JPS60216862A - Booth for spray painting - Google Patents

Abstract

PURPOSE:To remove rapidly the excess paint and to prevent the deposition of the paint in the vicinity by blowing out a ventilating gas from the lower side and from sideways, and evacuating the mist in the flow direction of the confluent gas. CONSTITUTION:A blow port S1 for blowing out a ventilating gas downward and blow ports S2-S7 for blowing out the gas horizontally are provided in a painting chamber 1, and a gas discharge port 23 is provided at a position in the flow direction of the confluent gas from both blow ports S1-S7. Consequently, the flow of the ventilating gas is rationalized, and the mist of excess sprayed paint is rapidly removed. Accordingly, the deposition of paint on a nearby apparatus, etc. is effectively prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a booth for spray painting automobile bodies, casings of home appliances, etc., and more particularly to ventilation equipment thereof.

Conventionally, when configuring the ventilation equipment in the above-mentioned spray painting booth, as shown in Figs. A ceiling air outlet (S+) is provided to supply air to the ceiling, and an exhaust outlet (S+) is provided to exhaust indoor air along with excess spray paint mist contained in the lattice floor (7) through the entire surface.
c) are distributed below the floor (7), thereby making the ventilation air flow as downward as possible in a laminar flow throughout the entire area of the booth, thereby suppressing the lifting of excess sprayed paint mist due to the vortex flow, resulting in a ventilation effect. In addition, by quickly discharging floating paint mist, it is possible to efficiently transfer and exchange coated objects while preventing color transfer due to residual paint between coated objects with different paint colors. He was considerate.

In the figure (A+ is the object to be coated, (8) is an articulated robot type automatic coating device equipped with a spray gun (8A), and (6) is a conveyor for carrying in and out of the shed to be coated.

However, as a result of various experiments with the conventional configuration, we found that it was possible to cause the ventilation air to flow laminarly downward throughout the entire area in the booth. ), etc., since ventilation air containing surplus spray paint mist is sprayed from above, the spraying actually causes a large amount of paint mist to adhere to and accumulate on surrounding painting equipment (8), etc. As a result, this adhered and deposited paint dries naturally and becomes easy to peel off, and is detached by the vibrations and ventilation airflow of the coating device (8), which then adheres to the painted surface of the shed and causes paint defects. Moreover, it is also a cause of failures in the increasingly complex and sophisticated automatic painting equipment, and in order to prevent these problems, frequent and time-consuming cleaning maintenance is required, which also causes a decrease in production efficiency.

The present invention makes it possible to effectively prevent the paint from adhering to the painting equipment, etc. around the rare object, while maintaining the function of quickly removing excess sprayed paint inside the Poonu, through rational improvements to the ventilation gas flow. The purpose of this invention is to improve the coating efficiency of the sprayed paint on the object to be coated.

The characteristic configuration of the spray painting booth according to the present invention is that it is provided with a downward outlet that blows out ventilation gas downward and a lateral outlet that blows out ventilation gas sideways, and the combined gas from the above-mentioned secondary outlets is The purpose of this is to provide an exhaust port that exhausts air in a direction roughly along the direction of flow of the gas, and its functions and effects are as follows.

In other words, as representatively shown in FIG. 1, the ventilation gas blown out downward and the ventilation gas blown out sideways are combined, and the combined gas is caused to flow.

Therefore, by the smooth flow of the 1st combined ventilation gas towards the exhaust port O side, excess spray paint mist floating in the booth can be quickly removed, and by the sideways blowout of the ventilation gas, the downward ventilation gas is directed towards the object to be coated side. Ventilation gas containing surplus spray paint mist flows into the object to be coated (4).
It is possible to avoid spraying onto surrounding painting equipment (8), etc., and it is possible to effectively prevent paint from adhering to surrounding painting equipment (8), etc.

Furthermore, by making the ventilation gas flow so as to concentrate it on the object to be coated, the sprayed paint can be backed up by the flow of ventilation gas no matter which direction it is sprayed onto the object to be painted. It is also possible that the excess spray paint mist that is generated as a result of the spraying will scatter and spread from the storage area to the interior space of the booth. This can be suppressed by the ventilation gas concentrated in the area, and these factors together can improve the application efficiency of spray paint.

