JP2000128198A - Stopper for container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a stopper for a container hardly slip off from the opening of the container, and to prevent the stopper for the container from slipping off from the opening even when the internal pressure of the container increases. SOLUTION: In the stopper 12 for the container, which has a stopper main body 13 made of a synthetic resin and can hermetically seal a bottle mouth 10 with the stopper main body 13 inserted in the bottle mouth 10 of the bottle 11, the stopper main body 13 has a small-diameter part 6 and a large-diameter part 5 each of which is formed of a cylindrical peripheral-face, and the peripheral face of the large-diameter part 5 and the circular internal face of the bottle mouth 10 are in firm contact with each other with the stopper main body 13 inserted in the bottle mouth 10. The small- diameter part 6 is situated nearer to a hollow part 17 in the bottle 11 than the large- diameter part 5, and two projections 14 which abut on the internal face of the bottle mouth 10 are provided in the range of approximately 105 deg. or less on the peripheral face of the small-diameter part 6. Also, the stopper main body 13 is provided, on its external face, with four grooves 15, which allow the hollow part 17 in the bottle 11 and the outside of the bottle 11 to communicate with each other with the stopper main body 13 hermetically sealing the bottle mouth 10 moved a specific length in the direction where it becomes detached from the bottle mouth 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container stopper for sealing an opening of a container such as a glass bottle.

[0002]

2. Description of the Related Art An example of the conventional container stopper will be described with reference to FIGS. This container stopper 1 is used as a stopper for a single-size bottle 11 of sake or the like. As shown in FIG. 6, the container stopper 1 has an outer wall 2 and an inner wall 3 each formed in a short cylindrical shape. The outer wall portion 2 and the inner wall portion 3 are arranged at an interval from each other, and their lower ends are connected to each other. Outer wall 2
Has a flange portion 4 formed at the upper end thereof along the outer periphery thereof, and a large diameter portion 5 formed at the center. A small diameter portion 6 having a smaller diameter than the large diameter portion 5 is formed at a lower portion of the outer wall portion 2. The upper opening of the inner side wall 3 is
Is blocked by Furthermore, the small-diameter portion 6 of the container stopper 1
Is provided from the lower side so as to cover from below. The outer wall portion 2 and the inner wall portion 3 constitute a plug body 9, and the plug body 9 and the flange portion 4 are made of synthetic resin.

[0003] The container stopper 1 comprises a large diameter portion 5 and a cover 8.
Is formed to be larger than the inner diameter of the bottle opening (opening) 10, so that the lower surface 4a of the flange-shaped portion 4 has an upper edge (opening edge) as shown in FIG. With the container stopper 1 inserted into the bottle mouth 10 until it comes into contact with 10 a, the stopper body 9 is compressed and the outer peripheral surfaces of the large diameter portion 5 and the coating 8 become the inner periphery of the bottle mouth 10. The container stopper 1 is pressed against the surface 10b so that the container stopper 1 does not come off from the bottle mouth 10. Then, the hermetically sealed state is maintained by the close contact between the outer peripheral surface of the large diameter portion 5 and the inner peripheral surface 10b of the bottle mouth portion 10.

[0005] As shown in FIG. 5, one of the reasons why the small diameter portion 6 is covered with the cover 8 is as follows.
Even if there is a variation in the inner diameter of 0, the container stopper 1 inserted into the bottle mouth 10 is not easily detached, and the container stopper 1 can be inserted into the bottle mouth 10 with an appropriate force. is there. In other words, although the inner diameter of the bottle mouth 10 varies at the time of manufacture, it does not matter whether the inside diameter of the bottle mouth 10 is at the upper limit value or the lower limit value within the allowable range.
It is necessary to make it difficult for the container stopper 1 inserted into the bottle 0 to come off, and to be able to insert the container stopper 1 into the bottle mouth 10 with an appropriate force. Therefore, the covering 8 is attached to the small diameter portion 6.
Is provided, when the container stopper 1 is inserted into the bottle mouth 10, the cover 8 is deformed into a shape corresponding to the inner diameter of the bottle mouth 10, and as a result, the above requirement can be satisfied.

