TW201309279A - Three-way direction cock unit, check valve and fluid delivery device - Google Patents

Abstract

There are provided a three-way direction cock unit, check valve and fluid delivery device which are easily miniaturized with high qualified rate at low cost, comprising: a first casing having a valve seat which has an aperture; a second casing inserted into said first casing; and a valve body gripped between said valve seat and an opening edge of said second casing.

Description

Three-way stopcock unit, check valve and fluid substance conveying device

The present invention provides a three-way stopcock unit, a check valve disposed on the three-way stopcock unit, and a fluid substance conveying device provided with the three-way stopcock unit.

It is generally known that, for example, a method of supplying nutrients to a patient who cannot directly eat from the mouth is usually a method of directly feeding a fluid substance such as a nutritional composition to the stomach of the patient.

According to this method, a catheter is connected to the stomach of the patient, and a three-way stopcock unit is connected to the catheter. A container for storing a fluid substance is connected to the three-way stopcock unit, and a syringe is further connected. The fluid substance contained in the storage container is supplied to the catheter from the syringe once it is taken by the syringe. In this way, patients can be successfully fed with fluid substances.

As a device for supplying a fluid substance, for example, a device disclosed in Japanese Patent Laid-Open Publication No. Hei. According to the fluid substance conveying device of Patent Document 1, for example, a storage container such as a bag body, a syringe, and a catheter are respectively connected to the three-way connector. In the device, a check valve is disposed on a portion of the three-way connector that is connected to the conduit.

The check valve opens the valve seat opening when pressure is applied in one direction, and closes the opening when pressure is applied in the reverse direction.

As for the structure of the check valve, for example, the structure described in Japanese Patent Document 2 is known. According to the check valve of Japanese Patent Laid-Open No. 2, a valve body for opening and closing the valve seat is provided, and a mechanism for maintaining the inside of the check valve in a liquid-tight state (that is, a sealed state in which the fluid substance is not leaked) is provided. (such as O-rings, etc.).

However, the invention cited in Document 1 must have a mechanism for applying pressure to the valve body, a structure for supporting the valve body or the pressure applying mechanism, and the like, and therefore, the structure for using a portion of the flowing fluid substance becomes complicated. Chemical. On the other hand, the check valve described in the above-mentioned document 2 is provided with a valve body for opening and closing the valve seat, and a mechanism for holding the inside of the valve body in a liquid-tight state (for example, an O-ring), The structure is more complicated. Therefore, according to the apparatus described in the cited documents 1 and 2, there is a possibility that the check valve is difficult to be miniaturized, the yield of the finished product is low, and the manufacturing cost is increased.

Further, when a container such as a semi-solid agent is fed from a container to a catheter, a syringe is usually used, but there is a problem of a lot of trouble. Further, in view of hygiene, it is desirable to operate in a closed system (i.e., to prevent the fluid substance from contacting the outside air to connect the container to the three-way stopcock unit), but the previously used three-way stopcock unit is difficult to achieve.

The present invention has been developed in view of the prior art, and aims to provide a three-way stopcock unit, a check valve and a fluid substance conveying device, which are easy to miniaturize, have high yield of finished products, low manufacturing cost, and can ensure sanitary sealing. The system simply feeds a substance such as a semi-solid agent.

[Patent Document 1] Japanese Patent Laid-Open No. Hei 10-192395

[Patent Document 2] Japanese Patent Laid-Open No. Hei 05-321824

A three-way stopcock unit according to a first aspect of the present invention is characterized in that it has a branch flow path that engages a first flow path, a second flow path, and a third flow flow for flowing a flow at one junction point. a syringe for supplying an attractive force and an extrusion force to the branch flow path and provided on the third flow path, wherein the suction force causes the fluid substance to flow into the first flow path from the outside, and the extrusion force is from The second flow path allows the fluid material to flow out of the outside; the first valve portion is configured to prevent the fluid from flowing out of the first flow path and is disposed at an open end of the first flow path; and the second valve The second valve portion is configured to prevent the fluid from flowing into the second flow path and to be disposed at an open end of the second flow path. At least one of the first valve portion or the second valve portion includes a first outer casing having a first tubular portion for blocking a valve seat at one of the open ends of the first tubular portion, and a setting An opening in the valve seat; a second outer casing having a second cylindrical portion, the second cylindrical portion being inserted from the other open end side of the first cylindrical portion of the first outer casing; and a valve The valve body is formed by an elastic piece and is sandwiched by the valve seat of the first outer casing and the open end of the tubular portion of the second outer casing. The valve body has a slightly U-shaped slit formed on the outer periphery of the outer peripheral portion of the opening provided on the valve seat of the first outer casing and the inner periphery of the tubular portion of the second outer casing The inner portion of the split is used as an opening and closing valve, and the outer portion of the split is sealed in a liquid-tight state between the valve seat of the first outer casing and the tubular portion of the second outer casing.

In the first aspect of the invention, it is preferable that the cylindrical portion of the syringe is formed integrally with the third flow path.

In the first aspect of the invention, preferably, the first outer casing provided on the first valve portion is integrally formed with the first flow path.

In the first aspect of the invention, preferably, the second outer casing provided on the second valve portion is integrally formed with the second flow passage.

In the first aspect of the invention, it is preferable that at least one of the first valve portion or the second valve portion includes a tubular connecting member and a fastening claw portion for screwing or fitting to the other The connecting portion of the article is fastened to the other article in a state of being connected to the other article, so as to prevent the other article from falling off and being provided on the connecting member.

According to a first aspect of the invention, it is preferable that the connecting member is formed as a female member into which the other article can be inserted, and the inner surface of the connecting member is protruded so as to form an acute angle with respect to an insertion direction of the other component. Fasten the claws.

In the first aspect of the invention, it is preferable that at least one of the first valve portion or the second valve portion is formed by a male thread on one of an inner side surface of the first cylindrical portion and a side surface of the second cylindrical portion and Forming a female thread on the other surface, the first tubular portion is rotated in a specific direction and screwed into the second cylindrical portion, and has an anti-drop structure, allowing only the first tubular portion to rotate only in the specific direction Thereby, it is possible to prevent the second cylindrical portion from coming off the first cylindrical portion.

According to a first aspect of the invention, it is preferable that the fall-preventing structure has one or a plurality of locking claw portions formed on one of an inner side surface of the first cylindrical portion and an outer side surface of the second cylindrical portion, and One or a plurality of fastening projections formed on one surface; the fastening claw portion is formed to be inclined toward the opposite side of the specific direction, and the fastening convex portion is to be rotated in the specific direction when the first cylindrical portion is to be rotated Depressing the locking claw portion in a direction substantially perpendicular to the rotation direction, thereby allowing the first cylindrical portion to rotate, and rotating the first cylindrical portion in a direction opposite to the specific direction At this time, the first cylindrical portion is prevented from rotating by being engaged with the locking claw portion.

In the first aspect of the invention, preferably, the plunger portion of the syringe includes a plunger head and a plunger rod, and the plunger head is a substantially disk-shaped resin product that slides inside the cylindrical portion in a liquid-tight state. The plunger rod is a resin product integrally formed with the plunger head.

In the first aspect of the invention, preferably, the plunger portion of the syringe includes a plunger head that slides inside the cylindrical portion, a plunger rod that is coupled to the plunger head, and a buckle portion that is disposed at the plunger portion a base end portion of the plunger rod for engaging a user's finger to perform a movement operation of the plunger rod in the axial direction; and two flange portions parallel to the axial direction of the cylindrical portion of the syringe Set, there is a gap between the two that can reach the user's finger.

In the first aspect of the invention, it is preferable that the finger portion protrudes from the ring member provided on the plunger rod.

