JP3572389B2 - Paint supply device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a paint supply device for supplying a paint to a painting means, for example, a painting means for painting a car body.
[0002]
[Prior art]
2. Description of the Related Art For example, a coating equipment that performs coating such as middle coating and top coating on an automobile body is provided with a paint supply device that supplies a paint to a coating gun and the like. The paint supply device includes a circulation type and a cartridge type.
[0003]
Circulation type paint supply equipment is a large circulation pipe that connects a paint storage room called a paint supply room and a paint gun in a paint booth provided at a sufficient distance from the paint storage room. The paint is supplied from the paint storage chamber to the paint gun through the pipes connected to the pipe. In the paint supply device having such a configuration, pipes are provided for several times of the paint color.
[0004]
Further, the cartridge type paint supply device includes a paint cartridge filled with an amount of paint necessary for painting for one vehicle body, a storage device containing a plurality of paint cartridges, and a paint cartridge taken out from the storage device. And a cartridge transport device for loading the cartridge into the painting robot. In the paint supply device having such a configuration, the paint is supplied by automatically setting the paint cartridge to the painting robot.
[0005]
[Problems to be solved by the invention]
However, in the conventional circulation type paint supply apparatus, since the distance between the paint storage chamber and the paint gun is long, a large amount of paint necessary to fill the piping connecting them has to be prepared. In addition, when the number of paint colors increases, it is necessary to increase the number of pipes, and there is a problem that equipment costs increase in addition to preparation of paint.
[0006]
In addition, a cartridge-type paint supply device requires a large-scale device to automatically set the paint cartridge in a painting robot, which increases equipment costs, and also complicates the work of filling each cartridge with paint. There is a problem that also increases.
[0007]
The present invention has been made in order to solve the problems associated with the above conventional technology, and does not require the preparation of a large amount of paint, and a paint capable of suppressing an increase in equipment cost as much as possible even if paint colors increase. It is intended to provide a supply device.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 for achieving the above object incorporates a pig into a supply pipe to which coating means is connected so as to be freely transferable, and pushes and transfers the pig with a cleaning agent for cleaning the inside of the supply pipe. A paint supply device characterized in that the paint filled in the downstream side in the transport direction of the pig is supplied to the coating means.
[0009]
According to a second aspect of the present invention, a pig set composed of a pair of pigs is incorporated in a supply pipe to which a coating means is connected so as to be transportable, and the pig set is pushed and transferred by a cleaning agent for cleaning the inside of the supply pipe. The paint supply device supplies the paint filled between the pair of pigs in the pig set to the coating means.
[0010]
The invention according to claim 3 is characterized in that a paint filling section for filling paint between a pair of pigs in the pig set is provided in the supply pipe.
[0011]
The invention according to claim 4 is characterized in that the supply pipe is configured to be able to circulate and transfer the pig assembly.
[0012]
The invention according to claim 5 is to stop the first pig on the downstream side in the transfer direction in the pig assembly, further press and transfer the second pig on the upstream side with the cleaning agent, and supply the paint to the coating means. It is characterized by.
[0013]
The invention according to claim 6, wherein a stopping means for stopping the first pig,
Detecting means for detecting that the first pig has reached a predetermined stop position;
And control means for stopping the first pig by operating the stop means when the detection means detects that the first pig has reached the stop position.
[0014]
The invention according to claim 7 is characterized in that a plurality of coating means are connected to the supply pipe, and the number of the pig assemblies is equal to the number of the coating means.
[0015]
【The invention's effect】
The present invention configured as described above has the following effects.
[0016]
According to the first aspect of the present invention, the inside of the supply pipe can be cleaned at the same time as the supply of the paint, and the paint of a large number of paint colors can be supplied using the same pipe. Further, since it is not necessary to provide a dedicated supply pipe for each color, an increase in equipment cost can be suppressed as much as possible even if the number of coating colors increases.
[0017]
According to the invention as set forth in claims 2 to 4, in addition to the effect of the invention as set forth in claim 1, there is no need to put the paint into the cartridge as in a cartridge type paint supply device, and the coating means is reduced. Large equipment is not required for transportation. In addition, since the paint only needs to be filled between the pair of pigs, there is no need to prepare a large amount of paint at the time of the initial filling as compared with the case where the entire pipe is filled with the paint, which is excellent in cost. . Also, since only the amount of paint required for one coating is transported and the excess amount of paint is not circulated, deterioration of the paint itself is prevented, and high-quality coating can always be performed. It is the most suitable paint supply device for supplying a small amount of paint.