[0005]

However, FIG. 5 and FIG.
In the conventional container stopper 1 shown in (1), it is necessary to provide the cover 8, so that the cost is increased by the cover 8, and there is a problem that it takes time to cover the cover 8 with the small diameter portion 6. When the used container stopper 1 is reused as a resource, it is necessary to separate the cover 8 made of aluminum foil from the portion other than the cover 8 made of synthetic resin (such as the plug body 9), There is a problem that this sorting work also takes time.

[0006] The cover 8 can prevent the container stopper 1 from coming off from the bottle mouth 10. For example, the internal pressure of the bottle 11 becomes higher than a certain level due to an increase in room temperature where the bottle 11 is stored. When the container stopper 1 rises to
May deviate from When the container stopper 1 comes off from the bottle mouth 10, foreign matter may enter from the bottle mouth 10, and
When the bottle 11 falls, there is a problem that the contents are spilled.

According to the present invention, there is provided a container stopper which is hard to come off from an opening of the container, and when the internal pressure of the container rises to a certain level or more, the gas in the container is released and the container stopper does not come off from the opening. It is an object of the present invention to provide a container stopper to be used.

[0008]

According to a first aspect of the present invention, there is provided a container having a plug body made of synthetic resin, which can be sealed with the plug body inserted into the opening of the container. In the plug, the plug main body has a small diameter portion and a large diameter portion each formed on the outer peripheral surface of a cylindrical shape, and the plug main body is inserted into the opening, and the large diameter is formed. The outer peripheral surface of the portion and the inner peripheral surface of the opening are in close contact with each other, and the small diameter portion is located closer to the cavity in the container than the large diameter portion,
A projection or a ridge that is in contact with the inner surface of the opening is provided within a range of about 180 ° or less of the outer peripheral surface of the small-diameter portion.

According to a second aspect of the present invention, there is provided a container plug having a synthetic resin stopper body, wherein the stopper body can be sealed with the stopper body inserted into the container opening. An outer surface of the plug main body is formed with a groove communicating with the cavity inside the container and the outside of the container in a state where the plug main body in a state of sealing the part has moved by a predetermined length or more in a direction away from the opening. It is characterized by being provided in.

According to a third aspect of the present invention, there is provided a container plug having a synthetic resin plug main body, wherein the plug main body is inserted into the container opening and the opening can be sealed. The main body has a small-diameter portion and a large-diameter portion, each of which is formed by a cylindrical outer peripheral surface, and in a state where the plug main body is inserted into the opening, the outer peripheral surface of the large-diameter portion and The inner peripheral surface of the opening is in close contact with each other, the small-diameter portion is located closer to the cavity in the container than the large-diameter portion, and the opening is formed within a range of about 180 ° or less of the outer peripheral surface of the small-diameter portion. A projection or a ridge which is provided in contact with an inner surface of the opening portion, and in a state where the stopper main body in a state of sealing the opening has moved a predetermined length or more in a direction in which the stopper body comes off from the opening, the cavity in the container A groove communicating with the outside of the container is provided on the outer surface of the plug body. It is an.

According to the first and third aspects of the invention, the outer peripheral surface of the large-diameter portion is in close contact with the inner peripheral surface of the opening, and the outer peripheral surface of the small-diameter portion is inserted with the container plug inserted into the opening of the container. There is a gap between the opening and the inner peripheral surface of the opening. Then, a protrusion or a ridge (hereinafter, referred to as a protrusion or the like) comes into contact with the inner surface of the opening.
In this sealed state, when the pressure in the cavity of the container increases due to, for example, an increase in temperature, a force in a direction in which the container stopper is released is applied by the pressure. Here, there is a gap between the surface of the small-diameter portion on which the projection or the like is not provided and the inner peripheral surface of the opening, and the projection or the like is provided within a range of about 180 ° or less of the outer peripheral surface of the small-diameter portion. Therefore, when the pressure in the cavity rises above a certain level, the container stopper tilts in such a direction that both surfaces approach each other. When the container stopper is tilted, the contact pressure between the inner peripheral surface of the opening and the corresponding portion of the stopper body that contacts the inner peripheral surface increases, thereby making it difficult for the container stopper to come off from the opening. Can be.

According to the second and third aspects of the invention, the outer peripheral surface of the plug main body is in close contact with the inner peripheral surface of the opening to seal the opening when the container plug is inserted into the opening of the container. be able to. In this sealed state, when the pressure in the cavity of the container increases due to, for example, an increase in temperature, a force in a direction in which the container stopper is released is applied by the pressure. When the pressure in the cavity rises to a certain level or more and the plug main body moves a predetermined length in a direction away from the opening, the groove provided on the outer surface of the plug main body forms a cavity in the container. And the outside of the container are communicated with each other, and the increased pressure gas in the cavity (the pressure gas in which the liquid in the container has evaporated and the compressed air in the container)
Can be discharged to the outside of the container through this groove.
This can prevent the container stopper from coming off the opening.

According to the third aspect of the present invention, when the pressure in the cavity of the container rises due to, for example, a rise in temperature in a state where the container stopper is inserted into the opening of the container and the opening is sealed, the container stopper is caused by this pressure. A force in the direction of coming off is applied. At this time, first, when the pressure in the cavity rises to a certain level or more, the container stopper is inclined, so that the container stopper is less likely to come off from the opening. Next, when the pressure in the cavity further rises and the plug body moves a predetermined length or more in a direction away from the opening, the pressure gas in the cavity is transferred from the groove provided on the outer surface of the plug body to the container. Can be discharged outside. This can prevent the container stopper from coming off the opening.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a container stopper according to the present invention will be described with reference to the drawings. This container stopper 12 is used as a stopper for a single jar (container) 11 of sake or the like, similarly to a conventional one, and is made of synthetic resin. As shown in FIG. 3, the container stopper 12 includes an outer wall portion 2 and an inner wall portion 3 each having a substantially short cylindrical shape. The outer wall portion 2 and the inner wall portion 3 are arranged at an interval from each other, and their lower ends are connected to each other. The outer wall portion 2 has a flange portion 4 formed along the outer periphery of the upper end portion, and a large diameter portion 5 formed at the center portion. A small diameter portion 6 having a smaller diameter than the large diameter portion 5 is formed at a lower portion of the outer wall portion 2. The upper opening of the inner side wall 3 is
Is blocked by The outer wall 2 and the inner wall 3
Constitutes the plug main body 13.

The outer diameter of the large-diameter portion 5 of the container stopper 12 is
The inner diameter of the bottle opening 10 (opening) of the bottle 11 is larger than the inner diameter of the bottle 11, and therefore, as shown in FIG.
The plug body 13 is compressed and the outer peripheral surface of the large-diameter portion 5 in a state where the container stopper 12 is inserted into the bottle opening 10 until the lower surface 4a of the container abuts on the upper edge (opening edge) 10a of the bottle opening 10. Closely adheres to the inner peripheral surface 10b of the bottle mouth portion 10, thereby
The sealed state of 0 is maintained. Since the outer peripheral surface of the large diameter portion 5 and the inner peripheral surface 10b of the bottle mouth portion 10 are in pressure contact with each other, the container stopper 12 is held so as not to come off from the bottle mouth portion 10.

Further, as shown in FIGS. 1, 4B and 3, two small projections 14 are provided at the lower portion of the outer peripheral surface of the small diameter portion 6. As shown in FIG. 4B, the two projections 14 are about 105 mm apart from each other along the circumferential direction of the outer peripheral surface of the small diameter portion 6.
It is provided at a position forming an angle of ° (= α). Each protrusion 14
The height of the front end portion in the protruding direction is substantially equal to the radius of the large-diameter portion 5.

Further, as shown in FIGS. 1, 4 (b) and 3, the outer peripheral surface of the small diameter portion 6 is provided with four grooves 15 along the longitudinal direction of the container plug 12. . These four grooves 1
As shown in FIG. 4B, 5 is provided at a position where adjacent ones along the circumferential direction of the outer peripheral surface of the small diameter portion 6 form an angle of about 90 ° with each other. The upper end of each of the four grooves 15 enters the lower edge of the large-diameter portion 5, and the lower edge of the large-diameter portion 5 into which the upper end of each groove 15 enters is a rectangular recess 16. Is provided. Each recess 16 has a bottom surface at the same height as the outer peripheral surface of the small-diameter portion 6, and an upper end portion of each of the four grooves 15 is formed on the bottom surface.

