JPH0441957Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a system in which clean air supplied to an air supply room is introduced into a setting zone, an automatic painting zone, a hand-spraying painting zone, etc. through a filter in the ceiling. The present invention relates to a supply coating booth, and particularly to an improvement of a supply coating booth in which air curtains are formed before and after an automatic coating zone such as a robot coating zone where an automatic coating device is installed.

[Prior art and its problems]

As shown in FIG. 3, in this type of supply coating booth, a workpiece 2 to be coated is continuously conveyed by a conveyor into a tunnel-shaped coating booth 1, and is transported from an air conditioner 3 to an air supply chamber 4. The supplied clean air is passed through a filter 5 installed on the ceiling to a rate of approximately 0.3~
By introducing the wind at a predetermined speed of approximately 0.5 m/sec, it prevents paint mist and dust from flying up in the automatic painting zone 7 where automatic painting equipment such as painting robots 6 is installed, and prevents the painting surface from being caused by spray dust, etc. Prevents bumps from occurring.

In addition, the contaminated air in the automatic painting zone 7 containing paint mist, evaporated solvent, etc. is sucked into an exhaust treatment chamber 8 under the floor and discharged from an exhaust duct 9 in order to prevent disasters caused by ignition.

Furthermore, when paint is vigorously sprayed onto the work piece 2 from the paint machine 10 such as an air spray gun or an airless gun that is automatically operated by the painting robot 6, the paint particles also adhere to the following (or preceding) work piece 2. Since there is a risk of color cast, an air curtain K is formed by providing differential flow nozzles 11 and 11 before and after the automatic painting zone 7, respectively.

Each deliflo nozzle 11 has a slit-like air outlet 11b provided along the lower surface of the main body 11a formed in the shape of a gutter, and is installed in the width direction at predetermined intervals along the longitudinal direction of the painting booth 1. It is attached parallel to the filter support member 12 to the lower surface of the filter 5 which is attached and supported by the filter support members 12, 12, . . . .

This Deriflo nozzle 11 forms the air curtain K by using a part of the clean air introduced into the automatic painting zone 7 from the air supply chamber 4, so even if the air is blown from the Derivlo nozzle 11, the supplied air is The balance between the amount of air supplied from the chamber 4 into the automatic painting zone 7 and the amount of exhaust air discharged from inside the automatic painting zone 7 through the exhaust duct 9 is not lost, and therefore the amount of air supplied into the automatic painting zone 7 is maintained. This has the advantage that there is no risk of crosswinds occurring due to imbalance in the exhaust.

However, since it is necessary to take in as much air as possible into the main body 11a of the Deriflo nozzle 11, the main body 11a is formed wide, and since the main body 11a is attached to protrude from the lower surface of the filter 5, the main body 11a The area around the air outlet 11b that blows out air on the lower surface side becomes a negative pressure state, and a part of the clean air that is introduced directly into the automatic painting zone 7 through the filter 5 is sucked into the lower surface side of the main body 11a and is drawn in. Significant airflow turbulence occurs, and the paint particles thrown up by the airflow turbulence adhere to the lower surface of the main body 11a, and when they dry, they become dust and fall onto the workpiece 2.
There were cases where the paint fell onto the painted surface and caused paint film defects.

Further, the Deriflo nozzle 11 collects clean air at a low wind speed of about 0.3 to 0.5 m/sec that has passed through the filter 5 into a gutter-like main body 11a and blows it out from a slit-like air outlet 11b. The maximum wind speed is usually only about 1 m/sec.
Therefore, since the shielding power of the air curtain K formed by the air blown out from the air outlet 11b is extremely weak, a portion of the paint vigorously sprayed from the coating machine 10 in the automatic painting zone 7 is absorbed by the air. Easily penetrates the curtain K and enters the automatic painting zone 7.
In some cases, the paint entered the automatic painting zone 7' adjacent to the workpiece 2 and adhered to the surface of the subsequent workpiece 2, causing a color cast.

