JP2022088003A

JP2022088003A - Sample port

Info

Publication number: JP2022088003A
Application number: JP2020200203A
Authority: JP
Inventors: 昌吾桶田; Shogo OKEDA; 翔之助奴間; Shonosuke Numa
Original assignee: Shibuya Kogyo Co Ltd
Current assignee: Shibuya Corp
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2022-06-14

Abstract

To reduce pressure loss of a dialysate solution circulating in a dialysate solution circuit and to reduce a load on a liquid feed pump and operation noise.SOLUTION: A sample port 1 includes: a body member 6 which is provided in the middle of a dialysate solution circuit 2 and has a tubular part 6A and a housing part 6B; a valve body 10 which is arranged in the housing part 6B and adheres to an annular packing 8 with a compression spring 9; and a syringe holder 7 which is screwed in the housing part 6B and forms a syringe insertion hole 7A. In the tubular part 6A to be a part of a dialysate solution passage, the valve body and the like are not arranged. When an end part 4A of the syringe 4 is inserted into the syringe insertion hole 7A to press down the valve body 10, the dialysate solution 3 is introduced into the syringe 4 via an internal space 6D of the housing part 6B. Since the valve body 10 and the like are not arranged in the tubular part 6A to be the dialysate solution passage, it is possible for the dialysate solution 3 to reduce pressure loss when circulating in the tubular part 6A and to reduce a load on a liquid feed pump and operation noise.SELECTED DRAWING: Figure 2

Description

本発明はサンプルポートに関し、より詳しくは、例えば人工透析装置の透析液回路に設置する場合に好適なサンプルポートに関する。 The present invention relates to a sample port, and more particularly to a sample port suitable for installation in a dialysate circuit of an artificial dialysis machine, for example.

従来、透析液回路内の透析液をサンプルとして取り出して濃度等を検査するために、透析液回路に設置されるサンプルポートは公知である（例えば特許文献１）。 Conventionally, a sample port installed in a dialysate circuit for taking out a dialysate in the dialysate circuit as a sample and inspecting a concentration or the like is known (for example, Patent Document 1).

実開昭６０－１８３８４５号公報Jitsukaisho 60-183845

ところで、特許文献１のサンプルポートにおいては、シリンジ挿入孔（サンプル採取口２２）を開閉するための構成部品（移動ピン２３、スプリング３５）がサンプルポート内部の透析液通路に配置されている。そのため、上記構成部品が透析液通路にあることで透析液の流れに抵抗が掛かって、透析液通路内を流通する透析液の圧力損失が増大していたものである。そのため、この圧力損失を加味して透析液を流通させる透析液ポンプの能力を選定する必要があり、透析液ポンプの能力が過大になるという問題があった。あるいは、サンプルポートの圧力損失に応じて透析液ポンプ制御電圧を上げる必要があり、透析液ポンプの作動音が大きくなるという問題があった。 By the way, in the sample port of Patent Document 1, components (moving pin 23, spring 35) for opening and closing the syringe insertion hole (sample collection port 22) are arranged in the dialysate passage inside the sample port. Therefore, since the above-mentioned components are located in the dialysate passage, resistance is applied to the flow of the dialysate, and the pressure loss of the dialysate flowing in the dialysate passage is increased. Therefore, it is necessary to select the capacity of the dialysate pump for circulating the dialysate in consideration of this pressure loss, and there is a problem that the capacity of the dialysate pump becomes excessive. Alternatively, it is necessary to increase the dialysate pump control voltage according to the pressure loss of the sample port, and there is a problem that the operating noise of the dialysate pump becomes loud.

上述した事情に鑑み、本発明は、液体回路の途中に設けられて、該液体回路の液体が流通する液通路と、取り出し器具が挿入される器具挿入孔と、付勢手段によって上記器具挿入孔に向けて付勢されて、上記器具挿入孔に設けられた弁座に着座する弁体とを備えて、
上記器具挿入孔に取り出し器具が挿入されて弁体が弁座から離座すると、上記液通路内の液体を上記取り出し器具内に導入可能なサンプルポートにおいて、
上記液体回路の上記液通路となる管状部と、該管状部からずれたその外方側に設けられるとともに管状部および上記器具挿入孔と連通する収容部とを備え、
該収容部の内部空間に上記弁体および付勢手段が収容されていることを特徴とするものである。 In view of the above circumstances, the present invention is provided in the middle of the liquid circuit, and has a liquid passage through which the liquid of the liquid circuit flows, an instrument insertion hole into which a take-out instrument is inserted, and an instrument insertion hole by means of urging means. With a valve body that is urged toward and sits on a valve seat provided in the instrument insertion hole.
When the take-out device is inserted into the device insertion hole and the valve body separates from the valve seat, the liquid in the liquid passage can be introduced into the take-out device at the sample port.
It is provided with a tubular portion that serves as a liquid passage of the liquid circuit, and a housing portion that is provided on the outer side of the tubular portion and communicates with the tubular portion and the instrument insertion hole.
The valve body and the urging means are accommodated in the internal space of the accommodating portion.

このような構成によれば、上記液通路となる管状部の内部には、弁体及び付勢手段は設置されていないので、液体回路を流通する液体の圧力損失を可及的に小さくすることができ、送液ポンプの負荷を低減させることができる。 According to such a configuration, since the valve body and the urging means are not installed inside the tubular portion serving as the liquid passage, the pressure loss of the liquid flowing through the liquid circuit should be minimized. It is possible to reduce the load on the liquid feed pump.

本発明の一実施例を示す縦断面図。The vertical sectional view which shows one Example of this invention. 図１のサンプルポートからシリンジを用いて透析液を取り出し中の状態を示す断面図。FIG. 3 is a cross-sectional view showing a state in which dialysate is being taken out from the sample port of FIG. 1 using a syringe. 図１に示す弁体の拡大平面図。An enlarged plan view of the valve body shown in FIG. 1. 図３の側面図。The side view of FIG.

以下、図示実施例について本発明を説明すると、図１ないし図２において、１はサンプルポートであり、このサンプルポート１は人工透析装置の透析液回路２の途中に設けられており、該透析液回路２内を流通する透析液３をシリンジ４によりサンプルとして取り出すことができるようになっている。
サンプルポート１は、直線状のパイプからなる管状部６Ａ及びその長手方向中央部の外方に突設された収容部６Ｂを有する本体部材６と、本体部材６の収容部６Ｂに取り付けられてその開口部を閉鎖するとともに、シリンジ挿入孔７Ａが形成されたシリンジホルダ７と、シリンジホルダ７の上端となる壁部７Ｂの内面と収容部６Ｂの上端との間に介在させた弁座としての環状パッキン８と、収容部６Ｂの内部に配置されて圧縮ばね９によって環状パッキン８に着座する弁体１０とを備えている。 Hereinafter, the present invention will be described with respect to the illustrated examples. In FIGS. 1 to 2, reference numeral 1 is a sample port, and the sample port 1 is provided in the middle of the dialysate circuit 2 of the artificial dialysis apparatus. The dialysate 3 circulating in the circuit 2 can be taken out as a sample by the syringe 4.
The sample port 1 is attached to a main body member 6 having a tubular portion 6A made of a straight pipe and an accommodating portion 6B projecting outward from the central portion in the longitudinal direction thereof, and an accommodating portion 6B of the main body member 6. An annular shape as a valve seat interposed between the syringe holder 7 in which the syringe insertion hole 7A is formed and the inner surface of the wall portion 7B which is the upper end of the syringe holder 7 and the upper end of the accommodating portion 6B while closing the opening. It includes a packing 8 and a valve body 10 arranged inside the accommodating portion 6B and seated on the annular packing 8 by a compression spring 9.

本実施例のサンプルポート１は、本体部材６の管状部６Ａが透析液回路２の透析液通路の一部を構成しているが、該管状部６Ａの内部に弁体１０等を配置しない構成となっているので、透析液回路２の透析液通路を流通する透析液３の圧力損失を低減できることが特徴となっている。
本体部材６は剛性を有する合成樹脂からなり、パイプ状となった管状部６Ａと、その長手方向中央部から連続して外部上方に向けて突設された収容部６Ｂとを備えている。つまり、収容部６Ｂは管状部６Ａからずれた外方側に設けられている。
管状部６Ａの一端６ａと他端６ｂは、透析液回路２の透析液通路としてのチューブの一端２Ａと他端２Ｂに接続されている。管状部６Ａの内部は、透析液回路２の透析液通路の一部を構成している。また、管状部６Ａの内径は、透析液回路２の一端２Ａ、他端２Ｂと同じ内径に設定されている。つまり、透析液通路としての管状部６Ａの内径は、それに接続された透析液回路２のチューブの内径と略同じ寸法に設定されている。
収容部６Ｂの底面となる管状部６Ａの長手方向中央部に連通孔６ｃが形成されており、該連通孔６ｃを介して管状部６Ａ内と収容部６Ｂの内部空間６Ｄが常時連通している。
収容部６Ｂの内部空間６Ｄ内に略円筒形状の弁体１０とそれを付勢する圧縮ばね９が収容されており、弁体１０は圧縮ばね９によって常時上方側の環状パッキン８に向けて付勢されている。収容部６Ｂの外周部は、雄ねじが形成されたねじ部６Ｅとなっている。
シリンジホルダ７は内周部に雌ねじが形成された袋ナットのような形状を有しており、シリンジホルダ７の壁部７Ｂの中央にシリンジ挿入孔７Ａが穿設されている。また、壁部７Ｂにおける下部には、シリンジ挿入孔７Ａから連続してその隣接下方側に大径孔７Ｃが形成されており、そこに環状パッキン８が装着されている。そして、環状パッキン８が装着された状態のシリンジホルダ７は、その雌ねじ部を上記収容部６Ｂのねじ部６Ｅに螺合されている。
それにより、シリンジホルダ７が収容部６に連結されており、また、環状パッキン８は収容部６Ｂの上端とシリンジホルダ７の壁部７Ｂとの間に挟持されている。この環状パッキン８によって収容部６Ｂの上端とシリンジホルダ７の壁部７Ｂとの間のシールが維持されている。
そして、シリンジ挿入孔７Ａは環状パッキン８の内部空間を介して収容部６Ｂの内部空間６Ｄと連通するようになっている。自然状態における環状パッキン８の内径は、シリンジ挿入孔７Ａの内径よりも少し小さな寸法に設定されている。そのため、シリンジ挿入孔７Ａ及び環状パッキン８内にシリンジ４の先端部４Ａが挿入されると、該先端部４Ａの外周部はシリンジ挿入孔７Ａによって保持されるとともに先端部４Ａが環状パッキン８の内周面に密着して、それらの間のシールが維持されるようになっている。
シリンジ挿入孔７Ａにシリンジ４の先端部４Ａが挿入されていない状態では、圧縮ばね９によって上方へ付勢された弁体１０の環状シール部１０ｂ（上端）が弁座としての環状パッキン８の下面に密着するようになっている（図１参照）。この状態では、弁体１０によってシリンジ挿入孔７Ａが閉鎖されることになるので、該シリンジ挿入孔７Ａと内部空間６Ｄとの連通が阻止されるようになっている。
以上のように、本実施例においては、透析液回路２の透析液通路としての管状部６Ａからずれた外部に収容部６Ｂが設けられており、この収容部６Ｂの内部空間６Ｄに弁体１０と圧縮ばね９とを収容する構成となっている。つまり、透析液通路としての管状部６Ａ内には弁体１０等の部材は配置されていない。
収容部６Ｂの内部空間６Ｄの下端は連通孔６ｃを介して透析液通路となる管状部６Ａと常時連通しているので、収容部６Ｂの内部空間６Ｄには、連通孔６ｃを介して管状部６Ａから導入された透析液３が貯溜されるようになっている。 In the sample port 1 of this embodiment, the tubular portion 6A of the main body member 6 constitutes a part of the dialysate passage of the dialysate circuit 2, but the valve body 10 or the like is not arranged inside the tubular portion 6A. Therefore, it is characterized in that the pressure loss of the dialysate 3 flowing through the dialysate passage of the dialysate circuit 2 can be reduced.
The main body member 6 is made of a rigid synthetic resin, and includes a pipe-shaped tubular portion 6A and an accommodating portion 6B that is continuously projected upward from the central portion in the longitudinal direction. That is, the accommodating portion 6B is provided on the outer side displaced from the tubular portion 6A.
One end 6a and the other end 6b of the tubular portion 6A are connected to one end 2A and the other end 2B of the tube as a dialysate passage of the dialysate circuit 2. The inside of the tubular portion 6A constitutes a part of the dialysate passage of the dialysate circuit 2. The inner diameter of the tubular portion 6A is set to be the same as the inner diameter of one end 2A and the other end 2B of the dialysate circuit 2. That is, the inner diameter of the tubular portion 6A as the dialysate passage is set to substantially the same dimension as the inner diameter of the tube of the dialysate circuit 2 connected to the tubular portion 6A.
A communication hole 6c is formed in the central portion in the longitudinal direction of the tubular portion 6A which is the bottom surface of the accommodating portion 6B, and the inside of the tubular portion 6A and the internal space 6D of the accommodating portion 6B are always in communication with each other through the communication hole 6c. ..
A substantially cylindrical valve body 10 and a compression spring 9 for urging the valve body 10 are housed in the internal space 6D of the accommodating portion 6B, and the valve body 10 is always attached to the annular packing 8 on the upper side by the compression spring 9. It is being pushed. The outer peripheral portion of the accommodating portion 6B is a threaded portion 6E on which a male screw is formed.
The syringe holder 7 has a shape like a cap nut having a female screw formed on the inner peripheral portion, and a syringe insertion hole 7A is formed in the center of the wall portion 7B of the syringe holder 7. Further, in the lower portion of the wall portion 7B, a large-diameter hole 7C is formed continuously from the syringe insertion hole 7A on the lower side adjacent to the syringe insertion hole 7A, and the annular packing 8 is mounted therein. The syringe holder 7 with the annular packing 8 attached has its female threaded portion screwed into the threaded portion 6E of the accommodating portion 6B.
As a result, the syringe holder 7 is connected to the accommodating portion 6, and the annular packing 8 is sandwiched between the upper end of the accommodating portion 6B and the wall portion 7B of the syringe holder 7. The annular packing 8 maintains a seal between the upper end of the accommodating portion 6B and the wall portion 7B of the syringe holder 7.
The syringe insertion hole 7A communicates with the internal space 6D of the accommodating portion 6B via the internal space of the annular packing 8. The inner diameter of the annular packing 8 in the natural state is set to be slightly smaller than the inner diameter of the syringe insertion hole 7A. Therefore, when the tip portion 4A of the syringe 4 is inserted into the syringe insertion hole 7A and the annular packing 8, the outer peripheral portion of the tip portion 4A is held by the syringe insertion hole 7A and the tip portion 4A is inside the annular packing 8. It is in close contact with the peripheral surface and the seal between them is maintained.
In a state where the tip portion 4A of the syringe 4 is not inserted into the syringe insertion hole 7A, the annular seal portion 10b (upper end) of the valve body 10 urged upward by the compression spring 9 is the lower surface of the annular packing 8 as a valve seat. (See Fig. 1). In this state, the syringe insertion hole 7A is closed by the valve body 10, so that the communication between the syringe insertion hole 7A and the internal space 6D is blocked.
As described above, in the present embodiment, the accommodating portion 6B is provided outside the tubular portion 6A as the dialysate passage of the dialysate circuit 2, and the valve body 10 is provided in the internal space 6D of the accommodating portion 6B. And the compression spring 9 are accommodated. That is, no member such as the valve body 10 is arranged in the tubular portion 6A as the dialysate passage.
Since the lower end of the internal space 6D of the accommodating portion 6B is always in communication with the tubular portion 6A which is the dialysate passage through the communication hole 6c, the tubular portion is connected to the internal space 6D of the accommodating portion 6B via the communication hole 6c. The dialysate 3 introduced from 6A is stored.

次に、図３ないし図４に示すように、弁体１０は、上方側に位置してカップ状をした流路形成部１０Ａと、その下方側に連設された円周方向３箇所の脚部１０Ｂと、脚部１０Ｂと流路形成部１０Ａとの境界部における外周部に突設された３箇所のつば部１０Ｃとを備えている。
上記圧縮ばね９の下端部は本体部材６の収容部６Ｂの底部に当接しており、圧縮ばね９の上端は、弁体１０の円周方向３箇所のつば部１０Ｃに当接している。そのため、弁体１０は圧縮ばね９によって常時、環状パッキン８に当接する方向に付勢されるとともに、弁体１０の軸心は、シリンジ挿入孔７Ａと一致するようになっている。
円周方向３箇所のつば部１０Ｃの外周面は、収容部６Ｂの内周面を摺動して昇降されるので、弁体１０はシリンジ挿入孔７Ａと同一軸線上で昇降されるようになっている。また、流路形成部１０Ａの外周面１０ａと収容部６Ｂの内周面との間には、常時、円周方向における環状の隙間６Ｆが維持されている。
そのため、管状部６Ａ（透析液通路）内の透析液３は、連通孔６ｃを介して収容部６Ｂ内に導入されるとともに上記環状の隙間６Ｆにも透析液３が導入されるようになっている。
流路形成部１０Ａの外径は、環状パッキン８の内径及びシリンジ４の先端部４Ａの外径よりも大きな寸法に設定されており、この流路形成部１０Ａの上端が環状パッキン８の下面（弁座）に密着するシール部１０ｂとなっている。
したがって、図１に示したように、圧縮ばね９によって付勢された弁体１０のシール部１０ｂが環状パッキン８の下面（弁座）に着座した状態では、収容部６Ｂの内部空間６Ｄ、環状の隙間６Ｆとシリンジ挿入孔７Ａとの連通は阻止され、シリンジ挿入孔７Ａは閉鎖されるようになっている。
開口が上方を向けた流路形成部１０Ａの内部は、下方側が小径部で上方側が大径部となる段付孔１０ｄとして形成されている。この段付孔１０ｄには、上端から底部にわたって軸方向と直交する十字溝１０ｅが形成されている。この十字溝１０ｅの内部空間が透析液３を流通させるための液通路として機能するようになっている。段付孔１０ｄにおける小径部の内径は、シリンジ４の先端部４Ａの外径よりもわずかに大きな寸法に設定されている。 Next, as shown in FIGS. 3 to 4, the valve body 10 has a cup-shaped flow path forming portion 10A located on the upper side and three legs in the circumferential direction connected to the lower side thereof. The portion 10B is provided with three brim portions 10C projecting from the outer peripheral portion at the boundary portion between the leg portion 10B and the flow path forming portion 10A.
The lower end of the compression spring 9 is in contact with the bottom of the accommodating portion 6B of the main body member 6, and the upper end of the compression spring 9 is in contact with the brim portions 10C at three points in the circumferential direction of the valve body 10. Therefore, the valve body 10 is always urged by the compression spring 9 in the direction of contacting the annular packing 8, and the axis of the valve body 10 coincides with the syringe insertion hole 7A.
Since the outer peripheral surface of the brim portion 10C at three points in the circumferential direction slides up and down on the inner peripheral surface of the accommodating portion 6B, the valve body 10 is moved up and down on the same axis as the syringe insertion hole 7A. ing. Further, an annular gap 6F in the circumferential direction is always maintained between the outer peripheral surface 10a of the flow path forming portion 10A and the inner peripheral surface of the accommodating portion 6B.
Therefore, the dialysate 3 in the tubular portion 6A (dialysate passage) is introduced into the accommodating portion 6B through the communication hole 6c, and the dialysate 3 is also introduced into the annular gap 6F. There is.
The outer diameter of the flow path forming portion 10A is set to be larger than the inner diameter of the annular packing 8 and the outer diameter of the tip portion 4A of the syringe 4, and the upper end of the flow path forming portion 10A is the lower surface of the annular packing 8. It is a seal portion 10b that is in close contact with the valve seat).
Therefore, as shown in FIG. 1, when the seal portion 10b of the valve body 10 urged by the compression spring 9 is seated on the lower surface (valve seat) of the annular packing 8, the internal space 6D of the accommodating portion 6B is annular. Communication between the gap 6F and the syringe insertion hole 7A is blocked, and the syringe insertion hole 7A is closed.
The inside of the flow path forming portion 10A having the opening facing upward is formed as a stepped hole 10d having a small diameter portion on the lower side and a large diameter portion on the upper side. A cross groove 10e orthogonal to the axial direction is formed in the stepped hole 10d from the upper end to the bottom. The internal space of the cross groove 10e functions as a liquid passage for circulating the dialysate 3. The inner diameter of the small diameter portion of the stepped hole 10d is set to be slightly larger than the outer diameter of the tip portion 4A of the syringe 4.

そのため、弁体１０のシール部１０ｂ（流路形成部１０Ａの上端）が環状パッキン８の下面（弁座）に着座した状態では、シリンジ挿入孔７Ａは閉鎖されている。
これに対して、透析液回路２から透析液３をサンプルとして取り出す場合には、作業者がシリンジ４の先端部４Ａを上方からシリンジ挿入孔７Ａに挿入するとともに環状パッキン８内を挿通させ、さらに先端部４Ａにより弁体１０を圧縮ばね９に抗して押し下げる（図２参照）。
すると、環状パッキン８の下面（弁座）から弁体１０のシール部１０ｂが離座するので、それらの間に隙間Ｘ１が生じる。そのため、収容部６Ｂ内と環状の隙間６Ｆまで導入されている透析液３が、流路形成部１０Ａのシール部１０ｂを越えてその内方側に流入し、さらに、シリンジ４の先端部４Ａの外周面と十字溝１０ｅの４箇所の外方端との隙間Ｘ２から十字溝１０ｅ内に流入し、その後、シリンジ４の先端部４Ａ内からシリンジ４内に導入される。
このようにして、流路形成部１０Ａの十字溝１０ｅ等が液通路として機能して、収容部６Ｂ内まで流入している透析液３がシリンジ４内にサンプルとして導入されるようになっている。
その後、所要量の透析液３がシリンジ４内に導入されたら、作業者によってシリンジ４の先端部４Ａがシリンジ挿入孔７Ａ及び環状パッキン８から抜き取られると、圧縮ばね９の付勢力によって弁体１０のシール部１０ｂ（流路形成部１０Ａの上端）が環状パッキン８の下面（弁座）に着座する。これにより、図１に示した状態に復帰し、収容部６Ｂの内部空間６Ｄ及び環状の隙間６Ｆとシリンジ挿入孔７Ａとの連通が阻止されて、該シリンダ挿入孔７Ａが閉鎖されて透析液３の取り出しが停止される。 Therefore, the syringe insertion hole 7A is closed when the seal portion 10b (upper end of the flow path forming portion 10A) of the valve body 10 is seated on the lower surface (valve seat) of the annular packing 8.
On the other hand, when the dialysate 3 is taken out as a sample from the dialysate circuit 2, the operator inserts the tip portion 4A of the syringe 4 into the syringe insertion hole 7A from above and inserts the inside of the annular packing 8 further. The tip portion 4A pushes down the valve body 10 against the compression spring 9 (see FIG. 2).
Then, since the seal portion 10b of the valve body 10 is separated from the lower surface (valve seat) of the annular packing 8, a gap X1 is generated between them. Therefore, the dialysate 3 introduced into the accommodating portion 6B and up to the annular gap 6F flows inward beyond the sealing portion 10b of the flow path forming portion 10A, and further, the tip portion 4A of the syringe 4 It flows into the cross groove 10e from the gap X2 between the outer peripheral surface and the four outer ends of the cross groove 10e, and then is introduced into the syringe 4 from the tip portion 4A of the syringe 4.
In this way, the cross groove 10e of the flow path forming portion 10A functions as a liquid passage, and the dialysate 3 flowing into the accommodating portion 6B is introduced into the syringe 4 as a sample. ..
After that, when the required amount of dialysate 3 is introduced into the syringe 4, the tip portion 4A of the syringe 4 is pulled out from the syringe insertion hole 7A and the annular packing 8, and the valve body 10 is urged by the compression spring 9. The seal portion 10b (upper end of the flow path forming portion 10A) is seated on the lower surface (valve seat) of the annular packing 8. As a result, the state shown in FIG. 1 is restored, the communication between the internal space 6D of the accommodating portion 6B and the annular gap 6F and the syringe insertion hole 7A is blocked, the cylinder insertion hole 7A is closed, and the dialysate 3 is closed. Extraction is stopped.

以上のように、本実施例のサンプルポート１は、弁体１０及び圧縮ばね９は、透析液通路となる管状部６Ａ内に設けられておらず、収容部６Ｂの内部空間６Ｄに収容されている。そのため、透析液回路２の透析液通路内を流通する透析液３に対してサンプルポート１の弁体１０等から抵抗が掛かることはなく、透析液３が流通する際の圧力損失を可及的に小さくすることができる。それにより、透析液３を送液するために透析液回路２に配置された図示しない送液ポンプの負荷および作動音を低減させることが可能である。 As described above, in the sample port 1 of this embodiment, the valve body 10 and the compression spring 9 are not provided in the tubular portion 6A serving as the dialysate passage, but are accommodated in the internal space 6D of the accommodating portion 6B. There is. Therefore, resistance is not applied from the valve body 10 or the like of the sample port 1 to the dialysate 3 flowing in the dialysate passage of the dialysate circuit 2, and the pressure loss when the dialysate 3 flows is possible. Can be made smaller. Thereby, it is possible to reduce the load and operating noise of the liquid feed pump (not shown) arranged in the dialysate circuit 2 for feeding the dialysate 3.

なお、上述した実施例はサンプルポート１を透析液回路２に設置して透析液をサンプルとして取り出す場合について説明しているが、これに限定されるものではなく、所要の液体を送液する液回路からサンプルとして液体を取り出す箇所に本実施例のサンプルポート１を設置することができる。
また、上記実施例においては、シリンジホルダ７の壁部７Ｂと収容部６Ｂの上端との間に環状パッキン８を介在させているが、この環状パッキン８は省略してもよい。
さらに、上記実施例においては、管状部６Ａと収容部６Ｂの軸心が直交するように配置しているが、それ以外の角度で交差させても良く、あるいは、互いの軸心がオフセットするように配置しても良い。 In the above-described embodiment, the case where the sample port 1 is installed in the dialysate circuit 2 and the dialysate is taken out as a sample is described, but the present invention is not limited to this, and the liquid for sending the required liquid is not limited thereto. The sample port 1 of this embodiment can be installed at a place where the liquid is taken out as a sample from the circuit.
Further, in the above embodiment, the annular packing 8 is interposed between the wall portion 7B of the syringe holder 7 and the upper end of the accommodating portion 6B, but the annular packing 8 may be omitted.
Further, in the above embodiment, the tubular portions 6A and the accommodating portions 6B are arranged so that the axes are orthogonal to each other, but they may be crossed at other angles, or the axes of the tubular portions 6A and the accommodating portions 6B may be offset from each other. It may be placed in.

１…サンプルポート２…透析液回路（液回路）
３…透析液（液体）４…シリンジ
６…本体部材６Ａ…管状部（液通路）
６Ｂ…収容部６Ｄ…内部空間（収容空間）
７…シリンジホルダ７Ａ…シリンジ挿入孔
８…環状パッキン９…圧縮ばね（付勢手段）
１０…弁体 1 ... Sample port 2 ... Dialysate circuit (liquid circuit)
3 ... Dialysate (liquid) 4 ... Syringe 6 ... Main body member 6A ... Tubular part (liquid passage)
6B ... Containment part 6D ... Internal space (accommodation space)
7 ... Syringe holder 7A ... Syringe insertion hole 8 ... Circular packing 9 ... Compression spring (urging means)
10 ... Valve body

Claims

The instrument is provided in the middle of the liquid circuit and is urged toward the instrument insertion hole by a liquid passage through which the liquid of the liquid circuit flows, an instrument insertion hole into which a take-out instrument is inserted, and an urging means. With a valve body that sits on the valve seat provided in the insertion hole,
When the take-out device is inserted into the device insertion hole and the valve body separates from the valve seat, the liquid in the liquid passage can be introduced into the take-out device at the sample port.
It is provided with a tubular portion that serves as a liquid passage of the liquid circuit, and a housing portion that is provided on the outer side of the tubular portion and communicates with the tubular portion and the instrument insertion hole.
A sample port characterized in that the valve body and the urging means are accommodated in the internal space of the accommodating portion.

The tubular portion and the accommodating portion are integrally formed to form a main body member.
It is provided with a holder that is attached to the accommodating portion and has an instrument insertion hole formed therein, and an annular packing that is interposed between the inside of the holder and the accommodating portion and serves as a valve seat.
The internal space of the accommodating portion communicates with the instrument insertion hole of the holder and also communicates with the inside of the tubular portion through the communication hole formed in the tubular portion.
The above-mentioned urging means is mounted between the bottom of the housing and the valve body.
The sample port according to claim 1, wherein the valve body is seated on the annular packing and the instrument insertion hole is closed when the extraction instrument is not inserted into the instrument insertion hole.