JPH07285717A - Band material winding device - Google Patents

Abstract

PURPOSE:To provide a strip material winding device, which can securely and accurately control the tension at a high speed and which has the structure without giving a damage to a strip material. CONSTITUTION:A dancer roller 10 contacts with a strip material 1, which is to be wound up by a winding shaft 8, and gives the tension to the strip material 1 at a position in this side of the winding shaft 8, and winds up the strip material 1, controlling the tension of the strip material 1 between the dancer roller 10 and the winding shaft 8. A means for controlling the quantity of the strip material 1 to be supplied to the dancer roller 10 in response to the strip material 1 winding condition of the winding shaft 8 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt-shaped material winding device suitable for winding an electrode material in a lithium-ion secondary battery manufacturing process, for example.

[0002]

2. Description of the Related Art FIG. 4 is a schematic diagram showing an example of an electrode winding device for winding an electrode material in a conventional process for manufacturing a lithium ion secondary battery. In FIG. 4, reference numeral 101 is a strip-shaped material obtained by applying a lithium compound to a base material such as a copper foil or an aluminum foil in the previous step. The strip-shaped material 101 is wound around a supply shaft 102 together with a reel. It is supplied and set in a state of being wound on a reel. Further, the strip-shaped material 101 set on the supply shaft 102 together with the reel is guided to the guide roller 103, the conveyance roll 104, and the guide rollers 105, 106 and 107, respectively, and wound around the reel set on the winding shaft 108. It is wound by this winding shaft 108. In addition,
On the winding shaft 108, the strip material A101, the separator A109, the strip material B101, and the separator B109 are sequentially stacked, and a total of four strips of two types of strip materials 101 and two separators 109 are simultaneously formed. It is configured to be wound up.

By the way, in such a winding method, when the strip-shaped material 101 is wound around the winding reel 108 at a high speed, there is a possibility that winding misalignment or winding tightness may occur. Therefore, in this type of device, the guide roller 106 and the guide roller 10 are
It is necessary to wind a portion 115 of the strip-shaped material 101 between 7 and 7 while applying a substantially constant tension.
A tension control device is incorporated as a means for keeping the tension of 15 constant.

To further explain the detailed structure of this tension control device, 110 is a dancer roller for forming a loop 111 of the strip 101 between the guide rollers 105, 106. The dancer roller 110 is driven by a dancer roller driving motor 112 so that the belt-shaped material 101 can be conveyed to the take-up reel 108 side, and can also be moved up and down to increase or decrease the size of the loop 111. ing. 113 is a dancer roller drive motor 112
A current controller for controlling the current supplied to the roller to adjust the speed, 114 is a tension detector for detecting the tension of a portion 115 of the strip 101 existing between the guide rollers 106 and 107, and 116 is a tension detector. The tension control device outputs a tension correction signal TC based on the deviation between the tension detection value T detected by the tension detector 114 and the tension set value TR.

Reference numeral 117 denotes a roll driving motor for driving the conveying roll 104 adjacent to the dancer roller 110, 118 denotes a speed control device for controlling a current supplied to the roll driving motor 117 to adjust the speed. Reference numeral 119 is a position detector for detecting the position of the dancer roller 110, and 120 is a position control device for outputting a position correction signal PC based on the deviation between the position detection value P and the position set value PR from the position detector 119.

Next, the operation of the tension control device will be described. First, the tension of the portion 115 of the strip 101 is determined by the tension detector 11
The tension detection value T detected by the tension detector 114 and the tension detection value TR separately set and prepared are input to the tension control device 116. And
The tension control device 116 outputs a tension correction signal TC based on the deviation between the tension detection value T and the tension setting value TR. Also,
When the tension correction signal TC is output, the current reference value IR is corrected, and the corrected current reference value IR1 is input to the current control device 116. Then, the current control device 116
Then, the supply current to the dancer roller driving motor 112 is controlled based on the corrected current reference value IR1. As a result, the position of the dancer roller 110 is moved in the vertical direction, and the movement of the dancer roller 110 causes the loop 111 to increase or decrease, and the tension in the portion 115 of the strip 101 is corrected.

