JP3136037B2 - Painting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating machine in which the action of spraying paint from a sprayer or the range of paint spraying can be adjusted by changing the pressure value of coating air.

[0002]

2. Description of the Related Art Heretofore, as a coating machine, an electrostatic coating machine for applying a coating by reversely charging an object to be coated and paint particles and electrically adsorbing the paint particles to the object to be coated, and a method of coating the paint with compressed air. 2. Description of the Related Art An air spray type coating machine that sprays on a workpiece in the form of a mist to perform coating is widely used. Electrostatic coating machines are widely used in automotive painting and the like because of their advantages such as good coating efficiency and formation of a coating film having a uniform thickness.

FIG. 3 shows a conventional configuration of such an electrostatic coating machine. In the figure, an electrostatic coating machine 10 includes a bell 12 as a sprayer built in a main body 11, an air turbine 13, a high-voltage power supply 14, and the like, and a bell 1 to which a high voltage is applied.
1 is rotated at a high speed to spray the paint while charging it. In some cases, the high-voltage power supply 14 is of a separate type that is not built in the main body 11.

[0004] Such an electrostatic coating machine 10 is formed so that the coating spray range (2θ) of the bell 11 can be adjusted by changing the pressure value P3 of the coating air (shaping air). When the pressure value P3 is increased, the paint spray range (2θ) is reduced, and when the pressure value P3 is decreased, the paint spray range is expanded. This pressure value P
3 is a pressure gauge 3 attached immediately before the main body 11 of the shaping air pipe 30 (or the main body 11 itself).
5 is read.

[0005] Since the electrostatic coating machine 10 is installed in the painting booth A inside the building and the high-pressure air source 20 is installed outside C, the shaping air piping 30 between the main body 11 and the roof wall B is provided. Is, for example, 10 to 30 m. Therefore, the pipe length between the main body 11 and the high-pressure air source 20 is naturally longer than 10 to 30 m, and the pressure drop is also large.

On the other hand, since a high voltage of, for example, about 90 kV of a negative electrode is applied to the bell 11, it is too dangerous for an operator to read the pressure value P3 with the pressure gauge 35 during operation. Further, every time it is necessary to adjust the paint spraying range (2θ), it is actually difficult for the operator to enter the painting booth A and read the pressure value P3 itself. This is not possible when the electrostatic painting machine 10 is mounted on a painting robot.

Thus, conventionally, the pressure drop (P1-P3) in the shaping air pipe 30 from the high-pressure air source 20 to the pressure gauge 35 is checked at the time of assembly adjustment or test operation, and during the coating operation, the high-pressure air source 20 is checked. The pressure value P3 is adjusted indirectly by adjusting the pressure value P1.

For example, the control unit 50 sends a pressure value P1
(Signal DSSP1) is set as the number of pulse signals, converted into an analog target value (signal ASSP1) by the D / A converter 45, and input to the pressure control unit 40 including the electropneumatic controller. Then, the pressure control unit 40 changes the pressure value P0 from the compressor (not shown) or the ultra high pressure air tank to the pressure value P1.
It is supposed that pressure reduction is adjusted.

In some cases, such a compressor or an ultrahigh-pressure air tank is used as the high-pressure air source 20, but the function of indirectly adjusting the pressure value P3 is essentially unchanged.

On the other hand, as shown in FIG. 4, the air spray type coating machine 10 compresses the paint with compressed air (atomized air) at a spray unit 15 (atomized air supply path 15s, paint supply path 15t) built in the main body 11. ) To form a mist and spray.

The air spray type coating machine 10 includes a main body 1 from a high pressure air source 20 through an atomizing air pipe 30s.
The pressure value (P) of the atomizing air supplied to the spray unit 15 in
By changing 3 '), the paint spraying action can be adjusted. When the pressure (P3 ′) is increased, the paint particles to be sprayed are reduced, and when the pressure (P3 ′) is reduced, the paint particles are increased.

Also, the paint spray range (2θ) of the spray unit 15
Is formed so as to be adjustable by changing the pressure value P3 of the shaping air supplied to the shaping air supply passage 12t in the main body 11 through the shaping air pipe 30.

The pressure values (P3, P3 ') of the above-mentioned coating air (atomizing air, shaping air) are attached immediately before the main body 11 of the pipe 30 (30s), similarly to the above-mentioned electrostatic coating machine. It is read by the pressure gauge 35 (35s). Each of the above coating machines is generally mounted on an automatic coating apparatus (coating robot) and is used for automatic coating.

