JPS643112Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a protective ring for 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.

1 to 3 show an example of such a conventional glove box.

In this glove box a, a transparent front plate 2 made of acrylic resin or the like is installed on the front surface of the glove box body 1 made of stainless steel or the like in order to allow the inside to be seen from the outside. It is set in. A flange of a globe port 3 having an outward flange at the proximal end of a cylindrical body is airtightly attached to the opening of the front plate 2 . is prominent. The outer circumferential surface of the cylindrical body of the glove port 3 is covered with a portion folded back on the outside of the proximal end of the glove 4 inserted into the front plate 2 through the inside of the cylindrical body of the glove port 3. , an O-ring 5 and a band-shaped clamp ring 6. The O-ring 5 is positioned by being fitted into an annular groove 31 formed on the outer peripheral surface of the cylindrical body of the glove port 3. Clamp ring 6
is adapted to be tightened by a clamp 61.

By the way, in such a conventional glove box, since the folded part of the glove 4 is exposed, the physical properties of this part tend to deteriorate due to outside air or aeration. When the atmosphere is susceptible to the influence of sea breeze, the physical properties deteriorate significantly and the life of the globe 4 is shortened.

In addition, if a hard object such as a stepladder or a trolley comes into contact with the folded part of the glove 4 at the protruding end of the cylindrical body of the glove port 3, this part may be damaged and radioactive materials may leak from this damaged part. There was a problem that there was.

Further, when the worker puts his/her hand into the glove 4 and performs work, the glove 4 is often pulled toward the inside of the front plate 2, and in such a case, the O-ring 5 is particularly pulled. When the glove is stretched and floats up, a gap is created between the glove 4 and the glove port 3 at this lifted part, and radioactive substances may enter this gap and accumulate there. As a result, when a new glove is put on while inserting an old glove into the glove box body 1 in order to replace the glove 4, there is a problem in that radioactive substances accumulated in the gap leak out.

The present invention was developed in view of these circumstances, and is a protection for gloves for glove boxing that can protect the folded part of the glove and also prevent the O-ring from lifting up even if it is pulled. The purpose is to provide rings.

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

4 and 5 show a portion of a glove box to which an embodiment of the present invention is applied. In these figures, the same parts as in FIGS. 2 and 3 are denoted by the same reference numerals, and the explanation thereof will be omitted as appropriate.

This glove box uses glove port 3.
A protection ring 7 is attached to the cylindrical body portion. The protective ring 7 is made of a material with appropriate elasticity and excellent weather resistance, such as neoprene rubber, and has an inward flange 7 at the tip of the cylindrical body.
1. FIGS. 6 and 7 show examples of the protective ring 7, in which an annular groove 72 for accommodating the O-ring 5 is formed inside the cylindrical body. An accommodating portion 73 consisting of a rectangular hole, a notch hole, a recessed portion, etc., for accommodating the clamp 61 of the clamp ring 6 is formed on the outside of the clamp ring 6 . The thickness of the protective ring 7 is set to a thickness (for example, about 10 mm) that can sufficiently block outside air and withstand a certain degree of mechanical impact.

The cylindrical body of the protective ring 7 is brought into close contact with the outer circumferential surface of the folded portion of the glove 4 on the outer circumferential surface of the cylindrical body of the glove port 3, and the inwardly directed flange 71
is in close contact with the folded portion of the glove 4 at the protruding end of the cylindrical body of the glove port 3.

The size of the hole 74 formed by the inward flange 71 of the protective ring 7 is approximately the same as the inner diameter of the globe 4 corresponding to this portion, and the diameter of the hole 74 at the protruding end of the cylindrical body of the globe port 3 is approximately the same as the inner diameter of the globe 4 corresponding to this portion. It is designed so that it can sufficiently cover the folded part of the case, and it does not get in the way of the worker's hands being put in and taken out.

In this glove box, since the folded portion of the glove 4 is hermetically covered by the protective ring 7, deterioration of the physical properties of this portion due to outside air, aeration, etc. is suppressed.

Furthermore, since the folded part of the glove 4 at the protruding end of the cylindrical body of the glove port 3 is covered by the inward flange 71 of the protective ring 7, hard objects such as a stepladder or a trolley may come into contact with this part. However, this part will not be damaged.

Furthermore, since the O-ring 5 is pressed down by the cylindrical body of the protective ring 7, even if the glove 4 is pulled toward the inside of the front plate 2 during work, the O-ring 5 will not be lifted up. There isn't.

As explained above, according to the present invention, since the folded part of the glove can be airtightly covered with a protective ring, deterioration of the physical properties of the folded part of the glove can be suppressed, and the durability of the glove can be improved. In addition, since the folded part of the glove at the protruding end of the glove port's cylindrical body can be covered by the inward flange of the protective ring, even if a hard object such as a stepladder or a trolley comes into contact with this part, this part will be protected. The cylindrical shape of the glove port improves safety by preventing the O-ring from being damaged, and also prevents the O-ring from lifting up even when it is pulled, improving safety when changing gloves. Not only can the folded portion of the glove at the protruding end of the body be sufficiently covered, but it can also be prevented from interfering with the worker's ability to put his/her hand in and take it out.

[Brief explanation of the drawing]

Fig. 1 is an external view schematically showing an example of a conventional glove box, Fig. 2 is a longitudinal side view showing a part of this conventional glove box, and Fig. 3 is taken along line A-A in Fig. 2. 4 is a vertical sectional side view showing a part of a glove box to which an embodiment of the present invention is applied; FIG. 5 is a vertical sectional front view taken along line B-B in FIG. 4; FIG. FIG. 8 is a perspective view showing each example of the protection ring. 2... Front plate, 3... Globe port, 4...
Glove, 5... O-ring, 6... Clamp ring, 7... Protective ring, 71... Flange, 7
4...hole.

Claims (1)

[Scope of utility model registration request] Attach the proximal end of the glove port having a cylindrical body to the opening of the front plate of the glove box,
The cylindrical body of the glove port is made to protrude outside the front plate, and the proximal end of the glove inserted into the front plate through the inside of the cylindrical body of the glove port is folded back to the outside. A cylindrical body that is attached to the outer circumferential surface of the glove port, the cylindrical body being brought into close contact with the outer circumferential surface of the folded part of the glove on the outer circumferential surface of the cylindrical body of the glove port, and the tip of this cylindrical body. and an inward flange formed in the cylindrical body of the glove port to closely cover the folded part of the glove at the protruding end of the cylindrical body of the glove port. A protective ring for a glove box for a glove box, which is integrally formed and characterized in that the size of the hole formed in the inward flange is approximately the same size as the inner diameter of the glove corresponding to this part.