JP6265926B2 - Web winding method - Google Patents

Description

  The present invention relates to a web winding method, and more particularly to the exclusion of entrained air.

  In a web production line in which a film is produced or a produced film is subjected to a treatment such as coating and drying, the web is continuously wound around a winding core from a winding device provided on the downstream side. The wound web is stored and transported in the form of a web roll.

  Generally, when a web is continuously wound around a winding core, air may be wound together with the web. This entrained air escapes from the web roll, and there is a problem that the surface of the web roll buckles and sinks. In particular, a thin web has a low rigidity, so that buckling is likely to occur, and this problem has become apparent.

  In order to solve the problem caused by the entrained air, a method of eliminating the entrained air when winding the web has been proposed. Patent Document 1 discloses a method of eliminating entrained air by blowing air from an air nozzle maintained at a constant distance from the web when the web is wound around a core in a turret type web winding device. Has been. In Patent Document 2, in a turret type web winding apparatus, when winding a web around a core, a method is used in which air is blown from the air nozzle to the web at a certain distance from the web, and the air nozzle is swung together with the turret. Is disclosed. Patent Document 3 discloses a method of eliminating entrainment air by pressing a lion roll against a web when the web is wound around a core.

JP 59-207346 A Japanese Patent No. 5238828 JP 2002-220143 A

  However, the method of Patent Document 1 requires an air nozzle moving device for maintaining the distance between the air nozzle and the web. Further, since the distance between the air nozzle and the web depends on the mechanical accuracy of the moving device, there is a concern that the air nozzle and the web come into contact with each other. Further, in order to turn the turret when switching from the old winding core to the new winding core, it is necessary to retract the air nozzle from the turning trajectory of the turret. Therefore, after retracting the air nozzle, there is a problem that the entrained air cannot be excluded until the web wound around the old core is cut.

  In the method of Patent Document 2, it is not necessary to retract the air nozzle from the turning trajectory of the turret, but an air nozzle moving device is required to maintain the distance between the air nozzle and the web. Similar to Patent Document 1, there is a concern that the air nozzle and the web come into contact with each other.

  In the method of Patent Document 3, when the web has a thickness distribution, or when knurling (knurling) processing is applied to both ends in the width direction of the web, a gap is formed between the web and the lion roll due to unevenness on the surface of the web. There is a concern that it will occur and the exclusion of the entrained air will be insufficient.

  This invention is made | formed in view of such a situation, and it aims at providing the winding method of the web which can exclude the entrainment air at the time of winding up a web with a comparatively simple structure.

  The web winding method according to the present invention includes a turret capable of turning about a turning shaft, a plurality of winding shafts attached to the turret, and a nozzle unit provided corresponding to each of the plurality of winding shafts. An air nozzle unit attached to the nozzle unit arm, the air nozzle unit including an air nozzle disposed in the width direction of the web and having an air outlet for blowing air to the web, and edge rollers provided at both ends of the air nozzle; A step of preparing a web winding device having: a step of winding a web around one winding shaft of a plurality of winding shafts, and an air nozzle unit for the web wound on the winding shaft , Excluding the area where both ends of the web in the width direction are pressed by the edge roller and pressed by the edge roller in the width direction of the web And a step of blowing air from the air nozzle in the region.

  Preferably, the distance between the air outlet of the air nozzle and the web is 1 mm to 50 mm.

  Preferably, the step of preparing the web winding device includes changing the air nozzle unit to the nozzle unit arm according to the width of the web.

  Preferably, a load adjusting mechanism that adjusts the pressing load of the edge roller is attached to the web winding device, and the nozzle unit arm, the air nozzle unit, and the load adjusting mechanism rotate together with the turret.

  Preferably, the edge roller is a driven rotation roller.

  Preferably, the edge roller includes an oil-free bearing therein, and the edge roller is rotatably supported.

  Preferably, the air pressure blown from the air outlet is in the range of 5 to 1000 kPa.

