JP2000093860A - Coating booth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save energy by providing a zone for changing the volume of a coating chamber to be supplied with an air current in a coating booth. SOLUTION: A preparation zone, an automatic coating zone, a repairing zone and a setting zone are provided in a coating booth 1 from its inlet side. A partition wall 5 composed of four wall panels formed by connecting a front panel 51, two side-wall panels 52 following the front panel and a ceiling-wall panel 53 is provided on both sides of the repairing zone. The wall panels 51 to 53 are suspended from a rail 54 and supported in a coating chamber 11, and the tip of the rod of an air cylinder 55 is fixed, for example, on the upper end of the front panel 51. The partition wall 5 is moved to the advancing position and retreating position by driving the air cylinder 55. When the repairing zone is not used, the partition wall 5 is moved to the advancing position to decrease the volume in the coating chamber 11, and the opening degree of an air feed damper and the revolving speed of an exhaust fan are decreased at the same time. Energy is saved in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a painting booth used in a painting process of an automobile or an automobile part, and more particularly to a painting booth having a variable booth volume.

[0002]

2. Description of the Related Art In a painting booth of this kind, an automobile body mounted on a painting carriage is conveyed by a floor conveyor, and a top coat or an intermediate coat is applied by using an automatic painting machine such as a painting robot. Since the paint to be painted at this time is an atomized paint, air at a constant speed from the ceiling surface to the floor surface is supplied into the painting booth in order to prevent the paint from scattering. Further, the viscosity of the paint varies depending on the temperature, and this leads to a variation in the coating conditions. Therefore, the air supplied into the coating booth is supplied in harmony with a constant temperature.

[0003] Supply of air into the coating booth is as follows.
The conditioned air is sent from the ceiling of the painting booth by an air supply device with a temperature control function.
By exhausting air from the floor surface by the exhaust device, a constant velocity air flow is generated in the painting booth from top to bottom. As a result, the unpainted atomized paint sprayed from the coating gun and not adhered to the body is collected in the collection chamber on the floor by riding this air flow, so that the paint is transferred to the body that is transported back and forth. Color jump failure is prevented.

[0004]

In the coating booth, in addition to an automatic coating zone in which an automatic coating machine such as a coating robot is disposed, a backup when the coating machine breaks down and a periodic quality check are performed. Zone is provided.

[0005] However, since the above-mentioned air supply and exhaust are always performed in the backup zone and the check zone as well, there is a problem that the running cost of energy increases accordingly. If the air supply / exhaust device is not provided in such a zone, the function as a painting booth cannot be exhibited during use.

[0006] The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a coating booth that can save energy by making the booth volume variable.

[0007]

According to a first aspect of the present invention, there is provided a coating booth in which an airflow is provided in a coating chamber. It is characterized by having a zone in which the volume of the chamber is variable.

When an airflow at a constant speed is generated in the coating chamber, the amount of air supply and exhaust to and from the coating chamber is correlated with the volume of the coating chamber, and a small volume requires a small amount of air supply and exhaust. Therefore,
If the volume of the coating room is made variable as in the coating booth according to claim 1, the required amount of air is supplied and exhausted only in the zone where air supply and exhaust is required and when necessary, and the volume of the coating room is reduced when unnecessary. By doing so, the supply / exhaust amount can also be reduced. As a result, the energy required for air supply and exhaust in a zone that is not always used can be reduced.

(2) In a coating booth according to a second aspect of the present invention, an opening area of the ceiling surface is variable in a coating booth in which air is supplied from a ceiling surface into a coating room. Characterized in that it has a zone.

[0010] The supply and exhaust of the coating room is usually realized by the supply of air from the ceiling and the exhaust from the floor. The amount of air supply to the room can be suppressed. Therefore, by making the opening area of the ceiling surface variable as in the coating booth according to the second aspect, the required amount of air supply and exhaust is performed only in the zone where air supply and exhaust is required and when necessary. By reducing the opening area of the ceiling surface, the amount of air supply and exhaust can be reduced. As a result, the energy required for air supply and exhaust in a zone that is not always used can be reduced.

