JPH051339Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a color change cleaning device for an automatic paint coating machine used for painting automobiles, etc.

[Conventional technology]

The paint colors of the objects to be painted, which are continuously brought in on a conveyor, are not always the same color, so it is necessary to change the colors.

When changing colors, it is necessary to clean the various valve units of the painting equipment, the hoses that feed the paint, and the paint machine to avoid color mixing. Furthermore, it is necessary to improve productivity by reducing the time required for this color change as much as possible.

Automatic painting machines generally have the following functions: In FIG. 4, a bell unit 39 to which a bell 28 is attached is suspended from an elevating arm 36 via an insulated swing arm 37, and is swingable by a reciprocating crankshaft 38.

The lifting arm 36 is supported by a machine body 33 so as to be able to rise and fall, and the machine body 33 is connected to a tracking device 34 that runs on a tracking rail 35.
is suspended. The bell 28 itself can swing (tilt) toward the object to be coated.

In this way, the movement of the bell 28 of the automatic coating machine is performed by vertical movement, rocking, tilting, and tracking device to move in synchronization with the object to be coated brought in by the conveyor, and its operating range is as follows. is wide.

To allow such a wide operating range, the hose for delivering the paint must be sufficiently long.

As shown in FIG. 4, a conventional automatic painting machine has a color change unit attached to a machine body 33, in which a one-color color valve 3, a two-color color valve 2, a cleaning thinner valve 4, and a cleaning air valve 5 are attached to a manifold 1. The bell unit 39 includes a dump valve 17 and a trigger valve 16 on the manifold 21.
A trigger dump valve (hereinafter referred to as T/D valve) 22 is provided, and a sprayer cleaning valve unit is attached to this T/D valve 22, which is connected to a manifold 32 provided with a soft thinner valve 23 and a soft air valve 24.

Then, the paint hose 40 connects the manifold 1 of the color change unit and the trigger valve 16 of the sprayer cleaning valve unit, while the drain hose 41 connects the dump valve 17 of the sprayer cleaning valve unit to the drain ejector box 31. was connected. 29 is Shroud.

In addition, Japanese Utility Model Application No. 59-10859 describes a technology in which a cleaning device exclusively for the bell is installed in order to prevent paint defects (spot defects) caused by adhesion of paint on the surface of the bell. Disclosed.

[Problem that the invention attempts to solve]

In the conventional automatic painting machine mentioned above, the color change unit attached to the machine body and the sprayer cleaning valve unit attached to the bell unit are directly connected by a hose, so the length of the hose is extremely long. .

As a result, there was a problem in that the time required for color change was extremely long (35 to 40 seconds, for example), resulting in extremely low productivity.

In addition, in this conventional example, the bell cup (shroud) and the ejector box are not connected with a drain hose, so quick spraying can only be done up to the dump valve of the sprayer cleaning valve unit, and when painting starts, this dump It takes time for paint to be supplied from the valve to the manifold to the bell.
There is a problem of low productivity.

[Means to solve the problem]

In order to solve the above problems, the present invention includes a color change unit in which a one-color color valve, a two-color color valve, a cleaning thinner valve, and a cleaning air valve are installed in the manifold, and a trigger valve, a dump valve, and a T/D valve in the manifold. A relay cleaning valve unit connected a cleaning thinner valve and a cleaning air valve to the T/D valve, a dump valve, a trigger valve, and a T/D valve were installed in the manifold, and a soft thinner valve and a soft air valve were connected to the T/D valve. a first cleaning system that includes a paint sprayer cleaning valve unit provided close to the paint sprayer, which extends from the manifold of the color change unit to the drain ejector box via the trigger valve and dump valve of the relay cleaning valve unit; A second cleaning system runs from the manifold of the intermediate cleaning valve unit to the drainage ejector box via the dump valve and trigger valve of the sprayer cleaning valve unit, and a second cleaning system runs from the manifold of the sprayer cleaning unit to the drain via the bell cup. It is characterized by comprising a third cleaning system leading to a liquid ejector box.

[Effect]

With the above configuration, during painting, the paint sent from the color change unit passes through the trigger valve and manifold of the relay cleaning valve unit, and then the paint passes through the trigger valve, manifold, and feed tube of the sprayer cleaning valve unit. It is supplied to Bell via.

Next, for cleaning at the time of color change, the trigger valve, dump valve, and T/D valve are installed in the manifold, and an intermediate cleaning valve unit is installed in which the cleaning thinner valve and cleaning air valve are connected to the T/D valve. The first pipe is connected to the drain ejector box via the trigger valve and dump valve of the relay cleaning valve unit.
A cleaning system and a second cleaning system that runs from the manifold of the relay cleaning valve unit to the drain ejector box via the dump valve and trigger valve of the paint sprayer cleaning valve unit are provided.
While simultaneously cleaning the cleaning system and the second cleaning system,
A dump valve, a trigger valve, and a T/D valve were installed in the manifold, and a paint sprayer cleaning valve unit, in which a soft thinner valve and a soft air valve were connected to the T/D valve, was installed close to the paint sprayer, so the first cleaning system By cleaning the third cleaning system by delaying the timing between the cleaning of the second cleaning system and the cleaning of the second cleaning system, it is possible to clean the third cleaning system without scattering residual paint around the area due to the rotation of the paint sprayer. Since the machine cleaning valve unit is provided close to the coating machine, even if the timing of the cleaning is delayed, the overall cleaning completion time is approximately the same.

Next, after cleaning is complete, a quick spray is performed in preparation for the next coat. During this quick spraying, the relay valve unit divides the system into the first, second, and third cleaning systems, and the sprayer cleaning valve unit includes a dump valve, a trigger valve, and a T/
Since the D valve is provided, the first and second
When cleaning of the cleaning system is completed, perform the first stage of spraying up to the dump valve of the paint sprayer cleaning valve unit, then after completing the cleaning of the third cleaning system,
This third cleaning system is connected to the drainage ejector box via a bell cup with a hose.
It is possible to prevent paint from dripping from the sprayer and perform the second stage of spraying up to the sprayer.

〔Example〕

An embodiment of the present invention will be described in detail below.

In FIG. 1, the solid line represents the first cleaning system, the dotted line represents the second cleaning system, and the two-dot chain line represents the third cleaning system.

A two-color color valve 2, a single-color color valve 3, a cleaning thinner valve 4, and a cleaning air valve 5 are attached to the manifold 1 to constitute a color change unit. 6 and 7 are regulators.
Further, a trigger valve 10, a dump valve 11, and a T/D valve 13 are attached to the manifold 12, and a manifold with a cleaning thinner valve 14 and a cleaning air valve 15 attached to the T/D valve 13 is connected with a hose 20, and relay Constitutes a cleaning valve unit. A trigger valve 16, a dump valve 17, and a T/D valve 22 are attached to the manifold 21.
A manifold 32 with a soft thinner valve 23 and a soft air valve 24 attached thereto is connected to the T/D valve 22 with a hose 26 to form a spray machine cleaning valve unit.

8 is color change unit manifold 1
9 is a paint hose connected to the trigger valve 10 of the relay cleaning valve unit, and 9 is a drain hose connected to the dump valve 11 of the relay cleaning valve unit and the drain ejector box 31, forming a first cleaning system. do.

18 is a drain hose connected to the drain ejector box 31 and the dump valve 17 of the paint sprayer cleaning valve unit, and 19 is connected to the manifold 12 of the intermediate cleaning valve unit and the trigger valve 16 of the paint sprayer cleaning valve unit. The paint hose forms a second cleaning system that extends from the manifold 12 via the trigger valve 16 to the drain ejector box 31.

A drain hose 25 is connected to a drain ejector box 31 and a suction nozzle 30 provided in the shroud 29, and the liquid is drained from the manifold 21 via the bell cup feed tube 27, the bell 28, and the suction nozzle 30. A third cleaning system up to the ejector box 31 is formed.

Figure 2 shows the state installed on an automatic coating machine.
The color change unit and drain ejector box 31 are attached to the machine body 33, the relay cleaning valve unit to the lifting frame 36, and the sprayer cleaning valve unit to the bell unit 39.

In FIG. 2, the same parts as in FIG. 1 are designated by the same reference numerals, and their explanation will be omitted.

The operation of this embodiment configured in this way will be described next.

In FIG. 1, first, when the bell 28 is painted in one color, the supply amount of paint is adjusted by the regulator 6 of the one-color color valve 3 of the color change unit, and the one-color color valve 3 and the trigger valve 10 are opened. , manifold 12, trigger valve 16, manifold 21, feed tube 27, and is supplied to bell cup 28 for painting.

