JP2001224990A - Portable motor-driven spray gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable motor-driven spray gun capable of saving the time and labor for preparation at the time of coating, easily performing fine works or rapid operation and having small pressure loss of compressed air. SOLUTION: A motor and a compressor driven by the motor are incorporated in a casing having a spray nozzle formed at one end, a discharge port of the compressor is communicated with the spray nozzle to form a discharge passage, a coating material tank is provided in the casing and the feed port of the coating material tank is formed to face the discharge passage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[00001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray gun used for spraying paint on a model or the like.

[0002]

2. Description of the Related Art Generally, a spray gun of this type includes a compressor driven by an electric motor having an accumulator tank,
It consists of a nozzle gun equipped with a paint tank, and a supply hose connecting the pressure accumulation tank and the nozzle gun.The compressed air stored in the pressure accumulation tank is supplied to the nozzle gun via the supply hose, and the paint in the paint tank is compressed with the compressed air. It is designed to be sprayed from a nozzle gun for use.

[0000]

In the above-mentioned general spray gun, prior to painting, the electric motor must first be started to operate the compressor, and the compressed air must be stored in the accumulator tank. There was a problem that it took time. Further, since the pressure accumulation tank and the nozzle gun are connected by the supply hose, there is a problem that when the nozzle gun is operated, the supply hose becomes an obstruction, and it is difficult to perform fine work and quick operation. Further, since the supply hose has a small diameter in consideration of the operability and the like, the pressure drop (pressure loss) of the compressed air due to the flow resistance in the small diameter hose is large, so that a sufficient discharge pressure is required. There is also a problem that it is difficult to obtain, and the rise of pressure at the start of coating is delayed, so that it is difficult to perform agile coating. SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and can provide a portable electric spray gun that can perform fine work and quick operation without any trouble in preparation for painting, and can reduce pressure loss of compressed air. The purpose is to do so.

[0000]

In order to achieve the above object, a portable electric spray gun according to the present invention comprises an electric motor and a compressor driven by the electric motor in a casing having a spray nozzle at one end. The discharge port of the compressor communicates with the spray nozzle to form a discharge path, a paint tank is provided in the casing, and the supply port of the paint tank faces the discharge path. Another feature is that the electric motor is constituted by a motor driven by a commercial power supply.

[0000]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a portable electric spray gun according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a portable electric spray gun, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a longitudinal sectional side view, and reference numeral 1 in the drawing generally shows the portable electric spray gun. This portable electric spray gun 1 has a casing 1 formed in a substantially inverted L-shape.
The spray nozzle 2 is attached to a corner portion of the vehicle 2, and an electric motor 4 and a compressor 5 driven by the electric motor 4 are provided in a vertical grip portion 3. The casing 2 is formed so as to be able to be divided into right and left at a central portion, and a paint tank 6 storing paint is attached to an upper surface portion near the spray nozzle 2.

As shown in FIG. 3, a power cord 7 for supplying a commercial current to the electric motor 4 extends from a lower end on the back side of the vertical grip portion 3. A main switch 8 for turning on / off the commercial current is attached to a lower end on the front side of the vertical grip portion 3. Grip part 3
A lever 9 for turning on / off the compressed air supplied from the compressor 5 to the spray nozzle 2 is provided below the spray nozzle 2 on the front side of the engine.
A switch 19 for supplying electric power to the electric motor 4 in conjunction with the operation of the lever 9 is provided on the grip portion 3 side.
The compressor 5 includes a reciprocating drive type compressor 10,
A converter 11 converts the rotation of the electric motor 4 into reciprocating motion and transmits it to the compressor 10. The input shaft of the converter 11 is connected to the output shaft of the electric motor 4 by a toothed belt 14. The discharge port 15 of the compressor 10 is connected to communicate with the spray nozzle 2, and the discharge port 1 of the compressor 10
A discharge path 16 is formed between the nozzle 5 and the spray nozzle 2. The supply path 17 at the bottom of the paint tank 6 faces the discharge path 16. Reference numeral 18 in the figure is a knob for setting the particle size and the amount of the paint sprayed from the spray nozzle 2.

The procedure for using the portable electric spray gun 1 formed as described above will now be described. First, the paint tank 6 is filled with a desired paint, the plug at the end of the power cord 7 is plugged into an outlet (both not shown), and the switch 8 is turned on.
Turn on. Next, as shown in FIG. 4, the vertical grip portion 3 is gripped, the spray nozzle 2 is directed to the model airplane 19 to be painted, and the lever 9 is operated. Then, the commercial current from the power cord 7 is supplied to the main switch 8 and the switch 2
0 flows to the electric motor 4 to start the electric motor 4. When the electric motor 4 is started, its rotation is converted into a reciprocating motion by the converter 11 and transmitted to the compressor 10, and the compressor 10 is driven to operate the compressor 5.
When the compressor 5 is operated, the compressed air is sent from the discharge port 15 of the compressor 10 to the spray nozzle 2 via the discharge path 16, and the paint in the paint tank 6 is sprayed from the spray nozzle 2 into the mist. It is sprayed on the model airplane 19 and painted.

When painting by operating this lever 9,
Since the discharge path 16 from the discharge port 15 of the compressor 10 to the spray nozzle 2 is short, the flow resistance in the discharge path 16 is extremely small, and since there is no pressure drop, the discharge path 16 is opened by operating the lever 9. The mist-like paint is sprayed immediately from the spray nozzle 2. In the above embodiment, the electric motor 4 for driving the compressor 10 is driven by a commercial power supply. However, a dry battery or a rechargeable battery is mounted on the grip portion 3, and the electric motor 4 is driven by this DC power supply. It is also possible to use a DC motor. In such a case, the power cord 7 can be eliminated, and the convenience is further improved. Further, in the present embodiment, the compressor 5 is constituted by a reciprocating drive type compressor 10 and a converter 11 for transmitting the rotation of the electric motor 4 to the compressor 10 by converting the rotation into reciprocating motion. If the driving compressor 10 is a rotary compressor, the output shaft of the electric motor 4 can be directly connected to the compressor, and the converter 11 can be omitted.

[0000]

As described above, according to the present invention, an electric motor and a compressor driven by the electric motor are provided in a casing having a spray nozzle at one end, and the discharge port of the compressor is connected to the spray nozzle. In addition to forming a discharge path, a paint tank is provided in the casing, and a supply port of the paint tank is formed facing the discharge path.When the electric motor is started to operate the compressor, the compressor is operated by the compressor. The pressurized compressed air is directly supplied to the spray nozzle via the discharge path,
It is not necessary to start the electric motor first and start the compressor as in the past, and to operate the compressor to temporarily store the compressed air in the accumulator tank.This has the advantage that painting can be done immediately without the trouble of preparation. is there.

In addition, the compressed air pressurized by the presser is directly supplied to the spray nozzle via the discharge path formed in the casing, so that the nozzle gun and the pressure storage tank provided separately from the nozzle gun are supplied for a long time. Like the conventional one connected by a hose, the supply hose gets in the way,
There is also an advantage that it is possible to solve the problem that it is difficult to perform fine work and quick operation.

Further, the compressed air pressurized by the presser is directly supplied to the spray nozzle through a discharge path formed in the casing, so that the compressed air due to the flow resistance in the small-diameter hose is different from the conventional one. It is possible to provide a portable electric spray gun that has no pressure drop (pressure loss), has little loss, and has a fast start-up.

[Brief description of the drawings]

FIG. 1 is a perspective view of a portable electric spray gun according to the present invention.

FIG. 2 is an exploded perspective view of the portable electric spray gun according to the present invention.

FIG. 3 is a vertical side view of the portable electric spray gun according to the present invention.

FIG. 4 is a perspective view showing a use state of the portable electric spray gun according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Portable electric spray gun 2 ... Spray nozzle 4 ... Electric motor 5 ... Compressor 6 ... Paint tank 12 ... Casing 15 ... Discharge port 16 ... Discharge path

Claims (2)

[Claims] An electric motor and a compressor driven by the electric motor are provided inside a casing having a spray nozzle formed at one end, and a discharge path is formed by connecting a discharge port of the compressor to the spray nozzle. A portable electric spray gun characterized in that a paint tank is provided in the apparatus, and a supply port of the paint tank faces a discharge path. 2. The portable electric spray gun according to claim 1, wherein the electric motor is a motor driven by a commercial power supply.