JP4473092B2 - Clamp - Google Patents

Description

  The present invention relates to a clamp that is used between a closed state in which an intermediate portion of an infusion tube is closed and a released state in which the infusion tube is returned to a standby position to enable infusion.

  Peristaltic infusion pump configured to perform infusion by sequentially pressing the infusion tube with a plurality of fingers, roller-type infusion pump that performs infusion by pressing the infusion tube with a disk equipped with a rotating roller, and syringe piston 2. Description of the Related Art An infusion device such as a syringe-type infusion pump that performs infusion by pressing is known.

  Among these infusion devices, according to the peristaltic infusion pump configured to perform infusion by sequentially pressing the infusion tube with a finger, the door is opened and the intermediate portion of the infusion tube used detachably is infused. After temporarily holding in the groove which is a fixed position on the main body side of the pump, the door is closed, the door is fixed to the main body, and then the outer peripheral surface of the infusion tube is individually driven by the pump mechanism. The infusion tube is held in a stationary state between the finger and the receiving plate of the door, and liquid feeding is performed as the pump mechanism is driven.

  In recent years, there has been a demand for an anti-free flow type infusion device having a function of preventing the residual drug solution in the infusion tube from dropping due to gravity when it is removed.

  The infusion set used in the infusion device is pre-set with a roller type clamp or tube obturator near the puncture needle at the end of the infusion tube. When the nurse removes the infusion tube from the infusion device after the infusion is completed It is obliged to close the tube using a roller type clamp or a tube closing tool.

  However, in recent hospitals and the like, it is fully predicted that the above-mentioned Clemme occlusion will be forgotten due to the introduction of various medical instruments and the lack of skilled nurses. For this reason, safety problems for patients have been pointed out.

Therefore, as the above anti-free flow type infusion device, a clamp used between the closed state in which a part of the infusion tube is blocked in the middle and the released state in which the infusion is returned to the standby position to enable infusion is further set. In addition, by setting the clamp in the clamp loading means on the infusion device side, the infusion state can be automatically released at the time of infusion, and the clamp can be closed again according to the operation of opening the door after the infusion is completed. Possible infusion devices have been proposed. (For example, Patent Document 1)
The applicant of the present application has proposed a clamp and a clamp loading means that can freely attach and detach the infusion tube. (Patent Document 2)
JP-A-5-277186. JP 2004-73822 A.

  However, according to the above-mentioned infusion device proposed by the above-mentioned, it is a configuration in which a nurse or the like directly uses the force when the clamp is taken out of the infusion device together with the infusion tube so that the clamp is again closed. . For this reason, if the occlusion pressure for maintaining the infusion tube in the occlusion state is increased, the force for taking it out of the infusion device is increased. In addition, since the clamp has a simple configuration with a longitudinal groove continuous to the large-diameter hole, for example, the infusion tube located in the longitudinal groove is easily moved by an external force including impact force at the time of dropping, and is in a closed state. Since it is easily released, there is a problem with safety.

  Further, according to the clamp proposed by the latter, there is a case where it does not return to normal due to the effect of permanent distortion when it is taken out from the infusion device and is again closed. Furthermore, since it was possible to easily remove the clamp from the direction perpendicular to the longitudinal direction of the infusion tube, it was found that unexpected troubles occurred as a result of being used for other infusion tubes.

  Therefore, the present invention has been made in view of the above-mentioned problems, the infusion tube can be maintained in a closed state, and the closed state is not released by an external force including an impact force at the time of dropping, and is closed after being loaded into the infusion device. Since the state is released and the infusion is performed, it is in a release state when it is taken out of the infusion device, and when it is returned to the standby state again, it can be reliably closed without causing permanent distortion, and cannot be easily removed. The purpose is to provide a clamp with excellent safety.

To solve the above problems, a clamp for achieving the object, the clamp according to the present invention, which is returned the closed state for closing the middle portion of the infusion tube in the standby position to the release state to enable infusion ( 1) , wherein the clamp (1) forms a main base portion (20) that forms one closed portion that closes the infusion tube, and the other closed portion that closes the infusion tube. The sub-base (34) extended so as to be moved and urged in the releasing direction from the base (20) via the elastic support portion (40) , and the main base and the sub-base are locked to each other. while in the closed state, comprising a locking unit to the released state is returned to the standby position by pressing the pressing surface (41a) located on the inner side than the outer peripheral surface (23), the said engagement The stop (23) is in the main base A first extending portion (22) having a predetermined thickness and extending away from the first elastic support portion (33), and the one obstruction in the first extending portion. A first locking portion (23) formed toward the first portion, a second locking portion (24) formed on each of the both surfaces of the first extending portion, and a second from the sub-base portion. An outer peripheral surface that is moved and biased away from the other closing portion via the elastic support portion and extends into the first extension portion and is smaller than the first extension portion. And a third extension portion (41) formed between the pair of second extension portions (41) having the pressing surface and the pair of second extension portions and engaging with the first engagement portion. And a fourth latch that is formed on the opposing surfaces of the pair of second extending portions and that latches on the second latching portion. (44), and the closed state is maintained by the locking of the first locking portion and the third locking portion, and the first locking is achieved by pressing the pressing surface. Is released from the standby position where the second locking portion and the fourth locking portion are locked, and the released state is maintained. it is characterized in that that.

  In addition, the one closing portion and the other closing portion form guide portions for preventing displacement of the infusion tube at respective end portions, and cross sections of the one closing portion and the other closing portion. The shape is characterized by being formed into an acute angle chevron.

  Moreover, the projection part which controls the bending of the said infusion tube was formed in the said guide part.

  In addition, an insertion guide portion inserted into the clamp loading means is formed by extending in the direction opposite to the first extension portion along the longitudinal direction of the main base portion, and the first extension portion In the present invention, a restricting portion for restricting insertion into the clamp loading means is formed.

  In addition, a reinforcing guide portion that extends in a direction opposite to and perpendicular to the first extending portion along the longitudinal direction of the main base portion and that is inserted into the clamp loading unit is formed.

  In addition, a reinforcing rib extending in the opposite direction from the second elastic support portion along the longitudinal direction of the sub-base portion is further formed.

  A part of the second elastic support part extending the pair of second extending parts is formed in a cylindrical shape, and the first locking part and the first elastic member are pressed by the pressing surface. 3 is released, and is elastically deformed so as to return to the standby position where the second locking portion and the fourth locking portion are locked.

  Further, the pair of second extending portions is characterized in that a gripping portion that is gripped when loading the clamp loading means is formed.

  The main base portion, the sub base portion, and the locking portion are integrally injection-molded from an elastically deformable resin material, and the locking portion is locked so as to be in the standby position after the integral injection molding. It is characterized by.

  According to the clamp of the present invention, the infusion tube can be maintained in a closed state, the closed state is not released by an external force including an impact force at the time of dropping, and the closed state is released after loading into the infusion device and the released state is performed. When the pressure is pressed, permanent deformation does not occur, and when it is taken out from the infusion device, it can be reliably returned to the closed state, and since it cannot be easily removed, a clamp with excellent safety can be provided.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of the invention will be described with reference to the accompanying drawings.

  In the following description, the peristaltic finger method proposed by the applicant of the present invention in Japanese Patent Application Laid-Open No. 9-151856, in which the infusion tube is completely crushed only on the upstream side and the downstream side by each finger, In addition, it is premised on an infusion system that performs accurate liquid feeding by eliminating the influence of the wall thickness of the infusion tube by not completely crushing the blocked part.

  However, the present invention is not limited to this method, and the infusion is performed by a disk having a rotating roller which is a peristaltic finger type infusion pump or another type of infusion device configured to perform peristaltic movement of the infusion tube by being completely crushed. Needless to say, the present invention can also be applied appropriately to an infusion device such as a roller-type infusion pump that performs infusion by pressing a tube.

  FIG. 1 shows a dedicated infusion set 4 prepared by preliminarily setting a dedicated clamp 1 and a general-purpose clamp according to an embodiment of the present invention in a transparent bag after being set in an outlet tube 7 of a drip tube 6 and sealing after sterilization. It is a front view of the general-purpose infusion set 5. In this figure, as shown in the figure, the sets 4 and 5 are partially overlapped so that only the dedicated clamp 1 is shown, but the general-purpose clamp 101 is also set in the same manner.

  Moreover, not only when using both the exclusive infusion set 4 and the general infusion set 5 in which the dedicated clamp 1 and the general-purpose clamp 101 are set, but also when using any one of the sets 4 and 5 in the infusion device. Needless to say, there are also. However, the following description will mainly describe the case where both sets can be used.

  In FIG. 1, the outer dimensions, thickness, material, hardness, etc. are strictly controlled in the transparent bag of the dedicated infusion set 4 so that the accuracy of infusion can be guaranteed when used in a specified infusion device described later. The transparent infusion tube 2 made of a transparent vinyl having a length of about 2 m and an outer shape of about 5 mm, which has been manufactured, is housed in a wound state. A transparent resin drip tube 6 is connected to one end of the dedicated infusion tube 2 and a connector 13 is connected to the other end. The drip tube 6 is connected to a bottle needle 8 shown by a broken line to be punctured into an infusion bag, which will be described later, while a dedicated clamp 1 is set in advance to the outlet tube 7 (shown by a broken line) of the drip tube 6 as shown. Has been.

  The bottle needle 8 is covered with a cap 9 and the connector 13 is covered with a cap 14. The caps 14 are kept in a sterilized state and removed during use, and the puncture needle 15 shown in a broken line enclosed with the connector 13 is capped. It is prepared so that it can be pressed and set after 16 is removed. A roller clamp 10 is set on the upstream side of the connector 13 as seen from the infusion direction described later. The roller clamp 10 is made of a resin having a substantially square cross section, and is rotatably supported by left and right grooves 12 that are partially drilled in the left and right walls after inserting the infusion tube 2 as shown in the figure. 12 is provided. When the roller 12 is rotationally moved from the illustrated position in the direction of the arrow, the distance between the infusion tube 2 and the outer peripheral surface of the roller 12 is narrowed so that the roller 12 can be finally closed. Therefore, the roller clamp 10 is set in the open position after the start of the infusion and set in the closed position after the end of the infusion.

  The above is the contents to be packed in the dedicated infusion set 4, but the general infusion set 5 is also set with substantially the same contents. However, the infusion tube 3 of the general-purpose infusion set 5 is manufactured in a manufacturing process in which the accuracy of infusion cannot be guaranteed, and is used with an infusion detection device that counts the number of infusions in the infusion tube 6 (for example, 1 ml per 15 drops). It is prepared on the premise of doing. Therefore, the general-purpose infusion set 5 is less expensive than the dedicated infusion set 4 because it is cumbersome to connect to the drip detection device. The above is the contents of each set, but in addition to this, when providing an auxiliary band that catches force when hanging near the bottle needle, when installing an air vent filter, when connecting a three-way valve, installing a rubber cap from the syringe There are many sets such as connecting a branch pipe for injecting a chemical solution.

  In each of the above sets, a characteristic point compared with the conventional set is that the dedicated clamp 1 is fixed in a direction perpendicular to the outlet pipe 7 of the infusion tube having an outer diameter larger than that of the infusion tube. This is the point that can move to the tube side. Thus, by setting the dedicated clamp 1 or the general-purpose clamp 101 in advance, it is possible to effectively prevent the movement of the clamps during the conveyance of each set, and to prevent deformation of the infusion tube and the bag. .

  Next, FIG. 2 (a) is a partial view showing a state in which the infusion tubes 2 and 3 are opened at the tube closing portion after the dedicated clamp 1 or the general-purpose clamp 101 after the resin injection molding is put into use. FIG. 7B is an external perspective view showing a part of the state in which the infusion tubes 2 and 3 are closed at the tube closing portion.

  First, in FIG. 2 (a), the clamps 1 and 101 are preferably formed of an integral resin from nylon-based polyacetal resin (Duracon, which is a registered trademark), which is an engineering plastic that can be repeatedly elastically deformed. In addition, the main base portion 20 that forms one closing portion 21 for closing the infusion tubes 2 and 3 and the other closing portion 31 that closes the infusion tubes 2 and 3 are formed, and elastic support is provided from the main base portion 20. A sub-base 34 extending so as to be moved and urged in a natural state in the release direction via the portion 33 is integrally molded as shown in the figure.

  Further, by locking the main base portion 20 and the sub base portion 34, a closed state as shown in FIG. 2B is obtained, and the pressing surface 41a located on the back side of the outer peripheral surface is pressed. The locking portion for returning to the standby position from the state of FIG. 2B and releasing the state is integrally formed.

  Here, the clamps 1 and 101 are not limited to the above-mentioned resin molded products, and the type of resin used is preferably a type that does not generate toxic gas at the time of incineration, and may be metal, thick paper, or a combination thereof. .

  As shown in the figure, a first elastic support portion 33 is integrally formed from a main base portion 20 formed in a plate shape that is not bent in a direction perpendicular to the surface of a predetermined plate thickness 20t. The sub-base 34 is further integrally formed continuously. The first elastic support portion 33 is formed in an arc shape or a curved surface so that it can be elastically deformed in the direction of the plate thickness 33t, and an external force is applied in the direction of arrow F1 in FIG. The other closed portion 31 is moved toward the formed closed portion 21 to close the infusion tubes 2 and 3.

  A first extending portion 22 having both surfaces with a predetermined plate thickness of 20t is continuously formed from the main base portion 20 as shown in the figure. On the other hand, a claw-like first locking portion 23 is formed in the first extending portion 22 toward the one closing portion 21. In addition, second locking portions 24 and 24 formed of an inclined surface and a vertical surface are formed on the upper and lower surfaces of the first extending portion 22.

  Further, the arc-shaped second elastic support portion 40 continuously formed from the sub-base portion 34 is moved and urged so as to be always away from the other closing portion 31 in the natural state. From the end portion of the second elastic support portion 40, the first extending portion 22 is infiltrated in between, and pressing surfaces 41a and 41a are provided on outer peripheral surfaces smaller than the first extending portion 22, respectively. The pair of second extending portions 41 (the upper side is indicated by a two-dot chain line and the lower side is indicated by a broken line) are integrally molded. Further, a third locking portion 43 having an inclined surface and a vertical surface is used for reinforcement between the pair of second extending portions 41, 41 in order to lock the first locking portion 23. Are integrally molded. Further, fourth locking portions 44, 44 that are simultaneously locked to the second locking portions 24, 24 are integrally formed on the opposing surfaces of the pair of second extending portions 41, 41.

  With the above configuration, the sub base 34 is moved by the external force in the direction of the arrow F1, so that the first locking portion 23 and the third locking portion 43 are locked as shown in FIG. Thus, the closed state of the infusion tubes 2 and 3 is maintained.

  On the other hand, by pressing the pressing surfaces 41a and 41a simultaneously in the direction of the arrow F2, the arc-shaped second elastic support portion 40 is moved to the back side. As a result, the third locking portion 43 is moved to the back side, and the locking state with the first locking portion 23 is released. Further, the sub-base portion 34 is returned to the position shown in FIG. 2A by the elastic return force of the first elastic support portion 33 before and after this operation, and the upper and lower second locking portions 24, 24 and the fourth locking portions 44, 44 are returned to the standby position. Thus, the release state of the infusion tubes 2 and 3 is maintained.

  Here, it goes without saying that the arrangement positions and the number of the respective locking portions are not limited to the above and can be set as appropriate.

  Next, FIG. 3A is an external perspective view showing a part of the locking portion of the dedicated clamp 1 in FIG. 2A, and FIG. 3B is a perspective view of the dedicated clamp 1 in FIG. In order to show a state in which the infusion tubes 2 and 3 are closed, a cross-sectional view broken along the longitudinal center surface of the infusion tube, (c) is a cross-sectional view showing a state in which the infusion tube is opened.

  First, in FIG. 3A, components already described are denoted by the same reference numerals and description thereof is omitted. In this figure, the first extending portion 22 is replaced with the upper and lower second extending portions 41, 41 shows a state after resin injection molding before entering the standby position by intruding between 41.

  That is, when the clamps 1 and 101 are molded by resin injection, the clamps 1 and 101 cannot be molded in the locked state. Therefore, the clamps 1 and 101 are taken out from the molding die in the illustrated state, and then set in the standby position as described above. Furthermore, consideration is given to avoiding an under portion as much as possible in the molding die.

  In this figure, the fourth locking portions 44, 44 that are simultaneously locked to the second locking portions 24, 24 are integrally molded in a stepped shape toward the back so as to be substantially orthogonal to the pressing surfaces 41a, 41a. ing. Further, a restricting portion 25 for restricting excessive insertion into a clamp loading means described later in the first extending portion 22 is integrally formed as shown in the figure.

  Next, in FIG. 3B, the cross-sectional shape of the one closing portion 21 and the other closing portion 31 is formed into an acute angle mountain having a predetermined angle in the range of 45 to 90 degrees. When the infusion tubes 2 and 3 are closed, the gap T, which is the distance between the apexes, is not zero, but the thick portions of the infusion tubes are in contact with each other as shown in the figure. ing. Moreover, when it will be in a cancellation | release state, it will move to the position fully opened as shown in FIG.3 (c), and it is comprised so that a chemical | medical solution can be sent downstream.

  The above is the basic configuration and operation of the clamp.

  Next, FIG. 4 (a) is an external perspective view of the dedicated clamp 1 after resin injection molding as viewed from diagonally forward, and FIG. 4 (b) is an external perspective view of the dedicated clamp 1 as viewed diagonally from the rear. 5A is a front view of the dedicated clamp 1 after resin injection molding, and FIG. 5B is a front view of the general-purpose clamp 101 after resin injection molding.

  In FIG. 4 and FIG. 5 (a), components that have already been described are denoted by the same reference numerals and description thereof is omitted, and guide portions 38 for preventing displacement of the infusion tube from the closed portions 21 and 31 are omitted. , 35 and 28 are formed at respective end portions. Further, the guide portions 38, 35, 28 are formed with protrusions 29, 36 on the upper and lower surfaces for restricting the bending of the infusion tube, respectively. Further, an insertion guide portion 26 to be inserted into the clamp loading means is formed along the longitudinal direction of the main base portion 20 so as to be opposite to the first extension portion 22. The detection piece which is the first concave portion 26a having a small valley shape is formed with a chamfered shape at the tip.

  Further, a reinforcing guide portion 30 is formed along the longitudinal direction of the main base portion 20 so as to be opposite to and perpendicular to the first extending portion 22. A reinforcing rib 37 is formed in the opposite direction from the second elastic support portion 40 along the longitudinal direction of the sub-base portion 34.

