JP2000093865A - Coating liquid supply method and apparatus - Google Patents

Abstract

(57) [Problem] To supply a coating liquid such as a phosphor liquid to a base material such as a front panel of a cathode ray tube, and to apply the coating liquid only to necessary portions on the inner surface of the base material. Supply. SOLUTION: While continuously applying the coating liquid 20 from a coating liquid supply unit 30, the coating liquid supply unit 30 is connected to an inner surface 12 of a substrate 10.
A coating liquid supply step of reciprocating along and supplying the coating liquid 20 to the base material inner surface 12, and when the coating liquid supply unit 30 moves in a direction approaching the outer peripheral wall 14 of the base material 10, A shielding member advancing step of advancing the shielding member 60 to a position covering from the upper side of the outer peripheral wall 14 to the inner side near the outer peripheral wall 14, and the coating liquid supply unit 30 moves in a direction away from the outer peripheral wall 14 of the base material 10. Sometimes, a shielding material retreating step of retreating the shielding material 60 to a position covering only the upper part of the outer peripheral wall 14 is included.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for supplying a coating liquid, and more particularly to a method and apparatus for supplying a coating liquid as a material for a fluorescent film to an inner surface of a front panel used for a cathode ray tube for a TV. And a device used in the method.

[0002]

2. Description of the Related Art A general cathode ray tube for a TV includes a funnel-shaped cathode ray tube main body and a front panel made of transparent glass and covering the front surface of the cathode ray tube main body. The structure of the front panel is a deep dish having a moderately curved central surface and a frame-shaped outer peripheral wall erected on the outer periphery of the central surface. The end portion of the outer peripheral wall is joined to the front end surface of the cathode ray tube main body, and the cathode ray tube is assembled.

A phosphor layer is formed on the inner surface of the front panel, and an image can be displayed by emitting light from the phosphor layer by an electron beam irradiated from an electron gun. In a color TV cathode-ray tube, phosphor layers of a plurality of colors are formed in a pattern shape such as a dot shape or a stripe shape. To form a phosphor layer on the front panel, a material liquid to be a phosphor layer is supplied to the inner surface of the front panel using a means such as discharge supply from a nozzle to form a coating film. Then, an operation of drying and curing the coating film or forming the coating film into a predetermined pattern is performed.

As a means for supplying the phosphor liquid, a large number of fine discharge holes are arranged in an axial direction on a supply arm crossing above the front panel, and the phosphor liquid is simultaneously curtain-shaped from the large number of discharge holes. A method of supplying the phosphor liquid to the entire inner surface of the front panel by ejecting the phosphor liquid in such a state and moving the supply arm for discharging the phosphor liquid in parallel above the front panel is known. By reciprocating the supply arm discharging the phosphor liquid,
A predetermined amount of phosphor liquid can be efficiently supplied to the front panel.

[0005]

However, in the conventional technique of supplying the phosphor liquid to the front panel, there is a problem that the phosphor liquid adheres to portions where the phosphor liquid is not desired to adhere. It is necessary to apply the phosphor liquid to the inner surface of the central surface of the front panel to which the electron beam is irradiated, but it is not necessary to apply the phosphor liquid to the outer peripheral wall where no image is displayed.

[0006] In addition, for example, if the phosphor liquid adheres to the end of the outer peripheral wall serving as a joining surface when the front panel is joined to the cathode ray tube body, the joining operation becomes difficult. If the phosphor liquid attached to the end of the outer peripheral wall is removed after the application of the coating liquid, the overall productivity is reduced. Further, if the phosphor liquid adheres to the inner surface of the outer peripheral wall and is dried and hardened to form a fluorescent film, unnecessary light emission is generated and the quality performance of the CRT is impaired.

In the above-described method of supplying the phosphor liquid by the supply arm, if the supply of the phosphor liquid is performed intermittently, the discharge hole of the supply arm is easily clogged due to the characteristics of the phosphor liquid. It is practiced to keep the body fluid flowing. If such continuous ejection is performed,
When the supply arm passes between the outside and the inside of the front panel, the phosphor liquid will inevitably adhere to the outer peripheral wall.

[0008] Therefore, it is conceivable to arrange a shielding material for preventing the adhesion of the phosphor liquid above the outer peripheral wall. Such a shielding material must surely expose an area of the front panel to which the phosphor liquid on the inner surface is to be supplied, and securely cover an outer peripheral wall for preventing adhesion of the phosphor liquid. However, when the supply arm is reciprocated, the phosphor liquid adheres to the inner wall of the outer peripheral wall, which is supposed to be covered with the shielding material, and further, the adhered substance grows by drying as it is, or the phosphor liquid is supplied. There arises a problem that a portion where the phosphor liquid is not supplied is formed on the inner surface which must be provided.

It is an object of the present invention to provide a technique for supplying a coating liquid to an inner surface of a substrate surrounded by an outer peripheral wall, such as when supplying a phosphor liquid to the front panel of a cathode ray tube. Is to reliably and easily supply the coating liquid only to the required places.

[0010]

A coating liquid supply method according to the present invention is a method for supplying a coating liquid to an inner surface of a substrate surrounded by an outer peripheral wall, comprising a coating liquid supply step and a shielding material advance step. And a shielding material exiting step. In the coating liquid supply step, the coating liquid supply section is reciprocated along the inner surface of the substrate while continuously discharging the coating liquid from the coating liquid supply section to supply the coating liquid to the inner surface of the substrate.

In the shielding material advance step, when the coating liquid supply unit moves in the direction approaching the outer peripheral wall of the base material, the shielding material is advanced to a position covering from above the outer peripheral wall to inside the vicinity of the outer peripheral wall. Let it. In the shielding member retreating step, when the coating liquid supply unit moves in a direction away from the outer peripheral wall of the base material, the shielding material is retreated to a position covering only above the outer peripheral wall.

The coating liquid supply apparatus of the present invention is an apparatus for applying a coating liquid to an inner surface of a substrate surrounded by an outer peripheral wall, and includes a coating liquid supply section, a shielding material, and a coating liquid receiving tank. The coating liquid supply unit reciprocates along the inner surface of the substrate, and continuously discharges and supplies the coating liquid to the inner surface of the substrate. The shielding material is disposed above the outer peripheral wall of the base material in the end direction of the reciprocating motion of the coating liquid supply unit so as to be able to advance and retreat toward the inside of the outer peripheral wall.

The coating liquid receiving tank is arranged outside the base material and receives the coating liquid falling from the shielding material. Each component requirement will be specifically described. [Base] A base made of glass, synthetic resin, ceramic, metal or the like is used, and the shape of the base is not particularly limited as long as it has an inner surface surrounded by an outer peripheral wall.

As a substrate, a front panel for a cathode ray tube is used. The front panel is made of glass, has a central surface that is gently curved and has a substantially rectangular planar shape, and an outer peripheral wall erected on the outer periphery of the central surface. The central plane is
It may be substantially planar with little curvature. In addition to the front panel, any member having a similar structure and to which various coating liquids can be applied can be used as a base material. For example, the present invention can be applied to various electronic tube structures other than the CRT.

The base material may have a polygonal planar shape other than a rectangular shape, or may have a curved planar outer shape. The outer peripheral wall may have a vertical wall shape having substantially the same vertical thickness, a tapered wall shape tapering upward from below, or an inclined wall shape inclined from inside to outside. The central surface and the outer peripheral wall of the base material may be integrally formed, or may be formed by integrally joining separately manufactured members to form the base material. [Coating liquid] An arbitrary coating material is used according to the type and purpose of the coating film applied to the substrate. In the case of the front panel described above, a coating liquid containing a material for forming a fluorescent film is used. In addition, a coating liquid for coloring or a coating liquid for producing an electrically or chemically functional film is also used.

The coating liquid is supplied at room temperature,
Some are supplied in a heated state. [Coating liquid supply unit] The coating liquid supply unit includes a coating liquid discharge port including holes, slits, nozzles, and the like, and a coating liquid supply path for feeding the coating liquid to the coating liquid discharge port. The coating liquid supply unit may be configured to store the coating liquid therein, or may be connected to a hose or a pipe to which the coating liquid is supplied from the outside, a filter for removing foreign substances, or the like.

To reciprocate the coating liquid supply unit, a reciprocating mechanism in a usual mechanical device is used. For example, the coating liquid supply unit may be attached to a forward / reverse rotating belt mechanism, or a reciprocating mechanism such as a ball screw or a rack and pinion mechanism may be provided. The coating liquid supply unit can be provided movably in the horizontal direction orthogonal to the direction of the reciprocating motion simultaneously with the reciprocating motion. Also, it can be provided so as to be movable in the vertical direction simultaneously with the reciprocation.

