TWI707217B - Snaking control device and control method for rolls - Google Patents

Abstract

It is possible to control the width direction of the traveling position of the roll with good controllability based on the pattern.

The end of the width direction that is orthogonal to the traveling direction of the roll (1), that is, the end of the roll (1E), and the pattern (1) that is repeatedly printed on the roll (1) along the traveling direction The end of the width direction of 1A), that is, the end of the pattern (1A1), are respectively detected at the first position in the traveling direction of the roll; take in the roll that represents the detected end (1E) of the roll The cylinder end detection signal (G1) and the pattern end detection signal (G2) indicating the detected end of the pattern (1A1) are generated to compare the end of the pattern (1A1) with the preset reference of the end of the pattern The position (P1) is relatively aligned with the control signal; with this control signal, the roll is moved in the width direction.

Description

Snaking control device and control method for rolls

The present invention relates to a web snaking control device and a control method for controlling the snaking of a web printed with a design based on a design reference.

Fig. 5 (a) and (b) show a conventional web meandering control device applied to a web processing device. The web 1 is wound back by the winding reel 2, guided by the deflection roller 3A and the guide roller 3B to travel in the arrow X direction, and is subjected to a predetermined processing in the processing device 4. Among them, the roll running mechanism that drives the roll 1 to travel is not shown.

An example of the plane of the roll 1 is shown in FIG. 6. The web 1 is printed with a plurality of rows (in the example of FIG. 6, in the Y direction orthogonal to the arrow X direction, that is, 5 rows in the width direction) the same pattern 1A, for example. Among them, the adjacent rows are spaced equal to each other, and the pattern 1A of each row is repeatedly printed at a certain interval along the traveling direction indicated by the arrow X of the roll 1.

There are various types of the processing device 4, and as an example, a longitudinal cutting device that cuts the roll 1 into plural numbers along the arrow X direction is cited. Rolls arriving at processing device 4 For example, the interval of the pattern 1A in each row is cut for each row to form a plurality of cut pieces 1B.

The processing device 4 cuts the web 1 so that the widths of the cut pieces 1B in the Y direction of the arrow are equal to each other, and the pattern 1A is located at the center of each cut piece 1B in the width direction. The left and right blank parts 1C and 1D in the roll 1 are removed by cutting by the processing device 4. As another example of the processing device 4, a punching processing device in which only the respective patterns 1A are punched and separated from the roll 1 is cited. Of course, there are various types of processing devices 4, not limited to these two examples.

However, if the processing device 4 is a longitudinal cutting device, if the traveling position of the roll 1 is deviated in the arrow Y direction, that is, the width direction, it will occur in the pattern 1A that deviates from the center of the cut piece 1B, or the pattern 1A is cut off. In addition, if the processing device 4 is the above-mentioned punching processing device, if the traveling position of the roll 1 is deviated in the width direction, the pattern 1A cannot be punched correctly along its outer periphery, which will cause There is a problem that the pattern 1A is cut off.

Therefore, the traveling position of the roll 1 in the width direction is controlled by the roll meandering control device. The web meandering control device is shown in FIG. 5, and is provided with: a web end sensor 5 that detects the traveling position of the web 1 in the width direction; and moves the rewinding reel 2 in the arrow Y direction The actuator 6; and the actuator control unit 7 that controls the actuator 6 in accordance with the detection result obtained by the roll end sensor 5.

The web end sensor 5 sets the arrow Y of the web 1 The position of the end of the direction (hereinafter referred to as "the end of the roll") 1E, for example, an optically detected sensor, is arranged near the winding shaft 2, that is, between the deflection roller 3A and the guide roller 3B between.

The reference position of the end of the web, which is the reference position of the end 1E of the web, is preset in the actuator control unit 7, and the web end detection signal is detected by the end sensor 5 of the web. A control signal is transmitted to the actuator 6 so that the difference from the reference position of the end of the roll is within a predetermined threshold.

The actuator 6 operates in accordance with the control signal received by the actuator control unit 7, thereby causing the rewinding shaft 2 to move in the arrow +Y direction or -Y direction, so that the roll end 1E and the roll Correct the position of the roll 1 in the Y direction of the arrow so that the reference position of the end of the tube matches.

As shown above, the conventional web meandering control device monitors the end 1E of the web, and keeps the position of the arrow in the Y direction of the web 1 constant, so that it does not occur when the processing device 4 is used. The above problems during processing.

However, only performing a control system that maintains the end portion 1E of the roll material at a constant level causes the following problems. That is, as shown in FIG. 7, at different positions in the X direction of the arrow of the roll 1, if the end of the roll 1E to the end of the arrow Y of the pattern 1A (hereinafter referred to as the "pattern end" When the distance L0 of 1A1 is different and it is printed, as described above, control is performed only in such a way that the end 1E of the roll and the reference position of the end of the roll coincide. For example, if the processing device 4 is shown in FIG. 6 In the vertical cutting device described, pattern 1A may deviate from the center of cutting piece 1B, or pattern 1A may It is cut and the product becomes a problem of defectiveness. Similarly, even in the case where the processing device 4 is the above-mentioned punching processing device, the pattern 1A cannot be punched accurately along its outer periphery, and as a result of the pattern 1A being cut, the problem of product defects may occur.

Therefore, as shown in Fig. 8, a method has been proposed to print the pattern 1A on the web 1 while printing the line 1F near the end that does not affect the pattern 1A. When the web 1 is sent to When processing the device 4, by replacing the line sensor 8 arranged on the roll end sensor 5, the line 1F is detected, and the line 1F is consistent with the pre-set line reference position. The actuator control unit 7 and the actuator 6 control the deviation of the arrow Y direction of the roll 1 to correct the deviation of the pattern 1A.

However, in this method, when printing the pattern 1A on the web 1, a certain printing line 1F is required, so there is a problem that the printing ink is consumed excessively.

In order to solve the above-mentioned problem, a method for controlling the walking of the web 1 to control the walking of the web 1 in a way that the pattern end 1A1 of the web 1 is consistent with the preset reference position of the pattern end ( Patent Document 1).

The web meandering control device is in the web meandering control device illustrated in FIG. 5, on the downstream side of the web end sensor 5, in the vicinity of the guide roller 3B directly in front of the processing device 4 , As shown in FIG. 9, a pattern detection camera 9 that photographs the pattern 1A is additionally arranged. The control system at this time is performed as follows.

The pattern 1A captured by the pattern detection camera 9 For the image, the deviation amount of the pattern end 1A1 from the reference position of the pattern end is detected and used as a correction signal. Next, the actuator control unit 7 controls the actuator so that the deviation of the roll end 1E from the roll end reference position detected by the roll end sensor 5 becomes zero. At 6 o'clock, the reference position of the end of the roll is corrected by the above 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 roll end reference position is corrected to the -Y direction by the correction signal. In addition, when the deviation of the pattern end 1A1 from the pattern reference position is a deviation in the -Y direction, the roll end reference position is corrected to the +Y direction by the correction signal. The control of correcting the reference position of the end of the roll is performed as described above, whereby the traveling of the roll 1 is controlled so that the pattern end 1A1 becomes the reference position of the pattern.

[Prior technical literature] 〔Patent Literature〕

[Patent Document 1] JP 2009-122973 A

However, in the web meandering control device illustrated in FIG. 9, the web end sensor 5 is arranged in the vicinity of the rewinding reel 2, directly in front of the processing device 4 on the downstream side away from the location. It is equipped with a pattern detection camera 9, so the response delay caused by the feedback control of the pattern end detection signal of the image captured by the pattern detection camera 9 is more than that caused by the roll end sensor 5 Detected end of roll The response delay caused by the feedback control of the detection signal is larger, and it is prone to swing, and there is a problem of unstable control.

Therefore, it is considered that the gain of the pattern end detection signal is smaller than the gain of the reel end detection signal, and the filter is applied to the pattern end detection signal. However, as shown above, it becomes impossible to effectively use the pattern detection camera 9 The detected signal at the end of the imaged pattern.

The object of the present invention is to provide a web meandering control device and method for controlling the width direction of the traveling position of the web with good controllability based on a pattern.

In order to solve the above-mentioned problems, the roll snaking control device of the invention of claim 1 is characterized by having: roll end detection means, which is a width direction perpendicular to the traveling direction of the roll The end, that is, the end of the roll, is detected at the first position in the travel direction of the roll; the pattern end detection means is to repeatedly print the pattern on the roll along the travel direction The end of the width direction, that is, the end of the pattern, is detected at the first position; the control signal generation means takes in the end of the roll detected by the end of the roll detection means Signal and the pattern end detection signal detected by the aforementioned pattern end detection means to generate a control signal for aligning the aforementioned pattern end with a preset reference position of the pattern end; and an actuator, which is Using the control signal output by the control signal generating means, the web is moved in the width direction.

The invention of claim 2 is that in the roll meandering control device described in claim 1, the roll end detecting means and the pattern end detecting means are constituted by one imaging means, and the imaging means is in the field of view Detect the end of the roll and the end of the pattern.

