WO2014077308A1 - チュービングポンプ - Google Patents
チュービングポンプ Download PDFInfo
- Publication number
- WO2014077308A1 WO2014077308A1 PCT/JP2013/080765 JP2013080765W WO2014077308A1 WO 2014077308 A1 WO2014077308 A1 WO 2014077308A1 JP 2013080765 W JP2013080765 W JP 2013080765W WO 2014077308 A1 WO2014077308 A1 WO 2014077308A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rod
- door
- urging
- closing
- tube
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/14212—Pumping with an aspiration and an expulsion action
- A61M5/14228—Pumping with an aspiration and an expulsion action with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0054—Special features particularities of the flexible members
- F04B43/0072—Special features particularities of the flexible members of tubular flexible members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/082—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
- A61M39/281—Automatic tube cut-off devices, e.g. squeezing tube on detection of air
Definitions
- the present invention relates to a tubing pump that transfers liquid in a tube that is detachably mounted by a pump mechanism.
- a pump body (10) to which an infusion tube (40) can be attached and detached, and a base of the pump body (10) are opened and closed.
- Some have a pivotally supported door (door unit 20) and a handle (23) that closes the valves (14A, 14B) of the pump mechanism by a lever operation following the closing operation of the door.
- the valve (14A) of the pump mechanism is provided.
- 14B) automatically closes, so that the liquid medicine in the infusion tube (40) can be prevented from flowing freely due to gravity or vibration.
- the present invention has been made in view of the above-described conventional circumstances, and a problem to be solved by the present invention is to provide a tubing pump capable of improving the door opening / closing operability.
- One means for solving the above problems is a tubing pump that transfers liquid in a detachably mounted tube by a pump mechanism, and opens and closes the pump body having a base on which the tube can be attached and detached.
- the door pivotally supported with respect to the pump body, and the door is urged in the opening direction in the first rotation range on the fully open side, and is urged in the second rotation range on the fully closed side. It comprises switching urging means for switching the direction to the closing direction, and closing movement suppressing means for suppressing the urging force in the closing direction by the switching urging means in the second rotation range.
- the present invention is configured as described above, the object of improving the door opening / closing operability can be achieved.
- FIG. 1 It is a perspective view which shows an example of the tubing pump which concerns on this invention. It is a perspective view which shows the state which opened the door in the tubing pump. It is the perspective view which looked at the principal part of the tubing pump from the slanting rear side. It is operation
- the first feature of the present embodiment is that, in a tubing pump that transfers liquid in a tube that is detachably mounted by a pump mechanism, a pump body having a base on which the tube can be attached and detached, and the base is opened and closed.
- the door pivotally supported with respect to the pump body, and the door is urged in the opening direction in the first rotation range on the fully open side, and is urged in the second rotation range on the fully closed side.
- the door in the first rotation range, the door is urged to the fully open side by the switching urging means, so that the door stops at the halfway open / closed position and interferes with tube attachment / detachment. Can be prevented.
- the biasing force by the switching biasing means is switched from the opening direction to the closing direction, and the door closing operation is assisted. The Since the urging force at this time is suppressed by the closing movement suppressing means, the impact when the door is fully closed can be reduced. As a result, it is possible to prevent a finger or the like from being caught between the door and the pump body and feeling pain.
- the closing suppression means does not suppress the urging force in the closing direction by the switching urging means in a predetermined range close to full opening in the second rotation range, and in the second rotation range. It is provided so as to suppress the urging force in the closing direction by the switching urging means within a predetermined range close to full closure.
- the closing direction assisting force by the switching urging means is suppressed to weaken the closing direction assist for the door. it can. Therefore, the impact when the door is fully closed can be reduced.
- the switching urging means includes a rod, a rod support portion that supports the rod so as to be rotatable with respect to the pump body and to be slidable in a longitudinal direction of the rod, and the rod And a biasing member that biases the one side of the door in the longitudinal direction, and the switching biasing means is configured such that when the door is located in the first rotation range, When the door is opened by urging the side portion at one end side of the rod and the door is closed until the door is located in the second rotation range, the rod is rotated along with the closing operation. The front end side of the rod is engaged with the door so that the other side portion of the door at the center of rotation is urged on one end side of the rod to close the door. Yes.
- the one end side of the rod when the door is positioned in the first rotation range, the one end side of the rod is positioned at one side portion with the rotation center portion of the door as a boundary. For this reason, the said one side part is urged
- the switching urging means includes a first urging member as the urging member in a portion of the rod in front of the rod support portion
- the closing movement suppressing means includes A second urging member for urging the rod rearward is provided in a portion of the rod on the rear side of the rod support portion.
- the rod is urged forward by the first urging member in a range closer to the full closure than the predetermined angle in the second rotation range, and by the second urging member.
- the load of the second urging member is maintained substantially constant by the rod that is urged rearward and is fully slid from the predetermined angle.
- the first biasing member corresponding to the door angle is less likely to be affected by the load of the second biasing member in the range of the fully open range than the predetermined angle. Only the load of this will act, and a favorable operation feeling can be obtained.
- the pump mechanism includes a valve mechanism that closes the mounted tube by pressing and deforming the mounted tube in the radial direction by the urging force of the valve urging member, and the valve mechanism is liquidated in the tube.
- the valve mechanism is configured to be opened when the door is moved, and when the door is opened, the valve mechanism is pressed to open one end of the rod that rotates with the opening operation, and the door is closed.
- the rod is provided so as to be separated from one end side of the rod and maintained in a closed state by the biasing force of the valve biasing member. According to this configuration, when the door is opened, the valve mechanism is opened by being pressed against one end of the rod that rotates in accordance with the opening operation.
- the tube can be removed from the pump mechanism. Further, when the door is closed, the valve mechanism is separated from the one end side of the rod, and the valve mechanism is maintained in the closed state by the biasing force of the valve biasing member. Therefore, in this state, it is possible to wait for the pump mechanism to start while preventing the liquid in the tube from flowing due to gravity or vibration.
- the tubing pump 1 is for injecting a liquid (for example, a chemical solution or a nutrient) into a tube of a patient by forcibly flowing through the tube (see FIG. 1).
- the tubing pump 1 includes a pump body 10, a door 20 that opens and closes a base 11 that is a front portion of the pump body 10, a tube 30 and a clamp device 40 that are detachably attached to the base 11, and a base 11.
- a pump mechanism 50 for transferring the liquid in the tube 30 and an opening / closing assist mechanism 60 for assisting the opening and closing of the door 20 (see FIGS. 1 to 3).
- the pump body 10 is formed in a substantially rectangular box shape, and has an upright base 11 that is opened and closed by a door 20 on the front side thereof, and a tube 30 is inserted into the base 11 in a sideways state. (See FIGS. 1 to 3).
- the base 11 is a thick, substantially plate-shaped part, and in the front surface thereof, a horizontal groove for attaching / detaching the tube 30, a recess for attaching / detaching the clamp device 40, and the inside of the attached tube 30.
- a pump mechanism 50 for forcibly transferring the liquid is provided.
- a shaft portion 11b (see FIG. 4) for rotatably supporting the door 20 is provided on the lower end side of the base 11.
- the shaft portion 11b is a columnar or cylindrical shaft that is fixed to the concave portion on the lower end side of the base 11 so as not to rotate substantially horizontally.
- the door 20 is a substantially plate-like member that is pivotally supported on the lower end side of the base 11, and is closed so as to cover a substantially vertical front portion of the base 11, or the same surface portion is opened. To do.
- a catch mechanism (not shown) provided between the base 11 and the door 20.
- the catch mechanism includes, for example, a mechanism in which the locking portion on the door 20 side is locked to the locked portion on the base 11 side by the biasing force of the biasing member, and is released by lever operation, What is necessary is just to make it the mechanism etc. which adsorb
- the rotary base 21 is mounted annularly with respect to the shaft 11 b of the base 11 and rotates freely, and engages with an opening / closing assist mechanism 60 described later (see FIGS. 4 to 8). Is provided.
- the rotation base 21 is formed in a substantially cylindrical shape, and a part of the outer peripheral surface thereof is fixed to the lower end side of the door 20, and the other part of the outer peripheral surface is connected to the rod of the opening / closing assist mechanism 60.
- the tip of 61 is pivotally supported.
- the tube 30 is a tubular tube made of a transparent synthetic resin that is deformed and closed so as to be crushed by a radial pressing force, and is elastically restored to its original shape when the pressing force is released.
- the tube 30 When the clamp device 40 is attached to the tube 30, the tube 30 is sandwiched and deformed in the radial direction so as to be closed.
