JP6880610B2 - Tension distribution control device and strip carrier - Google Patents

Description

The present invention relates to a tension distribution control device and a strip transport device.

As a tension distribution control device for controlling the tension distribution in the width direction of a strip-shaped body such as a film, a sheet, or a tape, the tension control device described in Patent Document 1 below is known. This tension control device is a device for controlling the tension of the traveling magnetic tape in the tape width direction to be uniform, and includes a tension detection unit that detects the tension distribution of the magnetic tape in the tape width direction and a magnetic field. The tension in the tape width direction of the magnetic tape is uniform based on the detection result of the tension adjustment part and the tension detection part that press the weak tension part of the tape in the tape width direction to eliminate the tension difference in the tape width direction. It is configured to include a control unit that controls the tension adjustment unit so as to be.

Japanese Unexamined Patent Publication No. 2004-206818

In the above-mentioned prior art, the tension in the width direction of the strip is made uniform by pressing the roller against the key points of the strip. However, the control of the tension distribution of the strip by pressing the roller causes the strip to be deformed into a convex or concave shape. If the band-shaped body is deformed out of the plane in this way, there is a problem that the band-shaped body is easily damaged.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a tension distribution control device and a band-shaped body transport device capable of controlling the tension distribution of the band-shaped body while suppressing damage to the band-shaped body. And.

In order to solve the above problems, the present invention loads the guide roller in contact with the traveling strip and the contact portion of the strip in contact with the guide roller in the in-plane direction of the strip. By applying, a tension distribution control device having a tension distribution forming means for forming a tension distribution of the tension in the traveling direction of the strip-shaped body in the width direction intersecting the traveling direction is adopted.

Further, in the present invention, the guide roller is divided in the width direction, and each of the guide rollers is formed of a plurality of divided rollers that can rotate at different rotation speeds.

Further, in the present invention, the tension distribution forming means applies a load in the in-plane direction to at least one of the plurality of contact portions of the strip-shaped body in contact with the plurality of dividing rollers. The configuration of forming the tension distribution is adopted.

Further, in the present invention, the plurality of dividing rollers are a central roller that contacts the central portion in the width direction of the strip, and a pair that is provided on both sides of the central roller and contacts both sides of the strip in the width direction. Adopt a configuration that has a side roller.

Further, in the present invention, the tension distribution forming means adopts a configuration having a contact roller in contact with the dividing roller and a rotation torque control means for controlling the rotation torque of the contact roller.

Further, in the present invention, the tension distribution forming means includes a contact roller that contacts a contact portion of the strip-shaped body that is in contact with the dividing roller, a rotational torque control means that controls the rotational torque of the contact roller, and the like. Is adopted.

Further, in the present invention, the rotational torque control means adopts a configuration having a clutch connected to the contact roller and a motor connected to the clutch.

Further, in the present invention, a strip-shaped body transporting device having a nip roller for traveling the strip-shaped body and the above-described tension distribution control device for controlling the tension distribution in the width direction of the tension in the traveling direction of the strip-shaped body is adopted. To do.

In the present invention, by applying a load to the contact portion of the strip-shaped body in contact with the guide roller in the in-plane direction of the strip-shaped body, the tension in the traveling direction of the strip-shaped body is in the width direction intersecting the traveling direction. Form the tension distribution in. According to this configuration, a load for forming a tension distribution on the band-shaped body is applied to the contact portion of the band-shaped body supported by the guide roller, and the direction of the load is the in-plane direction of the band-shaped body. The strip will not be out-of-plane deformation.
Therefore, in the present invention, it is possible to control the tension distribution of the band-shaped body while suppressing the damage of the band-shaped body.

