JPWO2010137060A1 - Unwinder device or winder device - Google Patents

Abstract

Provided is an unwinder device or a winder device provided with a cutting knife mechanism that can cut a web well even when the web is being fed at a high speed. In an unwinder apparatus provided with a cut knife 34 that feeds a web 51 wound in a roll shape onto a paper making line and cuts the fed web 51 at a predetermined position, the feeding speed of the web 51 fed out is not reduced or stopped. A cut knife mechanism 32 that cuts the web 51 by moving the cut knife 34 perpendicular to the web 51 is provided.

Description

  The present invention relates to a winder device having a function of winding a web wound in a roll shape on a papermaking line, or a winder device having a function of winding (rewinding) a web running on the papermaking line in a roll shape.

  When coating a roll-wrapped web (including paper, coated paper, thermal paper, etc.) with a coater, etc., after unwinding the web from the roll on which the web is wound and coating the web Then, an operation of rewinding the coated web into a roll again is performed. In the unwinder device used for unwinding the web, when the web of the currently unrolled roll (hereinafter referred to as the old roll) is reduced, a new roll (hereinafter referred to as the new roll) is supplied. The frame is changed.

  Conventionally, at the time of this frame change, the paper feed of the unwinder device is decelerated or stopped, and the end of the paper roll unwound from the old roll is cut to join the front end of the new roll. (For example, refer to Patent Document 1).

  FIG. 4 is a schematic view of a conventional cut knife mechanism 50 for cutting a web.

  The cutting knife mechanism 50 for cutting the web 51 of the old roll is arrange | positioned between the two conveyance rollers 52a and 52b (pressure roll), as shown in FIG. The knife mechanism 50 includes a cut knife 54, an arm portion 56 to which the cut knife 54 is attached, a rotation shaft 58 that rotatably supports an end portion of the arm portion 56, and the rotation shaft 58. And a hydraulic device 60 for rotating the arm portion 56 in the R direction. The hydraulic device 60 is fixed to the main body portion 64 of the unwinder device 62 with a fastening member such as a bolt 66.

  When the web 51 fed in the T direction with a predetermined tension is moved between the two conveying rollers 52a and 52b in a manner in which the cut knife 54 is rotated upward in the R direction, the cutting edge 54a of the cut knife 54 is moved. Is pressed against the web 51, and the web 51 is cut.

JP 2002-284407 A

  In recent years, speeding up of the papermaking line has been remarkable in order to improve the productivity of the web, and the web is sent at a high speed of 2000 m / min at the maximum. In recent years, the above-described web cutting is performed at a high speed without reducing or stopping the web feed speed. Therefore, when a web that is fed at a high speed is cut using a conventional cut knife mechanism, the sharpness at high speed is poor, the length of the web required for cutting becomes longer, the amount of web scattering increases, and winding (winding) ). In addition, there is a risk of coating defects and running out of paper.

  The present invention has been made in view of the above-described circumstances. An unwinder device or a winder device including a cut knife mechanism that can cut a web satisfactorily even when the web is being fed at high speed. It is for providing.

  In order to solve the above-described problems, the present invention is directed to an unwinder apparatus including a cut knife that feeds a web wound in a roll shape onto a papermaking line and cuts the fed web at a predetermined position. A cut knife mechanism is provided that cuts the web by moving the cut knife perpendicular to the web without decelerating or stopping the feed rate.

  The present invention also provides a feed speed of the web that is fed out in a winder device that includes a cut knife that cuts the web that has been fed out at a predetermined position in order to wind the web that has been fed out on a papermaking line in a roll shape. A cut knife mechanism is provided that cuts the web by moving the cut knife perpendicular to the web without decelerating or stopping the web.

  Further, in the unwinder device or the winder device described above, the cut knife mechanism may include an air cylinder that linearly moves the cut knife.

  Furthermore, in the unwinder device or the winder device described above, the cut knife is formed by cutting the end of a flat plate obliquely to form a cutting edge, and the cut knife is disposed so as to be inclined with respect to the plane of the web. Also good.

  Furthermore, in the unwinder device or the winder device described above, the angle α of the cut knife with respect to the plane of the web is in the range of 20 degrees to 65 degrees, and the blade edge angle of the cut knife is in the range of 10 degrees to 45 degrees. The angle obtained by subtracting the angle β from the angle α may be in the range of 10 degrees to 20 degrees.

