JP2004307153A - Winding device and winding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent occurrence of winding wrinkles to perform consistent winding, and to prevent a magnetic tape 10 from being distorted in a winding device to wind the magnetic tape 10 around a winding roll while pressing the magnetic tape by touch rolls. <P>SOLUTION: A winding device comprises a winding roll 13 to wind the magnetic tape 10 carried via a predetermined treatment step, a plurality of touch rolls 15a and 15b which are rotated and brought into contact with an outermost circumferential surface of the magnetic tape 10 wound around the roll 13 at a predetermined pressure, and a controller C. The torque of the winding roll 13 is controlled based on the output (tension signal) of a dancer position detector 22 to detect the position of a dancer roll 12 to provide the tension to the magnetic tape 10, the rotational speed and/or the torque of the touch rolls 15a and 15b is controlled based on the preset tension, and the touch pressure of the touch rolls 15a and 15b is controlled based on the preset tension. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【００４１】
表１において▲１▼は従来行われている通常の巻き取り軸を駆動する方式、▲２▼は巻き取り軸とタッチロールを駆動する本発明を使用した方式である。巻き取り張力及びタッチロール圧力は巻き取り時の条件で、寸法変化量はその条件でのひずみの大きさを表す。絶対値が大きいほどひずみが大きい。
【００４２】
また、巻内／巻外寸法変化量差は、巻き取りロールの巻内と巻き外での寸法変化量を指し引いた絶対値である。数値が大きいほど、巻き取りロールの内側と外側のひずみ量に差があり、寸法精度などに影響を与える。
【００４３】
寸法変化量の測定は、８０℃／４５分間オーブンで処理し、処理前後の寸法変化量を測定した。▲１▼の通常の巻き取り方式では、ロール巻内では、０．２４０％程度のひずみであるが、巻外では、０．２９６％と巻き太っていくに従い、ひずみ量が大きくなってきているのに対し、▲２▼の本発明の巻き取り方式法では、巻内では、０．２４５％と▲１▼の通常巻きと同等であるが、巻外に行っても、０．２６２％と▲１▼の通常巻きと比較しても、巻内のひずみ量との差が小さく、巻き太っていくに従ってひずみを増やしていないことがわかる。
【００４４】
▲２▼の巻き方ではタッチ圧が２５０Ｎと若干高い圧力で接触しているが、これは、本方式がタッチロールを駆動する方式であるため、タッチロール以降のロール上の張力が弱くなってエアー切れの効率が悪くなることを防ぐための対策である。
【００４５】
従って、この結果より、本発明によれば、巻き取りロールの巻き取り始めのシワがなく、磁気テープにひずみを与えることなく、且つ、巻き取りロール内部のひずみ量を均一に巻き取ることができる巻き取り装置を提供することができる。
【００４６】
なお、本実施形態例では、上記巻き取り装置を磁気テープの巻き取り時に使用したが、この他に例えば磁性層の形成後の巻き取り時、巻き直し工程、所定幅に裁断した後の巻き取り時等、磁気テープの製造工程における様々な巻き取り作業時に転用することができるだけでなく、本発明は、印刷物、フィルム、製紙、織物、粘着テープ等、あらゆる被巻き取り物を対象とした巻き取り装置に適用することが可能である。その場合も前記と同様の作用、効果が得られる。
【００４７】
尚、本発明のタッチロールの個数は２個に限らず３個以上設けても良い。
【００４８】
【発明の効果】
以上のように本発明によれば、エアーの巻き込みを複数のタッチロール各々で抑制することができ、また複数のタッチロールを回転駆動しているため、被巻回体、例えば磁気テープに静止摩擦力が加わることがなく、タッチロールによる機械的損失も小さいので、巻き皺や歪みは発生せず、巻き取りロール内部の歪み量を均一にして巻き取ることができる。
【００４９】
これによって安定した被巻回体の巻き取りを実現することができる。従って、歪みによる品質の劣化（オフトラック、スキュー）が免れ、歩留りが著しく向上する。
【００５０】
また、巻き取りロール内部の歪み量を均一にして巻き取りを行うことができるため、巻き取りロールの長手方向の寸法精度および品質の信頼性が高く、検査数を大幅に削減することができる。
【図面の簡単な説明】
【図１】本発明の一実施形態例の全体構成図。
【図２】従来の巻き取り装置の一例を示す要部構成図。
【図３】従来の巻き取り装置の他の例を示す要部構成図。
【符号の説明】
Ａ…巻き取り装置、Ｃ…コントローラ、１０…磁気テープ、１１ａ〜１１ｆ…ガイドロール、１２…ダンサーロール、１３…巻き取りロール、１３ａ…巻き取り軸、１４…張力検出器、１５ａ，１５ｂ…タッチロール、１６ａ，１６ｂ，２０…電空変換器、１７ａ，１７ｂ，２１…シリンダ、１８ａ，１８ｂ，１９…モータ、２２…ダンサー位置検出器。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a winding device and a winding method for winding a wound body, for example, a magnetic tape onto a winding roll while pressing the magnetic tape with a touch roll.
