Coating device

Abstract

Provided is a coating device in which a path of air containing coating mist from a coating room to a removal device is non-linear. A coating device (10) is provided with: a coating chamber (20) for coating a coating material on an object (B) to be coated, the coating chamber (20) being provided with an opening (26) for discharging air containing a coating material mist in the center of the lower surface of the coating chamber (20) in the width direction (W) orthogonal to the conveying direction of the object (B) to be coated in the horizontal direction; a removal device (30) that is disposed below the coating chamber (20) and in a region where the coating chamber (20) is located in the width direction (W), and that removes the coating mist by introducing air containing the coating mist from the coating chamber (20); and a first communication path (41) that communicates the opening (26) and the removal device (30), the removal device (30) having an air introduction port (311) that communicates with the first communication path (41) at a position further outward than the opening (26) in the width direction (W), and that introduces air containing the paint mist from the first communication path (41).

Description

Technical Field

[0001] The present invention relates to a coating device provided with a removal device for removing paint mist in a lower space of a coating room. Background Art

[0002] Generally, a coating device is known that utilizes the space below the coating room to configure a removal device for removing the paint mist contained in the air exhausted from the coating room. For example, Japanese Patent Publication No. 2019-217502 (Patent Document 1) discloses a coating device having the following structure: directly below the coating chamber, two filter components are respectively contained in the filter component containers and are arranged opposite to each other with the center plane of the vertical long side direction of the coating chamber as the reference.

[0003] In Patent Document 1 Figure 1 In the described coating device, the air inlet of the main filter device of each filter assembly is arranged on the side away from the central plane of the vertical long side direction of the coating chamber (that is, the outer side in the width direction of the coating chamber), and the air discharged from the bottom plate of the coating chamber passes through the air inlet provided above the air inlet on the top of the filter assembly container, and is fed into the main filter device from the air inlet.

[0004] On the other hand, in the coating device described in Figure 11 of Patent Document 1, the air inlet of the main filter device of each filter assembly is arranged on the side of the center plane side of the vertical long side direction of the coating chamber (that is, the inner side in the width direction of the coating chamber), and the air discharged from the bottom plate of the coating chamber passes through the passage between the two main filter devices arranged opposite to each other, and is sent into the main filter device from the air inlet.

[0005] However, in the coating device described in Patent Document 1, the bottom plate of the coating chamber is configured to be fully ventilated. Figure 1 When operating, the coating device described in Patent Document 1 and FIG. 11 will form a roughly linear air path from the portion of the bottom plate of the coating chamber that is roughly directly above the air inlet of the main filter device to the air inlet. Such a roughly linear air path has little resistance to flow, so changes in the air volume generated in a part of the path are easily reflected in the entire path. Therefore, in the coating device described in Patent Document 1, when the processing air volume of the main filter device is reduced due to blockage, etc., the airflow in the coating chamber is easily disturbed, which may cause the quality of the coating operation to be reduced.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2019-217502 Summary of the invention

[0009] Problems to be solved by the invention

[0010] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a coating device in which the path of air containing paint mist from a coating room to a removal device is non-linear.

[0011] Solutions for solving problems

[0012] The coating device of the present invention is characterized by comprising:

[0013] A coating room is used to coat the conveyed object with coating paint, and an opening for discharging air containing coating mist is provided on the lower surface of the coating room and in the center of the width direction which is orthogonal to the conveying direction of the object in the horizontal direction;

[0014] a removal device disposed below the painting room and in an area where the painting room is located in the width direction, for introducing air containing paint mist from the painting room and removing the paint mist; and

[0015] a first communication passage connecting the opening and the removal device,

[0016] The removal device includes an air introduction port that communicates with the first communication passage at a position outside the opening in the width direction and introduces air containing the paint mist from the first communication passage.

[0017] Effects of the Invention

[0018] In the coating device thus constructed, the air containing the paint mist discharged from the opening of the coating room is guided outward in the width direction and flows downward while reaching the air inlet of the removal device, so the path of the air containing the paint mist from the coating room to the removal device becomes a non-linear path with large resistance to flow. Therefore, even if the processing air volume of the removal device is reduced, the impact on the air flow in the coating room will be alleviated, so it is difficult to generate turbulence of the air flow in the coating room, which can suppress the reduction of the quality of the coating operation.

[0019] Further features and advantages of the present invention will become more apparent from the following description of illustrative and non-limiting embodiments thereof, which is explained with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram showing a schematic configuration of a coating device.

[0021] Figure 2 This is a schematic cross-sectional view of the coating device according to the first embodiment when the removal device is located in the operating position.

[0022] Figure 3 This is a schematic cross-sectional view of the coating device according to the first embodiment when the removal device is located in the non-operating position.

[0023] Figure 4 This is a schematic cross-sectional view of the coating device according to the second embodiment when the removal device is located in the operating position.

[0024] Figure 5 This is a schematic cross-sectional view of the coating device according to the second embodiment when the removal device is located in the non-operating position.

[0025] Description of reference numerals:

[0026] 10: coating device; 20: coating room; 21: coating chamber; 26: opening; 30: removal device; 40: lower space; 41: first communication path; 311: air inlet; B: object to be coated; T: conveying direction; W: width direction. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the coating device of the present invention will be described with reference to the drawings.

[0028] [First embodiment]

[0029] Figure 1 This is a schematic diagram showing the general structure of a coating device. Figure 1 As shown, the coating device 10 includes a coating room 20 having a coating chamber 21 for coating an object B such as a car body with a coating paint, and a removal device 30 for removing the coating mist contained in the air exhausted from the coating chamber 21 .

[0030] The coating room 21 of the coating room 20 is provided with a plurality of coating zones Z1, Z2, Z3, ... according to the coating process in the conveying direction T of the coating object B. The coating object B is conveyed to these coating zones Z1, Z2, Z3, ... in the order of the coating process by a conveying device 23 such as a conveyor. The coating object B conveyed to each coating zone Z1, Z2, Z3, ... is sprayed with a predetermined coating by a spraying device 24 provided on the side wall of the coating room 20, etc.

[0031] On the upper surface of the coating room 20, supply ports 25 for supplying external air are provided in each coating zone Z1, Z2, Z3, ... By supplying external air from the supply ports 25, a downward airflow from the upper side to the lower side is formed in each coating zone Z1, Z2, Z3, ... The air containing the paint mist that is not attached to the coating object B passes through the grille bottom plate 22 and is guided to the bottom of the coating room 21.

[0032] On the other hand, on the lower surface of the painting room 20, an opening 26 for exhausting the air in the painting room 21 is provided one by one in each painting zone Z1, Z2, Z3, ... The opening 26 is arranged in the central part of the width direction W which is orthogonal to the conveying direction T of the coated object B in the horizontal direction, and extends along the conveying direction T. The portion of the lower surface of the painting room 20 which is closer to the outside of the width direction W than the opening 26 is a bottom plate surface through which air is not allowed to pass. It should be noted that the central part mentioned here refers to an area which is arranged on the left and right sides with the imaginary center line C of the coating device 10 in the width direction W, and has a width of about 1% to 50% of the width of the lower surface of the painting room 20 in the width direction W. The opening 26 is connected to the first connecting passage 41 described later.

[0033] It should be noted that by controlling the air volume of external air supplied from the supply port 25 of the painting room 20 by a control device not shown in the figure, the flow rate of the downward airflow formed in each painting area Z1, Z2, Z3... can be adjusted to have the same flow rate between the painting areas Z1, Z2, Z3..., or to have an appropriate flow rate in each painting area Z1, Z2, Z3... according to the painting process.

[0034] Below the painting room 20, a lower space 40 is provided for each painting zone Z1, Z2, Z3, ... Each lower space 40 has a length substantially equivalent to the size of the painting room 21 in the width direction W, and has a length substantially equivalent to the size of the corresponding painting zone Z1, Z2, Z3, ... in the conveying direction T. In other words, each painting zone Z1, Z2, Z3, ... of the painting room 21 and the lower space 40 located thereunder have substantially the same shape in a top view.

[0035] Figure 2 This is a schematic cross-sectional view of the coating device according to the first embodiment when the removal device is located in the operating position. Figure 3 1 is a schematic cross-sectional view of the coating apparatus of the first embodiment when the removal device is in a non-operating position. In each lower space 40, a plurality of (five in this embodiment) removal devices 30 are arranged in parallel along the conveying direction T. Each removal device 30 can move along the width direction W to Figure 2 The operating position shown and Figure 3The non-operating position shown. Here, the operating position refers to a position where air containing paint mist is introduced into the removal device 30 and the paint mist is removed from the air. The non-operating position refers to a position where air containing paint mist is not introduced into the removal device 30 and the removal device 30 is maintained by an operator. In the present embodiment, the operating position and the non-operating position of the removal device 30 are positions on opposite sides of the imaginary center line C. However, the operating position of the removal device 30 may also be a position overlapping with the imaginary center line C, in which case the removal device 30 at the operating position straddles the imaginary center line C. In addition, the non-operating position of the removal device 30 may also be a position overlapping with the imaginary center line C, in which case the removal device 30 at the non-operating position straddles the imaginary center line C.

[0036] Next, an operator located outside the non-operating position of the removal device 30 in the width direction W (see Figure 3 ) observation, the operating position side of the removal device 30 is called the inner side of the width direction W, and the non-operating position side of the removal device 30 is called the front side of the width direction W, and the structure of the removal device 30 is explained.

[0037] Each removal device 30 has a housing 31 with casters and a primary filter element 321, a secondary filter element 322, and a tertiary filter element 323 arranged in the housing 31 and removing paint mist from the air. The housing 31 has: an air inlet 311, which is arranged on the side surface of the inner side in the width direction W, and introduces air containing paint mist; and an air outlet 312, which is arranged on the front side of the width direction W in the upper surface, and discharges the air from which the paint mist has been removed. It should be noted that the housing 31 is not limited to a structure with casters, and can also be constructed to be movable in the width direction W by a slide rail or the like.

[0038] The primary filter element 321, the secondary filter element 322, and the tertiary filter element 323 are arranged in such a manner that the air introduced from the air inlet 311 passes through in sequence. In the present embodiment, the primary filter element 321 is a corrugated paper filter arranged near the air inlet 311. The secondary filter element 322 is a kraft paper filter arranged on the front side in the width direction W relative to the primary filter element 321. The tertiary filter element 323 is a bag dust collector arranged on the front side in the width direction W relative to the secondary filter element 322. It should be noted that the number of filter elements and the materials used for the filter elements at each level are arbitrary.

[0039] Each lower space 40 is also provided with: a first communication passage 41, which connects the air inlet 311 and the opening 26 of the coating room 20 for the removal device 30 in the operating position; and a second communication passage 42, which connects the air outlet 312 and the exhaust port 433 described later. As described later, the first communication passage 41 is composed of an upstream flow passage 431, an upstream communication port 46, and an upstream collecting duct 48. In addition, the second communication passage 42 is composed of a downstream duct 49, a downstream communication port 47, and a downstream flow passage 432.

[0040] Each lower space 40 has an upper chamber 43 of a substantially rectangular parallelepiped shape located below the coating chamber 21. The upper chamber 43 is divided into an upstream flow path 431 and a downstream flow path 432 by a partition wall 45 arranged in a substantially central portion in the width direction W and extending along the conveying direction T. The upstream flow path 431 is connected to the coating chamber 21 via the opening 26. On the other hand, the downstream flow path 432 is provided with an exhaust port 433 on the side of the outer side (the front side) in the width direction W. The exhaust port 433 is connected to the primary side of the exhaust fan F.

[0041] Each lower space 40 also has a lower chamber 44 of a substantially rectangular shape located below the upper chamber 43 and provided with a plurality of removal devices 30. The lower chamber 44 is connected to the upper chamber 43 via an upstream connecting port 46 provided at the boundary between the upper chamber 43 and the lower chamber 44. In the present embodiment, a plurality of upstream connecting ports 46 are provided at the outer side (inner side) in the width direction W and at positions separated along the conveying direction T. It should be noted that the plurality of upstream connecting ports 46 may also be provided as an integral structure. Moreover, the lower chamber 44 is connected to the upper chamber 43 via a downstream connecting port 47 provided at the boundary between the upper chamber 43 and the lower chamber 44. In the present embodiment, a plurality of downstream connecting ports 47 are provided at approximately the center of the width direction W and at positions separated along the conveying direction T.

[0042] An upstream collecting duct 48 connected to the upstream communication port 46 is arranged on the top and bottom surfaces of the lower chamber 44. When the removal device 30 is in the operating position, the air inlets 311 are connected to the upstream collecting duct 48 at positions outside (inside) the opening 26 in the width direction W.

[0043] Further, a downstream duct 49 is disposed in the lower chamber 44, which is suspended from the top surface thereof and connected to the downstream communication port 47. When the removal device 30 is located at the operating position, each of the air discharge ports 312 is connected to the downstream duct 49 in common.

[0044] It should be noted that, in the present embodiment, the partition wall 45 has an airflow guide portion 451 for guiding the air containing the paint mist discharged from the opening portion 26 arranged in the central portion in the width direction W to the upstream side flow path 431 to the outside (inside) in the width direction W. The airflow guide portion 451 is arranged directly below the opening portion 26, and is arranged to extend in a straight line in a manner that the farther away from the opening portion 26, the closer to the air inlet 311 connected to the first communication path 41. The upstream side flow path 431 provided with the airflow guide portion 451 has an expansion portion on the outside of the path that linearly connects the opening portion 26 and the upstream side communication port 46, but the area of ​​the surface orthogonal to the path (i.e., the cross-sectional area of ​​the upstream side flow path 431) first expands and then shrinks from the area on the side of the opening portion 26 to the area on the side of the upstream side communication port 46. It should be noted that the airflow guide portion 451 may not be in a straight line shape, but in an arc shape or a step shape.

[0045] Hereinafter, the removal operation of the paint mist when the removal device 30 is located in the operating position and the switching operation of the removal device 30 between the operating position and the non-operating position will be described.

[0046] During the coating operation on the object B, the removal device 30 is kept at Figure 2 In this state, the air containing the paint mist generated in each painting zone Z1, Z2, Z3, ... of the painting room 20 passes through the first communication passage 41 and is sent to the plurality of removal devices 30 provided one by one in each painting zone Z1, Z2, Z3, ...

[0047] The air containing the paint mist is first discharged from the opening 26 of the coating room 20 into the upstream flow path 431, and is guided to the outside (inside) of the width direction W by the airflow guide 451 of the partition wall 45 while flowing to the bottom of the upstream flow path 431. Here, a part of the paint mist is removed from the air by contacting and adhering to the wall surface of the upstream flow path 431. In this embodiment, turbulence such as eddy currents are generated in the upstream flow path 431 due to the change in the cross-sectional area of ​​the upstream flow path 431, so the paint mist contacts and adheres to the wall surface. Through this structure, most of the paint mist is removed from the air. It should be noted that as long as the cross-sectional area of ​​the upstream flow path 431 changes from the area on the side of the opening 26 to the area on the side of the upstream connecting port 46, for example, it can also be reduced or expanded from the area on the side of the opening 26 to the area on the side of the upstream connecting port 46. The paint mist attached to the wall surface of the upstream flow path 431 is cleaned when the coating device 10 is regularly maintained.

[0048] The air containing the paint mist flowing to the bottom of the upstream flow path 431 is discharged from the upstream connecting port 46 into the upstream collecting duct 48, and is sent into each removal device 30 through each air inlet 311. The paint mist is removed from the air by passing through the primary filter element 321, the secondary filter element 322, and the tertiary filter element 323 in the removal device 30. The air from which the paint mist has been removed is discharged from the air outlet 312 of each removal device 30, passes through the second connecting path 42, i.e., the downstream duct 49, the downstream connecting port 47, and the downstream flow path 432, and is discharged from the exhaust port 433 to the outside of the coating device 10.

[0049] On the other hand, when the filter elements 321, 322, 323 in the removal device 30 need to be replaced, the removal device 30 is moved by the operator to Figure 3 The non-operating position shown. In the non-operating position, the air inlet 311 and the air outlet 312 of the removal device 30 are separated from the first connecting passage 41 and the second connecting passage 42, and the connection with these connecting passages is cut off. In the upstream collecting duct 48, a valve component that can be opened and closed is provided one by one for each removal device 30. By closing only the valve corresponding to the removal device 30 that moves to the non-operating position, the flow of air containing paint mist to the removal device 30 located in the operating position is maintained. Therefore, even during the period when the removal device 30 that needs to replace the filter elements 321, 322, 323 moves to the non-operating position, the coating action of the coating device 10 continues. The operator performs maintenance such as replacement of the filter elements 321, 322, 323 through the door provided on the housing 31. Thereafter, the removal device 30 moves to the operating position again and is maintained.

[0050] It should be noted that, in this embodiment, the air inlet 311 of the removal device 30 may also be arranged on the inner side of the width direction W of the upper surface instead of the side of the housing 31. In this case, the operating position of the removal device 30 may also be a position where the air inlet 311 is located below the upstream communication port 46 when the removal device 30 is in the operating position (i.e., Figure 2 The position shown is close to the inner side in the width direction W). Furthermore, when the removal device 30 is in the operating position, the air inlet 311 is connected to the upstream flow path 431 via the upstream collecting duct 48, which is suspended from the top surface of the lower chamber 44 and connected to the upstream communication port 46.

[0051] [Second embodiment]

[0052] Figure 4 This is a schematic cross-sectional view of the coating device according to the second embodiment when the removal device is located in the operating position. Figure 5The coating device 10 of this embodiment has substantially the same structure as the first embodiment except for the removal device 30, the first communication passage 41 and the second communication passage 42, and the description of the same structure is omitted below.

[0053] In this embodiment, if Figure 4 As shown, the housing 31 of the removal device 30 has: an air inlet 311, which is arranged on the upper surface; and an air outlet 312, which is arranged at the lower part of the side surface on the inner side in the width direction W. In the housing 31, a primary filter element 321, a secondary filter element 322, and a tertiary filter element 323 are arranged in sequence from the vicinity of the air inlet 311 toward the bottom in such a manner that the air containing the paint mist sent from the air inlet 311 can pass through.

[0054] Furthermore, in the present embodiment, an upstream collecting duct 48 is provided in the lower chamber 44, which is suspended from the top surface thereof and connected to the upstream connecting port 46. In addition, an exhaust port 441 and a downstream duct 49 connected to the exhaust port 441 are provided on the side surface of the outer side (inner side) of the width direction W of the lower chamber 44. The exhaust port 441 is connected to the primary side of the exhaust fan F. When the removal device 30 is in the operating position, each air inlet 311 is connected to the upstream collecting duct 48 in common, and each air outlet 312 is connected to the downstream duct 49 in common.

[0055] In the coating device 10 of the present embodiment thus constructed, the air containing the paint mist passes through the first connecting passage 41 formed by the upstream flow passage 431, the upstream connecting port 46, and the upstream collecting duct 48, and is sent into each removal device 30 from each air inlet 311. The air containing the paint mist flows from the top to the bottom in the removal device 30, and the paint mist is removed by the primary filter element 321, the secondary filter element 322, and the tertiary filter element 323. The air from which the paint mist has been removed is discharged from the air outlet 312 of each removal device 30, passes through the second connecting passage 42 formed by the downstream duct 49, and is discharged to the outside of the coating device 10 from the exhaust port 441.

[0056] Furthermore, in the coating device 10 of the present embodiment, Figure 5 As shown, by having an operator move the removal device 30 to the non-operating position in the lower space 40 , maintenance such as replacement of the filter elements 321 , 322 , 323 can be performed.

[0057] It should be noted that, in this embodiment, the air outlet 312 of the removal device 30 may also be arranged on the lower surface instead of the side of the housing 31. In this case, the exhaust port 441 for exhausting air to the outside of the coating device 10 and the downstream side duct 49 connecting the exhaust port 441 and the air outlet 312 are provided on the lower surface of the lower chamber 44.

[0058] The characteristic configurations of the coating apparatus 10 according to the first embodiment and the second embodiment have been described above. Next, the advantages of these characteristic configurations will be described.

[0059] In the coating apparatus 10 of the first embodiment and the second embodiment, the path of the air containing the paint mist from the coating room 20 to the removal device 30 (i.e., the first communication path 41) is a non-linear path with large resistance to flow. Therefore, even if the processing air volume of the removal device 30 is reduced due to clogging of the filter elements 321, 322, 323, etc., the influence on the air flow in the coating room 20 is also alleviated, so it is difficult to cause turbulence of the air flow in the coating room 20.

[0060] In addition, the removal devices 30 provided one by one for each coating zone Z1, Z2, Z3, ... are connected to the opening 26 of the coating room 20 via a common first communication passage 41. Therefore, even if the processed air volume is reduced in a part of the removal devices 30, the reduced processed air volume can be supplemented by other removal devices 30, so the influence of the reduced processed air volume of the removal devices 30 on the air flow in the coating room 20 can be suppressed.

[0061] In addition, since the removal device 30 is provided only on one side of the lower space 40 relative to the imaginary center line C of the coating device 10, the space on the opposite side of the lower space 40 can be used for maintenance of the removal device 30. Thus, it is not necessary to provide a space for maintenance of the removal device 30 outside the lower space 40 in the width direction W. That is, the area required for installing the coating device 10 can be reduced.

[0062] In addition, the primary filter element 321, the secondary filter element 322, and the tertiary filter element 323 are centrally arranged in parallel in the housing 31 along the width direction W. Compared with the case where spaces for configuring the filter elements are respectively provided in the upper and lower directions, the height dimension of the flow path for the air containing the paint mist in the upper and lower directions can be reduced, thereby reducing the parts that are difficult for the operator's hands to reach, so that the maintenance of the flow path becomes easy. In addition, the overall filter elements 321, 322, 323 can be moved together, so the maintenance of the filter elements 321, 322, 323 also becomes easy.

[0063] In addition, the upstream flow path 431 has a shape with a changing cross-sectional area, so that the above-mentioned turbulence such as eddy currents can be induced to make more paint mist contact and adhere to the wall surface. As a result, the paint mist contained in the air sent to the removal device 30 is reduced, so the amount of paint mist adhering to the filter elements 321, 322, 323 is reduced, and as a result, the life of the filter elements 321, 322, 323 until replacement is extended.

Claims

1. A coating device, characterized in that: have: A coating room is used to coat the conveyed object with coating paint, and an opening for discharging air containing coating mist is provided on the lower surface of the coating room and in the center of the width direction which is orthogonal to the conveying direction of the object in the horizontal direction; a removal device, arranged below the painting room and in the area where the painting room is located in the width direction, for introducing air containing paint mist from the painting room and removing the paint mist; as well as a first communication passage connecting the opening and the removal device, The removal device includes an air introduction port that communicates with the first communication passage at a position outside the opening in the width direction and introduces air containing the paint mist from the first communication passage.

2. The coating device according to claim 1, characterized in that: In the removing device, air flows from the outer side to the inner side in the width direction.

3. The coating device according to claim 2, characterized in that: The removal device comprises: an air outlet, which is arranged on the upper surface of the removal device and discharges the air from which the paint mist has been removed; The coating device further comprises: An exhaust fan discharges the air discharged from the air outlet to the outside of the coating device; A second communication passage, for communicating from the air outlet to the exhaust fan; and The partition wall partitions the first communication passage and the second communication passage.

4. The coating device according to claim 3, characterized in that: The partition wall includes an air flow guide portion for guiding the air containing the paint mist exhausted from the opening portion toward the outside in the width direction.

5. The coating device according to claim 1, characterized in that: The air inlet is arranged on the upper surface of the removal device.

6. The coating device according to claim 5, characterized in that: The removal device has an air outlet, which is arranged on the lower surface of the removal device or on the side surface in the width direction, and discharges the air from which the paint mist has been removed. The coating device further comprises: an exhaust fan for discharging the air discharged from the air outlet to the outside of the coating device; and The second communication passage is used to communicate from the air outlet to the exhaust fan.

7. The coating device according to claim 6, characterized in that: Also available: The air flow guide portion guides the air containing the paint mist exhausted from the opening portion toward the outside in the width direction.

8. The coating device according to any one of claims 1 to 7, characterized in that: The removal device has a filter element consisting of a corrugated paper filter.

9. The coating device according to any one of claims 1 to 7, characterized in that: The removal device can move between an operating position and a non-operating position along the width direction in the area where the painting room is located, In the operating position, the air inlet is connected to the first communication passage. In the non-operating position, the air introduction port is separated from the first communication passage.

10. The coating device according to claim 9, characterized in that: The operating position and the non-operating position are located on opposite sides of each other with respect to a virtual center line of the painting booth in the width direction.

11. The coating device according to any one of claims 1 to 7, characterized in that: The first communication passage has a region between the region on the opening side and the region on the air inlet side having a cross-sectional area different from that of at least one of the region on the opening side and the region on the air inlet side.

12. The coating device according to any one of claims 1 to 7, characterized in that: A plurality of the removal devices are arranged in parallel along the conveying direction, The first communication passage communicates the air introduction ports of the plurality of removal devices with the opening of the painting room.

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