JPH0531419A - Water curtain device of painting equipment - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a water curtain device for a coating facility, and provides a water curtain device capable of preventing defective painting of a work due to adhesion of paint mist to a water curtain guide plate. The purpose is to do. According to the present invention, a slit-shaped opening having a constant width extending over the entire length of the water storage tank is provided at a position lower than the water level in the water storage tank, and water in the water storage tank is watered through the slit-shaped opening. The above-mentioned object is achieved by supplying the curtain guide plate to the surface thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water curtain device for a painting facility, and more particularly to a water curtain device configured to form a water film flow on the surface of a water curtain guide plate by water supplied from a water tank.

[0002]

2. Description of the Related Art In a coating facility, particularly a spray coating booth, there is a water curtain device as one means for capturing paint mist floating in the booth. Figure 2
In the water curtain device A in this type of conventional coating equipment shown in FIG.
A water tank C extending horizontally over the entire length of the booth B is installed at the upper part of the booth B, and a water curtain guide plate D extending vertically along the entire length of the water tank C is provided on the inner surface of the side wall Ba. Is provided. Water H is supplied to the water storage tank C from a water source (not shown) through a water supply pipe G provided with a pump E and a water amount adjusting valve F, and the water is turbulently rectified by a baffle plate I and then The water curtain guide plate D gets over the upper edge portion Da and flows down as a water film flow J on the surface of the guide plate D.
On the other hand, the work transfer device K is installed on the upper wall Bb of the coating booth B, and the paint is sprayed from the spray gun M of the automatic coating machine L toward the work W mounted on the work transfer device K. Here, the paint mist N that has not adhered to the work W is trapped by the water film flow J flowing on the surface of the water curtain guide plate D and discharged. The paint mist N is captured by being mixed with the circulating water O, and further captured by the eliminator Q provided in the exhaust passage P, so that the leakage from the coating booth B is prevented.

[0003]

By the way, in the above-mentioned conventional water curtain device A, as described above, the water which has overflowed over the upper edge portion Da of the guide plate D and overflowed is guided.
When the upper edge Da of the guide plate D is slightly deformed in the longitudinal direction, the water film flow having a uniform thickness is provided over the entire length of the water curtain guide plate D. In addition, a large number of valves F for adjusting the amount of water supplied to the water storage tank C are arranged in parallel along the longitudinal direction of the water storage tank C, and complicated adjustment work is performed on each valve F. However, it is still difficult to obtain a uniform and stable water film flow. If the stability of the water film flow on the surface of the water curtain guide plate D is poor and a thin portion is formed in the water film flow, the paint mist will adhere to the surface of the guide plate D there, and this paint mist will serve as the nucleus one after another. Paint mist adheres and grows into a mass. Due to the solidification of the paint mist, the water in the water film stream flowing on the surface of the guide plate D is scattered to stain the work W, which causes a problem that a lot of coating defects of the work occur. In view of the above situation, the present invention provides a water curtain device of a coating facility capable of preventing the occurrence of coating failure on a work due to the adhesion of the paint mist to the water curtain guide plate. To aim.

[0004]

Therefore, in the water curtain device of the coating facility according to the present invention, a portion of the water tank lower than the water level in the water tank has a constant width extending over the entire length of the water tank. The above object is achieved by providing a slit-shaped opening and supplying the water in the water storage tank to the surface of the water curtain guide plate through the slit-shaped opening.

[0005]

According to the above construction, the water in the water tank passes through the slit-shaped opening, so that the water from the water tank is uniformly and stably supplied over the entire surface of the water curtain guide plate. It will be.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing an embodiment. In the water curtain device 1 of the coating facility according to the present invention shown in FIG. 1, the outer side of the upper side of one side wall 2a of the coating booth 2 extends over the entire length of the booth 2 in the longitudinal direction (direction perpendicular to the paper surface). A water tank body 3 extending in the horizontal direction is installed. A water curtain guide plate 4 is provided on the inner side of the side wall 2a and extends in the vertical direction over the entire length of the water tank body 3. Further, in the region directly above the side wall 2a,
A partition plate 5 is installed, and the water tank 1 for substantially storing water by the water tank main body 3 and the partition plate 5.
0 is configured.

In the water storage tank 10, the water storage tank 10 is provided at a position lower than the water level of the water 100 stored in the water storage tank 10.
Is provided with a slit-shaped opening 10A extending in the horizontal direction over the entire length of the same and having a constant width in the height direction. As is clear from the drawing, the slit-shaped opening 10A is provided in the water curtain guide plate 4. The upper edge portion 4a and the lower edge portion 5a of the partition plate 5 are formed.

The partition plate 5 is the upper wall 2b of the coating booth 2.
Is supported in a vertically moving manner by a guide bracket 6 provided on the partition wall 5, and a ball screw 7 is connected to the partition plate 5. The ball screw 7 is screwed with a screw block 8 supported on the upper wall 2b. ing. The partition plate 5, the guide bracket 6, the ball screw 7, and the screw block 8 are used to separate the partition plate 5 from each other.
The slit-shaped opening 10A by moving up and down
A water amount adjusting means 20 for adjusting the opening area of the water, that is, the amount of water supplied from the water tank 10 to the water curtain guide plate 4 is configured.

On the other hand, the water tank body 3 has a bottom deep portion 3A adjacent to the side wall 2a and a bottom shallow portion 3B continuous with the bottom deep portion 3A.
The first baffle plate 3a is erected at the boundary between the deep bottom 3A and the shallow bottom 3B, and the deep bottom 3A is supported by the upper wall 2b of the coating booth 2. The second baffle plate 3C is inserted from above. Further, an opening 3c is formed in the bottom plate 3b in the bottom deep portion 3A, and this opening 3c is normally closed by a lid plate 3D screwed to the bottom plate 3b.

A water supply pipe 31 for supplying water 100 to the water storage tank 10 from a water source (not shown) via a pump 30 is provided above the shallow bottom portion 3B of the water storage tank main body 3 above. Along the extension direction of the water tank body 3
A large number of water supply adjusting valves 32 are provided in parallel in each of the water supply pipes 31.

The water storage tank 1 is provided through the water supply pipes 31.
The water 100 supplied to 0 first flows into the shallow bottom portion 3B of the water tank body 3 as indicated by the arrow a, and then rotates around the first baffle plate 3a and the second baffle plate 3C as indicated by the arrows b and c. After flowing in the flow, it passes through the slit-shaped opening 10A and flows out to the surface of the water curtain guide plate 4, and becomes a water film flow 100A and flows down the guide plate 4.

At this time, the water from the water storage tank 10 is uniformly and stably supplied to the entire surface of the water curtain guide plate 4 by passing through the slit-shaped opening 10A. As a result, a uniform and stable water film flow 1 is formed on the surface of the water curtain guide plate 4.
00A is formed, so that the paint mist in the paint booth 2 does not adhere to the water curtain guide plate 4 and is reliably captured by the water film flow 100A.

On the other hand, the water curtain guide plate 4
As for the amount of water supplied to the above, the partition plate 5 in the above-mentioned water amount adjusting means 20 is moved up and down to change the width of the slit-shaped opening 10A in the height direction, in other words, the opening area of the slit-shaped opening 10A. Can be easily adjusted by. For this reason, it is not necessary to adjust the amount of water supplied to the water tank for the purpose of adjusting the amount of water flowing out from the water tank to the guide plate. Therefore, a water amount adjustment valve for adjusting the amount of water to the water tank described above. It is not necessary to provide a large number of 32, and complicated valve adjustment work is unnecessary.

The water 10 supplied to the water storage tank 10
0 is effectively rectified by flowing around the first baffle plate 3a and the second baffle plate 3C, as indicated by arrows b and c in the figure, and further, the second baffle plate 3C is removed at the bottom deep portion 3A. Since the sludge 150 contained in the water is precipitated and separated when it goes around, stabilization and cleaning of the water supplied from the water storage tank 10 to the water curtain guide plate 4 are achieved. The sludge 150 deposited in the bottom deep portion 3A can be easily discharged and discarded through the opening 3c of the bottom plate 3b by removing the cover plate 3D.

[0015]

As described above in detail, in the water curtain device according to the present invention, the slit-shaped opening portion having a constant width extending over the entire length of the water storage tank is provided at a position lower than the water level in the water storage tank. Since the water in the water tank is supplied to the surface of the water curtain guide plate through this slit-shaped opening, it is possible to obtain a uniform and stable water film flow over the entire area of the water curtain guide plate. it can. For this reason, it is possible to prevent the paint mist from adhering to the water curtain guide plate, and thus to prevent the coating failure of the work due to the adherence of the paint mist to the guide plate as much as possible.

[Brief description of drawings]

FIG. 1 is a sectional side view conceptually showing a water curtain device of a painting facility according to the present invention.

FIG. 2 is a conceptual cross-sectional view of a main part of a coating facility including a conventional water curtain device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Water curtain device, 2 ... Painting booth, 3 ... Water tank main body, 4 ... Water curtain guide plate, 5 ... Partition plate, 10 ... Water tank, 10A ... Slit-like opening part, 20 ... Water amount adjusting means, 100A ... Water Membrane flow.

Claims (1)

Claim: What is claimed is: 1. A water tank extending horizontally in a coating booth, and a water curtain provided below the water tank and extending vertically along the entire length of the water tank. A water curtain device of a coating facility, which comprises a guide plate, forms water film flow by supplying water from the water tank to the surface of the water curtain guide plate, and captures paint mist by the water film flow. Then, as a passage for supplying the water of the water storage tank to the surface of the water curtain guide plate at a site lower than the water level in the water storage tank, a slit-shaped opening having a constant width extending over the entire length of the water storage tank. A water curtain device for coating equipment, which is characterized by having a section.