JPS61129060A - Paint coating apparatus - Google Patents

Abstract

PURPOSE:To eliminate coating irregularity by certainly coating even an uneven area, by providing a paint spray mechanism and a paint leveling applicator moving so as to follow said spray mechanism to the leading end of a robot arm. CONSTITUTION:A primer coating apparatus T moves to the direction shown by the arrow S along the coating area such as the window opening edge 15 of a car body on the basis of the teaching information of a robot. In this state, the primer emitted from the supply pipe 64 of a paint spray mechanism 60 is at first into mist by nitrogen from a supply pipe 65 and injected to the coating area from the opening of a jet pipe 61. Subsequently, a brush 50 is slide with the primer adhered area to perform the leveling of the primer. At this time, the brush 50 is pressed in a freely extensible and contractible manner by a floating mechanism 30a nd can be allowed to follow the coating area by the pressing force of a leaf spring 51.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paint applicator, and more particularly, to a paint applicator in which paint is automatically applied by a robot.

In recent years, for example, when a car window glass is attached to a car body using an adhesive, a paint commonly called a primer is applied to the window glass of the car body and/or the edge of the window opening in advance in the process before applying the adhesive. is applied.

This primer is a paint that contains an auxiliary agent to improve the adhesion of the adhesive and uses ethyl acetate or the like as a solvent. The primer coating operation is performed by, for example, attaching a paint applicator to the tip of a robot arm and supplying the primer to the paint applicator in a targeted manner.

[Conventional technology]

As an example of this type of paint applicator, there is a primer applicator 1 as shown in FIG.
No. 6). This primer coating device 1 includes a pneumatic cylinder 4 for cushioning provided at the tip of an assistant robot arm via a base member 3, and a pair of clampers 5 on a piston rod 4a of the pneumatic cylinder 4, which are opened and closed by pneumatic pressure. It is equipped with a clamping mechanism 6 that fits 5"i
A bar 5 grips the brush, and the clamper 5 is provided with a nozzle 9 for impregnating and supplying primer P to the brush 7 through a primer supply tube 8. It is applied.

[Problem that the invention seeks to solve]

However, with such a conventional paint applicator 1, when coating a smooth surface such as the window glass 10, it is possible to apply the coating evenly, but for example, when coating a smooth surface such as the window glass 10, it is possible to apply the coating evenly. When applying to a site with welding dents, etc., the primer P is sufficiently applied, resulting in uneven coating. As a result, there are problems in that the adhesive strength of the window glass decreases and watertightness becomes poor.

The present invention has been made in view of the above-mentioned problems, and its purpose is to ensure that the paint is applied to the paint application area even if the area is uneven. The goal is to eliminate paint spots.

[Means for solving the problem] The means includes a spraying mechanism that is attached to the tip of a robot arm and sprays the paint into a mist onto the application area, and a spray mechanism that moves following the spraying mechanism and sprays the paint onto the application area. By means of a paint applicator equipped with an applicator for leveling and applying the paint.

[Effect]

Based on the robot's teaching information, the paint application device moves over the application area.At this time, the spraying mechanism sprays paint, and the applicator that follows the spraying mechanism levels and applies the paint that has adhered to the application area. do.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 3 is an explanatory diagram showing an example of a primer coating system for an automobile. In FIG. 3, the car bodies are conveyed by a conveyor 21 and positioned when they reach the coating position.

A robot R having a multi-flash contact robot arm rib is installed in the work area near the conveyor 21, and a primer coating device T is attached to the tip of the robot arm Ra, and the robot H Nearby are a primer tank n1 that tops off the primer P, a pump n1 that pumps the primer P in the primer tank n to the primer coating device T, and a nitrogen gas cylinder that supplies nitrogen gas to the primer coating device T and the primer tank n. 24. A primer solidification prevention device 3 is arranged to prevent the primer P adhering to the primer coating device T from solidifying when the primer P is not applied. The robot R moves the primer coating device T along the window opening edge 15 of the vehicle body based on predetermined teaching information, and applies the primer P to the window opening edge 15. still,
The reason why nitrogen gas is used in this system is to prevent deterioration of the primer P due to moisture in the atmosphere.

