JP7187275B2 - Spray gun equipment for painting - Google Patents

Description

The present invention relates to a spray gun device for painting, and more particularly, in a spray gun integrally provided with paint supply means, the spray gun can be easily attached to and detached from the painting machine, thereby coating a large number of workpieces and dispensing paint. The present invention relates to a coating spray gun device that enables efficient color change work.

Conventionally, in a coating apparatus, a spray gun for injecting paint onto an object to be coated (hereinafter referred to as a "workpiece") and paint supply means for supplying paint to the spray gun are separate and independent. The paint is supplied from the paint supply means to the spray gun through the paint hose, and the supplied paint is sprayed from the spray gun toward the workpiece.

However, when such a method is adopted, the spray gun and paint hose must be washed each time the paint color is changed, which is troublesome and reduces work efficiency. I was invited. In addition, when the spray gun and paint hose are washed each time the paint color is changed, the paint remaining in the hose is wasted and a cleaning solvent such as thinner is required, which is wasteful. In particular, in recent years, the number of workpieces for high-mix, low-volume production has increased, so conventional methods cannot handle the reduction in work efficiency due to such cleaning work, the waste of residual paint, and the use of cleaning solvents, leading to an increase in costs. We were connected.

For this reason, the present applicant has in the past developed an invention (hereinafter referred to as "syringe gun") in which a spray gun is integrally provided at the tip of a syringe as paint supply means in order to solve the above-mentioned problems. Proposed.

That is, FIG. 10 is a partial cross-sectional view for explaining the syringe gun. In the figure, a syringe gun 71 has a paint discharge port 72 at its tip and an O-ring 82 as a sealing member on its outer periphery. and a head portion 75 as a spray gun formed integrally with the syringe portion 73 at the tip of the syringe portion 73. The head portion 75 is provided with an atomizing air supply path 76 and a pattern air supply path 77 which are open near the paint discharge port 72 .

When the syringe gun 71 is used for coating, a piston rod 78 is connected to the piston 74, a movable plate 79 is connected to the piston rod 78, a screw 80 is screwed to the movable plate 79, and a screw is screwed. 80 is connected to a motor 81 , and in this state, the motor 81 is rotated forward or backward, and air is supplied to the atomization air supply path 76 and the pattern air supply path 77 .

Then, the movable plate 79 advances along the screw thread 80, the piston 74 advances via the piston rod 78, and the paint in the syringe portion 73 is discharged to the head portion 75, and the discharged paint is It is atomized by the air supplied from the atomizing air supply path 76, and molded into an arbitrary pattern by the air supplied from the pattern air supply path 77, and is jetted toward the work.

In this way, in the syringe gun described above, the tip of the syringe for supplying the paint is integrally formed with the head as a spray gun for discharging the paint. Since the entire syringe gun is to be replaced in , there is no need to wash the spray gun when replacing the paint, and therefore it is possible to improve work efficiency, and thinner etc. required for cleaning cleaning solvent becomes unnecessary, and it is possible to improve the economic efficiency.

However, in the syringe gun described above, since the piston is advanced within the syringe and the paint in the syringe is discharged to the head, an O-ring is provided around the piston as a sealing material to prevent paint leakage. However, since the O-ring slides against the inner wall of the syringe when the piston moves, the O-ring wears quickly, making it difficult to completely seal the gap between the piston and the inner wall of the syringe.

Further, as described above, the syringe gun described above requires a movable plate 79, a screw screw 80, and a motor 81 as a driving system for advancing the piston and the piston. Since the motor 81 is structurally heavy, it is necessary to reduce the weight of the end effector when attaching the syringe gun to the arm of the painting robot.

Furthermore, as the piston diameter increases, the frictional resistance increases when the piston 53 moves within the syringe portion 54. In this case, it is necessary to increase the strength of the drive system, resulting in increased weight. It can be pointed out that there is a problem of fading.

In this respect, conventionally, a paint bag filled with paint is housed in a container, a working fluid is supplied into the container, and pressure is applied to the paint bag by the working fluid, thereby causing the paint in the paint bag to to the spray gun side has been proposed, and by using this paint cartridge, it is possible to completely prevent paint leakage.

Further, in the past, the applicant of the present invention has integrated a head portion as a spray gun on the tip side of a syringe portion provided with paint inside, and the syringe portion consists of a syringe body and a paint The pouch is composed of a pouch, and the paint pouch is compressed by supplying the working fluid into the syringe body, thereby supplying the paint in the paint pouch from the syringe part to the head part and discharging it from the head part. He proposed an invention (hereinafter referred to as "pouch gun").

According to this pouch gun, the inside of the syringe can be completely sealed, and the piston and it can be moved forward, unlike the conventional method in which the paint in the syringe is discharged by the forward movement of the piston in the syringe. It is possible to achieve weight reduction because a drive system for the motor is not required.

