JP3023154B2 - Coating method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention is used for a coating method of performing baking treatment after coating an object to be coated conveyed along a coating line, and used in the coating method. Related to a coating device.

(Prior art) A coating method of baking after coating an object to be conveyed along a coating line, regardless of the type of the coating such as undercoating, intermediate coating or topcoating. A coating step in which an object to be coated is usually applied a plurality of times while the object is being conveyed by a coating conveyor, and the object coated in the coating step is baked on a conveyor for baking. And a baking step of performing a baking process on the object to be coated while being transported.

Further, as a coating device used in the above coating method,
A coating zone in which the object to be coated is coated a plurality of times while the object is being conveyed by a coating conveyor, and a baking zone in which the object coated in the coating zone is baked while being conveyed by a baking conveyor. In a painting zone, painting is usually performed by spraying a mist-like paint on an object using an automatic painting machine or a painting robot.

If a failure occurred in the automatic painting machine, painting robot or painting conveyor disposed in the painting zone, the painting line, that is, the painting conveyor, and all automatic painting machines or painting robots were stopped. After that, the failed automatic coating machine, painting robot or painting conveyor was restored, and then the operation of the painting conveyor was started.
The painting and baking process on the object has been resumed.

(Problems to be Solved by the Invention) However, in the above-described coating method or coating apparatus, when the whole of the coating line is stopped when the above-described failure occurs in the coating line, the object to be coated during the coating is stopped. Since unevenness of paint or dripping of paint occurs on the painted surface, which leads to deterioration of the quality of the object to be coated, the painted surface must be corrected by sanding or the like.

In particular, when the above-mentioned failure occurs when a clear coating surface of a thick film is formed on the surface of the object by performing a plurality of clear coatings on the object to be coated, the sharpness of the coated surface is reduced. Since it is lowered, the clear painted surface formed in the painting process before the final painting is completely sanded and shaved off, and a plurality of clear paintings must be performed from the beginning.

In view of the above, the main object of the present invention is to reduce paint unevenness or paint dripping that occurs on a painted surface of a workpiece even when a failure occurs in a coating line, and to paint the workpiece by sanding or the like. An object of the present invention is to reduce the number of times of correcting a surface.

(Means for Solving the Problems) In order to achieve the above object, the invention according to claim (1) is directed to a first coating zone for performing coating up to a final coating and a second coating zone for performing final coating. While the coating conveyor is divided between the coating zone and the coating zone, the coating conveyor installed in the second coating zone is connected to the baking conveyor installed in the baking zone. If this occurs, the operation of the conveyor in the first coating zone is stopped while the operation of the conveyor in the second coating zone is continued. Further, the object to be coated is placed on a carriage and transported, and the carriage is provided with two types of engaging members capable of engaging with the conveyors of the first and second coating zones, respectively. In the engagement state between one and the first painting zone conveyor, the other is in the disengaged state with the second painting zone conveyor, and in the disengaged state between one and the first painting zone conveyor, By bringing the other into engagement with the conveyor in the second coating zone, the object to be coated in the first coating zone is subjected to the final coating and baking process as in the normal state. In addition, when the operation of the conveyor in the first coating zone is stopped, the object to be coated is reliably sent to the conveyor in the second coating zone.

Specifically, a solution taken by the invention of claim (1) is a coating method for carrying a plurality of coatings on an object to be coated while being conveyed by a coating conveyor while being mounted on a cart. A baking zone provided in front of the coating zone in the transport direction of the coating zone and transporting the coated workpiece placed on the carriage by a baking conveyor and performing a baking process on the coated workpiece. It is intended for coating equipment with zones.

The coating conveyor includes a first conveyor arranged in a first coating zone for performing coating up to the last time on the object to be coated in the coating zone, and a downstream side of the first coating zone. And a second conveyor arranged in the second conveyor so that the object to be coated conveyed by the second conveyor with respect to the baking conveyor is continuously conveyed by the baking conveyor. It is installed continuously.

Further, the carriage has a rear engagement member for engaging with the first conveyor and causing the carriage to travel by the first conveyor, and a rear engagement member disposed forward of the rear engagement member in the transport direction. A front engagement member that engages with the second conveyor, and when the rear engagement member is engaged with the first conveyor, the front engagement member engages with the second conveyor. On the other hand, when the front engagement member engages with the second conveyor, the engagement between the rear engagement member and the first conveyor is released.

When a failure occurs in the first coating zone,
A control means for stopping the operation of the first conveyor and continuing the operation of the second conveyor is provided.

In the invention of claim (2), when a plurality of clear coatings are performed on an object to be coated, the clear coating surface already formed by the clear coating before the final coating is completely removed and corrected. In order to avoid the situation, even if a failure occurs in the first coating zone, the final clear coating and baking process are performed as normal for the workpieces that have been cleared before the final coating. It is what you do.

Furthermore, the invention of claim (3) is a coating method performed by using the invention of claim (1). Specifically, the invention is directed to a coating method in which an object to be coated is conveyed through a coating zone while being placed on a cart. A coating step of performing coating on the object a plurality of times, and a baking step of performing a baking process on the object to be transferred on the carriage after being painted in the coating zone and placed on the carriage. And coating methods including:

The coating step includes a first coating step of coating the object to be coated before the final round while conveying the object to be coated on the first conveyor, and a first coating step. A second coating step is performed in which the object to be coated is conveyed by the second conveyor downstream of the first conveyor, and a final coating is performed on the object to be coated.

The bogie has the first conveyor engaged with the first conveyor.
And a rear engaging member for traveling the carriage by the conveyor, and the rear engaging member is disposed forward of the rear engaging member in the transport direction, and the engagement of the rear engaging member with the first conveyor is released. A front engagement member that is engaged with the second conveyor when the rear engagement member is engaged with the first conveyor and the engagement with the second conveyor is released when the rear engagement member is engaged with the first conveyor. In the first painting step, the carriage is transported by the first conveyor in a state where the rear engagement member and the first conveyor are engaged, and in the second painting step, the carriage is connected to the front engagement member. The carriage is transported by the second conveyor in a state where the carriage is engaged with the second conveyor.

Then, when a failure occurs in the first painting process,
A configuration in which the operation of the first conveyor is stopped, the operation of the second conveyor is continued, and the coating and baking process is performed on the object being conveyed by the second conveyor. Is what you do.

(Operation) According to the configuration of the invention of claim (1), the coating conveyor is a first conveyor arranged in the first coating zone, and a second conveyor arranged downstream of the first coating zone. And the second conveyor is connected to the baking conveyor so that the object to be coated conveyed by the second conveyor is continuously conveyed by the baking conveyor. When a failure occurs in a zone,
Since the control means for stopping the operation of the first conveyor and continuing the operation of the second conveyor is provided, even if a failure occurs in the first painting zone, the painting work in the first painting zone can be performed. The completed object is conveyed normally by the second conveyor, and the final coating and baking process is performed.

The article to be coated is conveyed on the first and second conveyors while being placed on the cart. At this time, the carriage has a rear engagement member for engaging with the first conveyor and causing the carriage to travel by the conveyor, and a rear engagement member disposed forward of the rear engagement member in the transport direction. A front engagement member is provided for engaging the second conveyor, and when the rear engagement member is engaged with the first conveyor, the engagement between the front engagement member and the second conveyor is provided. On the other hand, when the front engagement member is engaged with the second conveyor, the engagement between the rear engagement member and the first conveyor is released. Even when a failure occurs in the first painting zone and the conveyance of the first conveyor is stopped during the conveyance from the conveyor to the second conveyor, the engagement member and the second conveyor are engaged. If they do, the engagement between the rear engagement member and the first conveyor is released. For this reason, it is possible to prevent the cart from simultaneously engaging with the first conveyor and not being transported by the second conveyor, and to reliably transport the object to be coated by the second conveyor.

Further, if the rear engagement member is engaged with the first conveyor, the front engagement member is not engaged with the second conveyor. For this reason, for example, since the painting operation of the object to be coated is not completed in the first painting zone,
When the conveyor is in the engaged state, the carriage is not transported by the second conveyor due to the engagement between the front engagement member and the second conveyor, and the transport of the object to be coated to the downstream side is performed. Can be prevented.

According to the configuration of the invention of claim (2), when a plurality of clear coatings are performed on an object to be coated, the object to be coated which has been subjected to the clear coating up to the last time is processed as normal in the final time. The clear coating and baking process are applied, so that even if a failure occurs in the coating zone where the coating is performed up to the last time, avoid the situation where the already formed clear coating film is completely removed and corrected. be able to.

According to the configuration of the invention of claim (3), the coating step includes a first coating step of performing the coating up to a time before the final round while conveying the object to be coated on the first conveyor, and And a second coating step of performing the final coating while being conveyed by the second conveyor. When a failure occurs in the first coating step, the operation of the first conveyor is stopped while the second coating step is stopped. Since the operation of the conveyor is continued and the final coating and baking process is performed, even if a failure occurs in the first coating zone, the coating in the first coating zone is performed as in the invention of claim (1). The work to be completed is subjected to the final coating and baking process as normal.

Further, in the first painting step, the carriage is engaged by the first conveyor with the rear engagement member of the carriage and the first conveyor and the engagement between the front engagement member and the second conveyor is released. On the other hand, in the second painting step, the cart is disengaged by the second conveyor from the rear engagement member and the first conveyor, and the carriage is disengaged from the front engagement member by the second conveyor. It is transported in a state where it is engaged with the conveyor. Therefore, similarly to the invention of claim (1), when a failure occurs in the first coating zone and the conveyance of the first conveyor is stopped, the bogie engages with the first conveyor and the second conveyor is engaged. The object to be coated can be reliably conveyed by the second conveyor while preventing the object from being conveyed by the second conveyer. When the conveyor is engaged with the conveyor, the object to be coated can be prevented from being transported to the downstream side.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view of a coating apparatus according to an embodiment of the present invention, which is applied to a body as an object to be coated which is transported by a cart 10 from left to right in FIG. A first coating zone 12 for performing a first clear coating as a coating before the final coating, and a first clear coating provided in front of the first coating zone 12 in the transport direction. A second coating zone 14 for performing a second clear coating as a final coating on the vehicle body, and a second clear coating provided in front of the second coating zone 12 in the transport direction. A baking zone 16 for performing a baking process on the vehicle body is provided.

The first coating zone 12 is provided with a coating robot 18 and a first mini-bell type automatic coating machine 20 on the side of the traveling carriage 10, respectively. After the intermediate-coated body is removed from the inside and outside of the body by a cleaning means such as an air blow, the body is transferred to a first painting zone 12 by a trolley 10, and the first painted zone 12 is used for painting. The first clear coating is performed by the robot 18 and the first mini-bell type automatic coating machine 20. As the first clear coating, a method of applying, for example, a high-solid clear coating to a vehicle body so as to form a coating film of 40 μm is adopted.

The second coating zone 14 is provided with a second mini-bell type automatic coating machine 21 on the side of the traveling cart 10. In the second coating zone 14, the first clear coating is performed on the vehicle body. A second clear coating is applied. As the second clear coating, as in the first coating zone 12, a method of applying a high-solid clear coating so as to form a coating film of 40 μm is adopted.
An 80 μm clear coating is formed.

In addition, instead of the above-mentioned coating method, 20
A coating film having a thickness of μm may be formed, and a coating film having a thickness of 60 μm may be formed in the second coating zone 14, or different types of coating materials may be applied in the first coating zone 12 and the second coating zone 14.

The baking zone 16 is provided with a tunnel-shaped drying oven having a suitable heating means. In the baking zone, the baking is performed by heating the painted surface of the vehicle body which has been subjected to the second clear coating at a suitable temperature atmosphere. Processing is performed.

FIG. 2 shows the trolley 10 and the longitudinal side structure of the drive mechanism for driving the trolley 10, and FIG. 3 shows the trolley 10 and the longitudinal back structure of the drive mechanism, respectively.

As shown in FIG. 2 or FIG. 3, columns 22 are erected at appropriate intervals on both left and right sides at the bottom of the pit.
The support column 22 supports a pair of left and right rails 26 via a rail support member 24 extending at the upper end in the transport direction.
On the other hand, wheels 28 are attached to the front and rear portions on both sides of the bogie 10, and the bogie 10 can run on the rails 26 by the wheels 28.

A front support 34 and a rear support 36 are erected at both front and rear ends of the bogie 10, respectively, and the vehicle body B is connected via a front support shaft 38 and a rear support shaft 40 rotatably supported by the front and rear supports 34, 36. Supported rotatably. The upper vertical bevel gear 42A and the upper horizontal bevel gear 42B disposed at the upper part in the rear support 36, the lower horizontal bevel gear 44A and the lower vertical bevel gear 44B disposed at the lower part within the rear support 36, and A vertical shaft 46 connecting the horizontal bevel gear 42B and the lower vertical bevel gear 44A; a horizontal shaft 50 holding the lower vertical bevel gear 44B; a sprocket wheel 52 fixed to an end of the horizontal shaft 50; and a chain storage box.
An endless chain for rotation 56 housed in the sprocket wheel 52 and housed in 54 constitutes a vehicle body rotation mechanism, and the vehicle body B can rotate about the transport direction as a center axis by the vehicle body rotation mechanism. In this case, the endless chain for rotation 56 is installed only at a place where the vehicle body B needs to be rotated, and when performing a thick film coating that causes paint dripping in the normal coating on the vehicle body B, In order to prevent paint dripping on the surface of the vehicle body B, painting or baking is performed while rotating the vehicle body B.

As shown in FIG. 1, as a feature of the coating apparatus according to the present embodiment, a first conveyor 60 is provided in the first coating zone 12,
A second conveyor 62 is disposed in the second coating zone 14 and the baking zone 16, and a transfer conveyor 64 is disposed between the first conveyor 60 and the second conveyor 62. In this embodiment, the second conveyor 62 and the transfer conveyor 64 constitute a "second conveyor" according to the present invention. The cart 10 is towed by the first conveyor 60 in the first coating zone 12 and travels, and is towed by the second conveyor 62 in the second coating zone 14 and the baking zone 16 to travel. Painting zone 12 and second painting zone
Between the first conveyor 60 and the second conveyor 62, the vehicle travels while being pulled by the transfer conveyor 64.

As shown in FIGS. 1 to 3, the first conveyor 60
A pair of sprocket wheels 66 arranged before and after in the transport direction, an endless first towing chain 68 spanned between the pair of sprocket wheel wheels 66, and a proper position of the first towing chain 68 It comprises a pair of clamp members 70 attached. Then, a pair of clamp members 70
Is engaged with a U-shaped traction engagement member 72 (rear engagement member) provided below the inside of the wheel 28 at the front of the bogie 10,
The carriage 10 travels in the first painting zone 12.

The second conveyor 62 also has the same structure as the first conveyor 60, and the clamp members (not shown) of the second conveyor 62 engage with the engagement members 72 of the cart 10. Then, the carriage 10 is moved to the second painting zone 12 and the baking zone 16
To travel.

Further, the transfer conveyor 64 includes a pair of sprocket wheels 72, 72 arranged in front and rear in the transport direction, an endless transfer chain 74 erected between the pair of sprocket wheels 72, 72, and An inverted L-shaped traction member 76 attached to the connecting chain 74. A U-shaped transfer engagement member is provided in which the transfer traction member 76 protrudes from the lower surface of the front end of the bogie 10 (forward from the traction engagement member 72 in the transport direction).
When engaged with 78 (front side engaging member), the bogie 10
Drive 14

In this case, the towing engaging member 72 and the transfer engaging member 78 are connected by a link member 80, and when the clamp member 70 engages with the towing engaging member 72, the towing member 76 and the connecting member are connected. When the engagement with the joining member 78 is released and the engagement between the clamp member 70 and the traction engagement member 72 is released, the traction member 76 and the connecting engagement member 78 are configured to be engaged. ing. As a result, the carriage 10 moves the first coating zone 12 to the first conveyor.
After being pulled and transported by 60, the transfer zone 14 is pulled and transported by the transfer conveyor 64, and then the second painting zone 12 and the baking zone 16 are transported by being pulled by the second conveyor 62. Is done.

Referring again to FIG. 1, reference numeral 82 denotes a first drive source for rotating one sprocket wheel 66 of the first conveyor 60, and reference numeral 84 denotes a second drive source for rotating one sprocket wheel 72 of the transfer conveyor 64. A drive source 86 is a third drive source for rotating one sprocket wheel wheel 88 of the second conveyor 62.

In FIG. 1, reference numeral 90 denotes control means. The control means 90 controls the coating robot 18 of the first coating zone 12, the second mini-bell type automatic coating machine 20, and the second coating zone 14.
From the mini-bell type automatic coating machine 21, these coating machines 18, 20, 21
Receiving a normal signal indicating that the operation state of the robot is normal or an abnormal signal indicating that it is abnormal, the painting robot 18
1. The second mini-bell type automatic coating machines 20, 21 and the first to third drive sources 82, 84, 86 are controlled as follows.

That is, the control means 90 controls the painting robot 18, the first and second
Since there is no particular problem while receiving normal signals from all of the mini-bell type automatic coating machines 20, 21, the coating robot 18,
The operation of the first and second mini-bell type automatic coating machines 20, 21 and the first to third drive sources 82, 84, 86 is continued.

When the control means 90 receives an abnormal signal from the coating robot 18 or the first mini-bell type automatic coating machine 20, the coating robot 18, the first mini-bell type automatic coating machine 20 and the first drive source
While the operation of 82 is stopped, the operations of the second and third drive sources 84 and 86 and the second mini-bell type automatic coating machine 21 are continued.

In this way, all the painting work on the vehicle body B located in the first painting zone 12 is stopped, so that the painting robot 18 or the mini-bell type automatic painting machine 20 in which the abnormality has occurred can be repaired, The vehicle passing through the painting zone 12, that is, the vehicle having completed the first clear coating, is transferred by the transfer conveyor 64 and the second conveyor 62 to the second
Are transferred through the coating zone 14 and the baking zone 16, and a predetermined operation is performed in each of the zones 14 and 16.

Therefore, even if a failure occurs in the first coating zone 12, the first
The body B, which has been completely painted in the painting zone 12, is subjected to the second clear painting and baking zone in the second painting zone 14.
Since the baking process in step 16 is performed as usual, paint unevenness or paint dripping does not occur on the surface of the vehicle body B, so that the number of times of repair by sanding is reduced.

In particular, as described above, the clear coating of a thick film is formed on the surface of the vehicle body by performing the clear coating on the surface of the vehicle body B a plurality of times while rotating the vehicle body B being transported around the transport direction as the central axis. In the case of employing the coating method, the second clear coating and baking process are continuously performed on the vehicle body B on which the first clear coating is completed. For this reason, because of a failure that occurred in the coating process (first clear coating) before the second coating zone 14 zone where the final coating process (second clear coating) is performed, the already formed coating has been formed. This avoids having to completely remove the clear painted surface.

On the other hand, when the control means 90 receives an abnormality signal from the second mini-bell type automatic coating machine 21, an abnormality has occurred in the second coating zone. Machines 20, 21 and first to third drive sources 82, 84, 86
Stop the operation of.

Further, the lower part of the carriage 10 has the first conveyor
The truck is engaged with the clamp member 70 of the
10, a towing engagement member 72 (rear side engagement member) for traveling the vehicle, and a transit towing member 76 of the transit conveyor 64 which is disposed forward of the towing engagement member 72 in the transport direction. When the towing engagement member 72 is engaged with the clamp member 70 of the first conveyor 60, the transfer engagement member 78 (front side engagement member) is provided. Joint engagement member
While the engagement between the transfer conveyor 78 and the transfer traction member 76 of the transfer conveyor 64 is released, the transfer engagement member 78 is engaged with the transfer traction member 76 of the transfer conveyor 64. Then, the engagement between the towing engagement member 72 and the clamp member 70 of the first conveyor 60 is released. Therefore, even if a failure occurs in the first coating zone 12 and the conveyance of the first conveyor 60 is stopped while the carriage 10 is being conveyed from the first conveyor 60 to the transfer conveyor 64, Transit engagement member 78
Is engaged with the transfer traction member 76 of the transfer conveyor 64, the engagement between the traction engagement member 72 and the clamp member 70 of the first conveyor 60 is released. Accordingly, it is possible to prevent the carriage 10 from being simultaneously engaged with the first conveyor 60 and being prevented from being conveyed by the transfer conveyor 64, and the vehicle body B (object to be coated) can be surely transferred by the transfer conveyor 64. Can be transported.

Further, when the towing engagement member 72 and the clamp member 70 of the first conveyor 60 are engaged, the transfer engagement member 78
And the transit traction member 76 of the transit conveyor 64 are not engaged. For example, since the painting of the vehicle body B is not completed in the first painting zone 12, the traction engaging member 72 and the first When the clamp member 70 of the conveyor 60 is in the engaged state, the transfer engaging member 78 and the transfer traction member 76 of the transfer conveyor 64 are engaged, and the bogie 10 is moved by the transfer conveyor 64. It is not conveyed, and the conveyance to the downstream side of the vehicle body B can be prevented.

In the above-described embodiment, the transfer conveyor 64 is provided between the first conveyor 60 and the second conveyor 62. Alternatively, the vehicle body B may be replaced without the transfer conveyor 64. The first conveyor 60 may be directly transferred to the second conveyor 62 so that the second coating zone 14 and the baking zone 16 are transported by the second conveyor 62.

In the above-described embodiment, the vehicle B is transported by the second conveyor 62 to the second coating zone 14 and the baking zone 16. However, the second conveyor 62 is replaced by the second coating zone. The car body B is divided into a zone conveyor and a baking zone conveyor, and the car body B is conveyed to the second painting zone 14 by the second painting zone conveyor, and the baking zone 16 is conveyed by the baking zone conveyor. From the second coating zone conveyor may be conveyed on the baking zone conveyor.

(Effect of the Invention) As described above, according to the invention of claim (1),
When the object to be coated is transported by the coating conveyor while being placed on the trolley, the coating conveyor includes a first conveyor disposed in the first coating zone and a second conveyor disposed downstream of the first coating zone. And a control means for stopping the operation of the first conveyor and continuing the operation of the second conveyor when a failure occurs in the first coating zone. Even if a failure occurs in the zone, the work to be coated in the first coating zone has been completed and is conveyed normally by the second conveyor, and the final coating and baking process is performed. Even if a failure occurs in the line, the number of times that uneven paint or paint dripping occurs on the painted surface of the workpiece is reduced, so the number of times that the painted surface of the workpiece is corrected by sanding etc. can be significantly reduced. .

Further, the cart is provided with a rear engaging member that engages with the first conveyor and a front engaging member that engages with the second conveyor. In the engaged state, the engagement between the front engagement member and the second conveyor is released, while in the engagement state between the front engagement member and the second conveyor, the rear engagement member and the first conveyor are disengaged. Is disengaged, so even if a failure occurs in the first painting zone and the conveyance of the first conveyor stops while the carriage is being conveyed from the first conveyor to the second conveyor, The object to be coated in the first coating zone can be reliably transported by the second conveyor while preventing the carriage from being transported by the second conveyor.
Further, for example, when the coating of the object to be coated is not completed in the first coating zone and the rear engagement member and the first conveyor are engaged, the front engagement member and the second conveyor are engaged. Since the objects are not mixed, the object to be coated can be prevented from being transported downstream by the cart by the second conveyor.

According to the invention of claim (2), the coating zone in the invention of claim (1) performs clear coating on the object to be coated a plurality of times to form a clear coating surface on the surface of the object to be coated. Since the clear coating and baking process are performed as usual on the substrate to which the clear coating up to the last round has been completed, the first clear coating is performed.
Even if a failure occurs in the painting zone, it is possible to avoid a situation in which the already formed clear painted surface is entirely removed and corrected.

Furthermore, according to the invention of claim (3), the coating step
A first coating step in which the object to be coated is conveyed by the first conveyor and the coating is performed up to the last time, and a second coating in which the object to be coated is conveyed by the second conveyor and the final coating is performed When a failure occurs in the first coating process, the operation of the first conveyor is stopped, and the operation of the second conveyor is continued to complete the first coating. Since the final coating and baking process is performed on the object to be coated as usual, even if a failure occurs in the coating line, the coated surface of the object by sanding or the like, similarly to the invention of claim (1). Can be significantly reduced.

In the first painting step, the cart is engaged with the first conveyor by the first conveyor, and the cart is moved to the second conveyor in the second painting step. As described above, since the front engagement member and the second conveyor are conveyed while being engaged with each other, a failure occurs in the first painting zone and the first conveyor is conveyed as in the invention of claim (1). When the vehicle stops, the carriage can be prevented from being conveyed by the second conveyor, the object to be coated can be surely conveyed by the second conveyor, and the painting in the first painting zone is not completed. When the rear engaging member of the cart and the first conveyor are engaged, the article to be coated can be prevented from being transported to the downstream side.

[Brief description of the drawings]

FIGS. 1 to 3 show a coating apparatus according to an embodiment of the invention of claim (1). FIG. 1 is a schematic configuration diagram of the coating apparatus.
The figure is a vertical sectional side view showing a truck and a drive mechanism of the truck, and FIG. 3 is a vertical sectional rear view showing the truck and a drive mechanism of the truck. B: Body (object to be coated) 10: Dolly 12: First painting zone 14: Second painting zone 16: Baking zone 60: First conveyor 62: Second conveyor 64 … Transfer conveyor 90 …… Control means

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI B65G 43/08 B65G 43/08 B 47/52 47/52 A (58) Investigated field (Int.Cl. ⁷ , DB name) B05B 13/02 B05C 13/02 B05D 3/00 B65G 43/08 B65G 47/52 B65G 35/06 B62D 65/00

Claims (3)

(57) [Claims] 1. A coating zone for carrying a plurality of coatings on an object to be transported by a coating conveyor while the object to be coated is mounted on a carriage, and a coating zone provided in front of the coating zone in the transport direction. A coating apparatus comprising: a baking zone for transferring a coated object placed on the carriage by a baking conveyor and performing a baking process on the coated object. The coating conveyor includes a first conveyor arranged in a first coating zone for performing coating up to the last time on the object to be coated in the coating zone, and a downstream side of the first coating zone. And a second conveyor to be disposed. The second conveyor is connected to the baking conveyor so that the object to be coated conveyed by the second conveyor is continuously conveyed by the baking conveyor. Established A rear-side engaging member for engaging with the first conveyor and allowing the first conveyor to run the bogie; and a rear-side engaging member disposed forward of the rear-side engaging member in the transport direction. A front engagement member that engages with the second conveyor, and when the rear engagement member is engaged with the first conveyor, the engagement member and the second conveyor When the front engagement member is engaged with the second conveyor, the engagement between the rear engagement member and the first conveyor is released. A coating apparatus, comprising: control means for stopping the operation of the first conveyor and continuing the operation of the second conveyor when a failure occurs in the first coating zone. 2. The coating apparatus according to claim 1, wherein said coating zone is a zone for performing clear coating a plurality of times on an object to be coated. 3. A coating step of transporting the object to be coated in a coating zone in a state where the object is placed on a trolley and coating the object on the trolley a plurality of times. A baking process of performing baking processing on the article to be placed and transported through the baking zone, wherein the coating step comprises transporting the article to be coated on a first conveyor and The first to apply the coating up to the last time
And a second step of performing the final coating on the object while conveying the object coated in the first coating step by a second conveyor downstream of the first conveyor. A rear-side engaging member for engaging the first conveyor and allowing the first conveyor to run the carriage, and transporting the vehicle more than the rear-side engaging member. The rear engagement member is engaged with the first conveyor while the rear engagement member is engaged with the second conveyor when the engagement of the rear engagement member with the first conveyor is released. A front engagement member that is disengaged from the second conveyor when the first engagement step is performed. In the first painting step, the rear engagement member engages with the first conveyor. While the carriage is transported by the first conveyor in the state of being made to move, in the second coating process, the front engagement member The carriage is transported by the second conveyor in a state where the first conveyor is engaged with the second conveyor, and when a failure occurs in the first coating process, the operation of the first conveyor is stopped, while the operation of the first conveyor is stopped. A coating method, wherein the operation of the second conveyor is continued, and the final coating and baking process is performed on the object being conveyed by the second conveyor.