JP2003063544A - Cap-plugging structure for container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the feel on the mouth and to restrain drips of liquid. SOLUTION: With regard to a container 1 having an annular mouth potion 2 from which contents flow out, in a cap-plugging structure that allows a cap 3 to be screwed onto the mouth portion 2 for cap-plugging thereof, a threaded portion 2a is provided on the inner circumferential surface of the mouth portion 2 of the container 1, with a threaded portion 3a of the cap 3 being engaged with the threaded portion 2a for cap-plugging.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container closure structure, which effectively reduces the dripping that is unavoidable when the container is tilted to pour the contents from the mouth and the mouth is closed. It is intended to improve the mouth feel when the contents are drunk with the mouth directly attached.

[0002]

2. Description of the Related Art In recent years, bottle type containers (PET bottles, etc.), which are often used as containers for filling seasonings such as drinking water, juice, liquor or soy sauce, have an annular mouth portion through which the contents flow out. It is customary to attach a screw-on cap to seal the container.

By the way, since the conventional bottle type container is provided with a screw portion which engages with the cap on the outside of the mouth of the container, when the container is tilted to pour the contents (especially, the beginning and the end of the pouring are completed). However, there is a problem that the contents are unavoidably flowing along the screw part and the mouth part is soiled.

Further, this kind of bottle tends to be often used as a relatively small container for filling a beverage such as juice or tea with a filling capacity of about 500 ml,
There is also a problem that the mouth feels bad because the screw part touches the mouth when the contents are directly drinkable with the mouth attached.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to propose a novel capping structure capable of solving the above-mentioned conventional problems that have occurred in a bottle type container.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a container having an annular mouth portion for letting out contents, and in a closure structure in which a cap is screwed into the mouth portion to close the container, the inner peripheral surface of the mouth portion of the container is A cap closure structure for a container, characterized in that a screw part is provided and the screw part of the cap is engaged with the screw part to close the cap.

In the above construction, the cap has a concentric double-arranged annular wall that surrounds the mouth of the container all around inside and outside thereof, and the surface of the inner annular wall is provided with a screw adapted to the mouth of the container. Those with parts are particularly advantageous.

The mouth portion of the container is preferably made of a divergent annular body whose diameter increases toward the tip.

The cap and the mouth of the container body are
It is preferable to seal at least at two points, the tip of the mouth portion and the annular wall located inside the cap.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described more specifically with reference to the drawings. FIG. 1 shows an example in which the closure structure according to the present invention is applied to a bottle type container.

In the figure, reference numeral 1 is a bottle type container, 2 is an annular mouth portion integrally formed with the container 1, and a screw portion 2a is provided on the inner peripheral surface of the mouth portion 2 so that it goes toward the tip. It consists of a divergent annular body with a large diameter.

Further, 3 is a concentric double-arranged annular wall W ₁ , W that surrounds the mouth portion 2 of the container 1 inside and outside the entire circumference.
₂ is a cap having ₂ . This cap 3 is provided on the surface (outer side) of the annular wall W ₂ located on the inner side with the threaded portion 2
It has a threaded portion 3a adapted to a.

By covering the mouth portion 2 with the cap 3 and screwing in the cap 3, the container can be sealed.

Since the outer peripheral surface of the mouth portion 2a is smooth, the mouth feel is improved when the contents are directly applied to the mouth to drink.

Further, since the mouth portion 2 is an annular body having a divergent (lip-shaped) shape with a diameter increasing toward the tip, liquid spillage is improved, and a liquid which was inevitable in the past at the beginning or the end of pouring was inevitable. There is no contamination of the mouth 2 by anyone. still,
Of course, the present invention does not include the shape of the tip end that is widened toward the end, but includes the conventional vertical wall.

FIG. 2 is an enlarged view of the essential parts of the container shown in FIG. When attaching the cap 3 to the mouth portion 2, at least the tip of the mouth portion 2 should be attached to the cap 3
Sealing can be performed by bringing the top surface portion 3b into contact. In addition, as shown in the drawing, the lower end portion 2b of the threaded portion 2a of the base portion ₂ is brought into contact with the inner annular wall W2 of the cap 3 to further ensure the sealing.

In particular, when the seal type as shown in FIG. 2 is adopted, it is preferable that the tip of the mouth portion 2 is rounded, and the lower end portion 2b of the mouth portion 2 is
It is preferable to provide a convex portion in order to increase the surface pressure at that portion when contacting with the annular wall W ₂ . A sealing member such as packing may be arranged and placed on the top surface portion 3b of the cap 3 in advance.

FIG. 3 is a partial cross-sectional view of the outer appearance of the cap 3. A plurality of slits s can be provided along the periphery of the lower end of the annular wall W ₂ of the cap 3,
With this slit s, when the cap 3 is screwed in, the air in the container can be released, and easy screwing can be performed, and in addition to the rise in the bottle internal pressure, which is particularly remarkable when the content is a carbonated drink, It becomes possible to release the internal pressure at the time of opening the stopper, and prevent inadvertent ejection of the contents.

In a bottle-type container for filling a beverage, a pill fur proof band is usually added as a tamper-proof function, but the container according to the present invention can be applied as before.

In the present invention, the case where the present invention is applied to a bottle type container has been described, but the present invention is not limited to this and can be applied to all types of containers which are closed by screwing the cap. It is a thing.

[0021]

According to the present invention, since there is no threaded portion on the outer surface of the mouth portion, the mouth contact can be remarkably improved.

Further, by forming the tip end shape into a divergent annular body, it is possible to effectively suppress dripping, which has been unavoidable in the past when the contents are poured or finished.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view when a closure structure according to the present invention is applied to a bottle type container.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a partial cross-sectional view showing the appearance of the cap.

[Explanation of symbols]

1 bottle type container 2 mouth portion 2a threaded portion 3 the cap 3a threaded portion _{W 1} annular wall _{W 2} ring wall s slit

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Claims (4)

[Claims] 1. A closure structure in which a container having an annular mouth portion for letting out contents flows out is closed by screwing a cap into the mouth portion, and a screw portion is provided on an inner peripheral surface of the mouth portion of the container, and the screw portion is provided. A cap closure structure for a container, characterized in that the screw part of the cap is engaged with the cap to close the cap. 2. The cap has a concentric double-arranged annular wall that surrounds the mouth of the container inside and outside the circumference of the container.
The closure structure according to claim 1, wherein a threaded portion that engages with a threaded portion at the base of the container is provided on the surface of the annular wall located inside. 3. The closure structure according to claim 1, wherein the mouth portion of the container is an annular body having a divergent end, the diameter of which increases toward the tip. 4. The cap according to claim 1, wherein the cap and the mouth of the container are sealed at at least two points, that is, a tip of the mouth and an annular wall located inside the cap. The described closure structure.