Japanese Patent No. 4398662 Japanese Patent No. 6158073 JP 2008-212857 A Japanese Patent Application Laid-Open No. 2007-319728 JP-A-2007-21452 Japanese Patent Application Laid-Open No. 2006-347606 JP 2005-296750 A

By the way, the above-mentioned pouch gun employs a system in which the working fluid is supplied into the syringe body to press the paint pouch and supply the paint to the head portion, and the working fluid supply means is connected to the syringe portion. Therefore, when replacing the gun, it is necessary to disconnect and reconnect with the means for supplying the hydraulic fluid, which may pose a problem of complicating the work. In the above-mentioned pouch gun, since the air injection means for supplying atomized air or pattern air is connected to the head portion, when the gun is replaced, the connection with the air injection means is released and reconnected. Connection is also required, which may also cause a problem that the work becomes complicated.

Therefore, the present invention provides a spray gun integrally provided with paint supply means, which is easily attachable and detachable to and from the coating machine, thereby eliminating waste of paint and cleaning solvent when changing colors, and increasing the number of workpieces. The object of the present invention is to make it possible to efficiently perform the painting and the color change work of the paint.

The coating spray gun device of the present invention is
A spray gun device for coating comprising a hand unit attached to a coating machine and a spray gun detachably attached to the hand unit,
The hand unit
a hand unit main body mounted on both ends of a ball screw spline in the coating machine and capable of supporting a spray gun;
The hand unit main body is formed with a locking claw portion for supporting the spray gun,
The movable part is
a hydraulic fluid supply joint connected to the hydraulic fluid supply means and used to supply the hydraulic fluid supplied from the hydraulic fluid supply means to the spray gun;
a hydraulic fluid discharge joint connected to the hydraulic fluid supply means and used to return the hydraulic fluid supplied to the spray gun to the hydraulic fluid supply means;
an air supply joint connected to an air supply means for supplying air supplied from the air supply means to the spray gun;
a connecting pin protruding forward of the movable part ,
The spray gun is
A spray gun body and a paint supply means for supplying paint to the spray gun body are integrally provided,
The spray gun body is
a paint supply path having a paint receiving port for receiving the paint supplied from the paint supply means, and a paint injection port for injecting the paint received from the paint receiving port toward a work;
a needle capable of opening and closing the paint injection port by advancing and retreating;
a needle operating means for advancing and retracting the needle;
The tip is opened at an arbitrary location around the paint injection port, and by supplying air around the paint injection port, the paint discharged from the paint injection port is atomized and the atomized paint is removed. and an air supply path for jetting to the tip side in an arbitrary pattern,
The paint supply means is
a manifold having a paint outlet communicating with the paint receiving port;
a casing connected to the manifold;
a bag-shaped paint pouch that is housed in the casing and has a paint discharge port connected to the paint discharge part, the interior of which is filled with paint;
The manifold is
a hydraulic fluid supply port connected to the hydraulic fluid supply joint for injecting the hydraulic fluid supplied from the hydraulic fluid supply means into the casing;
a hydraulic fluid discharge port connected to the hydraulic fluid discharge joint for returning the hydraulic fluid injected into the casing to the hydraulic fluid supply means;
an air supply port connected to the air supply joint for supplying air supplied from the air supply means to the air supply path of the spray gun main body;
an insertion hole into which the connecting pin is inserted;
a locking groove into which the locking pawl is inserted ;
By supplying the working fluid into the casing through the working fluid supply port, the paint pouch is pressed, and the paint in the paint pouch is discharged from the paint discharge part and supplied to the paint receiving port. year,
Connecting the hydraulic fluid supply joint and the hydraulic fluid supply port, connecting the hydraulic fluid discharge joint and the hydraulic fluid discharge port, connecting the air supply joint and the air supply port, and inserting the connecting pin into the insertion hole. By releasing it, it is possible to remove the spray gun attached to the coating machine,
By connecting the hydraulic fluid supply joint and the hydraulic fluid supply port, the hydraulic fluid discharge joint and the hydraulic fluid discharge port, and the air supply joint and the air supply port, and inserting a connecting pin into the insertion hole , the coating is performed. It is possible to attach a machine spray gun,
The spray gun is supported by the hand unit main body by inserting the locking claw into the locking groove, and the hydraulic fluid supply joint and the operating fluid supply joint are operated by advancing and retracting the movable part while supporting the spray gun on the hand unit main body. Enables connection or disconnection between the liquid supply port, the hydraulic fluid discharge joint and the hydraulic fluid discharge port, and the air supply joint and the air supply port, and inserts or releases the connection pin into the insertion hole. It is characterized by being made possible .

The coating spray gun device of the present invention comprises a hand unit attached to a coating machine, and a spray gun detachably attached to the hand unit. The spray gun is mounted in a casing containing a coating pouch. It has a structure in which the main body of the spray gun is integrated. Then, the spray gun is fed via the hand unit with hydraulic fluid for pressing the paint pouch to supply the paint in the paint pouch to the spray gun body, and the paint supplied to the spray gun body in an arbitrary pattern. Air for atomization and injection is supplied.

Therefore, when replacing the spray gun, it is only necessary to detach the spray gun from the hand unit. Since there is no need to connect and disconnect with the spray gun, it is easy to replace the spray gun, so that it is possible to efficiently paint a large number of workpieces and change paint colors.