  Preferably, the rotary joint is provided with a rotary joint that rotatably connects an air pipe communicated with an air supply source.

  The web winding method according to the present invention includes a step of winding a web on a winding shaft, and an air outlet for blowing air to the web arranged in the width direction of the web with respect to the web wound on the winding shaft. An air nozzle unit including an air nozzle having an air nozzle and edge rollers provided at both ends of the air nozzle, and presses both end portions in the width direction of the web with the edge roller, and excludes a region pressed by the edge roller in the width direction of the web Spraying air from the air nozzle onto the region.

  Preferably, the length of the web wound around the winding shaft is 1200 m or more.

  Preferably, the web has a thickness of 5 μm to 400 μm.

  Preferably, knurling is applied to both ends in the width direction of the web.

  Preferably, the air blowing angle blown from the air nozzle to the web is an angle formed by a straight line connecting the air blowing outlet and the winding shaft and the air blowing direction, and the blowing angle is from 0 ° to the web. It is a range of 45 ° on the upstream side in the transport direction.

  According to the present invention, the entrainment air when winding the web can be eliminated with a relatively simple configuration.

Conceptual diagram of the web winding device incorporated into the film production line Air nozzle unit perspective view Plan view of the air nozzle unit Explanatory drawing explaining the web winding method Explanatory drawing explaining the web winding method The perspective view of the air nozzle unit of another aspect Conceptual diagram of another web winding device Explanatory drawing explaining the spray angle of the air sprayed on a web from an air nozzle

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention is illustrated by the following preferred embodiments. Changes can be made by many techniques without departing from the scope of the present invention, and other embodiments than the present embodiment can be utilized. Accordingly, all modifications within the scope of the present invention are included in the claims.

  Here, in the drawing, portions indicated by the same symbols are similar elements having similar functions. In addition, in the present specification, when a numerical range is expressed using “˜”, upper and lower numerical values indicated by “˜” are also included in the numerical range.

  Hereinafter, the web winding method of the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a conceptual diagram in which a turret type web winding device is incorporated in a production line on the downstream side. FIG. 2 is a perspective view of the air nozzle unit, FIG. 2 (A) shows a state before winding the web, and FIG. 2 (B) shows a state where the web is being wound.

  As shown in FIG. 1, the web W fed out from the production line 10 is conveyed while being guided by the guide roller 16 along the conveyance direction MD. The web W is wound around the turret type web winding device 20 via the web winding device 12. The web W is wound up in a roll shape by the web winding device 20 to be in the form of a web roll WR.

  The production line 10 is a film production line that employs a solution casting method in which a dope obtained by dissolving or dispersing a raw material resin in a solvent is cast on a support, and a molten resin obtained by melting the raw material resin with an extruder. A film production line using a melt film-forming method that extrudes in a thin film form from a die onto a cooling drum, or a functional film production line that gives a function by applying a coating liquid to the produced film and drying it. Can be mentioned. However, the production line 10 is not limited to the exemplified production line.

  The guide roller 16 is a roller for guiding the web W, and a driven rotation roller, a driving rotation roller, or the like can be used as the guide roller 16. The driven rotating roller is a roller that does not have a driving source and can freely rotate freely around the central axis. The driving rotating roller is a roller that actively rotates around the central axis by a driving source such as a motor. . The guide roller 16 is not limited to these.

  The web winding device 20 of this embodiment will be described later, but a general turret type web winding device rotates a plurality of winding shafts that respectively support a plurality of winding cores for winding the web. The turret is supported by a rotating turret, and the turret is rotated to switch the winding core (full winding core) from an empty winding core to continuously wind the web. The plurality of winding shafts basically move on the same locus.

  A web rewinding device 12 is disposed in proximity to the web winding device 20. The web rewinding device performs cutting of a web wound around a fully wound core and rewinding that rewinds the cut web being transported to an empty core. The web rewinding device 12 will be described later.