The invention of claim 3 is in the roll meandering control device described in claim 2, wherein the imaging means is a two-dimensional imaging means arranged at the first position or along the width direction of the roll The one-dimensional imaging means arranged at the aforementioned first position.

The invention of claim 4 is that in the web meandering control device described in claim 1, 2 or 3, the control signal generating means is selected based on the comparison result of the pattern end detection signal and the reference position of the pattern end Based on the comparison result of the selected reference position of the end of the roll and the detection signal of the end of the roll, the control signal is generated according to the reference position of the end of the roll.

The method for controlling the meandering of a roll of the invention of claim 5 is characterized in that the end of the width direction orthogonal to the traveling direction of the roll, that is, the end of the roll, is repeated along the aforementioned traveling direction. The end of the pattern printed on the roll in the width direction, that is, the end of the pattern, is detected at the first position in the traveling direction of the roll; taking in indicates the detected roll The end of the roll object detection signal and the pattern end detection signal representing the detected end of the pattern are generated to align the end of the pattern with the preset reference position of the pattern end ; With the control signal, the roll is moved toward the width direction.

The invention of claim 6 relates to the method for controlling the meandering of the roll described in claim 5, in which one imaging means detects the end of the roll and the end of the pattern.

The invention of claim 7 is that in the method for controlling the meandering of the web described in claim 5 or 6, the reference position of the end of the web is selected according to the comparison result of the aforementioned pattern end detection signal and the reference position of the aforementioned pattern end, The control signal is generated according to the comparison result of the selected reference position of the end of the roll and the detection signal of the end of the roll.

With the present invention, since the end of the roll and the end of the pattern are detected at the first position in the traveling direction of the roll, the detection signal of the end of the roll and the end of the pattern detection signal can be processed with the same gain, which can prevent delays. The occurrence of swings caused by the difference is relatively good.

1‧‧‧Reel

1A‧‧‧Pattern

1A1‧‧‧Pattern end

1B‧‧‧Cut off piece

1C、1D‧‧‧Blank part

1E‧‧‧End of roll

1F‧‧‧line

2‧‧‧Rewind the scroll

3A‧‧‧Deflection roller

3B‧‧‧Guide roller

4‧‧‧Processing device

5‧‧‧Reel end sensor

6‧‧‧Actuator

7‧‧‧Actuator Control

8‧‧‧Line sensor

9‧‧‧Pattern detection camera

10‧‧‧Camera Device

10A‧‧‧View

11‧‧‧Image Processing Department

12‧‧‧Actuator Control

12a‧‧‧Comparison Part 1

12b‧‧‧The end of the roll reference position storage part

12c‧‧‧Comparison part 2

12d‧‧‧Pattern end reference position storage

G1‧‧‧Reel end detection signal

G2‧‧‧Pattern end detection signal

Fig. 1 (a) is a plan view of a web meandering control device according to an embodiment of the present invention, and (b) is a side view.

FIG. 2 is an explanatory diagram of a part of the web imaged by the imaging device of the web meandering control device of this embodiment.

Fig. 3 is an explanatory diagram of the actuator control unit of the web meandering control device of the present embodiment.

Figure 4 is based on the pattern base of the coil meandering control device of this embodiment An explanatory diagram for the control of the standard.

Figure 5 (a) is a plan view of a conventional roll meandering control device, and (b) is a side view.

Fig. 6 is an explanatory diagram of a web printed with a pattern when the conventional web meandering control device travels.

Fig. 7 is an explanatory diagram showing the deviation in the width direction of the pattern printed in the traveling direction of the web.

Fig. 8 is an explanatory diagram of an example of a line printed together with a pattern in the traveling direction of the web.

Fig. 9 is an explanatory diagram of a conventional web meandering control device that detects the end of the web and the end of the pattern and controls the walking of the web based on the pattern.

Hereinafter, a web meandering control device according to an embodiment of the present invention will be described. The same symbols as those described in FIGS. 5 to 9 are marked with the same symbols, and repeated descriptions are omitted. In this embodiment, as shown in FIG. 1, the roll end sensor 5 originally arranged between the deflection roller 3A and the guide roller 3B is removed, and the CCD camera is fixedly arranged above the deflection roller 3A. Into the camera device 10. However, the illustration of a light source illuminating an area captured by the imaging device 10 is omitted.

With the imaging device 10, the roll end 1E and the pattern end 1A1 are captured with one field of view 10A as shown in FIG. 2 for imaging, and the captured image is image-processed in the image processing section 11. This generates a web end detection signal indicating the position of the web end 1E G1, and a pattern end detection signal G2 indicating the position of the pattern end 1A1.

