JPH0613711Y2 - Cap for infusion container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a cap for an infusion container that seals the mouth of an infusion container.

<Prior Art> Conventionally, as a cap for an infusion container, there has been provided one in which an annular resin outer cap connected to a mouth portion of the infusion container is internally provided with a rubber stopper for piercing an infusion needle. .

As the cap, a rubber stopper is inserted into the outer cap by insert molding (see, for example, Japanese Utility Model Laid-Open No. 1-262839), and the rubber stopper is sandwiched between the outer cap and the inner cap fitted therein. Stuff (for example, actual development Sho 56-116042
(See Japanese Patent Publication) and the like are known.

In addition, as a structure for plugging the mouth of an infusion container, a rubber stopper is fixed to the mouth by heating and pressing the mouth of the infusion container to close the mouth (Japanese Patent Laid-Open No. 1-12
6970), after sequentially inserting a sealing stopper and a rubber stopper into the mouth portion of the infusion container, the mouth portion and the sealing stopper are heated and pressed to heat-weld, and at the same time, the rubber stopper is sealed. The one that is installed inside the mouth together with the mouth plug (see JP-A-63-252152).

It has been known.

<Problems to be Solved by the Invention> Since the insert molding is performed on the cap described above, there are problems that the manufacturing cost is high and the manufacturing process is complicated.

As for the cap, since an inner cap for sandwiching the rubber stopper with the outer cap is required, there is a problem that the number of parts is large and the cost is high.

Regarding the sealing structure of No. 3, since the rubber stopper is only fixed to the mouth portion of the infusion container, there is a problem that the inner solution easily leaks from the gap between the mouth portion and the rubber stopper.

Regarding the sealing structure of No. 2, there was a problem that the welding of the mouth of the infusion container and the sealing plug was insufficient and the inner solution was easily contaminated with bacteria.

In particular, with regard to the above-mentioned cap, since almost no external pressure was applied to the rubber stopper, when the infusion needle was pierced, the internal solution sometimes leaked out through the gap formed between the rubber stopper and the infusion needle. . Further, when the infusion needle is pulled out from the rubber stopper, there is also a problem that the inner solution is likely to leak from the pinhole formed in the rubber stopper due to the infusion needle being pierced.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cap for an infusion container that has a simple structure, a low product cost, and a reliable closure.

Another object of the present invention is to provide a cap for an infusion container capable of preventing the inner solution from leaking or being contaminated with dust or bacteria by piercing a rubber stopper with an infusion needle.

<Means for Solving the Problems> A cap for an infusion container of the present invention for achieving the above-mentioned object has a rubber cap side and an infusion container side formed by a thin film integrally formed with the outer cap inside the outer cap. It is characterized in that the outer peripheral upper portion of the outer cap is crimped inward.

Here, "caulking inward" means that the resin on the outer peripheral upper portion of the outer cap is heated and pressed at a temperature at which it does not melt to curve inward.

However, it is preferable that at least a part of the upper surface of the rubber plug is covered with a peelable peel seal.

<Operation> According to the cap for an infusion container having the above-described configuration, the thin film integrally formed with the outer cap can prevent the inner solution of the infusion container from leaking between the outer cap and the rubber stopper.

Further, since the inner cap is unnecessary, the structure can be simplified.

Moreover, since the rubber stopper is elastically compressed in the center direction by caulking the outer peripheral upper portion of the outer cap,
When the infusion needle is pierced into the rubber stopper, the rubber stopper and the outer circumference of the infusion needle can be brought into close contact with each other with good airtightness, and when the infusion needle is pulled out, the pin of the rubber stopper is caused by the piercing of the infusion needle. The hole can be reliably blocked.

Particularly, when at least a part of the upper surface of the rubber stopper is covered with a peelable peel seal, the portion covered by the peel seal is prevented from being contaminated with dust or bacteria. You can

<Embodiment> An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view showing a cap A for an infusion container of the present invention. The cap A is an outer cap 1 that is connected to an infusion container B such as an infusion bag or an infusion bottle by heat welding.
A rubber plug 2 for piercing an infusion needle is fitted into the above, and a part of the upper surface of the rubber plug 2 is covered with a peel seal 3.

The outer cap 1 is an annular one that is integrally molded of synthetic resin, and is formed in a substantially double structure having an outer peripheral ring 10 and an inner peripheral ring 11 connected to each other at the bottom. A thin film 12 for preventing liquid leakage is formed inside the outer cap 1. The thin film 12 is stretched near the upper edge of the inner peripheral ring 11, and the thin film 12 causes the inside of the outer cap 1 to be located on the rubber stopper 2 side and the infusion container B.
It is separated from the side.

The rubber plug 2 is formed with a thinned portion 21 for piercing an infusion needle, and at least the upper portion of the thinned portion 21 is covered with a peel seal 3. Further, annular grooves 22 and 23 are formed near the peripheral edges of the upper and lower surfaces of the rubber plug 2, and the rubber plug 2 has the tip portion of the outer peripheral ring 10 of the outer cap 1 introduced into the groove 22 on the upper surface side. The outer cap 1 is internally mounted with the tip of the inner peripheral ring 11 introduced into the groove 23 on the lower surface side.

The rubber plug 2 is fixed by caulking the upper part of the outer peripheral ring 10 of the outer cap 1 in a state of being loaded inside the outer cap 1. When caulking the outer cap 1, the rubber plug 2 Is positively pressed toward the center to elastically compress the rubber plug 2.

FIG. 2 is a cross-sectional view showing a step of incorporating the rubber plug 2 into the outer cap 1. As shown in the figure, in the rubber plug 2, the caulking portion 14 at the tip of the outer peripheral ring 10 in which the step portions 14a and 14b for refraction are formed is arranged along the curved portion 41 of the die 4 heated by the heater block 40. By caulking, the outer cap 1 is fitted. When the outer cap 1 is caulked, the outer peripheral upper part of the outer peripheral ring 10 is tilted inward, and the rubber plug 2 is contracted by pressing the rubber plug 2 toward the center at the tip of the outer peripheral ring 10. There is.

By crimping the outer cap 1, the gloss of the resin surface is increased, so that there is an advantage that a cap having an aesthetic appearance can be obtained.

The peel seal 3 is made of a resin or paper sheet or film, and is peelably adhered or heat-welded to the rubber plug 2. The peel seal 3 can be easily peeled from the rubber plug 2 by pulling upward the tongue piece 31 portion protruding from the outer cap 1.

With the above configuration, the thin film 12 inside the outer cap 1 reliably prevents the inner solution in the infusion container B from leaking from between the outer cap 1 and the rubber stopper 2 or being contaminated with bacteria. be able to. Further, since it is composed only of the outer cap 1 and the rubber plug 2, the number of parts is small and the structure can be simplified. Further, since the rubber plug 2 can be internally provided by caulking the outer cap 1, it can be manufactured more efficiently and at a lower cost than insert molding. Moreover, since the rubber stopper 2 is elastically compressed toward the center, when the infusion needle is pierced into the rubber stopper 2, the rubber stopper and the outer periphery of the infusion needle are hermetically sealed by the elastic repulsive force of the rubber stopper 2. As a result, the inner solution does not leak along the outer circumference of the infusion needle. Further, when the infusion needle is pulled out from the rubber stopper 2, the pinhole generated in the rubber stopper 2 due to the puncture of the infusion needle is certainly blocked, and as a result, the internal solution may leak from the portion pierced by the infusion needle. Absent.

Furthermore, since the portion of the upper surface of the rubber stopper 2 where the infusion needle is pierced is covered with the peel seal 3, it is possible to prevent the portion from being contaminated with dust or bacteria. Therefore, by peeling the peel seal 3 from the rubber stopper 2 and then piercing the infusion needle, it is possible to prevent the internal solution from being contaminated with dust or bacteria.

As a method of incorporating the rubber plug 2 into the outer cap 1, the outer cap 1 may be crimped by heating the upper portion of the outer cap 1 to soften it and then pressing a die at room temperature.

On the other hand, the peel seal 3 may cover the entire upper surfaces of the outer cap 1 and the rubber plug 2.

<Effect of device> As described above, according to the cap for an infusion container of the present invention, the thin film inside the outer cap surely prevents the inner solution from leaking and the inner solution from being contaminated with bacteria or the like. can do.

In addition, since the number of parts is small and it is not necessary to perform troublesome insert molding, the product cost can be reduced.

Moreover, since the rubber stopper is elastically compressed toward the center, the rubber stopper can be closely adhered to the infusion needle piercing the rubber stopper with good airtightness. It is possible to prevent the internal solution from leaking, and also to prevent the internal solution from leaking from the part as a result of surely closing the puncture mark of the infusion needle when the infusion needle is pulled out from the rubber stopper. be able to.

In particular, when at least a part of the upper surface of the rubber stopper is covered with a peelable peel seal, it is possible to prevent the part covered with the peel seal from being contaminated with dust or bacteria. Because it is possible, after peeling off the peel seal from the rubber stopper, by piercing the infusion needle into the part of the rubber stopper covered by the peel seal,
There is a unique effect that the internal solution can be prevented from being contaminated with dust and bacteria.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a cap for an infusion container of the present invention, FIG. 2a is a sectional view showing a step of incorporating a rubber stopper into an outer cap, and FIGS. FIG. 1 ... Outer cap, 2 ... Rubber stopper, 3 ... Peel seal, 12 ... Thin film, B ... Infusion container.

Claims (2)

[Scope of utility model registration request] 1. A cap for an infusion container in which a rubber stopper is installed in an annular outer cap connected to the mouth of the infusion container, wherein the inside of the outer cap is formed by a thin film integrally formed with the outer cap. A cap for an infusion container, which is divided into a rubber stopper side and an infusion container side, and an outer peripheral upper portion of the outer cap is caulked inward. 2. The cap for an infusion container according to claim 1, wherein at least a part of an upper surface of the rubber stopper is covered with a peelable peel seal.