JPS6090064A - Dry painting booth - Google Patents

Abstract

PURPOSE:To obtain purifying effect always constantly, by providing a water spray mechanism to the upstream side of a filter for collecting paint mist and spraying water into paint mist discharged from a painting chamber. CONSTITUTION:A painting booth 1 is divided into an air supply chamber 2, a painting chamber 3 and an exhaust chamber 4 by a filter 5 and a drainboard 6 and water supply pipes 20 are provided to both sides of the exhaust chamber 4 in a longitudinal direction. A large number of nozzles 22 are provided to said supply pipes 20 and an exhaust duct 17 is further provided to the exhaust chamber 4 while a filter 19 for collecting paint mist is arranged to the lower part of the exhaust duct 17. By this mechanism, water droplets are reacted with the resin of paint mist to lower the viscosity of said mist and, therefore, said mist is fallen to the bottom part of the exhaust chamber without being adhered to the filter and paint mist can be collected always well.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a paint booth that utilizes a dry method to capture paint mist.

Prior Art Conventional Art 1 For example, in a painting booth where the object to be painted, such as an automobile body, is continuously conveyed by a conveyor or other conveyance device and painted by an automatic painting machine such as a painting robot or a reciprocator, as shown in FIG. A dry type paint booth is used.

In FIG. 4, reference numeral 51 denotes a paint booth formed in the shape of a tunnel, and the space inside this paint booth 1 is an air supply chamber 52. The air supply chamber 52 and the painting chamber 53 are separated by a filter 55 that removes fine dust, and the painting chamber 53 and the exhaust chamber 54 are separated by a screen 56. It is divided with the boundary as .

A conveyor 57 is laid in the longitudinal direction on the upper surface of the bamboo basket 56, and rails 58.5 are provided on both sides of the conveyor 57.
8a has been installed. Furthermore, automatic coating machines 59 and 59a such as coating robots are disposed on both sides of the coating room 53, and each of these automatic coating machines 59 and 59a is provided with a spray gun 60.degree. 60a. and 1
When the automobile body W on the trolley 61 is transported to the automatic painting machine 59, 59a, the spray guns 60, 60
The paint is sprayed by a to form a paint film.

In addition, an air supply duct I/62 is installed on the ceiling wall 52a of the air supply room 52.
are arranged in series, and an air conditioner 63 is arranged in series at the tip thereof, and an air supply fan 64 is provided at the end thereof. Further, a filter 65 for capturing paint mist is disposed in the υ1 air chamber 54, and an exhaust tact 67 having an exhaust fan 66 is connected to the side wall 54a.

When painting an automobile body W, conditioned air adjusted to a predetermined temperature and humidity by an air conditioner 63 is supplied to the air supply chamber 52 by an air supply fan 64, and is passed through a filter 55 to the painting chamber 53. Supply evenly. Then, along with the conditioned air supplied to the painting chamber 53, the paint mist that has not been applied to the automobile body W is discharged from the exhaust chamber 541 by the exhaust fan 66, and passes through the filter 56 disposed in the exhaust chamber 54. This allows the spray mist to be removed from the air conditioned air.

However, in such a dry type painting booth, the filter 65 disposed in the exhaust chamber 54 loses its ability to capture paint mist in the exhaust air in proportion to the usage time, so it is necessary to remove the exhaust chamber 54 and regenerate or remove it. Needs to be replaced. Therefore.

It goes without saying that a consistent cleaning effect cannot always be obtained9.
There are defects that require troublesome remanufacturing or replacement work.

Purpose of the Invention The present invention has been made to solve the above-mentioned problems.The purpose of the present invention is to provide a water spray mechanism upstream of a filter that captures paint mist, and to remove paint mist discharged from the painting room.
By spraying water on the strike.

To provide a dry type painting booth which eliminates the need for troublesome work such as removing and regenerating or replacing a filter, and which can always obtain a constant cleaning effect.

Structure of the Invention In order to achieve the above object, the structure of the dry type coating booth of the present invention is to reduce the space inside the painting booth.

1 from the top, with the filter and the screen child as boundaries.
Formed in the 1114th air supply chamber, painting chamber and exhaust chamber,
A supply pipe leading to a water supply source is provided in the longitudinal direction of both parts of the exhaust chamber, and a plurality of nozzles for spraying water are provided on opposite sides of the supply pipe.

Further, a D1 air duct is connected to the exhaust chamber, an exhaust fan is provided above the exhaust tact, and a filter for capturing paint mist is disposed horizontally below the exhaust tact.

EMBODIMENT OF THE INVENTION An embodiment of the present invention will be described in detail below with reference to the drawings.

[Configuration of Example]

Figure 1 is a cross-sectional view of a dry-type painting booth according to the present invention viewed from the front, Figure 2 is a cross-sectional view taken along the line ■-■ in Figure 1, and Figure 3 is a A cross-sectional view along the line is shown. In FIGS. 1 to 3, reference numeral 1 denotes a paint booth formed in the shape of a tunnel, and the space inside this paint booth 1 is opened from above by an air supply chamber 2. The painting chamber 3 and the exhaust chamber 4 are formed in sequence, and the air supply chamber 2 and the painting chamber 3 are
The painting chamber 3 and the exhaust chamber 4 are divided by a filter 5 for removing fine dust as a boundary, and the painting chamber 3 and the exhaust chamber 4 are divided by a screen 6 as a boundary.

An air supply duct 7 is connected to the air supply chamber 2,
An air supply fan 8 is provided in the middle, and an air conditioner 9 is connected to the tip. Also, Kanoko 6
A conveyor 1o is installed on the top surface in the longitudinal direction of the central part of the painting room 3, and on this conveyor 10 there is a cart 11 for placing and transporting an automobile body W, which is an object to be painted. A plurality of hooking dogs 12 are provided.

Rails 13.13a are laid on both sides of Mata and Conhair 1o, and by these rails 13.13a the trolley 1
It is designed to guide you through 1. Also.

There are painting robots on the sides of both rails 13.13a.

Automatic coating machines 14, 14a, 14b such as reciprocators.

14c is installed, and this automatic painting machine 14, 14a
.

14b and 14c are spray guns 1 that move vertically and horizontally to spray paint toward the automobile body W.
5, 15a, 15b, and 15c are provided.

Further, an exhaust device 16 is provided outside the exhaust chamber 4 and is formed in a linear manner. That is, an exhaust duct 17 is erected outside the exhaust chamber 4 , its upper end is open to the atmosphere, and its lower end is connected to the bottom of the exhaust chamber 4 . An exhaust fan 18 is provided above the exhaust duct 17.
A filter 19 for capturing paint mist is provided below the exhaust fan 18 over the entire width and length. This filter 19 is formed into a belt-like structure by weaving thin metal wires into a net shape, and stacking 10 to 100 sheets on top of each other.

The conditioned air containing the mZ profit mist discharged from the painting room 3 is allowed to pass therethrough, and the head material mist contained in the conditioned air is captured.

Further, supply pipes 20, 20a are arranged in the longitudinal direction at both end portions of the exhaust chamber 4, and the supply pipes 20.
20a rises in the - direction from approximately the center, passes through the cage 6, and extends into the painting room 3, and passes through the side wall 1a to communicate with a water tank 21, which is a water supply source. Further, the supply pipe 20.20a in the exhaust chamber 4 is provided with a plurality of nozzles 22.22a that spray water on opposite sides, and a water tank 21 is installed in the nozzle 22.22a in the middle of the supply pipe 2o.
A pump 23 is provided to supply water.

A killer agent or the like is added to the water stored in the water tank 21 in an appropriate proportion, and the pH is normally 7 to 9.
is managed by. This water is supplied by the pump 23 through the supply pipes 20, 20a to the nozzle 22.22a, and the supplied water is sprayed on opposite sides.

The particle size at that time is approximately the same size as paint mist,
It is sprayed in the range of 10 to 100μ.

Further, a drain port 24 is provided at the bottom of the exhaust chamber 4 to discharge water sprayed from the nozzles 22, 22a to the outside.

[Effect of the embodiment] In the dry type painting booth configured as described above,
The effect will be explained.

Simultaneously with the start of operation of the coating booth 1, the air conditioner 9 and the exhaust fan 18 are activated.

Outside air is introduced into the air conditioner 9 by the operation of the air supply fan 8, where it is removed from dust and maintained at a predetermined temperature.

The humidity is adjusted and the air is supplied to the air supply 2. and.

The conditioned air supplied to the air supply chamber 2 passes through the filter 5 and is evenly supplied to the paint 3.

Further, the automobile body W on the trolley 11 that has been transported by the conveyor 10 is transported into the painting room 3 from the entrance thereof. When the car body W is transported to the car paint machines 14° 14a, 14b, and 14c arranged on both sides of the painting room 3, the spray cans 15, 15
Paint is sprayed by a, 15b, and 15c to form a paint film.