- a predetermined operation for example, a closing operation of the door 20
- the closed state is released when a lever operation (not shown) is performed.
- the pump mechanism 50 is configured to press and release the mounted tube 30 and the valve mechanism 70 on the upstream side thereof.
- the opening / closing operation and the opening / closing operation of the valve mechanism 70 'on the downstream side the liquid in the tube 30 is forcibly transferred in the direction indicated by the arrow in FIG. 2 (see FIG. 2). ).
- the opening / closing assist mechanism 60 is a mechanism supported by the pump main body 10 on the rear side (back side) of the base 11, and is capable of rotating the rod 61 and the rod 61 relative to the pump main body 10.
- a rod support portion 62 that supports the rod 61 so as to be slidable in the longitudinal direction of the rod, a first urging member 63 that urges the rod 61 forward, and a rod 61 at a rear portion of the rod 61 from the rod support portion 62.
- a second urging member 64 that urges rearward (see FIGS. 3 to 8).
- the opening / closing assist mechanism 60 urges the door 20 in the opening direction within the first opening range R1 on the fully open side by the configuration on the front side of the rod support portion 62, and the second rotation on the fully closed side.
- the switching urging means A that switches the urging direction to the closing direction is configured, and by the configuration on the rear side of the rod support portion 62, the switching urging means A in the closing direction by the switching urging means A in the second rotation range R2.
- the closing movement suppressing means B for suppressing the urging force is configured.
- the rod 61 is a shaft-like member that extends in the front-rear direction on the back side of the base 11, moves forward and backward freely in the front-rear direction by the rod support portion 62, and freely rotates about the rod support portion 62. To be supported.
- a front end side (right end side according to FIG. 4) portion (an engagement / disengagement portion 61b described later) of the rod 61 is rotatably connected to the outer peripheral surface of the rotation base portion 21 of the door 20 via a hinge or the like. Yes. Therefore, when the rotation base 21 of the door 20 rotates as the door 20 opens and closes, the front end of the rod 61 is also substantially fan-shaped around the rotation base 21 so as to be pulled by the outer periphery of the rotation base 21. It rotates while drawing a route (see FIGS. 4 to 8).
- the rod support portion 62 is a cylindrical member that is disposed substantially parallel to the rotation base portion 21 of the door 20 and is rotatably supported by the pump main body 10, and slides the rod 61 forward and backward on its peripheral wall. Is inserted through.
- An engagement / disengagement portion 61b that engages / disengages with respect to the valve mechanism 70 (or the valve mechanism 70 ′) is formed on the front end side of the rod support portion 62.
- the engaging / disengaging portion 61b is formed on the outer peripheral surface of a semi-cylindrical shape so as to receive the valve mechanism 70 (see FIGS. 4 to 8).
- the engagement / disengagement portion 61b may be configured such that a ball bearing is disposed on the front end side of the rod support portion 62.
- the first urging member 63 is a compression coil spring, and is annularly attached to a portion of the rod 61 on the front side of the rod support portion 62.
- One seat portion abuts on the outer periphery of the rod support portion 62 and the other.
- the seat portion is received by the step portion 61a on the front end side of the rod 61, and the rod 61 is urged forward.
- the second urging member 64 is a compression coil spring, and is annularly attached to a portion of the rod 61 on the rear side of the rod support portion 62, and one seat portion abuts on the outer periphery of the rod support portion 62.
- the other seat is received by a nut 61c screwed to the rear end side of the rod 61, and the rod 61 is urged rearward.
- a plain washer or the like for adjusting the spring load is interposed as a spacer either before or after the first urging member 63 and / or the second urging member 64.
- valve mechanisms 70 and 70 ′ are closed by pressing and deforming the attached tube 30 in the radial direction by the urging force of the urging member 72 for the valve, and are opened when the liquid is transferred into the tube 30.
- the valve mechanism 70 is arranged on the upstream side of the tube 30, and when the door 20 opens, the front end side of the rod 61 that rotates with the opening operation.
- the door 20 is closed by being pressed, it is separated from the front end side of the rod 61 and is kept closed by the biasing force of the valve biasing member 72.
- the valve mechanism 70 includes a tube placement surface 11a in the base 11, a clamping member 71 that sandwiches the tube 30 between the tube placement surface 11a, and a valve biasing member that biases the clamping member 71 in the clamping direction. 72 and a transmission member 73 configured integrally with the clamping member 71 and transmitting the movement of the rod 61 to the clamping member 71.
- the tube mounting surface 11a is a lower surface of a groove through which the tube 30 is inserted in the base 11, and receives the tube 30 mounted on the base 11 from below.
- the clamping member 71 includes a base piece portion 71a that is rotatably supported with respect to the pump body 10, and a pressing piece portion 71b that is connected to the distal end side of the base piece portion 71a and presses the tube 30 from above. Is done.
- the base piece portion 71a is supported so as to rotate with respect to the pump body 10 via a shaft portion 71c substantially parallel to the tube 30 in the mounted state, and the rotation end side thereof is directed toward the base 11 from above.
- the valve biasing member 72 is biased downward.
- the pressing piece portion 71b is integrally fixed to the rotating end side of the base piece portion 71a, and is formed in a wedge shape in which the lower end side portion is gradually thinned downward.
- the pressing piece 71b is arranged to face the tube mounting surface 11a so as to sandwich the tube 30 at a substantially right angle.
- valve urging member 72 is a compression coil spring, and a seat portion on one side thereof is fixed to the pump body 10, and the clamping member 71 is clamped in the clamping direction by the seat portion on the other side (downward according to the illustrated example). ).
- the transmission member 73 has a crank shape shown in FIGS. 4 to 8, and a receiving portion 73a for receiving a semicircular engaging / disengaging portion 61b of the rod 61 from below and a engaging / disengaging portion 61b on the lower end side thereof. And an inclined surface portion 73b that slides while receiving from an obliquely downward direction (leftward obliquely downward according to FIG. 5).
- the receiving portion 73a is a surface facing the outer peripheral surface of the engaging / disengaging portion 61b of the rod 61 from the upper side.
- the inclined surface portion 73b is an inclined surface connected to the receiving portion 73a through a concave curved surface, and is formed so as to be pressed and slidably contacted with the distal end portion of the engaging / disengaging portion 61b of the rod 61.
- the other valve mechanism 70 ′ is disposed on the downstream side of the tube 30.
- the valve mechanism 70 ′ has substantially the same configuration as the valve mechanism 70, and a detailed description thereof is omitted.
- the first biasing member 63 has a larger spring load than the second biasing member 64 and the valve biasing member 72 (see FIG. 9).
- the rod 61 is ejected forward (rightward according to FIG. 4).
- the rod 61 has its center line positioned on one side (upper side) with the center of the shaft portion 11b (rotation center portion) as a boundary to press the outer peripheral portion of the rotation base portion 21 of the door 20 ( 4), the rotation base 21 and the door 20 are biased in the opening direction.
- the door 20 has a part of the door 20 brought into contact with a non-moving part such as the base 11 (not shown), so that the rotation in the opening direction is restricted and the door 20 stops at the fully opened position.
- a non-moving part such as the base 11 (not shown)
- the engagement / disengagement portion 61 b at the front end of the rod 61 abuts against and presses against the transmission member 73 of the valve mechanism 70 from below, so that the valve mechanism 70 is maintained in a fully open state.
- the tube 30 is held in an open state in which the internal fluid can flow.
- the lower end side of the transmission member 73 is in contact with the side surface of the base 11 so that the rotation of the clamping member 71 in the opening direction is restricted.
- the engagement / disengagement part 61b of the rod 61 is arranged so that the center line of the rod 61 approaches the center (rotation center part) of the shaft part 11b. Moves in a substantially fan shape (see FIGS. 4 and 5). During this movement, in the first rotation range R1 in which the center line of the rod 61 does not exceed the center (rotation center) of the shaft portion 11b, the urging force in the opening direction of the door 20 by the clamping member 71 is maintained. The urging force of the first urging member 63 is accumulated (see FIG. 9).
- the rod 61 is positioned on the other side (lower side) with the center line of the shaft portion 11b as the boundary (rotation center portion), and presses the outer peripheral portion of the rotation base portion 21 of the door 20
- the rotating base 21 and the door 20 are biased in the closing direction. Therefore, the closing operation of the door 20 is assisted by the urging force of the first urging member 63.
- the rod 61 is moved forward and the rod 61 is supported by the rod 61.
- the spring mounting length L (see FIG. 6) at the rear side of the portion 62 is shorter than the free length of the second urging member 64, and the urging force is applied while the second urging member 64 is gradually compressed. Accumulate (see FIG. 9). That is, the closing movement suppression means B including the second urging member 64 and the like is switched in a predetermined range close to full opening in the second rotation range R2 (in the illustrated example, the opening direction side is more than the door angle of 15 °).
- the biasing means in the closing direction by the biasing means A is not suppressed, and the switching biasing means is operated within a predetermined range close to the full closing in the second rotation range R2 (in the illustrated example, the closing direction side is more than the door angle of 15 °).
- the urging force in the closing direction by A is suppressed. Therefore, the impact when the door 20 is fully closed is relieved, the tubing pump 1 is damaged by the impact, or a finger or the like is sandwiched between the door 20 and the base 11 to feel pain. Can be prevented.
- the fully closed state is maintained by the catch mechanism (not shown).
- the valve mechanisms 70 and 70 ' are kept closed by the urging force of the urging member for the valve, so that the liquid in the tube 30 is prevented from flowing due to gravity, vibration, etc. It is possible to wait for the pump mechanism 50 to start.
- the spring mounting length L (see FIG. 6) of the portion of the rod 61 on the rear side of the rod support portion 62 is the second biasing member.
- the load of the second urging member 64 is maintained substantially constant (for example, zero or a value close to zero), and the first amount corresponding to the opening amount of the door 20 is maintained.
- the resistance by the urging member 63 is felt, the urging force of the first urging member 63 is accumulated by this opening operation.
- the rod 61 has its center line positioned above the center of the shaft portion 11b, and the outer peripheral portion of the rotation base portion 21 of the door 20 is positioned.
- the rotation base 21 and the door 20 are urged
- the engagement / disengagement portion 61 b of the rod 61 contacts the inclined surface portion 73 b of the transmission member 73, and when this time is further exceeded in the opening direction, the door
- the engaging / disengaging portion 61 b rotates the holding member 71 in the opening direction while slidingly contacting the inclined surface portion 73 b.
- the engagement / disengagement portion 61b comes into contact with the receiving portion 73a of the transmission member 73.
- the opening operation of the door 20 and the rotation of the rod 61 are maintained while the contact state is maintained.
- the rotation of the clamping member 71 is interlocked.
- the fully open position of the door 20 was made into the state whose angle of the door 20 is about 90 degrees with respect to the base 11, as another example of this fully open position, for example with respect to the base 11, It is also possible to adopt a mode in which the angle of the door 20 is about 100 °, a mode in which other angles are set, and the like.
- Other examples of the first urging member 63, the second urging member 64, and the valve urging member 72 include an aspect using a tension spring, an elastic member other than a coil spring, such as a rubber or a leaf spring. It is possible to adopt an embodiment using.
- the switching urging means A and the closing movement suppression means B were comprised by the integral opening / closing assist mechanism 60, as another example, the switching urging means A and the closing movement suppression means B are comprised. It is also possible to adopt an independent configuration.
- the urging force of the second urging member 64 does not act in the first rotation range R1, but as another example, one in the first rotation range R1. It is also possible to adopt a mode in which the urging force of the second urging member 64 acts in a part or all of the range.
- the door angles corresponding to each of FIGS. 4 to 8 are set to (a) 90 °, (b) 50 °, (c) 15 °, (d) as shown in FIG. Although 7.5 ° and (e) 0 °, these angles are the angle range in which the door can be opened and closed, the spring load and the mounting length of each urging member, the positional relationship between the opening / closing assist mechanism 60 and the door 20, etc. It is possible to change by adjusting.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
この従来技術によれば、ポンプ本体(10)に輸液チューブ(40)を装着し、ドア(ドアユニット20)を閉鎖した後、ハンドル(23)を回動させれば、ポンプ機構のバルブ(14A,14B)が自動的に閉鎖するため、輸液チューブ(40)内の薬液等が重力や振動等によって勝手に流動してしまうのを防ぐことができる。
しかしながら、前者の場合には、電動モータやギヤ、スイッチ等を用いるため部品コストの高騰を招きやすい。また、後者の場合には、電動モータを用いる場合と比較して低コストな生産が期待できるが、バネが弱すぎると十分なアシストが得られず、バネが強すぎるとドア全閉時の衝撃が大きすぎてしまうので、工夫を要する。
この構成によれば、第1の回動範囲では、ドアが切替付勢手段により全開側に付勢されるため、ドアが中途半端な開閉位置で停止して、チューブ着脱の邪魔になるようなことを防ぐことができる。また、ドアの閉鎖動作中、該ドアが第2の回動範囲に侵入した際には、切替付勢手段による付勢力が開放方向から閉鎖方向へ切り替えられて、該ドアの閉鎖動作がアシストされる。この際の付勢力は、閉動抑制手段により抑制されるため、ドアが全閉する際の衝撃を緩和することができる。その結果として、ドアとポンプ本体の間に指等が挟まれて痛みを感じるようなことを防ぐことができる。
この構成によれば、ドアを閉鎖動作した際、そのドアは、第2の回動範囲に侵入すると、切替付勢手段による閉鎖方向の付勢力を受ける。従って、ドアの閉鎖動作をスムーズに行うことができる。そして、ドアが第2の回動範囲における全閉寄りの所定範囲に侵入した際には、切替付勢手段による閉鎖方向の付勢力を抑制することで、ドアに対する閉鎖方向のアシストを弱めることができる。従って、ドア全閉時の衝撃を緩和することができる。
この構成によれば、ドアが第1の回動範囲に位置する際には、ドアにおける回動中心部を境にした一方側部分に、ロッドの一端側が位置する。このため、前記一方側部分がロッドの一端側に付勢されることで、ドアが開放方向へ動作する。
また、ドアが第2の回動範囲に位置するまで閉鎖動作した際には、その閉鎖動作に伴いロッドがロッド支持部を中心にして回動し、ロッドの一端側が、ドアにおける回動中心部を境にした他方側部分に移動する。このため、前記他方側部分がロッドの一端側に付勢されることで、ドアが閉鎖方向へ動作する。
この構成によれば、切替付勢手段と閉動抑制手段とを、同一のロッドの前後部分に配設するようにしているため、これらの構造を省スペースな一体構造とすることができる。
この構成によれば、所定角度よりも全開よりの範囲では、第2の付勢部材の荷重の影響を受け難く、ドアを操作する手等には、ドア角度に応じた第1の付勢部材の荷重のみが作用することになり、良好な操作感を得ることができる。
この構成によれば、ドアを開放動作した際には、この開放動作に伴い回動する前記ロッドの一端側に押圧されてバルブ機構が開放する。従って、この状態では、チューブをポンプ機構から外すことが可能となる。
また、ドアが閉鎖動作した際には、バルブ機構からロッドの一端側から離れて、バルブ機構がバルブ用付勢部材の付勢力により閉塞状態に維持される。従って、この状態では、チューブ内の液体が重力や振動等によって流動してしまうのを阻みながら、ポンプ機構の起動を待つことができる。
このチュービングポンプ1は、ポンプ本体10と、ポンプ本体10の正面部である基台11を開閉するドア20と、基台11に着脱可能に装着されるチューブ30及びクランプ装置40と、基台11に設けられてチューブ30内の液体を移送するポンプ機構50と、ドア20の開閉をアシストする開閉アシスト機構60とを具備している(図1~図3参照)。
この回転基部21は、図示例によれば、略円筒状に形成され、その外周面の一部をドア20下端側に固定し、同外周面の他の一部に、開閉アシスト機構60のロッド61の先端部を回転可能に軸支している。
そして、この開閉アシスト機構60は、ロッド支持部62よりも前側の構成によって、ドア20を全開側の第1の回動範囲R1で開放方向へ付勢し、全閉側の第2の回動範囲R2では付勢方向を閉鎖方向へ切り替える切替付勢手段Aを構成し、同ロッド支持部62よりも後側の構成によって、第2の回動範囲R2で切替付勢手段Aによる閉鎖方向の付勢力を抑制する閉動抑制手段Bを構成する。
このロッド支持部62の前端側には、バルブ機構70(又はバルブ機構70')に対し係脱する係脱部61bが形成される。この係脱部61bは、バルブ機構70を受けるように、半円柱状の外周面に形成されている(図4~図8参照)。
尚、係脱部61bとして、ロッド支持部62の前端側にボールベアリングを配置した形態することも可能である。
より詳細に説明すれば、バルブ機構70は、図2に示すように、チューブ30の上流側に配置され、ドア20が開放動作した際に、この開放動作に伴い回動するロッド61の前端側に押圧されて開放し、ドア20が閉鎖動作した際には、ロッド61の前端側から離れて、バルブ用付勢部材72の付勢力により閉塞状態に維持される。
このバルブ機構70は、基台11におけるチューブ載置面11aと、チューブ載置面11aとの間にチューブ30を挟む挟持部材71と、挟持部材71を挟持方向へ付勢するバルブ用付勢部材72と、挟持部材71と一体的に構成されるとともにロッド61の動きを挟持部材71へ伝達する伝達部材73とを具備している。
受部73aは、上方側から、ロッド61の係脱部61b外周面に対向する面である。
傾斜面部73bは、受部73aに対し凹曲面を介して接続された傾斜面であり、ロッド61の係脱部61b先端部に押圧及び摺接されるように形成される。
この状態では、ロッド61は、その中心線を軸部11bの中心(回動中心部)を境にした一方側(上側)に位置させて、ドア20の回転基部21外周部を押圧するため(図4参照)、回転基部21及びドア20は開放方向へ付勢される。ドア20は、該ドア20の一部分を基台11等の不動部位に当接させることで(図示せず)、開放方向への回転が規制され、全開位置で静止する。
また、この状態では、図4に示すように、ロッド61前端の係脱部61bが、バルブ機構70の伝達部材73に下方から当接し押圧することで、バルブ機構70が全開状態に維持される。従って、バルブ機構70の部分においては、チューブ30が、内部の流体を流通可能な開放状態に保持される。なお、この状態では、伝達部材73の下端側が基台11の側面に当接することで、挟持部材71の開放方向への回動が規制される。
また、前記移動中(換言すれば、第1の回動範囲R1の全開寄りにおけるドア20の閉鎖動作中)、ロッド61前端の係脱部61bの下方への回動に追従するようにして、挟持部材71がバルブ用付勢部材72の付勢力により下方へ回動するため、挟持部材71前端の押圧片部71bがチューブ30を押圧して徐々に閉塞する。そして、ロッド61前端の係脱部61bが更に下方へ回動すると、図5に示すように、該係脱部61bは、伝達部材73の受部73aから離れ、傾斜面部73bに摺接しながら下方へ移動する。
前記閉鎖動作中、第2の回動範囲R2において、第1の付勢部材63は、伸長しながらロッド61を前方へ付勢し、バネ荷重を徐々に下降させてゆく(図9参照)。また、この状態で、ロッド61は、その中心線を軸部11bの中心(回動中心部)を境にして他方側(下側)に位置させて、ドア20の回転基部21外周部を押圧するため(図6~図8参照)、回転基部21及びドア20は閉鎖方向へ付勢される。よって、ドア20の閉鎖動作が第1の付勢部材63の付勢力によりアシストされることになる。
すなわち、第2の付勢部材64等からなる閉動抑制手段Bは、第2の回動範囲R2における全開寄りの所定範囲(図示例によればドア角度15°よりも開放方向側)では切替付勢手段Aによる閉鎖方向の付勢力を抑制せず、第2の回動範囲R2における全閉寄りの所定範囲(図示例によればドア角度15°よりも閉鎖方向側)で切替付勢手段Aによる閉鎖方向の付勢力を抑制する。
よって、ドア20が全閉する際の衝撃が緩和され、その衝撃によって当該チュービングポンプ1が損傷したり、ドア20と基台11との間に指等が挟まれて痛みを感じたり等するのを防ぐことができる。
この全閉状態では、バルブ機構70,70'がバルブ用付勢部材の付勢力により閉塞状態に維持されるため、チューブ30内の液体が重力や振動等によって流動してしまうのを阻みながら、ポンプ機構50の起動を待つことができる。
10:ポンプ本体
11:基台
11b:軸部
20:ドア
21:回転基部
30:チューブ
50:ポンプ機構
60:開閉アシスト機構
61:ロッド
62:ロッド支持部
63:第1の付勢部材
64:第2の付勢部材
70,70':バルブ機構
A:切替付勢手段
B:閉動抑制手段
R1:第1の回動範囲
R2:第2の回動範囲
Claims (6)
- 着脱可能に装着されるチューブ内の液体をポンプ機構により移送するチュービングポンプにおいて、
チューブを着脱可能な基台を有するポンプ本体と、
前記基台を開閉するように前記ポンプ本体に対し回動可能に軸支されるドアと、
前記ドアを全開側の第1の回動範囲で開放方向へ付勢し全閉側の第2の回動範囲では付勢方向を閉鎖方向へ切り替える切替付勢手段と、
第2の回動範囲で前記切替付勢手段による閉鎖方向の付勢力を抑制する閉動抑制手段とを具備することを特徴とするチュービングポンプ。 - 前記閉動抑制手段は、第2の回動範囲における全開寄りの所定範囲では前記切替付勢手段による閉鎖方向の付勢力を抑制せず、第2の回動範囲における全閉寄りの所定範囲で前記切替付勢手段による閉鎖方向の付勢力を抑制するように設けられていることを特徴とする請求項1記載のチュービングポンプ。
- 前記切替付勢手段は、ロッドと、前記ロッドを前記ポンプ本体に対し回動可能であって且つ前記ロッドの長手方向へスライド可能に支持するロッド支持部と、前記ロッドを長手方向の一方へ付勢する付勢部材とを備え、
この切替付勢手段は、前記ドアが第1の回動範囲に位置する際に、前記ドアにおける回動中心部を境にした一方側部分を前記ロッドの一端側で付勢して前記ドアを開放動作させ、前記ドアが第2の回動範囲に位置するまで閉鎖動作した際には、その閉鎖動作に伴い前記ロッドを回動させて、前記ドアにおける回動中心部を境にした他方側部分を前記ロッドの一端側で付勢して前記ドアを閉鎖動作させるように、前記ロッドの前端側を前記ドアに係合していることを特徴とする請求項1又は2記載のチュービングポンプ。 - 前記切替付勢手段は、前記ロッドにおける前記ロッド支持部よりも前側の部分に、前記付勢部材としての第1の付勢部材を具備し、
前記閉動抑制手段は、前記ロッドにおける前記ロッド支持部よりも後側の部分に、前記ロッドを後方へ付勢する第2の付勢部材を具備してなることを特徴とする請求項3記載のチュービングポンプ。 - 第2の回動範囲における所定角度よりも全閉寄りの範囲で、前記ロッドが、第1の付勢部材により前方へ付勢されるとともに第2の付勢部材により後方へ付勢され、
前記所定角度よりも全開よりの範囲では、後方へスライドした前記ロッドによって第2の付勢部材の荷重が一定に維持されるようにしたことを特徴とする請求項4記載のチュービングポンプ。 - 前記ポンプ機構は、装着されたチューブをバルブ用付勢部材の付勢力によって径方向へ押圧し変形させて閉塞するバルブ機構を備え、このバルブ機構を前記チューブ内に液体を移送する際に開放するように構成され、
前記バルブ機構は、前記ドアが開放動作した際に、この開放動作に伴い回動する前記ロッドの一端側に押圧されて開放し、前記ドアが閉鎖動作した際には、前記ロッドの一端側から離れて、前記バルブ用付勢部材の付勢力により閉塞状態に維持されるように設けられていることを特徴とする請求項1~5何れか1項記載のチュービングポンプ。
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EP13855928.1A EP2924289B1 (en) | 2012-11-14 | 2013-11-14 | Tubing pump |
US14/443,057 US10012225B2 (en) | 2012-11-14 | 2013-11-14 | Tubing pump |
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JP2022088523A (ja) * | 2015-06-26 | 2022-06-14 | 株式会社菊池製作所 | 投薬機構 |
JP7337466B2 (ja) | 2015-06-26 | 2023-09-04 | 株式会社菊池製作所 | 投薬機構 |
US20170159659A1 (en) * | 2015-12-04 | 2017-06-08 | Clay Valley Holdings Inc. | High volume vacuum pump for continuous operation |
US10041495B2 (en) * | 2015-12-04 | 2018-08-07 | Clay Valley Holdings Inc. | High volume vacuum pump for continuous operation |
Also Published As
Publication number | Publication date |
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JP6307437B2 (ja) | 2018-04-04 |
JPWO2014077308A1 (ja) | 2017-01-05 |
EP2924289B1 (en) | 2019-08-14 |
EP2924289A1 (en) | 2015-09-30 |
US10012225B2 (en) | 2018-07-03 |
EP2924289A4 (en) | 2016-10-19 |
EP2924289A8 (en) | 2015-11-25 |
US20150275887A1 (en) | 2015-10-01 |
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