JP2009234713A - Cloth guider with groove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that, though in wrinkle removers adapted to prevent the occurrence of wrinkles during winding of a web, a wrinkle remover of the type adapted to make no contact with the treatment surface of a web is suitably used, however, the web is charged under vacuum or a thin web is plastically deformed in the wrinkle removers of the prior art. <P>SOLUTION: In a three-roller type cloth guider having three rollers (13, 14 and 15), a continuous groove 17 is formed in a second roller 14, and a contact end 54 of the second roller 14 is arranged nearer the end of a web than contact ends 53 and 55 of first and third rollers, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cross guider for removing wrinkles when a web is transferred.

  In many cases, the web is supplied in the form of a roll called an original fabric obtained by winding a long material having a predetermined width around a winding core. And various processes are given while it is wound up by the winding roll which is a winding core from an original fabric. Such a web can be processed continuously, and when the processing is completed, a long product can be obtained. Therefore, it is used in various fields. There are films, paper, metal foil, and so on.

However, while the web can continuously produce long products, it is sequentially stacked on the take-up roll. There is a problem of end up. In particular, when the web is very thin, not all of the original fabric can be used.
Also, if the web running on the roller is tightly wrinkled, the web will be plastically deformed and cannot be made into a product, or even in the process of forming a thin film layer on the web surface like coating or vapor deposition There arises a problem that the film cannot be formed.

  Therefore, with respect to the running and winding of the web, a device that does not cause wrinkles has been conventionally devised.

  Patent Document 1 discloses a strip-like material wrinkle removal device in which a pair of rollers that rotate freely at both ends in the width direction of a web are provided in a plane C shape such that the downstream side in the running direction of the web expands. ing. In the present invention, the distance between the pair of rollers is fixed. The straightness is enhanced by being brought into contact with the C shape having a caster angle with respect to the traveling direction like a car tire from the top of the web. That is, wrinkles are removed by applying a force to open both ends of the web outward.

  Patent Document 2 discloses a film transfer device in which rollers similar to those in Patent Document 1 are disposed so as to be sandwiched from above and below the web. In the present invention, the pair of rollers nip the film from above and below the film in a C shape, and the force for spreading the web in the width direction becomes stronger.

  Patent Document 3 discloses a three-roller type cross guider in which two fixed rollers are disposed on the lower side of the web and one movable roller is disposed on the upper side of the web. The movable roller disposed on the upper side of the web is positioned between two fixed rollers. Thus, as the web travels, it first hits the lower fixed roller, then hits the upper movable roller, and again contacts the lower fixed roller. These three rollers are also arranged at both ends of the web, and are provided in a C shape so that the downstream side in the running direction of the web is expanded.

  In addition, like these prior arts, a roller that is in contact with both ends of the web and whose rotation axis is inclined from the film width direction and its fixed portion are referred to as a cross guider. The cross guider may be called a web wrinkle-stretching device.

  Also, as a measure to eliminate wrinkles on the web, in addition to the cross guider, a rubber grooved roller called a tentering roller is provided in the course of running the original film, and the original film is pulled in the width direction due to the elasticity of the rubber. In some cases, an arc-shaped rubber roller called a bow expander roller or a banana roller is provided while the original film is running, and the original film is pulled in the width direction.

JP 09-301583 A JP 2000-118815 A Japanese Utility Model Publication No. 50-128492

  Since the wrinkle removing means other than the cross guider contacts the entire surface of the web, it is effective for products that are not damaged by the contact. However, when an optical film used for liquid crystal panels or the like, a web with high scratch quality requirements, or a very fragile thin film is formed on the surface of the web, the wrinkle removing roller is in contact with the entire film surface. Must be avoided. This is because scratches may easily occur due to sliding with the roller.

  In order to improve the frictional force, the cross guider generally coats the surface of at least one roller with a rubber-like elastic body (hereinafter abbreviated as rubber) having rubber elasticity such as nitrile rubber or chloroprene rubber. In this case, the frictional electrification of the web and the roller is increased, and the end portion of the web in the wound state is brought into close contact with the web, thereby hindering the air flow from the end portion of the take-up roll. As a result, in winding in the atmosphere, a large amount of air remains between the web layers, so that interdigital lateral wrinkles and eccentricity of the winding roll occur. Further, in the winding in a vacuum such as a vapor deposition machine, the reduced pressure air remains between the web layers, so that the winding roll is crushed by the atmospheric pressure when the atmosphere is released, and vertical wrinkles and a wrinkled horizontal wrinkle are generated. Thus, when the frictional electrification of the web and the roller increases, there is a problem that the winding shape of the winding roll is deteriorated in the air or in the vacuum.

  When the rubber is not covered, a cross guider that does not nip as in Patent Documents 1 and 3 cannot obtain a sufficient frictional force, so that the effect of stretching the wrinkles of the web cannot be expected. In the cross guider, it is impossible to nip uniformly, and rotation failure due to one piece contact and web tear due to local pressure occur.

  Further, among the cross guiders, the type that nips from the top and bottom of the web as in Patent Document 2 causes the film to be deformed at the nip portion when the web is thin, and a wrinkled wrinkle is generated during winding.

  Even if it is the type which does not nip like patent document 1, if the thickness of a web is still thin, wrinkles cannot be removed very effectively. In the type of cross guider in which the web is applied from either the top or the bottom of the web, the roller rotates by the tension of the traveling web. However, when the web is thin, high tension is not applied during film running. Therefore, the roller cannot sufficiently contact.

  The non-nip type cross guider as in Patent Document 3 does not have the above-described problems. However, since the three rollers have the same length, the end of the movable roller on the upper side of the web travels without touching the fixed roller on the lower side of the film from the state where the web is pressed. Therefore, there is a problem that wrinkles are generated at the end of the movable roller.

  The present invention has been conceived in view of such problems. That is, it is possible to remove wrinkles without causing scratches, and the cross guider that does not cause deterioration of the winding shape due to charging of the web edge, and even if a thin web is wound, it is caused by deformation of the web edge. The object is to provide a cross guider that does not cause wrinkles.

In order to achieve the above object, according to the present invention, a pair of guides each having at least one roller are brought into contact with both ends of a traveling web at an angle at which the directions indicated by the rotation axes of the guide rollers cross each other. A cross guider
A cross guider is provided in which at least a pair of rollers among the rollers is covered with a rubber-like elastic body, and a surface of the rubber-like elastic body has a groove continuous in a rotation axis direction.

Further, according to another aspect of the present invention, the guides of the mutual guides are arranged at both ends of a web traveling on a pair of guides having first, second, and third rollers whose rotation axes are directed in the same direction. Contact so that the direction of the rotation axis of the roller crosses,
The second roller of each guide has a rubber-like elastic body coated on the surface of the roller, and a cross guider having a groove continuous in the rotation axis direction on the surface of the rubber-like elastic body is provided.

  According to a preferred aspect of the present invention, the first and third rollers are in contact with one surface of the web, the second roller is in contact with the other surface, and the second roller is a hug for the web. A cross guider whose angle is not less than 10 degrees and not more than 180 degrees is provided.

  According to a preferred aspect of the present invention, there is provided a cross guider in which the contact end of the second roller is located outside the web from the contact ends of the first and third rollers.

  According to a preferred embodiment of the present invention, there is provided a cross guider in which the diameter of the second roller gradually decreases from the film end toward the center.

  According to a preferred embodiment of the present invention, there is provided a cross guider in which the contact end of the second roller has a curvature.

  According to a preferred aspect of the present invention, there is provided a cross guider in which the groove has a spiral shape around the axis of the roller.

  According to another aspect of the present invention, there is provided a cross guider in which the groove is formed by a protrusion formed on the surface of the roller.

Further, according to another aspect of the present invention, a step of pulling out the web from the original fabric, a step of removing wrinkles of the web, a step of performing vapor deposition treatment on the web,
Removing wrinkles of the vapor-deposited web;
Winding the web that has passed through the cross guider,
A method for producing a vapor deposition web, comprising:
In at least one of the step of removing wrinkles before the vapor deposition treatment and the step of removing wrinkles before the step of winding the web, a method for producing a vapor deposition web using the cross guider is provided. .

  In the cross guider of the present invention, a groove is provided in a roller covered with rubber, and the roller does not come into contact with the web in the groove portion, so that charging does not occur. Therefore, the air flow at the end of the take-up roll is ensured, so that defects such as eccentricity, vertical wrinkles, and interdigital wrinkles of the take-up roll do not occur, and a good winding form can be obtained.

  In addition, since the three-roller type cross guider which is an embodiment of the present invention is a non-nip type, there is an effect that wrinkles due to deformation of the web can be prevented even when the web is thin. is there. In this way, the deterioration of the winding shape due to electrification and the occurrence of wrinkles at both ends due to deformation of the web do not require slitting the edge after passing through the cross guider, so a web having slit equipment such as a film forming machine or a slitter. It can be used not only for manufacturing machines and processing machines but also for web processing machines that do not have slit equipment such as offline coaters and vapor deposition machines.

  In addition, since the contact point between the middle roller and the web is outside the outer roller, the film does not hug the outer roller edge portion. Therefore, generation | occurrence | production of the wrinkle in the edge part of a web can be suppressed.

  FIG. 1 shows a configuration of a cross guider 1 according to an embodiment of the present invention. FIG. 1A is a plan view of the web running from above. FIG.1 (b) is the figure which looked at the part of the cross guider 1 from the rotating shaft direction of the roller. The web 3 travels from the original fabric toward the winding roll. The traveling direction is denoted by reference numeral 7.

  In the central part of the web 3, there is a processing part 4 being processed. The content of the treatment is not particularly limited, and examples thereof include a treatment such as applying a paint-like material or depositing a metal or a resin in a vacuum. The treated portion may be on one side of the web or on both sides. In the case where the treatment is vapor deposition, untreated portions 5 are often present at both ends other than the treated portion 4 of the web. This is because a mask is provided inside the web edge to protect the cooling can during vapor deposition.

  The cross guider 1 of the present invention includes at least one pair of guides 10. The guide is in contact with one end of the web and assists in running the web. Each guide has at least three rollers. The three rollers are supported in one piece by a roller fixing portion 11 to which one end of the rotating shaft is fixed. In FIG. 1A, only one roller fixing portion 11 is shown, and the other is omitted. The three rollers are referred to as a first roller 13, a second roller 14, and a third roller 15 from the upstream side of the film travel. The rotation shafts (13a, 14a, 15a) of the respective rollers are fixed in the same direction.

  FIG. 2 shows the relationship between the film and each roller of the guide. 2 (a) is a plan view seen from above, FIG. 2 (b) is a horizontal view seen from the rotation axis direction of the roller, and FIG. 2 (c) is seen from a direction perpendicular to the rotation axis of the roller. It is a horizontal view. The web is wound around the guide so that the first roller 13 and the third roller 15 are in contact with the same surface 3d of the web, and the second roller is in contact with the other surface 3u of the web. That is, the guide 10 contacts the web 3 so that both ends of the web 3 are sandwiched between the first and third rollers and the second roller.

  Here, the angle at which the film is wound around each roller is called a holding angle. There are a holding angle 20 of the first and third rollers and a holding angle 21 of the second roller. The holding angle can be adjusted by the distance between the rotation axes of the three rollers, the diameter of the three rollers, or the distance 24 between the rotation axis of the second roller and the plane formed by the rotation axes of the first and third rollers. . The diameters of the first, second, and third rollers are represented by reference numerals 33, 34, and 35.

  Therefore, the rotation shaft of the second roller is preferably fixed so that it can be displaced in the vertical direction from the plane formed by the rotation shafts of the first and third rollers.

  The holding angle 21 is preferably 10 degrees or more and 180 degrees or less, and more preferably 30 degrees or more and 90 degrees or less. If the hugging angle is too small, the force of pulling the film outward in the width direction is too weak to remove wrinkles. On the other hand, if it is too large, the resistance against running of the web will increase, which will cause wrinkles.

  Returning to FIG. 1, the guide 10 comes into contact with both ends of the web 3 so as to be sandwiched between the first and third rollers and the second roller. Each guide comes into contact with an angle at which the direction (40, 41) indicated by the rotation axis of the roller crosses. The crossing angle means that the directions indicated by the rotation axes of the rollers do not cross or become parallel. This is because the pulling force in the width direction of the web does not occur if the directions of the rotation axes of the rollers are parallel.

  Moreover, it can be said that the direction in which the directions indicated by the rotation axes of the rollers are inclined is an angle at which the rotation axes of the rollers are perpendicular to the running direction of the web. Further, if the direction perpendicular to the running direction of the web is the width direction of the web, it can be said that the rotation axis of the roller is inclined from the width direction of the web.

  The rollers of the guides are inclined in a letter C shape when viewed from the downstream side in the running direction of the web. Here, the direction of the roller means a direction (42, 43) perpendicular to the rotation axis of the roller. In other words, the rotation axis of the roller is inclined by an angle θ from the width direction of the web toward the downstream in the running direction of the web. The roller that idles with the inclination of the angle θ generates a force that pulls the end of the web outward in the width direction of the web. This force eliminates wrinkles on the film.

  The first roller 13 and the third roller 15 of the present invention are preferably formed of a conductive material to prevent charging. Specifically, a metal material such as aluminum, copper, iron, or zinc, or a resin material containing a conductive filler can be suitably used. The size is not particularly limited, but preferably has a small moment of inertia so as not to hinder the running of the thin web. Moreover, it is preferable that the surface is finished in a mirror surface so as not to be scratched.

  The second roller 14 of the present invention is coated with rubber, and various rubber materials such as nitrile rubber (NBR), chloroprene rubber (CR), silicone rubber (Q), etc. are preferably used. A rubber containing a conductive filler is more preferable for preventing discharge due to charging of the roller. For the same reason, the cored bar portion is preferably formed of the same material as the first and second rollers.

  FIG. 3 shows an enlarged view of the second roller 14. The roller is fixed to the roller fixing portion 11 by a rotating shaft 14a so as to be rotatable. The second roller of the cross guider of the present invention has a groove 17 continuous in the direction of the rotation axis. The continuous groove 17 refers to a state in which a groove traced from one end of the second roller is connected to the other end. As a specific example, this is a spiral groove. The number of grooves is not particularly limited. FIG. 3 shows a case where there are three grooves.

  By forming the continuous groove 17, a continuous portion that does not contact the web, that is, an uncharged portion is continuously formed on the web from the inside to the end of the web. A flow can be secured.

  The groove 17 is preferably formed in a direction opposite to the rotational direction 16 of the roller. This is because the formation of the web causes a force to stretch the web toward the end. In FIG. 3, the second roller is a view as seen from the upstream side in the running direction of the web, and the web runs from the left hand on the paper surface toward the right hand on the back of the paper surface.

  FIG. 4 shows another form of the second roller. There may be a plurality of “continuous grooves”, and they may intersect on the surface of the second roller, or a plurality of protrusions may be formed as shown in FIG. In the case of FIG. 4, the continuous groove is a valley portion 17 between the protrusions.

  Next, the length of each roller will be described with reference to FIG. 5A is a cross guider of the present invention, and FIG. 5B is a conventional three-roller type cross guider. The roller is in contact with the web during the hug. Therefore, the tip of the roller is called a contact end. The contact end 54 of the second roller of the guide of the cross guider of the present invention is closer to the end of the film than the contact ends 53 and 55 of the first and third rollers.

  As shown in FIG. 5B, when the first, second, and third rollers have the same length, the contact end portions 57 and 58 of the first roller and the second roller and the second roller and the third roller. The web is scratched or broken at the corners of the rollers, which are wrinkled.

  However, if the contact end 44 of the second roller is closer to the end of the web than the contact ends 43 and 45 of the first and third rollers as in the present invention, the web is continuously deformed, so that no damage or breakage occurs. . In this sense, a configuration may be employed in which a curvature is imparted to the contact end of the second roller, or the diameter of the second roller is gradually reduced toward the contact end.

  FIG. 6 shows such a second roller. FIG. 6A shows a second roller having a rounded contact end, and FIG. 6B shows a second roller having a diameter that decreases toward the contact end. The point which has each groove | channel 17 is the same as the case of the roller of FIG. By forming the second roller in such a shape, wrinkles are less likely to occur.

  The cross guider of the present invention described above is preferably used for a winding pass when a metal material is deposited on both sides of a thin web in a vacuum. This is because the double-side vapor deposited web cannot be subjected to scratch prevention means such as bringing the bow expander roller into contact with the non-deposition surface.

  In addition, a nip type cross guider according to another embodiment of the present invention shown in FIG. 9 can be suitably used for a web that has a large web thickness and is not likely to be deformed by a nip. The roller 90 corresponds to the first or third roll in the case of the cross guider described above, and is preferably made of a conductive material. The nip roller 91 is a grooved roller having a groove 17 on which the same rubber as the second roll of the cross guider described above is attached. Since the web 3 is thick and there is no risk of deformation, the web 3 can be nipped by the roller 90 and the nip roller 91 for use.

  FIG. 10 shows a single cross guider which is another embodiment of the present invention. In this case, the grooved roller 95 comes into contact with the web 3, and the web is caused to travel while stretching the wrinkles. Thus, the cross guider of the present invention has at least one grooved roller on one side of the web.

The cross guider of the present invention was compared with other wrinkle removing devices in a vacuum evaporation machine.
FIG. 7 shows the configuration of the vacuum evaporation machine. An original fabric 80 and a winding core portion 81 are disposed in the chamber. A cooling can 82 is installed between the original fabric 80 and the winding core portion 81, and a crucible 83 is installed below the cooling can 82. A vapor deposition material 84 is automatically supplied to the crucible 83 and heated to the melting temperature or higher by an electron gun. The vapor deposition material used as an example is aluminum.

  As the web, a PET (Polyethylene terephthalate) film having a thickness of 10 μm was used. The raw fabric width was 700 mm, the film feed rate was 250 m / min, and an aluminum deposited film of 20 nm was obtained. A 600 mm mask 87 is installed on the vapor deposition surface, and 50 mm at both ends of the web are untreated portions.

  The web is wound approximately 180 ° around the cooling can 82 from the original fabric 80 via the guide roller 85, and is wound around the winding core portion 81 again via the guide roller 86. A winding core made of ABS having a diameter of 167 mm was used.

  The wrinkle removing device 9 is disposed between the cooling can 82 and the winding core 81. As a wrinkle removing device, a bow expander roller, a nip type cross guider, a three roller type cross guider, and the cross guider of the present invention were compared.

  FIG. 8 shows each wrinkle removing device. FIG. 8A shows a bow expander roller. This is a curved rubber roller that is commonly used in film production equipment. It touches the entire surface of the film and stretches wrinkles while sliding.

  FIG. 8B shows a nip type cross guider. Commonly used as a cross guider. The wrinkles are stretched by rollers that are placed at both ends of the web and tilted in a square shape. FIG. 8 (b-2) is a side view. The nip type cross guider stretches the wrinkles with a roller between the front and back of the web.

  FIG. 8C shows a three-roller type cross guider. It has a shape close to the cross guider of the present invention. It is the cross guider demonstrated in FIG.5 (b).

  The evaluation was performed with respect to each wrinkle removing device, focusing on the winding shape of the winding core in a state where 6000 m was wound up and taken out into the atmosphere. Table 1 shows the results. The vertical axis shows the evaluation items, and the horizontal axis shows the wrinkle removing device. In the wrinkle removing apparatus, “present invention” represents the cross guider of the present invention. “Bow EXP”, “nipC / G”, and “3R / LC / G” represent a bow expander roller, a nip type cross guider, and a three-roller type cross guider, respectively.

  Items evaluated were scratches, edge wrinkles, and rolls. Scratches evaluated whether or not there was a scratch on the vapor deposition surface of the PET film surface. The scratches were of a thickness that could be visually confirmed and had a length of 0.3 mm or more. Regarding scratches, a film of about 50 m was drawn out in the vapor deposition portion, and it was examined whether or not there were any scratches between them.

  About the edge part wrinkle, it was evaluated whether the non-processed part of the web wound up by the winding roll had a wrinkle. Wrinkles entered and the rolled-up end was raised. In addition, even if it was not a wrinkle, a triangle was used when a line that could be visually confirmed entered.

  The roll shape was crossed by vertical or horizontal wrinkles that were crushed by atmospheric pressure when released to the atmosphere after the vapor deposition process.

  Referring to Table 1, the bow expander roller had many scratches because it contacted the entire vapor deposition surface. Since the other wrinkle removing devices did not contact the vapor-deposited surface, the scratches were all round including the cross guider of the present invention.

  Regarding the edge wrinkles, the bow expander roller, the three-roller cross guider was evaluated as a triangle, and the nip type cross guider was a cross. The bow expander roller had some linear wrinkles due to its structurally low end tension. Wrinkles entered at the contact end of the three-roller type cross guider and were wound on the take-up roll to form wrinkles at the ends. The nip type cross guider was raised with the white edge of the web. This is because the drag by the nip is too strong for the web thickness and the web is deformed and whitened. On the other hand, the cross guider of the present invention was round without the occurrence of wrinkles at the ends.

  Regarding the winding form, the nip type cross guider and the three-roller type cross guider generated a horizontal wrinkle and were flawed. These wrinkle removal devices charge the end of the film over its entire length, and air under reduced pressure caught between the film layers during winding is not discharged from the end, but is compressed at atmospheric pressure when released to the atmosphere, generating lateral wrinkles This is because. The bow expander roller did not generate lateral wrinkles because the charge amount at the end was low. In the cross guider of the present invention, no air wrinkles were generated because air was discharged from the non-charged portion by the groove.

  From the above results, the cross guider of the present invention is suitable as a wrinkle removing device capable of removing wrinkles in a vacuum without defects such as scratches, end wrinkles, and winding shapes.

  The present invention can be used for a processing apparatus having means for winding a web.

It is a figure which shows use of the cross guider of this invention. It is a figure which shows the detail of the guide of the cross guider of this invention. It is an enlarged view of a 2nd roller. It is a figure which illustrates other forms of the 2nd roller. It is a figure which shows the relationship between the three rollers which comprise a guide, and a web. It is a figure which illustrates the other form of the contact end of a 2nd roller. It is a figure which shows the structure of the vapor deposition apparatus of an Example. It is a figure which shows the wrinkle removal apparatus of a comparative example. It is a figure which illustrates the other form of this invention. It is a figure which illustrates the other form of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cross guider 10 Guide 11 Roller fixing | fixed part 13 1st roller 14 2nd roller 15 3rd roller 17 Groove of 2nd roller 40, 41 The direction which the rotating shaft of a roller points 42, 43 Direction of roller 90 Roller 91 Nip roller 92 Groove

Claims (9)

A cross guider for bringing a pair of guides each having at least one roller into contact with both ends of a traveling web at an angle at which the directions of the rotation axes of the rollers of the guides cross each other,
A cross guider in which at least a pair of rollers among the rollers is covered with a rubber-like elastic body, and the rubber-like elastic body has a groove continuous in a rotation axis direction. A pair of guides each having first, second, and third rollers whose rotation axes are directed in the same direction, and the directions of the rotation axes of the rollers of the guides at both ends of the traveling web are indicated by Contact at a crossing angle,
2. The cross guider according to claim 1, wherein the second roller of each guide has a rubber-like elastic body coated on a roller surface, and has a groove continuous in a rotation axis direction on the surface of the rubber-like elastic body. The first and third rollers are in contact with one surface of the web, the second roller is in contact with the other surface, and the holding angle of the second roller with respect to the web is 10 degrees or more and 180 degrees or less. The cross guider according to Item 2. 4. The cross guider according to claim 2, wherein a contact end of the second roller is outside the web from a contact end of the first and third rollers. 5. The cross guider according to any one of claims 2 to 4, wherein the diameter of the second roller is gradually reduced from the film end toward the center. The cross guider according to any one of claims 2 to 5, wherein a contact end of the second roller has a curvature. The cross guider according to any one of claims 1 to 6, wherein the groove has a spiral shape centering on an axis of the roller. The cross guider according to any one of claims 1 to 6, wherein the groove is formed by a protrusion formed on a surface of the roller. Pulling the web out of the web,
Removing the wrinkles of the web;
Applying vapor deposition to the web;
Removing wrinkles of the vapor-deposited web;
A method for producing a vapor-deposited web comprising a step of winding a web that has passed through the cross guider,
It was described in any one of Claims 1 thru | or 8 in the process of removing the wrinkles before the said vapor deposition process, and the process of removing wrinkles before the process of winding up the said web. The manufacturing method of the vapor deposition web using a cross guider.

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