JP2011042436A - Web carrying device and web carrying method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a web carrying device and a web carrying method improving manufacturing efficiency, and reducing a yield. <P>SOLUTION: This web carrying device has a head unit 25 for skipping a joint generated when replacing a roll only in a predetermined process, by carrying foil 90 by using a plurality of pairs of nip rollers N1, and has a dummy roller 24a for changing a carrying passage of the foil 90 by interlocking with the head unit 25, and reduces a tension reduction quantity in the foil 90 by restraining a spiral change in the foil 90 by the dummy roller 24a when operating the head unit 25. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique relating to thin film conveyance, and specifically relates to a technique relating to control of the tension of a thin film (web) in a conveyance apparatus and a conveyance method, and a technique relating to the replacement of a thin film.

In recent years, there have been an increasing number of cases where motors are used to drive automobiles such as hybrid cars and electric cars. And in order to obtain the output of the drive motor mounted in a motor vehicle, a small and high output secondary battery is required.
A metal thin film is used as an electrode for a secondary battery mounted on a vehicle, and a technique relating to thin film conveyance is used for manufacturing a thin film electrode.
And about the technique regarding thin film conveyance, various techniques are disclosed.

Patent Document 1 discloses a technique relating to a method for manufacturing a sheet electrode for an electric double layer capacitor and a roll rolling apparatus.
This is a technique for conveying a roll-like long web so as to pass through predetermined steps such as coating, rolling, and drying. By transporting the web with a constant tension and controlling the displacement in the width direction by the edge position controller, the edge is bent and part of it overlaps, and the edge is not cracked. It can be rolled and conveyed.

JP 2004-186193 A

However, Patent Document 1 is considered to have the following problems.
In the process of manufacturing an electrode body of a secondary battery, it is obvious that improvement in manufacturing quality is important, but improvement in manufacturing efficiency and reduction in yield are also emphasized. However, Patent Document 1 has no such description or suggestion.
In particular, improvement in maintainability at the time of roll replacement or web breakage is emphasized when manufacturing an electrode body of a secondary battery.

  Accordingly, an object of the present invention is to provide a web transport apparatus and a web transport method capable of realizing an improvement in manufacturing efficiency and a reduction in yield in order to solve such problems.

In order to achieve the above object, the web conveying device according to the present invention has the following characteristics.
(1) In a web conveyance device including a retraction structure that conveys a web using a plurality of pairs of roller driving mechanisms and skips only a predetermined step of a seam generated when the roll is replaced,
It has a tension holding mechanism that changes the web conveyance path in conjunction with the retraction structure, and when the retraction structure is operated, the tension reduction mechanism reduces the amount of tension reduction of the web. .

(2) In the web conveyance device according to (1),
A dancer roller that absorbs fluctuations in tension generated during conveyance of the web, a drive device that drives the dancer roller, a drive shaft that is connected to the drive device, and a hollow pipe that is disposed on the outer periphery of the drive shaft; A pair of arms that rotatably support both ends of the dancer roller and connected to the hollow pipe, and the drive shaft and the hollow pipe correspond to a central portion of the dancer roller using a locking pin It is fixed at a position where

(3) In the web conveyance device according to (2),
The plurality of pairs of roller driving mechanisms that convey the web include a driving roller and a pressure roller, and the pressure roller is similar to the dancer roller, the driving device, the drive shaft, and the The driving device used for the pressure roller is disposed on the same side as the driving device used for the dancer roller, and includes a hollow pipe, the arm, and the locking pin.

(4) In the web conveyance device according to (3),
Of the pair of roller drive mechanisms that have a coating mechanism that coats the web and is disposed after the coating mechanism in the web conveyance direction, the pressure roller is tapered. It is characterized by that.

Moreover, in order to achieve the said objective, the web conveyance method by this invention has the following characteristics.
(5) In the web conveyance method of conveying with a pair of roller drive mechanisms provided with a plurality of webs,
The tension region of the web is divided into a plurality of portions by the pair of roller driving mechanisms, and the tension of the first tension region close to the reference roller is set as a reference roller having one point as a reference point in the pair of roller driving mechanisms. The pair of roller driving mechanisms are driven so as to have a predetermined value, the pair of roller driving mechanisms are driven so that the tension in the second tension region adjacent to the first tension region becomes a predetermined value, and the web It is characterized by applying tension.

