JP2018027177A - Male connector disassembling tool and male connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool for disassembling a male connector.SOLUTION: A tool 60 is used for disassembling a male connector 1 where a male connector body 10 is mounted to a base part 30. The base part and the male connector body comprises engagement structures 14, 34 respectively engaged with each other. One of the engagement structures is provided in an elastically deformable engagement piece 13. The tool includes first and second movable parts 61, 62 facing each other. A wedge-shaped claw 71 is provided in at least one of the first and second movable parts. The tool is elastically deformable so that the distance between the first and the second movable parts changes. The tool is configured in such a manner that if the male connector is inserted between the first and second movable parts and the tool is deformed so that the distance between the first and the second movable part is reduced, the claw enters between the base part and the male connector body, so that the engagement piece is elastically deformed and the engagement of the engagement structure can be released.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a tool for disassembling a male connector. The present invention also relates to a male connector that is difficult to disassemble unless a dedicated tool is used.

  Enteral nutrition is known as a method of administering a liquid substance containing a nutrient or a drug to a patient who cannot take a meal from the mouth. In enteral nutrition, a catheter is placed in a patient with the catheter inserted from the outside of the body into the digestive tract (for example, the stomach). Known catheters include a nasal catheter inserted from the patient's nose, a PEG (Percutaneous Endoscopic Gastrostomy) catheter inserted into a gastric fistula formed on the patient's abdomen, and the like. A liquid such as a nutrient, liquid food (commonly referred to as “enteral nutrient”), or a drug is administered to a patient via a catheter. When administering a liquid substance to a patient, a container storing the liquid substance and a catheter (nasal catheter, PEG catheter, etc.) placed in the patient are communicated via a flexible tube. In order to connect different members, a connector composed of a male connector and a female connector is used. Conventionally, a male connector is used as an upstream (container-side) connector (hereinafter referred to as “container-side connector”) and a downstream (patient-side) connector (hereinafter referred to as “patient-side connector”) with respect to a liquid flow Each connector was used (see, for example, Patent Document 1).

  In recent years, in order to prevent erroneous connection with connectors used in fields other than enteral nutrition, the female connector 910 shown in FIGS. 15A and 15B is used as a container-side connector, and FIGS. 16A and 16B are used as patient-side connectors. It is considered that the male connector 920 shown in FIG. 1 is internationally standardized as an international standard ISO80369-3 regarding nutritional medical devices.

  A female connector (container-side connector) 910 shown in FIGS. 15A and 15B has a hollow cylindrical tubular portion (female member) 911. The inner peripheral surface 911a of the tubular portion 911 is a tapered surface (so-called female tapered surface) whose inner diameter increases as it approaches the tip. A threaded projection (male thread) 915 is formed on the outer peripheral surface of the tubular portion 911.

  A male connector (patient-side connector) 920 shown in FIGS. 16A and 16B includes a cylindrical male member 921 and an outer cylinder 923 that surrounds the male member 921. The male member 921 and the outer cylinder 923 are connected via a base portion 924 that protrudes in a flange shape along the radial direction from the base end portion of the male member 921. The outer peripheral surface 921a of the male member 921 is a tapered surface (so-called male tapered surface) whose outer diameter decreases as it approaches the tip. A flow path 927 passes through the male member 921 along the longitudinal direction of the male member 921. A female screw 925 is provided on the inner peripheral surface of the outer cylinder 923 facing the male member 921.

  When performing enteral nutrition, the female connector 910 and the male connector 920 insert a male member 921 into the tubular portion 911 and screw the screw-like projection 915 and the female screw 925 as shown in FIG. Let them connect. Since the inner peripheral surface 911a of the tubular portion 911 and the outer peripheral surface 921a of the male member 921 are tapered surfaces having the same diameter and taper angle, they form a liquid-tight seal and come into surface contact. The screw-like protrusion 915 and the female screw 925 that are screwed together constitute a screw lock mechanism for locking the connection state between the female connector 910 and the male connector 920.

International Publication No. 2008/152871 Pamphlet

  In the male connector 920, the outer cylinder 923 surrounds the male member 921, and a female screw 925 is provided on the inner peripheral surface of the outer cylinder 923. Therefore, after the enteral nutrition method is performed, when the male connector 920 is separated from the female connector 910, a liquid substance (enteral) is placed in the gap 929 (for example, the valley of the female screw 925) between the male member 921 and the outer cylinder 923. Nutrients are likely to remain.

  However, the distance between the outer peripheral surface 921a of the male member 921 and the female screw 925 of the outer cylinder 923 is very narrow. Therefore, it is difficult to wipe off the liquid material remaining in the gap 929 by inserting, for example, a cotton swab into the gap 929 between the male member 921 and the outer cylinder 923.

  When the male connector 920 is provided at the upstream end of the catheter inserted into the patient, the male connector 920 continues to be placed in the patient together with the catheter. In the case of a PEG catheter, the catheter is usually exchanged every 1 to 6 months. If the male connector 920 in which the liquid material remains is left in the patient for such a long period of time, the male connector 920 can be in an unsanitary state. Finally, bacteria may propagate in the male connector 920, and the bacteria may enter the patient's body and cause serious complications. Accordingly, it is desirable that the male connector 920 be removable for cleaning or replacement while the catheter remains in the patient.

  However, if the male connector can be easily removed, there is an increased possibility that the patient will accidentally remove the male connector. This can be a problem in terms of safety and hygiene.

  A first object of the present invention is to provide a tool for disassembling a male connector. A second object of the present invention is to provide a male connector that is difficult to disassemble unless a dedicated tool is used.

  The male connector disassembling tool of the present invention is used to disassemble a male connector having a male connector body mounted on a base portion so that the male connector main body is separated from the base portion. Each of the base part and the male connector main body includes an engagement structure that engages with each other when the male connector main body is mounted on the base part. The engagement structure of one of the base portion and the male connector main body is provided in an elastically deformable engagement piece. The tool includes a wedge-shaped claw provided on a surface facing the other of at least one of the first movable portion and the second movable portion facing each other and the first movable portion and the second movable portion. With. The tool is elastically deformable so that the distance between the first movable part and the second movable part changes. In the tool, the male connector main body mounted on the base portion is inserted between the first movable portion and the second movable portion, and the first movable portion and the second movable portion are inserted. When the tool is deformed so that the distance between the two is reduced, the claw enters between the base portion and the male connector body, elastically deforms the engagement piece, and engages the engagement structure. It is configured to be able to cancel.

  The male connector of this invention is provided with a base part and a male connector main body which can be attached or detached to the said base part. Each of the base part and the male connector main body includes an engagement structure that engages with each other when the male connector main body is mounted on the base part. The engagement structure of one of the base portion and the male connector main body is provided in an elastically deformable engagement piece. The engagement piece is fitted into a recess provided on the other of the base portion and the male connector main body. When the engagement piece is elastically deformed, the male connector is configured such that the engagement of the engagement structure is released and the male connector main body can be separated from the base portion.

  The tool of this invention is provided with the 1st and 2nd movable part, and the wedge-shaped nail | claw provided in at least one of the 1st and 2nd movable part. The tool inserts a male connector between the first movable part and the second movable part and allows a claw to enter between the base part and the male connector main body, whereby the engagement structure of the base part and the male connector are inserted. It is comprised so that engagement with the engagement structure of a main body can be cancelled | released. For this reason, by using the tool of the present invention, the male connector can be easily disassembled so that the male connector main body is separated from the base portion.

  The male connector of this invention is provided with the engaging structure mutually engaged provided in each of a base part and a male connector main body. One engaging structure of the base part and the male connector main body is provided on an engaging piece that can be elastically deformed. The engagement piece fits into a recess provided on the other of the base part and the male connector main body. For this reason, it is difficult to release the engagement of the engagement structure by placing a finger on the engagement piece and elastically deforming the engagement piece. Therefore, it is difficult to disassemble the male connector of the present invention so that the male connector main body is separated from the base portion unless a dedicated tool is used.

FIG. 1 is a perspective view of a PEG catheter provided with a male connector according to Embodiment 1 of the present invention. FIG. 2A is an exploded perspective view of the male connector according to Embodiment 1 of the present invention as viewed from above. FIG. 2B is an exploded cross-sectional perspective view of the male connector according to Embodiment 1 of the present invention as viewed from above. FIG. 3 is an exploded perspective view of the male connector according to Embodiment 1 of the present invention as viewed from below. FIG. 4A is a perspective view of the male connector according to Embodiment 1 of the present invention. FIG. 4B is a side view of the male connector according to Embodiment 1 of the present invention. FIG. 5A is a cross-sectional perspective view of the male connector according to Embodiment 1 of the present invention as viewed from above. FIG. 5B is another cross-sectional perspective view of the male connector according to Embodiment 1 of the present invention as seen from above. FIG. 6A is a perspective view of the male connector disassembling tool according to Embodiment 1 of the present invention. FIG. 6B is a front view of the male connector disassembling tool according to Embodiment 1 of the present invention. FIG. 7 is a side view showing a step of disassembling the male connector using a tool in the first embodiment of the present invention. FIG. 8A is a side view showing the next step of disassembling the male connector using a tool in the first embodiment of the present invention. FIG. 8B is a perspective cross-sectional view seen from below on a horizontal plane including the line 8B-8B in FIG. 8A. FIG. 9A is a side view showing a further next step of disassembling the male connector using a tool in the first embodiment of the present invention. 9B is a perspective cross-sectional view seen from below in a horizontal plane including line 9B-9B in FIG. 9A. FIG. 10 is a side view showing a further next step of disassembling the male connector using a tool in the first embodiment of the present invention. FIG. 11A is a perspective view of another male connector disassembling tool according to Embodiment 1 of the present invention. FIG. 11B is a front view of still another male connector disassembling tool according to Embodiment 1 of the present invention. FIG. 11C is a front view of still another male connector disassembling tool according to Embodiment 1 of the present invention. FIG. 11D is a perspective view of a hinge provided in still another male connector disassembling tool according to Embodiment 1 of the present invention. FIG. 11E is a perspective view of a hinge provided in still another male connector disassembling tool according to Embodiment 1 of the present invention. FIG. 12A is a perspective view of a male connector disassembling tool according to Embodiment 2 of the present invention. FIG. 12B is a side view of the male connector disassembling tool according to Embodiment 2 of the present invention. FIG. 13A is a perspective view of a male connector disassembling tool according to Embodiment 3 of the present invention. FIG. 13B is a front view of the male connector disassembling tool according to Embodiment 3 of the present invention. FIG. 14A is a perspective view of a male connector disassembling tool according to Embodiment 4 of the present invention. FIG. 14B is a perspective view of the male connector disassembling tool according to Embodiment 4 of the present invention as seen from another direction. FIG. 15A is a perspective view of a male connector being considered as ISO80369-3. FIG. 15B is a cross-sectional view along a plane including the central axis of the male connector. FIG. 16A is a perspective view of a female connector considered as ISO 80369-3. FIG. 16B is a cross-sectional view along a plane including the central axis of the female connector. FIG. 17 is a cross-sectional view showing a state in which a male connector and a female connector that are under consideration as ISO 80369-3 are connected.

  The male connector disassembling tool of the present invention is used to disassemble a male connector having a male connector body mounted on a base portion so that the male connector main body is separated from the base portion. Each of the base part and the male connector main body includes an engagement structure that engages with each other when the male connector main body is mounted on the base part. The engagement structure of one of the base portion and the male connector main body is provided in an elastically deformable engagement piece. The tool includes a wedge-shaped claw provided on a surface facing the other of at least one of the first movable portion and the second movable portion facing each other and the first movable portion and the second movable portion. With. The tool is elastically deformable so that the distance between the first movable part and the second movable part changes. In the tool, the male connector main body mounted on the base portion is inserted between the first movable portion and the second movable portion, and the first movable portion and the second movable portion are inserted. When the tool is deformed so that the distance between the two is reduced, the claw enters between the base portion and the male connector body, elastically deforms the engagement piece, and engages the engagement structure. It is configured to be able to cancel.

  In the tool of the present invention described above, the claw may elastically deform the engagement piece so that the engagement piece is separated from the central axis of the male connector. Such a configuration is advantageous for reliably disengaging the engagement structure with a simple claw movement.

  Each of the first movable part and the second movable part may include the claw. In this case, the claw of the first movable part and the claw of the second movable part may be configured to elastically deform a common engagement piece. According to such a configuration, the two claws elastically deform one engagement piece. For this reason, since the said structure can deform | transform an engagement piece easily and reliably, it is advantageous to the improvement of the reliability of the operation | movement of disassembly of the male connector using a tool.

  The tool of the present invention may include a holder portion into which the male connector body is inserted when the male connector is inserted between the first movable portion and the second movable portion. Such a configuration is advantageous for stabilizing the posture of the tool with respect to the male connector.

  The tool according to the present invention may be configured such that the claw cannot enter between the base portion and the male connector main body unless the male connector main body is inserted into the holder portion. . Such a configuration reduces the possibility of erroneous operation of the tool, which is advantageous in improving the workability of disassembling the male connector.

  When the tool is not in a predetermined position in the direction around the central axis with respect to the male connector, the holder portion prevents the claw from entering between the base portion and the male connector body. It may be configured. Such a configuration reduces the possibility of erroneous operation of the tool, which is advantageous in improving the workability of disassembling the male connector.

  The holder portion may be configured to hold the male connector main body separated from the base portion. Such a configuration is advantageous for stably holding the male connector main body without dropping it from the tool after the male connector is disassembled.

  The tool of the present invention may include an axis alignment mechanism that aligns the tool so as to be coaxial with the male connector. The axis alignment mechanism is advantageous for easily aligning the tool pawl with the desired location of the male connector.

  The tool of the present invention may include a rotation direction positioning mechanism that positions the tool in the direction around the central axis with respect to the male connector. The rotational positioning mechanism is advantageous for easily aligning the tool pawl with the desired location of the male connector.

  The above-described tool of the present invention may further include a clamp capable of closing the flow path in the catheter to which the male connector is attached. The clamp is advantageous in preventing the occurrence of a situation in which the contents of the stomach of the patient flow backward through the flow path of the catheter provided with the male connector while the male connector is being disassembled.

  In the above-described tool of the present invention, the first movable portion and the second movable portion may be connected via at least one deformable portion that can be elastically bent and deformed. Such a configuration is advantageous for realizing a tool that can be elastically deformed so that the distance between the first movable unit and the second movable unit changes with a simple configuration. The configuration of the deformable portion is arbitrary, but may be a hinge configured to be selectively bent and deformed by relatively thinning, for example.

  In the above, the at least one deformable portion may be constituted by two deformable portions. In this case, the two deformable parts may be arranged in series between the first movable part and the second movable part. According to such a configuration, it is possible to provide the holder part between the two deformable parts.

  Alternatively, the at least one deformable part may comprise only one deformable part. Such a configuration is advantageous for realizing a tool having a shape similar to general tweezers. Such a tool has a simple structure and can be manufactured easily and at low cost. Moreover, since the first and second movable parts always face each other regardless of the deformation state of the tool, the disassembly work of the male connector using the tool is easy.

  Alternatively, the at least one deformable portion may be composed of two deformable portions. In this case, the two deformable parts may be arranged in parallel between the first movable part and the second movable part. Such a configuration is advantageous for realizing a tool having an annular shape. Such a tool is excellent in durability against repeated deformation. Further, since the first and second movable parts are always facing and parallel regardless of the deformation state of the tool, the disassembly work of the male connector using the tool is further facilitated.

  The male connector of this invention is provided with a base part and a male connector main body which can be attached or detached to the said base part. Each of the base part and the male connector main body includes an engagement structure that engages with each other when the male connector main body is mounted on the base part. The engagement structure of one of the base portion and the male connector main body is provided in an elastically deformable engagement piece. The engagement piece is fitted into a recess provided on the other of the base portion and the male connector main body. When the engagement piece is elastically deformed, the male connector is configured such that the engagement of the engagement structure is released and the male connector main body can be separated from the base portion.

  You may provide an engagement piece in any of a base part and a male connector main body. Although the engagement structure which mutually engages is not limited, For example, it can comprise by a protrusion and the recessed part (a hole is included) in which the said protrusion fits. In this case, the engagement piece may be provided with either a protrusion or a recess. Alternatively, the engaging structure that engages with each other may be constituted by a first protrusion and a second protrusion that engages with the first protrusion.

  The number of sets of engaging structures that engage with each other is arbitrary. When a plurality of sets of engagement structures are provided, the plurality of sets of engagement structures are preferably arranged at equiangular intervals with respect to the central axis.

  The other engagement structure of the base part and the male connector main body may be provided in the recess. In such a configuration, an engagement structure that engages with an engagement structure provided in the engagement piece is provided in the recess into which the engagement piece is fitted. This is advantageous in that it is more difficult to release the engagement structure unless a dedicated tool is used.

  The male connector of the present invention is configured such that the engagement of the engagement structure is released when the engagement piece is elastically deformed so that the engagement piece is separated from the central axis of the male connector. Also good. Such a configuration is advantageous in simplifying the configuration of the engagement structure and facilitating the release of the engagement of the engagement structure when a dedicated tool is used.

  The male connector according to the present invention may further include a seal disposed between the base portion and the male connector main body. In this case, when the engagement structure of the base portion and the engagement structure of the male connector main body are engaged, the seal may be compressed and deformed in the central axis direction of the male connector. Such a configuration is advantageous for forming a fluid-free flow path in the releasable male connector. Further, when the engagement of the engagement structure is released, the male connector body is pushed out by the elastic recovery force of the seal, which is advantageous for facilitating the disassembly work of the male connector.

  The male connector body includes a rod-shaped male member provided with a flow path along a central axis, an outer cylinder that surrounds the male member coaxially with the male member, and an inner circumference that faces the male member of the outer cylinder You may provide the internal thread provided in the surface. Since it is difficult for such a male connector main body to clean the clearance gap between a male member and an outer cylinder, it is easy to reach an unsanitary state. Since the male connector of the present invention can be removed or replaced or washed by removing the male connector body from the base as necessary, the male connector body can always be kept clean.

  Below, this invention is demonstrated in detail, showing suitable embodiment. However, it goes without saying that the present invention is not limited to the following embodiments. Each drawing referred to in the following description shows simplified main members constituting an embodiment of the present invention for convenience of description. Therefore, the present invention can include any member not shown in the following drawings. Further, within the scope of the present invention, each member shown in the following drawings can be changed or omitted. In the drawings cited in the description of the embodiments, members corresponding to the members shown in the drawings cited in the preceding embodiments are denoted by the same reference numerals as those in the drawings of the preceding embodiments. About such a member, the overlapping description is abbreviate | omitted and you should consider the description of previous embodiment suitably.

(Embodiment 1)
1. Male Connector FIG. 1 is a perspective view of a PEG catheter 800 provided with a male connector 1 according to Embodiment 1 of the present invention. The catheter 800 is a balloon tube type catheter provided with a balloon 809 near the end (lower end) of the flexible catheter body 811. A disc-shaped stopper 808 is provided at a position slightly away from the balloon 809. With the catheter body 811 penetrating the gastric fistula, the balloon 809 is in contact with the inner surface of the stomach wall, and the stopper 808 is in contact with the outer surface of the abdomen, the catheter 800 is placed in the patient. A portion of the catheter body 811 above the stopper 808 is led out of the patient's body. A male connector 1 is provided at the upper end of the catheter body 811. A branch tube 812 branches off from a position near the upper end of the catheter body 811, and a connection portion 813 is provided at the tip thereof. In the catheter body 811, first and second flow paths (not shown) that are independent from each other are provided. The first flow path communicates the male connector 1 with an opening (not shown) at the end of the catheter body 811. The second flow path allows the connection portion 813 and the balloon 809 to communicate with each other. The liquid substance can be injected into the stomach of the patient via the male connector 1 and the first flow path. An injector (for example, a syringe) is connected to the connection portion 813, and distilled water can be injected into the balloon 809 via the second flow path to inflate the balloon 809.

  2A is an exploded perspective view seen from above the male connector 1, and FIG. 2B is an exploded sectional perspective view thereof. FIG. 3 is an exploded perspective view of the male connector 1 as viewed from below. As shown in these drawings, the male connector 1 includes a male connector main body 10, a base portion 30, and a seal 40. In FIG. 2B, the alternate long and short dash line 1 a is the central axis of the male connector 1. In the present invention, the upstream side in the liquid material flow direction (the male connector main body 10 side in FIGS. 2A, 2B, and 3) is referred to as the “tip side” or the “upper side”, and the downstream side in the liquid material flow direction ( 2A, 2B, and 3 are referred to as “base end side” or “lower side”. The direction along the central axis 1a is referred to as “vertical direction”, and the direction parallel to the plane perpendicular to the central axis 1a is referred to as “horizontal direction”. The direction orthogonal to the central axis 1a is referred to as “radial direction”, and the direction of rotation around the central axis 1a is referred to as “circumferential direction” or “rotational direction”. However, “upper side”, “lower side”, “vertical direction”, and “horizontal direction” do not mean the orientation when the male connector 1 is used.

  The male connector body 10 includes a male connector portion 20 on the upper side and a pair of engaging pieces 13 on the lower side.

  As shown in FIGS. 2A and 2B, the male connector portion 20 includes a male member 21 and an outer cylinder 23 that are coaxial with the central shaft 1a. The male member 21 is a rod-shaped member. The flow path 17 penetrates the male connector main body 10 in the vertical direction along the central axis 1a. The outer peripheral surface 21a of the male member 21 is a tapered surface (so-called male tapered surface) whose outer diameter decreases as it approaches the tip. The outer cylinder 23 has a hollow cylindrical shape and surrounds the male member 21. A female screw 25 is provided on the inner peripheral surface of the outer cylinder 23 (the surface facing the male member 10). The male member 21 and the outer cylinder 22 (especially the thread of the female screw 25) are spaced apart in the radial direction, and a gap 29 exists between them. The outer peripheral surface 23a of the outer cylinder 23 is a cylindrical surface whose outer diameter is constant in the vertical direction. The male connector unit 20 may conform to a male connector (male connector 920 shown in FIGS. 16A and 16B) of the international standard ISO 80369-3 regarding nutritional medical devices.

  As shown in FIG. 2B, the male member 21 and the outer cylinder 23 are connected to each other via a base 11 disposed on the lower side thereof. The pair of engagement pieces 13 extend downward from the base 11. The outer peripheral surface of the engaging piece 13 (the surface opposite to the central axis 1a) is a cylindrical surface that is coaxial with the outer peripheral surface 23a of the outer cylinder 23 and has the same diameter. Each engagement piece 13 is provided with a through hole 14 that penetrates the engagement piece 13 in the radial direction.

  An annular groove 18 that is continuous in the circumferential direction is provided on the outer peripheral surface of the male connector body 10 (more specifically, the outer peripheral surface of the base 11). The annular groove 18 is located between the male connector portion 20 and the engagement piece 13 in the vertical direction.

  As shown in FIG. 3, a pair of grooves 28 are provided on the outer peripheral surface 23 a of the outer cylinder 23. The groove 28 extends from the upper end of the outer peripheral surface 23a to the lower end (or the annular groove 18) in parallel with the central axis 1a. A substantially cylindrical annular protrusion 15 projects downward from the lower surface of the base 11. The annular protrusion 15 takes in an opening facing downward of the flow path 17. The annular protrusion 15 is disposed coaxially with the central axis 1 a and is spaced apart from the engagement piece 13 in the radial direction.

  As shown in FIGS. 2A and 3, the outer peripheral surface 30 a of the base portion 30 is a cylindrical surface having substantially the same diameter as the outer peripheral surface 23 a of the outer cylinder 23 of the male connector body 10 and the outer peripheral surface of the engagement piece 13. It is. However, a pair of horizontal grooves 32 and a pair of vertical grooves 33 are provided on the outer peripheral surface 30a. The horizontal groove 32 extends along the horizontal direction at a position slightly spaced downward from the upper end of the base portion 30. The pair of horizontal grooves 32 are parallel to each other. The vertical groove 33 extends along the vertical direction from the upper end of the base portion 30 to the horizontal groove 32. The horizontal groove 32 is deeper than the vertical groove 33. The length of the horizontal groove 32 along the longitudinal direction is longer than the width of the vertical groove 33 along the same direction. The width of the vertical groove 33 is preferably the same as or larger than the width of the engagement piece 13 in the same direction so that the engagement piece 13 can be fitted into the vertical groove 33 (see FIG. 4A described later). Slightly bigger.

  In each vertical groove 33, a protrusion 34 protruding outward in the radial direction is provided. The protrusion 34 includes an inclined surface 34a and an engagement surface 34b. The inclined surface 34a is inclined so as to move away from the central axis 1a as it goes downward. The engagement surface 34b is substantially parallel to the horizontal direction. The engaging surface 34b is located below the inclined surface 34a and constitutes a flat surface that is common to the upper side wall of the horizontal groove 32. The inclined surface 34a and the engaging surface 34b intersect at the top of the projection 34 (the portion of the projection 34 farthest from the central axis 1a).

  As shown in FIG. 2B, the base portion 30 has a generally hollow cylindrical shape provided with a flow path 31 that passes through the base portion 30 along the central axis 1a. The inner diameter of the inner peripheral surface of the base part 30 is not constant in the vertical direction. On the inner peripheral surface of the base portion 30, a large diameter portion 36 is provided in a predetermined region from the upper end of the base portion 30, and a small diameter portion 37 is provided below this. The inner peripheral surfaces of the large-diameter portion 36 and the small-diameter portion 37 are both cylindrical surfaces coaxial with the central axis 1 a, but the inner diameter of the large-diameter portion 36 is larger than the inner diameter of the small-diameter portion 37. Between the large-diameter portion 36 and the small-diameter portion 37, a step surface 38 resulting from the difference in inner diameter between them is provided. The step surface 38 is an annular region that is parallel to the horizontal direction and coaxial with the central axis 1a. The inner diameter of the large-diameter portion 36 is preferably the same as or slightly smaller than the outer diameter of the annular protrusion 15 so that the annular protrusion 15 of the male connector body 10 can be fitted. The inner diameter of the small-diameter portion 37 is preferably substantially the same as the inner diameter of the flow path 17 that opens at the lower end of the annular protrusion 15 of the male connector body 10.

  A pair of locking holes 35 are provided in the large diameter portion 36. The locking hole 35 is a through hole that penetrates the large-diameter portion 36 in the radial direction. When viewed from above, the direction in which the pair of locking holes 35 oppose each other is substantially parallel to the direction in which the pair of horizontal grooves 32 extend, and is substantially orthogonal to the direction connecting the pair of protrusions 34. The locking hole 35 does not have to be a through-hole penetrating the large-diameter portion 36, and may be a recess provided on the inner peripheral surface of the large-diameter portion 36.

  The base portion 30 has a double tube structure including an outer tube 39 a and an inner tube 39 b in a region below the horizontal groove 32. The outer peripheral surface of the outer tube 39 a constitutes a part of the outer peripheral surface 30 a of the base portion 30. The inner peripheral surface of the inner tube 39 b defines the flow path 31 together with the inner peripheral surface of the small diameter portion 37 of the base portion 30. The inner tube 39b is inserted into the catheter body 811 (see FIG. 1), whereby the base portion 30 is fixed to the upper end of the catheter body 811. The flow path 31 communicates with the first flow path 801 in the catheter body 811. The first flow path 801 is open at the lower end (terminal) of the catheter body 811.

  As shown in FIGS. 2A and 2B, the seal 40 includes an annular ring 41 having an opening (through hole) 42 in the center. A pair of locking projections 45 protrude outward from the outer peripheral surface of the ring 41 along the radial direction. The outer diameter of the ring 41 is preferably substantially the same as or slightly smaller than the inner diameter of the large-diameter portion 36 of the base portion 30. The inner diameter of the opening 42 is preferably substantially the same as the inner diameter of the small-diameter portion 37 of the base portion 30.

  Each of the male connector main body 10, the base portion 30, and the seal 40 is rotationally symmetrical twice with respect to the central axis 1a (overlapping the state before rotation when rotated 180 degrees around the central axis 1a).

  The material of the male connector body 10 and the base part 30 is not limited, but is preferably a hard material (hard material) having a mechanical strength (rigidity) that does not substantially deform due to an external force. For example, resin materials such as polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), hard polyvinyl chloride, polyacetal (POM), polystyrene, polyamide, polyethylene, polypropylene (PP) can be used. Polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), and rigid polyvinyl chloride are preferred. The male connector main body 10 and the base part 30 can be integrally manufactured as a whole by injection molding or the like using the above resin materials.

  The material of the seal 40 is not limited, but is a soft material having rubber elasticity such as rubber such as natural rubber, isoprene rubber, and silicone rubber, and thermoplastic elastomer such as styrene elastomer, olefin elastomer, and polyurethane elastomer ( (Also called elastomers) can be used. The seal 40 can be integrally manufactured as a whole by using such a material.

  4A is a perspective view of the male connector 1, and FIG. 4B is a side view thereof. 5A and 5B are cross-sectional perspective views of the male connector 1 along a plane including the central axis 1a. 5A and 5B are orthogonal to each other. The cross section of FIG. 5A is the same as the cross section of FIG. 2B. As can be understood from these drawings, the male connector 1 is assembled as follows.