[0002]
[Prior art]
The film strip is subjected to a surface treatment according to its use, for example, a magnetic paint coating solution or a photographic photosensitive coating solution, or a surface on which various coating solutions for surface protection, antistatic, and lubricity are applied. Finishing treatment, such as surface treatment of applying a magnetic or non-magnetic metal or its alloy to the surface, and, if necessary, calendering to enhance the surface properties of the applied film strip Is cut to a desired width and length. Typical products include magnetic recording media such as coating type or vapor deposition type magnetic tapes and magnetic disks, various photographic films, printing papers, and the like.
[0003]
Here, the film strip is generally a plastic film or paper such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), aramid, or the like having a thickness of 2 to 300 μm and a length of 1000 to 20000 m, or a resin. And a metal foil such as aluminum, copper, tin, etc., and also includes a band-shaped material having a base material on which a preliminary processed layer is formed.
[0004]
For example, the manufacture of magnetic tapes for video, audio, or data backup involves applying a magnetic paint in which magnetic particles are dispersed to the surface of a plastic base film and drying it, and improving the surface properties of the magnetic layer. And a variety of steps such as a cutting step of cutting a wide magnetic tape having been subjected to these processes into a predetermined width. In these various steps, it is usual that a tape wound in a roll is set in an unwinding section, and the above-described various steps are performed while the tape unwound from the tape is wound on a winding shaft.
[0005]
2. Description of the Related Art For winding a magnetic tape unwound from an unwinding unit and subjected to a predetermined process, a winding device as shown in FIG. 2, for example, has conventionally been used. A take-up roll 2 that takes up a wide and long magnetic tape 1 is configured to be driven to rotate at a predetermined speed and torque in a clockwise direction in FIG. A touch roll 4 is arranged above.
[0006]
One end of an arm 6 is attached to the touch roll 4 about a fulcrum 8, and a drive rod 7 of an air cylinder 5 is attached to the other end of the arm 6. As a result, the touch roll 4 is pressed with a predetermined touch pressure corresponding to the air pressure of the air cylinder 5 in a direction relatively perpendicular to the surface of the magnetic tape 1 wound on the take-up roll 2. And rotates counterclockwise in FIG.
[0007]
Similarly, as another conventional example, as shown in FIG. 3, the touch roll 4 is directly rotatably installed at the tip of the drive rod 7 of the air cylinder 5, and the touch roll 4 is linearly moved to take up. The magnetic tape 1 is pressed by a predetermined touch pressure corresponding to the air pressure of the air cylinder 5 in a direction perpendicular to the surface of the magnetic tape 1 wound on the roll 2, and receives a frictional force with the winding roll 2 in a counterclockwise direction in FIG. It may be configured to rotate to.
[0008]
The touch roll 4 is configured as described above, so that the magnetic tape 1 can be wound up in a state in which the magnetic tape 1 is always in close contact with the surface of the winding roll 2, and wrinkles due to uneven running speed of the magnetic tape 1, The winding is prevented from occurring due to the entrainment of air.
[0009]
Note that a winding device and an unwinding device using a touch roll are disclosed in, for example, Patent Documents 1 and 2 below.
[0010]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-307321
[Patent Document 2] JP-A-2002-226106.
[0012]
[Problems to be solved by the invention]
However, in the conventional winding device described with reference to FIGS. 2 and 3, since the touch roll 4 only rotates by friction with the winding roll 2, the touch roll 4 is in contact with the touch roll 4. In addition to the above-mentioned predetermined touch pressure, a static friction force acting between the surface of the tape 1 and the surface of the touch roll 4 is applied to the surface of the tape 1. Becomes larger.
[0013]
Therefore, the magnetic tape 1 sequentially fed between the take-up roll 2 and the touch roll 4 receives a large force at this portion, and compares the magnetic tape 1 with the running tension immediately before the take-up roll 2 so that the magnetic tape 1 applied to the take-up motor 3 The load is increased, and as a result, stress on the wound magnetic tape 1 after the touch roll 4 and especially on the tape on the inner side of the roll is increased, which results in tightening of the winding and poor shape due to transfer from the laminated tape. .
[0014]
In particular, in recent years, magnetic tapes have become thinner and the surface of the tape has been flattened, and the magnetic tape wound up in a roll form is laminated and wound up in multiple layers. When the magnetic tape is transferred onto the magnetic tape or wound into a roll, distortion occurs due to tight tightening of the inside of the roll, which causes a problem in that the shape of the magnetic tape is poor.
[0015]
In order to solve the above-mentioned problem, in Patent Literature 1, by providing a plurality of touch rolls, the mixing of air into the roll of the recording medium to be wound becomes uniform, and wrinkles and winding in winding are performed. A method of controlling so as to prevent occurrence of a shift has been proposed.
[0016]
However, since the touch roll is not driven to rotate, the mechanical loss of the touch roll increases due to the provision of a plurality of rolls. There is a problem that occurs.
[0017]
Also, in Patent Document 2, while rotating the touch roll contacting the outermost peripheral surface of the file-shaped strip at the running speed of the strip, the touch roll is wound when the film-shaped strip is wound on the winding roll. By changing the number of rotations according to the running speed of the film-shaped strip, the force applied in the opposite direction to the running direction due to the rotational friction of the touch roll is eliminated, thereby preventing the film-shaped strip from slipping and causing wrinkles. I try to suppress the occurrence.
[0018]
Fluctuations in the running speed of the film-like strip appear as fluctuations in the winding tension. In Patent Document 2, the rotation speed of the touch roll is controlled by detecting the fluctuation amount of the winding tension, and the rotation speed of the touch roll is controlled. And a method for achieving the same speed as that of a film-shaped strip.
[0019]
However, since the touch roll is used as the main shaft, it is necessary to keep the touch roll in contact from the beginning of winding, and the touch pressure comes in contact with a high pressure of 300 to 500 N and is controlled by one touch roll. Due to this, excessive force is applied at the contact portion with the magnetic tape, wrinkles are generated at the beginning of winding, and the wrinkles are transferred, and there are defects that several hundred meters in the winding become defective. .
[0020]
In addition, since this method is a method in which the take-up shaft is driven by a touch roll, if the contact pressure is not high, the rotational force cannot be transmitted to the take-up shaft. There has been a problem that slippage occurs between the take-up shafts and the take-up cannot be performed.
The present invention has been made in view of the above points, and an object of the present invention is to provide a winding device and a winding device that prevent the occurrence of wrinkles and allow stable winding, and do not give a distortion to a wound body. It is to provide a collecting method.
[0021]
[Means for Solving the Problems]
The present invention has solved the above-described problem by adopting a configuration in which a plurality of touch rolls for suppressing the entrainment of air generated at the time of winding are provided and driven in an apparatus for winding on a winding shaft. Thus, according to the present invention, it is possible to obtain a winding device that does not have wrinkles at the start of winding of the winding roll and can wind the magnetic tape without giving any distortion.
That is, the winding device of the present invention includes a winding roll that winds a continuously running wound body, a winding roll drive control unit that rotationally drives the winding roll and performs torque control, A plurality of touch rolls which contact the outermost peripheral surface of the wound body wound by the rolls with a predetermined pressure and rotate, and a touch roll drive control means for rotating the plurality of touch rolls and controlling a rotation speed; It is characterized by having.
[0022]
Further, the touch roll drive control means performs torque control.
[0023]
Further, the winding method of the present invention is characterized in that a winding roll for winding a continuously running wound object is driven to rotate by torque control, and the winding object wound on the winding roll is re-started. A plurality of touch rolls are brought into contact with the outer peripheral surface at a predetermined pressure, and drive control including rotation speed control is performed on the plurality of touch rolls.
[0024]
Further, the drive control for the plurality of touch rolls includes a torque control.
[0025]
Further, the wound body is a magnetic recording medium that is conveyed with a tension applied by a predetermined tension applying means during a magnetic recording medium manufacturing process.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to a winding device in a production line of a magnetic recording medium will be described with reference to the drawings. In FIG. 1, A indicates a winding device as a whole, and C indicates a controller that controls the winding device A.
[0027]
Reference numeral 10 denotes a magnetic tape (rolled body) which is unwound from an unillustrated unwinding unit and travels through predetermined processing steps. The magnetic tape 10 is wound on a cylindrical winding shaft 13a having a predetermined diameter of the winding roll 13 via the guide rolls 11a to 11c, the dancer roll 12 for imparting tension, and the guide rolls 11d to 11f sequentially. Can be
[0028]
Reference numeral 14 is a tension detector disposed between the guide rolls 11a and 11b. Reference numerals 15a and 15b denote two cylindrical touch rolls which are brought into contact with the outermost peripheral surface of the magnetic tape 10 wound around the cylindrical outer peripheral surface of the take-up shaft 13a and arranged to face each other.
[0029]
The touch rolls 15a and 15b are wound by cylinders 17a and 17b which receive pneumatic signals corresponding to set tension signals (electric signals) from the controller C from electropneumatic converters 16a and 16b for adjusting touch pressure. It is configured to be pressed against the take-up shaft 13a.
[0030]
Reference numerals 18a and 18b denote motors connected to the rotating shafts of the touch rolls 15a and 15b, which are driven and controlled at a speed and / or torque corresponding to the set tension signal from the controller C so as to be the same speed as the traveling magnetic tape 10. Is done.
[0031]
Reference numeral 19 denotes a motor connected to the rotation shaft of the take-up shaft 13a, and torque control is performed by a control signal from the controller C to be described later.
[0032]
The take-up shaft 13a is driven to rotate in the running direction of the magnetic tape 10 by the motor 19, and the touch rolls 15a, 15b are driven to rotate in the running direction of the magnetic tape 10 by the motors 18a, 18b. The long magnetic tape 10 fed at a predetermined speed is sequentially wound around a winding roll 13.
[0033]
A load is applied to the dancer roll 12 in the downward direction in the figure by a cylinder 21 driven by receiving an air pressure signal from the electropneumatic converter 20 between the guide rolls 11c and 11d. Thus, a predetermined tension is applied to the magnetic tape 10 when a load is applied to the dancer roll 12 in the downward direction in the figure.
[0034]
The electropneumatic converter 20 receives an output signal (an electric signal corresponding to a tension deviation) obtained by comparing and calculating by the controller C the tension detected by the tension detector 14 and the set traveling tension.
[0035]
A dancer position detector 22 detects the position of the dancer roll 12.
[0036]
In the device configured as described above, the tension of the running magnetic tape 10 is determined by inputting a signal corresponding to the tension deviation from the controller C to the electropneumatic converter 20 and driving the cylinder 21 to cause the dancer roll 12 to move. Is determined by moving up and down.
[0037]
The controller C introduces the detection signal (tension signal) of the dancer position detector 22 and applies the torque of the winding shaft 13a via the motor 19 so that the running tension of the magnetic tape 10 before the touch roll 15b is constant. Control. Thereby, the take-up roll 13 can be rotated at the same speed as the magnetic tape 10.
The controller C controls the rotation speed and / or torque of the touch rolls 15a and 15b via the motors 18a and 18b based on the set tension. Thus, the touch rolls 15a and 15b can be rotated at the same speed as the magnetic tape 10 and an arbitrary torque can be applied.
[0038]
As described above, a plurality of touch rolls (15a, 15b) for suppressing entrainment (mixing) of air generated at the time of winding of the winding roll 13 are provided, and can be driven to rotate by the motors 18a, 18b. With this configuration, the magnetic tape 10 can be wound without wrinkles from the start of winding of the winding roll 13 and without giving any distortion to the magnetic tape 10.
[0039]
Next, the results of the winding test of the present invention will be described. Table 1 below shows the results obtained by winding up using the method of the present invention and measuring the amount of strain. The magnetic tape used was a magnetic material of a magnetic recording medium having a width of 24 inches.
[0040]
[Table 1]

[0041]
In Table 1, (1) is a conventional system for driving a usual winding shaft, and (2) is a system using the present invention for driving a winding shaft and a touch roll. The winding tension and the touch roll pressure are conditions at the time of winding, and the dimensional change represents the magnitude of the strain under the conditions. The greater the absolute value, the greater the strain.
[0042]
Further, the difference between the inside and outside dimensional changes is an absolute value obtained by subtracting the dimensional change between the inside and outside of the winding roll. The larger the numerical value is, the more the amount of distortion is inside and outside the take-up roll, which affects dimensional accuracy and the like.
[0043]
The dimensional change was measured at 80 ° C. for 45 minutes in an oven, and the dimensional change before and after the treatment was measured. In the ordinary winding method of (1), the strain is about 0.240% inside the roll, but outside the roll, the strain increases to 0.296% as the winding becomes thicker. On the other hand, in the winding method of the present invention in (2), the inside of the winding is 0.245%, which is equivalent to the normal winding in (1). Compared with the normal winding of (1), the difference from the amount of strain in the winding is small, and it can be seen that the distortion does not increase as the winding becomes thicker.
[0044]
In the winding method of (2), the touch pressure is 250N and the contact is made with a slightly higher pressure. However, since this method is a method of driving the touch roll, the tension on the roll after the touch roll becomes weak. This is a measure to prevent the efficiency of running out of air from becoming worse.
[0045]
Therefore, from this result, according to the present invention, there is no wrinkle at the start of winding of the winding roll, no distortion is given to the magnetic tape, and the amount of distortion inside the winding roll can be uniformly wound. A winding device can be provided.
[0046]
In the present embodiment, the above-described winding device is used for winding a magnetic tape. In addition, for example, when winding after forming a magnetic layer, a rewinding process, and winding after cutting to a predetermined width. The present invention can be applied not only to various winding operations in a manufacturing process of a magnetic tape, such as a time, but also to winding of any material to be wound, such as printed matter, film, papermaking, woven fabric, and adhesive tape. It is possible to apply to the device. In this case, the same operation and effect as described above can be obtained.
[0047]
The number of touch rolls according to the present invention is not limited to two, but may be three or more.
[0048]
【The invention's effect】
As described above, according to the present invention, the entrainment of air can be suppressed by each of the plurality of touch rolls, and since the plurality of touch rolls are driven to rotate, static friction can be applied to a wound body, for example, a magnetic tape. Since no force is applied and the mechanical loss due to the touch roll is small, winding wrinkles and distortion do not occur, so that the amount of distortion inside the winding roll can be made uniform and winding can be performed.
[0049]
Thus, stable winding of the wound body can be realized. Therefore, quality deterioration (off-track, skew) due to distortion is avoided, and the yield is significantly improved.
[0050]
In addition, since winding can be performed with the amount of distortion inside the winding roll being uniform, the dimensional accuracy and quality in the longitudinal direction of the winding roll are high, and the number of inspections can be significantly reduced.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of an embodiment of the present invention.
FIG. 2 is a main part configuration diagram showing an example of a conventional winding device.
FIG. 3 is a main part configuration diagram showing another example of a conventional winding device.
[Explanation of symbols]
A: winding device, C: controller, 10: magnetic tape, 11a to 11f: guide roll, 12: dancer roll, 13: winding roll, 13a: winding shaft, 14: tension detector, 15a, 15b: touch Rolls, 16a, 16b, 20: electropneumatic converter, 17a, 17b, 21: cylinder, 18a, 18b, 19: motor, 22: dancer position detector.

Claims (6)

A winding roll that winds a continuously wound body to be wound;
Take-up roll drive control means for rotating and driving the take-up roll and performing torque control,
A plurality of touch rolls that rotate at a predetermined pressure on the outermost peripheral surface of the wound body wound on the winding roll,
A winding device comprising: a touch roll drive control unit that drives the plurality of touch rolls to rotate and controls a rotation speed. The winding device according to claim 1, wherein the touch roll drive control unit performs torque control. The winding device according to claim 1, wherein the wound body is a magnetic recording medium that is transported with a tension applied by a predetermined tension applying unit during a magnetic recording medium manufacturing process. A take-up roll for winding a continuously wound object to be wound is rotationally driven by torque control,
A plurality of touch rolls are brought into contact with a predetermined pressure on the outermost peripheral surface of the wound body wound on the winding roll,
A winding method, wherein drive control including rotation speed control is performed on the plurality of touch rolls. The winding method according to claim 4, wherein the drive control for the plurality of touch rolls includes torque control. The winding method according to claim 4, wherein the wound body is a magnetic recording medium that is transported with a tension applied by a predetermined tension applying unit during a magnetic recording medium manufacturing process.

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