JP6810549B2 - Paint gun cleaning device - Google Patents

Description

The present invention relates to a paint gun cleaning device that cleans a paint gun with a cleaning liquid.

Conventionally, as this type of painting gun cleaning device, the cleaning liquid and compressed air are ejected from different holes and merged in front of the painting gun, so that the cleaning liquid collides with the painting gun by the pressure of the compressed air for cleaning. What to do is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-034623 (paragraph [0046], FIG. 4)

However, a device having a higher cleaning power than the above-mentioned conventional coating gun cleaning device has been desired.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a coating gun cleaning device having higher cleaning power than before.

The invention of claim 1 made in order to achieve the above object is formed on a body having a cancer receiving portion for receiving a painted gun and an inner surface of the cancer receiving portion, and ejects a cleaning fluid into the cancer receiving portion. It is connected between a cleaning liquid spout for the purpose, an internal flow path formed in the body and having the cleaning liquid spout at the end, a fluid supply flow path including the internal flow path, and a compressed air supply source. The air valve, the liquid valve connected between the fluid supply flow path and the cleaning liquid supply source, the cleaning liquid is supplied to the fluid supply flow path, and then the compressed air is supplied to the fluid supply / supply flow. together supplied to the road, paint gun and the compressed air and the cleaning liquid and a jet controller for controlling the air for bubbles and the liquid valve to be supplied alternately to the fluid delivery channel It is a cleaning device.

The invention of claim 2 includes a three-way valve for selectively connecting either one of the compressed air supply source or the cleaning liquid supply source to the fluid supply flow path as the air valve and the liquid valve. The coating gun cleaning device according to claim 1 .

The invention of claim 3 comprises a body having a cancer receiving portion for receiving a coating gun, a cleaning fluid ejection port formed on the inner surface of the cancer receiving portion and for ejecting a cleaning fluid into the cancer receiving portion, and the body. An internal flow path formed inside and having the cleaning liquid ejection port at the end, an air valve connected between the fluid supply flow path including the internal flow path and the compressed air supply source, and the fluid supply. A liquid valve connected between the flow path and the cleaning liquid supply source, and the air so as to supply the cleaning liquid to the fluid supply flow path and then supply the compressed air to the fluid supply flow path. The air is provided with a three-way valve that includes a bubble and an ejection control unit that controls the liquid valve, and selectively connects either the compressed air supply source or the cleaning liquid supply source to the fluid supply flow path. It is a painting gun cleaning device provided as both a valve for liquid and a valve for liquid .

The invention of claim 4 is the coating gun cleaning according to claim 3 , wherein the ejection control unit controls the three-way valve so that the cleaning liquid and the compressed air are alternately supplied to the fluid supply flow path. It is a device .

In the invention of claim 5, the body has an annular shape, and the internal flow path has an annular flow path corresponding to the ring shape of the body and an inner surface of the gun receiving portion from a plurality of positions in the circumferential direction of the annular flow path. The coating gun cleaning apparatus according to any one of claims 1 to 4, which includes an ejection flow path extending to the end and serving as a cleaning liquid ejection port.
The invention of claim 6 is provided with two ejection systems including the air valve, the liquid valve, and the fluid supply flow path to which they are connected, and the ejection control unit is one of the ejection systems. 1 to 5 for controlling so that at least a part of the period for ejecting the cleaning liquid from the cleaning liquid ejection port included in the above and the period for ejecting the cleaning liquid from the cleaning liquid outlet included in the other ejection system are deviated from each other. The coating gun cleaning device according to any one of the above.

The coating according to any one of claims 1 to 6 , wherein the invention of claim 7 is provided with a compressed air ejection portion for generating an air curtain at a receiving port of the cancer receiving portion in the body. It is a machine cleaning device.

請Motomeko 1, 3 of the spray gun cleaning apparatus, jetting the cleaning liquid together with the compressed air by supplying the compressed air to rinse jets from the cleaning liquid is supplied to the fluid supply passage provided in the end from the cleaning liquid ejection port. As a result, the cleaning liquid in the fluid supply flow path in front of the cleaning liquid ejection port is pushed out of the cleaning liquid ejection port by the compressed air and collides with the coating gun more strongly than before, and the coating gun can be cleaned with a higher cleaning force than before. become.

Spray gun cleaning apparatus請Motomeko 1 and 4, the compressed air and cleaning liquid can be brought into collision many of the cleaning liquid to the spray gun in a short time by alternately supplying the fluid supply channel, detergency enhancing To do.

According to the spray gun cleaning apparatus請Motomeko 5, it is possible to clean the entire circumference of the spray gun efficiently.

In the spray gun cleaning apparatus請Motomeko 2,3, spray gun cleaning device can be made compact since the combined and air valve and liquid valve with three-way valve.

Spray gun cleaning apparatus請Motomeko 6 comprises two ejection system comprising a fluid supply flow path thereof with air valve and the liquid valve is connected, from the cleaning liquid ejection port included in one of the ejection system Since the period for ejecting the cleaning fluid and the period for ejecting the cleaning fluid from the cleaning liquid outlet included in the other ejection system are different from each other, the pressure drop of the compressed air when using the two ejection systems is suppressed and the cleaning is efficient. It can be performed. It should be noted that the ejection period of the cleaning liquid from the cleaning liquid ejection port included in one ejection system and the ejection period of the cleaning liquid from the cleaning liquid ejection port included in the other ejection system do not completely overlap, but only a part thereof. Those in which are overlapped are also included in the present invention.

請painting gun cleaning apparatus Motomeko 7 is closed cancer receiving portion of the receiving opening by the air curtain, the cleaning liquid can be restricted from leaking from the gun receptacle.

Side sectional view of the coating gun cleaning device according to the embodiment of the present invention. Piping diagram of painting gun cleaning device and compressed air supply source, etc. On / off time chart of the 1st to 3rd valves Side sectional view of the painting gun cleaning device Square sectional view of the painting gun cleaning device

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4. In FIG. 1, reference numeral 10 is a painting gun, which is attached to the tip of an arm of a painting robot (not shown). The tip of the coating gun 10 is provided with a tapered head portion 12, and a bell cup 11 is assembled in the center of the tip surface of the head portion 12. Then, by rotating the bell cup 11, the paint can be atomized and sprayed to paint the work.

The coating gun cleaning device 20 of the present embodiment is used to clean the paint adhering to the tapered side surface 12A and the tip surface 12B of the head portion 12 in the coating gun 10 as described above, and its structure is as follows. ing. That is, the coating gun cleaning device 20 has a ring-shaped body 21, and the inside thereof is a gun receiving portion 22. Further, the body 21 is attached to the upper end portion of the cleaning liquid recovery drum 50, and receives the head portion 12 of the coating gun 10 into the gun receiving portion 22 from the upper surface opening 22A (corresponding to the “receptacle” of the present invention). The inner peripheral surface 21N of the body 21 has a shape having a tapered surface at the upper end of the cylindrical surface.

Inside the body 21, first to fourth annular flow paths 31 to 34 are provided in order from the upper side at intervals. Further, from a plurality of positions in the circumferential direction in each of the first to fourth annular flow paths 31 to 34, the first to fourth ejection flow paths 31A to 34A extend to the inner peripheral surface 21N, and the ends thereof. The openings are the first to fourth spouts 31F to 34F. Further, the inner diameters of the first to fourth ejection channels 31A to 34A are 0.2 to 1.5 [mm]. The inner diameters of the first to fourth ejection channels 31A to 34A may be the same or different. Further, the inner diameters of the plurality of ejection flow paths 31A (or 32A to 34A) arranged in the circumferential direction of the body 21 may be the same or different.

In the first to fourth annular flow paths 31 to 34, introduction flow paths D extend from two locations 180 degrees apart to the outer peripheral surface 21G. Then, a pair of first elbow joints 31B are connected to a pair of introduction flow paths D of the first annular flow path 31, and a pair of second elbows are connected to a pair of introduction flow paths D of the second annular flow path 32. The joint 32B is connected, a pair of third elbow joints 33B are connected to a pair of introduction flow paths D of the third annular flow path 33, and a pair is connected to a pair of introduction flow paths D of the fourth annular flow path 34. No. 4 elbow joint 34B is connected.

