JPH0429877Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic painting device suitable for painting from the upper side surface to the upper surface of an automobile body transported by a conveyor.

[Conventional technology]

When topcoating an automobile body, which requires very strict coating quality, an automatic painting device is used to paint the side surface of the automobile body W being conveyed on a conveyor, as schematically shown in Figure 3. The automatic coating machine 30 is reciprocated up and down with a predetermined stroke that is varied according to the coating width of the car body W, and at the same time, the automatic coating machine 30 is made to directly face the painted surface according to the change in the shape of the automobile body W. SR, an automatic painting device that tilts, is used.
The entire coating device SR is run back and forth on a rail 31 laid perpendicular to the conveyance path of the automobile body W to maintain a constant coating distance between the automatic coating machine 30 and the automobile body W. ing.

Then, two automatic painting devices SR of this type are installed on each side along the conveyance path of the automobile body W.
One of them is designed to paint the main part of the side surface of the automobile body W, and the other one is designed to paint the upper side surface of the automobile body W.

[Problem that the invention attempts to solve]

However, automatic painting equipment SR is very large and weighs 2 to 3 tons, making the equipment expensive and requiring a very large installation space, which can block the path for workers and impede traffic. There were also problems such as the need to increase the size of the painting booth in which the SR painting equipment was installed.

Moreover, the paint sprayed from the automatic painting machine 30 is
There were also problems such as staining the surface of the coating device SR and adhering to the rail 31, which obstructed the running of the coating device SR.

In addition, automatic painting equipment that performs ship painting inside a dock is equipped with a robot crane mounted on a movable roof rail installed above the ship to be painted. There is a crane arm that can be extended and retracted, and an automatic painting machine attached to the bottom of the crane arm (Utility Model Application No. 187263/1983).
If this device could be used as is in an automobile paint booth, it would be possible to block the passage for workers.
Problems such as the painting equipment itself being covered with paint and becoming dirty can be solved, but if a movable roof rail is installed above the car body that is the object to be painted, and a robot crane mounted on the roof rail is run. The air flow of the conditioned air introduced from the ceiling of the paint booth may be disturbed, causing fogging of the paint, and dust and oil may fall off from the roof rails, causing defects in the paint film due to particles. Not suitable for high quality coatings such as

In addition, automatic paint machines used for car painting are not only equipped with the main body of the paint machine, but also a tilt mechanism that swings the main body of the paint machine, as well as dozens of color change valves and their drive mechanisms that are essential for multi-color painting. , the overall weight increases significantly.

Therefore, if the crane arm is to be extended and contracted using a pinion rack method or a hollow jack method to raise and lower a heavy automatic painting machine suspended below, a very large and powerful drive device is required. Therefore, it is not possible to reduce the size and weight of the entire coating device, and the manufacturing cost increases significantly.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic coating device that is small, lightweight, and inexpensive to manufacture, and that does not block the passage for workers or prevent the coating device itself from being contaminated by paint.

[Means for solving problems]

In order to achieve this purpose, the automatic painting device according to the present invention has a horizontal member disposed in the upper space.
An arm member that can swing forward and backward relative to the object to be coated is attached, and the entire automatic coating machine, which is suspended and supported by a rotating shaft at the lower end of the arm member, can be rotated in the vertical direction. The automatic coating machine is equipped with a lifting mechanism that lifts and lowers the coating machine body installed at the tip of the coating machine along the painting surface of the object to be coated, and the coating machine body, which is raised and lowered by the lifting mechanism, can move the coating machine body up and down along the painting surface of the coating object. The automatic coating machine is connected to a swinging mechanism that swings the arm member so as to maintain a constant painting distance from the surface, and the automatic coating machine can apply the paint to the surface of the object by swinging only the main body of the coating machine installed at the tip up and down. The tilt servo motor of the tilt mechanism is installed on the rear end side, and
The automatic coating machine is characterized in that the entire automatic coating machine is supported by the rotating shaft at a position where front and rear balance can be maintained.

[Effect]

According to the present invention, an arm member attached to a horizontal member is swung in the direction of moving forward and backward with respect to the object to be coated in accordance with changes in the shape of the object to be coated, and an automatic By rotating the entire coating machine in the vertical direction using a lifting mechanism, a constant coating distance can always be maintained between the coating machine body attached to the tip of the automatic coating machine and the object to be coated.

At the same time, by swinging the sprayer main body up and down using the tilt mechanism, the sprayer main body can be brought to face the painting surface of the object to be coated.

