JPS63118450A - Upstairs chamber for clean room - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a staircase for a clean room.

[Conventional technology]

When a clean room is divided into upper and lower floors, a staircase is naturally formed outside the clean room, and this staircase is used for coming and going between the clean rooms. In order to allow workers to pass through the stairway without having to take another air shower or take off and put on clean clothes, the stairway itself is kept at a certain level of cleanliness.

The method is to introduce excess air from the conventional clean room into the stairwell, and to make the stairway less obstructed, the stairway is designed as a bare stairway with no sillboards, and the treads are fitted with gratings in the vertical direction. I tried to get as much air through as possible.

[Problem that the invention seeks to solve]

Such conventional staircases are designed to prevent dust from accumulating as much as possible, and are not reliable enough to be actively used as clean rooms.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the disadvantages of the conventional example and to provide a staircase for a clean room that can be made into a completely clean room by simply adding a simple structure.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention uses a box-stair type staircase in which a watermark board is used for the tread and a board is attached to the back side, and an air supply port is secured at the landing, and the staircase is The main feature is that air inlets communicating with the air return duct are provided at appropriate intervals.

[Effect]

According to the present invention, the air supplied to the landing flows downward because the stairwell extends in the vertical direction, and at this time, since the back side of the stairs is shielded, the air flows along the stairs. Then, the air is sucked into the return duct from the side air intake port, and although the lumps pass through the treadle board, they do not fall directly to the bottom, but are drawn into the return duct from the air intake port as appropriate. will be collected and will not partially accumulate in the stairwell.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

First, the entire staircase room will be explained with reference to Figures 3 to 5. In the figure, 1 is a supply duct that passes through the upper and lower sides and rises up to supply air from an air conditioner (not shown) located underground etc. to each clean room. supply. In addition, 2 is a return duct that collects return air from the clean room, which also passes upward and downward.

The staircase chamber is constructed by attaching a staircase 3 around the return duct 2, and a landing 4 is provided with a supply port 5 for air from the supply duct 1.

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In the figure, 7 is a door for access to the clean room, and 8 is a door for access to a location outside the clean room.

Note that the air supply port 5 may not be formed directly in the supply duct 1, but may be provided in communication with the clean room so as to obtain air from within the clean room.

As shown in FIGS. 1 and 2, the round staircase 3 is a box staircase type in which the treads 9 are made of breeches, and the side beams 10 are covered with a steel plate 11 on the back side. shall be. Further, inlet ports 12 communicating with the return duct 2 were formed at appropriate intervals in the sidewall lO on the return duct 2 side.

Next, to explain the usage and operation, the air blown from the supply port 5 to the landing 4 passes through the tread 9 of the stair 3, but since the lower part thereof is blocked by the steel plate 11, it continues along the stair 3. The air then descends and is sucked into the return duct 2 through the intake port 12.

In this way, air flows along the slope of the stairs 3 in the stairwell and is sucked into the return duct 2 at appropriate intervals, so even if dust falls onto the stairs 3 from workers etc. It is stored in the return duct 2 without falling directly to the bottom.

〔Effect of the invention〕

As described above, in the clean room stairwell of the present invention, air flows along the stairs and is absorbed into the return duct in the stairway formed outside the clean room, so that the stairway itself is similar to a clean room. This eliminates the trouble of having to put on and take off the clean clothes again when going between clean rooms through the stairs.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of the main part showing one embodiment of the clean room staircase of the present invention, FIG. 2 is a longitudinal sectional front view of the same part,
FIG. 3 is a longitudinal sectional side view of the entire building, FIG. 4 is a plan view of the second floor portion of the same as above, and FIG. 5 is a plan view of the third floor portion of same as above.

Claims (1)

[Claims] The stairs are designed in the form of a box staircase with watermarks for the treads and a board pasted on the back, and an air supply port is secured at the landing, as well as an air intake connected to the air return duct at the side girth of the stairs. A staircase chamber for a clean room characterized by openings provided at appropriate intervals.