JP2013086913A - Web stabilization device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a web stabilization device that expands and stably runs a web.SOLUTION: The web stabilization device has: four guide bars 12-18 which are arranged above and below end parts W2 and W3 of a web W, and arrange the axis direction in parallel to the running direction of the web W; and a rotation device 20 that rotates the four guide bars 12-18 so as to expand the web W.

Description

  The present invention relates to a web stabilizer for stably running a long web.

  Conventionally, in order to stretch the wrinkles generated on the web being conveyed, there has been proposed one in which a spreading device is arranged at the entrance of the drying device and inside the dryer (for example, see Patent Document 1).

  This spreading device is composed of a plurality of pressing rolls arranged in pairs on both ears of the web, and these pressing rolls have a rotation axis along the width direction of the web. It is arranged in a divergent shape toward the downstream side in the transport direction.

JP 2007-098186 A

  By the way, when the coating liquid is applied to both surfaces of the web, there are a case where the back surface is applied after the front surface of the web is applied, and a case where the front surface and the back surface of the web are applied simultaneously. In any case, in order to dry the coated surface after the final coating, the coated surface must be transported to a non-contact heat treatment apparatus (for example, a floating dryer) and dried.

  However, in a floating dryer, since the web is moved up and down like a sine wave and dried, the air vibration in the heat treatment chamber propagates through the web and may adversely affect the final coating process. In particular, the air vibration cannot be completely suppressed only by pressing the web with a pressing roll as in Patent Document 1, and when coating the front or back surface, the coating thickness does not become uniform due to this vibration. There was a problem.

  SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a web stabilization device that can stably run a web.

  The present invention includes four columnar guide bars arranged above and below each of a pair of left and right ears of a traveling web and having a rotation axis direction parallel to the traveling direction of the web, and the web Rotating means for rotating each of the four guide bars so as to spread the web, a web stabilizer.

  According to the present invention, since the four guide bars are used to run while pressing the web, the web can be run stably.

1 is an overall view of a coating system in Embodiment 1 of the present invention. It is a perspective view of the stabilizer of the state which omitted the upper holding member and the lower holding member in Embodiment 1. It is a top view of the stabilizer of the state which omitted the upper holding member and the lower holding member in Embodiment 1. It is the longitudinal cross-sectional view seen from the upstream of the stabilizer in the state which omitted the upper holding member and the lower holding member in Embodiment 1. It is a side view of the state which held the guide bar in Embodiment 1 with the upper holding member and the lower holding member. It is a top view of the state which held the guide bar in Embodiment 1 with the upper holding member and the lower holding member. It is a front view of the state which held the guide bar in Embodiment 1 with the upper holding member and the lower holding member. 3 is an enlarged side view of an upper right guide bar and a lower right guide bar in Embodiment 1. FIG. FIG. 10 is an enlarged side view of an upper right guide bar and a lower right guide bar in the second embodiment. 6 is a plan view of an upper holding member in Embodiment 3. FIG.

  Hereinafter, a stabilization device 10 for a web W according to an embodiment of the present invention will be described with reference to the drawings.

  A stabilizing device 10 for a web W according to Embodiment 1 of the present invention will be described with reference to FIGS.

(1) Configuration of Coating System 1 Before detailed description of the stabilizer 10, the coating system 1 to which the stabilizer 10 is attached will be described with reference to FIG. The coating system 1 is a system that coats a coating liquid such as a resin on both surfaces of a long web W such as a film, paper, metal foil, or cloth.

  The web W travels on the transport path at a constant travel speed V, and the coating system 1 applies a first die 2 that coats the surface of the web W onto the transport path and a back surface of the web W. It has the 2nd die | dye 3 which coats a liquid, and the heat processing apparatus 4 which heats the web W by which the coating liquid was coated on both surfaces in a floating state.