In this way, when painting is started, as shown in FIG. 3, the dump valve 11 of the first cleaning system,
thinner valve 4, air valve 5 second cleaning system dump valve 17, T/D valve 13, thinner valve 13, air valve 14 and third cleaning system T/D valve 22, soft thinner valve 23,
Soft air valve 24 is closed. Also,
The two-color valve 2 is also closed, and the shroud suction 31' is stopped.

Next, after painting is completed, cleaning for color change is performed as follows.

This will be explained using FIG. 1 and FIG. 3 (time chart).

The symbols shown in the column of names in FIG. 3 are the same as those in FIG.

When the painting is finished, Isshiki Color Bulb 3,
Trigger valve 10 and trigger valve 16 are closed, and the supply of paint is stopped. Next, in response to a cleaning start command, cleaning of the first and second cleaning systems is started simultaneously.

First, in the first cleaning system, the dump valve 11 is opened, and the cleaning thinner valve 4 and cleaning air valve 5 are alternately opened and closed to alternately send thinner and air.
Clean the inside of the first cleaning system. The trigger valve 10 is
The paint supply is stopped and the valve is closed, communicating with the dump valve 11 side. The cleaning solution is
The liquid is discharged to the drain ejector box 31.

Further, as shown in FIG. 3, the second cleaning system opens the dump valve 17 and the T/D valve 13, and alternately opens the cleaning thinner valve 14 and cleaning air valve 15 to alternately send thinner and air to the second cleaning system. Clean the inside of the cleaning system. The trigger valve 16 is connected to the drain ejector box 3 when the paint supply is stopped and the valve is closed.
It is open on the first side. And the washed liquid is
The liquid is discharged to the drain ejector box 31.

Next, as shown in FIG. 3, the third cleaning system is started after a timer _T1 after the start of cleaning of the first and second cleaning systems.

In other words, the timer _T1 is the time it takes for the mini-bell's bell cup rotation speed to drop to a rotation speed that can be cleaned and for the shroud 29 to move forward and cover the bell cup 28 (which is the amount of time that will occur when cleaning a bell cup that is rotating at high speed). The paint that is being used will be scattered all over the place.

After the cleaning preparation is completed in this way, the T/D valve 22 is opened, the soft thinner valve 23 and the soft air valve 24 are opened alternately, and thinner and air are alternately sent to clean the third cleaning system. The cleaning liquid accumulated at the bottom of the shroud 29 is then transferred to the suction nozzle 3.
0, and is discharged to the drain ejector box 31.

After the cleaning of the first, second and third cleaning systems is completed in this way, the dump valve 11, cleaning thinner valve 4, cleaning air valve 5, dump valve 17,
The cleaning operation is stopped by closing the T/D valve 13, cleaning thinner valve 14, cleaning air valve 15, T/D valve 22, soft thinner valve 23, soft air valve 24, and shroud suction ejector 31'.

In this way, it is the relay valve unit that can simultaneously clean the first and second cleaning systems and wait for time for the bell cup rotation speed to drop to a level that allows cleaning. The cleaning system is divided into the first, second, and third cleaning systems, and the cleaning air valve 5, cleaning thinner valve 4, and cleaning air valve 15 are independently installed in the color change valve unit, relay valve unit, and paint machine cleaning valve unit, respectively. This is because a cleaning thinner valve 14, a soft air valve 24, and a sowing thinner valve 23 are provided.

In this way, the cleaning system was divided into three parts, and an air valve and a thinner valve were installed independently for each, and the sprayer cleaning valve unit was also installed near the sprayer, so it was divided into three parts as shown in Figure 3. The cleaning of the cleaning system is completed almost simultaneously and in a short time.

Then, a quick blowing operation is performed as a preparation for supplying the next color. As shown in FIG. 3, the trigger valve 10 of the first cleaning system, the dump valve 17 of the second cleaning system, and the two-color color valve 2 of the color change unit are opened in response to the quick blow 1 command. As a result, the paint sent from the manifold 1 passes through the trigger valve 10, the manifold 12, and the trigger valve 16 in the closed state, and reaches the dump valve 17 when the spray 1 ends (set by the timer). 2
goes into action.

That is, in the instant blow 2, the dump valve 17 is closed, the trigger valve 16 is opened, and the shroud suction ejector 3 is closed.
1' is turned ON, the paint that has been supplied to the dump valve 17 at the pump 1 is transferred to the manifold 21 and the Betsu field tube 2.
7 to the bell 28. The remaining paint is sucked by the suction nozzle 30 and discharged to the drain ejector box 31, so that no paint drips.

At this time, the shroud 29 moves forward and the bell 28
It is now covered.