In the first aspect of the invention, preferably, the buckle portion includes a belt-shaped body portion formed of a bendable material, and a hook portion for fitting into a groove formed in the base end portion of the plunger rod Fixedly disposed at two ends of the body portion; the hook portion is alternately provided with one or a plurality of narrow embedded portions and one or a plurality of wide stopper portions, and the stopper portion is embedded in the embedded portion At the lower side of the groove, the base end portion abuts.

A check valve according to a second aspect of the present invention, comprising: a first outer casing having a first tubular portion, a valve seat for blocking one open end of the first tubular portion, and a valve seat provided at the valve seat a second outer casing having a second cylindrical portion, the second cylindrical portion being inserted from the other open end side of the first cylindrical portion of the first outer casing; and a valve body, the valve The body is formed by an elastic piece, and is sandwiched by the valve seat of the first outer casing and the opening end of the tubular portion of the second outer casing; the valve body has a slightly U-shaped slit, and the slit is formed in the same manner as the above The outer peripheral portion of the outer surface of the outer casing provided on the valve seat of the outer casing is biased outward and is opposite to the inner peripheral edge portion of the tubular portion of the second outer casing; the inner portion of the split is used as an opening and closing valve, and The valve seat of the first outer casing and the tubular portion of the second outer casing are sealed in a liquid-tight state on the outer portion of the split.

A fluid material conveying device according to a third aspect of the invention, comprising: the three-way stopcock unit according to the first aspect of the invention; and a container for storing a fluid substance flowing into the three-way stopcock unit from the first flow path, and And the second valve portion is connected; and a conduit for supplying the fluid substance to the inside of the human body and connected to the first valve portion.

In the present invention, the valve body is formed of an elastic body, and an opening and closing valve is provided at a central portion of the valve seat. Therefore, the flow path can be opened and closed by the elastic deformation of the valve body. Therefore, in the first aspect of the invention, it is not necessary to provide a pressing mechanism for opening and closing the valve body, and it is not necessary to provide a structure for supporting the valve body or the pressing mechanism. As a result, according to the first aspect of the invention, the structure can be simplified and downsized. Further, in the first aspect of the invention, when the first cylindrical portion of the first outer casing is inserted into the second cylindrical portion of the second outer casing, the valve body is sandwiched between the valve seat of the first outer casing and the opening of the second outer casing. As a result, the opening and closing valve of the valve body is opened when the pressure of the fluid is applied from the first outer casing side to the second outer casing side, and is closed when the pressure of the fluid is applied from the second outer casing side to the first outer casing side. Further, since the valve body is sandwiched between the valve seat of the first outer casing and the opening of the second outer casing, the valve seat and the opening are sealed in a liquid-tight state. As described above, according to the first aspect of the invention, the valve body provided between the valve seat and the opening of the second cylindrical portion functions as a check valve, and also has the liquid-tight state in which the joint portions of the first and second outer casings are maintained. Features. Therefore, according to the first aspect of the invention, it is possible to easily reduce the size of the valve, improve the yield of the check valve, and further reduce the manufacturing cost.

According to the first aspect of the invention, since the cylindrical portion of the syringe and the third flow path are integrally formed, the manufacturing cost can be reduced, the assembly work can be simplified, and the liquid leakage between the cylindrical portion and the third flow path can be reliably prevented.

According to the first aspect of the invention, since the first outer casing and the first flow path are integrally formed, the manufacturing cost can be reduced, the assembly work can be simplified, and the liquid leakage between the first outer casing and the first flow path can be reliably prevented.

According to the first aspect of the invention, since the second outer casing and the second flow path are integrally formed, the manufacturing cost can be reduced, the assembly work can be simplified, and the liquid leakage between the second outer casing and the second flow path can be reliably prevented.

According to the first aspect of the invention, the anti-drop structure for preventing the other articles from coming off is provided by screwing or fitting to the tubular connecting members of the other articles, and it is possible to reliably prevent the other articles from unexpectedly occurring. Further, for example, when another item is a storage container of a fluid substance, after all the fluid substances in the storage container are used up, it is not allowed to remove the storage container from the three-way stopcock unit and connect the new storage container. . For example, in the case of feeding a fluid substance to a patient, it is preferable to replace the three-way stopcock unit once the storage container is empty, in consideration of hygiene. In this case, according to the first aspect of the invention, it is possible to prevent the user from using the three-way stopcock unit a plurality of times due to mistakes.

Further, the use of the locking claw portion and the locking projection portion constitutes an anti-drop mechanism, whereby an anti-drop mechanism having low cost and high reliability can be obtained.

According to the first aspect of the invention, the plunger head can be formed in a liquid-tight state so as to be slidable inside the cylindrical portion, and the plunger head and the plunger rod are integrally formed, whereby the number of parts can be reduced, thereby reducing the manufacturing cost. .

In the first invention, the base end portion of the plunger rod is provided with a buckle portion and the cylindrical portion is provided with two flanges, and the operator buckles the thumb in the buckle portion and the two flange portions Stretch the index finger and the middle finger of one hand, hold the three-way stopcock unit, and squeeze the plunger of the syringe with only one hand. Thereby, it is possible to provide a three-way stopcock unit with good operability.

According to the second aspect of the invention, for the same reason as the first invention described above, it is possible to provide a check valve which is small in size, excellent in the yield of the finished product, and low in manufacturing cost.

According to the third aspect of the invention, for the same reason as the first invention described above, it is possible to provide a fluid substance conveying device which is small in size, excellent in the yield of the finished product, and low in manufacturing cost.

[Example 1]

Embodiment 1 of the present invention is shown in Figs. 1 to 6 .

The fluid substance transport device 100A according to the first embodiment of the present invention is for transporting a fluid substance stored in the bag body 2A to a catheter for a patient. In other words, the fluid substance delivery device 100A is used to feed a nutrient composition such as a liquid, a gel, a sol, or a mixture thereof with a solid component to a part (not shown) of the patient.

The fluid substance delivery device 100A includes a three-way stopcock unit 1A, a bag body 2A for accommodating a fluid substance, and a delivery catheter 3 for conveying a fluid substance to the inside of the human body.

The three-way stopcock unit 1A is formed of a material having rigidity and liquid tightness, such as a resin material such as polypropylene. The three-way stopcock unit 1A includes a branch flow path 4, a first valve portion 5A, a second valve portion 6A, and a syringe 7A, that is, functions as a so-called three-way valve.

The branch flow path 4 is joined to the first flow path 8, the second flow path 9, and the third flow path 10 at one junction point 11. The flow paths 8, 9, and 10 are each configured to flow a fluid inside. In the first embodiment, each of the flow paths 8, 9, and 10 is formed to have a length of, for example, about 0.6 to 1.0 cm, and may be longer or shorter than the length.

The first valve portion 5A is disposed at an end portion of the first flow path 8 of the branch flow path 4. As shown in FIG. 2, the first valve portion 5A includes a first check valve portion 12A serving as a "check valve" and a connecting portion 13.

The first check valve portion 12A includes a first outer casing 14, a second outer casing 20, and a valve body 26.

The first outer casing 14 is disposed at an end of the first flow path 8 and is integrally formed with the first flow path 8. The first outer casing 14 has a valve seat 15 having a substantially disk shape and a first cylindrical portion 17. An inflow port 16 is formed in a substantially central portion of the valve seat 15, and serves as an "opening" for connecting the first flow path 8. The valve seat 15 is provided with a valve body as will be described later. The peripheral portion of the valve seat 15 is joined to one end of the first cylindrical portion 17. The first cylindrical portion 17 has a substantially cylindrical shape and is disposed in the extending direction of the first flow path 8. The inner circumference of the first cylindrical portion 17 is provided with a female thread 18A. A slightly circular opening 19 is formed on the other end side of the first cylindrical portion 17.

The second outer casing 20 is formed using the same material as the first outer casing 14. The second outer casing 20 is detachably mounted relative to the first outer casing 14. The one end side of the second outer casing 20 is provided with a substantially disc-shaped intermediate wall portion 21. Further, an outflow port 22 communicating with a connecting portion as will be described later is formed at a substantially central portion of the intermediate wall portion 21. The intermediate wall portion 21 is provided on one end side of the second cylindrical portion 23. The second cylindrical portion 23 has a substantially cylindrical shape. The outer diameter of the second cylindrical portion 23 is substantially the same as the inner diameter of the first cylindrical portion 17. The outer peripheral surface of the second cylindrical portion 23 is provided with a male screw 24A for screwing with the female screw 18A. A slightly circular opening 25 is formed on the other end side of the second cylindrical portion 23.

The valve body 26 shown in Figs. 4(a) and (b) is formed of a liquid-tight elastomer such as a crucible. The overall shape of the valve body 26 is slightly rounded.

The valve body 26 is provided with a slightly U-shaped slit 27. As shown in FIG. 4, the slit 27 is formed in a notch shape having a gap W. The valve body 26 is clamped between the valve seat 15 and the opening 25 of the second outer casing 20. As shown in FIG. 4, the slit 27 is disposed on the inner side of the position where the inner peripheral edge portion 28 of the opening 25 abuts, and is disposed outwardly from the position of the inflow port 16 of the valve seat 15.

The inside of the slit 27 functions as an opening and closing valve 29. That is, when the valve body 26 is disposed on the valve seat 15, the opening and closing valve 29 operates in the rotational direction with the hypothetical line 30 (refer to FIG. 4) connecting the both ends of the split 27 for opening and closing the inlet 16 . As shown in Fig. 4 (b), in the present embodiment, the thickness of the opening and closing valve 29 is formed to be thicker near the center and gradually thinner at the peripheral portion. Thereby, when opening and closing, it is possible to prevent the opening and closing valve 29 from being bent and failing to function normally. Further, when the valve body 26 is manufactured and the plurality of valve bodies 26 are simultaneously cleaned, the valve bodies 26 can be prevented from sticking to each other.

The diameter of the valve body 26 is almost equal to the inner diameter of the first outer casing 14, for example, about 1.5 cm. Further, the thickness of the valve body 26 is, for example, about 1.0 mm at the peripheral portion, and the thickest portion of the opening and closing valve 29 is about 2.0 mm. However, the diameter and thickness of the valve body 26 may be larger or smaller than the size.

Alternatively, a valve body having a substantially uniform thickness may be used instead of the valve body 26 of Fig. 4(b).

The connecting portion 13 is protruded from the opposite side of the intermediate wall portion 21 of the second outer casing 20. The second outer casing 20 is formed integrally with the connecting portion 13. The connecting portion 13 has a substantially cylindrical shape, and the outer diameter gradually decreases toward the front end. A plurality of (for example, four) anti-slip members 32 having a slightly wedge-shaped cross section are protruded from the outer peripheral surface of the connecting portion 13. The slip preventing member 32 is disposed in a ring shape along the outer circumference of the connecting portion 13. The cross-sectional shape of the slip preventing member 32 is suitable for preventing the conveying duct 3 connected to the connecting portion 13 from coming off, and the shape other than the wedge shape may be used. Further, the arrangement shape of the slip preventing member 32 is not limited to the annular shape, and may be provided only in one of the diameter directions.

The second valve portion 6A is provided at an end portion of the second flow path 9 of the branch flow path 4. The second valve portion 6A includes a second check valve portion 33A serving as a "check valve" and a connecting portion 34 serving as a "connecting member".

The second check valve portion 33A includes a first outer casing 35, a second outer casing 36, and a valve body 26.

The first outer casing 35 and the connecting portion 34 are integrally formed using the same material as the branch flow path 4. A valve plate 37 having a substantially disk shape is provided at one end of the first outer casing 35. Further, an inflow port 38 is formed in a substantially central portion of the valve seat 37, and serves as an "opening" connected to the connecting portion 34. The first outer casing 35 includes a first cylindrical portion 39, a female screw 40A, and an opening 41. The structure, dimensions, materials, and the like of the respective portions are the same as those of the first tubular portion 17, the female screw 18A, and the opening 19.

The second outer casing 36 is provided at an end of the second flow path 9, and is integrally formed with the second flow path 9. The second outer casing 36 includes an intermediate wall portion 42, an outflow port 43, a second cylindrical portion 44, a male screw 45A, and an opening 46. The intermediate wall portion 42 has a substantially circular plate shape. An outlet port 43 is provided at a substantially central portion of the intermediate wall portion 42. The outflow port 43 is connected to the second flow path 9. The structure, size, material, and the like of the second cylindrical portion 44, the male screw 45A, and the opening 46 are the same as those of the second cylindrical portion 23, the male screw 24A, and the opening 25.

The structure, size, material, and the like of the valve body 26 are the same as those of the valve body 26 disposed on the first check valve portion 12A. When the valve body 26 is disposed on the valve seat 37, the opening and closing valve 29 operates in the rotational direction with the line 30 as an axis, and opens and closes the inlet 38.

The connecting portion 34 is disposed on the opposite side of the first outer casing 35 of the valve seat 37. The connecting portion 34 is a female member that can be inserted into the discharge portion of the bag body 2A (as will be described later). The connecting portion 34 includes a tubular portion 48, a female screw 49, an opening 50, a fastening claw portion 51, and a protruding portion 52.

The tubular portion 48 is disposed on an extension line of the first cylindrical portion 39 provided on the first outer casing 35, and is formed in the same cylindrical shape as the first tubular portion 39. A female thread 49 is provided on the inner circumference of the tubular portion 48. A slightly circular opening 50 is formed in the front end of the tubular portion 48.

A fastening claw portion 51 is provided on the opening 50. As shown in FIG. 3, the engaging claw portion 51 is constituted by a plurality of slightly triangular projections which are acutely inclined with respect to the direction of the inflow opening 38 shown in FIG. 2 (i.e., the insertion direction of the bag body 2A). On the inside. As will be described later, the engaging claw portion 51 is engaged with the discharge portion (as will be described later) when the discharge portion (described later) of the bag body 2A is inserted into the connecting portion 34, and has the bag body 2A from being blocked. The connection portion 34 is detached.

As shown in FIGS. 2 and 3, the protruding portion 52 is formed in a substantially triangular plate shape. The protrusion 52 is on the back side of the valve seat 37, the plate surface is substantially perpendicular to the valve seat 37, and the front end portion 53 is protruded toward the opening 50 side.

The syringe 7A includes a cylindrical portion 54 and a plunger portion 55 that is inserted into the inside of the cylindrical portion 54.

The cylindrical portion 54 is formed integrally with the third flow path 10 at the end of the third flow path 10. The cylindrical portion 54 includes a cylindrical body portion 56, an outflow inlet 57, an opening end portion 58, a first flange portion 59, and a second flange portion 60.

The cylindrical body portion 56 is formed in a substantially cylindrical shape. In the first embodiment, the cylindrical main body portion 56 is formed to have a length of about 9 to 10 cm and a diameter of about 2 cm. However, the length or diameter may be larger or smaller than the size.