  The first die 2 coats the surface of the web W traveling by the backup roll 5 with a certain thickness. The web W whose surface is coated by the first die 2 reaches the second die 3 through the guide roll 6. The second die 3 applies a coating liquid to the back surface of the web W. The web W coated with the coating liquid on both sides is carried into the heat treatment chamber 7 of the heat treatment apparatus 4. Inside the heat treatment chamber 7, nozzles 8 are arranged in a zigzag pattern above and below the conveyance path of the web W, and the hot air blown from the nozzle 8 heats and dries both surfaces while the web W is floating in a sinusoidal shape. . Here, as shown in FIGS. 2 and 3, the coated portion of the web W is represented as W1, the uncoated left ear portion is represented as W2, and the uncoated right ear portion is represented as W3. .

  Thus, since the heat treatment apparatus 4 performs heat treatment by blowing hot air to the web W in a floating state, the vibration at that time may be transmitted to the coating portion of the second die 3. Therefore, in the present embodiment, the first stabilizer 10 is disposed between the second die 3 and the heat treatment apparatus 4, and the second stabilizer 10 is disposed between the guide roll 6 and the second die 3. Is arranged. Since the first stabilizer 10 and the second stabilizer 10 have the same structure, they will be described in detail below.

(2) Structure of Stabilizer 10 The structure of the stabilizer 10 will be described with reference to FIGS.

  The stabilizer 10 includes four guide bars 12-18, a rotating device 20 that rotates the four guide bars 12-18, and an upper holding member 32 that rotatably holds the four guide bars 12-18, respectively. And a lower holding member 34.

(2-1) Four guide bars 12-18
First, the structure of the four guide bars 12 to 18 will be described.

  2 to 4, the first cylindrical guide bar 12 is disposed above the left ear W2 of the web W, and the axial direction of the guide bar 12 is parallel to the running direction of the web W. It is arranged. The second cylindrical guide bar 14 is disposed below the left ear portion W2 of the web W, and the axial direction of the guide bar 14 is disposed in parallel with the traveling direction of the web W. As for the guide bar 12 distribute | arranged above the left ear | edge part W2 of the web W, the spiral protrusion 22 protrudes on the flat surrounding surface 21. As shown in FIG. The direction in which the spiral ridge 22 is formed is such that the web W is spread leftward when the guide bar 12 is rotated in the clockwise direction in FIGS. 2 and 4. Also, a spiral protrusion 22 is formed on the flat peripheral surface 21 of the guide bar 14, and the direction in which the spiral protrusion 22 is provided rotates the guide bar 14 counterclockwise in FIGS. In this case, the ridge 22 is formed in the direction in which the web W is expanded to the left. The upper and lower guide bars 12 and 14 sandwich the left ear portion W2 of the web W.

  The third cylindrical guide bar 16 is disposed above the right ear W3 of the web W, and the axial direction of the guide bar 16 is disposed in parallel with the traveling direction of the web W. The fourth cylindrical guide bar 18 is arranged below the right ear W3, and the axial direction of the guide bar 12 is arranged in parallel with the running direction of the web W. As shown in FIG. 8, a spiral protrusion 22 is also formed on the flat peripheral surface 21 of the upper right guide bar 16, and the guide bar 16 is rotated counterclockwise in FIGS. 2 and 4. In addition, the ridge 22 is formed in the direction in which the web W is expanded to the right. A spiral protrusion 22 is also formed on the flat peripheral surface 21 of the lower right guide bar 18, and when the guide bar 18 is rotated in the clockwise direction in FIGS. 2 and 4, the web W is moved to the right. The protrusions 22 are formed in the direction of spreading. The upper and lower guide bars 16 and 18 sandwich the right ear portion W3 of the web W.

  That is, the upper left guide bar 12 and the upper right guide bar 16 are parallel, and the lower left guide bar 14 and the lower right guide bar 18 are parallel. Further, the interval between the protrusions 22 is determined by the diameter D of the guide bar 12 and the traveling speed V. When the inclination angle of the protrusions 22 is 45 °, the interval between the protrusions 22 is πD. The interval between the protrusions 22 of the other guide bars 14, 16, 18 is the same. Furthermore, as a material of the guide bars 12-18, it forms with a metal or resin.

