JPH067909Y2 - Airtight door for transfer port between airtight boxes - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to improvement of an airtight door provided at a transfer port portion between airtight boxes used in a nuclear facility, a medical facility, a bio facility and the like.

(B) Conventional technology Taking conventional airtight doors used in nuclear facilities as an example, it is the first equipment for analyzing and measuring solutions, powders, and solidified bodies containing α nuclides and various tests. An airtight box as shown in FIGS. 5 and 6 is used. The first airtight box (15) has a transfer port (11) for transferring articles to and from the second airtight box (16). At the end of the transfer port (11), there is a lid (20) as shown in FIGS. 7 and 8,
Tighten this with the tightening bolt (22). An O-ring (21) is provided in a groove at the end of the transfer port, and the O-ring (21) is pressed by a lid to keep airtightness. In this structure, a large number of bolts (22) were operated to open and close the lid (20).

(C) Problems to be solved by the invention In the above-mentioned conventional technology, the glove port (17) is put in the hand,
There is a problem that it is difficult to attach and detach the lid by tightening or loosening the tightening bolts (22) through the globe. The present invention aims to solve the difficulties of operating a large number of bolts and attaching and detaching a heavy lid.

(D) Means for solving the problem A structure that consists of a door and a support, and the door is provided with a packing between a round holding plate and a round lid, and this can be tightened with a screw rod and a cap nut. The support is fixed to the airtight box,
The door is configured to be supported by the support tool via the pin.

(E) Action By sliding the pin along the guide groove of the support, the door can move parallel to the transfer port. Insert the door into the transfer port, turn the handle, and tighten the lid and holding plate with the cap nut to compress the air inside.
The packing is pressed against the inner surface of the transfer port by the action of the inclined portions of the lid and the pressing plate. This completely separates the airtight box from the transfer port. When the handle is turned in the loosening direction, the space between the lid and the holding plate expands, and the outer circumference of the packing moves away from the inner surface of the transfer port. The door can be moved out of the transfer port along the guide groove, and the article can be moved from the first airtight box to the second airtight box.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an airtight door considered in this case. The door body (1) is a lid (3) and a holding plate
The packing (9) can be tightened between the (8) with the screw rod (7) and the cap nut (4), and with the hinge (18) through the pin (12),
It is a structure that can be supported by a support tool (2). The lid (3) has a dish-shaped recess in the middle of the circle, and has a hole through which the screw rod (7) passes. The hinge (18) is fixed to the lid (3), the pin (12) is fixed to the hinge (18), and the pin (12) is slidable along the guide groove (14) of the support (2). ) Is located in the round hole (19), it is attached so as to be rotatable around the pin. To rotate around the pin, the pin (12) is a round hole (1
When it is in position 9). When the cap nut (4) is tightened, the packing (9) is transferred to the transfer port (11) by the pressure of the gas inside and also by the inclined part (23) provided on the lid (3) and the retainer plate (8).
Press on the inner surface. The packing (9) is an annular elastic body having a special groove shape in cross section, and is made of, for example, synthetic rubber. The circular retainer plate (8) has a diameter slightly smaller than the inner diameter of the transfer port (11), and has a dish-shaped recess in the middle symmetrical with the lid (3), and the screw rod (7) is fixed in the center. ing. Packing (9)
The first part is pressed against the holding plate with the stop plate (10), and is fixed so as not to move from the holding plate. The cap nut (4) is provided with a groove for the O-ring on the side in contact with the lid, and the O-ring (6) is inserted there to prevent the gas between the lid (3) and the holding plate (8) from leaking. The handle nut (4) is fixed to the cap nut (4) so that the cap nut (4) can be easily rotated. Pin (12) is support (12)
The part that slides in the guide groove (14), that is, the sliding surface (13)
As shown in the figure, the chamfers are chamfered so that the pins can easily move in the guide groove (14). Since the sliding surface (13) has two chamfers, the lid can be detached from the transfer port without rotating during the sliding. In addition, since a round hole (19) is provided at the end of the guide groove, when the pin (12) moves to the end, the door becomes rotatable and the articles in the transfer port (11) move. Will be easier.

(G) Effect of the Invention According to the airtight door of the present invention, in order to remove the door body in the airtight box, the handle is operated to rotate the cap nut and slide the pin to move the lid body. It can be done easily and quickly. Therefore, it is not necessary to attach and detach a large number of screws as in the conventional case. Further, since each of the two chamfered portions of the pin slides in the guide groove of the support, the door body also moves in parallel during movement, and it is not necessary to support the heavy door body by hand.

[Brief description of drawings]

FIG. 1 is a sectional view of an airtight door. FIG. 2 is an AA view of FIG. FIG. 3 is an enlarged view of the pin. FIG. 4 is a sectional view taken along line BB of FIG. FIG. 5 is a front view of the first and first airtight boxes. FIG. 6 is the plane of FIG. FIG. 7 is a sectional view showing a conventional airtight structure. FIG. 8 is a C-C view of FIG. 7. DESCRIPTION OF SYMBOLS 1 ... Door body, 2 ... Support tool, 3 ... Lid, 4 ... Cap nut, 7 ... Screw rod, 8 ... Holding plate, 9 ... Packing, 12 ... Stop plate, 14
… Transport port

Claims (1)

[Scope of utility model registration request] 1. A door body and a support, wherein the door has a structure in which a packing is provided between a round pressing plate and a round lid, and the packing can be tightened with a screw rod and a cap nut. An airtight door for an airtight transfer port between airtight boxes, which is fixed to a box and is provided with a guide groove in which a pin is slidable so that the door body is supported by a support tool via the pin.