JPH0714619Y2 - Clean room outer wall door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an outer wall door of a clean room such as a semiconductor manufacturing factory.

[Conventional technology]

As is well known, a clean room enhances airtightness so as to block invasion of air from the outside. Therefore, the door 1 facing the outer wall also has a tight rubber 3 as a packing material stretched around the door frame 2 side as shown in FIGS. 4 and 5, and a rib with a sharp tip from the door 1 side. -Shaped claw bodies 4 project toward the door frame 2 and close the door 1, the claw bodies 4
Presses against the tight rubber 3 to ensure airtightness.

Further, holes 2a are formed in the upper and lower door frames 2, and tightening bolts 6 and 6'which are vertically projected and retracted by the turning of the handle 5 are provided in the door 1 so that the tightening bolts 6 when the door 1 is closed. , 6'is projected and inserted into the hole 2a, whereby the claw body 4 and the tight rubber 3 are inserted.
It keeps the pressed state with. Reference numeral 7 in the drawing denotes a dead bolt which also appears and disappears when the handle 5 is rotated.

[Problems to be solved by the device]

However, in the door airtight structure shown in FIGS. 4 and 5, no matter how much the airtight performance around the door is improved by the tight rubber 3 etc., the penetration for installing the other handle 5 and the tightening bolts 6 and 6 ' Since there is a ventilation part in the door 1 itself such as a hole,
No complete airtightness was obtained against invisible dust.

It is an object of the present invention to provide an outer wall door for a clean room, which eliminates the inconvenience of the conventional example and can secure the airtightness of the through hole in the door easily and inexpensively.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention arranges a packing material on the door frame side, disposes a claw body that abuts on the packing material around the door, and inserts into the door frame above and below the door and is freely retractable. In a clean room outer wall door with various tightening bolts,
A flange plate is formed on the tightening bolt, and a disk-shaped packing composed of a laminated body is fitted to the tip of the flange plate.Furthermore, a plate-shaped fixing metal fitting is provided around the door opening / closing handle. A disk-shaped packing, which is provided so as to be in contact with the face plate of the door and is formed of a laminated body of thin plates arranged on the outer periphery of the rotating shaft of the handle for opening and closing the door, is housed in the dish-shaped fixing metal fitting. It is what

[Action]

According to the present invention, when the door is closed, the tightening bolt protrudes, and at that time, the disk-shaped packing provided on the tightening bolt is also pushed by the collar plate and abuts on the door frame side. Airtightly seal the gap between the bolt and the hole in the door frame.

In addition, a disk-shaped packing formed of a laminated body of thin plates is housed in the dish-shaped fixing metal fitting of the handle for opening and closing the door, and this packing is sandwiched and pressed by the face plate of the door and the dish-shaped fixing metal fitting. Therefore, the rotating shaft of the handle is airtightly closed to completely prevent dust from entering from this portion.

Further, since any of the disc-shaped packings is composed of a laminated body, deformation and breakage can be reduced and the life can be extended.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a vertical sectional side view showing an embodiment of an outer wall door of a clean room according to the present invention, in which the same constituent elements as those in FIG. 4 showing the conventional example are designated by the same reference numerals.

That is, 1 is a door around which a claw body 4 is vertically projected in two steps, and 3 is a tight rubber stretched on the door frame 2 side.
The door 1 is made by abutting the tip of the tight rubber 3 tightly.
The point that the airtightness is ensured when the door is closed and the point that the door 1 is provided with the tightening bolts that can be retracted and inserted into the holes 2a in the door frame 2 above and below the door 1 are the same as those of the conventional example.

In the present invention, a collar plate 6a is provided so as to project slightly from the tips of the tightening bolts 6, 6 ', and a disk-shaped rubber packing 8 is fitted to the collar plate 6a first. FIG. 2 is a detailed enlarged view thereof, and this rubber packing 8 is formed as a laminated body of thin plates in order to reduce deformation and breakage. Further, as shown in FIG. 3, a disk-shaped rubber packing 9 made by laminating thin rubber sheets is also arranged on the outer periphery of the rotating shaft 5a of the opening / closing handle 5 of the door 1. Located outside the face plate of No. 1, and accommodated in the dish-shaped fixing metal fitting 5b for attaching the handle 5 to the door 1. The plate-like fixing metal fitting 5b is provided around the handle 5, and its edge is brought into contact with the face plate of the door 1 to form a closed container.

In this way, the handle 5 is sealed at its shaft portion with the rubber packing 9, while the door 1 is closed and the handle 5 is rotated to insert the tightening bolts 6, 6'into the holes 2a of the door frame 2, The packing 8 presses against the peripheral edge of the hole 2a and the tightening bolts 6 and 6'and the hole 2a
Close the gap between them.

[Effect of device]

As mentioned above, the outer wall door of the clean room of the present invention is
Not only the engagement between the door and the door frame but also the opening around the door itself seals around the tightening bolts and handle, improving the airtightness compared to the past and preventing invisible dust from entering. It can be shut off almost completely.

In addition, when such a seal is applied, the door itself can be easily set with little processing, and the cost is low.

Further, since the packing is made of a laminated body, it is prevented from being deformed or broken, so that the life is extended and the airtight state is maintained for a long time.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the outer wall door of the clean room of the present invention, FIGS. 2 and 3 are enlarged views of FIG. 1, and FIG. 4 is a vertical sectional side view showing a conventional example. FIG. 5 is a perspective view of the same. 1 ... Door, 2 ... Door frame 2a ... Hole, 3 ... Tight rubber 4 ... Claw body, 5 ... Handle 5a ... Rotating shaft, 5b ... Fixing bracket 6, 6 '... Tightening bolt 6a …… Blank plate, 7 …… Dead bolt 8,9 …… Rubber packing

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Creator Masaaki Shimizu 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Within Kashima Construction Co., Ltd. (72) Creator Shuichi Tanaka 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. within Kashima Construction Co., Ltd. (56) References: Actual development: Sho 56-27292 (JP, U) Actual development: Sho 56-84659 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A packing material is arranged on the door frame side, and a claw body abutting against the packing material is arranged around the door, and a retractable tightening bolt to be inserted into the door frame above and below the door is provided. In the outer wall door of the clean room provided, a collar plate is formed on the tightening bolt, and a disc packing composed of a laminated body is fitted to the tip end of the collar plate. A disk formed by laminating thin plate-like fixing metal fittings so that the edges of the plate-like fixing metal fittings come into contact with the face plate of the door Outer wall door of a clean room, which is characterized by containing a flat packing.