In this way, spraying can be performed in two stages by dividing the cleaning system into three parts via the relay valve unit, and by connecting the trigger valve 10, dump valve 11, and T to the manifold 12 of the relay valve unit. A /D valve 13 is provided, and after the first and second cleaning systems have been cleaned, the trigger valve 10 is opened and the dump valve 11 is closed to form a paint supply path to the dump valve 17 of the paint sprayer cleaning valve unit. This is because it is possible to supply paint independently from the paint sprayer, and the third cleaning system is connected to the drainage ejector box via a bell cup with a hose to prevent paint from dripping.

In this way, the cleaning system is divided into three parts to prevent residual paint from scattering due to the rotation of the bell 28.
The cleaning of the second and third cleaning systems is completed almost simultaneously in a short period of time, and the spraying is divided into two stages. Since the paint is supplied to the bell 28 of the coating machine by blowing, it becomes possible to supply the paint to the bell 28 in a short time.

When the quick blow is completed, the two-color color valve 2, the trigger valve 10, and the trigger valve 16 are closed, and the shroud suction ejector 31' is turned off.

Then, in response to a coating start command, the shroud 29 retracts, and the two-color valve 2 and the trigger valve 10
and 16 are opened and painting begins.

[Effect of idea]

As detailed above, according to the present invention, the manifold of the color change unit is provided with a cleaning thinner valve and a cleaning air valve, and the manifold is provided with a trigger valve, a dump valve, and a T/D valve, and the cleaning thinner valve and the cleaning air valve are provided with the The first cleaning system connects the trigger valve of the relay cleaning valve unit connected to the T/D valve with a hose and reaches the drain ejector box via the dump valve, and the first cleaning system is installed close to the paint sprayer.
A dump valve, a trigger valve, and a T/D valve are provided on the manifold, and the trigger valve of the paint sprayer cleaning valve unit, which has a soft thinner valve and a soft air valve connected to the T/D valve, and the manifold of the relay valve unit are connected with a hose. , a second cleaning system leading to the drain ejector box via the dump valve and a trigger valve, and a third cleaning system leading from the manifold of the paint sprayer cleaning unit to the drain ejector box via the bell cup. Since it is divided into three parts, it is possible to clean the automatic coating machine in a short time, and since spraying can be done in two stages, it is possible to supply paint to the bell after cleaning in a short time. can.

As a result, the automatic coating machine has a wide operating range, and even if the hose is long, cleaning and color changes can be performed in a short time, and productivity can be greatly improved.

[Brief explanation of drawings]

Figures 1 to 3 are diagrams showing an embodiment of the present invention. Figure 1 is a flow diagram of the first cleaning system, second cleaning system, and third cleaning system, and Figure 2 is an automatic coating machine. FIG. 3 is a front view when the first, second, and third cleaning systems are applied, and is a time chart showing the operation of each cleaning system. FIG. 4 is a front view of a conventional automatic coating machine. 1...Manifold, 2...Two-color valve,
3...Isshiki color valve, 4...Cleaning thinner valve, 5...Cleaning air valve, 10...Trigger valve, 11...Dump valve, 12...Manifold, 13...T/D valve, 14...Cleaning thinner valve, 15...Cleaning air valve, 16...Trigger valve, 17...Dump valve, 21...Manifold, 22...T/D valve, 23...Soft thinner valve, 24...Soft thinner valve.

Claims (1)

[Scope of utility model registration request] A color change unit has a manifold equipped with a one-color valve, a two-color color valve, a cleaning thinner valve, and a cleaning air valve, and a trigger valve, a dump valve, and a T/D valve are installed in the manifold, and the cleaning thinner valve and cleaning air valve are connected to the T/D valve. A relay cleaning valve unit connected to the sprayer, a dump valve, a trigger valve, and a T/D valve are installed on the manifold, and a sprayer cleaning valve unit, which has a soft thinner valve and a soft air valve connected to the T/D valve, is installed near the sprayer. a first cleaning system that runs from the manifold of the color change unit to the drain ejector box via the trigger valve and dump valve of the relay cleaning valve unit; and a first cleaning system that connects the manifold of the relay cleaning valve unit to the paint sprayer cleaning system. a second cleaning system leading to the drain ejector box via the dump valve and trigger valve of the valve unit; and a third cleaning system leading from the manifold of the paint sprayer cleaning unit to the drain ejector box via the bell cup.
A color change cleaning device for automatic painting machines equipped with a cleaning system.