JP3761748B2

JP3761748B2 - Needleless mixed injection tube

Info

Publication number: JP3761748B2
Application number: JP17807499A
Authority: JP
Inventors: 和雄江良; 良隆安田; 昭子北林; 幸弘野村; 敬二藤田; 典男山崎
Original assignee: ハナコメディカル株式会社
Priority date: 1998-11-25
Filing date: 1999-06-24
Publication date: 2006-03-29
Anticipated expiration: 2019-06-24
Also published as: JP2000217929A

Description

【０００１】
【発明の属する技術分野】
本発明は、ニードルレス混注管に関するもので、更に詳しくは側管に接続する操作者が誤って手に針を刺すことがなく、またシリンジ等の抜去時に薬液や血液等の飛び跳ねを防止し、困難なく容易に接続操作が可能なニードルレス混注管に関する。
【０００２】
【従来の技術】
従来、患者に薬液や栄養液等を与える際、静脈に挿入されたカテーテルにチューブを接続し、このチューブへ薬液や栄養液等を供給するが、複数の薬液を患者に供給する場合もしばしばあり、そのような場合には、分岐管を有す混注管が使用される。従来この混注管は分岐管の開口部にゴム部材を密栓し、このゴム部材に穿刺針を突き刺してシリンジ等と接続し、薬液等を注入する。また三方活栓を輸液本管と側管との合流部に形成して薬液等の注入を行うものも知られている。またゴム栓キャップに、一文字、×字形等の切り込みを有する構造からなり、この切り込みに細い円管状のものを押し込む、いわゆる無針の専用オス管を刺し込み、液を流通させる製品が販売されている。
【０００３】
更に特開平８−２０６２３０号に開示されている如く、適宜形状のゴム部材で密栓した輸液用ニードルレス混注管が知られ、このゴム部材には、十文字形等の密着孔が設けられており、この密着孔にニードル乃至シリンジを挿入することにより連通することが示されている。また別の例では、特開平１０−１９２４１５号公報には、分岐管を有する混注管において、分岐管に、閉塞部を有するゴム状弾性体を有し、このゴム状弾性体は分岐管内で支持部材で支持される如くされたものが記載されている。
【０００４】
【発明が解決しようとする課題】
しかしながら、前述の如く混注管の分岐管の開口部にゴム部材を密栓したものにあっては、ゴム部材に穿刺針を突き刺すのにかなり強い力が必要で、その結果操作者が誤って穿刺針を手に刺してしまう恐れがあり問題であった。また三方活栓を使用する場合には、三方活栓を閉栓している管路は外気に曝されているので、雑菌による汚染が起こりやすいという問題があった。またゴム栓キャップに、一文字、×字形等の切り込みを有する構造のものは、使用に際し、専用のオス管が必要となるばかりでなく、オス管の外径に限度が生じ、特に現在市販されているシリンジのテーパー部を有する太径のものは挿入が困難であり、仮に挿入できるとしても切り込み部分に亀裂が生じる等の問題がある。
【０００５】
更に最近公開された特開平８−２０６２３０号に記載の混注管のゴム部材の場合には、側注管またはシリンジを無菌状態で接続、分離等の操作を行うことができ、穿刺針のように誤って手に刺すようなことがない点で優れた効果を奏するものではあるが、シリンジ等の刺し込みが今一つ容易でないという問題が考えられる。更に刺し込んだシリンジ等を抜去する際、薬液や血液等が飛び跳ねるという問題があり、また特開平１０−１９２４１５号公報に記載の閉塞部を有するゴム状弾性体を有し、このゴム状弾性体は分岐管内で支持部材で支持される如くされたものでは、その構造が複雑で経済的でないという問題が考えられる。
【０００６】
そこで、本発明等は、これらの問題点につき種々検討した結果、シリンジ等の刺し込みが容易であり、かつ簡単な構造からなり経済的であるゴム部材の構造を案出することができたもので、この知見に基づいて本発明のニードルレス混注管が完成した。また上部凹部の構造において、その一部を階段状テーパーとすること及び上方凹部と下方凹部との間の閉塞部が上方に位置することにより、簡単な構造であるにもかかわらず刺し込んだシリンジ等を抜去する際、薬液や血液等の飛び跳ねを防止することができることを見出した。したがって、本発明が解決しようとする第１の課題は、シリンジ等の刺し込みが容易であり、かつ成形が簡単かつ容易であり経済的であるゴム部材を有するニードルレス混注管を提供するものである。また本発明が解決しようとする第２の課題は、シリンジ等の刺し込みが容易であり、かつ成形が簡単かつ容易であり経済的であるばかりでなく刺し込んだシリンジ等を抜去する際、薬液や血液等の飛び跳ねを防止することができるゴム部材を有するニードルレス混注管を提供するものである。
【０００７】
【課題を解決するための手段】
本発明の上記課題は、以下の各請求項に記載された発明によってそれぞれ達成される。
【０００８】
［請求項１］本管と側管とがＴ字形を有する混注管からなり、この側管に蓋を有し、この側管内には、弾性部材が充填されているニードルレス混注管において、該弾性部材は、本管と側管との流通を遮断しており、該弾性部材の中央部には閉塞孔を有し、またこの弾性部材の上部には同心円状に円筒部分と円錐部分からなる凹部を有すると共に、該円筒部分の内壁は、その一部若しくは全部が蓋の舌片で覆われていることを特徴とするニードルレス混注管。
［請求項２］弾性部材が上方凹部と下方凹部を有する断面Ｈ形状からなる円筒形状であり、上方凹部と下方凹部との間の閉塞部が上方に位置すると共に、上方凹部の下部凹部が上部凹部より狭くなる階段状テーパーを有し、該上部凹部の壁がすり鉢状に傾斜しており、更に該傾斜部分の一部若しくは全部が蓋の挿入孔の壁で覆われていることを特徴とする請求項１に記載のニードルレス混注管。
［請求項３］弾性部材の上面に設けられた凹部の円筒部分の側壁は、下方にテーパーを有することを特徴とする請求項１又は請求項２に記載のニードルレス混注管。
［請求項４］弾性部材に設けられている閉塞孔が、Ｖ字形、十字形、Ｙ字形又は一文字形のいずれかであることを特徴とする請求項１乃至請求項３のいずれかに記載のニードルレス混注管。
［請求項５］弾性部材の側面に凹部を有するか又は該側面に凹部を有しかつ上面と下面の周囲に環状凸部を有することを特徴とする請求項１乃至請求項４のいずれかに記載のニードルレス混注管。
［請求項６］弾性部材が蓋の内径よりも小さい径を有し、かつ該弾性部材の側面に蓋の内径よりわずかに大きい径を有する環状凸部を有し、および上面と下面の周囲に環状凸部を有することを特徴とする請求項１乃至請求項４のいずれかに記載のニードルレス混注管。
【０００９】
請求項１に記載されるように、本発明のニードルレス混注管は、弾性部材が、本管と側管との流通を遮断しており、該弾性部材の中央部には閉塞孔を有し、またこの弾性部材の上部には同心円状に円筒部分と円錐部分からなる凹部を有すると共に、該円筒部分の内壁は、その一部若しくは全部が蓋の舌片で覆われていることを特徴とするもので、この凹部を有することによりシリンジ等を差し込む際、位置合わせが容易であると共に、凹部の円筒部分の内壁は、その一部若しくは全部が蓋の舌片で覆われていることによりシリンジ等を挿入する際、舌片がゴム部材の円錐部分と協同して凹部を押し広げ、シリンジ等が閉塞孔に挿入されるのを容易にするという優れた効果を奏するものである。
【００１０】
請求項２に記載されるように、弾性部材が上方凹部と下方凹部を有する断面Ｈ形状からなる円筒形状であり、上方凹部と下方凹部との間の閉塞部が上方に位置すると共に、上方凹部の下部凹部が上部凹部より狭くなる階段状テーパーを有し、該上部凹部の壁がすり鉢状に傾斜しており、更に該傾斜部分の一部若しくは全部が蓋の挿入孔の壁で覆われていることにより、シリンジ等の刺し込みが容易であり、かつ成形が簡単かつ容易であり経済的であるばかりでなく刺し込んだシリンジ等を抜去する際、薬液や血液等の飛び跳ねを防止することができる。
【００１１】
また請求項３に記載されるように、弾性部材の上面に設けられた凹部の円筒部分の側壁は、下方にテーパーを有することにより、シリンジ等の挿入がいっそう容易である。
【００１２】
また請求項４に記載されるように、弾性部材に設けられている閉塞孔が、Ｖ字形、十字形、Ｙ字形又は一文字形のいずれかであることにより密閉が十分できると共にシリンジ等の挿入時には、凹部と協同して容易に挿入することができる。
【００１３】
また請求項５に記載されるように、弾性部材の側面に凹部を有するか又は該側面に凹部を有しかつ上面と下面の周囲に環状凸部を有することにより、蓋の側壁と弾性部材の凹部面および凸部面との間に気密孔又は空間が形成される。これにより通常は、気密孔又は空間で構成された気密室は、シリンジ等の挿入による非圧縮性の弾性部材が変形した時の回避スペースを与えるので、シリンジ等の挿入の際、その気密孔が弾性部材により圧縮され、弾性部材の逃げ道として作用する。また気密室に封入される気体（空気）はその圧縮性のため挿入されたシリンジの保持力を本来弾性部材が保有する反撥弾性以上に増加させ、シリンジ等を交換する際などには密閉孔を閉鎖する力を高める作用を有するものである。したがって、シリンジ等の密閉孔の開口が極めて容易にでき、必要以上の力を入れて挿入する必要はないという優れた効果を奏するものである。
【００１４】
請求項６に記載されるように、弾性部材が蓋の内径よりも小さい径を有し、かつ該弾性部材の側面に蓋の内径よりわずかに大きい径を有する環状凸部を有し、および上面と下面の周囲に環状凸部を有することにより、気密孔又は空間が形成され、この気密孔又は空間で構成された気密室により請求項５に記載したと同様の優れた作用効果を奏することができる。
【００１５】
【発明の実施の形態】
以下に、本発明の実施の形態を図面を参照して説明するが、本発明は、これに限定されるものではない。
【００１６】
図１は、本発明のニードルレス混注管を示す斜視図である。図２は、図１の平面図である。図３は、図１のニードルレス混注管および内蔵されたゴム部材を示す断面図である。図４は、本発明のニードルレス混注管に内蔵される別のゴム部材の断面図である。図５は、図４に示されるゴム部材の別の形態を示す断面図である。図６は、本発明に用いる凸部を有する弾性部材の形状を示す断面図である。図７は、本発明に用いる凸部を有する弾性部材の形状の別の実施形態を示す断面図である。図８は、本発明に用いる凸部を有する弾性部材の形状の更に別の実施形態を示す断面図である。図９は、本発明に用いる弾性部材の側壁に環状凹部を有する形状の実施形態を示す断面図である。図１０は、本発明に用いる側壁に環状凸部を有する弾性部材を混注管に充填したところを示す断面図である。図１１は、弾性部材を示す断面図並びに斜視図である。図１２は、図１１の弾性部材を混注管に充填したところを示す斜視図である。
【００１７】
図１及び図２において、ニードルレス混注管１は、本管２と側管４とでＴ字形に構成されている。しかしＴ字形にこだわる必要もなくＹ字形やト字形でもよいことは明らかであるから、Ｔ字形とは、これらも含む意味で用いている。本管２は、開口端３ａ及び３ｂを有しており、これらには通常チューブが接続される。また側管４には、ゴム部材１０（図３参照）が内蔵されて閉塞されており、更に蓋５が装着されている。蓋５は上面に窪み８を有し、その中央部には同心円状に挿入孔５１を有し、かつ該挿入孔５１にはゴム部材１０を覆うように下方に延びた舌片６ａ，６ｂ，６ｃ，６ｄを有する。この舌片６ａ，６ｂ，６ｃ，６ｄは、先端に向かってテーパーを有しており、したがってこれらの間は溝９が構成される。この舌片６ａ，６ｂ，６ｃ，６ｄは、シリンジ等の挿入時にゴム部材１０の凹部１１の円錐部分７を押し広げる前段階として凹部１１の円筒部分１２（図３参照）を押し広げる作用を有するもので、これによりシリンジ等が円錐部分及び閉塞孔１０ａを容易にかつ完全に挿入される。
【００１８】
図３及び図４において、ニードルレス混注管１の側管４には、ゴム部材１０が内蔵されており、更に蓋５により密閉されている。蓋５から延びる舌片６ａ，６ｂ，６ｃ，６ｄの断面の形状は、下方に向かって厚みが厚くなっており、これによりゴム部材の凹部の円筒部分は、下方にテーパーが形成される。したがって、この舌片で覆われた凹部内面の径は、下方に向かって小さくなっているので、シリンジ等の挿入時、該凹部１１の円筒部分１２を容易に押し広げることができる。
【００１９】
一方、ゴム部材１０は、図４に示される如く、円柱部材からなり、この中央部には同心円状に閉塞孔１０ａを有すると共に、上面には中央部に同心円状に凹部が形成されている。この凹部１１は、円筒部分と円錐部分とからなり、シリンジ等が容易に挿入しうる形状となっている。またこの円筒部分の内壁は垂直に形成されてもよいが、内壁は下方にテーパーを有する方が、シリンジ等の挿入に際し、位置決めが簡単にできる点で好ましい（請求項２）。
【００２０】
更にこのゴム部材１０は、好ましくは側面ないし底面に凹部又は凸部を形成するのがよい。この凹部形状としては、図４に示されるような断面三角形状１３や図５に示される如き碗形状１４が好ましいが、これらに限定されるものではない（請求項４）。閉塞孔１０ａの長さは、ｈ₂＝ｈ₀−ｈ₁により決まるが、その目的用途により適宜決定し得るものである。
【００２１】
本発明において、更に弾性部材に凹部又は凸部を設けた構成の実施形態を挙げると、図６のａ，ｂに示されるように、それぞれ弾性部材１０の側壁１０ｂの周囲に断面半円形状の環状突起１５ａ、１５ｂが設けられている。この弾性部材１０を混注管の側管４に充填し蓋５を設けたところを図１０に示すが、この際、側管４と蓋５の内壁と弾性部材１０の側壁との間に気密室１９ａ，１９ｂが形成される。この気密室１９ａ，１９ｂは、断面半円形状の環状突起１５ａ、１５ｂの径が、側管の内壁の径よりもわずかに大きい径を有することにより気密が保たれる。また図７のａ，ｂにおいては、それぞれ弾性部材１０の側壁１０ｂの周囲に断面半円形状の環状突起１５ａ、１５ｂが設けられると共に、更にこの弾性部材１０の上面及び下面の周囲には、断面半円形状の環状突起１６ａ、１６ｂを有している。更に図８のａ，ｂにおいては、それぞれ弾性部材１０の側壁１０ｂの周囲に断面方形状の環状突起１７ａ、１７ｂが設けられると共に、更にこの弾性部材１０の上面及び下面の周囲には、断面半円形状の環状突起１６ａ、１６ｂを有している。
【００２２】
図６乃至図８に示される環状突起１５ａ、１５ｂ、１６ａ、１６ｂ、１７ａ、１７ｂの断面形状は、これらに限定されるものではなく、断面が半楕円形、三角形、半五角形、半六角形等の任意の形状でもよい。これらの環状突起１５ａ、１５ｂ、１６ａ、１６ｂ、１７ａ、１７ｂは、側管４に充填された時には、シールリップとして作用し、側管４に設けられた蓋５の側面との間に形成される気密孔が気密室となる。この気密室の作用は前述の通りである。
【００２３】
図９のａ，ｂにおいては、それぞれ弾性部材１０の側壁には、その周囲に沿って断面半円形状の環状凹部１８ａ，１８ｂが設けられている。また図９のｃ，ｄにおいては、それぞれ弾性部材１０の側壁には、その周囲に沿って断面半円形状の環状凹部１８ａ，１８ｂが設けられていると共に、更にこの弾性部材１０の上面及び下面の周囲には、断面半円形状の環状突起１６ａ、１６ｂを有している。本発明においては、この凹部１８ａ又は１８ｂは、蓋５の側壁との間に気密孔乃至気密室が形成されて、凸部による気密室と同様の優れた作用効果を奏するものである。またこの断面半円形状の環状凹部１８ａ，１８ｂに代えて、半楕円形、三角形、半五角形、半六角形等の任意の形状を用いてもよい。
【００２４】
図１１ａ，ｂにおいて、弾性部材１０は、断面Ｈ形状を有しており、閉塞孔１０ａを有する閉塞部１１ｅを堺に上方凹部１１と碗形状の下方凹部１４を有している。上方凹部１１は、上部の凹部１１ｃと下部の凹部１１ｄからなり、上方凹部１１の側壁は、階段状テーパー１１ａを有すると共に上部の凹部側壁１１ｂは、鉢状に傾斜しており、このような上方凹部１１が階段状テーパー１１ａを有することにより、シリンジ等の刺し込みが容易であり、かつ成形が簡単かつ容易であり経済的であるばかりでなく刺し込んだシリンジ等を抜去する際、薬液や血液等の飛び跳ねを防止することができる。
【００２５】
本発明では、弾性部材１０は、断面Ｈ形状を有しているが、上方凹部１１と下方凹部１４の間にある閉塞部１１ｅの厚みは、上方凹部１１と下方凹部１４との深さと密接な関係があるが、したがって、閉塞部１１ｅの厚みは、０．３〜３ｍｍの間で決定される。その厚みが０．３ｍｍより薄い場合には、薬液又は血液等の染み出しやすくなりエアーの吸い込みやすさが増してくるので好ましくない。また３ｍｍを越えた厚みでは、シリンジ等のテーパー先端部の挿入がしずらくなり、閉塞孔１０ａのスリットの形成において、スリットが入りずらくなってくる。したがって、閉塞部１１ｅの厚みの決定は、シリンジ、シャントジョイント等の挿入部材の種類、医療用具等の用途の種類によって０．３〜３ｍｍの間で適宜試験しながら、その厚みを決定することができる。
【００２６】
図１２は、図１１の弾性部材１０を混注管１に充填したもので、この際、用いられる蓋５は、挿入孔５１の側壁５２が弾性部材１０の一部を覆うような構造となっている。これにより弾性部材１０を確実に混注管１に固定することができると共に、シリンジ等のテーパー先端部の挿入ガイドの役目を有している。
【００２７】
本発明に用いられるゴム部材１０に設けられる閉塞孔１０ａは、Ｖ字形、十字形、Ｙ字形又は一文字形のいずれかであることが好ましく、更に好ましくはＶ字形、十字形、Ｙ字形である（請求項３）。ゴム部材１０の材質としては、シリコーンゴム、天然ゴム（例えば純化天然ゴム）、ポリウレタン、軟質ポリ塩化ビニル、スチレン−ブタジエン共重合体、ポリイソプレン、アクリロニトリル−ブタジエン系共重合体等が挙げられる。好ましくは純化天然ゴム又はポリイソプレンが好ましい。
【００２８】
本発明のニードルレス混注管１は、輸液側注管またはシリンジを接続するが、このシリンジの先端は、このままか又は好ましくはテーパーを有する筒状管を設けたものを使用する方がよい。このテーパー部の先端は、丸みを帯びた形状がよい。本発明のニードルレス混注管１は、適宜の用途に使用されるが、一例を挙げれば、輸液・輸血セット、血液回路、バッグ類の蓋、薬液ビンの蓋、検査器具等に用いられる。
【００２９】
【発明の効果】
本発明のニードルレス混注管は、弾性部材が、本管と側管との流通を遮断しており、該弾性部材の中央部には閉塞孔を有し、またこの弾性部材の上部には同心円状に円筒部分と円錐部分からなる凹部を有すると共に、該円筒部分の内壁は、その一部若しくは全部が蓋の舌片で覆われていることにより、シリンジ等を閉塞孔に挿入するのが容易であり、かつ成形が簡単かつ容易であり経済的であるという優れた効果を奏するものである。また本発明のニードルレス混注管は、上方凹部と下方凹部を有する断面Ｈ形状からなる円筒形状であり、上部の凹部が、下部が狭くなる階段状テーパーを有し、凹部上部の壁がすり鉢状に傾斜している弾性部材を用いることにより、シリンジ等の刺し込みが容易であり、かつ成形が簡単かつ容易であり経済的であるばかりでなく刺し込んだシリンジ等を抜去する際、薬液や血液等の飛び跳ねを防止することができる。
【００３０】
また、本発明のニードルレス混注管は、弾性部材の側面に凹部を有するか又は該側面に凹部を有しかつ上面と下面の周囲に環状凸部を有するか又は弾性部材が蓋の内径よりも小さい径を有し、かつ該弾性部材の側面に蓋の内径よりわずかに大きい径を有する環状凸部を有するか又は該環状突起を有する側面および上面と下面の周囲に環状凸部を有することにより、気密孔又は空間が形成され、この気密孔又は空間で構成された気密室により、蓋の側壁と弾性部材の凹部面および凸部面との間に気密孔又は空間が形成される。したがって、シリンジ等の密閉孔の開口が極めて容易にでき、必要以上の力を入れて挿入する必要はないという優れた効果を奏するものである。
【図面の簡単な説明】
【図１】本発明のニードルレス混注管を示す斜視図である。
【図２】図１の平面図である。
【図３】図１のニードルレス混注管および内蔵されたゴム部材を示す断面図である。
【図４】本発明のニードルレス混注管に内蔵される別のゴム部材の断面図である。
【図５】図４に示されるゴム部材の別の形態を示す断面図である。
【図６】本発明に用いる凸部を有する弾性部材の形状を示す断面図である。
【図７】本発明に用いる凸部を有する弾性部材の形状の別の実施形態を示す断面図である。
【図８】本発明に用いる凸部を有する弾性部材の形状の更に別の実施形態を示す断面図である。
【図９】本発明に用いる弾性部材の側壁に環状凹部を有する形状の実施形態を示す断面図である。
【図１０】本発明に用いる側壁に環状凸部を有する弾性部材を混注管に充填したところを示す断面図である。
【図１１】本発明に用いられる弾性部材を示す断面図並びに斜視図である。
【図１２】図１１の弾性部材を混注管に充填したところを示す斜視図である。
【符号の説明】
１混注管
２本管
３本管開口端（３ａ，３ｂ）
４側管
５蓋
６舌片（６ａ，６ｂ，６ｃ，６ｄ）
７円錐部分
８くぼみ
９溝
１０ゴム部材
１０ａ閉塞孔
１１凹部（ゴム部材の上方凹部）
１１ａ階段状テーパー
１１ｂ傾斜部
１１ｃ上部凹部
１１ｄ下部凹部
１１ｅ閉塞部
１２円筒部
１３断面三角形状
１４下方凹部（碗形状）
１５断面円形状凸部（１５ａ，１５ｂ）
１６断面円形状凸部（１６ａ，１６ｂ）
１７断面方形状凸部（１７ａ，１７ｂ）
１８断面円形状凹部（１８ａ，１８ｂ）
１９気密室（１９ａ，１９ｂ）
５１挿入孔（蓋の）
５２挿入孔壁（蓋の）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a needleless mixed injection tube, and more specifically, an operator connected to the side tube does not accidentally pierce the hand with a needle, and prevents jumping of a drug solution or blood when the syringe is removed, The present invention relates to a needleless mixed injection tube that can be easily connected without difficulty.
[0002]
[Prior art]
Conventionally, when supplying a medical solution or a nutrient solution to a patient, a tube is connected to a catheter inserted into a vein and a chemical solution or a nutrient solution is supplied to the tube. However, a plurality of drug solutions are often supplied to a patient. In such a case, a mixed injection pipe having a branch pipe is used. Conventionally, in this mixed injection tube, a rubber member is sealed at the opening of the branch tube, and a puncture needle is inserted into the rubber member and connected to a syringe or the like to inject a chemical solution or the like. Also known is a method in which a three-way cock is formed at the junction between the infusion main and the side pipe to inject a chemical solution or the like. Also, there is a product that has a structure that has a notch of one letter, X shape, etc. in a rubber stopper cap. A so-called needle-free dedicated male tube is inserted into this notch and a liquid is circulated. Yes.
[0003]
Furthermore, as disclosed in JP-A-8-206230, a needleless mixed injection tube for infusion sealed with an appropriately shaped rubber member is known, and this rubber member is provided with a close-contact hole such as a cross shape, It is shown that a needle or a syringe is inserted into the contact hole for communication. In another example, Japanese Patent Laid-Open No. 10-192415 discloses a mixed injection pipe having a branch pipe, the branch pipe having a rubber-like elastic body having a closed portion, and the rubber-like elastic body is supported in the branch pipe. What is described as being supported by a member is described.
[0004]
[Problems to be solved by the invention]
However, in the case where the rubber member is tightly plugged in the opening portion of the branch pipe of the mixed injection tube as described above, a considerably strong force is required to pierce the rubber member with the puncture needle. There was a risk of stabbed in the hand. Further, when using a three-way stopcock, there is a problem that contamination by germs tends to occur because the pipe line closing the three-way stopcock is exposed to the outside air. In addition, a rubber plug cap with a structure that has a single letter, X-shaped notch, etc. not only requires a dedicated male pipe for use, but also has a limit on the outer diameter of the male pipe, and is currently commercially available. A syringe having a tapered diameter taper portion is difficult to insert, and even if it can be inserted, there is a problem that a crack occurs in the cut portion.
[0005]
Furthermore, in the case of the rubber member of the mixed injection tube described in Japanese Patent Application Laid-Open No. 8-206230, which has been recently released, the side injection tube or the syringe can be connected and separated in an aseptic manner, like a puncture needle. Although it has an excellent effect in that it is not accidentally inserted into the hand, there is a problem that it is not easy to insert a syringe or the like. Further, when the inserted syringe or the like is removed, there is a problem that a chemical solution or blood jumps, and there is a rubber-like elastic body having a closed portion described in JP-A-10-192415, and this rubber-like elastic body In the case where the pipe is supported by the support member in the branch pipe, there is a problem that the structure is complicated and not economical.
[0006]
Accordingly, the present invention and the like have been able to devise a rubber member structure that is easy to pierce a syringe and the like, and that is simple and economical, as a result of various studies on these problems. Based on this finding, the needleless mixed injection tube of the present invention was completed. In addition, in the structure of the upper recess, a part of which is a stepped taper, and the closed portion between the upper recess and the lower recess is located above, so that the syringe inserted despite the simple structure The present inventors have found that, when removing the etc., it is possible to prevent jumping of chemicals and blood. Therefore, the first problem to be solved by the present invention is to provide a needleless mixed injection tube having a rubber member that can be easily inserted into a syringe or the like and that is easy, easy and economical to mold. is there. In addition, the second problem to be solved by the present invention is not only easy to insert a syringe and the like, and easy and easy to mold, but also economical to remove the inserted syringe and the like. And a needleless co-infusion tube having a rubber member capable of preventing jumping of blood and blood.
[0007]
[Means for Solving the Problems]
The above objects of the present invention can be achieved by the inventions described in the following claims.
[0008]
[Claim 1] The main pipe and the side pipe are made of a mixed injection pipe having a T-shape, the side pipe has a lid, and the side pipe has a needleless mixed injection pipe filled with an elastic member. The elastic member blocks the flow between the main pipe and the side pipe, and has a closing hole in the central portion of the elastic member, and is formed of a cylindrical portion and a conical portion concentrically above the elastic member. A needleless co-infusion tube characterized by having a recess and part or all of the inner wall of the cylindrical portion covered with a tongue piece of a lid.
[Claim 2] The elastic member has a cylindrical shape having an H-shaped cross section having an upper concave portion and a lower concave portion, and a closed portion between the upper concave portion and the lower concave portion is located above, and a lower concave portion of the upper concave portion is an upper portion. It has a step-like taper that is narrower than the concave portion, the wall of the upper concave portion is inclined in a mortar shape, and part or all of the inclined portion is covered with the wall of the insertion hole of the lid, The needleless mixed injection tube according to claim 1.
[Claim 3] The needleless co-infusion tube according to claim 1 or 2, wherein the side wall of the cylindrical portion of the recess provided on the upper surface of the elastic member has a taper downward.
[Claim 4] The blocking hole provided in the elastic member is any one of V-shaped, cross-shaped, Y-shaped, or single-character shaped. Needleless mixed injection tube.
[Claim 5] The elastic member according to any one of claims 1 to 4, wherein the elastic member has a concave portion on the side surface or has a concave portion on the side surface and an annular convex portion around the upper surface and the lower surface. The needleless mixed injection tube described.
[Claim 6] The elastic member has a diameter smaller than the inner diameter of the lid, and has an annular protrusion having a diameter slightly larger than the inner diameter of the lid on the side surface of the elastic member, and around the upper surface and the lower surface. The needleless mixed injection tube according to any one of claims 1 to 4, wherein the needleless mixed injection tube has an annular convex portion.
[0009]
As described in claim 1, in the needleless mixed injection tube of the present invention, the elastic member blocks the flow between the main tube and the side tube, and the elastic member has a blocking hole at the center. The upper portion of the elastic member has a concentric concave portion composed of a cylindrical portion and a conical portion, and the inner wall of the cylindrical portion is partially or entirely covered with a tongue piece of a lid. When inserting a syringe or the like by having this concave portion, the positioning is easy, and the inner wall of the cylindrical portion of the concave portion is partially or entirely covered with a tongue piece of the lid. And the like, the tongue piece cooperates with the conical portion of the rubber member to push out the concave portion, so that the syringe and the like can be easily inserted into the blocking hole.
[0010]
According to a second aspect of the present invention, the elastic member has a cylindrical shape having an H-shaped cross section having an upper concave portion and a lower concave portion, and the closed portion between the upper concave portion and the lower concave portion is located above, and the upper concave portion The lower concave portion has a step-like taper that is narrower than the upper concave portion, the wall of the upper concave portion is inclined in a mortar shape, and a part or all of the inclined portion is covered with the wall of the insertion hole of the lid As a result, it is easy to insert a syringe or the like, and it is easy and easy to mold and economical, and when removing the inserted syringe or the like, it is possible to prevent jumping of liquid medicine or blood. it can.
[0011]
According to a third aspect of the present invention, the side wall of the cylindrical portion of the recess provided on the upper surface of the elastic member has a downward taper, so that a syringe or the like can be more easily inserted.
[0012]
According to a fourth aspect of the present invention, the closing hole provided in the elastic member is any one of a V shape, a cross shape, a Y shape, or a single letter shape, so that the sealing can be sufficiently performed and a syringe or the like is inserted. It can be easily inserted in cooperation with the recess.
[0013]
According to a fifth aspect of the present invention, the side wall of the lid and the elastic member are provided with a concave portion on the side surface of the elastic member or a concave portion on the side surface and an annular convex portion around the upper surface and the lower surface. An airtight hole or space is formed between the concave surface and the convex surface. As a result, an airtight chamber constituted by an airtight hole or space usually provides a space for avoiding the deformation of an incompressible elastic member due to insertion of a syringe or the like. It is compressed by the elastic member and acts as an escape path for the elastic member. In addition, the gas (air) sealed in the hermetic chamber increases the holding power of the inserted syringe beyond the rebound resiliency inherently held by the elastic member due to its compressibility. It has the effect of increasing the closing force. Therefore, it is possible to very easily open a sealing hole such as a syringe, and there is an excellent effect that it is not necessary to insert with an excessive force.
[0014]
The elastic member has an annular protrusion having a diameter smaller than the inner diameter of the lid, and a side surface of the elastic member having a diameter slightly larger than the inner diameter of the lid, and an upper surface. In addition, an airtight hole or space is formed by having an annular convex portion around the lower surface and the airtight chamber configured by the airtight hole or space has the same excellent effect as described in claim 5. it can.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to them.
[0016]
FIG. 1 is a perspective view showing a needleless mixed injection tube of the present invention. FIG. 2 is a plan view of FIG. FIG. 3 is a cross-sectional view showing the needleless mixed injection tube of FIG. 1 and a built-in rubber member. FIG. 4 is a cross-sectional view of another rubber member built in the needleless mixed injection tube of the present invention. FIG. 5 is a cross-sectional view showing another form of the rubber member shown in FIG. FIG. 6 is a cross-sectional view showing the shape of an elastic member having a convex portion used in the present invention. FIG. 7 is a cross-sectional view showing another embodiment of the shape of an elastic member having a convex portion used in the present invention. FIG. 8 is a cross-sectional view showing still another embodiment of the shape of an elastic member having a convex portion used in the present invention. FIG. 9 is a cross-sectional view showing an embodiment of a shape having an annular recess on the side wall of the elastic member used in the present invention. FIG. 10 is a cross-sectional view showing a state where a mixed injection tube is filled with an elastic member having an annular convex portion on a side wall used in the present invention. FIG. 11 is a cross-sectional view and a perspective view showing an elastic member. FIG. 12 is a perspective view showing a state where the elastic member of FIG. 11 is filled in a mixed injection tube.
[0017]
1 and 2, the needleless mixed injection tube 1 is composed of a main tube 2 and a side tube 4 in a T shape. However, since it is clear that there is no need to stick to the T-shape and the Y-shape or the to-shape may be used, the T-shape is used to include these. The main pipe 2 has open ends 3a and 3b, to which a tube is usually connected. Further, the side tube 4 is closed by incorporating a rubber member 10 (see FIG. 3), and a lid 5 is further attached. The lid 5 has a depression 8 on the upper surface, a concentric insertion hole 51 in the center thereof, and the insertion piece 51 with tongue pieces 6a, 6b extending downward to cover the rubber member 10, 6c, 6d. The tongue pieces 6a, 6b, 6c, 6d have a taper toward the tip, and thus a groove 9 is formed between them. The tongue pieces 6a, 6b, 6c, and 6d have a function of expanding the cylindrical portion 12 (see FIG. 3) of the recess 11 as a stage before expanding the conical portion 7 of the recess 11 of the rubber member 10 when a syringe or the like is inserted. Thus, a syringe or the like can be easily and completely inserted into the conical portion and the blocking hole 10a.
[0018]
In FIG. 3 and FIG. 4, a rubber member 10 is built in the side tube 4 of the needleless mixed injection tube 1 and is further sealed with a lid 5. The cross-sectional shapes of the tongue pieces 6a, 6b, 6c, and 6d extending from the lid 5 are thicker in the downward direction, whereby the cylindrical portion of the concave portion of the rubber member is tapered downward. Therefore, since the diameter of the inner surface of the concave portion covered with the tongue piece decreases downward, the cylindrical portion 12 of the concave portion 11 can be easily expanded when a syringe or the like is inserted.
[0019]
On the other hand, as shown in FIG. 4, the rubber member 10 is formed of a cylindrical member. The rubber member 10 has a concentric blocking hole 10a at the center and a concentric recess at the center. The concave portion 11 includes a cylindrical portion and a conical portion, and has a shape in which a syringe or the like can be easily inserted. The inner wall of the cylindrical portion may be formed vertically, but it is preferable that the inner wall has a taper downward from the viewpoint of easy positioning when a syringe or the like is inserted (claim 2).
[0020]
Further, the rubber member 10 is preferably formed with a concave portion or a convex portion on the side surface or the bottom surface. The recess shape is preferably a triangular cross section 13 as shown in FIG. 4 or a saddle shape 14 as shown in FIG. 5, but is not limited thereto (Claim 4). The length of the blocking hole 10a is determined by h ₂ = h ₀ −h ₁ , but can be appropriately determined depending on the intended use.
[0021]
In the present invention, when an embodiment in which a concave portion or a convex portion is further provided in the elastic member is given, as shown in FIGS. 6A and 6B, each has a semicircular cross section around the side wall 10 b of the elastic member 10. Annular projections 15a and 15b are provided. FIG. 10 shows a state in which the elastic member 10 is filled in the side pipe 4 of the mixed injection pipe and the lid 5 is provided. At this time, an airtight chamber is provided between the side pipe 4 and the inner wall of the lid 5 and the side wall of the elastic member 10. 19a and 19b are formed. The airtight chambers 19a and 19b are kept airtight because the diameter of the annular projections 15a and 15b having a semicircular cross section is slightly larger than the diameter of the inner wall of the side tube. In FIGS. 7a and 7b, annular projections 15a and 15b having a semicircular cross section are provided around the side wall 10b of the elastic member 10, respectively. Semicircular annular projections 16a and 16b are provided. Further, in FIGS. 8a and 8b, annular protrusions 17a and 17b having a square cross section are provided around the side wall 10b of the elastic member 10, respectively, and further, the upper and lower surfaces of the elastic member 10 are provided with a half-section in cross section. Circular annular protrusions 16a and 16b are provided.
[0022]
The cross-sectional shapes of the annular protrusions 15a, 15b, 16a, 16b, 17a, and 17b shown in FIGS. 6 to 8 are not limited to these, and the cross-sections are semi-elliptical, triangular, semi-pentagonal, semi-hexagonal, etc. Any shape may be used. These annular protrusions 15 a, 15 b, 16 a, 16 b, 17 a, and 17 b act as seal lips when the side tube 4 is filled, and are formed between the side surfaces of the lid 5 provided on the side tube 4. The airtight hole becomes an airtight chamber. The operation of this hermetic chamber is as described above.
[0023]
In a and b of FIG. 9, annular recesses 18 a and 18 b each having a semicircular cross section are provided on the side wall of the elastic member 10 along the periphery thereof. 9C and 9D, the side wall of the elastic member 10 is provided with annular recesses 18a and 18b each having a semicircular cross section along the periphery thereof, and the upper and lower surfaces of the elastic member 10 are further provided. Is provided with annular protrusions 16a and 16b having a semicircular cross section. In the present invention, the recess 18a or 18b has an airtight hole or airtight chamber formed between the side wall of the lid 5 and exhibits the same excellent effects as the airtight chamber formed by the convex portion. Moreover, instead of the annular recesses 18a and 18b having a semicircular cross section, an arbitrary shape such as a semi-elliptical shape, a triangular shape, a semi-pentagonal shape, and a semi-hexagonal shape may be used.
[0024]
11A and 11B, the elastic member 10 has an H-shaped cross section, and has an upper recess 11 and a hook-shaped lower recess 14 with a closing portion 11e having a closing hole 10a as a flange. The upper concave portion 11 includes an upper concave portion 11c and a lower concave portion 11d. The side wall of the upper concave portion 11 has a stepped taper 11a and the upper concave portion side wall 11b is inclined in a bowl shape. Since the recess 11 has a stepped taper 11a, it is easy to pierce a syringe and the like, and the molding is simple and easy and economical. It is possible to prevent jumping and the like.
[0025]
In the present invention, the elastic member 10 has an H-shaped cross section, but the thickness of the blocking portion 11e between the upper concave portion 11 and the lower concave portion 14 is close to the depth between the upper concave portion 11 and the lower concave portion 14. Although related, therefore, the thickness of the blocking portion 11e is determined between 0.3 and 3 mm. If the thickness is less than 0.3 mm, it is not preferable because the liquid or blood can easily be oozed out and the air can be easily sucked. On the other hand, when the thickness exceeds 3 mm, it is difficult to insert a tapered tip of a syringe or the like, and it is difficult to insert the slit in forming the slit of the blocking hole 10a. Therefore, the thickness of the blocking portion 11e can be determined while appropriately testing between 0.3 and 3 mm depending on the type of insertion member such as a syringe and shunt joint and the type of application such as a medical device. it can.
[0026]
FIG. 12 is a view in which the mixed injection tube 1 is filled with the elastic member 10 of FIG. 11, and the lid 5 used at this time has a structure in which the side wall 52 of the insertion hole 51 covers a part of the elastic member 10. Yes. As a result, the elastic member 10 can be reliably fixed to the mixed injection tube 1 and also serves as an insertion guide for a tapered tip portion of a syringe or the like.
[0027]
The closing hole 10a provided in the rubber member 10 used in the present invention is preferably V-shaped, cross-shaped, Y-shaped or single-shaped, and more preferably V-shaped, cross-shaped, Y-shaped ( Claim 3). Examples of the material of the rubber member 10 include silicone rubber, natural rubber (for example, purified natural rubber), polyurethane, soft polyvinyl chloride, styrene-butadiene copolymer, polyisoprene, acrylonitrile-butadiene copolymer, and the like. A purified natural rubber or polyisoprene is preferable.
