JP6184286B2 - Shunt cap - Google Patents

Description

  The present invention relates to a shunt cap.

  Conventionally, a shunt cap described in Patent Document 1 below is known as a technology in such a field. The shunt cap is made of a plastic material, and includes a cylindrical main body portion, a plug body portion attached to the tip of the main body portion, and a connecting portion that connects the main body portion and the plug body portion. The body part and the connecting part are formed integrally.

JP 2010-279494 A

  In this type of shunt cap, when the plug body is attached to the tip of the main body, excessive stress may be generated in a part of the connecting part that is forcibly bent. Material whitening may occur.

  An object of this invention is to provide the shunt cap which can suppress the whitening of the connection part which connects a main-body part and a plug part.

  The shunt cap of the present invention is a shunt cap that is attached to the terminal end portion of the tube, the base end of which is connected to the terminal end portion, and a tubular main body portion that communicates with the tube, and a cylindrical shape that surrounds the distal end of the main body portion. A plug body part attached to the tip, and a connecting part for connecting the outer side surface of the main body part and the outer side surface of the cylindrical part, the plug body part being removed from the tip, In a state where the tube axis and the cylindrical axis of the cylindrical portion are arranged in parallel, the connecting portion includes a main body portion side portion extending obliquely from the outer surface of the main body portion toward the distal end side, and a plug portion. It is located between the plug body side portion that is inclined and extended from the outer surface of the cylindrical portion to the distal end side, and is curved between the main body portion side portion and the plug body portion side portion, with the base end side convex. An intermediate curved portion.

  In the shunt cap, since the connecting portion has the above-described shape, bending stress generated in the connecting portion that is bent and deformed is easily dispersed when the plug body portion is attached to the tip of the main body portion. Therefore, it is avoided that bending stress concentrates on one part of a connection part, and whitening of a connection part can be suppressed.

  The connecting portion is located between the main body portion side portion and the intermediate curved portion, and has a first curved portion that protrudes at the base end side and curves with a smaller radius of curvature than the intermediate curved portion, and the plug body portion side portion. It is good also as having a 2nd curved part which is located between a middle curved part and is curved with a curvature radius smaller than an intermediate curved part, making the base end side convex. Such a configuration also contributes to the dispersion of bending stress generated in the connecting portion.

  Moreover, a connection part is good also as having a 3rd curved part which is located between a main-body-part side part and a 1st curved part, and curves by making the front end side convex. Such a configuration also contributes to the dispersion of bending stress generated in the connecting portion.

  Moreover, a connection part is good also as having a 4th curved part which is located between a plug body part side part and a 2nd curved part, and curves by making the front end side convex. Such a configuration also contributes to the dispersion of bending stress generated in the connecting portion.

  Further, the extending direction of the main body side portion is inclined by 40 to 60 ° with respect to the tube axis direction of the main body portion, and the extending direction of the plug body side portion is relative to the tube axis direction of the main body portion. It is good also as inclining 40-60 degrees. According to this structure, said effect is show | played effectively.

  Further, the cylindrical portion may include an insertion port into which the distal end is inserted, and the insertion port of the cylindrical portion may be open to the distal end side in a state where the plug body portion is removed from the distal end.

  Further, the inner side surface of the cylindrical portion and the outer side surface of the distal end may be formed with an uneven fitting portion that engages with each other and restricts the rotation of the plug portion around the tube axis. According to this configuration, since the rotation of the plug body portion around the tube axis is restricted by the concave and convex fitting portion, the connecting portion can be prevented from being twisted. As a result, generation of torsional stress in the connecting portion is avoided, and the whitening suppression effect is improved.

  The shunt cap of the present invention further includes a clamping member provided on the outer surface of the main body portion and facing the outer surface, and the clamping member is opened / closed to be pushed toward the main body portion when the clamping member is opened / closed. The opening / closing operation part may be located on the distal end side of the base end in the tube axis direction of the main body part. According to this configuration, the user's finger is not easily brought into contact with the proximal end or the terminal end of the tube during the opening / closing operation of the clamping member, and the cleanliness of the terminal end can be maintained. The opening / closing operation unit may have a pressing surface orthogonal to the pressing direction during the opening / closing operation.

  Further, the clamping member may have an insertion guide surface that is inclined so as to face the distal end side with respect to the insertion direction of the clamping object and guides the clamping object. According to this configuration, the object to be sandwiched is smoothly inserted into the sandwiching member while being guided by the insertion guide surface.

  Further, the main body portion, the plug body portion, and the connecting portion may be integrally formed.

  The shunt cap of the present invention is a shunt cap attached to the end portion of the tube, and has a base end connected to the end portion of the tube and surrounds a tubular main body portion communicating with the tube and a distal end of the main body portion. A plug portion that has a cylindrical portion and is attached to the distal end; and a coupling portion that couples the outer surface of the main body portion and the outer surface of the cylindrical portion; A main body portion side portion extending obliquely toward the side, a plug body portion side portion extending obliquely from the outer surface of the tubular portion of the plug portion toward the proximal end, and the main body portion side portion and the plug body portion. An intermediate connection portion that connects the side portion, and the intermediate connection portion is connected to the main body portion side portion and is connected to the plug body portion side portion, and a proximal end portion that is curved with the proximal end side convex. And a tip side portion that curves with the tip side convex.

  ADVANTAGE OF THE INVENTION According to this invention, the shunt cap which can suppress the whitening of the connection part which connects a main-body part and a plug part can be provided.

It is a perspective view which shows an example of the blood purification apparatus to which the shunt cap of this invention is applied. It is a perspective view which shows an example of the blood circuit containing the shunt cap of this invention. It is a perspective view which shows an example of the shunt cap of this invention. It is a front view which shows the shunt cap of FIG. It is a side view which shows the shunt cap of FIG. It is a front view which expands and shows the connection part of the shunt cap of FIG. It is a front view which shows the 2nd state of the shunt cap of FIG. It is a front view which shows the use condition of the shunt cap of FIG.

  Hereinafter, embodiments of a shunt cap according to the present invention will be described in detail with reference to the drawings. First, a blood purification apparatus to which the shunt cap of this embodiment is applied will be described with reference to FIGS. 1 and 2.

  The blood purification apparatus 1 employs a two-sided system that can handle various treatment modes. A blood system panel circuit is attached to the circuit attachment portion 11 on the front side, and the right side that appears when the right door 12 is opened. A liquid panel circuit is mounted on the circuit mounting portion (not shown). For example, in the apheresis mode, which is a technique for removing a pathogenic substance from the blood by extracorporeal circulation, a blood system panel circuit is mounted on the front circuit mounting portion 11 and a plasma system panel circuit is mounted on the right side circuit mounting portion. Installed. In the ascites mode, the filtration-type panel circuit is mounted on the front side, and the concentration-type panel circuit is mounted on the right side.

  Hereinafter, with reference to FIG. 2, a blood panel circuit 2 used in continuous slow blood filtration therapy (CRRT) will be described as an example of a liquid circuit (for example, a dialysis circuit). CRRT is a long and gentle fluid adjustment therapy for the treatment of acute renal failure. In CRRT, it is necessary to construct a circulation circuit that circulates after purifying blood with a blood filter and appropriately adding a replacement fluid to the treated blood.

  The blood panel circuit (hereinafter referred to as “blood circuit”) 2 has an upstream line (hereinafter referred to as “arterial line”) 21 that feeds blood into the blood filter and blood purified by the blood filter flows. And a downstream line (hereinafter referred to as a “venous line”) 22.

  The arterial line 21 and the venous line 22 are basically composed of a tube 2a made of vinyl chloride, and the arterial line 21 and the venous line 22 are integrated by an inverted L-shaped panel 2b. In the arterial line 21, air-free pressure chambers (hereinafter referred to as “pressure chambers”) 3 are arranged at two positions sandwiching a blood pump tube 24 installed in the blood pump 13 (see FIG. 1). . One pressure chamber 3 is connected to the tube 2a on the blood removal side, and the other pressure chamber 3 is connected to the tube 2a on the inlet side which is the blood filter side.