[0018]
According to the fifth and sixth aspects of the present invention, the structure of the means for supplying the coating material to the coating means is simplified, and the cost is also excellent. In addition, this paint supply device supplies paint in a form similar to a paint supply device that is currently frequently used, that is, a form in which paint is supplied through a piping system. It can be configured by remodeling such as providing additional piping, and the initial cost in equipment costs can be reduced.
[0019]
According to the seventh aspect of the present invention, since the number of pig groups equal to the number of the coating means is incorporated, the paint can be supplied to each coating means quickly and efficiently.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0021]
FIG. 1 is an overall configuration diagram showing an embodiment of a paint supply device according to the present invention.
[0022]
The paint supply device 10 according to the present embodiment supplies multicolor paints to the paint guns 11 and 12 as painting means for each color. In brief, in the supply pipe 20 to which the paint guns 11 and 12 are connected. Pigs 31f, 31r, 32f, and 32r are incorporated so as to be freely transportable, and the pigs 31f, 31r, 32f, and 32r are pushed and transported by a thinner as a cleaning agent for cleaning the inside of the supply pipe 20, and the pigs 31r, 32r are transported downstream in the transport direction. The paint filled on the side is supplied to coating guns 11 and 12.
[0023]
More specifically, as shown in FIG. 1, the paint supply device 10 includes a supply pipe 20 to which coating guns 11 and 12 are connected, and the supply pipe 20 includes a pair of pigs 31f and 31r. A pig set 32 composed of a pig set 31 and a pair of pigs 32f and 32r is movably incorporated. Further, the supply pipe 20 is provided with a paint filling unit 60 that fills the paint between the pair of pigs 31f and 31r in the pig set 31 and between the pair of pigs 32f and 32r in the pig set 32. In the illustrated example, a plurality (two) of first and second coating guns 11 and 12 are connected to the supply pipe 20, and the number of pig assemblies 31 and 32 is equal to the number of coating guns 11 and 12. The number of sets (two in the illustrated example) is incorporated. Each of these two sets of pigs 31 and 32 is pushed and transferred by a thinner, and the paint filled between the pair of pigs 31f, 31r, 32f and 32r in each of the pigs 31 and 32 is coated with the coating guns 11 and 12. To supply. Of the two pig assemblies 31 and 32, the upstream pig assembly 31 is used to supply paint to the first coating gun 11 along the transport direction, and the downstream pig assembly 32 is used for the second coating. Used to supply paint to gun 12. In the following description, the upstream pig group 31 is also referred to as a first pig group 31, and the downstream pig group 32 is also referred to as a second pig group 32.
[0024]
The coating guns 11 and 12 are, for example, rotary atomizing type electrostatic coating guns (bell guns) provided with a rotating cup-shaped spray head, and are provided via branch pipes 13 and 14, a color change valve CCV and a gear pump FGP. And is connected to the supply pipe 20. The paint is sent to the paint guns 11 and 12 at a constant flow rate by the gear pump FGP. The color change valve CCV is connected not only to the supply pipe 20 in the present embodiment but also to a separate paint supply device (not shown) for supplying paint that is frequently used or used in a large amount. The coating operation is performed by switching between the paint supplied from the supply pipe 20 and the paint supplied from the separate paint supply device by the color change valve CCV.
[0025]
The supply pipe 20 is formed in a circulation flow path so as to circulate and transfer the pig assemblies 31 and 32. The paint supply device 10 includes a tank 22 that cleans the supply pipe 20 and stores a thinner for circulating the pig assemblies 31 and 32. The thinner in the tank 22 is discharged at a predetermined pressure by a discharge pump 23 and supplied to the supply pipe 20 through an inlet pipe 24. The pig assemblies 31 and 32 are pushed by a thinner discharged from the discharge pump 23 and are transferred at a predetermined speed (for example, 1 m / s or less). The thinner after transferring the pig assemblies 31 and 32 is recovered again in the tank 22 via the outlet pipe 25. A first three-way valve 41 is provided at a connection part between the supply pipe 20 and the inlet pipe 24, and a fifth three-way valve 45 is provided at a connection part between the supply pipe 20 and the outlet pipe 25.
