JP2002187649A - Web winding method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a web winding method and device in which winding condition is considerably excellent by preventing the web from damaging and prevent generation of irregular winding at an end face of a roll member obtained by winding the web. SOLUTION: At an initial state of the web winding, the winding is carried out by a winding tension command value T1 which is low by a length corresponding to a length of a core. Then, a tension is increased at a predetermined increasing rate, thereafter, the winding of the web is carried out while gradually decreasing the tension from a high winding tension command value T3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web winding method and apparatus for winding a web around a core and winding the web at a high speed.

[0002]

2. Description of the Related Art As a method of manufacturing a roll material such as a film or paper on a core and producing a good roll material without wrinkles or winding disorder, for example, winding with a contact pressure roller in close contact with the web. Is performed to eliminate the entrainment of air at the time of winding, and to obtain a good winding state (Japanese Patent Laid-Open No. 11-599).
No. 85).

However, in this prior art,
Since the contact pressure roller comes into direct contact with the web, the quality of a delicate material such as a film may be deteriorated.

Therefore, as a winding method that avoids deterioration of the quality of the web and does not cause wrinkles or the like, at the initial stage of winding the web, the winding tension is set to a low value of 70% or less of the basic winding tension. Take up with tension set,
There is a prior art in which the winding tension is rapidly returned to a high tension when the number of windings of the web becomes 1/10 of the final number of windings, and then the winding is performed while gradually reducing the winding tension (Japanese Patent Application Laid-Open No. Sho 60/1985). -112562).

However, in this prior art, since the web tension is rapidly switched from low tension to high tension, an excessive load is applied to the web, which may cause deterioration of the web. Also, as shown in FIG.
Since the deformation of the winding core a around which the web f is wound is not taken into account, there is a possibility that winding disturbance may occur on the end face b of the web f depending on the applied tension. That is, if the winding core a is curved during the winding of the web f, the web f is shaken in the axial direction of the winding core a, and the end face b is disturbed. If there is such a turbulence, the width L of the manufactured roll material fluctuates. For example, when the roll material is supplied to a subsequent process of light shielding packaging, a light shielding package that obtains a predetermined performance. (For example, light fog). Further, problems such as not being suitable for an image forming apparatus such as an image setter (for example, being unable to be inserted into a magazine) occur.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has been made without damaging the web, and also on the end face of a roll material obtained by winding the web. An object of the present invention is to provide a method and apparatus for winding a web in which the winding state is excellent without causing disturbance.

[0007]

In order to solve the above-mentioned problems, a web winding method according to the present invention is directed to a web winding method for winding a web around a core and winding at a high speed. The web is wound around the core at a low tension for a predetermined length, then the tension of the web is gradually increased at a predetermined increase rate, and after reaching a high tension, the web is wound while reducing the tension. It is characterized by taking.

Further, the web winding method of the present invention comprises:
In a web winding method of winding a web around a core and performing high-speed winding, the web is wound around the core by a predetermined length corresponding to the length of the core at a low tension, After setting the tension of the web to a high tension, the web is wound up while reducing the tension.

Further, the web winding device of the present invention comprises:
A web winding device that winds a web around a core and performs high-speed winding; a winding tension storage unit configured to store a winding tension corresponding to a winding length of the web by the core; The winding tension corresponding to a winding length is read from the winding tension storage means, a torque conversion means for converting the winding torque, and a winding core rotation control means for controlling the rotation of the winding core according to the winding torque, The winding tension comprises winding the web around the winding core at a low tension for a predetermined length, then gradually increasing the tension of the web at a predetermined increase rate, and after reaching a high tension, the tension is increased. Is set so as to wind up the web while reducing the number of webs.

Further, the web winding device according to the present invention is a web winding device for winding a web around a core and winding the web at a high speed, the web winding length corresponding to the web winding length by the core. Winding tension storage means for storing winding tension, torque converting means for reading out the winding tension corresponding to the winding length from the winding tension storage means, and converting the winding tension into winding torque, and according to the winding torque. Core rotation control means for controlling the rotation of the core, wherein the winding tension is such that the web is wound around the core by a predetermined length corresponding to the length of the core with low tension, After the web tension is increased, the web is wound up while reducing the tension. Is the fact characterized.