[0014]

By the way, as the applicability to diversification, the high quality coating and the cost reduction become stronger, the paint spraying action or paint spray range (2
The demand for frequent adjustment of θ) and quantitatively with high precision has become stronger.

However, in the conventional electrostatic coating machine 10, the adjustment of the pressure value (P3) is performed by the shaping air piping 3
The pressure value of the high pressure air source 20 (P
Since the adjustment is made indirectly by the adjustment of 1),
I can't respond to those requests. In addition, since the control system must be an open loop, it is difficult to automate the operation.

On the other hand, the conventional air spray type coating machine 1
At 0, it is possible to visually adjust the pressure of the coating air (atomizing air and shaping air) with the pressure gauges (35, 35s) attached immediately before the main body 11, but every time the pressure is adjusted. There is a problem in that the operator enters and reads the paint booth A in which the paint mist floats from the viewpoint of health management and improvement of work efficiency. Therefore, even in the air spray type coating machine 10, the electrostatic coating machine 10
Similarly to the above, there is a need to establish a technology capable of accurately and quickly detecting the coating air supply pressure value (P3, P3 ′) outside the coating booth A away from the main body 11.

An object of the present invention is to provide a coating air supply pressure detecting device capable of accurately and quickly detecting a coating air supply pressure to a main body by using two pressure detectors mounted at positions distant from the main body. An object of the present invention is to provide a coating machine equipped with a device.

[0018]

SUMMARY OF THE INVENTION The present invention generally provides a coating air pipe (shaping air pipe, atomizing air pipe) connecting a main body and a high-pressure air source with a constant effective cross-section and a constant pressure loss per unit length. Paying attention to the fact that there are two pressure detectors attached to the distant position of the coating air piping, and the pressure drop per unit piping length between the mounting positions of both pressure detectors is calculated, and the pressure per unit piping length is determined. It is configured to calculate the coating air supply pressure in the main body by using the descent.

That is, in FIG. 1 which briefly shows the gist of the present invention, in principle, the main body 11 and the high-pressure air source 20 are provided.
A low-pressure side pressure detector (62) and a high-pressure side pressure detector (61) separated therefrom in the middle of a coating air pipe (for example, a shaping air pipe 30 of an electrostatic coating machine) between them.
Are provided. The mounting position of the low-pressure side pressure detector (62) is a second mounting position PST2 that is separated from the main body 11 by a pipe length L2 (for example, 8 m). (32) is the downstream pipe. The high pressure side pressure detector (61) is located upstream of the second mounting position PST2 by a predetermined pipe length L1 at a first mounting position PST1, that is, an upstream pipe (31) of the painting air pipe (30). ) Or high pressure air source 20.

Here, the high pressure value detected by the high pressure side pressure detector (61) is represented by P1 (signal SP1) and the upstream side pipe (3).
The pressure drop at the pipe length L1 of 1) is ΔP12, and the low pressure value detected by the low pressure side pressure detector (62) is P2.
(Signal SP2), assuming that the pressure drop at the pipe length L2 of the downstream pipe (32) is ΔP23, the coating air supply pressure value in the main body 11, that is, the pressure value P3 can be obtained by Expression (1). P3 = P1- △ P12- △ P23 (1)

Then, unit pipe length {pressure drop per L}
If P is constant, equations (2) and (3) hold. ΔP12 = P1−P2 (2) ΔP23 = L2 / L1 × ΔP12 (3) Therefore, if Expression (2) and Expression (3) are substituted into Expression (1), Expression (4) is obtained. Becomes P3 = P1− (P1−P2) − [L2 / L1 × (P1−P2)] (4) Thus, rearranging equation (4) results in equation (5). P3 = P2 × (1 + L2 / L1) −L2 / L1 × P1 (5)

Therefore, the second mounting position PST2 (piping length L2) of the low pressure side pressure detector (62) and the first mounting position PST1 (piping length L1) of the high pressure side pressure detector (61).
Is determined, and both pressure values (P1, P2) detected by both pressure detectors (61, 62) can be used to easily calculate the coating air supply pressure value (P3). That is, the pipe length ratio L2 / L1 is set as a fixed value in the pressure value calculation means 50, and the pressure value P3 is accurately and quickly calculated only by inputting the low pressure value P2 and the high pressure value P1 as variables. it can.

Further, if the pipe length ratio L2 / L1 is set to "1", equation (5) is simplified to equation (6).
The pressure value P3 can be calculated more easily using only the two pressure values P1 and P2. P3 = 2P2-P1 (6)

Similarly, the atomizing air supply pressure value is determined.

Here, the coating machine according to the present invention has a built-in sprayer for spraying a paint in a main body, and changes a pressure value of a coating air supplied from a high-pressure air source to thereby perform a paint spraying action or a paint spraying. In a coating machine in which the range is adjustable, a low-pressure side pressure detector provided at a second mounting position in the middle of a coating air pipe connecting the main body and the high-pressure air source and separated from the main body. A high-pressure side pressure detector provided at a first mounting position or the high-pressure air source at a predetermined pipe length away from the second mounting position in the middle of the coating air pipe, and A low pressure value detected by the side pressure detector, a high pressure value detected by the high pressure side pressure detector, and an upstream side between the high pressure air source or the first mounting position and the second mounting position. Piping length, the second mounting position, and the main body And a pressure value calculating unit for calculating a pressure value of the coating air supplied to the main body by using a pipe length ratio to a downstream pipe length between the coating air supply pressure detecting device and a coating air supply pressure detecting device. It is characterized by.

[0026]

According to the present invention having the above construction, when the coating air is supplied from the high pressure air source to the main body through the coating air pipe, the high pressure value (P1) detected by the high pressure side pressure detector is obtained.
And the low pressure value (P2) detected by the low pressure side pressure detection are input to the pressure value calculating means, and the pipe length ratio L2 / L
1 is preset as a fixed value. Therefore,
The pressure value calculating means can immediately calculate the supply pressure value (P3) of the coating air that changes every moment based on the equation (5) [or the equation (6)].

Therefore, the calculated pressure value (P
If 3) is formed to be displayed on a display, for example, by adjusting the pressure value (P1) of the high-pressure air source while watching the displayed pressure value (P3), the coating air supply pressure value ( P3) can be accurately adjusted to a desired value. That is, the paint spraying action or the paint spraying range of the sprayer can be accurately and stably adjusted. Further, if the calculated pressure value (P3) is used as a feedback signal, the control system can easily be configured in a closed loop. Therefore, simply by setting the target value (P3), the paint spraying action or paint spray range can be reduced. Changes can be easily and accurately adjusted.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) The present coating machine 10 is an electrostatic coating machine. As shown in FIG. 2, the coating machine 10 includes a low pressure side pressure detector 62, a high pressure side pressure detector 61, and pressure value calculating means (51, 52). And a pressure detecting device (a shaping air supply pressure detecting device) which is attached to the mounting position (PST1, PST2) remote from the main body 11.
Using the two pressure values (P1, P2) detected at 1, 62, the supply pressure value (P3) of the coating air (shaping air) in the main body 11 can be detected quickly and accurately.

In this embodiment, the display control means (C
PU51, ROM52) and pressure value calculating means (5
The pressure value (P3) calculated in (1, 52) is displayed on the display unit 55, and is easily read.

Further, a feedback signal output control means (CPU 51, ROM 52) is provided to output the calculated pressure value (P3) as a feedback signal FSP3 to the pressure control unit 40, and to set its target value (signal S
By setting SP3), the shaping air supply pressure value (P3) can be automatically matched with the target value (SSP3).

Since the basic structure (10, 20, 30) is the same as that of the conventional example (FIG. 4), the same reference numerals are given to the same components, and the description thereof will be simplified or omitted. I do.

The low-pressure side pressure detector 62 is provided at a second mounting position PST2 remote from the main body 11 in the middle of the coating air pipe (shaping air pipe 30). The second mounting position PST2 is selected within a range of, for example, 5 to 10 m according to the value of the high voltage applied to the bell 12. The position may be determined as a position where the low-pressure side pressure detector 62 does not have an electrical obstacle related to the detection accuracy or the like by the electric resistance action of the shaping air flowing in the pipe 30. In this embodiment, since the high voltage value applied to the bell 12 is -90 kv, the pipe length L2 of the downstream pipe 32 is set to 8 m.
And

The low-pressure side pressure detector 62 detects the pressure value (P) of the shaping air at the second mounting position PST2.
2) is detected and the detected signal is a signal SP2 such as an electric signal or an air signal.
Any type can be used as long as the signal can be output as a signal, but in this embodiment, it is formed so as to be output as a digital electric signal SP2. The same applies to the high pressure side pressure detector 61.

The mounting position of the high-pressure side pressure detector 61 is separated from the second mounting position PST2 by a predetermined pipe length L1 in the middle of the shaping air pipe 30 in the middle of the shaping air pipe 30 as shown by a two-dot chain line in FIG. The first mounting position PST1 or the high-pressure air amount 20 indicated by the solid line (the first mounting position PST1)
1). In the case of this embodiment, the high-pressure air amount 20 is set as the first mounting position PST1. When removing the tank (20) having the buffer function, the first mounting position PST1 may be provided in the pipe 33 (= 31) on the downstream side of the pressure control unit 40.

Here, the ratio (L2 / L1) of the pipe length L2 of the downstream pipe 32 to the pipe length L1 of the upstream pipe 31 is as follows.
It may be arbitrarily selected in consideration of the distance from the main body 11 to the roof wall B, etc. In this embodiment, L2 / L1 = 1, that is, L2 = L1 = 8 m. However, it should be noted that in FIG. 2, L1> L2 is shown for convenience of code entry and the like.

Next, the pressure value calculating means outputs the detected low pressure value P2 (signal SP2) and the high pressure value P1 (signal SP2).
1) and means for calculating the pressure value (P3) of the coating air (shaping air) supplied to the main body 11 using the pipe length ratio L2 / L1, and in the case of this embodiment, the PC (50) It is composed of a ROM 52 storing a calculation program and a CPU 51. This personal computer forms a control unit 50.

The personal computer (50) includes a CPU 51, R
It includes an OM 52, a RAM 53, a printer 54, a display 55, a keyboard 56, an input port 57, an output port 58, and the like. Therefore, the above formula (5) is stored in the ROM 52 forming the pressure value calculating means (51, 52). However, in this embodiment, since the pipe length ratio L2 / L1 is "1", the equation (6) is stored.

The calculated pressure value (P3) is expressed as RA
The CPU 51 which is temporarily stored in the M53 and forms the display control means is configured to display on the display 55. The calculation cycle is, for example, every two seconds. Therefore, the operator can accurately know the shaping air supply pressure (P3) at the main body 11 while staying outdoors C, and quickly move to the predetermined paint spray range (2θ) corresponding to the desired pressure value (P3). And it can be adjusted accurately.

Further, the feedback signal output control means (51, 52) inputs the calculated pressure value (P3), that is, the feedback signal (FSP3), to the pressure control unit 40 (pressure controller 42) via the output port 58. , Forming a closed loop control system. The target value (signal SSP3) can be set by operating the keys on the keyboard 51, and this target value is also input via the output port 58.

The pressure control unit 40 includes a control valve 41 connected to a pipe 33 and a control valve P1.
It comprises a pressure controller 42 having a D control function and a pressure indicator 43. The super high pressure value P0 from a compressor (not shown) is reduced in pressure and supplied to the high pressure air source 20. That is, the pressure controller 42 receives the target value (signal SSP3) and the feedback signal FSP3 as inputs, adjusts the opening of the control valve 41 in accordance with the deviation, and adjusts the shaping air supply pressure (P
3) is controlled to be equal to the target value (SSP3).
In this sense, the smaller the capacity of the buffer tank (20), the better. Alternatively, it may be removed.

Next, the operation of this embodiment will be described. The pressure controller 42 is manually operated to reduce the pressure of the ultra-high pressure air (P0) and establish high pressure air at the high pressure air source 20. Therefore, the shaping air pipe 30 (31, 32)
And the shaping air is supplied to the main body 11 to form a paint spray range (2θ) corresponding to the pressure value (P3).

At this time, the high pressure side pressure detector 61 provided at the first mounting position PST1 detects the high pressure value P1 and outputs a signal SP1 to the control unit 50, and the low pressure side pressure detector 62 detects the low pressure value. It detects the value P2 and outputs a signal SP2. Then, the pressure value calculating means (51, 52) operates, and the two signals SP1, SP2 input through the input port 57 are input.
And the pipe length ratio L2 / L1 (= 1) to calculate the pressure value (P3) for each constant cycle.

