JPH03196866A - Chain conveyer transfer type coating device - Google Patents

Abstract

PURPOSE:To attain smooth conveying for a long period by providing the water intrusion means consisting of a water vessel and a supersonic oscillator, and positively intruding water into the clearances between the structural elements of the chain of chain conveyer before works are mounted. CONSTITUTION:Painted works W are mounted on the chain conveyer 10 running around along a specified transfer passage to be transferred to a drying and baking furnace, etc. In this case, the water intrusion means 30 is disposed in the transfer passage before works W are mounted, which is provided with the water vessel 31 formed so as to allow a part of the conveyer 10 to be soaked and the supersonic oscillator 32 activating water in the water vessel 31, and constituted so that water is intruded into the clearances between the structural elements of the chain of conveyer 10, such as connecting pieces, rotary supporting axles, bushes, rollers and stopping pins. As a result, the coating liquid invasion into the clearance between the structural elements of the chain of conveyer 10 is prevented, and the chain conveyer is smoothly operated for a long period. This method gives no undesirably effect on the quality of coated film.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a coating device in which a workpiece is placed on a chain conveyor and transported.

[Prior art] An example of a coating device using a chain conveyor is shown in Figure 2.
It is shown in Figure 4.

In Fig. 2, 1 is a loading tank, 2 is an overflow tank,
5 is a drying and baking oven, 10 is a chain conveyor, and 20 is a tension applying means for applying a certain tension to the chain conveyor. 6 The chain conveyor 10 is guided by a plurality of sprockets 81 to S5 at a kite rail 17 degrees and moves in the direction of arrow R. It is formed with the one that accompanies it. The driving source is a motor 18.

Therefore, the workpiece W coated in the coating zone Pz is
It is moved in the directions of arrows Y and X, placed on the chain conveyor 10, and conveyed in the order of liquid draining zone QFZ-cleaning zone CLZ-draining zone WFZ-drying baking zone DZ-cooling zone CZ.

Here, the liquid draining zone QFZ is provided to collect the paint liquid adhering to the workpiece W and taken out by natural falling, and the fallen paint liquid forms part of the liquid circulation system of the electrodeposition tank 1. The water is collected in the overflow tank 2.

The tension applying means 20 is a slider 2 that is slidably mounted on a support 21, 21, as shown in FIGS. 3 and 4.
2.22 and each slider 22. Way 1 not directly connected to 22
-23.23. So, Subroken 1-
33. By rotatably supporting S4 on each slider 22.22, it is possible to apply tension to the chain 11 of the chain conveyor 10 according to the weight of the ways 1 to 23.23.

[Problem to be Solved by the Invention 1] By the way, as shown in FIGS. 5 and 6, the chain 11 is formed by being rotatably supported by adjacent connecting pieces 12 and 12, that is, both connecting pieces J' 112,12
The rotating support shaft 13 is inserted into the shaft, and a first pin 16 is driven into the other end to prevent it from coming out. In addition, for convenience such as smooth conveyance of the workpiece W, the rollers 1-5 are mounted through bushings 14.6Also, the chain conveyor 1
0 components, especially each component 12 of the chain 11
13.14, 15.16 are assembled as functions for relative movement, so each component (12, 1314, 15, 1
6) Functionally necessary gaps C1 to C5 are inevitably formed between them. Since the coating film does not like oils and fats and is heated at a high temperature in the oven 5, lubricating grease or the like is not filled between each component.

Here, due to the diversification of layers, the properties (viscosity, etc.) of the coating 'f4 liquid and the form of the workpiece W vary, and - the varnish 1 to
Since reduction is required and the structure of the chain conveyor 10 is becoming more complex, depending on the combined state of these, paint liquid that naturally falls from the workpiece W in the liquid drainage zone QFZ may enter the above-mentioned gaps 01 to C5. If you leave the leak that is forming, the paint etc. will solidify and the chain 1
As a result, the smooth running and conveyance of the chain conveyor 10 is hindered, and furthermore, the chain 11. This may lead to damage to the sprocket S, etc.

