JP6438825B2 - Method for producing stopper for infusion container and stopper for infusion container - Google Patents

Description

  The present invention relates to a method for producing a stopper for an infusion container that is used by being attached to the mouth of the infusion container, and a stopper for an infusion container.

  An elastic stopper made of a thermoplastic elastomer that allows the insertion of a puncture needle and a thermoplastic that holds the elastic stopper in close contact with each other as a stopper that is attached to the mouth of a back-type or bottle-type infusion container. The one provided with an outer frame made of synthetic resin is known (see, for example, Patent Documents 1 to 4 below).

  For the production of the plug, a two-color molding method or an insert molding method is used. In the case of the two-color molding method, an elastic plug is prepared using a male mold (core) and a female mold (cavity), and the male mold with the elastic plug remaining and a female mold (cavity) are used to remove the elastic plug. A frame is prepared, and the plug whose outer frame is in close contact with the elastic plug is taken out. On the other hand, in the case of the insert molding method, an elastic plug is prepared and taken out using a male mold (core) and a female mold (cavity), and a male mold in which an elastic plug is inserted (male used for manufacturing an elastic plug). An outer frame is produced using another male mold (core) having the same shape as the mold and another female mold (cavity), and the plug with the outer frame in close contact with the elastic plug is taken out.

  By the way, the thermoplastic elastomer which is the material of the elastic plug is produced by using the two-color molding method or the insert molding method for the reason that its adhesiveness is higher than that of the thermoplastic synthetic resin. In addition, the elastic plug may be left in the female mold (cavity) when the mold is opened in the elastic plug manufacturing process. Since this phenomenon adversely affects the production efficiency when the plug body is manufactured using a two-color molding method or an insert molding method, a device that can be reduced by a minimum change in the shape of the molded product is desired.

JP 2012-239529 A JP2013-013585A JP 2014-018240 A JP 2014-027980 A

  An object of the present invention is for an infusion container that can reduce the occurrence of a phenomenon in which an elastic plug is left behind in a female mold (cavity) even when a thermoplastic elastomer is used as a material of the elastic plug. An object of the present invention is to provide a method of manufacturing a plug and a plug for an infusion container.

  In order to solve the above-mentioned problems, the present invention (a method for producing a stopper for an infusion container) includes an elastic stopper made of a thermoplastic elastomer that can be inserted through a puncture needle, and a heat that holds the elastic stopper in close contact. A method for manufacturing a stopper for an infusion container comprising an outer frame made of a plastic synthetic resin, comprising: a male mold having an engagement portion for forming an engaged portion on the elastic plug; and the male mold The method includes the step of producing an elastic plug having the engaged portion by using a female mold that defines a molding space for the elastic plug therebetween.

  In addition to the above, the present invention (method for producing a stopper for an infusion container) is characterized in that the engaged portion of the elastic plug is provided on the outer peripheral surface and / or the bottom surface of the elastic plug. And

  Furthermore, the present invention (manufacturing method of an infusion container stopper) is characterized in that, in addition to the above, the engaged portion of the elastic stopper is constituted by at least one recess and / or protrusion. Features.

  Furthermore, the present invention (manufacturing method of a stopper for an infusion container) is characterized in that, in addition to the above, at least a part of the engaged portion of the elastic plug is opened at the bottom surface of the elastic plug. To do.

  Further, according to the present invention (a method for producing a stopper for an infusion container), in addition to the above, the elastic stopper making step is a step when the stopper for an infusion container is manufactured by a two-color molding method. Its features.

  Furthermore, the present invention (method for producing a plug for an infusion container) is characterized in that the elastic plug production step is a step when the plug for an infusion container is produced by an insert molding method.

  On the other hand, the present invention (infusion container stopper) includes an elastic stopper made of a thermoplastic elastomer that allows a puncture needle to be inserted, and an outer frame made of a thermoplastic synthetic resin that holds the elastic stopper in a tightly-contacted state. The elastic stopper has an engaged portion on the outer peripheral surface and / or the bottom surface of the elastic stopper.

  Moreover, the present invention (infusion container stopper) is characterized in that, in addition to the above, the engaged portion of the elastic stopper is constituted by at least one concave portion and / or convex portion.

  Furthermore, the present invention (infusion container stopper) is characterized in that, in addition to the above, at least a part of the engaged portion of the elastic stopper is opened at the bottom surface of the elastic stopper.

  According to the present invention, even when a thermoplastic elastomer is used as the material of the elastic plug, the infusion container can reduce the phenomenon that the elastic plug is left behind in the female mold (cavity) when the mold is opened in the elastic plug manufacturing process. A manufacturing method of a stopper and a stopper for an infusion container can be provided.

FIG. 1 is a plan view of a plug body (first embodiment) to which the present invention is applied. 2 is a cross-sectional view taken along line S1-S1 of FIG. FIG. 3 is a side view of the elastic stopper shown in FIGS. 1 and 2. FIG. 4 is a cross-sectional view showing a state where the stopper shown in FIGS. 1 and 2 is attached to the mouth of the infusion container. 5 (A) to 5 (C) are diagrams for explaining a method of manufacturing the plug body shown in FIGS. 1 and 2. FIG. 6 is a plan view of a plug body (second embodiment) to which the present invention is applied. FIG. 7 is a sectional view taken along line S2-S2 of FIG. FIG. 8 is a side view of the elastic stopper shown in FIGS. 6 and 7. FIG. 9 is a cross-sectional view showing a state where the stopper shown in FIGS. 6 and 7 is attached to the mouth of the infusion container. 10 (A) to 10 (C) are diagrams for explaining a method of manufacturing the plug shown in FIGS. 6 and 7. FIG. 11 is a plan view of a plug body (third embodiment) to which the present invention is applied. 12 is a cross-sectional view taken along line S3-S3 of FIG. FIG. 13 is a side view of the elastic stopper shown in FIGS. 11 and 12. FIG. 14 is a cross-sectional view showing a state in which the stopper shown in FIGS. 11 and 12 is attached to the mouth of the infusion container. 15 (A) to 15 (C) are diagrams for explaining a method of manufacturing the plug body shown in FIGS. 11 and 12. FIG. 16 is a plan view of a plug body (fourth embodiment) to which the present invention is applied. 17 is a cross-sectional view taken along line S4-S4 of FIG. FIG. 18 is a side view of the elastic plug shown in FIGS. 16 and 17. FIG. 19 is a cross-sectional view showing a state where the stopper shown in FIGS. 16 and 17 is attached to the mouth of the infusion container. 20 (A) to 20 (C) are diagrams for explaining a method of manufacturing the plug shown in FIGS. 16 and 17.

<< First Embodiment >>
First, the structure of the plug 10 will be described with reference to FIGS. The stopper 10 includes an elastic stopper 11 made of a thermoplastic elastomer that allows a puncture needle to be inserted, and an outer frame 12 made of a thermoplastic synthetic resin that holds the elastic stopper 11 in a close contact state. Yes.

