JP2914762B2 - Painting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray painting work area in which painting equipment is installed, a ceiling outlet for blowing ventilation air downward from almost the entire ceiling, and an exhaust for discharging air in the area from the floor. The present invention relates to a coating facility having a mouth.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, in a spray coating work area 3, an area 3A in which a coating apparatus 5 is installed and an area 3B in which an object 1 is arranged, at different blowing speeds V1, V2. The ceiling outlet 7 is divided into two types of parts 7A and 7B so as to blow out the ventilation air A1 and A2, or one is simply provided for each of the coating equipment installation area 3A and the workpiece placement area 3B. Anyway those as blowing ventilation air from the ceiling blower opening 7 as generally
In general, the coating equipment installation area 3A and the workpiece placement area 3B are completely open spaces.

[0003]

However, the ventilation air A1 and A2 blown to each of the coating equipment installation area 3A and the workpiece placement area 3B are mixed at the boundary between the two areas 3A and 3B. Further, the mixing area M of the ventilation air A1 and A2 expands toward the bottom side, and in such mixing, floating paint mist generated in the coating object arrangement area 3B by spray coating on the coating object 1 causes the coating equipment installation area. There is a problem that a large amount of 3A penetrates and deposits on the installation coating equipment 5.

After the paint deposited on the coating equipment 5 is dried, it peels off and scatters and re-adheres to the workpiece 1, thereby causing a drastic decrease in coating quality. In order to prevent the coating quality from deteriorating due to re-adhesion, frequent cleaning work was required after the painting work was stopped.

[0005] In order to address this problem, spraying
Coating equipment installation area and workpiece placement area in coating work area
A vertical wall extending downward from the ceiling is provided between
Ventilation air blown out to each area by wall partition function
By moving the start point of mixing of cattle to the lower side,
In addition, due to the rectifying action of this vertical wall, both ventilation air
By suppressing the mixture itself, the ventilation air
We have also proposed one that reduces the width of the spread area.
(For example, Japanese Utility Model Publication No. 61-183163)
Report).

However, such a vertical wall is provided.
Even so, the floating paint mist attached to the vertical wall itself
Prevents deposits and intrusion into the coating equipment installation area
Floating paint mist that can not be completely removed and adheres to coating equipment is still
Exists, and again, these deposited paints dry out
Afterwards, coating quality due to peeling and scattering and adhering to the workpiece
In order to more reliably prevent the deterioration of
In order to further reduce the cleaning work for removing paint,
There is room for improvement.

An object of the present invention is to employ a hanging wall and the hanging wall.
To prevent the paint from peeling and scattering as described above.
Effectively prevent paint quality deterioration and clean
The point is that the work can be greatly reduced.

[0008]

In [SUMMARY OF (invention according to claim 1) The invention according to claim 1, blown in spray painting work area installed painting equipment, downward ventilation air from substantially the entire of the ceiling portion ceiling An outlet, and a vertical wall extending downward from a ceiling, between a coating equipment installation area and a workpiece placement area in the spray coating work area, for a configuration in which an exhaust port for discharging air in the area from the floor is provided. the provided, this
Apply a voltage of the same polarity as that of the floating paint mist to the vertical wall
Set up power supply means .

(Invention according to claim 2) In the invention according to claim 2, spraying with a coating device installed
In the painting work area, ventilate air from almost the entire ceiling.
Ceiling outlet that blows air downwards, and within the area from the floor
In contrast to the configuration in which an exhaust port for discharging air is provided ,
Coating equipment installation area and work area
Between the band is provided with vertical walls extending from the ceiling downwards, this
Form the surface of the vertical wall on the side of the object placement area on the vertical surface,
In addition, the surface of the coating equipment installation area side is located closer to the lower end,
It is formed on a convex curved surface located on the area side to cut the vertical wall.
The surface shape is made into an airfoil shape with a pointed lower end.

[0010] (Invention according to claim 3 ) In the invention according to claim 3, spraying with a coating device installed
In the painting work area, ventilate air from almost the entire ceiling.
Ceiling outlet that blows air downwards, and within the area from the floor
In contrast to the configuration in which an exhaust port for discharging air is provided ,
Coating equipment installation area and work area
Between the band is provided with vertical walls extending from the ceiling downwards, this
Apply a voltage of the same polarity as that of the floating paint mist to the vertical wall
Provided with a power means for, be coated in this vertical wall
Make the surface on the object placement area side a vertical surface, and
The lower side of the surface on the placement area side is located closer to the area where the object is placed
Formed on a convex curved surface, the vertical wall has a cross-sectional shape
Make the airfoil shape.

[0011]

[Action] In the invention according to claim 1 (effect of the invention according to claim 1), as described above, it was blown into the ventilation air and the article to be coated arranged areas blown out from the ceiling blower opening painting equipment installation area ventilation by starting point mixes with air is due to the lower side by a partition function of the vertical wall, and each zone
The rectifying effect of the vertical wall on each of the ventilated air blown to the outside suppresses the mixture itself of both ventilated air.
Air-mixed area down to the bottom
The width of the area (in other words, the air
The degree of penetration into the coating equipment installation area) is
As a result, the boundary between the coating equipment installation area and the workpiece placement area
From the area where the substrate is placed due to the mixing of ventilation air in the area
Floating paint mist is prevented from entering the coating equipment installation area.
This prevents paint mist from adhering to the installed coating equipment.

[0012] Also, paint mistakes sprayed on the vertical wall
By applying a voltage of the same polarity as the charging polarity of the
Floating paint mist on the vertical wall itself with repulsion
Can also be prevented very effectively.

(Operation of the Invention According to Claim 2) In the invention according to claim 2, similar to the invention according to claim 1,
The width of the area where the ventilation air mixes with the vertical wall
The floating paint mist to the coating equipment installation area.
Deter entry.

In addition, in addition to the above, the coating
The surface on the side of the storage area is formed in a vertical plane, and
Ventilation air blown out to the painted area is directed vertically downward
While the vertical wall facing the coating equipment installation area
Close the lower end to the convex curved surface located closer to the substrate
By doing so, the Coanda effect that occurs on the convex curved surface
Use both ventilation air to the area where the coating equipment is installed.
At the border of the area, it tends to overhang the area where the object is located
In addition, each surface of the vertical wall can be
To form a vertical wall cross-sectional shape
Vortex caused by air separation at the lower end of the vertical wall
Life can be effectively suppressed, and the generation of such eddies
If the mixing of ventilation air at the border of both areas is promoted
Can be avoided, and from these, as described above,
To reduce the spread width of the area where the ventilation air is mixed
With the synergistic effect of installing coating equipment from the work area
More effectively deters floating paint mist from entering the area
Wear.

(Operation of the Invention According to Claim 3) The invention according to claim 3 is the same as the invention according to claims 1 and 2.
The deployment of the vertical wall expands the area where the ventilation air is mixed.
Reduce the width of the paint, and make sure that there is no
Deter the intrusion of the project.

[0016] In addition to the above, the spray paint on the vertical wall
By applying a voltage of the same polarity as the mist charging polarity
As in the first aspect of the present invention,
Extremely effective adhesion of floating paint mist to the wall itself
Can be prevented, and the vertical
The surface should be vertical and the surface on the side of the coating equipment installation area should be
The lower end is shaped like a convex curved surface located closer to the substrate
The vertical wall into a wing-shaped shape with a pointed lower end.
As a result, similar to the second aspect of the present invention,
Ventilation air blows out to the area where
In addition to the tendency to overhang, airflow at the lower end of the vertical wall
Effectively preventing eddy currents caused by separation
The width of the area where air and ventilation air are mixed
With the effect of airborne paint on the installation area of coating equipment.
Strike intrusion can be more effectively suppressed.

[0017]

Effect of the Invention] (Effect of the invention according to claim 1) The invention according to claim 1, as described above, deployment of vertical wall
At the boundary between the work area and the coating equipment installation area
The width of the area where the ventilation air is mixed
To prevent paint mist from adhering to installed coating equipment.
Adhesion of floating paint mist to the vertical wall itself
Can be effectively prevented, it is simply made of plate material
Separation of deposited paint compared to equipment with only vertical walls
The paint quality can be more reliably prevented from falling due to splashing.
In addition, cleaning work to remove adhered paint is more effectively
Can be reduced.

(Effect of the invention according to claim 2 ) According to the invention according to claim 2, as described above, the coating equipment installation
The blow out ventilation air to置区range objects to be coated arranged area side
In addition to the tendency to overhang, eddy currents at the lower end of the vertical wall
This is effectively suppressed by mixing these with ventilation air.
Synergistic effect with reducing the width of the contact area
Effect the penetration of floating paint mist into the coating equipment installation area
The vertical wall made of mere plate material.
Paint mist for installed coating equipment compared to equipment that only has
Adhesion can be prevented more effectively, and in this regard,
More reliably prevent deterioration of coating quality due to peeling and scattering
Cleaning work to remove adhered paint
Can be reduced.

(Effect of Invention of Claim 3 ) According to the invention of claim 3, the same effect as the invention of claim 2 is obtained.
, Compared to equipment that simply has a vertical wall made of plate material
More effectively prevent paint mist from adhering to installed coating equipment
Can be stopped and, like the invention according to claim 1, the vertical wall itself
Adhesion of floating paint mist to the surface can be effectively prevented
As a result, coating quality is
Can be prevented more reliably and also remove paint deposits.
The cleaning work to be left can be reduced more effectively.

It should be noted that the inventions according to the respective claims have been implemented.
The ceiling outlet at a low speed relative to the coating equipment installation area.
High speed for the area that blows air and the area where workpieces are placed
If you adopt a configuration that partitions it into a part that blows out ventilation air,
Due to the downward high-speed flow of ventilation air in the work area,
Low speed in the area where the coating equipment is installed at the border between the two areas
There is a tendency to draw ventilation air to the area where the work is placed.
As a result, the coating equipment installation area
Floating paint mist can be more effectively prevented from entering
You.

Also, ventilation air blowing for the area where the article is to be coated is performed.
Faster pumping and replacement of coating equipment installation areas
By lowering the air blowing speed,
Coating with ventilated air outlet and exhaust from bottom exhaust
The function to discharge floating paint mist from the object placement area
Do not keep high with high ventilation airflow in the storage area.
In addition, the ventilation air blow to the coating equipment installation area
Ventilation space for the entire spray painting work area due to slowing down
The air supply can be reduced and the required ventilation power can also be reduced.
it can.

[0022]

Next, embodiments of the present invention will be described.

FIG. 1 shows a tunnel-shaped coating booth, which is equipped with a conveyor device 2 for transporting a workpiece 1, and a coating work area 3 in the bush is provided with a coating gun 4 with a coating gun 4. A painting robot 5 for spray painting is installed on both sides of the place where the article is placed.

The entire surface of the ceiling in the coating work area 3 is a ceiling outlet 7 for blowing the ventilation air supplied to the ceiling chamber 6 downward, while below the lattice floor 8,
An exhaust port 9 is provided for discharging the air inside the coating work area 3 together with the floating paint mist.

In the drawing, reference numeral 10 denotes a filter installed at the ceiling outlet 7, and reference numeral 11 denotes a paint mist during exhaust in the process of passing the washing water W and the exhaust from the washing water down pan 12 at a high speed in a combined state. Is a mist removal device that purifies exhaust gas by trapping water in cleaning water W.

A vertical wall 13 extending downward from the ceiling outlet 7 is provided between the robot installation area 3A located on both sides of the coating work area 3 and the workpiece placement area 3B located at the center in the coating work area 3. The ventilation air A1 blown out from the ceiling outlet 7 to the robot installation area 3A and the ventilation air A2 blown out to the workpiece placement area 3B are both areas 3A, 3B.
, And the mixing region M expands toward the bottom side with the partition wall function and the rectifying function of the vertical wall 13, whereby the object placement area 3 </ b> B is sprayed. To prevent the large amount of floating paint mist generated at step 3A from entering the robot installation area 3A due to the mixing of the ventilation air A1 and A2 at the boundary between the two areas 3A and 3B and adhering and depositing on the coating robot 5. It is.

The ceiling outlet 7 is provided with a ventilation flow rate A1 (for example, 0.2 V) to the robot installation area 3A by the airflow restriction partitioning structure 14 provided in the ceiling chamber 6.
m / s), and the ventilation air A2 is supplied to the portion 7A to be sprayed at a high speed V2 (for example, 0.4 m / s).
s), and is divided into a part 7B to be blown out, and the ventilation air flow velocity in the work placement area 3B is made high so that the floating paint mist discharge function from the work placement area 3B is maintained high, while the robot installation area is kept. By reducing the rate of ventilation air blowing to 3A, the amount of ventilation air supplied to the entire coating work area 3 is reduced, thereby reducing the required ventilation power.

Also, due to the downward high-speed flow of the ventilation air A2 in the article placement area 3B, the robot installation area 3A
At the boundary between the two areas 3A and 3B so as to be attracted to the object-arranged area 3B side, whereby the synergistic effect with the suppression of the mixing of the ventilation air by the vertical wall 13 is provided. Thus, the intrusion of the floating paint mist from the article-arranged area 3B to the robot-installed area 3A is more effectively prevented.

As shown in FIG. 2, the vertical wall 13 has a surface 13B on the side of the workpiece placement area 3B formed in a vertical plane and a surface 13A on the side of the robot installation area 3A closer to the lower end. It is formed on the convex curved surface located on the area 3B side, and is formed into a wing-shaped cross-sectional shape having a pointed lower end.
V. The ventilation air A2 blown out to B
While the vertical plane 13B on the B side guides vertically downward at the boundary between the two areas 3A, 3B, the ventilating ventilating the robot installation area 3A by the Coanda effect generated by the convex curved surface 13A on the robot installation area 3A side. Air A1
At the boundary between the two areas 3A and 3B toward the object-arranged area 3B, and the lower end of the vertical wall 13 has a pointed cross-sectional shape. The generation of floating paint mist from the coating object arrangement area 3B to the robot installation area 3A is prevented by suppressing the generation and avoiding the mixing of ventilation air at the boundary between the two areas due to the generation of the vortex. Is more effectively prevented.

In the present embodiment, when the paint is sprayed from the paint gun 4, the spray paint mist is charged by an electrode provided on the paint gun 4, and the spray paint mist is applied to the work 1 by electrostatic force. Painting is performed (for example, the spray paint mist is charged by an electrode of -10 KV, while the object to be coated 1 is grounded). On the other hand, the vertical wall 13 is provided. In this case, the vertical wall 13 made of aluminum or the like is attached to the ceiling frame 16 in an electrically insulated state via the insulator 15 and then sprayed on the vertical wall 13 by the power supply means 18 connected to the vertical wall 13 by the covered electric wire 17. A voltage having the same polarity as the charge polarity of the mist is applied (for example, while the spray paint mist is charged by an electrode of -10 KV, the voltage of -5 KV to
A voltage of -10 KV is applied to prevent the floating paint mist from adhering to the vertical wall 13 itself due to electric repulsion.

The power supply means 18 for applying a voltage to the hanging wall 13 monitors a current value, and cuts off the voltage application to the hanging wall 13 when the current value reaches a predetermined upper limit. Accordingly, a safety circuit 19 for preventing the occurrence of a spark in the vertical wall portion which causes a fire in the booth is additionally provided.

Next, another embodiment will be described.

(A) In the practice of the invention according to claim 1
The specific shape and structure of the vertical wall 13 is not limited to the shape and structure as in the above-described embodiment, and various improvements can be made. Further, in implementing the invention according to claims 1 to 3,
Thus, various materials can be applied to the material of the hanging wall 13.

(B) In the above-described embodiment, an example has been described in which the coating robot 5 is a coating device for preventing the adhesion of floating paint mist. However, the coating device for preventing the adhesion of floating paint mist is limited to the painting robot. Instead, various kinds of coating equipment installed in the spray coating work area 3 can be set as a target for preventing floating paint mist from adhering.

(C) The coating equipment installation area 3A is provided only on one side of the work installation area 3B or on the periphery of the work installation area 3B.
The present invention can also be applied to cases where there is.

(D) The ventilation air blowing speed V1 for the coating equipment installation area 3A may be equal to the ventilation air blowing speed V2 for the workpiece placement area 3B.

When the ventilation air blowing speed V1 for the coating equipment installation area 3A and the ventilation air blowing speed V2 for the workpiece placement area 3B are different from each other, it is necessary to determine which of the blowing speeds should be increased. The level of the blowing speed ratio may be determined as appropriate.

(E) In the implementation of the invention according to claim 2
It may omit the voltage application to vertical wall 13.

Further , in implementing the invention according to claim 1 or 3,
Oite, by applying the same polarity as the charging polarity of the voltage of the floating paint mist to vertical wall 13, to prevent paint mist adhesion to vertical wall 13 itself, the paint mist charged in an electrostatic painting as described above in Example Instead of using it, a means for charging the floating paint mist in the mere spray coating may be additionally provided.

(F) For implementing the invention according to claim 1 or 3
In order to apply a voltage to the vertical wall 13, as shown in FIG.
And a surface portion 13b made of aluminum or the like attached to the outer peripheral surface thereof, and a main body portion 13a made of a plastic material.
With a vertical wall mounting configuration with electrical insulation achieved by
The covered electric wire 17 from the power supply means 18 may be connected to the surface portion 13b.

Incidentally, reference numerals are provided in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a painting bush.

FIG. 2 is an enlarged sectional view of a vertical wall.

FIG. 3 is an enlarged sectional view of a vertical wall showing another embodiment.

FIG. 4 is a cross-sectional view of a painting bush showing a conventional example.

[Explanation of symbols]

 Reference Signs List 3 spray painting work area 3A painting equipment installation area 3B work piece placement area 5 painting equipment 7 ceiling outlet 7A, 7B blowout part 9 exhaust port 13 vertical wall 13A, 13B surface 18 power supply means

Claims (3)

(57) [Claims] In a spray coating work area (3) in which a coating device (5) is installed, a ceiling outlet (7) for blowing ventilation air downward from substantially the entire ceiling, and air in the area from a floor. A coating facility provided with an exhaust port (9) for discharging, between the coating equipment installation area (3A) and the work placement area (3B) in the spray coating work area (3), from the ceiling. the vertical wall (13) extending in provided, the
On the vertical wall (13), a charge of the same polarity as that of the floating paint mist is applied.
A coating facility provided with a power supply means (18) for applying pressure . 2. Spray coating with coating equipment (5) installed
In the work area (3), ventilation from almost the entire ceiling
Ceiling outlet (7) for blowing air downward, and floor
Equipment with exhaust port (9) for exhausting air from the area
A is, the spray coating of coating work area (3)
Between the equipment installation area (3A) and the work placement area (3B)
To the vertical wall (13) extending downward from the ceiling portion is provided, this
Surface of the hanging wall (13) on the side of the work to be coated (3B)
(13B) is formed on the vertical surface, and the coating equipment installation area
The area to be coated is closer to the lower end of the surface (13A) on the (3A) side.
(3B) The vertical wall formed on the convex curved surface located on the side
The cross-sectional shape of (13) is changed to
Painting equipment that. 3. A spray coating with a coating device (5) installed.
In the work area (3), ventilation from almost the entire ceiling
Ceiling outlet (7) for blowing air downward, and floor
Equipment with exhaust port (9) for exhausting air from the area
A is, the spray coating of coating work area (3)
Between the equipment installation area (3A) and the work placement area (3B)
To the vertical wall (13) extending downward from the ceiling portion is provided, this
On the vertical wall (13), a charge of the same polarity as that of the floating paint mist is applied.
Provided with a power means (18) for applying a pressure, this
Surface of the hanging wall (13) on the side of the object-arranged area (3B)
(13B) is formed on the vertical surface, and the coating equipment installation area
The area to be coated is closer to the lower end of the surface (13A) on the (3A) side.
(3B) The vertical wall formed on the convex curved surface located on the side
The cross sectional shape of (13) to airfoil shape of the lower cusp shape Thea
The coating equipment according to claim 1 .