JPH03223494A - Electrodeposition coating device for automobile - Google Patents

Abstract

PURPOSE:To miniaturize the coating device for the automobile by transferring the automobile body in a paint tank in a vertical position, lowering the body on the inlet side of a paint tank and raising the body on the outlet side. CONSTITUTION:The automobile body 14 introduced in a horizontal position is turned to an angle of about 90 deg. by a turning and transferring device 15. The paint tank 34 is arranged on the outlet side of the device 15. A self- traveling carrier 26 provided with a hanger 28 for holding the body 14 capable of being lifted up and down and moved is furnished above the tank 34. A conveyor 38 capable of transferring the lowered hanger 28 is set on the tank 34. A power is supplied to the body 14 by a feeder mechanism through the hanger 28. The body 14 is transferred in the tank 34 in a vertical position, lowered on the inlet side of the tank 34 and raised on the outlet side. Consequently, the coating quality is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an electrocoating apparatus for automobiles.

2. Description of the Related Art A conventional electro-deposition coating apparatus for automobiles includes, for example, a paint tank 1 and an overhead conveyor 2, as shown in FIG.

The paint tank 1 is formed such that the bottom walls 1a on the carry-in side and the carry-out side stand up diagonally, and the overhead conveyor 2 is arranged along the bottom wall 1a of the paint tank 1.

Hangers 3 are attached to the overhead conveyor 2 at predetermined intervals, and a vehicle body 4 is supported by each hanger 3 in a horizontal position.

The vehicle body 4 is immersed in the paint tank 1 by the movement of the overhead conveyor 2, and electrodeposition coating is applied to the surface of the vehicle body 4.

When the electrodeposition coating is completed, the shower 6,
Excess paint adhering to the car body 4 is washed away and collected in the washing tank 7 and the shower 8, and then passed through the primary washing tank 9, the shower 10 for the secondary washing and the shower 11 for the tertiary washing, and then by the air nozzle 12. The vehicle body 4 is drained.

Incidentally, reference numeral 13 indicates a sub-paint tank that keeps the liquid level of the paint tank 1 constant.

As this type of technology, for example, Japanese Patent Application Laid-Open No. 55-34103
There is one shown in the publication.

Problems to be Solved by the Invention However, in the above-mentioned conventional electro-deposition coating apparatus for automobiles, the car body 4 is immersed in the paint tank l while being gradually lowered, and is gradually raised. There are problems in that the total length of the paint tank 1 becomes longer, the entire apparatus becomes larger, and more space is required for the arrangement of the coating line.

Furthermore, it is known that the finish of electrodeposition coating is better on a vertical surface than on a horizontal surface, but since the car body 4 attached to the hanger 3 in a horizontal position has more horizontal surfaces, it is necessary to improve the finish surface. The problem is that it becomes difficult.

Since the car body 4 is painted horizontally, there is a problem in that relatively many air pockets and paint puddles occur on horizontal surfaces, which tends to cause paint defects.

SUMMARY OF THE INVENTION Accordingly, the present invention provides an electro-deposition coating apparatus for automobiles that can shorten the line by downsizing the apparatus, improve coating quality, and reduce costs.

Means for Solving the Problem A counter-transfer loading device is provided that flips the vehicle body transported in a horizontal position approximately 90 degrees with its front end or rear end facing upward, and a coating tank is placed on the unloading side of this counter-transfer loading device. Above the paint tank, there is a self-propelled transport vehicle with a hanger that holds the car body that can be moved up and down and transported, and above the paint tank there is a conveyor that can transport the hanger in the lowered position. is installed, and a power supply mechanism that can supply power to the vehicle body via a cage is provided.

The vehicle body, which has been brought in in a working horizontal position, is reversed approximately 90' with its front end or rear end upward by the reverse transfer device, and its position is changed from horizontal to vertical, and is supported on a hanger of a self-propelled transport vehicle. be done.

When the vehicle body supported by the hanger reaches above the paint tank by the transport vehicle, the hanger descends while supporting the vehicle body, and the vehicle body is immersed in the paint tank.

In this state, the transport vehicle is moved at a predetermined speed, and the hanger that has descended together with the vehicle body is also transferred by the conveyor in the same way as the transport vehicle, and the vehicle body, which is energized by the power supply mechanism, is painted.

Therefore, the length of the paint tank in the transport direction can be shortened, and the vehicle body can be painted in a vertical position that is advantageous for the finish of the paint, thereby improving the quality of the paint.

Example Embodiments of the present invention will be described below with reference to the drawings.

As shown in Figures 1.4 to 6, the car body 14 placed in a horizontal position on the delivery side of the painting line is turned over approximately 90 degrees with the front end (or rear end of the car body) upward, and then placed in a vertical position. A counter-transfer device 15 is installed to change the attitude.

The counter-transfer loading device 15 has four drive gears 17 provided on a frame 16 (some of which may be driven gears), and a swing frame 18 placed on the drive gears 17.

The swing frame 18 has an arc-shaped rack 19 that meshes with the drive gear 17, a floor frame 2O for mounting and fixing the vehicle body 14 at the transfer standby position, and a support frame 21 rising along the rear end of the vehicle body. ing.

On the other hand, above the painting line, a conveyor 23 is installed continuously from the pre-treatment process line to an overboard equipped with a hanger 22 that supports the vehicle body 4 in a horizontal position.

A rail 25 is disposed above the painting line, including above the counter transfer device 15, along the overhead conveyor 23, and on this rail 25, a plurality of self-propelled carriers 26
is provided.

The transport vehicle 26 is provided with a windable wire 27,
A hanger 28 for suspending the vehicle body 14 above the reverse transfer device 15 is attached to this wire 27.

The hanger 28 has a pair of hanger arms 29 extending downward.
is provided so that it can be opened and closed in the vehicle width direction, and this hanger arm 2
In the middle of 9 is a bin 3 at the tip of bracket B that is inserted into a tie-down hook 30 provided at the front end of the vehicle body 14.
1 is attached (see Figure 4).

A stopper 32 is attached to the lower end of the hanger arm 29 and comes into contact with the lower surface of the vehicle body 14 suspended from the hanger 28.

Further, as shown in FIG. 3, a power receiving bracket 33 as a power feeding mechanism is attached to one side of the hanger 28.

Therefore, when the wire 27 is wound up, the hanger 28 is raised, and when the wire 27 is extended, the hanger 28 is lowered.

A table lifter (not shown) is disposed adjacent to the counter-transfer loading device 15, and the table lifter is used to transfer the vehicle body 1 supported by the hanger 22 of the overhead conveyor 23 onto the counter-transfer loading device 15. It has become.

A paint tank 34 is arranged on the unloading side of the counter-transfer loading device 15.

The paint tank 34 is provided with a diaphragm electrode 35 inside.
Specifically, it is a tank with a short overall length in which both the carry-in side wall 34a and the carry-out side wall 34b are vertically formed, and the power receiving brush 3 of the hanger 28 of the carrier vehicle 26 is located in the carry-in/out direction.
A power supply bar 36 as a power supply mechanism that comes into contact with the power supply bar 3 is disposed.

Note that the power supply bar 36 is insulated from the paint tank 34,
Electricity is supplied to the vehicle body 14 supported by the hanger 28 from the power supply bar 36 through the power receiving brush 33 .

The upper part of the paint tank 34 is located at a lowered position (vehicle body 1
A conveyor 38 is disposed, which is provided with a holder 37 that supports the hanger 28 at a position (where the hanger 4 is immersed in the paint tank 34) and is capable of transporting the hanger 28.

The conveyor 38 has a sprocket 39 in this embodiment.
A belt 40 (which may be a chain) is wound around the belt 40, and the holder 37 is attached to the belt 40.

Note that the hanger 28 and the conveyor 38 and the hanger 28 and the transport vehicle 26 are each insulated.

FIG. 7 shows an electrodeposition coating line including the above-mentioned anti-transfer device 15 and the paint tank 34. On the discharge side of the paint tank 34, there is a bit for a circulation pump and a device to keep the liquid level in the paint tank 34 constant. A sub-paint tank 41 for maintenance is arranged, and a shower 42, a cleaning tank 43 and a shower 44 are installed on the discharge side of the sub-paint tank 41.
are sequentially arranged so that excess paint adhering to the vehicle body I4 is washed away and collected.

Further, on the discharge side of the shower 44, a primary flushing tank 45, a shower 46 for secondary flushing, and a shower 47 for tertiary flushing are arranged, and dust is washed off here. An air nozzle 48 for draining water is arranged on the discharge side of the shower 47.

The above-mentioned reverse transfer device 15 is arranged behind the air nozzle 48, and the vehicle body 14 is reversed and returned to a horizontal position, and the receiver is transferred to the hanger 22 of the overhead conveyor 23 via a power lifter. .

In this painting line, the cleaning tank 43 and the primary washing tank 45 are miniaturized by having vertical wall portions on the carry-in side and the carry-out side, similar to the paint tank 34.

According to the structure of the above embodiment, the vehicle body 14 supported by the hanger 22 of the overhead conveyor 23 and transported in a horizontal position from the pre-processing step is transferred to a power lifter (not shown) at a predetermined position, and from the power lifter as shown in FIG. It is transferred to the reverse transfer loading device 15 in the standby position shown in FIG.

When the vehicle body 14 is placed on the counter-transfer loading device 15, the carrier vehicle 26 traveling on the rails 25 stops at a predetermined position.
The wire 27 is extended and the hanger 28 is lowered.

When the hanger 28 finishes descending, the hanger arm 29
is operated to close, and the bin 31 is connected to the tie-down hook 3 of the vehicle body 14.
0 (see Figure 4).

Next, as shown in FIG. 5, as the drive gear 17 rotates, the swing frame 18 begins to rotate via the rack 19, and in response, the hanger 28 rises, and the floor frame 20 stands up. When the swing frame 18 rotates to a position where the support frame 21 is approximately horizontal (rotated by approximately 85 degrees), the vehicle body 14 is released from the floor frame 20, and the vehicle body 14 is transferred to the hanger 28 (fifth and sixth (see figure)
.

Then, the vehicle body 14 suspended in a vertical position at the raised position of the hanger 28 is transported to the paint tank 34 by the transport vehicle 26.

When the vehicle body 14 reaches the loading side of the paint tank 34, the transport vehicle 2
6 is temporarily stopped, the wire 27 is extended, and the hanger 28 is lowered.

When the hanger 28 comes to the lowered position, the vehicle body 14 is dragged into the paint tank 34, and the power receiving brush 33 of the hanger 28 comes into contact with the power supply bar 36, and the vehicle body I4 is energized.

Further, at this time, the hanger 28 is supported by the holder 37 of the conveyor 38.

Thereafter, the vehicle body 14 is moved at a constant speed within the paint tank 34 via the hanger 28 by the two conveyors 38, and the transport vehicle 26 is also moved through the hanger 28.
(by leaving the wire 27 slack, the transport vehicle 26 can be moved in increments).

Then, when the car body 14 moves to a position where it does not interfere, the next car body 14 is immersed in the paint tank 34 in the same way, and when the car body 14 reaches the unloading side, the carrier 26 temporarily stops and winds up the wire 27. , the vehicle body 14 supported by the hanger 28 is raised and transported to the next process.

In this way, the vehicle body 14 is placed in the paint tank 34 in a vertical position.
Moreover, the paint tank 34 is transferred without taking unnecessary routes.
The total length and bottom area of the apparatus can be reduced to reduce the size of the apparatus, and therefore the installation space for the coating line can be reduced.

Specifically, the conventional painting line shown in Figure 9 is about 10
The painting line of the embodiment shown in FIG. 7 could be shortened to about 50 m, whereas the painting line of the embodiment shown in FIG.

Furthermore, since the hanger 28 is transferred while being supported by the holder 37, the vehicle body 14 can be prevented from swinging while suspended by the wire 27.

Since the transport vehicle 26 can be synchronized with the moving speed of the vehicle body 14 within the coating tank 34, the degree of freedom in setting the immersion time is increased.

Furthermore, it is known that the finished surface of the electrodeposition coating is better on a vertical surface than on a horizontal surface, but in this example where the car body I4 is transported in a vertical position, most of the outside of the car body is a vertical surface. The finished surface of the paint will also be good.

Since the vehicle body 14 is transported in the paint tank 34 in a vertical position, air pockets and paint pools inside are reduced as in the conventional case, and painting defects such as air pockets and secondary sag are reduced.

As described in detail, according to the present invention, the vehicle body is transported in a vertical position within the paint tank, and is lowered on the loading side of the paint tank and raised on the unloading side, so that the vehicle body can be transported without taking a wasteful route. This has the effect of reducing the total length and bottom area of the paint tank, making the device more compact, and reducing the space required for the coating line.

In addition, since the vehicle body can be reversed by the anti-transfer device and immersed in the paint tank in a vertical position, it is possible to secure a large amount of vertical surface, which is advantageous in terms of improving the finish surface, and has the effect of improving the coating quality as described above. be.

[Brief explanation of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is a perspective view, FIG. 2 is a side view of the paint tank, FIG. 3 is a front view of the same, and FIGS. FIG. 7 is an explanatory side view of a coating line, FIG. 8 is a side explanatory diagram of a conventional paint tank, and FIG. 9 is a side explanatory diagram of a conventional coating line. 14... Vehicle body, 15. Reversing movement device, 26. Transport vehicle, 28. Hanger, 33. Power receiving plano (power feeding mechanism), 34
...Paint tank, 36...Power supply bar (power supply mechanism), 38
・Con hair. Figure 3 Figure 7 Figure 5 Figure 6

Claims (1)

[Claims] (1) Equipped with a counter-transfer loading device that inverts the vehicle body transported in a horizontal position by approximately 90° with its front end or rear end facing upward, and a paint tank is arranged on the unloading side of the counter-transfer loading device. A self-propelled transport vehicle is installed above the paint tank in which a hanger that holds the car body can be moved up and down and transported, and a conveyor that can transport the hanger in the lowered position is installed above the paint tank. An electro-deposition coating device for an automobile, characterized in that it is provided with a power supply mechanism capable of supplying power to a vehicle body through a hanger.