JP2886004B2 - Paint circulation device in painting booth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint circulating apparatus in a paint booth. More specifically, the present invention relates to a paint circulating device in a paint booth that circulates paint to a paint room.

[0002]

2. Description of the Related Art FIG. 3 is a cross-sectional view showing a schematic structure of a conventional painting booth, and FIG. 4 is a piping diagram of a paint circulation device applied to the painting booth.

In these figures, reference numeral 1 denotes a booth body. The booth body 1 is long (for example, 80 to 120
m), the coating zone of the main body 1 is provided with a coating chamber 2, an air supply chamber 3 (dynamic pressure chamber 4, static pressure chamber 5) and an exhaust processing chamber 8 in the vertical direction.

[0004] The coating room 2 is a room for coating a work (for example, an automobile body) W transferred in a work transfer region 49 extending in the left-right direction in FIG. The first and second side coating machines 41L and 41R, the upper coating machine 47, and the like are provided as coating means. The work transfer area 49 is provided on one side and the other side of the coating machine 41L, 4
In general, the 1R is provided at the center in the booth width direction due to the arrangement of the 1R. Each coating machine 41 in this coating room 2
The paint is circulated and supplied to L, 41R, and 47 by a paint circulation device 10A.

[0005] As shown in FIG.
The paint in a predetermined number of paint tanks 32 installed for each color in the paint mixing chamber 31 is applied to the coating chamber 2 (each of the coating machines 41L, 41R,
47) paint feed lines 11L and 11 for circulating supply
R and the paint return pipes 15L and 15R, each of the pipes 11L and 15L on one side, and a coating machine (for example, 41) in the coating chamber 2.
L, 47), the branch pipes 18L, the respective pipelines 11R, 15R on the other side, and a coating machine (for example, 41) in the coating room 2.
R) and a branch pipe 18R that connects the branch pipe 18R.

[0006] The paint mixing chamber 31 and the booth body 1 are
For safety measures, it is general that the distance is about 100 to 200 m. The paint feed pipes 11L and 11R and the paint return pipes 15L and 15R are respectively formed of a predetermined number of paint feed pipes and paint return pipes. For example, when each of the coating machines (41L, 41R, 47) is capable of switching and spraying 50 colors of paint, the paint feed pipe and the paint return pipe for the number of color switches (ie, 50 pipes) are provided. Required. Each of the coating booth-side portions 11a, 11a, of these one-side pipes (11L, 15L) and the other-side pipes (11R, 15R).
As shown in FIG. 3, 15a is generally attached to the outer wall of the coating room 2 via a bracket or the like.

[0007] The air supply chamber 3 of the painting booth is
, And includes a dynamic pressure chamber 4 and a static pressure chamber 5. In addition, between the dynamic pressure chamber 4 and the static pressure chamber 5, partition plates 6 each having a slit 6a (or a bag filter) are interposed in order to keep the wind speed constant. Also, between the static pressure chamber 5 and the coating chamber 2,
A filter mat 7 is interposed to remove dust and the like.

The air sent into the air supply chamber 3 and supplied into the coating chamber 2 is heated to a predetermined temperature (for example, 20 to 30 ° C.) by an air conditioner (not shown) in order to improve coating quality and protect the working environment. Generally, the temperature is adjusted. In FIG. 3, reference numeral 29 denotes a one-side conduit (1
This is a regulator box for connecting each coating booth-side portion 11a, 15a of each of the coating booths (41L, 47, 41R) of the other pipe line (11R, 15R) and the other side pipeline (11R, 15R). Thus, the work transfer area 49 in the coating room 2
Is supplied to the work W transported.

[0009]

In the above-described paint circulating apparatus 10A, the viscosity of the paint changes according to the temperature, and the flow rate increases and decreases.
41R, 47), an excessive supply or shortage of the paint may cause a coating failure.