It is a block diagram of the film transfer apparatus in embodiment of this invention. It is a figure which shows the internal structure of the guide roller and the arrangement of the tension distribution forming means in embodiment of this invention. It is a block diagram of the tension distribution forming means in embodiment of this invention. It is a figure which shows an example of the tension distribution in the width direction intersecting with the running direction of the tension generated in the film in the running direction in embodiment of this invention. It is a graph which shows typically the tension distribution shown in FIG. It is a figure which shows an example of the tension distribution in the width direction intersecting with the running direction of the tension generated in the film in the running direction in embodiment of this invention. It is a graph which shows typically the tension distribution shown in FIG. It is a top view which shows the state of the tension distribution control test using the tension distribution control apparatus in embodiment of this invention. It is a graph which shows the result of the tension distribution control test shown in FIG. It is a block diagram of the tension distribution control apparatus which concerns on one modification of embodiment of this invention. It is a block diagram of the tension distribution control apparatus which concerns on one modification of embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a film transport device for transporting a strip-shaped film will be illustrated as a strip-shaped body transport device including a tension control device.

FIG. 1 is a configuration diagram of a film transport device 100 according to an embodiment of the present invention.
As shown in FIG. 1, the film transport device 100 controls the tension distribution of the nip roller 1 for traveling the strip-shaped film F and the tension in the traveling direction of the film F in the width direction intersecting the traveling direction. A device 2 and cameras A and B for observing the tension of the film F in the width direction are provided. The film transfer device 100 of the present embodiment conveys, for example, a film F having a width of about 50 mm to 100 mm and a thickness of about 0.1 to 0.3 mm.

The film F is formed in a strip shape having a constant width, and is unwound from a roll body (not shown) by, for example, a roll-to-roll method. The film F may be a single film or a laminated film in which two or more types of films are bonded together. Further, the laminated film may be one in which the films are bonded in the middle of transportation, or one in which the films are bonded from the beginning. Examples of the single film include a resin film such as PET, and examples of the laminated film include a metal conductor film bonded with a resin protective film.

The nip roller 1 is composed of a pair of rollers 11 and 12, and sandwiches the film F in the thickness direction. The roller 11 comes into contact with one main surface F1 of the film F. Further, the roller 12 comes into contact with the other main surface F2 of the film F. The pair of rollers 11 and 12 run the film F by being rotated by a drive source such as a motor (not shown). One of the pair of rollers 11 and 12 may be a drive roller connected to a drive source, and the other may be a driven roller that rotates via a gear or the like, and both are connected to the drive source. It may be a drive roller.

The tension distribution control device 2 is arranged on the upstream side of the nip roller 1 in the traveling direction of the film F. The tension distribution control device 2 forms a tension distribution that cancels the tension distribution in the width direction of the tension in the traveling direction of the film F, which will be described later, formed by the nip roller 1 and makes the tension distribution of the film F constant. .. The tension distribution control device 2 applies a load to the guide roller 21 in contact with the traveling film F and the contact portion F3 of the film F in contact with the guide roller 21 in the in-plane direction of the film F. The film F has a tension distribution forming means 22 for forming a tension distribution in the width direction of the tension in the traveling direction.

Here, the in-plane direction in which the load is applied to the film F is a direction indicating the inside of the traveling surface of the film F, that is, a direction including a component (front-rear component) in the traveling direction of the film F (even if it is an oblique direction). Good). However, the width direction of the film F, which is a direction orthogonal to the traveling direction of the film F, is not included. The preferred in-plane direction in which the load is applied to the film F is the traveling direction of the film F, that is, the front-rear direction of the film F.

The guide roller 21 comes into contact with the other main surface F2 of the film F. The film F is oriented 90 ° on the guide roller 21, and about 1/4 of the peripheral surface of the guide roller 21 is in contact with the film F. It should be noted that the guide roller 21 does not necessarily have to have about 1/4 of its peripheral surface in contact with the film F, and may have only a contact surface in contact with the film F regardless of its size.
The tension distribution forming means 22 includes a contact roller 23 that comes into contact with the guide roller 21, and a rotational torque control means 24 that controls the rotational torque of the contact roller 23.

FIG. 2 is a diagram showing the internal configuration of the guide roller 21 and the arrangement of the tension distribution forming means 22 according to the embodiment of the present invention. FIG. 3 is a block diagram of the tension distribution forming means 22 according to the embodiment of the present invention.
As shown in FIG. 2, the guide roller 21 is divided in the width direction, and each is formed of a plurality of divided rollers 30 that can rotate at different rotation speeds.

The plurality of split rollers 30 include a central roller 31 that contacts the central portion of the film F in the width direction and a pair of side rollers 32 and 33 that are provided on both sides of the central roller 31 and contact both sides of the film F in the width direction. Have. That is, the guide roller 21 of the present embodiment is divided into three in the width direction. In the present embodiment, the lengths of the central roller 31, the side rollers 32, and 33 are the same, respectively. The lengths of the central roller 31, the side rollers 32, and 33 may be different from each other.

The plurality of split rollers 30 are rotatably provided on a common shaft 40 via bearings 41 and 42, respectively. The inner rings of the bearings 41 and 42 are fixed to a cylindrical inner sleeve 43 fitted on the outer circumference of the shaft 40. Further, the outer rings of the bearings 41 and 42 are fixed to the cylindrical outer sleeve 44. The outer sleeve 44 is fitted inside the cylindrical roller portion 45. The peripheral surface of the roller portion 45 comes into contact with the other main surface F2 of the film F. With this configuration, each of the plurality of split rollers 30 can rotate at a different rotation speed.

The tension distribution forming means 22 applies a load in the in-plane direction to at least one of the plurality of contact portions F3 of the film F in contact with the plurality of dividing rollers 30 through the dividing rollers 30 to form the film F. Form a tension distribution in the width direction of. A plurality of tension distribution forming means 22 of the present embodiment are provided so as to face each of the plurality of dividing rollers 30. That is, in the present embodiment, a load is applied to the contact portions F3 of the plurality of split rollers 30 in the in-plane direction of the film F. If the tendency of the tension distribution in the width direction of the film F formed by the nip roller 1 is known in advance, it is not necessary to provide the tension distribution forming means 22 in all of the plurality of divided rollers 30. For example, when the tension at the center of the film F in the width direction is higher or lower than the tension on both sides in the width direction, the tension distribution forming means 22 may be provided only on the center roller 31 or only on the side rollers 32 and 33. According to this configuration, the number of parts and the manufacturing cost can be reduced.

The tension distribution forming means 22 has a contact roller 23 that comes into contact with the dividing roller 30, and a rotational torque controlling means 24 that controls the rotational torque of the contact roller 23, and the film is passed through the dividing roller 30 (guide roller 21). A load is applied to the contact portion F3 of F. The contact roller 23 is rotatably provided around an axis parallel to the shaft 40. The length of the contact roller 23 is shorter than the length of the split roller 30, and is arranged so as to face the center of the split roller 30. The rotational torque control means 24 controls the rotational torque of the split roller 30 by applying the rotational torque to the contact roller 23.

As shown in FIG. 3, the rotational torque control means 24 has a clutch 25 connected to the contact roller 23 and a motor 26 connected to the clutch 25. The clutch 25 transmits the rotational torque of the motor 26 to the contact roller 23. As the clutch 25, it is preferable to use a clutch capable of adjusting the magnitude of the rotational torque transmitted from the motor 26 to the contact roller 23 to an arbitrary value. For example, as the clutch, a powder clutch or the like that uses powder (magnetic iron powder or the like) for transmitting rotational torque can be used.

The contact roller 23, the clutch 25, and the motor 26 are supported by a common frame 27A. The frame 27A has a bearing 27A1 that supports the contact roller 23, a clutch support portion 27A2 that supports the clutch 25, and a motor support portion 27A3 that supports the motor 26. The frame 27A is supported by a cylinder 28. The cylinder 28 moves the frame 27A so that the contact roller 23 is brought close to and separated from the dividing roller 30. The cylinder 28 is attached to a fixed base frame 27B. Further, a fixing member 29 for fixing the positional relationship between the dividing roller 30 and the contact roller 23 is attached to the base frame 27B after the position is adjusted by the cylinder 28. The fixing member 29 is a spacer having a screw adjusting mechanism, and is configured to be interposed between the frame 27A and the base frame 27B to maintain the space.