The outflow inlet 57 is formed on one end side of the cylindrical portion 54, and communicates with the third flow path 10. The open end portion 58 is formed on the other end side of the cylindrical body portion 56. The diameter of the open end 58 is substantially the same as the inner diameter of the cylindrical body portion 56. The first flange portion 59 protrudes outward in the diameter direction from the opening end portion 58. The second flange portion 60 is disposed closer to the center than the first flange portion 59 and is provided in parallel with the first flange portion 59. As shown in FIG. 2, the interval L1 between the first flange portion 59 and the second flange portion 60 is set to a length in which the user's finger (for example, the index finger and the middle finger) can be inserted into the operation of the syringe 7A, for example, about 2 to 3 cm.

The plunger portion 55 is formed into a single body using the same material as the cylindrical portion 54. The plunger portion 55 includes a plunger head 61, a plunger rod 62, and an annular member 63 serving as a "knuckle portion". The ring member 63 is provided on the base end portion 64 of the plunger rod 62.

The plunger head 61 is formed in a disk shape having substantially the same diameter as the inner circumference of the cylindrical body portion 56. There is no gasket on the plunger head 61. However, when the plunger head 61 slides on the inner peripheral portion of the cylindrical body portion 56, the inner wall surface of the cylindrical body portion 56 can be sealed. Therefore, high fluid tightness can be obtained by the abutting portion of the plunger head 61 and the cylindrical body portion 56.

The plunger rod 62 is formed in an elongated rod shape having a slightly cross-shaped cross section. The entire length of the plunger rod 62 is set to be longer than the entire length of the cylindrical body portion 56. Therefore, when the plunger head 61 is inserted into the deepest portion of the cylindrical body portion 56, the ring member 63 on the proximal end portion 64 side is in a state of being exposed from the cylindrical body portion 56 to the outside. As shown in Fig. 2, the inner diameter L2 of the ring member 63 is set to be a length that can be inserted into a user's finger (e.g., a thumb) to operate the syringe 7A, for example, about 2 to 3 cm in diameter.

As for the bag body 2A used as the "storage device", any container can be used if it can accommodate a container for a fluid substance. As shown in Fig. 5, in the first embodiment, a resin-made flexible container is used as the bag body 2A. A cylindrical discharge portion 65 is provided as one of "other articles" on one of the end portions of the bag body 2A. The discharge portion 65 is configured to be fluid-tightly connected to the connection portion 34 of the second valve portion 6A. A male screw 66 for screwing with the female screw 49 is formed on the outer peripheral surface of the discharge portion 65. Further, the opening 67 of the end portion of the discharge portion 65 is sealed by the sealing member 68. As the sealing member 68, a film-like substance that prevents oxidation or rot of a fluid substance contained in the bag body 2A, for example, an aluminum foil or the like can be used.

Next, the assembly procedure of the fluid substance conveying device 100A of the first embodiment will be described.

In the case of assembling the fluid substance conveying device 100A shown in FIG. 2, first, the user places the valve body 26 on the valve seat 15 of the first outer casing 14, and then, by the female thread 18A and the second outer casing 20 The thread 24A is screwed to assemble the first valve portion 5A. Next, the valve body 26 is placed on the valve seat 37 of the first outer casing 35, and the second valve portion 6A is assembled by screwing the female screw 40A with the male screw 45A of the second outer casing 36. At this time, as shown in FIG. 5, the valve body 26 of the first valve portion 5A is sandwiched between the valve seat 15 and the opening 25. Similarly, the valve body 26 of the second valve portion 6A is clamped between the valve seat 37 and the opening 46. By adjusting the screwing state of the female threads 18A, 40A and the male threads 24A, 45A, the clamping state of the valve body can be freely adjusted, whereby leakage of the fluid substance can be reliably prevented.

Further, the plunger portion 55 is inserted into the cylindrical portion 54, and the syringe 7A is assembled.

Next, the operation procedure of the fluid substance conveying device 100A of this embodiment will be described.

As shown in FIG. 5, the user abuts the discharge portion 65 of the bag body 2A in which the fluid substance is accommodated, and abuts the connection portion 34 of the second valve portion 6A to rotate. Thereby, the female thread 49 is screwed with the male thread 66, and the front end portion 53 of the projection portion 52 gradually approaches the sealing member 68 to puncture the sealing member 68. As a result, the opening 67 is exposed. The female thread 49 is further screwed with the male thread 66, and the connection between the discharge portion 65 and the second valve portion 6A is completed. As shown in FIG. 6, the front end of the engaging claw portion 51 provided on the connecting portion 34 is engaged to the yoke. The state of the end of the thread 66. As a result, the male screw 66 cannot be rotated in the direction in which the screwing can be released. That is, once the bag body 2A is attached to the three-way stopcock unit 1A, it is impossible to disengage the two thereafter. Thereby, it is possible to reliably prevent other items that are engaged to the three-way stopcock unit 1A from accidentally falling off or the like.

Next, the user inserts the connecting portion 13 of the first valve portion 5A into one end of the delivery catheter 3. Thereby, as shown in FIG. 6, the delivery duct 3 is connected to the connection part 13. In this state, the slip preventing member 32 of the connecting portion 13 exerts a strong frictional force on the inner wall of the conveying duct 3, so that the conveying duct 3 is less likely to be detached from the connecting portion 13.

In this state, the other end of the delivery catheter 3 is connected to a catheter (not shown) placed on the patient.

Thereafter, the user feeds the fluid to the patient by operating the syringe 7A. Specifically, first, the user pulls the plunger rod 62 in a direction in which the plunger head 61 is pulled out from the outflow inlet 57. Thereby, the air pressure in the branch flow path 4 is lower than the atmospheric pressure. Therefore, the opening and closing valve 29 of the first check valve portion 12A is closed to block the inflow port 16. Further, the opening and closing valve 29 of the second check valve portion 33A is opened, and the inflow port 38 is opened. As a result, the fluid substance is sucked from the inside of the bag 2A, and is transported into the cylindrical portion 54 of the syringe 7A via the first flow path 8 and the third flow path 10.

Next, the user presses the plunger rod 62 in the direction in which the plunger head 61 approaches the outflow port 57. Thereby, the pressure in the branch flow path 4 is higher than the atmospheric pressure. Therefore, the opening and closing valve 29 of the second check valve portion 33A is closed to block the inflow port 38. Further, the opening and closing valve 29 of the first check valve portion 12A is opened, and the inflow port 16 is opened. As a result, the fluid substance is extruded from the cylindrical portion 54, and is supplied to the patient through the third flow path 10, the second flow path 9, the second valve portion 6A, and the delivery catheter 3.

When the plunger head 61 moves in the suction direction and the extrusion direction, the plunger head 61 slides inside the cylindrical portion 54 in a liquid-tight state. Therefore, liquid leakage does not occur between the plunger head 61 and the cylindrical portion 54.

When the plunger head 61 is moved, the user inserts two fingers of one hand (for example, the index finger and the middle finger of the right hand) between the first flange portion 59 of the syringe 7A and the second flange portion 60, and uses the finger grips. Cylinder portion 54. Furthermore, the user inserts another finger of the same hand (for example, the thumb of the right hand) into the ring member 63 of the plunger portion 55. In this state, by the operation of pulling or pressing the plunger portion 55, the user can hold and operate the syringe 7A with only one hand. That is, according to the first embodiment, it is possible to provide the three-way stopcock unit 1A and the fluid substance conveying device 100A which have good operability.

As shown in FIG. 4, a gap W is formed in the slit 27 of the valve body 26. Therefore, when the opening and closing valve 29 is closed, the opening and closing valve 29 overlaps with the peripheral portion of the valve body 26, and it is possible to avoid an unfavorable situation in which the inflow ports 16 and 38 are not sealed in a liquid-tight state.

After the fluid substance conveying device 100A is used, the delivery catheter 3 is pulled out from the connection portion 13. At this time, the three-way stopcock unit 1A and the bag body 2A are subjected to disposal processing in a state of being connected to each other. As described above, the male claw 66 of the bag body 2A is fastened to the engaging claw portion 51 of the connecting portion 34, and therefore, the bag body 2A cannot be detached from the three-way stopcock unit 1A.

When the fluid substance delivery device 100A is used for feeding a patient, the fluid substance delivery device 100A is prohibited from being used in a circle in consideration of hygiene, and it is preferable to dispose the fluid substance delivery device once the bag 2A is empty. 100A. For this reason, it is preferable that the branching flow path 4 is not detached after the connection portion 13 or the discharge portion 65 is loaded. In the first embodiment, by using the engaging claw portion 51 or the like, a simple and inexpensive structure can be employed, and the connection portion 13 or the discharge portion 65 can be reliably prevented from being detached. Therefore, according to the first embodiment, it is possible to reliably prevent the three-way stopcock unit 1A from being discarded and reused, and it is possible to ensure a good sanitary state of the patient.

As described above, in the first embodiment, when the plunger portion 55 of the syringe 7A is pulled, the first valve portion 5A is closed, and the second valve portion 6A is opened. On the other hand, when the plunger portion 55 is pressed, the first valve portion 5A is opened, and the second valve portion 6A is closed. Therefore, the first valve portion 5A is connected to the delivery catheter 3 and the second valve portion 6A is connected to the bag body 2A, whereby the fluid substance can be fed to the patient.

In the first embodiment, the opening and closing valve 29 is formed such that the elastic valve body 26 is provided with a slightly U-shaped slit, and the opening and closing valve 29 is opened and closed at the central portion of the valve seats 15, 37. Flow inlets 16, 38. Therefore, the inlets 16, 38 can be opened and closed only by the elastic deformation of the opening and closing valve 29. Therefore, according to the first embodiment, it is not necessary to provide a pressing mechanism for opening and closing the valve body 26. Further, it is not necessary to provide a structure for supporting the valve body 26 and the pressing mechanism. For these reasons, according to the first embodiment, the structure of the three-way stopcock unit 1A can be simplified and reduced in size.

Further, according to the first embodiment, the valve body 26 is interposed between the valve seats 15, 37 of the first outer casings 14, 35 and the openings 25, 41 of the second outer casings 20, 36. As a result, the opening and closing valve 29 of the valve body 26 is opened when fluid pressure is applied from the side of the first outer casings 14, 35 toward the second outer casings 20, 36, and the first outer casings 14, 35 are laterally from the second outer casings 20, 36. Closed when fluid pressure is applied to the side. Further, the valve body 26 is sandwiched between the valve seats 15, 37 of the first outer casings 14, 35 and the openings 25, 41 of the second outer casings 20, 36, so that between the valve seats 15, 37 and the openings 25, 41 The seal is in a liquid tight state. As described above, according to the first embodiment, the valve body 26 provided between the valve seats 15, 37 and the openings 25, 41 can simultaneously function as a check valve, and the joint portion of the first and second outer casings can be kept liquid. The function of the dense state. Therefore, according to the first embodiment, it is possible to easily reduce the size of the check valve, improve the yield of the check valve, and further reduce the manufacturing cost.

In the first embodiment, the branch flow path 4 is integrally formed with the cylindrical portion 54 of the syringe 7A, the first outer casing 14 of the first valve portion 5A, and the second outer casing 36 of the second valve portion 6A. As a result, according to the first embodiment, the manufacturing cost can be reduced, and the assembly work can be simplified. Further, according to the first embodiment, it is possible to reliably prevent liquid leakage between the cylindrical portion and the branch flow path 4, between the first valve portion 5A and the branch flow path 4, and between the second valve portion 6A and the branch flow path 4.

In the first embodiment, the plunger portion 61 and the plunger rod 62 are provided in the plunger portion 55 of the syringe 7A, and the plunger head 61 slides inside the cylindrical portion 54 in a liquid-tight state, and is slightly rounded. The resin is formed. Thereby, it is possible to ensure liquid tightness without providing a gasket on the plunger head 61. As a result, the plunger portion 55 is integrally formed as one piece. Therefore, the three-way stopcock unit 1A that avoids liquid leakage from the plunger portion 55 can be manufactured inexpensively.

In the first embodiment, the connecting portion 34 is formed as a female member into which the discharge portion 65 of the bag body 2A can be inserted. Further, in the first embodiment, the engaging claw portion 51 is formed so as to protrude from the inside of the opening 50 of the connecting portion 34. As a result, according to the first embodiment, by engaging the claw portions 51, it is possible to reliably prevent the connection of the discharge portion 65 from coming off.

In the first embodiment, the ring member 63 projecting from the plunger rod 62 is provided as a finger portion. Therefore, the operability of the three-way stopcock unit 1A and the fluid substance conveying device 100A can be improved.

In the fluid material conveying device 100A of the first embodiment, the bag body 2A and the conveying pipe 3 are connected to the three-way stopcock unit 1A of the embodiment, so that the size is easy to be reduced, the yield of the finished product is high, and the manufacturing cost is low.

[Embodiment 2 of the invention]

Fig. 7 shows a second embodiment of the invention.

In the fluid substance transporting device 100B of the second embodiment, the configuration of the syringe 7B provided in the three-way stopcock unit 1B is different from that of the syringe 7A of the first embodiment. In the syringe 7B of the second embodiment, the plunger head 72 of the plunger portion 71 is provided with a gasket 73. Further, one end portion 76 of the cylindrical body portion 75 is formed in a shape substantially the same as the shape of the end portion of the plunger head 72. The other configuration is the same as that of the first embodiment.

According to the second embodiment, since the gasket 73 is provided on the plunger head 72, the liquid tightness between the inside of the cylindrical portion 74 and the plunger portion 71 can be easily ensured. Therefore, it is not necessary to produce the plunger head 72 with high precision.

[Embodiment 3 of the invention]

Fig. 8 and Fig. 9 show a third embodiment of the invention.

As shown in Fig. 8, the fluid material conveying device 100C of the third embodiment includes a second valve portion 6B and a bag body 2B instead of the second valve portion 6A and the bag body 2A of the first and second embodiments. The second valve portion 6A is provided with a connecting portion 82, and the bag body 2B is provided with a discharge portion 86.

The connecting portion 82 is for inserting a male member in the bag body 2B. The connecting portion 82 includes a tubular portion 83. A male screw 84 is formed on the outer peripheral surface of the tubular portion 83. Further, an opening 85 is provided at the front end of the tubular portion 83.

The discharge portion 86 of the bag body 2B includes a female screw 87 provided on the inner peripheral surface. The female thread 87 is formed to be screwable with the male thread 84. A resin top cover member 88 is disposed on the outer side of the discharge portion 86.

Further, the fluid material conveying device 100C of the third embodiment includes the first check valve portion 12B and the second check valve portion 33B instead of the first check valve portion 12A and the second of the first and second embodiments. The valve portion 33A is stopped. The first check valve portion 12B and the second check valve portion 33B are provided with recessed fitting portions 18B and 45B and projecting fitting portions 24B and 40B, respectively, instead of the above-described embodiments 1 and 2. Threads 18A, 40A and male threads 24A, 45A. The other configuration is almost the same as that of the second embodiment.

As shown in FIG. 9, when the first check valve portion 12B and the second check valve portion 33B are assembled, the fitted portion 18B is fitted to the fitting portion 24B, and the fitted portion 40B and the fitting portion are brought together. 45B phase fitting. Further, when the connecting portion 82 is connected to the discharge portion 65, the top cover member 88 of the bag body 2B is removed, and the male screw 84 is screwed to the female screw 87. Thereby, the sealing member 68 of the bag body 2B is broken, and the discharge portion 86 can be connected to the second valve portion 6B. The other operations are almost the same as those in the first embodiment.

Further, in the third embodiment, the configuration of the syringe is the same as that of the second embodiment, but the syringe 7A similar to that of the first embodiment described above may be employed.

The second valve portion 6B and the bag body 2B of the third embodiment can also be applied to a three-way stopcock unit having the female threads 18A and 40A and the male threads 24A and 45A as shown in the first and second embodiments, and the fluidity conveying device. .

Further, the fitted portions 18B and 45B and the fitting portions 24B and 40B of the third embodiment can be applied to the three-way stopcock unit having the second valve portion 6A and the bag body 2A as shown in the first and second embodiments. And a fluid delivery device.

[Embodiment 4 of the invention]

Fig. 10 and Fig. 11 show a fourth embodiment of the invention.

As shown in Fig. 10, the fluid material conveying device 100D of the fourth embodiment includes a second valve portion 6C and a bag body 2C, in place of the second valve portions 6A, 6B and the bag bodies 2A, 2B of the first to third embodiments. . The second valve portion 6A is provided with a connecting portion 92, and the bag body 2C is provided with a discharge portion 91.

The connecting portion 92 is a female member that is rotatable in the axial direction. A female screw (not shown) is engraved on the inner circumferential surface of the cylindrical body portion of the connecting portion 92.

The discharge portion 91 has a cylindrical discharge body portion 95. A male screw 94 is formed on the outer peripheral surface of the discharge body portion 95. The male thread 94 is screwed to a female thread (not shown). Further, the outer side of the discharge main body portion 95 is covered with a resin-made top cover member 96. The top cover member 96 is provided with a front end portion 97. The front end portion 97 is inserted into the inner side of the discharge body portion 95. The inside of the bag body 2C is adjacent to the discharge body portion 95, and a resin front end protection portion 98 is provided.

The other configuration is the same as that of the third embodiment.

As shown in FIG. 11, when the connection portion 92 is connected to the discharge portion 91, first, the distal end protection portion 98 is broken from the outer side of the bag body 2C, and the distal end protection portion 98 is separated from the discharge main body portion 95. Thereby, the top cover member 96 can be detached from the discharge body portion 95. After the top cover member 96 is pulled out, the male screw 94 is screwed to the female screw (not shown). Thereby, the discharge portion 91 is connected to the second valve portion 6C.

Further, for a patient who consumes a fluid substance from the mouth, a fluid substance may be directly administered from the bag body 2C. In this case, the top cover member 96 may be screwed to the discharge main body portion 95 so that the front end portion 97 is located outside.

The other operations are almost the same as those of the first to third embodiments.

In the fourth embodiment, the configuration of the syringe is the same as that of the second embodiment, but the syringe 7A similar to the first embodiment described above can be used.

Further, the second valve portion 6A and the bag body 2A shown in the first and second embodiments may be used instead of the fitted portions 18B and 45B and the fitting portions 24B and 40B.

[Embodiment 5 of the invention]

Fig. 12 to Fig. 16 show a fluid substance conveying device 100E according to the fifth embodiment of the present invention. In FIGS. 12 to 16, the same components as those in FIGS. 1 and 2 are attached, and the same constituent elements as those in FIGS. 1 and 2 are shown.

As shown in Fig. 12, in the three-way stopcock unit 1E of the fifth embodiment, the first valve portion 5B is disposed at a position opposite to the syringe 7A, and is orthogonal to the line connecting the syringe 7A and the first valve portion 5B. A second valve portion 6D is disposed thereon.

Therefore, compared with the above-described first embodiment, the fluid resistance of the fluid material can be increased when it is sucked into the syringe 7A (that is, when the user pulls the plunger rod 62), but when it is extruded from the syringe 7A (ie, The fluid resistance of the user when pressing the plunger rod 62 is reduced. The positional relationship between the syringe 7A, the first valve portion 5B, and the second valve portion 6D can be appropriately selected depending on the use of the fluid substance conveying device, the type of the fluidity substance, and the like.

Further, as shown in Fig. 13, the three-way stopcock unit 10E of the fifth embodiment includes the fall prevention mechanisms 210, 220, and 230. Hereinafter, the anti-drop mechanism of the fifth embodiment will be described by taking the anti-drop mechanism 210 as an example.

As shown in FIGS. 13 and 14, the fall prevention mechanism 210 is provided on the second valve portion 6D. The fall prevention mechanism 210 is provided with the fastening claw part 211 and the latching convex part 212.

The locking claw portion 211 is formed in plural on the inner side surface of the first cylindrical portion 39. The number or arrangement position of the locking claw portions 211 may be arbitrary, but in view of operability, it is preferable to form the entire circumference of the inner side surface. The locking claw portion 211 is formed in a state of being inclined to the opposite side of the specific rotation direction. In other words, the inclination angle θ1 (see FIG. 15( a )) of the buckle claw portion 211 is set to be less than 90 degrees.

The latching protrusions 212 are formed in plural on the outer side surface of the second cylindrical portion 44. The number or arrangement position of the latching projections 212 can be arbitrary. In the fifth embodiment, the locking convex portion 212 is formed in a slightly triangular shape. Further, the locking convex portion 212 is formed to have an inclination angle θ2 on the side in the specific rotation direction (here, the first cylindrical portion 39 and the second cylindrical portion 44 are screwed together, the direction in which the first cylindrical portion 39 is rotated). 90 degrees, and the inclination angle θ3 on the opposite side is formed as an acute angle (refer to Fig. 15 (a)).

The principle of the fall prevention mechanism 210 will be described with reference to FIGS. 13 and 15 .

As in the first embodiment, when the second valve portion 6D is assembled, the user fits the front end portion of the first cylindrical portion 39 into the front end portion of the second cylindrical portion 44 in a specific direction (arrow of Fig. 15 (a) A direction) to make it rotate. Thereby, the male screw 45A and the female screw 18A are screwed together, the front end portion of the first cylindrical portion 39 is close to the base end portion of the second cylindrical portion 44, and then the locking claw portion 211 and the locking projection portion 212 are coincident. status.

At this time, the locking convex portion 212 presses the locking claw portion 211 to the diameter direction. Therefore, the buckle claw portion 211 is deformed on the side of the first cylindrical portion 39. Thereby, the first tubular portion 39 can be allowed to rotate.

On the other hand, when the first tubular portion 39 is to be removed from the second tubular portion 44, the user should rotate the first tubular portion 39 in the direction B (see FIG. 15(b)). At this time, the locking convex portion 212 prevents the locking claw portion 211 from being deformed in the diameter direction. That is, the latching projection 212 is engaged with the latching claw portion 211 to prevent the first tubular portion 39 from rotating. As described above, the first cylindrical portion 39 and the second cylindrical portion 44 are screwed by the male screw 45A and the female screw 18A. Therefore, if the first tubular portion 39 cannot be rotated, the first tubular portion 39 cannot be removed from the second tubular portion 44. Therefore, after the first and second outer casings 35, 36 of the second valve portion 6D are engaged, the first and second outer casings 35, 36 cannot be separated.

Further, the configuration of the locking claw portion 221 and the locking convex portion 222 of the fall prevention mechanism 220, or the configuration of the locking claw portion 231 and the locking convex portion 232 for forming the fall prevention mechanism 230, and the falling prevention portion 232 The mechanism 210 is the same.

As described above, in the fifth embodiment, the use of the locking claw portion 211 and the locking projection portion 212 constitutes the fall prevention mechanism 210, and a simple and inexpensive structure can be employed, and the connection portion 13 or the discharge portion 65 can be reliably prevented from coming off.

Fig. 16 is a view showing the structure of the finger band member 240 of the fifth embodiment.

As shown in FIG. 16, the buckle finger member 240 of the fifth embodiment includes a main body portion 241 and a hook portion 242. The body portion 241 and the hook portion 242 are integrally formed into a strip shape using a bendable material. As the material for forming the finger band member 240, for example, an elastomer resin can be used.

The length, width, hardness, and the like of the body portion 241 are specified in consideration of the ease of operation of the plunger by the user or the fact that the inserted finger does not feel pain.

The hook portion 242 is provided on both end portions of the body portion 241. The hook portions 242 are provided with a narrow fitting portion 243. Further, each of the hook portions 242 includes a plurality of pairs of stopper portions 244 and 244 that protrude symmetrically in the right and left direction. The insertion portion 243 is formed on the hook portion 242 in interaction with the stopper portion 244.

The fitting portion 243 is fitted into the groove 64a formed on the base end portion 64 of the plunger rod 62. When any of the fitting portions 243 is fitted into the groove 64a, the pair of stopper portions 244, 244 directly under the fitting portion 243 are used to fix the finger band member 240. Thus, by forming a plurality of the embedded portions 243 and the stopper portions 244 by interaction, the diameter of the buckle finger member 240 can be freely adjusted.

As described above, in the fifth embodiment, the plunger rod 62 and the finger band member 240 are separately formed, and the hook portion 242 is used for joining. Thus, the plunger rod 62 can be formed using a highly rigid material while the buckle finger member 240 can be formed using a soft material. Therefore, it is possible to prevent the user from feeling pain in the fingers and the like, and to achieve comfortable operability.

Further, the diameter of the buckle finger member 240 can be freely adjusted according to the thickness of the user's finger or the like, and the operability can be improved in this respect.

Further, the structure of the three-way stopcock unit 100E shown in Fig. 12 can also be applied to the fluid substance conveying apparatuses of the above-described first to fourth embodiments.

Further, the structure of the fall prevention mechanism 210 shown in Figs. 13 and 14 can be applied to the fluid substance transporting apparatuses of the above-described first to fourth embodiments.

Further, the structure of the finger band member 240 shown in Fig. 16 can also be applied to the fluid substance conveying devices of the above-described first to fourth embodiments.

Although the embodiments of the present invention have been described above, the present invention is not limited to the first to fifth embodiments.

For example, in the above-described first to fifth embodiments, the check valve of the present invention is used in both the first check valve portion 12A and the second check valve portion 33A, but only the two check valve portions 12A may be used. The check valve of the present invention is used on either of 33A.

Further, in the above-described first to fifth embodiments, the outer peripheral portion of the connecting portion 13 is provided with the anti-slip member 32. However, the anti-slip member 32 may not be provided on the connecting portion 13.

Further, in the above-described first to fifth embodiments, the first outer casing 14 of the first valve portion 5 and the second outer casing 36 of the second valve portion 6 are integrally formed with the branch flow path 4, but the components may not be integrally formed. After joining separately, they are joined to each other. Further, the syringe 7A and the branch flow path 4 may be separately formed and joined to each other.

The buckle portion is not limited to the above-described ring member 63 or the buckle finger member 240 as long as it can be inserted into the user's finger to facilitate the operation of the plunger portion 55.

100A, 100B, 100C, 100D, 100E. . . Fluid material delivery device

1A, 1B, 1C, 1D. . . Three-way stopcock unit

2A, 2B, 2C. . . Bag body

3. . . Conveying catheter

4. . . Branch flow path

5A, 5B. . . First valve

6A, 6B, 6C, 6D. . . Second valve

7A, 7B. . . syringe

8. . . First flow

9. . . Second flow path

10. . . Third flow path

11. . . Confluence point

12A, 12B. . . First check valve (check valve)

13. . . Connection

14. . . First outer casing

15. . . Seat

16. . . Inflow port

17. . . First tube

18A. . . Female thread

18B. . . Fitted part

19. . . Opening

20. . . Second outer casing

twenty one. . . Middle wall

twenty two. . . Outflow

twenty three. . . Second tube

24A. . . Male thread

24B. . . Mating part

25. . . Opening

26. . . Valve body

27. . . gap

28. . . Inner peripheral part

29. . . Open and close valve

30. . . Hypothetical line

32. . . Non-slip parts

33A, 33B. . . Second check valve (check valve)

34. . . Connection

35. . . First outer casing

36. . . Second outer casing

37. . . Seat

38. . . Inflow port

39. . . First tube

40A. . . Female thread

40B. . . Mating part

41. . . Opening

42. . . Middle wall

43. . . Outflow

44. . . Second tube

45A. . . Male thread

45B. . . Fitted part

46. . . Opening

48. . . Tube

49. . . Female thread

50. . . Opening

51. . . Buckle claw

52. . . Protrusion

53. . . Front end

54. . . Cylinder

55. . . Plunger

56. . . Cylinder body

57. . . Outflow entrance

58. . . Open end

59. . . First flange

60. . . Second flange

61. . . Plunger head

62. . . Plunger rod

63. . . Ring member (insertion hole portion)

64. . . Base end

64a. . . ditch

65. . . Discharge department

66. . . Male thread

67. . . Opening

68. . . Sealing part

71. . . Plunger

72. . . Plunger head

73. . . washer

75. . . Cylinder body

76. . . Ends

82. . . Connection

83. . . Tube

84. . . Male thread

85. . . Opening

86. . . Discharge department

87. . . Female thread

88. . . Roof cover

91. . . Discharge department

92. . . Connection

94. . . Male thread

95. . . Discharge body

96. . . Roof cover

97. . . Front end

98. . . Front end protection

210, 220, 230. . . Anti-shedding mechanism

211. . . Buckle claw

212. . . Buckle protrusion

221. . . Buckle claw

222. . . Buckle protrusion

231. . . Buckle claw

232. . . Buckle protrusion

240. . . Buckle belt parts

241. . . Body part

242. . . Hook

243. . . Embedding department

244. . . Stop

L1. . . The distance between the first flange portion and the second flange portion

L2. . . Inner diameter of the ring member

W. . . gap

Θ1. . . Tilting angle of the claw

Θ2. . . The inclination angle of the buckle protrusion on the side of the specific rotation direction

Θ3. . . The inclination angle of the convex portion on the opposite side of the specific rotation direction

Fig. 1 is a conceptual diagram showing the overall configuration of a fluid substance conveying device in the first embodiment.

Fig. 2 is an exploded cross-sectional view showing the three-way stopcock unit in the first embodiment.

Fig. 3 is a front elevational view showing the connecting member of the three-way stopcock unit in the first embodiment;

Fig. 4 is a valve body diagram of the three-way stopcock unit in the first embodiment, (a) is a front view, and (b) is a side view.

Fig. 5 is a cross-sectional view showing a state before the bag body and the transport catheter are connected to the three-way stopcock unit in the first embodiment.

Fig. 6 is a cross-sectional view showing a state in which a bag body and a conveying duct are connected to the three-way stopcock unit in the first embodiment.

Figure 7 is a cross-sectional view showing a fluid substance conveying device in a second embodiment of the present invention.

Fig. 8 is a cross-sectional view showing a state before the bag body and the transport catheter are connected to the three-way stopcock in the fluid substance transport device according to the third embodiment of the present invention.

Fig. 9 is a cross-sectional view showing a state in which a bag body and a conveying duct are connected to a three-way stopcock unit in the fluid substance conveying device according to the third embodiment of the present invention.

Fig. 10 is a cross-sectional view showing a state before the bag body and the transport catheter are connected to the three-way stopcock in the fluid substance transport device according to the fourth embodiment.

Fig. 11 is a cross-sectional view showing a state in which a bag body and a conveying duct are connected to a three-way stopcock unit in the fluid substance conveying device of the fourth embodiment.

Fig. 12 is a conceptual diagram showing the overall configuration of a fluid substance conveying device in the fifth embodiment.

Figure 13 is an exploded cross-sectional view showing the three-way stopcock unit in the fifth embodiment.

Fig. 14 is a view showing the configuration of the anti-drop mechanism in the fifth embodiment, wherein (a) is a cross-sectional view of the engaging claw portion, and (b) is a cross-sectional view of the engaging convex portion.

Fig. 15 is a view showing the operation of the anti-drop mechanism in the fifth embodiment, wherein (a) is a conceptual diagram when fastened, and (b) is a conceptual diagram when it is detached.

Fig. 16 is a perspective view conceptually showing the structure of the clasp portion in the fifth embodiment.

1A. . . Three-way stopcock unit

2A. . . Bag body

3. . . Conveying catheter

4. . . Branch flow path

5A. . . First valve

6A. . . Second valve

7A. . . syringe

8. . . First flow

9. . . Second flow path

10. . . Third flow path

54. . . Cylinder

55. . . Plunger

59. . . First flange

60. . . Second flange

63. . . Ring part

100A. . . Fluid material delivery device

Claims (14)

A three-way stopcock unit, comprising: a branch flow path that engages a first flow path, a second flow path, and a third flow path for flowing a flow at a junction point, a syringe, the syringe The suction force is supplied to the branch flow path and is provided on the third flow path. The suction force causes the fluid material to flow into the first flow path from the outside, and the extrusion force is caused by the second flow path. The fluidity substance flows out of the outside, the first valve portion, the first valve portion is configured to prevent the fluid from flowing out from the first flow path, and is disposed at the open end of the first flow path, and the second valve portion, the second valve portion Providing a flow of the fluid from the second flow path to be provided at an opening end of the second flow path; and at least one of the first valve portion or the second valve portion includes a first outer casing, the first outer casing having a first cylindrical portion, a valve seat for blocking one open end of the first cylindrical portion, and an opening disposed on the valve seat, the second outer casing, the second outer casing having a second cylindrical portion, the second cylinder In the first The first tubular portion of the casing is inserted from the other open end side, and the valve body is formed by an elastic piece, and is opened by the valve seat of the first outer casing and the cylindrical portion of the second outer casing The valve body is provided with a slightly U-shaped slit formed on the outer side of the outer peripheral portion of the opening provided on the valve seat of the first outer casing and opposite to the second outer casing The inner peripheral portion of the tubular portion is opposite to the inner side; the inner portion of the split is used as an opening and closing valve, and the outer portion of the split is sealed between the valve seat of the first outer casing and the tubular portion of the second outer casing It is in a liquid-tight state. The three-way stopcock unit according to claim 1, wherein the cylindrical portion of the syringe is formed integrally with the third flow path. The three-way stopcock unit according to claim 1, wherein the first outer casing provided on the first valve portion is integrally formed with the first flow path. The three-way stopcock unit according to claim 1, wherein the second outer casing provided on the second valve portion is integrally formed with the second flow path. The three-way stopcock unit according to any one of claims 1 to 4, wherein at least one of the first valve portion or the second valve portion includes a tubular connecting member, and the tubular connecting member is used And a fastening claw portion that is screwed or fitted to the other article, and a fastening claw portion that is fastened to the other article in a state of being connected to the other article to prevent the other article from falling off And disposed on the connecting component. The three-way stopcock unit according to claim 5, wherein the connecting member is formed as a female member into which the other article can be inserted, and the inner side of the connecting member is inserted with respect to the other member. The above-described fastening claw portion is protruded in such a manner as to form an acute angle. The three-way stopcock unit according to any one of claims 1 to 4, wherein at least one of the first valve portion or the second valve portion is formed by an inner side surface of the first tubular portion and the first a male thread is formed on one of the outer side surfaces of the second cylindrical portion and a female thread is formed on the other surface, and the first cylindrical portion is rotated in a specific direction and screwed into the second cylindrical portion, and has an anti-drop structure. The fall-preventing structure allows only the first tubular portion to rotate only in the specific direction, whereby the second tubular portion can be prevented from falling off from the first tubular portion. The three-way stopcock unit according to claim 7, wherein the anti-drop structure has one or a plurality of buckles formed on one of an inner side surface of the first cylindrical portion and an outer side surface of the second tubular portion a claw portion and one or a plurality of fastening projections formed on the other surface; the fastening claw portion is formed to be inclined toward the opposite side of the specific direction, and the fastening convex portion is formed in the first tubular portion When rotating in the specific direction, the buckle claw portion is deformed in a direction substantially at right angles to the rotation direction, thereby allowing the first tubular portion to rotate, and the first tubular portion is intended to be When the specific direction is rotated in the reverse direction, the first tubular portion is prevented from rotating by being engaged with the locking claw portion. The three-way stopcock unit according to claim 1, wherein the plunger portion of the syringe is provided with a plunger head which is a slightly circular plate which slides inside the cylindrical portion in a liquid-tight state. a resin product, and a plunger rod, which is a resin product integrally formed with the plunger head. The three-way stopcock unit according to claim 1, wherein the plunger portion of the syringe has a plunger head that slides inside the cylindrical portion, and a plunger rod that is connected to the plunger rod To the plunger head, a buckle portion, the buckle finger portion is disposed at a base end portion of the plunger rod for engaging a user's finger, performing the movement operation of the plunger rod in the axial direction, and two convex portions In the rim portion, the flange portion is disposed in parallel along the axial direction on the cylindrical portion of the syringe, and has a space therebetween that can extend into the finger of the user. The three-way stopcock unit according to claim 10, wherein the buckle finger portion protrudes from the annular member on the plunger rod. The three-way stopcock unit according to claim 10, wherein the buckle portion has a belt-shaped body portion formed of a bendable material, and a hook portion for embedding the base of the plunger rod Fixed in the groove formed on the end portion, respectively disposed at two ends of the body portion; the hook portion is alternately provided with one or a plurality of narrow embedded portions and one or a plurality of wide stopper portions, When the insertion portion is fitted, the stopper portion abuts against the base end portion from the lower side of the groove. A check valve is characterized in that: a first outer casing is provided, the first outer casing has a first cylindrical portion, a valve seat for blocking one open end of the first tubular portion, and an opening provided on the valve seat a second outer casing having a second cylindrical portion that is inserted from the other open end side of the first cylindrical portion of the first outer casing, and a valve body that is elastic a sheet formed by the valve seat of the first outer casing and the open end of the tubular portion of the second outer casing; the valve body having a slightly U-shaped slit formed in the first outer casing The outer peripheral portion of the opening provided on the valve seat is biased outwardly and is located inward of the inner peripheral edge portion of the tubular portion of the second outer casing; the inner portion of the split is used as an opening and closing valve, and the slit is In the outer portion, the valve seat of the first outer casing and the tubular portion of the second outer casing are sealed in a liquid-tight state. A fluid substance conveying device comprising: a three-way stopcock unit according to claim 1 of the patent application scope, and a container for storing fluidity flowing into the three-way stopcock unit from the first flow path; a substance connected to the second valve portion and a conduit for supplying the fluid substance to the inside of the human body and connected to the first valve portion.