JP5618925B2 - Paint spray gun filter and paint spray gun using the same - Google Patents

Description

The present invention relates to a filter for a paint spray gun used for painting an object to be painted such as a car body of an automobile, and a paint spray gun using the same , and more specifically, a paint spray for improving the finish of painting of the object to be painted. The present invention relates to a gun filter and a paint spray gun using the same .

  As a conventional paint spray gun, for example, a paint spray gun as described in Patent Document 1 is known. This paint spray gun includes a gun body to which paint is supplied, a paint nozzle having a jet outlet for jetting the paint, and a needle valve for controlling the flow rate of the paint jetted from the jet outlet, and is not painted In some cases, the needle nozzle closes the nozzle outlet of the paint nozzle, and at the time of painting, the needle valve is moved to open the nozzle nozzle outlet, and the paint is ejected from the nozzle outlet.

JP 2002-361122 A

  However, the paint spray gun as described above sprays paint particles and dust adhering to the paint flow path in the gun body as they are from the paint nozzle when painting the work. There was a problem that the finish of the coating of the film was lowered. Furthermore, the above-described paint spray gun ejects fine paint particles and dust from the paint nozzle as they are if the paint contains fine paint particles and dust. There has been a problem in that the finish of the painted object is lowered.

In view of the above problems, an object of the present invention is to provide a paint spray gun filter that improves the finish of painting of an object to be coated and a paint spray gun using the same.

  The object of the present invention is achieved by the following means. In addition, although the code | symbol in a parenthesis attaches the referential mark of embodiment mentioned later, this invention is not limited to this.

The filter for a paint spray gun according to the invention of claim 1 comprises a paint spray gun body (1), a paint nozzle (12) for spraying paint provided on the tip side of the paint spray gun body (1), A paint spray gun filter for use in a paint spray gun having a paint supply section (9) provided in the paint spray gun body (1) for supplying paint into the paint spray gun body (1). A first filter (20) provided in the paint nozzle (12) for capturing dust and / or a second filter (30) provided in the paint supply unit (9) for capturing dust,
The first filter (20) and / or the second filter (30) are formed in a roll shape,
The first filter (20) includes a mesh-like first filter body (20a) having a plurality of through holes, and the paint nozzle (12 formed on the front or back surface of the first filter body (20a). And a plurality of first protrusions (20c) for reducing the situation where the passage of the paint in the first filter main body (20a) is obstructed by dust trapped in the mesh,
The second filter (30) includes a mesh-like second filter main body (30a) having a plurality of through holes, and the paint supply unit (30) formed on the front surface or the back surface of the second filter main body (30a). 9) A plurality of second protrusions (30c) that reduce a situation in which the passage of the paint in the inside is obstructed by dust trapped in the mesh of the second filter body (30). Yes.

The paint spray gun filter according to the invention of claim 2 is the paint spray gun filter according to claim 1 , wherein a first reinforcing member (20b) is provided on a peripheral frame of the first filter body (20a). It is characterized by being formed.

A paint spray gun filter according to a third aspect of the present invention is the paint spray gun filter according to the first or second aspect , wherein a second reinforcing member (30b) is provided on a peripheral frame of the second filter body (30a). ) Is formed.

A paint spray gun according to a fourth aspect of the invention is characterized by using the paint spray gun filter according to any one of the first to third aspects .

Next, effects of the present invention will be described with reference numerals in the drawings. According to invention of Claim 1 and 4 , the 1st filter (20) which captures dust in the paint nozzle (12) is provided, and the second filter (30) which captures dust in the paint supply unit 9 is provided. Since it is provided, the situation where dust is ejected from the paint nozzle (12) can be reduced. Therefore, according to this invention, the finish of the coating of a to-be-coated object can be improved.

Furthermore, according to the present invention, the first filter (20) for capturing dust is provided in the paint nozzle (12), and further, the second filter (30) for capturing dust in the paint supply unit (9) is provided. Since it is provided, the situation where dust is ejected from the paint nozzle (12) can be further reduced. Therefore, it is possible to further improve the finish of painting the article to be coated.

According to the present invention, the first filter (20) has a mesh-like first filter body (20a) having a plurality of through holes, so that dust can be trapped in the mesh. it can. Furthermore, even if the dust trapped in the meshes obstructs the passage of the paint from inside the mesh, the first filter main body (20a) does not allow the paint to pass through the front surface portion or the back surface portion. Since the plurality of first protrusions (20c) are formed to reduce the situation of being obstructed by the dust trapped in the mesh of the filter main body (20a), it is possible to form a distribution path for the paint. Therefore, the situation that obstructs the passage of the paint can be reduced. Moreover, according to this invention, since the said 2nd filter (30) also has the structure similar to the said 1st filter (20), there exists the same effect. Further, since the first filter (20) and / or the second filter (30) is formed in a roll shape, the distribution path of the paint in the first filter (20) and / or the second filter (30). Can be set freely.

And according to invention of Claim 2 and 4 , since the 1st reinforcement member (20b) is formed in the surrounding frame of the said 1st filter main body (20a), the said 1st filter main body (20a) of the said 1st filter main body (20a) is formed. It is possible to reduce the situation where the peripheral frame is finely torn or turned over with age. Similarly, according to the third and fourth aspects of the invention, since the second reinforcing member (30b) is formed on the peripheral frame of the second filter body (30a), the second filter body (20a) is formed. ) Can be reduced when the peripheral frame is torn or turned over with age.

It is a figure which shows the external appearance structure of the coating spray gun which concerns on one Embodiment of this invention. It is a disassembled perspective view of the coating spray gun main body front-end | tip part concerning the embodiment. (A) is the expansion | deployment top view of the 1st filter which concerns on the embodiment, (b) is the XX expanded sectional view of (a). It is a disassembled perspective view by the side of the coating material supply part which concerns on the same embodiment. (A) is the expansion | deployment top view of the 2nd filter which concerns on the same embodiment, (b) is the YY line expanded sectional view of (a).

  Hereinafter, an embodiment of a paint spray gun according to the present invention will be specifically described with reference to FIGS.

  As shown in FIG. 1, the paint spray gun according to the present embodiment has a substantially pistol-shaped paint spray gun body 1, and the paint spray gun body 1 includes a gripping part for gripping the paint spray gun body 1. 2 is provided. An air nipple 3 connected to a compressed air supply source is provided below the grip 2, and the amount of air supplied into the coating spray gun body 1 can be adjusted near the air nipple 3. The air amount adjusting device 4 is provided at a position substantially parallel to the air nipple 3.

  Further, a paint spray amount adjusting device 5 capable of adjusting the spray amount of the paint by adjusting the movement of the needle valve 10 (see FIG. 2) in the paint spray gun body 1 is provided above the grip portion 2. Above the coating material ejection amount adjusting device 5, a putter opening adjusting device 6 for adjusting the coating width of the coating material is provided at a position substantially parallel to the coating material ejection amount adjusting device 5.

  Furthermore, a trigger 7 is provided at a substantially central portion of the paint spray gun main body 1 at a position where the trigger 7 is substantially parallel to the grip 2. By pulling the trigger 7, an air valve ( (Not shown) is opened and the paint can be sprayed onto the object.

  An air cap 8 is fastened and fixed to the tip of the paint spray gun body 1. The configuration of the tip of the paint spray gun body 1 will be described in more detail with reference to FIG. A male screw 11a is formed on the outer periphery of the distal end portion 11 of the paint spray gun body 1, and a female screw (not shown) formed inside the air cap 8 is screwed into the male screw 11a. As a result, the air cap 8 is fastened and fixed to the distal end portion 11 of the paint spray gun body 1.

  Further, a female screw 11b is formed on the inner periphery of the distal end portion 11 of the paint spray gun body 1, and a male screw 12b formed on the outer peripheral surface of the cylindrical base end portion 12a of the paint nozzle 12 is formed on the female screw 11b. Are screwed together. As a result, the paint nozzle 12 is fastened and fixed to the tip 11 of the paint spray gun body 1.

  The paint nozzle 12 has a cylindrical base end portion 12a, and a ring-shaped flat surface portion 12c is fixed to the base end portion 12a. Further, the other end portion of the flat surface portion 12c has a substantially hexagonal pyramid shape. The paint nozzle main body 12d is fixed. A spray port 12e through which a mixture of paint and compressed air is sprayed penetrates the distal end portion of the paint nozzle body 12d, and a plurality of air holes 12f penetrate through the base end portion at required locations. Note that the outer diameter of the flat surface portion 12 c is smaller than the inner diameter of the air cap 8.

