JPH0580274B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves moving a coating machine up and down and tilting it along the painting surface of an object to be coated, which is conveyed by a conveyor or the like, so as to adapt to the shape of the object. The present invention relates to an automatic coating device configured to apply coating.

[Prior art and its problems]

For example, automatic painting equipment that continuously paints the front, top, and rear surfaces of an automobile body is
As shown in FIG. 3, an elevating frame 31 that is raised and lowered according to the shape of the automobile body 30 being transported at a predetermined speed is arranged horizontally and perpendicular to the conveying path of the automobile body 30. A slider 32 is provided which can be reciprocated with a predetermined stroke while sliding along the horizontal direction, and
A plurality of electrostatic coating machines 33A are attached to the slider 32,
33B are generally installed at predetermined intervals.

Then, the elevating frame 31 is attached to the automobile body 30.
In addition to raising and lowering according to the shape and conveyance speed,
The slider 32 provided on the elevating frame 31 is moved back and forth, and the electrostatic coating machines 33A and 33B attached to the slider 32 are moved to the automobile body 30.
Each electrostatic coating machine 33
The atomizing heads 35 of A and 33B are reciprocated while always directly facing the painted surface 30a of the automobile body 30 while maintaining a constant painting distance to apply uniform coating.

However, in this way, each electrostatic coating machine 33
If A and 33B are to be tilted individually, a tilt drive mechanism and positioning mechanism will be required for each sprayer, which will complicate the overall coating structure.
A drawback is that it is difficult to position each sprayer so that it tilts at the same angle.

Furthermore, when each electrostatic atomizer 33A, 33B is tilted, excessive rotational force acts on the various atomizer pipes connected to each of these atomizers, resulting in the pipes falling out, breaking, or being damaged. was occurring.

Each of the electrostatic atomizers 33A and 33B is equipped with compressed air for an air motor that rotates the atomizing head 35, compressed air for shaping air that adjusts the spray pattern of the paint sprayed from the atomizing head 35, or atomizer. A large number of air supply hoses 36 supply compressed air for cleaning the chemical head 35,
Since a large number of pipes are connected, such as 36... and paint supply hose 37, each electrostatic atomizer 33
The tilt drive mechanisms of A and 33B were subject to a large load due to the rigidity of these pipes.

Therefore, the driving force of the tilt drive mechanism has to be increased, resulting in a problem of increased equipment costs and power costs. In particular, the rotation angle for tilting the sprayers 33A and 33B is up to 180°, and each pipe 3
Since the bending radius of 6 and 37 becomes very large, a very large rotational driving force is required.

In addition, each pipe connected to each electrostatic atomizer 33A, 33B needs to have an extra length corresponding to the tilt radius of each atomizer, so these extra lengths are exposed to the outside. This will seriously spoil the appearance of the entire device, and the lifting frame 31 will be damaged when tilting.
There was a problem that dirt and dust would fall off as it slid while rubbing against the surface of other objects.

[Purpose of the invention]

Therefore, the present invention significantly simplifies the tilt drive mechanism, positioning mechanism, etc. that tilts the paint sprayer attached to the lifting frame, and greatly improves the positioning accuracy, as well as tilts the paint sprayer. In such cases, excessive rotational force may be applied to the piping connected to the painting machine, causing the piping to fall off, break, or be damaged, or the rigidity of the piping may place an excessive load on the tilt drive mechanism. To provide an automatic painting device which can prevent dirt, dust, etc. from falling due to rubbing of the surface of a lifting frame by the excess length of the piping, and damage to the appearance of the device.

[Structure of the invention]

In order to achieve this object, the present invention has a coating machine attached to an elevating frame that is disposed perpendicular to the conveyance path of the object to be coated and that can be vertically raised and lowered. In an automatic coating device that lifts and lowers the frame so as to maintain a constant painting distance from the painting surface and tilts it so as to directly face the painting surface, both ends of the lifting frame are rotatably supported by a rotating shaft, and the lifting frame is moved up and down to be coated. The coating machine is tilted by rotating at a required rotation angle in the front-back direction along the conveyance path of the object, and piping for the coating machine pivotally supports the rotating shaft. It is characterized in that it is connected to the coating machine via a pipe line in the rotating shaft that is connected to a pipe line provided on a rotary bearing and communicates from the pipe line through a rotary joint.

