JPH10277506A - Washing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a washing liquid from dripping out of a washing liquid jetting nozzle after washing is finished and shorten the time for washing process by installing a negative pressure producing means, which can generate negative pressure in a liquid supplying pipe to inhibit dripping of the washing liquid out of the washing liquid spraying nozzle, in a washing apparatus. SOLUTION: When a work W is transported to a washing and air blowing chamber 10, a supply pump 18 is driven and at the same time a washing controlling valve 19 is opened and a washing liquid is jetted out of a washing liquid jetting nozzle 11. Simultaneously, a vacuum controlling valve 33 is opened and a vacuum tank 32 is evacuated. After a prescribed time, the supply pump 18 is stopped and the washing controlling valve 19 is closed. Further, at the same time, a liquid discharging valve 34 is opened and an air blowing valve 27 is opened to generate negative pressure in the liquid supplying pipe 16 and the washing liquid remaining in the nozzle 11 is sucked and recovered in a vacuum tank 32. While the washing liquid being prevented from dripping out of the nozzle 11, air is blown out of an air jetting nozzle 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning apparatus capable of removing a cleaning liquid adhering to a work by spraying the cleaning liquid onto the work and then cleaning the work by air blowing.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional structure of a cleaning apparatus. In the figure, 1 is an apparatus main body, 10P is a cleaning room, and 20P is an air blow room. In the cleaning chamber 10P, a cleaning liquid jet nozzle 11 that can jet a cleaning liquid toward the work W is provided. The cleaning liquid is supplied from the cleaning liquid supply means 15 to the cleaning liquid injection nozzle 11 through the liquid supply pipe 16.

[0003] An air injection nozzle 21 is provided in the air blow chamber 20 P, and compressed air is supplied to the nozzle 21 from a compressed air supply source 25 through an air supply pipe 26. Air is sprayed from the air injection nozzle 21 onto the cleaned work W to remove the cleaning liquid attached to the surface of the work W.

The air blow chamber 20P and the cleaning chamber 10P
Is partitioned by a partition wall 2 having an opening 3, and the opening 3 can be opened and closed by a door 4.

In FIG. 4, reference numeral 50 denotes a conveying means. The transfer means 50 includes a hydraulic cylinder 51 and a work receiving table 52 mounted on a tip end of a rod of the hydraulic cylinder 51, and transfers the work W placed on the work receiving table 52 from the outside to the air blow chamber 20P. It is formed so that it can be carried in and out, and can be carried between the air blow chamber 20P and the cleaning chamber 10P. Reference numeral 5 denotes a door for carrying the work W into and out of the air blow chamber 20P, which is formed to be openable and closable.

In order to clean the work W using the above-described cleaning apparatus, the doors (4, 5) are opened, and then the work W is carried into the cleaning room 10P using the transfer means 50. Next, the doors (4, 5) are closed, and the cleaning liquid is sprayed from the cleaning liquid injection nozzle 11 toward the work W for a predetermined time to clean the work W.

After the cleaning of the work W, the door 4 is opened and the work W is transported to the air blow chamber 20P. Then, in the air blow chamber 20P, the air is sprayed from the air injection nozzle 21 onto the work W for a predetermined time to remove the cleaning liquid attached to the work W, and then the work W is carried out.

[0008]

In the above-described cleaning apparatus, there is a strong demand for shortening the time of a cleaning step including cleaning and air blowing.

Here, the cleaning is performed in the cleaning chamber 10P and the air blowing is performed in the air blowing chamber 20P. However, if the cleaning and the air blowing are performed in the cleaning chamber 10P, both chambers are cleaned. There is no need to transport the work W between (10P, 20P), and the cleaning process time can be shortened.

Therefore, as shown in FIG. 5, a cleaning apparatus has been developed for cleaning the work W and air blowing in the cleaning / air blowing chamber 10 provided with the cleaning liquid injection nozzle 11 and the air injection nozzle 21. .

By the way, after the cleaning of the work W, a drop of the cleaning liquid may drop from the cleaning liquid injection nozzle 11 whose injection is stopped, and may remain on the surface of the work W. Such an inconvenience becomes more likely to occur as the time during which the work W remains in the cleaning chamber 10P after cleaning becomes longer.

