JPH0362426B2 - - Google Patents
Info
- Publication number
- JPH0362426B2 JPH0362426B2 JP59188119A JP18811984A JPH0362426B2 JP H0362426 B2 JPH0362426 B2 JP H0362426B2 JP 59188119 A JP59188119 A JP 59188119A JP 18811984 A JP18811984 A JP 18811984A JP H0362426 B2 JPH0362426 B2 JP H0362426B2
- Authority
- JP
- Japan
- Prior art keywords
- holder
- medical stopcock
- stopcock
- medical
- pot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 20
- 229920005989 resin Polymers 0.000 claims description 20
- 230000013011 mating Effects 0.000 claims description 19
- 229920001971 elastomer Polymers 0.000 claims description 15
- 239000000806 elastomer Substances 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 6
- 229920006124 polyolefin elastomer Polymers 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 31
- 210000002700 urine Anatomy 0.000 description 27
- 239000000463 material Substances 0.000 description 16
- 239000004743 Polypropylene Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- -1 polypropylene Polymers 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 150000001336 alkenes Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 5
- 239000008280 blood Substances 0.000 description 3
- 210000004369 blood Anatomy 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005251 gamma ray Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
Description
【発明の詳細な説明】
発明の背景
技術分野
本発明は医療用活栓に関する。
先行技術
従来、導尿チユーブ、採血チユーブ、輸液チユ
ーブ等に接続し、用いられる医療用活栓として
は、例えば第５図ないし第６図に示すものがあ
る。この医療用活栓１０は、三方活栓に係り、３
つの流体ロポート１１Ａ，１１Ｂ，１１Ｃを備え
たホルダ１２と、該ホルダ１２に嵌合され、相互
に連通する第１口部１４Ａ、第２口部１４Ｂおよ
び第３口部１４Ｃを備えたコツク１５とから構成
される。コツク１５には、レバー１６が設けら
れ、該レバー１６を矢示Ａ方向に回転することに
より、コツク１５をホルダ１２に対して摺動させ
る状態で回転可能としている。すなわち医療用活
栓１０は、第１〜第３の流体ロポート１１Ａ，１
１Ｂ，１１Ｃと第１口部〜第３口部１４Ａ，１４
Ｂ，１４Ｃとの接続を切換え可能とし、またレバ
ー１６の回転操作により接続状態の調整を図り、
各ポートを流れる流体、例えば、輸液剤、血液、
尿等の流量調整を可能としている。
ホルダ１２に対するコツク１５の嵌合は、コツ
ク１５の外径よりもホルダ１２の外径を小とする
マイナス嵌合状態で行われ、これにより、ホルダ
１２の内面１７とコツク１５の外面１８の密着性
を確保している。ホルダ１２の内面１７およびコ
ツク１５の外面１８は、両者の密着性を向上する
ために真円度の優れたものが望ましく、また、経
時的変形の少ないものが望まれている。コツク１
５の材質としては、ホルダ１２とコツク１５の密
着性を向上させるために、弾性に富む軟質樹脂材
を用いることが考えられる。しかしながら、コツ
ク１５を軟質樹脂材で形成する場合、レバー１６
を回転操作する際、コツク１５全体に撓みが生
じ、コツク１５の回転機能が悪くなるという問題
がある。このため、コツク１５に剛性を有する硬
質樹脂材を用い、その分、コツク１５に対するホ
ルダ１２のマイナス嵌合幅を大とすることが考え
られる。これとともに、第５図に示すようにコツ
ク１５の底部にフアスナーピン１９を設け、ま
た、ホルダ１２の底部にピン孔２０を設け、両者
を嵌合するようにする。すなわち、硬質樹脂材を
用いることによるホルダ１２とコツク１５の密着
性の低下分を、マイナス嵌合幅を大とすることで
補い、また密着性低下により考えられるコツク１
５の浮き上りをフアスナーピン１９とピン孔２０
の嵌合により防止し、コツク１５がホルダ１２か
ら抜け出る等のことがないようにするものであ
る。
しかしながら、上記のようにマイナス嵌合幅を
大とする場合、ホルダ１２とコツク１５の摺動抵
抗が大となり、コツク１５の回転機能が悪くなる
という問題がある。また、コツク１５にフアスナ
ーピン１９を設けたり、あるいはホルダ１２にピ
ン孔２０を設ける場合、医療用活栓１０の構造が
複雑となる問題がある。
発明の目的
本発明は、コツクの回転機能を損なうことな
く、コツクとホルダの密着性を簡易な構造により
向上可能とする医療用活栓を提供することを目的
としている。
発明の構成
上記目的を達成するために、本発明は、ホルダ
と、該ホルダの内径より大なる外径を備えて該ホ
ルダに嵌合するコツクとからなる医療用活栓にお
いて、該コツクの基体を比較的硬質な樹脂によつ
て形成するとともに、該コツクの該ホルダに嵌合
するすり合わせ部を比較的軟質な弾性を有する樹
脂によつて形成し、該基体の外周部に該すり合わ
せ部を二色成形により一体に設け、該基体の該す
り合わせ部が設けられる部分の内部には該基体の
端面に開口する空洞部を設けてあるようにしたも
のである。
また、本発明に係る医療用活栓は、前記すり合
わせ部をオレフイン系エラストマー又はそれを配
合するようにしたものである。
また、本発明に係る医療用活栓は、前記すり合
わせ部をスチレン系エラストマー又はそれを配合
するようにしたものである。
また、本発明に係る医療用活栓は、前記すり合
わせ部のシヨアＣ硬度を20〜40としたものであ
る。
また、本発明に係る医療用活栓は、ホルダとコ
ツクの嵌合面が0.5Kg／cm2の空気圧力で漏れずに、
かつ初期摺動抵抗が1.0Kg／cm以下としたもので
ある。
また、本発明に係る医療用活栓は、コツクの外
径とホルダの内径との差が0.2〜0.24mmとしたも
