JPS6154467B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a paint booth equipped with an air curtain.

When painting automobile bodies, etc. with a paint gun, etc., in order to improve the quality of the painting, the working environment, and pollution control, the work space must be well-ventilated and the air containing floating paint particles must be removed from the floor area, especially near the floor. A paint booth is used that removes paint particles and solvent vapor from under the floor to the outside.
In this type of painting booth, air is supplied from a blower to a static pressure chamber formed between the upper wall and ceiling of an almost tunnel-shaped working space, and after the air is passed through a filter to remove dust, a hole is formed in the ceiling. Alternatively, by dropping the paint into the work space at a nearly uniform speed through the grid, in addition to quickly dropping excess paint particles and solvent vapor ejected from the painting gun to the floor, it can also be used for painting objects such as automobile bodies and painting work. An air curtain that blows down from the ceiling is formed between the worker and the worker to prevent floating paint particles and solvent vapor from reaching the worker.

As a method for forming the air curtain,
A deflection member in the shape of an elongated flat box is attached to the ceiling parallel to the length direction of one side wall forming the work space, an outflow nozzle is provided on the deflection member, and the air in the static pressure chamber is diverted from the deflection member. JP-A No. 52-1999 discloses an air curtain-like air flow that is received inside the work space and blows down an air curtain-like flow diagonally downward from an outflow nozzle toward the center of the work space.
It is described in Publication No. 108648.

According to the above method, the air curtain-like airflow flows in a direction close to the surface of the object to be painted, so it is thought that floating paint particles will not reach the painter, but due to differences in the shape and dimensions of the object to be painted, the air If the curtain-like airflow directly collides with the object being painted, the quality of the coating will deteriorate due to the high wind speed near the painting surface, and the turbulence of the airflow caused by the collision will cause damage to the worker and the object to be painted. If air curtains are not formed between the workpiece and the operator experiences floating paint particles reaching the worker, and if the air flow directly impinges on the workpiece, excess paint particles may flow directly onto the workpiece. It has been experienced that the particles scatter to the upper part and adhere irregularly to the object to be coated, significantly deteriorating the coating quality. The purpose of improving coating quality and working environment cannot be achieved unless the position in relation to the outflow nozzle is separated by a certain distance or more, and in some cases the size of the coating booth is not selected depending on the type of object to be coated. It turned out that it wasn't possible.

Therefore, the present invention has been developed so that even if there are differences in the objects to be painted, such as differences in the type and shape of passenger cars, high-quality coating can be obtained using the same painting booth, the environment for workers is not deteriorated, and the overall use The purpose of the present invention is to provide a painting booth that can achieve power saving with a small amount of air.

A further object of the present invention is to ensure the formation of an air curtain-like airflow that prevents floating paint particles from reaching the painting operator, and to minimize the scattering of floating paint particles.

According to the present invention, there is provided a means for supplying an air flow substantially uniformly downward from the upper part of the tunnel-shaped work space to the work space; means for supplying an air curtain-like air flow downward into the work space through an opening formed in the duct by a duct arranged substantially parallel to the side wall at an interval of The opening formed in the duct is formed in an elongated shape in which the length in the longitudinal direction of the duct is significantly longer than the width in the direction perpendicular to the side wall. Two such openings are formed in parallel with each other at a predetermined interval in the vertical direction, and one of the openings formed in the duct is located at a position farther from the side wall, and the air curtain is supplied from the opening. The airflow is formed so as to be directed in the vertical direction or at an angle within 50 degrees from the vertical direction toward the side wall, and the air flow is directed into the work space through an opening located far from the side wall. The supplied air curtain-like air flow forms a flow that satisfies the optimum coating conditions along the object to be painted, and quickly guides excess paint particles downward without scattering them directly above the object to be painted. An air curtain-like air flow supplied into the work space from an opening located near the side wall prevents the paint particles from scattering toward the painter, thereby insulating the floating paint particles from the painter.

