JP4194694B2 - Plastic caps for pharmaceutical containers - Google Patents

Description

[0001]
【Technical field】
The present invention relates to a plastic cap attached to a pharmaceutical container having a sealing material such as a rubber stopper.
[0002]
[Prior art and its problems]
In pharmaceutical containers filled with pharmaceuticals, the cylindrical opening is closed with a sealing material that serves as a needle piercing surface, and a cap that holds the sealing material and the pharmaceutical container in close contact over a long period of time is provided on this sealing material. As a kind of such a cap, a type having a protrusion that can be cut and removed by pressing the center from the side is known. In a normal use mode, the drug container is held in one hand, the center protrusion is pressed and removed by pressing with the thumb, and the contents are sucked by inserting an injection needle into the exposed needle insertion surface of the sealing material.
[0003]
Such caps have traditionally consisted of metal or a composite of metal and plastic material. Among these, the metal cap is easy to obtain flexibility in cutting characteristics such as the shape and cutting load of the central protrusion, but there is a possibility that fine metal powder may be scattered on the needle piercing surface when cutting the central protrusion. . The cap base around the central protrusion is made of a plastic material, and the cap base is fixed to the pharmaceutical container opening with a metal material. Caps made of a composite of metal and plastic material are sorted by material when discarded. There is a problem that not only is it troublesome to do, but also the cutting ability of the central protrusion is poor.
[0004]
OBJECT OF THE INVENTION
Accordingly, an object of the present invention is to obtain a plastic cap for a pharmaceutical container that is entirely made of a plastic material and that can easily and reliably cut the central protrusion.
[0005]
SUMMARY OF THE INVENTION
The present invention relates to a cap made of plastic as a whole, which is attached and bonded onto a sealing material of a pharmaceutical container in which a sealing material is attached to the cylindrical opening, and the outer peripheral surface of the cylindrical opening of the pharmaceutical container And a cylindrical portion that contacts the outer peripheral surface of the sealing material; an annular disc portion that contacts the peripheral edge of the upper surface of the sealing material; and a central protrusion that stands upright inside the annular disc portion; The annular disc portion is formed with a taper portion that gradually reduces the thickness on the central projection side and forms an annular thin portion at the deepest portion, and the central projection portion stands inside the annular thin portion. And the thick cylindrical part is formed in the cyclic | annular thin part side base.
[0006]
In this way, the annular thin plate portion is formed by the taper portion in the annular disk portion, and the central protrusion is erected on the inner side of the annular thin portion, and the thick cylindrical portion is formed at the base portion thereof. The cutting property of the part can be improved. That is, the thick cylindrical portion at the base portion of the central projection portion increases the rigidity around the annular thin portion, and when the force in the direction of tilting is applied to the central projection portion, the central projection portion is easily cut. The height of the thick cylindrical portion of the central protrusion may be lower than the thickness of the annular disc portion.
[0007]
It is preferable to form a recess having a larger diameter than the diameter of the annular thin portion on the opposing surface of the annular disk portion and the sealing material of the central protrusion. A gap is formed between the lower surface of the central protrusion and the upper surface of the sealing material, and the cutting performance of the central protrusion is improved. The depth of the concave portion of the facing surface between the annular disc portion and the seal material of the central projection portion is set to 0.1 to 0.5 mm in consideration of the entire cap and the size of the central projection portion. It was confirmed that when the wall thickness was 0.01 to 1 mm, preferable cutting properties were obtained.
[0008]
In the plastic cap of the present invention, the central protrusion and the upper surface of the sealing material are formed on the opposed surfaces of the annular disk part and the sealing material of the central protruding part without forming a thick cylindrical part in the central protruding part. It is also possible to provide a recess that forms a gap therebetween.
That is, according to another aspect of the present invention, there is provided a cap made of plastic, which is adhered and bonded onto the sealing material of a pharmaceutical container in which a sealing material is adhered to a cylindrical opening, A cylindrical portion in contact with the outer peripheral surface of the cylindrical opening of the container and the outer peripheral surface of the sealing material; an annular disk portion in contact with the peripheral edge of the upper surface of the sealing material; a center upright inside the annular disk portion The annular disc portion is formed with a taper portion that gradually reduces the thickness on the center projection portion side and forms an annular thin portion at the deepest portion, and the annular disc portion, A concave surface that is larger in diameter than the annular thin portion and that forms a gap between the central protrusion and the upper surface of the sealing material is formed on the surface of the central protrusion that faces the seal material.
[0009]
The plastic material constituting the plastic cap of the present invention is, for example, polyamide, polyethylene terephthalate, polybutylene terephthalate, polypropylene, polymethylpentene, polycarbonate, polyphenylene sulfite, polyarylate, polysulfone, polyethersulfone, polyetheretherketone. One or more selected from the group consisting of polyetherimide, liquid crystal polymer, polyether ketone, polyallyl ether ketone, polyacetal, modified polypropylene ether, aromatic polyamide, and cyclic olefin resin can be used. In particular, polypropylene is preferable from the viewpoint of hardness and cost.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The pharmaceutical container 20 targeted by the plastic cap 10 of the present invention has a cylindrical opening 21, and a rubber plug (sealing material) 22 is attached to the cylindrical opening 21. On the outer peripheral surface of the cylindrical opening 21, a neck portion 24 is formed following the large diameter portion 23 at the end. The content liquid (for example, chemical liquid) in the pharmaceutical container 20 is sucked by inserting the injection needle of a syringe into the flat needle insertion surface 22 a of the rubber stopper 22.
[0011]
The plastic cap 10 keeps the cylindrical opening 21 and the rubber stopper 22 of the pharmaceutical container 20 in close contact with each other for a long period of time, and prevents the rubber stopper 22 and the pharmaceutical container 20 from changing the contents. It sometimes has a function of easily exposing the needle piercing surface 22a. The plastic cap 10 is entirely made of a plastic material. Examples of the plastic material include polyamide, polyethylene terephthalate, polybutylene terephthalate, polypropylene, polymethylpentene, polycarbonate, polyphenylene sulfite, polyarylate, polysulfone, and polyether. One or more selected from the group consisting of sulfone, polyether ether ketone, polyether imide, liquid crystal polymer, polyether ketone, polyallyl ether ketone, polyacetal, modified polypropylene ether, aromatic polyamide and cyclic olefin resin can be used. . In particular, it is preferable to use polypropylene from the viewpoint of hardness and cost. The plastic cap 10 includes a cylindrical portion 11 extending on the outer peripheral surface of the cylindrical opening 21 of the pharmaceutical container 20, an annular disc portion 12 extending from the upper end portion of the cylindrical portion 11 onto the rubber stopper 22, And a central protrusion 13 that stands upright inside the annular disk portion 12. At the lower end of the cylindrical portion 11, a retaining claw 11 a that engages with the neck portion 24 of the container 20 is formed.
[0012]
The annular disc portion 12 and the central projection portion 13 are formed as follows. The annular disc portion 12 is formed with a taper portion (taper surface) 14 that gradually reduces the thickness on the central projection portion 13 side, and an annular thin portion 15 is formed at the deepest portion of the taper portion 14. Yes. The width s of the annular thin portion 15 is preferably 0.1 mm or less.
[0013]
The hollow central projection 13 is erected on the inner side of the annular thin portion 15, and a thick cylindrical portion 16 thicker than the upper portion is formed at the base on the annular thin portion 15 side. The thick cylindrical portion 16 increases the rigidity around the annular thin portion 15 of the central projection portion 13 and acts to cause stress concentration in the annular thin portion 15 when a tilting force is applied to the central projection portion 13 from the lateral direction. To do.
[0014]
Further, a concave portion 17 having a diameter D larger than the diameter r of the annular thin portion 15 is formed on the opposing surface of the annular disc portion 12 and the rubber plug 22 of the central projection portion 13. The recess 17 forms a gap between the lower surface of the central protrusion 13 and the needle piercing surface 22a of the rubber plug 22, and when the initial protrusion force is applied to the central protrusion 13, the central protrusion 13 is likely to fall down. There is work to do. That is, if the lower surface of the central projection 13 and the needle piercing surface 22a of the rubber plug 22 are in close contact with each other, the rubber plug 22 becomes a resistance when a tilting force is applied to the central projection 13, but the concave portion If there is a gap due to 17, the rubber plug 22 does not become a resistance when an initial tilting force is applied to the central protrusion 13. For this reason, the center protrusion 13 can be cut with a small force. The depth d of the concave portion 17 is preferably set to 0.1 to 0.5 mm, and the thickness t of the annular thin portion 15 is 0.01 to 1 mm in anticipation of a decrease in thickness due to the concave portion 17. It is good to do. More desirably, the thickness is 0.05 to 0.5 mm.
[0015]
The plastic cap 10 described above is covered with a medicine container 20 filled with medicines and a rubber stopper 22 attached to a cylindrical opening 21 as shown in FIG. That is, when the tubular portion 11 is fitted into the large diameter portion 23 while elastically deforming the retaining claw 11a at the lower end thereof against the large diameter portion 23, the retaining claw 11a reaches the neck portion 24. The cylindrical portion 11 is elastically restored, and the claw 11 a is locked to the neck portion 24. At this time, the annular disk portion 12 is in close contact with the upper surface of the rubber stopper 22. Thus, the plastic cap 10 is prevented from coming off, and the rubber stopper 22 is fixed to the cylindrical opening 21. The rubber stopper 22 does not come into contact with air, and its alteration and alteration of the content liquid in the pharmaceutical container 20 are prevented.
[0016]
When used, the entire pharmaceutical container is held in one hand, and the center protrusion 13 is pushed from the side with, for example, a thumb. Then, the central protrusion 13 is cut from the annular thin portion 15 and the needle insertion surface 22a of the rubber plug 22 is exposed. A needle of a syringe is inserted through the exposed needle insertion surface 22a to suck the content liquid.
[0017]
The above-described cutting operation of the central projecting portion 13 is primarily because the thick cylindrical portion 16 is formed at the lower end portion of the central projecting portion 13 and its rigidity is enhanced. Since there is a gap due to the concave portion 17 between the lower surface of 13 and the needle piercing surface 22a of the rubber plug 22, it can be reliably performed with a small force. That is, since the thick cylindrical portion 16 exists just inside the annular thin portion 15 where the central projection portion 13 is cut, the tilting force applied to the central projection portion 13 is transmitted to the vicinity of the annular thin portion 15 to cause stress. It is possible to cut from the annular thin portion 15 by concentrating and eliminating the initial tilting resistance of the central protrusion 13 by the gap formed by the concave portion 17. Immediately after the start of cutting at the annular thin portion 15, the bottom portion of the central protrusion 13 comes into contact with the rubber plug 22, but the resistance after the start of cutting does not matter.
[0018]
【The invention's effect】
According to the present invention, it is possible to obtain a plastic cap that is entirely made of a plastic material and that can easily and reliably cut the central protrusion.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a plastic cap for a pharmaceutical container according to the present invention in a state of being attached to a pharmaceutical container having a rubber stopper.
FIG. 2 is an enlarged cross-sectional view of a single plastic cap of FIG.
3 is an enlarged cross-sectional view of a portion III in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Plastic cap 11 Cylindrical part 12 Annular disk part 13 Center protrusion part 14 Tapered part 15 Annular thin part 16 Thick cylindrical part 17 Recess 20 Pharmaceutical container 21 Cylindrical opening 22 Rubber stopper (sealing material)
22a Needle penetration surface 23 Large diameter portion 24 Neck portion

