JPS6244758Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a painting gun, and more particularly to a painting gun equipped with a plurality of filters so that any filter can be switched and used.

(Prior art) It has already been shown in Japanese Utility Model Publication No. 11386/1986 that a filter for filtering paint should be built into the paint gun itself to prevent dust and foreign matter from getting mixed in and adhering to the paint film. As is well known, these devices only contain a single filter, so they can be used to coat different objects, for example, for undercoating and topcoating, or for solid coating and metallic coating. When switching between several types of coating, the filter must be replaced each time, and the work of attaching and removing the filter may stain equipment, clothing, etc., or significantly reduce work efficiency. occurs.

(Purpose) This invention was made in view of these problems,
The object is to provide an improved coating gun that can easily and quickly perform multiple coatings by simply changing the flow path without attaching or detaching a filter.

(Structure) Therefore, the details of the present invention will be explained below based on illustrated embodiments.

FIG. 1 shows an embodiment of the present invention equipped with two filters for filtering paint.
In the painting gun body shown in , two cylindrical filters 13a, 13b are built in parallel in the holder 2, and each filter 13a, 13b is attached to the holder 2.
It is configured to filter the paint flowing in from each paint inlet 12a, 12b at the lower end and supply it to a paint nozzle source chamber 15 provided on the upstream side of the needle valve 16 via each paint guide pipe 14a, 14b. There is.

In addition, these filters 1 are placed in this holder 2.
Air introduction passage 22 and ventilation valve 2 are installed on the sides of 3a and 13b.
3 is provided, and the pressurized air flowing in from the air inflow path 21 at the lower end of the holder 2 is passed through the above-mentioned vent valve 23.
The paint is guided through the paint nozzle 17 to an annular jet nozzle 24 opened around the paint nozzle 17, and by jetting pressurized air from there, the paint from the paint nozzle 17 is attracted and sprayed.

On the other hand, the paint nozzle source chamber 15 described above is provided with a flow path that communicates with the cleaning liquid inlet 32.
Furthermore, a cleaning liquid supply hose 36 is connectable to a quick coupling 31 with a check valve provided at the cleaning liquid inlet 32, and as shown in FIG. The above-mentioned paint nozzle source chamber 15 is connected to the paint nozzle source chamber 15 via the pressure pump 35.
It is designed to be able to be introduced internally.

In addition, the reference numeral 3 in the figure is a trigger for opening and closing the needle valve 16 and the ventilation valve 23, and 11a and 11b are
A quick joint with a check valve is shown for connecting a paint supply hose (not shown) during painting, and to connect drain hoses 41a and 41b during cleaning.

In the embodiment described above, when painting with the first paint, two filters 13a,
After connecting the paint supply hose to the quick coupling 11a that communicates with one filter 13a suitable for the application or paint type among the filters 13b, the trigger 3 of the painting gun 1 is pulled in the same manner as in the conventional device, and the needle valve 1 is closed.
6 and at the same time open the ventilation valve 23 to blow out pressurized air from the annular jet nozzle 24,
The paint filtered through a is induced to be sprayed from the paint nozzle 17 to perform painting.

Next, in order to apply the next paint with this paint gun 1, connect the quick joint 1 that was connected earlier.
Remove the paint supply hose from 1a and connect the fitting 11 here.
While connecting the drain hose 41a with the plug 42 that releases the non-return action of the cleaning liquid inlet 3
A cleaning liquid supply hose 36 is connected to the quick joint 31 provided in 2.
After connecting, the pressure pump 35 is operated.
As a result, the cleaning liquid in the cleaning liquid tank 33 enters the paint nozzle source chamber 15 from the cleaning liquid inlet 32, and
Further, the paint flows through the paint guide tube 14a toward the previously used filter 13a in a direction opposite to the flow of the paint, washes off the paint adhering there, and discharges it from the drain hose 41a. Also, during this cleaning process, the trigger 3 is pulled to spray the cleaning liquid into the paint nozzle 17.
If the paint is ejected from the flow path, the paint adhering to this flow path can also be removed at the same time.

In some cases, drain hoses 41a, 41b may be connected to both joints 11a, 11b as shown in FIG.
It is also possible to connect the two filters 13a and 13b at the same time to remove dust, foreign matter, etc. attached thereto.

In the embodiment shown in FIG. 3, check valves 18a and 18b are provided in each of the paint guide pipes 14a and 14b extending from the paint filters 13a and 13b to the paint nozzle source chamber 15, respectively. Rapid joints 19a and 19b with check valves are provided between the stop valves 18a and 18b and the filters 13a and 13b, so that the cleaning liquid supply hoses 36 can be connected individually.

In this example, the filter 1 to be cleaned is
By connecting one side 36a of the cleaning fluid supply hose to the quick coupling 19a that communicates with the filter 3a, it is possible to clean only one filter 13a. It is possible to prevent paint from entering the paint guide tube 14 and filter 13.

(Effects) As described above, according to the present invention, multiple paint supply channels equipped with filters are provided in the paint gun body, so when changing the purpose or the paint used, it is possible to simply feed the paint with the filter attached. Painting can be done by switching paths, and the workability can be significantly improved.

Furthermore, since the cleaning fluid supply flow path is connected to the flow path from each filter to the paint nozzle, one or more of the used filters can be selectively cleaned with the filter installed to prevent paint from mixing. In addition, paint or dust adhering to the filter can be effectively removed by the cleaning liquid flowing in the opposite direction to the paint.

[Brief explanation of the drawing]

Fig. 1 is a side view of an apparatus showing one embodiment of the present invention, Fig. 2 is a circuit diagram showing the cleaning processing state of the same apparatus, and Fig. 3 is a side view of the apparatus showing another embodiment of the invention. It is a circuit diagram. 1...Painting gun, 3...Trigger, 12a, 12b
...Paint inlet, 13a, 13b...Filter,
15...Paint nozzle source chamber, 22...Air introduction path,
32...Cleaning liquid inlet, 33...Cleaning liquid tank,
41...Drainage hose, 11a, 11b, 19a,
19b, 31... Rapid joint.

Claims (1)

[Scope of utility model registration request] A plurality of paint supply passages each having a paint filter are provided inside the main body, and a cleaning liquid supply passage connectable to a cleaning liquid supply pipe is connected to the passage from each of the filters to the paint nozzle. Paint gun.