JPH0872918A - Set of liquid container spout and cap - Google Patents

Abstract

(57) [Abstract] [Purpose] Vibrations during ultrasonic welding are less likely to be transmitted to the thin-walled part of the stopper body that integrally has a closing plate to prevent pinholes from being generated, and the closing plate can be easily removed. To simplify the opening operation. [Structure] A closure plate 5 is integrally provided inside an upper edge side of a spout tube 3 of a spout main body 2 via a thin portion 6 along the circumferential direction of the inner surface of the spout tube, and a top plate of a cap 8. Welding feet 9 hanging toward the closing plate 5 were integrally provided on the back surface, and the welding feet 9 and the closing plate 5 were connected by heat welding.

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 liquid container consisting of a paper container and a cap for covering the spout.

[0002]

2. Description of the Related Art Conventionally, in a spout portion of a liquid container made of a paper container, an inner plug is arranged inside a spout barrel of a spout body attached to the liquid container and a cap is attached to the spout barrel. There is a structure in which the cap is removed and the inner plug is pushed in after the cap is removed, and the film that closes the bottom opening of the spout cylinder (the spout body from the inner side of the container to the spout of the liquid container is In some cases, the film that closes the spout of the liquid container (when the spout body is attached to the spout from the outside of the container) is broken.

In the case of having such an inner plug, since the member constituting the spouting portion becomes four members of the film, the main body of the spout, the inner plug, and the cap, the material cost becomes high. Have been proposed. As one of them, the lower opening of the spout barrel of the spout body is covered with a film in advance, and the convex portion provided on the back surface of the top plate of the cap is fixed to the film so that when the cap is detached and rotated, the convex portion There is a configuration in which it is opened by being torn by the rotation of (Japanese Utility Model Laid-Open No. 64-17925 and Japanese Patent Application Laid-Open No. 1-240443). Further, instead of the film attached to the spout body of the spout body, a closure plate integrally formed with a thin portion inside the spout body and a cap for covering the spout body. Is also proposed. For example, the actual Kaihei 2-400
As disclosed in Japanese Patent No. 31 and Japanese Patent Application Laid-Open No. 6-99974, a pulling ring or a handle is provided on the closing plate and the closing plate is removed by pulling up the pulling ring, or Japanese Patent Laid-Open No. 6-92351. As disclosed in Japanese Patent Publication No. JP-A-2003-264, there is one in which a closing plate is pulled up to the cap when the cap is removed. In such a structure in which the closing plate is integrally formed via the thin portion, it has two members, the spout body and the cap, which is advantageous in terms of material cost.

[0004]

By the way, the fixing of the spigot body to the container side is performed by welding by ultrasonic vibration, and as disclosed in JP-A-62-242526, The cap body is set in the mounting opening of the container, and the ultrasonic horn of the ultrasonic welding machine is applied around the mounting opening corresponding to the flange of the cap body so that ultrasonic waves are transmitted and welding is performed. . However, in the spout body integrally having the closing plate through the thin portion, when the thin portion is located in the vicinity of the flange, ultrasonic vibration applied to the flange during welding is transmitted to the thin portion, There is a problem that pinholes are easily generated in the thin portion. on the other hand,
From the viewpoint of opening operability, an operation of pulling a pull ring or a handle is required to remove the closing plate from the spout body, and the opening operation is not easy. Incidentally, in the above-mentioned Japanese Patent Laid-Open No. 6-92351, there is shown a structure in which when the cap is removed, the wedge-shaped portion of the cap engages with the closing plate and pulls it up. The shape of the cap is extremely complicated and has a problem that the molding cost is significantly increased.

Therefore, the present invention has been made in consideration of the above problems, and it is difficult to transmit vibration during ultrasonic welding to a thin portion of a spout body integrally having a closing plate, and the closing plate can be easily removed. Therefore, it is an object of the present invention to prevent pinholes from occurring and to facilitate the opening operation.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a closing plate for closing the spout tube is provided inside the spout tube of the spout body. Is integrally provided via a thin portion along the circumferential direction of, and, on the back surface of the top plate of the cap screwed to the pouring tube, the welding foot hanging toward the closing plate is integrally provided, Provided is a set of a cap for a liquid container and a cap, wherein the welding foot and the closing plate are connected by heat welding, and further, the closing plate is concentric with the center of the spout cylinder. A welding foot support is provided to provide a set of a liquid container spout and a cap in which the welding foot is positioned corresponding to the welding foot support,
The above problems are solved.

