JP4000125B2 - Syringe connection port - Google Patents

Description

  The present invention relates to a syringe connection port that is provided in an opening of a container or a pipe and connects a twist lock type needleless syringe to the container or the pipe.

FIG. 21 is an explanatory diagram of an infusion line for transfusion of blood or chemicals using a transfusion mixed injection tube. Blood or a chemical solution is supplied from the infusion bag or infusion bag 100 to the catheter 103 connected to the connector 102 via the infusion tube 101. An infusion needle 104 is connected to one end of the infusion tube 101, and a drip chamber (infusion tube) 105 for monitoring the flow rate of blood or drug solution is connected to the infusion needle 104, and hereinafter, the infusion tube 101 up to the connector 102 is connected to the infusion tube 101. In sequence, a flow rate controller 106, a desired number of mixed injection tubes 107, an octopus tube 108 for removing dust and bubbles, a filter 109 for blocking the passage of dust and the like are connected (for example, see Patent Document 1). )
.

  For example, as shown in FIG. 22, a conventional mixed injection pipe 107 has a disk-like rubber stopper 107c fitted in a branch pipe portion 107b formed on a side portion of a T-shaped pipe main body 107a. The tube body 107a is inserted and connected in the middle of the infusion tube 101 of an infusion circuit (for example, a dialysis circuit of an artificial kidney, an infusion circuit, etc.) as shown in FIG. The injection needle 110a attached to the tip of the syringe 110 is inserted into the rubber stopper 107c of the tube portion 107b, and the blood and the drug solution in the main body of the syringe 110 are mixedly mixed with the blood and the drug solution in the infusion circuit (for example, Patent Documents). 2).

JP-A-8-206230 (FIG. 10) JP 2002-306610 A (FIG. 28)

  The conventional mixed injection tube 107 is used by inserting an injection needle 110a into a disk-shaped rubber stopper 107c, and the cost is increased by the use of the injection needle 110a. Also, a doctor or a nurse mistakenly inserts the injection needle 110a. There was a risk of being pierced by a finger or the like and contaminated with pathogenic bacteria due to blood adhesion of the patient. In addition, the used injection needle 110a must be discarded without being reused to prevent contamination of pathogenic bacteria due to blood adhesion of the patient, and a waste product collector or the like is inadvertently damaged by the injection needle 110a or caused by pathogenic bacteria. There is a problem that requires sufficient consideration for disposal so as not to be contaminated, and there is also a problem that nosocomial infection occurs due to misfiring of the used injection needle 110a.

  In view of this, the present inventors have considered a syringe connection port in which a drug solution such as blood or nutrients can be mixed with blood or drug solution in an infusion circuit by a so-called needleless syringe that does not use an injection needle in the middle of the infusion circuit. ing. This syringe connection port holds a disc-shaped seal valve having a cut portion by a cap that does not have a sleeve portion, and the seal valve and the cap are substantially flush with each other. However, although the mouth portion of the needleless syringe can be easily passed through the cut portion of the seal valve, it is difficult to reliably hold the mouth portion of the syringe with the seal valve.

  For this reason, the present inventor has further proposed a device in which a twist lock type needleless syringe can be used to lock the syringe to the sleeve portion of the cap. The twist lock type needleless syringe has a collar portion around the mouth portion, and a threaded piece formed at the upper end of the outer peripheral surface of the sleeve portion into which the mouth portion of the syringe is inserted with a female screw portion formed on the inner surface of the collar portion However, in the structure in which a disc-shaped seal valve is arranged at the base of the branch pipe portion, the mouth of the syringe cannot be directly passed through the cut portion of the seal valve. was there.

  Therefore, the inventor further places an adapter on a disc-shaped seal valve provided with a cut portion penetrating in the vertical direction, and the cut portion of this seal valve is normally crimped by the branch pipe portion of the mixed injection pipe. While sealing, insert the mouth part of the twist lock type needleless syringe into the sleeve part, press the adapter with the tip of the mouth part, and insert the adapter into the cut part of the seal valve to penetrate it. There has also been proposed a needleless co-infusion tube that co-injects blood and chemical solutions.

  However, the twist lock type needleless mixed injection tube in which the adapter is inserted into the cut part and penetrated to mix blood or chemical from the syringe into the blood or chemical in the infusion circuit requires an adapter in addition to the seal valve. In addition, since the large-diameter mouth portion is penetrated instead of the injection needle, the cut portion of the seal valve becomes large, and in order to ensure pressure-tightness, the shape of the seal valve and the shape of the cut portion are devised. There was room for improvement.

  The present invention has been proposed in view of the above-described problems of the prior art, and its main purpose is to use an adapter by inserting the mouth of a twist-lock needleless syringe that does not use an injection needle into the sleeve portion. To provide a syringe connection port capable of injecting blood or drug solution in a syringe into blood or drug solution in an infusion circuit by directly pressing and deforming the seal valve at its mouth to open the valve hole. is there.

  A subordinate object of the present invention is to prevent contamination of blood and chemicals remaining on the surface of the seal valve with bacteria in the air when the mouth of the twist lock needleless syringe is removed from the sleeve. Is to wipe off blood and chemicals remaining on the surface of the seal valve.

In order to achieve the above object, a syringe connection port according to claim 1 of the present invention includes a substantially hemispherical seal valve made of an elastic material having a valve hole in a central portion, which is attached to an opening of a container or piping. A sleeve portion that is provided so as to surround an opening of a container or a pipe, presses a seal valve, and crimps and seals the valve hole, into which a mouth portion of a twist lock type needleless syringe can be inserted, and the twist lock type needleless syringe. In a state where the mouth portion is inserted into the sleeve, the seal valve is directly pressed and deformed at the tip end of the mouth portion without penetrating the seal valve to open the valve hole of the seal valve. It is characterized by doing so.

According to the above configuration, the valve hole of the seal valve is normally crimped and sealed by the sleeve portion, and the valve hole of the seal valve does not open due to the internal pressure of the infusion circuit, so that blood and chemicals do not leak. In addition, by inserting the mouth of the twist lock type needleless syringe into the sleeve, the mouth of the syringe can be directly deformed without passing through the adapter and the seal valve can be pressed and deformed, The valve hole can be opened. Moreover, the state in which the valve hole of the seal valve is opened can be maintained by screwing (twist-locking) the threaded piece of the sleeve part and the female threaded part of the inner peripheral surface of the collar part of the syringe. Therefore, the blood and the drug solution in the syringe can be mixed and injected into the blood and the drug solution in the infusion circuit through the syringe connection port through the opened valve hole. In addition, the blood and the chemical | medical solution in an infusion circuit can be extracted to a syringe via a syringe connection port as needed. Furthermore, by releasing the screwed state between the female threaded portion on the inner surface of the collar portion of the syringe and the screwed piece of the sleeve portion, the seal valve returns to its original shape with its own elastic restoring force, so that the seal valve again. Since the valve hole is sealed by pressure, blood and chemicals do not leak. In addition, the substantially hemispherical seal valve has a higher head position in the sleeve portion than the disc-shaped seal valve attached to the base portion of the sleeve, so the mouth of the twist-lock type needleless syringe into the sleeve portion. By inserting the part, the seal valve can be pressed and deformed directly, that is, without using an adapter, and the valve hole can be opened reliably, and the elastic resilience when the pressing force by the mouth of the syringe is released The valve hole of the seal valve can be reliably crimped and sealed to prevent leakage of blood or chemicals. Moreover, since the force in the direction of closing the valve hole acts on the inner side of the seal valve against the deformation due to the internal pressure of the blood or the chemical liquid, it is possible to reliably prevent the leakage of the blood or the chemical liquid due to the internal pressure.

  The syringe connection port according to claim 2 of the present invention is characterized in that the seal valve has one or both of a ring portion and a recess around the valve hole.

  According to the above configuration, the valve hole of the seal valve is normally crimped and sealed by its own elastic force, and it is possible to eliminate leakage of blood and chemicals. Further, the valve portion of the seal valve can be opened by bringing the mouth portion of the twist lock type needleless syringe into contact with the seal valve to press and deform the seal valve, and the infusion circuit can be opened through the opened valve hole. The blood and drug solution in the syringe can be mixed with the blood and drug solution. At this time, since the seal valve is provided with either or both of the ring portion and the recess around the valve hole, the valve hole of the seal valve is easily opened. When inserted, the valve hole can be reliably opened. Further, by releasing the screwing of the screwed piece of the sleeve part and the female screw part in the collar part of the syringe, the valve hole of the seal valve is again crimped and sealed, so that leakage of blood and chemicals can be prevented.

