JP3125030U - Port cap for purifier - Google Patents

Abstract

An object of the present invention is to provide a port cap for a purifier that can seal a liquid port and cover an outer peripheral portion, can be easily attached / detached and can be securely attached, and can use a small amount of material.
A synthetic resin port cap 20 that covers liquid ports 13 and 14 projecting from a purifier case and can be inserted into the liquid ports 13 and 14 from one end opening to cover the outer periphery of the liquid port. A cylindrical portion 21 and a ceiling portion 22 formed on the opposite side of the opening end of the cylindrical portion 21, and the inner surface of the ceiling portion 22 is fitted and sealed in the openings of the liquid ports 13 and 14. The plug portion 23 was formed, and the cylinder portion 21 was formed with an engagement portion 24 that could be engaged in the groove 17 formed on the outer periphery of the liquid ports 13 and 14.
[Selection] Figure 7

Description

  The present invention relates to a synthetic resin port cap that covers a liquid port of a medical purifier such as an artificial dialysis purifier used for blood purification.

  In an artificial dialysis purifier used for blood purification, cap members each having a supply port or a discharge port for a liquid to be treated are attached to both ends of a cylindrical case in which a hollow fiber membrane is loaded, and both ends of an outer peripheral portion of the case A liquid port serving as an inlet or outlet for the processing liquid is provided in the vicinity. The purifier is supplied with a liquid to be treated, such as blood, from a supply port at one end, and is purified with a treatment liquid outside the hollow fiber membrane, such as dialysate, when the blood passes through the hollow fiber membrane. Is discharged from the discharge port, and the processing liquid flows out from the liquid port.

  Such purifiers are classified into a wet type that is shipped with water or an aqueous solution filled in the case and a dry type that is not filled with water. In the case of the wet type, a liquid port that protrudes from the case. It is necessary to put a port cap on and seal water or an aqueous solution. For this reason, a cap is used, and this cap comprises a circular holding portion and a mounting portion that protrudes from the central portion of the lower surface and has a circular rib on the outer periphery, and has a recessed portion opened on the bottom surface. It is sealed by inserting the part into the inner peripheral surface of the liquid port (Patent Document 1). With this cap, the liquid port can be sealed, but the outer periphery of the liquid port is exposed to the outside, and there is a risk of contamination when hands or fingers come into contact with the liquid port when the cap is attached or detached, preventing contamination. Therefore, further cleaning is desired.

Therefore, as a plug body that can also cover the outer peripheral part of the liquid port, a cylindrical sealing body is integrally formed on the back surface of the top plate of the cylindrical body that is covered by the liquid port, and on the inner peripheral surface of the cylindrical body. A groove is formed, and a convex line that enters the groove is formed in the liquid port. The stopper is covered with the liquid port, and a cylindrical sealing body is inserted on the inner peripheral surface of the liquid port. The liquid port ridges are inserted and fixed (Patent Document 2) and the housing is divided into two parts via hinges to the sealing member, and the sealing member is inserted into the inner peripheral surface of the liquid port. There is one that rotates two housings around a hinge to cover a liquid port (Patent Document 3).
JP-A-7-275356 JP 2002-172161 A JP 2005-192788 A

  In the plug body that can cover the outer periphery of the liquid port, a concave groove is formed in order to fix the plug body, and it is fixed by screwing into the ridge of the liquid port. The main dimensions of the liquid port are defined in JIST3250 (2005), and it is necessary to secure the length for forming the fixing ridges separately from the length necessary for connection, and the liquid port itself is lengthened. However, it is necessary to lengthen the plug body as much as the concave groove is formed, and there is a problem that the purifier itself becomes large and the amount of material used increases.

Further, in the case of having a hinge-structured housing, the hinge part is weaker than other parts and may be damaged during transportation, and the operation of inserting / removing the sealing member during attachment / detachment and the operation of opening / closing the housing There is a problem that two operations are required and the operation is complicated.
Furthermore, since any of these covers the liquid port at the same time as the liquid port is sealed, if water or an aqueous solution remains between the plug and the liquid port at the time of manufacture, there is a risk that germs may be generated. There's a problem.

  The present invention has been made in view of the above circumstances, and its purpose is to be able to seal the liquid port, cover the outer periphery, hold the attached state easily and securely, and use The present invention is intended to provide a purifier port cap that requires only a small amount of material.

  The present invention has been proposed in order to achieve the above-mentioned object, and what is described in claim 1 is a synthetic resin that covers a liquid port protruding from a purifier case in which a hollow fiber membrane is loaded. A port cap made of a cylinder, the port cap being inserted into the liquid port from one end opening and covering the outer periphery of the liquid port, and a ceiling formed on the opposite side of the opening end of the cylindrical portion A plug portion that fits and seals in the opening of the liquid port is formed on the inner surface of the ceiling portion, and the cylindrical portion can be engaged in a concave groove formed on the outer periphery of the liquid port. The purifier port cap is characterized in that a simple engaging portion is formed.

  According to a second aspect of the present invention, a pair of engaging portions are provided at positions opposite to the cylindrical portion, and elongated slits are formed on both sides of each engaging portion along the axial direction of the cylindrical portion. Item 2. The purifier port cap according to Item 1.

  According to a third aspect of the present invention, there is provided the purifier port cap according to the first or second aspect, wherein a through-hole is formed outside the plug portion in the ceiling portion.

  According to a fourth aspect of the present invention, there is provided the purifier port cap according to the third aspect, wherein the through hole is a plurality of arc-shaped slits concentrically formed with the plug portion.

  The purifier port cap according to any one of claims 1 to 4, wherein a flange portion protruding outward from the cylindrical portion is provided on the ceiling portion side of the cylindrical portion. It is.

According to the present invention, the following excellent effects can be obtained.
According to the first aspect of the present invention, a synthetic resin port cap is placed over a liquid port projecting from a purifier case having a hollow fiber membrane loaded therein, and the port cap extends from one end opening. A cylindrical portion that can be inserted into the liquid port to cover the outer periphery of the liquid port; and a ceiling portion that is formed on the opposite side of the opening end of the cylindrical portion. A plug portion that fits and seals inside is formed, and an engagement portion that can be engaged in a recessed groove formed on the outer periphery of the liquid port is formed on the tube portion. While being able to seal by fitting in the opening of a port, the outer periphery of a liquid port can be covered with a cylinder part. In addition, by engaging the engaging portion in the concave groove of the liquid port, the sealed state can be reliably maintained without lengthening the cylindrical portion, and the material used can be reduced as much as possible. It does not enlarge itself.

  According to the second aspect of the present invention, since a pair of engaging portions are provided at opposite positions of the cylindrical portion and elongated slits are formed on both sides of each engaging portion along the axial direction of the cylindrical portion, The engaging portion can be easily elastically deformed, and the liquid port can be easily attached to and detached from the concave groove. Further, by pressing the cylindrical portion orthogonal to the pair of engaging portions with a finger, the engaging portion can be deformed so as to spread outward, and can be removed more easily. In addition, the slit facilitates the deformation at the time of demolding in the molding with the synthetic resin, and facilitates demolding.

  According to the third aspect of the present invention, since the through hole is opened outside the plug part in the ceiling part, the elastic deformation of the plug part is facilitated, and the fitting of the plug part to the liquid port is facilitated. Adhesion and sealing properties can be improved, and removal is easy.

  According to the fourth aspect of the present invention, since the through hole is configured by a plurality of arc-shaped slits concentrically formed with the plug portion, by blowing air from each of the plurality of arc-shaped slits on the concentric circle, After the purifier is filled with water or an aqueous solution and the port cap is attached, the remaining water or aqueous solution can be removed by blowing away, and propagation of germs and the like can be prevented. Moreover, the plug portion can be elastically deformed evenly, and the fitting operability and the sealing performance can be further improved.

  Since the thing of Claim 5 provided the collar part which protruded outside the cylinder part on the ceiling part side of the cylinder part, when removing it, it is made to pinch with a thumb and an index finger on both sides of a cylinder part, By hooking the middle finger on the buttocks, it can be easily pulled out and handled easily.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic sectional view of a part of an example of a purifier having a liquid port in which a purifier port cap is used, FIG. 2 is a front view of the purifier port cap, FIG. 3 is a plan view, and FIG. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 2, FIG. 6 is a cross-sectional view taken along the line CC in FIG. 3, and FIG.

