JPS6341636B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology is an ultrasonic cleaning technology that prevents dirt in the cleaning solution from re-adhering to the object to be cleaned and performs ultra-precise cleaning by blocking outside air as much as possible. Belongs to a field.

<Summary of the gist> The invention of this application is an ultrasonic cleaning method in which a cleaning basket containing items to be cleaned is immersed in a cleaning liquid in a cleaning tank, and precision cleaning is performed using an ultrasonic vibrator, and an ultrasonic cleaning method that can be directly used in the ultrasonic cleaning method. This invention relates to a sonic cleaning device, and in particular, the cleaning tank middle body of the cleaning basket is connected between a cleaning tank lower body provided on a lower frame and a cleaning tank upper body provided on an upper frame opposite to the lower frame. The lower frame and the upper frame are closely integrated via a lifting device provided on at least one side to form a closed cleaning tank, and then a cleaning liquid is supplied into the closed cleaning tank to increase the ultrasonic vibration of the ultrasonic transducer. Precise cleaning is performed using sonic vibration energy, and at the same time, the cleaning liquid is purified and circulated to perform precision cleaning with the constantly purified cleaning liquid. After cleaning is completed, the cleaning liquid is discharged from the middle body of the cleaning tank to the lower body of the cleaning tank. An ultrasonic cleaning method in which the upper body is separated from the upper body through the lifting device, and the body in the cleaning tank is transferred between the lower body and the upper body in the next cleaning tank, and the above-mentioned cleaning process is sequentially repeated. This invention relates to an ultrasonic cleaning device that can be used directly.

<Prior Art> As is well known, precision cleaning using ultrasonic cleaning is generally performed to clean precision glass products such as lenses and other precision components such as electronic components after molding.

<Problems to be Solved by the Invention> For example, in conventional ultrasonic cleaning as disclosed in the invention disclosed in JP-A-47-21967, for each fixed cleaning tank, for example, The cleaning basket containing the lenses to be cleaned is sequentially transported into each cleaning tank, and the cleaning basket is moved up and down relative to each cleaning tank to be carried in and out, which reduces the capacity of the cleaning tank itself. Therefore, as mentioned above, the amount of cleaning liquid supplied for each cleaning increases.As a result, it takes a long time to supply and drain the cleaning liquid, so the amount of cleaning liquid supplied for each cleaning increases. The problem was that all the dirty cleaning liquid in the cleaning tank could not be discharged, and the dirt was likely to re-adhere to the items to be cleaned, resulting in significantly poor cleaning efficiency.

Furthermore, when a cleaning basket containing cleaned lenses is transported to the next cleaning tank, the dirty cleaning solution remaining on the lenses and the cleaning basket drips onto the new cleaning solution in the next cleaning tank, making the new cleaning solution dirty. Furthermore, since the cleaning basket is raised from the inside of the cleaning tank and taken outside to be transported between cleaning tanks, dirt and dust in the outside air may adhere to the cleaned lenses. The disadvantage is that it is easy to clean, and the ultra-precision cleaning effect is impaired.

Furthermore, the cleaning liquid in the cleaning tank does not flow in one direction,
Because it is easy to circulate in a turbulent or swirling flow, the dirt re-attaches to the washed items that have been stained with the cleaning liquid, making it difficult to perform stable and precise cleaning.

<Objective of the Invention> The object of the invention of this application is to solve the problems of ultrasonic cleaning based on the above-mentioned prior art as a technical problem, to supply and discharge the cleaning liquid to and from the cleaning tank in a short time to improve the cleaning efficiency, It not only improves the drainage of the washed items, but also blocks the adhesion of dirt, dust, etc. in the outside air, and prevents dirt from re-adhering to the washed items, which are sequentially transported to the cleaning process in the tank. It is an object of the present invention to provide an ultrasonic cleaning method for precision cleaning that is excellent in the field of cleaning technology in various industries, and an ultrasonic cleaning device that can be used directly in the method.

