JPH0549355B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cleaning device, which cleans mechanical parts, electronic parts, medical instruments, and various other objects by liquid or steam cleaning. The purpose is to reliably dispose of the solvent that has adhered to it without dispersing it to the outside.

BACKGROUND ART Conventionally, there is an idea described in Japanese Utility Model Publication No. 59-28714, in which a washing table on which an object to be washed is placed is connected to a moving mechanism so as to be movable.

In this invention, after the cleaning work has been completed, the cleaning target is taken out from the cleaning tank, and then the solvent adhering to the cleaning target is dried in a separate processing device. Therefore, not only does the drying process require a lot of effort, but it also comes into contact with the outside air when being transferred to the processing equipment, and if the solvent is trichlorethylene, trichlorotrifluoroethane, etc., which is undesirable for diffusion into the atmosphere, teeth,
This will cause health damage, air pollution, etc.

Furthermore, as in the invention described in Japanese Patent Publication No. 59-9228, there is an invention in which a cleaning tank and a storage chamber for the objects to be cleaned are connected through an openable/closable door, and a solvent gas processing device is connected to this storage chamber. do.

Also, as proposed in Japanese Utility Model Application Publication No. 59-110003, the storage chamber is connected to a condensing device that cools and condenses the solvent gas, and the solvent gas is removed by circulating between the condensing device and the storage chamber. There is something that does.

Problems to be solved by the invention However, the invention described in Japanese Patent Publication No. 59-9228
The cleaning tank and the storage chamber for the objects to be cleaned are connected through an openable/closable door, and a solvent gas processing device is connected to this storage chamber, but the gas containing the solvent gas is allowed to pass through the processing device only once. After that, it is released into the atmosphere, so much of the solvent gas is released to the outside in an untreated state, making it difficult to reliably remove harmful substances.

In addition, the invention described in Utility Model Application Publication No. 59-110003 is
The storage chamber is connected to a condensing device that cools and condenses the solvent gas, and the solvent gas is circulated between the condensation device and the storage chamber to remove the solvent gas, but there is a limit to the amount of solvent gas that can be removed by condensation. However, a large amount of solvent gas was released to the outside in an untreated state.

That is, the above method removes the solvent gas by cooling and condensing it. A constant vapor pressure is maintained at the normal cooling and condensing temperature of about 0 to 20°C. Therefore, for example, the boiling point is 47.6
When CFC is cooled to 10℃, the vapor pressure is 0.25
Kgf/cm2・abs, which maintains a concentration of 250,000 ppm. Therefore, the above concentration of fluorocarbons when cooled and condensed at 10° C. cannot be lowered to 250,000 ppm or less.

Therefore, if the cooling condensing device is located in a circulation path that can circulate the solvent gas, and even if the solvent gas is circulated multiple times, the concentration cannot be lowered, and if the storage chamber is opened to take in and out the items to be cleaned, In this example, 250,000 ppm of solvent gas will be released to the outside.

Further, since the conventional processing apparatus described above is formed separately from the cleaning tank, it becomes a large and complicated mechanism, which increases the cost of recovering the solvent.

The present invention is an attempt to solve the above-mentioned problems.The present invention is aimed at solving the above-mentioned problems, and includes the following steps:
This can be done within the cleaning equipment without any hassle. Furthermore, it is an attempt to prevent harmful substances from being diffused to the outside using a simple mechanism at a low cost.

Means for Solving the Problems The present invention solves the above problems by:
A cleaning process in which the washing table on which the items to be cleaned are placed is connected to a moving mechanism so that the position can be moved freely, and the upper part of the washing tank is covered with a casing. The processing chamber and the cleaning tank can be moved back and forth between the chamber and the cleaning tank through a communication port, the processing chamber and the cleaning tank can be shielded by a shielding body, and covering bodies are provided at regular intervals around the outer periphery of the casing. A circulation path is formed between the inner surface of the covering and the outer surface of the casing, and a treatment mechanism for treating a solvent made of activated carbon is located within the circulation path.

Further, the activated carbon may be formed in a cassette shape and made exchangeable from the circulation path.

Further, the processing mechanism may be provided with a heating section and a cooling section, so that the solvent adsorbed on the activated carbon is separated by heating, and the solvent is cooled and condensed in the cooling section, so that the solvent can be recovered.