In this case, by winding a predetermined length of the web around the core with a low tension, a predetermined rigidity can be imparted to the core without deforming the core. In addition,
By setting the length of the web wound with low tension in accordance with the length of the winding core, it is possible to prevent poor quality such as "stepping" in the short winding core.

Next, after the tension is increased at a predetermined increasing rate, the web is wound while being reduced at a predetermined decreasing rate, so that an excessive addition is not given to the web and sufficient rigidity is obtained. The web can be wound around the provided core. As a result, it is possible to obtain a roll material of good quality without any winding disturbance on the end face of the obtained roll material and without any damage and no winding deviation.

[0013]

FIG. 2 is a schematic structural explanatory view of a film processing and cutting machine 12 according to an embodiment to which the web winding method and apparatus of the present invention are applied.

The film processing and cutting machine 12 is provided with a roll-shaped photosensitive material (hereinafter, referred to as a film roll 14) based on PET film, TAC film, PEN film, photographic paper, or the like. A film feeding device 18 for feeding the long film 16 by rotating while applying tension, and a transport device 20 for sequentially transporting the long film 16 to the next step
The long film 16 conveyed by the conveying device 20 is cut in the width direction, and the ear film is dropped to remove long films 24a to 24d having a predetermined width (in the present embodiment, four long films 24a to 24d). And a cutting device 26 for forming the film 24a to 24d. The long film 24a to 24d is wound around the cores 28a to 28d, and then cut into predetermined lengths. Wound body 3
Film winding device 10 for obtaining 0a to 30d
And an ear processing device 3 for processing unnecessary ears (film ears) 32 discharged from the long film 16.
4 is provided.

The film delivery device 18 includes a turret shaft 36 for indexably supporting a set of film rolls 14.
The film roll 14 is fed out by an unillustrated feeding motor. Transfer device 20
Is a suction drum 38 which is a main feed roller.
And a plurality of rollers 40. The speed of the suction drum 38 is controlled via a servomotor, which will be described later, so that the peripheral speed has a predetermined pattern.

Film roll 14 and suction drum 3
8, any one of the rollers 40 disposed between
A tension detector (tension pickup) 42 is mounted, and the film tension during this period is controlled by a tension motor 42 (not shown) mounted on the rotating shaft of the tension detector 42 and the film roll 14. On the turret shaft 36 side, an EPC sensor 44 for detecting and adjusting the position of the end of the long film 16 and joining the end of the long film 16 to the tip of a new long film 16. Is provided.

The cutting device 26 includes a plurality of sets of rotary cutters 48.
a, 48b, which are selectively disposed at cutting positions corresponding to the cutting width, and have a function of cutting the long film 16 into a desired width. Below the cutting device 26, separation rollers 50a and 50b for separating the cut long films 24a to 24d in directions different from each other are disposed, and a nip roller pair 52a is provided downstream of the separation rollers 50a and 50b. , 52b, the film winding device 10 is provided.

The film winding device 10 is provided with two sets of right and left in FIG. 2 corresponding to the long films 24a to 24d, respectively, and is capable of holding and rotating the cores 28a to 28d. A mechanism 58 and a plurality of block wrappers 60 for winding the long films 24a to 24d around the cores 28a to 28d to a predetermined length to obtain wound bodies 30a to 30d.
A product receiving mechanism 64 that grips the peripheral surfaces of the long films 24a to 24d wound around the cores 28a to 28d in a state where tension is applied thereto and that can relatively be separated from the block wrapper 60; When the tension is applied to the long films 24a to 24d by the product receiving mechanism 64, the long films 24a to 24d
And a cutting mechanism 66 for cutting 4d in the width direction.

The schematic operation of the film processing and cutting machine 12 thus configured will be described below.

The film roll 14 mounted on the film delivery device 18 is rewound under the rotation of a delivery motor (not shown), and the long film 16 is guided to a suction drum 38 constituting the transfer device 20. The speed of the suction drum 38 is controlled by a predetermined speed pattern under the action of a servo motor described later, and the transport length (winding length) of the long film 16 is detected via an encoder (not shown).

The long film 16 whose speed has been adjusted by the suction drum 38 is sent to the cutting device 26, and the ears 32 at both ends are cut under the action of the rotary cutters 48a and 48b, and the predetermined width is set. The four long films 24a to 24d are transported to the film winding device 10.

In the film winding device 10, the suction drum 38 rotates while the outer peripheral surfaces of the cores 28 a to 28 d are held by the block wrapper 60, and the respective cores 28 a ~ 2
8d is rotated. For this reason, the long films 24a to 24d are wound around the outer peripheral surfaces of the cores 28a to 28d, and after the block wrapper 60 is separated from the cores 28a to 28d, the long films 2
4a to 24d are wound up to a predetermined length,
a to 30d are obtained.

Next, the product receiving mechanism 64 is raised to hold the wound bodies 30a to 30d, and the wound bodies 30a to 30d are held.
Falls while unwinding the long films 24a to 24d. Then, the cutting mechanism 66 is driven, and the long film 2 is moved.
4a to 24d are cut (cross cut) in the width direction.
As a result, products including the wound bodies 30a to 30d are obtained, and each product is supplied to the next step. On the other hand, new winding cores 28a to 28d are automatically supplied to the block wrapper 60, and the next winding and winding operations are started again.

Incidentally, when the long films 24a to 24d are wound and wound as described above, unless the tension applied to the long films 24a to 24d is properly adjusted, excessive tension occurs. When applied, the long films 24a to 24d may be damaged, or the obtained wound bodies 30a to 30d may be loosened or disturbed. In the present embodiment, these problems can be avoided by configuring and controlling the film winding device 10 as described below.

FIG. 3 shows a block diagram of a control circuit 1000 in the film winding device 10. Control circuit 1
000 denotes a speed control unit 1002 for controlling the rotation speed of the suction drum 38, and speed / torque control units 1004a to 1004d for controlling the rotation speed and the rotation torque of each of the cores 28a to 28d in the core rotation mechanism 58. Control means).

A process control computer 1008 is connected to the control circuit 1000 via an input unit 1006. A management computer 1010 is connected to the process control computer 1008. Process control computer 10
08 controls the process of the film winding device 10.
The film cutting machine 12 is provided with a process control computer for each process. Management computer 101
0 performs overall management of each process control computer connected to the film processing and cutting machine 12.

The speed control unit 1002 includes an output unit 1012
The motor driver 1014 is connected via the. The motor driver 1014 is connected to a servomotor 1016 that drives the suction drum 38 to rotate. in this case,
The speed control unit 1002 includes a process control computer 100
A speed command value memory 1018 for storing a speed command value supplied from the servo motor 1016;
Is driven and controlled according to the speed command value.

Speed / torque control units 1004a to 1004
Motor drivers 1026a to 1026d are connected to d via output units 1024a to 1024d. The motor drivers 1026a to 1026d include cores 28a to 2
Servo motors 1028a to 1028d for winding the long films 24a to 24d are connected via 8d. In this case, the speed / torque control sections 1004a to 1004a
4d stores speed command value memories 1030a to 1030a to store speed command values supplied from the process control computer 1008.
A winding tension command value memory 1032a to 1030d to which a winding tension command value supplied from the process control computer 1008 is stored.
1032d (winding tension storage means) is connected via torque conversion units 1034a to 1034d (torque conversion means). Servo motors 1028a to 1028d
Are the speed command values supplied from the speed / torque control units 1004a to 1004d and the torque conversion units 1034a to 1034a
Drive control is performed in accordance with the winding torque command value converted by 34d.

Next, the control circuit 1 configured as described above
000 will be described.

Prior to the winding operation of the long films 24a to 24d in the film winding device 10, the process control computer 1008 stores the speed command value memory 101.
8. Speed command value memory 1030a to 1030d and winding tension command value memory 1032a to 1032d
, A preset speed command value and a winding tension command value are stored.

The upper part of FIG.
The relationship between the speed command value for the servomotor 1016 and the time stored in 018 is shown. The lower part of FIG. 4 is related to the winding tension command value memories 1032a to 1032a.
The relationship between the winding tension command value for the long films 24a to 24d stored in 32d and the time is shown. The speed command value memories 1030a to 1030d store constant speed command values for the servo motors 1028a to 1028d.

First, the speed / torque control units 1004a to 1004a-1
004d is a speed command value memory 1030a to 1030d
From the output unit 1024a-
Motor drivers 1026a to 1026d from 1024d
, A driving signal based on the speed command value is supplied to the servomotors 1028a to 1028d, and the winding cores 28a to 28d
To rotate. Further, torque conversion units 1034a to 1033
4d is a winding tension command value memory 1032a-
The constant winding tension command value T1 shown in FIG.
1 is converted into a torque command value, and the speed / torque control unit 100
4a to 1004d. Speed / torque control unit 10
04a to 1004d are torque conversion units 1034a to 1034d.
The servo motor 10 is controlled by the torque command value supplied from the
Motor driver 1 so that 28a to 1028d rotate.
026a to 1026d.

After the core rotating mechanism 58 is adjusted to the above state, at time t1, the speed control unit 1002 reads the speed command value from the speed command value memory 1018 and outputs a drive signal based on the speed command value to the output unit. The motor is supplied from 1012 to a servomotor 1016 via a motor driver 1014 to rotate the suction drum 38. In this case, after being accelerated from time t1 to time t2, the suction drum 38 rotates at a constant speed v1 to send out the long film 16 to the film winding device 10.

The long film 16 sent out by the suction drum 38 is cut by the cutting device 26 into four long films 24a to 24d, and then the core rotation of the film winding device 10 is completed. It is supplied to the mechanism 58. Next, the servo motors 1028a-
The winding of the long films 24a to 24d around the rotating cores 28a to 28d is started by 1028d. In this case, the servo motors 1028a to 1028d
Is controlled so as to obtain a torque value equal to a constant torque command value obtained by converting the constant winding tension command value T1, so that the long films 24a to 24d are attached to the winding cores 28a to 28d. When the film is wound, a constant winding tension T1 is applied to the long films 24a to 24d.

Next, the speed control unit 1002 reads the speed command value from the speed command value memory 1018, and at time t3
From time t6 to when the speed v
The long film 16 is accelerated from 1 to v2 and rotated to send out the long film 16 to the film winding device 10.

On the other hand, speed / torque control units 1004a-1
004d is, from time t4 to time t5 set according to the length of the winding cores 28a to 28d, from the winding tension command value T1 read from the winding tension command value memories 1032a to 1032d to the winding cores 28a to 28d. The take-up tension command values gradually increasing up to the take-up tension command value T3 set according to the length are converted into torque command values by the torque conversion units 1034a to 1034d, and the command values are converted into the motor drivers 1026a to 1022.
6d to control the servo motors 1028a to 1028d. As a result, the long films 24a to 24d
The winding is wound around the winding cores 28a to 28d by the winding tensions T1 to T3 that gradually increase.

At time t5, the speed / torque controllers 1004a to 1004d take up the long films 24a to 24d while gradually decreasing the torque command value from the value corresponding to the take-up tension command value T3. Do.

During this time, the acceleration of sending out the long film 16 by the servo motor 1016 based on the command from the speed control unit 1002 gradually decreases, and at time t6,
The speed command value from speed controller 1002 is set to a constant speed command value v2. This speed command value v2 is obtained at time t7
After that, the speed is reduced again. At time t8, the speed becomes the speed command value v1, and becomes 0 at time t9.

On the other hand, speed / torque control units 1004a-1
004d indicates that the torque command value is gradually reduced from a value corresponding to the winding tension command value T3 to a value corresponding to the winding tension command value T2 from time t5 to time t9, and then the winding tension command value T1 is set. Is the torque command value corresponding to.

As described above, the long films 24a to 24a-2
While adjusting the tension applied to 4d, the cores 28a to 28
By performing the winding operation on 8d, favorable winding bodies 30a to 30d can be obtained.

