JPH0122824B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multicolor coating device that automatically selects a required color from among a plurality of paints of different colors and performs coating.

Conventionally used multi-color automatic painting machines that can spray multiple colors of paint separately, each color of paint is pumped from a paint tank and guided to a color-specific paint valve connected to a manifold. , select the color by turning on and off the paint valve,
After replacing the paint, the hose guides the paint to the paint gun, which is permanently attached to the paint sprayer, for painting.

For this reason, the paint color selection device is heavy, and many paint hoses and air hoses for operating paint valves are connected, making the device large. Because it is difficult to assemble and operate near the painting gun attached to the tip of the
The paint valve was fixedly placed on the side of the painting robot, and a long hose communicated the paint valve with the paint gun.

For this reason, with conventional paint sprayers, each time the color is changed and used, not only the paint gun but also the inside of the long hose must be cleaned with detergent such as thinner, which consumes a large amount of thinner. Moreover, much paint remained in the hose and was washed away, resulting in significant waste.

In addition, because the structure is such that paint is sent from a manifold with paint valves for each color to a painting gun via a single long hose, paint of other colors can easily leak from the manifold, causing color mixing. .

Furthermore, when changing colors, it is complicated to change the paint valve, clean with cleaning agent, remove the cleaning agent from the connecting hose with compressed air, and fill the connecting hose with paint of the next color. This method also had the disadvantage of requiring a large amount of time to perform various tasks and reducing productivity.

In order to solve the problems that existed in conventional multi-color paint machines, the present invention connects dedicated paint guns to paint hoses provided for each color.
By sequentially selectively connecting the painting gun to a painting robot, it is possible to provide an excellent multi-color painting device that does not consume cleaning agents or paint, has no fear of color mixing, and shortens the time required to change colors. This is the purpose.

In the multi-color painting device of the present invention that meets this purpose, the paint hoses are provided separately for each color, and a paint gun is provided at the tip of each paint hose, and the paint gun is mounted on a pedestal. A painting robot equipped with a chuck device that grips and operates the paint gun can selectively approach the paint gun with the chuck device and grip the paint gun. It consists of things that are set up like this.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the multicolor coating apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 shows the entire multicolor coating apparatus according to the present invention viewed from the front. In the figure, subscripts a,
b, c, . . . indicate paints of different colors, and the illustrated example shows a case of five colors a, b, c, d, e, but the number of colors may be arbitrary. 1
0a, 10b, 10c, 10d, and 10e are paint supply pipes provided separately for each color, and these paint supply pipes are equipped with paint pressure regulators 20a, 20b, 20c, 20d, and 2, respectively.
Paint supply hoses 30a, 30b, 3 via 0e
One ends of 0c, 30d, and 30e are connected.
In addition, paint supply hoses 30a, 30b, 30c,
The other ends of 30d and 30e are hose reels 40a,
40b, 40c, 40d, and 40e.

Each hose reel 40a, 40b, 40c, 40
d and 40e, as shown in an enlarged cross section in FIG. 2, a drum 42 rotatable with respect to the fixed shaft 41 is attached to the fixed shaft 41 via a bearing 43. A coil spring 44 is interposed between the fixed shaft 41 and the drum 42, and one end of the coil spring 44 is engaged with the drum 42 and the other end is engaged with the fixed shaft 41 side.
By giving an initial torsional displacement to itself,
The drum 42 is biased to rotate. Further, a swivel joint 45 is attached to one end of the drum 42, the paint supply hose 30 is connected to one end of the swivel joint 45, and a paint supply hose 30 is connected to the other end of the swivel joint 45. A hose 31 is connected. The paint hose 31 is wound around the drum 42 which is biased to rotate, thereby applying tension in the winding direction to the paint hose 31.

Each of the above hose reels 40a, 40b, 40c,
Paint hose 31a connected to 40d and 40e,
Painting guns 60a, 60b, 60 are installed at the ends of the long hoses 31b, 31c, 31d, and 31e.
c, 60d, 60e are connected, and each of the above paint hoses 31a, 31b, 31c, 31d, 31
Regulating rollers 50a, 50b, 50c, 50d, 5 are provided at intermediate positions between the hose reel 40 and the painting gun 60 (e) to restrict the hose from deflecting laterally.
0e is provided, and the hose 31 is connected to the roller 50.
Only movement in the horizontal direction is allowed in some areas.

Each of the above painting guns 60a, 60b, 60c, 6
0d, 60e are hooks 71a, 71b, 71c, 7 attached to a tilted and fixed pedestal 70.
1d, 71e and are supported and arranged so that they can be removed or installed in the vertical direction. Also,
As shown in an enlarged cross-section in FIG. 3, this paint gun 60 is composed of a body 61, a piston part 62 for intermittent paint discharge, a paint atomizing part 63, and a chuck part 64, and the paint hose 31 is connected to the paint inlet 65 and the atomizing air inlet 66
and a pilot air inlet 67 for a piston for intermittent paint discharge. Of these, the atomizing air inlet 66 and the pilot air inlet 67 of the paint discharge intermittent piston are open to the chuck portion 64 of the coating gun 60.

On the other hand, the hooks 71a, 71b, 71c, 7
In the vicinity of 1d and 71e, preferably in the front position,
A painting robot 100 is installed. The painting robot 100 includes a manipulator-type moving device 80 and a chuck device 90 attached to a wrist portion 82 provided at the tip of an arm portion 81 of the moving device 80.

Of these, the chuck device 90 is a gripping device that grips and operates the coating gun 60, and its cross section is shown enlarged in the lower half of FIG. As shown in the figure, the chuck device 90 has a finger 92 that opens and closes using chuck pilot air supplied from a chuck pilot air supply port 91, an atomizing air supply port 93, an airtight O-ring 94, and a paint. Pilot air supply port 95 of piston for discharging intermittent
and the airtight O-ring 96 are connected to the painting gun 6.
The atomizing air inlet 66 is provided in the chuck portion 64 of the paint discharger 1, and the pilot air inlet 67 of the paint discharge intermittent piston is connected to the atomizing air inlet 66.

Further, the operation of the moving device 80 is controlled by a control device (not shown), and after moving the chuck device 90 onto the pedestal 70, it performs a predetermined painting operation on the painted object (not shown). is programmed to do so.

Next, the coating operation of the multicolor coating apparatus having the above configuration will be explained.

First, paint supply pipes 10a, 10b, 10c,
When painting an object with paint of a predetermined color supplied from 10d and 10e, for example, paint supplied from paint supply pipe 10a, the moving device 80 is operated by the control device (not shown), and the arm The part 81 and the wrist part 82 rotate, and the chuck device 90 stops at a position below the coating gun 60a. Next, the arm portion 81 of the moving device 80 is raised in accordance with the program of the control device, and the finger 92 of the chuck device 90 is fitted into the chuck portion 64 attached to the coating gun 60a. At this time, an air supply valve (not shown) in the moving device 80 is activated, and chuck pilot air is supplied to the chuck pilot air supply port 91, the fingers 92 are closed, and the chuck part 64 is clamped and painted. Gun 60a and moving device 80 are connected. Through this connection, the atomizing air inlet 66 provided in the chuck portion 64 of the coating gun 60a and the atomizing air supply provided in the finger 92 of the chuck device 90 attached to the moving device 80 are connected. The port 93 is connected to the pilot air inlet 67 of the piston for intermittent paint discharge and the pilot air supply port 95 of the piston for intermittent paint discharge are hermetically connected to the airtight O-rings 94 and 96 provided on the finger 92. be done.

Subsequently, the arm section 81 and the wrist section 82 rotate, and the painting gun 60a is pulled out vertically upward from the hook 71a provided at a predetermined position on the pedestal 70. 60a moves along a predetermined trajectory and the object to be coated is coated.
In this case, the paint is supplied from the paint supply pipe 10a, the pressure is regulated by the paint regulator 20a, and the paint is introduced into the paint gun 60a from the paint supply hose 30a through the swivel joint 45 provided on the hose reel 40a and the paint hose 31a. The paint guided to the port 65 is supplied by operating an air supply valve (not shown) of the moving device 80 to supply pilot air for intermittent paint discharge to the pilot air supply port 95 for intermittent paint discharge of the finger 92. While intermittently discharging the paint, atomizing air is simultaneously supplied to the atomizing air supply port 93, and the intermittently discharged paint is sprayed onto the object to be coated.

At this time, the paint hose 31a connected to the paint gun 60a is always given a constant level of tension by the action of the rotary drum 42 and bearing 43 of the hose reel 40a, making it expandable and retractable. A wide range of painting operations is possible, and the paint hose 31a is connected to other paint hoses 31 by cooperation with the regulating roller 50a.
b, 31c, 31d, and 31e, or the paint hose 31a is prevented from becoming sagging during the painting operation and coming into contact with the object to be painted.

Next, when switching to painting with a paint of another color, the arm portion 81 and wrist portion 8 of the moving device 80 are
2 rotates and the painting gun 60a is returned to its original hook 7.
1a, the chuck pilot air is discharged, and the moving device 80 and the painting gun 60a are separated. Subsequently, in order to perform painting in another color, the moving device 80 is activated based on the program of the control device.
, and rotates the arm portion 81 and wrist portion 82 to move the chuck device 90 to a lower position of one of the paint guns 60b, 60c, 60d, and 60e to which paint of the next color is supplied. Then, in the same manner as with the painting gun 60a, the chuck device 90 and the painting gun are connected to perform painting work. After that, the operation similar to the above will be repeated.

As described above, according to the present invention, dedicated painting guns are provided at the tips of the paint hoses provided for each color and are arranged on a pedestal, and the painting robot is provided with a chuck device that is operated by gripping the painting guns. Therefore, there is no need to switch paint valves or wash with cleaning agents when changing colors, and colors can be changed in a short time without wasting paint or cleaning agents. In addition, paint hoses are provided for each color,
Since it does not have a paint passage that is used for multiple colors, color mixing of paints does not occur at all. Furthermore, with the device of the present invention, painting can be performed by simply extending the paint hose without moving the color switching device, making it possible to greatly contribute to simplification of painting work, expansion of the range of painting work, and automation. .

In addition, in the present invention, the paint hose is given winding tension by being wound around a hose reel that is attached with a coil spring and given rotational force, and is further provided with pilot air for intermittent paint discharge and air for atomization. Since air is supplied to the painting gun from a chuck device attached to the moving device, each air supply hose can be fixed to the moving device, preventing the hoses from getting tangled or sagging. It is possible to provide a high-performance multicolor coating device that does not come into contact with objects.

[Brief explanation of drawings]

Fig. 1 is an overall front view of a multicolor coating device according to an embodiment of the present invention, Fig. 2 is an enlarged cross-sectional view of the hose reel portion of the device shown in Fig. 1, and Fig. 3 is a coating gun and chuck device. FIG. The meanings of the main symbols in the figure are as follows. 10a, 10b, 10c, 10d, 10e...
Paint supply piping, 31a, 31b, 31c, 31
d, 31e...Paint hose, 40a, 40b, 4
0c, 40d, 40e...Hose reel, 60
a, 60b, 60c, 60d, 60e...painting gun, 66...air inlet for atomization, 67...pilot air inlet for intermittent paint discharge, 70...pedestal,
71a, 71b, 71c, 71d, 71e... hook, 80... moving device, 90... chuck device,
93...Air supply port for atomization, 95...Pilot air supply port for intermittent paint discharge, 100...Painting robot.

Claims (1)

[Claims] 1. Equipped with paint hoses separated by color,
Each of the paint hoses is equipped with a paint gun at its tip, and the paint guns are removably arranged on a pedestal. 1. A multi-color coating device, characterized in that a chuck device is installed so as to be selectively connectable to the coating gun. 2. The multicolor coating device according to claim 1, in which each paint hose is wound around a hose reel that is biased to rotate, thereby being given tension in the winding direction. 3. In the multi-color coating device according to claim 1, the coating gun is provided with a pilot air inlet for intermittent paint discharge and an air inlet for paint atomization, and the chuck device is provided with a pilot air inlet for intermittent paint discharge and an air inlet for paint atomization. An air supply port and an air supply port for paint atomization are provided,
When the paint gun of the chuck device is gripped, the pilot air inlet and the pilot air supply port are connected, and the paint atomizing air inlet and the paint atomizing air supply port are connected, respectively.