(2-2) Rotating device 20
Next, the structure of the rotating device 20 will be described.

  The rotating device 20 includes a pair of left and right magnetic gears 24 and 25, and a motor 26. As shown in FIGS. 4 and 5, magnetic gears 24 and 24 are provided at both ends of the left guide bars 12 and 14, respectively. A magnetic gear 25 is attached to the output shaft of the motor 26. Magnetic gears 24 and 24 are provided at both ends of the right guide bars 16 and 18, and a magnetic gear 25 is attached to the output shaft of the motor 26. The “magnetic gear” is a non-contact type as disclosed in, for example, Japanese Patent Application Laid-Open No. 2005-114162 and Japanese Patent Application Laid-Open No. 2005-114163, and is magnetically attracted and magnetically engaged with each other for rotation. Rotating device that can. As a result, as shown in FIG. 4, when the magnetic gear 25 attached to the output shaft of the left motor 26 rotates, the magnetic gear 24 of the guide bar 14 that is non-contact and magnetically meshed rotates. As a result, the guide bar 14 rotates counterclockwise. When the magnetic gear 24 of the guide bar 14 rotates, the magnetic gear 24 of the guide bar 12 that is not in contact with and magnetically meshed with the magnetic gear 24 rotates, and the guide bar 12 rotates in the clockwise direction. Rotate in sync with 14.

  Similarly, the right guide bar 16 and the guide bar 18 are rotated synchronously by the magnetic gears 24 and 25 and the motor 26. Further, the left motor 26 and the right motor 26 are rotated synchronously so as to be spread symmetrically.

  Since the upper and lower magnetic gears 24 and 24 are not in contact with each other by such a rotating device 20, the web W can travel between the guide bar 12 and the guide bar 14, and between the guide bar 16 and the guide bar 18. The web W can run in the meantime.

(2-3) Upper holding member 32 and lower holding member 34
Next, the structure of the upper holding member 32 and the lower holding member 34 that hold the four guide bars 12 to 18 will be described with reference to FIGS.

  The upper left guide bar 12 and the upper right guide bar 16 are held by an upper holding member 32. The lower left guide bar 14 and the lower right guide bar 18 are held by the lower holding member 34.

  As shown in FIGS. 5 to 7, the upper holding member 32 is formed in a frame shape by a pair of left and right horizontal frames 36 and 36 and a pair of front and rear horizontal frames 38 and 38, and includes four pieces in the vertical direction from each corner. The vertical frame 40 protrudes downward. The pair of left and right horizontal frames 36 and 36 are disposed horizontally along the running direction of the web W, and the horizontal frames 38 and 38 are respectively disposed at the front end and the rear end of the pair of left and right horizontal frames 36 and 36. It is stretched horizontally.

  Bearings 30 and 30 are built in the pair of front and rear vertical frames 40 and 40 located on the left side, and rotatably support the rotating shafts 28 and 28 protruding from both ends of the guide bar 12. As shown in FIG. 8, bearings 30 and 30 are also incorporated in the vertical frames 40 and 40 on the right side, respectively, and rotatably support the rotary shafts 28 and 28 protruding from both ends of the guide bars 16 and 18.

  Similarly, the lower holding member 34 has a pair of left and right horizontal frames 42 and 42 and a pair of front and rear horizontal frames 44 and 44, and a vertical frame 46 protrudes upward from each corner. Each vertical frame 46 incorporates a bearing 30 and rotatably supports the rotating shaft 28 of the lower guide bar 14 and the rotating shaft 28 of the guide bar 18.

  With such a holding structure, the four guide bars 12 to 18 can be rotatably held without being obstructed by the running web W.