<Means/effects for solving the problems> In order to solve the above-mentioned problems, the structure of the invention of this application, which is based on the above-mentioned claims, is to support the washing basket containing the washing items. between a cleaning tank lower body provided on a lower frame and a cleaning tank upper body provided on an upper frame opposite to the lower frame, a lifting device provided on at least one of the lower frame and the upper frame; to form a closed cleaning tank, and then supply a cleaning liquid into the closed cleaning tank to immerse the cleaning basket in the cleaning liquid,
Precise cleaning is performed using the ultrasonic vibration energy of an ultrasonic vibrator, and at the same time, the cleaning liquid is purified and circulated to perform precision cleaning with the purified cleaning liquid at all times to prevent detached dirt from re-adhering to the object to be cleaned. After cleaning is completed, the cleaning liquid is discharged and compressed air is forced into the cleaning tank to drain the liquid.Then, the lower body and upper body of the cleaning tank are separated from the cleaning basket support via a lifting device, and the cleaning basket is removed. A technique in which the washing basket is attached to the support, the outside air is blocked as much as possible, the washing basket support is horizontally conveyed between the lower body and the upper body of the next cleaning tank, and the above-mentioned cleaning process is sequentially repeated. The measures taken were as follows.

<Embodiments - Configuration> Next, embodiments of the invention of this application will be described below with reference to the drawings.

In the embodiment shown in FIGS. 1 to 5, reference numeral 1 denotes an ultrasonic cleaning tank which constitutes one of the gist of the invention of this application, and cleaning basket supports are mounted on both upper sides of a lower frame 2 on a base (not shown). A pair of running rails 5, 5 are laid for running the hollow cylindrical inner tank 3 via rollers 4, 4 on both sides thereof, and an upper frame is provided above the lower frame 2, facing the lower frame 2. 6 is provided.

A predetermined number of cylindrical lower tanks 7 as cleaning tank lower bodies are provided in the lower frame 2 at predetermined intervals via respective hydraulic cylinders 8 as elevating devices fixed to the bottom surface of the lower frame 2. and the upper frame 6 facing each of the lower tanks 7, 7...
Inside, an upper tank 9 as a cleaning tank upper body is provided so as to be movable up and down via respective hydraulic cylinders 10 as elevating devices fixed to the lower surface of the upper frame 6.

The lower surface of the lower flange 11 of the upper tank 9 and the upper surface of the upper flange 12 of the lower tank 7 are each provided with O.
Rings 13, 13 are buried, and the upper and lower flanges 14, 15 of the middle tank 3 are brought into close contact between the lower flange 11 of the upper tank 9 and the upper flange 12 of the lower tank 7 via each O-ring 13. As shown in FIG. 4, a sealed cleaning tank 16 is formed in this order.

Further, a discharge port 17 provided on the upper surface of the upper tank 9
Upper switching valve 18, pump 19, filter 2
0, is connected to a supply port 22 provided on the lower surface of the lower tank 7 via a lower switching valve 21 to enable free circulation, and furthermore, the upper and lower switching valves 1
8 and 21 are both connected to a tank 24 that stores a cleaning liquid 23, as shown in FIG.

Further, a well-known ultrasonic transducer 25 is fixed to the outer bottom surface of the lower tank 7, and a perforated plate 26 is provided on the inner bottom surface thereof, in which a plurality of holes are bored at predetermined intervals from the bottom surface.
is stretched so as to face the ultrasonic transducer 25 on the outer bottom surface, and a compressed air source 27 is provided on the top surface of the upper tank 9.
a valve 28 connected to the air vent valve 29;
are connected to each other.

A flange 32 for placing and supporting a cleaning basket 31 containing a lens 30 as a cleaning object is protrudingly attached to the inner side of the inner tank 3, and also in front of the lower flange 15 at the lower end of the inner tank 3. Rollers 4, 4 are provided on both sides of the rear side, and hooks 34, 34 of a chain 33 as a conveying device are connected and tensioned to a drive device (not shown) on the front roller 4 on one side.
...... is hung in the middle tank 3 as shown in Figure 3.
A bar 35 for conveying and moving the is extended to the side.

In addition, between each of the lower tanks 7, 7... of the lower frame 2, and each of the upper tanks 9, 9 of the upper frame 6...
There is a net 3 between each of the
6 are interposed respectively, and a U-shaped arm 37 is connected from each hydraulic cylinder 8 provided in the lower frame 2.
are connected to the upper flange 12 of the lower tank 7, respectively.

<Embodiment - Effect> In the above configuration, a predetermined number of lenses 3
The cleaning basket 31 containing 0, 30... is placed in the middle tank 3.
The inner tank 3 is placed on the inner flanges 32, 32, and the inner tank 3 is sequentially set on a pair of running rails 5, 5 on the supply port side of the ultrasonic cleaning device 1 by a predetermined means.

Then, the middle tank 3 is moved via the conveyance chain 33 to the lower tank 7 and the upper tank 9, which are initially located opposite to each other on the supply port sides of the lower frame 2 and upper frame 6, and Hydraulic cylinders 8 and 10 provided on the lower frame 2 and upper frame 6 are operated to move the lower tank 7 and upper tank 9 up and down, and the middle tank 3 is moved up and down between the lower tank 7 and the upper tank 9. They come into close contact between them, forming a closed cleaning tank 16 at one point.

Next, the pump 19 is supplied from the supply port 22 of the lower tank 7 to supply the cleaning liquid 23 to the combined sealed cleaning tank 16 to fill it, and the ultrasonic vibrator 25 is activated.
The bottom surface of the lower tank 7 becomes a radiating surface and generates ultrasonic waves,
The cleaning liquid 23 is passed through the perforated plate 2 above the bottom of the lower tank 7.
6, the wave becomes a layered uniform wave, and spreads toward the upper part of the closed cleaning tank 16.

Therefore, the dirt adhering to each lens 30 is completely peeled off by being uniformly subjected to the ultrasonic cleaning action, and without re-adhering to each lens 30, it floats upward with the rectification of the rising cleaning liquid 32, and the upper tank 9 is discharged together with the cleaning liquid 23 from the outlet 17 of the filter 2.
The cleaning liquid 23 that has been trapped in the water and cleaned of dirt is circulated through the supply port 22 to the closed cleaning tank 16 .

The sealed cleaning tank 16 is constructed by connecting the upper and lower flanges 14 and 15 of the middle tank 3 to the O-ring 13 embedded in the lower flange 11 of the upper tank 9, and the upper flange 12 of the upper tank 7.
The cleaning liquid 23 will not leak out of the tank during cleaning because the cleaning liquid 23 is in close contact with the tank via an O-ring 13 buried therein.

After cleaning in this way, the closed cleaning tank 16
The cleaning liquid 23 inside is supplied to the switching valve 21 from the supply port 22.
The air is discharged into the tank 24 through the compressed air source 27 through the valve 28 and then into the closed cleaning tank 16.
Blowing compressed air inside the tank and washing basket 3
1. Efficiently drain the liquid from each lens 30.

As a result, dirty cleaning liquid is completely prevented from being brought into the next tank.

Then, the middle tank 3 is separated from the upper tank 9 and the lower tank 7 via the hydraulic cylinders 8 and 10 of the lower frame 2 and the upper frame 6, and the closed washing tank 16 formed for cleaning items is disassembled.

In this way, the lens 30 that has finished the primary cleaning is transferred to the pair of running rails 5, 5 via the conveying chain 33 between the lower tank 7 and the upper tank 9 that form the next tank, so that the lens 30 is subjected to the secondary cleaning together with the middle tank 3. The ultrasonic cleaning process is repeated by repeating the ultrasonic precision cleaning similar to the above-mentioned cleaning process, and by repeating this process a predetermined number of times, the inner tank 3 is placed on the discharge port side of the ultrasonic cleaning device 1. Once transported one by one, they are taken out by a predetermined means to complete the cleaning.

