JPS6110952Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inner cover that can be attached from the inside to a glove port of a glove box used in a nuclear facility.

Glove boxes are often used when handling radioactive materials such as plutonium and uranium at nuclear facilities such as nuclear research institutes and nuclear power plants. Such glove boxes come in various sizes and are used depending on the purpose of handling.

A conventional glove box of this type is provided with a transparent plate on the front surface of the glove box so that the inside of the glove box can be viewed from the outside. The transparent plate is provided with a glove port for attaching operating gloves. The proximal end of the glove is airtightly attached to the glove port to prevent leakage of radioactive materials within the glove box.

Furthermore, such conventional glove boxes generally include a plurality of glove ports. When such a glove box is not used for a long period of time, a vinyl bag may be attached to the glove port in place of the glove.

By the way, in such a conventional glove box, if the glove or vinyl bag attached to the glove port is damaged for some reason, radioactive materials will leak from the damaged part.

Therefore, in such a conventional glove box, the inside of the glove box is kept under negative pressure so that even if an accident such as damage to the glove should occur, the effects of the accident can be reduced. However, if the inside of the glove box is always kept under negative pressure, the glove or vinyl bag will always be drawn into the glove box, and this pulling force will cause the glove box, which is usually made of neoprene rubber, etc. Alternatively, physical fatigue may occur in the vinyl bag at an early stage, shortening its lifespan.

In addition, when gloves or vinyl bags are drawn into the glove box, unnecessary loads are applied to the parts that attach to these glove ports and the O-rings that make these parts airtight, reducing the ability to maintain an airtight seal. , there was a problem that the same part could be damaged.

Furthermore, when replacing the glove itself or replacing it with a vinyl bag, the glove port will be completely opened, albeit temporarily.
There was a problem in that the replacement work would be extensive in order to prevent the radioactive materials inside the glove box from leaking.

Therefore, in order to solve the above-mentioned problems, the present inventor developed an inner cover that can be attached to the glove port of a glove box from the inside. However, in the developed inner cover, the elastically deformable ring part provided around the opening of the hollow, almost hemispherical inner cover body is simply fitted into the inner cover of the glove port while being elastically deformed. It's just that. Therefore, when inserting and removing the ring part from the glove port, the ring part slides while being pressed against the inner surface of the opening of the glove port, making the insertion and removal work troublesome, and the ring part It was easy to wear and there was a problem with airtightness.

The present invention was developed in view of these circumstances, and it not only allows for attachment to the glove port from the inside, but also allows for easy insertion and removal, and also allows for easy installation and removal of the glove port from the inside. It is an object of the present invention to provide an inner lid that can reduce wear on parts that are pressed together.

Hereinafter, the present invention will be described in detail with reference to examples.

FIG. 1 is a perspective view showing the entirety of a glove box to which an embodiment of the present invention is applied, and FIG. 2 is a sectional view showing a portion thereof.

In this glove box a, a transparent plate 2 made of acrylic resin or the like is airtightly provided on the front surface of a box body 1 made of stainless steel or the like. Two glove ports 3 are provided on the transparent plate 2 so as to protrude outward. A folded back portion of the base end of the glove 4 is held in the glove port 3 and is airtightly attached using an O-ring 5, a clamp ring 6, and the like. An annular groove 31 (FIG. 3) is provided at a predetermined location on the inner surface of the opening of the glove port 3.

Inside the box body 1, an inner cover is arranged which is attached to the glove port 3 from the inside, as will be explained later. The inner lid includes an inner lid main body 7 and a fixed body 8
1 and a movable body 82. The inner lid main body 7 is made of synthetic rubber such as milled neoprene rubber or synthetic resin with appropriate elasticity and stretchability, and is formed into a hollow, almost hemispherical shape. Ring part 71
(Fig. 3) is an integrally formed structure. The ring portion 71 may have a cylindrical shape. The outer diameter of the ring portion 71 is approximately the same size as the inner diameter of the glove port 3.

The fixed body 81 is formed of a synthetic resin or the like with appropriate rigidity into a hollow, almost hemispherical shape, and has a structure in which a ring portion 84 is attached to the periphery of the opening with screws 86, as shown in FIG. It is becoming.
The ring portion 84 has a substantially semicircular cross section and has an annular groove 83 opened on the outer circumferential side. The fixed body 81 is provided inside the inner lid body 7 with the ring portion 71 of the inner lid body 7 fitted into the annular groove 83 from the outside. That is, the inner lid main body 7 is provided along the outside of the fixed body 81, so that the latter serves as a holder for the former.

The movable body 82 is formed of a synthetic resin or the like with appropriate rigidity into a hollow, almost hemispherical shape, and as shown in FIG. It has a structure in which slits 86' are formed at multiple locations near the periphery. The movable body 82 is moved inside the fixed body 81 with the screw 86 of the fixed body 81 slidably inserted into the slit 86' and with its pressing part 87 in contact with the ring part 71 of the inner cover 7. In FIG. 3, it is provided so as to be movable in the left and right direction.

FIG. 5 is an exploded perspective view showing the relationship between the fixed body 81 and the movable body 82.

A cylindrical body 85 is provided inside the top of the fixed body 81, and two slits 85' are symmetrically provided near the projecting end of the cylindrical body 85. Another cylindrical body 9 is rotatably and slidably inserted into the cylindrical body 85 . Operation levers 91 are symmetrically provided at two predetermined locations on the outer circumference of the cylindrical body 9. The operating lever 91 is slidably passed through a slit 85' of the cylindrical body 85. Cylindrical body 9
A shaft 88 provided outside the top of the movable body 82 is rotatably fitted inside the movable body 82 . Movable body 8
There are multiple circular holes 8 near the top of 2 for passing fingers through.
8' is formed so that the operating lever 91 can be operated from inside the movable body 82.

Next, a case will be described in which the inner cover configured as described above is attached to the glove port 3 from the inside.

In this case, first insert your hand into glove 4,
A finger is inserted through the glove 4 into the circular hole 88' of the movable body 82 of the inner lid disposed inside the box body 1, and this part is grasped. Next, while holding the glove 4, remove the hand from the glove port 3 as appropriate, and as shown in FIG. simply fit into the parts. In this state, the vicinity of the periphery of the opening of the fixed body 81 comes into contact with the periphery of the opening of the glove port 3 via the inner lid main body 7, and the inner lid cannot be pulled out any further. Up to this point, the groove 31 of the ring portion 71 has been explained.
Since the ring part 71 is simply fitted into the opening of the glove port 3, there is almost no wear due to sliding contact between the ring part 71 and the inner surface of the opening of the glove port 3, and the work up to this point is also simple.

Next, use the finger inserted into the glove 4 to press the operating lever 9.
1 to the right in Fig. 3 to form a cylindrical body 8.
After projecting to the outside of the cylindrical body 85, it is rotated approximately 90 degrees and is engaged with the protruding end surface of the cylindrical body 85. Then, the movable body 8
2 moves rightward in FIG. 3, and its pressing portion 87 presses the ring portion 71 of the inner lid main body 7, as shown in FIG. As a result, the ring portion 7
1 is appropriately elastically deformed, and a portion thereof enters the groove 31 of the glove port 3 and comes into pressure contact with the wall surface thereof. The reason why the operating lever 9 is locked to the protruding end surface of the cylindrical body 85 is to prevent the pressing part 87 from returning due to the elastic force of the elastically deformed ring part 71. Thus, the inner lid is the glove port 3
is attached to the inside of the

In this installed state, the ring portion 71 is connected to the groove 31.
Since the ring part 71 comes into pressure contact with the wall surface of the box, sufficient airtightness can be obtained in this part, and even if the inside of the box body 1 is under negative pressure, the ring part 71 will not slip out from the groove 31. . In the existing glove box, the groove 31 is not provided on the inner surface of the opening of the glove port 3, but even in such a case, the ring portion 71 is elastically deformed and comes into pressure contact with the inner surface of the opening of the glove port. This provides airtightness and prevents the ring portion 71 from slipping out.

When removing the inner cover, rotate the operating lever 9 approximately 90 degrees with your finger inserted into the glove 4, and then insert it into the slit 85' of the cylindrical body 85. As a result, the movable body 82 returns to its original state and comes out of the groove 31, and accordingly, the movable body 82 is pushed leftward in FIG. 4 and returns to its original state. The removed inner lid is box body 1
It will simply be placed at an appropriate location within.

As explained above, according to the present invention, the inner cover can be airtightly attached to the glove port, so even if the glove or the like is damaged, sufficient airtightness can be obtained, and safety is improved. Further, when the inner cover is attached to the glove port, no pulling force is applied to the glove etc. even if the inside of the glove box is under negative pressure, so the durability of the glove etc. is improved. In addition, when the inner cover is attached to the glove port, sufficient airtightness can be obtained at the inner cover, making it extremely easy to replace the glove itself or replace it with a vinyl bag in a safe manner. Can be done. Furthermore, after the inner cover is simply fitted into the glove port, the movable body is moved so that the ring portion is brought into pressure contact with the inner surface of the opening of the glove port, making insertion and removal work into and out of the glove port extremely easy. The ring part is less likely to wear out, further improving the durability of the inner lid.

[Brief explanation of the drawing]

1 to 5 are shown to explain one embodiment of the present invention, of which FIG. 1 is a perspective view showing the entire glove box, FIG. 2 is a sectional view showing a part thereof, Figure 3 is a cross-sectional view showing the state just before the inner cover is completely attached to the glove port, Figure 4 is a cross-sectional view showing the inner cover completely attached to the glove port, and Figure 5 is a fixed body and movable body. FIG. 2 is an exploded perspective view showing the relationship with the body. DESCRIPTION OF SYMBOLS 1... Box body, 2... Transparent plate, 3... Globe port, 31... Annular groove, 4... Globe, 7... Inner lid main body, 71... Ring portion, 81...
... fixed body, 82 ... movable body, 83 ... annular groove,
87...Press portion, 9...Operation lever.

Claims (1)

[Scope of utility model registration request] The inner lid body is hollow and has an almost hemispherical shape and has an elastically deformable ring part around its opening, and the ring part is removably fitted into the glove port of the glove box from the inside; a fixed body provided inside the inner lid body with a ring portion of the inner lid body fitted into the annular groove from the outside; and a ring of the inner lid body. The ring part of the inner lid main body is provided with a pressing part for pressing the ring part of the inner lid main body, and the ring part of the inner lid main body is inserted into the fixed body perpendicularly to the opening surface thereof. A movable body provided to be able to reciprocate in the direction and a ring portion of the inner lid main body are fitted into the glove port, and then the movable body is moved toward the outside of the glove port so that its pressing portion A glove comprising: a mechanism for maintaining this state when the ring portion of the inner lid main body is brought into pressure contact with the ring portion, whereby the ring portion is elastically deformed and comes into pressure contact with the inner surface of the opening of the glove port. Inner cover attached to the port.