JPH0938549A - Roll coater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent stagnation of a liq. from being generated on the boundary part between a coating part and a non-coating part of a plate to be coated. SOLUTION: In a roll coater wherein a plate B to be coated is fed between a pair of coating rollers 52 arranged in parallel on the horizontal face and a coating liq. provided on the surfaces of the coating rollers is applied on both faces of the plate B to be coated, air spray nozzles 58 for spraying a gas from the outside of the roller side face are provided at the position where each coating roller 52 meets.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll coater for coating both surfaces of a printed circuit board, a lead frame or the like with a coating film.

[0002]

2. Description of the Related Art FIG. 12 shows a centering mechanism 101 for positioning a coated plate B such as a printed circuit board or a lead frame, and a direction change of the coated plate B provided on the downstream side of the centering mechanism 101. A roll coater 100 is provided with a direction changing mechanism 102 and a pair of coating rollers 103 that are arranged opposite to each other with a slight gap formed above the direction changing mechanism 102.

A pretreatment step 104 provided with a washing machine and the like is arranged on the upstream side of the centering mechanism 101, and the coated plate B derived from the pretreatment step 104.
However, a rack 1 that has a horizontal shelf directly or once
After being accommodated in 05, they are sequentially introduced into the centering mechanism 101 while maintaining a horizontal posture, and are sandwiched by a plurality of vertical rollers 101a provided opposite to both side edges of the plate B to be coated. The plate B is positioned.

The direction changing mechanism 102 is internally equipped with a posture changing device for changing the horizontal posture of the plate B to be coated into a vertical posture. The plate B to be coated supplied to the direction changing mechanism 102 is converted by this posture changing device. The vertical position is set, and the upper edge portion is positioned so as to face the gap between the pair of coating rollers 103, and is pushed up toward the gap.

On the other hand, the pair of coating rollers 10 described above.
3 has a doctor device 103a whose upper surfaces face each other so as to form a slight gap over the entire length in the longitudinal direction.
Is provided. These doctor devices 103a
The space (coating liquid storage part) between the upper surface and the outer peripheral surface of the coating roller 103 is obliquely arranged so that the coating liquid C is filled therein. The outer peripheral surface of the coating roller 103 is coated with the coating liquid C by rotating the pair of coating rollers 103 in the opposite directions so that the facing surfaces thereof face upward while the storage section is filled with the coating liquid C. It will be in the state of being.

Therefore, the coated plate B is pushed up toward the gap between the pair of rotating coating rollers 103, so that both coating rollers 10 are coated.
The coating liquid C that passes through the gap while contacting the coating roller 3 and coats the outer peripheral surface of the coating roller 103 is applied to the front and back of the coated plate B, and the front and back of the coated plate B are coated. Then, the coated plate B pushed up to the upper part of the coating roller 103 has its upper edge portion gripped by the gripping means 106, and is led out toward a drying process not shown.

By the way, in order to grip the coated plate B drawn out from the coating roller 103 by the gripping means 106, when the coating liquid C is applied over the entire surface of the coated plate B, the gripping is performed. The gripping means 1 is peeled off due to the peeling of the coating film on the part
Inconvenience such as the coated plate B sticking to 06 occurs.

Therefore, the coating roller 103 has a length smaller than the lateral width of the plate B to be coated, and the coating liquid C in the central portion is applied to the front and back of the plate B to be coated by this. It is conceivable to form the coating portion B1 and the non-coating portion B2 on both sides of the coating portion B1 to which the coating liquid C is not applied. By doing so, the non-coating portion B2 can be gripped by the gripping means 106, and the inconvenience as described above can be avoided.

[0009]

By the way, FIG. 13 shows
The coated plate B coated with the coating liquid C by the coating roller 103 is shown as an example. (A) is a plan view and (b) is a sectional view. When the length dimension is shorter than the lateral width of the coated plate B, when the coated plate B passes between the pair of coating rollers 103, the side of the coating roller 103 at the boundary portion between the coated portion B1 and the non-coated portion B2. The coating liquid C is extruded from the end portion to the non-coating portion B2, and a liquid pool B3 bulging like a belt is formed there.

If such a liquid pool B3 is formed, the thickness of the coating layer of the coating liquid C will not be uniform and the appearance will be unsightly, and the portion of the liquid pool B3 will not be dried in the next drying step, resulting in adhesion. Since the property remains, the inconvenience arises in the subsequent handling of the coated plate B.

The present invention has been made to solve the above problems, and provides a roll coater in which a liquid pool is not formed at the boundary between the coated portion and the non-coated portion of a coated plate. It is an object.

