JP2854455B2 - Automatic paint residue collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint slag automatic recovery apparatus.

[0002]

2. Description of the Related Art Generally, in a coating factory, paint sprayed over various objects to be coated such as vehicles is collected and stored together with water as paint scum by a water shower in a water tank installed outdoors.

[0003] The paint scum collected in the water tank floats on the surface of the water lighter than water. Therefore, the paint scum that floated on the surface of the water is periodically removed by an operator using a ladle-shaped jig with a wire mesh at the tip. It was scooped and collected.

[0004]

However, if the worker scrapes and collects the paint residue floating on the water surface periodically using a jig as described above, the burden on the worker is extremely large. In addition, there is a disadvantage that the efficiency is low.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an automatic paint scum collection device capable of mechanically efficiently collecting paint scum and reducing the burden on an operator.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a water tank for collecting and storing paint oversprayed as paint scum together with water by a water shower, a liquid level sensor for detecting a liquid level in the water tank, and a liquid level sensor. A container for collecting paint scum and water which is driven up and down so that the upper edge is positioned slightly lower than the liquid level based on a detection signal of the sensor and which floats in the water tank, and sucks paint scum and water in the container by a vacuum pump. A separating device comprising a paint residue tank for separating and separating, and a water collecting vacuum tank connected to the paint residue tank via a filter, and a water level sensor for detecting a water level of the water collecting vacuum tank of the separating device. A recovery water return pipe for returning the water in the water recovery vacuum tank to the water tank having an on-off valve that opens and closes based on a detection signal of the water level sensor, and a paint residue in a paint residue residue tank of the separation device. Unloading device for sending and collecting The is characterized in that it comprises.

[0007]

Therefore, the liquid level of the water tank is detected by the liquid level sensor, and the upper edge of the container is always kept at a position slightly lower than the liquid level of the water tank based on the detection signal of the liquid level sensor. Paint scum and a small amount of water flow in and are collected.The paint scum and water collected in the container are sucked into the paint scum residue tank of the separator by the operation of the vacuum pump, and only water passes through the filter. When the water level is detected by the water level sensor, the paint scum remains in the paint scum residue tank and accumulates, and the water sucked into the water collection vacuum tank reaches a required level. The open / close valve is opened based on the detection signal of the water level sensor, the water in the water recovery vacuum tank is returned to the water tank via the recovered water return pipe, and the paint residue in the paint residue tank is sent out by the carry-out device. Collected.

[0008]

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

FIGS. 1 to 3 show an embodiment of the present invention. In a water tank 3 for collecting and storing an oversprayed paint together with water 2 as paint scum 1 by a water shower, paint scum floating on the water tub 3 is shown. A container 4 for collecting the water 1 and water 2 is provided so as to be able to move up and down by the operation of a self-locking cylinder 5.

As shown in FIG. 2, the liquid level sensor 7 comprises three electrodes 9, 10, 11 having different lengths from a sensor body 8.
, The middle electrode 10 is made substantially coincident with the height of the upper edge of the container 4, and the lower limit electrode 9 is set at a position lower than the middle electrode 10 by a required amount, and the upper limit is set at a position lower than the required amount by the required amount. By arranging the three electrodes 11, respectively, it is possible to reduce the state in which all three electrodes 9, 10, 11 are positioned above the liquid level or only the lowermost electrode 9 is positioned below the liquid level. It recognizes that the paint residue 1 has not been collected in the container 4 and outputs a command to extend the cylinder 5 to lower the upper edge of the container 4 so that the lowermost electrode 9 and the intermediate electrode 10 are positioned below the liquid level. The state where both electrodes 9 and 10 are conducted is recognized as a state where the liquid level is at an appropriate position and the paint residue 1 and water 2 are collected in the container 4. It outputs a command to hold the upper edge in that position, and all three electrodes 9, 10, 11 Located under the surface the electrodes 10 and 11
Is recognized as a state where the liquid level is too high and only water 2 is collected in the container 4 and only a small amount of paint residue 1 is collected, and the cylinder 5 is contracted to raise the upper edge of the container 4. Is output.

In FIG. 2, reference numeral 12 denotes a rod 6 of the cylinder 5.
Is a guide roller for guiding

A paint residue tank 14 to which a water recovery vacuum tank 15 capable of maintaining a negative pressure by a vacuum pump 13 is connected via a filter 16 is connected to the container 4 via a suction pipe 17. Vacuum pump 1 pumps paint residue 1 and water 2 in container 4
3 constitutes a separating device 18 for suction and separation.

As shown in FIG. 3, the paint residue tank 14 has a shape in which the width is gradually reduced from the upper part to the lower part, and a screw conveyor 20 driven by a motor 19 is attached to the lower end thereof. An outlet 22 of the conveyor 20 is provided with an opening / closing door 23 which is slid by the operation of the cylinder 21, and
A trolley 24 for collecting the paint residue 1 is provided at a lower portion of the separation unit 18 by the screw conveyor 20 and the trolley 24.
And a carry-out device 25 for sending and collecting the paint scum 1 in the paint scum residue tank 14.

The water recovery vacuum tank 15 is provided with a water level sensor 26 for detecting a water level and a vacuum gauge 27 for detecting an internal pressure, and for returning the recovered water 2 to the water tank 3 again. In the middle of the recovered water return pipe 28, an on-off valve 29 is provided in the middle of the recovered water return pipe 28, which opens when the water level reaches a certain level based on the detection signal of the water level sensor 26 and closes after the drainage is completed. .

Next, the operation of the above embodiment will be described.

If all three electrodes of the liquid level sensor 7 are located above the liquid level of the water tank 3 or if only the lowermost electrode is located below the liquid level, the liquid level is too low and the It is recognized that the paint residue 1 has not been collected, the cylinder 5 is extended by the signal from the liquid level sensor 7, the upper edge of the container 4 is lowered, and the lower and middle electrodes are positioned below the liquid level. When the electrodes are conducted, it is recognized that the liquid level is at an appropriate position and the paint residue 1 and water 2 are collected in the container 4, the cylinder 5 stops, and the upper edge of the container 4 is held at that position. .

On the other hand, if all three electrodes are located below the liquid level due to fluctuations in the liquid level and both electrodes conduct, the liquid level is too high and almost only water 2 is collected in the container 4 and the paint residue 1 Is recognized as a state in which only a small amount is sampled, the cylinder 5 is contracted by the signal from the liquid level sensor 7 and the upper edge of the container 4 is raised, and only the lowermost electrode and the intermediate electrode are positioned below the liquid level and both electrodes Is conducted, it is recognized that the liquid surface is at an appropriate position and the paint residue 1 and water 2 are collected in the container 4, the cylinder 5 is stopped, and the upper edge of the container 4 is held at that position.

As a result, the upper edge of the container 4 is always held at a position lower than the liquid level of the water tank 3 by a required amount, so that the paint residue 1 and a small amount of water 2 flow into the container 4. Collected.

The paint residue 1 and water 2 collected in the container 4
By the operation of the vacuum pump 13, it is sucked into the paint residue tank 14 of the separation device 18 via the suction pipe 17, only the water 2 passes through the filter 16 and is sucked into the water recovery vacuum tank 15, and the paint residue 1 is removed. It remains and accumulates in the paint residue tank 14.

When the water level sensor 26 detects that the water 2 sucked into the water recovery vacuum tank 15 has reached a required level, the on-off valve 29 is opened based on the detection signal of the water level sensor 26, and the water recovery vacuum is opened. The water 2 in the tank 15 is returned to the water tank 3 through the recovered water return pipe 28, and the carrying-out device 25
The screw conveyor 20 is rotated by the motor 19, the paint residue 1 in the paint residue tank 14 is fed out, the opening and closing door 23 is opened by the operation of the cylinder 21, and the discharging door 22 is moved onto the carriage 24. Is discharged.

In this manner, it is not necessary for an operator to periodically scoop and collect the paint scum 1 floating on the water surface, and the paint scum 1 can be mechanically and efficiently collected, and the burden on the operator can be reduced. Can be greatly reduced.

The automatic paint slag collecting apparatus of the present invention is not limited to the above-described embodiment, but may be variously modified without departing from the gist of the present invention.

[0023]

As described above, according to the paint slag automatic recovery apparatus of the present invention, the paint scum can be efficiently recovered mechanically and the burden on the operator can be reduced. .

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram of an embodiment of the present invention.

FIG. 2 is a detailed view of a portion II in FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paint residue 2 Water 3 Water tank 4 Container 7 Liquid level sensor 13 Vacuum pump 14 Paint residue tank 15 Water recovery vacuum tank 16 Filter 18 Separator 25 Unloading device 26 Water level sensor 28 Recovered water return pipe 29 Open / close valve

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-233109 (JP, A) JP-A-2-68168 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C02F 1/40 B05B 15/04 104 B05C 11/10

Claims (1)

(57) [Claims] 1. A water tank for collecting and storing paint sprayed as paint scum together with water by a water shower, a liquid level sensor for detecting a liquid level of the water tank, and an upper edge based on a detection signal of the liquid level sensor. A container for collecting paint scum and water which is driven up and down so that the portion is located slightly lower than the liquid level and floats in the water tank, and a paint scum for sucking and separating the paint scum and water in the container by a vacuum pump A separating device comprising a water collecting vacuum tank connected to the residual tank and the paint residue tank via a filter, a water level sensor for detecting a water level of the water collecting vacuum tank of the separating device, and a detection signal of the water level sensor. A recovery water return pipe having an on-off valve that opens and closes based on the water in the water recovery vacuum tank to return the water in the water tank, and a carry-out device for sending and collecting paint residue in the paint residue residual tank of the separation device. Characterized by having Automatic paint residue collection device.