JPH08266944A - Powder painting gun and cleaning device thereof - Google Patents

Abstract

PURPOSE: To provide a powder painting gun capable of easily removing bonded powder paint. CONSTITUTION: A gun main body 11 is supported by the pipe-shaped gun attaching jig 15 connected to the rear end part of the gun main body and a gun cable 14, a paint hose 12 and an air hose 13 are passed through the gun attaching jig 15. The outer peripheral part of the connection part of the gun main body 11 and the gun attaching jig 15 is covered with a cover member 17. By this constitution, the outer surface of the powder painting gun consists only of the gun main body 1, the pipe-shaped gun attaching jig 15 and the cover member 17 and has almost no unevenness and the cleaning of the powder painting gun becomes easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder coating gun for spraying a powder coating material onto an object by using static electricity, and a cleaning device for cleaning the outer surface of such a powder coating gun.

[0002]

2. Description of the Related Art A conventional powder coating gun is shown in FIG. In the gun body 1 for spraying the powder coating material, a paint hose 2 for supplying the powder coating material and an air hose 3 for supplying the air are connected through joints 2a and 3a, respectively, and A gun cable 4 for applying a predetermined electric potential to the electrode is connected via a connector 4a. The gun body 1 is attached to the gun mounting jig 5 at its side portion, and the gun mounting jig 5 is held by a reciprocator or the like (not shown). During coating, the gun body 1 is moved into the booth by the reciprocator, and the powder coating material is sprayed onto the object to be coated in the booth.

When coating is carried out in this manner, the powder coating material adheres not only to the gun body 1 but also to the coating hose 2, the air hose 3, the gun cable 4 and the gun mounting jig 5 in the booth. Therefore, when changing the color of the coating, the compressed air is blown to the powder coating gun with an air gun to remove the powder coating adhered to the outer surface of the powder coating gun, and then coating is performed using a new powder coating of a different color. I was going.

[0004]

However, as can be seen from FIG. 8, in the conventional powder coating gun, the irregularities of the gun mounting jig 5, the joints 2a and 3a, the connector 4a and the like are provided on the outer peripheral portion of the gun body 1. However, since a plurality of tubular members such as the paint hose 2, the air hose 3 and the gun cable 4 are connected, it takes a lot of time and effort to remove the adhered powder paint. In particular, the adhered powder coating can be removed only by blowing compressed air from various directions, not only from one direction, so that it was blown from another location to a location where it was once cleaned. The powder coating adhered, which made cleaning time-consuming.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a powder coating gun capable of easily removing the adhered powder coating material. Another object of the present invention is to provide a cleaning device for cleaning the outer surface of such a powder coating gun.

[0006]

A powder coating gun according to the present invention is a gun casing connected to a gun body and a rear end of the gun body to support the gun body and to be connected to the gun body.
It is provided with a pipe-shaped gun mounting jig through which a bull, a paint hose and an air hose are passed. The outer peripheral portion of the connecting portion between the gun body and the gun mounting jig may be covered with a cover member. Also, an attachment member may be fixed to the tip of the gun mounting jig to be detachably connected to the rear end of the gun body.

The powder coating gun cleaning device according to the present invention has a plurality of nozzle holes radially arranged in a plane perpendicular to the axial direction of the powder coating gun and surrounding the outer periphery of the powder coating gun. And a moving means for moving the cleaning jig and the powder coating gun relative to each other along the axial direction of the powder coating gun, and the cleaning jig and the powder coating gun are moved by the moving means. Compressed air is blown toward the powder coating gun from a plurality of nozzle holes of the cleaning jig while moving the gun relatively.

[0008]

In the powder coating gun according to the present invention, the gun main body is supported by the pipe-shaped gun mounting jig connected to the rear end of the gun main body, and the gun cable is mounted in the gun mounting jig. , Paint hose and air hose are passed through. Therefore, it is only necessary to remove the powder coating material attached to the outer surfaces of the gun body and the pipe-shaped gun mounting jig, and the powder coating gun can be easily cleaned. If the outer peripheral portion of the connecting portion between the gun body and the gun mounting jig is covered with a cover member, cleaning can be performed more easily.

Further, in the powder coating gun cleaning apparatus according to the present invention, the plurality of nozzle holes of the cleaning jig are radially arranged so as to surround the outer peripheral portion of the powder coating gun, and the cleaning jig is moved by the moving means. The compressed air is blown toward the powder coating gun from the plurality of nozzle holes of the cleaning jig while moving the powder coating gun and the powder coating gun relative to each other along the axial direction of the powder coating gun.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a powder coating gun according to an embodiment of the present invention. A pair of upper and lower mounting plates 11a and 11b are formed to project from the rear end of the gun body 11. Gun body 11
Pipe-shaped gun mounting jig 1 facing the rear end
5 is arranged, and a pair of upper and lower mounting plates 15a and 15b are formed at the tip of the gun mounting jig 15 so as to correspond to the mounting plates 11a and 11b of the gun body 11, respectively. The mounting plates 11a and 11b of the gun body 11 and the mounting plates 15a and 15b of the gun mounting jig 15 are engaged with each other, and the mounting screws 16 are used to mount the mounting plates 11a and 1b.
And 5a are connected and fixed.

Inside the pipe of the gun mounting jig 15, a paint hose 12 and an air hose 13 for supplying powder paint and air to the gun body 11 and a predetermined electric potential for applying electrodes to the gun body 11 are provided. A gun cable 14 including an electric signal line is passed together. The tip of the paint hose 12 is connected via the joint 12a, and the air hose 13 is connected to the joint 1
The gun cable 14 is connected to the rear end of the gun body 11 via the connector 14a.
Further, a cylindrical cover member 1 made of rubber so as to cover an outer peripheral portion of a connecting portion between the gun body 11 and the gun mounting jig 15.
7 are provided.

With such a structure, the outer surface of the powder coating gun has a cylindrical gun body 11 and the cover member 1.
7 and the pipe-shaped gun mounting jig 15 only, the outer surface is smooth with almost no unevenness. Therefore, even if the powder coating material adheres to the outer surface of the powder coating gun, the powder coating material can be easily removed by blowing compressed air or the like.

As shown in FIG. 2, a tubular attachment member 28 is fixed to the tip of a pipe-shaped gun mounting jig 25, and the rear end of the gun body 21 is detachably attached to this attachment member 28. May be connected to. On the tip end surface of the attachment member 28, the paint supply port 2 connected to the paint hose 22, the air hose 23, and the gun cable 24, which are passed through the gun mounting jig 25, respectively.
8a, an air supply port 28b, and a connector 28c are arranged. On the other hand, although not shown, a paint inlet, an air inlet, and a connector corresponding to the paint supply port 28a, the air supply port 28b, and the connector 28c of the attachment member 28 are arranged on the rear end surface of the gun body 21, respectively. When the gun body 21 is attached to the attachment member 28 with one touch, the paint supply port 28a, the air supply port 28b and the connector 28c of the attachment member 28 are attached.
Are connected to the paint inlet, the air inlet, and the connector of the gun body 21, respectively.

Even if the gun body 21 and the gun mounting jig 25 are connected via the attachment member 28 as described above, the outer surface of the powder coating gun is smooth without unevenness, so that the powder coating material attached can be easily attached. Can be cleaned.

Further, in the case of coating many kinds of objects to be coated in one booth, it is desirable to use an optimum powder coating gun for each object to be coated. For example, a minus corona gun is suitable for coating large areas quickly with high efficiency, a plus corona gun is suitable for highly efficient coating of a nylon coating that tends to be positively charged, and a tribogun is suitable for coating objects with many irregularities. It is suitable for coating and coating with excellent cosmetic properties. Therefore, the rear end of the gun body of such various powder coating guns is formed in the same shape, and the arrangement of the paint inlet, the air inlet, and the connector formed at the rear end is unified, and FIG. The attachment member 28 is arranged so as to correspond to the paint supply port 28a, the air supply port 28b, and the connector 28c, respectively. With this configuration, the gun body can be easily replaced according to the object to be coated.

FIG. 3 shows a cleaning device for cleaning the outer surface of the powder coating gun according to the present invention. Reciprocator 30
The gun mounting jig 15 of the powder coating gun is held in
A ring-shaped cleaning jig 31 is arranged so that the gun mounting jig 15 and the gun body 11 can be passed therethrough. Cleaning jig 31
Is held at one end of a rod 32, and the rod 32 is an air cylinder 33 (moving means) fixed to the reciprocator 30.
Is configured to be movable in the axial direction. An air hose 34 for supplying compressed air is connected to the cleaning jig 31.

As shown in FIG. 4, the inner surface of the ring-shaped cleaning jig 31 is radially arranged in a plane perpendicular to the axial direction of the powder coating gun and surrounding the outer periphery of the powder coating gun. A plurality of nozzle holes 31a are formed in the. Each nozzle hole 31a
Is inclined by a predetermined angle with respect to a plane perpendicular to the axial direction of the powder coating gun so that air is ejected toward the front of the powder coating gun.

During cleaning, the air cylinder 33 moves the cleaning jig 31 in the direction of arrow A in FIG. 4, that is, toward the front of the powder coating gun at a speed of 10 to 50 mm / sec. Compressed air is supplied from the device to the cleaning jig 31 via the air hose 34, and compressed air is ejected from the nozzle holes 31a. As mentioned above,
Since each nozzle hole 31a is inclined and air is ejected toward the front of the powder coating gun, it adheres as the cleaning jig 31 is moved from the gun mounting jig 15 to the gun body 11 in the A direction. The powder coating material that has been used is sequentially blown forward and prevented from adhering to the powder coating gun again. On the other hand, when the cleaning jig 31 is moved in the direction B of FIG. 4 and returned, the ejection of compressed air is stopped. Therefore, the moving speed of the cleaning jig 31 can be set higher than the moving speed in the A direction.

5 and 6 show a cleaning device according to another embodiment. The reciprocator 40 (moving means) holds a plurality of powder coating guns 41 vertically arranged with respect to each other so as to be vertically movable, and is movable along a rail 42 in the front-rear direction. A booth 43 is arranged in front of the reciprocator 40, and an object to be coated 44 is placed in the booth 43.
Is suspended. An opening 43a extending in the vertical direction for passing the powder coating gun 41 is formed on a side portion of the booth 43. A pair of guide rails 45 extending in the vertical direction is provided on the outer wall adjacent to the opening 43a of the booth 43, and a cleaning jig 46 is provided so as to be vertically movable by being guided by the guide rails 45. A moving device 48 such as an air cylinder that moves the cleaning jig 46 up and down is connected to the lower end of the cleaning jig 46 via a rod 47.

As shown in FIG. 7, the cleaning jig 46 is
Horizontally spaced from each other and each of the guide rails 45
Has a pair of vertical air pipes 49 that are guided to each other, and a plurality of air nozzles 50 are provided so as to project from each air pipe 49. When the height of the cleaning jig 46 is adjusted according to the powder coating gun 41, the tip of each air nozzle 50 is in the plane perpendicular to the axial direction of the powder coating gun 41 and the outer peripheral portion of the powder coating gun 41. It will be arranged radially so as to surround.

At the time of coating, the reciprocator 40 moves forward to position the powder coating gun 41 in the booth 43 through the opening 43a and move the powder coating gun 41 in the vertical direction to coat the object 44 to be coated. When the coating is completed, the moving device 48 adjusts the height of the cleaning jig 46 so that the air nozzle 50 corresponding to the height of each powder coating gun 41 is located. Then, compressed air is supplied from an unillustrated compressed air supply device to the air pipe 49 via the solenoid valve 51 and the connection hose 52, and the compressed air is ejected from the air nozzle 50. In this state, the reciprocator 40 slowly retreats along the rail 42 and pulls out the powder coating gun 41 to the outside of the booth 43.
At this time, since the compressed air is ejected from each air nozzle 50, the powder coating adhered to the gun mounting jig and the gun body is blown off and removed.

