JP2010120148A - Attachment structure of spray gun in painting device, and replacement method of spray gun using the structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a painting device facilitating color change work of paint, and paints even a side face of a workpiece during rotational painting. <P>SOLUTION: A spray gun support arm 9 fitted with a plurality of spray guns 12 is detachably locked at an end of a robot arm 2 disposed in a painting booth through a locking member 7. The spray gun support arm 9 is provided with: an arm body 10; a plurality of the spray guns 12 detachably attached to the arm body 10; and a locking claw 11 protruded and provided at the arm body 10. The locking member 7 to which the locking claw 11 is locked is supported by a shaft to the end of the robot arm 2 to rotate freely, the spray gun support arm 9 is attached to the robot arm 2 by locking the locking claw 11 in the spray gun support arm 9 to the locking member 7, and locking of the locking claw 11 to the locking member 7 is released to remove the spray gun support arm from the robot arm 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a spray gun mounting structure in a coating apparatus and a method of replacing a spray gun using the spray gun, and more particularly, to a spray gun mounting structure in a coating apparatus that enables the spray gun to be replaced in a short time. The present invention relates to a method for replacing a spray gun using the same.

  As is well known, in a painting apparatus used for painting a workpiece, the paint in the paint tank is supplied to the spray gun via the paint hose, and the paint is sprayed from the spray gun toward the workpiece, thereby painting the workpiece. Therefore, when the paint to be used is replaced, the paint tank must be replaced, and the inside of the spray gun and the inside of the paint hose must be cleaned, which requires time and effort.

  On the other hand, in recent years, when painting workpieces, the number of workpieces to be coated with the same paint has decreased, and so-called high-mix low-volume production has increased. In the conventional coating apparatus that interrupts the work and cleans the inside of the spray gun and the paint hose, the efficiency of the entire painting work is reduced.

  Therefore, conventionally, as a method for preventing such a reduction in work efficiency due to paint replacement, a set of a plurality of spray guns capable of discharging paints of different colors is used as one set. There are provided a double-gun type coating apparatus that can be mounted on a plurality of robot arms, etc., and spray different colors of paint without changing the spray gun.

  In this double gun type coating apparatus, for example, two spray guns capable of spraying paints of different colors are set as one set, and a spray gun support arm provided with three sets of the spray gun is set as a robot arm. In such a coating device, when changing the color of the paint, it is only necessary to change the spray gun to be operated, and the color of the paint can be changed without interrupting the work. Is possible.

  By the way, in the past, for the purpose of shortening the painting time, the present applicant mounted a work along the circumference on the peripheral portion of the work supply table, rotated the work supply table in this state, and rotated the work supply table. A rotation coating method has been proposed in which coating is performed by spraying a paint onto a rotating workpiece (see Japanese Patent Application Laid-Open No. 11-290733). The problem is that it is difficult to paint the part.

  That is, in FIG. 3, 31 is a rotatable workpiece supply table, 32 is a workpiece placed on the peripheral edge of the workpiece supply table, and 33 is a spray gun. And when painting the side surface of the workpiece 32 in such rotary coating, as shown in the figure, the spray gun 33 is placed at the offset position inside the workpiece 32 on the workpiece supply table 31 and at the position (A) in the drawing. In this state, while rotating the work supply table 31, the paint is sprayed toward the work 32 to paint one side surface 32 a of the work 33.

  After that, the spray gun 33 is moved to the other offset position, that is, the position (B) in the figure, and in this state, the paint is sprayed while rotating the work supply table 31, and the other side face 32b of the work 32 is painted. As a result, the side surface portion of the workpiece 32 can be painted.

  However, in the above-mentioned double gun type coating apparatus, since two spray guns are simultaneously moved to the inside of the work 32, the spray gun is moved to the inside of the work and then the spray gun is moved to the offset position. Is impossible to do.

Therefore, in the above-mentioned double gun type coating apparatus, it is possible to reduce the time required for the color change work of the paint, but on the other hand, there is a problem that it becomes impossible to paint the side surface of the workpiece. .
Japanese Patent Laid-Open No. 11-290733

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a spray gun mounting structure and a spray gun replacement method in a coating apparatus, in which the color change operation of the paint is easy and the side surface of the work can also be painted in the rotary coating. It is said.

The spray gun mounting structure in the painting apparatus according to the present invention includes a spray gun support arm having a plurality of spray guns attached to the tip of a robot arm movably disposed in the painting booth via a locking member. It is characterized by being detachably locked,
The spray gun support arm includes an elongated arm body, a plurality of spray guns detachably attached to the arm body, and locking claws protruding from the arm body.
The locking member is capable of locking the locking claw, and is pivotally supported at the tip of the robot arm,
By locking the locking claw in the spray gun support arm to the locking member, the spray gun support arm is attached to the robot arm, and the locking claw with respect to the locking member is released. The spray gun support arm is removed from the robot arm.

Further, in the spray gun replacement method of the present invention using this spray gun mounting structure, the spray gun support arm is fixed to the robot arm by locking a locking claw of the spray gun support arm to the locking member. Wear the arm,
The spray gun support arm is removed from the robot arm by releasing the lock of the lock claw of the spray gun support arm from the lock member.

  In the present invention, a locking member is attached to the tip of the robot arm, and a plurality of spray guns are attached to a spray gun support arm having a locking claw that can be locked to the locking member. The spray gun is attached to and detached from the robot arm by locking or releasing the locking member.

  Therefore, when changing the color of the paint, it is only necessary to replace the spray gun support arm without cleaning the inside of the spray gun or the paint hose. Since the spray gun can be moved to the offset position after moving the inside of the workpiece, the side surface of the workpiece can also be painted.

  The present invention has a robot arm that is movably disposed in the painting booth. A locking member is attached to the tip of the robot arm, and a plurality of spray guns are attached to the locking member. The mounted spray gun support arm is detachably locked.

  The spray gun support arm has an elongated flat plate-like arm body, and a spray gun to which a paint hose, an air hose, etc. are respectively connected at a plurality of positions on the lower surface of the arm body, It is detachably mounted at intervals. A locking claw projects from the upper surface of the arm body of the spray gun support arm.

  On the other hand, the locking member can be locked by a locking claw of the spray gun support arm and is pivotally supported at the tip of the robot arm.

  The spray gun support arm is attached to the robot arm by locking the locking claw of the spray gun support arm to the locking member, while the locking claw is engaged with the locking member. The spray gun support arm is removed from the robot arm by releasing the stop.

  Here, the robot arm includes a connecting portion that is movably connected to a rail in the painting booth, a first arm that is pivotally supported by the connecting portion, and a first arm that is rotatable. And a second arm that is pivotally supported, and the locking member may be pivotally supported at the tip of the second arm.

  Also, it is preferable to attach an air cylinder to the locking member and press the arm body with the air cylinder after locking the locking claw in the spray gun support arm to the locking member. It becomes possible to fix the position of the arm.

  And when replacing | exchanging a spray gun in the coating device of this invention comprised in this way, the said spray gun support is cancelled | released by releasing the latching of the latching claw in the said spray gun support arm to the said latching member. The arm is detached from the robot arm, and then the spray gun support arm is attached to the robot arm by locking the locking claw of the spray gun support arm to the locking member.

  An embodiment of a spray gun mounting structure in a coating apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view for explaining the spray gun mounting structure of the present embodiment. The spray gun mounting structure has a robot arm movably connected to a rail provided in the painting booth, and a spray gun support arm attached to the robot arm. A plurality of spray guns are installed.

  In other words, reference numeral 2 in the figure denotes a robot arm constituting the spray gun mounting structure of this embodiment. The robot arm 2 has a connecting portion 3 movably connected to the rail, and a first arm 4 is pivotally supported on the connecting portion 3. Further, a second arm 5 is pivotally supported on the arm 4, and a locking member to which the spray gun support arm is locked is connected to the second arm 5.

  Here, the locking member will be described. In the figure, reference numeral 7 denotes a locking member. In this embodiment, the locking member 7 is pivotally supported on the side wall of the distal end portion of the second arm 5. A pair of rotating portions 701 are provided. The rotating portion 701 has a flat plate shape, a base end portion pivotally supported by the second arm 5 and a distal end portion communicated by a flat plate-like communicating portion 702.

  In the figure, 8 is an air cylinder. That is, the air cylinders 8 are provided on the outer portions of the rotating portions 701, respectively.

  Next, the spray gun support arm that is locked to the locking member 7 will be described. In FIG. In this embodiment, the spray gun support arm 9 has a long and flat arm main body 10, and a plurality of spray guns are mounted on the lower surface of the arm main body 10 at intervals. Has been.

  That is, in the figure, 12 is a spray gun, and in this embodiment, one is provided at each of the vicinity of both ends of the arm body 10, and two spray guns 12 near the both ends are provided with a predetermined interval. A total of four spray guns 12 are installed. Although not shown, each spray gun 12 is supplied with a paint hose for supplying paint to each spray gun 12 and air for atomizing and spraying the paint to each spray gun. Air tube is connected. Further, the coating apparatus of this embodiment is a single gun system, and the same color paint is supplied to each spray gun 12.

  Next, a locking claw used to lock the spray gun support arm 9 to the locking member 7 is continuously provided on the upper surface of the arm body 10.

  That is, in the figure, reference numeral 11 denotes a locking claw, and in this embodiment, there are two locking claws, and each locking claw 11 is a rising portion suspended from the upper surface of the arm body 10. 1101 and a locking claw main body 1102 that is connected to the tip of the rising portion 1101 in a direction parallel to the surface of the arm main body 10. The rising portion 1101 is connected to the rear end of the surface of the arm body 10 in the direction perpendicular to the longitudinal direction, and thus the locking claw body 1102 is positioned above the surface of the arm body 10. It is arranged to do.

  Further, the pair of locking claws 10 are disposed on both sides of the central portion of the arm body 10 facing in the longitudinal direction, and both the locking claws 10 are simultaneously connected to the communicating portion 702 in the locking member 7. It is arrange | positioned in the position which can be latched to.

  Therefore, according to the spray gun mounting structure in the coating apparatus of the present embodiment, the robot arm 2 is driven, and the locking claw 10 is locked to the communication portion 702 of the locking member 7, whereby the robot The spray gun support arm 9 can be attached to the arm 2. On the other hand, the robot arm 2 can be attached to the robot arm 2 by releasing the locking claw 11 from the communication portion 702 of the locking member 7 in this mounted state. Since the spray gun support arm 9 can be mounted, the spray gun support arm 9 can be removed.

  In the above description, the robot arm 2 includes the connecting portion 3 movably connected to the rail provided in the painting booth, and the first arm 4 pivotally supported by the connecting portion 3. The second arm 5 is pivotally supported by the first arm 4 and the locking member 7 is connected to the second arm 5. However, such a configuration is not necessarily required. It is only necessary that the spray gun support arm can be detachably locked to the distal end portion via the locking member.

  Next, an embodiment of the spray gun replacement method of the present invention using the spray gun mounting structure of the present embodiment configured as described above will be described. In this embodiment, the spray gun support arm 9 is attached to the robot arm 2. When mounting, the first arm 4, the second arm 5, and the locking member 7 of the robot arm 2 are appropriately rotated so that the communication portion 702 of the locking member 7 is connected to the upper surface of the arm body 10, the locking claw 11. The spray gun support arm 9 is locked to the locking member 7 by being inserted into a space surrounded by the rising portion 1101 and the locking claw body 1102.

  Further, in a state where the spray gun support arm 9 is locked to the locking member 7, the air cylinder 8 is operated and the arm body 10 is pressed by the piston of the air cylinder 8, whereby the arm 9 is fixed and the arm is fixed. 9 misalignment is prevented.

