JP4061081B2 - Infusion container plug - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plug body attached to a mouth portion of an infusion container such as an infusion bag used for infusion, for example.
[0002]
[Prior art]
Conventionally, for example, an infusion container 1 such as an infusion bag used for infusion or the like is generally formed into a bag shape by laminating a sheet-like or film-like synthetic resin as shown in FIG. 3, or a tube-like film is formed into a bag shape. A mouth plug 3 made of a soft synthetic rubber or the like is disposed in the end opening of the cylindrical mouth 2 integrally provided by welding or the like on the bag-like infusion container 1, and the mouth In this configuration, the plug 3 is sandwiched between the portion 2 and the peeling cover 4 in a liquid-tight manner.
[0003]
As the material of the plug 3, the vulcanized rubber such as butyl rubber or SBR is generally used, and its JIS hardness is 40 to 55 degrees, the wall thickness is about 4 to 6 mm, and the diameter is about 15 to 20 mm. A cylindrical one is used.
[0004]
The infusion container 1 is pre-filled with a chemical solution, and the mouth plug 3 is punctured with an injection needle or the like as necessary after injection. When injecting a drug solution from the infusion container 1 to the patient, as shown in FIG. 3, the infusion tube 6 made of synthetic resin or the like has a plastic bottle needle 7 or a stainless needle as a puncture needle on the one end side. A so-called infusion set 5 provided with a venous needle (not shown) on the other end side of 6 is used, and the plastic bottle needle 7 or the stainless needle of the infusion set 5 is punctured into the plug body 3 and the inside of the infusion container 1 And the inside of the tube 6 are communicated with each other, and the medicinal solution in the infusion container 1 is administered to the patient by inserting the venous needle into the patient's vein or the like.
[0005]
When a stainless needle is used as the puncture needle, it is necessary to separate the infusion container from the stainless needle when discarding after use, and to discard the stainless needle with a protective cap or the like. Therefore, the disposal process is troublesome, and there is a risk that the needle is accidentally pierced with the finger when the cap is put on the needle.
[0006]
On the other hand, when a plastic bottle needle is used, it is not necessary to separate it from the infusion container. For example, by cutting the middle part of the tube, the plastic bottle needle is discarded while the plastic bottle needle is stuck. There are advantages such as being able to.
[0007]
However, since the outer diameter of the puncture part of the plastic bottle needle is as thick as about 5 to 6 mm, the puncture resistance is large, and a force of about 2 kg / cm ² is required to puncture the plug body with the plastic bottle needle. . In addition, so-called coring in which chips of the plug are mixed into the chemical solution tends to occur. Therefore, it is conceivable to make the plastic bottle needle thin. However, if the plastic bottle needle is made too thin, there is a risk of bending or breaking when the plug body is punctured.
[0008]
On the other hand, in order to reduce puncture resistance, it is conceivable that the hardness of the plug body is, for example, JIS 40 degrees or less, or that the thickness of the plug body 3 is reduced, but in this case, when the plastic bottle needle is punctured The plug body 3 may be deformed by the pressure, or the plug body 3 may fall off. In addition, when the filler is increased in the rubber used to manufacture the plug body, the puncture resistance decreases, but there is a risk that the rubber piece may enter the drug solution as a foreign substance.
[0009]
[Problems to be solved by the invention]
The present invention has been proposed in view of the above problems, and can be easily punctured even when an existing plastic bottle needle is used as the puncture needle, and the mouth plug 3 can be deformed or dropped off. It is an object of the present invention to provide a mouthpiece for an infusion container that can perform an infusion work satisfactorily.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the mouthpiece for an infusion container according to the present invention has the following configuration. That is, a concave portion for inserting a puncture needle is formed on the plug body made of soft synthetic rubber attached to the mouth portion of the infusion container, leaving a thin residual portion thinner than its thickness dimension, and in the concave portion. A bottomed cylindrical guide tube made of a hard synthetic resin for guiding a puncture needle is integrally provided , and the bottom of the guide tube is formed in a conical shape along the bottom surface of the recess .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the mouthpiece for an infusion container according to the present invention will be specifically described based on an embodiment shown in the drawings.
[0012]
FIG. 1 (a) is a longitudinal front view showing one embodiment of a mouthpiece for an infusion container according to the present invention, and FIG. 1 (b) is a bottom view thereof, which is the same as a member having the same function as the conventional example. This will be described with reference numerals.
[0013]
Mouth member 3 of the present embodiment, the one formed in conventional and short cylindrical synthetic rubber soft Similarly, substantially similarly formed with its hardness and thickness and dimensions such as those of the conventional Has been. The mouth plug 3 is disposed in the end opening of the cylindrical mouth 2 integrally provided in the infusion container 1 by welding or the like, as in the conventional example, and the opening 3 and the peeling cover 4 are disposed in the opening. The provided ring-shaped protrusions 2a and 4a are arranged in ring-shaped recesses 3a and 3b formed on the upper and lower surfaces of the plug body 3, and the plug body 3 is sandwiched between the protrusions 4a and 2a. In this configuration, the liquid-tight contact is fixed.
[0014]
The mouth plug 3 is formed with a bottomed circular concave portion 30 for puncture leaving a thin residual portion 31 thinner than its thickness dimension, and a guide tube for guiding a puncture needle in the concave portion 30. The body 10 is provided integrally. If the thickness of the thin residual portion 31 is too thick, the puncture resistance increases, and if it is too thin, it may be damaged unnecessarily, so it is desirable to make it less than half of the total thickness of the plug body 3. Specifically, the overall thickness of the plug body 3 may be about 4 to 7 mm, and the thickness of the thin remaining portion 31 may be about 2 to 3 mm.
[0015]
The guide cylinder 10, in this embodiment obtained by forming a more bottomed cylindrical synthetic resins rigid, the inner diameter of the cylindrical portion 10a, the plastic bottle needle 7 in size can be inserted normally used In this embodiment, the bottom portion 10b is formed in a conical shape along the bottom surface of the concave portion 30. The bottom portion 10b is formed of at least a thickness or material that can be easily punctured with a plastic bottle needle. For example, in the case of a hard synthetic resin, it is preferably about 0.1 to 0.5 mm. In the drawing, reference numeral 10 c denotes a flange portion for retaining the cover integrally provided in the guide cylinder 10.
[0016]
The bottom portion 10b does not necessarily need to be a non-porous film. For example, a crack may be formed in the bottom portion 10b so that the bottom portion 10b opens when a plastic bottle needle enters, and when the plastic bottle needle is pulled out, the bottom portion 10b may be closed by the pressure of surrounding rubber . Is found in the recess 30 and the guide cylinder 10, in the present embodiment is provided three each at substantially equal intervals as in the circumferential direction of the Kuchisentai 3 shown in FIG. 1 (b), the number and arrangement The configuration and the like are appropriate.
[0017]
The material and molding method of the plug body 3 and the guide cylinder 10 are appropriate, but can be easily mass-produced by, for example, molding by injection molding or the like. In this case, as the material of the plug 3, for example, a styrene-butadiene type, a styrene-isoprene type that can be injection-molded, or a resin that is hydrogenated to them can be used. Alternatively, a synthetic rubber such as SBR or IR may be hot press molded. Moreover, as the guide cylinder 10, synthetic resins, such as polyethylene and a polypropylene, can be used, for example.
[0018]
Further, the molding procedure and the like of the concave portion 30 and the guide cylinder 10 are appropriate. For example, the guide cylinder 10 is formed in advance, and is inserted into the molding die when the plug body 3 is molded. Mold. Alternatively, the guide cylinder 10 is formed in a split mold, and the plug 3 is continuously formed by replacing the other split mold while leaving the guide cylinder 10 in one of the split molds. Is also possible. Further, for example, after the plug body 3 having the concave portion 30 is formed in advance, the guide cylinder 10 formed by injection molding or the like may be inserted and fixed in the concave portion. Others are appropriate, such as engagement, adhesion, or welding.
[0019]
When the plastic bottle needle 7 is punctured into the plug body 3 configured as described above, the tip of the plastic bottle needle 7 is inserted into the recess 30 of the plug body 3 as shown in FIG. What is necessary is just to make it contact | abut to the bottom part 10b of the cylindrical body 10, and to push in in the opening part 2 like the figure (b) in the state. At that time, since the guide cylinder 10 is provided in the recess 30, the plastic bottle needle 7 can be easily inserted into the recess 30 with almost no resistance using the guide cylinder 10 as a guide, In the present embodiment, the bottom 10b of the guide cylinder 10 is very thin, or there is a crack in the bottom, and the thin residual portion 31 is thinner than the entire thickness of the plug 3, so that it can be easily punctured with a small force. be able to.
[0020]
In the state where the plastic bottle needle 7 is inserted as shown in FIG. 2B, the thin residual portion 31 is expanded and the thin residual portion 31 is caused to be elastic by its elastic restoring force. This prevents the drug solution in the infusion container 1 from leaking from between the mouth plug 3 and the plastic bottle needle 7 to the outside. Moreover, the plastic bottle needle 7 is retained by the elastic restoring force of the plug 3 and can be prevented from inadvertently falling off. Further, when the bottom 10b is provided on the guide cylinder 10 as in the above embodiment, the resistance when the plug 3 is punctured with the plastic bottle needle 7 is slightly increased, but the plastic bottle needle 7 is supported by the supporting force of the bottom 10b. It is possible to more reliably prevent the falling off.
[0021]
【The invention's effect】
As described above, since the mouthpiece for an infusion container according to the present invention has the above-described configuration, the plastic bottle needle 7 can be easily inserted using the guide cylinder 10 provided in the recess 30 of the mouthpiece 3 as a guide. In addition, since the thin residual portion 31 that is thinner than the thickness of the plug body 3 may be punctured, the puncture resistance is small and even a conventional plastic bottle needle can be punctured easily with a small force. . In addition, since the puncture resistance is small as described above, it is possible to puncture without bending or breaking even if the outer diameter of the conventional plastic bottle needle is smaller. Further, the tip of the plastic bottle needle does not necessarily have to be sharp as in the conventional product, as long as at least the thin residual portion 31 can be punctured and has a shape and material that can be liquid-tightly inserted and fitted. Since it is good, there is an effect that the degree of freedom in selecting the shape and material of the plastic bottle needle can be greatly increased.
[Brief description of the drawings]
FIG. 1A is a longitudinal front view showing one embodiment of a mouthpiece for an infusion container according to the present invention.
(B) is a plan view thereof.
FIGS. 2A and 2B are explanatory views showing a state in which a plastic bottle needle is punctured into the mouth plug. FIG.
FIG. 3 is a partially longitudinal front view showing an example of a conventional infusion container and infusion set.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Infusion container 2 Mouth part 3 Plug body 30 Recessed part 31 Thin residual part 4 Peeling cover 5 Infusion set 6 Infusion tube 7 Plastic bottle needle 10 Guide cylinder 10a Tube part 10b Bottom

Claims (2)

  A mouthpiece made of soft synthetic rubber attached to the mouth of the infusion container forms a recess for inserting a puncture needle, leaving a thin residual portion thinner than its thickness, and a puncture needle in the recess A mouth for an infusion container characterized in that a bottomed cylindrical guide cylinder made of a hard synthetic resin for guide is provided integrally, and the bottom of the guide cylinder is formed in a conical shape along the bottom surface of the recess. Plug body.   The mouthpiece for an infusion container according to claim 1, wherein the bottom of the guide cylinder is formed to a thickness of 0.1 to 0.5 mm.

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