JPS6326880B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure for attaching a glove to a shielding box.

More specifically, in the present invention, a fixed port is fixed to the wall of the shielding box, and the tip of the base of the glove is attached to the outer periphery of the fixed port with a sealing tightening band and an O.
The glove mounting part in a shielding box is fixed with a ring, and the glove mounting part in a shielding box is constructed by fixing the intermediate part of the base of the glove which is placed in a free state in a fixed port with a special stopper ring. It's about structure.

[Conventional technology]

Generally, work with ionizing radioactive substances (hereinafter referred to as "shielding materials") that are dangerous to the human body is carried out in a shielding box.

FIG. 1 shows a working condition in which the shielding material in the shielding box 1 is manipulated using the gloves 3.
In FIG. 1, a shielding box 1 is made of a transparent material, and its interior is sealed from the outside. A cylindrical fixed port (not shown) is fixed to the wall 2 of the shielding box 1, and the base of the glove 3 is fixed to the outer periphery of the fixed port. It is extending.

FIG. 2 shows an enlarged view of the main part of FIG. 1.

As can be seen from FIG. 2, a through hole is provided in the wall 2, and a cylindrical fixing port 6 is fixed to this through hole via a ring-shaped packing 8, a plate-shaped ring 7, and a bolt 9.

The base 31 of the globe 3 is attached to the outer periphery of the fixed port 6.
The distal end portion of is fixed by a sealing tightening band 10 and an O-ring 11.

Now, since the glove 3 deteriorates with repeated use, it is necessary to replace it periodically. In this replacement work, it is required that dangerous shielding substances are not leaked to the outside of the shielding box 1.

A conventional method of replacing the glove 3 will be explained with reference to FIG.

First, insert the new glove 12 into the fixed old glove 3 (hereinafter referred to as the old glove 3).
(hereinafter referred to as new glove 12). next,
Using the bang 13, the intermediate portion of the base 31 of the old glove 3 and the intermediate portion of the base 121 of the new glove 12 are pressed against the inner peripheral surface of the fixed port 6. Here, the bang 13 is a device also called a sealing device, and has a rubber cylindrical body 133 with side plates 131 and 132 bonded to both ends thereof, and one end is rotatably fixed to the side plate 131 at the center in the longitudinal direction. and
The other end is a threaded rod 134 screwed into the side plate 132.
A handle 135 is fixed to the free end of the threaded rod 134. By turning the handle 135 and bringing the side plate 132 closer to the side plate 131, the bang 13 can be attached to the rubber cylindrical body 133.
can be deformed in the radial direction.

That is, when the handle 135 of the bang 13 is turned, the cylindrical rubber body 133 is deformed in the radial direction to the extent shown by the dotted line, so that the middle part of the base 31 of the old glove 3 and the middle part of the base 121 of the new glove 12 are connected to the fixed port 6. Can be pressed against the inner peripheral surface of the

Next, the sealing tightening band 10 and the O-ring 1 fixing the tip of the base 31 of the old glove 3
1, then remove the base 31 of the old glove 3.
Fold back to ring 11. Next, the base 121 of the new glove 12 is positioned on the outer periphery of the fixing port 6 so as to exceed the base 31 of the folded old glove 3, and tightly fixed with the tightening band 10. Then, rotate the handle 135 of the bang 13 in the opposite direction to loosen the pressure on the cylindrical rubber body 133, and then
2, and while grasping the old glove 3, drop it together with the O-ring into the shielding box 1. Finally, the replacement work is completed by tightening the new O-ring 11 to the base 121 of the new glove 12.

However, in the structure of the glove attachment part in such a conventional shielding box, only the tip of the base part 31 of the glove 3 is fixed to the outer periphery of the fixed port 6 using the tightening band 10 and the O-ring 11. . Therefore, the middle portion of the base portion 31 of the glove 3 is free within the inner periphery of the fixed port 6. For this reason, when the glove 3 is repeatedly operated, stress is concentrated on the tip of the base portion 31, and there is a risk that cracks or elongation may create gaps, causing the shielding material to leak to the outside.

In particular, with such a glove mounting structure,
Because the gloves are not sufficiently fixed, there is a great risk that shielding materials may leak outside during glove replacement work, and moreover, it is necessary to perform troublesome replacement work using a large-scale device such as the bung 13.

[Problem that the invention seeks to solve]

The present invention has been made in view of this point, and its purpose is to eliminate the drawbacks of the prior art described above, completely prevent the leakage of shielding substances from around the attachment part of the glove, Moreover, it is an object of the present invention to provide a structure for attaching a glove in a shielding box, which makes it easy to replace the glove.

[Means for solving the problem] The gist of the present invention is to attach a special stopper ring that can reduce the diameter inside the middle part of the base of the glove, and to use the radial expanding force of the stopper ring to expand the base of the glove. The structure of the glove attachment part in a shielding box is characterized in that the intermediate part is pressed into contact with the inner circumferential surface of a fixed port.

That is, the stopper ring used in the glove attachment structure of the shielding box of the present invention is composed of an elastic metal ring having an outer diameter larger than the inner diameter of the fixed port, and one side of the elastic metal ring is hooked at one point. There is a notch and a notch on the other side, and there is a side surface on the inside of one end on the side of the notch on the one side, and a side surface on the inside of the end on the other side on the side of the notch on the other side. There are lateral sides,
The one side center line of the one side end portion and the other side center line of the other side end portion are each slightly shifted inwardly, and a rubber elastic body is adhered to the outer periphery of the elastic metal ring. Moreover, when the elastic metal ring is attached to the inner peripheral surface of the fixed port, the diameter can be reduced to be smaller than the inner diameter of the fixed port. Since the elastic metal ring is in constant contact with the other side surface by pressure contact force, an expansion force acts on the elastic metal ring in the radial direction over its entire circumference.

[Effect]

The structure of the glove attachment part in the shielding box of the present invention is such that a special stopper ring that can reduce the diameter is attached to the inside of the middle part of the base of the glove, and the radial expansion force of the stopper ring allows the middle part of the base of the globe to be fixed to the fixed port. The objective is to effectively press against the inner circumferential surface.

That is, the stopper ring used in the present invention is composed of an elastic metal ring having an outer diameter larger than the inner diameter of the fixed port, and has a notch on one side and a notch on the other side that are hooked at one point of the elastic metal ring. Because of this, the diameter can be easily reduced, making it easy to install and remove it into the fixed port.

Here, the stopper ring has a notch on one side and a notch on the other side which are hooked at one point of the metal elastic ring, and the center line of one side of the one end and the center line of the other side of the other end Since these are slightly shifted inwardly, when installed in the fixed port, the one side surface and the other side surface facing each other can be constantly in contact with each other due to pressure contact force. Therefore, the stopper ring used in the present invention is like an elastic metal ring without a hooked cutout on one side and a cutout on the other side,
As a result, the radial expansion force generated by the diameter reduction acts over the entire circumference of the ring, and can effectively press the intermediate portion of the base of the glove against the inner circumferential surface of the fixed port.

Moreover, since the rubber elastic body is adhered to the outer periphery of the elastic metal ring, it is possible to softly contact the soft glove to prevent damage to the glove and to effectively seal the ring.

Therefore, in the glove attachment structure of the shielding box of the present invention, the tip of the base of the glove is fixed to the outer periphery of the fixed port fixed to the wall of the shielding box with a sealing tightening band and an O-ring. Therefore, the glove is double-fixed, and leakage of the shielding substance can be completely prevented. Furthermore, in addition to the distal end portion of the base of the glove, the intermediate portion within the fixing port is fixed, so that mechanical damage and slippage of the glove during handling operations can be effectively prevented. These functions work synergistically to significantly improve the safety of the glove attachment structure in the shielding box.

Moreover, this stopper ring is extremely easy to attach and detach. [Embodiment] Next, an embodiment of the structure of the glove attachment part in the shielding box of the present invention will be described with reference to the drawings.

FIG. 3 is a longitudinal cross-sectional view of a main part showing an embodiment of the structure of the glove attachment part in the shielding box of the present invention.

In FIG. 3, 1 is a shielding box, 2 is a wall, 14 is a port section, 15 is a fixed port provided on the wall 2, and 16 is a glove.

In FIG. 3, the fixed port 15 is fixed via a ring-shaped packing 8, a plate-shaped ring 7, and a bolt 9. The tip of the base 161 of the globe 16 is fixed to the outer periphery of the fixed port 15 by a sealing tightening band 10 and an O-ring 11.

Inside the intermediate portion of the base 161 of the glove 16 is a stopper ring 1 that characterizes the present invention.
7 is attached, and its radial expansion force presses the intermediate portion of the base 161 of the glove 16 against the inner circumferential surface of the fixed port 15 from inside.

The details of this stopper ring 17 will be explained below with reference to FIGS. 4 to 8.

FIG. 4 shows a perspective view of the stopper ring 17 that is attached to the inside of the intermediate portion of the base 161 of the glove 16.

As can be seen from FIG. 4, the stopper ring 17 is torn at one point and has a notch 18 on one side.
1 and the other side notch 182 are formed.

One side end 1 on this one side notch 181 side
9 has one side end surfaces 211, 212 and one side side surface 23. Further, the other side end portion 20 located on the other side notch side has other side end surfaces 221, 222 and another side side surface 24.

As can be seen from FIG. 4, the one side notch 181 is formed by three sides: one side side 23, one side end surface 212, and the other side end surface 222. Also,
The other side notch 182 is formed by three surfaces: the other side side surface 24, the other side end surface 221, and the one side end surface 211.

Also, as shown in Figure 4, the fixed port 15
One side surface 23 and the other side surface 24 of the stopper ring 17 when mounted inside are always in contact with each other with their opposing sides. That is, the pressure contact force in the direction of the arrow is always applied between the one side surface 23 and the other side surface 24. As shown in the enlarged view of the main part in FIG.
The center line 251 of and the center line 252 of the other side end 20
This is because they are slightly shifted inward.
Therefore, when the diameters of one side surface 23 and the other side surface 24 are reduced, a pressing force acts in the direction of the arrow in FIG. 4, and the adjacent side surfaces come into contact with each other, acting like a perfect elastic metal ring. can do. Therefore, the stopper ring 17 can exert pressure contact force over the entire circumference.

Here, the contact between the one side surface 23 and the other side surface 24 of the stopper ring 17 is due to the engagement of the pyramidal part and its corresponding recessed part, as shown in FIG. 7a.
Alternatively, as shown in FIG. 7b, it is also possible to engage a rectangular concave portion and a rectangular convex portion.

Further, a rubber elastic member 171 is adhered to the outer periphery of the stopper ring 17, and this rubber elastic member 171 may have a ring-shaped hollow as shown in FIG. Alternatively, a separately manufactured rubber elastic ring may be bonded to the ring-shaped groove on the surface.

In addition, the stopper ring 17 is fixed and removed using jigs 26 and 27 inside, as shown in FIG.
can be installed. When the jigs 26 and 27 of the stopper ring 17 are grasped by hand and compressed, the diameter of the stopper ring 17 can be easily reduced, so that the stopper ring 17 can be easily installed and removed. It should be noted that it is appropriate to remove the jigs 26 and 27 after installation, since they will interfere with the operation of the glove 16. When replacing the glove 16, the jigs 26 and 27 can be reattached.

The stopper ring 17 is temporarily removed from the fixed port 15 when replacing the glove 16, but at that time, as a matter of course, handling of the shielding material by the glove 16 is stopped, so there is no fear of leakage of the shielding material.

In addition, spring steel is suitable as the material for the stopper ring 17 in terms of its sealing effect.

〔Effect of the invention〕

The structure of the glove mounting part in the shielding box of the present invention is such that, in addition to fixing the tip of the base of the glove to the outer peripheral part of the fixed port, the middle part of the base of the glove is pressed against the inner peripheral surface of the fixed port using a special stopper ring. This completely prevents leakage of the shielding material from around the base of the glove, and also effectively prevents mechanical damage caused by handling the glove, resulting in safer glove handling and replacement work. It can significantly improve the properties and is industrially useful.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a shielding box, Fig. 2 is a longitudinal cross-sectional view of a main part of a glove mounting structure in a conventional shielding box, and Fig. 3 is a diagram showing a glove mounting structure in a shielding box of the present invention. FIG. 4 is a perspective view of a stopper ring used in an embodiment of the glove attachment structure in the shielding box of the present invention, FIG. 5 is a side view thereof, and FIG. FIGS. 7a and 7b are enlarged explanatory views showing other application examples of the cutout portion of the stopper ring, and FIG. An enlarged explanatory view, FIG. 8b is an enlarged explanatory view of a rubber elastic member adhered to the outer periphery of a stopper ring used in another embodiment of the present invention. 1: Shielding box, 2: Wall, 3, 12, 16: Glove, 4 , 14 : Exchange port part, 5: Shielding material,
6, 15: Fixed port, 7: Plate ring, 8: Packing, 9: Bolt, 10: Sealing tightening band, 11: O ring, 13: Bang, 17: Stopper ring, 19: One side end, 20 : Other side end, 23: One side side, 24: Other side side, 2
6,27: Jig, 31,161: Base, 61,1
51: Inner peripheral surface, 131, 132: Side plate, 133:
Rubber cylindrical body, 134: Threaded rod, 135: Handle, 171: Rubber elastic member, 181: One side notch, 182: Other side notch, 211, 212: One side end surface, 221, 222: Other side end surface, 25
1: One side edge center line, 252: Other side edge center line.

Claims (1)

[Claims] 1 A fixed port 15 is fixed to a through hole formed in the wall 2 of the shielding box 1 so as to protrude to the outside, and the tip of the base 161 of the globe 16 is attached to the outer periphery of the fixed port 15 with a sealing tightening bolt. Glove attachment structure in a shielding box, in which the glove 16 is fixed with a band 10 and an O-ring 11, and the intermediate portion of the base 161 of the glove 16 is pressed against the inner circumferential surface of the fixed port 15 by a stopper ring 17 mounted inside the glove 16. The stopper ring 17 is composed of an elastic metal ring having an outer diameter larger than the inner diameter of the fixed port 15, and has a notch 181 on one side and a notch 182 on the other side which are hooked at one point of the elastic metal ring. There is a side surface 23 on the inside of the one side end 19 on the side of the one side notch 181.
There is a second side surface 24 on the inside of the other side end 20 on the other side notch 182 side, and there is a line between the one side center line 251 of the one side end 19 and the other side of the other side end 20. They are slightly shifted inward from the center line 252, and a rubber elastic body 171 is adhered to the outer periphery of the elastic metal ring.
Moreover, the elastic metal ring is connected to the fixed port 15.
When installed in the fixed port 15, the diameter can be reduced to be smaller than the inner diameter of the fixed port 15, and when the diameter is reduced and installed in the fixed port 15, the one side surface 23 and the other side surface 24 facing each other can be A structure for attaching a glove in a shielding box, characterized in that the elastic metal rings are always in contact with each other by pressure contact force so that an expanding force acts on the elastic metal ring in the radial direction over its entire circumference.