JP4629361B2 - Spray painting booth equipment - Google Patents

Description

  The present invention relates to a spray painting booth apparatus, and more particularly, to a spray painting booth apparatus in which unnecessary spray paint diffused into the air during spray painting is sucked together with outside air and attached to water droplets to be collected.

A conventional example is shown in FIG. 12 (Non-Patent Document 1).
The conventional example shown in FIG. 12 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 sucking and collecting spray paint (mist-like paint mist) that passes around the object to be coated 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 up 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 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 equipped to face 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, the 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.

  An upper opening 107 </ b> A for sending water droplets upward is set between the tip of the partition plate 106 and the upper edge of the concave guide plate 105 in FIG. 12. For this reason, the water droplets sucked by the intake / exhaust mechanism 101 installed above and having the spray paint adhered 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 each of 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. The intake / exhaust mechanism 101 is configured to easily suck water droplets from the inside of the spiral chamber 107 upward together with other air sucked simultaneously from the upper opening 107A.

  The 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 opposite to the traveling direction, It collides with the corresponding part of the back plate 100D or the front plate 100A and adheres together with the spray paint, and since it is made continuously, the attached water droplet grows into a large water droplet and eventually drops together with the spray paint in the lower water tank. To do.

That is, the paint mist collecting mechanism 108 continuously receives the water droplets to which the spray paint adheres and grows them into large water droplets, 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 of the water to drop into water drops.
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, the removal work of the paint mist accumulated in the water tank has conventionally 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.
Also, since the water in the aquarium is repeatedly used as water for forming water droplets, once the coating mist accumulates in the aquarium, the recovered coating mist is once mixed in the water in the aquarium. The inconvenience that the recovery efficiency with respect to the paint mist taken in with external air falls often occurred. Furthermore, when the coating mist is accumulated in the water tank, there is a problem that the working environment is deteriorated by filling the working place with a bad odor.

Therefore, in the present invention, the disadvantages of the conventional example are improved, and the paint mist is discharged to an external water storage tank or the like at a predetermined timing before the coating mist is deposited in the water tank of the booth body. more and improvement conger, to provide the spray painting booth apparatus as paint mist deposited were once collected in water for water droplet formation is effectively eliminated from entering, and an object.

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. A water droplet forming means is provided inside the above-described outside air inlet of the booth main body for forming water droplets in the water tank that is sucked together with the outside air from the outside air inlet. The water droplet forming means is arranged in a region where the spray paint sucked into the inside together with the outside air from the outside air inlet is sucked upward together with the outside air.
Above the water droplet forming means (in the central part of the booth main body), a paint that collects the water droplets by using a suction moving force in which the water droplets to which the spray paint is attached are sucked by the intake / exhaust mechanism described above and move upward Equipped with a mist recovery mechanism.
A drain outlet is provided in the water tank part below the booth body described above, and an openable / closable drain door is provided at the drain outlet. And the inner bottom face of the water tank mentioned above was made into the inclined surface which inclined below toward the drain outlet from the external air inlet mentioned above.
Further, the drain door includes a door main body, a door holding arm that holds the door main body in a suspended manner, and a spring member that is provided on the door holding arm portion and constantly biases the door main body in a direction to open the drain outlet. It is characterized by comprising (Claim 1).

  For this reason, in the present invention, the water in the water tank sucked together with the outside air is first made into water droplets by the water droplet forming means, and at the same time, most of the spray paint sucked together with the outside air adheres to the water droplets. It is sequentially transferred upward by the suction force of the exhaust mechanism. In addition, a paint mist collecting mechanism for collecting water droplets being transferred upward together with the spray paint is provided at the center of the booth body. In this case, in the paint mist collecting mechanism, water droplets are sequentially and continuously collided with a plate-like member (which may be a net-like member or a member having a plurality of rod-like members laid), whereby water droplets grow and drop into the water tank. As a result, spray paint (paint mist) is collected together with the water droplets.