The following operations and effects can be obtained by the web conveyance device according to the present invention having such characteristics.
The configuration of the invention described in the above (1) is that the web is transported using a plurality of pairs of roller drive mechanisms, and the web transport device includes a retracting structure that skips only a predetermined process of a seam generated when the roll is replaced. A tension holding mechanism that changes the web conveyance path in conjunction with the structure is provided. When the retracting structure is operated, the tension holding mechanism reduces the amount of decrease in web tension.

Since the web transport device has a tension holding mechanism and changes the web transport path in conjunction with the retracting structure, the tension of the web can be retained by the tension retaining mechanism when the retracting mechanism is operated.
For example, by using a dummy roller or the like to press the web in conjunction with the retracting mechanism, it is possible to suppress changes in the web pass line. Since the tension is maintained and the change of the pass line is suppressed, it is possible to suppress the slack of the web even when the retracting mechanism is activated. The retracting structure is a mechanism necessary for the web transport mechanism, for example, retracting the web so that the gravure roll portion and the portion where the web is connected do not contact each other.

If the web is slackened due to the working of the retracting mechanism, it is necessary to re-tension. This work consumes time and requires web tension because it needs to be tensioned with a tension controller or the like provided in a later process.
However, by having a tension holding mechanism, it is possible to suppress changes in the pass line and improve manufacturing efficiency. Moreover, since the consumption of the web can be suppressed, the yield can be reduced.

  Further, the configuration of the invention described in the above (2) includes a dancer roller that absorbs a variation in tension that occurs during web conveyance, a drive device that drives the dancer roller, a drive shaft that is connected to the drive device, and a drive shaft. A hollow pipe disposed on the outer periphery of the dancer, and a pair of arms that rotatably support both ends of the dancer roller and connected to the hollow pipe. It is fixed at a position corresponding to the central portion of the.

The drive device for the dancer roller is driven from one side, and the hollow pipe and the drive shaft are coupled at the center of the dancer roller with a locking pin, so the power transmitted from the drive device to the drive shaft is the dancer in the hollow pipe. It is transmitted to a position corresponding to the central portion of the roller. Since it has such a structure, the inclination of the dancer roller can be suppressed by transmitting power.
Since the tilt of the dancer roller causes the web to meander, the drive mechanism for the dancer roller is usually provided at both ends of the dancer roller. However, when the drive mechanisms are provided on both sides, the maintainability is deteriorated and problems such as dust prevention also occur.
For this reason, by providing the drive mechanism only on one side and suppressing the tilt of the dancer roller, it is possible to contribute to cost reduction and improve maintainability.

  Further, in the configuration of the invention described in (3) above, in the web conveyance device described in (2), the plurality of pairs of roller driving mechanisms that convey the web include a driving roller and a pressure roller. Similar to the dancer roller, the pressure roller includes a drive device, a drive shaft, a hollow pipe, an arm, and a locking pin. On the same side as the drive device used for the dancer roller, the drive device used for the pressure roller is provided. Is to be placed.

As with the dancer roller, the pressure roller of the roller drive mechanism uses a structure in which the drive shaft is connected by a locking pin at the center of the hollow pipe to prevent tilting of the pressure roller due to thrust from the drive unit. Is possible. As a result, the meandering of the web can be prevented.
Also, the drive device can be cantilevered like the dancer roller, and arranged in the same direction as the dancer roller drive device, it is possible to improve the maintainability of the device.

The invention described in (4) above has a coating mechanism for coating the web in the web transport device described in (3), and is disposed after the coating mechanism in the web transport direction. Of the pair of roller driving mechanisms, the pressure roller is tapered.
By forming the pressure roller into a taper shape, it is possible to suppress wrinkles generated on the web and remove the generated wrinkles when forming a plurality of coated portions on the web.
This is because when the pressure roller having a tapered shape is pressed against the driving roller and the web is conveyed, the pressure roller has a tapered shape, so that a force is exerted on the web in the width direction. is there.