  The reinforcing guide portion 30 is formed as a wall orthogonal to the plate-like main base portion 20 and functions as a guide member for reinforcement and loading to a clamp loading means described later. Further, the reinforcing rib 37 is configured to achieve the function of reinforcing the sub-base portion 34 and the sliding contact surface of the rotating arm member described later.

  Next, in the general-purpose clamp 101 of FIG. 5B, the insertion guide portion 27 in which the second concave portion 27 a serving as a detection piece is greatly different from the dedicated clamp 1 is 1.5 mm longer than the entire length of the dedicated clamp 1. It is formed as follows. Moreover, the guide part 38 and the protrusion part 29 formed in this guide part 38 are formed so that it may become large. Further, it is prepared by resin injection molding so as to have the actual dimensions shown in the dimensions (mm) in the figure.

  Next, FIG. 6 (a) is a left side view after the exclusive clamp 1 after resin injection molding is locked in a standby position, and (b) is a right side view, and (c) is a standby state. It is a top view before moving to a position.

  In this figure, components that have already been described are denoted by the same reference numerals and description thereof is omitted. In FIGS. 6 (a) and 6 (b), the protrusions 29 and 29 and the protrusion 36 are sub-bases having a width dimension of 4 mm. It is more prominent. Further, the first extending portion 22 is in a state of entering between the pair of left and right second extending portions 41, 41. The width dimension of the second elastic support portion 40 is 7 mm.

  Subsequently, in FIG. 6C, the distance between the apexes of the second locking portions 24, 24 is 3.8 mm, and the fourth engagement formed on the inner surface of the second extending portions 41, 41 is performed. The distance between the stop portions 44 and 44 is set to be larger by 0.5 mm than the distance between 3.3 mm, and is elastically deformed so that the space between the fourth locking portions 44 and 44 is widened when moving to the standby position. It is comprised so that it can be in the latching state shown by 2. FIG.

  7A is a cross-sectional view taken along line XX in the dedicated clamp 1 after resin injection molding in FIG. 6A, and FIG. 7B is a plan view after the general-purpose clamp 101 is in use. (C) is sectional drawing after making the general purpose clamp 101 into the obstruction | occlusion state which obstruct | occludes an infusion tube.

  In this figure, components that have already been described are given the same reference numerals and description thereof is omitted. In FIG. 7A, the first guide portion 28 is formed to overlap the second guide portion 35. Yes. 7B, the general-purpose clamp 101 holds the general-purpose infusion tube 3 in a released state between the closed portions 21 and 31, and then the first locking portion 23 as shown in FIG. 7C. If the 3rd latching | locking part 43 is latched, the general purpose infusion tube 3 shown with the broken line will be obstruct | occluded. In order to release this locking state, the locking between the first locking portion and the third locking portion is released by pressing the pressing surfaces 41a of the pair of second extending portions 41, 41. Thus, the second locking portion and the fourth locking portion are returned to the standby position where they are locked.

  As described above, each of the clamps 1 and 101 has a locking portion locked so as to be in a standby position after being integrally injection-molded from an elastically deformable resin material. It is preferable that resin is molded in a different color, with 1 being white and the general-purpose clamp 101 being orange.

  8A is an external perspective view in which the dedicated clamp 1 is closed to close the infusion tube, FIG. 8B is a cross-sectional view shown for comparison, and FIG. 8C is an XX line in FIG. It is arrow sectional drawing.

  First, in FIG. 8A, components that have already been described are denoted by the same reference numerals and description thereof is omitted, and an RFID (IC tag) 45 is fixed to the insertion guide portion 26 serving as a detection piece by bonding or the like. Has been. The tag 45 may be detected in place of the recess. In addition, since the pair of second extending portions 41 and 41 become gripped portions when loaded into the clamp loading means, a gripped portion in which an insertion arrow is three-dimensionally formed is integrally molded.

  Next, when the infusion tubes 2 and 3 in the closed state in FIG. 8B are gripped from the top and bottom with the fingertips in the oblique direction of the loading direction, the infusion tubes move in the front-rear direction, and are blocked at the blocking portions 21 and 31. It was confirmed that looseness occurred in the condition and liquid leakage occurred.

  On the other hand, when the projections 29 and 29 and the projections 36 and 36 are provided as shown in FIG. 8C, the infusion tubes 2 and 3 are tilted from above and below with the fingertips as shown. It was confirmed that even when gripped, the state orthogonal to the closed portions 21 and 31 can be maintained, so that the closed state does not loosen and the occurrence of liquid leakage can be prevented.

  FIG. 9A is a chart showing the result of the occlusion test of the dedicated clamp 1, and FIG. 9B is a chart showing the result of the occlusion test of the general-purpose clamp 101.

  From this chart, the dedicated clamp 1 has a low temperature of 5 degrees Celsius, which makes it difficult to maintain the closed state due to the hardening of the infusion tube when the gap between the closed portions 21 and 31 is grasped with a fingertip when the gap between the closed portions 21 and 31 is 0.88 to 0.60 mm. It was confirmed that no leakage occurred even when the pressure was held in an oblique direction under the condition of a pressure of 20 kPascal.

  Further, in the test after being removed after being set in the infusion device of condition A, the gap between the blocking portions 21 and 31 does not leak in the range of 0.92 to 0.75 mm, and the door after being completely loaded into the infusion device of condition B When the leakage test was conducted after opening the door again and taking out the door, it was confirmed that the gap between the closed portions 21 and 31 did not leak in the range of 0.92 to 0.71 mm.

  On the other hand, in the general-purpose clamp 101, when the gap between the blocking portions 21 and 31 is gripped with a fingertip in the range of 0.77 to 0.57 mm, no leakage occurs when gripped in an oblique direction under the condition of 20 kPascal at 5 degrees Celsius. It was confirmed that no occurrence occurred.

  Further, in the test after being removed after being set in the infusion device of Condition A, the gap between the blocking portions 21 and 31 does not leak in the range of 0.81 to 0.62 mm, and the door after being completely loaded into the infusion device of Condition B When the leak test was conducted after closing the door and opening the door again, it was confirmed that the gap between the closed portions 21 and 31 did not leak in the range of 0.81 to 0.57 mm. From the above test results, it was confirmed that even when a nurse or the like unexpectedly grips it obliquely, it can be prevented from leaking.

  FIG. 10 is an operation explanatory view showing a state in which the dedicated clamp 1 and the general-purpose clamp 101 in a closed state for closing the infusion tubes 2 and 3 are dropped on the floor. In this figure, when the clamp touches the hatched floor surface or a part of the body of the nurse with an impact force, the first extending portion 22 comes into contact with the pressing surface 41a of the second extending portion 41. It becomes a state.

  Therefore, there is no possibility that the closed state of the infusion tube is released even when it is dropped unexpectedly or when it is handled violently. In this way, every effort is made to ensure safety.

  Next, FIG. 11 is a front view showing a state in which the infusion tubes 2 and 3 are loaded in the infusion device 200 and the door 204 is closed. The figure shows a state in which the infusion can be started by operating the door lock lever 207 after the door 204 is closed after the intermediate portion of the infusion tubes 2 and 3 is set as shown.

  In this figure, an operation switch panel provided on the front side of the door 204 of the infusion device 200 is shown. The infusion tubes 2 and 3 are taken out of the set described in FIG. 1 and connected to the uppermost stream side by piercing a bottle needle into an infusion bag 46 storing a predetermined drug solution. Is set in the infusion device 200 as shown. In addition, a medical solution is injected by inserting a puncture needle 15 of a venous needle connected through a roller clamp 10 further downstream of the infusion tube 2 into a patient's vein.

  The roller clamp 10 performs the same function as the clamps 1 and 101, but the clamps 1 and 101 are necessary because they are often forgotten to be blocked. The infusion bag 46 is suspended from a stand pole (not shown), while the drip tube 6 is set on a drip tube sensor 47 that counts when the optical axis is blocked by drip. In particular, when the general-purpose infusion tube 3 is used, it is essential to perform counting. After the above setting, for example, a highly accurate infusion for a patient lying on a bed is performed.

  In addition, the display section is a display in which the so-called 7-segment number display section is all “8”, which indicates that numerical values, errors, “−”, and the like are displayed. On the other hand, while becoming the base of the main body of the infusion device 200, the main body base on which the shape portion of the outer peripheral edge of the main body is formed is made of aluminum die cast or a resin having rigidity, while ensuring the necessary strength and accuracy. A door 204 is provided that can be opened and closed with the left side edge of the main body base as a center of rotation, and an operation switch and a display unit are disposed on the front surface of the door 204 as shown in the figure to achieve miniaturization. That is, a key panel unit 209 on which operation switches are arranged and a display unit 208 are roughly divided in the vertical direction by frame printing. The key panel unit 209 and the display unit 208 are resin films on which predetermined items are printed on the back surface of the transparent resin film, and are processed so as to protrude forward in a circular shape by embossing. It is adhered and fixed so as to cover the inside of the apparatus, preventing chemicals and the like from entering the inside of the apparatus.

  The switch keys are mounted on a common substrate, and the LEDs of the display unit 208 are self-luminous so that the display can be easily seen at night. Each switch key, the display device, and the lamps are connected to a control unit, which will be described later, via a flexible cable, and a power supply, a drive signal, and the like are transmitted from the cable. In this manner, the power supply and signal transmission associated with the opening / closing operation of the door 204 provided with the door decorative cover can be performed without any trouble. The key panel unit 209 and the display unit 208 provided on the door 204 handle only TTL level electric signals.

  Next, the function of each switch will be described. The power switch 215 disposed in the lower left corner of the figure is used when the main power is turned on / off, and is kept pressed for a predetermined time (approximately 2 seconds or more). The power is turned on, and it is controlled to turn off the power by pressing again for a predetermined second (about 3 seconds or more), and it is unexpected that the power cannot be turned on and off inadvertently. We are trying to prevent accidents. The battery lamp 216 on the right side is provided with a green light-emitting diode that is displayed in three stages as shown in the figure, and lights up when an AC or dedicated DC power source is connected regardless of whether the power source is on or off. The charging is informed, and the charging amount is displayed during charging, and the remaining amount is displayed by LEDs at three levels when the built-in battery is used.

  Above the battery lamp 216, there is provided an AC / DC lamp 217 that is always lit only when the power is on when a commercial power source or a DC power source is used. On top of this, a built-in buzzer sounds when pressed during infusion, and a stop / mute switch 218 for forcibly stopping the infusion is provided. This stop / mute switch 218 can be muted by pressing it while the alarm sound is sounding, and “standby mode” when the infusion preparation is ready and can be started for a predetermined time (about 2 seconds or more). Thus, the alarm state that warns about forgetting to start is released. For this reason, for example, when waiting in the operating room in a state where the puncture needle to the patient is completed, it is possible to prevent an alarm from being generated during the time until infusion starts. On the left side of the stop mute switch 218, a stop display lamp 221 is provided so as to be associated with the stop mute switch 218 so as to surround the same frame as the stop mute switch 218.

  A start switch 219 is provided on the right side of the stop / mute switch 218. When the start switch 219 is pressed, a built-in buzzer sounds, an infusion operation starts, and the green light emitting diode of the start display lamp 220 blinks. To indicate that it is operating. A fast-forward switch 236 is provided on the left side of the stop / mute switch 218, and while being pressed, liquid feeding is performed faster than the set speed (mL / h). So that they can respond immediately to emergencies.

  Above these switches, an up / down switch 222 as a setting means is moved up and down as shown in the figure so as to correspond to the display digits of the planned flow rate display section 233 positioned below the display section 208. By turning on six switches (not shown) that are arranged in total for three rows, the up and down switches corresponding to the number of digits of the up / down switch 222 are pressed in a stopped state, respectively, and the flow rate and the expected amount It is possible to set. At this time, by pressing the column corresponding to the number of digits of the up / down switch 222, the display changes in units of 0.1 mL / h, 1 mL / h..., And the flow rate setting range is 1.0 to the maximum 500 mL / h. It is programmed to be configurable.

  A general-purpose clamp display in which a built-in lamp is lit when the dedicated clamp 1 is loaded and a built-in lamp is lit when the general-purpose clamp 101 is loaded. A part 238 is also provided.

  Above the scheduled flow rate display unit 233, a planned integrated amount display unit 223 surrounded by separate frame printing is disposed as shown in the figure. The range of this scheduled amount setting can be set in the range of 1 to 9999 mL by pressing the up and down buttons corresponding to the number of digits of the up / down switch 222, so that it can be set in units of 1 mL or set freely. It is programmed and configured to store the set value.

  Moreover, it is programmed to display the infused integrated amount in units of 0.1 mL or 1 mL so that the integrated amount display range is in the range of 0.0 to 9999 mL. These flow rate display units 233 are LED displays, and the integrated amount planned amount display unit 223 is also an LED, so that it can be seen without illumination in a night or dark room.

  In addition, an alarm display unit provided with various alarm characters is disposed above the estimated integrated amount display unit 223 so as to be surrounded by separate frame printing. This alarm display unit displays a completion display unit 224 that blinks the word “complete” and blinks the “occlusion” character when a normal infusion cannot be performed due to the detection of an occlusion abnormality in the infusion tubes 2 and 3. And a door opening that blinks the letters “door” when the door 204 is not completely closed with respect to the main body base 3 and the state is detected by a door switch. A bubble abnormality display unit 228 that displays a flashing display of “bubbles” when a bubble having a predetermined length (10 mm) or more is mixed in the infusion tubes 2 and 3, and a built-in battery A battery abnormality display unit 229 that displays “battery” in a blinking manner when the voltage decreases is provided so as to be surrounded by the same printing frame as shown in the figure. Further, the occlusion detection alarm pressure level of the infusion tube 2 is blocked in which light emitting diodes that display green in three stages of “H” high, “M” middle, and “L” low are arranged in the left-right direction as shown in the figure. A pressure setting display section is provided, and a preset occlusion detection alarm pressure level is always lit and displayed. These light emitting diodes are mounted on the same mounting substrate, and are supplied with power via the flexible cable. In addition, a clamp display unit 237 is provided on the top of the display unit 208 to display the loading of the clamp by turning on the built-in lamp 237a.

  Here, the door base 204a partially indicated by a broken line is made of aluminum die-casting or rigid resin, and forms a curved surface that is a design point between the side surface and the front surface, and is convex on the upper surface. An operation indicator 206 is formed in a protruding manner. A light emitting diode that emits red and green light is built in the operation indicator 206 and is lit according to the operation state. That is, it blinks during liquid feeding and fast-forwarding, and when the standby function is working, red and green blink alternately so that the state where the infusion can be started immediately can be recognized from a distance.

  Next, FIG. 12A is a front view showing a state where the door 204 of the infusion device 200 is opened, and FIG. 12B is an external perspective view of the inclined member 50. In this figure, the door 204 of the infusion device 200 is opened, and the door 204 is shown in an open state until it is substantially flush with the main body base 203 for the sake of explanation. There is a stopper that stops when it is opened. Further, the inclined member 50 is a view seen from obliquely below before being attached to the door 204.

  In FIG. 12 (a), the same reference numerals are given to the components already described, and the description is omitted. The infusion device 200 is special injection molded so that there is no sink or resin flow mark from a predetermined resin material. The main body decorative cover 212 is configured to be fixed so as to cover the four corners of the main body base 203. By removing the main body decorative cover 212, it can be easily brought close to all the internal parts. Considering the simplification of

  On the main body decorative cover 212, a handle 205 is fixed for gripping when carrying. As shown in the drawing, the main body base 203 is integrally formed with a groove 203m formed in the vertical direction at a substantially central portion, and the infusion tubes 2 and 3 are set in the groove 203m.

  Further, a pump mechanism 201 configured to be detachable by removing a total of four screws with a Phillips screwdriver is provided below the groove portion 203m. When the movement of 201a, 201b, 201c, 201d, 201e becomes worse, the pump mechanism 201 is taken out from the main body base 203 and washed with a predetermined detergent to wash away the chemicals and return to normal movement. Yes. For this reason, each finger provided in the pump mechanism 201 is injection-molded from a thermoplastic resin having excellent chemical resistance and chemical properties, such as a polyacetal resin material.

  A pair of jaws 203a projecting forward in the drawing is integrally formed below the main body base 203. When the door 204 provided with the door decorative cover is closed, the upper part of the jaw 203a, which is a convex part. Since the lower side surface of the door decorative cover is positioned on the door, when a shocking external force is applied, the external force is received by the jaw 203a so that the external force is not applied to the door decorative cover and the door 204. Considered.

  In addition, a hook 259 is fixed to the middle right side of the main body base 203, and a locking portion 207 a of a door lock lever 207 that is rotatably provided in the door 204 is locked to the hook 259. Thus, the door 204 is maintained in a fixed state with respect to the main body.

  Further, a door seal rubber 266 made of an elastomer is disposed on the door 204 facing the most upstream side of the groove 203m. When the door 204 is closed, the main body base 203 is located between the shape portion 203j shown in the figure. Thus, the door seal rubber 266 is deformed so as to form a bonded seal surface, thereby preventing a chemical solution or the like from entering the inside. Further, the door seal rubber 266 is fixed while being prevented from falling off by a tube pressing plate 267 fixed to the door 204.

  A bubble sensor 260 is disposed below the shape portion 203j. This bubble sensor 260 detects bubbles mixed in the infusion tubes 2 and 3 having a predetermined length (for example, about 0.08 cc) or more in which the length in the tube is a predetermined length (for example, about 10 mm). When this is done, the subsequent operation is forcibly stopped, and a tube pressing portion 267b is placed on the tube pressing plate 267 on the door side at a position facing the bubble sensor 260 which is the bubble detecting portion. It is integrally formed, and when the door 204 is closed, the infusion tubes 2 and 3 are brought into an immovable state so that accurate bubble detection can be performed.

  A pump mechanism 201 is located below the bubble sensor 260, but a blockage sensor 262 is disposed below the pump mechanism 201, and is disposed on the door 204 so as to be opposed thereto. In addition, the infusion tubes 2 and 3 are held in the front-rear direction of the paper surface together with the gimbal-type closing presser plate 269. The blockage sensor 262 includes a permanent magnet and a pickup for detecting the movement position of the permanent magnet in an analog manner. The permanent magnet is moved in accordance with a change in internal pressure caused by the blockage of the infusion tubes 2 and 3. It is comprised so that the position of may be detected. For this reason, it is necessary for the closing presser plate 269 not to restrict changes in the internal pressure of the infusion tubes 2 and 3 in all directions, so that the illustrated disk can freely move at the end of the spring plate (elastic member). Retained.

  On the other hand, the operating principle of the pump mechanism 201 is to press the attached infusion tube 2 with fingers 201a, 201b, 201c, 201d, 201e, and continuously infuse at a set flow rate per time, A motor rotation signal is generated from information stored in a microcomputer (CPU), the motor is rotated by this rotation signal, the pump is driven, and the flow rate of the infusion is adjusted. Each finger is built in such that each of the first finger, the second finger, the third finger, the fourth finger, and the fifth finger is reciprocally driven in the front-rear direction of the paper surface in the pump base as shown in the drawing. .

  As shown in the figure, the shapes of the first and fourth fingers are different from those of the other second, third, and fifth fingers. That is, the width dimension W1 of the first finger and the fourth finger is set larger than the width dimension W2 of the other fingers. Further, convex portions are formed on the pressing surfaces of the first finger and the fourth finger.

  As described above, the peristallic finger method proposed by the applicant of the present invention in Japanese Patent Application Laid-Open No. 09-151856 can be realized by not making all the fingers have the same shape.

  That is, the infusion tubes 2 and 3 are completely closed only on the upstream side and the downstream side by the convex portions formed on the pressing surfaces of the first finger and the fourth finger, and the other finger second finger and third finger are in the middle part By preventing the crushing from being completely crushed, it is possible to deliver the liquid with high accuracy without the influence of the wall thickness of the infusion tube. In addition, the first finger and the fourth finger are in a state in which the infusion tubes 2 and 3 spread to the left and right when the infusion tube 2 is completely closed, so the width dimension W1 of the first and fourth fingers is the same as that of the other fingers. It is larger than the width dimension W2. The fifth finger 201e is for correcting pulsation.

  Further, in the case of the normal peristaltic motion method, the peristaltic motion of the infusion tube can be performed by completely crushing the infusion tubes 2 and 3 by making all the fingers the same flat as the second finger 201b. It becomes like this.

  Next, the door 204 is configured to open toward the left side with a pair of upper and lower hinge blocks 265 and a broken-line pin 261 with respect to the main body base 203, and includes the display unit 208, the key panel unit 209, and the like described above. The operation indicator 206 is energized with a flexible cable 263 that is resistant to repeated bending. A back plate mechanism 230 that is a pressing plate is disposed at a substantially central portion of the door 204 so as to face the pump mechanism 201.

  The back plate mechanism 230 is provided so as to face each finger of the pump mechanism 201 to form a receiving surface for pressing action by the finger, but is provided so as to move in the front-rear direction of the paper surface. In addition, it has a function of preventing damage to the infusion tubes 2 and 3 by retreating toward the back side of the paper surface when some overload occurs. Further, the first finger and the fourth finger completely press-close the infusion tubes 2 and 3, so that the back plate member 231 and the back plate base 232 are opposed to the front and rear surfaces of the paper so as to face these fingers. It is provided to move in the direction.

  On the other hand, a movable infusion tube closing piece 51 and a fixed infusion tube closing piece 52 constituting an infusion tube closing mechanism are provided below the closing sensor 262, and the infusion tube closing release member 55 moves when the door 204 is closed. By doing so, it is provided to move to the illustrated release position.

  A rotating arm member 53 of clamp loading means is provided below the movable infusion tube closing piece 51 to form the other opening guide portion when loading the clamp. Further, a guide member 54 is fixed below the fixed infusion tube closing piece 52, and one opening guide portion at the time of loading the clamp is provided. A lower guide 56 is fixed below the rotating arm member 53.

  On the back of the infusion device 200, an external communication connection connector (not shown), a fuse holder, an AC power connector (receptacle), a history switch mounted on a main mounting board (not shown), a DC connector, and the like are provided through an opening. It is configured to go outside.

  12B, the inclined member 50 fixed to the inner lower side of the door 204 of the infusion device 200 is fixed to the inner surface of the door 204 with a screw, and a sliding contact surface 53f of the rotating arm member 53 described later. A first inclined surface 50c for pressing the first inclined surface 50c, a second inclined surface 50a for pressing the pressing surfaces of the clamps 1 and 101, a groove portion 50b into which the first extending portion 22 enters, and the second inclined surface 50a. The third inclined surface 50d that forms the valley portion by being disposed opposite to each other is integrally molded into a shape as shown in the figure using, for example, a polyacetal resin that is a predetermined resin material.

  Next, FIG. 13 is a cross-sectional view of a main part showing a state in which the infusion tubes 2 and 3 are loaded into the infusion device 200 and the door 204 is closed. In this figure, components that have already been described are denoted by the same reference numerals and description thereof is omitted, and the main body base 203 has a shape portion 203t for detachably housing the pump mechanism 201 shown by broken lines in the drawing. It is integrally formed with the jaw 203a.

  The jaw 203a is shaped to be slightly higher than the door 204 and protects the door 204. The main body base 203 serves as an attachment base for each member, and an upper plate, which is an upper plate member made of aluminum die cast, is fixed as shown in the drawing to form an upper frame portion of the apparatus. In addition, a back plate, which is a back member processed from an iron plate having a thickness of about 1 to 2 mm, is fixed to the back portion of the top plate with two screws at a mounting portion provided with a screw hole of the top plate. A back frame portion on the back side of the apparatus is formed. Further, a lower plate, which is a lower plate member, is fixed between the lower portion of the main body base 203 and the back plate with a screw to form a bottom frame portion of the apparatus. Thus, a solid body frame having a sturdy structure is formed by the main body base 203, the upper plate, the back plate, and the lower plate. Alternatively, the upper plate, the back plate, the lower plate, and the battery case 241 may be integrally formed.

  As described above, sufficient rigidity can be obtained by configuring or integrating the built-in mechanism and the substrate with the upper and lower and back plates with reference to the main body base 203 having sufficient strength. As a result, it is possible to protect the mechanism and the circuit board in the event of a fall, and to take into account that this effect can be minimized by blocking electromagnetic waves.

  A bearing block containing a bearing that rotatably supports the camshaft 248 is fixed to the upper and lower surface portions of the shape portion 203t of the main body base 203. A toothed pulley 247 is fixed to a shaft at the upper end of the camshaft 248 with a screw (not shown). Further, a stepping motor 240 is fixed to the upper plate by fixing a toothed pulley 241 having a smaller diameter or the same size as the above-mentioned toothed pulley 247 on the output shaft with a screw (not shown). The rotational force of the stepping motor 240 is transmitted to the camshaft 248 by the toothed belt 242. Also, the flange of each pulley is provided only on one side as shown so that the stepping motor 240 can be attached and detached when the toothed belt is assembled or replaced.

  In addition, an eccentric cam-shaped portion corresponding to each of the above fingers is integrally processed by a computer-controlled processing device on the outer peripheral surface of the camshaft 248 while ensuring accuracy. Since this camshaft 248 has high accuracy, if an infusion tube with good dimensional accuracy is used, for example, a flow rate accuracy within ± 5% can be guaranteed. This integrated camshaft 248 is machined from stainless steel such as SUS304. Further, the rotation detection sensor 246 is provided so as to read the rotational position and the rotational speed of the camshaft 248 by optically reading a timing disk (not shown) attached to the upper surface of the toothed pulley 247. For this purpose, the rotation detection sensor 246 is fixed to a mounting portion integrally formed on the upper plate.

  The back plate is disposed behind the motor 240 as shown, and serves as a mounting base for the back substrate on which a power connector and the like are mounted. Further, the battery unit is arranged below the motor 240 so that the battery can be exchanged through an opening formed in the lower plate. For this purpose, a back cover (not shown) for closing the bottom of the main body decorative cover is provided so as to be screwed to the lower plate. A fixing screw hole member for fixing the entire apparatus to the stand is fixed to the back cover.

  In addition, after the pump mechanism 201 is fixed to the shape portion 203t with four screws, a small radial bearing of a finger, which will be described later, is in contact with the cam surface of the camshaft. . In addition, the upper plate is shaped to escape the toothed pulley, so that the upper plate can be fixed with the camshaft fixed, so that it can be fixed even after the camshaft is assembled during assembly. This prevents inconsistencies in order. The battery unit has a shape as illustrated and is fixed to the lower plate. On the other hand, the flexible cable 263 extends from a main mounting substrate (not shown) and is configured to appear through the opening of the main body base 203.

  In addition, the main mounting board that stores programs and performs predetermined control is provided with a plurality of connectors arranged so as to face upward, and the upper edge is fixed to the side surface of the upper plate by screws. To do. In addition, this main mounting board is designed to be strong against external noise by setting a wide grounding pattern and considering the mounting pattern of each electronic component, and many devices that generate noise are used. It can be used in the operating room.

  Next, FIG. 14A is an external perspective view of the state before the dedicated clamp 1 and the general-purpose clamp 101 are loaded into the clamp loading mechanism, as viewed obliquely from the front, and FIG. 14B is a front view of the clamp loading mechanism after loading. It is the external appearance perspective view seen from diagonally upward.

  In this figure, components that have already been described are denoted by the same reference numerals and description thereof is omitted. A guide member 54 serving as one opening guide portion is provided with a reinforcing guide integrally formed with the main base portion of the clamps 1 and 101. An opening groove portion 54a having a shape and an internal dimension matching the portion 30 is formed as shown in the figure. Further, a central groove portion 54b is formed at the center of the opening groove portion 54a, and the restriction portion 25 formed in the first extension portion 22 after the main base portion is infiltrated is positioned on the surface 54f of the guide member 54. So that it cannot be pushed any further.

  Further, the rotating arm member 53 is formed with a crest that is slidably contacted and abutted on the outer peripheral surface of the second elastic support portion 40 so as to obtain a click feeling when the clamp is inserted. The lower member 56 and the guide member 54 are prepared as resin-molded parts from the same color resin, and are fixed below the movable infusion tube closing piece 51 and the fixed infusion tube closing piece 52 constituting the infusion tube closing mechanism as shown in the figure. Is done.

  FIG. 15 is an external perspective view of a state in which the infusion tubes 2 and 3 are closed using the dedicated clamp 1 and the general-purpose clamp 101 and then loaded into the infusion device 200 as viewed obliquely from above. FIG. 16 shows an operation manual 57 provided on the side surface of the infusion device 200.

  In both figures, the same reference numerals are given to components that have already been described, and the description is omitted. The clamps 1 and 101 are removed from the outlet tube of the drip tube 6 and moved below the infusion tubes 2 and 3 to be blocked. Set to state.

  The door 204 of the infusion device 200 is open, and is set while viewing the manual 57 in FIG. That is, the door 204 is opened, the tube closing mechanism is released, the infusion tubes 2 and 3 are set in the groove 203m and the groove of the red colored tube guide 268 below the infusion mechanism 201, and either the clamp 1 or 101 is clamped. The insertion guide portion is first inserted between the guide member 54 and the turning arm member 53 of the loading means. Subsequently, when the door 204 is closed and fixed to the main body by operating the lever 207, the closed state is released and the release state is set, and preparation for infusion start is completed.

  As described above, when the clamps 1 and 101 are dropped in the closed state, the closed state does not come off due to the impact force, and the clamp is released from the state shown in FIG. Since it can move to the state shown in a) in an instant, each locking portion no longer returns due to permanent strain. That is, when the door 204 is closed and the blockage is released, the clamp is changed to a shape that does not cause permanent deformation of the clamp, and the anti-free flow mechanism of the door-linked clamp loading mechanism is obtained. In addition, since the use of the dedicated infusion set and the general infusion set is considered, both the infusion set and the general infusion set can be used, and the detection result is displayed on the operation panel.

  In addition, in the case of a dedicated infusion set that guarantees infusion accuracy of 10%, it can be used as it is attached to the infusion pump, but when using a general-purpose infusion set, tube accuracy is not guaranteed, so an optical drop counter can be used. For example, an infusion set changeover switch may be provided in which a drip tube sensor 47 detects, for example, 15, 20, or 60 drops as 1 ml and uses the number of drops set. This is done by automatic detection of the IC tag, barcode, etc.

  Further, since the reinforcing guide portion 30 which is a wall portion for preventing the back piercing of the clamps 1 and 101 is provided, erroneous insertion can be prevented. Furthermore, since the restriction part 25 which is a step part which becomes a clue at the time of setting a clamp to a clamp loading means is provided in the clamp, it becomes a standard at the time of setting. However, the click feeling at the time of setting was obtained when getting over the crest of the rotating arm member. Furthermore, when the nurse grasps the clamp and the tube at the same time when the tube is removed, the tube may bend and the blockage may be released to cause a leak, which is also prevented by the protrusion. In addition, the clamps 1 and 101 are included in both the exclusive infusion set and the general-purpose infusion set, and the clamp is used as a single-use type in which the clamp is shaped to prevent attachment / detachment. This prevents backflow when loaded in the reverse direction. The clamps of the dedicated infusion set and general infusion set are color-coded (white and orange) for easy identification.

  Next, as for the clamp loading mechanism, a three-dimensional exploded view of the clamp loading mechanism of FIG. 17 as viewed from below and a clamp loading mechanism before loading of the dedicated clamp 1 or the general-purpose clamp 101 of FIG. A bottom view, a bottom view schematically showing a state after the dedicated clamp 1 of FIG. 18B is loaded into the clamp loading mechanism, and a state after the universal clamp 101 of FIG. 18C is loaded into the clamp loading mechanism This will be described with reference to a bottom view schematically showing the state.

  The function of this clamp loading mechanism is that the inclined member 50 fixed to the lower side inside the door 204 of the infusion device 200 described with reference to FIG. The contact surface 53f is pressed by the first inclined surface 50c of the inclined member 50, and one of the pressing surfaces 41a of the clamps 1 and 101 is simultaneously pressed by the second inclined surface 50a so as to be in a closed state and a released state. 1 and a second function for detecting the loading state of the dedicated clamp 1 and the general-purpose clamp 101.

  Here, the configuration to be described later is merely an example, and it goes without saying that the mechanism is appropriately changed according to the shape and size of the clamps 1 and 101, and individual mechanisms for realizing the first function and the second function described above. When configured as a dedicated clamp loading mechanism for the dedicated clamp 1 or the general-purpose clamp 101, the loading state may be detected optically or by RF coupling using an IC tag.

  In FIG. 17, an opening for inserting and removing the clamps 1 and 101 is formed between the guide member 54 illustrated with reference to the broken line described with reference to FIG. 14 and the rotating arm member 53. A base 58 fixed to the main body 203 of the infusion device 200 is pressed into a shape shown in the figure from a stainless plate having a thickness of 1 to 1.5 mm, and a lateral protrusion is formed on the base 58 as shown in the figure. To the body, a first bent portion 58a, a second bent portion 58c forming a stopper, a third bent portion 58d continuous from the guide member 54, a fourth bent portion 58k for fixing the sensor substrate 68, and the main body. A mounting hole 58g for fixing with a screw and a hole 58f for fixing one end of the torsion spring 65 are pressed.

  Further, a large stud shaft body 59 having a groove portion for fitting the retaining ring 62 and a small stud shaft body 61 having a groove portion for fitting the retaining ring 62 are press-fitted and fixed to the base 58 in the vertical direction. ing.

  The rotating arm member 53 is prepared by integrally resin molding from, for example, PPS resin so as to have the shape shown in the figure from a resin material. The rotating arm member 53 has a through-hole 53a inserted into the stud shaft body 59 at one end, the sliding contact surface 53f and the mountain 53b at the other end, and further to the right side of the drawing. A main body 53k (partially shown by a broken line) having a slidable contact surface 53d formed on the surface, and an extended portion 53m extending from the main body 53k and having a protruding portion 53g formed on the inner surface, are in sliding contact with the base 58. A sliding contact projection 53s shown by a broken line is integrally formed on the back surface of the main body 53k. After the rotating arm member 53 is inserted into the stud shaft body 59 of the base 58 with the through-hole portion 53a, the retaining ring 62 is set and prevented from coming off and is pivotally supported.

  The compression coil spring 60 is lightly compressed and set in a natural state so that the end portions 60a and 60b are inserted between the protruding portion 58a of the base 58 and the protruding portion 53g of the rotating arm member 53 and preload is generated. As a result, the sliding contact surface 53d of the main body 53k is completed in a state where it abuts on the second bending portion 58c. As described above, the rotating arm member 53 is rotated counterclockwise around the shaft body 59 against the compressive force of the compression coil spring 60.

  The means for discriminating between the dedicated clamp and the general-purpose clamp can perform non-contact and reliable detection by detecting the IC tag. In the case shown in the figure, a disk 63 rotatably supported around the shaft body 61 of the base 58 is provided, and this disk 63 is rotated by inserting each clamp, and the rotation position is optically detected. It is configured. In this way, it is possible to detect the clamp within a limited volume.

  The disk-shaped disk 63 is made of a black resin that prevents light transmission, and a through hole 63a at the center of rotation, a notch 63b on the outer peripheral surface, a recess 63c, and the other end 65c of the torsion spring 65 are fixed. And a notch 63d. Ends 65b and 65c of this disk 63 are set as shown in the drawing so that the coil portion of the torsion spring 65 is reduced in diameter to generate an elastic force to return to the original state. After insertion, the retaining ring 62 prevents it from being pulled out and is pivotally supported.

  The notch 63b is inserted into the first concave portion 26a of the dedicated clamp 1 or the second concave portion 27a of the general-purpose clamp 101 to transmit the rotational force in the forward and reverse directions. It is rotated to the initial position by the force to return and the force with which the inclined surfaces of the recesses 26a and 27a abut. As a result, even if it is difficult to return due to the chemical solution adhesion, it is possible to surely return to the initial position.

  In addition, the first sensor 67 and the second second sensor 66 that detect the concave portion 63 c as the disk 63 rotates are fixed to the sensor substrate 68 so that the light emitting element and the light receiving element straddle the disk 63. The sensor substrate 68 is fixed to the bent portion 58k of the base 58. In this way, a sensor based on a detection principle such as a magnetic type may be used in addition to the light transmission type optical sensor.

  Next, in FIG. 18, components that have already been described are denoted by the same reference numerals and description thereof is omitted. Before the dedicated clamp 1 or the general-purpose clamp 101 is loaded as shown in FIG. The optical axes of the first sensor 67 and the second second sensor 66 that detect the concave portion 63c of the disk 63 are blocked. The notch 63b stops at a position of about 15 degrees from the parallel axis. The rotating arm member 53 is biased by the compression coil spring 60 so that the sliding contact surface 53d stops at a position orthogonal to the parallel axis.

  From this state, the dedicated clamp 1 or the general-purpose clamp 101 is set in the direction of the arrow between the guide member 54 serving as one opening constituting the opening and the crest 53b of the rotating arm member 53 serving as the other opening. As a result, the state shown in FIG. 18B or the state shown in FIG.

  That is, when the dedicated clamp 1 is loaded into the clamp loading mechanism, the tip of the insertion guide portion 26 of the dedicated clamp 1 abuts against the contact surface 63b-1 of the notch 63b of the disk 63 as shown in FIG. Before and after this, the first concave portion 26a enters the peak portion 63b-2 of the cutout portion 63b, and the disc 63 is stopped by rotating (rotating) around the shaft body 61 by a predetermined angle. Since the optical axis of the sensor 67 is not shielded, the recess 63c is detected. At this time, the peak portion 53b gets over the outer peripheral surface of the second elastic support portion 40 to give a click feeling, and the restricting portion 33a abuts against the stopper member 58c to prevent further insertion.

  On the other hand, in the bottom view schematically showing the state after the general-purpose clamp 101 of FIG. 18C is loaded into the clamp loading mechanism, when the universal clamp 101 is loaded into the clamp loading mechanism, the disk 63 as shown in the figure is shown. The tip of the insertion guide part 27 of the general-purpose clamp 1 hits the contact surface 63b-1 of the notch 63b, and the position of the peak 63b-2 of the notch 63b is deeper in the second recess 27a before and after this. Get into.

  As described above, since the insertion guide portion 27 is longer than in the case of the dedicated clamp, the disk 63 is further stopped at a position rotated by 15 degrees of a predetermined angle, and the optical axis of the second sensor 66 is not shielded. The recess 63c is detected. At this time, similarly, when the mountain portion 53b gets over the outer peripheral surface of the second elastic support portion 40 and gives a click feeling, the restricting portion 25 comes into contact with the guide member 54 and further insertion is prevented.

  During the above loading, the rotating arm member 53 is loaded and unloaded while the clamp reinforcing guide portion 30 is in sliding contact with the sliding contact surface 53d. As a result, the rotating arm member 53 is slightly rotated counterclockwise against the compressive force of the compression coil spring 60 to obtain a hold feeling.

  With respect to the clamp loading mechanism configured as described above, the state before the door 204 of FIG. 19A is opened and the dedicated clamp 1 is loaded into the clamp loading mechanism is viewed from below, and the main body 53k of the rotating arm member 53 is A cross-sectional view shown by cross-hatching and a cross-sectional view showing a state after the exclusive clamp 1 of FIG. 19B is loaded into the clamp loading mechanism will be described.

  In this figure, components that have already been described are denoted by the same reference numerals and description of the operation is omitted. When the door 204 is opened, the first inclined surface 50c and the second inclined surface of the inclined member 50 are opened. 50a and the third inclined surface 50d are retracted greatly as shown. Further, the sliding contact surface 53f of the main body 53 of the rotating arm member 53 is positioned facing the guide member 54, and the infusion tube 2 is closed in the direction of the arrow toward the opening formed therebetween. The dedicated clamp 1 is inserted. At this time, the sliding surface 53d of the rotating arm member 53 is in contact with the reinforcing rib 37 of the clamp 1, so that an appropriate resistance can be obtained. Further, the reinforcing guide portion 30 is set in the guide groove portion of the guide member 54, thereby preventing erroneous insertion in a state where the front and back surfaces are turned over. At this time, the disk 63 is stopped at the same position as shown in FIG.

  Subsequently, in FIG. 19B, when the dedicated clamp 1 is clicked into the clamp loading mechanism and loaded as described above, the same state as shown in FIG. 18B is obtained. As a result, the infusion device 200 is notified by the electrical signal from the sensor 67 that the dedicated clamp 1 has been loaded. Next, the door 204 is closed in the direction of the arrow.

  The door 204 in FIG. 20A is closed and the dedicated clamp 1 and the rotating arm member 53 are pressed by the contact member 50. That is, the pressing surface 41a of the dedicated clamp 1 is pressed in the locking release direction on the back side by the second inclined surface 50a of the inclined member 50 and starts to be released as shown in FIG. At the same time, the sliding contact surface 53f of the rotating arm member 53 is pushed by the first inclined surface 50c of the inclined member 50, thereby rotating counterclockwise as illustrated against the compressive force of the compression coil spring. Is done.

  Subsequently, in FIG. 20B, when the door 204 is further closed and the angle formed with the infusion device is about 1 degree, the pressing surface 41a of the dedicated clamp 1 is further pressed by the second inclined surface 50a. It will be in the state just before unlocking.

  Then, as shown in FIG. 21A, when the door 204 is closed and locked to the end, the dedicated clamp 1 is released, and the infusion tube is released from being blocked. At this time, the pressing surface 41a of the first extending portion 41 falls into the trough portion of the inclined member 50 by an elastic force so that the permanent deformation does not occur due to the instantaneous natural state. Further, since the rotating arm member 53 has already been moved to the standby position as described above, the dedicated base 1 in which the auxiliary base formed with the reinforcing rib 37 is displaced toward the rotating arm member 53 side. Now, infusion is possible.

  As described above, since the action point for applying a load necessary for releasing the clamp is changed, the door 204 can be closed with a light force.

  In this state, infusion by peristaltic movement as described above is performed.

  After the infusion, when the door 204 is unlocked and starts to open as shown in FIG. 21 (b), the rotating arm member 53 has the first inclined surface 50 of the inclined member 50 in contact with the sliding contact surface 53f. The special clamp 1 is started to be pushed rightward by starting to move away from. At this time, the second inclined surface 50a of the inclined member 50 starts to move away from the pressing surface 41a of the first extending portion 41.

  Then, as shown in FIG. 22A, when the door 204 is further opened and the angle is about 8 degrees, the rotating arm member 53 is moved to the pressing position, and the dedicated clamp 1 is brought into the locked state and the infusion tube closed state. Returned. Next, the door 204 is opened as shown in FIG.

  Finally, in the cross-sectional view showing the state where the dedicated clamp 1 is taken out in FIG. 23 (a), the nurse picks up the grip portion of the dedicated clamp 1 from above and pulls it out toward the front side. A feeling can be obtained. Further, when the disk 63 is pulled out, the disk 63 is forcibly rotated as shown in FIG. 23B to return to the original initial position.

  As described above, a clamp for exclusive infusion sets and a clamp for general-purpose infusion sets can be automatically detected, and a notch is provided as a non-detection part that converts parallel movement at the time of clamp loading into rotational movement. Two sensors can be installed side by side, and a disk can be installed at the standby position with a torsion spring. In addition, when pulling out the clamp as described above, the disc is returned to its original position at the notch, so even if it does not return to the torsion spring due to chemical adhesion (and after drying), the disc is forcibly restored. It will return to the position of and can be used without problems at the next use.

  FIG. 24 is a flowchart for explaining the operation for automatic detection of the dedicated clamp 1 or the general-purpose clamp 101. In this figure, a clamp, an infusion tube, etc. are set as described with reference to FIG. 16 in step S1. In the case of a general-purpose infusion set, the infusion tube is set in an infusion device equipped with an infusion inspection probe, and the infusion device is always connected to the infusion device.

  Following this, in step S2, the initialization program is activated by turning on the power supply prediction 215 for 1 second with the door 204 open, and each means is initialized and self-checked. Is generated and subsequent operations are prohibited.

  Subsequently to step S3, the dedicated clamp 1 or the general-purpose clamp 101 is set, and then the door 204 is closed in step S4, so that the clamp is released.

  Subsequently, in step S5, the sensors 66 and 67 detect whether the clamp is the dedicated clamp 1 or the general-purpose clamp 101. If it is determined in step S6 that the clamp is the dedicated clamp 1, the process proceeds to step S7. The display of the clamp 1 is informed by the lighting of the lamp, and the process proceeds to step S8 where the infusion permission is executed and the process ends.

On the other hand, if it is determined in step S6 that the general-purpose clamp 101 is set instead of the dedicated clamp 1, the process proceeds to step S9, the display of the general-purpose clamp 101 is notified by the lighting of the lamp, and the process proceeds to step S10 where the drip detection probe is operated. If it is determined whether it is connected or not, the process proceeds to step S8 to execute infusion permission. If the connection of the drip detection probe is forgotten due to a procedure error in step S10, an alarm is generated in step S11 to prompt connection.

  As described above, according to the present invention, it is possible to provide a clamp that does not require the infusion tube to be inserted in advance and can maintain the closed state for a long time. Moreover, the closed state of the infusion tube by the clamp and the closed state can be made again only by opening and closing the door. Furthermore, it is possible to provide a highly reliable clamp and an infusion device using the clamp, in which the clamp that has been set once is not inadvertently detached from the infusion tube.

A dedicated infusion set 4 and a general infusion prepared by preliminarily setting the dedicated clamp 1 and the general purpose clamp 101 of the embodiment of the present invention in the outlet tube 7 of the infusion tube 6 and then storing them in a transparent bag and sealing them after sterilization. It is a front view of set 5. (A) shows a part of the infusion tubes 2 and 3 in a perspective view in order to show a state in which the infusion tubes 2 and 3 are opened at the tube closing portion after the exclusive clamp 1 or the general-purpose clamp 101 after the resin injection molding is put into a use state. FIG. 5B is an external perspective view showing a part of the state where the infusion tubes 2 and 3 are closed at the tube closing portion. FIG. 2A is an external perspective view partially showing a part of the locking portion of the dedicated clamp 1 in FIG. 2A, and FIG. 2B is an infusion tube 2, 3 by the dedicated clamp 1 in FIG. Sectional drawing which fractured | ruptured and showed along the center plane of the longitudinal direction of an infusion tube in order to show a mode that was closed | closed, (c) is sectional drawing which showed a mode that the infusion tube was open | released. (A) is the external appearance perspective view which looked at the exclusive clamp 1 after resin injection molding from diagonally forward, and (b) is the external perspective view which looked at the exclusive clamp 1 from diagonally upward. (A) is a front view of the exclusive clamp 1 after resin injection molding, (b) is a front view of the general purpose clamp 101 after resin injection molding. (A) is a left side view after putting the dedicated clamp 1 after resin injection molding into a standby position to put it in use, (b) is a right side view, and (c) is a top view. 6A is a sectional view taken along the line XX in the dedicated clamp 1 after resin injection molding in FIG. 6A, FIG. 6B is a plan view after the general-purpose clamp 101 is in use, and FIG. It is sectional drawing after making the clamp 101 into the obstruction | occlusion state which obstruct | occludes an infusion tube. (A) is the external appearance perspective view which made the exclusive clamp 1 the obstruction | occlusion state which obstruct | occludes an infusion tube, (b) is sectional drawing shown for the comparison, (c) is XX arrow line view of Fig.8 (a). It is sectional drawing. (A) is a chart which shows the blockage test result of the exclusive clamp 1, (b) is a chart which shows the blockage test result of the general purpose clamp 101. It is operation | movement explanatory drawing which shows a mode that the exclusive clamp 1 made into the obstruction | occlusion state which obstruct | occludes the infusion tubes 2 and 3 and the general purpose clamp 101 were dropped on the floor. It is the front view which showed the state which loaded the infusion tube 2 and 3 to the infusion apparatus 200, and closed the door 204. FIG. (A) is the front view which showed the state which opened the door 204 of the infusion apparatus 200, (b) is the external appearance perspective view of the inclination member 50. FIG. FIG. 4 is a cross-sectional view of a main part showing a state in which the infusion tubes 2 and 3 are loaded into the infusion device 200 and the door 204 is closed. (A) is an external perspective view of the state before loading the dedicated clamp 1 and the general-purpose clamp 101 into the clamp loading mechanism, as viewed from the front obliquely. (B) is a view of the clamp loading mechanism after loading from the obliquely upward front. It is an external perspective view. It is the external appearance perspective view which looked at a mode that it loaded with the infusion apparatus 200, after making the infusion tube 2 and 3 obstruct | occluded using the exclusive clamp 1 and the general purpose clamp 101. FIG. It is operation explanatory drawing provided in the side surface of the infusion apparatus. It is the three-dimensional exploded view which looked at the clamp loading mechanism from the lower side. (A) is a bottom view schematically showing a clamp loading mechanism before loading the dedicated clamp 1 or the general-purpose clamp 101, and (b) schematically shows a state after the dedicated clamp 1 is loaded into the clamp loading mechanism. A bottom view, (c) is a bottom view schematically showing a state after the general-purpose clamp 1 is loaded into the clamp loading mechanism. (A) is a cross-sectional view illustrating the state before the door 204 is opened and the dedicated clamp 1 is loaded into the clamp loading mechanism from below, and the rotary arm member 53 is shown by cross-hatching. It is sectional drawing which showed the state after loading in the clamp loading mechanism. (A) is sectional drawing which showed the state in which the door 204 was closed and the exclusive clamp 1 and the rotation arm member 53 were pressed by the contact member 50, (b) showed the state in which the door 204 was further closed. It is sectional drawing. (A) is a sectional view showing a state in which the door 204 is closed and locked to the end, the dedicated clamp 1 is released, and the rotating arm member 53 is moved to the standby position, and (b) is the door 204 locked. It is sectional drawing which showed the state which is released and begins to open. (A) is sectional drawing which showed the state in which the door 204 was further opened and the rotation arm member 53 was moved to a press position, (b) is sectional drawing which showed the state in which the door 204 was opened. (A) is sectional drawing which showed the state from which an exclusive clamp is taken out, (b) is the figure which showed the state in which a disk is rotated. 4 is a flowchart for explaining the operation for automatic detection of the dedicated clamp 1 or the general-purpose clamp 101.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dedicated clamp 101 General purpose clamp 2 Dedicated infusion tube 3 Dedicated infusion tube 4 Dedicated infusion set 5 Dedicated infusion set 6 Drip tube 7 Outlet tube 8 Bottle needle 10 Clenme 15 Puncture needle 20 Main base 21 One occlusion 22 First extension Part 23 first locking part 24 second locking part (up and down)
25 Stopper 26 Dedicated detection piece 27 General-purpose detection piece 28 First guide 29 First projection
30 Reinforcing guide portion 33 First elastic support portion (curved)
34 Sub-base 35 Second guide 36 Second protrusion (up and down)
37 Reinforcing rib 38 Third guide 40 Second elastic support (arc shape)
41 Second extending portion 41a Pressed surface (up and down)
43 3rd latching | locking part 44 4th latching | locking part 45 IC tag 47 Infusion tube sensor 50 Inclined member 51 Movable infusion tube obstruction piece (infusion tube obstruction | occlusion mechanism)
52 Fixed Infusion Tube Blocking Piece (Infusion Tube Blocking Mechanism)
53 Rotating arm member (the other opening guide)
54 Guide member (one opening guide)
55 Infusion tube blockage release member 56 Lower guide 57 Operation manual 58 Clamp loading mechanism base 59 Large stud shaft body 60 Compression coil spring 61 Small stud shaft body 62 Retaining ring (E ring)
63 Disc 65 Torsion spring 66 First sensor 67 Second sensor 68 Sensor substrate 200 Infusion device 204 Door

Claims (9)

A clamp (1) that is in a closed state that closes the middle part of the infusion tube and a release state that is returned to the standby position and enables infusion;
The clamp (1)
A main base (20) that forms one occlusion portion that occludes the infusion tube;
A sub-base (34) extending from the main base (20) to be urged to move in the release direction through the elastic support (40) while forming the other closing part for closing the infusion tube. When,
The main base portion and the sub base portion are locked to make the closed state, and the pressing surface (41a) located on the back side of the outer peripheral surface is pressed to return to the standby position and the released state. includes locking portions (23), a to,
The locking portion (23)
A first extending portion (22) extending away from the first elastic support portion (33) in the main base and having both surfaces of a predetermined thickness;
A first locking portion (23) formed toward the one closing portion in the first extending portion;
A second locking portion (24) formed on each of the both surfaces of the first extending portion;
The second base is moved and urged to extend away from the other closing part via the second elastic support part, and the first extension part is infiltrated, and the first extension A pair of second extending portions (41) having the pressing surface on the outer peripheral surface smaller than the mounting portion;
A third locking portion (43) formed between the pair of second extending portions and locked to the first locking portion;
A fourth locking portion (44) that is formed on each of the opposing surfaces of the pair of second extending portions and that is locked to the second locking portion,
The closed state is maintained by the locking of the first locking portion and the third locking portion,
By pressing the pressing surface, the locking between the first locking portion and the third locking portion is released, and the second locking portion and the fourth locking portion are engaged. The clamp is returned to the standby position to be stopped and the released state is maintained . The one closed portion and the other closed portion are formed with guide portions that prevent displacement of the infusion tube at respective end portions, and the cross-sectional shapes of the one closed portion and the other closed portion are The clamp according to claim 1, wherein the clamp is formed in an acute angle chevron. Wherein the guide portion, clamp according to claim 1 or 2, characterized in that the formation of the projecting portion for restricting the bending of the infusion tube. An insertion guide portion to be inserted into the clamp loading means is formed by extending in a direction opposite to the first extension portion along the longitudinal direction of the main base portion, and in the first extension portion, The clamp according to any one of claims 1 to 3 , wherein a restricting portion for restricting insertion into the clamp loading means is formed. 2. A reinforcing guide portion extending in a direction opposite to and perpendicular to the first extending portion along the longitudinal direction of the main base portion and being inserted into the clamp loading means is formed. The clamp of any one of thru | or 4 . The clamp according to any one of claims 1 to 5 , further comprising a reinforcing rib extending in a reverse direction from the second elastic support portion along a longitudinal direction of the sub-base portion. A part of the second elastic support part extending the pair of second extension parts is formed in a cylindrical shape, and the first locking part and the third third part are pressed by the pressing to the pressing surface. engagement of the locking portion is released, according to claim 1, and the second engaging portion and the fourth engagement portion, characterized in that the elastically deformed as returned to the standby position to lock The clamp of any one of thru | or 6 . The clamp according to claim 4 , wherein a grip portion that is gripped when loading the clamp loading means is formed in the pair of second extending portions. The main base, the sub-base, and the locking part are integrally injection-molded from an elastically deformable resin material, and the locking part is locked so as to be in the standby position after the integral injection molding. The clamp according to any one of claims 1 to 8 .

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