JP4629359B2 - Spray painting booth equipment - Google Patents

Description

  The present invention relates to a spray painting booth apparatus, and more particularly, to an eddy current type spray painting booth apparatus in which unnecessary spray paint that is diffused into the air at the time of spray painting is sucked together with outside air and is collected by collecting water droplets. .

A conventional example is shown in FIG. 15 (Non-Patent Document 1).
The conventional example shown in FIG. 15 is a vortex type painting booth, and reference numeral 100 denotes a box-shaped booth body. This booth main body 100 is equipped with means for collecting spray paint (mist-like paint mist) that passes around the object to be painted and is released into the air during spray painting. Further, the box-shaped booth main body 100 is equipped with an intake / exhaust mechanism 101 for sucking the gas in the booth main body 100 from below and discharging it to the outside at the upper end, and a water tank 102 at the lower end.

The booth main body 100 is provided with an outside air inlet 103 for simultaneously sucking the water in the water tank 102 and the spray paint at the lower part of the front plate 100A located facing the object to be coated.
The outside air inlet 103 has a water droplet forming member 104 having a laminated structure such as a wire mesh that allows the outside air and water to flow easily so as to close the outside air inlet 103 and the bottom of the water tank 102 described above. It is arranged.

For this reason, the water sucked into the booth main body 100 while passing through here is partly pulverized into particles by the water droplet forming member 104, and a form in which air including spray paint and water are mixed. Inhaled.
Further, water and spray paint that are forcibly sucked through the outside air inlet 103 and partially formed into water droplets are guided upward by the concave guide plate 105.

A partition plate 106 protrudes substantially horizontally from the front plate 100 </ b> A located above the outside air inlet 103 in a direction covering the above-described concave guide plate 105. As a result, a part of the water droplets and spray paint guided by the concave guide plate 105 is blocked by the partition plate 106 and directed downward, and this is continuously performed. A swirl of air is generated in a space (vortex chamber 107) surrounded by the guide plate 105, and in this, adhesion of the spray paint to the water droplets is promoted.
That is, the spiral chamber 107 is constituted by the side wall plates 100B and 100C of the booth main body 100, the water droplet forming member 104, the concave guide plate 105, and the partition plate 106.

Between the upper edge of the front end portion and the concave guide plate 105 of the partition plate 106 in FIG. 15, upper opening 107A for delivering the water microdroplets upward is set. For this reason, the fine water droplets sucked by the intake / exhaust mechanism 101 mounted on the upper side and attached with the spray paint in the spiral chamber 107 are continuously sent out from the upper opening 107A.

Further, a paint mist collecting mechanism 108 as a means for collecting the sprayed paint together with water droplets is provided above the partition plate 106. The paint mist collecting mechanism 108 is composed of three horizontal partition plates 111, 112, and 113 arranged obliquely and horizontally at a predetermined interval.
Among these, the 1st horizontal partition plate 111 protrudes in the booth main body 100 from the front plate 100A side toward the upper opening 107A of the spiral chamber 107 described above, and the front end thereof faces the upper opening 107A. It is arranged in the state.

Above the first horizontal partition plate 111, a second horizontal partition plate 112 is provided with a predetermined distance from the first horizontal partition plate 111. The second horizontal partition plate 112 protrudes obliquely upward from the rear plate 100D side of the booth main body 100 toward the front plate 100A described above so as to cover the front end portion of the first horizontal partition plate 111 described above. ing.
Further, a third horizontal partition plate 113 is provided above the second horizontal partition plate 112 with a predetermined distance from the second horizontal partition plate 112. The third horizontal partition plate 113 protrudes obliquely upward from the front plate 100A side of the booth main body 100 toward the rear plate 100B described above so as to cover the tip of the second horizontal partition plate 112 described above. ing.

  Between the first to third horizontal partition plates 111 to 113, as described above, an air passage is provided between the front end portion and the rear plate or the front plate, respectively. The intake / exhaust mechanism 101 has a configuration in which fine water droplets are easily sucked upward from the upper opening 107 </ b> A together with other air sucked simultaneously from the inside of the spiral chamber 107.

  And the fine water droplets to which the spray paint (paint mist) delivered from the upper opening 107A in the swirl chamber 107 is attached, due to its inertia, most of the horizontal partition plates 111 to 113 positioned facing each other in the traveling direction. Or the rear plate 100D or the front plate 100A sequentially collides with and adheres with the spray paint, and since it is made continuously, the attached fine water droplets grow into large water droplets, and eventually the spray paint in the lower water tank Dripping together.

That is, the paint mist collecting mechanism 108 continuously receives fine water droplets to which the spray paint adheres and grows them into large water drops, whereby the spray paint can be effectively collected in the lower water tank.
After the spray paint is effectively removed by water droplets, the air that has been transported is sucked into the intake / exhaust mechanism 101 and discharged to the outside. During this time, some of the water droplets are discharged to the outside together with the air, so that the water in the water tank gradually decreases. In such a case, the water is replenished from the outside by a water replenishing means (not shown).

Published by Nippon Riko Publishing Co., Ltd. “Quickly understandable paints and painting techniques, pages 34-35” (Author: Kenzo Hasegawa)

  In the above-described conventional example, the collected spray paint (paint mist) accumulates in the water tank 102 over time, and also adheres to the inner wall and the like in the booth main body 100, and further constitutes the spiral chamber 107. It also adheres to the water droplet forming member 104 and the concave guide plate 105. For this reason, if left unattended, for example, the space volume in the water tank 102 and the spiral chamber 107 is substantially reduced, so that the water tank 102 not only lowers its water circulation function but also sucks in the spiral chamber 107. Inconvenience that the function of the entire apparatus is halved, such as the ability to make fine water droplets is reduced. In order to avoid this, in the conventional example, the removal operation of the paint mist in the booth main body 100 is periodically performed once a week or once every 10 days, for example.

  However, this paint mist removing operation has required much time and labor. In particular, since the inside of the swirl chamber 107 is not only narrow but also has many corners, there is always an inconvenience that removing the coating mist accumulated inside requires more time and labor than other parts. It was.

  Therefore, in the present invention, the disadvantages of the conventional example are improved, and when removing the paint mist, spray coating that makes it possible to remove the spiral chamber in the booth body more effectively and quickly. The purpose is to provide a booth device.

The booth apparatus for spray painting according to the present invention has a booth main body equipped with an intake / exhaust mechanism at the upper end portion, a water tank at the lower end portion, and an outside air suction port below the front plate facing the painting region. The front plate portion of the above-described outside air inlet of the booth body is equipped with a water droplet forming plate for making fine water droplets in the water tank sucked and moved toward the inside together with the outside air. A swirl chamber is provided inside the outside air inlet as a region where the spray paint is attached to fine water droplets formed by the water droplet forming plate. The paint mist collecting mechanism that collects the fine water droplets together with the spray paint by using the suction moving force in which the fine water drops to which the spray paint is attached in the swirl chamber is sucked by the intake / exhaust mechanism described above and moves upward is described above. It is equipped on the intake / exhaust mechanism side (the center of the booth body).
Here, the spiral chamber described above is provided with a concave guide plate for guiding the outside air sucked from the outside air inlet and the water in the water tank to be sucked and moved upward. Further, the partition plate is provided above the concave guide plate so as to project from the above-described front plate side in a direction covering the concave guide plate. Further, the booth body described above is equipped with a rotation drive mechanism that rotates the water droplet forming plate that forms the outside air inlet described above at a predetermined angle toward the coating region side with the upper end portion as a fulcrum .

  Therefore, in the present invention, first, the water sucked in while being partially pulverized by the water droplet forming plate in the spiral chamber is guided upward by the concave guide plate and discharged inside, and the water droplet forming plate on the front plate side and the upper partition It collides with the plate and partly becomes fine particles, and the rest falls along the water droplet forming plate. The water droplets falling from the water droplet forming plate are accelerated by the outside air continuously sucked in at the same time, and are sucked upward again along the concave guide plate. Thereafter, such a state is repeated while spiraling in the spiral chamber. That is, a swirl of the intake outside air containing fine water droplets and spray paint is generated. During this period, the water droplets are made into fine particles, and at the same time, the spray paint sucked together with the outside air adheres to the water droplets made into fine particles, and some of them are sequentially discharged upward.

  Here, the fine water droplets to which the spray paint is attached in the spiral chamber described above are urged by the intake / exhaust mechanism disposed above and sucked out from the upper opening in the spiral chamber and sucked upward. A paint mist collecting mechanism that collects the fine water droplets together with the spray paint using the suction force of the intake / exhaust mechanism is provided in the center of the booth body. In this case, in the paint mist collecting mechanism, fine water droplets are sequentially and continuously collided with a plate-like member (which may be a net-like member or a plurality of rod-like members), thereby forming large water droplets, which are formed in the water tank. It was set as the structure which collect | recovers spray paint (paint mist) with the said water drop by making it dripped.

  Further, the booth body described above is equipped with a rotation drive mechanism that rotates the water droplet forming plate that forms the outside air inlet described above at a predetermined angle toward the coating region side with the upper end portion as a fulcrum.