[0012]

According to the first aspect of the present invention,
A roll coater that supplies a plate to be coated between a pair of coating rollers arranged side by side on a horizontal plane and applies the coating liquid applied to the surface of the coating roller to both sides of the plate to be coated. It is characterized in that a gas injection nozzle for injecting gas from the outside of the side surface of the roller is provided at a position where the roller meets by rotation.

According to the present invention, for example, the lateral width dimension of the plate to be coated is longer than the length dimension of the coating roller, so that when the plate to be coated passes between the pair of coating rollers, the side portion of the plate to be coated is Even when the coating liquid protrudes from the side edge portion of the coating roller, the gas is jetted from the gas jet nozzle to push the coating liquid from the coated portion to the non-coated portion of the plate B to be coated. Generation is blocked.

According to a second aspect of the present invention, in the roll coater according to the first aspect, the gas injection nozzle has an elongated ejection port in a vertical direction.

According to the present invention, since the gas is widely jetted from the long jet port in the vertical direction, the effect of preventing the formation of the liquid pool is improved.

[0016]

1 is a process chart showing an example of a series of coating processes for a plate B to be coated. As shown in this figure, in the coating process, the plate B to be coated is subjected to a pretreatment process P1 and a coating process P2.
And the post-treatment process P3 is sequentially supplied.

The pretreatment step P1 is performed on the coated plate B.
Is a step of performing a pretreatment such as a washing treatment, and in this step, for example, a washing machine 200 is adopted, whereby the front and back of the plate B to be coated are cleaned in advance. The coating step P2 is a step of performing a coating process on the front and back surface-cleaned coated plate B derived from the pretreatment process P1, and the roll coater 1 according to the present invention is applied to this step. The post-treatment process P3 is a process of subjecting the plate B to be coated derived from the coating process P2 to a post-treatment such as a drying treatment. In this process, for example, the drying device 300 is adopted, and it is derived from the roll coater 1. The plate B to be coated is brought into the drying device 300 by the transporting means 8, dried, and then supplied to the next step.

FIG. 2 is a partially cutaway perspective view showing an embodiment of the roll coater according to the present invention. Further, FIG. 3 is a perspective view of the same and shows a state in which the coated plate is pushed up by the coated plate pushing-up mechanism.
Further, FIG. 4 is a front view of FIG. 2, FIG. 5 is a side view of FIG.
FIG.

The roll coater 1 is formed so as to be supported between a pair of width-direction machine frames 11 installed on the floor F. Each machine frame 11 includes front and rear columns 12, and these columns 1.
The beam member 13 is bridged to the top of the beam member 2, and the support plate 14 is provided at a substantially central portion of the beam member 13.

Between the pair of machine frames 11 is a conveyor mechanism (conveying means) 2 for carrying the rack 6 loaded with a plurality of coated plates B, and the conveyor mechanism 2 is moved forward and backward as a whole in the width direction. The conveyor lateral movement mechanism 3, a push-up mechanism (elevating section) 4 for sequentially pushing the coated plates B loaded in the rack 6 upward one by one, and coating the front and back sides of the coated plate B pushed up by the pushing mechanism 4. A coating mechanism 5 for applying the liquid C is provided. Further, in the vicinity of the machine frame 11, a control device (conveyance control means, lift control means, deviation correction means) 7 for controlling the operation of the roll coater 1 is provided.

In FIG. 4, the conveyor mechanism 2 includes a belt support stand 2 having side walls 21a provided upright on both sides in the width direction.
1. A pair of front and rear rollers 22 provided in front of and behind the pair of side walls 21a, a pair of width-direction conveyor belts stretched between the pair of rollers 22, and a belt drive motor for driving the conveyor belt 23. 24 and.

On the bottom surface of the bottom plate 21b of the belt support base 21, a pair of front and rear brackets 21c are provided in a protruding manner, and a support rod 15 is provided through these brackets 21c so as to be slidable relative to each other. These support rods 1
5 is fixed to a bracket 17 having both ends fixed to a lower beam member 16 bridged between the front and rear columns 12, whereby the conveyor mechanism 2 can be laterally moved by a support rod 15 in the width direction. .

Each of the rollers 22 is arranged between a pair of side walls 21a and is rotatable about its own axis.
It is fixed concentrically to the roller shaft 22a supported by a. The roller shaft 22a on the front side (the left side of FIGS. 2, 5, and 6) has a pulley 22 on the outer side of the side wall 21a.
b is fixed concentrically. On the other hand, in the belt drive motor 24, the drive shaft 24a is fixed to the inside of the motor support plate 25 vertically extending from the one side wall 21a so that the drive shaft 24a extends in the width direction, and the drive shaft of the portion penetrating the motor support plate 25. 24
A pulley 24b is concentrically fixed to a.

The timing belt 2 is provided between the pulley 24b of the drive shaft 24a and the pulley 22b of the roller shaft 22a.
6 is stretched so that the rotation of the belt drive motor 24 is transmitted to the front roller shaft 22a via the timing belt 26. And the front roller shaft 22a
The rotation of the roller 22 in the clockwise direction in FIGS. 2 and 5 causes the conveyor belt 23 to circulate between the front and rear rollers 22.

2 and 4, the conveyor lateral movement mechanism 3 includes a pair of lateral movement mechanism supporting beam members 18 bridged between the front and rear lower beam members 16, and a bottom plate 21b of the belt support frame 21. It is provided between. The conveyor traverse mechanism 3 includes a conveyor traverse motor 3 fixed to a lower portion of the traverse mechanism supporting beam member 18 so that the drive shaft 32 extends in the width direction.
1, a pair of brackets 18a in the width direction that are erected on the upper portion of the pair of lateral movement mechanism supporting beams 18, and a screw shaft 18b that is rotatably provided in the pair of brackets 18a.
And a pulley 32a concentrically fixed to the drive shaft 32 and a pulley 18c concentrically fixed to the screw shaft 18b.
It has a timing belt 33 stretched between them.

On the other hand, the belt support base 21 has a bottom plate 21b.
It has the screwing member 27 suspended downward from. A female screw corresponding to the screw shaft 18b is screwed to the screw member 27, and the screw shaft 18b is screwed to the female screw so that the conveyor lateral movement mechanism 3 and the conveyor mechanism 2 are mutually connected. Have been contacted. Therefore, by driving the conveyor lateral movement motor 31, its driving force is increased.
2, is transmitted to the screw shaft 18b through the pulley 32a, the timing belt 33, and the pulley 18c, and the screw shaft 18b
The rotation of the screw member 27 in the width direction causes the conveyor mechanism 2 integrated with the screw member 27 to move in the width direction while being guided by the support rod 15.

The push-up mechanism 4 is provided with a casing 41 vertically extending from the bottom plate 21b of the belt support frame 21, an elevating means (not shown) provided in the casing 41, and a connecting means to the elevating means. The push-up member 42 is provided on the front end side thereof and protrudes from the casing 41 to the outside. A guide groove 41a, which is cut out over the entire length in the vertical direction, is provided on the front surface of the casing 41. The push-up member 42 is pulled out from the guide groove 41a to the outside, and the lifting means of the above-mentioned not shown. The push-up member 42 is driven to move the guide groove 41.
It is designed to move up and down while being guided by a.

The push-up member 42 is composed of a push-up rod 43 in an upright posture and a receiving member 44 extending in the width direction and having a central portion fixed to the upper end of the push-up rod 43. This receiving member 44 has a plate B to be coated on its upper surface.
Receiving groove 44a extending in the width direction into which the lower edge of the
Is recessed. The length of the receiving member 44 is set to be slightly shorter than the distance between the pair of conveyor belts 23.

The push-up member 42 is set to a length dimension such that the upper surface level of the receiving member 44 is slightly lower than the upper surface level of the forward belt of the conveyor belt 23 in the lowermost position of the guide groove 41a. Has been done. Further, the receiving member 44 is the bottom plate 2 of the belt supporting base 21.
1b A long hole 2 formed in the central portion over substantially the entire width direction
It penetrates through 1d and projects upward. Therefore, when the lowermost receiving member 44 is moved upward by the driving of the elevating means in the casing 41, the coated plate B in the rack 6 located right above the lower receiving member 44 has its lower edge portion as shown in FIG. Will rise in a state of being fitted in the receiving groove 44a.

The coating mechanism 5 has a pair of roller shafts 51 arranged side by side in the upper portion of the conveyor mechanism 2 so as to extend in the width direction, a pair of coating rollers 52 provided on these roller shafts 51, and this coating. Roller 5
2, a doctor device 53 for applying the coating liquid C to the outer peripheral surface, a roller drive motor 54 for rotating the roller shafts 51 in opposite directions, and a roller interval for intermittently expanding or contracting the interval between the pair of coating rollers 52. The expansion / contraction unit 55 and the liquid pool suppressing unit 56 that suppresses the pooling of the coating liquid C at the boundary between the coated surface and the non-coated surface of the coated plate B are provided.

