Paint booth

Abstract

Efficiently exhausts atomized paint generated during painting. [Solution] The paint booth 10 paints an object to be painted with paint sprayed from a spray nozzle 123 within a painting space 11 partitioned by an upper wall 11A, a front wall 11C, and a rear wall 11D. An air intake port 19 is formed in the upper wall 11A for supplying air to the painting space 11. An exhaust port 20 is formed in the rear wall 11D for discharging air from the painting space 11. The air intake port 18 is located closer to the front wall 11C than the area in the painting space 11 where the spray nozzle 123 is positioned when paint is sprayed from the spray nozzle 123.

Description

Technical Field

[0001] The present disclosure relates to a painting booth.

Background Art

[0002] Patent Document 1 discloses a painting booth in which paint is sprayed onto an object to be painted by an injection nozzle in a space partitioned by an upper wall, a lower wall, and side walls. An air supply port for supplying air into the painting booth is formed integrally in the upper wall, and an exhaust port for discharging air from the painting booth is formed in the lower wall. By forming an air flow from the air supply port to the exhaust port in the painting booth, atomized paint floating in the painting booth is discharged.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] It is required to efficiently exhaust atomized paint generated during painting.

Means for Solving the Problems

[0005] A first exemplary aspect provided by the present disclosure is a painting booth in which paint is sprayed onto an object to be painted by an injection nozzle in a space partitioned by an upper wall, a first side wall, and a second side wall facing the first side wall, an air supply port for supplying air to the space is formed in the upper wall, an exhaust port for discharging air from the space is formed in the second side wall, the air supply port is located closer to the first side wall than a region where the injection nozzle is disposed when paint is sprayed from the injection nozzle in the space.

[0006] A second embodiment provided by this disclosure is a paint booth in which paint is sprayed onto an object to be painted by a spray nozzle within a space partitioned by an upper wall, a first side wall, and a second side wall opposite the first side wall, An air inlet is formed in the upper wall for supplying air to the space. An exhaust port for discharging air from the space is formed in the second side wall. The air intake is located closer to the first side wall than the area in the space where the spray nozzle is positioned when paint is sprayed from the spray nozzle.

[0007] To exhaust atomized paint that floats in the space inside the paint booth without adhering to the object being painted, an airflow is formed from the air intake to the exhaust port. When an airflow is formed from top to bottom by supplying air from the upper wall that partitions the space inside the paint booth and exhausting it from the lower wall, some of the air hits the spray nozzle, causing turbulence in the airflow. Therefore, more air supply is required to generate an airflow towards the exhaust port.

[0008] However, according to the configurations of the first and second embodiments, since the airflow is formed from the upper wall, which is closer to the first side wall than the spray nozzle, toward the second side wall, it is possible to suppress the disruption of the airflow caused by the air supplied into the paint booth hitting the spray nozzle. As a result, the necessary airflow can be formed with less air, and the atomized paint generated during painting can be efficiently exhausted.

[0009] A third embodiment provided by this disclosure is a paint booth in which paint is sprayed onto an object to be painted by a spray nozzle within a space partitioned by an upper wall, a first side wall, and a second side wall opposite the first side wall, A work table for supporting the object to be painted, A cover table that covers a structure located below the work table in the aforementioned space, It is equipped with, An air inlet for supplying air to the space is formed in the space above the area where the spray nozzle is positioned when paint is sprayed from the spray nozzle, and closer to the first side wall than the area. An exhaust port is formed in the second side wall for discharging air from the space.

[0010] A fourth embodiment provided by this disclosure is a paint booth in which paint is sprayed onto an object to be painted by a spray nozzle within a space partitioned by an upper wall, a first side wall, and a second side wall opposite the first side wall, A work table for supporting the object to be painted, A cover table that covers a structure located below the work table in the aforementioned space, It is equipped with, An air inlet for supplying air to the space is formed in the space above the area where the spray nozzle is located when paint is sprayed from the spray nozzle, and closer to the first side wall than the area. An exhaust port is formed in the second side wall for discharging air from the space.

[0011] When air supplied into the paint booth flows below the work table, atomized paint carried by the airflow adheres to structures located below the work table. However, according to the configurations of the third and fourth embodiments, the structures located below the work table are covered by the cover table, thus preventing atomized paint from adhering to those structures.

[0012] Furthermore, since the airflow is formed from above the spray nozzle and close to the first side wall towards the second side wall, it is possible to suppress turbulence in the airflow caused by the air supplied to the paint booth hitting the spray nozzle. As a result, the necessary airflow can be formed with less air, allowing for efficient exhaust of atomized paint generated during painting. [Brief explanation of the drawing]

[0013] [Figure 1] An example of the configuration of a painting booth according to an embodiment is illustrated. [Figure 2] A cross-section viewed from the arrow direction along line II-II in FIG. 1 is illustrated. [Figure 3] Another example of the configuration of the painting booth is shown.

Mode for Carrying Out the Invention

[0014] With reference to the accompanying drawings, examples of embodiments will be described in detail below. In each of the drawings used in the following description, the scale is appropriately changed in order to make each element recognizable in size. In the accompanying drawings, arrow F indicates the front direction of the illustrated structure. Arrow B indicates the rear direction of the illustrated structure. Arrow U indicates the upward direction of the illustrated structure. Arrow D indicates the downward direction of the illustrated structure. Arrow R indicates the right direction of the illustrated structure. Arrow L indicates the left direction of the illustrated structure. These expressions related to directions are intended to be used for convenience of explanation and are not intended to limit the posture of the structure during actual use.

[0015] FIG. 1 illustrates the configuration of a painting booth 10 according to an example of an embodiment. FIG. 2 illustrates a cross-section viewed from the arrow direction along line II-II in FIG. 1.

[0016] The painting booth 10 includes a painting space 11. As illustrated in FIGS. 1 and 2, the painting space 11 is partitioned by an upper wall 11A, a lower wall 11B, a front wall 11C, a rear wall 11D, a right wall 11E, and a left wall 11F. In the painting space 11, paint is sprayed onto an object to be painted (not shown) for painting. The front wall 11C is an example of a first side wall. The rear wall 11D is an example of a second side wall.

[0017] As illustrated in FIG. 1, the painting booth 10 includes a painting machine 12. The painting machine 12 is disposed within a painting space 11. The painting machine 12 includes a base 121, an arm 122, and a spray nozzle 123. The arm 122 is attached to the base 121. The spray nozzle 123 is attached to the tip of the arm 122.

[0018] The painting machine 12 is, for example, a robot that three-dimensionally automatically paints the surface of an object to be painted. For example, when the arm 122 operates according to a preset operation program by a drive mechanism (not shown), the relative position between the spray nozzle 123 and the object to be painted changes. Paint is sprayed from the spray nozzle 123 that has moved to a predetermined position, and the surface of the object to be painted is painted.

[0019] The painting booth 10 includes a mounting portion 13 for mounting the painting machine 12. For example, the mounting portion 13 is formed in the painting space 11 in a region close to the upper wall 11A on the upper wall 11A, or on the left wall 11F or the right wall 11E. The painting machine 12 is mounted to the mounting portion 13 in a suspended state.

[0020] The painting booth 10 includes an object-to-be-painted table 14 on which an object to be painted is placed. In this example, two object-to-be-painted tables 14 are disposed within the painting space 11. The object-to-be-painted table 14 has a shaft portion 141. For example, as shown in FIG. 2, the object-to-be-painted table 14 is configured to be rotatable about the rotation axis C1 of the shaft portion 141 by a drive mechanism (not shown).

[0021] The painting booth 10 includes a work table 15 that supports the object-to-be-painted table 14. In this example, as shown in FIG. 1, the object-to-be-painted table 14 is supported by the work table 15 in a state of being separated upward from the work table 15. As illustrated in FIG. 2, the work table 15, for example, has a circular shape in plan view.

[0022] As illustrated in Figure 1, the paint booth 10 is equipped with a drive mechanism 16 for rotating the work table 15. The drive mechanism 16 is located below the work table 15. The work table 15 has a shaft portion 151. As illustrated in Figure 2, the work table 15 is configured to rotate around the rotation axis C2 of the shaft portion 151 by the drive mechanism 16. The drive mechanism 16 is an example of a structure.

[0023] As the worktable 15 rotates, the workpiece tray 14 supported by the worktable 15 moves, for example, between a first position P1 and a second position P2. The first position P1 is the position where painting is performed by the painting machine 12. The second position P2 is the position where the workpiece to be painted is placed on the workpiece tray 14 before painting, or the position from which the painted workpiece is removed from the workpiece tray 14. The first position P1 and the second position P2 are, for example, opposite each other with the center of the worktable 15 in between. That is, as the worktable 15 rotates every 180 degrees, the workpiece tray 14 moves from the first position P1 to the second position P2 or from the second position P2 to the first position P1.

[0024] The paint booth 10 is equipped with a cover table 17. The cover table 17 is positioned between the work table 15 and the front wall 11C, rear wall 11D, right wall 11E, and left wall 11F of the paint space 11. For example, the cover table 17 extends horizontally between the outer edge of the work table 15 and the side wall of the paint space 11. For example, the cover table 17 is positioned such that its vertical position is the same as or near the position of the work table 15. In this example, as shown in Figure 2, the cover table 17 has a circular opening 171 that corresponds to the work table 15 in plan view. The cover table 17 covers structures located below the work table 15.

[0025] The paint booth 10 is equipped with an air supply blower unit 18. The air supply blower unit 18 is located above the paint space 11. The air supply blower unit 18 is configured to draw in air A from outside the paint booth 10. A filter or the like may be placed inside the air supply blower unit 18 to remove foreign matter such as dust contained in the air A.

[0026] The paint booth 10 is equipped with an air intake 19 for supplying air A into the painting space 11. The air intake 19 is formed in the upper wall 11A of the painting space 11. Within the painting space 11, the air intake 19 is located closer to the front wall 11C than the area where the spray nozzles 123 are located. Air A taken in by the air intake blower unit 18 is supplied into the painting space 11 from the air intake 19.

[0027] The paint booth 10 is equipped with an exhaust port 20 for discharging air A from within the paint space 11. The exhaust port 20 is formed in the rear wall 11D of the paint space 11. The air A inside the paint space 11 is discharged outside the paint space 11 through the exhaust port 20. For example, as shown in Figure 1, the exhaust port 20 is positioned such that its lower end is below the workpiece tray 14 and above the work table 15.

[0028] The paint booth 10 is equipped with an exhaust chamber 21. The exhaust chamber 21 is located at the rear of the painting space 11. Air A in the painting space 11 is discharged into the exhaust chamber 21 from the exhaust port 20. A filter or the like may be placed inside the exhaust chamber 21 to remove atomized paint discharged along with the air A.

[0029] The paint booth 10 is equipped with an exhaust blower unit 22. The exhaust blower unit 22 is located above the exhaust chamber 21. Air A discharged from the painting space 11 into the exhaust chamber 21 is then discharged outside the paint booth 10 from the exhaust blower unit 22. For example, the exhaust flow rate of the exhaust blower unit 22 is controlled to be the same as the supply air flow rate of the supply air blower unit 18.

[0030] Air A taken in from the air supply blower unit 18 is supplied into the painting space 11 from the air intake port 19, and air A is exhausted outside the painting space 11 from the exhaust port 20, thereby forming an airflow within the painting space 11 from the air intake port 19 to the exhaust port 20. This airflow carries the atomized paint that floats within the painting space 11 without adhering to the object to be painted to the exhaust port 20, and it is discharged from the painting space 11 into the exhaust chamber 21.

[0031] For example, when air is supplied from the upper wall 11A of the painting space 11 and exhausted from the lower wall 11B to form an airflow from top to bottom, some of the air A hits the spray nozzle 123, causing turbulence in the airflow. Therefore, more air is required to generate an airflow toward the exhaust port 20.

[0032] In contrast, according to the configuration of this embodiment, the air intake 19 is located closer to the front wall 11C than the area where the injection nozzle 123 is located on the upper wall 11A. Therefore, an airflow is formed from in front of and above the injection nozzle 123 towards the rear of the injection nozzle 123. Consequently, it is possible to suppress the disruption of the airflow caused by the air A supplied into the painting space 11 hitting the injection nozzle 123. As a result, the necessary airflow can be formed with less air A, and atomized paint generated during painting can be efficiently exhausted.

[0033] Furthermore, in this embodiment, since the drive mechanism 16, which is located below the work table 15, is covered by the cover table 17, it is possible to suppress the adhesion of atomized paint carried by the airflow to the drive mechanism 16.

[0034] Furthermore, in this embodiment, the cover table 17 is positioned so that its vertical position is the same as or near the position of the work table 15, and it extends horizontally between the outer edge of the work table 15 and the side wall of the painting space 11. This prevents air A from flowing below the work table 15, so that the necessary airflow can be formed with less air A.

[0035] Furthermore, in this embodiment, since the workpiece stand 14 is separated upward from the work table 15, an airflow is formed between the workpiece stand 14 and the work table 15 and cover table 17. This airflow allows for more efficient exhaust of atomized paint floating near the workpiece stand 14.

[0036] Furthermore, in this embodiment, the exhaust port 20 is positioned so that its lower end is below the workpiece stand 14 and above the work table 15, thereby forming an airflow along the work table 15 and the cover table 17. Consequently, it is possible to suppress the adhesion of atomized paint carried by the airflow to the work table 15 and the cover table 17.

[0037] Furthermore, in this embodiment, the painting machine 12 is attached to the mounting part 13 in a suspended state. In other words, the mounting part 13 is located above the workpiece table 14. This allows the necessary airflow to be formed with a small amount of air A.

[0038] Specifically, for example, if the painting machine 12 is placed on the lower wall 11B of the painting space 11, some of the air A flowing near the workpiece table 14 will hit the base 121 or arm 122 of the painting machine 12, causing turbulence in the airflow. In addition, floor space is required to accommodate the base 121 of the painting machine 12, and the volume of the painting booth 10 will also increase. Therefore, more air supply is required to form an airflow.

[0039] In contrast, by positioning the painting machine 12 above the workpiece table 14, it is possible to suppress the disruption of the airflow caused by the air A flowing near the workpiece table 14 hitting the painting machine 12. Furthermore, compared to the case where the painting machine 12 is positioned on the lower wall 11B of the painting space 11, the volume of the painting booth 10 can be reduced. As a result, the necessary airflow can be formed with less air A.

[0040] As illustrated in Figure 1, the paint booth 10 may also be equipped with a rectifier plate 23 within the paint space 11. The rectifier plate 23 is provided between the area where the paint machine 12 is located and the air intake 19. In this example, the rectifier plate 23 extends downward from the upper wall 11A. The rectifier plate 23 directs the airflow downward between the area where the paint machine 12 is located and the air intake 19.

[0041] In other words, the rectifier plate 23 restricts the airflow generated in the painting space 11 by the air supply A from the air intake 19 to flow downwards, thereby suppressing the air A flowing in from the air intake 19 from flowing upwards to the spray nozzle 123. This allows for more efficient exhaust of the atomized paint generated during painting.

[0042] The paint booth 10 may also be equipped with casters 24 to make it movable. The casters 24 are fixed to, for example, the bottom wall of the paint booth 10 so that they can roll on the surface on which the paint booth 10 is installed. The casters 24 may have a locking mechanism to restrict their movement.

[0043] As described above, by efficiently forming an airflow with a small amount of air A inside the painting space 11, the amount of air A supplied to the painting space 11 can be reduced, and the expansion of the size of the painting space 11 can be suppressed. This suppresses the expansion of the size and weight of the painting booth 10 itself, and makes it possible to move the painting booth 10 using the casters 24. The installation location of the painting booth 10 can be easily changed by using the casters 24.

[0044] The configurations described herein are merely examples to facilitate understanding of this disclosure. Each configuration example may be modified and combined with other configuration examples as appropriate, without departing from the spirit of this disclosure.

[0045] In the above embodiment, the painting machine 12, including the spray nozzle 123, is located in a region closer to the rear wall 11D than the air intake 19, regardless of when paint is being sprayed. However, the painting machine 12 only needs to be configured such that the spray nozzle 123 moves to a region closer to the rear wall 11D than the air intake 19 when the spray nozzle 123 is spraying paint.

[0046] In the above embodiment, the painting machine 12, including the spray nozzle 123, is located in a region further away from the air intake 19 than the rectifier plate 23, regardless of when paint is being sprayed. However, the painting machine 12 only needs to be configured such that the spray nozzle 123 moves to a region further away from the air intake 19 than the rectifier plate 23 when the spray nozzle 123 is spraying paint.

[0047] In the above embodiment, the air intake 19 is provided on the upper wall 11A of the painting space 11. However, the air intake 19 may be provided above the area where the spray nozzle 123 is located when the paint is sprayed, and closer to the rear wall.

[0048] For example, as shown in Figure 3, the air intake 19 may be formed above the area where the spray nozzle 123 is located when paint is sprayed on the front wall 11C of the painting space 11. In this configuration as well, the airflow is formed from in front of and above the spray nozzle 123 and toward behind the spray nozzle 123. Therefore, it is possible to suppress turbulence in the airflow caused by the air A supplied into the painting space 11 hitting the spray nozzle 123.

[0049] The configurations listed below also constitute part of this disclosure. Item 1: A paint booth in which paint is sprayed onto an object to be painted by a spray nozzle within a space partitioned by an upper wall, a first side wall, and a second side wall opposite the first side wall, An air inlet is formed in the upper wall for supplying air to the space. An exhaust port for discharging air from the space is formed in the second side wall. A paint booth in which the air intake is located closer to the first side wall than the area in the space where the spray nozzle is positioned when paint is sprayed from the spray nozzle. Item 2: A paint booth in which paint is sprayed onto an object to be painted by a spray nozzle within a space partitioned by an upper wall, a first side wall, and a second side wall opposite the first side wall, A work table for supporting the object to be painted, A cover table that covers a structure located below the work table in the aforementioned space, It is equipped with, An air inlet for supplying air to the space is formed in the space above the area where the spray nozzle is positioned when paint is sprayed from the spray nozzle, and closer to the first side wall than the area. A paint booth in which an exhaust port for discharging air from the space is formed in the second side wall. Item 3: A work table for supporting the object to be painted, A cover table that covers a structure located below the work table in the aforementioned space, A paint booth equipped with the features described in item 1. Item 4: The work table is configured to be rotatable, The paint booth according to item 2 or 3, wherein the work table is circular in shape, and the cover table has a circular opening corresponding to the work table. Item 5: The system includes a platform on which the object to be painted is placed, The painting booth according to any one of items 2 to 4, wherein the workpiece stand is supported by the work table and is separated from the work table above. Item 6: The paint booth as described in item 5, wherein the lower end of the exhaust port is located below the workpiece stand and above the work table. Item 7: A paint booth according to any one of items 1 to 6, comprising a rectifier plate that guides airflow downward between the area where the spray nozzle is positioned and the air intake when paint is sprayed from the spray nozzle. Item 8: A workpiece stand on which the workpiece to be painted is placed, A mounting section for attaching a painting machine having the aforementioned spray nozzle, It is equipped with, The aforementioned mounting portion is located above the workpiece stand, and is part of the paint booth as described in any one of items 1 to 7. Item 9: A paint booth as described in any one of items 1 to 8, comprising casters for making the paint booth movable. [Explanation of Symbols]

[0050] 10: Paint booth, 11: Painting space, 11A: Top wall, 11B: Bottom wall, 11C: Front wall, 11D: Rear wall, 11E: Right wall, 11F: Left wall, 12: Painting machine, 13: Mounting section, 14: Workpiece stand, 15: Work table, 16: Drive mechanism, 17: Cover table, 18: Air supply blower unit, 19: Air intake, 20: Exhaust port, 21: Exhaust chamber, 22: Exhaust blower unit, 23: Rectifier plate, 24: Caster, 121: Base, 122: Arm, 123: Spray nozzle, 141: Shaft section, 151: Shaft section, 171: Opening

Claims

1. A paint booth in which paint is sprayed onto an object to be painted by a spray nozzle within a space partitioned by an upper wall, a first side wall, and a second side wall opposite the first side wall, An air inlet is formed in the upper wall for supplying air to the space. An exhaust port for discharging air from the space is formed in the second side wall. A paint booth in which the air intake is located closer to the first side wall than the area in the space where the spray nozzle is positioned when paint is sprayed from the spray nozzle.

2. A paint booth in which paint is sprayed onto an object to be painted by a spray nozzle within a space partitioned by an upper wall, a first side wall, and a second side wall opposite the first side wall, A work table for supporting the object to be painted, A cover table that covers a structure located below the work table in the aforementioned space, It is equipped with, An air inlet for supplying air to the space is formed in the space above the area where the spray nozzle is positioned when paint is sprayed from the spray nozzle, and closer to the first side wall than the area. A paint booth in which an exhaust port for discharging air from the space is formed in the second side wall.

3. A work table for supporting the object to be painted, A cover table that covers a structure located below the work table in the aforementioned space, A paint booth according to claim 1, comprising the features described above.

4. The work table is configured to be rotatable, The paint booth according to claim 2 or 3, wherein the work table is circular in shape, and the cover table has a circular opening corresponding to the work table.

5. The paint booth according to claim 1 or claim 2, further comprising a rectifier plate that guides the airflow downward between the area where the spray nozzle is positioned and the air intake when paint is sprayed from the spray nozzle.

6. The system includes a platform on which the object to be painted is placed, The painting booth according to claim 2 or 3, wherein the workpiece stand is supported on the work table and is separated upward from the work table.

7. The painting booth according to claim 6, wherein the lower end of the exhaust port is located below the workpiece stand and above the work table.

8. A workpiece stand on which the workpiece to be painted is placed, A mounting section for attaching a painting machine having the aforementioned spray nozzle, It is equipped with, The painting booth according to claim 1 or claim 2, wherein the mounting portion is located above the workpiece stand.

9. The paint booth according to claim 1 or claim 2, further comprising casters for making the paint booth movable.

10. A paint booth in which paint is sprayed onto an object to be painted by a spray nozzle within a space partitioned by an upper wall, a first side wall, and a second side wall opposite the first side wall, An air inlet is formed in the upper wall for supplying air to the space. An exhaust port for discharging air from the space is formed in the second side wall. A paint booth in which the air intake is located closer to the first side wall than the area in the space where the spray nozzle is positioned when paint is sprayed from the spray nozzle.

11. A paint booth in which paint is sprayed onto an object to be painted by a spray nozzle within a space partitioned by an upper wall, a first side wall, and a second side wall opposite the first side wall, A work table for supporting the object to be painted, A cover table that covers a structure located below the work table in the aforementioned space, It is equipped with, An air inlet for supplying air to the space is formed in the space above the area where the spray nozzle is located when paint is sprayed from the spray nozzle, and closer to the first side wall than the area. A paint booth in which an exhaust port for discharging air from the space is formed in the second side wall.

Images