JPS5837476Y2 - spray gun - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spray gun that is equipped with a handle attached to the side of a paint container, is convenient to handle, and can simultaneously spray air and paint or stop the spray gun.

In recent years, various building wall paints such as lysine paint, skin paint, stucco, tile/crater pattern spray paint (hereinafter referred to as spray tile) have been developed and are in widespread use.

Some of these wall paints have a relatively high specific gravity, and since a large amount of painted surfaces can be painted at once, a spray gun with a large paint container capacity and excellent operability is required.

Further, when spray tiles are used as paint, in order to maintain the craters or irregularities uniformly over the entire wall surface, it is necessary to maintain the amount of air sprayed constant from the beginning of the spraying.

The purpose of this invention is to provide a spray gun that has excellent operability and can suitably spray architectural paints such as spray tiles by installing a handle on the side of the paint container and simultaneously opening and closing the air and paint channels. shall be.

Furthermore, the present invention can provide a spray gun that can achieve uniform painting work and further improve operability by locking the push piece at the upper end of the handle in the lower position.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a spray gun with a paint container of the present invention will be described below with reference to the drawings.

1 and 2, the spray gun 1 of the present invention is composed of a paint container 2, a handle 4 installed on the side of the paint container 2, and a gun body 6 attached to the lower end of the paint container 2. A pair of side supports 41a horizontally installed above and below the container 2,
41 b.

A push piece nut 45 having a loose insertion hole 44 into which a push piece 43 is inserted is screwed onto the side support 41a.

The push piece 43 has a cylindrical portion 4 at the bottom as shown in FIGS.
3a, and the circumferential surface of the cylindrical portion 43H has an arrow-cut surface 43b with a portion thereof flattened over almost the entire length;
Cutout grooves 43C are provided above the cutout surface 43b and extend horizontally so as to intersect obliquely, and the loose insertion hole 44 of the push piece nut 45 is provided with a groove that slides into contact with the cutout surface 43b to prevent its rotation. By pressing down the pusher piece 43 and then rotating it, the locking pin 45a, which engages with the notch groove 43C and stops its upward movement, crosses a part of the loose insertion hole 44. Let it be planted.

A push rod 46 is further provided vertically on the push piece 43, and the lower end of the push rod 46 is connected to an air on-off valve 48 via a joint 47, and the air on-off valve 48 is connected to the lower side support 41b. The valve seat 49C of the valve body 49b attached to the central hole 49a of the valve outer box 49 to be attached comes into contact with the nipple a (49d) at the lower end of the central hole 493, and the side hole 4 of the valve body 49C9.
9e, opens and closes the air flow path that communicates the air passage a (a) branched from the valve outer box 49 and the air hose 50, and is operated by the spring a (49f) arranged on the upper surface of the nipple a (49d). Always biased upward.

The gun body 6 has a tip nozzle 61 made of hard metal, a funnel-shaped front cap 62 that fixes the nozzle 61, a paint chamber P communicating with the lower end of the paint container 2 at the front, and an air chamber A for sliding the piston. The gun bodies 63 are spaced apart from each other by a partition wall W at the rear, and a gun body 63 is bored therein, and the tip nozzle 61 has a front end part 6 made of gold dust that fits into the front end of a hollow needle valve 64 on the inner surface of the tip nozzle 61.
4a are brought into close contact with each other so that they can move forward and backward, and the needle valve 64 is inserted through the partition wall W while being sealed, and the needle valve 64 is inserted into the air chamber A.
A piston 65, which is in sliding contact with the peripheral wall of the air chamber A through an O-ring 65a, is fixed to the rear end using a cap nut 65b.

A rear cap 66 is attached to the air chamber A, and a spring b 67 supported by the rear cap 66 urges the piston 65 forward, and a lock nut 6 is attached to the cap 66.
6 Adjustment screw 6 that can be tightened by moving back and forth by a
6b sets the rear end position of the piston 65.

Note that the needle valve 64 has a relatively small diameter side hole 64 b that opens in front of the piston 65 , and the side hole 64 b opens in front of the piston 65 .
When it comes into contact with the inner end of the tip nozzle 61, it communicates with the piston front part A1 of the piston sliding air chamber A.

As shown in FIG. 2, the air hose 50 has a flow regulator 68 that includes a nipple b (50a) at the bottom of the gun body, a guide hole b (b), and a taper plug 68b that contacts the valve seat 68a. A guide hole c that opens at the front part A1 of the piston
(c).