If the coating liquid supply section is provided across the substrate in a direction perpendicular to the direction of reciprocation, and if a large number of coating liquid supply ports are provided along the axial direction of the coating liquid supply section, The coating liquid discharged from a large number of coating liquid supply ports can be supplied to the substrate while flowing down in the form of a curtain, and the coating liquid can be efficiently supplied over the entire width of the substrate at the same time. If the coating liquid supply ports arranged along the axial direction of the coating liquid supply unit are alternately arranged in and out in the front-rear direction orthogonal to the axial direction, and are arranged in a staggered manner, the installation interval between the coating liquid supply ports , The distance between the coating liquid supply ports in the axial direction of the coating liquid supply section can be reduced. This is useful for uniformly and efficiently supplying the coating liquid to the inner surface of the substrate.

When the coating liquid supply section is reciprocated, the position where the coating liquid is supplied to the inner surface of the base material can be changed between the forward path and the return path. Specifically, the coating liquid supply port or the coating liquid supply section may be moved in the direction perpendicular to the direction of reciprocation between the forward path and the return path. This makes it possible to uniformly and efficiently supply the coating liquid to the entire inner surface of the base material. That is,
For example, a coating liquid can be supplied on a return path to a location where no coating liquid was supplied on the outward path. When the coating liquid is discharged from a large number of coating liquid supply ports arranged at intervals and the coating liquid is supplied linearly to the inner surface of the base material, the number of linear coating liquids is doubled, and the linear coating liquid is increased. Since the interval between the coating liquids becomes half, the supply of the coating liquid can be performed uniformly and efficiently. [Shielding Material] The shielding material is disposed between a discharge path of the coating liquid discharged from the coating liquid supply unit and a portion of the base material where the coating liquid needs to be prevented from adhering.

When the coating liquid supply unit reciprocates, there is a possibility that the coating liquid adheres to the upper end surface or the inner wall of the outer peripheral wall of the substrate near the end of the reciprocating movement. In some cases, it is necessary to prevent the coating liquid from adhering to a part of the outer periphery of the central surface inside the outer peripheral wall. Therefore, the shielding member is disposed between the reciprocating coating liquid supply unit and the outer peripheral wall. As the material of the shielding material, a material that can block the passage of the coating liquid, such as a metal, a synthetic resin, glass, and ceramic, is used.

If the surface of the shielding material is inclined such that the end located on the inner side of the base material is higher than the side located on the outer peripheral wall side, the surface of the shielding material falls. The applied coating liquid can be smoothly guided to the outside of the substrate along the inclined surface of the shielding material. The coating liquid discharged from the coating liquid supply unit falls while moving in the movement direction of the coating liquid supply unit because inertial force accompanying the movement of the coating liquid supply unit is applied. Therefore, when the coating liquid supply unit is moving, the falling path of the coating liquid is skewed in the moving direction.

Therefore, when the coating liquid falls vertically downward from the coating liquid supply section, a shielding member may be arranged just above the place where the coating liquid is prevented from adhering. In addition, it is necessary to change the position where the shielding material is arranged in consideration of the falling angle of the coating liquid. Depending on the situation, even if the discharge path of the coating liquid discharged from the coating liquid supply unit changes, the coating liquid can be reliably prevented from adhering to outside the specified range and supplied to the required range. Then, a part or the whole of the shielding material is moved between an advanced position where the inner front end of the shielding material advances inside the outer peripheral wall and a retreated position which retreats toward the outer peripheral wall.

When the coating liquid supply section moves in a direction approaching the outer peripheral wall of the substrate, the falling path of the coating liquid is inclined in the moving direction of the coating liquid supply section, so that only the upper part of the outer peripheral wall is provided. Is covered with the shielding material, the coating liquid may adhere to the inner wall of the outer peripheral wall and the like. Therefore, if the shielding material is advanced to a position covering the upper part of the outer peripheral wall to the inner part near the outer peripheral wall, the adhesion of the coating liquid to the inner wall of the outer peripheral wall can be reliably prevented.

Here, the specific advance position of the shielding material is geometrically determined by the inclination angle of the falling path of the coating liquid determined by the moving speed of the coating liquid supply section and the positional relationship between the coating liquid supply section and the outer peripheral wall. It is possible to make a prediction or perform an experiment in advance to make a prediction. When the coating liquid supply unit moves away from the outer peripheral wall of the base material, the movement speed is low because the coating liquid supply unit has just started moving, and the falling path of the coating liquid is almost directly below or slightly inclined. It is only about. At this time, if the shielding material is at the above-mentioned advanced position, a part of the central surface near the outer peripheral wall is covered with the shielding material, and the coating liquid is not supplied thereto. Therefore, at this time, the shielding member is retreated to a position covering only the upper part of the outer peripheral wall. What is necessary is just to arrange | position the inner edge of a shielding material in the substantially same position as the inner edge of an outer peripheral wall.

As described above, the advancing or retreating of the shielding material is performed in accordance with the moving state of the coating liquid supply section, so that the portion of the base material where the supply of the coating liquid is required is surely coated. Where the liquid must be supplied to prevent adhesion of the coating liquid, the adhesion of the coating liquid can be reliably prevented. [Coating liquid receiving tank] The coating liquid receiving tank is arranged in a position and a structure where the coating liquid dropped on the shielding material can be collected. Usually, it is arrange | positioned outside the edge part of the base material in which a shielding material is arrange | positioned. The coating liquid collected in the coating liquid receiving tank may be discarded, but it is preferable that the coating liquid is again sent to the coating liquid supply unit and recycled. Therefore, it is preferable that the coating liquid receiving tank and the coating liquid supply unit are connected by a coating liquid circulating means including a pipe, a pump, a filter for preventing foreign matter from being mixed, and the like. [Removal of coating liquid from shielding material] The coating liquid that has fallen on the shielding material can be collected in the coating liquid receiving tank by the action of gravity.
Depending on the viscosity and adhesion of the coating liquid, the coating liquid may be deposited on the shielding material or solidified while being attached.

Therefore, it is desired to quickly remove the coating liquid that has fallen on the shielding material. If the inclination angle of the inclined surface of the shielding material is increased, falling and recovery of the coating liquid is promoted. However, in order to prevent the coating liquid from adhering to the outer peripheral wall or the like, it is better to arrange the shielding material in a plane area as large as possible. If a means for changing the inclination angle is provided by, for example, supporting the shielding material on a turning shaft, the angle of the inclined surface can be changed as necessary.

A cleaning liquid supply unit for cleaning the coating liquid by bringing the shielding material into contact with a cleaning liquid such as water or a solvent can be provided in the coating liquid supply device. The cleaning liquid containing the coating liquid that has washed the shielding material may be collected in a coating liquid receiving tank, or only the cleaning liquid may be collected in a place different from the coating liquid. The shielding member can be provided movably between an operation position when performing a normal coating liquid supply operation and a cleaning position that is provided separately from the operation position and performs cleaning. [Shielding Belt] As a shielding material, an endlessly rotating shielding belt is used. If the inner surface of the lower side of the shielding belt is arranged above the outer peripheral wall so that the coating liquid discharge port can move and pass through the central space of the shielding belt, the coating liquid is received by the inner surface of the lower side of the shielding belt, and the shielding is performed. It can fulfill the function of wood.

If the entirety of the shielding belt or only the inner surface of the lower surface is inclined, the inclined surface of the shielding member described above can be formed. [Shielding Roller] A rotatable shielding roller is used as a shielding material. The rotation direction of the shielding roller is set so that the coating liquid dropped on the peripheral surface of the shielding roller is sent out from the center side of the base material to the outside as the shielding roller rotates. That is, the shielding roller is rotated in a direction in which the peripheral surface moves from a position facing the inside of the base material to a position facing the outside through a position facing upward. The direction of rotation of the shielding rollers disposed at opposite ends of the substrate is opposite to each other.

As the material of the shielding roller, the above-mentioned material of the shielding material is used, and a material having good adhesion of the coating liquid and low adhesion is preferable. [Connection of shielding material] When the coating liquid supply section moves from one end to the other end of the base material, the coating liquid supply section is separated at the end on the starting point side, so that the above-described shielding material is retreated. A step is required, and the coating liquid supply unit approaches at the end on the arrival point side, so that the above-described step of advancing the shielding material is required.

That is, at both ends of the reciprocating motion of the coating liquid supply unit, the shielding material retreating step and the shielding material advancing step are performed in reverse. If the start point and the destination point are interchanged between the forward path and the return path, the execution of the shielding material retreating step and the shielding material advancing step is performed in reverse. Therefore, a pair of shielding members arranged at both ends of the base material are provided with connecting means for connecting such that when one advances toward the inside of the outer peripheral wall, the other retreats, and when the other advances, one retreats. By doing so, the forward and backward movements at both ends are surely reversed.

The connecting means may be a simple bar or beam, and it is sufficient that the shielding members or the supporting structures of the shielding members are physically connected. By connecting the coating liquid receiving tank together with the shielding material by the connecting means and moving integrally with the shielding material, even if the shielding material moves forward and backward, the coating liquid from the shielding material to the coating liquid receiving tank can be reliably collected. I can do it. [Interlocking of Shielding Material and Coating Liquid Supply Unit] As described above, whether the shielding material advances or retreats is determined by the moving direction and the position of the coating liquid supply unit.

Therefore, if the shielding material is advanced and retracted in conjunction with the reciprocating movement of the coating liquid supply unit, the shielding material can be automatically arranged at an appropriate advance / retreat position. As the interlocking means, for example, the coating liquid supply unit or a member that moves integrally with the coating liquid supply unit can be pressed against the shielding material or the support member of the shielding material. In this case, by moving the coating liquid supply unit in a direction approaching the shielding material at the end of the reciprocating motion, the coating material supply unit can push and move the shielding material out. If the above-described connecting means is provided, if the shielding material at one end of the reciprocating motion is retracted, the shielding material at the other end will advance.

As an interlocking means, an operation mechanism for detecting the movement position of the coating liquid supply unit with a sensor or the like and moving the shielding material forward or backward based on the information can be operated. (Interval between the coating liquid supply unit and the substrate) The position where the coating liquid is discharged from the coating liquid supply unit, that is, the coating liquid supply port, at both ends of the reciprocation,
It is necessary to arrange it to some extent above so as not to hit the outer peripheral wall or the shielding material. That is, it is preferable to increase the distance between the base material and the coating liquid supply port.

In the middle of the reciprocating movement of the coating liquid supply section, the shorter the distance from the coating liquid supply port to the inner surface of the substrate, the less the displacement of the falling position due to the inclined falling path of the coating liquid. In addition, the shorter the falling distance of the coating liquid, the less the coating liquid collides with the inner surface of the base material, rebounds to the periphery and adheres to the outer peripheral wall and the like. Therefore, it is effective to change the distance between the coating liquid supply port and the base material according to the situation.

Specifically, it is effective to make the distance between the position where the coating liquid is discharged from the coating liquid supply unit and the base material large at both ends of the reciprocating movement path and small at the center of the movement path. In this case, the base material may be arranged at a fixed position, and the height position of the coating liquid supply unit or the coating liquid supply port may be changed. You may move it up and down. [Arrangement of shielding material] When the coating liquid supply unit reciprocates within the range of the outer peripheral walls at both ends of the base material, the coating liquid does not adhere to the outer peripheral walls on either side. Shielding material is required.

However, when a reversing step is performed at one end of the reciprocating movement of the coating liquid supply unit to reverse the moving direction of the coating liquid supply unit within a range in which the coating liquid is supplied to the inner surface of the base material, Then
Since it is not necessary to cover the outer peripheral wall of the base material with a shielding material, it is not necessary to provide a shielding material. Of course, at the other end of the reciprocation of the coating liquid supply unit, as described above, a shielding material is installed,
The shielding material advancement step and the shielding material exiting step are performed alternately.

The position where the above-described reversing step is performed is a position where the falling position of the coating liquid discharged from the coating liquid supply section on the central plane is the outermost position of the coating liquid supply range. This position is determined by conditions such as the moving speed of the coating liquid supply unit or the inclination angle of the falling path of the coating liquid, and can be obtained by conducting an experiment or calculating theoretically in advance. [Movement of substrate or coating liquid supply device] As the supply operation of the coating liquid, when supplying the coating liquid to a large number of substrates sequentially, or supplying a plurality of coating liquids to one substrate sequentially There are cases.

When a coating liquid is supplied to a large number of substrates, the substrates are sequentially fed into a coating liquid supply device installed at a fixed position, and the substrates supplied with the coating liquid are sequentially carried out. can do. A carrier such as a usual conveyor is used for feeding and carrying out the substrate. The coating liquid supply operation may be performed by a coating liquid supply device that moves together with the substrate while transporting the substrate by a conveyor or the like.

In addition to the coating liquid supply device, devices for performing various operations on the substrate, such as a coating liquid drying and curing device and a pattern forming device, are arranged in the order of the operation steps along the substrate conveying path. You can keep. Each device is freely movable between a work position on the base material and a standby position away from the base material so that a plurality of types of the devices are sequentially arranged with respect to the base material arranged at a fixed position. Can be arranged.

In the case of the coating liquid supply device, there is provided a moving means for moving between a working position arranged over the base material and a standby position arranged apart from the base material. . As the moving means, various moving means similar to a normal mechanical device are employed.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The coating liquid supply apparatus shown in FIG. 1 is an apparatus for supplying a coating liquid 20 as a phosphor material to the inner surface of a front panel 10 for a cathode ray tube. [Front Panel] The front panel 10 is a component constituting a cathode ray tube for a color TV, and is entirely formed of transparent glass. The overall shape of the front panel 10 is a deep dish with a substantially rectangular planar shape and rounded corners at four corners. At the center of the front panel 10, there is a central surface 12 having a concave shape gently curved from the center to the outer periphery, and an outer peripheral wall 14 erected perpendicularly to the outer periphery of the central surface 12. Center plane 12
Constitute a TV screen, and the outer peripheral wall 14 is joined to a cathode ray tube main body (not shown) to assemble the cathode ray tube.

The front panel 10 is appropriately held by holding means.
It is held in place with its inner surface facing up. [Structure of Apparatus] Above the front panel 10, an apparatus main body 40 of the coating liquid supply apparatus is disposed. In the device body 40,
It has a belt mechanism 34 that rotates endlessly in a direction parallel to one side of the front panel 10. The belt mechanism 34 rotates forward and backward.
The coating mechanism supply unit 30 is supported by the belt mechanism 34.
The coating liquid supply unit 30 has an arm shape extending in a direction perpendicular to the moving direction of the belt mechanism 34, and moves in parallel across the upper part of the front panel 10.

A coating liquid discharge port 32 is provided below the coating liquid supply section 30.
Is arranged. The coating liquid supply section 30 includes an apparatus main body section 40.
Alternatively, the coating liquid 20 is supplied from outside, and is discharged downward from the coating liquid discharge port 32. The coating liquid 20 discharged from the coating liquid discharge port 32 falls on the central surface 12 of the front panel 10 to form the coating film 22. During operation of the coating liquid supply device, the coating liquid 20 is continuously discharged from the coating liquid discharge port 32.

The coating liquid discharge port 32 is provided in a direction perpendicular to the moving direction of the belt mechanism 34 and the coating liquid supply unit 30 (FIG. 1).
In the direction perpendicular to the plane of the drawing), and discharges the coating liquid 20 in a curtain shape or a drip shape over the entire width of the front panel 10. Shield mechanisms 50a and 50b are provided near the outer peripheral wall 14 of the front panel 10 at both ends in the movement direction of the coating liquid supply unit 30, respectively. Shielding mechanism 5
0a and 50b are integrally connected by a connecting arm 52. The shielding mechanisms 50a, 5 integrally connected by the connecting arm 52
Reference numeral 0b is supported by the apparatus main body 40 so as to be movable in parallel with the moving direction of the coating liquid supply unit 30.

The shielding mechanism 50a, 50b has a pushing piece 5
4 The pushing piece 54 is provided on the movement path of the coating liquid supply unit 30, and when the outer edge of the coating liquid supply unit 30 abuts, the shielding mechanism unit 5 is moved according to the movement of the coating liquid supply unit 30.
0a or 50b is pushed outward. When one of the shield mechanisms 50a or 50b is pushed outward, the other shield mechanism 50b or 50a integrally connected by the connecting arm 52 also moves in the same direction.

The shielding mechanisms 50a and 50b are provided with shielding rollers 60. The shielding roller 60 is driven to rotate by a motor (not shown) or the like. The shielding roller 60 is disposed below the coating liquid supply port 32 and above the outer peripheral wall 14 of the front panel 10. However, the above-mentioned shielding mechanisms 50a, 50b
Of the outer peripheral wall 14 and the outer peripheral wall 1
4 and move to a position inside the front panel 10. In FIG. 1, the shielding roller 60 arranged on the left side of the front panel 10 is arranged inside the outer peripheral wall 14,
The shielding roller 60 arranged on the right side of the front panel 10
It is arranged almost directly above the outer peripheral wall 14.

Outside the shielding roller 60, the shielding roller 6
0 is provided with a scraper piece 62 which can be freely contacted with the outer peripheral surface. The scraper piece 62 has a function of scraping off the coating liquid attached to the shielding roller 60. A coating liquid receiving tank 64 is provided on the outside of the front panel 10 from below the shielding roller 30 and the scraper piece 62. The coating liquid receiving tank 64 has a receiving piece 66 protruding above the outer peripheral wall 14 from outside the outer peripheral wall 14. The distal end of the receiving piece 66 is disposed below the shielding roller 30 and has a slope that becomes lower from the inner distal end toward the outer side.
Along with the movement of the above-mentioned shielding mechanisms 50a and 50b, the receiving piece 66 moves from a position where the tip thereof is disposed substantially at the inner edge of the outer peripheral wall 14 to a position where it is disposed slightly inside the outer peripheral wall 14. . [Operation of Device] Operation at Exit Position In FIG. 1, the right shielding mechanism 50 b of the shielding mechanisms 50 a and 50 b arranged on the left and right of the front panel 10.
The operation will be described from the state in which is disposed closer to the outside, the shielding roller 30 is disposed at the retreat position, and the coating liquid discharge port 32 of the coating liquid supply unit 30 is disposed on the right end side of the reciprocating motion.

As shown in FIG. 2, the coating liquid 20 discharged from the coating liquid discharge port 32 at the position I where the coating liquid discharge port 32 is disposed on the shielding roller 60 falls onto the shielding roller 60. . The shielding roller 60 is rotated clockwise in the figure such that the peripheral surface moves from a position facing the center of the base material 10 to a position facing the outside of the base material 10 on the upper side thereof. Therefore, the coating liquid 20 that has fallen on the shielding roller 60 is
After being transported to the outside of the base material 10 on the upper surface side of the base material 10, it is dropped from the shielding roller 60, dropped on the coating liquid receiving tank 64 or the receiving piece 66 and collected.

When the supply of the coating liquid 20 to the front panel 10 is not performed, the coating liquid discharge section 30 and the coating liquid discharge port 32 are always kept at the position I. Thereby, the shielding roller 60 is constantly wet with the coating liquid 20 discharged from the coating liquid discharge port 32, and the coating liquid 20 adhered to the shielding roller 60 can be prevented from being dried or fixed. .

Next, the coating liquid discharge port 32 starts to move and II
When it reaches the position, the coating liquid 20 falls almost vertically downward just inside the shielding roller 30, and the center surface 1 of the front panel 10
At 2, it is supplied just inside the outer peripheral wall 14. At this time, the coating liquid discharge unit 30 and the coating liquid discharge port 32 are not yet substantially moved, or the moving speed is not so high.

Next, the coating liquid discharge port 32 is connected to the front panel 10.
When the coating liquid 20 is supplied while moving to the center side (left side in the figure), a coating film 22 is formed on the center surface 12. However, as shown in the position III, when the coating liquid discharge port 32 discharges the coating liquid 20 while moving at a constant speed, the falling path of the coating liquid 20 is inclined vertically forward rather than vertically downward. The reason can be explained as follows.

As shown in FIG. 3, when one drop of the coating liquid droplet 24 drops from the coating liquid discharge port 32 at the position I during the movement, the inertia force of the movement is also applied to the coating liquid particle 24. The liquid droplet 24 has a horizontal motion component in addition to a vertically downward motion component. When the coating liquid discharge port 32 moves to the position II, the coating liquid particles 24 that have fallen obliquely over a certain distance have also moved horizontally to almost the same position as the coating liquid discharge port 32. It is needless to say that the same phenomenon occurs even with a continuous coating liquid flow instead of the coating liquid particles 24.

Accordingly, the falling path of the coating liquid 20 discharged from the moving coating liquid discharge port 32 is not vertically below but vertically obliquely as shown at the position III in FIG. The inclination angle of the falling path of the coating liquid 20 differs depending on the moving speed of the coating liquid discharge port 32. When the coating liquid discharge port 32 is stopped, the inclination angle is 0, that is, the vertical direction is downward. When the moving direction of the outlet 32 is reversed, the inclination angle of the falling path of the coating liquid 20 is also reversed.

Operation at the Advance Position As shown in FIG. 4, when the coating liquid discharge port 32 approaches the outer peripheral wall 14 on the opposite side of the front panel 10, the shielding roller 60 And coating liquid receiving tank 64
Receiving piece 66 is disposed. That is, the shielding roller 6
0 is in the advanced state.

Since the falling path of the coating liquid 20 discharged from the coating liquid discharge port 32 at the position I is inclined obliquely forward, it passes just inside the shielding roller 60 and is deeper than the position of the shielding roller 60. , And falls on the central surface 12 just inside the outer peripheral wall 14. The coating film 22 is formed inside this position. When the coating liquid discharge port 32 moves outside the position I, the coating liquid 20 falls on the surface of the shielding roller 60. Shield roller 6
0 rotates so that the surface moves from below to above on the inside and moves from above to below on the outside (counterclockwise in FIG. 4). The coating liquid 20 that has dropped onto the surface of the shielding roller 60 is moved from inside to outside with the rotation of the shielding roller 60, and falls downward from the shielding roller 60 outside the shielding roller 60.
As shown in the position II, the coating liquid 20 falls from the coating liquid discharge port 32 to the shielding roller 60, and is collected from the shielding roller 60 to the coating liquid receiving tank 64 via the receiving piece 66 disposed below the shielding roller 60. .

Therefore, the coating liquid discharge port 32 is
The coating liquid 20 moves from the upper side to the outer side.
4 is reliably prevented from adhering to the inside or the upper end surface.
In particular, even if the falling path of the coating liquid 20 is inclined obliquely forward, the shielding roller 60 and the receiving piece 66 are disposed inside the outer peripheral wall 14 by that much, so that the center just before the outer peripheral wall 14 is located. The coating liquid 20 can be reliably supplied only to the surface 12.

In the state shown in FIG. 1, when the coating liquid discharge port 32 and the coating liquid discharge section 30 are further moved to the outside of the front panel 10, the coating liquid discharge section 30 is moved by the pushing piece 54 of the shielding mechanism 50a.
Abut. As a result, the entirety of the shielding mechanism 50a moves to the left in the figure. In FIG. 4, the shielding roller 60, the receiving piece 66, and the coating liquid receiving tank 64 move to the left in the drawing, and the inner ends of the shielding roller 60 and the receiving piece 66 are arranged almost directly above the outer peripheral wall 14. Leave. This state is shown in FIG.
Is the same as the arrangement relationship between the shielding roller 60 and the receiving piece 66 and the outer peripheral wall 14 shown in FIG.

When the shielding mechanism 50a moves, the connecting arm 5
The opposite shielding mechanism 50b connected by 2 also moves.
In FIG. 2, the shielding roller 60 and the receiving piece 66 move to the left side in the drawing, and the shielding roller 60 enters a state in which the shielding roller 60 advances inside the outer peripheral wall 14. After the coating liquid discharge unit 30 comes into contact with the pushing piece 54 of the shielding mechanism unit 50a and the shielding mechanism unit 50a is moved, the belt mechanism 34 rotates in the reverse direction, and the coating liquid discharge unit 30 moves in the opposite direction. First, the same process as described above is performed. The coating liquid 20 discharged from the coating liquid discharge port 32 is again supplied onto the central surface 12 of the front panel 10 to form the coating film 22.

By repeating the above steps, a required amount of the coating liquid 20 is supplied to the entire central surface 12 of the front panel 10. The supply range of the coating liquid 20 is precisely limited to a predetermined range of the center surface 12 of the front panel 10, and is applied to a place where the coating liquid 20 must be prevented from adhering, such as the inner wall and the upper end of the outer peripheral wall 14. The adhesion of the liquid 20 can be reliably prevented. In particular, as described above, even if the falling path of the coating liquid 20 is an inclined path inclined according to the moving direction and the speed of the coating liquid discharge port 32, the shielding mechanism 50b including the shielding roller 60 and the receiving piece 66 does not By moving forward and backward to an appropriate position in accordance with the movement of the liquid discharge unit 30, the coating liquid 20 can be supplied to the above-described appropriate range. [Operation of Scraper] As shown in FIG.
At 0, the tip of the scraper piece 62 is arranged so as to be able to abut.

As described above, the coating liquid 20 is
When there is a possibility that the scraper piece may fall on zero, the scraper piece 62 is arranged at a position away from the shielding roller 30. When the coating liquid discharge port 32 is separated from above the shielding roller 30 toward the inside of the front panel 10, the scraper piece 62
Is pressed against the surface of the shielding roller 30. Then, the coating liquid 20 fixed on the surface of the shielding roller 30 is scraped off by the scraper piece 66 and falls off from the shielding roller 30.

By the action of the scraper pieces 66, dirt of the coating liquid 20 does not adhere to the surface of the shielding roller 30, and the coating liquid 20 can be collected smoothly along the surface of the shielding roller 30. In addition, scraper piece 6
2 may be kept in contact with the shielding roller 30 at all times. In this case, the coating liquid 20 that has fallen on the shielding roller 30 is scraped off from the contact position with the scraper piece 62 toward the scraper piece 62, and is dropped and collected along the inclination of the scraper piece 62 into the coating liquid receiving tank 64. You. Since the surface of the shielding roller 30 that has passed the position of the scraper piece 62 has little coating liquid 20 attached thereto, the surface of the shielding roller 30 is always clean and can receive the coating liquid 20 falling from the coating liquid supply port 32. .

Further, instead of the scraper piece 66, means such as a roller for removing the coating liquid 20 from the shielding roller 30 may be provided, or the coating liquid 20 may be naturally dropped from the shielding roller 30 and collected. . [Conveying Apparatus] When the coating liquid supply device supplies the coating liquid 20 to a large number of front panels 10, the front panel 10 is sequentially carried in to a position below the apparatus main body 40, and the coating liquid 2 is supplied.
The front panel 10 to which the “0” is supplied is carried out to another place, and a large number of the front panels 10 are sequentially arranged, and the apparatus main body 40 is moved so that another front panel 1 is sequentially arranged.
Any of the methods of arranging above 0 is adopted.

When a plurality of color phosphor coatings are formed on one front panel 10, a plurality of types of coating liquids 20 are sequentially supplied. In this case, the color of the coating liquid 20 to be supplied may be changed in one apparatus main body 40, but the plurality of apparatus main bodies 40 having different colors of the supplied coating liquid 20 are They can be arranged sequentially.

The transport device shown in FIG. 5 and FIG. 6 applies a three-color phosphor liquid for a color TV to the front panel 10 with a coating liquid 20.
It is a device supplied as. The front panel 10 is held by a holding member 110 and transported in a horizontal direction by a transport mechanism 112. As shown in FIG. 6, the holding member 110 moves along a large arc-shaped path.

As shown in FIG. 5, the apparatus main body 4
The device unit 100 in which 0 is stored is supported by a support base 104 via a parallel crank mechanism 102. When the parallel crank mechanism 102 operates, the device unit 10
No. 0 reciprocates between a position above the holding member 110 on which the front panel 10 is mounted and a position distant to the side of the holding member 110 and the transport mechanism 112.

As shown in FIG. 6, three device units 100a to 100c are arranged at regular intervals along the arc-shaped movement path of the front panel 10. Each device unit 10
0 a to c supply phosphor liquids of different colors as the coating liquid 20. Front panel 1 held by holding member 100
0 sequentially moves to a position arranged below each of the device units 100a to 100c. When the front panel 10 is disposed at a predetermined position, the device units 100a to 100c are disposed so as to cover the upper part of the front panel 10, and the above-described supply step of the coating liquid 20 is executed.

Front panel 1 supplied with one color coating liquid 20
0 moves to a position where the next coating liquid 20 is supplied after the device units 100a to 100c are withdrawn from above. By repeating such steps sequentially, the coating liquids 20 of a plurality of colors can be sequentially supplied to the front panel 10. After the one-color coating liquid 20 is supplied to the front panel 10, various steps necessary for forming the phosphor film can be performed before the process proceeds to the step of supplying the next-color coating liquid 20.

That is, the front panel 10 is rotated in a horizontal plane by centrifugal force so that the coating liquid 20 or the coating film 22 supplied to the central surface 12 of the front panel 10 forms a film with a uniform thickness over the entire surface. A step of homogenizing the coating liquid 20, a step of drying and curing the coating film 22, and a step of drying and curing the coating film 22
For pattern processing into a dot shape or a stripe shape.

After the supply step of the one-color coating liquid 20 is completed, the above steps may be performed by moving and disposing the device unit for executing each step at that location, or may be performed at another location. The front panel 20 may be transported to the device unit. If the transport method or the apparatus as in the above embodiment is used, the operation of forming the phosphor films of a plurality of colors on the front panel 10 can be performed with high production efficiency, including the step of supplying the coating liquid 20. [Another Embodiment of the Coating Liquid Discharge Unit 30] The coating liquid discharge unit 30 shown in FIG. 7 has an arm shape crossing the entire width of the front panel 10 and has a coating liquid flow along the axial direction inside. A road 134 is provided. The lower surface of the arm-shaped coating liquid discharge unit 30 is
A plurality of coating liquid discharge ports 132 are provided in a staggered arrangement in a row, and each coating liquid discharge port 132 communicates with a coating liquid flow path 134. The coating liquid 20 supplied to the coating liquid flow path 134 falls downward from each coating liquid discharge port 132 and is supplied onto the central surface 12 of the front panel 10.

As shown in FIG. 7A, the coating liquid 20 supplied to the central surface 12 forms a number of parallel coating liquid lines 26. However, the coating liquid 20 constituting the coating liquid line 26 spreads to both sides with the passage of time, and the coating liquid lines 26 are connected to each other to form an integral planar coating film 22. When the coating liquid discharge ports 132 are arranged in a staggered manner as in the above-described embodiment, the distance between the adjacent coating liquid discharge ports 132 in the axial direction of the coating liquid discharge section 130 can be reduced.

That is, the interval between the coating liquid discharge ports 132 has a certain limit due to restrictions such as processing accuracy and structural strength. Therefore, when the coating liquid discharge ports 132 are simply arranged linearly, the interval between the coating liquid lines 26 cannot be reduced too much, and the density of the coating liquid lines 26 becomes coarse. Coating liquid line 2
If the density of the coating liquid 6 is low, the amount of the coating liquid 20 that can be supplied in a certain period of time decreases, or it takes time for the coating liquid line 26 to flow and become a uniform planar coating film 22.

Therefore, the coating liquid discharge ports 132 are arranged in a staggered manner, and if the distance between the supplied coating liquid lines 26 in the axial direction can be reduced, the density of the coating liquid lines 26 is increased, and the supply of the coating liquid 20 is performed. In addition, the formation of the coating film 22 can be made more efficient. [Another embodiment of coating liquid supply] In the embodiment shown in FIG.
The arm-shaped coating liquid supply unit 130 having a large number of coating liquid supply ports 132 on the lower surface along the axial direction is swung in a direction parallel to the axis while moving in the direction perpendicular to the axis.

In this case, the formed coating liquid line 26 is meandering right and left and is formed in a curved shape. According to the above embodiment,
By forming the meandering coating liquid line 26, the total length of the coating liquid line 26 formed within a certain area, that is, the supply amount of the coating liquid 20, is increased as compared with the linear coating liquid line 26. Further, the coating liquid line 26 spreads right and left to form the planar coating film 22 more quickly.

As a result, the supply of the coating liquid 20 and the coating film 22
Can be formed more efficiently. In the embodiment shown in FIG. 8, the semicircular trajectory forms the coating liquid line 26 which is continuous alternately from front to back. However, the coating liquid line is formed into various curves such as a sine curve or a bent line such as a sawtooth. It is also possible to form 26. [Another Embodiment of Shielding Mechanism] In the embodiment shown in FIG. 9, a shielding plate 68 is used instead of the shielding roll in the above embodiment.
Is used.

