JP2003054607A - Vessel plug, and vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent pollution by the leakage of liquid droplets when a vessel is sealed by a plug, and a needle is pierced for sampling. SOLUTION: A plug 1 fitted to a mouth 3 of a vessel 2 for storing, analyzing and carrying a dangerous sample of a nuclear fuel has a structure in which an absorption part or a sampling part 6 of a sponge rubber of a sponge structure is provided on a needle piercing/drawing part 5A. Pollution caused by the leakage or adhesion of the content can be reliably prevented thereby.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container stopper and a container, and more particularly to a stopper and a container for preventing contents (contained items) from leaking or leaking.

[0002]

2. Description of the Related Art A container, for example, a plastic container having a mouth fitted with a stopper, pierces a needle of an injector, a syringe or the like into the stopper and fills the container with a medicinal solution to transfer air (by spraying gas, etc.). There is a container for the purpose of sampling and temporarily storing it, which is used, for example, for containing a nitric acid solution containing uranium / plutonium used in nuclear fuel.

[0003]

In the stopper of the mouth of the container for the above-mentioned use, the chemical solution is attached to the surface of the stopper (rubber lid) at the time of inserting (withdrawing) the needle or the chemical solution from the tip of the needle at the time of withdrawing the needle. Leakage and contamination of the surrounding area should be avoided because the contents handled are extremely toxic such as radioactive elements. Also,
Even when the container is moved by air, it is necessary to avoid leakage or leakage through the needle insertion / removal portion.

[0004] Incidentally, Japanese Unexamined Patent Publication No. 10-185776 proposes a container for storing, analyzing, or transporting a dangerous substance, and the container has a mouth portion (plug portion).
It is disclosed to hold a drop catcher with a valve and wipe the needle withdrawn with the valve to dry. However, since the technique disclosed in this publication is a drop catcher, the liquid wiped must be retained in the cavity on the upper surface of the valve, and the retained liquid may leak.

Further, since the valve is a thin film, it was insufficient to wipe off the liquid adhering to the needle. Further, there are problems that the structure is complicated and the cost is high. SUMMARY OF THE INVENTION It is an object of the present invention to provide a container stopper and a container which can prevent leakage of the contents of the container, adhesion to the stopper, and the like by simply improving the structure, and thus the cost is low.

[0006]

The present invention relates to a container stopper having a needle insertion / extraction portion, and takes the following technical means in order to achieve the above object. That is, claim 1
The container stopper according to the above item is characterized in that the needle insertion / extraction portion is provided with a chemical liquid absorption portion. By adopting such a configuration, it is possible to prevent the liquid (chemical liquid) attached to the needle at the time of pulling out the needle from being absorbed into the absorbing portion and leaking or leaking to the outer surface of the stopper or the like.

The container plug according to a second aspect of the invention is characterized in that the needle insertion / removal portion is provided with a wiping portion for wiping off the chemical liquid attached to the needle. By adopting such a configuration, the chemical liquid adhering to the needle at the time of pulling out the needle is wiped off by the wiping portion, and therefore does not leak or leak to the outer surface of the stopper or the like. Therefore, even if the contents of the container are highly toxic such as radioactive elements, these contaminations can be prevented.

In the above-mentioned claim 1 or 2, the chemical liquid absorbing portion and the chemical liquid wiping portion can be formed of an elastic sponge structure (sponge layer) such as a non-woven fabric. It is recommended to use rubber (claim 3). If the sponge rubber is foamed rubber, the foamed rubber layer can be easily and easily created by slicing (cutting) the foamed rubber layer. Since the sponge rubber described above has a sponge layer (open cell layer) inside, it is useful for absorbing (impregnating) and wiping liquid, but at least on the exposed surface side (needle piercing surface of the stopper). It is recommended to form a skin layer (Claim 4).

When the skin layer is formed in this way,
Even if the liquid impregnated in the sponge rubber (impregnated by absorption or wiping) leaks or leaks from the inside of the sponge rubber, it is surely blocked (leakage) from leaking to the outer surface. In particular, the leakage of the chemical liquid is prevented even if vibration or the like is received during the pneumatic transfer. Here, the skin layer is a concept including a skin film, and the skin layer may be formed as a result of integral molding on the surface side of the sponge / rubber, or a skin layer may be separately formed to surface side of the sponge / rubber. It may be attached (adhered or the like) to.

Further, a container stopper according to a fifth aspect is a stopper main body made of an elastic material such as rubber and having a needle insertion / removal portion, and a chemical liquid absorption portion attached to the needle insertion / removal portion of the stopper main body or A wiping part, and the plug body is
It consists of an annular inner / outer skirt that holds the mouth of the container from the inside / outside, and a zenith that is connected to the top of the inner / outer skirt and closes the mouth. A concave portion is formed, and a sponge-rubber block body that constitutes a chemical solution absorbing portion or a wiping portion is fitted into the concave portion having a bottom to form a needle insertion / extraction portion.

In the above-mentioned claim 5, it is recommended that a skin layer for preventing the exudation or leakage of the drug solution is formed on the outside air exposed surface side of the block body (claim 6), and the bottomed concave portion. It is recommended that the bottom extends when the needle is pierced into the bottom and contracts when the needle is pulled out to form a through hole having a labyrinth structure (claim 7). When the through-hole having the labyrinth structure is formed in this manner, leakage resistance (including leakage time (path)) becomes large even if vibration or the like is received during pneumatic transportation, and leakage of the chemical liquid is prevented.

In the above-mentioned claims 3 to 6, the sponge rubber has chemical resistance and the Asker C hardness is 25 to 50.
It is recommended to use a hard sponge rubber (Claim 8). The above-mentioned sponge rubber may be any as long as it absorbs the leaked chemical liquid, and as a result, the Asker C hardness is 5 to 5.
Even a soft sponge or rubber of 24 degrees can perform its function, but when the needle is inserted (when piercing)
Since it is not desirable that tears and the like occur, a hard sponge rubber having an Asker C hardness of 25 to 50 degrees is recommended, and a hardness of 25 to 35 degrees is particularly desirable.

Further, the container to which the present invention is applied is not particularly restricted in its contents (container), but the above-mentioned stoppers according to claims 1 to 8 are attached to the mouth of the container. It is recommended that the container be capable of being infused with a nitric acid solution containing uranium / plutonium (Claim 9).

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a container stopper (rubber stopper, rubber lid) and a container according to the present invention will be described below with reference to the drawings. FIG. 1 shows a stopper 1 (rubber lid,
2 is a plan view thereof, and FIG. 3 shows a behavior when the needle 4 is mounted on the mouth portion (mouth stopper portion) 3 of the container 2 and sampling is performed. There is.
1 to 3, the stopper 1 is an elastic material such as rubber or resin,
The container 2 is preferably made of an elastomer material having chemical resistance and can be attached to the mouth portion 3 of the container 2 to seal, for example, dangerous substances (uranium, plutonium, etc.) in the container 2, and It is made of density polyethylene, but its material is arbitrary.

The stopper 1 is made of an elastic material such as rubber and has a needle insertion / removal portion 5A, and a chemical solution absorption portion 6 or a wiping portion 6 attached to the needle insertion / removal portion 5A of the stopper main body 5. And the plug body 5 includes the container 2
Annular inner and outer skirts 7 and 8 for holding the mouth portion 3 from inside and outside, and a zenith portion 9 that is connected to the top portions of the inner and outer skirts 7 and 8 and closes (seals) the mouth portion 3 And a bottomed concave portion 10 is formed in the zenith portion 9, and a sponge / rubber block body 11 constituting the chemical solution absorbing portion 6 or the wiping portion 6 is fitted in the bottomed concave portion 10. It is the needle insertion / extraction portion 5A.

Although the mounting portion of the plug body 5 to the mouth portion 3 may have a screwing structure which is generally adopted, as shown in the drawing, an annular inner / outer portion for holding the mouth portion 3 from inside / outside is provided. It is preferable that the outer skirts 7 and 8 are formed. At this time,
The inner skirt 7 is in close contact with the inner peripheral surface of the mouth 3 while the mouth 3
In order to facilitate the insertion into the mouth part, the tip is tapered, and when it is inserted (inserted) into the mouth part 3, it slightly elastically contracts in the radial inward direction, and after the insertion, it elastically restores in the radial outside direction, and the mouth part is restored. The inner surface of 3 is closely attached.

On the other hand, the outer skirt 8 is inverted as shown by an arrow A in FIG. 1 with the root 8A with the zenith 9 as a reference after the inner skirt 7 is press-fitted (fitted) into the mouth 3 as described above. The outer peripheral surface of the mouth portion 3 is tightly adhered, and the inside and outside of the mouth portion 3 are clamped here to prevent the mouth portion 3 from coming off. It is desirable to form the retaining ring 3A. Regarding the outer skirt 8, it is also recommended to form the slit 8A as shown by the phantom line in FIG. 1 in order to facilitate the reversal property (mouth part mounting property).

As shown in FIG. 3, when the needle 4 is inserted into the needle insertion / extraction portion 5A and the needle 4 is pulled out (for example, for sampling work for analyzing the contents in the container 2) (Used), suctioning (impregnating) or wiping off the droplets adhering to the needle 4. Therefore, in addition to a sponge structure such as a nonwoven fabric, N
R rubber, IR rubber, SBR rubber, NBR rubber, EPDM
It can be made of rubber foam material such as rubber, but considering chemical resistance, sponge with chemical resistance such as chloroprene rubber (CR rubber) and chlorosulfonated polyethylene rubber (CSM rubber). The block body 11 made of rubber (rubber foam having open cells) is most suitable.

Instead of forming the block body 11, a sponge structure having chemical resistance (open-cell material such as sponge and rubber) is insert-molded in the zenith portion 9 to absorb or wipe the chemical solution 6 into the zenith portion. It may be integrally molded with the 9. Further, when the block body 11 is formed as shown in the figure, a bottomed recess 10 is formed in the zenith portion 9, and the block body 11 is press-fitted (fitted) into the bottomed recess 10.
The outer diameter of the block body 11 is, for example, 0.5 than the diameter of the recess 10.
It is preferable that the block body 11 is formed to have a large diameter of ˜2.0 mm and a retaining protrusion 10A is formed on the opening edge of the bottomed recess 10 so that the block body 11 does not fall out when the needle 4 is pulled out. Is also desirable from the viewpoint of improving the effect of wiping off the chemical liquid adhering to the needle 4.

The block body 11 is desirable from the viewpoint of the suction (impregnation) action and / or the wiping action of the drug solution by thickening this gauge, but on the other hand, the expansion and contraction (behavior) of the bottomed portion 10B when the needle 4 is inserted and removed. The gauges of the block body 11 and the bottomed portion 10B are determined in consideration of the shield effect of the bottomed portion 10B, and the outer peripheral edge (boundary portion with the inner skirt 7) of the bottomed portion 10B is formed in the constricted portion 12, as shown in FIG. As shown in (2), when the needle 4 is inserted and removed, the bottomed portion 10 extends or contracts with the constricted portion 12 as a base point, so that the insertion hole 10C having the labyrinth structure can be formed.

Therefore, the bottom of the recess 10 (the block body 11
The height C from the constricted portion 12 to the tip of the inner skirt 7 is B> C with respect to the height B from the mounting surface) to the tip of the inner skirt 7. That is, when the needle 4 is pierced as shown in FIG. 3 (1), the bottomed portion 10B extends from the constricted portion 12 as a base point, and the bottomed portion 10B is inserted into the needle 4
When the needle 4 is withdrawn after the needle has penetrated (the end of injection of the chemical solution or sampling), the extended bottomed portion 10B is withdrawn as shown in FIG.
Since B contracts, the through hole 10C becomes a labyrinth structure hole as shown in FIG. 3 (3), and the leakage resistance of the contents and the leakage time are increased (long) to prevent the leakage. Even if the contents should leak out from the holes 10C, the block body 11 made of sponge rubber is impregnated with the contents.

When the bottomed portion 10A is pierced by the needle 4 and is extended, it is not desirable that the bottomed portion 10A tears and breaks from the pierced portion of the needle 4 as a base point. Is determined in consideration of this, and in the illustrated example, the thickness of the block body 11 and the bottomed portion 10A
Are approximately the same in thickness. The block body 11 can be formed into a circular shape (including an elliptical shape) as shown in FIG. 4 and a rectangular shape (including a polygonal shape) as shown in FIG. 5, and the entire block body 11 has a foam layer. However, from the standpoint of preventing exudation of drug droplets (droplets) wiped off the adhering liquid or sucked (impregnated), at least the needle piercing surface (outside air exposed surface side of the block body) is the skin layer 1
1A is preferable, and FIGS. 4 (2) and 5 (2) exemplify the skin layer 11A formed or attached.

By forming the skin layer 11A in this manner and forming the sponge layer 11B inside, the sponge layer 1
The skin layer (skin film) 11A prevents the liquid droplets impregnated in 1B from leaking to the outside.
In addition, the block body 11 includes the sponge layer 1 on the needle sticking surface side, as shown in FIGS. 4 (3) and 5 (3).
The sponge layer 11D on the content side (inner side) has a large degree of foaming with respect to 1C, that is, it is desirable from the viewpoint of preventing leakage of droplets also by forming the sponge layer 11C into fine open cells.

Further, the material of the block body 11 made of sponge rubber is NR rubber, IR rubber, SBR rubber, NBR.
The foamed rubber is rubber, CR rubber, CSM rubber, EPDM rubber or the like, but CR rubber and CSM rubber are preferable in view of chemical resistance and a molding method (pressurizing method). In addition, the block body 11 has a sponge layer 11B, 1 when the chemical liquid leaks.
It is necessary to absorb (impregnate) with 1C and 11D,
As shown in FIG. 3, a hard sponge / rubber having an Asker C hardness of 25 to 50 degrees, preferably an Asker C hardness of 25 to 35 degrees, in order to prevent tearing and the like from occurring when the needle 4 is inserted (pierced). It is desirable to use a hard sponge / rubber, and the specific gravity is 0.24 ~
0.35 g / cm ³ is effective.

Of course, this does not prevent the adoption of soft sponge rubber having an Asker C hardness of 5 to 24 degrees,
The specific gravity may be slightly lighter or heavier than the above. In the first embodiment shown in FIGS. 1 to 3 above, the piercing surface of the needle 4 (the initial piercing) is sponge rubber (including the skin layer), and therefore the piercing posture can be made good, Immediately before the end of piercing (penetration), there is a bottomed portion 10B, and the piercing resistance gradually increases here, and there is no discomfort in piercing. On the other hand, the withdrawal resistance is gradually small at the time of withdrawal (during sampling), and it depends on the sponge rubber. The absorption (impregnation) or / and wiping action is smoothed.

That is, the aforementioned publication (Japanese Patent Laid-Open No. 7-1677).
No. 54), the piercing surface was initially hard and then
Since the cavity is in the middle and pierces the valve of the drop catcher, the needle piercing resistance and the withdrawal resistance will fluctuate each time (midway fluctuation),
In the embodiment of the present invention, the leakage of the liquid droplets is eliminated. FIG. 6 shows another useful embodiment (second embodiment) of the stopper according to the present invention or a container equipped with this stopper (however, the container is omitted in FIG. 6), and the basic configuration and operation are shown in FIGS. Since it is common to the plug described above with reference to the like, common parts are referred to by common reference numerals, and the differences will be described below.

In FIG. 6, the zenith portion 9 constituting the needle insertion / removal portion 5A is formed in a thin film or layer, and in the figure which is a mounting portion to the mouth plug portion of the container, it is formed on the inner peripheral tubular portion of the inner skirt 7. Is attached to a block holder 13 made of an elastic and chemical-resistant material in which a sponge-rubber block body 11 constituting the absorbing section or wiping section 6 is fitted. The inner peripheral surface of the inner skirt 7 is fitted and adhered to the inner peripheral surface of the inner skirt 7 through elastic deformation or the like, and the upper surface of the block body 11 is adhered to the lower surface of the zenith portion 9. Also in the embodiment shown in FIG. 6, the needle insertion / extraction portion 5A has the absorption portion 6 or the wiping portion 6 for the chemical liquid adhering to the needle,
The absorbing portion (impregnation portion / adsorption portion) 6 or the wiping portion 6 is made of sponge / rubber.

The embodiment of the present invention is as described above.
The container stopper or container of the present invention is used for accommodating dangerous substances such as uranium and radioactive elements such as plutonium, and for analysis (sampling) or air transportation.
Its use is arbitrary, and for example, Japanese Patent Laid-Open No. 10-1857.
It may be the gas analysis container disclosed in Japanese Patent Publication No. 76 or its stopper. Further, the bottomed portion 10B and the block holder 13 also have an action of wiping off the liquid droplets adhering to the needle 4. This action is advantageous because the block 11 made of sponge rubber has a double wiping action.

[0029]

As described in detail above, according to the present invention, it is possible to provide a container stopper and a container that reliably prevent (prevent) contamination due to leakage and adhesion of contents, at a low cost with a simple structure improvement. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a stopper according to the present invention.

FIG. 2 is a plan view of the stopper of FIG.

FIG. 3 is a cross-sectional view showing the behavior of the plug of the first embodiment,
(1) is a needle insertion (piercing), (2) is a needle withdrawal, and (3) is an enlarged main part after withdrawal.

FIG. 4 is a perspective view showing three examples of circular sponge and rubber.

FIG. 5 is a perspective view showing three examples of rectangular sponge and rubber.

6A and 6B are a cross-sectional view and a front view of the stopper according to the second embodiment.

[Explanation of symbols]

1 stopper 2 containers 3 mouth 4 needles 5 stopper body 5A needle insertion part 6 Absorption part (wiping part) 11 Sponge rubber (block body)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G01N 35/02 G01N 35/02 BF term (reference) 2G052 AA38 AB28 AC26 AD06 AD26 AD46 CA14 CA18 CA28 CA48 DA12 DA22 JA08 JA16 JA23 JA26 2G058 AA01 BB06 CA02 EA02 EA06 EA08 HA01 3E084 AA02 AA25 AB05 BA02 CA01 CC03 DA01 DB13 DC03 EC03 EC09 FA09 FC07 KB10 LF08

Claims (9)

[Claims] 1. A stopper for a container having a needle insertion / removal portion, wherein the needle insertion / removal portion is provided with a chemical liquid absorbing portion. 2. A container stopper having a needle insertion / extraction section, wherein the needle insertion / extraction section is provided with a wiping off section for wiping off the chemical liquid adhering to the needle. 3. A stopper for a container, characterized in that the absorbing portion for the chemical liquid and the wiping portion for the chemical liquid are sponge rubber. 4. The container stopper according to claim 3, wherein a skin layer for blocking the exudation or leakage of the chemical liquid is formed on at least the outside air exposed surface side of the sponge rubber. 5. A stopper for a container having a needle insertion / extraction part, which is made of an elastic material such as rubber and has a needle insertion / extraction part, and a chemical solution attached to the needle insertion / extraction part of the plug main body. The stopper body is connected to the top and bottom of the inner and outer skirts to hold the mouth of the container from inside and outside, and closes the mouth. The zenith part is formed with a bottomed recess, and the bottomed recess is fitted with a sponge / rubber block body that constitutes the chemical solution absorption part or the wiping part. It is said that the container stopper. 6. The container stopper according to claim 5, wherein a skin layer that prevents the chemical liquid from leaking or leaking is formed on the outside air exposed surface side of the block body. 7. The through hole of the labyrinth structure can be formed by extending the bottom of the bottomed recess when the needle is pierced therein and contracting when the needle is pulled out. 5. The container stopper according to item 5. 8. The container stopper according to claim 3, wherein the sponge rubber has chemical resistance and is a hard sponge rubber having an Asker C hardness of 25 to 50 degrees. . 9. A container, wherein the stopper according to any one of claims 1 to 8 is attached to the mouth of the container, and the container is capable of being infused by containing a nitric acid solution containing uranium / plutonium.