However, in the spray gun 1 of the present invention, when the paint is put into the paint container 2 and the paint chamber P is filled, and the handle 4 is grasped and the pusher piece 43 at the upper end is pushed down, the cutout surface 43b of the cylindrical part engages with the locking pin 45. It slides into contact with a and descends without rotating to press rod 4.
6 to open the air on-off valve 48, and nipple a (49
d) compressed air introduced into the valve 48.d). Guide hole a(a)
, air hose SO, -tuple b (50a), guide hole b (b
), flow rate regulator 68. The piston 65 is guided to the front part A1 of the piston of the air chamber A through the guide hole c (c), and the piston 65 is connected to the spring b (67
) The needle valve 64 fixes the piston 65 by moving while expanding the piston front portion A1 until the needle valve (65b) 65b abuts the adjusting screw 66b. The front end 64a is separated from the tip nozzle 61 to open the paint outlet (as shown in FIG. It is ejected into the paint chamber P from the air hole 64C inside the tip nozzle 61.

As a result, the paint in the paint chamber P is sucked by the air current and mixed with air before being ejected, and at the same time, the tip nozzle 61 sprays and diffuses the paint from its nozzle hole 61a by the nozzle action.

Note that when the pusher piece 43 is released, the pusher piece 43 returns due to the biasing force of the spring a (49f), with the cutout portion 43b slidingly contacting the locking pin 45a, and closes the air on/off valve 48, thus closing the needle valve 64. At the same time the piston 65 returns to its original position, the needle valve 64 blocks the paint outlet.

Note that after pressing down the pusher piece 43, the pusher piece 43 is pushed down until the locking pin 45a is inserted into the notch groove 43C as shown in FIG.
By rotating the push piece 43, it is held in the depressed state, so even if you release your finger from the push piece 43, the gas can continue to be emitted.
3C and the locking pin 45a, the push piece 43 automatically returns upward.

As mentioned above, in the present invention, the handle is installed on the side of the paint container 2,
In addition, the air on-off valve can be opened and closed by a push piece provided on the handle, making it easy to hold and operate the container.At the same time, when compressed air is blown from the needle valve, the piston is actuated to move the needle valve and open the paint outlet. Since the fume from the needle valve is carried out in the paint chamber inside the tip nozzle, the paint is mixed with air before being ejected and then diffused by the tip nozzle.Therefore, the paint is atomized and even when using high viscosity paint, it can be easily spun. By adjusting the adjustment screw in advance, a uniform and desired coating surface can be obtained from the beginning without causing any staining.

In addition, when the push piece has a locking means that locks at the lower position as described above, the operator can work while holding the container with all fingers, which makes it easier for the operator to use paint with relatively high specific gravity. It can minimize fatigue and improve work efficiency.

In addition to the means shown in FIGS. 2 to 4 as the locking means for the push piece, various other configurations may be employed, such as a lever piece biased by a spring that is detachably locked to the push rod.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the spray gun of the present invention, Fig. 2a is a partially sectional side view thereof, Fig. 2 is a partially sectional partial view showing the lower surface of the gun body, Fig. 2C 3 is a partial cross-sectional view showing the operating state, FIG. 3 a is an enlarged perspective view showing the push piece, FIG. It is an explanatory view showing engagement of a push piece and a push piece nut. 2: Paint container, 4: Handle, 6: Gun body, 43: Push piece,
43a: Cylindrical portion, 43b: Notched surface, 43C: Notched groove, 4
4: Loose insertion hole, 45a: Locking pin, 46: Push rod, 48: Air on/off valve, 61: Tip nozzle, 64: Needle valve, 64b: Side hole, 65: Piston, A: Air chamber, A1: Piston Front part, P: Paint chamber.

Claims (1)

[Scope of utility model registration request] 1. It comprises a paint container, a handle attached to the side of the paint container, and a gun body attached to the lower end of the paint container, and a push piece is loosely inserted into the upper end of the handle, and the end of the push rod connected to the push piece is opened and closed by the air below the handle. A sliding air chamber for a piston fixed to a hollow needle valve that opens on the inner surface of the tip nozzle and can freely move toward and away from the nozzle is bored in the rear of the gun body, and connected to the valve. A hole is provided to communicate with the front part of the piston of the air chamber, and the front part of the air chamber is connected to the air discharge part of the air on-off valve, and a paint chamber communicating with the lower end of the paint container is provided in the tip nozzle. A spray gun. 2. The spray gun according to claim 1, wherein the push piece is locked in a lower position. 3. The pressing piece has a cylindrical part, and a notched surface is formed on the side surface of the cylindrical part over almost the entire length thereof, and a notched groove connected to the notched surface is horizontally provided above the notched surface, and the pressing piece A locking pin is implanted in a loose insertion hole provided in the handle into which the handle is loosely inserted, so as to partially traverse the loose insertion hole so as to slide into contact with the notched surface and engage with the notched groove when rotated by pressing. 2. The spray gun according to claim 2, wherein the push piece is locked at a lower position.