JP2004167366A - Air feed port adjustment structure for coating booth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air feed port adjustment structure for a coating booth capable of adjusting width of an air feed surface without disturbing distribution of air stream speed within a predetermined range in order to save air-blasting energy supposing that a ratio of the width of the air feed surface to an air discharge surface is restricted by reduction of concentration of an organic solvent. <P>SOLUTION: In the coating booth 1, coating is carried out in the state that air is blasted from the air feed port 8 of air at a ceiling side toward a slatted drain-board floor 3 becoming the air discharge surface. Air stream shield bodies 10 by flat surface-like plates 11, 12 are obliquely disposed respectively so as to constituted booth corner parts at both sides of the air feed port 8. An upper end and a lower end are supported to the ceiling side and the booth wall side so as to be capable of adjusting a position in a side direction and a vertical direction. The width between the upper end and the lower end becoming a side end of the air feed port 8 can be adjusted by superposing of the plates 11, 12. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a coating booth for performing coating while air is blown from a ceiling air supply port to a floor serving as an exhaust surface.
[0002]
[Prior art]
According to Literature 1 or Literature 2, in order to secure the coating quality, a filter or a rectifying plate is arranged on the ceiling of the coating booth over a width corresponding to the exhaust surface to make the downward airflow velocity uniform throughout the booth. A painting booth has been proposed. Further, according to Document 3, a coating booth having a wind direction changing portion provided on a ceiling filter so as to make the peripheral flow velocity larger than the flow velocity toward the object to be coated is also proposed in order to ensure coating quality. ing.
[0003]
[Patent Document 1]
JP 07-144162 A [Patent Document 2]
JP 07-178360 A [Patent Document 3]
JP-A-2002-159897
[Problems to be solved by the invention]
Each of these coating booths is based on the premise that a desired flow velocity distribution is formed inside the coating booth. When the external structure of the coating object and the coating equipment is changed, the desired flow velocity distribution range actually required They are not aware of the corresponding changes.
[0005]
In view of such a point, the present invention requires the ratio of the width of the air supply surface to the exhaust surface to be constrained in reducing the concentration of the organic solvent, in order to save blowing energy, It is an object of the present invention to provide an air supply port adjusting structure for a coating booth that can adjust the size of an air supply surface without disturbing the distribution of airflow velocity within the range.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the present invention provides a coating booth in which coating is performed in a state where air is blown from an air inlet on the ceiling side to a floor serving as an exhaust surface according to claim 1. On both sides, flat plane airflow shields are arranged diagonally so as to form a booth corner, and the upper end and the lower end of the shield are laterally located on the ceiling side and the booth wall side, respectively. In addition, it is supported so that the position can be adjusted in the vertical direction, and the width between the upper end and the lower end, which are the side ends of the air supply port, can be adjusted.
[0007]
The upper end of the shield is laterally adjusted so that a desired flow velocity distribution is obtained within a range corresponding to the external structure of the object to be coated or the coating apparatus, and the air supply surface is made as small as possible. The width of the mouth is set. At this time, the width between the upper end and the lower end of the shield is adjusted at the same time. Further, in order to finely adjust the flow velocity distribution or avoid interference with the coating apparatus, the lower end of the shield is adjusted as necessary to change the inclination angle.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
An air supply port adjusting structure of a coating booth according to an embodiment of the present invention will be described with reference to FIGS. The painting booth 1 is used for vehicle painting. The entrance and exit of a vehicle 9 to be painted conveyed on the conveyance path 2 are provided on front and rear walls of the painting booth, and air is blown from an air supply port 8 on the ceiling side. Then, the air is exhausted from a child bed 3 serving as an exhaust surface and an exhaust duct 4 spaced downward. On both sides in the lateral direction across the transport path 2, a painting robot 5 for painting the upper area and the upper side area of the vehicle and a painting apparatus 6 for painting the lower area on the side surface are arranged.
On both sides of the air supply port 8, flat plane-shaped airflow shields 10 are respectively arranged obliquely to form a booth corner portion. This airflow shield is composed of two plates 11 and 12 that enable the width between the upper end and the lower end, that is, the width in the oblique direction to be adjustable according to the amount of overlap with each other. Has hinges 13 and 23 attached thereto. A long groove-shaped bolt insertion groove 14 is formed in the plate 11, and a bolt 15 is inserted from the plate 12.
[0010]
Frames 19 are provided on both sides of the painting booth 1, and a long frame-shaped bolt insertion groove 19 c extending laterally is provided in a horizontal frame portion 19 b disposed on the ceiling side of the painting booth 1 at an interval for air blowing in the front-rear direction. Is formed. A long groove-shaped bolt insertion groove 19d extending in the vertical direction is formed in the vertical frame portion 19a. The bolts 16 are inserted through these bolt insertion grooves 19c and 19d, and the hinges 13 and 23 are fixed to the frame portions 19a and 19b with nuts 16a.
[0011]
Thus, the airflow shield 10 occupies a position above the coating robot 5 and the coating device 6. On the other hand, the width of the booth 1 in the front-rear direction is set to a width corresponding to a large vehicle with a margin since the front-rear width of the vehicle varies more than the lateral width depending on the vehicle type. It has not been.
[0012]
