JPH04105099A - Isolated access mechanism - Google Patents

Abstract

PURPOSE:To allow efficient entry to and retreat from a contaminated area without any need of a spare room for access by enabling a coupled section between a part of an airline suit and the side wall of a contaminated room to be opened or closed in a sealed state. CONSTITUTION:An airline suit 16 to be put on for working in a contaminated area is fitted with a lid frame 12 and a lid 13, while a lid frame 10 is fitted to a wall 15 separating the contaminated area from a non-contaminated area and a lid 11 is fitted thereto. The suit 16 and the wall 15 are coupled to each other with an operation handle 1, gears 2 and 3, and screws 4 to 8. A worker can enter or leave the suit 16 via the access opening 50 thereof by opening or closing the coupled lids 13 and 11. In this case, a packing 14 is used for maintaining airtightness at the time of opening or closing the lids 13 and 11. In opening the contaminated area, the frames 12 and 10 are coupled to each other, and the lids 13 and 11 to be demounted become faced to each other at a contaminated portion, thereby forming a sealed section 30. The spread of contamination, therefore, can be prevented. According to the aforesaid construction, direct access to the suit 16 can be made without any need of a less contaminated room via the installation of a coupling and releasing means.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an isolated entrance mechanism to a specific atmosphere chamber, and more particularly to an entrance/exit mechanism for entering and exiting a suit worn in a contaminated area of a nuclear-related facility or the like.

[Prior Art] Particular care is taken when entering and exiting contaminated areas at nuclear facilities and the like. When entering the room, an airline suit is worn, and when leaving the room, one or three rooms with low contamination levels are set up, where the contamination level is gradually lowered and the contamination level is measured to ensure that the contamination is removed. After confirming that everything has been completed, leave the room. This is the method used to enter and exit the contaminated room when fishing on a boat, but it is especially important to prevent the spread of contamination by exiting.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, it is necessary to provide one to three rooms with a low contamination level when leaving the room, so it is necessary to secure a large space accordingly. Although the contamination level is low, some rooms require contamination control similar to contaminated areas.

In addition, there are cases where contamination is being removed in rooms with low contamination levels and measurements are being taken to confirm the decontamination.
In particular, there is a problem in that it takes a lot of time to leave the room. This also leads to a decrease in the efficiency of work that requires repeated entry and exit from the isolation room.

There is also the problem that each time a worker leaves the facility, the amount of contaminated work clothes removed or disposable materials, ie, contaminated waste, increases.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide an isolated entry/exit mechanism that does not require a preliminary chamber for entering/exiting a contaminated area and can perform a large and efficient exit.

[Means for Solving the Problems] In order to solve the above problems, the present invention connects an airline suit worn in a contaminated area to the side wall of a contaminated room, and by opening and closing the connecting mechanism, a worker can The reason is that it allows direct access to and from the line suit. That is, a part of the airline suit and a part of the isolation wall of the contamination chamber are connected, and an opening/closing mechanism is provided for the joint, thereby preventing the spread of contamination and facilitating the entry and exit of workers.

[Operation: A part of the worker's airline suit is connected to the side wall of the contaminated room, and the joint is made into a mechanism that can be opened and closed in a sealed state, so that the worker can directly enter the airline suit in the open state I can do it.

The part of the airline suit that connects the opening and closing parts is sealed, so there is no chance of contamination spreading.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1(A) to 1(E) show embodiments of the present invention. In Figure 1 (a), 16 is an airline suit, which is worn when working in a contaminated area. 12 is a lid frame provided on the airline suit 16, and 13 is a lid attached to it. 15
is a wall that separates a contaminated area from a non-contaminated area with a side wall.
It is composed of a lid frame 10 and a lid 11 attached to it. This Mll and the former lid frame 12 are provided with two screw holes each at about four corresponding positions. (Details described later). 2 is a gear that is integrated with the operating handle. 3 is a gear that meshes with gear 2 and rotates in the opposite direction. 14 is a gasket used to maintain airtightness when opening and closing the lid. FIG. 1(A) shows a schematic diagram of a part of the airline suit and a side wall part connected thereto. 20 is an airline hose. These bonding processes are shown in FIGS. 1(b) to (d). Figure 1 (b) shows the initial state of the bond, and Figure 1 (c)
In this state, the steering wheel operation has progressed to a certain extent and gears 2 and 3 are overlapping each other. FIG. 1(d) shows a case where the steering wheel operation has further progressed.

FIG. 1(E) shows the joint part, that is, the lid part 13 of the airline suit and the lid part 11 on the side wall side,
Shown removed. The -50 doorway allows workers to enter the airline suit from the uncontaminated area, and also to exit directly from the airline suit to the uncontaminated area. In FIG. 1 (E), 4 and 5 are connected with screws using a wrench 6. 7.8.9 are screws as well. These are connected to a gear 2.3, and a handle 1 is provided on one of the two sides.

When the handle 1 is turned to the right, the gear 2 and the screw 4.5 also rotate to the right, and in the case of a right-hand screw, they move toward the left in the figure.

On the other hand, the screw 7.8 connected to the gear 3 rotates to the left, and in the case of a right-handed screw, moves to the right in the figure. The details of these movements will be described later, but the present invention allows the coupling and release of the four elements by rotating the screws 4.5 and 7.8 by manipulating the handle l in this manner. This is what we do. This combination and release will be described below.

FIGS. 2(a) to 2(c) are overall views of this joint portion.

Figure 2 (C) shows this joint from the inside, and Figure 2 (C) shows this joint from the inside.
B) is a front view seen from the outside, and (B) is a cross-sectional view. The operation of the coupling mechanism will be explained using FIG. 2(A). 1
are connected by the handle, and released by the handle. 10 is a lid frame fixed to the wall of the chamber in the contaminated area.

Contaminated parts of the lids 13 and 11 face each other and form a closed space 30.
contamination will not spread. Note that this joint does not have to be circular (it does not need to be circular), as long as it allows the operator to enter and exit.

FIGS. 3 and 4 are partially enlarged views of this coupling mechanism. The screws 5 and 8 are fitted into the lid frame 10 and the space N13 of the airline suit.

In the manufacturing process, the screws 5 and 8 are inserted into this space and then a presser 17 is screwed in. If the screw is a right-handed screw, if the screw continues to be rotated clockwise, the screw head 18 will press against the space wall 19. Conversely, if the screw head 18 continues to rotate counterclockwise, the screw head 18 will press against the presser 17. Note that FIG. 4 is an enlarged view of part (a) in FIG. 3. As is clear from the above configuration, if the screws 4 and 5 are continued to be rotated clockwise, lO and 12 will be connected, and at the same time, 7 and 8 will be rotated counterclockwise to connect 11 and 13. Also, at this time, 8 and the lid frame 12 are separated, and at the same time, 5 and the lid 11 are separated.
are released, and 4 and 5 are separated by the wrench portion 6.

Conversely, if you continue to rotate 4 and 5 to the left, IO and 11 will be combined,
At the same time, 7.8 rotates clockwise, and 12 and 13 are combined. Also, at this time, 5 and 12.8 and 11 are separated.

(A) to (C) in FIGS. 5 and 6 show the screw portions.

5 shows the screws 4 and 7, and FIG. 6 shows the screws 5 and 8. This screw has a screw head in the center and threads on both sides, which is a distinctive feature of this mechanism.

Further, both of them are rotated together by wrenches 6.6' and 9.9'.

The mechanical part of the present invention has been explained in detail above, and the present invention works by wearing an airline suit as shown on the left side of Fig. 1 (A). The purpose is to create a state similar to that shown in Figure 1 (e) so that workers can enter and exit.

[Effects of the Invention] According to the present invention, workers can directly enter and exit the airline suit from a non-contaminated area without spreading contamination. It also has the effect of eliminating the need for a low-contamination area room.

[Brief explanation of the drawing]

Figures 1 (a) to (e) show examples of the present invention, Figures 2 (a) to (c) show an overall view of the coupling mechanism, and Figures 3 and 4 show enlarged views of the coupling mechanism. , FIGS. 5 and 6 (A) to (C) are explanatory diagrams of the screw portion, respectively.

Claims (3)

[Claims] (1) In a device that enters and exits a work suit in a contaminated area, a means for connecting and releasing a part of the work suit and a part of the side wall between the contaminated area and the non-contaminated area is provided, and the connecting part is removed. An isolation entry/exit mechanism characterized in that access is made from the non-contaminated area to the work suit in the contaminated area via the uncontaminated area. (2) In the claim 1, the joint portion of the suit is composed of a lid frame portion and a lid portion, the joint portion of the side wall portion is also comprised of a lid frame portion and a lid portion, and An isolation entry/exit mechanism comprising a means for sealingly coupling and releasing both lid frame parts and a sealingly coupling and releasing means for both lids. (3) The hermetic coupling and release means as set forth in claim 2 includes a drive means for driving the hermetic coupling and release means, and a screw head driven by the drive means and located at the front and rear of the screw. a screw having threaded portions on both ends; a first means for coupling and releasing the two lid frame portions by rotating the screw; and a first means for coupling and releasing the two lid frame portions by rotating the screw in a direction opposite to the rotation of the first screw. and a second means for coupling and uncoupling the two lid parts, and the isolation entry/exit mechanism is characterized in that the first means and the second means are coupled and disengaged in parallel by operating the drive means. .