JP2001219102A - Architectural spray gun - Google Patents

Abstract

[Problem] To use a conventional spray gun for spraying a coating material in a round spray pattern and to branch a coating material nozzle for flat blowing and compressed air without greatly increasing the weight and size. Inexpensive and simple remodeling just by laying pipes, flat spray pattern work can be performed, and coating material particles that have adhered can be removed without damaging the coating material nozzle holes and air flow ejection holes, and the spray particle size suitable for the coating material And a flat spray pattern can be obtained. A flat spray pattern work can be performed by a simple modification using a conventional spray gun for spraying a coating material having a round spray pattern and simply using a spray nozzle for a flat spray paint and a branch pipe for compressed air. The surface of the coating material nozzle was covered with a non-adhesive material. A mechanism for adjusting the air nozzle and the amount of air for pattern formation, respectively, was employed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-held spray gun for spraying a so-called coating material such as ricin, tile, stucco or the like which mainly paints an outer wall surface in architectural painting. The present invention relates to a spray gun for spraying a coating material that deforms a spray pattern of a spray gun that can work efficiently when exterior finishing is performed.

[0002]

2. Description of the Related Art Coating materials (hereinafter referred to as coating materials) such as ricin, tiles, and stucco used for architectural painting are spray guns for spraying coating materials, which are conventionally called ricin guns, tile guns, and stucco guns. Spray coating has been performed using it. In a relatively small painting area such as a single-family house, attach a handle to a container that holds about 2 to 4 liters of coating material, attach a gun body to the bottom of the container, and move it with the container by handwork while painting. Is what you do. FIG. 5 shows a hand-held spray gun for spraying a coating material called a so-called mortar gun, in which an elbow-shaped gun body 52 is attached below a container 51 with an integrated handle 56, and a container-side end of the gun body 52. Is provided with a material valve 53, and the supply and stop of the material are controlled by an operating punch 54 and a lever 55 connected thereto. A base 57 is detachably attached to the gun body 52 on the outlet side thereof with a cap nut 58. And the cock 6 outside the gun body 52
When compressed air is supplied from an air hose (not shown) connected to the air nozzle 0, the compressed air is compressed from the tip opening of the air nozzle 59 located in the base via an air pipe 59a penetrating from the outside of the gun body 52. Air blows out toward the circular base hole 61. When the handle side of the lever 55 is pushed down and the material valve 53 is opened, the coating material contained in the container 51 flows down, and the compressed air and the coating material are mixed in the mouthpiece 57 and the coating material is formed into a circular pattern by the compressed air. Is sprayed and atomized.

[0003] However, heretofore, the spray pattern of this type of building coating material spray gun has a round shape, and a circular coating material nozzle hole is formed at the tip of a gun body disposed below a hand-held container. Is screwed, and the compressed air supplied to the cock at the rear of the gun body is injected from the inner center of the base to the outside from the air nozzle. The coating material flowing down from the hand-held container with the injected air flow is sprayed in a circular pattern shape outside the coating material nozzle hole.

[0004] For this reason, a technique is required to apply a pattern in which the circular patterns overlap, and if the application is not performed properly, unevenness in painting occurs and the original purpose is impaired. Further, since the spray pattern is circular, its spread is limited, and fine coating is required, which is not preferable in terms of workability.

[0005] As a countermeasure, if the shape of the above-mentioned base hole 61 is made to be an oval shape, the spray will be divergent from the oval outlet hole. We have presented a spray gun that sprays a coating material that is suitable for spraying a coating material with a nozzle that can obtain an elliptical pattern with a simple nozzle installation and is less clogged and abrasion-friendly. Since the viscosity and the specific gravity differ depending on the type, the pattern may be uneven, which is difficult to use.

In order to compensate for the above-mentioned drawbacks of the circular pattern formed by the elliptical base, an air cap structure such as a general air spray gun has been designed in a spray gun for spraying a coating material in order to obtain an oval pattern. In such a case, there were the following problems. (1) In order to supply compressed air for deforming the spray pattern from the rear part of the gun body to the air jet holes around the coating material nozzle, it is necessary to form a complicated air flow path in the gun body. This is disadvantageous in terms of cost and greatly increases the weight. (2)
People with sufficient painting skills can work in the round spray pattern, so using the conventional round spray coating material nozzle is lighter and has better workability. For this reason, it has been necessary to easily enable a flat spray coating material nozzle using a conventional coating material spraying spray gun when used by a person with inexperienced coating skills.
(3) In the spraying coating material nozzle, since the coating material sprayed and atomized from the coating material nozzle hole is deformed by an air flow, the coating material which adheres easily to the surface of the coating material nozzle for flat blowing and has a strong adhesive force is dried. If this is done, it must be dropped with a metal object such as a knife or a file, and in some cases, there has been a problem that the coating material nozzle hole or the air flow ejection hole may be damaged. (4) Even if the viscosity or specific gravity changes depending on the type of the coating material, by adjusting the air nozzle and the amount of air for pattern formation, a spray particle diameter and a flat spray pattern suitable for the coating material can be obtained. It was also required.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems. (1) Using a conventional spray gun for spraying a coating material in a round-blowing pattern, it is inexpensive enough to branch the coating material nozzle for flat blowing and compressed air without significantly increasing the weight and size. With simple modification, it enables flat blow pattern work. (2) Even if the coating material particles adhere to and dry on the surface of the coating material nozzle for flat blowing, the applied coating material particles can be removed without damaging the coating material nozzle holes and the air flow ejection holes. (3) Even if the viscosity or specific gravity changes depending on the type of the coating material, the spray nozzle diameter and the flat spray pattern suitable for the coating material can be obtained by adjusting the air nozzle and the amount of air for pattern formation.

[0008]

In order to solve the above-mentioned problems, the present invention provides an air nozzle in a coating material nozzle, and flows down from a hand-held container for storing the coating material into a gun body to form the coating material. The coating material sent from the rear part of the nozzle is mixed and atomized by compressed air ejected from the air nozzle, and sprayed from the coating material nozzle to perform spraying, and the spray pattern from the coating material nozzle is sprayed. The coating material nozzle is provided with a plurality of air flow ejection holes for emitting an air flow intersecting on the front central axis of the coating material nozzle to deform the shape at symmetrical positions sandwiching the nozzle hole of the coating material nozzle. The coating material is detachably disposed on the gun body, and the compressed air supplied from a valve disposed on an air supply path to the air nozzle is branched from the air supply path, and the coating material is passed through an air amount control valve. Screwed to nozzle It was introduced into an air tube connected to the fitting, and supplied to the air injection holes from the air connecting passage bored in the interior of the coating material nozzle. Further, the compressed air supplied from the valve is further branched via the air amount control valve, and is connected to a joint threaded to the coating material nozzle which communicates with each of the air flow ejection holes of the coating material nozzle. It was configured to be introduced into the connected air tube and supplied to the air jet hole. Further, the air flow ejection hole is bored in an attachment detachably disposed on the outer periphery of a round spray coating material nozzle detachably disposed at the tip of the gun body, and the compressed air is screwed into the attachment. It was configured to supply air from the joint to the air jet hole. Then, the surface of the coating material nozzle or the attachment was covered with a non-adhesive material.

[0009]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an assembly form of a spray gun for spraying a coating material to which a flat spray coating material nozzle is attached.
FIG. 2 is a view showing the outer shape of a flat spray coating material nozzle portion, and FIG.
It is a front view and (B) side view. Fig. 3 shows two tubes.
It is a figure which shows the flat spray coating material nozzle part at the time of making it into a system. In FIG. 4, (A) is a diagram in which a flat-blow coating material nozzle is attached to a flat-blow coating material nozzle. FIG. . Fig. 5 shows one system of tube piping (A)
FIG. 3 is a piping diagram in the case of two systems (B). In the respective drawings, the same components will be described with the same reference numerals. The figure is an example of the embodiment and includes elements for design change such as a mechanism and a shape without departing from the scope of the claims.

Referring to FIGS. 1 and 2 and the piping diagram of FIG. 5A, a container 1 can store 2 to 4 liters of a coating material, and a handle 6 is integrally attached to a rear portion. An elbow-shaped gun main body 2 is attached below the container 1, and a material valve 3 is located at an end of the gun main body 2 on the container 1 side.
The supply and stop of the material are controlled by the operating punch 4 and the lever 5 connected thereto. A coating material nozzle 7 for flat blowing is screwed together with a lock nut 11 into a screw portion 2 a on the outlet side of the gun body 2. When compressed air is supplied to the air supply path 13 from an air hose (not shown) connected to a cock 14 outside the gun body 2, the gun body 2
Compressed air is blown out toward the circular nozzle hole 8 from the tip opening of the air nozzle 9 located at the coating material nozzle 7 through an air pipe 9a penetrating from the outside of the nozzle. And
When the handle side of the lever 5 is pushed down and the material valve 3 is opened, the coating material contained in the container 1 flows down, and the compressed air and the coating material are mixed in the coating material nozzle 7 and the coating material is formed into a circular pattern by the compressed air. Is sprayed and atomized.

A part of the compressed air supplied to the air supply passage 13 is branched and introduced into the air tube 16 via the air amount control valve 21. Since the air tube 16 is connected to a one-touch detachable joint 17 screwed around the outer periphery of the coating material nozzle 7, the compressed air is supplied to the coating material nozzle 7.
The air is supplied to the air jet holes 10 from an air communication channel 18 formed in the inside. The air flow ejection holes 10 are arranged at symmetrical positions with the nozzle holes 8 interposed therebetween so as to eject an intersecting air flow on the front central axis of the coating material nozzle 7. When the coating material particles sprayed and atomized in a shape are sandwiched by an air flow, they are deformed into a flat pattern.

As a result, the amount of air blown out of the air nozzle 9 is adjusted by the air amount adjusting valve 21 provided on the way of the compressed air supplied from the cock 14 flowing from the air supply passage 13 to the air pipe 9a. To adjust the particle size of the coating material appropriately. Furthermore, when the air flow control valve 15 is adjusted, the air flow rate from the air flow ejection hole 10 is adjusted. By sandwiching the coating material particles to be sprayed and atomized in an air flow, the coating material particles can be deformed into a flat pattern that can be easily applied.

As the lysine paint, it is necessary to use one having a different diameter of the coating material nozzle 7 depending on the size of the aggregate to be mixed, and it is necessary to prepare two or three kinds. Since the coating material nozzle 7 is screwed together with the lock nut 11 into the screw portion 2a on the outlet side of the gun body 2, the flat pattern can be easily changed in the horizontal or vertical direction according to the coating location. Further, since the air tube 16 is connected to a one-touch detachable fitting 17 screwed around the outer periphery of the coating material nozzle 7, by removing the air tube 16 from the fitting 17, the different types of coating material nozzles 7 can be easily obtained. The coating material nozzle 7 can be easily changed when the particle size of the coating material is changed or when the coating material is changed. further,
When a skilled worker uses the coating material nozzle of the round blowing pattern, the coating material nozzle of the round blowing pattern is screwed into the screw portion 2 a on the outlet side of the gun body 2, and the air amount adjusting valve 21 is used.
When the is closed, work can be performed with the coating material nozzle having the round spray pattern.

FIG. 3 is a view in which a coating material nozzle 7A having a structure different from that of FIGS. 2 and 1 is attached, and will be described with reference to FIG. Branched in the air supply path 13 and the air amount control valve 21
After that, the light is further branched into two systems by a branch joint 19. Each of the air tubes 19a is connected to a one-touch detachable joint 20 which individually communicates with the air flow ejection hole 10. In the coating material nozzle 7A, a plurality of air flow ejection holes 10 are provided.
Since compressed air is supplied from each air tube 19a to the inside, the air communication flow path 18 is internally provided like the coating material nozzle 7.
There is no need to drill holes, and there is an advantage that it can be manufactured at low cost.

In FIG. 4, a conventionally used round spray coating material nozzle 7 which is detachably disposed at the tip of the gun body 2 is used.
This is an embodiment in which an attachment 7B is detachably mounted on C. The attachment 7 </ b> B is provided with an air flow outlet 10, and compressed air is introduced from the joint 20 and connected to the air flow outlet 10. As a result, the attachment 7B is attached to the generally used round spray coating material nozzle 7C.
By simply adding, it is possible to easily spray the coating material by flat blowing.

As described above, in a flat-blowing coating material nozzle or a flat-blowing attachment, a coating material sprayed and atomized from a coating material nozzle hole is deformed by an air flow. However, these surfaces were covered with a non-adhesive material, so even if the coating material particles adhered and dried on the surface, they would damage the coating material nozzle holes and air flow jet holes. Adhered coating material particles can be removed without any problem. The surface of the coating material nozzle can be made non-adhesive by baking and applying a non-adhesive paint such as a fluororesin powder resin or a fluororesin paint, but other detackification methods can be used. .

[0017]

According to the present invention, the spray gun for spraying a coating material having a conventional round spray pattern can be applied to a spray nozzle for flat spraying without significantly increasing the weight and size by using the conventional spray gun for spraying a coating material. At the same time as replacing or attaching attachments, flat blow pattern work can be performed with an inexpensive and simple modification that only requires branch piping for compressed air. (2) Even if the coating material particles adhere to and adhere to the surface of the coating material nozzle attachment for flat blowing, the applied coating material particles can be removed without damaging the coating material nozzle holes and the air flow ejection holes. (3) Even if the viscosity or specific gravity changes depending on the type of coating material, by adjusting the air nozzle and the amount of air for pattern formation, respectively,
A spray particle diameter and a flat spray pattern suitable for the coating material can be obtained.

[0018]

[Brief description of the drawings]

FIG. 1 is a view showing an assembly form of a spray gun for spraying a coating material to which a flat spray coating material nozzle is attached.

FIG. 2 is a diagram showing an outer shape of a flat spray coating material nozzle portion;
(A) is a front view and (B) is a side view.

FIG. 3 is a diagram showing a flat spray coating material nozzle portion in a case where the tube piping is divided into two systems.

FIG. 4 is a view showing an assembling mode in which a flat-blowing attachment having an air flow ejection hole is attached to a round spray coating material nozzle;
(A) Assembly drawing. (B) is a diagram of a flat-blow attachment alone, and (C) is a diagram in which a round-blow coating material nozzle is attached to a gun body.

FIG. 5 is a piping diagram in the case where the tube piping is divided into one system (A) and two systems (B).

FIG. 6 is a view showing an assembling mode of a spray gun for spraying a coating material, which is a so-called hand-held mortar gun.

[Description of Signs] 1 Container 2 Gun body 2a Tip screw 3 Valve 5 Lever 6 Handle 7,7A Coating material nozzle 7B Attachment 7C Round spray coating material nozzle 8 Nozzle hole 9 Air nozzle 11 Positioning nut 10 Air jet hole 12 Coating material 13 Air supply path 16 Air tube 14 Valve 17 One-touch detachable joint 19a Air tube 21 Air flow control valve

Claims (5)

[Claims] An air nozzle (9) in a coating material nozzle (7).
And a hand-held container (1) for storing the coating material (12)
The coating material, which flows down into the gun body (2) from below and is sent from the rear of the coating material nozzle (7), is mixed and atomized by compressed air ejected from the air nozzle (9), and the coating material nozzle (7) In a coating material spraying spray gun which sprays and sprays from the nozzle, an air flow intersecting on the front central axis of the coating material nozzle (7) is jetted to deform the spray pattern shape from the coating material nozzle (7). A plurality of air flow ejection holes (10) are formed at symmetrical positions sandwiching the nozzle hole (8) of the coating material nozzle (7). The coating material nozzle (7) is detachably attached to the gun body (2). The compressed air supplied from the valve (14) disposed in the air supply path (13) to the air nozzle (9) is branched from the air supply path (13), and the air amount control valve ( 21) a joint (17) screwed to the coating material nozzle via The coating material is introduced into an air tube (16) connected thereto, and supplied from the air communication flow path (18) drilled inside the coating material nozzle (7) to the air flow ejection hole (10). Material spray gun. 2. The compressed air supplied from the valve (14) is further branched via the air amount control valve (21), and the compressed air is discharged from the air flow outlet (1) of the coating material nozzle (7A).
0) is introduced into an air tube (19a) connected to a joint (20) screwed to the coating material nozzle (7A) communicating with each of the coating material nozzles (7A), and is supplied to the air flow ejection holes (10). The spray gun for spraying a coating material according to claim 1. 3. An attachment (7B) removably disposed on the outer periphery of a round spray coating material nozzle (7C) removably disposed at the tip of the gun body (2). ), And the compressed air is blown through the air flow outlet (1).
0) The spray gun for spraying a coating material according to claim 1 or 2, characterized in that the spray is supplied to the air jet hole (10) from a joint screwed in the attachment (7B). 4. The coating material nozzle according to claim 1, wherein a surface of said coating material nozzle is covered with a non-adhesive material.
Spray gun for spraying coating materials. 5. The spray gun according to claim 3, wherein a surface of said attachment (7B) is covered with a non-adhesive material.