JPH0446848Y2 - - 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.

[Conventional technology]

This type of automatic painting equipment is called a top-pressure painting equipment, and for example, as shown in Fig. 4, a painting machine 40
Both ends of the elevating frame 41 provided with A and 40B are
It is supported by elevating bodies 43R and 43L that move up and down along pillars 42R and 42L 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 44, a slider driving motor 45, and the like that reciprocate the coating machines 40A and 40B along the width direction of the object W to be coated at a predetermined stroke are attached to the elevating frame 41.

Although not shown, the slider 44 includes:
Painting machines 40A and 40 depending on the coating width of the object W to be painted
A motor for adjusting the distance between B is also attached.

[Problem that the invention attempts to solve]

For this reason, the elevating frame 41 has a slider 44
The weight of the motor 45 is applied to the motor 45, and it must be made strong enough to withstand the load, resulting in a significant increase in overall weight.

Furthermore, in order to raise and lower the heavy lifting frame 41, both left and right ends of the lifting frame 41 are supported by two supports 42R and 42L, so the installation space for the entire device becomes very large. There was a problem in that the painting booth to accommodate it had to be larger as well. If the entire apparatus is supported by the two supports 42R and 42L, the mechanism for tracking it along the conveyance path of the object W to be coated will be extremely complicated, increasing equipment costs and reducing the space in the coating booth. There was also the problem that the work space became extremely small.

Note that Japanese Patent Application Laid-Open No. 62-234566 describes a device in which one end of an elevating frame is supported by one support, but in this device, a shift cylinder for reciprocating the coating machine is provided on the elevating frame. As a result, the weight of the elevating frame increases as in the past, so the structure of the elevating body and support that supports the elevating frame at only one end must be made stronger, more complex, and larger than before.

That is, in this device, the elevating frame is expanded and contracted in the horizontal direction to reciprocate the coating machine together with the elevating frame, so there is no need to provide a slider 44 as shown in Figure 4 of the drawings of the present application, and the elevating frame is moved accordingly. However, in exchange, a large shift cylinder with enough power to extend and retract the heavy lifting frame that houses the paint machine is required, and the heavy load of that cylinder is applied. Furthermore, in order to support the load, the structure of the lifting frame must be made strong, so in the end, it is not possible to reduce the overall load of the lifting frame compared to the conventional device.

Therefore, the structure of the elevating body and the pillar supporting the elevating frame becomes large-scale, making it impossible to simplify and downsize the entire device.

Therefore, an object of the present invention is to provide an automatic coating device that can simplify and downsize the entire device to significantly reduce its installation space and equipment costs, and also secure a wide working space within the coating booth.

[Means for solving problems]

In order to achieve this purpose, the present invention has an elevating frame equipped with a coating machine, which is supported by an elevating body that moves up and down along a support, 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 according to changes in the upper surface shape of the object to be coated, the support is erected only on either the left or right side across the conveyance path of the object to be coated. One end of the elevating frame is supported by an elevating body arranged on a support column, and each pair of parallel links that are pendulum-moved in a direction perpendicular to the conveyance path of the workpiece are attached to the elevating frame by a crank device provided on the elevating body. are attached, and each sprayer is suspended from the lifting frame by each parallel link, and each parallel link is connected to other adjacent parallel links via the link, and the central sprayer The upper ends of the parallel links that hang the paint sprayer are fixed in place on the lifting frame, and the upper ends of each parallel link that hangs the left and right paint sprayers are
It is characterized in that it is attached to a slide base that can move toward or away from each other along the elevating frame.

[Effect]

According to the present invention, each painting machine, which is suspended from a lifting frame by each pair of parallel links, is reciprocated in a direction perpendicular to the conveyance path of the object to be painted by a crank device that makes each parallel link move in a pendulum manner. Since the crank device is not installed on the lifting frame, but on the lifting body that moves up and down along the column, the load on the lifting frame is reduced, and at the same time, the strength of the lifting frame is increased by the reduced load. The load on the frame itself can be reduced by dropping the frame.

Therefore, one end of the elevating frame can be supported by a simple elevating body and a support, and since only one end is supported by one support, the entire device can be significantly simplified and miniaturized.

〔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, FIG. 2 is a right side view thereof, and FIG. 3 is a front view showing an example of its operation.

In this example, the object W to be painted is mounted 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 is supported at one end by an elevating body 8 that moves up and down along a guide rail 7 of a support 6 that is erected only on either the left or right side of the conveyance path for the object W to be coated. It is arranged horizontally in a direction perpendicular to the transport path of the object W.

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 sprockets 13U and 13D are arranged above and below 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.

Further, at the lower end of the support column 6, as shown in FIG.
A slide cover 21 is attached to cover the entire tracking mechanism for driving the wheels 20, 20.

The slide cover 21 is made of steel plates S ₁ , S ₂ , S ₃ of similar shapes, each having an arcuate upper surface.
...etc., etc., stacked in multiple stages and connected in a flexible manner, unlike conventional covers that use rubber bellows, paint does not stick to the surface of the cover, and at the same time, it does not stick to the surface of the bellows. This has the advantage of reliably preventing problems such as the bellows bellows sticking together due to the dried and solidified paint and the surface of the bellows being torn off when the bellows next expands and contracts.

The coating machines 5A, 5B, and 5C are connected to a tilt motor 22 provided at the lower end of each parallel link, so that the coating machines 5A, 5B, and 5C are always directly facing the painted surface of the object W to be painted according to changes in the shape of the object W to be painted. Tilt driven.

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.

