JP5116313B2 - Application head - Google Patents

Description

  The present invention relates to a coating head for coating a coating liquid on the surface of a plate-shaped or belt-shaped member to be coated.

The coating head forms a coating film by applying a coating solution containing a liquid crystal material or a magnetic material on the surface of a plate-like member such as a glass substrate or a strip-like member such as a tape. It is used for manufacturing.
Such a coating head has a schematic shape as shown in the front view of FIG. 5 and the side view of FIG. Further, as shown in FIG. 7 (representing the AA sectional view in FIG. 5), a manifold 20 for storing the coating liquid and a slit 4 for discharging the coating liquid from the tip 2 of the coating head 1 are provided. It comprises at least a pair of front and rear heads 1a and 1b to be formed, and the heads 1a and 1b are integrally coupled by bolts or the like. The coating head 1 is brought close to the surface of the member to be coated 30, the coating head 1 and the member to be coated 30 are relatively moved, and the coating liquid supplied to the manifold 20 through a supply path (not shown) is supplied to the slit 4. A coating film is formed on the surface of the member to be coated 30 by discharging from the tip.

  By the way, in the case of a coating head that coats a coating solution on the surface of a member to be coated such as a liquid crystal substrate or a magnetic tape, it is required to coat the coating solution uniformly with a thickness accuracy of micron order. 1 and the inner surface 4a of the slit 4 are processed with high accuracy.

  Furthermore, the parallelism in the length direction (perpendicular to the drawing) of the slit interval S of the tip 2 of the coating head 1 is extremely important for uniformly coating the coating liquid with a thickness accuracy of the order of microns. The slit interval S is adjusted with submicron accuracy by a plurality of differential screws 5 as shown in FIG. 5 or FIG.

  Further, as shown in FIG. 5, both side surfaces 3 and 3 of the coating head 1 are provided with side covers 6 for restricting the coating width and preventing the coating liquid from leaking from the side surface 3 ( For example, Patent Document 1). The side cover 6 is positioned and adjusted so that the lower end portion 6a of the side cover 6 and the end portion 2 of the coating head 1 are flush with each other, and the side surface 3 of the coating head is provided with a plurality of bolts 7 as shown in FIG. It is common to fix to (for example, patent document 2).

JP 2006-255646 A JP 2006-198501 A

However, among the plurality of bolts 7 for fixing the side cover 6, when the bolt 8 on the distal end side 3 a of the side surface 3 of the coating head 1 is tightened, the side end side 2 a of the distal end portion 2 of the coating head 1 is distorted. was there. The cause of the distortion occurring on the side end 2a of the tip 2 of the coating head 1 by tightening the bolt 8 in this way is shown in FIG. 8 (representing the BB cross section in FIG. 5). The accuracy error of the bolt itself such as the straightness of the shaft portion 8a of the bolt 8 and the perpendicularity between the head lower surface 8b of the bolt 8 and the shaft portion 8a, or the screw formed on the shaft portion 8a of the bolt 8 and the side surface 3 of the coating head 1 It can be presumed that a force in an unnecessary direction acts on the side end side 2 a of the tip end portion 2 of the coating head 1 due to core blurring with the coating head 9 or the like.
In addition, since it is difficult to process the perpendicularity between the inner surface 4a of the slit 4 and the side surface 3 of the coating head 1 and the flatness of the side surface 3 itself on the order of microns, the side surface 3 and the side surface of the coating head 1 are difficult to process. It is inevitable that a gap is formed between the cover 6 and this also causes strain on the side end side 2 a of the tip end portion 2 of the coating head 1 when the bolt 8 on the tip side 3 a of the side surface 3 of the coating head 1 is tightened. It was the cause that occurred.
Due to these strains, the slit interval S adjusted on the order of the sub-micron angle is distorted on the side end side 2a of the front end portion 2. Therefore, after the side cover 6 is tightened with the bolt 8, the slit interval S in the vicinity of the side cover 6 again. Had to be readjusted with the differential screw 5 again.

Further, when the coating operation is paused for a long time, when the coating solution is changed, or when the coating solution is hardened and adhered to the inside of the coating head for some reason, the side cover 6 is removed and the coating head 1 is removed. However, in this case as well, the adjustment described above must be performed during assembly.
Furthermore, the same adjustment as described above is required when assembling after disassembling the coating head 1 for grinding repair and regrinding the tip 2 of the coating head 1 and the inner surface 4a of the slit 4.