In this manner, the automobile body W is sprayed with paint while being conveyed by the conveyor 10 to complete the painting process, and is then conveyed from the exit of the painting chamber 3 to the next process.

On the other hand, the exhaust system 16 is activated at the same time as the paint booth 1 starts operating, and the tilting material that has not been applied to the automobile body W is
Together with the conditioned air supplied to the painting room 3, the paint mist passes through the screen 6 as shown by the arrow, is discharged to the exhaust air 4, and is sprayed from the nozzles 22, 22a.
It passes through a region of fine water droplets with a particle size of 00μ. At this time, when the paint mist passes through a fine water droplet region, fine water droplets with a particle size approximately the same as that of the paint mist adhere to the paint mist, and by the time it reaches the filter 19 in the exhaust duct 17, fine water droplets and Killer agents and the like react with the resin in the paint mist to reduce its tackiness.

The paint mist and fine water droplets are then discharged to the exhaust gas 17 in a state where the tackiness has been reduced, and when passing through the filter 19, the paint mist and fine water droplets are simultaneously captured and mixed with other paint mist and fine water droplets. and falls to the bottom of the exhaust chamber 4. As a result, no paint mist remains on the filter 19. In this way, the viscosity of the paint mist is reduced and the paint mist is captured by the filter 19 repeatedly. The clean conditioned air from which the paint mist has been removed is discharged to the outside by the air fan 18 as shown by the arrow, and the paint mist that has fallen to the bottom of the exhaust pipe 4 is discharged from the exhaust port 24 to the paint mist tank ( (not shown).

〔Effect of the invention〕

As explained above, in the dry type painting booth of the present invention, a water spraying mechanism is provided upstream of the filter that captures paint mist, and water mixed with a killer agent etc. is sprayed into the paint mist discharged from the painting room. Since the spray material is used, fine water droplets mixed with killer agent, etc. adhere to the material, and react with the resin in the material mist, reducing the adhesiveness and causing it to stick to the filter.
Since the filter is dropped to the bottom of the exhaust chamber without being deposited, it is possible to eliminate the need for the troublesome work of removing the filter and regenerating or replacing it as in the past.

Further, since almost no paint mist adheres to or accumulates on the filter in the exhaust tact, there is an effect that good paint mist trapping performance can be maintained at all times.

Furthermore, in the present invention, since the filter is cleaned by fine water droplets from the nozzle while the painting booth is in operation, there is no need to stop the operation of the painting booth every time regeneration or replacement work is performed as in the past. This has the effect of significantly improving work efficiency.

Furthermore, in the present invention, the filter in the exhaust duct is constantly wetted by fine water droplets sprayed from the nozzle while the painting booth is in operation, which improves the ability to capture paint mist in the conditioned air discharged from the painting room. It has an improving effect.

Note that the present invention has been explained using an example in which a killer agent, etc. was added to the water sprayed from a nozzle, but depending on the type of paint, it is not necessary to add a killer agent, etc., and the same effect can be achieved with just fresh water. Effects can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a dry type painting booth according to the present invention viewed from the front, Fig. 2 is a cross-sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a cross-sectional view taken along the line -■ in Fig. 1. ■Cross-sectional view along the line, 4th
The figure is a cross-sectional view of a conventional dry-type paint booth viewed from the front. 1...Painting booth, LA...Side wall, 2...Air supply room. 3...painting room, 4...exhaust chamber, 5...filter. 6...Kanoko, 7...Air supply tact. 8...Air supply fan, 9...Air conditioner. 10...Conveyor, 11...Dolly, 12...Dog. 13.13a...Rail. 14, 14a, 14b, 14c --- Automatic painting machine. 15.15a, 15b, 15cm spray gun. 16... Exhaust device, 17... Exhaust duct. 18...exhaust fan, 19...filter. 20.20a... Supply pipe, 21... Water tank. 22.22a...nozzle, 23...pump. 24 ・Discharge port applicant Toyota Motor Corporation■ Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] The space inside the painting booth is formed into an air supply chamber, a painting chamber, and an exhaust chamber sequentially from above, with the filter and the screen as boundaries, respectively, and supply pipes leading to a water supply source are installed in the longitudinal direction of both sides of the exhaust chamber. A plurality of nozzles for spraying water are provided on opposing sides of the supply pipe, and an exhaust tact is provided in series in the exhaust chamber, and an exhaust fan is provided above the exhaust duct. A dry type painting booth characterized by a filter for capturing paint mist arranged horizontally below the booth.