  As shown in FIGS. 1 and 2, the web winding device 20 according to the present embodiment includes a gantry 22, a frame main body 24 provided on the gantry 22, and a pivot shaft 26 that is rotatably attached to the frame main body 24. And a turret arm 28 supported by the turning shaft 26 and capable of turning about the turning shaft 26.

  The turret means a mechanism that can be rotated around a pivot axis. In the present embodiment, an arm-shaped turret arm 28 is illustrated as an example of the turret. However, the present invention is not limited to this, and a disk-shaped turret disk can be used.

  The turning shaft 26 is connected to a rotation drive source (not shown). The turret arm 28 is turned by the rotation of the turning shaft 26.

  At both ends of the turret arm 28, winding shafts 30 that are perpendicular to the turret arm 28 and parallel to the pivot shaft 26 are provided. A winding core 32 is detachably attached to each winding shaft 30.

  Since the winding shafts 30 are provided at both ends of the turret arm 28, the web winding device 20 of this embodiment constitutes a two-axis turret type web winding device. The winding shaft 30 may be at least two or more axes.

  The winding shaft 30 is connected to a rotational drive source (not shown). Since the winding core 32 rotates integrally with the winding shaft 30 by the rotation of the winding shaft 30, the web W can be wound around the winding core 32. The winding core 32 has a hollow cylindrical shape for insertion into the winding shaft 30. The core 32 is made of a material such as FRP (Fiber Reinforced Plastics), aluminum, or paper.

  Note that the web W can be directly wound around the winding shaft 30 without using the winding core 32. Therefore, winding the web W with the winding shaft 30 means that the web W is directly wound around the winding shaft 30, and the winding core 32 is attached to the winding shaft 30, and the web W is wound around the winding core 32. It is a concept that includes both cases.

  Further, the guide arm 34 is provided integrally with the turret arm 28 at a position orthogonal to the turret arm 28 and symmetrical with the turning shaft 26. As a whole, the guide arm 34 and the turret arm 28 are arranged in a cross shape around the turning shaft 26. Therefore, the guide arm 34 is configured to be able to turn around the turning shaft 26. A guide roller 36 is attached to both ends of the guide arm 34 in parallel with the take-up shaft 30.

  The web rewinding device 12 includes a rewinding drive control unit 14 that controls the rewinding operation of the web W. The web winding device 20 includes a winding drive control unit 40 that controls the winding operation of the web W. The control unit 42 controls the operations of the rewinding drive control unit 14 and the winding drive control unit 40.

  The web winding device 20 includes a nozzle unit arm 44 provided corresponding to each winding core 32 and an air nozzle unit 50 attached to the nozzle unit arm 44. The nozzle unit arm 44 is provided with a shaft 46. The shaft 46 is rotatably supported by a bearing 48 fixed to the gantry 22 in parallel to the turning shaft 26. The nozzle unit arm 44 can pivot about an axis 46.

  The shape and the like of the nozzle unit arm 44 are not limited as long as the air nozzle unit 50 can be held. The air nozzle unit 50 is attached to the tip side of the nozzle unit arm 44. The front end side means a side closer to the winding core 32 with respect to the shaft 46 of the nozzle unit arm 44, and includes the front end portion of the nozzle unit arm 44. The air nozzle unit 50 is preferably provided at the tip of the nozzle unit arm 44. This is because the movable range of the air nozzle unit 50 is increased.

  The web winding device 20 of the embodiment has two nozzle unit arms 44 and two air nozzle units 50 corresponding to the two cores 32.

  In the embodiment, the turret arm 28 and the nozzle unit arm 44 are attached to the frame main body 24, and the frame main body 24 turns the turning shaft 26. However, the present invention is not limited to this.

  As shown in FIGS. 1 and 2, the air nozzle unit 50 includes an air nozzle 52 and edge rollers 54 provided at both ends of the air nozzle 52. The both ends of the air nozzle 52 refer to two end portions viewed from the longitudinal direction of the air nozzle 52. As long as the edge roller 54 is provided at both ends of the air nozzle 52, the distance between the air nozzle 52 and the edge roller 54 is not limited.

