JP2007117210A - Mixed injection tube and valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mixed injection tube which can perform a plurality of blood sampling, an intravenous drip, injection of a liquid medicine, or measuring, etc. using a syringe without causing a hygienic problem. <P>SOLUTION: In the mixed injection tube 1 in which a branch pipe section 12 forming a bifurcated flow passage branching from a mainstream path is provided in the tube wall of a tube body 11 forming the mainstream path, the branch pipe section 12 has a valve mechanism BK having a valve body 31 which opens and closes the bifurcated flow passage and a mounting part TB for attaching a lock-type syringe, etc. to be connected to the bifurcated flow passage, the mounting part TB can be moved relative to the valve body 31 between a circulation position P1 and a waiting position P2, the valve mechanism BK opens when the mounting part TB is positioned at the circulation position P1 and closes when the mounting part TB is positioned at the waiting position P2 in a state where the syringe, etc. are attached to the mounting part TB. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a co-infusion tube and a valve device used for infusion, artificial dialysis, etc., in which a lock-type syringe or the like is attached without an injection needle attached and blood extraction, medicinal solution injection, or various measurements are performed. About.

  Conventionally, a mixed injection tube for providing a branch passage in the middle of a blood conduit formed outside the body has been used for extraction of blood by artificial dialysis.

  Conventionally, a mixed injection pipe having a rubber seal provided at a branching portion has been used. In this method, an injection needle attached to a syringe is pierced and penetrated through a seal body, and blood is branched and extracted from the main flow path via the injection needle. However, when an injection needle is used, there is a problem that the cost burden is large, such as the cost of the injection needle itself and the cost for discarding the used injection needle.

  In order to cope with this problem, various co-infusion tubes have been developed that can collect blood using a syringe without a syringe needle (Patent Documents 1 and 2). These are used by providing a slit-like portion penetrating the front and back at the center of a rubber seal body, and inserting the mouth portion of a syringe without a syringe needle into the slit-like portion.

  However, when such a conventional co-infusion tube is used, since the syringe is only sandwiched between the slit-like portions, there has been a problem that the syringe is likely to fall out of the rubber seal body.

In order to cope with this, an infusion tube improved so as not to fall off using a lock type syringe has been proposed (Patent Documents 3 and 4). These have a structure in which a cylindrical sleeve is provided on the upper surface of a cap of a mixed injection tube, and a female screw of a locking collar of a syringe is screwed into a screwing piece provided at the tip of the sleeve.
JP 2000-354636 A JP 2001-61971 A JP 2003-325678 A JP 2004-209278 A

  In the conventional mixed injection tube applicable to the lock type syringe described above, the syringe is securely attached to the mixed injection tube, so that the syringe does not fall out of the mixed injection tube, but the mixed injection tube can only be collected once. There is a problem that it cannot be used.

  That is, blood sampling may be performed a plurality of times at appropriate time intervals according to the progress of dialysis, for example. On the other hand, when blood is collected after attaching the syringe to the mixed injection tube, when the syringe is removed from the mixed injection tube, blood is attached to the surface of the rubber seal or the surface of another member. The blood adhering in this way is not preferable from the viewpoint of hygiene, and it is necessary to wipe it off immediately. However, in the conventional mixed injection tube applicable to the conventional lock type syringe, the blood adhering part is surrounded by the sleeve. It is very difficult to wipe off the blood and clean it because it is in the deep place.

  Therefore, conventionally, the same number of mixed injection tubes as the number of times of blood collection are provided in the pipeline in advance, and one is used for each blood collection. For this reason, the number of mixed injection pipes used increases, and there is a problem that the cost burden is large, such as the cost of the mixed injection pipe itself and the cost for discarding the used mixed injection pipe.

  The present invention has been made in view of the above-mentioned problems, and can be used for mixed blood injection, infusion, medicinal solution injection, or measurement using a syringe or the like without causing a sanitary problem. An object is to provide a pipe and valve device.

  The mixed injection pipe according to the present invention is a mixed injection pipe in which a branch pipe portion that forms a branch flow path that branches from the main flow path is provided on a tube wall of a pipe body that forms the main flow path. A valve mechanism having a valve body for opening and closing the branch flow path, and an attachment portion for attaching a lock type syringe or the like to connect to the branch flow passage, wherein the attachment portion has a distribution position and a standby state. The valve mechanism is movable relative to the valve body, and the valve mechanism is opened when the attachment portion is in the flow position in a state where the syringe or the like is attached to the attachment portion. Is configured to be closed when set to the standby position.

