JP4235631B2 - Painting equipment - Google Patents

Description

  The present invention relates to a coating apparatus. In particular, the present invention relates to a coating apparatus that is applied to a coating robot and has a paint color changing function.

  For example, in a line for overcoating the body of an automobile, the painting robot sprays the body conveyed on the conveyor by painting. In such a painting line, painting is often performed with a different painting color for each body, and a color changing device provided in a painting robot switches to a paint of a designated color to be painted on the body.

  As a color changing device provided in a painting robot, there is known a color changing device that switches a plurality of colors of paint with a CCV (Color Change Valve) and supplies the paint gun to a painting gun. The CCV is provided with a plurality of valves, and a specified color paint is supplied to the coating gun by opening a specified valve and closing other valves. When the paint of the designated color is changed, the paint supply path from the valve to the paint gun is cleaned with a solvent and air.

  The above-mentioned coating apparatus using CCV is also called a circulation type coating apparatus, and there is a limit to the number of coating colors. In the case of small lot coating color coating, The disadvantage is that the cleaning liquid (eg thinner) needs to be discarded.

  On the other hand, a cartridge-type coating apparatus is known as a means for overcoming the above-described drawbacks of the circulation-type coating apparatus. For example, as a cartridge-type coating apparatus, a color changing apparatus for a painting robot has been invented that includes a painting robot body, a joint plate, a cylinder, a painting gun, and a paint container (see, for example, Patent Document 1). .

As another cartridge-type coating device, a rotary atomizing head type that enables the coating of various colors to be applied without discharging the paint by providing a removable cartridge for each color in the coating device. A coating apparatus has been invented (see, for example, Patent Document 2).
JP 60-122073 A JP 11-262699 A

  FIG. 20 is a schematic configuration diagram of a first embodiment of a color changing device according to Patent Document 1. In FIG. FIG. 20 of the present application corresponds to FIG. 20, in the color changing device according to Patent Document 1, the painting robot body has an arm 81. The joint plate 82 is attached to the arm 81 of the painting robot body. The cylinder 84 is attached to the proximal end side of the arm 81 at a predetermined distance from the joint plate 82 and has a piston rod 85. The piston rod 85 has a vent hole at least at the tip, and has a length that allows the vent hole to be connected to the inflow side of the joint plate 82 at the maximum extension.

  In FIG. 20, the coating gun 89 is connected to the outflow side of the joint plate 82 and is provided at the tip of the arm 81. The paint container 811 has an opening connected to the inflow side of the joint plate 82 on one end side and an opening connected to the vent hole of the piston rod 85 on the other end side. The paint container 811 is detachably provided between the joint plate 82 and the cylinder 84. The paint container 811 discharges the paint toward the paint gun 89 by compressed air.

  The color change device according to Patent Document 1 has the following effects. (1) The painting robot main body is configured to perform the painting operation while sequentially changing the colors by exchanging the respective paint containers according to the color to be painted, so that the color changing operation can be performed in an extremely short time. (2) The paint supply hose between the paint gun and paint container can be significantly shortened or eliminated, saving paint and cleaning thinner and cleaning time. (3) By simply extending the piston rod with a compressed air hole for painting and connecting it to the paint supply hose, air and thinner can be saved, and the paint remaining in the paint gun and paint supply hose can be cleaned very easily. be able to. (4) When painting with the same shape of an object to be continuously conveyed by a conveyor line, for example, a car body while changing colors one after another, the paint container should be used up for painting one body. What is necessary is just to fill an amount of paint, and waste of paint at the time of color change can be further reduced.

  FIG. 21 is an enlarged longitudinal sectional view of a rotary atomizing head type coating apparatus according to Patent Document 2. FIG. 21 of the present application corresponds to FIG. In FIG. 21, a housing 922 has a structure in which cartridges 935 for respective colors are provided in a replaceable manner. Further, the cartridge 935 is provided with a paint valve 946 for communicating and blocking the paint supply path 939A in the feed tube. The housing 922 is provided with a thinner valve 954 for communicating and blocking the housing-side thinner passage 948. Thereby, it is possible to cope with a color change operation of a large number of colors with one coating apparatus 921. Also, when spraying or stopping the paint, the paint valve 946 and the thinner valve 954 are opened and closed by the paint spray command and stop command, so that the paint can be sprayed and stopped immediately after this command. Yes.

  In FIG. 21, the housing 922 includes a neck portion 923 that is detachably attached to the arm tip of the painting robot, and a head portion 924 that is integrally formed at the tip of the neck portion 923. A cartridge 935 is attached to the rear part of the head part 924 in a replaceable manner, and a coating machine 928 is attached to the front part of the head part 924. The painting machine 928 includes an air motor 929, a rotary atomizing head 930 that is rotated by the air motor 929, and a shaping air ring 931.

  The color change device according to Patent Document 1 says that if the paint container is filled with an amount of paint that can be used for painting one body, the waste of paint at the time of color change can be reduced. The remaining paint is washed and discarded. If the remaining paint supplied from the paint container can be returned to the paint container and collected, waste of paint at the time of color change can be further reduced.

  The rotary atomizing head-type coating apparatus according to Patent Document 2 is a so-called bell-type electrostatic coating machine, and a housing 922 forming a main body is configured by a neck portion 923, a cartridge 935, and a coating machine 928 in a substantially T shape. Has been. Although this T-shaped coating machine is relatively large and suitable for coating the outer plate of the body, there is a problem that the cartridge 935 obstructs the inner plate coating through the door. Therefore, instead of the T-shaped coating machine, a rotary atomizing head type coating apparatus including a substantially L-shaped coating machine having a rotary atomizing head (bell cup) at the tip has been adopted.

  For example, in the rotary atomizing head type coating apparatus provided with the above-mentioned substantially L-shaped coating machine, a paint container is detachably provided in the arm of a painting robot that is an extension of the neck portion, and this paint container is changed. Color change painting from a painting machine is possible. However, the rotary atomizing head-type coating apparatus provided with the substantially L-shaped coating machine has a problem of the remaining paint as in the color changing apparatus according to Patent Document 1. In a rotary atomizing head type coating apparatus equipped with a substantially L-shaped coating machine, if the remaining paint supplied from the paint container can be returned to the paint container and collected, waste of paint during color change can be reduced.

  In addition, the color changing device according to Patent Literature 1 and the rotary atomizing head type painting device according to Patent Literature 2 have to remove the paint container or cartridge from the painting robot every time cleaning is performed for color change. If the remaining paint can be washed from the paint supply port to the paint injection port without removing the paint container or cartridge from the coating robot each time the color is changed, the process time can be shortened. And these may be the subject of the present invention.

  In view of such problems, the present invention is a coating apparatus that is applied to a coating robot and has a paint color changing function. The first object of the present invention is to apply paint remaining from a paint container to the paint container. An object of the present invention is to provide a coating apparatus that can be recovered by refluxing. The second object is to provide a coating apparatus capable of cleaning the remaining paint from the paint supply port to the paint injection port without removing the paint container from the coating robot every time the color is changed.