Further, the paint mist dropped and collected together with water droplets in the water tank accumulates in the water tank and also adheres to the entire inner wall in the spiral chamber as described above. If this is left unattended, as mentioned above, the operating efficiency of the booth body decreases, but it is not easy to eliminate it.
In this case, in the present invention, as described above, the water droplet forming plate is rotated so that the back surface thereof is exposed to the outside. Therefore, by operating the rotation driving mechanism when the painting operation is stopped, The paint mist adhesion can be observed from the outside, and at the same time, it is possible to shoot the shower while observing the swirl chamber at any time, thereby eliminating the paint mist in the swirl chamber very easily. It was possible to do. As a result, the entire apparatus can always be operated efficiently and smoothly, and an increase in operating efficiency of the booth body can be expected.

Further, the pivoting drive mechanism described above, and configured to rotated by a predetermined angle toward the coating region side as described above and a concave guide plate mentioned above and water droplets forming plate described above as a fulcrum of each upper portions, respectively.

In this case, when this rotation drive mechanism is activated when the painting operation is stopped, the entire water droplet forming plate is first rotated and its lower end is set to protrude from the outside air inlet toward the coating area. At the same time, the concave guide plate can be set so that its lower end protrudes toward the outside air inlet. For this reason, the spray paint (paint mist) adhered or deposited in the spiral chamber or in the water tank can be easily removed from the outside in a short time by spraying cleaning water or the like.
Here, with respect to the rotation drive mechanism described above, two support shafts that individually support the water droplet forming plate and the concave guide plate, respectively, and an interlocking mechanism that is constructed between the support shafts and interlocks the support shafts. And a driving means for urging the driving force to the interlocking mechanism (claim 1).

Moreover, the use manual of the lever mechanism as the driving means, this lever mechanism, may be features a lever holding mechanism for holding it in position with the lever mechanism rotated by a predetermined angle (claim 2) .
In this way, the interlocking mechanism functions effectively, and the water droplet forming plate and the concave guide plate can be operated simultaneously and easily by the operation of the interlocking mechanism (in the case of a lever mechanism, simultaneously by a single operation). The paint mist removal operation can be performed efficiently and quickly.

Moreover, this In the turning drive mechanism, may be set larger than the rotation angle of the rotation angle concave guide plates of the water droplet forming plate (claim 3). By increasing the rotation angle of the water droplet forming plate located in front of the outside air inlet, the concave guide plate located at the back rotates toward the front, so that the cleaning can be performed easily and quickly. It can be done conveniently.
In this case, the maximum rotation angle of a water drop forming plate set at 9 0 °, the rotational angle of the concave guide plate may be a maximum 50 ° (claim 4). If it does in this way, the concave surface part of the concave guide plate located in the back will be set in the state exposed toward the front, without being obstructed by the water droplet formation board, and there exists an advantage that it is easy to clean for this reason.

Furthermore, a drain outlet is provided on the back side of the booth body described above, and a drain door that can be opened and closed is provided at the drain outlet, and the bottom of the water tank described above is inclined downward from the outside air inlet toward the drain outlet. It is good also as a surface (Claim 5 ). In this way, since the paint mist is continuously discharged in one direction together with the cleaning water at the time of cleaning, the working efficiency can be greatly improved, which is convenient.
The drain door described above may be a negative pressure operated drain door that is always open when the operation of the entire apparatus is stopped and is closed when the inside of the booth body is in a negative pressure state (Claim 6 ).
In this way, the water in the water tank is automatically discharged when the operation is stopped, so that the amount of paint mist accumulated can be drastically reduced. In this respect, not only the cleaning operation is accelerated, but also the spray paint recovery is performed. The water in the water tank can be always used fresh, so that the spray paint can easily adhere to fine water droplets, and the recovery ability of the spray paint (paint mist) can be greatly improved. It is possible to reduce the amount of paint mist released to the surface.

Furthermore, a concavo-convex portion for promoting water droplet formation is continuously provided from one end on the same line to the other end on the edge portion of the lower end portion of the water droplet forming plate, and at least each convex portion of the concavo-convex portion is provided. Alternatively, it may be bent toward the downstream side of the intake air (claim 7 ). In addition, on each of the edge portions of the upper end portion of the concave guide plate and the end portion on the protruding side of the partition plate, an uneven portion for promoting water droplet formation is continuously provided from one end to the other end, may be bent alternately in opposite directions of each convex portion of each uneven portion (claim 8). In this case, it may be the shape of the convex portion of the concavo-convex portion as chevron shaped (claim 9). Moreover, the bending angle of each convex part of the above-mentioned uneven | corrugated | grooved part may be bent in the range of 0 degree-90 degrees in the opposite direction every other (claim 10 ).

In this way, since the tip of the water droplet descending along the water droplet forming plate in the spiral chamber is divided into a plurality of portions, it is possible to place the dropped water droplets on the intake outside air in a state of being dispersed in advance. For this reason, the formation of fine water droplets can be further promoted. Further, when the tip portion is an acute-angled ridge-shaped concavo-convex portion, the time for the water droplets to stop at the tip portion is reduced, and in this respect, formation of fine water droplets can be promoted.
Then, every other convex part of the concave and convex parts is bent in the opposite direction in a range of a bending angle of 0 ° to 90 °, so that when the outside air passes through this region at high speed, the outside air is stirred and negative pressure unevenness and Fluctuations become so intense that a favorable environment is created locally for water droplets to become finer, and at the same time spray paint is caught in this region, so that the spray paint is more likely to adhere to fine water droplets. Therefore, it can be expected to improve the recovery efficiency of the paint mist (effective suppression of environmental pollution).

The above-mentioned water droplet forming plate is composed of a fixed plate fixed to the support shaft and a slide plate equipped so as to reciprocate along the fixed plate in a direction away from the support shaft. may have a structure of providing a concave-convex portion at the distal end of the slide plate (claim 11). Further, each of the above-described concave guide plate and partition plate can be reciprocally moved along a fixed plate fixed to each support shaft and in a direction away from the above-described support shaft or the front plate along the fixed plate. together constituting between instrumented slide plate may have a structure of providing a concave-convex portion at the distal end of each slide plate movable plate (claim 12).
In this way, the size of the outside air inlet and the size of the inside outside air passage can be adjusted, and there is an advantage that an air passage having a size corresponding to the paint to be used can be set. Obtainable.

  Since the present invention is configured and functions as described above, according to this, it is possible to easily and efficiently execute the paint mist removing operation in the booth body, particularly in the swirl chamber, and as a result, spray paint (paint mist). It is possible to continue to maintain the recovery capacity for a long time in a good state, and this reduces the amount of paint mist released to the outside and can effectively suppress environmental pollution to the outside. A booth apparatus for spray painting can be provided.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
[Overall contents]
1 to 4, reference numeral 10 denotes a booth body. The booth body 10 sucks spray paint (mist-like paint mist) m that passes through the periphery of the workpiece W during spray coating and is released into the air, and collects much of the spray paint (paint mist collection mechanism 8). : Refer to Fig. 2). The booth main body 10 is provided with side opening / closing doors 10K at the positions of the two-dot chain lines shown in FIG. 2 on both side surfaces (upper portions in FIG. 2 of the rotation drive mechanism 30 described later).
Moreover, in FIG. 1, the symbol T shows the coating jig which hold | maintains the to-be-coated object W rotatably. The coating jig T has a structure in which an upper portion can rotate from the central connecting portion To, and a manual arm Am for rotating the workpiece W is provided on the connecting portion To.

The booth main body 10 is equipped with an intake / exhaust mechanism 1 that sucks up the gas in the booth main body 10 from below and discharges it to the outside, and has a water tank 2 at the lower end, and a painting area (a workpiece W to be coated). There the lower part of the front plate 10A which is provided facing the space region) S placed, and a fresh air inlet 3.
Here, reference numeral 1A indicates a power fan for intake air, and reference numeral 1B indicates a duct having a quadrangular cross section for exhausting the intake outside air sucked from below in the booth body 10 to the outside. As shown in FIG. 2, the intake power fan 1 </ b> A has a structure that can be opened and closed as a whole in the direction of arrow A as necessary.

  A water droplet forming plate 4 for forming water droplets in the water tank that is sucked together with the outside air is provided in a lower portion of the above-described front plate 10A of the booth main body 10. As shown in FIG. 2, an outside air inlet 3 is provided between the water droplet forming plate 4 disposed at the lower portion of the front plate 10 </ b> A and the bottom surface in the water tank 2 described above. In this case, the water droplet forming plate 4 described above includes a continuous uneven portion 4T (see FIG. 4) for forming fine water droplets at the lower end edge portion as described later.

  When the entire apparatus is in operation, as shown in FIG. 2, initially, the lower end edge of the water droplet forming plate 4 is disposed so as to be somewhat submerged in the water in the water tank 2 described above. The water level is set, and the above-described outside air suction port 3 is formed between the lower end edge (uneven portion 4T) of the water droplet forming plate 4 and the bottom surface in the water tank 2 described above. For this reason, the water sucked into the booth main body 10 while passing through here is simultaneously sucked in the form in which the air including the spray paint m and water are mixed by grazing the uneven portion 4T described above.

Further, inside the outside air inlet 3 of the booth main body 10, as will be described later, there is a spiral chamber 7 as a space for adhering the sprayed paint m sucked into water droplets formed during the outside air suction operation. Is provided. The water droplet forming plate 4 constitutes a part (front wall surface) of the spiral chamber 7.
A concave guide plate 5 is provided on the inner side of the water droplet forming plate 4 described above , facing the water droplet forming plate 4 and at a predetermined interval (see FIG. 2) . The concave guide plate 5 efficiently guides the water that has been forcibly sucked through the outside air inlet 3 and the spray paint sucked together with the outside air upward.

As described above , the concave guide plate 5 is provided in the booth main body 10 so as to face the water droplet forming plate 4 and be spaced apart from the water droplet forming plate 4 by a predetermined distance. Further, the concave guide plate 5 faces the water droplet forming plate 4 described above and has a concave longitudinal section. For this reason, for example, the outside air sucked from the left side of FIG. 2 through the outside air inlet 3 and the spray paint m and the water in the water tank 2 are going to go straight to the right as they are due to their inertia. The guide plate 5 is adapted to guide upward.
In addition, a partition plate 6 is projected substantially horizontally on the front plate 10A portion above the water droplet forming plate 4 so as to cover the upper side of the concave guide plate 5 described above. The partition plate 6, the water droplet forming plate 4 and the concave guide plate 5, and the side plates 10B and 10C of the booth body 10 form the spiral chamber 7 (see FIG. 2).

In the spiral chamber 7, as described above, heavy water droplets and spray paint m guided upward by the concave guide plate 5 are partially blocked by the partition plate 6 positioned above and directed downward. Since this is continuously performed, air swirls are generated in the swirl chamber 7, and adhesion of the spray paint to the fine water droplets is promoted.
2 is provided between the right edge of the partition plate 6 in FIG. 2 and the upper edge of the concave guide plate 5 in FIG. 2 to send out fine water droplets upward. For this reason, it is attracted | sucked by the intake / exhaust mechanism 1 equipped upwards, and a part of water droplet and water mass in the spiral chamber 7 mentioned above are continuously sent out from the upper opening part 7A.

  Further, a paint mist collecting mechanism 8 is provided above the partition plate 6 as means for collecting the sprayed paint adhering to the water droplets together with the water droplets, as in the case of the conventional example described above. In the present embodiment, the paint mist collecting mechanism 8 is formed by two inclined partition plates 11 and 12 that are arranged obliquely and horizontally at a predetermined interval.

Of these, the lower sloped partition plate 11 projects obliquely upward toward the front plate 10A described above from the rear plate 10D side in the booth main body 10 while facing the upper opening 7A of the spiral chamber 7 described above. A space for air delivery (air delivery port 11A) is provided between the front end portion and the front plate 10A.
Further, the upper slope-shaped partition plate 12 faces the rear plate 10B described above in the state where it faces the air delivery port 11A of the lower slope-shaped partition plate 11 described above from the front plate 10A side in the booth body 10. It protrudes obliquely upward, and a space for air delivery (air delivery port 12A) is provided between the front end portion and the rear plate 10B.

  For this reason, the water droplet group to which the spray paint is effectively applied in the swirl chamber 7 (and also in the upper opening 7A portion) is continuously sent upward together with other air sucked at the same time. Then, the water droplets sent out from the upper opening 7A collide with the lower inclined partition plate 11 which is disposed oppositely due to its inertia and adhere as spray mist together with the spray paint. Since it is made continuously, it grows into large water droplets and eventually drops together with the paint mist into the lower water tank.

  The same thing is continuously performed on the upper inclined partition plate 12. That is, the water droplet group that has passed through the air outlet 11A of the lower slope-shaped partition plate 11 collides with the upper slope-shaped partition plate 11 and adheres with the spray paint, and grows into large water droplets. In the water tank with the spray paint.

As a result, the paint mist collecting mechanism 8 grows fine water droplets to which the spray paint adheres into large water droplets, thereby effectively collecting the spray paint in the lower water tank 2 as paint mist.
After the spray paint is effectively removed by the water droplets, the air that has been transported is sucked into the intake / exhaust mechanism 1 and discharged to the outside. During this time, part of the fine water droplets are discharged to the outside together with the air, so that the water in the water tank 2 gradually decreases. In such a case, the water is replenished from the outside by the water replenishment system 70 as described later. It is like that.

In the water tank 2 described above, the paint mist accumulates over time by the action of the paint mist collecting mechanism 8. In this case, as shown in the above-described conventional example, it is not easy to remove the paint mist in the water tank 2 (particularly in the spiral chamber 7).
Therefore, in the present embodiment, as described later, the water droplet forming plate 4 or the water droplet forming plate 4 and the concave guide plate 5 are rotated forward in the time zone when the operation of the apparatus is stopped (necessary). It is equipped with a rotation drive mechanism 30 having a structure (which can be held in accordance with the above), so that an operator can deposit or adhere to the inside of the spiral chamber 7 and the bottom of the water tank 2 from the outside without entering the booth body 10. The applied paint mist can be easily removed by spraying water or the like.

Moreover, in this embodiment, the drainage door 50 which discharges outside with the spray paint (paint mist) which collect | recovered the water in the water tank 2 is provided, Especially when the inside of the booth main body 10 mentioned above as this drainage door 50 is a negative pressure state. A negative pressure drain door with a closed configuration was adopted.
Thus, all the water in the water tank 2 is surely discharged when the entire apparatus is not in operation, and the amount of paint mist deposited in the water tank 2 is minimized. Furthermore, in this embodiment, the water used for collecting the spray paint is provided with a natural circulation type water circulation system so that the water in the water tank 2 can be repeatedly used.

[About the water droplet forming plate 4]
Next, the water droplet forming plate 4 described above will be further described in detail.
As described above, the water droplet forming plate 4 forms a part of the spiral chamber 7, and continues downward from the lower end portion (the front end portion of the water droplet forming plate 4) of FIG. A mountain-shaped uneven part 4T is provided (in a sawtooth shape) (see FIGS. 4 to 7). In the present embodiment, the water droplet forming plate 4 is formed as a whole by being divided into three for convenience of processing, and is integrated as a single water droplet forming plate 4 later.
As shown in FIGS. 4 to 7, the water droplet forming plate 4 is provided with a rotation fulcrum on the inner side of the upper end portion, and a support shaft 15 for fixing and supporting the water droplet forming plate 4 is fixed to the portion. ing. The support shaft 15 is rotatably held by the booth body 10 described above.

  Further, as shown in FIGS. 5 to 7, the upper edge 4 </ b> A portion of the water droplet forming plate 4 has a longitudinal cross section projecting outwardly in a semicircular arc shape and curved. For this reason, when the lower end portion of the water droplet forming plate 4 is rotated outward with the support shaft 15 as the center, the upper end edge side is a sliding operation from a state in which the lower end side is in line contact with the lower end edge of the front plate 10A. At this point, the upper edge 4A has no catching portion, so that the water droplet forming plate 4 rotates relatively smoothly during the opening / closing sliding operation.

Further, as described above, a continuous mountain-shaped concavo-convex portion 4T protrudes downward (in a sawtooth shape) from the lower edge portion of the water droplet forming plate 4. In the present embodiment, the ridge-shaped concavo-convex portions 4T are further processed and set in a state in which the concavo-convex portions 4T are alternately bent at a predetermined angle in opposite directions.
In this case, as shown in FIG. 7, each apex angle α1 (see FIG. 7C) is first processed to about 90 ° (the trough angle α2 is also processed to about 90 °). Thereafter, the uneven portions 4T are staggered in the opposite direction by a predetermined angle β1.
(See FIG. 7 (A)). Here, FIG. 7C shows the concavo-convex portion 4T viewed along the arrow C1 in FIG.

In FIG. 7A, the angle β1 at which the bending is alternately performed is set to about 30 ° in the present embodiment with respect to the plate surface before the bending. For this reason, the bent angle β2 between the adjacent convex portions 4t
Are generally bent in opposite directions with an inclination of about 60 °. In this case, in each concavo-convex portion 4T, since the convex portion is alternately bent to one side and the other as described above, turbulent flow is increased in this portion, and at the same time, repeated repeated negative pressure fluctuations occur. The formation of fine water droplets is effectively promoted.
Here, the bending angle β1 in FIG. 7A described above is not necessarily 30 ° as long as it is in the range of 0 ° to 90 °. In this case, a bent angle β2 between adjacent convex portions 4t
However, as long as it is in the range of 0 ° to 90 ° as a whole, it is not necessarily 60 °.

  5 and 7, an arrow K1 indicates the rotation direction of the water droplet forming plate 4 that is operated during cleaning. Here, the code | symbol 16 shows the stopper for the water droplet formation board 4 to function smoothly in a fixed position at the time of operation | movement (it abbreviate | omits in FIG. 5). The stopper 16 is formed of a U-shaped material having a U-shaped cross section, and both ends thereof are fixed to the booth main body 10 described above. The stopper 16 may be an L-shaped member having an L-shaped cross section or a rod-shaped member such as a tube.

[Other components of the spiral chamber 7]
As described above, the spiral chamber 7 described above includes the side plates 10B and 10C of the booth main body 10, the water droplet forming plate 4, the concave guide plate 5 provided on the inner side of the booth main body 10 opposite thereto, and the water droplet formation described above. A space surrounded by the partition plate 6 provided above the plate 4 is configured (see FIG. 2) .
The concave guide plate 5 located at the back (at the rotational speed) starts to rotate with its lower end protruding forward. Then, in a state after the water droplet forming plate 4 has been rotated 90 ° from the state where it hangs down, the concave guide plate 5 has been rotated about 50 °, and when viewed from the front side of the booth body 10 (FIG. 1), Since the back surfaces of the forming plate 4 and the concave guide plate 5 are simultaneously rounded, spray cleaning with water for washing is facilitated, and the battlefield on both surfaces of the water droplet forming plate 4 and the concave guide plate 5 is reliably and easily executed. be able to.

First, the concave guide plate 5 will be described in detail.
As shown in FIG. 8, the concave guide plate 5 has an overall concave angle Q of, for example, 65 ° to 90 ° in the guide plate main body 5 </ b> A in this embodiment, and a lower end tip 5 </ b> B (FIG. 8). (See (A)) is bent in a direction to further open the aforementioned concave angle Q by the opening angle E1. Here, the opening angle E1 of the lower end tip 5B is set to about 5 ° in this embodiment. As a result, the water in the water tank 4 is easily sucked into the spiral chamber 7. The concave angle Q described above may be about 65 ° to 120 °.

  Here, on the back side (the inner bottom surface side of the water tank 2) of the lower end tip 5B portion, an appropriate gap is provided between the lower end tip 5B portion of the concave guide plate 5 and the inner bottom surface of the water tank 2 at a plurality of locations. A spacer 5Ba for setting (a gap through which water can flow) is provided (see FIG. 2). For this reason, a part of the water sucked from the outside air suction port 3 is pushed out from the back side (drainage door side) of the concave guide plate 5 to the outside air suction port 3 side and replenished, thereby contributing to water droplet formation. ing.

  As shown in FIGS. 5 and 8, the guide plate main body 5 </ b> A is provided with a plurality of support members 18 fixed substantially vertically on the back side of the curved portion. The support member 18 is composed of a U-shaped member having a U-shaped cross section, and the upper end portions of the plurality of support members 18 in FIG. It is stuck and fixed. That is, the guide plate main body 5A is held by the support shaft 17 via a plurality of support members 18, and can rotate in the direction of the arrow K2 together with the rotation operation of the support shaft 17 during cleaning.

The concave guide plate 5 supported by the support member 18 described above is set so that its upper end is inclined by a predetermined angle E2 toward the front plate 10A. In this case, the angle E2 is set to about 30 ° in this embodiment, but it may be 0 ° or an arbitrary angle within the range of 0 ° to 30 °.
Further, the above-described guide plate main body 5A is formed as a whole by being divided into three parts for the convenience of processing, and is later integrated into one guide plate main body 5A (one from the beginning). It may be processed with a sheet). Further, the support shaft 17 holding the guide plate main body 5A is rotatably held at the booth main body 10 at both ends as in the case of the support shaft 15 of the water droplet forming plate 4 described above.

Further, in the upper edge portion of the guide plate main body 5A described above with reference to FIG. 8 (A) (a portion disposed curved in the direction of the angle E2 with respect to the support member 18), a continuous mountain-shaped uneven portion is formed. 5T is provided (in a sawtooth shape) along the direction of the angle E2. The uneven portion 5T is formed in substantially the same manner as the uneven portion 4T of the water droplet forming plate 4 described above.
For this reason, during actual operation, the concave and convex portion 5T functions in the same manner as the concave and convex portion 4T of the water droplet forming plate 4 described above, and has the force that the fine water droplets formed by the water droplet forming plate 4 rapidly suck and move upward. By utilizing this, the fine water droplets are crushed more finely.

In the present embodiment, the mountain-shaped uneven portion 5T is further processed and set in a state where the convex portions 5t are alternately bent at a predetermined angle in the opposite direction.
In this case, at the time of processing, first, the apex angle α1 (see FIG. 8B) of each convex portion 5t is set to about 90 ° as in the case of the conventional example described above (the trough portion angle α2 is also set to about 90). After that, each convex portion 5t is staggered in the opposite direction by a predetermined angle β1.
(Refer to FIG. 8 (A)).

In this case, the angle β1 at which the bending is alternately performed is set to about 30 ° in the present embodiment with respect to the plate surface before the bending (β1).
May not be 30 ° as long as it is in the range of 0 ° to 90 °). For this reason, the bent angle β2 between the adjacent convex portions 5t is bent in the opposite direction with an inclination of about 60 ° as a whole (where β2
May not be 60 ° in the range of 0 ° to 180 °).
As a result, when the fine water droplets and the sucked outside air pass through the uneven portion 5T, when the sucked outside air passes through the uneven portion 5T, the outside air is stirred and the turbulent flow of the outside air is caused. It becomes intense and local fluctuation of negative pressure is activated, which further promotes the formation of fine water droplets, and spray paint (paint mist) m that flows at the same time is more likely to adhere to the fine water droplets. It becomes a state.

Reference numeral 19 denotes a stopper for the concave guide plate 5 to function smoothly at a fixed position during operation. The stopper 19 is formed of a U-shaped material having a U-shaped cross section like the stopper 16 described above, and both ends thereof are held by the booth main body 10 described above.
The stopper 19 may be an L-shaped member having an L-shaped cross section or a rod-shaped member such as a tube. Moreover, in FIG. 8 (A), the code | symbol 41F shows the inclined floor surface which is the inner bottom face of the water tank 2 mentioned later.

Next, the partition plate 6 on the ceiling side of the spiral chamber 7 will be described in detail.
As shown in FIGS. 5 and 9A, one end of the partition plate 6 is fixed to the lower end of the front plate 10A, and the other end is disposed substantially horizontally toward the inside of the booth main body 10. ing. For this reason, the partition plate 6 has a function of pushing a part of fine water droplets rising from below and the intake outside air downward. As a result, in the spiral chamber 7, a spiral is generated by the downward airflow generated along the front plate 10 </ b> A by the partition plate 6 and the upward airflow generated by the concave guide plate 5 described above.

Furthermore, this partition plate 6 has a tip portion (the right end edge portion in FIG. 9A) that is continuous to the same as the mountain-shaped uneven portion 4T formed on the water droplet forming plate 4 in FIG. A mountain-shaped uneven portion 6T is provided (in a sawtooth shape). The uneven portion 6 </ b> T of the partition plate 6 constitutes an edge of the upper opening 7 </ b> A of the spiral chamber 7.
For this reason, during actual operation, the uneven portion 6T of the partition plate 6 functions in the same manner as the uneven portion 4T of the water droplet forming plate 4 described above. That is, the fine water droplets in the spiral chamber 7 collide with the concave and convex portion 6T when a part thereof rapidly moves (sucks out) from the inside of the spiral chamber 7, so that the negative pressure of this portion is reduced. The fluctuation is locally intense, and the fine water droplets are further finely crushed or disturbed (by the uneven portion 6T), and the spray paint is effectively attached.

In the present embodiment, the ridge-shaped uneven portion 6T is processed and set in a state where the respective convex portions 6t are alternately bent at a predetermined angle in opposite directions, as in the case of the ridge-shaped uneven portions 4T and 5T described above. It has become a thing. For this reason, in such a case, the change in the turbulent flow of the fine water droplets at the uneven portion 6T is further increased, and the spray paint is more effectively adhered.
Here, when machining each convex portion 6t, first, the apex angle α1 (see FIG. 9C) of each convex portion 6t is set to about 90 ° as in the case of the conventional example described above (the trough portion). After that, the angle α2 is also processed to about 90 °), and thereafter each of the convex portions 6t is staggered in the opposite direction by a predetermined angle β1.
(Refer to FIG. 9 (A)). FIG. 9C shows the uneven portion 6T when the uneven portion 6T disclosed in FIG. 9A is viewed from the direction of the arrow C3.

In this embodiment, the bending angle β1 in the case of alternately bending is set to about 30 ° with respect to the plate surface before bending (β1
May not be 30 ° as long as it is in the range of 0 ° to 90 °). For this reason, the bending angle β2 between the adjacent convex portions 6t is generally bent in the opposite directions with an inclination of about 60 ° (where β2
May not be 60 ° in the range of 0 ° to 180 °).
As a result, when the sucked outside air passes through the uneven portion 6T, the outside air is agitated and the turbulent flow of the outside air becomes intense, and the local fluctuation of the negative pressure is activated. Water droplet formation is further promoted, and the spray paint (paint mist) m flowing together is more likely to adhere to the fine water droplets.

  Thus, in the swirl chamber 7, the fine water droplets sucked through the outside air suction port 3 and formed on the water droplet forming plate 4 are swirled together with the outside air and the spray paint m simultaneously sucked, and the spray paint m itself Partially adheres to the surrounding members together with water droplets, but many effectively adhere to the fine water droplets moving together in the space. Furthermore, when the fine water droplets are sent upward from the spiral chamber 7, the fine water droplets are further subdivided by the uneven portions 6T of the partition plate 6 and the uneven portions 5T of the concave guide plate 5, Accordingly, the spray paint m is sent upward from the spiral chamber 7 while adhering to the fine water droplets more effectively. That is, even in the process of being transferred upward from the spiral chamber 7, the adhesion of the spray paint m to the fine water droplets is further effectively promoted as described above.

[Overall function of the spiral chamber 7]
When the entire apparatus is set in an operating state and the above-described intake / exhaust mechanism 1 operates, the air in the booth body 10 is continuously sucked upward, and a negative pressure is generated in the booth body 10. Due to this negative pressure, water in the water tank 2 located below is sucked together with the outside air from the outside air inlet 3 into the swirl chamber 7, and at the same time, unnecessary spray paint m injected into the coating region S is also swirled together with the outside air. 7 (see FIG. 6).

Here, in the outside air inlet 3 portion, the water droplet forming plate 4 that forms a part of the spiral chamber 7 functions as described above, and the water in the water tank to be sucked is partially pulverized by the uneven portion at the lower end portion to form water droplets. Is done. The water and outside air in the water tank including the water droplets are guided by the concave guide plate 5 at the suction destination and sent out obliquely upward (see arrows a, b, and c in FIG. 6). During this time, part of the spray paint adheres to the water droplets.
The water and the outside air sent obliquely upward are partly sucked into the booth main body 10 together with the spray paint above the concave guide plate 5 (see arrows e and f in FIG. 6). . At the same time, a heavy water droplet portion (a large water mass that cannot be formed into a water droplet) (together with a large amount of outside air) moves toward the partition plate 6 above the straightness of movement. During this time, part of the outside air and the refined water droplets are sucked upward from the upper opening 7A. On the other hand, the outside air and heavy water droplets directed to the partition plate 6 collide with the partition plate 6 together with the outside air and are directed downward.

For this reason, a heavy water droplet part falls along the above-mentioned water droplet formation board 4, and is dripped from the uneven | corrugated | grooved part 4T to the external air inlet 3 part. In this case, since the spray paint m and the outside air are continuously sucked in the outside air inlet 3, the dropped water droplets are united with the spray paint m and the outside air again toward the concave guide plate 5. Thereafter, the above-described state (swirl state) is repeated, and during this time, the water droplets are made finer and the spray paint m adheres to the fine water droplets effectively. The fine water droplets continuously move upward from the upper opening 7A together with the spray paint.
That is, a part of the fine water droplets to which the spray paint m is applied in the swirl chamber 7 is sucked by the intake / exhaust mechanism 1 equipped above and continuously sent out from the upper opening 7A. Thereafter, the paint mist is effectively collected in the water tank 2 by the paint mist collecting mechanism 8 as described above.

[Another example of the spiral chamber 7]
In the spiral chamber 7 described above, the case where the set positions of the concave and convex portions 4T, 5T, 6T of the water droplet forming plate 4, the concave guide plate 5 and the partition plate 6 constituting the spiral chamber 7 are illustrated as being fixed. Here, a slide type that can be adjusted by sliding the set positions of the concavo-convex portions 4T, 5T, and 6T will be described.

  In FIG. 13, the spiral chamber 97 includes a water droplet forming plate 94, a concave guide plate 95, and a partition plate 96 that are formed in the same manner as the spiral chamber 7 described above and arranged in the same manner. As shown in FIG. 14, the water droplet forming plate 94 includes a fixed plate 94A, a slide plate 94B that reciprocates along the fixed plate 94A in the direction away from the support shaft 15 (arrow S), and the slide plate 94B. A slide mechanism 94C that allows the plate 94B to reciprocate in the vertical direction of FIG. 2 is provided. The slide mechanism 94C is provided at at least two places on the water droplet forming plate 94. The slide plate 94B is formed with the above-described uneven portion 94T at the tip of the slide plate 94B. Here, the uneven portion 94T is formed in the same manner as the uneven portion 4T of the water droplet forming plate 4 described above.

As shown in FIG. 14, the slide mechanism 94C has a long hole 94Ba formed in the slide plate 94B, and a screw portion 94E that fixes the slide plate 94B to the fixing plate 94A through the long hole 94Ba at two locations. It is configured. The elongated hole 94Ba is formed in a direction orthogonal to the support shaft 15 described above.
The screw portion 94E is composed of a male screw 94Ea with a washer and a female screw 94Eb, and the female screw 94Eb portion is fixed to the fixing plate 94A. For this reason, when the male screw 94Ea is loosened, the position of the screw portion 94E is not changed, and the slide plate 94B is set so as to be reciprocally movable along the elongated hole 94Ba, and can be arranged at an arbitrary position.
For this reason, when equipped with this, the size of the above-described outside air inlet 3 can be freely adjusted, and the outside air inlet 3 having an appropriate size can be set according to the paint used in spray painting. There is a coating booth suitable for multipurpose use.

  The concave guide plate 95 and the partition plate 96 are also fixed plates 95A and 96A from the support shaft 15 or the front plate 10A side along the fixed plates 95A and 96A, as in the case of the water droplet forming plate 94 described above. Slide plates 95B and 96B that reciprocate in the direction of separation, and slide mechanisms 95C and 96C that allow the slide plates 95B and 96B to reciprocate along the aforementioned fixed plates 95A and 96A are provided (FIG. 13). reference).

  The slide mechanisms 95 </ b> C and 96 </ b> C are configured in the same manner as in the case of the water droplet forming plate 94 described above, and are provided in at least two places as in the case of the water droplet forming plate 94. The slide plates 95B and 96B are provided with concavo-convex portions 95T and 96T similar to the concavo-convex portion 94T of the water droplet forming plate 94 described above at the tip portions of the slide plates 95B and 96B, respectively. Here, the uneven portions 95T and 96T are formed in the same manner as the uneven portion 94T of the water droplet forming plate 94 described above. In addition, the convex portions 94t, 95t, and 96t constituting the concave and convex portions 94T, 95T, and 96T are individually bent in any direction within a range of 0 ° to 90 ° as needed. ing.

  For this reason, since the slide mechanism 95C, 96C is made to function so that the size of the air passage upward in the spiral chamber 97 can be adjusted, the direction and amount of the outside air and water sucked upward can be adjusted. There is an advantage that it can be appropriately adjusted according to the quality and can be set while adjusting the optimum adsorption environment to the water droplets of the spray paint in this respect.

[About the rotation drive mechanism 30]
The above-described spiral chamber 7 has a rotational drive that causes the lower end side of the water droplet forming plate 4 and the concave guide plate 5 constituting the spiral chamber 7 to undulate and rotate from the suspended state toward the horizontal direction. A mechanism 30 is also provided (see FIGS. 1 to 4, 6 to 8, and 10).

  The rotation drive mechanism 30 is constructed between two support shafts 15 and 17 for individually holding the water droplet forming plate 4 and the concave guide plate 5 on the upper end side, and between the support shafts 15 and 17. The interlocking mechanism 31 that interlocks the support shafts 15 and 17 at the same time, and the lever mechanism 33 as a driving means that urges the interlocking mechanism 31 to apply a driving force are provided. The lever mechanism 33 as a driving means is provided with a lever holding mechanism 35 for holding the lever mechanism 33 at a predetermined position.

As shown in FIGS. 2 to 3 and FIGS. 5 to 6, the support shafts 15 and 17 are disposed in parallel on the same horizontal plane and are rotatably held on both side surfaces of the booth body 10.
In the interlocking mechanism 31 in this embodiment, the rotation angle of the water droplet forming plate 4 is set larger than the rotation angle of the concave guide plate 5 described above. Specifically, when the maximum rotation angle of the water droplet forming plate 4 described above is set to about 90 °, the rotation angle of the concave guide plate is set to about 50 ° at the maximum.

This will be described in more detail. First, in the present embodiment, the interlocking mechanism 31 described above is installed below the left end of the front view shown in FIG. 1, and the lever mechanism 33 and the lever holding mechanism 35 are shown in the front view shown in FIG. Equipped below the right end.
Among these, as the interlocking mechanism 31, a chain wheel mechanism is adopted in the present embodiment, whereby the rotation angle of the water droplet forming plate 4 and the rotation angle of the concave guide plate 5 are always the water droplet forming plate even in repeated use. No. 4 is designed to rotate greatly.

  Here, for example, a chain wheel 31A having a diameter of 100 [mm] is fixed to the support shaft 15 that supports the water droplet forming plate 4 described above, and the support shaft 17 that supports the concave guide plate 5 is attached to the support shaft 17 that supports the concave guide plate 5. For example, a chain wheel 31B having a diameter of 180 [mm] (in the case of a chain wheel PCD) is fixedly mounted, and both are connected by an endless chain 31C. For this reason, when the concave guide plate 5 is rotated about 50 °, the water droplet forming plate 4 is simultaneously rotated at a rotation angle of about 90 °.

  For this reason, when the interlocking mechanism 31 is operated, when viewed from the front plate 10A side of the booth main body 10 (see FIG. 1), first, the lower end portion of the water droplet forming plate 4 is rotated forward and protruded at the same time. The concave guide plate 5 located in the back begins to rotate with its lower end protruding forward (at a lower rotational speed than in the case of the water droplet forming plate 4). Then, in a state after the water droplet forming plate 4 has been rotated 90 ° from the state where it hangs down, the concave guide plate 5 has been rotated about 50 °, and when viewed from the front side of the booth body 10 (FIG. 1), Since the back surfaces of the forming plate 4 and the concave guide plate 5 are simultaneously rounded, spray cleaning with water for washing is facilitated, and the battlefield on both surfaces of the water droplet forming plate 4 and the concave guide plate 5 is reliably and easily executed. be able to.

  As shown in FIGS. 1, 3 and 10, the lever mechanism 33 as a driving means is disposed above the support shaft 17 (support shaft supporting the concave guide plate 5) of the larger chain wheel 31 B of the interlock mechanism 31. It is equipped with a connection. The lever mechanism 33 includes an operation lever 33A having a relatively long length, and a grip portion 33B fixed to a distal end portion (rotating end portion) of the operation lever 33A. The rear end portion (rotation center portion) of the operation lever 33A is fixedly mounted on the support shaft 17 described above.

