JP4679984B2 - Grip detection device - Google Patents

Grip detection device Download PDF

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JP4679984B2
JP4679984B2 JP2005197984A JP2005197984A JP4679984B2 JP 4679984 B2 JP4679984 B2 JP 4679984B2 JP 2005197984 A JP2005197984 A JP 2005197984A JP 2005197984 A JP2005197984 A JP 2005197984A JP 4679984 B2 JP4679984 B2 JP 4679984B2
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pusher
liquid feeding
gripping
liquid
magnet
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JP2007014492A (en
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直孝 佐々木
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Nidec Servo Corp
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Nidec Servo Corp
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Description

本発明は,予め容器に収納された液体を押子で送液する押し出し式送液装置や血液透析装置など医療用装置に搭載されるシリンジ押子検知装置の改良に関する。   The present invention relates to an improvement of a syringe pusher detection device mounted on a medical device such as a push-out type liquid feeding device or a hemodialysis device that feeds liquid stored in a container in advance with a pusher.

一般に,容器に収納された液体を容器の内筒に沿って移動する押子で容器外へ押し出す機構では,押子の端部に備えられた鍔部を押圧しながら押子を移動させて収納された液体を押し出す方式が採られる。この場合,液体を収納した容器は,押子で押圧される面と反対側に送液のために小径の穴を有する送液部が設けられている。多くの場合,この送液部に送液経路を構成するチューブが接続され,押子の押圧動作によって所望の場所へ液体を送液可能となっている。この押子に対する押圧は,送液制御に正確さを必要としない場合は手動で押し込むことがあるが,送液を長時間に亘って一定速度で行う場合は,機械装置を使用して行われる。   In general, in a mechanism that pushes liquid stored in a container out of the container with a pusher that moves along the inner cylinder of the container, the pusher is moved while being pressed against the collar provided at the end of the pusher. A method of extruding the applied liquid is adopted. In this case, the container containing the liquid is provided with a liquid feeding section having a small-diameter hole for liquid feeding on the side opposite to the surface pressed by the pusher. In many cases, a tube constituting a liquid supply path is connected to the liquid supply unit, and liquid can be supplied to a desired place by the pressing operation of the pusher. This pressing against the pusher may be manually pushed in if liquid feeding control does not require accuracy, but if the liquid feeding is performed at a constant speed for a long time, it is performed using a mechanical device. .

このように機械装置を使用した送液の一例として,特許文献1に開示された従来例がある。この例は,血液透析装置の体外循環回路における血液の凝固を防止する抗凝固剤ヘパリンの注入に使用されるシリンジポンプ装置を示している。特許文献1の第2図で,シリンジ6のプランジャ18(押子)の鍔19は可動腕20(ホルダ)に備えられた溝21に係合し,ラックバー22とモータ3のピニオン23の噛み合いによって可動腕20を直線的に移動させ,結果としてシリンジ6内の抗凝固剤をプランジャ18で押し出す操作を実行している。   As an example of liquid feeding using such a mechanical device, there is a conventional example disclosed in Patent Document 1. This example shows a syringe pump device used for injection of an anticoagulant heparin that prevents blood coagulation in the extracorporeal circuit of the hemodialysis apparatus. In FIG. 2 of Patent Document 1, the flange 19 of the plunger 18 (presser) of the syringe 6 is engaged with the groove 21 provided in the movable arm 20 (holder), and the rack bar 22 and the pinion 23 of the motor 3 are engaged. Thus, the movable arm 20 is moved linearly, and as a result, the operation of pushing out the anticoagulant in the syringe 6 with the plunger 18 is executed.

しかし,この従来例で示した血液透析装置のように,薬液を長時間に亘って患者へ自動注入する場合,何らかの理由でシリンジの押子がホルダの把持機構から外れた状態を放置すると,患者に対して極めて危険な事態を招くため,このようなシリンジポンプ装置では押子の把持状態を常にモニタできる機能を付加することが必須であるが,特許文献1ではその機能に関する具体的な開示はなされていない。
実公平6−13743号公報
However, like the hemodialysis machine shown in this conventional example, when a medical solution is automatically injected into a patient for a long time, if the syringe pusher is removed from the holder holding mechanism for some reason, In such a syringe pump device, it is indispensable to add a function that can always monitor the gripping state of the pusher. However, Patent Document 1 discloses a specific disclosure regarding the function. Not done.
Japanese Utility Model No. 6-13743

解決しようとする課題は,一端に送液部を有する容器に収納された液体を装置に内蔵された制御回路による制御に従って他端側から押子で押し出す送液動作中に押子把持状態を常に監視し,該把持状態の信号を高い信頼性で制御回路へ伝達する手段を備えておらず,簡素で安価な構成で安全な医療用装置を実現できていない点である。   The problem to be solved is that the pusher gripping state is always maintained during the liquid feeding operation in which the liquid contained in the container having the liquid feeding part at one end is pushed out by the pusher from the other end side according to the control by the control circuit incorporated in the apparatus. There is no means for monitoring and transmitting the grip state signal to the control circuit with high reliability, and a safe medical device cannot be realized with a simple and inexpensive configuration.

本発明は,押子を把持する把持機構による該押子の把持有無に応じた標示信号を磁気的に生成し,且つ生成された標示信号を無線で前記制御回路へ伝達する標示信号伝達手段を有する構成とし,特に標示信号伝達手段には,前記把持機構の移動方向に沿って対向して延設された磁性板と対向面に感磁素子を備え且つ該磁性板に向かって該押子の把持有無に応じで近接離接する磁石を備え,該磁石の近接離接状態を前記感磁素子で電気信号に変換することを可能とした構成としていることを最も主要な特徴とする。   The present invention provides a sign signal transmission means for magnetically generating a sign signal according to whether or not the pusher is gripped by a gripping mechanism for gripping the pusher and transmitting the generated sign signal to the control circuit wirelessly. In particular, the sign signal transmission means includes a magnetic plate extending opposite to the moving direction of the gripping mechanism and a magnetosensitive element on the opposite surface, and the pusher is moved toward the magnetic plate. The main feature is that a magnet is provided that comes close to and away from each other depending on whether or not it is gripped, and that the state of proximity and separation of the magnet can be converted into an electrical signal by the magnetosensitive element.

本発明の把持検知装置は,押子の把持状態に応じて磁気的に生成された標示信号が無線で制御回路へ確実に伝達されるから,何らかの理由で押子が把持機構から外れた場合は,装置における医療行為の継続を中止し,医師や看護師など管理者へ異常警報を発することが可能となるので,簡素で安価な構成で押子の把持検知装置を搭載した安全な医療用装置を提供できるという利点がある。   In the gripping detection device of the present invention, since the sign signal generated magnetically according to the gripping state of the pusher is reliably transmitted to the control circuit wirelessly, if the pusher is detached from the gripping mechanism for some reason, Because it is possible to stop the medical action in the device and issue an alarm to the administrator such as a doctor or nurse, a safe medical device equipped with a pusher grip detection device with a simple and inexpensive configuration There is an advantage that can be provided.

一端に送液部を有する容器に収納された液体を他端側から押子で押し出し中に,押子の把持状態すなわち押子外れの不具合を確実に検知して安全な医療用装置を実現するという目的を,簡素で且つ安価な構成で押子による送液機能を損なわずに実現した。   Realizing a safe medical device by reliably detecting the gripping state of the pusher, that is, the problem of detachment of the pusher while the liquid stored in the container having the liquid feeding part at one end is pushed out from the other end by the pusher This was achieved with a simple and inexpensive configuration without compromising the liquid feeding function of the pusher.

図1は,本発明装置の1実施例の概略図であって,1は送液装置,2は液体を収納した容器,3は容器フランジ,5は押子,6は押子の押圧面を構成する鍔部,7はホルダ,8Aおよび8Bは鈎状フック,9Aおよび9Bは鈎状フック8Aおよび8Bの回動支点,10は鈎状フック8Aおよび8Bに対する弾性付勢手段のバネ,11は解放ボタン,13は押子把持検出チップ,102は検知レバー,104は磁石,105は送液装置1側に設置され対面するように組み合わせた磁性板106は対面した磁性板105間に設けられた感磁素子,14はホルダ7に結合されたガイド棒,17は駆動モータ,20はリードスクリュウ,21はリードスクリュウ20と噛み合うナットを内包しリードスクリュウ20の回転に応じてガイド棒14を移動するキャリッジ,23はキャリッジ21の移動位置を検出するリニアエンコーダ,24は指令に応じて送液経路25を閉塞するクランプである。   FIG. 1 is a schematic view of an embodiment of the apparatus of the present invention, in which 1 is a liquid feeding device, 2 is a container containing a liquid, 3 is a container flange, 5 is a pusher, and 6 is a pressing surface of the pusher. Consists of parts, 7 is a holder, 8A and 8B are hook-like hooks, 9A and 9B are pivoting fulcrums of hook-like hooks 8A and 8B, 10 is a spring of elastic biasing means for hook-like hooks 8A and 8B, 11 is The release button, 13 is a pusher gripping detection chip, 102 is a detection lever, 104 is a magnet, 105 is installed on the liquid feeding device 1 side, and the magnetic plate 106 combined so as to face each other is provided between the facing magnetic plates 105 Magnetosensitive element 14 is a guide rod coupled to the holder 7, 17 is a drive motor, 20 is a lead screw, 21 is a nut that engages with the lead screw 20, and the guide rod 14 is moved according to the rotation of the lead screw 20. That the carriage, the linear encoder for detecting the moving position of the carriage 21 23, 24 is a clamp for closing the liquid supply path 25 in response to a command.

同図で,支持フレーム16に取り付けられた駆動モータ17の動力は,ピニオンギヤ18とリードスクリュウ20の一端にピニオンギヤ18と噛み合う従動ギヤ19を介してリードスクリュウ20へ伝達されてリードスクリュウ20を回転し,この回転に応じてリードスクリュウ20と噛み合うナット(図示せず)を内包したキャリッジ21を直線移動させる構成となっている。キャリッジ21には光学式センサ22が備えられており,この光学式センサ22に対向するように配置されたリニアエンコーダ23のスリット信号からキャリッジ22の現在位置を把握可能としている。ガイド棒14およびホルダ7はキャリッジ21に対して一体に結合されており,キャリッジ21が矢印S方向へ直線移動するとホルダ7も同時に矢印S方向へ直線移動する。また,キャリッジ21内部には,内包するナットとリードスクリュウ20の噛み合いを解除できるクラッチ機構も内包されており,解放ボタン11を押すとクラッチ機構が作動してキャリッジ21に内包されたナットとリードスクリュウ20の噛み合いが解放されてホルダ7は手動で移動可能となる仕組みとなっている。尚,駆動モータ17は一般にステッピングモータやDCモータが採用され,リニアエンコーダ23として光学式の他に磁気式や,更にリニアエンコーダ23の代替としてリードスクリュウ20の他端に光学式あるいは磁気式ロータリエンコーダを搭載しても同様の機能を実現できる。また,このような駆動機構をリニアモータとリニアエンコーダで構成しても同様の機能を実現できる。   In the figure, the power of the drive motor 17 attached to the support frame 16 is transmitted to the lead screw 20 via the driven gear 19 that meshes with the pinion gear 18 at one end of the pinion gear 18 and the lead screw 20 to rotate the lead screw 20. The carriage 21 containing a nut (not shown) that meshes with the lead screw 20 is linearly moved in accordance with this rotation. The carriage 21 is provided with an optical sensor 22, and the current position of the carriage 22 can be grasped from the slit signal of the linear encoder 23 arranged so as to face the optical sensor 22. The guide bar 14 and the holder 7 are integrally coupled to the carriage 21. When the carriage 21 linearly moves in the arrow S direction, the holder 7 also linearly moves in the arrow S direction at the same time. The carriage 21 also includes a clutch mechanism that can release the engagement between the nut and the lead screw 20 contained therein. When the release button 11 is pressed, the clutch mechanism is activated and the nut and lead screw contained in the carriage 21 are engaged. The 20 meshing is released, and the holder 7 can be moved manually. The drive motor 17 is generally a stepping motor or a DC motor. In addition to an optical type as the linear encoder 23, an optical or magnetic rotary encoder is provided at the other end of the lead screw 20 as an alternative to the linear encoder 23. The same function can be realized even if installed. A similar function can be realized even if such a drive mechanism is composed of a linear motor and a linear encoder.

ホルダ7には,鍔部6の押圧面に向き合い且つ直動可能に押子把持検出チップ13と,その先に押子把持検知チップ13の押し込みによって支点101を中心に可動するくの字形の検知レバー102が準備されている。検知レバー102の一端は引っ張りバネ103で検知レバー102が押子把持検出チップ13と接する方向に付勢されており,もう一端側には磁石104が備えられている。このため,押子把持検知チップ13の押し込みによって検知レバー102が回動し,結果として磁石104も同図矢印R方向に移動する仕組みとなっている。また,送液装置1内で,ホルダ7の移動方向に沿って対面するように組み合わせた磁性板磁性板105が延設されており,対面した磁性板105間に感磁素子106が設けられているので,対面する磁性板105を磁石で短絡すると,感磁素子106を磁束が通り,感磁素子106から能動信号が出力するように構成されている。   The holder 7 has a pusher gripping detection chip 13 that faces the pressing surface of the collar 6 and is capable of linear movement, and a dogleg shape that moves around the fulcrum 101 when the pusher gripping detection chip 13 is pushed forward. A lever 102 is prepared. One end of the detection lever 102 is urged by a tension spring 103 in a direction in which the detection lever 102 comes into contact with the pusher grip detection chip 13, and a magnet 104 is provided on the other end side. For this reason, the detection lever 102 is rotated by pushing the pusher gripping detection chip 13, and as a result, the magnet 104 is also moved in the direction of arrow R in the figure. Further, in the liquid feeding device 1, a magnetic plate 105 combined so as to face along the moving direction of the holder 7 is extended, and a magnetosensitive element 106 is provided between the facing magnetic plates 105. Therefore, when the facing magnetic plate 105 is short-circuited with a magnet, a magnetic flux passes through the magnetic sensing element 106 and an active signal is output from the magnetic sensing element 106.

図2は,図1を矢視Vの方向から観た図を示し,以上のような磁石104と磁性板105と感磁素子106の位置関係を示している。検知レバー102の一端に設けられた磁石104は一例として同図(N)極および(S)極のように着磁されており,磁石104が磁性板105Aおよび105Bに近接すると,磁石の発する磁束が磁性板内105Aから磁性板105Bへ流れ,この結果,感磁素子106を磁束が通るため,その出力端子107には能動信号が現れる。従って,押子5の把持状態に応じて押子把持検知チップ13の押し込み状態が変化し,検知レバー102も回動して磁石104が磁性板105に近接したり離接したりすると押子把持有無の状態を標示する標示信号を生成し,ホルダ7側から無線で送液装置1内の制御回路へ標示信号を伝達する標示信号伝達手段を構成している。   FIG. 2 is a view of FIG. 1 as viewed from the direction of arrow V, and shows the positional relationship among the magnet 104, the magnetic plate 105, and the magnetosensitive element 106 as described above. As an example, the magnet 104 provided at one end of the detection lever 102 is magnetized like the (N) pole and (S) pole in the figure, and when the magnet 104 is close to the magnetic plates 105A and 105B, the magnetic flux generated by the magnet is generated. Flows from the magnetic plate 105 </ b> A to the magnetic plate 105 </ b> B. As a result, the magnetic flux passes through the magnetosensitive element 106, and an active signal appears at the output terminal 107. Accordingly, when the push-in state of the pusher grip detection chip 13 changes in accordance with the grip state of the pusher 5 and the detection lever 102 also rotates and the magnet 104 approaches or separates from the magnetic plate 105, the presence or absence of the pusher grip is determined. A sign signal transmitting means for generating a sign signal indicating the state of the mark and wirelessly transmitting the sign signal from the holder 7 side to the control circuit in the liquid delivery apparatus 1 is configured.

容器2の内部に挿入される押子5の接液面側には容器2の内壁に密接するパッキン4が備えられ,フランジ3を支持して押子5の鍔部6を押し込むと,容器2の送液部26に接続された送液経路25から容器2内部の収納された液体が送液される。送液経路25の途中にはクランプ24Aおよび24Bが設けられており,各々内蔵された直動ピン27Aおよび27Bが指令信号に応じて送液経路25を閉塞するように対向して配置されている。尚,クランプ24Aまたはクランプ24Bのいずれかを単なる壁として1個のクランプで同様の目的を達成できることも明白である。   A packing 4 that is in close contact with the inner wall of the container 2 is provided on the liquid contact surface side of the pusher 5 inserted into the container 2. When the flange 6 of the pusher 5 is pushed in while supporting the flange 3, the container 2 The liquid stored in the container 2 is fed from the liquid feeding path 25 connected to the liquid feeding section 26. Clamps 24A and 24B are provided in the middle of the liquid supply path 25, and the linear motion pins 27A and 27B incorporated therein are arranged to face each other so as to close the liquid supply path 25 in response to a command signal. . It is obvious that the same purpose can be achieved with one clamp using either the clamp 24A or the clamp 24B as a simple wall.

図3は,クランプ24Aおよび24Bが能動化されて直動ピン27Aおよび27Bによって送液経路25が閉塞されている状態を示している。この状態で,押子5を押し込んだ場合,容器2内部の液圧は上昇するが送液経路25の閉塞位置から先へは容器2内の液体は流れない。図3に示された閉塞状態で,押子5の鍔部6を把持する過程を図4の(a),(b),(c)に示す。送液装置1の動作開始指令に従って駆動モータ17が回転されると,図4−(a)に示されるようにホルダ7が矢印Mの方向へ移動される。この時,バネ10で閉じる方向へ付勢された鈎状フック8Aおよび8Bの先端部に形成された斜め当接面が予め鍔部6の角に当たるように設計されており,ホルダ7を矢印Mの方向へ更に移動させると図4−(b)で示したように鈎状フック8Aおよび8Bは斜め当接面の効果でバネ10の付勢力に抗しながら鍔部6の最大寸法部に乗り上げる。ホルダ7を更に矢印M方向へ移動させると,図4−(c)に示したように,鈎状フック8Aおよび8Bが最終的に鍔部6を乗り越え,鈎状フック8Aおよび8B引っかけ部がバネ10の付勢力で鍔部6を自動的に把持し,送液の準備が完了する。   FIG. 3 shows a state in which the clamps 24A and 24B are activated and the liquid supply path 25 is closed by the linear motion pins 27A and 27B. When the pusher 5 is pushed in this state, the liquid pressure inside the container 2 increases, but the liquid in the container 2 does not flow beyond the closed position of the liquid feeding path 25. FIGS. 4A, 4B, and 4C show a process of gripping the collar portion 6 of the pusher 5 in the closed state shown in FIG. When the drive motor 17 is rotated according to the operation start command of the liquid delivery device 1, the holder 7 is moved in the direction of arrow M as shown in FIG. At this time, the slanting contact surface formed at the front end portion of the hook-like hooks 8A and 8B biased in the closing direction by the spring 10 is designed so as to hit the corner of the hook portion 6 in advance. When further moved in the direction, the hook-like hooks 8A and 8B ride on the maximum dimension part of the hook part 6 while resisting the urging force of the spring 10 by the effect of the oblique contact surface as shown in FIG. . When the holder 7 is further moved in the direction of arrow M, as shown in FIG. 4- (c), hook-like hooks 8A and 8B finally get over the hook part 6, and hook-like hooks 8A and 8B hooking parts are springs. The collar 6 is automatically gripped by the urging force of 10, and preparation for liquid feeding is completed.

ホルダ7に鍔部6の押圧面に向き合い且つ直動可能に押子把持検出チップ13と,その先に押子把持検知チップ13の押し込みによって支点101を中心に可動する検知レバー102が準備されているので,図4−(b)から図4−(c)へ移行する過程で,鍔部6が押子把持検出チップ13を矢印M方向と逆方向へ押し込み,連接する検知レバー102を押し込んで磁石104を磁性板105側へ対向させて感磁素子106に能動信号を出力させる。従って,送液装置1の内部に備えられた制御回路でこの感磁素子106の出力を監視すれば,ホルダ7が鍔部6すなわち押子5を把持したかどうかを検知することが可能である。   The holder 7 is provided with a pusher gripping detection chip 13 that faces the pressing surface of the collar 6 and is capable of linear movement, and a detection lever 102 that is movable around the fulcrum 101 by pressing the pusher gripping detection chip 13 at the tip. Therefore, in the process of shifting from FIG. 4- (b) to FIG. 4- (c), the flange portion 6 pushes the pusher grip detection chip 13 in the direction opposite to the arrow M direction, and pushes the detecting lever 102 connected thereto. The magnet 104 is opposed to the magnetic plate 105 side, and an active signal is output to the magnetosensitive element 106. Therefore, if the output of the magnetic sensing element 106 is monitored by a control circuit provided inside the liquid feeding device 1, it is possible to detect whether the holder 7 has gripped the collar 6 or the pusher 5. .

このようにして押子5を自動的に把持した後は,所定のシーケンスに従って送液が実行されるが,送液完了後は,空となった容器2を交換し且つホルダを所定の位置へ引き戻す作業を迅速に行う必要があるが,このような要求には手動で操作を行った方が好都合の場合が多い。従って本発明の把持機構では,図5に示すように手動式の解放手段を備えている。同図で,操作者が手で解放ボタン11を矢印Pの方向へ押し込むと,鈎状フック8Aおよび8Bの後端と接する解放ボタン11内部壁の斜め当接面が矢印P方向へ移動し,バネ10の付勢力に抗して鈎状フック8Aおよび8Bの後端相互の距離を縮める動きを生じさせるので,鈎状フック8Aおよび8Bの先端部は回動支点9Aおよび9Bを支点として回動し,鍔部6の把持を解放することになる。この時,前述のように解放ボタン11を押すとクラッチ機構が作動してキャリッジ21に内包されたナットとリードスクリュウ20の噛み合いが解放されてホルダ7は手動で移動可能となる仕組みとなっていることから,解放ボタン11を矢印P方向へ押し込んだ状態でホルダ7を矢印P方向と逆方向へ移動すると,鍔部6の把持解放と同時にホルダ7を送液開始時の位置側へ素早く移動させることが可能である。   After the pusher 5 is automatically gripped in this way, liquid feeding is executed in accordance with a predetermined sequence. After the liquid feeding is completed, the empty container 2 is replaced and the holder is moved to a predetermined position. Although it is necessary to perform the pull-back operation quickly, it is often more convenient to perform manual operation for such a request. Therefore, the gripping mechanism of the present invention is provided with manual release means as shown in FIG. In this figure, when the operator manually pushes the release button 11 in the direction of the arrow P, the oblique contact surface of the inner wall of the release button 11 that contacts the rear ends of the hooks 8A and 8B moves in the direction of the arrow P. Since the movement of reducing the distance between the rear ends of the hook-shaped hooks 8A and 8B against the biasing force of the spring 10 is caused, the front ends of the hook-shaped hooks 8A and 8B rotate about the rotation fulcrums 9A and 9B. As a result, the gripping of the buttocks 6 is released. At this time, as described above, when the release button 11 is pressed, the clutch mechanism is operated to release the engagement between the nut contained in the carriage 21 and the lead screw 20, and the holder 7 can be moved manually. Therefore, if the holder 7 is moved in the direction opposite to the arrow P direction while the release button 11 is pushed in the direction of the arrow P, the holder 7 is quickly moved toward the position at the start of liquid feeding simultaneously with the release of the gripping portion 6. It is possible.

図6は,本発明の把持機構を搭載した送液装置の制御に用いられる制御回路の一例として,その主要部のみをブロック図で示している。601はマイクロプロセッサ,602は操作・表示パネル,603は初期設定入力回路,604は警報用のブザー,605は異常表示の赤色灯,617はモータ駆動回路,622はキャリッジ21の位置情報処理回路,624Aおよび624Bはそれぞれクランプ24Aおよび24Bのクランプ駆動回路を示している。   FIG. 6 is a block diagram showing only the main part as an example of a control circuit used for controlling a liquid delivery device equipped with the gripping mechanism of the present invention. 601 is a microprocessor, 602 is an operation / display panel, 603 is an initial setting input circuit, 604 is an alarm buzzer, 605 is an abnormal display red light, 617 is a motor drive circuit, 622 is a position information processing circuit of the carriage 21, Reference numerals 624A and 624B denote clamp drive circuits for the clamps 24A and 24B, respectively.

操作者が送液装置1に対して容器2の装着と送液経路25の準備を終え操作・表示パネル602から送液開始のキー入力が行われると,マイクロプロセッサ601は最初にクランプ駆動回路624Aおよび224Bへクランプ指令を出力し,クランプ24Aおよび24Bによって送液経路25を閉塞状態とする。その後,マイクロプロセッサ601はモータ駆動回路617に回転指令を出力し,駆動モータ17を回転させてキャリッジ21を移動させホルダ7を図4−(a)の矢印M方向へ移動させる。更に図4−(b)および図4−(c)に示した過程の様に,ホルダ7を移動させて押子5の把持を実行する。この間,マイクロプロセッサ601は,押子5の把持状態に応じて変化する感磁素子106の把持検知信号を監視することによって押子5に対する把持状態を把握すると共に,キャリッジ21に備えられた光学式センサ22から生成されるエンコーダ信号信号は位置情報処理回路622を経由して取得し,キャリッジ21の現在位置を正確に把握することが可能となっている。   When the operator finishes mounting the container 2 on the liquid delivery device 1 and prepares the liquid delivery path 25 and performs a liquid entry start key input from the operation / display panel 602, the microprocessor 601 first starts the clamp drive circuit 624A. A clamp command is output to 224B and 224B, and the liquid supply path 25 is closed by the clamps 24A and 24B. Thereafter, the microprocessor 601 outputs a rotation command to the motor drive circuit 617, rotates the drive motor 17, moves the carriage 21, and moves the holder 7 in the direction of arrow M in FIG. Further, as in the process shown in FIGS. 4B and 4C, the holder 7 is moved and the pusher 5 is gripped. During this time, the microprocessor 601 grasps the gripping state of the pusher 5 by monitoring the gripping detection signal of the magnetosensitive element 106 that changes in accordance with the gripping state of the pusher 5, and also uses the optical type provided in the carriage 21. The encoder signal signal generated from the sensor 22 is acquired via the position information processing circuit 622 so that the current position of the carriage 21 can be accurately grasped.

この結果,送液中に押子外れが発生しても,制御回路でその外れを瞬時に検知可能であり,送液を中止すると同時に,医師や看護師へブザー604や赤色灯605で警報を発することで,患者に与える危険を防止することが可能となる。尚,本発明の実施例として,押子5の把持を自動的に実行し,手動で把持を解除する送液装置1を例に説明したが,一般的な手動式送液装置へも適用できることは明白であり,同様の効果を発揮する。   As a result, even if the pusher comes off during liquid feeding, the removal can be detected instantaneously by the control circuit, and at the same time the liquid feeding is stopped, a warning is given to the doctor or nurse with the buzzer 604 or red light 605. It is possible to prevent the danger given to the patient. In addition, as an embodiment of the present invention, the liquid feeding device 1 that automatically executes the gripping of the pusher 5 and manually releases the gripping has been described as an example, but it can also be applied to a general manual liquid feeding device. Is obvious and has a similar effect.

以上のように本発明では,一端に送液部を有する容器に収納された液体を装置に内蔵された制御回路による制御に従って他端側から押子で押し出す送液動作中に押子把持状態を常に監視し,該把持状態の信号を高い信頼性で制御回路へ伝達する手段を備えているので,何らかの理由で押子が把持機構から外れた場合は,装置における医療行為の継続を中止し,医師や看護師など管理者へ異常警報を発することが可能となるので,以して安全な医療用装置を簡素で安価な構成で押子の把持検知装置を提供できるという点でおおいに役立つものである。   As described above, in the present invention, the pusher gripping state is maintained during the liquid feeding operation in which the liquid stored in the container having the liquid feeding part at one end is pushed out by the pusher from the other end side according to the control by the control circuit incorporated in the apparatus. Since there is a means to constantly monitor and transmit the gripping state signal to the control circuit with high reliability, if the pusher is removed from the gripping mechanism for any reason, the medical action in the device is stopped. Since it is possible to issue an abnormality alarm to a manager such as a doctor or nurse, it is very useful in that a safe medical device can be provided with a simple and inexpensive configuration. is there.

予め容器に収納された液体を押子で送液する押し出し式送液装置やシリンジポンプなどの医療用装置などに利用でき,簡素な構成で押子の把持状態を確実に監視して異常時に適切な処置を必要とする用途に適用できる。   It can be used for medical devices such as push-out type liquid feeders and syringe pumps that feed the liquid stored in the container in advance with a pusher. It can be applied to applications that require special treatment.

送液装置に搭載された本発明の把持検知装置の実施方法を示した説明図である。(実施例1)It is explanatory drawing which showed the implementation method of the holding | grip detection apparatus of this invention mounted in the liquid feeding apparatus. Example 1 図1の矢視方向Vから観た磁石と磁性板と感磁素子の相対位置関係を示した説明図である。It is explanatory drawing which showed the relative positional relationship of the magnet seen from the arrow direction V of FIG. クランプによる送液経路の閉塞状態を示した説明図である。It is explanatory drawing which showed the obstruction | occlusion state of the liquid feeding path by a clamp. 本発明の把持検知装置を搭載した送液装置で,押子に対する自動把持過程を示した説明図である。It is explanatory drawing which showed the automatic holding process with respect to a presser with the liquid feeding apparatus carrying the holding | grip detection apparatus of this invention. 本発明の把持検知装置を搭載した送液装置で,押子に対する把持を解放した状態を示した説明図である。It is explanatory drawing which showed the state which released the holding | grip with respect to a pusher with the liquid feeding apparatus carrying the holding | grip detection apparatus of this invention. 本発明の把持検知装置を搭載した送液装置の主要な制御回路をブロック図で示した説明図である。It is explanatory drawing which showed the main control circuits of the liquid feeding apparatus carrying the holding | grip detection apparatus of this invention with the block diagram.

符号の説明Explanation of symbols

1 送液装置
2 容器
5 押子
6 鍔部
7 ホルダ
8A,8B 鈎状フック
10 バネ
11 解放ボタン
13 押子把持検出チップ
14 ガイド棒
17 駆動モータ
20 リードスクリュウ
21 キャリッジ
22 光学式センサ
23 リニアエンコーダ
24 クランプ
102 検知レバー
104 磁石
105 磁性板
106 感磁素子
601 マイクロプロセッサ
604 ブザー
605 赤色灯
DESCRIPTION OF SYMBOLS 1 Liquid supply apparatus 2 Container 5 Pusher 6 Eaves part 7 Holder 8A, 8B Hook hook 10 Spring 11 Release button 13 Pusher grip detection chip 14 Guide rod 17 Drive motor 20 Lead screw 21 Carriage 22 Optical sensor 23 Linear encoder 24 Clamp 102 Detection lever 104 Magnet 105 Magnetic plate 106 Magnetosensitive element 601 Microprocessor 604 Buzzer 605 Red light

Claims (1)

一端に送液部を有する容器に収納された液体を送液装置本体に内蔵された制御回路による制御に従って他端側から押子で押し出す装置において、該押子を把持し前記送液装置本体に対して移動する把持機構による該押子の把持有無に応じた標示信号を磁気的に結合することによって前記制御回路へ伝達する標示信号伝達手段を備え、
該標示信号伝達手段が、前記送液装置本体に配置され前記把持機構の移動方向に沿って延設されると共に該移動方向に直交する方向に対向した対の磁性板と、該両磁性板の対向面間に配置された感磁素子と、前記押子の把持機構に備えられ該把持機構と共に移動することが可能で且つ該対の磁性板に向かって該押子の把持有無に応じて近接離接する磁石とを備え、該磁石の近接離接状態を前記対の磁性板を通して前記感磁素子で磁気的に検出し、電気信号に変換することを特徴とする把持検知装置。
In a device that pushes out liquid stored in a container having a liquid feeding part at one end with a pusher from the other end side in accordance with control by a control circuit built in the liquid feeding device body, the pusher is gripped and attached to the liquid feeding device body comprising an indication signal transmitting means for transmitting an indication signal corresponding to the gripping whether該押Ko by the gripping mechanism to move by that magnetically coupled Previous Stories control circuit for,
A pair of magnetic plates disposed in the liquid feeding device main body and extending along the moving direction of the gripping mechanism and facing the direction orthogonal to the moving direction; and A magnetic sensing element disposed between the opposing surfaces, and provided in the gripping mechanism of the pusher and capable of moving together with the gripping mechanism and approaching the pair of magnetic plates depending on whether or not the pusher is gripped A gripping detection device comprising: a magnet that is separated from or separated from the magnet; and the proximity and separation state of the magnet is magnetically detected by the magnetosensitive element through the pair of magnetic plates and converted into an electric signal.
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TWI417120B (en) * 2011-05-27 2013-12-01 Leader Machine Co Ltd A drug delivery device with built - in quantitative pusher
CA2849486C (en) 2011-09-21 2017-12-12 Bayer Medical Care Inc. Continuous multi-fluid pump device, drive and actuating system, and method
WO2016112163A1 (en) 2015-01-09 2016-07-14 Bayer Healthcare Llc Multiple fluid delivery system with multi-use disposable set and features thereof
JP7029304B2 (en) * 2018-01-31 2022-03-03 ミネベアミツミ株式会社 Syringe pump

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