JP2022124323A - Transport method of web, manufacturing method of web, and transport device of web - Google Patents

Abstract

To provide a transport method of web, a manufacturing method of web, and a transport device of web, where the physical property of transported web can be highly accurately detected or transported web can be processed while conducting web transportation including reeling out of a roller and winding up onto the roller.SOLUTION: The web transport method includes: a detection step where a predetermined physical property of transport web W is detected by a sensor part 12 after the transport web W is reeled out of a roller 10 or before the transport web W is wound up onto the roller 10; or a processing step where a predetermined process is conducted on the transport web W; a positional information acquisition step where the inclination of the transport web W in the side view is detected without contacting the transport web W, and an inclination variation θ is acquired as a positional variation of the transport web W; and a position control step where the position of the sensor part 12 or the processing part is controlled based on the positional variance obtained in the positional information acquisition step.SELECTED DRAWING: Figure 1

Description

The present invention relates to a web conveying method, a web manufacturing method, and a web conveying apparatus.

In the process of manufacturing long media such as various films, metal foils, papers, and cloth called webs, the web is delivered from a delivery roll and wound on a take-up roll. It is required to be able to maintain high-precision quality without any trouble while transporting the product.

In the web manufacturing process, sensors are arranged on the transport line in order to control the quality of the web being transported (conveyed web). For example, a sensor for measuring the charge amount of the conveyed web and a sensor for detecting foreign matter, defects, etc. are arranged on the conveying line to grasp the physical properties and quality of the sensor web.

Further, in the web manufacturing process, various processing units are arranged on the transport line in order to perform desired processing on the transported web. For example, a slitting device or the like for slitting the conveying web is arranged on the conveying line to perform slitting for cutting the peripheral edge of the conveying web.

In this way, by providing sensors and processing units on the transport line, the physical properties of the transport web can be detected and the transport web can be processed as desired.

For example, Patent Document 1 relates to an electrostatic potential measuring device for measuring the potential of static electricity generated in a sheet-like material, which is provided near a sheet roll formed by winding a long sheet-like material into a roll, A device for measuring the potential of static electricity generated on a sheet-like material, which is detachable from a measuring device for measuring the potential of static electricity and a machine frame that supports the sheet roll, and is attached to the surface of the sheet roll from above. a measuring instrument holding means that moves up and down in accordance with changes in the outer diameter of the sheet roll while holding the measuring instrument at a position separated from the surface by a predetermined distance in rolling contact so as to be movable along the axis of the sheet roll. An electrostatic potential measuring device is disclosed.

JP-A-05-170369

However, when the web is conveyed by feeding the web from the roller or winding on the roller as described above, by providing a sensor or processing unit on the conveying line, the physical properties of the conveyed web can be detected and desired properties of the conveyed web can be obtained. Although processing is applied, there is a problem that the accuracy is not sufficient.

For example, the electrostatic potential measuring device described in Patent Document 1 measures the potential of static electricity generated on a web. , it does not accurately sense the electrostatic potential of the conveying web (eg, one layer of conveying web, not the wound web). Furthermore, this electrostatic potential measuring device is equipped with measuring device holding means that moves up and down in accordance with changes in the outer diameter of the sheet roll. There are also issues that affect it.

In the case of detecting the physical properties of the conveyed web or applying desired processing to the conveyed web, in conveying the web that accompanies unwinding from rollers and winding onto rollers, the roll diameter increases as the conveying progresses. It changes to a smaller diameter or from a smaller diameter to a larger diameter. Therefore, the position of the conveying web gradually changes. This change in position becomes noticeable in the section of the transport line between the supply roll or the take-up roll and the guide rollers arranged in the vicinity thereof.

However, in the conventional web transport technology, there are technologies that can detect the physical properties of the transport web with high accuracy, and techniques that can process the transport web with high accuracy after sufficiently considering the position change of the transport web as described above. The fact is that the technology that can be applied has not yet been developed.

The present invention has been made in view of such circumstances, and is capable of detecting the physical properties of a conveyed web with a high degree of accuracy when conveying a web that accompanies unwinding from a roller or winding onto a roller. Alternatively, the main object is to provide a web transporting method, a web manufacturing method, and a web transporting apparatus capable of processing the transported web.

As a result of intensive studies to achieve the above-described object, the inventors of the present invention have found a method for conveying a web that is unwound from a roller or wound on a roller, comprising: For a certain transport web, a detection step of detecting predetermined physical properties of the transport web with a sensor unit, or a processing step of applying a predetermined processing to the transport web by a processing unit, and a side view without contacting the transport web A position information acquisition step of detecting the inclination of the conveying web and acquiring the amount of change in the inclination as the amount of change in the position of the conveying web; The present invention has been completed based on the knowledge that a web conveying method includes a position control step of controlling the .

That is, the present invention is as follows.

(1)
A method for conveying a web that is unwound from a roller or wound on a roller, wherein a predetermined physical property of the conveyed web after being unwound from the roller or before being wound on the roller is detected by a sensor unit. a detection step of detecting, or a processing step of subjecting the conveying web to a predetermined processing by a processing unit; and a position control step of controlling the position of the sensor section or the processing section based on the positional change amount obtained in the position information obtaining step. and a method of conveying a web.
(2)
In the position information acquisition step, at least two focal length measuring units having lenses are arranged above or below a conveying line of the web, and each of the focal length measuring units for the conveying web measures the position of the conveying web. The method according to (1), wherein a focal length to the surface is obtained, the tilt of the conveying web is detected from the obtained focal length, and the amount of change in the tilt is obtained as the amount of positional change of the conveying web. web conveying method.
(3)
In the position information acquiring step, at least two position measuring units each having an irradiation unit capable of emitting energy rays and a light receiving unit capable of receiving the energy rays are arranged above or below the web transport line. and irradiating the conveying web with the energy beam from the irradiating unit of each of the position measuring units toward the surface of the conveying web, and receiving the reflected wave of the energy beam reflected from the surface. acquire the distance to the conveying web by receiving light by a unit, detect the inclination of the web from the acquired distance, and acquire the amount of change in the inclination as the amount of positional change of the web, ( 1) or a method for conveying a web according to (2).
(4)
In the position information acquisition step, at least one imaging unit having a lens is disposed above or below the web transport line, and the imaging unit detects a predetermined location on the surface of the transport web. (1 ) to (3).
(5)
In the position information acquisition step, at least one side imaging unit is arranged on the side of the web transport line, and the side imaging unit captures an image of the transport web from the side surface of the transport web. The web conveying method according to any one of (1) to (4), wherein the tilt of the web is detected, and the amount of change in the tilt is acquired as the amount of positional change of the web.
(6)
The position information acquiring step acquires the positional change amount of the transport web in real time, and the position control step determines the position of the sensor unit or the processing unit based on the positional change amount acquired in real time. The web transport method according to any one of (1) to (5), which is controlled in real time.
(7)
The detection step includes a step of measuring the charge amount of the conveying web by the sensor unit, and detecting the presence or absence of foreign matter by the sensor unit that picks up an image of the surface of the conveying web and detects adhesion of foreign matter to the surface. imaging the surface of the conveying web and detecting the presence or absence of defects by the sensor unit for detecting defects on the surface; (1) to (6), wherein at least one selected from the group consisting of the step of measuring the amount and the step of detecting the uneven shape of the surface of the conveying web by the sensor unit that detects the uneven shape of the surface of the conveying web. Any one of the web conveying methods.
(8)
The processing step includes a step of performing slit processing on the transport web by the processing unit that cuts the side edge of the transport web, and a step of performing laser processing on the transport web by the processing unit that irradiates the transport web with a laser. removing foreign matter from the surface of the conveying web by the processing unit that injects air onto the conveying web; and sucking the foreign matter from the surface of the conveying web by the processing unit that sucks air from the surface of the conveying web. correcting the slack and/or wrinkles of the transport web by the processing unit equipped with a guide roll mechanism for controlling meandering of the transport web; and performing discharge treatment on the surface of the transport web. The web transport method according to any one of (1) to (7), wherein the processing unit performs at least one selected from the group consisting of modifying the surface of the transport web.
(9)
A feeding step of feeding from the roller, or a winding step of being wound around the roller, and a conveying step of conveying the web by the web conveying method according to any one of (1) to (8). A method of manufacturing a web, comprising:
(10)
A web conveying device that is unwound from a roller or wound on a roller, wherein a conveying unit for conveying the web, and a conveying web after being unwound from the roller or before being wound on the roller, the conveying With respect to a sensor unit that detects predetermined physical properties of the web, or a processing unit that performs predetermined processing on the conveying web, and the conveying web after being drawn out from the roller or before being wound around the roller, the above a position information acquisition unit that detects an inclination of the transport web in a side view without contacting the transport web and acquires an amount of change in the inclination as an amount of positional change of the transport web; and a position control section that controls the position of the sensor section or the processing section based on the positional change amount obtained by the web transfer apparatus.

