JPH0428430B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for correcting the gap between a back-up roll and a metering bar placed above the back-up roll in order to make the amount of coating agent applied to the material to be coated uniform. .

Conventionally, a device is known in which a material to be coated and a coating agent are supplied between a back-up roll and a metering bar to uniformly apply the coating agent to the material to be coated.

However, in order to keep the distance between the back-up roll and the metering bar constant, the spindle of the dial gauge supported on the machine is brought into contact with the metering bar, and the display is displayed on the dial gauge. The deviation from the reference interval is read, and based on this, the interval is corrected by manual operation.

With such a method, it is only possible to adjust an error of less than 1/100 mm. For example, when laminating many thin plates to obtain a flat laminated board, the coating material can be adjusted without a thickness error of 1/1000 mm. In addition, during work, the viscosity of the coating solution changes due to changes in temperature and humidity, or the coating solution is supplied between the back-up roll and the metering bar. The spacing constantly changes due to changes in the feeding speed of the material to be coated, but it has not been possible to automatically adjust the spacing in response to such changes.

The purpose of the present invention is to obtain a device that eliminates such inconveniences, and includes a metering bar that faces the top surface of a back-up roll that is rotatably supported on a machine base, and is provided at both ends of the metering bar on the machine base. a detecting means supported by an adjusting device to freely adjust the distance between the back-up roll and the back-up roll, and detecting an intermediate distance in the axial direction between the back-up roll and the metering bar; In a coating machine equipped with a fine adjustment means for finely adjusting the interval, an electric digital micrometer with a detection part facing above the metering bar is provided as the detection means, and the fine adjustment means is supported on a machine base. a reversible motor, a gear that rotates in conjunction with the reversible motor, and a forward/backward moving member that moves forward and backward with respect to the back-up roll in conjunction with the gear, and the metering bar is attached to the forward/backward moving member. The reversible motor is controlled by an electric signal corresponding to the deviation of the intermediate position of the metering bar from the reference interval detected by the electric digital micrometer, and finally The method is characterized in that the distance between the back-up roll and the metering bar is adjusted by moving the metering bar in one direction regardless of whether the distance is decreased or increased.

An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawing, 1 is a machine base, 2 is a back-up roll supported by the machine base 1 and rotatably provided, and 3 is a metering bar facing the top surface of the back-up roll 2. is supported at both ends by a spacing adjustment device 4, so that the spacing between it and the backup roll 2 can be freely adjusted.

To explain this in detail, the spacing adjustment device 4 includes a swinging lever 6 whose upper end is swingably supported on the machine base 1, a hydraulic piston cylinder 7 connected to its lower end, and a lower end of the swinging lever 6. The distance between the back-up roll 2 and the metering bar 3 is adjusted by the operation of the hydraulic piston cylinder 7, and the distance is adjusted by the rotation of the eccentric cam 8. Adjustments have been made.

In the drawings, reference numeral 9 indicates a belt-shaped material to be coated, such as a resin film, which is supplied through the gap between the back-up roll 2 and the metering bar 3, and 10 indicates a material between the back-up roll 2 and the metering bar 3. The supply parts 11 and 12 supply adhesive as a coating agent to the upper surface of the material 9 to be coated immediately before being introduced into the substrate, and the coating agent is applied to the upper surface of the material 9 through the space between the back-up roll 2 and the metering bar 3. This is a guide roll that guides the material 9 to be coated.

Up until now, there has been no particular difference from conventional coating machines.

In such a device, the present invention includes a back-up roll 2 and a metering bar 3, as shown in FIG.
An electric digital micrometer 13 is provided as a detection means for detecting the distance between the electric digital micrometer 13 and an adjustment means 14 that automatically finely adjusts the distance according to the distance detected by the electric digital micrometer 13.
This will be explained below.

That is, the adjusting means 14 includes a screw rod 1 as a forward/backward moving member inserted into a gear 16 that rotates in conjunction with a reversible motor 15 with a brake supported on the machine base 1.
7, the screw rod 17 supports the middle of the metering bar 3, and the electric digital micrometer 13 constantly detects changes in the distance between the backup roll 2 and the metering bar 3. When a change of 1/1000 mm from the reference value occurs, the control circuit 13c of the control section 13d controls the reversible motor 15 to correct this change in interval.

To explain this in more detail, the electric digital micrometer 13 includes a detection section 13a and a detection section 13a.
A control circuit section 1 that rotates the reversible motor 15 with a brake in forward and reverse directions by the output of an operational amplifier section 13b which extracts the value detected by the electric signal as an electric signal, compares it with a reference signal, and amplifies the value.
It consists of 3c.

In the illustrated example, a reversible motor with a brake similar to that described above is used as the motor for driving the eccentric cam 8, and an electric digital sensor is used as means for detecting the distance between the outer ends of the back-up roll 2 and the metering bar 3. Using a micrometer 24,
The distance between the outer ends of the back-up roll 2 and the metering bar 3 is automatically adjusted.

Next, to explain these adjustment operations, first, an electric digital micrometer 13 is placed between the back-up roll 2 and the metering bar 3 in the axial direction, that is, at both ends and at the center of the back-up roll 2 and the metering bar 3. measuring head (not shown)
Then, the position of the metering bar 3 with respect to the backup roll 2 is determined by the adjusting device 4, and in this state, the display section 1 of each electric digital micrometer 13 located at both ends and the center is adjusted.
Set the display of 3e to 0.

And each electric digital micrometer 13 is set at 1/1000 with respect to the reference position (first set position).
The operational amplifier 13b is set so that when a change in mm is detected, output signals can be obtained depending on the size of the interval with respect to the reference position.

In this case, for example, the electric digital micrometer 13 can be used to indicate that the distance has decreased by 1/1000 mm.
When detected, an output signal is generated at the first output terminal _t1 of the operational amplifier section 13b, and a relay connected to the output signal is generated at the first output terminal t1 of the operational amplifier section 13b.
Energize R ₁ . Then, the forward rotation switching circuit 13 of the reversible motor 15 constituting the control circuit section 13c
The contacts r ₁ -a and r ₁ -b interposed between the reverse switching circuit 13c-1 and the reverse switching circuit 13c-2 are switched. For this reason, a relay is inserted into the forward rotation switching circuit 13c-1.
R ₂ is energized and closes its contact r ₂ . Therefore, the relay _R3 is energized and closes its contact _r3 interposed in the normal rotation circuit of the reversible motor 15. Therefore, the reversible motor 15 rotates normally and moves the metering bar 3 in a direction that increases the interval.

Then, when the interval returns to the standard interval, the operational amplification section 13b
By losing output from and demagnetizing relay _R1 ,
Its contacts r ₁ -a, r ₁ -b switch to their original state, and relay R ₃ demagnetizes and opens its contacts r ₃ , so that the interval is in its reference state.

When the electric digital micrometer 13 detects that the distance has increased by 1/1000 mm, an output signal is generated at the second output terminal _t2 of the operational amplifier section 13b, and the relay _R4 connected thereto is energized. do.

Then, the contact _r4 intervening in the reverse rotation switching circuit 13c-2 of the reversible motor 15 constituting the control circuit 13c is closed. Therefore, the reverse switching circuit 1
3c-2 is energized and closes the relay contact _R5 interposed in the reversing circuit _of the reversible motor 15. Therefore, the reversible motor 15 rotates in reverse to move the metering bar 3 in a direction that reduces the distance. When the reference interval is restored, the output from the operational amplifier section 13b is lost, and as a result, relay _R4 is demagnetized and its relay contact _r4 switches to its original state, but relay _R5 has relay contact r The excitation state is maintained through the b contact r1 _- b of relay _R1 connected in _parallel with relay _R5 and the self-holding contact _r5 -b of relay R5.
Therefore, the reversible motor 15 continues to rotate,
Move until the distance decreases by 1/1000mm. This produces an output signal at the first output terminal t ₁ , energizes the relay R ₁ as described above, and closes the contact r ₁ as described above.
-a and _r1 -b, and the relay _R5 demagnetizes and opens its contact _r5 , so that the reversible motor 15 is rotated forward through the process described above, and when the distance is finally reduced, Adjust the interval by increasing the interval in the same way. Therefore, the distance between the gear 16 and the threaded rod 17 can be adjusted accurately without causing errors due to backlash.

In addition, Backup Prowl 2 and Metering Bar 3
The same can be said for adjusting the distance between the swing lever 6 and the eccentric cam 8 when adjusting the distance between the outer ends of the swing lever 6 and the eccentric cam 8. In the drawing, S ₁ and S ₂ are a forward rotation switching circuit 13c-1 and a reverse rotation switching circuit 13c-2, which are opened by a signal from the operational amplifier 13b when the electric digital micrometer 13 detects an abnormal increase or decrease in the interval. This is an intervening safety switch.

In the embodiment shown in FIGS. 1 to 3, the gear 16 is driven in conjunction with the reversible motor 15.
The metal ring bar 3 is attached to the lower end of the screw rod 17 that is screwed into the screw rod 17.
The screw rod 17 is moved up and down by the rotation of the reversible motor 15 to adjust the distance between the back-up roll 2 and the metering bar 3.

However, as shown in FIG.
On the rotating shaft 18 of the gear 16 that rotates in conjunction with the gear 16, an eccentric shaft portion 18a, which is slightly eccentric, for example, about 0.1 mm, with respect to the center of rotation of the rotating shaft 18 is provided as an advancing/retracting member. It is also possible to attach a ring 20 to the outer periphery of the metal ring 20 via a bearing ring 19, and to support the metering bar 3 at the lower end of the ring 20 via a joint 21 for adjusting the spacing so as to adjust the spacing.

In this case, even if the motor 15 continues to rotate due to, for example, a failure in the control circuit section 13c, the distance between the backup roll 2 and the metering bar 3 will be 0.2 mm in the case of 0.1 mm. Unchanging and safe.

In the drawings, reference numerals 22 and 23 indicate threaded rods at both ends of the joint 21, which are threaded in opposite directions.

As described above, according to the present invention, an electric digital micrometer with a detection part facing the metering bar is provided as a means for detecting the intermediate interval in the axial direction between the back-up roll and the metering bar, and the interval is The fine adjustment means for making fine adjustments is made up of a reversible motor supported on a machine base, a gear that rotates in conjunction with the reversible motor, and an advancing/retracting member that moves forward and backward with respect to the back-up roll in conjunction with the gear. The metering bar is configured such that the metering bar is supported at the middle in the axial direction, and the electric signal corresponding to the deviation of the middle position of the metering bar from the reference interval detected by the electric digital micrometer is used to control the metering bar. By controlling the reversing motor, the metering bar is finally moved in one direction regardless of whether the distance is decreased or increased, and the fine distance between the back-up roll and the metering bar is adjusted.
Fine adjustments to the spacing between the back-up roll and the metering bar can be made automatically every time an error occurs, and regardless of whether the spacing is decreased or increased, the final adjustment is to move it in one direction. This adjustment has the effect of eliminating errors such as backlash between the gears in the adjusting means, and making it possible to perform accurate adjustment.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention; Fig. 1 is a front view, Fig. 2 is a side view, Fig. 3 is an enlarged plan view of the main parts, Fig. 4 is a control system diagram, and Fig. 5 is a control system diagram. Electrical circuit FIG. 6 shows another embodiment of the regulating means. 1...machine, 2...backup roll, 3...
...Metering bar, 13...Electric digital micrometer, 14...Adjustment means, 15...Reversible motor with brake.

Claims (1)

[Claims] 1. A metering bar facing the top surface of the back-up roll rotatably supported on the machine base is provided at both ends on the machine base. Between this and the back-up roll supported by an adjustment device. In the coating machine, the coating machine is equipped with a detection means for detecting the intermediate distance in the axial direction between the back-up roll and the metering bar, and a fine adjustment means for finely adjusting the distance. An electric digital micrometer is provided with a detection portion facing on a ring bar, and the fine adjustment means is provided with a reversible motor supported on a machine base, a gear that rotates in conjunction with the reversible motor, and the gear. It consists of a moving member that moves forward and backward relative to the back-up roll in conjunction with the
The advancing/retracting member is provided to support the middle of the metering bar in the axial direction, and the electric signal corresponding to the deviation of the middle position of the metering bar from the reference interval detected by the electric digital micrometer is used to control the metering bar. Application characterized in that the distance between the back-up roll and the metering bar is adjusted by controlling a reversing motor to ultimately move the metering bar in one direction regardless of whether the distance is decreased or increased. During the machine = correction device.