  The air nozzle 52 is a device that can blow air of a predetermined direction and a predetermined strength, and is not particularly limited in shape. Examples of the air blown from the air nozzle 52 include air.

  As long as the edge roller 54 is a disk-shaped or cylindrical member that can rotate around an axis, there are no restrictions on the shape, shape, and the like.

  A shaft 56 projects from the air nozzle 52, and the shaft 56 is supported by the nozzle unit arm 44. The edge roller 54 is rotatably supported on the shaft 56. As the edge roller 54, a driven rotating roller, a driving rotating roller, or the like can be used. The edge roller 54 is preferably a driven rotating roller. Since the driven rotation roller does not have a drive source, the configuration can be simplified.

  The edge roller 54 is preferably provided with an oil-free bearing inside, and is supported on the shaft 56 so as to be rotatable by the oil-free bearing. Here, the oil-free bearing refers to a bearing that requires little or no oil supply, such as a ceramic bearing. By using the oil-free bearing, it is possible to prevent the web W from being soiled due to the oil.

  The air nozzle 52 is disposed in the width direction of the web W, and has an air outlet 58 that blows air onto the web W. If the air can be blown onto the web W, the shape and position of the air outlet 58 are not particularly limited. The shape of the air outlet 58 may be a slit shape (one long hole) along the air nozzle 52, or may be a shape in which a plurality of holes are provided along the air nozzle 52.

  One end of a plurality of air hoses 60 is connected to the surface of the air nozzle 52 opposite to the air outlet 58. The other ends of the plurality of air hoses 60 are connected to the pivot shaft 26 having a hollow inside. At one end of the turning shaft 26, one end of an air pipe 64 is connected via a rotary joint 62. The rotary joint 62 refers to a joint that fluidly connects the rotating part and the fixed part in a rotatable manner to supply fluid from the fixed part to the rotating part, and is also referred to as a rotary joint. As the rotary joint 62 of the present embodiment, a known rotary joint can be used. Since the other end of the air pipe 64 communicates with an air supply source (not shown), air can be supplied to the air pipe 64.

  By driving the air supply source, air is supplied from the air supply source to the air nozzle 52 via the air pipe 64, the turning shaft 26, and the air hose 60. Air supplied to the air nozzle 52 is ejected from the air outlet 58. The air nozzle 52 may be any nozzle that can eject air in a predetermined direction, and the shape thereof is not limited.

  A fan, blower, or compressor can be used as the air supply source. The compressed air can be supplied to the air nozzle 52 by pumping the air.

  An air cylinder 70 is attached to the web winding device 20 as a load adjusting mechanism in order to adjust the load when the edge roller 54 presses the web roll WR. The air cylinder 70 includes a cylinder body 70A and a piston rod 70B. A cylinder main body 70 </ b> A is attached to the turret arm 28. A piston rod 70 </ b> B is attached to the nozzle unit arm 44. By driving the air cylinder 70, the piston rod 70B moves forward or backward relative to the cylinder body 70A. Forward movement means movement away from the cylinder body 70A, and backward movement means movement toward the cylinder body 70A.

  By moving the piston rod 70B forward or backward, the posture of the nozzle unit arm 44 changes, so the load applied to the tip of the nozzle unit arm 44 changes. With this change in load, the load when the edge roller 54 presses the web roll WR can be adjusted. Although the air cylinder 70 has been described as an example of the load adjusting mechanism, the method is not limited as long as the load can be adjusted, and for example, a servo cylinder or the like can be used.

  Next, the exclusion of entrained air in the present embodiment will be described based on FIG. 2 and FIG. FIG. 2B shows a state where the web is being wound. As shown in FIG. 2B, the nozzle unit arm 44 to which the air nozzle unit 50 is attached is inclined toward the web roll WR with the shaft 46 as the center. The edge roller 54 presses both ends in the width direction of the web W wound up as the web roll WR. At both ends of the web W, the edge roller 54 is pressed by direct pressing, and entrainment air is eliminated.