  On the other hand, the air cap 8 is provided with a pair of protruding portions 8a, and an air hole 8b (one in the drawing) is provided on the inner diameter side of the protruding portion 8a. From the air hole 8b provided in this way, the compressed air in the paint spray gun body 1 ejected from the air hole 12f of the paint nozzle 12 is ejected in the radially inward direction. That is, when the paint nozzle 12 is fastened and fixed to the front end portion 11 of the paint spray gun main body 1 and further, when the air cap 8 is fastened and fixed, an air passage is formed on the back surface side of the flat portion 12c and the air cap 8. This is because the compressed air is sprayed from the air holes 8b through the air passages because they are fastened and fixed in the state. An insertion hole 8c is formed at the center of the air cap 8, and the spray port 12e of the paint nozzle 12 is inserted into the insertion hole 8c (see FIG. 4).

  On the other hand, as shown in FIG. 2, a cylindrical first filter 20 formed in a roll shape for capturing dust is inserted into the cylindrical base end portion 12 a of the paint nozzle 12. The first filter 20 is formed in the first filter 20 so that the needle valve 10 can be inserted when the paint nozzle 12 is fastened and fixed to the distal end portion 11 of the paint spray gun body 1. Thereby, as shown in FIG. 1, the first filter 20 is provided in the paint nozzle 12.

The first filter 20 as described above is formed of a rectangular elastic resin having a thickness of about 0.15 mm, and has a mesh-shaped first filter body 20a as shown in FIG. And the 1st reinforcement member 20b formed with the material same as the said 1st filter main body 20a is formed in the surrounding frame of this mesh-shaped 1st filter main body 20a. By providing such a first reinforcing member 20b, it is possible to reduce a situation in which the peripheral frame of the first filter body 20a is finely torn or turned over with age.

In addition, a plurality of first protrusions 20c are formed on the back surface of the first filter body 20a as shown in FIG. In the present embodiment, the example in which the plurality of first protrusions 20c are formed over the entire back surface of the first filter body 20a has been shown, but the plurality of first protrusions 20c are not formed over the entire area. Good. A plurality of first protrusions 20c may be formed on the surface portion.

  By the way, in order to make the first filter 20 formed in this way into the shape as shown in FIG. 2, the first filter 20 is wound in the direction of the arrow P shown in FIG. It will be formed in the roll shape as shown in FIG. In addition, what is necessary is just to fix end surfaces with an adhesive agent etc. in order to maintain this roll shape.

Since the first filter 20 formed in this way has a mesh-like first filter body 20a, dust can be trapped in the mesh. Furthermore, even if the dust trapped in the mesh prevents the paint from passing through the mesh, a plurality of first protrusions 20c are formed on the front surface or the back surface of the first filter body 20a. Therefore, the distribution channel of the paint can be formed. Therefore, the situation that obstructs the passage of the paint can be reduced.

  Moreover, since the 1st filter 20 is formed in roll shape, the distribution channel of the coating material in the 1st filter 20 can be set freely.

  On the other hand, as shown in FIG. 1, the paint spray gun body 1 is provided with a paint supply section 9 for supplying paint into the paint spray gun body 1 in a direction perpendicular to the axial direction of the air cap 8. ing. The paint supply unit 9 is connected to a hose 15 having a fastening portion 15a. A paint tank (not shown) storing paint is provided at the tip of the hose.

  The connecting method between the paint supply unit 9 and the hose 15 will be described in more detail with reference to FIG. Is formed with a male screw 9b. And the internal thread 15b is formed in the internal peripheral surface of the fastening part 15a of the hose 15 which has the fastening part 15a, The male screw 9b is screwed together by this female thread 15b. Thereby, the coating material supply part 9 and the hose 15 will be connected.

  As shown in FIG. 4, when the paint supply unit 9 and the hose 15 are connected, a cylindrical second filter 30 formed in a roll shape for capturing dust is inserted into the paint supply unit 9. The The paint supply unit 9 and the hose 15 are connected in a state where the second filter 30 is inserted into the paint supply unit 9. Thereby, as shown in FIG. 1, the second filter 30 is provided in the paint supply unit 9.

The second filter 30 as described above is formed of an elastic resin having a thickness of about 0.15 mm, and has a rectangular and mesh-like second filter body 30a as shown in FIG. And the 2nd reinforcement member 30b formed with the material same as the said 2nd filter main body 30a is formed in the surrounding frame of this mesh-shaped 2nd filter main body 30a.

Further, as shown in FIG. 5B, a plurality of second protrusions 30c are formed over the entire back surface of the second filter body 30a. In the present embodiment, the example in which the plurality of second protrusions 30c are formed over the entire back surface of the second filter body 30a has been described. However, the plurality of second protrusions 30c are not formed over the entire area. Good. A plurality of second protrusions 30c may be formed on the surface portion.

In addition, a rectangular grip 30d is integrally formed on one side of the second reinforcing member 30b formed on the peripheral frame of the second filter body 30a.

  By the way, in order to make the second filter 30 formed in this way into the shape as shown in FIG. 4, the second filter 30 is wound in the direction of the arrow P1 shown in FIG. It will be formed in the roll shape as shown in FIG. In addition, what is necessary is just to fix end surfaces with an adhesive agent etc. in order to maintain this roll shape.

  Therefore, the difference between the second filter 30 and the first filter 20 is only the difference in whether or not the grip portion 30d is provided. Therefore, the second filter 30 has the same effect as the first filter 20. . In addition, by providing the grip part 30d in the second filter 30, the second filter 30 can be easily and easily extracted from the paint supply part 9.

  Therefore, according to the present embodiment described above, the first filter 20 that captures dust is provided in the paint nozzle 12 or the second filter 30 that captures dust is provided in the paint supply unit 9. The situation where dust is ejected from the paint nozzle 12 can be reduced. Therefore, according to this embodiment, the finish of painting of a to-be-coated object can be improved.

  Furthermore, according to the present embodiment, the first filter 20 that captures dust is provided in the paint nozzle 12, and further, the second filter 30 that captures dust is provided in the paint supply unit 9. It is possible to further reduce the situation of spraying from the paint nozzle 12. Therefore, it is possible to further improve the finish of painting the article to be coated.

  In the present embodiment, an example in which the first filter 20 and the second filter 30 are formed of an elastic resin has been shown. Moreover, the shape of the 1st filter 20 and the 2nd filter 30 is not restricted to a roll shape, What kind of shape may be sufficient.

  Further, the present invention is not limited to the shape of the paint spray gun shown in the present embodiment, and can be applied to paint spray guns of various shapes such as a gravity paint spray gun.

1 paint spray gun body 9 coating material supply unit 12 paints the nozzle 20 first filter <br/> 20a first reinforcing member 20c first filter the body 20b first protrusion 30 second filter <br/> 30a second filter Books Body 30b second reinforcing member 30c second protrusion

Claims (4)

A paint spray gun main body, a paint nozzle for spraying paint provided on the front end side of the paint spray gun main body, and a paint supply unit provided in the paint spray gun main body for supplying the paint into the paint spray gun main body A paint spray gun filter for use in a paint spray gun having
A first filter provided in the paint nozzle for capturing dust and / or a second filter provided in the paint supply unit for capturing dust;
The first filter and / or the second filter is formed in a roll shape,
The first filter has a mesh-like first filter body having a plurality of through holes, and the passage of the paint in the paint nozzle formed on the front surface or the back surface of the first filter body. A plurality of first protrusions that reduce the situation of being obstructed by dust trapped in the mesh of
The second filter has a mesh-like second filter main body having a plurality of through holes, and the second filter main body allows the paint to pass through the paint supply portion formed on the front surface portion or the back surface portion of the second filter main body. A paint spray gun filter comprising: a plurality of second protrusions that reduce a situation where the dust is trapped by dust trapped in the mesh. The filter for a paint spray gun according to claim 1, wherein a first reinforcing member is formed on a peripheral frame of the first filter body. The paint spray gun filter according to claim 1 or 2, wherein a second reinforcing member is formed on a peripheral frame of the second filter body. The coating spray gun using the filter for coating spray guns of any one of Claims 1-3 .

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