JP5821701B2 - Flow path connection device having a function of preventing erroneous connection, nutrient container and liquid feeding circuit - Google Patents

Description

  The present invention relates to a flow path connection device for connecting first and second flow paths through which a liquid material passes with each other at the flow path ends, and in particular, a pair of connectors coupled to each flow path end. It is related with the flow-path connection apparatus which has a function which prevents a misconnection when they are mutually incompatible. Moreover, it is related with the nutrient solution container and liquid feeding circuit provided with one of such a connector.

  In order to connect two flow paths, generally, a flow path connection device that connects ends of the flow paths to each other is used. For example, in a medical field, a flow path connecting device for connecting two flexible medical tubes to each other is often used. As such an example, in enteral nutrition therapy, a flow path connecting device for connecting a tube, which is a flow path to a patient, and a nutrient container can be mentioned.

  Enteral nutrition therapy is a method in which nutrition and drugs are administered to patients who have difficulty in feeding food from the oral cavity to the stomach. In enteral nutrition therapy, a PEG (Percutaneous Endoscopic Gastrostomy) inserted into a tube that is passed from the patient's nasal cavity to the stomach or duodenum (commonly referred to as a “nasal tube”) or a gastric fistula formed in the abdomen of the patient. A liquid such as a nutrient, liquid food, or drug (generally called “enteral nutrient”) is administered via a catheter.

  An example of a flow path connection device disclosed in Patent Document 1 and used for enteral nutrition therapy via a nasal tube will be described with reference to FIGS. FIG. 12 shows the nutrient container 100 and the male connector 101. In FIG. 13, the male connector 101 and the female connector 102 are shown facing each other in a released state where they are not connected. FIG. 14 is a perspective view of the male connector 101, and FIG. 15 is a perspective view showing a part of the female connector 102.

  As shown in FIG. 12, a cylindrical supply port 100a through which a liquid material flows out is formed at the lower end of the nutrient solution container 100, thereby constituting a flow path end. A male screw is formed on the outer peripheral surface of the supply port 100a.

  As shown in FIG. 13, the male connector 101 includes a tubular portion 103 through which a liquid material flows out and an annular cap portion 104 coupled to the supply port 100 a of the nutrient solution container 100. An internal thread is formed on the inner peripheral surface of the cap portion 104 (not shown), and is coupled to the supply port 100a by screwing. The liquid substance in the nutrient solution container 100 is administered from the supply port 100a to the patient via an enteral nutrition supply set and a nasal tube (not shown). A female connector 102 is connected to one end of a tube constituting the enteral nutrition supply set, and is connected to the male connector 101.

  The female connector 102 includes an adapter 105 that is mounted on the outer peripheral surface of the tubular portion 103 of the male connector 101 and a handle 106 that is externally mounted on the adapter 105. The adapter 105 has a cylindrical portion 107 and an insertion portion 108, and the tubular portion 103 of the male connector 101 is inserted into the insertion portion 108. A flexible liquid feeding tube 109 constituting an enteral nutrition supply set is inserted into the cylindrical portion 107.

  A pedestal 110 is formed on the end surface of the cap portion 104 of the male connector 101, and a pair of engaging claws 111 are provided on the outer peripheral surface thereof. The shape of the engaging claw 111 is clearly shown in FIG. As shown in FIG. 15, the handle 106 is provided with a transition portion 112 to form an arc-shaped wall 113. The arcuate wall 113 is provided with an engagement region 114. The engagement region 114 is composed of an engagement wall 115 and a recess 116.

  When connecting the female connector 102 and the male connector 101, first, the tubular portion 103 of the male connector 101 is inserted deeply into the insertion portion 108 of the adapter 105, as shown in FIG. Furthermore, the handle 106 is pushed into the male connector 101 in the direction of the arrow Y, and the upper surface of the transition portion 112 (see FIG. 15) of the handle 106 is brought into contact with the lower surface of the base 110 of the male connector 101. In this state, the handle 106 is rotated clockwise with respect to the male connector 101. The pair of engaging claws 111 formed on the outer peripheral surface of the pedestal 110 passes through the pair of arcuate walls 113 of the handle 106, reaches the engaging region 114, and is stored in the recess 116. Thereby, the engagement claw 111 and the engagement wall 115 are engaged, and the connection state of the female connector 102 and the male connector 101 is obtained.