(3) Operation State of Stabilizer 10 Next, the operation state of the stabilizer 10 will be described with reference to FIG.

  The web W is passed between the four guide bars 12 to 18 located above and below the both ears W2 and W3 of the web W. At this time, since the upper and lower magnetic gears 24 and 24 are not in contact with each other, the web W can travel between the guide bar 12 and the guide bar 14, and the web W can be moved between the guide bar 16 and the guide bar 18. Can run.

  Next, each of the guide bars 12 to 18 rotates in the direction in which the web W is spread, and causes the web W to travel in the traveling direction. The tip surface of the ridge 22 of the upper left guide bar 12 and the tip surface of the ridge 22 of the lower left guide bar 14 come into contact with the web W. Further, the protrusion 22 of the upper right guide bar 16 and the protrusion 22 of the lower right guide bar 18 come into contact with the web W. At this time, the rotation directions of the guide bar 12 and the guide bar 14 are opposite, and the rotation directions of the guide bar 16 and the guide bar 18 are also opposite. Further, the guide bar 12 and the guide bar 16 are rotated so that the directions of rotation are opposite. As a result, the two guide bars 12 and 16 and the guide bars 14 and 18 are opposed to the web W in the width direction, and both ends of the web W are pulled together, and a tension T is applied in the width direction of the web W. It becomes. The web W traveling at the traveling speed V is spread by the resultant force F of the force generated by the tension T and the traveling speed V.

  In addition, since both ears W2 and W3 of the web W are sandwiched between the guide bars 12 and 14 and the guide bars 16 and 18, respectively, even if the web W vibrates by the heat treatment apparatus 4, the web W is stabilized. The coating liquid can be stably applied to the lower surface of the web W by the second die 3.

(4) Effect According to the stabilizer 10 of the present embodiment, the guide W is not only expanded by the four guide bars 12 to 18, but also the guide whose axial direction is arranged in parallel with the traveling direction of the web W. The web W is stably conveyed by being sandwiched between the bars 12-18. In particular, since the web W is sandwiched between the two upper and lower guide bars 12 and 14 and the guide bars 16 and 18, and the tension T in the width direction is generated by the protrusions 22, the web W can be stabilized.

  Since the upper and lower magnetic gears 24 and 24 are not in contact with each other, the web W can travel between the guide bar 12 and the guide bar 14, and the web W travels between the guide bar 16 and the guide bar 18. it can. In addition, the guide bar 12 and the guide bar 14 rotate synchronously, and the guide bar 16 and the guide bar 18 also rotate synchronously, so that only one surface of the web W is not pulled. Furthermore, since the left motor 26 and the right motor 26 are rotated synchronously, they can be spread symmetrically.

  Further, if the spiral protrusion 22 is used, the contact area with the web W is small, so that the web W is not damaged, and the web W can be stably traveled and spread reliably.

  Further, since the four guide bars 12 to 18 are in contact with both ears W2 and W3 of the web W, they do not come into contact with the coating portion W1.

  In the present embodiment, the first stabilizer 10 is disposed between the second die 3 and the heat treatment apparatus 4, and the second stabilizer 10 is disposed between the guide roll 6 and the second die 3. Therefore, the web W can be run more stably.

  Next, the stabilizer 10 of Embodiment 2 is demonstrated based on FIG.

  The difference between the present embodiment and the stabilizer 10 of the first embodiment resides in a lower left guide bar 14 and a lower right guide bar 18 disposed on the lower side of the web W. In the first embodiment, the protrusions 22 are provided on the guide bar 14 and the guide bar 18, but in the present embodiment, as shown in FIG.

  Even in this embodiment, the left ear W2 of the web W is sandwiched between the guide bar 12 having the protrusion 22 and the guide bar 14 of the flat peripheral surface 21, and the right ear W3 also has the protrusion 22. 16 and the guide bar 18 between the flat peripheral surface 21 and the web W can travel while being spread stably.

  The peripheral surfaces 21 of the upper two guide bars 12 and 16 may be flat, and the protrusions 22 may be spirally formed on the peripheral surfaces 21 of the lower two guide bars 14 and 18.

  Further, all the peripheral surfaces 21 of the four guide bars 12 to 18 may be flat.

  Next, the stabilizer 10 of Embodiment 3 is demonstrated based on FIG.

  In the present embodiment, adjustment members 48 are provided at the center of the pair of front and rear horizontal frames 38, 38 of the upper holding member 32. By these adjusting members 48, the distance between the upper guide bar 12 and the guide bar 16 can be adjusted. Similarly, the horizontal frames 44, 44 of the lower holding member 34 are also provided with adjusting members 48, 48 so that the distance between the upper guide bar 14 and the guide bar 18 can be adjusted.

  Accordingly, even if the width of the web W to be coated is changed, the distance L between the guide bars 12 and 16 and the guide bars 14 and 18 can be changed by adjusting the adjusting member 48. Even if the width of is changed.

Example of change

  In the above embodiment, the surface of the web W is coated with the first die 2 and then the lower surface of the web W is coated with the second die 3. However, the present invention is not limited to this, and the web W is coated with the first die 2. The lower surface of the web W may be coated, and then both surfaces of the web W may be coated with the second die 3. Moreover, you may apply simultaneously.

  In the above embodiment, the die is used as the coating means. However, the present invention is not limited to this, and coating may be performed with a coating roller, a coating nozzle using a capillary gap, or a lip coater type coating apparatus.

  Moreover, in the said embodiment, although the non-contact-type magnetic gear 24 was used as the rotation apparatus 20, it is not restricted to this, You may use another rotation apparatus.

  Moreover, in the said embodiment, although the stabilization apparatus 10 was provided on the conveyance path where the web W drive | works horizontally, not only this but the stabilization apparatus 10 may be provided in the state where the conveyance path inclined.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Stabilizer, 12-18 ... Guide bar, 20 ... Rotating device, 22 ... Projection, 24 ... Magnetic gear, 26 ... Motor, 32 ... Upper holding member 34 ... Upper holding member, 48 ... Adjusting member

Claims (7)

Four columnar guide bars arranged above and below each of the pair of left and right ears of the traveling web and having a rotation axis direction parallel to the traveling direction of the web,
Rotating means for rotating each of the four guide bars so as to spread the web,
A web stabilizer characterized by comprising: A protrusion is formed in a spiral shape on the peripheral surface of the pair of left and right guide bars arranged above the web,
The web between the upper and lower guide bars travels while being spread by contacting the ridges of the rotating guide bar,
The web stabilizer according to claim 1, wherein: A protrusion is also formed in a spiral shape on the peripheral surfaces of the pair of left and right guide bars arranged below the web,
The web between the upper and lower guide bars travels while being spread by contacting the ridges of the rotating guide bar,
The web stabilizer according to claim 1 or 2, wherein the web stabilizer is provided. The peripheral surfaces of the pair of left and right guide bars arranged above or below the web are formed flat,
The web between the upper and lower guide bars travels while being spread by contacting with the flat surface of the rotating guide bar,
The web stabilizer according to any one of claims 1 to 3, wherein the web stabilizer is provided. The rotating means includes a non-contact magnetic gear provided at at least one end of each guide bar, a motor that rotates in a magnetically meshed manner with the non-contact magnetic gear,
The web stabilizer according to any one of claims 1 to 4, wherein the web stabilizer is provided. Non-contact magnetic gears are provided at both ends of the four guide bars,
The non-contact magnetic gears at both ends of the two guide bars arranged above and below are in mesh with each other,
6. A web stabilizer according to claim 5, wherein: An adjustment means for adjusting the distance between the pair of left and right guide bars respectively disposed above and below the web;
The web stabilizer according to any one of claims 1 to 6, characterized in that:

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