JP2006289260A - Coating head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify attaching operation of a differential screw adjusting the space between a coating head and a slit. <P>SOLUTION: A coating head comprises a pair of lip members 11, 12 forming a slit 13 facing arranged with an interval, a flow passage of a coating liquid installed interconnecting the slit, a notch groove 15 formed along the extending direction of the slit in the side surface of the one lip member, the differential screw 16 engaged to a foot part 11a of the lip member pinching the notch groove and 11b. The outer screw of a lead screw of the differential screw is threaded into a screw hole 17 formed by penetrating the foot part of the lip member, the tip end of a machine screw 16b of the differential screw is threaded into a cylindrical nut 18, a hole 19 which is inserted with the nut 18 is formed at the tip end part of the lip member, a screw hole 20 formed from the side surface of the tip end part toward the hole 19, and a setscrew 21 is screwed into the screw hole 20 to fix the machine screw 16b to a lip part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a coating head used in a coating apparatus that forms a coating film of various materials on the surface of a plate-like or belt-like substrate.

  The coating device forms a coating film by applying a liquid crystal material, magnetic material, molten resin, coating liquid, etc. to the surface of a plate-like or strip-like substrate made of glass, metal, paper, resin, etc. It is used for manufacturing liquid crystal substrates, magnetic tapes, etc., or for molding vinyl sheets, foam sheets, and the like.

  For example, as described in Patent Document 1, the coating apparatus moves a coating head having a slit close to or in contact with the surface of the base material and relatively moves the coating liquid to flow out of the slit to form the base material. It is comprised so that a coating film may be formed in the surface of. The coating head has, for example, a liquid reservoir chamber that communicates with the slit, and is configured to supply a liquid coating material in which a liquid crystal material or a magnetic material is dissolved in the liquid reservoir chamber, and to allow the coating liquid to flow out from the slit. Is done. .

  Generally, in a coating apparatus, it is necessary to adjust the interval between the slits of the coating head in order to make the coating film have a uniform thickness. Therefore, for example, in the coating head described in Patent Document 1, as shown in FIG. 4, a pair of lip members 1, 2 are opposed to each other with a gap to form a slit 3, and one lip member 1 has a slit. 3 is provided with a notch groove 5 extending in the extending direction 3, and the differential screw 6 is screwed into the base 1 a and the tip 1 b of the lip member 1 with the notch groove 5 interposed therebetween, and the differential screw 6 is adjusted. A gap adjusting mechanism for finely adjusting the gap of the slit 3 by bending the tip of the lip member 1 is provided.

  As shown in FIG. 4, the differential screw 6 used in the gap adjusting mechanism is formed by screwing a child screw 6b into an inner screw of a parent screw 6a having a coaxial outer screw and an inner screw. The outer screw and the inner screw are threaded in the same direction. Then, the lead screw 6a is screwed into a screw hole 7 formed by penetrating the base portion 1a of the lip member 1, and the tip of the child screw 6b is inserted into the hole 8 formed in the tip portion 1b of the lip member 1, A pin 9 is inserted into the through hole provided at the tip of the child screw 6b from the outside of the tip portion 1b of the lip portion so as to prevent rotation of the child screw 6b and the lead screw 6a. In Patent Document 1, a lead screw and a child screw are formed integrally, screwed into a screw hole formed by penetrating the parent screw through the base of the lip portion, and a nut is screwed into the tip of the child screw. The nut is inserted into the hole formed at the tip of the lip, and a pin is inserted into the through hole provided in the nut from the outside of the tip of the lip to prevent rotation of the child screw and the lead screw. An example of this is also described.

  According to the conventional example of FIG. 4, for example, when the screw pitch P1 of the lead screw 6a is 1 mm and the screw pitch P2 of the slave screw 6b is 0.8 mm, when the lead screw 6a is rotated once (forward or backward), the slave screw 6b Moves 0.8 mm with respect to the lead screw 6 a (retreat or advance). Therefore, the child screw 6 b substantially moves (forward or retreat) by a screw pitch difference (P1−P2) = 0.2 mm. Thereby, the gap | interval of the slit 4 can be adjusted finely.

Japanese Utility Model Publication No. 2-25073 (public utility Heisei 2-25073)

  However, although Patent Document 1 does not describe a procedure for assembling the differential screw 6 to the lip portion 1, the assembling work may take time or may be complicated.

  That is, in FIG. 4, in order to insert the pin 9 into the through hole formed in the tip of the child screw 6b (or a nut in another example), the rotation angle and advance / retreat of the through hole at the tip of the child screw 6b It is necessary to adjust the position of the direction to the position of the pin 9 to be inserted. For this alignment, for example, the lead screw 6 a is turned to insert the tip of the slave screw into the hole 8, and the position of the through hole at the tip of the slave screw in the advancing / retreating direction is adjusted to the position of the pin 9. However, since the rotation of the child screw 6b is not restricted at this time, the tip of the child screw is inserted into the hole 8 while rotating together with the forward rotation of the parent screw 6a. Therefore, even if the position of the through hole at the distal end of the child screw matches the position of the pin 9, the rotation angle of the through hole at the distal end of the child screw often does not match the position of the pin 9. Therefore, in order to align the rotation angle of the through hole at the tip of the child screw with the position of the pin 9, the rotation angle of the through hole at the tip of the child screw must be rotated by a maximum of 1/2 rotation (180 degrees). For example, when the lead screw 6a is rotated in the reverse direction and the rotation angle of the through hole at the tip of the child screw is turned 180 degrees, the position of the through hole at the tip of the child screw is set to a half of the screw pitch P1 of the lead screw 6a (described above). In the specific example, it moves backward by 0.5 mm). As a result, even if the rotation angle of the through hole at the tip of the child screw matches the position of the pin 9, the position of the through hole at the tip of the child screw deviates from the position of the pin 9. Therefore, in a state where the rotation angle of the through hole at the tip of the child screw is aligned with the position of the pin 9, this time, the child screw 6b is constrained by some method, and the lead screw 6a is advanced again to pass through the hole at the tip of the child screw. It is necessary to adjust the position of the forward / backward direction to the position of the pin 9. At this time, if the position of the tip of the child screw is advanced, the lead screw 6a and the child screw 6b operate differentially. For example, to advance by half of the screw pitch P1 (in the above example, 0.5 mm). In addition, the lead screw 6a needs to be rotated 2.5 times.

  In particular, in order to finely adjust the gap between the slits, it may be desired to reduce the difference between the screw pitch P1 of the lead screw 6a and the screw pitch P2 of the slave screw 6b. In this case, for example, if P1 = 0.85 mm and P2 = 0.8 mm, the tip of the child screw 6b is also retracted together by 0.425 mm by rotating the lead screw 6a backward by 180 degrees. If the backward movement is advanced by differential operation to adjust, the rotation speed of the lead screw 6a becomes 0.425 / (0.85-0.8) = 8.5 rotations. Therefore, according to the conventional example of FIG. 4, there is a problem that the assembling work becomes complicated and the adjustment takes too much time. In particular, there is a problem when a plurality of differential screws must be provided in the longitudinal direction of the coating head in order to adjust the gap between the slits with high accuracy. Moreover, considering the adjustment allowance, there is a problem that the lead screw 6a must be made longer than necessary.

  An object of the present invention is to simplify the work of assembling a differential screw for adjusting the interval between slits of a coating head.

  In order to solve the above-described problems, the present invention provides a pair of lip members that are arranged to face each other with a gap therebetween to form a slit, a flow path for a coating solution provided in communication with the slit, A notch groove formed on the side surface of the lip member along the extending direction of the slit, and a differential screw engaged with a base portion and a distal end portion of the lip member sandwiching the notch groove, The differential screw includes an outer screw screwed in the same direction on the inner and outer surfaces of a cylinder, a parent screw having an inner screw, and a child screw screwed to the inner screw of the parent screw. The lead screw is screwed into a screw hole formed through the base portion of the lip member, a cylindrical nut is screwed to the tip of the child screw, and the tip of the lip member is A hole into which the cylindrical nut at the tip of the female screw is inserted, and toward the hole Characterized in that it constituted by providing a fixing means for pressing and fixing the outer periphery of the inserted said tubular nut from the side surface of the tip portion Te.

  That is, when the child screw is locked to the lip portion, it is only necessary to press and fix the outer periphery of the cylindrical nut screwed to the tip of the child screw to the tip portion of the lip portion. Therefore, the advance / retreat position of the tip of the child screw can be adjusted only with the lead screw. Moreover, since it is not necessary to adjust the rotation angle of the tip of the child screw, the assembling work of the differential screw for adjusting the slit interval of the coating head can be simplified and the assembling time can be greatly shortened. Moreover, it is not necessary to set the length of the lead screw to allow for the adjustment allowance.

