JP2506223B2 - Automatic painting equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic coating device for coating the side surface and the upper surface of an automobile body or the like to be coated.

[Conventional technology]

In the past, when painting an automobile body, the left and right side surfaces were painted by a side machine, and the upper surfaces of the engine hood, roof, trunk lid, etc. of the car body were painted by a top machine.

The side machine has a coating machine arranged horizontally from the right and left sides of the conveyance path so as to face the object to be coated, and the top machine has a predetermined position on an elevating platform arranged in a direction orthogonal to the conveyance path. The sprayers are installed vertically downward at intervals so that the sprayer spacing can be adjusted according to the coating width.

Therefore, when painting the body, the left and right side surfaces are painted by a side machine painting machine, and then the engine hood, roof and trunk lid are painted by a top machine painting machine.

At this time, the coating machine of the side machine is installed horizontally, and the coating machine of the top machine is installed vertically downward, so that the coating machines are installed facing the substantially vertical left and right side surfaces and the substantially horizontal upper surface. can do.

By the way, recent passenger car bodies are generally rounded due to changes in design, and an increasing number of curved and upper surface boundary portions are continuously formed with curved surfaces. In order to paint neatly, the coating machine must be positioned so that it is approximately perpendicular to the curved surface from the direction diagonally above the boundary.

[Problems to be Solved by the Invention]

However, in the conventional top machine and side machine, since the coating machine is installed vertically downward and horizontally, respectively, the coating machine cannot be positioned so as to be substantially perpendicular to the curved surface of the boundary portion. There was a problem that the curved surface could not be painted neatly.

In addition, a side machine and a top machine must be installed to paint the side and top surfaces, respectively. In this case, each machine is as heavy as 3 to 8 tons, and therefore the foundation work for the floor of the painting booth in which this machine is installed is large, and there is a problem that the installation cost increases.

Furthermore, in the coating booth, an air flow of about 0.4 m / s per second blown from the ceiling surface is sucked into the floor surface to prevent coating defects due to paint flying up. Is mounted vertically downwards from a large elevator, so the air flow at the painting site is disturbed or blocked by the elevator, which adversely affects coating quality.

Therefore, the present invention is capable of not only coating the side surface and the upper surface with one automatic coating apparatus, but also coating the curved surface of the boundary portion between the side surface and the upper surface even when coating a rounded vehicle. You can position the machine freely,
Moreover, it is an object to provide an automatic coating device that does not disturb the air flow formed in the coating booth.

[Means for achieving the task]

In order to achieve this problem, the present invention is a tracking mechanism that guides a guide rail that is formed in an arch shape so as to straddle the conveyance path of the object to be coated, and that controls the movement of the guide rail along the conveyance path. A coating machine is provided, which is provided and whose movement is controlled along the arch-shaped track of the guide rail.

[Action]

When the automobile body that is the object to be coated is transported to the coating position, each coating machine is movement-controlled according to the coating site along the arched track of the guide rail that is erected over the transportation path, When painting the side surface, it is positioned on the leg side of the arch-shaped track so as to face the side surface, and when painting the upper surface, it is positioned on the top side so as to face the upper surface.

At this time, the coating machine is moved along the arch-shaped trajectory, so the coating machine is always directed toward the center of the arch, and even when the boundary between the side surface and the upper surface is curved, the coating machine is painted. The machine can be positioned diagonally above the boundary in a direction substantially orthogonal to the curved surface.

Then, while the coating machine is positioned, the tracking mechanism moves the guide rail along the transport path to perform coating.

In this case, the tracking mechanism is not limited to the case of controlling the movement of the guide rail itself along the conveyance path, but may be the case of moving the relative side of the guide rail by moving the object side back and forth.

〔Example〕

Hereinafter, the present invention will be specifically described based on the embodiments shown in the drawings.

FIG. 1 is a perspective view showing an example of the present invention, FIG. 2 is a perspective view showing an essential part thereof, and FIG. 3 is a rear view.

In the figure, reference numeral 1 denotes a guide rail provided with controllable movements of the coating machines T _{1 to} T _4, and is formed in an arch shape so as to straddle a conveyance path 2 for the article W to be coated. 3R and 3L
Supported by.

