JPH03215698A - Automatic electrodeposition coating device for automobile - Google Patents

Abstract

PURPOSE:To drastically decrease the disposition space of a coating line by immersing a vehicle body in the state of supporting this body upright by means of a hanger into a coating material tank from above, running the vehicle body together with the hanger in the coating material tank to subject the body to electrodeposition coating and taking out the vehicle body upward. CONSTITUTION:A transporting car 15 stops temporarily and lowers the hanger 17 by a wire 16 when the transporting car 15 arrives at the inlet side of the coating material tank 23 in the state of supporting the vehicle body 20 upright to the hanger 17. A power receiving brush of the hanger 17 comes into contact with a power feed bar 24 and the vehicle body 20 is energized when the vehicle body 20 is immersed into the coating material tank 23 by the descending of the hanger. The hanger 17 is supported by a holder 25 of a conveyor 26 at this time and the vehicle body 20 is moved at a constant speed in the coating material tank 23 by the conveyor 26, by which the coating is executed. The transporting car 15 moves in synchronization with the hanger 17 as well. The transporting car 15 stops temporarily and a wire 16 is taken up to raise the vehicle body 20 supported by the hanger 17 when the vehicle body 20 arrives at the inlet side of the coating material tank 23. The vehicle body is transported to the next stage. The overall length and base area of the coating material tank 23 are decreased in this way.

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 electrodeposition coating apparatus for automobiles includes, for example, a paint tank 1 and an overhead container 2, as shown in FIG.

The paint tank 1 is formed such that bottom walls 1a on the carry-in side and the bottom wall 1a on the carry-out side are lowered and raised diagonally forward.

Since the overhead conveyor 2 is arranged along the bottom wall 1a of the paint tank 1, this overhead conveyor 2
Hangers 3 are attached at predetermined intervals to each hanger 3, and a vehicle body 4 is supported in the horizontal direction by each hanger 3.

The vehicle body 4 is immersed in the paint tank 1 by the movement of the overhead conveyor 2, and the surface thereof is coated with electrodeposition. At this point, when the electrodeposition coating is completed, a shower 6. Excess paint adhering to the car body 4 is sequentially washed away and collected in the cleaning tank 7 and the shower 8, and passes through the primary washing tank 9, the secondary washing tank 10, and the tertiary washing tank 2, and then to the air nozzle 12. The water is drained by

Note that 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 electrocoating apparatus for automobiles, the car body 4 is immersed in the paint tank 1 while being gradually lowered, and then gradually raised. There is a problem that the overall length becomes longer and more space is required for the arrangement of the coating line.

Therefore, the present invention provides an electro-deposition coating apparatus for automobiles that can significantly reduce the number of coating lines.

Means for Solving the Problem A hanger is supported so that it can be raised and lowered via a hanging tool on a self-propelled transport vehicle above, a vehicle body is supported on this hanger so that it can be suspended, and an electrode is installed below the transport path. A paint tank is arranged, and a conveyor capable of transporting the hanger in the lowered position is installed above the paint tank, and a power supply mechanism is provided that can supply power to the vehicle body through this hanger when the hanger is in the lowered position. ing.

When the vehicle body supported by the hanger is located above the paint tank by the self-propelled transport vehicle, the vehicle body is lowered together with the hanger by the hanging device and immersed in the paint tank.

In this state, the transport vehicle is moved at a predetermined speed, and the hanger that has descended with the vehicle body is transferred by the conveyor in the same way as the transport vehicle, making it possible to shorten the length of the paint tank in the transport direction and setting the immersion time of the vehicle body. increase the degree of freedom of

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

As shown in FIG. 1.2, a rail l4 serving as a transport path is provided on the ceiling of a factory or the like, and a plurality of self-propelled transport vehicles l5 are provided on this rail l4. A hanger 17 is attached to each transport vehicle 15 via a wire I6 as a hanging tool.

The wire l6 is designed to be able to be wound around the transport vehicle l5. Therefore, if the wire 16 is wound up, the hanger l
7 goes up, and if the wire 16 is extended, the hanger 17 goes down.

The hanger I7 is provided with hooks 18 for wires 16 at the front and rear, and the upper end of a support arm 19 is rotatably supported in the center, and the vehicle body 20 is supported in an upright state at the lower end of the support arm 19. .

Further, a power receiving brush 2l serving as a power feeding mechanism is attached to one side of the hanger 17.

A paint tank 23 equipped with a diaphragm electrode 22 as an electrode is disposed below the rail l4.

This paint tank 23 is a tank with a short overall length in which a vertical side wall 23a and a rear side wall 23b are formed, and a power supply bar 24 as a power supply mechanism that comes into contact with the power receiving brush 21 of the hanger 17 in the front and rear direction. is installed.

Therefore, the vehicle body 20 supported by the hanger 17 is energized from the power supply bar 24 via the power receiving brush 2l.

A conveyor 26 is disposed above the paint tank 23, which includes a holder 25 that supports the hanger 17 in the lowered position (at this time, the vehicle body 20 is immersed in the paint tank 23), and is capable of transporting the hanger 17. has been done.

In this embodiment, the conveyor 26 has a belt 28 (which may be a chain) wrapped around a sprocket 27, and a holder 25 is attached to the belt 28.

Note that the hanger 17 and the transport vehicle 15 and the hanger 17 and the conveyor 26 are each insulated.

FIG. 3 shows an electrodeposition coating line including the paint tank 23, and in front of the paint side 23 is a counter-transfer device (not shown) that flips the car body 20 approximately 90 degrees from a horizontal position to an upright position.
should be placed.

Further, behind the paint tank 23, a sub paint tank 29 is arranged as a pit for a circulation pump and to keep the liquid level of the paint tank 23 constant. A cleaning tank 3l and a shower 32 are arranged in sequence, and here the car body 2
Excess paint attached to the 0 is washed away and collected.

Further, behind the shower 32, a primary flushing tank 33, a shower 34 for secondary flushing, and a shower 35 for tertiary flushing are arranged, and dust is washed off here. An air nozzle 36 for draining water is arranged behind the shower 35.

A reverse transfer device (not shown) is arranged behind the air nozzle 36 to horizontally reverse the vehicle body 20 which has been reversed by approximately 90 degrees.

In this painting line, not only the paint tank 23 but also the cleaning tank 3I and the primary washing tank 33 are formed in the same shape as the paint tank 23.

According to the structure of the above embodiment, when the conveyance vehicle 15 reaches the entrance (conveyance side) of the paint tank 23 with the vehicle body 20 supported on the hanger 17, the conveyance vehicle 15 temporarily stops 1L and moves to the wire 16.
As a result, the hanger 17 is lowered.

When the hanger 17 comes to the lowered position, the vehicle body 20 is immersed in the paint tank 23 and comes into contact with the power receiving bracket 21 or the power supply bar 24 of the hanger 17, and the vehicle body 20 is energized. Also, at this time, the hanger 17 is supported by the holder 25 of the conveyor 26.

Thereafter, the vehicle body 20 is moved at a constant speed in the paint tank 23 by the conveyor 26 via the hanger 17, and the carrier 15 is also moved through the hanger 17.
(by leaving the wire l6 slack, the transport vehicle l5 can be moved in increments).

Then, when the vehicle body 20 moves to a position where it does not interfere, the next vehicle body 20 is similarly immersed in the paint tank 23.

When the vehicle body 20 reaches the exit side (conveyance side), the carrier vehicle 15 temporarily stops, and by winding up the wire 16, the vehicle body 20 supported by the hanger 17 is raised and transported to the next process.

In this way, the car body 20 is transferred in an upright state in the paint tank 23 without taking unnecessary routes, so the overall length and bottom area of the paint tank 23 can be reduced, and therefore the installation space for the painting line can also be reduced. It can be reduced.

Specifically, the conventional painting line shown in Figure 5 is about 100.
m, whereas the coating line of the embodiment shown in FIG. 3 could be shortened to about 50 m.

Further, since the hanger 17 is supported by the holder 25, the vehicle body 20 can be prevented from swinging while suspended by the wire 16.

Furthermore, since the transport vehicle 15 can be synchronized with the moving speed of the vehicle body 20 within the paint tank 23, the degree of freedom in setting the immersion time is increased.

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 20 is transported upright, most of the outside of the car body is a vertical surface. Therefore, the finished surface of the paint is also good.

Furthermore, since the vehicle body 20 is transported in an upright position, air pockets and paint buildup inside the vehicle body are reduced as in the conventional case, and paint defects such as air pockets and secondary sagging are reduced.

Effects of the Invention As described above, according to the present invention, the vehicle body can be lowered and immersed near the entrance of the paint tank, and the total length and bottom area of the paint tank can be reduced. This has the effect of reducing the installation area of the device.

Furthermore, since a conveyor is installed above the paint tank to be able to transfer the hanger in the lowered position, it is possible to prevent the vehicle body from shaking when the hanger is transferred with the hanger extended.

[Brief explanation of drawings]

Fig. 1 is a side view of the embodiment of the present invention, Fig. 2 is a front view of the same, Fig. 3 is a side view of the entire painting line, Fig. 4 is a side view of the conventional technique, and Fig. 5 is a conventional painting method. It is a side view of the whole line. I4...Rail (conveyance path), 15...Transportation vehicle, l6...
・Wire (hanging tool), l7...hanger, 20...car body, 2! ... Power receiving brush (power feeding mechanism), 22... Diaphragm electrode (electrode), 23... Paint tank, 24... Power feeding bar (
power supply mechanism), 26...conveyor.

Claims (1)

[Claims] (1) A hanger is supported by a self-propelled transport vehicle above so that it can be raised and lowered via a hanging device, the vehicle body is supported by this hanger so that it can be suspended, and a paint tank with an electrode is located below the transport path. A conveyor that can transport the hanger in the lowered position is installed above the paint tank, and a power supply mechanism is provided that can supply power to the vehicle body through this hanger when the hanger is in the lowered position. Features of automotive electrodeposition coating equipment.