The compressed air supply source 52 and the cleaning liquid supply source 53 are connected to the first to fourth annular flow paths 31 to 34 via the first to third valves 41 to 43 shown in FIG.

The cleaning liquid supply source 53 is adapted to supply, for example, an organic solvent as a cleaning liquid by a pump. Examples of the organic solvent include those containing toluene, acetone, alcohol or benzene as main components, and in the present embodiment, thinner containing toluene as the main component is used. Water may be used as the cleaning liquid.

As the compressed air supply source 52, for example, a compressed air pipe installed in a factory is used. The compressed air pipe is supplied with air compressed to a predetermined pressure (for example, 0.1 to 1 [MPa]) by a compressor provided in a factory, for example.

The first to third valves 41 to 43 are, for example, air-driven valves, which are driven by compressed air. The first valve 41 includes one input port and one output port. A compressed air supply source 52 is connected to the input port via a pipe P, while a pair of first elbow joins 31B and 31B are connected to the output port via a pipe P that is bifurcated on the way. ing.

The second and third valves 42 and 43 are so-called three-way valves having two input ports and one output port. A compressed air supply source 52 is connected to each of the input ports of the second and third valves 42 and 43 (hereinafter, appropriately referred to as "air input port") via a pipe P, and each of the other input ports. A cleaning liquid supply source 53 is connected to (hereinafter, appropriately referred to as a “cleaning liquid input port”) via a pipe P. Further, a pair of second elbow joints 32B and 32B are connected to the output port of the second valve 42 via a pipe P that is bifurcated in the middle, and the output port of the third valve 43 is bifurcated in the middle. A pair of fourth elbow joints 34B and 34B are connected via a split pipe P.

In the present embodiment, the internal flow paths according to the present invention are configured from the above-mentioned second and fourth annular flow paths 32 and 34 and the second and fourth ejection flow paths 32A and 34A. Further, the internal flow path communicates with the second and fourth elbow joints 32B and 34B, and between the second and fourth elbow joints 32B and 34B and the second and third valves 42 and 43. The "fluid supply flow path" according to the present invention is configured from the pipe P. Further, in the present embodiment, nothing is connected to the pair of third elbow joints 33B and 33B, and the joints are in an unused state.

The first to third valves 41 to 43 described above are driven and controlled by the ejection control unit 54. Specifically, the ejection control unit 54 has a plurality of solenoid valves connected to air pipes for driving the first to third valves 41 to 43, and by turning these solenoid valves on and off, the first to first valves are used. The third valves 41 to 43 are turned on and off.

FIG. 3 shows an example of an on / off time chart of the first to third valves 41 to 43 from the start to the end of one cleaning process. Hereinafter, the operation and effect of the coating gun cleaning device 20 of the present embodiment will be described with reference to this time chart.

When the head portion 12 of the coating gun 10 is received by the gun receiving portion 22 by the operation of the coating robot, the ejection control unit 54 receives a trigger signal from the controller of the coating robot and starts the cleaning process by the coating gun cleaning device 20. To do. When the cleaning process is started, the first valve 41 is turned on (that is, in the “open state”) as shown in FIG. 3, and as shown in FIG. 4, a plurality of upper end portions of the coating gun cleaning device 20 are opened. Air is ejected from the first ejection port 31F of the above. As a result, an air curtain that closes the upper surface opening 22A of the cancer receiving portion 22 is generated.

Then, as shown in FIG. 3, the cleaning liquid input ports of the second and third valves 42 and 43 are turned on for a predetermined first ejection time T1 (for example, 0.1 to 1.2 [seconds]). To do. As a result, a predetermined amount of cleaning liquid is filled in the pipe P connecting the second and third valves 42 and 43 and the coating gun cleaning device 20, and a part of the pipe P is filled with the second and third annular flow paths 32. , 33 flows into.

Next, the air input port of the second valve 42 is turned on for a predetermined second ejection time T2. Then, the cleaning liquid remaining in the pipe P is pushed by the compressed air, flows into the second annular flow path 32 and spreads, and covers the inlets of the plurality of second ejection flow paths 32A connected to the second annular flow path 32. In this state, compressed air flows into the second annular flow path 32, and the cleaning liquid is ejected from the second ejection port 32F into the gun receiving portion 22 through the plurality of second ejection channels 32A (see FIG. 4). Then, the cleaning liquid is sprayed onto the tapered side surface 12A of the head portion 12 to clean the head portion 12. At that time, even if the cleaning liquid collides with the tapered side surface 12A and scatters, the air curtain of the upper surface opening 22A regulates the cleaning liquid to be discharged to the outside of the gun receiving portion 22. Further, at this stage, the fourth annular flow path 34 and the pipe P connected to the fourth annular flow path 34 are maintained in a state of being filled with the cleaning liquid.

The cleaning liquid input ports of the second and third valves 42 and 43 are then turned on for a predetermined third ejection time T3. As a result, the cleaning liquid is refilled in the second annular flow path 32 and the pipe P connected to the second annular flow path 32. Further, a cleaning liquid is further added to the filled cleaning liquid in the fourth annular flow path 34 and the pipe P connected to the fourth annular flow path 34.

Next, the air input port of the second valve 42 is turned on for a predetermined fourth ejection time T4. As a result, the cleaning liquid is again ejected from the second ejection port 32F into the gun receiving portion 22, and the head portion 12 is cleaned. Even at this stage, the fourth annular flow path 34 and the pipe P connected to the fourth annular flow path 34 are maintained in a state of being filled with the cleaning liquid. Then, after the end of the fourth ejection time T4 and the elapse of the predetermined time T5, the air input port of the third valve 43 is turned on for the predetermined sixth ejection time T6. As a result, the cleaning liquid accumulated in the fourth annular flow path 34 is ejected from the fourth ejection port 34F at once and sprayed onto the tapered side surface 12A and the tip surface 12B of the head portion 12, and the head portion 12 is cleaned. Then, at the end of the sixth ejection time T6, the first valve 41 is turned off (that is, the "blocked state" is reached), the air curtain is turned off, and one cleaning process is completed.

In the present embodiment, the third ejection time T3 described above is slightly longer than the first ejection time T1, the fourth ejection time T4 is slightly longer than the second ejection time T2, and the sixth ejection time T6 is the third. 2 The eruption time is set to be a plurality of times the length of T2.

As described above, in the coating gun cleaning device 20 of the present embodiment, the flow paths (second and fourth annular flow paths 32) provided with the cleaning liquid outlets (second and fourth ejection ports 32F, 34F) at the ends. , 34, pipe P, etc.), and then compressed air is supplied, and the cleaning liquid is ejected from the spout together with the compressed air. As a result, the cleaning liquid in the flow paths in front of the spout (second and fourth spout channels 32A, 34A) is pushed out of the spout by the compressed air and collides with the coating gun 10 more strongly than before, which is higher than before. It becomes possible to clean the painting gun 10 with the cleaning power.

Further, by alternately supplying the cleaning liquid and the compressed air to the flow path, a large amount of the cleaning liquid can be made to collide with the coating gun 10 in a short time, and the collision becomes stronger and weaker to improve the cleaning power. Moreover, it is provided with two ejection systems, and the ejection period of the cleaning liquid from the second ejection port 32F included in one ejection system and the ejection period of the cleaning liquid from the fourth ejection port 34F included in the other ejection system are mutually exclusive. Since they are out of alignment, it is possible to suppress the pressure drop of the compressed air when the two ejection systems are used and perform cleaning efficiently. Further, since the three-way valves (second and third valves 42 and 43) are used as both the air valve and the liquid valve, the entire coating gun cleaning device 20 can be made compact.

Further, the cleaning liquid may be atomized and ejected by the coating gun cleaning device 20 of the present embodiment, but in order to atomize the cleaning liquid, the supply path of the compressed air and the supply path of the cleaning liquid are orthogonal to each other, so-called. The entire painting gun cleaning device 20 can be made smaller than the Venturi type.
[Other Embodiments]

The present invention is not limited to the above-described embodiment, and for example, embodiments as described below are also included in the technical scope of the present invention, and various other than the following, as long as the gist is not deviated. It can be changed and implemented.

(1) In the coating gun cleaning device 20 of the above-described embodiment, the first to fourth ejection flow paths 31A to 34A extend in the radial direction of the body 21 when viewed from the central axis 25J direction of the body 21. As shown in 5, the ejection flow path 31Z may be inclined to one side with respect to the radial direction of the body 21V when viewed from the central axis 25J direction of the body 21V.

(2) In the coating gun cleaning device 20 of the above embodiment, a part of the flow path through which the compressed air and the cleaning liquid passes is an annular flow path, but a part of the flow path is not provided with the annular flow path. May be good.

(3) In the above embodiment, the ejection period in which the cleaning liquid is ejected from the second ejection port 32F and the ejection period in which the cleaning liquid is ejected from the fourth ejection port 34F are controlled so as not to completely overlap. However, it may be controlled so as to completely overlap, or the period for ejecting the cleaning liquid from the second outlet 32F and the period for ejecting the cleaning liquid from the fourth outlet 34F are controlled so as to partially overlap. You may. Further, for example, the cleaning liquid may be alternately ejected from the second ejection port 32F and the third ejection outlet 34F during the period when the cleaning liquid is ejected from the fourth ejection port 34F.

10 Paint gun 20 Paint gun cleaning device 21,21V Body 22 Gun receiving part 22A Top opening (receptacle)
31-34 First to fourth annular flow paths 31F to 34F Spout 42 Second valve (air bubble, liquid valve)
43 Third valve (air bubble, liquid valve)
52 Compressed air supply source 53 Cleaning liquid supply source 54 Ejection control unit

Claims (7)

A body with a cancer receptor that receives painted cancer,
A cleaning liquid ejection port formed on the inner surface of the cancer receiving portion and for ejecting the cleaning liquid into the cancer receiving portion,
An internal flow path formed in the body and having the cleaning liquid outlet at the end,
An air valve connected between the fluid supply flow path including the internal flow path and the compressed air supply source,
A liquid valve connected between the fluid supply flow path and the cleaning liquid supply source,
After supplying the cleaning liquid to the fluid supply flow path, the compressed air is supplied to the fluid supply flow path, and the cleaning liquid and the compressed air are alternately supplied to the fluid supply flow path. spray gun cleaning apparatus having the a jetting controller that controls the air for bubbles and the liquid valve, to. The first aspect of the present invention, wherein a three-way valve for selectively connecting either one of the compressed air supply source and the cleaning liquid supply source to the fluid supply flow path is provided as the air valve and the liquid valve. Paint gun cleaning device. A body with a cancer receptor that receives painted cancer,
A cleaning liquid ejection port formed on the inner surface of the cancer receiving portion and for ejecting the cleaning liquid into the cancer receiving portion,
An internal flow path formed in the body and having the cleaning liquid outlet at the end,
An air valve connected between the fluid supply flow path including the internal flow path and the compressed air supply source,
A liquid valve connected between the fluid supply flow path and the cleaning liquid supply source,
The air bubble and the ejection control unit for controlling the liquid valve so as to supply the cleaning liquid to the fluid supply flow path and then supply the compressed air to the fluid supply flow path are provided.
A coating gun cleaning device including a three-way valve that selectively connects either one of the compressed air supply source or the cleaning liquid supply source to the fluid supply flow path as the air valve and the liquid valve. The coating gun cleaning device according to claim 3, wherein the ejection control unit controls the three-way valve so that the cleaning liquid and the compressed air are alternately supplied to the fluid supply flow path. The body has an annular shape
The internal flow path is an annular flow path corresponding to the annular shape of the body, and an ejection flow path that extends from a plurality of positions in the circumferential direction of the annular flow path to the inner surface of the gun receiving portion and ends as the cleaning liquid ejection port. The coating gun cleaning apparatus according to any one of claims 1 to 4, comprising the above. Two ejection systems including the air valve, the liquid valve, and the fluid supply flow path to which they are connected are provided.
The ejection control unit includes at least a part of the period for ejecting the cleaning liquid from the cleaning liquid outlet included in one of the ejection systems and the period for ejecting the cleaning liquid from the cleaning liquid ejection port included in the other ejection system. The coating gun cleaning apparatus according to any one of claims 1 to 5, which is controlled so as to be displaced from each other. The coating machine cleaning device according to any one of claims 1 to 6, wherein the body is provided with a compressed air ejection portion for generating an air curtain at a receiving port of the gun receiving portion.

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