JP5176645B2 - Web conveying apparatus and conveying method thereof - Google Patents

Description

  The present invention relates to an apparatus for conveying roll-to-roll paper, plastic, cloth, metal foil, and a sheet or film (hereinafter referred to as a web) composed of a laminate thereof. In particular, the present invention relates to a web conveyance device that performs high-precision and high-speed conveyance, a web conveyance device that can apply a uniform contact pressure in the web width direction, and a web conveyance device that can apply a uniform tension in the web width direction. Furthermore, the present invention relates to a web transport method using these web transport devices.

  In an industrial method for processing and manufacturing a web in a roll-to-roll manner, various types of processing are conventionally performed. In particular, nip rolls have been used for transporting, holding or laminating webs.

  When handling these nip rolls, if rolls with relatively small diameter and low rigidity are pressed at both ends of the shaft, a problem arises that the rolls bend. At this time, as shown in FIG. 6, a gap is generated in the central portion in the longitudinal direction of the roll, which causes a problem that the nip force of the web is reduced. Increasing the pressure to increase the nip force will further increase the gap. As a result, the contact width of the roll is narrowed, the web tension is biased to both ends, and serious problems such as web meandering and wrinkling occur. In particular, in the case of a wide roll, the problem due to the gap was more remarkable.

  As a means for avoiding this problem, conventionally, a method of applying a uniform contact pressure in the web width direction when a roll-to-roll web is conveyed is known (for example, see Patent Document 1). This method uses a roll with a structure in which a weight is incorporated inside the roll in the central part of the cylindrical member in the nip roll, increases the roll rigidity, improves the deflection of the central part in the axial direction, and obtains a uniform nip. It is.

  However, in this method, the roll shape cannot be determined unless the force applied to the roll is known in advance, and it is difficult to calculate the weight amount. In addition, there is a structural limit to improving the rigidity by the weight incorporated in the roll, and it cannot be increased beyond a certain level. Therefore, it was impossible to obtain a uniform nip in the width direction of the web, and it was impossible to completely eliminate meandering and wrinkles during web conveyance.

As another means, a crown roll may be used for the nip roll. This is a roll having a crown shape for deflection, and is deformed at the time of nip so that the nip surface becomes horizontal.

However, in this method, the roll shape cannot be determined unless the force applied to the roll is known in advance, and it is difficult to calculate the crown amount, and high machining accuracy is required in production. Further, when a change in the crown amount occurs due to a change in load or the like, it is necessary to newly manufacture a roll. In addition, if the crown amount is not appropriate, there is a problem in that a difference in diameter between the thick central portion and the thin end portions can cause a difference in the peripheral speed of the roll surface, causing wrinkles on the web or causing meandering.

  As another means, a backup roll that suppresses the deflection of the nip roll may be used outside the nip roll. This is a method of using a large-diameter roll having high rigidity without bending as a backup roll.

However, with this method, the roll shape cannot be determined unless the force applied to the roll is known in advance, and it is necessary to manufacture a new roll when a change in the backup roll shape occurs due to a load change or the like. there were. Furthermore, since the backup roll is heavy, it is dangerous to replace the roll, and the nip roll needs to be replaced.
Japanese Patent No. 3505921

  The present invention solves the above problems, and provides a web transport apparatus and a web transport method that do not cause wrinkles or meander in web transport and enable high-precision and high-speed transport and high-definition processing. With the goal.

In order to solve the above problems, the invention of claim 1 of the present invention is a web transport device for transporting a web by roll-to-roll, wherein at least the shaft and the outer periphery of the cylindrical member are covered with an elastic body. A roll having an elastic roll rotatably supported on the shaft via a bearing; two roll holders for holding the roll shaft from the left and right; and a roll for fixing the roll shaft to the roll holder. A fixing jig and the roll holder are connected from the left and right, and a roll deflection amount adjusting mechanism capable of changing the distance between the left and right roll holders, and swinging on the roll provided at the end of the roll holder And a swing fulcrum for transmitting the web.