That is, in the state where the long films 24a to 24d are wound around the cores 28a to 28d, the winding tension command value T1 applied to the long films 24a to 24d is kept low.
In this case, since no large external force is applied to the cores 28a to 28d to which sufficient rigidity is not provided by the long films 24a to 24d, the cores 28a to 28d do not bend. Shaku film 24a-24d
Is wound around the winding cores 28a to 28d in a favorable state.

Next, when the long films 24a to 24d of a predetermined length are wound around the cores 28a to 28d,
The cores 28a to 28d are provided with rigidity and are hardly bent. Therefore, by switching the tension of the long films 24a to 24d to the high winding tension command value T3, the long films 24a to 24d can be wound at high speed without becoming unstable due to loosening. In this case, for the long cores 28a to 28d, the lengths of the long films 24a to 24d wound with the low winding tension command value T1 are set to be long so that the cores 28a to 28d are not bent. The long films 24a to 24d can be wound. Further, since the short winding cores 28a to 28d have sufficient rigidity in advance, the low winding tension command value T1
By setting the lengths of the long films 24a to 24d to be wound to be short and setting the high winding tension command value T3 after switching high, there is no occurrence of winding deviation during winding and a good winding state. Can be obtained.

Further, in this embodiment, when the winding tension command value is increased from T1 to T3, the command value is gradually increased at a predetermined increasing rate without giving a sudden tension fluctuation. Film 24a ~
24d is wound around the winding cores 28a to 28d without damage.

Next, after the tension of the long films 24a to 24d has reached the winding tension command value T3, the winding operation is performed while gradually decreasing the tension, whereby the winding displacement and the winding body 30a are reduced. ~ 30d
The winding surfaces 30a to 30d in an extremely good wound state can be obtained without the occurrence of turbulence in the end faces of the winding members.

The winding tension command value memory 1
The winding tension command values stored in 032a to 1032d are individually set for each of the winding bodies 30a to 30d,
Of course, it can be controlled independently.

Next, an embodiment under specific winding conditions will be described.

First Embodiment A core 28a having a length of 1220 mm and an outer diameter of 3 inches is used.
Long film 24a-2 with a width of 1220 mm by 28d
When winding 4d, tension T1 = 7.84N / 1
After winding 8 m (about 30 rounds) at 00 mm, winding was performed to 10 m while gradually increasing the tension from T1 to tension T3 = 17.64 N / mm. Then 2
While gradually decreasing the tension T3 at a rate of 0%, 6
The long films 24a to 24d were wound up to 1 m to obtain wound bodies 30a to 30d. The winding number at low tension T1 is about 15% of the total winding number.

In the first embodiment, although the winding cores 28a to 28d are long and flexible, the winding body 30
The turbulence of the end faces a to 30d is 0.5 m, which is the target value.
m, no winding deviation, and a sufficiently good winding state was obtained.

Second Embodiment Cores 28a to 2 having a length of 150 mm and an outer diameter of 3 inches
Elongated film 24a to 24d with a width of 150mm by 8d
Is wound, tension T1 = 7.84 N / 100
After winding about 1/2 circumference of the cores 28a to 28d in mm,
Tension from T1 to T3 = 24.5N / m
m and wound up. Next, the long films 24a to 24d are wound up to 61m while gradually reducing the tension T3 at a rate of 20%, and the wound body 30a is wound.
~ 30d was obtained. The winding number at low tension T1 is about 0.5% of the total winding number.

In the second embodiment, since the winding cores 28a to 28d are short and hard to bend, the long films 24a to 24d can be wound with a high tension from the initial stage of the winding start, and furthermore, the windings are not easily disturbed. Good winding bodies 30a to 30d with no winding deviation were obtained.

Other examples are shown in Table 1 below. In these embodiments, the inner diameter of the cores 28a to 28d is 73.7 mm, the outer diameter is 77.9 mm, and the length is 0.5 to 1.0 times smaller than the width of the long films 24a to 24d.
mm shorter one was used. Core 28 with low tension T1
By setting the lengths of the long films 24a to 24d to be wound around the a to 28d with respect to the entire length of the wound bodies 30a to 30d as shown in Table 1, the wound bodies 30a to 30d are set.
Was able to be suppressed to the allowable range of 0.5 mm.

