JPH06343905A - Automatic double-sided coating device, coating mist scatter prevention device and coating mist scatter prevention - Google Patents

Abstract

PURPOSE:To prevent a device from being contaminated by providing a fixed side support across a part for charging an object to be coated, a surface coating part, a reversing part, a rear coating part and a discharging part which are all connected to each other, and a movable side support which leaves from and comes in contact with the fixed side support in such a manner that an interval between both supports can be adjusted, and further, transporting the object using a transport means with a sending claw, and mounting a specified coating mist scatter prevention part at each coating part. CONSTITUTION:A fixed side angle pipe 12 and a movable side angle pipe 14 are arranged in a longitudinal direction and mutually side by side. In addition, the movable side angle pipe 14 can slide away from and in contact with the fixed side angle pipe 12 so that the interval between them is variable. Further, a charging part 50, a surface coating part 60(C), a reversing part (D), a rear coating part 80(E), and a discharging part 90(F) are formed in a transport direction. An object to be coated is transported from the charging part 50 to the discharging part 90(F) using a transport part which becomes engaged with a sending claw attached to the fixed side angle pipe 12, and the front and rear surfaces are coated. A fixed side coating mist prevention part 61 consisting of a side plate 101 and a movable side coating mist prevention part 61a of a side plate 103 are provided on the surface coating part 60(C) and the rear coating part 80(E) respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an automatic double-sided coating device,
More specifically, the present invention relates to a paint mist scattering prevention device and a paint mist scattering prevention method. More specifically, for example, surface protection of a printed wiring board or the like incorporated in an electronic device, or soldering generated when soldering an electronic device to a printed wiring board or the like. An automatic double-sided coating device that coats a special wiring paint on a printed wiring board so as not to cause a short circuit in a fine wiring pattern due to scattering, and a so-called "spray coating" in which the paint is sprayed as a fine spray (paint mist) on the object to be coated. In the process,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint mist scattering prevention device and a paint mist scattering prevention method that extremely efficiently shield scattered paint mist.

[0002]

2. Description of the Related Art In recent years, as electronic devices have become smaller, lighter, thinner, more multifunctional, and faster, printed wiring boards mounted in electronic devices have been significantly increased in density and integration. As circuits are becoming finer, there is a strong demand for product reliability and high-speed production in printed wiring board manufacturing technology.

A printed wiring board incorporated in an electronic device is
It has a fine and complicated wiring pattern on the board, and various required electronic devices are mounted by soldering. At that time, special paint (solder, resist,
Ink) must be applied to protect.

The application of this special paint (solder resist ink) is indispensable as a recent printed wiring board manufacturing technique. As the coating method, the silk screen method is currently the mainstream, and other curtain flow coaters. Law, roll coater method, etc. have been proposed.

However, from the technical point of view, future superiority of the spray coating method is expected. In other words, if the spray method is applied, it is possible to obtain the uniformity of the coating film and to reduce the invasion of the paint into the fitting holes (through holes) of various required electronic devices, which is a technical requirement. To obtain a competitive advantage.

Further, the coating material sprayed for coating the object to be coated adheres to the place to be originally coated on the object to be coated and forms a desired coating film, and the surface of the object to be coated is unnecessary. It is a basic fate of the "spray coating method" that it is applied to a spot or is scattered to pollute the surroundings. The so-called "masking" device provided to eliminate this phenomenon as much as possible is indispensable when adopting the spray coating method. Especially, the "masking" device in an automated spray coating device is conventionally It has been the subject of development of this technology.

In a coating device for spraying a fine spray of a paint onto a desired object to be coated, the amount of the paint that adheres to the surface of the object to be coated as a coating film with respect to the amount of the sprayed paint, The so-called "coating efficiency" is 20% of the sprayed paint.
It is said to be about 30%, and the remaining paint is scattered in the painting room (painting booth). Various measures have been proposed for this. In the most primitive cases, paper, tape, etc. are still attached around the four sides to deal with them. In addition, as a slight consideration for pollution, a method of creating a constant laminar flow of air in the coating booth, inducing a paint mist, and supplementally filtering in a filter section is adopted. However, even with this method, the paint mist capture rate is low, and it is extremely insufficient as an effective pollution control measure for air pollution inside the factory and air pollution outside the factory.

[0008]

However, in the existing spray coating, a number of unfavorable phenomena are produced due to functional problems. Special paint (solder,
When the resist / ink) is automatically applied, even if a coating film is unevenly formed on the printed wiring board, the transport chain is contaminated by the spray paint, or the size of the printed wiring board changes, Adjustment of width etc. is completely impossible.

