Paint booth equipment

Abstract

The present invention provides a painting booth system that features a simple device configuration while allowing for easy changes in the position of the workpiece inside the booth body. [Solution] The paint booth apparatus 1 of the present invention comprises a booth body 10 having an entrance / exit 11 at one end of a horizontal first direction X, an exhaust device 30 provided at the other end of the booth body 10 in the first direction X for discharging air from inside the booth body 10, and an induced draft fan 50 provided above the entrance / exit 11 on the side of the booth body 10 in the first direction X for blowing air toward the other end of the first direction X and toward downward, wherein the ceiling wall 14 of the booth body 10 is positioned above the induced draft fan 50.

Description

[Technical Field]

[0001] The present invention relates to a coating booth apparatus. [Background Art]

[0002] Conventionally, as a coating booth apparatus for coating a workpiece inside a booth body, there has been known one that forcibly supplies and exhausts air to and from the booth body to remove coating mist and organic solvents contained in exhaust gas (see, for example, Patent Document 1). [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2002-336749 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] Incidentally, in repair coating of construction machinery vehicles, since the repair location is not fixed, it is necessary to change the posture by turning the vehicle inside the booth body or moving a boom up and down; however, with conventional coating booth apparatuses, it is difficult to change the posture of the vehicle. Further, in repair coating of construction machinery vehicles, since the coating area is small compared to the overall size of the workpiece, it is desired that the configuration of the coating booth apparatus is simple.

[0005] The present invention has been made in view of such circumstances, and an object of the present invention is to provide a coating booth apparatus that has a simple apparatus configuration and allows easy changing of the posture of a workpiece inside a booth body. [Means for Solving the Problem]

[0006] The present invention includes the embodiments shown below.

[0007] [1] A painting booth apparatus comprising: a booth body having an entrance / exit at one end in a horizontal first direction; an exhaust device provided at the other end of the booth body in the first direction for discharging air from inside the booth body; and an induced fan provided above the entrance / exit on the side of the booth body at the first end in the first direction for blowing air toward the other end in the first direction and toward downward, wherein the ceiling wall of the booth body is positioned above the induced fan.

[0008] [2] The paint booth apparatus according to [1] above, wherein a plurality of the aforementioned induced fans are provided at intervals along the upper side of the entrance.

[0009] [3] The paint booth apparatus according to [1] or [2] above, further comprising a shutter for opening and closing the entrance and an air intake provided in at least a portion of the area surrounding the entrance and an entrance for introducing outside air into the booth body.

[0010] [4] The painting booth apparatus according to [3] above, further comprising a rectifier member for rectifying the air flowing from the air intake into the booth body.

[0011] [5] A paint booth apparatus according to any one of [1] to [4] above, comprising a nozzle attached to the outlet of the induction fan, wherein the nozzle has a plurality of fins spaced apart in the first direction, which are inclined to become lower towards the other end in the first direction, and the fins located towards the other end in the first direction are inclined to have a larger acute angle of inclination with respect to the vertical direction.

[0012] [6] A paint booth apparatus according to any one of [1] to [5] above, wherein the angle of inclination on the acute side of the airflow direction of the air blown out from the outlet in the vertical direction is 20 degrees or more and 30 degrees or less. [Effects of the Invention]

[0013] According to the above embodiment, a painting booth device that allows for easy changes in the position of the workpiece inside the booth body can be obtained with a simple configuration. [Brief explanation of the drawing]

[0014] [Figure 1] Cross-sectional view of a paint booth system [Figure 2] Cross-sectional view AA in Figure 1 [Figure 3] BB cross-section diagram in Figure 1 [Figure 4] Side view of an induced draft fan with a nozzle attached. [Figure 5] A view of the front wall of a paint booth device in a modified example of the present invention, as seen from the painting space. [Figure 6] Cross-sectional view of a paint booth device in a modified example of the present invention. [Modes for carrying out the invention]

[0015] The overall configuration of the paint booth apparatus 1 of this embodiment will now be described.

[0016] (1) Overview of Paint Booth System 1 As shown in Figures 1 to 3, the paint booth device 1 comprises a booth body 10, an exhaust device 30, and an induced draft fan 50. The paint booth device 1 has a painting space S formed inside the booth body 10 for painting workpieces W such as construction machinery vehicles. After removing airborne paint and other materials from the painting space S using the exhaust device 30, the paint is exhausted to the outside of the booth body 10.

[0017] (2) Booth body 10 The booth body 10 comprises a front wall 12 with an entrance / exit 11 for loading and unloading workpieces W at one end in a horizontal first direction X, a rear wall 13 facing the front wall 12 in the first direction X, a ceiling wall 14 connecting the upper ends of the front wall 12 and the rear wall 13, a lower wall 15 connecting the lower ends of the front wall 12 and the rear wall 13, and side walls 16, 16 connecting the side ends of the front wall 12 and the rear wall 13. Inside the booth body 10, enclosed by the front wall 12, the rear wall 13, the ceiling wall 14, the lower wall 15, and the side walls 16, 16, a painting space S is formed where workers paint workpieces W such as construction machinery vehicles. In addition, the front wall 12 of the booth body 10 is provided with a shutter 17 for opening and closing the entrance / exit 11.

[0018] In this specification, the first direction X corresponds to the front-rear direction when viewing the entrance / exit 11 from the front, and the second direction Y refers to the horizontal left-right direction perpendicular to both the first direction X and the vertical direction Z.

[0019] At the central portion in the second direction Y of the lower part of the front wall 12, there are provided the entrance / exit 11 and a shutter 17 that opens and closes the entrance / exit 11. The height of the booth body 10, that is, the height of the front wall 12, the rear wall 13, and the side walls 16, 16, is greater than the height of the entrance / exit 11, and is preferably set to 1.5 times or more the height of the entrance / exit 11, more preferably 1.8 times or more.

[0020] The rear wall 13 is provided with a mounting opening 18 for mounting an exhaust device 30 at a position facing the entrance / exit 11 provided on the front wall 12 in the first direction X. The mounting opening 18 is provided inside a projection surface obtained by projecting the entrance / exit 11 onto the rear wall 13 in the first direction X.

[0021] (3) Exhaust device 30 The exhaust device 30 includes an exhaust chamber 31, an exhaust fan 32, and an exhaust stack 33. The exhaust chamber 31 is provided in the mounting opening 18 of the rear wall 13 such that a suction port 31a faces a coating space S. A ventilation filter 34 that allows gas to flow from the coating space S into the exhaust chamber 31 is provided at the suction port 31a. The ventilation filter 34 is a filter that adsorbs and removes paint and the like floating in the coating space S, and is provided so as to face the entrance / exit 11 of the front wall 12 in the first direction X with the coating space S interposed therebetween.

[0022] The exhaust fan 32 sucks air from the exhaust chamber 31 and discharges it to the outside through the exhaust stack 33, whereby air in the coating space S flows into the exhaust chamber 31 through the ventilation filter 34 and is discharged to the outside through the exhaust stack 33.

[0023] As the ventilation filter 34 provided at the suction port 31a, a filter with the same opening ratio may be provided over the entire suction port 31a, or the opening ratio of the ventilation filter 34 may be varied depending on the position of the suction port 31a.

[0024] For example, as shown in Figure 3, the ventilation filter 34 is divided into four sections in the vertical direction Z, with the first ventilation filter 34a at the top, the second ventilation filter 34b at the second section from the top, the third ventilation filter 34c on both sides of the second direction Y at the third and fourth sections from the top, and the fourth ventilation filter 34d in the center of the second direction Y at the third and fourth sections from the top.

[0025] Among the first to fourth ventilation filters 34a to 34d, the third ventilation filter 34c has the largest opening ratio, followed by the second ventilation filter 34b, while the first ventilation filter 34a and the fourth ventilation filter 34d have the smallest opening ratios. As a result, the average opening ratio in the second direction Y decreases stepwise as you move upwards through the ventilation filters 34.

[0026] (4) Inducement fan 50 The induced air fan 50 is an axial-flow fan and is installed above the entrance / exit 11 on one end of the first direction X of the booth body 10 (i.e., the front wall 12 side), and blows air downwards towards the other end of the first direction X (i.e., the rear wall 13 side).

[0027] As shown in Figures 1 and 2, the front wall 12 of the booth body 10 is provided with a mounting beam 19 that extends in a second direction Y along the upper edge of the entrance 11, above the entrance 11. Multiple induced draft fans 50 are provided on the mounting beam 19 at intervals in the second direction Y.

[0028] In this embodiment, induction fans 50 are provided at the central position in the second direction Y of the entrance / exit 11 and at positions separated by a predetermined distance (for example, 50 to 100 cm) from this central position in the second direction Y. As shown in Figure 2, it is preferable that the positions projected onto the front wall 12 of the multiple induction fans 50 are positioned inward from the entrance / exit 11 in the second direction Y. It is also preferable that the positions projected onto the rear wall 13 of the induction fans 50 are positioned inward from the mounting opening 18 in the second direction Y.

[0029] The induced draft fan 50 is attached to the mounting beam 19 via a bracket 51. The bracket 51 allows the orientation of the induced draft fan 50 to be changed, thereby adjusting the airflow direction of the wind blown out from the outlet 50a (i.e., the rotation axis direction of the induced draft fan 50). Preferably, the airflow direction of the wind blown out from the outlet 50a has an acute angle of 20 degrees or more and 30 degrees or less with respect to the vertical direction Z.

[0030] A nozzle 52 is attached to the outlet 50a of the induced draft fan 50. The nozzle 52 disperses the air blown out from the outlet 50a in a predetermined direction and supplies it to the painting space S. Specifically, as shown in Figure 4, the nozzle 52 is provided with a plurality of fins 53 spaced apart in the first direction X, which are inclined to become lower as they approach the other end (rear wall 13 side) in the first direction X. The plurality of fins 53 are arranged such that the inclination angle θ on the acute side with respect to the vertical direction Z is larger for the fins 53 located on the rear wall 13 side.

[0031] (5) Effects In the paint booth device 1 with the above configuration, after opening the shutter 17 to open the entrance / exit 11 and placing the workpiece W into the painting space S, the exhaust fan 32 of the exhaust device 30 is operated to draw in air from the painting space S while the entrance / exit 11 remains open, and the induced draft fan 50 is operated to blow air diagonally downward from above the entrance / exit 11 toward the rear wall 13. When operating the exhaust device 30 to draw in air from the painting space S, it is preferable to open the shutter 17 so that the entrance / exit 11 opens to the same height as, or more than, the projection plane obtained by projecting the intake port 31a of the exhaust device 30 onto the front wall 12.

[0032] In the painting space S, outside air from the booth body 10 flows in through the entrance / exit 11 of the front wall 12, generating a horizontal airflow in a first direction X toward the intake port 31a of the exhaust device 30 located on the rear wall 13. As a result, a capture area S1 is formed in the painting space S below the upper end of the ventilation filter 34 of the exhaust device 30, which captures harmful substances such as paint mist and organic solvents and discharges them to the outside via the exhaust device 30.

[0033] Furthermore, since the induction fan 50 blows air diagonally downward from above the inlet / outlet 11 toward the rear wall 13, it is possible to prevent the air in the capture area S1 from diffusing to a higher position in the painting space S. At the same time, turbulence is less likely to occur between the horizontal airflow taken into the booth body 10 from the inlet / outlet 11 of the front wall 12 and the airflow from the induction fan 50, and a uniform flow can be generated in the capture area S1.

[0034] As in the painting booth device 1 of this embodiment, by providing multiple induced draft fans 50 at intervals in the second direction Y, it is possible to prevent the air near the workpiece W from diffusing outwards in the second direction Y.

[0035] In the paint booth apparatus 1 of this embodiment, by providing the nozzle 52 described above at the outlet 50a of the induced draft fan 50, the air blown out from the induced draft fan 50 is dispersed in the first direction X and supplied to the capture area S1 of the paint space S. This makes it possible to achieve a high degree of both upward diffusion of the air in the capture area S1 and suppression of turbulence.

[0036] (6) Example of changes Although embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. Components with the same configuration as those in the above-described embodiments are denoted by the same reference numerals, and detailed descriptions are omitted.

[0037] In this modified example of the paint booth device 100, the air intake port 101 for introducing outside air (outside air) into the booth body 10 may be provided in a part of the area around the entrance / exit 11 on the front wall 12, or it may be provided around the entire area around the entrance / exit 11.

[0038] In this modified example, as shown in Figures 5 and 6, air inlets 101 are provided on the upper side of the entrance / exit 11 and on both sides in the second direction Y, so that the air inlets 101 surround the entrance / exit 11 on three sides. Louvers 102 may be provided in the air inlets 101 to prevent rainwater and the like from entering from the outside. In addition, a flow straightening material 103 made of a material that causes pressure loss when passing through, such as a nonwoven fabric, may be provided in the air inlets 101.

[0039] In this modified example, since an air intake 101 is provided around the entrance / exit 11, if there is a risk of turbulence, strong winds, or foreign matter such as rainwater entering the painting space S from the entrance / exit 11, part or all of the entrance / exit 11 can be closed with the shutter 17, preventing foreign matter from entering the painting space S, and the workpiece W can then be painted. [Explanation of symbols]

[0040] 1...Painting booth equipment, 10...Booth body, 11...Entrance / exit, 12...Front wall, 13...Rear wall, 14...Ceiling wall, 15...Bottom wall, 16...Side wall, 17...Shutter, 18...Mounting opening, 19...Mounting beam, 30...Exhaust device, 32...Exhaust fan, 50...Induced draft fan, 50a...Air outlet, 51...Bracket, 52...Nozzle, 53...Fin, 100...Painting booth equipment, 101...Air intake, 102...Louver, 103...Flow straightening material, S...Painting space, S1...Capture area, W...Workpiece, X...First direction, Y...Second direction, Z...Up / down direction, θ...Incline angle

Claims

1. A booth body with an entrance / exit at one end in the horizontal first direction, An exhaust device is provided at the other end of the booth body in the first direction for discharging air from inside the booth body, The booth body is provided with an induced fan located above the entrance at one end in the first direction, which blows air diagonally downward towards the other end in the first direction, In the aforementioned booth body, the ceiling wall that partitions the upper surface of the space for housing the workpiece is positioned above the induced fan at a distance from it. A painting booth apparatus in which air from outside the booth body flows into the inside of the booth body through the entrance and exit, passes through a space for housing workpieces, and is discharged to the outside from the exhaust device.

2. The paint booth apparatus according to claim 1, wherein a plurality of the aforementioned induction fans are provided at intervals along the upper side of the entrance / exit.

3. The painting booth apparatus according to claim 1, comprising a shutter for opening and closing the entrance, and an air intake port provided in at least a part of the area surrounding the entrance for introducing outside air into the booth body.

4. The painting booth apparatus according to claim 3, further comprising a rectifying member for rectifying the air flowing from the air intake into the booth body.

5. The aforementioned induced draft fan is equipped with a nozzle attached to its outlet, The paint booth apparatus according to claim 1, wherein the nozzle has a plurality of fins spaced apart in the first direction, which are inclined to become lower towards the other end in the first direction, and the fins located towards the other end in the first direction are inclined to have a larger acute angle of inclination with respect to the vertical direction.

6. The paint booth apparatus according to claim 1, wherein the inclination angle on the acute side of the airflow direction of the wind blown out from the outlet in the vertical direction is 20 degrees or more and 30 degrees or less.

Images