WO2008 / 152871

  The connection by the flow path connecting device disclosed in Patent Document 1 is for locking the connection state and the operation of deeply inserting the tubular portion 103 of the male connector 101 into the insertion portion 108 of the adapter 105 of the female connector 102. This is done by operating the handle 106 of the above. In this case, if the outer diameter of the tubular portion 103 of the male connector 101 is smaller than the inner diameter of the insertion portion 108 of the adapter 105, the tubular portion 103 can be easily inserted into the insertion portion 108.

  That is, if the structure is not the same as that of the male connector 101 or the female connector 102 disclosed in Patent Document 1, the connection state cannot be maintained, but the connection for connecting the flow paths is easy. Thereby, the state of incorrect connection is formed and the accident that the enteral nutrient in the nutrient container 100 is accidentally administered to a patient may generate | occur | produce.

  Accordingly, the present invention provides a flow path having a configuration in which a pair of connectors for connecting two flow paths to each other at the flow path ends can effectively avoid erroneous connection with a connector having an incompatible structure. An object is to provide a connection device.

  Moreover, it aims at providing the nutrient solution container provided with such a connector, and a liquid feeding circuit.

  The flow path connecting device of the present invention includes first and second connectors that are respectively coupled to ends of a pair of flow paths, and the first and second connectors are coupled to each other, whereby the pair of flow paths Are configured to communicate with each other.

In order to solve the above-mentioned problem, the first connector is provided integrally with the first flow path end connection portion, which is connected to the end portion of the one flow path, and the first flow path end connection portion. A cylindrical pedestal that protrudes outwardly, a tubular convex portion that protrudes from the center of the tip of the pedestal, and an engaging claw that protrudes outward from a portion of the periphery of the tip of the pedestal. The second connector is formed integrally with the second flow path end connection portion, which is connected to the end of the other flow path, and protrudes toward the distal end side. The first connector Between the inner cylindrical portion that can be inserted into the tubular convex portion, the inner cylindrical portion concentrically with the inner cylindrical portion, coupled to the proximal end side of the inner cylindrical portion, and between the outer peripheral surface of the inner cylindrical portion An outer cylindrical portion that forms an annular recess into which the tubular convex portion can be fitted, and is connected to the outer cylindrical portion, extends toward the distal end side in the tube axis direction, and projects beyond the distal end of the outer cylindrical portion. Ribs at least one of a position retracted from an inner tip of the tubular convex portion of the first connector and an inner tip portion of the inner cylindrical portion of the second connector. Ru is formed. The first connector and the second connector are connected by fitting the tubular convex part into the annular concave part and engaging the engaging claw and the engaging wall.

  According to the flow path connection device of the present invention, the first connector and the second connector can be connected to each other on the condition that the tubular convex portion of the first connector is fitted into the annular concave portion of the second connector. Therefore, only the combination in which the dimensional relationship between the tubular convex portion and the inner cylinder portion and the outer cylinder portion is matched can be connected to each other. The range in which such dimensions and shapes match is extremely narrow, and the probability of erroneous connection can be greatly reduced.

The perspective view which shows the flow-path connection apparatus in one embodiment of this invention. Front view of the flow path connection device Sectional drawing along the AA line in FIG. 2 of the flow-path connection apparatus Sectional drawing which decomposed | disassembled and showed the cross-sectional structure shown in FIG. 3 of the flow-path connection apparatus The perspective view of the 1st connector which comprises the flow-path connection apparatus Front view of the first connector Bottom view of the first connector The perspective view of the 2nd connector which comprises the flow-path connection apparatus Front view of the second connector Plan view of the second connector A perspective view showing other examples of the 2nd connector Sectional drawing of the other example of the 2nd connector The front view which shows the nutrient container which is connected with the male connector which comprises the flow-path connection apparatus of a prior art example, and an enteral-nutrition supply set by it Front view showing the flow channel connecting device in a disconnected state The perspective view which shows the male connector which comprises the flow-path connection apparatus The perspective view which shows the handle | steering-wheel which is a part of female connector which comprises the flow-path connection apparatus.