On both sides of the front panel 10, there are provided shielding plates 68 which are inclined so as to become lower toward the outside.
The outer edge of the shielding plate 68 is disposed above the coating liquid receiving tank 64. The lower ends of the left and right coating liquid receiving tanks 64 are integrally connected by a connecting arm 52. A position where the tip of the shielding plate 68 protrudes inward from the outer peripheral wall 14 of the front panel 10, and
It advances and retreats alternately between a position located on the substantially inner edge of the outer peripheral wall 14.

Therefore, when the coating liquid 20 discharged from the coating liquid discharge port 32 falls on the shielding plate 68, the coating liquid 20 flows along the slope of the shielding plate 68 and flows on the coating liquid receiving tank 64.
Will be collected. By moving the inner end of the shielding plate 68 forward and backward, the coating liquid 20 adheres to the inner wall and the upper end of the outer peripheral wall 14 irrespective of the difference in the falling path of the coating liquid 20 depending on the movement direction and the speed of the coating liquid supply port 32 described above. The coating liquid 20 can be reliably supplied only to a predetermined range of the central surface 12 of the front panel 10 without performing.

As shown in FIG. 10, the shielding plate 68 is attached so as to be able to pivot vertically about a pivot 69. In the normal use state described above, the shielding plate 68
Are arranged in an inclined state in which the front end facing the inside of the front panel 10 is slightly higher. From the state of use, the tip inside the shielding plate 68 can be lifted even higher. When the tip of the shielding plate 68 is greatly lifted, the shielding plate 6
The coating liquid 20 remaining on and adhered to the surface of the coating liquid 8 is quickly dropped by the action of the weight and collected in the coating liquid receiving tank 64.

Therefore, when the coating liquid supply port 32 is arranged above the shielding plate 68 and the coating liquid 20 falls, the shielding plate 68 is set to a gentle inclination state so that the coating liquid supply port 32 is Once moved to a position away from above, the inclination angle of the shielding plate 68 can be increased, and the coating liquid 20 remaining on the shielding plate 68 can be quickly collected. As a result, it is possible to prevent the coating liquid 20 remaining on the shielding plate 68 from dripping from the tip of the shielding plate 68 to stain the inside of the front panel 10 and adhere to the inner wall and upper end of the outer peripheral wall 14. [Cleaning of Shielding Plate] The embodiment shown in FIG. 11 is a technique for cleaning the coating liquid 20 remaining or adhering to the surface of the shielding plate 68.

A shielding plate 68 arranged along one side of the front panel 10 is supported movably along the axis of the pivot 69. The cleaning liquid supply unit 70 is disposed above the shielding plate 68 that has moved to the side position of the front panel 10. The cleaning liquid 72 is sprayed from the lower surface of the cleaning liquid supply unit 70 onto the shielding plate 68 in a shower shape. As the cleaning liquid, water or a solvent that dissolves the coating liquid 20 is used.

The cleaning solution 72 sprayed on the shielding plate 68
Is the coating liquid 20 remaining or adhered to the surface of the shielding plate 68.
Wash off. A recovery tank and a recovery path for the cleaning liquid are provided below the shielding plate 68 on which the cleaning liquid 72 falls. The cleaning liquid 72 can be collected in the coating liquid receiving tank 64. Cleaning liquid supply unit 7
While the cleaning liquid 72 is being discharged from the front panel 10, the shielding plate 68 is moved from the position arranged on one side of the front panel 10 to the front panel 1.
After returning to the original position on one side of the front panel 10 through the position arranged on the side distant from the side of 0, each part of the shielding plate 68 is reciprocated twice with the cleaning liquid 72 twice. Thus, the coating liquid 20 adhered to the surface of the shielding plate 68 can be efficiently removed. [Embodiment Using Shielding Belt] In the embodiment shown in FIGS. 12 and 13, a shielding belt 160 is used instead of the shielding plate 68 of the above embodiment.

The shielding belt 160 is disposed endlessly rotatable along a substantially rectangular path along the opposite sides of the front panel 10 above the outer peripheral wall 14. Shield belt 16
Drive rollers 162 are provided inside the four corners of 0. As shown in FIG. 12, the lower side of the shielding belt 160 is
It is arranged in an inclined state such that it is high inside 0 and low outside. Although not shown, the left and right shielding belts 160 have their support structures integrally connected by the connecting arms 52 and the like. Therefore, in a state where the shielding belt 160 has advanced to the inside of the front panel 10 on one of the opposing sides of the front panel 10, the inner end of the shielding belt 160 is near the inner edge of the outer peripheral wall 14 on the other side. Will be placed in the

The coating liquid discharge port 32 moves to the inside of the shielding belt 160. Coating liquid 2 discharged from coating liquid discharge port 32
0 falls on the upper surface of the lower side of the shielding belt 160 and is collected in the coating liquid receiving tank 64. In the above embodiment, the shielding belt 1
By the endless rotation of the coating liquid 60, the surface portion on which the coating liquid 20 dropped from the coating liquid discharge port 32 adheres sequentially moves, and the coating liquid 2
While moving away from the drop position of 0, the shielding belt 160
And flows into the coating liquid receiving tank 64 along the inclination of. Coating liquid 2
0 always falls on a new surface portion of the shielding belt 160. As a result, a large amount of the coating liquid 2
It is possible to prevent zeros from remaining and the coating liquid 20 from sticking.

The cleaning liquid supply unit 70 shown in FIG. 11 can be combined with the shielding belt 160 of the above embodiment. The shielding belt 160 is extended further outside than the entire length of the side of the front panel 10, and
If the cleaning liquid 72 is supplied from the cleaning liquid supply unit 70 outside the 60 and the inner surface of the shielding belt 160 is cleaned, the adhesion of the coating liquid 20 to the shielding belt 160 can be more reliably prevented.

If the mounting structure of the shielding belt 160 is rotatable in the vertical direction so that the inclination angle of the lower side of the shielding belt 160 can be changed, the shielding plate 68 in the embodiment of FIG. The same function as that for promoting the collection of the coating liquid 20 can be exhibited. [Another Embodiment of Supplying Coating Liquid] In the embodiment shown in FIGS. 14 and 15, the shielding roll 60 is disposed only at one end of the front panel 10.

The shielding roll 60 and the coating liquid receiving tank 64 are integrally provided with a reciprocating mechanism such as a cylinder mechanism and a ball screw mechanism so as to reciprocate with respect to the outer peripheral wall 14 of the front panel 10. The movement of the shielding roll 60 and the like is controlled in conjunction with the movement of the coating liquid discharge unit 30 and the coating liquid discharge port 32. The coating liquid discharge unit 30 and the coating liquid discharge port 32 move from the end on the side where the shielding roll 60 is disposed to near the opposite end, and then make a U-turn before the position of the outer peripheral wall 14, It returns to the installation side of the shielding roll 60 again.

The stage in which the coating liquid discharge port 32 starts from the side where the shielding roll 60 is arranged is the same as the state shown in FIG. That is, the shielding roll 60 is at the retreat position, and the supply of the coating liquid 20 discharged from the coating liquid discharge port 32 is started from the central surface 12 immediately inside the outer peripheral wall 14.
The coating liquid outlet 32 moves and passes through the position II, and the front panel 10
At the position III slightly before the inner edge position of the outer peripheral wall 14 of the coating liquid 20, the falling path of the coating liquid 20 is inclined.
Numeral 0 denotes the outer edge of the central surface 12 and falls to a position near the inner edge of the outer peripheral wall 14. Since there is no need to supply the coating liquid 20 outside this position, the movement of the coating liquid discharge port 32 is reversed. The position III where the coating liquid discharge port 32 is inverted is
The falling path of the coating liquid 20 is measured or calculated on the basis of the moving speed of.

The coating liquid discharge port 32 moves from the position III to the position V from the position IV. At this time, the falling path of the coating liquid 20 is inclined toward the moving direction. Coating liquid 2 at V position
At a stage where 0 is supplied to the outermost side of the central surface 12, the shielding roll 60 is disposed at the advanced position. Coating liquid discharge port 3
When 2 moves further and reaches the VI position, the coating liquid 20 falls on the shielding roll 60 and is collected in the coating liquid receiving tank 64.

The coating liquid discharge section 30 is movable in its axial direction, that is, in a direction orthogonal to the reciprocating movement of the coating liquid discharge section 30. When the coating liquid discharge port 32 reaches the U-turn position, the coating liquid discharge section 30 is moved to the coating liquid discharge port 3.
2 is moved by about a half pitch of the axial arrangement interval.
Therefore, as shown in FIG. 15, the coating liquid line 26 formed by the coating liquid 20 discharged from the coating liquid discharge port 32 draws a U-shaped trajectory according to the moving path of the coating liquid discharge port 32.

In the above embodiment, since the shielding mechanism 50 such as the shielding roll 60 may be installed only on one end of the front panel 10, the apparatus can be simplified. When the coating liquid supply operation is on standby due to replacement of the front panel 10 or the like, the coating liquid discharge unit 30 and the coating liquid discharge port 32 are arranged on the shielding roll 60 so that the shielding roll 60 constantly receives the coating liquid 2.
At 0, it can be made wet to prevent drying and sticking.
If the shielding rolls 60 are provided at both ends of the front panel 10, the coating liquid discharge port 32 cannot be arranged for one of the shielding rolls 60, so that the applied coating liquid 20 is dried and adhered.

By moving the coating liquid discharge ports 32 in the axial direction, the coating liquid lines 26 can be formed at intervals smaller than the arrangement intervals of the coating liquid discharge ports 32, and the uniform coating film 22 can be efficiently formed. Can be formed. A method of moving the coating liquid discharge unit 30 and the coating liquid discharge port 32 by a predetermined distance in the axial direction in the reciprocating path of the coating liquid discharge unit 30 is as follows.
The present invention can be applied to devices that are arranged at both ends. [Embodiment for Changing the Height of the Coating Liquid Discharge Port] In the embodiment shown in FIG. 16, the height of the entire coating liquid discharge section 30 or only the coating liquid discharge port 32 can be changed vertically. Specifically, the coating liquid discharge unit 30 is attached to the belt mechanism 34 so as to be able to move up and down.

[0091] The coating liquid 20 is discharged while moving the coating liquid discharge port 32 from one end of the front panel 10 to the other end, as in the above embodiment. However, at the same time as the horizontal movement of the coating liquid discharge port 32, the height of the coating liquid discharge port 32 is different between the vicinity of both ends and the central portion, as shown by a movement trajectory by a solid line in FIG. That is, when the coating liquid discharge port 32 is arranged near the upper part of the shielding roll 60,
The coating liquid discharge port 32 is arranged at a position considerably higher than the upper end of the zero. As a result, the coating liquid discharge port 32 is
And the coating liquid 20 splashed by the shielding roll 60 is prevented from adhering to the member on the coating liquid discharge port 32 side.

When the coating liquid discharge port 32 moves inside the front panel 10 from the position of the shielding roll 60 and moves above the center plane 12, the coating liquid discharge port 32 is moved to a position considerably lower than the shielding roller 60. Lower the distance of the central surface 12 from the surface. As a result, it is possible to prevent the coating liquid 20 falling from the coating liquid discharge port 32 from accelerating during the falling and colliding on the central surface 12 to be largely scattered and attached to the outer peripheral wall 14 and the like. In addition, since the falling path is shortened, the deviation between the position of the coating liquid discharge port 32 and the supply position of the coating liquid 20 due to the inclination of the falling path is reduced, and the setting of the supply range of the coating liquid 20 is facilitated.

When changing the height of the coating liquid discharge port 32, in addition to the step-like movement locus shown by the solid line, a smooth concave curve-like movement locus shown by a two-dot chain line can be taken. If the coating liquid discharge port 32 is moved in a smooth curved shape, the supply state of the coating liquid is less likely to vary depending on the location on the entire central surface 12. The setting of the movement locus as described above can be performed by mechanically changing the height of the coating liquid discharge unit 30 using a cam mechanism or the like. Using a control device such as a computer, the coating liquid ejection unit 30 can also draw a free movement locus. [Another Embodiment of Moving Mechanism of Apparatus Unit] The embodiment shown in FIG. 17 is different from the embodiment shown in FIG.

The apparatus unit 100 in which the apparatus main body 40 and the like are accommodated is attached to the support 120 disposed on the side of the holding member 110 of the front panel 10 so as to be able to move up and down. It has become. The moving table 124 supporting the support column 120 and the elevating cylinder 122 is horizontally movably mounted on the moving rail 126 to a position away from a position adjacent to the holding member 110.

In the above embodiment, the device unit 100 descends from above to the front panel 10 supported by the holding member 100 and is mounted at a predetermined position. Further, after the apparatus unit 100 is moved up, the space above the front panel 10 is completely opened by horizontally moving the movable table 124 to the outside, so that various operations can be easily performed. [Another Embodiment of Shielding Mechanism] The embodiment shown in FIG.
Two sets of the shielding plate 68 and the coating liquid receiving tank 64 are provided.

At a position adjacent to the shielding roller 60, a front shielding plate 68a having the same structure as the scraper piece 62 in the above embodiment, and a first coating liquid receiving tank for collecting the coating liquid 20 falling from the shielding plate 68a. 64a. The rear shielding plate 68b has a part of its tip covered above the front shielding plate 68a, and its rear end side extends further rearward than the positions of the front shielding plate 68b and the first coating liquid receiving tank 64a. The coating liquid 20 that has fallen from the rear shield plate 68b is applied to the first coating liquid receiving tank 64.
The liquid is collected in the second coating liquid receiving tank 64b disposed behind “a”.

The coating liquid discharge port 32 moves from the shielding roller 60 to the rear through the upper part of the front shielding plate 68a and the rear shielding plate 68b. At the position where the coating liquid discharge port 32 has moved to the rearmost position, the coating liquid 20 falling from the coating liquid discharge port 32
Is dropped and collected directly into the second coating liquid receiving tank 64b. In the above embodiment, abrasion powder and the like generated by the contact between the shielding roller 60 and the front shielding plate 68a can be separated and collected.

That is, the front shield plate 68 a is in contact with the outer periphery of the shield roller 60 and the coating liquid 2 fixed to the shield roller 60.
It acts to scrape off solids of zero. At this time, in addition to the solid matter of the coating liquid 20, the surface of the shielding roller 60 may be scraped off to generate abrasion powder. The coating liquid 20 containing such solid matter cannot be circulated to the coating liquid supply unit 30 as it is. A step of removing foreign matter using a filter or the like is required. Particularly, the coating liquid 2 such as the abrasion powder or the like.
Solids composed of components other than 0 need to be removed.

In the above embodiment, since the coating liquid 20 collected from the shielding roller 60 via the front shielding plate 68a to the first coating liquid receiving tank 64a may contain the abrasion powder or the like, the first coating In order to circulate and use the coating liquid 20 collected in the liquid receiving tank 64a, the above-described filter step is required. However, the coating liquid 20 collected from the rear shield plate 68b to the second coating liquid receiving tank 64b does not include the abrasion powder at all. Therefore, the collected coating liquid 20 is used as it is, or only a simple filter process is performed. Just do it and you can recycle it.

If the standby position of the coating liquid discharge port 32 is set behind or above the rear shield plate 68b, the coating liquid 20 discharged from the coating liquid discharge port 32 in the standby state will All are collected in the second coating liquid receiving tank 64b and can be recycled. The coating liquid discharge port 32 is a shielding roller 60
And a small amount of the coating liquid 20 collected in the first coating liquid receiving tank 64a during a relatively short time passing over the front shielding plate 68a.
Only the removal process of the abrasion powder or the like should be performed sufficiently. The process of filtering the coating liquid 20 is simplified. Further, even if a small amount of the coating liquid 20 collected in the first coating liquid receiving tank 64a is discarded, it is not economically large waste. [Another Embodiment Regarding Operation of Coating Liquid Discharge Port] In the embodiment shown in FIG. 19, the operation of the coating liquid discharge port 30 in a standby state is different from that of the above embodiment.

The operation path TA represents the operation of the coating liquid discharge port 30 when the coating liquid 20 is applied to the front panel 10. Move up above 10,
After applying the coating liquid 20 to the front panel 10, the coating liquid 20 linearly moves from the shielding roller 60 on the opposite side to a position above the scraper piece 62.

In the state where the coating liquid discharge port 30 is arranged above the scraper piece 62, inspection work of the equipment is performed until the front panel 10 is taken out or the next front panel 10 is installed. For example, while the coating liquid discharge port 30 is standing by at a position above the scraper piece 62, the discharge of the coating liquid 20 from the coating liquid discharge port 30 is continued.

By continuing the discharge of the coating liquid 20 even in the standby state, clogging of the coating liquid discharge port 30 can be prevented. Operation path TB of coating liquid discharge port 30 in standby state
Moves the coating liquid discharge port 30 back and forth over substantially the entire length from the front end to the rear end of the scraper piece 62. The coating liquid 20 always falls on the upper surface of the scraper piece 62 and is supplied.
And become wet. The coating liquid 20 may also be made to fall from the tip of the scraper piece 62 above the shielding roller 60.

The entire surface of the scraper piece 62 is always coated with the coating liquid 2.
0, the coating liquid 20 on the surface of the scraper piece 62
May remain stuck, or the new coating liquid 20 falling onto the stuck coating liquid 20 may scatter the coating liquid 20 stuck around, or the coating liquid 20 may be dried and hardened on the surface of the scraper piece 62. The problem of doing it can be prevented.

[0105]

According to the method and apparatus for supplying a coating liquid of the present invention,
By reciprocating the coating liquid supply unit that continuously discharges the coating liquid above the substrate, the coating liquid is supplied to the inner surface of the substrate surrounded by the outer peripheral wall, and the coating liquid supply unit is moved. The coating liquid is supplied to the inner surface of the base material without applying the coating liquid to places where the coating liquid should not adhere, such as the outer peripheral wall of the base material, by advancing or retracting the shielding material according to the state. The coating liquid can be reliably supplied to the places where it is necessary.

As a result, it becomes possible to supply the coating liquid to the substrate with good quality performance and efficiently.

[Brief description of the drawings]

FIG. 1 is an overall structural diagram of a coating liquid supply device according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing an operation at one end of the front panel.

FIG. 3 is an explanatory view showing a falling state of a coating liquid.

FIG. 4 is an enlarged sectional view showing an operation at the other end of the front panel.

FIG. 5 is a side view illustrating a transport structure of the entire coating liquid supply device.

FIG. 6 is a plan view illustrating a transport structure of the entire coating liquid supply device.

FIG. 7 is a plan view (a) of a coating liquid supply unit showing another embodiment.
And side view (b)

FIG. 8 is a plan view of a coating liquid supply unit showing another embodiment.

FIG. 9 is an overall structural diagram of a coating liquid supply device showing another embodiment.

FIG. 10 is an enlarged view of a main part showing an operation state of the shielding plate.

FIG. 11 is a perspective view illustrating a cleaning mechanism of a shielding plate.

FIG. 12 is an overall structural diagram of a coating liquid supply device showing another embodiment.

FIG. 13 is a schematic perspective view illustrating a detailed structure of a shielding belt.

FIG. 14 is a front view of a coating liquid supply device showing another embodiment.

FIG. 15 is a plan view of the previous figure.

FIG. 16 is a front view of a coating liquid supply device showing another embodiment.

FIG. 17 is a side view of a coating liquid supply device showing another embodiment.

FIG. 18 is a side view of a coating liquid supply device showing another embodiment.

FIG. 19 is a side view of a coating liquid supply device showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Front panel 12 Center surface 14 Outer peripheral wall 20 Coating liquid 22 Coating film 30 Coating liquid supply part 32 Coating liquid discharge port 34 Belt mechanism 40 Device body part 50a, 50b Shielding mechanism part 52 Connecting arm 54 Pushing piece 60 Shielding roller 62 Scraper Piece 64 coating liquid receiving tank 66 receiving piece 68 shielding plate

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Masataka Yoshida 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Yoshimichi Ishii 1006 Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Inventor Kunihisa Akutsu 1-1, Sachimachi, Takatsuki-shi, Osaka Matsushita Electronics Co., Ltd. F-term (reference) 4F041 AA05 AB01 BA34 BA51

Claims (19)

[Claims] 1. A method for supplying a coating liquid to an inner surface of a substrate surrounded by an outer peripheral wall, wherein the coating liquid supply section is continuously discharged from the coating liquid supply section while the coating liquid supply section is continuously discharged. A coating liquid supply step of reciprocating along the substrate inner surface to supply the coating liquid to the substrate inner surface, and when the coating liquid supply unit has moved in a direction approaching the outer peripheral wall of the substrate. A shielding material advancing step of advancing the shielding material to a position covering from the upper side of the outer peripheral wall to the inner side near the outer peripheral wall, and when the coating liquid supply unit moves in a direction away from the outer peripheral wall of the base material, A shielding material retreating step of retreating the shielding material to a position covering only above the outer peripheral wall. 2. The coating liquid supply method according to claim 1, wherein, at both ends of the reciprocating movement of the coating liquid supply section, mutually opposite steps of the shielding material advancing step and the shielding material retreating step are alternately performed. 3. The method according to claim 1, wherein only one end of the reciprocating motion of the coating liquid supply unit is provided.
The shielding material advancing step and the shielding material retreating step are performed alternately, and at the other end of the reciprocating motion of the coating liquid supply unit, the coating liquid supply unit moves within a range where the coating liquid is supplied to the inner surface of the base material. The coating liquid supply method according to claim 1, further comprising a reversing step of reversing a direction. 4. The coating liquid supply method according to claim 1, wherein the coating liquid supply step reciprocates the coating liquid supply section while meandering in a direction orthogonal to the reciprocating direction. 5. The coating liquid supply step, wherein the distance between the position where the coating liquid is supplied from the coating liquid supply unit and the substrate is large at both ends of the reciprocating movement path and small at the center of the movement path. The coating liquid supply method according to claim 1. 6. The coating liquid supply step according to claim 1, wherein a position at which the coating liquid is supplied to the inner surface of the base material is changed between a forward movement and a return movement of the reciprocating movement of the coating liquid supply unit. 3. The method for supplying a coating liquid according to item 1. 7. The coating liquid supply step supplies a coating liquid from a plurality of coating liquid discharge ports arranged in the coating liquid supply unit at intervals in a direction orthogonal to the direction of the reciprocating motion. 7. The deviation of the position where the coating liquid is supplied between the forward path and the return path is set to substantially half of the interval between the coating liquid discharge ports.
3. The method for supplying a coating liquid according to item 1. 8. An apparatus for supplying a coating liquid to an inner surface of a base material surrounded by an outer peripheral wall, wherein the coating liquid reciprocates along the inner surface of the base material to continuously apply the coating liquid to the inner surface of the base material. A coating liquid supply unit that discharges and supplies the coating material, and a shielding material disposed above and below the outer peripheral wall of the base material in an end direction of the reciprocating motion of the coating liquid supply unit so as to be able to advance and retreat toward the inside of the outer peripheral wall; A coating liquid supply tank that is disposed outside the base material and that receives a coating liquid that falls from the shielding material. 9. The coating liquid supply device according to claim 8, wherein the shielding members are respectively arranged above outer peripheral walls at opposite ends of the base material. 10. A connecting means for connecting the pair of shielding members so that one of them goes out when the one advances toward the inside of the outer peripheral wall and the other goes out when the other advances. 3. The coating liquid supply device according to item 1. 11. The interlocking means, wherein the shielding member moves forward and backward in conjunction with reciprocation of the coating liquid supply unit.
The coating liquid supply device according to any one of the above. 12. The shielding member includes a shielding roller that rotates in a direction in which a peripheral surface moves from a position facing the inside of the base material to a position facing the outside of the base material through a position facing upward. 12. The coating liquid supply device according to any one of items 11 to 11. 13. The shielding material according to claim 8, wherein the shielding member has an inclined surface which becomes lower outward from a position facing the inside of the base material.
3. The coating liquid supply device according to any one of 3. 14. The coating liquid supply device according to claim 13, wherein the inclined surface has a variable inclination angle. 15. The coating liquid supply device according to claim 13, wherein the shielding member is an endlessly rotating shielding belt, and the inclined surface is an inner surface of a lower side of the shielding belt. 16. A moving means for moving the coating liquid supply unit between a work position arranged over the base material and a standby position arranged apart from the base material. The coating liquid supply device according to any one of claims 8 to 15, comprising: 17. The method according to claim 17, wherein the coating liquid supply unit includes a plurality of coating liquid discharge ports arranged at intervals along a direction orthogonal to the direction of the reciprocation, and the coating liquid supply unit is connected to the reciprocating direction. The coating liquid supply device according to any one of claims 8 to 16, further comprising: a discharge position changing unit that changes a position of the coating liquid discharge port by moving the coating liquid in a direction perpendicular to the direction. 18. The coating liquid according to claim 8, wherein the coating liquid supply unit includes a plurality of coating liquid discharge ports arranged in a zigzag pattern along a direction orthogonal to the direction of the reciprocation. Liquid supply device. 19. A coating liquid circulating means for supplying the coating liquid collected in the coating liquid receiving tank to the coating liquid supply unit.
20. The coating liquid supply apparatus according to any one of claims 18 to 18.