The diameter A of the large diameter portion 5 is about 20.6 m
m, the maximum diameter B of the small diameter portion 6 is about 19.9 mm,
Has a diameter C of about 28.5 mm. The length of the large diameter portion 5 in the center line direction is about 5 mm, and the length of the small diameter portion 6 in the center line direction is about 8 mm. The width of the groove 15 is 1 to 2 mm, and the groove 1
5 has a depth of 0.2 to 0.5 mm, the width of the recess 16 is about 2.5 to 3 mm, and the length of the recess 16 in the center line direction is about 1 to 2 mm. The width of the projection 14 is about 0.5 to 1 m
m, the length of the protrusion 14 in the center line direction is 2 to 3 mm. The inner diameter of the bottle opening 10 is about 19.2 to 20.2 mm.

According to the container stopper 12 constructed as described above, as shown in FIG.
The outer peripheral surface of the large-diameter portion 5 is in close contact with the inner peripheral surface 10b of the bottle mouth portion 10 in a state where the outer peripheral surface of the small-diameter portion 6 and the inner peripheral surface 10b of the bottle mouth portion 10 are inserted. There is a gap 19 between them. Then, each of the two projections 14 is formed on the inner surface 10 of the bottle opening 10.
Contact with b. In this hermetically sealed state, if the pressure in the cavity 17 of the bottle 11 increases due to, for example, an increase in temperature, a force is applied to the container stopper 12 (upward direction) by the pressure. Here, a gap 19 exists between the surface 18 of the small diameter portion 6 on the side where the projection 14 is not provided and the inner peripheral surface 10 b of the bottle mouth portion 10, and is approximately 180 ° or less of the outer peripheral surface of the small diameter portion 6. Since the projections 14 are provided within the range (positions at an angle of about 105 °), when the pressure in the cavity 17 rises to a certain level or more, the container stopper 12 moves as shown in FIG. To
Both surfaces 18 and 10b are inclined in a direction approaching each other. In FIG. 1B, the left side of the container stopper 12 is raised. When the container stopper 12 is tilted, the inner peripheral surface 1
0b and the corresponding portions of the plug main body portion 13 that come into contact with the inner peripheral surface 10b, in particular, the contact pressure between the upper right portion 20 and the lower left portion 21 of the large diameter portion 5 shown in FIG. This makes it difficult for the container stopper 12 to come off the bottle opening 10. In this state, the sealed state of the bottle mouth portion 10 can be maintained, so that the evaporation and the fragrance of, for example, sake etc. contained in the bottle can be prevented from scattering. When the container stopper 12 is inclined, the contact pressure between the predetermined portions 20 and 21 of the large-diameter portion 5 and the inner peripheral surface 10b of the bottle opening 10 is increased because the large diameter of the inclined container stopper 12 is large. Part 5
Is cut in the horizontal direction, the profile of the cut surface becomes an elliptical shape spreading in the inclination direction.

Then, as shown in FIG.
When the pressure in the inside 7 further increases and reaches a certain level or more, the stopper main body 13 moves by a predetermined length or more in a direction away from the bottle mouth 10 and is provided on the lower edge of the large diameter portion 5. Recess 16
Is exposed to the outside of the cavity 17 beyond the short cylindrical contact surface where the outer peripheral surface of the large diameter portion 5 and the inner peripheral surface 10b of the bottle mouth portion 10 adhere to each other. Groove 1
5 communicates the hollow portion 17 of the bottle 11 with the outside of the bottle 11, and increases the pressure gas in the hollow portion 17 (evaporation pressure gas of alcohol contained in sake and pressure in the hollow portion 17). Air) can be discharged out of the bottle 11 through this groove 15. This makes it possible to prevent the container stopper 12 from coming off the bottle opening 10. Therefore, it is possible to prevent foreign substances from being mixed in from the bottle mouth portion 10 and to prevent the bottle 1
Even if one falls, the contents can be prevented from spilling.

However, in the above embodiment, the two projections 1
4 is provided at a position on the outer peripheral surface of the small-diameter portion 6 at an angle of about 105 °,
It is good also as a structure which provided one or two or more projections 14 in the range below °. Preferably, the angle is 1 ° within a range of 120 ° or less.
Alternatively, a configuration in which two or more projections 14 are provided is preferable. Then, as shown in FIG.
Although the shape extends in the length direction of 2 (the center line direction of the large diameter portion 5), the shape may extend in other directions, for example, the direction along the circumference of the small diameter portion 6. Further, the projection 14 is provided, but a ridge may be used instead.
In short, as shown in FIG. 1A, in a state where the container stopper 12 is inserted into the bottle mouth 10, the protrusion 14 comes into contact with the inner peripheral surface 10 b of the bottle mouth 10, and the protrusion 14 is provided. The surface 18 of the small-diameter portion 6 on the other side and the inner peripheral surface 10b of the bottle opening 10
When a force is applied to the container stopper 12 in a direction in which the container stopper 12 is disengaged, as shown in FIG. 1B, the projection 14 or the ridge ( (Not shown) may be provided.

In the above embodiment, the four grooves 15
However, instead of this, a configuration in which a number of grooves 15 other than four may be provided may be adopted. In short, the bottle mouth 10
As shown in FIG. 2, when the container stopper 12 is moved by a predetermined length or more in the direction in which the container stopper 12 is removed, the groove 15 is formed so that the cavity 17 of the bottle 11 communicates with the outside of the bottle 11.
May be provided. In addition, since it is necessary to release the pressure gas in the cavity 17 to the outside air before the container stopper 12 comes off, when the number of the grooves 15 is reduced,
It is necessary to increase the cross-sectional area of the groove 15. If the cross-sectional area of the groove 15 is increased, the liquid contained in the container may spill outside through the groove 15 when the container falls down. Therefore, it is necessary to determine the cross-sectional area and the number of the grooves 15 so that the liquid does not easily leak from the grooves 15.

Further, in the above-described embodiment, the container stopper 12 of the present invention is described as an example of a one-shoulder bottle stopper. However, the present invention is also applied to a stopper of a ceramic or synthetic resin container, for example. can do.

The container stopper 12 of the above embodiment is
The projection 14 and the groove 15 are provided.
And the groove 15 may be provided. When the pressure in the cavity 17 of the bottle rises to a certain level or higher, the container stopper having the groove 15 omitted and having only the projection 14 is inclined with the bottle mouth 10 sealed in the above-described embodiment. As described above, the container stopper can be made hard to come off from the bottle mouth portion 10, thereby preventing the evaporation of the sake and the fragrance of the sake filled in the bottle. When the pressure in the cavity 17 of the bottle 11 rises to a certain level or higher, the stopper body of the container stopper having only the groove 15 without the protrusion 14 comes off the stopper body as described in the above embodiment. Direction, the pressure gas in the cavity 17 of the bottle 11 can be released to the outside of the bottle 11 through the groove 15 so that the container stopper does not come off the bottle mouth 10. Can be Although not shown in the drawings, in the case of a container stopper having only the groove 15 without the projection 14, the outer peripheral surface of the stopper body may be formed in a short cylindrical shape having a constant diameter.

[0025]

According to the first and third aspects of the present invention, in a state where a container stopper is inserted into an opening of a container and the opening is sealed, for example, the pressure in the cavity of the container is kept constant by a rise in temperature. When the pressure rises as described above, a force is applied to the container stopper in a direction in which the container stopper is released, and the container stopper is inclined by being inserted into the opening by this force. When the container stopper is tilted, the contact pressure between the inner peripheral surface of the opening and the corresponding portion of the stopper body that contacts the inner peripheral surface increases, thereby making it difficult for the container stopper to come off from the opening. Can be. As described above, according to the container stoppers according to the first and third inventions, the opening portion is provided without providing the cover 8 made of aluminum foil as in the conventional container stopper 1 shown in FIGS. Even if it is at the upper limit or lower limit within the allowable range of the inner diameter of the container, the container stopper inserted into this opening can be made hard to come off, and the container stopper is inserted into the opening with an appropriate force. Can be plugged in. Therefore, the covering 8 required for the conventional container stopper can be omitted, so that the cost can be reduced, and the labor for covering the small diameter portion with the covering 8 and bonding the covering 8 can be reduced. And it is easy to reuse the used container stopper as a resource.

According to each of the second and third aspects of the present invention, if the pressure in the cavity of the container rises due to, for example, a rise in temperature in a state where the container is inserted into the opening of the container and the opening is sealed, the pressure increases. Accordingly, a force is applied in a direction in which the container stopper comes off, and when the stopper body moves by a predetermined length or more in a direction in which the stopper body comes off from the opening portion, the pressure gas that has risen in the cavity portion is moved to the outer surface of the stopper body portion. Can be discharged to the outside of the container through a groove provided in the container. Thus, even when the pressure in the cavity of the container increases due to the rise in temperature, the container stopper can be prevented from coming off the opening. As described above, according to the container stoppers according to the first and third inventions, not only can the container stopper not easily come off the opening, but also the container stopper does not come off the opening. Therefore, since the container stopper does not come off from the opening, foreign matter does not enter from the opening, and even if the container falls down, the contents can be made hard to fall.

According to the third aspect of the present invention, in a state where the opening is sealed with the container stopper, for example, the pressure in the cavity increases due to a rise in temperature, and the pressure in the cavity deviates from the container stopper by this pressure. When a force is applied, first, the container stopper is in an inclined state so that the container stopper does not come off from the opening, so that a sealed state can be maintained. As a result, it is possible to prevent the evaporation and the aroma of, for example, sake etc. contained in the container from scattering. When the pressure in the cavity further increases, the pressure gas in the cavity is discharged to the outside of the container from the groove provided in the plug main body so that the container plug does not come off from the opening. Can be. Accordingly, it is possible to prevent foreign substances from being mixed in from the opening and to prevent the contents from spilling even when the container falls down.

[Brief description of the drawings]

FIG. 1 is a container stopper according to one embodiment of the present invention,
(A) is a front view showing a state of being inserted into the bottle mouth,
(B) is a front view which shows the state which inclined by the pressure in the hollow part of a bottle.

FIG. 2 is a front view showing a state in which the container stopper according to the embodiment moves in a direction in which it is released by the pressure in the cavity of the bottle, and releases the pressure gas in the cavity to the outside of the bottle.

FIG. 3 is a sectional view of the container stopper according to the embodiment shown in FIG.
It is sectional drawing seen from the A direction.

FIG. 4 is a container stopper according to the embodiment, wherein (a) is a plan view and (b) is a bottom view.

FIG. 5 is a front view showing a state where a conventional container stopper is inserted into a bottle mouth.

FIG. 6 is a central longitudinal sectional view of a conventional container stopper.

[Explanation of symbols]

 2 Outer wall part 3 Inner wall part 4 Flange part 5 Large diameter part 6 Small diameter part 10 Bottle mouth part 12 Container stopper 13 Plug body part 14 Projection 15 Groove 17 Hollow part

Claims (3)

[Claims] 1. A container plug having a synthetic resin plug main body, which can be sealed with the plug main body inserted into the container opening, wherein the plug main body comprises: Each has a small-diameter portion and a large-diameter portion each formed by a cylindrical outer peripheral surface, and in a state where the plug main body is inserted into the opening, the outer peripheral surface of the large-diameter portion and the inner portion of the opening are formed. The peripheral surface is in close contact with each other, the small diameter portion is located closer to the cavity in the container than the large diameter portion, and the inner surface of the opening portion is within about 180 ° or less of the outer peripheral surface of the small diameter portion. A container stopper provided with a projection or a ridge that abuts. 2. A container stopper having a plug body made of a synthetic resin and capable of sealing the opening with the plug body inserted into the opening of the container, wherein the opening is sealed. A groove communicating with the cavity inside the container and the outside of the container is provided on the outer surface of the plug main body in a state where the plug main body in the state has moved by a predetermined length or more in a direction away from the opening. A container stopper. 3. A container plug having a synthetic resin stopper main body and capable of sealing the opening with the stopper main body inserted into the container opening, wherein the stopper main body comprises: Each has a small-diameter portion and a large-diameter portion each formed by a cylindrical outer peripheral surface, and in a state where the plug main body is inserted into the opening, the outer peripheral surface of the large-diameter portion and the inner portion of the opening are formed. The peripheral surface is in close contact with each other, the small diameter portion is located closer to the cavity in the container than the large diameter portion, and the inner surface of the opening portion is within about 180 ° or less of the outer peripheral surface of the small diameter portion. In the state where the stopper main body in a state of sealing the opening is moved by a predetermined length or more in a direction in which the stopper body is separated from the opening, the hollow portion in the container and the container are provided. A container, wherein a groove communicating with the outside is provided on the outer surface of the plug body. Plug.