The pair of roller shafts 51 are connected to each other by the machine frame 11
Is bridged between the support plates 14 so as to be rotatable about the axis. A gear 51a is formed at one end of each of the roller shafts 51, while the drive shaft 5 of the roller drive motor 54 is formed.
Worm gears 54b that mesh with the respective gears 51a are concentrically attached to 4a. The worm gears 54b adopt a so-called reverse screw method in which the respective spiral directions are set to be opposite to each other, and the rotation directions of the pair of roller shafts 51 due to the rotation of the worm gears 54b are set to be opposite to each other. ing. Specifically, the roller shaft 51 on the right side in FIGS.
Rotates clockwise about its own axis, and the left roller shaft 51
Is rotating counterclockwise.

The coating roller 52 is a cylindrical body made of a flexible material such as synthetic rubber. One thin spiral groove is screwed on the outer peripheral surface of each of the coating rollers 52 so that the coating liquid C applied to the coating roller 52 enters the spiral groove. The uniform holding is ensured over the entire surface.

In this embodiment, the length of the coating roller 52 is the plate B to be coated.
The width of the coating roller 5 is set to be slightly shorter than the width of the coating roller 52, and as a result, as shown in FIG.
The coating portion B1 having a width corresponding to the length dimension of 2 is formed. And this coating part B
A strip-shaped non-coating portion B2, to which the coating liquid C is not applied, is formed over the entire length in the vertical direction on the outer side of 1, that is, on both sides in the width direction of the coated plate B.

In FIG. 5, the doctor device 53 is
It is formed by a rectangular bar in a cross-sectional view that is inserted between the support plates 14 of the machine frame 11. At one of the upper corners of this timber, a stud portion 53a is provided so as to project over the entire length in the longitudinal direction. The doctor device 53 is arranged such that the upper surface portion of the doctor roller 53 is in contact with the outer peripheral surface of each coating roller 52 and the coating liquid C can be filled between the outer peripheral surface of the coating roller 52 and the upper surface portion of the doctor device 53. Has been done.

Further, in the doctor device 53, a dam member 53b is arranged at a portion corresponding to the end of the coating roller 52, whereby the portion of the surface of the doctor device 53 facing the coating roller 52 is filled with liquid. Part 5
3c is formed, and the liquid filling portion 5 is formed by the dam member 53b.
The coating liquid C filled in 3c is prevented from leaking.

The roller gap expanding / contracting means 55 has one of the pair of roller shafts 51 and a doctor device 53 corresponding thereto.
It is a mechanism to move horizontally intermittently in the front-back direction together with. The intermittent movement of the roller shaft 51 and the doctor device 53 by the roller spacing expansion / contraction means 55 is such that one roller shaft 51 is horizontal in the direction in which the coated plate B is pressed and nipped by the pair of coating rollers 52 immediately before the coating operation. When the coating roller 52 moves and the coating operation on the plate B to be coated is completed, the one movement of the one roller shaft 51 in the direction in which the coating roller 52 moves away from the plate B to be coated is adopted. It is designed to be repeated each time the coating operation is performed.

Returning to FIG. 2, the liquid pool suppressing means 56.
Is a boundary between the coating surface and the non-coating surface of the coated plate B in the course of coating, with a blower pump 57 that takes in and blows air, and the air blown by the blower pump 57 through a predetermined blower duct. And a spray nozzle 58 for spraying toward the portion.

FIG. 7 is a view showing an injection nozzle,
(A) is a perspective view of the tip of the injection nozzle, and (B) is an explanatory plan view showing the arrangement of the injection nozzles. As the jet nozzle 58, one having a vertically long jet port is adopted. Two of the spray nozzles 58 are arranged side by side between the roller shafts 51 on one side of the coating roller 52, with the spray ports facing the side edges of the coating rollers 52, and the other two are similarly arranged. They are arranged side by side between the roller shafts 51 on the side.
Note that FIG. 7B shows only two injection nozzles 58 arranged on the right side of each coating roller 52 so as to sandwich the side edge portion of the plate B to be coated.

In the blower pump 57, the coated plate B is supplied between the rotating coating rollers 52, and the coating liquid C applied to the outer peripheral surface of each coating roller 52 is applied to the front and back surfaces of the coated plate B. I am trying to drive when I am. By doing so, the air sprayed from the spray nozzle 58 is sprayed onto the non-coated surface of the coated plate B that laterally extends from the coating roller 52, so that the coating generated at the boundary between the coated surface and the non-coated surface. The liquid puddle of the liquid C is pushed toward the application surface, whereby the formation of the liquid puddle at the boundary portion is suppressed.

As shown in FIGS. 2 to 5, the rack 6 extends vertically in a rectangular parallelepiped rack frame 61 formed of a wire and inner side surfaces of the rack frame 61 facing each other in the width direction. In addition, a plurality of partition frames 62 are provided so as to have an equal pitch. Storage slits 63 are formed between the partition frames 62 to fit the opposite sides of the coated plate B, and the opposite sides of the plurality of coated plates B are sequentially fitted into the storage slits 63 facing each other. As a result, the rack 6 is loaded with a predetermined number of coated plates B. When performing the coating process, the rack 6 loaded with a plurality of coated plates B is placed on the conveyor belt 23.

FIG. 8 is a perspective view showing an embodiment of the conveying means. The conveying means 8 is gripped by a pair of left and right gripping arms 81 for gripping the coated plate B that has been subjected to the coating process, which is drawn out upward from the coating roller 52 of the coating mechanism 5. A clip applying means (not shown) for attaching the clip 81b to the non-coating portion B2 and a conveyer conveyor 82 for carrying the coated plate B into the drying device 300 are provided.

The gripping arm 81 has a gripping finger 81a at the tip thereof.
The uncoated portion B2 of the coated plate B, which is drawn out upward from the coating roller 52, is gripped from both sides by the gripping fingers 81a. Then, in synchronization with the gripping operation by the gripping arm 81, the clip applying means (not shown) is actuated, and the clip 8
1b is attached to the upper ends of both uncoated portions B2. The clip 81b has a hook on the top.

The transfer conveyor 82 has a pair of widthwise members stretched between a pulley 83 which is driven and rotated by an unillustrated driving means and an unillustrated driven pulley which is provided corresponding to the pulley 83. The rope-shaped belt 84 and a plurality of locking bars 84a made of a U-shaped member bridged between the rope-shaped belts 84 are configured.

The gripping arm 81 and the conveyer conveyor 82 are operated in synchronization with each other, and the locking bar 84a which reaches the head portion of the pulley 83 by the orbital movement of the rope-shaped belt 84 has a predetermined gripping arm 81. The clip 81b attached to the coated plate B is locked by the operation. Therefore, the coated plate B sequentially drawn out from between the coating rollers 52 is locked by the locking bar 84 a that sequentially moves, and is sequentially introduced into the drying device 300 while being suspended by the rope belt 84. Will be done.

FIG. 9 is a block diagram showing an embodiment of control of the roll coater. The operation of the roll coater 1 is controlled by the controller 7. For this operation control,
The roll coater 1 is provided with various sensors at appropriate places. The detection signal from each sensor is input to the control device 7, and the control signal is output from the control device 7 to each device based on the detection signal. In FIG.
The detection signal input from each sensor to the control device 7 is shown by a dotted line, and the control signal output from the control device 7 to each device is shown by a one-dot chain line.

A width direction position sensor 71 for detecting the position in the width direction of the coated plate B pushed up by the push-up mechanism 4 is provided below the pair of roller shafts 51 (see FIG. 4). . FIG. 10 is an explanatory view showing an embodiment of the width direction position sensor. (A) shows a state where the coated plate is in a normal position, (B) shows that the coated plate is located on the right side of the normal position. The shifted state (C) shows the state where the coated plate is displaced to the left of the normal position. FIG.
As shown in FIG.
1a, a vertically long sensor support portion 71b provided at the tip of the support arm 71a, and a right detection end 71c and a left detection end of an optical sensor provided on the sensor support portion 71b with a slight displacement in the width direction. It is composed of the end 71d.

The support arm 71a is constructed so as to project and retract in synchronism with the intermittent movement of the conveyor belt 23, and is normally located at a place where it does not interfere with the plate B to be coated. Each time it moves by the pitch, it projects in the direction of the plate B to be coated, and the sensor support portion 71b is located at the detection position overlapping the right side of the plate B to be coated.

When the coated plate B is in the normal position in the width direction with the sensor support portion 71b positioned at the detection position, the left detection end 71d is covered by the left detection end 71d as shown in FIG. Although the presence of the coating plate B is detected, the width direction position sensor 71 is arranged and set so that the right detection end 71c does not detect the presence of the coated plate B.

Therefore, when the plate B to be coated is displaced to the right of the normal position, as shown in FIG. 10B, both of the detection ends 71c and 71d are on the plate B to be coated. In order to detect the presence, the control device 7 determines that the plate B to be coated is displaced to the right.

When the plate B to be coated is displaced to the left of the normal position, as shown in FIG. 10C, both of the detection ends 71c and 71d are the plate B to be coated. Since the presence is not detected, the control device 7 determines that the coated plate B is displaced to the left.

On the lower side of the pair of coating rollers 52 and upstream of the fixed position where the frontmost coated plate B is set, the coated plate B is placed in the storage slit 63 next to the rack 6. A plate presence / absence sensor 72 is provided to detect whether or not it is loaded.

FIG. 11 is an explanatory view showing an embodiment of the plate presence / absence sensor 72, wherein (a) shows the leading storage slit 63.
The state where the plate B to be coated is loaded, and the state (B) shows the state where the plate B to be coated does not exist in the leading storage slit 63. As shown in FIG. 11, the plate presence / absence sensor 72 is a light emitting terminal 7 of an optical sensor provided to face each other with a pair of widthwise conveyor belts 23 interposed therebetween.
It is formed by 2a and the light receiving terminal 72b.

The light emitting terminal 72a is fixed at a fixed position X in the front-rear direction (upward starting position,
The coated plate B in this position is pushed up slightly by the push-up mechanism 4) and slightly downstream in the transport direction (see FIG. 11).
(Above the sheet of paper), further to the right of the conveyor belt 23 on the right, and the light receiving terminal 7
2b is provided slightly upstream of the front-rear direction fixed position X in the conveying direction (below the paper surface of FIG. 11), and is provided further to the left of the conveyor belt 23 on the left side. The optical path of the light heading for the light passes through the coating plate loading position at the fixed position X in the front-rear direction.

Therefore, when the coated plate B is present in the storage slit 63 located at the fixed position X in the front-rear direction,
As shown in (a) of FIG. 11, the light from the light emitting terminal 72a is blocked by the coated plate B and does not reach the light receiving terminal 72b, so that the coated plate B exists at the fixed position X in the front-rear direction. Is determined by the control device 7.

Also, the storage slit 6 at the fixed position X in the front-rear direction.
When the coated plate B does not exist in 3, the light from the light emitting terminal 72a reaches the light receiving terminal 72b as shown in (b) of FIG. The controller 7 determines that the coated plate B does not exist.

A rack position sensor 73 for detecting the position of the rack 6 placed on the conveyor belt 23 by a conventional method is provided at an appropriate position on the machine frame 11 or the belt support frame 21 (FIGS. 2 to 5). The detection result of the rack position sensor 73 is input to the control device 7 one by one.

Then, based on the detection signals input from the width direction position sensor 71, the plate presence / absence sensor 72 and the rack position sensor 73, a predetermined control signal is sent from the control device 7 to the belt drive motor 24 and the conveyor lateral movement. Motor 3
1, the push-up mechanism 4, the roller drive motor 54, and the blower pump 57, and the conveyor mechanism 2,
The conveyor lateral movement mechanism 3, the push-up mechanism 4, and the coating mechanism 5 operate in cooperation with each other, and the coating process for the coated plate B loaded on the rack 6 is automatically performed.

Specifically, a predetermined number of the coated plates B derived from the pretreatment process P1 (FIG. 1) are first sequentially loaded into the storage slits 63 of the rack 6. Then, the rack 6 loaded with the plate B to be coated is placed at an appropriate position on the upstream side of the driving conveyor belt 23. The conveyor belt 23 is driven until the rack position sensor 73 detects the presence of the rack 6, and when the rack position sensor 73 detects the presence of the rack 6, the control device 7 sends a drive stop control signal to the belt drive motor 24. Is output, which stops the conveyor belt 23.
At the time of this stop, the top storage slit 6 of the rack 6
3 is located at the fixed position X in the front-rear direction.

In this state, the light emitting terminal 72a emits light in response to a control signal from the control device 7, and the coated plate B is placed in the first storage slit 63 depending on whether the light receiving terminal 72b receives the light from the light emitting terminal 72a. It is detected whether or not it is stored.

When the light receiving terminal 72b does not receive light, that is, when the coated plate B is not stored in the leading storage slit 63, the conveyor belt 23 is advanced by the control signal from the controller 7 and the next storage slit. The presence or absence of the coated plate B of 63 is determined, and the conveyor belt 23 is repeatedly advanced by one pitch until the storage slit 63 in which the coated plate B is present reaches the fixed position X in the front-rear direction.

Then, in the state where the plate B to be coated is present at the fixed position X in the front-rear direction, the width direction position sensor 71 projects in the direction of the plate B to be coated, and the plate B to be coated in the width direction moves. Detect the position. This detection signal is input to the control device 7, and it is determined whether or not the position in the width direction is normal. If the coated plate B is displaced to the right (see (B) in FIG. 10), the control is performed. A control signal for moving the conveyor lateral movement mechanism 3 to the left is output from the device 7 to the conveyor lateral movement motor 31. This causes the conveyor lateral movement mechanism 3 to move to the left. Then, the control device 7
The state in which the plate B to be coated has reached the normal position in the width direction (the state (a) in FIG. 10) is determined by the detection signal from the width direction position sensor 71, and the control signal for stopping the drive is given to the conveyor lateral movement motor 31. Output. As a result, the position of the top of the coated plate B in the width direction is normally set.

On the contrary, when the plate B to be coated is displaced to the left (see (c) of FIG. 10), it is detected by the width direction position sensor 71, and the control signal from the controller 7 is generated by this. The conveyor lateral movement mechanism 3 moves to the right, reaches the normal position, and stops.

When the plate B to be coated is in the state of being positioned at the normal position in the width direction by the lateral movement of the conveyor lateral movement mechanism 3 (see (a) in FIG. 10), first, the roller is driven by the control signal from the controller 7. The motor 54 is driven, whereby the pair of coating rollers 52 rotate in opposite directions, and the plate B to be coated is ready to be received. After that, a control signal is output from the control device 7 to the push-up member 42 to push the coated plate B upward, and further, a control signal for driving the blower pump 57 is output. The coating roller 52 may be constantly rotating during the operation of the roll coater 1.

Then, the push-up member 42 is operated by the control signal.
Rises, whereby the coated plate B is supplied between the pair of coating rollers 52 rotating in opposite directions (see FIG. 3), and is guided by the rotation of the coating roller 52 to rise. Coating liquid C adhering to the outer peripheral surfaces of the pair of coating rollers 52
Is applied to the front and back of the plate B to be coated, and the coating process of the plate B to be coated is completed.

While the plate B to be coated is raised by the rotation of the pair of coating rollers 52,
Since the air sent from the blower pump 57 is blown toward the coating portion B1 of the plate B to be coated from the jet nozzle 58, the coating portion B is coated with the coating liquid C protruding from the side end portion of the coating roller 52.
1 and the non-coating portion B2 are blown toward the coating portion B1 in a liquid pool, which causes a band-shaped expansion of the coating liquid C, which has been conventionally formed on the coated plate B to be coated. No protrusions are formed, and the thickness of the coating layer is uniform.

The coated plate B on which the coating process is completed is gripped by the gripping arm 81 shown in FIG.
Be transported to.

When the push-up member 42 is lowered, the conveyor belt 2 is controlled by a control signal from the control device 7.
3 moves and the next storage slit 63 of the rack 6 reaches the fixed position X in the front-rear direction. At this time, the control device 7 determines whether or not the next coated plate B is present in the storage slit 63 based on the detection signal from the plate presence / absence sensor 72. The storage slit 63 is fixed in the front-rear direction X
The conveyor belt 23 is moved until it reaches. As a result, when the storage slit 63 has a space, that portion is skipped and the conveyor belt 23 moves around,
The driving of the belt drive motor 24 is stopped while the next coated plate B is set at the fixed position X in the front-rear direction.

After that, the control device 7 outputs the same control signal as in the case of the first plate B to be coated, whereby the plate B to be coated is subjected to a predetermined coating treatment, and thereafter the same control device 7 is performed. The coating process is sequentially performed on the coated plate B loaded in the rack 6 by the drive control according to.

The coated plate B in the rack 6
When all of the coatings have been coated, the conveyor belt 23 is driven until the rack position sensor 73 detects that the next rack 6 has reached the fixed position, and the rack 6 is targeted from the time when the next rack 6 reaches the fixed position. The same drive control as described above is performed.

As described in detail above, the roll coater 1 of the present invention loads a plurality of coated plates B on a rack 6 in a vertical posture, intermittently moves the rack 6 by a conveyor belt 23, and then stops. Each time, the coated plate B located under the pair of coating rollers 52 is pushed up by the push-up mechanism 4 and supplied between the pair of coating rollers 52, thereby forming the coating portion B1 on the front and back sides of the coated plate B. Therefore, unlike the prior art (FIG. 12), it is not necessary to provide the direction changing mechanism 102 having a complicated structure and high equipment cost, which is effective in reducing the equipment cost.

Further, the roll coater 1 is provided with a conveyor lateral movement mechanism 3, which moves the conveyor mechanism 2 as a whole in the width direction of the coated plate B loaded in the rack 6. Since the misalignment is corrected, the direction changing mechanism 102 is used as in the conventional case.
It is not necessary to provide the centering mechanism 101 for positioning the plate B to be coated on the upstream side, and the roll coater 1 of the present invention can also contribute to the reduction of equipment cost in this respect.

Further, in the roll coater 1 of the present invention, the rack 6 loaded with the plate B to be coated is laterally moved to position the target plate B to be coated. By operating the coated plates B one by one, the inconvenience that the coated plates B are scratched or soiled is unlikely to occur, which is also convenient in terms of reducing defective products.

[0073]

According to the first aspect of the present invention,
Since the roll coater has a gas injection nozzle that blows gas from the outside of the side surface of each roller at the position where each coating roller meets by rotation, for example, the width of the coated plate is larger than the length of the coating roller. It is long, so that when the plate to be coated passes between a pair of coating rollers, gas is jetted from the gas jet nozzle even if the side of the plate to be coated is protruding from the side edge of the coating roller. This is advantageous because the coating liquid is extruded from the coated portion of the coated plate B to the non-coated portion to prevent formation of a liquid pool formed.

According to the second aspect of the present invention, since the gas injection nozzle has the vertically long injection port, the gas is widely sprayed from the vertically long injection port. Therefore, the effect of preventing the formation of the liquid separation pool is improved.

[Brief description of drawings]

FIG. 1 is a process chart showing an embodiment of a series of coating processes for a plate to be coated.

FIG. 2 is a partially cutaway perspective view showing an embodiment of a roll coater according to the present invention.

FIG. 3 is a partially cutaway perspective view showing an embodiment of a roll coater according to the present invention, showing a state in which a coated plate is pushed up by a coated plate pushing-up mechanism.

FIG. 4 is a front view of FIG.

FIG. 5 is a side view of FIG.

FIG. 6 is a plan view of FIG.

7A and 7B are diagrams showing an injection nozzle, in which FIG. 7A is a perspective view of a tip end portion of the injection nozzle, and FIG. 7B is an explanatory plan view showing an arrangement state of the injection nozzle.

FIG. 8 is a perspective view showing an embodiment of a transport unit.

FIG. 9 is a block diagram showing an embodiment of control of a roll coater.

FIG. 10 is an explanatory view showing an embodiment of a width direction position sensor, (a) shows a state where the coated plate is in a normal position, and (b) shows that the coated plate is located on the right side of the normal position. The shifted state (C) shows the state where the coated plate is displaced to the left of the normal position.

FIG. 11 is an explanatory view showing an embodiment of a plate presence / absence sensor, (a) shows a state in which a coated plate is loaded in the leading storage slit, and (b) shows a coated plate in the leading storage slit. The states that do not exist are shown.

FIG. 12 is a perspective view showing an example of a conventional roll coater.

FIG. 13 is a view illustrating a coated plate coated with a coating liquid by a coating roller,
(A) is a plan view and (B) is a cross-sectional view.

[Explanation of symbols]

 B Plate to be coated 1 Roll coater 11 Machine frame 12 Struts 13 Beam material 14 Support plate 15 Support rod 16 Lower beam material 17 Bracket 18 Traverse mechanism support beam material 18a Bracket 18b Screw shaft 18c Pulley 2 Conveyor mechanism 21 Belt support stand 21a Side wall 21b Bottom plate 21c Bracket 21d Long hole 22 Roller 22a Roller shaft 22b Pulley 23 Conveyor belt 24 Belt drive motor 24a Drive shaft 24b Pulley 25 Motor support plate 26 Timing belt 27 Threading member 3 Conveyor lateral motion mechanism 31 Conveyor lateral motion motor 32 Drive shaft 32a pulley 33 timing belt 4 push-up mechanism 41 casing 42 push-up member 43 push-up rod 44 receiving member 44a receiving groove 5 coating mechanism 51 roller shaft 51a gear wheel 52 coating low 53 doctor device 53a feeding part 53b dam member 53c liquid filling part 54 roller drive motor 55 roller interval expansion / contraction means 56 liquid pool suppression means 57 blower pump 58 injection nozzle 6 rack 7 control device 71 width direction position sensor 72 plate presence / absence sensor 73 rack position Sensor 8 Transport means

Claims (2)

[Claims] 1. A roll coater for supplying a plate to be coated between a pair of coating rollers arranged in parallel on a horizontal plane and applying the coating liquid applied to the surface of the coating roller to both sides of the plate to be coated. A roll coater characterized in that a gas injection nozzle for spraying gas from outside the side surface of the roller is provided at a position where each coating roller meets by rotation. 2. The roll coater according to claim 1, wherein the gas injection nozzle has a vertically long injection port.