Cardboard sheet-cutting device with a movable mark detector

Patent metadata

Field	Value
Publication number	US-10618190-B2
Application number	US-201615742838-A
Country	US
Kind code	B2
Filing date	Feb 24, 2016
Priority date	Aug 10, 2015
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

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.

First claim

The invention claimed is:

1. A cardboard sheet-cutting device comprising:
an ink jet printer configured to print a cutting mark on a cardboard sheet under transport;
a slitter scorer configured to cut the cardboard sheet under transport to a predetermined width in a longitudinal direction;
a cutoff configured to cut the cardboard sheet under transport in a width-direction and produce the cardboard sheet with a predetermined length;
a mark detector configured to detect the cutting mark in the cardboard sheet under transport; and
a controller configured to control the cutting of the slitter scorer and the cutoff and change a control setting value of the mark detector on a basis of a change in printing image information, wherein
the printing image information is a cutting width of the cardboard sheet to be cut by the slitter scorer according to the change in the printing image, and
the control setting value is a detection position where the mark detector is capable to detect the cutting mark after the change, and
the controller is configured to change the control setting value of the mark detector on the basis of the changed printing image information, while the cardboard sheet is transported.

2. 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 slitter scorer during the transport of the cardboard sheet.

3. The cardboard sheet-cutting device according to claim 2 ,
wherein the job-change timing data includes data of a target printed sheet number in a predetermined job,
the controller is configured to cause the ink jet printer to switch from printing the cutting mark of a job under execution to printing the cutting mark of the next job when an actual printed sheet number of the cutting mark of the job under execution reaches the target printed sheet numbed.

4. The cardboard sheet-cutting device according to claim 2 ,
wherein the mark position information is printing position data of the cutting mark in the longitudinal direction of the cardboard sheet.

5. The cardboard sheet-cutting device according to claim 1 ,
wherein, when printing image information of a first job is changed to printing image information of a 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 position where the mark detector is configured to detect a cutting mark of the first job to a position where the mark detector is configured to detect a cutting mark of the second job, and
when the first job changes to the second job, the controller is configured to cause the ink jet printer to control a printing timing of the print the cutting mark in accordance with the idle running length.

6. The cardboard sheet-cutting device according to claim 1 ,
wherein job data includes 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, and
the controller is configured to control the ink jet printer, the slitter scorer, and the cutoff on a basis of the job data.

7. The cardboard sheet-cutting device according to claim 6 ,
wherein a cutting upper limit length is a length that adds a margin length to the 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 and the cutting mark exceeds the cutting upper limit length, the controller is configured to operate the cutoff.

8. The cardboard sheet-cutting device according to claim 6 ,
wherein the printing image information is the printing color of the cutting mark, and the controller is configured to correct a detection result of the mark detector on the basis of the printing color.

9. The cardboard sheet-cutting device according to claim 1 ,
wherein the controller is configured to calculate a deviation between a target cutting length and an actual cutting length of the cardboard sheet.

10. The cardboard sheet-cutting device according to claim 9 ,
wherein the controller is configured to correct printing data of the cutting mark using the ink jet printer when the deviation exceeds a preset allowable value.

11. The cardboard sheet-cutting device according to claim 1 ,
wherein the ink jet printer is configured to print a pattern on the cardboard sheet under transport, and at least a portion of the pattern is used as the cutting mark.

12. A cutting controller for a cardboard sheet in a cardboard sheet-cutting device, the cardboard sheet-cutting device comprising:
an ink jet printer configured to print a cutting mark on a cardboard sheet under transport;
a slitter scorer configured to cut the cardboard sheet under transport to a predetermined width in a longitudinal direction;
a mark detector configured to detect the cutting mark in the cardboard sheet under transport; and
a cutoff configured to cut the cardboard sheet under transport in a width-direction and produce the cardboard sheet with a predetermined length,
wherein the controller is configured to:
change a control setting value of the mark detector based on a change in printing image information, the printing image information comprises a cutting width of the cardboard sheet to be cut by the slitter scorer according to the change in the printing image information, the control setting value comprises a detection position where the mark detector is configured to detect the cutting mark after the change; and
change the control setting value of the mark detector based on the changed printing image information, while the cardboard sheet is transported.

13. A cardboard sheet-manufacturing apparatus comprising:
a single facer configured to bond a second liner to a core paper subjected to waveform processing to manufacture a single-faced cardboard sheet;
a double facer configured to bond 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 .

Assignees

• Mitsubishi Heavy Ind Mach Systems Ltd

Inventors

• Senoo Shinichiro

Classifications

• B41J11/70

  cutting perpendicular to the direction of paper feed · CPC title

• B26D5/007

  Control means comprising cameras, vision or image processing systems · CPC title

• B31F7/00

  Processes not otherwise provided for · CPC title

• B41J11/663

  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 title

• B26D11/00 Primary

  Combinations of several similar cutting apparatus · CPC title