JPH0446636B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for cleaning mechanical parts such as gears and bearings, and other small articles in a closed container.

(Prior art) Conventional methods for cleaning gears, bearings, etc. include a hot water spray method in which heated water is sprayed to degrease the gears, and an ultrasonic cleaning method in which a degreasing agent is used to apply ultrasonic waves to clean the gears. There is.

Further, as a washing machine of this type, a device is disclosed in Japanese Patent Application Laid-Open No. 168871/1983, which cleans articles by mechanically shaking the entire washing tank to vibrate the liquid.

The water level in the cleaning tank is raised by injecting high-pressure air,
Japanese Utility Model Application Publication No. 13266/1983 discloses an apparatus for cleaning articles by immersing them in a liquid and shaking the articles. In addition, the water level in the cleaning tank is raised by injecting high-pressure air, and then the water level in the cleaning tank is lowered by exhausting the high-pressure air, and the items are washed with a large flow of water that comes with raising and lowering the water level of the liquid. A machine for this purpose is disclosed in Japanese Utility Model Publication No. 48-25830.

(Problems to be Solved by the Invention) The conventional hot water spray method has a drawback in that a large casing is required to prevent the spray from scattering outward. Furthermore, when cleaning small parts using the ultrasonic cleaning method, there is a problem in that the cost increases.

In the conventional method disclosed in Japanese Patent Publication No. 56-168871, in which the cleaning tank is vibrated and resonated to generate a flow in the cleaning liquid, the entire cleaning tank must be vibrated, which requires a large amount of vibration energy and does not generate a high-speed flow. The cleaning power is weak. In addition, the entire tank vibrates, which tends to cause vibrations and adversely affect other equipment.

Next, the high-pressure air disclosed in Japanese Utility Model Application Publication No. 54-13266 is used to raise the water level in the washer tank, and cleaning is performed by shaking the article in the liquid. However, air pressure generates a high-speed flow that does not clean the area. This has the problem of being large and expensive as before. Furthermore, in the method disclosed in Utility Model Publication No. 48-25830, cleaning is attempted by water flowing in the same direction as the water level of the entire cleaning fluid rises and falls, and the entire cleaning fluid moves in the same direction. The flow of water was difficult to achieve at a high speed, and it was not possible to wash the area sufficiently with the flow of water.

An object of the present invention is to solve these conventional drawbacks and problems, and to provide a method for washing articles that is small, inexpensive, and safe without polluting the environment.

(Means for Solving the Problems) The gist of the present invention that solves the problems is as follows: (1) Water or cleaning liquid is stored in a sealed container to a required level, and washing is attempted to be carried out in the liquid in the sealed container. By immersing the item and instantly releasing the air inside the sealed container from a state of reduced pressure to the atmosphere at a short cycle of 1 to 5 Hz, a rapid increase in pressure is caused from the reduced pressure state, thereby causing a sudden rise in the liquid level inside the sealed container. A method for washing an article, characterized in that the surface of the article is washed by a high-speed flow of liquid that rises periodically and the subsequent wave motion (2) Water or cleaning liquid is placed in a closed container. The items to be washed are immersed in the liquid in the sealed container, and a pipe connected to the bottom of the sealed container is connected, and the pipe is raised upward to open the on-off valve to the atmosphere. Then, close the pipe tip opening/closing valve to reduce the pressure of the air inside the sealed container, and then release the air inside the sealed container to the atmosphere instantly, repeating this process at a short cycle of about 1 to 5 Hz, and then release the air from the reduced pressure state. By opening the opening/closing valve at the tip of the pipe in conjunction with the timing of the rapid pressure rise, a rapid rise in the liquid level in the closed container is caused, and the surface of the article is washed by the high-speed flow of the resulting slight rise in liquid and the subsequent waves. (3) A method for washing an article according to claim 1 or 2, wherein the gripping frame for holding the article in the closed container in the liquid is provided with a rotating means for rotating the article (4) A method for washing an article according to any one of claims 1 to 3, wherein an air intake port for reducing the pressure of the air inside the container is attached to the lid of the airtight container. The cleaning method according to claim 4, wherein a lid is provided (6) A pipe with an air intake hole is connected to the air intake hole of the lid of the airtight container, and the air inside the airtight container is sucked through the air intake hole of the pipe to reduce the pressure. A method for washing an article according to claim 4 (7) A method for washing an article according to any one of claims 1 to 6, wherein the liquid stored in the closed container is a strong degreasing detergent without evaporation.

(Function) In this invention, the article to be cleaned is immersed in water or cleaning liquid in a closed container, and the air inside the closed container is sucked to reduce the internal air pressure to about -400 mmHg. After sufficiently reducing the pressure, the internal space of the closed container is opened to the atmosphere or pressurized using a pump or the like to rapidly increase the pressure. When the pressure suddenly rises from the negative pressure, the liquid level instantly rises due to the impact pressure, and a high-speed flow of liquid from the bottom to the top occurs, causing the objects in the liquid to rise. The liquid passes through the bottom and between the articles to wash the articles. After the pressure rises, the rising liquid returns to the bottom, causing the liquid level to move up and down and vibrate. That vibration,
The surface of the article is also washed by the flow of liquid due to wave motion. By repeating this release and rise of negative pressure and pressure at a cycle of 1 to 5 Hz, more complete cleaning is achieved.

In this cleaning method, a pipe is connected to the bottom of the sealed container and raised upward, a vacuum valve is attached to the top end of the pipe, and when the pressure in the sealed container is reduced, the valve is closed and the air inside the sealed container is released to cause the pressure to rise. If the vacuum valve is opened before this point, the pressure difference between the air pressure in the closed container and the pipe pressure and the water level difference will increase, causing a violent upward movement of the liquid.

Here, if the article immersed in the liquid can be rotated by a rotating means and its cleaning posture can be changed, the surface of the article can be uniformly washed.
In addition, the liquid in the closed container is sealed and is safe because it hardly leaks or spills outside.

If an inner lid with a ventilation hole is provided below the intake port of the lid body, or if a pipe with an intake hole is connected to the intake port, the pressure acting range in the center can be expanded and the cleaning effect can be achieved over a wide range. generate.

(Example) Examples will be described below based on the drawings.

In the embodiment shown in FIGS. 1, 2, and 3, the ejector 1
A suction port 4 is provided in the lid body 3, and a pipe 6 with an intake hole 5 is connected to the suction port. Furthermore, the gripping frame 7 for holding the article in the liquid is made of a wire mesh, and the wire mesh is attached to a horizontal rotation shaft 8, and the horizontal rotation shaft is made freely rotatable by a handle 9.

In the figure, 10 is the pivot shaft of the lid 3, 11 is a counterweight around the pivot shaft of the lid 3, and 12 is the lid 3.
13 is an air tube, 14 is a solenoid valve with a timer for opening and closing at regular intervals, 15 is a support stand, 16 is a liquid storage tank, 17 is a liquid pump,
18 is a valve, and 19 is an article.

In this embodiment, the articles are sealed within a wire mesh gripping frame 7 and rotated by a handle 9 to ensure uniform cleaning. The negative pressure inside the closed container 2 is generated by ejecting high-pressure air of about 5 kg/cm ² from the ejector 1 to generate air suction force. In addition, the suction power is generated by distributing the suction holes over a wide range using the plurality of suction holes 5 of the pipe 6 attached to the inside of the lid body 3, thereby expanding the liquid level area where the liquid level rises over a wide range and providing a cleaning effect. Some liquid level area is increased.

In the embodiment shown in FIGS. 4 and 5, the suction port 4 of the lid body 3
An inner lid 20 is provided below the inner lid 20, and air is sucked through a ventilation hole 21 located far from the center of the inner lid 20 to prevent a portion of the rising liquid from being sucked through the suction port 4 and directly discharged to the outside. . FIG. 5 is an explanatory diagram showing the movement of the liquid at that time. Other structures are 1st, 2nd, 3rd
This is similar to the embodiment shown in the figure.

The embodiment shown in FIG. 6 has a rubber plate 3 inside the lid body 3.
1 to form a partition wall, and this rubber plate 31 is attached to the lid body 3.
By moving the air cylinder 32 attached to the container up and down, the air inside the closed container 2 is rapidly switched from a negative pressure to a pressurized state. This change in air pressure causes agitation to the liquid level, causing a flow of liquid to wash the article 19.

In the embodiment shown in FIG. 7, a pipe 40 is connected to the bottom of the closed container 2 of the embodiment shown in FIGS. At the same time, when the pressure is released from the negative pressure of the air and the pressure is suddenly increased, the liquid in the sealed container 2 flows between the pipe 40 and the sealed container 2 as the valve 41 is opened and closed.
This is an example in which the liquid level in the closed container 2 is moved between the inside and the closed container 2 to increase the rise and cause the liquid to flow at a higher speed.

In the embodiment shown in FIGS. 8 to 11, a pipe 51 is connected to the bottom pocket 50 of the sealed container 2, the tip of which is raised upwards to the liquid level, and a vacuum valve 52 is provided at the tip of the pipe 51, so that the inside of the sealed container 2 is The air is pulled through the ejector 1 and the suction pipe 53 to create a negative pressure (200 to 400 mmHg) in the upper part of the sealed container 2, and the negative pressure is released by the first
The upper vacuum valve 52 is opened at the timing shown in FIG. The opening point of the vacuum valve 52 is made earlier than the pressure release of the closed container 2 by Δtu. The timing of Δtu and Δt _L is adjusted using a timer depending on the type of items to be washed.

By opening the ejector and vacuum valve at such timing, the liquid level in the closed container is instantly and strongly raised, thereby generating a high-speed flow and performing a short-time cleaning action.

In the figure, 54 is a square pile equalizing plate, 55 is a punching metal, 56 is a wire mesh, 57 is a one-touch handle, 5
8 is a lid hinge, and 59 is a mist collector.

The invention as set forth in claim 2 of the present invention strengthens the rise in the liquid level in the closed container to cause the liquid to flow at a higher speed, thereby increasing the cleaning power. Further, according to the invention described in item 3, by rotating the article in the liquid, the degree of contact with the surface of the article by the water stream changes, so that every corner of the surface of the article can be uniformly washed. In the invention described in item 4, by providing the lid with the air intake port, it is possible to take in and take out the airtight container of articles and configure the air passage of the air intake port with a simple structure.

According to the invention described in claims 5 and 6, it is possible to widen the range of pressure action in the central part, so that the cleaning effect can be achieved over a wide range. In the seventh aspect of the invention, a strong degreasing detergent without evaporation can also be used.

(Effects of the Invention) As described above, according to the present invention, a rapid pressure change in air pressure is used to generate a high-speed flow in a liquid in a closed container, and this flow washes an article. , the device is small and can be manufactured and operated at low cost,
Furthermore, since the cleaning is carried out in a closed container, there is no environmental pollution and the cleaning can be carried out safely.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view showing an example of negative pressure generation using an ejector, Figure 2 is a plan view of the same, Figure 3 is an explanatory diagram showing the movement of the liquid level, and Figure 4 is a closed container with a double lid. A cross-sectional view showing the embodiment, Fig. 5 is an explanatory drawing showing the movement of the liquid, Fig. 6 is an explanatory drawing showing an embodiment in which the pressure is reduced by moving a rubber plate, and Fig. 7 is an explanatory drawing showing an embodiment in which the pressure is reduced by moving a rubber plate. Fig. 7 is a pipe connected to the bottom of the closed container. FIG. 8 is a plan view showing another embodiment, and FIG. 9 is a diagram illustrating an embodiment in which the pipe is opened and closed.
A sectional view taken along line A', Figure 10 is Figure 8B-
FIG. 11, which is a view taken from line B', is a time chart showing the opening and closing of the ejector and vacuum valve. 1: Ejector, 2: Airtight container, 3: Lid body,
4: Suction port, 5: Intake hole, 6: Pipe, 7: Grip frame, 8: Horizontal rotation axis, 9: Handle, 18: Valve, 19: Article, 20: Inner lid, 21: Ventilation hole, 3
1: Rubber plate, 32: Air cylinder, 40: Pipe, 41: Valve.

Claims (1)

[Claims] 1. Store water or cleaning liquid to a required level in a sealed container, immerse the article to be washed in the liquid in the sealed container, and instantly remove the air in the sealed container from a reduced pressure state. By repeating the process of releasing the air to the atmosphere at a short cycle of 1 to 5 Hz and causing a rapid pressure increase from a reduced pressure state, a rapid rise in the liquid level in the sealed container occurs periodically, resulting in a slight rise in the liquid. A method for washing an article, characterized in that the surface of the article is washed with a high-speed flow and subsequent wave motion. 2. Store water or cleaning liquid to a specified level in a sealed container, immerse the item to be washed in the liquid in the sealed container, connect a pipe that communicates with the lower part of the sealed container, and connect the pipe upward. Start up the container and open it to the atmosphere via the on-off valve, close the on-off valve at the end of the pipe to reduce the pressure of the air in the sealed container, and after the pressure has been sufficiently reduced, the air in the sealed container is instantly released to the atmosphere. Repeatedly at a short cycle of about 5 Hz, the opening and closing valve at the tip of the pipe coincides with the timing of a rapid pressure rise from a depressurized state, causing a rapid rise in the liquid level in the sealed container, resulting in a high-speed flow with a slight rise in the liquid. and a method for washing an article, characterized in that the surface of the article is washed by the subsequent wave motion. 3. The article washing method according to claim 1 or 2, further comprising a rotating means for rotating the gripping frame that holds the article in the liquid in the closed container. 4. A method for washing articles according to any one of claims 1 to 3, wherein an air intake port for reducing the pressure of the air in the closed container is attached to the lid of the closed container. 5. The cleaning method according to claim 4, wherein an inner lid having a ventilation hole is provided below the intake port of the lid of the closed container. 6. The method for washing articles according to claim 4, wherein a pipe having an air intake hole is connected to the air intake port of the lid of the airtight container, and the air inside the airtight container is sucked through the air intake hole of the pipe to reduce the pressure. 7. A method for cleaning articles according to any one of claims 1 to 6, wherein the liquid stored in the closed container is a strong degreasing detergent without evaporation.