Next, the invention according to claim 2 of the present invention is the web conveyance device according to claim 1, wherein the roll is a nip roll.

Next, the invention according to claim 3 of the present invention is the web conveyance device according to claim 1 or 2, wherein the roll is a conveyance roll.

Next, the invention according to claim 4 of the present invention is the web conveyance device according to any one of claims 1 to 3, further comprising a tension control system that makes the web have a constant tension.

  Next, the invention according to claim 5 of the present invention is the web conveyance device, wherein the roll deflection adjustment mechanism uses any of a nut, a pneumatic cylinder, and a motor.

  Next, a sixth aspect of the present invention is a web conveying method using the web conveying device according to any one of the first to fifth aspects.

  According to the first to third aspects of the present invention, in the apparatus for conveying a roll-to-roll web, at the time of nip with a highly rigid conveyance roll, the bending of the roll is suppressed and a uniform contact pressure is obtained in the web width direction. It was. In the web conveyance, the tension is uniform in the web width direction, there is no wrinkling or meandering, and the web can be stabilized without shifting at the nip portion, enabling high-precision and high-speed conveyance. In addition, it can be transported without being damaged by partial elongation of the web. Since the stress is uniform in the web width direction and the tension can be cut uniformly in the width direction without being affected by the tension on the winding side, high-definition patterning and the like can be performed on the web. In the case of laminating at the nip portion, uniform adhesion is possible in the web width direction, and lamination without air entrainment is possible. Furthermore, since the nip roll is provided with a roll deflection adjustment mechanism, it is not necessary to use a nip roll with a large diameter and high rigidity, and a roll with a small diameter, light weight, and a small moment of inertia can be used. High-speed conveyance became possible. As a result, productivity and maintainability were improved.

  According to the third aspect of the present invention, by providing the roll deflection amount adjusting mechanism in both the transport roll and the nip roll, the deflection of both the transport roll and the nip roll can be arbitrarily adjusted. For this reason, a more uniform contact pressure was obtained in the web width direction at the time of nip, and there was no wrinkling or meandering in the web conveyance, and high-precision, high-speed conveyance and high-definition processing could be realized. In addition, since both rolls are equipped with a roll deflection adjustment mechanism, both rolls do not need to have large diameter and high rigidity, and the rolls are small in diameter and light in weight and have a small moment of inertia. High-speed conveyance became possible, and as a result, productivity and maintainability were improved.

  According to the invention of claim 4, since the web is transported with a uniform tension in the width direction of the web, no wrinkles or meandering occurs, and the web is stabilized without shifting at the nip portion.・ High speed conveyance is possible.

  According to the invention of claim 5, since the amount of deflection of the roll can be adjusted efficiently and stably, a more uniform contact pressure can be obtained in the web width direction at the time of nip. It was possible to achieve high precision, high speed conveyance and high definition.

  According to the web conveyance method of claim 6, there is no wrinkle generation and meandering, and high-precision and high-speed conveyance and high-definition processing can be realized.

  The web conveyance device and the conveyance method thereof according to the present invention will be described in detail below along the embodiments with reference to the drawings. 1 to 5 show an embodiment of the present invention.

  As shown in FIG. 1, the web conveying apparatus and the conveying method of the present invention are a web unwinding 1 having a tension control function of a roll-to-roll web 2, and during or after the processing of the web. 1 is a web transport apparatus having a transport roll 4 having a drive system for transporting or laminating the web 2 and a nip roll 5 for contacting the transport roll 4.

  The web 2 is fed out from the unwinding 1 while controlling the back tension and constant tension by feeding back the detected tension value from the tension sensor 3 to the web unwinding 1 having a tension control function.

  The web 2 under constant tension control is controlled by pulse drive control by a servo motor or the like, and a roll roll 4 that nips with a uniform contact pressure in the width direction of the web 2 with the conveyance roll 4 that is intermittently or continuously driven. The nip roll 5 provided with a mechanism generates a uniform tension in the width direction of the web 2, does not generate wrinkles and meanders, and transports with high accuracy and high speed, and holds it by a uniform tension cut in the width direction.

  The web 2 is conveyed with high accuracy with a uniform tension in the width direction or held by a uniform tension cut in the width direction, and high-definition processing is performed on the web 2 without distortion in the processing process.

  Also, when laminating the film fed from the web 2 and the film unwinding 6, the film is laminated uniformly in the width direction of the web by the uniform contact pressure in the width direction at the nip portion, and the air is not entrapped. .

  Next, the roll deflection amount adjusting mechanism of the present invention will be described with reference to FIGS.

  FIG. 2 shows a nip roll 5 having a roll deflection amount adjusting mechanism. The nip roll 5 is an elastic roll in which an elastic body such as rubber is coated on the outer periphery of a cylindrical member (core metal). It is a free roll that is rotatably supported via a bearing, contacts the entire width of the web with a pressure mechanism, and follows the transport roll 4. The elastic body such as rubber is made into an optimum combination for the web 2 by changing the material, the elastic coefficient, the friction coefficient, and the spherical curvature according to the type of the web 2. The cylindrical member (core metal) and the shaft are made of a rigid material such as metal. Further, the nip roll itself may be driven to synchronize with the transport roll or to be coupled and driven.

  The nip roll 5 is held by left and right roll holders 8 and a roll fixing jig 9. The roll holder 8 has a rocking fulcrum 10 and is connected by a right screw 11, a left screw 12, and a roll deflection amount adjusting mechanism (roll deflection amount adjusting nut 13 in the drawing). By rotating the roll deflection adjustment nut 13, each of the right screw 11 and the left screw 12 generates an inward force toward the roll deflection adjustment nut 13 by the screw force, and the roll holder 8 is shaken by the force. It is made to swing in the direction shown in FIG. The nip roll 5 held by the roll holder 8 is caused to bend optimally at the nip as shown in FIG. 5 by the force of swinging the roll holder 8 in the direction shown in FIG. The roll deflection amount adjustment may be automatic adjustment instead of manual nut adjustment. For example, if adjustment is possible using a pneumatic cylinder, a hydraulic cylinder, a motor, or the like, the amount of deflection of the roll can be numerically managed. Further, a structure (not shown) in which a numerical value can be managed by installing a dial gauge or the like in the roll holder 8 may be adopted.

In the present invention, the roll holder 8 is for holding the nip roll 5 and enabling the nip roll 5 to swing to give the nip an optimum deflection. Specifically, the roll holder 8 has rigidity such as metal. Material can be used.
In the present invention, the fixing jig 9 is for fixing the nip roll 5 to the roll holder 8, and specifically, a rigid material such as metal can be used.
In the present invention, the oscillating fulcrum is for oscillating the roll holder 8. Specifically, the oscillating fulcrum is made of a rigid material such as metal, and has a structure that is rotatably supported via a bearing such as a bearing. Can be used.
In the present invention, the right screw 11 and the left screw 12 are for generating a force for swinging the roll holder 8 by the force of the screw. Specifically, the roll holder 8 is made of a rigid material such as metal. It is possible to use a structure that is rotatably supported by a coupling portion with a bearing such as a bearing.

  Further, the nip roll 5 having the structure shown in FIG. 2 is light in weight because it can be made small in diameter, easy to install the nip roll 5 and easy to replace the roll, and to be able to adjust the deflection of the roll with a simple structure. , Maintenance can be improved.

  The transport roll 4 has a large diameter and high rigidity compared to the nip roll 5 and is not easily bent. The cylindrical member (core metal) and the shaft are made of a rigid material such as metal. The transport roll 4 is coupled to a motor 15 that is pulse-controlled by a coupling 14 and is driven intermittently or continuously with high accuracy.

  The nip roll 5 that has generated the optimum deflection in the nip is pressed against the transport roll 4 by a pressurizing mechanism (not shown), so that no gap is generated at the center in the longitudinal direction of the roll as shown in FIG. Nip with uniform contact pressure in the width direction. Pressurization is performed by a pneumatic cylinder, hydraulic cylinder, motor, etc., and the pressure can be controlled numerically.

  Further, the transport roll 4 may have a structure having a pressurizing mechanism like the nip roll 5.

FIG. 3 shows that the roll deflection adjustment mechanism is provided for both the nip roll 5 and the transport roll 4, and the deflection of both the nip roll 5 and the transport roll 4 can be adjusted arbitrarily. A uniform contact pressure can be obtained.

  In addition, both the nip roll 5 and the transport roll 4 having the structure shown in FIG. 3 can have a small diameter, are light in weight, can be easily replaced, and can be easily replaced. Also, the flexure of the roll can be adjusted with a simple structure. Therefore, maintainability can be improved.

FIG. 4 shows a nip roll 5 that is provided with a roll deflection amount adjusting mechanism separately on the left and right ends of the roll. The roll holder 8 has a rocking fulcrum 10 and is provided with roll deflection amount adjusting bolts 16 separately on the left and right sides. By rotating the roll deflection amount adjusting bolt 16, the left and right roll holders 8 are rocked independently on the left and right sides. Fine adjustment is performed to cause the nip roll 5 to bend in an optimal balance at the nip. The roll deflection amount adjustment may be automatic adjustment instead of manual bolt adjustment. For example, if adjustment is possible using a pneumatic cylinder, a hydraulic cylinder, a motor, etc., the amount of deflection of the roll can be numerically managed on the left and right sides. Further, a structure (not shown) in which a dial gauge or the like is installed in the roll holder 8 and left and right numerical management can be performed.

It is explanatory drawing which shows the front of one Example of the web conveyance apparatus of this invention. It is explanatory drawing which shows the front of 1st Embodiment of the bending amount adjustment mechanism of the roll of this invention. It is explanatory drawing which shows the front of 2nd Embodiment of the bending amount adjustment mechanism of the roll of this invention. It is explanatory drawing which shows the front of 3rd Embodiment of the bending amount adjustment mechanism of the roll of this invention. It is explanatory drawing which shows operation | movement of 1st Embodiment of the deflection amount adjustment mechanism of the roll of this invention. It is explanatory drawing which shows the state of the bending of a nip roll. It is explanatory drawing which shows the state which improved the bending of the nip roll.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Web unwinding 2 ... Web 3 ... Tension sensor 4 ... Conveying roll 5 ... Nip roll 6 ... Film unwinding 7 ... Winding 8 ... Roll holder 9 ..Roll fixing jig 10 ... Oscillation fulcrum 11 ... Right screw 12 ... Left screw 13 ... Roll deflection adjustment nut 14 ... Coupling 15 ... Motor 16 ... Roll Deflection adjustment bolt

Claims (6)

In a web transport device that transports the web in a roll-to-roll manner,
At least a shaft, and a roll having an elastic body roll that covers an outer periphery of a cylindrical member and is rotatably supported on the shaft via a bearing ;
Two roll holders each holding the axis of the roll from the left and right;
Roll fixing jigs for respectively fixing the roll shafts to the roll holder;
The roll holder is connected from the left and right, and a roll deflection amount adjusting mechanism capable of changing the distance between the right and left roll holders;
A web conveyance device comprising: a rocking fulcrum for transmitting the rocking motion to a roll provided at an end of the roll holder.   The web conveyance device according to claim 1, wherein the roll is a nip roll.   The web conveyance device according to claim 1, wherein the roll is a conveyance roll.   The web conveyance device according to any one of claims 1 to 3, further comprising a tension control system that makes the web have a constant tension.   The roll deflection adjusting mechanism uses a nut, a pneumatic cylinder, or a motor.   A web conveyance method using the web conveyance device according to claim 1.

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