  The flow path connecting device of the present invention can take the following aspects based on the above configuration.

  In other words, a trident or cross-shaped rib may be provided at the tip of the inner connector of the second connector. Further, a trident, cross or annular rib is provided at a position retracted from the inner tip of the tubular convex portion of the first connector, and the retracted position corresponds to the inner position of the second connector in a connected state. It can be set as the structure which is the position which the front-end | tip of a cylinder part reaches, or its back part. By providing such a rib, it becomes more difficult to connect a connector having an incompatible shape, and the probability of erroneous connection can be further reduced.

  Further, the tubular convex portion of the first connector and the inner cylindrical portion of the second connector are provided with ribs having the same shape of the trident or cross, respectively, and the connection between the first connector and the second connector In a state in which the inner cylinder portion and the tubular convex portion rib are arranged, the arrangement of the inner cylinder portion viewed in the tube axis direction can be configured to match each other. Thereby, the resistance with respect to the flow path by providing the rib is reduced.

  Moreover, it can be set as the structure by which the cyclic | annular rib which forms the level | step difference of the circumferential direction is provided in the internal peripheral surface in the position retreated from the front-end | tip inside the said inner cylinder part of the said 2nd connector. Similar to the three-pronged and cross-shaped ribs, it is possible to improve the difficulty of connecting non-conforming connectors and further reduce the probability of erroneous connection.

  Moreover, it can be set as the structure which the front end surface of the said inner cylinder part of the said 2nd connector and the said outer cylinder part is located on the same surface orthogonal to the tube axis of the said inner cylinder part. This configuration is also effective in avoiding erroneous connection. When one of the front end surfaces protrudes, it becomes easy to fit into an incompatible connector, whereas such a situation occurs when the front end surfaces of the inner cylinder part and the outer cylinder part are flush with each other. Because it is difficult.

  The engaging claw forms a gap with the end surface on the front end side of the first flow path end connecting portion, and the engaging wall extends outward from the outer peripheral surface of the outer cylinder portion. An inward convex portion that protrudes inward from the inner peripheral surface and extends in the circumferential direction is provided on the distal end side of the engagement wall, and is connected to the outer cylinder portion via a portion. By forming a gap between them and allowing the engagement claw and the inward convex portion to enter the gap formed by the other party, the engagement claw and the engagement wall can be engaged with each other. . According to this, the function of preventing erroneous connection by the fitting structure of the tubular convex portion of the first connector with respect to the annular concave portion of the second connector and the engaging function of both connectors can be easily and reliably cooperated, A simple configuration can be realized.

  Further, at least one of a surface of the inward convex portion that faces the distal end surface of the flange portion and a surface of the engaging claw that faces the distal end side end surface of the first flow path end connecting portion is the inner cylindrical portion. It can be set as the structure which inclines along the said circumferential direction with respect to the pipe-axis direction. According to this, when the two connectors are engaged, the engagement claw and the inward convex portion slide on the inclined surfaces to obtain an action in which the two connectors are pressed against each other, and the tubular convex portion of the first connector And the close_contact | adherence degree with the inner cylinder part and outer cylinder part of a 2nd connector improves, and the liquid-tightness of a flow path improves.

  The flow path end of the first flow path is a supply port of the nutrient solution container or an end of a tube extending from the supply port, and the flow path end of the second flow path is a gastric fistula It can be set as the structure which is an edge part of the mounted | worn PEG (Percutaneous Endoscopic Gastrostomy) catheter.

  Moreover, in order to comprise the flow-path connection apparatus of the said structure, as said 1st connector, the 1st flow-path end connection part connected with the edge part of one said flow path, and the said 1st flow-path end connection part A cylindrical pedestal that is provided integrally with the pedestal, protrudes from the center of the tip of the pedestal, and an engaging claw that protrudes outward from a part of the periphery of the tip of the pedestal. The connector provided with can be comprised.

  Moreover, in order to comprise the flow-path connection apparatus of the said structure, as said 2nd connector, the 2nd flow-path end connection part connected with the edge part of the other said flow path, and the said 2nd flow-path end connection part And an inner cylindrical portion that protrudes toward the distal end side and can be inserted into the tubular convex portion of the first connector, and is arranged concentrically with the inner cylindrical portion and is proximal to the inner cylindrical portion And an outer cylindrical portion that forms an annular recess into which the tubular convex portion can be fitted with the outer peripheral surface of the inner cylindrical portion, and is connected to the outer cylindrical portion and faces toward the distal end side in the tube axis direction. A connector including an engaging wall that extends and protrudes beyond the tip of the outer cylinder portion can be configured.

  In addition, a container main body having a hollow cylindrical port that allows liquid to enter and exit, and the first connector having the above-described configuration, the first connector includes the first flow path end connecting portion at the port. A nutrient solution container that is integrated or detachably connected to the port can be configured.

  Moreover, the liquid feeding circuit provided with the 2nd connector of the said structure and the liquid feeding tube connected to the said 2nd flow-path end connection part of the said 2nd connector can be comprised.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment>
1 to 4 show a state in which the first connector 1 and the second connector 2 constituting the flow path connecting device in one embodiment of the present invention are connected to each other. 1 is a perspective view, and FIG. 2 is a front view. 3 is a cross-sectional view taken along line AA in FIG. 4 is an exploded cross-sectional view of the cross-sectional structure shown in FIG. This embodiment is an example applied to enteral nutrition therapy via a PEG catheter.

  The first and second connectors 1 and 2 are respectively connected to channel end portions (not shown) of the first and second channels through which the liquid material passes, and are connected as shown in FIG. The first and second flow paths are communicated with each other. In the present embodiment, the supply port 100a provided at the lower end of the nutrient solution container 100 as shown in FIG. 12 corresponds to the flow path end of the first flow path, and constitutes the enteral nutrition supply set. A tube (not shown) corresponds to the flow path end of the second flow path.

  The first and second connectors 1 and 2 are both made of a material having a relatively high hardness, and the hardness measured based on JIS-K7202 is preferably R40 to R140, and more preferably R50 to R100. . This is because such a material is difficult to be deformed and thus has a great effect of preventing erroneous connection as described later.

  The first connector 1 is provided with a cap portion 3 and constitutes a first flow path end connecting portion connected to the flow path end. On the other hand, the second connector 2 is provided with a tube connecting portion 4 and constitutes a second flow path end connecting portion connected to the flow path end.

  An internal thread (see FIG. 4) is formed on the inner peripheral surface of the cap portion 3, and is coupled to the supply port 100a by screwing. However, the cap part 3 does not have a screwing structure, and the first connector 1 may be integrated with the port of the nutrient container. A liquid feeding tube (not shown) that constitutes an enteral nutrition supply set is connected to the tube connecting portion 4. By connecting the first and second connectors 1 and 2 as shown in the figure, the liquid in the nutrient solution container passes through the first and second connectors 1 and 2 and the enteral nutrition supply set and the PEG catheter ( Administered to the patient through (not shown).

  The second connector 2 has an engagement wall 5 provided around the tube connecting portion 4. The engaging wall 5 is provided with a pair of gripping portions 5 a that face each other in the radial direction of the tube connecting portion 4. When connecting the 2nd connector 2 with respect to the 1st connector 1 connected with the supply port of the nutrient solution container, the holding part 5a can be hold | gripped and it can operate easily.