The bases 3R and 3L are arranged on tracking devices 5R and 5L which are controlled to move along the rails 4 and 4 arranged along the conveying path 2, and the guide rail 1 is coated by the tracking devices 5R and 5L. The coating machines T _{1 to} T ₄ are moved by moving them in the front-back direction of W.

Further, each base 3R and 3L is provided with cylinders 6, 6 ... For raising and lowering the guide rail 1, and the heights of the coating machines T _{1 to} T ₄ are adjusted by expanding and contracting the cylinders 6, 6 ... It is designed to be adjustable according to the height of.

Each of the coating machines T _{1 to} T ₄ has an arch-shaped track 1 a of the guide rail 1.
The carriages C _{1 to} C ₄ whose movements are controlled along are provided at the tips of the respective cylinders 7 so as to be swingable in the front-rear direction, and by extending and contracting the cylinders 7, it is possible to adjust the distance between the objects W to be coated. At the same time, the motor 8 is driven to orient the coating machines T _{1 to} T ₄ in the horizontal direction so that the front and rear surfaces of the article W can be coated.

In addition, a pinion 9 that engages with the rack 1b formed on the outer peripheral side of the track 1a of the guide rail 1 is attached to each of the carriages C _{1 to} C ₄ ,
Guide rollers 10 and 10 which are brought into contact with the inner peripheral surface side of the track 1a are mounted, and the pinion 9 is driven to drive the carriage.
A motor 11 for controlling the movement of C _{1 to} C ₄ and an optical sensor 12 for recognizing the current position by reading the code pattern P marked along the side surface of the guide rail 1 are provided.

The above is an example of the configuration of the present invention, and its operation will be described below.

For example, when an automobile body to be coated W is stopped at a predetermined coating position, a side surface-rear surface-rear trunk lid-
Painting is done in the order of roof-engine hood-front.

First, when painting the side surface, the cylinder 6 is extended and the guide rail 1 is set to a predetermined height according to the vehicle height as shown by the solid line in FIG. Next, the carriages C _{1 to} C ₄ are moved so that the coating machines T ₁ and T ₂ face the right side surface and the coating machines T ₃ and T ₄ face the left side surface, respectively.

Then, the coating is started in a state where the coating machines T _{1 to} T ₄ are positioned, and the side surfaces are coated while moving the coating machines T _{1 to} T ₄ from the front side to the rear side of the article W by the tracking devices 5R and 5L. .

At this time, the carriages C _{1 to} C ₄ are moved along the arch-shaped track 1a of the guide rail 1, and the coating machines T _{1 to} T ₄ are always directed toward the center of the arch, and the side surfaces are curved. Even if it is, the coating machines T _{1 to} T ₄ can be made to face each other at a substantially right angle to the curved surface, so that the coating quality can be made uniform.

When the side coating is completed, in order to paint the rear surface this time, the carriages C _{1 to} C ₄ are moved toward the top of the guide rail 1 and the cylinder 6 is contracted so that the coating machines T _{1 to} T ₄ are covered. Lower the guide rail 1 to a height that reaches the rear surface of the coating material W.

Then, the cylinders 7 attached to the carriages C _{1 to} C ₄ are expanded and contracted to adjust the coating machines T _{1 to} T ₄ to the height of the rear surface, and the coating machines T _{1 to} T ₄ are directed horizontally forward. The object W is made to face the rear surface.

After coating the rear surface with each of the coating machines T _{1 to} T ₄ thus positioned, this time, while moving the guide rail 1 from the rear to the front by the tracking devices 5R and 5L, the trunk lid-roof-engine hood. To paint.

In this case, the coating machines T _{1 to} T ₄ are directed downwards, the carts C _{1 to} C ₄ are moved to a preset location according to the coating site, and tracking is performed from the back of the article W to the front. The guide rail 1 is moved up and down by the cylinder 6 according to the height change of the coating surface to perform coating.

At this time, the guide rail 1 is formed in an arch shape,
Since each of the coating machines T _{1 to} T ₄ is directed to the center of the arch-shaped track, even if the boundary between the trunk lid, the roof and the engine hood and the side surface is formed by a curved surface, the curved surface is obliquely above the boundary portion. At a right angle to the coating machine
Since T ₁ and T ₄ can face each other, even a car body with a rounded design can be painted neatly.

When the painting of the engine hood is painted front finished, each coating machine T ₁ through T _4, positioned as if painted the rear, toward the horizontal rearward so as to face front and paint To do.

As described above, according to the present embodiment, all of the side surfaces, front and rear surfaces, and the upper surface can be painted with one automatic coating device, and the boundary between the upper surface and the side surface is a curved car body. Even in the case of coating, the coating quality can be improved because the coating machine can be made to face the curved surface obliquely above the boundary portion at an angle close to a right angle.

Also, during painting, there is only a guide rail standing above the coating machines T _{1 to} T ₄ so as to straddle the transport path, so the air flow is less likely to be disturbed or interrupted, which results from these. It can prevent poor painting.

In the description of the embodiment, only the case where the guide rail 1 is moved back and forth by being supported by the tracking devices 5R and 5L has been described, but the present invention is not limited to this, and the guide rail 1 with respect to the article W to be coated. A tracking mechanism that moves the article W back and forth as long as the relative movement is performed may be adopted.

Further, the number of coating machines is not limited to four, and can be arbitrarily increased or decreased according to the size and shape of the article to be coated W, the performance of each coating machine, and the like.

Furthermore, the means for recognizing the current positions of the carriages C _{1 to} C ₄ is not limited to the type in which the mark of the code pattern P written on the guide rail 1 is read by the optical sensor 12 like the linear encoder, but the motor 11 It may be of a type having a built-in rotary encoder.

 FIG. 4 is a perspective view showing another embodiment.

In this example, both ends of the guide rail 20 that guides the carriages C _{1 to} C ₄ are horizontal guide rails arranged along the transport path 2.
It is supported by sliders 22R and 22L that slide on 21R and 21L.

The sliders 22R and 22L are motors 23 that are driven to rotate forward and backward.
Is engaged with the connecting rod 25 of the towing vehicle 24 traveling along the transport path 2 via the chain 23a so as to be vertically slidable, so that the guide rail 20 can be tracked back and forth via the connecting rod 25. Is made.

Further, the front and rear ends of each horizontal guide rail 21R and 21L are attached to the lifting cylinders 26R and 26L, 27R and 27L, and the guide rail 20 can be lifted and lowered by extending and retracting the lifting cylinders 26R and 26L, 27R and 27L. Is made.

Furthermore, the lifting cylinders 26R and 26L, 27R and 27L,
Horizontally movable rails H _{1 to} H ₄ each having racks 28 and 29 formed in an arch shape so as to straddle the transport path 2 and having pinions 30 and 31 meshed with the racks 28 and 29 mounted at both ends. Is loosely fitted to each of the carts C _{1 to} C ₄ , and the horizontal movement rail is driven by driving the pinion 30 with the motor 32.
Via H ₁ to H ₄ it is made to be able to move the carriage C ₁ -C ₄ in place.

Thus, each truck C ₁ -C ₄ and the guide rail 20 can move the control similarly to the embodiment article to be coated W side of - rear - trunk lid - roof - Engine hood -
The front can be painted.

〔The invention's effect〕

As described above, according to the present invention, the movement of the coating machine is controlled along the arch-shaped track of the guide rail that is erected over the transportation path, and the coating machine is freely positioned according to the coating site. Therefore, there is an effect that both the upper surface and the side surface can be coated with one automatic coating device.

In addition, the coating machine is moved along an arch-shaped trajectory, and the coating machine always faces the center of the arch. Since they can be positioned in a direction substantially orthogonal to each other, coating quality can be improved.

Further, since it is not necessary to provide a large lifting platform on the upper part of the object to be coated, and a simple structure in which an arch-shaped guide rail is provided is sufficient. It has the effect of less disturbing or blocking the flow.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example of the present invention, FIG. 2 is a perspective view showing a main part thereof, FIG. 3 is a front view, and FIG. 4 is a perspective view showing another embodiment. It is a figure. Explanation of reference symbols W: coating object, 1 ... guide rail, 2 ... transport path, 5
R, 5L …… Tracking device, T _{1 to} T ₄ …… Coating machine.

Claims (1)

(57) [Claims] 1. An arch-shaped guide rail (1) is erected so as to straddle a conveyance path (2) of an article to be coated (W),
A tracking mechanism (5R, 5L) for controlling the movement of the guide rail (1) along the conveying path (2) is provided, and the movement is controlled along the arched track of the guide rail (1). T _{1 to} T ₄ ) are provided in the automatic coating device.