The reciprocator 40 is not limited to the vertically movable type shown in the figure, but in addition to this, the reciprocating type or a plate-shaped object to be coated is conveyed by a conveyor below the booth and above it. It is also applicable to a type in which a powder coating gun placed toward the coated object is moved back and forth or left and right.

[0023]

As described above, the powder coating gun according to the present invention is connected to the gun body and the rear end of the gun body to support the gun body and to be connected to the gun body. Since the pipe-shaped gun mounting jig through which the paint hose and the air hose are passed is provided, the outer surface of the powder coating gun can be easily cleaned. If the outer peripheral portion of the connecting portion between the gun body and the gun mounting jig is covered with a cover member, cleaning becomes easier. Also, if the attachment member is fixed to the tip of the gun mounting jig and detachably connected to the rear end of the gun body, the powder coating gun mounted on the gun mounting jig can be easily replaced. It will be possible.

The powder coating gun cleaning apparatus according to the present invention has a plurality of nozzle holes radially arranged in a plane perpendicular to the axial direction of the powder coating gun and surrounding the outer periphery of the powder coating gun. And a moving means for moving the cleaning jig and the powder coating gun relative to each other along the axial direction of the powder coating gun, and the cleaning jig and the powder coating gun are moved by the moving means. Since the compressed air is blown toward the powder coating gun from the plurality of nozzle holes of the cleaning jig while relatively moving the gun, the powder coating gun can be easily and efficiently cleaned.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a configuration of a powder coating gun according to an embodiment of the present invention.

FIG. 2 is a view showing a powder coating gun according to another embodiment.

FIG. 3 is a diagram showing a powder coating gun cleaning apparatus according to an embodiment of the present invention.

4 is a cross-sectional view showing a main part of the cleaning device of FIG.

FIG. 5 is a side view showing a cleaning device according to another embodiment.

FIG. 6 is a plan view showing the cleaning device of FIG.

FIG. 7 is a front view showing a main part of the cleaning device of FIG.

FIG. 8 is a side view showing a conventional powder coating gun.

[Explanation of symbols]

 11, 21 Gun body 12,22 Paint hose 13,23 Air hose 14,24 Gun cable 15,25 Gun mounting jig 17 Cover member 28 Attachment member 30,40 Reciprocator 31,46 Cleaning jig 31a Nozzle hole 33 Air cylinder 41 Powder coating gun 48 Moving device 49 Air piping 50 Air nozzle

Claims (6)

[Claims] 1. A powder coating gun for injecting powder coating material onto an object to be coated, comprising: a gun body, a gun body connected to a rear end of the gun body to support the gun body, and to be connected to the gun body. A powder coating gun, comprising: a gun cable, a paint hose, and a pipe-shaped gun mounting jig through which an air hose is passed. 2. The powder coating gun according to claim 1, further comprising a cover member that covers an outer peripheral portion of a connecting portion between the gun body and the gun mounting jig. 3. The powder according to claim 1, further comprising an attachment member that is fixed to a front end portion of the gun mounting jig and is detachably connected to a rear end portion of the gun body. Painting gun. 4. A cleaning device for cleaning the outer surface of the powder coating gun according to claim 1, wherein the cleaning device is radial so as to surround the outer periphery of the powder coating gun in a plane perpendicular to the axial direction of the powder coating gun. A cleaning jig having a plurality of nozzle holes arranged in, and a moving means for moving the cleaning jig and the powder coating gun relative to each other along the axial direction of the powder coating gun,
Compressed air is blown toward the powder coating gun from a plurality of nozzle holes of the cleaning jig while moving the cleaning jig and the powder coating gun relatively by the moving means. Cleaning equipment for powder coating gun. 5. The cleaning device according to claim 4, wherein the moving unit moves the cleaning jig along the axial direction of the powder coating gun. 6. The cleaning device according to claim 4, wherein the moving means moves the powder coating gun along an axial direction thereof.