JP2000177891A - Winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a winder and a roll sheet body improving the efficiency of the change work of rolls in changing the width of a sheet and reducing the manufacturing cost of the roll sheet body and provide the winder reducing the bending of a contact press roll, uniformalizing the pressing force, and winding the sheet at a high speed. SOLUTION: A winder is provided with a plurality of winding means, a contact press roll 1 corresponding to each winding means, and a common backup roll 8 for the contact press roll 1. An angle θformed by lines connecting the contact press roll 1 and the backup roll 3 to respective rotation centers is set within the range of -15 deg. <=θ<=25 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device and a method for manufacturing a sheet roll body which can be suitably used for winding a sheet such as a plastic film, paper, metal fabric, cloth, non-woven fabric and the like.

[0002]

2. Description of the Related Art A continuous sheet has no wrinkles or misalignments.
In addition, in order to take up a roll with an appropriate hardness, a contact pressure roll is conventionally used. This is intended to improve the winding shape and the like by appropriately controlling the entrainment of the accompanying air generated during the winding of the sheet into the sheet roll body. In general, when the entrained air entrainment amount increases, wrinkles and deviations are likely to occur, so that the entrained air amount is reduced. For this purpose, it is effective to reduce the diameter of the pressure roller, but this results in insufficient rigidity of the pressure roller.
Usually, since the contact pressure roll is urged to the sheet roll body by supporting both ends of the contact pressure roll, if the rigidity is insufficient, the contact pressure roll bends, and the nip force at the central portion of the sheet roll body decreases, There has been a problem of winding defects such as wrinkles.

[0003] For example, Japanese Patent Application Laid-Open No. Hei 8-26535 has a rubber coating 15 having a concentric shaft 13 that contacts only near the center of the inner surface of a roll shell 12 as shown in FIGS. A contact pressure roll 11 is disclosed. This is to obtain a more uniform nip force by applying a force to both ends of the shaft 13 and pressing it against the sheet roll body 4. However, the bending moment which becomes maximum near the center of the shaft 13 is reduced. There is a limit in reducing the shaft diameter in order to obtain a strength that can be endured. Therefore, there is a problem that the diameter of the contact pressure roll cannot be sufficiently reduced.

In Japanese Patent Laid-Open Publication No. 5-97296,
As shown in FIGS. 3 and 4, a divided backup roll 17 is disposed near the center of the contact pressure roll 16, and
However, when the divided backup roll 17 is partially pressed to the vicinity of the center of the contact pressure roll 16, the contact portion is liable to be worn or damaged, and the nip force is reduced. There is a problem that uniformity occurs. In addition, the frequency of replacing the damaged pressure roller 16 has increased, and problems such as deterioration of workability have occurred.

Further, the publication discloses an example in which another backup roll 21 is disposed between the contact pressure roll 16 and the divided backup roll 17 as shown in FIGS. Since the backup rolls 21 are arranged over the entire width of the contact pressure rolls 16, the above-described problem is reduced, but the contact area between the rolls is increased, the rotation resistance is increased, and a very thin sheet is wound. In such cases, there is a high possibility that excessive tension will be applied to the sheet,
There is also a problem that wrinkles and the like easily occur. In addition, since the rotational inertia also increases, there is a problem that it is disadvantageous to increase the winding speed for improving productivity. Further, when the number of rolls increases as described above, there is a disadvantage that the replacement operation becomes complicated.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the conventional winding device, to make the work of changing rolls more efficient at the time of changing the width of a sheet, etc. It is an object of the present invention to provide a winding device and a method for manufacturing a roll sheet body, which can reduce the number of sheets. Furthermore, even if the diameter of the contact pressure roll is small, its deflection can be reduced,
It is an object of the present invention to provide a winding device and a method of manufacturing a roll sheet body that can uniformly press the pressure and wind a sheet at a high speed.

[0007]

In order to achieve the above object, the present invention provides a plurality of winding means, a contact pressure roll provided for each winding means, and a common pressure roll for each contact pressure roll. It is characterized by a winding device provided with a provided backup roll.

Here, it is preferable that the driving means is connected to the backup roll, and it is preferable that the winding means has means for urging the winding means toward the contact pressure roll.

It is also preferable that the winding means and the contact pressure roll are arranged in a staggered manner with respect to the backup roll.

Further, the angle θ between the line connecting the winding means and the rotation center of each of the contact pressure rolls and the line connecting the rotation center of each of the contact pressure roll and the backup roll is −
It is also preferable that the angle is in the range of 15 ° ≦ θ ≦ 25 °.

When the outer diameter D (mm) and the surface length L (mm) of the contact pressure roll are L> 1,000, D / L ≦ 0.0
It is also preferable that the value of D satisfies the condition of 48 and that the value of D ≤ 48 when L ≤ 1,000.

Further, the Young's modulus E (Pa) of the contact pressure roll
, The second moment of area I (mm ⁴ ), and the surface length L (m
m) also preferably satisfies the formula E × (I / L ⁴ ) ≧ 1.0 × 10 ³ .

Further, a method of manufacturing a sheet roll body for winding a sheet by using the above winding device is also preferable.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 7, a winding device according to an embodiment of the present invention comprises a plurality of (four) winding means 3.
0, a pressure roll 1 corresponding to each winding means, and a backup roll 3 common to each pressure roll 1.
The winding unit 30 drives a chuck device (fixing unit) 7 for fixing the core 50, an air cylinder (biasing unit) 8 for urging the winding unit toward the contact pressure roll, and a winding device. The backup roll 3 is provided in a staggered manner with respect to the backup roll 3. Backup roll 3
Is connected to a driving means 40 and is rotatably supported via a bearing such as a bearing.

As shown in FIG. 8, each contact pressure roll 1 is a free roll rotatably held by a contact pressure roll holding arm (holding means) 6 so as to maintain a predetermined angle θ, and a roll sheet body. 4 and the backup roll 3.

Further, as shown in FIG. 9, a winding device according to another embodiment of the present invention comprises a plurality of (four) winding means 3.
0, a contact pressure roll 1 corresponding to each winding means, a backup roll 3 common to each contact pressure roll on one side, and a backup roll 5 common to each contact pressure roll on the other side. .

The sheet 2 such as a film travels in the direction of arrow A as shown in FIGS.
Wound up. The winding means 30 moves linearly in the direction of arrow B as the sheet roll body 4 becomes thicker.

In the present invention, contact pressure rolls are provided corresponding to the plurality of winding means, and a backup roll common to the contact pressure rolls is provided. Since the backup roll is common, even when the sheet winding width is changed, it is only necessary to replace the contact pressure roll and the winding means, and the roll sheet body can be manufactured efficiently.

It is preferable that a drive means is connected to the backup roll, for example, at the shaft end, because an increase in the tension applied to the sheet due to the rotational resistance of the backup roll can be suppressed. Further, when the driving means is connected to the winding means, the driving force of the winding means and the driving force of the backup roll can apply a winding tension to the sheet. In this case, even if the winding length is long and the diameter of the roll sheet body is large, the driving force required to generate a predetermined winding tension can be shared by both, and the winding means such as a motor can be used. The capacity can be reduced.

As a material of the backup roll, a metal such as steel or aluminum can be used, and if carbon fiber reinforced resin is used, the weight can be reduced, so that the rotational inertia is reduced, which is advantageous for high-speed rotation. This is preferable because the load on the driving means during acceleration / deceleration can be reduced. The surface of the backup roll is preferably coated with metal, rubber, ceramic, or the like. In particular, when a high-hardness material is used, the rotation resistance associated with the contact rotation with the contact pressure roll is preferably reduced.

The structure, material, and shape of the backup roll are appropriately determined so that the deflection against the surface pressure received from the contact roll is sufficiently reduced.

Preferably, the winding means has means for urging the winding means toward the contact pressure roll. Thereby, an appropriate surface pressure can be applied to the roll sheet body, and a roll sheet body with few winding defects such as wrinkles can be manufactured. The above-mentioned bias is, for example, shown in FIG.
As shown in FIG. 9, there can be mentioned a method of using a pressurizing device (biasing means) 8 such as an air cylinder connected to the fixing means 7.

Further, if the winding means is provided with a means for retreating backward as the sheet roll body becomes thicker, it becomes possible to appropriately press the sheet roll body. The retracting means may be a mechanism that rotates around a certain fulcrum axis.However, by using a mechanism that can move linearly, control of the urging means is facilitated, and a change in the angle θ described later is reduced. It is smaller and preferable.

Preferably, the winding means and the contact pressure roll are arranged in a staggered manner with respect to the backup roll. Here, the staggered state refers to a state in which the rotation centers of the adjacent winding units are not on the same line. By arranging in a staggered manner,
The fixing means and the driving means can be efficiently arranged at the ends of the winding means and the contact pressure roll, and the winding apparatus can be made more compact.

The angle θ between the line connecting the winding means and the rotation center of the pressure roller and the line connecting the rotation center of the pressure roller and the backup roller is −15 ° ≦
It is preferably in the range of θ ≦ 25 °, and more preferably in the range of 0 ° ≦ θ ≦ 25 °. Where the angle θ is
The case where measurement is performed in the rotation direction of the contact pressure roll with respect to a line connecting the respective rotation centers of the contact pressure roll and the backup roll is defined as positive. When θ becomes larger than 25 °,
The wedge effect that increases the force for pressing the contact pressure roll against the backup roll or the sheet roll body increases the rotational resistance of the contact pressure roll and makes it difficult to suppress deflection in the contact pressure direction. When the angle θ is smaller than −15 °, the contact pressure roll is likely to fly out in the rotation direction of the sheet roll body due to a change in the winding tension and a rotational runout of the sheet roll body.

The outer diameter D (mm) and the surface length L (m) of the contact pressure roll
m) preferably satisfies D / L ≦ 0.048 when L> 1,000, satisfies D ≦ 48 when L ≦ 1,000, and further satisfies D / L when L> 1,000. / L ≦ 0.
035, and when L ≦ 1,000, it is preferable that D ≦ 35. When D and L are in the above relationship, the deflection of the contact pressure roll is reduced, so that the vibration of the contact pressure roll due to the fluctuation of the winding tension and the rotational runout of the sheet roll body is reduced, and Can be adjusted appropriately, so that a sheet roll body having a better winding shape can be manufactured. In addition, the natural frequency of the contact pressure roll is reduced, so that the rotation can be performed at a higher speed, and a polishing step or the like at the time of manufacturing the roll can be performed accurately.

Also, the Young's modulus E (Pa) of the contact pressure roll
, The second moment of area I (mm ⁴ ), and the surface length L (m
m) preferably satisfies the formula E × (I / L ⁴ ) ≧ 1.0 × 10 ³ . The value of E × (I / L ⁴ ) is 1.0 ×
By setting it to 10 ³ or more, the deflection of the contact pressure roll can be suppressed within a certain range, and a sheet roll body with less winding defects such as wrinkles can be manufactured.

As the shaft material of the contact pressure roll, a metal material such as steel or aluminum can be used, but if carbon fiber reinforced resin is used, weight reduction can be realized.
The rotation speed can be further increased. In particular, when using a carbon fiber reinforced resin having a Young's modulus of 250 GPa or more,
This is preferable because the outer diameter can be made smaller while suppressing the deflection of the contact pressure roll.

The surface of the contact pressure roll is preferably coated with, for example, acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), urethane rubber or the like, and is appropriately selected according to the properties of the sheet to be wound.

The above-described winding device according to the present invention can be suitably used for manufacturing a sheet roll body for winding a plurality of continuous sheets simultaneously. In particular, it can be suitably used in a step of dividing a sheet in the width direction and winding the sheet into a plurality of cores, such as a sheet slitting step. Further, as the sheet, a plastic film, paper, metal fabric, cloth, non-woven fabric, or the like can be used.

[0031]

EXAMPLE A sheet roll was manufactured using the winding device shown in FIGS. The sheet has a thickness of 10 μm and a width of 400
A biaxially stretched polyester film of 0 mm was divided into four parts, each having a size of 1,000 mm. As the contact pressure roll, an outer diameter D of 48 mm and a surface length L of 1100 mm in which rubber was coated on the outer periphery of a carbon fiber reinforced epoxy resin was used. The backup roll is hard chrome-plated on the surface of a carbon fiber reinforced epoxy resin pipe.
One having a thickness of 0 mm and a surface length of 4500 mm was used.

A backup roll and a contact pressure roll,
The angle θ determined by the rotation center of the winding means is such that the change from the start to the end of the winding is in the range of 3 to 2 °.

The evaluation was performed using a spring-type hardness tester (JIS
K6301 A class), and the winding hardness was measured at equal intervals at 10 points in the width direction of each sheet roll body. The average value of the winding hardness was used as an index of the air entrapment amount of the sheet roll body, and the difference between the maximum value and the minimum value of the winding hardness of each sheet roll body was used as an index of the pressing force uniformity. Table 1 shows the evaluation results.

Comparative Example 1 A sheet roll was manufactured in the same manner as in Example except that a backup roll was not used and a contact pressure roll having a pressure device was used. The contact pressure roll was a roll in which rubber was coated around a carbon steel pipe, and was pressed against the surface of the sheet roll body by an air cylinder (pressing device). Outer diameter D is 130mm, surface length is 110
0 mm. Table 1 shows the results.

(Comparative Example 2) A sheet roll was manufactured in the same manner as in Comparative Example 1, except that a contact pressure roll of the type shown in FIG. 2 was used. The contact pressure roll has a shaft arranged concentrically with an outer cylinder made of a carbon fiber reinforced epoxy resin pipe, and is connected at the center in the longitudinal direction, and the outer periphery is covered with rubber. Outer diameter D is 60 mm, surface length L is 1100 mm
It is. Table 1 shows the results.