In addition, between each lower tank 7, 7, and each upper tank 9,
9...A net 36 for preventing dust from entering in the outside air is installed between the
are interposed as mentioned above,
Dust from the outside air does not adhere to each cleaned lens 30 while the inner tank 3 is being transported.

<Other Embodiments> FIG. 6 shows another embodiment, in which a washing basket support having a communication hole 38 in the center is used as a washing basket support instead of the hollow cylindrical inner tank 3 of the above embodiment. The upper and lower surfaces of the plate 3' are pressed into close contact with the O-ring 13 embedded in the lower flange 11 of the upper tank 9 and the O-ring 13 embedded in the upper flange 12 of the lower tank 7, forming a sealed cleaning tank 16'. This embodiment has substantially the same effect as the above-mentioned embodiment.

Further, the embodiments shown in FIGS. 7 and 8 show another embodiment, in which a synthetic fiber porous sheet 31' stretched inside a ring pipe-shaped inner tank 3'' serving as a cleaning basket support is directly coated. A large number of microlenses 30', 30'...
. . . is mounted and stored, eliminating the need for a washing basket. A lower tank 7' (not shown) in the shape of an inverted truncated cone is directly connected to a hydraulic cylinder 8 provided at a predetermined position on the lower frame (not shown). It has a support conveyance arm 33' as a conveyance device connected to a drive device, and each end engagement portion of the support conveyance arm 33' has a
As shown in Fig. 8, locking bars 35', 35' extending sideways from both sides of the middle tank 3'' are engaged and the middle tank 3'' is conveyed to the lower flange 12 of the lower tank 7'. and set it.

Thereafter, the lower tank 7' is raised via a hydraulic cylinder 8, and the cylindrical upper tank 9', which has an ultrasonic transducer 25' inside, is raised via a hydraulic cylinder 10 fixed to an upper frame (not shown). upper and lower flanges 12, 11 of each tank 7', 9'
are tightly pressed against the upper and lower surfaces of the circumferential side of the inner tank 3'' to form a closed cleaning tank 16''.

Then, the tank 24 is opened from the supply port 22 of the lower tank 7'.
The cleaning liquid 23 in the tank is supplied to the outlet 17 of the upper tank 9'.
When the cleaning liquid 23 rises to the level, the control device 40 is actuated via the float switch 39, and the lower tank 9'
The ultrasonic vibrator 25' installed in the tank is activated to generate ultrasonic energy from the radiation surface of the bottom of the ultrasonic vibrator 25', and the ultrasonic energy is transmitted into the tank through the perforated plate 26 in the upper part of the lower tank 7'. The cleaning liquid 23 is uniformly rectified, the perforated plate 26 disposed at the lower part of the upper tank 9' prevents the lens 30' from floating, and the lens 30' is cleaned, and the switching valves 18 and 21 are operated. Then, the supply of the cleaning liquid 23 in the tank 24 is stopped, and the dirty cleaning liquid 23 in the tank is captured and purified through the filter 20 and circulated, thereby performing a predetermined precision cleaning.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments; for example, the ultrasonic transducer may be attached to either the inside or outside of the upper tank or the lower tank, or Instead of using a net to prevent dust from entering, various methods can be adopted, such as blowing clean air between the tanks to create an air curtain.

<Effects of the Invention> As described above, according to the invention of this application, basically in the ultrasonic cleaning method, the support of the cleaning basket containing the cleaning items is tightly sealed between the upper body of the cleaning tank and the lower body of the cleaning tank, and then , supplying a cleaning liquid into the closed cleaning tank;
The object to be cleaned is cleaned using the ultrasonic vibration energy of the ultrasonic vibrator, and the cleaning liquid is purified and circulated in the tank for precision cleaning. By cutting off outside air and removing a very small amount of The cleaning liquid reliably removes dirt adhering to the object to be cleaned, prevents the dirt from re-adhering to the object, and performs efficient, uniform and precise cleaning. Ultrasonic cleaning effectively utilizes ultrasonic vibration energy. Excellent effects can be achieved.

After the specified cleaning has been completed, the items to be washed are transported between the upper and lower bodies of the next tank without being taken out from the cleaning basket support in the cleaning tank inner body, while remaining set in the cleaning tank inner body. Furthermore, by repeating the cleaning, there is an advantage that dust in the outside air does not adhere to the cleaned object, further increasing the cleaning accuracy and significantly improving the cleaning effect.

In addition, a plurality of lower bodies of the cleaning tank are installed on the lower frame at predetermined intervals, and upper bodies of the cleaning tank are installed on the upper frame facing the lower frame so as to face the lower bodies, and each of the lower bodies and the upper body By making the cleaning tank middle body connected to the conveying device between them movable, the cleaning tank middle body can be smoothly transported between the lower body and the upper body, and the cleaning tank middle body connected to the conveying device is made movable. A closed cleaning tank can be easily formed and separated by combining the middle body and upper and lower bodies via the lifting device, and the supply and discharge of cleaning liquid into the tank is also smoothed, reducing cleaning time. This has the advantage of preventing dirty cleaning liquid from being carried into the next tank.

[Brief explanation of drawings]

1 to 5 are explanatory diagrams of embodiments of the invention of this application, FIG. 1 is an overall schematic explanatory diagram of an ultrasonic cleaning device, FIG. 2 is a cross-sectional explanatory diagram of FIG. 1, and FIG. 4 and 5 are cross-sectional views of the closed cleaning tank. FIG. 6 is an explanatory view of another embodiment. FIG. 6 is a view corresponding to FIG. The figures are explanatory diagrams of another embodiment, and FIG. 7 is a view corresponding to FIG. 5, and FIG. 8 is a partial side view of the support conveyance arm. 30, 30'...Cleaning item, 22...Cleaning liquid, 2
5, 25'...Ultrasonic vibrator, 31...Cleaning basket,
3, 3', 3''...Cleaning tank middle body, 9,9'...Cleaning tank upper body, 7,7'...Cleaning tank lower body, 2...Lower frame, 6...Upper frame, 33,33 ′...
Conveyance device, 8, 10... Lifting device, 1... Ultrasonic cleaning device.

Claims (1)

[Claims] 1. In an ultrasonic cleaning method in which an object to be cleaned is immersed in a cleaning solution in a cleaning tank and precision cleaned using an ultrasonic vibrator, the interior of the cleaning tank in which a cleaning basket containing the object to be cleaned is set is cleaned. A tank upper body and a cleaning tank lower body are closely sealed, and then a cleaning liquid is supplied into the sealed cleaning tank,
The cleaning liquid is purified and circulated while being precisely cleaned using the ultrasonic vibration energy of the ultrasonic vibrator, and after the cleaning is completed, the cleaning liquid is discharged to break the sealing state of the cleaning tank, and the contents of the cleaning tank are transferred to the next tank. An ultrasonic cleaning method characterized in that the ultrasonic cleaning process is carried to a cleaning process and the above-mentioned cleaning process is sequentially repeated. 2. In an ultrasonic cleaning device that performs precision cleaning using an ultrasonic vibrator by immersing an object to be cleaned in a cleaning liquid in a cleaning tank, a plurality of lower bodies of the cleaning tank are installed at predetermined intervals on a lower frame, and An upper body of the cleaning tank is provided on the opposing upper frame to face each of the lower bodies of the cleaning tank, and a middle body of the cleaning tank connected to a conveying device is disposed between the lower body and the upper body of each cleaning tank. Ultrasonic cleaning characterized in that it is movable and the upper, middle, and lower bodies of the cleaning tank can be brought into close contact with and separated from each other through a lifting device provided on at least one of the lower frame and the upper frame. Device.