JP3761411B2 - Plug body with check valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a plug body that is airtightly attached to an opening of a medicine bottle or a mixed injection tube that injects and absorbs liquid using only a syringe body, and more specifically, injects and absorbs liquid without using an injection needle. It is related with the plug body with a non-return valve which can perform.
[0002]
[Prior art]
  In general, there are a medicine bottle and a mixed injection tube for injecting and sucking liquid using a syringe. The drug bottle seals the drug solution by fitting a rubber plug into the opening, and the means for taking out the drug solution from the drug bottle sucks the rubber plug by piercing the injection needle of a syringe. The mixed injection tube is a T-shaped tube in which a branch tube is extended from the side surface of a tube body formed in a straight line, and is used for injecting a chemical solution by being incorporated in a liquid circuit such as an infusion circuit or a blood circuit. In other words, the mixed injection tube has a rubber tube of a liquid circuit connected to the opening at both ends of the tube body, and a rubber plug is fitted into the opening of the branch tube, and the injection needle of a syringe is inserted into the rubber plug portion of the mixed injection tube. Thus, the chemical solution is injected into the liquid circuit. Thus, when a rubber stopper is fitted into an opening of a medicine bottle, a mixed injection tube or the like, an injection needle must be used for injecting and sucking the medicine.
[0003]
[Problems to be solved by the invention]
  However, there is a possibility that the blood and drugs of the patient are attached to the injection needle used in the medical field, and there are problems related to disposal and hospital infection due to misuse of the used injection needle. . Regarding the disposal of injection needles, manuals and the like are prepared and strictly controlled, which is very troublesome. In addition, once used, the needle needs to be disposed of, which increases medical costs.
[0004]
  The present inventor uses an injection needle other than direct injection of a medical solution by a syringe into a patient's body, that is, when taking out a chemical solution from a drug bottle and injecting the chemical solution into an infusion circuit or an infusion circuit. Focusing on the fact that injection needles are used, the present invention is proposed from the viewpoint of reducing the use of injection needles as much as possible.
[0005]
  Although the present invention will be described using only a syringe main body without using an injection needle, the present invention can be applied to liquid suction / injection using a connector in the same procedure, and the description thereof will be omitted.
[0006]
  That is, an object of the present invention is to provide a stopper with a check valve that can suck out liquid from a medicine bottle and inject liquid into a mixed injection tube by using only a syringe body without using an injection needle. .
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, the stopper with check valve according to claim 1 of the present invention is hermetically sealed in the opening of the medicine bottle and the opening of the branch pipe of the mixed injection pipe.Fitted,Insert hole to insert small diameter tube part of syringe body into airtight stateAnd formed so that the lower end opening of the insertion hole protrudes downwardPlug body and lower end opening of the insertion holeIt was stretched on the plug body so as to close with a predetermined pressure.A check valve, and at the end of the insertion operation of the small diameter tube portion of the syringe body into the insertion hole, push the check valve at the tip of the small diameter tube portion of the syringe body to open the inside of the opening and the syringe body A liquid flow path communicating with the small-diameter pipe portion is formed.
[0008]
  In other words, the plug body with a check valve of the present invention is a plug body fitted in an opening of a medicine bottle, a mixed injection tube or the like, and a liquid is applied to the medicine bottle or the mixed injection pipe by using only the syringe body without using an injection needle. In order to allow suction and injection, an insertion hole for inserting the small diameter tube of the syringe body is formed in the center of the stopper body, and a lower end opening of the insertion hole can be opened and closed with a check valve. ing.
[0009]
  In addition,The plug body with a check valve according to claim 1, wherein the plug body has an insertion hole portion into which a small-diameter tube portion of the syringe body is inserted at a central portion, and an enlarged hole portion continuous with the insertion hole portion. And forming the lower end opening of the insertion hole so as to protrude into the enlarged diameter hole.Predetermined pressureCheck valve is stretched in the enlarged hole so that it is closed withIt is also possible to do.
[0010]
  Claim 2The plug with check valve according toClaim 1In the plug body with a check valve according to claim 1, the plug body includes an outer fitting member that fits into the opening, and an inner fitting member that fits into the outer fitting member.The outer fitting member has a fitting hole portion into which the inner fitting member is fitted, the inner fitting member has an insertion hole portion into which the small-diameter tube portion of the syringe body is inserted, and the inner fitting member is connected to the outer fitting member. The tip part protrudes below from the fitting hole part of the external fitting member in a state where the is inserted.As a result, the outer fitting member and the inner fitting member can be made of different materials.
[0011]
  Claim 2In 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. be able to.
[0012]
  Claim 1 or 2In the plug body with a check valve according to claim 1, the inner diameter portion of the insertion hole portion is partially reduced in diameter to reliably seal the small diameter tube portion of the syringe body.be able to.
[0013]
  Furthermore, claim 1 or 2In the plug body with a check valve according to claim 1, 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.Can also.
[0014]
  Claim 3The plug with check valve according toClaim 1 or 2In the plug body with a check valve according to claim 1, the check 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 membrane part is the lower end opening part of the insertion hole part of the small diameter pipe part of the syringe body of the stopper body.Predetermined pressureThe liquid passage window is formed outside the closed portion of the lower end opening of the insertion hole, and the pedestal does not block the small diameter tube of the syringe body. It is formed as follows.
[0015]
  The check valve is elastically pushed at the end of the insertion operation of the small-diameter tube portion of the syringe body into the insertion hole by making the sheet-like membrane portion with an elastic material, and the inside of the opening When the small-diameter tube portion of the syringe main body communicates with the small-diameter tube portion of the syringe main body and the small-diameter tube portion of the syringe main body is extracted from the insertion hole portion, the check valve is elastically restored to close the lower end opening of the insertion hole portion.
[0016]
  Further, a liquid passage window portion serving as a liquid flow path is formed on the outer edge portion of the sheet-like film portion or in the vicinity thereof, that is, outside the closed portion of the lower end opening portion of the insertion hole portion.
[0017]
  The pedestal portion is formed at the center of the upper surface of the sheet-like film portion so as not to block the tip of the small diameter tube portion when the check valve is pushed in with the small diameter tube portion of the syringe body. For example, the shape of the pedestal part is a disk body having a larger diameter than the small diameter tube part of the syringe body, and the upper surface part of the disk body is formed with a concave groove part over the entire width, or the diameter of the small diameter tube part of the syringe body If it is a long and narrow rectangular body whose diameter is narrower than the diameter of the small-diameter tube portion, when the tip of the small-diameter tube portion of the syringe body is brought into contact with the upper surface portion of the pedestal portion, the small-diameter tube portion of the syringe main body The tip is not occluded.
[0018]
  Claim 4The plug with check valve according toThe plug with check valve according to claim 1,Fit into openingAndInsert hole to insert small diameter tube part of syringe body into airtight stateAnd formed so that the lower end opening of the insertion hole protrudes downwardPlug body and lower end opening of the insertion holeIt was stretched on the plug body so as to close with a predetermined pressure.The stopper body includes an outer fitting member that fits into the opening, and an insertion hole portion that fits into the outer fitting member and into which the small-diameter pipe portion of the syringe body is inserted at the center portion. The check valve has a plate-like film portion that opens and closes the lower end opening of the insertion hole portion of the small-diameter tube portion of the syringe body of the internal fitting member, and the small-diameter tube portion of the syringe body closes. The pedestal is formed on the upper surface of the plate-like film portion and a plurality of string-like suspensions made of an elastic material, and the string-like suspension has a plate-like base. The lower end opening of the insertion hole portion of the small diameter tube portion of the syringe body is connected to the outer edge portion of the membrane portion and the upper end portion is connected to the upper end portion of the inner surface of the outer fitting member.Predetermined pressureThe plate-like film part is suspended so as to be closed at the same time, and the plate-like film part is brought into pressure contact with the insertion hole part by the elastic force of the string-like hanging part.
[0019]
  Claim 5The plug with check valve according toClaim 1In the plug body with a check valve described inA stopper body that is fitted in the opening and has an insertion hole for inserting the small-diameter tube portion of the syringe body in an airtight state, and the lower end opening of the insertion hole is formed to protrude downward; and the insertion hole A check valve stretched on the stopper main body so as to close the lower end opening of the stopper with a predetermined pressure, and the stopper main body is fitted to the opening. A member and an inner fitting member that is fitted to the outer fitting member and has an insertion hole portion into which a small-diameter tube portion of the syringe main body is inserted at a central portion, and the check valve is a syringe main body of the inner fitting member The plate-like film part that opens and closes the lower end opening of the insertion hole part of the small-diameter pipe part and a plurality of string-like suspension parts made of an elastic material, and the string-like suspension part has the base part as a plate-like film part A plate-like membrane portion that is connected to the outer edge portion of the syringe body and has an upper end portion connected to an upper end portion of the inner surface of the outer fitting member to close the lower end opening portion of the insertion hole portion of the small-diameter tube portion of the syringe body with a predetermined pressure. Hanging,The elastic force of at least one of the plurality of string-like suspensions is made larger than that of the other string-like suspensions, and elasticity is achieved at the end of the insertion operation of the insertion hole portion of the small diameter tube portion of the syringe body. The insertion hole is opened by rotating the plate-like film part around the lower part of the string-like suspension part having a large force.
[0020]
  Claim 6The plug with check valve according toThe plug with check valve according to claim 1,Fit into openingAndInsert hole to insert small diameter tube part of syringe body into airtight stateAnd formed so that the lower end opening of the insertion hole protrudes downwardPlug body and lower end opening of the insertion holeIt was stretched on the plug body so as to close with a predetermined pressure.The stopper body includes an outer fitting member that fits into the opening, and an insertion hole portion that fits into the outer fitting member and into which the small-diameter tube portion of the syringe body is inserted at the center portion. The check valve is composed of a cup-shaped film part made of an elastic material and a base part formed on the upper surface of the bottom of the cup-shaped film part, and the cup-shaped film part Is inserted into the small diameter tube part of the syringe body of the inner fitting member with the upper whole circumferential edge connected to the upper whole inner circumferential edge of the outer fitting member while being fitted to the inner fitting member. The lower end opening of the holePredetermined pressureThe pedestal portion is formed so as to block the small diameter tube portion of the syringe body, and a plurality of liquid passing window portions are formed on the entire peripheral surface of the cup-shaped film portion. And
[0021]
  Claim 7The plug with check valve according toClaim 6In the plug body with a check valve according to claim 1, the width between the liquid passage window portions of the cup-shaped membrane portion is narrowed to form a string portion between the adjacent liquid passage window portions. .
[0022]
  Claim 8The plug with check valve according toClaim 6In the plug body with a check valve according to claim 1, a thick ring-shaped outer fitting member in which the plug main body is fitted in the opening, and an inner portion in which the lower portion protrudes downward from the outer fitting member while being fitted in the outer fitting member. With fitting membersConsists ofA cup-shaped film portion made of an elastic material that covers the protruding portion of the inner fitting member protruding from the outer fitting member.TheThe thick ring-shaped outer fitting memberWhenThe lower end opening of the insertion hole portion of the small diameter tube portion of the syringe body of the inner fitting member is formed integrally with the bottom inner surface of the cup-shaped membrane portion.Predetermined pressureThe small diameter tube portion of the syringe body is not blocked by the pedestal portion formed on the upper surface of the bottom portion, and a plurality of liquid passing window portions are formed on the peripheral surface of the cup-shaped membrane portion. It is characterized by.
[0023]
  Claim 9The plug with check valve according toClaim 6In the plug body with a check valve described inBoth side surfaces of the cup-shaped film part are cut to form a band-shaped film part, and the opening formed by this cut is used as a liquid window part.It is characterized by that.
[0024]
  Claim 10The plug with check valve according toClaim 1In the plug body with a check valve described inA stopper body that is fitted in the opening and has an insertion hole for inserting the small-diameter tube portion of the syringe body in an airtight state, and the lower end opening of the insertion hole is formed to protrude downward; and the insertion hole A check valve stretched on the plug body so as to close the lower end opening at a predetermined pressure, and the plug body is fitted to the outer fitting member fitted into the opening, the outer fitting member, And an inner fitting member having an insertion hole portion into which the small diameter tube portion of the syringe main body is inserted in the central portion, and the check valve includes a cup-shaped membrane portion made of an elastic material and a bottom portion of the cup-shaped membrane portion. A pedestal part formed on the upper surface, the cup-shaped film part is connected to the upper entire inner periphery of the outer fitting member in the state where the upper entire peripheral edge is covered with the inner fitting member,A plurality of liquid passage holes are formed in an annular portion that is in contact with the annular front end surface of the inner fitting member at the bottom of the cup-shaped film part, and the annular shape of the cup-shaped film part in which the liquid passage holes are formed. Place the part on the annular tip of the internal fittingPredetermined pressureThe small diameter of the syringe body is reduced by the base part provided on the bottom surface of the cup-shaped film part so as to close the plurality of liquid passage holes provided in the cup-shaped film part with the annular tip surface of the inner fitting member The tube portion is not blocked.
[0025]
  Claim 11The plug with check valve according toClaims 6-10In the plug body with a check valve according to any one of the above, a disk body formed of a plastic material with a pedestal formed on the upper surface of the bottom of the cup-shaped film part, and a pedestal formed integrally on the disk body It is characterized by comprising.
[0026]
  Claim 12The plug with check valve according toClaims 1-11In the plug body with a check valve according to any one ofInsertion hole of plug bodyAt the top opening ofA lid made of an elastic material to be fitted,Cross break groove on one sideProvidedIt is characterized by that.
[0027]
  Each of the aboveThe plug body with check valve,An engagement groove is formed in the insertion hole, and a locking projection corresponding to the engagement groove is formed in the small diameter tube of the syringe body.Thus, a structure for preventing the syringe body from coming off can be obtained.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of a plug body 1 with a check valve according to the present invention will be described with reference to the drawings.
[0029]
  FIG. 1 shows a plug body 1 with a check valve according to a first embodiment of the present invention. FIG. 1 (A) is a plan view, and FIG. 1 (B) is a view of FIGS. 1 (A) and (C). FIG. 2C is a bottom view, FIG. 2 is an enlarged view of FIG. 1B, FIG. 3 is an enlarged view of the check valve 3, and FIG. FIG. 4B is a cross-sectional view taken along line A-A in FIG. 4A, and FIG. 4 is an operation explanatory diagram of the plug body 1 with a check valve.
[0030]
  As shown in FIGS. 1 (B) and 2, the stopper body 1 with a check valve is composed of a stopper body 2, a check valve 3, a lid body 4 and a covering member 5, and is used for a medicine bottle or a mixed injection tube. It is airtightly attached to the opening 6 so that the inside and outside of the medicine bottle and the mixed injection tube can be communicated and cut off.
[0031]
  The stopper body 2 is made of an elastic material such as rubber, and is fitted into an opening 6 of a medicine bottle or a mixed injection tube, as shown in FIGS. An insertion hole portion 7 and an enlarged diameter hole portion 8 of the small-diameter pipe portion 11 (FIG. 4) are formed, and a flange portion 9 is formed outwardly at the outer peripheral portion of the upper end.
[0032]
  The insertion hole portion 7 is a portion into which the small-diameter tube portion 11 (FIG. 4) of the syringe main body 10 is inserted, and a fitting portion 12 into which the lid body 4 is fitted is formed at the inner edge of the upper end. The diameter is partially reduced in order 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.
[0033]
  A lower end opening 7 a of the insertion hole 7 projects into the enlarged diameter hole 8, and a lower end opening 7 a of the insertion hole 7.TheA check valve 3 is stretched for closing. 1 and 2, the lower end opening 7 a of the insertion hole 7 is a check valve 3.Predetermined pressureThis check valve 3 blocks the insertion hole 7 and the enlarged-diameter hole 8 connected to the medicine bottle or the mixed injection tube.
[0034]
  The flange portion 9 is locked to the upper end surface of the opening portion 6 to prevent the plug body 2 from entering the opening portion 6 when the plug body 2 is fitted into the opening portion 6 such as a medicine bottle. The plug body 2 is extended outward from the upper end of the outer periphery of the plug body 2 so as to be able to do so. In addition, an annular rib 13 that seals the upper end surface of the opening 6 is formed on the lower surface side of the flange portion 9, so that the liquid inside the medicine bottle has an outer periphery of the stopper body 2 and an inner periphery of the opening 6. To prevent leakage from between. The annular rib 13 may be manufactured separately from a material different from that of the plug body 2, and in this case, a groove into which the annular rib 13 can be fitted is preferably formed on the lower surface side of the flange portion 9.
[0035]
  In the present embodiment, an example in which there is a slight gap between the outer peripheral portion of the plug body 2 and the inner peripheral portion of the opening 6 is illustrated. However, the outer diameter of the plug body 2 and the inner diameter of the opening 6 are the same. Alternatively, the outer diameter of the plug body 2 may be 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 so that the plug body 2 can be elastically deformed and screwed into the opening 6. .
[0036]
  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. Has been. The sheet-like film portion 14 is stretched in the diameter-expanded hole portion 8 so as to close the lower end opening portion 7a of the insertion hole portion 7 of the plug body 2, and from the closing portion of the lower end opening portion 7a of the insertion hole portion 7. A liquid passage window 16 is formed on the outside. The pedestal portion 15 is formed with a concave groove portion 17 across the entire width from the top surface portion to the bottom portion of the disc body, and is a syringe that fits in the lower end opening portion 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 portion 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 main body 10 inserted into the insertion hole portion 7 is not blocked. Instead of this, a rectangular base (not shown) may be used. This rectangular base portion has a length longer than the diameter of the small-diameter tube portion 11 of the syringe body 10, shorter than the hole diameter of the lower end opening 7 a of the insertion hole portion 7, and a width of the small-diameter tube of the syringe body 10. If it is narrower than the diameter of the part 11, the small diameter tube part 11 of the syringe body 10 can be prevented from being blocked.
[0037]
  In the check valve 3, the sheet-like membrane portion 14 and the pedestal portion 15 may be integrally made of an elastic material such as rubber, or the pedestal portion 15 produced separately from the sheet-like membrane portion 14 is provided. You may make it integral by means, such as adhesion | attachment and welding. In the latter case, the material of the pedestal portion 15 need not be limited to an elastic material such as rubber, and may be an inelastic synthetic resin or the like as long as the injection needle 18 (FIG. 5) can be easily pierced. .
[0038]
  As shown in FIGS. 1B and 2, the lid body 4 is fitted into the fitting portion 12 formed at the upper end opening of the insertion hole portion 7, so that dusts enter the insertion hole portion 7. It is preventing. Naturally, when inserting the small diameter tube portion 11 of the syringe main body into the insertion hole portion 7, the lid body 4 is removed from the fitting portion 12 of the plug body 2. The lid 4 may be pivotally attached to the plug body 2 or the covering member 5, or may be manufactured separately from the plug body 2 or the covering member 5. The same size is desirable. In addition, if a suitable handle part (not shown) is formed in the upper surface part of the cover body 4, the cover body 4 can be easily removed from the fitting part 12. FIG.
[0039]
  The covering member 5 is made of a metal such as aluminum as a plastic material or a synthetic resin as a thermoplastic material, as shown in FIGS. 1 and 2, and prevents the plug body 2 from being detached from the opening 6. is there. Further, when the flange portion 9 is crimped to the upper end surface of the opening 6 to such an extent that the annular rib 13 is elastically deformed, the covering member 5 comes into airtight contact with the upper end surface of the opening 6, and the plug body 2. The liquid leakage from between the outer peripheral portion of the opening and the inner peripheral portion of the opening 6 can be reliably prevented.
[0040]
  Next, operation | movement of the plug body 1 with a non-return valve concerning a 1st Example is demonstrated using FIG. First, after removing the cover body 4 from the plug body 1 with a check valve, the small-diameter pipe section 11 of the syringe body 10 is inserted into the insertion hole section 7. By inserting the pedestal 15 of the check valve 3 with the tip 11a of the small diameter pipe 11 at the end of the insertion operation of the small diameter pipe 11, the sheet-like membrane 14 and the insertion hole of the check valve 3 are inserted. 7 can be elastically separated from the lower end opening 7a. As a result, a liquid channel (chain 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.
[0041]
  For example, as shown by the chain line in FIG. 4, the liquid flow path when injecting liquid from the opening 6 includes the small-diameter pipe portion 11 of the syringe body 10, the concave groove portion 17 of the pedestal portion 15 of the check valve 3, A gap between the sheet-like membrane portion 14 of the valve 3 and the lower end opening 7 a of the insertion hole 7, the liquid passage window portion 16 of the check valve 3, and the inside of the opening portion 6 are formed in this order. Also, the liquid flow path for sucking the liquid from the opening 6 is omitted because it is only in the reverse order of the liquid flow path for injecting the liquid. In addition, what is necessary is just to orient | assign the opening part 6 below so that the liquid may be filled in the enlarged diameter hole part 8, when sucking a liquid from the opening part 6 of a medicine bottle.
[0042]
  Further, since the inner peripheral surface of the insertion hole portion 7 is partially reduced in diameter, when the small diameter tube portion of the syringe body is inserted into the insertion hole portion 7, the outer peripheral surface of the small diameter tube portion 11 is sealed. it can. Therefore, liquid leakage from between the small-diameter tube portion 11 and the insertion hole portion 7 of the syringe body 10 can be prevented when injecting and sucking liquid.
[0043]
  As described above, the plug body 1 with a check valve according to the first embodiment sucks liquid from the opening 6 such as a medicine bottle by using only the syringe main body 10 without using the injection needle, or of the mixed injection tube. Liquid can be injected from the opening 6.
[0044]
  Further, in the plug body 1 with a check valve 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 plug or the like. Therefore, the liquid medicine can be sucked and injected by the syringe 19 equipped with the injection needle 18. In FIG. 5, the lid 4 is also made of a material that can be pierced by the injection needle 18.
[0045]
  FIG. 6 shows a plug 1 with a check valve according to a first modification of the first embodiment. As shown in FIG. 6, the plug body 1 with a check valve according to this modification is formed so that the inner peripheral surface shape of the insertion hole portion 7 corresponds to the shape (taper shape) of the small diameter tube portion 11 of the syringe body 10. And the point that the plug body 2 is composed of an outer fitting member 20 and an inner fitting member 21 are different from those of the first embodiment. In other respects, the check valve according to the first embodiment is different. Since it is the same as that of the plug body 1, the same parts are denoted by the same reference numerals and the description thereof is omitted.
[0046]
  That is, the plug body 1 with a check valve according to the modified example shown in FIG. 6 is formed by forming the insertion hole portion 7 corresponding to the shape (tapered shape) of the small diameter tube portion 11 of the syringe body 10. The small-diameter pipe portion 11 can be reliably sealed, and the check valve 3 can be prevented from being damaged by inserting the small-diameter pipe portion 11 into the insertion hole 7 too much.
[0047]
  The plug body 2 includes an outer fitting member 20 that fits into the opening 6 and an inner fitting member 21 that fits into the outer fitting member 20. The outer fitting member 20 has a fitting hole portion 22 for fitting the inner fitting member 21 and a diameter-expanded hole portion 8 continuous with the fitting hole portion 22, and the inner fitting member 21 has a syringe main body 10 at the center. The small-diameter pipe portion 11 is inserted, and the inner fitting member 21 is inserted into the outer fitting member 20 in a state where the inner fitting member 21 is inserted into the outer fitting member 20. 8 protrudes.
[0048]
  That is, in the plug body 1 with a check valve, the outer fitting member 20 and the inner fitting member 21 can be made of different materials by dividing the plug body 2 into the outer fitting member 20 and the inner fitting member 21. 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 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 can be prevented from being elastically contracted. That is, if the hole diameter of the insertion hole portion 7 is contracted, the insertion operation of the small diameter tube portion 11 of the syringe body 10 into the insertion hole portion 7 is hindered. Therefore, it is desirable that the inner fitting member 21 is made of a rigid material such as synthetic resin. . Synthetic resin is suitable as a material for the inner fitting member 21 because it is less reactive to chemicals than a rigid material such as metal, is lightweight, and is inexpensive.
[0049]
  In addition, an annular recess 23 and an annular projection 24 that are engaged with each other are formed in the fitting hole portion 22 of the outer fitting member 20 and the outer surface portion of the inner fitting member 21. The retaining action of the fitting member 21 is exhibited.
[0050]
  FIG. 7 shows a plug body 1 with a check valve according to a second modification of the first embodiment, which is substantially the same as the plug body with a check valve according to the second modification. The same parts are denoted by the same reference numerals and description thereof is omitted. In FIG. 7, the plug body 2 includes a cylindrical outer fitting member 20 that fits into the opening 6 and an inner fitting member 21 that fits into the outer fitting member 20. The inner fitting member 21 has an insertion hole portion 7 into which the small diameter tube portion 11 of the syringe main body 10 is inserted at the center, and the inner fitting member 21 and the outer fitting member 20 are in a state of being incorporated in the outer fitting member 20. An enlarged hole portion 8 is formed between them.
[0051]
  The check valve 3 has a pedestal portion 15 that fits into the insertion hole 7 in the center portion, and the entire periphery of the sheet-like film portion 14 having the liquid passage window portion 16 on the outer periphery. It is welded or bonded to the upper part of the inner peripheral surface of the fitting member 20. That is, the pedestal 15 at the center is placed in the insertion hole 7.Predetermined pressureTighten to fit in. A groove portion 17 is formed on the upper surface of the pedestal portion 15 so that the small diameter tube portion 11 is not blocked when the small diameter tube portion 11 of the syringe body 10 is inserted into the insertion hole portion 7. The state of the chain edge indicates a state in which the sheet-like film portion 14 is opened by the small diameter tube portion 11 of the syringe body 10.
[0052]
  Next, FIG.8 and FIG.9 has shown the plug body 1 with a non-return valve which concerns on the 2nd Example of this invention. The plug body 1 with a check valve is different from the first embodiment in the structure of the check valve 3, and is otherwise the same as the plug body 1 with a check valve according to the embodiment. The same parts are denoted by the same reference numerals and description thereof is omitted. In addition, FIG. 8 shows the case where the stopper 1 with a check valve is attached to the opening 6 of the mixed injection tube.
[0053]
  The inner fitting member 21 constituting the plug body 2 of the plug body 1 with the check valve according to the second embodiment is formed with a flange portion 25 that is engaged with the upper end surface of the outer fitting member 20. Is formed with an engagement hole 27 through which a protrusion 26 formed on the upper end surface of the outer fitting member 20 is inserted. The outer shape of the outer fitting member 20 is formed in a shape corresponding to the inner shape of the opening 6.
[0054]
  Further, as shown in FIG. 9, the check valve 3 of the plug body 1 with a check valve includes a plate-like film portion 28 that closes the lower end opening portion 7 a of the insertion hole portion 7 of the inner fitting member 21, and a pedestal portion. 29 and a string-like suspended portion 30. Unlike the other embodiments, the plate-like film portion 28 may be made of a rigid material such as a synthetic resin, and a pedestal portion 29 is formed at the center of the upper surface thereof. 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 at a portion that contacts the lower end opening 7a of the inner fitting member 21, and the lower end opening 7a and the plate in the closed state are stretched. With the film-shaped film portion 28air tightnessIt is necessary to make sure. The pedestal portion 29 is formed by forming a cross-shaped groove portion 31 in a truncated cone shape, and is formed so as not to block the small-diameter tube portion 11 of the syringe body 10 as in the other embodiments described above. Further, four string-like suspension parts 30 made of an elastic material such as rubber are connected to the outer edge of the plate-like film part 28 at equal intervals.
[0055]
  As shown in FIGS. 8A and 8B, the string-like suspended portion 30 connects one end portion to the outer edge portion of the plate-like film portion 28 and the other end portion to the inner peripheral surface of the outer fitting member 20. By connecting to the upper end portion of the inner member, the plate-like film portion 28 is made into the lower end opening portion 7a of the insertion hole portion 7 of the inner fitting member 21 as shown in FIG.Predetermined pressureTherefore, it is airtightly contacted.
[0056]
  As shown in FIG. 8B, the plug body 1 with a check valve is inserted into the insertion hole 7 with the small diameter tube portion 11 of the syringe body 10, and the check valve 3 has a plate shape at the end of the insertion operation. The film portion 28 is pushed through the pedestal portion 29 so that the lower end opening portion 7 a of the insertion hole portion 7 and the opening portion 6 communicate with each other through the gap 32 between the string-like suspension portions 30. That is, the liquid flow window portion of the check valve 3 in the second embodiment is formed by a gap 32 between the string-like suspension portions 30.
[0057]
  A plug body 1 with a check valve shown in FIG. 10 is a modification of the second embodiment shown in FIGS. 8 and 9, and is one of the four string-like suspension parts 30 of the check valve 3. The suspending portion 30a has a larger elastic force than the other suspending portions 30, and the pedestal portion is not formed on the plate-like film portion 28. As shown in FIGS. 10A and 10B, the check valve 3 includes a plate-like film portion 28 made of a rigid material such as synthetic resin, three string-like hanging portions 30, and an elastic force. It is comprised with one big string-like suspension part 30a. That is, when the check valve plug 1 is inserted into the insertion hole 7 and the check valve 3 is pushed into the insertion hole 7, the plug 1 with the check valve is suspended as shown in FIG. 10 (B). Since the elastic force of the lower part 30a is large, it is difficult to extend as compared with other string-like hanging parts 30, and the plate-like film part 28 is rotated around the lower end 30a 'of the string-like hanging part 30a as the center of rotation. A liquid flow path is formed.
[0058]
  FIGS. 11 and 12 show a third embodiment, which differs from the second embodiment in that the check valve 3 is constituted by the cup-shaped membrane portion 33 shown in FIGS. 11 (A) and 11 (B). Yes. As shown in FIG. 11 (A), the cup-shaped film portion 33 has a shape that covers the outer peripheral surface portion 21a and the lower end opening 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 surface portion 34 of the cup-shaped film portion 33, and the bottom surface portion 34 of the peripheral wall portion 35 of the cup-shaped film portion 33. A plurality of liquid passing window portions 36 are formed in the upper part from the top. As shown in FIG. 12A, the cup-shaped film portion 33 adheres or welds the upper entire periphery to the upper inner periphery of the outer fitting member 20 while being fitted to the inner fitting member 21. FIG. 12B is a view showing a state in which the small diameter tube portion 11 of the syringe main body 10 is inserted into the insertion hole portion 7 of the internal fitting member 21 when the liquid is injected. The cup-shaped film portion 33 is the small diameter tube portion 11. The liquid passage window 36 is extended downward to the position below the lower end opening 7a of the insertion hole 7 of the internal fitting member 21 as a result of being extended downward via the pedestal 29 in relation to the insertion operation of A liquid flow path indicated by an arrow communicating the small diameter tube portion 11 and the opening 6 of the syringe main body 10 is formed, so that liquid can be injected. As shown in FIG. 11 (B), when the interval between the liquid passing window portions 36 of the cup-shaped thin film portion 33 is narrowed, the portion between the adjacent liquid passing window portions 36 becomes a string-like suspended portion, The same effect as the check valve 3 of the second embodiment is exhibited.
[0059]
  FIG. 13 shows a first modification of the third embodiment, in which the plug body 2 is fitted with the opening 6 of the co-injection tube and integrally has a cup-shaped film portion 37 extending downward from the inner peripheral edge. The outer ring fitting member 38 and the thick ring outer fitting member 38 are fitted, and the lower half portion projects downward from the outer fitting member 38 and is covered with the cup-shaped film portion 37. The inner fitting member 39 is provided. 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 block the small-diameter tube portion 11 of the syringe body 10, and a plurality of liquid passages are provided on the peripheral side surface of the cup-shaped membrane portion 37. A window portion 41 is formed.
[0060]
  13A shows a state where the check valve 3 closes the lower end opening 7a of the insertion hole 7, and FIG. 13B shows that the small-diameter pipe 11 of the syringe body 10 is inserted into the insertion hole 7. Then, the cup-shaped film part 37 is extended downward through the pedestal part 40, and the liquid passage window part 41 is opened and a fluid path is formed as shown by the arrows.
[0061]
  FIG. 14 shows a second modification of the third embodiment. As shown in FIG. 14C, both side surfaces of the cup-shaped film portion 43 extending downward from the lower portion of the thick ring-shaped outer fitting member 42. Is formed into a band-shaped film portion, and an opening formed by this cutting is formed as a liquid window portion 44. A pedestal portion 45 is provided on the bottom upper portion of the band-shaped film portion 43 so that the small-diameter tube portion 11 of the syringe body 10 is not blocked.
[0062]
  FIG. 14 (A) shows a closed state, and FIG. 14 (B) shows that the band-like film portion 43 is pushed down through the pedestal portion 45 by the insertion operation of the small diameter tube portion 11 of the syringe body 10, A state is shown in which a liquid flow path indicated by an arrow communicating with the small-diameter pipe portion 11 and the opening portion 6 of the mixed injection pipe is formed through the horizontal groove portion 46 of 45 and the liquid passage window portion 44 formed by cutting.
[0063]
  FIG. 15 shows a third modification of the third embodiment of the plug body 1 with a check valve according to the present invention, in which the plug body 2 has a cup-shaped membrane at the lower part fitted in the opening 6 of the mixed injection pipe. An outer fitting member 48 having a portion 47 and a cylindrical inner fitting member 49 fitted to the outer fitting member 48. The outer fitting member 48 can be expanded and contracted, for example, an elastic material such as rubber. Molded with
[0064]
  In the outer fitting member 48, the annular portion 50 of the upper edge portion is fitted to the step portion of the opening 6, and the lower portion from the annular portion 50 is a cup-shaped film portion 47, and the bottom portion 51 A pedestal portion 53 that fits into the cylindrical portion 52 of the inner fitting member 49 is formed at the center. 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 main body 10 abuts. Reference numeral 56 denotes a bottom portion 51 of the cup-shaped film portion 47 of the outer fitting member 48 and an annular portion of the bottom surface of the annular groove portion 57 between the inner wall surface of the cup-shaped film portion 47 and the outer peripheral surface of the pedestal portion 53. A plurality of liquid passage holes drilled in 57a.
[0065]
  The inner fitting member 49 includes a cylindrical part 52 that fits into the outer fitting member 48, an annular part 50 on the upper part of the outer fitting member, a cap part 58 that covers the upper part of the opening 6, and an opening part on the upper part of the cylindrical part 52. It consists of the fitting part 59 of the cover body 4 provided in this.
[0066]
  Reference numeral 60 denotes an intermediate lid that is fitted to 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 pipe portion 11 of the syringe body 10 is provided in the central portion. The peripheral edge portion is clamped and fixed by the cap portion 58 and the inner lid body 60 so that the lid body 4 can be reliably broken by the small-diameter pipe portion 11 of the syringe body.
[0067]
  Reference numeral 62 denotes an outer lid body that covers the mounting portion of the inner lid body 60, and one location on the outer peripheral edge is attached to the cap portion 58 so as to be opened and closed by a hinge 63. Reference numeral 64 denotes a knob for opening and closing the outer lid.
[0068]
  FIG. 15A shows the closed state of the check valve 3, and the cylindrical portion 52 of the inner fitting member 49 is formed by the inner wall surface of the cup-shaped portion 47 of the outer fitting member 48 and the outer peripheral surface of the pedestal portion 53. The annular portion 57 a that is fitted in the annular groove portion 57 that is formed and has the liquid passage hole 56 formed at the bottom of the cup-shaped film portion 47 is formed on the annular distal end surface 52 a of the cylindrical portion 52 of the inner fitting member 49.Predetermined pressurePress with. As a result, the liquid passage hole 56 of the cup-shaped film portion 47 is blocked by the annular tip surface 52a of the cylindrical portion 52, and the liquid passage is blocked.
[0069]
  When injecting the liquid, as shown in FIG. 15B, the outer lid body 62 is opened, the small-diameter tube portion 11 of the syringe body is inserted from the hole of the inner lid body 60, the lid body 4 is pierced, and the outer fitting is performed. The cup-shaped film portion 47 of the outer fitting member 48 is pushed downward via the support portion 54 on the upper surface of the base portion 53 of the 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 internal fitting member 49, and the cup shape Between the pedestal portions 53 of the film portion 47 and the liquid passage holes 56 of the cup-shaped film portion 47 are connected to form a liquid passage shown by an arrow.
[0070]
  The pedestal portion 40 provided on the upper surface of the bottom of the cup-shaped film portion 37 shown in FIG. 13 is an integrally formed product of a disc body 40a and a pedestal 40b, and the pedestal portion 40 is formed of a plastic material to form the syringe body 10. The deformation of the contact surface with the tip of the small-diameter pipe portion 11 is prevented, and the liquid channel is ensured satisfactorily. In addition, you may apply the said base part to the base part of the said other Example.
[0071]
  FIG. 16 shows a modified example of the lid 4, as shown in FIGS. 16A and 16B, a cross-shaped breaking groove 65 is preliminarily formed on the lower surface 4 a of the lid 4. The lid 4 is made of a fragile rubber elastic body or plastic elastic body. At the time of use, as shown in FIG. 17, when the lid 4 is struck by the small diameter tube portion 11 of the syringe body 10, the lid 4 is moved along the cross-shaped breaking groove 65 by the arrow in FIG. 16 (A) or FIG. Fracture in the direction shown. In addition, when using the cover with a groove for a fracture | rupture in this cross shape, as shown in FIG. 17, it is preferable to make it the state which pinched | interposed and fixed the periphery of the cover body 4 with the cap part 58 and the inner cover 60. FIG. When the lid body 4 provided with the cross-shaped breaking groove 65 is used, it is clean, it is easy to determine whether it is unused or used, and there is a bite due to rubber-like elasticity, which prevents it from coming off.
[0072]
  FIG. 18 is different from the plug body 1 with the check valve according to the first to third embodiments in that the retaining structure 68 is formed in the insertion hole portion 7 and the small diameter tube portion 11 of the syringe body 10. Regarding the points, the same parts are denoted by the same reference numerals, and the description thereof is omitted. In addition, FIG. 18 shows what is based on the plug body 1 with the check valve of the first embodiment, and illustration of the other embodiments is omitted.
[0073]
  The retaining structure 68 includes an engaging groove 69 formed in a spiral shape from the upper end of the insertion hole 7 of the plug body 1 with a check valve, and the insertion hole 7 on the outer periphery of the small-diameter tube 11 of the syringe body 10. The engaging projection 70 is formed so as to correspond to the engaging groove 69. The locking projection 70 may be formed so as to be able to be screwed into the engagement groove 69. In FIG. 18, two locking projections 70 are formed. When the retaining structure 68 is provided in this manner, the small diameter tube portion 11 of the syringe body 10 can be prevented from being naturally removed from the insertion hole portion 7, and the liquid can be easily injected and sucked by the syringe body 10.
[0074]
  When the stopper body with a check valve according to the present invention is attached to a mixed injection tube incorporated in a blood circuit, the tightening pressure of the check valve is set.Predetermined pressureIt is necessary to set to become. That is, there are a positive pressure side line and a negative pressure side line in the blood circuit. In particular, in the negative pressure side line, a negative pressure acts in a direction to separate the membrane part that is in pressure contact with the lower end opening of the insertion hole. The negative pressure generated in the blood circuit is usually about 1 kg / cm2. Therefore, the check valve incorporated in the plug according to the present invention has a sheet-like membrane portion in the first embodiment so that the clamping pressure sufficiently overcomes the negative pressure of 1 kg / cm @ 2 acting in the direction of pulling off. It is necessary to set the sticking force, the elastic force of the string-like suspension in the second embodiment, and the elastic force of the cup-shaped film portion in the third embodiment.
[0075]
【The invention's effect】
  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, the injection can be performed only with the syringe body without using the injection needle. Further, according to the present invention, since the liquid can be injected and sucked even if the injection needle is used, the use of the injection needle can be selected according to the use of the liquid.
[Brief description of the drawings]
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. 1A, and FIG. is there.
FIG. 2 is an enlarged view of FIG.
3A is a plan view of a check valve of a plug with a check valve in the first embodiment, and FIG. 3B is a sectional view taken along line AA in FIG.
FIG. 4 is an operation explanatory view of the plug with check valve according to the first embodiment.
FIG. 5 is an explanatory diagram of a specific usage example of the plug with check valve according to the first embodiment.
FIG. 6 is a cross-sectional view of an axial center of a plug body with a check valve according to a first modification of the first embodiment of the present invention.
FIG. 7 is a sectional view including a shaft center of a plug body with a check valve according to a second modification of the first embodiment of the present invention.
FIG. 8 is a cross-sectional view of an axial center of a stopper body with a check valve according to a second embodiment of the present invention. FIG. 8 (A) is a view when the check valve is in a closed state, and FIG. It is operation | movement explanatory drawing.
FIG. 9A is a cross-sectional view of a shaft including a check valve of a check valve-equipped plug body according to a second embodiment, and FIG. 9B is a plan view of FIG. 9A.
FIGS. 10A and 10B are cross-sectional views including a shaft center showing a modified example of the plug body with a check valve according to the second embodiment, wherein FIG. 10A is a drawing of the check valve in a closed state, and FIG. It is explanatory drawing.
FIGS. 11A and 11B are explanatory views of a check valve of a plug body 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 film portion; FIGS. is there.
FIGS. 12A and 12B are cross-sectional views of a plug body 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.
FIGS. 13A and 13B are first modified examples of the third embodiment of the present invention, in which FIG. 13A is a cross-sectional view showing a closed state of a check valve, and FIG. 13B is an explanatory view of its operating state; is there.
FIGS. 14A and 14B are second modified examples of the third embodiment of the present invention, in which FIG. 14A is a cross-sectional view showing a closed state of a check valve, and FIG. 14B is an explanatory view of its operating state; is there. (C) is a perspective view of a check valve composed of a strip-shaped film portion.
FIGS. 15A and 15B are third modified examples of the third embodiment according to the present invention, in which FIG. 15A is a cross-sectional view showing a closed state of a check valve, and FIG. It is.
16A and 16B are explanatory views of a lid body of a plug body with a check valve according to the present invention, wherein FIG. 16A is a cross-sectional view, and FIG. 16B is a bottom view.
FIG. 17 is a cross-sectional view showing the operating state of the lid of the stopper with a check valve according to the present invention.
18 is a drawing showing a stopper structure for a stopper with a check valve according to the present invention. FIG.
[Explanation of symbols]
(1) Plug body with check valve
(2) Plug body
(3) Check valve
(4) Lid
(5) Covering member
(6) Opening
(7) Insertion hole
(8) Expanded hole
(9) Flange
(10) Syringe body
(11) Small diameter pipe
(14) Sheet-like film part
(15), (29), (40), (45), (53) pedestal
(16), (32), (36), (41), (44), (56) Liquid passage window
(20), (38), (42), (48) external fitting member
(21), (39), (49) Internal fitting member
(22) Fitting hole
(23) Annular recess
(24) Annular projection
(65) Cross-shaped groove
(68) Retaining structure

Claims (12)

A stopper body that is fitted in the opening and has an insertion hole for inserting the small-diameter tube portion of the syringe body in an airtight state , and the lower end opening of the insertion hole is formed to protrude downward; and the insertion hole A check valve stretched on the plug body so as to close the lower end opening of the plug with a predetermined pressure ,
At the end of the insertion operation of the small-diameter tube portion of the syringe main body into the insertion hole, the check valve is pushed open at the tip of the small-diameter tube portion of the syringe main body so that the inside of the opening communicates with the small-diameter pipe portion of the syringe main body. A plug body with a check valve, wherein a liquid flow path is formed. The plug body includes an outer fitting member that fits into the opening and an inner fitting member that fits into the outer fitting member, and the outer fitting member has a fitting hole portion into which the inner fitting member is fitted. The inner fitting member has an insertion hole portion into which the small diameter tube portion of the syringe body is inserted, and the distal end portion of the inner fitting member is inserted into the outer fitting member from the fitting hole portion of the outer fitting member. The stopper with a check valve according to claim 1 , which protrudes downward . The check valve includes a sheet-like membrane portion made of an elastic material and a pedestal portion formed on an upper surface portion of the sheet-like membrane portion, and the sheet-like membrane portion is a small diameter of the syringe body of the stopper body. The lower end opening portion of the insertion hole portion of the tube portion is stretched so as to be closed with a predetermined pressure , and a liquid passing window portion is formed outside the closing portion of the lower end opening portion of the insertion hole portion. The plug body with a check valve according to claim 1 or 2 , wherein the stopper body is formed so as not to block the small-diameter tube portion of the syringe body. A stopper body that is fitted in the opening and has an insertion hole for inserting the small-diameter tube portion of the syringe body in an airtight state , and the lower end opening of the insertion hole is formed to protrude downward; and the insertion hole A check valve stretched on the plug body so as to close the lower end opening at a predetermined pressure, and the plug body is fitted to the outer fitting member fitted into the opening, the outer fitting member, And an inner fitting member having an insertion hole portion into which the small diameter tube portion of the syringe main body is inserted in the center portion, and the check valve is a lower end opening portion of the insertion hole portion of the small diameter tube portion of the syringe main body of the inner fitting member A plate-like membrane portion that opens and closes, a pedestal portion formed on the upper surface portion of the plate-like membrane portion so that the small-diameter tube portion of the syringe body is not blocked, and a plurality of elastic materials The string-like hanging part is connected to the outer edge part of the plate-like film part, and the upper end part is the inner surface of the outer fitting member. Check according to claim 1, characterized in that suspended a plate-like membrane portion so as to close the lower end opening of the insertion hole of the small diameter tube portion of the syringe body and connected to the end portion at a predetermined pressure Plug with valve. A stopper body that is fitted in the opening and has an insertion hole for inserting the small-diameter tube portion of the syringe body in an airtight state, and the lower end opening of the insertion hole is formed to protrude downward; and the insertion hole A check valve stretched on the plug body so as to close the lower end opening at a predetermined pressure, and the plug body is fitted to the outer fitting member fitted into the opening, the outer fitting member, And an inner fitting member having an insertion hole portion into which the small diameter tube portion of the syringe main body is inserted in the center portion, and the check valve is a lower end opening portion of the insertion hole portion of the small diameter tube portion of the syringe main body of the inner fitting member A plate-like membrane part that opens and closes and a plurality of string-like hanging parts made of an elastic material, the string-like hanging part connects the base to the outer edge part of the plate-like film part, and the upper end part A plate-like film part is hung so as to close the lower end opening part of the insertion hole part of the small diameter pipe part of the syringe body with a predetermined pressure by connecting to the upper end part of the inner surface of the outer fitting member. Lowering, of the lower hanging plurality of string-like, the elastic force of the lower hanging at least one cord-like and greater than the lower hanging other string-shaped, plate-shaped membrane lower end of the lower hanging string-shaped as a hinge The plug body with a check valve according to claim 1, wherein the part is opened by turning. A stopper body that is fitted in the opening and has an insertion hole for inserting the small-diameter tube portion of the syringe body in an airtight state , and the lower end opening of the insertion hole is formed to protrude downward; and the insertion hole A check valve stretched on the plug body so as to close the lower end opening at a predetermined pressure, and the plug body is fitted to the outer fitting member fitted into the opening, the outer fitting member, And an inner fitting member having an insertion hole portion into which the small diameter tube portion of the syringe main body is inserted in the central portion, and the check valve includes a cup-shaped membrane portion made of an elastic material and a bottom portion of the cup-shaped membrane portion. A pedestal portion formed on the upper surface, and the cup-shaped film portion is connected to the entire inner peripheral edge of the outer fitting member with the upper entire peripheral edge thereof being fitted on the inner fitting member. in an inner bottom surface of the film portion, the lower end opening of the insertion hole of the small diameter tube portion of the syringe body of the inner fitting member so as to close at a predetermined pressure And, the small diameter tube portion of the syringe body to form a pedestal portion so as not to occlude, in claim 1, characterized by forming a plurality of liquid passing windows the entire peripheral surface of the cup-shaped membrane portion The plug with check valve as described . 7. The stopper with a check valve according to claim 6 , wherein a width between the liquid passing window portions of the cup-shaped film portion is narrowed to form a string-like portion between the adjacent liquid passing window portions. body. The plug body from a thick ring-shaped external fitting member to be fitted in the opening, and fitted member lower in a state fitted to the external fitting member is projecting downward from the thick ring-shaped external fitting member A cup-shaped film portion made of an elastic material that fits the protruding portion of the inner fitting member protruding from the thick ring-shaped outer fitting member is integrally formed with the thick ring-shaped outer fitting member. The lower end opening of the insertion hole portion of the small-diameter tube portion of the syringe body of the inner fitting member is closed with a predetermined pressure on the inner surface of the bottom portion of the membrane portion, and the small-diameter tube portion of the syringe body is closed with a pedestal portion formed on the upper surface of the bottom portion. The plug body with a check valve according to claim 6 , wherein a plurality of liquid passing windows are formed on the peripheral surface of the cup-shaped membrane part. 7. The plug body with a check valve according to claim 6 , wherein both side surfaces of the cup-shaped film part are cut to form a band-shaped film part, and an opening formed by the cut is formed as a liquid window part. . A stopper body that is fitted in the opening and has an insertion hole for inserting the small-diameter tube portion of the syringe body in an airtight state, and the lower end opening of the insertion hole is formed to protrude downward; and the insertion hole A check valve stretched on the plug body so as to close the lower end opening at a predetermined pressure, and the plug body is fitted to the outer fitting member fitted into the opening, the outer fitting member, And an inner fitting member having an insertion hole portion into which the small diameter tube portion of the syringe main body is inserted in the central portion, and the check valve includes a cup-shaped membrane portion made of an elastic material and a bottom portion of the cup-shaped membrane portion. A pedestal portion formed on the upper surface, and the cup-shaped film portion is connected to the entire inner peripheral edge of the outer fitting member with the upper entire peripheral edge thereof being fitted on the inner fitting member . A plurality of fluid passage holes are formed in an annular portion that is in contact with the annular tip surface of the inner fitting member at the bottom of the membrane portion, and the fluid passage holes are formed. Closing a plurality of liquid passing holes formed in said cup-shaped membrane portion in the annular front end face of the pressure to the inner fitting member an annular portion of the cup-shaped membrane portion at a predetermined pressure to the annular front end face of the fitted member The plug with check valve according to claim 1, wherein the small-diameter tube portion of the syringe body is not blocked by a pedestal portion provided on the bottom surface of the cup-shaped membrane portion. Any of claims 6-10, characterized in that is constituted by a base portion formed in the bottom portion upper surface of the cup-shaped membrane portion and the disk body formed of a plastic material, a pedestal formed integrally on the disc-body A plug body with a check valve according to claim 1. 12. A lid body made of an elastic material fitted into an upper end opening of an insertion hole portion of a plug body, and a cross-shaped breaking groove is provided on one surface of the lid body . A plug with a check valve according to any one of the above.

Images