JP2002177365A - Stopper with check valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stopper with a check valve constituted so as to suck a liquid from a drug bottle only by a syringe main body without using an injection needle to enable the injection of the liquid in a mixing injection pipe. SOLUTION: The stopper 1 is fitted to the opening part 6 of the drug bottle or mixing injection pipe and can suck and inject the liquid using only the syringe main body 10. This stopper consists of a stopper main body 2 having an insertion hole part 7, in which the small diameter pipe part 1 of the syringe main body 10 is inserted, formed to the central part thereof and a membrane- like check valve 3 for opening and closing the lower end opening part 71 of the insertion hole part 7 and, at the time of terminal of the insertion operation of the small diameter pipe part 11 of the syringe main body 10 to the insertion hole part 7, the check valve 3 is forcibly opened by the leading end of the small diameter pipe part 11 to form a liquid flow passage allowing the interior of the opening part 6 to communicate with the small diameter pipe part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper which is hermetically attached to an opening of a vial or a co-infusion tube for injecting and sucking a liquid by using only a syringe body. The present invention also relates to a plug with an on-off valve that can inject and suck liquid.

[0002]

2. Description of the Related Art Generally, medicine bottles and co-infusion tubes are used for injecting and sucking a liquid using a syringe. The medicine bottle hermetically seals the medicinal solution by fitting a rubber stopper into the opening, and means for taking out the medicinal solution from the medicine bottle pierces the rubber stopper with a syringe needle and sucks it. The co-infusion tube is a T-shaped tube in which a branch tube is extended from a side surface of a linearly formed tube main body, and is incorporated in a liquid circuit such as an infusion circuit or a blood circuit to inject a drug solution. That is, in the co-infusion tube, the rubber tube of the liquid circuit is connected to both ends of the tube main body, and a rubber stopper is fitted in the opening of the branch tube, and the injection needle of the syringe is pierced into the rubber stopper of the co-infusion tube. Then, the liquid medicine is injected into the liquid circuit. When a rubber stopper is fitted to the opening of a medicine bottle, co-infusion tube, etc.
A syringe needle must be used for blotting.

[0003]

However, there is a possibility that a patient's blood or drug may adhere to a needle used at a medical site, and there is a problem with its disposal and misuse of a used needle. Caused hospital-acquired infections. Regarding the disposal of the injection needle, manuals and the like are prepared and strictly managed, so that it is very troublesome. Furthermore, once used needles need to be disposed of, which has been a factor in increasing medical costs.

The inventor of the present invention has used an injection needle other than direct injection of a drug solution into a patient's body by using a syringe, ie, taking out a drug solution from a vial and injecting the drug solution into an infusion circuit or an infusion circuit. Attention is paid to the fact that an injection needle is used when performing the method, and the present invention is proposed from the viewpoint of reducing the use of the injection needle as much as possible.

Although the present invention will be described with reference to a case where only a syringe body is used without using a syringe needle, the present invention can also be applied to sucking and injecting a liquid by a connector in the same procedure, and a description thereof will be omitted.

[0006] That is, an object of the present invention is to provide a stopper with an on-off valve, which is capable of sucking liquid from a vial and injecting liquid into a co-infusion tube by using only a syringe body without using an injection needle. It is.

[0007]

In order to achieve the above object, a plug with an on-off valve according to claim 1 of the present invention is fitted airtightly into an opening of a medicine bottle or an opening of a branch pipe of a co-infusion tube. A stopper body for sucking or injecting liquid using only the syringe body, wherein a stopper body formed at a central portion thereof has an insertion hole into which a small-diameter tube portion of the syringe body is airtightly inserted; And a film-like on-off valve for opening and closing the lower end opening of the syringe unit. At the end of the operation of inserting the small-diameter tube of the syringe body into the insertion hole, the on-off valve is pushed and opened by the tip of the small-diameter tube of the syringe body. A liquid flow path communicating the inside of the opening with the small diameter tube of the syringe body.

In other words, the plug with an opening / closing valve according to the present invention is a plug that fits into an opening of a vial, a co-infusion tube, or the like. In order to be able to suck and inject liquid, an insertion hole for inserting the small-diameter tube of the syringe body is formed in the center of the stopper body, and the lower end opening of the insertion hole can be opened and closed with an on-off valve. I have to.

The plug with an on-off valve according to the second aspect is the first aspect.
The plug body with an on-off valve according to claim 1, wherein the plug body has an insertion hole into which a small-diameter tube portion of a syringe main body is inserted at a central portion, and an enlarged-diameter hole continuous with the insertion hole. By forming the lower end opening of the portion so as to protrude into the enlarged diameter hole, the on-off valve can be stretched in the enlarged diameter hole so as to close the lower end opening of the insertion hole with a predetermined tightening pressure. .

According to a third aspect of the present invention, there is provided a plug with an on-off valve.
Or in the closure with an on-off valve according to 2, wherein the closure body is
The outer fitting member fits into the opening and the inner fitting member fits into the outer fitting member, so that the outer fitting member and the inner fitting member can be made of different materials.

According to a fourth aspect of the present invention, there is provided a plug with an on-off valve.
In order to prevent the insertion hole portion from elastically contracting and hindering the insertion operation of the small-diameter tube portion of the syringe body, the inner fitting member is made of a rigid material such as a synthetic resin in the plug with the on-off valve according to the above. Can be.

According to a fifth aspect of the present invention, there is provided a plug with an on-off valve.
In the plug with an opening / closing valve according to any one of the above-described items 4, the inner diameter of the insertion hole is partially reduced in diameter so that the small-diameter tube of the syringe body is securely sealed.

According to a sixth aspect of the present invention, there is provided a plug with an on-off valve.
In the plug with an on-off valve according to any one of claims 1 to 4, the inner peripheral portion of the insertion hole portion is formed so as to correspond to the outer shape of the small-diameter tube portion of the syringe main body, thereby securely sealing the small-diameter tube portion of the syringe main body. I did it.

According to a seventh aspect of the present invention, there is provided a plug with an on-off valve.
In the plug with an on-off valve according to any one of to 3, the on-off valve comprises a sheet-like film portion made of an elastic material, and a pedestal portion formed on an upper surface portion of the sheet-like film portion, The sheet-shaped membrane portion is stretched so as to close the lower end opening of the insertion hole of the small diameter tube portion of the syringe body of the stopper main body with a predetermined tightening pressure, and from the closed portion of the lower end opening of the insertion hole. A liquid passage window is formed on the outside, and the pedestal is formed so that the small-diameter tube of the syringe body is not closed.

The on-off valve is elastically pushed at the end of the operation of inserting the small-diameter tube portion of the syringe body into the insertion hole by making the sheet-like membrane portion made of an elastic material. The inside communicates with the small diameter pipe of the syringe body,
Also, when the small-diameter tube portion of the syringe body is pulled out from the insertion hole, the on-off valve is elastically restored so that the lower end opening of the insertion hole can be closed.

A liquid passage window serving as a liquid flow path is formed at or near the outer edge of the sheet-like membrane portion, that is, outside the closed portion of the lower end opening of the insertion hole.

The pedestal portion is formed at the center of the upper surface of the sheet-like membrane portion so as not to close the tip of the small-diameter tube portion when pushing the open / close valve with the small-diameter tube portion of the syringe body. . For example, the shape of the pedestal portion is a disk body having a larger diameter than the small diameter tube portion of the syringe body, a concave groove formed over the entire width on the upper surface of the disk body, or the diameter of the small diameter tube portion of the syringe body. If the rectangular body is long and the width is smaller than the diameter of the small-diameter tube, the tip of the small-diameter tube of the syringe body contacts the upper surface of the pedestal portion. The tip is not occluded.

The plug with an opening / closing valve according to claim 8 is a plug which is fitted into an opening and is capable of sucking and injecting liquid using only the syringe body, wherein the stopper is a syringe body. A plug body having an insertion hole at the center for inserting the small-diameter pipe portion in an airtight state, and an on-off valve for opening and closing a lower end opening of the insertion hole with a predetermined tightening pressure, wherein the plug body has an opening. And an inner fitting member that fits into the outer fitting member and has an insertion hole at the center for inserting the small-diameter tube portion of the syringe main body. A plate-shaped membrane portion for opening and closing the lower end opening of the insertion hole of the small-diameter tube portion of the syringe body of the fitting member, and an upper surface of the plate-shaped membrane portion so that the small-diameter tube portion of the syringe body is not closed. The pedestal portion formed in the portion, comprises a plurality of string-shaped suspensions made of elastic material, the string-shaped suspension is Part is connected to the outer edge of the plate-shaped membrane part, and the upper end is connected to the upper end of the inner surface of the outer fitting member, and the lower end opening of the insertion hole of the small-diameter tube part of the syringe body is subjected to a predetermined tightening pressure. The plate-shaped membrane portion is suspended so as to be closed, and the plate-shaped membrane portion is pressed against the insertion hole by the elastic force of the string-shaped hanging portion.

According to a ninth aspect of the present invention, there is provided a plug with an on-off valve.
The on-off valve-equipped plug according to claim 1, wherein the on-off valve makes the elastic force of at least one of the plurality of string-shaped suspensions greater than that of the other string-shaped suspensions, and At the end of the insertion operation of the insertion hole of the small-diameter tube portion, the plate-like membrane portion is rotated about the lower part of the string-shaped suspension having a large elastic force as a center of rotation to open the insertion hole. And

According to a tenth aspect of the present invention, there is provided a plug with an on-off valve which is fitted into an opening and is capable of sucking and injecting liquid using only a syringe body. A plug body having an insertion hole at the center for inserting the small-diameter tube in an airtight state, and an open / close valve for opening and closing a lower end opening of the insertion hole, wherein the plug body fits into the opening. And an inner fitting member having an insertion hole into which the small-diameter tube portion of the syringe body is inserted at the center thereof, wherein the on-off valve is a cup-shaped member made of an elastic material. A film portion and a pedestal portion formed on the bottom upper surface of the cup-shaped film portion. The cup-shaped film portion is fitted on the inner fitting member and the entire upper periphery is entirely covered with the upper part of the outer fitting member. It is connected to the inner peripheral edge, and the small-diameter tube portion of the syringe body of the inner fitting member is inserted at the bottom inner surface of the cup-shaped membrane portion. The lower end opening of the portion is closed with a predetermined tightening pressure, and a pedestal portion is formed so as not to block the small diameter tube portion of the syringe body, and a plurality of cup-shaped membrane portions are provided on the entire peripheral surface. A liquid passage window is formed.

The plug with an on-off valve according to claim 11 is the plug-on with an on-off valve according to claim 10, wherein the width between the liquid passage windows of the cup-shaped membrane portion is narrowed to form an adjacent passage. A string-shaped part is provided between the liquid window part.

According to a twelfth aspect of the present invention, in the plug with the on-off valve according to the tenth aspect, a thick ring-shaped outer fitting member in which the plug body is fitted into the opening, and an outer fitting member. A lower portion protruding from the outer fitting member in a state fitted to the inner fitting member, and a cup-shaped film portion made of an elastic material to be fitted with a protruding portion of the inner fitting member protruding from the outer fitting member; A thick ring-shaped outer fitting member and a cup-shaped membrane are integrally formed, and a lower end opening of the insertion hole of the small-diameter tube portion of the syringe body of the inner fitting member is formed on the inner surface of the bottom of the cup-shaped membrane. It is closed by tightening pressure, so that the pedestal part formed on the bottom upper surface does not close the small diameter tube part of the syringe main body, and a plurality of liquid passage windows are formed on the peripheral surface of the cup-shaped membrane part It is characterized by having done.

According to a thirteenth aspect of the present invention, in the plug with the on-off valve according to the tenth aspect, the plug body includes a thick ring-shaped outer fitting member fitted into the opening, An inner fitting member having a lower portion protruding below the outer fitting member in a state fitted to the fitting member, and a band-shaped film portion made of an elastic material partially covering a projecting portion of the inner fitting member projecting from the outer fitting member The thick ring-shaped outer fitting member and the band-shaped membrane are integrally formed, and the opening at the tip end of the insertion hole of the small-diameter tube portion of the syringe body of the inner fitting member is formed on the bottom inner surface of the band-shaped membrane. Is closed with a predetermined tightening pressure, so that the small-diameter tube portion of the syringe main body is not closed by the pedestal portion formed on the bottom upper surface, and both side surfaces of the band-shaped membrane portion are formed as liquid passage windows. It is characterized by the following.

According to a fourteenth aspect of the present invention, in the plug with the on-off valve according to the tenth aspect, the plug body includes a thick ring-shaped outer fitting member fitted into the opening, An inner fitting member having a lower portion protruding below the outer fitting member in a state fitted to the fitting member, and a cup-shaped film portion made of an elastic material covering a protruding portion of the inner fitting member from the outer fitting member. The thick ring-shaped outer fitting member and the cup-shaped film portion are integrally formed, and a plurality of through holes are formed at the bottom of the cup-shaped film portion and at the annular portion in contact with the annular distal end surface of the inner fitting member. A liquid hole is formed, and the annular portion of the cup-shaped membrane portion having the liquid hole formed therein is pressed against the annular distal end surface of the inner fitting member with a predetermined tightening pressure, and the cup is formed at the annular distal end surface of the inner fitting member. The plurality of liquid holes provided in the membrane-like portion are closed, and the base of the syringe is held by the pedestal portion provided on the bottom surface of the cup-like portion. It characterized in that as not to occlude the small diameter tube portion.

According to a fifteenth aspect of the present invention, in the plug with the on-off valve according to any one of the tenth, twelfth, and thirteenth aspects, a pedestal formed on a bottom upper surface of the cup-shaped membrane is provided. It is characterized by comprising a disc formed of a plastic material and a pedestal integrally formed on the disc.

According to a sixteenth aspect of the present invention, there is provided a plug with an on-off valve according to any one of the first, third, eighth, tenth and twelfth aspects. A lid is fitted into the upper end opening of the insertion hole of the small-diameter tube, the lid is formed of an elastic material, and a cross-shaped breaking groove is provided on one surface.

According to a seventeenth aspect of the present invention, there is provided a plug body with an on-off valve according to any one of the third and twelfth aspects, wherein the plug body with an on-off valve is prevented from falling off. An engagement groove is formed in the hole, and a locking projection corresponding to the engagement groove is formed in a small-diameter tube portion of the syringe body.

[0028]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a plug with an on-off valve according to the present invention.

FIG. 1 shows a plug 1 with an on-off valve according to a first embodiment of the present invention, wherein FIG. 1A is a plan view, and FIG. 1B is a plan view of FIGS. ) Is a sectional view taken along the line AA, FIG. 2C is a bottom view, FIG. 2 is an enlarged view of FIG. 1B, FIG. 3 is an enlarged view of the on-off valve 3, and FIG. 4 (B) is a sectional view taken along line AA of FIG. 4 (A), and FIG. 4 is an explanatory view of the operation of the plug 1 with an on-off valve.

As shown in FIG. 1B and FIG. 2, the plug with on-off valve 1 comprises a plug body 2, an on-off valve 3, a lid 4, and a covering member 5, and comprises a medicine bottle and a co-infusion tube. Is airtightly mounted in the opening 6 to allow the inside and outside of the medicine bottle and the co-infusion tube to communicate with each other and shut off.

The stopper body 2 is made of an elastic material such as rubber, and is fitted into the opening 6 of a medicine bottle or a co-infusion tube as shown in FIGS. The insertion hole 7 and the enlarged diameter hole 8 of the small-diameter tube portion 11 (FIG. 4) of the main body 10 are formed, and a flange portion 9 is formed on the outer peripheral portion of the upper end toward the outside.

The insertion hole 7 is a portion into which the small-diameter tube portion 11 (FIG. 4) of the syringe body 10 is inserted, and a fitting portion 12 into which the lid 4 is fitted is formed at the upper inner edge. The peripheral portion is partially reduced in diameter to seal the outer peripheral surface of the small-diameter tube portion 11, and the lower end opening 7 a is closed by the on-off valve 3.

The lower end opening 7a of the insertion hole 7 protrudes into the enlarged diameter hole 8, and the on-off valve 3 is stretched to close the lower end opening 7a of the insertion hole 7. In the state shown in FIGS. 1 and 2, the lower end opening 7a of the insertion hole 7 is closed by the on-off valve 3 with a predetermined tightening pressure, and the on-off valve 3 extends the insertion hole 7 and the medicine bottle or the co-infusion tube. The diameter hole 8 is closed.

The flange portion 9 is provided at the upper end surface of the opening 6 to prevent the plug body 2 from entering the inside of the opening 6 when the stopper main body 2 is fitted into the opening 6 such as a medicine bottle. The plug body 2 extends outward from the upper end of the outer periphery of the plug body 2 so that the stopper body 2 can be locked. An annular rib 13 for sealing the upper end surface of the opening 6 is formed on the lower surface side of the flange portion 9 so that the liquid in the vial can pass through the outer peripheral portion of the stopper body 2 and the opening 6.
To prevent leakage from between the inner peripheral portion and the inner peripheral portion. still,
The annular rib 13 may be formed separately from a material different from that of the plug body 2. In this case, it is preferable to form a groove on the lower surface side of the flange portion 9 in which the annular rib 13 can be fitted.

In the present embodiment, an example in which there is a small gap between the outer peripheral portion of the plug body 2 and the inner peripheral portion of the opening 6 has been described. The outer diameter of the plug body 2 is made of an elastic material such as rubber so that the outer diameter of the plug body 2 is slightly larger than the inner diameter of the opening 6 to such an extent that the plug body 2 is elastically deformable and can be screwed into the opening 6. You may.

As shown in FIG. 3, the on-off valve 3 includes a sheet-like film portion 14 made of an elastic material such as rubber, and a pedestal portion 15 formed at the center of the upper surface of the sheet-like film portion 14. It is composed of The sheet-like membrane portion 14 is stretched inside the enlarged diameter hole 8 so as to close the lower end opening 7 a of the insertion hole 7 of the plug body 2, and from the closed portion of the lower end opening 7 a of the insertion hole 7. A liquid passage window 16 is formed on the outside. The pedestal portion 15 is formed with a concave groove portion 17 over the entire width from the upper surface portion to the bottom portion of the disk body, and is accommodated in the lower end opening 7a of the insertion hole portion 7 and is inserted into the insertion hole portion 7. The diameter is larger than the distal end opening 11a (FIG. 4) of the small diameter tube portion 11 of the main body 10. That is, the pedestal portion 15 may be other than the illustrated one as long as the small-diameter tube portion 11 of the syringe body 10 inserted into the insertion hole portion 7 is formed so as not to be closed. May be replaced by a rectangular base (not shown). The rectangular base portion has a length longer than the diameter of the small-diameter tube portion 11 of the syringe main body 10 and shorter than the diameter of the lower end opening 7a of the insertion hole 7.
If the width is smaller than the diameter of the small diameter tube portion 11 of the syringe body 10, the small diameter tube portion 11 of the syringe body 10 can be prevented from being closed.

In the on-off valve 3, the sheet-shaped membrane portion 14 and the pedestal portion 15 may be integrally formed of an elastic material such as rubber, or the pedestal portion formed separately from the sheet-shaped membrane portion 14. Fifteen
May be integrated by means such as adhesion or welding. In the latter case, the material of the pedestal portion 15 does not need to be limited to an elastic material such as rubber, and may be an inelastic synthetic resin or the like as long as it is hard enough to easily pierce the injection needle 18 (FIG. 5). .

As shown in FIGS. 1B and 2, the lid 4 has a fitting portion 1 formed at an upper end opening of the insertion hole 7.
2 to prevent dust from entering the insertion hole 7. As a matter of course, when inserting the small-diameter tube portion 11 of the syringe main body into the insertion hole 7, the lid 4 is removed from the fitting portion 12 of the plug main body 2. Further, the lid 4 may be pivotally attached to the plug body 2 or the covering member 5, or the lid body 2
Or a member manufactured separately from the covering member 5.
It is desirable that it is the same size as the shape of No. 2. If an appropriate handle (not shown) is formed on the upper surface of the lid 4,
The lid 4 can be easily removed from the fitting portion 12.

As shown in FIGS. 1 and 2, the covering member 5 is made of a metal such as aluminum which is a plastic material or a synthetic resin which is a thermoplastic material. Is what you do. When the flange 9 is pressed against the upper end surface of the opening 6 to such an extent that the annular rib 13 is elastically deformed, the annular rib 13 comes into airtight contact with the upper end surface of the opening 6 and the plug body 2 Liquid can be reliably prevented from leaking from between the outer peripheral portion of the first opening and the inner peripheral portion of the opening 6.

Next, the operation of the plug with on-off valve 1 according to the first embodiment will be described with reference to FIG. First, the plug with on-off valve 1
After the lid 4 is removed from the syringe body 1, the syringe body 1 is inserted into the insertion hole 7.
0 small-diameter tube part 11 is inserted. At the end of the inserting operation of the small-diameter tube portion 11, the seat portion 15 of the on-off valve 3 is pushed by the tip portion 11a of the small-diameter tube portion 11 so that the sheet-like membrane portion 14 of the on-off valve 3 and the insertion hole 7 are formed. The lower end opening 7a can be elastically separated. As a result, a liquid flow path (dashed line in FIG. 4) that connects the small-diameter tube portion 11 of the syringe body 10 and the inside of the opening 6 is formed.

For example, the liquid flow path for injecting a liquid from the opening 6 is as shown by a chain line in FIG.
0, the small-diameter pipe portion 11, the concave groove portion 1 of the pedestal portion 15 of the on-off valve 3.
7, a gap between the sheet-like membrane portion 14 of the on-off valve 3 and the lower end opening 7a of the insertion hole 7, the liquid passage window 16 of the on-off valve 3, and the inside of the opening 6. Further, the liquid flow path when sucking the liquid from the opening 6 is only in the reverse order of the liquid flow path when injecting the liquid, and thus the description is omitted. In addition, the opening 6 of the medicine bottle
When the liquid is sucked from the opening 6, the opening 6 may be directed downward so that the liquid is filled in the enlarged diameter hole 8.

Further, since the inner peripheral surface of the insertion hole 7 is formed to have a partially reduced diameter, when the small diameter tube of the syringe body is inserted into the insertion hole 7, the outer diameter of the small diameter tube 11 is reduced. Surface can be sealed. Therefore, when injecting and sucking the liquid, it is possible to prevent liquid leakage from between the small-diameter tube portion 11 of the syringe body 10 and the insertion hole 7.

As described above, the plug with on-off valve 1 according to the first embodiment sucks or co-injects liquid from the opening 6 such as a medicine bottle by using only the syringe body 10 without using a syringe needle. Liquid can be injected through the opening 6 of the tube.

Further, the plug 1 with an on-off valve according to the first embodiment.
As shown in FIG. 5, since the on-off valve 3 is made of a material that can pierce the injection needle 18 like a conventional rubber stopper or the like, suction and injection of the drug solution can be performed by the syringe 19 to which the injection needle 18 is attached. I can do it. In FIG. 5, the lid 4 is also made of a material that can be pierced by the injection needle 18.

FIG. 6 shows a plug 1 with an on-off valve according to a first modification of the first embodiment. In the plug with on-off valve 1 according to this modification, as shown in FIG. 6, the inner peripheral surface shape of the insertion hole 7 is formed corresponding to the shape (tapered shape) of the small-diameter tube portion 11 of the syringe body 10. And the plug main body 2 is different from the first embodiment in that the plug main body 2 includes an outer fitting member 20 and an inner fitting member 21. In other respects, the plug with an on-off valve according to the first embodiment is different. Since it is the same as the body 1, the same portions are denoted by the same reference numerals and description thereof will be omitted.

That is, in the plug 1 with the on-off valve according to the modification shown in FIG. 6, the insertion hole 7 is inserted into the small-diameter tube 1 of the syringe body 10.
1 (tapered shape), the small diameter tube portion 11 of the syringe body 10 can be reliably sealed,
Further, it is possible to prevent the on-off valve 3 from being damaged by excessively inserting the small-diameter tube portion 11 into the insertion hole portion 7.

The plug body 2 includes an outer fitting member 20 fitted into the opening 6 and an inner fitting member 21 fitted into the outer fitting member 20. The outer fitting member 20 has a fitting hole 22 into which the inner fitting member 21 is fitted, and a diameter-enlarging hole 8 continuous with the fitting hole 22, and the inner fitting member 21 is located at the center thereof.
0 having a small-diameter tube portion 11 for insertion.
With the inner fitting member 21 inserted into the outer fitting member 20, the distal end of the inner fitting member 21 projects into the enlarged diameter hole 8 of the outer fitting member 20.

That is, in the plug 1 with an on-off valve, the plug body 2 is divided into an outer fitting member 20 and an inner fitting member 21 so that the outer fitting member 20 and the inner fitting member 21 are made of different materials. it can. For example, the outer fitting member 20 can be made of an elastic material such as rubber, and the inner fitting member 21 can be made of a rigid material such as a synthetic resin. In this case, it is possible to prevent the outer fitting member 20 from being elastically contracted, and following this, the insertion hole portion 7 of the inner fitting member 21 from being elastically contracted. That is, if the diameter of the insertion hole 7 shrinks, the operation of inserting the small-diameter tube 11 of the syringe body 10 into the insertion hole 7 is hindered. Therefore, it is desirable that the inner fitting member 21 be made of a rigid material such as a synthetic resin. . In addition, synthetic resin has lower reactivity to chemicals than rigid materials such as metal, and is lightweight and inexpensive.
Is suitable as a material for the above.

An annular concave portion 23 and an annular convex portion 24 are formed in the fitting hole 22 of the outer fitting member 20 and the outer surface of the inner fitting member 21 so as to be engaged with each other. The combined inner fitting member 21 has the function of preventing the inner fitting member 21 from coming off.

FIG. 7 shows a plug with an on-off valve 1 according to a second modification of the first embodiment, which is substantially the same as the plug with an on-off valve according to the second modification. Therefore, the same portions are denoted by the same reference numerals, and description thereof will be omitted. In FIG.
Is composed of a cylindrical outer fitting member 20 fitted to the opening 6 and an inner fitting member 21 fitted to the outer fitting member 20. The inner fitting member 21 has an insertion hole 7 at the center thereof for inserting the small diameter tube portion 11 of the syringe body 10, and the inner fitting member 21 and the outer fitting member 20 An enlarged diameter hole 8 is formed between them.

The on-off valve 3 has a pedestal portion 15 which is fitted into the insertion hole 7 at a central portion, and a liquid passage window portion 1 is provided on the outer peripheral edge.
The entire periphery of the sheet-like film portion 14 having the
No. 0 is welded or bonded to the upper part of the inner peripheral surface. That is, the pedestal 15 at the center is stretched into the insertion hole 7 so as to be fitted with a predetermined tightening pressure. When the small-diameter tube 11 of the syringe main body 10 is inserted into the insertion hole 7 on the upper surface of the pedestal 15,
The groove 17 is formed so that the small-diameter tube 11 is not closed. The state of the chain edge shows a state in which the sheet-like membrane portion 14 is opened by the small-diameter tube portion 11 of the syringe main body 10.

FIGS. 8 and 9 show a plug 1 with an on-off valve according to a second embodiment of the present invention. The plug 1 with an on-off valve differs from the first embodiment in the structure of the on-off valve 3, and is otherwise the same as the plug 1 with the on-off valve according to the embodiment. Are denoted by the same reference numerals, and description thereof is omitted. FIG. 8 shows a case in which the plug with on-off valve 1 is attached to the opening 6 of the mixed injection tube.

The inner fitting member 21 constituting the plug body 2 of the plug with on-off valve 1 according to the second embodiment has a flange portion 25 which is engaged with the upper end surface of the outer fitting member 20, and the flange portion 25 is formed. 25 has a protrusion 26 formed on the upper end surface of the outer fitting member 20.
Is formed. The outer shape of the outer fitting member 20 is formed in a shape corresponding to the inner shape of the opening 6.

The on-off valve 3 of the on-off valve equipped plug 1 is
As shown in FIG. 9, the inner fitting member 21 includes a plate-shaped film portion 28 for closing the lower end opening 7 a of the insertion hole 7, a pedestal portion 29, and a string-shaped hanging portion 30. The plate-like film portion 28 may be made of a rigid material such as a synthetic resin, unlike the other embodiments described above, and a pedestal portion 29 is formed at the center of the upper surface. However, in the case where the plate-like film portion 28 is made of a rigid material, a sheet made of an elastic material is stretched in a portion that comes into contact with the lower end opening 7a of the inner fitting member 21 so that the lower end opening 7a in the closed state and the plate It is necessary to ensure confidentiality with the film-like portion 28. The pedestal part 29 has a cross-shaped groove 3 in a truncated conical body.
1 and is formed so as not to close the small-diameter tube portion 11 of the syringe body 10 as in the other embodiments described above. Four string-shaped hanging portions 30 made of an elastic material such as rubber are connected to the outer edge of the plate-shaped film portion 28 at equal intervals.

As shown in FIGS. 8A and 8B, one end of the string-shaped hanging portion 30 is connected to the outer edge of the plate-like film portion 28, and the other end is connected to the outer fitting member 20. By connecting to the upper end of the inner peripheral surface, the elastic force of the inner peripheral surface allows the plate-shaped film portion 28 to be inserted into the lower end opening 7a of the insertion hole 7 of the inner fitting member 21 as shown in FIG. Airtight contact is made with the tightening pressure.

As shown in FIG. 8 (B), the small-diameter tube portion 11 of the syringe body 10 is inserted into the insertion hole 7 and the plate of the on-off valve 3 is terminated at the end of the insertion operation. The film-like portion 28 is pushed in through the pedestal portion 29, and the lower end opening 7 a of the insertion hole 7 and the opening 6 communicate with each other through the gap 32 between the cord-shaped hanging portions 30. That is, the liquid passage window of the on-off valve 3 in the second embodiment is formed by the gap 32 between the cord-shaped hanging portions 30.

The plug with on-off valve 1 shown in FIG.
Is a modification of the second embodiment shown in FIG. 1, in which one string-shaped suspension 30a of four string-shaped suspensions 30 of the on-off valve 3 has a larger elastic force than the other string-shaped suspensions 30. The difference is that a pedestal portion is not formed on the plate-shaped film portion 28. This on-off valve 3 is shown in FIGS.
As shown in FIG. 3, a plate-shaped film portion 28 made of a rigid material such as a synthetic resin, three string-shaped hanging portions 30
And a string-shaped hanging portion 30a. That is, when the small-diameter tube portion 11 of the syringe body 10 is inserted into the insertion hole portion 7 and the on-off valve 3 is pushed, the plug 1 with the on-off valve
As shown in (B), since the elastic force of the string-shaped hanging portion 30a is large, it is hard to expand as compared with the other string-shaped hanging portions 30, and the lower end portion 30a 'of the string-shaped hanging portion 30a becomes the center of rotation and becomes plate-shaped. Is rotated to form a liquid flow path indicated by an arrow.

FIGS. 11 and 12 show a third embodiment.
(A) and (B) are different from the second embodiment in that the on-off valve 3 is constituted by the cup-shaped membrane portion 33 shown in FIG. As shown in FIG. 11A, the cup-shaped film portion 33 has a shape covering the outer peripheral surface portion 21a and the lower end opening portion 7a of the inner fitting member 21 of the plug body 2, and is formed of an elastic body. A pedestal portion 29 similar to that of the on-off valve 3 of the other embodiment is provided on the upper surface of the bottom portion 34 of the cup-shaped film portion 33. A plurality of liquid passage windows 36 are formed in an upper portion. As shown in FIG. 12A, the cup-shaped film portion 33 is
The entire periphery of the upper part is bonded or welded to the inner periphery of the upper part of the outer fitting member 20 in a state of being fitted to the outer member 20. FIG. 12B shows that the small-diameter tube portion 11 of the syringe body 10 is
In the drawing, the cup-shaped membrane portion 33 is extended downward through the pedestal portion 29 in association with the insertion operation of the small-diameter tube portion 11, and the liquid passage window portion 36 is shown. Is extended to a position below the lower end opening 7a of the insertion hole 7 of the inner fitting member 21. As a result, the small-diameter tube portion 11 of the syringe body 10 is
A liquid flow path indicated by an arrow connecting the opening and the opening 6 is formed, and the liquid can be injected. As shown in FIG. 11B, when the interval between the liquid passage windows 36 of the cup-shaped thin film portion 33 is reduced, the portion between the adjacent liquid passage windows 36 becomes a string-shaped hanging portion, The same effect as the on-off valve 3 of the second embodiment is exerted.

FIG. 13 shows a first modification of the third embodiment, in which the stopper body 2 is fitted into the opening 6 of the co-infusion tube, and a cup-shaped membrane portion 37 extending downward from the inner peripheral edge is integrated. And the thick ring-shaped outer fitting member 38 and the thick ring-shaped outer fitting member 38, the lower half of which protrudes downward from the outer fitting member 38. The inner fitting member 39 is covered. The thick ring-shaped outer fitting member 38 and the cup-shaped film portion 37 are integrally formed of an elastic material. A pedestal portion 40 is provided on the inner surface of the bottom of the cup-shaped membrane portion 37 so as not to close the small-diameter tube portion 11 of the syringe body 10, and a plurality of liquids are passed through the peripheral side surface of the cup-shaped membrane portion 37. The window 41 is formed.

FIG. 13A shows a state in which the on-off valve 3 closes the lower end opening 7a of the insertion hole 7, and FIG.
Inserts the small-diameter tube portion 11 of the syringe main body 10 into the insertion hole portion 7 and extends the cup-shaped membrane portion 37 downward through the pedestal portion 40, and the liquid passage window portion 41 is opened to open the fluid path as indicated by the arrow. Are formed.

FIG. 14 shows a second modification of the third embodiment.
As shown in FIG. 14C, a thick ring-shaped outer fitting member 4 is formed.
2, the cup-shaped film portion 43 extending downward from the lower portion is cut into both sides to form a band-shaped film portion, and the opening formed by this cut is used as the liquid window portion 44. A pedestal portion 45 is provided on the upper portion of the bottom surface of the band-shaped film portion 43 so that the small-diameter tube portion 11 of the syringe body 10 is not closed.

FIG. 14A shows a closed state.
(B) pushes down the band-shaped membrane portion 43 through the pedestal portion 45 by inserting the small-diameter tube portion 11 of the syringe body 10, and the lateral groove portion 46 of the pedestal portion 45, the liquid passage window formed by cutting. This shows a state in which a liquid flow path indicated by an arrow that connects the small-diameter pipe section 11 and the opening 6 of the mixed injection pipe via the section 44 is formed.

FIG. 15 shows a third modification of the third embodiment of the plug with on-off valve 1 according to the present invention. The plug main body 2 has a cup-shaped lower part fitted to the opening 6 of the co-infusion tube. An outer fitting member 48 having a single membrane portion 47 and a cylindrical inner fitting member 49 fitted to the outer fitting member 48. The outer fitting member 48 is expandable and contractable, such as rubber. Mold with elastic material.

The outer fitting member 48 has an annular portion 5 at the upper edge.
0 is fitted into the step of the opening 6, the lower part from the annular part 50 is a cup-shaped film part 47, and the bottom part 5
A pedestal portion 53 that fits into the cylindrical portion 52 of the inner fitting member 49 is formed at a central portion of 1. Reference numeral 54 denotes a support portion provided on the upper surface of the pedestal portion 53 and having a lateral groove portion 55 with which the distal end surface of the small-diameter tube portion 11 of the syringe body 10 abuts.
56 is a bottom portion 51 of the cup-shaped film portion 47 of the external fitting member 48
And the inner wall surface of the cup-shaped film portion 47 and the pedestal portion 53
Annular portion 57 on the bottom surface of annular groove portion 57 between the outer peripheral surface of
a is a plurality of liquid passage holes drilled in a.

The inner fitting member 49 includes a cylindrical portion 52 fitted into the outer fitting member 48, an annular portion 50 above the outer fitting member, a cap portion 58 covering the upper portion of the opening 6, and an upper portion of the cylindrical portion 52. Fitting portion 59 of lid 4 provided in the opening of
Consists of

Reference numeral 60 denotes an inner lid fitted on the mounting portion of the lid 4 on the upper part of the inner fitting member 49, and an insertion hole 61 for the small-diameter tube portion 11 of the syringe body 10 is provided in the center part. The peripheral portion of the body 4 is clamped and fixed by the cap portion 58 and the inner lid body 60, so that the work of breaking the lid body 4 by the small-diameter tube portion 11 of the syringe body can be surely performed.

Numeral 62 denotes an outer lid for covering the mounting portion of the inner lid 60. One outer peripheral edge is attached to the cap 58 so as to be openable and closable by a hinge 63. Reference numeral 64 denotes a knob for opening and closing the outer cover.

FIG. 15A is a view showing a closed state of the on-off valve 3, wherein the cylindrical portion 52 of the inner fitting member 49 is attached to the outer fitting member 4.
8 is fitted into an annular groove portion 57 formed by the inner wall surface of the cup-shaped portion 47 and the outer peripheral surface of the pedestal portion 53,
An annular portion 57 a formed with a liquid passage hole 56 at the bottom of the cup-shaped membrane portion 47 is press-fitted to the annular distal end surface 52 a of the cylindrical portion 52 of the inner fitting member 49 with a predetermined tightening pressure. As a result, the liquid passage 56 of the cup-shaped membrane portion 47 is closed by the annular distal end surface 52a of the cylindrical portion 52, and the liquid passage is shut off.

When injecting a liquid, as shown in FIG. 15B, the outer lid 62 is opened, the small-diameter tube portion 11 of the syringe body is inserted through the hole of the inner lid 60, and the lid 4 is pierced. ,
The cup-shaped film portion 47 of the outer fitting member 48 is pushed downward through the support portion 54 on the upper surface of the pedestal portion 53 of the outer fitting member 48. That is, the cup-shaped film portion 47 is extended downward, and as shown in FIG. 15B, the lateral groove portion 55 of the support portion 54, the lower end portion of the cylindrical portion 52 of the inner fitting member 49, and the cup-shaped portion. The liquid passages indicated by arrows are formed between the pedestal portions 53 of the film portion 47 and the liquid passage holes 56 of the cup-shaped film portion 47.

The pedestal portion 40 provided on the bottom upper surface of the cup-shaped film portion 37 shown in FIG.
The pedestal portion 40 is formed of a plastic material to prevent deformation of the contact surface with the tip of the small-diameter tube portion 11 of the syringe main body 10 and to ensure a good liquid flow path. Note that the pedestal may be applied to the pedestal of the other embodiment.

FIG. 16 shows a modified example of the lid 4.
As shown in (A) and (B), a cross-shaped breaking groove 65 is cut in the lower surface 4a of the lid 4 in advance. The lid 4 is made of a brittle rubber elastic body or plastic elastic body. while using it,
As shown in FIG. 17, when the lid 4 is pierced by the small-diameter tube portion 11 of the syringe main body 10, the lid 4 moves in the direction shown by the arrow in FIG. Break.
In addition, when using the grooved lid for breaking in this cross shape,
As shown in FIG. 17, it is preferable that the peripheral edge of the lid 4 be sandwiched and fixed between the cap portion 58 and the middle lid 60. When the lid 4 provided with the cross-shaped breaking groove 65 is used, the lid 4 is clean, easy to determine whether it is unused or used, and is bitten by rubber-like elasticity to prevent it from falling off.

FIG. 18 shows that the retaining structure 68 is formed in the insertion hole 7 and the small-diameter tube 11 of the syringe body 10.
It is different from the plug with on-off valve 1 according to the third embodiment, and the same portions are denoted by the same reference numerals in other respects, and description thereof is omitted. Note that FIG. 18 shows a configuration based on the plug with on-off valve 1 of the first embodiment, and illustration of other embodiments is omitted.

The retaining structure 68 is provided with an engaging groove 69 formed spirally from the upper end of the insertion hole 7 of the plug with on-off valve 1.
And a locking projection 70 formed on the outer peripheral portion of the small-diameter tube portion 11 of the syringe main body 10 so as to correspond to the engaging groove 69 of the insertion hole 7. The locking projection 70 may be formed so that it can be screwed into the engagement groove 69.
In the figure, two locking projections 70 are formed. By providing the retaining structure 68 in this manner, it is possible to prevent the small-diameter tube portion 11 of the syringe main body 10 from dropping out of the insertion hole portion 7 naturally,
The injection and suction of the liquid by the syringe body 10 can be easily performed.

When the plug body with an on-off valve according to the present invention is mounted on a co-infusion tube incorporated in a blood circuit, it is necessary to set the tightening pressure of the on-off valve to a predetermined tightening pressure. is there. That is, a positive pressure side line and a negative pressure side line exist in the blood circuit. In particular, in the negative pressure side line, a negative pressure acts in a direction in which the membrane portion pressed against the lower end opening of the insertion hole is separated. The negative pressure generated in the blood circuit is usually 1 kg /
cm ² . Therefore, the on-off valve incorporated in the plug according to the present invention is 1 kg / c acting in the above-mentioned separating direction.
As it becomes sufficiently overcome the clamping pressure to negative pressure m ^2, first
In this embodiment, it is necessary to set the sticking force of the sheet-like film portion, the elastic force of the string-shaped hanging portion in the second embodiment, and the elastic force of the cup-like film portion in the third embodiment. .

[0075]

According to the present invention, when the liquid is sucked out from the opening and the liquid is injected into the opening using the syringe, it can be performed only by the syringe body without using the injection needle. Further, according to the present invention, liquid can be injected and sucked even when an injection needle is used, so that the use of the injection needle can be selected according to the use of the liquid.

[Brief description of the drawings]

FIG. 1A is a plan view of a plug with an on-off valve according to a first embodiment of the present invention, FIG. 1B is a cross-sectional view taken along line AA of FIG.
(C) is a bottom view.

FIG. 2 is an enlarged view of FIG.

FIG. 3A is a plan view of the on-off valve of the plug with the on-off valve according to the first embodiment, and FIG. 3B is a cross-sectional view taken along line AA of FIG.

FIG. 4 is an operation explanatory view of the plug with the on-off valve according to the first embodiment.

FIG. 5 is an explanatory diagram of a specific usage example of the plug with the on-off valve according to the first embodiment.

FIG. 6 is an axial center sectional view of a plug with an on-off valve according to a first modification of the first embodiment of the present invention.

FIG. 7 is an axial center sectional view of a plug with an on-off valve according to a second modification of the first embodiment of the present invention.

8A and 8B are sectional views of a plug with an on-off valve according to a second embodiment of the present invention, in which the on-off valve is in a closed state, and FIG. FIG.

FIG. 9A is a cross-sectional view of the on-off valve including the on-off valve of the plug with on-off valve according to the second embodiment, and FIG. 9B is a plan view of FIG.

FIGS. 10A and 10B are cross-sectional views including a shaft center showing a modification of the plug with an on-off valve according to the second embodiment, wherein FIG. 10A is a drawing of the on-off valve in a closed state, and FIG. It is.

FIGS. 11A and 11B are explanatory views of an on-off valve of a plug with an on-off valve according to a third embodiment of the present invention, wherein FIGS. 11A and 11B are perspective views of an on-off valve formed of a cup-shaped membrane.

12A and 12B are cross-sectional views of a plug with an on-off valve according to a third embodiment of the present invention, wherein FIG. 12A is a cross-sectional view illustrating a closed state, and FIG.

FIG. 13 is a first modified example of the third embodiment of the present invention, in which (A) is a sectional view showing a closed state of an on-off valve;
(B) is an explanatory diagram of the operation state.

FIG. 14 is a second modified example of the third embodiment of the present invention, in which (A) is a sectional view showing a closed state of an on-off valve;
(B) is an explanatory diagram of the operation state. (C) is a perspective view of the on-off valve which consists of a strip | belt-shaped film part.

FIG. 15 is a third modified example of the third embodiment according to the present invention, in which (A) is a sectional view showing a closed state of an on-off valve, and (B) is an explanatory view of an operation state thereof. is there.

FIG. 16 is an explanatory view of a lid of the plug with an on-off valve according to the present invention, wherein (A) is a sectional view and (B) is a bottom view.

FIG. 17 is a cross-sectional view showing an operation state of a lid of the plug with an on-off valve according to the present invention.

FIG. 18 is a drawing showing a retaining structure for a plug with an on-off valve according to the present invention.

[Explanation of symbols]

(1) Plug with on-off valve (2) Plug body (3) On-off valve (4) Lid (5) Covering member (6) Opening (7) Insertion hole (8) Large diameter hole (9) Flange (10) Syringe body (11) Small diameter tube (14) Sheet-like membrane (15), (29), (40), (45), (53) Pedestal (16), (32), (36), (41), (44),
(56) Liquid passage window (20), (38), (42), (48) Outer fitting member (21), (39), (49) Inner fitting member (22) Fitting hole (23) Annular Recess (24) Annular convex (65) Cross-shaped groove (68) Retaining structure

[Procedure amendment]

[Submission date] February 27, 2001 (2001.2.2)
7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Plug with check valve

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper which is hermetically attached to an opening of a vial or a co-infusion tube for injecting and sucking a liquid by using only a syringe body. The present invention relates to a plug with a check valve which can inject and suck liquid.

[0002]

2. Description of the Related Art Generally, medicine bottles and co-infusion tubes are used for injecting and sucking a liquid using a syringe. The medicine bottle hermetically seals the medicinal solution by fitting a rubber stopper into the opening, and means for taking out the medicinal solution from the medicine bottle pierces the rubber stopper with a syringe needle and sucks it. The co-infusion tube is a T-shaped tube in which a branch tube is extended from a side surface of a linearly formed tube main body, and is incorporated in a liquid circuit such as an infusion circuit or a blood circuit to inject a drug solution. That is, in the co-infusion tube, the rubber tube of the liquid circuit is connected to both ends of the tube main body, and a rubber stopper is fitted in the opening of the branch tube, and the injection needle of the syringe is pierced into the rubber stopper of the co-infusion tube. Then, the liquid medicine is injected into the liquid circuit. When a rubber stopper is fitted to the opening of a medicine bottle, co-infusion tube, etc.,
A needle must be used for blotting.

[0003]

However, there is a possibility that a patient's blood or drug may adhere to a needle used at a medical site, and there is a problem with its disposal and misuse of a used needle. Caused hospital-acquired infections. Regarding the disposal of the injection needle, manuals and the like are prepared and strictly managed, so that it is very troublesome. Furthermore, once used needles need to be disposed of, which has been a factor in increasing medical costs.

The inventor of the present invention has used an injection needle other than directly injecting a drug solution into a patient's body using a syringe, that is, taking out the drug solution from a drug bottle and injecting the drug solution into an infusion circuit or an infusion circuit. Attention is paid to the fact that an injection needle is used when performing the method, and the present invention is proposed from the viewpoint of reducing the use of the injection needle as much as possible.

Although the present invention will be described with reference to a case where only a syringe body is used without using a syringe needle, the present invention can also be applied to sucking and injecting a liquid by a connector in the same procedure, and a description thereof will be omitted.

[0006] That is, an object of the present invention is to provide a stopper with a check valve, which can suck up liquid from a vial and inject liquid into a co-infusion tube by using only a syringe body without using a syringe needle. That is.

[0007]

In order to achieve the above object, a plug with a check valve according to claim 1 of the present invention is fitted airtightly into an opening of a medicine bottle or an opening of a branch pipe of a co-infusion tube. A plug body, which is capable of sucking and injecting liquid by using only the syringe body, wherein an insertion hole for inserting a small-diameter tube portion of the syringe body in an airtight state is formed in a central portion; A check valve in the form of a film for opening and closing the lower end opening of the hole, and at the end of the operation of inserting the small-diameter tube of the syringe body into the insertion hole, a check valve at the tip of the small-diameter tube of the syringe body. To open and form a liquid flow path that communicates the inside of the opening with the small diameter tube of the syringe body.

In other words, the plug with a check valve according to the present invention is a plug that fits into an opening of a vial, a co-infusion tube or the like. In order to be able to suck and inject liquid into the stopper body, an insertion hole for inserting the small-diameter tube of the syringe body is formed in the center of the stopper body, and the lower end opening of the insertion hole is checked with a check valve. It can be opened and closed freely.

The plug with a check valve according to the second aspect is the first aspect.
In the plug with a check valve according to the above, the plug main body has an insertion hole for inserting the small diameter tube portion of the syringe main body at the center, and an enlarged diameter hole continuous with the insertion hole, By forming the lower end opening of the hole so as to protrude into the enlarged diameter hole, the check valve can be stretched in the enlarged diameter hole so as to close the lower end opening of the insertion hole with a predetermined tightening pressure. ing.

According to a third aspect of the present invention, there is provided a plug with a check valve.
Or in the plug with a check valve according to 2, wherein the plug body is
The outer fitting member fits into the opening and the inner fitting member fits into the outer fitting member, so that the outer fitting member and the inner fitting member can be made of different materials.

According to a fourth aspect of the present invention, there is provided a plug with a check valve.
In order to prevent the insertion hole portion from elastically contracting and hindering the insertion operation of the small-diameter tube portion of the syringe main body, the inner fitting member is made of a rigid material such as a synthetic resin. be able to.

According to a fifth aspect of the present invention, there is provided a plug with a check valve.
In the plug with a check valve according to any one of the above-mentioned items 4, the inner peripheral portion of the insertion hole portion is formed to be partially reduced in diameter so that the small-diameter tube portion of the syringe body is securely sealed. .

According to a sixth aspect of the present invention, there is provided a plug with a check valve.
In the plug with a non-return valve according to any one of claims 1 to 4, the inner peripheral portion of the insertion hole is formed so as to correspond to the outer shape of the small-diameter tube portion of the syringe body, whereby the small-diameter tube portion of the syringe body is securely formed. I tried to seal.

According to a seventh aspect of the present invention, there is provided a plug with a check valve.
The check valve-equipped plug according to any one of claims 1 to 3, wherein the check valve comprises a sheet-like film portion made of an elastic material and a pedestal portion formed on an upper surface portion of the sheet-like film portion. The sheet-like membrane portion is stretched so as to close the lower end opening of the insertion hole of the small diameter tube portion of the syringe body of the stopper body with a predetermined tightening pressure, and the lower end opening of the insertion hole is closed. A liquid-flow window is formed outside the region, and the pedestal is formed so that the small-diameter tube of the syringe body is not closed.

The check valve is made to be elastically pushed at the end of the operation of inserting the small-diameter tube portion of the syringe body into the insertion hole by making the sheet-like membrane portion made of an elastic material. Communicates with the small-diameter tube section of the syringe body,
When the small-diameter tube portion of the syringe body is pulled out from the insertion hole, the check valve is elastically restored so that the lower end opening of the insertion hole can be closed.

A liquid passage window serving as a liquid flow path is formed at or near the outer edge of the sheet-like membrane portion, that is, outside the closed portion of the lower end opening of the insertion hole.

The pedestal is formed at the center of the upper surface of the sheet-like membrane in order to prevent the tip of the small-diameter tube from closing when the check valve is pushed by the small-diameter tube of the syringe body. I have. For example, the shape of the pedestal portion is a disk body having a larger diameter than the small diameter tube portion of the syringe body, a concave groove formed over the entire width on the upper surface of the disk body, or the diameter of the small diameter tube portion of the syringe body. If the rectangular body is long and the width is smaller than the diameter of the small-diameter tube, the tip of the small-diameter tube of the syringe body contacts the upper surface of the pedestal portion. The tip is not occluded.

The plug with a check valve according to claim 8 is a plug which is fitted into an opening and is capable of sucking and injecting liquid using only the syringe body, wherein the stopper is a syringe body. A plug body having an insertion hole at the center for inserting the small-diameter tube portion in an airtight state, and a check valve that opens and closes a lower end opening of the insertion hole with a predetermined tightening pressure. The check valve comprises an outer fitting member fitted into the opening, and an inner fitting member fitted with the outer fitting member and having an insertion hole at the center for inserting the small-diameter tube portion of the syringe body. Are a plate-shaped membrane portion for opening and closing the lower end opening of the insertion hole of the small-diameter tube portion of the syringe body of the inner fitting member, and the plate-shaped membrane portion so that the small-diameter tube portion of the syringe body is not closed. A pedestal portion formed on the upper surface of the portion, and a plurality of string-shaped hanging portions made of an elastic material, the string-shaped hanging portion is Part is connected to the outer edge of the plate-shaped membrane part, and the upper end is connected to the upper end of the inner surface of the outer fitting member, and the lower end opening of the insertion hole of the small diameter pipe part of the syringe body is pressed with a predetermined tightening pressure. The plate-shaped membrane portion is suspended so as to be closed, and the plate-shaped membrane portion is pressed against the insertion hole by the elastic force of the string-shaped hanging portion.

The plug with a check valve according to the ninth aspect is the eighth aspect of the invention.
In the plug with a check valve according to the above, the check valve, the elastic force of at least one of the plurality of string-shaped suspensions of the string-shaped suspension is greater than the other string-shaped suspension, At the end of the insertion operation of the insertion hole of the small-diameter tube portion of the syringe main body, the insertion hole is opened by rotating the plate-shaped membrane around the lower part of the string-shaped hanging portion having a large elastic force as the center of rotation. It is characterized by.

According to a tenth aspect of the present invention, there is provided a plug with a check valve which is fitted into an opening and is capable of sucking and injecting liquid using only a syringe body. A plug body having an insertion hole at the center for inserting the small-diameter tube portion in an airtight state, and a check valve for opening and closing a lower end opening of the insertion hole, wherein the plug body fits into the opening. An outer fitting member, an inner fitting member fitted to the outer fitting member and having an insertion hole for inserting a small-diameter tube portion of the syringe main body at a central portion, wherein the check valve is made of an elastic material. A cup-shaped film portion, and a pedestal portion formed on the upper surface of the bottom of the cup-shaped film portion. The cup-shaped film portion is fitted on the inner fitting member, and the entire upper peripheral edge is an outer fitting member. Is connected to the entire inner peripheral edge of the upper portion of the inner wall of the cup-shaped membrane portion, and is inserted into the small-diameter tube portion of the syringe main body of the inner fitting member. The lower end opening of the portion is closed with a predetermined tightening pressure, and a pedestal portion is formed so as not to block the small diameter tube portion of the syringe body, and a plurality of cup-shaped membrane portions are provided on the entire peripheral surface. A liquid passage window is formed.

In the plug with a check valve according to an eleventh aspect, in the plug with the check valve according to the tenth aspect, the width between the liquid passage windows of the cup-shaped membrane portion is reduced to be adjacent to the non-return valve. And a string-like portion between the liquid passage windows.

According to a twelfth aspect of the present invention, there is provided the plug with a check valve according to the tenth aspect, wherein a thick ring-shaped outer fitting member in which the plug body fits into the opening is provided. An inner fitting member having a lower portion protruding from the outer fitting member in a state of being fitted to the fitting member, and a cup-shaped film portion made of an elastic material that is fitted over the projecting portion of the inner fitting member projecting from the outer fitting member. The thick ring-shaped outer fitting member and the cup-shaped membrane are integrally formed, and the lower end opening of the insertion hole of the small-diameter tube portion of the syringe body of the inner fitting member is formed on the bottom inner surface of the cup-shaped membrane. The syringe is closed with a predetermined tightening pressure so that the small-diameter tube portion of the syringe body is not closed with the pedestal portion formed on the bottom upper surface, and a plurality of liquid passage windows are formed on the peripheral surface of the cup-shaped membrane portion. Is formed.

According to a thirteenth aspect of the present invention, there is provided the plug with a check valve according to the tenth aspect, wherein the plug body has a thick ring-shaped outer fitting member fitted into the opening. An inner fitting member having a lower portion protruding downward from the outer fitting member in a state of being fitted to the outer fitting member, and a band-shaped elastic material partially covering the projecting portion of the inner fitting member projecting from the outer fitting member. The thick ring-shaped outer fitting member and the band-shaped film portion are integrally formed, and the tip of the insertion hole of the small-diameter tube portion of the syringe body of the inner fitting member is formed on the bottom inner surface of the band-shaped film portion. The opening is closed with a predetermined tightening pressure, so that the pedestal formed on the bottom upper surface does not close the small-diameter tube portion of the syringe body, and both side surfaces of the band-shaped membrane are passed through the liquid window. It is characterized by having.

According to a fourteenth aspect of the present invention, there is provided the plug with a check valve according to the tenth aspect, wherein the plug body includes a thick ring-shaped outer fitting member fitted into the opening. An inner fitting member having a lower portion protruding downward from the outer fitting member in a state fitted to the outer fitting member, and a cup-shaped film portion made of an elastic material covering a protruding portion of the inner fitting member from the outer fitting member. The thick ring-shaped outer fitting member and the cup-shaped film are integrally formed, and a plurality of the ring-shaped outer fitting members are formed at the bottom of the cup-shaped film and at the annular portion abutting on the annular distal end surface of the inner fitting member. And the annular portion of the cup-shaped membrane portion having the through hole is pressed against the annular distal end surface of the inner fitting member with a predetermined tightening pressure, and the annular distal end surface of the inner fitting member is pressed against the annular distal end surface of the inner fitting member. A plurality of liquid holes provided in the cup-shaped membrane portion are closed, and a syringe body is provided by a pedestal portion provided on the bottom surface of the cup-shaped membrane portion. It characterized in that as not to occlude the small diameter tube portion.

According to a fifteenth aspect of the present invention, there is provided a plug with a check valve according to any one of the tenth, twelfth and thirteenth aspects, wherein the pedestal is formed on an upper surface of a bottom of the cup-shaped membrane. It is characterized by comprising a disc body formed of a plastic material and a pedestal integrally formed on the disc body.

According to a sixteenth aspect of the present invention, there is provided a plug with a check valve according to any one of the first, third, eighth, tenth, and twelfth aspects. A lid is fitted into the upper end opening of the insertion hole of the small-diameter tube portion of the syringe body, the lid is formed of an elastic material, and a cross breaking groove is provided on one surface. I do.

According to a seventeenth aspect of the present invention, there is provided a stopper body with a check valve, wherein the stopper body with the check valve according to any one of the third and twelfth aspects and the syringe body are prevented from falling off. An engagement groove is formed in the insertion hole of the body, and a locking projection corresponding to the engagement groove is formed in the small-diameter tube of the syringe body.

[0028]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a plug with a check valve according to the present invention.

FIG. 1 shows a plug 1 with a check valve according to a first embodiment of the present invention, wherein FIG. 1A is a plan view, and FIG. 1B is a plan view of FIGS. C) is a cross-sectional view taken along line AA, FIG. 2 (C) is a bottom view, FIG. 2 is an enlarged view of FIG. 1 (B), and FIG. FIG. 4B is a plan view and FIG. 4B is a sectional view taken along line AA of FIG. 4A, and FIG. 4 is an operation explanatory view of the plug 1 with a check valve.

The plug 1 with a check valve, as shown in FIGS. 1B and 2, comprises a plug body 2, a check valve 3, a lid 4 and a cover member 5, and includes a medicine bottle, It is airtightly mounted on the opening 6 of the co-infusion tube to allow the inside and the outside of the medicine bottle or co-infusion tube to communicate with and shut off.

The stopper body 2 is made of an elastic material such as rubber, and is fitted into the opening 6 of a medicine bottle or a co-infusion tube as shown in FIGS. The insertion hole 7 and the enlarged diameter hole 8 of the small-diameter tube portion 11 (FIG. 4) of the main body 10 are formed, and a flange portion 9 is formed on the outer peripheral portion of the upper end toward the outside.

The insertion hole 7 is a portion into which the small-diameter tube portion 11 (FIG. 4) of the syringe body 10 is inserted, and a fitting portion 12 into which the lid 4 is fitted is formed at the upper inner edge. The peripheral portion is partially reduced in diameter to seal the outer peripheral surface of the small-diameter pipe portion 11, and the lower end opening 7 a is closed by the check valve 3.

The lower end opening 7a of the insertion hole 7 protrudes into the enlarged diameter hole 8, and the check valve 3 is stretched to close the lower end opening 7a of the insertion hole 7. In the state shown in FIGS. 1 and 2, the lower end opening 7a of the insertion hole 7 is closed by the check valve 3 with a predetermined tightening pressure, and the check valve 3 connects the insertion hole 7 to the medicine bottle or the co-infusion tube. The continuous enlarged hole 8 is closed.

The flange portion 9 is provided at the upper end surface of the opening 6 to prevent the plug body 2 from entering the inside of the opening 6 when the stopper main body 2 is fitted into the opening 6 such as a medicine bottle. The plug body 2 extends outward from the upper end of the outer periphery of the plug body 2 so that the stopper body 2 can be locked. An annular rib 13 for sealing the upper end surface of the opening 6 is formed on the lower surface side of the flange portion 9 so that the liquid in the vial can pass through the outer peripheral portion of the stopper body 2 and the opening 6.
To prevent leakage from between the inner peripheral portion and the inner peripheral portion. still,
The annular rib 13 may be formed separately from a material different from that of the plug body 2. In this case, it is preferable to form a groove on the lower surface side of the flange portion 9 in which the annular rib 13 can be fitted.

In the present embodiment, an example in which there is a small gap between the outer peripheral portion of the plug body 2 and the inner peripheral portion of the opening 6 has been described. The outer diameter of the plug body 2 is made of an elastic material such as rubber so that the outer diameter of the plug body 2 is slightly larger than the inner diameter of the opening 6 to such an extent that the plug body 2 is elastically deformable and can be screwed into the opening 6. You may.

As shown in FIG. 3, the check valve 3 includes a sheet-like film portion 14 made of an elastic material such as rubber and a pedestal portion 15 formed at the center of the upper surface of the sheet-like film portion 14. It is composed of The sheet-like membrane portion 14 is stretched inside the enlarged diameter hole 8 so as to close the lower end opening 7 a of the insertion hole 7 of the plug body 2, and from the closed portion of the lower end opening 7 a of the insertion hole 7. A liquid passage window 16 is formed on the outside. The pedestal portion 15 is formed with a concave groove portion 17 over the entire width from the upper surface portion to the bottom portion of the disk body, and is accommodated in the lower end opening 7a of the insertion hole portion 7 and is inserted into the insertion hole portion 7. The diameter is larger than the distal end opening 11a (FIG. 4) of the small diameter tube portion 11 of the main body 10. That is, the pedestal portion 15 may be other than the illustrated one as long as the small-diameter tube portion 11 of the syringe body 10 inserted into the insertion hole portion 7 is formed so as not to be closed. May be replaced by a rectangular base (not shown). The rectangular base portion has a length longer than the diameter of the small-diameter tube portion 11 of the syringe main body 10 and shorter than the diameter of the lower end opening 7a of the insertion hole 7.
If the width is smaller than the diameter of the small diameter tube portion 11 of the syringe body 10, the small diameter tube portion 11 of the syringe body 10 can be prevented from being closed.

In the check valve 3, the sheet-shaped membrane portion 14 and the pedestal portion 15 may be integrally formed of an elastic material such as rubber, or a pedestal formed separately from the sheet-shaped membrane portion 14. Part 15
May be integrated by means such as bonding or welding. In the latter case, the material of the pedestal portion 15 does not need to be limited to an elastic material such as rubber, and may be an inelastic synthetic resin or the like as long as it is hard enough to easily pierce the injection needle 18 (FIG. 5). .

As shown in FIGS. 1B and 2, the lid 4 has a fitting portion 1 formed at an upper end opening of the insertion hole 7.
2 to prevent dust from entering the insertion hole 7. As a matter of course, when inserting the small-diameter tube portion 11 of the syringe main body into the insertion hole 7, the lid 4 is removed from the fitting portion 12 of the plug main body 2. Further, the lid 4 may be pivotally attached to the plug body 2 or the covering member 5, or the lid body 2
Or a member manufactured separately from the covering member 5.
It is desirable that it is the same size as the shape of No. 2. If an appropriate handle (not shown) is formed on the upper surface of the lid 4,
The lid 4 can be easily removed from the fitting portion 12.

As shown in FIGS. 1 and 2, the covering member 5 is made of a metal such as aluminum which is a plastic material or a synthetic resin which is a thermoplastic material. Is what you do. When the flange 9 is pressed against the upper end surface of the opening 6 to such an extent that the annular rib 13 is elastically deformed, the annular rib 13 comes into airtight contact with the upper end surface of the opening 6 and the plug body 2 Liquid can be reliably prevented from leaking from between the outer peripheral portion of the first opening and the inner peripheral portion of the opening 6.

Next, the operation of the plug with check valve 1 according to the first embodiment will be described with reference to FIG. First, the plug with check valve 1
After the lid 4 is removed from the syringe body 1, the syringe body 1 is inserted into the insertion hole 7.
0 small-diameter tube part 11 is inserted. At the end of the insertion operation of the small-diameter tube portion 11, the pedestal portion 15 of the check valve 3 is pushed by the tip portion 11a of the small-diameter tube portion 11 so that the sheet-like membrane portion 14 of the check valve 3 and the insertion hole portion are inserted. 7 can be elastically separated from the lower end opening 7a. As a result, a liquid flow path (dashed line in FIG. 4) that connects the small-diameter tube portion 11 of the syringe body 10 and the inside of the opening 6 is formed.

For example, the liquid flow path for injecting a liquid from the opening 6 is as shown by a chain line in FIG.
0, the small-diameter tube portion 11, the concave groove portion 1 of the pedestal portion 15 of the check valve 3.
7, a gap between the sheet-like membrane portion 14 of the check valve 3 and the lower end opening 7a of the insertion hole 7, the liquid passage window 16 of the check valve 3, and the inside of the opening 6 are formed in this order. Further, the liquid flow path when sucking the liquid from the opening 6 is only in the reverse order of the liquid flow path when injecting the liquid, and thus the description is omitted. In addition, the opening 6 of the medicine bottle
When the liquid is sucked from the opening 6, the opening 6 may be directed downward so that the liquid is filled in the enlarged diameter hole 8.

Further, since the inner peripheral surface of the insertion hole 7 is formed to have a partially reduced diameter, when the small diameter tube of the syringe body is inserted into the insertion hole 7, the outer diameter of the small diameter tube 11 is reduced. Surface can be sealed. Therefore, when injecting and sucking the liquid, it is possible to prevent liquid leakage from between the small-diameter tube portion 11 of the syringe body 10 and the insertion hole 7.

As described above, the plug with check valve 1 according to the first embodiment sucks the liquid from the opening 6 such as a medicine bottle by using only the syringe body 10 without using the injection needle, or The liquid can be injected from the opening 6 of the co-infusion tube.

Further, the plug with check valve 1 according to the first embodiment.
As shown in FIG. 5, the check valve 3 is made of a material that can pierce the injection needle 18 in the same manner as a conventional rubber stopper or the like. Can be done. In FIG. 5, the lid 4 is also made of a material that can be pierced by the injection needle 18.

FIG. 6 shows a plug 1 with a check valve according to a first modification of the first embodiment. In the plug with check valve 1 according to this modified example, as shown in FIG. 6, the inner peripheral surface shape of the insertion hole 7 is formed corresponding to the shape (tapered shape) of the small diameter tube portion 11 of the syringe body 10. The first embodiment is different from the first embodiment in that the plug body 2 is made up of an outer fitting member 20 and an inner fitting member 21. In other respects, the check valve according to the first embodiment is different. Since it is the same as the stopper 1, the same parts are denoted by the same reference numerals and description thereof will be omitted.

That is, in the plug 1 with a check valve according to the modification shown in FIG. 6, the insertion hole 7 is inserted into the small-diameter tube 1 of the syringe body 10.
1 (tapered shape), the small diameter tube portion 11 of the syringe body 10 can be reliably sealed,
Further, it is possible to prevent the check valve 3 from being damaged by excessively inserting the small-diameter tube portion 11 into the insertion hole portion 7.

The plug body 2 includes an outer fitting member 20 fitted into the opening 6 and an inner fitting member 21 fitted into the outer fitting member 20. The outer fitting member 20 has a fitting hole 22 into which the inner fitting member 21 is fitted, and a diameter-enlarging hole 8 continuous with the fitting hole 22, and the inner fitting member 21 is located at the center thereof.
0 having a small-diameter tube portion 11 for insertion.
With the inner fitting member 21 inserted into the outer fitting member 20, the distal end of the inner fitting member 21 projects into the enlarged diameter hole 8 of the outer fitting member 20.

That is, in the plug 1 with a check valve, the plug body 2 is divided into an outer fitting member 20 and an inner fitting member 21 so that the outer fitting member 20 and the inner fitting member 21 are made of different materials. Can be. For example, the outer fitting member 20 can be made of an elastic material such as rubber, and the inner fitting member 21 can be made of a rigid material such as a synthetic resin. In this case, it is possible to prevent the outer fitting member 20 from being elastically contracted, and following this, the insertion hole portion 7 of the inner fitting member 21 from being elastically contracted. That is, if the diameter of the insertion hole 7 shrinks, the operation of inserting the small-diameter tube 11 of the syringe body 10 into the insertion hole 7 is hindered. Therefore, it is desirable that the inner fitting member 21 be made of a rigid material such as a synthetic resin. . In addition, synthetic resin has lower reactivity to chemicals than rigid materials such as metal, and is lightweight and inexpensive.
Is suitable as a material for the above.

An annular concave portion 23 and an annular convex portion 24 are formed in the fitting hole 22 of the outer fitting member 20 and the outer surface of the inner fitting member 21 so as to be engaged with each other. The combined inner fitting member 21 has the function of preventing the inner fitting member 21 from coming off.

FIG. 7 shows a plug with check valve 1 according to a second modification of the first embodiment, which is substantially the same as the plug with check valve according to the second modification. The same parts are denoted by the same reference numerals, and description thereof is omitted. In FIG.
Is composed of a cylindrical outer fitting member 20 fitted to the opening 6 and an inner fitting member 21 fitted to the outer fitting member 20. The inner fitting member 21 has an insertion hole 7 at the center thereof for inserting the small diameter tube portion 11 of the syringe body 10, and the inner fitting member 21 and the outer fitting member 20 An enlarged diameter hole 8 is formed between them.

The check valve 3 has a pedestal portion 15 which fits into the insertion hole 7 at a central portion, and a liquid passage window portion 1 at an outer peripheral edge.
The entire periphery of the sheet-like film portion 14 having the
No. 0 is welded or bonded to the upper part of the inner peripheral surface. That is, the pedestal 15 at the center is stretched into the insertion hole 7 so as to be fitted with a predetermined tightening pressure. When the small-diameter tube 11 of the syringe main body 10 is inserted into the insertion hole 7 on the upper surface of the pedestal 15,
The groove 17 is formed so that the small-diameter tube 11 is not closed. The state of the chain edge shows a state in which the sheet-like membrane portion 14 is opened by the small-diameter tube portion 11 of the syringe main body 10.

FIGS. 8 and 9 show a plug with check valve 1 according to a second embodiment of the present invention. This check valve-equipped plug 1 is different from the first embodiment in the structure of the check valve 3 and is otherwise the same as the check valve-equipped plug 1 according to the embodiment. The same parts are denoted by the same reference numerals, and description thereof is omitted. FIG. 8 shows a case where the plug with check valve 1 is attached to the opening 6 of the co-infusion tube.

The inner fitting member 21 constituting the plug body 2 of the plug with check valve 1 according to the second embodiment has a flange portion 25 which is engaged with the upper end surface of the outer fitting member 20. The protrusion 25 formed on the upper end surface of the outer fitting member 20
Is formed. The outer shape of the outer fitting member 20 is formed in a shape corresponding to the inner shape of the opening 6.

The check valve 3 of the plug 1 with a check valve includes:
As shown in FIG. 9, the inner fitting member 21 includes a plate-shaped film portion 28 for closing the lower end opening 7 a of the insertion hole 7, a pedestal portion 29, and a string-shaped hanging portion 30. The plate-like film portion 28 may be made of a rigid material such as a synthetic resin, unlike the other embodiments described above, and a pedestal portion 29 is formed at the center of the upper surface. However, in the case where the plate-like film portion 28 is made of a rigid material, a sheet made of an elastic material is stretched in a portion that comes into contact with the lower end opening 7a of the inner fitting member 21 so that the lower end opening 7a in the closed state and the plate It is necessary to ensure confidentiality with the film-like portion 28. The pedestal part 29 has a cross-shaped groove 3 in a truncated conical body.
1 and is formed so as not to close the small-diameter tube portion 11 of the syringe body 10 as in the other embodiments described above. Four string-shaped hanging portions 30 made of an elastic material such as rubber are connected to the outer edge of the plate-shaped film portion 28 at equal intervals.

As shown in FIGS. 8A and 8B, one end of the string-shaped hanging portion 30 is connected to the outer edge of the plate-like film portion 28, and the other end is connected to the outer fitting member 20. By connecting to the upper end of the inner peripheral surface, the elastic force of the inner peripheral surface allows the plate-shaped film portion 28 to be inserted into the lower end opening 7a of the insertion hole 7 of the inner fitting member 21 as shown in FIG. Airtight contact is made with the tightening pressure.

As shown in FIG. 8 (B), the small-diameter tube portion 11 of the syringe body 10 is inserted into the insertion hole 7 and the check valve 3 is terminated at the end of the insertion operation. The plate-shaped film portion 28 is pushed in through the pedestal portion 29, and the lower end opening 7a of the insertion hole 7 and the opening 6 communicate with each other through the gap 32 between the cord-shaped hanging portions 30. That is, the liquid passage window of the check valve 3 in the second embodiment is formed by the gaps 32 between the cord-shaped hanging portions 30.

The plug 1 with check valve shown in FIG.
Is a modification of the second embodiment shown in FIG. 1, in which one of the four string-shaped suspension parts 30 of the check valve 3 has a larger elastic force than the other string-shaped suspension parts 30. The difference is that a pedestal portion is not formed on the plate-like film portion 28. This check valve 3 is shown in FIGS.
As shown in FIG. 5, a plate-shaped film portion 28 made of a rigid material such as a synthetic resin, three string-shaped hanging portions 30,
And a string-shaped hanging portion 30a. That is, when the small-diameter tube portion 11 of the syringe body 10 is inserted into the insertion hole 7 and the check valve 3 is pushed in, the plug 1 with a check valve is
As shown in (B), since the elastic force of the string-shaped hanging portion 30a is large, it is hard to expand as compared with the other string-shaped hanging portions 30, and the lower end portion 30a 'of the string-shaped hanging portion 30a becomes the center of rotation and becomes plate-shaped. Is rotated to form a liquid flow path indicated by an arrow.

FIGS. 11 and 12 show a third embodiment.
The second embodiment differs from the second embodiment in that the check valve 3 is constituted by the cup-shaped film portion 33 shown in FIGS. As shown in FIG. 11A, the cup-shaped film portion 33 has a shape covering the outer peripheral surface portion 21a and the lower end opening portion 7a of the inner fitting member 21 of the plug body 2, and is formed of an elastic body. A pedestal portion 29 similar to the check valve 3 of the other embodiment is provided on the upper surface of the bottom portion 34 of the cup-shaped film portion 33, and the bottom portion 34 of the peripheral wall portion 35 of the cup-shaped film portion 33 is provided. A plurality of liquid passage windows 36 are formed at a position above the liquid crystal display. As shown in FIG. 12A, the cup-shaped film portion 33 is
The entire periphery of the upper part is bonded or welded to the inner periphery of the upper part of the outer fitting member 20 in a state of being fitted to the outer member 20. FIG. 12B shows that the small-diameter tube portion 11 of the syringe body 10 is
In the drawing, the cup-shaped membrane portion 33 is extended downward through the pedestal portion 29 in association with the insertion operation of the small-diameter tube portion 11, and the liquid passage window portion 36 is shown. Is extended to a position below the lower end opening 7a of the insertion hole 7 of the inner fitting member 21. As a result, the small-diameter tube portion 11 of the syringe body 10 is
A liquid flow path indicated by an arrow connecting the opening and the opening 6 is formed, and the liquid can be injected. As shown in FIG. 11B, when the interval between the liquid passage windows 36 of the cup-shaped thin film portion 33 is reduced, the portion between the adjacent liquid passage windows 36 becomes a string-shaped hanging portion, The same effect as the check valve 3 of the second embodiment is exerted.

FIG. 13 shows a first modification of the third embodiment, in which the stopper body 2 is fitted into the opening 6 of the co-infusion tube, and a cup-shaped membrane portion 37 extending downward from the inner peripheral edge is integrated. And the thick ring-shaped outer fitting member 38 and the thick ring-shaped outer fitting member 38, the lower half of which protrudes downward from the outer fitting member 38. The inner fitting member 39 is covered. The thick ring-shaped outer fitting member 38 and the cup-shaped film portion 37 are integrally formed of an elastic material. A pedestal portion 40 is provided on the inner surface of the bottom of the cup-shaped membrane portion 37 so as not to close the small-diameter tube portion 11 of the syringe body 10, and a plurality of liquids are passed through the peripheral side surface of the cup-shaped membrane portion 37. The window 41 is formed.

FIG. 13A shows a state in which the check valve 3 closes the lower end opening 7a of the insertion hole 7, and FIG.
Inserts the small-diameter tube portion 11 of the syringe main body 10 into the insertion hole portion 7 and extends the cup-shaped membrane portion 37 downward through the pedestal portion 40, and the liquid passage window portion 41 is opened to open the fluid path as indicated by the arrow. Are formed.

FIG. 14 shows a second modification of the third embodiment.
As shown in FIG. 14C, a thick ring-shaped outer fitting member 4 is formed.
2, the cup-shaped film portion 43 extending downward from the lower portion is cut into both sides to form a band-shaped film portion, and the opening formed by this cut is used as the liquid window portion 44. A pedestal portion 45 is provided on the upper portion of the bottom surface of the band-shaped film portion 43 so that the small-diameter tube portion 11 of the syringe body 10 is not closed.

FIG. 14A shows a closed state.
(B) pushes down the band-shaped membrane portion 43 through the pedestal portion 45 by inserting the small-diameter tube portion 11 of the syringe body 10, and the lateral groove portion 46 of the pedestal portion 45, the liquid passage window formed by cutting. This shows a state in which a liquid flow path indicated by an arrow that connects the small-diameter pipe section 11 and the opening 6 of the mixed injection pipe via the section 44 is formed.

FIG. 15 shows a third modification of the third embodiment of the plug with check valve 1 according to the present invention, in which the plug main body 2 is provided with a cup at the lower part fitted into the opening 6 of the co-infusion tube. An outer fitting member 48 having a single membrane portion 47 in one body, and a cylindrical inner fitting member 49 fitted to the outer fitting member 48. The outer fitting member 48 is expandable and contractable, for example, rubber. It is molded with an elastic material such as

The outer fitting member 48 has an annular portion 5 at the upper edge.
0 is fitted into the step of the opening 6, the lower part from the annular part 50 is a cup-shaped film part 47, and the bottom part 5
A pedestal portion 53 that fits into the cylindrical portion 52 of the inner fitting member 49 is formed at a central portion of 1. Reference numeral 54 denotes a support portion provided on the upper surface of the pedestal portion 53 and having a lateral groove portion 55 with which the distal end surface of the small-diameter tube portion 11 of the syringe body 10 abuts.
56 is a bottom portion 51 of the cup-shaped film portion 47 of the external fitting member 48
And the inner wall surface of the cup-shaped film portion 47 and the pedestal portion 53
Annular portion 57 on the bottom surface of annular groove portion 57 between the outer peripheral surface of
a is a plurality of liquid passage holes drilled in a.

The inner fitting member 49 includes a cylindrical portion 52 fitted into the outer fitting member 48, an annular portion 50 above the outer fitting member, a cap portion 58 covering the upper portion of the opening 6, and an upper portion of the cylindrical portion 52. Fitting portion 59 of lid 4 provided in the opening of
Consists of

Reference numeral 60 denotes an inner lid fitted on the mounting portion of the lid 4 on the upper part of the inner fitting member 49, and an insertion hole 61 for the small-diameter tube portion 11 of the syringe body 10 is provided in the center part. The peripheral portion of the body 4 is clamped and fixed by the cap portion 58 and the inner lid body 60, so that the work of breaking the lid body 4 by the small-diameter tube portion 11 of the syringe body can be surely performed.

Numeral 62 denotes an outer lid for covering the mounting portion of the inner lid 60. One outer peripheral edge is attached to the cap 58 so as to be openable and closable by a hinge 63. Reference numeral 64 denotes a knob for opening and closing the outer cover.

FIG. 15A is a view showing a closed state of the check valve 3, in which the cylindrical portion 52 of the inner fitting member 49 is attached to the outer fitting member 4.
8 is fitted into an annular groove portion 57 formed by the inner wall surface of the cup-shaped portion 47 and the outer peripheral surface of the pedestal portion 53,
An annular portion 57 a formed with a liquid passage hole 56 at the bottom of the cup-shaped membrane portion 47 is press-fitted to the annular distal end surface 52 a of the cylindrical portion 52 of the inner fitting member 49 with a predetermined tightening pressure. As a result, the liquid passage 56 of the cup-shaped membrane portion 47 is closed by the annular distal end surface 52a of the cylindrical portion 52, and the liquid passage is shut off.

When injecting a liquid, as shown in FIG. 15B, the outer lid 62 is opened, the small-diameter tube portion 11 of the syringe body is inserted through the hole of the inner lid 60, and the lid 4 is pierced. ,
The cup-shaped film portion 47 of the outer fitting member 48 is pushed downward through the support portion 54 on the upper surface of the pedestal portion 53 of the outer fitting member 48. That is, the cup-shaped film portion 47 is extended downward, and as shown in FIG. 15B, the lateral groove portion 55 of the support portion 54, the lower end portion of the cylindrical portion 52 of the inner fitting member 49, and the cup-shaped portion. The liquid passages indicated by arrows are formed between the pedestal portions 53 of the film portion 47 and the liquid passage holes 56 of the cup-shaped film portion 47.

The pedestal portion 40 provided on the bottom upper surface of the cup-shaped film portion 37 shown in FIG.
The pedestal portion 40 is formed of a plastic material to prevent deformation of the contact surface with the tip of the small-diameter tube portion 11 of the syringe main body 10 and to ensure a good liquid flow path. Note that the pedestal may be applied to the pedestal of the other embodiment.

FIG. 16 shows a modified example of the lid 4.
As shown in (A) and (B), a cross-shaped breaking groove 65 is cut in the lower surface 4a of the lid 4 in advance. The lid 4 is made of a brittle rubber elastic body or plastic elastic body. while using it,
As shown in FIG. 17, when the lid 4 is pierced by the small-diameter tube portion 11 of the syringe main body 10, the lid 4 moves in the direction shown by the arrow in FIG. Break.
In addition, when using the grooved lid for breaking in this cross shape,
As shown in FIG. 17, it is preferable that the peripheral edge of the lid 4 be sandwiched and fixed between the cap portion 58 and the middle lid 60. When the lid 4 provided with the cross-shaped breaking groove 65 is used, the lid 4 is clean, easy to determine whether it is unused or used, and is bitten by rubber-like elasticity to prevent it from falling off.

FIG. 18 shows that the retaining structure 68 is formed in the insertion hole 7 and the small-diameter tube 11 of the syringe body 10.
The third embodiment is different from the plug with check valve 1 according to the third embodiment. In other respects, the same portions are denoted by the same reference numerals and description thereof is omitted. Note that FIG. 18 illustrates a structure based on the plug 1 with a check valve of the first embodiment, and illustration of other embodiments is omitted.

The retaining structure 68 is provided with an engaging groove 69 spirally formed from the upper end of the insertion hole 7 of the plug 1 with a check valve.
And a locking projection 70 formed on the outer peripheral portion of the small-diameter tube portion 11 of the syringe main body 10 so as to correspond to the engaging groove 69 of the insertion hole 7. The locking projection 70 may be formed so that it can be screwed into the engagement groove 69.
In the figure, two locking projections 70 are formed. By providing the retaining structure 68 in this manner, it is possible to prevent the small-diameter tube portion 11 of the syringe main body 10 from dropping out of the insertion hole portion 7 naturally,
The injection and suction of the liquid by the syringe body 10 can be easily performed.

When the plug body with a check valve according to the present invention is mounted on a co-infusion tube incorporated in the blood circuit, the tightening pressure of the check valve is set to a predetermined tightening pressure. There is a need. That is, a positive pressure side line and a negative pressure side line exist in the blood circuit. In particular, in the negative pressure side line, a negative pressure acts in a direction in which the membrane portion pressed against the lower end opening of the insertion hole is separated. The negative pressure generated in the blood circuit is usually 1 kg /
cm ² . Therefore, the check valve incorporated in the plug according to the present invention has a 1 kg / c acting in the separating direction.
As it becomes sufficiently overcome the clamping pressure to negative pressure m ^2, first
In this embodiment, it is necessary to set the sticking force of the sheet-like film portion, the elastic force of the string-shaped hanging portion in the second embodiment, and the elastic force of the cup-like film portion in the third embodiment. .

[0075]

According to the present invention, when the liquid is sucked out from the opening and the liquid is injected into the opening using the syringe, it can be performed only by the syringe body without using the injection needle. Further, according to the present invention, liquid can be injected and sucked even when an injection needle is used, so that the use of the injection needle can be selected according to the use of the liquid.

[Brief description of the drawings]

FIG. 1A is a plan view of a plug with a check valve according to a first embodiment of the present invention, FIG. 1B is a cross-sectional view taken along line AA of FIG.
(C) is a bottom view.

FIG. 2 is an enlarged view of FIG.

FIG. 3A is a plan view of a check valve of the plug with a check valve according to the first embodiment, and FIG. 3B is a cross-sectional view taken along line AA of FIG.

FIG. 4 is an operation explanatory view of the plug with a check valve according to the first embodiment.

FIG. 5 is an explanatory diagram of a specific usage example of the plug with a check valve according to the first embodiment.

FIG. 6 is a sectional view of a plug with a check valve according to a first modification of the first embodiment of the present invention, which includes an axial center.

FIG. 7 is a sectional view including a shaft center of a plug with a check valve according to a second modification of the first embodiment of the present invention.

FIGS. 8A and 8B are sectional views of a plug with a check valve according to a second embodiment of the present invention, in which the check valve is in a closed state, and FIG. It is operation | movement explanatory drawing.

FIG. 9A is a sectional view of a check valve with a check valve-equipped plug according to a second embodiment, including an axial center of a check valve, and FIG. 9B is a plan view of FIG.

FIG. 10 is a sectional view including a shaft center showing a modification of the plug with a check valve according to the second embodiment, in which (A) is a drawing in which the check valve is closed, and (B) is an operation thereof. FIG.

FIGS. 11A and 11B are explanatory views of a check valve of a plug with a check valve according to a third embodiment of the present invention, and FIGS. 11A and 11B are perspective views of a check valve formed of a cup-shaped membrane; is there.

12A and 12B are cross-sectional views of a plug with a check valve according to a third embodiment of the present invention, in which FIG. 12A is a cross-sectional view showing a closed state, and FIG.

FIG. 13 is a first modification of the third embodiment of the present invention, in which (A) is a cross-sectional view showing a check valve closed state;
(B) is an explanatory diagram of the operation state.

FIG. 14 is a second modified example of the third embodiment of the present invention, in which (A) is a sectional view showing a closed state of a check valve;
(B) is an explanatory diagram of the operation state. (C) is a perspective view of the check valve which consists of a strip | belt-shaped film part.

FIG. 15 is a third modified example of the third embodiment according to the present invention, in which (A) is a sectional view showing a closed state of a check valve, and (B) is an explanatory view of an operation state thereof. It is.

FIG. 16 is an explanatory view of a lid of the plug with a check valve according to the present invention, wherein (A) is a cross-sectional view and (B) is a bottom view.

FIG. 17 is a sectional view showing an operation state of a lid of the plug with a check valve according to the present invention.

FIG. 18 is a drawing showing a retaining structure for a plug with a check valve according to the present invention.

[Description of Signs] (1) Plug with check valve (2) Plug body (3) Check valve (4) Lid (5) Covering member (6) Opening (7) Insertion hole (8) (9) Flange (10) Syringe body (11) Small diameter tube (14) Sheet-like membrane (15), (29), (40), (45), (53) Pedestal ( 16), (32), (36), (41), (44),
(56) Liquid passage window (20), (38), (42), (48) Outer fitting member (21), (39), (49) Inner fitting member (22) Fitting hole (23) Annular Recess (24) Annular convex (65) Cross-shaped groove (68) Retaining structure

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kihito Okui 1-21-4 Nishijuku, Minoh-shi, Osaka Fukai Industry Co., Ltd. F-term (reference) 3E084 AA02 AA12 AA24 AA39 AB05 BA01 CA01 CB02 DA01 DB13 EA04 EB02 EC10 FC01 GA08 GB19 HA03 HB02 HD01 KB01 LB02 LD29

Claims (17)

[Claims] 1. A stopper which is fitted into an opening and capable of sucking / injecting liquid using only a syringe body, wherein an insertion hole for inserting a small-diameter tube portion of the syringe body in an airtight state is provided at a center portion. And a shut-off valve for opening and closing the lower end opening of the insertion hole, the tip of the small-diameter tube of the syringe body at the end of the operation of inserting the small-diameter tube of the syringe body into the insertion hole. A plug with an on-off valve, wherein the on-off valve is pushed open to form a liquid flow path communicating the inside of the opening with the small-diameter tube portion of the syringe body. 2. The stopper main body has an insertion hole into which a small diameter tube of the syringe main body is inserted at a central portion, and a large-diameter hole continuous with the insertion hole, and a lower end opening of the insertion hole has a lower end opening. The on-off valve is formed so as to protrude into the enlarged-diameter hole portion, and is extended in the enlarged-diameter hole portion so as to close the lower end opening of the insertion hole portion of the small-diameter tube portion of the syringe body with a predetermined tightening pressure. The plug with an on-off valve according to claim 1, characterized in that: 3. The plug body includes an outer fitting member fitted into the opening, and an inner fitting member fitted into the outer fitting member.
The outer fitting member has a fitting hole in which the inner fitting member fits, and an enlarged-diameter hole continuous with the fitting hole, and the inner fitting member has an insertion hole for inserting the small-diameter tube portion of the syringe body into a central portion. 3. The device according to claim 1 or 2, wherein the end portion protrudes from the enlarged-diameter hole of the outer fitting member in a state where the inner fitting member is inserted into the outer fitting member. Plug with on-off valve. 4. The plug with an on-off valve according to claim 3, wherein the inner fitting member is made of a synthetic resin. 5. The plug with an on-off valve according to claim 1, wherein the insertion hole of the small-diameter tube portion of the syringe body is formed to be partially reduced in diameter. 6. The opening / closing device according to claim 1, wherein an insertion hole of the small-diameter tube portion of the syringe body is formed so as to correspond to an outer shape of the small-diameter tube portion of the syringe body. A plug with a valve. 7. The on-off valve includes a sheet-like film portion made of an elastic material, and a pedestal portion formed on an upper surface portion of the sheet-like film portion. The lower end opening of the insertion hole of the small diameter tube portion of the syringe body is stretched so as to close with a predetermined tightening pressure, and a liquid passage window is formed outside the closed portion of the lower end opening of the insertion hole. The pedestal portion is formed so as not to block the small diameter tube portion of the syringe body.
The plug with an on-off valve according to any one of claims 1 to 3. 8. A plug fitted into the opening and capable of sucking and injecting liquid using only the syringe body, wherein the plug inserts a small-diameter tube portion of the syringe body in an airtight state. A plug body having a hole in the center thereof, and an on-off valve for opening and closing a lower end opening of the insertion hole with a predetermined tightening pressure, wherein the plug body has an outer fitting member fitted into the opening; An inner fitting member having an insertion hole into which the small-diameter tube portion of the syringe main body is inserted at the center thereof, wherein the on-off valve is provided with a small-diameter tube portion of the syringe main body of the inner fitting member. A plate-shaped membrane that opens and closes the lower end opening of the insertion hole, and a pedestal formed on the upper surface of the plate-shaped membrane so that the small-diameter tube of the syringe body is not closed. It consists of a plurality of string-shaped hanging parts made of an elastic material, and the string-shaped hanging parts have a base at the outer edge of the plate-shaped film part. And a plate-like membrane portion is suspended so that the upper end portion is connected to the upper end portion of the inner surface of the outer fitting member and the lower end opening of the insertion hole of the small diameter tube portion of the syringe body is closed with a predetermined tightening pressure. A plug with an on-off valve that has been lowered. 9. An elastic force of at least one of the plurality of string-shaped hanging portions of the plurality of string-shaped hanging portions of the on-off valve is made larger than that of the other string-shaped hanging portions, and a lower end of the string-shaped hanging portion is provided. The opening / closing valve-equipped plug according to claim 8, wherein the plate-shaped membrane portion is opened by rotating the plate-shaped membrane portion as a hinge. 10. A plug fitted into an opening and capable of sucking and injecting liquid using only a syringe body, said plug being inserted into a small-diameter tube portion of the syringe body in an airtight state. A plug body having a hole at a central portion thereof; and an on-off valve for opening and closing a lower end opening of the insertion hole. The plug body is fitted with an outer fitting member fitted into the opening, and fitted with the outer fitting member. And an inner fitting member having an insertion hole into which a small diameter pipe portion of the syringe body is inserted at a central portion, wherein the on-off valve has a cup-shaped film portion made of an elastic material, and a cup-shaped film portion. The cup-shaped film portion is connected to the entire upper inner peripheral edge of the outer fitting member in a state where the cup-shaped film portion is fitted to the inner fitting member. The lower end opening of the insertion hole of the small-diameter tube portion of the syringe body of the inner fitting member is predetermined on the inner surface of the bottom of the membrane-shaped portion. The base is formed so as to be closed by the tightening pressure, and the small diameter pipe portion of the syringe body is not closed, and a plurality of liquid passage windows are formed on the entire peripheral surface of the cup-shaped membrane. A plug with an on-off valve. 11. The apparatus according to claim 10, wherein the width between the liquid passage windows of the cup-shaped membrane is narrowed to form a string between the adjacent liquid passage windows. Plug with on-off valve. 12. The plug body, wherein a thick ring-shaped outer fitting member fitted into the opening, an inner fitting member having a lower portion projecting downward from the outer fitting member in a state fitted to the outer fitting member, A cup-shaped film portion made of an elastic material to be fitted over the projection of the inner fitting member projecting from the outer fitting member; and forming the thick ring-shaped outer fitting member and the cup-shaped film portion integrally. The lower end opening of the insertion hole of the small-diameter tube portion of the syringe body of the inner fitting member is closed with a predetermined tightening pressure on the inner surface of the bottom of the cup-shaped membrane portion, and the base of the syringe body is formed on the base formed on the bottom upper surface. So as not to block the small diameter pipe,
The plug with an on-off valve according to claim 10, wherein a plurality of liquid passage windows are formed on a peripheral surface of the cup-shaped membrane. 13. The plug body, wherein a thick ring-shaped outer fitting member fitted into the opening, an inner fitting member having a lower part projecting downward from the outer fitting member in a state fitted to the outer fitting member, A band-shaped film portion made of an elastic material partially covering the protruding portion of the inner fitting member protruding from the outer fitting member; and forming the thick ring-shaped outer fitting member and the band-shaped film portion integrally. The distal end opening of the insertion hole of the small-diameter tube of the syringe body of the inner fitting member is closed with a predetermined tightening pressure on the inner surface of the bottom of the band-shaped membrane, and the small diameter of the syringe body is reduced by the pedestal formed on the bottom upper surface. The plug with an on-off valve according to claim 10, wherein the tube portion is not closed, and both side surfaces of the band-shaped membrane portion are formed as liquid window portions. 14. The plug body, wherein a thick ring-shaped outer fitting member fitted into the opening, an inner fitting member having a lower part projecting downward from the outer fitting member in a state fitted to the outer fitting member, A cup-shaped film portion made of an elastic material that covers a protruding portion of the inner fitting member from the outer fitting member, wherein the thick ring-shaped outer fitting member and the cup-shaped film portion are integrally formed; A plurality of liquid holes are drilled in the annular portion at the bottom of the membrane-shaped portion and in contact with the annular distal end surface of the inner fitting member, and the annular portion of the cup-shaped membrane portion in which the fluid holes are drilled. Is pressed against the annular distal end face of the inner fitting member with a predetermined tightening pressure so that the annular distal end face of the inner fitting member closes the plurality of liquid holes provided in the cup-shaped membrane portion, and the cup-shaped membrane is closed. The small-diameter tube portion of the syringe body is not closed by the pedestal portion provided on the bottom surface of the portion. Plug body with the opening and closing valve of the placement. 15. A pedestal formed on a bottom surface of the cup-shaped film portion, the pedestal formed of a plastic material, and a pedestal integrally formed on the disc. The plug with an on-off valve according to any one of 10, 12, and 13. 16. A lid is fitted into an upper end opening of an insertion hole of a small-diameter tube portion of a syringe body of an inner fitting member constituting a plug body, and the lid is formed of an elastic material. The on-off valve-equipped plug according to any one of claims 1, 3, 8, 10, and 12, wherein a cross-shaped breaking groove is provided. 17. The syringe according to claim 17, wherein an engagement groove is formed in an insertion hole of the plug with an on-off valve, and a locking projection corresponding to the engagement groove is formed in a small-diameter tube of the syringe body. 3 or 1
3. The stopper with the on-off valve according to any one of 2 and a structure for preventing the stopper from being removed from the syringe body.