JP2016537283A - Tension adjusting device and web continuous processing method using the same - Google Patents

Abstract

The present invention includes a dancer that applies a force to a web to adjust the tension of the web, and the dancer includes a first ultrasonic vibration unit, and the first ultrasonic vibration unit vibrates ultrasonically. The tension adjusting device is characterized by applying a repulsive force by the ultrasonic vibration to the web and applying the force to the web in a non-contact state. The present invention also provides a web continuous processing method comprising the steps of: adjusting the tension of the web using the tension adjusting device; and processing the web of which the tension is adjusted. To do.

Description

  The present invention relates to a tension adjusting device and a web continuous processing method using the same, and more particularly, a tension adjusting device that adjusts the web tension in a non-contact manner by applying a repulsive force generated by ultrasonic vibration to the web. And a web continuous processing method using the same.

  The web means a material that is flexible and continuous in the longitudinal direction. A continuous processing system for continuously processing such a web includes a winder, an unwinder, and a plurality of driven rollers. (Drive roller), idle roller (idle roller), and the like. The continuous processing process generally proceeds in a roll-to-roll or roll-to-sheet process. A dancer mechanism is used as one of the methods to control the tension in the roll-to-roll or roll-to-sheet process, and it has a certain size in a certain direction by a spring, air pressure, weight, etc. as a pressure device. It is an apparatus configured to apply a force so that a constant tension is applied to the web regardless of the variation in its position.

  FIG. 1 is a view schematically showing a conventional tension adjusting device.

  As shown in the figure, the dancer roller 311 makes mechanical contact (friction) with the web W to adjust the tension. Support rollers 312 and 313 support the web W at a fixed position.

  A web, particularly a thin glass web or a thin glass sheet obtained therefrom, can be used in various fields such as displays, electronic materials (solar cells, touch sensors, wafers, etc.), architecture, and home appliances. Thin glass webs are susceptible to damage by mechanical contact before being coated with a protective coating. Therefore, it is necessary to avoid mechanical contact of the uncoated glass web before the coating of the protective film. Further, the thin glass web is made of a glass having a high hardness and may damage the surface of the roller. In the case of a conventional tension adjusting device, an expensive method such as chrome coating is used in order to suppress damage to the roller, but this is an increase factor of equipment cost.

  Conventionally, there has been a system in which a web is supported by discharging a fluid vent to the outer surface of an arched dancer roller by a contact (friction) dancer roller or by a non-contact technique. However, the former tends to damage the surface of the thin glass web due to mechanical contact, and the latter is difficult to adjust the height of the web even with the flow rate of compressed air, and the force of maintaining the web in a non-contact state with the web. Since the force is very weak, there is a problem that if the web is unstable (such as shaking), it is easy to touch. (Non-contact dancer mechanism KR2011-0095191)

  In addition, the thin glass web has brittle material characteristics, and has a characteristic that it is easily broken by a conventional method of controlling by elongation. Also, in the conventional web conveyance, when a lateral deviation occurs, the tension is controlled by driving the dancer roller up and down and stretching the web itself using the elongation of the web itself. The thin glass web of the material has a low elongation, which increases the possibility of mechanical contact and breakage.

  The present invention has been made in order to solve the above-described problems of the prior art, and the object thereof is to apply a tension disturbance to the web without mechanical contact during web conveyance. Is to provide a dancer mechanism that applies (pressure) and keeps the web in uniform tension

  To achieve the above object, the present invention includes a dancer that applies a force to a web to adjust the tension of the web, the dancer including a first ultrasonic vibration unit, The sonic vibration unit provides a tension adjusting device characterized by ultrasonically vibrating, applying a repulsive force due to the ultrasonic vibration to the web, and applying the force to the web in a non-contact state.

  The present invention also provides a web continuous processing method comprising the steps of: adjusting the tension of the web using the tension adjusting device; and processing the web of which the tension is adjusted. To do.

  The present invention configured as described above is a device having a non-contact dancer mechanism (control of tension generated during conveyance and removal of mechanical contact) for stably conveying a web, and for using the same A method can be provided.

  Thus, the present invention avoids damage due to mechanical contact of brittle materials such as thin glass webs, eliminates the need for additional dancer roller processing such as mechanical coating, and makes the web uniform Provided is a method capable of adjusting the tension by conveying at a high height.

It is a figure which shows the conventional tension adjusting device. It is a figure which shows roughly the basic principle of tension adjustment of this invention. It is a figure showing roughly the tension adjustment device concerning the 1st example of the present invention. It is a figure which shows roughly the tension adjustment apparatus which concerns on the 2nd Example of this invention. It is a figure which shows schematically the tension adjustment apparatus which concerns on the 3rd Example of this invention. It is a figure which shows schematically the tension adjusting apparatus which concerns on the 4th Example of this invention. It is a figure which shows schematically the tension adjusting apparatus which concerns on the 5th Example of this invention. It is a figure which shows schematically the tension adjusting apparatus based on the 6th Example of this invention. It is a figure which shows schematically the tension adjusting apparatus based on the 7th Example of this invention. It is a figure which shows schematically the tension adjusting device based on the 8th Example of this invention. It is a figure which shows roughly the tension adjusting apparatus based on the 9th Example of this invention. It is a figure which shows roughly the tension adjusting apparatus based on the 10th Example of this invention. It is a figure which shows roughly the tension adjusting apparatus based on the 11th Example of this invention. It is a figure which shows roughly the tension adjustment apparatus based on the 12th Example of this invention. It is a figure which shows roughly the tension adjustment apparatus based on the 12th Example of this invention. It is a figure which shows roughly the tension adjusting apparatus based on the 13th Example of this invention. It is a figure which shows roughly the tension adjusting apparatus based on the 13th Example of this invention. It is a figure which shows roughly the tension adjusting apparatus based on the 13th Example of this invention. It is a figure which shows roughly the web continuous processing method which concerns on the 14th Example of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  Non-contact dancer (Dancer) is used for tension disturbance generated during web transport in roll-to-roll or roll-to-sheet process for continuous web processing. And control.

  The present invention is particularly concerned with the treatment of brittle material webs, such as thin glass webs, and in particular tension adjustment with a non-contact dancer 320 for conveying a web of brittle material. The present invention relates to a device and a continuous processing method for web W using the same.

  FIG. 2 is a diagram schematically showing the basic principle of tension adjustment according to the present invention.

  The tension adjusting device of the present invention includes a dancer 320. The dancer 320 in FIG. 2 includes a first ultrasonic vibration unit 321, an ultrasonic generation unit 322, a vibration absorption unit 324, and a fixed frame 325. The dancer 320 applies a force to the web W to adjust the tension of the web W. The dancer 320 includes a first ultrasonic vibration unit 321. The first ultrasonic vibration unit 321 vibrates ultrasonically. The first ultrasonic vibration unit 321 applies a repulsive force of the high-pressure air layer generated by the ultrasonic vibration to the web W, and applies a force to the web W in a non-contact state.

  The dancer 320 includes an ultrasonic wave generation unit 322. The ultrasonic wave generation unit 322 generates ultrasonic waves and vibrates the first ultrasonic vibration unit 321. The dancer 320 may include a vibration absorbing unit 324 for preventing the vibration of the first ultrasonic vibration unit 321 from being transmitted to other components of the tension generator.

  Ultrasonic vibration technology (Korea published patent KR2010-0057530) is applied so as to be separated from the outer surface of the dancer 320. A force for pushing out the web W is generated on the outer surface of the dancer 320 by a periodic air compression phenomenon caused by ultrasonic waves, thereby preventing mechanical contact and damage to the web W of brittle material.

  Unlike the conventional non-contact tension adjusting device using a fluid vent, when an unstable state (vibration, shaking, etc.) of the web W occurs, the magnitude of the force (Repelling force) is automatically adjusted accordingly. Therefore, the pushing force is uniformly generated on the entire surface, and the non-contact state with the thin glass web W can be kept constant.

