JP3303554B2 - 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] In the case of having such an inner plug, since the material constituting the spouting portion becomes four members of a film, a plug body, an inner plug, and a cap, the material cost is increased. Stuff has been proposed. As one of them, the lower opening of the spout cylinder of the plug body is covered in advance with a film, and a convex portion provided on the back surface of the top plate of the cap is fixed to the film. (See Japanese Utility Model Laid-Open No. 64-17925 and Japanese Patent Laid-Open No. 1-240443). Further, instead of the film attached to the spout cylinder of the spout body, two members of a spout body having a closure plate integrally formed through a thin portion inside the spout cylinder and a cap covering the same. The one composed of is also proposed. For example, Japanese Utility Model 2-400
As disclosed in Japanese Patent Application Laid-Open No. 31699/1994 and Japanese Patent Application Laid-Open No. Hei 6-99974, a pull ring or a handle is provided on the closing plate, and the closing plate is removed by pulling up the pull ring. As disclosed in Japanese Patent Application Laid-Open Publication No. H10-264, there is an apparatus in which a closing plate is pulled up to a cap when the cap is removed. Thus, in the configuration in which the closing plate is integrally provided with the thin portion interposed therebetween, there are two members of the plug body and the cap, which is advantageous from the viewpoint of material cost.

[0004]

The fixing of the plug body to the container side is performed by ultrasonic vibration welding, as disclosed in Japanese Patent Application Laid-Open No. 62-242526. The plug 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 plug body to transmit ultrasonic waves so that welding is performed. . However, in the plug body having a closing plate integrally through the thin portion, when the thin portion is located near the flange, ultrasonic vibration applied to the flange at the time of welding is transmitted to the thin portion. There is a problem that a pinhole is easily generated in a thin portion. on the other hand,
From the viewpoint of opening operability, an operation of lifting a pull ring or a handle is necessary to remove the closing plate from the plug body, and the opening operation has not been easy. Note that, in the above-mentioned Japanese Patent Application Laid-Open No. 6-92351, a structure is shown in which the wedge-shaped portion of the cap is locked to the closing plate and the cap is lifted when the cap is removed. The shape of the cap is extremely complicated, which has the problem of significantly increasing the molding cost.

Accordingly, the present invention has been made in view of the above-mentioned problems, and makes it difficult for vibration during ultrasonic welding to be transmitted to a thin portion of a plug body integrally having a closure plate, and the closure plate can be easily removed. It is therefore an object of the present invention to prevent pinholes and to make opening operations easier.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and a closing plate for closing a spout cylinder is provided inside an upper edge side of the spout cylinder of the plug body. Provided integrally via a thin portion along the circumferential direction of the cap, and, on the back surface of the top plate of the cap screwed to the pouring cylinder, a welding foot hanging down toward the closing plate is integrally provided , Note on closure plate
The welding foot rest, which is concentric with the center of the barrel,
Wherein the welding foot is positioned corresponding to the welding foot receiver.
The welding foot and the welding foot receiver are connected by heat welding.
And a cap and a cap for a liquid container,
Providing a set, it is to solve the above problems.

[0007]

According to the present invention, the thin portion is located inside the upper edge side of the dispensing cylinder and is separated from the flange around the base of the plug body, so that the vibration during ultrasonic welding becomes 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 rotates through the welding foot with the rotation and the thin part is broken, It will be opened.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on one embodiment shown in FIGS. In the figure, reference numeral 1 denotes a plug for a liquid container, which has a flange 4 integrally around the base end of the pouring tube 3 in the plug body 2. A closing plate 5 is provided integrally with the inside of the upper edge side of the pouring cylinder 3 through a thin portion 6 along the circumferential direction of the inner surface of the pouring cylinder, and the closing plate 5 closes the pouring cylinder 3. are doing. The closing plate 5 is provided with a welding foot support 7 which is concentric with the center of the pouring cylinder 3 as shown in the figure. There is a footrest 7 around which there is a welded footrest 7 'consisting of one annular groove. Reference numeral 8 denotes a cap that is screwed to the spouting tube 3 of the spout 1. The cap 8 has a welding foot 9 that hangs down from the back of the top plate toward the closing plate 5.
Are provided integrally. The welding foot 9 located at the center of the back surface of the top plate is formed in a rod shape and is in contact with the welding foot receiver 7 at 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' is in contact with the annular welding foot receiver 7 '. The lower ends of the welding feet 9 and 9 'and the welding foot receivers 7 and 7' are connected and integrated by heat welding, and pinholes do not occur in thin portions in this heat welding. The material for forming the cap 8 is a high-density polyethylene resin, and the material for the plug 1 is a low-density polyethylene resin.

Thus, the welding feet 9, 9 'on the cap 8 side
And the closure plate 5 of the faucet 1 are connected, so that when the cap 8 is rotated in the removing direction, a rotational force and a lifting force are transmitted to the closure plate 5, and the closure plate 5 rotates while rotating. When pulled up, the thin portion 6 is broken and the dispensing 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 overhanging in the height direction of the plug, ultrasonic vibration can be obtained. In the vertical direction (in the height direction of the plug), and the occurrence of pinholes can be further suppressed.

[0010]

As described above, in the set of the cap for a liquid container and the cap according to the present invention, the closing plate for closing the spout cylinder is provided inside the upper edge side of the spout cylinder of the spout body. Provided integrally via a thin portion along the circumferential direction of the inner surface of the output cylinder, and
A welding foot hanging down toward the closing plate is integrally provided on the back surface of the top plate of the cap screwed to the dispensing cylinder,
Welded concentrically with the center of the pouring cylinder
A foot support is provided, and the welding foot corresponds to the welding foot support
And wherein the welding foot and the welding foot receiver are connected by heat welding. Since the thin portion is provided at a position away from the flange of the plug body, ultrasonic vibration when attaching the plug becomes difficult to be transmitted to the thin portion, and the occurrence of pinholes in the thin portion is prevented. be able to. In addition, it breaks the thin portion around the closure plate by a simple operation of rotating the direction remove the cap, in which an effect of opening operation is excellent very simply such Runado, practicality.

[Brief description of the drawings]

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

FIG. 2 is an explanatory view showing a state in which a plug and a cap in one embodiment are separated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Mouth plug 2 ... Mouth plug body 3 ... Pouring cylinder 4 ... Flange 5 ... Closer plate 6 ... Thin wall part 7,7 '... Welding foot receiver 8 ... Cap 9,9' ... Welding foot

Claims (1)

(57) [Claims] 1. A closure plate for closing a spout cylinder is provided integrally with an inside of an upper edge side of the spout cylinder of a plug body via a thin portion along a circumferential direction of an inner surface of the spout 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 cylinder, and the closing plate has a center of the pouring cylinder.
A concentric recessed welding footrest is provided for
The welding foot is positioned corresponding to the welding foot receiver, and
A set of a cap for a liquid container and a cap , wherein a foot and the welding foot support are connected by heat welding.