JP2024037206A - Paint processing equipment - Google Patents

Abstract

[Problem] To provide a coating processing device that can achieve both coating quality and energy saving performance. A painting processing apparatus 1 includes a painting booth 10, a transport robot 20 provided in the painting booth 10 and configured to be able to transport a workpiece W between a painting position P2 and evacuation positions P1 and P3; A coating machine 40 injects paint N toward a workpiece W transported to a coating position P2 by a transportation robot 20, and an air supply supplying conditioned air A downward from the ceiling 11 of the coating booth 10 into the coating processing space 13a. The retracted positions P1 and P3 are located higher than the painting position P2 and laterally away from the painting position P2. [Selection diagram] Figure 1

Description

The present invention relates to a coating processing apparatus.

Patent Document 1 listed below discloses a painting processing apparatus for painting an automobile body as a workpiece. This painting processing apparatus includes a robot provided in a painting booth and an air conditioner. The robot is an articulated robot with many joints, and is configured so that it can hold a workpiece at its tip, change its position and posture, and transport the workpiece between the painting position and the retreat position. There is. The air conditioner is installed on the ceiling of the paint booth and is configured to supply conditioned air with controlled temperature and humidity into the paint booth. According to such an air conditioner, the inside of the painting booth is controlled to have air conditioning conditions suitable for painting work.

Japanese Patent Application Publication No. 2005-103446

By the way, the energy cost required for air conditioning inside a paint booth increases as the paint booth becomes larger. That is, as the size of the painting booth increases, the amount of air conditioned air used increases. Therefore, in order to improve the energy saving performance of this type of coating processing apparatus, it is preferable to downsize the coating booth.

However, when the paint booth is downsized, the lateral distance between the painting position and the retracted position becomes smaller, and paint dust scattered at the painting position may reach the retracted position. In this case, a phenomenon occurs in which scattered paint dust adheres to the workpiece placed at the retracted position (that is, the workpiece before or after painting). Such a phenomenon is generally referred to as "paint fog."

For example, if paint dust adheres to a workpiece before painting, the color of the paint dust will be mixed with the color of the paint used during painting. Furthermore, if paint dust adheres to the workpiece after painting, this paint dust will form paint spots on the surface of the workpiece. Therefore, reducing the size of the painting booth may cause a problem in that the quality of the painting deteriorates. On the other hand, if you try to move the retraction position horizontally far away from the painting position to prevent paint dust from reaching the workpiece, the painting booth will become larger, which is not the original purpose. , it is difficult to achieve the desired energy saving performance of the coating processing equipment.

The present invention has been made in view of this problem, and it is an object of the present invention to provide a coating processing device that can achieve both coating quality and energy saving performance.

One aspect of the present invention is
paint booth and
a transport robot installed in the painting booth and configured to transport a workpiece between a painting position and a retreat position;
a coating machine that sprays paint toward the workpiece transferred to the coating position by the transfer robot;
an air supply unit that supplies conditioned air downward from the ceiling of the painting booth to the painting processing space;
Equipped with
The retracted position is higher than the painting position and is located laterally away from the painting position, the painting processing device;
It is in.

In the painting processing apparatus of the above-described aspect, the workpiece is transported between the painting position and the retreat position by a transporting robot provided in the painting booth. This workpiece is transported to a painting position by a transporting robot and is painted with paint sprayed from a coating machine. On the other hand, conditioned air is supplied downward from the air supply section to the painting processing space. Therefore, the paint dust that is sprayed from the paint sprayer at the painting position and scattered around the work without being applied to the workpiece flows down through the painting processing space in the painting booth according to the downward flow of air-conditioned air.

This aspect is characterized in that the retracted position of the workpiece is located higher than the painting position and laterally away from the painting position. As a result, paint dust generated at the painting position reaches the evacuation position from the painting position because the evacuation position is higher than the painting position and also because it flows down from the painting position due to the influence of air conditioning wind. be prevented from doing so. Therefore, paint dust can be prevented from adhering to the workpiece placed at the retracted position and deteriorating the coating quality.

Further, if the retracted position is set higher than the painting position, the painting quality is less likely to be affected, so the lateral distance between the retracted position and the painting position can be kept small. That is, the retracted position and the painting position can be brought as close as possible in the horizontal direction. As a result, the paint booth can be downsized, and energy saving performance can be improved by reducing the amount of air conditioned air used.

As described above, according to the above-described aspect, it is possible to provide a coating processing apparatus that can achieve both coating quality and energy saving performance.

1 is a diagram showing the internal structure of the coating processing apparatus of Embodiment 1 from the side; FIG. A view of the painting room in FIG. 1 viewed from above. FIG. 7 is a diagram showing the internal structure of the coating processing apparatus of Embodiment 2 from the side. FIG. 7 is a diagram showing the internal structure of the coating processing apparatus of Embodiment 3 from the side.

Preferred embodiments of the above aspects are described below.

The painting processing apparatus according to the above aspect includes a painting robot that holds the painting machine from above, and the transporting robot transports the workpiece between the retreat position and the painting position while supporting the workpiece from below. Preferably, it is configured to do so.

According to this painting processing device, the transport robot supports the workpiece from below, while the painting robot holds the coating machine from above, so one of the transport robot and the painting robot is responsible for the movement of the other. can be prevented from interfering with

In the painting processing apparatus of the above aspect, the retreat position includes a pre-painting position before the workpiece is transported to the painting position, and a post-painting position where the workpiece is transported after being painted at the painting position. is set, and it is preferable that this painting processing apparatus includes a conveyor rail extending in the horizontal direction so as to support the work at each of the pre-painting position and the post-painting position.

According to this painting processing device, paint dust generated at the painting position adheres to the workpiece carried to the pre-painting position by the conveyor rail, and the color of the paint at the time of painting is mixed with the color of this paint dust, resulting in quality of painting. can be prevented from decreasing. In addition, paint dust generated at the painting position adheres to the workpiece before being carried out from the post-painting position by the conveyor rail, and this paint dust forms paint spots on the surface of the workpiece, reducing the quality of the painting. It can be prevented.

In the painting processing apparatus of the above aspect, it is preferable that the conveyor rail is arranged at a higher location than the painting position.

According to this painting processing apparatus, by arranging the conveyor rail higher than the painting position, it is possible to suppress paint dust generated at the painting position from adhering to the conveyor rail. Thereby, the maintenance cost required for cleaning the conveyor rail can be kept low.

In the coating processing apparatus of the above aspect, it is preferable that the main body of the conveying robot is provided directly below the conveyor rail.

According to this coating processing apparatus, by providing the main body of the transport robot directly below the conveyor rail, the transport distance by the transport robot can be kept short. This makes it possible to shorten the cycle time required for transporting the workpiece between the retreat position and the painting position.

The painting processing apparatus of the above aspect includes, when the air supply section is a first air supply section, a second air supply section provided on a side wall of the painting booth in addition to the first air supply section. Preferably, the second air supply section is configured to supply conditioned air laterally to the painting processing space and to flow it from the side of the main body and the conveyor rail toward the painting position.

According to this painting processing device, paint dust generated at the painting position is prevented from adhering to the main body of the transport robot and the conveyor rail by the air-conditioned air supplied from the second air supply section to the painting processing space. Can be done. As a result, maintenance costs required for cleaning the transport robot and the conveyor rail can be kept low.

Hereinafter, specific embodiments of the coating processing apparatus of the above aspect will be described with reference to the drawings.

In the drawings for explaining this embodiment, unless otherwise specified, the two mutually orthogonal horizontal directions of the coating booth are indicated by arrows X and Y, and the height direction (vertical direction) of the coating booth is indicated by arrow Z. shall be taken as a thing.

(Embodiment 1)
As shown in FIG. 1, the coating processing apparatus 1 of Embodiment 1 is an apparatus for spray coating a workpiece W. As shown in FIG. In this embodiment, the painting processing apparatus 1 is a large-sized one in which the work W is assumed to be an automobile body. The coating processing apparatus 1 includes a coating booth 10, a conveyor rail 17, a transport robot 20, a coating robot 30, a coating machine 40, and an air conditioner 50.

Here, the painting booth 10 is roughly divided into a painting room 13, an air supply room 12 provided in the ceiling 11 above the painting room 13, and a paint recovery room 14 provided below the painting room 13. be done.

The air supply chamber 12 is an air supply section that supplies conditioned air A downward from the ceiling 11 of the coating booth 10 to the coating processing space 13a of the coating room 13. An indoor space 12a of this air supply chamber 12 is connected to a duct 51 of an air conditioner 50. The air conditioner 50 has a function of generating conditioned air A by introducing outside air and adjusting the temperature and humidity. Conditioned air A generated by this air conditioner 50 is introduced into the indoor space 12a through a duct 51. Furthermore, the conditioned air A of the indoor space 12a is supplied to the painting processing space 13a of the painting room 13 through the filter member 15.

The paint recovery chamber 14 is for recovering paint dust D that has not been used in the painting chamber 13. In the painting processing space 13a of the painting room 13, the paint dust D flows downward as a spray-like mist according to the downward flow of the air volume A under the suction effect of an exhaust fan (not shown). The paint dust D flows into the indoor space 14a of the paint collection chamber 14 through the collection port 16a of the partition floor 16 and is collected.

A conveyor rail 17, a transport robot 20, and a painting robot 30 are provided in the painting processing space 13a of the painting room 13. The conveyor rail 17 extends linearly in the horizontal direction Y so as to support the workpiece W at each of a pre-painting position P1 and a post-painting position P3. The transport robot 20 and the painting robot 30 have similar structures.

The transport robot 20 generally has a function of transporting the workpiece W between the painting position P2, the pre-painting position P1, and the post-painting position P3. According to the transport robot 20, the workpiece W is appropriately transported between the pre-painting position P1 and the painting position P2, and also between the post-painting position P3 and the painting position P2.

On the other hand, the painting robot 30 generally has the function of holding and moving the painting machine 40. According to this coating robot 30, the coating machine 40 is transported to above the coating position P2 during the coating process of the workpiece W. At this time, the coating machine 40 is controlled to spray the paint N toward the workpiece W that has been transported to the coating position P2 by the transport robot 20.

Here, the coating position P2 is a position where the paint N is actually sprayed onto the workpiece W from the coating machine 40. On the other hand, the pre-painting position P1 is a position before the workpiece W is transported to the painting position P2. Further, the post-painting position P3 is a position to which the workpiece W is transported after being painted at the painting position P2. Therefore, both the pre-painting position P1 and the post-painting position P3 are retracted positions with respect to the painting position P2. In this embodiment, both the pre-painting position P1 and the post-painting position P3 are higher than the painting position P2 (see FIG. 1), and are located laterally away from the painting position P2 (see FIGS. 1 and 2). ).

1. Structure of Transport Robot 20 As shown in FIGS. 1 and 2, the transport robot 20 is an articulated robot having a main body 21 and a robot arm 22 with an articulated structure extending from the main body 21. be. In this embodiment, the main body portion 21 of the transport robot 20 is provided directly below the conveyor rail 17 in the height direction Z. Although not particularly shown in the drawings, a holding mechanism capable of holding and releasing the workpiece W is provided at the arm tip of the robot arm 22 of the transport robot 20.

In this transport robot 20, the position and posture of the arm tip of the robot arm 22 are controlled. Thereby, the transport robot 20 can transport the work W along a desired path from the painting position P2 to the pre-painting position P1 and the post-painting position P3. In this embodiment, the transport robot 20 is configured to transport the workpiece W while supporting it from below.

2. Structure of Painting Robot 30 As shown in FIGS. 1 and 2, like the transport robot 20, the painting robot 30 includes a main body 31 and a robot arm 32 with an articulated structure extending from the main body 31. It is an articulated robot that has the following. In FIG. 1, the structure of the painting robot 30 is shown in a simplified manner. A coating machine 40 is fixed to the arm tip of the robot arm 32 of the coating robot 30. Although the number of painting robots 30 is not particularly limited, in this embodiment, a case is illustrated in which a plurality of painting machines 40 with different paint colors are used, and accordingly, a plurality of painting robots 30 (four in FIG. 2) are used. Two painting robots 30 are provided.

In each painting robot 30, the position and posture of the arm tip of the robot arm 32 are controlled. Thereby, each painting robot 30 can move the paint machine 40 so as to spray the paint N onto the workpiece W from a desired position and in a desired direction. In this embodiment, each painting robot 30 is configured to hold the corresponding painting machine 40 from above.

3. Transporting Operation of Workpiece W As shown in FIGS. 1 and 2, the workpiece W is first carried into the coating processing space 13a of the coating room 13 from outside the coating booth 10 by the conveyor rail 17. The transport robot 20 is controlled to pick up the workpiece W at the pre-painting position P1 on the conveyor rail 17 and transport it to the painting position P2. Thereby, the workpiece W is placed at the coating position P2. On the other hand, the coating robot 30 is controlled so that the coating machine 40 approaches the workpiece W placed at the coating position P2. Then, the surface of the workpiece W is painted with the paint N sprayed from the paint injection port (not shown) of the paint sprayer 40 held by each painting robot 30. At this time, the transport robot 20 is controlled to maintain the state in which it supports the workpiece W from below.

After finishing painting the workpiece W, the transport robot 20 is controlled to transport the workpiece W from the painting position P2 to the post-painting position P3 on the conveyor rail 17, and release the holding of the workpiece W at the post-painting position P3. Ru. Thereafter, the workpiece W is carried out from the coating processing space 13a of the coating room 13 to the outside of the coating booth 10 by the conveyor rail 17.

According to the first embodiment described above, the following effects can be obtained.

In the painting processing apparatus 1 of the first embodiment, the workpiece W is transported between the painting position P2, the pre-painting position P1, and the post-painting position P3 by the transporting robot 20 provided in the painting booth 10. The workpiece W is transported to the coating position P2 by the transport robot 20, and is painted with paint N sprayed from the coating machine 40. On the other hand, conditioned air A is supplied downward from the air supply chamber 12 to the painting processing space 13a of the painting room 13. For this reason, the paint dust D that is sprayed from the paint machine 40 at the painting position P2 and then scattered around the workpiece W without being coated on it is transferred to the downward flow of the air-conditioned air A through the painting processing space 13a in the painting booth 10. Therefore, it flows down.

Embodiment 1 is characterized in that the pre-painting position P1 and the post-painting position P3 of the workpiece W are located higher than the painting position P2 and laterally away from the painting position P2. As a result, the paint dust D generated at the painting position P2 flows down from the painting position P2 due to the fact that the pre-painting position P1 and the post-painting position P3 are higher than the painting position P2, and also due to the influence of the air-conditioned air A. For this reason, it is prevented from reaching the pre-painting position P1 and the post-painting position P3 from the painting position P2.

Therefore, it is possible to prevent the paint quality from deteriorating due to paint fogging in which the paint dust D adheres to the work W placed at the pre-painting position P1 and the post-painting position P3. That is, the paint dust D generated at the painting position P2 adheres to the workpiece W carried by the conveyor rail 17 to the pre-painting position P1, and the color of the paint at the time of painting is mixed with the color of this paint dust D, resulting in poor painting quality. can be prevented from decreasing. Further, the paint dust D generated at the painting position P2 adheres to the workpiece W before being carried out from the post-painting position P3 by the conveyor rail 17, and this paint dust D forms paint spots on the surface of the workpiece W. It is possible to prevent the coating quality from deteriorating.

Furthermore, if the pre-painting position P1 and the post-painting position P3 are set higher than the painting position P2, the painting quality will be less affected. The lateral distance can be kept small. That is, the pre-painting position P1, the post-painting position P3, and the painting position P2 can be brought as close to the horizontal direction X as possible. As a result, the painting booth 10 can be downsized, and by reducing the amount of air conditioned air A used, it is possible to improve energy saving performance.

As described above, according to the first embodiment, it is possible to provide a coating processing apparatus 1 that can achieve both coating quality and energy saving performance.

According to the coating processing apparatus 1 of the first embodiment, the transfer robot 20 supports the workpiece W from below, while the coating robot 30 holds the coating machine 40 from above. It is possible to prevent one of the painting robots 30 from interfering with the operation of the other.

According to the coating processing apparatus 1 of the first embodiment, by providing the main body 21 of the transport robot 20 directly below the conveyor rail 17, the transport distance by the transport robot 20 can be kept short. This makes it possible to shorten the cycle time required for transporting the workpiece W between the pre-painting position P1, the post-painting position P3, and the painting position P2.

Other embodiments related to the first embodiment described above will be described below with reference to the drawings. In other embodiments, the same elements as those in Embodiment 1 are given the same reference numerals, and descriptions of the same elements will be omitted.

(Embodiment 2)
As shown in FIG. 3, the painting processing apparatus 1A of the second embodiment is different from the painting processing apparatus 1 of the first embodiment in that the conveyor rail 17 is arranged higher than the painting position P2. .

The other configurations are the same as in the first embodiment.

According to the painting processing apparatus 1A of the second embodiment, by arranging the conveyor rail 17 higher than the painting position P2, it is possible to suppress the paint dust D generated at the painting position P2 from adhering to the conveyor rail 17. Thereby, the maintenance cost required for cleaning the conveyor rail 17 can be kept low.

Other than that, the same effects as in the first embodiment are achieved.

(Embodiment 3)
As shown in FIG. 4, the painting processing apparatus 1B of the third embodiment is different from the painting processing apparatus 1 of the first embodiment in that it includes an air supply chamber 19 in addition to the air supply chamber 12. As shown in FIG. The air supply chamber 19 is an air supply section that supplies conditioned air A laterally from the side wall portion 18 of the coating booth 10 to the coating processing space 13a of the coating room 13. This air supply chamber 19 is used as a second air supply section 19 when the air supply chamber 12 is used as the first air supply section 12.

The indoor space 19a of the air supply chamber 19 communicates with the indoor space 12a of the air supply chamber 12. Therefore, the conditioned air A generated by the air conditioner 50 is supplied from the air supply chamber 12 to the painting processing space 13a of the painting room 13, and is also supplied from the air supply chamber 19 to the painting processing space 13a of the painting room 13. be done. The conditioned air A supplied from the air supply chamber 19 is configured to flow from the side of the main body 21 of the transport robot 20 and the conveyor rail 17 toward the coating position P2.

The other configurations are the same as in the first embodiment.

According to the coating processing apparatus 1B of the third embodiment, the coating from the air supply chamber 19 to the coating chamber 13 prevents the coating dust D generated at the coating position P2 from adhering to the main body 21 of the transport robot 20 and the conveyor rail 17. This can be suppressed by the conditioned air supplied to the processing space 13a. Thereby, the maintenance cost required for cleaning each of the transport robot 20 and the conveyor rail 17 can be kept low.

Other than that, the same effects as in the first embodiment are achieved.

In addition, in a modification particularly related to the third embodiment, a structure in which the air supply chamber 19 of the third embodiment is added to the coating processing apparatus 1A of the second embodiment can be adopted as necessary.

The present invention is not limited to the above-described embodiments, and various applications and modifications can be made without departing from the purpose of the present invention. For example, the following embodiments that apply the above embodiments can also be implemented.

In the above-described embodiment, the case is illustrated in which the coating machine 40 is held by the coating robot 30, but instead, the coating robot 30 is omitted and the coating machine 40 is always held at the coating position P2 in the coating booth 10. A fixed structure may also be adopted. When this structure is adopted, the work W may be transported while being supported from below by the transport robot 20, or may be transported while being supported from other directions.

In the above-described embodiment, the main body 21 of the transport robot 20 is provided directly below the conveyor rail 17, but the arrangement relationship between the main body 21 and the conveyor rail 17 is not limited to this. For example, a structure in which the main body 21 of the transport robot 20 is arranged on the side of the conveyor rail 17 can also be used.

In the above embodiment, the case where the evacuation positions in the painting booth 10 are set to two positions, the pre-painting position P1 and the post-painting position P3, is illustrated, but the number of evacuation positions is not limited to this, and may be set as necessary. Depending on the situation, the number may be set to one or three or more.

In the above-mentioned embodiment, a paint treatment device used for painting automobile bodies is illustrated, but the structure of this paint treatment device can also be applied to the structure of a paint treatment device for automobile parts or the structure of a paint treatment device in other fields other than automobiles. It can also be applied to

1, 1A, 1B Paint processing equipment 10 Paint booth 11 Ceiling part 12 Air supply room (air supply part, first air supply part)
13a Painting processing space 18 Side wall portion 19 Air supply chamber (second air supply section)
20 Transport robot 21 Main body 30 Painting robot A Air-conditioned air N Paint P1 Pre-painting position (retreat position)
P2 Position after painting (retreat position)
W Work Y Horizontal direction

Claims (6)

paint booth and
a transport robot installed in the painting booth and configured to transport a workpiece between a painting position and a retreat position;
a coating machine that sprays paint toward the workpiece transferred to the coating position by the transfer robot;
an air supply unit that supplies conditioned air downward from the ceiling of the painting booth to the painting processing space;
Equipped with
The retracted position is a position higher than the painting position and laterally away from the painting position. Equipped with a coating robot that holds the coating machine from above,
2. The painting processing apparatus according to claim 1, wherein the transporting robot is configured to transport the workpiece between the retreat position and the painting position while supporting the workpiece from below. The evacuation position includes a pre-painting position before the workpiece is transported to the painting position, and a post-painting position where the workpiece is transported after being painted at the painting position,
The coating processing apparatus according to claim 1 or 2, further comprising a conveyor rail extending horizontally so as to support the workpiece at each of the pre-painting position and the post-painting position. The coating processing apparatus according to claim 3, wherein the conveyor rail is arranged at a higher location than the coating position. 4. The coating processing apparatus according to claim 3, wherein the main body of the transport robot is provided directly below the conveyor rail. When the air supply section is a first air supply section, in addition to the first air supply section, a second air supply section provided on the side wall of the painting booth is provided, and the second air supply section comprises: 6. The coating processing apparatus according to claim 5, wherein conditioned air is supplied horizontally to the coating processing space and is configured to flow from the side of the main body portion and the conveyor rail toward the coating position.

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