Sealed container

Abstract

The present invention provides a sealed container that can suppress the rise in internal pressure of the container body without compromising the external shape of the cap, and can also suppress the decrease in sealing performance that occurs in the cap attached to the mouth of the container body. [Solution] The sealed container 1 comprises a container body having a mouth 3 and a cap 10 having a sealing part 15. The container body has an internal thread 9 on the inside of the mouth 3. The cap 10 comprises an inner cylinder 11 having an external thread 19, a top wall 12 connected to the inner cylinder 11, and an outer cylinder 13 spaced apart from the inner cylinder 11. Inside the inner cylinder 11, there is a partition wall 14 that divides the inner cylinder 11 into an upper part 11a and a lower part 11b. The external thread 19 is located below the upper part 11a of the inner cylinder 11. The sealing part 15 is located above the partition wall 14.

Description

Technical Field

[0001] The present invention relates to a sealed container.

Background Art

[0002] In conventional sealed containers, for example, a packing is disposed between the mouth portion (bottle mouth) of the container body and the cap, and a ridge larger than the outer shape of the mouth portion (bottle mouth) of the container body is provided integrally with the top wall (top plate portion) of the cap. Thus, a pressure-resistant resin cap is known in which a gap covered by the top wall is formed between the circumferential side wall of the cap and the ridge, and the ridge compresses the outer peripheral edge portion of the packing (see, for example, Patent Document 1). According to this sealed container, due to both the compressive deformation of the outer peripheral edge portion of the packing and the elastic deformation of the ridge outward in diameter, a pressure-resistant sealing force is applied to the outer peripheral edge portion of the mouth portion of the container body (bottle mouth outer peripheral edge portion).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above-described conventional sealed container, the upper end of the mouth portion of the container body is sealed with a packing disposed on the back surface of the top wall of the cap by screwing a female screw provided on the mouth portion of the container body and a male screw provided on the circumferential side wall of the cap. Therefore, when the pressure (internal pressure) inside the container body increases, if doming (backlink) occurs due to the bulging of the top wall of the cap, it may affect the external appearance shape of the cap. In addition, when doming occurs on the top wall of the cap, deformation may occur in the circumferential side wall continuous with the top wall following the bulging of the top wall, which may weaken the engagement of the cap (screw) and cause a decrease in sealing performance.

[0005] The object of the present invention is to provide a sealed container that can suppress the rise in internal pressure of the container body without impairing the external shape of the cap, and can suppress the decrease in sealing performance that occurs in the cap attached to the mouth of the container body. [Means for solving the problem]

[0006] (1) The present invention provides a sealed container comprising a container body having a cylindrical opening and a cap having a sealing portion attached to the opening and sealing the inner circumferential surface of the opening over its entire circumference, wherein the container body has a female thread on the inside of the opening, the cap comprises an inner cylinder having a male thread that removably screws into the female thread, a top wall connected to the inner cylinder and extending radially outward in an annular shape, and an outer cylinder connected to the radially outer portion of the top wall and spaced radially apart from the inner cylinder, wherein a partition wall is provided inside the inner cylinder to close the inside of the inner cylinder and divide the inner cylinder into an upper portion and a lower portion, the male thread is located below the upper portion of the inner cylinder and the sealing portion is located above the partition wall.

[0007] (2) In the sealed container of (1) above, it is preferable that the male thread is located in the lower part of the inner cylinder, the upper part of the inner cylinder is located radially outward from the lower part of the inner cylinder via the partition wall, and the partition wall forms the upper end of the lower part of the inner cylinder.

[0008] (3) In the sealed container of (1) or (2) above, the opening portion comprises an upper portion and a lower portion, the upper portion of the opening portion is positioned radially outward from the upper portion of the inner cylinder, and the sealing portion is a sealed cylinder that extends downward from the top wall and seals the inner circumferential surface of the upper portion of the opening portion over its entire circumference.

[0009] (4) In any one of the sealed containers described in (1) to (3) above, it is preferable that the female thread has a notch at least at one location in the circumferential direction that cuts through the female thread vertically.

[0010] (5) In any one of the sealed containers described in (1) to (4) above, it is preferable that the inner diameter of the opening of the container body is 1 / 2 or more of the outer diameter of the body of the container body.

[0011] (6) In any one of the sealed containers described in (1) to (5) above, the container body is for holding contents with a carbon dioxide content exceeding 3.0 gas volume (GV), and the maximum inner diameter of the opening is preferably 30 mm or more. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a sealed container that can suppress the rise in internal pressure of the container body without impairing the external shape of the cap, and can also suppress loosening of the cap attached to the mouth of the container body. [Brief explanation of the drawing]

[0013] [Figure 1] This is a schematic front view showing a partially cross-sectional view of a sealed container, which is one embodiment of the present invention. [Figure 2] This is an enlarged view showing a magnified view of region X in Figure 1. [Figure 3] This is a plan view of the sealed container shown from above in Figure 1. [Figure 4] This is a front view showing only the container body, which is one of the components of the sealed container in Figure 1. [Figure 5] Figure 4 is a plan view showing the container body from above. [Figure 6] This is a front view showing only the cap, which is one of the components of the sealed container in Figure 1. [Modes for carrying out the invention]

[0014] A sealed container, which is one embodiment of the present invention, will be described below with reference to the drawings.

[0015] In FIG. 1, reference numeral 1 denotes a sealed container which is an embodiment of the present invention. In FIG. 1, a part including the cap 10 of the sealed container 1 is shown in cross section. In FIG. 2, the region X of FIG. 1 is shown enlarged. Further, in FIG. 3, the sealed container 1 is shown from above.

[0016] As shown in FIG. 1, the sealed container 1 includes a container body 2 having a cylindrical mouth portion 3, and a cap 10 attached to the mouth portion 3 and having a sealing portion 15 that seals the inner peripheral surface of the mouth portion 3 over the entire circumference.

[0017] The container body 2 is an injection blow molded container formed by stretch blow molding using a resin preform. The material of the container body 2 can be, for example, PET (polyethylene terephthalate) resin. However, the material of the container body 2 is not limited to resin.

[0018] The axis O is the central axis of the sealed container 1. In the present embodiment, the central axis of the sealed container 1 and the central axis of the cap 10 are coaxial with the axis O. Here, the "lower side" refers to the side of the container body 2 along the axis O, and the "upper side" refers to the side of the cap 10 along the axis O. Further, the "axial direction" refers to the direction in which the axis O extends. Furthermore, the "axis perpendicular direction" (also referred to as the "radial direction") refers to the direction perpendicular to the axial direction (vertical direction). Also, the "axis perpendicular direction inner side" (also referred to as the "radial direction inner side") refers to the side closer to the axis O in the axis perpendicular direction (radial direction), and the "axis perpendicular direction outer side" (also referred to as the "radial direction outer side") refers to the side farther from the axis O in the axis perpendicular direction (radial direction). Also, the "circumferential direction" refers to the circumferential direction of the axis O.

[0019] Figure 4 shows only the container body 2. In this embodiment, the container body 2 is a bottle container. In this embodiment, the container body 2 comprises a mouth portion 3, a neck portion 4 connected to the mouth portion 3, a shoulder portion 5 connected to the neck portion 4, a body portion 6 connected to the shoulder portion 5, and a bottom portion 7 that closes the lower end of the body portion 6. Inside the container body 2, a storage space S capable of containing contents is formed. The storage space S is connected to the outside world through an opening A formed on the inside of the mouth portion 3. In this embodiment, the container body 2 contains a liquid that is effervescent, as will be described later. For this reason, in this embodiment, the shape of the bottom portion 7 is a so-called petaloid shape. However, the shape of the bottom portion 7 is not limited to a petaloid shape and can be changed as appropriate according to the contents.

[0020] Furthermore, in this embodiment, the container body 2 is equipped with a neck ring 8. The neck ring 8 protrudes radially outward from the neck portion 4 and extends in an annular shape around its entire circumference. In this embodiment, the mouth portion 3 is positioned above the neck ring 8.

[0021] In this embodiment, the mouth portion 3 includes an upper portion 3a and a lower portion 3b. In FIG. 5, the container body 2 is shown from above. As shown in FIG. 5, each of the mouth portion 3 and the body portion 6 extends annularly in the radial direction over the entire circumference in the circumferential direction. Referring to FIG. 4, in this embodiment, the lower portion 3b of the mouth portion 3 is continuous with the neck portion 4. Also, in this embodiment, the upper portion 3a of the mouth portion 3 is located radially outside the lower portion 3b. Specifically, in this embodiment, the upper portion 3a and the lower portion 3b are connected by a diameter-expanded portion 3c. The diameter-expanded portion 3c protrudes radially outward from the lower portion 3b. In this embodiment, the diameter-expanded portion 3c is inclined radially outward as it goes upward. The diameter-expanded portion 3c extends annularly in the radial direction over the entire circumference in the circumferential direction together with the upper portion 3a and the lower portion 3b. In this embodiment, the symbol D1 is the inner diameter (diameter) of the upper portion 3a of the mouth portion 3. Also, in this embodiment, the symbol D2 is the inner diameter (diameter) of the lower portion 3b of the mouth portion 3. In this embodiment, the inner diameter D1 of the mouth portion 3 is larger than the inner diameter D2 of the mouth portion 3.

[0022] In this embodiment, the container body 2 is such that the inner diameter D1 of the mouth portion 3 is at least 1 / 2 of the outer diameter (diameter) D3 of the body portion 6. Such a container is also called, for example, a wide-mouth container. In this embodiment, the body portion 6 has a straight shape with an equal outer diameter D3 along the axial direction.

[0023] In this embodiment, the container body 2 is for containing a content having a carbon dioxide gas content exceeding 3.0 gas volumes. Examples of the content include soft drinks such as carbonated water and soda, and alcoholic beverages such as beer and sparkling wine. However, the content is not limited to a foaming content and can be a non-foaming content.

[0024] The inner diameter of the opening 3 is preferably 30 mm or more, and more preferably the inner diameter D1 of the opening 3 is greater than 30 mm. In this embodiment, the inner diameter D1 of the opening 3 is 45 mm. Also in this embodiment, the outer diameter D3 of the body 6 is 66.5 mm. The inner diameter D2 of the opening 3 is 37.6 mm. However, these values ​​are exemplary. For example, in this embodiment, the values ​​of the inner diameter D1 of the opening 3 and the outer diameter D3 of the body 6 are such that the inner diameter D1 is at least half the outer diameter D3.

[0025] The container body 2 is equipped with an internal thread 9 on the inside of the opening 3.

[0026] In this embodiment, the female thread 9 is provided on the inner circumferential surface of the lower portion 3b of the opening 3. The female thread 9 extends spirally around the axis O.

[0027] The female thread 9 has at least one notch C in the circumferential direction that cuts vertically through the female thread 9. As shown in Figure 4, the notches C are positioned in a straight line in the axial direction. As a result, as shown in Figure 5, the axially aligned notches C allow the storage space S to pass straight toward the opening A without being obstructed by the thread 9. In this embodiment, the container body 2 has a plurality of notches C. As a result, the contents stored in the container body 2 can flow axially along the notches C and through the gaps in the thread 9.

[0028] In this embodiment, the bottom surface of the notch C is flush with the inner circumferential surface of the opening 3 (in this embodiment, the inner circumferential surface of the lower portion 3b). That is, the radial depth of the notch C is the same as the radial height of the female thread 9. However, the bottom surface of the notch C can be located radially outward from the inner circumferential surface of the opening 3. That is, the radial depth of the notch C can be made radially deeper than the inner circumferential surface of the opening 3 (in this embodiment, the inner circumferential surface of the lower portion 3b). In other words, the notch C can be a groove formed on the inner circumferential surface of the opening 3.

[0029] On the other hand, the cap 10 is, for example, a resin cap that is injection-molded using a mold. The material of the cap 10 can be, for example, PP (polypropylene) resin. However, the material of the cap 10 is not limited to PP resin.

[0030] Referring to Figure 2, the cap 10 comprises an inner cylinder 11 with a male thread 19 that removably screws onto a female thread 9 provided on the container body 2, a top wall 12 that is connected to the inner cylinder 11 and extends radially outward in an annular shape, and an outer cylinder 13 that is connected to the radially outward portion of the top wall 12 and is arranged radially apart from the inner cylinder 11.

[0031] Figure 6 shows the cap 10 from a side view. The male thread 19 extends spirally around the axis O. The male thread 19 may also be provided intermittently in the circumferential direction. When the male thread 19 is an intermittent thread, when the cap 10 is opened, the notch C of the female thread 9 provided in the container body 2 and the intermittent portion of the male thread 19 align in the axial direction, creating an axial gap between the female thread 9 and the male thread 19. This gap allows the gas filling the container body 2 to escape to the outside more easily, preventing the cap 10 from being blown off when it is opened.

[0032] Referring to Figure 2, a partition wall 14 is provided inside the inner cylinder 11, which closes the inside of the inner cylinder 11 and divides the inner cylinder 11 into an upper portion 11a and a lower portion 11b.

[0033] Referring to Figure 2, the male thread 19 provided on the cap 10 is located below the upper portion 11a of the inner cylinder 11. In this embodiment, the male thread 19 is located on the lower portion 11b of the inner cylinder 11. However, the male thread 19 may also be provided on the portion of the inner cylinder 11 corresponding to the partition wall 14.

[0034] In this embodiment, the upper portion 11a of the inner cylinder 11 is positioned radially outward from the lower portion 11b via a partition wall 14. Specifically, in this embodiment, the upper portion 11a and the lower portion 11b are connected by an enlarged diameter portion 11c. The enlarged diameter portion 11c protrudes radially outward from the lower portion 11b. In this embodiment, the enlarged diameter portion 11c is inclined radially outward as it extends upward. The enlarged diameter portion 11c, together with the upper portion 11a and the lower portion 11b, extends radially and circumferentially in an annular manner around the entire circumference.

[0035] In this embodiment, the partition wall 14 forms the upper end 11e of the lower portion 11b, thereby allowing the upper portion 11a of the inner cylinder 11 to move freely relative to the partition wall 14 with respect to the enlarged diameter portion 11c. In other words, the partition wall 14 of the inner cylinder 11, together with the lower portion 11b, can move freely relative to the upper portion 11a connected to the enlarged diameter portion 11c.

[0036] Figure 3 shows the state in which the inside of the inner cylinder 11 of the cap 10 is closed by the partition wall 14. In this embodiment, the inner cylinder 11 is provided with knurling 16 on the inner circumferential surface of the upper portion 11a. The knurling 16 has a plurality of protrusions 16a that extend in the axial direction and are spaced apart in the circumferential direction.

[0037] Referring to Figure 2, the sealing section 15 is positioned above the partition wall 14.

[0038] Referring to Figure 2, the upper portion 3a of the mouth 3 is positioned radially outward from the upper portion 11a of the inner cylinder 11. A gap R is formed between the upper portion 3a of the mouth 3 and the upper portion 11a of the inner cylinder 11, which is closed by the top wall 12. Furthermore, the sealing portion 15 is a sealing cylinder (inner ring) that extends downward from the top wall 12 and seals the inner circumferential surface of the upper portion 3a of the mouth 3 around its entire circumference. As a result, when the cap 10 is attached to the mouth 3 of the container body 2, it seals the inner circumferential surface of the mouth 3 of the container body 2 in a liquid-tight state, as shown in Figure 2.

[0039] In addition, in this embodiment, the top wall 12 of the cap 10 is provided with an annular projection 17 that extends downward from the top wall 12 and seals the upper end 3e of the mouth 3 around its entire circumference. The annular projection 17 is provided on the top wall 12 between the outer cylinder 13 and the sealing cylinder 15. As a result, when the cap 10 is attached to the mouth 3 of the container body 2, it further seals the upper end 3e of the mouth 3 of the container body 2 in a liquid-tight state, as shown in Figure 2.

[0040] The sealed container 1 is constructed by screw-fitting a male thread 19 on the inner cylinder 11 of the cap 10 to a female thread 9 on the mouth 2 of the container body 2. That is, the cap 10 is fixed to the mouth 3 of the container body 2 by screw-fitting the inner cylinder 11 of the cap 10 inside the mouth 3 of the container body 2. In this case, the inner cylinder 11 of the cap 10 is constrained radially inward by the mouth 3 inside the mouth 3 of the container body 2. Therefore, the sealed container 1 can suppress deformation of the threaded portion (male thread 9 and female thread 19) 90 that may occur due to an increase in the internal pressure of the container body 2. As a result, even when the internal pressure of the container body 2 increases, the screw-fitting engagement between the container body 2 and the cap 10 is maintained, thus preserving the airtightness of the cap 10 and providing a highly airtight sealed container.

[0041] Furthermore, with the sealed container 1, when the internal pressure of the container body 2 rises, the increase in internal pressure can be absorbed by the partition wall 14 bulging upward (so-called doming), as shown by the dashed line in Figure 2. Also, since the doming of the partition wall 14 occurs inside the inner cylinder 11, the effect on the threaded portion 90 located on the outside of the inner cylinder 11 can be suppressed. Therefore, with the sealed container 1, the airtightness of the cap 10 is better maintained, resulting in a sealed container with improved airtightness.

[0042] Furthermore, as described above, the sealed container 1 can suppress deformation of the threaded portion 90 while suppressing the rise in internal pressure of the container body 2. Therefore, the sealed container 1 can suppress the popping out of the cap 10 from the container body 2 (so-called "cap popping") caused by the rise in internal pressure of the container body 2, thus becoming a sealed container with so-called explosion-proof measures.

[0043] In addition, the sealed container 1 houses the partition wall 14 inside the inner cylinder 11. In other words, the sealed container 1 utilizes the bottom of the recess 10a that opens at the upper end of the inner cylinder 11 as the partition wall 14. Therefore, the doming of the partition wall 14 is not visible from the outside of the inner cylinder 11. For example, in this embodiment, since a portion of the total height of the cap 10 depends on the height of the inner cylinder 11, even if the partition wall 14 domes, there is no change in the total height of the cap 10 before and after the doming occurs. Therefore, the sealed container 1 does not impair the external shape of the cap 10.

[0044] Therefore, the sealed container 1 can suppress the rise in internal pressure of the container body 2 without damaging the external shape of the cap 10, and can also suppress loosening of the cap 10 attached to the mouth 3 of the container body 2.

[0045] Furthermore, in the sealed container 1, the male thread 9 of the container body 2 is located on the lower part 11b of the inner cylinder 11. In this case, when a user drinks the contents of the container body 2 by putting their mouth to the mouth 3 of the container body 2, for example, referring to Figure 4, the upper part 11a of the inner cylinder 11, which does not have the male thread 9, will come into contact with the user's mouth. Therefore, the sealed container 1 makes it possible to improve the mouthfeel when drinking the contents by putting the mouth to the container body 2.

[0046] Furthermore, as shown in Figure 2, in the sealed container 1, the male thread 19 of the container body 2 is positioned on the lower portion 11b of the inner cylinder 11 of the cap 10, while the upper portion 11a of the inner cylinder 11 is positioned radially outward from the lower portion 11b of the inner cylinder 11 via a partition wall 14, and the partition wall 14 further forms the upper end 11e of the lower portion 11b of the inner cylinder 11. In this case, the partition wall 14 can move freely with respect to the upper portion 11a together with the lower portion 11b of the inner cylinder 11, while the lower portion 11b of the inner cylinder 11 is firmly fixed radially inward by the mouth 3 of the container body 2. As a result, only the partition wall 14 can move freely and efficiently. Therefore, the sealed container 1 can further suppress the rise in internal pressure of the container body 2 and further suppress loosening of the cap 10.

[0047] In addition, the sealed container 1 positions the upper portion 3a of the mouth 3 of the container body 2 radially outward from the upper portion 11a of the inner cylinder 11 of the cap 10, while the sealing portion 15 hangs down from the top wall 12 and seals the inner circumferential surface of the upper portion 3a of the mouth 3 around its entire circumference. In this case, by moving the sealing portion 15 of the cap 10 away from the inner cylinder 11, deformation can be suppressed not only when deformation occurs in the upper end portion 11a of the inner cylinder 11, but also when deformation occurs in the sealing portion 15 provided on the top wall 12 connected to the upper portion 11a. Therefore, the sealed container 1 ensures that the airtightness between the mouth 3 of the container body 2 and the cap 10 is reliably maintained.

[0048] In addition, as shown in Figure 5, for example, the sealed container 1 has a notch C in at least one circumferential location of the female thread 9 that cuts vertically through the female thread 9 in the axial direction (up and down direction). In this case, the contents contained in the container body 2 can be effectively removed through the notch C. Therefore, with the sealed container 1, interference of the thread 9 that occurs when removing the contents is reduced, making it possible to remove the contents efficiently with less remaining contents.

[0049] Furthermore, in the sealed container 1, the container body 2 has an inner diameter D1 of the mouth 3 that is at least half the outer diameter D3 of the body 6. Such containers are also called wide-mouth containers, and conventional wide-mouth containers had concerns about the cap flying off due to the increase in internal pressure of the container body 2. In contrast, as described above, the sealed container 1 is a sealed container with so-called explosion-proof measures, and is therefore effective when used as a wide-mouth container, as in this embodiment.

[0050] By the way, in conventional sealed containers, such as those described in Patent Document 1, if the inner diameter D1 of the mouth 3 exceeds 30 mm, it was not possible to guarantee airtightness between the mouth of the container body and the cap when the contents of the container body 2 contain more than 3.0 gas volume (GV) of carbon dioxide. For example, if summer is defined and the container is stored at an ambient temperature of 40°C, conventional sealed containers may not be able to ensure airtightness at the top wall of the cap due to doming at the top wall of the cap. Specifically, in the sealed container described in Patent Document 1, if the container body is a container that holds contents with a carbon dioxide content of 4.0 gas volume, and the inner diameter of the mouth of the container is 28 mm, it may not be possible to ensure airtightness at the top wall of the cap when stored at an ambient temperature of 40°C.

[0051] In contrast, in the sealed container 1, the container body 2 is designed to hold contents with a carbon dioxide content exceeding 3.0 gas volume, while the inner diameter D1 of the mouth 3 is 30 mm or more. For example, in the sealed container 1, the container body 2 is a container that holds contents with a carbon dioxide content of 4.0 gas volume, with an inner diameter D1 of the upper part 3a of the mouth 3 being 45 mm and an inner diameter D2 of the lower part 3b being 37.6 mm. When using the container body 2 of this embodiment, the airtightness of the top wall 12 of the cap 10 can be ensured even when stored at an ambient temperature of 40°C. For this reason, the sealed container 1 is effective when used as a wide-mouth container that holds contents with a carbon dioxide content exceeding 3.0 gas volume in a container body 2 with an inner diameter D1 of the mouth 3 of 30 mm or more, preferably exceeding 30 mm, more preferably 37 mm or more.

[0052] As described above, the sealed container 1 can provide a sealed container that can suppress the rise in internal pressure of the container body 2 without impairing the external shape of the cap 10, and can ensure airtightness by the cap 10 attached to the mouth 3 of the container body 2.

[0053] As described above, exemplary embodiments of the present invention have been described, but the present invention is not limited to these embodiments and can be modified in various ways without departing from the spirit of the invention. For example, in the cap 10, the outer cylinder 13 can be made to protrude radially outward from the outer cylinder 13 of the top wall 12. In the cap 20, the sealing cylinder 15 can be provided integrally with the outer circumferential surface of the inner cylinder 11, thereby forming a stepped portion on the outer circumferential surface of the inner cylinder 11. [Explanation of symbols]

[0054] 1: Sealed container, 2: Container body, 3: Mouth, 3a: Upper part, 3b: Lower part, 3c: Enlarged diameter part, 4: Neck, 5: Shoulder, 6: Body, 7: Bottom, 8: Neck ring, 9: Male thread, 10: Cap, 11: Inner cylinder, 11a: Upper part, 11b: Lower part, 11c: Enlarged diameter part, 12: Top wall, 13: Outer cylinder, 14: Partition wall, 15: Sealing part, 16: Knurling, 16a: Rib, 17: Annular projection, 19: Female thread, 90: Threaded part, C: Notch

Claims

1. The container comprises a container body having a cylindrical opening, and a cap that is attached to the opening and has a sealing portion that seals the entire inner surface of the opening. The container body is provided with an internal thread on the inside of the opening. The cap comprises an inner cylinder having a male thread that removably screws into the female thread, a top wall connected to the inner cylinder and extending radially outward in an annular shape, and an outer cylinder connected to the radially outward portion of the top wall and positioned radially apart from the inner cylinder. Inside the inner cylinder, there is a partition wall that closes the inside of the inner cylinder and divides it into an upper portion and a lower portion. The aforementioned male thread is positioned below the upper portion of the inner cylinder. The sealed portion is located above the partition wall in the sealed container.

2. The aforementioned male thread is located in the lower part of the inner cylinder, The upper portion of the inner cylinder is positioned radially outward from the lower portion of the inner cylinder via the partition wall. The sealed container according to claim 1, wherein the partition wall forms the upper end of the lower portion of the inner cylinder.

3. The opening comprises an upper portion and a lower portion, and the upper portion of the opening is positioned radially outward from the upper portion of the inner cylinder. The sealed container according to claim 1 or 2, wherein the sealing portion is a sealed cylinder that extends downward from the top wall and seals the entire inner surface of the upper portion of the opening.

4. The sealed container according to claim 1 or 2, wherein the female thread has a notch at least at one location in the circumferential direction that vertically intersects the female thread in the vertical direction.

5. The sealed container according to claim 1, wherein the container body has an inner diameter of the opening that is 1 / 2 or more of the outer diameter of the body of the container body.

6. The container body is designed to hold contents with a carbon dioxide content exceeding 3.0 gas volume (GV), The sealed container according to claim 1, wherein the maximum inner diameter of the opening is 30 mm or more.

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