  As shown in the cross-sectional view of FIG. 4, the first connector 1 has a cylindrical pedestal 6 integrally formed with the cap portion 3 so as to protrude toward the tip side of the cap portion 3 (side facing the second connector 2). The inner cavity 6 a communicates with the inner cavity of the cap portion 3. The structure around the base 6 can be clearly understood from the perspective view of the first connector 1 shown in FIG. A front view of the first connector 1 is shown in FIG. 6, and a bottom view is shown in FIG. The cross section of the first connector 1 shown in FIG. 4 shows the shape along the line BB in FIG.

  An annular tip surface 7 having a central through hole 7 a is formed at the tip of the base 6. A tubular convex portion 8 is provided so as to protrude from the central portion of the annular tip surface 7. The pedestal 6 is further provided with a pair of engaging claws 9 protruding outward from a part of the peripheral edge on the front end side so as to face each other in the radial direction of the pedestal 6. A gap g1 (see FIGS. 4 and 6) is formed between the engaging claw 9 and the end surface 3b of the cap portion 3. Further, as shown in FIG. 6, the surface of the engaging claw 9 that faces the end surface 3 b of the cap portion 3 forms an inclined surface 9 a that is inclined along the circumferential direction with respect to the tube axis direction of the tubular convex portion 8. doing. A cross-shaped rib 10 is provided in the inner part of the tubular convex portion 8. The ribs can take the form of a trident or a larger number of radial ribs. Or a lattice-like rib may be sufficient.

  As shown in the cross-sectional view of FIG. 4, the second connector 2 is formed integrally with the tube connecting portion 4 and protrudes to the distal end side (the side facing the first connector 1), and its inner cavity 11a is connected to the tube. An inner cylinder portion 11 communicating with the portion 4 is provided. The structure of the inner cylinder portion 11 can be clearly understood from the perspective view of FIG. 8 showing the distal end side of the second connector 2. A front view of the second connector 1 is shown in FIG. 9, and a bottom view is shown in FIG. The cross section of the second connector 2 shown in FIG. 4 shows the shape along the line CC in FIG.

  As shown in FIG. 4, the inner cylinder portion 11 has a dimension that can be inserted into the tubular convex portion 8 of the first connector 1. Here, the rib 10 provided on the tubular convex portion 8 of the first connector 1 is arranged so as not to obstruct the insertion of the inner cylindrical portion 11. That is, it is arranged at a position where the tip of the inner cylinder part 11 reaches from the tip of the tubular convex part 8 or a position retreated deeper than that. An outer tube portion 12 is provided concentrically with the inner tube portion 11 and is supported by being coupled to the proximal end side of the inner tube portion 11. An annular concave portion 13 is formed between the inner peripheral surface of the outer cylindrical portion 12 and the outer peripheral surface of the inner cylindrical portion 11, and the tubular convex portion 8 can be fitted into the annular concave portion 13. Further, the front end surfaces of the inner cylinder portion 11 and the outer cylinder portion 12 are located on the same plane orthogonal to the tube axis of the inner cylinder portion 11.

  A flange portion 14 is provided so as to extend outward from the outer peripheral surface of the outer cylinder portion 12. The above-described engagement wall 5 is supported by the outer peripheral edge of the flange portion 14. In the region between the pair of gripping portions 5 a in the engagement wall 5, a pair of projecting portions 15 extending toward the distal end side in the tube axis direction of the outer tube portion 12 and projecting from the outer tube portion 12 are formed. ing. A part of the inner peripheral surface on the distal end side of the protruding portion 15 protrudes inward to form an inward convex portion 16 extending along the circumferential direction. The inward convex portion 16 forms a gap g2 between the distal end surface 14a of the flange portion 14 (see FIG. 8). Further, as shown in FIG. 8, the surface facing the distal end surface 14 a of the flange portion 14 of the inward convex portion 16 has an inclined surface 16 a inclined along the circumferential direction with respect to the tube axis direction of the outer cylindrical portion 12. Forming. A cross-shaped rib 17 is provided inside the inner cylinder portion 11. The ribs can take the form of a trident or a larger number of radial ribs. Or a lattice-like rib may be sufficient. The position of the rib 17 in the tube axis direction may reach the distal end of the inner cylinder portion 11 or may recede from the distal end.

  The operation of connecting the first connector 1 and the second connector 2 having the above configuration to each other is performed as follows. First, as shown in FIG. 4, the tips of the connectors 1 and 2, that is, the tubular convex portion 8 of the first connector 1 and the annular concave portion 13 of the second connector 2 are opposed to each other.

  From this state, the second connector 2 is rotated around the tube axis with respect to the first connector 1 while pressing both the connectors 1 and 2 against each other. A state in which the engaging claw 9 of the first connector 1 is located between the convex portions 16 is obtained. From this state, by pressing the connectors 1 and 2 together, the tubular convex portion 8 of the first connector 1 is fitted into the annular concave portion 13 of the second connector 2, and the inward convex portion 16 and the engaging claw 9 are Approach the tube axis direction.

  Further, by rotating the second connector 2 clockwise around the tube axis with respect to the first connector 1, the engaging claw 9 and the inward convex portion 16 enter the gap formed by the counterpart and are inclined. The surfaces 9a and 16a are slid while contacting each other to reach the innermost portion, and the engagement between the engaging claw 9 and the inward convex portion 16 is completed. At this time, the engaging claw 9 and the inward convex portion 16 slide on the inclined surfaces 9a and 16a to obtain an action in which the connectors 1 and 2 are pressed against each other, and the tubular convex portion of the first connector 1 is obtained. 8 and the inner cylinder part 11 and the outer cylinder part 12 of the 2nd connector 2 improve, and the liquid-tightness of a flow path improves. In addition, even if an inclined surface is provided in any one of an inward convex part or the engagement nail | claw 9, and the other is a flat surface, the equivalent effect can be acquired.

  As described above, according to the flow path connecting device of the present embodiment, the first connector 1 and the annular connector 13 of the second connector 2 are fitted on the annular connector 13 on the condition that the tubular convex portion 8 of the first connector 1 is fitted. The second connectors 2 can be connected to each other. Therefore, only the combination in which the dimensional relationship between the tubular convex part 8 and the inner cylinder part 11 and the outer cylinder part 12 matches can be connected to each other. The range in which such dimensions and shapes match is extremely narrow, and the probability of erroneous connection can be greatly reduced.

  Further, since the cross-shaped (or trifurcated) ribs 17 are provided inside the inner cylindrical portion 11 of the second connector 2, it is further difficult to connect a connector having an incompatible shape, and erroneous connection is caused. Probability can be further reduced. Similarly, the cross-shaped (or trifurcated) rib 10 provided inside the tubular convex portion 8 of the first connector 1 similarly reduces the probability of erroneous connection with the second connector having an incompatible shape. It is effective.

  Even if the rib is provided only on one of the inner cylindrical portion 11 and the tubular convex portion 8, a corresponding effect can be obtained. When provided on both sides, both ribs have the same shape, and the ribs of the inner cylindrical portion 11 and the tubular convex portion 8 are viewed in the tube axis direction with the engaging claw 9 and the inner convex portion 16 engaged. It is desirable that the arrangements are configured to match each other. Thereby, the resistance with respect to the flow path by providing the rib is reduced.

  In addition, the cross-shaped rib 17 of the inner cylinder part 11 of the 2nd connector 2 can be replaced with the cyclic | annular rib 18 as shown to FIG. 11A and 11B. FIG. 11A is a perspective view showing a modified second connector 2a, and FIG. 11B is a cross-sectional view. The annular rib 18 is disposed so as to recede from the tip of the inner cylinder part 11 to the inner part, and forms a step in the circumferential direction on the inner peripheral surface of the inner cylinder part 11. The annular rib 18 prevents the connector tip having an incompatible shape from entering the inside while maintaining a predetermined diameter at the tip portion of the inner cylinder portion 11, thereby improving the effect of preventing erroneous connection. . Similarly, the cross-shaped rib 10 provided inside the tubular convex portion 8 of the first connector 1 can be replaced with an annular rib.

  Moreover, it is effective for avoiding a misconnection that the front end surface of the inner cylinder part 11 and the outer cylinder part 12 is located on the same plane orthogonal to the tube axis of the inner cylinder part 11. When one of the front end surfaces protrudes, it becomes easy to fit into a connector having an incompatible shape, whereas when the front end surfaces of the inner tube portion 11 and the outer tube portion 12 are flush with each other, such a situation occurs. This is because it is difficult to occur.

  In the above configuration, the outer diameter of the inner cylindrical portion 11 is equal to or slightly smaller than the inner diameter of the tubular convex portion 8. Thereby, the outer peripheral surface of the inner cylindrical portion 11 is in close contact with the inner peripheral surface of the tubular convex portion 8 when the second connector 2 and the first connector 1 are connected. Therefore, the first connector 1 and the second connector 2 can be reliably connected without causing leakage of the liquid material. As shown in FIG. 4, when the outer diameter of the inner cylindrical portion 11 is gradually reduced toward the tip, the adhesion between the outer peripheral surface of the inner cylindrical portion 11 and the inner peripheral surface of the tubular convex portion 8 is improved. .

  When the first connector 1 and the second connector 2 are connected, the outer cylindrical portion 12 abuts on the outer peripheral surface of the tubular convex portion 8 so that the tubular convex portion 8 faces the inner cylindrical portion 11 side. It acts to hold down. Thereby, generation | occurrence | production of the leakage of a liquid substance can be suppressed more reliably.

  The flow path connecting device of the present invention has a very narrow range in which the connecting portions of a pair of connectors are compatible with each other, can greatly reduce the probability of erroneous connection, and is particularly useful for medical tube connecting devices and the like. .

DESCRIPTION OF SYMBOLS 1 1st connector 2 2nd connector 3, 104 Cap part 4 Tube connection part 5 Engagement wall 5a Grasping part 6, 110 Base 6a, 11a Lumen 7 Annular tip surface 7a Center part through-hole 8 Tubular convex part 9, 111 Joint claw 9a Inclined surface 10, 17, 18 Rib 11 Inner cylinder part 12 Outer cylinder part 13 Annular recessed part 14 Ridge part 15 Protruding part 16 Inward convex part 16a Inclined surface 100 Nutrient agent container 100a Supply port 101 Male connector 102 Female type Connector 103 Tubular part 105 Adapter 106 Handle 107 Tubular part 108 Insertion part 109 Liquid supply tube 112 Crossing part 113 Arc-shaped wall 114 Engagement area 115 Engagement wall 116 Recess g1, g2 gap

Claims (13)

