JPH0461700B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a booth for spray painting automobile bodies, casings of home appliances, etc., and more specifically, the present invention relates to a booth for spray painting automobile bodies, casings of home appliances, etc. an air outlet for supplying air to the work area, and
The present invention relates to a painting booth equipped with a paint mist removal device that removes paint mist contained in exhaust gas from the working area and discharges the mist-removed gas to the outside of the system.

[Conventional technology]

Conventionally, in the above-mentioned painting booths, in order to prevent excess spray paint mist generated during spray painting from adhering to the painting equipment installed in the spray painting work area, ventilation gas outlets for the spray painting work area were installed. Among them, the blowing speed of the blowing part corresponding to the painting equipment installation area is made lower than that of the blowing outlet part corresponding to the painting object installation area where paint mist is generated.
In addition, when the exhaust port connected to the paint mist removal device is used to exhaust air from the spray painting work area, the exhaust port is placed on the floor of the area where the object to be coated is installed. (For example, JP-A-59-156457,
Also, see Japanese Patent Application No. 59-75450).

[Problem that the invention seeks to solve]

However, with the above-mentioned conventional means, the initial purpose of preventing paint mist from adhering to the coating equipment in order to facilitate cleaning and maintenance, and the purpose that is inextricably linked to this purpose, is to spray paint objects with different paint colors. To some extent, each of the objectives of eliminating paint mist within the work area as quickly as possible in order to efficiently perform sequential replacement of the work area without color transfer between the previous objects to be coated is achieved to some extent. However, since the achievement of these objectives is extremely significant industrially, it has been desired to be able to more effectively prevent the adhesion of paint mist and speed up the removal of paint mist.

Moreover, in the past, from the viewpoint of eliminating paint mist as quickly as possible, as mentioned above, the entire amount of temperature-controlled ventilation gas blown into the spray painting work area was temporarily removed through the exhaust port and paint mist removal device. Because it is discharged outside, the air conditioner that controls the temperature of the supplied ventilation gas needs to be large in terms of temperature control capacity, and the paint mist removal device also needs to be large in terms of processing air volume. As a result, not only did the overall structure of the device become larger, but there were also problems in that operating costs and equipment costs increased.

The purpose of the present invention is to make it possible to effectively and quickly remove surplus spray paint mist from the area where it is generated, where it is installed, to the area where the painting equipment is installed, with almost no mist drifting out. Furthermore, the improved configuration itself can be used more effectively to reduce the required temperature control capacity of the air conditioner and the required capacity of the paint mist removal device in terms of processing air volume.

[Means for solving problems]

The characteristic configuration of the painting booth according to the present invention is that the spray painting work area is directed downward to form a downward airflow curtain that partitions the spray painting work area into a workpiece installation area and a painting equipment installation area, each of which receives ventilation gas from an air outlet. A nozzle for blowing out air is provided, and an exhaust port is provided on the floor of the work area to exhaust air separately from the object installation area and the coating equipment installation area, and the paint mist contained in the exhaust gas is removed. an exhaust path that supplies gas from the exhaust port to the area where the object to be coated is installed, and a paint mist removal device that removes the mist and discharges the mist-removed gas to the outside of the system; The reason for this is that a return air path is provided to supply gas from the exhaust port to the equipment installation area.
The effects are as follows.

[Effect]

In other words, by dividing the spray painting work area into the workpiece installation area and the coating equipment installation area, each of which receives ventilation gas from the air outlet, the speed of ventilation gas blowing out to both installation areas can be simply controlled. In contrast, if the exhaust port that exhausts the spray painting work area is simply placed on the floor of the area where the object to be painted is installed, excess spray paint mist generated in the area where the object to be painted can be removed. It is possible to more reliably prevent the mist from drifting into the painting equipment installation area, and by reliably preventing the drift, the exhaust port can be used to intensively exhaust the entire excess sprayed paint mist generated. As a result, it is possible to prevent paint mist from adhering to the coating equipment and quickly remove the paint mist more effectively than before. As mentioned above, the airflow curtain can effectively prevent the paint mist from drifting into the area where the painting equipment is installed, but in order to prevent explosions and prevent odors from leaking outside, it is necessary to It is necessary to provide ventilation in the area where the equipment is installed.

In addition, the exhaust gas from the spray painting work area still has a large amount of temperature control heat, and by adopting the above-mentioned partition structure, the amount of ventilation gas from the painting equipment installation area is high. Focusing on the fact that the gas is discharged while maintaining its cleanliness, we installed exhaust ports that act as exhaust air for both installation areas separately, and created an exhaust path to direct the gas from the exhaust ports to the installation area of the object to be coated. By separately supplying gas from the exhaust port for the painting equipment installation area to the paint mist removal device through the return air passage, the gas is supplied to the spray painting work area as before. Compared to temporarily discharging the entire amount of temperature-controlled ventilation gas out of the system through the paint mist removal device, the required capacity of the paint mist removal device in terms of processing air volume can be greatly reduced.
In addition, by using the exhaust gas from the coating equipment installation area, which has high cleanliness and a large amount of temperature control heat, as return air, the required temperature control capacity of the air conditioner can be greatly reduced without any inconvenience in terms of cleanliness. be able to.

Furthermore, since the two installation areas are separated by an airflow curtain, there is no hindrance to the coating operation of the coating device.

〔Effect of the invention〕

As a result of the above, compared to conventional booths, cleaning maintenance for adhering paint mist can be made easier, and objects to be coated with different paint colors can be replaced more efficiently without color transfer. Especially in continuous painting work on a painting line, these two points have made it possible to greatly improve the painting processing capacity on a monthly or annual basis. Moreover, since the air conditioner and paint mist removal device need only be small, the overall equipment configuration can be made compact and installation ease in painting factories etc. can be improved.
Equipment costs and operating costs (especially heat source costs) were significantly reduced.

〔Example〕

Next, an embodiment of the present invention will be described based on FIGS. 1 and 2.

On the floor of the room-shaped spray painting work area 1, a transport conveyor 2 for passing the workpiece A through the area is arranged and extended in the left and right center of the work area 1, and also on the floor, a one-hand robot type conveyor 2 is installed. A plurality of automatic coating devices 3 are installed side by side in the extending direction of the conveyor 2 on both left and right sides of the work area 1.

In the ceiling of the working area 1, a central air outlet 5 is provided in the left and right center portions located above the passing path of the object to be coated A, for blowing out temperature-controlled ventilation air in a downward laminar flow through a filter 4. In addition, side air outlets 6 are provided on the left and right sides of the ceiling above the painting equipment installation area to blow out temperature-controlled ventilation air downwards, and air is contained in the exhaust air from the work area 1. The first step is to use cleaning water W to supplement and remove the paint mist that is present, and to discharge only the air from which the paint mist has been removed to the outside of the system.
and second paint mist removing devices 7 and 8 are installed in series, thereby forming a painting booth.

In the figure, 9 is an air conditioner that controls the temperature of fresh outside air taken in as supply ventilation air, 10 is an air supply fan, 11 is an air supply duct, 12 is an air supply chamber for the central outlet 5, and 13 is for the side outlet 6. The supply air chamber and 14 are exhaust fans.

A hanging wall 15 is provided at each boundary between the central outlet 5 and the side outlet 6 so as to extend in the direction of conveyance of the object to be coated, and at the lower end of each of these hanging walls 15 there is a wall 15 extending in the direction of conveyance of the object to be coated. A ventilation air blowout nozzle 16 is attached to form a downward airflow curtain F continuous to the airflow curtain F, and the hanging wall 15 and the airflow curtain F allow the spray painting work area 1 to be supplied with ventilation air from the central airflow outlet 5. The painting equipment installation area 1B is divided into a coating equipment installation area 1A that receives ventilation air from the side outlet 6 and a coating equipment installation area 1B that receives ventilation air from the side outlet 6.

A first exhaust port 17 in the form of a plurality of slits that acts to exhaust the object installation area 1A is provided on the floor directly below the position of the object to be coated during spray painting, and Second exhaust ports 18 that act to exhaust the device installation area 1B separately are provided on both left and right sides of the floor, and the downward exhaust path E of the first exhaust port 17 itself is connected to the first paint mist removal device 7. The first exhaust port 17
is connected to the first paint mist removing device 7 and the second paint mist removing device 8 via it, and
Each of the exhaust ports 18 is connected to a discharge duct 9A from the air conditioner 9 on the suction side of the air supply fan 10 for each outlet 5, 6 via a return air duct R and a dry filter 19 installed therein. They are connected in a shape.

In other words, both installation areas 1A and 1B are connected to the airflow curtain F.
By partitioning the spray paint mist generated in the object installation area 1A from drifting out to the coating equipment installation area 1B, it is possible to effectively prevent the paint mist from adhering to the main body of the painting equipment 3. To,
In addition, by preventing the mist from drifting out, the first exhaust port 17 is placed in a state where it acts intensively to exhaust all of the generated excess paint mist, thereby making it possible to achieve rapid removal of the paint mist more effectively. be.

In addition, by supplying only the exhaust gas with a high paint mist concentration from the workpiece installation area 1A to the first and second paint mist removal devices 7 and 8, the paint mist removal devices 7 and 8 can be operated in terms of processing air volume. In order to reduce the size of the painting equipment, the highly clean exhaust air from the painting equipment installation area 1B is returned and supplied to the air outlets 5 and 6 via the return air duct R, thereby reducing the exhaust air from the painting equipment installation area 1B. The required capacity of the air conditioner 9 can be reduced by effectively utilizing the large amount of temperature control heat that air still has.

[Another example]

Next, another embodiment will be described based on FIG.

A ceiling spray port 5 is provided on the ceiling of the spray painting installation area 1 to blow out temperature-controlled ventilation gas from almost the entire surface in a downward laminar flow, and both side walls of the work area 1 are covered with the temperature-controlled ventilation gas. A horizontal outlet 6 is provided that blows out air in a sideways direction toward the side where the object A is installed, and an automatic coating device 3 is installed between both the lateral outlets 6 and the area where the object A is installed.

A nozzle 16 forms a diagonally downward airflow curtain F from the upper edge of the side outlet 6 toward the installation location of the workpiece A at a position higher than the main body of the coating apparatus and continuous in the transport direction of the workpiece. are provided on each side, and the airflow curtains F are used to divide the spray painting work area 1 into a painting area 1A that receives ventilation gas from the ceiling air outlet 5 and a coating area 1A that receives ventilation gas from the side air outlet 6. The first area is partitioned into a device installation area 1B, and is placed directly below the installation area of the object to be coated A so as to exhaust the area 1A of the object to be coated.
The floor exhaust port 17 is directly connected to the first paint mist removal device 7, and the second floor exhaust port 18, which is arranged so as to act as an exhaust gas to the coating device installation area 1B, is connected to the blowing ventilation air. The suction side of the air conditioner 9 for controlling body temperature is connected via a return air duct R to a duct 9B for taking in fresh gas.

In the figure, reference numeral 19' denotes a device that removes paint mist mixed into the return gas by hitting the collision plate with the return gas from the coating device installation area 1B.

Note that the reference numerals in FIG. 3 correspond to the devices and the like in the embodiment described using FIGS. 1 and 2.

[Other alternative embodiments]

Next, other examples will be listed.

The specific arrangement and structure of each of the air outlets 5 and 6 that blow out and supply temperature-controlled ventilation gas to the coating object installation area 1A and the coating equipment installation area 1B, which are separated by the airflow curtain F, are as follows. Various configuration changes are possible.

The specific structure of the nozzle 16 that forms the partitioning airflow curtain F can be improved in various ways, and the direction of the airflow can also be changed to a curved surface or a bent surface instead of forming the airflow curtain F in a flat shape. It can be changed as appropriate depending on the case where both the installation areas 1A and 1B are partitioned.

In order to reduce and supply the gas from the exhaust port 18 for the coating equipment installation area 1B to the air outlets 5 and 6, the specific connection point of the return air passage R for the reduction supply is the air outlet 5 for both the installation areas 1A and 1B. , 6, or to the suction side of the air supply fan 10, or to the suction side of the air conditioner 9.

Further, if necessary, it is possible to interpose a booster fan or various gas purifying devices such as a filter or a deodorizing device in the return air path R.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, with FIG. 1 being a longitudinal sectional view and FIG. 2 being a plan view. FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention. 1... Spray painting work area, 1A... Object installation area, 1B... Painting equipment installation area, 5, 6... Air outlet, 7, 8... Paint mist removal device, 9... Air conditioner, 16 ... Nozzle, 17, 18 ... Exhaust port, F
...Airflow curtain, E...Exhaust path, R...Return air path.

Claims (1)

[Claims] 1 An air outlet 5 for supplying ventilation gas whose temperature is controlled by an air conditioner 9 to the spray painting work area 1;
6, and a painting booth equipped with paint mist removal devices 7 and 8 for removing paint mist contained in the exhaust gas from the work area 1 and discharging the mist-removed gas to the outside of the system, the painting booth comprising: A nozzle that blows air downward to form a downward airflow curtain F that partitions the area 1 into an object installation area 1A and a coating equipment installation area 1B, each of which receives ventilation gas supply from the air outlets 5 and 6. An exhaust port 17 is provided on the floor of the work area 1 to act to exhaust air separately from the object installation area 1A and the coating equipment installation area 1B, respectively.
18, an exhaust path E for supplying the gas from the exhaust port 17 to the painting device installation area 1A to the paint mist removal devices 7 and 8, and an exhaust path E for supplying the gas from the exhaust port 17 to the coating device installation area 1B. A painting booth provided with a return air path R for supplying gas to the air outlets 5 and 6.