In FIG. 10, symbol G1 indicates the operation range of the operation lever 33A, and symbol G2 indicates the rotation range of the chain wheel 31B (maximum rotation operation range of the concave guide plate 5). The lever holding mechanism 35 described above is for setting the rotation range of the chain wheel 31B, and the concave shape described above at a position corresponding to the front end (rotation end) side at the center of the operation lever 33A described above. Corresponding to the position where the maximum rotation operation range of the guide plate 5 is set, the guide plate 5 is fixedly mounted at a predetermined position on the right side surface of the booth body 10 described above.
For this reason, the cleaning operation in the booth main body 10 can be stopped by being fixed to the maximum rotational operation range of the concave guide plate 5 by the lever holding mechanism 35, so that only one worker can perform the cleaning operation smoothly. Can do.

  The operation lever 33A of the lever mechanism 33 is equipped with an operation force assist mechanism 38 on the rear end side (rotation center side). The operation force assisting mechanism 38 is equipped in response to an increase in the size of the water droplet forming plate 4 and the concave guide plate 5 and requires a relatively large amount of power for the rotation operation. This is for applying initial turning power in advance in the direction of rotation of the guide plate 5.

  Therefore, the operating force assisting mechanism 38 includes a tension spring 38A, a fixed locking plate 38B having a plurality of anchoring portions for variably setting the initial value of the spring force of the tension spring 38A, and the fixed locking plate 38B. A locking piece 38C is provided which can be engaged with each anchoring portion 38Ba of the plate 38B and is provided at the other end of the tension spring 38A. One end of the tension spring 38A is locked at a position where the above-described operation lever 33A can be applied with an appropriate initial turning force on the rear end side (rotation center side) of the operation lever 33A. .

  Therefore, the initial turning force in the operating direction of the operating lever 33A can be freely changed by freely changing the engaging position of the locking piece 38C with respect to each of the anchoring portions 38Ba of the fixed locking plate 38B in the operating force assisting mechanism 38. The lever mechanism (driving means) 33 with good operability can be obtained.

[Other Configurations Regarding the Rotation Drive Mechanism 30]
Here, in this embodiment, the case where the chain wheel mechanism is equipped as the interlocking mechanism 31 is illustrated, but other interlocking mechanisms such as a V belt mechanism and a holed belt mechanism may be used. As for the size and ratio (difference in rotation angle) of the chain wheels 31A and 31B of the chain vehicle mechanism 31, for example, the rotation speed and rotation angle of the water droplet forming plate 4 and the concave guide plate 5 are made the same, etc. You may change suitably according to a use condition.

In the present embodiment, the lever mechanism 33 as the driving means is provided on the support shaft 17 (support shaft supporting the concave guide plate 5) of the larger chain wheel 31B. You may equip to 31 A of support shafts 15 (support shaft which supports the water droplet formation board 4).
Furthermore, in the present embodiment, the case where the chain wheel mechanism 31 is provided as the interlocking mechanism and the water droplet forming plate 4 and the concave guide plate 5 are simultaneously rotated is illustrated. However, the lever mechanism 33 as the interlocking mechanism is provided. Alternatively, the support shaft 15 that supports the water droplet forming plate 4 may be directly equipped with a lever mechanism 33 as a driving means so that only the water droplet forming plate 4 is swung up and down.
Even in this case, the water droplet forming plate can be rotated to expose the back surface to the outside, so that the outside air inlet 3 is opened, and the adhesion state of the paint mist in the spiral chamber is observed from the outside. However, it is possible to perform the operation of spraying the shower at any time, and the paint mist adhering to the back side of the concave guide plate 5 can be effectively removed by the conventional method (operation of the opening / closing mechanism on the left and right sides of the booth body 10). As a result, the overall work efficiency can be improved, whereby the entire apparatus can always be operated efficiently and smoothly, and an increase in operating efficiency of the booth body can be expected.

[Water tank and drain door]
The water tank 2 provided in the lower region of the booth main body 10 includes a water tank main body portion 41 for collecting paint mist and a painting work water tank portion 42 provided alongside the water tank main body portion 41. The water tank main body 41 and the painting water tank 42 are partitioned by a water-permeable member 41A such as a wire mesh.
The water tank body 41 is set in a region surrounded by the back plate 10D and the side plates 10B and 10C of the booth body 10. Moreover, the water tank part 42 for painting work is arrange | positioned in the location where the right side part of the water tank main-body part 41 protrudes in the front in the area | region of the right side part 2/3 of the front of FIG. 1 (refer FIG. 3). The inner bottom surface of the painting work water tank section 42 is set to be horizontal. As shown in FIG. 1, a coating jig T configured to hold the object to be coated W from the inner surface side and to be rotatable is detachably disposed in the water tank 42 for painting work. . In FIG. 3, the arrow Wd
Indicates the flow of room air set toward the booth body 10 in the same direction.

Then, a spraying paint engineer or an automatic sprayer is applied to the corner area Z of the left side in FIG. 3 of the water tank part 42 for painting work projecting from the water tank body part 41 on the front side of the water tank body part 41 described above. A painting gun to be installed at the time of work is arranged. The symbol X indicates a location where the painting engineer or painting gun is disposed (see FIG. 3).
For this reason, the painting work in the present embodiment is a spray painting work from a direction orthogonal to the indoor air flow Wd flowing toward the booth main body 10, and this is behind the air flow flowing in as in the prior art. Unlike the painting work to be received, the turbulence of the indoor air with respect to the object to be coated is reduced, so that it is possible to effectively avoid the contamination of the dust accompanying the turbulent flow.

  The inner bottom surface (floor surface) 41F of the water tank main body 41 described above is an inclined surface that is somewhat inclined from the left to the right in FIG. The inclination angle of the inner bottom surface 41 </ b> F of the water tank main body 41 may be any number as long as the drainage can flow to the back side of the booth main body 10. And the drain port 2K which discharges the water in the water tank 2 mentioned above is provided in the location (the right end part in FIG. 2: the back side of the booth main body 10) where the flow direction is low by the inclination of the inner bottom surface 41F. A drainage door 50 is provided at the 2K portion.

In this embodiment, the drainage door 50 is equipped with a negative pressure drainage door that is normally set in an open state and is closed when the inside of the booth body 10 is in a negative pressure state.
The negative pressure drain door 50 is equipped with a pivotable door main body 51 having a pivot fulcrum 50a in the upper part of the drain outlet 2K and a position of the door main body 51 facing the drain outlet 2K described above. A drain outlet shielding member 52 and a compression spring 53 that is disposed in the upper part of the drain outlet 2K and constantly presses the door main body 51 in the opening direction are provided. When the operation of the entire apparatus is stopped, the above-described compression spring 53 functions to constantly press the door body 51 to the position indicated by the dotted line in FIG. 2, whereby the drain port 2K rotates and opens with the rotation fulcrum 50a as a fulcrum. Is set to the state. Reference numeral 51b denotes a stopper for the door body 51.

  For this reason, when the operation of the entire apparatus is stopped, the above-described intake / exhaust mechanism 1 is stopped, so that the inside of the booth body 10 is changed from a negative pressure state to a normal atmospheric pressure state. The door main body 51 is pressed to the position of the dotted line in FIG. 2, whereby the drain port 2K is opened, and the water in the water tank 2 is discharged in a state including a part of the coating mist (before deposition). In this case, the water in the painting water tank 42 is also drained at the same time. Reference numeral 55 denotes a drainage channel for sending the drainage from the drainage port 2K to a predetermined water tank provided outside. Here, the inner bottom surface 42F portion of the water tank 42 for painting work may also be an inclined surface that is continuous with the inner bottom surface 41F as in the case of the inner bottom surface 41F of the water tank main body 41 described above.

For this reason, the amount of the coating mist staying in the water tank 2 is remarkably reduced, and even in the long-term operation, in the booth body 10 together with the paint mist that collects the water in the water tank 2 every time the operation of the entire apparatus is stopped. Since it is discharged and replaced, it has an advantage that accumulation (deposition) of paint mist in the booth body 10 can be effectively suppressed.
Here, the drainage door 50 described above is equipped with a normally closed key that can be freely opened and closed on the door body 51, and is used by setting it to a normally closed state regardless of the negative pressure in the booth body 10 as necessary. May be.

[About water circulation / water supply system]
The water tank 2 described above is provided with a water circulation system 60 and a water supply system 70 as shown in FIG. Among these, as shown in FIG. 2, the water circulation system 60 is configured to return the water remaining on the above-described drainage door 50 side in the water tank 2 to the outside region of the above-described outside air inlet 3 in the water tank 2. A water intake 61 provided on the drainage door 50 side in the water tank 2, a circulation pipe 62 for returning water taken by the water intake 61 to the outside area of the outside air inlet 3, and a circulation And a water storage unit 63 for temporarily stopping the water fed through the piping unit 62.

  Among these, the water storage part 63 is arrange | positioned in the bottom part of the outer side area | region of the external air inlet 3 mentioned above of the water tank 2, and in order to circulate water from the water storage part 63 to the water tank 2 in the bottom part of the water tank 2 of the said location. A water passage opening 63A is provided. Here, the water intake 61a of the water intake section 61 is disposed in a region between the water surface and the bottom surface of the water in the water tank 2 described above. In this case, in the coating mist collected in the water tank 2, heavy components are precipitated in the water tank 2, and light components float on the water surface. For this reason, by arranging the water intake 61a of the water intake section 61 as described above, only water can be taken in and reused without inhaling the paint mist.

