JPH0621481Y2 - Infusion solution spout - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a stopper of an infusion container. More specifically, a plug of an infusion container capable of taking a large area of a piercing part for piercing a liquid guide needle (a needle pierced by a plug of the infusion container for drawing out an infusion from the infusion container) Regarding

<Problems to be Solved by Conventional Techniques and Inventions> As a stopper for sealing the mouth of a synthetic resin infusion container, conventionally, in order to prevent deterioration of the chemical liquid, the surface of the stopper body in contact with the liquid is made of fluororesin or polyethylene. It is known that it is made of a thin film such as polypropylene, or that a rubber stopper is provided with feet. However, these conventional plugs have the drawbacks that the former requires time and effort for manufacturing and is expensive, and the latter has legs because the area of the puncture portion is reduced accordingly.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a mouth plug for an infusion container, which is simple and inexpensive to manufacture, has no fear of liquid leakage, and has a large puncture area. And

<Means for Solving the Problems> In order to solve the above problems, the present invention provides an upper frame having a short tubular cover, a disk-shaped rubber stopper housed in the upper frame, and a short tubular container having a bottom. A stopper comprising a lower frame, the upper frame having a concentric circular through hole on the top surface thereof, and a first annular shape engaging the side wall of the lower frame at the lower end of the side wall thereof. A second annular projection is provided on the inner wall of the top surface, which is adjacent to the through hole and has an inclined surface that is inclined toward the through hole and reaches the inner wall of the top surface. The lower frame has a concentric circular through hole at its bottom, has an inner diameter approximately the same as the outer diameter of the upper frame, and engages the lower wall of the side wall with the side wall of the upper frame. An undercut is provided, and on the inner wall of the bottom part, so as to face the second annular protrusion of the upper frame,
Adjacent to the through hole, there is provided a third annular projection having an inclined surface that is inclined toward the through hole and reaches the inner wall of the bottom portion, and the rubber plug is provided on both sides of the upper surface of the upper frame. Annular grooves corresponding to the second and third annular protrusions on the surface and the bottom of the lower frame are formed, and after accommodating the rubber stopper in the upper frame, the upper frame accommodating the rubber stopper is covered on the lower frame. The upper and lower frames are engaged with each other, and a rubber stopper is sandwiched between the upper and lower frames to employ a synthetic resin infusion container spout.

<Operation> According to the above configuration, when the upper frame in which the rubber plug is fitted is inserted into the lower frame, the first annular protrusion of the upper frame and the adder cut of the lower frame are securely engaged, and the upper frame It prevents it from falling from the lower frame.

Further, since the stress of the rubber stopper pressed by the second annular protrusion of the upper frame and the third annular protrusion of the lower frame is directed to the central portion of the rubber stopper, the sealing property of the rubber stopper is improved, and the liquid from the piercing portion is improved. Leakage is completely prevented.

Furthermore, the rubber plug is compressed and sandwiched by the upper frame and the lower frame, and the third annular projection of the lower frame increases the contact area between the rubber plug and the lower frame, so that the rubber plug and the lower frame are connected. The sealing property is also improved, and liquid leakage from the boundary between the rubber stopper and the lower frame can be almost completely prevented.

<Example> Next, the example of the present invention is described based on a drawing.

FIG. 1 is a partial sectional front view for explaining an embodiment of the present invention, and FIGS. 2 to 4 show the upper frame, lower frame and rubber stopper of FIG. 1 cut along the central axis. FIG.

As shown in FIGS. 1 to 4, the plug of the infusion container of the present invention is
A stopper including an upper frame (1), a rubber plug (2) and a lower frame (3), and a first annular protrusion (4) of the upper frame (1) and an undercut (5) of the lower frame (3). ) Are fitted to each other, and the annular grooves (8) and (9) of the rubber plug (2) sandwiched between the upper frame (1) and the lower frame (3) are respectively fitted to the upper frame (1). The second annular projection (6) and the third annular projection (7) of the lower frame (3)
Is fitted.

Hereinafter, each part will be described in detail.

The upper frame (1) is a short tubular component that houses the rubber stopper (2) and holds the rubber stopper (2) between the lower frame (3) and the second frame.
As shown in the figure, it has a concentric circular through hole (10) on its top surface. The lower end of the side wall is formed with a first annular projection (4) that fits with the undercut (5) of the lower frame (3), and the inner wall of the top surface, that is, the lower frame (3) is a surface. Adjacent to the through hole (10), the through hole (10)
A second annular projection (6) having an inclined surface (11) that inclines to the side and reaches the inner wall of the top surface is provided. Through hole (10)
Is a piercing part for piercing a liquid guiding needle (not shown), and is usually formed in the same size as a through hole (12) of a lower frame (3) described later. Further, the second annular projection (6) is simply fixed between the upper frame (1) and the lower frame (3) so that the rubber stopper (2) does not come off when the liquid conducting needle is pierced. Without
Since the inclined surface (11) faces the central direction of the rubber stopper (2), the rubber stopper (2) is pressed toward the central direction, and the annular groove (7) of the rubber stopper (2), The rubber stopper (2) in cooperation with (8) and the third annular protrusion (7) of the lower frame (3).
Rubber plug (2) when the liquid-conducting needle pierced through the rubber plug (2) is removed by compressing
Prevents liquid leakage by improving the sealability of. The first
If the annular projection (4) is formed such that the top surface side projects in a stepped shape and the diameter is reduced toward the lower frame (3) side, an upward stress is exerted by the pressed rubber plug (2) and the upper frame is Since the (1) and the lower frame (3) are less likely to come off, the lower frame (3) preferably holds the rubber stopper (2) between the upper frame (1) and the upper frame (1) when the upper frame (1) is inserted. As shown in FIG. 3, there are concentric circular through holes (1
2), and a tubular member (14) having the through hole (12) as an opening is connected to the bottom. The inner diameter of the lower frame (3) is approximately the same as the outer diameter of the upper frame (1), and the lower end of the side wall of the lower frame (3) has a first annular protrusion (4) on the side wall of the upper frame (1). An engaging undercut (5) is formed. Further, the inner wall of the bottom portion is adjacent to the through hole (12) so as to face the second annular protrusion (6) of the upper frame (1) and is inclined toward the through hole (12) side to reach the inner wall of the bottom portion. Inclined surface (1
A third annular projection (7) having 3) is formed.
The third annular protrusion (7) has a rubber plug (2) on the upper frame (1).
And the lower frame (3) are firmly fixed, but since the inclined surface (13) faces the center of the rubber plug (2),
As already explained in the upper frame (1), it cooperates with the second annular protrusion (6) of the upper frame (1) and the annular grooves (8) and (9) of the rubber stopper (2). The rubber stopper (2) to enhance the sealing performance. The tubular member (14) opening to the through hole (12) may be formed integrally or separately, or even at the mouth of the infusion container (in this case,
The lower frame (3) may be integrally formed), or may be welded, screwed, or crowned to the mouth of the infusion container.

The rubber stopper (2) is a component which is clamped and fixed between the upper frame (1) and the lower frame (3), and both sides thereof are, as shown in FIG. Second and third annular protrusions (6) formed on the surface and the bottom of the lower frame (3),
Annular grooves (8) and (9) corresponding to (7) are formed. The annular grooves (8) and (9) differ from the shapes of the second and third annular protrusions (6) and (7) in that the rubber stopper (2) is provided on the upper frame (1) and the lower frame (3). Rubber stopper (2) when sandwiched between
Is formed in such a shape that a large stress is exerted in the direction of the center of the groove, and the groove has a width narrower than the width of the annular projections (6) and (7), for example, a U-shape or a square-shape. As a material for forming the rubber plug (2), a rubber-like elastic body such as synthetic rubber such as butyl rubber, ethylene-propylene rubber, nitrile rubber, and silicone rubber is generally used.

The material for forming the upper frame (1) and the lower frame (3) is not particularly limited, but polyethylene, polypropylene, polyester, polyvinyl chloride, etc. are generally used.

<Effects of the Invention> As is clear from what has been described above, by adopting the mouth plug of the infusion container of the present invention, it is possible to provide an infusion container that is inexpensive and does not leak from the mouth. .
Also, since the puncture part of the liquid guiding needle can be taken large,
It is possible to provide an infusion container in which it is easy to puncture a liquid guiding needle.

[Brief description of drawings]

FIG. 1 is a partial sectional front view for explaining an embodiment of the present invention, and FIGS. 2 to 4 show the upper frame, lower frame and rubber stopper of FIG. 1 cut along the central axis. FIG. <Explanation of main symbols> 1: Upper frame, 2: Rubber plug 3: Lower frame, 4: First annular protrusion 5: Undercut, 6: Second annular protrusion 7: Third annular protrusion, 8, 9: Annular groove 10, 12: Through hole

Claims (1)

[Scope of utility model registration request] 1. A plug comprising a capped short tubular upper frame, a disk-shaped rubber plug housed in the upper frame, and a bottomed short tubular lower frame, wherein the upper frame comprises: It has a concentric circular through hole on its top surface,
A first annular protrusion that engages with the side wall of the lower frame is provided at the lower end of the side wall, and the inner wall of the top surface is adjacent to the through hole and is inclined toward the through hole on the inner wall of the top surface. A second annular protrusion having an inclined surface extending to the upper frame, the lower frame having a concentric circular through hole at its bottom, and having an inner diameter substantially the same as the outer diameter of the upper frame. An undercut that engages with the side wall of the upper frame is provided at the lower end of the side wall, and the inner wall of the bottom is adjacent to the through hole so as to face the second annular protrusion of the upper frame. Then, a third annular protrusion having an inclined surface that slopes to the through hole side and reaches the inner wall of the bottom is provided, and the rubber plug is provided on both surfaces thereof with the top surface of the upper frame and the lower frame, respectively. An annular groove corresponding to the second and third annular protrusions on the bottom is formed, and after the rubber stopper is housed in the upper frame, Engaging the upper frame and the lower frame the contained upper frame of the beam stopper was put on the lower frame, formed by sandwiching the rubber plug between the upper frame and the lower frame plastic infusion container spout.