In addition, the shield forms a cleaning table with a diameter larger than the communication port that communicates the processing chamber and the cleaning tank, and the cleaning table is connected to the processing chamber when the cleaning table is moved and the object to be cleaned is stored in the processing chamber. The processing chamber and the cleaning tank may be shielded by pressingly engaging the outer periphery of the communication port of the cleaning tank and sealing the communication port.

Further, the shielding body may be one that opens or shields the communication port between the processing chamber and the cleaning tank by an external operation.

Function Since the present invention is configured as described above, the moving mechanism is operated to insert the cleaning table on which the object to be cleaned is placed into the cleaning tank, and perform liquid cleaning, steam cleaning, etc. After completing this liquid cleaning and steam cleaning, the moving mechanism is operated again to move the object placed on the cleaning stand.
It is stored in a processing chamber connected to the cleaning tank. After or simultaneously with the storage, the processing chamber and the cleaning tank are shielded by a shielding body, and a processing mechanism for removing the solvent adhering to the object to be cleaned is activated.

Since this treatment mechanism has activated carbon in a circulation path through which gas can circulate, the gas in the treatment chamber can repeatedly and continuously come into contact with the activated carbon. Therefore, the solvent removal operation can be repeated until the organic solvent and the like adhering to the object to be cleaned are reliably removed. After this treatment, if the object to be cleaned is taken out of the treatment chamber, harmful gases will not be diffused into the atmosphere and will not be inhaled by the operator.
Enables complete cleaning work.

Further, the object to be cleaned with the solvent attached thereto is stored in the processing chamber from the cleaning tank without leaving the cleaning device, and the attached solvent is treated. Therefore, unlike the conventional method, not only is there no need for transferring the object to be cleaned to the processing mechanism, but there is also no need to diffuse the solvent.

In addition, the circulation path includes a coating provided at regular intervals around the outer circumference of the casing, a circulation path formed between the inner surface of the coating and the outer surface of the casing, and a processing mechanism located inside the circulation path. This is what I did. Therefore, the apparatus can be downsized and simple and inexpensive solvent treatment can be performed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a washing table on which an object to be washed 2 is placed, and an appropriate moving mechanism 3 such as an air cylinder, an oil cylinder, or a chain device. It is connected to and is formed to be movable in the vertical direction. By operating the moving mechanism 3, this washing table 1 connects the object 2 placed on the upper surface to the upper part of the washing tank 4 through the communication port 7, and connects the processing chamber 5 and the washing tank 4. Allows for round-trip movement between the two locations. Further, the processing chamber 5 and the cleaning tank 4 can be shielded by a shielding body 6.

Further, this shielding is achieved by forming the cleaning platform 1 to have a diameter larger than that of the communication port 7 that communicates the processing chamber 5 and the cleaning tank 4, as shown in FIGS. 1 and 2. That is,
When the cleaning table 1 is moved and the object 2 to be cleaned is stored in the processing chamber 5, the cleaning table 1 is pressed into engagement with the outer periphery of the communication port 7 between the treatment chamber 5 and the cleaning tank 4, as shown by the two-dot chain line. . By sealing the communication port 7, the processing chamber 5 and the cleaning tank 4 are shielded, and the shield 6 and the cleaning table 1 are also used.

Further, the communication port 7 between the cleaning tank 4 and the processing chamber 5 is covered by a lid 10 that does not have any special fixing means and is placed on the processing chamber 5 side. When the object 2 to be cleaned is located in the cleaning tank 4, the communication port 7 is always closed. Further, when the washing table 1 is raised, the cover body 10 is lifted and opened by the support rod 11 protruding from the upper surface of the washing table 1 as shown by the two-dot chain line.

Further, the processing chamber 5 is formed by covering the upper part of the cleaning tank 4 with a casing 8. Furthermore, covering bodies are provided on the outer periphery of the casing at regular intervals, and a circulation path is formed between the inner surface of the covering body and the outer surface of the casing.

Further, a processing mechanism 13 for removing the solvent adhering to the object 2 to be cleaned is located within the circulation path 12 . This treatment mechanism 13 forms activated carbon 14 that can adsorb a solvent in a fixed or cassette shape,
It is exchangeable.