  As a purifier having a liquid port in which the purifier port cap is used, for example, there is an artificial dialysis purifier 1 for purifying blood shown in FIG. 1, and a large number of hollows are provided in a cylindrical casing (case) 2. Supplying a hollow fiber bundle 5 configured by bundling yarns (hollow fiber membranes) 3 and introducing a liquid to be treated (for example, blood) into one end (left end in the figure) of the cylindrical casing 2 A cap member 7 protruding from the mouth 6 is screwed and attached, and a cap member 9 protruding from the other end (right end in the figure) is provided with a discharge port 8 through which processed blood flows out. ing. Further, potting portions 10 for fixing the ends of the hollow fiber bundle 5 to the inner surface of the cylindrical casing 2 with a resin composition such as polyurethane resin are provided at both ends in the cylindrical casing 2 and sealed. The space in the mold casing 2 is divided into a liquid space to be processed (the inside of each hollow fiber) through which the liquid to be processed passes and a processing liquid space (the outside of each hollow fiber) through which the processing liquid passes. Further, a liquid port 13 serving as an inlet for a treatment liquid (for example, dialysate) to be purified and a liquid port 14 serving as an outlet are provided in the vicinity of both ends of the outer periphery of the cylindrical casing 2 and supplied from the supply port 6. The liquid to be treated such as blood is purified by a treatment liquid such as dialysate injected from the inlet 13 through the hollow fiber 3.

  In such an artificial dialysis purifier 1, the supply port 6 and the discharge port 8 are sealed with caps that are conventionally known, and the liquid port 13 and the liquid port 14 are provided for the purifier according to the present invention. Port cap 20 is attached and sealed to prevent leakage during sterilization and transportation storage with water or aqueous solution (for example, physiological saline) entering the outside of the hollow fiber bundle 5 in the casing 2 sealed. To do.

  The liquid ports 13 and 14 that serve as water or aqueous solution inlets or outlets are sized in accordance with the provisions of JIST3250 (2005), and are formed in a substantially cylindrical shape as shown in FIGS. Each liquid port 13, 14 includes a cylindrical wall 15, a small-diameter portion 16 is formed at the tip thereof, and a liquid is provided on the shoulder between the cylindrical wall 15 and the small-diameter portion 16 during use (during dialysis). The O-ring of the one-touch coupler connected to the ports 13 and 14 is in contact and sealed. In addition, an annular groove 17 is formed on the outer periphery on the base end side of the liquid ports 13 and 14, and the diameter of the cylindrical wall 15 which is the diameter of the port is within 14.9 mm, and the length of the port The length of the cylindrical wall 15 portion from the tip of a certain small diameter portion 16 is defined to be 22 mm or more beyond the concave groove 17.

  The port cap 20 that covers the liquid ports 13 and 14 of such a purifier 1 and seals water or an aqueous solution is made of a synthetic resin, and is inserted into the liquid ports 13 and 14 from one end opening, and the outer periphery of the liquid ports 13 and 14. And a ceiling portion 22 formed on the side opposite to the opening end of the cylinder portion 21, and the inner surface of the ceiling portion 22 is formed from the openings of the liquid ports 13 and 14. A plug portion 23 is formed to be fitted and sealed around the periphery. The cylindrical portion 21 is formed with an engaging portion 24 that can be engaged in a recessed groove 17 formed on the outer periphery of the liquid ports 13 and 14 so as to protrude inward in a substantially arcuate shape. Examples of the synthetic resin used for the port cap 20 include polyethylene, polypropylene, polycarbonate, polystyrene, polyamide, polyacetal and the like, and polyethylene and polypropylene are preferable from the viewpoint of sealing properties and moldability.

  In the purifier port cap 20, the cylindrical portion 21 is formed in a cylindrical shape having a slightly larger inner diameter corresponding to the outer diameter of the cylindrical wall 15 of the liquid ports 13 and 14, and has a length that can cover the liquid ports 13 and 14. is there. A plate-like ceiling portion 22 is integrally formed on the side opposite to the opening end (lower end in the figure) of the cylindrical portion 21, and a cylindrical plug portion concentrically with the cylindrical portion 21 on the inner surface of the ceiling portion 22. 23 has an outer diameter that protrudes toward the opening end and can be fitted and sealed to the inner periphery of the liquid ports 13 and 14, and the outer periphery of the tip is formed in an arc shape to facilitate fitting. An inner annular groove 25 having a depth with which the small diameter portion 16 at the tip of the liquid ports 13 and 14 is abutted is formed on the inner surface of the ceiling portion 22 of the base end portion of the plug portion 23. The effective length that fits and seals the liquid ports 13 and 14 is the protruding length from the bottom of the inner annular groove 25.

  Further, an outer annular groove 26 is formed on the outer surface of the ceiling portion 22 concentrically with the inner annular groove 25 and outside thereof, and an arcuate slit 27 is formed as a through hole at the bottom of the outer annular groove 26 in the circumferential direction or the like. A plurality of, in the illustrated example, four slits 27 are formed at intervals of one-eighth of the circumference, and penetrate the inside and outside of the ceiling portion 22 and communicate with the inside of the tube portion 21.