Note that if the width of the main body 11a is widened to increase the air intake area, the speed of the air blowing out from the air outlet 11b increases in proportion to this, and the shielding force of the air curtain K can be increased. However, since the area of the lower surface of the main body 11a becomes larger, there is a problem that the above-mentioned turbulence of airflow becomes significant and at the same time, the amount of paint particles attached increases.

[Purpose of invention]

Therefore, the present invention forms air curtains with shielding power in front and behind the automatic painting zone without causing any disturbance in the airflow of clean air introduced into the automatic painting zone through a filter installed in the ceiling. The purpose of the present invention is to provide a paint supply booth that can reliably prevent paint sprayed vigorously from a paint sprayer onto a workpiece from penetrating an air curtain and adhering to workpieces in other zones and causing color cast. do.

[Structure of the idea]

To achieve this objective, the present invention proposes an air supply system which is designed so that an air curtain is formed before and after the automatic painting zone where the clean air supplied to the air supply chamber is introduced through a filter in the ceiling. In the painting booth, filter support members for mounting and supporting the filter are installed in the axial direction at predetermined intervals along the longitudinal direction of the painting booth, and the filter support members are installed before and after the automatic painting zone. The filter support member is formed of air curtain piping each having an air outlet, and air is supplied under pressure to the air curtain piping.

[Effect of invention]

According to the present invention, among the filter support members installed to mount and support the filter, the filter support members installed before and after the automatic painting zone are formed of air curtain piping having an air outlet. Since the air curtain is formed using the air that is supplied under pressure to the air curtain piping, the air curtain piping does not protrude to the bottom side of the filter, and at the same time, the air curtain piping can be connected to the normal Like the filter support member, it can be formed narrowly. Therefore, it is possible to prevent the clean air introduced into the automatic painting zone through the filter from being drawn in and causing turbulence in the airflow, and from adhering paint particles to the surface of the air curtain piping.

Further, since air is supplied under pressure to the air curtain piping, air can be blown out from the air outlet at a desired wind speed to form an air curtain with a shielding power.

〔Example〕

Hereinafter, embodiments of the present invention will be specifically described based on the drawings.

FIG. 1 is a front view schematically showing an example of a supply coating booth according to the present invention, and FIG. 2 is a side view showing the main parts thereof.

Note that parts common to those in FIG. 3 are given the same reference numerals, and detailed explanation thereof will be omitted.

In the present invention, the filter support members 12, 12, . Filter support members 12 installed before and after the automatic painting zone 7 are formed of air curtain piping 13 each having an air outlet 14, and the air curtain piping 13 receives air to form an air curtain K at a desired wind speed. It is designed to be supplied under pressure.

In the embodiment, as shown in FIG. 2, each filter support member 12 consists of a pair of square pipes 12a and 12b that are closely attached in parallel to each other.
Square pipe 12 forming air curtain piping 13
Slit-shaped air outlets 14 are formed along the lower end surfaces of each of a and 12b.

In addition, adjacent filter support members 12 and 12
A filter holder 15 and a filter holder 16 are disposed vertically in between, and the filter main body 5a laid on the filter holder 15 is placed between the filter holder 15 and the filter holder 16.
A filter 5, which is removably fixed by means, is attached and supported.

Further, the air curtain piping 13 is connected to a blower 17 such as a turbo blower installed outside the painting booth 1, as shown in FIG.
The clean air in the air supply chamber 4 sucked by the filter 18 is removed from dust by a filter 18, and is supplied under pressure at a predetermined air pressure.

Therefore, when automatic painting is performed in the automatic painting zone 7 by an automatic painting device such as a painting robot, the blower 17 is operated to blow the air curtain piping 13 installed before and after the automatic painting zone 7. A part of the clean air supplied to the air supply chamber 4 is supplied under pressure into the square pipes 12a and 12b, and from the air outlet 14 formed on the lower end surface of these square pipes 12a and 12b, which is larger than the conventional Deriflo nozzle. For example, air is blown out at a maximum blowing speed of about 8 to 10 m/sec to form an air curtain K having a strong shielding force that cannot be penetrated by the paint sprayed from the coating machine 10 (shown in FIG. 3).

This reliably prevents damage caused by color cast, such as paint sprayed in the automatic painting zone 7 entering another adjacent zone 7' and adhering to the succeeding (or preceding) workpiece 2.

Further, since the filter support member 12 for mounting and supporting the filter 5 is directly formed in the air curtain piping 13, and air is supplied under pressure to the air curtain piping 13,
The air curtain piping 13 does not protrude toward the lower end surface of the filter 5, and at the same time, the air curtain piping 13 is connected to the square pipes 12a and 12b in the same way as the conventional filter support member 12.
It can be formed into a narrow width.

Therefore, the clean air introduced into the automatic painting zone 7 through the filter 5 is prevented from being caught around the air curtain piping 13 and causing turbulence in the airflow. This prevents damage caused by particles flying up and the paint particles flying up adhering to the surface of the air curtain pipe 13 and drying, turning into dust and falling onto the painted surface of the workpiece 2.

Further, as in the embodiment, if a part of the clean air fed into the air supply chamber 4 is supplied to the air curtain piping 13, the air supply from the air supply chamber 4 is supplied into the automatic painting zone 7. Since the balance between the amount of air and the amount of exhaust gas discharged from the automatic painting zone 7 through the exhaust duct is not disturbed, cross winds are also prevented from blowing into the automatic painting zone 7.

In addition, in the embodiment, the filter support member 12 is formed of a pair of square pipes 12a and 12b, and the air outlet 14 is formed in each of the square pipes 12a and 12b of the filter support member 12 that becomes the air curtain piping 13. However, in the present invention, the air outlet 14 may be provided only on one of the rectangular pipes 12a (or 12b), or each filter support member 12 may be formed from a single pipe.

In addition, the filter support members 12, 12... are not limited to square pipes, but can also be made of channel steel or the like.
Before and after the automatic painting zone 7, a filter support member 12 to which air curtain piping 13 made of a square pipe or a round pipe is fixed may be installed along the inside of the channel steel.

[Effect of idea]

As described above, in the supply coating booth according to the present invention, the air that is pressure-fed and supplied to the air curtain piping made of filter support members installed before and after the automatic coating zone is blown out at a desired wind speed, thereby increasing the shielding force. Since a certain air curtain is formed, paint sprayed within the automatic painting zone is reliably prevented from penetrating the air curtain and causing color cast on workpieces in other zones. In addition, this air curtain piping does not protrude from the bottom side of the filter and can be formed narrowly like a normal filter support member, so it can entrain clean air that is introduced into the automatic painting zone through the filter. This has the excellent effect of preventing airflow turbulence and adhesion of paint particles to the surface of the air curtain piping.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing an example of a supply coating booth according to the present invention, FIG. 2 is a side view showing the main parts thereof, and FIG. 3 is a side view showing a conventional supply coating booth. Explanation of symbols, 1...Painting booth, 4...Air supply room, 5...Filter, 7...Automatic painting zone, 1
2... Filter support member, 12a, 12b... Square pipe, 13... Air curtain piping, 14...
Air outlet, 17...Blower, K...Air curtain.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Supply coating that is done so that an air curtain is formed before and after the automatic coating zone where clean air sent to the air supply room is introduced through a filter in the ceiling. In the booth, filter support members for mounting and supporting the filters are installed in the width direction at predetermined intervals along the longitudinal direction of the painting booth, and among the filter support members, filters installed before and after the automatic painting zone are installed. 1. A painting booth with supply air supply, characterized in that the support members are formed of air curtain piping each having an air outlet, and air is supplied under pressure to the air curtain piping. (2) A part of the clean air supplied to the air supply chamber is
The painting booth according to claim 1, wherein the air supply is supplied under pressure to the air curtain piping by a blower installed outside the painting booth.