The CPU 51 forming the display control means (51, 52) stores the calculated pressure value P3 in the RAM 5.
3 and is displayed on the display 55. Therefore, the operator can accurately know the shaping air supply pressure (P3) to the main body 11 in the control unit 50 outside C. Thus, the pressure controller 42
Is manually operated to adjust the displayed pressure value P3 to a desired pressure value (P3), whereby the desired paint spraying range (2θ) can be adjusted.

In the case of automatic driving, the target value (P3) is set to, for example, 150 KP by operating the keys on the keyboard 56.
(1.5 kgf / cm ² ) and issue an automatic operation command. Then, the set target value (signal SSP3)
And the calculated pressure value (P3), that is, the feedback signal FSP3, is output from the output port 58 and input to the pressure controller 42. Therefore, a closed loop control system is established, so that the opening of the control valve 41 is adjusted, and the pressure value (P3) in the main body 11 is adjusted.
Is automatically controlled to reach the target value (150 KP).

According to the first embodiment, however, the shaping air pipe 30 connecting the main body 11 and the high-pressure air source 20 is provided at the second mounting position PST2 in the middle and away from the main body 11. The low pressure side pressure detector 62 and the second mounting position P in the middle of the shaping air pipe 30.
The high pressure side pressure detector 61 and the low pressure side pressure detector 62 provided at the first mounting position PST1 or the high pressure air source 20 (the first mounting position PST1) separated from the ST2 by a predetermined pipe length on the upstream side. The detected low pressure value (P2), the high pressure value (P1) detected by the high pressure side pressure detector 61,
Pipe length ratio L between upstream pipe length L1 and downstream pipe length L2
2 / L1 and the pressure value of the shaping air (P
A shaping air supply pressure detecting device comprising pressure value calculating means (51, 52) for calculating 3) is provided, and the detected high pressure value (P1) and low pressure value (P2) are set to a preset pipe length ratio. Since the shaping air supply pressure (P3) in the main body 11 is calculated and automatically detected by using L2 / L1, the worker does not enter the painting booth A and a high voltage is applied. The shaping air supply pressure (P3) can be accurately and quickly known without approaching the main body 11, and the paint spray range (20) of the bell 12 can be accurately and stably changed and adjusted.

The low pressure side pressure detector 62 is
Second mounting position P away from the pipe length L2 (= 8m)
Since it is provided in ST2, there is no obstacle due to the influence of high voltage via the low pressure side pipe 32 and flowing shaping air, so that the low pressure value (P2) can be detected more accurately and stable operation can be performed.

Further, since the pipe length ratio L2 / L1 is selected to be "1", the calculation of the pressure value is much easier. Therefore, it is possible to form the pressure value calculating means from a simpler and less expensive logic operation circuit.

Further, the pressure value calculating means is provided in the control unit 5.
0 is formed from the CPU 51 of the personal computer and the ROM 53, so that the cost burden is light, the realization is easy, and the calculation processing can be performed at high speed.

Further, since the display control means (51, 52) is provided so that the calculated pressure value (P3) is displayed on the display 55, the shaping air supply pressure (P3) can be reduced more easily. And you can know exactly.

Further, a feedback signal output control means (51, 52) is provided, and a closed loop control system using the calculated pressure value (P3) as the feedback signal FSP3 is formed. If only the target value (signal SSP3) is set, the paint spray range (2θ) can be quantitatively and stably adjusted and changed.

(Second Embodiment) A coating machine 1 according to a second embodiment.
Reference numeral 0 denotes an air spray type coating machine. As shown in FIG. 1, coating air having the same configuration as the shaping air supply pressure detecting device (62, 61, 51, 52) of the first embodiment (FIG. 2). The configuration is provided with a supply pressure detecting device. Components common to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted or simplified.

The coating air supply pressure detecting device is as follows.
A coating air pipe [shaping air pipe 30 (atomizing air pipe 30) connecting the main body 11 and the high pressure air source 20.
s)] and the low pressure side pressure detector 62 (62s) provided at the second mounting position PST2 remote from the main body 11.
A first mounting position PST1 or a high-pressure air source 20 (a first mounting position PST1) which is separated from the second mounting position PST2 by a predetermined pipe length on the upstream side of the second mounting position PST2 in the middle of the coating pipe 30 (30s). High pressure side pressure detector 61 provided in
(61s), the low pressure value P2 (P2 ′) detected by the low pressure side pressure detector 62 (62s), and the high pressure side pressure detector 6
1 (61s), the high pressure value P1 (P1 ') detected,
Pipe length ratio L between upstream pipe length L1 and downstream pipe length L2
2 / L1 and shaping air (atomizing air)
Pressure value calculating means (5) for calculating the pressure value P3 (P3 ′) of
1,52), and the detected high pressure value P1 (P
1 '), a low pressure value P2 (P2'), and a preset piping length ratio L2 / L1 to calculate and automatically detect shaping air (atomized air) supply pressure P3 (P3 ') in the main body 11. Since it is formed so that it can be made, the operator can know the coating air supply pressure (P3, P3 ') accurately and quickly without entering the painting booth A,
The paint spraying action and paint spraying range can be accurately and stably changed and adjusted.

