CARDBOARD SHEET-CUTTING DEVICE, CUTTING CONTROL UNIT THEREFOR, AND CARDBOARD SHEET-MANUFACTURING APPARATUS

• US 20180200906A1
• Filed: 02/24/2016
• Published: 07/19/2018
• Est. Priority Date: 08/10/2015
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries Machinery Systems, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries Machinery Systems, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Inventors: SENOO, Shinichiro
• Granted Patent: US 10,618,190 B2
• Time in Patent Office: Days
• CPC Class Codes: B26D 11/00 Combinations of several similar cutting apparatus
• CPC Class Codes: B26D 2011/005 in combination with different kind of cutters, e.g. two serial slitters in combination with a transversal cutter
• CPC Class Codes: B26D 5/007 Control means comprising cameras, vision or image processing systems
• CPC Class Codes: B26D 5/34 scanning being effected by a photosensitive device
• CPC Class Codes: B26D 9/00 Cutting apparatus combined with punching or perforating apparatus or with dissimilar cutting apparatus
• CPC Class Codes: B31F 7/00 Processes not otherwise provided for
• CPC Class Codes: B32B 2317/12 Paper, e.g. cardboard
• CPC Class Codes: B41J 11/0095 Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end
• CPC Class Codes: B41J 11/663 Controlling cutting, cutting resulting in special shapes of the cutting line, e.g. controlling cutting positions, e.g. for cutting in the immediate vicinity of a printed image
• CPC Class Codes: B41J 11/68 cutting parallel to the direction of paper feed
• CPC Class Codes: B41J 11/70 cutting perpendicular to the direction of paper feed
• CPC Class Codes: B65H 2553/81 on a movable element
• CPC Class Codes: B65H 2553/83 selectively positionable in operative state
• CPC Class Codes: B65H 2701/1762 Corrugated
• CPC Class Codes: G05B 2219/37336 Cutting, machining time

Abstract

Regarding a cardboard sheet-cutting device, a cardboard sheet-cutting control unit and a cardboard sheet-manufacturing apparatus, continuous cutting is made during job changes, in which the cardboard sheet cutting width changes, without stopping conveyance of the cardboard sheets, by a printing unit for printing cutting marks on a double-faced cardboard sheet; a slitter scorer for cutting the double-faced cardboard sheet to a specified width; a cutoff for cutting the double-faced cardboard sheet to a specified length; a mark detector for detecting cutting marks; a movement unit for moving the mark detector along the width direction of the double-faced cardboard sheet; and a cutting control unit for performing control to actuate the cutoff on the basis of the detection results of the mark detector and moving the mark detector using the movement unit on the basis of job-change timing data and post-job change mark position information.

Claims

1. A cardboard sheet-cutting device comprising:

a digital printing machine that prints a cutting mark on a cardboard sheet under transport;

a first cutting machine that cuts the cardboard sheet under transport to a predetermined width in a longitudinal direction;

a second cutting machine that cuts the cardboard sheet under transport to a predetermined length in a width direction;

a mark detector that detects the cutting mark in the cardboard sheet under transport; and

a control unit that controls operation of the first cutting machine and the second cutting machine and changes a control setting value of the mark detector on the basis of a change in printing image information.

2. The cardboard sheet-cutting device according to claim 1,

wherein the printing image information is information for changing a printing image printed on the cardboard sheet, and the control unit changes a control setting value of the mark detector on the basis of the changed printing image.

3. The cardboard sheet-cutting device according to claim 2,

wherein a movement unit that moves the mark detector in the width direction of the cardboard sheet is provided, the printing image information is a cutting width, of the cardboard sheet to be cut by the first cutting machine, changed with a change in the printing image, the control setting value is a detected position detected by the mark detector, and the control unit moves the mark detector to a detected position after a change using the movement unit on the basis of the changed cutting width of the cardboard sheet.

4. The cardboard sheet-cutting device according to claim 1,

wherein the printing image information is job change information for changing the cutting width of the cardboard sheet to be cut by the first cutting machine during the transport of the cardboard sheet, and when there is a job change, the control unit moves the mark detector using the movement unit on the basis of job-change timing data and mark position information after the job change.

5. The cardboard sheet-cutting device according to claim 4,

wherein the job-change timing data has data of a target printed sheet number in a predetermined job, the control unit switches from printing of the cutting mark corresponding to a job under execution by the digital printing machine to printing of the cutting mark corresponding to the next job if an actual printed sheet number of the cutting mark corresponding to the job under execution reaches the target printed sheet number, and moves the mark detector using the movement unit if the switching position of the cutting mark reaches the second cutting machine.

6. The cardboard sheet-cutting device according to claim 4,

wherein the mark position information is printing position data of the cutting mark in the longitudinal direction of the cardboard sheet, and when there is a job change, the control unit moves the mark detector to a cutting mark detectable position after the job change using the movement unit.

7. The cardboard sheet-cutting device according to claim 1,

wherein, when printing image information of the first job is changed to printing image information of the second job, an idle running length of the cardboard sheet is set in correspondence with a period for which the mark detector moves from a detectable position in the first job to a detectable position in the second job, and when there is a job change, the control unit controls a printing timing of the digital printing machine in accordance with the idle running length.

8. The cardboard sheet-cutting device according to claim 1,

wherein an image of the cutting mark, a printing position of the cutting mark, a printing color of the cutting mark, a cutting width and a cutting length of the cardboard sheet, and a manufactured sheet number of the cardboard sheet are set as job data, and the control unit controls the digital printing machine, the first cutting machine, the second cutting machine, and the movement unit on the basis of the job data.

9. The cardboard sheet-cutting device according to claim 8,

wherein a cutting upper limit length obtained by adding a margin length to a cutting length of the cardboard sheet is set, and when the mark detector does not detect the cutting mark beyond the cutting upper limit length, the control unit operates the second cutting machine when the cutting mark exceeds the cutting upper limit length.

10. The cardboard sheet-cutting device according to claim 8,

wherein the printing image information is a printing color of the cutting mark, and the control unit corrects a detection result of the mark detector on the basis of the printing color of the cutting mark.

11. The cardboard sheet-cutting device according to claim 1,

wherein the control unit calculates a deviation between a target cutting length and an actual cutting length of the cardboard sheet.

12. The cardboard sheet-cutting device according to claim 11,

wherein the control unit corrects printing data of the cutting mark using the digital printing machine when the deviation between the target cutting length and the actual cutting length exceeds a preset allowable value.

13. The cardboard sheet-cutting device according to claim 1,

wherein the digital printing machine is capable of printing a pattern on the cardboard sheet under transport, and uses at least a portion of the pattern as the cutting mark.

15. A cardboard sheet-manufacturing apparatus comprising:

a single facer that bonds a second liner to a core paper subjected to waveform processing to manufacture a single-faced cardboard sheet;

a double facer that bonds a first liner to a core paper side in the single-faced cardboard sheet to manufacture a double-faced cardboard sheet; and

the cardboard sheet-cutting device according to claim 1.

14. A cutting control unit for a cardboard sheet in a cardboard sheet-cutting device including:

a digital printing machine that prints a cutting mark on a cardboard sheet under transport;

a first cutting machine that cuts the cardboard sheet under transport to a predetermined width in a longitudinal direction;

a mark detector that detects the cutting mark in the cardboard sheet under transport; and

a second cutting machine that cuts the cardboard sheet under transport to a predetermined length in a width direction on the basis of a detection result of the mark detector,

wherein a control setting value of the mark detector is changed on the basis of a change in printing image information.