  As shown in FIG. 1, a blood filter holder 14, a blood pump 13, and the like are attached to a circuit mounting portion 11 on the front side of the blood purification apparatus 1. The circuit mounting portion 11 is provided with a chamber mounting portion 15 to which the pressure chamber 3 of the blood circuit 2 is mounted. The pressure receiving port 16 of the chamber mounting portion 15 communicates with a pressure sensor (not shown) that detects the internal pressure of the blood circuit 2.

  Since the terminal part 2c of the tube 2a is a part finally connected to the shunt part, it is necessary to maintain cleanliness. Therefore, for example, a shunt cap 30 is attached to each end portion 2c so that an operator or the like does not easily come into contact with the end portion 2c during preparation work for treatment. Specifically, as shown in FIG. 2, the male connector 2e provided at the terminal end 2c of the tube 2a of the arterial line 21 and the venous line 22 is inserted into the main body 31 of the shunt cap 30, and the male connector 2e. The shunt caps 30 are attached to each other by screwing the base lock side male screw portion 31f of the shunt cap 30 with the spin lock 2d that surrounds them.

  Next, the configuration of the shunt cap 30 will be described in more detail with reference to FIGS.

  The shunt cap 30 is made of, for example, a resin material such as polypropylene, and is formed by, for example, injection molding. The shunt cap 30 has a tubular main body portion 31 having a hollow portion communicating with the tube 2 a, a plug body portion 33 attached to the tip 31 a of the main body portion 31, and a connection that connects the main body portion 31 and the plug body portion 33. Part 35. The main body part 31, the plug part 33, and the connecting part 35 are integrally formed by injection molding or the like as described above. Since the connecting portion 35 has a certain degree of rigidity, the shape of the shunt cap 30 shown in FIGS. 3 to 6 and the like is maintained independently, but the connecting portion 35 can be easily bent by a human hand.

  Here, FIGS. 3 to 6 show the shunt cap 30 in a state in which the plug body 33 is removed from the main body 31. The shunt cap 30 immediately after molding by injection molding or the like is also in the state shown in FIGS. On the other hand, FIGS. 7 and 8 show a state in which the plug part 33 is attached to the main body part 31. Hereinafter, when distinguishing both, the state of FIGS. 3-6 is called a 1st state, and the state of FIG.7 and FIG.8 is called a 2nd state.

  In addition, in the following, in the case where words having the front and rear concepts such as “front” and “rear” are used in the description, the extending direction of the tube axis A1 of the main body 31 is the front and rear direction, and the front end of the main body 31 The 31a side is “front” and the base end 31b side is “rear”. Moreover, when using the wording with an up-and-down concept for description, it shall respond | correspond to the upper and lower sides of the shunt cap 30 of the state shown in FIG.

  A male thread 31f is formed at the base end 31b of the main body 31, and the male thread 31f is screwed into the spin lock 2d (FIG. 2) so that the base 31b of the main body 31 is connected to the tube 2a. Connected to the terminal end 2c. Further, a male thread 31f is also formed at the tip 31a of the main body 31, and the tip 31a of the main body 31 can be screwed into the spin lock 2d. According to this configuration, for example, either the shunt cap 30 on the arterial line 21 side or the venous line 22 side is removed from the terminal end 2c of the tube 2a, and the other shunt is connected to the spin lock 2d provided on the terminal end 2c. By screwing the tip 31a of the cap 30, the arterial line 21 and the venous line 22 can be short-circuited. Such a short circuit may be necessary in the priming process of the blood circuit 2.

  Moreover, since the front-end | tip 31a of the main-body part 31 contacts the termination | terminus part 2c of the tube 2a in the case of said short circuit, it is necessary to maintain the cleanliness of the front-end | tip 31a of the main-body part 31. FIG. Therefore, for example, during the preparatory work for treatment, the plug portion 33 is attached to the distal end 31a as the second state so that an operator or the like does not easily come into contact with the distal end 31a of the main body 31 (see FIG. 7).

  Specifically, in the second state, the plug body 33 is fitted into the tip 31a of the main body 31 as shown in FIG. The plug part 33 has a cylindrical tubular part 33h surrounding the tip 31a, and the tubular part 33h has an insertion port 33k into which the tip 31a is inserted. The connecting portion 35 connects the outer surface 31s of the main body 31 and the outer surface 33s of the cylindrical portion 33h.

  On the inner side surface of the cylindrical portion 33h, projecting ridge portions 33j that protrude inward in the radial direction and extend in the front-rear direction are formed at two locations, upper and lower. In a position corresponding to the protruding line portion 33j, the male screw portion 31f formed on the outer surface of the main body portion 31 is formed with notches 31j in two circumferential directions in the circumferential direction. With this configuration, in the second state, the ridge 33j fits into the notch 31j, and the relative rotation around the tube axis A1 between the plug body 33 and the main body 31 is restricted. In this manner, the protruding line portion 33j and the male screw portion 31f constitute an uneven fitting portion that engages with each other.

  As shown in FIGS. 3 to 6, in the first state such as immediately after the shunt cap 30 is molded, the tube axis A1 of the main body 31 and the cylinder axis A3 of the cylindrical portion 33h are parallel to each other. In the first state, the connecting portion 35 exists along a plane including the tube axis A1 and the cylinder axis A3. Moreover, in the 1st state, the insertion port 33k of the plug part 33 is opened ahead.

  Next, the shape of the connecting portion 35 in the first state will be described with reference to FIG.

  FIG. 6 is a front view showing the connecting portion 35 viewed from a direction orthogonal to a plane including the tube axis A1 and the cylinder axis A3. The connecting portion 35 in the first state has seven portions separated by a one-dot chain line in FIG. 6 and has a vertically symmetrical shape. The connecting portion 35 is inclined obliquely forward from the outer surface 33 s of the cylindrical portion 33 h of the plug body 33 and the main body side portion 41 that is inclined obliquely forward from the outer surface 31 s of the main body portion 31. And a plug body side portion 43 extending linearly.

  The extending direction A41 of the main body portion side portion 41 is inclined by 40 to 60 ° with respect to the tube axis direction of the main body portion 31 (A1 'in the drawing). That is, the angle α formed by the extending direction A41 of the main body side portion 41 and the tube axis direction A1 ′ is 40 to 60 °. The extending direction A43 of the plug body side portion 43 is inclined by 40 to 60 ° with respect to the tube axis direction A1 'of the main body 31. That is, the angle β formed by the extending direction A43 of the plug body side portion 43 and the tube axis direction A1 'is 40 to 60 °.

  Further, the connecting portion 35 includes an intermediate curved portion 45 that is located between the main body portion side portion 41 and the plug body portion side portion 43 and curves with the rear side convex. The intermediate curved portion 45 is disposed at an intermediate position between the outer surface 31s and the outer surface 33s.

  Further, the connecting portion 35 has a first curved portion 51 which is located between the main body portion side portion 41 and the intermediate curved portion 45 and is curved with the rear side convex. Moreover, it has the 2nd curved part 52 which is located between the plug part side part 43 and the intermediate | middle curved part 45, and curves with the back side convex. The curvature radius of the curvature of the first curved portion 51 and the second curved portion 52 is smaller than the curvature radius of the intermediate curved portion 45.

  Further, the connecting portion 35 has a third curved portion 53 that is located between the main body portion side portion 41 and the first curved portion 51 and curves with the front side convex. Moreover, the connection part 35 has the 4th curved part 54 which is located between the plug part side part 43 and the 2nd curved part 52, and curves with the front side convex. As described above, the connecting portion 35 includes the five curved portions 45, 51, 52, 53, and 54.

  Next, the shape of the connecting portion 35 in the second state will be described with reference to FIG.

  In order to shift from the first state to the second state, the plug part 33 is rotated 180 ° in a plane including the tube axis A1 and the cylinder axis A3, and the plug part 33 is fitted to the tip 31a of the main body part 31. Include. At this time, the connecting portion 35 is bent and deformed in the plane, and a residual stress exists in each portion of the connecting portion 35. Even in the second state, the connecting portion 35 exists along a plane including the tube axis A1 and the cylinder axis A3.

  The deformed connecting portion 35 in the second state includes a main body portion side portion 41 extending obliquely forward from the outer surface 31 s of the main body portion 31 and an outer surface 33 s of the tubular portion 33 h of the plug body portion 33. It has a plug portion side portion 43 that is inclined and extends rearward. The connecting portion 35 has an intermediate connecting portion 60 that connects the main body portion side portion 41 and the plug body portion side portion 43. The intermediate connection portion 60 is connected to the main body portion side portion 41 and is bent at the rear end side, and is bent at the proximal end portion 61 and the distal end portion portion 62 that extends from the plug body portion side portion 43 and is bent at the tip end side. And. As described above, the connecting portion 35 in the second state has the above-described four portions separated by the one-dot chain line in FIG. 7 and has a symmetric shape.

  Subsequently, a clip structure for fixing the shunt cap 30 will be described.

  As shown in FIGS. 3, 7, and 8, the shunt cap 30 is provided on the upper surface side of the outer surface 31 s of the main body 31, and includes a clamping member 71 that faces the outer surface 31 s. In addition, on the outer surface 31 s of the main body portion 31, a fixed clamping portion 72 is formed on the upper surface side so as to face the clamping member 71 and extend in the cylinder axis direction. A predetermined object to be clamped can be sandwiched between the clamping member 71 and the fixed clamping part 72. In other words, the clamping member 71 and the fixed clamping unit 72 constitute a clip structure for fixing the shunt cap 30 to the object by clamping the fixed predetermined object.

  The clamping member 71 has an opening / closing operation part 71 a that is pushed down toward the main body 31, and the user presses the opening / closing operation part 71 a toward the main body 31, thereby elastically holding the clamping member 71. The front end of the clamping member 71 and the fixed clamping part 72 can be opened and closed by being deformed. Then, the object to be sandwiched can be sandwiched between the front portion of the sandwiching member 71 and the fixed sandwiching portion 72. In order to facilitate such a pressing operation of the opening / closing operation unit 71a, the opening / closing operation unit 71a has a pressing surface 71b orthogonal to the pressing direction. A support surface 73 is provided on the lower surface side of the outer surface 31 s of the main body 31 below the pressing surface 71 b. The user can perform an opening / closing operation of the holding member 71 by an operation of holding the pressing surface 71b and the support surface 73 with a finger.

  The pressing surface 71b and the support surface 73 as described above are located in front of the base end 31b. With this configuration, when the shunt cap 30 is attached to the tube 2a, the pressing surface 71b and the support surface 73 are positioned in front of the terminal portion 2c (FIG. 2) of the tube 2a. Therefore, when performing the opening / closing operation of the clamping member 71 from this state, it is difficult for the user's finger to easily come into contact with the base end 31b or the end portion 2c of the tube 2a, and the cleanliness of the end portion 2c can be maintained. Further, the user's finger only touches the pressing surface 71 b and the support surface 73, and does not touch the spin lock 2 d that is screwed to the base end 31 b of the shunt cap 30. Therefore, it is possible to prevent the spin lock 2d from being loosened accidentally and the shunt cap 30 from being detached from the tube 2a.

  As shown in FIG. 8, the shunt cap 30 is hooked and fixed to the edge 75 a of the bucket 75 by the clamping member 71. Such fixing of the shunt cap 30 may be necessary, for example, during the priming process of the blood circuit 2 (FIG. 2). That is, during the priming process, the shunt cap 30 is fixed to the bucket 75 as shown in FIG. 8, and the physiological saline discharged from the shunt cap 30 is directly discarded into the bucket 75. A through hole 33p (see FIG. 2) is provided in the front end surface of the plug body 33, and physiological saline or the like in the blood circuit 2 is discharged through the through hole 33p.

  Thus, when the shunt cap 30 is fixed to the bucket 75, the edge 75a of the bucket 75 is inserted between the clamping member 71 and the fixed clamping part 72 from the front. An inclined surface (insertion guide surface) 71e is formed at the front end of the clamping member 71. The inclined surface (insertion guide surface) is inclined obliquely downward and forward with respect to the insertion direction of the edge portion 75a. Therefore, when the shunt cap 30 is fixed to the bucket 75, the edge portion 75a of the bucket 75 is smoothly inserted between the holding member 71 and the fixed holding portion 72 while being guided by the inclined surface 71e. For the same purpose, an inclined surface 72e is also formed at the front end of the fixed clamping portion 72. Therefore, the work of fixing the shunt cap 30 to the bucket 75 during the priming process can be facilitated.

  Then, the effect by the said shunt cap 30 is demonstrated.

  In the first state, the connecting portion 35 of the shunt cap 30 described above has a main body portion side portion 41 extending obliquely forward from the main body portion 31 and a plug body extending obliquely forward from the plug body portion 33. It has a portion side portion 43 and an intermediate curved portion 45 that is located between the main body portion side portion 41 and the plug body portion side portion 43 and curves with the rear side convex. According to such a shape, when shifting to the second state, the bending stress generated in the connecting portion 35 that undergoes bending deformation is easily dispersed. Therefore, it is avoided that bending stress concentrates on one part of the connection part 35, and the whitening of the connection part 35 can be suppressed. Moreover, if the angle α (FIG. 6) is 40 to 60 ° and the angle β (FIG. 6) is 40 to 60 °, the above-described effects can be effectively achieved.

  In addition, the configuration in which the connecting portion 35 includes the first curved portion 51 and the second curved portion 52 having a smaller radius of curvature than the intermediate curved portion 45 as described above also contributes to the dispersion of stress generated in the connecting portion 35. To do. Further, the configuration in which the connecting portion 35 includes the third curved portion 53 between the main body side portion 41 and the first curved portion 51 as described above also contributes to the dispersion of bending stress generated in the connecting portion 35. Further, the configuration in which the connecting portion 35 has the fourth curved portion 54 between the plug portion side portion 43 and the second curved portion 52 as described above also contributes to the dispersion of bending stress generated in the connecting portion 35. .

  Further, when the transition from the first state to the second state is performed, the plug body 33 is rotated by 180 ° in a plane including the tube axis A1 and the cylinder axis A3, and the plug body 33 is moved to the tip 31a of the main body 31. Fit. At this time, the protrusion 33j and the male thread 31f are concavo-convexly fitted and the rotation of the stopper 33 around the tube axis A1 is restricted, so that the connecting portion 35 can be prevented from being twisted. As a result, generation of torsional stress in the connecting portion 35 is avoided, and the whitening suppression effect is improved.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and may be modified without changing the gist described in each claim.

  2a ... tube, 2c ... terminal part, 30 ... shunt cap, 31 ... main body part, 31a ... tip, 31b ... base end, 31f ... male screw part (concave fitting part), 31s ... outer side surface, 33 ... plug body part , 33h ... cylindrical portion, 33k ... insertion port, 33s ... outer surface, 33j ... ridge portion (concave / convex fitting portion), 35 ... coupling portion, 41 ... main body side portion, 43 ... plug body side portion, 45 ... intermediate curved part, 51 ... first curved part, 52 ... second curved part, 53 ... third curved part, 54 ... fourth curved part, 60 ... intermediate connecting part, 61 ... proximal end side part, 62 ... distal end side 71, clamping member, 71a ... opening / closing operation part, 71b ... pressing surface, 71e ... inclined surface (insertion guide surface), 75 ... bucket (clamping object), 75a ... edge of bucket, A1 ... pipe shaft, A3 ... Cylinder shaft.

Claims (11)

A shunt cap attached to the end of the tube,
A tubular main body portion having a proximal end connected to the terminal end portion and communicating with the tube;
A cylindrical part surrounding the tip of the main body, and a plug part attached to the tip;
A connecting portion that connects the outer surface of the main body portion and the outer surface of the cylindrical portion;
In the state where the plug body part is removed from the tip, and the tube axis of the main body part and the cylinder axis of the cylindrical part are arranged in parallel,
The connecting portion is
A main body portion side portion extending obliquely from the outer surface of the main body portion to the distal end side;
A plug part side portion extending obliquely from the outer surface of the tubular part of the plug part to the tip side; and
An intermediate curved portion that is located between the main body portion side portion and the plug body portion side portion and curves with the proximal end convex.
A first curved portion that is located between the main body portion side portion and the intermediate curved portion, is curved with a radius of curvature smaller than the intermediate curved portion, with the proximal end projecting;
A second curved portion that is located between the plug body side portion and the intermediate curved portion and that has a proximal end side convex and is curved with a smaller radius of curvature than the intermediate curved portion. A shunt cap. The connecting portion is
2. The shunt cap according to claim 1 , wherein the shunt cap is located between the main body portion side portion and the first curved portion, and has a third curved portion that curves with the tip side convex. The connecting portion is
Positioned between said plug body side portion second curved portion, the shunt cap according to claim 1 or 2, characterized in that it has a fourth curved portion which is curved to the front end side in a convex. The extending direction of the body portion side portion is inclined by 40 to 60 ° with respect to the tube axis direction of the body portion,
The shunt cap according to any one of claims 1 to 3 , wherein an extending direction of the plug body side portion is inclined by 40 to 60 degrees with respect to a tube axis direction of the main body. . The cylindrical portion includes an insertion port into which the tip is inserted,
The shunt according to any one of claims 1 to 4 , wherein the insertion port of the cylindrical portion is open to the distal end side in a state where the plug body portion is removed from the distal end. cap. A concave-convex fitting portion is formed on the inner side surface of the cylindrical portion and the outer side surface of the distal end to engage with each other and regulate the rotation of the plug body portion around the tube axis. The shunt cap according to any one of claims 1 to 5 . A pinching member provided on the outer surface of the main body and facing the outer surface;
The clamping member has an opening / closing operation part that is pushed toward the main body when the clamping member is opened / closed.
The opening / closing operation unit includes:
The shunt cap according to any one of claims 1 to 6, wherein the shunt cap is located closer to the distal end side than the proximal end in the tube axis direction of the main body portion. The shunt cap according to claim 7 , wherein the opening / closing operation unit has a pressing surface orthogonal to a pressing direction during the opening / closing operation. The clamping member is
The shunt cap according to claim 7 or 8, characterized in that it has an insertion guide surface is inclined so as to face the free end portion with respect to the insertion direction of the clamping object to guide the clamping object. The shunt cap according to any one of claims 1 to 9 , wherein the main body portion, the plug portion, and the connecting portion are integrally formed. A shunt cap attached to the end of the tube,
A tubular main body that is connected to the terminal end of the tube and communicates with the tube;
A cylindrical portion surrounding the tip of the main body, and a plug portion attached to the tip;
A connecting portion that connects the outer surface of the main body portion and the outer surface of the cylindrical portion;
The connecting portion is
A main body portion side portion extending obliquely from the outer surface of the main body portion to the distal end side;
A plug portion side portion extending obliquely from the outer surface of the tubular portion of the plug portion toward the base end side;
An intermediate connection part for connecting the body part side part and the plug part side part,
The intermediate connection portion is
A proximal end portion which is connected to the main body portion side portion and curves with the proximal end side convex; and a distal end side portion which is connected to the plug body side portion and curves with the distal end side convex. A shunt cap characterized by

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