To deal with this, it is possible to strengthen the spray water in the downstream clean zone CLZ, but no matter how powerful the spray is, once the paint has penetrated between the elliptical elements, it will solidify over time. In addition, since no relative movement occurs between the respective constituent elements in the zones (L, Z, etc.), it is impossible to eliminate the coating etc. until reaching the drying oven (N1 zone DZ).

In addition, this problem is not limited to the coating process or electrodeposition method.
For example, it also commonly appears in the case of other methods such as the dip coating method.

An object of the present invention is to provide a chain conveyor conveyance type coating device that can prevent paint liquid from entering between the chain components of the chain conveyor and from solidifying to ensure smooth operation and a high-quality paint film. There is a particular thing.

[Means for Solving Problem 1] The present invention actively allows water that does not affect the quality of the coating film to enter the gaps between the chain components of the chain conveyor, so that there is no room for the coating solution to enter. This configuration achieves the above object.

That is, in a coating device that is horizontally 12 tons so that coated workpieces are placed on a chain conveyor that accompanies a predetermined movement route and transported to a drying and baking oven, etc., a part of the chain conveyor is formed so that it can be immersed. A water infiltration means, which includes a water tank and an ultrasonic oscillator for activating the water in the water tank, and is configured to allow water to enter the gap between the chain components of the immersed chain conveyor, is mounted on the workpiece. It is characterized in that it is arranged in the movement route before being placed.

[Function] According to the present invention, a part of the chain conveyor that accompanies the moving route is immersed in the water tank before the coated work is placed thereon. Water activated by the ultrasonic oscillator is then received in the gaps between the chain components of the chain conveyor.

Therefore, when a workpiece is placed, the gaps between the components are filled with water, so even if paint liquid adheres from the workpiece afterwards, there is no room for the paint liquid to enter the gap. Therefore, the chain conveyor ensures smooth operation and ensures high quality coating because water does not have a negative effect on the quality of the coating.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of essential parts showing an embodiment of the present invention.

The basic structure of this coating apparatus is the same as that of the conventional structure shown in FIGS. 1 to 3 described above, and a water intrusion means 30 is provided. Further, the tension applying means 20 is configured to skillfully utilize a water tank 31 forming the water intrusion means 30.

Note that the same reference numerals are given to the parts common to the conventional structure, and the explanation thereof will be simplified or omitted.

Now, before the work W is placed on the water intrusion means 30, the chain components (12, 13,
14, 15, 16), and is a means for actively infiltrating water into the gaps (01 to C5), and in this embodiment, a water tank 31 arranged at an angle and a superfluous liquid that imparts activity to the water in this tank are used. It is formed from a sonic wave oscillator 32 and is disposed on the side of the electrodeposition tank 1.

Here, the water tank 31 is attached to sliders 22.22 that are slidably fitted to the supports 21' and 21, and sprockets S3 and S4 are rotatably attached to the sliders 22.22, respectively. .

Therefore, the water tank 31 also forms a part of the tension applying means 2o and functions as a weight. Note that 33 is an overflow tank.

Furthermore, the sprocket s4 on the left side in FIG. 1 is mounted at a higher position than the sprocket S3 on the right side. Therefore, after passing through the sprocket S2, a part of the chain conveyor 1o, that is, a part of the chain 11, is deeply immersed in water in the water tank 31 by the sprocket S3, and as it passes through the ultrasonic oscillator 32, the degree of immersion becomes shallower and becomes less connected to the sprocket S4. When they meet, they separate from the water. This makes it possible to minimize water droplets attached to the surface of the chain 11 and taken out.

Next, the effect will be explained.

A portion of the chain 11 whose direction has been changed by the sprocket S3 is deeply immersed in the water tank 31 and moves to the left along the transfer path R in FIG. Then, each component (1
2, 13, 14, 15, 16) shown in FIG. 5, water energized by the ultrasonic oscillator 32 enters. In other words, the minute water droplets are energized by the bursting force of the excited R cells, so the small gap C1
~Water can also enter C5 from all directions.

After that, gradually reduce the immersion level and move.

By the time the chain 11 reaches the sprocket S4, the water has separated, so water droplets adhering to the surface of the chain 11 are quickly removed, and the amount of water taken out can be minimized.

Then, the chain 11 is filled with water in the gaps 01 to C5.
A workpiece W coated with electrodeposition is placed on top of the sprocket S5 before passing through the sprocket S5.

At this time, excess adhering paint liquid drips from the workpiece W, but
Since the gaps 01 to C5 of each component are filled with water, there is no room for the paint liquid to enter. The fallen paint liquid is collected in a lower overflow tank 2 and recycled.

Subsequently, the chain 11 moves the workpiece W to the liquid draining zone QFZ.
From there, it is transported to the clean zone CLZ and the draining zone WF2.

There is no gap during this transportation or at the entrance of the drying and baking furnace 5.
Even if the water that has entered and adhered to gaps 01 to C5 evaporates naturally or is heated, there is no problem because there is no new chance for the paint liquid to enter the gaps 01 to C5.

Therefore, each component of the chain 11 (12°, 13.
14.15.16) Since the chain conveyor 10 is not integrally joined due to solidification of paint or the like, it properly engages with the sprocket S1, and the chain conveyor 10 runs smoothly.

According to this embodiment, a water intrusion means 30 consisting of a water tank 31 and an ultrasonic oscillator 32 is provided, and the gap between each component (12 to 16) is zero before the workpiece W is placed.
Since the structure is such that water is actively infiltrated and filled into gaps 01 to C5, the paint liquid falling from the workpiece W can fill the gaps 01 to C5.
Chain conveyor 1 does not invade or solidify into 5.
0 smooth operation can be guaranteed for a long period of time.

Further, the water intrusion means 30 has a simple structure consisting of a water tank 31 and an ultrasonic oscillator 32, so it is easy to incorporate and is low cost.

Furthermore, since the liquid that enters and fills each gap 01 to C5 is water, it does not adversely affect the quality of the coating film and the running cost is low.

Further, the water tank 31 is arranged at an angle and has sprockets S3 on both sides. Since S4 is arranged at different levels, chain 1
Useless water adhering to the outer peripheral surface of 1 can be quickly removed and reused.

Furthermore, since the water tank 31 constitutes a part of the tension applying means 20 that sets the tension of the chain 11, the conventional weight can be reduced or eliminated.

[Effects of the Invention] The present invention has a structure in which a water infiltration means consisting of a water tank and an ultrasonic oscillator is provided to actively seal water into gaps between chain components of a chain conveyor before placing a workpiece thereon. This eliminates the conventional problem of integrally joining the components by solidifying the paint liquid that enters the gap, and
It is possible to achieve smooth transportation and high quality coating over a long period of time.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention, Figs. 2 to 6 show a conventional chain conveyor conveyance type coating device, Fig. 2 is an overall configuration diagram, and Fig. 3 is a sectional view of main parts. Diagram 4 for explaining the process of placing a workpiece on a chain conveyor
The figure is a schematic diagram based on the arrow line ■-■ in FIG. 1, FIG. 5 is a plan view with a part of the chain in section, and FIG. 6 is a side view. DESCRIPTION OF SYMBOLS 1...Electrodeposition bath, 5...Drying baking oven, 10...Chain conveyor, 11...Chain 12.13,14,15.16...9 rotation support shaft of the connecting piece which is a chain component , Bushu. Roller 1 fixing pin, 20... Tension applying means, 30... Water penetration means, 31... Water tank, 32... Ultrasonic oscillator.

Claims (1)

[Claims] (1) In a coating device configured to place a coated workpiece on a chain conveyor that circulates along a predetermined travel path and transport it to a drying and baking oven, a portion of the chain conveyor is formed so that it can be immersed. The workpiece is provided with a water infiltration means configured to allow water to enter a gap between the chain components of the immersed chain conveyor, including a water tank in which the water is immersed and an ultrasonic oscillator that activates the water in the water tank. A chain conveyor conveyance type coating device, characterized in that it is disposed in the movement path before being placed.