In this system, the primer application MINT is
As shown in the figure, it includes a floating mechanism 30, a clamp mechanism 40, a brush 50, and a paint spraying mechanism mark.

The 70-teating mechanism concave includes a cylinder 31, a piston 32 that slides on the cylinder 31, and a piston 32 that slides on the cylinder 31.
It is equipped with a piston rod that is attached to and projects from the cylinder 31, and a spring that constantly biases the piston 32 in the direction in which the piston rod projects. It is attached to the tip of the robot arm. Incidentally, reference numeral 36 is a slide bearing that fits inside the cylinder 31 and on which the piston rod slides. In addition, the above cylinder 3
A lid 37 is attached to the lid 37, and the lid 37 is provided with connectors C, , C, , C, a pipe 26 extending from the okara pump for pumping the primer P, and a pipe extending from the gas cylinder 24. I and air pipe 4 are connected to each other.

Further, the clamp mechanism 40 is attached to the tip of the piston roller of the 70-ting mechanism (9),
A mechanism 43 connects a pair of clamp arms 42a and 42b to the piston rod 41a of the driving air cylinder 41.
I connected it with , and I did it. The above driving air cylinder 41
is a spring 45 that always urges the piston in the protruding direction.
In addition, as the piston 44 is moved back by air pressure from an air pipe 47 extending from the connector C3 to the pressure chamber 46, the clamp is moved back against the urging force of the spring 45. Arm 42a
.

42b is closed. It should be noted that this is an air release hole opened in a pressure chamber 49 in which a spring 45 from the company No. 48 is housed. Furthermore, the clamp arm 42a,
Husband & brush clampers 49a and 49b are attached to 42b with bolts, etc., and the brush clampers 49a,
49b is adapted to pinch and hold C+-50 when the clamp arms 42a and 42b are closed.

Further, as shown in FIG. 4, one brush clamper 49b K is attached to the leaf spring 51 by fixing its base end 52 with a screw or the like.
The more protruding parts are a pair of flexible parts 54a separated by a notch 53 from the tip.

54b, and one side 50 of the brush 50, respectively.
Press a.

Furthermore, as shown in FIGS. 1 and 5, the paint spraying mechanism 60 is built into the other brush clamper, and includes a spray pipe 61 that is open at one end and closed at the other end.
A primer P supply nozzle 62 is inserted and arranged from the other end of the injection pipe 61 to be closed, and a gas pipe B opening near the end of the nozzle 62 is provided by penetrating the side wall of the injection pipe 61. The opening 61a of the injection pipe 61 projects toward the end 59 of the brush clamper 49a and faces the primer P application area. A tube extending from the connector C1 is connected to the primer P supply nozzle 62, and a tube 65 extending from the connector C1 is connected to the gas pipe. When the primer P and nitrogen gas are supplied to the paint spraying mechanism mark, the primer P becomes atomized and is sprayed from the opening 613-.

In addition, in the above system, the primer solidification prevention device 2
5ti, as shown in FIG. 3, a container 57 is attached to a support stand 56, and when the primer coating device T is not applying, the primer coating device T is moved based on the teaching information of the robot) H. , the brush 50 held by the clamp mechanism 40 and the paint spraying mechanism 60 are placed in the container 5.
7 and is sealed with the lid 37 of the primer coating device T to prevent the primer P attached to the brush 50 etc. from drying out.

Therefore, according to the primer coating device T according to this embodiment, the primer coating device T moves in the direction of the arrow S in FIG. 1 along the window opening edge 15 of the vehicle body based on the teaching information of the four pots. .

That is, the bee clamper 49a has a built-in paint spraying mechanism mark.
t- face forward, and move the brush 50 to follow this. In this state, c) r50 is always urged in the direction in which the piston rod protrudes by the holding mechanism recess 70, and is pressed against the window opening edge 15 in a freely retractable manner.

First, the primer P is sprayed from the paint spraying mechanism 60, but in this case, as shown in FIG. The liquid is then injected from the opening 61a of the injection pipe 61 onto the window opening edge 15. At this time,
Even if the window opening edge 15 does not have any unevenness due to spot welding marks or panel joints, the base and primer P are in the form of a mist and will adhere evenly to the uneven parts.