  The elastic plug 11 has a substantially truncated cone shape as a whole, and has a substantially truncated cone-shaped convex portion 11a at the center of the upper surface, and three substantially inverted conical concave portions 11b on the upper surface of the convex portion 11a. Have. These recesses 11b serve as position indexes when a puncture needle is inserted into the elastic stopper 11 from the outside. The elastic plug 11 has a plurality (four in the figure) engaged portions 11c at the lower end portion of the outer peripheral surface. Each engaged portion 11c is formed of a concave portion having a substantially inverted L-shaped cross section, each lower end is opened at the bottom surface of the elastic plug 11, and each side surface is opened at the outer peripheral surface of the elastic plug 11. .

  The material of the elastic plug 11 is not particularly limited as long as it is a thermoplastic elastomer. For example, one material such as olefin, styrene, polyurethane, polyester, polyvinyl chloride, polybutadiene, polyamide, polyurethane, or the like may be used. Two or more kinds can be used as appropriate.

  The outer frame 12 has a substantially cylindrical shape as a whole, and has a substantially columnar lower cavity 12a and a substantially frustoconical upper cavity 12b continuously through a step 12c. The outer frame 12 has an annular flange 12d at the lower end portion of the outer peripheral surface, and an annular protrusion 12e having a substantially V-shaped cross section on the lower surface of the annular flange 12d. Further, the outer frame 12 has an upper wall 12g having a substantially cylindrical hole 12f provided in the center at the upper end portion of the inner peripheral surface of the upper cavity 12b. It has an annular convex portion 12h.

  The material of the outer frame 12 is not particularly limited as long as it is a thermoplastic synthetic resin. For example, one or more of polypropylene, polyethylene, polyester, polyethylene terephthalate, polyvinyl chloride, polyolefin and the like can be used as appropriate.

  As can be seen from FIGS. 1 and 2, the elastic stopper 11 is located in the upper cavity 12b of the outer frame 12, and its outer peripheral surface (except for the side opening of each engaged portion 11c) is the upper cavity 12b. It is in close contact with the inner peripheral surface, and the outer part of the upper surface thereof is in close contact with the lower surface of the upper wall 12g. Further, the convex portion 11 a and the concave portion 11 b of the elastic plug 11 can be visually recognized from the outside through the hole 12 f of the outer frame 12.

  Next, with reference to FIG. 4, a state where the stopper 10 is attached to the mouth portion 13 of the infusion container will be described. The mouth portion 13 has a substantially cylindrical shape as a whole, and has an annular flange 13a on the outer peripheral surface. Incidentally, the outer diameter of the upper surface of the mouth portion 13 is slightly smaller than the outer diameter of the bottom surface of the elastic plug 11. Moreover, the material of the opening part 13 will not be specifically limited if it is a thermoplastic synthetic resin, The material of the outer frame 12 mentioned above etc. can be used suitably.

  When attaching the plug body 10 to the mouth portion 13, the portion above the annular flange 13a of the mouth portion 13 is inserted into the lower cavity 12a of the outer frame 12, and the annular convex portion 12e of the outer frame 12 is used. Then, the outer frame 12 is fixed to the mouth portion 13 by a technique such as ultrasonic welding or heat welding. In this fixed state, the upper surface of the mouth portion 13 is in contact with the lower portion of each engaged portion 11c on the bottom surface of the elastic plug 11, and presses each lower portion slightly upward.

  Next, with reference to FIG. 5 (A) to FIG. 5 (C), a method of manufacturing the plug body 10 by the two-color molding method and a method of manufacturing the plug body 10 by the insert molding method will be described in order. 5A to 5C, only the elastic stopper 11 and the outer frame 12 are hatched for convenience of illustration.

  When the plug body 10 is manufactured by the two-color molding method, as shown in FIG. 5A, a male mold (core) 111 and a first female mold (cavity) 112 for producing the elastic plug 11 are used. Tighten. Then, the molding material MS11 for the elastic plug 11 defined between them is filled with a molten material corresponding to the elastic plug 11, and then pressure holding and cooling are performed to produce the elastic plug 11. Since the male mold 111 is provided with an engaging portion 111a having a shape corresponding to each engaged portion 11c of the elastic plug 11, the elastic plug 11 has a plurality of engaged portions shown in FIGS. Part 11c is formed.

  Subsequently, as shown in FIG. 5B, the mold 111 and the first female mold 112 are opened. Since the plurality of engaged portions 11 c formed on the elastic plug 11 are engaged with the respective engaging portions 111 a of the male mold 111, the elastic plug 11 is left behind in the first female mold 112 when the mold is opened. Is suppressed.

  Subsequently, as shown in FIG. 5C, after the first female die 112 is replaced with another second female die (cavity) 113 for producing the outer frame 12, the male die 111 and The second female mold 113 is clamped. Incidentally, the replacement here is performed by providing two male molds 111 on the rotary table so as to face each of the first female mold 112 and the second female mold 113 provided, and after opening the mold, This is performed by a method of rotating the rotary table by 180 degrees. Then, the molding material MS12 for the outer frame 12 defined between the two is filled with a molten material corresponding to the outer frame 12, and then pressure holding and cooling are performed, so that the elastic plug 11 having the engaged portion 11c is obtained. The outer frame 12 held in close contact is produced.

  Subsequently, the male mold 111 and the second female mold 113 are opened, and the plug 10 shown in FIGS. 1 and 2 is taken out. At this time, each engaged portion 11c of the elastic plug 11 is forcibly removed from the engaging portion 111a of the male mold 111. However, since each engaged portion 11c has elasticity unique to the thermoplastic elastomer, The engaged portion 11c is not damaged such as cracks or chips. When there is a concern about the above-mentioned damage when forcibly removing or for reducing the forcible extraction force, the elastic plug 11 is formed by appropriately rounding or chamfering the corner of the engaging portion 111a of the male mold 111. In particular, it is preferable that each engaged portion 11c to be rounded or tapered at the inner corner portion. Then, the plug body 10 is washed in order to remove impurities, dirt, and the like that are not attached to the plug body 10 taken out.

  On the other hand, when the plug body 10 is manufactured by the insert molding method, as shown in FIG. 5A, the male mold (core) 111 and the first female mold (cavity) 112 for producing the elastic plug 11 are formed. Clamp the mold. Then, the molding material MS11 for the elastic plug 11 defined between them is filled with a molten material corresponding to the elastic plug 11, and then pressure holding and cooling are performed to produce the elastic plug 11. Since the male mold 111 is provided with an engaging portion 111a having a shape corresponding to each engaged portion 11c of the elastic plug 11, the elastic plug 11 has a plurality of engaged portions shown in FIGS. Part 11c is formed.

  Subsequently, as shown in FIG. 5B, the male mold 111 and the first female mold 112 are opened, and the elastic stopper 11 is taken out. Since the plurality of engaged portions 11 c formed on the elastic plug 11 are engaged with the respective engaged portions 111 a of the male mold 111, the elastic plug 11 is left behind in the first female mold 112 when the mold is opened. That is suppressed. In addition, each engaged portion 11c of the elastic stopper 11 is forcibly removed from the engaging portion 111a of the male mold 111 at the time of taking out, but each engaged portion 11c has elasticity unique to a thermoplastic elastomer, No damage such as cracks or chipping occurs in each engaged portion 11c. When there is a concern about the above-mentioned damage when forcibly removing or for reducing the forcible extraction force, the elastic plug 11 is formed by appropriately rounding or chamfering the corner of the engaging portion 111a of the male mold 111. In particular, it is preferable that each engaged portion 11c to be rounded or tapered at the inner corner portion.

  Subsequently, the elastic plug 11 is inserted into the male mold 111 (refers to another male mold (core) having the same shape as the male mold 111 used when the elastic plug 11 is produced). At the time of this insertion, if the male mold 111 has an engaging portion, a plurality of engaged portions 11 c formed on the elastic plug 11 are engaged with the engaging portions 111 a of the male die 111. In addition, the male mold | type 111 may not have an engaging part.

  Subsequently, as shown in FIG. 5C, the male mold 111 with the elastic plug 11 inserted therein and another second female mold (cavity) 113 for producing the outer frame 12 are clamped. . Then, the outer frame 12 molding space MS12 defined between the two is filled with a molten material corresponding to the outer frame 12, and after that, holding and cooling are performed, and the elastic plug 11 is held in a tight contact state. The frame 12 is produced.

  Subsequently, the male mold 111 and the second female mold 113 are opened, and the plug 10 shown in FIGS. 1 and 2 is taken out. At this time, each engaged portion 11c of the elastic plug 11 is forcibly removed from the engaging portion 111a of the male mold 111. However, since each engaged portion 11c has elasticity unique to the thermoplastic elastomer, The engaged portion 11c is not damaged such as cracks or chips. The countermeasures when the above-mentioned damage is concerned at the time of forcible removal or when the forcible removal force is reduced are as described above. Then, the plug body 10 is washed in order to remove impurities, dirt, and the like that are not attached to the plug body 10 taken out.

  In the manufacturing method of the plug 10 described above, in the elastic plug manufacturing process, the engaged portion 11c is formed on the elastic plug 11 using the male mold 111 having the engaging portion 111a, and the engaged Since the mold opening is performed with the portion 11c engaged with the engaging portion 111a of the male mold 111, the occurrence of the phenomenon that the elastic plug 11 is left behind in the first female mold 112 when the mold is opened is reduced. Can do.

<< Second Embodiment >>
First, the structure of the plug 20 will be described with reference to FIGS. The stopper 20 includes an elastic stopper 21 made of a thermoplastic elastomer that allows a puncture needle to be inserted, and an outer frame 22 made of a thermoplastic synthetic resin that holds the elastic stopper 21 in a close contact state. Yes.

  The elastic plug 21 has a substantially truncated cone shape as a whole, and has a substantially truncated cone-shaped convex portion 21a at the center of the upper surface, and three generally inverted conical concave portions 21b on the upper surface of the convex portion 21a. Have. These recesses 21b serve as position indicators when the puncture needle is inserted into the elastic stopper 21 from the outside. The elastic plug 21 has a plurality (eight in the figure) engaged portions 21c at the lower end portion of the outer peripheral surface. Each engaged portion 21c is formed of a concave portion having a substantially trapezoidal cross section (the upper base is longer than the lower base), each lower end is opened at the bottom surface of the elastic plug 21, and each side surface is an elastic plug 21. It is open at the outer peripheral surface. Since the material of the elastic plug 21 is as described in the first embodiment column, its description is omitted here.

  The outer frame 22 has a substantially cylindrical shape as a whole, and has a substantially columnar lower cavity 22a and a substantially frustoconical upper cavity 22b continuously through a step 22c. Further, the outer frame 22 has an annular flange 22d on the lower side in the vertical direction of the outer peripheral surface, and has an annular protrusion 22e having a substantially V-shaped cross section on the lower surface of the annular flange 22d. Further, the outer frame 22 has an upper wall 22g having a substantially cylindrical hole 22f provided in the center at the upper end portion of the inner peripheral surface of the upper cavity 22b. It has an annular convex portion 22h. Since the material of the outer frame 22 is as described in the first embodiment column, description thereof is omitted here.

  As can be seen from FIGS. 6 and 7, the elastic plug 21 is located in the upper cavity 22b of the outer frame 22, and its outer peripheral surface (excluding the side opening of each engaged portion 21c) is the upper cavity 22b. It is in close contact with the inner peripheral surface, and the outer portion of the upper surface thereof is in close contact with the lower surface of the upper wall 22g. Further, the convex portion 21 a and the concave portion 21 b of the elastic plug 21 are visible from the outside through the holes 22 f of the outer frame 22.

  Next, a state where the stopper 20 is attached to the mouth 23 of the infusion container will be described with reference to FIG. The mouth portion 23 has a substantially cylindrical shape as a whole, and has an annular flange 23a having a substantially inverted L-shaped cross section on the outer peripheral surface. Incidentally, the outer diameter of the upper surface of the mouth portion 23 is slightly smaller than the outer diameter of the bottom surface of the elastic plug 21. Moreover, the material of the opening part 23 will not be specifically limited if it is a thermoplastic synthetic resin, The material of the outer frame 22 mentioned above etc. can be used suitably.

  When attaching the plug body 20 to the mouth portion 23, a portion of the mouth portion 23 above the annular flange 23a is inserted into the lower cavity 22a of the outer frame 22, and the annular convex portion 22e of the outer frame 22 is used. Then, the outer frame 22 is fixed to the mouth 23 by a technique such as ultrasonic welding or heat welding. In this fixed state, the upper surface of the mouth portion 23 is in contact with the lower portion of each engaged portion 21c on the bottom surface of the elastic plug 21, and presses each lower portion slightly upward.

  Next, with reference to FIG. 10 (A) to FIG. 10 (C), a method of manufacturing the plug body 20 by the two-color molding method and a method of manufacturing the plug body 20 by the insert molding method will be described in order. 10 (A) to 10 (C), only the elastic stopper 21 and the outer frame 22 are hatched for convenience of illustration.

  When the plug body 20 is manufactured by the two-color molding method, as shown in FIG. 10A, a male mold (core) 121 and a first female mold (cavity) 122 for producing the elastic plug 21 are used. Tighten. Then, the molding material MS21 for the elastic plug 21 defined between them is filled with a molten material corresponding to the elastic plug 21, and then pressure holding and cooling are performed to produce the elastic plug 21. Since the male mold 121 is provided with an engaging portion 121a having a shape corresponding to each engaged portion 21c of the elastic plug 21, the elastic plug 21 has a plurality of engaged portions shown in FIGS. Part 21c is formed.

  Subsequently, as shown in FIG. 10B, the male mold 121 and the first female mold 122 are opened. Since the plurality of engaged portions 21 c formed on the elastic plug 21 are engaged with the respective engaging portions 121 a of the male mold 121, the elastic plug 21 is left behind in the first female mold 122 when the mold is opened. Is suppressed.

  Subsequently, as shown in FIG. 10C, after the first female mold 122 is replaced with another second female mold (cavity) 123 for producing the outer frame 22, the male mold 121 and The second female mold 123 is clamped. Incidentally, the replacement here is performed by providing two male molds 121 on the rotary table so as to face each of the first female mold 122 and the second female mold 123 provided, and after the mold opening, This is performed by a method of rotating the rotary table by 180 degrees. Then, a molding material MS22 for the outer frame 22 defined between the two is filled with a molten material corresponding to the outer frame 22, and then pressure holding and cooling are performed, so that the elastic plug 21 having the engaged portion 21c is obtained. The outer frame 22 held in a close contact state is produced.

  Subsequently, the male mold 121 and the second female mold 123 are opened, and the plug body 20 shown in FIGS. 6 and 7 is taken out. At this time, each engaged portion 21c of the elastic plug 21 is forcibly removed from the engaging portion 121a of the male mold 121. However, each engaged portion 21c has elasticity unique to the thermoplastic elastomer, The engaged portion 21c is not damaged such as a crack or a chip. When there is a concern about the above-mentioned damage when forcibly removing or for reducing the forcibly removing force, the elastic plug 21 is formed by appropriately rounding or chamfering the corner of the engaging portion 121a of the male die 121. It is preferable that the engaged portion 21c is rounded or tapered, particularly at the inner corner. Then, in order to remove impurities, dirt, and the like that are not attached to the removed plug body 20, the plug body 20 is washed.

  On the other hand, when the plug body 20 is manufactured by the insert molding method, as shown in FIG. 10A, the male mold (core) 121 and the first female mold (cavity) 122 for producing the elastic plug 21 are formed. Clamp the mold. Then, the molding material MS21 for the elastic plug 21 defined between them is filled with a molten material corresponding to the elastic plug 21, and then pressure holding and cooling are performed to produce the elastic plug 21. Since the male mold 121 is provided with an engaging portion 121a having a shape corresponding to each engaged portion 21c of the elastic plug 21, the elastic plug 21 has a plurality of engaged portions shown in FIGS. Part 21c is formed.

  Subsequently, as shown in FIG. 10B, the male mold 121 and the first female mold 122 are opened, and the elastic stopper 21 is taken out. Since the plurality of engaged portions 21c formed on the elastic plug 21 are engaged with the respective engaged portions 121a of the male mold 121, the elastic plug 21 is left behind in the first female mold 122 when the mold is opened. That is suppressed. In addition, each engaged portion 21c of the elastic plug 21 is forcibly removed from the engaging portion 121a of the male mold 121 at the time of removal, but each engaged portion 21c has elasticity unique to the thermoplastic elastomer, No damage such as a crack or chipping occurs in each engaged portion 21c. When there is a concern about the above-mentioned damage when forcibly removing or for reducing the forcibly removing force, the elastic plug 21 is formed by appropriately rounding or chamfering the corner of the engaging portion 121a of the male die 121. It is preferable that the engaged portion 21c is rounded or tapered, particularly at the inner corner.

  Subsequently, the elastic plug 21 is inserted into the male mold 121 (refers to another male mold (core) having the same shape as the male mold 121 used when the elastic plug 21 is manufactured). At the time of this insertion, if the male mold 121 has an engaging portion, the plurality of engaged portions 21 c formed on the elastic plug 21 are engaged with the respective engaging portions 121 a of the male mold 121. Note that the male mold 121 may not have an engaging portion.

  Subsequently, as shown in FIG. 10C, the male mold 121 with the elastic plug 21 inserted therein and another second female mold (cavity) 123 for producing the outer frame 22 are clamped. . Then, the outer frame 22 molding space MS22 defined between the two is filled with a molten material corresponding to the outer frame 22, and then pressure holding and cooling are performed, and the elastic plug 21 is held tightly. The frame 22 is produced.

  Subsequently, the male mold 121 and the second female mold 123 are opened, and the plug body 20 shown in FIGS. 6 and 7 is taken out. At this time, each engaged portion 21c of the elastic plug 21 is forcibly removed from the engaging portion 121a of the male mold 121. However, each engaged portion 21c has elasticity unique to the thermoplastic elastomer, The engaged portion 21c is not damaged such as a crack or a chip. The countermeasures when the above-mentioned damage is concerned at the time of forcible removal or when the forcible removal force is reduced are as described above. Then, in order to remove impurities, dirt, and the like that are not attached to the removed plug body 20, the plug body 20 is washed.

  In the manufacturing method of the plug body 20 described above, in the elastic plug manufacturing step, the engaged portion 21c is formed in the elastic plug 21 using the male mold 121 having the engaging portion 121a, and the engaged portion Since the mold opening is performed while the portion 21c is engaged with the engaging portion 121a of the male mold 121, the occurrence of the phenomenon that the elastic plug 21 is left behind in the first female mold 122 when the mold is opened is reduced. Can do.

<< Third Embodiment >>
First, the structure of the plug 30 will be described with reference to FIGS. The plug 30 includes an elastic plug 31 made of a thermoplastic elastomer that allows the puncture needle to be inserted, and an outer frame 32 made of a thermoplastic synthetic resin that holds the elastic plug 31 in a close contact state. Yes.

  The elastic plug 31 has a substantially cylindrical shape as a whole, and has a substantially truncated cone-shaped convex portion 31a at the center of the upper surface, and has three generally inverted conical concave portions 31b on the upper surface of the convex portion 31a. doing. These recesses 31b serve as position indicators when a puncture needle is inserted into the elastic plug 31 from the outside. Further, the elastic plug 31 has a substantially annular engaged portion 31c at the lower end portion of the outer peripheral surface. The engaged portion 31c is formed of an annular recess having a substantially pentagonal cross section (the depth with respect to the outer peripheral surface being the shallowest at the center in the vertical direction), and the lower end thereof opens at the bottom surface of the elastic plug 31, and The side surface opens at the outer peripheral surface of the elastic plug 31. Since the material of the elastic plug 31 is as described in the first embodiment column, description thereof is omitted here.

  The outer frame 32 has a substantially cylindrical shape as a whole, and has a substantially columnar lower cavity 32a and a substantially columnar upper cavity 32b continuously through a substantially truncated cone-shaped step 32c. ing. The outer frame 32 has an annular flange 32d at the lower end portion of the outer peripheral surface, and an annular protrusion 32e having a substantially V-shaped cross section on the lower surface of the annular flange 32d. Further, the outer frame 32 has an upper wall 32g having a substantially cylindrical hole 32f provided in the center at the upper end portion of the inner peripheral surface of the upper cavity 32b, and a cross section is substantially on the upper surface of the upper wall 32g. It has an annular convex portion 32h. Since the material of the outer frame 32 is as described in the first embodiment column, the description is omitted here.

  As can be seen from FIGS. 11 and 12, the elastic plug 31 is located in the upper cavity 32b of the outer frame 32, and its outer peripheral surface (excluding the side opening of the engaged portion 31c) is located in the upper cavity 32b. It is in close contact with the peripheral surface, and the outer portion of the upper surface thereof is in close contact with the lower surface of the upper wall 32g. Further, the convex portion 31 a and the concave portion 31 b of the elastic plug 31 can be visually recognized from the outside through the hole 32 f of the outer frame 32.

  Next, a state in which the stopper 30 is attached to the mouth portion 33 of the infusion container will be described with reference to FIG. The mouth portion 33 has a substantially cylindrical shape as a whole, and has an annular flange 33a on the outer peripheral surface. Incidentally, the outer diameter of the upper surface of the mouth portion 33 is slightly smaller than the outer diameter of the elastic plug 31, and the inner diameter of the upper surface of the mouth portion 33 is the deepest (the outer peripheral surface of the engaged portion 31 c of the elastic plug 31 is (Reference depth) is slightly larger than or substantially the same as the outer diameter of the shallowest portion. The material of the mouth portion 33 is not particularly limited as long as it is a thermoplastic synthetic resin, and the material of the outer frame 32 described above can be used as appropriate.

  When attaching the plug body 30 to the mouth portion 33, the upper portion of the mouth portion 33 above the annular flange 33a is inserted into the lower cavities 32a, 32c of the outer frame 32 and the lower ends of the upper cavities 32b. The outer frame 32 is fixed to the mouth 33 by a technique such as ultrasonic welding or heat welding using the annular projection 32e of the frame 32. In this fixed state, the upper surface of the mouth portion 33 enters the engaged portion 31c of the elastic plug 31, contacts the inner upper surface of the engaged portion 31c, and presses the inner upper surface slightly upward. Yes.

  Next, with reference to FIGS. 15A to 15C, a method of manufacturing the plug 30 by the two-color molding method and a method of manufacturing the plug body 30 by the insert molding method will be described in order. 15A to 15C, only the elastic stopper 31 and the outer frame 32 are hatched for convenience of illustration.

  When the plug body 30 is manufactured by the two-color molding method, as shown in FIG. 15A, a male mold (core) 131 and a first female mold (cavity) 132 for producing the elastic plug 31 are used. Tighten. Then, the elastic plug 31 molding space MS31 defined between them is filled with a molten material corresponding to the elastic plug 31, and then pressure holding and cooling are performed to produce the elastic plug 31. Since the male mold 131 is provided with an engaging portion 131a having a shape corresponding to the engaged portion 31c of the elastic plug 31, the engaged portion 31c shown in FIGS. Is done.

  Subsequently, as shown in FIG. 15B, the male mold 131 and the first female mold 132 are opened. Since the engaged portion 31c formed on the elastic plug 31 is engaged with the engaging portion 131a of the male mold 131, the elastic plug 31 is prevented from being left behind by the first female mold 132 when the mold is opened. .

  Subsequently, as shown in FIG. 15C, after the first female mold 132 is replaced with another second female mold (cavity) 133 for producing the outer frame 32, the male mold 131 and The second female mold 133 is clamped. Incidentally, the replacement here is performed by providing two male molds 131 on the rotary table so as to face each of the first female mold 132 and the second female mold 133 provided side by side, and after the mold opening, This is performed by a method of rotating the rotary table by 180 degrees. Then, the outer frame 32 molding space MS32 defined between them is filled with a molten material corresponding to the outer frame 32, and then the pressure holding and cooling are performed, so that the elastic plug 31 having the engaged portion 31c is obtained. The outer frame 32 held in a close contact state is produced.

  Subsequently, the male mold 131 and the second female mold 133 are opened, and the plug 30 shown in FIGS. 11 and 12 is taken out. At this time, the engaged portion 31c of the elastic plug 31 is forcibly removed from the engaging portion 131a of the male die 131. However, since the engaged portion 31c has elasticity unique to the thermoplastic elastomer, The portion 31c is not damaged such as a crack or a chip. When there is a concern about the above-mentioned damage when forcibly removing or for reducing the forcibly removing force, the elastic plug 31 is formed by appropriately rounding or chamfering the corner of the engaging portion 131a of the male mold 131. It is preferable that the engaged portion 31c, in particular, be rounded or tapered at the inner corner. Then, in order to remove impurities, dirt, and the like that are not attached to the plug 30 that has been taken out, the plug 30 is washed.

  On the other hand, when the plug body 30 is manufactured by the insert molding method, as shown in FIG. 15A, the male mold (core) 131 and the first female mold (cavity) 132 for producing the elastic plug 31 are formed. Clamp the mold. Then, the elastic plug 31 molding space MS31 defined between them is filled with a molten material corresponding to the elastic plug 31, and then pressure holding and cooling are performed to produce the elastic plug 31. Since the male mold 131 is provided with an engaging portion 131a having a shape corresponding to the engaged portion 31c of the elastic plug 31, the engaged portion 31c shown in FIGS. Is done.

  Subsequently, as shown in FIG. 15B, the male mold 131 and the first female mold 132 are opened, and the elastic plug 31 is taken out. Since the engaged portion 31c formed on the elastic plug 31 is engaged with the engaging portion 131a of the male mold 131, the elastic plug 31 is prevented from being left behind by the first female mold 132 when the mold is opened. . In addition, the engaged portion 31c of the elastic plug 31 is forcibly removed from the engaging portion 131a of the male mold 131 at the time of taking out, but the engaged portion 31c has elasticity unique to the thermoplastic elastomer, so The joint portion 31c is not damaged such as a crack or chip. When there is a concern about the above-mentioned damage when forcibly removing or for reducing the forcibly removing force, the elastic plug 31 is formed by appropriately rounding or chamfering the corner of the engaging portion 131a of the male mold 131. It is preferable that the engaged portion 31c, in particular, be rounded or tapered at the inner corner.

  Subsequently, the elastic plug 31 is inserted into the male mold 131 (refers to another male mold (core) having the same shape as the male mold 131 used when the elastic plug 31 is manufactured). At the time of this insertion, when the male mold 131 has an engaging portion, the engaged portion 31c formed on the elastic plug 31 is engaged with the engaging portion 131a of the male die 131. The male mold 131 may not have an engaging portion.

  Subsequently, as shown in FIG. 15C, the male mold 131 with the elastic plug 31 inserted therein and another second female mold (cavity) 133 for producing the outer frame 32 are clamped. . Then, the outer frame 32 molding space MS32 defined between the two is filled with a molten material corresponding to the outer frame 32, and thereafter, holding and cooling are performed, and the elastic plug 31 is held tightly. The frame 32 is produced.

  Subsequently, the male mold 131 and the second female mold 133 are opened, and the plug 30 shown in FIGS. 11 and 12 is taken out. At this time, the engaged portion 31c of the elastic plug 31 is forcibly removed from the engaging portion 131a of the male die 131. However, since the engaged portion 31c has elasticity unique to the thermoplastic elastomer, The portion 31c is not damaged such as a crack or a chip. The countermeasures when the above-mentioned damage is concerned at the time of forcible removal or when the forcible removal force is reduced are as described above. Then, in order to remove impurities, dirt, and the like that are not attached to the plug 30 that has been taken out, the plug 30 is washed.

  In the method of manufacturing the plug body 30 described above, in the elastic plug manufacturing step, the engaged portion 31c is formed on the elastic plug 31 using the male mold 131 having the engaging portion 131a, and the engaged portion is engaged. Since the mold opening is performed with the portion 31c engaged with the engaging portion 121a of the male mold 121, the occurrence of the phenomenon that the elastic plug 31 is left behind in the first female mold 132 when the mold is opened is reduced. Can do.

<< 4th Embodiment >>
First, the structure of the plug 40 will be described with reference to FIGS. The stopper 40 includes an elastic stopper 41 made of a thermoplastic elastomer that allows a puncture needle to pass through, and an outer frame 42 made of a thermoplastic synthetic resin that holds the elastic stopper 41 in a close contact state. Yes.

  The elastic plug 41 has a substantially truncated cone shape as a whole, and has a substantially truncated cone-shaped convex portion 41a at the center of the upper surface, and three generally inverted conical concave portions 41b on the upper surface of the convex portion 41a. Have. These concave portions 41b serve as position indices when a puncture needle is inserted into the elastic stopper 41 from the outside. Further, the elastic plug 41 has an engaged portion 41c on the bottom surface. The engaged portion 41 c is formed of a substantially inverted truncated cone-shaped recess, and its lower end is opened at the bottom surface of the elastic plug 41. Since the material of the elastic plug 41 is as described in the first embodiment column, description thereof is omitted here.

  The entire outer frame 42 has a substantially cylindrical shape, and has a substantially columnar lower cavity 42a and a substantially truncated cone-shaped upper cavity 42b continuously in the inside. The outer frame 42 has an annular flange 42c at the lower end portion of the outer peripheral surface, and an annular protrusion 42d having a substantially V-shaped cross section on the lower surface of the annular flange 42c. Further, the outer frame 42 has an upper wall 42f with a substantially cylindrical hole 42e provided in the center at the upper end portion of the inner peripheral surface of the upper cavity 42b. It has an annular convex portion 42g. Since the material of the outer frame 42 is the same as that described in the first embodiment column, its description is omitted here.

  As can be seen from FIGS. 16 and 17, the elastic plug 41 is located in the upper cavity 42 b of the outer frame 42, its outer peripheral surface is in close contact with the inner peripheral surface of the upper cavity 42 b, and outside the upper surface thereof. The portion is in close contact with the lower surface of the upper wall 42f. Further, the convex portion 41 a and the concave portion 41 b of the elastic plug 41 are visible from the outside through the hole 42 e of the outer frame 42.

  Next, a state in which the stopper 40 is attached to the mouth portion 43 of the infusion container will be described with reference to FIG. The mouth portion 43 has a substantially cylindrical shape as a whole, and has an annular flange 43a on the outer peripheral surface. Incidentally, the outer diameter of the upper surface of the mouth part 43 is slightly smaller than the outer diameter of the bottom surface of the elastic plug 41. The material of the mouth portion 43 is not particularly limited as long as it is a thermoplastic synthetic resin, and the material of the outer frame 42 described above can be used as appropriate.

  When the plug 40 is attached to the mouth portion 43, the upper portion of the mouth portion 43 above the annular flange 43a is inserted into the lower cavity 42a of the outer frame 42, and the annular convex portion 42d of the outer frame 42 is used. Then, the outer frame 42 is fixed to the mouth portion 43 by a technique such as ultrasonic welding or heat welding. In this fixed state, the upper surface of the mouth portion 43 is in contact with the outer portion of the engaged portion 41 c on the bottom surface of the elastic plug 41 and presses the outer portion slightly upward.

  Next, with reference to FIG. 20 (A) to FIG. 20 (C), a method of manufacturing the plug body 40 by the two-color molding method and a method of manufacturing the plug body 40 by the insert molding method will be described in order. 20A to 20C, only the elastic stopper 41 and the outer frame 42 are hatched for convenience of illustration.

  When the plug body 40 is manufactured by a two-color molding method, as shown in FIG. 20A, a mold of a male mold (core) 141 and a first female mold (cavity) 142 for producing the elastic plug 41 is used. Tighten. Then, the elastic plug 41 is manufactured by filling the molding space MS41 for the elastic plug 41 defined between them with a molten material corresponding to the elastic plug 41, and then performing pressure holding and cooling. Since the male mold 141 is provided with an engaging portion 141a having a shape corresponding to the engaged portion 41c of the elastic plug 41, the engaged portion 41c shown in FIGS. Is done.

  Subsequently, as shown in FIG. 20B, the male mold 141 and the first female mold 142 are opened. Since the engaged portion 41 c formed on the elastic plug 41 is engaged with the engaging portion 141 a of the male die 141, the elastic plug 41 is prevented from being left behind by the first female die 142 when the die is opened. .

  Subsequently, as shown in FIG. 20C, after the first female die 142 is replaced with another second female die (cavity) 143 for producing the outer frame 42, the male die 141 and The second female mold 143 is clamped. Incidentally, the replacement here is performed by providing two male molds 141 on the rotary table so as to face each of the first female mold 142 and the second female mold 143 provided side by side, and after opening the mold. This is performed by a method of rotating the rotary table by 180 degrees. Then, the molding material MS42 for the outer frame 42 defined between the two is filled with a molten material corresponding to the outer frame 42, and then pressure holding and cooling are performed, so that the elastic plug 41 having the engaged portion 41c is obtained. The outer frame 42 held in a close contact state is produced.

  Subsequently, the male mold 141 and the second female mold 143 are opened, and the plug 40 shown in FIGS. 16 and 17 is taken out. At this time, the engaged portion 41c of the elastic plug 41 is forcibly removed from the engaging portion 141a of the male die 141. However, since the engaged portion 41c has elasticity unique to the thermoplastic elastomer, The part 41c is not damaged such as a crack or chip. When there is a concern about the above-mentioned damage when forcibly removing or for reducing the forcibly removing force, the elastic plug 41 is formed by appropriately rounding or chamfering the corners of the engaging portion 141a of the male die 141. In particular, it is preferable that each engaged portion 41c is rounded or tapered at the inner corner. Then, in order to remove impurities, dirt, etc. that are not attached to the plug 40 taken out, the plug 40 is washed.

  On the other hand, when the plug body 40 is manufactured by the insert molding method, as shown in FIG. 20A, the male mold (core) 141 and the first female mold (cavity) 142 for producing the elastic plug 41 are formed. Clamp the mold. Then, the elastic plug 41 is manufactured by filling the molding space MS41 for the elastic plug 41 defined between them with a molten material corresponding to the elastic plug 41, and then performing pressure holding and cooling. Since the male mold 141 is provided with an engaging portion 141a having a shape corresponding to the engaged portion 41c of the elastic plug 41, the engaged portion 41c shown in FIGS. Is done.

  Subsequently, as shown in FIG. 20B, the male die 141 and the first female die 142 are opened, and the elastic stopper 41 is taken out. Since the engaged portion 41c formed on the elastic plug 41 is engaged with the engaged portion 141a of the male die 141, the elastic plug 41 is prevented from being left behind by the first female die 142 when the die is opened. The In addition, the engaged portion 41c of the elastic plug 41 is forcibly removed from the engaging portion 141a of the male die 141 at the time of removal, but the engaged portion 41c has elasticity unique to the thermoplastic elastomer, so The joint portion 41c is not damaged such as a crack or a chip. When there is a concern about the above-mentioned damage when forcibly removing or for reducing the forcibly removing force, the elastic plug 41 is formed by appropriately rounding or chamfering the corners of the engaging portion 141a of the male die 141. The engaged portion 41c is preferably rounded or tapered at the inner corner.

  Subsequently, the elastic plug 41 is inserted into the male mold 141 (which indicates another male mold (core) having the same shape as the male mold 141 used when the elastic plug 41 is manufactured). At the time of this insertion, if the male die 141 has an engaging portion, the engaged portion 41c formed on the elastic plug 41 is engaged with the engaging portion 141a of the male die 141. Note that the male mold 141 may not have an engaging portion.

  Subsequently, as shown in FIG. 20C, the male die 141 with the elastic plug 41 inserted therein and another second female die (cavity) 143 for producing the outer frame 42 are clamped. . The outer frame 42 molding space MS 42 defined between the two is filled with a molten material corresponding to the outer frame 42, and then holding and cooling are performed so that the elastic plug 41 is held tightly. The frame 42 is produced.

  Subsequently, the male mold 141 and the second female mold 143 are opened, and the plug 40 shown in FIGS. 16 and 17 is taken out. At this time, the engaged portion 41c of the elastic plug 41 is forcibly removed from the engaging portion 141a of the male die 141. However, since the engaged portion 41c has elasticity unique to the thermoplastic elastomer, The part 41c is not damaged such as a crack or chip. The countermeasures when the above-mentioned damage is concerned at the time of forcible removal or when the forcible removal force is reduced are as described above. Then, in order to remove impurities, dirt, etc. that are not attached to the plug 40 taken out, the plug 40 is washed.

  In the method of manufacturing the plug 40 described above, in the elastic plug manufacturing step, the engaged portion 41c is formed on the elastic plug 41 using the male die 141 having the engaging portion 141a, and the engaged portion is engaged. Since the mold opening is performed while the portion 41c is engaged with the engaging portion 141a of the male die 141, the occurrence of the phenomenon that the elastic plug 41 is left behind in the first female die 142 when the die is opened is reduced. Can do.

"Test results"
Here, regarding the manufacturing method described in the first embodiment column to the fourth embodiment column, the elastic plugs 11, 21, 31, and 41 are the first female molds 112, 122, 132 when the mold is opened in the elastic plug manufacturing process. And the result of the test for confirming the occurrence rate of the phenomenon that is left behind in 142 will be described.

  In this test, the male mold 111 and the first female mold 112 according to FIG. 5 (A), the male mold 121 and the first female mold 122 according to FIG. 10 (A), and FIG. A male mold 131 and a first female mold 132 conforming to FIG. 20 and a male mold 141 and a first female mold 142 conforming to FIG. 20A are prepared, respectively, and using these, a hydrogenated styrene-based thermoplastic elastomer ( 100 elastic stoppers 11, 21, 31, and 41 made of SEBS) are produced, and the elastic stoppers 11, 21, 31, and 41 are left behind in the first female molds 112, 122, 132, and 142 when the mold is opened. The incidence of the phenomenon was confirmed.

  For comparison, the male mold 111 is replaced with a male mold without the engaging portion 111a, the male mold 121 is replaced with a male mold without the engaging portion 121a, and the male mold 131 is replaced with the engaging portion 131a. Instead of the male mold 141 having no engagement part 141a, the male mold 141 is replaced with a male mold having no engaging portion 141a, and 100 elastic plugs (4 types) made of the same material are produced one by one. The occurrence rate of the phenomenon that the type) is left in the first female molds 112, 122, 132, and 142 was confirmed.

  As a result of the test, the elastic plug 11 is left behind in the first female mold 112 when the mold is opened in the elastic plug manufacturing process when the male mold 111 and the first female mold 112 according to FIG. The occurrence rate of the phenomenon is 0%. On the other hand, when the male mold 111 is replaced with a male mold that does not have the engaging portion 111a, the elastic plug is the first female mold 112 when the elastic plug is formed in the elastic plug manufacturing process. The occurrence rate of the phenomenon that was left behind was 100%.

  In addition, the elastic plug 21 is left behind in the first female mold 122 when the mold is opened in the elastic plug manufacturing process using the male mold 121 and the first female mold 122 according to FIG. Is 30%. On the other hand, the elastic plug is the first female mold 122 when the mold is opened in the elastic plug manufacturing process when the male mold 121 is replaced with a male mold without the engaging portion 121a. The occurrence rate of the phenomenon that was left behind was 100%.

  Furthermore, the phenomenon that the elastic plug 31 is left behind in the first female mold 132 when the mold is opened in the elastic plug manufacturing process when the male mold 131 and the first female mold 132 according to FIG. The rate of occurrence of this is 0%. On the other hand, when the male mold 131 is replaced with a male mold having no engaging portion 131a, the elastic plug is the first female mold 132 when the mold is opened in the elastic plug manufacturing process. The occurrence rate of the phenomenon that was left behind was 100%.

  Further, the elastic plug 41 is left behind in the first female mold 142 when the mold is opened in the elastic plug manufacturing process using the male mold 141 and the first female mold 142 according to FIG. The rate of occurrence of the elastic plug is 80%. On the other hand, when the male mold 141 is replaced with a male mold without the engaging portion 141a, the elastic plug is the first female mold 142 when the mold is opened in the elastic plug manufacturing process. The occurrence rate of the phenomenon that was left behind was 100%.

  That is, in the manufacturing methods described in the first embodiment column to the fourth embodiment column, all of the elastic plugs 11, 21, 31 and 41 are the first female mold 112, when the mold is opened in the elastic plug manufacturing process. It has been confirmed that the occurrence of the phenomenon of being left behind by 122, 132 and 142 can be reduced.

  Considering based on the test results, the difference in the incidence (0%, 30%, 0%, 80%) is that the engaged plugs formed in the elastic plugs 11, 21, 31 and 41 in the elastic plug manufacturing process. It seems to be related to the shape and formation position of the portions 11c, 21c, 31c and 41c. That is, the number of corners of each of the engaged portions 11c, 21c, 31c, and 41c in each cross section (excluding corners that appear on the bottom surface but including rounded or tapered corners) is 4, The number of surfaces (excluding the surface appearing on the bottom surface) is 5, 3, 4, and 3, respectively. Further, with respect to the engaged portion 11c, two of the three inner corner portions (excluding the corner appearing on the outer peripheral surface) are located inward of the remaining one inner corner, and the engaged portion 21c has one inner corner (excluding the corner appearing on the outer peripheral surface), and one of the two inner corners (excluding the corner appearing on the outer peripheral surface) is one of the engaged portions 31c. It is located inward from the remaining one inner corner, and the engaged portion 41c has two inner corner portions (excluding the corner that appears on the bottom surface). That is, as for the incidence, the larger the number of corners and the number of surfaces, the more the numerical value is reduced, and the positional relationship between the inner corners and the inner corners adjacent to the inner corners. It is thought that it contributes to the numerical reduction. In addition, the length and angle of the surface are also considered to contribute to the numerical reduction.

<< Other embodiments >>
(1) In the first embodiment column to the fourth embodiment column, the elastic plugs 11, 21, 31 and 41 are provided with concave-type engaged portions 11c, 21c, 31c and 41c. As long as it corresponds to a recessed type engaged portion, even if the shape and forming position are different from the illustrated engaged portions 11c, 21c, 31c and 41c, the elastic plug making process is the same as described above. Occurrence of the phenomenon that the elastic plugs 11, 21, 31, and 41 are left behind in the first female molds 112, 122, 132, and 142 when the mold is opened can be reduced.

  (2) In the first embodiment column to the fourth embodiment column, the elastic plugs 11, 21, 31 and 41 are provided with the recessed type engaged portions 11c, 21c, 31c and 41c. Even if a portion corresponding to the engaged portion of the convex portion type is provided instead of the concave portion type, the elastic plugs 11, 21, 31, and 41 are the first female molds at the time of opening the mold in the elastic plug forming step as described above. It is possible to reduce the occurrence of a phenomenon that is left behind by 112, 122, 132, and 142. Incidentally, examples of the convex-type engaged portion include an annular convex portion having a polygonal cross section provided on the outer peripheral surface and the bottom surface of the elastic plug, a plurality of convex portions, and the like.

  (3) In the first embodiment column to the fourth embodiment column, the elastic plugs 11, 21, 31 and 41 are provided with convex portions 11a, 21a, 31a and 41a and three concave portions 11b, 21b, 31b and 41b. However, the number of the recesses 11b, 21b, 31b, and 41b may be increased or decreased as appropriate (for example, 1, 2, 4, 5, etc.) as necessary. Otherwise, the recesses 11b, 21b, 31b and 41b may be excluded from the elastic plugs 11, 21, 31 and 41. In addition, the convex portions 11a, 21a, 31a and 41a are excluded from the elastic plugs 11, 21, 31 and 41, and the concave portions 11b, 21b, 31b and 41b are provided on the upper surface of the elastic plugs 11, 21, 31 and 41. You can do it. Further, when the convex portions 11a, 21a, 31a and 41a are excluded, if there is no need to provide the concave portions 11b, 21b, 31b and 41b as described above, the convex portions 11a, 21a, 31a and 41a and the concave portion 11b, Both 21b, 31b and 41b may be excluded from the elastic plugs 11, 21, 31 and 41.

  10, 20, 30, 40 ... plug body, 11, 21, 31, 41 ... elastic stopper, 11c, 21c, 31c, 41c ... engaged portion, 12, 22, 32, 42 ... outer frame, 111, 121, 131, 141 ... male mold, 111a, 121a, 131, 141a ... engaging portion, 112, 122, 132, 142 ... first female mold, 113, 123, 133, 143 ... second female mold, MS11, MS21 , MS31, MS41 ... elastic cap molding space, MS12, MS22, MS32, MS42 ... outer frame molding space.

Claims (17)

A method for producing a stopper for an infusion container comprising an elastic stopper made of a thermoplastic elastomer that allows a puncture needle to pierce and an outer frame made of a thermoplastic synthetic resin that holds the elastic stopper in close contact. And
A male mold having an engaging portion for forming an engaged portion on the elastic plug, and a first female mold that defines an elastic plug molding space between the male mold and the male mold. Producing an elastic stopper having an engaging portion ;
An outer frame forming space for forming the outer frame in a state where the outer frame forming space for forming the outer frame is defined with the male mold or the elastic stopper is inserted into another male mold. And a step of producing the outer frame that does not engage with the engaged portion of the elastic plug, using a second female mold capable of defining the other male mold with the other male mold. Body manufacturing method.
  The method for producing a stopper for an infusion container according to claim 1, wherein the engaged portion of the elastic stopper is provided on an outer peripheral surface and / or a bottom surface of the elastic stopper.   The method for producing a stopper for an infusion container according to claim 1 or 2, wherein the engaged portion of the elastic stopper is constituted by at least one concave portion and / or convex portion.   The method for producing a plug for an infusion container according to any one of claims 1 to 3, wherein at least a part of the engaged portion of the elastic stopper is opened at a bottom surface of the elastic stopper. The engaged portion of the elastic plug is composed of a concave portion having a substantially inverted L-shaped cross section,
The lower end of the substantially inverted L-shaped recess opens at the bottom surface of the elastic plug,
Side of the generally inverted L-shaped recess, said you are open at the outer peripheral surface of the elastic plug, a manufacturing method of the infusion container plug body according to any one of claims 1-4. The engaged portion of the elastic plug is composed of a substantially trapezoidal concave portion whose upper base is longer than the lower base in a cross section,
The lower end of the substantially trapezoidal recess opens at the bottom of the elastic plug,
Side face of the recess of the substantially trapezoidal shape, wherein you are open at the outer peripheral surface of the elastic plug, a manufacturing method of the infusion container plug body according to any one of claims 1-4. The engaged portion of the elastic plug is composed of a substantially pentagonal annular concave portion whose depth with respect to the outer peripheral surface in the cross section is the shallowest at the center in the vertical direction,
The lower end of the substantially pentagonal annular recess opens at the bottom of the elastic plug,
The method for producing a plug for an infusion container according to any one of claims 1 to 4 , wherein a side surface of the substantially pentagonal annular recess is opened at an outer peripheral surface of the elastic stopper . The engaged portion of the elastic plug is composed of a substantially inverted truncated cone-shaped recess ,
The manufacturing method of the stopper for infusion containers of any one of Claims 1-4 with which the lower end of the said substantially inverted truncated cone-shaped recessed part is opened by the bottom face of the said elastic stopper . Said elastic stopper manufacturing process, Ru one step der in producing the infusion container plug body by two-color molding method, a manufacturing method of the infusion container plug body according to any one of claims 1-8 . The said elastic stopper preparation process is a manufacturing method of the stopper for infusion containers of any one of Claims 1-8 which is one process at the time of manufacturing the said stopper for infusion containers by the insert molding method. A stopper for an infusion container comprising an elastic stopper made of a thermoplastic elastomer that allows piercing of a puncture needle, and an outer frame made of a thermoplastic synthetic resin holding the elastic stopper in a close contact state,
The elastic plug has an engaged portion only on the outer peripheral surface and / or bottom surface of the elastic plug,
A stopper for an infusion container, wherein the engaged portion is provided in a disengaged state . The infusion container stopper according to claim 11, wherein the engaged portion of the elastic stopper is constituted by at least one concave portion and / or convex portion. The plug for an infusion container according to claim 11 or 12, wherein at least a part of the engaged portion of the elastic stopper is opened at a bottom surface of the elastic stopper. The engaged portion of the elastic plug is composed of a concave portion having a substantially inverted L-shaped cross section,
  The lower end of the substantially inverted L-shaped recess opens at the bottom surface of the elastic plug,
  The stopper for an infusion container according to any one of claims 11 to 13, wherein a side surface of the substantially inverted L-shaped recess is opened at an outer peripheral surface of the elastic stopper. The engaged portion of the elastic plug is composed of a substantially trapezoidal concave portion whose upper base is longer than the lower base in a cross section,
  The lower end of the substantially trapezoidal recess opens at the bottom surface of the elastic stopper,
  The plug body for an infusion container according to any one of claims 11 to 13, wherein a side surface of the substantially trapezoidal concave portion is opened at an outer peripheral surface of the elastic plug. The engaged portion of the elastic plug is composed of a substantially pentagonal annular concave portion whose depth with respect to the outer peripheral surface in the cross section is the shallowest at the center in the vertical direction,
  The lower end of the substantially pentagonal annular recess opens at the bottom surface of the elastic plug,
  The stopper for an infusion container according to any one of claims 11 to 13, wherein a side surface of the substantially pentagonal annular recess is open at an outer peripheral surface of the elastic stopper. The engaged portion of the elastic plug is composed of a substantially inverted truncated cone-shaped recess,
  The stopper for an infusion container according to any one of claims 11 to 13, wherein a lower end of the substantially inverted truncated conical recess is opened at a bottom surface of the elastic stopper.

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