  That is, in FIG. 2A, first, the seal 40 is inserted into the large diameter portion 36 of the base portion 30. The locking projection 45 of the seal 40 is fitted into the locking hole 35 of the base portion 30 (see FIG. 5B).

  Next, the male connector body 10 is attached to the base portion 30. That is, the engagement piece 13 of the male connector main body 10 is inserted into the vertical groove 33 of the base portion 30, and the male connector main body 10 is pushed toward the base portion 30. The lower end 13b (see FIG. 3) of the engagement piece 13 contacts the inclined surface 34a of the protrusion 34, and slides on the inclined surface 34a. Accordingly, the engagement piece 13 is elastically bent and deformed so that the lower end 13b is displaced outward in the radial direction. When the protrusion 34 is fitted into the through hole 14 of the engagement piece 13, the engagement piece 13 is immediately elastically restored. Thus, as shown in FIGS. 4A and 5A, the protrusion 34 (particularly, the engagement surface 34 b (see FIG. 3)) engages with the edge of the through hole 14 of the engagement piece 13. Since the protrusion 34 includes the inclined surface 34 a, the engaging surface 13 is deformed by simply pushing the male connector body 10 toward the base portion 30, and the protrusion 34 is formed in the through hole 14 of the engaging piece 13. Can be engaged.

  As shown in FIG. 5A, the annular protrusion 15 of the male connector main body 10 is inserted into the large-diameter portion 36 of the base portion 30. The ring 41 of the seal 40 is sandwiched between the annular protrusion 15 of the male connector body 10 and the stepped surface 38 of the base portion 30 and compressed in the vertical direction. Therefore, a liquid-tight seal is formed between the male connector main body 10 (particularly, the annular protrusion 15) and the seal 40 and between the seal 40 and the base part 30 (particularly, the stepped surface 38). The As a result, the flow path 17 of the male connector body 10, the opening 42 of the seal 40, the flow path 31 of the base portion 30, and the first flow path 801 of the catheter body 811 are communicated in this order. The male connector main body 10, the seal 40, and the base portion 30 form a flow path without liquid leakage in the male connector 1.

  Two sets of engaging pieces 13 and protrusions 34 that are engaged with each other are arranged at symmetrical positions with respect to the central axis 1a. This is advantageous for stably mounting the male connector main body 10 coaxially on the base portion 30 while compressing the seal 40 in the direction of the central axis 1a.

  As shown in FIG. 4A, the engagement piece 13 is fitted in the vertical groove 33 and protrudes on the horizontal groove 32. The lower end 13 b of the engagement piece 13 is in contact with or close to the lower side wall 32 b of the horizontal groove 32. Since the length along the longitudinal direction of the horizontal groove 32 is longer than the width along the same direction of the engagement piece 13, both end portions in the longitudinal direction of the horizontal groove 32 are exposed without being covered with the engagement piece 13. Has been. As shown in FIG. 4B, when viewed along the longitudinal direction of the horizontal groove 32, the engagement piece 13 and the bottom surface 32a of the horizontal groove 32 are spaced apart from each other and face each other. The other side of the male connector 1 can be seen through the gap (that is, the horizontal groove 32) between the engagement piece 13 and the bottom surface 32a. The horizontal groove 32 functions as a guide groove for guiding a claw 71 (see FIG. 6A described later) provided in a tool for disassembling the male connector 1 (details will be described later).

  Thus, as shown in FIG. 1, the male connector 1 is attached to the upper end of the catheter 800. The catheter 800 and the male connector 1 are placed in the patient. When performing enteral nutrition, a female connector (not shown) is connected to the male connector 1. The female connector is provided, for example, at the downstream end of the tube connected to the container storing the liquid material or at the mouth of an injector (for example, a syringe) storing the liquid material. The female connector may be a female connector 910 (see FIGS. 15A and 15B) compliant with ISO 80369-3.

  As described above, the protrusion 34 of the base portion 30 is fitted into the through hole 14 of the male connector body 10 (see FIG. 5A). Therefore, even if a tensile force acts between the catheter body 811 and the female connector, or even if the pressure of the liquid material flowing through the first flow path 801 of the male connector 1 and the catheter body 811 increases, the base The male connector 1 is not disassembled so that the male connector body 10 is separated from the portion 30.

  As can be easily understood from FIG. 4A, the outer peripheral surface 23a of the outer tube 23 of the male connector main body 10, the outer peripheral surface of the engagement piece 13, and the outer peripheral surface 30a of the base portion 30 are the same coaxial with the central axis 1a. Since they are cylindrical surfaces having a diameter, these outer peripheral surfaces are combined to form a common single cylindrical surface. The cylindrical surface constitutes the outer peripheral surface of the male connector 1. Although the male connector 1 is configured by combining a plurality of components, the outer peripheral surface of the male connector 1 is a smooth single cylindrical surface with few irregularities. For this reason, when male connector 1 becomes a patient's underlay, a patient is unlikely to feel pain.

  The engaging piece 13 is fitted into a vertical groove 33 provided in the base portion 30 without protruding outward in the radial direction. This is advantageous for smoothing the outer peripheral surface of the male connector 1. Furthermore, since it is difficult for the patient to place a finger (or nail) on the engagement piece 13 and displace the engagement piece 13 outward in the radial direction, the patient may disassemble the male connector 1 by mistake. It is advantageous to reduce the property.

  On the other hand, the male connector 1 can easily separate the male connector body 10 from the base portion 30 by using a dedicated tool. Below, the decomposition | disassembly method of the male connector 1 using a tool and a tool is demonstrated.

2. 6A is a perspective view of a male connector disassembling tool (hereinafter simply referred to as “tool”) 60 according to the first embodiment of the present invention. FIG. 6B is a front view of the tool 60. A point 60 a in FIG. 6B is the central axis of the tool 60. The central axis 60a extends along a direction perpendicular to the paper surface of FIG. 6B.

  The tool 60 includes a pair of movable parts 61 and 62 facing each other, a stop part 63, and two hinges 64a and 64b. The movable parts 61 and 62 and the stop part 63 are all flat plates having a substantially rectangular main surface (surface having the largest area). The main surface of the stop part 63 is perpendicular to the central axis 60a. The two hinges 64 a and 64 b are arranged in series between the movable parts 61 and 62. That is, the 1st movable part 61 and the stop part 63 are connected via the 1st hinge 64a, and the 2nd movable part 62 and the stop part 63 are connected via the 2nd hinge 64b. The thickness of the hinges 64a and 64b is thinner than the thickness of the movable parts 61 and 62 and the stop part 63. Therefore, the first hinge 64a can be elastically bent and deformed, whereby the first movable portion 61 can be elastically rotated with respect to the stop portion 63 about the first hinge 64a. Similarly, the second hinge 64b can be elastically bent and deformed, whereby the second movable portion 62 can be elastically rotated with respect to the stop portion 63 about the second hinge 64b. In a natural state where the hinges 64a and 64b are not elastically deformed, the movable portions 61 and 62 are substantially perpendicular to the stop portion 63, and the first movable portion 61 and the second movable portion 62 are substantially parallel.

  A circular opening (through hole) 66 is provided at the center of the stop portion 63. A cylindrical holder portion 67 projects toward the same side as the movable portions 61 and 62 along the edge of the opening 66. The inner peripheral surface of the holder part 67 is a cylindrical surface coaxial with the central axis 60a. The inner diameter of the inner peripheral surface of the holder portion 67 is preferably the same as or slightly larger than the outer diameter of the male connector body 10 so that the distal end portion (particularly the outer cylinder 23) of the male connector body 10 can be inserted. Is set. A pair of ribs 68 protruding toward the central axis 60 a are provided on the inner peripheral surface of the holder portion 67. The pair of ribs 68 are arranged symmetrically with respect to the central axis 60a, and extend over the entire range in the direction of the central axis 60a of the holder portion 67 in parallel with the central axis 60a.

  A surface (inner surface) of the first movable portion 61 facing the second movable portion 62 is provided with a pair of claws 71, 71 protruding toward the second movable portion 62. Similarly, a pair of claws 71 and 71 projecting toward the first movable portion 61 are also provided on the surface (inner surface) of the second movable portion 62 facing the first movable portion 61. The claw 71 is provided along or in the vicinity of the side farthest from the stop part 63 of the movable parts 61 and 62. The claw 71 is located farther from the stop part 63 than the tip of the holder part 67 (the part farthest from the stop part 63).

  As shown in FIG. 6B, when viewed along the central axis 60 a, each claw 71 is inclined with respect to the vertical surface 72 substantially perpendicular to the movable parts 61 and 62 and the movable parts 61 and 62. The vertical surface 72 and the inclined surface 73 have a substantially right triangle shape (or wedge shape) intersecting at the top of the claw 71. The two claws 71, 71 provided on the common movable part are arranged such that the vertical surfaces 72 face each other and are separated from each other. The distance between the vertical surfaces 72, 72 of the two claws 71, 71 provided in the common movable part is the distance between the bottom surfaces 32a, 32a of the two horizontal grooves 32, 32 provided in the base part 30 ( Same as or slightly larger than (see FIG. 4B). The claws 71, 71 provided on the first movable part 61 and the claws 71, 71 provided on the second movable part 62 are opposed to each other.

  The tool 60 is rotationally symmetric twice with respect to the central axis 60a (when the tool 60 is rotated 180 degrees around the central axis 60a, it overlaps with the state before rotation).

  The movable portions 61 and 62 and the stop portion 63 can be regarded as substantially rigid bodies, whereas the hinges 64a and 64b are relatively easily elastically bent. Therefore, when the outer surface of the movable parts 61 and 62 (the surface opposite to the surface on which the claw 71 is provided) is gripped, the hinges 64a and 64b are selectively bent and deformed, and the distance between the movable parts 61 and 62 is reduced. Thus, the tool 60 can be deformed. When the distance between the movable parts 61 and 62 is reduced, the distance between the two claws 71 provided on the first movable part 61 and the two claws 71 provided on the second movable part 62 is reduced. When the force applied to the movable parts 61 and 62 is released, the tool 60 is elastically restored to the initial shape. The tool 60 can be deformed so that the distance between the movable parts 61 and 62 is increased.