  In addition, a drainage port is provided in the water tank part below the booth body, and a drainage door that can be opened and closed is provided in the drainage port. Further, the bottom surface of the water tank described above is inclined downward from the outside air suction port toward the drainage port. Because it is a surface, drainage during cleaning in the aquarium can be efficiently performed, and the paint mist is continuously discharged in one direction along with the cleaning water, greatly improving the work efficiency during cleaning. Is convenient.

Further, the drain door described above may be a negative pressure operated drain door that is always opened when the entire apparatus is stopped and is closed when the inside of the booth body is in a negative pressure state (Claim 2).
In this way, the suction / exhaust mechanism stops as the painting operation stops, so the inside of the booth body is released from the negative pressure state, which opens the negative pressure operated drainage door, and the water in the tank is automatically Discharged. For this reason, paint mist does not accumulate in the aquarium, and not only in this point, the cleaning operation is speeded up, but fresh water for collecting spray paint is always supplied to the aquarium at the start of the operation. The ability to collect spray paint (paint mist) can be greatly improved, and the amount of unnecessary spray paint released to the external space can be greatly reduced, which is very convenient for environmental hygiene.

Here, For a drainage door described above, may be provided which on the rear plate side of the booth body (claim 3).

  Since the present invention is configured and functions as described above, according to this, the amount of paint mist deposited in the tank in the booth body can be greatly reduced, while the water in the tank is always replenished with fresh water. In this respect, the ability to collect spray paint (paint mist) can be maintained in a good condition over a long period of time, which reduces the amount of paint mist released to the outside and reduces the environment to the outside. It is possible to provide an unprecedented excellent spray painting booth apparatus capable of effectively suppressing the contamination and extremely reducing the generation of bad odors in the factory.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings.

[Overall contents]
1 to 3, 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. 1). 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 the both side surfaces (upper portions in FIG. 1 of the rotation drive mechanism 30 described later).
In FIG. 2, a symbol T indicates a coating jig for holding the workpiece W in a rotatable manner. 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). The outside air inlet 3 is provided in the lower part of the front plate 10A provided facing the space S).
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. 1, 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. And as shown in FIG. 1, the external air inlet 3 is provided between the water droplet formation board 4 arrange | positioned under this front plate 10A part, and the bottom face in the water tank 2 mentioned above. In this case, the water droplet forming plate 4 described above includes a continuous uneven portion 4T (see FIG. 4) for forming water droplets at the lower end edge portion as described later.

  When the entire apparatus is in operation, as shown in FIG. 1, initially, the lower end edge of the water droplet forming plate 4 is disposed in the water tank 2 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 (water droplet forming means) 7.
A concave guide plate 5 is provided on the inner side of the water droplet forming plate 4 described above so as to face the water droplet forming plate 4 and be spaced at a predetermined interval. 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. 1 through the outside air inlet 3 and the spray paint m and the water in the water tank 2 try 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 main body 10 form the above-described spiral chamber (water droplet forming means) 7 (see FIG. 1). ).

In the spiral chamber 7 as the water droplet forming means, as described above, the 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. Since it is directed downward and is continuously performed, air swirls are generated in the swirl chamber 7 and adhesion of spray paint to water droplets is promoted.
Between the right edge of the partition plate 6 in FIG. 1 and the upper edge of the concave guide plate 5 in FIG. 1, an upper opening 7A for sending water droplets upward is provided. 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 the water droplets to which the spray paint adheres into large water droplets, and thereby effectively collects the spray paint in the lower water tank 2 as the 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, some of the 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 has become.

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 swirl chamber (water droplet forming means) 7 and is disposed below the lower end portion (the front end portion of the water droplet forming plate 4) of FIG. An uneven portion 4T having a mountain shape continuous toward the surface is provided (in a sawtooth shape) (see FIGS. 4 to 6). 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 6, 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. 4 to 6, the upper end edge 4 </ b> A portion of the water droplet forming plate 4 has a longitudinal cross section projecting outwardly into a semicircular arc shape and is 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. 6, first, each apex angle α1 (see FIG. 6C) is processed to about 90 ° (the trough angle α2 is also processed to about 90 °). Thereafter, the uneven portions 4T are processed and set in a state of being bent at a predetermined angle β1 (see FIG. 6A) in the opposite direction alternately. Here, FIG. 6C shows the concavo-convex portion 4T viewed along the arrow C1 in FIG.

In FIG. 6A, 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 angle .beta.2 bent between the adjacent convex portions 4t is bent in the opposite direction with an inclination of about 60.degree. As a whole. 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. Water droplets are effectively promoted.
Here, the bending angle β1 in FIG. 6A described above is not necessarily 30 ° as long as it is in the range of 0 ° to 90 °. In this case, the bent angle β2 between the adjacent convex portions 4t may not necessarily be 60 ° as long as it is in the range of 0 ° to 90 ° as a whole.

  4 and 6, an arrow K1 indicates the rotation direction of the water droplet forming plate 4 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. 4). 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]
As described above, the spiral chamber 7 as the water droplet forming means includes the both 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 so as to face the same. The space surrounded by the partition plate 6 provided above the water droplet forming plate 4 is configured.

First, the concave guide plate 5 will be described in detail.
As shown in FIG. 7, the concave guide plate 5 has an overall concave angle Q of, for example, 65 ° to 90 ° in the guide plate body 5 </ b> A in this embodiment, and the lower end tip 5 </ b> B (FIG. 7). (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. 1). 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 to be replenished, and circulated and replenished for water drops. It has become.

  As shown in FIGS. 4 and 7, 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 formed 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. 7A (the portion arranged to bend 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, at the time of actual operation, the uneven portion 5T functions in the same manner as the uneven portion 4T of the water droplet forming plate 4 described above, and utilizes the force that the water droplets formed by the water droplet forming plate 4 rapidly suck and move upward. Thus, the 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 machining, first, the apex angle α1 (see FIG. 7B) of each convex portion 5t is set to about 90 ° as in the case of the conventional example described above (the angle α2 of the valley portion is also set to about 90). After that, the convex portions 5t are alternately set in a state of being bent at a predetermined angle β1 (see FIG. 7A) in the opposite direction.

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 is not 30 ° if it is in the range of 0 ° to 90 °). May be good). For this reason, the bent angle β2 between the adjacent convex portions 5t is generally bent in the opposite direction with an inclination of about 60 ° (where β2 is 0 ° to 0 °). If it is in the range of 180 °, it may not be 60 °).
As a result, when the 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 intense. Thus, the local fluctuation of the negative pressure is activated, thereby further promoting the formation of water droplets, and at the same time, the spray paint (paint mist) m flowing together is more likely to adhere to the water droplets. .

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. 7 (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. 4 and 8A, 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 down a part of water droplets rising from below and suctioned outside air. 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, the partition plate 6 has a leading end portion (right end edge portion in FIG. 8A) that is the same as the mountain-shaped uneven portion 4T formed on the water droplet forming plate 4 in FIG. 6 described above. 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, when a part of the water droplet in the swirl chamber 7 rapidly moves (sucks out) upward from the swirl chamber 7, it strikes the concave and convex portion 6 T, and therefore the fluctuation of the negative pressure in this portion. However, the water droplets are crushed or disturbed more finely (by the concavo-convex 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 water droplets at the uneven portion 6T further increases, and the spray paint is more effectively adhered.
Here, when machining each convex portion 6t, first, the apex angle α1 (see FIG. 8C) 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 machined to about 90 °), and thereafter, each of the convex portions 6t is alternately set in a state bent at a predetermined angle β1 (see FIG. 8A) in the opposite direction. Yes. FIG. 8C shows the uneven portion 6T when the uneven portion 6T disclosed in FIG. 8A 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 is not 30 ° if it is in the range of 0 ° to 90 °). May be). 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 is 0 ° to 180 °). If it is within the range, it may not be 60 °).
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. The spray paint (paint mist) m flowing together is more likely to adhere to the water droplets.

  As described above, in the swirl chamber 7, the water droplets sucked through the outside air suction port 3 and formed in the water droplet forming plate 4 are swirled together with the outside air and the spray paint m to be sucked at the same time. Some of them adhere to the surrounding members together with water droplets, but many adhere effectively to the water droplets that move together in the space. Further, when the water droplet is sent upward from the spiral chamber 7, the water droplet is further subdivided by the uneven portion 6T of the partition plate 6 and the uneven portion 5T of the concave guide plate 5, and accordingly. The spray paint m is sent upward from the spiral chamber 7 while more effectively adhering to the water droplets. That is, even in the process of being transferred upward from the spiral chamber 7, the adhesion of the spray paint m to the water droplets is further effectively promoted as described above.

[Overall functions of the spiral chamber]
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. 5).

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 in the water tank and the outside air 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. 5). 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 above the concave guide plate 5 (see arrows e and f in FIG. 5). 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. After that, 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 water droplets. The fine water droplets continuously move upward from the upper opening 7A together with the spray paint.
That is, a part of the water droplets to which the spray paint m is applied in the swirl chamber 7 is sucked into the intake / exhaust mechanism 1 provided 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.

[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 3 and 9).

  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. 1 and 3 to 5, the support shafts 15 and 17 are arranged 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 above-mentioned interlocking mechanism 31 is installed below the left end of the front view shown in FIG. 2, 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 body 10 (see FIG. 2), 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 is rotated 90 ° from the suspended state, the concave guide plate 5 is rotated about 50 °, and when viewed from the front side of the booth body 10 (FIG. 2), a water droplet is observed. 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. 2 to 3 and 9, the lever mechanism 33 as the driving means is disposed on the support shaft 17 (support shaft that supports the concave guide plate 5) of the larger chain wheel 31 </ b> 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. 9, symbol G1 indicates the operation range of the operating 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 sizes and ratios (differences 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. 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 which the right side part of the water tank main-body part 41 protruded in the front in the area | region of the right side part 2/3 of the front of FIG. 2 (refer FIG. 3). The inner bottom surface of the painting work water tank section 42 is set to be horizontal. As shown in FIG. 2, 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 painting work water tank section 42. . 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. 1: 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 compression spring 53 described above functions to constantly press the door body 51 to the position indicated by the dotted line in FIG. 1, 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. 1, thereby opening the drain port 2K, 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. 1, the water circulation system 60 is configured to return the water remaining on the drain door 50 side in the water tank 2 to the outside region of the 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. 1, 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 piping unit 62 is equipped as shown in FIG. 1 is illustrated, but the water storage unit 63 is expanded to the right in FIG. 1 (to the region of the circulation piping unit 62). Then, the circulation piping part 62 is deleted, and the 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. 1 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. 11 utilizes natural convection associated with a change in the water level in the aquarium 2, and the entire apparatus is activated and the water in the aquarium 2 together with the outside air from the outside air inlet 3 is the swirl chamber described above. 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. Since the water collected in the booth body 10 is then returned to the water tank 2 in sequence, the 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. 11, symbols a and b indicate the intake direction of the outside air sucked from the outside air suction port 3 and the water 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. 11 not only has substantially the same function as the water circulation system disclosed in FIG. 1 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. 11 is additionally provided with a switching valve 81 in the replenishment pipe 72 in the water replenishment system 70 in FIG. 1 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. 1 described above.
In this way, in addition to having the same function as the water replenishing system 70 in FIG. 1 described above, the switching valve 81 is switched as necessary to feed the replenishing water into the painting 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. 5).

  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. 5). . During this time, part of the spray paint adheres to the water droplets.

  A part of the water and the outside air sent out obliquely upward is sucked into the booth main body 10 together with the spray paint m above the concave guide plate 5 (see arrow d in FIG. 5). 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 suction port 3 portion, the dropped water droplets are integrated with the spray paint m and the outside air in the uneven portion 4T of the outside air suction port 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 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, the occurrence of turbulent flow in this part increases, and at the same time, the repeated fluctuation of the negative pressure occurs, so Chemicalization proceeds 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. , Water droplet formation proceeds at a stretch. Therefore, the spray paint that is sucked upward and moves at the same time is agitated with a large amount of water droplets generated in the region exiting the swirl chamber 7 and with a large amount of water droplets in a repetitive fluctuation of negative pressure. A large amount adheres.

  Then, the water droplets to which the spray paint m adheres in the spiral chamber 7 and the upper opening 7A described above successively collide with the sloped partition plates 11 and 12 of the paint mist collecting mechanism 8 installed above and again paint mist. It grows large as water droplets containing water, and then is 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. The coating mist that adheres or adheres can be washed out very easily along the inclined floor surface 41F in the aquarium 2, thereby making it possible to always make the most effective use of the volume in the booth body 10. Eliminate in advance the inconvenience that the amount of water that mist accumulates in or adheres to the water tank 2 and circulates and the resulting recovery ability of the paint mist decreases (because the amount of water that circulates is small, the generation of water droplets decreases). There is an advantage that it can be obtained (the amount of circulating water can always be sufficiently secured).

Here, although the case where the rotation drive mechanism 30 was equipped was illustrated in the said embodiment, this invention made the water drop formation board 4 and the concave guide plate 5 fixed type, without equip | installing the rotation drive mechanism 30. FIG. Even if it is a thing, it is applied as it is and functions in the same way as the case of the above-mentioned embodiment when removing the paint mist adhering to or accumulating in the water tank 2.
Moreover, in the said embodiment, although the swirl | vortex chamber 7 was illustrated as a water droplet formation means, this invention should just be the thing which can be made into the water droplet, Comprising: A water droplet formation means is necessarily limited to the swirl chamber 7. is not.

It is the side view which carried out the partial cross section which shows the best embodiment of this invention. It is the schematic front view seen from the left side of FIG. It is the top view which carried out the partial cross section of FIG. FIG. 2 is a partially enlarged schematic perspective view showing a spiral chamber portion in FIG. 1. It is explanatory drawing which shows the structure and operation | movement of the spiral chamber part in FIG. FIG. 6A is a diagram illustrating a specific example of the water droplet forming plate in FIG. 5, FIG. 6A is a detailed explanatory diagram of the water droplet forming plate, FIG. 6B is a right side view of FIG. 6A, and FIG. These are the partial front views seen from the direction of arrow C1 of Drawing 6 (A). FIG. 7A is a diagram illustrating a specific example of the concave guide plate in FIG. 5, FIG. 7A is a detailed explanatory view of the concave guide plate, and FIG. 7B is a partial right side view illustrating a part of FIG. is there. 8 is a diagram showing a specific example of the partition plate in FIG. 5, FIG. 8 (A) is a cross-sectional view showing the partition plate, FIG. 8 (B) is a partial plan view showing a part of FIG. 8 (A), FIG. (C) is the partial front view seen from the arrow C3 direction of FIG. 8 (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 explanatory drawing which shows a prior art example.

Explanation of symbols

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

Claims (3)

It has a booth body equipped with an intake / exhaust mechanism at the upper end, a water tank at the lower end, and an outside air inlet below the front plate facing the painting area, and inside the outside air inlet of the booth body Equipped with water droplet forming means for forming water droplets in the water tank that is sucked in from the outside air inlet to the inside together with outside air, and spray paint sucked into the inside together with outside air from the outside air inlet is sucked upward together with outside air The water droplet forming means is disposed in a region where the water droplets are formed, and the water droplets to which the spray paint is attached are attracted by the suction / exhaust mechanism and moved upward using the suction moving force. In the booth device for spray coating, in which the booth body is equipped with a paint mist recovery mechanism to recover,
A drainage port is provided in the water tank part below the booth body and a drainage door that can be opened and closed is provided in the drainage port.
The inner bottom surface of the water tank is an inclined surface inclined downward from the outside air intake port toward the drain port,
The drain door includes a door main body, a door holding arm that holds the door main body in a suspended manner, and a spring member that is provided on the door holding arm portion and constantly biases the door main body in a direction to open the drain outlet. paint booth apparatus spraying was characterized by comprising.   2. The spray coating according to claim 1, wherein the drain door is a negative pressure drain 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. Booth equipment.   3. The spray painting booth apparatus according to claim 1, wherein the drainage door is provided on a back plate side of the booth body.

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