JPH05184987A - Coating booth - Google Patents

Abstract

PURPOSE:To make exhaust control on each coating zone easy and to make the installation small by providing an exhaust duct wherein a blowing inlet is temporarily provided at a coating position being close to a boating position in a coating booth wherein air is fed from the upper part of a spray room and is exhausted from the lower part. CONSTITUTION:An air intaking room 3 and an air exhausting room 4 are provided on the top and the bottom of a spray room 2 of a coating booth 1. Then, an object to be coated, e.g. an automotive body is carried in the spray room 2 to perform a spray coating. In this case, each exhaust duct 11 is provided at positions, corresponding to both end parts of the automotive body 9. Each suction hole 12 of each air exhaust duct 11 is temporarily provided on e.g. a wheel house A3 of the automotive body 9 in one coating zone. In addition, each air exhaust duct 11 is connected with another air exhausting fan 13 being different from the air exhausting fan in the air exhaust room 4. When a wheel house A3 is coated in a coating zone, it is possible thereby to suck and remove generated coating mist from each air exhausting duct 11.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a coating booth. More specifically, it relates to a wind speed control device in a coating booth.

[0002]

2. Description of the Related Art In a coating booth for spray-coating an object to be coated such as an automobile body, in order to discharge paint mist, air is supplied and exhausted to create a flow of air in the spray chamber.

FIG. 4 shows a cross-sectional view of a conventional coating booth. In FIG. 4, 21 is a coating booth, which is a coating booth.
Reference numeral 21 includes a spray chamber 22, an air supply chamber 23 provided in the upper portion, and an exhaust chamber 24 provided in the lower portion. 25 is an automobile body, and 26 is a conveyor.

Air is supplied from the air supply chamber 23 to the spraying chamber 22, and the exhaust chamber 24
By exhausting the air, a flow of air is created as shown by the arrow.

By the way, when spray painting an automobile body 25 in a coating booth 21, the spray chamber 22 is divided into a plurality of coating zones in the longitudinal direction, and different portions are coated in each coating zone. .. For example, the side A1 is painted in the first paint zone, the top A2 is painted in the second paint zone, and the wheel house A3 is painted in the third paint zone.

[0006] In such coating by zone in the length direction, the wind speed is made different for each zone, and this wind speed control is performed by adjusting dampers installed in the air supply chamber 23 and the exhaust chamber 24. Is done by.

[0007]

However, if it is attempted to control the wind speed of each coating zone to the optimum value in accordance with the height and direction of the coating portion only by controlling the wind speed by the damper, it is possible to adjust the wind velocity to the maximum wind speed zone. Since it is necessary to set the air supply amount and the exhaust amount,
The capacity of the exhaust fan will increase, and the capacity of related equipment such as the flush scrubber will increase accordingly.

In view of the above points, the present invention is to provide a coating booth capable of easily controlling the wind speed for each coating zone and reducing the equipment scale of the coating booth.

[0009]

SUMMARY OF THE INVENTION The present invention is a coating booth configured so that air is supplied from the upper part to a spray chamber and discharged from the lower part. The present invention relates to a coating booth, which is provided with an exhaust duct whose suction port is close to the coating portion.

[0010]

[Operation] Since the exhaust duct is installed with its suction port close to the coating site according to the height and direction of the coating site in each coating zone, the height and direction of the coating site in each coating zone can be adjusted. Wind speed control. Furthermore, since a short and constant distance can be provided between the coating part in each coating zone and the suction port of the exhaust duct, the wind speed in the vicinity of the coating part can be controlled to an optimum value with a small exhaust capacity ( The wind speed in the vicinity is inversely proportional to the square of the distance to the exhaust duct suction port when the exhaust capacity is the same, so if the wind speed in the vicinity of the coating part is constant, the smaller the distance, the smaller the exhaust capacity may be.) Therefore, the equipment of the exhaust path can be reduced. That is, the capacity of the exhaust fan can be reduced, the exhaust duct can be small, and the capacity of related devices such as a water scrubber device can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the coating booth of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic vertical sectional view of a coating booth, and FIG. 2 is an enlarged sectional view taken along line XX of FIG.

In FIG. 1, the coating booth 1 is a spray room 2
And an air supply chamber 3 provided in the upper part and an exhaust chamber 4 provided in the lower part. 5 is a spray room 2 and an air supply room 3
And a partition wall between and having a number of appropriately sized openings. 6 is a partition wall between the spray chamber 2 and the exhaust chamber 4, which has a large number of appropriately dimensioned openings.

The discharge side of the air supply fan 7 is connected to the air supply chamber 3 via a duct or the like. The suction side of the exhaust fan 8 is connected to the exhaust chamber 4 via a duct or the like, and the discharge side of the exhaust fan 8 is connected to a water scrubber device or the like.

An automobile body 9 as an object to be coated is a conveyor 10
Is moved to the spray chamber 2 and is spray coated during that time.

The spray chamber 2 has a coating zone B extending in the longitudinal direction.
1, the coating zone B2 and the coating zone B3 are divided into, for example, in the coating zone B1, the side A1 of the body.
Is applied, the top A2 is applied in the application zone B2, and the wheel house A3 is applied in the application zone B3.

In the coating zone B3, exhaust ducts 11, 11 are installed at positions corresponding to both sides of the automobile body 9, and the suction port 12 of the exhaust duct 11 is close to the wheel house A3 of the body 9. .. The exhaust duct 11 is connected to the suction side of an exhaust fan 13 that is separate from the exhaust fan 8 of the exhaust chamber 4, and the discharge side of the exhaust fan 13 is connected to a washing scrubber device or the like.

When the automobile body 9 moves to the coating zone B3 and the wheel house A3 passes through the exhaust duct 11, the wheel house A3 is coated by a coating machine (not shown) installed in the vicinity of the exhaust duct 11. Do. Most of the paint mist generated at that time is sucked into the exhaust duct 11. Since the suction port 12 of the exhaust duct 11 is close to the wheel house A3, it is easy to control the wind speed at the part of the wheel house A3, and the capacity of the exhaust fan 13 may be small.

In the coating zone B3, most of the paint mist is discharged by the exhaust duct 11, so the discharge amount from the partition wall 6 to the exhaust chamber 4 may be greatly reduced.
Therefore, the capacity of the exhaust fan 8 in the exhaust chamber 4 can be reduced accordingly. Further, since the total amount of exhaust capacities of the exhaust fan 8 and the exhaust fan 13 can be made smaller than that of the conventional example in which the exhaust duct 11 is not provided, the scale of related equipment such as a water scrubber device can be reduced. The amount of discharge to the exhaust chamber 4 in the coating zone B3 can be reduced by adjusting the size and number of openings of the partition wall 6.

Although the exhaust duct is provided only in the coating zone B3 in the above embodiment, the coating zones B1 and B2 are not provided.
Also, an exhaust duct may be provided, which can further reduce the equipment scale of the exhaust path.

FIG. 3 shows an example of the exhaust duct provided in the coating zone B2. Exhaust ducts 14 in FIG. 3 stand up on both sides of the car body 9, and their suction ports 15 are top A2.
Being close to.

In the above description, the coating parts were completely different in each coating zone, but there are cases where two or more coating parts are simultaneously coated in one coating zone using two or more coating machines ( For example, side A1 and top A
If two are to be coated simultaneously), then one or more exhaust ducts of different heights may be provided in one coating zone.

[0023]

EFFECT OF THE INVENTION In the coating booth, the wind speed can be easily controlled according to the height and direction of the coating portion of each coating zone, and the equipment scale of the coating booth can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing an embodiment of a coating booth of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line XX of FIG.

FIG. 3 is a cross-sectional view showing another example of an exhaust duct.

FIG. 4 is a cross-sectional view showing a conventional coating booth.

[Explanation of symbols]

 1 Coating booth 2 Spraying room 3 Air supply chamber 4 Exhaust chamber 11,14 Exhaust duct 12,15 Suction port A1, A2, A3 Painting parts

Claims (1)

[Claims] 1. A coating booth configured so that air is supplied from the upper part to the spray chamber and discharged from the lower part,
A coating booth, characterized in that an exhaust duct is provided in the spraying chamber, the suction port of which is close to the coating portion of the object to be coated.