Further, the defects caused by the conventional spray coating method are as follows.
The surface is painted and heated to dry the paint, then the object to be coated is inverted and the back surface is painted, and the same heating and drying is performed, so the surface will be subjected to the heating process twice (once the back surface) As a result, there is a difference in the physical properties of the coating resin between the front surface and the back surface.

In addition, in an equipment or a device for continuously producing (painting) a large number of objects to be coated as an industrial coating, it is needless to say that the coating mist capturing rate in the coating booth is increased and the coating mist is widely used. It is essential to prevent the scattering itself.

In particular, it operates automatically and reliably shields a wide range of sprayed paint from the structure, does not contaminate the entire coating device (particularly the transporting part), and the contamination of the masking device body is not caused by the accumulation of paint. It is necessary to prevent it from adversely affecting the coated objects.

[0012]

[Means for Solving the Application] As described above, the invention according to claim 1 is an automatic double-sided coating apparatus for sequentially processing an object to be coated in a feeding section, a front coating section, a reversing section, a back coating section, and a discharging section. And provided on one side in the longitudinal direction on the required mount,
In addition, a fixed side support body that is provided so as to penetrate from the input portion to the discharge portion, a slide means provided on the pedestal in a direction orthogonal to the longitudinal direction, and attached to the slide means, and from the input portion A width size consisting of a moving side support body penetrating to the discharge part and provided on the other side in the longitudinal direction on the gantry, and a first rotation driving means attached to the gantry and moving the moving side sup port. A conversion part; a guide means for conveying the object to be coated, which is provided in parallel with the fixed side support and the movable side support, and rotatably provided on the fixed side support,
And a claw rotating shaft having claws for feeding the object to be coated at regular intervals,
Second rotation drive means provided at a required position of the pawl rotation shaft, and first reciprocating drive means provided on the fixed side support body for reciprocating the second rotation drive means and the pawl rotation shaft. An object-to-be-conveyed part having: an input part having an object-positioning means attached to guide means for conveying the object to be coated and a detection means; and a fixed side provided adjacent to the input part. And a paint mist scattering prevention unit attached to each of the moving side supports, and a surface coating unit having a movable coating robot above the paint mist scattering prevention unit; and the fixed side at a position adjacent to the surface coating unit. A pair of a stationary rotation plate and a movable rotation plate, which are erected parallel to each other on the support and the movable support, and attached to a rotary shaft fitted in a lower through hole of the fixed rotation plate. The object to be coated guide means and the rotary shaft A connection has been fixed side rotational motion transmitting means, mounted on the stationary side rotary plate, and a second reciprocating drive means which is and connected to the fixed side rotary movement transmitting means,
An object-to-be-coated guide means provided on another rotating shaft fitted in the lower through hole of the moving-side rotating plate, a moving-side rotational motion transmitting means further connected to the rotating shaft, and the fixed-side rotating means. A reversing portion having a motion transmitting means and a connecting shaft for connecting the moving side rotational movement transmitting means; a paint mist splashing provided adjacent to the reversing portion and attached to the fixed side and moving side supports, respectively. And a back surface coating section having a movable coating robot above the paint mist scattering prevention section; detection of an object to be coated which is provided adjacent to the back surface coating section and provided in the transport guide means. It is an automatic double-sided coating device comprising a discharge part having means.

According to a second aspect of the present invention, the coating mist scattering prevention portions are arranged parallel to each other and are rotatable in a direction perpendicular to the conveying direction of the object to be coated. A drive unit for intermittently rotating the two-section shield plate-carrying annular conveyor, and a position where the circumferential length of the two-section shield plate-carrying conveyor belt is divided into a plurality of equal parts, and each of these two-section shield plate-carrying conveyor belts has a corresponding position. 2. The automatic double-sided coating device according to claim 1, comprising a plurality of shield plates that are suspended so as to connect the two, and a cleaning tank that is provided below the two conveyors for conveying shield plates.