According to the syringe joint port of the first aspect of the present invention, a seal valve made of an elastic material having a valve hole at the center of the upper portion and the opening of the container or pipe are provided so as to surround the seal valve, A sleeve portion that can be inserted and sealed with a twist lock type needleless syringe that seals the valve hole, and a seal valve that seals the tip of the mouth portion when the mouth portion of the twist lock type needleless syringe is inserted into the sleeve. The seal valve is pressed and deformed directly at the end of its mouth without being inserted into the valve, so that the valve hole of the seal valve is opened. In addition, the valve hole of the seal valve does not open due to the internal pressure of the infusion circuit, and blood and chemicals do not leak. In addition, by screwing the syringe into the sleeve (twist lock), the seal valve is pressed and deformed directly without going through the adapter, and without inserting and penetrating the mouth of the syringe into the valve hole of the seal valve. The valve hole can be opened. Moreover, the state in which the valve hole of the seal valve is opened can be maintained by screwing the sleeve portion and the syringe. Therefore, the blood and the drug solution in the syringe can be mixed and injected into the blood and the drug solution in the infusion circuit through the syringe connection port through the opened valve hole. In addition, the blood and the chemical | medical solution in an infusion circuit can be extracted to a syringe via a syringe connection port as needed. Furthermore, by releasing the screwed state between the syringe and the sleeve portion, the seal valve returns to its original shape by its own elastic restoring force, and the valve hole of the seal valve is again crimped and sealed. There is no leakage of chemicals. Further, since the mouth portion of the syringe is not inserted through the valve hole and penetrated, the blood and the infusion are not attached to the outer peripheral surface of the mouth portion of the syringe extracted from the sleeve portion, which is sanitary. Further, since the seal valve is substantially hemispherical, compared to a disc-shaped seal valve, by inserting the mouth of the twist lock type needleless syringe into the sleeve portion directly, that is, without using an adapter, Furthermore, when the mouth of the syringe is inserted into the valve hole of the seal valve and the seal valve is pressed and deformed without being penetrated, the valve hole can be opened reliably, and the pressing force by the mouth of the syringe is released. It is possible to prevent leakage of blood and chemicals by securely pressing and sealing the valve hole of the seal valve.

In the syringe connection port according to claim 2 of the present invention, since the seal valve is provided with one or both of a ring portion and a recess around the valve hole, the valve hole of the seal valve is normally crimped. It is sealed and can prevent blood and chemicals from leaking. Further, the opening of the seal valve can be more easily and reliably opened by bringing the mouth of the twist lock type needleless syringe into contact with the seal valve and pressing and deforming the seal valve. Through the valve hole, the blood or drug solution in the syringe can be mixed and mixed with the blood or drug solution in the infusion circuit.

  Hereinafter, embodiments in which the syringe connection port of the present invention is applied to various mixed injection tubes will be described with reference to the drawings.

  As shown in FIGS. 1A and 1B, the mixed injection tube 1 of the first embodiment includes infusion tube connection ports 11 and 12 at both ends, and communicates between these infusion tube connection ports 11 and 12. A pipe main body 10 having a T-shaped tube shape having a lumen, and a branch pipe portion 13 having a lumen formed on a side portion of the pipe main body 10 and communicating with the lumen; An outwardly convex hemispherical seal valve 20 made of an elastic material formed by penetrating the valve hole 20b in the up-down direction through the recess 20a is hermetically fitted and pressed and fixed with a cap 30.

  The branch pipe portion 13 is formed so that a part of the pipe body 10 is a thin-walled portion 10a within a range that does not impair the strength of the pipe body 10, and the height dimension thereof is reduced. Further, the lower end of the seal valve 20 is supported by the flange portion 10b.

The tube main body 10, the branch tube portion 13 and the sleeve portion 30c are made of a polymer resin material such as polyamide, polyvinyl chloride, polypropylene, polyurethane, polycarbonate, polyethylene or the like.

  The seal valve 20 is made of an elastic material, for example, a polymer material such as silicon rubber, natural rubber, polyurethane, soft polyvinyl chloride, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, polyisoprene. ing. And it is hemispherical convex outward (upward in the figure), and has a head 44 or a rubber valve cover of a twist lock type needleless syringe (hereinafter referred to as a syringe) 40 described later on its head. 50 has a receiving portion 20a made of a recess for receiving 50, and a valve hole 20b made of a slit is formed through the central portion of the receiving portion 20a. In addition to the slit, the valve hole 20b has an arbitrary shape such as a round shape or a cross shape in a plan view, and a cross-sectional shape of a V shape, an inverted V shape, a conical shape, an inverted conical shape, a convex shape, or an inverted convex shape. It is possible to form by penetrating in the up-down direction in any shape such as. The valve hole 20b can be formed, for example, by piercing a linear or conical valve hole forming tool after the sealing valve 20 is formed, but can also be formed at the same time as the sealing valve 20 is formed.

  An engaging convex portion 13 a is provided on the outer peripheral surface of the upper end of the branch pipe portion 13. The cap 30 has a substantially T-shaped cross section, and has an engagement convex portion 30a provided on the inner peripheral surface of the lower end serving as an engagement portion with the branch pipe portion 13, and a hemispherical seal. A concave arcuate portion 30b is provided on the inner surface with which the valve 20 abuts, and a threaded piece 30d into which the female thread portion 46 of the collar portion 45 of the syringe 40 is screwed onto the upper end of the outer peripheral surface of the cylindrical sleeve portion 30c. Is protruding. Further, when the mouth portion 44 of the syringe 40 is inserted into the sleeve portion 30c, the insertion amount of the mouth portion 44 is set according to the DIN standard so that the height dimension of the sleeve portion 30c is The standard value is exceeded.

The outer diameter D ₁ (not shown) at an arbitrary position on the convex arc-shaped peripheral surface portion of the seal valve 20 is changed to the inner diameter D ₂ (not shown) at the corresponding position on the concave arc-shaped portion 30b of the cap 30.
A larger diameter (D ₁ > D ₂ ) and a predetermined tightening allowance (D ₁ -D ₂ ) are provided.
Is placed in the sleeve portion 30c, and the cap 30 is mounted on the branch pipe portion 13, so that the compression force of the cap 30 is applied to the seal valve 20, and the valve hole 20b is normally in a pressure-tight sealed state. Like that.

  Here, the hemispherical seal valve 20 is deformed so as to bulge outward when the internal pressure of blood or a chemical solution is applied to the seal valve 20 as compared with the disk-shaped seal valve. Since a force that closes the lower end of the valve hole 20b acts, the infusion solution does not leak from the valve hole 20b due to the internal pressure of blood or chemicals. Furthermore, since the hemispherical seal valve 20 has a higher head height than the disc-shaped seal valve, when the mouth portion 44 of the syringe 40 is inserted into a sleeve portion described later, the adapter is interposed. The seal valve 20 can be directly pressed and deformed without any problem, and the valve hole 20b can be reliably opened.

An infusion tube of an infusion circuit is inserted and connected to the infusion tube connection ports 11 and 12 of the tube body 10 of the mixed injection tube 1 having a configuration in which the seal valve 20 is liquid-tightly arranged in the branch pipe portion 13 as described above. The mixed injection tube 1 is inserted and connected in the middle of the infusion circuit. Infusion tube connection ports 11 and 12
The infusion tube may be inserted and connected with an adhesive, or may be simply press-fitted using the elastic force of the infusion tube.

  FIG. 2 shows a syringe 40 screwed onto the mixed injection tube 1 described above. The syringe 40 includes a syringe body 41 and a pusher 42. The syringe main body 41 includes a cylinder portion 43 into which the pusher 42 is inserted, a mouth portion 44 protruding in a cylindrical shape or a male taper shape from the tip of the cylinder portion 43, and a collar erected in a cylindrical shape around the mouth portion 44. A portion 45, a female screw portion 46 formed on the inner peripheral surface of the collar portion 45, and a flange portion 47 formed at the rear end of the cylinder portion 43. The pusher 42 has a + -shaped cross section, and has a bulging portion 48 that can slide in an airtight and liquid-tight manner on the inner surface of the cylinder portion 43 at the tip, and a flange portion 49 that makes it easy to apply a pressing force to the rear end. Have. The mouth portion 44 protrudes by a predetermined dimension from the collar portion 45 as shown in the figure.