In the air supply port adjusting structure of the coating booth thus configured, in the state shown in FIG. 1, the width of the air supply port 8 serving as the air supply surface is, for example, 4 m, and the airflow shields 10 on both sides thereof are viewed in plan. Each of the widths is 1 m, and is set to the minimum limit of a ratio value 2/3 or more which is a regulation condition of the organic solvent with respect to the exhaust surface, that is, the width 6 m of the child bed 3. In addition, the inclination angle θ of the airflow shield 10 is set to 30 °. By the way, when this angle is reduced, turbulence is likely to be generated in the corner portion due to rapid diffusion, and similarly, the flow velocity distribution surrounding the vehicle 9 tends to be disturbed. Increasing this angle is limited in terms of interference with the painting robot 5.
[0013]
In a state where the vehicle 9 is carried in and painted by the coating devices 5 and 6, the air pressure-fed from the ventilation duct on the ceiling side is blown downward from the air inlet 8 and passed through the air inlet 8. Immediately thereafter, the airflow also diffuses laterally, and at this time, the airflow is gently deflected by the plates 11 and 12 so that an airflow having a predetermined downward flow velocity is generated along the inside of the coating robot 5. In this way, the air supply surface is set to the minimum width that can secure the desired flow velocity distribution within the limit of organic solvent prevention, so that the blowing energy is set to be approximately the same as the exhaust surface. It has been confirmed that the volume of the coating booth 1 is reduced by about several tens of percent.
[0014]
If there is a possibility that the airflow distribution around the vehicle fluctuates due to the increase in the external structure due to the replacement of the painting robot 5, etc., input the external structure of the painting robot, the operating range of its arm, the external structure of the vehicle, etc. As a condition, the width of the air supply port 8 and the inclination angle θ of the airflow shield 10 are analyzed by simulation software for airflow distribution so as to secure a desired downward flow velocity distribution in a necessary range surrounding the vehicle 9.
[0015]
According to the analysis result, the nut 16a of the hinge 13 on the upper end side is loosened, the bolt 16 is moved laterally outward along the bolt insertion groove 19c and tightened, and the width of the overlapping plates 11 and 12 is also reduced by the nut 15a. And move the bolt 15 along the bolt insertion groove 14 to tighten it. If the inclination angle θ is also to be adjusted, the vertical position of the hinge 23 is similarly adjusted by fixing the bolt 15 along the bolt insertion groove 19d and fixed. At the side end portion of the air supply port 8, air is blown from a gap between the frame portions 19b.
[0016]
The adjusted airflow distribution can be confirmed by a test. In addition, without depending on the analysis by the simulation software, the width of the air supply port 8 is set to be a minimum in an allowable range, and the inclination angle θ is set as necessary, so that a desired downward flow velocity distribution in the necessary range is obtained. It can also be adjusted while confirming by a test so that it is secured.
[0017]
As another embodiment, the airflow shielding body is constituted by a sheet winder, and the winder and the leading end of the drawn sheet are laterally and vertically moved to either the ceiling side or the booth wall side. It can also be supported so that the position can be adjusted. For example, the winder may be mounted so that the slide position can be adjusted, and the leading end of the sheet is selectively locked to a plurality of hooks. Further, the drawn-out sheet is configured to be able to maintain a tensioned state. The width between the upper and lower ends of the airflow shield is adjusted by the winding amount.
[0018]
【The invention's effect】
According to the first aspect of the present invention, the airflow velocity distribution is ensured within a necessary range according to the fluctuation of the external structure of the device installed in the booth or the object to be coated, and the air supply surface is within the limit of preventing organic solvents. By adjusting to the minimum, it is possible to stabilize the coating quality and to save energy of the blower.
[0019]
According to the invention of claim 2, in the coating booth in which the coating devices are disposed on both sides with respect to the transport direction of the object to be coated, the airflow shield is disposed in the booth corners on both sides, so that the outside of the coating device is provided. In accordance with the change in the structure, a desired airflow velocity distribution is secured and energy saving is appropriately set. According to the third or fourth aspect of the present invention, the airflow shield is realized with a simple configuration using two plates or a winder.
[Brief description of the drawings]
FIG. 1 is a partially sectional front view of a supply booth adjusting structure of a coating booth according to an embodiment of the present invention.
FIG. 2 is a side view of an airflow shield having the air supply port adjusting structure.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 painting booth 3 curtain 5 painting robot 6 painting device 8 air supply port 9 vehicle 10 airflow shield 11,12 plate 13,23 hinge 14,19c, 19d bolt insertion groove 15,16 bolt

Claims (4)

In a painting booth where painting is performed in a state where air is blown from the air inlet on the ceiling side to the floor that will be the exhaust surface,
On both sides of the air supply port, flat plane-shaped airflow shields are respectively arranged diagonally so as to constitute a booth corner portion,
The upper end and the lower end of the shield are supported on the ceiling side and the booth wall side so as to be position-adjustable in the lateral and vertical directions, respectively, and the upper end serving as the side end of the air supply port is provided. And a width between the lower end and the lower end is adjustable. On the front and rear walls of the painting booth, entrances and exits for the painting object being conveyed are provided, and below the airflow shields arranged on both sides in the conveyance direction, painting devices are arranged with the painting object interposed therebetween. The air supply port adjusting structure for a coating booth according to claim 1, wherein The airflow shield is composed of two plates that allow the width between the upper end and the lower end to be adjustable according to the amount of overlap with each other, and the upper end is erected at a distance from the ceiling. Wherein the lower end is supported by a hinge provided so as to be position-adjustable along a booth wall. Item 3. An air supply port adjusting structure for a coating booth according to claim 1 or 2. 3. The airflow adjusting structure for a coating booth according to claim 1, wherein the airflow shield is constituted by a sheet drawn from the winder.

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