JP2021023327A - Liquid transfer tool - Google Patents

Abstract

To provide a liquid transfer tool capable of transferring surely a liquid with a simple structure.SOLUTION: A liquid transfer tool 1 comprises a main body part 21 comprising a conduit needle 23 and a joint part 32, and in the main body part 21, a channel communicated with the conduit needle 23 and the joint part 32 is formed. The channel comprises a valve chamber 31 for storing a spherical valve body 4 in a manner of capable of oscillating in a channel direction. The valve chamber 31 comprises a supply hole 212a which is hermetically sealed when the spherical valve body 4 contacts thereto, on the conduit needle 23 side and a regulation part 311 for regulating movement of the spherical valve body 4 while forming a gap S on the channel when the spherical valve body 4 contacts thereto, on the joint part 32 side.SELECTED DRAWING: Figure 5

Description

The present invention relates to a liquid transfer tool.

Conventionally, a liquid transfer tool for taking out a liquid from a vial and transferring the liquid has been proposed. For example, Patent Document 1 discloses a device for directly taking a substance such as a medicine from a vial into a distribution device. This device has a vial adapter and a connector. The vial adapter engages the vial and the connector is coupled with the fluid container. The device located between the vial and the container is provided with conduits and valves for communicating fluids. The valve is configured to move and open when the vial adapter is moved towards the connector, allowing fluid to flow.

Special Table No. 9-501342

However, in the device of Patent Document 1, the valve opening / closing operation is performed by the relative position of the vial adapter and the connector, and the operation of controlling the transfer of the liquid is complicated.

An object of the present invention is to provide a liquid transfer tool that reliably transfers a liquid with a simple configuration.

The liquid transfer tool of the present invention has a conduit needle and a joint portion, and includes a main body portion in which a flow path communicating with the conduit needle and the joint portion is formed, and a spherical valve body is passed through the flow path. A valve chamber that swings in the direction of the road is provided, and the valve chamber has a supply port on the conduit needle side that is sealed when the spherical valve body comes into contact with the valve chamber. It is characterized in that the joint portion has a regulating portion that regulates the movement of the spherical valve body while forming a gap in the flow path.

According to the present invention, it is possible to provide a liquid transfer tool that reliably transfers a liquid with a simple configuration.

It is a perspective view which looked at the liquid transfer tool which concerns on embodiment of this invention from the joint part side. It is an exploded perspective view seen from the joint part side of the liquid transfer tool which concerns on embodiment of this invention. It is an exploded perspective view seen from the conduit needle side of the liquid extraction tool which concerns on embodiment of this invention. FIG. 2A is a sectional view taken along line IVa-IVa of the liquid transfer tool shown in FIG. 1 according to an embodiment of the present invention, and (b) is a sectional view of a vial in which the liquid transfer tool is used. It is sectional drawing which omitted a part of the container body explaining the use method of the liquid transfer tool which concerns on embodiment of this invention, (a) shows the state which attached the liquid transfer tool to a vial, (b) is a vial. Indicates a state in which a negative pressure is applied to the syringe to suck the liquid. It is sectional drawing which omitted a part of the container body explaining the use method of the liquid transfer tool which concerns on embodiment of this invention, (a) shows the state which stopped sucking liquid from a vial, (b) is a liquid. It shows the state where the transfer tool is returned to the original position so that the vial is located at the top and the vial at the bottom.

Next, an embodiment of the present invention will be described with reference to the drawings. The liquid transfer tool 1 shown in FIG. 1 takes out a liquid such as a chemical solution as a content from the inside of the vial 5 into which the conduit needle 23 is inserted, and connects the syringe 6 to the joint portion 32 (see FIGS. 5 and 6). Can be transferred to other containers such as. The liquid transfer tool 1 is formed in a substantially cylindrical shape having a substantially axial symmetry with respect to the axis L1 as a whole, and has a liquid flow path inside. The liquid transfer tool 1 includes a first member 2 and a second member 3 arranged on the axis L1 and a spherical valve body 4 (see FIG. 2 and the like) included in the first member 2 and the second member 3. The spherical valve body 4 opens and closes to control the transfer of the liquid.