(3) Further, in the coating booth according to the third aspect of the present invention, in the coating booth in which the air in the coating chamber is exhausted from the floor, the opening area of the floor is variable. Characterized in that it has a zone.

As described above, the supply and exhaust of the coating room is normally realized by the supply of air from the ceiling surface and the exhaust from the floor surface. As a result, the amount of exhaust air to the coating room can be suppressed. Therefore, by making the opening area of the floor surface variable as in the coating booth according to the third aspect, the necessary amount of air supply and exhaust is performed only in the zone where air supply and exhaust is required and when necessary. By reducing the opening area of the floor surface, the amount of air supply and exhaust can also be reduced. As a result, the energy required for air supply and exhaust in a zone that is not always used can be reduced.

(4) In the coating booth according to the first to third aspects, specific means for varying the volume in the coating chamber, the opening area on the ceiling surface, or the opening area on the floor surface is not particularly limited. The following can be mentioned as an example.

That is, the coating booth according to claim 4 is
In a coating booth in which an airflow is given to a coating chamber in which a workpiece is transported, at least a part of an area other than a transport area of the workpiece in the coating chamber is partitioned, and a volume of the coating chamber in this zone, a ceiling surface, And at least two positions for increasing or decreasing at least one of the opening area of the floor surface and the opening area of the floor surface.

[0015] At least a part of the coating chamber other than the transporting area of the object to be coated may or may not be used as a coating chamber as necessary. Therefore, a partition wall body is provided in such a zone, and the partition wall body can be moved to at least two positions that increase or decrease at least one of the coating room volume, the opening area of the ceiling surface, and the opening area of the floor surface. .

When the partition wall is moved to a position where at least one of the volume of the coating room, the opening area of the ceiling surface and the opening area of the floor surface is reduced, the interior partitioned by the partition wall is substantially reduced. Since it is outside the coating room, the amount of air supply and exhaust can be reduced by that much, and the energy required for air supply and exhaust when this zone is not used can be reduced.

On the other hand, when this zone is used, the partition wall is moved to a position where at least one of the coating room volume, the opening area of the ceiling surface, and the opening area of the floor surface increases. As a result, a necessary work space is secured in the coating room, and a constant supply and exhaust is performed, so that repair painting and other various painting operations can be performed.

(5) In the coating booth according to the fourth aspect, the specific structure of the partition wall is not particularly limited, and at least one of the volume of the coating room, the opening area of the ceiling surface, and the opening area of the floor surface is increased or decreased. Any structure may be used.

As one example, the coating booth according to claim 5, wherein the partition wall includes at least a front wall surface facing the object to be coated, both side wall surfaces continuous with the front wall surface, and a ceiling of the coating room. It is characterized by including a ceiling wall surface facing the surface and rail means for suspending these wall surfaces in the coating room.

By enclosing the front wall surface, the ceiling wall surface, and the four wall surfaces on both sides, and moving this along the rail means, the coating room volume, the opening area of the ceiling surface, and the opening area of the floor surface are all reduced. Can be increased or decreased.

(6) In the coating booth according to the fourth and fifth aspects, there is no particular limitation, and the partition wall may be moved manually. It is preferable to further have an actuator for moving forward and backward along the rail means. This is because the movement of the partition wall can be automated as needed.

(7) In the above invention, although not particularly limited, the flow rate of the airflow in the coating chamber may be controlled according to the moving position of the partition wall as in the coating booth according to the seventh aspect. preferable.

When the partition wall is moved to a position where at least one of the volume of the coating room, the opening area of the ceiling surface, and the opening area of the floor surface is reduced, the flow rate of the airflow in the coating room is reduced while the ceiling is reduced. When the partition wall is moved to a position where at least one of the opening area of the surface and the opening area of the floor increases, the flow rate of the airflow in the coating chamber is increased to a certain amount. As a result, the energy required for air supply and exhaust when this zone is not used can be reduced.

(8) The zone to which the present invention is applied is not particularly limited, and can be applied to, for example, a repair painting process. The repair painting process here includes a hand-blown painting process, an inspection process, a backup process of an automatic painting machine, and the like.

[0025]

According to the first to fourth and eighth aspects of the present invention, a required amount of air is supplied / exhausted only in a zone where air supply / exhaust is required and when necessary. In addition, energy required for air supply and exhaust in a zone that is not always used can be reduced.

In addition to the above, according to the fifth aspect of the present invention, the four wall surfaces of the front wall surface, the ceiling wall surface and both side wall surfaces are surrounded,
Since this is moved back and forth along the rail means, any of the coating room volume, the opening area of the ceiling surface, and the opening area of the floor surface can be increased or decreased, and the above-described reduction of the supply / exhaust amount can be effectively realized. .

Further, according to the invention of claim 6, the movement of the partition wall can be automated as required.

Further, according to the invention of claim 7, it is possible to effectively reduce the supply / exhaust energy of the zone which is not always used.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view showing an embodiment of the coating booth of the present invention, FIG. 2 is an enlarged plan view showing a main part (repair coating process) of FIG. 1, FIG. 3 is a sectional view taken along the line III-III of FIG. 4 is an enlarged sectional view showing the main part of FIG. 1 (when the partition wall is retracted), FIG. 5 is a front view of the main part showing another embodiment of the coating booth of the present invention, and FIG. It is sectional drawing which follows the VI line.

The painting booth 1 of this embodiment has a floor surface 1
3, a floor conveyor 3 is laid, and as shown in FIGS. 3 and 6, an automobile body B, which is an object to be coated, is transported in the coating room 11 of the coating booth 1 while being mounted on a coating cart 21. . In FIG. 1, the left side is the entrance of the coating booth 1, and although not shown, the right setting zone 1D
Is provided with a coating drying oven.

The coating booth 1 is, for example, a coating booth used in a top coating process, and is set as a preparation zone 1A, an automatic coating zone 1B, a repair zone 1C, and a setting zone 1D from the entrance side.

The preparation zone 1A is a process for preparing before the top coating. For example, the cleaning of the body B by air blow or the input of data of the coating specification of each body B to the coating robot 4 is performed. .

The automatic painting zone 1B is a step of applying a paint to each body B by using a plurality of painting robots 4 provided, and each painting robot 4 follows a teaching locus according to the painting specification of each body B. By operating, the top coat is appropriately applied.

The repair zone 1C corresponds to the repair coating process of the present invention, and includes a regular coating quality check process,
It is used as a hand-blown painting process when the painting robot 4 is out of order, or as a hand-blown painting process for the body B with special specifications. However, most of the operating hours are unused zones.

A setting zone 1D located between the coating booth 1 and a coating drying oven (not shown) is a step for adjusting the state of the wet coating applied by the coating robot 4, and is usually provided in the wet coating. This is a zone for evaporating a part of the contained solvent to obtain a dried coating film of a predetermined quality. However, this is a zone in which the body B on which the wet coating film is formed simply passes for a predetermined time, and no special processing is performed.

As shown in the cross-sectional view of FIG. 3, the coating booth 1 of this embodiment has a panel 14 formed in a tunnel shape.
And at least the automatic coating zone 1B and the repair zone 1
Pits 15 formed in zone C,
A ceiling filter is provided on a ceiling surface 12 therein, and a floorboard (sunoko) is provided on a floor surface 13. The coating room 11 is formed between the ceiling surface 12 provided with the ceiling filters and the floor surface 13 provided with the sash.

Between the ceiling surface 12 and the panel ceiling, an air supply duct 16 for guiding conditioned air from an air supply device 23 shown in FIG. 6 and rectifying the conditioned air sent from the air supply duct 16. A rectifying chamber 17 is provided, and the conditioned air rectified in the rectifying chamber 17 passes through the ceiling filter 12 and is blown downward to the coating chamber 11. As shown in FIG. 6, between the automatic coating zone 1B and the repair zone 1C of the air supply duct 16, an air supply damper 18 for adjusting the flow rate of conditioned air passing therethrough is provided. Increasing the degree of opening of the air supply damper 18 increases the amount of conditioned air blown into the coating chamber 11 of the repair zone 1C, and decreasing the degree of opening decreases the amount of conditioned air blown into the coating chamber 11 of the repair zone 1C. .

The pit 15 below the siding provided on the floor 13 is used as a scattered paint collecting chamber 19, and when the water overflowing from the gutter 20 flows through the collecting plate 21, the scattered paint is captured by the pit 15. After being collected at 15, the wastewater is sent to a wastewater treatment device (not shown). As shown in FIG. 6, each of the zones 1 </ b> A to 1 </ b> D of the collection chamber 19 has an exhaust device 22.
The conditioned air flowing down to the collection chamber 19 after passing through the coating chamber 11 is exhausted to the outside of the system after heat recovery. In addition, at least the fan of the exhaust device 22 provided in the repair zone 1C is configured to be driven by inverter control. Increase
When the number of revolutions of the fan is reduced, the amount of exhaust from the coating chamber 11 in the repair zone 1C is reduced.

In particular, in this embodiment, partition walls 5 are provided on both sides of the repair zone 1C. This partition wall 5 is a front wall panel 5 facing the body B.
1, two side wall panels 52 continuous with the front wall panel 51, and a ceiling wall panel 53 facing the ceiling surface 12.
, And these are connected to each other. The front wall panel 51 is formed of, for example, a galvanized plate or a stainless plate,
The side wall panel 52 and the ceiling panel 53 are formed of, for example, a flame-retardant canvas. Of these, the two side wall panels 52, 52 and the ceiling wall panel 53 are formed to be foldable like a so-called accordion curtain, as shown in FIGS.

The four wall panels 51, 52, 53 of the partition wall body 5 configured as described above are suspended from the rails 54 and are supported by the coating chamber 11. It is fixed to the upper end of the wall panel 51. Thus, by driving the air cylinder 55, the partition wall 5 can move to the forward position shown in FIGS. 2 and 3 and the retracted position shown in FIG.

As shown in FIGS. 2 and 4, an entrance 24 for an operator to enter and exit the coating room 11 of the repair zone 1C is provided in the front wall panel 51 of the partition wall 5. When the worker enters the repair zone 1C to perform work, the entrance 56 of the front wall panel 51 is opened as shown in FIG.

Next, the operation will be described. First, when the painting robot 4 and the like operate normally and there is no need for periodic quality checks, and thus it is not necessary to use the repair zone 1C, the partition wall 5 is moved to the position shown in FIGS. Move. This operation is automatically performed by advancing the rod of the air cylinder 55. At the same time,
The opening degree of the air supply damper 18 shown in FIG. 6 is reduced, and the rotation speed of the fan of the exhaust device provided in the repair zone 1C is reduced. The entrance 56 of the partition wall 5 is closed.

When the partition wall 5 is moved as shown in the figure, the volume of the coating chamber 11 in the repair zone 1C is reduced by that much. Further, the ceiling surface 12 and the floor surface 13 are closed only in a region where the partition wall body 5 has advanced, and the opening area of each of the ceiling surface 12 and the floor surface 13 decreases. In other words, the conditioned air flowing down from the top to the bottom in the coating chamber 11 flows only in the vicinity where the body B is conveyed. Therefore, even if the flow velocity here is made equal to another zone, for example, the automatic coating zone 1B. In addition, the flow rate of conditioned air can be significantly reduced. Therefore, the running cost can be reduced as much as the driving power of the air supply device 23 and the exhaust device 22 can be reduced.

On the other hand, when the painting robot 4 is out of order or when performing a periodic quality check, it is necessary for the worker H to enter the repair zone 1C to perform hand-blown painting or visual check. At this time, the rod of the air cylinder 55 is retracted, and the partition wall 5 is moved to the position shown in FIG. At the same time, the air supply damper 1 shown in FIG.
8, and the rotation speed of the fan of the exhaust device provided in the repair zone 1C is increased. In addition,
For the entrance and exit of the worker H, the entrance 24 of the coating booth 1 and the entrance 56 of the partition wall 5 are used.

When the partition wall 5 is moved as shown in the figure, a work space is secured on both sides of the body B conveyed in the repair zone 1C, and an appropriate work can be performed here. Further, even in the case of performing a painting operation such as hand-blown painting, the conditioned air from the air supply device 23 is sufficiently supplied to the painting chamber 11, so that the same wind speed as in other zones is ensured, and the paint is scattered. Can be prevented.

The embodiments described above are described for facilitating the understanding of the present invention, but are not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

For example, as an actuator for automatically moving the partition wall 5, a ball screw mechanism 57 having a ball screw and a motor as shown in FIG. Can be.

In the above-described embodiment, the partition wall 5 is provided in the repair zone 1C which is not always used. However, the present invention is not limited to this, and the partition wall is provided in the painting booth having the hand-blown coating zone. Alternatively, it may be used for energy saving in a hand-blown coating zone that is not used due to a decrease in the production volume.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a painting booth of the present invention.

FIG. 2 is an enlarged plan view showing a main part of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is an enlarged sectional view showing a main part of FIG. 1 (when the partition wall is retracted).

FIG. 5 is a main part front view showing another embodiment of the coating booth of the present invention.

FIG. 6 is a sectional view taken along the line VI-VI of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Painting booth (1A ... Preparation zone, 1B ... Automatic painting zone, 1C ... Repair zone, 1D ... Setting zone) 11 ... Painting room 12 ... Ceiling surface 13 ... Floor surface 3 ... Floor conveyor 4 ... Painting robot 5 ... Partition wall Body 51: Front wall panel 52: Side wall panel 53: Ceiling panel 54: Rail (rail means) 55: Air cylinder (actuator) 57: Ball screw mechanism (actuator) B: Body (substrate)

Claims (8)

[Claims] 1. A coating booth in which an airflow is provided in a coating chamber, wherein the coating booth has a zone in which the volume of the coating chamber is variable. 2. A coating booth in which air is supplied from a ceiling surface into a coating room, wherein the coating booth has a zone in which an opening area of the ceiling surface is variable. 3. A coating booth in which air in a coating chamber is exhausted from a floor surface, wherein the coating booth has a zone in which an opening area of the floor surface is variable. 4. A coating booth in which an airflow is applied to a coating chamber in which an object to be coated is transferred, wherein at least a part of a region other than a transfer area of the object to be coated in the coating chamber is partitioned, and coating in this zone is performed. A coating booth having a partition wall movably provided at least at two positions for increasing or decreasing at least one of a room volume, a ceiling opening area, and a floor opening area. 5. The partition wall body includes at least a front wall surface facing the object to be coated, both side wall surfaces continuous with the front wall surface, a ceiling wall surface facing the ceiling surface of the coating room, and these wall surfaces. The coating booth according to claim 4, further comprising rail means suspended from the coating room. 6. The coating booth according to claim 5, further comprising an actuator for moving said wall surface forward and backward along said rail means. 7. The coating booth according to claim 4, wherein the flow rate of the airflow in the coating chamber is controlled according to the moving position of the partition wall. 8. The coating booth according to claim 1, wherein said zone is a repair painting step.