JP4239369B2 - Web meandering control device and ceramic green sheet manufacturing equipment using this meandering control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a meander control device for controlling meandering of a web.
[0002]
[Prior art]
Conventionally, as a device for manufacturing ceramic green sheets for multilayer electronic components, a web in which a green ceramic layer is formed on a long carrier film is continuously printed in an electrode film printing process, drying process, punching process, etc. An apparatus is known in which a ceramic green sheet is obtained by sequentially passing a plurality of processes (see Japanese Patent No. 2504277). While passing through such a process, the web may partially stretch and meander.
[0003]
As a device for correcting such meandering of the web, Japanese Patent Application Laid-Open No. 5-124758 discloses that two guide rolls for transporting the web are arranged at regular intervals on a rotatable support base. A meandering amount detector is provided between the guide rollers for detecting the positional deviation of the end portion in the width direction of the web conveyed with respect to a predetermined reference position, and is supported based on information obtained from the meandering amount detector. There has been proposed a meander control device that rotates a table and appropriately corrects the meandering of the web.
[0004]
By the way, when a long web is continuously conveyed, a tension control device called a dancer roll is provided at an appropriate position on the web conveyance path in order to control the tension of the web and absorb the difference in the feeding amount between each process. Is provided.
FIG. 1 shows an example of a swing arm type tension control device. The web 70 is fed in the order of guide rolls 71, 72, 73. The tension of the web 70 is detected by a tension detection sensor (not shown), and the actuator 74 such as a cylinder is controlled to drive the swing arm 76 fixed to the shaft 75 and to be attached to the tip of the swing arm 76. The tension is controlled by moving 72 up and down.
[0005]
[Problems to be solved by the invention]
However, since the meandering control device and the tension control device are conventionally configured as independent devices, it has been necessary to separately provide these devices in the web conveyance path. Therefore, the following various problems have occurred.
That is, when the tension control device is provided on the upstream side of the meandering control device, the web tension may vary with respect to the set value due to the inertia of the guide roll of the meandering control device. On the contrary, if the meandering control device is provided on the upstream side of the tension control device, meandering may occur again on the web that has passed through the tension control device.
[0006]
In addition, each of the meandering control device and the tension control device requires a plurality of guide rolls, but by providing these devices individually, the number of guide rolls increases, and the unit price of the guide rolls is high. In addition to an increase in equipment cost, there is a drawback that the installation space is increased and the apparatus is increased in size.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a small and inexpensive meandering control device that can maintain the web tension properly, eliminate the meandering of the web, and reduce the number of guide rolls.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 includes a movable base, parallel guide rolls provided at predetermined positions on the upstream and downstream sides of the web with the movable base in between, and a movable base on the movable base. Provided with a tension control means for controlling the tension of the web and a drive means for moving the movable base in a direction in which the web is displaced in the width direction. A web meandering control device for controlling the meandering of a web while applying a predetermined tension by conveying the web to a guide roll, wherein the tension control means is a first supported rotatably on a movable base. A guide roll, a second guide roll rotatably supported on the movable base in parallel with the first guide roll, and rotation of the first guide roll A swing arm that is swingably mounted on a movable base around an axis that is coaxial or parallel to the axis, a tension adjusting actuator that swings and rotates the swing arm, and a swing arm that is rotatably mounted at the tip of the swing arm. And a tension roll, and the web conveyed from the upstream guide roll is conveyed to the downstream guide roll via the first guide roll, the tension roll, and the second guide roll. A meandering control device is provided.
[0009]
In the present invention, a movable base having tension control means is disposed between the upstream and downstream guide rolls, and the meandering of the web is controlled by moving the movable base. In other words, by integrating the tension control device into the meandering control device, the web tension is set against the set value due to the problems caused by providing these devices individually, that is, due to the inertia of the guide roll of the meandering control device. It is possible to eliminate problems such as variations and meandering again in the web that has passed through the tension control device. Further, by sharing the guide roll of the meander control device and the guide roll of the tension control device, the number of guide rolls can be reduced compared to the case where the meander control device and the tension control device are provided separately, An inexpensive and small meandering control device can be realized.
The direction in which the movable base is moved may be either rotation or translation as long as the web is displaced in the width direction.
[0010]
In the present invention, the tension control means includes a first guide roll rotatably supported on the movable base, and a second guide roll rotatably supported parallel to the first guide roll on the movable base. A swing arm swingably mounted on a movable base about an axis that is coaxial with or parallel to the rotation axis of the first guide roll, a tension adjusting actuator that swings and rotates the swing arm, and a swing arm A tension roll rotatably attached to the tip of the web, and the web conveyed from the upstream guide roll passes through the first guide roll, the tension roll, and the second guide roll to the downstream guide roll. It is configured to be conveyed. That is, by using a swing arm type tension control device as the tension control means, it is possible to realize a small meandering control device having a simple structure. As a tension adjusting actuator for swinging and rotating the swing arm, a motor or a cylinder can be used.
[0011]
As a driving means for moving the movable base in a direction in which the web is displaced in the width direction as in claim 2 , a rotary support mechanism that rotatably supports the movable base around the upstream guide roll and a movable base are provided. A thing provided with the actuator for meander control which rotates centering on a rotation support mechanism is desirable.
When controlling the meandering of the web, if the movable base is rotated around the upstream guide roll, the upstream and downstream sides of the web are twisted together, and the stress changes that occur in the web with respect to the displacement of the movable base. This is desirable because it is relatively small and the change occurs almost evenly on both edges of the web. As the meandering control actuator for rotating the movable base, various methods such as those using a motor and a ball screw mechanism and those using a motor and a gear mechanism can be used.
[0012]
As in claim 3, it is preferable to provide the meandering amount detecting sensor for detecting the web end position is conveyed between the tension control means and the downstream guide roll. That is, after moving the movable base, whether the meandering of the web has been eliminated can be determined from the state of the web passing through the downstream guide roll. Therefore, the presence or absence of meandering can be easily detected by detecting the position of the end of the web conveyed between the tension control means and the downstream guide roll with a sensor.
The end position of the web can be detected inside the tension control means, but when the movable base moves, the web meanders between the output-side guide roll and the downstream-side guide roll of the tension control means. Since the amount changes, the exact meandering amount of the web cannot be detected inside the tension control means. Therefore, an accurate meandering amount can be detected by detecting the end position of the web conveyed between the tension control means and the downstream guide roll.
[0013]
According to a fourth aspect of the present invention, it is preferable to provide a tension detection sensor for detecting the tension of the web at a portion that supports the shaft of the guide roll. That is, by detecting the tension of the web transported by the guide roll, the tension of the tension control means can be known, so that the tension of the web can be accurately controlled by the tension control means.
In this case, a known load sensor such as a load cell can be used as the tension detection sensor.
[0014]
According to a fifth aspect of the present invention, the meandering control device according to the present invention is applied to the ceramic green sheet manufacturing apparatus disclosed in Japanese Patent No. 2504277. That is, in the course of manufacturing the ceramic green sheet, for example, in the drying process, the web is heated, so that the web partially stretches, and the web may meander or the tension may fluctuate due to the stretch. Such web meandering and tension fluctuations cause defects at the punching station where the highest positional accuracy is required. Therefore, by arranging the meandering control device of the present invention in front of the punching station where the highest positional accuracy is required, that is, between the drying station and the punching station, the web can be positioned with high accuracy at the punching station. Quality ceramic green sheets can be manufactured.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 shows an example of a ceramic green sheet manufacturing apparatus using the meander control apparatus 30 according to the present invention.
This example is an improvement of a part of the apparatus shown in Japanese Patent No. 2504277. That is, reference numeral 1 denotes a web in which a green ceramic layer is continuously formed on a long carrier film. The web 1 is drawn from a supply reel 2 as a supply source with the green ceramic layer facing upward, It is wound up by the winding reel 3 at the end. A take-up roll 4 is provided immediately after the supply reel 1, and a take-up roll 5 is provided immediately before the take-up reel 3. The rolls 4 and 5 are intermittently driven in synchronization. As these rolls 4 and 5, for example, suction rolls are used. The rotation angle of the rolls 4 and 5 is detected by an encoder or the like, and the detection signal is sent to the controller 6. A drive motor (not shown) for intermittently driving the rolls 4 and 5 is controlled by the controller 6.
The web 1 drawn out from the supply reel 2 by the unwinding roll 4 is then guided to the green ceramic layer defect detection unit 7 where the defect of the green ceramic layer is detected visually or by the optical detector 8, and the information is obtained. It is sent to the controller 6.
[0016]
Next, the web 1 is led to the printing station 9. In the printing station 9, a conductive film is printed on the surface of the green ceramic layer of the web 1 with a conductive paste. Therefore, the screen 10, the scraper 11, the squeegee 12, etc. are arranged.
The printed web 1 is guided to a print defect detection unit 13 where a print defect is detected visually or by an optical detector 14 and the information is input to the controller 6. The controller 6 controls the operation in a punching station 19 to be described later so that the defective printing portion is not used when the ceramic green sheets are laminated.
[0017]
Next, the web 1 is guided to a drying station 15 that dries the conductive film printed at the printing station 9. In the drying station 15, a drying furnace 16 including a hot air nozzle 17 that blows hot air from above and a hot platen 18 that heats and heats the heat from the lower surface of the web 1 is disposed. In addition, you may dry using heat rays, such as infrared rays.
[0018]
Next, the web 1 is guided to the punching station 19 through the meandering control device 30 according to the present invention. In the meandering control device 30, the tension of the web 1 is controlled, the difference between the feeding amount of the web 1 in the printing station 9 and the feeding amount in the punching station 19 is absorbed, and the meandering of the web 1 is further corrected. The meandering control device 30 will be described in detail later.
[0019]
The punching station 19 is provided with a pickup device 20 having a cutting blade 21 for forming a cutting line in the green ceramic layer. When the pickup device 20 is lowered, the cutting blade 21 forms a closed loop cutting line on the green ceramic layer, and the pickup device 20 adsorbs the green ceramic layer and rises, so that the region surrounded by the cutting line is formed. The green ceramic layer is peeled from the carrier film, and the ceramic green sheet is taken out. The ceramic green sheets thus taken out are stacked on another stacking table, or a plurality of ceramic green sheets are stacked and held in a region surrounded by the cutting blade 21 of the pickup device 20 to obtain a stacked sheet. be able to.
The web 1 after the green ceramic layer is taken out as a ceramic green sheet at the punching station 19 is taken up on the take-up reel 3 via the take-up roll 5, and the series of steps is completed.
[0020]
FIG. 3 shows an example of the meandering control device 30.
On a fixed base 31 that is horizontally fixed at a fixed position, a movable base 33 is rotatably supported in a horizontal direction via a rotation support mechanism 32 having a built-in bearing. Reference numeral 34 denotes a central axis of the rotation support mechanism 33, that is, a rotation axis of the movable base 33.
A nut member 35 is rotatably attached to the lower surface of the movable base 33 at a position away from the rotation shaft 34, and a ball screw 36 is screwed to the nut member 35. Both ends of the ball screw 36 are rotatably supported on a mounting base 38 that is rotatably mounted on the fixed base 31 via a support shaft 37. A meandering control actuator 39 such as a servo motor fixed on a mounting base 38 is connected to one end of the ball screw 36. By driving the actuator 39, the movable base 33 is moved horizontally around the rotation axis 34. It can be rotated in the direction (arrow X direction).
[0021]
On the upper surface of the movable base 33, a swing arm type tensioner 40 as tension control means is provided. The tensioner 40 includes a shaft 41 rotatably supported on the movable base 33, a first guide roll 42 rotatably supported around the shaft 41, a pair of swing arms 43 fixed to the shaft 41, and a swing arm 43. A tension roll 44 rotatably attached to the tip of the shaft, a tension adjusting actuator 45 connected to one end of the shaft 41, and the tension roll 44 on the movable base 33 are arranged in parallel with the first guide roll 42. The second guide roll 46 and the like. As the tension adjusting actuator 45, a servo motor excellent in responsiveness is desirable. In addition, a motor provided with a brake mechanism is desirable so that a predetermined position can be maintained when power is not supplied. The first guide roll 42 is disposed in the vicinity of the rotating shaft 34 of the movable base 33. When the actuator 45 is driven while the web 1 is wound around the second guide roll 46 from the first guide roll 42 via the tension roll 44, the swing arm 44 moves in the vertical direction (arrow Y direction) about the shaft 41. Since the tension roll 44 swings and moves in the vertical direction, the conveyance length of the web 1 changes, and the tension of the web 1 can be freely controlled.
[0022]
An upstream guide roll 52 is rotatably supported on a support base 50 fixed at a fixed position above the first guide roll 42, that is, in the vicinity of the rotating shaft 34 of the movable base 33. Both ends of the shaft of the upstream guide roll 52 are supported by a tension detection sensor 51 such as a load cell. A downstream guide roll 53 that is substantially the same height as and parallel to the upstream guide roll 52 and is parallel to the second guide roll 46 is rotatably supported. When the web 1 is continuously wound around the downstream guide roll 53 from the upstream guide roll 52 via the tensioner 40, the web 1 is conveyed in the vertical direction between the upstream guide roll 52 and the first guide roll 42. Then, the web 1 is conveyed in the vertical direction between the second guide roll 46 and the downstream guide roll 53. The web 1 is conveyed in the direction of the arrow by the winding roll 21 described above.
[0023]
The tension detection sensor 51 detects the tension of the web 1 conveyed on the upstream guide roll 52, and this information is sent to the controller 5 to control the tension adjusting actuator 45. That is, by performing feedback control of the actuator 45 so that the tension of the web 1 becomes a set value, the tension of the web 1 conveyed on the downstream side guide roll 53 can be always kept constant.
[0024]
A meandering amount detection sensor 55 is fixed on the fixed base 31 via a bracket 54. The meandering amount detection sensor 55 detects the position of the end portion of the web 1 that is conveyed in the vertical direction between the second guide roll 46 and the downstream guide roll 53, and the information of this sensor 55 is also sent to the controller 5. It is done. The controller 5 controls the meandering control actuator 39 based on information from the sensor 55. That is, when the movable base 33 is rotated by the actuator 39 based on the information from the sensor 55, the position in the width direction of the web 1 conveyed on the downstream side guide roll 53 changes, and the meandering of the web 1 can be eliminated. it can.
[0025]
When the meandering control device and the tension control device are provided separately as in the prior art, usually four guide rolls for the meandering control device and three guide rolls for the tension control device are required. Guide rolls are required. On the other hand, in the meandering control device of the above embodiment, the first and second guide rolls 42 and 46 constituting the tensioner 40 also serve as the guide rolls of the meandering control device. The rolls 52 and 53 and the three rolls 42, 44, and 46 constituting the tensioner can be constituted by a total of five rolls. Therefore, two guide rolls can be reduced.
[0026]
FIG. 4 shows another embodiment of the meandering control device according to the present invention.
FIG. 4 illustrates only the relationship between the movable base 33 and the fixed base 31, and the tensioner provided on the movable base 33 and the upstream and downstream guide rolls are omitted.
In the case of the embodiment of FIG. 3, the movable base 33 is rotatably supported by the rotation support mechanism 33, but in FIG. 4, the movable base 33 can rotate with respect to the fixed base 31 via the two arms 60 and 61. Supported by The rotation center 62 of the movable base 33 in this case is also preferably arranged in the vicinity of the upstream guide roll 52 as in FIG.
In the case of this embodiment as well, the meandering of the web 1 can be corrected while maintaining an appropriate tension as in FIG.
[0027]
The meandering control device of the present invention is not limited to the structure shown in FIGS.
For example, although a swing arm type tensioner is provided as a tensioner, other types of tensioners such as a linear movement type tensioner may be provided.
In the case of the swing arm type, instead of driving the swing arm shaft as an actuator for swinging the swing arm, the part of the swing arm opposite to the tension roll is operated with a cylinder or the like as shown in FIG. Thus, the swing arm may be swung. In this case, the swing axis of the swing arm may be coaxial with the first guide roll or the second guide roll, or may be different from these axes.
Further, as shown in FIG. 3, it is not necessary to dispose the movable base having the tensioner below the upstream guide roll and the downstream guide roll, and the movable base is disposed above the upstream guide roll and the downstream guide roll. May be. In this case, the winding direction of the web wound around each roll is reversed.
[0028]
【The invention's effect】
As apparent from the above description, according to the present invention, since the tension control device is integrally incorporated in the meandering control device, it is possible to eliminate the meandering of the web while maintaining the web tension properly. Further, by sharing the guide roll of the meander control device and the guide roll of the tension control device, the number of guide rolls can be reduced compared to the case where the meander control device and the tension control device are provided separately, A small and inexpensive meandering control device can be realized.
[Brief description of the drawings]
FIG. 1 is a perspective view of an example of a conventional tension control device.
FIG. 2 is an overall process diagram of a ceramic green sheet manufacturing apparatus to which a meandering control apparatus according to the present invention is applied.
FIG. 3 is a perspective view of an example of a meandering control device according to the present invention.
FIG. 4 is a perspective view of a main part of an example of a meandering control device according to the present invention.
[Explanation of symbols]
1 Web 30 Meander Control Device 32 Rotation Support Mechanism 33 Movable Base 39 Meander Control Actuator 40 Tensioner (Tension Control Means)
42 first guide roll 43 swing arm 44 tension roll 45 tension adjusting actuator 46 second guide roll 51 tension detection sensor 52 upstream guide roll 53 downstream guide roll 55 meandering amount detection sensor

Claims (5)

A movable base,
Parallel guide rolls provided at predetermined positions on the upstream and downstream sides of the web with the movable base in between,
A tension control means provided on the movable base for controlling the tension of the web;
Driving means for moving the movable base in the direction in which the web is displaced in the width direction,
A web meandering control device for controlling meandering of a web while applying a predetermined tension by conveying the web from an upstream guide roll to a downstream guide roll via a tension control means ,
The tension control means is
A first guide roll rotatably supported on a movable base;
A second guide roll rotatably supported on the movable base in parallel with the first guide roll;
A swing arm swingably mounted on a movable base about an axis that is coaxial with or parallel to the rotation axis of the first guide roll;
A tension adjusting actuator that swings and rotates the swing arm;
A tension roll rotatably attached to the tip of the swing arm,
The web meandering control apparatus, wherein the web conveyed from the upstream guide roll is conveyed to the downstream guide roll through the first guide roll, the tension roll, and the second guide roll . The drive means is
A rotation support mechanism that rotatably supports the movable base with the vicinity of the upstream guide roll as a fulcrum;
2. The web meandering control apparatus according to claim 1 , further comprising a meandering control actuator for rotating a movable base about the rotation support mechanism. 3. A meandering web according to claim 1, further comprising a meandering amount detection sensor for detecting an end position of the web conveyed between the tension control means and the downstream guide roll. Control device. A portion supporting the shaft of the guide roll, web meandering control device according to any one of claims 1 to 3, characterized in that a tension sensor for detecting the web tension. A supply source for supplying a long web having a green ceramic layer continuously formed on the surface of the carrier film;
A printing station that prints a conductive film on the surface of the green ceramic layer with a conductive paste on the web drawn from the supply source;
A drying station for drying the conductive film on the web that has passed through the printing station;
For the web that has passed through the drying station, a green ceramic layer is punched at a position aligned with the conductive film, and a punching station for peeling the ceramic green sheet from the carrier film is provided.
An apparatus for producing a ceramic green sheet, wherein the meandering control device according to any one of claims 1 to 4 is provided at least between a drying station and a punching station.

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