JPH0822405B2 - Spray paint recovery device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a spray paint recovery device, and in particular, a spray that suitably functions to coat a relatively large number of objects using the same type of paint. The present invention relates to a paint collecting device.

[Conventional technology]

Generally, in a spray coating apparatus using a spray gun, a spray gun for spraying paint on an object to be coated is arranged on one side, and a coating booth is provided on the other side. The spray paint sprayed on the object to be coated forms a coating film on the object to be coated, part of it adheres to the inside of the coating booth, and the rest is diffused outside through the coating booth. It is the current situation.

[Problems to be solved by the invention]

In the above-mentioned conventional example, since the spray paint is diffused to the outside as it is through the exhaust means, there is an inconvenience that if it is left as it is, it will cause pollution. In addition, the amount of paint that adheres to the coating booth is usually the same as or larger than the amount of paint that adheres to the object to be coated, which requires the total consumption of paint. There was a drawback that it was more than the above.

[Object of the Invention]

The present invention improves the disadvantages of such a conventional example, particularly reduces the emission of the spray paint to the outside, and provides a spray paint recovery device that enables efficient recovery and reuse of the spray paint, To that end.

[Means for solving problems]

In the present invention, an endless type paint collecting air filter used by being disposed between the object to be coated and the exhaust means,
A pair of erection rollers that erected and support this paint collecting air filter so as to be rotatable and rotatably mounted, and a erection roller portion located below the pair of erection rollers is immersed in the coating solution. It has a solution tank for storing and supporting it.

The erection roller in the solution tank is provided with a plurality of thin tube members arranged in a cage shape at predetermined intervals around the peripheral portion for receiving the paint collecting air filter, and the thin tube members are supported at both ends thereof. And a housing member to be used. This aims to achieve the above-mentioned object.

[First Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

First, in FIGS. 1 and 2, reference numeral 1 indicates an object to be coated, and reference numeral 2 indicates a spray gun for painting. Also,
Reference numeral 2A indicates a solenoid valve mounted at a relatively distant position.
The article to be coated 2 is hung on a hanger 3A and is transported by the transporting means 3 in a direction orthogonal to the paper surface of FIG.

Reference numeral 4 denotes an exhaust means provided on the opposite side of the above-mentioned coating spray gun. The exhaust means 4 corresponds to the coating booth in the conventional example described above. Also,
4A indicates an opening of the exhaust means 4 on the exhaust side. Then, between the opening 4A and the carry-in / transfer path of the article to be coated 1 described above,
A spray paint recovery device 10 is arranged.

This spray paint collecting device 10 is formed so that it can be moved and installed as shown in FIGS. 1 and 2, and as a whole, an endless type paint collecting air filter 11 and this air filter 11 are provided at two places. Erection rollers 12 and 13 that are rotatably installed and supported, and drive means 14 (see FIG. 2) that rotationally travels the paint collecting air filter 11 through the installation roller 12 disposed above. , A solution tank for accommodating the erection roller 50 (see FIG. 5) arranged below and continuously dissolving and collecting the paint adhering to the paint collecting air filter 11.
18 is provided, and these are supported by the frame body 15.

In the present embodiment, the paint collecting air filter 11 is a mesh-shaped continuous surface body that is flexibly assembled and processed, and is made of a metal member having a relatively fine mesh. For this reason, it has a structure in which the spray paint is easily attached. The paint collecting air filter 11 formed in this way
Of the erection rollers 12 and 50 for rotatably supporting the slab, one erection roller 12 installed on the upper side in FIG. 1 is formed of a metal member in the shape of a hollow drum (see FIG. 2). The weight of the erection roller 12 is reduced. One of the erection rollers 12 is grounded to the frame body 15 at the upper portion with respect to the frame body 15 of FIG. 1, and the other erection roller 50 is installed at the lower portion of the frame body 15.

The drive means 14 described above is connected to one of the erection rollers 12 (see FIG. 2). The driving means 14 is composed of a motor 14A, a reduction gear 14B and a connecting member 14C. Reference numerals 16A and 16B denote bearing portions for rotatably supporting the erection roller 12, respectively. Further, reference numeral 17 indicates a pressing spring.

The solution tank 18 that rotatably accommodates and supports the other erection roller 50 further includes a solution circulation mechanism 19 shown in FIG. 3, a paint removing brush 30 (see FIG. 1), and a concentration detecting means 31 (see FIG. 3). (See) and each are installed side by side. In FIG. 3, reference numerals 19A and 19B indicate pipes for the solution circulation mechanism 19, and reference numerals 20 and 21 indicate open / close valves.

The other erection roller 50 is, as shown in FIGS. 5 to 7, 12 thin tube members 50 arranged in a cylindrical shape and at equal intervals.
It is composed of A, housing members 50B and 50C for fixing and supporting each thin tube member 50A at both ends thereof, and an emotion reinforcing member 50D for reinforcing the central portion of each thin tube member 50A from the inside.

Further, reference numerals 13A and 13B respectively indicate bearing portions for the erection roller 50, and reference numerals 13C and 13D respectively indicate fixing members. Also,
Reference numerals 13E and 13F indicate restraining members.

The solution circulating mechanism 19 prevents the paint from settling by circulating the paint solution in the solution tank 14 in the direction of the arrow A as shown in FIG. 3, and in addition to the pipes 19B and 19A, the foreign matter filtering means 22 And a liquid pump 23 and a solution replenishing unit 24. A drive motor 23A is attached to the liquid pump 23. Solution collecting means 25 is provided between the foreign matter filtering means 22 and the liquid pump 23. This solution take-out 25 is a manual valve 25A, a solution take-out pipe 25B, and a solution take-out tank.
It is composed of 25C and. Therefore, the solution can be arbitrarily taken out by operating the manual valve. The electromagnetic valve 25A may be configured as an electromagnetic valve that is immediately opened by being biased by a control unit (not shown) when the concentration detecting means 31 described later detects a predetermined concentration level.

As shown in FIG. 4, the density detecting means 31 is configured to detect the density by applying a photo coupler. Specifically, it includes a light emitting unit 32, a sensor unit 33, and a light receiving unit 34, and when the output level of the light receiving unit 34 reaches a predetermined value set in advance, an alarm unit 35 that operates based on this and It is composed by. The alarm unit 35 includes a switching transistor 35A, and a buzzer 35B and a blinking lamp 35C which are activated by the conduction of the switching transistor 35A. Reference numeral 36 indicates a signal inverting circuit.

Among these, the light emitting section 32 is configured by a light emitting diode 32A, a condenser lens 32B, and a power source 32C for the light emitting diode. The sensor unit 33 is a light emitting side optical fiber cable 33.
A and a light receiving side optical fiber cable 33B, and a sensor fiber fixing member 33C that is fixed at a predetermined distance (for example, 1.0 [mm]) with the end surfaces of the two facing each other.
The overall structure has the positional relationship shown in FIG. The light receiving section 34 is composed of a phototransistor. Here, the capacitor C is for preventing malfunction due to passage of foreign matter in the solution, and R ₁ and R ₂ are resistors for level adjustment.

In addition, in FIGS. 1 and 2, a mask means for preventing the inflow of air to the substantially entire surface of the frame body 15 except the air passage extending from the spray gun 2 to the opening 4A of the exhaust means 4 is provided.
Equipped with 40. The mask means 40 is made of a soft synthetic resin such as transparent vinyl. Reference numeral 40A indicates an opening provided to face the spray gun 2.

By the operation of the exhaust fan 4B provided in the exhaust means 4, the sprayed paint moves as shown by the arrow B in FIG. Be released to the outside.

A lid 28 is provided on the upper end surface of the solution tank 18 in FIG. 1, whereby vaporization of the solution is effectively suppressed.
The lid 28 is formed with through holes 28A and 28B for allowing the above-mentioned paint collecting air filter 11 to pass therethrough. Furthermore, the through hole 28 on the delivery side of the paint collecting air filter 11 is formed.
A solution removing means 28C formed of a gold-plated brush or the like is attached to B.

Next, the operation of collecting the spray paint in the first embodiment will be described.

First, when the entire apparatus is operated and the coating work of the article to be coated 1 is started, the solution (for example, thinner) in the solution tank 18 becomes
By the action of the solution circulation mechanism 19 described above, the solution slowly moves from the left side to the right side in FIG. Support roller 13 at the same time
And the movement of the paint collecting air filter 11 associated therewith causes the solution to be effectively and constantly stirred as a whole without waiting for the dissolved paint to settle.

