JP2018015040A - Medical cap and manufacturing method thereof - Google Patents

Abstract

[PROBLEMS] To provide a medical device capable of inserting a transfer needle with a smaller force while ensuring high sealing performance, and preventing an elastic stopper from being displaced when the transfer needle is inserted. Provide a cap. A medical cap 1A fixes an elastic plug 40 to an outer frame 10 by being fixed to an elastic plug 40, an outer frame 10, and both the elastic plug 40 and the outer frame 10. And a resin-made fixing portion 50. The elastic plug body 40 has a first main surface 40a, a second main surface 40b, and a peripheral surface 40c, and the outer frame body 10 opposes the top plate portion 21 facing the first main surface 40a and the peripheral surface 40c. And a side wall 22 to be used. An annular protrusion 42 is provided on the second main surface 40b. The fixing portion 50 is provided so as to embed a space between the elastic plug body 40 and the side wall portion 22 and to cover an outer edge portion of the second main surface 40b, and on the second main surface 40b of the fixing portion 50. The inner end portion positioned is positioned outside the innermost portion of the surface of the annular protrusion 42. [Selection] Figure 3

Description

  The present invention relates to a medical cap and a method for manufacturing the same, and more particularly to a medical cap used for a chemical solution container and an infusion container and a method for manufacturing the same.

  In general, the mouth of a medical solution container or infusion container used in the medical field includes an elastic stopper that can be pierced with a transfer needle so that the liquid contained therein can be taken out hygienically. A cap is attached. As a document in which this type of medical cap is disclosed, for example, there is JP 2010-220758 A (Patent Document 1).

  The medical cap disclosed in Patent Document 1 includes a substantially cylindrical elastic plug body, a substantially cylindrical upper frame body that abuts the outer edge of the upper surface of the elastic plug body and surrounds the peripheral surface of the elastic plug body. And a lower frame that is in contact with the outer edge of the lower surface of the elastic plug and is assembled to the upper frame.

  In the medical cap, the lower frame is formed by injection molding using a resin material in a state where the elastic stopper is disposed inside the upper frame, so that the lower frame is elastic with the upper frame. It is manufactured so as to be fixed to both of the stoppers. By comprising in this way, it becomes possible to fix an elastic plug body easily with respect to an upper side frame body and a lower side frame body, and a medical cap can be manufactured cheaply.

  Here, in the medical cap disclosed in Patent Document 1, the elastic stopper is pressed by the lower frame body and is bent upward (that is, the central portion of the elastic stopper is a peripheral edge). In a state of projecting upward from the portion). Such a configuration can be realized by allowing the outer edge portion of the elastic plug body to receive a compressive stress locally from the lower frame body during injection molding of the lower frame body.

  By adopting this configuration, the adhesiveness between the upper frame body and the lower frame body and the elastic plug body will be increased, and it is possible to ensure high sealing performance and at the time of insertion of the transfer needle It is possible to prevent the elastic plug body from being displaced.

JP 2010-220758 A

  However, when the above configuration is adopted, the vicinity of the central portion of the lower surface of the elastic plug body is always compressed, so that when the transfer needle is inserted, this is a great resistance against the insertion of the transfer needle. End up. Therefore, not only does the problem arise that it is necessary to pierce the transfer needle with a greater force, but it may cause coring in some cases.

  Therefore, the present invention has been made in view of the above-mentioned problems, and while the sealing needle can be highly secured, the needle can be inserted with a smaller force, and the needle can be inserted. An object of the present invention is to provide a medical cap capable of preventing the elastic plug body from being displaced and a method for manufacturing the same.

  The medical cap according to the present invention is fixed to the substantially cylindrical elastic plug body, the outer frame body in which the elastic plug body is disposed, and both the elastic plug body and the outer frame body. And a resin fixing part for fixing the elastic plug to the outer frame. The elastic plug body includes a first main surface and a second main surface that are positioned opposite to each other, and a peripheral surface that is connected to both the first main surface and the second main surface, and the outer frame. The body has a top plate portion facing the first main surface and a cylindrical side wall portion facing the peripheral surface. The second main surface is provided with an annular protrusion that protrudes toward the side opposite to the first main surface. The fixing portion is provided so as to embed a space between the elastic plug and the side wall portion and to cover an outer edge portion of the second main surface, and the second main surface of the fixing portion. The inner end located above is located outside the innermost part of the surface of the annular protrusion.

  In the medical cap according to the present invention, the annular protrusion may have a mountain shape in a cross section including the central axis of the elastic plug.

  In the medical cap based on the said invention, it is preferable that the said inner side edge part is located in the vertex vicinity of the said annular protrusion of a mountain shape.

  The manufacturing method of the medical cap based on this invention has the 1st main surface and 2nd main surface which are located relatively, and the surrounding surface connected to both the said 1st main surface and the said 2nd main surface. A step of preparing a substantially cylindrical elastic plug body in which an annular protrusion projecting toward the side opposite to the first main surface side is provided on the second main surface, a top plate portion and a cylindrical shape A step of preparing an outer frame body having a side wall portion, and the elastic plug body is disposed on the outer frame such that the first main surface faces the top plate portion and the peripheral surface faces the side wall portion. The molten first resin material is poured into the space between the elastic plug and the side wall in the step of being arranged inside the body and in the state where the elastic plug is arranged inside the outer frame. And adhering to the outer edge of the second main surface, and then curing the first resin material, By forming the resin fixing portion for fixing to both the Kigai frame, the elastic stopper is provided with a step that is fixed to the outer frame. In the method for manufacturing a medical cap according to the present invention, in the step of fixing the elastic plug body to the outer frame body, the inner end portion of the fixing portion located on the second main surface is the above-mentioned. The fixing portion is formed so as to be positioned outside the innermost portion of the surface of the annular protrusion.

