JP6900616B2 - painting booth - Google Patents

Description

The present invention relates to a painting booth.

Patent Document 1 discloses a painting facility provided with an unmanned automatic painting room for painting with a one-handed robot having a painting gun in the center and manned painting rooms located on both sides of the automatic painting room.

Then, in the painting equipment of Patent Document 1, a part of the exhaust of the automatic painting room is returned to the automatic painting room and circulated, and a part of the air supplied to the manned painting room is made to flow into the automatic painting room. In addition to providing necessary ventilation to maintain indoor conditions such as keeping the paint solvent concentration in the automatic painting room below the explosion limit, maintaining the air supply / exhaust balance in the automatic painting room, and inflow from the manned painting room. By supplying ventilation air to the automatic painting room, the deterioration of the working environment in the manned painting room from the automatic painting room is surely prevented.

Japanese Unexamined Patent Publication No. 05-76725

By the way, the running cost of the painting booth occupies a large weight in the painting factory, and it is possible to significantly reduce the running cost of the painting factory by reducing the running cost of the painting booth.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a painting booth capable of reducing running costs.

The present invention is grasped by the following configuration in order to achieve the above object.
(1) The painting booth of the present invention is connected to a painting room in which a painting machine for painting an object to be coated is arranged and a coating room in which entry is prohibited during painting, and the object to be coated is arranged at the time of painting. An exhaust chamber having an intake port for taking in the gas of the coating chamber on the side facing the coating machine with a position thereof, a first filter portion provided on the intake port side of the exhaust chamber, and the coating. An opening provided in the chamber and connected to the outside of the painting booth, an exhaust portion for exhausting a part of the gas in the exhaust chamber to the outside, a first gas supply portion for supplying new gas to the coating chamber, and the above. Gas is taken in through the second filter part provided on the opposite side of the painting chamber with the first filter part sandwiched between the first filter part and the second filter part, and the taken-in gas is supplied to the painting room. It is provided with a second gas supply unit.

(2) In the configuration of (1) above, the total amount of gas supplied from the first gas supply unit and the second gas supply unit to the coating chamber is the first pressure in the coating chamber and the outside of the opening. It is set to the total amount that balances the second pressure of.

(3) In the configuration of (1) or (2) above, the total amount of gas taken into the second gas supply unit and the exhaust unit is such that the controlled wind speed in the coating chamber is less than 0.4 m / sec. It is set.

(4) In any one of the above (1) to (3), the second filter unit is provided on the outer peripheral side of the first filter unit.

(5) In any one of the above (1) to (4), the opening is provided on the side surface of the coating chamber facing the exhaust chamber, and the second gas supply portion is the said. A pair of second gas supply ports that are provided on both sides of the opening and supply the gas to the coating chamber are provided, and the gas supplied to the coating chamber is coated on the second gas supply ports. A second wind direction adjusting unit facing the machine side is provided.

(6) In any one of the above (1) to (5), the first gas supply unit is provided on the ceiling on the opening side of the coating chamber and supplies gas to the coating chamber. 1 Equipped with a gas supply port.

According to the present invention, it is possible to provide a painting booth capable of reducing running costs.

It is a perspective view of the painting booth of the embodiment which concerns on this invention. It is a front view which looked at the painting booth of the embodiment which concerns on this invention from the X direction of FIG. It is a side view which looked at the painting booth of the embodiment which concerns on this invention from the Y direction of FIG. It is a back view which looked at the painting booth of the embodiment which concerns on this invention from the Z direction of FIG. It is sectional drawing of the painting booth along the line AA of FIG. It is sectional drawing of the painting booth along the line BB of FIG. It is sectional drawing of the painting booth along the line CC of FIG.

Hereinafter, embodiments for carrying out the present invention (hereinafter, embodiments) will be described in detail with reference to the accompanying drawings.
The same elements are numbered the same throughout the description of the embodiments.

1 is a perspective view of the painting booth 1 according to the embodiment of the present invention, FIG. 2 is a front view of the painting booth 1 as viewed from the X direction of FIG. 1, and FIG. 3 is a Y of the painting booth 1 of FIG. It is a side view seen from the direction, and FIG. 4 is a rear view of the painting booth 1 seen from the Z direction of FIG.
5 is a cross-sectional view of the painting booth 1 along the line AA of FIG. 2, FIG. 6 is a cross-sectional view of the painting booth 1 along the line BB of FIG. 3, and FIG. 7 is a diagram. It is sectional drawing of the painting booth 1 along the CC line of 3.

As shown in FIGS. 1, 5 and 7, the painting booth 1 has a painting chamber 10 in which entry is prohibited during painting and a painting machine 11 (see FIG. 7) for painting the object to be painted 15 is arranged. , An exhaust chamber that is connected to the coating chamber 10 and has an intake port 21 that takes in the gas of the coating chamber 10 on the side facing the coating machine 11 with the position 12 (see FIG. 7) on which the object to be coated 15 is arranged at the time of coating is arranged. 20 and.
In the present embodiment, the coating machine 11 is a robot-type coating machine 11 in which an automatic coating gun is attached to a robot arm and a predetermined coating is performed on an object to be coated 15 according to a coating program. It may be a painting machine of.

Further, as shown in FIGS. 5 and 7, the painting booth 1 is opposite to the painting chamber 10 with the first filter section 30 sandwiched between the first filter section 30 provided on the intake port 21 side of the exhaust chamber 20. A second filter unit 40 provided on the side is provided.

Further, as shown in FIG. 1, the painting booth 1 is provided in the painting chamber 10, and has an opening 13 connected to the outside of the painting booth 1 (inside the room where the painting booth 1 is installed) and a gas in the exhaust chamber 20 (for example,). , Air) to the outside (outside the building), a first gas supply unit 23 that supplies new gas (for example, air) to the painting chamber 10, and a second filter unit 40. A second gas supply unit 24 that takes in the gas (for example, air) of the exhaust chamber 20 and supplies the taken-in gas to the coating chamber 10 is provided.

(Opening 13)
The opening 13 is an opening used when the object to be coated 15 is taken in and out of the coating chamber 10.
Specifically, as shown in FIG. 7, a rail 14 is provided on the floor surface of the painting chamber 10 so as to surround the periphery of the painting machine 11, and the rail 14 moves on the rail 14 to be coated. A transport unit 16 for transporting the object 15 is provided.
Then, the object to be coated 15 arranged on the conveying portion 16 is conveyed by the conveying portion 16 between the opening 13 and the position 12 where the object to be coated 15 is arranged at the time of painting.

Therefore, the object to be coated 15 having been painted on the transport section 16 can be taken out from the coating chamber 10 through the opening 13, and the next object to be coated 15 can be arranged on the transport section 16 through the opening 13. Therefore, the object to be coated 15 can be taken in and out from the painting room 10 without entering the painting room 10 which is prohibited from entering during painting.

(1st filter unit 30)
The first filter unit 30 includes a primary filter 31 (in this example, a roll filter made of a non-woven fabric or paper having a roughness that allows gas to pass through) arranged closest to the coating chamber 10, and a paint that cannot be supplemented by the primary filter 31. Secondary filter 32 (in this example, a baffle plate made of non-woven fabric or paper having a labyrinth structure (zigzak structure) through which the gas passes) and a tertiary filter that supplements the paint that has passed through the secondary filter 32. A filter 33 (in this example, a fiber plate such as a glass fiber having a roughness that allows gas to pass through) is provided, and the gas is contained in the gas to a level at which the gas of the exhaust chamber 20 can be discharged to the outside of the building from the exhaust unit 22 described later. Reduces the content of the paint used.

When the primary filter 31 arranged closest to the coating chamber 10 side is a roll filter as in the present embodiment, a new portion of the roll filter is sent out according to the amount of paint adhered, and the portion to which the paint adheres is wound up. Therefore, it is possible to prevent the gas flow from being impaired due to clogging.
Further, since it is possible to prevent a decrease in the ability of the primary filter 31 to capture the paint, it is possible to lengthen the time until the secondary filter 32 and the tertiary filter 33 are replaced.

(2nd filter unit 40)
The second filter unit 40 sandwiches the pre-filter 41 (in this example, a fiber plate having a roughness such as glass fiber through which gas can pass) provided on the side of the first filter unit 30 and the pre-filter 41. It includes a medium-performance filter 42 located on the opposite side of the 30 and a second gas intake unit 43 having a second gas intake port 43a that opens on the first filter unit 30 side.

The second gas intake unit 43 has a housing having an opening (second gas intake port 43a) on the first filter unit 30 side, and is taken in via the pre-filter 41 and the medium-performance filter 42. It serves to guide the gas to the second gas supply unit 24, which will be described later.

The pre-filter 41 and the medium-performance filter 42 have a second gas intake unit 43 so as to close the second gas intake port 43a, which is an opening provided on the first filter unit 30 side of the second gas intake unit 43. The content of the paint and the like contained in the gas is reduced to a level that can be circulated in the coating chamber 10 by these filters, and the gas is circulated in the coating chamber 10. A gas having a reduced content of paint or the like to a level that can be taken in is taken into the second gas intake unit 43.

That is, the second gas supply unit 24, which will be described later, reduces the content of the paint or the like contained in the gas to a level that can be circulated to the coating chamber 10 via the first filter unit 30 and the second filter unit 40. The gas is taken in and circulated in the painting chamber 10.

FIG. 4 is a perspective view of the side wall on the rear side of the exhaust chamber 20 so that the second filter unit 40 can be seen. As shown in FIG. 4, the second filter unit 40 is the outer periphery of the first filter unit 30. It is provided along the side.

More specifically, the second filter portion 40 has a gate shape provided along the left and right side portions of the first filter portion 30 and the outer circumference of the upper portion, and the center side and the lower portion of the first filter portion 30. The gas that has passed through the side is not taken in.

Since gas having a high paint concentration gathers on the center side of the first filter unit 30 in relation to the coating machine 11, the gas passing through the center side of the first filter unit 30 passes through the outer peripheral side of the first filter unit 30. It has a higher paint content than the gas that has passed through.

Therefore, in the present embodiment, by providing the second filter unit 40 along the outer peripheral side of the first filter unit 30, a gas having a low paint content passes through the pre-filter 41 and the medium-performance filter 42. The time until the replacement of the pre-filter 41 and the medium-performance filter 42 is lengthened, and the content of the paint contained in the gas after passing through the pre-filter 41 and the medium-performance filter 42 is extremely low. It is circulated in the painting room 10.

(Exhaust unit 22)
As shown in FIG. 1, the exhaust unit 22 has an exhaust fan unit 22a provided on the ceiling of the exhaust chamber 20 so as to communicate with the exhaust chamber 20, and the gas sucked by the exhaust fan unit 22a is installed outdoors (for example,). It has an exhaust duct (not shown) that leads to (on the roof of the building).
In FIG. 1, the impeller provided in the exhaust fan portion 22a is not shown.

In the present embodiment, the exhaust unit 22 discharges the gas in the exhaust chamber 20 to the ^{outside of the building at a flow rate of 55 m 3} / min, and the second gas supply unit 24, which will be described later, circulates the gas in the coating chamber 10 again. By exhausting a part of the gas through the exhaust unit 22 instead of setting the circulation amount of the gas to the total amount of the gas flowing into the exhaust chamber 20, it is possible to prevent the concentration of volatile components and the like in the coating chamber 10 from increasing. ..
The first filter unit 30 of the present embodiment releases the paint contained in the gas to a level that can be released to the atmosphere, so that the paint is released to the atmosphere. However, if necessary, the exhaust duct is connected to the combustion equipment. The paint or the like contained in the gas may be burned.

(1st gas supply unit 23)
As shown in FIGS. 2, 4 and 6, the first gas supply unit 23 is arranged outside the right side wall of the exhaust chamber 20 in the rear view shown in FIG. 4, and is arranged along the outer surface of the right side wall. The first fan portion 23a provided, the particle filter 23b provided in the gas intake portion that takes in gas by the suction force of the first fan portion 23a, and the coating booth from the exhaust chamber 20 side toward the coating chamber 10 side. A first supply duct 23c (see FIGS. 1 and 4), which is provided along the ceiling of No. 1 and guides gas from the first fan portion 23a to the position of the ceiling on the opening 13 side of the coating chamber 10, and the coating chamber 10. A first gas discharge unit 23d (see FIG. 5) provided on the ceiling on the opening 13 side and connected to the first supply duct 23c is provided.