のである。
また、本発明に係る医療用活栓は、ホルダおよ
びコツクをガンマ線により滅菌処理したものであ
る。
発明の作用
本発明によれば、下記〜の作用効果があ
る。
医療用活栓は、コツクの基体を比較的硬質な
樹脂によつて形成したから、コツク全体の剛性
を保持し、コツクの回転機能を確保することが
できる。
又、コツクのホルダに嵌合するすり合わせ部
を比較的軟質な弾性を有する樹脂によつて形成
したから、ホルダとコツクの密着性を確実に保
持できる。
この時、コツクの基体とすり合わせ部とを二
色成形により一体に形成したから、基体に回転
操作力を付与する時、すり合わせ部は基体に対
して全くずれることなく該基体とともに滑らか
に回転する。このことは、軟質すり合わせ部が
基体まわりで局部的にずれる等による該すり合
わせ部のねじれ変形を防止し、すり合わせ部が
上記ねじれ変形に起因して基体の外周部との間
に形成する如くの流体リーク経路の発生を防止
でき、ホルダとコツクの密着性をより確実に保
持できることを意味する。
又、基体のすり合わせ部が設けられる部分の
内部には該基体の端面に開口する空洞部を設け
てあるようにしたから、該基体のすり合わせ部
が設けられる部分において、コツクの回転方向
には一定の剛性を確保し、断面半径方向には若
干の可撓性を付与することができる。このこと
は、コツクのすり合わせ部をホルダに嵌合する
時、小内径のホルダにより、すり合わせ部のみ
ならず、基体のすり合わせ部が設けられる部分
をも弾性的にたわみ変形させ、ひいては該基体
のすり合わせ部が設けられる部分の断面半径方
向での弾性的なたわみ復元力により該すり合わ
せ部をホルダ内面に弾発的に圧着せしめ、ホル
ダとコツクの密着性をより確実に保持できるこ
とを意味する。
上記〜により、従来のようにコツクに対
してホルダのマイナス嵌合幅を大とすることな
く、しかもコツクの浮き上がり防止のためにフ
アスナーピンやピン孔を設ける必要もなく、簡
易な構造により確実にホルダとコツクの密着性
を保持することができる。
発明の具体的説明
この時、コツク３５の基体３９とすり合わせ部
４０とを二色成形により一体形成したから、基体
３９に回転操作力を付与する時、すり合わせ部４
０は基体３９に対して全くずれることなく該基体
３９とともに滑らかに回転する。このことは、軟
質すり合わせ部４０が基体３９まわりで局部的に
ずれる等による該すり合わせ部４０のねじれ変形
を防止し、すり合わせ部４０が上記ねじれ変形に
起因して基体３９の外周部との間に形成する如く
の流体リーク経路の発生を防止でき、ホルダ３２
とコツク３５の密着性をより確実に保持できるこ
とを意味する。
又、基体３９のすり合わせ部４０が設けられる
部分の内部には該基体３９の端面に開口する空洞
部１０１，１０２を設けるようにしたから、該基
体３９のすり合わせ部４０が設けられる部分にお
いて、コツク３５の回転方向には一定の剛性を確
保し、断面半径方向には若干の可撓性を付与する
ことができる。このことは、コツク１５のすり合
わせ部４０をホルダ３２に嵌合する時、小内径の
ホルダ３２により、すり合わせ部４０のみなら
ず、基体３９のすり合わせ部４０が設けられる部
分をも弾性的にたわみ変形させ、ひいては、該基
体３９のすり合わせ部４０が設けられる部分の断
面半径方向での弾性的なたわみ復元力により該す
り合わせ部４０をホルダ３２の内面に弾発的に圧
着せしめ、ホルダ３２とコツク３５の密着性をよ
り確実に保持できることを意味する。
第１図は本発明の一実施例に係る医療用活栓を
示す一部破断の正面図、第２図は第１図の−
線に沿う断面図である。医療用活栓３０は、三方
活栓に係り、３つの流体口ポート３１Ａ，３１
Ｂ，３１Ｃを備えたホルダ２２と、該ホルダ３２
に嵌合され、相互に連通する第１口部３４Ａ、第
２口部３４Ｂおよび第３口部３４Ｃを備えたコツ
ク３５とから構成される。コツク３５には、レバ
ー３６が設けられ、該レバー３６を矢示Ｂ方向に
回転することにより、コツク３５をホルダ３２に
対して摺動させる状態で回転可能としている。こ
れにより、例えば第２図に示すように、第１の流
体口ポート３１Ａと第１口部３４Ａを、第２の流
体口ポート３１Ｂと第２口部３４Ｂを、第３の流
体口ポート３１Ｃと第３口部３４Ｃとを接続する
ことが可能となり、また、レバー３６の回転操作
により、接続状態の調整を図り、各ポートを流れ
る流体、例えば輸液剤、血液、尿等の流量調整を
可能としている。さらに、医療用活栓３０は、レ
バー３６の回転操作により、第１の流体口ポート
３１Ａと第２口部３４Ｂを接続し、かつ第２の流
体口ポート３１Ｂと第１口部３４Ａを接続する態
様、あるいは第２の流体口ポート３１Ｂと第１口
部３４Ａを接続し、かつ第３の流体口ポート３１
Ｃと第２口部３４Ｂを接続する態様、さらに第１
の流体口ポート３１Ａと第３口部３４Ｃを接続
し、かつ第３の流体口ポート３１Ｃと第１口部３
４Ａを接続する態様のいずれかに切換可能として
いる。
ホルダ３２に対するコツク３５の嵌合は、コツ
ク３５の外径よりもホルダ３２の内径を小とする
マイナス嵌合状態で行われ、ホルダ３２の内面３
７とコツク３５の外面３８の密着性を確保してい
る。コツク３５は、基体３９の部分を比較的硬質
な樹脂によつて形成し、また該基体３９のホルダ
３２に対する嵌合部分の全周部を、比較的軟質な
弾性を有する樹脂により形成し、該嵌合部分をホ
ルダ３２の内面３７に対するすり合わせ部４０と
している。すなわち、コルク３５は、基体３９と
すり合わせ部４０とを二色成形により一体に形成
され、両者の一体化は、例えば基体３９とすり合
わせ部４０とを互いに相溶性を有する材質、例え
ば基体３９をポリプロピレン、すり合わせ部４０
をオレフイン系エラストマーで形成することによ
り行うようにしている。
基体３９の材質としては、ポリプロピレン等の
硬質樹脂材が用いられ、コツク３５の全体の剛性
を保持するようにしている。一方、すり合わせ部
４０の材質には、オレフイン系エラストマーやス
チレン系エラストマー等の比較的軟質で弾性を有
する樹脂材、あるいはこれらの樹脂材を配合する
樹脂材が用いられる。これにより、ホルダ３２の
内面３７との密着性を確保するとともに、ホルダ
３２に対してコツク３５を回転させる場合、両者
の摺動抵抗を極力少ないものにしている。
そして、コツク３５において、基体３９のすり
合わせ部４０が設けられる部分の内部には、第１
図に示す如く、該基体３９のレバー３６が設け
られる側の端面に開口する空洞部１０と、該基
体３９のレバー３６が設けられない側の自由端面
に開口する空洞部１０２とを設けてある。
ここで、ホルダ３２の材質にメタクリル樹脂
｛商品名：デルペツト、旭化成工業(株)製｝を使用
するとともに、すり合わせ部４０の材質としてポ
リプロピレンとスチレン系エラストマー｛商品
名：ラバロン、三菱油化(株)製｝とをそれぞれ所定
の配合比（重量比）で配合させたものを使用し、
それぞれ異なる配合比とした場合における、すり
合わせ部４０の硬度、すり合わせ部４０とホルダ
３２の内面３７との密着性、さらに、コツク３５
とホルダ３２の嵌合時におけるホルダ３２の内径
変化を、それぞれ測定した。すり合わせ部４０の
硬度は、シヨアＣ型のかたさ試験機により測定を
行つた。密着性については、第２図に示すように
第１の流体口ポート３１Ａと第１口部３４Ａを、
第２の流体口ポート３１Ｂと第２口部３４Ｂを、
第３の流体口ポート３１Ｃと第３口部３４とをそ
れぞれ接続する状態とし、この状態で第２の流体
口ポート３１Ｂおよび第３の流体口ポート３１Ｃ
を閉塞するとともに、第１の流体口ポート３１Ａ
から0.4Kg／cm2、1.0Kg／cm2、2.0Kg／cm2のそれぞれ
の空気圧を加えることによりその漏れを測定し
た。測定は、各空気圧についてそれぞれ５回行な
い、５回のうち何回漏れたかの試験を行うものと
した。さらに、ホルダ３２の内径変化は、コツク
３５を嵌合する前におけるホルダ３２の内径を
φ5.98mmとするとともに、嵌合後におけるホルダ
３２の内径をそれぞれ測定し、該測定結果を嵌合
する前におけるホルダ３２の内径と比較すること
とした。なお、測定は、該コツク３５をホルダ３
２と嵌合させて、60℃のオーブンで24時間加熱し
た後に行うようにする。測定結果は、次表の通り
である。測定結果BACKGROUND OF THE INVENTION Technical Field The present invention relates to medical stopcocks. Prior Art Conventionally, there are medical stopcocks shown in FIGS. 5 and 6, which are connected to urine drainage tubes, blood collection tubes, infusion tubes, and the like. This medical stopcock 10 is a three-way stopcock.
A holder 12 equipped with three fluid ports 11A, 11B, and 11C, and a pot 15 fitted into the holder 12 and equipped with a first opening 14A, a second opening 14B, and a third opening 14C that communicate with each other. It consists of The pot 15 is provided with a lever 16, and by rotating the lever 16 in the direction of arrow A, the pot 15 can be rotated in a sliding manner with respect to the holder 12. That is, the medical stopcock 10 has the first to third fluid ports 11A, 1
1B, 11C and the first to third mouth parts 14A, 14
The connection with B and 14C can be switched, and the connection state can be adjusted by rotating the lever 16.
Fluids flowing through each port, e.g., intravenous fluids, blood,
This makes it possible to adjust the flow rate of urine, etc. The fitting of the pot 15 to the holder 12 is performed in a negative fitting state in which the outer diameter of the holder 12 is smaller than the outer diameter of the pot 15, thereby ensuring close contact between the inner surface 17 of the holder 12 and the outer surface 18 of the pot 15. Ensures sex. It is desirable that the inner surface 17 of the holder 12 and the outer surface 18 of the pot 15 have excellent roundness in order to improve the adhesion between the two, and that they are less likely to deform over time. Kotoku 1
As the material of 5, a soft resin material with high elasticity may be used in order to improve the adhesion between the holder 12 and the grip 15. However, when the lever 15 is made of a soft resin material, the lever 16
There is a problem in that when the rotation operation is performed, the entire pot 15 is bent, and the rotation function of the pot 15 is deteriorated. For this reason, it is conceivable to use a hard resin material having rigidity for the socket 15 and to increase the negative fitting width of the holder 12 to the socket 15 accordingly. At the same time, as shown in FIG. 5, a fastener pin 19 is provided at the bottom of the lock 15, and a pin hole 20 is provided at the bottom of the holder 12 so that the two fit together. In other words, the decrease in the adhesion between the holder 12 and the connector 15 due to the use of a hard resin material is compensated for by increasing the negative fitting width, and the decrease in the adhesiveness between the holder 12 and the connector 15, which may be caused by the decrease in adhesiveness, is compensated for by increasing the negative fitting width.