  In the above case, the fixing means includes a screw hole penetrating from the side surface of the tip portion toward the hole, and a set screw screwed into the screw hole. According to this, at the time of disassembling and cleaning the coating head, after the differential screw is removed and cleaned, the differential screw can be easily assembled again.

  In addition, a groove can be formed on the outer periphery of the nut, and the screw hole of the fixing means can face the outer peripheral groove of the nut and be inclined toward the bottom of the hole. Thereby, since the set screw is locked to the groove wall of the outer peripheral groove, the nut can be prevented from coming out of the hole, and the reliability of the slit width adjustment setting is improved.

  According to the present invention, it is possible to simplify the assembly work of the differential screw that adjusts the interval between the slits of the coating head.

Hereinafter, the present invention will be described based on illustrated embodiments.
(Embodiment 1)
FIG. 1 shows a cross-sectional view of the main part of one embodiment of the coating head of the present invention. This figure shows a partial cross section of the lip member of the coating head, which is formed with a longitudinal direction in a direction perpendicular to the paper surface, according to the coating width of the substrate.

  As shown in the figure, the coating head has slits 13 formed by making the tip portions (downward in the figure) of the pair of lip members 11 and 12 face each other with a gap therebetween. The slit 13 is provided in communication with a liquid reservoir chamber 14 that forms a part of the flow path of the coating liquid formed inside the lip member 12. The liquid reservoir chamber 14 is supplied with a coating liquid from a coating liquid supply apparatus (not shown). A notch groove 15 is formed on the side surface of one of the pair of lip members 11 along the extending direction over the entire length of the slit 13. By this notch groove 15, the lip member 11 is divided into a base portion 11a and a tip portion 11b. And the differential screw | thread 16 is engaged over the base 11a and the front-end | tip part 11b. The differential screw 16 includes an outer screw and an inner screw threaded in the same direction on the inner and outer surfaces of a cylinder, and a child screw 16b screwed to the inner screw of the parent screw 16a. Has been.

  The outer screw of the lead screw 16a is screwed into a screw hole 17 formed so as to penetrate the base portion 11a of the lip member. A cylindrical nut 18 is screwed onto the tip of the female screw 16b. Further, the nut 18 has a hole 19 into which the nut 18 is inserted at a portion facing the notch groove 15 of the tip portion 11b of the lip member. Then, a screw hole 20 extending from the inner periphery of the hole 19 to the side surface of the tip end portion 11b is drilled, and a set screw 21 is screwed through the screw hole 20, whereby the nut 18 is pressed and fixed to the tip end portion 11b. ing.

  With this configuration, according to the present embodiment, the opening tip of the slit 13 formed by the pair of lip members 11 and 12 of the coating head is brought close to the surface of the substrate on which the coating film is to be formed. Or by bringing the coating head and the base material relatively moved by a coating film apparatus (not shown), the coating liquid in the liquid reservoir chamber flows out through the slit 13 and is A coating film can be formed on the surface of the material.

  When adjusting the slit width d at the opening tip of the slit 13, the leading end portion 11 b of the lip member 11 to which the leading end of the slave screw 16 b is locked is turned by turning the lead screw 16 to advance or retract the slave screw 16 b. The slit width d at the opening tip of the slit 13 is changed by bending the thin portion formed by the notched groove 15 as a starting point. By changing the slit width d, it is possible to adjust the outflow amount of the coating liquid. By providing the slits in a plurality of locations along the extending direction of the slit 13, the slit width d can be adjusted to a plurality of lengths of the coating head. It becomes possible to adjust at a location, and it can adjust so that the thickness of the coating film formed on the surface of a base material may become uniform.

  Next, the procedure for assembling the differential screw 16 of this embodiment to the lip member 11 will be described with reference to FIG. First, when the outer diameter of the cylindrical nut 18 is smaller than the inner diameter of the screw hole 17, the cylindrical nut 18 is screwed onto the tip of the female screw 16b of the differential screw 16, and then the lead screw 16a is used as the screw of the base 11a. The nut 17 is sufficiently inserted into the hole 19 by being screwed into the hole 17. When the outer diameter of the cylindrical nut 18 is larger than the inner diameter of the screw hole 17 and the width of the notch groove 15 is larger than the thickness of the nut 18, the following assembling procedure may be used. it can. First, the lead screw 16a is screwed into the screw hole 17 of the base portion 11a, and is advanced to a position where the tip of the child screw 16b faces the notch groove 15. Then, the nut 18 is screwed into the tip of the child screw 16 b, and then the lead screw 16 a is further rotated to advance, and the portion of the nut 18 is sufficiently inserted into the hole 19. Then, the nut 18 is pressed and fixed to the distal end portion 11 b of the lip portion 11 by screwing a set screw 21 into the screw hole 20. Thereby, since the child screw 16b is locked to the lip portion 11, the parent screw 16a and the child screw 16b are in a state where differential operation is possible.

As described above, according to the present embodiment, the set screw 21 is screwed into the outer periphery of the nut 18 screwed to the tip of the slave screw, and the slave screw 16b is fixed to the tip portion 11b. The rotation angle and the position in the forward / backward direction of the tip of the head are not restricted at all. Therefore, the advance / retreat position of the tip of the child screw 16b can be adjusted only with the lead screw 16a, and the rotation angle of the child screw 16b is not restricted at all. Can be greatly shortened. Further, it is not necessary to make the length of the lead screw 16a to allow for the adjustment allowance.
(Embodiment 2)
FIG. 3 shows a cross-sectional view of the main part of another embodiment according to the coating head of the present invention. This embodiment is different from the embodiment of FIG. 1 in the structure in which the cylindrical nut 18 is pressed and fixed in the hole 19. That is, the groove 18a is formed in the nut 18 of this embodiment along the cylindrical outer peripheral surface. Further, the screw hole 20 into which the set screw 21 is screwed is drilled from the position shifted to the notch groove 15 side toward the inner surface of the hole 19 instead of the side surface of the tip end portion 11b. That is, the screw hole 20 is formed so as to face the groove 18 a of the nut and to be inclined toward the bottom of the hole 19. As a result, when the set screw 21 is screwed into the screw hole 20, the tip of the set screw 21 hits the groove wall of the groove 18a of the nut 18, and when further screwed, the nut 18 is strongly pressed against the bottom surface and the inner surface of the hole 19 by the set screw 21. And firmly fixed. In particular, since the set screw 21 is locked to the groove wall of the groove 18a, the nut 18 can be prevented from coming out of the hole 19, and the reliability of the slit width adjustment setting is improved.

  As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to the said embodiment, A various deformation | transformation can be performed. For example, a knock pin can be used instead of the set screw 21. In this case, it goes without saying that the screw hole 20 is changed to a pin hole.

It is sectional drawing of the lip member of the coating head front-end | tip which is the principal part of one Embodiment which concerns on the coating head of this invention. It is a figure explaining the assembly | attachment procedure of the differential screw which concerns on this invention. It is sectional drawing of the lip member of the coating head front-end | tip which is the principal part of other embodiment of this invention. It is sectional drawing of the lip member of the application head tip of a prior art example.

Explanation of symbols

11, 12 Lip member 11a Base 11b Tip 13 Slit 14 Liquid reservoir 15 Notch groove 16 Differential screw 16a Lead screw 16b Child screw 18 Nut 19 Hole 20 Screw hole 21 Set screw

Claims (3)

A pair of lip members that are arranged to face each other with a gap therebetween to form a slit, a flow path for the coating solution provided in communication with the slit, and a direction in which the slit extends in the side surface of one of the lip members And a differential screw engaged with a base portion and a distal end portion of the lip member sandwiching the notch groove, and the differential screw is formed on the inner and outer surfaces of the cylinder. In an application head comprising a lead screw having an outer screw and an inner screw threaded in the same direction, and a child screw screwed to the inner screw of the lead screw,
The lead screw is screwed into a screw hole formed through the base of the lip member, and a cylindrical nut is screwed to the tip of the child screw.
A hole into which the cylindrical nut at the distal end of the female screw is inserted at the distal end portion of the lip member, and a fixing that is inserted from the side surface of the distal end portion toward the hole and presses and fixes the outer periphery of the cylindrical nut. And a coating head.   The coating head according to claim 1, wherein the fixing means is a screw hole penetrating from a side surface of the tip portion toward the hole and a set screw screwed into the screw hole.   A groove is formed on the outer periphery of the nut, and the screw hole of the fixing means faces the outer peripheral groove of the nut and is inclined and drilled toward the bottom of the hole. The coating head according to claim 2.

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