JP3275566B2 - Set of spout and cap for liquid container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a set of a plug for a liquid container comprising a paper container and a cap for covering the same.

[0002]

2. Description of the Related Art Conventionally, at a spout of a liquid container made of a paper container, an inner plug is arranged inside a spout cylinder of a plug body attached to the liquid container, and a cap is attached to the spout cylinder. After the cap is removed, the inner plug is pushed in, and the film that closes the bottom opening of the dispensing cylinder (the plug main body is inserted from the container inner side to the liquid container outlet) In some cases, the film closing the spout of the liquid container (when the plug body is attached to the spout from the outside of the container) is broken.

[0003] When such a plug is provided, a pinhole is formed near the center of the film (which closes the bottom opening of the dispensing cylinder) due to the ultrasonic vibration when the plug body is welded to the container. There is a problem that this occurs, and the members constituting the spout portion become four members of the film, the plug body, the inner plug, and the cap, so that the material cost is increased, and the inner plug is pushed in at the time of opening. Because of the great power required, the following have been proposed in recent years. That is, the lower opening of the spout cylinder of the plug body is previously covered with a film, or the mounting hole of the container body is previously covered with a film, and the entire lower end of the cylindrical mounting wall which is hung down from the back surface of the top plate of the cap. Is welded to the film, and when the cap is removed and rotated, the film is torn off by the rotation of the mounting wall, and the film is opened (Japanese Patent Laid-Open No. 1-240443, Japanese Unexamined Utility Model Publication No. 2-4003).
No. 1, JP-A-3-84728).

[0004]

However, in the case where the lower end of the annular mounting wall is welded to the film, the rotational force of the cap corresponds to the rotational force of the cap when the cap is initially removed and rotated, that is, when the cap is opened. Therefore, the film is not evenly received by the cap, and if the cap is not rotated by applying a large amount of rotational force, the film is not broken and the opening operation cannot be easily performed.

In view of the above, the present invention has been made in consideration of the above-described problems. In a structure in which a film is broken and opened by rotation of a cap, a pinhole of the film is not generated, and rotation of the cap is prevented. An object of the present invention is to transmit a force locally to a film to make it easy to break the film, and to easily perform an opening operation.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a lower surface of a top plate of a cap which covers a lower opening of a spout cylinder of a plug body with a film and is screwed to the spout cylinder. From the bottom toward the film, provided at the lower end of the hem a plurality of mounting seats spaced along the inner circumference of the lower opening of the pouring cylinder, the hem via the mounting seat Providing a set of a cap and a cap for a liquid container, characterized in that the portion and the film are welded, furthermore, the mounting seat,
An object of the present invention is to provide a set of a cap for a liquid container and a cap having an extended portion having a predetermined length in a direction along an inner periphery of a lower opening of a dispensing cylinder to solve the above problem.

[0007]

In the present invention, the mounting seat at the lower end of the skirt is
Since it is arranged at intervals along the inner circumference of the lower opening of the dispensing cylinder, when the cap is rotated in the removing direction, a local force is applied to the film and the film is easily broken. Become.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on one embodiment shown in FIGS. 1 in the figure is a cap,
As shown in FIG. 2, the cap 1 is screwed into a spout cylinder 3 of a plug body 2 attached to a mounting hole b of a container body a from the inside of the container. A hem portion 6 is provided integrally from the back surface of the plate 4 and hangs down toward a film (a resin laminated film having an aluminum layer) 5 covering the lower opening of the pouring cylinder 3 (FIG. 3).

The skirt portion 6 has a cross-sectional shape as shown in FIG. 1 and has a width substantially corresponding to the inner diameter of the pouring tube 3 and It can be rotated inside. A mounting seat 7 is provided at a lower end of the hem portion 6 at a position closer to the inner peripheral side of the pouring tube 3.
Each of the mounting seats 7 has an extending portion 8 extending in the direction along the inner periphery of the lower opening of the pouring cylinder 3 and in the rotation direction in which the cap 1 is removed. The mounting seats 7 are arranged at intervals in the inner circumferential direction of the lower opening of the pouring tube 3 and are welded to the film 5 in this arrangement state (FIG. 2). In this manner, since the mounting seats 7 are arranged at intervals and are welded to the film 5,
Since the lower end of the hem portion 6 is partially connected to the film 5 at a position along the inner peripheral direction of the lower opening of the pouring tube 3, when the cap 1 is rotated in the initial removing direction,
The rotational force is locally transmitted to the film 5, and therefore, a force is locally applied to the film 5, so that the film 5 is easily broken, and as shown in FIG. It is opened.

In the above embodiment, the skirt portion has a cross shape directed in four directions. However, the present invention is not limited to this, and a sectional shape directed in three directions, a shape directed in six directions, or the like can be adopted. Further, the skirt portion may be formed in a cylindrical shape, and the mounting seat may be provided at an interval in the circumferential direction of the lower end.

[0011]

As described above, the set of the spout and the cap for a liquid container of the present invention covers the lower opening of the spout cylinder of the spout body with the film, and the top of the cap screwed to the spout cylinder. A hem portion is hung from the back surface of the board toward the film, and a plurality of mounting seats are provided at the lower end of the hem portion along the inner periphery of the lower opening of the pouring cylinder, and a plurality of mounting seats are provided through the mounting seat. The skirt and the film are welded. By this, when the cap is rotated in the initial removal direction, a rotational force is locally applied to the film, so that the film is easily broken, and thus, without requiring a large force, by rotating the cap, Easy to open. In addition, the hem absorbs the vibration of the ultrasonic wave when the plug body is welded to the container, so that it is possible to prevent the occurrence of pinholes in the film, and the effect of excellent practicality is obtained. To play.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a cap in an embodiment of a set of a liquid container stopper and a cap according to the present invention.

FIG. 2 is an explanatory view showing a mounting state of a plug and a cap in a cross section in one embodiment.

FIG. 3 is an explanatory view showing a cross section of a cap according to one embodiment.

FIG. 4 is an explanatory view showing an opened film.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cap 2 ... Plug body 3 ... Outlet cylinder 5 ... Film 6 ... Hem part 7 ... Mounting seat 8 ... Extension part

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 47/36 B65D 51/20 B65D 5/74 WPI / L (QUESTEL)

Claims (2)

(57) [Claims] 1. A lower opening of a spout cylinder of a spout body is covered with a film, and a hem is hung downwardly from the back surface of a top plate of a cap screwed to the spout cylinder toward the film. A plurality of mounting seats spaced along the inner periphery of the lower opening of the dispensing cylinder, and the hem portion and the film are welded through the mounting seats. Set of stopper and cap. 2. The set according to claim 1, wherein the mounting seat has an extending portion having a predetermined length in a direction along an inner periphery of a lower opening of the pouring cylinder. .