JPH0410939Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an improvement of a painting booth that exhausts the air in the painting room together with paint mist in which the instrument panel and blackout parts of an automobile body are painted after the top coating has been completed. .

[Prior art and its problems]

In the automobile painting process, a paint booth is used to spray coat anti-rust paints in different colors, such as brown and black, on the instrument panel section at the top of the front of the car body and the blackout section at the bottom of the front, respectively, which have been given a top coat. It is provided.

In consideration of labor savings and work efficiency, this type of paint booth allows one worker to paint the instrument panel and blackout while the car body is brought into the painting room by a conveyor and stopped at a predetermined position. Two types of spray guns are used alternately to hand-spray the paint.

In order to manage the health of workers performing hand-spray painting in this painting room, the present applicant has provided an upper suction duct and a lower suction duct, respectively, above and below the automobile body that is stopped in the painting room. From the upper suction duct at all times, for example, at a wind speed of 0.5 m/sec, approximately 120 m/min ³
At the same time, the air from the lower suction duct is also forcibly exhausted at the same speed as the upper suction duct at a wind speed of 0.3 m/sec.
^120m3 of air is forcibly exhausted, and the paint mist that was sprayed on the instrument panel area and became overspray is discharged from the upper suction duct, and the paint mist that was sprayed on the blackout area and became overspray is discharged from the upper suction duct. is discharged from the lower suction duct.

However, in this case, some of the paint particles sprayed onto the blackout area at the lower front of the car body are blown up by the suction force of the upper suction duct and adhere to the top coated surface of the bonnet area. This often resulted in the problem of color cast.

In order to prevent this problem, it is necessary to increase the speed and volume of the air sucked and discharged from the lower suction duct, but in this case, the capacity of the exhaust fan will increase, resulting in equipment costs and running costs. I had a problem with it being bulky.

[Purpose of invention]

Therefore, the inventor of the present invention focused on the fact that the instrument panel and blackout areas of an automobile body are painted alternately by one worker. By stopping the exhaust from the upper suction duct and exhausting air only from the lower suction duct, the exhaust volume of the lower suction duct can be increased without increasing the capacity of the exhaust fan that sucks and exhausts the air in the painting room. To provide a painting booth capable of preventing color cast on a bonnet part due to flying paint mist.

[Structure of the idea]

To achieve this objective, the paint booth of the present invention sucks and discharges the paint mist in the painting chamber where the instrument panel part at the upper front of the automobile body and the blackout part at the lower front of the car body are painted. The upper suction duct and lower suction duct are
Provided above and below the automobile body, respectively, when painting the blackout portion, a damper interposed in the upper suction duct is closed by the automobile so that exhaust is exhausted only from the lower suction duct. It is characterized by the fact that it is made of

[Effect of invention]

According to the present invention, when painting the blackout part at the lower front of the automobile body, the damper installed in the upper suction duct provided above the automobile body is automatically closed, and air from the duct is automatically closed. Exhaust is completely stopped, and exhaust is exhausted only from the lower suction duct provided below the car body.

Therefore, without increasing the capacity of the exhaust fan that exhausts the air in the painting room through the upper suction duct and the lower suction duct, the paint mist that has been sprayed onto the blackout area and becomes overspray can be removed from the lower suction duct. Cooperate with suction and discharge,
It is possible to reliably prevent the paint mist from flying up, and the paint mist does not adhere to the top-coated surface of the bonnet part and cause a color cast, unlike in the conventional case.

〔Example〕

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

1 and 2 are a side view and a front view showing an example of a painting booth according to the present invention.

In the figure, reference numeral 1 denotes a painting room where the instrument panel section 2a at the upper front of the automobile body 2 and the blackout section 2b at the lower front of the vehicle body 2 are painted.
4 is an upper suction duct installed above the car body 2 carried into the painting room 1; 4 is the car body 2;
This is a lower suction duct located below the

The upper suction duct 3 has its suction port 5 connected to an automobile body 2 that is stopped at a predetermined painting position in the painting room 1.
An automatic damper 7 that faces the instrument panel portion 2a from above and is opened and closed by an air cylinder 6 is interposed.

Further, the lower suction duct 4 is provided with suction ports 8R and 8L facing each other from the left and right sides of the automobile body 2, and an automatic damper 10 that is opened and closed by an air cylinder 9 is interposed.

The upper suction duct 3 and the lower suction duct 4 are connected to an exhaust treatment chamber 11 installed outside the painting room 1.

This exhaust treatment chamber 11 passes the air in the painting chamber 1 sucked and discharged from the upper suction duct 3 and the lower suction duct 4 by an exhaust fan 12 through a net filter 14 on which water droplets sprayed from a shower pipe 13 are attached. After the paint mist contained in the air is separated and removed by gas-liquid contact and cleaned, it is discharged to the outside through the eliminator 15.

Also, in the painting room 1, there are an instrument panel spray gun 16 that sprays, for example, brown anti-rust paint onto the instrument panel section 2a, and a black-out spray gun 17 that sprays black anti-rust paint onto the black-out section 2b. Individual gun latches 18 and 19
It is hung on.

Among these, the gun latching tool 18 for latching the instrument panel spray gun 16 is, for example, as shown in FIG. A hook 22 and a balance weight 23 for hanging the spray gun 16 are provided on each side.

Furthermore, stoppers 24 and 25 are provided on the left and right sides of the rotating shaft 20 to regulate the rotation angle of the lever 21 that attempts to rotate about the rotating shaft 20,
Both ends of the lever 21 are configured to swing up and down by a certain angle.

The end of the lever 21 on the balance weight 23 side is connected to a limit switch 27 that switches and controls a mechanical valve 26 that supplies compressed air to the air cylinders 6 and 9.
is engaged with the operator 28 of.

Then, for example, when the spray gun 16 is removed from the hook 22 and the lever 21 is in contact with the stopper 24 as shown by the solid line in FIG. 3, the operator 28 is engaged with the end of the lever 21. The limit switch 27 is configured to supply compressed air from the mechanical valve 26 to operate the air cylinders 6 and 9 so that the automatic dampers 7 and 10 are opened at the required opening degrees, respectively.

Also, the spray gun 16 is hooked to the hook 22, and the lever 21 swings as shown by the chain line in the figure.
When the operator 28 of the limit switch 27 is switched by the end of the lever 21, the mechanical valve 26 supplies compressed air to the air cylinder 6 to fully close the automatic damper 7, and at the same time supplies the compressed air to the air cylinder 9. It is controlled to supply compressed air that fully opens the automatic damper 10.

The above is an example of the configuration of the painting booth according to the present invention, and its operation will be explained next.

Normally, the instrument panel spray gun 16 and the blackout spray gun 17 are hung on the gun hooks 18 and 19, respectively, and at this time, the lever 21 of the gun hook 18 is in the state shown by the chain line in FIG. Therefore, as mentioned above, the automatic damper 7 installed in the upper suction duct 3 is fully closed, and the automatic damper 10 installed in the lower suction duct 4 is fully opened.
The air is exhausted only from the lower suction duct 4.

As shown in FIG. 1, when the automobile body 2 is carried into the painting room 1 and stopped at a predetermined painting position, a worker in the painting room 1 uses the spray guns 16 and 17 alternately to paint the instrument panel. The portion 2a and the blacked out portion 2b will be painted.

At this time, for example, when the operator first removes the instrument panel spray gun 16 from the gun holder 18 in order to paint the instrument panel part 2a of the automobile body 2, the lever 21 of the gun holder 18 is moved to the third position. The limit switch 27, in which the operator 28 is engaged with the end of the lever 21, is switched from the state shown by the chain line in the figure to the state shown by the solid line in the figure, and the limit switch 27 is switched from the state shown by the chain line to the cylinder 6 and 9. Compressed air is supplied to each of the automatic dampers 7 and 10 to open them at a required opening degree.

In addition, at this time, the opening degree of each automatic damper 7 and 10 is, for example, the upper suction duct 3 and the lower suction duct 4.
The air is controlled to be exhausted at a rate of 120 ^m3 per minute at wind speeds of 0.5 m/sec and 0.3 m/sec, respectively.

As a result, when an operator holds the spray gun 16 and paints the instrument panel section 2a, the paint mist oversprayed from the spray gun 16 is sucked into the upper suction duct 3 and the exhaust treatment chamber 11
and is separated and removed by gas-liquid contact within the exhaust processing chamber 11.

Then, when the painting of the instrument panel part 2a is completed and the operator hooks the spray gun 16 to the gun hook 18 again, the lever 21 of the gun hook 18 is
swings from the state shown by the solid line in the third figure to the state shown by the chain line in the same figure, and the operator 28 of the limit switch 27 is switched at the end of the lever 21, causing the automatic damper 7 to move from the mechanical valve 26 to the air cylinder 6. At the same time, compressed air is supplied to completely close the
Compressed air is supplied to the air cylinder 9 to fully open the automatic damper 10.

Next, remove the blackout spray gun 17 from the gun holder 19 and use the spray gun 17 to spray the blackout portion 2 of the automobile body 2.
Paint b.

At this time, the automatic damper 7 installed in the upper suction duct 3 is closed, and the exhaust is exhausted only from the lower suction duct 4, and the displacement of the lower suction duct is reduced to 240 m ³ without increasing the capacity of the exhaust fan 12. /
Since it has been increased to min, blackout part 2
This reliably prevents some of the paint particles sprayed onto the bonnet portion 2c from flying upward and depositing on the bonnet portion 2c.

In addition, in the above embodiment, the automatic dampers 7 and 10
In the above description, the case is explained in which the air cylinders 6 and 9 are operated by compressed air supplied from the mechanical valve 26, but the invention is not limited to this, and the invention is not limited to this. The automatic dampers 7 and 10 may be opened and closed depending on the conditions.

In addition, in the embodiment, the instrument panel spray gun 16
When the spray gun 17 for blackout is removed from the gun holder 19, the air is exhausted from the lower suction duct 4 independently. It can also be configured to be exhausted individually.

[Effect of idea]

As described above, according to the present invention, the air is sprayed onto the blackout area, resulting in overspray, without increasing the capacity of the exhaust fan that exhausts the air in the painting room through the upper suction duct and the lower suction duct. By strongly suctioning and discharging the paint mist only from the lower suction duct, it is possible to reliably prevent the paint mist from flying up, and unlike conventional methods, the paint mist can adhere to the top-coated bonnet surface and cause color cast. It has a very excellent effect of not causing any

[Brief explanation of the drawing]

1 and 2 are a side view and a front view showing an example of a painting booth according to the present invention, and FIG. 3 is an explanatory view of the main parts thereof. Explanation of symbols, 1...painting room, 2...automobile body, 2a...instrument panel section, 2b...blackout section, 3...upper suction duct, 4...lower suction duct, 6...air cylinder, 7 ...Automatic damper, 9
...Air cylinder, 10...Automatic damper, 11...
...Exhaust treatment chamber, 12...Exhaust fan, 16...Instrument panel spray gun, 17...Blackout spray gun, 18...Gun holder, 21...
Lever, 22...Hook fitting, 23...Balance weight,
26...Mechanical valve, 27...Limit switch.

Claims (1)

[Scope of utility model registration request] An upper suction duct and a lower suction duct are used to suck and discharge paint mist in the painting chamber that paints the instrument panel section at the upper front of the automobile body and the blackout section at the lower front of the automobile body, which are coated with top coat. When painting the blackout part provided at the lower part, a damper interposed in the upper suction duct is automatically closed so that exhaust is exhausted only from the lower suction duct. A painting booth featuring