[Action of the invention]

According to the present invention, the paint sprayer is tilted by rotating the lifting frame to which the paint sprayer is attached at a required rotation angle. There is no need to provide a tilt drive mechanism or a positioning mechanism, and positioning accuracy is also significantly improved.

In addition, the pipe for the paint sprayer is connected to the pipe provided in the rotary bearing that pivots the rotating shaft that rotates the lifting frame, and the pipe in the rotating shaft is connected to the pipe through the rotary joint. Since the piping is connected to the coating machine through the piping, the rotational force when tilting the coating machine does not act on the piping at all.

Therefore, it is possible to prevent the piping from falling off, breaking or being damaged due to unreasonable stress acting on the piping, and at the same time it is possible to significantly reduce the load on the tilt drive mechanism.

Furthermore, since it is not necessary to provide each pipe with an extra length corresponding to the tilt radius of the coating machine, the pipe arrangement becomes very compact and looks good.

Furthermore, since the part of the piping connected to the paint sprayer is rotated together with the lift frame when the lift frame is rotated and the paint sprayer is tilted, this part may rub against the surface of the lift frame and remove dust. There is no risk of dropping dirt or dust.

〔Example〕

Embodiments of the present invention will be specifically described below based on the drawings.

FIG. 1 is a front view schematically showing an example of an automatic painting apparatus according to the present invention, and FIG. 2 is a sectional view showing the main parts thereof.

In the figure, reference numeral 1 denotes an elevating frame that is disposed horizontally orthogonally to the conveyance path of the object to be coated 2 and is raised and lowered according to the shape and conveyance speed of the object to be coated. Standalone electrostatic coating machines 3A, 3B, and 3C are installed at predetermined intervals.

In addition, the lifting frame 1 has both ends connected to the object 2 to be coated.
A pair of links 4A, 4B which are pendulum-moved in a direction perpendicular to the conveyance path of the workpiece 2 are It is suspended horizontally so that it can rotate back and forth along the conveyance path.

The upper ends of the links 4A and 4B are brackets 7 and 7 of a lifting drive device that lifts and lowers the lifting frame 1.
It is rotatably mounted and supported.

Further, a tilting air motor 8 which is driven to rotate in forward and reverse directions is disposed on the upper end side of one of the links 4A, and a driving sprocket 9 fixed to the rotating shaft of the air motor 8 and a rotating sprocket that supports the lifting frame 1. A drive chain 11 is mounted in parallel with a driven sprocket 10 fixed to the shaft 5.

Further, a long hole 13 is formed in the other link 4B along the longitudinal direction, and in the long hole 13, a connecting rod 15 of a swinging device 14 that cranks the link 4B to make a pendulum movement slides up and down. possible to be connected.

16, 16... are a plurality of air supply hoses shown as an example of piping for a coating machine, and each air supply hose 16 is connected to a conduit 17 provided in the rotary bearing 5B, respectively, as shown in FIG. A conduit 20 in the rotating shaft 6 that is connected to the rotary joint 18 by a joint 18 and communicates from the conduit 17 through the rotary joint part 19.
It is connected to the electrostatic coating machines 3A to 3C via.

That is, the air supply hoses 16, 16, . . . that supply compressed air for driving the air motor, compressed air for shaping air, compressed air for cleaning, etc. to the electrostatic coating machines 3A to 3C, respectively, are connected to the pneumatic control panel. 21 and the hose section 16b directly connected to the sprayer, all pass through a conduit 20 provided within the rotating shaft 6 that rotatably supports the elevating frame 1. Along with being piped to
Hose portion 16 connected to conduit 17 of rotation bearing 5B
a and a hose section 16b attached to the elevating frame 1 and connected to each rotatable coating machine are connected to each other via a rotary joint section 19.

When painting an object 2 to be coated that is conveyed at a predetermined speed by a floor conveyor or the like, although not shown, an elevating frame is moved by an elevating drive device to adjust the shape and conveyance of the object 2 to be coated. At the same time, the rocking device 1
4 is actuated to cause the links 4A, 4B to make a pendulum movement, and the lifting frame 1 suspended from the links 4A, 4B is caused to reciprocate along the painted surface 2a of the object 2 to be coated.

At that time, when tilting the atomizing head 22 of each electrostatic atomizer 3A to 3C so as to directly face the painting surface according to the change in shape of the painting surface 2a of the object 2,
The tilting air motor 8 is driven to rotate the elevating frame 1 supported by the rotating shaft 6 at a required rotation angle in the front-rear direction along the conveyance path of the object 2 to be coated.

As a result, the electrostatic coating machines 3A to 3C attached to the elevating frame 1 rotate integrally and are tilted to the same inclination angle.

Therefore, as in the past, each electrostatic coating machine 3A~
Since it is not necessary to provide a tilt drive mechanism or a positioning mechanism for each 3C, the mechanism of the entire device can be simplified and the positioning accuracy can be significantly improved.

In addition, the air supply hoses 16, 16, . , a configuration in which the hose portion 16b directly connected to each sprayer is connected by a conduit 17 of the rotary bearing 5B and a conduit 20 of the rotary shaft 6, which communicate via a rotary joint portion 19. Therefore, each of the electrostatic coating machines 3A to 3 is connected to each of the air supply hoses 16, 16...
No rotational force is applied when tilting C.
Therefore, these air supply hoses 16, 16...
There is no risk of accidents such as falling off, breakage, or damage, and at the same time, the load on the air motor 8 that rotates the elevating frame 1 and tilts each sprayer can be extremely small.

In addition, since each electrostatic coating machine 3A to 3C is configured to rotate together with the lifting frame 1, the conduit 20 of the rotating shaft 6 supporting the lifting frame 1
There is no need to provide any extra length in the hose portion 16b that is directly connected to each sprayer.

Further, since there is no need to provide an extra length in the hose portion 16b in this way, and each of the electrostatic coating machines 3A to 3C to which the hose portion 16b is connected rotates and tilts together with the lifting frame 1. When tilting each coating machine, the hose portion 16b does not rub the surface of the elevating frame 1, thereby preventing dirt and dust attached to the elevating frame 1 from falling. Therefore, there is no possibility that coating defects such as spots will occur on the coated surface 2a of the object 2 to be coated.

Furthermore, the air supply hoses 16, 16, . . . are made very compact and look good.

In the above embodiment, the air supply hose 16 has been described as an example of the pipe for a coating machine, but it may also be a paint supply hose.

Further, the coating machine is not limited to an electrostatic coating machine, and various types of coating machines such as an air atomization type can be used.

〔Effect of the invention〕

As described above, according to the present invention, the tilt drive mechanism and positioning mechanism for tilting the coating machine attached to the vertical frame according to the shape of the object to be coated can be significantly simplified compared to conventional ones, and the positioning mechanism can be Accuracy can be greatly improved, and when tilting the paint sprayer, there is no possibility that excessive rotational force will be applied to the various piping connected to the paint sprayer, such as the air supply hose or paint supply hose, causing the piping to fall out. The rigidity of the piping may cause an excessive load on the tilt drive mechanism, or the piping may scrape the surface of the lift frame and cause dirt or dust to fall, or the equipment may be damaged. It has a number of excellent effects such as preventing any damage to the appearance of the product.

[Brief explanation of drawings]

FIG. 1 is a front view schematically showing an example of an automatic painting apparatus according to the present invention, FIG. 2 is a sectional view showing the main parts thereof, and FIG. 3 is an explanatory diagram showing a conventional apparatus. Explanation of symbols, 1...Elevating frame, 2...Object to be coated, 3A, 3B, 3C...Electrostatic coating machine, 5A, 5
B... Rotating bearing, 6... Rotating shaft, 8... Tilt air motor, 16... Air supply hose (piping for paint machine), 17... Piping, 19... Rotary joint, 20... Piping Road.

Claims (1)

[Scope of Claims] 1. Painters 3A, 3B, and 3C attached to an elevating frame 1 arranged orthogonally to the conveyance path of the object 2 to be coated and vertically raised and lowered are moved according to the shape of the object 2 to be coated. In an automatic painting device that is raised and lowered so as to maintain a constant painting distance from the painted surface 2a and tilted so as to directly face the painted surface 2a, both ends of the lifting frame 1 are rotatably supported by a rotating shaft 6. By rotating the elevating frame 1 at a required rotation angle in the front-rear direction along the transport path of the object to be coated 2, the coating machines 3A, 3B, and 3C are tilted; A rotary bearing 5 on which a pipe 16 for the paint machine pivots the rotary shaft 6
A, 5B, and is connected to the coating machines 3A, 3B, 3C via a pipe 20 in the rotating shaft 6, which communicates from the pipe 17 through a rotary joint part 19. Automatic painting equipment characterized by: 2. The automatic painting apparatus according to claim 1, wherein the piping 16 is an air supply hose or a paint supply hose.