JPH0653240B2 - Paint gun cleaning equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a coating gun cleaning device, and more specifically, after spraying a solvent or the like from a plurality of cleaning nozzle members in a cleaning tank to remove paint adhered to the coating gun. , By retracting the cleaning nozzle member from the cleaning tank and injecting compressed air to the coating gun outside the cleaning tank to dry the coating gun, so that the solvent, paint, etc. are re-applied to the coating gun. The present invention relates to a cleaning device for a coating gun, which prevents the adhesion of the coating gun, thereby reliably and automatically cleaning the coating gun.

Generally, in the automobile industry, a coating apparatus is used for coating the outer panel portion of an automobile body, and in this case, the coating apparatus has been automated to correspond to a line production process. Usually, the automatic coating device has a plurality of coating guns, and a predetermined coating is sprayed from the plurality of coating guns while relatively moving the vehicle body to be coated and the coating device. It is configured to automatically paint the car body.

By the way, when the coating work is continuously performed on the automobile body, the paint sprayed from each coating gun often adheres to the tip of the coating gun, that is, the nozzle portion. When the coating material adheres to the nozzle portion, the coating material solidifies and closes the nozzle portion, which may make it impossible to spray the coating material when performing a new coating operation.

Therefore, conventionally, an operator cleans each nozzle portion with a brush to which a solvent such as thinner is attached before starting the painting work and after finishing the painting work, and further attaches it to the nozzle portion with a cloth or the like. The coating gun is cleaned by wiping off the remaining solvent.

However, as described above, since the cleaning work of the coating gun is performed manually by the operator, particularly in the case where a large number of coating guns are mounted as in the aforementioned automatic coating device,
It takes a considerable time to clean the coating gun,
The inconvenience of imposing a considerable burden on the worker is exposed.

For this reason, various cleaning devices have been adopted to automatically perform the cleaning work of the coating gun, and the technical idea thereof is disclosed in, for example, Japanese Patent Laid-Open No. 59-127671. This is shown in FIG.

In FIG. 1, reference numeral 2 indicates a cleaning device, and the cleaning device 2 includes a shield 3. A cover 4 is attached to the upper portion of the shield 3, and a hole 4a is formed in the center of the cover 4. Further, the first discharge pipes 6a and 6b for the cleaning fluid are arranged in the shield 3 so as to face each other, and the first discharge pipes 6a and 6b face each other at positions displaced by 90 °. Second discharge pipes 7a, 7b for the dry fluid are provided.

In such a configuration, the coating gun 8 is made to enter the inside of the shield 3 from the hole 4a of the cover 4, and is directed toward the nozzles 8a and 8b of the coating gun 8 and firstly the first discharge pipe 6
A mixed fluid of a cleaning solvent such as thinner and air is jetted from a and 6b to remove the paint adhering to the nozzle portions 8a and 8b. Next, compressed air is jetted from the second discharge pipes 7a and 7b to remove or evaporate the solvent remaining in the nozzle portions 8a and 8b, and the cleaning operation of the nozzle portions 8a and 8b is automatically performed. There is.

However, in the above-mentioned conventional technique, the first discharge pipes 6a, 6
When spraying the solvent from b, the solvent and the nozzle portion 8a,
There is a risk that the paint that has adhered to 8b may adhere to the second discharge pipes 7a and 7b. Therefore, when the compressed air is jetted from the second discharge pipes 7a, 7b to dry the nozzles 8a, 8b, the solvent or paint adhering to the second discharge pipes 7a, 7b is removed again by the nozzles 8a, 7b. It will be scattered to the 8b side,
This causes the inconvenience that the cleaning work of the coating gun 8 is not performed effectively. That is, if the coating operation is performed through the coating gun 8 in which the solvent and the coating material remain, the solvent is mixed in the coating material sprayed from the coating gun 8 and a coating failure occurs, or the solvent adheres to the nozzle portions 8a and 8b. The exposed coating material is solidified, and the coating material cannot be properly sprayed from the nozzle portions 8a and 8b.