On the other hand, the vertical position of the dancer roller 110, that is, the increase / decrease of the loop 111, depends on the dancer roller 11
It can be known by detecting the position of 0 with the position detector 119. Then, the position detection value P detected by the position detector 119 and the position set value P separately prepared and prepared.
R and R are input to the position control device 120. Then, the position control device 120 outputs the position correction signal PC based on the deviation between the position detection value P and the position setting value PR. Further, the speed reference value VR is corrected by the position correction signal PC, the corrected speed reference value VR1 is input to the speed control device 118, and the roll driving motor 109 of the roll driving motor 109 is based on the corrected speed reference value VR1. The speed is controlled, and the transport roll 10
The belt-shaped material conveyance speed of 4 is adjusted. Then, this adjustment corrects the positional deviation of the dancer roller 110.

[0008]

However, in the above-mentioned conventional apparatus, when the strip-shaped material 101 having the base material coated with the lithium compound is transported, the strip-shaped material 101 is transported to the transport roll 104 and the dancer roller 110. Has a small coefficient of friction. Therefore, there is a problem that slips occur in the transport roll 104 and the dancer roller 110, and the tension in the portion 115 and the position of the dancer roller 110, that is, the increase and decrease of the loop 111 are not corrected accurately. Further, in the above-described conventional apparatus, the tension is controlled by utilizing the contact resistance between the strip-shaped material 101, the transport roll 104, and the dancer roller 110.
There is also a problem in that 01 is burdened and the strip 101 may be damaged.

The present invention has been made in view of the above problems, and an object thereof is to control the tension accurately and at high speed, and to wind the belt-shaped material in a structure that does not damage the belt-shaped material. It is to provide a picking device. Furthermore, other purposes will be clarified one after another in the content described below.

[0010]

According to the present invention, a tension roller is contacted with a dancer roller at a position on the front side of the take-up shaft to a band-shaped band-like material which is taken up by the take-up shaft. In the band-shaped material winding device that winds while controlling the tension of the band-shaped material between the dancer roller and the winding shaft to be constant, on the upstream side of the dancer roller,
This is achieved by providing means for controlling the amount of the strip-shaped material supplied to the dancer roller side in accordance with the state in which the winding shaft winds up the strip-shaped material.

[0011]

According to this, the strip-shaped material is supplied to the dancer roller side in accordance with the state in which the strip-shaped material of the winding shaft is wound up. Therefore, the coefficient of friction of the strip-shaped material with respect to the dancer roller is reduced and the load on the strip-shaped material is reduced. be able to. In addition, unlike the conventional method in which tension is controlled by contact resistance, the belt-shaped material can be wound without directly applying a load, so that the belt-shaped material is not damaged. Furthermore, since tension can be directly applied to the winding shaft, tension control with high-speed response can be performed, and winding deviation and winding tightening can be prevented during high-speed winding.

[0012]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a strip-shaped material winding device shown as an embodiment of the present invention, in which an electrode winding device for winding an electrode in a lithium-ion secondary battery manufacturing process is taken as an example.

In FIG. 1, reference numeral 1 is a strip-shaped material obtained by applying a lithium compound to a base material such as copper foil or aluminum foil in the previous step. The strip-shaped material 1 is formed in a strip shape and wound around a supply reel, and is set on the supply shaft 2 together with the supply reel. Further, the strip-shaped material 1 set on the supply shaft 2 together with the reel includes the guide roller 3, the transport roll 4, the guide rollers 5a, 5b, 5c, 5d and 5e.
Is wound around a reel set on a take-up shaft 8 which is guided by the motor and is rotated by a motor (not shown), and is taken up by the take-up reel. In this case, the winding reel on the winding shaft 8 has a state in which the strip A1, the separator A9, the strip B1, and the separator B9 are sequentially stacked.
A total of four sheets of the two kinds of strip materials 1 and two separators 9 are stacked and wound up at the same time. Then, the strip-shaped material 1 thus wound on the reel on the winding shaft 8 is conveyed to the next assembly step in the element state after being subjected to taping for preventing unwinding. Here, even in this winding method, when the strip-shaped material 1 is wound around the winding reel 8 at high speed, there is a possibility that winding deviation or winding tightening may occur. Therefore, also in the apparatus of the present embodiment, the tension for winding the strip 1 around the take-up reel 8 while always controlling the tension of the portion 15 of the strip 1 between the guide roller 5d and the guide roller 5e. The control unit is incorporated.

To further explain the detailed structure of the tension control device, 10 is a strip-shaped member 1 between the guide rollers 5c and 5d.
Is a dancer roller for forming the loop 11, and the dancer roller 10 is provided with a roller 10b which is brought into contact with the strip 1 at the tip of a lever 10a. Also, lever 1
The base end of 0a is attached to a torque control type servomotor 12. By driving the servo motor 12, the lever 10a is vertically driven like a pendulum to adjust the position of the roller 10b in the vertical direction, and by this position adjustment, the size of the loop 11 can be increased or decreased. . Reference numeral 13 is a current control device for controlling the current supplied to the servomotor 12, which is formed as a microcomputer board having a CPU. 14 is a guide roller 5d,
5e is a tension detector for detecting the tension of the portion 15 of the strip-shaped material 1 existing between 5e and 5e, which is, for example, a tension regulator and is formed as a microcomputer board having a CPU. Reference numeral 16 is a tension control device that outputs a tension correction signal TC based on the deviation between the tension detection value T detected by the tension detector 14 and the tension set value TR, and is formed as a microcomputer board having a CPU.

Reference numeral 17 denotes a buffer unit formed between the guide rollers 5a and 5b. The roller 17a is vertically moved by a linear motor, that is, a linear motor 17b, and the vertical movement of the roller 17a causes the inside of the buffer unit 17 to move. The belt-shaped material 1 is stored in the winding shaft 8 in a predetermined length. Reference numeral 18 is a speed control device for controlling the current supplied to the linear motor 17b of the buffer unit 17, and 19 is a position detector for detecting the position of the dancer roller 10, for example, an absolute type encoder, which rotates the lever 10. It is attached to the shaft. 20 is a position correction signal P based on the deviation between the position detection value P from the position detector 19 and the position set value PR.
A position control device that outputs C, which is formed as a microcomputer board having a CPU. Reference numeral 21 is a stopper composed of a cylinder that is operated by air pressure, and is a guide roller 5a.
The strips 1 are arranged on the upper side so as to be in contact with and away from each other, and the strips 1 cannot be pulled out from the supply reel 2 when the ends of the stoppers 21 are brought into contact with the guide rollers 5a. Become. A speed detector 22 is attached to the rotation shaft of the winding shaft 8 to measure the rotation speed of the winding shaft 8. For example, an incremental type encoder is used.

Next, the operation of the strip material winding device will be described.
In the winding method here, the strip-shaped material 1 drawn from the reel on the supply shaft 2 is once stored in the buffer unit 17, and the strip-shaped material 1 stored in the buffer unit 17 is mounted on the winding shaft 8. It is adapted to be wound on a reel, and when wound on the winding shaft 8 side, the tip of the stopper 21 is pressed against the guide roller 5a to press the strip-shaped material 1, and the roller 17a in the buffer unit 17 is driven by the linear motor 17b. While being moved upward by this, the strip-shaped material 1 corresponding to the moved amount is unreeled from the buffer unit 17 and wound up on the winding shaft 8 side. When the strip 1 in the buffer unit 17 is used up, the winding of the winding shaft 8 is stopped or rotated at a low speed, and the strip 1 is stored again in the buffer unit 17 from the supply shaft 2 side. In this case, the tip of the stopper 21 is set apart from the guide roller 5a, and the roller 17a is moved downward by the linear motor 17b. This movement moves the strip 1 for the next winding to the supply reel 2 side. A method is adopted in which it is further drawn out and supplied into the buffer unit 17.

The tension of the portion 15 of the strip 1 is detected by the tension detector 14, and the tension detection value T detected by the detector 14 and the tension set value TR which is separately set and prepared are tension controlled. Input to the device 16. Further, the tension control device 16 outputs a tension correction signal TC based on the deviation between the tension detection value T and the tension setting value TR. Further, when the tension correction signal TC is output, the current reference value IR is corrected, and the corrected current reference value IR1 is input to the current control device 16. Then, in the current control device 16,
Servo motor 12 based on the corrected current reference value IR1
The supply current to is controlled. As a result, the position of the dancer roller 10 is moved in the vertical direction, and the dancer roller 1
With the movement of 0, the loop 11 is increased or decreased and the tension in the portion 15 of the strip 1 is corrected.

On the other hand, the vertical position of the dancer roller 10, that is, the increase / decrease of the loop 11, can be known by detecting the position of the dancer roller 10 by the position detector 19. Then, the position detection value P detected by the position detector 19 and the position setting value PR that is separately set and prepared are input to the position control device 20. Then, the position control device 2
0 outputs the position correction signal PC based on the deviation between the position detection value P and the position setting value PR. In addition, this position correction signal P
The speed reference value VR is corrected by C, the corrected speed reference value VR1 is input to the speed control device 18, and the roller 17a is moved upward by the linear motor 17b of the buffer unit 17 based on the corrected speed reference value VR1. The speed of the dancer roller 10 is controlled, and the positional deviation of the dancer roller 10 is corrected by this control.

Therefore, in the strip-shaped material winding device of this embodiment, the strip-shaped material 1 can be supplied from the buffer unit 17 to the dancer roller 10 side according to the state in which the winding shaft 8 winds up the strip-shaped material 1. The coefficient of friction of the strip 1 with respect to the dancer roller 10 can be reduced to reduce the load on the strip 1. Further, since the strip-shaped material 1 can be wound without directly applying a load, the strip-shaped material 1 is not damaged. Furthermore, since tension can be directly applied to the winding shaft 8, it is possible to perform tension control with high-speed response, and it is also possible to prevent winding deviation and winding tightening during high-speed winding.

FIG. 2 is a schematic configuration diagram showing a modified example of the strip-shaped material winding device of the present invention. In FIG. 2, the same reference numerals as those in FIG. 1 denote the same parts as those in FIG. In this modification, the supply shaft 2 is provided with a speed detector 31 for detecting the rotation speed of the supply shaft 2, and the speed detector 31 is provided.
The signal VR2 obtained in step 2 is input to the speed control device 18, and the stopper 2 used in the embodiment shown in FIG.
1, the strip-shaped material 1 is continuously accumulated from the reel on the supply shaft 2 once in the buffer unit 17,
Next, the buffer unit 17 is continuously supplied to the winding shaft 8 side so that the operations from supply to winding can be continuously performed.

Also in the case of the modified example, the tension of the portion 15 of the strip 1 is detected by the tension detector 14, and the tension setting value prepared separately from the tension detection value T detected by the detector 14 is set. The value TR and the value TR are input to the tension control device 16. Further, the tension control device 16 outputs a tension correction signal TC based on the deviation between the tension detection value T and the tension setting value TR. Further, when the tension correction signal TC is output, the current reference value IR is corrected, and the corrected current reference value IR1 is input to the current control device 16. Then, the current control device 16 controls the supply current to the servo motor 12 based on the corrected current reference value IR1. As a result, the position of the dancer roller 10 is moved in the vertical direction,
By this movement of the dancer roller 10, the loop 11 is increased or decreased, and the tension in the portion 15 of the strip 1 is corrected.

On the other hand, the vertical position of the dancer roller 10, that is, the increase / decrease of the loop 11, can be known by detecting the position of the dancer roller 10 by the position detector 19. Then, the position detection value P detected by the position detector 19 and the position setting value PR that is separately set and prepared are input to the position control device 20. Then, the position control device 2
0 outputs the position correction signal PC based on the deviation between the position detection value P and the position setting value PR. Further, the speed detector 31 also outputs a signal VR2 corresponding to the speed of the supply shaft 2, and the speed reference value V is obtained by the speed signal VR2 and the position correction signal PC.
R is corrected, the corrected speed reference value VR1 is input to the speed control device 18, and the linear motor 17b of the buffer unit 17 controls the speed at which the roller 17a rises based on the corrected speed reference value VR1. The position deviation of the dancer roller 10 is corrected by this control.