According to the present invention, it is possible to detect the physical properties of the conveyed web with high accuracy, or to process the conveyed web, when the web is conveyed by unreeling from the roller or winding on the roller. It is possible to provide a web conveying method, a web manufacturing method, and a web conveying apparatus that can

FIG. 1 is a side view for explaining the transport method according to the first embodiment. FIG. 2 is a top view for explaining the transport method according to the first embodiment. FIG. 3 is a side view for explaining acquisition of the tilt change amount in the first embodiment. FIG. 4 is a side view for explaining a conveying method according to the second embodiment. FIG. 5 is a schematic diagram for explaining acquisition of the amount of change in tilt based on the captured image of the camera in the second embodiment. FIG. 6 is a top view for explaining the transport method according to the third embodiment. FIG. 7 is a side view for explaining a conveying method according to the third embodiment. FIG. 8 is a graph plotting the measured distance to the simulated film and the measured value of the charge amount at that time in the feeding test. FIG. 9 is a graph showing the measurement results of the charge amount in the feeding test of the example.

EMBODIMENT OF THE INVENTION Hereinafter, the form (only henceforth "this embodiment") for implementing this invention is demonstrated in detail. The following embodiments are examples for explaining the present invention, and are not intended to limit the present invention to the following contents. The present invention can be appropriately modified and implemented within the scope of the gist thereof.

In the drawings, the same elements are denoted by the same reference numerals, and overlapping descriptions are omitted. In addition, unless otherwise specified, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of the drawings are not limited to the illustrated ratios.

In addition, in the present specification, the term "abbreviated" indicates the meaning of the term excluding the "abbreviation" within the scope of the technical common sense of a person skilled in the art, and the meaning itself excluding the "abbreviation" shall also include

<Method of Conveying Web>

A method for conveying a web according to the present embodiment is a method for conveying a web that is unwound from a roller or wound on a roller,
(1) A detection step of detecting predetermined physical properties of the conveying web after being drawn out from the roller or before winding onto the roller, or performing predetermined processing on the conveying web by the processing unit. a processing step to be applied;
(2) a position information acquisition step of detecting the inclination of the conveying web in a side view without contacting the conveying web and acquiring the amount of change in the inclination as the amount of change in the position of the conveying web;
(3) a position control step of controlling the position of the sensor unit or the processing unit based on the position change amount obtained in the position information obtaining step;
A method of conveying a web, comprising:

An example of measuring the charge amount as the detection step will be described below with reference to the drawings.

1 is a side view for explaining the conveying method according to the first embodiment, FIG. 2 is a top view for explaining the conveying method according to the first embodiment, and FIG. FIG. 10 is a side view for explaining acquisition of an amount of change in inclination in the embodiment;

The conveying method shown in FIG. 1 is a method of conveying a web W unwound from a roller 10 or wound around the roller 10, and the charge amount of the conveyed web (conveying web) W is measured. In this specification, the "web W" refers to the web wound around the roller 10 (the web of the roll bodies R1 and R2) and the conveying web (not wound around the roller 10 and conveyed on the conveying line). The term is sometimes used in the sense of including both

The conveying device 1 includes a roller 10 around which the web W is wound, and a guide roller 11 . A sensor unit 12 for measuring the charge amount of the conveyed web W is arranged above the conveying line (upper in FIG. 1), a first focal length measuring unit 13 on the roller 10 side, and a A second focal length measuring unit 14 and are arranged respectively. Unless otherwise specified, "above (the transfer line)" means above the transfer line when viewed from the side (for example, see FIG. 1). Unless otherwise specified, "below (of the transfer line)" means below the transfer line when viewed from the side (for example, see FIG. 1).

For example, when the web W is wound on the roller (in this case, it is also called a winding shaft) 10, the web W is transported from the guide roller 11 toward the roller 10 (see arrow F1). In this case, the roll diameter of the roll having the web W wound around the roller 10 gradually increases from a small diameter (see roll R1) to a large diameter (see roll R2). Along with this, the position of the transport web W also gradually moves from the bottom (see transport web W1) toward the top (see transport web W2).

On the other hand, when the web W is fed out from the roller (in this case, it may be called a feeding shaft) 10, the web W is conveyed from the roller 10 toward the guide roller 11 (see arrow F2). In this case, the roll diameter of the roll from which the web W is delivered gradually decreases from a large diameter (see roll R2) to a small diameter (see roll R1). Along with this, the position of the transport web W also gradually moves from above (see transport web W2) to below (see transport web W1).

Thus, the position of the conveying web W changes both when the web W is unwound from the roller 10 and when the web W is wound on the roller 10 . According to the present embodiment, the change in the position of the conveying web W can be accurately and easily grasped by acquiring the tilt change amount θ as the position change amount. In addition, since the tilt change amount θ can be acquired without contact, there is no adverse effect on the conveying line or the product web.

(Detection process)

In the conveying method according to the first embodiment, (1) a detection step of measuring the charge amount of the conveying web W after being let out from the roller 10 or before being wound around the roller 10 by the sensor unit 12 is performed. Here, as an example, the case where the charge amount is measured as the physical property of the web W is exemplified, but the sensor unit 12 may be configured to detect other physical properties. For example, the presence or absence of dust or defects, thickness, refractive index, surface waviness, and the like can be detected. The undulating state of the surface referred to here means occurrence of unintended fine irregularities on the surface, or the like. The physical properties detected by the sensor unit 12 need not be only one of these types, and two or more of these properties may be detected at the same time or at different times with a time difference.

The sensor unit 12 includes a charge amount measurement sensor 120 that measures the charge amount, a forward/backward moving unit 121 that moves the charge amount measurement sensor 120 back and forth (see arrow F3), and a rotation of the charge amount measurement sensor 120 in the conveying direction ( (see arrow F4)). As a result, the sensor section 12 can be moved in any direction up, down, left, or right with respect to the conveying web W. As shown in FIG.

The sensor unit 12 may be configured to measure the amount of charge at any one point on the conveying web W, or in the width direction of the conveying web W when viewed from the top (vertical direction of the paper surface of FIG. 1, see the vertical direction of FIG. 2). By making the sensor section 12 movable, the charge amount at an arbitrary width position of the conveyed web W may be measured.