The present invention has been made in order to overcome the above-mentioned inconvenience, and a coating gun is made to face a cleaning tank in which a plurality of cleaning nozzle members are arranged, and a solvent or the like is sprayed from the nozzle member to spray the coating gun. After removing the paint adhering to the coating gun, the coating gun and the cleaning tank are displaced relative to each other, and then compressed air is jetted to the coating gun from an air jet nozzle mounted outside the washing tank. By drying the coating gun, it prevents the solvent and paint from adhering to the air injection nozzle during cleaning of the coating gun to ensure the cleaning work of the coating gun, and therefore an efficient automatic cleaning work. It is an object of the present invention to provide a cleaning device for a coating gun that enables the above.

In order to achieve the above-mentioned object, the present invention provides a cleaning tank in which a coating gun is inserted, and a cleaning tank which is disposed in the cleaning tank and which sprays a cleaning fluid to the coating gun to clean the coating gun. In a coating gun cleaning device including a nozzle member, a drying nozzle member for ejecting a compressed gas to the coating gun to remove the cleaning fluid adhering to the coating gun is provided outside the cleaning tank. The drying nozzle member is inclined toward the coating gun and inclined toward the cleaning tank, and has a gas ejection port for ejecting the compressed gas.

A preferred embodiment of a coating gun cleaning apparatus according to the present invention will now be described in detail with reference to the accompanying drawings.

In FIG. 2, reference numeral 10 indicates a coating line of an automobile, and the coating line 10 is divided into a first stage 10a, a second stage 10b, a third stage 10c and a fourth stage 10d according to a work process. Be divided. In this case, the cleaning device 12 according to the present invention is arranged on the third stage 10c.

At the first stage 10a, the engine room and the trunk room of the vehicle body 14 are painted. That is, rail portions 16a and 16b are arranged on both sides of the first stage 10a, and coating robots 18a to 18d are movably arranged on these rail portions 16a and 16b. A bonnet opening / closing mechanism 20 and a trunk opening / closing mechanism 22 are arranged on the first stage 10a. A vehicle body transport mechanism 24 is provided at the center of the coating line 10 from the first stage 10a to the fourth stage 10d.

At the second stage 10b, the inner surface of the door of the vehicle body 14 is painted. In this case, rail portions 26a and 26b are arranged on both sides of the second stage 10b, and these rail portions 26a and 26b are provided.
Painting robots 28a and 28b are movably arranged in the. Further, rail portions 30a and 30b are further arranged between the vehicle body transport mechanism 24 and the rail portions 26a and 26b.
Door opening / closing mechanisms 32a and 32b are movably arranged on a and 30b.

Next, in the third stage 10c provided with the cleaning device 12 according to the present invention, the vehicle body 14 is passed through the coating device 34 provided therein.
The outer panels, including the hood, trunk cover, roof and doors, will be painted. And the 4th stage 10d
Then, the drying process of the vehicle body 14 that has been painted is performed. In the first to third stages to 3rd to 10a to 10c, static electricity is applied to the paint to electrostatically coat the vehicle body 14, which is the object to be coated.

Therefore, in FIG. 2 and FIG. 3, the coating device 34 includes a rail portion 35 which is arranged in parallel on both sides of the vehicle body transport mechanism 24.
It is basically composed of a and 35b, an upper painting mechanism 36 and a left side painting mechanism 38 that run along the rail portion 35a, and a right side painting mechanism 40 that runs along the rail portion 35b.

The upper coating mechanism 36 includes a casing 42, and a turning arm 44 is supported by the casing 42. In this case, the revolving arm 44 is configured to be vertically displaceable and rotatable about the revolving shaft 46. further,
A horizontal gun arm 48 is held at the end of the swivel arm 44, and the horizontal gun arm 48 is displaceable in the horizontal direction by engaging with a cylinder (not shown) provided in the swivel arm 44. Gun support bars 50a to 50d are held on the horizontal gun arm 48 at predetermined intervals so as to be perpendicular to the horizontal gun arm 48. And gun support bar 50a
The coating guns 52a to 52d are attached to the lower ends of the to 50d in a state of being separated from each other by a predetermined distance. Note that the coating guns 52a to 5
Nozzles 54a to 54d are provided on the tip side of 2d.

The left side painting mechanism 38 and the right side painting mechanism 40 are for painting the left side portion and the right side portion of the vehicle body 14, and are basically configured the same. Therefore, the left side coating mechanism 38 will be described in detail below, and the detailed description of the right side coating mechanism 40 will be omitted.

That is, the left side coating mechanism 38 includes a casing 56, and the gun arm 58 is vertically and horizontally displaceable under the action of an actuator (not shown) provided in the casing 56, and the side surface of the vehicle body 14 and a side portion which will be described later are coated. It is configured so that it can be rocked by a tube with a gun cleaning mechanism. Gun arm 58
The coating guns 60a to 60d are attached to each other in a state of being separated from each other by a predetermined distance. In this case, the coating guns 60a, 60b and 60d are configured to be swingable. The coating gun 60c is fixed with its tip oriented horizontally.

Next, the cleaning device 12 according to the present invention will be described in detail below.

As shown in FIG. 2 and FIG. 4, the cleaning device 12 is
Basically, the upper coating gun cleaning mechanism 62 for cleaning the coating guns 52a to 52d constituting the upper coating mechanism 36, and the respective coating guns 60a to 60a constituting the left side coating mechanism 38 and the right side coating mechanism 40 are cleaned. Includes side painting gun cleaning mechanisms 64, 66 for cleaning 60d.

In FIG. 4, the cleaning mechanism 62 for the upper painting gun is a base.
A main body 70 including a base 68 is provided on the base 68 so as to be vertically movable and rotatable. A supporting rod 72 is provided on the upper portion of the main body 70.
One ends of a and 72b are engaged with each other, and the rod bodies 72a and 72b extend in parallel in the horizontal direction. And the rods 72a, 7
The cleaning tanks 74a to 74d are supported by 2b, and the cleaning tanks 74a to 74d are
The spacing 4d is selected according to the coating guns 52a to 52d of the upper coating mechanism 36. In this case, the cleaning tanks 74a to 74d have the same structure, and the cleaning tank 7a
4a will be described in detail below, and detailed description of the other cleaning tanks 74b to 74d will be omitted.

That is, as shown in FIG. 5, a base plate 76 forming the cleaning tank 74a is engaged with the rods 72a and 72b, respectively, and is supported to suspend the cleaning tank 74a on the rods 72a and 72b. Members 78a to 78d are provided. A circular opening 80 having a relatively large diameter is formed in the center of the base plate 76, and holes 84a and 84b are formed in the base plate 76 on both sides of the opening 80.

Therefore, flexible cover members 86a and 86b facing the opening 80 are fixed to the base plate 76. The flexible cover members 86a and 86b are configured in the same shape, and have hole portions 88a and 88b having a diameter smaller than the diameter of the nozzle portions 54a to 54d of the coating guns 52a to 52d, respectively, formed in the central portions thereof. A plurality of slits (not shown) are formed so as to be directed outward in the radial direction from the centers of the hole portions 88a and 88b and separated by a predetermined distance. Then, the flexible cover members 86a and 86b are superposed and fixed to the base plate 76 so that the respective slits do not overlap.

Therefore, a plurality of support bars 90 are erected at equal intervals so as to surround the opening 80 on the surface portion of the base plate 76 on which the support members 78a to 78d are provided, and each of the support bars 90 has an air blow nozzle member. Put on 92. In this case, the tip of each nozzle member 92 is directed toward the center line of the opening 80 and is inclined toward the opening 80.

On the other hand, on the surface portion of the base plate 76 opposite to the surface portion on which the nozzle member 92 is provided, as shown in FIG.
Support bars 94a to 94d are equally spaced to surround 80.
One end is fixed, and the cleaning guns 96a to 96d are attached to the other ends of the support bars 94a to 94d. At this time, the nozzle tips 98a to 98d of the cleaning guns 96a to 96d are inclined toward the base plate 76 side and are oriented toward the center line of the opening 80. A support bar 100 is provided between the support bars 94c and 94d, and a support bar 102 is attached to an end of the support bar 100 in a direction orthogonal to the support bar 102.
The cleaning gun 104 is attached to 02.

As shown in FIG. 7, the cleaning gun 104 has a rectangular main body 106.
And a nozzle tip portion 108 that bulges outward from an intermediate portion of the main body portion 106. A solvent supply first port 110a and an air supply second port 11 are provided at both ends of the body 106, respectively.
0b are formed, and the respective ports 110a, 110b communicate with the first and second passages 112a, 112b. On the other hand, the tip of the nozzle
Reference numeral 108 includes a first nozzle 114a having a small diameter and a second nozzle 114b coaxial with and surrounding the first nozzle 114a, the first nozzle 114a communicating with the first passage 112a, and the second nozzle 114a. The nozzle 114b communicates with the second passage 112b.

The other cleaning guns 96a to 96d are the cleaning guns 104 described above.
The configuration is the same as the above, and its detailed description is omitted.

Therefore, the first port 110a of the cleaning gun 104 and the cleaning gun 9
One end of the first conduits 116 and 118a to 118d is connected to a pair of ports (not shown) of 6a to 96d, and the first conduits 116 and 1 are connected.
A pipe 120 is connected to the other end of 18a to 118d, the pipe 120 is inserted into the hole 84b of the base plate 76, and then connected to a solvent supply not shown. Further, the second pipes 122 and 124a to 124d are connected to the second port 110b of the cleaning gun 104 and the other ports (not shown) of the cleaning guns 96a to 96d, and the second pipes 122, 124a to 124d are integrated. Conduit 1
The pipe 126 is connected to an air supply source (not shown) by exposing the pipe 126 to the outside through the hole 84a.

Next, the casing 128 is detachably attached to the base plate 76 via, for example, bolts. A cleaning work chamber 136 is defined in the casing 128, and the chamber 13
6 communicates with the outlet 138 for the waste liquid and mist having a small diameter at the end of the casing 128.

An outlet for the cleaning tanks 74a to 74d configured in this way
A pipe line 140 is integrally connected to 138, and the pipe line 140 is attached to a main body portion 70 so as to be vertically moved and rotated integrally with the main body portion 70. Further, one end of the flexible conduit 142 is connected to the conduit 140, and the other end of the conduit 142 is connected to the separation tank 144. A pipe line 146 for mist is provided on the upper side of the separation tank 144, and a pipe line 148 for waste liquid is arranged on the lower side thereof to form the pipe line 148, for example, a pump 150.
To a waste liquid treatment unit (not shown).

On the other hand, the side coating gun cleaning mechanisms 64 and 66 have the same structure. The cleaning mechanism 64 will be described in detail below, and the detailed description of the other cleaning mechanism 66 will be omitted.

That is, the cleaning mechanism 64 includes a base 152, and the base 1
A column 154 is erected on 52. Holding members 156a to 156d extending in the horizontal direction are provided on the columns 154 at predetermined height positions, respectively, and the cleaning tank 15 is provided via the holding members 156a to 156d.
8a to 158d make up the left side painting mechanism 38 Painting gun 60a
It is installed corresponding to 60d. The cleaning tanks 158b and 158d
And are fixed to the holding members 156b and 156d.
158a and 158c are configured to be horizontally displaceable. That is, the cleaning tank shift cylinders 160a and 160b are horizontally attached to the support column 154 and are attached at predetermined intervals, and the cleaning tank is connected to the cylinder rods 162a and 162b extending horizontally from the cylinders 160a and 160b. 158a and 158c are attached.

Therefore, the cleaning tanks 158a to 158d have substantially the same structure as the above-described cleaning tank 74a. In this case, the cleaning tank 15
Supporting members 166a to 166d are provided on the upper side of the casing 164 constituting 8a to 158d, and the holding members 156b and 156d and the cylinder rods 162a and 16d are provided via the supporting members 166a to 166d.
Suspended on 2b. Since the internal structures of the cleaning tanks 158a to 158d are the same as the cleaning tank 74a described above, detailed description thereof will be omitted.

Further, a casing 164 that constitutes the cleaning tanks 158a to 158d.
To the lower part of the pipe, a waste liquid and mist recovery pipe line 168 is connected, and each pipe line 168 is connected to a separation tank 172 via the pipe line 170, and like the separation tank 144 described above, this separation tank 172 is connected.
The mist pipe 174 and the waste liquid pipe 176 are connected to each other.

The cleaning apparatus according to the present invention is basically configured as described above, and its operation and effect will be described next.

First, the vehicle body 14 transported to the first stage 10a by the vehicle body transport mechanism 24 has its bonnet opened by the bonnet opening / closing mechanism 20 and its trunk bar opened by the trunk opening / closing mechanism 22, and is painted along the rail portions 16a, 16b. The robots 18a to 18d paint the engine room and the trunk room. Then, the vehicle body 14 whose bonnet and trunk cover are closed by the bonnet opening / closing mechanism 20 and the trunk opening / closing mechanism 22 is transported to the second stage 10b by the vehicle body transporting mechanism 24.

In the second stage 10b, the door of the vehicle body 14 is the door opening / closing mechanism 32a,
32b is opened, the inner surface of the door is a rail portion 26a,
It is painted by painting robots 28a, 28b that run along 26b. Then, the vehicle body 14 whose doors are closed by the door opening / closing mechanisms 32a and 32b is transferred to the third stage by the vehicle body transport mechanism 24.
It is transported to 10c.

Therefore, the painting gun 52 mounted on the upper painting mechanism 36 in advance
The a to 52d are arranged so as to face the front panel of the vehicle body 14, and the coating guns 60a to 60d mounted on the two side coating mechanisms 38 and 40 are positioned corresponding to the side shape of the vehicle body 14. deep. Then, install the upper coating mechanism 36 on the rail 35a.
Along the direction of arrow C,
Of the vehicle body 14 by displacing the vertical direction and rotating the rotary shaft 46 around the coating guns 52a to 52d.
Apply striped coating on top of.

On the other hand, the side coating mechanisms 38 and 40 are displaced along the rails 35a and 35b at a predetermined distance from the upper coating mechanism 36, and the coating arms 60a to 60d are displaced while the gun arm 58 is displaced in the horizontal direction. Paint is sprayed from the side surface of the vehicle body 14 to form a stripe pattern.

Next, while displacing the gun arm 58 by a predetermined amount in the vertical direction and setting the angular positions of the coating guns 60a to 60d, the side coating mechanisms 38, 40 are moved in the opposite direction along the rail portions 35a, 35b. Displace. At this time, the coating material sprayed from the coating guns 60a to 60d is sprayed on the portion to be coated on the side portion of the vehicle body 14, and the entire side portion of the vehicle body 14 is coated.

Further, in the upper painting mechanism 36, the horizontal gun arm 48 is horizontally displaced by a predetermined amount, and the upper painting mechanism 36 is displaced along the rail portion 35a in the opposite direction to the opposite direction to the vehicle body through the painting guns 52a to 52d. The paint is sprayed onto the portion to be painted above 14 to complete the painting work on the entire outer surface of the vehicle body 14.

In this way, the vehicle body 14 after the painting work is transported by the vehicle body transport mechanism.
After being conveyed to the fourth stage 10d via 24, a drying process is performed.

Therefore, after finishing the painting work of the vehicle body 14 in the painting line 10 or before starting the painting work of the vehicle body 14, the respective painting guns 52 through the cleaning device 12 according to the present invention are used.
The cleaning work of a to 52d and 60a to 60d is performed.

That is, the upper coating gun cleaning mechanism 62 constituting the coating apparatus 12 is arranged so as to be parallel to the rail portion 35b as shown in FIG. The cleaning mechanism 62 is prevented from interfering with each other during the painting work of 14. And the painting guns 52a-5
When performing the cleaning operation of 2d, after the main body portion 70 is displaced vertically upward, the main body portion 70 is rotationally displaced in the arrow direction under the driving action of a rotary drive source (not shown) to move the rod body 72a, Position 72b parallel to horizontal gun arm 48, which
The respective cleaning tanks 74a to 74d are moved to predetermined cleaning positions (see FIGS. 2 and 4).

Next, the swivel arm 44 is displaced vertically downward to move the nozzles 54a to 54d of the coating guns 52a to 52d to the cleaning tanks 74a to 74d.
Show inside. In this case, as shown in FIG. 5, the nozzle portion 54a of the coating gun 52a enters into the holes 88a and 88b of the flexible cover members 86a and 86b which are attached to the base plate 76 which constitutes the cleaning tank 74a. To do. At that time, the holes 88a and 88b are formed to have a diameter smaller than that of the nozzle 54a, and the slits (not shown) communicating with the holes 88a and 88b are arranged so as not to overlap each other. It is possible to completely close the upper side of the chamber 136 in the casing 128 via the nozzle portion 54a.

Further, a solvent such as thinner is supplied to the pipe 120 from a solvent supply source (not shown), and compressed air is supplied to the pipe 126 from a compressed air supply source (not shown). Therefore, the solvent is supplied from the conduits 116 and 118a to 118d through the conduit 120 to the first port 110a of the cleaning gun 104 and the cleaning guns 96aa to 96d.
The compressed air is supplied to one of the ports (not shown) of the cleaning gun 104 from the conduits 122 and 124a to 124d.
It is supplied to the port 110b and the other ports (not shown) of the cleaning guns 96a to 96d.

In FIG. 7, the solvent delivered to the first port 110a of the cleaning gun 104 passes through the first passage 112a and the first nozzle 11 having a small diameter.
4a to the outside, while the second of the cleaning gun 104
The compressed air that has reached the second passage 112b from the port 110b is jetted out from the second nozzle 114b. Therefore, each nozzle
The solvent and the compressed air discharged from 114a and 114b are mixed and supplied to the nozzle portion 54a of the coating gun 52a, and the nozzle portion 54a is cleaned. At that time, the other cleaning gun 9
Similarly in 6a to 96d, a mixed fluid of a solvent such as thinner and compressed air is jetted from the respective nozzle tips 98a to 98d, and the nozzles of the coating gun 52a to which the nozzle tips 98a to 98d are directed. The cleaning work of the portion 54a is accomplished.

In this case, the upper part of the chamber 136, that is, the nozzle part 5
Since the end portion where 4a enters is closed by the flexible cover members 86a and 86b, the mixed fluid sprayed from the cleaning guns 96a to 96d and 104 does not flow out to the outside, and particularly contains a large amount of thinner. It is possible to avoid the inconvenience that the mist that invades into the workplace and adversely affects the health of the worker.

In this way, when the nozzle portion 54a of the coating gun 52a is cleaned, the paint containing the fluid sprayed from the cleaning guns 96a to 96d and 104, that is, the waste liquid and the mist, is taken out at the outlet 138 provided in the lower part of the casing 128. Through conduit 140
And it is led to the separation tank 144 from the pipe 142. The separation tank
In 144, the mist is sent to a mist treatment unit (not shown) via a pipe 146, while the waste liquid is sent to a waste liquid treatment unit (not shown) under the action of a pump 150 via a pipe 148. Will be done. Therefore, there is an advantage that the waste liquid and the mist do not flow out into the work place, and the environment in the work place can be favorably secured.

Next, the revolving arm 44 is raised to remove the coating gun 52a from the cleaning tank 74a (see the double-dotted line in FIG. 5). Further, from the nozzle member 92 to the nozzle portion 54 through the illustrated conduit.
If compressed air is jetted to a, the solvent adhering to the nozzle portion 54a is scattered or evaporated, and the cleaning operation of the nozzle portion 54a is completed.

Although the cleaning work process of the coating gun 52a has been described in detail above, it will be easily understood that the same applies to the other coating guns 52b to 52d. On the other hand, both sides coating mechanism
The painting work of the painting guns 60a to 60d constituting the parts 38 and 40 will be described in detail below.

That is, in the side coating gun cleaning mechanism 64, the cylinder rods 162a and 162b are driven by the cylinders 160a and 160b.
Is displaced in the horizontal direction, and the cleaning tanks 158a and 158c held therein are positioned corresponding to the positions of the coating guns 60a and 60c. Meanwhile, painting guns 60a, 60b and 60d
Are oscillated and displaced so that the respective tip portions are oriented in the horizontal direction and positioned (see the chain double-dashed line in FIG. 3). Further, the gun arm 58 is pivotally displaced from the side portion of the vehicle body 14 to the side coating gun cleaning mechanism 64 side, and the coating guns 60a to 60d are respectively washed.
Face 158a to 158d.

Therefore, when the left side coating mechanism 38 is displaced toward the cleaning mechanism 64 side along the rail portion 35a, the respective coating guns 60a to 60d make their leading ends enter the cleaning tanks 158a to 158d. Next, as in the case of the above-mentioned cleaning tank 74a, the coating guns 60a to 60d which are in the respective cleaning tanks 158a to 158d.
It is sufficient to wash the nozzle portion of.