  In the unwinder device or the winder device described above, the angle α may be approximately 44 degrees, and the blade edge angle β may be approximately 30 degrees.

  Since the unwinder device according to the present invention includes a cut knife mechanism that cuts the web by moving the cut knife vertically with respect to the web without reducing or stopping the feed speed of the web that is fed out. Compared with the conventional rotating type, the angle of the blade edge pressed against the web is constant. Therefore, the variation in cutting due to the change in the contact angle between the blade edge and the web due to the movement of the cutting knife is reduced, and the sharpness is improved. As a result, the web length required for cutting does not become unnecessarily long even when the web is fed at a high speed without decelerating or stopping the web feed speed. Less scattering. In addition, since the cut surface is in a good state, when the web is rewound again, winding is not hindered, and there is no adverse effect on equipment such as a coater in the next process.

  On the other hand, in the winder device according to the present invention, similarly to the unwinder device, the web is cut by moving the cutting knife perpendicularly to the web without decelerating or stopping the web feed speed. Since the cut knife mechanism is provided, the angle of the blade edge pressed against the web is constant as compared with the conventional rotary type. Therefore, the variation in cutting due to the change in the contact angle between the blade edge and the web due to the movement of the cutting knife is reduced, and the sharpness is improved. As a result, the web length required for cutting does not become unnecessarily long even when the web is fed at a high speed without decelerating or stopping the web feed speed. Less scattering.

It is a schematic diagram of an unwinder device provided with a cut knife mechanism concerning the present invention. It is a schematic diagram which expands and shows a cut knife mechanism. It is a schematic diagram which shows the state of the cut knife with respect to a web. It is a schematic diagram which shows the conventional cut knife mechanism.

  Hereinafter, an unwinder device according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, the same thing as a conventional structure attaches | subjects and demonstrates the same code | symbol.

  FIG. 1 is a schematic diagram of the unwinder device 1.

  As shown in FIG. 1, the unwinder device 1 includes a new roll installation unit 10 located on the left side of the drawing, an old roll installation unit 20 located on the right side of the new roll installation unit 10, and the new roll installation unit 10 and It is comprised with the splice part 30 arrange | positioned between the old roll installation parts 20. FIG. As shown in FIG. 1, the web 51 unwound from the roll installed in the new roll installation unit 10 and / or the old roll installation unit 20 passes through the upper side of the splice unit 30 to the lower side of the drawing in FIG. 1. Is sent out. The post-process for feeding out the web 51 is, for example, a coating process for a coater (not shown).

  In this embodiment, the web 51 is fed out at a speed of 1800 m / min, and this feeding speed is reduced or stopped even when the frame is changed between the new roll 11 and the old roll 21 (details will be described later). Without feeding the web 51 at the same speed.

  Note that the web in the present embodiment refers to a material mainly made of paper (coating paper, thermal paper, pressure sensitive paper, etc.), and does not include a protective film made of plastic. That is, it refers to a product made of a material that can be cut with a cut knife described later.

  The new roll installation unit 10 includes a gantry 12 on which the new roll 11 is placed, and a moving rail 13 for moving the new roll 11. The core material 11a of the new roll 11 protrudes from both ends of the new roll 11 respectively. And the new roll 11 is mounted in the left side part 13a of the core material 11a of this both ends by two moving rails 13 (it arrange | positions two in the near side and back side in FIG. 1). The moving rail 11 extends substantially horizontally from the left side portion 13a toward the old roll installation portion 20, and the new roll 11 placed on the moving rail 11 extends substantially horizontally along the moving rail 13 to the right side portion 13b. Moving. For example, as shown in FIG. 1, the movement of the rotation arm 15 is such that one end portion 15 a is fixed to the rotation shaft 14 and the other end portion 15 b is in contact with the core material 11 a and presses the core material 11 a. Done by exercise. The rotating arm 15 is driven to rotate by a driving device (not shown).

  From the new roll 11 moved to the right side portion 13b, the web 51 wound in a roll shape is unwound. The new roll 11 is disposed on the right side portion 13b until the web 51 is unwound and becomes smaller than a predetermined roll diameter.

  The old roll installation unit 20 includes a gantry 22 on which the old roll 21 is placed.

  The old roll 21 refers to a roll in which the new roll 11 has become smaller than a predetermined roll diameter, and refers to a roll in which a new roll needs to be installed next.

  When the new roll 11 being unwound becomes smaller than a predetermined roll diameter, the new roll 11 is moved from the right side portion 13b of the moving rail 13 to the upper side of the gantry 22 of the old roll installation section 20. This movement is performed by turning a turning arm (not shown) around the turning shaft 40. At this time, while the web 51 is being unwound, the old roll 21 being unwound is transferred from the new roll installation unit 10 to the old roll installation unit 20 while taking an arc-shaped locus.

  Moreover, after the old roll 21 which became below a predetermined roll diameter moved to the old roll installation part 20 in the new roll installation part 10, the new new roll 11 is mounted in the left side part 13a, as mentioned above. It is moved to the right part 13b. A double-sided tape (not shown) for bonding to the old roll 21 is attached to the leading end of the web 51 of the new roll 11. The new roll 11 is rotated alone when changing the frame with the old roll 21, and is accelerated until the speed of the outer peripheral surface becomes 1800 m / min which is the same as the feed speed of the web 51.

  On the other hand, the splice unit 30 is positioned between two pressure rolls 31a and 31b (in FIG. 1, the left side of the paper is 31a and the right side is 31b) and the pressure rolls 31a and 31b, and is fed from the old roll 21. A cut knife mechanism 32 that cuts the web 51, and a push-up mechanism 33 that pushes the pressure rolls 31a and 31b and the cut knife mechanism 32 upward substantially are provided.

  The pressure rolls 31a and 31b receive and feed out the web 51 on these outer peripheral surfaces. At this time, the web 51 is sent out in a state of receiving a predetermined tension on the upper side of the pressure rolls 31a and 31b.

  The push-up mechanism 33 is configured such that the right side portion of FIG. 1 rotates up and down around a rotation shaft 39 provided on the gantry 12 of the new roll installation unit 10. For example, this rotating operation may use compressed air, or may be operated by a hydraulic mechanism, as in an air cylinder 36 described later. By this rotation operation, the pressure rolls 31a and 31b located on the left side of the paper are movable up and down. In particular, the pressure roll 31a moves toward the outer peripheral surface of the new roll 11 and presses against the outer peripheral surface. Will come to be. At this time, since the web 51 unwound from the old roll 21 is fed out between the new roll 11 and the pressure roll 31 a, the web 51 is pressed against the outer peripheral surface of the new roll 11. Since the peripheral speed of the outer peripheral surface of the new roll 11 is accelerated to the same speed as the feed speed of the web 51, the web 51 of the old roll 21 being fed is pressed against the double-sided tape of the new roll 11. The web 51 of the old roll 21 and the web 51 of the new roll 11 are joined together.

  FIG. 2 is a schematic diagram showing the cut knife mechanism 32 in an enlarged manner. FIG. 3 is a schematic diagram showing the state of the cutting knife 34 relative to the web 51.

  The cut knife mechanism 32 is pushed up by the push-up mechanism 33 together with the pressure rolls 31a and 31b. As shown in FIG. 2, the cut knife mechanism 32 includes a cut knife 34, a support part 35 to which the cut knife 34 is attached, and an air cylinder 36 that moves the support part 35 up and down.

  The air cylinder 36 operates independently of the push-up operation of the push-up mechanism 33, and moves the support portion 35 and the cut knife 34 linearly up and down using compressed air. The air cylinder 36 is supplied with air from an air supply port (not shown) and discharges compressed air from an air discharge port (not shown). The air cylinder 36 is connected to a control device (not shown) by wires 37a and 37b. The air cylinder 36 compresses / discharges air taken in based on a signal from the control device, and moves the support portion 35 and the cut knife 34 up and down. Move to.

  As shown in FIG. 3, the cutting knife 34 is attached so as to protrude upward from the opening 38 a of the stabilizer 38 that guides the web 51 in the feeding direction. As shown in FIG. 3, the cutting knife 34 has a flat plate with a tip portion cut obliquely, and the cut portion is formed as a cutting edge 34 a for cutting the web 51.

  As shown in FIG. 3, the angle of the cutting edge 34 a of the cut knife 34 is formed so as to be at an angle β with a flat plate-like plane. This cutting edge angle β is formed at approximately 30 degrees.

  Further, as shown in FIG. 3, the cut knife 34 is arranged such that the angle between the flat plate-like plane and the surface of the web 51 is α. This angle α is set to be approximately 44 degrees.

  In particular, regarding the relationship between the angles α and β described above, an angle obtained by subtracting the angle β from the angle α is in the range of 10 degrees to 20 degrees, which is an important angle for making the cut surface generally good. . That is, the angle α described above is in the range of 20 degrees to 65 degrees, the cutting edge angle β is in the range of 10 degrees to 45 degrees, and the angle obtained by subtracting the angle β from the angle α is 10 degrees to 20 degrees. Within the range, even if the web 51 is kept running at a high speed, a good cut surface can be obtained using the cut knife mechanism 32.

  In this case, when the angle of (α−β) is set to 14 degrees, it has been obtained as experimental data that the sharpness is best and a good cut surface can be obtained.

  Further, the protruding direction F of the cut knife 34 (drive direction of the air cylinder 36) is substantially perpendicular to the feed direction T of the web 51. That is, the web 51 is cut by moving the cutting knife 34 perpendicularly to the web 51.

  The cut knife 34 installed in such an arrangement is connected to the web 51 of the old roll 21 and the web 51 of the new roll 11, and then the cut knife 34 is moved to the web of the old roll 21 by the operation of the air cylinder 36. 51, the web 51 of the old roll 21 is cut.

  The old roll 21 after being cut is moved to the right side of the gantry 22 and discharged from the unwinder device 1 as shown by a two-dot chain line in FIG. By sequentially repeating these operations, the web 51 to be supplied to the unwinder device 1 is connected, and the frame change between the old roll 21 and the new roll 11 is performed without decelerating or stopping.

In addition, as a result of operating the cutting knife mechanism 32 on the following conditions using the above-mentioned unwinder apparatus 1, the favorable web cut surface was able to be obtained.
Web Base paper basis weight 114g / m ²
Feeding speed 1800m / min
Angle between cut knife and web α 44 degrees Blade angle β 30 degrees

  According to the unwinder device according to the embodiment of the present invention, the cut knife mechanism that cuts the web 51 by moving the cut knife 34 perpendicularly to the web 51 without decelerating or stopping the feed speed of the web 51 that is fed out. 32, the angle of the blade edge 34a pressed against the web 51 is constant as compared with the conventional rotary type. Therefore, the variation in cutting due to the change in the contact angle between the blade edge 34a and the web 51 due to the movement of the cutting knife 34 is reduced, and the sharpness is improved. As a result, the length of the web 51 required for cutting does not become unnecessarily long even if the web 51 is fed at a high speed without reducing or stopping the feeding speed of the web 51 being fed. Less scattering of paper pieces. In addition, since the cut surface is in a good state, when the web 51 is rewound again, it does not hinder the winding, and does not adversely affect equipment such as a coater in the next process.

  Further, since the cut knife mechanism 32 includes the air cylinder 36 that linearly moves the cut knife 34, the cut knife mechanism 32 does not deteriorate the response to the signal as compared with the case where the cut knife mechanism 32 is moved by a hydraulic mechanism. The structure of 32 can be simplified. Further, the cost can be reduced as compared with the hydraulic mechanism.

  Further, the cutting knife 34 is formed by cutting the tip of a flat plate obliquely to form a cutting edge 34a, and the flat plane of the cutting knife 34 is arranged at an angle α with respect to the plane of the web 51. Therefore, when the cutting knife 34 is moved with respect to the web 51, the cutting edge 34 a can be arranged so as to easily cut the web 51.

Furthermore, the angle α of the cutting knife 34 with respect to the flat surface of the web 51 is arranged at approximately 44 degrees, and the angle β of the cutting edge 34 a of the cutting knife 34 is approximately 30 degrees with the flat surface of the cutting knife 34. Therefore, when the cutting knife 34 is pressed perpendicularly to the web 51, the cutting knife 34 can cut the web 51 so that the most suitable arrangement with good sharpness can be achieved. Although the unwinder device according to the embodiment has been described, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention.