FIG. 1 of the accompanying drawings shows the known deflection member and the flow of the air curtain-like air flow provided by the member. The deflection member 101 is attached to a ceiling plate 3 of a building 2 in which a work space 1 is formed, and communicates with a static pressure chamber 4 formed between the top of the building 2 and the ceiling plate 3. The air sent into the static pressure chamber 4 from the blower is made to fall almost uniformly into the work space 1 from the entire surface of the ceiling 3, and is also supplied into the deflection member 101, and is The air is supplied into the work space 1 from the individual outflow nozzles 102 in the direction of the arrow 103 in the form of an air curtain. According to the description in the above-mentioned publication, the direction of the air flow shown by arrow 103 is at an angle of 50 degrees to 80 degrees with respect to the ceiling plate 3, so it is inclined at an angle of 10 degrees to 40 degrees with respect to the vertical direction. It is estimated that the water is supplied in a direction away from the center of the work space 1, that is, the side wall of the building 2.

The air curtain-like airflow thus supplied toward the center of the work space 1 flows toward the object to be coated introduced into the center of the coating booth,
Along with this flow, the airflow flowing down from the ceiling 3 is directed toward the center of the work space 1 as indicated by the broken line arrow, causing a tendency for floating paint particles to collect at the center of the work space 1. At the same time, it is estimated that the air on the surface of the object 104 to be coated is made to flow.

By the way, there is a wide workpiece 10 in the work space 1.
4 is introduced, the air curtain-like air flow flowing in the direction of the arrow 103 is often caused to directly collide with the object 104 to be coated. In such conditions, the air flow near the painting surface becomes faster due to the air curtain-like airflow, which often results in deterioration of the painting quality, and it is often experienced that the painting quality deteriorates.
04 is disturbed as shown by the dashed arrow, floating paint particles are scattered, and there is no air flow that should form an air curtain between the object to be painted 104 and the painter 105. , it has been experienced that floating paint particles reach the face and other areas of the worker 105, deteriorating the working environment, and furthermore, floating paint particles scattered directly above the object to be painted irregularly adhere to the object to be painted, It was also confirmed that the coating quality deteriorated.

Further, as shown in FIG. 2, the deflection member 101
When one outlet nozzle 102 is formed to supply a more air curtain-like air flow in the vertical direction as shown by the arrow 106, when the air curtain-like air flow impinges on the object 104 to be coated, floating paint particles are The scattering is further expanded horizontally, and the worker 105
It was confirmed that floating paint particles reached the entire body of the patient.

FIG. 3 is a schematic cross-sectional view of an embodiment of the painting booth of the present invention, in which a building 2 has a tunnel-shaped work space 1 for painting work, and an upper part of the work space. A ceiling plate 3 in which rod-shaped materials or plate-shaped materials are combined in a lattice pattern and a large number of through holes is stretched over the ceiling plate 3 to form a static pressure chamber 4 between the top of the building 2 and the ceiling plate 3. An air passage 6 that communicates with the discharge side of a blower 5 installed outside the building 2 is made to communicate with the static pressure chamber 4, and a filter 7 is laid entirely on the upper surface of the ceiling plate 3, so that the blower 5 is Dust is removed from the air supplied to the static pressure chamber 4 by a filter 7, and the purified air is blown down into the work space 1 through the through holes in the ceiling plate 3 at a substantially uniform speed. A flow rate control valve 8 is provided in the air passage 6, and the air volume is controlled by rotating around its axis.

The building 2 is provided with a floor plate 9 made of iron plate or lattice-shaped iron material with a large number of through holes, and a discharge space 10 is formed between the floor plate 9 and the bottom of the building 2. 11 and water 11
The structure is such that the air on the upper surface of the housing is exhausted to the outside by an exhaust fan 13 through an exhaust pipe 12. A flow rate control valve 14 is provided in the exhaust pipe 12 to control the amount of exhaust air.

At the upper part of the work space 1, there are side walls 15, 15 extending in the length direction of the tunnel-like work space 1 of the building 2.
Ducts 16 and 17 are located at a predetermined distance from the
are arranged in the static pressure chamber 4 so that their lengths are substantially parallel to the side walls 15, 15, and the openings 18, 19 at their lower ends are hermetically connected to the openings 20 of the ceiling plate 3. The ducts 16 and 17 each have an air passage 22 communicating with the discharge side of the blower 21.
The air from the blower 21 is supplied into the work space 1 from the respective openings 18 and 19 via the air passage 22. A flow rate control valve 23 is provided within the air passage 22, and the amount of air blown is controlled by rotating around its axis.