According to a third aspect of the present invention, it is arranged on one side of the left and right sides of the article to be conveyed by the required conveying means in parallel with each other, and rotates in a direction perpendicular to the direction of the article to be conveyed. A free circular conveyor for transporting two strips, and
A drive unit for intermittently rotating the two-row shield plate-carrying annular conveyor is connected to a position where the peripheral length of the two-row shield plate-carrying conveyor belt is divided into a plurality of equal parts, and each of the two-section shield plate-carrying circular conveyer corresponding portions. Fixed paint mist scattering prevention unit having a plurality of shielding plates suspended so that the cleaning liquid tank is provided at the lower part of the two-shielding plate conveying annular conveyer; And two parallel shield plate conveying annular conveyors which are arranged in parallel with each other and are rotatable in a direction perpendicular to the conveying direction of the object to be coated, and a drive unit for intermittently rotating the two shield plate conveying annular conveyors. A plurality of shields provided at positions where the circumference of the two-section shield plate transporting annular conveyor is equally divided, and hung so as to connect the corresponding portions of the two shield plate transporting annular conveyors. Under the plate and the annular conveyor for conveying the two shield plates A movable paint mist scattering prevention unit having a cleaning liquid tank; and the shielding plate that is sequentially fed at each stop position of the coating position, the cleaning position, and the standby position to perform the paint scattering prevention, cleaning, and standby processes. A paint mist scattering prevention device that can be implemented sequentially and minimizes paint scattering. Two shield plates for conveying shield plates, which are arranged parallel to each other on the left and right sides in the conveying direction of the object to be conveyed by the required conveying means and are rotatable in the direction perpendicular to the conveying direction of the object to be coated. A conveyor, a drive unit for intermittently rotating the two-section shield plate-carrying annular conveyor, and a position at which the circumference of the two-section shield plate-carrying conveyor belt is equally divided and corresponding to each of the two-section shield plate-carrying conveyor ring. A fixed type paint mist scattering prevention unit having a plurality of shielding plates suspended so as to connect the points and a cleaning liquid tank at the lower part of the two-conveying circular plate conveying conveyor; the other side in the conveying direction , Two shield plate conveying annular conveyors which are arranged parallel to each other and are rotatable in a direction perpendicular to the conveying direction of the object to be coated, and the two shielding plate conveying annular conveyors are intermittently rotated. Drive part and annular ring for conveying the two shield plates A plurality of shield plates suspended at a position where the circumference of the bearing is divided into a plurality of parts, and which are connected so as to connect the respective corresponding portions of the two shield plate transport annular conveyors, and the two shield plate transport A movable paint mist scattering prevention unit having a cleaning liquid tank below the circular conveyor for use;
This is a paint mist scattering prevention device that minimizes paint scattering by enabling each processing of paint scattering prevention, cleaning and standby at each stop position of the standby position.

The invention according to claim 4 is the paint mist scattering prevention device according to claim 3, wherein a fixing means for fixing the shielding plate is provided at a position corresponding to the shielding plate stopped at the coating position.

According to a fifth aspect of the present invention, at the coating position, the step of fixing the shield plate to shield the scattered paint and the end of the paint spray are released, and the shield plate is released from the fixing plate. The method for preventing paint mist scattering comprising the step of enabling movement to the next step position.

[0017]

EXAMPLE An example of the automatic double-sided coating apparatus according to claim 1 will be described with reference to FIGS. In the longitudinal direction on the required pedestal 10 of the automatic double-sided coating apparatus, a charging section 50, a front surface coating section 60, a reversing section 70, a rear surface coating section 80, and a discharge section 90 are sequentially provided adjacent to each other, and an exhaust duct 17 is provided. Has been.
The width size conversion part A of the object to be coated W penetrates from the input part 50 to the discharge part 90 at both ends in the longitudinal direction on the gantry 10 and supports the fixed side square pipe 12 as a fixed side support and the moving side support. A moving side corner pipe 14 as a body is provided. Specifically, the mounting method of the moving-side square pipe 14 is as follows: on the gantry 10 at an intermediate portion between the feeding portion 50 and the front surface coating portion 60 and an intermediate portion between the rear surface coating portion 80 and the discharging portion 90. A slide rail 32 and a slider 32a as slide means are provided on a frame 30 provided on the side opposite to the fixed side square pipe 12 in a direction orthogonal to the conveying direction, and the moving side square pipe 14 is attached to the slider 32a. .

A moving bracket 34 is attached to the moving side corner pipe 14. The moving brackets 34, 34 are attached to jack brackets 34a, 34a connected to the two jacks 35, 35, and one of the jack brackets 34a has a first rotation via a motor mounting bracket 36. A drive motor 38 as a drive means is attached. The two gear pulleys 39a, 39a are connected to each other by a shaft 39b.
The jack 35 is mounted on the mount 10 via a fixed plate 37.
Attached to the drive motor 38,
The gear head 38a, the belt 39, the gear pulley 3
The jack 35 is driven via 9a, and the moving side corner pipe 14 moves together with the moving bracket 34. An encoder 15 is attached to the other gear head 38a in place of the drive motor 38, and the amount of movement, that is, the amount of drive, is counted and used to control the drive motor 38.

Knock pins 25, 25 serving as positioning means are attached to the L-shaped guide rails 22 on the fixed-side square pipe 12 side and the movable-side square pipe 14 side of the throwing section 50, and the fixed-side square pipes. The L-shaped guide on the pipe 12 side
The rail 22 is provided with three photo sensors 21.

When the object W to be coated is charged into the charging section 50, its width is manually input, and according to the input value,
The width size conversion unit A drives the drive motor 38 while counting the drive amount by the encoder 15, and moves the slider 32a of the slide rail 32 and the moving bracket 34 by a required width to move the moving side square pipe. 14 and the fixed side square pipe 12 are adjusted in width. Also, the object to be coated W
The length size of is determined by the photo sensor 21 automatically when the object W to be coated is brought into contact with the knock pin 25 and inserted.

As shown in FIGS. 6, 9 and 10, the article transfer section B is provided with a rodless cylinder 24 for transportation as a first reciprocating drive means on the fixed side square pipe 12, and a cylinder at a required position. A pawl rotating shaft rotating motor 26 as a second rotational driving means is provided via brackets 26a, 26a and cylinder plates 26b, 26b, and pawls 28a, 28a are provided on the inside of the rotating motor 26 at regular intervals so as to project therefrom. The coated object W feed claw rotating shaft 28 is connected, and the belt 28 is connected to the gear pulley 26c of the claw rotating shaft rotating motor 26 and the corresponding gear pulley 28c of the claw rotating shaft 28.
The b is suspended and the rotation motor 26 is rotated at a required angle so that the claws 28a, 28a can be rotated.

In the fixed-side square pipe 12, for guiding the object W to be coated inside the fixed side square pipe 12 in parallel to the portion corresponding to the input portion 50 and the discharge portion 90 via the rail bracket 20. An L-type (that is, an angle-type) guide rail 22 as a guide means is provided, and the front surface coating portion 60, the reversing portion 70, and the back surface coating portion 80 following the input portion 50.
Channel-shaped guide rails 40, which are connected to the L-shaped guide rails 22 and serve as conveyance guide means, are provided at portions corresponding to and.

Therefore, when the object W to be coated is conveyed, the rotation motor 26 first rotates the claw rotating shaft 28 to raise the claws 28a, 28a. Next, the transport rodless
By the operation of the cylinder 24, the pawl rotating shaft 28 makes a stroke motion together with the rotating motor 26, and the pawls 28a, 28a
The a comes into contact with the object W to be coated and is conveyed forward by one stroke. Since the claws 28a, 28a are provided at equal intervals at positions corresponding to the respective steps of the charging unit 50, the front surface coating unit 60, the reversing unit 70, and the back surface coating unit 80, the claws 28a, 28a can be moved by one stroke. The coated object W is conveyed to the next step. When the movement for one stroke is completed, the rotation motor 26 rotates in the reverse direction, the claws 28a, 28a are tilted, and the rodless cylinder 24 returns by the returning operation, but it corresponds to the lower part of the workpiece W on the way. Stop at the position where you want to. At this time, the painting is performed by the painting robot 66 as described later, but the nail 28a is not contaminated with the paint mist. When the painting is completed, it returns to its original position and waits.

A surface coating section 60 (painting robot C) is provided next to the charging section 50. As shown in FIGS. 1, 2 and 4, the surface coating section 60 is composed of a fixed paint mist scattering prevention portion 61 and a movable paint mist scattering prevention portion 61a. The fixed paint mist scattering prevention unit 61 has side plates 101, 101 fixed to the mount 10 on the fixed side square pipe 12 side, and each side plate 101, 101 has five sprockets 62a, 6a.
2a ... are attached, and chain conveyors 62, 6
2 is suspended in a direction orthogonal to the transport direction. The annular chain conveyors 62, 62 thus suspended are arranged in such a shape that their lower portions are widened outward so as not to hinder the traveling of the article W to be conveyed.

A moving side paint mist scattering prevention portion 61a is provided on the moving side square pipe 14 corresponding to the fixed side paint mist scattering prevention portion 61. The moving side paint mist scattering prevention section 6
1a is a side plate 10 attached to the moving side corner pipe 14.
2, 102, and five sprocket wheels 62a, 62a ... Are attached to each side plate 102, 102, and chain conveyors 62, 62 are suspended in a direction orthogonal to the transport direction. The annular chain conveyors 62, 62 suspended in this way are arranged in such a shape that their lower portions are widened outward so as not to hinder the traveling of the workpiece W to be conveyed.

Further, the two chain conveyors 62, 62 on both sides of the two chains are arranged at positions where the circumferences thereof are divided into three equal parts, and the two annular chain conveyors 62, 6 are arranged.
3 shield plates p, p, p so as to connect each corresponding part of 2
The upper ends of both ends are hung so as to be parallel to each other and swingable. Further, drive parts 62b and 62b are provided at required positions of the two shield plates p, p and p conveying annular conveyors 62 and 62 so that they can be intermittently rotated in a direction perpendicular to the conveying direction of the article W to be coated. Cleaning solution tanks 63, 63 are provided below the two-piece chain conveyors 62, 62, respectively, and an electromagnet 23 as a fixing means is provided at a required position of the channel guide rails 40, 40 for carrying the article W to be coated. , 23 are respectively provided so that the lower ends of the shielding plates p, p, p are magnetically attached or released during coating.

Next, the operating condition will be described. The operating conditions are fixed side and moving side paint mist scattering prevention parts 61, 61.
Since a is the same, only the fixed side will be described. Input section 50
When the object W to be coated conveyed from above is stopped at the surface coating section 60, the shielding plate p descending in synchronization with it is 3
It stops at the coating position α corresponding to the equal position and is magnetically fixed to the inside of the guide rail 40 by the electromagnet 23. In this way, the object W to be coated is shielded so that both side edges thereof are surrounded. Next, the coating robot 66 operates as described later,
The surface is painted. As a result, the article W to be coated is coated with the unpainted portions k left on its both ends, and the guide rail 40 and other parts of the apparatus are not contaminated. Further, since the unpainted portion k is also used for the transportation in the subsequent process, the transportation device and the like are not contaminated and the coating film is not damaged.

When the painting is completed, the electromagnet 23 is shielded by the shield plate p.
Is released from the fixed state and can be moved to the next cleaning position β corresponding to the trisection position. The shield plate p moved by the intermittent drive of the drive unit 62b is the cleaning tank 63 at the cleaning position β.
It comes in, stops, and is washed. During this period, the subsequent shield plate p is performing the shielding operation at the coating position α. By the way, the shield plate p, which has been cleaned, is further driven intermittently to the next standby position γ corresponding to the trisecting position. Then, after waiting for a predetermined time at the standby position γ, it moves to the coating position α again, and the same operation is repeated. In this case, the shield p is 3
Although described as one sheet, the number of sheets can be increased without being limited to this, and if a flushing device (not shown) toward the standby position γ or the like is inserted, further sufficient cleaning can be performed.
Further, the length size PL of the shielding plate p is set according to the longest object W to be coated, and the height size PH is
The height is sufficient to prevent paint mist from scattering. Further, as will be described later, exactly the same operation is performed in the back surface coating section 80.

As shown in FIGS. 2 to 4, the coating robot C of the surface coating section 60 includes an X-axis direction driving section 64 on the ceiling bracket 60a and a Y-axis direction driving section 6 having the same structure as the X-axis direction driving section 64.
4a are provided. The coating gun 66 is attached to the slider 69 via a coating gun shaft 66b. The slider 68 of the X-axis direction drive unit 64 includes the Y-axis direction drive unit 64a.
Is installed. When a drive screw (not shown) connected to a rotary shaft (not shown) of the servo motor 67 of the Y-axis direction drive unit 64a is rotated, a slider 69 moves so that a ball screw nut system is adopted. Drive unit 64
The same method is used to allow the coating gun 66 to travel in the X and Y axis directions. And the operation trajectory of the surface coating robot C,
The moving speed is determined in advance in correspondence with the data of the width size of the object to be coated, which is input when the object W to be coated is introduced, and the detection data of the length size of the object to be coated by the photo sensor 21.

12 to 15, the reversing unit 70 (D) for reversing the object W to be coated which has passed through the surface coating unit 60 by 180 ° in the conveying direction will be described. A stationary rotation plate 71 is provided on the stationary square pipe 12 at a position adjacent to the surface coating portion 60, and a movable rotation plate 71a is erected on the movable square pipe 14 in parallel with each other. The rotary shaft 72 is fitted through bearings into the through holes 71b, 71b formed in the lower portion of the stationary rotation plate 71 and the movable rotation plate 71a, and the rotation shaft 72 is fitted on the rotation shaft center line. Channel type guide rails 40, 40 for transporting coated objects W
Is attached via the brackets 74, 74.

The stationary side and movable side rotating plates 71,
Pulleys 72a, 72a are integrally provided on one end of the rotary shafts 72, 72 projecting from 71a, and another pulley 72 is provided on the upper side surfaces of the rotary plates 71, 71a.
Belts 72c and 72c are suspended on b and 72b, and a predetermined portion of a rodless cylinder 73, which is also integrally provided as a second reciprocating drive means in the longitudinal direction, is connected to the belt 72c of the stationary side rotation plate 71. To do. A connecting shaft 77 is integrally attached to the pulley 72b attached to the stationary side rotating plate 71. This connecting shaft 77 and the pulley 7 attached to the moving side rotation plate 71a
2b is connected slidably in the width direction via a key 77a. That is, when the moving side square pipe 14 moves according to the width size of the object W to be coated, the pulley 72b of the moving side rotating plate 71a slides with respect to the connecting shaft 77, while the connecting shaft 77 The rotation of 77 is surely transmitted by the key 77a, and both pulleys 72a rotate synchronously. In this way, the pulley 72a is rotated by driving the rodless cylinder 73 to reverse the article W together with the article channel type guide rails 40, 40. The guide rails 40, 40 of the reversing portion 70 are provided with four mini-cylinders 78 that hold the object W to be coated and prevent the object W from falling during reversing. Further, 79 is a bracket for determining the position of the guide rail 40 at the time of reversing.

The back surface coating section 80 (E) provided adjacent to the reversing section 70 (D) is similar to the front surface coating section 60 in that
A fixed type paint mist scattering prevention unit 61 and a movable type paint mist scattering prevention unit 61a are provided, and the chain conveyors 62, 62 are conveyed in the respective paint mist scattering prevention units 61, 61a via sprockets 62a, 62a. These chain conveyors 62 are suspended in a direction orthogonal to
62 is provided with three shield plates p, p, p as described above, and the coating robot 60 provided on the ceiling between the fixed type paint mist scattering prevention portion 61 and the moving type paint mist scattering prevention portion 61a is X. The rear surface of the object W to be coated is coated while moving the coating gun 66 in the X-axis and Y-axis directions via the axial drive section 64 and the Y-axis drive section 64a.

Then, the object W to be coated, which has been turned over 180 °, is guided by the object-to-be-conveyed portion B, and the fixed side paint mist scattering preventive portion 61 and the movable side are moved in the same manner as in the surface coating portion 60 described above. Guide each of the three shield plates p, p, p together with the side paint mist scattering prevention portion 61a to both sides of the channel guide rails 40, 40 to be coated, and these shield plates p, p by the electromagnets 23, 23. p, p are magnetized at their lower ends, the coating robot C is driven in the X and Y axis directions to coat the back surface of the object W to be coated, and the electromagnets 23, 23 are demagnetized to cause the shield plate p, p,
The fixing to p is released, and the article W to be coated is conveyed to the discharge section 90 (F) via the article conveying section B described above.

Detection of the object W to be coated at a required position on the object L-shaped guide rail 22 on the fixed side of the discharge part 90 (F) provided adjacent to the rear surface coating part 80 (E). A photo sensor 21a is provided as a means for detecting the discharge of the article W to be coated.

[0035]

As described above, in the automatic double-sided coating apparatus according to the present invention, the fixed side square pipe 1 provided on the frame 10 is mounted.
2 and the moving side corner pipe 14 provided corresponding to this,
Since the charging unit 50, the front surface coating unit 60, the reversing unit 70, the back surface coating unit 80, and the discharging unit 90 are sequentially provided adjacent to each other, and the width size conversion unit A of the workpiece W is provided thereto. The width size only needs to be manually input. Therefore, the drive motor 38 is driven by the encoder 15 of the width / size converter A according to the input value, and the slide rail 3 is driven.
2, the slider 32a and the moving bracket 34 are moved by a required width to move the moving side square pipe 14 and the fixed side square pipe 1.
Adjust the width with 2.

After the adjustment of the width is completed, the object W to be coated is inserted into the L-shaped guide rails 22 and 22 while abutting the object W to be knocked on the knock pins 25 and 25 of the inserting section 50. Then, the length size of the object W to be coated is determined by the number of detections of the three photo sensors 21, and the size of the object W to be coated is determined together with the width size data previously input, and the coating robot 66 Operating conditions are determined. Claw 28a when loading is completed
Thus, the article W to be coated is conveyed by one stroke and sent to the surface coating section 60. Then, the surface coating section 60 coats the surface of the article W to be coated, and then it is fed by one stroke, and the reversing section 70 inverts the article W by 180 ° and then it is fed by one stroke. Then, the back surface of the article W is painted by the back surface coating section 80, and finally another stroke is sent to move to the discharge section 90. Then, the article W to be coated is taken out from the discharge section 90. A plurality of photo sensors 21a ... Are provided on the guide rail 22 of the discharging section 90. If the article W to be coated is not taken out from it,
The device has stopped working.

[0037]

According to the automatic double-sided coating device, the paint mist scattering prevention device and the paint mist scattering prevention method according to the present invention, the width size of the coating object is changed when the coating object is charged into the charging section. The required width of the entire device consisting of the input part, the front coating part, the reversing part, the back coating part, and the discharging part can be obtained by a single operation by just inputting the paint mist by the shielding plate of the paint mist scattering prevention part. Is completely prevented, and its lower end is magnetically attached to the inside of the channel-type guide rail for transporting the object to be coated, so that the paint mist sprayed from the coating gun of the coating robot is prevented from scattering. It is prevented in a completely stable state, and furthermore, the object to be coated is reversed by 180 ° in the conveying direction by the reversing section, and the back surface is guided to the front side for coating.
When discharged, both front and back surfaces are uniformly coated, and even if they are heated and dried in the next step, the physical properties of the coating resin on the front surface and the back surface do not differ, and the various effects of improving the production efficiency are extremely large.

[Brief description of drawings]

FIG. 1 is a partially transparent perspective view of an automatic double-sided coating device according to the present invention.

FIG. 2 is a partially cutaway, cross-sectional, and enlarged front schematic view showing the width size conversion portion and the front surface (back surface) coating portion of FIG.

FIG. 3 is a partially cutaway, cross-sectional, and enlarged front schematic view showing a coating robot, a paint mist scattering prevention unit, and the like by further enlarging FIG.

FIG. 4 is an enlarged perspective view showing a chain conveyor of a paint mist scattering prevention unit in FIGS. 2 and 3 and a shielding plate attached to these.

FIG. 5 is a schematic plan view of a width size conversion unit provided on the gantry.

FIG. 6 is a schematic plan view showing an object-to-be-transferred portion provided on the fixed-side and moving-side square pipes of the gantry.

FIG. 7 is a partially enlarged schematic perspective view of a charging unit.

FIG. 8 is a partially enlarged schematic perspective view of a discharge portion.

FIG. 9 is a partially cutaway enlarged front view showing a pawl rotating shaft of a conveying unit provided on a fixed shaft side square pipe, a pawl rotated integrally with the pawl rotating shaft, a rodless cylinder, and the like.

FIG. 10 is a partial front view of a drive motor for rotating the pawl rotating shaft of FIG.

FIG. 11 is a partially enlarged front view of a width size conversion unit provided on the moving side corner pipe.

FIG. 12 is a partially cutaway side view of a width size conversion unit provided in the movable side square pipe shown in FIG.

FIG. 13 is a partially transparent and partially enlarged side view of the reversing portion as seen from the direction of the moving side corner pipe.

14 is a schematic cross-sectional view taken along line X1V-X1V of FIG.

15 is a partially transparent and partially enlarged side view of a portion surrounded by a dotted circle in FIG.

16 is a schematic front view of FIG. 13 as seen from the direction of the discharge portion.

[Explanation of symbols]

 A ... Width size conversion unit; B ... Transport unit; C ... Surface coating unit; D ... Inversion unit; E. .. Back side coating part; F ... Ejecting part; W ... Coating object; 10 ... Stand; 12 ... Fixed side square pipe; 14 ... Moving side square pipe; 15 ... Encoder 21 ... Photo sensor; 22 ... L-shaped guide rail for coating object; 23 ... Electromagnet; 24 ... Rodless cylinder for transport; 26 ... Motor for rotating claw rotating shaft;・ ・ ・ Claw rotating shaft; 40 ・ ・ ・ Coating object channel type guide rail; 50 ・ ・ ・ Injection part; 60 ・ ・ ・ Surface coating part; 61,61a ・ ・ ・ Paint mist scattering prevention upper part ； 101,102 ... Side plate; p ... Shielding plate; 62 ... Chain conveyor; 63 ... Cleaning liquid tank; 66 ... Painting gun; 70 (D) ... Inversion section; 71, 71a ... Rotating plate; 73 ... Rodless cylinder; 80 (E ) ... Backside coating part; 90 (F) ... Discharging part.

Claims (5)

[Claims] 1. An automatic double-sided coating device for sequentially treating an object to be coated in a loading section, a front coating section, a reversing section, a back coating section, and a discharging section; provided on one side in a longitudinal direction on a required mount. And a fixed-side support provided penetrating from the charging part to the discharging part, a slide means provided on the gantry in a direction orthogonal to the longitudinal direction, and attached to the slide means, and the charging means. A moving-side support member penetrating from the portion to the discharging portion and provided on the other side in the longitudinal direction on the gantry, and a first rotation driving means attached to the gantry and moving the moving-side support. A width size conversion part; a guide means for conveying the object to be coated, which is provided in parallel with the fixed side support and the movable side support, and rotatably provided on the fixed side support and fixed. A pawl rotating shaft having pawls for feeding an object to be coated at intervals, and a position of the pawl rotating shaft An object to be coated, which has a second rotation drive means provided at a required position and a first reciprocating drive means which is provided on the fixed side support body and reciprocates the second rotation drive means and the claw rotation shaft. A feeding section; a loading section having an article positioning means attached to the article guiding means for transporting the article and a detecting means; and a feeding section provided adjacent to the loading section on the gantry and the moving side support. A paint mist scattering prevention unit attached to each of them, and a surface coating unit having a movable coating robot above the paint mist scattering prevention unit; and the fixed side support and the moving side adjacent to the surface coating unit. A pair of fixed-side rotating plate and moving-side rotating plate which are erected parallel to each other on the support, and an object to be attached which is attached to the rotary shaft fitted in the lower through hole of the fixed-side rotating plate. Guide means and further fixed connected to the rotary shaft Rotational motion transmitting means, second reciprocating drive means attached to the stationary side rotating plate and connected to the stationary side rotational motion transmitting means, and fitted in the lower through hole of the moving side rotating plate. The object guide means provided on the other rotating shaft, the moving side rotational motion transmitting means further connected to the rotating shaft, the fixed side rotational motion transmitting means and the moving side rotational motion transmitting means are connected. A reversing part having a connecting shaft for connecting; a paint mist scattering prevention part provided adjacent to the reversing part and attached to the gantry side and the moving side support respectively, and movable to an upper part of the paint mist scattering prevention part. An automatic double-sided coating device comprising a rear surface coating section having a flexible coating robot; and a discharge section provided adjacent to the rear surface coating section and having detection means for an object to be coated provided in the conveying guide means. 2. A two-row shield plate-carrying annular conveyor in which paint mist scattering prevention portions are arranged parallel to each other and rotatable in a direction perpendicular to the carrying direction of the article to be coated, A drive unit that intermittently rotates the shield plate transporting annular conveyor,
A plurality of shielding plates provided at positions where the perimeter of the two-section annular conveyor is divided into a plurality of equal parts, and suspended so as to connect the corresponding portions of the two-section annular conveyors for conveying the shielding plate; 2. The automatic double-sided coating device according to claim 1, further comprising a cleaning liquid tank provided below the shield plate transporting annular conveyor. 3. Arranged in parallel to each other on one side of the left and right of the object to be coated conveyed by the required conveying means,
A two-row shield plate transporting annular conveyor that is rotatable in a direction perpendicular to the transport direction of the object to be coated, a drive unit that intermittently rotates the two shield sheet transporting annular conveyors, and the two-way annular conveyor And a plurality of shield plates that are hung so as to connect the corresponding portions of the two conveyors of the shield plates for conveying the shield plates at positions where the circumference of the shield plate is equally divided, and the two shield plate conveyor rings. A fixed type paint mist scattering prevention unit having a cleaning liquid tank at the lower part of the conveyor; and two strips arranged parallel to each other on the other side of the conveyance direction and orthogonal to the conveyance direction of the object to be coated. The shield plate transporting annular conveyor, a drive unit for intermittently rotating the two shield plate transporting annular conveyors, and a position at which the circumferential length of the two stripping plate transporting annular conveyors is equally divided, and Connect two sections of the circular conveyor for conveying shield plates And a movable paint mist scattering prevention unit having a plurality of shield plates suspended from each other, and a cleaning liquid tank below the two annular conveyor plates for conveying shield plates; A paint mist scattering prevention device that minimizes paint scattering by enabling the paint scattering prevention, cleaning, and standby processing to be performed sequentially at each stop position of the coating plate, cleaning position, and standby position. 4. The paint mist scattering prevention device according to claim 3, wherein fixing means for fixing the shielding plate is provided at a position corresponding to the shielding plate stopped at the coating position. 5. A step of fixing a shielding plate to shield scattered paint at a coating position; releasing the fixing of the shielding plate at the end of paint spraying, and moving the shielding plate to the next step position A method for preventing paint mist scattering, which comprises: