JP2004344547A

JP2004344547A - Coupling device

Info

Publication number: JP2004344547A
Application number: JP2003147225A
Authority: JP
Inventors: Hiroto Suzuki; 博人鈴木
Original assignee: Top KK
Current assignee: Top KK
Priority date: 2003-05-26
Filing date: 2003-05-26
Publication date: 2004-12-09
Anticipated expiration: 2023-05-26
Also published as: JP4068504B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coupling device capable of not only forming a sure communication state in connecting a cylindrical connection end part provided on the tip of a syringe or a tube, etc., but also preventing a flow rate from becoming excessive inside a tube body. <P>SOLUTION: Along the axial center of an outer cylinder 9, the tube body 5 is provided. A closing member 12 for closing the outer cylinder 9 and the tube body 5 is provided and the closing member 12 is provided with a closing hole 19 to which the tube body 5 is to be inserted. An energizing means 13 for energizing the closing member 12 in an advancing direction is provided. The tube body 5 is provided with a plurality of communication holes 6 communicated to the outer part of the bottom part 3 of the outer cylinder 9 at a rear end and opened at the tip. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、継ぎ手装置に関し、詳しくは、例えば、点滴の薬液流路に設けてシリンジやチューブ等を接続する継ぎ手装置に関する。
【０００２】
【従来の技術】
従来、この種の継ぎ手装置は、円筒状の外筒内部に延設された中空の管体と、外筒内部において該管体に外挿されて進退方向に摺動自在の筒状部材とを備えている（例えば、特許文献１参照）。
【０００３】
前記管体は、その先端近傍の周壁に開口する側孔が形成されており、前記筒状部材は、細管の先端部に位置するとき側孔を閉塞する。これにより、外筒の先端にシリンジのルアーテーパ部を挿着したとき、該ルアーテーパ部の先端に押圧された筒状部材が後退し、ルアーテーパ部が管体に外挿状態となって管体の側孔が開放されることで導通状態となる。また、外筒内部にはコイルスプリングが設けられており、該コイルスプリングによって後退時の筒状部材を前進方向に付勢する。これにより、外筒の先端から前記ルアーテーパ部を抜き取った際に、該コイルスプリングの付勢により筒状部材が前進し、管体の側孔が閉塞される。
【０００４】
ところで、この種の継ぎ手装置は、点滴の薬液流路に設けられるが、薬液流路に別の薬液を混入させるために例えばシリンジがそのルアーテーパ部を介して接続される。そして、シリンジのピストンを押圧操作して薬液流路に別の薬液が注入されるが、管体内への薬液の残留が多く、点滴の薬液流路に所望の量の薬液が流入されない不都合がある。
【０００５】
また、このときピストンの押圧操作を急激に行なうと、薬液の流量を適量に制限するものが何もないので、薬液流路の流量が一時的に過剰となり、点滴の薬液流路の流量が適量に維持できず、円滑な輸液に支障がでるおそれがある。
【０００６】
【特許文献１】
特開平１０−１５０７９号公報
【０００７】
【発明が解決しようとする課題】
かかる不都合を解消して、本発明は、シリンジやチューブ等の先端に設けられた筒状の接続端部を接続した際に確実な連通状態を形成することができるだけでなく、管体内への薬液の残量を小とし、また、管体内の流量が過剰となることを防止することができる継ぎ手装置を提供することを目的とする。
【０００８】
【課題を解決するための手段】
かかる目的を達成するために、本発明は、管状の被接続物を挿入して接続可能に開口する接続部を先端に備える有底円筒状の外筒と、該外筒の軸心に沿って延設され、後端が外筒の底部外方に連通して先端が開口する管体と、前記外筒にその軸線方向に進退自在に収納されて前進位置において該外筒及び前記管体を閉塞する弾性材料による閉塞部材と、該閉塞部材における前記管体の先端に対向する位置に、該閉塞部材の後退に伴う前記管体の挿通により弾発的に開口し該管体が非挿通時には復元弾性により閉鎖状態となる閉鎖孔と、該閉塞部材を前進方向に付勢する付勢手段とを備える継ぎ手装置において、前記管体は、棒状の本体と、該本体の後端において外筒の底部外方に連通し、該本体の先端において開口する複数の連通孔とを備えることを特徴とする。
【０００９】
本発明の継ぎ手装置は、例えばシリンジやチューブに備えるルアーテーパ部等の被接続物を外筒の接続部に挿入したとき、前記閉塞部材が押圧されて後退される。これに伴い、前記管体が前記閉鎖孔に挿通される。これによって、該管体の先端の開口部の閉塞が解除され、シリンジやチューブ等に連通する。そして、被接続物を前記外筒の接続部から抜き取った場合には、前記付勢手段の付勢力によって閉塞部材が前進される。これにより、閉塞部材の閉鎖孔から管体が抜け、閉塞部材が外筒を閉塞する。
【００１０】
本発明の継ぎ手装置においては、前記管体が前記複数の連通孔を備えている。これによって、該管体内部（各連通孔の内部）に残留する薬液等の量を少量とすることができ、シリンジ等を接続して管体の内部へ注入された薬液の減少を小とすることができる。
【００１１】
また、前記複数の連通孔によって、管体を流動する薬液等の流量が過剰となることが防止できる。即ち、例えば、本発明の継ぎ手装置が点滴等の輸液流路に設けられているとき、シリンジ等を本発明の継ぎ手装置に接続して別の薬液を輸液流路に注入する場合に、シリンジのピストンの押圧操作が急激に行なわれても、輸液流路への急激な薬液の流入を確実に防止でき、輸液流路への他の薬液の適量注入を極めて容易に行なうことができる。
【００１２】
なお、管体内部の薬液残留量を小とし、且つその流量を制限するために、例えば、管体を比較的細く形成することが考えられるが、管体を細く形成することによって管体の強度が低下するため、閉鎖孔への挿通時に曲がりや折れが生じるおそれがある。また、管体の外径を変更せずに、内部の流路の内径を小とすることで肉厚の管体を採用することも考えられるが、流量の異なる管体を複数製造する場合には、流量に応じて流路の内径の大小を定めなければならず、内径の管理が煩わしい。そこで、本発明は、複数の連通孔を設けることによって管体内の流量を制限するので、管体の強度低下を防止することができ、また、流量の異なる管体を複数製造する場合には、流量に応じて連通孔の数を増減させればよく、流量の異なる管体の製造が容易となる。
【００１３】
また、本発明において、前記閉塞部材は、前記閉鎖孔を備えて前記外筒の接続部に挿脱自在に嵌合する栓部と、該栓部の後端に連設されて前記管体の周壁に液密に密着する円筒状の管体密着部とを備え、該管体密着部の外周に、該管体密着部を前記管体に圧接する環状の圧接部材を設けたことを特徴とする。
【００１４】
本発明の継ぎ手装置においては、前記管体に複数の連通孔を設けることで薬液等の流量を制限している。このため、シリンジや他の輸液チューブからの流量と管体内部の流量との差が大きいと、管体の先端近傍の液圧が上昇し、管体と管体密着部との間に薬液等が侵入して液漏れが生じるおそれがある。そこで、本発明は、圧接部材を設けて密着度を増加させたので、管体と管体密着部との間への薬液等の侵入を確実に防止することができる。
【００１５】
また、本発明において、前記管体は、その外径が後端に向かって次第に拡径するテーパ状に形成されていることを特徴とする。前記閉塞部材が管体に沿って後退したとき、管体の後端側が拡径されていることによって管体密着部による管体への圧接力を増加させることができる。これにより、管体と管体密着部とが確実に密着して管体と管体密着部との間への薬液等の侵入を確実に防止することができる。
【００１６】
【発明の実施の形態】
本発明の一実施形態を図面に基づいて説明する。図１は本実施形態の継ぎ手装置を示す説明的断面図、図２は管体の断面説明図、図３は閉塞部材の栓部の説明的正面図、図４は他の閉塞部材の栓部の説明的正面図、図５は図１の継ぎ手装置の接続状態を示す説明的断面図、図６は他の実施形態の継ぎ手装置を示す説明的断面図、図７は図６の継ぎ手装置の接続状態を示す説明的断面図である。
【００１７】
本実施形態の継ぎ手装置１は、図１に示すように、３方活栓２の一つのポート３に設けられている。該ポート３には筒状の管体支持部４を介して硬質合成樹脂（例えばポリアセタール）によって形成された棒状の管体５が挿着されている。該管体５は、図１及び図２に示すように、中実の本体を軸線方向に沿って貫通して形成された複数の連通孔６を備えている。各連通孔６は、管体５の基端から前記ポート３内に連通されており、該管体５の先端において、その軸線方向に向って開口する開口部７が形成されている。
【００１８】
また、図１に示すように、前記管体支持部４の外周には、円筒状の外筒支持部８を介して外筒９が連結支持されている。該外筒９の先端には、図示しないシリンジやチューブの先端に設けられた円筒状の接続端部１０（図５参照）を挿着する挿着部１１が形成されている。
【００１９】
該外筒８の内部には、図１に示すように、ゴム製の閉塞部材１２が収納されている。該閉塞部材１２は、管体５に沿って進退自在に設けられ、外筒８内部に設けられた付勢手段としてのコイルスプリング１３によって、前進方向に付勢されている。該閉塞部材１２は、その外周に装着された後述する圧接部材１４のフランジ部１５が、外筒８の挿着部１１の内周に突設された規制凸部１６に突き当って抜け止めされている。
【００２０】
該閉塞部材１２は、図１に示すように、管体５の先端側を閉塞する栓部１７と、該栓部１７の後方に連設されて管体５の外周に密着する円筒状の管体密着部１８とによって構成されている。該閉塞部材１２の栓部１７には、図３に示すように、管体５が挿通される挿通孔１９が形成されている。該挿通孔１９は、管体５の挿通により弾発的に開口し該管体５が非挿通時には復元弾性により閉鎖状態となる閉鎖孔である。挿通孔１９は更に挿着部１１に嵌合されることで挿着部１１から押圧を受け、確実な閉鎖状態を維持する。なお、該挿通孔１９については、それ以外に例えば、図４に示すように、スリット２０を採用してもよい。該スリット２０としても、前記挿通孔１９と同様に、管体５の挿通により弾発的に開口し該管体５が非挿通時には復元弾性により閉鎖状態となる。
【００２１】
また、図１に示すように、前記管体密着部１８の外周には、金属製の圧接部材１４が装着されている。圧接部材１４は、管体密着部１８の外周全周を締め付けており、管体密着部１８を管体５に押し当てて密着させている。更に、圧接部材１４には、栓部１７側において鍔状に張り出すフランジ部１５が形成されている。該フランジ部１５は、前記コイルスプリング１３のスプリングシートとしてゴム製の閉塞部材１２との接触による閉塞部材１２の損傷を防止して確実に付勢力を付与し、且つ、前述したように外筒８の挿着部１１の内周に突設された規制凸部１６に突き当って閉塞部材１２の抜け出しを防止する。該圧接部材１４によって、管体密着部１８と管体５との液密状態が維持され、閉塞部材１２の進退移動時の液漏れを確実に防止することができる。
【００２２】
以上の構成からなる継ぎ手装置１によれば、図５に示すように、前記外筒８の挿着部１１に図示しないシリンジやチューブの先端に設けられた接続端部１０を挿着したとき、該接続端部１０に押圧された閉塞部材１２が後退して、挿通孔１９を貫通した管体５の各連通孔６の開口部７が開放され、接続端部１０と３方活栓２のポート３とが管体５を介して連通する。
【００２３】
このとき、接続端部１０から管体５に向かって薬液が注入されると、管体５が各連通孔６を備えて薬液の流量が制限されることによって、薬液が３方活栓２内に急激に注入されることが防止される。また、薬液の流量が管体５により制限されると、管体５の周囲の液圧が上昇し、閉塞部材１２と管体５との間に薬液が侵入しようとするが、該閉塞部材１２の管体密着部１８が前記圧接部材１４により管体５に圧接されていることにより、管体密着部１８と管体５との間への薬液の侵入が防止される。
【００２４】
その後、前記外筒８の挿着部１１から接続端部１０を引き抜いたときには、コイルスプリング１３の付勢力によって閉塞部材１２が前進し、管体５が挿通孔１９から抜けた時点で、該管体５の各連通孔６の開口部７が閉塞される。
【００２５】
次に、本発明の他の実施形態を説明する。図６及び図７に示すように、他の実施形態の継ぎ手装置２１は、前述した実施形態と同様に、３方活栓２の一つのポート３に設けられているが、前述した実施形態の管体５とは異なる形状の管体２２を備えている。また、前述した実施形態と同様の構成については、図６及び図７において、図１及び図５と同一の符号を付してその説明を省略する。
【００２６】
他の実施形態の継ぎ手装置２１に設けられた管体２２は、図６及び図７に示すように、硬質合成樹脂（例えばポリアセタール）によって形成されており、内部に複数の連通孔２３が形成されている。各連通孔２３は、管体２２の後端から筒状の管体支持部４内に連通されており、該管体２２の先端において、その軸線方向に向って開口する開口部２４が形成されている。
【００２７】
該管体２２は、その外径が後端に向かって次第に拡径するテーパ状に形成されている。該管体２２の後端部には、鍔状に張り出して円筒状の外筒支持部８の端縁に当接された鍔部２５が形成されている。該鍔部２５の後方には、外筒支持部８と管体支持部４との間に介挿して固定する固定脚部２６が一体に連設されている。該鍔部２５は、コイルスプリング１３の後端に当接するスプリングシートとされ、コイルスプリング１３と外筒支持部８との接触による外筒支持部８の損傷を防止する。
【００２８】
このように構成された管体５は、拡径された後端により曲げ強度が向上され、挿通孔１９への管体２２の挿通時に管体２２の折れ曲がり等を確実に防止することができる。
【００２９】
また、図７に示すように、前記外筒８の挿着部１１に図示しないシリンジやチューブの先端に設けられた接続端部１０を挿着したとき、該接続端部１０に押圧された閉塞部材１２が後退すると、該閉塞部材１２の管体密着部１８が管体２２の拡径された部分に圧着され、管体密着部１８と管体２２との密着度合いを向上させることができる。これにより、接続端部１０から管体２２に向かって注入された薬液の流量が、管体２２の各連通孔２３により制限されて管体５の周囲の液圧が上昇しても、管体密着部１８と管体２２との間への薬液の侵入を一層確実に防止することができる。
【図面の簡単な説明】
【図１】本発明の一実施形態の継ぎ手装置を示す説明的断面図。
【図２】管体の断面説明図。
【図３】閉塞部材の栓部の説明的正面図。
【図４】他の閉塞部材の栓部の説明的正面図。
【図５】図１の継ぎ手装置の接続状態を示す説明的断面図。
【図６】他の実施形態の継ぎ手装置を示す説明的断面図。
【図７】図６の継ぎ手装置の接続状態を示す説明的断面図。
【符号の説明】
１，２１…継ぎ手装置、５，２２…管体、６，２３…連通孔、９…外筒、１０…接続端部（被接続物）、１１…接続部、１２…閉塞部材、１３…コイルスプリング（付勢手段）、１４…圧接部材、１７…栓部、１８…管体密着部、１９…挿通孔（閉鎖孔）、２０…スリット（閉鎖孔）。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint device, and more particularly, to a joint device that is provided in, for example, an infusion chemical liquid flow path and connects a syringe, a tube, or the like.
[0002]
[Prior art]
Conventionally, this type of joint device includes a hollow tube extending inside a cylindrical outer cylinder, and a cylindrical member that is externally inserted into the tube and slidable in the advancing and retracting direction. (For example, refer to Patent Document 1).
[0003]
The tubular body has a side hole that opens in a peripheral wall in the vicinity of the distal end thereof, and the tubular member closes the side hole when positioned at the distal end portion of the thin tube. As a result, when the luer taper portion of the syringe is inserted into the distal end of the outer cylinder, the cylindrical member pressed against the distal end of the luer taper portion is retracted, and the luer taper portion is in an extrapolated state to the tubular body. When the hole is opened, the conductive state is established. In addition, a coil spring is provided inside the outer cylinder, and the cylindrical member is urged forward by the coil spring in the forward direction. Thereby, when the said luer taper part is extracted from the front-end | tip of an outer cylinder, a cylindrical member advances by the urging | biasing of this coil spring, and the side hole of a tubular body is obstruct | occluded.
[0004]
By the way, this kind of joint device is provided in the chemical solution flow path of the drip, but a syringe is connected via the luer taper portion in order to mix another chemical solution into the chemical solution flow path. Then, another chemical solution is injected into the chemical flow channel by pressing the piston of the syringe, but there is a problem that a large amount of the chemical solution remains in the tube and a desired amount of the chemical solution does not flow into the drip chemical flow channel. .
[0005]
In addition, if the piston is pressed rapidly at this time, there is nothing that limits the flow rate of the chemical solution to an appropriate amount, so the flow rate of the chemical solution channel temporarily becomes excessive, and the flow rate of the infusion chemical solution channel is appropriate. May not be able to be maintained, and smooth infusion may be hindered.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-15079
[Problems to be solved by the invention]
In order to eliminate such inconvenience, the present invention can not only form a reliable communication state when connecting a cylindrical connection end provided at the tip of a syringe, tube or the like, but also a chemical solution into the tube. It is an object of the present invention to provide a joint device that can reduce the remaining amount of water and prevent the flow rate in the tube from becoming excessive.
[0008]
[Means for Solving the Problems]
In order to achieve such an object, the present invention provides a cylindrical outer cylinder having a bottom provided with a connecting portion that opens so as to be connectable by inserting a tubular connection object, and an axial center of the outer cylinder. A tube body that extends and has a rear end communicating with the outside of the bottom of the outer cylinder and having an opening at the front end; and the outer cylinder is housed in the outer cylinder so as to be movable forward and backward in its axial direction. A closing member made of an elastic material that closes, and a position that opposes the tip of the tubular body in the closing member, is opened elastically by the insertion of the tubular body as the closing member retreats, and when the tubular body is not inserted. In a joint device including a closing hole that is closed by restoring elasticity and an urging means that urges the closing member in a forward direction, the tubular body includes a rod-shaped main body and an outer cylinder at a rear end of the main body. A plurality of communication holes that communicate with the outside of the bottom and open at the tip of the main body. It is characterized in.
[0009]
In the joint device according to the present invention, for example, when an object to be connected such as a luer taper provided in a syringe or a tube is inserted into the connecting portion of the outer cylinder, the closing member is pressed and retracted. Accordingly, the tubular body is inserted through the closing hole. As a result, the blocking of the opening at the tip of the tube body is released, and the tube body communicates with a syringe or a tube. And when a to-be-connected thing is extracted from the connection part of the said outer cylinder, a closure member is advanced by the urging | biasing force of the said urging | biasing means. As a result, the tubular body comes out of the closing hole of the closing member, and the closing member closes the outer cylinder.
[0010]
In the joint device of the present invention, the pipe body includes the plurality of communication holes. As a result, the amount of the chemical solution remaining in the tube body (inside each communication hole) can be reduced, and the decrease in the chemical solution injected into the tube body by connecting a syringe or the like is reduced. be able to.
[0011]
In addition, the plurality of communication holes can prevent an excessive flow rate of a chemical solution or the like flowing through the tube body. That is, for example, when the joint device of the present invention is provided in an infusion channel such as an infusion, when a syringe or the like is connected to the joint device of the present invention and another chemical solution is injected into the infusion channel, Even if the pressing operation of the piston is abruptly performed, it is possible to reliably prevent a sudden inflow of the chemical liquid into the infusion channel, and it is possible to very easily inject an appropriate amount of another medicinal solution into the infusion channel.
[0012]
In order to reduce the amount of chemical solution remaining inside the tube and limit the flow rate, for example, it is conceivable to form the tube relatively thin. However, by forming the tube thin, the strength of the tube Therefore, there is a possibility that bending or bending may occur when the lens is inserted into the closing hole. In addition, it is conceivable to adopt a thick tube by reducing the inner diameter of the internal flow path without changing the outer diameter of the tube, but when manufacturing a plurality of tubes having different flow rates. The size of the inner diameter of the flow path must be determined according to the flow rate, and the management of the inner diameter is troublesome. Therefore, the present invention restricts the flow rate in the pipe body by providing a plurality of communication holes, so it is possible to prevent the strength of the pipe body from being reduced, and when manufacturing a plurality of pipe bodies having different flow rates, What is necessary is just to increase / decrease the number of communicating holes according to flow volume, and manufacture of the pipe body from which flow volume differs is easy.
[0013]
Further, in the present invention, the closing member includes a plug portion that includes the closing hole and is detachably fitted to a connection portion of the outer cylinder, and is connected to a rear end of the plug portion so as to be connected to the tube body. A cylindrical tube contact portion that is liquid-tightly attached to the peripheral wall, and an annular pressure contact member that presses the tube contact portion against the tube is provided on the outer periphery of the tube contact portion. To do.
[0014]
In the joint device of the present invention, the flow rate of the chemical solution or the like is limited by providing a plurality of communication holes in the pipe body. For this reason, if the difference between the flow rate from the syringe or other infusion tube and the flow rate inside the tube body is large, the fluid pressure near the tip of the tube body rises, and a chemical solution or the like is placed between the tube body and the tube contact portion. May enter and liquid leakage may occur. Therefore, in the present invention, since the pressure contact member is provided to increase the degree of adhesion, it is possible to reliably prevent the penetration of a chemical solution or the like between the tube body and the tube body contact portion.
[0015]
In the present invention, the tubular body is formed in a tapered shape whose outer diameter gradually increases toward the rear end. When the closing member is retracted along the tubular body, the diameter of the rear end side of the tubular body is increased, so that the pressure contact force on the tubular body by the tubular body contact portion can be increased. As a result, the tube body and the tube body contact portion can be surely adhered to each other, and the penetration of a chemical solution or the like between the tube body and the tube body contact portion can be reliably prevented.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory cross-sectional view showing a joint device of the present embodiment, FIG. 2 is an explanatory cross-sectional view of a tube, FIG. 3 is an explanatory front view of a plug portion of a closing member, and FIG. 4 is a plug portion of another closing member. FIG. 5 is an explanatory cross-sectional view showing a connection state of the joint device of FIG. 1, FIG. 6 is an explanatory cross-sectional view showing a joint device of another embodiment, and FIG. 7 is an illustration of the joint device of FIG. It is explanatory sectional drawing which shows a connection state.
[0017]
The joint device 1 of this embodiment is provided in one port 3 of the three-way cock 2 as shown in FIG. A rod-like tube 5 made of hard synthetic resin (for example, polyacetal) is inserted into the port 3 through a tubular tube support 4. As shown in FIGS. 1 and 2, the tubular body 5 includes a plurality of communication holes 6 formed so as to penetrate a solid main body along the axial direction. Each communication hole 6 communicates with the inside of the port 3 from the proximal end of the tubular body 5, and an opening 7 is formed at the distal end of the tubular body 5 that opens in the axial direction.
[0018]
Further, as shown in FIG. 1, an outer cylinder 9 is connected and supported on the outer periphery of the tube support part 4 via a cylindrical outer cylinder support part 8. An insertion portion 11 for inserting a cylindrical connection end portion 10 (see FIG. 5) provided at the distal end of a syringe or tube (not shown) is formed at the distal end of the outer cylinder 9.
[0019]
As shown in FIG. 1, a rubber closing member 12 is accommodated in the outer cylinder 8. The closing member 12 is provided so as to be able to advance and retract along the tube body 5 and is urged in the forward direction by a coil spring 13 as an urging means provided in the outer cylinder 8. The closing member 12 is prevented from coming off by a flange portion 15 of a pressure contact member 14, which will be described later, mounted on the outer periphery of the closing member 12 abutting against a regulating convex portion 16 protruding from the inner periphery of the insertion portion 11 of the outer cylinder 8. ing.
[0020]
As shown in FIG. 1, the closing member 12 includes a plug portion 17 that closes the distal end side of the tube body 5, and a cylindrical tube that is connected to the rear of the plug portion 17 and closely contacts the outer periphery of the tube body 5. It is comprised by the body contact | adherence part 18. FIG. As shown in FIG. 3, an insertion hole 19 through which the tubular body 5 is inserted is formed in the plug portion 17 of the closing member 12. The insertion hole 19 is a closed hole that opens elastically when the tubular body 5 is inserted and is closed by restoring elasticity when the tubular body 5 is not inserted. The insertion hole 19 is further fitted into the insertion portion 11 to receive pressure from the insertion portion 11 and maintain a reliable closed state. For the insertion hole 19, for example, a slit 20 may be employed as shown in FIG. Similarly to the insertion hole 19, the slit 20 is opened elastically by insertion of the tube body 5, and is closed by restoring elasticity when the tube body 5 is not inserted.
[0021]
Further, as shown in FIG. 1, a metal pressure contact member 14 is attached to the outer periphery of the tubular body contact portion 18. The pressure contact member 14 tightens the entire outer periphery of the tubular body contact portion 18 and presses the tubular body contact portion 18 against the tubular body 5 so as to be in close contact therewith. Further, the pressure contact member 14 is formed with a flange portion 15 that protrudes like a bowl on the side of the plug portion 17. The flange portion 15 serves as a spring seat of the coil spring 13 to prevent damage to the closing member 12 due to contact with the rubber closing member 12 and to reliably apply an urging force, and as described above, the outer cylinder 8 The blocking member 12 is prevented from coming out by abutting against the restricting convex portion 16 protruding from the inner periphery of the insertion portion 11. The pressure contact member 14 maintains a liquid-tight state between the tube close contact portion 18 and the tube 5, and can reliably prevent liquid leakage when the closing member 12 moves forward and backward.
[0022]
According to the joint device 1 having the above configuration, as shown in FIG. 5, when the connection end 10 provided at the tip of the syringe or tube (not shown) is inserted into the insertion portion 11 of the outer cylinder 8, The closing member 12 pressed by the connection end 10 is retracted, and the opening 7 of each communication hole 6 of the tubular body 5 penetrating the insertion hole 19 is opened, and the connection end 10 and the port of the three-way stopcock 2 are opened. 3 communicates with the tube body 5.
[0023]
At this time, when the chemical solution is injected from the connection end 10 toward the tube body 5, the tube body 5 includes the respective communication holes 6 and the flow rate of the chemical solution is restricted, so that the chemical solution is placed in the three-way cock 2. Rapid injection is prevented. Further, when the flow rate of the chemical solution is restricted by the tube body 5, the fluid pressure around the tube body 5 increases and the chemical solution tries to enter between the closing member 12 and the tube body 5. Since the tubular body contact portion 18 is pressed against the tubular body 5 by the pressure contact member 14, the penetration of the chemical solution between the tubular body contact portion 18 and the tubular body 5 is prevented.
[0024]
Thereafter, when the connecting end portion 10 is pulled out from the insertion portion 11 of the outer cylinder 8, the closing member 12 moves forward by the urging force of the coil spring 13, and when the tubular body 5 comes out of the insertion hole 19, the tube The opening 7 of each communication hole 6 of the body 5 is closed.
[0025]
Next, another embodiment of the present invention will be described. As shown in FIGS. 6 and 7, the joint device 21 of the other embodiment is provided in one port 3 of the three-way stopcock 2 as in the above-described embodiment. A tubular body 22 having a shape different from that of the body 5 is provided. Moreover, about the structure similar to embodiment mentioned above, in FIG.6 and FIG.7, the code | symbol same as FIG.1 and FIG.5 is attached | subjected and the description is abbreviate | omitted.
[0026]
As shown in FIGS. 6 and 7, the pipe body 22 provided in the joint device 21 of the other embodiment is formed of a hard synthetic resin (for example, polyacetal), and a plurality of communication holes 23 are formed therein. ing. Each communication hole 23 communicates with the tubular tubular body support portion 4 from the rear end of the tubular body 22, and an opening 24 is formed at the distal end of the tubular body 22 so as to open in the axial direction. ing.
[0027]
The tubular body 22 is formed in a tapered shape whose outer diameter gradually increases toward the rear end. At the rear end portion of the tubular body 22, a flange portion 25 is formed that protrudes in a flange shape and comes into contact with the end edge of the cylindrical outer tube support portion 8. A fixed leg portion 26 that is inserted and fixed between the outer cylinder support portion 8 and the tube body support portion 4 is integrally provided behind the flange portion 25. The flange portion 25 is a spring seat that contacts the rear end of the coil spring 13 and prevents damage to the outer cylinder support portion 8 due to contact between the coil spring 13 and the outer cylinder support portion 8.
[0028]
The tubular body 5 configured as described above has improved bending strength due to the expanded rear end, and can reliably prevent the tubular body 22 from being bent when the tubular body 22 is inserted into the insertion hole 19.
[0029]
Further, as shown in FIG. 7, when a connection end 10 provided at the tip of a syringe or tube (not shown) is inserted into the insertion portion 11 of the outer cylinder 8, the obstruction pressed by the connection end 10. When the member 12 is retracted, the tube contact portion 18 of the closing member 12 is pressure-bonded to the expanded portion of the tube body 22, and the degree of contact between the tube contact portion 18 and the tube body 22 can be improved. As a result, even if the flow rate of the chemical injected from the connection end portion 10 toward the tube body 22 is limited by the communication holes 23 of the tube body 22 and the liquid pressure around the tube body 5 rises, the tube body Invasion of the chemical solution between the close contact portion 18 and the tubular body 22 can be more reliably prevented.
[Brief description of the drawings]
FIG. 1 is an explanatory sectional view showing a joint device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional explanatory view of a tubular body.
FIG. 3 is an explanatory front view of a plug portion of a closing member.
FIG. 4 is an explanatory front view of a plug portion of another closing member.
FIG. 5 is an explanatory cross-sectional view showing a connection state of the joint device of FIG. 1;
FIG. 6 is an explanatory cross-sectional view showing a joint device according to another embodiment.
7 is an explanatory cross-sectional view showing a connection state of the joint device of FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,21 ... Joint apparatus, 5,22 ... Tube, 6,23 ... Communication hole, 9 ... Outer cylinder, 10 ... Connection end part (connected object), 11 ... Connection part, 12 ... Closure member, 13 ... Coil Spring (biasing means), 14 ... pressure contact member, 17 ... plug part, 18 ... tube contact part, 19 ... insertion hole (closed hole), 20 ... slit (closed hole).

Claims

管状の被接続物を挿入して接続可能に開口する接続部を先端に備える有底円筒状の外筒と、該外筒の軸心に沿って延設され、後端が外筒の底部外方に連通して先端が開口する管体と、前記外筒にその軸線方向に進退自在に収納されて前進位置において該外筒及び前記管体を閉塞する弾性材料による閉塞部材と、該閉塞部材における前記管体の先端に対向する位置に、該閉塞部材の後退に伴う前記管体の挿通により弾発的に開口し該管体が非挿通時には復元弾性により閉鎖状態となる閉鎖孔と、該閉塞部材を前進方向に付勢する付勢手段とを備える継ぎ手装置において、
前記管体は、棒状の本体と、該本体の後端において外筒の底部外方に連通し、該本体の先端において開口する複数の連通孔とを備えることを特徴とする継ぎ手装置。A cylindrical outer cylinder with a bottom provided with a connecting portion that opens to be connectable by inserting a tubular object to be connected, and extending along the axis of the outer cylinder, with the rear end being outside the bottom of the outer cylinder A tubular body that communicates in the direction and opens at the tip, a closing member that is accommodated in the outer cylinder so as to be movable forward and backward in the axial direction, and closes the outer cylinder and the tubular body in the forward position, and the closing member A closed hole that is elastically opened by insertion of the tubular body as the closing member is retracted at a position facing the tip of the tubular body in the closed state, and is closed by restoring elasticity when the tubular body is not inserted, In a joint device comprising a biasing means for biasing the closing member in the forward direction,
The pipe device includes a rod-shaped main body and a plurality of communication holes that communicate with the outside of the bottom of the outer cylinder at the rear end of the main body and open at the front end of the main body.

前記閉塞部材は、前記閉鎖孔を備えて前記外筒の接続部に挿脱自在に嵌合する栓部と、該栓部の後端に連設されて前記管体の周壁に液密に密着する円筒状の管体密着部とを備え、
該管体密着部の外周に、該管体密着部を前記管体に圧接する環状の圧接部材を設けたことを特徴とする請求項１記載の継ぎ手装置。The closing member is provided with the closing hole and is detachably fitted to the connection portion of the outer cylinder, and is connected to the rear end of the plug portion in a liquid-tight manner to the peripheral wall of the tubular body. A cylindrical tubular body contact portion that
The joint device according to claim 1, wherein an annular pressure contact member that presses the tube contact portion against the tube is provided on an outer periphery of the tube contact portion.

前記管体は、その外径が後端に向かって次第に拡径するテーパ状に形成されていることを特徴とする請求項１又は２記載の継ぎ手装置。The joint device according to claim 1 or 2, wherein the tubular body is formed in a tapered shape whose outer diameter gradually increases toward the rear end.