JPH0446849Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is based on a lifting frame that automatically raises and lowers the upper surface of the object to be coated, which is conveyed at a predetermined speed by a conveyor or the like, according to changes in the shape of the object. The present invention relates to an automatic painting device that performs painting using a painted paint machine.

[Prior Art] This type of automatic painting device is called a top-press coating device, and for example, as shown in FIG.
Both ends of the elevating frame 31 provided at A and 30B are
It is supported by elevating bodies 33R and 33L that move up and down along pillars 32R and 32L that are erected on both sides of the conveyance path of the workpiece W, and horizontally in a direction perpendicular to the conveyance path of the workpiece W. It is arranged such that it automatically moves up and down in response to changes in the top surface shape of the object W to be coated.

A slider 34, a slider driving motor 35, and the like that reciprocate the coating machines 30A and 30B along the width direction of the object W to be coated at a predetermined stroke are attached to the elevating frame 31.

Although not shown, the slider 34 includes:
Painting machines 30A and 30 depending on the coating width of the object W to be painted
A motor for adjusting the distance between B is also attached.

[Problem to be solved by the invention] For this reason, the elevating frame 31
The heavy load of the motor 35 and motor 35 is applied, and it must be made sturdy to withstand the load, so the overall weight increases significantly. The capacity and power consumption of the drive motor 36 have become extremely large.

Therefore, the present applicant supported both ends of an elevating frame on an elevating body via parallel links that oscillated in a direction perpendicular to the transport path of the workpiece, and the entire elevating frame was connected to a crank provided on one elevating body. We proposed an automatic coating device that reciprocated the coating machine by horizontally swinging the device (patent application 1986-
229927), an attempt was made to eliminate the slider 34 and motor 35 as shown in FIG. 3 from the lifting frame.

However, it has been found that if this is done, there is a risk that the paint spray pattern of the paint sprayer installed on the lifting frame may be disrupted by the turbulence caused by the wind pressure when the entire lifting frame swings, resulting in uneven coating. .

In addition, since a large painting booth in which a totsu press machine is installed usually uses a supply painting booth in which fresh clean air is introduced from above, it does not matter whether the lifting frame 31 is swung or not. First, the air flow of the clean air hits the upper surface of the lifting frame 31 and generates a vortex on the lower surface thereof, which causes the paint sprayer 30 fixed to the lower surface of the lifting frame 31 to
The paint spray patterns of A and 30B were sometimes disrupted.

Furthermore, if you want to swing the entire lifting frame,
There was a problem in that the parallel links for suspending the sprayer had to be made very strong, and at the same time, the power of the crank device that drove the parallel links and reciprocated the paint sprayer had to be increased.

Therefore, the present invention reduces the weight of the lifting frame on which the paint sprayer is installed, and also prevents the paint spray pattern of the paint sprayer from collapsing due to airflow turbulence.
Another object of the present invention is to provide an automatic coating device that can reduce the power of the crank device that reciprocates the coating device.

[Means for solving problems]

In order to achieve this objective, the present invention has an elevator frame equipped with a coating machine, which is supported by an elevator that moves up and down along a support column, and is arranged horizontally in a direction perpendicular to the conveyance path of the object to be coated. In an automatic coating device that is configured to automatically move up and down in response to changes in the upper surface shape of the object to be coated, the coating machine moves up and down through a parallel link that swings in a direction perpendicular to the transport path of the object to be coated. A crank device that is suspended from the elevating frame and drives the parallel link is attached to the elevating body.

[Effect]

According to the present invention, the entire lifting frame does not swing, and only the paint sprayer suspended from the lifting frame through parallel links swings and makes a reciprocating motion.
There is no problem in that the paint spray pattern of the paint sprayer is disrupted due to airflow turbulence caused by the swinging of the lifting frame.

In addition, since the paint sprayer is suspended from the lower surface of the elevating frame via a parallel link, the clean air introduced from above the elevating frame hits the upper surface of the elevating frame and creates a vortex on the lower surface side of the elevating frame. Even if this occurs, there is no risk that the paint spray pattern of the paint sprayer will be affected by it.