FIG. 3 is a schematic structural view showing another modification of the belt-shaped material winding device of the present invention. In FIG. 3, the same reference numerals as those in FIG. 1 denote the same parts as those in FIG. In this modification, the supply shaft 2 is provided with a motor 32 for driving the supply shaft 2 to rotate, and the motor 32 is controlled by the speed control device 18 and used in the embodiment shown in FIG. The buffer unit 17 and the stopper 21 that have been used are eliminated, so that the strip-shaped material 1 is continuously supplied from the reel on the supply shaft 2 to the winding shaft 8 side, and is wound from the supply without using the buffer unit. It is designed so that the operations up to the point of delivery can be performed continuously.

Also in the case of this modification, the strip 1
The tension of the portion 15 is detected by the tension detector 14, and the tension detection value T detected by the tension detector 14 and the tension set value TR separately set and prepared are input to the tension control device 16. Further, the tension control device 16 outputs a tension correction signal TC based on the deviation between the tension detection value T and the tension setting value TR. Further, when the tension correction signal TC is output, the current reference value IR is corrected, and the corrected current reference value IR1 is input to the current control device 16. Then, in the current control device 16, the corrected current reference value IR1
The current supplied to the servomotor 12 is controlled based on As a result, the position of the dancer roller 10 is moved in the vertical direction, and the movement of the dancer roller 10 increases or decreases the loop 11 to correct the tension in the portion 15 of the band-shaped material 1.

On the other hand, the vertical position of the dancer roller 10, that is, the increase / decrease of the loop 11, can be known by detecting the position of the dancer roller 10 by the position detector 19. Then, the position detection value P detected by the position detector 19 and the position setting value PR that is separately set and prepared are input to the position control device 20. Then, the position control device 2
0 outputs the position correction signal PC based on the deviation between the position detection value P and the position setting value PR, the speed reference value VR is corrected by this position correction signal PC, and the corrected speed reference value VR is obtained.
1 is input to the speed control device 18. Then, the motor 32 is controlled by the speed control device 18 based on the corrected speed reference value VR1, and thereby the amount of the strip-shaped material fed from the supply shaft 2 side is controlled, and the position deviation of the dancer roller 10 is controlled by this control. Is fixed.

In the above embodiment, the electrode winding device for winding the electrode material in the manufacturing process of the lithium ion secondary battery has been described, but the same can be applied to the case of winding other strip materials. Is.

[0027]

As described above, according to the belt-shaped material winding device of the present invention, the belt-shaped material is supplied to the dancer roller side in accordance with the state of winding the belt-shaped material of the winding shaft. It is possible to reduce the coefficient of friction of and reduce the load on the belt-shaped material. Further, unlike the conventional method in which tension is applied by contact resistance to control, the strip-shaped material can be wound without directly applying a load, so that the strip-shaped material is not damaged. Furthermore, since tension can be directly applied to the winding shaft, tension control with high-speed response can be performed, and winding deviation and winding tightening can be prevented during high-speed winding.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a strip-shaped material winding device shown as an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a belt-shaped material winding device shown as a modified example of the present invention.

FIG. 3 is a schematic configuration diagram of a strip material winding device shown as a modified example of the present invention.

FIG. 4 is a schematic configuration diagram showing an example of a conventional belt-shaped material winding device.

[Explanation of symbols]

 1 band-shaped material 2 supply shaft 8 winding shaft 9 separator 10 dancer roller 10a lever 10b roller 17 buffer unit 19 position detector 21 stopper

Claims (10)

[Claims] 1. A belt-shaped material wound around a winding shaft is brought into contact with a dancer roller at a position on the front side of the winding shaft to apply a tension to the belt-shaped material between the dancer roller and the winding shaft. In a belt-shaped material winding device that winds material while controlling the tension of the material to a constant value, the belt-shaped material is supplied to the dancer roller side upstream of the dancer roller according to the state in which the winding shaft winds the belt-shaped material. A strip material winding device, characterized in that means for controlling the amount is provided. 2. The band-shaped material winding device according to claim 1, wherein a plurality of band-shaped materials are piled up on the winding shaft so as to be wound at the same time. 3. The plurality of strip-shaped materials, two of which are electrodes of a lithium ion battery, and two of which are separators which are interposed between the electrodes and are wound in layers.
The strip-shaped material winding device described in 1. 4. A belt-shaped material wound around a supply shaft is wound around a winding shaft, and a dancer roller is brought into contact with the belt-shaped material at a position midway to apply tension to the dancer roller and the winding shaft. In the belt-shaped material winding device for controlling the tension of the belt-shaped material between and constant, in the upstream side of the dancer roller, the belt-shaped material pulled out from the supply shaft is temporarily stored, and the winding shaft side is A belt-shaped material winding device comprising a buffer unit for controlling the amount of the belt-shaped material supplied to the winding side according to the state of winding the belt-shaped material. 5. The strip-shaped material according to claim 4, further comprising a stopper provided between the buffer unit and the supply shaft for temporarily stopping the supply of the strip-shaped material to the buffer unit side. Take-up device. 6. The buffer unit supplies the strip-shaped material to the winding shaft side in accordance with a deviation between an amount of the strip-shaped material delivered to the buffer unit side and an amount of the winding shaft winding up the strip-shaped material. The strip material winding device according to claim 4, further comprising means for controlling the amount of the strip material to be wound. 7. A belt-shaped material wound around a supply shaft is wound onto a winding shaft, and a dancer roller is brought into contact with the belt-shaped material at a midway position thereof to apply tension to the dancer roller and the winding shaft. In the belt-shaped material winding device that controls the tension of the belt-shaped material between and, the dancer roller has a roller at the tip to operate like a pendulum, and the pendulum operation causes the roller to adhere to the belt-shaped material. The lever is configured to abut, the means for outputting a signal corresponding to the position of the roller, and the belt-like material pulled out from the supply shaft is temporarily stored on the upstream side of the dancer roller, and the winding is performed. A strip-shaped material winding device comprising a buffer unit for controlling the amount of the strip-shaped material supplied to the winding side according to a state in which the winding shaft side winds the strip-shaped material. 8. The band-shaped material winding device according to claim 7, wherein the winding unit controls the buffer unit based on speed information for winding the band-shaped material and position information of the roller. 9. A belt-shaped material wound around a supply shaft is wound around a winding shaft, and a dancer roller is brought into contact with the belt-shaped material at a midway position thereof to give tension to the dancer roller and the winding shaft. In the belt-shaped material winding device that controls the tension of the belt-shaped material between and, the dancer roller has a roller at the tip to operate like a pendulum, and the pendulum operation causes the roller to adhere to the belt-shaped material. The lever is configured to abut, the means for outputting a signal corresponding to the position of the roller, and the belt-like material pulled out from the supply shaft is temporarily stored on the upstream side of the dancer roller, and the winding is performed. A buffer unit for controlling the amount of the strip-shaped material supplied to the winding side in accordance with the state in which the strip-shaped material is wound on the take-up shaft side; The amount of the strip-shaped material supplied from the buffer unit to the winding shaft side is controlled according to the information on the amount to be fed to the side, the information on the amount by which the winding shaft winds the strip-shaped material, and the position information on the roller. A strip-shaped material winding device comprising: 10. A belt-shaped material wound around a supply shaft is wound onto a winding shaft, and a dancer roller is brought into contact with the belt-shaped material at a midway position thereof to apply tension to the dancer roller and the winding shaft. In the belt-shaped material winding device that controls the tension of the belt-shaped material between and, the dancer roller has a roller at the tip to operate like a pendulum, and the pendulum operation causes the roller to adhere to the belt-shaped material. A means for outputting a signal corresponding to the position of the roller, a supply shaft drive motor for rotating the supply shaft in the feeding direction, and a winding shaft for the strip-shaped member. And a means for controlling the speed of the supply shaft driving motor in accordance with the winding information and the position information of the roller.