When measuring the conveyed web W after being let out from the roller (feeding shaft) 10, it is preferable to perform the measurement by the sensor section 12 immediately after the feeding. More specifically, the conveyed web W is preferably measured by the sensor unit 12 at a location located 50 mm or more and 2000 mm or less from the central axis of the roller 10 on the transportation line, and more preferably 100 mm or more and 600 mm or less. It is more preferable that the position is located at 200 mm or more and 500 mm or less. Accordingly, it is possible to accurately measure and/or detect the properties of the web W, foreign matter, static electricity, etc. without being affected by the roller 10 or the guide roller 11 .

Similarly, when measuring the conveyed web W before winding onto the roller (winding shaft) 10, it is preferable to perform the measurement by the sensor unit 12 immediately before winding. More preferably, the conveyed web W is measured by the sensor unit 12 at a position located 50 mm or more and 2000 mm or less from the central axis of the roller 10 on the conveying line, and is 100 mm or more and 600 mm or less. It is more preferable that the position is located at a distance of 200 mm or more and 500 mm or less. Accordingly, it is possible to accurately measure and/or detect the properties of the web W, foreign matter, static electricity, etc., without being affected by the roller 10 or the guide roller 11 .

(Location information acquisition process)

Next, (2) the inclination of the conveying web W in a side view is detected without contacting the conveying web W after being let out from the roller 10 or before being wound around the roller 10, and the A position information obtaining step is performed to obtain the amount of change in inclination θ as the amount of change in the position of the conveying web W. As shown in FIG.

Here, the amount of change in inclination .theta. is the difference between the inclination of the web W1 at a specific time during transport and the inclination of the web W2 after a predetermined time has elapsed from this time.

As for the inclination of the transport web W1 at the above specific time point, for example, the inclination of the transport web W1 with respect to the horizontal direction in a side view of the transport line (see FIG. 1, for example) may be defined as the "inclination". Alternatively, in a side view of the transport line (see, for example, FIG. 1), a predetermined direction (for example, the inclination of the transport line at the start of transport) may be set as a reference line, and the inclination of the transport web W1 with respect to the reference line may be the "inclination". .

Similarly, the inclination of the conveying web W2 after the predetermined time has passed may be defined as the inclination of the conveying web W2 with respect to the horizontal direction when viewed from the side of the conveying line. Alternatively, a predetermined direction (e.g., the inclination of the transport line at the start of transport) in a side view of the transport line (see, for example, FIG. 1) may be set as a reference line, and the inclination of the transport web W2 with respect to the reference line may be the "inclination". .

In the present embodiment, it is only necessary to obtain the change amount θ of the inclination of the conveying web W when viewed from the side, and it is not necessary to calculate the specific inclination angle of the inclination at each time point. That is, in the present embodiment, it is only necessary to detect the tilt of the conveying web W in the side view described above, and the specific tilt angle does not necessarily need to be calculated.

In the position information acquisition step, a first focal length measuring unit 13 having a lens and a second focal length measuring unit 13 are provided above (see the upper part of FIG. 1) or below (see the lower part of FIG. 1) the conveying line of the conveying web W. At least two units 14 are arranged, and for the conveying web W, each of the first focal length measuring unit 13 and the second focal length measuring unit 14 acquires the focal length to the surface of the conveying web W, and the acquired focus It is preferable to detect the inclination of the conveying web W from the distance and obtain the change amount θ of the inclination as the position change amount of the conveying web W.

An example of a method of detecting the inclination of the conveyed web W from the focal length will be described with reference to FIG.

FIG. 3 exemplifies the case where the focal length measuring units 13 and 14 are provided at two locations, but the present embodiment is not limited to two locations, and may be arranged at three or more locations. By increasing the placement locations, the tilt change amount θ can be calculated with higher accuracy, so the position of the sensor section 12 can be controlled with higher accuracy.

For example, when winding the web W1 around the roller 10, the focal length a of the first focal length measuring unit 13 is measured with respect to the web W1 (see arrow F5 in FIG. 1), and the second focal length is measured with respect to the web W1. The focal length c of the measurement unit 14 is measured (see arrow F6 in FIG. 1). Then, after a predetermined time has passed and the web W2 is further wound up, the focal length b of the first focal length measuring unit 13 is measured with respect to the web W2 (see arrow F5 in FIG. 1), and the web W2 is In contrast, the focal length d of the second focal length measuring unit 14 is measured (see arrow F6 in FIG. 1). From the focal lengths a, b, c, and d obtained in this way, the arrangement distance between the first focal length measuring section 13 and the second focal length measuring section 14, and the like, the tilt change amount θ is obtained.

Alternatively, when the web W2 is fed out from the roller 10, the focal length b of the first focal length measuring unit 13 is measured with respect to the web W2 (see arrow F5 in FIG. 1), and the second focal length is measured with respect to the web W2. Measure the focal length d of the portion 14 (see arrow F6 in FIG. 1). Then, after a predetermined time has passed and the web W1 is further drawn out, the focal length a of the first focal length measuring unit 13 is measured with respect to the web W1 (see arrow F5 in FIG. 1), and the web W1 is to measure the focal length c of the second focal length measuring unit 14 (see arrow F6 in FIG. 1). From the focal lengths a, b, c, and d obtained in this way, the arrangement distance between the first focal length measuring section 13 and the second focal length measuring section 14, and the like, the tilt change amount θ is obtained.

Moreover, as shown in FIG. 2, the first focal length measuring unit 13 and the second focal length measuring unit 14 are preferably provided on the side edges (edge lines) of the transport line of the web W when viewed from the top of the transport line. . This allows the focal length to be measured more accurately.

Although not shown, according to the present embodiment, instead of the above-described first focal length measuring unit 13 and second focal length measuring unit 14, a first irradiation unit for irradiating the web W with an energy beam such as a laser beam is used. A configuration may be adopted in which a section and a second irradiation section are provided, the distances to the web W are obtained in each of the first irradiation section and the second irradiation section, and the tilt change amount θ is obtained from these distances. As with the focal length measurement units 13 and 14, two or more irradiation units can be provided on the transfer line.

In the case of acquiring the inclination change amount θ by the irradiating section, the position information acquiring step includes: an irradiating section capable of irradiating energy rays; a light receiving section capable of receiving energy rays; at least two position measuring units having energy beams (see arrows F5 and F6 in FIG. 1), and the reflected waves of the energy beams reflected from the surface are received by the light-receiving unit (opposite direction of arrow F5 and opposite direction of arrow F6 in FIG. 1). direction), obtain the distances a, b, c, and d to the conveying web W, and the obtained distances a, b, c, and d, and the first focal length measuring unit 13 and the second focal length measuring unit 14 It is preferable to calculate the change amount θ of the inclination of the web W from the arrangement distance between and the like, and acquire the change amount θ of the inclination as the position change amount of the web W.

(Position control process)

Then, the position control step of controlling the position of the sensor unit 12 is performed based on the position change amount obtained in the (3) position information obtaining step.

It is preferable to control the position of the sensor section 12 so that the distance between the sensor section 12 and the conveyed web W is kept constant. Position control of the sensor unit 12 can be performed by an actuator or the like. In the first embodiment, the position control of the sensor section 12 can be performed with high accuracy by the forward/backward movement section 121 and the rotational movement section 122 provided in the sensor section 12 . For example, an actuator or the like can be used to control the position of the conveyed web W so that a predetermined distance is always maintained according to the positional change of the conveyed web W during conveyance. By controlling the position in this way, the sensor section 12 can be moved following the position change of the transport web W during transport, so the physical properties of the transport web W can be detected with high accuracy.

Although the outer diameter (diameter) of the roller 10 is not particularly limited, it is preferably 3 inches or more and 10 inches or less. According to the present embodiment, even when the roller 10 having such an outer diameter is used, the distance between the sensor unit 12 and the conveying web W can be maintained at a constant distance. The physical properties of the web W can be detected.

Moreover, although the conveying speed of the conveying line is not particularly limited, it is preferably 1 m/min or more and 2000 m/min or less. When the conveying speed is relatively high, defects in the transported web W are likely to occur during transport. However, according to the present embodiment, defects in the web W can be detected with high accuracy, so defects in the manufacturing process can be prevented. can be effectively prevented.

Furthermore, the web W has a long, substantially rectangular shape, and is sometimes called a sheet, a film, or the like. The material of the web W is not particularly limited. engineering plastic films such as films), paper (glassine paper, high-quality paper, coated paper, cast-coated paper, etc.), cloth (non-woven fabric, etc.), and the like.

According to this embodiment, real-time monitoring is preferred. Specifically, the position information obtaining step obtains the positional change amount of the transport web W in real time, and the position control step adjusts the position of the sensor unit 12 based on the positional change amount of the transport web W obtained in real time. Real-time control is more preferable. When processing is performed by a processing unit, which will be described later, the position of the processing unit can be controlled in real time based on the amount of change in the position of the conveying web W acquired in real time, as in the case of using the sensor unit 12 . more preferred.

As described above, according to the present embodiment, since the sensor unit 12 can be moved to follow the change in the position of the conveying web W during conveyance, the amount of change in the position obtained in real time in the position information obtaining step can be Based on this, the position of the sensor unit 12 can be adjusted in real time in the position control process. As a result, the state of the conveyed web W can be continuously monitored by the sensor section 12 without stopping the conveying line.

By continuously monitoring in real time, sensing by the sensor unit 12 (for example, detection of temporal changes in various physical properties such as charge amount, rapid detection of foreign matter and defects, etc.) can be performed by driving the transfer line. can be done in real time. In particular, according to this embodiment, sensing can be performed without contacting the conveying web W, so real-time sensing can be performed with high accuracy without stopping the conveying line. Therefore, the manufacturing method also has the advantage of high yield and excellent manufacturing efficiency.

FIG. 4 is a side view for explaining a conveying method according to the second embodiment, and FIG. 5 is a schematic diagram for explaining acquisition of a tilt change amount based on an image captured by a camera in the second embodiment. be.

In the conveying method according to the second embodiment, the conveying web W is photographed from above, the distance is measured using the state of image blur of the photographed image, etc., and the change amount θ of the inclination of the conveying web W is detected. do.

The conveying device 2 includes a roller 10 around which the web W is wound and a guide roller 11 . A sensor unit 12 for measuring the charge amount of the conveyed web W is arranged above the conveying line (upper in FIG. 4), and an imaging unit 15 is arranged on the roller 10 side.

In the position information acquisition step in the second embodiment, at least one image capturing unit 15 having a lens is arranged above or below the transport line of the transport web W, and the image capturing unit 15 detects the surface of the transport web W. An image 150 is obtained by imaging a predetermined location above (see arrow F7 in FIG. 4), the inclination of the conveyed web W is detected from the image blur of the acquired image 150, and the change amount θ of this inclination is calculated. , can be obtained as the amount of change in the position of the conveying web W.

For example, when the web W1 is wound around the roller 10, a captured image 150 is obtained by capturing an image of a predetermined portion of the transported web W with the imaging unit 15 (see arrow F7 in FIG. 4 and FIG. 5). At that time, if the conveying web W1 is not horizontal with respect to the lens of the imaging unit 15 (that is, if the conveying web W is inclined with respect to the lens of the imaging unit 15), the captured image 150 will be blurred. occur. For example, in the case of FIG. 5, the right side area A1 of the captured image 150 is a clear image with little image blurring, while the left side area A2 has strong image blurring. In this manner, the distance between the right side area A1 and the imaging section 15 and the distance between the left side area A2 and the imaging section 15 are calculated using the intensity of the image blur, and the inclination of the conveyed web W at the time of imaging is calculated. can be detected.

Then, after a predetermined period of time has passed, the imaging unit 15 similarly images a predetermined portion of the conveying web W2 to obtain a captured image 150 (arrow F7 in FIG. 4, see FIG. 5). The inclination of the web W2 is detected.

In this way, the difference between the inclination of the transport web W1 at a specific time during transport and the inclination of the transport web W2 at a time after a predetermined time has passed from this time is calculated to obtain the amount of change in the inclination θ.

When the web W2 is let out from the roller 10, similarly to when the web W1 is wound around the roller 10, the inclinations of the webs W2 and W1 are obtained at least at two points in time, and the difference between the inclinations is obtained. Change amount θ can be obtained.

As a method of detecting the tilt using the image blur of the captured image 150, for example, the distance can be obtained by calculating the distance based on the brightness value, size, color, etc. of the image blur. Taking the luminance value as an example, the distance can be calculated based on a calibration curve obtained from the relationship between the luminance value of the image and the actual distance. For example, the actual distance between the camera and the edge of the web W, and the luminance value profile of the surface of the web W near the edge of the web W and the location away from the web W are grasped, and based on that, Create a calibration curve. In actual operation, the distance can be calculated by comparing the luminance value profile near the edge of the web W captured by the camera with the calibration curve created by the above method.

The imaging unit 15 is not particularly limited as long as it is a camera that has a lens and is capable of capturing an image. It is more preferable to use a stereo camera from the standpoints of being able to measure distances, having less errors due to interference between devices, and having less dependence on objects because pattern recognition using a database or the like is unnecessary. For example, an estimated distance may be obtained by deep learning based on image data collected in advance, and the tilt may be detected from this estimated distance. With such a method based on deep learning, for example, even when using a monocular camera, it is possible to acquire an estimated distance with the same degree of accuracy as with a compound camera. Alternatively, an algorithm for estimating distance may be constructed from image data collected in advance, and in actual use, by combining this algorithm, an estimated distance may be obtained with higher accuracy and tilt may be detected. .

For example, when capturing the captured image 150 in real time, the area of the image blur in the captured image 150 is narrow and the degree of image blur is small at first, but the degree of image blur increases as the conveyance progresses. It is also possible to acquire the above-described tilt change amount θ in real time by turning (or vice versa) or the like. For example, it is possible to use a phenomenon in which the focus is on at the start of the transport, but it becomes out of focus as the transport progresses (or vice versa).

According to the second embodiment, at least one imaging unit 15 should be installed on the transfer line. Although the installation position of the imaging unit 15 is not particularly limited, it is preferably installed in the vicinity of the sensor unit 12 in the transport direction from the viewpoint of detecting the position change of the sensor unit 12 with high accuracy.

FIG. 6 is a top view for explaining the conveying method according to the third embodiment, and FIG. 7 is a side view for explaining the conveying method according to the third embodiment.

In the conveying method according to the third embodiment, the conveying web W is imaged from the side, the tilt angle of the conveying web W when viewed from the side is acquired, and the change amount θ of the tilt of the conveying web W is detected.

The conveying device 3 includes a roller 10 around which the web W is wound and a guide roller 11 . A sensor unit 12 for measuring the charge amount of the conveying web W is arranged above the conveying line (upper side in FIG. 7), and a side image is taken on the side of the conveying line of the conveying web W (see FIG. 6). A portion 16 is arranged.

