JP2570105B2 - Door seal structure of closed room - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door seal structure for a closed room such as a refrigerator room and a clean room.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view showing an example of a conventional door seal structure for a closed chamber. Conventionally, a door seal structure in this type of closed chamber is disclosed in, for example, Japanese Patent Application Laid-Open No. 57-868.
No. 3 discloses this. This door seal structure is applied to a container, and as shown in FIG.
This is a structure including a seal 11 with rich cushioning properties between a door body 10 and a door frame 12 supported by a hinge.

Further, a projection is formed on the periphery of the door main body 10, and a lock mechanism is provided so that the door main body 10 is rotated by the hinge with the hinge as a fulcrum, and the projection is pushed into the seal 11 to be airtightly closed. ing. Further, the lower door frame 12 has a foot portion 13 for fixing the seal 11, and the foot portion 13 has an inclined surface so as to be flush with one side of the opening from the chamber wall.

[0004] A reinforced plastic film is provided on the inclined surface so as not to be worn by repeated carrying in / out of articles.

[0005]

In the above-described door seal structure, the door body is pressed against the door frame by the lock mechanism, and the protrusion is pressed into the flexible seal to maintain airtightness, but input is applied to operate the lock mechanism. There is a need. Therefore, there is a problem whether the input for activating the lock mechanism is insufficient or the lock mechanism is forgotten to be locked, and whether the lock mechanism is completely closed in an airtight manner. Further, since the frame portion protrudes from the chamber wall to fix the seal, the effective opening for carrying in / out is narrowed, and the size of articles carried in / out of the opening is limited. Further, there is a problem that the article is damaged in the sealing portion when the article is carried in and carried out, so that airtightness cannot be maintained.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a door which can be completely closed airtightly without requiring a force for locking a door, and has a larger carry-in / out opening area. It is an object of the present invention to provide a door seal structure of a closed chamber which is not damaged.

[0007]

SUMMARY OF THE INVENTION A feature of the present invention is that a door frame having an opening having the same size as an opening formed by an indoor wall,
A door body having a size large enough to enter the opening of the door frame, and a sealing member on the tube provided on the door frame and expanding the outer skin by air pressure to eliminate a gap between the door body and the door body. And the door
Covering the seal member in conjunction with the opening operation of the main body
A seal having an upper surface that is flush with the surface of the lower indoor wall
It is a door seal structure of a closed room including a protection plate .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIGS. 1 (a) and 1 (b) are a front view and an AA cross-sectional view of a door seal structure of a closed chamber showing an embodiment of the present invention. This door seal structure is applied to a clean room, is embedded in a wall surface, and has a tubular seal 2 between a pair of frame members of the door frame 9.

When the opening of the door frame 9 is closed by the door main body 1, compressed air is supplied to the seal 2 which is relaxed and is recessed from the inner frame surface of the door frame 9 to expand the seal 2 so that the seal 2 is expanded. Protrude from the frame surface. As a result, the protrusion of the door main body 1 in the inner frame portion is wrapped by the seal 2, and the door main body 1 closes the opening of the door frame 9 in an airtight manner. The supply valve 3 is a valve for opening and closing a pipe for supplying compressed air, and the exhaust valve 4 is a valve for discharging compressed air from the seal 2.

Further, since this door seal structure is applied to a clean room having a large volume, the seal 2 itself becomes large. Therefore, when the door body 1 is opened and an article is conveyed, the seal 2 is provided with a seal protection plate 5 on which the seal 2 is placed and a rotatable shaft is attached at one end so that the article does not directly contact the seal 2. It is not always necessary to attach a small-sized container such as an in-vehicle container because the space between the pair of frame members is narrow.

FIG. 2 is a partial sectional view of the door seal structure showing a state where the door body of FIG. 1 is opened. next,
The opening and closing operation of the door body will be described with reference to FIGS. As described above, the state of FIG.
Is opened and the exhaust valve 4 is closed, so that the seal 2 expands and presses against the projection of the door main body 1, and the door main body 1 hermetically closes the opening. Accordingly, one end of the seal protection plate 5 is also lifted in a rotatable direction.

Next, the supply valve 3 is closed, and the exhaust valve 4 is closed.
When the door body 1 is opened, the compressed air in the seal 2 is exhausted from the exhaust valve 4 and the seal 2 is relaxed and fits between the pair of frame members as shown in FIG. Accordingly, the seal protection plate 5 falls down in a rotatable direction, and the protection plate 5 becomes flush with the inner frame surface to completely cover the seal 2. As a result, the cart loaded with the articles can pass over without damaging the seal 2.

FIG. 3 is a partial cross-sectional view of a door seal structure of a closed chamber showing another embodiment of the present invention. In this door seal structure, as shown in FIG. 3, a cushioning material 6 is provided on the rear side of the projection of the door main body 1. This cushioning material makes the door body larger, and the door body 1 seals 2
To prevent excessive pressure from being applied. This cushioning material 6
, The life of the seal 2 is extended.

[0015]

As described above, according to the present invention, a door frame having an opening without an indoor wall surface, a door body having a size enough to enter the opening, and a gap between the door frame and the door body being inflated by air pressure. By providing a tubular sealing member to be filled in the door frame and simply supplying compressed air to the sealing member, the sealing member can be completely airtightly closed. In addition, by adopting a door frame having the same inner frame surface as the indoor wall, articles can be easily carried in and out as long as they can be accommodated in the room. Further, by providing a seal protection plate that covers the seal member in conjunction with the opening of the door body and becomes flush with the inner frame surface of the door frame, articles can be carried in and out without damaging the seal member. There is also an effect that can be done.

[Brief description of the drawings]

FIG. 1 is a front view and an AA cross-sectional view of a door seal structure of a closed chamber showing an embodiment of the present invention.

FIG. 2 is a partial sectional view showing a state where the door body of FIG. 1 is opened.

FIG. 3 is a partial cross-sectional view of a door seal structure of a closed chamber showing another embodiment of the present invention.

FIG. 4 is a sectional view of a door seal structure of a closed chamber showing an example of the related art.

[Explanation of symbols]

 1,10 Door body 2,11 Seal 3 Air supply valve 4 Exhaust valve 5 Seal protection plate 6 Buffer material 9,12 Door frame 13 Foot part

Claims (1)

(57) [Claims] 1. A door frame having an opening having the same size as an opening formed by an indoor wall, a door body having a size large enough to enter the opening of the door frame, and a door frame provided on the door frame. A seal member on the tube for expanding the outer skin by air pressure to eliminate a gap between the door body and the door body, and the sealing member in conjunction with the opening operation of the door body.
And the same surface as the surface of the lower indoor wall.
And a seal protective plate having an upper surface .