JPS6397237A - Clean working bench - Google Patents

Abstract

PURPOSE:To facilitate the attachment and detachment of the cover of the guide part of a door by providing the cover for covering the guide part to the door, and hinging the cover free to open and close to the main case body to form the clean working bench. CONSTITUTION:The working bench 20 is provided in the main case body 1, and an opening 22 is furnished on the front face of the case body to operate on the working bench 20. Flat planes 28 consisting of the same plane are formed around the opening 22, and studs 30 for fixing a closing cover is welded to the flat planes 28. The door 24 is provided to the opening 22, and the door 24 is held by the guide part 26 so that the door is made free to slide. The door 24 is held by the guide part 26 so that the distance between the door 24 and the flat plane 28 is made longer than the length of the stud 30, and the contact of the door 24 with the stud 30 is prevented when the door is opened and closed. The door 24 is formed by furnishing aluminum, etc., around a transparent glass sheet.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clean workbench that handles harmful substances inside, and particularly improves the workability of installing a sealing cover to seal the opening during sterilization and airtightness testing. The present invention relates to a clean workbench equipped with a door guide cover suitable for cleaning.

[Conventional technology]

In the conventional device, as shown in FIGS. 13 and 14, the cover 102, 103, 104 of the guide part of the door 124, which is slidably provided in the working opening 122 of the main body case 101, is screwed into the main body case 101. It was fastened. cover 102,
Like the main body case 7101, the parts 103 and 104 are made of steel plates or the like, so they are heavy, and because of their elongated shape, a moment is applied during the dipping process, making them difficult to handle and requiring a lot of effort to attach and detach. Therefore, when the inside of the main body case 101 is sterilized with formaldehyde gas or the like, the covers 102, 103, and 104 are attached, and then the airtight cover 110, such as a vinyl sheet, is attached thereon. However, the sealing cover 110 is
As shown in the figure, since about half of the main body 101 is attached to the cover, work efficiency is poor, and the covers 102, 103, 1
If 04 was left attached, it was difficult to maintain airtightness due to the unevenness of the surface and the joints of the covers. Incidentally, related devices of this type include, for example, Japanese Patent Application Laid-Open No. 59-213438.

[Problem that the invention seeks to solve]

The above conventional technology does not take into account the workability of installing the sealing cover of the opening during sterilization and airtightness tests, and it takes time to attach and remove the door guide part (-), and the sealing cover does not fit properly. The purpose of the present invention, which has had the problem of difficulty in maintaining airtightness during installation, is to provide a flat plate for attaching a sealing cup formed around the opening by making it easier to attach and detach the cup (-) of the guide part of the door. The objective is to make it possible to easily expose the exposed surface and improve workability when installing the airtight cover.

[Failure to solve the problem]

The above object includes a workbench, a main body case provided surrounding the workbench and having an opening on at least one side, and a door slidably provided in the main body case to open and close the opening. This is achieved by forming a flat surface around the opening in the clean workbench equipped with the workbench, and by hinged a cup provided to cover the guide part of the door to the main body case so as to be able to be opened and closed. be done.

[Effect]

The main body case isolates the workbench from the outside and maintains the required atmosphere on the workbench. The door is slidably provided in the main body case via a guide portion, opens and closes a working opening provided in the main body case, and forms an opening having an opening size necessary for working.

The flat surface formed around the opening brings the airtight cover into close contact with the main body case to maintain airtightness. A cover that covers the guide part of the door is hinged to the main body case and is provided so that it can be opened and closed.

As described above, the flat surface around the opening can be exposed simply by opening the cover attached to the main body case.

〔Example〕

Embodiments of the present invention will be explained with reference to FIGS. 1 to 12.

1 to 3 show a cleaning workbench according to a first embodiment of the present invention.

A workbench 20 is provided inside the main body case 1, and the front surface 3 is opened so that work can be performed on the workbench 20.

An opening 22 is provided therein. A flat surface 28 having the same plane is formed around the opening 22, and in this embodiment, a stud 30 for attaching the sealing cover 10 is welded to the flat surface 28. The length of the stud 30 is between 6 and 8 to be sufficient to install the sealing cover 10.
It is set to about mm. A door 24 is provided in the opening 22, and the door 24 is slidably held by a guide portion 26. The guide part 26 holds the door 24 so that the distance between the door 24 and the flat surface 28 is longer than the length of the stud 30, and the guide part 26 holds the door 24 so that the distance between the door 24 and the flat surface 28 is longer than the length of the stud 30.
4 from contacting the stud 30.

The door 24 is formed by providing a frame made of aluminum or the like around a transparent glass plate, and is supported by a constant load spring 32 to facilitate opening and closing, so that it can be stopped at any position when opening and closing.

On both sides 1111 of the opening 22, there is a cover 3 that covers the guide portion 26.
is attached with a hinge 5 so that it can be opened and closed. A cuckoo 4 is attached to the upper blade of the opening 22 to cover an inspection cover 6 for blowers, filters, etc. stored in the main body case 1.

The cover 2 that covers the flat surface 28 and the top of the door 24 is the hinge 5
It is installed so that it can be opened and closed freely. Opening 2 of workbench 20
The side 20a facing 2 protrudes beyond the flat part 28, and the side 20a facing the cover 3
It is formed so that it is approximately the same height as the Therefore, in a clean workbench of the type that completely closes the door 24, this protruding portion 20a functions as a stopper for the door 24, and the door 24 is completely closed.
In a clean workbench of the type in which the workbench 4 is fully closed, it functions as a run-up section for the suction airflow to the air curtain suction port 20b provided facing the opening 22 of the workbench 20. In normal use of the clean workbench, as shown in FIG. 2, the covers 2 and 3 are closed, and the top of the door 24 and B2
4. Covers the guide portions 26 on both sides of 4. The covers 2 and 3 are fixed to the main body case 1 by fasteners or foundation stones (not shown),
It is configured so that it is kept closed during normal use and can be easily opened by hand during sterilization, etc., without using any tools. Flat surface 2 below the protrusion 20a of the workbench 20
A cap nut 31 is screwed onto the stud 30 installed in the hole 8 so that it is safe even if it is touched by an operator's hands. During sterilization work and airtightness testing, a sealing cover 10 covering the opening 22 and door 24 is attached to the flat surface 28, as shown in FIG. The sealing cover 30 is provided with a fixing hole at a position corresponding to the stud 30 planted on the flat surface 28, and a nut 33
It is fastened to the stud 30. In this embodiment, in order to maintain the airtightness of the main body case 71, there are studs 3 on the flat surface 28.
0 was implanted, but a hole was drilled in the flat surface formed on the surface of the part of the main body case 1 that is kept under negative pressure, a nut was welded to the back side, and the airtight cover 10 was tightened with bolts. You may also do so.

A cleaning workbench according to a second embodiment of the present invention is shown in FIG. In this embodiment, the door 24 is provided on the inner surface of the opening 22, and the periphery of the opening 22 is completely flat to form a flat surface 28. In this embodiment, the guide portion 26 is provided inside the flat surface 28 . According to this embodiment, since a flat plate can be used as the airtight cover, the storage space for the airtight cover can be reduced. It's a trench, cover 3 and door 2.
There is no need to provide a hole for the relief hole 4, and the cover 3 can be manufactured easily.

In the above embodiment, the cover 2 has a lighting lamp 40 inside.
is attached and used as a lighting cover. Therefore, for maintenance and inspection of the lighting lamp 40, it may be necessary to open and close it separately from sterilization and airtightness testing.In this case, there is no need to separate the cover 2 from the main case 1, making maintenance and inspection of the lighting easy. become.

In order to further facilitate maintenance and inspection of the lighting, the cover 2 may be kept open.

- For example, as shown in FIGS. 5 to 7, flange-shaped protrusions 2a are provided on both sides of the cover 2, and the cover 2 is held down by the cover 3 to maintain the open state. The means for keeping the cover 2 in the open state is not limited to a flange-like protrusion, and a stopper, a magnet, or the like may also be used.

In the example shown in FIGS. 5 to 7, notches 3a are provided in the cover 3 corresponding to the respective positions of the protrusions 2a in the open and closed positions of the cover 2. , as shown in FIG. 5, the protrusion 2a is locked by the lower notch 3a, 7.

It will be done. In order to keep the cover 2 open for inspection of the illumination lamp 40, etc., first, the covers 3 on both sides are opened, the cover 2 is raised upward, and in this state, the covers 3 on both sides are closed. As a result, the projection 2a is locked by the upper notch 3a, and the cover 2 is held in the open position. Therefore, since the cover 2 does not need to be held by a worker, maintenance and inspection of the illumination light 40 inside the cover 2 can be easily performed even when there is only one worker.

Among clean workbenches, those called safety cabinets are required to keep the main body case airtight according to Ministry of Education Notification No. 46, so the airtightness of the inspection cover for the built-in equipment must be maintained. It is necessary to be able to inspect it. In the cleaning workbench in the first and second embodiments of the present invention, a blower and filter inspection cover 6 is provided inside the cover 4, and it is required that the airtightness of this inspection cover 6 can be inspected. Ru. Cover this airtightness inspection 4
An example in which this can be done easily without removing the is shown in FIGS. 8 to 10.

, 8.

To check the airtightness, the main body case is generally filled with 7 Leon gas at a predetermined pressure, and a Freon leak detector is used to measure the presence or absence of leaks from the gaps. A gap with a width of about 20 to 50 mm is sufficient for inserting the sensor part of the Freon leak detector. FIG. 8 shows an inspection opening 4a in the cover 4.

This is an example in which 4b is provided. The opening 4a is usually covered by a cover 4c.
It is closed with screws to prevent dust and foreign matter from getting inside. Opening 4b provided on the side of cover 4
may be closed with a plate-shaped cover (not shown), but it may also be closed using the side surface of the cover 3.
0i9 and 10 show a lid 4d hinged to the cover 4 so that it can be opened and closed. The lid 4d is attached to the cover 4 with a hinge 5 so as to be openable and closable, and FIG. 9 shows the closed state and FIG. 10 shows the open state.

A third embodiment of the present invention is shown in FIGS. 11 and 12.

In this embodiment, an intake port 6 is provided on the back side of the workbench 2o.
4 is provided to balance the airflow with the front side suction port 20b.

A sliding adjustment plate 66 is attached to the intake port 64 to adjust the intake air volume. Legs 1a provided below the main body case 1 are provided with casters 44 and adjusters 42 to facilitate movement and installation. Above the main body case is a blower 46 and a filter 4 for supplying air to the workbench.
8 is stored.

A filter 50 is provided above the blower 46 to purify outside air taken in through the filter 50.

An inspection cover 6 is provided on the front side of the blower 46 and filter 48. A door 42 is slidably provided in the front opening 22 of the workbench 20 and is held by a guide portion 26 . A flat portion 28 is formed around the opening 22, and a stud 30 is implanted in the flat portion 28. The door 24 is provided with a cover 3 that covers the guide section, and the cover 3 is attached to the main body by a line 85 so that it can be opened and closed. Above the door 24, a case 2 containing a built-in illumination light 40 is hinged to a cover 4 with a hinge 5 so as to be openable and closable. The lower corners of the workbench 20 are rounded to prevent contaminants from falling off and to facilitate cleaning. 1. A drain pipe 54 equipped with a drain cock 56 is connected to the workbench 20. An electrical component box is provided above the main body case 1, and an earth leakage breaker 582
Indicator light 60. An alarm buzzer 62 is provided to ensure electrical safety. In the above embodiments, the hinge may be of a removable type so that the covers can be attached and detached.

In the above embodiments, the present invention is applied to a clean workbench with an opening on only one side, but the present invention is not limited to this. may be implemented.

〔Effect of the invention〕

According to the present invention, the flat surface for attaching the sealing cover formed around the opening can be easily exposed, and the workability when attaching the sealing cover can be improved.

[Brief explanation of the drawing]

Figures 1 to 3 show the cleaning workbench according to the first embodiment of the present invention, with the cover open and the cover open, respectively. Fig. 4 is a perspective view of the cleaning workbench according to the second embodiment of the present invention with the cover open, and Figs. 5 to 7 are Perspective views showing the closed state, the transition state to the open state, and the open state of the cover 2 when the lighting cover 2 is provided with the protrusion 2a in the cleaning workbench according to the first or second embodiment of the present invention, respectively;
FIGS. 8 to 10 are the first part of the present invention! F or the closed state of the clean workbench in the second embodiment with a screw-type lid, a hinge-type lid when an opening for checking the inspection cover 6 is provided, and the hinge-type lid in the closed state. FIGS. 11 and 12 are a front view, a side sectional view, a side sectional view, and FIGS. 13 and 14, respectively, showing a partially sectional view of a cleaning workbench according to a third embodiment of the present invention. 1 and 2 are respectively a perspective view of a conventional cleaning workbench and a perspective view of a state in which a sealing cover is attached. 1: Main body case, 3: Cover, 5: Hinge, 20: Workbench, 22: Opening, 24: Door, 26: Guide, 28: Patent attorney Katsutoshi Ogawa, 12.弗 (Fig.
2nd hole 3rd concave $61 8th Figure 9 Figure $ II Figure 12 Figure $13 14th concave

Claims (1)

[Claims] A cleaner comprising a workbench, a main case surrounding the workbench and having an opening on at least one side, and a door slidably provided in the main case to open and close the opening. In the workbench, the opening has a flat surface formed around it, and the door has a cover that covers a guide portion of the door, and the cover is hinged to the main body case so as to be openable and closable. Clean workbench.