In the first and second embodiments, the high-pressure side detector 61 (61s) and the low-pressure side detector 62 provided at the first and second mounting positions (PST1, PST2).
(62s), each pressure value [P1 (P1 '), P2
(P2 ′)], the pressure value (P) of the coating air (shaping air, atomizing air) supplied to the main body 11
(3, P3 ′) is calculated, but a position different from the above-mentioned mounting position (for example, before a portion where pressure loss suddenly changes,
(After), a pressure detector is further provided, and the above pressure values (P3, P
3 ′) may be configured to be corrected. With this configuration, even if the coating air pipe (30, 30s) has a portion where the pressure drops rapidly, the coating air supply pressure value can be calculated more accurately.

[0054]

According to the present invention, there is provided a low-pressure side pressure sensor provided at a second mounting position in the middle of a coating air pipe connecting a main body and a high-pressure air source and away from the main body. A high pressure side pressure detector provided at a first mounting position or a high pressure air source which is separated from the second mounting position by a predetermined pipe length in the middle of the coating air pipe on the upstream side, and the low pressure side pressure detector The high pressure value detected by the high pressure side pressure detector, the high pressure air source or the upstream pipe length between the first mounting position and the second mounting position, Pressure detecting means for calculating the pressure value of the coating air supplied to the main body using the ratio of the pipe length to the downstream side pipe length between the mounting position and the main body of the coating air supply pressure detection means The system is equipped with the equipment, so the worker can use the It is possible to know the earth supply pressure to accurately and quickly, with the paint spray action or paint spray range of the sprayer can be adjusted accurately and stably, it is possible to construct a control system as a closed loop.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing the gist of the present invention and a second embodiment.

FIG. 2 is a diagram for explaining a first embodiment of the present invention.

FIG. 3 is a view for explaining a conventional electrostatic coating machine.

FIG. 4 is a view for explaining a conventional air spray type coating machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electrostatic coating machine 11 Main body 12 Bell (sprayer) 15 Spraying part (sprayer) 20 High pressure air source 30 Shaping air pipe (painting air pipe) 30s Atomizing air pipe (painting air pipe) 31, 31s Upstream pipe 32 , 32s Downstream piping 40 Pressure control unit 41 Control valve 42 Pressure controller 50 Control unit 51 CPU (Pressure value calculation means) 52 ROM (Pressure value calculation means) 53 RAM 55 Display 56 Keyboard 61, 61s High pressure side pressure detector 62 , 62s Low pressure side pressure detector P1 High pressure value P2 Low pressure value P3 Pressure value of shaping air supply pressure P3 'Pressure value of atomization air supply pressure L1, L2 Pipe length PST1 First mounting position PST2 Second mounting position

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B05B ⁷ /00-7/32 B05B 12/00-13/06 G01L 7/00

Claims (1)

(57) [Claims] 1. A coating machine having a built-in sprayer for spraying a coating material in a main body and capable of adjusting a coating spraying action or a coating spray range by changing a pressure value of a coating air supplied from a high pressure air source. A low-pressure side pressure detector provided at a second mounting position that is located in the middle of a coating air pipe that connects the main body and the high-pressure air source and that is separated from the main body, and that is located in the middle of the coating air pipe. A high pressure side pressure detector provided at a first mounting position or the high pressure air source which is separated from the second mounting position by a predetermined pipe length on the upstream side, and a low pressure detected by the low pressure side pressure detector. The high pressure value detected by the high pressure side pressure detector, the high pressure air source or the upstream piping length between the first mounting position and the second mounting position, and the second mounting position. Pipe with the downstream pipe length between the pipe and the body Equipped with a air supply pressure sensing device for coating comprising a pressure value calculation means for calculating a pressure value of the paint air supplied to the main body by using the ratio, coating machine, characterized in that.