On the other hand, since the spray paint is sucked and moved in the direction B in FIG. 1 as the exhaust means 4 operates as described above, almost the entire amount of the spray paint passes through the paint collecting air filter 11 doubly. For this reason, the spray paint is effectively attached to the paint collecting air filter 11, whereby the emission to the outside is significantly reduced.

The paint attached to the paint collecting air filter 11 is efficiently dissolved in the solution in the solution tank 18. Therefore, the paint collecting air filter 11 continuously collects the spray paint at the air filter portion where the paint hardly adheres.

Then, as soon as the amount of paint in the solution increases and the transparency falls below a certain level, the concentration detecting means 31 shown in FIG. 4 is activated immediately to inform the operator that the solution has reached a predetermined concentration. Then, the operator takes out the solution in the solution tank 18 from the solution extracting means 25 to the outside. During this time, the operation of the liquid pump 23 is stopped. Then, when the work of taking out the solution is completed, a new coating solution is replenished from the solution replenishing section 24 by an operator or the like.

Since the solution taken out is in a state in which a certain amount of paint is dissolved, a small amount of paint can be added to this solution and reused as it is as a paint liquid for spray paint.

Therefore, it is possible to drastically reduce the consumption of paint as a whole, to reduce the emission of spray paint to the outside, and to eliminate the conventional inconvenience of incineration of paint adhered in the paint booth. Has the advantage that

Further, in this embodiment, since the erection roller 50 in the solution tank 18 is configured as shown in FIG. 5, the paint collecting air filter 11 passing through the solution tank 18 has the adhered paint from both surfaces in the solution. It has the advantage that it will be dissolved and therefore the deposited paint can be dissolved quickly and more completely and recovered in the liquid.

Further, the erection roller 12 located above is formed of a metal member and is grounded, so that the paint collecting air filter 11 is also always grounded. On the other hand, the sprayed paint released into the air is charged with floating charges floating in the air, and thus has a slight charge. Therefore, the spray paint is efficiently attached to the paint collecting air filter 11. In a repeated experiment using one paint collecting air filter, an average increase of about 4.5% (weight increase) without grounding could be obtained. Therefore, if this is used for electrostatic coating,
It is possible to sufficiently adhere and collect the coating material more than double the amount, and it is possible to remarkably reduce the coating material components released to the outside.

[Second Embodiment] Next, a second embodiment will be described with reference to FIGS. 8 to 9.

8 to 9, the erection roller 60 in the solution tank 18 has a thin tube member 60A equivalent to the twelve thin tube members in the first embodiment described above, and a hollow drum type roller body 60B as shown in the drawing. It is fixedly attached to the outer periphery of. Other configurations are the same as those in the first embodiment described above.

By doing so, since the thinner and the like do not enter the inside of the roller body 60B, it is possible to obtain the same function and effect as the case of the first embodiment with less solution than the case of the first embodiment described above. .

[Third Embodiment] Next, a third embodiment will be described with reference to FIGS.

In the third embodiment, instead of the support roller 60 in the solution tank 18 in the second embodiment described above, a guide roller composed of a plurality of thin tube members having a relatively small diameter and protruding downward and sequentially arranged in a semicircular shape. 70A is equipped, and the solution storage portion of the solution tank 18 has a U-shaped cross section along the guide rollers 70A as a whole, and each guide roller 70A has a lid 28 together with its supporting plates 70B and 70C. It has a structural feature in that it is attached to the. The other configuration is the above-mentioned third.
It is equivalent to the example.

By doing so, in addition to the effects substantially the same as those of the second embodiment described above, there is an advantage that the amount of the solution used can be further reduced and the maintenance can be further facilitated.

Further, in each of the above embodiments, the case where the fixed solution tank 18 is used is illustrated, but as shown in FIG. 12, the height adjusting means 80, 81 may be provided on the foot portion. Furthermore, since the paint in the solution may adhere to the light transmitting / receiving surface of the sensor fiber fixing member 33C, a thin wire brush or the like as the foreign matter removing means 82 is supported as shown in FIG. 13 in order to always remove it. It may be fixed to the roller 13.

On the other hand, in each of the embodiments described above, only the case where the endless belt type paint collecting air filter 11 is simply installed in the vertical direction has been illustrated, but the present invention is not necessarily limited to this. For example, the paint collecting air filter 11 may be installed as shown in FIG. 14 according to the purpose of use, and the adhered paint may be collected from above. Further, as shown in FIG. 15, the adhered paint may be collected at two upper and lower places. Further, when collecting the dripping paint or the like on a horizontal surface, the paint collecting air filter 11 may be configured to run horizontally as shown in FIG. Further, as shown in FIG. 17, if necessary, a means 85 for applying a solution to the paint collecting air filter portion immediately before the paint is attached may be provided.

In each of the above-mentioned embodiments, the paint collecting air filter 11 formed of a conductive member is exemplified, but the conductive member is not always necessary. Also, the solution tank
As a method of measuring the solubility of the coating material in the solution in 18, especially when using light was illustrated, the present invention is not necessarily limited to this, for example the concentration using a viscosity measuring means capable of continuously measuring the change in viscosity. The measurement may be performed and a predetermined signal may be constantly output.

Further, in each of the above-mentioned embodiments, the case where the spray gun 2 is fixed has been exemplified, but the present invention is not necessarily limited to this, and for example, a vertical movement of the spray gun performed during electrostatic coating, or a spray gun. Even if it is a portable paint that is manually operated by the gun, it is applied as it is.

〔The invention's effect〕

Since the present invention is configured and functions as described above, according to this, it is possible to continuously and effectively recover and use the spray paint that is sprayed in the air without adhering to the object to be coated, and to the outside. Not only can the emission of the spray paint of 1) be significantly reduced, but also the overall consumption of the paint can be significantly reduced. Furthermore, since the erection roller is formed into a cage shape with multiple thin tube members, The spray paint that has adhered to the recovery air filter can be dissolved and removed from both sides of the paint recovery air filter in the solution tank. Therefore, the paint recovery air filter is always in a good ventilation state without clogging. Therefore, it is possible to provide an excellent spray paint recovery device, which is not available in the past, in which the spray paint can be more effectively and quickly recovered.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of the present invention, FIG. 2 is a partially sectional front view showing a spray paint collecting device portion of FIG. 1, and FIG. 3 is an embodiment of FIG. FIG. 4 is a configuration diagram showing an example of a solution circulation mechanism provided, FIG. 4 is a circuit diagram showing an example of concentration detecting means provided in the embodiment of FIG. 1, and FIG. 5 is a solution tank portion in FIG. FIG. 6 is a detailed sectional view showing FIG.
Sectional drawing which shows the erection roller part seen along the VII-VII line of the figure, FIG. 7 is a right side view which shows the erection roller of FIG.
FIG. 9 is a sectional view showing a solution tank portion in the second embodiment,
8 is a sectional view showing the erection roller portion taken along the line XX in FIG. 8, FIG. 10 is a longitudinal sectional view showing the third embodiment, and FIG. 11 is a sectional view showing the solution tank portion in FIG. Explanatory view partially sectioned, No. 12
FIGS. 13 to 13 are explanatory views showing the auxiliary equipment of FIGS. 1 to 11, respectively, and FIGS. 14 to 17 are explanatory views showing an example of another facility method of the paint collecting air filter. 1 ... Painted object, 4 ... Exhaust means, 11 ... Paint recovery air filter, 12,50,60 ... Erection roller, 14 ... Driving means, 18 ... Solution tank, 50A, 60A ... Thin tube Member, 70A ... A guide roller made of a thin tube member.

Claims (1)

[Claims] 1. An endless type paint collecting air filter which is disposed between an object to be coated and an exhaust means, and a pair of the paint collecting air filter which is rotatably mounted and supported. A erection roller and a solution tank that rotatably accommodates and supports the erection roller portion located below the pair of erection rollers in a state of being immersed in the coating solution, and the erection roller in the solution tank is A plurality of thin tube members arranged in a cage shape at predetermined intervals in a peripheral portion for receiving the paint collecting air filter, and a housing member supporting the thin tube members at both ends thereof. A spray paint recovery device characterized in that