JP2003159548A - Coating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method capable of eliminating clogging of clearances by a remote operation if spray clearances between an upper lip and a lower lip of a free jet-type feed nozzle are clogged with regard to a coating device. <P>SOLUTION: In the coating device having the free jet-type feed nozzle 3 spraying a coating solution 8 to a base material 1, a constitution is so made that there is provided an actuator 26a which is driven so as to allow a tip of at least one lip 20 out of a pair of lips 4, 20 forming the spray clearances 3, 4 of the coating solution 8 to disengage and contact a tip of another lip 4 opposite thereto. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus having a free jet type liquid supply device.

[0002]

2. Description of the Related Art In the paper manufacturing industry and the processing industry such as paper, the most widely used means for modifying the surface of a substrate (paper, film, etc.) is a coating process for applying a coating liquid to the substrate surface. As one of the forms of this coating process, there is one as shown in FIG. 10, for example. The coating process form shown in FIG.
The coating liquid 8 is directly applied to the surface (liquid transfer surface) 14 of the base material 1 which is guided and run by the backing roll 2 one by one by the free jet type liquid supply nozzle 3, and the surplus is scraped by the subsequent scraping blade 16. It is a coating method that scrapes off the coating liquid 8 and applies a predetermined amount of coating liquid.
It is operated near 0 mm / min.

Such a free jet type liquid supply nozzle 3
The most important point is 10 to 20 times the thickness of the coating liquid 8 after the scraping blade 16 (usually 150 to 20).
How to uniformly transfer the coating liquid 8 having a thickness of 0 μm) to the surface of the base material 1 in the width direction and the flow direction, and once this uniform transfer state is obtained, how long this It is whether to maintain the state.

Forming a uniform transfer state means
A tapered gap (an inlet gap δ1 and an outlet gap δ) formed by the upper lip 4 and the lower lip 5 of the nozzle 3.
The flow rate of the spray jet liquid 17 discharged through 2) is uniform in the width direction (preferably, the flow rate deviation in the width direction is ±
5% or less), and even without backflow (backflow from the jet landing point 18 to the upstream side in the traveling direction of the substrate 1) or stagnation of the coating liquid 8 at the jet landing point 18. It means that they are transferred while being stretched.

For this purpose, the spraying angle α, the distance ζ between the backing roll 2 and the tip of the lower lip 4 and the nozzle outlet gap δ depend on the coating speed, the physical properties of the base material 1, the characteristics of the coating liquid 8, and the like.
It is necessary to select 2 so as to have an optimum value, and to sufficiently adjust the gap δ2 with the push-pull bolt 12 so as to be uniform in the width direction. When the mist (spray) of the scraping liquid 15 at a high speed scraped off by the scraping blade 16 adheres to the vicinity of the tip of the lower lip 5 and is solidified and deposited, the flow of the spray jet liquid 17 is disturbed and the coating liquid 8 cannot be uniformly stretched and transferred. In this case, on the liquid transfer surface 14 of the base material 1, streaks extending in the running direction of the base material 1 are generated, or in severe cases, liquid cracking occurs, and the coated product at this time becomes a defective product. Will end up.

Therefore, in order to maintain the above-mentioned good coating state for a long time, the mist (spray) of the scraping liquid 15 does not adhere to the vicinity of the tip of the lower lip 5 and solidify, so that the jet landing point is prevented. Although the distance from 18 to the scraping blade 16 is kept moderate, and although not shown, cooling water is passed through the inside of the vicinity of the tips of the upper lip 4 and the lower lip 5 to condense the surface, thereby removing the above-mentioned scraping liquid mist. Measures have been taken to prevent adhesion and solidification.

Further, as a matter of course, foreign matters in the coating liquid 8 coming from the liquid supply line side of the coating liquid 8 are removed beforehand by a filter (not shown) to prevent clogging of the outlet nozzle gap δ2. Has also been done. Although the coating liquid 8 is jetted from the head body 19, the head body 19 is covered with the cooling jacket 6. Also, the head body 1
The lower lip 5, which is provided on the upper surface of the lower lip 9 so as to face the upper lip 4, has both a base portion and a tip portion fixed by lip fixing bolts 10 and 11. On the other hand, the base of the upper lip 4 mounted on the head main body 19 is fixed by the lip fixing bolt 9, but the tip end of the upper lip 4 is fixed to the tip end of the lower lip 5 by the constricted portion 13 formed in the middle portion. The push-pull bolt 12 adjusts the position of the tip of the push-pull bolt 12. Further, the scraping blade 16 is used for the coater head 7
Equipped at the tip of.

[0008]

However, the coating apparatus having the above-mentioned conventional free jet type liquid supply nozzle 3 has the following problems. That is, in order to obtain the uniform transfer surface 14 even if the coating speed increases, it is necessary to appropriately narrow the exit nozzle gap δ2.
As a result, the flow velocity of the sprayed jet liquid 17 can be increased, the landing energy on the base material 1 is increased, and a stable landing can be obtained.
The extension of 7 is alleviated.

For example, when the coating speed is 1000 m / min or less, the outlet nozzle gap δ2 of about 1.5 mm is sufficient, but when the coating speed is increased to 2000 m / min, the outlet nozzle gap δ2 is 1 mm. It is necessary to narrow down to the front and back to increase the discharge speed. In this way, narrowing the outlet side nozzle gap δ2 means that foreign matter mixed in the coating liquid flowing through the free jet type liquid supply nozzle 3 (such as coating liquid sticking residue) or paper that has entered the system when the paper runs out. This leads to an increase in the frequency of the fiber residue clogging the slit (blowout gap) between the upper lip 4 and the lower lip 5.

The foreign matter or fiber residue clogging the slit portion should be cleaned by lowering the coater head 7 and the liquid supply nozzle 3 during operation and inserting a film spatula between the upper lip 4 and the lower lip 5. Although it is possible to temporarily improve the clogging situation, it is not possible to completely remove the clogged foreign matter from the inside of the free jet liquid supply type nozzle 3, and the clogging reoccurs after tens of minutes to several hours. Will end up.

If clogging occurs again, spray jet liquid 1
7 turbulence, in the worst case spray liquid 1
The liquid crack of 7 is generated and it becomes impossible to operate. In that case,
Once the coating operation is stopped, the free jet liquid supply type nozzle 3
The coating liquid 8 is drained from the inside, and hot water is circulated instead of the coating liquid 8 to perform internal cleaning, but this may not be sufficient in some cases. In this case, the free jet liquid supply type nozzle 3
It is necessary to open both end flanges (not shown in Fig. 10) and completely remove internal foreign matters with high-pressure washing water from the high-pressure hose. At that time, a loss time of 30 minutes to 1 hour occurs. However, the operating efficiency will be greatly reduced.

The present invention was devised in view of the above-mentioned problems, and when clogging occurs in the slit portion (blowout gap) between the upper and lower lips of the free jet type liquid supply nozzle, the slit portion can be remotely operated by remote control. An object of the present invention is to provide a coating device capable of eliminating clogging.

[0013]

Therefore, the coating apparatus of the present invention is a coating apparatus having a free jet type liquid supply nozzle for spraying the coating solution onto a base material, and a gap for blowing the coating solution is used. Of the pair of lips forming the above-mentioned lip is provided with an actuator that drives the tip of at least one of the lips to come into contact with and separate from the tip of the other opposite lip.

It is preferable that a swing mechanism for swinging the tip of the one lip is connected to the actuator. The swinging mechanism abuts against the biasing means for biasing the one lip in a direction away from the other lip, and abuts against the back surface of the one lip so as to oppose the biasing force of the biasing means. It is preferable that the actuator includes a contact member that swings the one lip depending on the angle, and the actuator rotationally drives the contact member to adjust the phase angle of the contact member.