  Then, the mouth portion 44 of the syringe 40 is inserted into the sleeve portion 30c of the cap 30, and the female screw portion 46 formed on the inner surface of the collar portion 45 of the syringe 40 is formed on the upper end of the outer peripheral surface of the sleeve portion 30c. When screwed into the piece 30d, the seal valve 20 is pressed directly at the tip of the mouth portion 44 of the syringe 40, and the seal valve 20 is deformed. As shown in FIG. 46 and the screwing piece 30d are brought into a completely screwed state (twist lock), whereby the valve hole 20b of the seal valve 20 is opened, and the syringe 40 is held by the sleeve portion 30c so that the valve hole 20b is opened. Can be maintained. Next, by pushing the pusher 42 of the syringe 40 into the cylinder portion 43, the blood and the chemical solution in the cylinder portion 43 can be mixed and injected into the blood and the chemical solution in the infusion circuit via the mixed injection tube 1. In addition, the blood and the chemical | medical solution of an infusion circuit can also be extracted in the cylinder part 43 of the syringe 40 through the mixed injection tube 1 as needed.

  Instead of the seal valve 20 having the receiving portion 20a in the first embodiment, as in the hemispherical seal valve 21 shown in FIG. A ring portion 21d having a predetermined height and a recess 21e having a predetermined depth may be provided. Alternatively, like the substantially hemispherical seal valve 22 shown in FIG. 3B, the hemispherical outer peripheral portion in the vicinity of the head is formed into a shape close to a conical shape from the spherical surface, and the mouth portion 44 of the syringe 40 is formed in the head. You may provide the flat part 22d of predetermined height and the recessed part 22e of predetermined depth for contact | abutting.

  When a ring portion 21d having a predetermined height is provided on the head like the seal valve 21 shown in FIG. 3 (A), the seal portion 21 is sealed by the mouth portion 44 of the syringe 40 by an amount corresponding to the height dimension of the ring portion 21d. When the valve 21 is pushed down further and the recess 21e is provided, the thickness of the valve hole 21b is reduced. When the ring portion 21d is pressed by the mouth portion 44 of the syringe 40 and the seal valve 21 is deformed by the cooperative action, the valve hole 21b in the direction of the arrow a is tightened on the ring portion 21d of the seal valve 21. A force is applied, and a force for opening the valve hole 21b in the direction of the arrow b is applied to the lower surface of the seal valve 21. When the mouth 44 of the syringe 40 is further pushed in, the force in the direction of the arrow a shown above is received by the upper end of the valve hole 21b, and only the force in the direction of the arrow b acts to Since the thickness dimension of the 21 valve hole 21b part is made small by the recessed part 21e, the valve hole 21b is opened more and more. When the syringe 40 is twist-locked to the sleeve portion 30c, the seal valve 21 is greatly deformed and the upper end portion of the valve hole 21b is also opened. The internal pressure resistance against the internal pressure in the direction indicated by the arrow c due to the blood or chemical in the mixed injection tube 1 can be increased by controlling the deformation of the ring portion 21d by the pressing force in the direction indicated by the arrow d by the mouth 44 of the syringe 40. That is, in this seal valve 21, the valve hole 21b can be opened more reliably than the seal valve 20 of FIG. 1 by the cooperative action of the ring portion 21d and the recess 21e. Although the most excellent opening operation can be obtained when both the ring portion 21d and the concave portion 21e are provided, only one of them may be provided.

  Further, as in the case of the seal valve 22 shown in FIG. 3B, when the outer peripheral surface near the head is formed in a shape close to a conical shape and the flat portion 22d is provided, and the concave portion 22e is provided, the flat portion 22d The height position is increased in the same manner as when the ring portion 21d is provided, and the thickness of the valve hole 22b is reduced by providing the recess 22e, whereby the seal valve 21 shown in FIG. Similarly, the valve hole 22b is more reliably opened by the cooperative action of the flat portion 22b and the concave portion 22e. The internal pressure resistance against the internal pressure in the direction indicated by the arrow c due to the blood or chemical in the mixed injection tube 1 can be increased by controlling the deformation of the flat portion 22e by the pressing force in the direction indicated by the arrow d by the mouth portion 44 of the syringe 40. However, as compared with the case where the ring portion 21d of FIG. 3A is provided, the seal valve 22 is less deformed because the thickness of the head portion of the seal valve 22 is larger. The ease of opening the valve hole 22b is slightly reduced.

  In the mixed injection pipe 1 according to the first embodiment and the modification shown in FIGS. 1 and 3, the elastic force of the seal valves 20, 21 and 22 and the tightening pressure received from the cap 30 are always used as described above. The valve hole 20b (21b, 22b is also the same, and hereinafter referred to as the valve hole 20b) can be crimped and hermetically sealed to prevent blood or chemicals from leaking out. Further, the collar portion 45 of the syringe 40 is screwed into a screwed piece 30d of the sleeve portion (twist lock), so that the mouth portion 44 of the syringe 40 penetrates the valve holes 20b of the seal valves 20, 21, and 22. The seal valves 20, 21, and 22 are pressed and deformed, the valve hole 20 b is opened, and blood or chemical liquid in the syringe 40 is mixed with blood or chemical liquid in the infusion circuit, or blood in the infusion circuit as necessary. Or the drug solution can be extracted into the syringe 40. Further, when the screwed state of the syringe 40 and the sleeve portion 30c is released, the seal valve 20 is shown in FIGS. 1A, 3A, and 3B by the elastic restoring force of the seal valves 20, 21, and 22. The original hemispherical shape or substantially hemispherical shape can be restored, and the valve hole 20b can be crimped and sealed again with the tightening force received from the cap 30 to prevent blood and chemicals from leaking.

  In the mixed injection tube 1 of the first embodiment and the modified example, when the mouth portion 44 of the syringe 40 is extracted from the sleeve portion 30c of the cap 30, the inside of the syringe 40 or on the upper surface of the seal valves 20, 21, 22 There is a possibility that some blood and chemicals in the mixed injection tube 1 remain. If a small amount of blood or drug solution in the syringe 40 or the mixed injection tube 1 remains on the upper surface of the seal valve 20 and is left to stand, the residual blood or drug solution is contaminated by bacteria floating in the air. Or dried and solidified. Then, when blood or a drug solution is mixed with the syringe 40 or when blood or a drug solution is extracted with the syringe 40, the mouth 44 of the syringe 40 is contaminated with bacteria or dried and solidified. There is a risk that blood and chemicals may mix with blood and chemicals in the infusion circuit and be injected into the patient's blood vessels.

  Therefore, if blood or chemical liquid remains on the upper surface of the seal valve 20 after the syringe 40 is removed, do not let the remaining blood or chemical liquid come into contact with air or use gauze or cotton containing alcohol. It is necessary to wipe off. However, in the mixed injection pipe 1 of the first embodiment and the modified example, since the heads of the seal valves 20, 21, 22 are in the inner part of the sleeve portion 30c, the top surfaces of the seal valves 20, 21, 22 It is difficult to wipe off blood and chemicals remaining on the skin, and improvement of this point is desired. Satisfying this need is a subordinate objective of the present invention, as described above.

  The mixed injection tube 1a of the second embodiment is improved so as to satisfy the above-mentioned demand. As shown in FIG. 4A, a hemispherical material made of an elastic material similar to that shown in FIG. A rubber valve cover 50 made of an elastic material such as silicon rubber similar to that described above is disposed on the receiving part 20a of the seal valve 20 in which the receiving part 20a is formed in the head part and the valve hole 20b is formed in the receiving part 20a. It is a thing. The rubber valve cover 50 includes a standing leg portion 50a having a drum-like longitudinal cross-section and a hemispherical shape convex outward (upward in the figure), for example, a head portion 50b having a thickness dimension of about 0.3 mm. A through hole 50c is formed at the center of the head 50b. However, it is not necessary to make the through hole 50c of the rubber valve cover 50 the same shape as the valve hole 20b of the seal valve 20, but it is simply closed at all times, and is pressed and deformed at the mouth 44 of the syringe 40. Any shape can be used as long as it is opened. Here, “closed” means that the internal pressure resistance that prevents leakage of blood or chemical liquid by the internal pressure of blood or chemical liquid is not required, unlike the valve hole 20 b of the seal valve 20.

  Since the lower end of the standing leg portion 50a of the rubber valve cover 50 is fitted to the receiving portion 20b of the seal valve 20, the positioning of the rubber valve cover 50 is facilitated. The receiving portion 20b of the seal valve 20 and the lower end of the standing leg portion 50a of the rubber valve cover 50 may be adhered by an adhesive or the like, but may simply be brought into contact with each other. Note that the size of the receiving portion 20 a of the seal valve 20 may be reduced according to the outer dimension of the lower end of the standing leg portion 50 a in the rubber valve cover 51.

  The outer diameter d1 (not shown) of the hemispherical head 50b of the rubber valve cover 50 is smaller than the inner diameter d2 (not shown) of the sleeve 30c of the cap 30 (d1 <d2), so that the rubber valve cover No tightening force may be applied to 50, or d1≈d2 or d1> d2.

  Further, the head portion 50b of the rubber valve cover 50 is set to be almost the same height as the upper end of the sleeve portion 30c. At this time, the head portion 50b of the rubber valve cover 50 is slightly recessed from the upper end of the sleeve portion 30c when the syringe 40 is inserted into the mixed injection tube 1a or when the syringe 40 is removed from the mixed injection tube 1a. For example, the operator's hand and other equipment are not inadvertently contacted with the head 50b of the rubber valve cover 50 and contaminated, and the remaining blood and chemicals are not spilled off.

  When the female threaded portion 46 of the collar portion 45 of the syringe 40 shown in FIG. 2 is screwed into the screwed piece 30d of the sleeve portion 30c of the cap 30 in the mixed injection tube 1a of the second embodiment, the syringe is placed. As shown in FIG. 4B, the rubber valve cover 50 is pressed and deformed by the opening 44 of the 40, the through hole 50c is opened, and the seal valve 20 is also pressed and deformed, so that the valve hole 20b is formed. Open. Through this through-hole 50c and the valve hole 20b in the open state, blood and chemical liquid in the syringe 40 can be mixed and injected into blood and chemical liquid in the mixed injection tube 1a. Moreover, the blood and the chemical | medical solution in the mixed injection tube 1a can also be extracted to the syringe 40 as needed.

  When the threaded state of the female threaded portion 46 of the collar portion 45 of the syringe 40 and the threaded piece 30d of the sleeve portion 30c is released and the syringe 40 is removed, the rubber valve cover 50 and the seal valve 20 are elastically restored. 4A, the through hole 50c of the rubber valve cover 50 is contracted or closed, and the valve hole 20b of the seal valve 20 is pressure-tightly sealed, so that blood or a chemical solution is removed. Prevent leakage.

  Moreover, since the rubber valve cover 50 is disposed on the seal valve 20, even if blood or chemical liquid remains in the receiving portion 20a of the seal valve 20, the remaining blood or chemical liquid is covered with the rubber valve cover 50. It is possible to prevent the remaining blood and chemicals from being contaminated by bacteria in the air. Even if blood or chemicals in the syringe 40 or the mixed injection tube 1a may remain on the upper surface of the head portion 50b of the rubber valve cover 50, the upper surface of the head portion 50b of the rubber valve cover 50 remains on the sleeve portion. Since it is almost the same height as the upper end of 30c, it can be easily wiped with gauze or cotton containing alcohol. Therefore, it is possible to solve the above-mentioned problems caused by the remaining blood or chemical solution being contaminated by bacteria or being dried and solidified.

  FIG. 5 shows a mixed injection pipe 1b according to a third embodiment having a deformed rubber valve cover 51. FIG. Since the parts other than the rubber valve cover 51 are the same as those of the mixed injection pipe 1a of the second embodiment shown in FIG. 4, the same reference numerals are given to the same parts and the description thereof is omitted. The rubber valve cover 51 in the mixed injection pipe 1b of the third embodiment is such that the standing leg portion 51a has an inverted conical shape. Even in this case, the rubber valve cover 50 shown in FIGS. 4 (A) and 4 (B). A function similar to that of the mixed injection tube 1a having the above is obtained.

  FIG. 6 shows a mixed injection tube 1c according to the fourth embodiment. In the mixed injection pipe 1 c, the shapes of the rubber valve cover 52 arranged on the upper surface of the cap 31 and the seal valve 20 are different. That is, the cap 31 includes an engaging convex portion 31a on the inner peripheral surface that engages with the branch pipe portion 13, a concave arc-shaped portion 31b that presses the hemispherical outer peripheral surface of the seal valve 20, a sleeve portion 31c, and an outer peripheral surface. A threaded piece 31d is provided at the upper end, and a flange 31e is provided at the inner periphery of the upper end. The rubber valve cover 52 includes a substantially elliptical standing leg portion 52a, a hemispherical head portion 52b, a through hole 52c formed in the central portion of the head portion 52b, and a flat surface formed in the peripheral portion of the head portion 52b. Part 52d. The bottom surface of the flange portion 31e is opposed to the flat surface portion 52d of the rubber valve cover 52 so that the rubber valve cover 52 is not pulled out from the sleeve portion 31c.

  In the mixed injection tube 1c of the fourth embodiment, when the syringe 40 is pulled out, the flat portion 52d of the rubber valve cover 52 is blocked by the flange portion 31e of the sleeve portion, and the rubber valve cover 52 is pulled out from the sleeve portion 31c. Since it can be surely prevented, the elastic force of the rubber valve covers 51 and 52 itself and the tightening force of the sleeve portion 31c as in the mixed injection pipes 1a and 1b of the second and third embodiments shown in FIGS. As compared with the case where the removal prevention is performed, the clearance between the outer diameter of the rubber valve covers 51 and 52 and the inner diameter of the sleeve portion 31c can be easily set. If the flat portion 52d of the rubber valve cover 52 is pressed by the flange portion 31e of the cap 31, the rubber valve cover 52 is pressed against the seal valve 20, and the contact portion or joint portion between the seal valve 20 and the rubber valve cover 52 is pressed. Leakage of blood and chemicals from can be reliably prevented. Therefore, the seal valve 20 and the rubber valve cover 52 are not necessarily bonded, and may simply be brought into contact with each other. Alternatively, the flange portion 31e of the cap 31 and the flat surface portion 52d of the rubber valve cover 52 may face each other with a minute gap.

  FIG. 7 shows a mixed injection tube 1d of the fifth embodiment. The cap 32 of the mixed injection pipe 1d includes an engaging convex portion 32a on the inner peripheral surface of the engaging portion with the branch pipe portion 13, and a concave arc-shaped portion 32b that presses the hemispherical outer peripheral surface of the seal valve 25; The sleeve portion 32c has a threaded piece 32d at the upper end of the outer peripheral surface of the sleeve portion 32c, a flange portion 32e at the inner peripheral portion of the upper end, and a concave arcuate portion 32f between the flange portion 32e and the inner peripheral surface. The seal valve 25 is generally hemispherical as a whole, but its upper surface is formed on a flat surface 25a, and a valve hole 25b is formed at the center thereof. Further, the rubber valve cover 53 is formed at an inverted-conical standing leg portion 53a, a hemispherical head portion 53b, a through hole 53c formed at the center of the head portion 53b, and a lower end of the standing leg portion 53a. And a flange portion 53d. By engaging the cap 32 with the branch pipe portion 13, the rubber valve cover 53 is prevented from being pulled out by the concave arc-shaped portion 32 f of the cap 32.

  Also with the mixed injection tube 1d of the fifth embodiment, the concave arc-shaped portion 32f of the cap 32 can prevent the rubber valve cover 52 from being pulled out as in the mixed injection tube 1c shown in FIG. Is obtained. In addition, as compared with the mixed injection pipe 1c shown in FIG. 6, the rubber valve cover 53 can be simplified in shape and cost can be reduced because there is no flat portion (52d) around the head 53b of the rubber valve cover 53. . Further, since the flat surface 25a of the seal valve 25 and the flange portion 53d of the rubber valve cover 53 are in contact with each other, the mouth portion 44 of the syringe 40 is inserted into the sleeve portion 32c, and the rubber valve cover 53 and the seal. When the valve 25 is pressed and deformed, sufficient liquid tightness is obtained between the rubber valve cover 53 and the seal valve 25. Furthermore, since the hemispherical head portion 53b of the seal valve 25 and the concave arcuate portion 32f of the cap 30 are in surface contact, a large force is not applied to the local portion of the rubber valve cover 53.

  FIG. 8 shows a mixed injection tube 1e of the sixth embodiment. The mixed injection pipe 1e has a receiving portion 20a formed on the upper surface, and a rubber valve cover 54 is disposed on the receiving portion 20a of the hemispherical seal valve 20 having a valve hole 20b formed in the receiving portion 20a. The cap 31 includes an engaging convex portion 31a, a concave arc-shaped portion 31b that presses the hemispherical outer peripheral surface of the seal valve 20, a sleeve portion 31c, and a threaded piece 31d at the upper end of the outer peripheral surface of the sleeve portion 31c. And a flange 31e on the inner periphery of the upper end. Further, the rubber valve cover 54 includes an inverted conical standing leg portion 54a, a hemispherical head portion 54b, a through hole 54c formed in the head portion 54b, and a flange portion formed on the outer periphery of the lower end of the standing leg portion 52a. 54d. The flange portion 54 d of the rubber valve cover 54 is fitted into the receiving portion 20 a of the seal valve 20.

  Also in the mixed injection pipe 1e of the sixth embodiment, the rubber valve cover is provided by the flange 31e of the sleeve portion 31 in the same manner as the mixed injection pipes 1c and 1d of the fourth and fifth embodiments shown in FIGS. 54 can be prevented from escaping from the sleeve portion 31c.

  FIG. 9 shows a mixed injection tube 1f of the seventh embodiment. This mixed injection tube 1f is an improvement of the mixed injection tube 1c of the fourth embodiment shown in FIG. 6, and the cap 33 and the rubber valve cover 55 are different. That is, the cap 33 has an engaging convex portion 33a, a concave arc-shaped portion 33b, a sleeve portion 33c, a threaded piece 33d, and a flange portion 33e on the inner periphery of the upper end. The height of the standing leg portion 55a is reduced to form a substantially spherical shape as a whole. A through hole 55c is formed at the center of the head portion 55b, and a flat portion 55d is formed around the head portion 55b. Is formed.

  Then, the rubber valve cover 55 is prevented from being pulled out from the sleeve portion 33c by the flange portion 33e of the cap 33, similarly to the mixed injection tubes 1c to 1e of the fourth to sixth embodiments shown in FIGS. be able to.

  FIG. 10 shows a mixed injection tube 1g of the eighth embodiment. This mixed injection tube 1g is a modification of the mixed injection tube 1f of FIG. 9, and the shapes of the cap 34 and the rubber valve cover 56 are changed. That is, the cap 34 includes an engaging convex portion 34a, a concave arc-shaped portion 34b that presses the hemispherical outer peripheral surface of the seal valve 20, a sleeve portion 34c, a screwing piece 34d, and a flange portion on the inner periphery of the upper end. 34e. The rubber valve cover 56 has a flat spherical shape as a whole including the standing leg portion 56a, and a through hole 56c is formed at the center of the head portion 56b. A flat portion 55d like the rubber valve cover 55 of FIG. 9 is not formed around the head portion 56b of the rubber valve cover 56.

  According to the mixed injection tube 1g of the eighth embodiment, the rubber valve cover 56 is pulled out from the sleeve portion 34c by the flange portion 34e of the cap 34, similarly to the mixed injection tube 1f of the seventh embodiment shown in FIG. Can be prevented.

  FIG. 11 (A) shows a mixed injection tube 1h according to the ninth embodiment. In the mixed injection pipe 1h, the mixed injection pipes 1a to 1g of the second to eighth embodiments shown in FIGS. 4 to 10 separately manufacture the seal valves 20 and 25 and the rubber valve covers 50 to 56. In contrast, the head that has been pushed down by inserting the sleeve portion of the mouth into the spherical seal valve, the position of the head in the sleeve when the mouth is removed. A seal valve 60 in which a cushion part to be restored to a predetermined position is integrally formed is used.

  The branch pipe portion 14 of the pipe body 10 is different from the branch pipe portion 13 shown in the mixed injection pipes 1a to 1g in the embodiments of FIGS. 4 to 10, and an engagement convex portion 14a is provided on the inner peripheral surface thereof. The seal valve 60 is formed on a substantially trumpet-shaped position-recoverable cushion portion 60a, a substantially hemispherical head 60b continuous to the cushion portion 60a, and an upper surface of the substantially hemispherical head 60b. It has the receiving part 60c of the opening | mouth part 44 of the injection device 40, the through-hole 60d formed in the center part of this receiving part 60c, and the base 60e of the lower end of the said cushion part 60a. The cap 35 has an engaging recess 35a, a sleeve portion 35b, a threaded piece 35c on the outer periphery at the upper end of the sleeve portion 35, a flange portion 35d on the inner periphery at the upper end of the sleeve portion 35b, and the flange 35d. It has a concave arcuate part 35e connecting the part 35d and the inner peripheral surface. The head 60b of the seal valve 60 receives a tightening force by the concave arcuate portion 35e of the sleeve portion 35b, and the valve hole 60d is pressure-tightly sealed. Further, the base portion 60 e of the cushion portion 60 a of the seal valve 60 is sandwiched between the flange portion 10 b of the pipe body 10 and the lower end of the cap 35.

  FIG. 11B shows a state where the syringe 40 is screwed (twist-locked) with the mixed injection tube 1h of the ninth embodiment, and the cushion portion 60a of the seal valve 60 is pushed down by the mouth portion 44 of the syringe 40. Then, the head 60b is released from the tightening force by the arc-shaped portion 35e of the cap 35, and as the head 60b is pressed and deformed, as shown in FIG. 60d opens and the blood and the chemical | medical solution in the syringe 40 can be mixedly injected into the blood and the chemical | medical solution of an infusion circuit via the mixed injection tube 1h. Further, since the base portion 60e of the seal valve 60 is sandwiched between the flange portion 10b of the pipe body 10 and the lower end of the cap 35, the lower end of the cushion portion 60a of the seal valve 60 is centered when the seal valve 60 is pressed and deformed. The cushion part 60a is not closed by closing.

  According to the mixed injection tube 1h of the ninth embodiment, the height position of the head portion 60b substantially coincides with the upper end position of the sleeve portion 35b by the cushion portion 60a of the seal valve 60. Similarly to the mixed injection tubes 1a to 1g of the second to eighth embodiments shown in FIG. 10, blood and chemicals stay in the head 60c of the seal valve 60 after the mouth portion 44 of the syringe 40 is removed from the sleeve portion 35b. Even if it is done, it can be easily wiped off with gauze or cotton soaked in alcohol. Moreover, the manufacture, assembly, maintenance, etc. of the mixed injection tube 1h are facilitated as compared with the case where the seal valve and the rubber valve cover are separately manufactured and these seal valves and the rubber valve cover are used in combination. .

  FIGS. 12A and 12B show a mixed injection tube 1i of the tenth embodiment. This mixed injection pipe 1i uses an improved cap 36 and seal valve 61. That is, the cap 36 has an engaging convex portion 36a on the inner peripheral surface at the lower end, a sleeve portion 36b, a threaded piece 36c on the outer peripheral surface at the upper end of the sleeve portion 36b, a flange portion 36d on the inner peripheral surface at the upper end, and a flange portion 36d. And a concave arcuate portion 36e between the inner surface portion and the inner surface portion. Further, the seal valve 61 includes a substantially inverted conical standing leg portion 61a, a spherical head portion 61b continuous with the standing leg portion 61a, a receiving portion 61c on the upper surface of the head portion 61b, and a central portion of the receiving portion 61c. And a disc-shaped cushion portion 61e extending horizontally from the lower end of the standing leg portion 61a outward. The head portion 61b of the seal valve 61 is tightened with the concave arc-shaped portion 36e of the cap 36, and the valve hole 61d is normally crimped and sealed, and the cushion portion 61e of the seal valve 61 is connected to the upper end surface of the branch pipe portion 13. And the cap 36.

  FIG. 12B shows a state in which the syringe 40 is screwed (twisted) with the mixed injection tube 1i of the tenth embodiment. When the seal valve 61 is pressed by the mouth portion 44 of the syringe 40, the cushion portion 61e is pushed down, so that the head portion 62b is released from the tightening force by the concave arc-shaped portion 36e of the cap 36, and the valve hole 61d is formed. It opens and can mix blood and the chemical | medical solution in the syringe 40 into the blood and chemical | medical solution of an infusion circuit via the mixed injection pipe | tube 1i.

  FIG. 13 shows a mixed injection tube 1j of the eleventh embodiment. This mixed injection pipe 1j is a modification of the mixed injection pipe 1i of the tenth embodiment shown in FIG. 12, and the shape of the seal valve 62 is different. That is, the seal valve 62 includes a cylindrical standing leg part 62a, a spherical head part 62b continuous to the standing leg part 62a, a valve hole 62c formed in the center part of the head part 62b, and the standing leg part 62a. A cushion part 62d extending outward from the lower end and a concave arcuate part 62e falling from the cushion part 62d along the inner surface of the branch pipe portion 13 and extending toward the lower end of the standing leg part 62a. Then, the spherical head portion 62b of the seal valve 62 is tightened by the arc-shaped portion 36e of the cap 36, the valve hole 62c provided in the head portion 62b is crimped and sealed, and the flange portion 62d of the seal valve 62 is connected to the branch pipe portion 13. Is sandwiched between the upper end surface and the lower surface of the cap 36.

  According to the mixed injection tube 1j of the eleventh embodiment, the same function as that of the mixed injection tube 1i of the tenth embodiment shown in FIG. 12 is obtained, and the head 62b of the seal valve 62 is spherical. Therefore, the head 62b is easily deformed when pressed by the mouth portion 44 of the syringe 40, the valve hole 62c is reliably opened, and the presence of the concave arc-shaped portion 62e when the syringe 40 is removed. Therefore, the position restoring force of the cushion part 62d is also excellent, and the valve hole 62c can be securely crimped and sealed. Furthermore, since the head portion 62b is substantially the same height as the upper end portion of the sleeve portion 36b of the cap 36, it is easy to wipe off the blood and chemicals accumulated on the upper surface of the head portion 62b. Furthermore, the concave arc-shaped portion 62e that falls along the inner surface of the branch pipe portion 13 further enhances the sealing performance of the branch pipe portion 13, the seal valve 62, and the cap 36.

  FIG. 14 shows a mixed injection tube 1k according to the twelfth embodiment. This mixed injection pipe 1k is obtained by arranging a rubber valve cover 57 on a seal valve 63. That is, as shown in the embodiment of FIG. 12, it is desirable to use only the seal valve 61, but depending on the material of the seal valve 63 and the like, there are cases where the standing leg portion cannot be formed long. In such a case, it is effective to arrange the rubber valve cover 57 on the seal valve 63 as in this embodiment.

  The cap 37 includes an engaging convex portion 37a, a sleeve portion 37b, a screwing piece 37c, and a flange portion 37d. The seal valve 63 includes a standing leg portion 63a in a substantially spherical head portion 63b, a ring portion 63c is formed on the upper surface of the head portion 63b, and a valve hole 63d is formed in the center portion of the ring portion 63c. The rubber valve cover 57 disposed on the seal valve 63 is formed in a flat cylindrical shape having a top plate 57a and a bottom plate 57b. The rubber plate cover 57 has a through-hole 57c in the center of the top plate 57a and a seal on the bottom plate 57b. There is a hole 57d into which the ring portion 63c of the valve 63 is fitted. The height position of the top plate 57 a of the rubber valve cover 57 substantially coincides with the upper end position of the sleeve portion 37 b of the cap 37.

  According to the above twelfth embodiment, even if blood or a chemical solution stays in the head portion 63b of the seal valve 63, it is covered by the rubber valve cover 57 disposed on the head or the liquid 63. The chemical solution can be prevented from being contaminated by airborne bacteria. In the unlikely event that blood or chemical liquid stays on the rubber valve cover 57, the height position of the top plate 57a of the rubber valve cover 57 substantially coincides with the upper end position of the sleeve portion of the cap 37. Therefore, it is possible to easily wipe off the staying blood and chemicals.

  FIG. 15 shows a mixed injection tube 1m according to the thirteenth embodiment. This mixed injection tube 1 m is obtained by placing a seal valve 64 on the flange 10 b of the tube body 10 and fitting a cap 38 into the branch tube portion 13 of the tube body 10. An engaging protrusion 13a is formed on the upper end of the outer peripheral surface of the branch pipe portion 13, and the cap 38 has an engaging convex portion 38a on the inner peripheral surface of the lower end, a sleeve portion 38b, and an upper end outer periphery of the sleeve portion 38b. A threaded piece 38c is formed on the surface, a flange portion 38d is formed on the inner periphery of the upper end, and a cross-sectional shape formed between the inner end of the flange portion 38d and the inner surface portion of the sleeve portion 38b is a concave arc-shaped portion 38e. Further, the seal valve 64 includes a cushion portion 64a that expands downward in a trumpet shape, a cylindrical portion 64b that continues to the cushion portion 64a, and a hemispherical head portion 64c that continues to the cylindrical portion 64b. The ring portion 64d is formed in the head portion 64c, and the valve hole 64e is formed in the center portion of the ring portion 64d.

  In the mixed injection tube 1m of the thirteenth embodiment, the seal valve 64 is normally pushed upward by the cushioning action of the cushion portion 64a, and the hemispherical head portion 64c is pressed by the concave arc-shaped portion 38e of the cap 38. Due to the tightening force of the head 64c by the concave arcuate portion 38e, the valve hole 64e is in a pressure sealed state. Further, when the mouth portion 44 of the syringe 40 is inserted into the sleeve portion 38b of the cap 38 and the female screw portion 46 of the collar portion 45 is screwed into the screwing piece 38c of the cap 38, the cushion portion 64a of the seal valve 64 is elastically elastic. As a result of being pushed down against the force and releasing the head 64c of the seal valve 64 from the tightening force by the concave arcuate portion 38e of the cap 38, the valve hole 64e of the seal valve 64 opens.

  FIG. 16A shows a mixed injection tube 1n according to the fourteenth embodiment. In this mixed injection tube 1n, the seal valve 65 is placed on the flange portion 10b of the mixed body 10, and the cap 30 is fitted into the branch tube portion 13 of the tube body 10. Since the cap 30 is substantially the same as the cap 30 shown in FIG. 1, the corresponding parts are denoted by the same reference numerals, and the description thereof is omitted. As shown in FIGS. 16 (A) and 16 (B), the seal valve 65 has a cushion portion 65a that expands in an arch shape with a larger opening angle than the cushion portion 64a in FIG. 15, and the cushion portion 65a. It has a continuous cylindrical portion 65b and a head portion 65c continuous to the cylindrical portion 65b. The upper surface of the head portion 65c is formed into an arch-shaped concave shape 65d, and a concave portion having a V-shaped cross section at the center. A groove 65e is formed, and a valve hole 65f is formed at the center of the concave groove 65e.

  In the mixed injection tube 1n according to the fourteenth embodiment, the cushion portion 65a of the seal valve 65 is placed on the flange portion 10b of the tube body 10, the cap 30 is put on, and the convex portion 30a for engagement is formed on the branch tube portion 13. When engaged with the engaging convex portion 13a, the sealing valve 65 is normally lifted by the elastic force of the cushion portion 65a of the sealing valve 65, and its head portion 65c is pressed against the concave arc-shaped portion 30f of the cap 30 to form a concave portion. Due to the tightening force of the head portion 65c by the arc-shaped portion 30f, the valve hole 65f is brought into a pressure-tight state. Further, when the mouth portion 44 of the syringe 40 is inserted into the sleeve portion 30 c of the cap 30 and the female screw portion 46 of the collar portion 45 is screwed into the screwing piece 30 d of the cap 30, the seal valve 65 is cushioned at the mouth portion 44. It is pushed down against the elastic force of 65a, the head 65c is released from the tightening force by the concave arcuate portion 30f of the cap 30, and the valve hole 65f is opened.

  Here, an arch-shaped concave shape 65d is formed on the upper surface of the head 65c of the seal valve 65, and a concave groove 65e having a V-shaped cross-section is formed at the center of the central portion of the concave groove 65e. Since the valve hole 65f is formed, the valve hole 65f is always easily crimped and sealed by the tightening force of the concave arcuate portion 30f of the cap 30 as compared with the seal valve 64 in FIG. Further, when the mouth portion 44 of the syringe 40 is inserted into the sleeve portion 30c of the cap 30, the seal valve 65 is deformed and the valve hole 65f is easily opened. Further, when blood or infusion remains on the head 65c, the remaining blood or infusion tends to collect in the center by the arch-shaped concave surface shape 65d, so that the wiping operation is facilitated.

  FIG. 17 shows a mixed injection tube 1p according to the fifteenth embodiment. This mixed injection pipe 1p is a combination of a hemispherical seal valve 21 and a celestial cylindrical rubber valve cover 58. The seal valve 21 is shown in FIG. 3 (A) as shown in FIG. 17 (B). Since it is almost the same as the seal valve 21, the same reference numerals are given to the corresponding parts, and the description thereof is omitted. Moreover, since the cap 32 is the same as the cap 32 shown in FIG. 7, the same code | symbol is attached | subjected to the same part and the description is abbreviate | omitted. The rubber valve cover 58 has an unprecedented new shape, and as shown in FIG. 17C, a cylindrical standing leg 58a, a ceiling 58b continuous to the standing leg 58a, and the center of the ceiling 58b. A through hole 58c formed in the portion, a flat portion 58d formed in the shoulder portion of the ceiling portion 58b, and a flange portion 58e formed in the inner periphery of the lower end of the standing leg portion 58a. The ceiling portion 58b is formed such that the upper surface 58f and the lower surface 58g are formed in an arched concave shape so that the ceiling portion 58b is easily deformed.

  In the mixed injection pipe 1p of the fifteenth embodiment, the seal valve 21 is placed on the flange 10b of the pipe body 10, the rubber valve cover 58 is placed on the seal valve 21, and the cap 31 is placed from above. It is fitted into the branch pipe portion 13 of the pipe body 10. Normally, the valve hole 21b is in a pressure-tight sealed state by the tightening force of the seal valve 21 by the concave arc-shaped portion 32b of the cap 32. When the mouth portion 44 of the syringe 40 is inserted into the sleeve portion 32 c of the cap 32 and the female screw portion 46 of the collar portion 45 is screwed into the screwing piece 32 d of the cap 32, the rubber valve cover 58 and the seal valve 21 are brought into the mouth portion 44. And the valve hole 21b of the seal valve 21 is opened, and the blood and the infusion solution of the syringe 40 are converted into the infusion solution of the mixed injection tube 1p through the through hole 58c of the rubber valve cover 58 and the valve hole 21b of the seal valve 65. Can be mixed. It should be noted that a slight gap is provided between the inner peripheral surface of the sleeve portion 32c of the cap 32 and the outer peripheral surface of the cylindrical portion 58a of the rubber valve cover 58, as shown in the figure. Deformation is easy.

  FIG. 18 shows a mixed injection tube 1q according to the sixteenth embodiment. This mixed injection tube 1q is a combination of a hemispherical seal valve 21 and a cylindrical rubber valve cover 59. Since the seal valve 21 and the cap 32 are the same as the seal valve 21 and the cap 32 of FIG. 17, the same parts are denoted by the same reference numerals and the description thereof is omitted. The rubber valve cover 59 has an unprecedented new form. As shown in FIG. 18B, the rubber valve cover 59 is formed by combining a substantially cylindrical member 59a and a cap-like member 59b placed thereon to form a dome-like cylinder. The substantially cylindrical member 59a has a convex arcuate surface 59c at the upper end of the inner peripheral surface and a flange 59d at the lower end of the outer peripheral surface. Further, the cap-like member 59b has an upper surface 59f of the ceiling portion 59e formed in a concave shape and a lower surface formed in a flat shape. A through hole 59g is formed at the center of the ceiling portion 59e, and a stepped portion 59h is formed at the upper shoulder.

  In the mixed injection pipe 1q of the sixteenth embodiment, the seal valve 21 is placed on the flange 10b of the pipe body 10, the rubber valve cover 59 is placed on the seal valve 21, and the cap 32 is placed from above. It is fitted into the branch pipe portion 13 of the pipe body 10. Normally, the valve hole 21b of the seal valve 21 is in a pressure-tight sealed state by the tightening force of the concave arcuate portion 32b of the cap 32. When the mouth part 44 of the syringe 40 is inserted into the sleeve part 32 c of the cap 32 and the female thread part 46 of the collar part 45 is screwed into the screwing piece 32 d of the cap 32, the rubber valve cover 59 and the seal valve 21 are brought into the mouth part 44. And the valve hole 21b of the seal valve 21 is opened, and the blood and infusion of the syringe 40 are transferred to the infusion of the mixed injection tube 1q through the through hole 59g of the rubber valve cover 58 and the valve hole 21b of the seal valve 65. Can be mixed.

  Here, the substantially cylindrical member 59a has a smaller cross-sectional area of the blood or infusion flow channel than the rubber valve cover described so far, and the retention amount of the blood or infusion remaining in the flow channel. Can be reduced. Further, the stepped portion 59h of the upper shoulder portion of the cap-shaped member 59b of the rubber valve cover 59 is in contact with the lower surface of the flange portion 32e of the cap 32 to prevent the rubber valve cover 59 from coming off.

  FIGS. 19A and 19B show a mixed injection tube 1r of the seventeenth embodiment. The mixed injection pipe 1r is configured such that a substantially cylindrical seal valve 23 can be attached to the branch pipe portion of the pipe body 10 without using a cap. The branch pipe portion of the mixed injection pipe 1r, that is, the sleeve portion 15 is formed integrally with the pipe body 10, and as shown in FIGS. 20A and 20B, the cross-sectional shape is V-shaped at the upper part of the inner peripheral surface thereof. A recess 15a for engagement is formed, a step portion 15b is formed at a position below the recess 15a, and a screwing piece 15c is formed at the upper end of the outer peripheral surface. Further, the seal valve 23 has a substantially cylindrical portion 23a and a ceiling portion 23b continuous with the substantially cylindrical portion 23a. The upper surface 23c of the ceiling portion 23b is formed in an arched concave shape, and the lower surface 23d is an arched convex surface. A concave groove 23e having a V-shaped cross section is formed in the ceiling portion 23b, and a valve hole 23f is formed in the central portion of the concave groove 23e. Further, a planar portion 23g is formed on the upper shoulder portion of the ceiling portion 23b. Further, the ring-shaped fixture 16 having the engaging convex portion 16 a on the outer peripheral surface is inserted into the sleeve portion 15 from above the seal valve 23, and the engaging convex portion 16 a is inserted into the engaging concave portion of the sleeve portion 15. The seal valve 23 is detachably mounted by being fitted into 15a.

  In this mixed injection pipe 1r, the seal valve 23 is inserted into the sleeve part 15, the lower end of the substantially cylindrical part 23a is placed on the step part 10 of the pipe body 10, and the ring-shaped fixture 16 is fitted from above. The seal valve 23 receives a compressive force by the inner surface of the sleeve portion 15 or by the ring-shaped fixture 16, and the valve hole 23f is brought into a pressure-tight sealed state. At this time, since the lower surface 23d of the ceiling portion 23b of the seal valve 23 is formed in an arch-shaped convex shape, the valve hole 23f of the lower surface 23d of the ceiling portion 23b is closed against the internal pressure of the infusion of the mixed injection tube 10. Since such stress acts, the infusion is prevented from leaking due to the internal pressure. Further, when the mouth portion 44 of the syringe 40 is inserted into the sleeve portion 15, the seal valve 23 is pressed and deformed to open the valve hole 23f. At this time, the upper surface 23c of the ceiling portion 23b is formed in an arch-shaped concave shape, and a V-shaped concave groove 23e is formed, and a valve hole 23f is formed in the concave groove 23e. The seal valve 23 is easily pressed and deformed by the portion 44, and the valve hole 23f is reliably opened. Further, when the mouth portion 44 of the syringe 40 is removed from the sleeve portion 15, the seal valve 23 is reliably restored to the original shape by the arch-shaped convex shape of the lower surface 23d of the ceiling portion 23b, and the valve hole 23f is crimped again. Sealed.

  Since the mixed injection pipe 1r is detachably mounted with the seal valve 23 by the ring-shaped fixture 16, the first mounting operation of the seal valve 23 into the sleeve portion 15 or replacement when the seal valve 23 is worn or damaged. Work can be carried out easily. Further, since the ring-shaped fixture 16 has a vertically symmetrical shape, when inserted into the sleeve portion 15, it is not necessary to determine the vertical direction. In addition, as in the embodiment described so far, the structure of the syringe connection port portion becomes simpler than that in which the caps 30 to 37 are attached to the branch tube portions 13 and 14, the external dimensions are small, and A clean appearance is possible.

  By inserting the ring-shaped fixture 16 into the sleeve portion 15, the upper surface 23 c of the seal valve 23 is slightly lower than the upper end of the sleeve portion 15. The wiping operation of the blood and the infusion remaining on the upper surface 23c is hardly hindered. On the other hand, the ring-shaped fixture 16 becomes a guide when the mouth portion 44 of the syringe 40 is inserted due to the step, and the sleeve portion of the mouth portion 44 There is an advantage that the inserting operation into the tube 15 can be performed easily and stably.

  Further, since the thickness of the substantially cylindrical portion 23a of the seal valve 23 is formed so as to go downward, the thickness of the cylindrical portion is lower than that of the cylindrical portion as compared with the case where the cylindrical portion has the same thickness. It is not necessary to form a portion, and the cross-sectional area of the flow path of blood and infusion fluid of the seal valve 23 can be reduced, so that the amount of blood and infusion remaining in the seal valve 23 can be reduced. However, you may form a collar part in the lower end of a cylindrical part.

  In addition, in the sealing valves 20 to 23 and the sealing valves 61 to 65 described so far, the valve holes 20b, 25b, 23f, 60d, 61d, 62c, Since a larger compressive stress acts in the vicinity of 63d, 64e, and 65f, the valve holes 20b, 25b, and 23f, and 60d, 61d, 62c, 63d, 64e, and 65f have an excellent effect of being securely crimped and sealed. The present invention is not limited to this, and although not shown in the drawings, for example, both the upper surface and the lower surface may be planar, or both the upper surface and the lower surface may have an arched convex shape. Alternatively, the upper surface may be planar and the lower surface may be an arch-shaped concave shape or arch-shaped convex shape, or the lower surface may be planar and the upper surface may be an arch-shaped concave shape or arch-shaped convex shape. Furthermore, the upper surface may be formed into an arch-shaped concave shape and the lower surface may be formed into a flat shape or an arch-shaped convex shape, or the upper surface may be formed into an arch-shaped convex shape and the lower surface may be formed into a flat shape or an arch-shaped concave shape.

  Further, the through holes 50c to 58c and 59g of the rubber valve covers 50 to 59 do not prevent leakage of blood or infusion due to the internal pressure of the mixed injection pipe unlike the seal valve and the valve hole of the seal valve. Although it does not require crimping and sealing like a valve hole, for example, select either concave, convex or planar shape for the upper surface and select either concave, convex or planar shape for the lower surface, The shape can be determined.

  Although a plurality of exemplary embodiments of the present invention have been described above, the present invention is not limited only to these exemplary embodiments, and is within the meaning and scope of the matters described in the claims. Embodiments with configurations are intended to be included within the scope of the present invention. For example, in each embodiment, the case where the branch pipe portion and the sleeve portion are engaged by fitting the convex portions is described. However, the male screw portion is formed in one of the branch pipe portion and the sleeve portion, and the other An internal thread portion may be formed on the external thread portion, and the external thread portion and the internal thread portion may be screwed together to engage with each other.

  Moreover, you may make it selectively combine each structure in a pipe | tube main body, a cap, a seal valve, and a rubber valve cover demonstrated in each said embodiment. Furthermore, the cross-sectional shape that connects the inner surface of the collar portion of the cap to the inner surface of the sleeve portion may be a tapered surface instead of the concave arc-shaped portion.

  Although not shown, the seal valve can be a disk. However, in this case, it is necessary to mount the mounting position of the disc-shaped seal valve in the sleeve portion at a height position where the mouth portion of the syringe can be pressed and deformed. Also in this disc-shaped seal valve, the upper surface and the lower surface of the disc-shaped seal valve can be constituted by various combinations of a planar shape, an arch-shaped concave shape, and an arch-shaped convex shape, as described in the seal valve and the rubber valve cover. .

  Furthermore, although each said embodiment demonstrated the case where this invention was applied to a co-injection pipe | tube, this syringe connection port is applied also in containers, such as a chemical | medical solution container and a chemical | medical solution pack, and other piping, etc., and the same effect | action An effect can be obtained. Further, the number of branch pipe portions is not limited to one as shown in the embodiment, but may be plural.

(A) is a longitudinal cross-sectional view of the syringe connection port according to the first embodiment of the present invention, and (B) is a longitudinal cross-sectional view when a twist lock type needleless syringe is screwed into the syringe connection port of (A). . It is a longitudinal cross-sectional view of a twist lock type needleless syringe. (A) is a longitudinal cross-sectional view of the modification in the seal valve of this invention, (B) is a longitudinal cross-sectional view of another modification in a seal valve. (A) is a longitudinal cross-sectional view of the syringe connection port which concerns on 2nd Embodiment of this invention, (B) is a longitudinal cross-sectional view when a twist lock type needleless syringe is screwed together to the syringe connection port of (A). . It is a longitudinal cross-sectional view of the syringe connection port which concerns on 3rd Embodiment of this invention. It is a longitudinal cross-sectional view of the syringe connection port which concerns on 4th Embodiment of this invention. It is a longitudinal cross-sectional view of the syringe connection port which concerns on 5th Embodiment of this invention. It is a longitudinal cross-sectional view of the syringe connection port which concerns on 6th Embodiment of this invention. It is a longitudinal cross-sectional view of the syringe connection port which concerns on 7th Embodiment of this invention. It is a longitudinal cross-sectional view of the syringe connection port which concerns on 8th Embodiment of this invention. (A) is a longitudinal sectional view of a syringe connection port according to a ninth embodiment of the present invention, and (B) is a longitudinal sectional view when a twist lock type needleless syringe is screwed into the syringe connection port of (A). . (A) is a longitudinal cross-sectional view of a syringe connection port according to a tenth embodiment of the present invention, and (B) is a longitudinal cross-sectional view when a twist lock type needleless syringe is screwed into the syringe connection port of (A). . It is a longitudinal cross-sectional view of the syringe connection port which concerns on 11th Embodiment of this invention. (A) is a longitudinal cross-sectional view of a syringe connection port according to a twelfth embodiment of the present invention, (B) is a longitudinal cross-sectional view when a twist lock type needleless syringe is screwed into the syringe connection port of (A). . It is a longitudinal cross-sectional view of the syringe connection port which concerns on 13th Embodiment of this invention. (A) is a longitudinal sectional view of a syringe connection port according to a fourteenth embodiment of the present invention, and (B) is a longitudinal sectional view and a top view of the seal valve. (A) is a longitudinal sectional view of a syringe connection port according to a fifteenth embodiment of the present invention, (B) is a longitudinal sectional view of its seal valve, and (C) is a longitudinal sectional view of its rubber valve cover. (A) is a longitudinal cross-sectional view of the syringe connection port according to the sixteenth embodiment of the present invention, and (B) is a vertical cross-sectional view of the rubber valve cover. (A) is a longitudinal cross-sectional view of the syringe connection port which concerns on 17th Embodiment of this invention, (B) is a top view of the seal valve in the syringe connection port of (A). 19A is an enlarged longitudinal sectional view of a sleeve portion in the syringe connection port of FIG. 19, and FIG. 20B is an enlarged sectional view of a concave portion for engagement in the sleeve portion of FIG. It is a circuit diagram of an infusion circuit. It is a longitudinal cross-sectional view of the conventional mixed injection pipe.

Explanation of symbols

1,1a-1r Syringe connection port (needleless mixed injection tube)
DESCRIPTION OF SYMBOLS 10 Pipe | tube main body 10a Thin part 10b Eaves part 11, 12a Infusion tube connection port 13, 14 Branch pipe part 13a, 14a Engaging convex part 15 Sleeve part 15a Engaging concave part 15b Step part 15c Screwing piece 16 Ring-shaped fixing tool 16a Engagement Joint convex portion 16b Step portion 20, 21, 22, 23 Seal valve 20a Receiving portion 20b, 21b, 22b, 23f Valve hole 21d Ring portion 21e, 22e Recessed portion 22d Flat portion 25a Flat surface 30, 31-38 Cap 30a, 31a- 38a Engaging convex portion 30b, 31b to 34b, 35d, 36d Concave arc-shaped portion 30c, 31c to 34c, 35b to 38b Sleeve portion 30d, 31d to 34d, 35c to 38c Screwed piece 31e to 34e, 35d to 37d 35a Concave part for engagement 40 Twist lock type needleless syringe 44 mouth part 45 Collar portion 46 Female thread portion 50 to 59 Rubber valve cover 50c to 58c, 59g Through hole 58a Cylindrical portion 59a Substantially cylindrical member 59b Cap-shaped member 60 to 65 Seal valve 60a, 61e, 62d, 63e, 64a, 65a Cushion portion 60b to 63b, 64c, 65c Head 60d, 61d, 62c, 63d, 64e, 65f Valve hole

Claims (2)

A substantially hemispherical seal valve made of an elastic material having a valve hole at the center, attached to the opening of a container or pipe;
A sleeve part that is provided so as to surround the opening of the container or pipe, presses the seal valve, and crimps and seals the valve hole; and a sleeve part into which a mouth part of a twist lock type needleless syringe can be inserted;
In the state where the mouth of the twist lock type needleless syringe is inserted into the sleeve, without causing the tip of the mouth to penetrate the seal valve, and directly deforming the seal valve at the tip of the mouth, A syringe connection port characterized by opening a valve hole of a seal valve. The syringe connection port according to claim 1 , wherein the seal valve has one or both of a ring portion and a recess around the valve hole.