Further, the spray gun in the coating spray gun apparatus of the present invention has a construction in which the spray gun main body is integrated with the casing containing the coating pouch, and the coating hose for supplying the coating to the spray gun is eliminated. Therefore, it is possible to eliminate the waste of the paint and cleaning solvent when changing the color of the paint, and it is possible to improve the economic efficiency.

1 is a perspective view for explaining a spray gun in an embodiment of a coating spray gun device of the present invention; FIG. 1 is a perspective view for explaining a spray gun in an embodiment of a coating spray gun device of the present invention; FIG. It is a figure for demonstrating the structure of the spray gun in the Example of the spray gun apparatus for painting of this invention. 1 is a cross-sectional view for explaining the structure of a spray gun body in an embodiment of a coating spray gun device of the present invention; FIG. 1 is a perspective view for explaining a spray gun in an embodiment of a coating spray gun device of the present invention, showing a state in which a casing is removed; FIG. 1 is a perspective view for explaining a spray gun in an embodiment of a coating spray gun device of the present invention, showing a state in which a casing is removed; FIG. 1 is a perspective view for explaining a hand unit in an embodiment of a coating spray gun device of the present invention; FIG. 1 is a perspective view for explaining a hand unit in an embodiment of a coating spray gun device of the present invention; FIG. It is a perspective view for demonstrating the usage method of the spray gun apparatus for painting of this invention. It is a figure for demonstrating the conventional syringe gun.

The coating spray gun device of the present invention comprises a hand unit and a spray gun. The hand unit is attached to the coating machine, and the spray gun is detachably attached to the hand unit. there is

The hand unit is connected to the hydraulic fluid supply means and is connected to the hydraulic fluid supply joint used for supplying the hydraulic fluid supplied from the hydraulic fluid supply means to the spray gun, and to the hydraulic fluid supply means to provide the spray. A hydraulic fluid discharge joint used to return the hydraulic fluid supplied to the gun to the hydraulic fluid supply means side, and a joint connected to the air supply means for supplying the air supplied from the air supply means to the spray gun. It has an air supply joint , a connecting pin, and a locking pawl for supporting the spray gun .

Further, the spray gun has a spray gun body and paint supply means for supplying paint to the spray gun body, and the spray gun body and the paint supply means are integrated.

The main body of the spray gun has a paint supply path, and the supply path includes a paint receiving port for receiving the paint supplied from the paint supplying means and for spraying the paint received from the paint receiving port toward the workpiece. It has a paint injection port for

Further, the spray gun main body has a needle capable of opening and closing the paint injection port by advancing and retreating, and a needle operating means for advancing and retreating the needle.

Furthermore, the main body of the spray gun has an air supply path, and the tip of this air supply path is opened at an arbitrary point around the paint injection port, and by supplying air around the paint injection port, , the paint ejected from the paint injection port is atomized and the atomized paint is sprayed to the tip side in an arbitrary pattern.

On the other hand, the paint supply means integrated with the spray gun body has a manifold and a casing connected to the manifold. I have.

Further, a paint pouch is housed in the casing, and this paint pouch has a paint discharge port connected to the paint discharge part of the manifold, and has a bag-like shape filled with paint. has been

In addition, the manifold has a hydraulic fluid supply port connected to a hydraulic fluid supply joint of the hand unit. used to inject into

Furthermore, the manifold has a hydraulic fluid discharge port connected to a hydraulic fluid discharge joint of the hand unit. It is used to return to the liquid supply means.

Furthermore, the manifold is connected to the air supply joint of the hand unit and has an air supply port for supplying air supplied from the air supply means to the air supply path of the spray gun main body. It has an insertion hole into which the pin is inserted and a locking groove into which the locking pawl is inserted .

By supplying the working fluid into the casing through the working fluid supply port, the paint pouch is pressed, and the paint in the paint pouch is discharged from the paint discharge part and sprayed through the paint receiving port. It is supposed to be supplied to the gun body.

Further, in the spray gun device of the present invention, disconnection of the hydraulic fluid supply joint and the hydraulic fluid supply port, disconnection of the hydraulic fluid discharge joint and the hydraulic fluid discharge port, and connection of the air supply joint and the air supply port are performed. By releasing the release of and the insertion of the connecting pin into the insertion hole , it is possible to remove the spray gun attached to the coating machine via the hand unit, and the hydraulic fluid supply joint and the operating By connecting the liquid supply port, the hydraulic fluid discharge joint and the hydraulic fluid discharge port, and the air supply joint and the air supply port , and inserting the connecting pin into the insertion hole , the coating machine can be connected via the hand unit. A spray gun can be attached.

Here, the hand unit includes a hand unit main body that is attached to the coating machine and capable of supporting the spray gun, and a movable portion that is attached to the hand unit main body so as to move back and forth, and is engaged with the hand unit main body. A claw portion is formed, and the movable portion is provided with a hydraulic fluid supply joint, a hydraulic fluid discharge joint , an air supply joint , and a connecting pin . By supporting the gun and moving the movable part forward and backward while supporting the spray gun on the hand unit body, the hydraulic fluid supply joint and hydraulic fluid supply port, the hydraulic fluid discharge joint and hydraulic fluid discharge port, and the air supply It enables connection or disconnection between the joint and the air supply port, as well as inserting or canceling the insertion of the connecting pin into the insertion hole . We make it easy.

The needle operating means for advancing and retracting the needle comprises a piston fixedly fitted with the needle and movably inserted in the head portion, a spring for biasing the piston toward the paint injection port, and an air pressure to the piston. It is preferable to provide an air supply means for pressing the needle to the side opposite to the paint injection port, thereby facilitating the operation of the needle.

An embodiment of the coating spray gun device of the present invention (hereinafter simply referred to as "spray gun device") will be described. The spray gun device of this embodiment comprises a spray gun for spraying paint onto a work, A hand unit is provided for attaching this spray gun to a coating machine such as a coating robot. The hand unit is attached to the coating machine, and the spray gun is detachable from the hand unit. That is, the spray gun is attached to the coating robot through the hand unit.

1 and 2 are perspective views showing the spray gun 11 of this embodiment, and FIG. 3 shows the structure of the spray gun 11 of this embodiment. It is a diagram for explanation, and in this embodiment, the spray gun 11 has a spray gun main body and paint supply means for supplying paint to the spray gun main body. 1 and 2, 12 is a spray gun body, 13 is a paint supply means, and the spray gun body 12 is connected to the lower part of the paint supply means 13. In this embodiment, the spray gun body 12 and the paint supply The means 13 are integral.

First, the spray gun main body 12 will be described. FIG. 4 is a cross-sectional view for explaining the structure of the spray gun main body 12. In this embodiment, the spray gun main body 12 has a paint supply passage formed therein. , the paint supplied from the paint supply means 13 can be received and the received paint can be jetted.

That is, in the figure, 14 is a paint supply passage, and this paint supply passage 14 comprises a paint receiving port 14a for receiving the paint supplied from the paint supplying means 13, and a paint receiving port 14a for directing the paint received from the paint receiving port 14a to the workpiece. The paint receiving port 14a is opened on the side wall side of the spray gun body 12, and the paint injection port 14b is opened on the tip surface of the spray gun body 12. ing.

Next, in FIG. 4, reference numeral 15 denotes a needle for opening and closing the paint injection port 14b. The needle 15 is movable in the longitudinal direction of the spray gun main body 12 by needle operating means, and moves forward. , the paint injection port 14b is closed, and the paint injection port 14b is opened by retreating.

Here, the needle operating means will be described. In this embodiment, the coating material supply path 14 extends from the coating material injection port 14b to the rear side of the spray gun body 12 by an arbitrary distance, and then extends from the side wall of the spray gun body 12. In the side wall of the spray gun main body 12, the paint receiving opening 14a is opened.

On the other hand, the needle 15 is arranged inside the spray gun main body 12 so as to pass through the central portion of the spray gun main body 12, the tip side is located in the paint supply passage 14, and the base end side is located in the spray gun main body. Inside 12, a piston 16 is fixed inside the spray gun main body 12 so as to be freely movable in the forward and rearward directions and protrude from the paint supply passage 14 outside the paint supply passage 14. As shown in FIG. The piston 16 is urged toward the tip of the spray gun body 12 by a spring 17, so that the needle 15 normally moves along with the piston 16 toward the tip of the spray gun body 12, and the tip of the needle 15 sprays paint. The mouth 14b is closed.

Next, inside the spray gun main body 12, an air chamber 18 is formed on the side opposite to the spring of the piston 16, and the base end side is opened at the side wall of the spray gun main body 12, and the tip side is the air chamber 18. A connected needle operating air supply path 19 is formed. An air conveying path (not shown) for needle operation formed in the coating material supply means 13 is connected to the base end side opening of the needle operation air supply path 19 , and air is supplied from the coating material supply means 13 . When the air is supplied, air is supplied into the air chamber 18 through the needle operating air supply path 19, and the piston 16 is pressed toward the base end side in the spray gun main body 12, thereby causing the needle 15 to move. It moves to the base end side of the spray gun main body 12, and the closure of the paint injection port 14b by the tip of the needle 15 is released.

Therefore, in this embodiment, by supplying air to the air chamber 18 or removing the supplied air, the needle 15 can be operated to open and close the paint injection port 14b. However, in the present invention, it is not always necessary to operate the needle 15 in the configuration described above, and any configuration may be used as long as the paint injection port 14b can be opened and closed by moving the needle 15 in the front-rear direction of the spray gun main body 12. may be

Next, in the figure, 20 is an atomizing air supply passage. That is, in this embodiment, the spray gun main body 12 is formed with an atomizing air supply passage 20 for atomizing the paint discharged from the paint injection port 14b and spraying it toward the work. The tip of the atomizing air supply path 20 is opened at an arbitrary location around the paint injection port 14b, and the base end of the atomizing air supply path 20 is formed in the paint supply means 13. (not shown), and when air is supplied through an atomizing air conveying path formed in the paint supply means 13, the atomizing air flows around the paint injection port 14b through the atomizing air supply path 20. is supplied, making it possible to atomize the paint discharged from the paint injection port 14b.

Next, in the figure, 21 is a pattern air supply path. That is, in this embodiment, the spray gun main body 12 is formed with a pattern air supply path 21 for changing the ejection pattern of the paint atomized by the atomizing air to an arbitrary pattern. The pattern air supply path 21 has an opening 2101 outside the opening of the tip of the atomizing air supply path 20 at the tip, and is formed in the paint supply means 13 at the base. When air is supplied through the pattern air transport path (not shown) formed in the coating material supply means 13 , the atomization air supply path 20 passes through the pattern supply path 21 . Pattern air is supplied around the tip opening, making it possible to change the ejection pattern of the paint atomized by the atomization air.

Next, the paint supply means 13 constituting the spray gun 11 together with the spray gun main body 12 will be described. is doing. The inside of the casing 24 is hermetically sealed, and a paint pouch 25 is accommodated therein.

Here, the manifold 23 will be described with reference to FIG. , to the paint receiving port 14a of the spray gun body 12 via a paint conveying path (not shown).

The manifold 23 also includes a hydraulic fluid supply portion 27 for supplying hydraulic fluid to the inside of the casing 24 and a hydraulic fluid discharge portion 28 (see FIG. 6) for discharging the hydraulic fluid supplied to the inside of the casing 24. equipped.

On the other hand, the paint pouch 25 has a bag-like shape, can be filled with paint, and has a paint discharge port 30 connected to the paint discharge part 26 . As a result, the paint in the paint pouch 25 can be supplied to the spray gun body 12 via the paint discharge section 26 , a paint conveying path (not shown), and the paint receiving port 14 a of the spray gun body 12 .

Here, the paint pouch 25 will be described. The paint pouch 25 of this embodiment is composed of a multi-layered film. It is supposed to return to its original size by filling it with paint.

5 and 6 are perspective views showing the spray gun 11 with the casing 24 removed. In the drawings, reference numeral 29 denotes the discharge of the hydraulic fluid supplied into the casing 24 from the casing 24 to the hand unit side. This hydraulic fluid discharge pipe 29 has a lower end connected to the working fluid discharge portion 28 and an upper end opened at the upper end portion within the casing 24 .

A hydraulic fluid supply port 31 and a hydraulic fluid discharge port 32 are formed on the side surface of the manifold 23. The hydraulic fluid supply port 31 communicates with the hydraulic fluid supply portion 27, and the hydraulic fluid discharge port 32 It communicates with the hydraulic fluid discharge portion 28 .

With this configuration, when the paint pouch 25 is filled with paint, the hydraulic fluid cannot be discharged from the hydraulic fluid discharge portion 28, and the hydraulic fluid is discharged from the hydraulic fluid supply portion 27 through the hydraulic fluid supply port 31. As the hydraulic fluid is supplied into the casing 24, the paint pouch 25 is pressed by the hydraulic fluid. As a result, the paint pouch 25 is compressed by the hydraulic fluid and becomes smaller. The paint is supplied to the spray gun main body 12 from the paint receiving port 14a of the spray gun main body 12 via a conveying path (not shown).

On the other hand, when the hydraulic fluid is supplied from the hydraulic fluid supply portion 27 into the casing 24 in a state where the hydraulic fluid can be discharged from the hydraulic fluid discharge portion 29, after the inside of the casing 24 is filled with the working fluid, , the hydraulic fluid supplied into the casing 24 is discharged to the outside of the casing 24 through a paint discharge pipe 29, a hydraulic fluid discharge portion 28 and a hydraulic fluid discharge port 32 which are open at the upper end of the casing 24. As shown in FIG. As a result, the hydraulic fluid can be returned through the casing 24, and since the upper end of the hydraulic fluid discharge pipe is open at the upper end portion in the casing 24, the inside of the casing 24 can be returned in the process of returning the hydraulic fluid. It becomes possible to easily perform air bleeding and the like.

Further, three air supply ports 33 are formed on the side surface of the manifold 23, and these air supply ports 33 are respectively formed in the paint supply means 13 for operating the needle and the atomizing air transport path. , pattern air transport paths (none of which are shown), and as described above, these air transport paths for needle operation, atomization air transport paths, and pattern air transport paths are connected to the spray gun body 12 respectively. It communicates with a needle operating air supply path 19, an atomizing air supply path 20, and a pattern air supply path 21, which are formed in .

Therefore, by injecting air from each of the air supply ports 33, air can be supplied to the needle operating air supply path 19, the atomization air supply path 20, and the pattern air supply path 21 formed in the spray gun main body 12. As a result, the needle 15 is operated to open the paint injection port 14b, and the paint supplied to the paint supply path 14 can be atomized in an arbitrary pattern and injected from the paint injection port 14b. .