In the position information acquisition step in the third embodiment, at least one side imaging unit 16 is arranged on the side of the transport line of the web W, and the side imaging unit 16 captures the transport web W from the side surface of the transport web W. By capturing an image (see arrow F8), the tilt of the conveying web W can be detected, and the amount of change θ in this tilt can be obtained as the amount of positional change of the conveying web W. FIG.

Here, the amount of change in inclination .theta. is the difference between the inclination of the web W1 at a specific time during transport and the inclination of the web W2 after a predetermined time has elapsed from this time.

As for the inclination of the transport web W1 at the above specific time point, for example, the inclination of the transport web W1 with respect to the horizontal direction in the side view of the transport line (see FIG. 7, for example) may be defined as the "inclination". Alternatively, a predetermined direction in the side view of the transport line (for example, the inclination of the transport line at the start of transport) may be set as a reference line, and the inclination of the transport web W1 with respect to this reference line may be the "inclination". In either case, the inclination of the conveying web W1 is detected by obtaining a captured image (side image, see FIG. 7) by capturing an image of a predetermined portion of the conveying web W1 with the side imaging unit 16 (see FIG. 6). can be done.

Similarly, the inclination of the conveying web W2 after the predetermined time has passed may be defined as the inclination of the conveying web W2 with respect to the horizontal direction when viewed from the side of the conveying line. Alternatively, in a side view of the transport line (see, for example, FIG. 7), a predetermined direction (for example, the inclination of the transport line at the start of transport) is defined as a reference line, and the inclination of the transported web W2 with respect to this reference line is defined as the "inclination". good too. In either case, the inclination of the conveying web W2 is detected by obtaining a captured image (side image, see FIG. 7) by picking up an image of a predetermined portion of the conveying web W2 with the side imaging section 16 (see FIG. 6). can be done.

In the present embodiment, it is only necessary to obtain the change amount θ of the inclination of the conveying web W when viewed from the side, and it is not necessary to calculate the specific inclination angle of the inclination at each time point. That is, in the present embodiment, it is only necessary to detect the tilt of the conveying web W in the side view described above, and the specific tilt angle does not necessarily need to be calculated.

Similarly, when the web W1 is wound around the roller 10 and when the web W2 is unwound from the roller 10, the inclination of the conveyed web W is detected at least at two points in time, and the difference between them is calculated to determine the amount of change in inclination. θ can be obtained.

The side imaging unit 16 here can use a camera that can detect the inclination of the conveying web W, and is not particularly limited. For example, it is preferable to use a stereo camera or a monocular camera. It is more preferable to use a stereo camera from the viewpoint of passive distance measurement without emitting , less error due to interference between devices, and less dependence on objects because pattern recognition using a database or the like is unnecessary. For example, when detecting the tilt of the conveying web W based on the image captured by the side imaging unit 16, the tilt is detected based on the image 150 captured from above the imaging unit 15 as described in the second embodiment. can be done in compliance. For example, the tilt may be estimated by deep learning based on pre-collected image data, and the estimated tilt may be adopted. With such a method based on deep learning, for example, even when using a monocular camera, the tilt can be obtained with the same degree of accuracy as with a compound camera. Alternatively, an algorithm for the tilt may be constructed from image data collected in advance, and the tilt may be detected with higher accuracy in actual use by combining with this algorithm.

According to the third embodiment, at least one side imaging unit 16 should be installed on the side of the transport line. Although the installation position of the side imaging unit 16 is not particularly limited, it is preferably installed in the vicinity of the sensor unit 12 in the transport direction from the viewpoint of detecting the position change of the sensor unit 12 with high accuracy.

In the first to third embodiments described above, the case where the sensor unit 12 measures the charge amount of the web W as the detection process was exemplified, but the present invention is not limited to this. Various sensing steps, various processing steps, or both may be performed in this embodiment.

As a detection step that can be performed in this embodiment, for example,
(a) a step of measuring the charge amount of the conveyed web W by the sensor unit 12 described above;
(a) a step of capturing an image of the surface of the conveying web W with a camera or the like, and detecting the presence or absence of foreign matter by the sensor unit 12 capable of detecting adhesion of foreign matter to the surface of the conveying web W; A step of capturing an image of the surface of the conveying web W with a camera or the like, and detecting the presence or absence of defects by the sensor unit 12 capable of detecting defects on the surface of the conveying web W;
(d) a step of measuring the amount of coating by the sensor unit 12 for measuring the amount of coating on the surface of the conveying web W; the process of
It can be configured to perform at least one selected from the group consisting of.

A case where (a) the charge amount of the conveyed web W is measured by the sensor unit 12 as in the first embodiment will be described. The web W is charged as the web W is conveyed. If the web W is electrified, static electricity is generated on the web W, and dust or the like adheres to the surface of the web W, causing transport troubles. Therefore, in the production line, it is necessary to grasp the charge amount (for example, charge potential, charge amount, etc.) of the web W and perform appropriate static elimination processing. In this regard, according to the conveying method according to the present embodiment, the charge amount of the web W can be measured with high accuracy, so that the static elimination process and the like can be performed appropriately. In this case, by controlling the position of the sensor unit 12 so as to maintain a constant positional relationship with the web W based on the position change amount acquired in the position information acquisition step, A true charge amount can be measured with high accuracy.

(b) A case will be described in which the presence or absence of foreign matter is detected by the sensor unit 12 capable of detecting the adhesion of foreign matter to the surface of the conveying web W by taking an image of the surface of the conveying web W with a camera or the like. If foreign substances such as dust, dust, particles, insects, and human skins adhere to the conveying web W, the conveying web W will be contaminated, resulting in defective products. For example, such foreign matter is generated during web processing (slit residue, etc.), is generated by abrasion or deterioration of the rubber member of the rubber roller, or is generated by dust in the air adhering to the conveying web W. do. Therefore, in the production line, if foreign matter adheres to the conveying web W, it is necessary to perform appropriate dust removal processing. In this respect, according to the conveying method according to the present embodiment, the presence or absence of foreign matter adhering to the conveying web W can be detected with high accuracy, so dust removal processing using a web cleaner, a dust remover, or the like can be performed appropriately. A foreign object to be detected can be, for example, at least one selected from the group consisting of dust, dust, particles, insects, and human skin. In this case, by controlling the position of the sensor unit 12 so as to maintain a constant positional relationship with the web W based on the position change amount acquired in the position information acquisition step, Contaminants can always be detected under the same conditions.

(c) The case where the surface of the conveying web W is imaged by a camera or the like and the presence or absence of defects on the surface of the conveying web W is detected by the sensor unit 12 capable of detecting defects on the surface of the conveying web W will be described. Defects such as pinholes, folds, wrinkles, slack, slips, skews, scratches, abrasions, air bubbles, color unevenness, and the like occur while the transport web W is being transported, causing product defects. Therefore, in the production line, when a defect occurs in the conveyed web W, it is necessary to detect it promptly and control the conveying conditions such as the conveying speed. In this respect, according to the conveying method of the present embodiment, the occurrence of defects in the conveyed web W can be quickly detected with high accuracy, so the web can be handled appropriately. A defect to be detected can be, for example, at least one selected from the group consisting of pinholes, folds, wrinkles, sagging, slips, skews, scratches, abrasions, air bubbles, and color unevenness. In this case, by controlling the position of the sensor unit 12 so as to maintain a constant positional relationship with the web W based on the position change amount acquired in the position information acquisition step, Defects can always be detected under the same conditions.