  Then, the spray gun support arm 9 equipped with a plurality of single guns can be attached to the distal end portion of the robot arm 2 via the locking member 7, and the workpiece can be painted. FIG. 2 shows a part of this state from the front.

  On the other hand, when the spray gun support arm 9 is removed, the air cylinder 8 is actuated to release the fixation of the spray gun support arm 9 and then the first arm 4 and the second arm 2 of the robot arm 2 are reversed. The space surrounded by the upper surface of the arm body 10, the rising part 1101 of the locking claw 11, and the locking claw body 1102 by appropriately rotating the arm 5 and the locking member 7. Get out from inside. Then, the locking claw 11 is unlocked from the locking member 7, whereby the spray gun support arm 9 can be removed from the robot arm 2.

  Therefore, in the present embodiment, when the color is changed during the painting of the workpiece, it is only necessary to replace the spray gun support arm 9 by the above-described method, and the inside of the paint hose and the inside of the spray gun are washed when the color of the paint is changed. It is possible to improve work efficiency.

  Further, in the present embodiment, since the single gun is used, when the rotary coating is performed, the spray gun can be moved to the inside of the workpiece on the workpiece supply table and then moved to the offset position. Can also be painted.

  Furthermore, since the arm is fixed by the air cylinder, it is possible to prevent the arm from being displaced.

  Since the present invention facilitates color change and enables painting of the side portion of the workpiece in the rotation painting, there is a possibility of color change and a painting apparatus capable of painting the side portion of the workpiece. It is applicable to all of the above.

It is a perspective view for demonstrating the Example of the attachment structure of the spray gun of this invention. It is a partial front view for demonstrating the effect | action of the Example of the attachment structure of the spray gun of this invention. It is a figure for demonstrating the problem of the conventional double gun type coating apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Robot arm 3 Connection part 4 1st arm 5 2nd arm 7 Locking member 701 Rotating part 702 Communication part 8 Air cylinder 9 Spray gun support arm 10 Arm main body 11 Locking claw 1101 Standing part 1102 Locking claw main body 12 Spray gun

Claims (4)

A spray gun support arm (9) equipped with a plurality of spray guns (12) is attached to and detached from the tip of a robot arm (2) movably disposed in the painting booth via a locking member (7). It is characterized by being freely locked,
The spray gun support arm (9) includes an elongated arm body (10), a plurality of spray guns (12) removably attached to the arm body (10), and the arm body (10). A locking claw (11) projecting from
The locking member (7) can be locked by the locking claw (11) and is pivotally supported at the tip of the robot arm (2).
The spray gun support arm (9) is attached to the robot arm (2) by engaging the locking claw (11) of the spray gun support arm (9) with the locking member (7), A spray gun mounting structure in a coating apparatus in which the spray gun support arm is removed from the robot arm (2) by releasing the locking claw (11) from the locking member (7).   The robot arm (2) includes a connecting part (3) movably connected to a rail in the painting booth, a first arm (4) pivotally supported by the connecting part (3), A second arm (5) pivotally supported by the first arm (4), and the locking member (7) can be pivoted at the tip of the second arm (5). 2. A spray gun mounting structure in a coating apparatus according to claim 1, wherein the spray gun is supported on a shaft.   An air cylinder (8) is attached to the locking member (7), and a locking claw (11) in the spray gun support arm (9) is locked to the locking member (7), and then the air cylinder (8 The structure of the spray gun in the coating apparatus according to claim 1 or 2, wherein the position of the spray gun support arm (9) is fixed by pressing the arm body (10). A method of replacing a spray gun using the spray gun mounting structure in the coating apparatus according to any one of claims 1 to 3,
The spray gun support arm (9) is attached to the robot arm (2) by locking the locking claw (11) of the spray gun support arm (9) to the locking member (7), and the spray gun The spray gun support arm (9) is removed from the robot arm (2) by releasing the locking claw (11) of the gun support arm (9) from the locking member (7). How to replace the spray gun.

Images