  Further, air is blown from the air outlet 58 of the air nozzle 52 to the area on the web W excluding the area on the web W pressed by the edge roller 54. The web W is pressed in a non-contact manner by the air pressure, and the entrainment air is excluded.

  As described above, the entire area of the web W in the width direction is pressed by the air nozzle unit 50 and the entrained air is eliminated. The edge roller 54 is pressed at both ends of the web W, and the air from the air nozzle 52 presses the web W other than the area pressed by the edge roller 54.

  The air nozzle 52 is preferably disposed at a position where the distance L between the air outlet 58 and the web W is in the range of 1 to 50 mm. By setting it as this range, the contact between the air nozzle 52 and the web W can be prevented, and air can be efficiently blown from the air nozzle 52 onto the web W.

  The distance L between the air outlet 58 and the web W is determined when the edge rollers 54 attached to both ends of the air nozzle 52 press the web W, and the distance L is maintained until the web W is fully wound on the core 32. Is done. That is, the distance L is determined by the mechanical relationship between the edge roller 54 and the air nozzle 52. Therefore, the distance L between the air outlet 58 and the web W can be shortened to about 1 mm. Compared to the case where a conventional air nozzle moving device is used, in the embodiment, the distance L is determined by the mechanical relationship between the edge roller 54 and the air nozzle 52, so the accuracy of the distance L can be increased.

  The air nozzle unit 50 should just be arrange | positioned downstream with respect to the conveyance direction MD of the web W from the position where the web W contact | connects the winding core 32 or the web roll WR, ie, the so-called winding start position of the web W. In other words, the air nozzle unit 50 eliminates the entrained air with respect to the web W wound around the core 32.

  The air pressure blown to the web W from the air outlet 58 of the air nozzle 52 is preferably in the range of 5 to 1000 kPa, and more preferably in the range of 8 to 20 kPa. By setting the air pressure within the above range, entrained air can be eliminated. Note that the air pressure from the air outlet 58 can be measured by a fine differential pressure gauge (Manostar gauge: manufactured by Yamamoto Electric Co., Ltd.).

  FIG. 3 is a plan view showing the air nozzle unit 50. As shown in FIG. 3A, the edge rollers 54 are disposed at both ends of the web W in the width direction. Here, the end portion W1 in the width direction of the web W is an area that is discarded as an ear portion in a subsequent process, and means a portion other than the product area, and is generally within 50 mm inward in the width direction from the end of the web W. The range. However, it is not limited to this numerical range. The central portion W2 of the web W refers to a region that is a product area excluding the end portion W1. That is, in order to prevent the web W from being scratched, it is better not to make contact between the edge roller 54 and the web W as much as possible. The area of the web W in contact with the edge roller 54 of the air nozzle unit 50 is often cut off as an ear in a later process, and the edge roller 54 is only on the end W1 of the web W outside the effective product such as the ear. It is desirable to make contact.

  In the embodiment of FIG. 3A, the width of the edge roller 54 and the width of the end W1 of the web W are substantially the same. Therefore, the width of the central portion W2 of the web W and the width of the region W3 excluding the region pressed by the edge roller 54 are substantially the same. The area W3 excluding the area pressed by the edge roller 54 is an area on the web W that is not pressed by the edge roller 54 in the width direction of the web W, and is an area on the web W that faces the air nozzle 52. means.

  However, the width of the edge roller 54 and the width of the end W1 of the web W do not need to match. For example, in the aspect shown in FIG. 3B, the width of the edge roller 54 is narrower than the width of the end W1 of the web W. Therefore, the width of the central portion W2 of the web W does not match the width of the region W3 excluding the region pressed by the edge roller 54, and the width of the region W3 is wider than the width of the central portion W2 of the web W. From the air outlet 58 of the air nozzle 52, air flows into this region W3 (a region on the web W that is not pressed by the edge roller 54 in the width direction of the web W, and a region on the web W facing the air nozzle 52). Be sprayed.