Next, the hand unit for attaching the spray gun 11 to the coating robot 4 will be described. FIGS. 7 and 8 are perspective views showing the hand unit 34 of this embodiment, and FIG. , and FIG. 8 is a view from below. The hand unit 34 has a hand unit main body, and this hand unit main body is attached to the arm of the coating robot 4 or the like.

That is, in the figure, reference numeral 35 denotes a hand unit main body, and this hand unit main body 35 is box-shaped with an open top and has a movable portion 36 inside. The movable portion 36 is movable back and forth by an air cylinder 37 . In the figure, reference numeral 38 denotes an air supply pipe for supplying air to the air cylinder 37. As shown in FIG.

Next, in the figure, 39 is a hydraulic fluid supply joint, and 40 is a hydraulic fluid discharge joint. That is, the movable portion 36 is provided with a hydraulic fluid supply joint 39 and a hydraulic fluid discharge joint 40 . The hydraulic fluid supply joint 39 and the hydraulic fluid discharge joint 40 are connected to the hydraulic fluid supply means at their proximal ends, and the hydraulic fluid supply port 31 formed in the manifold 23 and the hydraulic fluid discharge joint 40 at their distal ends. It is connectable to the liquid discharge port 32 . Therefore, in the present embodiment, by connecting the hydraulic fluid supply joint 39 and the hydraulic fluid discharge joint 40 to the hydraulic fluid supply port 31 and the hydraulic fluid discharge port 32 of the manifold 23, respectively, the hydraulic fluid can flow into the casing 24. It is possible to supply and drain the hydraulic fluid in the casing 24 . In the figure, 46 and 47 are part of the hydraulic fluid supply means, 46 is a hydraulic fluid supply path, and 47 is a hydraulic fluid discharge path.

Next, in the figure, 41 is an air supply joint. That is, the movable portion 36 further has an air supply joint 41 to which the three air supply ports 33 formed on the side surface of the manifold 23 are connected. An air supply means is connected to the side. Therefore, in this embodiment, by connecting the air supply joint 41 to each of the three air supply ports 33 of the manifold 23, the needle operating air supply path 19 and the atomization air supply path formed in the spray gun main body 12 are connected. 20 and the pattern air supply path 21 can be supplied with air. 8, reference numeral 48 denotes a part of the air supply means, which is an air pipe for supplying air to the air supply joint 41. As shown in FIG.

Thus, in this embodiment, the hand unit 34 is provided with the hydraulic fluid supply joint 39 and the hydraulic fluid discharge joint 40 to which the hydraulic fluid supply means are connected, and the air supply joint 41 to which the air supply means is connected. Hydraulic fluid supply means or air supply means can be connected to the spray gun by simply attaching the spray gun 11 to the hand unit 34, and the hydraulic fluid can be supplied by simply removing the spray gun 11 from the hand unit 34. Since the connection between the supply means and air supply means and the spray gun can be released, when changing the paint color, the hydraulic fluid supply means and air supply means can be disconnected from the spray gun like a conventional pouch gun. There is no need to do it, and the work has become easier.

Next, in the figure, 42 is an engaging claw portion for supporting the spray gun 11 on the hand unit main body 35. As shown in FIG. That is, the hand unit main body 35 is formed with an engaging claw portion 42, while the manifold 23 of the spray gun 11 is formed with an engaging groove 43 in which the engaging claw portion 42 is engaged. (see Figures 2, 5 and 6). By inserting the locking claw portion 42 into the locking groove 43, the spray gun 11 can be supported on the hand unit main body 35. As shown in FIG.

In this embodiment, in a state in which the spray gun 11 is supported by the hand unit main body 35 by inserting the locking claw portion 42 into the locking groove 43, the movable portion 36 is advanced to supply the hydraulic fluid. The joint 39 and the hydraulic fluid supply port 31, the joint 40 for hydraulic fluid discharge and the hydraulic fluid discharge port 32, and the three air supply joints 41 and the three air supply ports 33 are connected to each other. It is possible to mount the spray gun 11 on the unit 34 . On the other hand, by retracting the movable portion 38 while the spray gun 11 is attached to the hand unit 34, the hydraulic fluid supply joint 39 and the hydraulic fluid supply port 31, the hydraulic fluid discharge joint 40 and the hydraulic fluid discharge port 32 , and the connection between the three air supply joints 41 and the three air supply ports 33 is released so that the spray gun 11 can be removed from the hand unit 34 .

7, 44 is a connecting pin, while 45 in FIG. 1 is an insertion hole. That is, in this embodiment, the movable portion 36 has a connecting pin 44 projecting forward between the hydraulic fluid supply joint 39 and the hydraulic fluid discharge joint 40. An insertion hole 45 into which a connecting pin 44 is inserted is formed between the liquid supply port 31 and the hydraulic fluid discharge port 32 . Accordingly, when the movable portion 36 is advanced, the connecting pin 44 is inserted into the insertion hole 45, thereby connecting the spray gun 11 to the hand unit 34. As shown in FIG.

Next, a description will be given of how to use the spray gun for coating according to the present embodiment constructed as described above. FIG. is a diagram showing a state in which the spray gun device of the present embodiment is attached to the coating robot 4 of FIG.

9, the coating robot 4 has a body pillar 401 erected on the base 5. A first arm 402 is connected to the body pillar 401 so as to be vertically rotatable. A second arm 403 is connected to 402 so as to be vertically rotatable. A long ball screw spline 404 is connected to the tip of the second arm 403. In this embodiment, the ball screw spline 404 is movable in the width direction of the second arm 403, that is, in the left-right direction. In addition, it is rotatable along the circumferential direction.

In the figure, 6 is a work fixing table for fixing a jig to which a work is attached. In this embodiment, the workpiece fixing table 6 has a pair of fixing arms 601 capable of fixing the jig at both ends, and the pair of fixing arms 601 are rotatably connected to the base 5. The workpieces can be exchanged by rotating the connecting portion 602 . That is, while the work fixed to one of the fixing arms 601 is being coated, the jig to which the next work to be coated is attached is fixed to the other fixing arm 601. By rotating the connecting part 602 after finishing the coating of the work fixed to the fixing arm 601, the work fixed to the other fixing arm 601 can be moved to the coating area and can be immediately coated.

The spray gun device of this embodiment is attached to both ends of the ball screw spline 404 in the coating robot 4 and used. That is, the hand unit 34 is attached to both ends of the ball screw spline 404, and the hydraulic fluid supply means is connected to the proximal end side of the hydraulic fluid supply joint 39 and the hydraulic fluid discharge joint 40 in the hand unit 34 to supply air. An air supply means is connected to the joint 41 for air supply.

After that, by inserting the locking claw portion 42 into the locking groove 43, the movable portion 36 is advanced while the spray gun 11 is supported by the hand unit main body 35, and the hydraulic fluid supply joint 39 and the hydraulic fluid supply port are connected to each other. 31, the hydraulic fluid discharge joint 40 and the hydraulic fluid discharge port 32, and the three air supply joints 41 and the three air supply ports 33 are respectively connected, and furthermore, the connection pin 44 is inserted into the insertion hole 45. By inserting it, the spray gun 11 can be connected to the hand unit 34, and the paint can be sprayed from the spray gun main body 12 toward the work.

When replacing the spray gun for color change or the like, it is sufficient to remove only the used spray gun 11 from the hand unit 34 and attach an unused spray gun to the hand unit. It is possible to spray the paint onto the workpiece from the newly installed spray gun without connecting to the liquid supply means or the air supply means.

In the present invention, the hydraulic fluid supply means and the air supply means connected to the hand unit 34 are not particularly limited. Therefore, the hydraulic fluid supply means only needs to have a hydraulic fluid tank storing hydraulic fluid such as water and a pump for supplying the hydraulic fluid in the hydraulic fluid tank to the hand unit side. can supply compressed air from a compressor or the like, and further has control means for controlling these pumps, compressors, and the like.

A syringe pump is preferably used as the pump in the hydraulic fluid supply means, and this makes it possible to supply a constant amount of hydraulic fluid into the casing 24, thereby discharging a constant amount of the paint in the paint pouch 25. becomes possible. Since the syringe pump is a well-known technique, detailed description is omitted. And, as a configuration in which the piston has a piston rod connected to the proximal end side of the syringe, by advancing the piston while the syringe is filled with hydraulic fluid, the hydraulic fluid in the syringe is passed through the hand unit 34 It is preferable to supply the inside of the casing 24 .

Also, the hydraulic fluid outlet 32 is preferably connected to the hydraulic fluid tank via the hydraulic fluid discharge path 47, so that the hydraulic fluid discharged from the casing 24 can be returned to the hydraulic fluid tank.

As described above, in the coating spray gun device of this embodiment, in the coating spray gun device using the spray gun in which the spray gun body is integrated with the coating material supplying means provided with the coating pouch, the spray gun is removed from the hand unit. The hydraulic fluid supply means or air supply means can be disconnected from the spray gun simply by removing it, and the spray gun can be attached to or detached from the hand unit simply by moving the movable part of the hand unit forward or backward. Therefore, it is easy to replace the spray gun, and it is possible to efficiently paint a large number of workpieces and change paint colors.

In addition, the spray gun has a structure in which the main body of the spray gun is integrated with the paint supply means equipped with the paint pouch, and the paint hose for supplying the paint to the spray gun is eliminated. It is only necessary to replace the gun, and the waste of paint and cleaning solvent can be eliminated, and the economy can be improved.

INDUSTRIAL APPLICABILITY The coating spray gun device of the present invention is applicable to all coating spray gun devices using a spray gun integrally provided with coating material supply means.

4 Painting machine (painting robot)
401 body portion 402 neck portion 403 head portion 404 ball screw spline (arm)
5 base 6 work fixing table 601 fixing arm 602 connecting part 11 spray gun 12 spray gun main body 13 paint supply means 14 paint supply passage 14a paint receiving port 14b paint injection port 15 needle 16 piston 17 spring 18 air chamber 19 needle operation Air supply path 20 Atomization air supply path 21 Pattern air supply path 23 Manifold 24 Casing 25 Paint pouch 26 Paint discharge part 27 Hydraulic fluid supply part 28 Hydraulic fluid discharge part 29 Hydraulic fluid discharge pipe 30 Paint discharge port 31 Hydraulic fluid supply port 32 Hydraulic fluid discharge port 33 Air supply port 34 Hand unit 35 Hand unit main body 36 Movable part 37 Air cylinder 38 Air supply pipe 39 Hydraulic fluid supply joint 40 Hydraulic fluid discharge joint 41 Air supply joint 42 Locking claw 43 Engagement Stop groove portion 44 Connecting pin 45 Insertion hole 46 Hydraulic fluid supply path 47 Hydraulic fluid discharge path 48 Air supply means

Claims (2)

A spray gun device for coating comprising a hand unit (34) attached to a coating machine (4) and a spray gun (11) detachably attached to the hand unit (34),
The hand unit (34)
A hand unit body (35) mounted on the coating machine (4) and capable of supporting the spray gun (11); have,
The hand unit main body (35) is formed with a locking claw (42) for supporting the spray gun (11),
The movable part (36) is
a hydraulic fluid supply joint (39) connected to a hydraulic fluid supply means and used to supply the hydraulic fluid supplied from the hydraulic fluid supply means to the spray gun;
a hydraulic fluid discharge joint (40) connected to the hydraulic fluid supply means and used to return the hydraulic fluid supplied to the spray gun to the hydraulic fluid supply means;
an air supply joint (41) connected to an air supply means for supplying air supplied from the air supply means to the spray gun;
a connecting pin (44) projecting forward of the movable part (36),
The spray gun (11) is
A spray gun body (12) and a paint supply means (13) for supplying paint to the spray gun body (12) are integrally provided,
The spray gun body (12) is
a paint receiving port (14a) for receiving the paint supplied from the paint supply means (13); and a paint injection port (14b) for injecting the paint received from the paint receiving port (14a) toward the work. a paint supply channel (14) having
a needle (15) capable of opening and closing the paint injection port (14b) by advancing and retreating;
a needle operating means for advancing and retracting the needle (15);
The tip is opened at an arbitrary position around the paint injection port (14b), and by supplying air around the paint injection port (14b), the paint discharged from the paint injection port (14b) is misted. an air supply path (20, 21) for spraying the atomized paint to the tip side in an arbitrary pattern,
The paint supply means (13) is
a manifold (23) having a paint outlet (26) communicating with the paint receiving port (14a);
a casing (24) connected to the manifold (23);
A bag-like paint pouch (25) which is housed in the casing (24), has a paint discharge port (30) connected to the paint discharge part (26), and is filled with paint. and
Said manifold (23)
a hydraulic fluid supply port (31) connected to the hydraulic fluid supply joint (39) for injecting the hydraulic fluid supplied from the hydraulic fluid supply means into the casing (24);
a hydraulic fluid discharge port (32) connected to the hydraulic fluid discharge joint (4) for returning the hydraulic fluid injected into the casing (24) to the hydraulic fluid supply means;
an air supply port (33) connected to the air supply joint (41) for supplying air supplied from the air supply means to the air supply paths (20, 21) of the spray gun body (12);
an insertion hole (45) into which the connecting pin (44) is inserted;
a locking groove (43) into which the locking claw (42) is inserted ;
By supplying the working fluid into the casing (26) through the working fluid supply port (31), the paint pouch (25) is pressed and the paint in the paint pouch (25) is discharged from the paint discharge section. (26) to be discharged and supplied to the paint receiving port (14a),
Connection between the hydraulic fluid supply joint (39) and the hydraulic fluid supply port (31), connection between the hydraulic fluid discharge joint (40) and the hydraulic fluid discharge port (32), air supply joint (41) and the air supply port By releasing the connection of (33) and the insertion of the connecting pin (44) into the insertion hole (45) , it is possible to remove the spray gun (11) attached to the coating machine (4). and
The hydraulic fluid supply joint (39) and the hydraulic fluid supply port (31), the hydraulic fluid discharge joint (40) and the hydraulic fluid discharge port (32), and the air supply joint (41) and the air supply port (33) ) and inserting the connecting pin (44) into the insertion hole (45) , the spray gun (11) can be attached to the coating machine (4),
The spray gun (11) is supported on the hand unit body (35) by inserting the locking claw (44) into the locking groove (43), and the spray gun (11) is supported on the hand unit body (35). By advancing and retreating the movable part (36) in this state, the hydraulic fluid supply joint (39) and the hydraulic fluid supply port (31), the hydraulic fluid discharge joint (40) and the hydraulic fluid discharge port (32), and the air It is possible to connect or disconnect the supply joint (41) and the air supply port (33), and to insert or cancel the insertion of the connecting pin (44) into the insertion hole (45). A painting spray gun device characterized by: The needle operating means includes a piston (16) to which the needle (15) is fixed and which is movably inserted in the spray gun main body (12); and an air supply means (19) for pressing the piston (16) with air pressure to the opposite side of the paint injection port (14b). Item 1. A coating spray gun device according to item 1.

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