Therefore, in order to prevent such inconvenience,
The temperature is controlled by using a heat exchanger or the like so that the paint temperature is constant, and each of the one-side pipes (11L, 15L) and the other-side each pipe (11R, Fifteen
The R) portion may be covered with a heat insulating material 39 such as glass wool to keep the temperature. However, the above-mentioned heat-retaining work is performed over a range of several tens of meters, which is troublesome and increases the cost. In addition, the amount of protrusion in the lateral direction of both pipes (11L and 15L, 11R and 15R) increases, and the entire painting booth becomes even larger.

Therefore, there is a demand for the development of a paint temperature control technique that eliminates the above-mentioned drawbacks. However, this development requires other coating conditions (smooth air supply from the air supply chamber 3 to the coating chamber 2, work W
It is premised that the coating does not impair the coating.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a paint booth that is circulated and supplied while reducing the size and cost of a paint booth under the assurance of a smooth supply of air into the paint chamber and prevention of paint dripping. The present invention is to provide a paint circulating device in a paint booth that can maintain a constant paint temperature.

[0013]

According to the present invention, there is provided a paint circulating apparatus in a paint booth according to the present invention, wherein a paint feed pipe for circulating and supplying paint to a paint chamber to which temperature-controlled air is supplied from an upper air supply chamber. And a paint circulating device in a paint booth having a paint return pipe, wherein each paint booth-side portion of the paint feed pipe and the paint return pipe is housed in the air supply chamber so as to be displaced from the work transfer area in the paint chamber. Connecting each coating booth-side portion of the paint feed pipe and the paint return pipe with the coating means in the coating chamber via a feed branch pipe and a return branch pipe to circulate the paint through the coating means. It is characterized in that it is configured to supply.

[0014]

According to the present invention, the paint is circulated and supplied to the coating chamber (painting means) through the paint feed pipe and the paint return pipe, and the feed branch pipe and the return branch pipe.

Here, since the temperature of the air supply chamber is controlled to be substantially the same as that of the coating chamber, the paint is naturally controlled while being circulated through the coating booth side of each pipe. Therefore, there is no need to provide a special heat exchanger or the like for controlling paint temperature. Also,
It is no longer necessary to cover each pipe with a heat insulating material such as glass wool as in the related art, and the need for laborious and costly heat insulation work is eliminated.

[0016] In addition, from a set of paint feed pipe and paint return pipe, the paint is applied to the coating means disposed on both the left and right sides in the coating chamber by using the feed branch pipe and the return branch pipe. Can be circulated, and the pipe line is about half as long as the conventional paint circulating device that requires a paint feed line and a paint return line for each of the left and right coating means. Is reduced. Further, since the coating booth-side portions of both pipelines are accommodated in the air supply chamber, they do not protrude from both side walls of the booth main body as in the related art.

As described above, it is possible to keep the temperature of the paint supplied to the paint chamber constant while reducing the size and cost of the paint booth.

Further, the paint booth side portions of the paint feed pipe and the paint return pipe are housed in the air supply chamber. However, since the housing positions are shifted from the work transfer area in the paint chamber, the work transfer is performed. The flow of air supplied from the air supply chamber to a work (for example, an automobile body) conveyed in the area is not obstructed by the coating booth-side portion of each pipe. Also, even if paint leaks from the paint booth side of each pipeline,
No paint is applied to the work. As a result, it is possible to ensure a smooth air supply into the coating chamber and prevent the paint from dripping.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view for explaining an embodiment of the present invention, and FIG. 2 is a paint feed pipe, a paint return pipe, a feed branch pipe, and a return branch pipe provided in an air supply chamber. FIG. 4 is a diagram for explaining a positional relationship with the data.

The paint circulating apparatus in the paint booth has a paint feed pipe 11 and a paint return pipe 15 for circulating and supplying paint from each paint tank of a paint mixing chamber (not shown) to the coating chamber 2 of the paint booth. The coating booth-side portions 11a and 15a of the pipes 11 and 15 are accommodated in the supply chamber 3 so as to be displaced from the work transfer area 49 in the coating chamber 2, and the coating booths of the pipes 11 and 15 are accommodated. Side parts 11a, 15
a and the coating means (41L, 41R, 45L,
45R, etc.) via the feed branch pipes (21L, 21R) and the return branch pipes (25L, 25R) to circulate and supply the paint to the coating means (41L, 41R, 45L, 45R, etc.). It is configured to be. FIG. 3 (conventional example)
The same reference numerals are given to the same parts as those described above, and the detailed description thereof will be omitted.

More specifically, the coating booth-side portions 11a and 15a of the paint feed pipe 11 and the paint return pipe 15 are mounted near the inner side wall 5R of the static pressure chamber 5 constituting the air supply chamber 3 in FIG. It is arranged via a member 19. Paint feed line 11
As shown in FIG. 2, a predetermined number of feed pipes 12 and return pipes 16 are provided in parallel with each other.
It is composed of The static pressure chamber 5 of the air supply chamber 3 has a height that allows walking, and an entrance 5D for workers is provided on the inner wall 5R.

On the other hand, as shown in FIG. 1, a predetermined number of one-side painting machines 41L capable of spraying a paint on a work (car body) W and a hand-blown painting gun 4 are provided on both sides in the painting chamber 2.
5L, the other side coating machine 41R, a hand-blown coating gun 45R, and the like are accommodated.

Here, the coating booth-side portions 11a and 15a of the paint feed line 11 and the paint return line 15, the one-side coating machine 41L and the coating gun 45L, etc. are connected to the one-side feed branch line 21L and the return branch. The paint is circulated and supplied to the one-side coating machine 41L, the coating gun 45L, and the like via the respective pipelines. On the other hand, the feed branch line 21L and the return branch line 25
As shown in FIG. 2, L is formed of a predetermined number of feed branch hoses 22L and return branch hoses 26L. One end of each of the branch hoses 22L and 26L is connected to the feed pipe 12 and the return pipe 16, and the other end is connected to each one-side coating machine 41L and the coating gun 45L.

The coating booth-side portions 11a and 15a of the paint feed line 11 and the paint return line 15 and the other side coating machine 41R and the coating gun 45R are connected to the other side feed branch line 21R and the return branch line. The paint is circulated and supplied to the other-side painting machine 41R and the painting gun 45R through the respective pipelines.
On the other hand, the feed branch line 21R and the return branch line 25R are
Each is formed of a predetermined number of the feed branch hose 22R and the return branch hose 26R. Each branch hose 22
One end of each of R and 26R is connected to the feed pipe 12 and the return pipe 16, and the other end is connected to each other-side coating machine 41R and the coating gun 45R. In addition,
In FIG. 1, reference numeral 4D denotes an entrance of the dynamic pressure chamber 4.

Next, the operation will be described. The paint circulates through the paint feed pipe 11, the paint return pipe 15, the one-feed branch pipe 21L and the return branch pipe 25L to the one-side coating machine 41L and the coating gun 45L in the coating chamber 2. Supplied. The paint is circulated and supplied to the other side coating machine 41R and the paint gun 45R through the paint feed pipe 11 and the paint return pipe 15, and the other feed branch pipe 21R and the return branch pipe 25R.

Here, since the temperature of the air supply chamber 3 is controlled to be substantially the same as the temperature of the coating chamber 2, the paint naturally flows while being circulated through the coating booth-side portions 11a and 15a of the pipelines 11 and 15. Temperature controlled. Therefore, it is not necessary to provide a special heat exchanger or the like for controlling paint temperature. Further, as in the conventional case, each of the pipes 11, 1
It is not necessary to cover the heat insulating material such as glass wool on the surface 5, and it is not necessary to perform a time-consuming and costly heat insulation work.

Further, the coating room 2 is provided from a set of the paint feed line 11 and the paint return line 15 by using the feed branch lines (21L, 21R) and the return branch lines (25L, 25R).
One side and the other side of the coating means (41L and 41R, 4
5L and 45R etc.), and the pipe line is about half that of the conventional paint circulating apparatus which requires a paint feed line and a paint return line for each coating means on one side and the other side. The length is sufficient, and plumbing work is greatly reduced. Further, the coating booth side portions 11a, 15 of the respective pipelines 11, 15 are also provided.
a is stored in the air supply chamber 3, so that the booth body 1
Will not protrude from both side walls.

As described above, the temperature of the paint supplied to the coating chamber 2 can be kept constant while reducing the size and cost of the painting booth.

On the other hand, the coating booth-side portions 11a and 15a of the paint feed pipe 11 and the paint return pipe 15 are housed in the air supply chamber 3, but are housed in the work transfer area 49 in the coating chamber 2. The flow of the temperature-controlled air supplied from the air supply chamber 3 through the filter mat 7 to the workpiece W transported in the workpiece transport area 49 is different from that of the pipes 11 and 15. Booth side parts 11a, 15a
Not disturbed by Also, in the unlikely event that each pipeline 11, 1
Even if the paint leaks from the paint booth side portions 11a and 15a of No. 5, the paint is not applied to the work W. Thereby, it is possible to ensure a smooth air supply into the coating chamber 2 and to prevent the paint from dripping.

As described above, since the coating booth-side portions 11a and 15a of the conduits 11 and 15 are accommodated in a position deviated from the central position in the booth width direction, the portions 11a and 1a are respectively displaced.
The work of laying the filter mat 7 and the like can be smoothly performed without being hindered by 5a.

Since the paint feed pipe 11 and the paint return pipe 15 are provided in the air supply chamber 3 and are not exposed to the outside, they are not used as scaffolds as in the prior art. No load is applied.

Since the static pressure chamber 5 of the air supply chamber 3 has a walkable height, it is convenient for maintenance of the paint feed pipe 11 and the paint return pipe 15 and the like.

Further, each of the conduits 11 and 15 may be provided in the dynamic pressure chamber 4 of the air supply chamber 3 so as to be displaced from the work transfer area 49 in the coating chamber 2.

[0034]

According to the present invention, each paint booth side portion of the paint feed pipe and the paint return pipe is housed in the air supply chamber so as to be displaced from the work transfer area in the paint chamber. Of the coating booth and the coating means in the coating chamber are connected via a feed branch pipe and a return branch pipe, ensuring smooth air supply into the coating chamber and prevention of paint dripping. The temperature of the paint supplied to the paint room can be kept constant while reducing the size and cost of the paint booth.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view for explaining an embodiment of the present invention.

FIG. 2 is a diagram for explaining a positional relationship between a paint feed pipe and a paint return pipe and a feed branch pipe and a return branch pipe provided in an air supply chamber.

FIG. 3 is a cross-sectional view showing a schematic configuration of a conventional painting booth.

FIG. 4 is a piping diagram of a paint circulation device applied to a conventional painting booth.

[Explanation of symbols]

 Reference Signs List 2 paint room 3 air supply room 11 paint feed line 11a paint booth side portion of paint feed line 15 paint return line 15a paint booth side portion of paint return line 21L one-side branch pipe line 21R the other side branch pipe Road 25L One-side branch branch line 25R The other-side branch branch line 41L One side coating machine 41R The other side coating machine 45L One side coating gun 45R The other side coating gun 49 Work transfer area

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-39336 (JP, A) JP-A-60-14964 (JP, A) JP-A-5-247202 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) B05B 15/00-15/12 B05C 11/10 B05C 15/00

Claims (1)

(57) [Claims] 1. A paint circulating apparatus in a paint booth having a paint feed pipe and a paint return pipe for circulating and supplying paint to a paint chamber to which temperature-conditioned air is supplied from an upper supply chamber. The paint booth side portions of the feed pipe and the paint return pipe are accommodated in the air supply chamber so as to be displaced from the work transfer area in the paint chamber, and the paint feed pipe and the paint return pipe are located on the paint booth side. Paint circulation in a painting booth, characterized in that the portion and the painting means in the painting chamber are connected via a feed branch pipe and a return branch pipe so as to circulate and supply paint to the painting means. apparatus.