JPH0677908B2 - Cleaning workbench - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning workbench, and more particularly to a cleaning workbench suitable for preventing cross contamination when handling a plurality of samples in the cleaning workbench.

[Background of the Invention]

As one example of the conventional clean workbench for handling harmful substances and dangerous pathogens is disclosed in Japanese Utility Model Publication No. 58-32746, the workbench of the workbench is not divided into a plurality of sections. Therefore, when a plurality of samples are handled in the workbench, particles generated from each sample may adhere to other samples, resulting in cross contamination.

That is, in the conventional cleaning workbench, since the air suction ports are provided only in front of and behind the work surface, when the clean air supplied from above reaches the work surface, the air flow is directed in a direction substantially parallel to the work surface. Change and flow toward the front and rear suction ports.
Ideally, this airflow should flow evenly to the front and rear suction ports, but in reality, a large amount flows to either side due to the difference in the suction pressure at the front and rear suction ports. The direction may be reversed due to pressure fluctuations. Therefore, when a plurality of samples are placed on the work surface, particles generated when one sample is handled may adhere to other samples on the leeward side to cause cross contamination. Further, since dust generated by an operator or the like during the work is carried along with the airflow flowing along the work surface, there is a problem that a considerable part of the leeward side of the work position is contaminated.

[Object of the Invention]

An object of the present invention is to provide a cleaning workbench capable of effectively preventing cross contamination inside the cleaning workbench.

[Outline of Invention]

The present invention is a work chamber, an air supply filter disposed above the work chamber to purify air supplied from a blower,
In a cleaning workbench equipped with an exhaust duct for sucking and exhausting air in the work chamber, a substantially flat work surface formed at the bottom of the work chamber and a row formed so as to divide the work surface into predetermined sections. -Like air circulation means, a chamber part for communicating this air circulation means with an exhaust duct, and an exhaust filter disposed between the chamber part and the exhaust duct, the air circulation means standing up from the work surface. It is characterized in that it has an opening formed at a different position.

The work surface is divided into predetermined compartments by the row-shaped air circulation means, and an air curtain is formed between the filter and the air circulation means, so that cross contamination between the compartments divided in the work chamber can be prevented. Since the air circulation means communicates with the exhaust duct via the chamber portion and the exhaust filter, the suction wind speed of each portion of the air circulation means can be kept substantially constant, and a stable air curtain can be formed. The work surface is formed on the bottom of the work chamber in a substantially flat shape, and the air circulation means has an opening formed at a position rising from the work surface, so that even if contaminants spill on the work surface, it can be easily cleaned. Since it can be formed and does not remain, contamination can be prevented and contaminants can be prevented from entering the opening of the air circulation means. As a result, in the present invention, it is possible to effectively prevent the movement of the contaminants between the respective compartments in the work chamber, and effectively prevent the cross contamination.

Example of Invention

 An embodiment of the present invention will be described below with reference to FIGS.

A first embodiment of the present invention is shown in FIGS.

In this embodiment, an air supply filter 5 for supplying clean air to the clean room 1 is mounted on the upper surface of the clean room 1, and the upstream side of the air supply filter 5 is connected to the blower outlet of the blower 3 via the pressure chamber 4. It is in communication. The lower surface of the clean room 1 is provided with a work surface 9 having an opening 10 serving as an air circulating means and divided into sections A to G. The front and rear surfaces of the work surface 9 are provided with air suction ports 8a and 8a, respectively. 8b is provided. Air inlet 8a, 8b
And the opening 10 is formed by a plurality of holes as shown in FIG. When handling a liquid sample in the clean room 1, the working surface 9 is formed to be lower than the air inlets 8a and 8b as shown in FIG. 1, and the opening 10 is formed as shown in FIG. If a rising edge 9a is formed around the work surface, even if the sample spills on the work surface 9, it remains on the work surface 9 so that it can be wiped off, and diffusion of contamination to other parts can be minimized. . Sliding vertically on the front side of the clean room 1,
An opening / closing door 7 for separating the clean room 1 and the outside world 50 is provided. The air suction port 8a provided below the opening / closing door 7 not only sucks the air in the clean room 1, but also sucks the outside air from the opening surface 2 when the opening / closing door 7 is opened, so that the air curtain is opened. To prevent contaminants in the external environment 50 from entering the clean room 1. The air sucked from the air suction ports 8a, 8b and the opening 10 is cleaned by the exhaust filter 6, and then, via the duct portion 12 provided on the back side of the cleaning chamber 1,
It is sucked by a blower (not shown) and discharged to the outside.

In the present embodiment, the wind velocity distribution in the AA ′ cross section of FIG. 3 shows that the wind velocity becomes faster at the opening 10 as shown in FIG.
The air curtain effect can be obtained. This is section C,
The same applies to the openings 10 provided between D and between the sections F and G.

A second embodiment of the present invention is shown in FIGS.

In this embodiment, the present invention is applied to a double-sided work type cleaning workbench.

In this embodiment, opening / closing doors 7 slidably provided in the up-and-down direction are provided on two opposing surfaces of the clean room 20, respectively.
An air suction port 8a is provided below the opening / closing door 7. An air supply filter 5, a pressure chamber 4, and a blower 3 are provided on the upper surface of the clean room 20 to supply clean air into the clean room 20. On the lower surface of the clean room 20, openings 10 are formed in a straight line at a substantially central portion at a predetermined pitch, and the work surface 1 is divided into two sections H and I.
9 is provided. An exhaust filter 6 is provided below the work surface 19, and the air cleaned by the exhaust filter 6 is sucked by a blower (not shown) through the duct 22 and exhausted to the outside. According to this embodiment, even if a plurality of workers work simultaneously from the facing opening surfaces 2, the opening 10
With the air curtain, the dust generated by one worker does not affect the other worker during the work, and the sample can be easily transferred between the workers, thus improving the work efficiency in collaborative work. Is improved. In the above embodiments, the work surfaces 9 and 19 have no opening other than the opening 10 so that the liquid does not spill, but the present invention is not limited to this. FIG. 7 shows a third embodiment of the present invention, in which the upper surface 9b of the workbench is a perforated plate on the whole surface, and the tray 24 is appropriately placed on this plate, and the upper surface 24a of the tray 24 is placed on the work surface. In addition, the gap 26 between the trays 24 serves as an air circulating means for separating each section with an air curtain. With this configuration, the size and arrangement of each section can be freely set. Further, FIG. 8 shows a fourth embodiment of the present invention, in which the upper surface 9c of the workbench is deepened, and the tray 24 is placed thereon via the spacer 28.
The above work can be performed, and the upper surface 24a of the tray 24 serves as a work surface. Also in the present embodiment, the gap 26 between the trays 24 serves as an air circulating means for separating each section with an air curtain. In this embodiment, the tray 24 is removably fixed to the spacer 28 so that the tray 24 can be used when the sample or the like handled in the clean room is harmless.
Can be easily cleaned. If the sample handled in the clean room is harmful, use the tray 24 as a spacer.
Permanently fixed to 28 to prevent harmful substances from going out of the clean room together with tray 24.

FIG. 9 shows a fifth embodiment of the present invention. In this embodiment, the work surface is the upper surface 9b of the work table which is a perforated plate, and a plurality of holes 10 having a larger opening than the perforated plate are provided at the boundaries of each section of the work surface 9b as air circulation means. Is. When the sample handled in the clean room is a relatively large solid, by applying this embodiment, it is possible to effectively prevent the turbulence of the air flow due to the presence of the sample.

A sixth embodiment of the present invention is shown in FIGS.

In the present embodiment, the present invention is applied to the connecting portion of each cleaning workbench of the line configured by connecting the cleaning workbench. First
FIG. 10 is a plan view showing a working surface of an example of the above line.
In this embodiment, the clean workbench modules B1, B2, B
3, B4, B5 are connected, and an article handled inside is worked from the work opening surfaces D1, D2, D3, D4, D5. Modules B1 to B4 are respectively provided with air suction ports 8a and 8b on the work opening surface side and the back surface side of the work surface 30, respectively.
An opening 34 or 36 is formed in the connecting portion as an air circulating means that separates the J, K, L, and M sections with an air curtain. The module B5 is provided with an air suction port 8a on the work opening side of the work surface 30 and a connection opening on the back side, and the air suction port 37 on the back side is an air curtain between the compartments M and N. It functions as an air distribution means for isolation.

The opening 34, which is an air circulating means, may be provided on the frame 32 that is detachably provided as shown in FIGS. 11 to 13,
According to this, the work of connecting the worktables can be facilitated. The connecting portion is bolted to the bottom plate 38 of the workbench on the lower outside.
When tightening with the nut 40, it may be configured as shown in FIG. 11, and when tightening with the bolt / nut 40 from the inside of the work table of the bottom plate 38, it may be configured as shown in FIG. 12 or 13. May be. In FIG. 13, one end portion of the bottom plate 38 is bent so as to cover over the bent rising portion of the other bottom plate and is fastened with bolts and nuts 40. According to this structure, when a liquid sample is handled in the clean room, even if the sample spills into the opening 34, it can be prevented from leaking to the outside of the cleaning work table through the connecting portion. Further, the air circulating means may be a slit 44 formed in the louver 42 as shown in FIG.

Further, the air circulation means may be directly formed on the work surface 30 as shown in FIG. In the figure, an opening 36 or 37, which is an air circulating means, is provided at one end of the adjacent work surface.
Formed to engage the bent end of the other work surface. The bottom plate 38 is fastened with bolts and nuts 40 via a connecting fitting 38a fixed to the lower outside. According to the configuration of this figure, the number of parts of the connecting portion can be reduced.

According to the present embodiment, even if the pressure in the clean room is different for each cleaning workbench, it is possible to prevent the air in the clean room with the higher pressure from flowing into the clean room with the lower pressure. Further, even if the air flow patterns differ due to the difference in the pressure field patterns in the adjacent clean chambers, the interference of the pressure field patterns in the respective clean chambers can be prevented and the air flow patterns are not disturbed.

Further, according to the present embodiment, even when a series of work is continuously performed in a connected clean room, cross contamination can be prevented without providing partitions for each section, so that the delivery of articles between sections Etc. can be performed smoothly and workability is improved. Furthermore, since the goods are delivered between each process in the cleaning workbench, the goods do not come into contact with the outside air during the transportation process between each step, so it is possible to prevent contamination by dust and other bacteria in the outside air, and perform the cleaning work. It is possible to prevent the harmful substances handled in the table from leaking to the outside, and to obtain a highly safe cleaning work table.

〔The invention's effect〕

According to the present invention, it is possible to obtain a cleaning workbench that can effectively prevent cross contamination inside the cleaning workbench.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a structure of a cleaning workbench according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing a shape of an opening which is an air circulating means in the first embodiment of the present invention. FIG. 3 is a plan view showing a work surface in the first embodiment of the present invention, FIG. 4 is a wind velocity distribution view on the AA ′ surface in FIG. 3, and FIG. 5 is a cleaning workbench in the second embodiment of the present invention. FIG. 6 is a side sectional view showing the structure, FIG. 6 is a plan view showing a work surface in the second embodiment of the present invention, and FIG. 7 is a side sectional view showing the structure of a cleaning workbench in the third embodiment of the present invention. 8 is a side sectional view of a cleaning workbench in the fourth embodiment of the present invention, FIG. 9 is a side sectional view of a cleaning workbench in the fifth embodiment of the present invention, and FIG. 10 is a sixth embodiment of the present invention. FIG. 11 is a plan view showing the work surface of the cleaning workbench in FIG. 11, FIG. 11 is a CC ′ cross-sectional view showing the structure of the connecting portion, and FIG.
FIG. 14 is a sectional view showing a modified example of the structure of the connecting portion, and FIG. 15 is a sectional view showing the structure of the connecting portion in which the air circulating means is directly provided on the work surface. 2, D1, D2, D3, D4, D5: Working opening, 9,9b, 19,24a: Working surface, 10,26,34,36,37,44: Air circulation means, 24: Tray, B1,
B2, B3, B4, B5: Module.

Claims (1)

[Claims] 1. A cleaning system comprising: a working chamber; an air supply filter disposed above the working chamber to purify air supplied from a blower; and an exhaust duct for sucking and exhausting the air in the working chamber. In the workbench, a substantially flat work surface formed at the bottom of the work chamber, a row of air circulation means formed so as to divide the work surface into predetermined sections, and the air circulation means are exhausted by the exhaust gas. A chamber part communicating with the duct and an exhaust filter disposed between the chamber part and the exhaust duct are provided, and the air circulation means has an opening formed at a position rising from the work surface. A clean workbench characterized by this.