[0036]

[Table 1]

[0037]

According to the present invention, the winding device includes a plurality of winding means, and a contact pressure roll provided for each of the winding means.
Since a backup roll is provided in common for each contact pressure roll, even if the winding width of the sheet is changed, it is only necessary to replace the roll with the contact pressure roll, greatly improving the work efficiency when changing the sheet width. Can be improved.

Further, when the drive means is connected to the backup roll, it is possible to suppress the application of excessive tension to the sheet due to the rotational resistance of the backup roll.

Further, when the winding means has means for urging the winding means toward the contact pressure roll,
An appropriate surface pressure can be applied to the roll sheet body, and a roll sheet body with less winding defects such as wrinkles can be manufactured. Furthermore, since the urging means is provided on the winding means side, it is possible to apply a surface pressure corresponding to the difference in the winding diameter between the sheet rolls.

In the case where the winding means and the contact pressure roll are arranged in a staggered manner with respect to the backup roll, the fixing means and the driving means are efficiently arranged at the ends of the winding means and the contact pressure roll. And the winding device can be made more compact.

Further, the angle θ formed between the line connecting the winding means and the rotation center of each of the contact pressure rolls and the line connecting the rotation center of each of the contact pressure roll and the backup roll is −1.
When the angle is in the range of 5 ° ≦ θ ≦ 25 °, it is possible to reduce the rotational resistance of the contact pressure roll and to prevent the contact pressure roll from popping out due to fluctuations in the winding tension and rotational fluctuation of the sheet roll body. Can be.

Further, by setting the outer diameter and the surface length of the contact pressure roll to predetermined values, the deflection of the contact pressure roll can be reduced, and the winding appearance of the sheet roll body can be improved.

Further, the Young's modulus of the contact pressure roll and the section 2
When the next moment and the surface length have a predetermined relationship,
The deflection of the contact pressure roll can be suppressed within a certain range, and a sheet roll having few winding defects such as wrinkles can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a conventional winding device.

FIG. 2 is a schematic front view (partially transparent view) of the winding device shown in FIG.

FIG. 3 is a schematic side view of a conventional winding device.

4 is a schematic front view of the winding device shown in FIG.

FIG. 5 is a schematic side view of a conventional winding device.

6 is a schematic front view of the winding device shown in FIG.

FIG. 7 is a schematic front view of a winding device according to an embodiment of the present invention.

8 is a schematic side view of the winding device shown in FIG.

FIG. 9 is a schematic front view of a winding device according to another embodiment of the present invention.

10 is a schematic side view of the winding device shown in FIG.

[Explanation of symbols]

 1: Contact pressure roll 2: Sheet 3: Backup roll 4: Roll sheet body 5: Backup roll 6: Contact pressure roll holding arm (holding means) 7: Chuck device (fixing means) 8: Air cylinder (biasing means) 9 : Driving means 11: Contact pressure roll 12: Roll shell 13: Shaft 15: Rubber coating 16: Contact pressure roll 17: Split backup roll 21: Backup roll 30: Winding means 40: Driving means 50: Core

Claims (8)

[Claims] 1. A winding device comprising: a plurality of winding means; a pressure roll provided for each of the winding means; and a backup roll provided commonly to each of the pressure rolls. Taking device. 2. The winding device according to claim 1, wherein driving means is connected to the backup roll. 3. The winding means has means for urging the winding means toward the contact pressure roll.
3. The winding device according to claim 1. 4. The winding roll and the contact pressure roll are arranged in a staggered manner with respect to the backup roll.
The winding device according to any one of the above. 5. An angle θ between a line connecting the rotation center of the winding roller and the rotation center of the pressure roller and a line connecting the rotation centers of the pressure roller and the backup roller is −15 ° ≦.
The winding device according to any one of claims 1 to 4, wherein the winding angle is in a range of θ ≦ 25 °. 6. An outer diameter D (mm) and a surface length L (m) of a contact pressure roll.
and m) satisfying D / L ≦ 0.048 when L> 1,000 and satisfying D ≦ 48 when L ≦ 1,000. Winding device. 7. The contact pressure roll has a Young's modulus E (Pa), a second moment of area I (mm ⁴ ), and a surface length L (mm) expressed by the formula E × (I / L ⁴ ) ≧ 1.0 × The winding device according to any one of claims 1 to 6, which satisfies 10 ³ . 8. A method for manufacturing a sheet roll body, comprising winding a sheet using the winding apparatus according to claim 1.