JPS5837396Y2 - Plug of plastic container for infusion - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stopper for a plastic container for liquids such as blood.

Conventionally, after liquids such as blood are filled into a container, it is sealed with a plastic cap and sterilized, then a rubber stopper is inserted or covered, and the cap is constructed with a shrinkable overwrap such as polyvinyl chloride. are doing.

A major disadvantage of this structure is that the rubber stopper has not been subjected to a sterilization process, making it unhygienic and requiring the use surface of the rubber stopper to be wiped with alcohol or the like before use.

Furthermore, even if the rubber stopper and the plastic cap are fitted, there is a drawback that liquid leaks from the boundary when the needle is inserted or removed.

The present invention was developed in consideration of these drawbacks, and is extremely hygienic as it prevents the contents from leaking during use and can be sterilized in a sealed state. There is an advantage that there is no need to sterilize the insertion part of the needle.

The invention will now be explained in more detail with reference to the illustrated embodiments.

FIG. 1 is a cross-sectional explanatory view of the stopper and its vicinity of the plastic container for infusion according to the present invention.

1 is the main body of the plastic container A; 2. is the flange of the container opening.

B is a plug that fits into this opening.

Reference numeral 3 denotes a rubber stopper, and the stopper B is made of the same plastic as the container body and is constructed to surround the entire outer periphery of the rubber stopper 3 by insert molding.

Reference numeral 4 denotes a flange of the stopper B, which is adapted to fit smoothly with the flange 2 of the container body A.

5 is a fitting part to the inner wall of the container opening.

Reference numeral 6 denotes a canopy portion of the stopper, which is shaped like a thin film, and a knocking rod 7 stands upright in the center thereof.

Reference numeral 8 denotes a plastic thin film of the same quality as the stopper body, and it is important that it be larger than the outer circumference of the rubber stopper 3, which is necessary for manufacturing the stopper.

That is, the rubber stopper 3 is insert-molded in a cavity while being completely surrounded by the outer periphery of the plastic.If the rubber stopper was placed directly on the upper mold, the rubber stopper could not be completely surrounded and covered by the plastic. It is necessary to perform injection molding in two steps.

Therefore, a thin film 8 of the same quality as this plastic is placed on the mold,
Next, with the rubber stopper 3 positioned thereon, molten resin is injected and insert molding is performed.

Since the surface of the rubber stopper 3 has low adhesion, if this thin film 8 is smaller than the outer circumference of the rubber stopper 3, the plastic thin film 8' will be injected with the rubber stopper 3, as shown in the cross-sectional diagram of FIG. Each surface is pressed down by the resin, and the degree of adhesion of the thin film is low, making it difficult for the film to evenly hold the film from the outer periphery.

Therefore, if this thin film 8 has a larger outer circumference than the rubber stopper 3 and is insert-molded, the thin film 8 will be formed by the press-fitted plastic at the tip edge of the rubber stopper, as shown in the cross-sectional diagram of FIG. The leading edge of the holder can be pinched and firmly adhered to the holder.

In addition, the top of the rubber stopper 3 is covered with a thin plastic film.
Furthermore, by configuring the stopper B so that the slightly thick push rod 7 stands upright in the center, the outer periphery of the stopper B with the rubber stopper inserted in the center is completely surrounded and covered with plastic. As shown in the cross-sectional explanatory diagram of FIG. 4, by tilting the knocking rod 7 to one side, the membrane-like coating part 6 from the outer periphery 9 of the knocking rod on the rubber stopper 3 is peeled off at the base of the rod, and the upper surface of the rubber stopper is removed. Since this is exposed, the needle can be inserted using this as the insertion port, and there is no need to sterilize the rubber stopper again with alcohol or the like.

This plug B must be molded and fitted into the opening of the container main body, and the flanges 2 and 4 must be fused at their contact surfaces 10 to seal the container.

The plastic thin film 8 located under the rubber stopper 3 has an angle of 0°2.
~Q, the optimal thickness is 5 mm, and the thickness of the membrane part 6 covering the upper surface of the rubber stopper 3 is 0.4 to 2 mm. It is preferable that the diameter of the tipping rod 7 be 2 to 1Q mm.

The rubber stopper 3 is molded with a plastic insert and is under pressure inward, so when a needle is inserted into the rubber stopper, the area around the needle is tightly pinched, causing liquid to leak from between the needle and the rubber. It is a great advantage of the present invention that this is not observed at all.

Furthermore, polypropylene, which is heat resistant, is recommended as the plastic of the present invention.

As described above, the container stopper of the present invention has a rubber stopper positioned in the center and is surrounded by plastic, and the stopper is in contact with the bottom surface of the rubber stopper and has a slightly outer periphery than the rubber stopper. The stopper is injection molded into a thin film-like structure in which a thin film of the same quality as the above-mentioned plastic with a large diameter is placed, and the upper surface of the rubber stopper has a push rod.

Note that the number of insertion ports for the injection needle can be increased by using a plurality of push rods instead of one push rod.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional explanatory view of the stopper and its vicinity of the plastic container for infusion according to the present invention; FIG. 2 is a partial cross-sectional view showing the case where the outer circumference of the plastic thin film is smaller than the outer circumference of the rubber stopper; and FIG. The figure is a partially sectional explanatory view showing the case where the outer circumference of the plastic thin film is larger than the outer circumference of the rubber stopper, and FIG. 4 is a cross-sectional explanatory view showing how to use it. DESCRIPTION OF SYMBOLS 1... Container body, 2... Flange of container opening, 3... Rubber stopper, 4... Flam of stopper, 5... ...The fitting part of the stopper to the inner wall of the container opening, 6...The plastic thin film of the canopy of the stopper,
7... Knocking down stick, 8,8'... Plastic thin film, 9... Base of knocking down stick, 10...
...The joint between the brim of the stopper and the container body, A.
...container body, B...stopper body.

Claims (1)

[Scope of utility model registration request] In a stopper for a plastic container for liquid such as blood, the stopper has a rubber stopper positioned in the center and is surrounded by plastic, and the stopper is in contact with the bottom surface of the rubber stopper. The outer circumference is larger than the outer circumference of the rubber stopper, and the outer circumference has a thin film of the same quality as the above plastic sandwiched by plastic, and the rubber stopper and the top surface are injected into a thin film structure with a tipping rod. A plug for a plastic container for infusion, characterized by being molded.