[0026]
The paint filling unit 60 includes a filling pipe 61 provided in parallel with the supply pipe 20, a communication pipe 62 that communicates the filling pipe 61 with the supply pipe 20, and a color A (for example, red) paint. , A tank 63b storing a paint of B color (for example, blue), and a tank 63t storing a thinner. The A-color paint in the tank 63a is discharged by the discharge pump 64a, and is supplied into the filling pipe 61 through the on-off valve 65a. The B color paint in the tank 63b is discharged by the discharge pump 64b, and is supplied into the filling pipe 61 through the on-off valve 65b. The thinner is discharged by the discharge pump 64t and supplied into the filling tube 61. A three-way valve 66 is provided on the way to the filling pipe 61 at a portion communicating with the tank 63t, and a drain valve 67 is provided near the other end. Between the three-way valve 66 and the drain valve 67 of the filling pipe 61, the communication pipe 62 and the on-off valves 65a and 65b are in communication. The other end of the filling tube 61 is connected to a collection device (not shown) for collecting paint and thinner discharged when cleaning the inside of the filling tube 61 and the like.
[0027]
In the paint supply apparatus 10 of the present embodiment, the first pigs 31f and 32f on the downstream side in the transport direction in each pig set 31 and 32 are stopped, and the second pigs on the upstream side, that is, the rear pigs 31r and 32r are stopped by thinner. The paint is further pushed and transported to supply the A color paint or the B color paint to the coating guns 11 and 12.
[0028]
In order to realize such a paint supply mode, the paint supply device 10 includes a stopping means 70 for stopping the front pigs 31f and 32f, and a detecting means for detecting that the front pigs 31f and 32f have reached a predetermined stop position. 71, and control means 72 for activating the stop means 70 to stop the front pigs 31f, 32f when the detection means 71 detects that the front pigs 31f, 32f have reached the stop position. I have.
[0029]
In the present embodiment, the stopping means 70 includes a third three-way valve 43 and a fourth three-way valve 44 provided on the supply pipe 20. The third three-way valve 43 is located downstream of the branch pipe 13 for the first coating gun 11, and the fourth three-way valve 44 is located downstream of the branch pipe 14 for the second coating gun 12. ing.
[0030]
Further, a second three-way valve 42 is provided upstream of the third three-way valve 43. The second three-way valve 42 and the third three-way valve 43 are connected to introduction pipes 46 and 47 for supplying a thinner for pushing the rear pigs 31r and 32r into the supply pipe 20. When pushing the rear pigs 31r, 32r, the thinner is fed into the supply pipe 20 through the introduction pipes 46, 47 at a pressure of 2-3 kgf / cm2G. In addition to providing a pump separate from the discharge pump 23 as a supply source of the thinner that pushes the rear pigs 31r, 32r, a form in which the discharge pressure of the thinner discharged from the discharge pump 23 is adjusted and guided to the introduction pipes 46, 47 may be adopted. Good.
[0031]
Further, a plurality of discharge pipes 81a to 81d provided with opening / closing valves 80a to 80d are provided on the way of the supply pipe 20, so that no thinner remains between the front and rear pigs 31f and 31r and between the front and rear pigs 31f and 32r. A part of the paint discarded from each of the discharge pipes 81a to 81d and a thinner are collected by a collecting device (not shown). Each valve is constituted by a remotely controllable electromagnetic valve.
[0032]
A magnet (not shown) is attached to the front pigs 31f, 32f, and a magnetic sensor is disposed upstream of the third and fourth three-way valves 43, 44 as detecting means 71 for detecting the magnet. The magnetic sensor 71 is arranged at a position corresponding to the stop position of the front pigs 31f, 32f. Although not shown, a plurality of magnetic sensors are arranged at appropriate locations in order to detect the timing of transport of the pig groups 31 and 32.
[0033]
The control unit 72 including a CPU, a timer, a memory, and the like, controls the opening and closing of the on-off valves 65a, 65b, 80a to 80d and the drain valve 67 based on a predetermined time chart and a signal from the magnetic sensor 71. The switching control of the flow path by the three-way valves 41 to 45 and 66 is performed. The first to fifth three-way valves 41 to 45 switch the flow path to either a line A indicated by a solid arrow in the drawing or a line B indicated by a broken arrow in the drawing. For example, when the magnetic sensor 71 detects that the front pig 31f in the first pig set 31 has reached a predetermined stop position, the control means 72 switches the flow path of the third three-way valve 43 to line B, and the front pig 31f Not move.
[0034]
FIG. 2 is a flowchart showing the operation of the paint supply device 10, and FIGS. 3 to 14 are diagrams for explaining a paint supply procedure by the paint supply device 10.
[0035]
The entire operation of the paint supply device 10 will be described with reference to FIG.
[0036]
First, in the paint filling section 60 of the supply pipe 20, one set of pigs 31 (32) is located at the filling position, and the A color paint is filled between the front pig 31f (32f) and the rear pig 31r (32r). (S1). The number of pig sets 31 and 32 is equal to the number of coating guns 11 and 12. When the filling of the A-color paint is completed, each pig set 31, 32 is transported by a thinner to convey the A-color paint (S2), and each pig set 31, 32 is set at the paint supply position (S3). When the pig sets 31 and 32 are set at the paint supply position, the transfer of the front pigs 31f and 32f is stopped, and the positions are fixed.
[0037]
Next, the rear pigs 31r, 32r in the pig assemblies 31, 32 set at the paint supply position are further pushed in by a thinner, and the A color paint filled between the front and rear pigs 31f and 31r, 32f and 32r is painted. It is supplied to the guns 11 and 12 (S4).
[0038]
When the supply of the A-color paint is finished, the fixed state of the front pigs 31f and 32f is released, the pig sets 31 and 32 are transported again by thinner, and the pig sets 31 and 32 are sequentially moved to the filling position in the paint filling unit 60. Collect (S5). Next, at the filling position, the inside of the pig set 31 (32) where the A-color paint remains remains is washed with a thinner (S6).
[0039]
Then, a space between the washed front pig 31f (32f) and the rear pig 31r (32r) is filled with the B color paint of the next paint color B (S7), and the above-described steps are repeated (S2 to S7). S6).
[0040]
The paint supply procedure will be described with reference to FIGS.
[0041]
<< Filling of A color paint 1 (S1) >>
As shown in FIG. 3, the first to fourth three-way valves 41 to 44 are switched to line A, the fifth three-way valve 45 is switched to line B, the discharge pump 23 is operated, and the thinner in the tank 22 is connected to the inlet pipe 24. The supply pipe 20 is supplied through the supply pipe 20, and the entire inside of the supply pipe 20 is filled with a thinner.
[0042]
The second pig set 32 is recovered up to the filling position in the paint filling unit 60, and the space between the front pig 32f and the rear pig 32r has already been cleaned by thinner. On the other hand, the first pig set 31 is recovered to a position slightly upstream from the filling position, but the paint of the previous paint color B remains in the space between the front and rear pigs 31f and 31r. I have.
[0043]
Next, the space between the front and rear pigs 32f and 32r of the second pig set 32 is filled with an amount of A color paint required for painting. That is, the discharge pump 64a is operated, and the A-color paint in the tank 63a flows through the on-off valve 65a → the filling pipe 61 → the communication pipe 62 to fill the space between the front and rear pigs 32f and 32r. At this time, the on-off valves 80a and 80b are temporarily opened to discard a part of the A-color paint from the discharge pipes 81a and 81b so that the thinner does not remain between the front and rear pigs 32f and 32r.
[0044]
<< Filling of A color paint 2 (S1) >>
As shown in FIG. 4, when the filling of the A color paint into the second pig set 32 is completed, the first three-way valve 41 is switched to the line B, and the second pig set 32 is moved rearward by the thinner fed from a path (not shown). It is pushed from the rear side of the pig 32r and sent out to the downstream position of the first three-way valve 41. With the transfer of the second pig set 32, the A-color paint filled between the front and rear pigs 32f, 32r is carried.
[0045]
When the first pig set 31 is pushed by the thinner and collected to the filling position, the first three-way valve 41 is switched to the line A, and the B color paint remaining between the front and rear pigs 31f and 31r is washed with the thinner. Then, the first pigment set 31 is filled with the A color paint by the same operation as described above.
[0046]
<< Transport of A-color paint (S2) >>
As shown in FIG. 5, when the filling of the A color paint into the first pig set 31 is completed, the first three-way valve 41 is switched to the line B, and the first pig set 31 is moved to the downstream position of the first three-way valve 41. Send it out by thinner. With the transfer of the first pig set 31, the A color paint filled between the front and rear pigs 31f and 31r is transported.
[0047]
After that, the first three-way valve 41 and the fifth three-way valve 45 are switched to the line A, and the first and second pig sets 31 and 32 are pushed by the thinner discharged from the discharge pump 23 to the coating guns 11 and 12. Transfer to the branch point. Along with the transfer of the first and second pig sets 31, 32, the filled A-color paint is also transported. At the time of this transfer, the on-off valve 80c is opened and a part of the color A paint is discarded from the discharge pipe 81c so that the thinner does not remain between the front and rear pigs 31f and 31r and between the front and rear pigs 31f and 32r.
[0048]
In parallel with the operation of transferring the pig assemblies 31 and 32, the inside of the pipe in the paint filling unit 60 is cleaned. That is, the on-off valves 65a and 65b are closed, the drain valve 67 is opened, the A-color paint remaining in the pipe is discharged, and the inside of the pipe is cleaned by thinner discharged from the discharge pump 64t. After the washing is completed, the drain valve 67 and the on-off valves 80a and 80b are closed.
[0049]
<< Pig Set 31, 32 Set 1 (S3) >>
The transfer of the first and second pig sets 31 and 32 is continued, and each of the pig sets 31 and 32 is set to the paint supply position.
[0050]
As shown in FIG. 6, when the first pig group 31 on the upstream side reaches the paint supply position before the second pig group 32 on the downstream side, the magnetic sensor 71 detects the first pig group 31. It detects that the front pig 31f has reached a predetermined stop position. Then, the control means 72 switches the third three-way valve 43 to the line B. Thereby, the transfer of the front pig 31f is stopped, and its position is fixed.
[0051]
<< Pig Set 31, 32 Set 2 (S3) >>
As shown in FIG. 7, the second pig group 32 is pushed from the rear side of the rear pig 32r by the thinner fed from the third three-way valve 43 switched to the line B, and the second pig group 32 is directed toward the paint supply position. Transfer. When the magnetic sensor 71 detects that the front pig 32f of the second pig set 32 has reached the predetermined stop position, the control means 72 switches the fourth three-way valve 44 to line B. As a result, the transfer of the front pig 32f is stopped, and its position is fixed.
[0052]
When the setting of the pig assemblies 31 and 32 to the paint supply position is completed, the open / close valves 80c and 80d are opened, and the thinner is discarded from the discharge pipes 81c and 81d. The discarded thinner is collected by a collecting device (not shown).
[0053]
<< Supply of A-color paint 1 (S4) >>
As shown in FIG. 8, the second three-way valve 42 switched to the line B while the third three-way valve 43 is switched to the line B, that is, while the front pig 31f of the first pig set 31 is stopped. The rear pig 31r is pushed out by the thinner fed from the rear. As only the rear pig 31r is further transferred, the A-color paint filled between the front and rear pigs 31f, 31r is pressurized and flows from the branch pipe 13 → the color change valve CCV → the gear pump FGP to the first paint gun. 11 is supplied. Then, predetermined coating is started by the first coating gun 11.
[0054]
In addition, the fourth three-way valve 44 is fed from the third three-way valve 43 which is switched to the line B while the fourth three-way valve 44 is switched to the line B, that is, while the front pig 32f of the second pig set 32 is stopped. The rear pig 32r is independently pushed out by the thinner. As only the rear pig 32r is further transferred, the A-color paint filled between the front and rear pigs 32f, 32r is pressurized, flows from the branch pipe 14 → the color change valve CCV → the gear pump FGP, and flows into the second coating gun. 12 is supplied. Then, predetermined coating is started by the second coating gun 12.
[0055]
<< Supply of A color paint 2 (S4) >>
As shown in FIG. 9, while transferring only the rear pigs 31r and 32r, the A color paint filled between the front pigs 31f and 32f is supplied to the coating guns 11 and 12, and the coating is continued. You.
[0056]
<< Recovery 1 of pig assemblies 31 and 32 (S5) >>
When the supply of the A-color paint is completed, the pig assemblies 31 and 32 are recovered to the filling position.
[0057]
As shown in FIG. 10, the second to fourth three-way valves 42 to 44 are switched to line A, the front pigs 31 f and 32 f are unlocked, and the pig assemblies 31 and 32 are discharged by thinner discharged from the discharge pump 23. Transfer. At this time, a part of the thinner for circulation flows through the branch pipes 13 and 14 → the color change valve CCV → the gear pump FGP → the first and second coating guns 11 and 12 to clean the inside of each coating gun 11 and 12.
[0058]
<< Recovery 2 of pig assemblies 31 and 32 (S5) >>
As shown in FIG. 11, the fifth three-way valve 45 is switched to the line B at a predetermined timing, and the pig assemblies 31 and 32 are guided to the paint filling unit 60. Further, the on-off valve 80b is opened, and the thinner remaining between the front pig 32f of the second pig set 32 and the first three-way valve 41 is discarded from the discharge pipe 81b.
[0059]
<< Washing 1 in pig assemblies 31 and 32 (S6) >>
As shown in FIG. 12, when the second pig set 32 is recovered to the filling position in the paint filling unit 60, the portion between the front and rear pigs 32 f and 32 r of the second pig set 32 is washed. That is, the on-off valve 80a is also opened, and the A-color paint remaining between the front and rear pigs 32f, 32r of the second pig set 32 is discarded from both the discharge pipes 81a, 81b. Further, the thinner of the tank 63t is discharged by the discharge pump 64t, and flows through the three-way valve 66 → the filling pipe 61 → the communication pipe 62 → the paint filling section 60.
[0060]
After the first pig group 31 on the upstream side is guided to the paint filling unit 60, the fifth three-way valve 45 is switched to the line A, and the thinner is circulated in the supply pipe 20.
[0061]
<< Washing 2 in pig assemblies 31 and 32 (S6) >>
As shown in FIG. 13, the A color paint is pushed out from each of the discharge pipes 81 a and 81 b by the thinner guided to the supply pipe 20, and the cleaning inside the second pig set 32 is completed.
[0062]
<< B-color paint filling (S7) >>
Then, as shown in FIG. 14, the B-color paint required for the next coating is filled in the cleaned second pig set 32. That is, the discharge pump 64b is operated, and the B color paint in the tank 63b flows through the on-off valve 65b → the filling pipe 61 → the communication pipe 62 to fill the space between the front and rear pigs 32f, 32r. At this time, the on-off valves 80a and 80b are temporarily opened to discard a part of the B-color paint from the discharge pipes 81a and 81b so that the thinner does not remain between the front and rear pigs 32f and 32r.
[0063]
Thereafter, the same operation as described above is repeated. That is, each of the pig sets 31 and 32 is transported by a thinner and set at the paint supply position, and only the rear pigs 31r and 32r are stopped by the thinner while the front pigs 31f and 32f of the pig sets 31 and 32 are stopped. It is further pushed and transferred, and the B color paint is supplied to each of the coating guns 11 and 12. When the supply of the B color paint is completed, each pig set 31, 32 is recovered to the filling position, and the next paint is supplied.
[0064]
As described above, the paint supply device 10 of the present embodiment pushes the pigs 31r and 32r used for pipe cleaning and the like with the thinner to transfer the inside of the supply pipe 20, and the downstream of the pigs 31r and 32r in the transfer direction is filled. Since the supplied paint is supplied to the coating guns 11 and 12, the supply pipe 20 can be cleaned at the same time as the supply of the paint, and paints of many paint colors can be supplied using the same pipe. Since there is no need to provide a dedicated supply pipe 20 for each color, an increase in equipment costs can be suppressed as much as possible even if the number of coating colors increases.
[0065]
In addition, between the pigs 31f and 31r, and between the pigs 32f and 32r, an amount of paint necessary for one coating is filled, and the pig sets 31 and 32 including the pair of pigs 31f and 31r and 32f and 32r are thinned. Since the paint is pushed and transferred through the supply pipe 20, and the paint filled in the pig assemblies 31, 32 is supplied to the coating guns 11, 12, the labor of putting paint into the cartridge as in a cartridge type paint supply device is eliminated. This eliminates the need for large equipment for transporting to the coating guns 11 and 12. In addition, since it is sufficient to fill the paint only between the pair of pigs 31f and 31r and between the 32f and 32r, it is not necessary to prepare a large amount of paint at the time of initial filling as compared with a case where the entire pipe is filled with the paint. It will be excellent.
