JPH09150079A - Electrostatic painting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally provide a paint tank in a housing to hold the rear end part thereof to earth patential to all dispense with the insulating means of the painting device supporting an electrostatic painting machine and to prevent the lowering of work efficiency even if the paint filling time to the paint tank is required slightly long. SOLUTION: A plurality of paint supply systems are formed by parallelly arranging a plurality of the connectors 9A, 9B communicating with a fine pipe like nozzle 8 supplying paint to a rotary atomizing head 4 and allowing a plurality of paint tanks 12A, 12B discharging paint to the respective connectors 9A, 9B by the pressure of an operating fluid to advance and retreat from a position separated by a predetermined insulating distance and connecting the paint outflow ports thereof to the connectors in a disengageable manner. The paint tank 12A is allowed to advance to perform painting and, in parallel to this painting, the other paint tank 12B is allowed to retreat from the position separated by the insulating distance to be engaged with a paint filling attachment 18B to be washed and, after washing is completed, the tank 12B is filled with paint.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic coating machine for supplying paint to a rotary atomizing head which is driven to rotate at a high speed and to which a high voltage is applied to atomize the same, and more particularly to a conductive paint such as water-based paint or metallic paint. TECHNICAL FIELD The present invention relates to an electrostatic coating machine suitable for electrostatically coating a conductive paint.

[0002]

2. Description of the Related Art Generally, electrostatic coating is performed on the electrostatic coating machine side by -8
A high voltage of 0 to 120 kV is applied, the side of the object to be coated is set to ground potential, an electrostatic field is formed between the electrostatic coating machine and the object to be coated, and the coating particles sprayed from the electrostatic coating machine are removed. By charging the cathode, it is electrostatically applied to the object to be coated, which is the opposite electrode of the anode. In this case, in order to prevent the high voltage applied to the electrostatic coating machine from leaking when coating conductive paint such as water-based paint or metallic paint with the electrostatic coating machine to which a high voltage is applied. , It is necessary to take insulation measures for the entire paint supply system from the electrostatic coating machine to the paint supply source through the paint supply pipe, especially multicolor for automobile painting which changes the paint color of dozens of colors. In the electrostatic coating apparatus, it is troublesome to insulate the paint supply system for each color paint.

Therefore, the applicant of the present invention has proposed an electrostatic coating device which does not require any insulation measures in the paint supply system for each color paint (Actual No. 4-87755, No. 4-87756).
Actual Kaihei 4-87758, Actual Kaihei 4-87759, Actual Kaihei 4-87760, Actual Kaihei 4-91755, Actual Kaihei 4-91756, Actual Kaihei 6-57444, Actual Kaihei 6-60451, Actual Kaihei 6-60452, JP-A-4
-63156, JP-A-4-200662). FIG. 5 is a flow sheet showing a schematic configuration thereof. A paint tank 43 for pressing a required amount of paint, which has flowed in from the paint inlet 41, at a predetermined flow rate from a paint outlet 42 by a cylinder 43a is an electrostatic coating machine 44. In addition to the above, a paint supply pipe 46 for selectively supplying each color paint, cleaning liquid, and cleaning air from the color changing device 45 is connected to the tank 43. Then, the paint supply pipe 46
Is divided into an upstream side 46A connected to the color changing device 45 and a downstream side 46B connected to the paint tank 43, and their tips are detachably connected from a position separated by an insulation distance. ing.

According to this, when the high voltage is not applied to the electrostatic coater 44, the paint is connected to the paint supply pipe 46 to store the paint in the paint tank 43, and the high voltage is applied to the electrostatic coater 44. At the time of the applied coating, the coating material supply pipe 46 is divided to electrically isolate the electrostatic coating machine 44 from the color changing device 45, and the coating material stored in the tank 43 is squeezed out for coating. There is. Therefore, if insulation measures are taken from the electrostatic coating machine 44 to the downstream side 46B of the paint supply pipe 46, the color changing device 45 can be supplied from each paint supply source (not shown).
It is not necessary to take any insulation measures up to the upstream side 46A of the paint supply pipe 46 via the.

[0005]

However, even in this case, since a high voltage is applied to the electrostatic coating machine 44, the electrostatic coating machine 44 is used for the lifting frame of an automatic coating apparatus such as a top machine or a coating robot. When it is attached to the tip of the weaving arm and used, the lifting frame and the weaving arm must support the electrostatic coating machine 44, the paint tank 43, etc., in an insulating manner, and further, the upstream side 46A of the paint supply pipe 46, etc. Must be supported separately. As shown in FIG. 6, the housing 5 of the electrostatic coating machine 44 is
If the machine body 54 including the rotary atomizing head 52 and the air motor 53, the paint tank 43, and the like are incorporated in the unit 1, the rear end portion 55 of the housing can be grounded and supported integrally. In this case, The problem remains that the electrostatic coating machine 44 becomes larger.

When the color is changed, a cleaning fluid such as cleaning liquid or cleaning air is supplied into the paint tank 43 or the rotary atomizing head 52 after the coating with the previous color paint is finished and before the coating with the next color paint is started. Supplying the rotary atomizing head 52 from the color changing device 45
The paint remaining in the paint supply system, which is long up to, must be removed by washing. Moreover, since a reciprocating drive type paint tank 43 is provided in the middle of the process, the washing work takes time, and Since the paint tank 43 must be filled with the next color paint after the cleaning is completed, there is a problem that the filling work also takes time and the work efficiency is reduced. It was difficult to install it on the automation coating line where the material is transported.

For example, in a car body painting line,
Since the conveyor speed is about 5 to 7 m / min and the distance between the car bodies is 2 to 3 m, the time from the end of painting of the preceding car body to the start of painting of the following car body is only about 30 seconds. Since there is no such thing, it is necessary to complete the above-mentioned cleaning work and filling work in the meantime.
Experiments conducted by the present inventors have revealed that the cleaning operation alone takes about 15 seconds and the filling operation takes about 45 seconds. In this case, the cleaning work can be shortened to about 10 seconds by increasing the supply pressure of the cleaning liquid and the cleaning air, but when filling the paint in the paint tank 43, high pressure is required. If paint is supplied with, air bubbles will be generated and it will cause paint failure, so it must be supplied at low pressure,
Therefore, the filling time of the paint cannot be extremely shortened, resulting in a problem that work efficiency is reduced. Therefore, in the present invention, a paint tank is integrally provided in the housing so that the rear end of the paint tank can be maintained at the ground potential, and no insulation measures are required for the coating device that supports the electrostatic coating machine. Even if the previous object to be coated with paint and the subsequent object to be coated with the next color paint are conveyed continuously, it is possible to perform color change coating without lowering work efficiency. Therefore, the technical issue is to downsize the electrostatic coating machine.

[0008]

In order to solve this problem, according to the present invention, an airframe in which a rotary atomizing head is attached to a tubular rotary shaft of an air motor is arranged on the tip side of a housing, and the tubular rotary shaft is provided with A thin tubular nozzle for supplying paint to the rotary atomizing head is inserted through the thin tubular nozzle while applying a high voltage to the rotary atomizing head and driving the air motor to rotate the rotary atomizing head at high speed. In the electrostatic coating machine for atomizing the supplied paint, on the back surface of the machine body, a plurality of connectors communicating with the thin tubular nozzles are arranged in parallel,
Inside the housing, a plurality of paint tanks for squeezing the paint by the pressure of the working fluid are arranged so as to be able to move forward and backward with respect to each connector from a position separated by a predetermined insulation distance, and the paint outlet of each paint connector is connected to each connector. A paint filling attachment that is detachably formed and selectively supplies the cleaning fluid and each color paint from the paint inlet formed in each paint tank to the paint tank in the retracted position. It is characterized in that it is arranged as possible.

According to this, for example, two connectors communicating with the thin tubular nozzle are arranged in parallel on the rear surface of the machine body, and two paint tanks are moved forward and backward from the positions separated by a predetermined insulation distance with respect to each connector. Paint inlets are respectively releasably disposed on the connector to form two paint supply systems. This paint tank is designed to press out the paint filled in the tank with the pressure of the working fluid by pressing the internal piston with the working fluid, so that the cylinder for driving the inner piston is not required. The electrostatic coating machine can be made compact. Also, since two paint supply systems are formed, while one paint tank filled with the previous color paint is advanced and its paint outlet is engaged with the connector for painting, the other paint tank To refill the paint tank by cleaning the interior of the paint tank by supplying the cleaning fluid such as cleaning liquid and cleaning air by engaging the paint filling attachment to the paint inlet and then supplying the next color paint to fill the paint. Even if the cleaning operation and the filling operation take a little longer, these operations are simultaneously performed in parallel with the painting operation, and can be finished and stand by during the application time of the previous color paint. Then, when the painting of the previous color paint is completed, the paint tank that was supplying the previous color paint is retracted, and the paint tank filled with the next color paint is advanced to engage the connector to apply the next color paint. Therefore, the coating efficiency does not decrease.

At this time, if a detachable cleaning attachment is provided for each connector, the tank supplying the previous color paint is retracted and the tank filled with the next color paint is advanced. By supplying the cleaning fluid to the thin tubular nozzle and the rotary atomizing head by engaging the cleaning attachment with each connector, the pre-colored paint remaining in the rotary atomizing head or the thin tubular nozzle or adhering to the connector can be removed for a short time. It can be removed by washing with. Then, when the cleaning of the rotary atomizing head or the thin tubular nozzle is completed, the paint tank filled with the next-color paint is advanced, and the paint outlet is engaged with the connector, so that the subsequent coating object If the coating with the next color paint is started, the coating with the next color paint can be resumed with a shorter interruption. Also, during that time, the paint filling attachment is engaged with the retracted paint tank to supply the cleaning fluid, and the previous color paint remaining in the paint tank or adhering to the paint inlet and paint outlet is washed and removed. After that, the next color paint is filled.

When the paint tank is filled with paint,
Even if a high voltage is applied to the machine body, the paint tank is retracted to a position separated by a predetermined insulation distance from the machine body.Therefore, engage the paint filling attachment to which the paint hose that is the grounding body is engaged, or the housing. Even if the rear end portion is maintained at the ground potential, the high voltage does not leak, and therefore it is not necessary to take an insulation measure for the paint hose connected to the paint filling attachment. In this case, each paint tank is covered with an insulating cover that has an opening in the front and the peripheral surface and bottom are sealed, and a paint inlet, a paint outlet, and a working fluid inlet are formed on the front side of the tank. Then, even if a high voltage is applied to one of the paint tanks engaged with the connector, since the peripheral surface and the back surface of the paint tank are covered with the insulating cover, the high voltage does not leak.
The other paint tank, the cleaning attachment, and the paint filling attachment need only have a predetermined insulation distance from the rear position of the machine body, and it is not necessary to separate them from the rear position of the one paint tank by a predetermined insulation distance. The machine becomes compact.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below based on the embodiments shown in the drawings. 1 and 2 are flow sheets showing a schematic configuration of the electrostatic coating machine according to the present invention as seen from a plane and a side surface.

In the figure, reference numeral 1 denotes an electrostatic coating machine in which a machine body 7 in which a rotary atomizing head 4 is attached to a tubular rotary shaft 6 of an air motor 5 is arranged on the tip side of a housing 3, and the tubular rotary shaft 6 is provided.
A thin tubular nozzle 8 for supplying paint to the rotary atomizing head 4 is inserted into the rotary atomizing head 4, and the high voltage supplied from a high voltage generator (not shown) disposed in the housing 3 is applied to the rotary atomizing head. Four
In addition to driving the air motor 5 to rotate the rotary atomizing head 4 at high speed, the paint supplied through the thin tubular nozzle 8 is atomized.
Then, on the back surface of the machine body 7, two connectors 9A, 9B communicating with the thin tubular nozzle 8 are arranged in parallel, and pipes 10A, 10B for connecting the respective connectors 9A, 9B to the thin tubular nozzle 8 are provided. Air-operated regulators 11A and 11B for quantitatively supplying the paint are interposed in the.

Behind the connectors 9A and 9B, there are two paint tanks 12A and 12B that press out the paint filled inside with the pressure of the working fluid.
It is arranged by 13B so as to be able to move forward and backward with respect to each connector 9A, 9B from a position separated by a predetermined insulation distance z, and the paint outlet Pout of each tank 12A, 12B is disengaged from each connector 9A, 9B. It is done like this. Each of the paint tanks 12A and 12B has a paint inlet Pin, a paint outlet Pout, and a working fluid inflow outlet OL formed on the front side thereof, and has an opening on the front side and the peripheral surface and the bottom surface are hermetically sealed. It is covered with a cup-shaped insulating cover C.
An internal piston 28 for partitioning the paint chamber and the working fluid chamber is provided in each of the tanks 12A and 12B, and a working fluid supply hose (not shown) is used to draw a working fluid inlet / outlet O during painting.
The internal piston 26 is pressed by the pressure of the working fluid supplied via L to expel the paint, and at the time of filling, the working fluid is expelled by the supply pressure of the paint fed from the paint inlet Pin. Are made to be filled.

Reference numeral 14 is a cleaning attachment for supplying a cleaning fluid such as cleaning liquid and cleaning air to clean and remove the residual paint, and cleaning nozzles 24A and 24B engaged with the connectors 9A and 9B are formed in a forward direction. At the same time, the connection ports 25A and 25B to which the cleaning fluid supply hose and the waste liquid recovery hose (not shown) are connected are formed in the rearward direction, and the thin tubular nozzle 8 and the cleaning liquid and cleaning air supplied from the cleaning nozzles 24A and 24B are used. The inside of the rotary atomizing head 4 is cleaned.

The cleaning attachment 14 is attached to the tip of a swing arm 15 that moves forward and backward with respect to the connectors 9A and 9B. When the swing arm 15 is swung by the cylinder 17 to the tip position, the cleaning nozzles 24A are provided. , 2
4B is positioned coaxially with the connectors 9A and 9B, and the cleaning nozzles 24A and 24B are moved back and forth by the cylinder 16 to be engaged with and disengaged from the connectors 9A and 9B. A waste liquid recovery connector 26 is detachable from a waste liquid outflow connector 27 provided on the machine body 7 so that the waste liquid from the thin tubular nozzle 8 can be discharged during cleaning.

18A and 18B are paint tanks 12
A paint filling attachment for selectively supplying a cleaning fluid such as a cleaning liquid and cleaning air and each color paint into A and 12B, and a cylinder 19A for the paint tanks 12A and 12B.
19B, the paint supply port Ps and the waste liquid port Dr are formed at positions facing the paint inlet Pin and the paint outlet Pout of each tank 12A, 12B, and the respective paint supply ports Ps are used as cleaning fluid and The waste liquid port Dr is connected to the color changing devices 2A and 2B that selectively supply each color paint via the paint hose 20, and the waste liquid port Dr is connected to the waste liquid hose 21.
It is connected to the waste liquid tank 22 via.

Reference numerals 23P and 23D denote paint supply ports Ps, of the paint filling attachments 18A, 18B.
It is a cylinder that removably advances and retracts the waste liquid port Dr with respect to the paint inflow port Pin and the paint outflow port Pout of each paint tank 12A, 12B. Further, the connectors 9A and 9B formed on the back surface of the machine body 7, the paint outlet Pout and the paint inlet Pin of the paint tanks 12A and 12B, the cleaning nozzles 24A and 24B of the cleaning attachments 14A and 14B, and the paint filling attachment. At the tips of the paint supply port Ps and the waste liquid port Dr of 18A and 18B, there are formed check valves that open only when they are engaged with each other and close when they are disengaged from each other.

Further, the housing 3 is formed of an insulating material, and the paint tank 12 housed in the housing 3
When A, 12B, the cleaning attachment 14, and the paint filling attachments 18A, 18B are all retracted, they are retracted to a position separated from the back surface of the machine body 7 by a predetermined insulation distance z, and the high voltage applied to the machine body 7 is grounded. It is configured so as not to leak to the paint tanks 12A, 12B, etc. on the side. At this time, since the paint tanks 12A and 12B are covered with a cup-shaped insulating cover C having an opening on the front surface and a closed peripheral surface and bottom surface, for example, one paint tank 12A is engaged with the connector 9A. Even when painting is performed by applying a high voltage to the machine body 7, the other paint tank 12
The front end position of B, that is, the paint outlet Pout, the cleaning attachment 14, and the paint filling attachments 18A and 18B
Need only be separated by a predetermined insulation distance z from the rear position of the machine body 7, and it is not necessary to separate it from the rear end position of the paint tanks 12A and 12B. Therefore, it is necessary to place them close to each other. Therefore, the electrostatic coating machine 1 can be designed compactly.

The above is an example of the configuration of the present invention, and its operation will be described below. For example, a case will be described in which the preceding object to be coated is painted with red paint, the subsequent object is painted with white paint, and the subsequent object is painted with blue paint. First, the paint filling attachment 18A is advanced to the paint tank 12A by the cylinder 19A, and the paint is supplied by the cylinder 23P while the waste liquid port Dr is kept closed without engaging the paint outlet Pout of the paint tank 12A. Only the port Ps is engaged with the paint inlet Pin to open, and the red paint is supplied from the color changing device 2A to the tank 12
Fill in A. On the other hand, the paint filling attachment 18B is advanced to the paint tank 12B by the cylinder 19B, and white paint is supplied from the color changing device 2B and filled in the tank 12B in the same manner as described above. Then, when the filling of the paint into each of the tanks 12A and 12B is completed, the cylinder 23P is contracted to release the engagement between the paint supply boat Ps and the paint inlet Pin, and the cylinders 19A and 19B are contracted to fill the paint. The attachments 18A and 18B are retracted.

Next, when the paint tank 12A is advanced by the cylinder 13A and the paint outlet Pout is engaged with the connector 9A and stands by, the working fluid is supplied to the paint tank 12A when the preceding object comes. The internal piston 26 is pressed by the pressure, and the red paint in the tank 12A is fed from the thin tubular nozzle 8 to the rotary atomizing head 4 at a constant flow rate via the paint regulator 11A, and the red paint is applied. .

When the painting is completed, the paint tank 1
The supply of the working fluid to 2A is stopped, the cylinder 13A is contracted, the paint tank 12A is retracted, and the paint outlet Pou
At the same time as disconnecting t from the connector 9A,
The cleaning attachment 14 is advanced to B, the cleaning nozzles 24A and 24B are engaged, and the cleaning liquid and the cleaning air are alternately supplied to clean and remove the residual paint in the thin tubular nozzle 8 and the rotary atomizing head 4. After the cleaning, cleaning attachment 1
4 is retracted.

Next, the paint tank 12B is advanced by the cylinder 13B, and the paint tank 12B is waited in a state where the paint outlet Pout is engaged with the connector 9B. When a subsequent object to be coated arrives, the working fluid is supplied to the paint tank 12B. The internal piston 26 is pressed by the pressure, and the white paint in the tank 12B is fed from the thin tubular nozzle 8 to the rotary atomizing head 4 at a constant flow rate via the paint regulator 11B, and the white paint is applied. .

On the other hand, the paint filling attachment 18A is engaged with the paint tank 12A which has retracted after the painting with the red paint, and the cylinders 23P and 23D connect the paint supply port Ps and the waste liquid port Dr, respectively. Pin and the paint outlet Pout are engaged, a cleaning liquid and cleaning air are supplied to wash and remove the previous color paint (red paint) remaining in the paint tank 12A, and then the waste liquid port Dr is retracted by the cylinder 23D to paint. The outflow port Pout is closed, and blue paint is supplied from the color changing device 2A this time, and the paint is filled in the paint tank 12A while pressing the internal piston 28 by the supply pressure to press out the working fluid.

Thus, the two paint tanks 12A, 1
2B is used, one paint tank 12A (12
While painting with B), the other paint tank 12B (1
2A) can be filled with paint and therefore each tank 12
Color change cleaning work and paint filling work of A and 12B can be performed with sufficient time, and even when the transfer interval of the coated object is short, the residual paint is sufficiently washed and removed to change the color. Since it can be painted, it does not cause paint defects such as color mixing.

FIG. 3 and FIG. 4 are flow sheets showing a schematic configuration of another embodiment according to the present invention as seen from the plane and the side. The same parts as those in FIGS. 1 and 2 are designated by the same reference numerals, and detailed description thereof will be omitted. In the present example, the paint filling attachment 30 for filling the paint after cleaning the inside of each paint tank 12A, 12B is
It is located above A and 12B, and is slid by a cylinder 31 so that it can be positioned with respect to each tank 12A and 12B.

In addition, the paint filling attachment 30 includes
Connect the paint supply port Ps and the waste liquid port Dr to the paint inlet P
Cylinders 32P and 32D for advancing and retracting and engaging with in and the paint outlet Pout are provided. The paint supply port Ps is connected to the color changing device 2 via the paint hose 20, and the waste liquid port Dr is connected to the waste liquid tank 22 via the waste liquid hose 21. In this way, the paint filling attachment 30 is moved to move each paint tank 1
If the paint inlet Ps and the paint outlet Pout of 2A and 12B are engaged, the paint filling attachment 30
The number of the paint supply systems from the color changing device 2 to the paint filling attachment 30 does not need to be branched or arranged side by side, so that the piping can be simplified accordingly.

In the above description of the embodiment, the case where two paint tanks are used has been described, but the case where more paint tanks are used may be used. However,
If the number of paint tanks is increased, the electrostatic coating machine becomes larger accordingly. Therefore, it is most preferable to select the necessary minimum number for the purpose of downsizing the electrostatic coating machine. Further, although the case where the waste liquid flows out from the paint outlet Pout in each of the paint tanks 12A and 12B has been described, the waste liquid outlet may be separately formed. Furthermore, although the case where the cleaning attachment 14 is arranged to be detachable from the connectors 9A and 9B has been described, the present invention is not limited to this, and for example, the paint outlet P of the paint tanks 12A and 12B.
The paint tanks 12A, 12B, the thin tubular nozzles 8, the rotary atomizing head 4 are provided so as to be detachable from the paint inflow port Pin in a state where the out is connected to the connectors 9A, 9B.
It may be a case where the remaining paint inside is removed by washing.

[0029]

As described above, according to the present invention, the paint tank is arranged in the housing, and the paint tank is moved forward and backward from a position separated by a predetermined insulation distance from the machine body to which the high voltage is applied. High voltage does not leak even if the rear end of the housing is at ground potential, and it is not only possible to eliminate the need for insulation measures for the coating equipment that supports the electrostatic coating machine, but it is also possible to alternate multiple paint tanks. It is possible to wash one side while painting the other, so that the preceding object coated with the previous color paint and the subsequent object coated with the next color paint are continuous. Even when it is transported by a method, it has a very excellent effect that color change coating can be performed without lowering work efficiency. Moreover, since each paint tank is designed to press out the paint by the pressure of the working fluid, there is no need to provide a pressurizing cylinder, and the electrostatic coater can be downsized accordingly. .

If the cleaning attachment is engaged with each connector and the thin tubular nozzle and the rotary atomizing head are cleaned after the application of the previous color paint and before the application of the next color paint,
There is also an effect that it is possible to further shorten the discontinuation time before starting coating with the next color paint on the subsequent object to be coated. Furthermore, since the paint tank is covered with a cup-shaped insulating cover, even when the connector is engaged and a high voltage is applied, the cleaning attachment and paint filling attachment housed in the housing are It suffices if it is a predetermined insulation distance from the rear position, and there is no need to separate it from the rear end position of the paint tank.
It also has the effect that the electrostatic coating machine can be made compact.

[Brief description of the drawings]

FIG. 1 is a flow sheet showing a schematic configuration of an electrostatic coating machine of the present invention when seen from a plane.

FIG. 2 is a flow sheet showing a schematic configuration as viewed from the side.

FIG. 3 is a flow sheet showing a schematic configuration of another embodiment viewed from a plane.

FIG. 4 is a flow sheet showing a schematic configuration as viewed from the side.

FIG. 5 is a flow sheet showing a conventional device.

FIG. 6 is a flow sheet showing a conventional device.

[Explanation of symbols]

1 ... Electrostatic coating machine 2, 2A, 2B
..Color changer 3 ... Housing 4
..Rotary atomizing head 5 ... Air motor 6 ...
..Tubular rotary shaft 7 ... Machine body 8 ...
..Thin tubular nozzles 9A, 9B .. Connectors 12A, 12B ..
・ ・ Paint tank Pin ・ ・ ・ ・ ・ ・ Paint inlet Pout ・ ・ ・ ・
..Paint outlet OL .... Working fluid inlet / outlet 13 ... Insulation cover 14 ..... Cleaning attachment 18A, 18B..Paint filling attachment

Claims (3)

[Claims] 1. An airframe (7) having a rotary atomizing head (4) attached to a tubular rotary shaft (6) of an air motor (5) is arranged on the distal end side of a housing (3), and the tubular rotary shaft (6). ), A thin tubular nozzle (8) for supplying paint to the rotary atomizing head (4) is inserted to apply a high voltage to the rotary atomizing head (4) and drive the air motor (5). In the electrostatic coating machine that atomizes the paint supplied from the thin tubular nozzle (8) while rotating the rotary atomizing head (4) at high speed, the thin tubular nozzle (8) is provided on the back surface of the machine body (7). A plurality of connectors (9A, 9B) communicating with each other are arranged in parallel, and inside the housing (3), a plurality of paint tanks (12A, 12B) that press the paint by the pressure of the working fluid are provided. It is arranged so that it can move back and forth to each connector (9A, 9B) from a position separated by an insulation distance, and the paint leaks out. A paint inlet (Pi) is formed in each paint tank (12A, 12B) so that a connector (9A, 9B) can be detachably attached to the connector (9A, 9B).
The paint filling attachments (18A, 18B) for selectively supplying the cleaning fluid and the respective color paints into the inside from n) are detachably arranged to the paint tanks (12A, 12B) in the retracted position. An electrostatic coating machine characterized by that. 2. A cleaning attachment (14) for supplying a cleaning fluid to the thin tubular nozzle (8) and the rotary atomizing head (4) through the respective connectors (9A, 9B) is provided with the respective connector (9).
A, 9B) or each connector (9A, 9B)
Of each paint tank (12A, 12B) connected to
The electrostatic coating machine according to claim 1, wherein the electrostatic coating machine is arranged so as to be detachable from (in). 3. Each of the paint tanks (12A, 12B) is covered with a cup-shaped insulating cover (13) having an opening at the front and a closed peripheral surface and bottom, and a paint inlet on the front side. (Pi
The electrostatic coating machine according to claim 1, wherein n), a paint outlet (Pout) and a working fluid inlet (OL) are formed.