  In order to satisfy the above-mentioned object, the present inventor has a structure in which a pig that can reciprocate in the paint flow path from the inside of the paint container or the outside of the paint container to the vicinity of the end of the paint injection port is provided. Was invented.

  (1) One end has a spray port for spraying paint, and the other end is detachably installed in the coating robot arm connected to the tip of the arm of the painting robot, and an individual paint for each color. A first paint container for containing the paint, and supplying an individual paint for each color from the first paint container to the spray port, wherein the first paint container contains the paint. A movable valve that isolates the interior of the storage chamber and the solvent storage chamber capable of storing the solvent; and a first opening through which the movable valve moves and the paint flows out of the paint storage chamber when the solvent is supplied to the solvent storage chamber. The other end is connected to the first opening, the other end is connected to the spray channel, the fluid is supplied to one end, the other end is the fluid channel to the spray port, and the A communication path that communicates the other end of the paint channel with the other end of the fluid channel A first pig that is sealed in the paint flow path and is movably accommodated in the paint flow path, and a directional control valve that has a head that is movable by sealing the other end of the fluid flow path, When the head is moved to one end side of the fluid flow path beyond the communication path, the first pig moves to the other end of the paint flow path so that the paint passes through the communication path. When the head is moved to the other end side of the fluid flow path over the communication path, the fluid is connected to the other end of the paint flow path via the communication path. Is supplied to the first paint container from the first paint container, and the remaining paint is returned to the first paint container and collected.

  The coating apparatus according to the invention of (1) includes a coating machine and a first paint container. One end of the coating machine has a spray port for spraying paint, and the other end of the coating machine is connected to the tip of the arm of the coating robot. The first paint container is detachably installed in the arm of the painting robot and contains individual paints for each color. Then, an individual paint for each color is supplied from the first paint container to the spray port.

  For example, as will be described later, the coating machine may be a bell-type coating machine that atomizes the paint, or may be a coating machine that uses an air spray gun that sprays the paint. Has a spray port for spraying. The painting robot preferably has a teaching function, and can be freely repainted when painting is automated.

  The articulation robot is generally used in many articulated forms, and the other end of the painting machine is connected to the arm tip of the painting robot. Here, that the painting machine is connected to the painting robot means that the painting machine is detachably or replaceably connected to the painting robot. This means that the source or paint and solvent are connected to the actuators and various flow paths provided in the coating machine. A painting machine may be integrated with the tip of the arm of the painting robot.

  The coating apparatus according to the invention of (1) includes a conveyor for placing a plurality of first paint containers containing individual paints for each color, and a predetermined first paint container on the conveyor in an arm of a painting robot. Or a transfer robot for transferring the first paint container in the arm of the coating robot onto the conveyor, and the replacement work of the first paint container is automated. For example, the transfer robot has a swingable and extendable arm, and the tip of the arm grips the first paint container at a predetermined position on the conveyor, and moves to a predetermined position within the arm of the painting robot. It is preferable to provide a positioning member in the arm of the painting robot so that the first paint container is installed at a predetermined position in the arm. The first paint container is formed in a substantially cylindrical shape, for example, and is installed so that the axial center of the first paint container is parallel to the longitudinal direction of the arm.

  In the coating apparatus according to the invention of (1), the first paint container includes a movable valve and a first opening. The movable valve isolates the interior of the first paint container into a paint storage chamber for storing the paint and a solvent storage chamber capable of storing the solvent. When the solvent is supplied to the solvent storage chamber, the movable valve moves and the paint flows out from the paint storage chamber.

  For example, the movable valve may be a piston that is slidably fitted in the axial direction of the first paint container so as to seal the inner wall of the first paint container, and the movable valve includes the paint storage chamber and the solvent storage chamber. Is isolated. The first paint container may be a hollow sealed container, and the paint and the solvent are separated from each other by a movable valve. In the initial state, the first paint container occupies most of the paint. And if a solvent is supplied to a solvent storage chamber, a movable valve will move and a coating material will flow out through a 1st opening from a coating material storage chamber.

  For example, the first opening may be provided with a male joint that constitutes a quick joint, while the one end of the paint passage that will be described later may be provided with a female joint that constitutes a quick joint. By connecting the female joint, the paint in the paint containing chamber can be supplied to the paint flow path. Alternatively, the residual paint in the paint flow path can be collected in the paint storage chamber.

  For example, a piston may be disposed in the arm at a position facing the first paint container, and a female joint that constitutes a quick joint may be provided at the tip of the hollow piston rod, while contradicting the first opening. A male joint constituting a quick joint may be provided at the end of the solvent storage chamber at the position, and the male joint and the female joint are connected by extending a hollow piston rod. By supplying a solvent (for example, thinner) from the base end side of the hollow piston rod, the solvent can be supplied to the solvent storage chamber. If the base end side of the hollow piston rod is released, the movable valve can be moved to the solvent containing chamber side so that the remaining paint in the paint channel can be collected in the paint containing chamber.

  The coating apparatus according to the invention of (1) includes a paint channel, a fluid channel, a communication channel, a first pig, and a direction control valve. One end of the paint channel is connected to the first opening. The other end of the paint channel reaches the vicinity of the spray port. A fluid is supplied to one end of the fluid flow path. The other end of the fluid flow path reaches the spray port. The communication path communicates the other end side of the paint channel and the other end side of the fluid channel. The first pig is housed in such a manner that the inside of the paint channel is sealed and the inside of the paint channel is movable. The direction control valve has a head that can move with the other end of the fluid flow path sealed.

  The paint flow path preferably draws a smooth path from one end to the other end so that the first pig can reciprocate inside the paint flow path. It is a straight path parallel to the axis of the machine head. On the other hand, a certain distance from the other end of the fluid flow path to the one end side is a straight path that is close to and parallel to the straight path of the paint flow path. The head of the direction control valve can move in the straight path of the fluid flow path. The communication path communicates so that the straight path of the paint flow path and the straight path of the fluid flow path are orthogonal to each other. It is preferable that the inner diameter of the connecting path is smaller than the inner diameter of the paint channel so that the first pig does not move from the straight path of the paint channel to the connecting path.

  The direction control valve may be a single-acting needle valve, for example, and has a head at the tip of a needle-like piston cylinder. The needle valve main body is built in the head of the coating machine, and by supplying a fluid (for example, air) to the needle valve main body, the needle valve main body can be moved in the direction of retracting the head, and the air supply to the needle valve main body is stopped. Thus, the head can be returned. Another single-acting needle valve that circulates or shuts off fluid (for example, air) on the other end side of the fluid flow path may be provided in the head of the coating machine.

  In the coating apparatus according to the invention of (1), when the head moves to the one end side of the fluid flow path beyond the communication path, the first pig moves to the other end of the paint flow path to connect the paint. It is supplied to the spraying port through a passage. On the other hand, when the head moves to the other end side of the fluid flow path over the communication path, the fluid is supplied to the other end of the paint flow path via the communication path, so that the first pig is The remaining paint supplied from the paint container is returned to the first paint container and collected.

  The coating apparatus according to the invention of (1) supplies the solvent to the solvent storage chamber of the first paint container installed in the arm of the coating robot when coating the object to be coated. And a movable valve moves and a coating material flows out into a coating material flow path through a 1st opening from a coating material storage chamber. At this time, the head moves to one end side of the fluid flow path beyond the communication path, and the paint is sprayed from the spray port through the communication path. When the predetermined coating is completed, the head moves over the communication path to the other end of the fluid flow path, and fluid is supplied from one end of the fluid flow path, so that the fluid flows through the connection path. The first pig moves in the paint flow path, and the paint remaining in the paint flow path can be returned to the first paint container and collected.

  In this way, the coating apparatus according to the invention of (1) returns to the paint container and collects it without discarding the remaining paint supplied from the paint container, so that waste of paint at the time of color change is reduced. it can.

  (2) One end has a spraying port for spraying paint, and the other end is detachably installed in the coating robot arm connected to the tip of the arm of the painting robot, and an individual paint for each color. A second paint container for containing the paint, and supplying an individual paint for each color from the second paint container to the spraying port, wherein the second paint container contains the paint. A movable valve that isolates the interior of the storage chamber and the solvent storage chamber that can store the solvent; and a second opening through which the movable valve moves and the paint flows out of the paint storage chamber when the solvent is supplied to the solvent storage chamber. A pig storage chamber having a first port and a second port through which a solvent can flow in and out, and a second pig between the first port and the second port, and is connected to the second opening; When solvent is supplied from one port, the second opening A pig storage chamber in which the second pig is ejected and returned to the second opening by a fluid supplied toward the second opening, and one end is connected to the second opening and the other is connected to the second opening. A fluid passage that reaches the vicinity of the spray port, a fluid is supplied to one end, a fluid passage that reaches the spray port, the other end communicates with the other end of the paint passage and the other end of the fluid passage. And a directional control valve having a head that can move by sealing the other end of the fluid flow path, and the head moves over the communication path to one end of the fluid flow path. When the solvent is supplied from the first port, the second pig reaches from the one end side of the paint flow path to the other end side, and the paint passes from the one end side of the paint flow path to the communication path and the fluid. The coating apparatus discharged | emitted from the said spraying opening through the other end side of a flow path.

  The coating apparatus according to the invention of (2) includes a coating machine and a second paint container. One end of the coating machine has a spray port for spraying paint, and the other end of the coating machine is connected to the tip of the arm of the coating robot. The second paint container is detachably installed in the arm of the painting robot, and contains individual paint for each color. Then, an individual paint for each color is supplied from the second paint container to the spray port.

  The coating apparatus according to the invention of (2) includes a conveyor for placing a plurality of second paint containers containing individual paints for each color, and a predetermined second paint container on the conveyor in the arm of the painting robot. Or a transfer robot for transferring the second paint container in the arm of the coating robot onto the conveyor, and the replacement work of the second paint container is automated. For example, the transfer robot has a swingable and extendable arm, and the tip of the arm grips the second paint container at a predetermined position on the conveyor, and moves to a predetermined position within the arm of the painting robot. It is preferable to provide a positioning member in the arm of the painting robot so that the second paint container is installed at a predetermined position in the arm. The second paint container is formed in a substantially cylindrical shape, for example, and is installed so that the axial center of the second paint container is parallel to the longitudinal direction of the arm.

  In the coating apparatus according to the invention of (2), the second paint container includes a movable valve, a second opening, and a pig storage chamber. The movable valve isolates the interior of the second paint container into a paint storage chamber for storing the paint and a solvent storage chamber capable of storing the solvent. In the second opening, when the solvent is supplied to the solvent storage chamber, the movable valve moves and the paint flows out from the paint storage chamber. The pig storage chamber has a first port and a second port through which solvent can flow in and out, and a second pig is stored between the first port and the second port. Further, the pig storage chamber is connected to the second opening, and when the solvent is supplied from the first port, the second pig is ejected from the second opening and the second pig is caused by the fluid supplied toward the second opening. Returned.

  For example, the movable valve may be a piston that is slidably fitted in the axial direction of the second paint container so as to seal the inner wall of the second paint container, and the movable valve includes the paint storage chamber and the solvent storage chamber. Is isolated. The second paint container may be a hollow sealed container, in which the paint and the solvent are separated from each other by a movable valve. In the initial state, the paint occupies most of the second paint container. And if a solvent is supplied to a solvent storage chamber, a movable valve will move and a coating material will flow out through a 2nd opening from a coating material storage chamber.

  For example, the second opening may be provided with a male joint that constitutes a quick joint, while the one end of the paint passage that will be described later may be provided with a female joint that constitutes a quick joint. By connecting the female joint, the paint in the paint containing chamber can be supplied to the paint flow path. For example, a piston may be disposed in the arm at a position facing the second paint container, and a female joint that constitutes a quick joint may be provided at the tip of the hollow piston rod, while contradicting the first opening. A male joint constituting a quick joint may be provided at the end of the solvent storage chamber at the position, and the male joint and the female joint are connected by extending a hollow piston rod. By supplying a solvent (for example, thinner) from the base end side of the hollow piston rod, the solvent can be supplied to the solvent storage chamber.

  For example, the pig storage chamber is composed of a cylinder in which the paint storage chamber side of the second paint container is partially divided, and the first port and the second port communicate with the cylinder. The first port and the second port may be provided with a male joint constituting a quick joint, and a female joint constituting a quick joint provided at the end of a flow path capable of supplying or discharging a solvent is connected to the male joint. By connecting, the solvent can flow into and out of the first port and the second port.

  In the initial state, the second pig is accommodated in the pig accommodating chamber between the first port and the second port. When the solvent is supplied from the first port, the second pig is pushed out by the solvent and moves to the second port side, and the second pig is injected from the second opening. For example, it is preferable to provide a check valve at the end of the connecting pipe of the paint storage chamber connected to the pig storage chamber so that the solvent in the pig storage chamber does not flow into the paint storage chamber. On the other hand, the second pig is returned by the fluid (for example, air) supplied toward the second opening. Thus, the pig accommodation chamber functions like a double-acting piston cylinder, and the second pig functions as a piston with a variable stroke.

  The coating apparatus according to the invention of (2) includes a paint channel, a fluid channel, a communication channel, and a direction control valve. One end of the paint channel is connected to the second opening. The other end of the paint channel reaches the vicinity of the spray port. A fluid is supplied to one end of the fluid flow path. The other end of the fluid flow path reaches the spray port. The communication path communicates the other end side of the paint channel and the other end side of the fluid channel. The direction control valve has a head that can move with the other end of the fluid flow path sealed.

