JP2000167444A - Adaptor for circularly spraying gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly and uniformly apply a base coating material by providing a jetting hole for compressed air in an adaptor for a spray gun to deform spray pattern by jetting the compressed air stream to come into collision with an atomized coating material from the spray gun and fitting freely attachably and detachably to the tip of the spray gun. SOLUTION: The adaptor 17 for spray gun is concentrically and circularly provided around the outer periphery of the coating material nozzle 2 and freely detachably fixed with a screw 22 for fixing. A corner 18 having an air hole 19 for jetting the compressed air supplied to a joint 21 from an air source.solenoid valve facing to hold the nearly circular pattern therebetween is formed in the adaptor 17. The compressed air from the air hole 19 is jetted to come into collision with the atomized coating material to deform the nearly circular pattern of the atomized coating material into elliptic shape. As a result, the switching of the flat spray pattern and the circular spray pattern to each other or the change and adjustment of spray pattern is simply performed and the base coating material is smoothly and uniformly applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the spraying of a high-viscosity material, in particular, a wall spray in the field of architectural painting to finish the exterior of a high-viscosity material. The present invention relates to a detachable adapter for deformation.

[0002]

2. Description of the Related Art In the field of architectural painting, guns for spraying relatively high-viscosity materials such as building coating materials have been increasing in recent years as compared with hand-held spray guns for spraying directly on walls and the like under construction at building sites. There is an automatic spray gun that automatically paints wall boards and the like produced in factories on the factory line. This automatic spray gun is attached to an automatic coating machine, and continuously sprays a high-viscosity material while moving the automatic spray gun left and right on a wall or the like sent by a conveyor or the like. The supply of the high-viscosity material to the automatic spray gun is pumped by a pump, and the stop of the supply of the high-viscosity material and the stop of the supply of the blowing air are controlled by an automatic control device.

As a technique of this kind, the applicant of the present invention has disclosed Japanese Patent Publication No.
No. 2-343016 and Japanese Utility Model Publication No. 53-37468 file an application for an improved technique for a spray gun for plastering materials.
The automatic spray gun shown in Fig. 7 is often used as an automatic spray gun having the atomized structure for painting ricin tiles. At the center of the gun body 50, an air nozzle pipe 53 having an air nozzle 54 screwed at the tip is provided with a piston mechanism 5 operated by working air from an air joint 51.
2, so that it can be moved back and forth. When the air nozzle 54 is opened from the paint nozzle 55 sandwiched by the cap nut 56 at the tip of the gun body 50, the paint sent from a pump (not shown) flows from the paint joint 57 and the center hole 55a of the paint nozzle 55. Erupts from At the same time, since the blowing air is supplied from the air joint 58, the paint ejected from the center hole 55a of the paint nozzle 55 is dispersed and sprayed in a substantially circular pattern. The spray pattern on the painted object is adjusted mainly by the pressure and amount of the air blown from the air nozzle 54, and a uniform painted surface is sprayed on the painted object at a high pressure, and a spotted pattern is applied at a relatively low pressure. Can be

[0004] In recent years, in the field of construction, the coating film pattern has been diversified, and even in automatic coating on a factory line, the coating film pattern on a wall board tends to be various. For this reason, the coating conditions also need to be varied in accordance with the type of the high-viscosity material and the pattern of the coating film to be formed. In addition, the wall board also requires multiple coating steps of base coating, intermediate coating, and finish coating, and the coating conditions need to be changed each time.
Several types, such as 6mm and 4mm, are prepared and exchanged depending on the paint or coating process.

[0005] The use of the round blow pattern and the flat blow pattern for the type of coating film pattern on the wall board is determined as follows depending on the characteristics of the high-viscosity material and the pattern of the finished surface. In the base coating, it is necessary to apply the base paint mainly composed of fine aggregate (sand etc.) smoothly and uniformly,
A flat blowing pattern is suitable. For this reason, in some cases, other spray guns dedicated to undercoating may be used, but to replace the spray gun itself, it is necessary to stop the paint supply system and reset the setting, so it is not enough to replace only the gun There was a problem. On the other hand, in intermediate coating and finish coating, there are many irregular pattern coatings and multi-colored pattern coatings of two or three colors, and because the paint viscosity is high and the particle size of aggregates (sand, gravel, etc.) is large, the flat blowing pattern Since the dispersion and the pattern finish cannot be performed well, a round blowing pattern is used.

In automatic coating, a wall board is placed on a conveyor and conveyed, and an automatic spray gun attached to an automatic coating machine is moved left and right with respect to the wall board to perform flat coating. At this time, the problems of (1) repainting and (2) overspray occur. A flat blow pattern is suitable for this problem. First, a case where a round blowing pattern is used in FIG. 3 for overlapping patterns will be described. If the automatic spray gun is moved to the left and right in response to the movement of the wall board 59 and the plane is painted, a difference in shading of the paint tends to occur depending on the degree of overlapping of the patterns.
As a result, a stripe pattern occurs on the coating film surface. In the round-blowing pattern, the film thickness distribution at the end portion of the pattern is sharply reduced, and when the overlapping of the patterns is large as shown in FIG. ,
Conversely, as shown in FIG. 5 (B), if the pattern is slightly overlapped with each other, the film thickness tends to be partially reduced, and pattern adjustment tends to be difficult. On the other hand, the case where the flat blow pattern is used in FIG. 6 will be described. The film thickness distribution in the pattern gradually becomes thinner at the pattern end, so that even if the overlapping of the patterns is slightly shifted. ,
Since the film thickness does not change significantly, the overcoating of the pattern tends to be easily adjusted.

Next, the case where the round spray pattern is used for the overspray will be described with reference to FIG. 3. If the automatic spray gun is moved left and right with respect to the movement of the wall board 59, the flat spray is performed. It is necessary to apply the paint greatly beyond the left and right end portions 60 and 61 of the above, and useless spraying (overspray) occurs almost in the vicinity of the size of the round spray pattern. On the other hand, when the flat blowing pattern is used, as shown in FIG. 4, the rate of painting the flat blowing pattern beyond the left and right ends 60 and 61 of the wall board 59 is reduced, and unnecessary spraying is also reduced. The flat blowing pattern is also suitable for the problem.

As described above, the round-blowing pattern and the flat-blowing pattern are selectively used depending on the type of the paint and the coating process. At the same time, the flat-blowing pattern is suitable from the viewpoint of the efficiency of automatic coating. There is a need for an automatic coating spray gun that can easily switch between a pattern and a flat blow pattern. However, in this spray gun for ricin tile painting, an air nozzle pipe that also serves as a paint valve is located at the center to disperse and spray high-viscosity coating material from behind the paint nozzle with the force of compressed air. ing. Therefore, unlike a general spray gun for flat blowing, configuring a compressed air flow path capable of flat blowing has a problem that the apparatus must be complicated and large. Further, if the square air discharge portion is formed by projecting the nozzle to eject auxiliary air for forming a flat blow pattern, paint particles ejected from the nozzle outlet at the time of the round blow pattern adhere to the square air discharge portion, and the corner air discharge portion is formed. There is also a problem that the air hole of the air discharge unit is closed.

In the automatic coating, there is a demand to switch not only a simple flat plate but also various types of building members from a conventional manual coating to an automatic coating, so that a vertical flat blowing pattern or a horizontal flat blowing pattern is required. It was also required that the spray pattern could be changed freely.

[0010]

SUMMARY OF THE INVENTION In an automatic spray gun for lysine tile painting configured for a round spray pattern, a base paint mainly composed of fine aggregate (sand, etc.) such as a base coat is smoothed. It is an object of the present invention to provide a configuration that can be easily switched to a flat-blow pattern in order to uniformly apply a small amount of overspray. It is another object of the present invention to provide a configuration capable of switching patterns that can correspond to various types of building members.

[0011]

According to the present invention, there is provided an internal mixing type spray gun which supplies a coating material to a coating material nozzle, sprays first compressed air from an air nozzle port provided at the rear center thereof, and performs mixing and spraying. Second for spray paint from paint nozzle
A jet hole of compressed air for deforming the spray pattern by jetting and colliding the compressed air flow is provided, and a spray gun adapter detachably attached to the tip of the paint nozzle is used. The spray gun adapter is attached to the tip of the paint nozzle so as to be movable back and forth and fixed. Further, a plurality of compressed air ejection holes for deforming the spray pattern were provided in the adapter for the spray gun, and the compressed air was controllably connected to each ejection port.

[0012]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view in which an adapter is attached to a round spray automatic spray gun for lysine tile painting, FIG. 1 (A) is a front view of the adapter, and FIG. 1 (B) is AO in FIG. 1 (A). It is sectional explanatory drawing in the state which attached the adapter to the round spray automatic spray gun in the -B sectional drawing. A paint nozzle 2 is screwed at the tip of the gun body 1.
A circular nozzle hole 3 is clear in the center of the paint nozzle 2. An air nozzle pipe 4 is provided at the center of the gun body 1, an air nozzle 5 is screwed at a tip of the air nozzle pipe 4, and an intermediate joint 7 is provided at a rear end of the air nozzle pipe 4.
-The piston 8 is screwed. An O-ring 7 a is annularly mounted on the intermediate joint 7, and is slidable hermetically with respect to the inner periphery of the connection joint 10. A paint packing 13 for preventing paint leakage from the paint chamber 12 is disposed at an intermediate portion of the air nozzle pipe 4, and an air packing 1 for preventing air leakage from the piston chamber front 6a.
The air nozzle pipe 4 is movable forward and backward while preventing paint leakage and air leakage.

When the spray is stopped, the resilience of the spring 16 behind the piston chamber 6b is received via the piston 8 and the air nozzle pipe 4, and the air nozzle 5 is in contact with the paint nozzle 2. When compressed air is supplied from the air joint 15 as piston working air to start spraying, the piston 8 in which the piston seal 9 is mounted moves toward the rear end side of the gun body 1 against the spring 16. Then, the air nozzle 5 in contact with the paint nozzle 2 is separated from the paint nozzle 2. As a result, when paint from a pump (not shown) is supplied from the paint joint 23, the paint is discharged from the nozzle hole 3 through the paint chamber 12. At this time, joint 1
1 is supplied with blowing air, and the connection joint 10
It is ejected from the air nozzle 5 through the intermediate joint 7 and the air nozzle pipe 4. The compressed air disperses and sprays the paint discharged from the paint paint nozzle 2, and sprays the paint on the paint in a substantially circular pattern.

An adapter 17 according to the present invention is mounted concentrically around the outer periphery of the paint nozzle 2 and is provided with a fixing screw 2.
2 for easy attachment and detachment. The adapter 17 is formed with corners 18 having air holes 19 facing each other so as to sandwich a substantially circular pattern.
The pattern air is supplied to the joint 21 from an air source / solenoid valve (not shown), and is ejected from the air hole 19 through the air passage 20 to deform the substantially circular pattern of the paint into an elliptical shape. The drive and stop of the pump, the supply and stop of the supply of the piston working air, the supply and stop of the blowing air, and the supply and the stop of the pattern air are controlled by a control device (not shown).

As a result, when the base paint mainly composed of fine aggregate (sand etc.) is to be applied smoothly and uniformly by the base coat, the adapter 17 is attached to the outer periphery of the paint paint nozzle 2 and the flat spray pattern is applied. Paint with. In addition, intermediate coating
In the case of uneven pattern painting or multi-color pattern painting of two or three colors in the finish painting, since the paint viscosity is high and the particle size of aggregate (sand, gravel etc.) is large, dispersion and pattern If the adapter 17 is not attached to the outer periphery of the paint nozzle 2, the sprayed paint will adhere to the air holes 19 of the adapter 17. The adapter 17 must be removed and painted in a round spray pattern. Can be.

The adapter 17 fixes the paint nozzle 2 at the fixed position.
Because it can be slid back and forth along the circumference of
The position of the air hole for flat blowing can be adjusted back and forth, and it is also possible to give more changes to the spray pattern by changing the position of collision with the dispersed and sprayed coating material, and furthermore, the blowing air pressure More changes are possible by combining changes. Although the adapter 17 is attached to the outer periphery of the paint nozzle 2 in FIG.
When the paint nozzle 55 is sandwiched between the cap nuts 56 as in 7, the adapter 17 may be attached to the cap nut 56 so as to be movable back and forth. Further, as shown in FIG. 2, a plurality of corners 18a, 18b, 18c, and 18d are formed in the adapter 17, and the compressed air is connected to each of the corners in a controllable manner. It is also possible to deflect in a blowing pattern, a vertical flat blowing pattern, or in an oblique direction, so that spraying corresponding to the shape of the coated object or spraying having a characteristic spray pattern can be performed.

[0017]

Since the present invention is configured as described above, it has the following effects. Switching between flat-blowing and round-blowing patterns and changing / adjusting the spraying pattern depending on the type of coating, such as undercoating, intermediate coating, and topcoating, can be widely applied only by using the adapter 17. This eliminates the problem of preparing various types of spray guns for flat-blowing and round-blowing, and also preventing paint from adhering by using both a flat-blowing air cap and a round-blowing air cap.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view in which an adapter is attached to a round spray automatic spray gun for lysine tile painting, (A) is a front view of the adapter, and (B) is a state in which the adapter is attached to the round spray automatic spray gun. It is sectional drawing.

FIG. 2 is a front view of an adapter having a plurality of corners formed in another form of the adapter.

FIG. 3 is a view for explaining a state in which a round spray pattern moves to form a coating film on a coating object.

FIG. 4 is a view for explaining a state in which a flat blowing pattern moves to form a coating film on a coating object.

FIG. 5 is a view for explaining a state of forming a coating film of a round spray pattern. (A) is a cross-sectional view of the coating film when the overlapping of the patterns is large, and (B) is a cross-sectional view of the coating film when the overlapping of the patterns is small.

FIG. 6 is a view for explaining a state of forming a coating film of a flat blown pattern, and is a cross-sectional view of the coating film when the overlapping of the patterns is appropriate.

FIG. 7 is a sectional structural view of a round spray automatic spray gun without an adapter.

Claims (3)

[Claims] 1. An internal mixing spray gun for supplying paint to a paint nozzle and spraying and mixing and spraying first compressed air from an air nozzle port provided at the rear center thereof. 2. An adapter for a round spray gun which is provided with a compressed air jetting hole for jetting and colliding a compressed air flow to deform a spray pattern, and which is detachably attached to a tip portion of the paint nozzle. 2. The spray gun adapter according to claim 1, wherein the adapter is attached to the tip of the paint nozzle so as to be movable back and forth and fixed. 3. The spray gun adapter according to claim 1, wherein a plurality of compressed air ejection holes for deforming the spray pattern are provided, and the compressed air is controllably connected to each ejection port.