(d) A case in which the coating amount is measured by the sensor unit 12 for measuring the coating amount on the surface of the conveying web W will be described. For example, when the conveying web W is a base material made of resin, it is coated with an ink-receiving layer provided for the purpose of printing, etc., and according to the conveying method according to the present embodiment, the coating amount can be obtained with high accuracy. can be measured. In this case, based on the positional change amount acquired in the position information acquisition step, the position of the sensor unit 12 is controlled so as to always detect foreign matter under the same conditions regardless of the winding diameter. It is possible to measure the coat amount of the coat layer under the same conditions. Furthermore, it may be possible to control the coating conditions such as the coating amount of the coating device (not shown) based on the information of the coating amount obtained in this way.

(e) A case where the sensor unit 12 for detecting the uneven shape of the surface of the conveying web W detects the uneven shape will be described. When applying processing to the web surface, having a certain amount of unevenness can lead to defects. According to the transport method according to the present embodiment, the uneven shape can be detected with high accuracy. In this case, by controlling the position of the sensor unit 12 so as to maintain a constant positional relationship with the web W based on the position change amount acquired in the position information acquisition step, Concavo-convex shape can always be detected under the same conditions.

Processing steps that can be performed in this embodiment include, for example,
(f) a step of slitting the conveying web W by a processing unit that cuts the side edges of the conveying web W;
(g) a step of subjecting the conveying web W to laser processing by a processing unit that irradiates the conveying web W with a laser;
(h) a step of removing foreign matter from the surface of the conveying web W by a processing unit that injects air onto the conveying web W;
(i) a step of sucking and removing foreign matter from the surface of the conveying web W by a processing unit that sucks air from the surface of the conveying web W;
(J) a step of correcting slack and/or wrinkles of the conveying web W by a processing unit equipped with a guide roll mechanism for controlling meandering of the conveying web W;
(k) a step of modifying the surface of the conveying web W by a processing unit that performs electrical discharge treatment on the surface of the conveying web W;
It can be configured to perform at least one selected from the group consisting of.

(f) A case where the conveying web W is slit by the processing unit that cuts the side edges of the conveying web W will be described. For example, a slitter device is provided on the transport line of the web W, and the side edges of the transport web W are cut along the transport direction to process the web W to have a desired width. When performing such slit processing, it is desired that the dimensional shape of the processed product is highly accurate. In this regard, according to the conveying method according to the present embodiment, the amount of positional change is obtained by the positional information obtaining step, whereby the amount of positional change associated with the conveying of the conveying web W can be accurately grasped. can be applied. For example, even minute shapes can be processed accurately.

(g) A case where the conveying web W is laser-processed by a processing unit that irradiates the conveying web W with a laser will be described. For example, desired processing can be applied to the conveying web W by providing a laser processing unit (not shown) having a light source capable of performing laser processing by irradiating a laser. In this regard, according to the conveying method according to the present embodiment, the amount of positional change is acquired by the positional information acquisition step, and the amount of positional change associated with the transport of the transport web W can be accurately grasped. can be applied. For example, even minute shapes can be processed accurately.

(h) A case where foreign matter is removed from the surface of the conveying web W by a processing unit that injects air onto the conveying web W will be described. By injecting air onto the conveying web W, it is possible to blow off the foreign matter adhering to the surface of the conveying web W. This allows foreign matter to be removed from the surface of the conveying web. At that time, for example, a nozzle or a blower capable of ejecting air is installed in the vicinity above or below the conveying web W. As shown in FIG. In this respect, according to the conveying method of the present embodiment, the amount of positional change is acquired by the positional information acquisition step, whereby the amount of positional change associated with the transport of the transport web W can be accurately grasped. Since the air can always be blown against the web W under the same conditions, foreign substances can be completely removed from the entire length of the web W to be conveyed.

(i) A case in which a processing unit that sucks air from the surface of the conveying web W sucks and removes foreign matter from the surface of the conveying web W will be described. By sucking the air on the surface of the conveying web W, the foreign matter adhering to the surface of the conveying web W can be sucked. This allows foreign matter to be removed from the surface of the conveying web. At that time, for example, a suction device is installed near the upper side or the lower side of the conveying web W. FIG. In this respect, according to the conveying method of the present embodiment, the amount of positional change is acquired by the positional information acquisition step, whereby the amount of positional change associated with the transport of the transport web W can be accurately grasped. Since foreign matter can always be sucked from the conveying web W under the same conditions, all foreign matter can be removed.

(J) A case of correcting the slack and/or wrinkles of the conveying web W by a processing unit having a guide roll mechanism for controlling meandering of the conveying web W will be described. By installing a guide roll mechanism for controlling meandering of the transport web W, slack and wrinkles of the transport web W caused by transport can be corrected. At that time, for example, a device for detecting the meandering state of the conveying web W is installed. In this respect, according to the conveying method of the present embodiment, the amount of positional change is acquired by the positional information acquisition step, whereby the amount of positional change associated with the transport of the transport web W can be accurately grasped. Since the meandering of the conveyed web W can always be detected under the same conditions without any changes, slackness and wrinkles can be accurately corrected without omission.

(K) The case where the surface of the transport web W is modified by the processing unit that performs the discharge treatment on the surface of the transport web W will be described. For example, when the wettability of the transport web W is to be modified, the surface of the transport web W can be subjected to a discharge treatment so that the surface of the transport web W can be improved in adhesion to other materials. can. At that time, for example, an electric discharge treatment device is installed. As a result, the amount of change in the position of the transport web W that accompanies transport can be accurately grasped, so that the transport web W can always be subjected to the discharge treatment under the same conditions regardless of the winding diameter. Examples of discharge treatment include corona discharge and plasma treatment.

<Web manufacturing method>

According to the present embodiment, the feeding process of feeding the web W from the roller 10, the winding process of winding the web W around the roller 10, and the conveying process of conveying the web W by the above-described conveying method of the web W. and, a method for manufacturing the web W can be provided.

In the manufacturing method according to the present embodiment, in addition to the above steps, known steps that are performed in manufacturing the web W may be further performed. According to the manufacturing method according to the present embodiment, the various advantages obtained in the method for conveying the web W described above can be reflected in the quality of the product web.

<Web Conveyor>

According to this embodiment, it is possible to provide a web W conveying apparatus that implements the above-described web W conveying method.

For example, a transport device for a web W that is unwound from a roller 10 or wound on a roller 10,
a conveying unit (not shown) that conveys the web W;
A sensor unit 12 that detects predetermined physical properties of the conveying web W after being drawn out from the rollers 10 or before being wound around the rollers 10, or a processing unit (not shown) that performs predetermined processing on the conveying web W. When,
For the conveying web W after being let out from the roller 10 or before being wound around the roller 10, the inclination of the conveying web W in a side view is detected without contacting the conveying web W, and the inclination change amount θ is calculated as follows. a position information acquisition unit that acquires positional change amounts of the conveying web W;
a position control unit that controls the position of the sensor unit 12 or the processing unit (not shown) based on the position change amount acquired by the position information acquisition unit;
(see, for example, FIG. 1).

Although not shown, as for the transport section, it is sufficient that the transport line can be driven, and known means can be employed. For example, in the case of the first embodiment of the transport method described above, a drive roller or the like capable of driving the transport line can be used as the transport unit. Moreover, in the manufacturing apparatus according to the present embodiment, the content described in the second and third embodiments of the above-described conveying method can be appropriately employed.

As the sensor section 12, as described above, the sensor section 12 used in the detection processes (a) to (e) can be adopted. For example, (a) when measuring the charge amount, a static electricity measuring device using a surface potential sensor can be employed. (a) In the case of detecting foreign matter, a foreign matter/defect inspection device capable of detecting foreign matter from captured images can be employed. (c) In the case of detecting defects, a foreign matter/defect inspection device capable of detecting defects from captured images can be employed. (d) When measuring the coating amount, an in-line film thickness measuring device using spectral interferometry can be employed. (e) When detecting unevenness, a sensor that detects the light source and the intensity of light reflected from the light source can be employed.

Further, as described above, the processing portion used in the processing steps (f) to (sa) can be adopted. For example, when (f) slitting is performed, a slitter or the like capable of cutting the side edges of the conveying web W can be employed. (g) When performing laser processing, a laser irradiation unit capable of irradiating the conveying web W with laser can be employed. (h) When air is jetted onto the conveying web W, a non-contact foreign matter removing device capable of jetting air across the entire width of the conveying web W or locally can be employed. (i) When performing air suction on the conveying web W, a non-contact foreign matter removing device capable of blowing air onto the conveying web W over the entire width or locally can be employed. (J) Meandering prevention device (e.g., EPC (Edge Position Control) device, CPC (Center Position Control) device, etc.) capable of correcting the deviation of the conveyed web W from the reference position when controlling the meandering of the conveyed web W. can be adopted. (k) When the surface of the transported web W is to be modified, a corona treatment apparatus that enhances the activity of the web surface by corona discharge, a plasma treatment apparatus that enhances the activity of the web surface by plasma treatment, or the like can be employed. These processing units described above may be used together with the sensor unit 12 or may be used alone.

As described above, according to the present embodiment, in order to acquire the amount of change in inclination of the conveyed web in a non-contact manner by the above-described position information acquisition step, the web (conveyed web) being conveyed on the line is Position changes can be grasped in real time with high accuracy. Since the position of the sensor section or the processing section is controlled based on the position change of the conveying web obtained in this way, the physical properties of the conveying web can be detected with high accuracy by the sensor section, or the physical properties of the conveying web can be detected with high accuracy. A predetermined processing can be performed with Furthermore, since the transfer method according to the present embodiment can obtain the amount of change in inclination without contact, there is no adverse effect on the transfer line or the product web.

Further, according to the present embodiment, a detection step of detecting predetermined physical properties of the web (for example, the amount of charge on the web, the presence or absence of foreign matter and defects, the amount of coating on the surface of the web, the uneven shape of the web, etc.), and the predetermined processing of the web. (For example, slit processing, laser processing, surface foreign matter removal, web slackness and wrinkle correction, web surface modification, etc.), or both of them, can also be employed. In both the detection process and the processing process, the positions of the sensor section and the processing section can be controlled based on the amount of change in the position information of the conveying web acquired in the position information acquisition process described above, so detection accuracy and processing accuracy are high.

Furthermore, according to the present embodiment, since the positional change amount of the conveying web can be continuously obtained without contact, the ever-changing positional change amount can be fed back to the sensor section, the position control section of the processing section, or the like. It is also possible to control the position of the sensor section and processing section in real time. As a result, the sensor section and the processing section can be controlled so as to always maintain a constant distance from the transfer line. Therefore, this embodiment can detect the physical properties of the conveyed web or process the conveyed web in real time with high accuracy.

The present invention will be described in more detail with reference to the following examples, but the present invention is in no way limited by the following examples.

First, in the feeding test, by changing the measurement distance to the web and measuring the charge amount value at that time, it was verified how much the charge amount value would fluctuate due to the positional fluctuation of the transported web caused by the web feeding. (See reference example).

Next, using the conveying apparatus 1 shown in FIG. 1, the web W was let out from the roll body R, the charge amount of the conveyed web W was measured in real time, and the accuracy was verified (see Examples).

<Reference example>

First, a polyethylene terephthalate film (PET, “Lumirror (trademark) T-60”, thickness 50 μm, manufactured by Toray Industries, Inc.) was prepared as a simulating film for the conveying web. A charge amount measuring device ("APB-01", manufactured by Harada Sangyo Co., Ltd.) was used to measure the charge amount of the simulated film.

Then, the distance (measurement distance) from the surface of the simulated film to the charge amount measuring device is 0 mm (that is, on the simulated film), 25 mm, 50 mm, 75 mm, 100 mm, 125 mm, 150 mm, 175 mm, 200 mm, 300 mm, 500 mm, The charge amount in each case was measured. This measured distance corresponds to the distance between the conveyed web W and the charge amount measuring sensor 120 of the sensor section 12 in the conveying apparatus 1 shown in FIG. 1, which will be described later. The results are shown in FIG.

FIG. 8 is a graph plotting the measured distance to the simulated film and the measured value of the charge amount at that time in the feeding test. In FIG. 8, the measured distance (unit: mm) of the conveyed web to the simulated film is taken on the horizontal axis, and the measured value of the charge amount (unit: kv) at that time is taken on the vertical axis.

As shown in FIG. 8, it was -5.5 kV when the measurement distance was 0 mm, but -4 kV when the measurement distance was 50 mm. As it got closer, it became -0.5 kV when the measurement distance was 500 mm. As described above, it was confirmed that the measurement value of the charge amount greatly varied in the range of -5.5 kV to -0.5 kV due to the fluctuation of the measurement distance of the simulated film.

<Example>

Next, as an example of the present invention, using the conveying apparatus 1 shown in FIG. 1, the web W was let out from the roll body R, the charge amount of the conveyed web W was measured in real time, and the measurement accuracy was verified.

First, as a web W, a roll R was prepared by winding a polyethylene terephthalate film (PET, “Lumirror™ T-60”, thickness 50 μm, manufactured by Toray Industries, Inc.) around a roller 10 . The web length is 500m and the web width is 280mm. Moreover, the roll diameter of the roller 10 was 3 inches.

Next, a charge amount measuring device (“APB-01” manufactured by Harada Sangyo Co., Ltd.) was installed as the charge amount measurement sensor 120 of the sensor section 12 at a position 200 mm before the central axis of the roller 10 . The distance from the sensor unit 12 to the conveyed web W at the start of feeding was set to 50 mm. That is, the measurement distance from the charge amount measurement sensor 120 to the conveyed web W was set to 50 mm.

Then, an electric actuator ("EAC2-E10-ARAK" manufactured by Oriental Motor Co., Ltd.) is used as the front-rear movement part 121 and the rotation movement part 122 of the sensor part 12, and the charge amount measurement sensor 120 to the conveyed web W is measured during conveyance. The position of the charge amount measuring sensor 120 was set to be automatically controlled so that the distance was always maintained at 50 mm.

Further, the first focal length measuring section 13 is installed at a position 50 mm upstream from the sensor section 12 , and the second focal length measuring section 14 is arranged at a position 50 mm downstream from the sensor section 12 . Both the first focal length measuring section 13 and the second focal length measuring section 14 are arranged at the edge portion of the carrier line. Both of these first focal length measuring unit 13 and second focal length measuring unit 14 are cameras equipped with lenses (“CS41-C” manufactured by Shodensha Co., Ltd.). was measured (see FIG. 3).

With respect to the above-described transport line, a transport web W2 was let out from the roller 10 at a transport speed of 20 m/min (see arrow F2 in FIG. 1), and a roll R delivery test was conducted.

In the feeding test, the change amount θ of the inclination of the conveying web W was calculated by the following method (see FIG. 3).

First, at a predetermined time from the start of feeding, the first focal length measuring unit 13 measures the focal length a with respect to the conveying web W1, the second focal length measuring unit 14 measures the focal length c with respect to the conveying web W1, The inclination of the conveyed web W1 was detected from the positional relationship between the distance between the first focal length measuring unit 13 and the second focal length measuring unit 14, the focal length a, and the focal length c.

