JP2000326998A - Mouth structure for bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily separate the cylindrical main body from a bottle at the time of a disposal in a mouth section structure wherein the cylindrical main body made of an elastic material, which holds a plug member for sealing, is fitted on and fixed to the mouth section of the bottle. SOLUTION: On the inner peripheral surface of a cylindrical main body 3 and the outer peripheral surface of the mouth section 2 of a bottle 1, threaded sections of a multiple line thread, which screw with each other, are formed, and the threaded section which is formed on the outer peripheral surface is constituted in such a manner that a pair of thread groups 20a and 20b wherein partial threads 22, 23 and 24 having a length being shorter than one half of the outer peripheral length of the mouth section 2 are arranged in parallel in the vertical direction, are symmetrically arranged on the outer peripheral surface of the mouth section 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottle mouth structure made of glass or other materials. In particular, the present invention relates to a bottle mouth structure in which a stopper made of an elastic material such as a synthetic resin is attached to the mouth of the bottle.

[0002]

2. Description of the Related Art As shown in FIG. 15, a conventional ramune bottle has a hard synthetic resin tubular plug 3 attached to a mouth portion 2 of a glass bottle 1. The bottle 1 is sealed by a glass ball 4 housed in the stopper 3 in a retaining state.

[0003] The spout 3 comprises an inner tube portion 33 fitted inside the mouth portion 2 of the bottle 1 and an outer tube portion 32 fitted externally to the mouth portion 2. Bottle 1 containing water
Is strongly pressed into the mouth portion 2 of the bottle 1 with the stopper 2 in which the glass ball 4 is housed and held in the inner cylinder portion 33, forcibly fitting the inner cylinder portion 33 inside, and forcing the outer cylinder portion 32 Is externally fitted so as to be sealed in a sealed state. In addition, since the outer periphery of the outer cylindrical portion 32 and the outer periphery of the mouth portion 2 are provided with irregularities that mesh with each other at the time of fitting, the stopper 3 is attached to the bottle 1.
It is attached in a state where it cannot be removed.

[0004] Therefore, after the contained contents are drinked, the spout 3 made of synthetic resin, the glass bottle 1 and the glass ball 4 are made.
It is difficult to separate them from each other, and there is a problem that they cannot be separated and disposed for recycling. Also, when the bottle 1 is formed of a synthetic resin like the spout 3, the glass ball 4 used to seal the bottle 1 must be discarded separately from the bottle 1 because it is made of glass.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a bottle opening structure in which a cylindrical main body made of an elastic material for holding a sealing plug member is fixedly attached to the opening of the bottle. It is an object to make it possible to easily separate the cylindrical main body from a bottle.

[0006]

Means for Solving the Problems * 1 The technical means of the present invention for solving the above-mentioned problem is that "the inner peripheral surface of the cylindrical main body and the outer peripheral surface of the mouth of the bottle are mutually screwed. The thread portion of the multi-threaded screw to be fitted is formed, and the thread portion formed on the outer peripheral surface has partial thread portions having a length shorter than half of the outer peripheral length of the mouth portion arranged vertically. A pair of thread groups are symmetrically arranged on the outer peripheral surface of the mouth portion. " Here, the engagement height of the thread formed on the inner peripheral surface of the cylindrical main body and the outer peripheral surface of the mouth of the bottle is set to a height that can be overcome by driving of the cylindrical main body.

The above technical means operates as follows. According to the above means, the cylindrical main body made of an elastic material is driven from above the mouth of the bottle, whereby the cylindrical main body is forcibly fitted and fixed to the mouth of the bottle and the plug held by the main body. The bottle is sealed by the member. At this time, a pair of thread groups formed on the outer peripheral surface of the mouth portion and a thread portion formed on the inner peripheral surface of the cylindrical main body are mutually screw-fitted. Never fall out of the bottle. Further, at the time of disposal, the cylindrical main body can be separated by unscrewing the cylindrical main body and the bottle.

Further, since the thread portion formed on the outer peripheral surface of the mouth portion is a multi-thread screw and a pair of thread groups is symmetrically arranged, the cylindrical main body is provided at the upper end of the mouth portion. At the time of mounting, the cylindrical main body is supported at at least two places by symmetrically arranged threads.

[Others] * Item 2 In the item 1, the "the thread group is a four-start thread, and the uppermost stage of both the thread groups is the starting end of the first thread and the lower stage thereof. The starting end of the second screw thread is formed at the same height position as that of the second screw thread, "when the cylindrical main body is mounted on the upper end of the mouth of the bottle in order to attach the main body to the bottle,
Since the cylindrical main body is in contact with the start ends of the first thread and the second thread forming the thread group, it is supported at four locations on the outer peripheral surface of the mouth, and is driven by driving. The bottle can be more stably and reliably mounted.

* 3. Item 1 or 2 above, wherein each of the thread groups is arranged within a range corresponding to a circumferential angle of 120 degrees on the outer peripheral surface of the mouth of the bottle. The outer peripheral surface of the mouth between the thread groups is a smooth surface on which no threads are formed. Therefore, when a bottle having a mouth having a pair of thread groups is formed by using a mold, undercut does not occur in the mouth forming portion of the mold. Is simple.

* 4. In the paragraphs 1, 2 or 3, "The sealing plug member is a glass ball, and the glass ball is inserted into the inner cylindrical portion provided in the cylindrical main body so as to be inserted into the mouth portion. With a tight fit, the bottle is securely sealed in addition to the above effects.

* 5. In paragraphs 1, 2, 3, or 4, the paragraph "a bulge is provided at least in part between the thread groups, and the diameter of the bulge is
It is set to a value larger than the diameter of the valley of the thread group, when the mouth and the cylindrical main body are screw-fitted,
The size is set so as to be in contact with the top of the thread formed on the inner peripheral surface of the cylindrical main body. " When attaching the cylindrical main body to the mouth having a configuration in which the bulging portion is not provided on the outer peripheral surface between the thread groups, in some cases, the thread group of the mouth and the cylinder in the fitting portion The inner diameter of the cylindrical main body is partially enlarged and between the screw group and the outer peripheral surface, the cylindrical main body of the screw is in a non-contact state,
In this portion, the inner diameter of the cylindrical main body may be partially reduced, and a problem may occur that the cylindrical main body is deformed into an elliptical shape. However, here, since at least a part between the thread groups is provided with a bulging portion set to a diameter larger than the diameter of the root of the thread group, the cylinder not engaged with the thread group is provided. Since the thread of the cylindrical main body is supported by the bulging portion, deformation due to the diameter of a part of the cylindrical main body being reduced hardly occurs. For this reason, problems such as a decrease in the sealing performance of the open mouth due to the plug member due to the deformation of the cylindrical main body and difficulty in removing the cylindrical main body from being screwed are prevented.

* 6. In item 5, the item "the diameter of the bulging portion is set to a value larger than the inner diameter of the female screw of the cylindrical main body and smaller than the outer diameter of the male screw of the mouth". The cylindrical main body is more stably mounted on the mouth.

* 7. In the item 1, 2, 3, 4, 5, or 6, the item "a plurality of protrusions having the same protruding height between the screw groups as the partial screw threads forming the screw group". The protrusion is provided, and the protrusion is
When the mouth is screw-fitted to the cylindrical main body, its size and arrangement position are set so as to be able to engage with the female screw of the cylindrical main body like the thread group. '' The protrusion provided in the mouth part is partially engaged with the cylindrical main body that is not engaged with the thread group, and supports the female screw of the cylindrical main body in the radial direction. The same effect as that of the section can be obtained. Further, the protrusion is unevenly engaged with the female screw of the cylindrical main body, and the protrusion also supports the cylindrical main body in the vertical direction. Attached to.

[0015]

According to the present invention having the above configuration, the following specific effects are obtained. Since the cylindrical main body can be separated by unscrewing the cylindrical main body and the bottle attached in the retaining state, for example, a synthetic resin cylindrical main body and a glass bottle can be easily separated. Because they can be separated, they can be easily separated and disposed of for recycling. Further, since the cylindrical main body is supported at at least two places by symmetrically arranged threads, the cylindrical main body is stably mounted on the upper end of the mouth portion, and is securely attached to the bottle by driving.

Further, in addition to the above effects, in the item 2, the cylindrical main body can be more stably and securely mounted on the bottle. In section 3, in molding a bottle, it is easy to prepare a mold and mold the bottle. In paragraph 4,
The bottle is securely sealed. In item 5, since the deformation of the cylindrical main body due to partial diameter reduction is unlikely to occur, problems such as a decrease in the sealing performance of the open mouth due to the plug member and difficulty in screwing the cylindrical main body due to this are prevented. Is done. In paragraphs 6 and 7, it is more stably attached to the mouth.

[0017]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. A description will be given using a mouth structure of a ramune bottle as an example of an embodiment of the present invention. The ramune bottle of this example includes a glass bottle 1, a hard synthetic resin plug 3 that is forcibly fitted and fixed to the mouth 2 of the bottle 1 by driving, and an inner cylindrical portion of the plug 3. 33 and the bottle 1
And a glass ball 4 for sealing the glass ball.

As shown in FIG. 1, four partial screw threads 21, 22, 23,
24 threaded thread groups 20a, 20
b are formed at mutually symmetrical positions, and the thread groups 20a and 20b are screw-fitted to the four-way screw 30 formed on the inner peripheral surface of the plug 3 as shown in FIG. To
The bottle 1 is sealed by a glass ball 4 held by the plug 3.

As shown in FIG. 3, the mouth portion 2 of the bottle 1 of this example has a thread group 20a on the outer peripheral surface corresponding to a circumferential angle A of 120 degrees of the mouth portion 2 at symmetrical positions. , 20b are formed, and between each thread group 20a, 20b,
It has a smooth surface with no thread.

Each of the partial thread groups of the thread groups 20a and 20b is sequentially replaced with a first thread 21 and a second thread 2 from the top.
Assuming that the second thread 23 and the fourth thread 24 are formed, as shown in FIG. 1, the lengths of the first thread 21 and the fourth thread 24 are equal to those of the second thread 22 and the third thread 23. The first thread 21 is formed so that the position of the rear end portion thereof matches the position of the second thread 22 and the third thread 23, and the fourth thread 24 is formed of the fourth thread 24. The second thread 22 and the third thread 23 are formed so that the positions of the start ends thereof coincide with each other.

Also, the starting end 210 of the first thread 21
And the start end 220 of the second thread 22 are at the same height position, and the mouth 2 of the bottle 1 in this example has the start end 210a, 210b and the second end of the first thread 21a, 21b respectively.
The configuration is such that the start ends of the four-start screw are provided at a total of four places, namely, the start ends 220a and 220b of the screw threads 22a and 22b.

A pair of thread groups 2 provided in the mouth 2
0a and 20b have one thread group 20a.
On the extension of the partial thread 21, 22, 23, 24 of the other thread group 20, 22, 23, 24 of the other thread group 20b.
, And constitute a four-start screw as a whole. Therefore, it is screw-fitted in the same manner as a four-thread screw having a configuration in which four threads are formed along the outer periphery of the mouth portion 2.

In the mouth 2 of this example, the thread groups 20a, 2
The range where 0b is formed is within the outer peripheral surface corresponding to the circumferential angle of 120 degrees of the mouth portion 2, and each of the start ends 210a, 220a, 210b, and 22 which is the start end of the ridge forming the thread portion.
0b is also within the range of 120 degrees. In the case of a four-threaded thread, its starting end is usually located at a position where the circumference is divided into four equal parts, but as shown in FIG.
The start ends 220a and 220b on the near side in the clockwise direction are retracted from the positions of the start ends 221a and 221b of the normal second thread 22 shown by broken lines so as to fall within the range of 0 degrees, and FIG. As shown in FIG. 5, the upper part of the starting end 211a of the normal first thread 21 which is located forward in the clockwise direction and is shown by a broken line is cut off. Thereby, as shown in FIG. 4, the starting ends 210a, 220a, 210b, 2 of the thread portions of the four-threaded screw formed on the outer peripheral surface of the mouth portion 2 are formed.
20b is located within a range corresponding to a circumferential angle of 120 degrees, and each of the start ends 210a, 220a, 210b, 22
0b is the same height position.

The bottle 1 is formed by a metal mold which is symmetrical with respect to the alternate long and short dash line PL shown in FIGS. When a bottle having a mouth structure in which a thread portion having a half or more of the periphery of the mouth is formed by a similar method is formed, a center portion and an end portion of the mold (the one-dot chain line PL) are formed.
(In the vicinity), the height position where the thread is formed is different, so that an undercut occurs in the molded portion, and it is difficult to release the mold from the bottle 1 after molding. However, in this example, the thread groups 20a and 20b are formed within a range corresponding to the circumferential angle A of 120 degrees of the mouth portion 2 and the vicinity of the one-dot chain line PL is a smooth surface. As a result, undercutting that hinders mold release does not occur, and mold release from the bottle 1 is simple.

As shown in FIGS. 5 and 6, the spout 3 has an outer cylindrical portion 32 fitted to the mouth 2 of the bottle 1 and a spout 3 of the bottle 1 in the same manner as the spout 3 of a conventional ramune bottle. An inner cylindrical portion 33 is fitted in the mouth portion 2, and an opening portion 31 having a diameter smaller than the inner diameter of the inner cylindrical portion 33 penetrates the top of the inner cylindrical portion 33. The inner cylinder 3
3, the lower end portion is formed thinner than the upper end portion,
The outer diameter of the upper end is set slightly larger than the inner diameter of the mouth 2 of the bottle 1. Therefore, when the inner cylindrical portion 33 is forcibly fitted into the upper end of the mouth portion 2 by driving, the inner cylindrical portion 33 is elastically deformed inward, and the inner diameter of the thinly formed lower portion is contracted. It will be. Further, on the inner peripheral surface of the outer cylindrical portion 32, a screw portion formed on the mouth portion 2 of the bottle 1 is screw-fitted, and a screw thread portion formed on the mouth portion 2 by driving is formed. A four-start screw 30 set at an engagement height capable of overcoming each other is formed over the entire circumference.

Next, when the spout 3 is attached to the ramune bottle 1 actually filled with the contents to seal the bottle,
After drinking the contents, said bottle 1, spout 3 and glass ball 4
Will be described respectively.

A glass ball 4 as a plug material is housed in the inner cylindrical portion 33 of the mouth plug 3 in a tightly fitted state, and the bottle 1 in which the contents are housed.
When the plug 3 is placed on the open end 25 of the mouth 2, as shown in FIG. 6, the periphery of the lower end of the plug 3 is formed by a pair of thread groups 20 a formed on the outer peripheral surface of the mouth 2. The starting ends 210a, 21 of the first thread 21 and the second thread 22 of 20b
0b, 220a, and 220b are stably supported. When the plug 3 is driven from above in this state, the inner cylindrical portion 33 of the plug 3 is contracted, and the glass ball 4 accommodated therein is pressed from the side by the inner peripheral wall of the inner cylindrical portion 33, and As the content of carbonated water as the content is pushed upward by the gas pressure, the lower peripheral edge of the opening 31 at the top of the plug 3 and the inner peripheral surface of the inner cylindrical portion 33 are sealed.
As shown in the figure, the bottle 1 is closed in a sealed state.

When the bottle 1 is to be opened, the glass ball 4 is forcibly pushed by a ball push or the like from above the open mouth portion 31 at the top, and is detached from the inside of the inner cylindrical portion 33. At this time, the inner cylindrical portion 33 contracted by the pressing force from above is elastically deformed to expand its inner diameter, and the glass ball 4 is detached from the inner cylindrical portion 33 and falls into the bottle 1. In this state, it is possible to drink the content from the opening 31.

After the beverage, the bottle 1 and the spout 3 can be easily separated by unscrewing. Also, by removing the plug 3, the glass ball 4 dropped into the bottle 1 at the time of opening can be easily removed, and the plug 3 made of synthetic resin, the glass bottle 1 and the glass ball can be easily removed. 4 can be discarded separately.

FIGS. 7, 8 and 9 show a ramune bottle according to another embodiment. This is a pair of thread groups 20a, 20b composed of partial threads 21, 22, 23, 24 on the outer peripheral surface corresponding to a circumferential angle A of 120 degrees of the mouth 2 of the bottle 1 as in the above-described embodiment. As shown in FIG. 7, a rectangular convex portion 5 is formed on the outer peripheral surface of the above-described example where no thread is formed between the thread groups 20a and 20b. It was made.

The convex portion 5 is provided with the thread groups 20a, 20a.
It is longer than the range where b is formed, and is formed at a position separated by a predetermined distance from the end of each of the thread groups 20a and 20b as shown in FIGS.
As shown by the wavy line in FIG. 9, the protrusion height H of the convex portion 5 is the difference between the height of the partial screw threads 21, 22, 23, and 24 constituting the screw thread groups 20 a and 20 b and the height of the screw groove. The height is set to an intermediate height. Therefore, the diameter of the outer peripheral surface of the mouth 2 on which the convex portion 5 is formed is smaller than the outer diameter of the male screw formed on the outer periphery of the mouth 2, and the diameter of the female screw formed on the inner peripheral surface of the plug 3. When the plug 3 is attached, the convex portion 5 is lightly pressed against the top of the thread forming the thread portion 30 provided on the inner peripheral surface of the plug 3 when the plug 3 is attached. It is abutted in the state of doing.

In the case of the mouth portion 2 in which the convex portion 5 is not provided between the thread groups 20a and 20b, the engagement between the thread groups 20a and 20b and the thread portion 30 of the spout 3 results. The inner diameter of the plug 3 is the same as the thread groups 20a, 20
b is partially enlarged, so that the thread 3
0 and a smooth outer peripheral surface between the thread groups 20a and 20b are formed so as not to contact each other. In this non-contact portion, the plug 3 may be partially reduced in diameter and deformed to have an elliptical shape.

In this embodiment, the thread group 20a,
The protrusions 5 provided between the thread groups 20b
Since the stopper 3 is in contact with the top of the threaded portion 30 of the plug 3 which is not engaged with the plug 20a and 20b, a part of the diameter of the plug 3 is not deformed due to a reduction in diameter, so that the port 2 is stable. Attached to.

Each thread group 20a, 2a of the convex portion 5
The end on the 0b side is the convex portion in which the thread portion 30 of the plug 3 engaged with the thread groove of the thread group 20a, 20b is set to a projecting height larger than the height of the thread groove. Part 5
It is a gentle slope that is continuous with the screw groove so that it can easily get on.

The procedure for closing and opening the ramune bottle in this example is performed in the same manner as in the above-described example. When the screw 3 is loosened between the plug 3 and the mouth 2, the plug 3 is removed. Since the threads of the thread portion 30 of the plug 3 are slid while being supported by the projections 5, the plug 3 is easily unscrewed without being deformed. Further, when the ramune bottle of this example is molded by a mold, the undercut that prevents the mold from being released does not occur as in the above-described example, so that the molding is easy.

FIGS. 10 and 11 show another embodiment of a ramune bottle. In this embodiment, two circular protrusions 6 and 6 are vertically formed between the thread groups 20a and 20b provided with the rectangular protrusions 5 in the above-described embodiment.

As shown in FIG. 10, the projections 6 and 6 are located between the respective thread groups 20a and 20b (on the dashed line PL), and are ordinary four-thread screws shown by broken lines. The protrusions 6, 6 are formed at positions corresponding to the ridges 200, 200, and the protrusion heights of the protrusions 6, 6 are, as shown in FIG. 11, the partial ridges 21, 22, constituting the thread groups 20a, 20b. The height is set to the same height as 23 and 24.

The protrusions 6 and 6 of this example are formed in a mountain-shaped cross section whose diameter is reduced from the outer peripheral surface of the mouth portion 2 toward the top.
The lower ends of the projections 6 and 6 are threaded 20 indicated by broken lines.
Although it coincides with the lower ridgeline of 0,200, its upper end is sized to protrude above the upper ridgeline of the threads 200,200.

When the plug 3 is attached to the mouth portion 2, the threads provided on the inner peripheral surface of the plug 3 correspond to the protrusions 6, 6.
Since the plug 3 is in contact with and supported from below along the curve of the crest at the upper end of the plug 6, the plug 3 does not easily swing in the vertical direction. Therefore, there is no deformation due to a reduction in a part of the diameter of the plug 3 and the plug 3 is stably attached to the mouth portion 2.

The procedure for closing and opening the ramune bottle of this embodiment is performed in the same manner as in the above-described embodiment, and the plug 3 can be removed by unscrewing the plug 3 and the mouth 2. Further, as in the above-described example, the undercut does not occur in the molding of the ramune bottle of this example.

FIGS. 12, 13 and 14 show another embodiment of a ramune bottle. As shown in FIGS. 12 and 13, the ramune bottle of this example is similar to the ramune bottle of the above-described example.
Four bottle screws consisting of a pair of thread groups 20a and 20b
7, a rectangular protrusion 5 is provided between the screw threads 20a and 20b, as in the example of FIG. On the surface, two circular projections 61, 61 are provided above and below integrally with this projection.

The thread groups 20a and 20b in this example are:
As shown in FIG. 12, the thread group 2 of the above-described example of a ramune bottle
Since the bottle 1 and the spout 3 in this example are formed in opposite directions because they are formed in the opposite directions to 0a and 20b, they are screwed together when twisted counterclockwise and screwed together when twisted clockwise. Is solved. The screw groups 20a and 20b are connected to the bottle 1
Formed on the outer peripheral surface corresponding to a circumferential angle B of 150 degrees of the mouth portion 2 and the width of the protrusion 5
Since the width of the thread groups 20a and 20b is set slightly wider than the distance between the thread groups 20a and 20b, as shown in FIG.
The end of the partial thread 21, 22, 23, 24 that constitutes 0b and the end of the projection 5 are continuous.

Here, the projecting height of the projection 5 is set so as to be intermediate between the heights of the partial screw threads 21, 22, 23, 24 and the height of the screw groove. 6
Like the protrusions 6 and 6 in FIG. 10 described above, the protrusions 1 and 61 are provided on the surface of the convex portion 5 so as to coincide with the circumferential position where the thread of the ordinary four-thread screw is formed. The protruding height is set to be the same as the height of the partial threads 21, 22, 23, 24. Thereby, when the plug 3 is attached to the mouth portion 2 of the ramune bottle of this example, the convex portion 5 abuts against and supports the female screw thread of the inner peripheral surface of the plug 3, and Since the projections 61, 61 engage with the threads of the female screw of the plug 3 and act as hooks, the plug 3 is less likely to be deformed in the radial direction or rocked in the vertical direction, so that the plug 3 is more stably formed. It is attached to the mouth 2.

Further, since the ramune bottle of this example has a reverse screw, when drinking the contents contained in the ramune bottle,
Even if it is attempted to remove the plug 3 by mistake by unscrewing the mouth 2, it cannot be easily removed because the mouth 2 and the plug 3 are reverse screws. Therefore, carelessly using the plug 3
Is prevented from being removed.

In the above-described ramune bottle, the bottle 1 is made of glass, but may be made of a synthetic resin such as PET or vinyl chloride. In addition, the screw fitting between the mouth 2 and the plug 3 of the bottle 1 is a four-threaded screw composed of the thread groups 20a and 20b, but may be a multi-threaded screw such as a six-threaded screw or an eight-threaded screw.

In the ramune bottle of the above-described example, the protrusion 5
Is a rectangular projection 5 between the thread groups 20a and 20b.
Are provided singly on the outer peripheral surface, but a plurality of convex portions 5, 5 may be provided at predetermined intervals.

In the ramune bottle of the above-described example, the protrusions 6 and 61 are provided at upper and lower positions along the normal four-threaded screw threads 200 and 200 shown by wavy lines in FIG. A configuration in which four protrusions 6 and 61 are formed in the vertical direction by being formed at the start end and the rear end of 200, 200 may be adopted. Further, the projections 6 and 61 are circular, but may be other shapes such as an elliptical shape.

[Brief description of the drawings]

FIG. 1 is a front view of a ramune bottle according to an embodiment of the present invention.

FIG. 2 is a side view of the ramune bottle of FIG. 1;

FIG. 3 is a plan view of a mouth portion of the ramune bottle of FIG. 1;

FIG. 4 is a side view of a mouth portion of a ramune bottle.

FIG. 5 is a cross-sectional view of a mouth portion of a ramune bottle with a cylindrical main body attached.

FIG. 6 is a partial cross-sectional view of a mouth portion of a ramune bottle with a cylindrical main body placed thereon.

FIG. 7 is a side view of a ramune bottle according to another embodiment of the present invention.

FIG. 8 is a plan view of a mouth portion of the ramune bottle of FIG. 7;

FIG. 9 is a side view of the mouth of the ramune bottle of FIG. 7;

FIG. 10 is a side view of a mouth portion of a ramune bottle according to another embodiment of the present invention.

FIG. 11 is a plan view of the mouth of the ramune bottle of FIG. 10;

FIG. 12 is a front view of a ramune bottle according to another embodiment of the present invention.

FIG. 13 is a side view of the ramune bottle of FIG. 12;

14 is a plan view of a mouth portion of the ramune bottle of FIG.

FIG. 15 is a partial cross-sectional view of a mouth portion of a conventional Ramune bottle.

[Explanation of symbols]

 (1) ・ ・ ・ Bottle (2) ・ ・ ・ Mouth (20a) (20b) ・ ・ ・ Thread group (21) (22) (23) (24) ・ ・ ・ Partial thread (3) ・ ・・ Mouth plug (4) ・ ・ ・ Glass ball (5) ・ ・ ・ Protrusion (6) (61) ・ ・ ・ Protrusion

Claims (7)

[Claims] 1. A bottle mouth structure in which a cylindrical main body made of an elastic material for holding a sealing plug member is fixedly attached to a mouth of a bottle, wherein an inner peripheral surface of the cylindrical main body and the mouth of the bottle are provided. The outer peripheral surface of the portion is formed with a thread portion of a multi-thread screw that is screw-fitted to each other, and the thread portion formed on the outer peripheral surface is a portion having a length shorter than half the outer peripheral length of the mouth portion. A mouth structure of a bottle, wherein a pair of thread groups in which threads are arranged vertically are symmetrically arranged on the outer peripheral surface of the mouth. 2. The bottle mouth structure according to claim 1, wherein the thread group is a four-threaded screw, and the uppermost stage of both the thread groups is a starting end of a first thread and a lower stage thereof. And a start end of the second screw thread formed at the same height as that of the bottle. 3. The bottle mouth structure according to claim 1, wherein each of the thread groups is arranged within a range corresponding to a circumferential angle of 120 degrees on the outer peripheral surface of the bottle mouth. The configuration of the mouth of the bottle. 4. The bottle mouth structure according to claim 1, 2 or 3, wherein the sealing plug member is a glass ball, and the glass ball is provided in a cylindrical main body so as to be inserted into the mouth. The mouth structure of the bottle, which is tightly fitted in the inner cylinder part. 5. The bottle mouth structure according to claim 1, 2, 3 or 4, wherein a bulging part is provided at least in a part between the thread groups, and the diameter of the bulging part is The value is set to a value larger than the diameter of the valley of the thread group, and when the mouth portion and the cylindrical body are screw-fitted, the top of the thread formed on the inner peripheral surface of the cylindrical body. The mouth structure of the bottle is set to the size that can be contacted with the bottle. 6. The bottle mouth structure according to claim 5, wherein the diameter of the bulging portion is larger than the inner diameter of the female screw of the cylindrical main body and smaller than the outer diameter of the male screw of the mouth. Set the mouth structure of the bottle. 7. The bottle mouth structure according to claim 1, 2, 3, 4, 5, or 6, wherein a distance between the thread groups is substantially the same as a partial thread constituting the thread group. A plurality of protrusions having a protruding height are provided, and the protrusions can engage with the female screw of the cylindrical main body like the thread group when the mouth portion is screw-fitted to the cylindrical main body. The mouth structure of the bottle, whose size and location are set.