WO2016208022A1

WO2016208022A1 - Web meandering control device and control method

Info

Publication number: WO2016208022A1
Application number: PCT/JP2015/068287
Authority: WO
Inventors: 幸一村松; 毅黒田; 成彰笹崎
Original assignee: 株式会社ニレコ
Priority date: 2015-06-25
Filing date: 2015-06-25
Publication date: 2016-12-29
Also published as: JPWO2016208022A1; EP3315440A4; TWI707217B; TW201704917A; EP3315440B1; JP5851671B1; EP3315440A1

Abstract

In the present invention, a web end (1E), which is an end in the width direction perpendicular to the travel direction of a web (1), and a picture end (1A1), which is an end in the width direction of each picture (1A) repeatedly printed along the travel direction on the web (1), are detected at a first position in the web travel direction. A web end detection signal (G1) showing the detected web end (1E) and a picture end detection signal (G2) showing the detected picture end (1A1) are captured, and a control signal for aligning the picture end (1A1) with a preset picture end reference position (P1) is generated. The web is moved in the width direction by the control signal.

Description

Web meandering control device and control method

The present invention relates to a web meandering control device and a control method for controlling the meandering of a web on which a picture is printed based on the picture standard.

5 (a) and 5 (b) show a conventional web meandering control device applied to a web processing device. The web 1 is rewound from the rewind reel 2, guided by the deflector roller 3 A and the guide roller 3 B, travels in the direction of the arrow X, and is subjected to predetermined processing by the processing device 4. Note that a web traveling mechanism for traveling the web 1 is not shown.

FIG. 6 shows an example of the plane of the web 1. For example, on the upper surface of the web 1, the same pattern 1 A is printed in a plurality of rows (in the example of FIG. 6, 5 rows in the width direction, which is the Y direction orthogonal to the arrow X direction). The intervals between adjacent rows are equal to each other, and the pattern 1A in each row is repeatedly printed at a constant pitch along the running direction indicated by the arrow X of the web 1.

There are various types of processing devices 4, and one example thereof is a vertical cutting device that cuts the web 1 so as to cut it into a plurality of pieces along the arrow X direction. For example, the web 1 that has reached the processing device 4 is cut for each row at intervals of the pattern 1A in each row, and becomes a plurality of cut pieces 1B.

The processing apparatus 4 cuts the web 1 so that the widths of the cut pieces 1B in the arrow Y direction are equal to each other and the pattern 1A is positioned at the center position in the width direction of each of the cut pieces 1B. The left and

right margin portions

1C and 1D in the web 1 are removed by cutting with the processing device 4. Another example of the processing device 4 is a punching processing device that punches and separates only the pattern 1A from the web 1 individually. Of course, the processing device 4 is not limited to these two examples, and there are various types.

By the way, when the processing device 4 is a vertical cutting device, if the running position of the web 1 is shifted in the width direction that is the arrow Y direction, the pattern 1A may be shifted from the center of the cut piece 1B, or the pattern There arises a problem that 1A is cut. Even if the processing device 4 is the punching processing device described above, if a shift occurs in the width direction with respect to the travel position of the web 1, the pattern 1A cannot be accurately punched along its outer periphery, and the pattern 1A The problem arises that is disconnected.

Therefore, the running position of the web 1 in the width direction is controlled by the web meandering control device. As shown in FIG. 5, the web meandering control device includes a web end sensor 5 that detects a travel position of the web 1 in the width direction, an actuator 6 that moves the rewind reel 2 in the arrow Y direction, and a web end sensor. And an actuator control unit 7 that controls the actuator 6 in accordance with the detection result of 5.

The web end sensor 5 is a sensor that optically detects, for example, the position of an end portion (hereinafter referred to as “web end portion”) 1E of the web 1 in the arrow Y direction. That is, it is disposed between the deflector roll 3A and the guide roller 3B.

In the actuator controller 7, a web end reference position, which is a reference position of the web end 1E, is set in advance, and the web end detection signal detected by the web end sensor 5 and the web end reference position are set. A control signal is transmitted to the actuator 6 so that the difference between them is within a predetermined threshold.

The actuator 6 operates according to the control signal received from the actuator control unit 7 to move the rewinding reel 2 in the arrow + Y direction or the −Y direction so that the web end 1E matches the web end reference position. Next, the position of the web 1 in the arrow Y direction is corrected.

As described above, the conventional web meandering control device keeps the position of the web 1 in the arrow Y direction constant by monitoring the web end 1E, and the above-described problems occur when processing by the processing device 4. I am trying not to.

However, the following problem arises only by controlling to keep the web edge 1E constant. That is, as shown in FIG. 7, at different positions of the web 1 in the arrow X direction, a distance L0 from the web end 1E to the end 1A1 of the pattern 1A in the arrow Y direction (hereinafter referred to as “pattern end”). Are printed differently, it is only necessary to control the web edge 1E to match the web edge reference position as described above. For example, when the processing device 4 is the longitudinal cutting device described with reference to FIG. In this case, the design 1A is displaced from the center of the cut piece 1B, or the design 1A is cut to cause a problem that the product becomes defective. Similarly, when the processing device 4 is the punching processing device described above, the pattern 1A cannot be accurately punched along the outer periphery, and the pattern 1A is cut, resulting in a defective product. Arise.

Therefore, as shown in FIG. 8, when printing the pattern 1 A on the web 1, at the same time, a line 1 F is printed in the vicinity of the end that does not affect the pattern 1 A, and the web 1 is transferred to the processing device 4. At the time of feeding, the line sensor 8 arranged in place of the web edge sensor 5 detects the line 1F, and the actuator controller 7 and the actuator 6 adjust the line 1F to a preset line reference position. There has been proposed a method of correcting the shift of the pattern 1A by controlling the shift of the web 1 in the arrow Y direction.

However, in this method, when the pattern 1A is printed on the web 1, it is necessary to always print the line 1F, which causes a problem that extra printing ink is consumed.

In order to solve such a problem, there has been proposed a web meandering control device that controls the travel of the web 1 so that the pattern end 1A1 of the web 1 matches a preset pattern end reference position ( Patent Document 1).

This web meandering control device is the web meandering control device described with reference to FIG. 5, as shown in FIG. 9, a pattern 1 A is provided near the guide roller 3 B immediately downstream of the web edge sensor 5 and immediately before the processing device 4. A picture detection camera 9 to be imaged is additionally provided. The control in this case is performed as follows.

The amount of deviation of the pattern end 1A1 from the pattern end reference position is detected from the image of the pattern 1A captured by the pattern detection camera 9, and this is used as a correction signal. When the actuator control unit 7 controls the actuator 6 so that the deviation from the web end reference position of the web end 1E detected by the web end sensor 5 becomes zero, the web end reference position Is corrected by the correction signal.

For example, when the deviation of the pattern end 1A1 from the pattern reference position is a deviation in the + Y direction, the web edge reference position is corrected in the −Y direction by the correction signal. Further, when the deviation of the pattern end 1A1 from the pattern reference position is a deviation in the −Y direction, the web edge reference position is corrected in the + Y direction by the correction signal. By performing the control for correcting the web edge reference position in this way, the running of the web 1 is controlled so that the pattern edge 1A1 becomes the pattern reference position.

JP 2009-122973 A

However, in the web meandering control apparatus described with reference to FIG. 9, the web end sensor 5 is disposed near the rewinding reel 2, and the pattern detection camera 9 is disposed immediately before the downstream processing apparatus 4 away therefrom. Therefore, the response delay due to the feedback control of the pattern edge detection signal based on the image captured by the pattern detection camera 9 is larger than the response delay due to the feedback control based on the web edge detection signal detected by the web edge sensor 5. , Hunting is likely to occur and the control becomes unstable.

Therefore, it is conceivable that the gain of the picture end detection signal is made smaller than the gain of the web end detection signal, or the picture end detection signal is filtered. In this case, the picture detection camera 9 takes an image. Thus, it becomes impossible to effectively use the detected pattern end detection signal.

An object of the present invention is to provide a web meandering control apparatus and method capable of controlling the width direction of the web traveling position with good controllability on the basis of a pattern.

In order to solve the above-described problem, a web meandering control device according to a first aspect of the present invention provides a web end portion that is an end portion in the width direction orthogonal to the traveling direction of the web in the first traveling direction of the web. Web edge detection means for detecting at a position, and pattern edge detection for detecting at the first position a pattern edge that is an edge in the width direction of a pattern repeatedly printed on the web along the running direction Image edge detection signal detected by the web edge detection signal detected by the web edge detection means and the pattern edge detection signal detected by the pattern edge detection means, and the pattern edge reference position preset the pattern edge Control signal generating means for generating a control signal for aligning with the actuator, and an actuator for moving the web in the width direction by the control signal output from the control signal generating means.

According to a second aspect of the present invention, in the web meandering control device according to the first aspect, the web edge detection means and the pattern edge detection means are configured by a single imaging means, and within the field of view of the imaging means A web edge and the pattern edge are detected.

The invention according to claim 3 is the web meandering control device according to claim 2, wherein the imaging means is a two-dimensional imaging means arranged at the first position, or the web at the first position. It is a one-dimensional imaging means arranged along the width direction.

According to a fourth aspect of the present invention, in the web meandering control device according to the first, second, or third aspect, the control signal generating unit is responsive to a comparison result between the pattern end detection signal and the pattern end reference position. The web edge reference position is selected, and the control signal is generated according to a comparison result between the selected web edge reference position and the web edge detection signal.

The invention according to claim 5 includes a web end portion that is an end portion in the width direction orthogonal to the running direction of the web and an end portion in the width direction of the pattern that is repeatedly printed on the web along the running direction. A certain pattern end is detected at a first position in the traveling direction of the web, and a detected web end detection signal indicating the detected web end and a detected pattern end detection signal indicating the detected pattern end. And generating a control signal for aligning the pattern edge with a predetermined pattern edge reference position, and moving the web in the width direction by the control signal.

The invention according to claim 6 is the web meandering control method according to claim 5, wherein the web edge and the picture edge are detected by a single imaging means.

The invention according to claim 7 is the web meandering control method according to

claim

5 or 6, wherein the web edge reference position is selected according to a comparison result between the pattern edge detection signal and the pattern edge reference position. The control signal is generated according to a comparison result between the selected web edge reference position and the web edge detection signal.

According to the present invention, since the web edge and the pattern edge are detected at the first position in the running direction of the web, the web edge detection signal and the pattern edge detection signal can be handled with the same gain, and the delay Occurrence of hunting due to the difference can be prevented, and controllability is improved.

(A) is a top view of the web meandering control apparatus of the Example of this invention, (b) is a side view. It is explanatory drawing of a part of web imaged with the imaging device of the web meandering control apparatus of a present Example. It is explanatory drawing of the actuator control part of the web meandering control apparatus of a present Example. It is explanatory drawing of the control by the pattern reference | standard of the web meandering control apparatus of a present Example. (A) is a top view of the conventional web meandering control apparatus, (b) is a side view. It is explanatory drawing of the web on which the pattern which drive | works the conventional web meander control apparatus was printed. It is explanatory drawing in which the shift | offset | difference of the width direction has generate | occur | produced in the pattern printed in the running direction of the web. It is explanatory drawing of the example in which the line is printed with the pattern in the running direction of the web. It is explanatory drawing of the conventional web meandering control apparatus which detects a web edge part and a pattern edge part, and controls driving | running | working of a web on the basis of a pattern.

Hereinafter, a web meandering control apparatus according to one embodiment of the present invention will be described. The same components as those described in FIGS. 5 to 9 are denoted by the same reference numerals, and the description thereof is omitted. In this embodiment, as shown in FIG. 1, the web edge sensor 5 disposed between the deflector roller 3A and the guide roller 3B is removed, and an imaging device 10 composed of a CCD camera is fixed above the deflector roller 3A. Deploy. In addition, illustration of the light source which irradiates the area | region imaged with the imaging device 10 is abbreviate | omitted.

As shown in FIG. 2, the imaging device 10 captures and captures the web edge 1 E and the pattern edge 1 A 1 with one visual field 10 A, and the captured image is processed by the image processor 11. A web edge detection signal G1 indicating the position of the edge 1E and a pattern edge detection signal G2 indicating the position of the pattern edge 1A1 are generated.

Thus, in the present embodiment, the web end 1E and the pattern end 1A1 are detected at the same position in the traveling direction indicated by the arrow X of the web 1 and these detection signals G1 and G2 are sent to the actuator controller 12. .

In addition, as shown in FIG. 2, the web edge part 1E is an edge part of the right side seeing from the running direction of the web 1 shown by the arrow X. As shown in FIG. The pattern end 1A1 is the right end as viewed from the traveling direction of the pattern 1A closest to the end 1E of the web 1.

The actuator control unit 12 is configured as shown in FIG. 12a is a first comparison unit, 12b is a web end reference position storage unit in which data of a web end reference position is stored, 12c is a second comparison unit, and 12d is data of one or more pattern end reference positions. Is a pattern end reference position storage unit.

The actuator controller 12 reads the pattern edge detection signal G2 created by the image processor 11 and the pattern read according to the processing position of the web 1 performed by the processing device 4 from the pattern edge reference position storage unit 12d. The end reference position is compared by the second comparison unit 12c, and a selection signal is created based on the obtained difference. By this selection signal, the web edge reference position storage unit 12b reads the web edge reference position. Then, the web end reference signal G1 created by the image processing unit 11 and the web end reference position read from the web end reference position storage unit 12b are compared by the first comparison unit 12a. A control signal corresponding to the difference is generated and output to the actuator 6.

The control operation will be described with reference to FIG. As shown in FIG. 4A, when the pattern end 1A1 is shifted by L1 in the + Y direction from the pattern end reference position P1 read from the pattern end reference position storage unit 12d, the amount of deviation A selection signal corresponding to the magnitude of L1 and the direction of deviation is generated by the second comparison unit 12c. As a result, the web edge reference position read from the web edge reference position storage unit 12b becomes the web edge reference position Q1 shifted by L1 in the -Y direction. The actuator controller 12 generates a control signal corresponding to the comparison result between the web edge detection signal G1 and the web edge reference position Q1, and transmits the control signal to the actuator 6. In the actuator 6, the rewind reel 2 is moved in the arrow -Y direction so that the web end 1E moves in the arrow -Y direction.

The control of the web edge 1E is such that even if the current picture 1A deviates from the field of view 10A of the image pickup device 10, the selection signal remains unchanged, and the next picture 1A is picked up by the image pickup apparatus 10 and the picture of the next picture 1A is displayed. Continue until end 1A1 is detected. Then, when the pattern end 1A1 of the next pattern 1A is detected, the second comparison unit 12c updates the selection signal, and the same control is performed by the updated selection signal.

As a result of such control being repeated, as shown on the right side of FIG. 4A, the end 1A1 of the pattern 1A comes to coincide with the pattern reference position P1.

When the pattern end 1A1 is displaced by L2 in the −Y direction from the pattern end reference position P1 read from the pattern end reference position storage unit 12d, as shown in FIG. Contrary to the control of FIG. 4A, control for moving the rewind reel 2 in the arrow + Y direction is performed, and as shown on the right side of FIG. 4B, the end 1A1 of the pattern 1A is positioned at the pattern reference position. Matches P1.

Through the control described above, the actuator 6 is repeatedly controlled to move the rewind reel 2 in the direction of the arrow -Y or + Y, so that the pattern end 1A1 and the web end 1E Even if the interval L0 is different as described with reference to FIG. 7, the pattern end 1A1 sent to the processing apparatus 4 matches the pattern end reference position P1. By selecting the pattern end reference position P1 in advance according to the processing position in the processing device 4, the meandering control of the web 1 is controlled at the pattern end reference position P1, and the processing device 4 can perform accurate processing. It becomes.

In the present embodiment, the pattern end 1A1 and the web end 1E are detected at the same travel position in the arrow X direction of the web 1 (the position of the deflector roller 3A). It can be taken into the actuator controller 12 simultaneously with the web edge detection signal G1. For this reason, both signals G1 and G2 can be handled with the same gain, and it is not necessary to adjust the gain of the picture end detection signal G2 or perform processing such as filtering, and the picture end detection signal G2 is effective. It can be used and the controllability is improved.

In this embodiment, the two-dimensional imaging device 10 such as a CCD camera is used. However, a one-dimensional imaging device such as a line sensor can also be used. In this case, if the one-dimensional imaging device is arranged in the width direction of the web 1, the web end 1E and the pattern end 1A1 can be detected simultaneously.

In this embodiment, the web edge 1E and the pattern edge 1A1 are detected by the single imaging device 10 at the same position in the traveling method of the web 1. However, the web edge detection means and the pattern for detecting the web edge 1E are detected. You may comprise separately the pattern edge part detection means which detects edge part 1 A1, and may arrange | position in the same position of the running direction of a web.

In this embodiment, the image processing unit 11 generates a web edge detection signal G1 and a pattern edge detection signal G2, and takes these signals G1 and G2 into the actuator control unit 12 to perform calculation and control the actuator 6. However, the present invention is not limited to this. For example, the image processing unit 11 detects the web edge detection signal G1 and the pattern edge detection signal G2 and calculates the signals G1 and G2 to generate a control signal by the same calculation as described in FIG. The control signal may be sent to the actuator control unit 12 so that the actuator 6 may be controlled by the actuator control unit 12. In this case, the control signal generated by the image processing apparatus 11 is amplified by the actuator control unit 12. As described above, the control signal for controlling the actuator 6 may be generated by either the image processing unit 11 or the actuator control unit 12, and the image processing unit 11 and the actuator control unit 12 are combined to generate a control signal. It can be called means.

In the present embodiment, the case where the meandering control is performed on the basis of the pattern repeatedly printed at a constant pitch in the traveling direction indicated by the arrow X on the web 1 is described. However, as the pattern used for the meandering control of the present embodiment, It is not limited to a pure pattern that will be cut out later. For example, a cut mark indicating the cut position of a pure pattern, a register mark for meander control during printing, a registration mark, etc. are repeatedly printed at a constant pitch in the running direction and finally removed. However, since these can be handled in the same manner as the picture described above in the meandering control, they are also included in the picture.

1: Web, 1A: Pattern, 1B: Cut piece, 1C, 1D: Margin portion, 1E: End of web, 1F: Line 2: Rewinding reel 3A: Deflector roller, 3B: Guide roller 4: Processing device 5: Web End sensor 6: Actuator 7: Actuator control unit 8: Line sensor 9: Picture detection camera 10: Imaging device 11: Image processing unit 12: Actuator control unit

Claims

Web end detection means for detecting a web end that is an end in the width direction orthogonal to the running direction of the web at a first position in the running direction of the web;
A pattern end detecting means for detecting, at the first position, a pattern end that is an end in the width direction of a pattern repeatedly printed on the web along the traveling direction;
To capture the web edge detection signal detected by the web edge detection means and the pattern edge detection signal detected by the pattern edge detection means, and align the pattern edge to a preset pattern edge reference position. Control signal generating means for generating a control signal of
An actuator for moving the web in the width direction by the control signal output from the control signal generating means;
A web meandering control device comprising:
In the web meander control device according to claim 1,
The web meandering control device, wherein the web edge detecting means and the picture edge detecting means are constituted by a single imaging means, and the web edge and the picture edge are detected within the field of view of the imaging means. .
In the web meandering control device according to claim 2,
The image pickup means is a two-dimensional image pickup means arranged at the first position, or a one-dimensional image pickup means arranged at the first position along the width direction of the web. Meander control device.
In the web meandering control device according to claim 1, 2, or 3,
The control signal generation unit selects a web edge reference position according to a comparison result between the pattern edge detection signal and the pattern edge reference position, and the selected web edge reference position and the web edge detection A web meandering control device that generates the control signal according to a comparison result with a signal.
A web end that is an end in the width direction orthogonal to the running direction of the web and a pattern end that is an end in the width direction of the pattern that is repeatedly printed on the web along the running direction, respectively. Detecting at a first position of the web in the direction of travel;
A control signal for taking in the detected web edge detection signal indicating the edge of the web and the detected pattern edge detection signal indicating the pattern edge to align the pattern edge with a preset pattern edge reference position Produces
Moving the web in the width direction by the control signal;
The web meander control method characterized by the above-mentioned.
In the web meander control method according to claim 5,
The web meandering control method, wherein the web edge and the pattern edge are detected by a single imaging means.
The web meander control method according to claim 5 or 6,
A web edge reference position is selected according to a comparison result between the pattern edge detection signal and the pattern edge reference position, and according to a comparison result between the selected web edge reference position and the web edge detection signal. The web meander control method, wherein the control signal is generated.