JPH09206635A - Pattern regulation mechanism of manifold type automatic gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To finely regulate patterns while confirming a coating state at close range by improving pattern regulating function by the remote control of a manifold type automatic gun. SOLUTION: A manifold type automatic gun is constituted so that a manually regulable pattern regulating valve 18 is attached to the pattern regulating passage 17 of an automatic gun main body communicating with the remote control pattern regulating passage 16c bored in a manifold 16 and a pattern shape is finely regulated near a spray place at a time of the setting of a coating condition or at the time of the change of patterns at a time of coating work.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention relates to improvement of a pattern adjusting mechanism of a manifold type automatic gun which is mounted on an automatic painting machine such as a painting robot to perform spray painting.

[0002]

2. Description of the Related Art In a manifold type automatic gun, the paint joint and air joint connection ports are installed separately from the automatic gun in a manifold. The installation of the paint joint and the installation of the air joint are not in a fixed direction. Therefore, the connecting hose can be put together at the rear of the automatic gun by a special part such as an L-shaped mounting joint. However, since the automatic gun is easily stained by paint adhesion due to scattering of spray particles, it must be removed from the automatic coating machine during work or at the end of the work and always washed. At the time of this cleaning, the joint connected to the automatic gun is removed and cleaned each time. In addition, since the hoses are assembled to the rear by the L-shaped joint or the like, the automatic gun has a complicated shape, which makes it difficult to clean.

In order to improve the above-mentioned problems, the manifold mounted on the main body of the automatic gun has the shape of the automatic gun made as simple as possible, and a paint flow passage for supplying to the automatic gun, an air passage for remote control, and a spray The air passages are bored in the manifold, the connection ports are lined up on one surface of the rear of the manifold and are collectively arranged, and a one-touch joint or the like is attached so that the hoses can be easily attached. When cleaning the automatic gun, the automatic gun alone can be easily attached and detached with a single bolt while the manifold is mounted on the automatic coating machine.The external shape of the manifold itself is also a simple shape that is easy to clean. Things.

Since the manifold type automatic gun is mainly controlled by remote control, the control of the spray amount of the paint and the control of the spray pattern opening are mainly controlled by the control box provided in the automatic coating machine. Is not controlled. Particularly, the control of the pattern opening is performed by controlling the air pressure to the air hole on the side surface of the air cap through the pattern adjustment flow path in the control box. However, in this spray pattern opening control, it is very difficult to make fine adjustments to the spray pattern opening with the automatic gun during the coating test to set the coating conditions or when the spray pattern changes during the painting work. It's inconvenient.

[0005]

In the manifold type automatic gun, in the control box for centrally controlling the automatic coating machine, and for the pattern adjustment in which the air pressure is controlled by the regulator, coating is performed while observing the coating state at the spray tip of the automatic coating machine. In this case, since it is difficult to finely adjust the pattern opening, it is an object to add a manual adjustment function to the manifold type automatic gun itself to facilitate the handling.

[0006]

According to the present invention, an air hose of a remote control air automatic spray gun, a connection port of a paint hose, and a manifold provided with its flow path separately are attached to the automatic spray gun. In the optimized manifold type automatic gun, paint supply flow path communicating with the manifold connection port, air flow path for needle valve operation, spray air flow path,
When the manifold has a pattern control flow path for remote control, the pattern control valve communicates with the pattern control flow path formed in the automatic gun body, allowing remote control and manual pattern control to be used together. It is a pattern adjustment mechanism of the enabled manifold type automatic gun,
The pattern adjusting mechanism enabling the combined use closes the pattern adjusting flow path formed in the automatic gun itself in front of the pattern adjusting valve attached to the flow path, and the pattern adjusting flow path immediately after the closing is connected to the manifold. This is a pattern adjusting mechanism for a manifold type automatic gun, which is capable of performing manual pattern adjustment by communicating with a remote control pattern adjusting flow path that is bored in the.

[0007]

In the manifold type automatic gun, the basic mechanism of the automatic gun is almost the same as that of the general automatic gun. The air piston is operated by the air for remote control, and the needle valve linked to this is pulled to inject the paint. Stop. An air valve that opens and closes the blown air is attached to the air piston. When the air valve is opened, it is branched into two flow passages, a central air flow passage that communicates with the air cap central hole portion and a side air flow passage that communicates with a side surface hole of the air cap corner portion. Usually, a pattern control valve is attached in the side air flow passage of the automatic gun body, that is, in the middle of the pattern control flow passage, and the pattern is adjusted by this. However, in the manifold type automatic gun, since the pattern adjustment is basically performed by remote control, the pattern adjustment valve attached to the automatic gun body is usually removed or closed with a blind screw. In addition, the pattern adjustment flow path after the air valve of the air piston is not drilled or closed with a blind screw so that the pattern control dedicated flow path drilled in the manifold is directly connected to the pattern control flow path of the automatic gun body. Pattern adjustment.

In the above structure, when the manifold type automatic gun is mounted on an automatic painting machine such as a painting robot to perform painting, particularly when the painting operation is taught by the painting robot and the shape of the article to be coated is complicated. Requires fine adjustment of the spray pattern opening and pattern shape while observing the spray state near the object to be coated. At that time, since the control box of the centralized control may be separated from the tip of the automatic gun, the work is complicated and extremely troublesome when the operator makes adjustments. As a result, a pattern control valve is attached to the pattern control flow path of the automatic gun body to enable pattern control while observing the spray state near the object to be coated. Adjust the side air pressure to the appropriate pressure to determine the opening of the flat spray pattern and make fine adjustments with the pattern control valve attached to the automatic gun during a coating test, etc., to obtain a more appropriate coating finish. It was done like this.

[0009]

An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing the overall structure of a manifold type automatic gun. In FIG. 1, 1 is an automatic gun body, 3
A paint nozzle screwed to the main body of the automatic gun and an air cap 2 surrounding the paint nozzle 3 and joined by taper are attached to the main body by an air cap cover 4. The air cap 2 is formed with a central air hole 2b which is a main component for atomizing the paint by an air jet from a ring-shaped slit formed on the outer periphery of the tip of the paint nozzle 3. Then, the side air holes 2a from the corners of the air cap 2 form a flat pattern by a fan-shaped spray. The side air hole 2a is an independent flow path in which the air passages of the central air hole 2b and the side air hole 2a are blocked by the taper joint between the paint nozzle 3 and the air cap 2. Therefore, depending on the strength of the air jet from the side air holes 2a, the pattern opening of the spray pattern that spreads in a fan shape that forms a flat pattern is changed. The needle valve 5 is slidably in contact with the nozzle opening of the paint nozzle 3, and the reciprocating motion of the needle valve 5 opens and closes to stop spraying the paint.

At the rear of the automatic gun body 1, an air piston 6 for opening and closing the needle valve 5 by remote control.
Is airtightly slidably fitted into a cylinder 1a formed in the main body 1. The air piston 6 has a central through hole for operating the needle valve 5, and
At the left end of the air piston, the air valve 6a is pressed against the air valve seat 7 fitted to the main body 1 by the air piston spring 9. Therefore, the air piston 6
Serves both as an operation of the needle valve 5 and as an air valve. The spring receiver 8 is screwed onto the right end of the needle valve 5, is pressed by the needle valve spring 10, and is pressed against the nozzle opening of the paint nozzle 3 by the tip taper of the needle valve. At the right end of the automatic gun body 1, the paint spray amount control device 1
1 is set on the spring retainer 12 and screwed to the main body 1. The paint adjusting knob 13 of the paint jetting amount adjusting device 11 set on the spring retainer 12 moves left and right by turning the knob, and the right end of the needle valve 5 is adjusted by the adjusting rod 13a.
The needle valve 5 is brought into contact with the needle valve 5 to limit the pulling amount, and the paint ejection amount is adjusted by the opening degree of the needle valve 5 slidingly seating on the nozzle opening of the paint nozzle 3.

The operation of the air piston 6 is performed by the manifold 1
6 is operated by the air piston operating air passage 14 and the air introduced from the blowing air passage 15.
When air for operating the air piston is introduced from the flow path 14 under the control of the control box, the air piston 6
Moves rearward against the air piston spring 9, and the air valve 6
a is opened from the air valve seat 7, and the air from the blowing air flow path 15 is sent to the tip portion of the automatic gun. After the air valve 6a is opened, the air piston 6 is brought into contact with the needle valve spring receiver 8 fixed to the needle valve 5 arranged at a distance of several mm, the needle valve 5 is pulled, and the paint is ejected. . That is, there is a two-stage blowing mechanism in which the paint is ejected after the air is ejected and when the paint is closed, the air valve is closed after the ejection of the paint is stopped.

The air blown from the air valve 6a is used for a general automatic gun which is usually used by itself.
A central air flow passage (not shown) and two flow passages of a pattern adjustment flow passage 17 are opened, and a pattern adjustment valve 18 is attached to the main body 1 in the pattern adjustment flow passage 17. Has been. And in the manifold type automatic gun,
As described in the conventional example, normally, the pattern adjusting flow path is not drilled, or the flow path is closed by a blind screw 19 as shown in the figure, and the mounting position of the pattern adjusting valve 18 is not processed or processed. However, the pattern control valve location was a blind screw.

In the manifold type automatic gun of the present invention, the pattern adjusting flow passage 17 from the air valve 6a is closed by a blind screw, and a pattern adjusting valve 18 is newly provided in the pattern adjusting flow passage 17 immediately after that. . Pattern control valve 18
Screw the valve retainer 18a to the center of the automatic gun body 1,
By adjusting the opening degree of the pattern control flow passage 17 communicating with the remote control pattern control flow passage 16c of the manifold 16 by the valve rod 18d formed integrally with the valve retainer 18a, the side air holes 2a. The amount of air flowing into the air is adjusted, and the pattern opening is adjusted by the jet strength of the side air. The opening degree of the pattern adjusting flow path 17 is adjusted by rotating the pattern adjusting knob 18b to move the valve rod 18d up and down to change the flow path area of the pattern adjusting flow path 17, and when the pattern opening is adjusted to an appropriate pattern. , And is fixed by the jam nut 18c.

The manifold 16 attached to the automatic gun body 1 is fixed to the automatic gun body 1 with a single hexagon socket head cap screw 21. The manifold 16 has a needle valve operating air flow passage 16a communicating with an air piston operating air introducing port 14 for operating the air piston 6 of the automatic gun body 1 and a blowing air communicating with the blowing air introducing port 15 of the automatic gun body 1. A flow control channel 16b, a remote control pattern control flow channel 16c communicating with the pattern control flow channel 17 of the automatic gun body 1, and a paint supply flow channel 16d communicating with the paint supply port of the automatic gun are provided. Further, the through hole 16e provided in the manifold 16 is a holder hole for mounting on the automatic painting machine, and is fixed to the inserted mounting rod or the like by the set bolt 22. And manifold 1
An O-ring 23 is fitted into a connecting portion between the passage outlet 6 and the inlet passage of the automatic gun body 1 to seal the outside air. Therefore, at the time of maintenance, the automatic gun body 1 can be easily removed from the manifold 16 only by loosening the one hexagon socket head cap screw 21. A joint connecting screw is formed on the rear surface of the manifold 16.

FIG. 2 is a side view from the rear of the manifold type automatic gun of FIG. 1, showing a partial cross section of the pattern control valve portion. In FIG. 2, the valve stem 1 of the pattern control valve 18
In 8d, by rotating a valve rod 18d having a diameter larger than that of the pattern adjustment flow passage 17 of the automatic gun body 1, the valve rod 18d moves up and down to adjust the opening degree of the pattern adjustment flow passage 17. A needle valve actuation air passage 16a for actuating the air piston 6 on the rear surface of the manifold 16, and a blowing air passage 16b,
There are inlets for the remote control pattern adjusting flow path 16c and the paint supply flow path 16d, and each is threaded to attach a connection joint (not shown). The circulation paint flow passage 16f is opened side by side with the paint supply flow passage 16d when the paint with a large amount of precipitation is constantly circulated in order to prevent the paint from settling in the hose or when the paint ejection amount is large. Is provided in order to circulate the paint in order to stabilize the discharge pressure and keep the discharge pressure constant, or to facilitate the cleaning of the paint hose during cleaning. When circulation is unnecessary, it is possible to use the blind paint screw to close the inlet of the circulation paint flow passage 16f.

[0016]

In the manifold type automatic gun, the pattern control flow passage for remote control formed in the manifold is communicated with the pattern control flow passage of the automatic gun body, and the pattern control flow passage of the automatic gun body is adjusted. By providing a valve, when setting the coating conditions of an automatic coating machine or during coating work, it is possible to easily perform fine pattern adjustments while checking the coating state while looking up close, improving work efficiency and advanced It has the effect of making it possible to finish painting.

[Brief description of drawings]

FIG. 1 is a sectional view of the entire configuration of a manifold type automatic gun of the present invention.

FIG. 2 is a side view from the right side of FIG.

[Explanation of symbols]

 1 Automatic Gun Main Body 2 Air Cap 3 Paint Nozzle 5 Needle Valve 6 Air Piston 6a Air Valve 11 Paint Spray Amount Control Device 14 Air Piston Operating Air Flow Path 16a Needle Valve Operating Air Flow Path 15, 16b Spraying Air Flow Path 16 Manifold 16c Pattern control flow path for remote control 17 Pattern control flow path 18 Pattern control valve 18b Pattern control knob 18d Valve rod 19 Blind screw 21 Hexagon socket head cap screw 23 O-ring

Claims (2)

[Claims] 1. A manifold type automatic gun in which an air hose of a remote control air automatic spray gun, a connection port for a paint hose, and a manifold provided with a flow path thereof are separately attached to the automatic spray gun. When the manifold has a paint supply flow path communicating with the manifold connection port, a needle valve actuation air flow path, a spray air flow path, and a pattern adjustment air flow path, the pattern control valve is formed on the automatic gun body. A pattern adjustment mechanism for a manifold-type automatic gun that allows pattern adjustment by remote control and manual pattern adjustment to be used in combination with the pattern adjustment flow path. 2. When the pattern adjusting mechanism is capable of using the pattern adjustment by remote control and the pattern adjustment manually, the pattern adjusting flow path formed in the automatic gun body is provided with the pattern adjusting flow path. The manifold according to claim 1, wherein the manifold is closed before the control valve, and the pattern control flow path immediately after closing is connected to the pattern control flow path for remote control formed in the manifold to allow manual pattern adjustment. Automatic gun pattern adjustment mechanism.