  The present invention has been made in view of the drawbacks of the conventional coating head as described above, and the slit interval does not change even after the operation of attaching the side cover to the side surface of the coating head is performed. It is an object to provide a coating head.

In order to solve the above-mentioned problems, the present invention has a manifold and a slit formed by at least a pair of front and rear heads, and a side cover for regulating the coating width is provided on both the left and right sides of the pair of heads. A shaft of at least one bolt on the tip side of the side surface of the coating head among a plurality of bolts for fixing the side cover to the side surface of the coating head in a coating head that applies the discharged coating liquid to the coated member. the parts, between the head lower surface and the side cover of the bolt, by adjusting the amount of compression by screwing amount of the bolt, the side cover to the side of the coating head Rukoto pressed with a predetermined force, the side of the coating head coating head provided with a biasing means capable to prevent the distortion of the tip side to maintain the distal end side of the slit spacing of the side of the coating head to a predetermined distance To.

  If the coating head is configured in this way and the side cover is pressed against the side surface of the coating head by a biasing means with a force that does not cause distortion on the side of the tip of the coating head, the slit interval S changes. Will disappear.

  In addition, a small diameter shaft portion is formed on a part of the shaft portion of the bolt on the side end side of the coating head front end portion, and the small diameter shaft portion is provided with a retaining ring for preventing the urging means from coming off. The means is preferably mounted between the bottom surface of the bolt head and the retaining ring for preventing slippage. As a result, the urging means does not come off from the bolt.

  The urging means is a coil spring or an elastic body made of rubber or soft resin material. By using a coil spring, rubber, or the like as the urging means, the required pressing force can be obtained with the amount of compression of the urging means by screwing in the bolt.

  According to the present invention, readjustment of the slit interval after the side cover is attached becomes unnecessary. As a result, the work efficiency of assembling and adjusting the coating head is extremely improved.

Embodiments of the present invention will be described below with reference to FIGS.
FIG. 1 is a partial front view showing an embodiment of a coating head according to the present invention. FIG. 2 is a partial front view for explaining another embodiment of the coating head according to the present invention. FIG. 3 is a partial front view for explaining another embodiment of the coating head according to the present invention. FIG. 4 is a partial front view for explaining another embodiment of the coating head according to the present invention.

  In FIG. 1, among the plurality of bolts 7 that fix the side cover 6, at least one or more bolts 8 that are screwed into the distal end side 3 a of the side surface 3 of the coating head 1 include the head lower surface 8 b of the bolt 8 and the side cover 6. Between them, there is provided a biasing means 10 that presses the side cover 6 against the side surface 3 of the coating head 1 with a predetermined compressive force by screwing in the bolts 8. The biasing means 10 uses a coil spring in this embodiment.

When the side cover 6 is attached, the biasing means 10 applies a compressive force that does not cause liquid leakage between the side cover 6 and the side surface 3 and that does not cause distortion on the side end side 2 a of the tip end portion 2 of the coating head 1. The compression height X is adjusted. In this case, the force that presses the side cover 6 against the side surface 3 is sufficient, for example, to the extent that an adult presses with the thumb, and is preferably in the range of 3 kg to 10 kg. If the compression height X of the urging means 10 at this time is measured, the screw 8 can be easily screwed in by the compression height X of the urging means 10 even if the side cover 6 is repeatedly attached. Can be set.
Further, by using a coil spring as the urging means 10, it is easy to select a spring pressure necessary for urging, a dimension necessary for mounting on the bolt 8, and the like from coil springs in the market, It can be purchased at a low price.

  FIG. 2 shows another embodiment of the coating head according to the present invention. As shown in FIG. 2, a small-diameter shaft portion 11 is formed on a part of the shaft portion 8 a of the bolt 8, and a stop member 12 for preventing the urging means 10 from coming off is provided on the small-diameter portion shaft portion 11. To do. The shape of the small diameter shaft portion 11 is such that when the bolt 8 is provided on the side surface 3 of the coating head 1 and screwed into the screw 9, the stop member 12 abuts against the side cover 6 and is between the head lower surface 8 b of the bolt 8. While a certain urging means 10 is compressed, the urging means 10 is moved in the axial direction of the small-diameter shaft portion 11 to a position where the urging means 10 reaches a predetermined compression force. As a result, the biasing means 10 is not detached from the bolt 8 when the side cover 6 is attached or detached, so that the side cover 6 can be easily attached or detached. A commercially available E-type retaining ring can be used as the retaining member 12. By using the E-type retaining ring as the retaining member, it can be easily mounted on the small diameter shaft portion 11 of the bolt 8.

  Further, by providing a washer 40 between the urging means 10 and the head lower surface 8b of the bolt 8 as shown in FIG. 3, it becomes a more preferred embodiment, and the shape of the washer 40 and the stopper member 12 is changed to the head of the bolt 8. The outer diameter of the coil spring can be increased by making the outer diameter larger than the outer diameter of the coil head, and it becomes possible to provide a coating head having a more stable biasing means.

  FIG. 4 uses an elastic body made of rubber, soft resin or the like as the urging means 10 and can obtain the same effect as the coil spring described above.

  In the above-described embodiment, the force for pressing the side cover 6 against the side surface 3 of the coating head 1 is 3 kg to 10 kg. However, the force is not limited to this value, and the side surface 3 of the coating head 1 and the side cover 6 Of course, there is no problem as long as there is no leakage of the coating liquid and the pressing force does not change the slit interval S due to distortion at the side end 2a of the tip 2 of the coating head 1. That is.

  Moreover, although rubber, soft resin, etc. were illustrated as the urging | biasing means 10 of an elastic body, it is not limited to this, Several disk springs or a spring washer can also be used in piles.

  Moreover, although the E-type retaining ring has been exemplified as the retaining member 12, the present invention is not limited to this, and any retaining member may be used as long as it fulfills the object of the present invention.

  As described above, in this embodiment, a pair of front and rear heads has been described. However, the same effect can be obtained by using a three-head coating head having a central head in the middle of the front and rear heads and two rows of slits. Can do.

The partial front view which shows one Embodiment of the coating head which concerns on this invention. The partial front view which shows another embodiment of the coating head which concerns on this invention. The partial front view which shows another embodiment of the coating head which concerns on this invention. The partial front view which shows another embodiment of the coating head which concerns on this invention. The front view of the coating head for demonstrating the outline | summary of a coating head. The side view of the coating head for demonstrating the outline | summary of a coating head. AA sectional drawing of FIG. BB sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Application | coating head 2 Tip part 2a (of application head 1) Side end side 3 (of application head 1) Side surface 3a (of application head 1) End side 4 Slit 4a Inner surface of slit 5 Differential screw 6 Side Cover 6a Side cover tip 7 Bolt 8 Bolt 8a Bolt shaft 8b Bolt head bottom surface 9 Female screw 10 Energizing means 11 Small-diameter shaft 12 Stopping member 20 Manifold 30 Applied member 40 Washer S Slit interval X Compression height The

Claims (4)

A manifold and a slit are formed by at least a pair of front and rear heads, and side covers for regulating the coating width are provided on both left and right side surfaces of the pair of heads, and a coating liquid discharged from the slit is applied to a member to be coated. In the application head
Among the plurality of bolts for fixing the side cover to the side surface of the coating head, at least one of the bolts on the tip side of the side surface of the coating head includes a bottom surface of the head of the bolt and the side. prevention between the cover, by adjusting the amount of compression by screwing amount of the bolt, in Rukoto pressing the side cover with a predetermined force to the side of the coating head, the strain of the distal side of the coating head The application head is provided with an urging means capable of maintaining the slit interval at the front end side of the side surface of the application head at a predetermined interval . A small-diameter shaft portion is formed on a part of the shaft portion of at least one bolt on the front end side of the side surface of the coating head, and the small-diameter shaft portion is provided with a stop member for preventing the biasing means from coming off, 2. The coating head according to claim 1, wherein the urging unit is mounted between a lower surface of the head of the bolt and the stopper member for preventing detachment. Coating head according to claim 1 or claim 2 wherein the biasing means is characterized by a coil spring. Coating head according to claim 1 or claim 2, wherein said biasing means is an elastic body.

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