JP3020188U - Hollow fiber membrane module elastic cap - Google Patents

Abstract

(57) [Summary] [Object] To provide an elastic cap for a hollow fiber membrane module, which has high liquid leakage prevention property, is easy to insert and remove, and is easy to handle. An elastic cap is formed by integrally forming a flat head portion 1, a cylindrical portion 2 having a smaller diameter than the head portion, and a tip portion 3, and the cylindrical portion 2 has a plurality of protrusions along its outer circumference. -Shaped ribs 4 are formed, the tip portion 3 has an inclination of 45 degrees or less, and the diameter is gradually reduced, and there is no step between the tip portion 3 and the cylindrical portion 2. An elastic cap for the hollow fiber membrane module.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a plug (cap) of a hollow fiber membrane module that constitutes a main part of a device for extracorporeal circulation treatment such as an artificial kidney, a plasma exchange device, and an artificial lung.

[0002]

[Prior art]

 The so-called hollow fiber membrane module used in artificial kidneys, plasma exchange devices, etc., is a hollow fiber aggregate filled in a container having an inlet and an outlet, and there is no particular limitation on the outer shape of the container or the shape of the hollow fiber aggregate. Absent. In general, these hollow fiber membrane modules are filled with sterile water such as distilled water and physiological saline after manufacturing, fitted with elastic caps at the inlet and outlet, and then sent to sterilization processes such as high-pressure steam sterilization and radiation sterilization. To be Therefore, the conventional elastic cap has been designed so that it can be tightly sealed so as not to accidentally come off during the transportation through these steps to cause liquid leakage. For example, in the cap of Japanese Utility Model Laid-Open No. 4-3750 shown in FIG. 5, the tip portion 6 is formed in a curved shape so that the cap can be smoothly inserted into the body to be plugged, and it is caused by the temperature rise during sterilization. Disclosed is an elastic cap having a plurality of recessed groove portions in the sealing portion 7 and a large diameter portion 8 having a flange portion 9 capable of crimping the plugged body portion from the outer periphery so that the cap does not come off due to an increase in module internal pressure. Has been done. However, instead of improving the sealing performance, the cap with the collar has a new problem that when the machine is plugged into the module main body, the collar itself is rolled and the plugging is apt to occur. The problem that it is difficult to remove the cap has not been solved yet.

[0003]

[Problems to be solved by the device]

 The present invention provides a cap for a hollow fiber membrane module that has a high liquid leakage prevention property, is easy to insert and remove, and is easy to handle.

[0004]

[Means for Solving the Problems]

 The present invention is an elastic cap in which a flat plate-shaped head 1, a cylindrical portion 2 having a diameter smaller than that of the head, and a tip portion 3 are integrally formed. The convex ribs 4 are formed, the tip 3 has an inclination of 45 degrees or less, and the diameter gradually decreases, and there is no step between the tip 3 and the cylindrical portion 2. The elastic cap of the hollow fiber membrane module which is a feature, and further the elastic cap of the hollow fiber membrane module in which the concave groove portion 5 is provided inside the cylindrical portion 2. The elastic cap of the present invention is made of a thermoplastic elastomer resin such as styrene elastomer, polyolefin elastomer, polyester elastomer, polyurethane elastomer, or synthetic rubber, and has a flat head 1 and a cylinder having a diameter smaller than the head. The part 2 and the tip part 3 are integrally formed.

As shown in FIG. 1, since the distal end portion 3 of the elastic cap has a linear inclination instead of a curved shape, it can be inserted while correcting a slight misalignment that occurs at the time of tapping, and conversely the degree of misalignment. If it is large, it is recognized that fitting is not possible, so there will be no fitting failure such as pushing in forcefully. The inclination of the tip portion 3 referred to here may be 45 degrees or less, but is preferably 10 degrees or more and 40 degrees or less. It is essential to eliminate a step between the tip portion 3 and the cylindrical portion 2 in order to eliminate the clogging of the cap tip portion 3 at the time of stoppering. When the rib 4 is present at the extreme end of the cylindrical portion 2 and contacts the tip portion 3, it is necessary to eliminate the step between the rib 4 and the tip portion 3. The sealing property of the cap is improved by the plurality of convex ribs 4 formed along the outer periphery of the cylindrical portion 2. The shape of the convex rib is not particularly limited. Although any shape can be used as shown in FIGS. 3 and 4, a small rib having a small height is more preferable in terms of sealing property. Further, as shown in FIG. 2, by providing the concave groove portion 5 inside the cylindrical portion 2, the internal pressure applied to the module is absorbed and the cylindrical portion 2 is expanded outward, so that liquid leakage during sterilization is more likely to occur. Can be completely prevented. It is desirable that the volume of the concave groove portion 5 be as large as possible, but it is preferable that the tip portion does not become too thin in order to prevent clogging.

[0006]

[Effect of device]

 The cap of the present invention does not have a collar or the like, but has a good sealing property and can be easily removed, and the work of capping the module body with a machine is easy and reliable. This ease of cap removal work is a great advantage for medical personnel who use a large number of modules.

[Brief description of drawings]

FIG. 1 is a schematic view of an elastic cap of the present invention.

FIG. 2 is a schematic view showing another example of the present invention.

FIG. 3 is an explanatory view of an example of a convex rib.

FIG. 4 is an explanatory view showing another example of the convex rib.

FIG. 5 is a schematic view of a conventional elastic cap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flat head 2 Cylindrical part 3 Tip part 4 Convex rib 5 Concave groove part 6 Tip part 7 Sealing part 8 Large diameter part 9 Collar part

Claims (2)

[Scope of utility model registration request] 1. An elastic cap comprising a flat plate-shaped head 1, a cylindrical portion 2 having a diameter smaller than that of the head, and a tip portion 3 formed integrally with each other. Convex ribs 4 are formed, the tip portion 3 has an inclination of 45 degrees or less, and the diameter is gradually reduced, and there is no step between the tip portion 3 and the cylindrical portion 2. An elastic cap for a hollow fiber membrane module characterized by: 2. The elastic cap for a hollow fiber membrane module according to claim 1, wherein a concave groove portion 5 is provided inside the cylindrical portion 2.