JPH0646518Y2 - Multicolor spray gun - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a multicolor used for coating and forming a multicolored pattern of spots or spots on a wall surface with a variety of colors required in building coating and the like. It concerns spray guns.

(Prior art) As a conventional multicolor spray gun for painting,
As described in Japanese Patent Publication No. 170, three sets of spray guns consisting of a paint tank and a spray gun body are integrated so that the spray directions of the left and right spray guns intersect the spray direction of the central spray gun. , With a structure in which the materials are mixed in the air and the coating is completed at once,
As disclosed in Japanese Patent Publication No. 71, the paint from each paint chamber of one paint tank divided into three compartments is supplied to three nozzles, and the nozzles are sprayed in the same plane with their spraying directions at one point. It is well known that a structure is provided so as to be concentrated and ejected.

(Problems to be solved by the invention) Since these known spray guns are configured to use three spray guns corresponding to three kinds of materials or paints of three colors, they are heavy and workability is poor. In addition, the three colors are mixed more than necessary and become a mixed single color, and it is not possible to form a multicolored pattern such as spots or spots in a multicolored pattern. However, there was a problem that it was not finished neatly.

An object of the present invention is to solve the above problems and to provide a multicolor spray gun which is light in weight, has good workability in painting, and can form a beautiful multicolored spotted or spotted multicolored painted surface. To do.

(Means for Solving the Problems) In order to achieve the above object, the present invention comprises a paint tank T and a spray gun body S, and a closing side opening 13 and a paint outlet side opening which are open on the same axis. Port 14 and paint inflow opening
At the center of the cheese-shaped joint portion 16 having 15, through the air pipe 18 equipped with a replaceable air nozzle 17 at the tip of the paint outlet side opening 13 side, the other end of the air pipe 18 , Held liquid-tightly and slidably in the pipe holder 19,
The paint outlet 21 of the joint portion 16 is connected to a paint jetting portion 21 in which a paint nozzle 20 which is rotatable on the same axis as the jetting direction of the air pipe 18 is exchangeably mounted, and an air pipe is supplied from a pressure air source. In a spray gun in which the paint is sprayed from the paint nozzle by spraying the pressurized air supplied to 18 from the air nozzle 17, the partition 6 partitions the paint tank T so as to form a plurality of paint chambers, and A multicolor spray gun characterized in that the rotation of an air motor 35 driven by pressure air from an air source is decelerated by a worm 32 and a worm wheel 28 to rotate the paint nozzle 20 at a low speed. is there.

(Operation) In the case of the multicolor spray gun of the present invention, the multicolor paint having a viscosity of a certain level or more, which is divided into a plurality of single paint tanks and accommodated, is affected by its weight and suction force by the injection of pressurized air. The layer state is supplied to the paint nozzle portion without being mixed with each other, but since the paint nozzle is given a low speed rotation, the paints are not completely mixed with each other at the low speed rotation. It is twisted into a fine spiral while maintaining the color layer of the paint. When the paint in this state is sprayed from the paint nozzle by the pressure air from the air nozzle, each color of the multicolored paint is continuously sprayed through the mixed color that is partially mixed in the middle. Therefore, by applying the wall surface etc. while moving the spray gun, it is possible to form a multi-colored spotted or speckled pattern with a multicolored mixture of the colors of each paint and mixed colors. Since the multicolor paint contained in the single paint tank is ejected from the single paint nozzle, the weight of the multicolor spray gun as a whole is reduced and the workability of painting is improved.

(Embodiment) Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view of the entire configuration of a multicolor spray gun embodying the present invention, and FIG. It is a partially omitted enlarged cross-sectional view taken along the line A, which includes a paint tank T and a spray gun main body S, and the appearance thereof is in the form of a single spray gun. And the compressor C which becomes a source of pressure air
The pressurized air from the air is laid so as to be supplied to the air nozzle 17 and the air motor 35 which will be described later.

The paint tank T has a funnel bottom 3 formed below a trumpet-shaped opening 1 via a tank cylinder 2, and a tank body 5 having an outlet 4 opened at the center of the lowermost portion thereof is shown in FIG. As described above, the replaceable separator 7 that divides the partition 6 into three compartments to form the three paint chambers E, F, and G is installed.

The volume ratio of the three paint chambers E, F, G is changed by replacing the partition wall 6 with another separator 7, and the opening area to the outlet 4 is proportional to the volume ratio. Alternatively, it is set by providing a baffle plate (not shown) at the lower end of the partition wall 6.

Further, a handle 8 for gripping is arranged side by side on the side of the paint tank T.

At the lower end of the handle 8, there is an air nozzle 17 which will be described later.
An on-off valve 11 having an operation valve 9a for opening and closing the compressed air and a control valve 10 for adjusting the amount of the air is attached, and by operating the operation valve 9a, the pressure from the compressor C, which is the pressure air source, is increased. The flow of air to the air pipe 18 is opened and closed.

Although not shown, an opening / closing operation shaft that is pressed down against a spring penetrates the handle 8 for gripping, and the upper end of the opening / closing operation shaft is pressed by the thumb of the hand holding the handle 8. The valve opening / closing operation section 9 to be operated may be provided in a protruding manner. In this case, the operation valve 9a is unnecessary.

As shown in the sectional view of FIG. 3 and the sectional view taken along the line BB of FIG. 3, the spray gun body S has a closing side opening 13, a paint outlet side opening 14, and a paint which open on the same axis. A cheese-shaped joint portion 16 having an inflow-side opening portion 15, and an air pipe 18 which penetrates the center of the joint portion 16 and is equipped with a replaceable air nozzle 17 at the tip end on the paint-outflow-side opening portion 13 side.
The other end of the pipe holding portion 19 holding the closing side opening portion 14 in a liquid-tight and slidable manner and the paint outlet side opening portion 13 of the joint portion 16 in the same injection direction as the air pipe 18. A paint nozzle 20 that is rotatable on an axis is composed of a paint spraying part 21 that is replaceably mounted, and the paint inflow side opening 15 of the joint part 16 is connected by a mounting nut 12 of the paint tank T. It has become.

The pipe holder 19 has a liquid-tight seal material 22 inside one end of a through hole 26 that holds the air pipe 18, and a tightening nut 24 that tightens a chuck 23 at the other end is screwed together. The dynamic guide 25 is held by the end cap 27
The air pipe 18 is connected to the closed side opening 14 of the valve 16, and the other end of the air pipe 18 is connected to the outflow side of the on-off valve 11.

Further, the paint spraying section 21 has a hollow rotary shaft 29 having a worm wheel 28 attached thereto, and a paint nozzle 20 having a diameter larger than that of the air nozzle 17 is replaceably attached to one end opening of the hollow rotary shaft 29, and the other end opening is A rotating portion of the joint portion 16 that communicates with the paint outlet opening 13 and the rotating portion are supported by an oil seal 30 and a bearing 31 so as to be liquid-tight and rotatable, and mesh with the worm wheel 28. Warm 32
The housing 33 for rotatably supporting the
20 is projected and closed with a lid 34 that also serves as a bearing, and the housing is
33 is composed of a drive portion to which a vane type air motor 35 for rotating the worm 32 is attached.

The air motor 35 is housed in a casing 39 fixed to a housing 33 in which a rotor 38 in which a vane 37 appears and disappears is attached to a shaft 40 of a worm 32, and the shaft 40 is rotated by both end portions and an intermediate bearing 41. As shown in FIG. 1, it is configured so as to be freely supported, and is arranged so as to supply the compressed air of the compressor C into the casing 39 via the air amount control valve 36.

Incidentally, V in FIG. 1 is a main valve, and an air pipe.
A scale (not shown) is engraved on the peripheral surface of the other end portion 18 for use when setting the distance between the air nozzle 17 and the paint nozzle 20.

The multi-color spray gun of the present invention having the above-described structure is, for example, a main valve of a compressor C set to about 4 kg / cm ² after containing paint or aggregate in each of the paint chambers E, F and G of a paint tank T. When V is opened and the opening / closing operation section 9 is operated to supply pressurized air to the air motor 35 and the air nozzle 17,
The air motor 35 rotates, and this rotation is decelerated by the worm 32 and the worm wheel 28 to rotate the hollow rotary shaft 29 to which the paint nozzle 20 is attached to about 40 rpm,
The compressed air is jetted from the air nozzle 17 through the paint nozzle 20.

As a result, the paint contained in each of the paint chambers E, F, G and the joint portion 16 is caused by the negative pressure phenomenon generated around the jet flow of the pressure air jetted from the air nozzle 17 through the paint nozzle 20. , Is sprayed onto the surface to be painted from the paint nozzle 20 in a proper mixed state together with the jet of pressured air, and the multicolored spots or spots in which the colors of each paint and the mixed colors are mixed The painting of the beautiful multicolored pattern is completed, but it is formed on the surface to be coated depending on the amount of pressure air, the number of revolutions of the paint nozzle 20, the distance between the paint nozzle 20 and the air nozzle 17, the aperture ratio, etc. Since the density of spots or spots is different, for example, the viscosity of the paint,
Depending on the aggregate, etc., the paint nozzle 20 has a diameter of 8 mm and the air nozzle 17 has a diameter of 3 mm, and then the distance between both nozzles is adjusted to about 35 mm to adjust the air amount to the air nozzle 17 and the air motor 35. It is appropriate to adjust the amount of air to the paint nozzle 20 and set the number of revolutions of the paint nozzle 20 to about 30 to 50 rpm, but the present invention is not limited to this.

Further, the outflow amount of the paint or the like changes depending on the planar positional relationship of the paint chambers E, F, and G with respect to the paint nozzle 20,
If you change the position of the separator 7 or depending on the paint,
In some cases, a separator 7 having a baffle below the partition wall may be used to adjust the flow rate of the paint or the like.

The multicolor spray gun according to the embodiment configured as described above,
Although the separator 7 which partitions the paint tank T into the three paint chambers E, F, and G by the partition wall 6 is used, the paint chamber may be plural.

(Effect of the Invention) According to the multicolor spray gun of the present invention, an air pipe having an air nozzle at its tip and capable of being moved and adjusted in the direction of the central axis has a joint portion penetrating therethrough to form a paint passage. Provided, in the joint portion, the air nozzle and the central axis line,
In addition, the paint nozzle that opens in the air injection direction is attached, the paint supply port of the paint tank is connected to the paint passage from the joint body, and the pressure air from the pressure air source is supplied to the air pipe to supply the air nozzle. In a spray gun in which the paint is sprayed from the paint nozzle, the paint tank is partitioned by partition walls so as to form a plurality of paint chambers, and the paint nozzle is rotated at a low speed so that the multicolored Since the paint is sprayed from a single paint tank while rotating from a single paint tank, the weight of the spray gun is light and the workability is improved, and the diameters of the paint nozzle and air nozzle are large. By adjusting the ratio of the air pipes and advancing / retreating the air nozzles and rotating the paint nozzles at low speeds, it is possible to prevent the multicolored paints from being mixed completely, and to mix the colors of the paints with the mixed colors. A beautiful multicolor pattern polychrome with punctate, can be formed on the coated surface without forming a coating unevenness of spraying.

In addition, a multi-color paint stored in a single paint tank is sprayed from a single paint nozzle, and a worm and a worm wheel that can be downsized with a large reduction ratio are used as low-speed rotation means of the paint nozzle. Since it has been adopted, the overall weight of the multicolor spray gun is reduced and the workability of painting can be significantly improved.

[Brief description of drawings]

FIG. 1 is a schematic view of the entire structure of a multicolor spray gun embodying the present invention. FIG. 2 is an enlarged cross-sectional view of the spray gun body taken along the line AA in FIG. 1, and FIG. FIG. 4 and FIG. 4 are sectional views taken along the line BB in FIG. T ... Paint tank, S ... Spray gun body E, F, G ... Paint chamber C ... Compressor, V ... Main valve 1 ... Trumpet type opening 2 ... Tank cylinder 3 ... Funnel Bottom 4 ... Opening 5 ... Tank main body, 6 ... Partition 7 ... Separator, 8 ... Handle 9 ... Valve open / close operation part, 9a ... Operation valve 10 ... Regulator valve, 11 ... Open / close valve 12 …… Mounting nut, 13 …… Closed side opening 14 …… Paint outflow side opening, 15 …… Paint inflow side opening 16 …… Coupling, 17 …… Air nozzle 18 …… Air pipe, 19 …… Pipe holding part 20 …… Paint nozzle, 21 …… Paint spraying part 22 …… Liquid-tight sealing material, 23 …… Chuck 24 …… Tightening nut, 25 …… Sliding guide 26 …… Through hole, 27 …… End Cap 28 …… Worm wheel, 29 …… Hollow rotating shaft 30 …… Oil seal, 31 …… Bearing 32 …… Worm, 33 …… Housing 34 …… Lid, 35 …… Air motor 36 …… Air quantity control valve, 37 …… Vane 38 …… Rotor, 39 …… Casing 40 …… Shaft, 41 …… Bearing

Claims (2)

[Scope of utility model registration request] 1. A cheese-shaped joint portion 16 comprising a paint tank T and a spray gun body S and having a closing side opening 13, a paint outlet side opening 14 and a paint inlet side opening 15 which are open on the same axis. Through the air pipe 18 having a replaceable air nozzle 17 at the tip on the paint outlet side opening 13 side at the center of the, and the other end of the air pipe 18 is made liquid-tight and slidable. The pipe holding part 19 holds the paint spraying part 21 in which a paint nozzle 20 which is rotatable on the same axis as the spraying direction of the air pipe 18 is exchangeably mounted, is connected to the paint outlet side opening 13 of the joint part 16. Then, in the spray gun in which the paint is sprayed from the paint nozzle by spraying the pressure air supplied from the pressure air source to the air pipe 18 from the air nozzle 17, the partition walls 6 form a plurality of paint chambers. While partitioning the paint tank T, is it a pressure air source? Multicolor spray gun, characterized in that the coating material nozzle 20 is decelerated by the worm 32 and the worm wheel 28 the rotation of the air motor 35 driven by pressure air so as to slow the rotation of the. 2. The multicolor spray gun according to claim 1, wherein the volumes of the plurality of paint chambers can be changed by replacing the partition wall 6.