  Preferably, the valve body is made of a rubber material, and a slit-like portion that penetrates the front and back and closes tightly by an elastic force is provided at a center portion thereof, and the valve mechanism moves as the mounting portion moves. And has a moving valve body that can be inserted into the slit-like portion of the valve body and in which an internal flow path that is a part of the branch flow path is formed. The internal flow path is exposed to the main flow path through the shape portion, and the internal flow path is closed in the slit-shaped portion at the standby position.

  The movable valve body includes a cylindrical outer valve member, and an inner valve member that is disposed concentrically on the inner side of the outer valve member and is movable relative to the outer valve member in the axial direction. .

  Further, the outer valve member has an inner peripheral surface formed in a conical shape, the inner valve member has an outer peripheral surface that can be in close contact with the inner peripheral surface of the outer valve member, and the inner valve member And the outer valve member move relative to each other in the axial direction, thereby forming the internal flow path therebetween.

  Further, the inner valve member is provided so as to protrude outward in the axial direction with respect to the outer valve member, and when a syringe or the like is attached to the attachment portion, the tip of the mouth portion of the syringe or the like is The inner valve member and the outer valve member are moved relative to each other in the axial direction by abutting and pushing the protruding end of the inner valve member, thereby forming the inner flow path.

  The outer end of the outer valve member is provided with a recess into which a tip of a mouth of a syringe or the like is fitted, and the recess is an inner periphery formed in a conical surface shape extending outward. Sealing is performed by having an outer peripheral edge at the tip of the mouth of a syringe or the like abuts against the inner peripheral surface of the recess.

  The outer end of the inner valve member is provided with a circular cross-sectional protrusion having an outer diameter smaller than the inner diameter of the mouth of a syringe or the like at the center, and connected to the outer peripheral surface of the inner valve member. A concave groove is formed.

  The valve main body is disposed in a substantially cylindrical branch pipe base provided in the pipe main body, and is slidable in the axial direction by being externally fitted to the outer peripheral surface of the branch pipe base. The cap member has a sleeve portion having an inner peripheral surface that surrounds and supports the outer peripheral surface of the outer valve member, and the syringe or the like is provided on the outer peripheral surface of the sleeve portion. An engaging piece for engaging with the female screw of the locking collar is provided.

  Further, the outer end of the outer valve member is provided so as to protrude outward in the axial direction with respect to the sleeve portion, and the female screw such as a syringe is engaged with the engaging piece. Sometimes the tip of the mouth of the syringe or the like abuts against the end of the outer valve member and the protruding end of the inner valve member and pushes them into the sleeve.

  Further, the inner peripheral surface of the sleeve portion is formed in a conical surface shape, and the outer peripheral surface of the outer valve member is formed in a conical surface shape that can be in close contact with the inner peripheral surface of the sleeve portion, and the inner valve The member and the outer valve member are biased so as to be directed outward in the axial direction by the elastic force of the valve main body. With this, in a state where a syringe or the like is not attached to the attachment portion, The outer peripheral surface is in close contact with the inner peripheral surface of the sleeve portion and sealed, and the outer peripheral surface of the inner valve member is in close contact with the inner peripheral surface of the outer valve member and sealed.

  Further, a locking projection that protrudes inward in the radial direction from the inner peripheral surface is provided at a position of the inner peripheral surface of the cap member that is externally fitted to the outer peripheral surface of the branch pipe base. A holding projection for holding the cap member at the distribution position and the standby position by contacting the locking projection is provided on the outer peripheral surface.

  In addition, a stopper is provided on the outer peripheral surface of the branch pipe base so as to abut against the locking projection and restrict the circumferential rotation angle of the cap member.

  The valve device according to the present invention is a valve device that is attached to an opening of a fluid container or a pipe line and draws out a branch channel connected to the fluid container or the pipe line, and opens and closes the branch channel. A valve mechanism having a valve main body to be attached, and an attachment part for attaching a locking syringe or the like to connect to the branch flow path, and the attachment part is between the flow position and the standby position. The valve mechanism is movable with respect to the valve body, and the valve mechanism is opened when the attachment portion is set as the flow position in a state where the syringe is attached to the attachment portion, and the attachment portion is set as the standby position. When configured to close.

  Preferably, the valve body is made of a rubber material, and a slit-like portion that penetrates the front and back and closes tightly by an elastic force is provided at a center portion thereof, and the valve mechanism moves as the mounting portion moves. And has a moving valve body that can be inserted into the slit-like portion of the valve body and in which an internal flow path that is a part of the branch flow path is formed. The internal flow path is exposed to the main flow path through the shape portion, and the internal flow path is closed in the slit-shaped portion at the standby position.