Further, the circulation path 12 is provided with a fan 16 at an inlet 15 connected to the processing chamber 5 for forcibly introducing solvent gas into the circulation path 12. Furthermore, in the processing chamber 5 located opposite the introduction port 15,
The outlet 17 of the circulation path 12 is opened to enable forced circulation of the solvent gas.

In the structure as described above, in order to perform liquid cleaning or steam cleaning on the object 2 to be cleaned, the moving mechanism 3 is operated to move the cleaning table 1 on which the object 2 to be cleaned is placed into the cleaning tank 4. Insert downward. Then, liquid cleaning, steam cleaning, or both cleaning is performed. After completion of this liquid cleaning and steam cleaning, the moving mechanism 3 is operated in the upward direction of the cleaning platform 1, and the object to be cleaned 2 placed on the cleaning platform 1 is moved to the processing chamber provided at the upper part of the cleaning tank 4.
The cleaning tank 4 and the processing chamber 5 are sealed off.

In this shielding, the cleaning table 1 is formed to have a larger diameter than the communication port 7, so if the cleaning table 1 accommodates the object 2 to be cleaned in the processing chamber 5, the two points shown in FIGS. As shown by the chain line, the upper surface of the washing table 1 is pressed against the outer periphery of the lower surface of the communication port 7. Then, the communication port 7 can be sealed, and the processing chamber 5 and the cleaning tank 4 can be shielded.

After this shielding is performed, when the fan 16 is operated, the air in the processing chamber 5 is forced to flow into the circulation path 12 together with the solvent gas, and the activated carbon 14 adsorbs and removes the solvent gas.

Then, this adsorption/removal gas is introduced into the inlet 15 from the circulation path 12 through which the gas can circulate, via the outlet 17 and the processing chamber 5 . Therefore, the gas in the processing chamber 5 can be repeatedly and continuously processed by the processing mechanism 13 until the solvent gas is completely removed, and the organic solvent etc. adhering to the object to be cleaned 2 can be reliably removed. It can be removed.

If the object to be cleaned 2 is taken out from the treatment chamber 5 after this treatment, a complete cleaning operation can be performed without the need for harmful gases to be diffused into the atmosphere or inhaled by the operator.

Moreover, if the activated carbon 14 constituting the processing mechanism 13 is made into a cassette shape, the activated carbon 14 can be easily replaced, and excellent solvent gas adsorption efficiency can always be obtained.

Further, since the object 2 to be cleaned with the solvent attached thereto is stored in the processing chamber 5 without exiting from the cleaning device and the attached solvent is removed, the object 2 to be cleaned is not transferred to the processing mechanism 13 as in the conventional case. Not only does it not require the number of transfer steps described above, but it also does not cause the solvent to diffuse.

Further, in the above embodiment, the shield 6 was also used as the washing table 1, but in other different embodiments, the third
As shown in FIG. 4, a pair of flat shields 6 are supported by support shafts 18 on both sides of the lower surface of the washing table 1 so as to be openable and closable. Then, the engaging portion 20 projects outward from the support shaft 18 . This engaging portion 20 is engaged with the outer periphery of the communication port 7 between the processing chamber 5 and the cleaning tank 4 when the object 2 to be cleaned is stored in the processing chamber 5 as the washing table 1 moves. The shield 6 is then rotated using the support shaft 18 as a fulcrum.
By rotating the shielding member 6 and sealing the shielding body 6, the processing chamber 5 and the cleaning tank 4 are shielded.

This shielding is performed by the shielding body 6 as the washing table 1 rises.
The engaging portion 20 protruding from the side surface is engaged with the engaging frame 21 protruding from the outer periphery of the communication port 7 on the cleaning tank 4 side.
The processing chamber 5 and the cleaning tank 4 are shielded by rotating and sealing the shielding body 6 using the support shaft 18 as a fulcrum.

Furthermore, the shielding method using the shielding body 6 does not necessarily have to be the above-mentioned method, and any method can be selected. may be opened or shielded by any method such as a shutter.

Further, the storage of the object 2 to be cleaned in the processing chamber 5 may be detected by an appropriate sensor, and the processing chamber 5 and the cleaning tank 4 may be shielded with a shield 6 such as a shutter.

