JP3701402B2 - Defect instruction method and apparatus, and defect removal method and apparatus - Google Patents

Description

[0001]
[Industrial application fields]
The present invention is a web that is wound up after a manufacturing process in a web production machine (including a processing machine) such as an offset printing machine, a gravure printing machine, a coating machine, a laminator, a papermaking machine, and a plastic sheet manufacturing apparatus. The present invention relates to a defect indicating method and apparatus for indicating the position of a defective part by marking on a web, and a defect removing method and apparatus for identifying the position of the defective part from the marking and removing the defect.
In particular, marking is performed by setting an interval according to the content of the defect, and a mark (indicating mark) marked as such is detected, the content of the defect is identified from the interval, and whether or not the defect is removed is determined. The present invention relates to a determination method and apparatus.
[0002]
[Prior art]
In a production machine in which the form of the product is a web winding body, it is difficult to remove the generated defect on the spot. For this reason, it is usually removed in a later step, but it is necessary to specify the position of the web defect at that time. Therefore, in order to indicate the defect position, (1) tape and label insertion and sticking at the edge of the web, and (2) mark king by ink jet or laser irradiation on the margin of the web are known. It has been.
In this case, the defect position indication is not only the defect start position and defect end position, but also the position before the defect start position and the position behind the defect end position so that the defect removal can be easily performed by a device in a subsequent process. Is also directed to.
[0003]
There are various types and forms of defects that occur in web production machines. When the defect removal operation can be made the same regardless of the content of the defect, it is only necessary to identify the defect position, and it is not necessary to identify the defect content. However, the removal method and the removal process usually differ depending on the content of the defect.
For example, when gravure printing is performed on a soft packaging material such as a plastic film, the pattern is usually printed with a wide width (around 1 m) and a narrow width (1/2 to 1 of the wide width) in the subsequent slit process. / 10)). In the case where the content of the defect extends over the entire multi-faced pattern such as a poor color tone caused by the printing ink color, it is efficient in terms of work man-hours to remove the defect with a wide winding body. However, when the defective content covers only a part of a multi-faced pattern such as a doctor line, it is advantageous in terms of good product yield to perform defective removal with a narrow winding body.
[0004]
As a method of instructing the content of the defect, (1) the defect content is encoded (for example, barcoded) and marked, and (2) the web width direction (perpendicular to the web transfer direction) is detected by the detected defect content. (3) Marking by changing the position of (direction), (3) Marking an absolute address on the web, and recording defect information corresponding to the absolute address.
As for defect removal, a defect removal operation is started by detecting a tape, a label, a mark or the like indicating a defect position or a deceleration position for defect removal with a sensor. Further, in order to detect a mark or absolute address of a defect content recorded on the web, the defect removal operation is started by reading the defect content with an imaging camera or a barcode reader.
[0005]
[Problems to be solved by the invention]
As described above, in order to remove a web defect, it is necessary to read and identify the defect content in a subsequent process. An imaging camera is used when reading a code or an absolute address of a defective content. However, when a speed required for reading (line speed in a subsequent process) is high, misrecognition or reading becomes impossible, which is not practical. Further, a means for storing the defect information corresponding to the read code and the absolute address is required, and there remains a difficulty in obtaining consistency between the marking code and the absolute address and the defect information obtained by the inspection apparatus.
In addition, the margin of the web (the margin on both sides of the web provided in consideration of meandering during transportation) is a wasted part, so it has been reduced to the limit, and the code and absolute address information in the width direction There is no room for printing. Furthermore, since marking in the width direction requires a plurality of marking devices or devices capable of wide marking in the width direction, there is a drawback that the system configuration becomes expensive.
SUMMARY OF THE INVENTION An object of the present invention is to provide a simple method and apparatus capable of instructing a web on a defect position and defect content and reliably specifying the position and content even on a high-speed line.
[0006]
[Means for Solving the Problems]
The defect indication method and apparatus of the present invention classify defect contents from defect data on a web, and perform marking at intervals defined for each defect content from a predetermined position in front of the defective part of the web to the defective part. Each of the markings is performed on the web from the end of the defective portion of the web to a predetermined position behind the defective portion, and at a predetermined interval with respect to the defective portion in the region of the defective portion. Is. According to the present invention, since the defect position and the defect content are recorded in the form of the marking interval, it can be reliably recorded with a simple device in a slight margin of the web. Further, the defect removal method and apparatus of the present invention is based on the transfer signal output by measuring the transfer distance of the web and the detection signal output by detecting the instruction mark recorded on the web. The mark interval is calculated, and it is determined whether or not the defect removal operation is performed based on the interval. According to the present invention, since the determination is made based on the interval between the instruction marks, the defect position and the defect content can be reliably identified with a simple device even in a high-speed line.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described. First, the defect instruction method and apparatus of the present invention will be described, and then the defect removal method and apparatus of the present invention will be described.
FIG. 1 is an explanatory diagram showing an example of a configuration for carrying out the failure instruction method and apparatus of the present invention. In FIG. 1, reference numeral 1 a denotes a paper supply side winding body, 1 b denotes a paper discharge side winding body, 2 denotes a web to be inspected, 3 a, 3 b, 3 c, 3 d, and 3 e denote guides for conveying the web 2. Laura. Further, 4 is a paper feeding unit for unwinding the web 2 from the winding body 1a, 5 is an inspection device for inspecting the web 2, 6 is a marking device for marking the web 2, and 7 is a transfer state of the web 2 (distance / speed). ) Is a control device that inputs signals output from the inspection device 5 and the transfer measurement device 7 and outputs a signal that instructs the marking device 6 to perform marking. The winding body 1a to the control device 9 shown in FIG. 1 are normally supported by one frame and, in some cases, a plurality of frames, but the illustration of the frame is omitted in FIG.
[0008]
The paper feed unit 4 includes at least a mechanism that supports a winding body 1a that is a winding body of the web 2 so that the winding body 1a can rotate freely on its axis, and a brake mechanism that applies braking to the rotation of the shaft of the winding body 1a or a reverse rotation torque. And a mechanism for generating And the tension | pulling which pulls in the direction opposite to a transfer direction is applied to the web 2 unwound from the winding body 1a by those mechanisms. The web 2 unwound from the winding body 1a passes through the guide roller 3a, reaches between the guide roller 3b and the guide roller 3c, and the surface of the web 2 is imaged by the imaging camera of the inspection device 5. The image data obtained by imaging is compared with the reference image data in a data processing unit in the main body of the inspection apparatus 5 to inspect for the presence / absence of a defect and the content of the defect. As a result of the inspection, if there is a defect and the content of the defect is specified, the inspection device 5 outputs defect data (the presence / absence and content of the defect) to the control device 8.
[0009]
On the other hand, the web 2 passes through the guide roller 3d and the guide roller 3e and is wound around the paper discharge unit 9 to form a winding body 1b which is a winding body. The paper discharge section 9 has at least a mechanism for rotatably supporting a winding body 1a which is a winding body of the web 2 on its axis, and a rotational torque for rotating the shaft of the winding body 1b to wind the web 2. Generating mechanism. And the tension | pulling which pulls in the same direction as a conveyance direction is applied to the web 2 wound up by the winding body 1b by those mechanisms.
[0010]
In the transfer path of the web 2, a mechanism for detecting the transfer state (distance, speed) of the web 2 is provided. In the example shown in FIG. 1, the mechanism is a transfer measuring device 7. The transfer measuring device 7 includes a roller that is provided so as to sandwich the web 2 so as to face the guide roller 3 e and that rotates with the transfer of the web 2. The transfer measuring device 7 detects the transfer state of the web 2 by converting the rotation of the roller into an electric signal by a rotary encoder or the like. Further, the electric signal is converted into transfer data (distance data and speed data) in a data processing unit in the main body of the transfer measuring device 7, and the transfer measuring device 7 outputs the transfer data to the control device 8.
[0011]
As described above, the control device 8 inputs defect data from the inspection device 5 and transfer data from the transfer measurement device 7. And the control apparatus 8 produces | generates a marking signal based on those data, and outputs it to the marking apparatus 6. FIG.
As shown in FIG. 1, when the marking device 6 inputs a marking signal, the marking device 6 provided between the guide roller 3 d and the guide roller 3 e uses a marking head (for example, a marking head in an ink jet system). Mark the top margin.
[0012]
Next, marking processing (processing for generating a marking signal) performed by the control device 8 will be described. FIG. 2 is a flowchart showing the marking process. First, in step S1 in FIG. 2, the control device 8 determines whether or not there is input of defect data output from the inspection device 5 (detection of a defect on the web 2 and data regarding the content of the defect). . The process waits until there is an input of defective data. When there is an input of defective data, the process proceeds to the next step.
[0013]
In step S2, the control device 8 classifies the defect contents based on the input defect data. For example, in the case of a gravure printing machine, the contents of defects include poor color tone, misregistration, ink splashes, doctor lines, and the like. Of these, poor color tone and misregistration are defects that occur all over the entire width of the web 2, but ink splashes are applied only to the specific site where the web 2 has occurred, and doctor streaks are in the width direction of the web 2 (transfer It is a defect that occurs only in a part of the region in the direction orthogonal to the direction. Therefore, when removing the defect, there are a case where the web 2 may be removed in a wide state, and a case where the web 2 is removed after being processed into a narrow width may improve the yield of good products. Therefore, it is more reasonable to distinguish the defect removal process between the former defect and the latter defect. Therefore, the control device 8 classifies the defect contents so that the defect removal process can be specified based on the input defect data.
[0014]
In the case of ink splashes and doctor lines, the defect contents are classified so that the defect position in the width direction of the web 2 can be specified so that the defect can be easily removed in the defect removal process.
As described above, the control device 8 classifies the defect contents based on the input defect data, and assigns defects to a plurality of predetermined classifications. Corresponding to this predetermined classification, a marking interval described later is determined. That is, the classification of the defect content performed by the control device 8 is a process in which the control device 8 determines the marking interval based on the defect data, and the determination of the marking interval considers the work in the defect removal process as described above. Done.
[0015]
While the above-described defect data is input, the control device 8 inputs the transfer data output from the transfer measuring device 7. Based on this transfer data, the control device 8 calculates the current position of the web 2 where the marking head of the marking device 6 performs marking, and the current position of the defect on the web 2. In the marking according to the present invention, marking at intervals determined for each defect content is performed from a predetermined position in front of the defective portion of the web 2 to a defective portion and / or after the defective portion of the web 2 ends. Do on the web 2 to the position. This marking process is performed in steps S3 to S9 in FIG.
[0016]
First, in step S3, it is determined by the control device 8 whether or not the position of the web 2 under the marking head of the marking device 6 has reached a predetermined position ahead of where a defective portion of the web 2 begins. The process waits until a predetermined position ahead reaches the marking head, and when it reaches, the process proceeds to the next step.
In step S <b> 4, the control device 8 determines whether or not the position of the web 2 under the marking head of the marking device 6 is in front of the defective portion of the web 2. If it is in front, in step S5, the control device 8 outputs a marking signal to the marking device 6 at the interval indicating the above-described defect content, and returns to step S4 to repeat. As a result of this repetition, if the determination in step S4 is no longer in front, the process proceeds to the next step.
[0017]
In step S <b> 6, it is determined by the control device 8 whether or not the position of the web 2 under the marking head of the marking device 6 is inside the region of the defective portion of the web 2. If it is inside, in step S7, the control device 8 outputs a marking signal to the marking device 6 at an interval indicating a predetermined defective portion, returns to step S6, and repeats. As a result of this repetition, if the determination in step S6 is no longer in the region of the defective part, the process proceeds to the next step.
[0018]
In step S <b> 8, the control device 8 determines whether or not the position of the web 2 under the marking head of the marking device 6 is in front of a predetermined position behind the web 2. If it is in front, in step S9, the control device 8 outputs a marking signal to the marking device 6 at the interval indicating the above-described defect content, and returns to step S8 to repeat. As a result of this repetition, if the determination in step S8 is no longer in front of the predetermined rear position, the process proceeds to the next step.
In step S10, it is determined whether or not to end the marking process. When the transfer of the web 2 is completed, for example, the process ends. When the transfer is continued, the process returns to step S1 and the above process is repeated.
[0019]
Next, the instruction mark obtained on the web by the above-described marking process will be described. FIG. 3 is a diagram showing an example of the instruction mark marked on the web according to the present invention. In FIG. 3, the arrow → indicates the transfer direction of the web 2, and there are two defective parts, a defective part (1) and a defective part (2).
In addition, the instruction mark (3) is an instruction mark at intervals determined for each defect content from the predetermined position in front of the defective part to the defective part (defective content of the defective part (1)), and the instruction mark (4) is defective. The instruction mark (5) indicating the interval indicating the part is determined for each defect content (defective content of the defective part (1)) from the end of the defective part (defective part (1)) to a predetermined position behind it. It is an instruction mark for the interval.
In addition, the instruction mark (6) is an instruction mark at intervals determined for each defect content from the predetermined position in front of the defective part to the defective part (defective content of the defective part (2)), and the instruction mark (7) is defective. The instruction mark (8) indicating the interval indicating the part is determined for each defect content (defective content of the defective part (2)) from the end of the defective part (defective part (2)) to a predetermined position behind it. It is an instruction mark for the interval.
[0020]
The defective part (1) is a defect that exists only in a part of the web 2 in the width direction. The defective portion (2) is a defect existing in the entire width direction of the web 2. As described above, it is reasonable to separate the defect removal process for the defective part (1) and the defective part (2). Therefore, the interval between the indication marks marked on the indication mark (3) and the indication mark (5) and the interval between the indication marks marked on the indication mark (6) and the indication mark (8) are as shown in FIG. It is different. In this way, by changing the interval between the indication marks, by reading the interval between the indication marks in the defect removal process, it is possible to determine whether the defect should be removed in that process or in another process. Can be determined. Details of defect removal will be described later.
[0021]
The deceleration start point is before and after each of the defective part (1) and the defective part (2). The direction of arrow → shown in FIG. 3, that is, the transfer direction of the web 2 indicates the transfer direction when the marking process is performed. In the next step, the wound body that has wound the web 2 in the marking process is unwound in a direction opposite to the wound direction. Thus, since the web 2 is a winding body, the transfer direction is reversed every time one process proceeds. In any transfer direction, before the defective part arrives, the defective content is marked before and after the defective part so that the defective part exists and the defective content can be determined.
[0022]
The description of the defect instruction method and apparatus according to the present invention has been described above. Next, the defect removal method and apparatus according to the present invention will be described.
FIG. 4 is an explanatory view showing an example of a configuration for implementing the defect removal method and apparatus of the present invention. In FIG. 4, reference numeral 21 denotes a winding body to be subjected to defect removal, 22 is a web to be unwound from the winding body 21, 23 is a defective winding body in which a defective portion removed from the web 22 is wound, 24 a, 24b is a small winding body obtained by slitting narrowly, 25 is a paper feed unit, 26 is a sensor unit for detecting an instruction mark on the web 22, 27 is a defect removal unit, 28 is a paper discharge unit, and 29 is the whole , 30 is a transfer measuring device, 31 is a splicer of the defect removing unit 27, and 32 is a slitter of the paper discharge unit 28.
[0023]
The operation in the above configuration will be described. As shown in FIG. 4, the web 22 unwound from the winding body 21 set in the paper feeding unit 25 is guided to the guide roller and reaches the transfer measuring device 30. Then, the measurement of the transfer distance and speed of the web 22 is performed, and the measurement data is input to the control device 29. The web 22 reaches the next sensor unit 26 from the paper feeding unit 25. When the web 22 has a defective portion, the above-described defect instruction is performed in the previous step, and an instruction mark is marked from the deceleration start point. In that case, the instruction mark on the web 22 is detected by the sensor unit 26, and the detection data of the instruction mark is input to the control device 29.
[0024]
Next, the web 22 reaches the defect removing unit 27 from the sensor unit 26. In the defect removal unit 27, the transfer stop control of the web 22 is performed by the control device 29 so that the position immediately before the defective part of the web 22 is a position where the cutter of the splicer 31 is cut. At that position, the web 22 is cut, and the subsequent defective portion is wound up as a defective winding body 23. When the defective portion is wound, the web 22 is cut by the cutter at a position immediately after the defective portion is finished, and the defective portion is cut off. The splicer 31 connects the end portion of the downstream web 22 cut before removing the defective portion and the end portion of the upstream web 22 cut after removing the defective portion this time.
[0025]
The web 22 from which the defective portion has been removed by the defect removing unit 27 then reaches the paper discharge unit 28. By the slitter 32 of the paper discharge unit 28, the web 22 is cut in a direction parallel to the transfer direction (flow direction) and becomes wide. This narrow web 22 is wound up to obtain a plurality of small winding bodies 24a, 24b (only two are shown in FIG. 4).
[0026]
Next, a defect removal process (a process of detecting an instruction mark and stopping the web at a predetermined position) performed by the control device 29 will be described. FIG. 5 is a flowchart showing the process of defect removal processing. First, in step S <b> 101 in FIG. 5, it is determined whether or not an instruction mark detection signal output from the sensor unit 26 is input to the control device 29. The process waits until an instruction mark detection signal is input. When an instruction mark detection signal is input, the process proceeds to the next step.
In step S102, the control device 29 stores, as L _{n, the} web transfer distance at the time when the instruction mark detection signal is input based on the data output from the transfer measuring device 30. Then, n is replaced with n + 1 to prepare for the storage of the next web transfer distance.
[0027]
In step S103, the calculation control unit 29 based on the web transfer distance L _n stored this time with the web transfer distance L _n-1 of the previously stored distance indication mark D = a (L _n -L _n-1) To do.
Next, in step S104, the control device 29 determines whether or not the defect content to be removed in this step is based on the calculated instruction mark interval D. If it is not a defect content to be removed in this step, the process returns to S101 and the above process is repeated. On the other hand, if the defect content is to be removed in this process, the process proceeds to the next step.
[0028]
In step S <b> 105, the control device 29 decelerates the transfer speed of the web 22 and stops the transfer of the web 22 at a position where the position immediately before the defective portion becomes the position of the defect removing unit 27. In step S106, the above-described defect removal processing is performed.
Next, in step S107, it is determined whether or not to end the defect removal process. When the web 22 is unwound from the winding body 21 by a predetermined amount and the winding body 21 is replaced, the process ends. When continuing the defect removal process, in step S108, the transfer of the web 22 is resumed, the process returns to step S101, and the above process is repeated.
[0029]
【The invention's effect】
As described above, according to the defect indication method and apparatus of the present invention, the defect position and the defect content are recorded in the form of the marking interval, so that it can be reliably recorded with a simple device in a slight margin of the web. .
Further, according to the defect removal method and apparatus of the present invention, since the determination is made based on the interval between the indication marks, the defect position and the defect content can be reliably specified with a simple apparatus even on a high-speed line.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram showing an example of a configuration for carrying out a failure instruction method and apparatus according to the present invention.
FIG. 2 is a flowchart showing a marking process.
FIG. 3 is a diagram showing an example of a mark marked on a web according to the present invention.
FIG. 4 is an explanatory diagram showing an example of a configuration for implementing the defect removal method and apparatus of the present invention.
FIG. 5 is a flowchart showing a process of defect removal processing.
[Explanation of symbols]
1a, 1b, 21 Winding body 2, 22 Web 3a, 3b, 3c, 3d, 3e Guide roller 4, 25 Paper feed unit 5 Inspection device 6 Marking device 7, 30 Transfer measuring device 8, 29 Control device 9, 28 Ejection Paper part 23 Defective winding body 24a, 24b Small winding body 26 Sensor part 27 Defective removal part 31 Splicer 32 Slitter

Claims (4)

The defect contents are classified from the defect data of the web, and markings at intervals defined for each defect content are marked from a predetermined position in front of the defective part of the web to the defective part and / or after the defective part of the web is finished. A defect indication method comprising: marking each of the markings on the web from a predetermined position to a rearward position and marking at a predetermined interval in the defective portion region . A defect indicating device having inspection means, transfer measurement means, control means, and marking means, wherein the inspection means inspects a web and outputs defect data, and the transfer measurement means is a transfer distance of the web The control means inputs the defect data to classify the defect contents, and inputs the transfer signal to mark the interval defined for each defect content on the web. From the predetermined position in front of the defective portion to the defective portion and / or from the end of the defective portion of the web to the predetermined position behind the defective portion, and marking at a predetermined interval for the defective portion in the region of the defective portion Generating a marking signal for performing each marking on the web, and the marking means inputs the marking signal on the web. An instruction mark is recorded on the defect indicating device. Based on the transfer signal that is output by measuring the transfer distance of the web and the detection signal that is output by detecting the indication mark recorded on the web, the interval between the indication marks is calculated, and the defect is caused by the interval. A defect removal method comprising determining whether or not to perform a removal operation. A defect removal apparatus having a transfer distance measuring means, a mark detecting means, and a control means, wherein the transfer distance measuring means measures a transfer distance of a web and outputs a transfer signal, and the mark detecting means is on a web. Whether the control mark is recorded and output a detection signal, the control means inputs the transfer signal and the detection signal, calculates an interval between the indication marks, and performs a defect removal operation based on the interval A defect removal apparatus characterized by determining whether or not.

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