JP2004298618A

JP2004298618A - Medical valve

Info

Publication number: JP2004298618A
Application number: JP2004047190A
Authority: JP
Inventors: Norihiro Hiejima; 徳寛比恵島; Masaru Suzuki; 賢鈴木; Kazuyoshi Harada; 和良原田; Takuya Masuda; 拓也桝田
Original assignee: Nipro Corp
Current assignee: Nipro Corp
Priority date: 2003-03-17
Filing date: 2004-02-24
Publication date: 2004-10-28
Anticipated expiration: 2024-02-24
Also published as: JP4649844B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical valve capable of supplying liquids and the like by connecting with a male luer without a metal needle. <P>SOLUTION: The medical valve has a housing 1 with the upper end capable of opening which is hollow for inserting with a chip 38 of the male luer 37 freely, and a liquid transporting path 28 which is arranged and formed in the housing 1 to the upper and lower directions and opened to the diameter outside direction. And the medical valve has a spike body 2 for connecting a liquid circuit 26 to the lower part of the liquid transporting path 28, an opening and closing part 29 as an elastic deformable tube which is engaged outside to the spike body 2 and seals the spike body 2 and closed at the upper side capable of opening and closing freely, and is elastically deformed and contracted by pressing to the lower side by the chip 38 of the male luer 37, and an elastic seal 3, which is engaged outside to the spike body 2 by directly contacting the opening and closing part 29 to the spike body 2 and elastic deformation to the diameter outside direction and opening, for communicating the inside of the male luer 37 and the liquid transporting path 28 of the spike body 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は医療用弁に関し、液体回路、例えば、輸液バッグ、輸液ライン（ルート）の中途部、体外液体回路に備えられて、微量元素、ビタミン、抗生物質等の薬液の補液、混注、追加投与等を行うための混注プラグ等において、操作者の誤穿刺等の問題から、金属針を用いずに、雄ルアーの接続により補液等を行えるものに関する。 TECHNICAL FIELD The present invention relates to a medical valve, which is provided in a liquid circuit, for example, an infusion bag, a middle part of an infusion line (route), an extracorporeal liquid circuit, and replaces, co-injects, and additionally administers a chemical solution such as trace elements, vitamins, and antibiotics. The present invention relates to a co-injection plug or the like for performing fluid replacement or the like by connecting a male luer without using a metal needle due to a problem such as erroneous puncture of an operator.

金属針を用いずに、輸液ルートにシリンジや他の液体回路等の雄ルアーを接続する医療用弁として、ハウジングに内蔵されたスパイク体が、弾性シールにより被覆されたものがある（例えば、特許文献１参照。）。 As a medical valve for connecting a male luer such as a syringe or another liquid circuit to an infusion route without using a metal needle, there is a medical valve in which a spike body built in a housing is covered with an elastic seal (for example, see Patents). Reference 1).

このものでは、雄ルアーのチップの押圧により、弾性シールが下方に圧縮され、スパイク体が弾性シールに挿通されて、上方に露出し、雄ルアーのチップ内に進入する。これにより、雄ルアー内部とスパイク体内部の液体移送路が、スパイク体側面の開口を介して、連通し、液体が移送可能となる。又、雄ルアーのチップによる弾性シールの押圧を解除すると、圧縮状態の弾性シールが、その弾発力により、伸長して、元の大きさに戻り、スパイク体は弾性シール内にシールされる。 In this device, when the tip of the male luer is pressed, the elastic seal is compressed downward, and the spike body is inserted through the elastic seal, exposed upward, and enters the male luer tip. Thus, the liquid transfer paths inside the male luer and the spike body communicate with each other via the opening on the side surface of the spike body, and the liquid can be transferred. When the pressing of the elastic seal by the tip of the male luer is released, the elastic seal in a compressed state expands and returns to its original size due to its elastic force, and the spike body is sealed in the elastic seal.

ところで、コスト面を考慮すると、スパイク体は、通常、樹脂製とされる。ところが、上記従来においては、スパイク体内部に液体移送路が形成されて、液体移送路が、スパイク体の外周壁部により完全に被覆されているため、スパイク体の外径を小さくすると、スパイク体の外周壁部を極めて薄くする必要があり、この場合には、スパイク体を樹脂で成形することは極めて困難である。 By the way, in consideration of cost, the spike body is usually made of resin. However, in the related art, the liquid transfer path is formed inside the spike body, and the liquid transfer path is completely covered by the outer peripheral wall of the spike body. Needs to be extremely thin, and in this case, it is extremely difficult to mold the spike body with resin.

このため、スパイク体が進入する雄ルアーのチップの内径は、大である方（例えば、内径が１．５ｍｍ以上）が好ましい。然しながら、雄ルアーがガラス製シリンジで、そのチップがガラス製の場合には、成形上の問題から、チップの内径を大にすることが困難であり、この場合には、チップ内にスパイク体を進入させることができず、雄ルアーと医療用弁を接続できないとの問題があった。 Therefore, it is preferable that the inner diameter of the tip of the male lure into which the spike body enters is larger (for example, the inner diameter is 1.5 mm or more). However, when the male luer is a glass syringe and the tip is made of glass, it is difficult to increase the inner diameter of the tip due to molding problems.In this case, a spike is inserted inside the tip. There was a problem that the male lure could not be entered and the medical valve could not be connected.

特表平７―５０５０６４号公報Japanese Patent Publication No. 7-505064

解決しようとする問題点は、雄ルアーのチップの内径が小である場合には、雄ルアーを医療用弁に容易に接続できなかった点である。 The problem to be solved is that when the tip of the male luer has a small inner diameter, the male luer could not be easily connected to the medical valve.

本発明は、上記問題点を解決した医療用弁を提供することを目的とし、その目的を達成するために、本発明の特徴とするところは、雄ルアーが分離可能に接続される医療用弁であって、Ａ．上端が開口する中空とされて、雄ルアーのチップが挿脱自在に挿入されるハウジングと、Ｂ．ハウジング内に上下方向に配設されて、少なくとも上端部を除く部分が、上端に向かうに従って外径が漸次連続的に小となる略テーパー状に形成され、径方向外方に開口する液体移送路が上下方向に形成されて、液体移送路の下部が液体回路と接続されるスパイク体と、Ｃ．弾性変形可能なチューブ状とされ、スパイク体に外嵌されて、スパイク体をシールすると共に、上端部が、スパイク体の上方で、開閉可能に閉鎖される開閉部とされ、雄ルアーのチップによる下方への押圧により、弾性変形して、下方に縮小すると共に、開閉部がスパイク体と当接して、径方向外方に弾性変形し、開放されて、スパイク体に外嵌され、雄ルアー内部とスパイク体の液体移送路が連通する弾性シールを有する点にある。
尚、スパイク体が、軸心部から径方向外方に突出する３枚以上のフィンを有し、隣接するフィン間が液体移送路とされることもある。 An object of the present invention is to provide a medical valve which solves the above problems, and in order to achieve the object, a feature of the present invention is that a medical valve to which a male luer is separably connected. A. B. a housing having a hollow upper end and into which a male luer tip is removably inserted; A liquid transfer path that is disposed in the housing in the vertical direction and has at least a portion excluding an upper end portion formed in a substantially tapered shape whose outer diameter gradually and continuously decreases toward the upper end, and opens radially outward. Are formed in a vertical direction, and a lower portion of the liquid transfer path is connected to the liquid circuit; An elastically deformable tube, which is fitted over the spike body and seals the spike body, and the upper end is an opening / closing part which can be opened / closed above the spike body, and is provided with a male luer tip. Due to the downward pressing, it is elastically deformed and contracts downward, and the opening / closing portion comes into contact with the spike body, elastically deforms radially outward, is opened, is fitted to the spike body, and is fitted inside the male luer. And a liquid transfer path for the spike body.
The spike body may have three or more fins projecting radially outward from the shaft center, and a liquid transfer path may be provided between adjacent fins.

又、雄ルアーが分離可能に接続される医療用弁であって、Ａ．上端が開口する中空とされて、雄ルアーのチップが挿脱自在に挿入されるハウジングと、Ｂ．ハウジング内に上下方向に配設されて、少なくとも上端部を除く部分が、上方に向かって略テーパー状に形成され、外周面に、径方向外方に開口する溝状の液体移送路が上下方向に形成されて、液体移送路の下部が液体回路と接続される中実のスパイク体と、Ｃ．弾性変形可能なチューブ状とされ、スパイク体に外嵌されて、スパイク体をシールすると共に、上端部が、スパイク体の上方で、開閉可能に閉鎖される開閉部とされ、雄ルアーのチップによる下方への押圧により、弾性変形して、下方に縮小すると共に、開閉部がスパイク体と当接して、径方向外方に弾性変形し、開放されて、スパイク体に外嵌され、雄ルアー内部とスパイク体の液体移送路が連通する弾性シールを有することもある。
更に、上記スパイク体に代えて、下記のスパイク体を採用することもある。
即ち、スパイク体が、Ａ．その上端部を構成する結合部と、Ｂ．結合部と一体形成され、結合部から下方に分岐されて、スパイク体の残部を構成する複数の分岐部から成り、分岐部間が液体移送路とされることもある。
又、スパイク体が、スパイク体の上下方向全長にわたる複数の分割体から成り、分割体間が液体移送路とされることもある。
更に、スパイク体が、Ａ．スパイク体の上下方向全長にわたる複数の主体部と、Ｂ．これら主体部と一体形成されて、主体部間に配設され、これら主体部を結合するブリッジ部を有し、主体部間が液体移送路とされることもある。 A medical valve to which a male luer is detachably connected, comprising: B. a housing having a hollow upper end and into which a male luer tip is removably inserted; A groove-like liquid transfer path is disposed in the housing in a vertical direction, at least a portion excluding an upper end portion is formed in a substantially tapered shape upward, and a groove-shaped liquid transfer path that opens radially outward is formed on an outer peripheral surface. B. a solid spike body formed at the lower end of the liquid transfer path and connected to the liquid circuit; An elastically deformable tube, which is fitted over the spike body and seals the spike body, and the upper end is an opening / closing part which can be opened / closed above the spike body, and is provided with a male luer tip. Due to the downward pressing, it is elastically deformed and contracts downward, and the opening / closing portion comes into contact with the spike body, elastically deforms radially outward, is opened, is fitted to the spike body, and is fitted inside the male luer. The spikes may have an elastic seal communicating with the liquid transfer path.
Further, the following spike body may be employed instead of the above spike body.
That is, the spike body is A.I. B. a coupling part forming the upper end thereof; It may be composed of a plurality of branch portions that are formed integrally with the connection portion and are branched downward from the connection portion to form the remaining portion of the spike body, and a liquid transfer path may be provided between the branch portions.
Further, the spike body may be composed of a plurality of divided bodies extending over the entire length of the spike body in the vertical direction, and the space between the divided bodies may be a liquid transfer path.
Further, the spike body is A.I. A plurality of main portions extending over the entire vertical length of the spike body; The main body may be formed integrally with the main body, disposed between the main bodies, and provided with a bridge for connecting the main bodies, and the liquid transfer path may be provided between the main bodies.

又、雄ルアーが分離可能に接続される医療用弁であって、Ａ．上端が開口する中空とされて、雄ルアーのチップが挿脱自在に挿入されるハウジングと、Ｂ．ハウジング内に上下方向に配設されて、上端部が略円柱状とされると共に、上端面が上方に向かって凸状の略半球面とされ、上端部を除く部分が、上端に向かうに従って外径が漸次連続的に小となる略テーパー状に形成され、径方向外方に開口する液体移送路が上下方向に形成されて、液体移送路の下部が液体回路と接続されるスパイク体と、Ｃ．弾性変形可能なチューブ状とされ、スパイク体に外嵌されて、スパイク体をシールすると共に、上端部が、スパイク体の上方で、開閉可能に閉鎖される開閉部とされ、雄ルアーのチップによる下方への押圧により、弾性変形して、下方に縮小すると共に、開閉部がスパイク体と当接して、径方向外方に弾性変形し、開放されて、スパイク体に外嵌され、雄ルアー内部とスパイク体の液体移送路が連通する弾性シールを有することもある。
更に、スパイク体が、軸心部から径方向外方に突出する３枚以上のフィンを有し、隣接するフィン間が液体移送路とされることもある。
又、フィンが周方向等間隔に配設され、各フィンの外縁が弾性シール内面に当接することもある。
更に、弾性シールにおける、フィンとの当接部の横断面が略多角形とされることもある。
又、スパイク体の下部がハウジングに挿入、固定されることもある。
更に、開閉部の下面の中心部側が略平面とされて、スパイク体の上端と間隙を介して対向することもある。
又、弾性シールの上部の内周面に、径方向内方に突出し且つスパイク体の上端部と当接するリング状突起が略全周にわたって形成されることもある。
更に、弾性シールにおける、開閉部と下端部を除く部分が、蛇腹状の伸縮部とされることもある。
又、ハウジングの上端面と弾性シールの上端面が略面一とされることもある。 A medical valve to which a male luer is detachably connected, comprising: B. a housing having a hollow upper end and into which a male luer tip is removably inserted; It is disposed in the up-down direction in the housing, the upper end is substantially cylindrical, and the upper end surface is a substantially hemispherical surface protruding upward. A spike body in which the diameter is formed in a substantially tapered shape that is gradually and continuously reduced, a liquid transfer path that opens radially outward is formed in the vertical direction, and the lower part of the liquid transfer path is connected to the liquid circuit, C. An elastically deformable tube, which is fitted over the spike body and seals the spike body, and the upper end is an opening / closing part which can be opened / closed above the spike body, and is provided with a male luer tip. Due to the downward pressing, it is elastically deformed and contracts downward, and the opening / closing portion comes into contact with the spike body, elastically deforms radially outward, is opened, is fitted to the spike body, and is fitted inside the male luer. The spikes may have an elastic seal communicating with the liquid transfer path.
Further, the spike body may have three or more fins protruding radially outward from the axial center, and a liquid transfer path may be provided between adjacent fins.
The fins may be arranged at equal intervals in the circumferential direction, and the outer edge of each fin may abut the inner surface of the elastic seal.
Further, the cross section of the contact portion with the fin in the elastic seal may be substantially polygonal.
Also, the lower part of the spike body may be inserted and fixed in the housing.
Further, the center of the lower surface of the opening / closing portion may be substantially flat, and may face the upper end of the spike body via a gap.
In addition, a ring-shaped projection that projects radially inward and abuts on the upper end of the spike body may be formed on substantially the entire inner peripheral surface of the upper portion of the elastic seal.
Further, a portion of the elastic seal other than the opening / closing portion and the lower end portion may be formed as a bellows-like elastic portion.
Also, the upper end surface of the housing and the upper end surface of the elastic seal may be substantially flush.

本発明によれば、雄ルアーのチップの内径が小の場合でも、スパイク体をチップ内に容易に進入させることができ、雄ルアーと医療用弁を容易に接続できる。又、スパイク体の少なくとも上端部を除く部分が、上端に向かうに従って外径が漸次連続的に小となる略テーパー状に形成されたテーパー部とされて、その外径が、下方に向かって、段階的ではなく、連続的に増加するので、弾性シールの伸縮時に、弾性シールがスパイク体の外周面に引っ掛かったりすることがなく、スムーズに伸縮する。
又、本発明の一実施態様では、スパイク体を中実とし、その外周面に、単に、溝を形成することで、液体移送路を構成したので、スパイク体の強度を大とでき、弾性シールの伸縮時等に、スパイク体が変形する惧れがない。
更に、本発明の一実施態様では、スパイク体が、スパイク体の上下方向全長にわたる複数の分割体から成り、スパイク体の構成が簡易であるため、製造を容易に行なえる。
又、本発明の一実施態様では、ブリッジ部を大とする程、スパイク体の強度を向上できると共に、デッドスペースを小とでき、又、ブリッジ部を小とする程、スパイク体をより小径とできる。即ち、ブリッジ部の大きさを変更することで、スパイク体、即ち、医療用弁の性能を容易に変更できる。
更に、本発明の一実施態様では、スパイク体の上端面が、上方に向かって凸状の半球面とされているので、スパイク体の上端面が開閉部と当接して、開閉部が開放される際に、開閉部がスムーズに開放されると共に、スパイク体の上端部が略円柱状とされているので、開閉部の開口部がスパイク体の上端部に沿ってスムーズに下降し、開閉部をスムーズに開閉できる。
又、本発明の一実施態様では、各フィンの外縁が弾性シールの内面に当接しているので、弾性シール内部の医療用弁容積（デッドスペース）を減少でき、雄ルアーのチップを医療用弁から分離させた際に発生する薬液の逆流（バックフロー）量を減少できる。
更に、本発明の一実施態様では、スパイク体の下部がハウジングに挿入、固定されているので、スパイク体をハウジングに容易且つ確実に固定できる。
又、本発明の一実施態様では、弾性シールの上部の内周面に、径方向内方に突出し且つスパイク体の上端部と当接する周突起が略全周にわたって形成されているので、弾性シールの開閉部の耐圧性（強度）を向上でき、開閉部の不慮の開放を防止できる。
更に、本発明の一実施態様では、弾性シールにおける、開閉部と下端部を除く部分が、蛇腹状の伸縮部とされているので、弾性シールがスムーズに伸縮する。 ADVANTAGE OF THE INVENTION According to this invention, even if the inside diameter of the chip | tip of a male luer is small, a spike body can easily enter into a chip | tip, and a male luer and a medical valve can be easily connected. Also, at least the portion excluding the upper end of the spike body is a tapered portion formed in a substantially tapered shape in which the outer diameter gradually and continuously decreases toward the upper end, and the outer diameter is downward, Since the elastic seal increases continuously, not stepwise, the elastic seal expands and contracts smoothly without being caught on the outer peripheral surface of the spike body when the elastic seal expands and contracts.
Further, in one embodiment of the present invention, the spike body is made solid, and the liquid transfer path is formed by simply forming a groove on the outer peripheral surface, so that the strength of the spike body can be increased, and the elastic seal can be increased. There is no fear that the spike body will be deformed when expanding or contracting.
Further, in one embodiment of the present invention, the spike body is composed of a plurality of divided bodies extending over the entire length of the spike body in the vertical direction, and the structure of the spike body is simple, so that the production can be easily performed.
Further, in one embodiment of the present invention, the larger the bridge portion, the higher the strength of the spike body, the smaller the dead space, and the smaller the bridge portion, the smaller the diameter of the spike body. it can. That is, by changing the size of the bridge portion, the performance of the spike body, that is, the performance of the medical valve can be easily changed.
Further, in one embodiment of the present invention, since the upper end surface of the spike body is a hemispherical surface that is convex upward, the upper end surface of the spike body comes into contact with the opening / closing portion, and the opening / closing portion is opened. When the opening / closing section is opened smoothly, and the upper end of the spike body is substantially cylindrical, the opening of the opening / closing section smoothly descends along the upper end of the spike body, Can be opened and closed smoothly.
Further, in one embodiment of the present invention, since the outer edge of each fin abuts against the inner surface of the elastic seal, the volume of the medical valve (dead space) inside the elastic seal can be reduced, and the tip of the male luer can be replaced with the medical valve. The amount of backflow of the chemical solution generated when separated from the liquid can be reduced.
Further, in one embodiment of the present invention, since the lower part of the spike body is inserted into and fixed to the housing, the spike body can be easily and reliably fixed to the housing.
Further, in one embodiment of the present invention, a circumferential projection projecting radially inward and contacting the upper end of the spike body is formed on substantially the entire inner peripheral surface of the upper portion of the elastic seal. The pressure resistance (strength) of the opening / closing section can be improved, and accidental opening of the opening / closing section can be prevented.
Further, in one embodiment of the present invention, since the portion of the elastic seal other than the opening / closing portion and the lower end portion is formed as a bellows-like elastic portion, the elastic seal expands and contracts smoothly.

本発明は、雄ルアーのチップの内径が小である場合にも、雄ルアーを容易に接続できる医療用弁を提供する。 The present invention provides a medical valve that can easily connect a male luer even when the inner diameter of the tip of the male luer is small.

以下、本発明を混注プラグに適用した実施例１を図１〜図５の図面に基づき説明すると、図１、図４及び図５は混注プラグを示し、混注プラグは、ハウジング１と、スパイク体（スリット棒）２と、弾性シール（部材）３等を有する。 Hereinafter, a first embodiment in which the present invention is applied to a co-injection plug will be described with reference to the drawings of FIGS. 1 to 5. FIGS. 1, 4 and 5 show a co-injection plug. (Slit rod) 2, an elastic seal (member) 3, and the like.

図２にも示すように、ハウジング１は、上下両端で開口する中空とされて、雄ルアーが挿脱自在に挿入されるもので、本体７と、接続体８を有する。本体７及び接続体８の構成材料としては、ポリカーボネート樹脂、アクリル樹脂、硬質塩化ビニル樹脂、高密度ポリエチレン樹脂、ポリプロピレン樹脂、アクリルニトリル・ブタジエン・スチレンブロック共重合体樹脂、ポリアミド樹脂、ポリエチレンテレフタレート樹脂、ポリブチレンテレフタレート樹脂、ポリアセタール樹脂、フッ素樹脂、ポリフェニレンサルファイド樹脂、ポリエーテルサルフォン樹脂、ポリエーテルエーテルケトン樹脂、液晶ポリマー樹脂等が挙げられる。又、上記樹脂にガラス繊維またはグラファイト、無機フィラー、カーボンナノチューブ等を配合して、強度を強化したものを用いても良い。更に、下記の上流側連結部１０の無菌性を向上するために、抗菌剤( 銀・亜鉛置換ゼオライト、銀担持リン酸カルシウム等) を本体７等の構成材料に練り込んでも良い。 As shown also in FIG. 2, the housing 1 is hollow at both upper and lower ends, into which a male luer is removably inserted, and has a main body 7 and a connecting body 8. The constituent materials of the main body 7 and the connection body 8 include polycarbonate resin, acrylic resin, hard vinyl chloride resin, high-density polyethylene resin, polypropylene resin, acrylonitrile-butadiene-styrene block copolymer resin, polyamide resin, polyethylene terephthalate resin, Examples include polybutylene terephthalate resin, polyacetal resin, fluorine resin, polyphenylene sulfide resin, polyether sulfone resin, polyether ether ketone resin, and liquid crystal polymer resin. Further, a resin whose strength is enhanced by blending glass fiber or graphite, an inorganic filler, a carbon nanotube, or the like with the above resin may be used. Further, an antibacterial agent (silver / zinc-substituted zeolite, silver-carrying calcium phosphate, etc.) may be kneaded into the constituent material of the main body 7 or the like in order to improve the sterility of the following upstream connecting portion 10.

本体７は、上下両端が開口する中空とされて、上部が、雄ルアーが分離可能に接続される上流側（雄）連結部（（雄）継手手段、（雄）継手部）１０とされ、外周面に雄螺子部１１が形成されている。本体７の内面には、上流側連結部１０の内面とされる小径孔１２と、小径孔１２よりも大径とされた大径孔１３と、大径孔１３よりも大径とされた係合孔１７と、係合孔１７と同径とされ且つ雌螺子が形成された雌螺子部１４が、上記の順で、下方に連設されている。大径孔１３と係合孔１７の境界部には、段付状に形成され且つ下方に面状を呈する当接面１６が形成されている。 The main body 7 is hollow at both upper and lower ends, and the upper part is an upstream (male) coupling portion ((male) coupling means, (male) coupling portion) 10 to which a male luer is separably connected. A male screw portion 11 is formed on the outer peripheral surface. On the inner surface of the main body 7, a small-diameter hole 12 serving as the inner surface of the upstream-side connecting portion 10, a large-diameter hole 13 having a larger diameter than the small-diameter hole 12, and a member having a larger diameter than the large-diameter hole 13. The mating hole 17 and the female screw portion 14 having the same diameter as the engaging hole 17 and having a female screw formed thereon are continuously provided downward in the above order. At the boundary between the large-diameter hole 13 and the engagement hole 17, a contact surface 16 that is formed in a stepped shape and has a planar shape downward is formed.

接続体８は、上下両端で開口する中空状とされて、本体７の下部内に挿入、固着されている。接続体８は、外周面に雄螺子が形成された嵌合部１９と、嵌合部１９よりも小径とされた下流側（雄）連結部（（雄）継手手段、（雄）継手部）２０を、上記の順で、下方に連設することで、一体形成されている。接続体８内部の中心部には、連通孔２２が上下方向に貫通形成されている。 The connecting body 8 has a hollow shape opened at both upper and lower ends, and is inserted and fixed in the lower part of the main body 7. The connecting body 8 includes a fitting portion 19 having a male screw formed on the outer peripheral surface, and a downstream (male) connecting portion having a smaller diameter than the fitting portion 19 ((male) coupling means, (male) coupling portion). 20 are integrally formed by connecting them downward in the above order. A communication hole 22 is formed in a central portion inside the connection body 8 so as to penetrate in a vertical direction.

嵌合部１９は、本体７の雌螺子部１４内に挿入、螺結されて、固定されている。下流側連結部２０は、本体７の雌螺子部１４の下部内から下方に突出すると共に、下方に向かって、テーパー状とされており、液体回路として例示される液体移送用チューブ２６が分離可能に接続されている。尚、液体回路は、輸液ラインや体外液体回路のチューブだけでなく、輸液バッグ等の各種液体バッグや各種機器も含む。尚、接続体８に嵌合部１９を設けず、接続体８を本体７に接着してもよい。 The fitting portion 19 is inserted and screwed into the female screw portion 14 of the main body 7 and fixed. The downstream connecting portion 20 projects downward from the lower portion of the female screw portion 14 of the main body 7 and is tapered downward, so that the liquid transfer tube 26 exemplified as a liquid circuit can be separated. It is connected to the. The liquid circuit includes not only a tube for an infusion line or an extracorporeal liquid circuit, but also various liquid bags such as an infusion bag and various devices. Note that the connection body 8 may be bonded to the main body 7 without providing the fitting portion 19 on the connection body 8.

スパイク体２は、本体７における、小径孔１２の下部、大径孔１３及び雌螺子部１４の上端部にわたる内部に、上下方向に配設されて、接続体８の嵌合部１９上に立設されて、接着剤により固定されている。図３にも示すように、スパイク体２の上端部は、略一定外径のストレート部２Ａとされ、残部が、上端に向かうに従って外径が漸次連続的に小となる（略）テーパー状に形成されたテーパー部２Ｂとされている。尚、スパイク体２の全体を、上端に向かうに従って外径が漸次連続的に小となる（略）テーパー状に形成することもある。ストレート部２Ａの最大外径については、例えば、雄ルアーとされるガラス製シリンジのチップ内径が１．０〜２．５ｍｍであるので、０．５〜２．０ｍｍ程度が好ましい。スパイク体２の構成材料としては、本体７と同様の樹脂の他、ステンレス等の金属材料が挙げられる。 The spike body 2 is vertically arranged inside the main body 7 below the small-diameter hole 12, the large-diameter hole 13, and the upper end of the female screw portion 14, and stands on the fitting portion 19 of the connecting body 8. And fixed by an adhesive. As shown in FIG. 3, the upper end of the spike body 2 is a straight portion 2 </ b> A having a substantially constant outer diameter, and the remaining portion has a (substantially) tapered shape in which the outer diameter gradually decreases continuously toward the upper end. The tapered portion 2B is formed. In some cases, the entire spike body 2 may be formed into a (substantially) tapered shape in which the outer diameter gradually decreases continuously toward the upper end. The maximum outer diameter of the straight portion 2A is preferably about 0.5 to 2.0 mm because, for example, the tip inner diameter of a glass syringe used as a male luer is 1.0 to 2.5 mm. As a constituent material of the spike body 2, a metal material such as stainless steel in addition to the same resin as the main body 7 is used.

スパイク体２は、軸心部から径方向外方に突出する３枚以上（本例では、４枚）のフィン２７を有する。フィン２７は、周方向等間隔に配設されると共に、スパイク体２の上下方向全長にわたっており、隣接するフィン２７間が、上下方向の液体移送路２８とされている。液体移送路２８は、スパイク体２の上下方向全長にわたって形成されて、径方向外方に開口すると共に、上下両端で開口している。液体移送路２８の下端開口は、接続体の連通孔２２と連通している。尚、フィン２７を、スパイク体２における、ストレート部２Ａを除く上下方向全長にわたって設けてもよい。 The spike body 2 has three or more (four in this example) fins 27 protruding radially outward from the shaft center. The fins 27 are arranged at equal intervals in the circumferential direction, and extend over the entire length of the spike body 2 in the vertical direction. A space between the adjacent fins 27 is a liquid transfer path 28 in the vertical direction. The liquid transfer path 28 is formed over the entire length of the spike body 2 in the vertical direction, opens radially outward, and opens at both upper and lower ends. The lower end opening of the liquid transfer passage 28 communicates with the communication hole 22 of the connector. Note that the fins 27 may be provided over the entire length of the spike body 2 in the vertical direction excluding the straight portion 2A.

弾性シール３は、弾性変形可能なチューブ状（略円筒状）とされて、スパイク体２に上方から外嵌されて、スパイク体２をシールするもので、開閉部２９と、伸縮部３０と、フランジ部３１を、上記の順で、下方に連設することで、一体形成されている。弾性シール３は、雄ルアーのチップによる下方への押圧により、弾性変形して、下方に縮小すると共に、開閉部２９がスパイク体２と当接して、径方向外方に弾性変形し、開放されて、スパイク体２に外嵌され、雄ルアーのチップとスパイク体２の液体移送路２８が連通する。弾性シール３の構成材料としては、天然ゴム、合成ポリイソプレンゴム、ブチルゴム、クロロプレンゴム、シリコーンゴム、ウレタンゴム、スチレンーブタジエンゴム、エチレンプロピレンゴム、アクリルゴム、フッ素ゴム、熱可塑性エラストマー等が挙げられる。 The elastic seal 3 has a tubular shape (substantially cylindrical shape) that can be elastically deformed, is externally fitted to the spike body 2 from above, and seals the spike body 2. The flange portions 31 are integrally formed by connecting the flange portions 31 downward in the above order. The elastic seal 3 is elastically deformed and reduced downward by the downward pressing of the male luer tip, and the opening / closing portion 29 comes into contact with the spike body 2 and elastically deforms radially outward and is opened. As a result, the tip of the male luer is externally fitted to the spike body 2 and the liquid transfer path 28 of the spike body 2 communicates. Examples of the constituent material of the elastic seal 3 include natural rubber, synthetic polyisoprene rubber, butyl rubber, chloroprene rubber, silicone rubber, urethane rubber, styrene butadiene rubber, ethylene propylene rubber, acrylic rubber, fluoro rubber, thermoplastic elastomer, and the like. .

開閉部２９は、弾性シール３の上端部を構成するもので、略円盤状とされ、本体７の小径孔１２の上部内に配設されて、スパイク体２の上方に位置しており、その上端面が本体７の上端面と（略）面一とされている。開閉部２９の下面の中心部側は、上方に半球状に凹設された凹設面３２とされ、凹設面３２が、スパイク体２の上端と、間隙を介して、対向している。尚、凹設面３２をスパイク体２の上端と当接させてもよい。又、凹設面３２を、スパイク体２のストレート部２Ａの外周面と当接させてもよい。開閉部２９の外径は、本体の小径孔１１の内径と（略）同一、又は、上記内径よりも若干小とされている。又、開閉部２９の外周部を除く部分には、単一（又は、直交する２本の）径方向のスリット３３が、上下方向に貫通形成されており、開閉部２９の径方向外方への弾性変形により、スリット３３が開放可能とされている。 The opening / closing portion 29 constitutes the upper end portion of the elastic seal 3, has a substantially disk shape, is disposed above the small diameter hole 12 of the main body 7, and is located above the spike body 2. The upper end surface is (substantially) flush with the upper end surface of the main body 7. The central portion of the lower surface of the opening / closing portion 29 is a concave surface 32 that is concavely formed in a hemispherical shape, and the concave surface 32 faces the upper end of the spike body 2 via a gap. Note that the concave surface 32 may be brought into contact with the upper end of the spike body 2. Further, the concave surface 32 may be brought into contact with the outer peripheral surface of the straight portion 2A of the spike body 2. The outer diameter of the opening / closing portion 29 is (substantially) equal to or slightly smaller than the inner diameter of the small-diameter hole 11 of the main body. In addition, a single (or two orthogonal) radial slits 33 are formed vertically through the portion of the opening / closing portion 29 except for the outer peripheral portion, and are formed radially outward of the opening / closing portion 29. The slit 33 can be opened by the elastic deformation of.

伸縮部３０は、弾性シール３の大部分を構成するもので、蛇腹状とされて、開閉部２９下面から下設され、スパイク体２を内有している。尚、雄ルアーのチップによる弾性シール３の下方への押圧時に、弾性シール３は下方へ縮小するが、この縮小の大部分（又は、全部）が、伸縮部３０で行なわれる。 The expansion / contraction part 30 constitutes most of the elastic seal 3, has a bellows shape, is provided below the lower surface of the opening / closing part 29, and has the spike body 2 inside. When the tip of the male luer presses the elastic seal 3 downward, the elastic seal 3 contracts downward, but most (or all) of the contraction is performed by the elastic portion 30.

フランジ部３１は、弾性シール３の下端部を構成するもので、リング状とされ、伸縮部３０の下端部から径方向外方に突設されている。フランジ部３１は、本体７の係合孔１７に嵌合され、本体７の当接面１６と接続体８の嵌合部１９とにより、挟持固定されている。 The flange portion 31 constitutes a lower end portion of the elastic seal 3, has a ring shape, and protrudes radially outward from a lower end portion of the elastic portion 30. The flange portion 31 is fitted in the engagement hole 17 of the main body 7, and is clamped and fixed by the contact surface 16 of the main body 7 and the fitting portion 19 of the connecting body 8.

上記構成例では、混注プラグを介して、輸液、採血等を行なう場合には、混注プラグの上端面を消毒した後、例えば、図４及び図５に示すように、雄ルアーとして例示されるシリンジ３７のチップ３８を、ハウジング１の本体７の小径孔１２内に上端開口から挿入する。 In the above configuration example, when performing infusion, blood collection, or the like via the co-injection plug, after disinfecting the upper end surface of the co-infusion plug, for example, a syringe illustrated as a male luer as shown in FIGS. The chip 38 of 37 is inserted from the upper end opening into the small diameter hole 12 of the main body 7 of the housing 1.

この際、図５の仮想線で示すように、シリンジ３７として、内面に雌螺子部が形成されたロック部材４０付きのものを使用し、このロック部材４０の雌螺子部を本体７の雄螺子部１１に螺結すれば、シリンジ３７の上記挿入状態を確実に維持できる。 At this time, as shown by a virtual line in FIG. 5, a syringe 37 having a lock member 40 having a female screw portion formed on the inner surface is used, and the female screw portion of the lock member 40 is connected to the male screw of the main body 7. By screwing the syringe 37 to the portion 11, the above-described inserted state of the syringe 37 can be reliably maintained.

シリンジ３７のチップ３８の上記挿入により、弾性シール３が押圧され、弾性シール３の伸縮部３０等が、その弾発力に抗して、縮小する。この際、スパイク体２の少なくとも上端部を除く部分が、上端に向かうに従って外径が漸次連続的に小となる（略）テーパー状に形成されたテーパー部２Ｂとされて、その外径が、下方に向かって、段階的ではなく、連続的に増加するので、弾性シール３の縮小時に、弾性シール３の伸縮部３０等がスパイク体２の外周面に引っ掛かったりすることがなく、スムーズに縮小する。又、弾性シール３における、開閉部２９とフランジ部３１を除く部分が、蛇腹状の伸縮部３０とされているので、この点からも、弾性シール３はスムーズに縮小する。 Due to the insertion of the tip 38 of the syringe 37, the elastic seal 3 is pressed, and the elastic portion 30 of the elastic seal 3 contracts against its elastic force. At this time, at least a portion excluding the upper end of the spike body 2 is a tapered portion 2B formed in a (substantially) tapered shape in which the outer diameter gradually decreases continuously toward the upper end. Since it increases continuously, not stepwise, downward, the elastic part 3 of the elastic seal 3 does not get caught on the outer peripheral surface of the spike body 2 when the elastic seal 3 contracts, so that the elastic seal 3 smoothly contracts. I do. In addition, since the portion of the elastic seal 3 other than the opening / closing portion 29 and the flange portion 31 is formed as a bellows-like elastic portion 30, the elastic seal 3 also contracts smoothly from this point.

上記縮小及び弾性シール３の開閉部２９のスリット３３とスパイク体２の上端との当接により、図５に示すように、開閉部２９が径方向外方に弾性変形して、開閉部２９のスリット３３が開放され、開閉部２９がスパイク体２のテーパー部２Ｂの上端部に外嵌されて、スパイク体のストレート部２Ａ及び液体移送路２８の上端部が露出する。これにより、シリンジ３７内部が、スパイク体の液体移送路２８、接続体８の連通孔２２を介して、チューブ２６と連通するので、輸液、採血等を従来同様に行なえる。 Due to the contraction and the contact between the slit 33 of the opening / closing section 29 of the elastic seal 3 and the upper end of the spike body 2, the opening / closing section 29 is elastically deformed radially outward as shown in FIG. The slit 33 is opened, and the opening / closing portion 29 is externally fitted to the upper end of the tapered portion 2B of the spike 2, and the straight portion 2A of the spike and the upper end of the liquid transfer path 28 are exposed. Thus, the inside of the syringe 37 communicates with the tube 26 via the spike liquid transfer path 28 and the communication hole 22 of the connector 8, so that infusion, blood collection, and the like can be performed as in the conventional case.

輸液、採血等が終了すれば、シリンジ３７のチップ３８をハウジング１の本体７内から抜去する。これによって、弾性シール３の伸縮部３０等の弾発力により、伸縮部３０等が上方に伸長して、元の大きさに戻る。この際、スパイク体２の少なくとも上端部を除く部分が、上端に向かうに従って外径が漸次連続的に小となる（略）テーパー状に形成されたテーパー部２Ｂとされているので、上記同様に、弾性シール３の伸縮部３０等がスパイク体２の外周面に引っ掛かったりすることがなく、スムーズに伸長する。又、弾性シール３における、開閉部２９とフランジ部３１を除く部分が、蛇腹状の伸縮部３０とされているので、この点からも、弾性シール３はスムーズに伸長する。更に、この伸長と同時に、開閉部２９も上昇して、元の位置に戻り、これにより、開閉部２９のスリット３３が閉鎖されて、弾性シール３により、スパイク体２がシールされる。 When the infusion, blood collection and the like are completed, the tip 38 of the syringe 37 is removed from the main body 7 of the housing 1. As a result, the elastic portion 30 or the like of the elastic seal 3 expands upward by the elastic force of the elastic portion 30 or the like, and returns to the original size. At this time, at least a portion excluding the upper end portion of the spike body 2 is a tapered portion 2B formed in a (substantially) tapered shape in which the outer diameter gradually decreases continuously toward the upper end. The elastic portion 30 of the elastic seal 3 smoothly extends without being caught on the outer peripheral surface of the spike body 2. In addition, since the portion of the elastic seal 3 other than the opening / closing portion 29 and the flange portion 31 is a bellows-like elastic portion 30, the elastic seal 3 also extends smoothly from this point. Further, at the same time as the extension, the opening / closing section 29 also rises and returns to the original position, whereby the slit 33 of the opening / closing section 29 is closed, and the spike body 2 is sealed by the elastic seal 3.

上記構成例によれば、スパイク体２に、径方向外方に開口する液体移送路２８を形成し、従来のように、液体移送路２８を、スパイク体２の外周壁部により完全に被覆しないようにして、スパイク体２の外径を小さくした場合でも、スパイク体２の外周壁部を極めて薄くする必要をなくしたので、外径の小さなスパイク体２でも、樹脂等により、容易に成形できる。 According to the above configuration example, the liquid transfer path 28 that opens radially outward is formed in the spike body 2, and the liquid transfer path 28 is not completely covered by the outer peripheral wall of the spike body 2 as in the related art. Thus, even when the outer diameter of the spike body 2 is reduced, it is not necessary to make the outer peripheral wall of the spike body 2 extremely thin, so that the spike body 2 having a small outer diameter can be easily formed of resin or the like. .

それ故、上記のように、雄ルアーがガラス製シリンジ３７で、そのチップ３８がガラス製とされ、その内径が小の場合でも、スパイク体２をチップ３８内に容易に進入させることができ、シリンジ３７と混注プラグを容易に接続できる。 Therefore, as described above, even when the male luer is a glass syringe 37 and its tip 38 is made of glass and its inner diameter is small, the spike body 2 can easily enter the tip 38, The syringe 37 and the co-injection plug can be easily connected.

図６は本発明の実施例２を示し、中実のスパイク体２の外周面に、断面Ｖ型状の溝とされた液体移送路２８が上下方向全長にわたって形成されている。尚、液体移送路２８を、スパイク体２における、ストレート部２Ａを除く上下方向全長にわたって形成してもよい。又、本例及び下記の第３〜５例では、上記第１例と同様に、テーパー部２Ｂの外径が、上端に向かうに従って漸次連続的に小となるようにされているが、その外径を、連続的ではなく、段階的に小となるようにしてもよい。又、スパイク体２の全体を、上記のようにしてもよい。 FIG. 6 shows a second embodiment of the present invention, in which a liquid transfer path 28 having a V-shaped cross section is formed on the outer peripheral surface of a solid spike body 2 over the entire length in the vertical direction. The liquid transfer path 28 may be formed over the entire length of the spike body 2 in the vertical direction excluding the straight portion 2A. In the present example and the following third to fifth examples, the outer diameter of the tapered portion 2B gradually decreases continuously toward the upper end as in the first example. The diameter may be made smaller gradually rather than continuously. Further, the entire spike body 2 may be configured as described above.

上記構成例では、スパイク体２を中実とし、その外周面に、単に、断面Ｖ型状の溝を形成することで、液体移送路２８を構成したので、スパイク体２の強度を大とでき、弾性シール３の伸縮時等に、スパイク体２が変形する惧れがない。 In the above configuration example, the spike body 2 is made solid and the liquid transfer path 28 is formed by simply forming a V-shaped groove in the outer peripheral surface thereof, so that the strength of the spike body 2 can be increased. When the elastic seal 3 expands and contracts, there is no fear that the spike body 2 is deformed.

図７は本発明の実施例３を示し、スパイク体２が、結合部４０と、複数（図例では、２本）の分岐部４１を有する。結合部４０は、スパイク体２の上端部を構成し、スパイク体２の残部が分岐部４１により構成されている。分岐部４１は結合部４０と一体形成されて、下方に分岐されている。分岐部４１間が液体移送路２８とされている。 FIG. 7 shows a third embodiment of the present invention, in which the spike body 2 has a connecting portion 40 and a plurality (two in the illustrated example) of branch portions 41. The coupling part 40 forms the upper end of the spike body 2, and the remainder of the spike body 2 is formed by the branch part 41. The branch part 41 is formed integrally with the coupling part 40 and is branched downward. The liquid transfer path 28 is formed between the branch portions 41.

図８は本発明の実施例４を示し、スパイク体２が、その上下方向全長にわたる複数の分割体４３から成る。本例では、分割体４３は、一対とされて、線対称とされ、分割体４３間が液体移送路２８とされている。 FIG. 8 shows a fourth embodiment of the present invention, in which the spike body 2 is composed of a plurality of divided bodies 43 over the entire length in the vertical direction. In this example, the divided bodies 43 are paired and symmetrical with each other, and the liquid transfer path 28 is provided between the divided bodies 43.

上記構成例では、スパイク体２の構成が簡易であるため、製造を容易に行なえる。 In the above configuration example, since the configuration of the spike body 2 is simple, manufacturing can be easily performed.

図９〜図１１は本発明の実施例５を示し、スパイク体２が、複数（図例では、２個）の主体部４５と、ブリッジ部４６を有する。主体部４５は、スパイク体の上下方向全長にわたるものとされ、一方、ブリッジ部４６は、これら主体部４５と一体形成されて、主体部４５間に配設され、これら主体部４５を結合する。主体部４５間が液体移送路２８とされている。 9 to 11 show a fifth embodiment of the present invention, in which the spike body 2 has a plurality of (two in the illustrated example) main bodies 45 and a bridge section 46. The main body 45 extends over the entire length of the spike body in the vertical direction. On the other hand, the bridge 46 is formed integrally with the main body 45 and disposed between the main bodies 45 to join the main bodies 45 together. The liquid transfer path 28 is formed between the main parts 45.

上記構成例では、ブリッジ部４６を大とする程、スパイク体２の強度を向上できると共に、デッドスペースを小とでき、又、ブリッジ部４６を小とする程、スパイク体２をより小径とできる。即ち、ブリッジ部４６がスパイク体２の外部に突出しない範囲で、ブリッジ部４６の長さ及び厚さを変更することで、スパイク体２、即ち、混注プラグの性能を容易に変更できる。 In the above configuration example, the larger the bridge portion 46, the higher the strength of the spike body 2 and the smaller the dead space, and the smaller the bridge portion 46, the smaller the diameter of the spike body 2. . That is, by changing the length and thickness of the bridge portion 46 within a range in which the bridge portion 46 does not protrude outside the spike body 2, the performance of the spike body 2, that is, the mixed injection plug, can be easily changed.

図１２〜図１７は本発明の実施例６を示し、図１２及び図１６に示すように、本体７がハウジング１の概ね上部側を構成すると共に、本体７の下面が当接面１６とされている。又、本体７の下部の外周部には、径方向外方に突出する複数個の嵌合突起４８が周方向等間隔に形成されている。本体７の内面における、上部の小径孔１２を除く部分は、上方に向かってテーパー状とされたテーパー孔４９とされている。 FIGS. 12 to 17 show a sixth embodiment of the present invention. As shown in FIGS. 12 and 16, the main body 7 constitutes a substantially upper side of the housing 1 and the lower surface of the main body 7 is a contact surface 16. ing. A plurality of fitting projections 48 projecting outward in the radial direction are formed at equal intervals in the circumferential direction on the outer peripheral portion of the lower portion of the main body 7. A portion of the inner surface of the main body 7 excluding the upper small-diameter hole 12 is formed as a tapered hole 49 tapered upward.

接続体８はハウジング１の概ね下部側を構成している。接続体８は、上下方向に配設された筒状の外筒部５１と、下流側連結部２０と、リング部５２とを一体形成することで、構成されている。下流側連結部２０は、上下方向に開口する筒状とされ、外筒部５１内に同心状として、上下方向に配設されると共に、下部側が外筒部５１から下方に突出しており、外筒部５１の上下方向中間部と、下流側連結部２０の上端部が、リング状とされたリング部５２により連結されている。 The connection body 8 constitutes a substantially lower side of the housing 1. The connecting body 8 is configured by integrally forming a cylindrical outer tube portion 51, a downstream connecting portion 20, and a ring portion 52, which are arranged in the vertical direction. The downstream-side connecting portion 20 is formed in a tubular shape that opens in the up-down direction, is arranged concentrically in the outer tube portion 51, is disposed in the up-down direction, and has a lower portion protruding downward from the outer tube portion 51. An intermediate portion in the vertical direction of the cylindrical portion 51 and an upper end portion of the downstream side connecting portion 20 are connected by a ring portion 52 having a ring shape.

外筒部５１における、リング部５２よりも上部には、径方向に貫通形成された複数個の嵌合孔５４が周方向等間隔に形成され、この嵌合孔５４に、本体７の嵌合突起４８が弾性変形を介して係脱自在に係合されることで、本体７と接続体８が一体化されている。外筒部５１の内面における、リング部５２と隣接する部分は、スパイク体２のフランジ部３１が嵌合される係合孔１７とされている。外筒部５１における、リング部５２よりも下部側の内周面は、雌螺子が形成された雌螺子部１４とされている。 A plurality of fitting holes 54 penetratingly formed in the radial direction are formed at equal intervals in the circumferential direction above the ring portion 52 in the outer cylindrical portion 51, and the main body 7 is fitted into the fitting holes 54. The main body 7 and the connecting body 8 are integrated with each other by the projection 48 being removably engaged via elastic deformation. A portion of the inner surface of the outer cylinder portion 51 adjacent to the ring portion 52 is an engagement hole 17 into which the flange portion 31 of the spike body 2 is fitted. The inner peripheral surface of the outer cylinder portion 51 below the ring portion 52 is a female screw portion 14 in which a female screw is formed.

下流側連結部の内部は連通孔２２とされている。又、下流側連結部２０及びリング部５２の上面は当接面４７とされ、この当接面４７と本体７の当接面１６が、スパイク体２のフランジ部３１に当接し、このフランジ部３１を挟持している。更に、当接面４７には、上方に突出するリング状突起５６が一体形成されており、このリング状突起５６がスパイク体２のフランジ部３１に食い込むことで、フランジ部３１がハウジング１により強固に固定される。 The inside of the downstream side connection portion is a communication hole 22. The upper surfaces of the downstream connecting portion 20 and the ring portion 52 are abutting surfaces 47, and the abutting surfaces 47 and the abutting surfaces 16 of the main body 7 abut on the flange portions 31 of the spike body 2. 31. Further, the contact surface 47 is integrally formed with a ring-shaped protrusion 56 projecting upward. The ring-shaped protrusion 56 bites into the flange portion 31 of the spike body 2, so that the flange portion 31 is more firmly attached to the housing 1. Fixed to.

スパイク体２は、図１３〜図１５にも示すように、ストレート部２Ａと、テーパー部２Ｂと、挿入部２Ｃを、上記の順で、下方に向かって、連設することで、構成されている。 As shown in FIGS. 13 to 15, the spike body 2 is configured by sequentially connecting the straight portion 2A, the tapered portion 2B, and the insertion portion 2C downward in the above order. I have.

ストレート部２Ａは、スパイク体２の上端部を構成するもので、中実の略円柱状とされて、略一定外径とされる共に、その上端面が、上方に向かって凸状の半球面５８とされている。このように、ストレート部２Ａの上端面が、上方に向かって凸状の半球面５８とされているので、スパイク体２が弾性シール３の開閉部２９と当接して、開閉部２９が開放される際に、開閉部２９がスムーズに開放されると共に、スパイク体の上端部であるストレート部２Ａが略円柱状とされているので、開閉部２９の開口部がスパイク体２のストレート部２Ａに沿ってスムーズに下降し、開閉部２９をスムーズに開閉できる。 The straight portion 2A constitutes the upper end portion of the spike body 2 and has a substantially cylindrical shape, a substantially constant outer diameter, and a semispherical surface whose upper end surface is convex upward. 58. As described above, since the upper end surface of the straight portion 2A is a hemispheric surface 58 that is convex upward, the spike body 2 comes into contact with the opening / closing portion 29 of the elastic seal 3 and the opening / closing portion 29 is opened. When opening, the opening / closing portion 29 is smoothly opened, and the straight portion 2A, which is the upper end portion of the spike body, has a substantially cylindrical shape. The opening / closing section 29 can be smoothly opened and closed.

テーパー部２Ｂは、スパイク体２の上下端部を除く部分を構成するもので、上端に向かうに従って外径が漸次連続的に小となる（略）テーパー状に形成されている。 The tapered portion 2B constitutes a portion excluding the upper and lower ends of the spike body 2, and is formed in a (substantially) tapered shape in which the outer diameter gradually and continuously decreases toward the upper end.

挿入部２Ｃは、スパイク体２の下端部を構成するもので、テーパー部２Ｂの下端の外径よりも小径とされると共に、一定外径とされ、接続体８の連通孔２２に挿入されて、連通孔２２内面に接着剤又は嵌合により固定されている。このように、スパイク体の下部の挿入部２Ｃを接続体８の連通孔２２に挿入、固定するようにしたので、スパイク体２をハウジング１に容易且つ確実に固定できる。 The insertion portion 2C constitutes the lower end portion of the spike body 2 and has a smaller diameter than the outer diameter of the lower end of the tapered portion 2B, has a constant outer diameter, and is inserted into the communication hole 22 of the connector 8. Is fixed to the inner surface of the communication hole 22 by an adhesive or fitting. As described above, since the lower insertion portion 2C of the spike body is inserted into and fixed to the communication hole 22 of the connecting body 8, the spike body 2 can be easily and reliably fixed to the housing 1.

テーパー部２Ｂ及び挿入部２Ｃは、軸心部から径方向外方に突出する３枚以上（本例では、４枚）のフィン２７により構成されている。フィン２７は、周方向等間隔に配設されると共に、隣接するフィン２７間が、上下方向の液体移送路２８とされている。液体移送路２８は、径方向外方に開口すると共に、上下両端で開口し、その下端開口は、接続体の連通孔２２と連通している。 The tapered portion 2B and the insertion portion 2C are formed by three or more (four in this example) fins 27 projecting radially outward from the shaft center. The fins 27 are arranged at equal intervals in the circumferential direction, and a space between the adjacent fins 27 is a liquid transfer path 28 in the vertical direction. The liquid transfer passage 28 opens radially outward and at both upper and lower ends, and its lower end opening communicates with the communication hole 22 of the connector.

弾性シール３は、実施例１の弾性シールを変形したもので、開閉部２９と、伸縮部３０と、フランジ部３１を、上記の順で、下方に連設することで、一体形成されている。 The elastic seal 3 is a modification of the elastic seal of the first embodiment. The elastic seal 3 is integrally formed by connecting the opening / closing section 29, the expansion / contraction section 30, and the flange section 31 downward in this order. .

伸縮部３０は、実施例１のように、蛇腹状とはされていない。伸縮部３０はスパイク体２にスムーズに外嵌できるように、その内面は、平滑面とすることが好ましい。伸縮部３０の上部の内外径は略一定径とされて、この上部の内面３Ａには、図１３に示すように、リング状突起６０が上下方向に１つ又は複数形成されている。リング状突起６０は伸縮部の内面から径方向内方に突出する共に、伸縮部の内面３Ａに（略）全周にわたって形成されている。これらリング状突起６０の少なくとも１個はスパイク体２のストレート部２Ａと当接し、これにより、弾性シール３の開閉部２９の耐圧性（強度）を向上でき、開閉部２９の不慮の開放を防止できる。 The elastic portion 30 is not formed in a bellows shape as in the first embodiment. The inner surface of the elastic portion 30 is preferably a smooth surface so that it can be smoothly fitted to the spike body 2. The inner and outer diameters of the upper portion of the elastic portion 30 are substantially constant, and one or more ring-shaped protrusions 60 are formed on the inner surface 3A of the upper portion in the vertical direction as shown in FIG. The ring-shaped projection 60 protrudes radially inward from the inner surface of the expandable portion, and is formed (almost) entirely on the inner surface 3A of the expandable portion. At least one of the ring-shaped projections 60 comes into contact with the straight portion 2A of the spike body 2, thereby improving the pressure resistance (strength) of the opening / closing portion 29 of the elastic seal 3 and preventing the opening / closing portion 29 from being accidentally opened. it can.

伸縮部３０の上部を除く部分は、上端に向かうに従って内外径が漸次連続的に小となる（略）テーパー状に形成され、特に、その下部側の縦断面の外側輪郭線は波形とされて、伸縮部３０が容易に伸縮するようにされている。 The portion excluding the upper portion of the expansion and contraction portion 30 is formed in a (substantially) tapered shape in which the inner and outer diameters gradually become smaller gradually toward the upper end, and in particular, the outer contour of the lower section of the lower portion has a waveform. The elastic part 30 is designed to easily expand and contract.

ところで、スパイク体２のテーパー部２Ｂの各フィン２７の最外側に位置する外縁を、弾性シール３の内面３Ａに当接させれば、弾性シール３内部の混注プラグの容積（医療用弁容積、デッドスペース）を減少でき、雄ルアーとして例示されるシリンジ３７のチップ３８を混注プラグから分離させた際に発生する薬液の逆流（バックフロー）量を減少できて、好ましい。そこで、本例では、例えば、弾性シール３の内径を、フィン２７の最小外径よりも小とし、スパイク体２に弾性シール３を弾性変形させながら外嵌することで、スパイク体２のテーパー部２Ｂのフィン２７の外面を、弾性シール３の内面３Ａに当接させている。この際、弾性シール３における、フィン２７との当接部の断面は、略多角形となる。例えば、図１４に示すように、スパイク体２のフィン２７の枚数が４枚であれば、弾性シール３における、フィン２７との当接部の断面が略４角形となり、又、図１７に示すように、スパイク体２のフィン２７の枚数が３枚であれば、弾性シール３における、フィン２７との当接部の断面が略３角形となる。尚、スパイク体２の各部の外径とは下記により定義される。即ち、各フィン２７の各部の最外側の外縁の一部を通過する最も小さい円を想定し、その円の直径を、スパイク体２の各部の外径としている。尚、弾性シール３における、フィン２７との当接部を、予め、フィン２７の枚数と対応する略多角形としておいてもよい。 By the way, if the outer edge of each tapered portion 2B of the spike body 2 located on the outermost side of each fin 27 is brought into contact with the inner surface 3A of the elastic seal 3, the volume of the co-injection plug inside the elastic seal 3 (medical valve volume, This is preferable because the dead space can be reduced and the amount of backflow of the chemical solution generated when the tip 38 of the syringe 37 exemplified as a male luer is separated from the co-injection plug can be reduced. Therefore, in this example, for example, the inner diameter of the elastic seal 3 is made smaller than the minimum outer diameter of the fins 27, and the elastic seal 3 is externally fitted to the spike body 2 while elastically deforming the same. The outer surface of the fin 27 of 2B is in contact with the inner surface 3A of the elastic seal 3. At this time, the cross section of the elastic seal 3 at the contact portion with the fin 27 is substantially polygonal. For example, as shown in FIG. 14, when the number of the fins 27 of the spike body 2 is four, the cross section of the elastic seal 3 at the contact portion with the fins 27 becomes substantially rectangular, and as shown in FIG. As described above, when the number of the fins 27 of the spike body 2 is three, the cross section of the elastic seal 3 at the contact portion with the fins 27 is substantially triangular. The outer diameter of each part of the spike body 2 is defined as follows. That is, the smallest circle passing through a part of the outermost outer edge of each part of each fin 27 is assumed, and the diameter of the circle is set as the outer diameter of each part of the spike body 2. In addition, the contact portion of the elastic seal 3 with the fins 27 may be formed in a substantially polygonal shape corresponding to the number of the fins 27 in advance.

尚、実施例１のハウジングと、実施例６のスパイク体及び弾性シールを組み合わせてもよく、又、実施例１のスパイク体及び弾性シールを、実施例６のハウジングと組み合わせてもよい。 The housing of the first embodiment may be combined with the spike body and the elastic seal of the sixth embodiment, or the spike body and the elastic seal of the first embodiment may be combined with the housing of the sixth embodiment.

又、実施例では、シリンジをハウジングから抜去した際に、弾性シールの弾発力により、弾性シールが伸長するようにしたが、この伸長を補助するために金属バネ、樹脂バネ等を組み合わせて、使用しても良い。又、実施の形態は、本発明を混注プラグに適用したものであるが、本発明は、その他の各種医療用弁に適用可能である。 In the embodiment, when the syringe is removed from the housing, the elastic seal is extended by the elastic force of the elastic seal.However, in order to assist this extension, a metal spring, a resin spring, or the like is used in combination. May be used. In the embodiment, the present invention is applied to a co-injection plug, but the present invention is applicable to various other medical valves.

本発明の実施例１を示す断面図である。1 is a cross-sectional view illustrating a first embodiment of the present invention. 図１のＡ−Ａ線矢視断面図である。FIG. 2 is a sectional view taken along line AA of FIG. 1. 図１のスパイク体の斜視図である。It is a perspective view of the spike body of FIG. 図１の作動状態図である。FIG. 2 is an operation state diagram of FIG. 1. 図４の作動状態図である。FIG. 5 is an operation state diagram of FIG. 4. 本発明の実施例２を示す斜視図である。It is a perspective view showing Example 2 of the present invention. 本発明の実施例３を示す斜視図である。It is a perspective view showing Example 3 of the present invention. 本発明の実施例４を示す斜視図である。It is a perspective view showing Example 4 of the present invention. 本発明の実施例５を示す斜視図である。It is a perspective view showing Example 5 of the present invention. 図９のＢ−Ｂ線矢視断面図である。FIG. 10 is a sectional view taken along line BB of FIG. 9. 図１０のＣ−Ｃ線矢視断面図である。FIG. 11 is a sectional view taken along line CC of FIG. 10. 本発明の実施例６を示す断面図である。FIG. 13 is a cross-sectional view illustrating a sixth embodiment of the present invention. 図１２の一部拡大図である。FIG. 13 is a partially enlarged view of FIG. 12. 図１２のＤ−Ｄ線矢視断面図である。FIG. 13 is a sectional view taken along line DD of FIG. 12. 図１２のスパイク体の斜視図である。It is a perspective view of the spike body of FIG. 図１２の作動状態図である。FIG. 13 is an operation state diagram of FIG. 12. 図１４の変形例である。It is a modification of FIG.

Explanation of reference numerals

１ハウジング
２スパイク体
２Ａストレート部
２Ｂテーパー部
２Ｃ挿入部
３弾性シール
３Ａ内面
２６液体移送用チューブ
２７フィン
２８液体移送路
２９開閉部
３０伸縮部
３３スリット
３７シリンジ（雄ルアー）
３８チップ
４０結合部
４１分岐部
４３分割体
４５主体部
４６ブリッジ部
５８半球面
６０リング状突起 DESCRIPTION OF SYMBOLS 1 Housing 2 Spike body 2A Straight part 2B Taper part 2C Insertion part 3 Elastic seal 3A Inner surface 26 Liquid transfer tube 27 Fin 28 Liquid transfer path 29 Opening / closing part 30 Expansion / contraction part 33 Slit 37 Syringe (male lure)
Reference Signs 38 Chip 40 Joining part 41 Branch part 43 Divided body 45 Main part 46 Bridge part 58 Hemisphere 60 Ring-shaped projection

Claims

A medical valve to which a male luer is separably connected,
A. A housing having a hollow upper end, into which a male luer tip is removably inserted; and
B. A liquid that is disposed in the housing in the up-down direction and has at least a portion excluding the upper end portion formed in a substantially tapered shape in which the outer diameter gradually decreases continuously toward the upper end, and opens radially outward. A spike body in which a transfer path is formed in a vertical direction, and a lower part of the liquid transfer path is connected to the liquid circuit;
C. It is an elastically deformable tube and is fitted over the spike body to seal the spike body, and the upper end is an opening / closing part that can be opened and closed above the spike body. When pressed downward, it is elastically deformed and contracts downward, and the opening / closing portion comes into contact with the spike body, elastically deforms radially outward, is opened, is fitted to the spike body, and is fitted inside the male luer. A medical valve having an elastic seal in which a fluid transfer passage of the spike and the spike body communicates.

A medical valve to which a male luer is separably connected,
A. A housing having a hollow upper end, into which a male luer tip is removably inserted; and
B. A groove-like liquid transfer path is disposed in the housing in the vertical direction, and at least a portion excluding the upper end portion is formed in a substantially tapered shape toward the upper side. A solid spike body formed at the bottom of the liquid transfer path and connected to the liquid circuit;
C. It is an elastically deformable tube and is fitted over the spike body to seal the spike body, and the upper end is an opening / closing part that can be opened and closed above the spike body. When pressed downward, it is elastically deformed and contracts downward, and the opening / closing portion comes into contact with the spike body, elastically deforms radially outward, is opened, is fitted to the spike body, and is fitted inside the male luer. A medical valve having an elastic seal in which a fluid transfer passage of the spike and the spike body communicates.

A medical valve to which a male luer is separably connected,
A. A housing having a hollow upper end, into which a male luer tip is removably inserted; and
B. A liquid transfer path is disposed vertically in the housing, and at least a portion excluding an upper end portion is formed in a substantially tapered shape upward, and a liquid transfer path that opens radially outward is formed in a vertical direction to transfer liquid. A spike body whose lower part of the road is connected to the liquid circuit,
C. It is an elastically deformable tube and is fitted over the spike body to seal the spike body, and the upper end is an opening / closing part that can be opened and closed above the spike body. When pressed downward, it is elastically deformed and contracts downward, and the opening / closing portion comes into contact with the spike body, elastically deforms radially outward, is opened, is fitted to the spike body, and is fitted inside the male luer. And an elastic seal with which the liquid transfer path of the spike body communicates,
The spike body
(a) a connecting portion constituting the upper end portion,
(b) a plurality of branches that are formed integrally with the coupling portion and are branched downward from the coupling portion to form the remaining portion of the spike body;
A medical valve with a liquid transfer path between the branches.

A medical valve to which a male luer is separably connected,
A. A housing having a hollow upper end, into which a male luer tip is removably inserted; and
B. A liquid transfer path is disposed vertically in the housing, and at least a portion excluding an upper end portion is formed in a substantially tapered shape upward, and a liquid transfer path that opens radially outward is formed in a vertical direction to transfer liquid. A spike body whose lower part of the road is connected to the liquid circuit,
C. It is an elastically deformable tube and is fitted over the spike body to seal the spike body, and the upper end is an opening / closing part that can be opened and closed above the spike body. When pressed downward, it is elastically deformed and contracts downward, and the opening / closing portion comes into contact with the spike body, elastically deforms radially outward, is opened, is fitted to the spike body, and is fitted inside the male luer. And an elastic seal with which the liquid transfer path of the spike body communicates,
The spike body is composed of a plurality of divided bodies extending over the entire vertical length of the spike body,
A medical valve with a liquid transfer path between the divided bodies.

A medical valve to which a male luer is separably connected,
A. A housing having a hollow upper end, into which a male luer tip is removably inserted; and
B. A liquid transfer path is disposed vertically in the housing, and at least a portion excluding an upper end portion is formed in a substantially tapered shape upward, and a liquid transfer path that opens radially outward is formed in a vertical direction to transfer liquid. A spike body whose lower part of the road is connected to the liquid circuit,
C. It is an elastically deformable tube and is fitted over the spike body to seal the spike body, and the upper end is an opening / closing part that can be opened and closed above the spike body. When pressed downward, it is elastically deformed and contracts downward, and the opening / closing portion comes into contact with the spike body, elastically deforms radially outward, is opened, is fitted to the spike body, and is fitted inside the male luer. And an elastic seal with which the liquid transfer path of the spike body communicates,
The spike body
(a) a plurality of main portions extending over the entire vertical length of the spike body;
(b) having a bridge portion integrally formed with these main portions, disposed between the main portions, and connecting these main portions,
A medical valve with a liquid transfer path between the main parts.

A medical valve to which a male luer is separably connected,
A. A housing having a hollow upper end, into which a male luer tip is removably inserted; and
B. It is disposed vertically in the housing, the upper end portion is substantially cylindrical, the upper end surface is a substantially hemispherical surface that is convex upward, and the portion excluding the upper end portion follows the upper end. A spike body that is formed in a substantially tapered shape in which the outer diameter gradually decreases continuously, and a liquid transfer path that opens radially outward is formed in the vertical direction, and the lower part of the liquid transfer path is connected to the liquid circuit. When,
C. It is an elastically deformable tube and is fitted over the spike body to seal the spike body, and the upper end is an opening / closing part that can be opened and closed above the spike body. When pressed downward, it is elastically deformed and contracts downward, and the opening / closing portion comes into contact with the spike body, elastically deforms radially outward, is opened, is fitted to the spike body, and is fitted inside the male luer. A medical valve having an elastic seal in which a fluid transfer passage of the spike and the spike body communicates.

7. The medical valve according to claim 1, wherein the spike body has three or more fins projecting radially outward from the axial center, and a liquid transfer path is provided between adjacent fins.

The medical valve according to claim 7, wherein the fins are arranged at regular intervals in a circumferential direction, and an outer edge of each fin abuts on an inner surface of the elastic seal.

9. The medical valve according to claim 8, wherein a cross section of a contact portion of the elastic seal with the fin is substantially polygonal.

The medical valve according to any one of claims 1 to 9, wherein a lower portion of the spike body is inserted and fixed in the housing.

The medical valve according to any one of claims 1 to 10, wherein a central portion of a lower surface of the opening / closing portion is substantially flat, and faces the upper end of the spike body via a gap.

The medical valve according to any one of claims 1 to 11, wherein a ring-shaped projection that projects radially inward and abuts on an upper end portion of the spike body is formed on substantially the entire inner peripheral surface of the upper portion of the elastic seal. .

The medical valve according to any one of claims 1 to 12, wherein a portion of the elastic seal other than the opening / closing portion and the lower end portion is a bellows-like elastic portion.

14. The medical valve according to claim 1, wherein an upper end surface of the housing and an upper end surface of the elastic seal are substantially flush with each other.