Fix the raised part of 5 with fastener pin 19 and pin hole 20.
This is to prevent the lock 15 from slipping out of the holder 12. However, when the negative fitting width is increased as described above, there is a problem that the sliding resistance between the holder 12 and the socket 15 increases, and the rotational function of the socket 15 deteriorates. Further, when the fastener pin 19 is provided in the stopcock 15 or the pin hole 20 is provided in the holder 12, there is a problem that the structure of the medical stopcock 10 becomes complicated. OBJECTS OF THE INVENTION An object of the present invention is to provide a medical stopcock that can improve the adhesion between the stopcock and the holder with a simple structure without impairing the rotating function of the stopcock. Structure of the Invention In order to achieve the above object, the present invention provides a medical stopcock comprising a holder and a stop having an outer diameter larger than the inner diameter of the holder and fitting into the holder. It is formed from a relatively hard resin, and the mating part of the cot that fits into the holder is formed from a relatively soft elastic resin, and the mating part is made of two colors on the outer periphery of the base. The base member is integrally formed by molding, and a hollow portion opening to the end face of the base member is provided inside the portion of the base member where the abutment portion is provided. Further, in the medical stopcock according to the present invention, the abutment portion is made of an olefin elastomer or is blended with an olefin elastomer. Further, in the medical stopcock according to the present invention, the abutting portion is made of a styrene elastomer or is blended with a styrene elastomer. Further, in the medical stopcock according to the present invention, the sliding portion has a shore C hardness of 20 to 40. In addition, the medical stopcock according to the present invention has an air pressure of 0.5 kg/cm 2 that prevents leakage on the fitting surface of the holder and the stopcock.
And the initial sliding resistance is 1.0Kg/cm or less. Further, in the medical stopcock according to the present invention, the difference between the outer diameter of the stopcock and the inner diameter of the holder is 0.2 to 0.24 mm. Further, in the medical stopcock according to the present invention, the holder and the stopper are sterilized using gamma rays. Effects of the Invention According to the present invention, there are the following effects. Since the base of the medical stopcock is made of a relatively hard resin, the rigidity of the entire stopcock can be maintained and the rotation function of the stopcock can be ensured. Furthermore, since the fitting portion that fits into the holder of the pot is made of a relatively soft and elastic resin, the adhesion between the holder and the pot can be reliably maintained. At this time, since the base body and the abutment part are integrally formed by two-color molding, when a rotational operation force is applied to the base body, the abutment part rotates smoothly together with the base body without any deviation from the base body. This prevents twisting deformation of the soft fitting part due to local displacement of the soft fitting part around the base, and prevents fluid from forming between the fitting part and the outer periphery of the base due to the above-mentioned torsional deformation. This means that the occurrence of leak paths can be prevented and the adhesion between the holder and the pot can be maintained more reliably. In addition, since a cavity opening to the end face of the base is provided inside the portion of the base where the rubbing portion is provided, the rotational direction of the pot is constant in the portion of the base where the rubbing portion is provided. It is possible to ensure rigidity and provide some flexibility in the radial direction of the cross section. This means that when the fitting part of the Kotoku is fitted into the holder, the holder with a small inner diameter elastically deforms not only the fitting part but also the part of the base where the fitting part is provided, which in turn causes the fitting of the base to This means that the elastic restoring force in the cross-sectional radial direction of the part where the part is provided elastically presses the fitting part against the inner surface of the holder, and the adhesion between the holder and the pot can be maintained more reliably. Due to the above ~, there is no need to increase the negative fitting width of the holder with respect to the lock as in the past, and there is no need to provide fastener pins or pin holes to prevent the lock from lifting, and the simple structure allows for reliable operation. The adhesion between the holder and the pot can be maintained. DETAILED DESCRIPTION OF THE INVENTION At this time, since the base body 39 of the Kotoku 35 and the abutment part 40 are integrally formed by two-color molding, when applying rotational operation force to the base body 39, the abutment part 40
0 rotates smoothly together with the base body 39 without any deviation from the base body 39. This prevents twisting deformation of the soft fitting part 40 due to local displacement of the soft fitting part 40 around the base body 39, and prevents the rubbing part 40 from forming a gap between the outer peripheral part of the base body 39 and the like due to the above-mentioned torsional deformation. The holder 32 can prevent the occurrence of fluid leak paths such as
This means that the adhesion of the Kotoku 35 can be maintained more reliably. Further, since the hollow portions 101 and 102 that open to the end face of the base body 39 are provided inside the portion of the base body 39 where the abutment portion 40 is provided, the portion of the base body 39 where the abutment portion 40 is provided is provided with the hollow portions 101 and 102. A certain degree of rigidity can be ensured in the rotational direction of 35, and some flexibility can be imparted in the radial direction of the cross section. This means that when the fitting part 40 of the Kotoku 15 is fitted into the holder 32, not only the fitting part 40 but also the part of the base body 39 where the fitting part 40 is provided is elastically deformed due to the small inner diameter of the holder 32. In turn, the elastic deflection restoring force in the cross-sectional radial direction of the portion of the base body 39 where the abutment part 40 is provided elastically presses the abutment part 40 onto the inner surface of the holder 32, and the holder 32 and the grip 35 are This means that the adhesion can be maintained more reliably. Fig. 1 is a partially cutaway front view showing a medical stopcock according to an embodiment of the present invention, and Fig. 2 is a - of Fig. 1.
It is a sectional view along a line. The medical stopcock 30 is a three-way stopcock, and has three fluid ports 31A, 31.
A holder 22 equipped with B and 31C, and the holder 32
It is comprised of a pot 35 that is fitted into the body and has a first mouth part 34A, a second mouth part 34B, and a third mouth part 34C that communicate with each other. The pot 35 is provided with a lever 36, and by rotating the lever 36 in the direction of arrow B, the pot 35 can be rotated in a sliding manner with respect to the holder 32. As a result, as shown in FIG. 2, for example, the first fluid port 31A and the first port 34A, the second fluid port 31B and the second port 34B, and the third fluid port 31C. The connection state can be adjusted by rotating the lever 36, and the flow rate of fluids flowing through each port, such as infusion drugs, blood, urine, etc., can be adjusted. There is. Furthermore, the medical stopcock 30 has a mode in which the first fluid port 31A and the second port 34B are connected by rotation of the lever 36, and the second fluid port 31B and the first port 34A are connected. , or connect the second fluid port 31B and the first port 34A, and connect the third fluid port 31
C and the second opening 34B, and the first
The fluid port 31A and the third port 34C are connected, and the third fluid port 31C and the first port 3 are connected to each other.
4A can be connected to any one of the modes. The fitting of the holder 35 to the holder 32 is performed in a negative fitting state in which the inner diameter of the holder 32 is smaller than the outer diameter of the holder 35, and the inner diameter 3 of the holder 32 is
7 and the outer surface 38 of the pot 35 are ensured. The Kotoku 35 has a base body 39 made of a relatively hard resin, and the entire circumference of the part of the base body 39 that fits into the holder 32 made of a relatively soft elastic resin. The fitting portion is a fitting portion 40 against the inner surface 37 of the holder 32. That is, the cork 35 is integrally formed by two-color molding of the base body 39 and the mating part 40. For example, the base body 39 and the mating part 40 are made of a material that is compatible with each other, for example, the base body 39 is made of polypropylene. , rubbing part 40
This is done by forming it from an olefin elastomer. As the material of the base body 39, a hard resin material such as polypropylene is used to maintain the overall rigidity of the pot 35. On the other hand, the material of the mating portion 40 is a relatively soft and elastic resin material such as an olefin elastomer or a styrene elastomer, or a resin material containing these resin materials. This ensures close contact with the inner surface 37 of the holder 32, and also minimizes the sliding resistance between the two when rotating the handle 35 relative to the holder 32. In the pot 35, a first
As shown in the figure, there are provided a cavity 10 that opens at the end surface of the base body 39 on the side where the lever 36 is provided, and a cavity section 102 that opens at the free end surface of the base body 39 on the side where the lever 36 is not provided. . Here, methacrylic resin {trade name: Delpet, manufactured by Asahi Kasei Industries, Ltd.} is used as the material for the holder 32, and polypropylene and styrene-based elastomer (trade name: Lavalon, manufactured by Mitsubishi Yuka Co., Ltd.) are used as the materials for the mating portion 40. ) made in a predetermined blending ratio (weight ratio),
The hardness of the rubbing part 40, the adhesion between the rubbing part 40 and the inner surface 37 of the holder 32, and the Kotoku 35 in the case of different compounding ratios.
The change in the inner diameter of the holder 32 when the holder 32 and the holder 32 were fitted together was measured. The hardness of the mating portion 40 was measured using a Shore C-type hardness tester. Regarding adhesion, as shown in FIG. 2, the first fluid port 31A and the first port 34A are
The second fluid port 31B and the second port 34B,
The third fluid port 31C and the third port 34 are connected to each other, and in this state, the second fluid port 31B and the third fluid port 31C are connected to each other.
while closing the first fluid port 31A.
The leakage was measured by applying air pressures of 0.4 Kg/cm 2 , 1.0 Kg/cm 2 , and 2.0 Kg/cm 2 . The measurement was performed five times for each air pressure, and a test was conducted to determine how many times out of the five times there was a leak. Furthermore, the change in the inner diameter of the holder 32 is determined by setting the inner diameter of the holder 32 to 5.98 mm before fitting the Kotoku 35, measuring the inner diameter of the holder 32 after fitting, and using the measurement results before fitting. The inner diameter of the holder 32 was compared with that of the holder 32 shown in FIG. In addition, the measurement is carried out by placing the pot 35 in the holder 3.
2 and heat it in an oven at 60℃ for 24 hours. The measurement results are shown in the table below. Measurement result
【表】
上記測定結果より、すり合わせ部４０の硬度が
小さく、材質を、弾性を有する軟質材とすること
が、ホルダ３２の内面３７との密着性を保持する
点で有効であることが認められる。すなわち、す
り合わせ部４０を軟質とすることにより、その弾
性変形によりホルダ３２の内径変化を少なくする
ことが可能となり、大きな圧力に対しても十分密
着性を保持することが認められる。ただし、すり
合わせ部４０をスチレン系エストラマーのみで形
成する時のように、すり合わせ部４０を極端に軟
質とする場合は、逆に大きな圧力に耐えられず、
漏れが生じて密着性が低下することとなる。
以上のことから、すり合わせ部４０は、シヨア
Ｃ硬度を空気圧1.0Kg／cm2では10〜50、空気圧2.0
Kg／cm2では20〜40とすることが最も密着性を保持
する点で有効であり、材質としてポリプロピレン
とスチレン系エラストマーの配合比を空気圧1.0
Kg／cm2では１：３、空気圧2.0Kg／cm2では１：４
程度とすることが最もよい結果を示すことが認め
られる。すり合わせ部４０は、ホルダ３２にコツ
ク３５を嵌合した際に弾性変形を生じ、ホルダ３
２に対するコツク３５の摺動抵抗を大きくするこ
となく、両者の密着性を保持することが可能とな
る。
また、医療用活栓１０は、0.5Kg／cm2の空気圧
力で漏れずに、かつ初期摺動抵抗が１Kg／cm以下
であるように、コツク３５の外径を6.20±0.01
mm、ホルダ３２の内径を5.98±0.01mmとするこ
と、すなわち、コツクの外径とホルダの内径との
差を0.2〜0.24mmとすることで、ホルダ３２に対
するコツク３５の摺動性を保持し、両者の密着性
を保持することが可能となる。
さらに、医療用活栓３０は、ホルダ３２および
コツク３５をガンマ線により滅菌処理させること
により、医療用として適切なものとすることが可
能となる。なお、ホルダ３２およびコツク３５を
ポリプロピレンとし、すり合わせ部をスチレン系
エラストマーとすることにより、耐ガンマ線性能
がよく、たとえ、ガンマ線に滅菌処理しても化学
的に安定なものとすることができる。
このように、医療用活栓３０は、コツク３５の
基体３９を比較的硬質な樹脂によつて形成するこ
とにより、コツク３５全体の剛性を保持し、コツ
ク３５の回転機能を確保することが可能となる。
これとともに、該基体３９のホルダ３２に対する
嵌合部分の全周部を、比較的軟質な弾性を有する
樹脂からなるすり合わせ部４０としたため、ホル
ダ３２とコツク３５の密着性を確実に保持させる
ことができる。これにより、従来のようにコツク
１５に対してホルダ１２のマイナス嵌合幅を大と
することなく、しかもコツク１５の浮き上り防止
のためにフアスナーピン１９やピン孔２０を設け
る必要もなく、簡易な構造により確実にホルダ３
２とコツク３５の密着性を保持させることが可能
となる。
なお、上記医療用活栓３０の場合、コツク３５
の先端部４１を縮径としているが、第１図に２点
鎖線Ｃで示すように先端部４１を拡開形状とし、
ホルダ３２に対するコツク３５の嵌合状態を確実
にするものとしてもよい。
第３図は、本発明の他の例に係る医療用活栓を
示す第２図同様の断面図である。第２図に示す医
療用活栓３０は、基体３９とすり合わせ部４０
を、相溶状態で一体に結合するようにしている。
これに対して第３図に示す医療用活栓５０は、基
体３９とすり合わせ部４０とを互いに相溶性のな
い樹脂により一体形成することとしている。すな
わち、基体３９とすり合わせ部４０のそれぞれの
材質に相溶性がない場合は、基体３９の外周部と
すり合わせ部４０の内周部にそれぞれ凹凸を設
け、これら凹凸を嵌合させる状態で基体３９とす
り合わせ部を二色成形により一体化するようにし
ている。
発明の具体的作用
第１図および第３図に示す医療用活栓３０およ
び５０は、例えば、第４図に示す尿採取装置５１
に適用することができる。医療用活栓３０は、導
尿チユーブ５２の中間部に第１の流体口ポート３
１Ａと第３の流体口ポート３１Ｃを接続する状態
で介装され、導尿チユーブ５２の一端にバルーン
カテーテル５３が接続され、導尿チユーブ５２の
他端には蓄尿バツク５４が接続されている。この
尿採取装置５１は、レバー３６の矢示Ｂ方向の回
転操作により第２の流体口ポート３１Ｂから尿を
採取可能としている。すなわち、この尿採取装置
５１は、導尿チユーブ５２から蓄尿バツク５４に
尿を流入させ、かつ第２の流体口ポート３１Ｂよ
り尿の採取を行う状態、導尿チユーブ５２を封止
させ、かつ第２の流体口ポート３１Ｂより蓄尿バ
ツク５４内の尿の採取を行う状態、蓄尿バツク５
４を封止させ、かつ第２の流体口ポート３１Ｂよ
り導尿チユーブ５２より流入される尿の採取を行
う状態、第２の流体口ポート３１Ｂを封止させ、
かつ導尿チユーブ５２から蓄尿バツク５４に尿を
流入させる状態を、それぞれレバー３６の切換に
よりそれぞれ選択することができる。尿採取装置
５１は、上記いずれの切換状態においても外部空
間との遮断が可能とされる。
発明の具体的効果
以上のように、本発明は、ホルダと、該ホルダ
の内径より大なる外径を備えて該ホルダに嵌合す
るコツクとからなる医療用活栓において、該コツ
クの基体を比較的硬質な樹脂によつて形成すると
ともに、該コツクの該ホルダに嵌合するすり合わ
せ部を比較的軟質な弾性を有する樹脂によつて形
成し、該基体の外周部に該すり合わせ部を二色成
形により一体に設け、該基体の該すり合わせ部が
設けられる部分の内部には該基体の端面に開口す
る空洞部を設けてあるようにしたので、コツクの
回転機能を損なうことなく、コツクとホルダの密
着性を簡易な構造により向上させることが可能と
なる。
また、本発明に係る医療用活栓は、前記すり合
わせ部をオレフイン系エラストマー又はそれを配
合したため、コツクの回転機能を損なうことな
く、コツクとホルダの密着性をより向上すること
が可能となる。
また、本発明に係る医療用活栓は、前記すり合
わせ部をスチレン系エラストマー又はそれを配合
したため、コツクの回転機能を損なうことなく、
コツクとホルダの密着性をより向上することが可
能となる。
また、本発明に係る医療用活栓は、前記すり合
わせ部のシヨアＣ硬度を20〜40としたため、コツ
クの回転機能を損なうことなく、コツクとホルダ
の密着性をより向上することが可能となる。
また、本発明に係る医療用活栓は、ホルダとコ
ツクの嵌合面が0.5Kg／cm2の空気圧力で漏れずに、
かつ初期摺動抵抗が1.0Kg／cm以下としたため、
コツクの回転機能を損なうことなく、コツクとホ
ルダの密着性をより向上することが可能となる。
そしてコツクの外径とホルダの内径との差が0.2
〜0.24mmであるのが効果が著しい。
また、本発明に係る医療用活栓は、ホルダおよ
びコツクをポリプロピレンとし、すり合わせ部を
スチレン系エラストマーとしたため、耐ガンマ線
性能がよく、ガンマ線により滅菌処理しても化学
的に安定で、医療用として安全度の高いものとす
ることが可能となる。[Table] From the above measurement results, it is recognized that using a soft material with low hardness and elasticity for the mating portion 40 is effective in maintaining adhesion with the inner surface 37 of the holder 32. . That is, by making the fitting part 40 soft, it is possible to reduce changes in the inner diameter of the holder 32 due to its elastic deformation, and it is recognized that sufficient adhesion can be maintained even under large pressure. However, if the mating part 40 is made extremely soft, such as when the mating part 40 is made only of styrene-based elastomer, it will not be able to withstand large pressure.
Leakage will occur and the adhesion will deteriorate. From the above, the sliding part 40 has a shore C hardness of 10 to 50 at an air pressure of 1.0 kg/cm 2 and a hardness of 10 to 50 at an air pressure of 2.0.
Kg/cm 2 is 20 to 40, which is most effective in terms of maintaining adhesion, and the blending ratio of polypropylene and styrene elastomer as materials is set to 1.0 at an air pressure.
1:3 for Kg/cm 2 , 1:4 for air pressure 2.0Kg/cm 2
It is recognized that the best results are obtained by setting the temperature at a certain level. The sliding portion 40 is elastically deformed when the holder 32 is fitted with the holder 35, and the holder 3
It becomes possible to maintain the adhesion between the two without increasing the sliding resistance of the pot 35 with respect to the two. In addition, the medical stopcock 10 has an outer diameter of 6.20±0.01 so that it does not leak under an air pressure of 0.5 Kg/cm 2 and has an initial sliding resistance of 1 Kg/cm or less.
By setting the inner diameter of the holder 32 to 5.98±0.01 mm, that is, by setting the difference between the outer diameter of the holder and the inner diameter of the holder to 0.2 to 0.24 mm, the slidability of the holder 35 with respect to the holder 32 is maintained. , it becomes possible to maintain adhesion between the two. Further, the medical stopcock 30 can be made suitable for medical use by sterilizing the holder 32 and the stopper 35 with gamma rays. Note that by making the holder 32 and the handle 35 of polypropylene and the mating part of a styrene elastomer, the gamma ray resistance is good and the product can be chemically stable even after being sterilized by gamma rays. In this manner, in the medical stopcock 30, by forming the base body 39 of the stopcock 35 from a relatively hard resin, it is possible to maintain the rigidity of the stopcock 35 as a whole and ensure the rotation function of the stopcock 35. Become.
In addition, since the entire periphery of the fitting portion of the base 39 to the holder 32 is made of a rubbing portion 40 made of a relatively soft elastic resin, it is possible to reliably maintain the adhesion between the holder 32 and the pot 35. can. This eliminates the need to increase the negative fitting width of the holder 12 with respect to the lock 15 as in the past, and also eliminates the need to provide fastener pins 19 and pin holes 20 to prevent the lock 15 from lifting up. The structure ensures that the holder 3
It becomes possible to maintain the close contact between 2 and the pot 35. In addition, in the case of the above medical stopcock 30, Kotoku 35
The diameter of the tip 41 is reduced, but the tip 41 is expanded as shown by the two-dot chain line C in FIG.
It is also possible to ensure that the fitting 35 is securely fitted to the holder 32. FIG. 3 is a sectional view similar to FIG. 2 showing a medical stopcock according to another example of the present invention. The medical stopcock 30 shown in FIG.
are bound together in a compatible state.
On the other hand, in the medical stopcock 50 shown in FIG. 3, the base body 39 and the abutment part 40 are integrally formed of resins that are incompatible with each other. That is, if the materials of the base 39 and the mating part 40 are not compatible, the outer periphery of the base 39 and the inner periphery of the mating part 40 are provided with irregularities, respectively, and the base 39 is fitted with the irregularities. The mating parts are integrated by two-color molding. Specific Effects of the Invention The medical stopcocks 30 and 50 shown in FIGS. 1 and 3 can be used, for example, in the urine collection device 51 shown in FIG.
It can be applied to The medical stopcock 30 is connected to the first fluid port 3 in the middle of the urine drainage tube 52.
1A and the third fluid port 31C, a balloon catheter 53 is connected to one end of the urine drainage tube 52, and a urine storage bag 54 is connected to the other end of the urine drainage tube 52. This urine collection device 51 allows urine to be collected from the second fluid port 31B by rotating the lever 36 in the direction of arrow B. That is, this urine collection device 51 is in a state where urine flows from the urine drainage tube 52 into the urine storage bag 54 and urine is collected from the second fluid port 31B, and when the urine drainage tube 52 is sealed and the urine is collected from the second fluid port 31B. A state in which urine is collected from the urine storage bag 54 from the fluid port 31B of 2, the urine storage bag 5
4 is sealed, and urine flowing in from the urine drainage tube 52 is collected from the second fluid port 31B, the second fluid port 31B is sealed,
In addition, the state in which urine flows from the urine drainage tube 52 to the urine storage bag 54 can be selected by switching the lever 36. The urine collection device 51 can be isolated from the external space in any of the above switching states. Specific Effects of the Invention As described above, the present invention provides a medical stopcock consisting of a holder and a stop that has an outer diameter larger than the inner diameter of the holder and fits into the holder, and compares the base of the stopcock. At the same time, the mating part of the cot that fits into the holder is made of a relatively soft and elastic resin, and the mating part is two-color molded on the outer periphery of the base. Since the part of the base body where the sliding part is provided has a cavity that opens at the end face of the base body, the rotation function of the base body is not impaired, and the rotation function of the base body is not impaired. Adhesion can be improved with a simple structure. In addition, in the medical stopcock according to the present invention, since the abutment portion is made of an olefin elastomer or blended with it, it is possible to further improve the adhesion between the stopcock and the holder without impairing the rotating function of the stopcock. In addition, in the medical stopcock according to the present invention, since the abutment portion is made of styrene elastomer or blended with it, the stopcock can be used without impairing the rotation function of the stopcock
It becomes possible to further improve the adhesion between the pot and the holder. Furthermore, in the medical stopcock according to the present invention, the Shore C hardness of the abutting portion is set to 20 to 40, so that it is possible to further improve the adhesion between the stopcock and the holder without impairing the rotating function of the stopcock. In addition, the medical stopcock according to the present invention has an air pressure of 0.5 kg/cm 2 that prevents leakage on the fitting surface of the holder and the stopcock.
And because the initial sliding resistance was 1.0Kg/cm or less,
It becomes possible to further improve the adhesion between the pot and the holder without impairing the rotation function of the pot.
And the difference between the outer diameter of the pot and the inner diameter of the holder is 0.2
The effect is remarkable when it is ~0.24mm. In addition, the medical stopcock according to the present invention has good gamma ray resistance because the holder and stopper are made of polypropylene, and the fitting part is made of styrene-based elastomer, and is chemically stable even when sterilized with gamma rays, making it safe for medical use. It becomes possible to make it highly accurate.
第１図は、本発明の一実施例に係る医療用活栓
を示す一部破断の正面図、第２図は第１図の−
線に沿う断面図、第３図は本発明の他の例に係
る医療用活栓を示す第２図同様の断面図、第４図
は医療用活栓を尿採取装置に適用した状態を示す
正面図、第５図は従来例に係る医療用活栓を示す
一部破断の正面図、第６図は第５図の−線に
沿う断面図である。
１０，３０，５０……医療用活栓、１２，３２
……ホルダ、１５，３５……コツク、３９……基
体、４０……すり合わせ部、１０１，１０２……
空洞部。
FIG. 1 is a partially cutaway front view showing a medical stopcock according to an embodiment of the present invention, and FIG. 2 is a -
3 is a sectional view similar to FIG. 2 showing a medical stopcock according to another example of the present invention; FIG. 4 is a front view showing the medical stopcock applied to a urine collection device. , FIG. 5 is a partially cutaway front view showing a conventional medical stopcock, and FIG. 6 is a sectional view taken along the - line in FIG. 5. 10,30,50...Medical stopcock, 12,32
...Holder, 15, 35...Kotoku, 39...Base, 40...Grinning part, 101,102...
cavity.
Claims (1)
備えて該ホルダに嵌合するコツクとからなる医療
用活栓において、該コツクの基体を比較的硬質な
樹脂によつて形成するとともに、該コツクの該ホ
ルダに嵌合するすり合わせ部を比較的軟質な弾性
を有する樹脂によつて形成し、該基体の外周部に
該すり合わせ部を二色成形により一体に設け、該
基体の該すり合わせ部が設けられる部分の内部に
は該基体の端面に開口する空洞部を設けてあるこ
とを特徴とする医療用活栓。 ２ 前記すり合わせ部は、オレフイン系エラスト
マー又はそれを配合したことを特徴とする特許請
求の範囲第１項に記載の医療用活栓。 ３ 前記すり合わせ部は、スチレン系エラストマ
ー又はそれを配合したことを特徴とする特許請求
の範囲第１項に記載の医療用活栓。 ４ 前記すり合わせ部のシヨアＣ硬度が、20〜40
である特許請求の範囲の第１項記載の医療用活
栓。 ５ ホルダとコツクの嵌合面が0.5Kg／cm2の空気
圧力で漏れずに、かつ初期摺動抵抗が1.0Kg／cm
以下である特許請求の範囲第１項記載の医療用活
栓。 ６ コツクの外径とホルダの内径との差が0.2〜
0.24mmである特許請求の範囲第５項記載の医療用
活栓。 ７ ホルダおよびコツクは、ガンマ線により滅菌
処理されてなる特許請求の範囲第１項記載の医療
用活栓。[Claims] 1. A medical stopcock consisting of a holder and a stop that has an outer diameter larger than the inner diameter of the holder and fits into the holder, in which the base of the stop is made of a relatively hard resin. At the same time, a mating part that fits into the holder of the Kotoku is formed of a relatively soft and elastic resin, and the mating part is integrally provided on the outer periphery of the base by two-color molding. A medical stopcock, characterized in that a hollow portion opening to an end face of the base body is provided inside the portion where the fitting portion is provided. 2. The medical stopcock according to claim 1, wherein the rubbing portion is made of an olefin-based elastomer or is blended with an olefin-based elastomer. 3. The medical stopcock according to claim 1, wherein the rubbing portion is made of a styrene elastomer or a mixture thereof. 4 Shore C hardness of the rubbing part is 20 to 40
A medical stopcock according to claim 1. 5 The mating surface of the holder and the lock does not leak under air pressure of 0.5Kg/ cm2 , and the initial sliding resistance is 1.0Kg/cm2.
A medical stopcock according to claim 1, which is as follows. 6 The difference between the outer diameter of the pot and the inner diameter of the holder is 0.2~
The medical stopcock according to claim 5, which has a diameter of 0.24 mm. 7. The medical stopcock according to claim 1, wherein the holder and the stopcock are sterilized by gamma rays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59188119A JPS6168045A (en) | 1984-09-10 | 1984-09-10 | Medical stopcock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59188119A JPS6168045A (en) | 1984-09-10 | 1984-09-10 | Medical stopcock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6168045A JPS6168045A (en) | 1986-04-08 |
| JPH0362426B2 true JPH0362426B2 (en) | 1991-09-25 |
Family
ID=16218038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59188119A Granted JPS6168045A (en) | 1984-09-10 | 1984-09-10 | Medical stopcock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6168045A (en) |
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- 1984-09-10 JP JP59188119A patent/JPS6168045A/en active Granted
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Also Published As
| Publication number | Publication date |
|---|---|
| JPS6168045A (en) | 1986-04-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |