JPH044840Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a rotary device for a painting robot in a rotary spray painting robot that performs painting by continuously rotating a spray gun.

<Prior Art> Conventionally, one spray device is usually installed in a painting robot. Also, Utsukai Showa 58-
Some spray devices are equipped with multiple spray devices, as shown in Publication No. 119871, but in this case, each is fixed to the tip of the robot's arm, and can be used depending on the coating conditions (for example, spray devices with different patterns can be used). (or spraying different colors of paint), and spraying at the same time to expand the spray area.

In addition, in conventional painting robots, the attachment part of the spray gun can be rotated to change the direction of the spray, and there are also painting robots with rotatable wrists, but these robots do not rotate continuously during spraying. Therefore, it is difficult to obtain a uniform coating finish over the entire area, especially on objects with many irregularities.

Of course, having a painting robot perform many controls requires a lot of effort and time to train and operate, reduces productivity, and there are limits to the robot's operation, so it is not always necessary to perform sufficient spray control. This may result in uneven paint finish, etc.

<Problems to be solved by the invention> In view of the above-mentioned circumstances, the purpose of the present invention is to provide a rotary device for a painting robot that can continuously rotate a spray gun in forward and reverse directions during spraying using a simple transmission mechanism. This is what I did.

<Means for solving the problem> The present invention includes a plurality of gun mounting stays protruding from a rotating shaft having paint and air passages at the tip of an arm of a painting robot, and a plurality of gun mounting stays protruding from the rotating shaft at the tip of the arm of a painting robot. A spray gun is mounted on a mounting arm that extends symmetrically around the center of the spray gun, and the output shaft of an air drive motor that can be switched between forward and reverse rotation is transmitted between the rotation shaft and the output shaft of an air drive motor that can be switched between forward and reverse rotation based on a command signal from a painting robot that is also installed at the tip of the arm. The configuration is such that they are connected by a device.

<Function> Due to the above configuration, when the forward/reverse drive air motor rotates, the rotating shaft rotates via the transmission gear, the gun mounting stay attached to the rotating shaft rotates, and the spray gun accordingly rotates. is continuously rotated, paint and compressed air are introduced from the paint passage and air passage arranged on the rotating shaft through the paint hose and the air hose, and the paint is applied from the spray gun to the coating material located on the axis of the rotating shaft. It is sprayed onto objects and paints them. In this case, in the case of complex-shaped objects for which painting is insufficient with continuous rotation of the spray gun in one direction, the forward and reverse drive air motor is continuously rotated in the reverse direction, and the rotary rotation of the spray gun is accordingly reversed to coat the object. By continuously rotating the spray gun in one direction, the paint would not penetrate and the coating would not be sufficient, but by continuously rotating the spray gun in the opposite direction, it is possible to spray from the opposite side, improving the characteristics of paint penetration. And all areas can be painted.

<Example> Hereinafter, the present invention will be described in detail based on the drawings of the example.

Reference numeral 1 denotes a rotary union serving as a rotary joint provided at the tip of a robot arm 3 disposed at the upper end of the robot body 2. A rotary shaft 5 supported by a bearing 4 attached to the rotary union 1 is disposed in the center. Mounting stays 6, 6 extend in symmetrical positions at the tip of the rotating shaft 5.
are fixedly protrudingly provided, and spray guns 7, 7 are attached to the end attachment arms 6a, 6a of the attachment stays 6, 6. In addition, a forward/reverse drive air motor 9 is installed in parallel with a fitting 8 on the rotating union 1, and a drive gear 10 serving as a transmission device is connected to the output shaft 9a of the air motor 9.
is fixed, and the transmission gear 11 of the meshing of the drive gear 10 is fixed.
are attached to the rotating shaft 5 and integrated. Reference numeral 12 denotes a paint passage formed at the center of a rotating shaft 5 with a paint supply port 12a at the base end disposed on the rotating union body 1 side, and connected to the spray gun 7 via a paint hose 13 from a paint outlet 12b at the tip. In addition, an air passage 14 is formed around the periphery of the rotating shaft 5 with the air supply port 14a at the base end disposed on the side of the rotating union main body 1a, and an air hose 15 connected to the air outlet 14b is connected to the spray gun 7. be.

Next, to explain this operation, first, the forward/reverse air motor 9, which is controlled by a command signal from the robot body 2, rotates, and the transmission gear 1 is engaged with the drive gear 10, which is a transmission device attached to the output shaft 9a.
Since the rotating shaft 5 integral with 1 rotates, the rotating shaft 5
The spray guns 7, 7 of the mounting arms 6a at the tips of the mounting stays 6, 6 which protrude more symmetrically 1 rotate as a whole in a rotary manner, and the coating material A is sprayed from the nozzle ports 7a, 7a onto the object to be coated (not shown). ) is painted by continuous forward rotation. In this case, the paint and compressed air are supplied to the rotating shaft 5 from the dual-channel rotating union 1.
Since the rotary device is introduced into the spray gun 7 through the air and is operated by the blown air, the weight of the rotary device can be reduced.

Here, in the case of complex-shaped objects with many irregularities for which spraying by continuous forward rotation from the same direction of rotation is insufficient, the complex-shaped object can be coated by rotating the air motor 9 in the reverse direction with a predetermined command signal. Since the object is sprayed from the opposite side, the paint penetrates easily and can be applied to all areas.

<Effects of the invention> As mentioned above, the rotary device for painting robots of the present invention has a spray gun disposed on the mounting arm at the tip of the gun mounting stay protruding at a position symmetrical to the rotation axis, and a paint passage arranged on the rotation axis. The robot is configured to connect the air passage and the spray gun with a paint hose and an air hose to supply paint and compressed air to the spray gun, respectively, and is equipped with an air motor that rotates forward and backward in response to command signals from the robot body. Therefore, the air motor is rotated forward or reverse depending on the shape of the object to be coated.
As a result, the spray gun rotates in the forward direction and changes the direction of paint injection, resulting in a uniform film thickness, preventing unpainted areas, and improving the quality of the paint finish. Furthermore, since it becomes possible to paint in the proper spraying direction, paint scattering is prevented, the spray painting area is expanded, and the operating range of the robot can be reduced, thereby greatly increasing the painting ability. Furthermore, the transmission device that performs forward and reverse rotation has a simple configuration in which the drive gear placed on the output shaft of the air motor meshes with the transmission gear placed on the rotating shaft, so it can be a small rotary configuration that does not malfunction. be effective.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway side view of the rotating union part and its tip, and FIG.
The figure is a sectional view of the rotating union part, and FIG. 3 is a side view of the installed state. 1...Rotating union, 2...Robot body, 3
...Robot arm, 5...Rotating shaft, 6...Mounting stay, 7...Spray gun, 9...Forward/reverse drive air motor, 9a...Output shaft, 10...Drive gear, 11...Transmission gear.

Claims (1)

[Scope of claim for utility model registration] 1. A rotating shaft is placed at the end of the arm of a painting robot,
A gun mounting stay is protrudingly provided at the tip of the rotating shaft and extends in a symmetrical position with respect to the rotating shaft, a spray gun is attached to each mounting arm provided at the tip of the gun mounting stay, and the spray gun and the rotating shaft are connected to each other. The paint passage and air passage provided are connected by a paint hose and an air hose, respectively, and the output shaft of a forward/reverse drive air motor provided at the tip of the arm is connected to the rotary shaft by a transmission device. Rotary device for robots. 2. The rotary device for a painting robot according to claim 1, wherein the rotating shaft has a paint and air passage. 3. The rotary device for a painting robot according to claim 1, wherein the forward and reverse drive air motor can be switched between forward and reverse directions according to a command signal from the painting robot.