotating a base paper roll (Ra, Rb); a paper leading edge detection unit (102) that detects a leading edge of the corrugated cardboard base paper wound by the winding device (106); a taping device (108A, 108B) that fixes the leading edge of the wound corrugated cardboard base paper to an outer peripheral face of the base paper roll (Ra, Rb) with adhesive tape; and characterized by further comprising a control unit (112) that controls a rotation speed of the base paper roll (Ra, Rb) based on an arrival direction of the leading edge of the corrugated cardboard base paper with respect to the taping device (107) on the outer peripheral face of the base paper roll (Ra, Rb) when the paper leading edge detection unit (102) detects the leading edge of the corrugated cardboard base paper, and activates the taping device (107) after controlling the rotation speed of the base paper roll (Ra, Rb).
  2. The device for processing a base paper roll (100) according to claim 1, further comprising: an outer diameter acquisition unit (103) that acquires outer diameter information of the base paper roll (Ra, Rb); a rotation amount acquisition unit (104) that acquires a rotation amount of the base paper roll (Ra, Rb) ; and a computation unit (111) that calculates an activation starting time of the taping device (107) based on a detection result of the paper leading edge detection unit (102), an acquisition result of the outer diameter acquisition unit, and an acquisition result of the rotation amount acquisition unit, wherein the control unit (112) activates the taping device (107) at the activation starting time.
  3. The device for processing a base paper roll (100) according to claim 2, wherein the computation unit calculates a speed reduction starting time, at which the rotation speed of the base paper roll (Ra, Rb) is reduced, before the activation starting time, and the control unit (112) reduces rotation of the base paper roll (Ra, Rb) at the speed reduction starting time.
  4. The device for processing a base paper roll (100) according to any one of claims 1 to 3, wherein the winding device (106) has a support member (72A, 72B) for supporting the corrugated cardboard base paper on one side in a horizontal direction above a support position of the base paper roll (Ra, Rb) in a vertical direction and a hold member (141A, 141B) for holding the corrugated cardboard base paper between the hold member and the support member (72A, 72B), and the paper leading edge detection unit (102) detects the leading edge of the corrugated cardboard base paper between the support position of the base paper roll (Ra, Rb) and the support member (72A, 72B).
  5. The device for processing a base paper roll (100) according to any one of claims 1 to 4, wherein a first path (P1) is set in which the leading edge of the corrugated cardboard base paper reaches the taping device (107) from above in a vertical direction and is wound to the base paper roll (Ra, Rb) on the outer peripheral face of the base paper roll (Ra, Rb), and the control unit (112) reduces the rotation speed of the base paper roll (Ra, Rb) by the winding device (106) when the paper leading edge detection unit (102) detects the leading edge of the corrugated cardboard base paper.
  6. The device for processing a base paper roll (Ra, Rb) according to any one of claims 1 to 4, wherein a second path (P2) is set in which the leading edge of the corrugated cardboard base paper reaches the taping device (107) from below in a vertical direction and is wound to the base paper roll (Ra, Rb) on the outer peripheral face of the base paper roll (Ra, Rb), and the control unit (112) raises the rotation speed of the base paper roll (Ra, Rb) by the winding device (106) when the paper leading edge detection unit (102) detects the leading edge of the corrugated cardboard base paper.
  7. A method for processing a base paper roll (100), the method comprising the steps of: winding corrugated cardboard base paper drawn out by rotating a base paper roll (Ra, Rb); detecting a leading edge of the corrugated cardboard base paper to be wound; and characterized by further comprising controlling a rotation speed of the base paper roll (Ra, Rb) based on an arrival direction of the leading edge of the corrugated cardboard base paper with respect to a taping device (107) on an outer peripheral face of the base paper roll (Ra, Rb); and activating the taping device (107) after controlling the rotation speed of the base paper roll (Ra, Rb) to fix the leading edge of the wound corrugated cardboard base paper to the outer peripheral face of the base paper roll (Ra, Rb) with adhesive tape (T).
  8. A device for manufacturing a corrugated cardboard sheet, the device comprising: mill roll stands that each rotatably support a bottom liner (A), a medium (B1 B2), and a top liner (C1, C2); a single facer (13, 17) that laminates the top liner on the corrugated medium to manufacture a single-faced web (D1, D2); a double facer (22) that laminates the bottom liner (A) on the medium (B1, B2) of the single-faced web (D1, D2) to manufacture a corrugated cardboard sheet; and the device for processing a base paper roll (100) according to any one of claims 1 to 5.

Description

Field The present disclosure relates to a device and a method for processing a base paper roll in which corrugated cardboard base paper is wound and a device for manufacturing a corrugated cardboard sheet including the device for processing a base paper roll. Background A corrugating machine as a device for manufacturing a corrugated cardboard sheet includes a single facer and a double facer. The single facer corrugates a medium and laminates a top liner thereon to form a single-faced web. The double facer laminates a bottom liner on the single-faced web to form a single-wall corrugated cardboard sheet. The single-wall corrugated cardboard sheet manufactured by the double facer to be continuous is cut to a certain width by a slitter scorer and cut to a certain length by a cutoff device to manufacture a corrugated cardboard sheet. The bottom liner, the medium, and the top liner are each corrugated cardboard base paper supplied from a base paper roll. The corrugated cardboard base paper is a web, which is wound into roll form to be a base paper roll. A mill roll stand holds a plurality of base paper rolls and rotates forward one base paper roll to supply the corrugated cardboard base paper. When the corrugated cardboard base paper in the base paper roll runs short, the mill roll stand splices corrugated cardboard based paper of a standby base paper roll to the corrugated cardboard base paper being supplied, thereby enabling continuous supply of the corrugated cardboard base paper. After paper splicing of the corrugated cardboard base paper, the cut, used base paper roll rotates backward to wind the corrugated cardboard base paper that has been drawn out, and its leading edge is fixed to the outer peripheral face of the base paper roll with adhesive tape. Such a device for processing a base paper roll is, for example, described in Patent Literature 1. Citation List Patent Literature Patent Literature 1: Japanese Patent No. 2971264 Summary Technical Problem In the technology described in Patent Literature 1, the diameter of the base paper roll is calculated, a winding amount is calculated from the diameter of the base paper roll and the number of revolutions of a rolling center, and the winding speed of the corrugated cardboard base paper is controlled in accordance with the winding amount. A microswitch then detects the leading edge of the corrugated cardboard base paper and activates a taping device. The rolling center inserts a pair of chucks into both sides of a medium tube in the axial direction to support the base paper roll. When the paper splicing operation of the corrugated cardboard base paper is performed, it is necessary to stop the rotation of the corrugated cardboard base paper being supplied via the chucks, and slippage occurs between the chucks and the medium tube, causing a gap between the rotation position (the number of revolutions) of the rolling center and the rotation position (the number of revolutions) of the base paper roll. In addition, the corrugated cardboard base paper drawn out of the base paper roll being supplied remains longer than its original length inside the machine, causing sagging and wrinkling inside the machine. In addition, an error occurs between the winding amount of the base paper roll calculated based on a detection result of a detection device and an actual winding amount. To properly detect the leading edge of the corrugated cardboard base paper, speed control near the leading edge is performed, but due to the error, an actual edge does not reach a detection unit, resulting in reduced detection accuracy, and there is a possibility that the tape cannot be properly affixed. The present disclosure is to solve the problem described above, and an object thereof is to provide a device and a method for processing a base paper roll that can properly wind and precisely fix corrugated cardboard base paper that has been drawn out of a base paper roll and a device for manufacturing a corrugated cardboard sheet. The present invention is defined by the appended independent claims. The dependent claims describe optional features and distinct embodiments. Solution to Problem In order to achieve the above object, a device for processing a base paper roll according to the present disclosure includes: a winding device that winds corrugated cardboard base paper drawn out by rotating a base paper roll; a paper leading edge detection unit that detects a leading edge of the corrugated cardboard base paper wound by the winding device; a taping device that fixes the leading edge of the wound corrugated cardboard base paper to an outer peripheral face of the base paper roll with adhesive tape; and a control unit that controls a rotation speed of the base paper roll based on an arrival direction of the leading edge of the corrugated cardboard base paper with respect to the taping device on the outer peripheral face of the base paper roll when the paper leading edge detection unit detects th