  As shown in FIG. 3, a knurling N is applied to the end W1 of the web W. The knurling means that a minute uneven shape is formed by using a stamping roll and the thickness of both ends of the web W is substantially increased, and is also referred to as knurl. By providing the knurling, it is possible to prevent the occurrence of winding slip when wound on the web roll WR or after being wound.

  It is preferable to apply the air nozzle unit 50 of the present embodiment when winding the knurled web W. The knurled part is not a product area. Therefore, the edge roller 54 can be pressed against the knurling portion with a relatively high pressing force, and the entrained air can be more effectively eliminated. On the other hand, air is blown from the air nozzle 52 to the central portion W2 of the web W and pressed without contact, so that the entrained air can be effectively eliminated without damaging the central portion W2 of the web W. Since the distance L is made constant by pressing the edge roller 54, the distance L can be maintained with high accuracy even when the diameter of the web roll WR is increased.

  Next, a web winding method will be described with reference to FIGS. 4 and 5. For convenience of explanation, regarding the winding core 32, the winding core that first winds the web W is referred to as a first winding core 32A, and the winding cores are sequentially referred to as a second winding core 32B and a third winding core 32C. Further, it may be simply referred to as a core 32.

  As shown in FIG. 4A, a turret type web winding device 20 including an air nozzle unit 50 including an air nozzle 52 and an edge roller 54 is prepared. The web W is not wound around the first core 32A and the second core 32B.

  Next, as shown in FIG. 4B, the web W is conveyed from a production line (not shown) via a web rewinding device (not shown). The web W is wound around one first core 32A among the plurality of first cores 32A and second cores 32B. The winding of the web W is performed by rotating the winding shaft 30 with a driving source (not shown). Then, the web W wound around the first core 32 </ b> A is pressed by the air nozzle unit 50. At this time, as described above, both ends of the web W are pressed by the edge roller 54, and air is blown from the air outlet 58 of the air nozzle 52 to a region excluding the region pressed by the edge roller 54 (see FIG. 3). The air nozzle unit 50 eliminates entrained air.

  As the diameter of the web roll WR increases, the air nozzle unit 50 moves on the turning locus of the nozzle unit arm 44. The edge roller 54 is preferably always pressed against the web W (web roll WR) by the action of the air cylinder 70 and the nozzle unit arm 44. The pressing load is also adjusted by the air cylinder 70.

  The web W is continuously wound as it is, and when it is detected that the web roll WR is almost full, the web rewinding operation is started. As a method of detecting the state of the web roll WR, for example, a method of detecting from a measurement value of a sensor that detects the diameter of the web roll WR can be exemplified.

  Here, the web W means a flexible continuous belt-like member having a thin film thickness, and includes a resin film, paper, metal, resin-coated paper, or synthetic paper. Resin film materials include, for example, polyolefins such as polyethylene and polypropylene, vinyl polymers such as polyvinyl acetate, polyvinyl chloride and polystyrene, polyamides such as 6,6-nylon and 6-nylon, polyethylene terephthalate, polyethylene-2 Examples thereof include polyesters such as 6-naphthalate, cellulose acetates such as polycarbonate, cellulose triacetate, and cellulose diacetate. For example, the resin film may be provided with a function (for example, formation of a functional layer).

  The web W preferably has, for example, 5 μm to 400 μm. The web W having a thickness in this range can prevent buckling and the like from occurring particularly by eliminating the entrainment air.

  The length of the web W wound around the winding core 32 is preferably 1200 m or more. When the length of the web W wound around the winding core 32 is 1200 m or more, entrained air increases and buckling or the like is likely to occur. Therefore, it is preferable to exclude the entrained air.

  The length of the web W wound around the core 32 is preferably 100,000 m or less in consideration of facilities and the like.

  Next, as shown in FIG. 5C, when it is detected that the web roll WR is almost full, the web rewinding operation is started, and the turret arm 28 is rotated 180 ° around the turning shaft 26. Along with the turning, the first winding core 32A on which the web roll WR is formed turns 180 ° clockwise with respect to the turning shaft 26. Similarly, the second winding core 32B turns 180 ° clockwise with respect to the turning shaft 26 and is disposed at the winding position. As shown in FIG. 5C, the nozzle unit arm 44, the air nozzle unit 50, and the air cylinder 70 serving as a load adjusting mechanism rotate together with the turret arm 28 serving as a turret. Accordingly, the operation of retracting the nozzle unit arm 44, the air nozzle unit 50, and the air cylinder 70 from the web winding device 20 becomes unnecessary, and the web winding device 20 can be downsized.

  In the embodiment, since the web W is supported by the guide roller 36 attached to the guide arm 34, the web W can be prevented from coming into contact with the air nozzle unit 50 or the like.

  Next, when the first winding core 32A is fully wound, the web W wound around the first winding core 32A is cut by a web rewinding device (not shown). Then, the cut web W is wound around the second core 32B. As shown in FIG. 5D, the web W is wound around the second core 32B to form the web roll WR. On the other hand, the first winding core 32 </ b> A of the fully wound web roll WR is removed from the winding shaft 30, and the empty third winding core 32 </ b> C is attached to the winding shaft 30.

  By repeating the operations shown in FIGS. 4 and 5, the web W can be continuously wound while removing the entrained air.

  FIG. 6 is a perspective view of an air nozzle unit 50 according to another aspect. The air nozzle unit 50 of FIG. 6 is the same as the air nozzle unit 50 of FIG. However, the size of the air nozzle unit 50 in FIG. 6 (size of the air nozzle 52) and the length of the winding core 32 are the same as the size of the air nozzle unit 50 in FIG. 2 (size of the air nozzle 52) and the length of the winding core 32. It is different from the length.

  The web winding device of the embodiment can replace the air nozzle unit 50 with the nozzle unit arm 44 in accordance with the width of the web W to be wound. Similarly, the winding core 32 can be replaced with the winding shaft 30 according to the width of the web W to be wound. The web winding device can wind up a plurality of webs W having different widths.

  Although the turret type web winding device capable of continuous winding has been described, the present invention is not limited to this. It can also be applied to a single web winding device.

  FIG. 7 is a conceptual diagram of a single web winding device 100. The web winding device 100 includes a gantry 110, a winding shaft 130 that is rotatably supported by the gantry 110, a winding core 132 that is detachably attached to the winding shaft 130, and an air nozzle unit 50. Yes. As described above, the air nozzle unit 50 includes the air nozzle 52 and the edge rollers 54 provided at both ends of the air nozzle 52. The air nozzle unit 50 is urged toward the web roll WR by an urging device (not shown).

  The web W is wound around the winding core 132 to form a web roll WR. As described above, both ends of the web W are pressed by the edge roller 54 against the web W wound around the winding core 132. Further, air is blown from an air outlet 58 of the air nozzle 52 to a region (see FIG. 3) excluding a region pressed by the edge roller 54. The air nozzle 52 and the edge roller 54 eliminate the entrainment air when winding the web W.

  Next, the blowing angle of the air blown to the web W wound up from the air nozzle 52 will be described with reference to FIG. As shown in FIG. 8, the air blowing angle θ is an angle formed by a straight line SL connecting the air outlet 58 and the winding shafts 30 and 130 and the air blowing direction AD. The spray angle θ is preferably in the range of 45 ° from 0 ° to the upstream side in the conveyance direction MD of the web W, more preferably 5 ° to 40 °, and more preferably 15 ° to 30 °. By setting the air blowing angle θ within the above-described range, it is possible to suppress the fluttering of the web W.

  The blowing angle θ is 0 ° when the straight line SL and the air blowing direction AD coincide. Further, the upstream side in the conveyance direction MD of the web W means a case where it is located on the opposite side of the conveyance direction MD of the web W with respect to the straight line SL.

DESCRIPTION OF SYMBOLS 10 ... Production line, 12 ... Web rewinding device, 14 ... Rewinding drive control part, 16 ... Guide roller, 20 ... Web winding device, 22 ... Mount, 24 ... Bearing, 26 ... Turning axis, 28 ... Turret arm, DESCRIPTION OF SYMBOLS 30 ... Winding shaft, 32 ... Winding core, 32A ... 1st winding core, 32B ... 2nd winding core, 32C ... 3rd winding core, 34 ... Guide arm, 36 ... Guide roller, 40 ... Winding drive control part, DESCRIPTION OF SYMBOLS 42 ... Control part, 44 ... Nozzle unit arm, 46 ... Shaft, 48 ... Bearing, 50 ... Air nozzle unit, 52 ... Air nozzle, 54 ... Edge roller, 56 ... Shaft, 58 ... Air outlet, 60 ... Air hose, 62 ... Rotary Joint, 64 ... Air piping, 70 ... Air cylinder, 70A ... Cylinder body, 70B ... Piston rod, 100 ... Web winding device, 110 ... Mount, 130 ... Winding shaft, 132 Core

Claims (13)

A turret capable of turning around a turning axis, a plurality of winding shafts attached to the turret, a nozzle unit arm provided corresponding to each of the plurality of winding shafts, and attached to the nozzle unit arm An air nozzle unit, comprising: an air nozzle having an air outlet that is arranged in a width direction of the web and blows air to the web; and an air nozzle unit that includes edge rollers provided at both ends of the air nozzle. Preparing the device;
Winding the web around one winding shaft of the plurality of winding shafts;
With respect to the web wound on the winding shaft, the air nozzle unit presses both end portions in the width direction of the web with the edge roller, and is pressed by the edge roller in the width direction of the web. And a step of blowing air from the air nozzle to an area excluding the existing area.   The web winding method according to claim 1, wherein a distance between the air outlet of the air nozzle and the web is 1 mm to 50 mm.   The web winding method according to claim 1, wherein the step of preparing the web winding device includes changing the air nozzle unit to the nozzle unit arm according to a width of the web.   The load adjustment mechanism which adjusts the load of pressing of the edge roller is attached to the web winding device, and the nozzle unit arm, the air nozzle unit, and the load adjustment mechanism rotate together with the turret. The web winding method according to claim 3.   The web winding method according to any one of claims 1 to 4, wherein the edge roller is a driven rotating roller.   The web winding method according to claim 5, wherein the edge roller includes an oil-free bearing therein, and the edge roller is rotatably supported.   The method for winding a web according to any one of claims 1 to 6, wherein an air pressure blown from the air outlet is in a range of 5 to 1000 kPa.   The web winding method according to any one of claims 1 to 7, wherein a rotary joint that rotatably connects an air pipe communicating with an air supply source is provided on the swivel shaft. Winding the web around a winding shaft;
An air nozzle including an air nozzle having an air outlet that is arranged in the width direction of the web and blows air to the web with respect to the web wound on the winding shaft, and edge rollers provided at both ends of the air nozzle. And a step of blowing air from the air nozzle to a region excluding a region pressed by the edge roller by the unit with the edge roller and pressed by the edge roller in the width direction of the web. Winding method.   The web winding method according to any one of claims 1 to 9, wherein a length of the web wound around the winding shaft is 1200 m or more.   The web winding method according to claim 1, wherein the web has a thickness of 5 μm to 400 μm.   The web winding method according to any one of claims 1 to 11, wherein knurling is applied to both end portions in the width direction of the web.   The blowing angle of air blown from the air nozzle to the web is an angle formed by a straight line connecting the air blowing outlet and the winding shaft and the blowing direction of the air, and the blowing angle is from 0 °. The web winding method according to any one of claims 1 to 12, which is in a range of 45 ° upstream of the web conveyance direction.

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