As shown above, in this embodiment, the end 1E of the web and the end 1A1 of the pattern are detected at the same position of the web 1 in the traveling direction indicated by the arrow X, and the detection signals G1 and G2 are sent to The actuator control unit 12.

Among them, as shown in FIG. 2, the end 1E of the roll is the end on the right when viewed from above the traveling direction of the roll 1 indicated by the arrow X. In addition, the pattern end 1A1 is the end on the right when viewed from above the traveling direction of the pattern 1A closest to the end 1E of the roll 1.

The actuator control unit 12 is configured as shown in FIG. 3. 12a is the first comparison part, 12b is the roll end reference position storage part that stores the data of the end reference position of the roll, 12c is the second comparison part, and 12d is the end of the pattern that stores more than 1 or 2 The reference position storage part of the pattern end of the reference position data.

In the actuator control section 12, the pattern end detection signal G2 created in the image processing section 11 and the pattern end reference position storage section 12d are processed in accordance with the processing of the web 1 performed by the processing device 4. The reference position of the end of the pattern whose position has been read is compared in the second comparison unit 12c, and a selection signal is created based on the obtained difference. With this selection signal, the reference position of the end of the web is read in the reference position storage portion 12b of the end of the web. Next, the roll end detection signal G1 made in the image processing unit 11 and the roll end reference position read out by the roll end reference position storage unit 12b are sent to the first comparison unit 12a Compare In comparison, a control signal according to the obtained difference is generated and output to the actuator 6.

4, the control operation will be described. As shown in Fig. 4(a), if the pattern end 1A1 deviates by L1 from the pattern end reference position P1 read from the pattern end reference position storage section 12d in the +Y direction, the second comparison section 12c generates The magnitude of the deviation L1 and the selection signal of the deviation direction. As a result, the roll end reference position read by the roll end reference position storage unit 12b becomes the roll end reference position Q1 shifted by L1 in the -Y direction. The actuator control unit 12 generates a control signal according to the comparison result of the roll end detection signal G1 and the roll end reference position Q1, and transmits it to the actuator 6. In the actuator 6, the winding shaft 2 is moved in the arrow-Y direction so that the end 1E of the roll material moves in the arrow-Y direction.

Even if the current pattern 1A is not in the field of view 10A of the imaging device 10, the control system of the end 1E of the web remains as it is, and continues until the next pattern 1A is captured by the imaging device 10, and the next pattern 1A is The pattern end 1A1 is detected. Next, if the pattern end 1A1 of the next pattern 1A is detected, the second comparison unit 12c updates the selection signal, and performs the same control with the updated selection signal.

As a result of repeated control as shown above, as shown on the right side of Fig. 4(a), the end 1A1 of the pattern 1A coincides with the pattern reference position P1.

Wherein, if the pattern end 1A1 deviates from the pattern end reference position P1 read out from the pattern end reference position storage unit 12d by L2 in the -Y direction, as shown in FIG. 4(b), and the above-mentioned FIG. 4(a) The control is opposite Therefore, control is performed to move the rewinding shaft 2 in the arrow +Y direction. As shown on the right side of FIG. 4(b), the end 1A1 of the pattern 1A coincides with the pattern reference position P1.

With the control shown above, the actuator 6 repeatedly moves the reel 2 in the arrow -Y direction or +Y direction, so that even at each position in the arrow X direction, the end of the pattern The distance L0 between 1A1 and the roll end 1E is different as illustrated in FIG. 7, and the pattern end 1A1 fed to the processing device 4 coincides with the pattern end reference position P1. The reference position P1 of the pattern end is pre-selected according to the processing position of the processing device 4, whereby the meandering control of the web 1 is controlled at the reference position P1 of the pattern end, and the processing device 4 can be processed correctly.

In this embodiment, the pattern end 1A1 and the web end 1E are detected at the same running position (the position of the deflection roller 3A) in the direction of arrow X of the web 1, so the resulting pattern end The detection signal G2 and the web end detection signal G1 are simultaneously taken into the actuator control unit 12. Therefore, the two signals G1 and G2 can be processed with the same gain, and there is no need to adjust the gain of the pattern end detection signal G2 or apply a filter. The pattern end detection signal G2 can be effectively used, and the controllability is relatively good.

Among them, in this embodiment, a two-dimensional imaging device 10 such as a CCD camera is used, but a one-dimensional imaging device such as a line sensor may also be used. At this time, if the one-dimensional imaging device is arranged in the width direction of the roll 1, the roll end 1E and the pattern end 1A1 can be detected simultaneously.

In addition, in this embodiment, one imaging device 10 is used to detect the roll end 1E and the pattern end 1A1 at the same position in the traveling method of the roll 1, but the detection roll can also be formed separately The roll end detection means of the article end 1E and the pattern end detection means of the detection pattern end 1A1 are arranged at the same position in the traveling direction of the roll.

In addition, in this embodiment, the roll object end detection signal G1 and the pattern end detection signal G2 are generated in the image processing unit 11, and the signals G1 and G2 are taken into the actuator control unit 12 to perform calculations to generate The control signal for controlling the actuator 6 is not limited to this. For example, in the image processing unit 11, the roll object end detection signal G1 and the pattern end detection signal G2 can also be detected, and the signals G1 and G2 can be calculated by the same calculation as the description in FIG. 3, A control signal is generated, and the control signal is sent to the actuator control unit 12, and the actuator 6 is controlled by the actuator control unit 12. At this time, the control signal generated by the image processing device 11 is amplified by the actuator control unit 12. As shown above, the control signal for controlling the actuator 6 can also be generated in any one of the image processing unit 11 and the actuator control unit 12, and the image processing unit 11 and the actuator control unit 12 can be combined It is called the control signal generation method.

In addition, in this embodiment, it is explained that the snaking control is performed on the basis of the pattern printed on the web 1 repeatedly at a certain interval in the walking direction indicated by the arrow X. However, the snaking control of this embodiment is used. The patterns used are not limited to simple patterns that are subsequently cut out by cutting. For example, the cutting mark indicating the cutting position of the simple pattern, the centering mark or the registration mark for the hunting control during printing, etc. It is printed repeatedly at a certain pitch and is finally removed. However, in the snaking control, these can be processed in the same manner as the pattern described above, so they are also included in the pattern.

1‧‧‧Reel

1A‧‧‧Pattern

1A1‧‧‧Pattern end

1E‧‧‧End of roll

3A‧‧‧Deflection roller

10A‧‧‧View

Claims (7)

A web meandering control device, characterized in that it is provided with: web end detection means, which sets the end in the width direction orthogonal to the traveling direction of the web, that is, the end of the web , The detection is performed at the first position of the roll in the traveling direction; the pattern end detection means is to repeatedly print the pattern of the roll in the width direction along the traveling direction. That is, the end of the pattern is detected at the first position; the control signal generation means takes in the end detection signal of the roll detected by the end detection means of the roll, and the end of the pattern is detected The pattern end detection signal detected by the means generates a control signal for aligning the aforementioned pattern end with a preset reference position of the pattern end; and an actuator, which is output by the control signal generating means The aforementioned control signal causes the aforementioned roll to move in the aforementioned width direction. For example, the roll meandering control device of the first item of the scope of patent application, in which the roll end detection means and the pattern end detection means are constituted by one imaging means, and the roll is detected in the field of view of the imaging means Object end and the aforementioned pattern end. For example, the roll meandering control device of the second item of the scope of patent application, wherein the imaging means is a two-dimensional imaging means arranged at the first position, or is arranged on the roll along the width direction of the roll One-dimensional imaging means at the first position. For example, the winding control device of item 1, item 2, or item 3 of the scope of patent application, wherein the control signal generating means is selected according to the comparison result of the detection signal of the end of the pattern and the reference position of the end of the pattern Based on the comparison result of the selected reference position of the end of the roll and the detection signal of the end of the roll, the control signal is generated according to the reference position of the end of the roll. A method for controlling the meandering of a web, which is to repeatedly print the end of the web in the width direction orthogonal to the traveling direction of the web, that is, the end of the web, and the web along the traveling direction. The end of the pattern in the width direction, that is, the end of the pattern, are respectively detected at the first position of the traveling direction of the roll; take in the roll that represents the detected end of the roll The end detection signal, and the pattern end detection signal representing the detected end of the pattern, generate a control signal for aligning the pattern end with the preset reference position of the pattern end; by means of the control signal , Move the roll in the width direction. For example, the winding control method of item 5 of the scope of patent application, in which one camera is used to detect the end of the roll and the end of the pattern. For example, the winding control method of item 5 or 6 of the scope of patent application, in which the reference position of the end of the web is selected according to the comparison result of the detection signal of the aforementioned pattern end and the reference position of the aforementioned pattern end. The comparison result of the selected reference position of the end of the roll and the detection signal of the end of the roll generates the aforementioned control signal.

Images