  In the method for producing a medical cap according to the present invention, the step of preparing the outer frame includes a first mold having a first molding surface for molding the outer surface of the outer frame, Using the second mold having a second molding surface for molding the inner surface of the outer frame body including the inner surface of the side wall portion, the molten second resin material is used as the first mold and the first mold. A second mold is poured into the first cavity, and then the second resin material is cured to manufacture the outer frame, and after the outer frame is manufactured, the outer frame is It is preferable to include a step of releasing the outer frame body from only the second mold while maintaining the state held by the first mold. In that case, it is preferable that the step of disposing the elastic plug body inside the outer frame body be performed while the outer frame body is held by the first mold, and in that case The step of fixing the elastic plug body to the outer frame body is a third molding surface for molding the fixing portion while the outer frame body is held by the first mold. The third resin mold is used, and at least a part of the third mold is brought into contact with the second main surface of the portion adjacent to the outer edge portion, whereby the first resin material is removed from the outer frame. It is preferably performed by pouring into a second cavity defined by the body, the elastic plug and the third mold, and then curing the first resin material.

  According to the present invention, the injection needle can be inserted with a smaller force while ensuring high sealing performance, and the elastic stopper is prevented from being displaced when the transfer needle is inserted. It is possible to provide a medical cap that can be manufactured and a method for manufacturing the same.

It is the perspective view which looked at the medical cap in Embodiment 1 of this invention from diagonally upward. It is a top view of the medical cap shown in FIG. It is sectional drawing along the III-III line | wire shown in FIG. It is sectional drawing along the IV-IV line shown in FIG. It is sectional drawing along the VV line shown in FIG. It is the perspective view which looked at the outer frame body shown in FIG. 1 thru | or 5 from diagonally downward. It is the perspective view which looked at the elastic stopper shown in FIG. 1 thru | or 5 from diagonally upward and diagonally downward. FIG. 4 is an enlarged view of regions VIIIA and VIIIB shown in FIG. 3. It is sectional drawing which shows the manufacturing method of the medical cap in Embodiment 1 of this invention. It is sectional drawing which shows the manufacturing method of the medical cap in Embodiment 1 of this invention. It is sectional drawing which shows the manufacturing method of the medical cap in Embodiment 1 of this invention. It is sectional drawing which shows the manufacturing method of the medical cap in Embodiment 1 of this invention. It is sectional drawing which shows the manufacturing method of the medical cap in Embodiment 1 of this invention. It is sectional drawing which shows the manufacturing method of the medical cap in Embodiment 1 of this invention. It is sectional drawing which shows the manufacturing method of the medical cap in Embodiment 1 of this invention. It is a top view of the medical cap in Embodiment 2 of this invention. It is sectional drawing along the XVII-XVII line | wire shown in FIG. It is sectional drawing along the XVIII-XVIII line shown in FIG. It is sectional drawing along the XIX-XIX line | wire shown in FIG. FIG. 20 is a perspective view of the outer frame body shown in FIGS. 16 to 19 as viewed obliquely from below. FIG. 18 is an enlarged view of regions XXIA and XXIB shown in FIG. It is a top view of the medical cap in Embodiment 3 of this invention. It is sectional drawing along the XXIII-XXIII line | wire shown in FIG. It is sectional drawing along the XXIV-XXIV line | wire shown in FIG. FIG. 24 is a cross-sectional view taken along line XXV-XXV shown in FIG. 23. FIG. 26 is a perspective view of the outer frame body shown in FIGS. 22 to 25 as viewed obliquely from below. It is the perspective view which looked at the elastic plug shown in Drawing 22 thru / or Drawing 25 from the slanting upper part and slanting lower part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
FIGS. 1 and 2 are a perspective view and a plan view, respectively, of the medical cap according to the first embodiment of the present invention viewed obliquely from above. 3 and 4 are cross-sectional views taken along lines III-III and IV-IV shown in FIG. 2, respectively, and FIG. 5 is a cross-sectional view taken along line V-V shown in FIG. . 6 is a perspective view of the outer frame body shown in FIGS. 1 to 5 as viewed obliquely from below, and FIGS. 7A and 7B show the elastic plug bodies shown in FIGS. 1 to 5, respectively. It is the perspective view seen from diagonally upward and diagonally downward. 8A and 8B are enlarged views of regions VIIIA and VIIIB shown in FIG. 3, respectively. First, with reference to these FIG. 1 thru | or FIG. 8, 1 A of medical caps in this Embodiment are demonstrated.

  As shown in FIGS. 1 to 5, the medical cap 1 </ b> A includes an outer frame body 10, an elastic plug body 40, and a fixing portion 50. The outer frame body 10 includes a cup-shaped frame portion 20 and a lid portion 30 having a pull-top structure.

  As shown in FIGS. 1 to 6, the outer frame body 10 is made of, for example, a resin member in which the frame portion 20 and the lid portion 30 described above are integrally formed. The frame portion 20 has a substantially annular plate-shaped top plate portion 21 and a substantially cylindrical side wall portion 22 erected from the outer edge of the top plate portion 21, and has an opening at the lower end thereof. ing. The lid portion 30 includes a cover portion 32 that is provided continuously from the inner edge of the substantially annular plate-shaped top plate portion 21, and a pull top 31 that is drawn upward from a predetermined position of the cover portion 32. Yes.

  As a material constituting the outer frame 10, a synthetic resin whose safety is generally established in medical applications can be used. Specifically, thermoplastic resins such as polyethylene, polypropylene, and polyethylene terephthalate, and thermoplastic elastomers such as olefin, styrene, polyurethane, polyester, polyvinyl chloride, and polybutadiene can be used as the synthetic resin. . In particular, it is preferable to use an olefinic thermoplastic elastomer as the synthetic resin. The outer frame 10 can be formed, for example, by injection molding using a mold as will be described later.

  As shown in FIGS. 3 to 5, 7 </ b> A, and 7 </ b> B, the elastic plug 40 has a flat and substantially cylindrical shape, and is disposed inside the outer frame 10. ing. The elastic plug body 40 has a first main surface 40a and a second main surface 40b that are positioned opposite to each other, and a peripheral surface 40c that is connected to both the first main surface 40a and the second main surface 40b. Of these, the first main surface 40a constitutes an upper surface (also referred to as a needle puncture surface), and the second main surface 40b constitutes a lower surface (also referred to as a liquid contact surface).

  As a material constituting the elastic plug 40, rubber or thermoplastic elastomer, which is generally established in medical applications, can be used. Specifically, natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, isoprene-isobutylene rubber, etc. can be used as the rubber, and olefin, styrene, polyurethane, polyester as the thermoplastic elastomer. Thermoplastic elastomers such as those based on polyvinyl chloride, polyvinyl chloride, and polybutadiene can be used. The elastic plug 40 can be formed, for example, by injection molding using a mold.

  As shown in FIGS. 1 to 5, the fixing portion 50 includes a substantially cylindrical tubular portion 51, and a substantially annular plate-like flange portion 52 extending outward from the lower end of the tubular portion 51. have. The fixing portion 50 is for fixing the elastic plug body 40 to the outer frame body 10 by being fixed to both the elastic plug body 40 and the outer frame body 10, and is constituted by a resin member. The fixing portion 50 is provided so that the cylindrical portion 51 is interposed between the outer frame body 10 and the elastic plug body 40 inside the outer frame body 10.

  As a material constituting the fixing portion 50, a synthetic resin whose safety is generally established in medical use can be used. Specifically, the same synthetic resin as that of the outer frame 10 is used. Can do. In particular, it is preferable to use an olefinic thermoplastic elastomer as the synthetic resin. In addition, the fixing | fixed part 50 is formed by injection molding using a metal mold | die so that it may mention later.

  As shown in FIGS. 3 to 5, the first main surface 40 a of the elastic plug body 40 faces the top plate portion 21 of the outer frame body 10, and the peripheral surface 40 c of the elastic plug body 40 is formed of the outer frame body. 10 side wall portions 22 are opposed to each other. On the other hand, the upper end side portion of the cylindrical portion 51 of the fixing portion 50 is located between the peripheral surface 40 c of the elastic plug 40 and the side wall portion 22 of the outer frame body 10, and the cylindrical portion of the fixing portion 50. A portion on the lower end side of 51 is located along the side wall portion 22 of the outer frame body 10. Further, the flange portion 52 of the fixed portion 50 is pulled out to the outside through an opening provided at the lower end of the outer frame body 10.

  The upper end portion of the cylindrical portion 51 of the fixed portion 50 covers the peripheral surface 40c of the elastic plug 40, the outer edge portion of the first main surface 40a, and the outer edge portion of the second main surface 40b. It is fixed to the elastic plug 40. Further, the cylindrical portion 51 of the fixed portion 50 covers the inner side surface of the side wall portion 22 of the outer frame body 10 and is fixed to the outer frame body 10 at the portion. Accordingly, the elastic plug body 40 is held by the fixing portion 50, and the fixing portion 50 that holds the elastic plug body 40 is joined to the outer frame body 10, so that the elastic plug body 40 is interposed via the fixing portion 50. The outer frame body 10 is fixed.

  The medical cap 1A configured as described above is attached to a drug solution container or an infusion container used in the medical field so as to cover their mouths. Then, by pulling up the pull top 31 with a finger or the like, the lid portion 30 including the pull top 31 and the cover portion 32 is detached from the frame portion 20, so that the first main surface 40 a that is the needle puncture surface of the elastic plug 40 is external. Thus, the transfer needle can be inserted into the elastic plug 40.

  Here, in the medical cap 1A according to the present embodiment, the elastic plug body 40 fixed to the outer frame body 10 via the fixing portion 50 is positioned in either the axial direction or the radial direction of the elastic plug body 40. Is held in a state close to no load so as not to be bent or compressed substantially. By comprising in this way, at the time of the puncture of a transfusion needle, the puncture will be possible with a small force, handling will become easy and generation | occurrence | production of a coring will be suppressed.

  Thus, in order to fix the elastic plug body 40 to the outer frame body 10 in a state close to no load, the elastic plug body 40 is substantially elastic during the injection molding for forming the fixing portion 50. It is necessary to prevent the plug 40 from being compressed globally or locally. For this purpose, the elastic stopper 40 is not substantially compressed by the mold when the molten first resin material, which will be described later, which becomes the fixing portion 50 by being cured is injected into the cavity. Although it is necessary to set the injection pressure of the first resin material to a considerably low level, this alone may not be sufficient.

  That is, when the injection pressure is set to be considerably low, the bonding force of the fixing portion 50 to the outer frame body 10 and the elastic plug body 40 may be reduced. From the viewpoint of preventing the reduction of the bonding force. In some cases, it is necessary to secure a larger bonding area between the fixing portion 50 and the elastic plug body 40 and a bonding area between the fixing portion 50 and the outer frame body 10.

  Therefore, in the medical cap 1A in the present embodiment, as described above, the space between the peripheral surface 40c of the elastic plug body 40 and the side wall portion 22 of the outer frame body 10 is embedded by the fixing portion 50. At the same time, the outer edge portion of the first main surface 40a and the outer edge portion of the second main surface 40b of the elastic plug body 40 are each covered with the fixing portion 50, thereby ensuring a large joint area.

  On the other hand, when the mold is merely brought into contact with the elastic plug 40 with a relatively weak force so that the elastic plug 40 is not substantially compressed when the first resin material is injected. In addition, there is a possibility that the first resin material may protrude out of the cavity through the contact portion between the mold and the elastic plug 40, and a device for preventing the first resin material from protruding is necessary. There is a case.

  Further, when the mold is merely brought into contact with the elastic plug 40 with a relatively weak force so that the elastic plug 40 is not substantially compressed during the injection of the first resin material, Positioning of the elastic plug body 40 with respect to the outer frame body 10 does not remain, and the elastic plug body 40 may be displaced due to the injection pressure of the first resin material, and it may be necessary to devise measures to prevent this displacement. is there.

  From the viewpoint of preventing the first resin material from sticking out and preventing the displacement of the elastic plug 40, the medical cap 1A in the present embodiment has the following characteristic configuration.

  As shown in FIGS. 3, 4, 6, and 8 </ b> A, an annular wall that protrudes toward the inside of the outer frame 10 is located at a predetermined position of the top plate portion 21 of the outer frame 10. A portion 21a is provided. More specifically, the annular wall portion 21 a is provided at a position that enters the inside from the outer edge of the top plate portion 21 by a predetermined distance.

  The annular wall portion 21a is a part for damming the melted first resin material during the injection molding of the fixed portion 50, and the tip portion located in the protruding direction of the annular wall portion 21a is the elastic plug body 40. While being in contact with the first main surface 40 a, the inner peripheral surface of the annular wall portion 21 a is in contact with a step surface provided on the first main surface 40 a of the elastic plug 40.

  Thereby, at the time of injection molding of the fixing portion 50, it is possible to prevent the first resin material from protruding outside the cavity in the portion of the elastic plug body 40 on the first main surface 40a side. Therefore, the fixing portion 50 embeds a space located radially outside the annular wall portion 21a and between the elastic plug body 40 and the outer frame body 10, and the needle plug of the elastic plug body 40 is embedded. It can prevent that the 1st main surface 40a which is a surface is covered with the fixing | fixed part 50. FIG.

  As shown in FIG. 3, FIG. 4, FIG. 7B and FIG. 8B, a predetermined position of the second main surface 40b of the elastic plug 40 is directed to the opposite side of the first main surface 40a. A projecting annular projecting portion 42 is provided, and a substantially annular plate-like support portion 51 a projecting toward the inside of the tubular portion 51 is provided at a predetermined position of the tubular portion 51 of the fixed portion 50. Yes. More specifically, the annular protrusion 42 is provided on the second main surface 40b at a position entering the inside from the peripheral surface 40c of the elastic plug 40 by a predetermined distance, and the support portion 51a is provided on the elastic plug 40. It is provided so as to cover the outer edge of second main surface 40b.

  The annular protrusion 42 is a mold (a third mold described later in the present embodiment) that is disposed so as to abut on the second main surface 40b of the elastic plug 40 during the injection molding of the fixing portion 50. 300 (refer to FIG. 13 to FIG. 15 corresponds to this) is a part mainly provided for damming the melted first resin material. More specifically, the annular protrusion 42 is provided such that a tip portion positioned in the protruding direction of the annular protrusion 42 abuts on the mold when the fixing portion 50 is injection molded.

  Thereby, at the time of injection molding of the fixing portion 50, it is possible to prevent the first resin material from protruding to the outside of the cavity at the portion on the second main surface 40b side of the elastic plug body 40. Therefore, the support portion 51 a of the fixing portion 50 is formed at a position radially outside of the annular protrusion 42, and the second main surface 40 b that is the liquid contact surface of the elastic plug 40 is fixed to the fixing portion 50. It is possible to prevent the cover from being covered.

  Here, in the present embodiment, the annular protrusion 42 has a mountain shape in a cross section including the central axis of the elastic plug body 40, and the second of the elastic plug body 40 in the fixing portion 50. The inner end portion of the support portion 51a, which is a portion located on the main surface 40b, is located in the vicinity of the apex of the mountain-shaped annular protrusion 42, but the inner end portion of the support portion 51a is an annular protrusion. It suffices if it is disposed outside the inner end of the portion 42 (that is, in the region indicated by the arrow A in FIG. 8B), and further disposed outside the annular protrusion 42. May be.

  By configuring in this way, compared to the case where the annular protrusion 42 is not provided, a cavity that is a space filled with the first resin material at the time of injection molding (in this embodiment, a second cavity C2 described later) A long distance on the second main surface 40b of the elastic plug 40 can be secured between the inner end of the elastic plug 40 (see FIG. 14) and the portion where the needle plug of the elastic plug 40 is scheduled. Thus, the first resin material can be effectively prevented from sticking out to the portion where the needle stick is scheduled.

  That is, the annular protrusion 42 not only exhibits a function of blocking the molten first resin material by cooperating with the above-described mold, but also in the event that the first resin material protrudes from the cavity. This also has a function for preventing the needle from reaching the part where the needle stick is scheduled.

  As shown in FIGS. 3, 4, and 7 (B), a gentle slope is formed at a position inside the second main surface 40 b of the elastic plug body 40 from the position where the annular protrusion 42 is provided. The substantially conical recessed part 41 which has is provided. The concave portion 41 is for reducing the resistance when the transfer needle is inserted by reducing the thickness of the central portion of the elastic plug body 40, and at the time of injection molding of the fixing portion 50. In order to prevent an unnecessary compressive force from acting on the elastic plug body 40 by the mold, the inner end portion of the cavity and the portion where the needle insertion of the elastic plug body 40 is planned are described. It is also for securing a longer distance on the second main surface 40b of the elastic plug 40 between the two.

  As shown in FIGS. 2 to 6, the inner side surface of the side wall portion 22 of the outer frame body 10 extends along the axial direction of the outer frame body 10 (that is, the axial direction of the substantially cylindrical side wall portion 22). A plurality of ridge portions 22a are provided. The plurality of ridge portions 22a are evenly arranged along the circumferential direction of the side wall portion 22 so as to be positioned in parallel with each other. In the present embodiment, a plurality of protrusions 22a are provided at intervals of 90 ° with a distance from each other. In addition, in FIG. 2, the inner surface of the side wall part 22 in which the said some protrusion part 22a was provided is shown with the broken line.

  The plurality of protrusions 22a constitute a protrusion that contacts the peripheral surface 40c of the elastic plug 40, and the elastic plug 40 is fixed to the outer frame 10 during the injection molding of the fixed portion 50. It functions as a positioning part for positioning. More specifically, each of the plurality of protrusions 22a has a distal end surface located in the protruding direction in contact with the peripheral surface 40c of the elastic plug body 40, whereby the central axis of the elastic plug body 40 and the outer frame The center axis of the body 10 is configured to match.

  Thus, by providing the plurality of protrusions 22a on the inner side surface of the side wall portion 22 of the outer frame body 10, the peripheral surface 40c of the elastic plug body 40 and the inner side surface of the side wall portion 22 of the outer frame body 10 are provided. Of the substantially cylindrical space between them, the space excluding the portion where the plurality of ridge portions 22a are located is embedded by the tubular portion 51 of the fixing portion 50 described above. As a result, the bonding area between the outer frame body 10 and the fixing portion 50 also increases, and in this respect as well, the bonding force of the fixing portion 50 to the outer frame body 10 can be improved.

  In addition, the some protrusion part 22a does not necessarily need to be provided uniformly along the circumferential direction of the side wall part 22, and it is good also as providing this unevenly. Further, the number of the plurality of protrusions 22a is not limited to four, and may be any number as long as it is two or more. Furthermore, it is not always necessary to configure the protrusions contacting the peripheral surface 40c of the elastic plug 40 with the plurality of protrusions 22a as described above, and for example, the protrusions are formed with a plurality of spot-like protrusions. Alternatively, this may be configured by a plurality of protrusions intermittently provided in the circumferential direction of the side wall 22, or a single spiral provided on the inner surface of the side wall 22. You may comprise this by the one or several protrusion part.

  Further, as shown in FIGS. 4 and 6, a protruding holding portion 22 a 1 is provided at a predetermined position on the distal end surface located in the protruding direction of each of the plurality of protrusions 22 a. The holding portion 22a1 is a portion for holding the elastic plug body 40 by contacting the outer edge portion of the second main surface 40b of the elastic plug body 40. The holding function is mainly injection molding of the fixing portion 50. Demonstrated in time.

  That is, when the above-described holding portion 22a1 is not provided, the elastic plug body 40 is provided with a plurality of protrusions provided on the side wall portion 22 of the outer frame body 10 before the fixing portion 50 is formed. However, when the holding portion 22a1 is provided, the elastic plug body 40 can be easily positioned in the axial direction with respect to the outer frame body 10 and can be prevented from falling off. It becomes possible. Note that the holding portion 22a1 is not necessarily an essential configuration, and may be provided as necessary.

  As described above, in the medical cap 1 </ b> A according to the present embodiment, the annular protrusion 42 is provided on the second main surface 40 b of the elastic plug body 40, and the second main surface of the fixing portion 50. The inner end portion located on 40 b is configured to be located outside the innermost portion of the surface of the annular protrusion 42, whereby the first resin material for forming the fixing portion 50 is formed. During the injection molding, the first resin material is prevented from protruding.

  In the medical cap 1A according to the present embodiment, a plurality of protrusions 22a that contact the peripheral surface 40c of the elastic plug 40 are provided on the inner surface of the side wall 22 of the outer frame 10, and the elastic plug Of the space between the body 40 and the side wall portion 22, the space excluding the portion where the plurality of protrusions 22 a are located is configured to be embedded by the fixing portion 50. At the time of injection molding of the first resin material for forming, the displacement of the elastic plug body 40 is prevented from occurring.

  Therefore, by adopting the above configuration, the elastic plug body 40 can be fixed to the outer frame body 10 in a state close to no load as described above. Therefore, when the transfer needle is inserted, the insertion can be performed with a smaller force, and not only the handling becomes easy, but also the occurrence of coring can be suppressed.

  Furthermore, by adopting the above configuration, the space between the peripheral surface 40c of the elastic plug body 40 and the side wall portion 22 of the outer frame body 10 is embedded by the fixing portion 50, so that high sealing performance is ensured. This makes it possible to increase the joining force. Therefore, it is possible to prevent the elastic stopper 40 from being displaced when the transfer needle is inserted.

  Therefore, by using the medical cap 1A in the present embodiment, the transfusion needle can be inserted with a smaller force while ensuring high sealing performance, and the elastic cap is inserted when the transfusion needle is inserted. The medical cap can prevent the body 40 from being displaced.

  In addition, it is not necessary to employ | adopt simultaneously the structure for preventing the protrusion of the 1st resin material mentioned above, and the structure for preventing the position shift of the elastic plug body 40 at the time of injection molding of the fixing | fixed part 50 at the same time. Even when only one of these is adopted, the transfusion needle can be inserted with a smaller force while ensuring high sealing performance, and an elastic stopper is used when inserting the transfusion needle. It can be set as the medical cap which can prevent that 40 is displaced.

  9 to 15 are cross-sectional views for explaining the method for manufacturing the medical cap in the present embodiment described above. Next, with reference to these FIG. 9 thru | or FIG. 15, the manufacturing method of 1 A of medical caps in this Embodiment is demonstrated concretely. The manufacturing method of the medical cap shown in the present embodiment uses so-called two-color molding. However, it is not always necessary to use two-color molding, and at least the fixing portion 50 is formed by injection molding. That's fine.

  As shown in FIG. 9, first, a second mold 200 having a predetermined shape is disposed so as to face the first mold 100 having a predetermined shape, and the second mold 200 is moved along the direction of the arrow shown in the drawing. It is moved toward one mold 100. Here, the first mold 100 has a first molding surface 101 for molding the outer surface of the outer frame body 10, and the second mold 200 is the side wall portion 22 of the outer frame body 10 described above. It has the 2nd shaping | molding surface 201 for shape | molding the inner surface containing an inner surface.

  As shown in FIG. 10, by fitting the second mold 200 to the first mold 100, a first cavity C <b> 1 is formed between the first mold 100 and the second mold 200. Will be. The first cavity C1 corresponds to the shape of the outer frame body 10, and is defined by the first molding surface 101 and the second molding surface 201 described above.

  Next, as shown in FIG. 11, the melted second resin material that becomes the outer frame body 10 is poured into the first cavity C1 through a gate (not shown), and the second resin material is cured, The outer frame body 10 is formed. In that case, the frame part 20 and the cover part 30 which were mentioned above are provided integrally, and the outer frame body 10 is formed as a single member. At that time, a plurality of protrusions 22a each having a holding portion 22a1 are formed on the inner surface of the side wall portion 22 of the outer frame body 10.

  Next, as shown in FIG. 12, the second mold 200 is moved away from the first mold 100 along the direction of the arrow shown in the figure, whereby the outer frame 10 is moved to the second mold 200. It is released from. At that time, by preventing the outer frame body 10 from being released from the first mold 100, the outer frame body 10 is maintained in a state of being held by the first mold 100.

  Next, as shown in FIG. 13, the elastic plug body 40 is disposed inside the outer frame body 10 held by the first mold 100.

  Here, the elastic plug body 40 is disposed so that the peripheral surface 40 c thereof abuts on the front end portions of the plurality of protrusions 22 a provided on the side wall portion 22 of the outer frame body 10. Thereby, the central axis of the elastic plug body 40 and the central axis of the outer frame body 10 are matched, and the elastic plug body 40 is positioned in a direction orthogonal to the axial direction of the elastic plug body 40.

  The elastic plug body 40 is disposed such that the first main surface 40a abuts on the tip of the annular wall portion 21a provided on the top plate portion 21 of the outer frame body 10, and the second main surface thereof. It arrange | positions so that the outer edge part of 40b may be hold | maintained by the holding | maintenance part 22a1 provided in the some protrusion part 22a of the outer frame 10. As shown in FIG. As a result, the elastic plug body 40 is positioned in the axial direction.

  Next, as shown in FIG. 13, a third mold 300 having a predetermined shape is disposed so as to face the first mold 100 holding the outer frame body 10 in which the elastic plug body 40 is disposed. The third mold 300 is moved toward the first mold 100 along the arrow direction shown inside. Here, the 3rd metal mold | die 300 has the 3rd molding surface 301 for forming the fixing | fixed part 50, and the support part 51a of the fixing | fixed part 50 mentioned above in the predetermined position of the said 3rd molding surface 301 is. Is provided with a stepped portion 302 for molding.

  As shown in FIG. 14, when the third mold 300 is fitted to the first mold 100 holding the outer frame body 10 in which the elastic plug body 40 is arranged, the outer frame body 10 and the elastic plug body are fitted. A second cavity C <b> 2 is formed between the body 40, the first mold 100, and the third mold 300. The second cavity C2 corresponds to the shape of the fixed portion 50, and is mainly defined by the outer frame body 10, the elastic plug body 40, and the third molding surface 301 described above.

  Next, as shown in FIG. 15, the molten first resin material to be the fixing portion 50 is poured into the second cavity C <b> 2 through a gate (not shown), and the first resin material is cured to fix the first resin material. Part 50 is formed. As a result, the elastic plug body 40 disposed inside the outer frame body 10 is fixed to the outer frame body 10 via the fixing portion 50.

  In that case, the 1st resin material which flowed into the part prescribed | regulated by the top-plate part 21 of the outer frame 10 and the 1st main surface 40a of the elastic plug body 40 among 2nd cavities C2 is the top-plate part 21. It will be dammed up by the annular wall part 21a provided in this, and the elastic stopper body 40 of the part contact | abutted to this. As a result, the fixing portion 50 embeds a space located radially outside the annular wall portion 21 a and between the elastic plug body 40 and the outer frame body 10. The first main surface 40a, which is a surface, is not covered by the fixing portion 50 (see FIG. 8A and the like).

  At that time, the first resin material that has flowed into the portion of the second cavity C2 that is defined by the step 302 provided on the third molding surface 301 and the elastic plug 40 is the elastic plug 40. It will be dammed up by the annular protrusion 42 provided on the second main surface 40b and the third mold 300 in contact with the annular protrusion 42. Accordingly, the inner end portion of the fixing portion 50 (that is, the tip portion of the support portion 51a) located on the second main surface 40b of the elastic plug body 40 is located outside the innermost portion of the annular protrusion 42. Therefore, the second main surface 40b that is the liquid contact surface of the elastic plug 40 is not covered by the fixing portion 50 (see FIG. 8B, etc.).

  Furthermore, in that case, a plurality of protrusions 22a provided in the side wall portion 22 of the outer frame body 10 in the space between the elastic plug body 40 and the outer frame body 10 in the second cavity C2 are positioned. The space excluding the portion to be filled is filled with the first resin material, and the fixing portion 50 is formed in the space (see FIGS. 3 and 5).

  Next, the first mold 100 and the third mold 300 are released from the medical cap 1A in which the elastic plug body 40 is fixed to the outer frame body 10 through the fixing portion 50. Cap 1A is removed. Thus, the manufacture of the medical cap 1A is completed.

  By manufacturing a medical cap using such a manufacturing method, the transfer needle can be inserted with a smaller force while ensuring high sealing performance, and the transfer needle is elastic when inserted. It becomes possible to easily manufacture the medical cap 1A that can prevent the plug body 40 from being displaced.

(Embodiment 2)
FIG. 16 is a plan view of a medical cap according to Embodiment 2 of the present invention. 17 and 18 are cross-sectional views taken along lines XVII-XVII and XVIII-XVIII shown in FIG. 16, respectively, and FIG. 19 is a cross-sectional view taken along lines XIX-XIX shown in FIG. . 20 is a perspective view of the outer frame body shown in FIGS. 16 to 19 as viewed obliquely from below. FIGS. 21 (A) and 21 (B) are enlarged views of regions XXIA and XXIB shown in FIG. 17, respectively. FIG. Hereinafter, with reference to these FIG. 16 thru | or FIG. 21, the medical cap 1B in this Embodiment is demonstrated.

  As shown in FIGS. 16 to 19, the medical cap 1 </ b> B in the present embodiment has a flat and substantially cylindrical shape when compared with the medical cap 1 </ b> A in the first embodiment described above. The diameter of 40 is somewhat reduced, and accordingly, the protruding heights of the plurality of protrusions 22a provided on the inner surface of the side wall portion 22 of the outer frame body 10 are configured to be increased accordingly. The configuration is mainly different in that the top plate portion 21 of the outer frame body 10 is provided with an annular protrusion 21b instead of the annular wall portion 21a described above.

  Specifically, as shown in FIGS. 16 to 20, a plurality of protrusions 22 a extending along the axial direction of the outer frame 10 are provided on the inner surface of the side wall 22 of the outer frame 10. In the present embodiment, a plurality of protrusions 22a are provided at intervals of 90 ° at intervals of 90 °. In addition, in FIG. 16, the inner surface of the side wall part 22 in which the said some protrusion part 22a was provided is shown with the broken line.

  Here, as shown in FIG. 18 and FIG. 19, the plurality of protrusions 22 a are arranged such that the distal end surfaces located in the protruding directions are the peripheral surfaces of the elastic plug body 40 as in the case of the first embodiment described above. 40c, so that the central axis of the elastic plug body 40 and the central axis of the outer frame body 10 coincide with each other. Therefore, as shown in FIGS. 17 and 19, a plurality of protrusions 22 a in a substantially cylindrical space between the peripheral surface 40 c of the elastic plug 40 and the inner surface of the side wall 22 of the outer frame 10. The space excluding the portion where the is located is buried by the cylindrical portion 51 of the fixed portion 50.

  As shown in FIGS. 17, 18, 20, and 21 (A), an annular protrusion that protrudes toward the inside of the outer frame body 10 at a predetermined position of the top plate portion 21 of the outer frame body 10. 21b is provided. More specifically, the annular protrusion 21b is provided at a position that enters inside a predetermined distance from the outer edge of the top plate portion 21, and is different from the above-described annular wall portion 21a (see FIG. 8A, etc.) The tip portion is formed of a protrusion having a smaller outer shape having a sharp triangular shape in a sectional view.

  The top plate portion 21 in the vicinity of the portion where the annular protrusion 21 b is provided is in close contact with the outer edge portion of the first main surface 40 a of the elastic plug body 40, whereby the annular protrusion 21 b bites into the elastic plug body 40. . The annular protrusion 21b is a part for damming the melted first resin material when the fixing portion 50 is injection molded.

  Thereby, at the time of injection molding of the fixing portion 50, it is possible to prevent the first resin material from protruding outside the cavity in the portion of the elastic plug body 40 on the first main surface 40a side. Therefore, the fixing portion 50 embeds a space located between the peripheral surface 40c of the elastic plug body 40 and the outer frame body 10, and the first main surface 40a that is the needle puncture surface of the elastic plug body 40 is It can be prevented from being covered with the fixing portion 50.

  On the other hand, as shown in FIGS. 17, 18, and 21 (B), an annular protrusion that protrudes toward the opposite side of the first main surface 40 a at a predetermined position of the second main surface 40 b of the elastic plug 40. A portion 42 is provided, and a substantially annular plate-like support portion 51 a that protrudes toward the inside of the tubular portion 51 is provided at a predetermined position of the tubular portion 51 of the fixed portion 50. The configurations of the annular protrusion 42 and the support 51a are the same as those in the first embodiment described above.

  Thus, as in the case of the first embodiment described above, at the time of injection molding of the fixing portion 50, the first resin material bites out of the cavity at the portion on the second main surface 40b side of the elastic plug 40. It can be prevented from taking out. Therefore, the support portion 51 a of the fixing portion 50 is formed at a position radially outside of the annular protrusion 42, and the second main surface 40 b that is the liquid contact surface of the elastic plug 40 is fixed to the fixing portion 50. It is possible to prevent the cover from being covered.

  Even in such a configuration, the elastic plug body 40 can be fixed to the outer frame body 10 in a state close to no load, as in the case of the first embodiment described above. Therefore, by adopting this configuration, the transfer needle can be inserted with a smaller force while ensuring high sealing performance, and the elastic stopper 40 is displaced when the transfer needle is inserted. It can be set as the medical cap which can prevent that.

  Although the description of the medical cap 1B in the present embodiment is omitted here, the medical cap 1B can be manufactured by a manufacturing method according to the manufacturing method of the medical cap 1A described in the first embodiment. .

(Embodiment 3)
FIG. 22 is a plan view of a medical cap according to Embodiment 3 of the present invention. 23 and 24 are cross-sectional views taken along lines XXIII-XXIII and XXIV-XXIV shown in FIG. 22, respectively, and FIG. 25 is a cross-sectional view taken along lines XXV-XXV shown in FIG. . 26 is a perspective view of the outer frame body shown in FIGS. 22 to 25 as viewed obliquely from below, and FIGS. 27A and 27B show the elastic plug bodies shown in FIGS. 22 to 25, respectively. It is the perspective view seen from diagonally upward and diagonally downward. Hereinafter, with reference to these FIG. 22 thru | or FIG. 27, the medical cap 1C in this Embodiment is demonstrated.

  As shown in FIGS. 22 to 27, the medical cap 1C in the present embodiment has a plurality of protrusions on the side wall portion 22 of the outer frame 10 when compared with the medical cap 1A in the first embodiment described above. The configuration is mainly different in that the strip portion 22a is not provided and a plurality of convex portions 43 are provided on the peripheral surface 40c of the elastic plug 40 instead.

  Specifically, as shown in FIGS. 22 to 25, 27 (A), and 27 (B), the peripheral surface 40 c of the elastic plug 40 has a plurality of protrusions protruding outward from the peripheral surface 40 c. The convex portions 43 are provided, and in the present embodiment, a plurality of convex portions 43 are provided at intervals of 90 ° with respect to each other. In addition, in FIG. 22, the surrounding surface 40c of the elastic stopper 40 in which the said some convex part 43 was provided is shown with the broken line.

  On the other hand, as shown in FIGS. 23 to 26, the inner side surface of the side wall portion 22 of the outer frame body 10 is not provided with the plurality of protrusions 22a (see FIG. 6 and the like) described above. Is generally composed of a circumferential surface.

  The plurality of convex portions 43 described above constitute a protruding portion that comes into contact with the inner side surface of the side wall portion 22 of the outer frame body 10. It functions as a positioning portion for positioning with respect to the surface. More specifically, each of the plurality of convex portions 43 has a tip surface positioned in the protruding direction in contact with the inner surface of the side wall portion 22, whereby the central axis of the elastic plug body 40 and the outer frame body 10 are It is comprised so that a central axis may correspond.

  Thus, by providing the plurality of convex portions 43 on the peripheral surface 40 c of the elastic plug body 40, a substantially cylindrical shape between the peripheral surface 40 c of the elastic plug body 40 and the inner surface of the side wall portion 22 of the outer frame body 10. The space excluding the portion where the plurality of convex portions 43 are located is embedded in the cylindrical portion 51 of the fixed portion 50. As a result, the joint area between the outer frame body 10 and the fixing portion 50 also increases.

  In addition, the some convex part 43 does not necessarily need to be provided uniformly along the circumferential direction of the peripheral surface 40c of the elastic plug body 40, and it is good also as providing this unevenly. Further, the number of the plurality of convex portions 43 is not limited to four, and may be any number as long as it is two or more. Furthermore, it is not always necessary to configure the protrusions contacting the inner surface of the side wall portion 22 of the outer frame body 10 with the plurality of protrusions 43 as described above, for example, with a plurality of spot-like protrusions. It may be configured, or may be configured by a plurality of protrusions intermittently provided in the circumferential direction of the elastic plug body 40, or spirally formed on the peripheral surface 40 c of the elastic plug body 40. You may comprise this with the provided single or several protrusion part.

  As shown in FIGS. 23 and 24, an annular wall portion 21 a having an annular shape protruding toward the inside of the outer frame body 10 is provided at a predetermined position of the top plate portion 21 of the outer frame body 10. The configuration of the annular wall portion 21a is the same as that in the first embodiment described above.

  As a result, as in the case of the first embodiment described above, the first resin material bites out of the cavity in the portion of the elastic plug 40 on the first main surface 40a side during the injection molding of the fixing portion 50. It can be prevented from taking out. Therefore, the fixing portion 50 embeds a space located radially outside the annular wall portion 21a and between the elastic plug body 40 and the outer frame body 10, and the needle plug of the elastic plug body 40 is embedded. It can prevent that the 1st main surface 40a which is a surface is covered with the fixing | fixed part 50. FIG.

  On the other hand, as shown in FIGS. 23 and 24, an annular protrusion 42 is provided at a predetermined position of the second main surface 40b of the elastic plug 40 so as to protrude toward the side opposite to the first main surface 40a. In addition, a substantially annular plate-like support portion 51 a that protrudes toward the inside of the cylindrical portion 51 is provided at a predetermined position of the cylindrical portion 51 of the fixed portion 50. The configurations of the annular protrusion 42 and the support 51a are the same as those in the first embodiment described above.

  Thus, as in the case of the first embodiment described above, at the time of injection molding of the fixing portion 50, the first resin material bites out of the cavity at the portion on the second main surface 40b side of the elastic plug 40. It can be prevented from taking out. Therefore, the support portion 51 a of the fixing portion 50 is formed at a position radially outside of the annular protrusion 42, and the second main surface 40 b that is the liquid contact surface of the elastic plug 40 is fixed to the fixing portion 50. It is possible to prevent the cover from being covered.

  Even in such a configuration, the elastic plug body 40 can be fixed to the outer frame body 10 in a state close to no load, as in the case of the first embodiment described above. Therefore, by adopting this configuration, the transfer needle can be inserted with a smaller force while ensuring high sealing performance, and the elastic stopper 40 is displaced when the transfer needle is inserted. It can be set as the medical cap which can prevent that.

  The medical cap 1C in the present embodiment is not described here, but can be manufactured by a manufacturing method according to the manufacturing method of the medical cap 1A described in the first embodiment. .

  In Embodiments 1 to 3 of the present invention described above, the case where a medical cap is manufactured by two-color molding has been described as an example. However, as described above, this is manufactured without using two-color molding. Of course it is also possible. For example, injection molding of the outer frame body and the fixed portion may be performed using separate molds without using the common first mold.

  The characteristic configurations disclosed in the first to third embodiments of the present invention described above can naturally be combined with each other without departing from the spirit of the present invention.

  Thus, the above-described embodiment disclosed herein is illustrative in all respects and is not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1A to 1C Medical cap, 10 outer frame, 20 frame portion, 21 top plate portion, 21a annular wall portion, 21b annular projection, 22 side wall portion, 22a ridge portion, 22a1 holding portion, 30 lid portion, 31 pull top, 32 cover portion, 40 elastic plug body, 40a first main surface, 40b second main surface, 40c peripheral surface, 41 concave portion, 42 annular projection, 43 convex portion, 50 fixing portion, 51 cylindrical portion, 51a support portion, 52 collar part, 100 first mold, 101 first molding surface, 200 second mold, 201 second molding surface, 300 third mold, 301 third molding surface, 302 stepped part, C1 first cavity, C2 Second cavity.

Claims (5)

A substantially cylindrical elastic plug;
An outer frame body in which the elastic plug body is disposed;
A resin-made fixing portion that fixes the elastic plug to the outer frame by being fixed to both the elastic plug and the outer frame;
The elastic plug body has a first main surface and a second main surface that are positioned opposite to each other, and a peripheral surface that is connected to both the first main surface and the second main surface,
The outer frame body has a top plate portion facing the first main surface, and a cylindrical side wall portion facing the peripheral surface,
The second main surface is provided with an annular protrusion that protrudes toward the side opposite to the first main surface side,
The fixing portion is provided so as to embed a space between the elastic plug and the side wall portion and to cover an outer edge portion of the second main surface,
The medical cap in which the inner side edge part located on the said 2nd main surface of the said fixing | fixed part is located outside the innermost part of the surface of the said cyclic | annular protrusion.   The medical cap according to claim 1, wherein the annular protrusion has a mountain shape in a cross section including a central axis of the elastic plug.   The medical cap according to claim 2, wherein the inner end portion is located in the vicinity of the apex of the annular protrusion having a mountain shape. A first main surface and a second main surface located opposite to each other; and a peripheral surface connected to both the first main surface and the second main surface; and on the opposite side to the first main surface side. A step of preparing a substantially cylindrical elastic plug body in which an annular protrusion projecting toward the second main surface is provided;
A step of preparing an outer frame body having a top plate portion and a cylindrical side wall portion;
The elastic plug body is disposed inside the outer frame body such that the first main surface faces the top plate portion and the peripheral surface faces the side wall portion;
In a state in which the elastic plug body is disposed inside the outer frame body, the molten first resin material is poured into the space between the elastic plug body and the side wall portion and on the outer edge portion of the second main surface. Then, the elastic plug is attached to the outer frame by forming a resin-made fixing portion that is fixed to both the elastic plug and the outer frame by curing the first resin material. A process to be fixed,
In the step of fixing the elastic plug body to the outer frame body, the inner end portion of the fixing portion located on the second main surface is located outside the innermost portion of the surface of the annular protrusion. The manufacturing method of the medical cap in which the said fixing | fixed part is formed so that it may become. The step of preparing the outer frame includes molding a first mold having a first molding surface for molding an outer surface of the outer frame and an inner surface of the outer frame including an inner surface of the side wall portion. And using a second mold having a second molding surface to pour the molten second resin material into the first cavity defined by the first mold and the second mold, The step of manufacturing the outer frame body by curing the second resin material, and after the manufacturing of the outer frame body, while maintaining the state where the outer frame body is held by the first mold, Releasing the outer frame from only the second mold,
The step of arranging the elastic plug body inside the outer frame body is performed while the outer frame body is held by the first mold,
The step of fixing the elastic plug body to the outer frame body includes a third molding surface for molding the fixing portion while the outer frame body is held by the first mold. Using the three molds, by bringing at least a part of the third mold into contact with the second main surface of the portion adjacent to the outer edge, the first resin material and the outer frame body The method for producing a medical cap according to claim 4, wherein the medical cap is produced by pouring into a second cavity defined by an elastic plug and the third mold and then curing the first resin material.

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