JPH08988Y2 - Container stopper - Google Patents

Description

TECHNICAL FIELD The present invention relates to a stopper used for a physics and chemistry container such as a test tube and a flask, which enables gas exchange inside and outside the container.

2. Description of the Related Art Conventional technology and its problems Conventionally known as this type of container stopper is a latex stopper having a center hole formed therein and cotton filled in the hole, or the stopper itself is made of cotton. It is a thing.

Therefore, the amount of gas exchanged with such cotton varies depending on the filling condition of the cotton, and the amount of gas exchanged decreases with strong filling, and the amount of gas exchange increases with weak filling, but dust from the outside , Dust, bacteria, etc., easily enter. Moreover, it can be used only once. Further, the latex-made one has a problem in that when a tissue-cultured one in a container, that is, when a plant such as bio is grown, the plug is solute and the liquid in the container is contaminated.

Therefore, the present invention solves the above-mentioned conventional problems, can maintain a sufficient amount of gas exchange, the gas composition in the container can be maintained at the same level as that of the outside air, and dust from the outside, dust, It is an object of the present invention to provide a stopper that can reliably prevent invasion of foreign matter such as bacteria and can be repeatedly used any number of times and is suitable for a container for tissue culture.

Means for Solving the Problems In order to achieve the above object, the container stopper of the present invention comprises a stopper fitted to the mouth of a physics and chemistry container such as a test tube and a flask, and the stopper is the container It is made of silicone rubber or silicone resin having a thin film portion capable of exchanging gas inside and outside. In the above, fitting includes not only the case of fitting to the mouth of the container from the outside but also the case of fitting from the inside. The thin film portion is preferably provided in the center of the top wall of the stopper.

By using the stopper as described above, by setting the thin film portion to a thickness suitable for the application, the gas exchange between the inside and outside of the container smoothly proceeds through the thin film portion, without causing fluctuation in the exchange amount, Gas exchange will always be effectively maintained. Further, since the stopper including the thin film portion is made of silicone rubber or silicone resin, it can be repeatedly used by rewashing and resterilizing. Furthermore, in addition to being able to reliably prevent foreign matter such as dust, dirt, and bacteria from entering from the outside, it is particularly suitable for a container for tissue culture such as biotechnology.

Embodiment FIG. 1 shows a state where the container stopper 1 of the present invention is attached to the mouth portion 3 of a flask 2. The stopper 1 comprises a cylindrical stopper body 5 having a lower end opening as shown in an enlarged sectional view in FIG. The plug body 5 is entirely made of silicone rubber, and an annular engagement recess 6 with which the expanded upper end portion of the flask 2 is engaged is formed at the upper end portion of the inner peripheral wall, and below it. An annular flange 7 is formed as a seal portion. Further, a thin film portion 8 that allows gas exchange between the inside and outside of the flask 2 is formed in the central portion of the top wall of the stopper 5.
The thickness of the thin film portion 8 is 1 mm or less, preferably 0.05 mm to 0.3
formed to mm. In this embodiment, the thin film portion 8 is formed in the central portion of the top wall of the stopper 5, but as another example, the entire top wall of the stopper 5 may be formed in the thin film portion 8. Since the thin film portion 8 and the thin film portion 8 are molded separately, the thin film portion 8 may be bonded to the upper end opening of the plug 5 with an adhesive, which facilitates processing.

When the stopper 1 as described above is fitted to the mouth portion 3 of the flask 2 as shown in FIG. The outer peripheral surface is pressure-contacted, and the airtightness of the fitted plug 1 and flask 2 is maintained.

Then, gas exchange between the inside and outside of the flask 2 is performed through the thin film portion 8 formed in the central portion of the top wall of the stopper 1.

FIG. 3 shows another embodiment of the stopper. In this embodiment, the stopper 11 made of silicone rubber has the entire stopper 15 formed to be as thin as the thin film portion 8 and has a film shape. When fitting into the mouth portion 3 of the flask 2, the peripheral wall of the film-like plug body 15 is expanded and fitted by utilizing the elastic force of silicone rubber.
Therefore, in the case of this embodiment, the entire top wall of the plug body 15 exchanges gas.

FIG. 4 shows still another embodiment, in which the silicone rubber stopper 21 of this embodiment is used for the test tube 22, and the stoppers 1 and 11 of the respective embodiments are placed outside the mouth 3 of the flask 2. It is basically different in that it is fitted and mounted from the inside, while it is fitted and mounted from the inside into the mouth portion 23 of the test tube 22. The stopper 21 has a cylindrical stopper 25 having an outer diameter slightly larger than the inner diameter of the mouth portion 23 of the test tube 22, and a thin film portion 28 for gas exchange is formed at the center of the top wall of the stopper 25. When fitting the test tube 22 into the mouth portion 23, the elastic force of the silicone rubber is used to make the plug 25
Is press-fitted into the mouth portion 23 from the peripheral wall of the lower end portion thereof.

It should be noted that each of the embodiments described above merely shows suitable ones depending on the type of the container, and the present invention is not limited to these embodiments. Further, the silicone rubber mentioned as the material may be a silicone resin.

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned structure, it is possible to always effectively ensure the necessary gas exchange inside and outside the container through the thin film portion. Also, since the entire plug body including the thin film part is made of silicone rubber or silicone resin, it can be easily re-cleaned.
It can be re-sterilized, can be used repeatedly, is economical, and in addition, it is very easy to use. Further, the silicone rubber or silicone resin stopper can surely prevent foreign substances such as dust, dirt, and bacteria from entering from the outside, and is very suitable as a container for tissue culture such as biotechnology. There is an effect.

[Brief description of drawings]

FIG. 1 is an overall front view of a container stopper attached to the mouth of a flask showing an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of a half portion of the same stopper and flask fitting part. FIG. 3 is an enlarged sectional view of a half portion of a fitting portion of a stopper and a flask of another embodiment, and FIG. 4 is an enlarged sectional view of a fitting portion of a stopper and a test tube according to still another embodiment. 1,11,21 …… Container stopper, 2 …… Flask, 3,23 …… Mouth, 5,15,25 …… Stopper, 7 …… Flange, 8,28 …… Thin film part, 22 …… Test tube

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B65D 51/16 Z

Claims (2)

[Scope of utility model registration request] 1. A stopper for fitting into a mouth of a physics and chemistry container such as a test tube or a flask, which is made of silicone rubber or silicone resin having a thin film portion capable of gas exchange inside and outside the container. Stopper for containers characterized by being 2. The container stopper according to claim 1, wherein the thin film portion is provided in a central portion of the top wall of the stopper.