JP3654951B2 - Defect instruction mark printing apparatus and defect instruction mark detection apparatus - Google Patents

Description

[0001]
[Industrial application fields]
The present invention marks the position of a defective portion of a web that is wound up after a manufacturing process and becomes a winding body in a web manufacturing and processing apparatus such as an offset printing machine, a gravure printing machine, a coating apparatus, a papermaking machine, and a plastic sheet manufacturing apparatus. And a method and an apparatus for detecting a mark and outputting defect information on the web of the wound body at the indicated position.
[0002]
[Prior art]
In web manufacturing and processing equipment such as offset printing presses, gravure printing presses, coating equipment, papermaking machines, plastic sheet manufacturing equipment, etc., product quality check and adjustment of manufacturing conditions, called production condition determination, are performed at the initial stage of manufacturing. Repeatedly. When the production conditions are determined, good products (called regular paper) are produced from the production conditions. Usually, in these production and processing devices, the web after production and processing is wound around a core such as a paper tube. Since it is a body, it cannot be determined from the appearance where it is a good product. Further, even when there is a defect such as a seam in the web of raw materials or when a defect occurs during the manufacturing process, it is impossible to determine which part of the wound body is defective from the appearance alone.
Therefore, the operator of the manufacturing and processing machine attaches a label to the start position of the normal paper or the end of the web of the defective part when a defect occurs, inserts a piece of paper or tape, and the label, piece of paper or A part of the tape is exposed and used as a mark for removing a defective part in a later process.
[0003]
[Problems to be solved by the invention]
However, it is common for operators of manufacturing and processing equipment to manually attach tapes etc. to the web. However, the work load is not a small burden, and the manufacturing and processing equipment in operation is approached. Doing the work is very dangerous.
In addition, attachment by a machine is low in reliability, and insertion of a tape or the like may cause a wrinkle on the web in the case of a thin film material or the like, and the defect may increase due to the web being cut or the like.
Moreover, even if the position of the defect can be indicated only with the tape, it is difficult to indicate the content of the defect. Although there is a method using multiple types of tapes, details of the defective contents could not be shown.
Also, the attached tape or the like may fall off before the defective sampling operation, or the exposed mark portion may be cut out and missed by the defective sampling operation, and mixed into the final product.
Further, it is difficult to automatically detect the attached tape and stop the web transfer because the tape is attached in various postures.
[0004]
Therefore, the object of the present invention is to prevent the occurrence of secondary defects such as wrinkles on the web, which is a safe operation, accurately indicates the position and content of the defect to the defect sampling process, and is used for the printed pattern or background pattern of the web. An object of the present invention is to provide an apparatus that enables printing and detection of a mark that can be read without being affected.
[0005]
[Means for Solving the Problems]
The above object is achieved by the present invention described below. That is, the present invention is a mark that generates a mark that corresponds to the input defect information and that is printed on a margin portion between the surfaces of the web in which the printed pattern is multi-faced in the width direction. A defect indication mark printing apparatus comprising: a generation unit; and a mark printing unit that prints the mark on a margin portion of the web.
[0006]
Further, the present invention is the defect indicating mark printing apparatus, wherein the mark is an arrow mark that is printed at a defect start position and / or an end position on the web and points in the direction in which the defect exists.
Further, the present invention is the defect indicating mark printing apparatus, wherein the mark is a mark having a process attribute for determining a defect generation process and / or a defect attribute for determining a defect type.
[0007]
The present invention also provides mark detection means for detecting a mark printed in a margin portion between the surfaces of a web on which a printed pattern is multi-faced in the width direction and generating a mark signal, and defect information from the mark signal. Is a defect indication mark detection device having calculation means for reproducing the image data and output means for generating output data for performing defect processing based on the defect information.
[0008]
[Action]
According to the defect instruction mark printing apparatus of the present invention, a mark corresponding to the defect information input by the mark generation unit, and between the surfaces of the web in which the printed pattern is multifaceted in the width direction. A mark to be printed in the margin portion is generated, and the mark is printed on the margin portion of the web by the mark printing unit. Therefore, a defective information recording portion can be provided for each surface, and the position of the surface loss is indicated by the mark.
[0009]
According to the defect instruction mark printing apparatus of the present invention, the mark is an arrow mark that is printed at the defect start position and / or end position on the web and points in the direction in which the defect exists. With this arrow mark, the location of the defect is clearly indicated.
[0010]
Further, according to the defect instruction mark printing apparatus of the present invention, the mark is a mark having a process attribute for determining a defect generation process and / or a defect attribute for determining a defect type. Therefore, the defect occurrence process and / or defect type can be known from the mark.
[0011]
Further, according to the defect indication mark detection apparatus of the present invention, the mark detection means detects a mark printed in a margin portion between the surfaces of the web on which the printed pattern is multi-faced in the width direction, and generates a mark signal. Then, the defect information is reproduced from the mark signal by the calculation means, and output data for performing defect processing based on the defect information is generated by the output means. Therefore, defect information is reproduced for each surface, and defect processing can be performed for each surface.
[0012]
【Example】
Next, the present invention will be described based on a preferred embodiment. FIG. 1 is a diagram schematically showing the configuration of a defect instruction mark printing apparatus and peripheral apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes an arithmetic device (mark generation means) that performs an operation for generating a mark corresponding to input defect information, and reference numeral 2 denotes a mark for printing a mark on a web based on data output from the arithmetic device 1. A printing unit (mark printing means), 3 is a defect detection unit such as an automatic visual inspection apparatus that outputs defect information to the arithmetic unit 1, 4 is a production machine that performs printing / processing on the web, and 5 is a web of a winding body. A paper feed unit 6 to be unwound, a paper discharge unit 6 on which a web is wound to form a winding body, and a web 7 that is transferred in the direction of an arrow.
[0013]
The computing device 1 can be constituted by a main body of a computer such as a personal computer or a workstation. When the defect detection unit 3 performs a web quality inspection and detects a defect, the defect detection unit 3 outputs the defect information to the arithmetic unit 1. If the production machine is a gravure printing machine, information on the type of defect such as doctor streaks, ink splash, oil dripping, dirt, poor color, misregistration, reprinting, web wrinkles, web splices, etc. In addition, information on the degree of failure such as density and density, and information on the position and range of failures such as surface loss and total loss are included.
When such defect information is input, the arithmetic unit 1 generates a mark corresponding to the defect information, and outputs data to the mark printing unit 2 at a timing so that the mark is printed on the defective portion of the web. Therefore, web transport distance data is input to the computing device 1 (not shown), and computation is performed to match the defect detection position on the web with the marking position.
The mark printing unit 2 is a printing unit such as an ink jet system, and inputs mark data from the arithmetic device 1 and prints the mark on the web. The mark will be described later.
[0014]
FIG. 2 is a diagram schematically showing the configuration of the defect indication mark detection device and peripheral device of the present invention. In FIG. 2, 8 is a mark detection unit that detects a mark printed on the web and generates a mark signal, 9 is a calculation unit that reproduces defect information from the mark signal, and 10 is an output for performing defect processing based on the defect information. A signal output unit for generating data, 11 is a production machine for processing defects in the web, 12 is a paper feeding unit for unwinding the web of the winder, and 13 is wound to form the winder. A paper discharge unit 14 is a web transported in the direction of the arrow.
[0015]
The mark detection unit 8 can be an image sensor camera using a device such as a CCD, MOS, or imaging tube, a line sensor camera using a solid element such as a CCD or MOS, or other scanning sensors. When an image sensor is used, a high-speed shutter is used, or a web that is transferred is imaged using a strobe light emitting device that emits instantaneous light. When a line sensor camera is used, the scanning is performed with the scanning of the line sensor camera as the main scanning and the web transfer as the sub scanning.
In the case of a specific type of mark such as a bar code mark, a mark detection device dedicated to that mark can be used. The mark detection unit 8 makes an appropriate selection according to the characteristics and types of marks printed on the web.
[0016]
A mark signal obtained by imaging or the like is input to the calculation unit 9. In the arithmetic unit 9, the defect information is reproduced from the mark signal. For example, when the mark signal is a barcode reading signal, code data is immediately obtained from the mark signal by known signal processing. By creating a correspondence data table between the code data and the defect information in advance, the defect information can be reproduced. That is, in the above-described defect instruction mark printing apparatus, information is converted in the order of (defect information) → (corresponding data table) → (code data) → (mark), and the mark is printed. On the other hand, in the defect indication mark detection device, information is converted in the order of (mark) → (code data) → (corresponding data table) → (defective information), and defective information is reproduced.
[0017]
When the defect information is reproduced, output data for performing defect processing based on the defect information is generated in the signal output unit 10. For example, when the defect information indicates a surface loss, a process for removing only the defective surface is performed, and when the defect information indicates a total loss, a process for removing the entire web in the defect range is performed. The output data includes control instruction data indicating the range of such a defect and stopping the web transfer at that position of the web. The output data includes data indicating the type and degree of failure, and includes data for display so that the removal process can be performed accurately and easily.
[0018]
For example, when a printing plate has a plate pattern of the same pattern of multiple rows and multiple columns on a printing plate, a defect occurs only on a specific surface, and foreign matter adheres to the printing plate. In the case of a defect in which a part is scratched, a surface damage occurs. In addition, for example, in the case of multi-sided printing in which a plurality of the same patterns are printed in the direction perpendicular to the web transfer direction, a defect occurs only on a specific surface, and in the case of a defect such as a doctor stripe in gravure printing It will be a flaw.
In the case of surface damage, the web printed with a wide width is removed in the case of slitting it into a small roll with a narrow width in a subsequent process.
On the other hand, the total loss is a defect that occurs in the entire web, for example, a printing register defect or a color tone defect. In this case, the entire range of the defective section of the web is removed.
[0019]
FIG. 3 is a diagram showing an example of the mark shape corresponding to the defect information and the printing position thereof. FIG. 3A shows a mark printed with the web ears (margins at both ends) as a defective information recording unit. A mark is printed at a position coinciding with the defect occurrence position in the web transfer direction, and a mark whose width is reduced in the information recording unit so as to correspond to the defect occurrence position in the width direction of the web (direction perpendicular to the transfer direction). Printed. In this manner, the mark indicates the distinction between the surface loss and the total loss, the position of the surface loss, and the like.
In FIG. 3B, a printed pattern is multifaceted in the width direction of the web, and there is a blank portion between the surfaces, and the blank portion is used as a defective information recording unit. Each surface can have a defective information recording portion, and the position of the surface loss is indicated by a mark. The total loss is indicated as a case where a mark indicating a defect is printed on all of the defective information recording portions on each side.
[0020]
FIG. 4 is a diagram illustrating an example in which a mark has a process attribute indicating a defect generation process and a defect attribute such as a defect type. In FIG. 4A, as shown in the correspondence table, when the generation process is “printing process”, the color of the mark is “red”, and when the generation process is “synthesis process”, the mark color is changed. When the color is “blue” and the generation process is the “slitter process”, the generation process can be distinguished from the print color of the mark, such as “green”.
Once the defect generation process is known, the cause of the defect can be appropriately dealt with, and other winding bodies manufactured under the same conditions can be searched for in the process, ensuring the removal of defects in the subsequent process. Can be done.
[0021]
In FIG. 4B, as shown in the correspondence table, the mark code is “01” when the defect type is “scratch”, and the mark code is set when the defect type is “wrinkle”. When “02” is set and the defect type is “registration misalignment”, the generation process can be distinguished from the mark code such that the mark code is “03”. As such a mark, a bar code mark, an OCR character mark, and other marks having code information can be used.
If the type of defect is known, the cause of the defect can be appropriately treated, and the product can be classified according to the type of defect depending on whether it is a serious defect or a minor defect.
[0022]
FIG. 5 shows an example in which marks are printed at the start and end positions of defects on the web. In FIG. 5, a start mark indicating a defect start position and an end mark indicating an end position are arrow marks, which are arrows pointing in the direction in which defects exist on the web. Such marks are suitable for indicating a relatively wide range of defects in the web transfer direction, such as doctor streaks, poor color tone, and poor registration. In the winding machine manufacturing and processing machine, the end position of the web alternately changes to the start position, and the start position of the web alternately changes to the end position every time one step is performed. Similarly, a defective end mark alternately changes to a start mark and a start mark changes to an end mark. However, if an arrow mark is used, the position of the defect is clearly indicated.
[0023]
FIG. 6 shows an example in which marks are printed before the start position and after the end position of defects on the web. In FIG. 6, the pre-start mark indicating the front of the defect start position and the post-end mark indicating the end position are arrow marks, which are arrows pointing in the direction in which the defect exists on the web. Although this mark has the same defect indication function as in FIG. 5, it is possible to easily control the web transfer to stop at the defective position by detecting the pre-start mark or post-end mark in the defect removal process. it can.
If the mark is printed at a predetermined distance before the start position of the defect and a predetermined distance after the end position, after detecting the mark in the defect removal step, the web may be transferred and stopped at the predetermined distance. When the end mark and start mark shown in FIG. 5 and the post-end mark and pre-start mark shown in FIG. 6 are used in combination, the web transfer is decelerated upon detection of the post-end mark or pre-start mark, and the end mark or start mark is detected. It is possible to perform control for stopping the web transfer upon detection. In this case, the mark of FIG. 5 and the mark of FIG.
[0024]
【The invention's effect】
As described above, according to the present invention, secondary defects such as wrinkles are not generated on the web, it is a safe operation, the defect position and the defect content are accurately instructed to the defect sampling process, and the web print pattern and There is provided an apparatus capable of printing and detecting a mark that can be read without being affected by a tint block or the like.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a configuration of a defect instruction mark printing apparatus and peripheral devices according to the present invention.
FIG. 2 is a diagram schematically showing a configuration of a failure instruction mark detection device and a peripheral device according to the present invention.
FIG. 3 is a diagram illustrating an example of a mark shape corresponding to defect information and a printing position thereof.
FIG. 4 is a diagram illustrating an example in which a mark has a defect attribute such as a process attribute indicating a defect generation process and a defect type;
FIG. 5 shows an example in which marks are printed at the start and end positions of defects on the web.
FIG. 6 shows an example in which marks are printed before the start position and after the end position of defects on the web.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Computation device 2 Mark printing part 3 Defect detection part 4 Production machine 5, 12 Paper feed part 6, 13 Paper discharge part 7, 14 Web 8 Mark detection part 9 Calculation part 10 Signal output part 11 Production machine

Claims (4)

Mark generating means for generating a mark corresponding to the inputted defect information and generating a mark printed on a margin portion between the surfaces of the web in which the printed pattern is multi-faced in the width direction, and the mark A defect-indicating mark printing apparatus comprising: a mark printing unit that prints a mark on a blank portion of the web . 2. The defect indication mark printing apparatus according to claim 1, wherein the mark is an arrow mark that is printed at a defect start position and / or an end position on the web and faces in the direction in which the defect exists . 2. The defect indication mark printing apparatus according to claim 1, wherein the mark has a process attribute for determining a defect generation process and / or a defect attribute for determining a defect type . Mark detection means for generating a mark signal by detecting a mark printed in a margin between the faces of a web on which a printed pattern is multi-faced in the width direction, and a calculation means for reproducing defect information from the mark signal And an output means for generating output data for performing defect processing based on the defect information.

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