FIG. 4 is a diagram showing an example of tension distribution in the width direction intersecting the running direction of the tension generated in the film F in the running direction according to the embodiment of the present invention. FIG. 5 is a graph schematically showing the tension distribution shown in FIG.
FIG. 4 shows a case where the contact area of the film F with respect to the nip roller 1 has an effect. As shown in FIG. 4, when the film F is a laminated film in which a wide first film f1 and a narrow second film f2 are bonded together, high tension occurs at the central portion of the film F in the width direction. , The tension is low on both sides of the film F in the width direction. That is, in the central portion of the film F in the width direction, the first film f1 and the second film f2 overlap and the film F becomes thicker, so that a large load is received from the nip roller 1. Further, on both sides of the film F in the width direction, since the thickness of the film F is thin only in the first film f1, the load received from the nip roller 1 is relatively smaller than that in the central portion in the width direction. Therefore, as shown in FIG. 5, the tension distribution has a shape in which the central portion of the film F in the width direction is convex.

FIG. 6 is a diagram showing an example of tension distribution in the width direction intersecting the running direction of the tension generated in the film F in the running direction according to the embodiment of the present invention. FIG. 7 is a graph schematically showing the tension distribution shown in FIG.
FIG. 6 shows a case where the bending of the nip roller 1 has an effect. As shown in FIG. 6, when both ends of the nip roller 1 are close to each other and the central portion sandwiching the film F is bent so as to bulge, the tension becomes low at the central portion in the width direction of the film F, and both sides of the film F in the width direction. (More specifically, both ends in the width direction of the film F in which the first film f1 and the second film f2 overlap (the portion indicated by the thick arrow in FIG. 6A)) have high tension. That is, since the gaps between the rollers 11 and 12 are narrowed on both sides of the film F in the width direction, a large load is received from the nip roller 1. In the central portion of the film F in the width direction, the gaps between the rollers 11 and 12 are widened, so that the load received from the nip roller 1 is relatively smaller than that on both sides in the width direction. Therefore, as shown in FIG. 7, the tension distribution has a shape in which the central portion of the film F in the width direction is concave.

FIG. 8 is a plan view showing a state of a tension distribution control test using the tension distribution control device 2 according to the embodiment of the present invention. FIG. 9 is a graph showing the results of the tension distribution control test shown in FIG.
In the tension distribution control test shown in FIG. 8, the film F fixed in the nip roller 1 is uniformly tensioned in the entire width direction on the downstream side of the guide roller 21. Further, the film F is provided with markers 1 to 9 in the width direction in the vicinity of the nip roller 1 and the guide roller 21. Under this condition, the effect of the tension distribution control device 2 was confirmed by controlling the rotational torque of the central roller 31 and measuring the displacements of the markers 1 to 9 with the cameras A and B.

FIG. 9 shows the stress changes in the markers 1 to 9 in the vicinity of the guide roller 21 observed by the camera A. The stress shown in FIG. 9 is a pseudo representation of a change in stress applied to each measurement point by using the displacement of the marker and the distance between the nip roller 1 and the camera A. In FIG. 9, in order to make the tension distribution in the width direction of the film F constant, the output for rotating the motor 26 in the normal direction (rotation in the direction in which the film F is pulled) is gradually reduced, and conversely, the clutch output of the clutch 25 is gradually reduced. The result when it is changed greatly is shown. Further, in FIG. 9, the observation by the camera A is shown, and the number indicates the clutch output (%).

It can be seen that by increasing the clutch output of the clutch 25, a tension distribution as shown in FIG. 9 can be formed in the width direction of the film F. That is, in the test results of FIG. 9, it was confirmed that by controlling the rotational torque of the central roller 31, it is possible to form a tension distribution that is convex or concave in the central portion in the width direction of the film F. Therefore, in the tension distribution control device 2, a tension distribution that cancels the tension distribution is formed corresponding to the tension distribution in the width direction of the film F shown in FIGS. 4 and 5 or 6 and 7 described above. Therefore, the tension distribution in the width direction of the film F can be made constant. The tension distribution in the width direction of the film F is constant, and for example, a laminated film in which the first film f1 and the second film f2 are bonded together has a constant tension distribution even when cut out to a predetermined size, so that the end portion thereof is There will be no warping.

In the present embodiment, as shown in FIG. 1, the in-plane direction of the film F with respect to the contact portion F3 of the film F in contact with the guide roller 21 (in the tension distribution control test of FIGS. 8 and 9, the film F). By applying a load to the rear side in the traveling direction of the film F, a tension distribution is formed in the width direction of the film F. According to this configuration, a load for forming a tension distribution in the width direction of the film F is applied to the contact portion F3 of the film F supported by the guide roller 21, and the direction in which the load is applied is the surface of the film F. Since it is in the inward direction, the film F is not deformed out of the plane.
Therefore, in the present embodiment, the tension distribution of the film F can be controlled while suppressing the damage of the film F.

Further, in the present embodiment, as shown in FIG. 2, the guide roller 21 is divided in the width direction and is formed of a plurality of divided rollers 30 each of which can rotate at a different rotation speed. According to this configuration, it becomes easy to form a tension distribution in the width direction of the film F. For example, even if the rotational torque is controlled by one of the split rollers 30, the other split rollers 30 are rotating and are hardly affected by the rotation torque. .. Therefore, it is possible to form a tension distribution in an arbitrary shape without considering the influence on the whole.

Further, the split roller 30 of the present embodiment includes a central roller 31 that contacts the central portion of the film F in the width direction, and a pair of side rollers 32 that are provided on both sides of the central roller 31 and come into contact with both sides of the film F in the width direction. 33 and. According to this configuration, it becomes easy to form a convex or concave tension distribution in the central portion of the film F in the width direction, and the tension distribution in the width direction of the film F shown in FIGS. 4 and 5 or 6 and 7 described above. It is possible to easily form a tension distribution that cancels out.

Further, in the present embodiment, the tension distribution forming means 22 includes a contact roller 23 that contacts the dividing roller 30, and a rotational torque control means 24 that controls the rotational torque of the contact roller 23. According to this configuration, as shown in FIG. 2, it is possible to almost eliminate the gap between the split rollers 30 and prevent the formation of a space in which tension is released. For example, the shaft 40 can be divided and the rotary torque control means 24 can be directly attached to the rotary shaft of each split roller 30, but in this case, the rotary torque control means 24 is arranged between the split rollers 30. Space is needed. On the other hand, in the present embodiment, since the rotational torque of the split roller 30 is controlled from the circumferential direction via the contact roller 23, it is possible to close the space between the split rollers 30 and prevent the tension from being released.

As described above, according to the above-described embodiment, the guide roller 21 in contact with the traveling film F and the contact portion F3 of the film F in contact with the guide roller 21 are directed in the in-plane direction of the film F. By adopting a configuration in which the film F has a tension distribution forming means 22 for forming a tension distribution of the tension in the traveling direction of the film F in the width direction intersecting the traveling direction by applying a load, the film F The tension distribution of the film F can be controlled while suppressing scratches.

Although the preferred embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the above embodiment. The various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like within a range that does not deviate from the gist of the present invention.

For example, the present invention may employ modifications as shown in FIGS. 10 and 11. In the following description, the same or equivalent configurations as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be simplified or omitted.