  For example, although the unwinder device has been described in the present embodiment, the present invention can be similarly applied to a winder device that winds (rewinds) a web fed onto a papermaking line in a roll shape. That is, it can be used to cut the web so as to have a predetermined roll diameter when the web after coating is rolled again. Even in this case, the same cutting knife mechanism 32 described in the embodiment is used, and the cutting knife 34 is moved vertically with respect to the web 51, thereby cutting without slowing or stopping the web feed speed. Even if it does, a cut surface will be in a favorable state.

  Moreover, in this Embodiment, if the cut knife 34 can be linearly moved up and down, it will not be limited to the structure using an air cylinder. For example, a structure in which the cutting knife 34 is moved via a stepping motor or a link mechanism may be used. However, a structure using an air cylinder is most suitable as a mechanism for linear movement in the current technology.

DESCRIPTION OF SYMBOLS 1 Unwinder apparatus 10 New roll installation part 11 New roll 11a Core material 12 Mounting base 13 Moving rail 13a Left side part 13b Right side part 14 Rotating shaft 15 Rotating arm 15a One end part 15b Other end part 20 Old roll installation part 21 Old roll 22 Mounting base 30 Splice parts 31a, 31b Pressure roll 32 Cut knife mechanism 33 Push-up mechanism 34 Cut knife 34a Cutting edge 35 Bearing part 36 Air cylinder 37a, 37b Wiring 38 Stabilizer 38a Opening part 39 Rotating shaft 40 Rotating shaft 50 Cut knife mechanism 51 Web 52a , 52b Conveying roller 54 Cut knife 54a Cutting knife edge 56 Arm portion 58 Rotating shaft 60 Hydraulic device 62 Unwinder device 64 Unwinder device main body 66 Bolt F Projecting direction R Rotating direction T Sending out Installation angle β edge angle direction α cutting knife

Claims (10)

In an unwinder device provided with a cutting knife that feeds a web wound in a roll shape onto a papermaking line and cuts the web that has been sent out at a predetermined position,
An unwinder device comprising: a cut knife mechanism that cuts the web by moving the cut knife perpendicular to the web without decelerating or stopping the feeding speed of the web that is fed out.   The unwinder device according to claim 1, wherein the cut knife mechanism includes an air cylinder that linearly moves the cut knife.   The cutting knife is formed by cutting the front end of a flat plate obliquely to form a cutting edge, and the cutting knife is disposed so as to be inclined with respect to the plane of the web. The unwinder device according to 2.   The angle α of the cut knife with respect to the plane of the web is in the range of 20 degrees to 65 degrees, the cutting edge angle of the cut knife is in the range of 10 degrees to 45 degrees, and the angle β is subtracted from the angle α. The unwinder according to claim 3, wherein the angle is in the range of 10 degrees to 20 degrees.   The unwinder according to claim 4, wherein the angle α is approximately 44 degrees and the cutting edge angle β is approximately 30 degrees. In a winder device provided with a cutting knife for cutting the fed web at a predetermined position in order to wind the web fed on the papermaking line in a roll shape,
A winder device comprising: a cut knife mechanism that cuts the web by moving the cut knife perpendicularly to the web without reducing or stopping the feed speed of the web that is fed out.   The winder device according to claim 6, wherein the cut knife mechanism includes an air cylinder that linearly moves the cut knife.   The said cutting knife cuts the front-end | tip of a flat plate diagonally, and formed the blade edge | tip, The said cutting knife is inclined and arrange | positioned with respect to the plane of the said web, The Claim 6 or Claim characterized by the above-mentioned. The winder device according to 7.   The angle α of the cut knife with respect to the plane of the web is in the range of 20 degrees to 65 degrees, the cutting edge angle of the cut knife is in the range of 10 degrees to 45 degrees, and the angle β is subtracted from the angle α. The winder device according to claim 8, wherein the angle is within a range of 10 degrees to 20 degrees.   The winder device according to claim 9, wherein an angle α of the cut knife with respect to a plane of the web is approximately 44 degrees, and a blade edge angle β of the cut knife is approximately 30 degrees.

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