Claims (7)

A cap made of plastic as a whole, bonded and bonded onto the sealing material of a pharmaceutical container for depositing a sealing material on a cylindrical opening,
A cylindrical portion in contact with the outer peripheral surface of the cylindrical opening of the pharmaceutical container and the outer peripheral surface of the sealing material;
An annular disc portion in contact with the peripheral edge of the upper surface of the sealing material;
A central protrusion standing upright on the inside of the annular disk portion;
The annular disc portion is formed with a taper portion that gradually reduces the thickness on the center projection portion side and forms an annular thin portion at the deepest portion,
The center projection portion stands on the inner side of the annular thin portion, and a plastic cap for a pharmaceutical container in which a thick cylindrical portion is formed on the base portion on the annular thin portion side. The cap according to claim 1, wherein a concave portion having a diameter larger than the diameter of the annular thin portion is formed on a surface of the annular disc portion and the central projection portion facing each other. Plastic cap for pharmaceutical containers with a gap between them. The cap according to claim 2, wherein the depth of the concave portion of the facing surface between the annular disk portion and the sealing material of the central protrusion is 0.1 to 0.5 mm. The cap according to any one of claims 1 to 3, wherein the thickness of the annular cut thin portion is 0.01 to 1 mm. The cap according to any one of claims 1 to 3, wherein the thickness of the thick cylindrical portion of the central protrusion is lower than the thickness of the annular disc portion. A cap made of plastic as a whole, bonded and bonded onto the sealing material of a pharmaceutical container for depositing a sealing material on a cylindrical opening,
A cylindrical portion in contact with the outer peripheral surface of the cylindrical opening of the pharmaceutical container and the outer peripheral surface of the sealing material;
An annular disc portion in contact with the peripheral edge of the upper surface of the sealing material;
A central protrusion standing upright on the inside of the annular disk portion;
The annular disc portion is formed with a taper portion that gradually reduces the thickness on the center projection portion side and forms an annular thin portion at the deepest portion,
A concavity that is larger than the diameter of the annular thin portion and that forms a gap between the central protrusion and the upper surface of the seal material is formed on the opposing surface of the annular disk portion and the seal material of the center protrusion. A plastic cap for pharmaceutical containers. The cap according to any one of claims 1 to 6, wherein the plastic material is polyamide, polyethylene terephthalate, polybutylene terephthalate, polypropylene, polymethylpentene, polycarbonate, polyphenylene sulfite, polyarylate, polysulfone, polyethersulfone, Plastic cap for pharmaceutical containers comprising at least one selected from the group consisting of polyetheretherketone, polyetherimide, liquid crystal polymer, polyetherketone, polyallyletherketone, polyacetal, modified polypropylene ether, aromatic polyamide and cyclic olefin resin .

Images