FIG. 4 is an enlarged view of the lower end of one of the ducts 16 and 17, and the other duct 17 is also constructed symmetrically thereto. In the opening 20 of the ceiling plate 3, a filter 24 is laid entirely on the upper surface of a part 25 such as a wire mesh stretched over the opening 20, and a distribution for forming an air curtain is installed on the lower surface of the opening 20. A device 26 is hermetically secured on both sides thereof.

The distribution device 26 shown in FIG. 3 and FIG. It has a width (width in the left-right direction of the paper in Figure 3),
Two narrow openings 27 and 28 are formed at a predetermined interval in the width direction, and the length directions are parallel to each other, and the air is supplied from the blower 21 to the duct 16 via the air passage 22. is the distribution device 2
It is configured to blow down into the work space 1 from the openings 27 and 28 of 6 in the form of a thin film-like air flow, that is, an air curtain-like air flow.

To explain the details with reference to FIG. 4, the distribution device 26 includes three molded plate members 29, 30, 31 having a length corresponding to the length of the object 104 to be coated.
a plate-like member 2 forming both side edges thereof;
9 and 31 are respectively one side edge of the opening 2 of the ceiling plate 3.
The central plate-shaped member 33 is fixed to the flange 32 forming the edge of 0, and connected to both plate-shaped members 29 and 31 at an appropriate interval in the length direction. arranging the members 30 in a supporting arrangement;
Adjacent edges 29', 30', 31' of the plate members 29, 30, 31 are made parallel to each other by a certain distance to form openings 27, 28, and the air is blown down through the openings 27, 28. An air curtain is formed to direct the direction of air flow. The direction of air flow from the opening 27 located near the side wall 15 of the building 2 of the distribution device 26 configured as described above is approximately vertical as shown by arrow A, and the opening located further from the side wall 15. The direction of the air flow blown down from 28 is directed toward the side wall 15 within an angle range of 20 degrees from the vertical direction, as shown by arrow B.

In this embodiment, in the distribution device 26 provided at the lower end of the ducts 16 and 17, one opening 27 located near the side wall 15 of the building 2 forming one side wall of the work space 1 is opened as shown by arrow A. By supplying an air curtain-like air flow in the vertical direction as shown in FIG. At the same time, by supplying an air curtain-like air flow shown by arrow B from the other opening 28 located further from the side wall 15, a downward air flow toward the object to be coated is formed. Floating paint particles ejected from the gun, colliding with the object to be coated 104 and flying up are quickly guided downward, thereby eliminating the risk of the floating paint particles reaching the operator. In this embodiment, a position far from the side wall 15, that is, the object to be painted 1
The direction B of the air curtain-like airflow blown down from the opening 28 located at a position close to 04 is oriented so as to be inclined toward the side wall 15 at a predetermined angle from the vertical direction. Even if a wider object 104 is introduced as compared to the conventional painting booth shown in FIG. The symmetry can be expanded, and coating quality can be ensured without floating paint particles scattering directly above the object to be painted. Even if the airflow shown by arrow B collides with the object 104 to be painted, one opening 27
Due to the presence of the air curtain-like air flow shown by arrow A, there is no risk of blocking the floating paint particles from reaching the operator 105.

In the distribution device 26 shown in FIG. 4, the width of the opening 27 is made wider than the width of the opening 28, and the volume of the air curtain-like air flow supplied from the opening 27 in front of the worker 105 is supplied from the opening 28. It is more than the amount of air. The area ratio of these openings 27 and 28 can be set as appropriate depending on the shape and type of the object to be coated 105.

FIG. 5 shows a modification of the distribution device 26 shown in FIG.
The end edges 30', 31' are formed separately from the plate members 30, 31, and are rotatably supported by shafts 34, 34', respectively, and the free ends are pivotally connected by a link piece 35. The direction B of the air curtain-like air flow supplied from the opening 27 can be changed within the range of 0 degrees to 50 degrees with respect to the vertical direction. According to this modification, the object to be painted 10
5 with different width dimensions and shapes were introduced,
This makes it possible to adjust the airflow shown by arrow B so that it does not directly collide with the object to be coated 104.