As a result of the above, it is possible to transport and exchange coated objects as efficiently as before, while preventing color transfer between coated objects of different colors due to residual paint mist, and the frequency and time can be greatly reduced. In addition to improving maintainability, it is possible to further improve production efficiency by reducing the constraints on production time due to maintenance, while also reducing the rate of coating defects due to dust adhering to the coating surface of the object to be coated. We have created a spray painting booth with high coating efficiency and excellent painting workability.

Next, embodiments of the present invention will be described based on FIGS. 1 to 8.

#1 places the object to be coated [Al on the conveyor (6) on the front wall (2) and rear wall (3) of the spray painting room ill formed in the shape of a rectangular parallelepiped. A loading/unloading port (61) is formed for loading/unloading the tank, and a floor (61) is formed with a grid member.
7), an articulated robot-type automatic painting device (8) equipped with a Nupregun (8A) is placed side by side on both left and right sides along the direction in which the objects to be coated are conveyed by the conveyor (5), thereby creating a spray painting room. The painting booth is configured to spray-paint a shed stopped at a predetermined position within 11+ by automatically operating a painting device (8) based on a preset time schedule.

An air supply fan (9) is provided to supply ventilation air into the painting room fil, and an exhaust fan (
1O), and these fans (9: , (10)) are configured to forcefully ventilate the inside of the painting room fl+ in order to remove excess spray paint mist.

In the exhaust system path (8) for the exhaust fan (10),
A pan (11) that receives the paint lumps from the floor (7) without sticking by letting the cleaning water (Wl) flow down along the upper surface is placed below the floor (7) so that it covers almost the entire surface of the floor (7). At the same time, the opening shape in plan view allows the exhaust gas to pass downward at high speed while preventing the adhesion of paint mist by causing the cleaning water (WI) overflowing from the pan Q+ to flow down along the inner peripheral surface. Nut-like exhaust pipes θ are arranged in parallel, and the high-speed discharge gas from the exhaust pipe α is transferred to a cleaning water tank (disposed below the pan (11)).
As the paint mist in the exhaust gas collides with the water surface of the water tank (W), the difference in inertial mass is utilized to transfer the paint mist in the exhaust gas to the water surface of the water tank (W).
The first mist removing device Q4 captures the paint mist and thereby separates and removes the paint mist from the exhaust gas.

In addition, in the exhaust system path downstream of the first mist removal device (14), the exhaust gas after large-diameter paint mist and paint lumps are roughly removed by the first mist removal device α is removed. It flows down at high speed into the S-shaped curved pipe (I@) in a state where it merges with the overflow wash water (W2), and due to the centrifugal action that accompanies it,
Like the first mist removal device H, the first device captures small diameter paint mist by using the difference in inertial mass.
It is equipped with a mist removal device H.

In configuring the ventilation structure for the painting room (1), almost the entire surface of the ceiling θη is covered with air that is pressurized and supplied from the air supply fan (9) to the upper chamber and directed downward through the filter II. Formed as a downward air outlet (Sl) for supplying air into the room in a laminar flow, and left and right side walls (2OA), (20B), and front and rear walls +21 of the painting room f'l l.
, (lower side of each of 31) preferably in the range of /8 to 2/8, the lower 1/2 part from the air supply fan (9) to both side chambers (21A), (21B), and the front and rear chambers. (21C), (21D) horizontal blow-off ports made of punched plates (82-S
5).

Then, the null-shaped opening of the exhaust pipe Q2 as the indoor air exhaust port (2) is arranged below the stop position of the object to be coated, so that the ventilation air from the downward air outlet (Sl) and the horizontal air outlet ( By combining the ventilation air from S, -6,) and discharging the combined air from the exhaust port below the workpiece in a direction approximately along the flow direction, almost the entire amount of supplied ventilation air can be removed. It is configured to flow in a concentrated state in the storage area to be coated.

Tsu-! Although the actual suspended flow of ventilation air toward the workpiece side achieves rapid discharge of excess paint mist and improvement of coating efficiency, the downward ventilation air blows out sideways to prevent coating. Due to the unbalanced flow toward the object, the ventilation air from the side containing surplus spray paint mist is prevented from being sprayed onto the coating equipment (8) around the object to be coated, and the surrounding painting equipment (8) by the spraying is prevented from being sprayed. 8) It is constructed to completely prevent the peeling and adhesion to the surface.

Next, another embodiment will be described.

In order to blow out ventilation gas horizontally, as shown in FIG.
), (20B) is connected to the sideways outlet (S
It is possible to change it as appropriate whether it is formed into (!Ss) or not.

Furthermore, as shown in FIG. 5, there is a ceiling (Iη) as a downward air outlet (Sa) and a horizontal side air outlet (Ss).

Between the side walls (2OA) and (20B) as (Ss), inclined lateral blow-off ports (Ss) and (Sy) may be formed to blow out ventilation gas diagonally downward.

Sideways air outlet (Sa) formed on the front and rear walls (21, +31)
.

(Ss) may be omitted.

To blow ventilation gas sideways and downwards,
As shown in FIG. 6, almost the entire surface of the dome-shaped wall forming the painting room (1) is formed with an air outlet (51) that blows out ventilation gas toward the center of the dome shape, and an exhaust outlet (231).
It may be arranged and formed at the center of the dome shape, so that the combined ventilation gas flows in a state where it is concentrated at the center of the dome shape and toward the object to be coated (4) arranged above the exhaust port. In the present invention, those in which the direction of ventilation gas blows out is within a range of inclination of 45 degrees with respect to the horizontal direction are collectively referred to as horizontal blow-off ports (St to S?), and those in which the blowout direction of ventilation gas is downward. Those within the range of inclination of 45 degrees with respect to the vertical direction are collectively referred to as downward air outlets (Sl).

Above-mentioned downward air outlet (Sθ) and horizontal air outlet (S, R,
The specific structure of ~S7) can be improved in various ways, and
The structure of the exhaust port (2) can also be improved in various ways.

The blowout air volume ratio and blowout speed ratio of the ventilation gas from the downward air outlet (Sa) and the ventilation gas from the sideways air outlets (St to sy) are l:1 and 1:2, respectively, and some b are 2
:1 etc. Can be changed as appropriate.

[Brief explanation of the drawing]

1 to 8 show the male side of the present invention; FIG. 1 is a longitudinal sectional view, FIG. 2 is a schematic plan view, and FIG. 8 is a partially cutaway perspective view. FIG. 4, FIG. 5, and FIG. 6 are schematic vertical sectional views showing separate male sides of the present invention, respectively.
FIG. 7 and FIG. 8 show a conventional example, and FIG. 117 is a schematic vertical sectional view, and FIG. 8 is a schematic plan view. (Sa)...Downward air outlet, (Sg~Sy)
......Sideward outlet, (c)...Exhaust port, (4)...Object to be coated. Agent Patent Attorney Osamu Kitamura

Claims (1)

[Claims] ■ A downward outlet (Sl) that blows out ventilation gas downward.
) and a horizontal outlet (S2~) that blows out ventilation gas horizontally.
s7), and the secondary exits (Sl), (Ss~37
A spray painting booth equipped with an exhaust port to exhaust the combined gas from ) in the direction of its flow. ■ Each of the secondary exits (S+) and (82 to S7) is
The spray painting booth according to claim 0, wherein the ventilation gas is blown out in a substantially laminar flow. ■ Said horizontal outlet (Ss), (Ss)・(84
), (Ss), (sa), and (S7) are arranged oppositely in the spray painting booth according to claim 0 or 0. ■Claim No. 0, wherein the horizontal blow-off ports (SZ to Sy) are disposed around the entire circumference of the object to be coated.
or (2). ■ The spray painting booth according to claim 0, wherein the exhaust port G is disposed below the shed to be coated. Painting booth.