[0066]
In addition, since the paint supply device 10 is configured to transport only an amount of paint necessary for one coating and not to circulate an excessive amount of paint, deterioration of the paint itself is prevented, and high quality is always achieved. Can be applied, and the paint supply device 10 is optimal for supplying a relatively small amount of paint.
[0067]
Further, the front pigs 31f, 32f are stopped, and the rear pigs 31r, 32r are further pushed and transferred by a thinner to supply the paint to the coating guns 11, 12, so that the paint for supplying the paint to the coating guns 11, 12 is provided. The configuration of the means is simple, and the coating material supply device 10 is also excellent in cost in this respect.
[0068]
In addition, the paint supply device 10 supplies the paint in a form similar to a paint supply apparatus that is currently frequently used, that is, a form in which paint is supplied through a piping system. For this reason, the paint supply device 10 can be configured by modification such as adding a new valve or piping to the existing piping, and the initial cost in equipment costs can be reduced.
[0069]
Further, since the same number of pig groups 31 and 32 as the number of the coating guns 11 and 12 are incorporated, the coating material can be supplied to each of the coating guns 11 and 12 quickly and efficiently.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an embodiment of a paint supply device according to the present invention.
FIG. 2 is a flowchart showing the operation of the paint supply device.
FIG. 3 is a diagram provided to explain a procedure for filling an A-color paint.
FIG. 4 is a diagram provided for explanation of a procedure for filling an A-color paint.
FIG. 5 is a diagram provided to explain a procedure for transporting an A-color paint.
FIG. 6 is a diagram for explaining a setting procedure of a pig assembly.
FIG. 7 is a diagram for explaining a setting procedure of a pig assembly.
FIG. 8 is a diagram for explaining a supply procedure of a color A paint;
FIG. 9 is a diagram for explaining a supply procedure of a color A paint;
FIG. 10 is a diagram provided for explaining a pig assembly recovery procedure.
FIG. 11 is a diagram provided for describing a pig assembly recovery procedure.
FIG. 12 is a diagram provided to explain a cleaning procedure in the pig assembly.
FIG. 13 is a diagram for explaining a cleaning procedure in the pig assembly.
FIG. 14 is a diagram for describing a procedure for filling a B color paint;
[Explanation of symbols]
10. Paint supply device
11 First paint gun (painting means)
12 Second paint gun (painting means)
20 ... Supply piping
31f, 32f... Front pig (first pig on the downstream side in the transfer direction)
31r, 32r ... rear pig (second pig on the upstream side in the transfer direction)
31... First pig set (pig set composed of a pair of pigs 31f and 31r)
32: second pig set (pig set composed of a pair of pigs 32f and 32r)
43 ... third three-way valve (stopping means)
44: Fourth three-way valve (stopping means)
60: paint filling section
71: Magnetic sensor (detection means)
72 ... Control means

Claims (7)

The pig is movably incorporated into the supply pipe connected to the coating means, and the pig is pushed and transferred by a cleaning agent for cleaning the inside of the supply pipe. A paint supply device, characterized in that the paint supply device supplies the paint. A pig assembly composed of a pair of pigs is movably incorporated into a supply pipe to which the coating means is connected, and the pig assembly is pushed and transferred by a cleaning agent for cleaning the inside of the supply pipe, and a pair of pigs in the pig assembly are transferred. A paint supply device for supplying the paint filled in between to the coating means. The paint supply device according to claim 2, wherein a paint filling unit that fills paint between a pair of pigs in the pig set is provided in the supply pipe. 4. The paint supply device according to claim 2, wherein the supply pipe is configured to be able to circulate and transfer the pig assembly. 5. The method according to claim 2, wherein the first pig on the downstream side in the transport direction in the pig assembly is stopped, the second pig on the upstream side is further pushed and transported by the cleaning agent, and the paint is supplied to the coating means. Paint supply equipment. Stopping means for stopping the first pig;
Detecting means for detecting that the first pig has reached a predetermined stop position;
6. The control device according to claim 5, further comprising: control means for operating the stop means to stop the first pig when the detection means detects that the first pig has reached the stop position. A paint supply device as described in the above. 7. The supply pipe according to claim 2, wherein a plurality of coating means are connected to the supply pipe, and the pig set includes a set number equal to the number of the coating means. Paint supply device.

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