  The material of the tool 60 is not limited, but preferably has flexibility and durability so that the hinges 64a and 64b can be repeatedly deformed. Specifically, a resin material having a relatively low mechanical strength such as polypropylene (PP) or polyethylene (PE) can be used. The tool 60 can be integrally manufactured as a whole by using the above-mentioned materials by an injection molding method or the like.

3. Disassembly method of male connector A disassembly method of the male connector 1 using the tool 60 will be described.

  First, as shown in FIG. 7, the tool 60 is coaxially opposed to the male connector 1. The direction in which the movable parts 61 and 62 of the tool 60 oppose each other is parallel to the direction in which the horizontal groove 32 of the male connector 1 extends. Although illustration is omitted, when viewed from above, the groove 28 provided on the outer peripheral surface 23a of the outer cylinder 23 is around the central axes 1a and 60a of the rib 68 (see FIG. 6A) provided on the tool 60. The rotational direction positions are the same. From this state, the tool 60 is lowered. The male connector 1 is inserted between the movable parts 61 and 62 of the tool 60. More specifically, the male connector main body 10 (particularly, the outer cylinder 23) is inserted into a space surrounded by the four claws 71 provided on the tool 60. If necessary, the hinges 64a and 64b are deformed to increase the distance between the movable parts 61 and 62.

  As shown in FIG. 8A, the male connector 1 is inserted into the tool 60 until the claw 71 of the tool 60 has the same vertical position as the horizontal groove 32 of the male connector 1. A part of the distal end side of the male connector main body 10 (particularly, the outer cylinder 23) is inserted into the holder portion 67 of the tool 60. Thereby, the attitude | position of the tool 60 with respect to the male connector 1 is stabilized.

  The tool 60 is configured so that the claw 71 of the tool 60 cannot be aligned with the horizontal groove 32 of the male connector 1 in the vertical direction unless the male connector body 10 is inserted into the holder portion 67. That is, unless the male connector main body 10 is inserted into the holder portion 67, it is not possible to proceed to the next step of disassembling the male connector 1. For this reason, the possibility of erroneous operation of the tool 60 is reduced, and the disassembly workability of the male connector 1 is improved as a whole.

  FIG. 8B is a perspective cross-sectional view seen from below on a horizontal plane (surface passing through the claw 71 and the horizontal groove 32) including the line 8B-8B in FIG. 8A. As described above, the movable parts 61 and 62 of the tool 60 face each other in the longitudinal direction of the horizontal groove 32 of the base part 30. Two claws 71, 71 provided in the first movable part 61 are respectively inserted into the two horizontal grooves 32. Similarly, the two claws 71, 71 provided in the second movable part 62 are provided in two horizontal positions. Each is inserted into the groove 32. The vertical surface 72 (see FIG. 6B) of each claw 71 is opposed to the bottom surface 32a of the horizontal groove 32 and is close to or in contact with the bottom surface 32a. The tip of each claw 71 is located near the end of the corresponding horizontal groove 32. As described with reference to FIG. 4B, the bottom surface 32a of the horizontal groove 32 and the engagement piece 13 are spaced apart in the radial direction.

  The outer cylinder 23 of the male connector body 10 is inserted into the holder portion 67 of the tool 60. Thereby, the tool 60 is positioned with respect to the male connector 1 so that the male connector 1 and the tool 60 may become coaxial. That is, the holder portion 67 configured to be inserted with the male connector main body 10 constitutes an “axis alignment mechanism” that aligns the tool 60 with the male connector 1. “Axis alignment” includes making the central axis 60 a of the tool 60 parallel to the central axis 1 a of the male connector 1 and positioning the tool 60 with respect to the male connector 1 in the horizontal direction. The shaft alignment mechanism is advantageous in facilitating the operation of inserting the four claws 71 into the two horizontal grooves 32.

  Further, a rib 68 provided on the holder portion 67 of the tool 60 is fitted into the groove 28 provided on the outer peripheral surface 23 a of the outer cylinder 23 of the male connector main body 10. Thereby, the tool 60 is positioned with respect to the male connector 1 in the rotation direction. That is, the rib 68 configured to be fitted to the groove 28 constitutes a “rotation direction positioning mechanism” for positioning the tool 60 with respect to the male connector 1 in the rotation direction. The rotational direction positioning mechanism is advantageous for correctly positioning the tool 60 in the rotational direction with respect to the male connector 1 so that the movable parts 61 and 62 face each other in the direction in which the horizontal groove 32 extends. For this reason, the rotation direction positioning mechanism is advantageous in facilitating the operation of inserting the four claws 71 into the two horizontal grooves 32.

  As described above, the male connector 1 and the tool 60 are both rotationally symmetrical twice with respect to the central axis. Therefore, even if the tool 60 is rotated 180 degrees from FIG. 7 with respect to the male connector 1, the male connector main body 10 can be inserted into the holder portion 67 as in FIG. 8B. However, in other cases, for example, when the tool 60 is rotated 90 degrees from FIG. 7 with respect to the male connector 1, the ribs 68 are formed even if the tool 60 is coaxial with the male connector 1. Since it collides with the outer cylinder 23 of the male connector main body 10, the male connector main body 10 cannot be inserted into the holder portion 67 as shown in FIG. 8B, and the claw 71 has the same vertical position as the horizontal groove 32. Until then, the male connector 1 cannot be inserted into the tool 60. From this, the operator can know that the position of the rotation direction of the tool 60 with respect to the male connector 1 is not appropriate. For this reason, the possibility of erroneous operation of the tool 60 is reduced, and the disassembly workability of the male connector 1 is improved as a whole.

  Next, as shown in FIG. 9A, the tool 60 is deformed so that the movable parts 61 and 62 approach each other. That is, the claw 71 provided on the first movable part 61 and the claw 71 provided on the second movable part 62 are brought close to each other. As can be easily understood from FIG. 8B, the claw 71 moves in the horizontal groove 32 along the longitudinal direction of the horizontal groove 32. The tip of the claw 71 enters the gap (see FIG. 4B) between the bottom surface 32 a of the horizontal groove 32 and the engagement piece 13, and then the inclined surface 73 of the claw 71 extends in the circumferential direction of the engagement piece 13. Collide with the edge. When the movable parts 61 and 62 are further brought closer, the vertical surface 72 of the claw 71 slides on the bottom surface 32a of the horizontal groove 32, while the inclined surface 73 increases the distance between the bottom surface 32a and the engagement piece 13. Thus, the engagement piece 13 is elastically deformed outward in the radial direction.

  9B is a perspective cross-sectional view seen from below on a horizontal plane (surface passing through the claw 71 and the horizontal groove 32) including the line 9B-9B in FIG. 9A. When the claw 71 enters between the bottom surface 32a of the horizontal groove 32 and the engagement piece 13, the engagement piece 13 is elastically bent and deformed so as to be separated from the bottom surface 32a. For this reason, the protrusion 34 provided right above the horizontal groove 32 comes out of the through hole 14 provided in the engagement piece 13, and the engagement between the protrusion 34 and the engagement piece 13 is released.

  As described above, in the state in which the protrusion 34 and the engagement piece 13 are engaged, the ring 41 of the seal 40 is vertically moved by the annular protrusion 15 of the male connector body 10 and the step surface 38 of the base portion 30. (See FIG. 5A). When the engagement between the protrusion 34 and the engagement piece 13 is released, the compressive force acting on the ring 41 disappears, so the ring 41 immediately returns to its initial shape and pushes the male connector body 10 upward. . Since the locking projection 45 of the seal 40 is fitted in the locking hole 35 of the base portion 30 (see FIG. 5B), the seal 40 does not move upward together with the male connector body 10.

  Immediately after the male connector body 10 is pushed out by the seal 40, the lower end 13 b of the engagement piece 13 comes into contact with the inclined surface 34 a of the protrusion 34. The elastic force of the engagement piece 13 that the engagement piece 13 that is bent and deformed tries to return to the initial state presses the lower end 13a of the engagement piece 13 against the inclined surface 34a inward in the radial direction. For this reason, the lower end 13b of the engagement piece 13 moves upward while sliding on the inclined surface 34a.

  As described above, once the engagement between the protrusion 34 and the engagement piece 13 is released, the male connector main body 10 protrudes upward by the elastic recovery force of each of the seal 40 and the engagement piece 13. Move vigorously. This is advantageous for facilitating the disassembly work of the male connector 1.

  The male connector body 10 moves upward in the holder portion 67 of the tool 60. However, the male connector main body 10 is decelerated and stopped by the frictional force when moving in the holder portion 67. For this reason, the male connector body 10 does not jump out of the tool 60 through the holder portion 67 and the stop portion 63. Since the claw 71 is fitted in the horizontal groove 32, the relative position of the tool 60 with respect to the base portion 30 does not substantially change.

  Thereafter, the tool 60 is deformed so that the movable parts 61 and 62 are separated from each other, and the claw 71 is removed from the horizontal groove 32. When the tool 60 is raised, as shown in FIG. 10, the male connector body 10 can be separated from the base portion 30 in a state where the male connector body 10 is inserted and held in the holder portion 67 of the tool 60.

  The movable parts 61 and 62 are moved closer to each other so that the male connector body 10 inserted in the holder part 67 does not fall out of the holder part 67, and the male connector body 10 is held by the movable parts 61 and 62 and / or the claw 71. May be. For this reason, after the male connector 1 is disassembled, the separated male connector main body 10 can be stably held without being dropped from the tool 60.

  As described above, the male connector 1 can be easily disassembled by using the dedicated tool 60.

  As described above, when enteral nutrition is performed using a male connector 920 (see FIGS. 16A and 16B) compliant with ISO 80369-3, the liquid material is placed in the gap 929 between the male member 921 and the outer cylinder 923. May remain. It is difficult to wipe off and remove the liquid material in the gap 929. For this reason, the male connector 920 has the subject that it is easy to reach an unsanitary state.

  On the other hand, in this Embodiment 1, when a liquid substance remains in the gap 29, the catheter body 811 and the base portion 30 (including the seal 40) attached to the upper end of the catheter body 811 are left in the patient. Only the male connector body 10 can be removed, and the male connector body 10 can be cleaned or replaced with a new male connector body 10. Accordingly, it is possible to maintain the clean state of the male connector portion 20 that easily reaches an unsanitary state due to the liquid material remaining.

  In addition, a transgastric fistula endoscope may be used to visually confirm the indwelling state of the PEG catheter inserted into the gastric fistula of the patient. This endoscope is used by being inserted into the stomach via a PEG catheter. When the patient connector attached to the upstream end of the PEG catheter is a male connector 920 (see FIGS. 16A and 16B) conforming to ISO 80369-3, the inner diameter of the flow path 927 of the male member 921 is small. There is a problem that it is difficult to insert an endoscope in 920.

  On the other hand, in this Embodiment 1, when inserting an endoscope into the PEG catheter 800, the male connector main body 10 including the male member 21 is removed. The internal diameter of the flow path 31 of the base part 30 is larger than the internal diameter of the flow path 17 in the male member 21 (refer FIG. 5A and FIG. 5B). Accordingly, the endoscope is inserted into the proximal end portion 30 (including the seal 40) and the catheter 800 in the same manner as the endoscope is inserted into a conventional catheter in which the patient-side connector is a female connector. The insertion state of can be confirmed.

  If the tool 60 of this Embodiment 1 is used, the male connector main body 10 can be isolate | separated from the base part 30, without a finger touching the male connector main body 10. FIG. Even if the liquid material adheres to the male connector main body 10, the possibility that the liquid material adheres to the operator's finger is low. For example, even when the liquid material contains a dangerous drug, it is possible to avoid a situation where an operator is exposed to the drug.

  The above examples are merely examples, and can be changed as appropriate.

  In the above example, the rib 68 extending in parallel to the central axis 60a is provided on the inner peripheral surface of the holder portion 67 of the tool 60. However, the length of the rib 68 in the central axis 60a direction is arbitrary. In general, if a protrusion (including a rib) that can be fitted into the groove 28 of the male connector 1 is provided on the inner peripheral surface of the holder portion 67, the protrusion positions the tool 60 in the rotational direction with respect to the male connector 1. It can function as a rotating direction positioning mechanism. The protrusion is preferably provided at least at the tip of the holder portion 67 (the end closer to the claw 71) or in the vicinity thereof. Such a preferable configuration is advantageous for facilitating the operator to recognize whether or not the position of the tool 60 in the rotational direction with respect to the male connector 1 is appropriate.

  The rotational direction positioning mechanism provided in the tool 60 does not need to be the rib 68 but may be a groove extending in parallel to the central axis 60a. In this case, the outer peripheral surface 23a of the outer tube 23 of the male connector 1 can be provided with a protrusion (including a rib extending parallel to the central axis 1a) that can be fitted into the groove. However, as in the above example, providing the groove 28 on the outer peripheral surface 23a of the outer cylinder 23 results in fewer portions protruding from the outer peripheral surface of the male connector 1 than when providing a protrusion on the outer peripheral surface 23a. Therefore, it is advantageous for smoothing the outer peripheral surface of the male connector 1.

  The opening 66 (see FIGS. 6A and 6B) may not be formed in the stop portion 63 of the tool 60. This is advantageous in reliably holding the male connector body 10 that has popped out immediately after the engagement between the protrusion 34 and the engagement piece 13 in the holder portion 67.

  Or the opening 66 and the holder part 67 are omissible like the tool 160a shown to FIG. 11A. The tool 160a does not include the axis alignment mechanism and the rotation direction positioning mechanism described above. However, since both ends of the horizontal groove 32 of the male connector 1 are exposed to the outside (see FIG. 4A), it is possible to insert the claws 71 into the horizontal groove 32.

  It is preferable that the claw 71 of the tool 60 has a tapered wedge shape as a whole. The claw 71 having a tapered tip is advantageous for allowing the claw 71 to enter the gap (see FIG. 4B) between the bottom surface 32 a of the horizontal groove 32 of the male connector 1 and the engagement piece 13. The claw 71 having a wedge shape is advantageous in bending the engagement piece 13 by allowing the claw 71 to enter the gap. As long as the nail | claw 71 functions in this way, the shape of the nail | claw 71 can be changed arbitrarily.

  For example, like the tool 160b shown in FIG. 11B, the inclined surface 73b of the claw 71b may include a curved surface. In FIG. 11B, the shape of the inclined surface 73b when viewed along the central axis 60a is a curve in which the curvature gradually changes. However, the present invention is not limited to this, and any of an accurate arc having a constant curvature, an arbitrary curve, or a combination of an arbitrary curve and a straight line may be used. The curve need not be a convex curve, and may be a concave curve. Said claw 71b may be provided in the tool 160a shown to FIG. 11A.

  Or the top part of the nail | claw 71c may be chamfered like the tool 160c shown to FIG. 11C. In FIG. 11C, the top of the claw 71c is removed along a plane parallel to the main surfaces of the movable parts 61 and 62 so that the contour shape of the claw 71c when viewed along the central axis 60a is substantially trapezoidal. Has been. However, the present invention is not limited to this, and the top of the claw 71c may be chamfered to form a smooth convex curved surface. The inclined surface 73 of the claw 71c shown in FIG. 11C may be configured by the inclined surface 73b described in FIG. 11B. Said claw 71c may be provided in the tool 160a shown to FIG. 11A.

  In the present invention, the claw having the “wedge shape” includes the claw 71b and the claw 71c described above.

  In the above example, the hinges 64a and 64b as the deformable portions that can be elastically bent and deformed are configured to protrude outward, but the configuration of the deformable portions is not limited thereto.

  For example, as shown in FIG. 11D, the deformable portion may be a hinge 64d configured not to protrude outward.

  Alternatively, as shown in FIG. 11E, the deformable portion has a first hinge portion 64e-1 that connects the movable portions 61 and 62 and the stop portion 63 at the shortest distance, and a substantially “L” -shaped cross section. The hinge 64e comprised with the bent 2nd hinge part 64e-2 may be sufficient. When the first hinge part 64e-1 is bent and deformed, the bending angle of the second hinge part 64e-2 changes. Since the hinge 64e is composed of the first hinge part 64e-1 and the second hinge part 64e-2 that are deformed to be different from each other in this way, it is easy to adjust the bending rigidity of the hinge, and It may be advantageous for improving durability.

(Embodiment 2)
The tool of the second embodiment has approximately the same shape as a general tweezers. Hereinafter, the second embodiment will be described focusing on differences from the first embodiment.

  FIG. 12A is a perspective view of the tool 260 of the second embodiment, and FIG. 12B is a front view of the tool 260. The tool 260 includes a pair of movable parts 261 and 262 facing each other, a pair of extension parts 266 and 267, and a single hinge 264. The movable portions 261 and 262 and the extended portions 266 and 267 are flat plates each having a substantially rectangular main surface (surface having the largest area). Two extensions 266 and 267 are connected via a hinge 264. The extensions 266 and 267 are inclined with respect to the other side so that the distance between the first extension 266 and the second extension 267 increases as the distance from the hinge 264 increases. The first movable portion 261 is connected to the end of the first extension 266 opposite to the hinge 264, and the second movable portion 262 is connected to the end of the second extension 267 opposite to the hinge 264. The first movable part 261 and the second movable part 262 face each other. A pair of claws 71 and 71 are respectively provided on the surface (inner surface) of the first movable portion 261 facing the second movable portion 262 and the surface (inner surface) of the second movable portion 262 facing the first movable portion 261. Is provided.

  The thickness of the hinge 264 is thinner than the thickness of the movable parts 261 and 262 and the extension parts 266 and 267. The movable portions 261 and 262 and the extended portions 266 and 267 can be regarded as substantially rigid bodies, whereas the hinge 264 is relatively easily elastically bent and deformed similarly to the hinges 64a and 64b of the first embodiment. Accordingly, like the general tweezers, when the outer surface of the movable portions 261 and 262 (the surface opposite to the surface on which the claw 71 is provided) is gripped, the hinge 264 is selectively bent and deformed, and the movable portions 261 and 261 The tool 260 can be deformed so that the interval of 262 is reduced. When the distance between the movable parts 261 and 262 is reduced, the distance between the two claws 71 provided on the first movable part 261 and the two claws 71 provided on the second movable part 262 is reduced. When the gripping force applied to the movable parts 261 and 262 is released, the tool 260 is elastically returned to the initial shape. The tool 260 can be deformed so that the distance between the movable parts 261 and 262 is increased. In a natural state where no external force is applied, the first movable portion 261 and the second movable portion 262 are substantially parallel.

  Similarly to the tool 60 of the first embodiment, the tool 260 of the second embodiment can be used to disassemble the male connector 1. The male connector 1 is disassembled according to the following procedure.

  The direction of the rotation direction of the tool 260 with respect to the male connector 1 is adjusted so that the direction in which the movable portions 261 and 262 face each other is parallel to the direction in which the horizontal groove 32 of the male connector 1 extends. Next, the male connector 1 is inserted between the first movable part 261 and the second movable part 262. The four claws 71 are inserted into the two horizontal grooves 32 of the male connector 1. Next, the tool 260 is deformed so that the distance between the first movable part 261 and the second movable part 262 is reduced. The claw 71 elastically deforms the engagement piece 13 and releases the engagement between the engagement piece 13 of the male connector body 10 and the protrusion 34 of the base portion 30. Thus, the male connector body 10 is separated from the base portion 30. The male connector body 10 is held in the space between the movable parts 261 and 262 or in the space between the extension parts 266 and 267.

  As described above, similarly to the first embodiment, also in the second embodiment, the male connector 1 can be easily disassembled by using the dedicated tool 260.

  In the above example, the tool 260 includes the hinge 264 that is selectively bent and deformed, but the second embodiment is not limited to this. For example, as with some tweezers, the tool 260 can be deformed so that the distance between the movable parts 261 and 262 is reduced by elastically bending the extension parts 266 and 267 instead of the hinge 264. May be. This configuration may be considered to be substantially the same as that in which only one deformable portion that can be elastically bent and deformed is provided between the movable portions 261 and 262.

  The first movable part 261 and the first extension part 266 may extend along the same plane, and similarly, the second movable part 262 and the second extension part 267 may extend along the same plane. That is, when viewed from the side, the tool 260 may have a substantially “V” shape or a substantially “U” shape.

  Since the tool 260 of the second embodiment has a configuration similar to that of a general tweezers, the configuration is simple, and the tool 260 can be manufactured easily and at low cost.

  Since the two movable parts 261 and 262 are connected via only one deformable part (in the above example, the hinge 264) that can be elastically bent and deformed, The movable parts 261 and 262 always face each other. Therefore, the tool 260 of the second embodiment can easily disassemble the male connector 1.

  The tool 260 does not include the holder portion 67 (see FIG. 4A) provided in the tool 60 of the first embodiment. Therefore, the tool 260 of the second embodiment does not include an axis alignment mechanism and a rotation direction positioning mechanism. However, since both ends of the horizontal groove 32 are exposed to the outside, it is possible to insert the claw 71 into the horizontal groove 32.

  The second embodiment is the same as the first embodiment except for the above. The description of the first embodiment is also applied to the second embodiment.

(Embodiment 3)
The tool of Embodiment 3 has a substantially annular shape as a whole. Hereinafter, the third embodiment will be described focusing on differences from the first embodiment.

  FIG. 13A is a perspective view of the tool 360 according to the third embodiment, and FIG. 13B is a front view of the tool 360. The tool 360 includes a pair of movable parts 361, 362 facing each other, extension parts 366a, 366b, 367a, 367b, and two hinges 364a, 364b. The movable parts 361, 362 and the extension parts 366a, 366b, 367a, 367b are all flat plates having a substantially rectangular main surface (surface having the largest area). First extension portions 366 a and 366 b are connected to both ends of the first movable portion 361. The first extension portions 366a and 366b are inclined to the same side (the second movable portion 362 side) with respect to the first movable portion 361. Similarly, second extension portions 367a and 367b are connected to both ends of the second movable portion 362. The second extension portions 367a and 367b are inclined to the same side (the first movable portion 361 side) with respect to the second movable portion 362. The first extension 366a and the second extension 367a are connected via a first hinge 364a, and the first extension 366b and the second extension 367b are connected via a second hinge 364b. The extensions 366a and 367a are inclined with respect to the counterpart so that the distance between the first extension 366a and the second extension 367a increases as the distance from the first hinge 364a increases. Similarly, the extension portions 366b and 367b are inclined with respect to the counterpart so that the distance between the first extension portion 366b and the second extension portion 367b increases as the distance from the second hinge 364b increases. As shown in FIG. 13B, the tool 360 has a substantially hexagonal shape with an open center as a whole. Two hinges 364a and 364b are arranged in parallel between the movable parts 361 and 362. A pair of claws 71, 71 are provided on the surface (inner surface) of the first movable unit 361 facing the second movable unit 362 and the surface (inner surface) of the second movable unit 362 facing the first movable unit 361, respectively. Is provided.

  The extension portions 366a, 366b, 367a, 367b are thinner than the movable portions 361, 362, and the hinges 364a, 364b are thinner than the extension portions 366a, 366b, 367a, 367b. The movable parts 361 and 362 can be regarded as substantially rigid bodies, whereas the hinges 364a and 364b are relatively easily elastically bent and deformed similarly to the hinges 64a and 64b of the first embodiment. When the outer surface of the movable parts 361 and 362 (the surface opposite to the surface on which the claw 71 is provided) is gripped, the hinges 364a and 364b are elastically bent and deformed so that the distance between the movable parts 361 and 362 is reduced. Tool 360 can be deformed. At this time, the extensions 366a, 366b, 367a, 367b are also slightly elastically bent and deformed. When the distance between the movable parts 361 and 362 is reduced, the distance between the two claws 71 provided in the first movable part 361 and the two claws 71 provided in the second movable part 362 is reduced. When the gripping force applied to the movable parts 361 and 362 is released, the tool 360 is elastically returned to the initial shape. The tool 360 can be deformed so that the distance between the movable parts 361 and 362 is increased. In a natural state where no external force is applied, the first movable portion 361 and the second movable portion 362 are substantially parallel.

  Similarly to the tool 60 of the first embodiment, the tool 360 of the third embodiment can be used for disassembling the male connector 1. The male connector 1 is disassembled according to the following procedure.

  The direction of the rotation direction of the tool 360 relative to the male connector 1 is adjusted so that the direction in which the movable parts 361 and 362 face each other is parallel to the direction in which the horizontal groove 32 of the male connector 1 extends. Next, the male connector 1 is inserted between the first movable part 361 and the second movable part 362. The four claws 71 are inserted into the two horizontal grooves 32 of the male connector 1. Next, the tool 360 is deformed so that the distance between the first movable part 361 and the second movable part 362 is reduced. The claw 71 elastically deforms the engagement piece 13 and releases the engagement between the engagement piece 13 of the male connector body 10 and the protrusion 34 of the base portion 30. Thus, the male connector body 10 is separated from the base portion 30.

  As described above, similarly to the first embodiment, also in the third embodiment, the male connector 1 can be easily disassembled by using the dedicated tool 360.

  In the above example, the tool 360 includes the hinges 364a and 364b that can be easily bent and deformed, but the third embodiment is not limited to this. For example, the thickness of the hinges 364a and 364b is increased, and the extension portions 366a, 366b, 367a, and 367b are elastically bent and deformed instead of the hinges 364a and 364b, thereby reducing the interval between the movable portions 361 and 362. Thus, the tool 360 may be configured to be deformable. This configuration may be considered to be substantially the same as two deformable portions that can be elastically bent and deformed between the movable portions 361 and 362 in parallel.

  Since the tool 360 of the third embodiment has an annular shape, it is excellent in durability against repeated deformation.

  Between the two movable parts 361 and 362, two deformable parts (364a and 364b in the above example) that can be elastically bent and deformed are arranged in parallel, so that 2 regardless of the deformation state of the tool 360. The two movable parts 361 and 362 are always opposite and parallel to each other. Therefore, the tool 360 of the third embodiment makes it easier to disassemble the male connector 1.

  Similar to the tool 260 of the second embodiment, the tool 360 of the third embodiment also does not include the holder portion 67 (see FIG. 4A) provided in the tool 60 of the first embodiment. Therefore, the tool 360 of the third embodiment does not include an axis alignment mechanism and a rotation direction positioning mechanism. However, since both ends of the horizontal groove 32 are exposed to the outside, it is possible to insert the claw 71 into the horizontal groove 32.

  The third embodiment is the same as the first embodiment except for the above. The description of the first embodiment is also applied to the third embodiment.

(Embodiment 4)
The catheter 800 (see FIG. 1) provided with the male connector 1 is kept in the patient for a long time. When enteral nutrition is not performed, a removable cap (not shown) is preferably attached to the tip of the male connector 1. The cap can be configured to be able to close the opening of the flow path 17 and the opening of the outer cylinder 23 of the male member 21. Wearing a cap on the male connector 1 is advantageous for preventing the patient's stomach contents from flowing backward, in addition to maintaining good hygiene of the male connector 1.

  As described above, when the male connector main body 10 is removed from the base portion 30 using the tool of the present invention, the first flow path 801 of the catheter main body 811 is communicated with the outside world. For this reason, the situation where the contents of a patient's stomach reversely flow can occur. The tool of the fourth embodiment includes a clamp that prevents this.

  FIG. 14A is a perspective view of a tool 60 with a clamp 80 according to the fourth embodiment, and FIG. 14B is a perspective view of the tool 60 with a clamp 80 as seen from another direction.

  The clamp 80 has a substantially rectangular thin plate shape, and a linear notch (slit) 81 is formed on one side thereof. The material of the clamp 80 is not limited, but is preferably a hard material (hard material) having a mechanical strength (rigidity) that does not substantially deform due to an external force. For example, a resin material such as polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), hard polyvinyl chloride, or a metal material such as stainless steel or aluminum can be used.

  A flexible string 87 connects the clamp 80 and the tool 60 of the first embodiment. In this example, one end of the string 87 is fixed to the stop portion 63 of the tool 60, but may be fixed to another part of the tool 60.

  The tool 60 with a clamp 80 according to the fourth embodiment is used as follows.

  Prior to disassembling the male connector 1, the catheter body 811 (see FIG. 1) is inserted into the slit 81 of the clamp 80. The width of the slit 81 is smaller than the outer diameter of the catheter body 811. For this reason, the catheter body 811 is compressed and deformed in the diametrical direction by the clamp 80, and the flow path in the catheter body 811 (particularly, the first flow path 801 communicating with the male connector 1) is closed. Next, the male connector body 10 is separated from the base 30 in the same manner as described in the first embodiment using the tool 60. Next, the alternative male connector body 10 is attached to the base portion 30. The above-described cap is preferably attached to the tip of the male connector body 10. Finally, the clamp 80 is removed from the catheter body 811 and the flow path in the catheter body 811 is opened.

  As described above, according to the fourth embodiment, the male connector main body 10 is detached from the base portion 30 with the flow path in the catheter main body 811 closed. Therefore, by removing the male connector main body 10 from the base portion 30, it is possible to prevent the occurrence of a situation in which the contents of the patient's stomach reversely flow through the flow path in the catheter main body 811.

  The clamp 80 is connected to the tool 60 via a string 87. This is advantageous in preventing the clamp 80 from being lost. Moreover, since the operator who disassembles the male connector 1 using the tool 60 easily notices the clamp 80, he / she performs an erroneous operation of disassembling the male connector 1 without closing the flow path of the catheter body 811 with the clamp 80. It is advantageous to reduce the possibility.

  The configuration of the clamp 80 is not limited to the above example. If the flow path in the catheter body 810 can be closed, the configuration is arbitrary. Any clamp that can open and close the flow path in the flexible tube can be used. The clamp may have a portion that can be elastically deformed, or has a lock mechanism (for example, an engagement structure, a screwing structure, etc.) for maintaining a state in which the flow path in the catheter body 810 is closed. You may do it.

  A member (connecting member) that connects the clamp 80 and the tool 60 is not limited to the string 87. For example, an arbitrary member such as a thread, a band, or a chain can be used. The material of the connecting member is also arbitrary such as resin, rubber, metal. The connecting member preferably has flexibility (flexibility) that can be arbitrarily deformed. Further, the connecting member may be extendable. The connecting member may be detachable from one or both of the tool 60 and the clamp 80. The connecting member may be omitted, and the tool 60 and the clamp 80 may be independent members. In this case, the clamp 80 can be attached to and detached from the tool 60. When the tool 60 is not used, the clamp 80 is attached to the tool 60. When the tool 60 is used, the clamp 80 is separated from the tool 60. It may be configured to be able to.

  In the above example, the clamp is provided in the tool 60 of the first embodiment, but the clamp of the fourth embodiment may be provided in any other tool of the present invention.

  The above first to fourth embodiments are merely examples. The present invention is not limited to Embodiments 1 to 4 above, and can be modified as appropriate.

  The structure of the male connector 1 is not limited to said Embodiment 1-4.

  In the above-described embodiment, the engagement piece 13 having the through hole 14 is provided in the male connector body 10 as the engagement structure of the male connector body 10 and the base portion 30 that are engaged with each other, and the protrusion 34 is the base. The unit 30 was provided. A recess provided on the inner peripheral surface (surface facing the central axis 1a) of the engagement piece 13 so that the engagement structure of the male connector body 10 can be inserted into the protrusion 34 instead of the through hole 14. It may be. Alternatively, as the engagement structure, a protrusion may be provided on the male connector main body 10 (particularly, the inner peripheral surface of the engagement piece 13), and a recess in which the protrusion is fitted may be provided on the base portion 30.

  In the above embodiment, the male connector body 10 includes the two engagement pieces 13, but the male connector body 10 may include only one engagement piece 13.

  In the above embodiment, the engagement piece 13 is provided in the male connector body 10, but the engagement piece 13 may be provided in the base portion 30. In this case, the vertical groove 33 into which the engagement piece 13 is inserted and the horizontal groove 32 that guides the claw 71 of the tool can be provided on the outer peripheral surface of the male connector body 10.

  In said embodiment, although the male connector part 20 of the male connector main body 10 was comprised based on ISO80369-3, the male connector part 20 may have a structure other than this.

  The PEG catheter provided with the male connector 1 is not limited to the balloon tube type. For example, instead of the balloon 809, the catheter may be a bumper tube type having a bumper that is relatively difficult to deform. Alternatively, the male connector 1 may be provided at the upstream end of a tube connected to a so-called button-type PEG catheter where the catheter is not substantially led out of the patient's body. Further, the male connector 1 may be provided not on a PEG catheter but on an arbitrary catheter used for enteral nutrition such as a nasal catheter. The male connector 1 may be provided in an extension tube (for example, enteral nutrition set) connected to the catheter, not a catheter placed in the patient.

  The configuration of the tool is not limited to the first to fourth embodiments.

  The number of claws 71 provided in the tool is not limited to four. For example, the number of claws 71 may be the same as the number of engaging pieces 13 provided in the male connector 1 so as to correspond one-to-one with the engaging pieces 13. In this case, the claw 71 can be provided only in one of a pair of opposed movable parts. When disassembling the male connector 1, the other of the opposing pair of movable parts is brought into contact with the outer peripheral surface of the male connector 1. However, as in the above-described embodiment, elastically deforming one engagement piece 13 with the two claws 71 can easily and reliably deform the engagement piece 13, so a male connector using a tool This is advantageous in improving the reliability of the operation of disassembling.

  Although this invention does not have a restriction | limiting, It can utilize as a tool which decomposes | disassembles the male connector used in order to comprise the flow path through which a liquid substance flows, and the said male connector. The present invention can be preferably used in medicine, particularly enteral nutrition, but is not limited thereto, and can also be used in fields such as food and chemistry.

DESCRIPTION OF SYMBOLS 1 Male connector 1a Center axis 10 of a male connector Male connector main body 13 Engagement piece 14 Through-hole (engagement structure of a male connector main body)
17 Channel 21 Male member 23 Outer cylinder 25 Female thread 30 Base part 33 Vertical groove (concave part)
34 Protrusion (base part engagement structure)
40 Seal 60, 160a, 160b, 160c, 160d, 160e, 260, 360 Tool 61, 261, 361 First movable part 62, 262, 362 Second movable part 64a, 64b, 64d, 64e, 264, 364a, 364b Hinge (Deformable part)
67 Holder (axis alignment mechanism)
68 Rib (Rotation direction positioning mechanism)
71, 71b, 71c Claw 80 Clamp 800 Catheter 801 First flow path

Claims (19)

A male connector disassembling tool used for disassembling a male connector having a male connector body mounted on a base portion so that the male connector main body is separated from the base portion,
Each of the base part and the male connector body includes an engagement structure that engages with each other when the male connector body is mounted on the base part,
The engagement structure of one of the base part and the male connector main body is provided on an elastically deformable engagement piece,
The tool includes a wedge-shaped claw provided on a surface facing the other of at least one of the first movable portion and the second movable portion facing each other and the first movable portion and the second movable portion. And
The tool is elastically deformable such that a distance between the first movable part and the second movable part changes;
A distance between the first movable part and the second movable part when the male connector with the male connector body mounted on the base part is inserted between the first movable part and the second movable part. When the tool is deformed so as to be reduced, the claw enters between the base portion and the male connector body, elastically deforms the engagement piece, and releases the engagement of the engagement structure. A tool for disassembling a male connector, characterized in that it is configured so that   2. The male connector disassembling tool according to claim 1, wherein the claw elastically deforms the engaging piece so that the engaging piece is separated from a central axis of the male connector. Each of the first movable part and the second movable part includes the claw,
The male connector disassembling tool according to claim 1 or 2, wherein the claw of the first movable part and the claw of the second movable part are configured to elastically deform a common engagement piece.   The male connector disassembly as described in any one of Claims 1-3 provided with the holder part by which the said male connector main body is inserted when the said male connector is inserted between the said 1st movable part and the said 2nd movable part. Tools.   The male connector for disassembling according to claim 4, wherein the male connector main body is configured not to be inserted between the base portion and the male connector main body unless the male connector main body is inserted into the holder portion. tool.   When the tool is not in a predetermined position in the direction around the central axis with respect to the male connector, the holder portion prevents the claw from entering between the base portion and the male connector body. The male connector disassembly tool according to claim 4 or 5, wherein the male connector disassembly tool is configured.   The male connector disassembling tool according to any one of claims 4 to 6, wherein the holder portion is configured to be able to hold the male connector main body separated from the base portion.   The male connector disassembling tool according to any one of claims 1 to 7, further comprising an axis alignment mechanism that aligns the tool so as to be coaxial with the male connector.   The male connector disassembling tool according to any one of claims 1 to 8, further comprising a rotation direction positioning mechanism that positions the tool in a direction around a central axis with respect to the male connector.   The male connector disassembling tool according to any one of claims 1 to 9, further comprising a clamp capable of closing a flow path in a catheter to which the male connector is attached.   The male connector disassembly as described in any one of Claims 1-10 to which the said 1st movable part and the said 2nd movable part are connected via the at least 1 deformable part which can be bent and deformed elastically. Tools. The at least one deformable portion comprises two deformable portions;
The male connector disassembling tool according to claim 11, wherein the two deformable parts are arranged in series between the first movable part and the second movable part.   The male connector disassembling tool according to claim 11, wherein the at least one deformable portion includes only one deformable portion. The at least one deformable portion comprises two deformable portions;
The male connector disassembling tool according to claim 11, wherein the two deformable parts are arranged in parallel between the first movable part and the second movable part. A male connector comprising a base part and a male connector body detachable from the base part,
Each of the base part and the male connector body includes an engagement structure that engages with each other when the male connector body is mounted on the base part,
The engagement structure of one of the base part and the male connector main body is provided on an elastically deformable engagement piece,
The engagement piece fits into a recess provided on the other of the base part and the male connector body,
When the engagement piece is elastically deformed, the engagement of the engagement structure is released, and the male connector main body can be separated from the base portion.   The male connector according to claim 15, wherein the engagement structure of the other of the base part and the male connector main body is provided in the recess.   The male of Claim 15 or 16 comprised so that engagement of the said engagement structure may be cancelled | released if the said engagement piece is elastically deformed so that the said engagement piece may leave | separate from the center axis | shaft of the said male connector. connector. A seal disposed between the base and the male connector body;
The seal is compressed and deformed in a central axis direction of the male connector when the engagement structure of the base portion and the engagement structure of the male connector main body are engaged. The male connector according to one item.   The male connector body includes a rod-shaped male member provided with a flow path along a central axis, an outer cylinder that surrounds the male member coaxially with the male member, and an inner circumference that faces the male member of the outer cylinder The male connector as described in any one of Claims 15-18 provided with the internal thread provided in the surface.

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