It should be noted that each of the coating guns 60a constituting the right side coating mechanism 40
Similarly, 60 to 60d are automatically cleaned by the side coating gun cleaning mechanism 66.

In this case, according to the invention, the respective coating guns 52a to 52d are
Further, it is possible to automatically and surely wash 60a to 60d to avoid the inconvenience that the paint, the solvent or the like remains on them.

That is, as described above in FIG. 5, the casing
The cleaning guns 96a to 9 are provided in the cleaning work chamber 136 defined in 128.
6d and 104 are arranged, while the air blow nozzle member 9
2 is provided outside the chamber 136. Therefore, first, when the nozzle portion 54a of the coating gun 52a is introduced into the chamber 136, and when the cleaning fluid is mixed with solvent and air from the cleaning guns 96a to 96d and 104 to clean the nozzle portion 54a. The solvent that scatters in the chamber 136, or the paint or the like that has adhered to the nozzle portion 54a is not discharged to the outside while the flexible cover members 86a and 86b are closed. Therefore, it is possible to prevent the solvent, the paint or the like from adhering to the nozzle member 92. Then, the coating gun 52a is removed from the chamber 136,
When the compressed air is jetted from the nozzle member 92 to the nozzle portion 54a, the solvent remaining in the nozzle portion 54a is scattered or evaporated to effectively perform the cleaning work.

As a result, the nozzle portion 54a is reliably cleaned without the solvent or paint adhering to it, and when the vehicle body 14 is painted again by the coating gun 52a, the desired paint can be accurately and satisfactorily applied to the vehicle body 14. It is possible to inject, and it is possible to avoid painting defects and perform the painting work of the vehicle body 14 with high precision.

As described above, according to the present invention, after cleaning the coating gun by injecting a solvent or the like from a plurality of coating guns in the cleaning tank,
Compressed air is jetted from the nozzle member to the coating gun outside the cleaning tank to evaporate or remove the solvent remaining in the coating gun. For this reason, the solvent sprayed from the cleaning gun during the cleaning operation or the paint that has adhered to the coating gun does not adhere to the nozzle member, and is re-applied to the coating gun through the compressed air drawn from the nozzle member. This painting gun can be cleaned automatically and surely while avoiding the inconvenience that paint or the like adheres. Therefore, it becomes possible to satisfactorily carry out a new painting work process with the washed paint gun, and the painting line system including the painting work and the washing work is fully automated to perform extremely efficient painting work. The advantage of being able to do is obtained.

Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the scope of the present invention. Of course.

[Brief description of drawings]

FIG. 1 is a perspective view of a conventional cleaning device, FIG. 2 is a schematic configuration diagram of a coating line system incorporating the cleaning device of the present invention, and FIG. 3 is a coating device cleaned by the cleaning device of the present invention. FIG. 4 is a partially omitted side view showing an arrangement state of the cleaning device according to the present invention, FIG. 5 is a longitudinal sectional view of a cleaning tank constituting the cleaning device according to the present invention, and FIG. 5 is a sectional view taken along the line VI-VI in FIG. 5, and FIG. 7 is a partially omitted vertical sectional view of the cleaning gun constituting the cleaning apparatus according to the present invention. 10 …… Coating line, 12 …… Cleaning device 14 …… Car body, 34 …… Coating device 36 …… Top coating mechanism, 38,40 …… Side coating mechanism 62,64,66 …… Cleaning mechanism, 70 …… Main body 74a to 74d …… Washing tank, 76 …… Base plate 84a, 84b …… Hole, 92a, 92b …… Nozzle 96a to 96d …… Cleaning gun 98a to 98d …… Nozzle tip 104 …… Cleaning gun, 128 ...... Casing 138 ...... Ejection port

Claims (1)

[Claims] 1. A coating gun including a cleaning tank in which a coating gun is inserted, and a cleaning nozzle member disposed in the cleaning tank for spraying a cleaning fluid onto the coating gun to clean the coating gun. In the cleaning device, a drying nozzle member for injecting a compressed gas to the coating gun to remove the cleaning fluid adhering to the coating gun is disposed outside the cleaning tank, and the drying nozzle member is A coating gun cleaning device, characterized in that it has a gas ejection port for ejecting the compressed gas, which is inclined toward the coating gun and toward the cleaning tank side.