2 and 3 are an exploded perspective view of the liquid transfer tool 1 as viewed from the joint portion 32 side and an exploded perspective view of the liquid transfer tool 1 as viewed from the conduit needle 23 side, respectively. Further, FIG. 4A shows a sectional view taken along line IVa-IVa of the liquid transfer tool 1 shown in FIG.

The first member 2 has a cylindrical main body portion 21, a cylindrical frame-shaped guide portion 22 formed on the outer periphery of the main body portion 21, and a conduit needle 23. The main body 21 has a bottomed tubular engaging portion 211 having a circular bottom portion 211a on the opposite side of the conduit needle 23. At the center of the bottom portion 211a on the axis L1, a circular hole-shaped supply port 212a communicating with the inner passage portion 212 having a circular cross section is formed.

The guide portion 22 has a substantially fan-shaped flat plate-shaped support portion 221 extending from the outer surface 21a of the main body portion 21 to the outer circumference, and an axis L1 direction on the conduit needle 23 side from the edge on the outer diameter side of the support portion 221. It has a guide wall portion 222 extending to. The support portion 221 and the guide wall portion 222 are provided at four locations around the axis L1 so as to form the slit 223. The plurality of guide wall portions 222 are formed in a substantially cylindrical shape coaxial with the axis L1. The slit 223 is formed extending radially outward with respect to the axis L1 from the main body 21 side, which is the base end portion of the support portion 221 to the tip end side of the guide wall portion 222. Therefore, the support portion 221 can be bent against the elastic force in the axis L1 direction of the guide portion 22, and the inner diameter of the inner surface of the guide wall portion 222 can be increased.

The conduit needle 23 includes a base end portion 231 that is connected to the main body 21 side and has a substantially constant outer diameter, an inclined portion 232 that extends from the lower end side of the base end portion 231 while reducing the diameter, and the conduit needle 23. It has a conical inclined portion 233 whose diameter is reduced at a steeper angle than the inclined portion 232 on the tip end side. As shown in FIGS. 4A and 5A, an inner passage portion 212, which is a circular hole portion, is formed in the main body portion 21 and the conduit needle 23. The conduit needle 23 has a communication hole 234 that communicates the inside and outside with the inside communication portion 212 at the inclined portion 232.

The opening edge of the communication hole 234 is formed in a substantially circular shape when the first member 2 is viewed from the tip end side of the conduit needle 23 and is not shown. The inner passage portion 212 is formed with a substantially flat bottom portion 212b on the tip end side of the conduit needle 23. Further, as shown in FIG. 5A, the bottom portion 212b of the inner communication portion 212 is arranged between the opposite end edges 234a and 234b of the opening edge portion of the communication hole 234 in the axis L1 direction. A groove 234c, which is a part of the communication hole 234, is formed on the inner wall of the inner communication portion 212 in the axis L1 direction (see FIG. 5A and the like).

In FIGS. 2 and 3, the second member 3 is formed in a substantially cylindrical shape penetrating along the axis L1. A valve chamber 31 and a joint portion 32 are formed in the through hole in the second member 3. The inner diameter of the valve chamber 31 is formed to be substantially the same diameter (see also FIG. 4A) in the direction of the axis L1 in a substantially circular cross-sectional view. On the joint portion 32 side of the valve chamber 31, a regulating portion 311 protruding toward the center side (axis line L1 side) of the valve chamber 31 is provided on the inner peripheral surface facing the axis L1 in one direction. The regulation unit 311 is formed in a plate shape. The regulation unit 311 can restrict the movement of the spherical valve body 4, which will be described later, to the joint portion 32 side. Further, the discharge port 312 formed by the inner surfaces of the valve chamber 31 and the regulating portion 311 is formed in a substantially long rectangular shape, and the opposite end faces in the short direction are formed in a convex arc shape on the outer side. The width of the gap between the opposing regulation portions 311 is formed to be smaller than the outer diameter of the spherical valve body 4. The conduit needle 23, the supply port 212a, and the regulating portion 311 are arranged on the coaxial line L1.

The joint portion 32 is formed in a substantially circular cross-sectional view along the axis L1 direction. Further, the inner diameter of the joint portion 32 is inclined so as to slightly increase in diameter from the regulation portion 311 side toward the opening portion 321 side. Further, a flange portion 33 having a protruding outer diameter is formed on the outer periphery of the second member 3 on the opening 321 side. The outer diameter of the outer surface 3a of the second member 3 is formed to be slightly smaller than the inner diameter of the inner side surface 211b of the engaging portion 211 of the main body portion 21. Further, the outer diameter of the outer surface 33a of the flange portion 33 and the outer diameter of the outer surface 21a of the main body portion 21 are substantially the same, and the surface 33b on the first member 2 side of the flange portion 33 and the second member of the main body portion 21 The end face 21b on the third side is formed to be substantially flat. Therefore, as shown in FIG. 4A, when the second member 3 is engaged with the engaging portion 211 of the first member 2, the first member 2 and the second member 3 are sealed. , Fluid leakage is prevented.

The spherical valve body 4 of the present embodiment can be configured to generate buoyancy with respect to the liquid flowing through the flow path in the liquid transfer tool 1, for example, a material having a density lower than that of the liquid or a hollow structure. Can be. The spherical valve body 4 can be formed of a resin material such as POM (polyacetal). The spherical valve body 4 is housed in the valve chamber 31 (see FIG. 4A). The outer diameter of the spherical valve body 4 is formed to be smaller than the inner diameter of the valve chamber 31 and larger than the opening diameter of the supply port 212a. Further, the outer diameter of the spherical valve body 4 is formed to be larger than the width of the discharge port 312 in the short direction (the width of the gap between the opposing regulation portions 311) and smaller than the width of the discharge port 312 in the long direction. Will be done. Therefore, in a state where the spherical valve body 4 as shown in FIG. 4A is housed in the valve chamber 31, the spherical valve body 4 can swing in the axis L1 direction, but is restricted to the supply port 212a. The swing range is regulated with the portion 311.

The vial 5 in which the liquid transfer tool 1 is used will be described with reference to the overall sectional view of FIG. 4 (b). The vial 5 can be formed into a relatively large volume having an internal volume of, for example, about 60 ml. A rubber stopper 53 is fitted in the opening 51a1 of the neck portion 51a of the container body 51 filled with the content liquid. A Teflon sheet 52 (Teflon membrane film) (“Teflon” is a registered trademark) is attached to the lower surface of the rubber stopper 53 (inside the container body 51). The Teflon sheet 52 prevents adsorption between the content liquid filled in the container body 51 and the rubber stopper 53.

On the other hand, a sheet-shaped aluminum cover 54 is provided on the outside of the rubber stopper 53. A resin cap 55 is attached to the outside of the aluminum cover 54. The aluminum cover 54 is provided so as to cover the opening of the container body 51 from the rubber stopper 53 to a part of the neck portion 51a. The aluminum cover 54 is adhered to the cap 55 in a circular predetermined range (diameter φX) around the axis L2 of the vial 5, and is adhered to the rubber stopper 53 and the neck portion 51a outside the predetermined range. The cap 55 attached to the vial 5 is removed by using an appropriate tool or the like. When the cap 55 is removed, the surface of the rubber stopper 53 is exposed by the predetermined range on the axis L2.

Next, a usage example of the liquid transfer tool 1 will be described mainly with reference to FIGS. 5 and 6. The liquid transfer tool 1 shown in FIGS. 5 and 6 shows a cross-sectional view of Va-Va of the liquid transfer tool 1 of FIG. 1, and the vial 5 shows a cross-sectional view in which a part of the container body 51 is omitted. There is. Further, in the description of FIGS. 5 and 6, the liquid to be transferred from the inside of the vial 5 to the syringe 6 side is not shown.

First, in FIG. 5A, the conduit needle 23 is inserted into the exposed rubber stopper 53 of the vial 5 with the cap 55 removed and the opening 51a1 facing upward. The conduit needle 23 penetrates the rubber stopper 53 and the Teflon sheet 52, and the tip portion 233a side is inserted into the container body 51. Further, the guide portion 22 of the liquid transfer tool 1 is engaged so as to cover the outer periphery of the neck portion 51a including the aluminum cover 54. The inner diameter formed by the inner side surface of the guide wall portion 222 of the guide portion 22 can be formed to be substantially the same as or slightly smaller than the outer peripheral diameter of the neck portion 51a. Therefore, the guide wall portion 222 is restricted from swinging in a direction perpendicular to the axis L1 (in other words, a direction parallel to the opening surface of the opening 51a1), and the liquid transfer tool 1 is stably moved with respect to the neck portion 51a. Can be engaged. Further, when the inner diameter of the guide wall portion 222 is formed to be slightly smaller than the outer diameter of the neck portion 51a, the support portion 221 has an elastic force with respect to the main body portion 21 when the guide portion 22 is engaged with the neck portion 51a. The guide wall portion 222 can be expanded in diameter to the outside of the opening 51a1. The guide wall portion 222 can sandwich the neck portion 51a by the elastic force.

Then, when the liquid transfer tool 1 is moved until the support portion 221 and the aluminum cover 54 come into contact with each other, the liquid transfer tool 1 is stably engaged with the neck portion 51a. At this time, the communication hole 234 is arranged in the container main body 51. Further, the spherical valve body 4 arranged in the valve chamber 31 comes into contact with the supply port 212a located below the valve chamber 31 by its own weight, and seals the supply port 212a. Since the supply port 212a is formed in a circular shape as shown in FIG. 2 and the spherical valve body 4 is also formed in a spherical shape, the spherical valve body 4 and the supply port 212a are sealed without a gap. Further, the luer portion 61 of the syringe 6 is engaged with the joint portion 32. The luer portion 61 is formed in a cylindrical shape whose diameter is reduced toward the opening end side, and the outer peripheral surface of the luer portion 61 and the inner peripheral surface of the joint portion 32 are substantially in contact with each other. As a result, a flow path from the inside of the vial 5 to the inside of the syringe 6 is formed through the communication hole 234, the internal communication portion 212, and the valve chamber 31.

Then, as shown in FIG. 5B, with the vial 5, the liquid transfer tool 1, and the syringe 6 attached, the posture is turned upside down so that the vial 5 is located upward and the syringe 6 is located downward. Then, the spherical valve body 4 moves to the regulation portion 311 side due to its own weight. On the other hand, new air does not flow into the vial 5, and the liquid in the vial 5 does not move to the syringe 6 side via the liquid transfer tool 1.

The regulation unit 311 is arranged to face each other (see FIG. 4A), and the spherical valve body 4 makes point contact with the inner edge 311a of the regulation unit 311 in the posture in which the regulation unit 311 of the valve chamber 31 is positioned downward. Movement to the syringe 6 side is restricted. A gap S that allows fluid to flow is formed between the spherical valve body 4 and the discharge port 312.

When a negative pressure is applied to the syringe 6 by pulling a piston (not shown) in the syringe 6, the liquid in the vial 5 flows from the supply port 212a into the valve chamber 31 through the communication hole 234 and the inner communication portion 212. And moves into the luer portion 61 of the syringe 6 through the gap S. At this time, the container body 51 of the vial 5 can be deformed so that the volume decreases according to the outflow of the liquid. The spherical valve body 4 tends to move to the supply port 212a side due to buoyancy against the liquid flowing through the valve chamber 31, but moves to the regulation unit 311 side due to the flow of the liquid moving from the supply port 212a to the regulation unit 311 side. Being buoyant. While applying negative pressure to the syringe 6, the spherical valve body 4 is in contact with the regulating portion 311 to be in a valve open state.

In FIG. 6A, when the operation of applying negative pressure to the syringe 6 is stopped, the movement of the fluid in the valve chamber 31 is stopped. At this time, the spherical valve body 4 in the valve chamber 31 moves toward the supply port 212a due to buoyancy. Further, when the container body 51 swells to return to the original shape, the inner passage portion 212 side (vial 5 side) becomes negative pressure (negative pressure) as compared with the valve chamber 31 side, and the spherical valve body 4 has a supply port. It abuts so as to seal against 212a.

Even if a positive pressure is applied to the syringe 6 containing the liquid, the spherical valve body 4 is pressed against the supply port 212a by the pressure from the syringe 6, so that the liquid transfer tool 1 is on the vial 5 side (conduit needle 23 side). It also functions as a check valve to prevent the liquid from flowing back.

In this way, even if the operation of the piston of the syringe 6 is stopped, the piston is not pulled back by the negative pressure in the vial 5. When the liquid transfer operation is completed, the syringe 6 is removed from the joint portion 32. A small amount of liquid may remain in the valve chamber 31, but the liquid is prevented from dripping due to surface tension or the like in the valve chamber 31.

In the state of FIGS. 5 and 6 in which the conduit needle 23 is housed in the container body 51, the end edge 234b on the tip end side of the conduit needle 23 is larger than the rubber stopper 53 (or Teflon sheet 52) in the axis L1 direction. It is preferably arranged inside the container body 51. Further, the end edge 234a on the base end side of the conduit needle 23 is located at substantially the same position as the inner surface of the rubber stopper 53 (or Teflon sheet 52) in the axis L1 direction, or the inner side (aluminum cover) of the rubber stopper 53 (or Teflon sheet 52). It is preferably arranged on the 54 side). As a result, the liquid in the vial 5 easily flows into the inner passage portion 212 of the liquid transfer tool 1 through the communication hole 234, and the occurrence of unsucked liquid can be reduced.

Further, when the bottom portion 212b of the inner communication portion 212 is arranged inside the container body 51 with respect to the rubber stopper 53 (or Teflon sheet 52), the cross-sectional area of the flow path in the communication hole 234 can be widened, and the flow path resistance. Can be further reduced. The edge 234a of the communication hole 234 may be arranged on the base end portion 231.

As shown in FIG. 6B, with the liquid transfer tool 1 attached to the vial 5, the posture is returned so that the vial 5 is positioned downward and the liquid transfer tool 1 is positioned upward again. If liquid remains in the valve chamber 31, the spherical valve body 4 floats to the regulation portion 311 side due to buoyancy, and the remaining liquid returns from the supply port 212a to the vial 5 side. When the liquid in the valve chamber 31 returns to the vial 5, the spherical valve body 4 moves to the supply port 212a side by its own weight and closes the supply port 212a again so as to seal it.

When the liquid transfer tool 1 is configured as described above, conventionally, when the luer portion 61 of the syringe 6 is directly inserted into the rubber stopper 53 and used, a gap is generated between the luer portion 61 and the rubber stopper 53 and the liquid leaks. However, by attaching the liquid transfer tool 1 of the present embodiment to the vial 5, the luer portion 61 can be attached to and detached from the liquid transfer tool 1 and the liquid in the vial 5 can be transferred to the syringe 6. .. Further, since the liquid transfer tool 1 has a liquid leakage prevention mechanism in which the spherical valve body 4 seals the supply port 212a, it is possible to prevent liquid leakage even when the bottom of the vial 5 is gripped upward. it can.

When the syringe 6 is engaged with the liquid transfer tool 1 and the suction operation of the syringe 6 is performed, the liquid transfer tool 1 opens and the liquid is transferred from the vial 5 side to the syringe 6 side. Further, when the suction operation is stopped, the liquid transfer tool 1 is surely closed by the negative pressure on the vial 5 side to regulate the backflow of the liquid, so that the hygiene inside the vial 5 can be maintained. As described above, the liquid transfer tool 1 can reliably transfer the liquid with a simple structure.

Although the embodiment of the present invention has been described above, the present invention is not limited to the present embodiment and can be implemented with various modifications. For example, in the description of the present embodiment, the spherical valve body 4 has a configuration in which buoyancy is generated with respect to the liquid flowing in the valve chamber 31, but the spherical valve body 4 may be composed of a member having a specific gravity larger than that of the liquid.

In this case, in FIG. 5B, when the liquid transfer tool 1 is attached to the vial 5 and the luer portion 61 of the syringe 6 is engaged with the liquid transfer tool 1, a negative pressure is applied to the syringe 6 side. The liquid in 5 moves to the syringe 6 side. At this time, the container body 51 of the vial 5 is deformed so that its volume decreases as the liquid flows out. In FIG. 6A, when the operation of applying the negative pressure in the syringe 6 is stopped, the movement of the fluid in the valve chamber 31 is stopped. When the operation to make the inside of the syringe 6 negative pressure is released, the vial 5 tries to return to the original shape, so that the inner passage portion 212 side (vial 5 side) has a negative pressure (negative pressure) as compared with the valve chamber 31 side. Then, the spherical valve body 4 moves toward the supply port 212a together with the liquid in the valve chamber 31, and the spherical valve body 4 comes into contact with the supply port 212a so as to be sealed. As a result, the piston is not pulled back by the negative pressure in the vial 5 and the liquid is prevented from dripping, as in the case where the spherical valve body 4 is provided with buoyancy. Further, even if the posture of the vial 5 is changed such that the vial 5 side is turned down in FIG. 6B, the spherical valve body 4 is urged against the supply port 212a by the negative pressure in the vial 5, so that the vial 5 is used. The sealing property inside can be ensured.

Further, in the description of the present embodiment, an example in which the valve chamber 31 is provided in the second member 3 has been described, but the valve chamber 31 may be provided in the first member 2. The valve chamber 31 can be provided at an arbitrary position in the flow path communicating with the conduit needle 23 and the joint portion 32.

1 Liquid transfer tool 2 First member 3 Second member 3a Outer side surface 4 Spherical valve body 5 Vial 6 Syringe 21 Main body part 21a Outer side surface 21b End surface 22 Guide part 23 Conduit needle 31 Valve chamber 32 Joint part 33 Flange part 33a Outer side surface 33b Surface 51 Container body 51a Neck 51a1 Opening 52 Teflon sheet 53 Rubber stopper 54 Aluminum cover 55 Cap 61 Luer part 211 Engagement part 211a Bottom part 211b Inner side surface 212 Inner passage part 212a Supply port 212b Bottom part 221 Support part 222 Guide wall part 223 Slit 231 Base end 232 Inclination 233 Inclination 233a Tip 234 Communication hole 234a End edge 234b End edge 234c Groove 311 Restriction 311a Inner edge 312 Outlet 321 Opening L1 Axis L2 Axis S Gap

Claims (5)

It has a conduit needle and a joint portion, and has a main body portion in which a flow path communicating with the conduit needle and the joint portion is formed.
The flow path is provided with a valve chamber that accommodates the spherical valve body so as to be swingable in the direction of the flow path.
The valve chamber
A supply port that is sealed when the spherical valve body comes into contact is provided on the conduit needle side.
When the spherical valve body comes into contact with the ball, the joint portion has a regulating portion that regulates the movement of the spherical valve body while forming a gap in the flow path.
A liquid transfer tool characterized by that. The supply port is formed in the shape of a circular hole having an inner diameter smaller than that of the spherical valve body.
The regulating portion projects from the inner peripheral surface of the valve chamber in one opposite direction, and the width of the gap between the opposing regulating portions is formed to be smaller than the outer diameter of the spherical valve body.
The liquid transfer tool according to claim 1. The liquid transfer tool according to claim 1 or 2, wherein the spherical valve body is formed so as to generate buoyancy with respect to the liquid flowing through the flow path. The liquid transfer tool according to any one of claims 1 to 3, wherein the conduit needle, the supply port, and the regulation unit are arranged on a coaxial line. From the main body portion, a guide wall portion is formed in a tubular shape around the axis on the conduit needle side connected via the support portion.
Slits are formed in the support portion and the guide wall portion in the radial direction with respect to the axis.
The liquid transfer tool according to claim 4.

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