JP2001276179A - Rubber plug for vial - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber plug for vial, the shell par of which is varied in shape to eliminate a stepped part at a connection between the plug and a seal ring so as to prevent foreign matter from adhering thereto. SOLUTION: In the rubber plug for vial, a flanged top plate part 1 and a shell part 2 and leg parts 3 below the top plate part 1 are formed integrally with each other, and the seal ring 4 made of a ring-shaped projection is provided on the outer peripheral surface of the shell part. The outer periphery of the shell part above the seal ring 4 is formed of an inclined outer peripheral surface joined with the curved surface of the top plate part of the seal ring 4 and the seal ring 4 is connected with the shell part 2 by a smooth curved surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a rubber stopper for a vial used for storing a vial preparation such as a medicine.

[0002]

2. Description of the Related Art A stopper for a vial used for storing a vial preparation such as a pharmaceutical product has high airtightness and sealability, and a low tapping pressure when attaching the stopper.
It is required to prevent floating during tapping. In order to satisfy these requirements, as disclosed in Japanese Utility Model Laid-Open No. 1-11236, a trunk and legs are integrally formed below the top plate, and a ring-shaped outer surface is formed on the trunk outer surface. A rubber stopper for a vial provided with a seal ring composed of a ridge is used.

[0003] The rubber stopper for a vial bottle does not like the adhesion of foreign substances. Therefore, before use, a rubber stopper manufacturer and a pharmaceutical manufacturer perform a cleaning treatment in pure water to prevent the adhesion of foreign substances.

[0004] The body of a conventional rubber stopper has a cylindrical shape, and a seal ring having a semicircular cross section is formed on the outer peripheral surface thereof. Therefore, a step is formed at the joint between the outer peripheral surface of the trunk portion and the seal ring.

[0005]

As described above, the conventional rubber plug has a step formed at the joint between the outer peripheral surface of the body and the seal ring, so that foreign matter easily adheres to the rubber plug and even if it is washed. There was a drawback that it was hard to fall.

An object of the present invention is to eliminate such a drawback by changing the shape of the body of the rubber stopper, eliminating the joining step with the seal ring, and preventing the attachment of foreign matter.

[0007]

In order to achieve the above object, a rubber stopper for a vial according to the present invention comprises a top plate having a flange, and a body and legs integrally formed below the top plate. In the rubber stopper for a vial provided with a seal ring formed of a ring-shaped ridge on the outer peripheral surface of the body, an inclined outer periphery in which the outer periphery of the body above the seal ring is connected to the top plate side curved surface of the seal ring. The seal ring and the body are connected by a smooth curved surface.

[0008] The inclined outer peripheral surface connecting the outer periphery of the trunk to the top plate side curved surface of the seal ring is constituted by a truncated conical outer peripheral surface or an outer peripheral surface of a curved surface flared in a trumpet shape. Are connected by a smooth curved surface.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A top plate having a flange, a trunk and a leg are integrally formed below the top plate, and a seal ring comprising a ring-shaped ridge is provided on the outer peripheral surface of the trunk. In the rubber stopper for a vial, the outer periphery of the body above the seal ring is formed by a sloped outer peripheral surface connected to the curved surface on the top plate side of the seal ring, so that the outer periphery of the body is formed at the joint between the outer peripheral surface of the body and the seal ring. The stepped portion can be eliminated.

[0010] As described above, since the step formed at the junction between the outer peripheral surface of the trunk portion and the seal ring is eliminated, it is possible to prevent foreign matter from adhering to the junction between the outer peripheral surface of the trunk portion and the seal ring. In addition, even if there is any attached matter, it can be easily removed by a washing process.

[0011]

An embodiment of the present invention will be described with reference to the drawings. Figure 1 shows the underside of the top plate 1 with a flange at the outer periphery,
This is a rubber stopper for a vial in which a body 2 having an outer diameter slightly smaller than the inner diameter of the vial and a pair of left and right legs 3 are integrally provided. A seal ring 4 whose outer diameter is slightly larger than the inner diameter of the vial is formed at the lower part of the body 2, and the outer peripheral surface inclined between the curved surface on the top plate side of the seal ring 4 and the lower surface of the top plate 1 is formed. Connect with.

[0012] The inclined outer peripheral surfaces are connected by a truncated conical outer peripheral surface, and a connecting portion between the seal ring and the body is formed into a smooth curved surface to eliminate a step portion.

In addition, instead of the truncated conical shape, the outer peripheral surface is formed of a curved surface flared in a trumpet shape, and the seal ring and the body are connected by a smooth curved surface, so that the step can be eliminated.

[0014] The figure shows a state in which the rubber stopper is attached to a vial.
See Figure 2.

[0015]

According to the present invention, since the step formed at the junction between the outer peripheral surface of the rubber plug and the seal ring is eliminated, foreign matter adheres to the joint between the outer peripheral surface of the trunk and the seal ring. Can be prevented. In addition, even if there is any attached matter, it can be easily removed by a washing process.

[Brief description of the drawings]

FIG. 1 is a rubber stopper for a vial bottle according to an embodiment of the present invention.
Is a front view of the entire right half, which is longitudinally shown, and B is a plan view.

FIG. 2 is a front view showing the entirety of the vial that has been plugged with the rubber stopper shown in FIG.

[Explanation of symbols]

 1 Top plate 2 Body 3 Leg 4 Seal ring

Claims (1)

[Claims] 1. A vial having a top plate portion having a flange, a body portion and a leg portion integrally formed below the top plate portion, and a seal ring comprising a ring-shaped ridge provided on an outer peripheral surface of the body portion. In the rubber stopper for a bottle, the outer periphery of the trunk above the seal ring is formed by a sloped outer peripheral surface connected to the top plate side curved surface of the seal ring, and the seal ring and the trunk are connected by a smooth curved surface. Rubber stoppers for vials.