The swing mechanism includes a contact member that contacts the one lip in a direction away from the other lip and in a direction approaching the other lip and swings the one lip according to a phase angle. It is preferable that the actuator rotationally drive the contact member to adjust the phase angle of the contact member. Alternatively, the swinging mechanism includes a biasing unit that biases the one lip in a direction separating from the other lip.
An abutting member that abuts against the back surface of the one lip so as to face the biasing force of the biasing means and presses the one lip back surface according to the phase position to swing the one lip. It is preferable that the actuator moves the contact member to adjust the phase position of the contact member.

The urging means includes a constricted portion formed at an intermediate portion of the one lip to elastically deform the tip portion of the one lip with respect to the base portion, and the tip portion of the one lip naturally. In this state, it is preferable that the fixing means is configured to fix the base portion of the one lip so as to be separated from the tip portion of the other lip. The swing mechanism is
When the free jet type liquid supply nozzle is normally used, the angle of the one lip is set so that the gap between the pair of lips is narrowed toward the blowing side, and when the free jet type liquid supply nozzle is washed, the pair of lips is set. It is preferable to set the angle of the one lip so that the gap of (1) expands toward the blowing side.

It is preferable that the actuator is connected to a parallel movement mechanism for moving the one lip in parallel with the other lip in a direction in which the lip is moved toward and away from the other lip. The parallel moving mechanism guides the one lip to move in a direction in which the one lip separates from the other lip, and the one lip moves in a direction in which the one lip separates from the other lip. The width of the base material is provided with a guide member, a plurality of lip-side inclined surfaces that are arranged side by side in the width direction of the base material on the back surface of the one lip, and an opposing inclined surface that abuts each of the lip-side inclined surfaces. A lip pressing member extending in the same direction, and when the opposed inclined surface moves due to the lateral movement of the lip pressing member, the one lip is separated from and contacted with the other lip via the lip side inclined surface. It is preferably configured to move.

Further, the parallel moving mechanism sets the position of the one lip so that the gap between the pair of lips is narrowed during normal use of the free jet type liquid supply nozzle,
At the time of cleaning the free jet type liquid supply nozzle, it is preferable to set the position of the one lip so that the gap between the pair of lips widens. Further, when the free jet type liquid supply nozzle is normally washed, the coating liquid is sprayed at the operating liquid pressure, and the free jet type liquid supply nozzle is insufficiently washed at the operating liquid pressure. In particular, it is preferable to inject the coating liquid at an injection pressure higher than the operating liquid pressure.

It is preferable that an operating means for remotely operating the actuator from outside the traveling line of the substrate is provided.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Note that among the reference numerals described in the drawings referred to in the respective embodiments, FIG.
The same reference numerals denote the same items, and the description thereof will be partially simplified or omitted. [First Embodiment] A coating apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic side view showing a main configuration of the coating apparatus of the present embodiment. And
FIG. 2 shows a portion corresponding to the liquid ejection nozzle portion in the free jet type liquid supply nozzle 3 shown in FIG. 10, and FIG. 2 is a sectional view taken along the line AA of FIG.

As shown in FIG. 1, a plurality of bearings 23 are arranged in parallel with each other in the width direction at right angles to the flow of the base material 1 at the tip of the lower lip mounting side nozzle body 28. The eccentric through shaft 2 is inserted into the arcuate recess 23a of the bearing 23.
2 is rotatably supported. The eccentric through shaft 22 has a shaft portion pivotally supported by the bearing 23 (shown by hatching in FIG. 1, and has a point O ₁ as an axis center) 22a and a shaft portion of the axis center O ₁ . The eccentric shaft portions 22b, which are eccentric with respect to 22a, are provided alternately.

Then, as shown in FIG. 2, the eccentric through shaft 2
Reference numeral 2 indicates a clockwise direction and a counterclockwise direction from both shaft ends (from one shaft end when the liquid supply nozzle is narrow) by a rotary hydraulic actuator 26a supported by a mount 27a via gears 24a and 25a. It has a structure that is driven to rotate. This rotation amount is, as shown in FIG.
It is indicated by an eccentric rotation angle β from a reference line passing through the axis O ₁ of the eccentricity and the eccentric axis O ₂ having the eccentricity ε, and is usually within one rotation, but preferably set within 90 degrees.

As a result, when the shaft portion 22a around the center O _{1 is} rotated by the angle β, the eccentric shaft portion 22b is centered at the point O.
The eccentric direction of the eccentric shaft portion 22b can be adjusted by moving from the state of ₂ to the state of O ₃ . On the other hand, a lower portion of the lower lip 20 adjacent to the eccentric through shaft 22 is fixed to a lower lip mounting side nozzle body 28 by a fixing bolt (fixing means) 47. The lower lip 20 has a narrowed portion 21 that is a thin portion having a uniform width direction immediately above the fixed portion. By elastically deforming the narrowed portion 21, the lower lip 20 is centered around the narrowed portion 21.
The tip (upper part in FIG. 1) of the upper lip 4 can be swung so as to be brought into contact with or separated from the tip of the upper lip 4.

On the back surface of the lower lip 20, an eccentric through shaft 22 is provided.
The eccentric shaft portion 22b is in contact with the eccentric shaft portion 22b and is pressed by the eccentric shaft portion 22b so that the tip portion of the lower lip 20 approaches the tip portion of the upper lip 4. That is, the elastically deformable constricted portion 21 functions as a biasing means that biases the tip end portion of the lower lip 20 in the direction separating from the tip end portion of the upper lip 4, and the eccentric through shaft 22 (particularly the eccentric shaft thereof). The portion 22b) functions as a contact member that contacts the back surface of the lower lip 20 and swings the lower lip 20 according to the phase angle (eccentric rotation angle) thereof. The constricted portion 21 and the eccentric through shaft 22 constitute a swing mechanism for swinging the tip portion of the lower lip 20.

Therefore, when the eccentric through shaft 22 is rotated, the lower lip 20 is elastically deformed within the elastic restoring limit around the constricted portion 21, and the upper lip 4 and the lower lip 20 are rotated.
The gap at the base end portion formed between the upper lip 4 and the lower lip 20 is constant, but the gap at the tip end portion formed between the upper lip 4 and the lower lip 20 (blowing gap, slit) is δ3 to δ4.
A tapered gap (δ3 <δ1) that expands to (δ3 <δ4) and gradually narrows from the base end portion to the tip end portion has a tapered gap (δ4> δ) that gradually expands from the base end portion to the tip end portion.
It is changed to 1).

The side seal of the coating liquid 8 when the lower lip 20 is moved is performed by the side plate 30 (see FIG. 2). A controller (operating means) 90 for remotely operating the rotary hydraulic actuator 26a is provided outside the coating site (base material traveling line). Through the controller 90, the coating site (base material traveling) is provided. The rotary hydraulic actuator 26a can be remotely operated from the outside of the line) to open and close the gap between the upper and lower lips 4 and 20 (the gap for blowing the coating liquid).

The coating apparatus as the first embodiment of the present invention is configured as described above, and therefore operates as follows. The lip tip clearance δ3 during operation shown by the solid line in FIG.
Is realized when the eccentric rotation angle β after pressing by the eccentric through shaft 22 is 0 degree (that is, when the center of the eccentric shaft portion 22b of the eccentric through shaft 22 is at the point O ₂ ). At this time, the eccentric through shaft 22 supports the elastic deformation reaction force of the lower lip 20 and the hydraulic reaction force acting between the both lips 4, 20.

As the eccentric rotation angle β is rotated counterclockwise from the 0 ° position by the rotary hydraulic actuator 26a, the lower lip 20 tries to return from the elastically deformed state to the free state, and the elastic deformation amount corresponds to the eccentricity amount ε. When the amount is less than the amount, the eccentric shaft side face of the eccentric through shaft 22 and the side face of the lower lip 20 have a gap therebetween to form the opened tip gap δ4,
On the other hand, when the amount of elastic deformation is greater than the amount of eccentricity ε, the tip clearance δ4 after opening is formed in a state where the eccentric shaft side surface of the eccentric through shaft 22 and the side surface of the lower lip 20 are in contact with each other without a gap.

Here, the tip clearance δ4 after opening is 3-5.
The shape of the constricted portion 21 is determined so that the eccentricity amount ε and the initial shape and the restoring property of the lower lip 20 at the time of initial assembly can be given so as to be about mm. Such a gap between the upper and lower lips 4, 20 (lip gap,
The opening / closing operation of the blowout gap) can be performed at any time by remotely operating the rotary hydraulic actuator 26a.

Therefore, if there is a blockage between the lips 4 or 20 or a coating failure occurs, the lower lip 20 is swung to a virtual position 20 'at this point to open the lip gap to δ4 and the coating liquid. It is possible to discharge the foreign matter which has become a coating obstacle to the outside of the free jet liquid supply nozzle 3 by blowing out 8. That is, when the lip gap is opened to δ4, the coating liquid 8 is allowed to flow around the foreign matter that has been the cause of blockage or coating failure, and the foreign matter is discharged by the force of the flow of the coating liquid 8. It will come to be. Generally, at least the gap δ4 between the upper and lower lips is several meters
By opening to about m (larger than the gap δ1 at the base end portion), foreign matter clogged in the lip gap (blowing gap) can be removed by the momentum of the coating liquid even during operation. Of course, after opening the lip gap to δ4 for a predetermined time (which is considered to be sufficient within a few seconds), the lip gap is closed again to the normal value δ1.

Further, the gap δ4 at the front end is replaced with the gap δ1 at the base end.
It is considered that the larger size is also effective for removing the foreign matter clogging the lip gap. Such opening of the lip gap may be performed with the free jet liquid supply nozzle 3 left in the operating position, or with the free jet liquid supply nozzle 3 being lowered from the operating position by about 100 mm. In the former case, the opening operation of the lip gap and the subsequent closing operation can be performed in a shorter time, and in the latter case, the splash base material of the coating liquid 8 generated with the opening of the lip gap. It is easy to reduce the effect on 2.

In this way, by simply opening the lip gap to δ4 by remote control, the lip gap of the nozzle 3 can be easily and extremely shortened by the coating liquid 8 itself flowing at high speed between the upper and lower lips 4,20. It can be washed (self-cleaning), and it is not necessary to stop the traveling of the base material 2. Of course, when cleaning, defective products are generated on the running base material, but this is a slight one, and there is a great merit in that it does not reduce the operating efficiency, and the free jet liquid supply nozzle 3 is good without reducing the production efficiency. It is possible to maintain a stable injection state.

Particularly, in this embodiment, since only the tip portion of the lower lip 20 is opened and closed, the driving load on the actuator can be relatively reduced although it depends on the elastic force of the constricted portion 21. The amount and speed of the coating liquid 8 can be generally adjusted, and as a method of enhancing the cleaning effect, the pressure of the liquid to be sprayed can be made higher than the normal hydraulic pressure (operating liquid pressure) during cleaning, or It is also effective to increase the blowing speed.

Further, a sensor for detecting the quality of coating (presence or absence of streaks, etc.) is installed in the downstream portion of the coating device (a technique which has been conventionally used), and from this sensor information, the occurrence of a defect in the lip gap is detected. It may be configured such that the judgment is made at the initial stage and the lip gap is automatically cleaned by opening the lip gap. That is, the detection means for detecting the quality of the coating and the judgment means for judging the occurrence of the defect of the lip gap from the detection information are provided, and when the judgment means judges the occurrence of the defect, the controller 90 causes the rotary hydraulic actuator 26a. May be operated to open the lip gap to δ4 for a predetermined time, as an automatic control system.

[Second Embodiment] A coating apparatus according to a second embodiment of the present invention will be described with reference to FIGS. 3 to 5. FIG. 3 is a schematic view showing the main configuration of the coating apparatus of the present embodiment. FIG. 11 is a schematic side view showing a portion corresponding to the liquid ejection nozzle portion of the free jet type liquid supply nozzle 3 shown in FIG. 10, FIG. 4 is an enlarged view of a main part of FIG. 3, and FIG. FIG. 6 is a sectional view taken along arrow B.

As shown in FIGS. 3 to 5, in this embodiment, a plurality of bearings 41 are provided at the tip of the lower lip mounting side nozzle body 39 in the width direction at right angles to the flow of the base material 1. They are fixed side by side. An oval elongated hole 43 is formed in the bearing 41 (shown by a thick solid line in FIG. 3), and an eccentric through shaft 34 is formed in an arcuate recess at the bottom of the oval elongated hole 43.
Is rotatably supported.

The eccentric through shaft 34 includes a shaft portion pivotally supported by the bearing 41 (shown by hatching in FIGS. 3 and 4 and having a point O ₄ as an axial center) 34a, and a shaft. Shaft 3 of heart O ₄
The eccentric shaft portions 34b, which are eccentric with respect to 4a, are provided alternately. On the other hand, the lower lip 35 adjacent to the eccentric through shaft 34 has a lower portion fixed with a fixing bolt (fixing means) 36.
Is fixed to the nozzle body 39 on the lower lip mounting side. A constricted portion 40, which is a thin portion having a uniform width direction, is formed immediately above the fixed portion of the lower lip 35, and the constricted portion 40 is centered on the constricted portion 40 within the elastically allowable deformation of the constricted portion 40.
The tip of the can swings in a direction in which it separates from and contacts the upper lip 4.

A plurality of lip-side bearings 42 having oval elongated holes 44 are fixedly arranged on the upper portion of the constricted portion 40 in the width direction. The lip-side bearing 42 is arranged so as to enter between the bearings 41 (see FIG. 5), and the eccentric shaft portion 3 of the eccentric through shaft 34 is disposed in the oval slot 44.
4b is rotatably engaged. Therefore, the bearing 4
1, 42 are engaged by the eccentric through shaft 34.

The oval long hole 43 of the bearing 41 and the oval long hole 44 of the lip side bearing 42 are formed to have the same shape and size, and the long and short diameters of the long holes 43 and 44 are the same. Is set to be equal to or more than the eccentric amount of the eccentric through shaft 34 (the eccentric amount of the eccentric shaft portion 34b with respect to the shaft portion 34a) τ. The oval holes 43 formed on the bearing 41 side and the oval holes 44 formed on the bearing 42 side are designed to be completely in the same position.

In order to assemble the bearings 41, 42 and the eccentric through shaft 34 into the engaged state, these oval elongated holes 43 and oval elongated holes 44 are completely at the same position (in FIG. 3) at the time of initial installation. As shown by the thick solid line). At this time, while the shaft portion 34a (axis center O ₄ ) of the eccentric through shaft 34 is located below the oval elongated hole 43, the eccentric through shaft 3
Since the eccentric shaft portion 34b of No. 4 is eccentric, the oval long hole 44
It is located above (axial center O ₅ ).

After the assembly, the eccentric through shaft 34 is attached to the shaft portion 3.
When rotated around 4a, the eccentric shaft portion 34b moves from the inside of the oblong elongated hole 43 to the outside as shown by the thin solid line and the two-dot chain line in FIG. As shown in the thin solid line and the chain double-dashed line in FIG. 3, the matching oval holes 44 are displaced from the oval holes 43, and the lower lip 35 is moved in the direction of separating from and contacting the upper lip 4. You can do it.

Here, in order to enable the eccentric through shaft 34 to be installed in the bearing 41 and the bearing 42, the pushing side rotation amount η1 of the eccentric through shaft 34 from the initial installed state (see FIG. 4).
(See also) can be freely set depending on how many mm the lip tip is set at the time of initial installation. The lip tip gap δ6 after opening can also be changed within the elastically allowable deformation of the necked portion 40.

A guide screw 38 is provided on each of the bearings 41 so as to come into contact with the shaft portion 34a of the eccentric through shaft 34, and the guide screw 38 allows the eccentric through shaft 34 within the elongated hole 43. The shaft portion 34a can rotate smoothly without backlash without changing the axial center position. Therefore, the eccentric through shaft 34 (in particular, the eccentric shaft portion 34b) is
It functions as a contact member that contacts the lower lip 35 in a direction away from the upper lip 4 and in a direction approaching the upper lip 4, and swings the lower lip 35 around the constricted portion 40 in accordance with the phase angle (rotation amount). It is like this. The eccentric through shaft 34 and the constricted portion 40 form a swing mechanism.

On the eccentric through shaft 34, as shown in FIG. 5, a rotary hydraulic actuator supported by mounting bases 27b from both shaft ends (from one shaft end when the liquid supply nozzle is narrow). 26b has a structure in which it is rotationally driven in a clockwise direction and a counterclockwise direction via gears 24b and 25b. As a result, in order to create the lip tip gap δ5 during operation, as shown in FIG. 4, the eccentric through shaft 34 is pressed from the initial installation (the eccentric direction faces the longitudinal direction of the oval slot 43). The eccentric shaft portion 3 of the eccentric through shaft 34 is rotated clockwise by the side rotation amount η1.
4b may be maintained so that the center position is at the point O ₆ . The lip tip gap δ5 during operation is smaller than the lip base end gap δ1.

The pressing side rotation amount η1 indicates the amount of clockwise movement of the eccentric shaft portion 34b of the eccentric through shaft 34 from the time of initial installation, as an angle about the shaft portion 34a of the eccentric through shaft 34. Here, since the axis of the eccentric shaft portion 34b is located at the point O ₅ at the time of initial installation and moves to the point O ₆ in the state where the lip tip clearance δ5 is created during operation, the pressing side rotation amount η1 is the angle O _5. Equivalent to O ₄ O ₆ .

On the other hand, in order to create the lip tip gap δ6 at the time of opening, as shown in FIG. 4, the eccentric through shaft 34 is rotated counterclockwise by the opening side rotation amount η2 from the time of initial installation, and the eccentric through shaft 34 is rotated. The eccentric shaft portion 34b of the shaft 34 may be held in this state with the center position of the shaft 34 at the point O ₇ . The lip tip gap δ6 when opened is larger than the lip base gap δ1.

Further, the opening side rotation amount η2 indicates the amount of counterclockwise movement of the eccentric through shaft 34 from the initial installation of the eccentric through shaft 34 as an angle around the shaft portion 34a of the eccentric through shaft 34. but, here, the axis of the eccentric shaft portion 34b is shifted to the point O ₇ is in a state to create a lip tip clearance δ6 during opening located at the initial incorporation into the point O _5, open side rotation amount η2 angle O Equivalent to ₅ O ₄ O ₇ .

Since the gap at the base end portion formed between the upper lip 4 and the lower lip 35 is constant at δ1, when the eccentric through shaft 34 is rotated clockwise by the pressing side rotation amount η1, the lower lip is rotated. 35 swings within the elastic limit of the constricted portion 40 around the constricted portion 40, the tip of the lower lip 35 approaches the tip of the upper lip 4 up to a gap (blowing gap) δ5, and the base end portion A tapered gap (δ5 <δ1) is formed which gradually narrows from the end to the tip. On the other hand, when the eccentric through shaft 34 is rotated counterclockwise by the opening side rotation amount η2, the lower lip 35 swings within the elastic limit of the constricted portion 40 around the constricted portion 40, and the lower lip 35 is rotated. Is separated from the tip of the upper lip 4 to a gap δ6 and gradually expands from the base end toward the tip (δ6> δ).
1) will be formed.

The side plate 46 (see FIG. 5) seals the side surface of the coating liquid 8 when the lower lip 35 moves. A controller (operating unit) 90 for remotely operating the rotary hydraulic actuator 26b is provided outside the coating site (base material traveling line), and the coating site (base material traveling) is provided through the controller 90. The rotary hydraulic actuator 26b can be remotely operated from the outside of the line) to open and close the gap between the upper and lower lips 4, 35 (spout for spraying the coating liquid).

The coating apparatus as the second embodiment of the present invention is configured as described above, and therefore operates as follows. The lip tip gap δ5 during operation shown by the solid lines in FIGS. 3 and 4 is realized by holding the rotation angle of η1 which is the pressing side rotation amount of the eccentric through shaft 34. At this time, the eccentric through shaft 34 supports the elastic deformation reaction force of the lower lip 35 and the hydraulic reaction force acting between the both lips 4, 35.

As the eccentric rotation angle η is rotated counterclockwise by the rotary hydraulic actuator 26b, the lower lip 3
5 returns to a natural state in which elastic deformation is reduced, and further rotates to the open side rotation amount η2 while giving elastic deformation on the tension side (see virtual position 35 ′) to form the open end gap δ6. . In this structure, since the eccentric through shaft 34 effectively acts on the bearing 42 on both the push side and the pull side, the eccentric amount τ, the free shape of the lower lip 35 at the time of initial assembly and the constricted portion 40 that governs the restoring property are optimized. Therefore, the lip opening amount δ is larger than that shown in the first embodiment.
6 can be set large, and the lip opening amount δ6 can be selected in the range of 3 to 8 mm, for example.

Of course, as in the first embodiment, the rotary hydraulic actuator 26b is operated remotely to open and close the gap (lip gap, blowing gap) between the upper and lower lips 4, 35. Can be done at any time. Therefore, if there is a blockage between the lips 4 and 35 or a coating failure occurs, the lip gap is set to δ6 at this point.
It is possible to discharge the foreign matter having a coating failure to the outside of the free jet liquid supply nozzle 3 by opening it to the outside and blowing out the coating liquid 8.

That is, when the lip gap is opened to δ6, the coating liquid 8 is allowed to flow around the foreign substance that has been the cause of the blockage or coating failure, and the foreign substance is generated by the force of the flow of the coating liquid 8. Will be discharged. Generally, a gap δ6 of at least the tip between the upper and lower lips is several meters.
By opening to about m (larger than the gap δ1 at the base end portion), foreign matter clogging the lip gap can be removed by the momentum of the coating liquid even during operation. Of course, the lip gap should be set to δ6
After the opening, the lip gap is closed again to the normal value δ1.

Such opening of the lip gap may be performed with the free jet liquid supply nozzle 3 left in the operating position, or with the free jet liquid supply nozzle 3 lowered from the operating position by about 100 mm. Is also good. In the former case, the opening operation of the lip gap and the subsequent closing operation can be performed in a shorter time, and in the latter case, the splash base material of the coating liquid 8 generated with the opening of the lip gap. It is easy to reduce the effect on 2.

In this way, by simply opening the lip gap to δ6 by remote control, the lip gap of the nozzle 3 can be easily and extremely shortened by the coating liquid 8 itself flowing at high speed between the upper and lower lips 4, 35. It can be washed (self-cleaning), and it is not necessary to stop the traveling of the base material 2. Of course, when cleaning, defective products are generated on the running base material, but this is a slight one, and there is a great merit in that it does not reduce the operating efficiency, and the free jet liquid supply nozzle 3 is good without reducing the production efficiency. It is possible to maintain a stable injection state.

In particular, also in this embodiment, since only the tip portion of the lower lip 35 is opened and closed, the driving load on the actuator can be relatively reduced although it depends on the elastic force of the constricted portion 40. It should be noted that the amount and speed of the coating liquid 8 blown out can generally be adjusted, and as a method of enhancing the cleaning effect, it is also effective to increase the blowing pressure, the amount and speed of blowout at the time of cleaning as compared with the normal time.

Further, as in the first embodiment, a sensor for detecting the quality of coating (presence or absence of streaks etc.) is installed in the downstream portion of the coating device (a technique used conventionally), and this sensor information is used. Therefore, it may be configured such that the occurrence of the defect in the lip gap is determined in the initial stage and the lip gap is automatically cleaned by opening the lip gap. That is, a detection unit that detects the quality of the coating and a determination unit that determines the occurrence of a defect in the lip gap from this detection information are provided, and if the determination unit determines that a defect has occurred, the controller 90 causes the rotary hydraulic actuator 26b. May be operated to open the lip gap to δ6 for a predetermined time, as an automatic control system.

[Third Embodiment] A coating apparatus according to a third embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is a schematic view showing the main structure of the coating apparatus of the present embodiment. 11 is a schematic side view showing a portion corresponding to the liquid ejection nozzle portion of the free jet type liquid supply nozzle 3 shown in FIG. 10, and FIG. 7 is a cross-sectional view taken along the line CC of FIG.

As shown in FIGS. 6 and 7, in this embodiment, a bar guide groove 63 is provided in the width direction at right angles to the flow of the base material 1 at the tip of the lower lip mounting side nozzle body 50. In the bar guide groove 63, a single tapered bar 55 is provided so as to be movable along this groove.
The tapered bar 55 is provided with a plurality of tapers 54 in the width direction.

On the other hand, the lower lip 51 provided so as to be adjacent to the tapered bar 55 has a lower portion fixed by a fixing bolt (fixing means) 48 to the lower lip mounting side nozzle body 50.
A narrowed portion 52, which is a thin portion having a uniform width direction, is formed immediately above the fixed portion. By elastically deforming the constricted portion 52, it is possible to swing about the constricted portion 52 so that the tip end portion (upper part in FIG. 6) of the lower lip 51 comes in contact with and separates from the tip end portion of the upper lip 4. . Here, the tip of the lower lip 51 is separated from the tip of the upper lip 4 by a required amount unless an external force is applied.

Tapered bar 55 on the back surface of the lower lip 51
A plurality of tapers 53 are formed in a portion adjacent to the above, and each taper 53 on the lip side is engaged with a corresponding taper 54 of the tapered bar 55. Then, the taper 54 of the tapered bar 55 presses the taper 53 on the lip side, so that the lower lip 51 is elastically deformed at the constricted portion 52 and the tip portion of the lower lip 51 approaches the tip portion of the upper lip 4. It has become.

When the tapered bar 55 moves to one side (left side in FIG. 7) along the bar guide groove 63, the taper 54 of the tapered bar 55 presses the taper 53 on the lip side and ejects this taper 53. The tip of the lower lip 51 is brought closer to the tip of the upper lip 4. Conversely, the tapered bar 55 extends along the bar guide groove 63 on the other side (see FIG.
Moving to the middle right), taper 5 of tapered bar 55
4 weakens the pressure of the taper 53 on the lip side, and the lower lip 5
The tip of the first lip 1 is separated from the tip of the upper lip 4.

Therefore, the elastically deformable neck 52 is formed.
Serves as a biasing means for biasing the tip portion of the lower lip 51 in a direction separating from the tip portion of the upper lip 4, and the tapered bar 55 (particularly its taper 54) serves as a biasing force of the biasing means. The lower lip 51 is abutted on the back surface (taper 53) of the lower lip 51 so as to face the lower lip 51, and the back surface (taper 53) of the lower lip 51 is pressed according to the phase position (position in the direction along the bar guide groove 63). Functioning as an abutting member for rocking, the constricted portion 52 and the tapered bar 55 form the lower lip 5.
It functions as a swinging mechanism that swings the tip of the first lip 1 away from the tip of the upper lip 4.

As an actuator for moving the tapered bar 55 along the bar guide groove 63, a hydraulic cylinder 56 is provided as shown in FIG. The hydraulic cylinders 56 are provided at both ends of the tapered bar 55, and press each end of the tapered bar 55 via levers 57. Here, the hydraulic cylinder 56 is supported by a mounting bracket 59 mounted on the liquid supply pipe 62, and a hydraulic switching control system in which the ends of the tapered bar 55 are interlocked to operate. Cage, tapered bar 5
When the hydraulic cylinder 56 on one end side of No. 5 extends, the hydraulic cylinder 56 on the other end side retracts to move the tapered bar 55.

Although the lower lip 51 moves when the tapered bar 55 moves, the side plate 60 seals the side surface of the coating liquid 8 when the lower lip 51 moves. A controller (operating means) 90 for remotely operating the hydraulic cylinder 56 is provided outside the coating site (base material traveling line).
Through this, the hydraulic cylinder 56 can be remotely operated from outside the coating site (base material running line) to open and close the gap between the upper and lower lips 4, 51 (spray gap for coating liquid). There is.

The coating apparatus as the third embodiment of the present invention is configured as described above, and therefore operates as follows. For example, from the state of the open lip tip gap δ8 (δ8> δ1) shown by the two-dot chain line in FIG. 6 to the operating lip tip gap δ7 (δ7 <δ1) shown by the solid line in FIG.
To achieve this, as shown in FIG.
Should be moved to the left by the movement stroke amount S1 from the position indicated by the two-dot chain line to the position indicated by the solid line. Thereby, the bar side taper 54 is finally pushed in such a manner that the bar side taper 54 and the lip side taper 53 are aligned with each other in the tapered surface. At this time, the bar 55 supports the elastic deformation reaction force of the lower lip 51 and the hydraulic reaction force acting between the both lips 4, 51.

On the contrary, as shown by the solid line in FIG. 6, from the state of the lip tip gap δ7 at the time of operation of the lower lip 51 which is installed by giving the initial elastic strain, as shown by the two-dot chain line in FIG. , The lower lip 51 is set to the virtual position 51 ′ to create the lip tip gap δ8 when opened, the hydraulic cylinder 5
6 is operated to move the tapered bar 55 rightward by the movement stroke amount S1 shown in FIG.

The tapered bar 5 is moved by the hydraulic cylinder 56.
When 5 is returned in the opposite direction, the lower lip 51 returns to a free state in which elastic deformation is reduced, and when the movement stroke amount S1 is larger than the elastic movement amount given to the lower lip 51, the taper 53, 54 is tapered. The engagement is separated, and the front end gap δ8 after opening is formed with a gap. In this structure, the movement amount S of the tapered bar 55 that determines the characteristics of pushing and pulling
1. The opening amount δ8 equivalent to that in the case of the first embodiment is obtained by optimizing the constricted portion 52 that controls the gradient of the taper 53, 54, the initial shape of the lower lip 51 at the time of initial installation, and the restoring property. It is possible to select, for example, in the range of 3 to 5 mm.

Of course, as in the first and second embodiments, the hydraulic cylinder 56 is used to open and close the gaps (lip gaps, blowing gaps) between the top and bottom lips 4, 51.
It can be carried out at any time by operating remotely. Therefore, if there is a blockage between the lips 4 or 51 or a coating failure occurs, the lip gap is opened to δ8 and the coating solution 8 is blown out at this point to free-jet the foreign matter that has become the coating failure. The liquid can be discharged to the outside of the nozzle 3.

That is, when the lip gap is opened to δ8, the coating liquid 8 is allowed to flow around the foreign matter that has been the cause of blockage or coating failure, and the foreign matter is generated by the momentum of the flow of the coating liquid 8. Will be discharged. Generally, a gap δ8 of at least the tip between the upper and lower lips is several meters.
By opening to about m (larger than the gap δ1 at the base end portion), foreign matter clogging the lip gap can be removed by the momentum of the coating liquid even during operation. Of course, the lip gap should be δ8 for a predetermined time
After the opening, the lip gap is closed again to the normal value δ1.

Such opening of the lip gap may be carried out with the free jet liquid supply nozzle 3 left in the operating position, or with the free jet liquid supply nozzle 3 being lowered from the operating position by about 100 mm. Is also good. In the former case, the opening operation of the lip gap and the subsequent closing operation can be performed in a shorter time, and in the latter case, the splash base material of the coating liquid 8 generated with the opening of the lip gap. It is easy to reduce the effect on 2.

In this way, by simply opening the lip gap to δ8 by remote control, the lip gap of the nozzle 3 can be easily and extremely shortened by the coating liquid 8 itself flowing at high speed between the upper and lower lips 4,51. It can be washed (self-cleaning), and it is not necessary to stop the traveling of the base material 2. Of course, when cleaning, defective products are generated on the running base material, but this is a slight one, and there is a great merit in that it does not reduce the operating efficiency, and the free jet liquid supply nozzle 3 is good without reducing the production efficiency. It is possible to maintain a stable injection state.

In particular, also in this embodiment, since only the tip portion of the lower lip 51 is opened and closed, the driving load on the actuator can be relatively reduced although it depends on the elastic force of the constricted portion 52. It should be noted that the amount and speed of the coating liquid 8 blown out can generally be adjusted, and as a method of enhancing the cleaning effect, it is also effective to increase the blowing pressure, the amount and speed of blowout at the time of cleaning as compared with the normal time.

Further, as in the first and second embodiments, a sensor for detecting the quality of coating (presence or absence of streaks or the like) is installed in the downstream portion of the coating device (technique used conventionally), It may be configured such that the occurrence of a defect in the lip gap is determined from the sensor information at an initial stage, and the lip gap is automatically cleaned by opening the lip gap. That is, the detection means for detecting the quality of the coating and the determination means for determining the occurrence of the defect in the lip gap based on the detection information are provided, and when the determination means determines the occurrence of the defect, the controller 90 operates the hydraulic cylinder 56. The automatic control system may be configured so that the lip gap is opened to δ8 for a predetermined time.

[Fourth Embodiment] A coating apparatus according to a third embodiment of the present invention will be described with reference to FIGS. 8 and 9. FIG. 8 is a schematic view showing the main structure of the coating apparatus of the present embodiment. 10 is a schematic side view showing a portion corresponding to the liquid blowing nozzle portion in the free jet type liquid supply nozzle 3 shown in FIG. 10, and FIG. 9 is a sectional view taken along the line D-D of FIG. 8.

As shown in FIGS. 8 and 9, in this embodiment, two bar guide grooves 78 are formed at the tip of the lower lip mounting side nozzle body 65 in the width direction at right angles to the flow of the base material 1.
Is provided. Inside each of these bar guide grooves 78, one tapered bar 69 is provided so as to be movable along the bar guide groove 78. Tapered bar 6
A plurality of tapers 68 are provided in the width direction 9.

On the other hand, the lower lip 66 provided so as to be adjacent to each one of the tapered bars 69 is engaged with the lower lip mounting side nozzle main body 65 at the upper and lower guide surfaces 79. The biasing force of the tension spring (biasing means) 74 held by the spring receiving bolt and the rotation-preventing nut 75 and the recess formed in the attachment side nozzle body 65 causes the gap formed by the upper lip 4 and the lower lip 66. Always acts on the lower lip 66 in the direction in which the lower lip 66 extends (the direction in which the lower lip 66 separates from and contacts the upper lip 4).

Each bar side taper (opposed inclined surface) 68 formed on each tapered bar 69 is in contact with each lip side taper (lip side inclined surface) 67 formed on the back surface of the lower lip 66, Taper bar 69 and bar guide groove 78
When the taper 68 is moved away along with the taper 68, each tapered bar 69 functions as a pressing member to press the lower lip 66 and drive the lower lip 66 to approach the upper lip 4, Taper 67 by taper 68
When the ejection movement of the lower lip 66 is weakened, the lower lip 66 is separated from the upper lip 4 by the biasing force of the tension spring (biasing means) 74.

Hydraulic cylinders 70 are provided at both ends of each tapered bar 69 as actuators for moving each tapered bar 69 along the bar guide groove 78. The hydraulic cylinder 70 is supported by a mounting bracket 73 attached to the liquid supply pipe 62 and is directly connected to each tapered bar 69 via a pressing lever 71. Has a hydraulic switching control system that works in tandem.

Each tapered bar 69 has a hydraulic cylinder 70.
Are simultaneously driven by the same amount, and the bar side taper (opposed inclined surface) 68 uniformly presses the opposed lip side taper (lip side inclined surface) 67 to move the lower lip 66 in parallel. The pair of tapered bars 69, the bar-side taper 68 and the lip-side taper 67 that come into contact with each other constitute a parallel movement mechanism.

That is, in both tapered bars 69 that move in synchronization with each other by the same amount, the lower lip 66 has the upper lip 4
The width of the base material 1 has a bar-side taper (opposed inclined surface) 68 that functions as a guide member that guides it to move toward and away from the lip-side taper (lip-side inclined surface) 67. Each tapered bar 69 extending in the direction functions as a lip pressing member, and each tapered bar 69 moves laterally (in this case, moves in the longitudinal direction).
By adjusting the pressing of the lower lip 66 via the contact surface between the bar-side taper 68 and the lip-side taper 67, the lower lip 66 is moved toward and away from the upper lip 4.

A controller (operating means) 90 for remotely operating the hydraulic cylinder 70 is provided outside the coating site (base material running line). Remotely operate the hydraulic cylinder 70 from outside the traveling line) to move the upper and lower lips 4,66
The opening (opening gap of the coating liquid) at the tip of the can be opened and closed.

The coating apparatus as the fourth embodiment of the present invention is configured as described above, and therefore operates as follows. That is, as shown by the solid line in FIG. 8, in order to set the lip tip clearance δ9 during operation, the tapered bar 69 may be moved leftward by the hydraulic cylinder 70 by a required moving stroke amount. For example, in order to set from the position (virtual position) 66 ′ of the lower lip 66 at the time of opening shown by the two-dot chain line in FIG. 8 to the position at the time of operation shown by the solid line, the tapered bar 6
9 is moved to the left by the movement stroke amount S2 from the position indicated by the chain double-dashed line in FIG. 9 to the position indicated by the solid line, the bar side taper 68 is realized by pushing the lip side taper 67.

On the other hand, when the tapered bar 69 is returned in the opposite direction by the hydraulic cylinder 70, the lower lip 66 is pushed back by the tension spring 74 while being engaged by the surfaces of the tapers 67 and 68, and the tip clearance after opening is increased. δ10 is formed. For example, from the operating position shown by the solid line in FIG.
6'and in order to create the lip tip gap δ10 when opened, the tapered bar 69 is moved to the right by the movement stroke amount S2 shown in FIG. 7, and the lower lip is pulled by the pulling spring 74. It may be pulled back from the lip tip gap δ9 when 66 is operated. When the lower lip 66 moves, the side surface of the coating liquid 8 is sealed by the side plate 77.
Done by

In the present embodiment, since the lower lip does not have the constricted portion as in the first to third embodiments, the elastic deformation limit of the constricted portion is not limited, and the characteristics at the time of pushing and pulling are determined. By optimizing the movement amount S2 of the tapered bar 69 and the gradient of the tapers 67 and 68, it is possible to obtain an opening amount δ10 larger than the method shown in the first embodiment, and for example, select in the range of 3 to 10 mm. Is possible.

When the lip tip δ9 during operation after pressing the tapered bar 69 is maintained, there is a step between the inner surface of the lower lip 66 and the inner surface of the lower lip mounting side nozzle body 65 at the inlet side nozzle gap δ1. It is preferable to consider that there is no Also in this embodiment, the first to third
Similar to the embodiment, the opening / closing operation of the gap between the upper and lower lips 4, 66 (lip gap, blowing gap) can be performed at any time by operating the hydraulic cylinder 56 remotely.

Therefore, if there is a blockage between the lips 4 and 66 or a coating failure, the lip gap is set to δ8 at this point.
It is possible to discharge the foreign matter having a coating failure to the outside of the free jet liquid supply nozzle 3 by opening it to the outside and blowing out the coating liquid 8. That is, when the lip gap is opened to δ10, the coating liquid 8 is allowed to flow around the foreign matter that has been the cause of blockage or coating failure, and the foreign matter is discharged by the force of the flow of the coating liquid 8. It will come to be. Generally, at least the gap δ1 between the upper and lower lips
By opening 0 to a few mm (larger than the gap δ1 at the base end), foreign matter clogging the lip gap can be removed by the force of the coating liquid even during operation. Of course, after opening the lip gap to δ10 for a predetermined time (which is considered to be sufficient within a few seconds), the lip gap is closed again to the normal value δ1.

Such opening of the lip gap may be carried out with the free jet liquid supply nozzle 3 left in the operating position, or with the free jet liquid supply nozzle 3 being lowered from the operating position by about 100 mm. Is also good. In the former case, the opening operation of the lip gap and the subsequent closing operation can be performed in a shorter time, and in the latter case, the splash base material of the coating liquid 8 generated with the opening of the lip gap. It is easy to reduce the effect on 2.

In this way, by simply opening the lip gap to δ10 by remote control, the upper and lower lips 4,66
The lip gap of the nozzle 3 can be easily cleaned (self-cleaning) in a very short time by the coating liquid 8 itself flowing at high speed, and it is not necessary to stop the traveling of the base material 2. Of course, when cleaning, defective products are generated on the running base material, but this is a slight one, and there is a great merit in that it does not reduce the operating efficiency, and the free jet liquid supply nozzle 3 is good without reducing the production efficiency. It is possible to maintain a stable injection state.

The amount and speed of the coating liquid 8 blown out can generally be adjusted. As a method of enhancing the cleaning effect, it is also effective to increase the blowing pressure, the amount and speed of blowout during cleaning as compared with the normal time. is there. Further, similarly to the first to third embodiments, a sensor for detecting the quality of coating (presence or absence of streaks or the like) is installed in the downstream portion of the coating device (technique conventionally used), and from this sensor information It may be configured such that the occurrence of a defect in the lip gap is determined at an initial stage, and the lip gap is automatically cleaned by opening the lip gap. That is, a detection unit that detects the quality of the coating and a determination unit that determines the occurrence of a defect in the lip gap from this detection information are provided, and if the determination unit determines that a defect has occurred, the controller 90 activates the hydraulic cylinder 70. The automatic control system may be configured so that the lip gap is opened to δ10 for a predetermined time.

[Others] Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and various modifications may be made without departing from the spirit of the present invention. . For example, of the upper and lower lips, only the lower lip is moved to adjust the gap, but this is because the lower lip is easier to secure a moving space, and if the conditions allow, either of the upper and lower lips can be adjusted. It may be moved, or both may be moved. The movement of the lip in the third and fourth embodiments is performed by moving the tapered bars 55 and 69 in the longitudinal direction.
Each taper surface may be set so as to move the lips 5 and 69 in the running direction of the base material or in a direction including both the longitudinal direction and the running direction of the base material to move the lip.

Further, the shape of the upper and lower lips is not limited to a straight shape, and may be curved, and the length of each lip may be longer than the other with respect to the running direction (including both equal lengths). The curved shape of the tip protruding portion is not limited. Further, in each of the embodiments, the scraping blade is arranged in the finishing section, but the invention is not limited to this, and a configuration in which an air knife doctor, a scraping roll is arranged on the downstream side of the nozzle, or scraping on the downstream side is provided. It goes without saying that the present invention can also be applied to a liquid supply nozzle such as a curtain flow coater without a take-up device.

[0093]

As described in detail above, according to the coating apparatus of the present invention, at least one of the pair of lips forming the gap for spraying the coating liquid is opposed to the other by the actuator. By separating it from the tip of the lip, it becomes possible to clean (self-clean) the blowing gap with the coating liquid itself blown from the blowing gap, and the actuator can be By providing an operating means for remote operation (claim 12), when the blowing gap is clogged, the clogging of the blowing gap can be easily cleared by remote control rather than by manual work. Claim 1).

By swinging the above-mentioned one lip around its base end portion by the swinging mechanism, the tip end of one lip is brought into contact with and separated from the tip end of the other lip,
It is possible to efficiently move one lip while reducing the number of movable parts and the amount of movement (claim 2). Further, the swinging mechanism is biased by the biasing means in a direction to separate the one lip from the other lip, and a contact member is brought into contact with the back surface of the one lip so as to face the biasing force. Then, the one lip is configured to swing according to the phase angle of the contact member, and the contact member is rotationally driven by the actuator to adjust the phase angle of the contact member. One lip can be moved reliably and easily (claim 3).

Alternatively, the oscillating mechanism oscillates one of the lips depending on the phase angle by an abutting member that abuts against the one lip in a direction away from the other lip and in a direction approaching the other lip. With such a configuration, and the contact member is rotationally driven by the actuator to adjust the phase angle of the contact member, one lip can be reliably and easily moved (claim 4).

Further, the swinging mechanism is biased by the biasing means in the direction in which one lip is separated from the other lip,
A contact member is brought into contact with the back surface of one lip so as to face this biasing force, and the back surface of one lip is pressed according to the phase position of the contact member to swing one lip. However, even if the contact member is moved by the actuator to adjust the phase position of the contact member,
One lip can be moved reliably and easily (claim 5).

Further, the biasing means is formed in an intermediate portion of one lip so that the tip end portion of one lip is elastically deformable with respect to the base portion, and the tip end portion of one lip is in a natural state. With a fixing means for fixing the base portion of one lip so as to be separated from the tip portion of the other lip, the one lip can be biased with a simple structure (claim 6).

Further, when the free jet type liquid supply nozzle is normally used, the angle of one lip is set so that the gap between the pair of lips narrows toward the blowing side, and when cleaning the free jet type liquid supply nozzle, the pair of lips is set. By setting the angle of one of the lips so that the gap of B spreads toward the blowing side, cleaning (self-cleaning) of the blowing gap by the coating liquid itself blown from the blowing gap can be surely performed ( Claim 7).

Even if the one lip is moved parallel to the other lip by the parallel movement mechanism, the one lip can be moved to perform the self-cleaning. 8). The parallel movement mechanism urges one of the lips in a direction to separate it from the other lip by the urging means, and guides one of the lips to move in a direction of separating from and contacting the other lip by the guide member,
If the opposite inclined surface moves due to the lateral movement of the lip pressing member, one lip can be moved parallel to and away from the other lip through the lip-side inclined surface so that the parallel movement of one lip is surely performed. It is possible (claim 9).

When the free jet type liquid supply nozzle is normally used, the position of one lip is set so as to narrow the gap between the pair of lips, and when cleaning the free jet type liquid supply nozzle, the gap between the pair of lips is widened. By setting the position of the lip, it is possible to reliably clean (self-clean) the blowing gap by the coating liquid itself blown from the blowing gap (claim 10).

During cleaning of the free-jet type liquid supply nozzle, the coating liquid is normally jetted at the operating liquid pressure so that the coating liquid itself is blown out without operating the coating liquid jet pressure. Cleaning (self-cleaning) of the working gap can be easily performed. Furthermore, if the free-jet type liquid supply nozzle is insufficiently washed with the operating fluid pressure, the coating fluid is sprayed at a higher injection pressure than the operating fluid pressure so that the coating fluid itself blows a gap. The cleaning (self-cleaning) can be performed more reliably.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a main part configuration of a coating apparatus as a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a schematic side view showing a main configuration of a coating apparatus as a second embodiment of the present invention.

FIG. 4 is an enlarged view of a main part of FIG.

5 is a sectional view taken along the line BB of FIG.

FIG. 6 is a schematic side view showing a main configuration of a coating apparatus as a third embodiment of the present invention.

7 is a cross-sectional view taken along the line CC of FIG.

FIG. 8 is a schematic side view showing a main configuration of a coating device as a fourth embodiment of the present invention.

9 is a sectional view taken along the line DD of FIG.

FIG. 10 is a schematic side view showing the configuration of a blade type coating apparatus having a general free jet type nozzle.

[Explanation of symbols]

1 Base Material 2 Backing Roll 3 Free Jet Type Liquid Supply Nozzle 4 Upper Lip 5 Lower Lip 6 Cooling Jacket 7 Coater Head 8 Coating Liquid 9, 10, 11 Lip Fixing Bolt 12 Push-pull Bolt 13 Constriction 14 Liquid Transfer Surface 15 Scratch Sucking liquid 16 Scraping blade 17 Spray jet liquid 18 Jet landing point 19 Head body 20 Lower lip 20 'Virtual lower lip 21 when opened Constricted portion (biasing means, swinging mechanism) 22 Eccentric through shaft (abutting means, Rocking mechanism) 23 bearings 24, 25 gears 26a, 26b rotary hydraulic actuators 27a, 27b mounting base 28 lower lip mounting side nozzle body 29 upper lip mounting side nozzle body 30 side plate 31 eccentric shaft virtual position 32, 33 cover 34 eccentric through Shaft (abutting member, swing mechanism) 35 Lower lip 35 'Virtual lower lip portion when opened Position 36 Fixing bolt (fixing means) 38 Guide screw 39 Lower lip mounting side nozzle body 40 Constriction part (swing mechanism) 41 Bearing 42 Lip side bearing 43,44 Oval slot 45 Oval slot 44 position when opened 46 Side Plates 47, 48 Fixing Bolts (Fixing Means) 50 Lower Lip Attachment Side Nozzle Body 51 Lower Lip 51 'Lower Lip Virtual Position 52 When Opened Constriction (Biasing Means, Swinging Mechanism) 53 Lip Side Taper 54 Bar Side Taper 55 Tapered bar (contact member, swinging mechanism) 56 Hydraulic cylinder (actuator) 57 Pressing lever 58 Metal fitting 59 Mounting bracket 60 Side plate 61 Bracket 62 Liquid supply pipe 63 Bar guide groove 65 Lower lip Mounting side nozzle body 66 Lower lip 66 ′ Virtual position of lower lip portion when opened 67 Tapered lip side (lip side inclined surface, parallel movement 68) Tapered bar side (opposed inclined surface, parallel moving mechanism) 69 Tapered bar (pressing member, parallel moving mechanism) 70 Hydraulic cylinder (actuator) 71 Push lever 72 Metal fitting 73 Mounting bracket 74 Tension spring (urging means) 75 Spring receiving bolt and detent nut 76 Detent 77 Side plate 78 Bar guide groove 79 Guide surface 80 Indentation 90 Controller (operating means) α Spray angle δ1 Inlet side nozzle gap δ2 Outlet side nozzle gap (blowout gap) δ3 Eccentric through shaft 22 Lip tip gap after pressing (gap for blowing) δ4 Lip tip gap after opening the eccentric through shaft 22 (gap for blowing) δ5 Eccentric through shaft 34 Lip tip gap after pressing (gap for blowing) δ6 After opening the eccentric through shaft 34 Lip tip gap (blowout gap) δ7 Taper bar 55 pressed Rear Lip Tip Gap (Blowout Gap) δ8 Tapered Bar 55 After Lip Tip Gap (Blowout Gap) δ9 Tapered Bar 69 Lip Tip Gap After Pressing (Blowout Gap) δ10 Tapered Bar 69 After Opening Lip tip clearance (gap for blowing) ζ Distance between backing roll 2 and tip of lower lip 4 ε Eccentricity τ Shaft eccentricity β Eccentric rotation angle O ₁ Shaft centered with bearing 23 O ₂ Eccentric shaft center during operation Position O ₃ Eccentric shaft center position when opened O ₄ Shaft center with the same center as the bearing 41 O ₅ Eccentric shaft center position when initially installed O ₆ Eccentric shaft center position during operation O ₇ Eccentric shaft center position η 1 Pressing side rotation amount of eccentric through shaft 34 after initial installation η2 Open side rotation amount of eccentric through shaft 34 after initial installation S1, S2 Moving stroke amount

Claims (12)

[Claims] 1. A coating apparatus having a free-jet type liquid supply nozzle for injecting a coating liquid onto a base material, wherein at least one of a pair of lips forming a gap for blowing the coating liquid is provided with a tip thereof. A coating apparatus, comprising: an actuator that drives the tip of the other facing lip so as to separate from and contact the tip of the other lip. 2. The coating apparatus according to claim 1, wherein the actuator is connected with a swinging mechanism for swinging the tip end portion of the one lip. 3. The oscillating mechanism comprises urging means for urging the one lip in a direction separating from the other lip.
The actuator rotationally drives the contact member so as to contact the back surface of the one lip and swing the one lip in accordance with the phase angle so as to oppose the biasing force of the biasing means. The coating apparatus according to claim 2, wherein the phase angle of the corresponding contact member is adjusted. 4. The abutment member abuts against the one lip in a direction away from the other lip and in a direction approaching the other lip, and abuts the one lip according to a phase angle. The coating apparatus according to claim 2, wherein the actuator rotationally drives the contact member to adjust the phase angle of the contact member. 5. The oscillating mechanism comprises urging means for urging the one lip in a direction separating from the other lip.
An abutting member that abuts against the back surface of the one lip so as to face the biasing force of the biasing means and presses the one lip back surface according to the phase position to swing the one lip. The coating apparatus according to claim 2, wherein the actuator moves a corresponding contact member to adjust a phase position of the corresponding contact member. 6. The urging means is formed in an intermediate portion of the one lip so as to elastically deform a tip end portion of the one lip with respect to a base portion, and a tip end portion of the one lip. 6. The coating apparatus according to claim 3 or 5, characterized in that the fixing means fixes the base portion of the one lip so as to be separated from the tip portion of the other lip in a natural state. . 7. The swing mechanism sets the angle of one of the lips so that the gap between the pair of lips is narrowed toward the blowing side during normal use of the free jet type liquid supply nozzle, and the free jet is set. 7. The angle of the one lip is set so that the gap between the pair of lips widens toward the blowing side during cleaning of the mold liquid supply nozzle. Coating equipment. 8. The coating mechanism according to claim 1, wherein the actuator is connected with a parallel movement mechanism for moving the one lip in parallel with the other lip in a direction of separating from and contacting the other lip. apparatus. 9. The parallel movement mechanism comprises a biasing means for biasing the one lip in a direction to separate it from the other lip, and a movement in a direction in which the one lip separates from and comes into contact with the other lip. A guide member that guides each other, a plurality of lip-side inclined surfaces that are arranged side by side in the width direction of the base material on the back surface of the one lip, and an opposing inclined surface that abuts each of the lip-side inclined surfaces. A lip pressing member extending in the width direction of the base material, and when the opposite inclined surface moves due to lateral movement of the lip pressing member, the one lip is moved to the other lip via the lip side inclined surface. It is characterized in that it is configured to move toward and away from
The coating apparatus according to claim 8. 10. The parallel movement mechanism sets the position of the one lip so that the gap between the pair of lips is narrowed during normal use of the free jet type liquid supply nozzle, The coating apparatus according to claim 8 or 9, wherein the position of the one lip is set so that a gap between the pair of lips is widened during cleaning. 11. When cleaning the free-jet type liquid supply nozzle, the coating liquid is normally jetted at the operating liquid pressure, and the free-jet type liquid supply nozzle is cleaned at the operating liquid pressure. The coating device according to claim 7 or 10, characterized in that when the amount is insufficient, the coating liquid is jetted at a jet pressure higher than the operating fluid pressure. 12. The coating apparatus according to claim 1, further comprising operating means for remotely operating the actuator from the outside of a traveling line of the base material.