Therefore, it is possible to form a uniform coating film on the painting surface according to changes in the shape of the object to be painted, and the structure of the entire automatic painting device can be significantly simplified and made smaller and lighter than before. Installation space and manufacturing costs are significantly reduced.

In particular, the arm member, which is attached so as to be swingable in the direction of moving forward and backward relative to the object to be coated, can be easily and inexpensively swung with a small driving force, even if the weight of the automatic coating machine suspended from its lower end is large. The automatic coating machine can be easily swung by the mechanism, and since the automatic coating machine suspended from the arm member is supported by a rotating shaft at a position that balances the front and back, the automatic coating machine can be rotated up and down. The lifting and lowering mechanism for moving can also be a simple and inexpensive one with a small driving force.

Furthermore, since the automatic coating machine is suspended from the lower end of the arm member, there is no fear that the automatic coating apparatus itself will be soiled by paint sprayed from the coating machine body of the automatic coating machine.

Furthermore, since the entire automatic painting apparatus is suspended and supported by a horizontal member disposed in the upper space, there is no possibility of blocking the passage inside the painting booth and hindering the passage of workers.

〔Example〕

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

FIG. 1 is a front view showing an example of an automatic coating apparatus according to the present invention, and FIG. 2 is a side view thereof.

In this example, the horizontal member 1 disposed in the upper space
A pair of arm members 2, 2 are attached to the arm members 2, 2, which can swing forward and backward relative to the side surface of the automobile body W, which is the object to be painted. An elevating mechanism C ₁ that vertically rotates the entire automatic coating machine 3 and a tilt mechanism T that vertically swings only the main body 3a of the automatic coating machine 3 are provided, and the entire arm members 2 and 2 are connected to the automobile body W. A swinging mechanism C ₂ is connected to the swinging mechanism C 2 that swings in the direction of moving forward and backward relative to the shaft.

The horizontal member 1 protrudes from the wall of the painting booth in a direction perpendicular to the transport path of the automobile body W, and has upper ends of arm members 2, 2 attached to both left and right ends of a rotating shaft 4 provided at its tip. There is.

In the automatic painting machine 3, a color change valve, piping connected thereto, etc. are housed in an insulating cover case 6 that is supported between arm members 2, 2 so as to be movable up and down on rotating shafts 5, 5. At the same time, a bracket 7 for attaching the sprayer main body 3a is protruded from the front end of the cover case 6, and a bracket 9 for attaching the tilt servo motor 8 is protruded from the rear end of the cover case 6.

The tilt mechanism T has a rotating shaft 10 that is driven by a tilt servo motor 8 to rotate in forward and reverse directions, and a rotating shaft 11 that attaches the paint sprayer main body 3a to the bracket 7 so as to be movable up and down. The components are connected by a parallel crankshaft 12.

In addition, as the coating machine main body 3a, for example, 80KV
A bell-type electrostatic coating machine that applies a high voltage of ~120KV is used.

Next, the elevating mechanism _C1 consists of a hydraulic servo cylinder 13 whose bottom 13a side is supported by one of the arm members 2 and whose rod head 13b side is connected to the rotating shaft 5 via a crank 14. It is a crank mechanism that extends and contracts 13c to rotate the entire automatic coating machine 3 in the vertical direction.

The swinging mechanism C ₂ includes a hydraulic servo cylinder 15 whose bottom 15a side is supported by the rear end of the horizontal member 1, and whose rod head 15b side is connected to a reinforcing member 16 installed between the arm members 2, 2. It is a crank mechanism that extends and contracts the 15 piston rods 15c to swing the entire arm members 2, 2 in the direction of advancing and retracting with respect to the automobile body W.

Therefore, when painting the upper side surface of the automobile body W being conveyed by the conveyor from below to above, the piston rod 15c of the hydraulic servo cylinder 15 is extended from the state shown in FIG. At the same time, the piston rod 13c of the hydraulic servo cylinder 13 is extended to rotate the tip side of the automatic coating machine 3 upward, and the coating machine main body 3a is moved toward the side of the automobile body W. Raise the W while maintaining a constant coating distance along the slope of the upper side surface.

At the same time, the tilt servo motor 8
to swing the sprayer main body 3a downward,
The coating machine main body 3a is raised along the inclined side surface of the automobile body W until it reaches the horizontal upper surface, and is brought to face the painted surface.

Next, when painting the upper side surface of the automobile body W from above to below, in contrast to the above, the piston rod 15c of the hydraulic servo cylinder 15 is painted.
is contracted and the arm members 2, 2 are attached to the automobile body W.
At the same time, the piston rod 13c of the hydraulic servo cylinder 13 is contracted to rotate the tip side of the automatic paint sprayer 3 downward, and the paint sprayer main body 3a is moved against the slope of the side surface of the automobile body W. Lower it while maintaining a constant painting distance along the line.

At the same time, the tilt servo motor 8
is driven to swing the sprayer main body 3a upward from the position shown by the chain line in FIG. Directly face the painted surface while being lowered.

As a result, the coating machine main body 3a and the automobile body W
A constant coating distance is always maintained between the two, and at the same time, the coating machine main body 3a is always directly facing the painted surface of the automobile body W, so that good coating quality can be obtained.

Moreover, since the paint sprayer main body 3a moves over a wide range shown by diagonal lines in FIG. 1 by means of the lifting mechanism _C1 and the swinging mechanism _C2 , it can reliably follow any changes in the shape of the automobile body W. .

In addition, the structure of the entire automatic painting device is significantly simplified, making it much smaller and lighter than conventional devices, so the installation space is extremely small, and the manufacturing cost is also significantly reduced.

In addition, since the entire automatic coating device is suspended and supported by a horizontal member 1 disposed in the upper space, this may block the passage inside the coating booth and obstruct the passage of workers, or may cause problems during cleaning inside the coating booth. It won't get in the way of your work.

Furthermore, since the automatic coating machine 3 is attached to the lower ends of the arm members 2, 2 and suspended from above, the automatic coating machine itself may be contaminated by the paint sprayed from the coating machine body 3a. There is no risk of it happening.

In particular, by tilting the sprayer main body 3a integrally with the cover case 6, it is possible to reliably prevent the surface of the cover case 6 from being contaminated with paint.

In addition, since the color change valve, which may cause leakage of the high voltage applied to the paint sprayer body 3a, is housed in the insulating cover case 6, there is less danger to the operator, and at the same time, the color change valve can be used for painting. Machine body 3
There will be no contamination with paint sprayed from a.

In addition, the automatic coating machine 3 has a coating machine main body 3a and a tilt servo motor 8 protruding from the front and rear ends of a cover case 6 in which heavy color change valves and the like are housed. This has the advantage that the driving force of the lifting mechanism _C1 for vertically rotating the automatic coating machine 3 is very small. be.

Note that the lifting mechanism C ₁ and the swinging mechanism C ₂ are not limited to crank mechanisms using hydraulic servo cylinders, but may also be mechanisms in which a servo motor that is driven to rotate forward and backward at a fixed angle is directly connected to the rotating shaft 4 or 5. You can.

Further, the tilt servo motor 8 has a rotating shaft 11.
It may be directly connected to.

[Effect of idea]

As mentioned above, the automatic painting equipment according to the present invention can be significantly smaller and lighter than conventional equipment, so its manufacturing cost is significantly reduced, and the installation space within the painting booth is extremely small. This has the excellent effect of making it possible to downsize the painting booth.

Furthermore, since the entire automatic painting apparatus is installed in the upper space, there is no possibility of blocking the passageway inside the painting booth and hindering the passage of workers or cleaning work.

Furthermore, there is also the effect that the automatic coating device itself is not contaminated by the paint sprayed from the automatic coating device, making it extremely useful.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of an automatic coating apparatus according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a schematic front view of a conventional apparatus. Explanation of symbols, 1...Horizontal member, 2...Arm member, 3...Automatic coating machine, 3a...Painting machine body,
C ₁ ... Lifting mechanism, C ₂ ... Swing mechanism, T ... Tilt mechanism, W ... Automobile body (object to be painted).

Claims (1)

[Scope of utility model registration request] An arm member 2 is attached to a horizontal member 1 disposed in the upper space, and is swingable in the direction of advancing and retreating with respect to the object W to be coated. The automatic coating machine 3 is rotated vertically to remove the automatic coating machine 3.
A lifting mechanism C ₁ is provided for raising and lowering the coating machine main body 3a provided at the tip of the coating machine along the painting surface of the object W to be coated, and the coating machine main body 3a that is raised and lowered by the lifting mechanism C ₁ moves up and down the coating machine main body 3a along the coating surface of the object W to be coated. A swinging mechanism C ₂ is connected to swing the arm member 2 so as to maintain a constant painting distance from the painting surface of W, and the automatic sprayer 3 swings only the sprayer main body 3a provided at the tip up and down. Tilt mechanism T to directly face the painted surface of the object W to be painted.
An automatic coating device characterized in that a tilt servo motor 8 is provided at the rear end side, and the entire automatic coating device 3 is supported by the rotating shaft 5 at a position where front and rear balance can be achieved.