JP2001239194A - Sound-absorbing structure of coating booth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound-absorbing and sound-insulating structure for improving working environments for a coating worker and reducing the level of noise emitted from an exhaust duct to the outside by absorbing and insulating the noise originating especially from an exhaust fan in a coating booth, with regard to the various kinds of the coating booths. SOLUTION: A sound-absorbing material for absorbing/insulating the noise of the exhaust fan is applied in a treating column where a coating mist originating from the coating booth is treated. That is, the sound-absorbing material is applied to the inner wall face of the treating column of the coating booth, or a cylinder with the sound-absorbing material applied to its inner face is arranged in a fan aperture as a suction aperture of the exhaust fan. Further, a sound-insulating board to which the sound-absorbing material is applied, is arranged under the fan aperture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reduces the noise from an exhaust fan generated from a painting booth during a painting operation.
The present invention relates to a technology for improving the working environment for factory workers, especially for painters, and reducing noise emission from an exhaust duct to the outside.

[0002]

2. Description of the Related Art A paint booth used in a painting operation is a paint booth which collects paint mist by using a filter or the like. FIG. 9 is a wet paint booth which catches and collects paint mist by gas-liquid contact with a liquid such as water. There are many used since ancient times.

The dry-type painting booth shown in the schematic diagram of FIG. 9 is an example of an alternative structure among various types. The baffle plate 1 uses a baffle plate 1 to collect relatively coarse mist by utilizing the inertia of the paint mist, and the baffle plate. The fine mist that could not be collected by the filter 1 is collected by the filter 2 disposed behind the baffle plate 1 and the processing tower 9
From the outside with the exhaust fan 3. A large number of coating booths with a width of about 1 to 10 m are manufactured and shipped as standard. The exhaust fan 3 for producing the suction wind speed of the painting booth is mounted and mounted mainly on the main frame 4 of the painting booth, and one or several exhaust fans 3 are attached to the front of the painting booth. . Then, since the painter performs the paint work in front of the booth, the noise from the exhaust fan 3 is reduced by the baffle plate 1.
It is almost directly received through the filter 2, and is working in a work environment where the voice of the neighbor cannot be heard.

[0004] As an alternative structure example of a wet painting booth, there are a shower painting booth with a water flow plate (hereinafter referred to as a shower booth) shown in FIG. 10A and a venturi painting booth (hereinafter referred to as a venturi booth) shown in FIG. To say). In the shower booth of FIG. 10 (A), a water flow plate 5 is provided in front of the booth, and a water tank 6 is pumped up by a pump 7 and flowed to the water flow plate 5, and a paint mist having a high inertia from a spray gun is applied to the water flow plate. The collected and fine paint mist is introduced into the processing tower 9a behind the water flow plate from the suction port 8 opened at the lower part of the water flow plate 5. Then, the introduced paint mist comes into gas-liquid contact by spraying from a shower nozzle 10 provided in the processing tower 9a, and the paint mist is trapped and collected by a liquid such as water. The painter is working in the noise caused by the rotation sound and wind noise of the axial flow type exhaust fan 11 from the suction port 8 and the spray sound of the washing shower 10.

In the venturi booth shown in FIG. 10B, a turbo type exhaust fan 12 having a higher head than the shower type booth is mounted, and the tank water 13 is formed at the lower part of the partition plate 14 by using the suction force of the exhaust fan 12. The water and the paint mist are sucked together with the high-speed airflow from the suction port 15, and a vortex of water is created in the vortex chamber 15 a using the high-speed airflow in the treatment tower 16, and the paint mist is introduced into the vortex and the gas-liquid Collect by contact. Therefore, since the venturi booth uses the exhaust fan 12 with a high head, the painting work in a more intense noise has to be performed as compared with the dry booth of FIG. 9 and the shower booth of FIG. 10A. I have.

[0006] From the above situation, the present applicant has filed Japanese Patent Application 2000
JP-A-21067 and Japanese Patent Application No. 2000-31307 disclose a painting booth technology having a silent structure that reduces noise generated from the painting booth itself by the painting booth and the paint mist collecting device shown in FIG. The mist collecting part 17 has a relatively large gap between the front end of the inclined part at the lower part of the front water flow plate 18 and the internal dispersion plate 17a, and the wind speed of the meandering air flow is as high as that of the spiral chamber of the conventional venturi booth. However, since it is possible to splash water into fine water droplets even if it is not, it greatly contributes to noise reduction while maintaining the collection efficiency of paint mist. In addition, the processing tower 19 immediately below the exhaust fan 19
a, the low-frequency vibration generated by the rotation of the exhaust fan 19 and the air flow is not emitted to the front opening side of the booth, which is the work position of the painter, so that the treatment tower 19a and the front water flow plate 18
A sound attenuating space 18b is provided between them. Furthermore, since the water flow baffle plate 18a is disposed in front of the front water flow plate 18, the rotation noise and wind noise of the exhaust fan 19 and the mist collection unit 1
The sound generated at step 7 can be shielded to reduce transmission to the operator. However, even with such technology,
Since the noise from the exhaust fan 19 could not be sufficiently reduced, how to reduce the noise from the exhaust fan 19 remained as an issue.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a paint booth of various types, in particular, a noise generated from an exhaust fan is absorbed and shielded in a paint booth to improve a work environment for a painter and to improve a work environment for an exhaust duct. It is an object of the present invention to provide a sound absorbing and sound insulating structure for reducing noise emission to the outside.

[0008]

According to the present invention, there is provided a paint booth for sucking a paint mist together with an air flow sucked by an exhaust fan and collecting the paint mist. A sound absorbing structure of a painting booth in which a cylinder provided with a sound absorbing material on the inner periphery is provided below a fan hole to be connected, or a tube provided with a sound absorbing material on the inner periphery is provided above a fan hole for connecting the exhaust fan. It is. Further, a sound insulating plate provided with a sound absorbing material was provided below the fan hole of the exhaust fan.

Further, in a wet coating booth in which a paint mist is sucked together with an air flow sucked from a suction port provided at a lower portion of the processing tower by an exhaust fan and the paint mist is collected by gas-liquid contact with a liquid, A sound absorbing material was attached to the front, rear, left and right inner wall surfaces and the ceiling inner surface of the upper part of the processing tower.

Alternatively, a paint mist is sucked together with an air flow sucked from a paint mist collecting member disposed in front of the processing tower by an exhaust fan, and the collecting member collects the paint mist. In the above, a sound absorbing material was provided on the left and right inner wall surfaces and the inner surface of the ceiling after the treatment tower. In addition, the paint fan is sucked together with the air flow sucked from the paint mist collecting member provided in the front part of the processing tower by the exhaust fan,
In a dry coating booth in which the collecting member collects the paint mist, a sound insulating plate provided with a sound absorbing material between the collecting member and a fan hole formed to connect the exhaust fan to the coating booth. Was arranged. Further, a sheet material having a sound absorbing property is disposed on the surface of the above sound absorbing material in a replaceable manner.

[0011]

Embodiments of the present invention will be described in detail with reference to the drawings. 1, 2, 3, 4, 5, and 6
Is a coating booth in which an air flow suction port is provided at the lower part of the processing tower, such as a coating booth shown in FIG. 11 or a shower booth shown in FIG. 10A and a venturi booth shown in FIG. FIG. 3 is a diagram in which a processing tower has a sound absorbing and sound insulating structure in order to reduce noise generated from an exhaust fan. FIGS. 7 and 8 show a coating booth in which an air flow suction port is provided in front of the processing tower such as the dry-type coating booth shown in FIG. -It is the figure which made the sound insulation structure. In the following embodiments, a design change element such as a structure and a shape is included without departing from the scope of the claims.

FIG. 1 shows the coating booth shown in FIG.
As in the shower booth shown in FIG. 10A and the venturi booth shown in FIG. 10B, the inside of the processing tower of the coating booth in which the suction port of the air flow is provided at the lower part of the processing tower has a sound absorbing and sound insulating structure. FIG. A fan hole 2 formed in the upper part of the painting booth to connect the exhaust fan 21 to the processing tower 20
2A and 2B show a state in which the exhaust fan 21 is sucking the airflow, wherein FIG. 2A is a cross-sectional view of a main part of the front, and FIG. In order to prevent the rotation noise and wind noise generated by the exhaust fan 21 from resonating inside the processing tower 20 or being transmitted directly to the worker from the suction port provided at the lower part of the processing tower 20, a sound absorbing material is used. 23 and the sound insulation plate 24 are arranged so as to surround the fan hole 22. The sound absorbing material 23 is a processing tower 2
It is attached to the inner surface above the eliminator 25, ie, the ceiling inner surface, left and right inner surfaces, and front and rear inner surfaces. Also, mounting plate 2
The sound insulating plate 24 with the sound absorbing material 24a attached to the upper surface of 4b is disposed horizontally just below the fan hole 22. As a result, the rotation noise and wind noise generated by the exhaust fan 21 are reduced by the sound absorbing material 23.
Is absorbed by the sound absorbing material 24a, so that sound absorption and sound insulation can be performed near the noise source.

FIG. 2, FIG. 3 and FIG. 4 show that the suction port of the air flow absorbs the sound inside the processing tower of the coating booth provided at the lower part of the processing tower.
FIGS. 7A and 7B are views of another embodiment having a sound insulation structure, in which FIG. 7A is a cross-sectional view of a main part of the front, and FIG. In FIG. 2, the processing tower 20
An exhaust fan 21 is disposed above the fan hole 2.
2, a tube 26 having a sound absorbing material 26a attached to the inner periphery thereof is concentrically disposed, and a sound absorbing material 2 is provided on the upper surface of a mounting plate 27b.
The sound insulating plate 27 with the attached 7a is located directly below the fan hole 22.
It is arranged horizontally at a position where the suction resistance does not increase significantly. In FIG. 3, a cylinder 28 having a sound absorbing material 28 a attached to the inner periphery thereof is disposed concentrically right above the fan hole 22 of the processing tower 20.
An exhaust fan 21 is provided thereon. further,
A sound insulating plate 29 in which a sound absorbing material 29a is mounted on the upper surface of a mounting plate 29b is horizontally arranged directly below the fan hole 22.

FIG. 4 is a sectional view of (A) a main portion of a front view and (B) a side sectional view of a configuration obtained by combining FIGS. 2 and 3, with the inner circumference just above the fan hole 22 of the processing tower 20. Sound absorbing material 30a
Is mounted concentrically and an exhaust fan 21 is disposed thereon. Further, immediately below the fan hole 22, a cylinder 3 having a sound absorbing material 31a attached to its inner periphery.
1 are arranged concentrically, and a sound insulating plate 32 having a sound absorbing material 32a attached to the upper surface of a mounting plate 32b is horizontally arranged directly below the fan hole 22. The cylinder 26, 28.3 shown here
The sectional shape of 0.31 is not limited to a round shape, a square shape, a polygonal shape, or the like. Also, sound insulation plates 27, 29.3
2 is also preferably a shape that matches the cross-sectional shape of the cylinders 26, 28, 30, and 31, and is preferably increased as long as it does not affect the air resistance. 1 and 2 and 3
The sound absorbing / sound insulating structure may be strengthened by combining the structures in FIG. In addition, the arrangement structure of the sound absorbing material and the sound insulating plate is not limited to the above, and the design may be appropriately changed depending on the type of the painting booth.

5A and 5B are a sectional view of a main part of a front view and a sectional view of a side view, respectively, in which a processing tower 36 of a shower booth has a sound absorbing / sound insulating structure. Above the eliminator 35, just below the fan hole 33a of the exhaust fan 33, the sound absorbing material 3
While the cylinder 37 to which 7a is attached is arranged concentrically,
Further, a sound insulating plate 38 in which a sound absorbing material 38a is mounted on the upper surface of the mounting plate 38b is disposed horizontally just below the fan hole 33a. A sound absorbing material is also provided on the inner peripheral ceiling of the processing tower 36.

FIG. 6 shows a processing tower 39 having a plurality of exhaust fans 21.
(A) is a diagram in which a sound absorbing material 40 is attached inside a processing tower 39 for a plurality of exhaust fans 21 and a sound insulating plate 41 is further provided. (B) is a diagram in which the cylinders 42 of the plurality of exhaust fans 21 are individually arranged concentrically, and the sound insulation plate 43 is horizontally arranged directly below the fan holes 22. Also in this case, another sound absorbing / sound insulating structure is shown in FIG.
As shown in FIG. 6B, they can be arranged integrally or individually.

FIG. 7 is a sectional view of an essential part of the front of an example showing a sound absorbing / sound insulating structure attached to a baffle plate type dry coating booth. In (A), just below the fan hole 44, the sound absorbing material 4
A tube 45 to which 5a is attached is disposed concentrically, and a sound insulation plate 46 having a sound absorbing material attached to the upper surface is horizontally disposed directly below the fan hole 44. In (B), a cylinder 47 having a sound absorbing material attached to the inner periphery is disposed concentrically right above the fan hole 44, and a tube 48 having a sound absorbing material attached to the inner periphery is concentrically located directly below the fan hole 44. It is arranged in.

FIG. 8 is another structural example showing a sound absorbing / sound insulating structure attached to a baffle plate type dry coating booth. In this case, since the front surface of the processing tower is open, the sound absorbing material 49 is first attached to the back surface, the side surface, and the inner surface of the ceiling of the processing tower. Immediately after the baffle plate 1 and the filter 2, the plurality of sound insulation plates 50 and 51 are tilted from the filter 23 so that the sound insulation plates 50 and 51 are positioned so as not to block the intake of the exhaust fan 27 and that the noise of the exhaust fan 27 is easily absorbed. It is to be attached.
In this example, the sound absorbing material 49 provided on the back and side surfaces is arbitrarily selected, such as being provided only on the upper portion or being provided partially. Also, the sound insulation plates 50 and 51
Is drawn with two examples, but is not limited to two, one or three or more may be attached, and a plurality of sound insulation plates are inclined in a louver shape. They may be arranged vertically.

As the sound absorbing material, a sponge-like sound absorbing material, a fibrous sound absorbing material, or the like can be used. However, the sound absorbing material needs to be a material that does not deteriorate even when it comes in contact with some paint mist or organic solvent vapor. It may be attached to the inner surface of the cylinder or the mounting plate of the sound insulation plate with an adhesive or the like, fixed with a nail, or pressed down with a wire mesh. Also, since the sound absorbing material is attached inside the treatment tower after the paint mist treatment, the paint mist adheres to the surface, albeit very little, so it will adhere to the surface of the sound absorbing material for a long period of time, reducing the sound absorbing effect I do. In order to prevent the reduction of the sound absorbing effect, the surface of the sound absorbing material is covered with a sound absorbing sheet such as a nonwoven fabric, and the performance can be maintained for a long period of time by replacing and replacing the sheet periodically depending on the degree of adhesion of the paint mist.

[0020]

As described above, in various types of coating booths, a sound absorbing material is provided on the inner wall of the processing tower of the coating booth, or a cylinder or a sound insulating plate provided with the sound absorbing material is disposed to exhaust air. The noise from the fan is absorbed and blocked inside the painting booth, which reduces the noise emitted from the suction port of the painting booth and improves the work environment for painting. In addition, since noise from the exhaust fan is absorbed and shielded inside the painting booth, resonance inside the processing tower is reduced, so that noise emission to the exhaust duct is also reduced. In addition, due to the structure that can be installed corresponding to various types of paint booths such as a dry paint booth and a wet paint booth, an effective sound absorbing and sound insulating effect can be obtained without a significant design change.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a sound absorbing / sound insulating structure in which a sound absorbing material is attached to an inner wall of a processing tower.

FIG. 2 is a schematic view of a sound absorbing / sound insulating structure in which a cylinder provided with a sound absorbing material below a fan hole is provided.

FIG. 3 is a schematic diagram of a sound absorbing / sound insulating structure in which a cylinder provided with a sound absorbing material on a fan hole is arranged.

FIG. 4 is a schematic diagram of a sound-absorbing / sound-insulating structure in which a cylinder provided with a sound absorbing material above and below a fan hole is arranged.

FIG. 5 is a schematic diagram of a sound absorbing / sound insulating structure in which a tube provided with a sound absorbing material is provided below a fan hole of a shower booth.

FIG. 6 is a schematic diagram of a sound absorbing / sound insulating structure when a plurality of exhaust fans are provided in a processing tower.

FIG. 7 is a schematic diagram of a sound absorbing / sound insulating structure attached to a baffle plate type dry coating booth.

FIG. 8 is a schematic diagram of a sound absorbing and sound insulating structure attached to a baffle plate type dry painting booth.

FIG. 9 is a schematic view of a conventional dry coating booth.

FIG. 10 is a schematic view of a conventional wet washing booth, and FIG.
Shower booth and (B) venturi booth.

FIG. 11 is a schematic view of a conventional painting booth having a silent structure.

[Description of Signs] 3.21.33 Exhaust Fan 20.36.39 Processing Tower 22.33a.44 Fan Hole 23.24a.26a.27a.28a.29a.31
a Sound absorbing material 24, 27, 29, 32, 38, 41, 43, 46 Sound insulation plate

Claims (7)

[Claims] 1. A paint booth for sucking a paint mist together with an air flow sucked by an exhaust fan and collecting the paint mist under a fan hole formed for connecting the exhaust fan to the paint booth. A sound absorbing structure for a painting booth, characterized by having a cylinder with a sound absorbing material attached to the inner circumference. 2. A paint booth for sucking paint mist together with an air flow sucked by an exhaust fan and collecting the paint mist, wherein a fan hole formed to connect the exhaust fan to the paint booth and the exhaust hole are provided. A sound absorbing structure for a painting booth, characterized by having a tube with a sound absorbing material attached to the inner periphery between the fan and the fan. 3. A wet painting booth in which a paint mist is sucked together with an air flow sucked from a suction port provided at a lower portion of the processing tower by an exhaust fan, and the paint mist is collected by gas-liquid contact with a liquid. A sound absorbing material for a painting booth, wherein sound absorbing materials are provided on front, rear, left and right inner wall surfaces and an inner surface of a ceiling in an upper part of the inside of the processing tower. 4. A sound absorbing structure for a coating booth according to claim 1, wherein a sound insulating plate provided with a sound absorbing material is provided below said fan hole. 5. A dry coating booth in which a paint mist is sucked together with an air flow sucked from a paint mist collecting member disposed in front of the processing tower by an exhaust fan, and the collecting member collects the paint mist. The sound absorbing structure of a coating booth according to any one of claims 1 to 3, wherein sound absorbing materials are provided on left and right inner wall surfaces and a ceiling inner surface after the processing tower. 6. A dry coating booth in which a paint mist is sucked together with an air flow sucked from a paint mist collecting member disposed in front of the processing tower by an exhaust fan, and the collecting member collects the paint mist. The sound absorbing structure of a coating booth, wherein a sound insulating plate provided with a sound absorbing material is disposed between the collection member and a fan hole formed to connect the exhaust fan to the coating booth. 7. The sound absorbing material according to claim 1, wherein a sheet material having a sound absorbing property is exchangeably disposed on a surface of the sound absorbing material. 6. The sound absorbing structure of the coating booth according to 6.