[0028]
The needleless mixed injection tube 1 of the present invention is connected to an infusion side injection tube or a syringe, and it is better to use the tip of this syringe as it is or preferably provided with a cylindrical tube having a taper. The tip of this taper portion should have a rounded shape. The needleless co-infusion tube 1 of the present invention is used for an appropriate application. For example, the needleless co-infusion tube 1 is used for an infusion / transfusion set, a blood circuit, a lid of a bag, a lid of a chemical bottle, an inspection instrument, and the like.
[0029]
【The invention's effect】
In the needleless mixed injection pipe according to the present invention, the elastic member blocks the flow between the main pipe and the side pipe, and has a closing hole at the center of the elastic member, and a concentric circle above the elastic member. It is easy to insert a syringe or the like into the obstruction hole because the inner wall of the cylindrical part is covered with a tongue piece of the lid. In addition, an excellent effect is obtained that the molding is simple, easy and economical. Further, the needleless mixed injection tube of the present invention has a cylindrical shape having an H-shaped cross section having an upper concave portion and a lower concave portion, the upper concave portion has a stepped taper with a narrow lower portion, and the upper wall of the concave portion has a mortar shape. By using a slanted elastic member, it is easy to insert a syringe or the like, and it is easy and easy to mold and economical. It is possible to prevent jumping and the like.
[0030]
Further, the needleless mixed injection tube of the present invention has a recess on the side surface of the elastic member, or has a recess on the side surface and has an annular protrusion around the upper surface and the lower surface, or the elastic member is larger than the inner diameter of the lid. By having an annular convex portion having a small diameter and having a diameter slightly larger than the inner diameter of the lid on the side surface of the elastic member, or having an annular convex portion around the side surface and the upper and lower surfaces having the annular projection. An airtight hole or space is formed, and an airtight hole or space is formed between the side wall of the lid and the concave surface and the convex surface of the elastic member by the airtight chamber constituted by the airtight hole or space. Therefore, it is possible to very easily open a sealing hole such as a syringe, and there is an excellent effect that it is not necessary to insert with an excessive force.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a needleless mixed injection tube of the present invention.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is a cross-sectional view showing the needleless co-infusion tube of FIG. 1 and a built-in rubber member.
FIG. 4 is a cross-sectional view of another rubber member built in the needleless mixed injection tube of the present invention.
FIG. 5 is a cross-sectional view showing another form of the rubber member shown in FIG. 4;
FIG. 6 is a cross-sectional view showing the shape of an elastic member having a convex portion used in the present invention.
FIG. 7 is a cross-sectional view showing another embodiment of the shape of an elastic member having a convex portion used in the present invention.
FIG. 8 is a cross-sectional view showing still another embodiment of the shape of an elastic member having a convex portion used in the present invention.
FIG. 9 is a cross-sectional view showing an embodiment having a shape having an annular recess on a side wall of an elastic member used in the present invention.
FIG. 10 is a cross-sectional view showing a state where a mixed injection tube is filled with an elastic member having an annular convex portion on a side wall used in the present invention.
FIG. 11 is a cross-sectional view and a perspective view showing an elastic member used in the present invention.
12 is a perspective view showing a state where the elastic member of FIG. 11 is filled in a mixed injection tube. FIG.
[Explanation of symbols]
1 Mixed injection pipe
2 main
3 Main pipe open end (3a, 3b)
4-side pipe
5 lid
6 Tongue pieces (6a, 6b, 6c, 6d)
7 Conical part
8 Recess
9 groove
10 Rubber member
10a Blockage hole
11 Recess (Upper recess of rubber member)
11a Step taper
11b Inclined part
11c Top recess
11d Lower recess
11e Blocking part
12 Cylindrical part
13 Triangular section
14 Lower concave part (saddle shape)
15 Cross-section convex section (15a, 15b)
16 Cross section convex part (16a, 16b)
17 Cross section convex part (17a, 17b)
18 circular recess in cross section (18a, 18b)
19 Airtight room (19a, 19b)
51 Insertion hole (for lid)
52 Insertion hole wall (of the lid)

Claims

The main pipe and the side pipe are composed of a mixed injection pipe having a T-shape, the side pipe has a lid, and the side pipe is filled with an elastic member. The flow between the tube and the side tube is blocked, the central portion of the elastic member has a blocking hole, and the upper portion of the elastic member has a concentric concave portion composed of a cylindrical portion and a conical portion, A needleless co-infusion tube, wherein the inner wall of the cylindrical portion is partially or entirely covered with a tongue piece of a lid.

A staircase in which the elastic member has a cylindrical shape having an H-shaped cross section having an upper concave portion and a lower concave portion, a closed portion between the upper concave portion and the lower concave portion is located above, and the lower concave portion of the upper concave portion is narrower than the upper concave portion. 2. The taper of claim 1, wherein the upper wall of the concave portion is inclined in a mortar shape, and a part or all of the inclined portion is covered with a wall of an insertion hole of the lid. The needleless mixed injection tube described.

The needleless co-infusion tube according to claim 1 or 2, wherein the side wall of the cylindrical portion of the concave portion provided on the upper surface of the elastic member has a taper downward.

The needleless mixed injection tube according to any one of claims 1 to 3, wherein the blocking hole provided in the elastic member is any one of a V shape, a cross shape, a Y shape, and a single character shape.

The needleless mixed injection according to any one of claims 1 to 4, wherein the elastic member has a concave portion on a side surface, or has a concave portion on the side surface, and an annular convex portion around the upper surface and the lower surface. tube.

The elastic member has a diameter smaller than the inner diameter of the lid, and has an annular convex portion having a diameter slightly larger than the inner diameter of the lid on the side surface of the elastic member, and an annular convex portion around the upper surface and the lower surface. The needleless mixed injection tube according to any one of claims 1 to 4, wherein the needleless mixed injection tube is provided.