Then, as shown in FIG. 5, the wind direction of the supplied gas is adjusted to the opening of the first gas discharge unit 23d, which is the first gas supply port 23e of the first gas supply unit 23 that supplies the gas to the coating chamber 10. The first wind direction adjusting unit 23f (louver) is provided.

In the present embodiment, dust and the like in the gas whose temperature and humidity are controlled in the room where the painting booth 1 is installed are removed by the particle filter 23b and taken into the first gas supply unit 23, and the temperature is stored in the painting room 10. A new gas with controlled humidity and humidity is supplied, but by setting the flow rate of this supplied gas to 55 m ³ / min, the same amount as the flow rate discharged from the exhaust unit 22 to the outside of the building can be supplemented. I have to.

(2nd gas supply unit 24)
As shown in FIGS. 1 and 5, the second gas supply unit 24 is arranged on the ceiling of the exhaust chamber 20 and is connected to the second gas intake unit 43 of the second filter unit 40 with the second fan unit 24a. , The gas is provided along the ceiling of the painting booth 1 from the exhaust chamber 20 side toward the painting chamber 10 side, and the gas sucked through the second filter portion 40 by the suction force of the second fan portion 24a is sent to the coating chamber 10 side. Is equipped with a second supply duct 24b that guides the paint booth 1 along the ceiling.

Further, as shown in FIG. 1, the second gas supply unit 24 is provided on the ceiling on the opening 13 side of the coating chamber 10 and includes a second branch duct 24c connected to the second supply duct 24b. The second branch duct 24c extends to both sides of the opening 13 and opens to the painting chamber 10 side to supply gas to the painting chamber 10 as a second pair of second gas supply units 24. It constitutes a gas supply port 24d (see FIG. 7).

Then, as shown in FIG. 5, the pair of second gas supply ports 24d have a second wind direction adjusting unit 24e (louver) that directs the gas supplied to the coating chamber 10 toward the coating machine 11 (see FIG. 7). It is provided.
For example, in the present embodiment, ^{the gas of 41 m 3} / min from the exhaust chamber 20 is taken in by the second gas supply unit 24 through the second filter unit 40 and supplied to the coating chamber 10 so as to be circulated to the coating chamber 10. ing.

In addition to the above, as shown in FIGS. 2, 3 and 7, the left and right side walls of the painting chamber 10 are provided with a painting chamber door 2a for entering the painting chamber 10 together with the painting chamber window 2b. When the painting machine 11 (see FIG. 7) is not in operation, the painting room 10 can be entered through the painting room door 2a to perform maintenance of the painting machine 11.
Further, as shown in FIG. 4, an exhaust chamber door 3 for entering the exhaust chamber 20 is also provided on the side wall on the rear side of the exhaust chamber 20, and the coating machine 11 (see FIG. 7) is not operating. Occasionally, the exhaust chamber 20 is entered through the exhaust chamber door 3, and maintenance of the first filter unit 30 and the second filter unit 40 can be performed.

A more detailed explanation will be given while explaining the gas flow and the like for the coating booth 1 having the above configuration.
For example, in the case of a painting booth where people enter the painting room during painting, the Industrial Safety and Health Act requires that the painting room be supplied with gas so that the controlled wind speed is 0.4 m / sec or more with a uniform flow. As a result, gas with controlled temperature and humidity is discharged from the painting booth, resulting in high running costs.

Therefore, in the present embodiment, by providing the opening 13 in the painting chamber 10, the painting work can be performed even if no person enters the painting chamber 10 during painting, and the painting chamber is prohibited from entering during painting. By setting the value to 10, it is not necessary to create an environment in which the coating chamber 10 has a uniform flow and a controlled wind speed of 0.4 m / sec or more.

Therefore, in the present embodiment, the control wind speed itself of the coating chamber 10 is set to be less than 0.4 m / sec, and the amount of gas that must be supplied to the coating chamber 10 is significantly reduced for coating. The total amount of temperature- and humidity-controlled gas discharged from booth 1 is greatly reduced.
Therefore, the necessary cost related to air conditioning in the room where the painting booth 1 is arranged is significantly suppressed, and the running cost can be reduced.

Specifically, since the total amount of gas flowing from the coating chamber 10 to the exhaust chamber 20 side is determined by the total amount of gas taken into the second gas supply unit 24 and the exhaust unit 22, the second gas supply unit 24 and the exhaust unit 22 The total amount of gas taken into the coating chamber 10 is set so that the controlled air velocity in the coating chamber 10 is less than 0.4 m / sec, and the amount of gas discharged from the exhaust unit 22 is set to be as small as possible.

On the other hand, if gas is drawn into the painting chamber 10 from the opening 13 in the painting chamber 10, dust or the like in the room where the painting booth 1 is installed may be sucked in and adhere to the object to be coated 15. , The total amount of gas supplied from the first gas supply unit 23 and the second gas supply unit 24 to the coating chamber 10 is the first pressure inside the coating chamber 10 and the second pressure outside the opening 13 (the coating booth 1 is The total amount is set to balance the second pressure in the room where it is installed.

Specifically, as described above, since the second gas supply unit 24 ^{discharges 41 m 3} / min of gas and the exhaust unit 22 ^{discharges 55 m 3} / min of gas from the exhaust chamber 20, the coating chamber 10 ^{A gas of 96 m 3} / min is flowing from the exhaust chamber 20 toward the exhaust chamber 20.

^{Therefore, a new gas of 55 m 3} / min is supplied from the first gas supply unit 23 to the coating chamber 10, ^{and the 41 m 3} / min gas discharged from the exhaust chamber 20 by the second gas supply unit 24 is coated again. By supplying to the chamber 10, a total amount of 96 m ³ / min of gas is supplied to the coating chamber 10, and the same amount of gas as the total amount of gas discharged from the exhaust chamber 20 (96 m ^{3 / min) is supplied to the coating chamber 10.} We are supplying.
Therefore, only the gas supplied from the first gas supply unit 23 and the second gas supply unit 24 flows to the exhaust chamber 20 side, and it is suppressed that the gas is drawn into the coating chamber 10 through the opening 13. doing.

On the other hand, the paint sprayed from the coating machine 11 (see FIG. 7) toward the object to be coated 15 is not 100% coated on the object to be coated 15, and the non-applied paint is near the object to be coated 15. If it floats on the surface, uneven coating may occur due to unexpected coating.

Further, if such uncoated floating paint flows to the opening 13 side, there is a problem in hygiene of the operator.
For this reason, in the present embodiment, the opening 13 is provided on the side surface (front side wall) of the coating chamber 10 facing the exhaust chamber 20, and the second gas supply portion 24 is provided on both sides of the opening 13. The second gas supply port 24d is positioned, and the gas supplied from the second gas supply port 24d to the coating chamber 10 is supplied to the coating machine 11 (see FIG. 7) side to the pair of second gas supply ports 24d. A second wind direction adjusting unit 24e (louver) to be directed is provided.

Therefore, a gas flow is created from the opening 13 side toward the vicinity of the coating machine 11 (see FIG. 7) toward the exhaust chamber 20 side, and even if the controlled wind speed itself of the coating chamber 10 is less than 0.4 m / sec. In the vicinity of the coating machine 11 (see FIG. 7), the wind speed sufficient to efficiently guide the floating paint to the exhaust chamber 20 side is guaranteed.

Further, since the new gas supplied from the first gas supply unit 23 into the coating chamber 10 is also supplied from the ceiling side near the opening 13, this gas also flows toward the exhaust chamber 20 side. Even if the control wind speed itself is reduced, the floating paint is surely prevented from flowing toward the opening 13 side.

Therefore, in the painting booth 1 of the present embodiment, the painting room 10 is a painting room 10 in which people are prohibited from entering during painting, and the control wind speed is 0.4 m / sec or more with a uniform flow defined by the Industrial Hygiene and Safety Law. The total amount of gas supplied to the painting chamber 10 ^{is significantly reduced to less than 100 m 3} / min as a whole, and more than 40% of the gas supplied to the painting chamber 10 is eliminated. Is circulated from the exhaust chamber 20 side to significantly reduce the amount of new gas supplied to the painting chamber 10, so running such as electricity costs required for air conditioning (regulation of gas temperature and humidity) The cost is greatly reduced.

On the other hand, in the coating booth 1 of the present embodiment, the gas is supplied into the coating chamber 10 in order to suppress coating unevenness and the like that may occur when the gas supplied to the coating chamber 10 is significantly reduced. By making it possible to adjust the wind direction of the gas and making the gas supply state appropriate, the occurrence of coating unevenness and the like is suppressed, and the gas supply position to the coating chamber 10 is set around the opening 13. A good painting booth 1 is realized by making the working environment of the worker who works near the painting booth 1 good.

In the above embodiment, the first gas supply unit 23 takes in the gas in the room where the painting booth 1 is installed via the particle filter 23b, but the first gas supply unit 23 directly air-conditions. Needless to say, gas may be taken in from equipment (equipment that regulates temperature and humidity).

Although the coating booth 1 of the present invention has been described above based on the specific embodiment, the present invention is not limited to the above specific embodiment, and is appropriately modified or improved. Is also included in the technical scope of the present invention, which is clear to those skilled in the art from the description of the scope of claims.

1 Painting booth 2a Painting room door 2b Painting room window 3 Exhaust room door 10 Painting room 11 Painting machine 12 Position 13 Opening 14 Rail 15 Material 16 Conveying part 20 Exhaust room 21 Intake port 22 Exhaust part 22a Exhaust fan part 23 1st gas supply unit 23a 1st fan unit 23b Particle filter 23c 1st supply duct 23d 1st gas discharge unit 23e 1st gas supply port 23f 1st wind direction adjustment unit 24 2nd gas supply unit 24a 2nd fan unit 24b 2nd Supply duct 24c 2nd branch duct 24d 2nd gas supply port 24e 2nd air direction adjusting unit 30 1st filter unit 31 Primary filter 32 Secondary filter 33 3rd filter 40 2nd filter unit 41 Prefilter 42 Medium performance filter 43 2nd gas Intake unit 43a Second gas intake port

Claims (5)

It ’s a painting booth,
A painting room where entry is prohibited during painting and a painting machine is installed to paint the object to be painted.
An exhaust chamber connected to the coating chamber and having an intake port for taking in gas from the coating chamber on the side facing the coating machine with a position where the object to be coated is arranged at the time of painting.
A first filter unit provided on the intake side of the exhaust chamber and
An opening provided in the painting chamber and connected to the outside of the painting booth,
An exhaust unit that exhausts a part of the gas in the exhaust chamber to the outside,
A first gas supply unit that supplies new gas to the painting chamber,
A second filter unit provided on the opposite side of the painting chamber with the first filter unit interposed therebetween
A second gas supply unit that takes in gas through the first filter unit and the second filter unit and supplies the taken-in gas to the coating chamber is provided.
The painting booth is characterized in that the second filter portion is provided on the outer peripheral side of the first filter portion. The first aspect of the present invention is characterized in that the total amount of gas supplied from the first gas supply unit and the second gas supply unit to the coating chamber is set to the total amount of gas discharged from the exhaust chamber. The listed painting booth. Claim 1 or claim, wherein the total amount of gas taken into the second gas supply unit and the exhaust unit is set so that the controlled wind speed in the coating chamber is less than 0.4 m / sec. The painting booth described in 2. The opening is provided on the side surface of the painting chamber facing the exhaust chamber.
The second gas supply unit is provided on both sides sandwiching the opening, a pair of the air-supplying port for supplying the gas to the coating chamber,
The front Kiki-supplying port, any one of claims 1 to 3, wherein the wind direction adjusting unit that toward the side of the coating machine a gas is provided to be supplied to the paint chamber The painting booth described in the section. The first gas supply unit according to claim claim 1, wherein the provided in the ceiling of the opening-side coating chamber, and a gas-supplying port that to supply gas to the coating chamber The painting booth according to any one of 4.

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