  By forming the inner annular groove 25 and the outer annular groove 26 of the ceiling part 22 on the outer side of the plug part 23, the elastic deformation of the plug part 23 is facilitated, and the sealing performance to the liquid ports 13 and 14 can be improved. In addition, the operability of fitting and removing can be improved. Further, in the crowned state attached to the liquid ports 13, 14, air was blown using the slit 27 penetrating the bottom of the outer annular groove 26 to remain between the liquid ports 13, 14 and the cylindrical portion 21. Water and aqueous solutions can be removed easily and reliably, and propagation of various germs can be prevented. The through hole is not limited to the slit, and may be a circular small hole, for example.

  In this purifier port cap 20, in order to hold the liquid ports 13 and 14 in a state of being crowned, a pair of engaging portions 24 are formed at opposite positions of the cylindrical portion 21 so as to protrude in a substantially arcuate shape, It is a curved surface corresponding to the shape of the concave groove 17 of the liquid ports 13, 14, and in a crowned state, as shown in FIG. 7, the pair of engaging portions 24 are in close contact with the concave groove 17 and sandwiched from both sides Fixed.

  Furthermore, on both sides of each engaging portion 24, elongated slits 28 are formed along the axial direction of the cylindrical portion 21, thereby facilitating elastic deformation when the engaging portions 24 are attached and detached, Demolding can be easily performed during molding with a synthetic resin. Further, when the purifier port cap 20 is removed from the liquid ports 13 and 14 by the slit 28, the portions rotated by 90 degrees with respect to the pair of engaging portions 24 (intermediate portions between the engaging portions 24) are viewed from both sides. By pushing, the portions of the respective slits 28 are expanded, and the cylindrical portion 21 is deformed from a circular shape to an elliptical shape, so that the engaging portion 24 is also expanded and can be removed more easily.

  Further, in the purifier port cap 20, a flange portion 29 is integrally provided on the ceiling portion 22 side of the cylinder portion 21 so as to protrude outward from the cylinder portion 21, and has a pair of engagements with the same thickness as the ceiling portion 22. It forms so that the joint part 24 side may protrude largely. By this hook part 29, the middle part of the engaging parts 24 is sandwiched between the thumb and forefinger from both sides, and the middle finger is pulled so as to be hooked on the hook part 29, thereby cooperating with the previously described expansion of the slit 28. It can be removed more easily.

  For example, the purifier port cap 20 is filled with water or an aqueous solution outside the hollow fiber 3 (hollow fiber membrane) loaded in the cylindrical casing 2 of the artificial dialysis purifier 1, and then the liquid ports 13 and 14. The cylindrical portion 21 of the purifier port cap 20 is covered from the opening end, and the plug portion 23 is positioned in the opening of the liquid ports 13 and 14 and then pushed in. Then, the purifier port cap 20 is further pushed in so that the pair of engaging portions 24 are engaged with the concave grooves 17 of the liquid ports 13 and 14 to complete the attachment (plugging).

At this time, since the concave grooves 17 are formed in the liquid ports 13 and 14 in an annular shape, the liquid ports 13 and 14 may be pushed in regardless of the positions of the pair of engaging portions 24 of the purifier port cap 20. The liquid ports 13 and 14 can be easily attached without touching them with fingers or hands.
In the state where the purifier port cap 20 is pushed into the liquid ports 13 and 14 and attached, the plug portion 23 is easily elastically deformed by the inner annular groove 25 and the outer annular groove 26 and is tightly sealed to the liquid ports 13 and 14. While being able to be in a state, the engaging part 24 is firmly engaged with the concave groove 17 so that the sealed state is reliably maintained.

  After attaching the purifier port cap 20 in this way, when water or an aqueous solution adheres between the liquid ports 13 and 14, by blowing air from the slit 27 penetrating the bottom of the outer annular groove 26, After easily removing water or an aqueous solution, the artificial dialysis purifier 1 is sterilized, transported or stored. At the time of sterilization or transportation and storage, the purifier port cap 20 is firmly engaged, the sealed state is maintained, and leakage of water or aqueous solution can be completely prevented, and there is no remaining water or aqueous solution. It is possible to prevent germs and the like from being generated.

  On the other hand, when the artificial dialysis purifier 1 is used, the purifier port caps 20 of the liquid ports 13 and 14 are removed. In this case, the intermediate portions of the pair of engaging portions 24 of the cylindrical portion 21 are disposed on both sides. The engaging portion 24 can be deformed so as to be spread outward by being pulled out so that it can be pressed, and can be easily removed without requiring a large force. Then, by connecting a one-touch coupler equipped with an O-ring to the liquid ports 13 and 14, the O-ring is in contact with the shoulder between the cylindrical wall 15 and the small diameter portion 16 of the liquid ports 13 and 14 in a sealed state. Can be easily prepared for artificial dialysis.

  According to such a purifier port cap 20, the inner annular groove 25 and the outer annular groove 26 are formed in the ceiling portion 22, and the slit 27 as a through hole is formed in the outer annular groove 26. The elastic deformation of the resin can be promoted, and at the same time, the amount of the synthetic resin material used can be reduced. In addition, the slits 28 on both sides of the engaging portion 24 of the cylindrical portion 21 can promote the elastic deformation of the engaging portion 24 and can further reduce the amount of the synthetic resin material used.

  In addition, since the engaging part 24 is provided in the intermediate part of the cylinder part 21, the concave groove 17 of the liquid ports 13 and 14 can also be formed in the intermediate part of the cylindrical wall 15, thereby the liquid port 13, The usage fee for the amount of the synthetic resin material 14 itself can be reduced, and the material used for the purifier can also be reduced.

  In the above embodiment, the liquid port of the artificial dialysis purifier has been described as an example of the purifier. However, the present invention is not limited to this, and can be widely applied to other purifiers in which a hollow fiber membrane is loaded. . Moreover, it can be used not only for the wet type but also for the dry type.

  Further, in the above-described embodiment, the engaging portions are paired and arranged to face each other. However, it is sufficient that at least one engaging portion is formed, and three or more can be arranged at equal intervals around the circumference. What is necessary is just to determine suitably by such. Furthermore, although slits along the axial direction are formed on both sides of the engaging portion to facilitate elastic deformation and easy removal, the slits may be omitted.

  In the above embodiment, four slits as through-holes are formed at equal circumferential intervals. However, the present invention is not limited to this, and the number of slits may be reduced or increased. It is only necessary that water or an aqueous solution adhering to the cap can be blown off with air.

It is the schematic sectional drawing which fractured | ruptured a part of example of a purifier provided with the liquid port for which the port cap for purifiers is used. It is a front view of the port cap for purifiers. It is a top view of the port cap for purifiers. It is a center longitudinal cross-sectional view of the port cap for purifiers. It is BB sectional drawing in FIG. 2 of the port cap for purifiers. It is CC sectional drawing in FIG. 3 of the port cap for purifiers. It is a longitudinal cross-sectional view of the state which attached the port cap for purifiers to the liquid port.

Explanation of symbols

1 Purifier for artificial dialysis 2 Cylindrical casing (case)
3 Hollow fiber (hollow fiber membrane)
DESCRIPTION OF SYMBOLS 5 Hollow fiber bundle 6 Supply port 7 Cap member 8 Discharge port 9 Cap member 10 Bottling part 13 Liquid port 14 Liquid port 15 Cylindrical wall 16 Small diameter part 17 Groove 20 Purifier port cap 21 Cylindrical part 22 Ceiling part 23 Plug part 24 Engaging portion 25 Inner annular groove 26 Outer annular groove 27 Slit (through hole)
28 Slit 29 Buttocks

Claims (5)

A synthetic resin port cap that covers a liquid port protruding from a purifier case loaded with a hollow fiber membrane inside,
The port cap includes a cylindrical portion that can be inserted into the liquid port from one end opening to cover the outer periphery of the liquid port, and a ceiling portion that is formed on the side opposite to the opening end of the cylindrical portion,
On the inner surface of the ceiling portion, a plug portion that fits and seals in the opening of the liquid port is formed, and on the cylinder portion, an engagement portion that can be engaged in a concave groove formed on the outer periphery of the liquid port A port cap for a purifier, characterized in that it is formed.   2. The purifier port cap according to claim 1, wherein a pair of engaging portions are provided at positions opposed to the cylindrical portion, and elongated slits are formed on both sides of each engaging portion along the axial direction of the cylindrical portion. .   The purifier port cap according to claim 1 or 2, wherein a through-hole is formed in the ceiling portion outside the plug portion.   The purifier port cap according to claim 3, wherein a plurality of the through holes are arc-shaped slits concentrically formed with the plug portion. The purifier port cap according to any one of claims 1 to 4, wherein a flange portion protruding outward from the cylindrical portion is provided on a ceiling portion side of the cylindrical portion.

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