Next, the brush 50 slides into contact with the area to which the primer P is attached. In this case, since the primer P is leveled by the brush 50, the surface to which the primer P is applied becomes smooth and a good parting line can be obtained. Further, at this time, since the bee 50 is elastically pressed by the floating mechanism, it can follow even if the window opening edge 15 is curved. It looks like this, and the above brush 5
Since it is pressed against the window opening edge 15 by the oFi plate spring 51, its followability is even better, and even if the brush 50 wears out and decreases, the injection pipe 61 will not be damaged. The gap δ between the opening 61a and the coating surface is maintained at a predetermined value.

Furthermore, since the leaf spring 51 has a pair of flexible portions 54a and 54b separated by the notch 53,
As shown in FIG. 6, the panel seam 7 at the window opening edge 15
0 is formed along the longitudinal direction, and even if there are heights on the panel surface, if the cut portion 53 is made to correspond to the seam 70 and the brush 50 is brought into sliding contact, the bending portion 54a, Since the brush 54b presses the brush 50 against the panel surface while bending corresponding to the height of the panel,
The followability is that much better, and the primer P is evenly applied. Incidentally, since the primer P sprayed by the paint spraying mechanism 60 is attached to the seam 70 as described above, no uneven coating occurs.

Furthermore, when the brush 50 is worn out and it is time to replace it, the air pressure of the clamp mechanism is released, the piston is made to protrude by the force of the spring 45, the clamp arms 42a and 42b are opened, and the grip on the brush 50 is released. Just do it.

In the above embodiment, the clamp mechanism 40 is used as the applicator.
Although the brush mark is shown as being held by a roller, it is not necessarily limited to this, and for example, a roller that transfers the application surface may be used, and it may be modified as appropriate. In addition, in the above embodiment, a clamping mechanism holder is provided for gripping the brush 50, making it possible to replace the brush 50; Further, although the above embodiment includes a 70-ting mechanism (equipment) and a leaf spring 51, it is not necessarily limited to this.
You may change it as appropriate. Furthermore, although the paint spraying mechanism 60 is built into the brush clamper 49H in the above embodiment, it is not necessarily limited to this, and may be provided separately. Further, the configuration of the paint spraying mechanism 60 is not limited to that described above, and the configuration may be changed as appropriate. Further, although the above embodiments are applied to a primer coating system for installing automobile window glass, the present invention is not necessarily limited to this, and it goes without saying that the present invention can be applied to various paint coating systems. be.

〔Effect of the invention〕

As explained above, the paint according to the present invention can be reliably applied without leaving any uncoated paint.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view showing a primer coating device according to an embodiment of the present invention, FIG. 2 is a front view showing an example of a conventional paint coating device, and FIG. Fig. 4 is a perspective view showing the installation state of the leaf spring, Fig. 5 is a sectional view showing the structure of the paint spraying mechanism, and Fig. 6 is a perspective view showing the structure of the paint spraying mechanism. It is a perspective view showing an effect. P... Primer (paint) R... Robot Ra... Robot arm 1, T... Primer coating device (paint coating device) 15.
・・Window opening edge (paint application area) ・Vehicle body 30 ・Floating mechanism light ・Clamp mechanism 50 ・Brush 51 ・Plate spring 60 ・Paint spraying mechanism Patent applicant Nissan Motor Co., Ltd. Co., Ltd. Applicant: Sunrise Meisei Co., Ltd., C. Ro-; Attorney, Patent Attorney: Hiroto Tsuchihashi, 1 No. 2 @ 5 Shoney 3 Figure 5

Claims (2)

[Claims] (1) Equipped with a spraying mechanism that is attached to the tip of the robot arm and sprays paint in the form of a mist onto the application area, and an applicator that moves to follow the spraying mechanism and levels and applies the paint on the application area. A paint application device characterized by: (2) The paint according to claim 1, wherein the applicator comprises a brush that comes into contact with the application area and a clamp mechanism that is attached to the tip of the robot arm and that grips the brush. Coating device.