FIG. 6 shows the side wall 15 in the embodiment shown in FIG.
This is a modification in which the air flow supply direction of the opening 28' located at a farther position is directed vertically as shown by arrow B', and the other configuration is the same as that of FIG. 4. In this modification, an air curtain-like air flow supplied from an opening 27 located close to the side wall 15 blocks the space between the object to be coated 104 and the worker 105, and an opening 28' located far from the side wall 15 The effect of causing floating paint particles raised by the airflow to fall downward is similar to that shown in FIG. 4.

FIG. 7 shows an edge 29' of the plate member 29 forming the opening 27 in a modified example of FIG.
extending further downward from the lower end of the edge 30' of the opening 27 to increase the center wind velocity of the air curtain-like air flow supplied from the opening 27 compared to the case of FIG.
The effect of blocking floating paint particles by the air curtain-like air flow is enhanced.

FIG. 8 shows a streamlined rectifying plate 36 disposed within the opening 28' of the distribution device shown in FIG. This makes it possible to change the direction of the air flow supplied from the opening 28' within a range of 0 to 50 degrees from the vertical direction, thereby achieving the same effect as the distribution device shown in FIG.

FIG. 9 schematically shows another embodiment of the present invention in a cross section similar to that in FIG. 3, and has the same structure as in FIG. 3 except for the dispensing device. Therefore, the same parts are indicated by the same reference numerals, and the explanation will be omitted. The dispensing device 40 of this embodiment has a 10th
As shown enlarged in the figure, three molded plate-like members 4 having a length corresponding to the length of the object to be painted 104 are formed.
1, 42, and 43 are connected by a thin plate-like connecting member 44, and are airtightly attached to the opening 20 of the ceiling plate 3 by the side edges of the plate-like members 41, 43. The edge 45 and one edge 46 of the central plate member 42 are arranged in parallel to form an opening 47 located close to the side wall 15,
The air flow supplied from the opening 47 is directed vertically downward as shown by arrow A, and the other edge 48 of the plate member 42 and the other edge 49 of the plate member 43 are parallel to each other. An opening 50 is formed at a position remote from the side wall 15, and the air flow supplied from the opening 50 is directed at an appropriate angle within the range of 0 degrees to 50 degrees with respect to the vertical direction, as shown by arrow B. It is oriented so as to be inclined in the direction of the side wall 15. Further, the inner cavity of the distribution device 40 is divided into an opening 47 side and an opening 50 side by a partition plate 51 fixed to the central plate member 42 and the connecting member 44.
7,50 to prevent flow interference. It has been confirmed that the partition plate 51 is not necessary when the airflow velocity is slow.

Inside the opening 47, two guide plates 52, 52 are arranged parallel to the edges 45, 46, respectively.
7 is fixed to the connecting member 44 so as to divide it evenly in the width direction, and the end edges 45, 46
In each of the divided passages, a valve member 53 has one end pivotally supported on the edges 45, 46 or the guide plate 52 by a shaft 54. By remote rotation control, the valve member 53 is rotated to close or open each section passage. Also, inside the opening 50, two guide plates 55, 55 are fixed to the connecting member 44 parallel to the edges 48, 49, respectively, so as to divide the opening 50 equally in the width direction. 49 into three divided passages, and a valve member 56 has one end pivotally supported on the edges 48, 49 or the guide plate 55 by a shaft 57,
By remotely controlling the rotation of the shaft 57, the valve member 56 is rotated to close or open each segmented passage.

In this embodiment, openings 47 and 50 formed in the distribution device 40 are divided into a plurality of divided passages in the width direction by guide members 52 and 55, respectively, and valve members 53 and 56 are rotatably disposed in each divided passage. Since the divided passages can be closed or opened at will, it is possible to change the blowdown position and air volume of the air flow in the direction of arrow A or B supplied from each opening 47, 50 to the work space 1. . Therefore, the object to be painted 1
The position and volume of the air curtain-like airflow supplied from the opening 47 and the airflow supplied from the opening 50 are adjusted depending on the width and shape of the coating material 04, thereby improving the working environment of the worker 105, and improving the work environment of the workpiece 104. The quality of the coating can be improved by adjusting the amount of air on the painted surface.

The distribution device shown in FIG. 11 is a modification of the distribution device shown in FIG.
The end edges 48', 49' of 43 are formed separately and pivotally connected at one end to the plate members 42, 43, respectively, and the guide members 55, 55 are connected to the connecting member 44 by pivoting the end edges 48', 49'. These end edges 48', 49' and the guide member 55,
55 are connected by a plate-shaped link member 58, and by remotely controlling the link member 58, the working space 1 of the air flow supplied from the opening 50 is
The direction of supply into the interior can be freely adjusted to any angle within the angle range of 0 degrees to 50 degrees with respect to the vertical direction. As shown in FIG. 10, the divided passages divided by the guide member 55 can be closed or opened by a valve member 56 pivotally connected to the end edges 48, 49 or the guide member 55. In addition to the effects of the embodiment shown in FIG. 10, this modification has the effect that the direction of the air flow supplied from the opening 50 can be arbitrarily changed.

The dispensing device shown in FIG. 12 is another modification of the dispensing device shown in FIG.
Molded plate member 29, 3 shown in FIG.
0 and 31, and are connected by a connecting member 44 as shown in FIG. ing. Inside the opening 47, three guide members 52 are fixed to the connecting member 44 and divide the opening 47 into four divided passages equally in the width direction. A valve member 60 is rotatably arranged, and can be rotated to close or open the segmented passage by remote control of the shaft 59. In the other opening 50, a streamlined current plate 36 is rotatably supported by a shaft 37 as in FIG. 8, and a connecting rod 62 is connected to the free end of a lever 61 fixed to the current plate 36. By moving back and forth, the direction of the air flow supplied from the opening 50 can be changed within a range of 0 degrees to 50 degrees from the vertical direction. According to this modification, the air curtain-like air flow shown by arrow A that protects the worker 105 from floating paint particles can be adjusted in volume and blowing position, and the air flow shown by arrow B that lowers floating paint particles can be adjusted. There is an advantage that the orientation angle can be adjusted according to the size of the object 104 to be coated.

In each of the embodiments described above, the blower 21 for forming an air curtain-like air flow is provided separately from the blower 5 for forming a ventilation air flow, but this element is particularly important for the purpose of the present invention. Therefore, there is no problem even if a single blower is used as a supply source for both air flows.

FIG. 13 shows another embodiment of the invention. Comparing this embodiment with the embodiment shown in FIG.
6 and 17 are divided in the width direction and connected to the discharge sides of separate blowers, respectively, and the opening 20 of the ceiling plate 3 is
The difference is that two openings formed in the distribution device attached to the air blower are connected to the discharge side of the separate blower.

That is, as shown in FIG.
2, 73, and one edge of the plate-like members 71, 73 connects the flange 32 of the opening 20 of the ceiling plate 3.
The duct 16,1 is airtightly fixed to the
The lower end of a partition plate 74 that divides the partition plate 7 into two parts 68 and 69 in the width direction is extended to and fixed to a molded plate member 72 at the center of the dividing device 70, and the plate member 72 is connected to the partition plate 74 and Plate member 71,
73 and a connecting member 75 connected to the duct portion 73, and an opening 76 formed between the edges of the plate-like members 71 and 72 at a position close to the side wall 15 to connect the inner cavity of the dividing device 70 to the duct portion. 68
and a space 79 that allows an opening 78 formed between the edges of the plate-like members 72 and 73 at a position farther from the side wall 15 to communicate with the duct portion 69.

The duct portion 68 is communicated with the discharge side of the blower 81 via the air passage 80, and the duct portion 69 is communicated with the discharge side of the blower 83 via the air passage 82. , 78 are independent blowers 81, 83, respectively.
Air controlled by a flow rate control valve is supplied and blown down into the work space 1.

In this embodiment as well, the opening 76 located close to the side wall 15 supplies an air curtain-like air flow vertically into the work space 1 as shown by the arrow A, and the opening 78 located farther from the side wall 15 supplies the air flow into the work space 1 in the vertical direction as shown by the arrow A. As shown in FIG. 1B, an air flow is supplied into the work space so as to be inclined toward the side wall 15 by a desired angle within the range of 0 degrees to 50 degrees with respect to the vertical direction. According to this embodiment, in addition to the effects of the embodiment shown in FIG. The amount and velocity of the downward air flow in the direction shown by arrow B can be controlled by separate blowers 81, 83 and separate flow rate control valves, which has the effect of making it easy to determine optimal coating conditions.

Note that the distribution device in this example is the fifth one.
It is quite obvious that the dispensing device shown in FIGS. 8 and 10 can be constructed from molded plate-like members.

As explained in detail above, the present invention supplies air that has been subjected to dust removal treatment downward from at least the upper part of a tunnel-shaped work space through a filter,
In a painting booth in which air in the work space is to be removed from near the floor of the work space, means for supplying air to the work space from an upper part of the work space in a substantially uniform downward direction; An air curtain-like air flow is caused by an air curtain-like air flow through an opening formed in the duct from a duct disposed above the work space at a predetermined distance from and substantially parallel to one side wall forming the space. the opening of the duct is formed to be significantly longer in the longitudinal direction of the duct than the width perpendicular to the side wall; Two openings are formed parallel to each other at a predetermined distance in the direction, and one of the openings formed in the duct is located at a position farther from the side wall, and the air curtain-like airflow supplied from the opening is arranged vertically. Since the duct is formed so as to be oriented toward the side wall at a predetermined angle within an angular range of 0 degrees to 50 degrees from the vertical, the opening formed in the duct is located at a position close to the side wall. An air curtain-like airflow supplied from a certain opening is ensured to exist between the painting worker located close to the side wall and the object to be painted, and the airflow collides with the object to be painted and scatters. The floating paint particles are blocked so that they do not reach the operator, and the scattered floating paint particles are rapidly lowered by an air flow along the object to be coated that is supplied from an opening in the duct located far from the side wall. and even if the latter air flow collides with the object to be painted and scatters floating paint particles, the presence of the former air curtain-like air flow has the effect of preventing the paint particles from reaching the worker. It is something. Then, by directing the supply direction of the latter air flow so as to be inclined toward the side wall at a predetermined angle within an angle of 0 degrees to 50 degrees with respect to the vertical direction, a wide object to be coated is introduced into the work space. Even if the airflow does not directly collide with the object to be coated, there is less risk of the airflow directly colliding with the object to be painted, so even if the width or shape of the object is different, the frequency of painting quality and the working environment of workers will be reduced. can be significantly reduced. By making the supply direction of the latter air flow adjustable in the range of 0 degrees to 50 degrees with respect to the vertical direction, the frequency of deterioration of the quality and environment is further reduced.

Further, a guide plate is provided that divides the opening formed in the duct into a plurality of divided passages in the width direction, and a part or all of the divided passages divided by the guide plate can be freely closed or opened by a valve member. With this, the flow rate of the air flow supplied through the opening or the supply position of the air flow can be changed to suit the size and shape of the object to be coated,
This makes it possible to create the optimal air flow conditions for painting, further improving the quality of the painting.

[Brief explanation of the drawing]

Figure 1 is a schematic sectional view of a conventional painting booth, Figure 2
The figure is a schematic sectional view showing the modification, FIG. 3 is a schematic sectional view of one embodiment of the present invention, FIG. 4 is an enlarged sectional view of the main part, and FIGS. 9 is a schematic sectional view of another embodiment of the present invention, FIG. 10 is an enlarged sectional view of the main part thereof, and FIGS. 11 and 12 are sectional views of a modification of FIG. 10. , FIG. 13 is a schematic sectional view of still another embodiment of the present invention, and FIG. 14 is an enlarged sectional view of the main part thereof. In the figure, 1 is a work space, 3 is a ceiling, 15 is a side wall of the building, 16, 17 are ducts, 20 is an opening in the ceiling, 26, 40, 70 are distribution members, 27, 2
8, 47, 50, 76, 78 are the openings, 36 is a rectifying plate, 52, 55 is a guide member, 53, 56,
60 each indicates a valve member.

Claims (1)

[Claims] 1. Air that has been subjected to dust removal processing is supplied downward through a filter from at least the upper part of a tunnel-shaped work space, and the air in the work space is directed to the outside from near the floor of the work space. In the painting booth to be eliminated, there is provided a means for supplying airflow from the upper part of the working space downwardly almost uniformly to the working space; means for supplying an air curtain-like air flow downward into the work space through an opening formed in the duct from ducts arranged substantially parallel to the side wall at intervals, the duct The opening is formed in the side wall so that the length in the longitudinal direction of the duct is significantly longer than the width in the vertical direction, and two openings are formed in the side wall at a predetermined interval in the vertical direction. Among the openings formed in the duct, the openings are formed in parallel and are located at a position farther from the side wall, so that the air curtain-like air flow supplied from the openings is directed vertically or at an angle of 0 degrees to 50 degrees from the vertical. A painting booth characterized in that the painting booth is formed so as to be inclined toward the side wall at a predetermined angle within a range. 2 Among the openings formed in the duct, one opening located at a position farther from the side wall is provided with one or more rectifying plates at an intermediate position in the width direction of the opening, and the rectifying plate controls the air supplied from the opening. 2. The paint booth according to claim 1, wherein the curtain-like air flow is formed to be inclined toward the side wall at an angle of 0 to 50 degrees from the vertical direction. 3 Among the openings formed in the duct, one of the openings located at a position farther from the side wall is arranged so that the air curtain-like airflow supplied from the opening is 0 from the vertical direction.
3. The paint booth according to claim 1, wherein the paint booth is adjustable so as to be inclined toward the side wall within an angular range of from 50 degrees to 50 degrees. 4. Among the openings formed in the duct, the other opening located at a position close to the side wall is formed so as to supply an air curtain-like air flow supplied from the opening in a vertical direction. Painting booth according to scope 1 or 2. 5. A painting booth in which dust-removed air is supplied downward through a filter from at least the upper part of a tunnel-shaped work space, and the air within the work space is expelled to the outside from near the floor of the work space. , a means for supplying airflow downward from an upper part of the working space to the working space; and a side wall arranged at a predetermined distance from one side wall forming the space at the upper part of the working space. means for supplying an air curtain-like air flow downward into the work space from a duct arranged substantially parallel to the side wall through an opening formed in the duct, and the opening of the duct is arranged in the side wall. The length of the duct in the longitudinal direction is significantly longer than the width in the vertical direction, and two openings are formed in parallel in the side wall at a predetermined interval in the vertical direction, and Among the openings formed in the duct, the opening located at a position farther from the side wall directs the air curtain-like air flow supplied from the opening in the vertical direction or at an angle of 0 to 50 degrees from the vertical toward the side wall. Either or both of the openings is provided with a guide plate that divides the opening into a plurality of divided passages in the width direction, and a part or both of the divided passages divided by the guide plate are provided. A painting booth characterized in that the entire part can be closed or opened at will by a valve member. 6 Among the openings formed in the duct, one of the openings located at a position farther from the side wall is provided with a guide plate that divides the opening into a plurality of divided passages in the width direction of the opening, and the inclination of the guide plate allows the passage to be separated from the opening. The coating according to claim 5, wherein the coating is formed so that the supplied air curtain-like air flow is directed vertically or at an angle of 0 to 50 degrees from the vertical. booth. 7 Among the openings formed in the duct, one opening located at a position farther from the side wall directs the air curtain-like air flow supplied from the opening to 0 from the vertical direction.
7. The paint booth according to claim 5 or 6, wherein the paint booth is formed to be adjustable so as to be inclined toward the side wall within an angular range of 50 degrees to 50 degrees. 8 Among the openings formed in the duct, the other opening located near the side wall is formed so as to supply the air curtain-like air flow supplied from the opening in the vertical direction, and Claim 5, characterized in that a guide plate is provided that divides the passage into a plurality of divided passages, and a part or all of the divided passages divided by the guide plate can be closed or opened by a valve member. Painting booth as described in paragraph or paragraph 6.