Here, as shown in FIG. 2, reference numeral 62 </ b> A indicates an opening / closing valve for the circulation piping section 62, and reference numeral 62 </ b> B indicates a drain pipe connection valve provided at the bottom of the water storage section 63.
Further, with respect to the water circulation system 60, the case where the circulation pipe part 62 is provided as shown in FIG. 2 is illustrated, but the water storage part 63 is expanded to the right in FIG. 2 (to the region of the circulation pipe part 62). Then, the circulation piping part 62 is deleted, and the water intake port of the water intake part 61 is expanded to the full width of the water tank 2 described above, whereby the right side region in FIG. 2 in the water tank 2 and the water flow opening 63A described above are formed. You may comprise so that it may communicate via the water storage part 63 (not shown).
In this way, even when there is a shortage of water sucked together with the outside air from the outside air inlet 3, it is possible to respond appropriately with the water on the opposite side in the water tank 2, and there is an advantage that the stability of the operation can be ensured.

In this embodiment, the water replenishment system 70 detects a water storage tank 71, a replenishment pipe 72 that feeds the water in the water storage tank 71 into the water tank 2 described above, and the water level in the water tank 2 described above. The water level sensor 73 and the information from the water level sensor 73 are input, the average value of the fluctuation values is calculated, and a water replenishment signal is output when the average water level falls outside the preset optimum value allowable range. And a control valve 75 that operates when a water replenishment signal is input from the open / close controller 74 and opens the replenishment pipe 72 described above.
Here, the water replenishment port 72a of the replenishment pipe 72 described above is disposed in the water storage unit 63 described above in the present embodiment. Reference numeral 76 denotes a main valve for the refilling pipe 72. The main valve 76 is opened when the entire apparatus is started, and is always open during operation of the apparatus.

  For this reason, in this embodiment, when the water in the aquarium 2 is insufficient, the water level sensor 73 immediately detects this, and the open / close controller 74 operates to issue a water replenishment signal to the control valve 75 to open the replenishment pipe 72. The water is supplied from the water storage tank 71 into the water tank 2. Thereby, in the water tank 2, the amount of water required for collection | recovery of spray paint is always hold | maintained. Reference numeral 72 </ b> A denotes a makeup water jet pipe installed in the water storage tank 71.

On the other hand, when the painting operation is completed and the power supply of the entire apparatus is turned off, as described above, when the operation of the intake / exhaust mechanism 1 is stopped and the inside of the water tank 2 is not in a negative pressure state, the negative pressure drainage door 50 is immediately opened. The water in the water tank 2 is opened and discharged to the outside together with the coating mist as described above.
Then, when the power of the entire apparatus is turned on at the time of resuming the painting work, when the intake / exhaust mechanism 1 is activated and the booth body 10 is set to a negative pressure state, the negative pressure drainage door 50 is immediately activated, The door body 51 is sucked against the compression spring 53, and the drain port 2K is closed. At the same time, the water level sensor 73 of the water replenishment system is activated, the opening / closing controller 74 is activated at the same time, and then the control valve 75 is activated to open the replenishment pipe 72 to supply water from the water storage tank 71 into the water tank 2. As a result, the entire apparatus is set in a state where the painting operation can be performed.
Here, the water tank 71 may be omitted by replacing the water supply by the water storage tank 71 described above with the use of tap water.

[Other examples of water circulation / water supply system]
This is shown in FIG. The water circulation system shown in FIG. 12 uses natural convection associated with a change in the water level in the water tank 2, and the entire apparatus is activated so that the water in the water tank 2 together with the outside air is supplied from the outside air inlet 3. As a result, the water level outside the outside air suction port 3 becomes extremely low, and as a result, the water on the drainage door 50 side in the water tank 2 passes through the gap below the concave guide plate 5 to the outside air suction port 3 side. (Refer to reference numeral f in FIG. 12), the water collected in the booth body 10 is then returned to the water tank 2 in sequence, so that this water circulation cycle is repeated thereafter.

Here, on the back side of the lower end portion tip 5B portion of the concave guide plate 5 (inner bottom surface side of the water tank 2), the lower end tip end 5B portion of the concave guide plate 5 and the inner bottom surface of the water tank 2 are provided at a plurality of locations. A spacer 5Ba is provided for setting an appropriate gap (a gap through which water can flow).
As a result, a water-permeable gap between the lower end tip 5B of the concave guide plate 5 and the inner bottom surface of the water tank 2 is always maintained. For this reason, the water sucked from the outside air suction port 3 is pushed out from the back side (drainage door side) of the concave guide plate 5 to the outside air suction port 3 side and is effectively replenished. In FIG. 12, symbols a and b indicate the direction of the outside air sucked from the outside air inlet 3 and the water suction direction in the water tank 2, and the symbol e indicates the water collected through the side wall in the water tank 2, The symbol f indicates the direction of water pushed out from the back side of the concave guide plate 5 through the lower gap to the outside air inlet 3 side as described above.

  The method shown in FIG. 12 not only has substantially the same function as the water circulation system disclosed in FIG. 2 described above, but also eliminates the need for the circulation piping section 62, the water storage tank 71, etc. There is an advantage that capital investment can be suppressed.

  In addition, the water replenishment system 80 shown in FIG. 12 is additionally provided with a switching valve 81 in the replenishment pipe 72 in the water replenishment system 70 in FIG. 2 described above, and further provided with two replenishment water ejection pipes 81A and 81B. One makeup water jet pipe 81A is installed in the water tank 42 outside the outside air suction port 3 and the other makeup water ejection pipe 81B is installed in the painting work water tank section 42 outside the outside air suction port 3 described above. Features a point. Other configurations are the same as the water replenishment system 70 in FIG. 2 described above.

  In this way, in addition to having the same function as the water replenishing system 70 in FIG. 2 described above, the switching valve 81 is switched as necessary to feed the replenishing water into the painting work water tank section 42 and to There is an advantage that it is possible to eliminate the accumulation of paint mist at the location.

[Overall operation, etc.]
When the entire apparatus is set in an operating state and the above-described intake / exhaust mechanism 1 operates, the air in the booth body 10 is continuously sucked upward, and a negative pressure is generated in the booth body 10. Due to this negative pressure, the water in the water tank located below is sucked into the swirl chamber 7 from the outside air suction port 3 together with the outside air, and unnecessary spray paint sprayed into the coating region S is also brought into the swirl chamber 7 together with the outside air. (See FIG. 6).

  Here, in the outside air inlet 3 portion, the water droplet forming plate 4 forming a part of the spiral chamber 7 functions, and the water in the water tank 2 to be sucked is partially pulverized and formed into water droplets by the uneven portion 4T at the lower end. . The water and outside air in the water tank 2 including the water droplets are guided by the concave guide plate 5 at the suction destination and are sent obliquely upward (see arrows a, b, and c in FIG. 6). . During this time, part of the spray paint adheres to the water droplets.

  The water and the outside air sent obliquely upward are partly sucked into the booth body 10 together with the spray paint m above the concave guide plate 5 (see arrow d in FIG. 6). At the same time, the heavy water droplet portion (water mass that cannot be formed into water droplets) moves toward the partition plate 6 above the straightness of movement together with a large amount of outside air and spray paint. The outside air and heavy water droplet portions directed to the partition plate 6 collide with the partition plate 6 together with the outside air and are directed downward.

  For this reason, a heavy water droplet part falls along the above-mentioned water droplet formation board 4, and is dripped from the uneven | corrugated | grooved part 4T to the external air inlet 3 part. In this case, since the subsequent spray paint m and the outside air are continuously sucked in the outside air inlet 3 portion, the dropped water droplets are integrated with the spray paint m and the outside air at the uneven portion 4T of the outside air inlet 3. Then, it is accelerated again toward the concave guide plate 5, and thereafter the above-described state (swirl state) is repeated. During this time, the water droplets are made finer and the spray paint m adheres to the fine water droplets. In this case, in each concavo-convex part 4T, since the convex part is alternately bent to one side and the other side, turbulent flow is generated in this part, and at the same time, repeated repeated negative pressure fluctuations occur. Water droplets progress at a stretch. The refined water droplets are continuously transferred together with the spray paint m upward from the upper opening 7A.

  Further, the water droplets that continuously move upward from the upper opening 7A collide with the concavo-convex portion 6T at the tip of the partition plate 6 constituting a part of the upper opening 7A, and the upper side of the concave guide plate 5 It is sucked upward while colliding with the mountain-shaped uneven portion 5T at the end. In this case, in each of the concavo-convex portions 5T and the concavo-convex portions 6T, since the convex portions are alternately bent to one side and the other side, turbulent flow is generated in this portion, and at the same time, severe negative pressure fluctuations occur at the same time. The water droplets are made into fine droplets at once. Therefore, the spray paint that is sucked upward and moves at the same time is stirred together with a large amount of fine water droplets in a region where the swirl chamber 7 exits and a large amount of fine water droplets are generated in the repeated repeated fluctuations of negative pressure. A large amount adheres to fine water droplets.

  The fine water droplets to which the spray paint m adheres in the spiral chamber 7 and the upper opening 7A described above sequentially collide with each of the sloped partition plates 11 and 12 of the paint mist collecting mechanism 8 provided above and again paint. It grows large as water droplets containing mist, and is then collected in the lower water tank 2 along the side wall. Hereinafter, such an operation is repeatedly performed, and the spray paint m is effectively collected in the water tank 2 at a considerable rate.

  On the other hand, since a large amount of water is continuously sucked from the outside air inlet 3 during the paint mist collecting operation, the surrounding water level becomes extremely low in the water tank 2 at the location. As a result, the water level on the drainage door side of the water tank 2 becomes high, so that water in this portion is pushed out to the outside air inlet 3 side by the movement of the water due to the water level difference. Here, in the above embodiment, the water circulation system 60 described above including the reuse of the collected water as described above functions effectively, and the movement of the water is performed smoothly in the water tank 2 as described above. As a result, the occurrence of a situation of water deficiency in the outside air inlet 3 is effectively avoided.

  Here, in the above embodiment, since the paint mist and all of the water used cannot be collected, the water in the water tank 2 decreases with time. When such a situation occurs, in this embodiment, as described above, the water supply system 70 (or 80) is immediately activated, and an appropriate amount of water is supplied into the aquarium 2, so that the water circulation system described above functions effectively. It has become.

  Then, when the work schedule of the painting work is finished and the operation of the entire apparatus is stopped, first, the suction / exhaust mechanism 1 is stopped, the negative pressure state in the booth body 10 is released, and the outside air and water suction operation is stopped. To do. At the same time, the compression spring 53 of the drain door 50 described above functions to release the door body 51 from the drain port 2K. Thereby, since the inner bottom face of the water tank 2 is inclined toward the drain outlet 2K, the water in the water tank 2 is discharged out of the water tank 2 together with the recovered coating mist.

  Further, after the operation of the entire apparatus is stopped, the lever mechanism 33 of the rotation drive mechanism 30 is operated when removing the coating mist adhering to or accumulating in the water tank 2. Thereby, the water droplet forming plate 4 is rotated in the range of about 90 ° in the present embodiment via the interlocking mechanism 31, and the concave guide plate 5 is rotated in the range of 50 ° in conjunction with this. As a result, the above-described outside air suction port 3 is largely open, so that water is injected from the front side (the painting work area side) of the booth body 10 to accumulate in the spiral chamber 7 and the water tank 2. However, the paint mist that has adhered or adhered thereto can be washed away very easily, so that the volume in the booth main body 10 can always be utilized to the maximum extent possible, and the paint mist is deposited or adhered in the water tank 2. The inconvenience of reducing the amount of circulating water and the resulting reduction in paint mist recovery capacity (because less water circulates reduces the generation of water droplets) can be eliminated in advance (always ensuring sufficient amount of circulating water) There is an advantage that

It is a schematic front view which shows the best embodiment of this invention. FIG. 2 is a right side view, partly in section, of FIG. 1. It is the top view which carried out the partial cross section of FIG. FIG. 2 is a reference diagram showing a state where a part of the water tank part of FIG. 1 is cut away and a water droplet forming plate part is exposed. FIG. 3 is a partially enlarged schematic perspective view showing a spiral chamber portion in FIG. 2. It is explanatory drawing which shows the structure and operation | movement of the spiral chamber part in FIG. FIG. 7A is a diagram illustrating a specific example of the water droplet forming plate in FIG. 6, FIG. 7A is a detailed explanatory view of the water droplet forming plate, FIG. 7B is a right side view of FIG. 7A, and FIG. These are the partial front views seen from the direction of arrow C1 of FIG. 7 (A). FIG. 8A is a diagram illustrating a specific example of the concave guide plate in FIG. 6, FIG. 8A is a detailed explanatory view of the concave guide plate, and FIG. 8B is a partial right side view illustrating a part of FIG. is there. 9A and 9B are diagrams showing a specific example of the partition plate in FIG. 6, FIG. 9A is a cross-sectional view showing the partition plate, FIG. 9B is a partial plan view showing a part of FIG. (C) is the partial front view seen from the arrow C3 direction of FIG. 9 (A). It is explanatory drawing which shows the rotational drive mechanism part disclosed in FIG. It is a schematic block diagram which shows an example of the water circulation system and water supply system which are attached to the booth main body disclosed in FIG. It is a schematic block diagram which shows the other example of the water circulation system and water replenishment system which were disclosed in FIG. It is a schematic block diagram which shows the other example of the spiral chamber part disclosed in FIG. FIG. 14A is a partial front view, and FIG. 14B is a right side view of FIG. 14A, showing a water droplet forming plate portion disclosed in FIG. 13. It is explanatory drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intake / exhaust mechanism 2 Water tank 2K Drain outlet 3 Outside air inlet 4,94 Water drop formation board 4T, 5T, 6T, 94T, 95T, 96T Concavity and convexity 5,95 Concave guide plate 6,96 Partition plate 7,97 Spiral chamber 8 Paint Mist collection mechanism 10 Booth body 10A Front plate 10B, 10C Side plate 15, 17 Support shaft 30 Rotation drive mechanism 31 Interlocking mechanism 33 Lever mechanism as drive means 35 Lever holding mechanism 41 Water tank main body 41F Inner bottom surface 42 of water tank main body 42 Water tank for painting work 50 Drain door S Painting area

Claims (12)

A booth body having an intake / exhaust mechanism at the upper end and a water tank at the lower end and an outside air inlet below the front plate facing the coating region, the front of the outside air inlet of the booth body The face plate portion is equipped with a water droplet forming plate for making fine water droplets in the water tank sucked and moved toward the inside together with the outside air, and the fine water droplets formed by the water droplet forming plate inside the outside air suction port A swirl chamber having an area for adhering spray paint is provided in the swirl chamber, and the fine water droplets using the suction moving force that moves upward when the fine water droplets to which the spray paint adheres are sucked by the intake / exhaust mechanism are provided. In the spray painting booth device, in which the booth body is equipped with a paint mist collection mechanism for collecting the paint together with the spray paint,
The spiral chamber, which has a concave guide plate water of the outside air and the water tank is sucked from the outside air inlet to guide from being sucked moves upward, covering the concave guide plate above the concave guide plate A partition plate projecting from the front plate side toward the direction,
The booth body is equipped with a rotation drive mechanism that rotates the water droplet forming plate forming the outside air inlet and the concave guide plate by a predetermined angle toward the coating region side with the upper end portion as a fulcrum ,
The rotation drive mechanism includes two support shafts that individually hold the water droplet forming plate and the concave guide plate, an interlocking mechanism that is installed between the support shafts and interlocks the support shafts, and the interlocking mechanism. A booth apparatus for spray coating, characterized in that the mechanism is provided with a driving means for biasing the driving force. 2. The spray coating according to claim 1, wherein the driving unit is configured by a lever mechanism, and the lever mechanism is provided with a lever holding mechanism that holds the lever mechanism at a position rotated by a predetermined angle. Booth equipment. 3. The spray painting booth apparatus according to claim 1, wherein the interlocking mechanism sets a rotation angle of the water droplet forming plate to be larger than a rotation angle of the concave guide plate. The interlocking mechanism, in the case of setting the maximum rotation angle of the water droplet formed plate 9 0 °, according to the rotation angle of the concave guide plate in claim 3, characterized in that it has a maximum 50 ° spray painting Booth equipment. A drainage port is provided on the back side of the booth body, and a drainage door that can be opened and closed is provided at the drainage port. The inner bottom surface of the water tank is an inclined surface that is inclined downward from the outside air suction port toward the drainage port. 5. The spray painting booth apparatus according to claim 1, 2, 3 or 4 . The spraying according to claim 5, wherein the drainage door is a negative pressure drainage door that is always opened when the operation of the entire apparatus is stopped and is closed when the inside of the booth body is in a negative pressure state. Paint booth equipment. Convex and concave portions for promoting water droplet formation are continuously provided from one end to the other end at the edge portion of the lower end portion of the water droplet forming plate, and at least every other convex portion of the concave and convex portions is sucked. The spray painting booth device according to any one of claims 1 to 6, wherein the booth device is bent toward the downstream side of the outside air. Convex and concave portions for promoting water droplet formation are continuously provided from one end to the other end on the upper end portion of the concave guide plate and the end edge portion on each protruding side of the partition plate. protrusions that is bent in the opposite direction serial mounting of spray painting booth apparatus in claim 7, characterized in alternately. The spray coating booth device according to claim 7 or 8, wherein the convex portion of the concave and convex portion has a mountain shape. The booth device for spray coating according to claim 7, 8 or 9, wherein a bending angle of each convex portion of the concave-convex portion is set in a range of 0 ° to 90 °. The water droplet forming plate is composed of a fixed plate fixed to the support shaft, and a slide plate that can be reciprocated in a direction away from the support shaft along the fixed plate, and the tip of the slide plate The spray coating booth apparatus according to any one of claims 1 to 6 , wherein a concavo-convex portion is provided in the portion. Each of the concave guide plate and the partition plate is a fixed plate fixed to the support shaft, and a slide plate equipped to be capable of reciprocating along the fixed plate in a direction away from the support shaft or from the front plate. The booth device for spray coating according to any one of claims 1 to 11, wherein the slide plate is provided with a concavo-convex portion at a tip end portion thereof.

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