JPH07237652A - Bottle inner stopper - Google Patents

Abstract

PURPOSE:To prevent an inner stopper from being buckled and deformed in the sealing of a bottle with it, without impairing the sureness of hermetical sealing and the simplicity of the pullout of the stopper from a bottle mouth. CONSTITUTION:A plurality of reinforcing ribs 7 extending vertically are provided on the internal surface of the stopper part 2a of a stopper body 2 made of synthetic resin. Without increasing the wall thickness (t) of the stopper part 2a, this prevents the stopper part 2a from being buckled and distorted when a bottle is sealed with the stopper. Also, because it is not necessary to increase the wall thickness of the stopper part 2a, the stopper part 2a can be firmly fitted all the way inside a bottle mouth A and hermetical sealing can be improved, and also it can be easily pulled out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner stopper which is removably fitted in a bottle mouth.

[0002]

2. Description of the Related Art As shown in FIG. 9, a bottle stopper 11 of this type has a flange 1 at the upper end of a stopper portion 12a which is tightly fitted in a bottle mouth A.
A plug body 12 formed by connecting 2b is formed of a synthetic resin, and a top plate 13 made of a metal plate covering the upper surface of the plug body 12 is caulkedly fitted to a flange 12b of the plug body 12. Has become. In addition, in order to improve the sealing property, the plug portion 12a
A metal foil 14 such as an aluminum foil is attached to the lower part of the.

Then, in the packaging step, after filling the contents in the bottle, the inner stopper 11 is fitted (capped) in the mouth A of the bottle, and then the sealing lid C made of a thin metal plate is placed in the bottle. It is fitted in the mouth A, and the skirt portion of the closure lid C is closed by narrowing it down to the annular groove A1 formed on the outer peripheral surface of the bottle mouth A. The skirt portion of the sealing lid C is formed with a weakening line C1 extending from the lower end portion to the upper end in an inclined shape,
It is well known that the sealing lid C is cut along the weakening line C1 to cut the sealing lid C from the bottle mouth A to open the sealing lid C.

As another example of the inner stopper, as shown in FIG. 10, a flange 12a of the stopper 12 is integrally connected to a sealing skirt portion 15 which is fitted in the bottle mouth A, and this skirt is formed. There is also one in which a radially inward annular projection 16 that engages with the annular groove A1 of the bottle mouth A is formed on the inner peripheral surface of the portion 15, and it is well known that this form is also widely used. .

[0005]

By the way, since these inner stoppers 11 seal the bottle, in order to ensure the sealing function, the outer peripheral surface of the stopper portion 12a should be the inner peripheral surface of the bottle mouth A. It is necessary to keep intimate contact over the entire circumference, and for that purpose, the stopper 12a must be fitted tightly in the bottle mouth A.

However, if the stopper portion 12a is formed so as to fit snugly inside the bottle mouth A, the stopper portion 12a and the bottle mouth A are resisted by the resistance between the stopper portion 12a and the bottle mouth A in the packaging process.
There was a case where a was buckled and deformed, and the plug portion 12a was pressed and contracted in the vertical direction, resulting in poor sealing. In order to solve this problem, it is considered that the thickness t of the plug portion 12a should be increased so as not to cause buckling deformation. However, if the thickness t of the plug portion 12a is increased, the plug portion 1
Since the rigidity of 2a becomes too high, not only the outer peripheral surface of the stopper 12a does not adhere to the inner peripheral surface of the bottle mouth A but the sealing performance deteriorates, and the inner stopper 11 is also removed from the bottle mouth A. There was a problem that it would be very troublesome.

[0007] It is an object of the present invention to provide an inner stopper capable of preventing buckling deformation at the time of stoppering without impairing the reliability of sealing and the ease of withdrawing from the bottle mouth. is there.

[0008]

In order to achieve this object, the present invention provides a stopper body which is made of synthetic resin and has a bottomed cylindrical stopper portion which is tightly fitted in the bottle mouth and a flange connected to the upper end thereof. In the inner plug formed by fitting a top plate made of a metal plate that covers the upper surface of the plug body to the flange of the plug body, "the inner peripheral surface of the plug portion of the plug body is arranged along the vertical direction. A large number of reinforcing ribs extending in a vertical direction are provided at appropriate intervals along the circumferential direction. "

[0009]

With this structure, since a plurality of vertically extending reinforcing ribs are formed on the inner peripheral surface of the plug portion, the strength of the plug portion against the compressive force from the vertical direction is significantly improved. Even if the thickness of the plug portion is not increased, it is possible to prevent the plug portion from buckling and deforming at the time of plugging in the packaging process.

Further, it is not necessary to increase the wall thickness of the plug portion, and the presence of the reinforcing rib makes the plug portion uneven in a flat cross section, and when plugging, it is fine along the circumferential direction in the plan cross section. The synergistic effect of the wrinkled state that the deformation at the time of stoppering is absorbed in the state of being dispersed over the entire circumference of the stopper, improves the compatibility of the stopper with the inner peripheral surface of the bottle mouth. Therefore, the stopper of the stopper can be kept in close contact with the entire circumference of the inner surface of the bottle mouth, and as a result, the sealing function of the bottle can be significantly improved. Moreover, since the deformation of the stopper is allowed, the inner stopper can be easily removed from the bottle mouth.

Therefore, according to the present invention, the occurrence of packaging failure due to buckling deformation at the time of stoppering in the packaging process does not impair the sealing performance of the bottle and the ease of withdrawing from the bottle mouth. It has a preventable effect. In addition, claim 2
With this configuration, by increasing the cross-sectional area of the reinforcing ribs that are located in a scattered manner, the rigidity of the plug portion with respect to an external force in the axial direction is improved, and therefore the deformation prevention during tapping can be further ensured. it can.

[0012]

Embodiments of the present invention will now be described with reference to the drawings (FIGS. 1 to 9).
It will be described based on. 1 to 4 show the first embodiment, the basic structure of the inner stopper 1 is the same as the conventional one, and a stopper portion 2a tightly fitted to the bottle mouth A is made of a relatively soft synthetic resin such as polyethylene. A plug body 2 formed by connecting a flange 2b to the upper end of the
And a top plate 3 made of a metal plate that covers the upper surface of the plug 2 is fitted to the flange 2b of the plug 2 by caulking. The top plate 3 can be manufactured from various metal plates such as a tin plate and an aluminum plate.

The plug portion 2a of the plug body 2 is formed in a tapered shape with a downward constriction as a whole and is formed in a stepped shape so that the lower portion has a small diameter, and the outer surface of the lower portion of the plug portion 2a has improved sealability. For this purpose, a metal foil 4 such as an aluminum foil is attached. The central portion of the bottom plate 2c of the plug portion 2a is formed in an upward protruding shape (the upward protruding portion is indicated by reference numeral 5).
The flange 2b of the stopper 2 is formed with different diameters so that the upper part has a large diameter and the lower part has a small diameter. The top plate 3 is caulked to the large diameter part, while the flange 2b has a top of the bottle mouth A. The portion 6 contacting the surface is formed in a saw-tooth shape in cross section.

On the inner peripheral surface of the plug portion 2a of the plug body 2, a plurality of reinforcing ribs 7 each having a triangular cross section and extending in the vertical direction are provided so as to project inward at appropriate intervals along the circumferential direction. . These reinforcing ribs 7 are formed so as to extend to the bottom surface of the plug portion 2a. In the above configuration, in the packaging step, as shown in FIG. 3, the inner stopper 1 is fitted (capped) into the bottle mouth A by pressing with the stopper B, and then, as shown in FIG.
As shown in FIG. 9, a procedure of fitting a sealing lid C made of a metal plate formed in the same manner as in FIG. 9 onto the bottle mouth A and narrowing the skirt portion of the sealing lid C into the annular groove A1 of the bottle mouth A. Done in.

However, by forming a large number of reinforcing ribs 7 on the inner peripheral surface of the stopper portion 2a of the inner stopper 1, the strength of the stopper portion 2a against compression from the vertical direction is remarkably improved. Even if the wall thickness t of 2a is not increased, it is possible to prevent the plug portion 2a from being buckled and deformed at the time of stoppering to cause defective packaging. The plug 2a does not have to be thick, and the presence of the reinforcing rib 7 causes the plug 2a to be deformed into a fine wrinkle in the circumferential direction at the time of plugging, and By absorbing the deformation at the time of dispersion in the state of being dispersed over the entire circumference, the fitting property of the stopper portion 2a with respect to the bottle mouth A is improved when the stopper portion 2a is fitted,
The stopper 2 comes into close contact with the inner peripheral surface of the bottle mouth A over the entire circumference, and therefore the sealing performance can be reliably maintained. In addition, the deformation of the stopper 2a allows the inner stopper 1 to be easily pulled out from the bottle mouth A.

In the case of bottling a liquid such as sake, by filling the contents in a heated state or packaging the contents in a decompression chamber, the inside of the bottle is decompressed, so that In general, vacuum packaging in which the inner stopper 1 is suction-held in the bottle mouth A is performed, but in the present invention, as described above, the stopper portion 2a covers the entire circumference of the bottle mouth A. Since they are in close contact with each other, the suction effect of the inner stopper 1 by vacuum packaging is also high, and in this respect also, the reliability of sealing can be improved.

When each reinforcing rib 7 extends to the bottom surface of the plug portion 2a as in the first embodiment, an appropriate rib effect can be given to the bottom plate 2c of the plug portion 2a, so that the sealing performance is further improved. There is an advantage that can be improved. In the above-described first embodiment, the inward protruding height t of the plurality of reinforcing ribs 7 is constant, but as shown as the second embodiment in FIG. 5, a large number of reinforcing ribs 7a, The lateral width dimension w and the protruding height dimension t of the reinforcing ribs 7a and 7b (which are located at eight equally divided portions in the circumferential direction in the embodiment) of the appropriate number of the ribs 7b and 7c (in other words, in the embodiment) The cross-sectional area of each of the reinforcing ribs 7c is set larger than the lateral width and height of the other reinforcing rib 7c so that the cross-sectional areas of the plurality of reinforcing ribs 7a and 7b located at intervals are larger than those of the other reinforcing ribs 7c. You may.

In the second embodiment, out of the eight reinforcing ribs 7a, 7b having a large protruding height t, four reinforcing ribs 7a extending in the cross direction in plan view are used as the upward protruding portions 5 of the plug portion 2a. And the other reinforcing ribs 7b and 7c are extended to the middle of the radius of the bottom surface of the plug 2a. In the first and second embodiments, the reinforcing ribs 7, 7a, 7b, 7c are formed in a triangular cross section, but the reinforcing rib 7 has a cross-sectional shape as shown in FIG. 6 as a third embodiment. It can have any shape.

In the fourth embodiment shown in FIG. 7, the protruding height dimension t of the reinforcing rib 7 is set so as to gradually decrease from the upper end to the lower end of the reinforcing rib 7. Further, FIG. 8 shows a fourth embodiment in which the skirt portion 8 for sealing is integrally formed with the flange 2b of the plug body 1. In addition,
In this embodiment, the reinforcing ribs 7 are formed so as to extend to the center of the bottom plate 2c (the reinforcing ribs 7 are located at the bottom plate 2c).
The height t of the protrusion is reduced so that the rigidity of the bottom plate 2c does not become excessively high).

In each of the above-mentioned embodiments, the reinforcing rib is formed so as to extend parallel to the axis of the plug, but the reinforcing rib may be formed in a state of being inclined with respect to the axis of the plug. .

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a first embodiment.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a diagram showing a stoppering step.

FIG. 4 is a cross-sectional view in a packaged state.

FIG. 5 is a plan sectional view of a second embodiment.

6A is a plan sectional view of a third embodiment, and FIG. 6B is a partially enlarged view of FIG.

FIG. 7 is a partial sectional view of a fourth embodiment.

FIG. 8 is a partially cutaway sectional view of the fifth embodiment.

FIG. 9 is a cross-sectional view showing a conventional example.

FIG. 10 is a cross-sectional view showing another conventional example.

[Explanation of symbols]

 1 Inner plug 2 Plug body 2a Plug part 2b Flange 2c Bottom plate of plug part 3 Top plate 7 Reinforcing rib

Claims (2)

[Claims] 1. A synthetic resin is used to form a plug body composed of a bottomed cylindrical plug portion which is tightly fitted in a bottle mouth and a flange connected to the upper end thereof, and the flange of the plug body is provided with the plug body. In an inner plug formed by fitting a top plate made of a metal plate covering the upper surface, a plurality of reinforcing ribs extending in the up-down direction are provided along the circumferential direction on the inner peripheral surface of the plug portion of the plug body. Bottle stoppers that are projected at appropriate intervals. 2. The "claim 1" according to claim 1, wherein among the plurality of reinforcing ribs, the cross-sectional areas of the reinforcing ribs, which are appropriately scattered in the circumferential direction, are larger than the cross-sectional areas of the other reinforcing ribs. The inside stopper of the bottle that is characterized.