JPH0148828B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to equipment for spray painting various objects to be painted, such as automobile bodies and casings of home appliances, and more specifically, a working device that can freely change the spraying direction for spray painting indoor objects to be painted. The present invention relates to spray painting equipment equipped with a ventilation device for removing excess spray paint mist, which blows out ventilation gas downward from almost the entire surface of the ceiling of the room, and exhausts indoor gas from almost the entire surface of the floor.

Conventionally, in the above-mentioned spray painting equipment, when ventilation gas is blown out and supplied by a ventilation device, excess spray paint mist sprayed upward by the working device can be prevented from adhering to the ceiling by the ventilation air flow blown out from the entire surface of the ceiling. The ventilation system was operated continuously at the high set blowing speed.

However, even though the time during which the spraying direction of the work equipment is directed upward is limited, it is not possible to continuously supply ventilation gas at the mist adhesion prevention speed from almost the entire surface of the ceiling. However, there was a problem with the large amount of power wasted in the ventilation system.

An object of the present invention is to make it possible to reduce the power required for ventilation while reliably preventing excess spray paint mist from adhering to the ceiling through rational improvements to the ventilation system.

The characteristic configuration of the spray painting equipment according to the present invention is that means is provided for detecting the spraying direction of the working device, and based on information from the detecting means, when the spraying direction of the working device is upward, the direction of spraying is higher than when the spraying direction is downward. The device is equipped with a control device that automatically increases the ventilation gas blowing speed of the ventilation device, and its functions and effects are as follows.

In other words, only when surplus spray paint mist is sprayed toward the ceiling, the downward blowing speed of ventilation gas is automatically increased, and the blowing airflow prevents paint mist from adhering to the ceiling. When the direction is other than upward, that is, when surplus spray paint mist is not being sprayed toward the ceiling, the ventilation gas blowing speed is automatically reduced to reduce the power consumption of the ventilation system.

Therefore, while reliably preventing excess spray paint mist from adhering to the ceiling, the power required for ventilation is significantly reduced compared to the conventional method of continuously blowing out ventilation gas at a speed that prevents mist adhesion. I was able to do it.

Next, embodiments will be described based on the drawings.

As shown in FIG. 1, a plurality of spray painting chambers 1 are provided in parallel between a pre-painting treatment section a and a post-treatment section b for drying and baking. Processing sections a and b are connected by a conveyor 2 for conveying objects to be coated.

To configure the spray painting room 1, as shown in FIGS. 2 and 3, the object A to be painted is carried in by the conveyor 2 and is stopped at a predetermined position in the room, and is then sprayed from the spray gun 3A. A plurality of articulated robot-type painting devices 3 are installed on both sides of the conveyance path, and the spraying operation of each painting device 3 is activated based on a preset time schedule. A program controller 4 is provided which automatically performs various operations such as stopping, changing the spraying position, and changing the spraying direction all at once.

Almost the entire ceiling of the spray painting room 1 is formed with a filter-type outlet 5, and an air supply fan 7 is provided to supply pressurized ventilation air to a ventilation chamber 6 for the outlet 5. An exhaust fan 9 is provided for forcibly exhausting indoor air from the floor 8 formed of iron gratings, and ventilation air is blown downward from almost the entire surface of the ceiling and supplied, and the indoor air is exhausted from almost the entire surface of the floor 8. A ventilation system is configured to remove excess spray paint mist from the room.

The exhaust route R of the ventilation devices 7 and 9 uses the difference in inertial mass between the exhaust air and the paint mist to clean the paint mist contained in the exhaust air due to the collision of the exhaust air with the cleaning water W ₁ and W ₂ . The first and second mist removal devices 10 and 11 that are captured by water W ₁ and W ₂ are interposed in series, and the exhaust air discharged outside the system is cleaned in order to prevent pollution. It is configured.

In configuring the ventilation air blowing and supplying structure in the ventilation devices 7 and 8, in the feeding chamber 6,
A plurality of sub-blowing devices 7A are provided to blow out the ventilation air therein downward from the local opening S at a velocity v ₂ higher than the ventilation air blowing velocity v ₁ by the air supply fan 7 alone, and During the automatic painting work process by the controller 4, the sub-blow-off devices 7A are arranged in a distributed manner so that the local positions of the ceiling blow-off ports 5, which may face the spraying direction of the work device 3, correspond to the local blow-off positions of the sub-blow-off devices 7A. It has been done.

A circuit 12 for detecting the blowing direction of the working device 3 based on information from the program controller 4 is provided, and based on the information from the detection circuit 12, the blowing direction of the working device 3 of the sub blowing device 7A is detected. An automatic control device 13 is provided for selectively driving and operating the components located at the corresponding positions only during the corresponding time.

In other words, only when surplus spray paint mist is sprayed toward the ceiling, and only from a location corresponding to the spraying direction, ventilation gas is automatically blown out at a speed _v2 higher than normal, and the blown airflow is This prevents excess spray paint mist from adhering to the ceiling, and when the spraying direction of the working device 3 is other than the upward direction, the sub blowing device 7A is automatically stopped and ventilation is performed at a low speed _v1 only by the air supply fan 7. Air is blown out to reliably prevent paint mist from adhering to the ceiling, while the power required for ventilation continues to be blown out from the entire surface of the ceiling during the painting process at speed _V2 to prevent paint mist adhesion. The structure is designed to reduce the amount by a large margin compared to the conventional method.

Next, another embodiment will be described.

As shown in FIG. 4 and FIG.
Separately from the air supply fan 7, a sub-air supply fan 7a is provided which supplies ventilation gas under pressure.
Discharge port 7 of parallel multiple air supply paths 7b connected to a
c, and the ceiling air outlet 5 so that the ventilation gas is blown downward and supplied into the room from the outlet 7c.
Automatic dampers 7d are installed in the air supply path 7b and are arranged in a distributed manner on the blowing surface of the working device 3, and are interposed in the air supply path 7b to individually cut off and on the blowing of ventilation gas from the discharge ports 7c. The working device 3 is controlled by the damper 7d and the sub-air supply fan 7a by the automatic control device 13 based on direction detection.
Only from the discharge port 7c located corresponding to the direction of spraying,
And, the sub air supply fan 7 is operated only during the time corresponding to that direction.
The configuration is such that the ventilation gas from a is discharged at a mist ceiling adhesion prevention speed v ₂ , and each of the plurality of air supply paths 7b and discharge ports 7c is connected to the sub-blower device 7A.
It's good as well.

Further, the specific cross-sectional shape of the blow-off ports S and 7c of the sub-blow-off device 7A can be modified in various ways, such as a slit shape or a circular shape.

In order to increase the downward blowing speed of ventilation gas when the blowing direction of the working device 3 is upward, instead of providing the sub blowing device 7A having various configurations as described above,
The control device 13 may be configured to change and control the blowing speed itself from the entire surface of the ceiling air outlet 5 by controlling the rotational speed of the air supply fan 7 or by controlling the vane angle.

To detect the spraying direction of the painting work device 3, instead of using the information from the controller 4 of the work device 3 as the detection target, the work device 3 may be provided with an operation detection sensor that detects the spraying direction. , the specific detection means 12 can be modified in various ways.

The present invention is applicable to a stationary painting type painting booth in which objects to be painted are spray-painted while being transferred and stopped in a spray-painting room serving as a partitioned space, and a continuous painting booth in which objects to be painted are placed side by side and are spray-painted while being conveyed in the direction in which they are juxtaposed. It can be applied to various types of painting equipment, such as painting booths.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention,
FIG. 1 is a layout diagram of the spray painting room, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a schematic plan view thereof. Figure 4 and
FIG. 5 shows another embodiment of the present invention, FIG. 4 is a longitudinal sectional view of the ventilation gas blowing structure, and FIG. 5 is a schematic plan view thereof. 1...Room, 3...Work equipment, 5...Ceiling, 7,
9...Ventilation device, 7A...Sub-blowing device, 8...
Floor, 12...detection device, 13...control device.

Claims (1)

[Scope of Claims] 1. A working device 3 capable of changing the direction of spraying for spray painting the object A in the room 1 is provided, and the ceiling 5 of the room 1 is
The spray painting equipment is equipped with ventilation devices 7 and 9 for removing excess spray paint mist, which blow out ventilation gas downward from almost the entire surface of the floor 8 and exhaust indoor gas from almost the entire surface of the floor 8, the work device 3 A means 12 for detecting the blowing direction is provided, and based on the information from the detecting means 12, when the blowing direction of the working device 3 is upward, the ventilation gas from the ventilation devices 7 and 9 is blown out more than when the blowing direction is downward. A spray painting installation equipped with a control device 13 that automatically increases the speed. 2. Claim 1, wherein the control device 13 is a device that selectively operates one of the plurality of sub-blowing devices 7A provided in the ventilation devices 7 and 9 that is located in a position corresponding to the blowing direction of the working device 3. Spray painting equipment described in .