JPS6145904Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dust prevention device for a painting line that prevents paint mist from flowing out in a painting room or dust from being sucked into a factory.

Generally, the method used in painting lines to prevent dust from entering the painting room is a forced air supply type push-pull method (indoor positive pressure method), which is used to paint the object to be coated, as in automobile refinish painting. When carrying the product into a painting room and performing work with the area completely sealed, the positive pressure can be used to prevent dirt from entering the painting room from outside, achieving the initial purpose of preventing dirt from adhering. It is something.

However, when using a conveyor to continuously feed objects to be coated into a painting chamber, it is necessary to provide an opening in the coating chamber through which the objects to be coated pass, and these openings cause various problems. .

For example, if the painting chamber is made to have negative pressure as shown in Figure 1A, the insufficient air will be sucked in through the opening at the attachment/detachment position, which will cause air containing dust from inside the factory to be sucked in, which will affect the paint finish. will occur. Additionally, if the pressure inside the painting room is set to positive as shown in Figure 1B, this will prevent dust from being sucked into the factory, but the air inside the painting room (including paint mist) will
Since the paint passes through the setting room and drying oven and is discharged from the opening at the loading/unloading position, the interior of the drying furnace and setting room is extremely contaminated with paint, and the installer/unloader is also exposed to paint damage. In addition to this, it also causes a major problem in that it spreads paint mist into the factory, which in turn causes early clogging of the filters in the air supply fans that suck the air inside the factory.

In view of the above-mentioned circumstances, the present invention provides a dust-proofing device that does not allow dust to enter the painting chamber or discharge paint mist from the painting chamber into the factory.

Hereinafter, the present invention will be described with reference to drawings of embodiments.

Reference numeral 1 denotes a painting room having an air supply fan 2 at one end and an exhaust fan 3 at the other end. In addition to connecting the passage 6 and the outlet passage 7, an auxiliary duct 8 with a filter is further branched and connected to the 4 part on the inlet side of the object to be coated, and a blower fan 9 provided in the auxiliary duct 8 supplies purified air a. Separately, an auxiliary duct 8' with a filter is connected so as to flow into the painting chamber 1 side and the inlet passage 6 side, and an auxiliary duct 8' with a filter is branched and connected to the outlet side 5 of the object to be coated, and a blower fan 9 is installed in the auxiliary duct 8'. The air a that has been purified in step 1 is made to separately flow into the painting chamber 1 side and the outlet passage 7 side. 10 is a dust filter 11 installed before and after the air supply fan 2
is a filter for collecting paint mist placed in front of the exhaust fan 3. Reference numeral 12 denotes a drying oven section located at the outlet passage 7 section.

Next, to explain this effect, first of all, in the painting room 1, the amount of air sent into the painting room 1 by one air supply fan 2 is greater than the amount of air sent into the painting room 1 by the exhaust fan 3 disposed on the other side.
The amount of air discharged is increased to make the pressure inside the painting chamber more negative than the pressure outside the painting chamber 1.

In this state, if an object to be coated (not shown) is placed on the conveyor 13 extending between the entrance passage 6, the painting chamber 1, and the outlet passage 7, the object will enter the entrance passage 6 and enter the coating chamber 1. It will be transported to.
However, in this case, at the open end 6a of the inlet passage 6,
Clean air a flows out from the blower fan 9 facing the inlet side 4 of the workpiece and is discharged outward (into the factory) from the open end 6a of the inlet passage 6. It is possible to prevent dirty air mixed with factory dust etc. from flowing in from 6a together with the object to be coated. Furthermore, on the object inlet side 4 where the object to be coated enters the painting chamber 1, the structure is such that clean air a flowing out from the blower fan 9 flows into the painting chamber 1 side. The paint mist inside does not flow out to the inlet passage 6 side, but is separately discharged into a duct (not shown) by the exhaust fan 3.

Furthermore, when the workpiece that has been coated in the painting room 1 heads toward the exit passage 7 side, clean air a is blown from the ventilation fan 9' at the exit side 5 of the workpiece.
flows into the painting chamber 1 side, the paint mist in the painting chamber 1 does not flow out even at this location, and at the opening end 7a of the outlet passage 7, the blower fan 9'
Since the more branched clean air a is discharged to the outside (inside the factory) in the same manner as described above, dirty air within the factory does not flow into the coating chamber 1 through the open end 7a.

FIG. 3 shows another embodiment showing the state of clean air being blown. In this case, the entrance side of the object to be coated in the painting room 1
The auxiliary ducts 8 and 8' branched into the section and the 5 section on the outlet side of the object to be coated are not equipped with individual blowing fans, but the auxiliary ducts 8 and 8' are equipped with an air supply fan 2.
It is connected to the duct 14 of.

That is, part of the air supply sent to the painting room 1 is branched,
Preventing paint mist from flowing out from the inlet side 4 and outlet side 5 of the object to be coated, which are the front and back of the painting room 1, and the inflow of dirty air in the factory from the opening ends 6a and 7a of the inlet passage 6 and outlet passage 7. This is to prevent

Furthermore, the amount of air discharged by the exhaust fan 3 disposed on the other side is made smaller than the amount of air sent into the painting room 1 by the air supply fan 2, so that the pressure inside the painting room 1 is lowered to the outside of the painting room 1. Even if the pressure is made more positive than the pressure of
Similarly, clean air sent from the intake fan 2 through the auxiliary ducts 8, 8' flows into the painting chamber 1 side, so the paint mist in the painting chamber 1 does not flow out.
The exhaust fan 3 exhausts the air to a separate duct (not shown).

As mentioned above, the present invention is equipped with blowing means capable of discharging clean air that branches into the inlet passage and the outlet passage, at the front and rear positions of the painting room, at the inlet and outlet sides of the object to be coated. Even if the pressure inside the room is positive, clean air blown by the blower fan flows into the painting room, so paint mist will not be discharged into the factory from the opening, and the pressure inside the painting room will be negative. There is also no risk of inhaling dust from inside the factory through the opening. Therefore, it is possible to install painting equipment that can be used even in factories where there is some dirt and dust.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG.
Figure 1B is an explanatory diagram showing the air flow when the conventional painting chamber is at negative pressure, Figure 1B is an explanatory diagram showing the air flow when the painting chamber is at positive pressure, and Figure 2 is an explanatory diagram showing the air flow when the painting chamber is at positive pressure. A plan view showing the main parts, and FIG. 3 is a plan view of another embodiment. 1...Painting room, 2...Air supply fan, 3...Exhaust fan, 4...Inlet side of object to be coated, 5...Outlet side of object to be coated, 6...Inlet passage, 7...Outlet passage, 8, 8'
...Auxiliary duct with filter, 9,9'...Blower fan, a...Air.

Claims (1)

[Scope of utility model registration request] In a painting room that is equipped with a dust filter on one side and a paint mist collection filter and exhaust fan on the other side, there is an inlet passage on the inlet side of the object to be coated and an outlet on the outlet side of the object to be coated. In addition to connecting the passages, there is also a
A dust prevention device for a painting line, which includes means for blowing clean air toward the painting room, the entrance passageway, and the exit passageway, respectively.