JPH0938532A - Double-head airless gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the mixing ratio of two liquids and improve operationality by installing an automatic airless gun in the immediate right position of a hand airless gun while making the spraying angle freely adjustable and leading compressed air to an air piston chamber of the automatic airless gun from an air valve chamber of the hand airless gun. SOLUTION: An air valve is moved backward and compressed air is led to an air valve chamber 10 by pulling a trigger 9 of a hand airless gun 2 by the pulling margin of a first stage and after passing communicating paths 14, 14' and an air pipe 5, the compressed air is introduced into an air piston chamber 16 of an automatic airless gun 3. Then, an air piston 17 is moved backward and a hardening agent is sprayed through a spraying outlet 23 of a hardening agent nozzle 21 by pulling a needle valve 20. Next, a needle valve 8 is moved backward and a main agent led to the inside of a paint nozzle 7 is sprayed through a spraying outlet 6 by pulling the trigger 9 by the pulling margin of a second stage and crosses the jet flow of the hardening agent sprayed through the spraying outlet 23 and comes to collision against the jet flow and thus a mixed liquid of the main agent and the hardening agent is applied to an object to be coated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-headed airless gun used for coating a building two-component waterproof material in which a main agent and a curing agent are hydraulically sprayed.

[0002]

2. Description of the Related Art A spray gun using a two-component paint in which a spray flow of a main agent and an auxiliary agent such as a curing agent are mixed and sprayed in front of the spray port of a spray gun has hitherto been known as a double-head spray gun or a conventional spray gun. Known as a two-headed spray gun.
For example, it is shown in JP-B-59-20364 and JP-B-58-35319 proposed by the applicant.
These spray guns are so-called air spray guns that use compressed air for spraying and atomizing the main agent and auxiliary agent, and apply high pressure to the coating material of the main agent and auxiliary agent, and spray it from a nozzle with liquid pressure to paint. There is no double-headed gun in Airless Gun.

In order to obtain a predetermined film thickness after applying a coating material once with an airless gun for spraying the coating material, when applying a building waterproof material that sprays a highly viscous coating material, a single thick coating drips. , Again, the two-step process of spraying the coating material was adopted, but due to the uneconomical effect that it takes time to paint, we developed a two-component waterproofing material for building, and used a known airless gun for spraying the main agent and the curing agent. A method of forming a waterproof film by fixing the Ding by connecting its head with a stay and applying the two liquids by contact mixing in the air is adopted.

[0004]

However, when two airless guns are fixed and used, since there are two triggers, the trigger load and operation are doubled and tired easily, resulting in poor workability. Further, since the mixing ratio of the two liquids at the beginning and the end of the airless gun becomes unstable, it is necessary to throw away the air. Further, since the two airless guns are fixed, it is not possible to easily adjust the positions of the spraying intersections of the two liquids, and it is possible to cope with changes in the spraying distance, which is a poor workability.

Therefore, in the present invention, a hand airless gun for spraying a main agent is combined with an auto airless gun for spraying a curing agent, and both airless guns are operated in stages only by a pulling operation of a trigger of the hand airless gun. The present invention aims to provide a double-headed airless gun that stabilizes the mixing ratio of the two liquids, improves operability, and has good workability.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an automatic airless gun for injecting a hardening agent is attached to a position right next to a hand airless gun for injecting a main agent so that an injection angle can be adjusted, and the air valve chamber of the hand airless gun is provided. An air pipe that extends to the outside from a communication passage for communicating compressed air and communicates with the air piston chamber of the auto airless gun is further connected. Furthermore, the trigger operation of the hand airless gun is made into two stages.
The air piston of the auto airless gun is operated by the triggering operation of the trigger of the second stage to inject the curing agent, and the main agent is ejected from the hand airless gun by the triggering operation of the second stage of the trigger, and contact is made outside. The compressed air supplied to the air piston chamber of the auto airless gun is discharged to the outside via the hollow passage of the air valve behind the air valve facing the air valve chamber of the hand airless gun. A deaeration hole is provided.

[0007]

1 and 2 show the outline of the appearance of a double-headed airless gun 1 according to the present invention, in which an automatic airless gun 3 for injecting a curing agent is located just beside a hand airless gun 2 for injecting a main agent. The injection angle is adjustable by the stay 4, and as will be described later, it extends from the communication passage of the compressed air communicating with the air valve chamber inside the hand airless gun 2 to the piston chamber of the auto airless gun 3. Air pipe 5 that communicates and sends out air for operating the air piston
Are connected to form a double-headed airless gun 1.

FIG. 3 shows a cross section of the hand airless gun 2. The hand airless gun 2 has a paint nozzle 7 with an injection port 6 opening at the tip, a needle valve 8 is inserted into the gun body 2 ', and a trigger 9 is used to move forward and backward to open the outlet 7'of the paint nozzle 7. It is configured to open and close. Further, in conjunction with the operation of the trigger 9, the air valve 11 in the air valve chamber 10 provided in the gun body 2'reverses against the air valve spring 12, and the grip portion 13
The compressed air introduced into the air passage 14 formed in the first passage is transferred from the air valve chamber 10 to the communication passage 1 by the pulling margin of the trigger 9 in the first stage.
It is introduced into the air piston chamber 16 of the auto airless gun 3 by the air pipe 5 formed outside the gun body 2'through 4, 14 ', and the curing agent is sprayed earlier than the auto airless gun 3 as described later. .

In addition, in the operation of the pulling margin of the second stage trigger 9,
The needle valve 8 retracts, and the main agent introduced into the paint nozzle 7 from the paint nipple 15 is jetted to the outside from the jet port 6 at the tip by hydraulic pressure. The injection flow of the curing agent injected from the auto airless gun 3 cross-collides with the injection flow of the main agent in front of the injection axis of the main agent, and the main agent and the curing agent are mixed and applied to the object to be coated.

FIG. 4 shows a cross section of the auto airless gun 3. As described above, the other end of the air pipe 5 extending from the air communication passage 14 'of the hand airless gun 2 is located inside the side surface of the auto airless gun 3. Is introduced into the air piston chamber 16 and the air piston 17 is retracted against the piston spring 18 to pull the needle valve rod 19 having the rear end fixed to the air piston 17 and the needle valve 20 at the tip to harden the hardener. The curing agent, which is separated from the outlet 22 of the nozzle 21 and introduced from the curing agent nipple 24 below the tip of the auto airless gun 3, is ejected to the outside from the ejection port 23 of the curing agent nozzle 21 by hydraulic pressure.

Reference numeral 25 is an air valve chamber 1 of the hand airless gun 2.
0 is a degassing hole formed at the rear end (see FIG. 5) and opens to the outside at the rear end of a hollow passage 11 ′ formed in the air valve 11. Reference numeral 11a is an inlet of the hollow passage, and 11b is an outlet thereof. When the air piston 17 of the auto airless gun 3 is closed while the trigger 9 is returned, the deaeration hole 25 causes the compressed air introduced into the air piston chamber 16 to flow backward through the air pipe 5 and the inside of the hand airless gun 2 The air valve chamber 10 is returned to the outside through the hollow passage 11 ′ of the air valve 11 to be degassed from the rear end to the outside. That is, the deaeration hole 25 is configured to communicate with the air valve chamber 10 through the hollow passage 11 ′ of the air valve 11 with the trigger 9 returned. Reference numerals 26 and 27 are O-rings for preventing leakage.

Further, in the figure, 28 is an air nipple attached to the grip portion of the hand airless gun 2, 29 is an air amount adjusting valve, 30 is a piston rod connected to the air valve 11, and 31 is a needle valve spring.

Next, the operation will be described. By pulling the trigger 9 of the hand airless gun 2 by the pulling amount of the first step (see FIG. 6).
), The air valve 11 retracts in the air valve chamber 10,
The compressed air introduced from the air nipple 28 of the grip portion 13 is introduced into the air valve chamber 10, and further the communication passages 14 and 14 '.
Is introduced into the air piston chamber 16 of the automatic airless gun 3 connected by the air pipe 5 through the air pipe 5, the air piston 17 is retracted, and the needle valve 20 is pulled,
The curing agent introduced from the curing agent nipple 24 is hydraulically ejected from the ejection port 23 of the curing agent nozzle 21 at the tip. In this case, the automatic airless gun 3 adjusts the mounting angle of the automatic airless gun 3 by adjusting the parallel pin 32 provided on the stay 4 so that the injection axis of the automatic airless gun 3 intersects with the injection axis of the hand airless gun 2 at the front. ing.

Next, by pulling the trigger 9 of the hand airless gun 2 by the pulling amount of the second step, the needle valve 8 retracts, and the main agent introduced into the paint nozzle 7 from the paint nipple 15 is jetted at the tip. It is jetted to the outside by hydraulic pressure from the mouth 6, cross-collides with the jet flow of the curing agent jetted from the jet port 23 of the auto airless gun 3, and the mixed liquid of the main agent and the curing agent is applied to the object to be coated. .

Further, the needle valve 8 closes the outlet 7'of the paint nozzle 7 by returning the trigger 9 of the hand airless gun 2 when the coating is interrupted or terminated, and the injection of the main agent is stopped and the air valve 11 is turned on. By closing and stopping the supply of compressed air introduced into the air piston chamber 16 of the auto airless gun 3, the air piston 17 is returned to its original position by the elastic force of the piston spring 18, and the hardening agent nozzle 21 is moved to the needle valve. It is closed at 20, and the injection of the curing agent is stopped.

When the air valve 11 of the hand airless gun 2 is closed, the compressed air supplied to the air piston chamber 16 of the automatic airless gun 3 passes through the air pipe 5 in the opposite direction to the time of supply, and the hand airless gun 3 is pressed. 2 air valve chambers 1
The compressed air that flows back to 0 passes through the hollow passage 11 ′ in the air valve 11 that faces the air valve chamber 10 and is discharged to the atmosphere through the degassing hole 25 that opens at the rear end.

[0017]

As described above, in the double-headed airless gun of the present invention, an automatic airless gun for injecting a curing agent is attached to a position right next to a hand airless gun for injecting a main agent so that the injection angle can be adjusted by a stay, and the air of the handless airless gun can be adjusted. To operate both airless guns only by triggering the hand airless gun by extending the compressed air communicating with the valve chamber to the outside and connecting the air pipe communicating with the air piston chamber of the auto airless gun. The trigger load is reduced and the operability is improved. Also, since the spray angle of the auto airless gun is adjustable to the hand airless gun by the stay, it is easy to adjust the intersection position of the two liquids of the main agent and the hardener that have been sprayed, and it is possible to quickly respond to changes in the spray distance. .

Furthermore, in the present invention, the trigger operation of the hand airless gun is made into two stages, and the air piston of the automatic airless gun is operated by the trigger margin of the trigger of the first stage to inject the curing agent, and the second stage Since the main agent is sprayed from the hand airless gun at the triggering margin and is contacted and mixed externally, the mixing of the two liquids of the main agent and the curing agent is stabilized, and the coating film performance is improved.

Further, according to the present invention, when the trigger is returned, a deaeration hole is provided behind the air valve facing the air valve chamber of the hand airless gun to release the compressed air flowing backward from the automatic airless gun to the outside. The deaeration mechanism is simplified by communicating the deaeration holes through the hollow passage of the valve.

[Brief description of drawings]

FIG. 1 is a front view of a double-headed airless gun of the present invention.

FIG. 2 is a plan view showing a part of the double-headed airless gun of the present invention in section.

FIG. 3 is a vertical sectional view of a hand airless gun of the present invention.

FIG. 4 is a vertical sectional view of an automatic airless gun of the present invention.

FIG. 5 is an enlarged sectional view of a main part of the hand airless gun of the present invention.

FIG. 6 is a cross-sectional view of a main part of the hand airless gun of the present invention in a state where the trigger is pulled to the pulling allowance of the first stage.

FIG. 7 is a cross-sectional view of the essential parts of the hand airless gun of the present invention in a state where the trigger is pulled to the pulling margin of the second stage.

[Explanation of symbols]

 1 ・ ・ ・ Double-headed airless gun 2 ・ ・ ・ Hand airless gun 3 ・ ・ ・ Auto airless gun 4 ・ ・ ・ Stay 5 ・ ・ ・ Air pipe 7 ・ ・ ・ Paint nozzle 8 ・ ・ ・ Needle valve 9 ・ ・ ・ Trigger 10 ... Air valve chamber 11 ... Air valve 11 '... Hollow passage 14, 14' ... Communication passage

Claims (3)

[Claims] 1. An automatic airless gun for injecting a curing agent is attached to a position just beside a hand airless gun for injecting a main agent so that an injection angle can be adjusted, and a compressed air communication passage communicating with an air valve chamber of the hand airless gun is provided. A double-headed airless gun that extends to the outside and connects an air pipe that communicates with the air piston chamber of the auto airless gun. 2. An automatic airless gun for injecting a curing agent is installed directly beside a hand airless gun for injecting a main agent with an adjustable injection angle, and a compressed air communication passage communicating with an air valve chamber of the hand airless gun is provided. An air pipe that extends to the outside and communicates with the air piston chamber of the auto airless gun is connected, and the trigger operation of the hand airless gun is made into two stages, and the auto airless gun is operated by the trigger margin operation of the first stage trigger. Is a double-headed airless gun that operates the air piston to inject the curing agent and then injects the main agent from the hand airless gun by the triggering operation of the second stage trigger, and contacts and mixes with the outside. 3. A deaeration hole is provided in the rear of the air valve facing the air valve chamber of the hand airless gun to release the compressed air supplied to the air piston chamber of the automatic airless gun to the outside through the hollow passage of the air valve. The double-headed airless gun according to claim 2.