  According to the present invention, it is possible to perform blood sampling, drip, infusion, measurement, or the like multiple times using a syringe or the like without causing any sanitary problems.

  1 is a cross-sectional front view of a mixed injection pipe 1 according to an embodiment of the present invention, FIG. 2 is a cross-sectional front view showing a state of a standby position P2 of the mixed injection pipe 1, and FIG. FIG. 4 is a sectional view showing a part of FIG. 2 in an enlarged manner, FIG. 5 is a plan view showing the moving valve body 40 as viewed from above, and FIG. 6 is a part as seen from above the cap member 50. FIG. 7 is a cross-sectional front view of the cap member 50, FIG. 8 is an enlarged cross-sectional view showing the state of the cap member 50 in the standby position and the flow position, and FIG. FIG. 10 is a view showing the shape of the valve body 31, FIG. 11 is a sectional view showing another example of the valve body 31, and FIG. 12 is a sectional view showing another example of the valve body 31. .

  1 to 4, the mixed injection pipe 1 forms a pipe main body 11 that forms the main flow path SR, and a branch flow path BR that is provided on the pipe wall of the trunk portion 21 of the pipe main body 11 and branches from the main flow path SR. It consists of a branch pipe section 12.

  The tube body 11 is formed in a substantially cylindrical shape from a synthetic resin material such as polypropylene. The tube body 11 includes a central body portion 21 and ports 22 and 23 provided at both ends of the body portion 21 for connecting a piping member HB such as a tube.

  The branch pipe part 12 has a valve mechanism BK having a valve body 31 for opening and closing the branch flow path BR, and an attachment part TB for attaching a lock type syringe TK and connecting to the branch flow path BR.

  The attachment portion TB is movable with respect to the valve body 31 between the flow position P1 and the standby position P2.

  The valve mechanism BK is configured to open when the attachment portion TB is set to the flow position P1 and closed when the attachment portion TB is set to the standby position P2 in a state where the syringe TK is attached to the attachment portion TB.

  The valve body 31 is made of a rubber material such as silicon rubber, isoprene rubber, or butyl rubber, and a slit-like portion 32 that penetrates the front and back and closes tightly by elastic force is provided at the center thereof.

The valve mechanism BK moves along with the movement of the attachment portion TB and can be inserted into the slit-like portion 32 of the valve body 31 and the movable valve body in which the internal flow path BN that is a part of the branch flow path BR is formed. 40. The moving valve body 40 penetrates the slit-shaped portion 32 at the flow position P1 and the internal flow path BN is exposed to the main flow path SR, and the internal flow path BN is closed in the slit-shaped section 32 at the standby position P2.
The movable valve body 40 includes a cylindrical outer valve member 41 and an inner valve member 42 that is disposed concentrically inside the outer valve member 41 and is movable relative to the outer valve member 41 in the axial direction.

  The outer valve member 41 has an inner peripheral surface 411 formed in a conical surface shape. The inner valve member 42 has an outer peripheral surface 421 that can be in close contact with the inner peripheral surface 411 of the outer valve member 41. The inner valve member 42 and the outer valve member 41 move relative to each other in the axial direction, so that a gap is formed between them, and thus the internal flow path BN described above is actually formed.

  The inner valve member 42 protrudes outward in the axial direction with respect to the outer valve member 41. When the syringe TK is attached to the attachment portion TB as shown in FIGS. The tip of the mouth portion TKK abuts against the protruding end of the inner valve member 42 and pushes it downward in the figure, whereby the inner valve member 42 and the outer valve member 41 move relative to each other in the axial direction to form an internal flow path BN. It has come to be.

  A concave portion 412 into which the tip of the mouth portion TKK of the syringe TK is fitted is provided at the outer end portion of the outer valve member 41. The concave portion 412 has an inner peripheral surface 413 formed in a conical surface shape that expands outward, and the outer peripheral edge of the tip of the mouth portion TKK of the syringe TK abuts on the inner peripheral surface 413 of the concave portion 412. Sealing is performed.

  The outer end portion of the inner valve member 42 is provided with a circular hemispherical protrusion 422 having an outer diameter smaller than the inner diameter of the mouth TKK of the syringe TK at the center thereof, and includes the protrusion 422 as well. A recessed groove 423 that communicates with the outer peripheral surface 421 of the inner valve member 42 is formed at the above position.

  The valve main body 31 is arranged in a substantially cylindrical branch pipe base 33 provided integrally with the pipe main body 11. The branch pipe base 33 is provided with a cap member 50 that is fitted on the outer peripheral surface of the branch pipe base 33 and is slidable in the axial direction and the rotational direction.

  The cap member 50 includes a cap body 51 and a sleeve portion 52, and has a two-stage bottomed cylindrical shape. The cap body 51 is fitted on the outer peripheral surface of the branch pipe base 33 and is slidable in the axial direction. The sleeve portion 52 has an inner peripheral surface 521 surrounding an outer peripheral surface 414 of the outer valve member 41, and supports the outer valve member 41 so that the axial center position is stabilized by positioning in the radial direction. On the outer peripheral surface of the sleeve portion 52, an engaging portion piece 522 is provided which is engaged with the female screw TKM of the locking collar TKC of the syringe TK. As shown in FIG. 6, two engaging piece 522 are provided at an angular position of 180 degrees on the outer peripheral surface of the sleeve portion 52.

  The entire sleeve portion 52 or cap member 50 provided with the engaging piece 522 corresponds to the attachment portion TB in the present invention.

  The outer end portion of the outer valve member 41 is provided so as to protrude outward in the axial direction with respect to the sleeve portion 52, and when the female screw TKM of the syringe TK is engaged with the engaging portion piece 522. The tip of the mouth portion TKK of the syringe TK abuts against the end portion of the outer valve member 41 and the protruding end of the inner valve member 42 and pushes them inward of the sleeve portion 52 as shown in FIGS. Push in.

  The inner peripheral surface 521 of the sleeve portion 52 is formed in a conical surface shape, and the outer peripheral surface 414 of the outer valve member 41 is formed in a conical surface shape that can be in close contact with the inner peripheral surface 521 of the sleeve portion 52.

  The inner valve member 42 and the outer valve member 41 are biased outward in the axial direction by the elastic force of the valve body 31, so that the outer circumference of the outer valve member 41 is not attached to the syringe TK. The surface 414 is in close contact with the inner peripheral surface 521 of the sleeve portion 52, and the outer peripheral surface 421 of the inner valve member 42 is in close contact with the inner peripheral surface 411 of the outer valve member 41 and sealed.

  A locking projection 511 that protrudes radially inward from the inner peripheral surface of the cap member 51 is provided on the inner peripheral surface of the branch pipe base 33 on the inner peripheral surface of the cap member 50, that is, on the inner peripheral surface of the cap body 51. Is provided. On the outer peripheral surface of the branch pipe base 33, holding projections 331 and 332 are provided for holding the cap member 50 in the flow position P1 and the standby position P2 by contacting the locking projection 511 in the axial direction. Further, a stopper 333 is provided on the outer peripheral surface of the branch pipe base 33 to abut against the locking projection 511 and restrict the rotational angle of the cap member 50 in the circumferential direction.

  This will be described in more detail below.

  In FIG. 1, the valve body 31 is housed in a compressed state inside the branch pipe base 33. A holding member 34 for preventing the valve body 31 from coming off is provided on the upper part of the valve body 31. The holding member 34 has an annular shape, and is fitted over the protruding portion 334 provided on the inner peripheral surface of the upper end portion of the branch pipe base portion 33 by elastic deformation.

  The holding member 34 can be omitted. This is when the holding member 34 is omitted. You may form the internal peripheral surface of the branch pipe base 33 in a straight circumferential surface, without providing the projection part 334. FIG.

  As is well shown in FIG. 10, the valve main body 31 is provided with a disk-shaped protrusion 312 on the top of a cylindrical body 311 and a truncated cone-shaped protrusion 313 on the bottom. The slit-like portion 32 is provided so as to penetrate from the upper surface of the valve body 31 to the lower surface (back surface). The width dimension of the slit-like portion 32 is a little smaller than the outer diameter of the protruding portion 312.

  Returning to FIG. 1, since the valve body 31 is stored in a compressed state, a compressive stress is generated inside the valve body 31, and the slit-like portion 32 is tightly closed by the elastic force thereby. . When the moving valve body 40 is inserted into the slit-like portion 32, the slit-like portion 32 is pushed and expanded by the moving valve body 40, but the surface of the slit-like portion 32 is elastically adhered to the outer peripheral surface of the moving valve body 40. , They are sealed.

  Therefore, as shown in FIG. 2, when the moving valve body 40 is at the standby position P <b> 2, the inner valve member 42 may penetrate the slit-shaped portion 32, but the outer valve member 41 is in the slit-shaped portion 32. Therefore, the opening below the gap forming the internal channel BN and the part below the opening of the outer peripheral surface 421 of the inner valve member 42 are blocked by the surface of the slit-like portion 32, and the internal channel BN It is in a closed state in the slit-like portion 32.

  Further, as shown in FIG. 3, when the moving valve body 40 is at the flow position P1, both the inner valve member 42 and the outer valve member 41 penetrate the slit-like portion 32, and therefore the inner flow path BN is the main flow path SR. Exposed to. In this state, the branch flow path BR formed including the internal flow path BN communicates with the main flow path SR, whereby the fluid flowing through the main flow path SR also flows into the branch flow path BR. The fluid that has flowed into the branch flow path BR can flow into the mouth TKK through the concave groove 423.

  In the state where the outer valve member 41 or the like has penetrated the slit-shaped portion 32, the outer valve member 41 does not necessarily protrude from the valve body 31. Since the valve body 31 is made of a rubber material and has great flexibility, the valve body 31 is also outside even when the internal passage BN is exposed through the valve body 31 and the inner valve member 42 depending on the shape and holding state thereof. It may be present in front of the valve member 41.

  As well shown in FIGS. 4 and 5, the hemispherical protrusion 422 provided at the upper end of the inner valve member 42 can enter the opening of the mouth TKK. Therefore, when the mouth portion TKK of the syringe TK is to be attached to the attachment portion TB from the state shown in FIG. 1, the projection 422 is placed in the opening portion of the mouth portion TKK, and is pushed downward in that state. Thus, the moving valve body 40 can be easily pushed into the sleeve portion 52 without the mouth portion TKK and the protrusion 422 engaging and disengaging. The syringe TK is attached to the attachment portion TB as shown in FIGS. 2 to 4 by rotating the syringe TK and screwing the female screw TKM into the engagement portion piece 522 in the pushed state.

  In this state, the tip of the mouth portion TKK of the syringe TK comes into contact with the inner peripheral surface 413 of the concave portion 412 of the outer valve member 41 to perform sealing, so that the branch flow path BR and the mouth portion TKK leak to the outside. Will be combined. Further, since the concave groove 423 is also formed in the portion of the protrusion 422, the opening of the mouth portion TKK is not blocked by the protrusion 422.

  As shown in FIG. 1, the lower end portion of the moving valve body 40 slightly enters the valve main body 31 in a state where the syringe TK is not attached, and thereby the moving valve body 40 is urged upward in the axial direction. It becomes a state. Due to this urging force, the inner valve member 42 receives a force that pushes upward more than the outer valve member 41, and the outer peripheral surface 421 of the inner valve member 42 is pressed against the inner peripheral surface 411 of the outer valve member 41. Are closely sealed.

  At the same time, the outer valve member 41 receives a force that pushes it upward, so that the outer peripheral surface 414 of the outer valve member 41 is pressed against the inner peripheral surface 521 of the sleeve portion 52, and they are in close contact with each other.

  Therefore, in a state where the injector TK is not attached, both the outer valve member 41 and the inner valve member 42 are centered almost accurately with respect to the sleeve portion 52. On the contrary, when the syringe TK is attached, a gap is formed between each of the sleeve portion 52, the outer valve member 41, and the inner valve member 42, whereby the engagement portion piece 522 of the syringe TK is connected to the gap. It is possible to absorb the influence caused by eccentricity or misalignment during screwing.

  In FIG. 1, it seems that the lower end portion of the outer valve member 41 is in contact with the upper surface of the valve main body 31, but actually, the lower end portion of the outer valve member 41 enters the inside of the valve main body 31, thereby causing an internal flow path. All of BN is sealed. However, the lower end portion of the outer valve member 41 may be in contact with the upper surface of the valve body 31 or in a state separated from the upper surface as necessary.

  Further, the outer peripheral surface 414 of the outer valve member 41 and the inner peripheral surface 521 of the sleeve portion 52 are conical surfaces, but these are cylindrical surfaces, and are provided with protrusions on each of them so as to engage with each other in the axial direction. The outer valve member 41 may be prevented from coming off in the axial direction and positioned. In that case, an appropriate gap may be provided between the outer peripheral surface of the outer valve member 41 and the inner peripheral surface of the sleeve portion 52. Moreover, you may provide a sealing member as needed.

  As shown in FIG. 7, the locking protrusion 511 of the cap member 50 is formed in a state where the annular body provided on the inner peripheral surface of the cap body 51 is cut out at two locations. That is, two locking projections 511 are provided. Two holding projections 332 and stoppers 333 provided on the outer peripheral surface of the branch pipe base 33 are also provided at two angular positions 180 degrees in the circumferential direction, and the end portions of the two locking projections 511 are two holding projections. 332 and the stopper 333 are engaged. In addition, two notches 512 are provided at the lower end edge of the cap body 51.

  The cap member 50 is slidable on the outer peripheral surface of the branch pipe base 33, but the holding protrusion 331 provided on the outer peripheral surface of the branch pipe base 33 is provided with a locking protrusion 511 provided on the inner peripheral surface of the cap body 51. To prevent axial removal. When the cap member 50 is attached to the branch pipe base 33, the cap members 50 are fitted over each other due to their elastic deformation.

  By rotating and moving the cap member 50 in the axial direction, the standby position P2 and the flow position P1 can be switched.

  That is, as shown in FIGS. 8A and 9A, when the locking projection 511 is between the holding projections 331 and 332, it is the standby position P2 in the state shown in FIG. It is locked with. The cap member 50 is rotated counterclockwise so that the locking projection 511 is separated from the holding projection 332 as shown in FIG. 9 (B), and pushed in that state to hold the locking projection 511 as shown in FIG. 9 (C). 8B and FIG. 9D, the locking projection 511 engages with the lower surface of the holding projection 332, and as shown in FIG. It becomes the distribution position P1 in the state shown, and is locked in this state. In order to switch from the circulation position P1 to the standby position P2, an operation reverse to the above may be performed.

  The outer valve member 41, the inner valve member 42, the cap member 50, and the like are also formed of a synthetic resin material such as polypropylene.

  Next, a method for using the mixed injection tube 1 will be described.

  First, the tube body 11 of the mixed injection tube 1 is connected in the middle of the blood transfusion channel, for example. The cap member 50 is set at the standby position P2. In this state, the branch flow path BR is closed by the valve body 31, and blood or the like does not flow out to the outside. In order to collect blood and inject chemicals, the syringe TK is attached to the attachment part TB. Then, the state shown in FIG. 2 is obtained. Even in this state, the internal flow path BN is not connected to the main flow path SR, and blood or the like does not flow out to the outside.

  Therefore, by switching the cap member 50 to the flow position P1, the state shown in FIG. 3 is obtained, the internal flow path BN is connected to the main flow path SR, and blood flows into the branch flow path BR. In this state, blood collection with a syringe TK and injection of a chemical solution are performed. When the first blood collection is completed, the cap member 50 is switched to the standby position P2 while the syringe TK is attached to the attachment portion TB. As a result, the internal channel BN is again blocked from the main channel SR. When blood sampling is performed for the second time and thereafter, the cap member 50 is switched to the flow position P1 again and necessary operations are performed. When blood sampling is completed for all times, the syringe TK is removed from the attachment portion TB while being switched to the standby position P2.

  In this way, by switching between the standby position P2 and the flow position P1, blood can be collected any number of times with the syringe TK attached. In the meantime, since the syringe TK is not removed, the operation is extremely simple, and there is no problem of hygiene due to blood adhering to the surface of the member as in the prior art. In addition, since blood can be collected any number of times using one mixed injection tube 1, the number of mixed injection tubes 1 used is greatly reduced, and the cost for discarding used mixed injection tubes, including the cost thereof, etc. Can be greatly reduced.

  Further, even when the syringe TK is once removed from the attachment portion TB, the end of the moving valve body 40 protrudes from the sleeve portion 52 of the cap member 50, so that even when blood adheres, the wiping can be easily performed. Wiping or cleaning with alcohol can be performed. Therefore, even in that case, it can be used again, which is extremely advantageous in terms of cost.

  In the embodiment described above, the branch pipe base portion 33 is provided integrally with the pipe body 11, but these may be formed separately to form a suitable fitting structure. Although the inner peripheral surface 413 of the concave portion 412 of the outer valve member 41 is formed in a conical surface for sealing, the sealing performance can be improved by forming the peripheral wall portion of the concave portion 412 with a soft material. Further, instead of or together with the seal by the inner peripheral surface 413, another appropriate seal member such as an O-ring may be provided.

  In the above-described embodiment, the mixed injection pipe 1 including the pipe main body 11 and the branch pipe portion 12 has been described as an example. However, the pipe main body 11 is not provided, and a branch is made to an appropriate fluid container or pipe opening. It is also possible to configure as a valve device for pulling out the branch flow path connected to the fluid container or the pipe line by attaching the pipe part 12. In that case, for example, a male screw such as a taper screw or a parallel screw is formed on the outer peripheral surface of the branch pipe base portion 33, and the male screw is screwed into a female screw provided in the opening of the fluid container or the conduit. Can be combined.

  In the embodiment described above, the locking syringe TK is attached to the attachment portion TB without a needle. The standard for such a syringe TK is defined in ISO594-2: 1998 (E). Therefore, as the structure of the attachment portion TB, various structures capable of attaching such a syringe TK other than those described above can be adopted. Further, in addition to the syringe TK having such a standard, various other syringes TK, or various instruments or piping members other than the syringe TK are attached to the mounting portion TB, and blood collection, infusion, injection of medicinal solution, measurement, or the like is performed. It is possible.

  Various shapes other than those described above can be adopted as the shape, size, material, hardness, shape, size, etc. of the slit-shaped portion 32 of the valve body 31 of the embodiment described above.

  For example, like the valve main body 31B shown in FIG. 11, the shape of the truncated cone-shaped projecting portion 313B below the trunk portion 311B may be reduced. Moreover, the shape which provided the recess 314C in the lower part of the trunk | drum 311C may be sufficient like the valve main body 31C shown in FIG. Further, appropriate chamfering or rounding may be formed at the edge of each member.

  Each member constituting the co-injection tube 1 can be manufactured by injection molding, other mold molding, cutting, or the like.

  In addition, the structure, shape, dimensions, number, material, built-in configuration, and the like of the entire tube body 11, the branch tube portion 12, and the mixed injection tube 1 or each portion can be appropriately changed in accordance with the spirit of the present invention.

It is a section front view of the mixed injection pipe of an embodiment concerning the present invention. It is a cross-sectional front view which shows the state of the standby position of a mixed injection pipe. It is a cross-sectional front view which shows the state of the distribution position of a mixed injection pipe. It is sectional drawing which expands and shows a part of FIG. It is a top view which shows a moving valve body seeing from the top. It is a partial cross section top view seen from the upper part of a cap member. It is a section front view of a cap member. It is an expanded sectional view showing the state of a standby position and a distribution position of a cap member. It is a side view which shows the switching state of the standby position and distribution | circulation position of a cap member. It is a figure which shows the shape of a valve main body. It is sectional drawing which shows the other example of a valve main body. It is sectional drawing which shows the other example of a valve main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mixed injection pipe 11 Pipe main body 12 Branch pipe part 31 Valve main body 32 Slit-like part 33 Branch pipe base part 331, 332 Holding protrusion 333 Stopper 40 Moving valve body 41 Outer valve member 412 Recess 413 Inner peripheral surface 42 Inner valve member 422 Protrusion 423 Recess Groove 50 Cap member 51 Cap body 52 Sleeve portion 522 Engagement piece BK Valve mechanism TB Mounting portion SR Main flow path BR Branch flow path BN Internal flow path TK Syringe

Claims (15)