  A constant force is continuously applied to the web W from the outside for tension control, so that the web W is maintained at a constant tension. For speed control, if one of winding and unwinding is a master and the other is a slave, the height of the dancer 320 is measured in real time and fed back to adjust the winding speed of the slave. And the difference in unwinding speed can be controlled and synchronized in real time.

  Here, the web W may typically be a thin glass, but the present invention is not limited to this. The web W of the present invention may be made of other various materials.

  FIG. 3 is a view schematically showing a tension adjusting apparatus according to the first embodiment of the present invention.

  The tension adjusting device of FIG. 3 includes a link 331 for supporting the dancer 320. One end of the link 331 is hinged to the dancer 320 and the other end is hinged to a fixed point. As a result, the dancer 320 can freely rotate about the fixed point, and the dancer 320 applies a uniform force corresponding to the weight of the dancer 320 to the web W. As a result, the tension adjusting device can actively adjust the tension of the web W.

  4 to 5 are views schematically showing a tension adjusting apparatus according to a second embodiment of the present invention.

  As shown in FIG. 4, the outer surface of the first ultrasonic vibration unit 321 has an open curve along the longitudinal direction of the web W or a circle shown in FIG. 5. Good. In the conventional contact dancer 320, the dancer roller must be rotated by friction with the web W. However, the dancer 320 of the present invention does not generate friction due to non-contact force pushed out by compressed air. There is no need to rotate. Therefore, unlike the conventional circular dancer roller, the outer surface of the first ultrasonic vibration unit 321 does not necessarily form a circle.

  4 and 5 includes a support portion that supports the web W in a fixed position. The support part includes second ultrasonic vibration parts 341 and 342. The second ultrasonic vibration unit vibrates ultrasonically. The first ultrasonic vibration unit 321 applies a repulsive force to the first surface of the web W, whereas the second ultrasonic vibration units 341 and 342 apply the repulsive force due to the ultrasonic vibration to the first surface. In addition to the second surface which is the back surface, the web W is supported in a non-contact state.

  As shown in FIGS. 4 and 5, the thin glass web W is loosely restrained by using the dancer 320 and the arch-shaped support portion, thereby minimizing the stress of the thin glass web W which is a brittle material so as not to be broken. Configured.

  If necessary, a dancer 320 can be used instead of the fixed position support portion.

  6 to 9 are diagrams schematically showing tension adjusting devices according to fourth to seventh embodiments of the present invention.

  The tension adjusting device of FIGS. 6 to 9 includes a link 332. One end of the link 332 is coupled to the dancer 320, and the other end is coupled to a piston of a cylinder 333 (eg, a hydraulic cylinder, a pneumatic cylinder, etc.). The internal pressure of the cylinder 333 is kept constant, and a differential pressure between the internal pressure and the external atmospheric pressure is applied to the dancer 320 via the link 332. That is, the dancer 320 is mechanically connected to the cylinder 333 and applies a constant pressure to the web W uniformly.

  In addition, various pressurizing means may be used. For example, a spring may be provided, and one end of the spring may be coupled to the dancer 320, and the other end may be coupled to a fixed point. That is, the dancer 320 is mechanically connected to the spring and applies a certain elastic force to the web W uniformly.

  10 and 11 are views schematically showing tension adjusting devices according to the eighth and ninth embodiments of the present invention.

  As shown in the figure, an example of a non-contact upper and lower dancer 320 mechanism using a cylinder 333 in a down horizontal or horizontal up web (Web) process.

  12 and 13 are diagrams schematically showing tension adjusting devices according to the tenth and eleventh embodiments of the present invention.

  In the figure, a non-contact dancer 320 mechanism in which cylinders 333T and 333B are vertically arranged is shown. The web W can be loosely configured to minimize the warping stress of the brittle material, and the vertical tension adjustment can be finely adjusted.

  12 and 13 further includes a link T (332T) and a link B (332B) coupled to the dancer 320 from opposite directions toward both sides of the web W, respectively. One end of the link T (332T) is coupled to the dancer 320, and the other end is coupled to the piston of the cylinder T (333T). One end of the link B (332B) is coupled to the dancer 320, and the other end is coupled to the piston of the cylinder B (333B).

  14 and 15 are views schematically showing a tension adjusting apparatus according to a twelfth embodiment of the present invention.

  As shown in the figure, when the web W is transported, the left-right position of the non-contact dancer 320 fluctuates up and down due to the left-right tension deviation. Therefore, it is possible to individually cope with the lateral tension deviation without stretching the thin glass.

  14 and 15 includes a link L (332L) and a tilt link that are respectively coupled to the dancer 320 from both sides along the width direction of the web W so that the left and right positions of the dancer 320 can be individually adjusted. 334 and a link R (332R) coupled to the tilt link 334. One end of the link L (332L) is hinged to the dancer 320, and the other end is coupled to the piston of the cylinder L (333L). The tilt link 334 is hinged at one end to the dancer 320. One end of the link R (332R) is hinge-coupled to the other end of the tilt link 334, and the other end is coupled to the piston of the cylinder R (333R).

  For example, assume that cylinder L (333L) and cylinder R (333R) apply a constant downward force 10 to web W. Correspondingly, the web W applies an upward force 10 to the cylinders 333L, 333R by its tension to balance the force. Here, a case is considered where the tension at the left end of the web W does not change, but the tension at the right end decreases. In this case, there should be no position fluctuation at the left end of the dancer 320. However, the balance between the downward force applied to the right end of the dancer 320 by the cylinder 333R and the upward force applied to the dancer 320 by the tension of the web W is lost, and the dancer 320 moves downward until a new force balance is established. Should do. For this reason, the dancer 320 should have a position where the right end is lower than the left end.

  16 to 18 are views schematically showing a tension adjusting device according to a thirteenth embodiment of the present invention.

  Even if the cylinders 333LT, 333LB, 333RT, and 333RB are coupled to both ends of the dancer 320 from the left, right, and top, the tension can be adjusted more finely even if the left and right tension deviation of the web W occurs.

  16 to 18 include a link LT (332LT), a link LB (332LB), a tilt link 334, a link RT (332RT), and a link RB (332RB).

  The link LT (332LT) and the link LB (332LB) are hinged to one end in the width direction of the dancer 320 along the width direction of the web W, and the width of the dancer 320 from opposite directions toward both sides of the web W, respectively. It is hinged to one end in the direction. One end of the link LT (332LT) is hinge-coupled to one end in the width direction of the dancer 320, and the other end is coupled to a piston of the cylinder LT (333LT). One end of the link LB (332LB) is hinge-coupled to one end in the width direction of the dancer 320, and the other end is coupled to a piston of the cylinder LB (333LB).

  The tilt link 334 is hinged to the other end in the width direction of the dancer 320 along the width direction of the web W. One end of the tilt link 334 is hinged to the other end of the dancer 320 in the width direction.

  Link RT (332RT) and link RB (332RB) are coupled to tilt link 334, respectively. One end of the link RT (332RT) is hinged to the other end of the tilt link 334, the other end is coupled to the piston of the cylinder RT (333RT), and the link RB (332RB) is connected to the other end of the tilt link 334. One end is hinged and the other end is coupled to the piston of cylinder RB (333RB).

  FIG. 19 is a diagram schematically showing a web continuous processing method according to the fourteenth embodiment of the present invention.

  The present invention provides a web continuous processing method in which processing is performed while adjusting the tension of the web W using the tension adjusting device 300 as described above. The web continuous processing method includes a step of adjusting the tension of the web W using the tension adjusting device 300 and a step of processing the web W whose tension is adjusted. The treatment includes at least one of forming, cutting, polishing, printing, coating, cleaning, and inspection of the web W. The web continuous processing method is preferably performed in a roll-to-roll or roll-to-sheet process. FIG. 19 shows a continuous cleaning and inspection method for the web W. Here, the processing of the web W means cleaning and inspection.

  The web W and the protective film are unwound from the unwinding roller 715. The protective film is wound around the protective film winding roller 716. The tension of the web W is adjusted by the tension adjusting device 300 and the web W is conveyed by the conveying unit 100. The web W is cleaned by the cleaning unit 800) and inspected by the inspection unit 900. Thereafter, the film is wound around a winding roller 717. At this time, the protective film supplied from the protective film unwinding roller 718 is taken up together.

Claims (13)

Including a dancer that applies force to the web to adjust the tension of the web;
The dancer includes a first ultrasonic vibration unit,
The first ultrasonic vibration section ultrasonically vibrates, applies a repulsive force due to the ultrasonic vibration to the web, and applies the force to the web in a non-contact state.   The tension adjusting device according to claim 1, wherein the web is thin glass.   2. The tension adjustment according to claim 1, wherein an outer surface of the first ultrasonic vibration part forms a circle, or a portion facing the web forms an open curve along a longitudinal direction of the web. apparatus. The tension adjusting device includes a support portion that supports the web in a fixed position,
The support part includes a second ultrasonic vibration part,
The first ultrasonic vibration unit applies a repulsive force to the first surface of the web,
The second ultrasonic vibration unit vibrates ultrasonically, and adds a repulsive force due to the ultrasonic vibration to the second surface which is the back surface of the first surface, and supports the web in a non-contact state. The tension adjusting device according to claim 1. The tension adjusting device further includes a spring;
The tension adjusting device according to claim 1, wherein one end of the spring is coupled to the dancer and the other end is coupled to a fixed point. The tension adjusting device further includes a link;
The tension adjusting device according to claim 1, wherein one end of the link is hinged to the dancer and the other end is hinged to a fixed point. The tension adjusting device further includes a link;
The tension adjusting device according to claim 1, wherein one end of the link is coupled to the dancer and the other end is coupled to a piston of a cylinder. The tension adjusting device further includes a link T and a link B respectively coupled to the dancer from opposite directions toward both sides of the web,
The link T has one end coupled to the dancer and the other end coupled to the piston of the cylinder T.
2. The tension adjusting device according to claim 1, wherein one end of the link B is coupled to the dancer and the other end is coupled to a piston of the cylinder B. 3. The tension adjusting device further includes a link L and a tilt link hinged to both ends of the dancer in the width direction along the width direction of the web, and a link R hinged to the tilt link,
The link L has one end hinged to the dancer and the other end coupled to the piston of the cylinder L,
The tilt link is hinged at one end to the dancer,
2. The tension adjusting device according to claim 1, wherein one end of the link R is hinge-coupled to the other end of the tilt link, and the other end is coupled to a piston of the cylinder R. 3. The tension adjusting device includes:
A link LT and a link LB hinged to one end in the width direction of the dancer along the width direction of the web and hinged to one end in the width direction of the dancer from opposite directions toward both sides of the web; ,
A tilt link hinged to the other end in the width direction of the dancer;
A link RT and a link RB hinged to the tilt link;
One end of the link LT is hinged to one end of the dancer in the width direction, the other end is coupled to the piston of the cylinder LT,
One end of the link LB is hinged to one end of the dancer in the width direction, and the other end is coupled to the piston of the cylinder LB.
The tilt link is hinged at one end to the other end in the width direction of the dancer,
The link RT has one end hinged to the other end of the tilt link and the other end connected to the piston of the cylinder RT.
2. The tension adjusting device according to claim 1, wherein one end of the link RB is hinge-coupled to the other end of the tilt link, and the other end is coupled to a piston of the cylinder RB. Adjusting the tension of the web using the tension adjusting device of claim 1;
Treating the web with adjusted tension, and a continuous web processing method.   The web continuous processing method according to claim 11, wherein the processing includes at least one of forming, cutting, polishing, printing, coating, cleaning, and inspection of the web.   The web continuous processing method according to claim 11, wherein the web continuous processing method is performed in a roll-to-roll or roll-to-sheet process.

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