  For example, the second pig can move in the paint channel by sealing the inside of the paint channel. The paint flow path preferably draws a smooth path from one end to the other end so that the second pig can reciprocate inside the paint flow path. It is a straight path parallel to the axis of the machine head. On the other hand, a certain distance from the other end of the fluid flow path to the one end side is a straight path that is close to and parallel to the straight path of the paint flow path. The head of the direction control valve can move in the straight path of the fluid flow path. The communication path communicates so that the straight path of the paint flow path and the straight path of the fluid flow path are orthogonal to each other. The inner diameter of the connecting path is preferably smaller than the inner diameter of the paint channel so that the second pig does not move from the straight path of the paint channel to the connecting path.

  The direction control valve may be a single-acting needle valve, for example, and has a head at the tip of a needle-like piston cylinder. The needle valve body is built in the head of the paint machine. By supplying air to the needle valve body, the needle valve body can be moved in the direction of retracting the head. By stopping the air supply to the needle valve body, the head is restored. can do. Another single-acting needle valve that circulates or shuts off fluid (for example, air) on the other end side of the fluid flow path may be provided in the head of the coating machine.

  In the coating apparatus according to the invention of (2), when the solvent is supplied from the first port while the head is moving to the one end side of the fluid flow path over the communication path, the second pig becomes one end of the paint flow path. From the side to the other end side, the paint is discharged from the spray port from one end side of the paint channel through the communication path and the other end side of the fluid channel.

  Thus, in the coating apparatus according to the invention of (2), since the second pig pushes the paint in the paint flow path to the vicinity of the spray port, the paint discharged from the second paint container can be almost used up. Further, the solvent for extruding the second pig functions as a cleaning liquid for the paint channel, and for example, thinner is used.

  (3) When the head moves to the other end side of the fluid flow path beyond the communication path, the fluid is supplied to one end side of the paint flow path through the communication path. When the second pig returns to the pig storage chamber, the head is moved to one end side of the fluid flow path over the communication path, and the solvent is supplied from the second port, the solvent flows into the paint flow path. The coating apparatus according to (2), wherein the coating apparatus is sprayed from the spray port through a road and a communication path.

  In the coating apparatus according to the invention of (3), when the head moves to the other end side of the fluid flow path beyond the communication path, the fluid is supplied to one end side of the paint flow path through the connection path. As a result, the second pig returns to the pig storage chamber. When the head is moved to one end side of the fluid flow path over the communication path and the solvent is supplied from the second port, the solvent is jetted from the spray supply port through the paint flow path and the communication path.

  For example, the fluid may be air and the solvent may be thinner. The air functions as an extruded fluid that returns the second pig to the pig storage chamber. After the second pig returns to the pig storage chamber, this air is discharged to the second port. When the head is moved to one end side of the fluid flow path over the communication path, the air is stopped to the communication path, and the communication path and the spray port can be circulated. When the thinner is supplied from the second port, the thinner is sprayed from the spray port through the paint channel and the communication channel. That is, cleaning is performed from the paint supply port to the spray port through the paint channel and the communication channel. After cleaning for a predetermined time, the supply of thinner from the second port can be stopped and replaced with the next second paint container.

  In this way, the coating apparatus according to the invention of (2), as in the prior art, can be applied with the paint container placed on the painting robot without removing the paint container from the painting robot every time cleaning is performed for color change. Since the remaining paint can be washed from the supply port to the paint injection port, the process time can be shortened.

  (4) The coating according to (1), wherein a fluid passage that pushes the first pig positioned at the end of the other end of the paint channel to one end of the paint channel is provided at the end of the paint channel. apparatus.

  (5) A fluid passage that pushes the second pig positioned at the other end of the paint channel to one end of the paint channel is provided at the end of the paint channel (2) or (3 ) The coating equipment described.

  (6) The coating machine includes a bell cup that rotates around the spray port and a shaping air ring that blows air on the outer periphery of the bell cup, and is a bell type coating machine that atomizes paint (1 ) To (5).

  (7) The coating apparatus according to (6), wherein the coating machine is a bell-type coating machine that includes a bell cup at a tip and is formed of a cylindrical housing that is bent at an obtuse angle.

  The coating apparatus according to the first embodiment of the present invention is able to reduce the waste of paint when changing colors because the paint supplied from the paint container is returned to the paint container without being discarded. . In addition, the coating apparatus according to the second embodiment of the present invention can use up most of the paint discharged from the coating container, and the painting robot can be used without changing the coating container from the painting robot every time cleaning is performed for color change. Since the remaining paint can be washed from the paint supply port to the paint injection port with the paint container placed on the process container, the process time can be shortened.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing a first embodiment of a coating apparatus according to the present invention. FIG. 2 is a schematic configuration diagram of the coating apparatus according to the first embodiment. FIG. 2 is a state change diagram of FIG. FIG. 3 is a schematic configuration diagram of the coating apparatus according to the first embodiment. FIG. 3 is a state change diagram of FIG. FIG. 4 is a schematic configuration diagram of the coating apparatus according to the first embodiment. FIG. 4 is a state change diagram of FIG.

  FIG. 5 is an enlarged cross-sectional view of a main part of the coating apparatus according to the first embodiment. FIG. 5 corresponds to the state diagram of FIG. FIG. 6 is an enlarged cross-sectional view of a main part of the coating apparatus according to the first embodiment. FIG. 6 corresponds to the state diagram of FIG. FIG. 7 is an enlarged cross-sectional view of a main part of the coating apparatus according to the first embodiment. FIG. 7 corresponds to the state diagram of FIG. FIG. 8 is an enlarged cross-sectional view of a main part of the coating apparatus according to the first embodiment. FIG. 8 corresponds to the state diagram of FIG.

  FIG. 9 is a schematic configuration diagram showing a second embodiment of the coating apparatus according to the present invention. FIG. 10 is a schematic configuration diagram of the coating apparatus according to the second embodiment. FIG. 10 is a state change diagram of FIG. FIG. 11 is a schematic configuration diagram of the coating apparatus according to the second embodiment. FIG. 11 is a state change diagram of FIG. FIG. 12 is a schematic configuration diagram of the coating apparatus according to the second embodiment. FIG. 12 is a state change diagram of FIG. FIG. 13 is a schematic configuration diagram of the coating apparatus according to the second embodiment. FIG. 13 is a state change diagram of FIG. FIG. 14 is a schematic configuration diagram of the coating apparatus according to the second embodiment. FIG. 14 is a state change diagram of FIG.

  FIG. 15 is an enlarged cross-sectional view of a main part of the coating apparatus according to the second embodiment. FIG. 15 corresponds to the state diagram of FIG. FIG. 16 is an enlarged cross-sectional view of a main part of the coating apparatus according to the second embodiment. FIG. 16 corresponds to the state diagram of FIG. FIG. 17 is an enlarged cross-sectional view of a main part of the coating apparatus according to the second embodiment. FIG. 17 corresponds to the state diagram of FIG. FIG. 18 is an enlarged cross-sectional view of a main part of the coating apparatus according to the second embodiment. FIG. 18 corresponds to the state diagram of FIG. FIG. 19 is an enlarged cross-sectional view of a main part of the coating apparatus according to the second embodiment. FIG. 19 corresponds to the state diagram of FIG.

  Initially, the structure of 1st Embodiment of the coating device by this invention is demonstrated. In FIG. 1, a coating apparatus 100 includes a coating machine 1 and a first coating container B1. One end of the coating machine 1 has a spray port 1a for spraying paint (see FIG. 5). The other end of the painting machine 1 is connected to the tip of the arm A of the painting robot. In FIG. 5, the coating machine 1 is a bell-type coating machine that atomizes paint, and the head 1h is provided with a bell cup 1b that rotates about a spray port 1a. Further, the head 1h is provided with a shaping air ring 1c for blowing air to the outer periphery of the bell cup 1b.

  In FIG. 5, the coating machine 1 is an electrostatic coating machine, and a shaping air ring 1c is attached to one end of an electrically insulating coating machine housing 1d. The other end of the coating machine housing 1d is detachably attached to one end of an electrically insulating control valve 1e. The control valve 1e includes a bearing unit 1f, and the bearing unit 1f is held in the control valve 1e by a cap nut 1g. The other end of the control valve 1e is attached to one end of the bent housing 1j. The other end of the bent housing 1j is connected to the tip end of the arm A of the painting robot via a connection unit, a control valve unit and a connection flange (not shown).

  It can also be said that the coating machine 1 is a bell type coating machine having a bell cup 1b at the tip and formed of a cylindrical housing bent at an obtuse angle. Here, the painting machine 1 is detachably or replaceably connected to the tip of the arm A of the painting robot, and a power source, an air source, and a solvent source provided in the painting robot are actuators (for example, valves) provided in the painting machine. ) And various flow paths described later.

  In FIG. 1, for example, a transport robot (not shown) has an arm that can turn and extend, and the tip of the arm grips the first paint container B1 at a predetermined position on a conveyor (not shown), and the arm of the painting robot. Move to a predetermined position in A. It is preferable to provide a positioning member in the arm A of the painting robot so that the first paint container B1 is installed at a predetermined position in the arm A. The first paint container B1 is formed in a substantially cylindrical shape, and is installed so that the axial center of the first paint container B1 is parallel to the longitudinal direction of the arm A.

  In FIG. 1, the first paint container B <b> 1 includes a movable valve 20 and a first opening 21. The movable valve 20 isolates the interior of the first paint container B1 into a paint containing chamber 2a for containing paint and a solvent containing chamber 2b capable of containing a solvent. When the solvent is supplied to the first opening 21 to the solvent storage chamber 2b, the movable valve 20 moves and the paint flows out from the paint storage chamber 2a.

  In FIG. 1, the movable valve 20 may be a piston that is slidably fitted in the axial direction of the first paint container B1 so as to seal the inner wall of the first paint container B1. The storage chamber 2a and the solvent storage chamber 2b are isolated. The first paint container B1 is a hollow sealed container, and contains paint and solvent separated by a movable valve 20 and stored. In the initial state, the paint occupies most of the first paint container B1. When the solvent is supplied to the solvent storage chamber 2b, the movable valve 20 moves and the paint flows out from the paint storage chamber 2a through the first opening 21.

  In FIG. 1, the first opening 21 may be provided with a male joint (not shown) constituting a quick joint, while one end of the paint channel 11 is provided with a female joint (not shown) constituting a quick joint. And the male joint and the female joint are connected so that the paint in the paint containing chamber 2a can be supplied to the paint flow path 11. Alternatively, the residual paint in the paint flow path 11 can be collected in the paint storage chamber 2a.

  In FIG. 1, a piston (not shown) is disposed in the arm A at a position facing the first paint container B1, and a female joint (not shown) constituting a quick joint is formed at the tip of the hollow piston rod PR. Provided. On the other hand, a male joint (not shown) that constitutes a quick joint is provided at the pipe end of the solvent storage chamber 2b, which is at a position opposite to the first opening 21, and by extending a hollow piston rod PR, The male joint and this female joint are connected. By supplying a solvent (for example, thinner) from the base end side (in the direction of arrow S in the figure) of the hollow piston rod PR, the solvent can be supplied to the solvent storage chamber 2b. If the base end side of the hollow piston rod PR is released, the movable valve 20 can be moved to the solvent containing chamber 2b side so that the remaining paint in the paint channel 11 can be collected in the paint containing chamber 2a.

  1 and 5, the coating apparatus 100 includes a paint flow path 11, a fluid flow path 12, a communication path 13, a first pig 1p, and a direction control valve 1v. One end of the paint channel 11 is connected to the first opening 21. The other end of the paint channel 11 reaches the vicinity of the spray port 1a. A fluid is supplied to one end of the fluid flow path 12. The other end of the fluid flow path 12 reaches the spray port 1a. The communication path 13 communicates the other end side of the paint channel 11 and the other end side of the fluid channel 12. The first pig 1p is housed in such a manner that the inside of the paint channel 11 is sealed and the inside of the paint channel 11 is movable. The direction control valve 1v has a head 11v that can move with the other end of the fluid flow path 12 sealed.

  1 and 5, a smooth path is drawn from one end to the other end of the paint channel 11 so that the first pig 1p can reciprocate therein. A certain distance from the other end of the paint channel 11 toward the one end is a straight path parallel to the axial center of the head 1 h of the coating machine 1. In addition, a fluid passage 14 for pushing the first pig 1p positioned at the other end of the paint channel 11 to one end is provided at the end of the paint channel 11. On the other hand, a certain distance from the other end of the fluid flow path 12 to the one end side is a straight path that is close to and parallel to the straight path of the paint flow path 11. The head 11v of the direction control valve 1v can move in the straight path of the fluid flow path 12. The communication path 13 communicates the straight path of the paint flow path 11 and the straight path of the fluid flow path 12 so as to be orthogonal to each other. For example, the inner diameter of the paint flow path 11 in which the first pig 1p reciprocates is about 6 mm, and the inner diameter of the connection path 13 is prevented so that the first pig 1p does not move from the straight path of the paint flow path 11 to the connection path 13. Is formed smaller than the inner diameter of the paint channel 11.

  In FIG. 5, a directional control valve 1v is a single-acting needle valve, and has a head 11v at the tip of a needle-like piston cylinder. The needle valve main body 12v is built in the head 1h of the coating machine 1, and can move in the direction in which the head 11v is retracted by supplying a fluid (for example, air) to the needle valve main body 12v. By stopping the supply of air to the needle valve body 12v, the head 11v can be returned. Another single-acting needle valve 1 w that circulates or shuts off fluid (for example, air) on the other end side of the fluid flow path 12 is built in the head 1 h of the coating machine 1.

  Next, the operation of the coating apparatus 100 according to the first embodiment will be described.

  In FIG. 1, when the first paint container B1 is installed at a predetermined position in the arm A, a solvent (for example, thinner) is supplied from the hollow piston rod PR. And a solvent is supplied in the solvent storage chamber 2b, and the movable valve 20 moves to the paint storage chamber 2a side, whereby the paint in the paint storage chamber 2a can be supplied to the paint flow path 11. In the initial state, the first pig 1p is located at the end of one end side (the first opening 21 side) of the paint flow path 11. Further, the head 11v moves to one end side of the fluid flow path 12 beyond the communication path 13 (see FIG. 5).

  In FIG. 2, when the solvent is further supplied from the hollow piston rod PR, the first pig 1p is moved to the other end side of the paint flow path 11 by the paint sent out from the paint storage chamber 2a. And the 1st pig 1p contacts the terminal of the other end side over the connecting path 13, and stops (refer FIG. 6).

  In FIG. 3, when the solvent is further supplied from the hollow piston rod PR, the paint delivered from the paint storage chamber 2a is sprayed from the spray port 1a via the communication path 13 (see FIG. 7). At this time, the head 11v moves to one end side of the fluid flow path 12 of the paint flow path 11 beyond the communication path 13 (see FIG. 7).

  In FIG. 4, when the supply of the solvent to the solvent storage chamber 2b is stopped, the paint from the spray port 1a is not sprayed, and the predetermined painting operation is completed. Then, the proximal end side of the hollow piston rod PR is released, and the movable valve 20 can be moved to the solvent storage chamber 2b side. The solvent is returned in the direction of arrow R in the figure. Next, the head 11v moves to the other end side of the fluid flow path 12 over the communication path 13 (see FIG. 8).

  In FIG. 8, fluid (for example, air) is supplied from one end side of the fluid flow path 12, and the paint remaining in the paint flow path 11 is pushed back to the paint containing chamber 2 a side through the communication path 13. Next, at the timing when the paint is discharged from the communication path 13, a fluid (for example, air) is supplied from the fluid passage 14, and the first pig 1 p positioned at the other end of the paint flow path 11 passes through the paint flow. It pushes out to the one end side of the path | route 11. A fluid (for example, air) is further supplied from one end side of the fluid flow path 12, and the first pig 1 p moves in the paint flow path 11. The first pig 1p moves to the end on one end side of the paint flow path 11, returns to the initial state, and the paint remaining in the paint flow path 11 can be returned to the first paint container B1 and collected (see FIG. 1). And it can replace with the following 1st coating material container B1.

  As described above, the coating apparatus according to the first embodiment of the present invention returns to the paint container and collects the remaining paint supplied from the paint container without discarding it. Waste can be reduced.

  Next, the structure of 2nd Embodiment of the coating device by this invention is demonstrated. In the description of the second embodiment, the description of the same reference numerals used in the first embodiment may be omitted. In FIG. 9, the coating apparatus 200 includes a coating machine 1 and a second paint container B2. One end of the coating machine 1 has a spray port 1a for spraying paint (see FIG. 15). The other end of the painting machine 1 is connected to the tip of the arm A of the painting robot. In FIG. 15, a coating machine 1 is a bell type coating machine for atomizing paint, and a head 1h is provided with a bell cup 1b that rotates around a spraying port 1a. Further, the head 1h is provided with a shaping air ring 1c for blowing air to the outer periphery of the bell cup 1b.

  In FIG. 9, for example, a transfer robot (not shown) has an arm that can be turned and extended, and the tip of the arm grips the second paint container B <b> 2 at a predetermined position on a conveyor (not shown) to Move to a predetermined position in A. It is preferable to provide a positioning member in the arm A of the painting robot so that the second paint container B2 is installed at a predetermined position in the arm A. The second paint container B2 is formed in a substantially cylindrical shape, and is installed so that the axial center of the second paint container B2 is parallel to the longitudinal direction of the arm A.

  9, the second paint container B2 includes a movable valve 30, a second opening 31, and a pig storage chamber 3c. The movable valve 30 isolates the interior of the second paint container B2 from the paint storage chamber 3a for storing the paint and the solvent storage chamber 3b for storing the solvent. When the solvent is supplied to the second opening 31 to the solvent storage chamber 3b, the movable valve 30 moves and the paint flows out from the paint storage chamber 3a. The pig storage chamber 3c has a first port p1 and a second port p2 through which solvent can flow in and out. A second pig 2p is accommodated between the first port p1 and the second port p2. The pig storage chamber 3c is connected to the second opening 31, and when the solvent is supplied from the first port p1, the second pig 2p is ejected from the second opening 31 and supplied toward the second opening 31. The second pig 2p is returned by the fluid.

  In FIG. 9, the movable valve 30 may be a piston that is slidably fitted in the axial direction of the second paint container B2 so as to seal the inner wall of the second paint container B2. The storage chamber 3a is isolated from the solvent storage chamber 3b. The second paint container B2 is a hollow sealed container in which paint and solvent are separated by a movable valve 30 and stored. In the initial state, the paint occupies most of the second paint container B2. When the solvent is supplied to the solvent storage chamber 3b, the movable valve 30 moves and the paint flows out from the paint storage chamber 3a through the second opening 31.

  In FIG. 9, the second opening 31 may be provided with a male joint (not shown) constituting a quick joint, while one end of the paint channel 11 is provided with a female joint (not shown) constituting the quick joint. And the male joint and the female joint are connected so that the paint in the paint containing chamber 3a can be supplied to the paint flow path 11.

  In FIG. 9, a piston (not shown) is disposed in the arm A at a position facing the second paint container B2, and a female joint (not shown) constituting a quick joint is formed at the tip of the hollow piston rod PR. Provided. On the other hand, a male joint (not shown) constituting a quick joint is provided at the pipe end of the solvent storage chamber 3b, which is at a position opposite to the second opening 31, and this is achieved by extending the hollow piston rod PR. The male joint and this female joint are connected. By supplying a solvent (for example, thinner) from the base end side (in the direction of arrow S in the drawing) of the hollow piston rod PR, the solvent can be supplied to the solvent storage chamber 3b.

  In FIG. 9, the pig storage chamber 3c is constituted by a cylinder in which the paint storage chamber 3a side of the second paint container B2 is partially divided, and the first port p1 and the second port p2 communicate with this cylinder. The first port p1 and the second port p2 may be provided with a male joint constituting a quick joint, and a female joint constituting a quick joint provided at the end of a flow path capable of supplying or discharging a solvent. By connecting with the joint, the solvent can flow into and out of the first port p1 and the second port p2.

  In the initial state, the second pig 2p is accommodated in the pig accommodating chamber 3c between the first port p1 and the second port p2 (see FIG. 9). When the solvent is supplied from the first port p1, the second pig 2p is pushed out by the solvent and moves to the second port p2 side, and the second pig 2p is injected from the second opening 31. A check valve (not shown) is provided at the connecting pipe end of the paint containing chamber 3a connected to the pig containing chamber 3c so that the solvent in the pig containing chamber 3c does not flow into the paint containing chamber 3a. On the other hand, the second pig 2p is returned by the fluid (for example, air) supplied toward the second opening 31. Thus, the pig accommodating chamber 3c functions as a double-acting piston cylinder, and the second pig 2p functions as a piston with a variable stroke.

  In FIG. 9 and FIG. 15, the second pig 2 p is capable of moving in the paint flow path 11 by sealing the paint flow path 11. A smooth path is drawn from one end to the other end of the paint channel 11 so that the second pig 2p can reciprocate therein. A certain distance from the other end of the paint channel 11 toward the one end is a straight path parallel to the axial center of the head 1 h of the coating machine 1. Further, a fluid passage 14 for pushing the second pig 2p positioned at the other end of the paint channel 11 to the one end side is provided at the end of the paint channel 11. On the other hand, a certain distance from the other end of the fluid flow path 12 to the one end side is a straight path that is close to and parallel to the straight path of the paint flow path 11. The head 11v of the direction control valve 1v can move in the straight path of the fluid flow path 12. The communication path 13 communicates the straight path of the paint flow path 11 and the straight path of the fluid flow path 12 so as to be orthogonal to each other. For example, the inner diameter of the paint flow path 11 in which the second pig 2p reciprocates is about 6 mm, and the inner diameter of the connection path 13 is prevented so that the second pig 2p does not move from the straight path of the paint flow path 11 to the connection path 13. Is formed smaller than the inner diameter of the paint channel 11.

  Next, the operation of the coating apparatus 200 according to the second embodiment will be described.

  In FIG. 9, when the second paint container B2 is installed at a predetermined position in the arm A, a solvent (for example, thinner) is supplied from the hollow piston rod PR. And a solvent is supplied in the solvent storage chamber 3b, and the movable valve 30 moves to the paint storage chamber 3a side, whereby the paint in the paint storage chamber 3a can be supplied to the paint flow path 11. In the initial state, the second pig 2p is located in the pig storage chamber 3c. Further, the head 11v moves to one end side of the fluid flow path 12 beyond the communication path 13 (see FIG. 15). In FIG. 9, when the solvent is further supplied from the hollow piston rod PR, the paint delivered from the paint storage chamber 3a is sprayed from the spray port 1a via the communication path 13 (see FIG. 15).

  Next, when the supply of the solvent from the hollow piston rod PR is stopped and the solvent (for example, thinner) is supplied from the base end side (the direction of the arrow S in the figure) of the first port p1, it is pushed out by the solvent and the second The pig 2p moves to the second port p2 side, and the second pig 2p is further injected from the second opening 31 into the paint flow path 11 (see FIG. 10).

  Pushed by the solvent supplied from the first port p1, the second pig 2p moves to the other end side of the paint channel 11 (see FIG. 10). Then, the paint pushed out to the second pig 2p is discharged from the spray port 1a from one end side of the paint flow path 11 through the communication path 13 and the other end side of the fluid flow path 12 (see FIG. 16). In FIG. 11, when the solvent is further supplied from the first port p1, the second pig 2p reaches the terminal on the other end side of the paint channel 11 (see FIG. 17). Then, the supply of the solvent from the first port p1 is stopped, and the predetermined painting operation is finished.

  As described above, in the coating apparatus according to the second embodiment of the present invention, the second pig pushes the paint in the paint channel to the vicinity of the spray port, so that the paint discharged from the second paint container can be almost used up. . Further, the solvent for extruding the second pig functions as a cleaning liquid for the paint channel, and for example, thinner is used.

  When the predetermined painting operation is completed, the head 11v moves to the other end side of the fluid flow path 12 over the communication path 13 (see FIGS. 17 and 18). Next, in FIG. 17, a fluid (for example, air) is supplied from one end side of the fluid flow path 12, and the solvent remaining in the paint flow path 11 is pushed back to the pig storage chamber 3c side via the communication path 13 (FIG. 12). Next, at the timing when the solvent is discharged from the communication path 13, fluid (for example, air) is supplied from the fluid passage 14, and the second pig 2 p positioned at the other end of the paint flow path 11 passes through the paint flow. It pushes out to the one end side of the path | route 11 (refer FIG. 17).

  A fluid (for example, air) is further supplied from one end side of the fluid flow path 12, and the second pig 2p moves toward the one end side in the paint flow path 11 (see FIGS. 12 and 13). Then, the solvent pushed out to the second pig 2p is discharged from the second port p2. During this time, the base end side of the first port p1 is closed. Eventually, the second pig 2p returns to the pig storage chamber 3c and returns to the initial state (see FIG. 13). Then, the supply of fluid from one end side of the fluid flow path 12 is stopped (see FIG. 17).

  Next, the other end side of the fluid flow path 12 where the paint remains is washed. In FIG. 14, a solvent (for example, thinner) is supplied from the base end side (the direction of arrow S in the figure) of the second port p2. On the other hand, the head 11v is moved to one end side of the fluid flow path 12 over the communication path 13 (see FIG. 19). The solvent supplied from the base end side of the second port p2 is discharged from the spray port 1a via the paint flow path 11, the communication path 13, and the other end side of the fluid flow path (see FIG. 19). When the other end side of the fluid flow path 12 where the paint remains is washed, the supply of the solvent from the proximal end side of the second port p2 is stopped. And it can replace | exchange for the following 2nd coating material container B2 (refer FIG. 14).

  As described above, the coating apparatus according to the second embodiment of the present invention is a state in which the paint container is placed on the painting robot without removing the paint container from the painting robot every time cleaning is performed for color change. Since the remaining paint can be washed from the paint supply port to the paint injection port, the process time can be shortened.

  In the present invention, a solvent (for example, thinner) is fed into the paint container to supply a fixed amount of paint from the paint container. However, the linear motion shaft provided in the servo motor moves the movable valve. A fixed amount of paint may be supplied from the coating container.

It is a schematic structure figure showing a 1st embodiment of a painting device by the present invention. It is a schematic block diagram of the coating apparatus by the said 1st Embodiment, and is a state change figure of FIG. It is a schematic block diagram of the coating apparatus by the said 1st Embodiment, and is a state change figure of FIG. It is a schematic block diagram of the coating device by the said 1st Embodiment, and is a state change figure of FIG. It is a principal part expanded sectional view of the coating device by the said 1st Embodiment, and respond | corresponds to the state diagram of FIG. It is a principal part expanded sectional view of the coating device by the said 1st Embodiment, and respond | corresponds to the state diagram of FIG. It is a principal part expanded sectional view of the coating device by the said 1st Embodiment, and respond | corresponds to the state diagram of FIG. It is a principal part expanded sectional view of the coating device by the said 1st Embodiment, and respond | corresponds to the state diagram of FIG. It is a schematic block diagram which shows 2nd Embodiment of the coating device by this invention. It is a schematic block diagram of the coating device by the said 2nd Embodiment, and is a state change figure of FIG. It is a schematic block diagram of the coating device by the said 2nd Embodiment, and is a state change figure of FIG. It is a schematic block diagram of the coating device by the said 2nd Embodiment, and is a state change figure of FIG. It is a schematic block diagram of the coating device by the said 2nd Embodiment, and is a state change figure of FIG. It is a schematic block diagram of the coating device by the said 2nd Embodiment, and is a state change figure of FIG. It is a principal part expanded sectional view of the coating apparatus by the said 2nd Embodiment, and respond | corresponds to the state diagram of FIG. It is a principal part expanded sectional view of the coating device by the said 2nd Embodiment, and respond | corresponds to the state diagram of FIG. It is a principal part expanded sectional view of the coating apparatus by the said 2nd Embodiment, and respond | corresponds to the state diagram of FIG. It is a principal part expanded sectional view of the coating apparatus by the said 2nd Embodiment, and respond | corresponds to the state diagram of FIG. It is a principal part expanded sectional view of the coating device by the said 2nd Embodiment, and respond | corresponds to the state diagram of FIG. It is a schematic block diagram by 1st Example of the color change apparatus by a prior art. It is an expanded longitudinal cross-sectional view of the rotary atomizing head type coating device by a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coating machine 1a Spray port 1p 1st pig 1v Direction control valve 2a * 3a Paint storage chamber 2b * 3b Solvent storage chamber 2p 2nd pig 3c Pig storage chamber 11 Paint flow path 11v Head 12 Fluid flow path 13 Connection path 20/30 Movable valve 21 1st opening 31 2nd opening 100/200 Painting equipment A Arm (arm of painting robot)
B1 first paint container B2 second paint container

Claims (5)

One end has a spray port for spraying paint, and the other end is a painter connected to the tip of the arm of the painting robot, and is detachably installed in the arm of the painting robot, and contains a separate paint for each color. A coating device for supplying an individual paint for each color from the first paint container to the spray port,
The first paint container includes a paint storage chamber for storing the paint and a movable valve for isolating the interior of the solvent storage chamber capable of storing the solvent, and the movable valve moves when the solvent is supplied to the solvent storage chamber. A first opening through which the paint flows out from the paint storage chamber,
One end is connected before Symbol first opening and the other end through the first linear path parallel to the axial center of the head of the coating machine, the paint flow its end terminates reaches the vicinity of the spray nozzle Road,
A fluid is supplied to one end, and the other end is a fluid flow path that terminates in the vicinity of the spray port through a second linear path parallel to the first linear path, A fluid flow path communicating with the spray port;
A first pig that seals the interior of the paint channel and is movably accommodated in the interior of the paint channel;
A direction control valve having a head capable of moving inside the second linear path by sealing the other end of the fluid flow path;
A connecting path that connects the first straight path and the second straight path so as to be orthogonal to each other, wherein the first pig moves to the end side of the first straight path and passes through one end. A communication path in which the other end is open so that the portion is open and the head moves to the end side of the second straight path, or moves to one end side of the second straight path,
A fluid passage that is provided at the end of the first straight path and pushes the first pig located at the end of the first straight path to the one end side of the paint flow path with the fluid ; and
When the head moves to one end side of the fluid flow path beyond the communication path, the first pig moves to the other end of the paint flow path so that the paint flows into the communication path and the fluid flow. Supplied to the spray port through the end of the path ,
The head moves over the communication path to one end of the fluid flow path, and the fluid is supplied from the fluid path so that the first pig passes over the communication path, and the fluid passes through the communication path and the fluid. The head moves over the communication path to the other end side of the fluid flow path at the timing when the remaining paint reaching the spray opening through the end of the flow path is discharged from the spray opening, and the fluid flow A coating apparatus that further supplies the fluid from a path through the communication path to recover the remaining paint supplied from the first paint container to the first paint container by returning the first pig to the first paint container. One end has a spray port for spraying paint, and the other end is a painter connected to the tip of the arm of the painting robot, and is detachably installed in the arm of the painting robot, and contains a separate paint for each color. A coating device for supplying an individual paint for each color from the second paint container to the spray port,
The second paint container includes a paint storage chamber for storing the paint and a movable valve for isolating the interior into a solvent storage chamber for storing the solvent, and when the solvent is supplied to the solvent storage chamber, the movable valve moves to A pig storage chamber having a second opening through which the paint flows out from the paint storage chamber, a first port and a second port through which the solvent can flow in and out, and storing a second pig between the first port and the second port When the solvent is supplied from the first port and connected to the second opening, the second pig is ejected from the second opening and the second pig is moved by the fluid supplied toward the second opening. A pig storage room to be returned,
One end is connected before Symbol second opening, the other end, through a first linear path parallel to the axial center of the head of the coating machine, the paint flow its end terminates reaches the vicinity of the spray nozzle Road,
A fluid is supplied to one end, and the other end is a fluid flow path that terminates in the vicinity of the spray port through a second linear path parallel to the first linear path, A fluid flow path communicating with the spray port;
A second pig that seals the interior of the paint channel and is movably accommodated in the interior of the paint channel;
A direction control valve having a head capable of moving inside the second linear path by sealing the other end of the fluid flow path;
A connecting path that connects the first straight path and the second straight path so as to be orthogonal to each other, and the second pig moves to the end side of the first straight path and passes through one end. A communication path in which the other end is open so that the portion is open and the head moves to the end side of the second straight path, or moves to one end side of the second straight path,
A fluid passage that is provided at the end of the first straight path and pushes the second pig positioned at the end of the first straight path to the one end side of the paint flow path with the fluid ; and
When the solvent is supplied from the first port while the head is moving to the one end side of the fluid flow path beyond the communication path, the second pig moves the communication path from one end side of the paint flow path. Beyond the end of the first straight path , and the paint is pushed out to the second pig and from one end of the paint flow path to the spray port through the communication path and the other end of the fluid flow path. More drained painting equipment. The head moves over the communication path to one end of the fluid flow path and supplies the fluid from the fluid path so that the second pig crosses the communication path and the fluid passes through the communication path and the fluid. The head moves over the communication path to the other end side of the fluid flow path at the timing when the remaining paint reaching the spray opening through the end of the flow path is discharged from the spray opening, and the fluid flow The second pig returns to the pig storage chamber by further supplying the fluid from the path through the communication path, and the head is moved to one end side of the fluid flow path over the communication path, supplying the solvent from said second port, coating apparatus of claim 2 wherein the solvent is injected from the spray nozzle through the paint passage and the communication path. The said coating machine is a bell type coating machine provided with a bell cup that rotates around the spray port and a shaping air ring that blows air on the outer periphery of the bell cup, and atomizes the paint. The coating apparatus in any one of. The coating apparatus according to claim 4, wherein the coating machine is a bell type coating machine having a bell cup at a tip and formed of a cylindrical housing that is bent at an obtuse angle.

Images