[0052]

[Table 1]

[0053]

As described above, according to the present invention, after the tension is reduced at the beginning of winding, the web is wound while increasing the tension at a predetermined increasing rate, and then gradually decreasing the tension from the high tension. By doing so, it is possible to obtain a roll material in an extremely good state without damaging the web and without turbulence in the end face.

Further, by setting the winding length at a low tension in accordance with the length of the core and performing the winding, the web can be more preferably wound without bending of the core.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a state in which a web is wound around a core to produce a roll material.

FIG. 2 is a schematic structural explanatory view of a film processing and cutting machine to which the web winding method and apparatus of the present invention are applied.

FIG. 3 is a block diagram showing a configuration of a control circuit centering on a film winding device in the film processing and cutting machine shown in FIG. 2;

4 is an explanatory diagram showing a relationship between a film feeding speed command value and a winding tension command value in a control circuit of a film winding device in the film cutting machine shown in FIG. 2;

DESCRIPTION OF SYMBOLS 10 ... Film take-up device 12 ... Film processing and cutting machine 14 ... Film roll 18 ... Film sending device 20 ... Transport device 24a-24d ... Long film 26 ... Cutting device 28a-28d ... Core 30a-30d ... winding body 32 ... ears 34 ... ears processing device 38 ... suction drum 58 ... winding core rotating mechanism 60 ... block wrapper 64 ... product receiving mechanism 66 ... cutting mechanism 1000 ... control circuit 1002 ... speed control section 1004a-1004d ... Speed / torque control unit 1016 Servo motor 1018 Speed command value memory 1028a to 1028d Servo motor 1030a to 1030d Speed command value memory 1032a to 1032d Winding tension command value memory 1034a to 1034d Torque conversion unit

Claims (7)

[Claims] 1. A web winding method for winding a web around a core and winding the web at high speed, wherein the web is wound around the core with a low tension for a predetermined length, and then the tension of the web is increased. Is gradually increased at a predetermined increasing rate, and after reaching a high tension, the web is wound while reducing the tension. 2. A web winding method for winding a web around a core and winding the web at a high speed, wherein the web has a predetermined length corresponding to the length of the core with a low tension relative to the core. Winding the web after setting the tension of the web to a high tension, and then winding the web while reducing the tension. 3. The method according to claim 1, wherein the predetermined length of the web wound around the core with the low tension is longer for the longer core and smaller for the shorter core. A web winding method characterized by being set to a shorter length. 4. The method according to claim 1, wherein the predetermined length of the web wound around the core with the low tension is set to be not more than 15% of a winding length of the web. Web winding method. 5. A winding device for winding a web around a winding core and winding the web at a high speed, wherein a winding tension storing a winding tension corresponding to a winding length of the web by the winding core. Means, a torque conversion means for reading the winding tension corresponding to the winding length from the winding tension storage means, and converting the winding tension into a winding torque, a winding core rotation for controlling rotation of the winding core according to the winding torque. Control means, and the winding tension is such that the web is wound around the core at a low tension by a predetermined length, and then the tension of the web is gradually increased at a predetermined rate of increase to a high tension. After reaching, the web is set to be wound up while reducing the tension. Winding device. 6. A web winding device for winding a web around a core and winding the web at a high speed, wherein a winding tension storage for storing a winding tension corresponding to a winding length of the web by the core. Means, torque conversion means for reading the winding tension corresponding to the winding length from the winding tension storage means, and converting the winding tension into winding torque; core rotation for controlling rotation of the winding core according to the winding torque. Control means, and the winding tension is relative to the winding core,
The web is wound at a low tension by a predetermined length corresponding to the length of the winding core, and then, after setting the tension of the web to a high tension, the web is set to be wound up while reducing the tension. Characteristic web winding device. 7. The winding tension storage means according to claim 5, wherein said winding device is configured so that a plurality of webs obtained by cutting the web can be wound simultaneously by respective winding cores. Storing a winding tension for each of the webs, wherein the winding core rotation control means independently controls the rotation of each of the winding cores in accordance with the winding tension.