A flow path connection device comprising first and second connectors respectively connected to the ends of a pair of flow paths, wherein the first and second connectors are coupled to each other so that the pair of flow paths communicate with each other In
The first connector is
A first flow path end coupling portion coupled to one end of the flow path;
A cylindrical pedestal that is provided integrally with the first flow path end coupling portion and protrudes toward the distal end;
A tubular protrusion protruding from the center of the tip of the pedestal;
An engaging claw projecting outward from a part of the peripheral edge of the pedestal,
The second connector is
A second flow path end coupling portion coupled to the other flow path end;
An inner cylindrical portion that is integrally formed with the second flow path end connecting portion and protrudes toward the distal end, and is insertable into the tubular convex portion of the first connector;
An outer cylinder that is arranged concentrically with the inner cylinder part, is coupled to a proximal end side of the inner cylinder part, and forms an annular recess in which the tubular convex part can be fitted between the outer peripheral surface of the inner cylinder part And
An engagement wall connected to the outer cylinder portion, extending toward the distal end side in the tube axis direction and projecting from the distal end of the outer cylinder portion;
A rib is formed on at least one of the position retracted from the inner tip of the tubular convex portion of the first connector and the inner tip of the inner tube portion of the second connector,
The flow path is characterized in that the first connector and the second connector are connected by fitting the tubular convex part into the annular concave part and engaging the engaging claw and the engaging wall. Connected device. Wherein said ribs formed in the interior of the distal end of the inner cylindrical portion of the second connector, a flow path connecting device according to claim 1 trigeminal shape, or a cross shape. The rib formed at a position retracted from the front end of the tubular convex portion of the first connector is a trident, a cross or an annular shape , and the retracted position corresponds to the second connector in the connected state. The flow path connecting device according to claim 1, wherein the flow path connecting device is located at a position where the tip of the inner cylinder portion reaches or at a deeper position. The ribs formed on the tubular convex portion of the first connector and the inner cylindrical portion of the second connector are respectively the same shape of the trident or cross shape , and the first connector and the second connector in a state where connection is completed, and the ribs of the said ribs of the inner cylinder part tubular projections, claims arrangement viewed in the tube axis direction of the inner cylinder part is configured to conform to each other 3. The flow path connecting device according to 3. The rib formed at the tip end inside the inner cylinder portion of the second connector forms a circumferential step on the inner peripheral surface provided at a position retracted from the tip inside the inner cylinder portion. The flow path connecting device according to claim 1, wherein the flow path connecting device is an annular rib.   2. The flow path connection device according to claim 1, wherein tip surfaces of the inner cylinder part and the outer cylinder part of the second connector are located on the same plane orthogonal to a tube axis of the inner cylinder part. The engaging claw forms a gap between the first flow path end connecting portion and the end face side end surface,
The engagement wall is connected to the outer cylinder part via a flange extending outward from the outer peripheral surface of the outer cylinder part,
On the distal end side of the engagement wall, an inward convex portion that protrudes inward from the inner peripheral surface and extends in the circumferential direction is provided, and a gap is formed between the flange portion,
The flow path connecting device according to claim 1, wherein the engagement claw and the engagement wall are engaged by causing the engagement claw and the inward convex portion to enter the gap formed by the counterpart.   At least one of the surface of the inner convex portion that faces the distal end surface of the flange portion and the surface of the engagement claw that faces the distal end side end surface of the first flow path end connecting portion is a tube of the inner cylindrical portion. The flow path connecting device according to claim 7, wherein the flow path connecting device is inclined along the circumferential direction with respect to an axial direction. The flow path end of the first flow path is a supply port of the nutrient container or an end of a tube extending from the supply port,
The channel connection device according to any one of claims 1 to 8, wherein the channel end of the second channel is an end of a PEG (Percutaneous Endoscopic Gastrostomy) catheter attached to a gastric fistula. The first connector constituting the flow path connection device according to claim 1,
A first flow path end coupling portion coupled to one end of the flow path;
A cylindrical pedestal that is provided integrally with the first flow path end coupling portion and protrudes toward the distal end;
A tubular protrusion protruding from the center of the tip of the pedestal;
The 1st connector provided with the engaging claw which protrudes outward from a part of peripheral part of the tip part of the base. The second connector constituting the flow path connection device according to claim 1,
A second flow path end coupling portion coupled to the other flow path end;
An inner cylindrical portion that is integrally formed with the second flow path end connecting portion and protrudes toward the distal end, and is insertable into the tubular convex portion of the first connector;
An outer cylinder that is arranged concentrically with the inner cylinder part, is coupled to a proximal end side of the inner cylinder part, and forms an annular recess in which the tubular convex part can be fitted between the outer peripheral surface of the inner cylinder part And
A second connector including an engagement wall connected to the outer cylinder portion and extending toward a distal end side in a tube axis direction and protruding from the distal end of the outer cylinder portion. A container main body having a hollow cylindrical port that allows liquid to enter and exit;
A first connector according to claim 10;
The first connector is a nutrient container in which the first flow path end coupling portion is integrated with the port or is detachably connected to the port.   A liquid feeding circuit comprising: the second connector according to claim 11; and a liquid feeding tube connected to the second flow path end coupling portion of the second connector.

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