JPH0542834Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement in the opening of an infusion bag used for dripping, etc.

[Problems that conventional technologies and ideas try to solve]

In the infusion bag, a hollow cylindrical body (port part) that serves as the infusion outlet is inserted into the opening to plug the opening for the infusion solution, and the opening and the cylindrical body are heat-sealed or high-frequency sealed. There are some that have a cylindrical body fused together with a stopper for inserting a needle, etc., into the hollow part of the cylindrical body.

This type of bag is, for example, as shown in FIG. 3a, in which a cylindrical hollow body 11 having a plug insertion port 13 is fused to the opening of a thermoplastic sheet 10, and as shown in FIG. 3b. , the seam 12 of the plastic sheet 10 is prone to seal failure. That is, a gap 20 is created at the seam 12. If a gap 20 is formed, the infusion in the bag may leak out, or foreign matter such as bacteria may enter the infusion through the gap 20, resulting in contamination, which is extremely undesirable.

To solve this problem, a protrusion 15 is provided on the cylindrical body 11 to fill the gap 20 as shown in FIG. 4, or the sealing area between the cylindrical body 11 and the plastic sheet 10 is increased as shown in FIG. Although some cylinders 11 have an elliptical shape, in either case, the sealing conditions become worse, resulting in poor sealing and a gap at the seam 12.
Therefore, these can hardly be called good measures.

Further, as shown in FIG. 6, in the case where convex portions 17 are provided on the upper and lower sides of the outer circumference of the cylinder 11, the sealing area increases and the welding effect is slightly improved, but
Also, it is difficult to completely seal the cylinder 11 and the plastic sheet 10.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an opening for an infusion bag with improved sealing integrity between the hollow cylinder and the opening of the bag.

[Means to solve the problem]

In order to achieve the above object, the opening of the infusion bag of the present invention is provided with convex portions on the upper and lower sides of the outer periphery of the hollow cylindrical body, and an uneven surface is provided on the outer periphery of the hollow cylindrical body between the upper and lower convex portions. The feature is that the upper and lower convex portions and the uneven surface are fused to the opening.

〔Example〕

Hereinafter, the opening of the infusion bag of the present invention will be explained based on examples.

FIG. 1 shows an infusion bag 30 with an opening according to the present invention.

In FIG. 2 showing details of the hollow cylindrical body 1, convex portions 2 are provided on the upper and lower sides of the outer circumference of the cylindrical tube 1, and an embossed uneven surface 3 is provided on the outer circumference of the tube body 1 between the upper and lower convex portions 2. is formed. The upper and lower convex portions 2 and the embossed uneven surface 3 are fused to the opening of the plastic sheet 5 constituting the bag 30 by heat sealing or the like. As a result, the sealing area between the plastic sheet 5 at the opening and the cylindrical body 1 becomes substantially larger, and the plastic sheet 5 and the embossed uneven surface 3 melt and bite into each other during sealing. 5 can be completely tightly sealed, and sealing defects such as gaps do not occur.

[Effect of idea]

As explained above, the opening of the infusion bag of the present invention is formed by providing a convex portion on the upper and lower sides of the outer periphery of the hollow cylindrical body, and further forming an uneven surface on the outer periphery between the two convex portions. By fusing the uneven surface to the opening, the sealing area becomes substantially large, and the opening and the uneven surface bite into each other, making it possible to completely seal the cylinder body and the opening.

[Brief explanation of the drawing]

Fig. 1 is a front view of an infusion bag equipped with the opening of the present invention, Fig. 2 is an enlarged view of the opening of the bag shown in Fig. 1, and Fig. 3 a and b show the conventional opening. , a is its cross-sectional view, and b is the dotted line portion A shown in a.
4 is a cross-sectional view showing another example of the conventional opening, FIG. 5 is a cross-sectional view showing another example of the conventional opening, and FIG. 6 is a cross-sectional view showing another example of the conventional opening. FIG. DESCRIPTION OF SYMBOLS 1...Hollow cylindrical body, 2...Convex part, 3...Embossed uneven surface, 5...Plastic sheet, 30...
Infusion bag.

Claims (1)

[Scope of utility model registration request] In order to plug the opening of an infusion bag, a hollow cylindrical body serving as a plug insertion port is attached to the opening, and convex portions are provided at the top and bottom of the outer periphery of the hollow cylindrical body, and a hollow space between the top and bottom convex portions is provided. An opening for an infusion bag, characterized in that an uneven surface is formed on the outer periphery of a cylindrical body, and the upper and lower convex parts and the uneven surface are fused to the opening.