JP2021030123A - Eccentricity detection device, eccentricity adjusting device, and coating device - Google Patents

Abstract

To provide an eccentricity detection device capable of detecting the eccentricity of a rotary shaft of a roll and a drive shaft of a driving device, an eccentricity adjusting device using the eccentricity detecting device, and a coating device using the eccentricity adjusting device.SOLUTION: An eccentricity detection device has a back-up roll 48, a driving device including a roll motor 70 for rotating the back-up roll 48, a coupling portion coupling a drive shaft 74 of the driving device and a roll rotary shaft 64 of the back-up roll 48, a torque meter 78 provided on the coupling portion and measuring rotation torque of the roll rotary shaft 64, and a control unit 80 determining that the driving shaft 74 and the roll rotary shaft 64 are eccentrically coupled when the rotation torque detected by the torque meter 78 is larger than a reference torque value.SELECTED DRAWING: Figure 3

Description

The present invention relates to an eccentricity detecting device, an eccentricity adjusting device, and a coating device.

Conventionally, when coating a web running on a backup roll with a die, a die is arranged in the vicinity of the backup roll, and the coating liquid is pumped from a pump to the liquid reservoir inside the die, and the coating liquid is pumped to this liquid reservoir. Apply the coating liquid to the web from the outlet of the die that leads to it.

Japanese Patent No. 5593967

In the above-mentioned coating device, there is a problem that the rotation axis of the backup roll is eccentric with the drive axis of the drive device such as a roll motor due to changes over time and assembly accuracy, and the rotation accuracy is lowered. It was.

Therefore, in view of the above problems, the present invention provides an eccentricity detecting device capable of detecting the eccentricity between the rotating shaft of a roll such as a backup roll and the driving shaft of the driving device, an eccentricity adjusting device using this eccentricity detecting device, and the eccentricity adjusting device. It is an object of the present invention to provide the coating apparatus used.

In the first embodiment of the present invention, the roll, a drive device including a motor for rotating the roll, a connecting portion for connecting the drive shaft of the drive device and the rotating shaft of the roll, and the connecting portion It is determined that the drive shaft and the rotation shaft are eccentrically connected to each other when the rotation torque detected by the torque meter is larger than the reference torque value. It is an eccentricity detection device having a control unit.

A second embodiment of the present invention includes a roll, a drive device including a motor for rotating the roll, a connecting portion for connecting the drive shaft of the drive device and the rotation shaft of the roll, and the connection. When a torque meter provided in the unit for measuring the rotational torque of the rotating shaft, a moving unit for moving the roll in a direction orthogonal to the rotating shaft, and a rotational torque detected by the torque meter are larger than a reference torque value. A control unit that determines that the drive shaft and the rotation shaft are eccentrically connected to each other and moves the roll by the moving unit so that the detected rotation torque is within the reference torque value. It is an eccentricity adjusting device.

Further, the third embodiment of the present invention is a coating device having the eccentricity adjusting device of the second embodiment, and has a base and a unit body attached to the base. The unit body includes the roll, the first moving portion, the second moving portion, and a coating portion for applying a coating liquid to the web traveling on the roll, and the base includes the roll, the first moving portion, and the coating portion for applying the coating liquid to the web traveling on the roll. , The coating device provided with the driving device and the connecting portion.

When the rotational torque of the rotating shaft of the roll is larger than the reference torque value, it can be determined that the driving shaft of the driving device and the rotating shaft of the roll are eccentric.

It is a side view of the coating apparatus which shows one Embodiment of this invention. It is a top view of the coating apparatus. It is a partially cutaway front view which shows the relationship between a backup roll and a roll motor. It is a 1st figure which shows the relationship between the arm part and the 1st eccentric cam. It is the 2nd figure which shows the relationship between the arm part and the 1st eccentric cam. It is a 3rd figure which shows the relationship between the arm part and the 1st eccentric cam. FIG. 1 is a first diagram showing the relationship between the end face and the second eccentric cam. It is the 2nd figure which shows the relationship between an end face and a 2nd eccentric cam. FIG. 3 is a third diagram showing the relationship between the end face and the second eccentric cam. It is a block diagram of a coating device. It is a graph which shows the state of the rotational torque at θ = 0 °. It is a graph which shows the state of the rotational torque at θ = 0.19 °. It is a graph which shows the change state of the rotational torque at θ = 0.28 °. It is a graph which shows the change state of the rotational torque at θ = 0.38 °. It is a graph which shows the relationship of the rotational torque at θ = 0.47 °.

Hereinafter, the eccentricity detecting device, the eccentricity adjusting device, and the coating device 10 using the eccentricity detecting device and the eccentricity adjusting device according to the embodiment of the present invention will be described with reference to FIGS.

(1) Coating device 10
The coating apparatus 10 will be described with reference to FIGS. 1 to 3. The coating device 10 is a coating device that coats a coating liquid on a long web W such as a film, a cloth, paper, or a metal foil. Here, a three-axis Cartesian coordinate system is used to represent the position and direction of the coating device 10, and the front-rear direction is the x-axis direction, the left-right direction is the y-axis direction, and the vertical direction is the z-axis direction.

As shown in FIGS. 1 and 2, the coating device 10 includes a base 12 and a unit body 14 that moves to the base 12 in the front-rear direction and is attached to the base 12.

(2) Base 12
As shown in FIGS. 1 and 2, the base 12 has a pair of left and right legs 15 and 15, and the legs 15 and 15 are installed on a horizontal floor. A pair of left and right wall bodies 16, 16 are erected from the legs 15, 15. Four carry-in rolls 18, 20, 22, and 24 are rotatably arranged in the left-right direction (y-axis direction) between the upper parts of the pair of left and right wall bodies 16, 16. Further, on the upper part of the pair of left and right wall bodies 16, 16, the carry-out roll 26 is also rotatably arranged in the left-right direction (y-axis direction).

Below the four carry-in rolls 18, 20, 22, 24 and the carry-out roll 26, a pair of left and right mounting recesses 28, 28 are cut at the rear of the pair of left and right wall bodies 16, 16 as shown in FIG. Missing. The end face 30 at the rear of the mounting recess 28 is formed linearly in the vertical direction (z-axis direction).

As shown in FIG. 1, a pair of left and right arm portions 32, 32 are rotatably provided around a fulcrum 34 on the upper part of the pair of left and right wall bodies 16, 16, and lifted above the front end of the arm portion 32. A lifting device 40 including an air cylinder, which is a device 40, is provided in the vertical direction. The rear end of the arm portion 32 protrudes from the wall body 16 and is located in a space surrounded by the mounting recess 28. A triangular lifting recess 36 is cut out in the upper part of the rear end of the arm portion 32. The lower end of the cylinder portion 42 of the air cylinder, which is the lifting device 40, is connected to the front end of the arm portion 32 via the rotating shaft 38. When the cylinder portion 42 of the lifting device moves up and down, the arm portion 32 rotates via the fulcrum 34, and the lifting recess 36 of the arm portion 32 moves up and down.

(3) Unit body 14
Next, the unit body 14 will be described with reference to FIGS. 1 and 2.

As shown in FIGS. 1 and 2, the unit body 14 moves the rollers and rails 45 and the like so as to be movable in the front-rear direction (x-axis direction) between the pair of left and right legs 15 and 15 of the base 12. The device 44 is provided at the bottom.

As shown in FIGS. 1 and 2, a pair of left and right support portions 46, 46 are erected on the upper surface of the unit body 14, and a backup roll 48 is rotatably attached in the left-right direction (y-axis direction) between them. There is. The backup roll 48 is driven by a roll motor 70.

As shown in FIGS. 1 and 2, a die 50, which is a coating portion for applying the coating liquid to the web W, is horizontally provided on the upper surface of the unit body 14 and in front of the backup roll 48. .. The die 50 can be moved in the front-rear direction (x-axis direction) to a coating position for applying the coating liquid to the web W held by the backup roll 48 and a retracted position when the coating is stopped. ing.

As shown in FIGS. 1 and 2, a pair of left and right first eccentric cams 52 and 52 are provided on the upper portions of the unit body 14 on both the left and right side surfaces. The first eccentric cam 52 has a disk shape, and the first cam shaft 54 is provided at a position deviated from the center of the disk. The first cam shaft 54 is rotatable by the first cam motor 56. The position where the first eccentric cam 52 is attached is the upper part of the unit body 14 and near the front wall of the unit body 14, and corresponds to the lifting recess 36 of the arm portion 32 protruding from the base 12. It is provided at the position where it is used.

As shown in FIG. 1, a second eccentric cam 58 is provided on both the left and right sides of the unit body 14, at the lower part of the unit body 14 and in the vicinity of the front part. The second eccentric cam 58 has a disk shape, and the second cam shaft 60 is located at a position deviated from the center of the disk. The second cam shaft 60 is rotated by the second cam motor 62. A part of the second eccentric cam 58 protrudes from the front surface of the unit body 14 and comes into contact with the end surface 30 of the wall body 16.

The pair of left and right support portions 46, 46 that rotatably support the backup roll 48 are provided with bearings 66 that rotatably support the pair of left and right roll rotation shafts 64 of the backup roll 48.

As shown in FIGS. 2 and 3, a rigid coupling device 68 is provided on the roll rotating shaft 64 protruding from one of the bearings 66. Further, a roll motor 70 for rotating the backup roll 48 and a reduction gear 72 for decelerating the rotation speed of the roll motor 70 are provided on the base 12. The drive shaft 74 protruding from the speed reducer 72 is arranged on the same axis as the roll rotation shaft 64, and a rigid coupling device 76 is provided at the tip thereof. A torque meter 78 is provided between the coupling device 76 and the coupling device 68. In the present embodiment, the roll motor 70 and the speed reducer 72 are combined to form a drive device.

(4) Electrical Configuration of Coating Device 10 Next, the electrical configuration of the coating device 10 will be described with reference to the block diagram of FIG.

A roll motor 70, a torque meter 78, a first cam motor 56, a second cam motor 62, and a lifting device are connected to the control unit 80 of the coating device 10.

(5) Relationship between Rotational Torque and Eccentricity An object of the present embodiment is to detect eccentricity between the roll rotation shaft 64 of the roll motor 70, the roll motor 70 which is a drive device, and the drive shaft 74 of the reduction gear 72. is there. Therefore, the inventor of the present application has experimented with what kind of phenomenon occurs when the drive shaft 74 and the roll rotation shaft 64 are eccentric, and pays attention to the rotation torque of the roll rotation shaft 64. Then, when the rotational torque of the drive shaft 74 was not within the reference rotational torque, it was discovered that the drive shaft 74 was eccentric. It was proved by the following experiment.

As described above, an experiment was conducted in which a torque meter 78 was provided between the roll rotation shaft 64 and the drive shaft 74, and the rotation torque of the roll rotation shaft 64 was detected by intentionally changing the eccentricity angle θ °. The experimental data are shown in FIGS. 11 to 15. In the graphs of FIGS. 11 to 15, the vertical axis is the rotational torque of the torque meter 78, the horizontal axis is the time (seconds), and the rotational speed of the drive shaft 74 is 100 rpm.

11 shows the case where θ = 0 ° in FIG. 3, FIG. 12 shows θ = 0.19 °, FIG. 13 shows θ = 0.28 °, FIG. 14 shows θ = 0.38 °, and FIG. 15 shows θ = 0. It is 47 °.

As is clear from the experimental results, the larger the eccentricity θ ° between the roll rotation shaft 64 and the drive shaft 74, the larger the rotational torque swings. However, when the eccentric angle θ ° becomes equal to or greater than the maximum twist angle of the torque meter 78, the amplitude exceeds the threshold value and measurement becomes impossible.

Based on this discovery, the inventor decided to set a reference torque value as a threshold value for the detected rotational torque so that the eccentricity angle θ ° does not deviate more than a predetermined angle. For example, if the reference torque value = 0.1 (Nm) as shown in FIG. 12, the eccentricity adjustment is not performed when the detected rotational torque is equal to or less than the reference torque value, and the eccentricity adjustment is performed when the detected rotational torque is larger than the reference torque value. And said. Next, the method of eccentricity adjustment will be described.

First, the roll motor 70 and the speed reducer 72 are completely fixed to the base 12, and the drive shaft 74 does not move in any direction. Further, it is assumed that the roll rotation shaft 64 does not move in the axial direction (y-axis direction). Therefore, in order to adjust the eccentricity angle θ °, it is necessary to move the roll rotation shaft 64 in the z-axis direction and the x-axis direction, respectively, so that the rotation torque is minimized.

Therefore, the control unit 80 moves the unit body 14 in the z-axis direction and adjusts the z-axis direction of the roll rotation axis 64 of the backup roll 48. In the z-axis direction, as shown in FIGS. 4 to 5, the control unit 80 rotates the first eccentric cam 52 mounted on the lifting recess 36 of the arm portion 32 by the first cam motor 56, and the maximum is increased. The unit body 14 is moved in the vertical direction (z-axis direction) within the range of L1 and the maximum L1 downward, and the rotation of the first eccentric cam 52 is feedback-controlled so as to be in the position where the rotational torque is the smallest.

Next, the control unit 80 moves the unit body 14 in the x-axis direction and adjusts the x-axis direction of the roll rotation axis 64 of the backup roll 48. In the x-axis direction, when the control unit 80 eccentrically rotates the second eccentric cam 58 that is in contact with the end face 30 by the second cam motor 62 and the first reference distance is L0, the end face 30 of the base 12 The unit body 14 is moved in the front-rear direction (x-axis direction) within the range of the maximum distance L0 + L2 and the minimum distance L0-L2, and the rotation of the second eccentric cam 58 is feedback-controlled so as to be in the position where the rotational torque is the smallest. ..

As a result, the eccentricity between the roll rotation shaft 64 and the drive shaft 74 can be reduced.

(6) Operating State of Coating Device 10 The operating state of the coating device 10 will be described with reference to FIGS. 1 to 3.

First, as shown in FIG. 1, the legs 15 of the base 12 are placed on a horizontal floor.

Next, as shown in FIGS. 2 and 3, the unit body 14 is moved to the mounting recess 28 by the moving device 44.

Next, as shown in FIG. 1, the pair of left and right arm portions 32 lift the first eccentric cam 52 of the unit body 14 mounted in the mounting recess 28 to a predetermined height in the z-axis direction. In this case, the second eccentric cam 58 is always in contact with the end surface 30 of the wall body 16.

Next, as shown in FIGS. 2 and 3, the drive shaft 74, the torque meter 78, and the roll rotation shaft 64 are connected by the coupling device 68 and the coupling device 76 on substantially the same axis.

Next, as shown in FIG. 3, the eccentric adjustment is performed by rotating the first eccentric cam 52 and the second eccentric cam 58, respectively, and performing feedback control so that the eccentric angle θ ° is within a predetermined angle.

Next, as shown in FIGS. 1 and 2, the web W is passed through the carry-in rolls 18, 20, 22, and 24 and bridged so as to be held by the backup roll 48, and is carried out from the carry-out roll 26 to the outside of the coating device 10. To be able to drive.

Next, as shown in FIG. 1, the dies 50 are arranged on the web W of the backup roll 48 at intervals of coating.

Next, as shown in FIGS. 1 and 2, the backup roll 48 is conveyed by the roll motor 70 at a predetermined transfer speed, and the coating liquid is applied to the surface of the web W from the die 50.

(7) Effect According to the present embodiment, the eccentric angle θ ° between the drive shaft 74 and the roll rotation shaft 64 can be detected from the rotation torque measured by the torque meter 78.

Further, when the device is installed, or after installation, the eccentric angle θ ° is detected periodically, and the unit body 14 is moved by the first eccentric cam 52 and the second eccentric cam 58 so that the eccentric angle is within a predetermined angle. By moving it, the eccentricity between the drive shaft 74 and the roll rotation shaft 64 at the time of installation or due to aging can be reduced.

Change example

In the above embodiment, the backup roll 48 has been described as the roll, but any roll that is rotated by a motor is not limited to the one used in the coating apparatus, and other rolls may be used.

Further, in the above embodiment, the die is used as the coating portion, but instead, a gravure coater or a reverse coater may be used in the vicinity of the backup roll 48.

Further, as the moving device 44 for moving the unit body 14, a hydraulic cylinder or other device may be used in addition to the rollers.

Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

10 ... coating device, 12 ... base, 14 ... unit body, 16 ... wall body, 28 ... mounting recess, 30 ... end face, 32 ... arm, 34 ... fulcrum, 36 ... lifting recess, 38 ... rotating shaft, 40 ... lifting device, 48 ... backup roll, 50 ... die, 52 ... first eccentric cam, 58. 2nd eccentric cam, 64 ... roll rotation shaft, 68 ... coupling device, 70 ... roll motor, 72 ... reduction device, 74 ... drive shaft, 76 ... coupling Device, 78 ... Torque meter, 80 ... Control unit

Claims (10)

Roll and
A drive device including a motor for rotating the roll, and
A connecting portion that connects the drive shaft of the drive device and the rotation shaft of the roll,
A torque meter provided at the connecting portion and measuring the rotational torque of the rotating shaft,
A control unit that determines that the drive shaft and the rotation shaft are eccentrically connected when the rotation torque detected by the torque meter is larger than the reference torque value.
Eccentricity detector with. Roll and
A drive device including a motor for rotating the roll, and
A connecting portion that connects the drive shaft of the drive device and the rotation shaft of the roll,
A torque meter provided at the connecting portion and measuring the rotational torque of the rotating shaft,
A moving portion that moves the roll in a direction orthogonal to the rotation axis,
When the rotational torque detected by the torque meter is larger than the reference torque value, it is determined that the drive shaft and the rotary shaft are eccentrically connected, and the detected rotational torque is within the reference torque value. , A control unit that moves the roll by the moving unit,
Eccentricity adjusting device having. When the direction along the rotation axis is the y-axis in the three-axis Cartesian coordinate system,
The moving part
A first moving portion that moves the roll in the x-axis direction,
A second moving portion that moves the roll in the z-axis direction,
The eccentricity adjusting device according to claim 2. A coating device having the eccentricity adjusting device according to claim 3.
Base and
The unit body attached to the base and
Have,
The unit body
With the roll
With the first moving part
With the second moving part
The coating part that applies the coating liquid to the web running on the roll, and
Have,
The base is provided with the driving device and the connecting portion.
Coating equipment. The first moving part is
A pair of left and right arms protruding from the base,
A lifting recess provided at the tip of the arm and
A pair of left and right first eccentric cams provided on the unit body and
A first cam motor provided on the unit body to rotate the first eccentric cam, and
Have,
The first eccentric cam is placed in the lifting recess, and the first cam motor rotates the first eccentric cam to move the unit body up and down along the z-axis.
The coating apparatus according to claim 4. It has a lifting device that rotates the tips of the pair of left and right arms in the vertical direction.
The coating apparatus according to claim 5. The second moving part is
A pair of left and right second eccentric cams provided on the unit body,
A second cam motor provided on the unit body to rotate the second eccentric cam, and
Have,
The second eccentric cam is brought into contact with a linear end face in the vertical direction of the base, and the second cam motor rotates the second eccentric cam to move the unit body in the front-rear direction along the x-axis direction. Move to
The coating apparatus according to claim 4. It has a moving means for moving the unit body to the base.
The coating apparatus according to claim 5. The coating part is a die,
The coating apparatus according to claim 5. The coating part is a gravure coater or a reverse coater.
The coating apparatus according to claim 5.

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