[0007]

In the present invention, the thin-walled portion is located inside the upper edge side of the spout tube and is separated from the flange around the base portion of the spout body, so that vibration during ultrasonic welding is difficult to be transmitted. And since the welding foot of the cap is connected to the closing plate by heat welding, when the cap is rotated in the removing direction, the closing plate is rotated through the welding foot with the rotation and the thin portion is broken, It will be opened.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to an embodiment shown in FIGS. In the figure, reference numeral 1 denotes a spout for a liquid container, which is integrally provided with a flange 4 around a base end of a spout cylinder 3 in a spout body 2. A closing plate 5 is integrally provided inside the upper edge side of the dispensing cylinder 3 via a thin portion 6 along the circumferential direction of the inner surface of the dispensing cylinder, and the closing plate 5 closes the dispensing cylinder 3. are doing. As shown in the figure, the closing plate 5 is provided with a welding foot support 7 which is concentric with respect to the center of the spouting cylinder 3, and a welding portion having a single recess at the same position as the center of the spouting tube 3. There is a foot rest 7, around which is a welded foot rest 7'consisting of an annular groove. Reference numeral 8 is a cap that is screwed onto the spout cylinder 3 of the spout 1, and the cap 8 has a welding foot 9 hanging from the back surface of the top plate toward the closing plate 5.
Are provided integrally. The welding foot 9 located in the center of the back surface of the top plate is rod-shaped and is in contact with the welding foot receiver 7 in the center of the closing plate 5, and is welded in a cylindrical shape around the rod-shaped welding foot 9. There is a foot 9 ', and this cylindrical welding foot 9'corresponds to and contacts the annular welding foot support 7'. The lower ends of the welding feet 9 and 9'and the welding foot receivers 7 and 7'are connected by heat welding and integrated, and no pinhole is formed in the thin portion by this heat welding. The molding material of the cap 8 is a high-density polyethylene resin, and the molding material of the spout 1 is a low-density polyethylene resin.

In this way, the welding feet 9, 9'on the cap 8 side
Since the closing plate 5 of the mouth plug 1 is connected to the closing plate 5, the rotating force and the pulling force are transmitted to the closing plate 5 when the cap 8 is rotated in the removing direction, and the closing plate 5 is rotated. When pulled up, the thin portion 6 is broken and the pouring cylinder 3 is opened. As shown in the illustrated embodiment, if the thin portion 6 is formed between the outer peripheral edge 10 of the closing plate and the inner edge 11 of the spouting tube which are arranged in the height direction of the spout, ultrasonic vibration is generated. It becomes easier to resist vertical vibration (in the direction of the height of the spigot) in (3), and the occurrence of pinholes can be further suppressed.

[0010]

As described above, in the set of the liquid container spout and the cap of the present invention, the closing plate for closing the spout tube is provided inside the spout tube of the spout body at the upper edge side. Is integrally provided via a thin portion along the circumferential direction of the inner surface of the outlet cylinder, and
A welding foot hanging toward the closing plate is integrally provided on the back surface of the top plate of the cap screwed to the pouring tube, and the welding foot and the closing plate are connected by heat welding. It is characterized by. Since the thin portion is provided at a position away from the flange of the spout body in this way, it becomes difficult for ultrasonic vibration when the spigot is attached to the thin portion,
It is possible to prevent generation of pinholes in the thin portion. In addition, the thin portion around the closing plate can be broken by a simple operation of rotating the cap in the removing direction, and the opening operation becomes extremely simple.

[Brief description of drawings]

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

FIG. 2 is an explanatory view showing a state in which a spout and a cap are separated from each other in one embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Plug 2 ... Plug main body 3 ... Spouting cylinder 4 ... Flange 5 ... Closing plate 6 ... Thin part 7, 7 '... Welding foot support 8 ... Cap 9, 9' ... Welding foot

Claims (2)

[Claims] 1. A closure plate for closing the pouring tube is integrally provided inside the upper edge side of the pouring tube of the spout body via a thin portion along the circumferential direction of the inner surface of the pouring tube, and A welding foot hanging toward the closing plate is integrally provided on the back surface of the top plate of the cap screwed to the pouring tube, and the welding foot and the closing plate are connected by heat welding. A set of a liquid container spout and a cap. 2. The liquid container according to claim 1, wherein the closing plate is provided with a welding foot support that is concentric with the center of the pouring cylinder, and the welding foot is positioned corresponding to the welding foot support. Set of spout and cap.