Moreover, the following operations and effects can be obtained by the web conveying method according to the present invention having such characteristics.
According to the configuration of the invention described in (5) above, in the web transport method of transporting by a pair of rollers provided with a plurality of webs, the tension region of the web is divided into a plurality of by a pair of roller drive mechanisms, and As a reference roller having one point as a reference point, a pair of roller driving mechanisms are driven so that the tension in the first tension region close to the reference roller becomes a predetermined value, and the second tension adjacent to the first tension region. The pair of roller driving mechanisms are driven so that the tension of the region becomes a predetermined value, and the tension of the web is applied.

By dividing the tension region into a plurality of portions and performing the stall tension in order from the first tension region close to the reference roller, the web conveying device can be smoothly tensioned.
In using the web conveyance device, the web needs to be replaced due to various factors such as cutting of the web and occurrence of defects. At this time, it is possible to tension the web without loss by tensioning the web in the above procedure.

It is the schematic of the conveyance line of this embodiment. It is a side view of the 1st coater of this embodiment. It is an enlarged view of A part of FIG. 2 of this embodiment. FIG. 3 is an enlarged view of a retracted state of a portion A in FIG. 2 according to the present embodiment. It is a front view of the dancer mechanism of this embodiment. FIG. 6 is a partially enlarged side view of FIG. 5 of the present embodiment. It is a pneumatic circuit figure which controls a dancer roller of this embodiment. It is a front view of a PET film cassette unit of this embodiment. It is a side view of a PET film cassette unit of this embodiment. It is a perspective view of a PET film cassette unit of this embodiment. It is a perspective view of a nip roller of this embodiment. It is front sectional drawing of the nip roller mechanism of this embodiment. It is a flow at the time of stall tension of a conveyance line of this embodiment. It is a flow of a subroutine of unwinding part stall tension of this embodiment. It is a flow of a subroutine of B side coating part stall tension of this embodiment. It is a flow of an inspection process stall tension subroutine of the present embodiment. It is a flow of a subroutine of the winding unit stall tension of this embodiment.

First, an embodiment of the present invention will be described.
FIG. 1 is a schematic diagram of a conveyance line according to this embodiment.
The transport line 100 is a production line including an unwinding device 10, a first coater 20, a first drying furnace 30, a second coater 40, a second drying furnace 50, an inspection process 60, a winding accumulator 70, and a winding device 80. It is. Below, the outline of the conveyance line 100 is demonstrated easily.
The unwinding device 10 is a device for unwinding the foil 90. The foil 90 is a foil material using copper, aluminum or the like, and is set in the unwinding device 10 by being connected to an unwinding roll 11 prepared as an unwinding mechanism in a state of being wound around a bobbin. Sent.

The unwinding device 10 is provided with an unwinding dancer 12 to control the tension of the foil 90. Further, the unwinding accumulator 15 disposed in the subsequent process of the unwinding apparatus 10 is also provided with an unwinding / conveying nip roller 16 and an accumulator dancer 17 to control the tension.
Although not shown in the drawing, the unwinding accumulator 15 is provided with a mechanism for stocking the foil 90 so as not to cause material shortage when the bobbin of the unwinding device 10 is replaced.

The first coater 20 is an apparatus that performs gravure coating of an active material on one surface of the foil 90. In the present embodiment, the first coater 20 performs three-line coating on the foil 90.
The first drying furnace 30 is a furnace for drying the active material coated on the foil 90 by the first coater 20.
The second coater 40 is a device that gravure-coats the active material on the other surface of the foil 90. In this embodiment, the second coater 40 is applied to the foil 90 in the same manner as the first coater 20.
The second drying furnace 50 is a furnace that dries the active material coated on the foil 90 by the second coater 40.

The inspection process 60 is a process for inspecting the state of the active material coated on the foil 90. The winding accumulator 70 is a device that buffers the foil 90 so that the active material can be continuously applied to the foil 90 even when the bobbin is replaced.
The winding device 80 is a device that winds the dried foil 90 around a bobbin, and is arranged for the purpose of winding the foil 90 coated on the transport line 100.

FIG. 2 shows a side view of the first coater.
FIG. 3 shows an enlarged view of a portion A in FIG. FIG. 4 shows an enlarged view of the retracted state of the portion A in FIG.
The first coater 20 includes a gravure coating unit 21, a nip roller 22, a cylinder 23, and a dummy roller 24a.
The gravure coating unit 21 includes a gravure roll 21a and a doctor blade 21b, and applies an active material to the foil 90 with the gravure roll 21a.
The nip roller 22 is provided to control the tension of the foil 90, and also has a function of dividing the tension.

The cylinder 23 is a mechanism for generating a driving force for retracting the head unit 25. By operating the cylinder 23, the head unit 25 is centered on the rotating shaft 24c as shown in FIGS. It is possible to rotate.
The head unit 25 is provided with a roller 24d and is arranged at a position where the foil 90 can be pressed against the gravure roll 21a.
The dummy roller 24a is supported by the arm 24b and is provided in the head unit 25. The dummy roller 24 a functions to hold down the foil 90, and the path of the foil 90 can be changed when the head unit 25 is retracted by the cylinder 23.

FIG. 5 shows a front view of the dancer mechanism. FIG. 6 is a partially enlarged side view of FIG.
The second coater 40 is provided with dancer mechanisms D1 at two locations. B side coating first dancer 41 and B side coating second dancer 44. The B-side coating first dancer 41 and the B-side coating second dancer 44 are provided for the purpose of controlling the tension of the foil 90.
The pneumatic cylinder D2 is a drive source for operating the swing arm D3, and the swing arm D3 is fixed to the solid shaft D4. The solid shaft D4 is fixed by a hollow shaft D5 and a locking pin D6. The hollow shaft D5 is rotatably held by a housing by a bearing D7.

A holding arm D8 is fixed to the hollow shaft D5, and the holding arm D8 holds the dancer roller D9 so as to be rotatable. The dancer roller D9 is arranged in direct contact with the foil 90.
Accordingly, the dancer roller D9 moves like a pendulum as shown in FIG. 7 by the operation of the pneumatic cylinder D2, and controls the tension of the foil 90. The operating range of the swing arm D3 is determined by the stopper D3a. Further, the inclination of the solid shaft D4 is detected by a rotary encoder (not shown) and fed back to the operation control of the pneumatic cylinder D2, thereby controlling the movement of the swing arm D3.

FIG. 7 shows a pneumatic circuit diagram for controlling the dancer roller.
The pneumatic cylinder D2 for operating the dancer mechanism D1 is controlled by an electromagnetic valve A1 connected to a control panel (not shown). Air is supplied from the air source A6 to the P port of the electromagnetic valve A1.
The electropneumatic regulator A3 is connected to the A port of the electromagnetic valve A1, and the check valve A4 is connected to the electropneumatic regulator A3 and connected to the pneumatic cylinder D2.
A residual pressure valve A5 is connected to the R1 and R2 ports of the electromagnetic valve A1, and the residual pressure valve A5 is connected to the pneumatic cylinder D2. A silencer A2 is connected to each of the electropneumatic regulator A3 and the residual pressure valve A5.

FIG. 8 shows a front view of the PET film cassette unit. FIG. 9 shows a side view of the PET film cassette unit.
The PET film cassette unit P1 includes a shaft P2, a free roller P3 that holds the shaft P2, and a base P4. The PET film cassette unit P1 can be installed by setting the base P4 at a predetermined location on the transport line 100. It has become.
The free roller P3 is provided at two places on both sides, for a total of four places, and is installed at a position where the core of the shaft P2 comes out.
A PET film P5 is wound around the shaft P2, and the PET film cassette unit P1 is detachably held on the transport line 100 in order to supply both of the necessary PET films P5.

FIG. 10 shows a perspective view of the PET film cassette unit.
The PET film cassette unit P <b> 1 is disposed in a necessary part of the transport line 100, for example, the second coater 40 positioned between the first drying furnace 30 and the second drying furnace 50 or the inspection process 60. FIG. 10 is a part of the second coater 40.
The PET film cassette unit P1 is attached to a holding base P7 provided in equipment on the transport line 100 side. The holding base P7 is in contact with the base P4, and the PET film cassette unit P1 is positioned by positioning pins P8 provided on the holding base P7. The slide guide P9 shown in FIG. 9 is provided with a taper on the inlet side so that the base P4 can be easily taken in and out.

Then, the PET film cassette unit P1 can be removed by sliding together with the base P4 as shown in FIG. 10, and the position of the base P4 is determined by the positioning mechanism P6. The foil 90 can be held at the transfer position.
The PET film P5 is used as a connecting material by connecting the foil 90 and the PET film P5 when the foil 90 is cut or when the foil 90 is replaced. The PET film P5 is thicker than the foil 90 and can be bonded to the foil 90.

FIG. 11 is a perspective view of the nip roller.
FIG. 12 is a front sectional view of the nip roller mechanism.
The nip roller N1 is a roller having a drum-like shape with its center swelled. Specifically, the outer periphery of the center portion of the nip roller N1 is the apex, and the shape is extended in both sides in a substantially conical shape.
The nip roller N1 is paired with the drive roller N2, and is arranged so that the nip roller N1 presses the drive roller N2.

The pressure mechanism of the nip roller N1 is provided with a mechanism equivalent to the dancer mechanism D1, although not shown. Accordingly, the pressure driving device for the driving roller N2 of the nip roller N1 is also provided with a mechanism equivalent to the solid shaft D4 and the hollow shaft D5 shown in FIGS. 5 to 7 in the nip roller N1 and equivalent to the locking pin D6. It is locked by the member. And it is the structure which transmits motive power from a solid shaft to a hollow shaft. Further, regarding the power used for the pressurizing mechanism, the one-side drive structure is the same as that of the pneumatic cylinder D2 of the dancer mechanism D1, and the pressurizing mechanism is arranged in the same direction as the dancer mechanism D1.
Further, a PTFE tube N1a is provided on the outer periphery of the nip roller N1.
As shown in FIG. 1, the nip roller N1 and the driving roller N2 are arranged at various locations on the conveyance line 100, such as the unwinding conveyance nip roller 16, the B-side coating conveyance nip roller 42, and the like.

Since this embodiment is the structure demonstrated above, there exists an effect | action and effect which are demonstrated below.
First, by adopting the configuration of this embodiment, it is possible to prevent loss when the foil 90 is replaced.
3 and 4 described above, the cylinder 23 can be operated to retract the head unit 25.
At this time, since the head unit 25 is provided with the dummy roller 24a, the foil 90 is pressed against the dummy roller 24a and moves in conjunction with the operation of the head unit 25. That is, the transport path of the foil 90 can be changed by interlocking the head unit 25 and the dummy roller 24a.

As a result, the foil 90 is pressed against the dummy roller 24a when the head unit 25 is in the retracted state, and the pass line changes.
When the joint portion of the foil 90 interferes with the gravure roll 21a, a problem such as scattering of the coating material occurs. Therefore, it is desirable that the head unit 25 is retracted so that the foil 90 does not contact the gravure roll 21a.

By setting the head unit 25 in the retracted state, the length of the pass line of the foil 90 is substantially the same in the state of FIG. 3 and the state of FIG.
The change in the pass line length causes sagging and tension of the foil 90. The replacement of the foil 90 is performed when the foil 90 is cut. However, an overlapping portion of the foil 90 is generated at the joint portion of the foil 90, and when the foil 90 is slack, there is a possibility of interference in the first drying furnace 30 or the second drying furnace 50.

In order to prevent this, it is necessary to adjust the tension of the foil 90 by the accumulator dancer 17, the B-side coating first dancer 41, etc., but it takes time to adjust the tension by the tension holding mechanism. For this reason, the foil 90 is wasted. Therefore, waste of the foil 90 can be eliminated by suppressing the change in the pass line length.
The change in the pass line can be suppressed, and the production efficiency can be improved. Moreover, since the consumption of the web can be suppressed, the yield can be reduced.

Further, by adopting the configuration of the present embodiment, it is possible to maintain the tension of the foil 90 when the equipment is stopped.
As shown in FIG. 7 described above, by preparing the residual pressure valve A5 and the check valve A4 in the pneumatic circuit for operating the pneumatic cylinder D2 of the dancer mechanism D1, the air when the equipment of the transfer line 100 is stopped is prepared. Even when the air supply from the source A6 is interrupted, the residual pressure of the silencer A2 can be maintained.
For this reason, it is possible to maintain the tension of the foil 90 even when the equipment of the transport line 100 stops in an emergency.

  If the foil 90 sags when the equipment is stopped, there is a possibility that the tension of the foil 90 needs to be re-stretched, and that the slack of the foil 90 may occur due to the looseness of the tension. . For this reason, the residual pressure is maintained by providing the check valve A4, the residual pressure valve A5, and the like, and the tension of the foil 90 is maintained, so that the displacement of the foil 90 and the loosening of the tension can be prevented.

Further, by adopting the configuration of the present embodiment, the joining of the foil 90 is facilitated by the PET film cassette unit P1 when the foil 90 is cut.
The PET film cassette unit P1 includes a PET film P5 used for connection when the foil 90 is cut. The foils 90 cut with the PET film P5 are joined together, and the foil 90 is re-stretched. For this reason, it is desirable that the PET film cassette unit P1 can be arranged so that there is no deviation with respect to the center of the feeding of the foil 90 of the transport line 100.
Replacing can be facilitated by constructing the PET film cassette unit P1 as a unit on the base P4 and having the positioning base P7 positioned by the positioning pins P8. Further, since the PET film cassette unit P1 is placed on the base P4, the unit can be prepared outside the transport line 100.

Moreover, the center of PET film P5 can be taken out easily by taking the structure which puts the shaft P2 on the free roller P3.
Moreover, by taking this embodiment, the tension | tensile_strength division of the conveyance line 100 can be divided | segmented and the tension | tensile_strength of the foil 90 can be read again quickly.

FIG. 13 shows a flow at the time of stall tension of the transfer line. FIG. 14 shows a flow of a subroutine for unwinding section stall tension. FIG. 15 shows a flow of a subroutine of the B side coating portion stall tension. FIG. 16 shows a flow of an inspection process stall tension subroutine. FIG. 17 shows a flow of a winding part stall tension subroutine.
The foil 90 stretched on the transport line 100 may need to be restretched because it has been cut once or a defect has occurred. FIG. 13 shows a flow of the procedure. After passing the foil 90 through the transport line 100, tension is applied to the foil 90 in the following procedure.

The main flow is as shown in FIG.
In S1, an unwinding section stall tension subroutine is executed.
In S2, a B surface coating part stall tension subroutine is executed. Then, the process proceeds to S3. In the flowchart, the processes of S1 and S2 are performed in parallel for the sake of convenience, but actually, the stall tension may be performed separately with the nip roller 22 as a reference.
In S3, an inspection process stall tension subroutine is executed. Then, the process proceeds to S4.
In S4, a winding part stall tension subroutine is executed. Then, the stall tension routine ends.

Next, a subroutine for the unwinding section stall tension will be described. FIG. 14 shows the flow.
In S11, the unwinding conveyance nip roller 16 is reversed. The unwinding / conveying nip roller 16 rotates the unwinding / conveying nip roller 16 in a direction in which the foil 90 is fed to the lower process when the foil 90 is conveyed. However, in order to apply tension to the foil 90, the unwinding / conveying nip roller 16 is rotated in the reverse direction. Further, the unwinding roll 11 is reversed in the same manner. Then, the process proceeds to S12.
In S12, it is confirmed whether the unwinding accumulator 17 is in the vertical position. If it is in the vertical position (S12: Yes), the process proceeds to S13. If the accumulation dancer 17 is not in the vertical position (S12: No), the process proceeds to S12.

In step S13, the unwinding / conveying nip roller 16 is stopped.
In S14, it is confirmed whether the unwinding dancer 12 is in the vertical position. If it is in the vertical position (S14: Yes), the process proceeds to S15. If the unwinding dancer 12 is not in the vertical position (S14: No), the process proceeds to S14.
In S15, the unwinding roll 11 is stopped. Then, the process proceeds to S16.
In S16, the completion of the unwinding section stall tension is stored in a control section (not shown).
The stall tension on the upper process side from the nip roller 22 is completed by the flow up to this point.

The rotation speed of the unwinding roll 11 is controlled not to be higher than the rotation speed of the unwinding / conveying nip roller 16. This is to prevent the unwinding roll 11 from stopping earlier than the unwinding / conveying nip roller 16, but reverse rotation of the unwinding roll 11 in S11 is performed between S13 and S14. Anyway.
That is, since the nip roller 22 is used as a reference, the stall tension on the side close to the nip roller 22 may be controlled first.

Next, the B surface coating part stall tension subroutine will be described. FIG. 15 shows the flow.
In S21, the B-side coating / conveying nip roller 42 is rotated forward. By rotating the B-side coating / conveying nip roller 42 in the forward direction, tension can be applied to the foil 90 in the conveying direction of the foil 90. Further, the B-side backup roller 45 is rotated forward. Similarly, tension can be applied to the foil 90. Then, the process proceeds to S22.
In S22, it is confirmed whether or not the B-side coating first dancer 41 is in the vertical position. If the B-side coating first dancer 41 is in the vertical position (S22: Yes), the process proceeds to S23. If the B-side coating first dancer 41 is not in the vertical position (S22: No), the process proceeds to S22.
In S23, the rotation of the B-side coating / conveying nip roller 42 is stopped. Then, the process proceeds to S24.

In S24, it is confirmed whether or not the B-side coating second dancer 44 is in the vertical position. If the B-side coating second dancer 44 is in the vertical position (S24: Yes), the process proceeds to S25. If the B-side coating second dancer 44 is not in the vertical position (S24: No), the process proceeds to S24.
In S25, the rotation of the B-side backup roller 45 is stopped. Then, the process proceeds to S26.
In S26, the B side coating unit stall tension completion is stored by a control unit (not shown). Then, the B surface coating part stall tension subroutine is terminated.

Next, the inspection process stall tension subroutine will be described. FIG. 16 shows the flow.
In S31, the inspection conveyance nip roller 62 is rotated forward. Then, the process proceeds to S32.
In S32, it is confirmed whether or not the inspection transport dancer 61 is in the vertical position. If the inspection transport dancer 61 is in the vertical position (S32: Yes), the process proceeds to S33. If the inspection conveyance dancer 61 is not in the vertical position (S32: No), the process proceeds to S32.
In S33, the inspection conveyance nip roller 62 is stopped. Then, the process proceeds to S34.
In S34, the completion of the inspection process stall tension is recorded. Then, the inspection process stall tension subroutine is completed.

Next, a subroutine for take-up stall tension will be described. FIG. 17 shows the flow.
In S41, the take-up conveyance nip roller 72 is rotated forward. Further, the winding mechanism 82 is rotated forward. Then, the process proceeds to S42.
In S42, it is confirmed whether the winding accumulator 71 is in the vertical position. If the winding accumulator 71 is in the vertical position (S42: Yes), the process proceeds to S43. If the winding accumulator 71 is not in the vertical position (S42: No), the process proceeds to S42.
In S43, the rotation of the winding / conveying nip roller 72 is stopped. Then, the process proceeds to S44.

In S44, it is confirmed whether the winding dancer 81 is in the vertical position. If the winding dancer 81 is in the vertical position (S44: Yes), the process proceeds to S45. If the winding dancer 81 is not in the vertical position (S44: No), the process proceeds to S44.
In S45, the winding mechanism 82 is stopped. Then, the process proceeds to S46.
In S46, the completion of the winding stall tension is stored. Then, the winding stall tension subroutine ends.
Thus, the tension of the foil 90 can be quickly applied by dividing the tension section and performing the stall tension from the location near the nip roller 22 in order from the nip roller 22 as a base point.

Moreover, since this embodiment employs the above-described configuration, the number of actuators of the dancer mechanism D1 can be reduced, which can contribute to cost reduction.
In the configuration of the dancer mechanism D1, the dancer roller D9 can be controlled with a single pneumatic cylinder D2.
Usually, in order to control the dancer roller D9, it is necessary to operate the holding arm D8 that holds the dancer roller D9 without deviation. However, since the length of the dancer roller D9 is about several hundred mm, when the actuator is moved in a cantilever manner, twisting occurs and the foil 90 is meandered.

However, the hollow shaft D5 and the solid shaft D4 are fastened using the locking pin D6 at the center of the foil 90 in the width direction. Accordingly, the distance from the locking pin D6 to the two holding arms D8 is uniform, and the force is transmitted evenly. For this reason, since twisting occurs evenly, it becomes difficult to cause the foil 90 to meander.
Therefore, the pneumatic cylinder D2 can be driven by one with respect to the dancer mechanism D1, which can contribute to cost reduction. Since a plurality of dancer mechanisms D1 are used in the transport line 100, it can be said that it is effective for cost reduction.

Further, since the pneumatic cylinder D2 can be disposed outside the transfer line 100, it is possible to improve workability.
This technique is used not only for the dancer mechanism D1, but also for the driving mechanism of the nip roller N1. Also for the nip roller N1, it is desirable that the thrust for pressing the nip roller N1 toward the driving roller N2 is applied evenly, that is, the axes of the nip roller N1 and the driving roller N2 are always parallel.
Therefore, the meandering of the foil 90 can be prevented by using the same structure as the dancer mechanism D1 with respect to the axis of the nip roller N1.
Further, the fact that the dancer mechanism D1 and the driving mechanism of the nip roller N1 are arranged on the same side can improve the maintainability.

In addition, since the present embodiment adopts the above-described configuration, it is possible to suppress the generation of wrinkles of the foil 90 and to remove the wrinkles of the foil 90 when the foil 90 is conveyed.
Since the nip roller N1 is tapered, the foil 90 is stretched in the width direction of the foil 90 when a load is applied to the nip roller N1 downward as shown in FIG. Further, since the heat-shrinkable PTFE tube N1a is covered, the contact resistance with respect to the foil 90 is reduced.
Thus, if the foil 90 is wrinkled by applying force from the center to the outer side in the width direction of the foil 90, the effect of extending the wrinkle can be obtained. Moreover, even if wrinkles are not formed, the generation of wrinkles can be suppressed.

Although the invention has been described according to the present embodiment, the invention is not limited to the embodiment, and by appropriately changing a part of the configuration without departing from the spirit of the invention. It can also be implemented.
For example, it is not hindered to change the material shown in the present embodiment. Moreover, it does not prevent changing the configuration within the scope of the design matters.

DESCRIPTION OF SYMBOLS 10 Unwinding device 11 Unwinding roll 12 Unwinding dancer 15 Unwinding accumulator 16 Unwinding conveyance nip roller 17 Accumulating dancer 20 First coater 21 Gravure coating part 21a Gravure roll 21b Doctor blade 22 Nip roller 23 Cylinder 24a Dummy roller 24b Arm 24c Rotation Shaft 24d Roller 25 Head unit 30 First drying furnace 40 Second coater 41 B-side coating first dancer 42 B-side coating conveying nip roller 44 B-side coating second dancer 45 B-side backup roller 50 Second drying furnace 60 Inspection Step 61 Inspection and transport dancer 62 Inspection and transport nip roller 70 Winding accumulator 71 Winding accumulator dancer 72 Winding and transporting nip roller 80 Winding device 81 Winding dancer 82 Winding mechanism 90 Foil 100 Transport line

Claims (5)

In a web conveyance device having a retraction structure that conveys a web using a plurality of pairs of roller driving mechanisms and skips only a predetermined step of a seam that occurs when replacing a roll,
In conjunction with the retracting structure, it has a tension holding mechanism that changes the conveyance path of the web,
When the retracting structure is operated, the web holding device reduces the amount of tension reduction of the web by the tension holding mechanism. In the web conveyance apparatus of Claim 1,
A dancer roller that absorbs fluctuations in tension generated during conveyance of the web;
A driving device for driving the dancer roller;
A drive shaft connected to the drive device;
A hollow pipe disposed on the outer periphery of the drive shaft;
A pair of arms rotatably supporting both ends of the dancer roller and connected to the hollow pipe;
With
The web conveying device, wherein the drive shaft and the hollow pipe are fixed at a position corresponding to a central portion of the dancer roller using a locking pin. In the web conveyance apparatus of Claim 2,
The plurality of pairs of roller driving mechanisms that convey the web have a driving roller and a pressure roller,
The pressure roller, like the dancer roller, includes the drive device, the drive shaft, the hollow pipe, the arm, and the locking pin.
The web conveying device, wherein the driving device used for the pressure roller is arranged on the same side as the driving device used for the dancer roller. In the web conveyance apparatus of Claim 3,
Having a coating mechanism for coating the web;
Of the pair of the roller driving mechanisms disposed after the coating mechanism with respect to the web conveying direction, the pressure roller has a tapered shape. In a web conveying method of conveying with a pair of roller driving mechanisms provided with a plurality of webs,
Dividing the tension area of the web into a plurality by the pair of roller driving mechanisms,
Driving the pair of roller drive mechanisms as a reference roller having one point as a reference point of the pair of roller drive mechanisms so that the tension in the first tension region near the reference roller becomes a predetermined value;
A web conveying method, wherein the pair of roller driving mechanisms are driven so that the tension of a second tension region adjacent to the first tension region becomes a predetermined value, and the tension of the web is applied.

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