Subsequently, when a predetermined time has passed since the above measurement, the first focal length measuring unit 13 measures the focal length b with respect to the conveying web W2, and the second focal length measuring unit 14 measures the focal length b with respect to the conveying web W2. d was measured, and the tilt of the transported web W2 was detected from the positional relationship between the arrangement distance between the first focal length measuring section 13 and the second focal length measuring section 14, the focal length b, and the focal length d.

From the detected inclination of the conveying web W1 and the inclination of the conveying web W2, the change amount θ of the inclination at both time points is obtained and used as the position change amount of the conveying web W. FIG.

By performing the above method in real time, the amount of change in inclination θ was acquired in real time from the start of feeding, and the amount of change in the position of the conveyed web W was monitored in real time. The actuator was controlled based on the real-time position change amount of the conveyed web W thus obtained. Specifically, by moving the sensor unit 12 following the amount of change in the position of the conveying web, the sensor unit 12 always maintains the initial measurement distance (50 mm) with respect to the conveying web W in real time. automatically controlled. The results are shown in FIG.

FIG. 9 is a graph showing the measurement results of the charge amount in the feeding test of the example. In FIG. 9, the horizontal axis represents the feed amount (unit: m) of the conveying web W in this rewinding test, and the vertical axis represents the charge amount (unit: kv) by the sensor section 12 .

Based on the results of the reference example (FIG. 8), for example, if the measured distance of the web W is set at a position of 50 mm as a reference, when the measured distance varies from the reference position of 50 mm by −50 mm to +50 mm, the measured value is ±50 mm. It is considered that there was a variation due to the positional variation of about 10%. On the other hand, in the example (FIG. 9), the variation from the start of feeding (surface layer side) to the end of feeding (core side), especially at the end of feeding (core side), is suppressed to a value lower than 50%. I was able to

In addition, in FIG. 9 of the example, in the vicinity of the intermediate layer from the start of feeding (surface layer side) to the feeding amount of 400 m, many peaks of the charge amount instantaneously approaching 0 V were measured. It is considered that the variation due to the amount of positional change of the web W caused by the movement of the web W is not the cause, but that the electric charge on the surface of the web W is discharged immediately after the web W is fed out, resulting in an instantaneous voltage change.

As described above, according to the conveying method of the present embodiment, there is little variation in the measured value of the charge amount of the sensor unit 12 from the start of feeding (0 m feeding amount) to the end of feeding (500 m feeding amount). It was confirmed that the unit 12 was able to perform continuous sensing.

1, 2, 3: transport device,
10: roller,
11: guide rollers,
12: sensor unit,
13: (first) focal length measuring unit,
14: (second) focal length measuring unit,
15: imaging unit,
16: side imaging unit,
120: charge amount measurement sensor,
121: back and forth moving part,
122: Rotation moving part,
150: captured image,
W, W1, W2: (conveyance) web,
R, R1, R2: roll body,
F1, F2, F3, F4, F5, F6, F7, F8: arrows,
A1: right region,
A2: left region,
θ: amount of change in slope,
a, b, c, d: focal length

Claims (10)

A method of conveying a web unwound from or wound on a roller, comprising:
A detecting step of detecting predetermined physical properties of the conveying web after being let out from the roller or before winding onto the roller, or a processing unit performing predetermined processing on the conveying web. a processing step applied by
a position information acquiring step of detecting an inclination of the transport web in a side view without contacting the transport web and acquiring an amount of change in the inclination as an amount of positional change of the transport web;
a position control step of controlling the position of the sensor unit or the processing unit based on the position change amount obtained in the position information obtaining step;
A method of conveying a web, comprising: The position information acquisition step includes:
At least two focal length measuring units with lenses are arranged above or below the web transport line,
For the conveying web, each of the focal length measuring units obtains the focal length to the surface of the conveying web, detects the tilt of the conveying web from the obtained focal length, and measures the amount of change in the tilt. , obtained as the position change amount of the conveying web;
The method of conveying a web according to claim 1. The position information acquisition step includes:
At least two position measuring units each having an irradiation unit capable of emitting energy rays and a light receiving unit capable of receiving the energy rays are arranged above or below the web transport line,
The irradiating unit of each of the position measuring units irradiates the conveying web with the energy beam toward the surface of the conveying web, and the reflected wave of the energy beam reflected from the surface is received by the light receiving unit. obtaining the distance to the conveying web by receiving light, detecting the tilt of the web from the obtained distance, and obtaining the amount of change in the tilt as the amount of positional change of the web;
The method for conveying a web according to claim 1 or 2. The position information acquisition step includes:
At least one imaging unit having a lens is arranged above or below the web transport line,
For the transport web, the imaging unit acquires a captured image by capturing an image of a predetermined location on the surface of the transport web, detects the tilt of the transport web from the image blur of the acquired captured image, and acquiring an amount of change in inclination as the amount of positional change of the conveying web;
The web transport method according to any one of claims 1 to 3. The position information acquisition step includes:
At least one side imaging unit is arranged on the side of the web transport line,
The lateral imaging unit detects the inclination of the web by imaging the transport web from the side surface of the transport web, and acquires the amount of change in the inclination as the amount of positional change of the web.
The web transport method according to any one of claims 1 to 4. The position information acquiring step acquires the positional change amount of the conveying web in real time,
The position control step controls the position of the sensor unit or the processing unit in real time based on the position change amount acquired in real time.
The web transport method according to any one of claims 1 to 5. As the detection step,
a step of measuring the charge amount of the conveying web with the sensor unit;
a step of capturing an image of the surface of the conveying web and detecting the presence or absence of foreign matter by the sensor unit that detects adhesion of foreign matter to the surface;
a step of capturing an image of the surface of the conveying web and detecting the presence or absence of defects by the sensor unit that detects defects on the surface;
measuring the coat amount by the sensor unit for measuring the coat amount on the surface of the conveying web; and
performing at least one selected from the group consisting of a step of detecting an uneven shape by the sensor unit for detecting an uneven shape on the surface of the conveying web;
The web transport method according to any one of claims 1 to 6. As the processing step,
slitting the transport web by the processing unit that cuts the side edges of the transport web;
a step of subjecting the conveying web to laser processing by the processing unit that irradiates the conveying web with a laser;
removing foreign matter from the surface of the conveying web by the processing unit that injects air onto the conveying web;
a step of sucking and removing foreign matter from the surface of the conveying web by the processing unit that sucks air from the surface of the conveying web;
a step of correcting slack and/or wrinkles of the transport web by the processing unit having a guide roll mechanism that controls meandering of the transport web;
At least one selected from the group consisting of modifying the surface of the transport web by the processing unit that performs electrical discharge treatment on the surface of the transport web;
The web transport method according to any one of claims 1 to 7. A feeding step of feeding from the roller, or a winding step of being wound on the roller;
a conveying step of conveying the web by the web conveying method according to any one of claims 1 to 8;
A method of manufacturing a web, comprising: A conveying device for a web that is unwound from or wound on a roller,
a conveying unit that conveys the web;
a sensor unit that detects predetermined physical properties of the conveying web after being drawn out from the roller or before being wound around the roller, or a processing unit that performs predetermined processing on the conveying web;
For the conveying web after being let out from the roller or before being wound around the roller, the inclination of the conveying web in a side view is detected without contacting the conveying web, and the amount of change in the inclination is a position information acquisition unit that acquires a positional change amount of the conveying web;
a position control unit that controls the position of the sensor unit or the processing unit based on the position change amount acquired by the position information acquisition unit;
A web transport device comprising:

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