Therefore, in the cleaning apparatus shown in FIG.
It is necessary to set the air blow time so that even if the cleaning liquid drips from the cleaning liquid injection nozzle 11 on the surface of the work W, the cleaning liquid droplets can be removed. Therefore, there is no point in performing the cleaning and the air blowing in the same place.

An object of the present invention is to provide a cleaning apparatus which can greatly reduce a cleaning process time by air blowing while preventing a cleaning liquid from dripping from a cleaning liquid injection nozzle after cleaning is completed in a cleaning / air blowing chamber. It is in.

[0014]

According to a first aspect of the present invention, there is provided a cleaning / air blow chamber provided with a cleaning liquid injection nozzle and an air injection nozzle, and a cleaning liquid capable of supplying a cleaning liquid to the cleaning liquid injection nozzle via a liquid supply pipe. A cleaning device provided with a supply unit, wherein a negative pressure generating unit capable of generating a negative pressure in the liquid supply pipe capable of preventing the cleaning liquid from dripping from the cleaning liquid injection nozzle is provided.

[0015] In this invention, a negative pressure is generated in the liquid supply pipe by the negative pressure generating means after the work is washed. Thus, the cleaning liquid in the cleaning liquid injection nozzle is urged toward the liquid supply pipe by the pressure difference, and is prevented from dripping by its own weight or the like. Therefore, in the cleaning / air blowing chamber, after the cleaning is completed, the cleaning liquid can be prevented from dripping from the cleaning liquid injection nozzle and air blow can be performed to greatly reduce the cleaning process time.

According to a second aspect of the present invention, the negative pressure generating means includes:
The cleaning device is configured so that a part of the compressed air supplied to the air injection nozzle is caused to flow at a high speed to generate a negative pressure in the liquid supply pipe by an ejector effect.

In this invention, a part of the compressed air supplied to the air injection nozzle is used to generate a negative pressure in the liquid supply pipe, so that the same operation and effect as those of the first invention can be obtained. Besides, it is possible to further reduce the cost by simplifying the configuration.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the present cleaning apparatus has a basic configuration similar to that of the conventional example (FIG. 5). However, a negative pressure generating means 30 is provided, and a negative pressure is provided in the liquid supply pipe 16. Is generated so as to prevent the cleaning liquid from dripping from the cleaning liquid injection nozzle 11 and perform the cleaning of the work W and the air blowing in the cleaning / air blowing chamber 10.

The same components as those in the conventional example (FIG. 5) are denoted by the same reference numerals, and description thereof will be simplified or omitted.

A cleaning liquid jet nozzle 11 and an air jet nozzle 21 are provided in the cleaning / air blow chamber 10. The cleaning liquid supply nozzle 15 is connected to the cleaning liquid injection nozzle 11 via a liquid supply pipe 16. A compressed air supply source 25 is connected to the air injection nozzle 21 via an air supply pipe 26.

The cleaning liquid supply means 15 includes a cleaning liquid storage tank 17 and a supply pump 18, and is formed so that the cleaning liquid in the tank 17 can be supplied to the cleaning liquid injection nozzle 11 through a liquid supply pipe 16. A cleaning control valve 19 capable of adjusting the supply flow rate of the cleaning liquid is interposed in the liquid supply pipe 16. On the other hand, the air supply pipe 26 has an air blow valve 27
Is interposed.

At the outlet of the cleaning / air blow chamber 10, there is provided an auxiliary air injection nozzle 22 for finally blowing the work W at the time of unloading. The nozzle 22 is connected to an air supply pipe 26 via a pipe 26A, and an air blow valve 28 for carrying out is interposed in the pipe 26A.

The negative pressure generating means 30 is formed so as to generate a negative pressure in the liquid supply pipe 16 to prevent dripping of the cleaning liquid from the cleaning liquid injection nozzle 11. In this embodiment, the negative pressure generating means 30 includes a vacuum ejector 31, a vacuum tank 32, a vacuum control valve 33, a drain valve 34, and a discharge valve 35, and a part of the compressed air supplied to the air injection nozzle 21. The liquid supply pipe 16 is formed so as to be able to generate a negative pressure by utilizing the same.

In this embodiment, the negative pressure generating means 30
The cleaning liquid remaining in the cleaning liquid injection nozzle 11 is sucked and collected in the vacuum tank 32 so that the dripping of the cleaning liquid can be more reliably prevented.

The vacuum ejector 31 is connected to the compressed air supply source 25 via a connection pipe 36, and the pipe 36 is provided with a vacuum control valve 33. The vacuum tank 32 is connected to the vacuum ejector 31 via an air suction pipe 37, and is connected to the cleaning liquid jet nozzle 11 via a liquid suction pipe 38.
The liquid suction pipe 38 is provided with a liquid drain valve 34. The vacuum tank 32 is connected to a vacuum release valve 33A.

When the vacuum control valve 33 is opened and compressed air is supplied from the compressed air supply source 25 to the vacuum ejector 31, the compressed air flows (spouts) at a high speed in the vacuum ejector 31, and the ejector effect of the compressed air is generated. The air in the vacuum tank 32 is sucked through the air suction pipe 37 by the (feed-in effect). Then, a negative pressure is generated in the liquid supply pipe 16 connected to the vacuum tank 32 via the liquid suction pipe 38.

As a result, the cleaning liquid remaining in the cleaning liquid injection nozzle 11 is sucked under a negative pressure, so that the vacuum tank 3
Collected in 2. The cleaning liquid contained in the vacuum tank 32 is discharged to the discharge pipe 3 by opening the discharge valve 35.
9 and is returned to the cleaning liquid storage tank 17.

As shown in FIG. 2, the supply pump 18 and the vacuum control valve 33 are controlled to be opened and closed by control means 40 for controlling the operation of the entire cleaning apparatus. The control means 40 includes a CPU 41, a ROM 42, a RAM 43, a keyboard 44, a display 45, an input / output port 46, and the like. The input / output port 46 includes the supply pump 18 and the various valves (19, 27, 28, 33, 33A, 3A).
4, 35) are connected.

Next, the operation of this embodiment will be described with reference to the timing chart shown in FIG. When the detection means (not shown) detects that the work W has been carried into the cleaning / air blow chamber 10, the CPU 41 drives the supply pump 18 and opens the cleaning control valve 19. As a result, the cleaning liquid is injected from the cleaning liquid injection nozzle 11 toward the work W, and the work W is cleaned. The vacuum control valve 33 is opened at the same time when the supply pump 18 starts to be driven, and the inside of the vacuum tank 32 is evacuated.

A predetermined time T from the start of driving of the supply pump 18
1 (for example, T1 = 16 seconds), the CPU 41 stops driving the supply pump 18 and at the same time
To close. Thus, the injection of the cleaning liquid from the cleaning liquid injection nozzle 11 is stopped. That is, the cleaning of the work W is completed.

After a lapse of a predetermined time T1 (for example, T1 = 16 seconds), the CPU 41 opens the liquid drain valve 34 and opens the air blow valve 27. As a result, a negative pressure is generated in the liquid supply pipe 16 and the cleaning liquid injection nozzle 1
The cleaning liquid remaining in the vacuum tank 3
Collected in 2. Therefore, it is possible to perform the air blow while preventing the cleaning liquid from dripping from the cleaning liquid injection nozzle 11 after the cleaning is completed.

Since the mist floating in the cleaning / air blow chamber 10 is also sucked through the cleaning liquid jet nozzle 11 at the time of suctioning the cleaning liquid, air blowing can be satisfactorily performed in a cleaner environment.

A predetermined time T after opening the liquid drain valve 34, etc.
2 (for example, T2 = 19 seconds), the CPU 41 closes the drain valve 34, the air blow valve 27, and the vacuum control valve 33, and also releases the vacuum release valve 33A and the discharge valve 3
Release 5. As a result, the air blow is terminated, the vacuum in the vacuum tank 32 is released, and the cleaning liquid collected in the tank 32 is returned to the cleaning liquid storage tank 17.

After the end of the air blow, the work W is removed from the cleaning / air blow chamber 10 for a predetermined time T3 (for example, T3 = 1).
6 seconds). At this time, the unloading air blow valve 28 is opened, and the final air blow is performed.

In this embodiment, the negative pressure generating means 30 is provided to generate a negative pressure in the liquid supply pipe 16 to prevent the cleaning liquid from dripping from the cleaning liquid injection nozzle 11,
Since the cleaning and air blowing of the work W can be performed in the cleaning / air blowing chamber 10, the cleaning process time is performed by air blowing while preventing the cleaning liquid from dripping from the cleaning liquid injection nozzle 11 after the cleaning is completed. Can be greatly reduced.

Further, since a negative pressure is generated in the liquid supply pipe 16 by utilizing a part of the compressed air supplied to the air injection nozzle 21, the configuration can be further simplified and the cost can be reduced.

Further, since the negative pressure generating means 30 is formed to include the vacuum tank 32 connected to the vacuum ejector 31, the vacuum ejector 31 is driven during the cleaning time to evacuate the vacuum tank 32. be able to. Therefore, immediately after washing is completed, the liquid supply piping 1
By generating a negative pressure in the cleaning liquid 6, dripping of the cleaning liquid from the cleaning liquid injection nozzle 11 can be prevented, and air can be blown more quickly and smoothly.

Further, at the time of sucking the cleaning liquid, mist floating in the cleaning / air blow chamber 10 can also be sucked through the cleaning liquid jet nozzle 11, so that air blowing can be performed in a more favorable environment.

In the above embodiment, the negative pressure generating means 3
Although 0 is formed from the vacuum ejector 31 and the like, it may be formed so that a negative pressure can be generated in the liquid supply pipe 16 using a vacuum pump. Further, the negative pressure generating means 30 is formed so that the cleaning liquid supplied from the cleaning liquid supply means 15 is caused to flow (spout) at a high speed by using a water flow pump so that a negative pressure can be generated in the liquid supply pipe 16 by its ejector effect. You may.

[0040]

According to the first aspect of the present invention, a negative pressure generating means is provided to generate a negative pressure in the liquid supply pipe to prevent dripping of the cleaning liquid from the cleaning liquid injection nozzle, thereby preventing the cleaning liquid from dripping from the cleaning / air blow chamber. Cleaning and air blow can be performed, so that the cleaning liquid is dripped from the cleaning liquid injection nozzle after cleaning is completed in the cleaning / air blow chamber and air blowing is performed, greatly reducing the cleaning process time. Can be.

According to the second aspect of the present invention, a negative pressure is generated in the liquid supply pipe by using a part of the compressed air supplied to the air injection nozzle. The same effects can be obtained, and the configuration can be further simplified to reduce the cost.

[Brief description of the drawings]

FIG. 1 is a diagram for describing an embodiment of the present invention.

FIG. 2 is a block diagram for explaining the overall configuration.

FIG. 3 is a timing chart for explaining the operation.

FIG. 4 is a view for explaining a conventional configuration (1) of a cleaning apparatus.

FIG. 5 is a view for explaining a conventional configuration (2) of the cleaning apparatus.

[Explanation of symbols]

 Reference Signs List 10 cleaning / air blow chamber 11 cleaning liquid injection nozzle 15 cleaning liquid supply means 16 liquid supply pipe 17 cleaning liquid storage tank 18 supply pump 19 cleaning control valve 21 air injection nozzle 25 compressed air supply source 26 air supply pipe 27 air blow valve 30 negative pressure generation Means 31 Vacuum ejector 33 Vacuum control valve 34 Drain valve 35 Discharge valve

Claims (2)

[Claims] 1. A cleaning apparatus comprising: a cleaning / air blow chamber provided with a cleaning liquid injection nozzle and an air injection nozzle; and cleaning liquid supply means capable of supplying a cleaning liquid to the cleaning liquid injection nozzle via a liquid supply pipe. A cleaning apparatus, comprising: a negative pressure generating means capable of generating a negative pressure in the liquid supply pipe capable of preventing a cleaning liquid from dripping from a cleaning liquid injection nozzle. 2. The negative pressure generating means is configured to generate a negative pressure in the liquid supply pipe by ejecting a part of the compressed air supplied to the air injection nozzle at a high speed. The cleaning device according to claim 1, wherein: