JPH0685059U - Inner coating machine - Google Patents

Abstract

(57) [Summary] [Purpose] To enable internal coating of objects with narrow frontage. [Structure] In a single pipe 1 which is the main body of the extension A, two paint pipes 5 communicating respectively with the two paint ports 10 of the body 8 are inserted, and around the paint pipe 5. An air passage 6 that communicates with the air port 11 is configured. At the tip of the pipe 1, a mounting portion 21 facing forward in the axial direction and a mounting portion 22 facing sideways at a right angle to the axial line.
The head 20 formed with and is attached to each of the mounting portions 21, 2
2, a paint supply port 23 communicating with each paint pipe 5 separately,
An air supply port 24 communicating with the air passage 6 is opened. A nozzle 25 having a paint ejection port and an air ejection port is attached to each of the attachment portions 21 and 22. The extension A is mounted coaxially with the output shaft 27 of the coating robot.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inner surface coating machine which is mounted on an output shaft of a coating robot and is used for coating the inner surface of a box-shaped object to be coated while rotating and moving around the axis of the output shaft.

[0002]

[Prior art]

 As shown in FIG. 6, a conventional inner surface coating machine of this type has a nozzle d at the tip of an extension c in which a paint supply passage and an air supply passage are formed inside, and a nozzle d at the front in the axial direction of the extension c. Equipped with a front coating gun a and a side coating gun b mounted sideways at right angles to the axis. Each gun a, b is attached to the output shaft e of the coating robot. It is known to be mounted on both sides of the axis f.

[0003]

[Problems to be solved by the device]

 Since the conventional inner surface coating machine has a structure in which two guns a and b are arranged side by side on both sides of the axis f of the output shaft e of the coating robot as described above, the nozzle d of the side coating gun b is It is located away from the axis f of the output shaft e of the robot, which is the center of rotation, and rotates with a large radius. On the other hand, in order to perform coating, a certain distance from the nozzle to the surface to be coated is required for coating. Since it is necessary, it has a drawback that it cannot be used for a box-shaped article having a narrow frontage.

Further, since the position of each nozzle d is deviated from the axis line f of the output shaft e of the coating robot, there is a drawback that teaching of movement control of the robot is difficult.

In order to facilitate the teaching of the coating robot, either the front coating gun a or the side coating gun b is attached with its axis aligned with the axis f of the robot output shaft e. However, if the axis of the front coating gun a is aligned, the disadvantage of not being able to handle objects with a narrow frontage becomes more noticeable. If the axis of the side coating gun b is aligned, Since the nozzle d of No. 3 rotates with a large radius, the nozzle d becomes a hindrance and the point of the frontage becomes a problem in another meaning, and the coating surface of the portion corresponding to the center of rotation of the nozzle d is painted. It is clear that there are problems such as leaving and it is not an effective solution.

[0006]

[Means for Solving the Problems]

 The inner surface coating machine of the present invention has been devised in view of the above points, and at the tip of an extension having at least one paint supply passage and one air passage formed therein, the extension A nozzle facing the front in the axial direction is provided, and a nozzle facing the side substantially perpendicular to the axis is provided on the side surface of the extension.

[0007]

[Action]

 When the rear end of the extension is coaxially attached to the output shaft of the painting robot and the output shaft is rotated, the extension rotates around its axis, and the nozzle at the tip of the extension that faces the axial front of the extension also The nozzle, which is oriented almost at a right angle to the axis of the nozzle, also rotates about the axis of the extension, and the coating material is ejected from the nozzles of the nozzles. The front surface to be coated is mainly applied to the side surface to be coated by a nozzle that faces the side substantially perpendicular to the axis.

If a separate paint supply path is provided to each nozzle in the extension, the amount of paint sprayed from each nozzle can be adjusted individually or one spray can be sprayed according to the shape of the object to be coated. By appropriately stopping the coating, it is possible to obtain a uniform coating film thickness and prevent waste of paint.

[0009]

[Effect of device]

 That is, according to the present invention, the extension is integrated into a single unit, and the tip of the extension is provided with a nozzle facing forward in the axial direction of the extension, and the side face of the extension is provided with a nozzle facing laterally substantially perpendicular to the axial line. Due to this structure, by mounting the extension coaxially with the output shaft of the painting robot, it is possible to rotate the nozzle facing the side with a small radius around the axis of the extension, resulting in a narrow frontage. Even with a box-shaped object to be coated, the spray distance, which is the distance between the nozzle and the surface to be coated, can be sufficiently secured, and it can be applied to the coating of such an object having a narrow frontage.

Further, since the position of the nozzle is on the axis of the output shaft of the robot or in the vicinity thereof, there is an effect that teaching of movement control of the coating robot can be easily performed.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 is an elongated pipe that serves as the main body of the extension A, and on the rear end side thereof, as shown in FIG. 2, two paint passages 3 are provided at the center of the interior and between them. As shown in FIG. 3, a connector 2 having an air passage 4 is fitted to the upper part of the connector, and a long and narrow paint pipe 5 is connected to the front surface of each paint passage 3 of the connector 2. Further, both paint pipes 5 are fitted into the pipe 1 so that an air passage 6 is formed in the space between the pipe 1 and the paint pipes 5.

On the rear surface side of the above-mentioned connecting body 2, of the body 8 in which two paint ports 10 into which the joints 9 are respectively fitted are formed on the rear surface and one air port 11 is formed on the side surface, A connecting portion 12 projecting from the front surface is connected to the rear surface of the connecting body 2 with a space provided therebetween by a retaining nut 14 so as to keep the surroundings airtight. The paint passages 16 that are separately communicated with each other and open to the front surface of the connection portion 12 are separately connected to the paint passages 3 of the connection body 2 by the connection pipes 17, and the air passages 18 that are communicated with the air ports 11 are It communicates with the air passage 4 of the connecting body 2 through the space between the body 8 and the connecting body 2.

On the tip side of the above-mentioned pipe 1, a head 20 provided with a mounting portion 21 facing forward in the axial direction of the pipe 1 and a mounting portion 22 facing sideways at a right angle to the axis is mounted. ing.

At the center of the tip surface of each mounting portion 21, 22 of the head 20, a paint supply port 23 connected separately to each paint pipe 5 in the above-mentioned pipe 1 is opened, and each paint An air supply port 24 connected to the air passage 6 in the pipe 1 is opened to the side of the supply port 23.

At each of the mounting portions 21 and 22 of the head 20, there are provided a paint ejection port for communicating with the paint supply port 23 to eject the paint, and an air for communicating with the air supply port 24 for promoting atomization. Nozzles 25 having air jets for jetting are attached respectively.

As shown in FIG. 4, the body 8 of the extension A having such a structure has the axis of the pipe 1 aligned with the axis 28 of the output shaft 27 of the coating robot, as shown in FIG. It is attached to the attachment portion 29.

Next, the operation of this embodiment will be described. When the tip of the extension A is put into the box-shaped object to be coated H and the output shaft 27 of the coating robot is rotated, the extension A rotates about the axis 28, and the front attached to the tip is moved. Both the facing nozzle 25 and the laterally facing nozzle 25 rotate about the axis A of the extension A.

During that time, the paint that has been pressure-fed to each paint port 10 of the body 8 is supplied in two systems from the paint passages 16 and 3 in the body 8 and the connector 2 to the paint pipe 5 in the pipe 1. The air supplied to the paint supply ports 23 of the respective mounting portions 21 and 22 of the head 20 through the passage and pumped to the air port 11 is supplied to the air passage 18 inside the body 8 and the connection body 4. 4 to the air passage 6 formed in the pipe 1 and is supplied to the air supply port 24 of each mounting portion 21 and 22 through one system of air supply passage, and the paint from the paint ejection port of each nozzle 25 is supplied. The flow is ejected while being atomized by the air from the air ejection port, and the nozzle 25 facing the front mainly of the inner surface of the box-shaped object H to be coated and the nozzle 25 facing the side thereof mainly The sides are painted.

As described above, according to the present embodiment, the extension is integrated into one, and the nozzle 25 at the tip of which is directed forward in the direction of the axis line 28 of the extension A, and the lateral side perpendicular to the axis line 28 are provided. Since the structure is such that the facing nozzles 25 are attached, it is possible to rotate the laterally facing nozzles 25 with a small radius around the axis line 28 of the extension A, whereby a box-shaped object having a narrow frontage can be provided. Even in this case, the spray distance, which is the distance between the nozzle 25 and the surface to be coated, can be sufficiently secured, which is sufficient.

Further, since the front nozzle 25 is located on the axis 28 of the output shaft 27 of the painting robot and the side nozzle 25 is located very close to the axis 28, teaching of robot movement control is easy. You can do it.

In the above embodiment, the common air supply path to each nozzle 25 is one system, but it may be two systems like the paint supply path.

FIG. 5 shows another embodiment of the present invention, in which the pipe 1 and the two paint pipes 5 of the above embodiment are divided in the middle and a paint hole 31 and an air hole 32 are provided therebetween. A transparent intermediate block 30 is intervened, and a boss 33 facing the radial direction of the pipe 1 is projectingly provided in this intermediate block, and the boss 33 communicates with one of the paint holes 31. An air supply port 24 communicating with the port 23 and the air hole 32 is formed, and the nozzle 25 is attached as in the above embodiment.

In this embodiment, since the two nozzles 25 facing the side are attached at intervals, it is possible to efficiently coat the inner surface of the box-shaped object having a deep depth.

[Brief description of drawings]

FIG. 1 is a sectional view of an extension according to an embodiment of the present invention.

FIG. 2 is an end view taken along line XX of FIG.

FIG. 3 is an end view taken along line YY of FIG.

FIG. 4 is an overall external view of the present embodiment.

FIG. 5 is a sectional view of an extension according to another embodiment of the present invention.

FIG. 6 is an overall external view of a conventional example.

[Explanation of symbols]

H: Object to be coated A: Extension 1: Pipe 5:
Paint pipe 6: Air passage 8: Body 20: Head 21, 22: Mounting part 2
3: Paint supply port 24: Air supply port 25: Nozzle 2
7: Output shaft (for coating robot) 28: Axis line (for output shaft 27 of coating robot and extension A)

Claims (1)

[Scope of utility model registration request] 1. A coating machine which is mounted on an output shaft of a coating robot and is used for coating the inner surface of a box-shaped object to be coated,
A nozzle is provided at the tip of the extension having at least one paint supply passage and at least one air passage formed therein, and the nozzle is oriented forward in the axial direction of the extension, and the side surface of the extension is substantially perpendicular to the axis. Inner coating machine, which is equipped with a nozzle that faces the right side.