Further, in the embodiment described above, the processing mechanism 13 is configured such that the activated carbon 14 adsorbs the solvent gas and is formed into a cassette shape or the like so that it can be replaced as needed. However, in other different embodiments, the treatment mechanism 13 is configured so that the activated carbon 14 does not need to be replaced.

That is, as shown in FIG. 2, a heating section 24 is provided in which a piping 23 is connected to a heating means 22 such as a boiler in a circulation path 12 filled with activated carbon 14 at appropriate intervals. The heating sections 24 are located at intervals between the filled activated carbons 14, and heat the solvent adsorbed on the activated carbon 14 to gasify it. and,
A cooling part 26 connected to a cooling water tank 25 by piping 23 is provided near the outlet 17 at the end of the circulation path 12,
Ru. Then, the solvent adsorbed on the activated carbon 14 is separated by heating, cooled and condensed in a cooling section 26, and can be recovered in a recovery container 27. It is desirable to recover the solvent by heating over a certain period of time after the cleaning operation is completed.

Effects of the Invention Since the present invention is constructed as described above, the solvent attached to the object to be cleaned after cleaning can be removed.
It is carried out while remaining inside the cleaning equipment, and no harmful solvents are spread outside.

Furthermore, since the treatment of the solvent gas is performed using activated carbon and the treatment mechanism is connected to the storage chamber via a circulation path through which the gas can circulate, the solvent gas is adsorbed and reduced each time it passes through the activated carbon. Then, the solvent removal operation can be repeated until the organic solvent and the like in the storage chamber are reliably removed.

Since this treatment is carried out repeatedly through a circulation path through which the solvent gas can circulate, even if the treatment mechanism has a small capacity, it will have a high level of solvent gas treatment capacity. Therefore, it is possible to obtain a small and inexpensive processing mechanism.

Furthermore, the circulation path is constructed by providing a covering at regular intervals around the outer periphery of the casing of the processing chamber, and forming a circulation path between the inner surface of the covering and the outer surface of the casing. It is small and simple, and enables inexpensive solvent treatment.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a cross-sectional view, FIG. 2 is a cross-sectional view of a different embodiment provided with a recovery mechanism for the solvent adsorbed on the adsorbent, and FIG. 3 is a cross-sectional view of a shielding body. FIG. 4 is a cross-sectional view showing a state in which the object to be cleaned is cleaned, showing a different embodiment. FIG. 4 is a cross-sectional view showing a state in which the solvent is removed in the embodiment of FIG. DESCRIPTION OF SYMBOLS 1...Cleaning table, 2...Object to be cleaned, 3...Movement mechanism, 4...Cleaning tank, 5...Processing chamber, 6...Shielding body, 7...Communication port, 12...Circulation path, 13 ...Treatment mechanism, 14...Adsorption substance, 24...Heating section, 2
6...Cooling section.

Claims (1)

[Scope of Claims] 1. By connecting the washing stand on which the object to be cleaned is placed and making it movable in position by connecting it to a moving mechanism, the object to be washed placed on the washing stand can be moved by moving the upper part of the washing tank to the casing. It is possible to reciprocate through a communication port between the processing chamber and the cleaning tank, which are covered with A coating is provided through the casing, a circulation path is formed between the inner surface of the coating and the outer surface of the casing, and a processing mechanism for treating a solvent made of activated carbon is located within the circulation path. cleaning equipment. 2. The cleaning device according to claim 1, wherein the activated carbon is formed in a cassette shape and is replaceable from the circulation path. 3. The treatment mechanism according to claim 1 or 2, characterized in that the treatment mechanism is provided with a heating section and a cooling section, so that the solvent adsorbed on the activated carbon is separated by heating, and the solvent is cooled and condensed in the cooling section, so that the solvent can be recovered. cleaning equipment. 4. The shield forms a cleaning table with a diameter larger than the communication port that communicates the processing chamber and the cleaning tank, and when the cleaning table is moved and the items to be cleaned are stored in the processing chamber, the cleaning table is connected to the processing chamber and the cleaning tank. 2. The cleaning device according to claim 1, wherein the processing chamber and the cleaning tank are shielded by pressingly engaging the outer periphery of the communication port of the tank and sealing the communication port. 5. The cleaning device according to claim 1, wherein the shield opens or blocks the communication port between the processing chamber and the cleaning tank by an external operation.