FIG. 10 is a configuration diagram of a tension distribution control device 2A according to a modification of the embodiment of the present invention.
The tension distribution control device 2A shown in FIG. 10 includes a contact roller 23A that contacts the contact portion F3 of the film F that is in contact with the split roller 30, and a rotational torque control means 24A that controls the rotational torque of the contact roller 23A. Have. The contact roller 23A is in direct contact with one main surface F1 of the film F. The rotational torque control means 24A is provided inside the contact roller 23. The contact roller 23A is pressed against the film F by cylinders 28A that are rotatable with respect to the shaft 50 and are provided at both ends of the shaft 50. The rotational torque control means 24A is a clutch (powder clutch or the like) interposed between the shaft 50 and the contact roller 23A, and controls the rotational torque (rotational resistance) of the contact roller 23A.
According to this configuration, since the contact roller 23 applies a load to the contact portion F3 of the film F supported by the (guide roller 21) of the split roller 30, the film F is not deformed out of the plane. Further, a load can be applied to the film F in the in-plane direction by the frictional force generated by controlling the rotational torque of the contact roller 23A. Therefore, the tension distribution of the film F can be controlled without deforming the film F out of the plane.

FIG. 11 is a configuration diagram of a tension distribution control device 2B according to a modification of the embodiment of the present invention.
The tension distribution control device 2B shown in FIG. 11 has a configuration in which the rotational torque control means 24B is provided inside the split roller 30. The rotational torque control means 24B is a clutch (powder clutch or the like) interposed between the shaft 40 and the split roller 30, and controls the rotational torque (rotational resistance) of the split roller 30. Even with this configuration, a load for forming a tension distribution in the width direction of the film F is applied to the contact portion F3 of the film F supported by the dividing roller 30, and the direction in which the load is applied is in the plane of the film F. Since it is in the direction, the tension distribution of the film F can be controlled without deforming the film F out of the plane.

Further, for example, in the above embodiment, the film F is exemplified as the strip-shaped body, but the present invention can also be applied to, for example, controlling the tension distribution of other strip-shaped bodies such as sheets and tapes.

1 Nip roller 2 Tension distribution control device 2A Tension distribution control device 2B Tension distribution control device 21 Guide roller 22 Tension distribution forming means 23 Contact roller 23A Contact roller 24 Rotation torque control means 24A Rotation torque control means 24B Rotation torque control means 30 Split roller 31 Central roller 32 Side roller 33 Side roller 100 Film transfer device (strip-shaped body transfer device)
F film (belt)
F3 contact part

Claims (6)

A guide roller that comes into contact with the traveling strip,
By applying a load in the in-plane direction of the strip to the contact portion of the strip in contact with the guide roller, the tension in the traveling direction of the strip is in the width direction intersecting the traveling direction. It has a tension distribution forming means for forming a tension distribution, and has.
The guide roller is divided in the width direction and is formed of a plurality of divided rollers, each of which can rotate at a different rotation speed.
The tension distribution forming means
With the contact roller in contact with the split roller,
A tension distribution control device comprising a rotational torque control means for controlling the rotational torque of the contact roller. The tension distribution forming means forms the tension distribution by applying a load in the in-plane direction to at least one of the plurality of contact portions of the strip-shaped body in contact with the plurality of dividing rollers. The tension distribution control device according to claim 1. The plurality of split rollers
A central roller that contacts the central portion of the strip in the width direction,
The tension distribution control device according to claim 1 or 2, further comprising a pair of side rollers provided on both sides of the central roller and in contact with both sides of the strip in the width direction. The tension distribution control device according to any one of claims 1 to 3, wherein the contact roller contacts the contact portion instead of the split roller. The rotational torque control means
With the clutch connected to the contact roller,
The tension distribution control device according to claim 1 or 4, further comprising a motor connected to the clutch. A nip roller that runs a strip and
The strip-shaped body transporting device comprising the tension distribution control device according to any one of claims 1 to 5, which controls the tension distribution in the width direction of the tension in the traveling direction of the strip-shaped body.

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