JPS5857981B2 - painting booth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the present invention, an air chamber 2 is provided in the upper part, and the air chamber 2 and the painting room 3 are completely partitioned by a ceiling plate 4 having air permeability. By attaching the ventilation resistor 12 having a substantially uniform ventilation resistance per area over the entire surface of the ceiling plate 4, an air flow with a substantially uniform wind speed is generated throughout the painting room, and the entire painting room is ventilated. The present invention relates to a painting booth that is constructed as follows.

In this type of painting booth, the color and irregularities of the object to be painted due to paint flying in the painting room and stains on the side walls of the painting room can be checked.
In order to eliminate this problem, it is better to increase the wind speed, but this method requires a large air blowing capacity, making the air supply equipment such as air conditioners and blowers excessively large, which has the disadvantage of increasing equipment and power costs.

In view of this, as shown in Japanese Unexamined Patent Publication No. 108648 of 1972, a long and narrow blowout nozzle with a large opening at the top and a small opening at the bottom is provided at the bottom of the ceiling panel to increase the wind speed at the required locations. One idea is to create a section of high-speed wind that passes close to the object to be painted in the painting room, thereby reducing the amount of paint flying around in the room through a kind of air curtain effect, and lowering the overall wind speed.

However, this technique has the disadvantage that airflow tends to be disturbed near the vicinity of the blow-off nozzle, and as a result, flying paint tends to adhere to the bottom and side surfaces of the blow-off nozzle, contaminating it.

The present invention creates a localized high wind speed portion in the air flow blown from the ceiling panel without using a blowout nozzle that has such drawbacks, thereby eliminating stains on the ceiling panel and fluctuations in the wind speed ratio. To provide a painting booth that allows good ventilation throughout the painting room.

Further, in the conventional technology as described above, the ceiling plate or the upper part of the ceiling plate is constructed with a member having fine ventilation holes to provide ventilation resistance, but such a member is Generally, it has a neutral function.

In such cases, as time passes, clogging occurs and ventilation resistance increases, but in places where blow-off nozzles like the one described above are installed, ventilation is poor due to the resistance caused by the nozzles, and the clogging progresses in other ways. It is C that it is later than the part.

As a result, the ratio between the wind speed from the blow-off nozzle and the wind speed at other parts changes over time, making it difficult to maintain an appropriate ratio.

As a result, the wind speed from the nozzle becomes too high, making it difficult to ventilate the entire room.

The present invention provides the above-mentioned painting booth, in which recesses projecting upward are provided at required locations of the ventilation resistor, and
Therefore, since the lower opening of this recess is characterized as a high-speed air outlet, the inner peripheral surface of the recess has a larger area than the area of the air outlet of the lower opening of the recess. As a result of the fact that a larger amount of air is trying to pass through this part than in other parts, the flow velocity in that part becomes higher than in other parts.
It is now possible to create localized high-speed flow sections without the need for blow-off nozzles.

Therefore, compared to the case where a blowout nozzle is provided as described above, there is no risk of turbulence in the air flow from the ceiling surface, and
It has now been possible to reliably create high-speed flow sections in the required locations without the risk of staining the ceiling surface, and while reducing the overall average flow velocity,
It has now been possible to eliminate the negative effects on painting work, such as color cast caused by flying paint.

Furthermore, since the amount of air passing through the inner surface of the recess is approximately the same as the amount of air passing through other parts, even if it functions as a filter, the progress of clogging will be the same per unit area, and the relative ventilation resistance. Therefore, there is no change in the ratio of the wind speed at the concave portion to the wind speed at other locations.

Next, the present invention will be explained in detail.

First Embodiment (See FIGS. 1 and 2) This embodiment will be explained using a painting booth for painting the body 1 of an automobile as an example.

Figure 1 is a schematic diagram showing a cross section of this painting booth, 2 is a ventilation chamber installed at the top of the painting booth, and 3 is a painting room 3.
The lower wall of the chamber 20, which is the ceiling plate 4, is made of a net.

The chamber 2 is configured to blow outside air through an air conditioner 5 and a blower fan 6 to a predetermined temperature.

A water-wash type cleaning device 7 is provided at the bottom of the painting chamber 3, and the indoor air that has passed through the cleaning device 7 is discharged to the outside by an exhaust device 8.

In the center of the painting room 30 floor plate 9,
A conveyor 10 is provided, and an automobile body 1, which is an object to be painted, is placed on the conveyor 10 and transported within the painting room 3.

The floor plate 9 is in the form of a grid so that air can pass toward the cleaning device 8 at the bottom.

Although not shown, various painting devices are attached to necessary locations inside the painting chamber 3.

A portion of the ceiling plate 4 corresponding to the upper left and right side portions of the object 1 to be coated is provided with a
Five strip-shaped high-speed air outlets 11 and 11' are provided.

The structure of the ceiling plate 4, as shown in an enlarged view in FIG. 2, has the following structure.

The upper side of the ceiling plate 4, which is the net, has a substantially uniform thickness and an appropriate ventilation resistance (generally about 107n'IL/H20, but may be made to an appropriate size as necessary). A felt-like filter 12 having a substantially constant airflow resistance per unit area as a whole is provided, and the air outlet 11,
In the portion corresponding to 11', the filter 12 is curved upward in a semicircular shape.

13 is a wire mesh that supports the inner surface of the recess 14 of the filter 12.

A plurality of rectifier plates 15 are arranged in parallel at the high-speed outlet 11, 11' to guide the airflow downward.

In this way, the filter 12 is made to have an appropriate ventilation resistance, and the filter 1 around the upper part of the air outlet 11, 11' is
By making the surface of the air outlet 20 larger than the area of the air outlet 11 and 11', the amount of air passing through the area of the air outlet IL11' per unit area is made larger than that of other parts of the ceiling plate 4. , 11', an air flow having a faster wind speed than other parts is blown downward.

Note that the arrow pointing downward in FIG. 2 indicates the wind speed vector.

Second Embodiment (See Figure 3) As shown in Figure 3, regulating plates 16 and 16' are provided on both the left and right sides of the mouth of the recess 14, and the high speed outlet 11.1 which is the mouth is provided.
The structure is such that the cross-sectional area of 1' is made small.

The rest of the structure is the same as that of the first embodiment.

Third Embodiment (See Fig. 4) As shown in Fig. 4, the coating room 3 is formed long in the direction of conveyance of the conveyor 10, and a plurality of coating devices are arranged in this direction of transfer, so that the coating position can be adjusted longitudinally. Multiple lines are placed side by side in the direction.

In such a structure, a second high-speed air outlet 17 is provided in the ceiling plate 4 between the painting positions to cross the ceiling plate 4.

In this way, the bonnet H at the front and rear of the car body 1
When opening the bonnet 1a or the trunk lid 1b for painting, the second high-speed outlet 1 cleans the upper surface of the bonnet 1a or the trunk lid 1b and sprays the paint in the direction of transport.
To prevent the high-speed air flow from 7 from reaching the body of an automobile located at an adjacent painting position, and to prevent discoloration from occurring.

The rest is the same as the first embodiment or the second embodiment.

In addition, in this embodiment, the high-speed outlet 17 in the shape of '&5 stripes may not be provided in the conveyor transport direction described in the first embodiment.

Furthermore, it is also possible to arrange two or more lines of the second high-speed air outlets 17 between the same adjacent painting positions.

In the above embodiments, it is also possible to change the structure by combining one or more of the following.

(2) The ceiling plate 4 at the high speed outlet 11, 11', 17 is removed.

■ One without the rectifying plate 15.

■ The ceiling plate 4 and the wire mesh 13 are made of punched metal.

■ The filter 12 is not limited to felt-like, but is substantially uniform.
A sponge-like nonwoven fabric or woven fabric may be used as long as it has an appropriate resistance.

(2) The filter 12 may be a series of filters extending over the entire ceiling panel 4, or may be a plurality of filters having a rectangular, hexagonal, rectangular, or triangular shape.

■Also, the ceiling plate 4 may be a panel-shaped piece that is shaded between ceiling burrs.

(2) The cross-sectional shape of the recess 14 is not necessarily limited to a semicircle, but may be various shapes such as a partial circle, a triangle, a trapezoid, a quadrilateral, a polygon, or a partial ellipse.

■ In the case where the rectifying plate 15 is provided, this rectifying plate 15
Direct the wind not only directly downward, but also in a slightly inclined direction.

(2) In addition to the filter 12, a main filter is provided at the air inlet in the chamber 2.

[Phase] The mesh is larger than the filter provided in the chamber 2 separately from the filter 12, and substantially covers the ceiling plate 4.
The filter 12 attached to the filter 12 may be one that does not perform a dust removal function, and may have an appropriate ventilation resistance even if it does not function as a filter as a whole.

Including this meaning, the name "ventilation resistor" is used in claim 1.

0 The painting booth of the present invention is not limited to use for automobile bodies;
Any conventional booth for painting objects to be painted may be used.

@ The high-speed outlet ports 11, 11', and 17 may be provided at any angle on the wall of the coating booth if they are arranged in a straight line. It is also good to form stripes in the shape of a ring, an ellipse, or a square frame at positions facing above the four sides of the object to be coated.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the painting booth according to the present invention,
Fig. 1 is a longitudinal sectional front view showing the first embodiment, Fig. 2 is an enlarged front view showing the main parts of the first embodiment, Fig. 3 is a front view showing the main parts of the second embodiment, and Fig. 4. FIG. 3 is a vertical side view showing a third embodiment. 2... Air chamber, 3... Painting room, 4... Ceiling plate, 12... Ventilation resistor, 14... Recessed part, 11.11', 17...
・High speed outlet.

Claims (1)

[Claims] 1. An air chamber 2 is provided in the upper part, and the air chamber 2 and the painting room 3 are connected to each other by a ceiling plate 4 having ventilation throughout.
A ventilation resistor 12 having a substantially uniform ventilation resistance per unit area is attached to the ceiling board 4 over the entire surface of the ceiling board 4, and the ventilation resistor 120 is placed at a required location in an upward direction. A recessed portion 14 is provided, which protrudes.
The lower opening of this recess 14 is connected to the high speed outlet IL11', 1
Painting booth at 7th. 2. The paint booth according to claim 1, wherein the resistor 12 is a felt filter. 3. The painting booth according to claim 1 or 2, wherein the ceiling plate 4 is made of a net-like body. 4 The recess 14 extends along the longitudinal direction of the elongated painting chamber 3.
It is formed into a strip shape and is provided at a position substantially opposite to the upper side of the object to be coated 1 placed on the conveyor 10, which is provided to move within the coating chamber 3 along its longitudinal direction. A painting booth according to any one of claims 1 to 3. 5. The coating booth according to any one of claims 1 to 4, wherein the recessed portion 14 is formed in a long strip shape in a direction perpendicular to the longitudinal direction of the coating chamber 3.