JPH11342352A - Multihead spray gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable operation with light force without changing the holding hands and to improve durability and maintenance characteristic by supplying the compressed air from air valves disposed at the handles mounted at tank bodies to air nozzles, supplying the air to air pistons and opening and closing respective material valves by the actuation of these air pistons. SOLUTION: The inflow and stop of coating materials to air nozzle chambers 5 from the coating material tanks are executed by the actuation of the pistons which occurs when the compressed air is supplied to the air supply ports of piston bodies 12 or the supply thereto is stopped. The respective coating materials in the air nozzle chambers 5 are sprayed outside from ejection nozzles 3 by the compressed air flow of the air nozzles 4. The handles 15a on one side of the right and left handles of the tank bodies are provided with air valves 16 and valve pressers 26a which may be operated by fingers to turn on and off the supply of the compressed air from compressed air connecting ports 17. The actuation of the material valves 7 and the supply of blowing air are executed by the pistons 12 and the air nozzles 4. As a result, the coating work may be carried out with the fingertip operation of the one hand. The durability and maintenance characteristic may be improved by the simplification of the valve structure and component constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-held multi-head spray gun for spraying building materials, which sprays and paints a plurality of paints with respective spray nozzles and air nozzles to form a multicolored coating film. In particular, the present invention relates to open / close control of a material valve.

[0002]

2. Description of the Related Art A plurality of paints are stored in a multi-vessel container, and are sprayed and sprayed by respective spray nozzles and air nozzles to form a multicolored coating film. Guns are in proportion to the demand for stone patterns and characteristic patterns in the fields of building exteriors and interiors,
The degree of use is also increasing. However, when working with a plurality of paints stored in each paint tank, about 10 kg
This is an operation that requires attention to the painting of the pattern and the scaffolding as well as the weight of the object, and requires extremely physical strength and skill. For this reason, various improvements have been made to improve workability.

Conventionally, as shown in FIG. 5 and FIG. 6, the container is transported by holding the left and right handles 50 of the tank body. However, in order to spray the paint, the lever 52 is moved with a finger while holding the grip 51 at the center. It is necessary to press and spray. When the lever is pressed, the material valve 53 is pulled up by the link mechanism 52a, and the paint in each paint tank is released by the weight of the air nozzle unit 54 by its own weight.
Run down. At the same time, an air valve 55 built into the grip below the lever 52 compresses the return spring 55b while pushing the push rod 5
The compressed air which is pushed open by 5a and supplied to the air joint 58 is branched and supplied to each air nozzle 56 arranged at the lower part of each paint tank. When the finger is released from the lever 52, the air valve 55 and the material valve 53 return, and the supply of the compressed air and the paint stops. The paint flowing down to the air nozzle portion 54 is sprayed from the ejection nozzle 57 by the compressed air from the air nozzle 56 to form a multicolor pattern on the painting surface. At this time, the worker needs to move one hand from the handle 50 to the grip 51 at the center, and the balance supporting the tank body is deteriorated. Therefore, bands or strings are attached to the left and right sides of the tank body to form a ring. The work is done while maintaining a balance by hanging a loop of a string on the neck or shoulder of the worker.

[0004] For this reason, every time the tank body is transported and moved and the spraying operation is performed, the worker moves one hand from the hand to the grip in the center, which has a problem of poor workability. Also,
Since both the air valve 55 and the material valve 53 are operated by a finger, the air valve 55 and the material valve 53 do not operate with a light force, and have a problem that they are easily fatigued.

In order to solve such a problem, Japanese Utility Model Laid-Open Publication No. Sho 59-176666 discloses an air valve provided at a handle so that compressed air can be turned on and off while holding the handle. However, in this method, when a paint having a low viscosity is used without a material valve, there is a problem that the paint drips from the ejection nozzle due to its own weight when the spraying is stopped.

To solve this problem, Japanese Patent Application Laid-Open
In the disclosure of No. -12362, a material valve having an air nozzle formed at the tip is disposed at a jet nozzle portion for jetting each paint, and the material valve is opened by a piston operated by compressed air. Even when the material valve is in contact with the ejection nozzle and a low-viscosity paint is used, the problem that the paint drips from the ejection nozzle due to its own weight when the spraying is stopped and the problem that the valve operation is heavy is solved.

However, in the case of this system, since each material valve is operated by the piston, each of them must always be operated simultaneously. Further, there is a problem that the valve pipe slides in the paint passage, so that a failure easily occurs in the packing part, and a complicated structure makes maintenance difficult. In particular, when using this multi-head spray gun, a building material spray material containing aggregates such as sand is often selected. Had problems.
Cleaning after work is difficult due to the complicated structure,
There is also a problem that care must be taken so that cleaning water does not enter the piston.

[0008]

A plurality of paints stored in a partitioned tank are sprayed and sprayed by respective spray nozzles and air nozzles to spray a hand-held type building material for forming a multicolored coating film. In the multi-head spray gun, the material valve can be opened and closed without changing hands and with a light force. In addition, a simple configuration and structure are adopted so that durability and maintainability are improved.

[0009]

In order to solve the above-mentioned problems, a multi-head spray gun according to the first aspect of the present invention comprises a tank body divided into a plurality of paint tanks, and a plurality of paint tanks provided below each paint tank. In a multi-head spray gun provided with an ejection nozzle for ejecting each paint, an air nozzle for spraying each paint to the outside from the ejection nozzle by compressed air, and a material valve for stopping supply of the paint in each paint tank to the air nozzle portion, A multi-head, wherein compressed air from an air valve provided on a handle attached to the main body is supplied to the air nozzle and to an air piston, and each of the material valves is opened and closed by the operation of the air piston. It is a spray gun. A multi-head spray gun according to a second aspect of the present invention includes a tank main body divided into a plurality of paint tanks, an ejection nozzle provided at a lower portion of each paint tank and ejecting each paint, and each paint being ejected from the ejection nozzle by compressed air. In a multi-head spray gun provided with an air nozzle for spraying to the outside and a material valve for stopping the supply of paint in each paint tank to the air nozzle portion, compressed air from an air valve provided on a handle attached to the tank body is used as the air. The multi-head spray gun is characterized in that it is supplied to a nozzle and to an air piston, and the piston shaft of the air piston and the respective material valves are connected by a link mechanism to open and close.

[0010]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1, FIG. 2, and FIG. 3 are configuration diagrams of a multi-head spray gun according to an embodiment of the present invention. FIG. 4 is a detailed sectional view of the air nozzle chamber.

The tank body 1 is divided into 1a, 1b, 1
c, and a jet nozzle 3 (3a, 3b, 3c) and an air nozzle 4 (4a, 4b)
4c) are provided. A material valve 7 (7) provided at a nozzle chamber entrance 6 (6a, 6b, 6c) that enters the air nozzle chamber 5 (5a, 5b, 5c) from each paint tank.
By the operations of a, 7b, and 7c), each paint is supplied and supply is stopped. The material valve 7 has a material valve rod 8 (8a, 8b,
8c) are integrated, each is connected to the lever 9, and furthermore, the central portion of the lever 9 is supported by the fulcrum 10C, and the lever 9 is connected to the piston shaft 11 of the piston 12 which moves up and down. .

An air supply port 13 is provided in the piston body 12, and the compressed air is supplied to the piston 12 when compressed air is supplied.
a operates to compress the return shaft 14 while the piston shaft 1
1 is pulled down. A fulcrum 10a is attached to the piston shaft 11.
When the lever 9 connected to the fulcrum is pulled, the fulcrum 10b opposite to the fulcrum 10C rises upward. As a result, the fulcrum 10
The material valve rod 8 and the material valve 7 connected at b also rise, and a gap is formed between the material valve 7 and the nozzle chamber inlet 6, so that the paint is supplied from the paint tanks 1a, 1b, and 1c to the air nozzle chamber 5.
(5A, 5B, 5C).

When the supply of the compressed air to the piston 12 is stopped, the piston shaft 11 is pushed upward by the force of the compressed return spring 14, so that the material valve rod 8 and the material valve 7 are pushed.
Is pushed downward, and the gap between the material valve 7 and the nozzle chamber entrance 6 is closed, so that the flow of the paint from each of the paint tanks 1a, 1b, 1c into the air nozzle chamber 5 is stopped.

Each paint flowing into the air nozzle chamber 5 is
Jet nozzle 3 by compressed air flow from air nozzle 4
Sprayed from outside. Handles 1 provided on left and right sides of tank body 1
An air valve 16 and a valve pusher 16a are provided on one handle 15a on one side of the device 5 so that it can be operated by a finger, so that compressed air from the compressed air connection port 17 can be turned on and off.
When the valve push 16a is pressed while holding the handle 15a, the compressed air flows to the secondary side of the air valve 16 and is supplied from the branch joint 18 to the piston 12 and the air nozzle 4 by the air tube.

Air joint 19 for introducing compressed air
In the middle of the air nozzle 4, an air amount adjusting valve 20 is provided.
Is provided, and the adjustment of the amount of air from the air nozzle 4 can be individually adjusted. Further, a cover 21 is attached to a lower portion of the tank body 1 so that the cover 21 is easily stabilized when the work is stopped or completed when the tank is placed on the floor.

With the above configuration, the operator can operate the material valve 7 and supply the blowing air simply by lightly pressing the valve pusher 16a with one hand while holding the handle with both hands.

[0017]

Since the present invention is configured as described above, it has the following effects.

While holding the handles provided on the left and right sides of the tank main body with both hands, simply press the air valve lightly with one finger to spray multiple paints simultaneously with compressed air. Even in a work environment with poor scaffolding such as a construction site, work can be performed in a well-balanced manner. In addition, the structure and parts configuration of the material valve for stopping the supply of paint have been simplified, and the elimination of sliding parts has improved the durability and maintainability, which were problems with conventional products. . In addition, since the structure and parts configuration of the material valve portion for stopping the supply of the paint have been simplified, cost and weight have been reduced.

[0019]

[Brief description of the drawings]

FIG. 1 is a front structural view of a multi-head spray gun according to the present invention.

FIG. 2 is a side view of the configuration of a multi-head spray gun according to the present invention.

FIG. 3 is a plan view showing the configuration of a multi-head spray gun according to the present invention.

FIG. 4 is a detailed sectional view of an air nozzle portion in the multi-head spray gun of the present invention.

FIG. 5 is a front view of a conventional multi-head spray gun.

FIG. 6 is a side view of a conventional multi-head spray gun.

[Explanation of symbols]

 Reference Signs List 1 tank main body 2 partition plate 3 (3a, 3b, 3c) air nozzle 4 (4a, 4b, 4c) ejection nozzle 7 (7a, 7b, 7c) material valve 10 link mechanism 10a, 10b, 10c fulcrum 12 piston 15 (15a・ 15b) Handle 16 Air valve

Claims (2)

[Claims] 1. A tank body divided into a plurality of paint tanks, an ejection nozzle provided at a lower portion of each paint tank for ejecting each paint, and an air nozzle for spraying each paint from the ejection nozzle to the outside by compressed air. In a multi-head spray gun provided with a material valve for stopping supply of paint in each paint tank to the air nozzle portion, compressed air from an air valve provided on a handle attached to the tank body is supplied to the air nozzle while air is supplied. A multi-head spray gun, wherein the material valve is supplied to a piston, and the material valve is opened and closed by operation of the air piston. 2. A tank main body divided into a plurality of paint tanks, an ejection nozzle provided at a lower portion of each paint tank for ejecting each paint, and an air nozzle for spraying each paint from the ejection nozzle to the outside by compressed air. In a multi-head spray gun provided with a material valve for stopping supply of paint in each paint tank to the air nozzle portion, compressed air from an air valve provided on a handle attached to the tank body is supplied to the air nozzle while air is supplied. Supplying to the piston, the piston shaft of the air piston and the respective material valves are connected by a link mechanism,
A multi-head spray gun that opens and closes.