Furthermore, since the parallel link is not for suspending the lifting frame, but for suspending the coating machine provided on the lifting frame, it is not necessary to make it very sturdy. Moreover, the power of the crank device that drives the parallel link can also be small.

〔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 painting apparatus according to the present invention, and FIG. 2 is a front view showing an example of its operation.

In this example, the object to be painted W is placed on the lifting frame 1.
Pairs of parallel links 2R and 2L, 3R and 3L, 4R and 4L are attached to each other, and the paint machines 5A, 5B and 5C are attached to the lifting frame 1 through the parallel links. It is suspended.

The elevating frame 1 has one end erected only on either the left or right side of the conveyance path for the object W to be coated.
It is supported by an elevating body 8 that moves up and down along a guide rail 7, and is arranged horizontally in a direction orthogonal to the conveyance path of the object W to be coated.

Inside the column 6 are a pair of upper and lower sprockets 9U,
A drive chain 10 whose both ends are connected to the elevating body 8 is disposed between the sprockets 9U and 9D.
are hung in parallel. In addition, sprocket 9D
is connected to a motor 11 for driving up and down, and a counterweight 12 that balances the load of the lift frame 1 is interposed in the drive chain 10.

A pair of upper and lower sprockets 13U and 13D are disposed within the support column 6, and a drive chain 14 extending in parallel between the sprockets 13U and 13D serves as a crank for a crank device 15 attached to the elevating body 8. The sprocket 17 is provided coaxially with the sprocket 16. Note that a motor 18 installed at the lower end of the support column 6 is connected to the sprocket 13D.

Next, the coating machines 5A, 5B, and 5C are connected to a tilt motor 19 provided at the lower end of each parallel link, and are always aligned with the painted surface of the workpiece W according to changes in the shape of the workpiece W. It is tilt-driven so that the

Parallel link 3R that suspends the central coating machine 5B,
3L has its upper end fixed to the center position of the lifting frame 1.

The upper ends of the parallel links 2R, 2L and 4R, 4L that suspend the left and right sprayers 5A and 5C are
The lift frame 1 is provided with a guide shaft 20 arranged horizontally along its longitudinal direction, and the lift frame 1 is supported by slide bases 21L and 21R which are slidably supported on the guide shaft 20. The guide shafts 20L and 21R are attached to the slide bases 21L and 21R, respectively.

The slide bases 21R and 21L are screwed onto both ends of a screw shaft 22 having left and right reverse threads, and a width adjusting motor 23 that rotationally drives the screw shaft 22 causes the paint machines 5A and 5C to approach or move away from each other. It is designed to move in the direction.

Also, one link 2R that suspends the paint machine 5A
and one link 3L that suspends the central painting machine 5B.
are connected to each other via links 24, and
The other link 3R, which suspends the sprayer 5B in the center, and the link 4L, which suspends the sprayer 5C, are connected to each other via a link 25 selected to have the same length as the link 24. The other link 4R that suspends the lift body 8 is connected to a crank 16 of a crank device 15 attached to the elevating body 8 via a connecting rod 26.

Note that 27 is a control device that controls the rotation of the width shifting motor 23 according to the coating width of the object W to be coated.

However, when painting the object W to be painted,
By rotating the lifting drive motor 11 in the forward and reverse directions to move the lifting body 8 up and down, the lifting frame 1 supported by the lifting body 8 is raised and lowered in accordance with changes in the top surface shape of the object W to be coated. The painting distance between the painting machines 5A to 5C suspended from the lifting frame 1 is maintained constant, and each of the painting machines 5A to 5C is tilted by each tilt motor 19 to coat the painting surface. to face directly.

At the same time, the motor 18 is rotated in a fixed direction to run the drive chain 14 stretched between the sprockets 13U and 13D, rotating the crank 16 which is provided coaxially with the sprocket 17 around which the drive chain 14 is stretched, and causing the parallel links 4R, 4L which suspend the sprayer 5C to perform pendulum motion via the connecting rod 26 which converts the rotational motion of the crank 16 into linear reciprocating motion.

As a result, the parallel links 2R, 2L and 3R, 3L that suspend the paint sprayers 5A and 5B are also linked together via the links 24 and 25, and the parallel links 4R, 4L that suspend the paint sprayer 5C. Each of the coating machines 5A to 5C swings in the same direction and reciprocates in the width direction of the object W to be coated, so that the entire upper surface of the object W to be coated is uniformly coated.

As described above, according to the present invention, the coating machines 5A to 5
C is suspended from the elevating frame 1 via a parallel link, and is provided at a location separated from the lower surface of the elevating frame 1, and only the paint machines 5A to 5C swing without the elevating frame 1 swinging. Since it is designed to move back and forth, the paint sprayer 5A~
Airflow turbulence that would disrupt the spray pattern of the paint sprayer 5C does not occur, and the crank device 15 for reciprocating the paint sprayers 5A to 5C can be simple and small, and its power can always be very small.

Further, since there is no need to provide the lift frame 1 with a slider or a slider drive motor for reciprocating the coating machines 5A to 5C as in the conventional case, the weight of the lift frame 1 as a whole is significantly reduced. Therefore, the capacity and power consumption of the lifting drive motor 11 that moves the lifting body 8 up and down can be extremely small.

In addition, when the coating width of the object W to be coated changes,
By rotating the screw shaft 22 by the width adjustment motor 23 and moving the slide bases 21L and 21R, which are screwed together with the screw shaft 22, by a certain distance in the direction toward or away from each other,
The coating machines 5A and 5C are moved toward or away from each other depending on the coating width of the object W to be coated.

For example, when painting the roof surface of an automobile body, which is the object W to be painted, the slide bases 21L and 21R are moved a certain distance in the direction away from each other as shown in FIG. 5A
A link 24 is connected between each of the parallel links 2R, 2L and 4R, 4L that suspends the painting machine 5C and the parallel links 3R, 3L that suspends the central painting machine 5B.
Painting machines 5A and 5C with the part 25 as the fulcrum
At the same time, the amount of paint sprayed by the coating machines 5A to 5C is decreased so that the coating width becomes smaller.

As a result, uniform coating can be applied to the roof surface, which has a narrow coating width compared to other parts.

In particular, since the left and right coating machines 5A and 5C reciprocate along the curved surfaces forming both the left and right ends of the roof as shown in FIG. 2, the coating finish of the entire roof surface is very good.

[Effect of idea]

As described above, according to the present invention, the slider for reciprocating the paint sprayer, its drive motor, etc. can be eliminated from the lifting frame, making it possible to significantly reduce the weight of the entire lifting frame. The amount of power needed to do this is very small, and the paint spray pattern of the paint sprayer will not be distorted by the influence of airflow, which will reliably prevent uneven coating and improve painting quality. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of an automatic painting apparatus according to the present invention, FIG. 2 is a front view showing an example of its operation, and FIG. 3 is a front view showing a conventional apparatus. Explanation of symbols, W...Object to be painted, 1...Elevating frame, 2R, 2L...Parallel link, 3R, 3L...
...Parallel link, 4R, 4L...Parallel link, 5A
...painting machine, 5B...painting machine, 5C...painting machine,
6... Support column, 8... Lifting body, 15... Crank device.

Claims (1)

[Scope of utility model registration request] An elevating frame equipped with a coating machine is supported by an elevating body that moves up and down along a support column, and is arranged horizontally in a direction perpendicular to the conveyance path of the object to be coated, and automatically moves according to changes in the top surface shape of the object to be coated. In an automatic coating device that is configured to move up and down in a vertical manner, the coating machine is suspended from the lifting frame via a parallel link that swings in a direction perpendicular to the conveyance path of the object to be coated, and drives the parallel link. An automatic painting device characterized in that a crank device is attached to the elevating body.