JPH0523250Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a coating device, and more specifically, the present invention relates to a coating device that uses a plurality of coating nozzles arranged in a direction substantially perpendicular to the conveying direction of the object to be coated. The present invention relates to a coating device that makes it possible to obtain highly accurate painted surfaces by spraying paint diagonally onto objects.

[Background of the invention] In recent years, the automobile industry has been efficiently producing automobiles as products using highly automated line production processes. In this kind of line production,
In order to meet the demands for mass production of products, for example, painting equipment for painting automobile bodies has become automated.

In this case, various painting apparatuses are employed that paint the automobile body using a plurality of painting nozzles. For example, FIG. 1 shows a configuration in which painting nozzles 4a to 4c are arranged in a straight line in a direction substantially perpendicular to the conveyance direction (direction of arrow A) of the object 2 to be painted. From these painting nozzles 4a to 4c, the paint 6 is sprayed approximately perpendicularly to the object 2 to be painted,
Oval coating patterns 8a to 8c are formed.

By the way, when painting the object 2 to be painted in this manner, the paint 6 interferes with each other in the adjacent areas of each painting pattern 8a to 8c, resulting in a disadvantage of uneven film thickness on the painted surface. It has been pointed out.

Therefore, in order to eliminate such defects, for example, the painting operation is performed while the painting nozzle 4b in FIG. A structure configured to do this has been proposed. In this case, the occurrence of uneven coating due to mutual interference between the paints 6 is avoided, but the coating pattern 8b in the coating nozzle 4b is deformed as shown in FIG. 2, and new uneven coating occurs. It ends up. That is, when the paint 6 is sprayed with the painting nozzles 4a to 4c oriented perpendicularly to the object 2 to be painted, the paint 6 spreads radially, so that the arrows in FIG. 2 are formed between the paint patterns 8a to 8c. An air flow occurs in the direction shown by, thereby deforming the coating pattern 8b. As a result, uneven coating occurs on the object 2 due to deformation of the coating pattern 8b.

[Purpose of the invention] The present invention was made in order to overcome the above-mentioned disadvantages. By performing the painting work with the nozzles tilted in directions different from the conveyance direction, the painting pattern is not deformed by air currents, and
The purpose of the present invention is to provide a coating device that can obtain a highly accurate painted surface.

[Means for achieving the object] In order to achieve the above-mentioned object, the present invention provides a coating device that performs a coating operation using a plurality of coating nozzles arranged in a direction substantially perpendicular to the conveying direction of the object to be coated. In this method, the ejection port of the first painting nozzle located on the front side in the painting direction is arranged inclined at a predetermined angle to the rear side in the painting direction, and the jetting port of the first painting nozzle located on the front side in the painting direction is arranged to be inclined at a predetermined angle, and A second painting nozzle located on the rear side in the painting direction with respect to the first painting nozzle as a reference is arranged such that the spout opening of the second painting nozzle is inclined at a predetermined angle to the front side in the painting direction, and the first painting nozzle adjacent to the first An intersection between the first and second painting nozzles and the object to be coated is located between the first and second painting nozzles and the object to be painted, and the center line of the jetting direction of the paint jetted from the second painting nozzle is viewed from a direction perpendicular to the conveying direction. The first and second coatings are arranged at an angle that separates the coating pattern on the coating object from the coating direction.
It is characterized by being equipped with a painting nozzle.

[Function] In the coating device of the present invention, the paint jetted from adjacent painting nozzles reaches the object to be coated after the center lines of the jetting direction of the paint cross once, and the paint is sprayed from the front and rear sides in the painting direction. Forming a separated paint pattern on the sides. In this case, turbulence of airflow caused by the ejected paint does not occur on the object to be painted, and painting can be performed while maintaining an ideal painting pattern.

[Embodiments] Next, preferred embodiments of the coating apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 3, reference numeral 10 indicates a coating device according to this embodiment. In this case, the coating device 10 is a vehicle body transport mechanism 12 provided along the coating line.
A predetermined coating is applied to the outer panel portion of the vehicle body 14, which is the object to be painted, which is transported by the vehicle, including the bonnet, roof, and trunk cover.

That is, the painting device 10 is a vehicle body transport mechanism 1.
2, and a column 20 that moves along the vehicle body 14 in a direction perpendicular to the figure is erected on the rail portion 16 under the drive action of a travel motor 18. Ru. A pivot arm 24 is attached to the column 20 via a pivot shaft 22 . The swing arm 24 is configured to be able to swing in the direction of the arrow B around the swing shaft 22 under the driving action of a swing motor (not shown) installed in the column 20, and also has an elevating arm attached to the upper end of the column 20. It is configured to be movable up and down in the direction of arrow C under the driving action of the motor 26.

A first connecting rod 28 that is movable in the width direction of the vehicle body 14 is attached to the swing arm 24, and
This first connecting rod 28 has a bracket 30a,
A second connecting rod 32 is attached via 30b. Four attachment members 34a to 34d are attached to the second connecting rod 32 at predetermined intervals. In this case, the mounting members 34a to 34d are formed of substantially elongated rectangular bodies, and one end thereof is connected to the second connecting rod 3.
2, and a third connecting rod 3 is attached to the other end.
6a to 36d and mounting members 38a to 38d
Painting nozzles 40a to 40d are attached through the. The paint 42 is sprayed onto the vehicle body 14 from the painting nozzles 40a to 40d, and paint patterns 44a to 44d are formed on the vehicle body 14 (see FIG. 4).

As shown in FIGS. 4 and 5, the other ends of the mounting members 34a and 34c extend from the second connecting rod 32 in a direction substantially opposite to the direction of painting the vehicle body 14 (direction of arrow A). The other end side to which the third connecting rods 36a and 36c are attached is inclined so as to be closer to the painted surface side of the vehicle body 14 than the one end side attached to the second connecting rod 32. Set. That is, the painting nozzle 40a
and the center line 4 of the paint 42 sprayed from 40c.
6a and 46c are set so as to be inclined at an angle θ (≠0°) with respect to a perpendicular to the painted surface of the vehicle body 14. Similarly, the mounting members 34b and 34d are set symmetrically with respect to the second connecting rod 32 with respect to the mounting members 34a and 34c.
Therefore, the painting nozzles 40b and 40d connected to the mounting members 34b and 34d are attached to the vehicle body 1.
The center lines 46b and 46d of the paint 42 to be sprayed on the vehicle body 14 are set to be inclined by an angle -θ with respect to the perpendicular line erected on the vehicle body 14. Also,
The intersection 50 of the center lines 46a, 46c and the center lines 46b, 46d when viewed from the side in the painting direction is located at the mounting members 34a to 3 separated from the second connecting rod 32.
By attaching the painting nozzles 40a to 40d to the ends of the nozzles 4d via the third connecting rods 36a to 36d and the mounting members 38a to 38d, the nozzles 40a to 40d are set close to the vehicle body 14 side.

The coating apparatus according to this embodiment is basically constructed as described above, and its operation and effects will be explained next.

First, the rotating arm 24 that constitutes the coating device 10
Rotate in the direction of arrow B around the rotation axis 22,
The painting nozzles 40a to 40d are directed toward the vehicle body 14 in the state shown in FIG. 5, and the front surface of the bonnet is painted.

Next, the swing arm 24 is turned in the direction of arrow B and is also displaced vertically upward by a predetermined amount under the driving action of the lifting motor 26, and then the driving motor 1
8 along the vehicle body 14.
In this case, the painting nozzles 40a to 40d are set in the state shown in FIG. 5 with respect to the bonnet of the vehicle body 14, and the painting work on the bonnet is performed. Furthermore, the coating device 1
0 in the painting direction (arrow A direction), the roof, trunk cover, and rear part of the trunk cover are painted in sequence. Note that the vehicle body 14 can be transported in a direction opposite to the painting direction (direction of arrow A) under the action of the vehicle body transport mechanism 12 if necessary. That is, although the direction of arrow A indicates the moving direction of the coating device 10, instead of moving the coating device 10,
The vehicle body 14 may be transported in the direction of arrow A or in the opposite direction. In the present invention, this is referred to as the conveyance direction of the object to be coated.

Here, a painting nozzle 4 is installed on the painted surface of the vehicle body 14.
Paint patterns 44a to 44d shown in FIG. 4 are formed by the paint 42 sprayed from 0a to 40d. That is, in this embodiment, as shown in FIG. 5, adjacent painting nozzles 40a to 40
Center lines 46a to 4 of the paint 42 sprayed from d
Angle θ and an angle − in the direction of separating 6d from each other
It is tilted by θ. In this case, the main direction of the airflow generated by the paint 42 forming the paint patterns 44a and 44c is the painting direction (arrow A direction).
Also, the coating patterns 44b and 44d
The main direction of the airflow generated by the paint 42 forming the paint 42 is opposite to the painting direction (direction of arrow A) (see FIG. 5). Therefore, adjacent painting pattern 4
Between 4a and 44d, there is no air flow that would affect the coating patterns 44a to 44d as shown in FIG. Therefore, coating patterns 44a to 44d having desired shapes that do not interfere with each other are formed on the painted surface of the vehicle body 14. As a result, a highly accurate painted surface with no unevenness can be obtained.

Furthermore, as shown in FIG.
There is an intersection 50 between d and the painted surface of the vehicle body 14.
The painted surface of the vehicle body 14 has so-called
Paint patterns 44a to 44 arranged in a staggered manner
d is formed. In this case, between adjacent painting patterns 44a and 44b, between 44b and 44c, and between adjacent painting patterns 44a and 44b.
Since the painting nozzles 40a to 40d are arranged so as to be spaced apart from each other in the painting direction (arrow A direction) between 4c and 44d, the paint 42 does not interfere with each other between them, and the thickness of the paint film is uneven. The inconvenience caused by this will be avoided.

Furthermore, in this embodiment, the mounting members 34a and 34c and 34b and 34d are arranged to extend in opposite directions with respect to the second connecting rod 32, as shown in FIG. Painting nozzles 40a to 40d are attached via attachment members 34a to 34d. In this case, the intersection 50 of the center lines 46a to 46d of the paint 42 sprayed from the painting nozzles 40a to 40d is close to the vehicle body 14 side, and the adjacent paint pattern 4
The distances 4a to 44d from each other in the painting direction (direction of arrow A) are set small. As a result, the time differences between the coating patterns 44a to 44d are small, thereby avoiding the occurrence of uneven coating due to differences in drying time. Note that the injection angle 2θ of the paint 42 with respect to the vehicle body 14 is
It is desirable to set the angle within approximately 45° in order to ensure that the spray pressure on the painted surface is above a predetermined level.

[Effects of the invention] As described above, according to the invention, a plurality of painting nozzles arranged in a direction substantially perpendicular to the conveyance direction of the object to be painted are arranged at a predetermined angle with respect to the object to be painted. The paint ejected from adjacent painting nozzles is sprayed onto the object so as to be spaced apart from each other. In this case, since the airflow caused by the paint sprayed onto the object to be painted does not affect the coating pattern on the adjacent object to be painted, a desired coating pattern can be obtained. Further, since adjacent paint patterns are spaced apart from each other, there is no possibility of paint interference between the paint patterns. Moreover, the intersection of the center lines of the paint sprayed from the painting nozzles is set close to the object to be painted, so that when the adjacent painting nozzles are viewed from a direction perpendicular to the direction of conveyance of the object to be painted, To spray paint onto the same painting part of a workpiece without much time difference. As a result, it is possible to obtain a painted surface with extremely high precision and no uneven coating.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the arrangement of coating nozzles in a coating device according to the prior art, Fig. 2 is an explanatory diagram of a coating pattern obtained using a coating device according to another conventional technique, and Fig. 3 is an explanatory diagram of the coating pattern according to the present invention. FIG. 4 is a perspective view of a main part of the coating apparatus shown in FIG. 3, and FIG. 5 is a side view of the painting nozzle shown in FIG. 4. 10...Painting device, 12...Vehicle body transport mechanism, 1
4...Vehicle body, 20...Column, 24...Swivel arm, 28, 32...Connection rod, 34a to 34d
...Mounting member, 40a-40d...Painting nozzle, 42...Paint, 44a-44d...Painting pattern.

Claims (1)

[Claims for Utility Model Registration] In a coating device that performs a coating operation using a plurality of coating nozzles arranged in a direction substantially perpendicular to the conveyance direction of the object to be coated, a first one located on the front side in the coating direction; The spray nozzle of the painting nozzle is arranged inclined at a predetermined angle to the rear side in the painting direction, and is adjacent to the first painting nozzle and on the rear side in the painting direction with respect to the first painting nozzle. The ejection port of the second painting nozzle located at An intersection of the jetting direction center line viewed from a direction perpendicular to the conveyance direction is between the first and second painting nozzles and the object to be coated, and the coating pattern on the object to be coated is spaced apart from the coating direction. the first and second angles
A coating device characterized by being equipped with a coating nozzle.