A mixed injection pipe provided with a branch pipe portion for forming a branch flow path branched from the main flow path on the tube wall of the pipe body forming the main flow path,
The branch pipe part is
A valve mechanism having a valve body for opening and closing the branch flow path;
An attachment portion for attaching a locking syringe or the like to connect to the branch flow path,
The attachment portion is movable with respect to the valve body between a flow position and a standby position,
The valve mechanism is
In a state where the syringe or the like is attached to the attachment portion, the attachment portion is configured to open when the attachment portion is set as the distribution position, and is closed when the attachment portion is set to the standby position.
A mixed injection tube characterized by that. The valve body is made of a rubber material, and is provided with a slit-like portion that penetrates the front and back and closes tightly by elastic force at the center thereof,
The valve mechanism has a moving valve body that moves along with the movement of the mounting portion and can be inserted into the slit-like portion of the valve body and has an internal flow path that is a part of the branch flow path. ,
The moving valve body penetrates the slit-shaped portion at the flow position and the internal flow path is exposed to the main flow path, and the internal flow path is closed within the slit-shaped portion at the standby position.
The mixed injection tube according to claim 1. The moving valve body is
A tubular outer valve member;
An inner valve member arranged concentrically inside the outer valve member and movable relative to the outer valve member in the axial direction;
The mixed injection tube according to claim 2, comprising: The outer valve member has an inner peripheral surface formed in a conical shape,
The inner valve member has an outer peripheral surface that can be in close contact with the inner peripheral surface of the outer valve member,
When the inner valve member and the outer valve member move relative to each other in the axial direction, the internal flow path is formed between them.
The mixed injection tube according to claim 3. The inner valve member is provided to protrude outward in the axial direction with respect to the outer valve member,
When a syringe or the like is attached to the attachment portion, the tip of the mouth of the syringe or the like abuts against the protruding end of the inner valve member and pushes so that the inner valve member and the outer valve member move relative to each other in the axial direction. The internal flow path is formed,
The mixed injection tube according to claim 4. The outer end of the outer valve member is provided with a recess into which the tip of the mouth of a syringe or the like is fitted,
The concave portion has an inner peripheral surface formed in a conical surface shape extending outward,
Sealing is performed by the outer peripheral edge of the tip of the mouth of a syringe or the like contacting the inner peripheral surface of the recess,
The mixed injection tube according to any one of claims 3 to 5. The outer end of the inner valve member is provided with a circular cross-sectional projection having an outer diameter smaller than the inner diameter of the mouth of a syringe or the like at the center, and a recess connected to the outer peripheral surface of the inner valve member. A groove is formed,
The mixed injection tube according to any one of claims 3 to 6. The valve body is disposed in a substantially cylindrical branch pipe base provided in the pipe body,
On the outer peripheral surface of the branch pipe base, a cap member that is fitted on the outer peripheral surface and slidable in the axial direction is provided,
The cap member has a sleeve portion having an inner peripheral surface that surrounds and supports the outer peripheral surface of the outer valve member;
On the outer peripheral surface of the sleeve portion, an engagement piece that engages with a female screw of a locking collar such as the syringe is provided.
The mixed injection tube according to any one of claims 3 to 7. The outer end portion of the outer valve member is provided to protrude outward in the axial direction with respect to the sleeve portion,
When the female screw of a syringe or the like is engaged with the engaging piece, the tip of the mouth of the syringe or the like is pressed against the end of the outer valve member and the protruding end of the inner valve member. , Push them into the sleeve part,
The mixed injection tube according to claim 8. The inner peripheral surface of the sleeve portion is formed in a conical surface shape,
The outer peripheral surface of the outer valve member is formed in a conical surface that can be in close contact with the inner peripheral surface of the sleeve portion,
The inner valve member and the outer valve member are urged to move outward in the axial direction by the elastic force of the valve main body, and thereby the outer valve member is attached to the mounting portion in a state where a syringe or the like is not attached to the mounting portion. The outer peripheral surface of the valve member is tightly sealed with the inner peripheral surface of the sleeve portion, and the outer peripheral surface of the inner valve member is tightly sealed with the inner peripheral surface of the outer valve member,
The mixed injection tube according to claim 9. A locking projection that protrudes inward in the radial direction from the inner peripheral surface is provided at a position of the inner peripheral surface of the cap member that is fitted on the outer peripheral surface of the branch pipe base.
On the outer peripheral surface of the branch pipe base, a holding projection for holding the cap member at the flow position and the standby position by contacting the locking projection is provided.
The mixed injection tube according to any one of claims 8 to 10. A stopper is provided on the outer peripheral surface of the branch pipe base to restrict the rotational angle in the circumferential direction of the cap member in contact with the locking protrusion.
The mixed injection tube according to claim 11. A mixed injection pipe provided with a branch pipe portion for forming a branch flow path branched from the main flow path on the tube wall of the pipe body forming the main flow path,
The branch pipe part is
A valve mechanism for opening and closing the branch flow path;
An attachment part for attaching a locking syringe or the like to connect to the branch flow path and movable between a flow position and a standby position;
The valve mechanism is made of a rubber material, and has a valve body provided with a slit-like portion that penetrates the front and back at the center and closes closely by elastic force;
A cylindrical outer valve member and an inner valve member disposed concentrically on the inner side of the outer valve member and movable relative to the outer valve member in the axial direction; A movable valve body that can be inserted into the slit-like portion of the valve body and has an internal flow path that is a part of the branch flow path;
The moving valve body penetrates the slit-like portion at the flow position, exposes the internal flow path to the main flow path to open the branch flow path, and the internal flow path is inside the slit-shaped portion at the standby position. Closed at the branch flow path,
A mixed injection tube characterized by that. A valve device for pulling out a branch flow path that is attached to an opening of a fluid container or a conduit and connects to the fluid container or the conduit,
A valve mechanism having a valve body for opening and closing the branch flow path;
An attachment portion for attaching a locking syringe or the like to connect to the branch flow path,
The attachment portion is movable with respect to the valve body between a flow position and a standby position,
The valve mechanism is
In a state where the syringe or the like is attached to the attachment portion, the attachment portion is configured to open when the attachment portion is set as the distribution position, and is closed when the attachment portion is set to the standby position.
A valve device characterized by that. The valve body is made of a rubber material, and is provided with a slit-like portion that penetrates the front and back and closes tightly by elastic force at the center thereof,
The valve mechanism has a moving valve body that moves along with the movement of the mounting portion and can be inserted into the slit-like portion of the valve body and has an internal flow path that is a part of the branch flow path. ,
The moving valve body penetrates the slit-shaped portion at the flow position and the internal flow path is exposed to the main flow path, and the internal flow path is closed within the slit-shaped portion at the standby position.
The valve device according to claim 14.