In addition, the upper ends of each of the parallel links 2R, 2L and 4R, 4L that suspend the left and right paint machines 5A and 5C are
The slide bases 24L and 24R are respectively attached to slide bases 24L and 24R that are slidably supported by a guide shaft 23 horizontally disposed along the longitudinal direction of the elevating frame 1.

The slide bases 24R and 24L are screwed onto both ends of a screw shaft 25 having left and right reverse threads, and a width-adjusting motor 26 that rotationally drives the screw shaft 25 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 a link 27, 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 28 selected to have the same length as the link 27. 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 29.

Note that 30 is a control device that controls the rotation of the width adjustment motor 26 according to the coating width of the object W to be coated.

However, when painting the object W to be painted,
While tracking the column 6 in the transport direction of the object W to be coated, the lifting drive motor 11 is rotated in the forward and reverse directions to move the lifting body 8 up and down, thereby raising and lowering the lifting body supported by the lifting body 8. The coating machine 5 is suspended from the lifting frame 1 by raising and lowering the frame 1 according to changes in the upper surface shape of the object W to be painted.
The coating distance between A to 5C and the painted surface is maintained constant, and each of the paint machines 5A to 5C is tilted by each tilt motor 22 to face the painted surface.

At the same time, the motor 21 is rotated in a certain direction to run the drive chain 14 that is stretched between the sprockets 13U and 13D, and the drive chain 14 is installed coaxially with the sprocket 17 that is routed around the sprocket 17. By rotating the crank 16, the parallel links 4R and 4L, which suspend the paint sprayer 5C, are made to move in a pendulum manner by means of a connecting rod 29 that converts the rotational motion of the crank 16 into a 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 27 and 28, 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 this example, the elevating frame 1
Painting machines 5A to 5 suspended via parallel links to
Since C is made to reciprocate by a crank device 15 provided on the elevating body 8,
It is no longer necessary to provide the slider 44 and the slider drive motor 45 shown in FIG. 3 in the lift frame 1, and the weight of the lift frame 1 as a whole is significantly reduced.

In addition, by reducing the weight of the entire lifting frame 1, the lifting frame 1 can be made up of only the lifting body 8 provided on the pillar 6 by combining the pillars 6 into one as in the present invention.
can be supported.

If the lifting frame 1 is supported by a single support, the entire device can be significantly simplified and miniaturized, the installation space and equipment costs can be significantly reduced, and the painting booth in which the device is installed can be downsized. In addition, there is an excellent effect that a wide working space can be secured within the painting booth.

In this example, when the coating width of the object W to be coated changes, the screw shaft 25 is rotated by the width adjusting motor 26, and the slide bases 24L and 24R, which are screwed together with the screw shaft 25, are moved toward or away from each other. By moving the coating machines 5A and 5C a certain distance in the direction of
move toward or away from each other depending on the coating width.

For example, when painting the roof surface of an automobile body, which is the object W to be painted, the slide bases 24L and 24R are moved a certain distance in the direction away from each other as shown in FIG. 5A
A link 27 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 28 as the fulcrum
At the same time, the amount of paint sprayed by the paint sprayers 5A to 5C is decreased so that the coating width becomes smaller.

This has the effect of uniformly painting the roof surface, which has a narrower coating width than 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. 3, the coating finish of the entire roof surface is very good.

[Effect of idea]

As described above, in the automatic painting device according to the present invention, the drive device for reciprocating the paint machine installed on the lifting frame is provided on the lifting body that supports the lifting frame, so the weight of the lifting frame can be reduced. be able to. By reducing the weight of the lifting frame, the lifting frame can be supported by a single support, making it possible to simplify and downsize the entire device and significantly reduce installation space and equipment costs. This has excellent effects, making it possible to reduce the size of the painting booth in which the device is installed, as well as increasing the work space within the painting booth.

Further, when the coating width of the object to be coated changes, uniform coating can be achieved by easily moving the coating machines located on the left and right sides of the central coating machine in directions toward or away from each other.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of an automatic painting device according to the present invention, Fig. 2 is a right side view thereof, Fig. 3 is a front view showing an example of its operation, and Fig. 4 is a front view showing a conventional device. . 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 1 equipped with coating machines 5A, 5B, and 5C is supported by an elevating body 8 that moves up and down along a support 6, and is arranged horizontally in a direction perpendicular to the conveyance path of the object W to be coated. In an automatic coating device that is configured to automatically move up and down according to changes in the top surface shape of W, the support 6 is erected only on either the left or right side across the conveyance path of the object W to be coated. One end of the elevating frame 1 is supported by an elevating body 8 disposed on the support column 6, and the elevating frame 1 is provided with a pendulum movement in a direction perpendicular to the conveyance path of the object W to be coated by a crank device 15 provided on the elevating body 8. Each pair of parallel links 2R and 2L, 3R and 3L, 4R and 4L
is attached, and each of the parallel links 2R and 2
Each painting machine 5A, 5B, 5C is suspended from the elevating frame 1 by L, 3R and 3L, 4R and 4L, and each of the parallel links 2R, 2L, 3R and 3
L, 4R, and 4L are connected to other adjacent parallel links via links 27 and 28, and the upper ends of the parallel links 3R and 3L, which hang the central sprayer 5B, are fixed at a fixed position on the lifting frame 1. The upper ends of each of the parallel links 2R and 2L, 4R and 4L that hang the left and right paint sprayers 5A and 5C are attached to slide bases 24R and 24L that are movable toward or away from each other along the elevating frame 1. Automatic painting equipment characterized by: